diff options
Diffstat (limited to 'fs')
144 files changed, 5012 insertions, 881 deletions
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c index 1964f98e74b..b85efa77394 100644 --- a/fs/9p/v9fs.c +++ b/fs/9p/v9fs.c @@ -594,21 +594,21 @@ static int __init init_v9fs(void) int err; pr_info("Installing v9fs 9p2000 file system support\n"); /* TODO: Setup list of registered trasnport modules */ - err = register_filesystem(&v9fs_fs_type); - if (err < 0) { - pr_err("Failed to register filesystem\n"); - return err; - } err = v9fs_cache_register(); if (err < 0) { pr_err("Failed to register v9fs for caching\n"); - goto out_fs_unreg; + return err; } err = v9fs_sysfs_init(); if (err < 0) { pr_err("Failed to register with sysfs\n"); + goto out_cache; + } + err = register_filesystem(&v9fs_fs_type); + if (err < 0) { + pr_err("Failed to register filesystem\n"); goto out_sysfs_cleanup; } @@ -617,8 +617,8 @@ static int __init init_v9fs(void) out_sysfs_cleanup: v9fs_sysfs_cleanup(); -out_fs_unreg: - unregister_filesystem(&v9fs_fs_type); +out_cache: + v9fs_cache_unregister(); return err; } diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index 7b0cd87b07c..10b7d3c9dba 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -155,9 +155,8 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags, goto release_sb; } - root = d_alloc_root(inode); + root = d_make_root(inode); if (!root) { - iput(inode); retval = -ENOMEM; goto release_sb; } diff --git a/fs/Kconfig b/fs/Kconfig index aa195265362..f95ae3a027f 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -214,6 +214,7 @@ source "fs/minix/Kconfig" source "fs/omfs/Kconfig" source "fs/hpfs/Kconfig" source "fs/qnx4/Kconfig" +source "fs/qnx6/Kconfig" source "fs/romfs/Kconfig" source "fs/pstore/Kconfig" source "fs/sysv/Kconfig" diff --git a/fs/Makefile b/fs/Makefile index 93804d4d66e..2fb97793467 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -102,6 +102,7 @@ obj-$(CONFIG_UBIFS_FS) += ubifs/ obj-$(CONFIG_AFFS_FS) += affs/ obj-$(CONFIG_ROMFS_FS) += romfs/ obj-$(CONFIG_QNX4FS_FS) += qnx4/ +obj-$(CONFIG_QNX6FS_FS) += qnx6/ obj-$(CONFIG_AUTOFS4_FS) += autofs4/ obj-$(CONFIG_ADFS_FS) += adfs/ obj-$(CONFIG_FUSE_FS) += fuse/ diff --git a/fs/adfs/super.c b/fs/adfs/super.c index 8e3b36ace30..06fdcc9382c 100644 --- a/fs/adfs/super.c +++ b/fs/adfs/super.c @@ -483,10 +483,9 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_d_op = &adfs_dentry_operations; root = adfs_iget(sb, &root_obj); - sb->s_root = d_alloc_root(root); + sb->s_root = d_make_root(root); if (!sb->s_root) { int i; - iput(root); for (i = 0; i < asb->s_map_size; i++) brelse(asb->s_map[i].dm_bh); kfree(asb->s_map); diff --git a/fs/affs/super.c b/fs/affs/super.c index 8ba73fed796..0782653a05a 100644 --- a/fs/affs/super.c +++ b/fs/affs/super.c @@ -473,7 +473,7 @@ got_root: root_inode = affs_iget(sb, root_block); if (IS_ERR(root_inode)) { ret = PTR_ERR(root_inode); - goto out_error_noinode; + goto out_error; } if (AFFS_SB(sb)->s_flags & SF_INTL) @@ -481,7 +481,7 @@ got_root: else sb->s_d_op = &affs_dentry_operations; - sb->s_root = d_alloc_root(root_inode); + sb->s_root = d_make_root(root_inode); if (!sb->s_root) { printk(KERN_ERR "AFFS: Get root inode failed\n"); goto out_error; @@ -494,9 +494,6 @@ got_root: * Begin the cascaded cleanup ... */ out_error: - if (root_inode) - iput(root_inode); -out_error_noinode: kfree(sbi->s_bitmap); affs_brelse(root_bh); kfree(sbi->s_prefix); diff --git a/fs/afs/super.c b/fs/afs/super.c index 983ec59fc80..f02b31e7e64 100644 --- a/fs/afs/super.c +++ b/fs/afs/super.c @@ -301,7 +301,6 @@ static int afs_fill_super(struct super_block *sb, { struct afs_super_info *as = sb->s_fs_info; struct afs_fid fid; - struct dentry *root = NULL; struct inode *inode = NULL; int ret; @@ -327,18 +326,16 @@ static int afs_fill_super(struct super_block *sb, set_bit(AFS_VNODE_AUTOCELL, &AFS_FS_I(inode)->flags); ret = -ENOMEM; - root = d_alloc_root(inode); - if (!root) + sb->s_root = d_make_root(inode); + if (!sb->s_root) goto error; sb->s_d_op = &afs_fs_dentry_operations; - sb->s_root = root; _leave(" = 0"); return 0; error: - iput(inode); _leave(" = %d", ret); return ret; } @@ -199,16 +199,7 @@ static int aio_setup_ring(struct kioctx *ctx) static void ctx_rcu_free(struct rcu_head *head) { struct kioctx *ctx = container_of(head, struct kioctx, rcu_head); - unsigned nr_events = ctx->max_reqs; - kmem_cache_free(kioctx_cachep, ctx); - - if (nr_events) { - spin_lock(&aio_nr_lock); - BUG_ON(aio_nr - nr_events > aio_nr); - aio_nr -= nr_events; - spin_unlock(&aio_nr_lock); - } } /* __put_ioctx @@ -217,13 +208,19 @@ static void ctx_rcu_free(struct rcu_head *head) */ static void __put_ioctx(struct kioctx *ctx) { + unsigned nr_events = ctx->max_reqs; BUG_ON(ctx->reqs_active); - cancel_delayed_work(&ctx->wq); - cancel_work_sync(&ctx->wq.work); + cancel_delayed_work_sync(&ctx->wq); aio_free_ring(ctx); mmdrop(ctx->mm); ctx->mm = NULL; + if (nr_events) { + spin_lock(&aio_nr_lock); + BUG_ON(aio_nr - nr_events > aio_nr); + aio_nr -= nr_events; + spin_unlock(&aio_nr_lock); + } pr_debug("__put_ioctx: freeing %p\n", ctx); call_rcu(&ctx->rcu_head, ctx_rcu_free); } @@ -247,7 +244,7 @@ static struct kioctx *ioctx_alloc(unsigned nr_events) { struct mm_struct *mm; struct kioctx *ctx; - int did_sync = 0; + int err = -ENOMEM; /* Prevent overflows */ if ((nr_events > (0x10000000U / sizeof(struct io_event))) || @@ -256,7 +253,7 @@ static struct kioctx *ioctx_alloc(unsigned nr_events) return ERR_PTR(-EINVAL); } - if ((unsigned long)nr_events > aio_max_nr) + if (!nr_events || (unsigned long)nr_events > aio_max_nr) return ERR_PTR(-EAGAIN); ctx = kmem_cache_zalloc(kioctx_cachep, GFP_KERNEL); @@ -280,25 +277,14 @@ static struct kioctx *ioctx_alloc(unsigned nr_events) goto out_freectx; /* limit the number of system wide aios */ - do { - spin_lock_bh(&aio_nr_lock); - if (aio_nr + nr_events > aio_max_nr || - aio_nr + nr_events < aio_nr) - ctx->max_reqs = 0; - else - aio_nr += ctx->max_reqs; - spin_unlock_bh(&aio_nr_lock); - if (ctx->max_reqs || did_sync) - break; - - /* wait for rcu callbacks to have completed before giving up */ - synchronize_rcu(); - did_sync = 1; - ctx->max_reqs = nr_events; - } while (1); - - if (ctx->max_reqs == 0) + spin_lock(&aio_nr_lock); + if (aio_nr + nr_events > aio_max_nr || + aio_nr + nr_events < aio_nr) { + spin_unlock(&aio_nr_lock); goto out_cleanup; + } + aio_nr += ctx->max_reqs; + spin_unlock(&aio_nr_lock); /* now link into global list. */ spin_lock(&mm->ioctx_lock); @@ -310,16 +296,13 @@ static struct kioctx *ioctx_alloc(unsigned nr_events) return ctx; out_cleanup: - __put_ioctx(ctx); - return ERR_PTR(-EAGAIN); - + err = -EAGAIN; + aio_free_ring(ctx); out_freectx: mmdrop(mm); kmem_cache_free(kioctx_cachep, ctx); - ctx = ERR_PTR(-ENOMEM); - - dprintk("aio: error allocating ioctx %p\n", ctx); - return ctx; + dprintk("aio: error allocating ioctx %d\n", err); + return ERR_PTR(err); } /* aio_cancel_all @@ -407,10 +390,6 @@ void exit_aio(struct mm_struct *mm) aio_cancel_all(ctx); wait_for_all_aios(ctx); - /* - * Ensure we don't leave the ctx on the aio_wq - */ - cancel_work_sync(&ctx->wq.work); if (1 != atomic_read(&ctx->users)) printk(KERN_DEBUG @@ -920,7 +899,7 @@ static void aio_kick_handler(struct work_struct *work) unuse_mm(mm); set_fs(oldfs); /* - * we're in a worker thread already, don't use queue_delayed_work, + * we're in a worker thread already; no point using non-zero delay */ if (requeue) queue_delayed_work(aio_wq, &ctx->wq, 0); diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c index f11e43ed907..28d39fb84ae 100644 --- a/fs/anon_inodes.c +++ b/fs/anon_inodes.c @@ -39,19 +39,6 @@ static const struct dentry_operations anon_inodefs_dentry_operations = { .d_dname = anon_inodefs_dname, }; -static struct dentry *anon_inodefs_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data) -{ - return mount_pseudo(fs_type, "anon_inode:", NULL, - &anon_inodefs_dentry_operations, ANON_INODE_FS_MAGIC); -} - -static struct file_system_type anon_inode_fs_type = { - .name = "anon_inodefs", - .mount = anon_inodefs_mount, - .kill_sb = kill_anon_super, -}; - /* * nop .set_page_dirty method so that people can use .page_mkwrite on * anon inodes. @@ -65,6 +52,62 @@ static const struct address_space_operations anon_aops = { .set_page_dirty = anon_set_page_dirty, }; +/* + * A single inode exists for all anon_inode files. Contrary to pipes, + * anon_inode inodes have no associated per-instance data, so we need + * only allocate one of them. + */ +static struct inode *anon_inode_mkinode(struct super_block *s) +{ + struct inode *inode = new_inode_pseudo(s); + + if (!inode) + return ERR_PTR(-ENOMEM); + + inode->i_ino = get_next_ino(); + inode->i_fop = &anon_inode_fops; + + inode->i_mapping->a_ops = &anon_aops; + + /* + * Mark the inode dirty from the very beginning, + * that way it will never be moved to the dirty + * list because mark_inode_dirty() will think + * that it already _is_ on the dirty list. + */ + inode->i_state = I_DIRTY; + inode->i_mode = S_IRUSR | S_IWUSR; + inode->i_uid = current_fsuid(); + inode->i_gid = current_fsgid(); + inode->i_flags |= S_PRIVATE; + inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; + return inode; +} + +static struct dentry *anon_inodefs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) +{ + struct dentry *root; + root = mount_pseudo(fs_type, "anon_inode:", NULL, + &anon_inodefs_dentry_operations, ANON_INODE_FS_MAGIC); + if (!IS_ERR(root)) { + struct super_block *s = root->d_sb; + anon_inode_inode = anon_inode_mkinode(s); + if (IS_ERR(anon_inode_inode)) { + dput(root); + deactivate_locked_super(s); + root = ERR_CAST(anon_inode_inode); + } + } + return root; +} + +static struct file_system_type anon_inode_fs_type = { + .name = "anon_inodefs", + .mount = anon_inodefs_mount, + .kill_sb = kill_anon_super, +}; + /** * anon_inode_getfile - creates a new file instance by hooking it up to an * anonymous inode, and a dentry that describe the "class" @@ -180,38 +223,6 @@ err_put_unused_fd: } EXPORT_SYMBOL_GPL(anon_inode_getfd); -/* - * A single inode exists for all anon_inode files. Contrary to pipes, - * anon_inode inodes have no associated per-instance data, so we need - * only allocate one of them. - */ -static struct inode *anon_inode_mkinode(void) -{ - struct inode *inode = new_inode_pseudo(anon_inode_mnt->mnt_sb); - - if (!inode) - return ERR_PTR(-ENOMEM); - - inode->i_ino = get_next_ino(); - inode->i_fop = &anon_inode_fops; - - inode->i_mapping->a_ops = &anon_aops; - - /* - * Mark the inode dirty from the very beginning, - * that way it will never be moved to the dirty - * list because mark_inode_dirty() will think - * that it already _is_ on the dirty list. - */ - inode->i_state = I_DIRTY; - inode->i_mode = S_IRUSR | S_IWUSR; - inode->i_uid = current_fsuid(); - inode->i_gid = current_fsgid(); - inode->i_flags |= S_PRIVATE; - inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; - return inode; -} - static int __init anon_inode_init(void) { int error; @@ -224,16 +235,8 @@ static int __init anon_inode_init(void) error = PTR_ERR(anon_inode_mnt); goto err_unregister_filesystem; } - anon_inode_inode = anon_inode_mkinode(); - if (IS_ERR(anon_inode_inode)) { - error = PTR_ERR(anon_inode_inode); - goto err_mntput; - } - return 0; -err_mntput: - kern_unmount(anon_inode_mnt); err_unregister_filesystem: unregister_filesystem(&anon_inode_fs_type); err_exit: diff --git a/fs/autofs4/init.c b/fs/autofs4/init.c index c038727b405..cddc74b9cdb 100644 --- a/fs/autofs4/init.c +++ b/fs/autofs4/init.c @@ -31,11 +31,11 @@ static int __init init_autofs4_fs(void) { int err; + autofs_dev_ioctl_init(); + err = register_filesystem(&autofs_fs_type); if (err) - return err; - - autofs_dev_ioctl_init(); + autofs_dev_ioctl_exit(); return err; } diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c index 06858d95512..d8dc002e9cc 100644 --- a/fs/autofs4/inode.c +++ b/fs/autofs4/inode.c @@ -247,12 +247,9 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent) if (!ino) goto fail_free; root_inode = autofs4_get_inode(s, S_IFDIR | 0755); - if (!root_inode) - goto fail_ino; - - root = d_alloc_root(root_inode); + root = d_make_root(root_inode); if (!root) - goto fail_iput; + goto fail_ino; pipe = NULL; root->d_fsdata = ino; @@ -317,9 +314,6 @@ fail_fput: fail_dput: dput(root); goto fail_free; -fail_iput: - printk("autofs: get root dentry failed\n"); - iput(root_inode); fail_ino: kfree(ino); fail_free: diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c index 6e6d536767f..e18da23d42b 100644 --- a/fs/befs/linuxvfs.c +++ b/fs/befs/linuxvfs.c @@ -852,9 +852,8 @@ befs_fill_super(struct super_block *sb, void *data, int silent) ret = PTR_ERR(root); goto unacquire_priv_sbp; } - sb->s_root = d_alloc_root(root); + sb->s_root = d_make_root(root); if (!sb->s_root) { - iput(root); befs_error(sb, "get root inode failed"); goto unacquire_priv_sbp; } diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c index b0391bc402b..e23dc7c8b88 100644 --- a/fs/bfs/inode.c +++ b/fs/bfs/inode.c @@ -367,9 +367,8 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent) ret = PTR_ERR(inode); goto out2; } - s->s_root = d_alloc_root(inode); + s->s_root = d_make_root(inode); if (!s->s_root) { - iput(inode); ret = -ENOMEM; goto out2; } diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c index 1ff94054d35..4d5e6d26578 100644 --- a/fs/binfmt_aout.c +++ b/fs/binfmt_aout.c @@ -267,7 +267,6 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs) } install_exec_creds(bprm); - current->flags &= ~PF_FORKNOEXEC; if (N_MAGIC(ex) == OMAGIC) { unsigned long text_addr, map_size; @@ -454,7 +453,8 @@ out: static int __init init_aout_binfmt(void) { - return register_binfmt(&aout_format); + register_binfmt(&aout_format); + return 0; } static void __exit exit_aout_binfmt(void) diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 07d096c4992..81878b78c9d 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -712,7 +712,6 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs) goto out_free_dentry; /* OK, This is the point of no return */ - current->flags &= ~PF_FORKNOEXEC; current->mm->def_flags = def_flags; /* Do this immediately, since STACK_TOP as used in setup_arg_pages @@ -934,7 +933,6 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs) #endif /* ARCH_HAS_SETUP_ADDITIONAL_PAGES */ install_exec_creds(bprm); - current->flags &= ~PF_FORKNOEXEC; retval = create_elf_tables(bprm, &loc->elf_ex, load_addr, interp_load_addr); if (retval < 0) { @@ -2077,7 +2075,8 @@ out: static int __init init_elf_binfmt(void) { - return register_binfmt(&elf_format); + register_binfmt(&elf_format); + return 0; } static void __exit exit_elf_binfmt(void) diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c index 30745f459fa..c64bf5ee2df 100644 --- a/fs/binfmt_elf_fdpic.c +++ b/fs/binfmt_elf_fdpic.c @@ -91,7 +91,8 @@ static struct linux_binfmt elf_fdpic_format = { static int __init init_elf_fdpic_binfmt(void) { - return register_binfmt(&elf_fdpic_format); + register_binfmt(&elf_fdpic_format); + return 0; } static void __exit exit_elf_fdpic_binfmt(void) @@ -334,8 +335,6 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, current->mm->context.exec_fdpic_loadmap = 0; current->mm->context.interp_fdpic_loadmap = 0; - current->flags &= ~PF_FORKNOEXEC; - #ifdef CONFIG_MMU elf_fdpic_arch_lay_out_mm(&exec_params, &interp_params, @@ -413,7 +412,6 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, #endif install_exec_creds(bprm); - current->flags &= ~PF_FORKNOEXEC; if (create_elf_fdpic_tables(bprm, current->mm, &exec_params, &interp_params) < 0) goto error_kill; diff --git a/fs/binfmt_em86.c b/fs/binfmt_em86.c index b8e8b0acf9b..2790c7e1912 100644 --- a/fs/binfmt_em86.c +++ b/fs/binfmt_em86.c @@ -100,7 +100,8 @@ static struct linux_binfmt em86_format = { static int __init init_em86_binfmt(void) { - return register_binfmt(&em86_format); + register_binfmt(&em86_format); + return 0; } static void __exit exit_em86_binfmt(void) diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c index 1bffbe0ed77..04f61f0bdfd 100644 --- a/fs/binfmt_flat.c +++ b/fs/binfmt_flat.c @@ -902,7 +902,6 @@ static int load_flat_binary(struct linux_binprm * bprm, struct pt_regs * regs) libinfo.lib_list[j].start_data:UNLOADED_LIB; install_exec_creds(bprm); - current->flags &= ~PF_FORKNOEXEC; set_binfmt(&flat_format); @@ -950,7 +949,8 @@ static int load_flat_binary(struct linux_binprm * bprm, struct pt_regs * regs) static int __init init_flat_binfmt(void) { - return register_binfmt(&flat_format); + register_binfmt(&flat_format); + return 0; } /****************************************************************************/ diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c index a9198dfd5f8..1ffb60355ca 100644 --- a/fs/binfmt_misc.c +++ b/fs/binfmt_misc.c @@ -726,11 +726,8 @@ static struct file_system_type bm_fs_type = { static int __init init_misc_binfmt(void) { int err = register_filesystem(&bm_fs_type); - if (!err) { - err = insert_binfmt(&misc_format); - if (err) - unregister_filesystem(&bm_fs_type); - } + if (!err) + insert_binfmt(&misc_format); return err; } diff --git a/fs/binfmt_script.c b/fs/binfmt_script.c index 396a9884591..d3b8c1f6315 100644 --- a/fs/binfmt_script.c +++ b/fs/binfmt_script.c @@ -105,7 +105,8 @@ static struct linux_binfmt script_format = { static int __init init_script_binfmt(void) { - return register_binfmt(&script_format); + register_binfmt(&script_format); + return 0; } static void __exit exit_script_binfmt(void) diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c index cc8560f6c9b..e4fc746629a 100644 --- a/fs/binfmt_som.c +++ b/fs/binfmt_som.c @@ -225,7 +225,6 @@ load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs) goto out_free; /* OK, This is the point of no return */ - current->flags &= ~PF_FORKNOEXEC; current->personality = PER_HPUX; setup_new_exec(bprm); @@ -289,7 +288,8 @@ static int load_som_library(struct file *f) static int __init init_som_binfmt(void) { - return register_binfmt(&som_format); + register_binfmt(&som_format); + return 0; } static void __exit exit_som_binfmt(void) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 3ce97b217cb..81df3fec6a6 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -629,7 +629,6 @@ static int btrfs_fill_super(struct super_block *sb, void *data, int silent) { struct inode *inode; - struct dentry *root_dentry; struct btrfs_fs_info *fs_info = btrfs_sb(sb); struct btrfs_key key; int err; @@ -660,15 +659,12 @@ static int btrfs_fill_super(struct super_block *sb, goto fail_close; } - root_dentry = d_alloc_root(inode); - if (!root_dentry) { - iput(inode); + sb->s_root = d_make_root(inode); + if (!sb->s_root) { err = -ENOMEM; goto fail_close; } - sb->s_root = root_dentry; - save_mount_options(sb, data); cleancache_init_fs(sb); sb->s_flags |= MS_ACTIVE; diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c index a0358c2189c..7f0771d3894 100644 --- a/fs/cachefiles/namei.c +++ b/fs/cachefiles/namei.c @@ -646,7 +646,8 @@ lookup_again: * (this is used to keep track of culling, and atimes are only * updated by read, write and readdir but not lookup or * open) */ - touch_atime(cache->mnt, next); + path.dentry = next; + touch_atime(&path); } /* open a file interface onto a data file */ diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 00de2c9568c..256f8522192 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -655,9 +655,8 @@ static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, dout("open_root_inode success\n"); if (ceph_ino(inode) == CEPH_INO_ROOT && fsc->sb->s_root == NULL) { - root = d_alloc_root(inode); + root = d_make_root(inode); if (!root) { - iput(inode); root = ERR_PTR(-ENOMEM); goto out; } diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index b1fd382d195..418fc42fb8b 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -119,12 +119,10 @@ cifs_read_super(struct super_block *sb) if (IS_ERR(inode)) { rc = PTR_ERR(inode); - inode = NULL; goto out_no_root; } - sb->s_root = d_alloc_root(inode); - + sb->s_root = d_make_root(inode); if (!sb->s_root) { rc = -ENOMEM; goto out_no_root; @@ -147,9 +145,6 @@ cifs_read_super(struct super_block *sb) out_no_root: cERROR(1, "cifs_read_super: get root inode failed"); - if (inode) - iput(inode); - return rc; } diff --git a/fs/coda/inode.c b/fs/coda/inode.c index 5e2e1b3f068..05156c17b55 100644 --- a/fs/coda/inode.c +++ b/fs/coda/inode.c @@ -208,13 +208,12 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent) if (IS_ERR(root)) { error = PTR_ERR(root); printk("Failure of coda_cnode_make for root: error %d\n", error); - root = NULL; goto error; } printk("coda_read_super: rootinode is %ld dev %s\n", root->i_ino, root->i_sb->s_id); - sb->s_root = d_alloc_root(root); + sb->s_root = d_make_root(root); if (!sb->s_root) { error = -EINVAL; goto error; @@ -222,9 +221,6 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent) return 0; error: - if (root) - iput(root); - mutex_lock(&vc->vc_mutex); bdi_destroy(&vc->bdi); vc->vc_sb = NULL; diff --git a/fs/configfs/configfs_internal.h b/fs/configfs/configfs_internal.h index ede857d20a0..b5f0a3b91f1 100644 --- a/fs/configfs/configfs_internal.h +++ b/fs/configfs/configfs_internal.h @@ -58,12 +58,11 @@ struct configfs_dirent { extern struct mutex configfs_symlink_mutex; extern spinlock_t configfs_dirent_lock; -extern struct vfsmount * configfs_mount; extern struct kmem_cache *configfs_dir_cachep; extern int configfs_is_root(struct config_item *item); -extern struct inode * configfs_new_inode(umode_t mode, struct configfs_dirent *); +extern struct inode * configfs_new_inode(umode_t mode, struct configfs_dirent *, struct super_block *); extern int configfs_create(struct dentry *, umode_t mode, int (*init)(struct inode *)); extern int configfs_inode_init(void); extern void configfs_inode_exit(void); @@ -80,15 +79,15 @@ extern const unsigned char * configfs_get_name(struct configfs_dirent *sd); extern void configfs_drop_dentry(struct configfs_dirent *sd, struct dentry *parent); extern int configfs_setattr(struct dentry *dentry, struct iattr *iattr); -extern int configfs_pin_fs(void); +extern struct dentry *configfs_pin_fs(void); extern void configfs_release_fs(void); extern struct rw_semaphore configfs_rename_sem; -extern struct super_block * configfs_sb; extern const struct file_operations configfs_dir_operations; extern const struct file_operations configfs_file_operations; extern const struct file_operations bin_fops; extern const struct inode_operations configfs_dir_inode_operations; +extern const struct inode_operations configfs_root_inode_operations; extern const struct inode_operations configfs_symlink_inode_operations; extern const struct dentry_operations configfs_dentry_ops; diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c index 5ddd7ebd9dc..7e6c52d8a20 100644 --- a/fs/configfs/dir.c +++ b/fs/configfs/dir.c @@ -264,11 +264,13 @@ static int init_symlink(struct inode * inode) return 0; } -static int create_dir(struct config_item * k, struct dentry * p, - struct dentry * d) +static int create_dir(struct config_item *k, struct dentry *d) { int error; umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO; + struct dentry *p = d->d_parent; + + BUG_ON(!k); error = configfs_dirent_exists(p->d_fsdata, d->d_name.name); if (!error) @@ -304,19 +306,7 @@ static int create_dir(struct config_item * k, struct dentry * p, static int configfs_create_dir(struct config_item * item, struct dentry *dentry) { - struct dentry * parent; - int error = 0; - - BUG_ON(!item); - - if (item->ci_parent) - parent = item->ci_parent->ci_dentry; - else if (configfs_mount) - parent = configfs_mount->mnt_root; - else - return -EFAULT; - - error = create_dir(item,parent,dentry); + int error = create_dir(item, dentry); if (!error) item->ci_dentry = dentry; return error; @@ -1079,23 +1069,24 @@ int configfs_depend_item(struct configfs_subsystem *subsys, int ret; struct configfs_dirent *p, *root_sd, *subsys_sd = NULL; struct config_item *s_item = &subsys->su_group.cg_item; + struct dentry *root; /* * Pin the configfs filesystem. This means we can safely access * the root of the configfs filesystem. */ - ret = configfs_pin_fs(); - if (ret) - return ret; + root = configfs_pin_fs(); + if (IS_ERR(root)) + return PTR_ERR(root); /* * Next, lock the root directory. We're going to check that the * subsystem is really registered, and so we need to lock out * configfs_[un]register_subsystem(). */ - mutex_lock(&configfs_sb->s_root->d_inode->i_mutex); + mutex_lock(&root->d_inode->i_mutex); - root_sd = configfs_sb->s_root->d_fsdata; + root_sd = root->d_fsdata; list_for_each_entry(p, &root_sd->s_children, s_sibling) { if (p->s_type & CONFIGFS_DIR) { @@ -1129,7 +1120,7 @@ int configfs_depend_item(struct configfs_subsystem *subsys, out_unlock_dirent_lock: spin_unlock(&configfs_dirent_lock); out_unlock_fs: - mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex); + mutex_unlock(&root->d_inode->i_mutex); /* * If we succeeded, the fs is pinned via other methods. If not, @@ -1183,11 +1174,6 @@ static int configfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode struct module *subsys_owner = NULL, *new_item_owner = NULL; char *name; - if (dentry->d_parent == configfs_sb->s_root) { - ret = -EPERM; - goto out; - } - sd = dentry->d_parent->d_fsdata; /* @@ -1359,9 +1345,6 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry) struct module *subsys_owner = NULL, *dead_item_owner = NULL; int ret; - if (dentry->d_parent == configfs_sb->s_root) - return -EPERM; - sd = dentry->d_fsdata; if (sd->s_type & CONFIGFS_USET_DEFAULT) return -EPERM; @@ -1459,6 +1442,11 @@ const struct inode_operations configfs_dir_inode_operations = { .setattr = configfs_setattr, }; +const struct inode_operations configfs_root_inode_operations = { + .lookup = configfs_lookup, + .setattr = configfs_setattr, +}; + #if 0 int configfs_rename_dir(struct config_item * item, const char *new_name) { @@ -1546,6 +1534,7 @@ static inline unsigned char dt_type(struct configfs_dirent *sd) static int configfs_readdir(struct file * filp, void * dirent, filldir_t filldir) { struct dentry *dentry = filp->f_path.dentry; + struct super_block *sb = dentry->d_sb; struct configfs_dirent * parent_sd = dentry->d_fsdata; struct configfs_dirent *cursor = filp->private_data; struct list_head *p, *q = &cursor->s_sibling; @@ -1608,7 +1597,7 @@ static int configfs_readdir(struct file * filp, void * dirent, filldir_t filldir ino = inode->i_ino; spin_unlock(&configfs_dirent_lock); if (!inode) - ino = iunique(configfs_sb, 2); + ino = iunique(sb, 2); if (filldir(dirent, name, len, filp->f_pos, ino, dt_type(next)) < 0) @@ -1680,27 +1669,27 @@ int configfs_register_subsystem(struct configfs_subsystem *subsys) struct config_group *group = &subsys->su_group; struct qstr name; struct dentry *dentry; + struct dentry *root; struct configfs_dirent *sd; - err = configfs_pin_fs(); - if (err) - return err; + root = configfs_pin_fs(); + if (IS_ERR(root)) + return PTR_ERR(root); if (!group->cg_item.ci_name) group->cg_item.ci_name = group->cg_item.ci_namebuf; - sd = configfs_sb->s_root->d_fsdata; + sd = root->d_fsdata; link_group(to_config_group(sd->s_element), group); - mutex_lock_nested(&configfs_sb->s_root->d_inode->i_mutex, - I_MUTEX_PARENT); + mutex_lock_nested(&root->d_inode->i_mutex, I_MUTEX_PARENT); name.name = group->cg_item.ci_name; name.len = strlen(name.name); name.hash = full_name_hash(name.name, name.len); err = -ENOMEM; - dentry = d_alloc(configfs_sb->s_root, &name); + dentry = d_alloc(root, &name); if (dentry) { d_add(dentry, NULL); @@ -1717,7 +1706,7 @@ int configfs_register_subsystem(struct configfs_subsystem *subsys) } } - mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex); + mutex_unlock(&root->d_inode->i_mutex); if (err) { unlink_group(group); @@ -1731,13 +1720,14 @@ void configfs_unregister_subsystem(struct configfs_subsystem *subsys) { struct config_group *group = &subsys->su_group; struct dentry *dentry = group->cg_item.ci_dentry; + struct dentry *root = dentry->d_sb->s_root; - if (dentry->d_parent != configfs_sb->s_root) { + if (dentry->d_parent != root) { printk(KERN_ERR "configfs: Tried to unregister non-subsystem!\n"); return; } - mutex_lock_nested(&configfs_sb->s_root->d_inode->i_mutex, + mutex_lock_nested(&root->d_inode->i_mutex, I_MUTEX_PARENT); mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD); mutex_lock(&configfs_symlink_mutex); @@ -1754,7 +1744,7 @@ void configfs_unregister_subsystem(struct configfs_subsystem *subsys) d_delete(dentry); - mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex); + mutex_unlock(&root->d_inode->i_mutex); dput(dentry); diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c index 3ee36d41886..0074362d9f7 100644 --- a/fs/configfs/inode.c +++ b/fs/configfs/inode.c @@ -44,8 +44,6 @@ static struct lock_class_key default_group_class[MAX_LOCK_DEPTH]; #endif -extern struct super_block * configfs_sb; - static const struct address_space_operations configfs_aops = { .readpage = simple_readpage, .write_begin = simple_write_begin, @@ -132,9 +130,10 @@ static inline void set_inode_attr(struct inode * inode, struct iattr * iattr) inode->i_ctime = iattr->ia_ctime; } -struct inode *configfs_new_inode(umode_t mode, struct configfs_dirent * sd) +struct inode *configfs_new_inode(umode_t mode, struct configfs_dirent *sd, + struct super_block *s) { - struct inode * inode = new_inode(configfs_sb); + struct inode * inode = new_inode(s); if (inode) { inode->i_ino = get_next_ino(); inode->i_mapping->a_ops = &configfs_aops; @@ -188,36 +187,35 @@ static void configfs_set_inode_lock_class(struct configfs_dirent *sd, int configfs_create(struct dentry * dentry, umode_t mode, int (*init)(struct inode *)) { int error = 0; - struct inode * inode = NULL; - if (dentry) { - if (!dentry->d_inode) { - struct configfs_dirent *sd = dentry->d_fsdata; - if ((inode = configfs_new_inode(mode, sd))) { - if (dentry->d_parent && dentry->d_parent->d_inode) { - struct inode *p_inode = dentry->d_parent->d_inode; - p_inode->i_mtime = p_inode->i_ctime = CURRENT_TIME; - } - configfs_set_inode_lock_class(sd, inode); - goto Proceed; - } - else - error = -ENOMEM; - } else - error = -EEXIST; - } else - error = -ENOENT; - goto Done; + struct inode *inode = NULL; + struct configfs_dirent *sd; + struct inode *p_inode; + + if (!dentry) + return -ENOENT; + + if (dentry->d_inode) + return -EEXIST; - Proceed: - if (init) + sd = dentry->d_fsdata; + inode = configfs_new_inode(mode, sd, dentry->d_sb); + if (!inode) + return -ENOMEM; + + p_inode = dentry->d_parent->d_inode; + p_inode->i_mtime = p_inode->i_ctime = CURRENT_TIME; + configfs_set_inode_lock_class(sd, inode); + + if (init) { error = init(inode); - if (!error) { - d_instantiate(dentry, inode); - if (S_ISDIR(mode) || S_ISLNK(mode)) - dget(dentry); /* pin link and directory dentries in core */ - } else - iput(inode); - Done: + if (error) { + iput(inode); + return error; + } + } + d_instantiate(dentry, inode); + if (S_ISDIR(mode) || S_ISLNK(mode)) + dget(dentry); /* pin link and directory dentries in core */ return error; } diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c index 276e15cafd5..aee0a7ebbd8 100644 --- a/fs/configfs/mount.c +++ b/fs/configfs/mount.c @@ -37,8 +37,7 @@ /* Random magic number */ #define CONFIGFS_MAGIC 0x62656570 -struct vfsmount * configfs_mount = NULL; -struct super_block * configfs_sb = NULL; +static struct vfsmount *configfs_mount = NULL; struct kmem_cache *configfs_dir_cachep; static int configfs_mnt_count = 0; @@ -77,12 +76,11 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_magic = CONFIGFS_MAGIC; sb->s_op = &configfs_ops; sb->s_time_gran = 1; - configfs_sb = sb; inode = configfs_new_inode(S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO, - &configfs_root); + &configfs_root, sb); if (inode) { - inode->i_op = &configfs_dir_inode_operations; + inode->i_op = &configfs_root_inode_operations; inode->i_fop = &configfs_dir_operations; /* directory inodes start off with i_nlink == 2 (for "." entry) */ inc_nlink(inode); @@ -91,10 +89,9 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent) return -ENOMEM; } - root = d_alloc_root(inode); + root = d_make_root(inode); if (!root) { pr_debug("%s: could not get root dentry!\n",__func__); - iput(inode); return -ENOMEM; } config_group_init(&configfs_root_group); @@ -118,10 +115,11 @@ static struct file_system_type configfs_fs_type = { .kill_sb = kill_litter_super, }; -int configfs_pin_fs(void) +struct dentry *configfs_pin_fs(void) { - return simple_pin_fs(&configfs_fs_type, &configfs_mount, + int err = simple_pin_fs(&configfs_fs_type, &configfs_mount, &configfs_mnt_count); + return err ? ERR_PTR(err) : configfs_mount->mnt_root; } void configfs_release_fs(void) diff --git a/fs/configfs/symlink.c b/fs/configfs/symlink.c index 0f3eb41d920..cc9f2546ea4 100644 --- a/fs/configfs/symlink.c +++ b/fs/configfs/symlink.c @@ -110,13 +110,13 @@ out: static int get_target(const char *symname, struct path *path, - struct config_item **target) + struct config_item **target, struct super_block *sb) { int ret; ret = kern_path(symname, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, path); if (!ret) { - if (path->dentry->d_sb == configfs_sb) { + if (path->dentry->d_sb == sb) { *target = configfs_get_config_item(path->dentry); if (!*target) { ret = -ENOENT; @@ -141,10 +141,6 @@ int configfs_symlink(struct inode *dir, struct dentry *dentry, const char *symna struct config_item *target_item = NULL; struct config_item_type *type; - ret = -EPERM; /* What lack-of-symlink returns */ - if (dentry->d_parent == configfs_sb->s_root) - goto out; - sd = dentry->d_parent->d_fsdata; /* * Fake invisibility if dir belongs to a group/default groups hierarchy @@ -162,7 +158,7 @@ int configfs_symlink(struct inode *dir, struct dentry *dentry, const char *symna !type->ct_item_ops->allow_link) goto out_put; - ret = get_target(symname, &path, &target_item); + ret = get_target(symname, &path, &target_item, dentry->d_sb); if (ret) goto out_put; @@ -198,8 +194,6 @@ int configfs_unlink(struct inode *dir, struct dentry *dentry) if (!(sd->s_type & CONFIGFS_ITEM_LINK)) goto out; - BUG_ON(dentry->d_parent == configfs_sb->s_root); - sl = sd->s_element; parent_item = configfs_get_config_item(dentry->d_parent); diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c index 04d51f9333d..d013c46402e 100644 --- a/fs/cramfs/inode.c +++ b/fs/cramfs/inode.c @@ -318,11 +318,9 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent) root = get_cramfs_inode(sb, &super.root, 0); if (IS_ERR(root)) goto out; - sb->s_root = d_alloc_root(root); - if (!sb->s_root) { - iput(root); + sb->s_root = d_make_root(root); + if (!sb->s_root) goto out; - } return 0; out: kfree(sbi); diff --git a/fs/dcache.c b/fs/dcache.c index 11828de68dc..e441941c834 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1466,30 +1466,6 @@ struct dentry *d_instantiate_unique(struct dentry *entry, struct inode *inode) EXPORT_SYMBOL(d_instantiate_unique); -/** - * d_alloc_root - allocate root dentry - * @root_inode: inode to allocate the root for - * - * Allocate a root ("/") dentry for the inode given. The inode is - * instantiated and returned. %NULL is returned if there is insufficient - * memory or the inode passed is %NULL. - */ - -struct dentry * d_alloc_root(struct inode * root_inode) -{ - struct dentry *res = NULL; - - if (root_inode) { - static const struct qstr name = { .name = "/", .len = 1 }; - - res = __d_alloc(root_inode->i_sb, &name); - if (res) - d_instantiate(res, root_inode); - } - return res; -} -EXPORT_SYMBOL(d_alloc_root); - struct dentry *d_make_root(struct inode *root_inode) { struct dentry *res = NULL; diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c index ef023eef046..21e93605161 100644 --- a/fs/debugfs/file.c +++ b/fs/debugfs/file.c @@ -611,7 +611,7 @@ static const struct file_operations fops_regset32 = { * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling * code. */ -struct dentry *debugfs_create_regset32(const char *name, mode_t mode, +struct dentry *debugfs_create_regset32(const char *name, umode_t mode, struct dentry *parent, struct debugfs_regset32 *regset) { diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c index 1c6f908e38c..10f5e0b484d 100644 --- a/fs/devpts/inode.c +++ b/fs/devpts/inode.c @@ -374,12 +374,11 @@ devpts_fill_super(struct super_block *s, void *data, int silent) inode->i_fop = &simple_dir_operations; set_nlink(inode, 2); - s->s_root = d_alloc_root(inode); + s->s_root = d_make_root(inode); if (s->s_root) return 0; printk(KERN_ERR "devpts: get root dentry failed\n"); - iput(inode); fail: return -ENOMEM; diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c index d3f95f941c4..2b17f2f9b12 100644 --- a/fs/ecryptfs/file.c +++ b/fs/ecryptfs/file.c @@ -48,8 +48,7 @@ static ssize_t ecryptfs_read_update_atime(struct kiocb *iocb, unsigned long nr_segs, loff_t pos) { ssize_t rc; - struct dentry *lower_dentry; - struct vfsmount *lower_vfsmount; + struct path lower; struct file *file = iocb->ki_filp; rc = generic_file_aio_read(iocb, iov, nr_segs, pos); @@ -60,9 +59,9 @@ static ssize_t ecryptfs_read_update_atime(struct kiocb *iocb, if (-EIOCBQUEUED == rc) rc = wait_on_sync_kiocb(iocb); if (rc >= 0) { - lower_dentry = ecryptfs_dentry_to_lower(file->f_path.dentry); - lower_vfsmount = ecryptfs_dentry_to_lower_mnt(file->f_path.dentry); - touch_atime(lower_vfsmount, lower_dentry); + lower.dentry = ecryptfs_dentry_to_lower(file->f_path.dentry); + lower.mnt = ecryptfs_dentry_to_lower_mnt(file->f_path.dentry); + touch_atime(&lower); } return rc; } diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c index b4a6befb121..68954937a07 100644 --- a/fs/ecryptfs/main.c +++ b/fs/ecryptfs/main.c @@ -550,9 +550,8 @@ static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags if (IS_ERR(inode)) goto out_free; - s->s_root = d_alloc_root(inode); + s->s_root = d_make_root(inode); if (!s->s_root) { - iput(inode); rc = -ENOMEM; goto out_free; } @@ -795,15 +794,10 @@ static int __init ecryptfs_init(void) "Failed to allocate one or more kmem_cache objects\n"); goto out; } - rc = register_filesystem(&ecryptfs_fs_type); - if (rc) { - printk(KERN_ERR "Failed to register filesystem\n"); - goto out_free_kmem_caches; - } rc = do_sysfs_registration(); if (rc) { printk(KERN_ERR "sysfs registration failed\n"); - goto out_unregister_filesystem; + goto out_free_kmem_caches; } rc = ecryptfs_init_kthread(); if (rc) { @@ -824,19 +818,24 @@ static int __init ecryptfs_init(void) "rc = [%d]\n", rc); goto out_release_messaging; } + rc = register_filesystem(&ecryptfs_fs_type); + if (rc) { + printk(KERN_ERR "Failed to register filesystem\n"); + goto out_destroy_crypto; + } if (ecryptfs_verbosity > 0) printk(KERN_CRIT "eCryptfs verbosity set to %d. Secret values " "will be written to the syslog!\n", ecryptfs_verbosity); goto out; +out_destroy_crypto: + ecryptfs_destroy_crypto(); out_release_messaging: ecryptfs_release_messaging(); out_destroy_kthread: ecryptfs_destroy_kthread(); out_do_sysfs_unregistration: do_sysfs_unregistration(); -out_unregister_filesystem: - unregister_filesystem(&ecryptfs_fs_type); out_free_kmem_caches: ecryptfs_free_kmem_caches(); out: diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c index cf152823bbf..2dd946b636d 100644 --- a/fs/ecryptfs/super.c +++ b/fs/ecryptfs/super.c @@ -184,7 +184,6 @@ static int ecryptfs_show_options(struct seq_file *m, struct dentry *root) const struct super_operations ecryptfs_sops = { .alloc_inode = ecryptfs_alloc_inode, .destroy_inode = ecryptfs_destroy_inode, - .drop_inode = generic_drop_inode, .statfs = ecryptfs_statfs, .remount_fs = NULL, .evict_inode = ecryptfs_evict_inode, diff --git a/fs/efs/super.c b/fs/efs/super.c index 981106429a9..e755ec746c6 100644 --- a/fs/efs/super.c +++ b/fs/efs/super.c @@ -317,10 +317,9 @@ static int efs_fill_super(struct super_block *s, void *d, int silent) goto out_no_fs; } - s->s_root = d_alloc_root(root); + s->s_root = d_make_root(root); if (!(s->s_root)) { printk(KERN_ERR "EFS: get root dentry failed\n"); - iput(root); ret = -ENOMEM; goto out_no_fs; } diff --git a/fs/exec.c b/fs/exec.c index 3908544f5d1..0b931471d4f 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -81,15 +81,13 @@ static atomic_t call_count = ATOMIC_INIT(1); static LIST_HEAD(formats); static DEFINE_RWLOCK(binfmt_lock); -int __register_binfmt(struct linux_binfmt * fmt, int insert) +void __register_binfmt(struct linux_binfmt * fmt, int insert) { - if (!fmt) - return -EINVAL; + BUG_ON(!fmt); write_lock(&binfmt_lock); insert ? list_add(&fmt->lh, &formats) : list_add_tail(&fmt->lh, &formats); write_unlock(&binfmt_lock); - return 0; } EXPORT_SYMBOL(__register_binfmt); @@ -1115,7 +1113,7 @@ int flush_old_exec(struct linux_binprm * bprm) bprm->mm = NULL; /* We're using it now */ set_fs(USER_DS); - current->flags &= ~(PF_RANDOMIZE | PF_KTHREAD); + current->flags &= ~(PF_RANDOMIZE | PF_FORKNOEXEC | PF_KTHREAD); flush_thread(); current->personality &= ~bprm->per_clear; diff --git a/fs/exofs/namei.c b/fs/exofs/namei.c index 9dbf0c30103..fc7161d6bf6 100644 --- a/fs/exofs/namei.c +++ b/fs/exofs/namei.c @@ -143,9 +143,6 @@ static int exofs_link(struct dentry *old_dentry, struct inode *dir, { struct inode *inode = old_dentry->d_inode; - if (inode->i_nlink >= EXOFS_LINK_MAX) - return -EMLINK; - inode->i_ctime = CURRENT_TIME; inode_inc_link_count(inode); ihold(inode); @@ -156,10 +153,7 @@ static int exofs_link(struct dentry *old_dentry, struct inode *dir, static int exofs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) { struct inode *inode; - int err = -EMLINK; - - if (dir->i_nlink >= EXOFS_LINK_MAX) - goto out; + int err; inode_inc_link_count(dir); @@ -275,11 +269,6 @@ static int exofs_rename(struct inode *old_dir, struct dentry *old_dentry, if (err) goto out_dir; } else { - if (dir_de) { - err = -EMLINK; - if (new_dir->i_nlink >= EXOFS_LINK_MAX) - goto out_dir; - } err = exofs_add_link(new_dentry, old_inode); if (err) goto out_dir; diff --git a/fs/exofs/super.c b/fs/exofs/super.c index d22cd168c6e..7f2b590a36b 100644 --- a/fs/exofs/super.c +++ b/fs/exofs/super.c @@ -754,6 +754,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent) sb->s_blocksize = EXOFS_BLKSIZE; sb->s_blocksize_bits = EXOFS_BLKSHIFT; sb->s_maxbytes = MAX_LFS_FILESIZE; + sb->s_max_links = EXOFS_LINK_MAX; atomic_set(&sbi->s_curr_pending, 0); sb->s_bdev = NULL; sb->s_dev = 0; @@ -818,9 +819,8 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent) ret = PTR_ERR(root); goto free_sbi; } - sb->s_root = d_alloc_root(root); + sb->s_root = d_make_root(root); if (!sb->s_root) { - iput(root); EXOFS_ERR("ERROR: get root inode failed\n"); ret = -ENOMEM; goto free_sbi; diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c index 080419814ba..dffb8653628 100644 --- a/fs/ext2/namei.c +++ b/fs/ext2/namei.c @@ -195,9 +195,6 @@ static int ext2_link (struct dentry * old_dentry, struct inode * dir, struct inode *inode = old_dentry->d_inode; int err; - if (inode->i_nlink >= EXT2_LINK_MAX) - return -EMLINK; - dquot_initialize(dir); inode->i_ctime = CURRENT_TIME_SEC; @@ -217,10 +214,7 @@ static int ext2_link (struct dentry * old_dentry, struct inode * dir, static int ext2_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode) { struct inode * inode; - int err = -EMLINK; - - if (dir->i_nlink >= EXT2_LINK_MAX) - goto out; + int err; dquot_initialize(dir); @@ -346,11 +340,6 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry, drop_nlink(new_inode); inode_dec_link_count(new_inode); } else { - if (dir_de) { - err = -EMLINK; - if (new_dir->i_nlink >= EXT2_LINK_MAX) - goto out_dir; - } err = ext2_add_link(new_dentry, old_inode); if (err) goto out_dir; diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 0090595beb2..e1025c7a437 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -919,6 +919,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) } sb->s_maxbytes = ext2_max_size(sb->s_blocksize_bits); + sb->s_max_links = EXT2_LINK_MAX; if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV) { sbi->s_inode_size = EXT2_GOOD_OLD_INODE_SIZE; @@ -1087,9 +1088,8 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) goto failed_mount3; } - sb->s_root = d_alloc_root(root); + sb->s_root = d_make_root(root); if (!sb->s_root) { - iput(root); ext2_msg(sb, KERN_ERR, "error: get root inode failed"); ret = -ENOMEM; goto failed_mount3; diff --git a/fs/ext3/super.c b/fs/ext3/super.c index 726c7ef6cdf..e0b45b93327 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -2046,10 +2046,9 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent) ext3_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck"); goto failed_mount3; } - sb->s_root = d_alloc_root(root); + sb->s_root = d_make_root(root); if (!sb->s_root) { ext3_msg(sb, KERN_ERR, "error: get root dentry failed"); - iput(root); ret = -ENOMEM; goto failed_mount3; } diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 502c61fd739..933900909ed 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3735,9 +3735,8 @@ no_journal: iput(root); goto failed_mount4; } - sb->s_root = d_alloc_root(root); + sb->s_root = d_make_root(root); if (!sb->s_root) { - iput(root); ext4_msg(sb, KERN_ERR, "get root dentry failed"); ret = -ENOMEM; goto failed_mount4; @@ -5056,6 +5055,9 @@ static int __init ext4_init_fs(void) { int i, err; + ext4_li_info = NULL; + mutex_init(&ext4_li_mtx); + ext4_check_flag_values(); for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { @@ -5094,8 +5096,6 @@ static int __init ext4_init_fs(void) if (err) goto out; - ext4_li_info = NULL; - mutex_init(&ext4_li_mtx); return 0; out: unregister_as_ext2(); diff --git a/fs/fat/inode.c b/fs/fat/inode.c index 3ab841054d5..21687e31acc 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -1496,11 +1496,13 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat, root_inode->i_ino = MSDOS_ROOT_INO; root_inode->i_version = 1; error = fat_read_root(root_inode); - if (error < 0) + if (error < 0) { + iput(root_inode); goto out_fail; + } error = -ENOMEM; insert_inode_hash(root_inode); - sb->s_root = d_alloc_root(root_inode); + sb->s_root = d_make_root(root_inode); if (!sb->s_root) { fat_msg(sb, KERN_ERR, "get root inode failed"); goto out_fail; @@ -1516,8 +1518,6 @@ out_invalid: out_fail: if (fat_inode) iput(fat_inode); - if (root_inode) - iput(root_inode); unload_nls(sbi->nls_io); unload_nls(sbi->nls_disk); if (sbi->options.iocharset != fat_default_iocharset) diff --git a/fs/file_table.c b/fs/file_table.c index 20002e39754..70f2a0fd6ae 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -204,7 +204,7 @@ EXPORT_SYMBOL(alloc_file); * to write to @file, along with access to write through * its vfsmount. */ -void drop_file_write_access(struct file *file) +static void drop_file_write_access(struct file *file) { struct vfsmount *mnt = file->f_path.mnt; struct dentry *dentry = file->f_path.dentry; @@ -219,7 +219,6 @@ void drop_file_write_access(struct file *file) mnt_drop_write(mnt); file_release_write(file); } -EXPORT_SYMBOL_GPL(drop_file_write_access); /* the real guts of fput() - releasing the last reference to file */ diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c index 9d1c9955838..d4fabd26084 100644 --- a/fs/freevxfs/vxfs_super.c +++ b/fs/freevxfs/vxfs_super.c @@ -224,9 +224,8 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent) ret = PTR_ERR(root); goto out; } - sbp->s_root = d_alloc_root(root); + sbp->s_root = d_make_root(root); if (!sbp->s_root) { - iput(root); printk(KERN_WARNING "vxfs: unable to get root dentry.\n"); goto out_free_ilist; } diff --git a/fs/fs_struct.c b/fs/fs_struct.c index 78b519c1353..6324c427495 100644 --- a/fs/fs_struct.c +++ b/fs/fs_struct.c @@ -26,11 +26,11 @@ void set_fs_root(struct fs_struct *fs, struct path *path) { struct path old_root; + path_get_longterm(path); spin_lock(&fs->lock); write_seqcount_begin(&fs->seq); old_root = fs->root; fs->root = *path; - path_get_longterm(path); write_seqcount_end(&fs->seq); spin_unlock(&fs->lock); if (old_root.dentry) @@ -45,11 +45,11 @@ void set_fs_pwd(struct fs_struct *fs, struct path *path) { struct path old_pwd; + path_get_longterm(path); spin_lock(&fs->lock); write_seqcount_begin(&fs->seq); old_pwd = fs->pwd; fs->pwd = *path; - path_get_longterm(path); write_seqcount_end(&fs->seq); spin_unlock(&fs->lock); @@ -57,6 +57,14 @@ void set_fs_pwd(struct fs_struct *fs, struct path *path) path_put_longterm(&old_pwd); } +static inline int replace_path(struct path *p, const struct path *old, const struct path *new) +{ + if (likely(p->dentry != old->dentry || p->mnt != old->mnt)) + return 0; + *p = *new; + return 1; +} + void chroot_fs_refs(struct path *old_root, struct path *new_root) { struct task_struct *g, *p; @@ -68,21 +76,16 @@ void chroot_fs_refs(struct path *old_root, struct path *new_root) task_lock(p); fs = p->fs; if (fs) { + int hits = 0; spin_lock(&fs->lock); write_seqcount_begin(&fs->seq); - if (fs->root.dentry == old_root->dentry - && fs->root.mnt == old_root->mnt) { - path_get_longterm(new_root); - fs->root = *new_root; + hits += replace_path(&fs->root, old_root, new_root); + hits += replace_path(&fs->pwd, old_root, new_root); + write_seqcount_end(&fs->seq); + while (hits--) { count++; - } - if (fs->pwd.dentry == old_root->dentry - && fs->pwd.mnt == old_root->mnt) { path_get_longterm(new_root); - fs->pwd = *new_root; - count++; } - write_seqcount_end(&fs->seq); spin_unlock(&fs->lock); } task_unlock(p); @@ -107,10 +110,8 @@ void exit_fs(struct task_struct *tsk) int kill; task_lock(tsk); spin_lock(&fs->lock); - write_seqcount_begin(&fs->seq); tsk->fs = NULL; kill = !--fs->users; - write_seqcount_end(&fs->seq); spin_unlock(&fs->lock); task_unlock(tsk); if (kill) diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 64cf8d07393..4aec5995867 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -988,14 +988,9 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent) err = -ENOMEM; root = fuse_get_root_inode(sb, d.rootmode); - if (!root) + root_dentry = d_make_root(root); + if (!root_dentry) goto err_put_conn; - - root_dentry = d_alloc_root(root); - if (!root_dentry) { - iput(root); - goto err_put_conn; - } /* only now - we want root dentry with NULL ->d_op */ sb->s_d_op = &fuse_dentry_operations; diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c index 24f609c9ef9..10e848c6d1b 100644 --- a/fs/gfs2/ops_fstype.c +++ b/fs/gfs2/ops_fstype.c @@ -431,10 +431,9 @@ static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr, fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode)); return PTR_ERR(inode); } - dentry = d_alloc_root(inode); + dentry = d_make_root(inode); if (!dentry) { fs_err(sdp, "can't alloc %s dentry\n", name); - iput(inode); return -ENOMEM; } *dptr = dentry; diff --git a/fs/hfs/super.c b/fs/hfs/super.c index 8137fb3e678..7b4c537d6e1 100644 --- a/fs/hfs/super.c +++ b/fs/hfs/super.c @@ -430,15 +430,13 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_d_op = &hfs_dentry_operations; res = -ENOMEM; - sb->s_root = d_alloc_root(root_inode); + sb->s_root = d_make_root(root_inode); if (!sb->s_root) - goto bail_iput; + goto bail_no_root; /* everything's okay */ return 0; -bail_iput: - iput(root_inode); bail_no_root: printk(KERN_ERR "hfs: get root inode failed.\n"); bail: diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h index 21a5b7fc6db..4e75ac646fe 100644 --- a/fs/hfsplus/hfsplus_fs.h +++ b/fs/hfsplus/hfsplus_fs.h @@ -317,6 +317,11 @@ static inline unsigned short hfsplus_min_io_size(struct super_block *sb) /* + * hfs+-specific ioctl for making the filesystem bootable + */ +#define HFSPLUS_IOC_BLESS _IO('h', 0x80) + +/* * Functions in any *.c used in other files */ diff --git a/fs/hfsplus/hfsplus_raw.h b/fs/hfsplus/hfsplus_raw.h index 927cdd6d5bf..921967e5abb 100644 --- a/fs/hfsplus/hfsplus_raw.h +++ b/fs/hfsplus/hfsplus_raw.h @@ -117,7 +117,7 @@ struct hfsplus_vh { __be32 write_count; __be64 encodings_bmp; - u8 finder_info[32]; + u32 finder_info[8]; struct hfsplus_fork_raw alloc_file; struct hfsplus_fork_raw ext_file; diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c index 6643b242bdd..82b69ee4dac 100644 --- a/fs/hfsplus/inode.c +++ b/fs/hfsplus/inode.c @@ -193,6 +193,7 @@ static struct dentry *hfsplus_file_lookup(struct inode *dir, mutex_init(&hip->extents_lock); hip->extent_state = 0; hip->flags = 0; + hip->userflags = 0; set_bit(HFSPLUS_I_RSRC, &hip->flags); err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); @@ -400,6 +401,7 @@ struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode) atomic_set(&hip->opencnt, 0); hip->extent_state = 0; hip->flags = 0; + hip->userflags = 0; memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec)); memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); hip->alloc_blocks = 0; diff --git a/fs/hfsplus/ioctl.c b/fs/hfsplus/ioctl.c index f66c7655b3f..c640ba57074 100644 --- a/fs/hfsplus/ioctl.c +++ b/fs/hfsplus/ioctl.c @@ -20,6 +20,38 @@ #include <asm/uaccess.h> #include "hfsplus_fs.h" +/* + * "Blessing" an HFS+ filesystem writes metadata to the superblock informing + * the platform firmware which file to boot from + */ +static int hfsplus_ioctl_bless(struct file *file, int __user *user_flags) +{ + struct dentry *dentry = file->f_path.dentry; + struct inode *inode = dentry->d_inode; + struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); + struct hfsplus_vh *vh = sbi->s_vhdr; + struct hfsplus_vh *bvh = sbi->s_backup_vhdr; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + mutex_lock(&sbi->vh_mutex); + + /* Directory containing the bootable system */ + vh->finder_info[0] = bvh->finder_info[0] = + cpu_to_be32(parent_ino(dentry)); + + /* Bootloader */ + vh->finder_info[1] = bvh->finder_info[1] = cpu_to_be32(inode->i_ino); + + /* Per spec, the OS X system folder - same as finder_info[0] here */ + vh->finder_info[5] = bvh->finder_info[5] = + cpu_to_be32(parent_ino(dentry)); + + mutex_unlock(&sbi->vh_mutex); + return 0; +} + static int hfsplus_ioctl_getflags(struct file *file, int __user *user_flags) { struct inode *inode = file->f_path.dentry->d_inode; @@ -108,6 +140,8 @@ long hfsplus_ioctl(struct file *file, unsigned int cmd, unsigned long arg) return hfsplus_ioctl_getflags(file, argp); case HFSPLUS_IOC_EXT2_SETFLAGS: return hfsplus_ioctl_setflags(file, argp); + case HFSPLUS_IOC_BLESS: + return hfsplus_ioctl_bless(file, argp); default: return -ENOTTY; } diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c index 427682ca9e4..ceb1c281eef 100644 --- a/fs/hfsplus/super.c +++ b/fs/hfsplus/super.c @@ -465,6 +465,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) goto out_put_alloc_file; } + sb->s_d_op = &hfsplus_dentry_operations; + sb->s_root = d_make_root(root); + if (!sb->s_root) { + err = -ENOMEM; + goto out_put_alloc_file; + } + str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; str.name = HFSP_HIDDENDIR_NAME; err = hfs_find_init(sbi->cat_tree, &fd); @@ -515,13 +522,6 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) } } - sb->s_d_op = &hfsplus_dentry_operations; - sb->s_root = d_alloc_root(root); - if (!sb->s_root) { - err = -ENOMEM; - goto out_put_hidden_dir; - } - unload_nls(sbi->nls); sbi->nls = nls; return 0; @@ -529,7 +529,8 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) out_put_hidden_dir: iput(sbi->hidden_dir); out_put_root: - iput(root); + dput(sb->s_root); + sb->s_root = NULL; out_put_alloc_file: iput(sbi->alloc_file); out_close_cat_tree: diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c index e130bd46d67..588d45885a6 100644 --- a/fs/hostfs/hostfs_kern.c +++ b/fs/hostfs/hostfs_kern.c @@ -966,9 +966,9 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent) } err = -ENOMEM; - sb->s_root = d_alloc_root(root_inode); + sb->s_root = d_make_root(root_inode); if (sb->s_root == NULL) - goto out_put; + goto out; return 0; diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c index 3690467c944..54f6eccb79d 100644 --- a/fs/hpfs/super.c +++ b/fs/hpfs/super.c @@ -625,11 +625,9 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent) hpfs_init_inode(root); hpfs_read_inode(root); unlock_new_inode(root); - s->s_root = d_alloc_root(root); - if (!s->s_root) { - iput(root); + s->s_root = d_make_root(root); + if (!s->s_root) goto bail0; - } /* * find the root directory's . pointer & finish filling in the inode diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c index d92f4ce8092..a80e45a690a 100644 --- a/fs/hppfs/hppfs.c +++ b/fs/hppfs/hppfs.c @@ -726,17 +726,12 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent) err = -ENOMEM; root_inode = get_inode(sb, dget(proc_mnt->mnt_root)); - if (!root_inode) - goto out_mntput; - - sb->s_root = d_alloc_root(root_inode); + sb->s_root = d_make_root(root_inode); if (!sb->s_root) - goto out_iput; + goto out_mntput; return 0; - out_iput: - iput(root_inode); out_mntput: mntput(proc_mnt); out: diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 1e85a7ac021..81932fa1861 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -831,8 +831,6 @@ bad_val: static int hugetlbfs_fill_super(struct super_block *sb, void *data, int silent) { - struct inode * inode; - struct dentry * root; int ret; struct hugetlbfs_config config; struct hugetlbfs_sb_info *sbinfo; @@ -865,16 +863,9 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_magic = HUGETLBFS_MAGIC; sb->s_op = &hugetlbfs_ops; sb->s_time_gran = 1; - inode = hugetlbfs_get_root(sb, &config); - if (!inode) - goto out_free; - - root = d_alloc_root(inode); - if (!root) { - iput(inode); + sb->s_root = d_make_root(hugetlbfs_get_root(sb, &config)); + if (!sb->s_root) goto out_free; - } - sb->s_root = root; return 0; out_free: kfree(sbinfo); diff --git a/fs/inode.c b/fs/inode.c index 83ab215baab..9f4f5fecc09 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -2,29 +2,19 @@ * (C) 1997 Linus Torvalds * (C) 1999 Andrea Arcangeli <andrea@suse.de> (dynamic inode allocation) */ +#include <linux/export.h> #include <linux/fs.h> #include <linux/mm.h> -#include <linux/dcache.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/writeback.h> -#include <linux/module.h> #include <linux/backing-dev.h> -#include <linux/wait.h> -#include <linux/rwsem.h> #include <linux/hash.h> #include <linux/swap.h> #include <linux/security.h> -#include <linux/pagemap.h> #include <linux/cdev.h> #include <linux/bootmem.h> #include <linux/fsnotify.h> #include <linux/mount.h> -#include <linux/async.h> #include <linux/posix_acl.h> #include <linux/prefetch.h> -#include <linux/ima.h> -#include <linux/cred.h> #include <linux/buffer_head.h> /* for inode_has_buffers */ #include <linux/ratelimit.h> #include "internal.h" @@ -1369,17 +1359,6 @@ int generic_delete_inode(struct inode *inode) EXPORT_SYMBOL(generic_delete_inode); /* - * Normal UNIX filesystem behaviour: delete the - * inode when the usage count drops to zero, and - * i_nlink is zero. - */ -int generic_drop_inode(struct inode *inode) -{ - return !inode->i_nlink || inode_unhashed(inode); -} -EXPORT_SYMBOL_GPL(generic_drop_inode); - -/* * Called when we're dropping the last reference * to an inode. * @@ -1510,9 +1489,10 @@ static int relatime_need_update(struct vfsmount *mnt, struct inode *inode, * This function automatically handles read only file systems and media, * as well as the "noatime" flag and inode specific "noatime" markers. */ -void touch_atime(struct vfsmount *mnt, struct dentry *dentry) +void touch_atime(struct path *path) { - struct inode *inode = dentry->d_inode; + struct vfsmount *mnt = path->mnt; + struct inode *inode = path->dentry->d_inode; struct timespec now; if (inode->i_flags & S_NOATIME) diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c index bd62c76fb5d..29037c365ba 100644 --- a/fs/isofs/inode.c +++ b/fs/isofs/inode.c @@ -947,9 +947,8 @@ root_found: s->s_d_op = &isofs_dentry_ops[table]; /* get the root dentry */ - s->s_root = d_alloc_root(inode); + s->s_root = d_make_root(inode); if (!(s->s_root)) { - iput(inode); error = -ENOMEM; goto out_no_inode; } diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c index 2e0123867cb..c0d5c9d770d 100644 --- a/fs/jffs2/fs.c +++ b/fs/jffs2/fs.c @@ -561,9 +561,9 @@ int jffs2_do_fill_super(struct super_block *sb, void *data, int silent) ret = -ENOMEM; D1(printk(KERN_DEBUG "jffs2_do_fill_super(): d_alloc_root()\n")); - sb->s_root = d_alloc_root(root_i); + sb->s_root = d_make_root(root_i); if (!sb->s_root) - goto out_root_i; + goto out_root; sb->s_maxbytes = 0xFFFFFFFF; sb->s_blocksize = PAGE_CACHE_SIZE; @@ -573,8 +573,6 @@ int jffs2_do_fill_super(struct super_block *sb, void *data, int silent) jffs2_start_garbage_collect_thread(c); return 0; - out_root_i: - iput(root_i); out_root: jffs2_free_ino_caches(c); jffs2_free_raw_node_refs(c); diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c index 5f7c160ea64..07c91ca6017 100644 --- a/fs/jfs/namei.c +++ b/fs/jfs/namei.c @@ -220,12 +220,6 @@ static int jfs_mkdir(struct inode *dip, struct dentry *dentry, umode_t mode) dquot_initialize(dip); - /* link count overflow on parent directory ? */ - if (dip->i_nlink == JFS_LINK_MAX) { - rc = -EMLINK; - goto out1; - } - /* * search parent directory for entry/freespace * (dtSearch() returns parent directory page pinned) @@ -806,9 +800,6 @@ static int jfs_link(struct dentry *old_dentry, jfs_info("jfs_link: %s %s", old_dentry->d_name.name, dentry->d_name.name); - if (ip->i_nlink == JFS_LINK_MAX) - return -EMLINK; - dquot_initialize(dir); tid = txBegin(ip->i_sb, 0); @@ -1138,10 +1129,6 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, rc = -ENOTEMPTY; goto out3; } - } else if ((new_dir != old_dir) && - (new_dir->i_nlink == JFS_LINK_MAX)) { - rc = -EMLINK; - goto out3; } } else if (new_ip) { IWRITE_LOCK(new_ip, RDWRLOCK_NORMAL); diff --git a/fs/jfs/super.c b/fs/jfs/super.c index 682bca642f3..4a82950f412 100644 --- a/fs/jfs/super.c +++ b/fs/jfs/super.c @@ -441,6 +441,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent) return -ENOMEM; sb->s_fs_info = sbi; + sb->s_max_links = JFS_LINK_MAX; sbi->sb = sb; sbi->uid = sbi->gid = sbi->umask = -1; @@ -521,7 +522,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent) ret = PTR_ERR(inode); goto out_no_rw; } - sb->s_root = d_alloc_root(inode); + sb->s_root = d_make_root(inode); if (!sb->s_root) goto out_no_root; @@ -539,7 +540,6 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent) out_no_root: jfs_err("jfs_read_super: get root dentry failed"); - iput(inode); out_no_rw: rc = jfs_umount(sb); @@ -860,8 +860,14 @@ static int __init init_jfs_fs(void) jfs_proc_init(); #endif - return register_filesystem(&jfs_fs_type); + rc = register_filesystem(&jfs_fs_type); + if (!rc) + return 0; +#ifdef PROC_FS_JFS + jfs_proc_clean(); +#endif + kthread_stop(jfsSyncThread); kill_committask: for (i = 0; i < commit_threads; i++) kthread_stop(jfsCommitThread[i]); diff --git a/fs/libfs.c b/fs/libfs.c index 5b2dbb3ba4f..722e0d5ba18 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -491,11 +491,9 @@ int simple_fill_super(struct super_block *s, unsigned long magic, inode->i_op = &simple_dir_inode_operations; inode->i_fop = &simple_dir_operations; set_nlink(inode, 2); - root = d_alloc_root(inode); - if (!root) { - iput(inode); + root = d_make_root(inode); + if (!root) return -ENOMEM; - } for (i = 0; !files->name || files->name[0]; i++, files++) { if (!files->name) continue; @@ -536,7 +534,7 @@ int simple_pin_fs(struct file_system_type *type, struct vfsmount **mount, int *c spin_lock(&pin_fs_lock); if (unlikely(!*mount)) { spin_unlock(&pin_fs_lock); - mnt = vfs_kern_mount(type, 0, type->name, NULL); + mnt = vfs_kern_mount(type, MS_KERNMOUNT, type->name, NULL); if (IS_ERR(mnt)) return PTR_ERR(mnt); spin_lock(&pin_fs_lock); diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c index 1b6e21dda28..bea5d1b9954 100644 --- a/fs/logfs/dir.c +++ b/fs/logfs/dir.c @@ -558,9 +558,6 @@ static int logfs_link(struct dentry *old_dentry, struct inode *dir, { struct inode *inode = old_dentry->d_inode; - if (inode->i_nlink >= LOGFS_LINK_MAX) - return -EMLINK; - inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME; ihold(inode); inc_nlink(inode); diff --git a/fs/logfs/super.c b/fs/logfs/super.c index c9ee7f5d1ca..97bca623d89 100644 --- a/fs/logfs/super.c +++ b/fs/logfs/super.c @@ -315,11 +315,9 @@ static int logfs_get_sb_final(struct super_block *sb) if (IS_ERR(rootdir)) goto fail; - sb->s_root = d_alloc_root(rootdir); - if (!sb->s_root) { - iput(rootdir); + sb->s_root = d_make_root(rootdir); + if (!sb->s_root) goto fail; - } /* at that point we know that ->put_super() will be called */ super->s_erase_page = alloc_pages(GFP_KERNEL, 0); @@ -542,6 +540,7 @@ static struct dentry *logfs_get_sb_device(struct logfs_super *super, * the filesystem incompatible with 32bit systems. */ sb->s_maxbytes = (1ull << 43) - 1; + sb->s_max_links = LOGFS_LINK_MAX; sb->s_op = &logfs_super_operations; sb->s_flags = flags | MS_NOATIME; @@ -627,7 +626,10 @@ static int __init logfs_init(void) if (ret) goto out2; - return register_filesystem(&logfs_fs_type); + ret = register_filesystem(&logfs_fs_type); + if (!ret) + return 0; + logfs_destroy_inode_cache(); out2: logfs_compr_exit(); out1: diff --git a/fs/minix/inode.c b/fs/minix/inode.c index fa8b612b8ce..fcb05d2c6b5 100644 --- a/fs/minix/inode.c +++ b/fs/minix/inode.c @@ -190,24 +190,24 @@ static int minix_fill_super(struct super_block *s, void *data, int silent) sbi->s_version = MINIX_V1; sbi->s_dirsize = 16; sbi->s_namelen = 14; - sbi->s_link_max = MINIX_LINK_MAX; + s->s_max_links = MINIX_LINK_MAX; } else if (s->s_magic == MINIX_SUPER_MAGIC2) { sbi->s_version = MINIX_V1; sbi->s_dirsize = 32; sbi->s_namelen = 30; - sbi->s_link_max = MINIX_LINK_MAX; + s->s_max_links = MINIX_LINK_MAX; } else if (s->s_magic == MINIX2_SUPER_MAGIC) { sbi->s_version = MINIX_V2; sbi->s_nzones = ms->s_zones; sbi->s_dirsize = 16; sbi->s_namelen = 14; - sbi->s_link_max = MINIX2_LINK_MAX; + s->s_max_links = MINIX2_LINK_MAX; } else if (s->s_magic == MINIX2_SUPER_MAGIC2) { sbi->s_version = MINIX_V2; sbi->s_nzones = ms->s_zones; sbi->s_dirsize = 32; sbi->s_namelen = 30; - sbi->s_link_max = MINIX2_LINK_MAX; + s->s_max_links = MINIX2_LINK_MAX; } else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) { m3s = (struct minix3_super_block *) bh->b_data; s->s_magic = m3s->s_magic; @@ -221,9 +221,9 @@ static int minix_fill_super(struct super_block *s, void *data, int silent) sbi->s_dirsize = 64; sbi->s_namelen = 60; sbi->s_version = MINIX_V3; - sbi->s_link_max = MINIX2_LINK_MAX; sbi->s_mount_state = MINIX_VALID_FS; sb_set_blocksize(s, m3s->s_blocksize); + s->s_max_links = MINIX2_LINK_MAX; } else goto out_no_fs; @@ -254,14 +254,6 @@ static int minix_fill_super(struct super_block *s, void *data, int silent) minix_set_bit(0,sbi->s_imap[0]->b_data); minix_set_bit(0,sbi->s_zmap[0]->b_data); - /* set up enough so that it can read an inode */ - s->s_op = &minix_sops; - root_inode = minix_iget(s, MINIX_ROOT_INO); - if (IS_ERR(root_inode)) { - ret = PTR_ERR(root_inode); - goto out_no_root; - } - /* Apparently minix can create filesystems that allocate more blocks for * the bitmaps than needed. We simply ignore that, but verify it didn't * create one with not enough blocks and bail out if so. @@ -270,7 +262,7 @@ static int minix_fill_super(struct super_block *s, void *data, int silent) if (sbi->s_imap_blocks < block) { printk("MINIX-fs: file system does not have enough " "imap blocks allocated. Refusing to mount\n"); - goto out_iput; + goto out_no_bitmap; } block = minix_blocks_needed( @@ -279,13 +271,21 @@ static int minix_fill_super(struct super_block *s, void *data, int silent) if (sbi->s_zmap_blocks < block) { printk("MINIX-fs: file system does not have enough " "zmap blocks allocated. Refusing to mount.\n"); - goto out_iput; + goto out_no_bitmap; + } + + /* set up enough so that it can read an inode */ + s->s_op = &minix_sops; + root_inode = minix_iget(s, MINIX_ROOT_INO); + if (IS_ERR(root_inode)) { + ret = PTR_ERR(root_inode); + goto out_no_root; } ret = -ENOMEM; - s->s_root = d_alloc_root(root_inode); + s->s_root = d_make_root(root_inode); if (!s->s_root) - goto out_iput; + goto out_no_root; if (!(s->s_flags & MS_RDONLY)) { if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ @@ -301,10 +301,6 @@ static int minix_fill_super(struct super_block *s, void *data, int silent) return 0; -out_iput: - iput(root_inode); - goto out_freemap; - out_no_root: if (!silent) printk("MINIX-fs: get root inode failed\n"); diff --git a/fs/minix/minix.h b/fs/minix/minix.h index c889ef0aa57..1ebd1185462 100644 --- a/fs/minix/minix.h +++ b/fs/minix/minix.h @@ -34,7 +34,6 @@ struct minix_sb_info { unsigned long s_max_size; int s_dirsize; int s_namelen; - int s_link_max; struct buffer_head ** s_imap; struct buffer_head ** s_zmap; struct buffer_head * s_sbh; diff --git a/fs/minix/namei.c b/fs/minix/namei.c index 2f76e38c206..2d0ee178630 100644 --- a/fs/minix/namei.c +++ b/fs/minix/namei.c @@ -94,9 +94,6 @@ static int minix_link(struct dentry * old_dentry, struct inode * dir, { struct inode *inode = old_dentry->d_inode; - if (inode->i_nlink >= minix_sb(inode->i_sb)->s_link_max) - return -EMLINK; - inode->i_ctime = CURRENT_TIME_SEC; inode_inc_link_count(inode); ihold(inode); @@ -106,10 +103,7 @@ static int minix_link(struct dentry * old_dentry, struct inode * dir, static int minix_mkdir(struct inode * dir, struct dentry *dentry, umode_t mode) { struct inode * inode; - int err = -EMLINK; - - if (dir->i_nlink >= minix_sb(dir->i_sb)->s_link_max) - goto out; + int err; inode_inc_link_count(dir); @@ -181,7 +175,6 @@ static int minix_rmdir(struct inode * dir, struct dentry *dentry) static int minix_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir, struct dentry *new_dentry) { - struct minix_sb_info * info = minix_sb(old_dir->i_sb); struct inode * old_inode = old_dentry->d_inode; struct inode * new_inode = new_dentry->d_inode; struct page * dir_page = NULL; @@ -219,11 +212,6 @@ static int minix_rename(struct inode * old_dir, struct dentry *old_dentry, drop_nlink(new_inode); inode_dec_link_count(new_inode); } else { - if (dir_de) { - err = -EMLINK; - if (new_dir->i_nlink >= info->s_link_max) - goto out_dir; - } err = minix_add_link(new_dentry, old_inode); if (err) goto out_dir; diff --git a/fs/namei.c b/fs/namei.c index 20a4fcf001e..13e6a1f191a 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -642,7 +642,7 @@ follow_link(struct path *link, struct nameidata *nd, void **p) cond_resched(); current->total_link_count++; - touch_atime(link->mnt, dentry); + touch_atime(link); nd_set_link(nd, NULL); error = security_inode_follow_link(link->dentry, nd); @@ -2691,6 +2691,7 @@ SYSCALL_DEFINE3(mknod, const char __user *, filename, umode_t, mode, unsigned, d int vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) { int error = may_create(dir, dentry); + unsigned max_links = dir->i_sb->s_max_links; if (error) return error; @@ -2703,6 +2704,9 @@ int vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) if (error) return error; + if (max_links && dir->i_nlink >= max_links) + return -EMLINK; + error = dir->i_op->mkdir(dir, dentry, mode); if (!error) fsnotify_mkdir(dir, dentry); @@ -3033,6 +3037,7 @@ SYSCALL_DEFINE2(symlink, const char __user *, oldname, const char __user *, newn int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry) { struct inode *inode = old_dentry->d_inode; + unsigned max_links = dir->i_sb->s_max_links; int error; if (!inode) @@ -3063,6 +3068,8 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de /* Make sure we don't allow creating hardlink to an unlinked file */ if (inode->i_nlink == 0) error = -ENOENT; + else if (max_links && inode->i_nlink >= max_links) + error = -EMLINK; else error = dir->i_op->link(old_dentry, dir, new_dentry); mutex_unlock(&inode->i_mutex); @@ -3172,6 +3179,7 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry, { int error = 0; struct inode *target = new_dentry->d_inode; + unsigned max_links = new_dir->i_sb->s_max_links; /* * If we are going to change the parent - check write permissions, @@ -3195,6 +3203,11 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry, if (d_mountpoint(old_dentry) || d_mountpoint(new_dentry)) goto out; + error = -EMLINK; + if (max_links && !target && new_dir != old_dir && + new_dir->i_nlink >= max_links) + goto out; + if (target) shrink_dcache_parent(new_dentry); error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry); diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c index 3d1e34f8a68..49df0e7f837 100644 --- a/fs/ncpfs/inode.c +++ b/fs/ncpfs/inode.c @@ -716,13 +716,11 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent) if (!root_inode) goto out_disconnect; DPRINTK("ncp_fill_super: root vol=%d\n", NCP_FINFO(root_inode)->volNumber); - sb->s_root = d_alloc_root(root_inode); + sb->s_root = d_make_root(root_inode); if (!sb->s_root) - goto out_no_root; + goto out_disconnect; return 0; -out_no_root: - iput(root_inode); out_disconnect: ncp_lock_server(server); ncp_disconnect(server); diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c index dcb61548887..801d6d83078 100644 --- a/fs/nfs/getroot.c +++ b/fs/nfs/getroot.c @@ -49,11 +49,9 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i { /* The mntroot acts as the dummy root dentry for this superblock */ if (sb->s_root == NULL) { - sb->s_root = d_alloc_root(inode); - if (sb->s_root == NULL) { - iput(inode); + sb->s_root = d_make_root(inode); + if (sb->s_root == NULL) return -ENOMEM; - } ihold(inode); /* * Ensure that this dentry is invisible to d_find_alias(). diff --git a/fs/nfsd/fault_inject.c b/fs/nfsd/fault_inject.c index ce7f0758d84..9559ce46873 100644 --- a/fs/nfsd/fault_inject.c +++ b/fs/nfsd/fault_inject.c @@ -72,7 +72,7 @@ int nfsd_fault_inject_init(void) { unsigned int i; struct nfsd_fault_inject_op *op; - mode_t mode = S_IFREG | S_IRUSR | S_IWUSR; + umode_t mode = S_IFREG | S_IRUSR | S_IWUSR; debug_dir = debugfs_create_dir("nfsd", NULL); if (!debug_dir) diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index edf6d3ed877..e59f71d0cf7 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1541,30 +1541,31 @@ do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, __be32 nfsd_readlink(struct svc_rqst *rqstp, struct svc_fh *fhp, char *buf, int *lenp) { - struct dentry *dentry; struct inode *inode; mm_segment_t oldfs; __be32 err; int host_err; + struct path path; err = fh_verify(rqstp, fhp, S_IFLNK, NFSD_MAY_NOP); if (err) goto out; - dentry = fhp->fh_dentry; - inode = dentry->d_inode; + path.mnt = fhp->fh_export->ex_path.mnt; + path.dentry = fhp->fh_dentry; + inode = path.dentry->d_inode; err = nfserr_inval; if (!inode->i_op->readlink) goto out; - touch_atime(fhp->fh_export->ex_path.mnt, dentry); + touch_atime(&path); /* N.B. Why does this call need a get_fs()?? * Remove the set_fs and watch the fireworks:-) --okir */ oldfs = get_fs(); set_fs(KERNEL_DS); - host_err = inode->i_op->readlink(dentry, buf, *lenp); + host_err = inode->i_op->readlink(path.dentry, buf, *lenp); set_fs(oldfs); if (host_err < 0) diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c index 1cd3f624dff..fce2bbee66d 100644 --- a/fs/nilfs2/namei.c +++ b/fs/nilfs2/namei.c @@ -193,9 +193,6 @@ static int nilfs_link(struct dentry *old_dentry, struct inode *dir, struct nilfs_transaction_info ti; int err; - if (inode->i_nlink >= NILFS_LINK_MAX) - return -EMLINK; - err = nilfs_transaction_begin(dir->i_sb, &ti, 1); if (err) return err; @@ -219,9 +216,6 @@ static int nilfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) struct nilfs_transaction_info ti; int err; - if (dir->i_nlink >= NILFS_LINK_MAX) - return -EMLINK; - err = nilfs_transaction_begin(dir->i_sb, &ti, 1); if (err) return err; @@ -400,11 +394,6 @@ static int nilfs_rename(struct inode *old_dir, struct dentry *old_dentry, drop_nlink(new_inode); nilfs_mark_inode_dirty(new_inode); } else { - if (dir_de) { - err = -EMLINK; - if (new_dir->i_nlink >= NILFS_LINK_MAX) - goto out_dir; - } err = nilfs_add_link(new_dentry, old_inode); if (err) goto out_dir; diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 08e3d4f9df1..1099a76cee5 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -917,9 +917,8 @@ static int nilfs_get_root_dentry(struct super_block *sb, if (root->cno == NILFS_CPTREE_CURRENT_CNO) { dentry = d_find_alias(inode); if (!dentry) { - dentry = d_alloc_root(inode); + dentry = d_make_root(inode); if (!dentry) { - iput(inode); ret = -ENOMEM; goto failed_dentry; } @@ -1059,6 +1058,7 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_export_op = &nilfs_export_ops; sb->s_root = NULL; sb->s_time_gran = 1; + sb->s_max_links = NILFS_LINK_MAX; bdi = sb->s_bdev->bd_inode->i_mapping->backing_dev_info; sb->s_bdi = bdi ? : &default_backing_dev_info; diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c index 28d4e6ab663..b341492542c 100644 --- a/fs/ntfs/super.c +++ b/fs/ntfs/super.c @@ -2908,9 +2908,10 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent) ntfs_error(sb, "Failed to load system files."); goto unl_upcase_iput_tmp_ino_err_out_now; } - if ((sb->s_root = d_alloc_root(vol->root_ino))) { - /* We grab a reference, simulating an ntfs_iget(). */ - ihold(vol->root_ino); + + /* We grab a reference, simulating an ntfs_iget(). */ + ihold(vol->root_ino); + if ((sb->s_root = d_make_root(vol->root_ino))) { ntfs_debug("Exiting, status successful."); /* Release the default upcase if it has no users. */ mutex_lock(&ntfs_lock); @@ -3158,6 +3159,8 @@ static int __init init_ntfs_fs(void) } printk(KERN_CRIT "NTFS: Failed to register NTFS filesystem driver!\n"); + /* Unregister the ntfs sysctls. */ + ntfs_sysctl(0); sysctl_err_out: kmem_cache_destroy(ntfs_big_inode_cache); big_inode_err_out: diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c index abfac0d7ae9..3b5825ef319 100644 --- a/fs/ocfs2/dlmfs/dlmfs.c +++ b/fs/ocfs2/dlmfs/dlmfs.c @@ -582,24 +582,14 @@ static int dlmfs_fill_super(struct super_block * sb, void * data, int silent) { - struct inode * inode; - struct dentry * root; - sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize_bits = PAGE_CACHE_SHIFT; sb->s_magic = DLMFS_MAGIC; sb->s_op = &dlmfs_ops; - inode = dlmfs_get_root_inode(sb); - if (!inode) - return -ENOMEM; - - root = d_alloc_root(inode); - if (!root) { - iput(inode); + sb->s_root = d_make_root(dlmfs_get_root_inode(sb)); + if (!sb->s_root) return -ENOMEM; - } - sb->s_root = root; return 0; } diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 604e12c4e97..68f4541c2db 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -1154,19 +1154,19 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) } status = ocfs2_mount_volume(sb); - if (osb->root_inode) - inode = igrab(osb->root_inode); - if (status < 0) goto read_super_error; + if (osb->root_inode) + inode = igrab(osb->root_inode); + if (!inode) { status = -EIO; mlog_errno(status); goto read_super_error; } - root = d_alloc_root(inode); + root = d_make_root(inode); if (!root) { status = -ENOMEM; mlog_errno(status); @@ -1220,9 +1220,6 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) read_super_error: brelse(bh); - if (inode) - iput(inode); - if (osb) { atomic_set(&osb->vol_state, VOLUME_DISABLED); wake_up(&osb->osb_mount_event); @@ -1627,21 +1624,17 @@ static int __init ocfs2_init(void) init_waitqueue_head(&ocfs2__ioend_wq[i]); status = init_ocfs2_uptodate_cache(); - if (status < 0) { - mlog_errno(status); - goto leave; - } + if (status < 0) + goto out1; status = ocfs2_initialize_mem_caches(); - if (status < 0) { - mlog_errno(status); - goto leave; - } + if (status < 0) + goto out2; ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); if (!ocfs2_wq) { status = -ENOMEM; - goto leave; + goto out3; } ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); @@ -1653,17 +1646,23 @@ static int __init ocfs2_init(void) ocfs2_set_locking_protocol(); status = register_quota_format(&ocfs2_quota_format); -leave: - if (status < 0) { - ocfs2_free_mem_caches(); - exit_ocfs2_uptodate_cache(); - mlog_errno(status); - } + if (status < 0) + goto out4; + status = register_filesystem(&ocfs2_fs_type); + if (!status) + return 0; - if (status >= 0) { - return register_filesystem(&ocfs2_fs_type); - } else - return -1; + unregister_quota_format(&ocfs2_quota_format); +out4: + destroy_workqueue(ocfs2_wq); + debugfs_remove(ocfs2_debugfs_root); +out3: + ocfs2_free_mem_caches(); +out2: + exit_ocfs2_uptodate_cache(); +out1: + mlog_errno(status); + return status; } static void __exit ocfs2_exit(void) diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c index 6065bb0ba20..dbc84222258 100644 --- a/fs/omfs/inode.c +++ b/fs/omfs/inode.c @@ -539,11 +539,9 @@ static int omfs_fill_super(struct super_block *sb, void *data, int silent) goto out_brelse_bh2; } - sb->s_root = d_alloc_root(root); - if (!sb->s_root) { - iput(root); + sb->s_root = d_make_root(root); + if (!sb->s_root) goto out_brelse_bh2; - } printk(KERN_DEBUG "omfs: Mounted volume %s\n", omfs_rb->r_name); ret = 0; diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c index a88c03bc749..bc49c975d50 100644 --- a/fs/openpromfs/inode.c +++ b/fs/openpromfs/inode.c @@ -408,13 +408,12 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent) oi->type = op_inode_node; oi->u.node = of_find_node_by_path("/"); - s->s_root = d_alloc_root(root_inode); + s->s_root = d_make_root(root_inode); if (!s->s_root) goto out_no_root_dentry; return 0; out_no_root_dentry: - iput(root_inode); ret = -ENOMEM; out_no_root: printk("openprom_fill_super: get root inode failed\n"); diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 84fd3235a59..8461a7b82fd 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -486,8 +486,6 @@ struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de) int proc_fill_super(struct super_block *s) { - struct inode * root_inode; - s->s_flags |= MS_NODIRATIME | MS_NOSUID | MS_NOEXEC; s->s_blocksize = 1024; s->s_blocksize_bits = 10; @@ -496,19 +494,11 @@ int proc_fill_super(struct super_block *s) s->s_time_gran = 1; pde_get(&proc_root); - root_inode = proc_get_inode(s, &proc_root); - if (!root_inode) - goto out_no_root; - root_inode->i_uid = 0; - root_inode->i_gid = 0; - s->s_root = d_alloc_root(root_inode); - if (!s->s_root) - goto out_no_root; - return 0; + s->s_root = d_make_root(proc_get_inode(s, &proc_root)); + if (s->s_root) + return 0; -out_no_root: printk("proc_read_super: get root inode failed\n"); - iput(root_inode); pde_put(&proc_root); return -ENOMEM; } diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c index b3b426edb2f..f37c32b9452 100644 --- a/fs/pstore/inode.c +++ b/fs/pstore/inode.c @@ -278,9 +278,7 @@ fail: int pstore_fill_super(struct super_block *sb, void *data, int silent) { - struct inode *inode = NULL; - struct dentry *root; - int err; + struct inode *inode; save_mount_options(sb, data); @@ -296,26 +294,17 @@ int pstore_fill_super(struct super_block *sb, void *data, int silent) parse_options(data); inode = pstore_get_inode(sb, NULL, S_IFDIR | 0755, 0); - if (!inode) { - err = -ENOMEM; - goto fail; - } - /* override ramfs "dir" options so we catch unlink(2) */ - inode->i_op = &pstore_dir_inode_operations; - - root = d_alloc_root(inode); - sb->s_root = root; - if (!root) { - err = -ENOMEM; - goto fail; + if (inode) { + /* override ramfs "dir" options so we catch unlink(2) */ + inode->i_op = &pstore_dir_inode_operations; } + sb->s_root = d_make_root(inode); + if (!sb->s_root) + return -ENOMEM; pstore_get_records(0); return 0; -fail: - iput(inode); - return err; } static struct dentry *pstore_mount(struct file_system_type *fs_type, diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c index 6b009548d2e..552e994e3aa 100644 --- a/fs/qnx4/inode.c +++ b/fs/qnx4/inode.c @@ -52,38 +52,6 @@ static int qnx4_remount(struct super_block *sb, int *flags, char *data) return 0; } -static struct buffer_head *qnx4_getblk(struct inode *inode, int nr, - int create) -{ - struct buffer_head *result = NULL; - - if ( nr >= 0 ) - nr = qnx4_block_map( inode, nr ); - if (nr) { - result = sb_getblk(inode->i_sb, nr); - return result; - } - return NULL; -} - -struct buffer_head *qnx4_bread(struct inode *inode, int block, int create) -{ - struct buffer_head *bh; - - bh = qnx4_getblk(inode, block, create); - if (!bh || buffer_uptodate(bh)) { - return bh; - } - ll_rw_block(READ, 1, &bh); - wait_on_buffer(bh); - if (buffer_uptodate(bh)) { - return bh; - } - brelse(bh); - - return NULL; -} - static int qnx4_get_block( struct inode *inode, sector_t iblock, struct buffer_head *bh, int create ) { unsigned long phys; @@ -98,23 +66,31 @@ static int qnx4_get_block( struct inode *inode, sector_t iblock, struct buffer_h return 0; } +static inline u32 try_extent(qnx4_xtnt_t *extent, u32 *offset) +{ + u32 size = le32_to_cpu(extent->xtnt_size); + if (*offset < size) + return le32_to_cpu(extent->xtnt_blk) + *offset - 1; + *offset -= size; + return 0; +} + unsigned long qnx4_block_map( struct inode *inode, long iblock ) { int ix; - long offset, i_xblk; - unsigned long block = 0; + long i_xblk; struct buffer_head *bh = NULL; struct qnx4_xblk *xblk = NULL; struct qnx4_inode_entry *qnx4_inode = qnx4_raw_inode(inode); u16 nxtnt = le16_to_cpu(qnx4_inode->di_num_xtnts); + u32 offset = iblock; + u32 block = try_extent(&qnx4_inode->di_first_xtnt, &offset); - if ( iblock < le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size) ) { + if (block) { // iblock is in the first extent. This is easy. - block = le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_blk) + iblock - 1; } else { // iblock is beyond first extent. We have to follow the extent chain. i_xblk = le32_to_cpu(qnx4_inode->di_xblk); - offset = iblock - le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size); ix = 0; while ( --nxtnt > 0 ) { if ( ix == 0 ) { @@ -130,12 +106,11 @@ unsigned long qnx4_block_map( struct inode *inode, long iblock ) return -EIO; } } - if ( offset < le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size) ) { + block = try_extent(&xblk->xblk_xtnts[ix], &offset); + if (block) { // got it! - block = le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_blk) + offset - 1; break; } - offset -= le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size); if ( ++ix >= xblk->xblk_num_xtnts ) { i_xblk = le32_to_cpu(xblk->xblk_next_xblk); ix = 0; @@ -260,15 +235,13 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent) } ret = -ENOMEM; - s->s_root = d_alloc_root(root); + s->s_root = d_make_root(root); if (s->s_root == NULL) - goto outi; + goto outb; brelse(bh); return 0; - outi: - iput(root); outb: kfree(qs->BitMap); out: @@ -288,44 +261,17 @@ static void qnx4_put_super(struct super_block *sb) return; } -static int qnx4_writepage(struct page *page, struct writeback_control *wbc) -{ - return block_write_full_page(page,qnx4_get_block, wbc); -} - static int qnx4_readpage(struct file *file, struct page *page) { return block_read_full_page(page,qnx4_get_block); } -static int qnx4_write_begin(struct file *file, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata) -{ - struct qnx4_inode_info *qnx4_inode = qnx4_i(mapping->host); - int ret; - - *pagep = NULL; - ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, - qnx4_get_block, - &qnx4_inode->mmu_private); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } - - return ret; -} static sector_t qnx4_bmap(struct address_space *mapping, sector_t block) { return generic_block_bmap(mapping,block,qnx4_get_block); } static const struct address_space_operations qnx4_aops = { .readpage = qnx4_readpage, - .writepage = qnx4_writepage, - .write_begin = qnx4_write_begin, - .write_end = generic_write_end, .bmap = qnx4_bmap }; diff --git a/fs/qnx4/namei.c b/fs/qnx4/namei.c index 275327b5615..a512c0b30e8 100644 --- a/fs/qnx4/namei.c +++ b/fs/qnx4/namei.c @@ -39,10 +39,6 @@ static int qnx4_match(int len, const char *name, } else { namelen = QNX4_SHORT_NAME_MAX; } - /* "" means "." ---> so paths like "/usr/lib//libc.a" work */ - if (!len && (de->di_fname[0] == '.') && (de->di_fname[1] == '\0')) { - return 1; - } thislen = strlen( de->di_fname ); if ( thislen > namelen ) thislen = namelen; @@ -72,7 +68,9 @@ static struct buffer_head *qnx4_find_entry(int len, struct inode *dir, block = offset = blkofs = 0; while (blkofs * QNX4_BLOCK_SIZE + offset < dir->i_size) { if (!bh) { - bh = qnx4_bread(dir, blkofs, 0); + block = qnx4_block_map(dir, blkofs); + if (block) + bh = sb_bread(dir->i_sb, block); if (!bh) { blkofs++; continue; @@ -80,7 +78,6 @@ static struct buffer_head *qnx4_find_entry(int len, struct inode *dir, } *res_dir = (struct qnx4_inode_entry *) (bh->b_data + offset); if (qnx4_match(len, name, bh, &offset)) { - block = qnx4_block_map( dir, blkofs ); *ino = block * QNX4_INODES_PER_BLOCK + (offset / QNX4_DIR_ENTRY_SIZE) - 1; return bh; diff --git a/fs/qnx4/qnx4.h b/fs/qnx4/qnx4.h index 33a60858203..244d4620189 100644 --- a/fs/qnx4/qnx4.h +++ b/fs/qnx4/qnx4.h @@ -27,8 +27,6 @@ extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, stru extern unsigned long qnx4_count_free_blocks(struct super_block *sb); extern unsigned long qnx4_block_map(struct inode *inode, long iblock); -extern struct buffer_head *qnx4_bread(struct inode *, int, int); - extern const struct inode_operations qnx4_dir_inode_operations; extern const struct file_operations qnx4_dir_operations; extern int qnx4_is_free(struct super_block *sb, long block); diff --git a/fs/qnx6/Kconfig b/fs/qnx6/Kconfig new file mode 100644 index 00000000000..edbba5c17cc --- /dev/null +++ b/fs/qnx6/Kconfig @@ -0,0 +1,26 @@ +config QNX6FS_FS + tristate "QNX6 file system support (read only)" + depends on BLOCK && CRC32 + help + This is the file system used by the real-time operating systems + QNX 6 (also called QNX RTP). + Further information is available at <http://www.qnx.com/>. + Say Y if you intend to mount QNX hard disks or floppies formatted + with a mkqnx6fs. + However, keep in mind that this currently is a readonly driver! + + To compile this file system support as a module, choose M here: the + module will be called qnx6. + + If you don't know whether you need it, then you don't need it: + answer N. + +config QNX6FS_DEBUG + bool "QNX6 debugging information" + depends on QNX6FS_FS + help + Turns on extended debugging output. + + If you are not a developer working on the QNX6FS, you probably don't + want this: + answer N. diff --git a/fs/qnx6/Makefile b/fs/qnx6/Makefile new file mode 100644 index 00000000000..9dd06199afc --- /dev/null +++ b/fs/qnx6/Makefile @@ -0,0 +1,7 @@ +# +# Makefile for the linux qnx4-filesystem routines. +# + +obj-$(CONFIG_QNX6FS_FS) += qnx6.o + +qnx6-objs := inode.o dir.o namei.o super_mmi.o diff --git a/fs/qnx6/README b/fs/qnx6/README new file mode 100644 index 00000000000..116d622026c --- /dev/null +++ b/fs/qnx6/README @@ -0,0 +1,8 @@ + + This is a snapshot of the QNX6 filesystem for Linux. + Please send diffs and remarks to <chaosman@ontika.net> . + +Credits : + +Al Viro <viro@ZenIV.linux.org.uk> (endless patience with me & support ;)) +Kai Bankett <chaosman@ontika.net> (Maintainer) diff --git a/fs/qnx6/dir.c b/fs/qnx6/dir.c new file mode 100644 index 00000000000..dc597353db3 --- /dev/null +++ b/fs/qnx6/dir.c @@ -0,0 +1,291 @@ +/* + * QNX6 file system, Linux implementation. + * + * Version : 1.0.0 + * + * History : + * + * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release. + * 16-02-2012 pagemap extension by Al Viro + * + */ + +#include "qnx6.h" + +static unsigned qnx6_lfile_checksum(char *name, unsigned size) +{ + unsigned crc = 0; + char *end = name + size; + while (name < end) { + crc = ((crc >> 1) + *(name++)) ^ + ((crc & 0x00000001) ? 0x80000000 : 0); + } + return crc; +} + +static struct page *qnx6_get_page(struct inode *dir, unsigned long n) +{ + struct address_space *mapping = dir->i_mapping; + struct page *page = read_mapping_page(mapping, n, NULL); + if (!IS_ERR(page)) + kmap(page); + return page; +} + +static inline unsigned long dir_pages(struct inode *inode) +{ + return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT; +} + +static unsigned last_entry(struct inode *inode, unsigned long page_nr) +{ + unsigned long last_byte = inode->i_size; + last_byte -= page_nr << PAGE_CACHE_SHIFT; + if (last_byte > PAGE_CACHE_SIZE) + last_byte = PAGE_CACHE_SIZE; + return last_byte / QNX6_DIR_ENTRY_SIZE; +} + +static struct qnx6_long_filename *qnx6_longname(struct super_block *sb, + struct qnx6_long_dir_entry *de, + struct page **p) +{ + struct qnx6_sb_info *sbi = QNX6_SB(sb); + u32 s = fs32_to_cpu(sbi, de->de_long_inode); /* in block units */ + u32 n = s >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits); /* in pages */ + /* within page */ + u32 offs = (s << sb->s_blocksize_bits) & ~PAGE_CACHE_MASK; + struct address_space *mapping = sbi->longfile->i_mapping; + struct page *page = read_mapping_page(mapping, n, NULL); + if (IS_ERR(page)) + return ERR_CAST(page); + kmap(*p = page); + return (struct qnx6_long_filename *)(page_address(page) + offs); +} + +static int qnx6_dir_longfilename(struct inode *inode, + struct qnx6_long_dir_entry *de, + void *dirent, loff_t pos, + unsigned de_inode, filldir_t filldir) +{ + struct qnx6_long_filename *lf; + struct super_block *s = inode->i_sb; + struct qnx6_sb_info *sbi = QNX6_SB(s); + struct page *page; + int lf_size; + + if (de->de_size != 0xff) { + /* error - long filename entries always have size 0xff + in direntry */ + printk(KERN_ERR "qnx6: invalid direntry size (%i).\n", + de->de_size); + return 0; + } + lf = qnx6_longname(s, de, &page); + if (IS_ERR(lf)) { + printk(KERN_ERR "qnx6:Error reading longname\n"); + return 0; + } + + lf_size = fs16_to_cpu(sbi, lf->lf_size); + + if (lf_size > QNX6_LONG_NAME_MAX) { + QNX6DEBUG((KERN_INFO "file %s\n", lf->lf_fname)); + printk(KERN_ERR "qnx6:Filename too long (%i)\n", lf_size); + qnx6_put_page(page); + return 0; + } + + /* calc & validate longfilename checksum + mmi 3g filesystem does not have that checksum */ + if (!test_opt(s, MMI_FS) && fs32_to_cpu(sbi, de->de_checksum) != + qnx6_lfile_checksum(lf->lf_fname, lf_size)) + printk(KERN_INFO "qnx6: long filename checksum error.\n"); + + QNX6DEBUG((KERN_INFO "qnx6_readdir:%.*s inode:%u\n", + lf_size, lf->lf_fname, de_inode)); + if (filldir(dirent, lf->lf_fname, lf_size, pos, de_inode, + DT_UNKNOWN) < 0) { + qnx6_put_page(page); + return 0; + } + + qnx6_put_page(page); + /* success */ + return 1; +} + +static int qnx6_readdir(struct file *filp, void *dirent, filldir_t filldir) +{ + struct inode *inode = filp->f_path.dentry->d_inode; + struct super_block *s = inode->i_sb; + struct qnx6_sb_info *sbi = QNX6_SB(s); + loff_t pos = filp->f_pos & (QNX6_DIR_ENTRY_SIZE - 1); + unsigned long npages = dir_pages(inode); + unsigned long n = pos >> PAGE_CACHE_SHIFT; + unsigned start = (pos & ~PAGE_CACHE_MASK) / QNX6_DIR_ENTRY_SIZE; + bool done = false; + + if (filp->f_pos >= inode->i_size) + return 0; + + for ( ; !done && n < npages; n++, start = 0) { + struct page *page = qnx6_get_page(inode, n); + int limit = last_entry(inode, n); + struct qnx6_dir_entry *de; + int i = start; + + if (IS_ERR(page)) { + printk(KERN_ERR "qnx6_readdir: read failed\n"); + filp->f_pos = (n + 1) << PAGE_CACHE_SHIFT; + return PTR_ERR(page); + } + de = ((struct qnx6_dir_entry *)page_address(page)) + start; + for (; i < limit; i++, de++, pos += QNX6_DIR_ENTRY_SIZE) { + int size = de->de_size; + u32 no_inode = fs32_to_cpu(sbi, de->de_inode); + + if (!no_inode || !size) + continue; + + if (size > QNX6_SHORT_NAME_MAX) { + /* long filename detected + get the filename from long filename + structure / block */ + if (!qnx6_dir_longfilename(inode, + (struct qnx6_long_dir_entry *)de, + dirent, pos, no_inode, + filldir)) { + done = true; + break; + } + } else { + QNX6DEBUG((KERN_INFO "qnx6_readdir:%.*s" + " inode:%u\n", size, de->de_fname, + no_inode)); + if (filldir(dirent, de->de_fname, size, + pos, no_inode, DT_UNKNOWN) + < 0) { + done = true; + break; + } + } + } + qnx6_put_page(page); + } + filp->f_pos = pos; + return 0; +} + +/* + * check if the long filename is correct. + */ +static unsigned qnx6_long_match(int len, const char *name, + struct qnx6_long_dir_entry *de, struct inode *dir) +{ + struct super_block *s = dir->i_sb; + struct qnx6_sb_info *sbi = QNX6_SB(s); + struct page *page; + int thislen; + struct qnx6_long_filename *lf = qnx6_longname(s, de, &page); + + if (IS_ERR(lf)) + return 0; + + thislen = fs16_to_cpu(sbi, lf->lf_size); + if (len != thislen) { + qnx6_put_page(page); + return 0; + } + if (memcmp(name, lf->lf_fname, len) == 0) { + qnx6_put_page(page); + return fs32_to_cpu(sbi, de->de_inode); + } + qnx6_put_page(page); + return 0; +} + +/* + * check if the filename is correct. + */ +static unsigned qnx6_match(struct super_block *s, int len, const char *name, + struct qnx6_dir_entry *de) +{ + struct qnx6_sb_info *sbi = QNX6_SB(s); + if (memcmp(name, de->de_fname, len) == 0) + return fs32_to_cpu(sbi, de->de_inode); + return 0; +} + + +unsigned qnx6_find_entry(int len, struct inode *dir, const char *name, + struct page **res_page) +{ + struct super_block *s = dir->i_sb; + struct qnx6_inode_info *ei = QNX6_I(dir); + struct page *page = NULL; + unsigned long start, n; + unsigned long npages = dir_pages(dir); + unsigned ino; + struct qnx6_dir_entry *de; + struct qnx6_long_dir_entry *lde; + + *res_page = NULL; + + if (npages == 0) + return 0; + start = ei->i_dir_start_lookup; + if (start >= npages) + start = 0; + n = start; + + do { + page = qnx6_get_page(dir, n); + if (!IS_ERR(page)) { + int limit = last_entry(dir, n); + int i; + + de = (struct qnx6_dir_entry *)page_address(page); + for (i = 0; i < limit; i++, de++) { + if (len <= QNX6_SHORT_NAME_MAX) { + /* short filename */ + if (len != de->de_size) + continue; + ino = qnx6_match(s, len, name, de); + if (ino) + goto found; + } else if (de->de_size == 0xff) { + /* deal with long filename */ + lde = (struct qnx6_long_dir_entry *)de; + ino = qnx6_long_match(len, + name, lde, dir); + if (ino) + goto found; + } else + printk(KERN_ERR "qnx6: undefined " + "filename size in inode.\n"); + } + qnx6_put_page(page); + } + + if (++n >= npages) + n = 0; + } while (n != start); + return 0; + +found: + *res_page = page; + ei->i_dir_start_lookup = n; + return ino; +} + +const struct file_operations qnx6_dir_operations = { + .llseek = generic_file_llseek, + .read = generic_read_dir, + .readdir = qnx6_readdir, + .fsync = generic_file_fsync, +}; + +const struct inode_operations qnx6_dir_inode_operations = { + .lookup = qnx6_lookup, +}; diff --git a/fs/qnx6/inode.c b/fs/qnx6/inode.c new file mode 100644 index 00000000000..e44012dc564 --- /dev/null +++ b/fs/qnx6/inode.c @@ -0,0 +1,698 @@ +/* + * QNX6 file system, Linux implementation. + * + * Version : 1.0.0 + * + * History : + * + * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release. + * 16-02-2012 pagemap extension by Al Viro + * + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/highuid.h> +#include <linux/pagemap.h> +#include <linux/buffer_head.h> +#include <linux/writeback.h> +#include <linux/statfs.h> +#include <linux/parser.h> +#include <linux/seq_file.h> +#include <linux/mount.h> +#include <linux/crc32.h> +#include <linux/mpage.h> +#include "qnx6.h" + +static const struct super_operations qnx6_sops; + +static void qnx6_put_super(struct super_block *sb); +static struct inode *qnx6_alloc_inode(struct super_block *sb); +static void qnx6_destroy_inode(struct inode *inode); +static int qnx6_remount(struct super_block *sb, int *flags, char *data); +static int qnx6_statfs(struct dentry *dentry, struct kstatfs *buf); +static int qnx6_show_options(struct seq_file *seq, struct dentry *root); + +static const struct super_operations qnx6_sops = { + .alloc_inode = qnx6_alloc_inode, + .destroy_inode = qnx6_destroy_inode, + .put_super = qnx6_put_super, + .statfs = qnx6_statfs, + .remount_fs = qnx6_remount, + .show_options = qnx6_show_options, +}; + +static int qnx6_show_options(struct seq_file *seq, struct dentry *root) +{ + struct super_block *sb = root->d_sb; + struct qnx6_sb_info *sbi = QNX6_SB(sb); + + if (sbi->s_mount_opt & QNX6_MOUNT_MMI_FS) + seq_puts(seq, ",mmi_fs"); + return 0; +} + +static int qnx6_remount(struct super_block *sb, int *flags, char *data) +{ + *flags |= MS_RDONLY; + return 0; +} + +static unsigned qnx6_get_devblock(struct super_block *sb, __fs32 block) +{ + struct qnx6_sb_info *sbi = QNX6_SB(sb); + return fs32_to_cpu(sbi, block) + sbi->s_blks_off; +} + +static unsigned qnx6_block_map(struct inode *inode, unsigned iblock); + +static int qnx6_get_block(struct inode *inode, sector_t iblock, + struct buffer_head *bh, int create) +{ + unsigned phys; + + QNX6DEBUG((KERN_INFO "qnx6: qnx6_get_block inode=[%ld] iblock=[%ld]\n", + inode->i_ino, (unsigned long)iblock)); + + phys = qnx6_block_map(inode, iblock); + if (phys) { + /* logical block is before EOF */ + map_bh(bh, inode->i_sb, phys); + } + return 0; +} + +static int qnx6_check_blockptr(__fs32 ptr) +{ + if (ptr == ~(__fs32)0) { + printk(KERN_ERR "qnx6: hit unused blockpointer.\n"); + return 0; + } + return 1; +} + +static int qnx6_readpage(struct file *file, struct page *page) +{ + return mpage_readpage(page, qnx6_get_block); +} + +static int qnx6_readpages(struct file *file, struct address_space *mapping, + struct list_head *pages, unsigned nr_pages) +{ + return mpage_readpages(mapping, pages, nr_pages, qnx6_get_block); +} + +/* + * returns the block number for the no-th element in the tree + * inodebits requred as there are multiple inodes in one inode block + */ +static unsigned qnx6_block_map(struct inode *inode, unsigned no) +{ + struct super_block *s = inode->i_sb; + struct qnx6_sb_info *sbi = QNX6_SB(s); + struct qnx6_inode_info *ei = QNX6_I(inode); + unsigned block = 0; + struct buffer_head *bh; + __fs32 ptr; + int levelptr; + int ptrbits = sbi->s_ptrbits; + int bitdelta; + u32 mask = (1 << ptrbits) - 1; + int depth = ei->di_filelevels; + int i; + + bitdelta = ptrbits * depth; + levelptr = no >> bitdelta; + + if (levelptr > QNX6_NO_DIRECT_POINTERS - 1) { + printk(KERN_ERR "qnx6:Requested file block number (%u) too big.", + no); + return 0; + } + + block = qnx6_get_devblock(s, ei->di_block_ptr[levelptr]); + + for (i = 0; i < depth; i++) { + bh = sb_bread(s, block); + if (!bh) { + printk(KERN_ERR "qnx6:Error reading block (%u)\n", + block); + return 0; + } + bitdelta -= ptrbits; + levelptr = (no >> bitdelta) & mask; + ptr = ((__fs32 *)bh->b_data)[levelptr]; + + if (!qnx6_check_blockptr(ptr)) + return 0; + + block = qnx6_get_devblock(s, ptr); + brelse(bh); + } + return block; +} + +static int qnx6_statfs(struct dentry *dentry, struct kstatfs *buf) +{ + struct super_block *sb = dentry->d_sb; + struct qnx6_sb_info *sbi = QNX6_SB(sb); + u64 id = huge_encode_dev(sb->s_bdev->bd_dev); + + buf->f_type = sb->s_magic; + buf->f_bsize = sb->s_blocksize; + buf->f_blocks = fs32_to_cpu(sbi, sbi->sb->sb_num_blocks); + buf->f_bfree = fs32_to_cpu(sbi, sbi->sb->sb_free_blocks); + buf->f_files = fs32_to_cpu(sbi, sbi->sb->sb_num_inodes); + buf->f_ffree = fs32_to_cpu(sbi, sbi->sb->sb_free_inodes); + buf->f_bavail = buf->f_bfree; + buf->f_namelen = QNX6_LONG_NAME_MAX; + buf->f_fsid.val[0] = (u32)id; + buf->f_fsid.val[1] = (u32)(id >> 32); + + return 0; +} + +/* + * Check the root directory of the filesystem to make sure + * it really _is_ a qnx6 filesystem, and to check the size + * of the directory entry. + */ +static const char *qnx6_checkroot(struct super_block *s) +{ + static char match_root[2][3] = {".\0\0", "..\0"}; + int i, error = 0; + struct qnx6_dir_entry *dir_entry; + struct inode *root = s->s_root->d_inode; + struct address_space *mapping = root->i_mapping; + struct page *page = read_mapping_page(mapping, 0, NULL); + if (IS_ERR(page)) + return "error reading root directory"; + kmap(page); + dir_entry = page_address(page); + for (i = 0; i < 2; i++) { + /* maximum 3 bytes - due to match_root limitation */ + if (strncmp(dir_entry[i].de_fname, match_root[i], 3)) + error = 1; + } + qnx6_put_page(page); + if (error) + return "error reading root directory."; + return NULL; +} + +#ifdef CONFIG_QNX6FS_DEBUG +void qnx6_superblock_debug(struct qnx6_super_block *sb, struct super_block *s) +{ + struct qnx6_sb_info *sbi = QNX6_SB(s); + + QNX6DEBUG((KERN_INFO "magic: %08x\n", + fs32_to_cpu(sbi, sb->sb_magic))); + QNX6DEBUG((KERN_INFO "checksum: %08x\n", + fs32_to_cpu(sbi, sb->sb_checksum))); + QNX6DEBUG((KERN_INFO "serial: %llx\n", + fs64_to_cpu(sbi, sb->sb_serial))); + QNX6DEBUG((KERN_INFO "flags: %08x\n", + fs32_to_cpu(sbi, sb->sb_flags))); + QNX6DEBUG((KERN_INFO "blocksize: %08x\n", + fs32_to_cpu(sbi, sb->sb_blocksize))); + QNX6DEBUG((KERN_INFO "num_inodes: %08x\n", + fs32_to_cpu(sbi, sb->sb_num_inodes))); + QNX6DEBUG((KERN_INFO "free_inodes: %08x\n", + fs32_to_cpu(sbi, sb->sb_free_inodes))); + QNX6DEBUG((KERN_INFO "num_blocks: %08x\n", + fs32_to_cpu(sbi, sb->sb_num_blocks))); + QNX6DEBUG((KERN_INFO "free_blocks: %08x\n", + fs32_to_cpu(sbi, sb->sb_free_blocks))); + QNX6DEBUG((KERN_INFO "inode_levels: %02x\n", + sb->Inode.levels)); +} +#endif + +enum { + Opt_mmifs, + Opt_err +}; + +static const match_table_t tokens = { + {Opt_mmifs, "mmi_fs"}, + {Opt_err, NULL} +}; + +static int qnx6_parse_options(char *options, struct super_block *sb) +{ + char *p; + struct qnx6_sb_info *sbi = QNX6_SB(sb); + substring_t args[MAX_OPT_ARGS]; + + if (!options) + return 1; + + while ((p = strsep(&options, ",")) != NULL) { + int token; + if (!*p) + continue; + + token = match_token(p, tokens, args); + switch (token) { + case Opt_mmifs: + set_opt(sbi->s_mount_opt, MMI_FS); + break; + default: + return 0; + } + } + return 1; +} + +static struct buffer_head *qnx6_check_first_superblock(struct super_block *s, + int offset, int silent) +{ + struct qnx6_sb_info *sbi = QNX6_SB(s); + struct buffer_head *bh; + struct qnx6_super_block *sb; + + /* Check the superblock signatures + start with the first superblock */ + bh = sb_bread(s, offset); + if (!bh) { + printk(KERN_ERR "qnx6: unable to read the first superblock\n"); + return NULL; + } + sb = (struct qnx6_super_block *)bh->b_data; + if (fs32_to_cpu(sbi, sb->sb_magic) != QNX6_SUPER_MAGIC) { + sbi->s_bytesex = BYTESEX_BE; + if (fs32_to_cpu(sbi, sb->sb_magic) == QNX6_SUPER_MAGIC) { + /* we got a big endian fs */ + QNX6DEBUG((KERN_INFO "qnx6: fs got different" + " endianess.\n")); + return bh; + } else + sbi->s_bytesex = BYTESEX_LE; + if (!silent) { + if (offset == 0) { + printk(KERN_ERR "qnx6: wrong signature (magic)" + " in superblock #1.\n"); + } else { + printk(KERN_INFO "qnx6: wrong signature (magic)" + " at position (0x%lx) - will try" + " alternative position (0x0000).\n", + offset * s->s_blocksize); + } + } + brelse(bh); + return NULL; + } + return bh; +} + +static struct inode *qnx6_private_inode(struct super_block *s, + struct qnx6_root_node *p); + +static int qnx6_fill_super(struct super_block *s, void *data, int silent) +{ + struct buffer_head *bh1 = NULL, *bh2 = NULL; + struct qnx6_super_block *sb1 = NULL, *sb2 = NULL; + struct qnx6_sb_info *sbi; + struct inode *root; + const char *errmsg; + struct qnx6_sb_info *qs; + int ret = -EINVAL; + u64 offset; + int bootblock_offset = QNX6_BOOTBLOCK_SIZE; + + qs = kzalloc(sizeof(struct qnx6_sb_info), GFP_KERNEL); + if (!qs) + return -ENOMEM; + s->s_fs_info = qs; + + /* Superblock always is 512 Byte long */ + if (!sb_set_blocksize(s, QNX6_SUPERBLOCK_SIZE)) { + printk(KERN_ERR "qnx6: unable to set blocksize\n"); + goto outnobh; + } + + /* parse the mount-options */ + if (!qnx6_parse_options((char *) data, s)) { + printk(KERN_ERR "qnx6: invalid mount options.\n"); + goto outnobh; + } + if (test_opt(s, MMI_FS)) { + sb1 = qnx6_mmi_fill_super(s, silent); + if (sb1) + goto mmi_success; + else + goto outnobh; + } + sbi = QNX6_SB(s); + sbi->s_bytesex = BYTESEX_LE; + /* Check the superblock signatures + start with the first superblock */ + bh1 = qnx6_check_first_superblock(s, + bootblock_offset / QNX6_SUPERBLOCK_SIZE, silent); + if (!bh1) { + /* try again without bootblock offset */ + bh1 = qnx6_check_first_superblock(s, 0, silent); + if (!bh1) { + printk(KERN_ERR "qnx6: unable to read the first superblock\n"); + goto outnobh; + } + /* seems that no bootblock at partition start */ + bootblock_offset = 0; + } + sb1 = (struct qnx6_super_block *)bh1->b_data; + +#ifdef CONFIG_QNX6FS_DEBUG + qnx6_superblock_debug(sb1, s); +#endif + + /* checksum check - start at byte 8 and end at byte 512 */ + if (fs32_to_cpu(sbi, sb1->sb_checksum) != + crc32_be(0, (char *)(bh1->b_data + 8), 504)) { + printk(KERN_ERR "qnx6: superblock #1 checksum error\n"); + goto out; + } + + /* set new blocksize */ + if (!sb_set_blocksize(s, fs32_to_cpu(sbi, sb1->sb_blocksize))) { + printk(KERN_ERR "qnx6: unable to set blocksize\n"); + goto out; + } + /* blocksize invalidates bh - pull it back in */ + brelse(bh1); + bh1 = sb_bread(s, bootblock_offset >> s->s_blocksize_bits); + if (!bh1) + goto outnobh; + sb1 = (struct qnx6_super_block *)bh1->b_data; + + /* calculate second superblock blocknumber */ + offset = fs32_to_cpu(sbi, sb1->sb_num_blocks) + + (bootblock_offset >> s->s_blocksize_bits) + + (QNX6_SUPERBLOCK_AREA >> s->s_blocksize_bits); + + /* set bootblock offset */ + sbi->s_blks_off = (bootblock_offset >> s->s_blocksize_bits) + + (QNX6_SUPERBLOCK_AREA >> s->s_blocksize_bits); + + /* next the second superblock */ + bh2 = sb_bread(s, offset); + if (!bh2) { + printk(KERN_ERR "qnx6: unable to read the second superblock\n"); + goto out; + } + sb2 = (struct qnx6_super_block *)bh2->b_data; + if (fs32_to_cpu(sbi, sb2->sb_magic) != QNX6_SUPER_MAGIC) { + if (!silent) + printk(KERN_ERR "qnx6: wrong signature (magic)" + " in superblock #2.\n"); + goto out; + } + + /* checksum check - start at byte 8 and end at byte 512 */ + if (fs32_to_cpu(sbi, sb2->sb_checksum) != + crc32_be(0, (char *)(bh2->b_data + 8), 504)) { + printk(KERN_ERR "qnx6: superblock #2 checksum error\n"); + goto out; + } + + if (fs64_to_cpu(sbi, sb1->sb_serial) >= + fs64_to_cpu(sbi, sb2->sb_serial)) { + /* superblock #1 active */ + sbi->sb_buf = bh1; + sbi->sb = (struct qnx6_super_block *)bh1->b_data; + brelse(bh2); + printk(KERN_INFO "qnx6: superblock #1 active\n"); + } else { + /* superblock #2 active */ + sbi->sb_buf = bh2; + sbi->sb = (struct qnx6_super_block *)bh2->b_data; + brelse(bh1); + printk(KERN_INFO "qnx6: superblock #2 active\n"); + } +mmi_success: + /* sanity check - limit maximum indirect pointer levels */ + if (sb1->Inode.levels > QNX6_PTR_MAX_LEVELS) { + printk(KERN_ERR "qnx6: too many inode levels (max %i, sb %i)\n", + QNX6_PTR_MAX_LEVELS, sb1->Inode.levels); + goto out; + } + if (sb1->Longfile.levels > QNX6_PTR_MAX_LEVELS) { + printk(KERN_ERR "qnx6: too many longfilename levels" + " (max %i, sb %i)\n", + QNX6_PTR_MAX_LEVELS, sb1->Longfile.levels); + goto out; + } + s->s_op = &qnx6_sops; + s->s_magic = QNX6_SUPER_MAGIC; + s->s_flags |= MS_RDONLY; /* Yup, read-only yet */ + + /* ease the later tree level calculations */ + sbi = QNX6_SB(s); + sbi->s_ptrbits = ilog2(s->s_blocksize / 4); + sbi->inodes = qnx6_private_inode(s, &sb1->Inode); + if (!sbi->inodes) + goto out; + sbi->longfile = qnx6_private_inode(s, &sb1->Longfile); + if (!sbi->longfile) + goto out1; + + /* prefetch root inode */ + root = qnx6_iget(s, QNX6_ROOT_INO); + if (IS_ERR(root)) { + printk(KERN_ERR "qnx6: get inode failed\n"); + ret = PTR_ERR(root); + goto out2; + } + + ret = -ENOMEM; + s->s_root = d_make_root(root); + if (!s->s_root) + goto out2; + + ret = -EINVAL; + errmsg = qnx6_checkroot(s); + if (errmsg != NULL) { + if (!silent) + printk(KERN_ERR "qnx6: %s\n", errmsg); + goto out3; + } + return 0; + +out3: + dput(s->s_root); + s->s_root = NULL; +out2: + iput(sbi->longfile); +out1: + iput(sbi->inodes); +out: + if (bh1) + brelse(bh1); + if (bh2) + brelse(bh2); +outnobh: + kfree(qs); + s->s_fs_info = NULL; + return ret; +} + +static void qnx6_put_super(struct super_block *sb) +{ + struct qnx6_sb_info *qs = QNX6_SB(sb); + brelse(qs->sb_buf); + iput(qs->longfile); + iput(qs->inodes); + kfree(qs); + sb->s_fs_info = NULL; + return; +} + +static sector_t qnx6_bmap(struct address_space *mapping, sector_t block) +{ + return generic_block_bmap(mapping, block, qnx6_get_block); +} +static const struct address_space_operations qnx6_aops = { + .readpage = qnx6_readpage, + .readpages = qnx6_readpages, + .bmap = qnx6_bmap +}; + +static struct inode *qnx6_private_inode(struct super_block *s, + struct qnx6_root_node *p) +{ + struct inode *inode = new_inode(s); + if (inode) { + struct qnx6_inode_info *ei = QNX6_I(inode); + struct qnx6_sb_info *sbi = QNX6_SB(s); + inode->i_size = fs64_to_cpu(sbi, p->size); + memcpy(ei->di_block_ptr, p->ptr, sizeof(p->ptr)); + ei->di_filelevels = p->levels; + inode->i_mode = S_IFREG | S_IRUSR; /* probably wrong */ + inode->i_mapping->a_ops = &qnx6_aops; + } + return inode; +} + +struct inode *qnx6_iget(struct super_block *sb, unsigned ino) +{ + struct qnx6_sb_info *sbi = QNX6_SB(sb); + struct qnx6_inode_entry *raw_inode; + struct inode *inode; + struct qnx6_inode_info *ei; + struct address_space *mapping; + struct page *page; + u32 n, offs; + + inode = iget_locked(sb, ino); + if (!inode) + return ERR_PTR(-ENOMEM); + if (!(inode->i_state & I_NEW)) + return inode; + + ei = QNX6_I(inode); + + inode->i_mode = 0; + + if (ino == 0) { + printk(KERN_ERR "qnx6: bad inode number on dev %s: %u is " + "out of range\n", + sb->s_id, ino); + iget_failed(inode); + return ERR_PTR(-EIO); + } + n = (ino - 1) >> (PAGE_CACHE_SHIFT - QNX6_INODE_SIZE_BITS); + offs = (ino - 1) & (~PAGE_CACHE_MASK >> QNX6_INODE_SIZE_BITS); + mapping = sbi->inodes->i_mapping; + page = read_mapping_page(mapping, n, NULL); + if (IS_ERR(page)) { + printk(KERN_ERR "qnx6: major problem: unable to read inode from " + "dev %s\n", sb->s_id); + iget_failed(inode); + return ERR_CAST(page); + } + kmap(page); + raw_inode = ((struct qnx6_inode_entry *)page_address(page)) + offs; + + inode->i_mode = fs16_to_cpu(sbi, raw_inode->di_mode); + inode->i_uid = (uid_t)fs32_to_cpu(sbi, raw_inode->di_uid); + inode->i_gid = (gid_t)fs32_to_cpu(sbi, raw_inode->di_gid); + inode->i_size = fs64_to_cpu(sbi, raw_inode->di_size); + inode->i_mtime.tv_sec = fs32_to_cpu(sbi, raw_inode->di_mtime); + inode->i_mtime.tv_nsec = 0; + inode->i_atime.tv_sec = fs32_to_cpu(sbi, raw_inode->di_atime); + inode->i_atime.tv_nsec = 0; + inode->i_ctime.tv_sec = fs32_to_cpu(sbi, raw_inode->di_ctime); + inode->i_ctime.tv_nsec = 0; + + /* calc blocks based on 512 byte blocksize */ + inode->i_blocks = (inode->i_size + 511) >> 9; + + memcpy(&ei->di_block_ptr, &raw_inode->di_block_ptr, + sizeof(raw_inode->di_block_ptr)); + ei->di_filelevels = raw_inode->di_filelevels; + + if (S_ISREG(inode->i_mode)) { + inode->i_fop = &generic_ro_fops; + inode->i_mapping->a_ops = &qnx6_aops; + } else if (S_ISDIR(inode->i_mode)) { + inode->i_op = &qnx6_dir_inode_operations; + inode->i_fop = &qnx6_dir_operations; + inode->i_mapping->a_ops = &qnx6_aops; + } else if (S_ISLNK(inode->i_mode)) { + inode->i_op = &page_symlink_inode_operations; + inode->i_mapping->a_ops = &qnx6_aops; + } else + init_special_inode(inode, inode->i_mode, 0); + qnx6_put_page(page); + unlock_new_inode(inode); + return inode; +} + +static struct kmem_cache *qnx6_inode_cachep; + +static struct inode *qnx6_alloc_inode(struct super_block *sb) +{ + struct qnx6_inode_info *ei; + ei = kmem_cache_alloc(qnx6_inode_cachep, GFP_KERNEL); + if (!ei) + return NULL; + return &ei->vfs_inode; +} + +static void qnx6_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(qnx6_inode_cachep, QNX6_I(inode)); +} + +static void qnx6_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, qnx6_i_callback); +} + +static void init_once(void *foo) +{ + struct qnx6_inode_info *ei = (struct qnx6_inode_info *) foo; + + inode_init_once(&ei->vfs_inode); +} + +static int init_inodecache(void) +{ + qnx6_inode_cachep = kmem_cache_create("qnx6_inode_cache", + sizeof(struct qnx6_inode_info), + 0, (SLAB_RECLAIM_ACCOUNT| + SLAB_MEM_SPREAD), + init_once); + if (!qnx6_inode_cachep) + return -ENOMEM; + return 0; +} + +static void destroy_inodecache(void) +{ + kmem_cache_destroy(qnx6_inode_cachep); +} + +static struct dentry *qnx6_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) +{ + return mount_bdev(fs_type, flags, dev_name, data, qnx6_fill_super); +} + +static struct file_system_type qnx6_fs_type = { + .owner = THIS_MODULE, + .name = "qnx6", + .mount = qnx6_mount, + .kill_sb = kill_block_super, + .fs_flags = FS_REQUIRES_DEV, +}; + +static int __init init_qnx6_fs(void) +{ + int err; + + err = init_inodecache(); + if (err) + return err; + + err = register_filesystem(&qnx6_fs_type); + if (err) { + destroy_inodecache(); + return err; + } + + printk(KERN_INFO "QNX6 filesystem 1.0.0 registered.\n"); + return 0; +} + +static void __exit exit_qnx6_fs(void) +{ + unregister_filesystem(&qnx6_fs_type); + destroy_inodecache(); +} + +module_init(init_qnx6_fs) +module_exit(exit_qnx6_fs) +MODULE_LICENSE("GPL"); diff --git a/fs/qnx6/namei.c b/fs/qnx6/namei.c new file mode 100644 index 00000000000..8a97289e04a --- /dev/null +++ b/fs/qnx6/namei.c @@ -0,0 +1,42 @@ +/* + * QNX6 file system, Linux implementation. + * + * Version : 1.0.0 + * + * History : + * + * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release. + * 16-02-2012 pagemap extension by Al Viro + * + */ + +#include "qnx6.h" + +struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry, + struct nameidata *nd) +{ + unsigned ino; + struct page *page; + struct inode *foundinode = NULL; + const char *name = dentry->d_name.name; + int len = dentry->d_name.len; + + if (len > QNX6_LONG_NAME_MAX) + return ERR_PTR(-ENAMETOOLONG); + + ino = qnx6_find_entry(len, dir, name, &page); + if (ino) { + foundinode = qnx6_iget(dir->i_sb, ino); + qnx6_put_page(page); + if (IS_ERR(foundinode)) { + QNX6DEBUG((KERN_ERR "qnx6: lookup->iget -> " + " error %ld\n", PTR_ERR(foundinode))); + return ERR_CAST(foundinode); + } + } else { + QNX6DEBUG((KERN_INFO "qnx6_lookup: not found %s\n", name)); + return NULL; + } + d_add(dentry, foundinode); + return NULL; +} diff --git a/fs/qnx6/qnx6.h b/fs/qnx6/qnx6.h new file mode 100644 index 00000000000..6c5e02a0b6a --- /dev/null +++ b/fs/qnx6/qnx6.h @@ -0,0 +1,135 @@ +/* + * QNX6 file system, Linux implementation. + * + * Version : 1.0.0 + * + * History : + * + * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release. + * 16-02-2012 page map extension by Al Viro + * + */ + +#include <linux/fs.h> +#include <linux/pagemap.h> + +typedef __u16 __bitwise __fs16; +typedef __u32 __bitwise __fs32; +typedef __u64 __bitwise __fs64; + +#include <linux/qnx6_fs.h> + +#ifdef CONFIG_QNX6FS_DEBUG +#define QNX6DEBUG(X) printk X +#else +#define QNX6DEBUG(X) (void) 0 +#endif + +struct qnx6_sb_info { + struct buffer_head *sb_buf; /* superblock buffer */ + struct qnx6_super_block *sb; /* our superblock */ + int s_blks_off; /* blkoffset fs-startpoint */ + int s_ptrbits; /* indirect pointer bitfield */ + unsigned long s_mount_opt; /* all mount options */ + int s_bytesex; /* holds endianess info */ + struct inode * inodes; + struct inode * longfile; +}; + +struct qnx6_inode_info { + __fs32 di_block_ptr[QNX6_NO_DIRECT_POINTERS]; + __u8 di_filelevels; + __u32 i_dir_start_lookup; + struct inode vfs_inode; +}; + +extern struct inode *qnx6_iget(struct super_block *sb, unsigned ino); +extern struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry, + struct nameidata *nd); + +#ifdef CONFIG_QNX6FS_DEBUG +extern void qnx6_superblock_debug(struct qnx6_super_block *, + struct super_block *); +#endif + +extern const struct inode_operations qnx6_dir_inode_operations; +extern const struct file_operations qnx6_dir_operations; + +static inline struct qnx6_sb_info *QNX6_SB(struct super_block *sb) +{ + return sb->s_fs_info; +} + +static inline struct qnx6_inode_info *QNX6_I(struct inode *inode) +{ + return container_of(inode, struct qnx6_inode_info, vfs_inode); +} + +#define clear_opt(o, opt) (o &= ~(QNX6_MOUNT_##opt)) +#define set_opt(o, opt) (o |= (QNX6_MOUNT_##opt)) +#define test_opt(sb, opt) (QNX6_SB(sb)->s_mount_opt & \ + QNX6_MOUNT_##opt) +enum { + BYTESEX_LE, + BYTESEX_BE, +}; + +static inline __u64 fs64_to_cpu(struct qnx6_sb_info *sbi, __fs64 n) +{ + if (sbi->s_bytesex == BYTESEX_LE) + return le64_to_cpu((__force __le64)n); + else + return be64_to_cpu((__force __be64)n); +} + +static inline __fs64 cpu_to_fs64(struct qnx6_sb_info *sbi, __u64 n) +{ + if (sbi->s_bytesex == BYTESEX_LE) + return (__force __fs64)cpu_to_le64(n); + else + return (__force __fs64)cpu_to_be64(n); +} + +static inline __u32 fs32_to_cpu(struct qnx6_sb_info *sbi, __fs32 n) +{ + if (sbi->s_bytesex == BYTESEX_LE) + return le32_to_cpu((__force __le32)n); + else + return be32_to_cpu((__force __be32)n); +} + +static inline __fs32 cpu_to_fs32(struct qnx6_sb_info *sbi, __u32 n) +{ + if (sbi->s_bytesex == BYTESEX_LE) + return (__force __fs32)cpu_to_le32(n); + else + return (__force __fs32)cpu_to_be32(n); +} + +static inline __u16 fs16_to_cpu(struct qnx6_sb_info *sbi, __fs16 n) +{ + if (sbi->s_bytesex == BYTESEX_LE) + return le16_to_cpu((__force __le16)n); + else + return be16_to_cpu((__force __be16)n); +} + +static inline __fs16 cpu_to_fs16(struct qnx6_sb_info *sbi, __u16 n) +{ + if (sbi->s_bytesex == BYTESEX_LE) + return (__force __fs16)cpu_to_le16(n); + else + return (__force __fs16)cpu_to_be16(n); +} + +extern struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s, + int silent); + +static inline void qnx6_put_page(struct page *page) +{ + kunmap(page); + page_cache_release(page); +} + +extern unsigned qnx6_find_entry(int len, struct inode *dir, const char *name, + struct page **res_page); diff --git a/fs/qnx6/super_mmi.c b/fs/qnx6/super_mmi.c new file mode 100644 index 00000000000..29c32cba62d --- /dev/null +++ b/fs/qnx6/super_mmi.c @@ -0,0 +1,150 @@ +/* + * QNX6 file system, Linux implementation. + * + * Version : 1.0.0 + * + * History : + * + * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release. + * + */ + +#include <linux/buffer_head.h> +#include <linux/slab.h> +#include <linux/crc32.h> +#include "qnx6.h" + +static void qnx6_mmi_copy_sb(struct qnx6_super_block *qsb, + struct qnx6_mmi_super_block *sb) +{ + qsb->sb_magic = sb->sb_magic; + qsb->sb_checksum = sb->sb_checksum; + qsb->sb_serial = sb->sb_serial; + qsb->sb_blocksize = sb->sb_blocksize; + qsb->sb_num_inodes = sb->sb_num_inodes; + qsb->sb_free_inodes = sb->sb_free_inodes; + qsb->sb_num_blocks = sb->sb_num_blocks; + qsb->sb_free_blocks = sb->sb_free_blocks; + + /* the rest of the superblock is the same */ + memcpy(&qsb->Inode, &sb->Inode, sizeof(sb->Inode)); + memcpy(&qsb->Bitmap, &sb->Bitmap, sizeof(sb->Bitmap)); + memcpy(&qsb->Longfile, &sb->Longfile, sizeof(sb->Longfile)); +} + +struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s, int silent) +{ + struct buffer_head *bh1, *bh2 = NULL; + struct qnx6_mmi_super_block *sb1, *sb2; + struct qnx6_super_block *qsb = NULL; + struct qnx6_sb_info *sbi; + __u64 offset; + + /* Check the superblock signatures + start with the first superblock */ + bh1 = sb_bread(s, 0); + if (!bh1) { + printk(KERN_ERR "qnx6: Unable to read first mmi superblock\n"); + return NULL; + } + sb1 = (struct qnx6_mmi_super_block *)bh1->b_data; + sbi = QNX6_SB(s); + if (fs32_to_cpu(sbi, sb1->sb_magic) != QNX6_SUPER_MAGIC) { + if (!silent) { + printk(KERN_ERR "qnx6: wrong signature (magic) in" + " superblock #1.\n"); + goto out; + } + } + + /* checksum check - start at byte 8 and end at byte 512 */ + if (fs32_to_cpu(sbi, sb1->sb_checksum) != + crc32_be(0, (char *)(bh1->b_data + 8), 504)) { + printk(KERN_ERR "qnx6: superblock #1 checksum error\n"); + goto out; + } + + /* calculate second superblock blocknumber */ + offset = fs32_to_cpu(sbi, sb1->sb_num_blocks) + QNX6_SUPERBLOCK_AREA / + fs32_to_cpu(sbi, sb1->sb_blocksize); + + /* set new blocksize */ + if (!sb_set_blocksize(s, fs32_to_cpu(sbi, sb1->sb_blocksize))) { + printk(KERN_ERR "qnx6: unable to set blocksize\n"); + goto out; + } + /* blocksize invalidates bh - pull it back in */ + brelse(bh1); + bh1 = sb_bread(s, 0); + if (!bh1) + goto out; + sb1 = (struct qnx6_mmi_super_block *)bh1->b_data; + + /* read second superblock */ + bh2 = sb_bread(s, offset); + if (!bh2) { + printk(KERN_ERR "qnx6: unable to read the second superblock\n"); + goto out; + } + sb2 = (struct qnx6_mmi_super_block *)bh2->b_data; + if (fs32_to_cpu(sbi, sb2->sb_magic) != QNX6_SUPER_MAGIC) { + if (!silent) + printk(KERN_ERR "qnx6: wrong signature (magic) in" + " superblock #2.\n"); + goto out; + } + + /* checksum check - start at byte 8 and end at byte 512 */ + if (fs32_to_cpu(sbi, sb2->sb_checksum) + != crc32_be(0, (char *)(bh2->b_data + 8), 504)) { + printk(KERN_ERR "qnx6: superblock #1 checksum error\n"); + goto out; + } + + qsb = kmalloc(sizeof(*qsb), GFP_KERNEL); + if (!qsb) { + printk(KERN_ERR "qnx6: unable to allocate memory.\n"); + goto out; + } + + if (fs64_to_cpu(sbi, sb1->sb_serial) > + fs64_to_cpu(sbi, sb2->sb_serial)) { + /* superblock #1 active */ + qnx6_mmi_copy_sb(qsb, sb1); +#ifdef CONFIG_QNX6FS_DEBUG + qnx6_superblock_debug(qsb, s); +#endif + memcpy(bh1->b_data, qsb, sizeof(struct qnx6_super_block)); + + sbi->sb_buf = bh1; + sbi->sb = (struct qnx6_super_block *)bh1->b_data; + brelse(bh2); + printk(KERN_INFO "qnx6: superblock #1 active\n"); + } else { + /* superblock #2 active */ + qnx6_mmi_copy_sb(qsb, sb2); +#ifdef CONFIG_QNX6FS_DEBUG + qnx6_superblock_debug(qsb, s); +#endif + memcpy(bh2->b_data, qsb, sizeof(struct qnx6_super_block)); + + sbi->sb_buf = bh2; + sbi->sb = (struct qnx6_super_block *)bh2->b_data; + brelse(bh1); + printk(KERN_INFO "qnx6: superblock #2 active\n"); + } + kfree(qsb); + + /* offset for mmi_fs is just SUPERBLOCK_AREA bytes */ + sbi->s_blks_off = QNX6_SUPERBLOCK_AREA / s->s_blocksize; + + /* success */ + return sbi->sb; + +out: + if (bh1 != NULL) + brelse(bh1); + if (bh2 != NULL) + brelse(bh2); + return NULL; +} diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c index aec766abe3a..a1fdabe21de 100644 --- a/fs/ramfs/inode.c +++ b/fs/ramfs/inode.c @@ -209,22 +209,19 @@ static int ramfs_parse_options(char *data, struct ramfs_mount_opts *opts) int ramfs_fill_super(struct super_block *sb, void *data, int silent) { struct ramfs_fs_info *fsi; - struct inode *inode = NULL; - struct dentry *root; + struct inode *inode; int err; save_mount_options(sb, data); fsi = kzalloc(sizeof(struct ramfs_fs_info), GFP_KERNEL); sb->s_fs_info = fsi; - if (!fsi) { - err = -ENOMEM; - goto fail; - } + if (!fsi) + return -ENOMEM; err = ramfs_parse_options(data, &fsi->mount_opts); if (err) - goto fail; + return err; sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_blocksize = PAGE_CACHE_SIZE; @@ -234,24 +231,11 @@ int ramfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_time_gran = 1; inode = ramfs_get_inode(sb, NULL, S_IFDIR | fsi->mount_opts.mode, 0); - if (!inode) { - err = -ENOMEM; - goto fail; - } - - root = d_alloc_root(inode); - sb->s_root = root; - if (!root) { - err = -ENOMEM; - goto fail; - } + sb->s_root = d_make_root(inode); + if (!sb->s_root) + return -ENOMEM; return 0; -fail: - kfree(fsi); - sb->s_fs_info = NULL; - iput(inode); - return err; } struct dentry *ramfs_mount(struct file_system_type *fs_type, diff --git a/fs/reiserfs/acl.h b/fs/reiserfs/acl.h new file mode 100644 index 00000000000..f096b80e73d --- /dev/null +++ b/fs/reiserfs/acl.h @@ -0,0 +1,76 @@ +#include <linux/init.h> +#include <linux/posix_acl.h> + +#define REISERFS_ACL_VERSION 0x0001 + +typedef struct { + __le16 e_tag; + __le16 e_perm; + __le32 e_id; +} reiserfs_acl_entry; + +typedef struct { + __le16 e_tag; + __le16 e_perm; +} reiserfs_acl_entry_short; + +typedef struct { + __le32 a_version; +} reiserfs_acl_header; + +static inline size_t reiserfs_acl_size(int count) +{ + if (count <= 4) { + return sizeof(reiserfs_acl_header) + + count * sizeof(reiserfs_acl_entry_short); + } else { + return sizeof(reiserfs_acl_header) + + 4 * sizeof(reiserfs_acl_entry_short) + + (count - 4) * sizeof(reiserfs_acl_entry); + } +} + +static inline int reiserfs_acl_count(size_t size) +{ + ssize_t s; + size -= sizeof(reiserfs_acl_header); + s = size - 4 * sizeof(reiserfs_acl_entry_short); + if (s < 0) { + if (size % sizeof(reiserfs_acl_entry_short)) + return -1; + return size / sizeof(reiserfs_acl_entry_short); + } else { + if (s % sizeof(reiserfs_acl_entry)) + return -1; + return s / sizeof(reiserfs_acl_entry) + 4; + } +} + +#ifdef CONFIG_REISERFS_FS_POSIX_ACL +struct posix_acl *reiserfs_get_acl(struct inode *inode, int type); +int reiserfs_acl_chmod(struct inode *inode); +int reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th, + struct inode *dir, struct dentry *dentry, + struct inode *inode); +int reiserfs_cache_default_acl(struct inode *dir); +extern const struct xattr_handler reiserfs_posix_acl_default_handler; +extern const struct xattr_handler reiserfs_posix_acl_access_handler; + +#else + +#define reiserfs_cache_default_acl(inode) 0 +#define reiserfs_get_acl NULL + +static inline int reiserfs_acl_chmod(struct inode *inode) +{ + return 0; +} + +static inline int +reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th, + const struct inode *dir, struct dentry *dentry, + struct inode *inode) +{ + return 0; +} +#endif diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c index 70de42f09f1..4c0c7d163d1 100644 --- a/fs/reiserfs/bitmap.c +++ b/fs/reiserfs/bitmap.c @@ -4,14 +4,12 @@ /* Reiserfs block (de)allocator, bitmap-based. */ #include <linux/time.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/errno.h> #include <linux/buffer_head.h> #include <linux/kernel.h> #include <linux/pagemap.h> #include <linux/vmalloc.h> -#include <linux/reiserfs_fs_sb.h> -#include <linux/reiserfs_fs_i.h> #include <linux/quotaops.h> #include <linux/seq_file.h> diff --git a/fs/reiserfs/dir.c b/fs/reiserfs/dir.c index 133e9355dc6..66c53b642a8 100644 --- a/fs/reiserfs/dir.c +++ b/fs/reiserfs/dir.c @@ -5,7 +5,7 @@ #include <linux/string.h> #include <linux/errno.h> #include <linux/fs.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/stat.h> #include <linux/buffer_head.h> #include <linux/slab.h> diff --git a/fs/reiserfs/do_balan.c b/fs/reiserfs/do_balan.c index 60c08044066..2b7882b508d 100644 --- a/fs/reiserfs/do_balan.c +++ b/fs/reiserfs/do_balan.c @@ -17,7 +17,7 @@ #include <asm/uaccess.h> #include <linux/time.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/buffer_head.h> #include <linux/kernel.h> diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c index ace635053a3..8375c922c0d 100644 --- a/fs/reiserfs/file.c +++ b/fs/reiserfs/file.c @@ -3,9 +3,9 @@ */ #include <linux/time.h> -#include <linux/reiserfs_fs.h> -#include <linux/reiserfs_acl.h> -#include <linux/reiserfs_xattr.h> +#include "reiserfs.h" +#include "acl.h" +#include "xattr.h" #include <asm/uaccess.h> #include <linux/pagemap.h> #include <linux/swap.h> diff --git a/fs/reiserfs/fix_node.c b/fs/reiserfs/fix_node.c index 1e4250bc3a6..430e0658704 100644 --- a/fs/reiserfs/fix_node.c +++ b/fs/reiserfs/fix_node.c @@ -37,7 +37,7 @@ #include <linux/time.h> #include <linux/slab.h> #include <linux/string.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/buffer_head.h> /* To make any changes in the tree we find a node, that contains item diff --git a/fs/reiserfs/hashes.c b/fs/reiserfs/hashes.c index 6471c670743..91b0cc1242a 100644 --- a/fs/reiserfs/hashes.c +++ b/fs/reiserfs/hashes.c @@ -19,7 +19,7 @@ // #include <linux/kernel.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <asm/types.h> #define DELTA 0x9E3779B9 diff --git a/fs/reiserfs/ibalance.c b/fs/reiserfs/ibalance.c index 2074fd95046..e1978fd895f 100644 --- a/fs/reiserfs/ibalance.c +++ b/fs/reiserfs/ibalance.c @@ -5,7 +5,7 @@ #include <asm/uaccess.h> #include <linux/string.h> #include <linux/time.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/buffer_head.h> /* this is one and only function that is used outside (do_balance.c) */ diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c index 9e8cd5acd79..494c315c741 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -4,9 +4,9 @@ #include <linux/time.h> #include <linux/fs.h> -#include <linux/reiserfs_fs.h> -#include <linux/reiserfs_acl.h> -#include <linux/reiserfs_xattr.h> +#include "reiserfs.h" +#include "acl.h" +#include "xattr.h" #include <linux/exportfs.h> #include <linux/pagemap.h> #include <linux/highmem.h> diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c index 950e3d1b5c9..0c2185042d5 100644 --- a/fs/reiserfs/ioctl.c +++ b/fs/reiserfs/ioctl.c @@ -5,7 +5,7 @@ #include <linux/capability.h> #include <linux/fs.h> #include <linux/mount.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/time.h> #include <asm/uaccess.h> #include <linux/pagemap.h> diff --git a/fs/reiserfs/item_ops.c b/fs/reiserfs/item_ops.c index 72cb1cc51b8..ee382ef3d30 100644 --- a/fs/reiserfs/item_ops.c +++ b/fs/reiserfs/item_ops.c @@ -3,7 +3,7 @@ */ #include <linux/time.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" // this contains item handlers for old item types: sd, direct, // indirect, directory diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c index c3cf54fd4de..cf9f4de00a9 100644 --- a/fs/reiserfs/journal.c +++ b/fs/reiserfs/journal.c @@ -37,7 +37,7 @@ #include <linux/time.h> #include <linux/semaphore.h> #include <linux/vmalloc.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/kernel.h> #include <linux/errno.h> #include <linux/fcntl.h> diff --git a/fs/reiserfs/lbalance.c b/fs/reiserfs/lbalance.c index b43d0155631..79e5a8b4c22 100644 --- a/fs/reiserfs/lbalance.c +++ b/fs/reiserfs/lbalance.c @@ -5,7 +5,7 @@ #include <asm/uaccess.h> #include <linux/string.h> #include <linux/time.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/buffer_head.h> /* these are used in do_balance.c */ diff --git a/fs/reiserfs/lock.c b/fs/reiserfs/lock.c index 7df1ce48203..d735bc8470e 100644 --- a/fs/reiserfs/lock.c +++ b/fs/reiserfs/lock.c @@ -1,4 +1,4 @@ -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/mutex.h> /* diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c index 14637886523..84e8a69cee9 100644 --- a/fs/reiserfs/namei.c +++ b/fs/reiserfs/namei.c @@ -14,9 +14,9 @@ #include <linux/time.h> #include <linux/bitops.h> #include <linux/slab.h> -#include <linux/reiserfs_fs.h> -#include <linux/reiserfs_acl.h> -#include <linux/reiserfs_xattr.h> +#include "reiserfs.h" +#include "acl.h" +#include "xattr.h" #include <linux/quotaops.h> #define INC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) { inc_nlink(i); if (i->i_nlink >= REISERFS_LINK_MAX) set_nlink(i, 1); } diff --git a/fs/reiserfs/objectid.c b/fs/reiserfs/objectid.c index 3a6de810bd6..f732d6a5251 100644 --- a/fs/reiserfs/objectid.c +++ b/fs/reiserfs/objectid.c @@ -5,8 +5,7 @@ #include <linux/string.h> #include <linux/random.h> #include <linux/time.h> -#include <linux/reiserfs_fs.h> -#include <linux/reiserfs_fs_sb.h> +#include "reiserfs.h" // find where objectid map starts #define objectid_map(s,rs) (old_format_only (s) ? \ diff --git a/fs/reiserfs/prints.c b/fs/reiserfs/prints.c index 45de98b5946..c0b1112ab7e 100644 --- a/fs/reiserfs/prints.c +++ b/fs/reiserfs/prints.c @@ -4,7 +4,7 @@ #include <linux/time.h> #include <linux/fs.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/string.h> #include <linux/buffer_head.h> @@ -329,7 +329,7 @@ void reiserfs_debug(struct super_block *s, int level, const char *fmt, ...) Numbering scheme for panic used by Vladimir and Anatoly( Hans completely ignores this scheme, and considers it pointless complexity): - panics in reiserfs_fs.h have numbers from 1000 to 1999 + panics in reiserfs.h have numbers from 1000 to 1999 super.c 2000 to 2999 preserve.c (unused) 3000 to 3999 bitmap.c 4000 to 4999 diff --git a/fs/reiserfs/procfs.c b/fs/reiserfs/procfs.c index 7a9981196c1..2c1ade692cc 100644 --- a/fs/reiserfs/procfs.c +++ b/fs/reiserfs/procfs.c @@ -12,8 +12,7 @@ #include <linux/time.h> #include <linux/seq_file.h> #include <asm/uaccess.h> -#include <linux/reiserfs_fs.h> -#include <linux/reiserfs_fs_sb.h> +#include "reiserfs.h" #include <linux/init.h> #include <linux/proc_fs.h> diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h new file mode 100644 index 00000000000..445d768eea4 --- /dev/null +++ b/fs/reiserfs/reiserfs.h @@ -0,0 +1,2922 @@ +/* + * Copyright 1996, 1997, 1998 Hans Reiser, see reiserfs/README for licensing and copyright details + */ + +#include <linux/reiserfs_fs.h> + +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/sched.h> +#include <linux/workqueue.h> +#include <asm/unaligned.h> +#include <linux/bitops.h> +#include <linux/proc_fs.h> +#include <linux/buffer_head.h> + +/* the 32 bit compat definitions with int argument */ +#define REISERFS_IOC32_UNPACK _IOW(0xCD, 1, int) +#define REISERFS_IOC32_GETFLAGS FS_IOC32_GETFLAGS +#define REISERFS_IOC32_SETFLAGS FS_IOC32_SETFLAGS +#define REISERFS_IOC32_GETVERSION FS_IOC32_GETVERSION +#define REISERFS_IOC32_SETVERSION FS_IOC32_SETVERSION + +struct reiserfs_journal_list; + +/** bitmasks for i_flags field in reiserfs-specific part of inode */ +typedef enum { + /** this says what format of key do all items (but stat data) of + an object have. If this is set, that format is 3.6 otherwise + - 3.5 */ + i_item_key_version_mask = 0x0001, + /** If this is unset, object has 3.5 stat data, otherwise, it has + 3.6 stat data with 64bit size, 32bit nlink etc. */ + i_stat_data_version_mask = 0x0002, + /** file might need tail packing on close */ + i_pack_on_close_mask = 0x0004, + /** don't pack tail of file */ + i_nopack_mask = 0x0008, + /** If those is set, "safe link" was created for this file during + truncate or unlink. Safe link is used to avoid leakage of disk + space on crash with some files open, but unlinked. */ + i_link_saved_unlink_mask = 0x0010, + i_link_saved_truncate_mask = 0x0020, + i_has_xattr_dir = 0x0040, + i_data_log = 0x0080, +} reiserfs_inode_flags; + +struct reiserfs_inode_info { + __u32 i_key[4]; /* key is still 4 32 bit integers */ + /** transient inode flags that are never stored on disk. Bitmasks + for this field are defined above. */ + __u32 i_flags; + + __u32 i_first_direct_byte; // offset of first byte stored in direct item. + + /* copy of persistent inode flags read from sd_attrs. */ + __u32 i_attrs; + + int i_prealloc_block; /* first unused block of a sequence of unused blocks */ + int i_prealloc_count; /* length of that sequence */ + struct list_head i_prealloc_list; /* per-transaction list of inodes which + * have preallocated blocks */ + + unsigned new_packing_locality:1; /* new_packig_locality is created; new blocks + * for the contents of this directory should be + * displaced */ + + /* we use these for fsync or O_SYNC to decide which transaction + ** needs to be committed in order for this inode to be properly + ** flushed */ + unsigned int i_trans_id; + struct reiserfs_journal_list *i_jl; + atomic_t openers; + struct mutex tailpack; +#ifdef CONFIG_REISERFS_FS_XATTR + struct rw_semaphore i_xattr_sem; +#endif + struct inode vfs_inode; +}; + +typedef enum { + reiserfs_attrs_cleared = 0x00000001, +} reiserfs_super_block_flags; + +/* struct reiserfs_super_block accessors/mutators + * since this is a disk structure, it will always be in + * little endian format. */ +#define sb_block_count(sbp) (le32_to_cpu((sbp)->s_v1.s_block_count)) +#define set_sb_block_count(sbp,v) ((sbp)->s_v1.s_block_count = cpu_to_le32(v)) +#define sb_free_blocks(sbp) (le32_to_cpu((sbp)->s_v1.s_free_blocks)) +#define set_sb_free_blocks(sbp,v) ((sbp)->s_v1.s_free_blocks = cpu_to_le32(v)) +#define sb_root_block(sbp) (le32_to_cpu((sbp)->s_v1.s_root_block)) +#define set_sb_root_block(sbp,v) ((sbp)->s_v1.s_root_block = cpu_to_le32(v)) + +#define sb_jp_journal_1st_block(sbp) \ + (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_1st_block)) +#define set_sb_jp_journal_1st_block(sbp,v) \ + ((sbp)->s_v1.s_journal.jp_journal_1st_block = cpu_to_le32(v)) +#define sb_jp_journal_dev(sbp) \ + (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_dev)) +#define set_sb_jp_journal_dev(sbp,v) \ + ((sbp)->s_v1.s_journal.jp_journal_dev = cpu_to_le32(v)) +#define sb_jp_journal_size(sbp) \ + (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_size)) +#define set_sb_jp_journal_size(sbp,v) \ + ((sbp)->s_v1.s_journal.jp_journal_size = cpu_to_le32(v)) +#define sb_jp_journal_trans_max(sbp) \ + (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_trans_max)) +#define set_sb_jp_journal_trans_max(sbp,v) \ + ((sbp)->s_v1.s_journal.jp_journal_trans_max = cpu_to_le32(v)) +#define sb_jp_journal_magic(sbp) \ + (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_magic)) +#define set_sb_jp_journal_magic(sbp,v) \ + ((sbp)->s_v1.s_journal.jp_journal_magic = cpu_to_le32(v)) +#define sb_jp_journal_max_batch(sbp) \ + (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_batch)) +#define set_sb_jp_journal_max_batch(sbp,v) \ + ((sbp)->s_v1.s_journal.jp_journal_max_batch = cpu_to_le32(v)) +#define sb_jp_jourmal_max_commit_age(sbp) \ + (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_commit_age)) +#define set_sb_jp_journal_max_commit_age(sbp,v) \ + ((sbp)->s_v1.s_journal.jp_journal_max_commit_age = cpu_to_le32(v)) + +#define sb_blocksize(sbp) (le16_to_cpu((sbp)->s_v1.s_blocksize)) +#define set_sb_blocksize(sbp,v) ((sbp)->s_v1.s_blocksize = cpu_to_le16(v)) +#define sb_oid_maxsize(sbp) (le16_to_cpu((sbp)->s_v1.s_oid_maxsize)) +#define set_sb_oid_maxsize(sbp,v) ((sbp)->s_v1.s_oid_maxsize = cpu_to_le16(v)) +#define sb_oid_cursize(sbp) (le16_to_cpu((sbp)->s_v1.s_oid_cursize)) +#define set_sb_oid_cursize(sbp,v) ((sbp)->s_v1.s_oid_cursize = cpu_to_le16(v)) +#define sb_umount_state(sbp) (le16_to_cpu((sbp)->s_v1.s_umount_state)) +#define set_sb_umount_state(sbp,v) ((sbp)->s_v1.s_umount_state = cpu_to_le16(v)) +#define sb_fs_state(sbp) (le16_to_cpu((sbp)->s_v1.s_fs_state)) +#define set_sb_fs_state(sbp,v) ((sbp)->s_v1.s_fs_state = cpu_to_le16(v)) +#define sb_hash_function_code(sbp) \ + (le32_to_cpu((sbp)->s_v1.s_hash_function_code)) +#define set_sb_hash_function_code(sbp,v) \ + ((sbp)->s_v1.s_hash_function_code = cpu_to_le32(v)) +#define sb_tree_height(sbp) (le16_to_cpu((sbp)->s_v1.s_tree_height)) +#define set_sb_tree_height(sbp,v) ((sbp)->s_v1.s_tree_height = cpu_to_le16(v)) +#define sb_bmap_nr(sbp) (le16_to_cpu((sbp)->s_v1.s_bmap_nr)) +#define set_sb_bmap_nr(sbp,v) ((sbp)->s_v1.s_bmap_nr = cpu_to_le16(v)) +#define sb_version(sbp) (le16_to_cpu((sbp)->s_v1.s_version)) +#define set_sb_version(sbp,v) ((sbp)->s_v1.s_version = cpu_to_le16(v)) + +#define sb_mnt_count(sbp) (le16_to_cpu((sbp)->s_mnt_count)) +#define set_sb_mnt_count(sbp, v) ((sbp)->s_mnt_count = cpu_to_le16(v)) + +#define sb_reserved_for_journal(sbp) \ + (le16_to_cpu((sbp)->s_v1.s_reserved_for_journal)) +#define set_sb_reserved_for_journal(sbp,v) \ + ((sbp)->s_v1.s_reserved_for_journal = cpu_to_le16(v)) + +/* LOGGING -- */ + +/* These all interelate for performance. +** +** If the journal block count is smaller than n transactions, you lose speed. +** I don't know what n is yet, I'm guessing 8-16. +** +** typical transaction size depends on the application, how often fsync is +** called, and how many metadata blocks you dirty in a 30 second period. +** The more small files (<16k) you use, the larger your transactions will +** be. +** +** If your journal fills faster than dirty buffers get flushed to disk, it must flush them before allowing the journal +** to wrap, which slows things down. If you need high speed meta data updates, the journal should be big enough +** to prevent wrapping before dirty meta blocks get to disk. +** +** If the batch max is smaller than the transaction max, you'll waste space at the end of the journal +** because journal_end sets the next transaction to start at 0 if the next transaction has any chance of wrapping. +** +** The large the batch max age, the better the speed, and the more meta data changes you'll lose after a crash. +** +*/ + +/* don't mess with these for a while */ + /* we have a node size define somewhere in reiserfs_fs.h. -Hans */ +#define JOURNAL_BLOCK_SIZE 4096 /* BUG gotta get rid of this */ +#define JOURNAL_MAX_CNODE 1500 /* max cnodes to allocate. */ +#define JOURNAL_HASH_SIZE 8192 +#define JOURNAL_NUM_BITMAPS 5 /* number of copies of the bitmaps to have floating. Must be >= 2 */ + +/* One of these for every block in every transaction +** Each one is in two hash tables. First, a hash of the current transaction, and after journal_end, a +** hash of all the in memory transactions. +** next and prev are used by the current transaction (journal_hash). +** hnext and hprev are used by journal_list_hash. If a block is in more than one transaction, the journal_list_hash +** links it in multiple times. This allows flush_journal_list to remove just the cnode belonging +** to a given transaction. +*/ +struct reiserfs_journal_cnode { + struct buffer_head *bh; /* real buffer head */ + struct super_block *sb; /* dev of real buffer head */ + __u32 blocknr; /* block number of real buffer head, == 0 when buffer on disk */ + unsigned long state; + struct reiserfs_journal_list *jlist; /* journal list this cnode lives in */ + struct reiserfs_journal_cnode *next; /* next in transaction list */ + struct reiserfs_journal_cnode *prev; /* prev in transaction list */ + struct reiserfs_journal_cnode *hprev; /* prev in hash list */ + struct reiserfs_journal_cnode *hnext; /* next in hash list */ +}; + +struct reiserfs_bitmap_node { + int id; + char *data; + struct list_head list; +}; + +struct reiserfs_list_bitmap { + struct reiserfs_journal_list *journal_list; + struct reiserfs_bitmap_node **bitmaps; +}; + +/* +** one of these for each transaction. The most important part here is the j_realblock. +** this list of cnodes is used to hash all the blocks in all the commits, to mark all the +** real buffer heads dirty once all the commits hit the disk, +** and to make sure every real block in a transaction is on disk before allowing the log area +** to be overwritten */ +struct reiserfs_journal_list { + unsigned long j_start; + unsigned long j_state; + unsigned long j_len; + atomic_t j_nonzerolen; + atomic_t j_commit_left; + atomic_t j_older_commits_done; /* all commits older than this on disk */ + struct mutex j_commit_mutex; + unsigned int j_trans_id; + time_t j_timestamp; + struct reiserfs_list_bitmap *j_list_bitmap; + struct buffer_head *j_commit_bh; /* commit buffer head */ + struct reiserfs_journal_cnode *j_realblock; + struct reiserfs_journal_cnode *j_freedlist; /* list of buffers that were freed during this trans. free each of these on flush */ + /* time ordered list of all active transactions */ + struct list_head j_list; + + /* time ordered list of all transactions we haven't tried to flush yet */ + struct list_head j_working_list; + + /* list of tail conversion targets in need of flush before commit */ + struct list_head j_tail_bh_list; + /* list of data=ordered buffers in need of flush before commit */ + struct list_head j_bh_list; + int j_refcount; +}; + +struct reiserfs_journal { + struct buffer_head **j_ap_blocks; /* journal blocks on disk */ + struct reiserfs_journal_cnode *j_last; /* newest journal block */ + struct reiserfs_journal_cnode *j_first; /* oldest journal block. start here for traverse */ + + struct block_device *j_dev_bd; + fmode_t j_dev_mode; + int j_1st_reserved_block; /* first block on s_dev of reserved area journal */ + + unsigned long j_state; + unsigned int j_trans_id; + unsigned long j_mount_id; + unsigned long j_start; /* start of current waiting commit (index into j_ap_blocks) */ + unsigned long j_len; /* length of current waiting commit */ + unsigned long j_len_alloc; /* number of buffers requested by journal_begin() */ + atomic_t j_wcount; /* count of writers for current commit */ + unsigned long j_bcount; /* batch count. allows turning X transactions into 1 */ + unsigned long j_first_unflushed_offset; /* first unflushed transactions offset */ + unsigned j_last_flush_trans_id; /* last fully flushed journal timestamp */ + struct buffer_head *j_header_bh; + + time_t j_trans_start_time; /* time this transaction started */ + struct mutex j_mutex; + struct mutex j_flush_mutex; + wait_queue_head_t j_join_wait; /* wait for current transaction to finish before starting new one */ + atomic_t j_jlock; /* lock for j_join_wait */ + int j_list_bitmap_index; /* number of next list bitmap to use */ + int j_must_wait; /* no more journal begins allowed. MUST sleep on j_join_wait */ + int j_next_full_flush; /* next journal_end will flush all journal list */ + int j_next_async_flush; /* next journal_end will flush all async commits */ + + int j_cnode_used; /* number of cnodes on the used list */ + int j_cnode_free; /* number of cnodes on the free list */ + + unsigned int j_trans_max; /* max number of blocks in a transaction. */ + unsigned int j_max_batch; /* max number of blocks to batch into a trans */ + unsigned int j_max_commit_age; /* in seconds, how old can an async commit be */ + unsigned int j_max_trans_age; /* in seconds, how old can a transaction be */ + unsigned int j_default_max_commit_age; /* the default for the max commit age */ + + struct reiserfs_journal_cnode *j_cnode_free_list; + struct reiserfs_journal_cnode *j_cnode_free_orig; /* orig pointer returned from vmalloc */ + + struct reiserfs_journal_list *j_current_jl; + int j_free_bitmap_nodes; + int j_used_bitmap_nodes; + + int j_num_lists; /* total number of active transactions */ + int j_num_work_lists; /* number that need attention from kreiserfsd */ + + /* debugging to make sure things are flushed in order */ + unsigned int j_last_flush_id; + + /* debugging to make sure things are committed in order */ + unsigned int j_last_commit_id; + + struct list_head j_bitmap_nodes; + struct list_head j_dirty_buffers; + spinlock_t j_dirty_buffers_lock; /* protects j_dirty_buffers */ + + /* list of all active transactions */ + struct list_head j_journal_list; + /* lists that haven't been touched by writeback attempts */ + struct list_head j_working_list; + + struct reiserfs_list_bitmap j_list_bitmap[JOURNAL_NUM_BITMAPS]; /* array of bitmaps to record the deleted blocks */ + struct reiserfs_journal_cnode *j_hash_table[JOURNAL_HASH_SIZE]; /* hash table for real buffer heads in current trans */ + struct reiserfs_journal_cnode *j_list_hash_table[JOURNAL_HASH_SIZE]; /* hash table for all the real buffer heads in all + the transactions */ + struct list_head j_prealloc_list; /* list of inodes which have preallocated blocks */ + int j_persistent_trans; + unsigned long j_max_trans_size; + unsigned long j_max_batch_size; + + int j_errno; + + /* when flushing ordered buffers, throttle new ordered writers */ + struct delayed_work j_work; + struct super_block *j_work_sb; + atomic_t j_async_throttle; +}; + +enum journal_state_bits { + J_WRITERS_BLOCKED = 1, /* set when new writers not allowed */ + J_WRITERS_QUEUED, /* set when log is full due to too many writers */ + J_ABORTED, /* set when log is aborted */ +}; + +#define JOURNAL_DESC_MAGIC "ReIsErLB" /* ick. magic string to find desc blocks in the journal */ + +typedef __u32(*hashf_t) (const signed char *, int); + +struct reiserfs_bitmap_info { + __u32 free_count; +}; + +struct proc_dir_entry; + +#if defined( CONFIG_PROC_FS ) && defined( CONFIG_REISERFS_PROC_INFO ) +typedef unsigned long int stat_cnt_t; +typedef struct reiserfs_proc_info_data { + spinlock_t lock; + int exiting; + int max_hash_collisions; + + stat_cnt_t breads; + stat_cnt_t bread_miss; + stat_cnt_t search_by_key; + stat_cnt_t search_by_key_fs_changed; + stat_cnt_t search_by_key_restarted; + + stat_cnt_t insert_item_restarted; + stat_cnt_t paste_into_item_restarted; + stat_cnt_t cut_from_item_restarted; + stat_cnt_t delete_solid_item_restarted; + stat_cnt_t delete_item_restarted; + + stat_cnt_t leaked_oid; + stat_cnt_t leaves_removable; + + /* balances per level. Use explicit 5 as MAX_HEIGHT is not visible yet. */ + stat_cnt_t balance_at[5]; /* XXX */ + /* sbk == search_by_key */ + stat_cnt_t sbk_read_at[5]; /* XXX */ + stat_cnt_t sbk_fs_changed[5]; + stat_cnt_t sbk_restarted[5]; + stat_cnt_t items_at[5]; /* XXX */ + stat_cnt_t free_at[5]; /* XXX */ + stat_cnt_t can_node_be_removed[5]; /* XXX */ + long int lnum[5]; /* XXX */ + long int rnum[5]; /* XXX */ + long int lbytes[5]; /* XXX */ + long int rbytes[5]; /* XXX */ + stat_cnt_t get_neighbors[5]; + stat_cnt_t get_neighbors_restart[5]; + stat_cnt_t need_l_neighbor[5]; + stat_cnt_t need_r_neighbor[5]; + + stat_cnt_t free_block; + struct __scan_bitmap_stats { + stat_cnt_t call; + stat_cnt_t wait; + stat_cnt_t bmap; + stat_cnt_t retry; + stat_cnt_t in_journal_hint; + stat_cnt_t in_journal_nohint; + stat_cnt_t stolen; + } scan_bitmap; + struct __journal_stats { + stat_cnt_t in_journal; + stat_cnt_t in_journal_bitmap; + stat_cnt_t in_journal_reusable; + stat_cnt_t lock_journal; + stat_cnt_t lock_journal_wait; + stat_cnt_t journal_being; + stat_cnt_t journal_relock_writers; + stat_cnt_t journal_relock_wcount; + stat_cnt_t mark_dirty; + stat_cnt_t mark_dirty_already; + stat_cnt_t mark_dirty_notjournal; + stat_cnt_t restore_prepared; + stat_cnt_t prepare; + stat_cnt_t prepare_retry; + } journal; +} reiserfs_proc_info_data_t; +#else +typedef struct reiserfs_proc_info_data { +} reiserfs_proc_info_data_t; +#endif + +/* reiserfs union of in-core super block data */ +struct reiserfs_sb_info { + struct buffer_head *s_sbh; /* Buffer containing the super block */ + /* both the comment and the choice of + name are unclear for s_rs -Hans */ + struct reiserfs_super_block *s_rs; /* Pointer to the super block in the buffer */ + struct reiserfs_bitmap_info *s_ap_bitmap; + struct reiserfs_journal *s_journal; /* pointer to journal information */ + unsigned short s_mount_state; /* reiserfs state (valid, invalid) */ + + /* Serialize writers access, replace the old bkl */ + struct mutex lock; + /* Owner of the lock (can be recursive) */ + struct task_struct *lock_owner; + /* Depth of the lock, start from -1 like the bkl */ + int lock_depth; + + /* Comment? -Hans */ + void (*end_io_handler) (struct buffer_head *, int); + hashf_t s_hash_function; /* pointer to function which is used + to sort names in directory. Set on + mount */ + unsigned long s_mount_opt; /* reiserfs's mount options are set + here (currently - NOTAIL, NOLOG, + REPLAYONLY) */ + + struct { /* This is a structure that describes block allocator options */ + unsigned long bits; /* Bitfield for enable/disable kind of options */ + unsigned long large_file_size; /* size started from which we consider file to be a large one(in blocks) */ + int border; /* percentage of disk, border takes */ + int preallocmin; /* Minimal file size (in blocks) starting from which we do preallocations */ + int preallocsize; /* Number of blocks we try to prealloc when file + reaches preallocmin size (in blocks) or + prealloc_list is empty. */ + } s_alloc_options; + + /* Comment? -Hans */ + wait_queue_head_t s_wait; + /* To be obsoleted soon by per buffer seals.. -Hans */ + atomic_t s_generation_counter; // increased by one every time the + // tree gets re-balanced + unsigned long s_properties; /* File system properties. Currently holds + on-disk FS format */ + + /* session statistics */ + int s_disk_reads; + int s_disk_writes; + int s_fix_nodes; + int s_do_balance; + int s_unneeded_left_neighbor; + int s_good_search_by_key_reada; + int s_bmaps; + int s_bmaps_without_search; + int s_direct2indirect; + int s_indirect2direct; + /* set up when it's ok for reiserfs_read_inode2() to read from + disk inode with nlink==0. Currently this is only used during + finish_unfinished() processing at mount time */ + int s_is_unlinked_ok; + reiserfs_proc_info_data_t s_proc_info_data; + struct proc_dir_entry *procdir; + int reserved_blocks; /* amount of blocks reserved for further allocations */ + spinlock_t bitmap_lock; /* this lock on now only used to protect reserved_blocks variable */ + struct dentry *priv_root; /* root of /.reiserfs_priv */ + struct dentry *xattr_root; /* root of /.reiserfs_priv/xattrs */ + int j_errno; +#ifdef CONFIG_QUOTA + char *s_qf_names[MAXQUOTAS]; + int s_jquota_fmt; +#endif + char *s_jdev; /* Stored jdev for mount option showing */ +#ifdef CONFIG_REISERFS_CHECK + + struct tree_balance *cur_tb; /* + * Detects whether more than one + * copy of tb exists per superblock + * as a means of checking whether + * do_balance is executing concurrently + * against another tree reader/writer + * on a same mount point. + */ +#endif +}; + +/* Definitions of reiserfs on-disk properties: */ +#define REISERFS_3_5 0 +#define REISERFS_3_6 1 +#define REISERFS_OLD_FORMAT 2 + +enum reiserfs_mount_options { +/* Mount options */ + REISERFS_LARGETAIL, /* large tails will be created in a session */ + REISERFS_SMALLTAIL, /* small (for files less than block size) tails will be created in a session */ + REPLAYONLY, /* replay journal and return 0. Use by fsck */ + REISERFS_CONVERT, /* -o conv: causes conversion of old + format super block to the new + format. If not specified - old + partition will be dealt with in a + manner of 3.5.x */ + +/* -o hash={tea, rupasov, r5, detect} is meant for properly mounting +** reiserfs disks from 3.5.19 or earlier. 99% of the time, this option +** is not required. If the normal autodection code can't determine which +** hash to use (because both hashes had the same value for a file) +** use this option to force a specific hash. It won't allow you to override +** the existing hash on the FS, so if you have a tea hash disk, and mount +** with -o hash=rupasov, the mount will fail. +*/ + FORCE_TEA_HASH, /* try to force tea hash on mount */ + FORCE_RUPASOV_HASH, /* try to force rupasov hash on mount */ + FORCE_R5_HASH, /* try to force rupasov hash on mount */ + FORCE_HASH_DETECT, /* try to detect hash function on mount */ + + REISERFS_DATA_LOG, + REISERFS_DATA_ORDERED, + REISERFS_DATA_WRITEBACK, + +/* used for testing experimental features, makes benchmarking new + features with and without more convenient, should never be used by + users in any code shipped to users (ideally) */ + + REISERFS_NO_BORDER, + REISERFS_NO_UNHASHED_RELOCATION, + REISERFS_HASHED_RELOCATION, + REISERFS_ATTRS, + REISERFS_XATTRS_USER, + REISERFS_POSIXACL, + REISERFS_EXPOSE_PRIVROOT, + REISERFS_BARRIER_NONE, + REISERFS_BARRIER_FLUSH, + + /* Actions on error */ + REISERFS_ERROR_PANIC, + REISERFS_ERROR_RO, + REISERFS_ERROR_CONTINUE, + + REISERFS_USRQUOTA, /* User quota option specified */ + REISERFS_GRPQUOTA, /* Group quota option specified */ + + REISERFS_TEST1, + REISERFS_TEST2, + REISERFS_TEST3, + REISERFS_TEST4, + REISERFS_UNSUPPORTED_OPT, +}; + +#define reiserfs_r5_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_R5_HASH)) +#define reiserfs_rupasov_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_RUPASOV_HASH)) +#define reiserfs_tea_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_TEA_HASH)) +#define reiserfs_hash_detect(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_HASH_DETECT)) +#define reiserfs_no_border(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_BORDER)) +#define reiserfs_no_unhashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_UNHASHED_RELOCATION)) +#define reiserfs_hashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_HASHED_RELOCATION)) +#define reiserfs_test4(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_TEST4)) + +#define have_large_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_LARGETAIL)) +#define have_small_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_SMALLTAIL)) +#define replay_only(s) (REISERFS_SB(s)->s_mount_opt & (1 << REPLAYONLY)) +#define reiserfs_attrs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ATTRS)) +#define old_format_only(s) (REISERFS_SB(s)->s_properties & (1 << REISERFS_3_5)) +#define convert_reiserfs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_CONVERT)) +#define reiserfs_data_log(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_LOG)) +#define reiserfs_data_ordered(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_ORDERED)) +#define reiserfs_data_writeback(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_WRITEBACK)) +#define reiserfs_xattrs_user(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS_USER)) +#define reiserfs_posixacl(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_POSIXACL)) +#define reiserfs_expose_privroot(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_EXPOSE_PRIVROOT)) +#define reiserfs_xattrs_optional(s) (reiserfs_xattrs_user(s) || reiserfs_posixacl(s)) +#define reiserfs_barrier_none(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_NONE)) +#define reiserfs_barrier_flush(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_FLUSH)) + +#define reiserfs_error_panic(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_PANIC)) +#define reiserfs_error_ro(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_RO)) + +void reiserfs_file_buffer(struct buffer_head *bh, int list); +extern struct file_system_type reiserfs_fs_type; +int reiserfs_resize(struct super_block *, unsigned long); + +#define CARRY_ON 0 +#define SCHEDULE_OCCURRED 1 + +#define SB_BUFFER_WITH_SB(s) (REISERFS_SB(s)->s_sbh) +#define SB_JOURNAL(s) (REISERFS_SB(s)->s_journal) +#define SB_JOURNAL_1st_RESERVED_BLOCK(s) (SB_JOURNAL(s)->j_1st_reserved_block) +#define SB_JOURNAL_LEN_FREE(s) (SB_JOURNAL(s)->j_journal_len_free) +#define SB_AP_BITMAP(s) (REISERFS_SB(s)->s_ap_bitmap) + +#define SB_DISK_JOURNAL_HEAD(s) (SB_JOURNAL(s)->j_header_bh->) + +/* A safe version of the "bdevname", which returns the "s_id" field of + * a superblock or else "Null superblock" if the super block is NULL. + */ +static inline char *reiserfs_bdevname(struct super_block *s) +{ + return (s == NULL) ? "Null superblock" : s->s_id; +} + +#define reiserfs_is_journal_aborted(journal) (unlikely (__reiserfs_is_journal_aborted (journal))) +static inline int __reiserfs_is_journal_aborted(struct reiserfs_journal + *journal) +{ + return test_bit(J_ABORTED, &journal->j_state); +} + +/* + * Locking primitives. The write lock is a per superblock + * special mutex that has properties close to the Big Kernel Lock + * which was used in the previous locking scheme. + */ +void reiserfs_write_lock(struct super_block *s); +void reiserfs_write_unlock(struct super_block *s); +int reiserfs_write_lock_once(struct super_block *s); +void reiserfs_write_unlock_once(struct super_block *s, int lock_depth); + +#ifdef CONFIG_REISERFS_CHECK +void reiserfs_lock_check_recursive(struct super_block *s); +#else +static inline void reiserfs_lock_check_recursive(struct super_block *s) { } +#endif + +/* + * Several mutexes depend on the write lock. + * However sometimes we want to relax the write lock while we hold + * these mutexes, according to the release/reacquire on schedule() + * properties of the Bkl that were used. + * Reiserfs performances and locking were based on this scheme. + * Now that the write lock is a mutex and not the bkl anymore, doing so + * may result in a deadlock: + * + * A acquire write_lock + * A acquire j_commit_mutex + * A release write_lock and wait for something + * B acquire write_lock + * B can't acquire j_commit_mutex and sleep + * A can't acquire write lock anymore + * deadlock + * + * What we do here is avoiding such deadlock by playing the same game + * than the Bkl: if we can't acquire a mutex that depends on the write lock, + * we release the write lock, wait a bit and then retry. + * + * The mutexes concerned by this hack are: + * - The commit mutex of a journal list + * - The flush mutex + * - The journal lock + * - The inode mutex + */ +static inline void reiserfs_mutex_lock_safe(struct mutex *m, + struct super_block *s) +{ + reiserfs_lock_check_recursive(s); + reiserfs_write_unlock(s); + mutex_lock(m); + reiserfs_write_lock(s); +} + +static inline void +reiserfs_mutex_lock_nested_safe(struct mutex *m, unsigned int subclass, + struct super_block *s) +{ + reiserfs_lock_check_recursive(s); + reiserfs_write_unlock(s); + mutex_lock_nested(m, subclass); + reiserfs_write_lock(s); +} + +static inline void +reiserfs_down_read_safe(struct rw_semaphore *sem, struct super_block *s) +{ + reiserfs_lock_check_recursive(s); + reiserfs_write_unlock(s); + down_read(sem); + reiserfs_write_lock(s); +} + +/* + * When we schedule, we usually want to also release the write lock, + * according to the previous bkl based locking scheme of reiserfs. + */ +static inline void reiserfs_cond_resched(struct super_block *s) +{ + if (need_resched()) { + reiserfs_write_unlock(s); + schedule(); + reiserfs_write_lock(s); + } +} + +struct fid; + +/* in reading the #defines, it may help to understand that they employ + the following abbreviations: + + B = Buffer + I = Item header + H = Height within the tree (should be changed to LEV) + N = Number of the item in the node + STAT = stat data + DEH = Directory Entry Header + EC = Entry Count + E = Entry number + UL = Unsigned Long + BLKH = BLocK Header + UNFM = UNForMatted node + DC = Disk Child + P = Path + + These #defines are named by concatenating these abbreviations, + where first comes the arguments, and last comes the return value, + of the macro. + +*/ + +#define USE_INODE_GENERATION_COUNTER + +#define REISERFS_PREALLOCATE +#define DISPLACE_NEW_PACKING_LOCALITIES +#define PREALLOCATION_SIZE 9 + +/* n must be power of 2 */ +#define _ROUND_UP(x,n) (((x)+(n)-1u) & ~((n)-1u)) + +// to be ok for alpha and others we have to align structures to 8 byte +// boundary. +// FIXME: do not change 4 by anything else: there is code which relies on that +#define ROUND_UP(x) _ROUND_UP(x,8LL) + +/* debug levels. Right now, CONFIG_REISERFS_CHECK means print all debug +** messages. +*/ +#define REISERFS_DEBUG_CODE 5 /* extra messages to help find/debug errors */ + +void __reiserfs_warning(struct super_block *s, const char *id, + const char *func, const char *fmt, ...); +#define reiserfs_warning(s, id, fmt, args...) \ + __reiserfs_warning(s, id, __func__, fmt, ##args) +/* assertions handling */ + +/** always check a condition and panic if it's false. */ +#define __RASSERT(cond, scond, format, args...) \ +do { \ + if (!(cond)) \ + reiserfs_panic(NULL, "assertion failure", "(" #cond ") at " \ + __FILE__ ":%i:%s: " format "\n", \ + in_interrupt() ? -1 : task_pid_nr(current), \ + __LINE__, __func__ , ##args); \ +} while (0) + +#define RASSERT(cond, format, args...) __RASSERT(cond, #cond, format, ##args) + +#if defined( CONFIG_REISERFS_CHECK ) +#define RFALSE(cond, format, args...) __RASSERT(!(cond), "!(" #cond ")", format, ##args) +#else +#define RFALSE( cond, format, args... ) do {;} while( 0 ) +#endif + +#define CONSTF __attribute_const__ +/* + * Disk Data Structures + */ + +/***************************************************************************/ +/* SUPER BLOCK */ +/***************************************************************************/ + +/* + * Structure of super block on disk, a version of which in RAM is often accessed as REISERFS_SB(s)->s_rs + * the version in RAM is part of a larger structure containing fields never written to disk. + */ +#define UNSET_HASH 0 // read_super will guess about, what hash names + // in directories were sorted with +#define TEA_HASH 1 +#define YURA_HASH 2 +#define R5_HASH 3 +#define DEFAULT_HASH R5_HASH + +struct journal_params { + __le32 jp_journal_1st_block; /* where does journal start from on its + * device */ + __le32 jp_journal_dev; /* journal device st_rdev */ + __le32 jp_journal_size; /* size of the journal */ + __le32 jp_journal_trans_max; /* max number of blocks in a transaction. */ + __le32 jp_journal_magic; /* random value made on fs creation (this + * was sb_journal_block_count) */ + __le32 jp_journal_max_batch; /* max number of blocks to batch into a + * trans */ + __le32 jp_journal_max_commit_age; /* in seconds, how old can an async + * commit be */ + __le32 jp_journal_max_trans_age; /* in seconds, how old can a transaction + * be */ +}; + +/* this is the super from 3.5.X, where X >= 10 */ +struct reiserfs_super_block_v1 { + __le32 s_block_count; /* blocks count */ + __le32 s_free_blocks; /* free blocks count */ + __le32 s_root_block; /* root block number */ + struct journal_params s_journal; + __le16 s_blocksize; /* block size */ + __le16 s_oid_maxsize; /* max size of object id array, see + * get_objectid() commentary */ + __le16 s_oid_cursize; /* current size of object id array */ + __le16 s_umount_state; /* this is set to 1 when filesystem was + * umounted, to 2 - when not */ + char s_magic[10]; /* reiserfs magic string indicates that + * file system is reiserfs: + * "ReIsErFs" or "ReIsEr2Fs" or "ReIsEr3Fs" */ + __le16 s_fs_state; /* it is set to used by fsck to mark which + * phase of rebuilding is done */ + __le32 s_hash_function_code; /* indicate, what hash function is being use + * to sort names in a directory*/ + __le16 s_tree_height; /* height of disk tree */ + __le16 s_bmap_nr; /* amount of bitmap blocks needed to address + * each block of file system */ + __le16 s_version; /* this field is only reliable on filesystem + * with non-standard journal */ + __le16 s_reserved_for_journal; /* size in blocks of journal area on main + * device, we need to keep after + * making fs with non-standard journal */ +} __attribute__ ((__packed__)); + +#define SB_SIZE_V1 (sizeof(struct reiserfs_super_block_v1)) + +/* this is the on disk super block */ +struct reiserfs_super_block { + struct reiserfs_super_block_v1 s_v1; + __le32 s_inode_generation; + __le32 s_flags; /* Right now used only by inode-attributes, if enabled */ + unsigned char s_uuid[16]; /* filesystem unique identifier */ + unsigned char s_label[16]; /* filesystem volume label */ + __le16 s_mnt_count; /* Count of mounts since last fsck */ + __le16 s_max_mnt_count; /* Maximum mounts before check */ + __le32 s_lastcheck; /* Timestamp of last fsck */ + __le32 s_check_interval; /* Interval between checks */ + char s_unused[76]; /* zero filled by mkreiserfs and + * reiserfs_convert_objectid_map_v1() + * so any additions must be updated + * there as well. */ +} __attribute__ ((__packed__)); + +#define SB_SIZE (sizeof(struct reiserfs_super_block)) + +#define REISERFS_VERSION_1 0 +#define REISERFS_VERSION_2 2 + +// on-disk super block fields converted to cpu form +#define SB_DISK_SUPER_BLOCK(s) (REISERFS_SB(s)->s_rs) +#define SB_V1_DISK_SUPER_BLOCK(s) (&(SB_DISK_SUPER_BLOCK(s)->s_v1)) +#define SB_BLOCKSIZE(s) \ + le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_blocksize)) +#define SB_BLOCK_COUNT(s) \ + le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_block_count)) +#define SB_FREE_BLOCKS(s) \ + le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_free_blocks)) +#define SB_REISERFS_MAGIC(s) \ + (SB_V1_DISK_SUPER_BLOCK(s)->s_magic) +#define SB_ROOT_BLOCK(s) \ + le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_root_block)) +#define SB_TREE_HEIGHT(s) \ + le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_tree_height)) +#define SB_REISERFS_STATE(s) \ + le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_umount_state)) +#define SB_VERSION(s) le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_version)) +#define SB_BMAP_NR(s) le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_bmap_nr)) + +#define PUT_SB_BLOCK_COUNT(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_block_count = cpu_to_le32(val); } while (0) +#define PUT_SB_FREE_BLOCKS(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_free_blocks = cpu_to_le32(val); } while (0) +#define PUT_SB_ROOT_BLOCK(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_root_block = cpu_to_le32(val); } while (0) +#define PUT_SB_TREE_HEIGHT(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_tree_height = cpu_to_le16(val); } while (0) +#define PUT_SB_REISERFS_STATE(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_umount_state = cpu_to_le16(val); } while (0) +#define PUT_SB_VERSION(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_version = cpu_to_le16(val); } while (0) +#define PUT_SB_BMAP_NR(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_bmap_nr = cpu_to_le16 (val); } while (0) + +#define SB_ONDISK_JP(s) (&SB_V1_DISK_SUPER_BLOCK(s)->s_journal) +#define SB_ONDISK_JOURNAL_SIZE(s) \ + le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_size)) +#define SB_ONDISK_JOURNAL_1st_BLOCK(s) \ + le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_1st_block)) +#define SB_ONDISK_JOURNAL_DEVICE(s) \ + le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_dev)) +#define SB_ONDISK_RESERVED_FOR_JOURNAL(s) \ + le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_reserved_for_journal)) + +#define is_block_in_log_or_reserved_area(s, block) \ + block >= SB_JOURNAL_1st_RESERVED_BLOCK(s) \ + && block < SB_JOURNAL_1st_RESERVED_BLOCK(s) + \ + ((!is_reiserfs_jr(SB_DISK_SUPER_BLOCK(s)) ? \ + SB_ONDISK_JOURNAL_SIZE(s) + 1 : SB_ONDISK_RESERVED_FOR_JOURNAL(s))) + +int is_reiserfs_3_5(struct reiserfs_super_block *rs); +int is_reiserfs_3_6(struct reiserfs_super_block *rs); +int is_reiserfs_jr(struct reiserfs_super_block *rs); + +/* ReiserFS leaves the first 64k unused, so that partition labels have + enough space. If someone wants to write a fancy bootloader that + needs more than 64k, let us know, and this will be increased in size. + This number must be larger than than the largest block size on any + platform, or code will break. -Hans */ +#define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024) +#define REISERFS_FIRST_BLOCK unused_define +#define REISERFS_JOURNAL_OFFSET_IN_BYTES REISERFS_DISK_OFFSET_IN_BYTES + +/* the spot for the super in versions 3.5 - 3.5.10 (inclusive) */ +#define REISERFS_OLD_DISK_OFFSET_IN_BYTES (8 * 1024) + +/* reiserfs internal error code (used by search_by_key and fix_nodes)) */ +#define CARRY_ON 0 +#define REPEAT_SEARCH -1 +#define IO_ERROR -2 +#define NO_DISK_SPACE -3 +#define NO_BALANCING_NEEDED (-4) +#define NO_MORE_UNUSED_CONTIGUOUS_BLOCKS (-5) +#define QUOTA_EXCEEDED -6 + +typedef __u32 b_blocknr_t; +typedef __le32 unp_t; + +struct unfm_nodeinfo { + unp_t unfm_nodenum; + unsigned short unfm_freespace; +}; + +/* there are two formats of keys: 3.5 and 3.6 + */ +#define KEY_FORMAT_3_5 0 +#define KEY_FORMAT_3_6 1 + +/* there are two stat datas */ +#define STAT_DATA_V1 0 +#define STAT_DATA_V2 1 + +static inline struct reiserfs_inode_info *REISERFS_I(const struct inode *inode) +{ + return container_of(inode, struct reiserfs_inode_info, vfs_inode); +} + +static inline struct reiserfs_sb_info *REISERFS_SB(const struct super_block *sb) +{ + return sb->s_fs_info; +} + +/* Don't trust REISERFS_SB(sb)->s_bmap_nr, it's a u16 + * which overflows on large file systems. */ +static inline __u32 reiserfs_bmap_count(struct super_block *sb) +{ + return (SB_BLOCK_COUNT(sb) - 1) / (sb->s_blocksize * 8) + 1; +} + +static inline int bmap_would_wrap(unsigned bmap_nr) +{ + return bmap_nr > ((1LL << 16) - 1); +} + +/** this says about version of key of all items (but stat data) the + object consists of */ +#define get_inode_item_key_version( inode ) \ + ((REISERFS_I(inode)->i_flags & i_item_key_version_mask) ? KEY_FORMAT_3_6 : KEY_FORMAT_3_5) + +#define set_inode_item_key_version( inode, version ) \ + ({ if((version)==KEY_FORMAT_3_6) \ + REISERFS_I(inode)->i_flags |= i_item_key_version_mask; \ + else \ + REISERFS_I(inode)->i_flags &= ~i_item_key_version_mask; }) + +#define get_inode_sd_version(inode) \ + ((REISERFS_I(inode)->i_flags & i_stat_data_version_mask) ? STAT_DATA_V2 : STAT_DATA_V1) + +#define set_inode_sd_version(inode, version) \ + ({ if((version)==STAT_DATA_V2) \ + REISERFS_I(inode)->i_flags |= i_stat_data_version_mask; \ + else \ + REISERFS_I(inode)->i_flags &= ~i_stat_data_version_mask; }) + +/* This is an aggressive tail suppression policy, I am hoping it + improves our benchmarks. The principle behind it is that percentage + space saving is what matters, not absolute space saving. This is + non-intuitive, but it helps to understand it if you consider that the + cost to access 4 blocks is not much more than the cost to access 1 + block, if you have to do a seek and rotate. A tail risks a + non-linear disk access that is significant as a percentage of total + time cost for a 4 block file and saves an amount of space that is + less significant as a percentage of space, or so goes the hypothesis. + -Hans */ +#define STORE_TAIL_IN_UNFM_S1(n_file_size,n_tail_size,n_block_size) \ +(\ + (!(n_tail_size)) || \ + (((n_tail_size) > MAX_DIRECT_ITEM_LEN(n_block_size)) || \ + ( (n_file_size) >= (n_block_size) * 4 ) || \ + ( ( (n_file_size) >= (n_block_size) * 3 ) && \ + ( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size))/4) ) || \ + ( ( (n_file_size) >= (n_block_size) * 2 ) && \ + ( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size))/2) ) || \ + ( ( (n_file_size) >= (n_block_size) ) && \ + ( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size) * 3)/4) ) ) \ +) + +/* Another strategy for tails, this one means only create a tail if all the + file would fit into one DIRECT item. + Primary intention for this one is to increase performance by decreasing + seeking. +*/ +#define STORE_TAIL_IN_UNFM_S2(n_file_size,n_tail_size,n_block_size) \ +(\ + (!(n_tail_size)) || \ + (((n_file_size) > MAX_DIRECT_ITEM_LEN(n_block_size)) ) \ +) + +/* + * values for s_umount_state field + */ +#define REISERFS_VALID_FS 1 +#define REISERFS_ERROR_FS 2 + +// +// there are 5 item types currently +// +#define TYPE_STAT_DATA 0 +#define TYPE_INDIRECT 1 +#define TYPE_DIRECT 2 +#define TYPE_DIRENTRY 3 +#define TYPE_MAXTYPE 3 +#define TYPE_ANY 15 // FIXME: comment is required + +/***************************************************************************/ +/* KEY & ITEM HEAD */ +/***************************************************************************/ + +// +// directories use this key as well as old files +// +struct offset_v1 { + __le32 k_offset; + __le32 k_uniqueness; +} __attribute__ ((__packed__)); + +struct offset_v2 { + __le64 v; +} __attribute__ ((__packed__)); + +static inline __u16 offset_v2_k_type(const struct offset_v2 *v2) +{ + __u8 type = le64_to_cpu(v2->v) >> 60; + return (type <= TYPE_MAXTYPE) ? type : TYPE_ANY; +} + +static inline void set_offset_v2_k_type(struct offset_v2 *v2, int type) +{ + v2->v = + (v2->v & cpu_to_le64(~0ULL >> 4)) | cpu_to_le64((__u64) type << 60); +} + +static inline loff_t offset_v2_k_offset(const struct offset_v2 *v2) +{ + return le64_to_cpu(v2->v) & (~0ULL >> 4); +} + +static inline void set_offset_v2_k_offset(struct offset_v2 *v2, loff_t offset) +{ + offset &= (~0ULL >> 4); + v2->v = (v2->v & cpu_to_le64(15ULL << 60)) | cpu_to_le64(offset); +} + +/* Key of an item determines its location in the S+tree, and + is composed of 4 components */ +struct reiserfs_key { + __le32 k_dir_id; /* packing locality: by default parent + directory object id */ + __le32 k_objectid; /* object identifier */ + union { + struct offset_v1 k_offset_v1; + struct offset_v2 k_offset_v2; + } __attribute__ ((__packed__)) u; +} __attribute__ ((__packed__)); + +struct in_core_key { + __u32 k_dir_id; /* packing locality: by default parent + directory object id */ + __u32 k_objectid; /* object identifier */ + __u64 k_offset; + __u8 k_type; +}; + +struct cpu_key { + struct in_core_key on_disk_key; + int version; + int key_length; /* 3 in all cases but direct2indirect and + indirect2direct conversion */ +}; + +/* Our function for comparing keys can compare keys of different + lengths. It takes as a parameter the length of the keys it is to + compare. These defines are used in determining what is to be passed + to it as that parameter. */ +#define REISERFS_FULL_KEY_LEN 4 +#define REISERFS_SHORT_KEY_LEN 2 + +/* The result of the key compare */ +#define FIRST_GREATER 1 +#define SECOND_GREATER -1 +#define KEYS_IDENTICAL 0 +#define KEY_FOUND 1 +#define KEY_NOT_FOUND 0 + +#define KEY_SIZE (sizeof(struct reiserfs_key)) +#define SHORT_KEY_SIZE (sizeof (__u32) + sizeof (__u32)) + +/* return values for search_by_key and clones */ +#define ITEM_FOUND 1 +#define ITEM_NOT_FOUND 0 +#define ENTRY_FOUND 1 +#define ENTRY_NOT_FOUND 0 +#define DIRECTORY_NOT_FOUND -1 +#define REGULAR_FILE_FOUND -2 +#define DIRECTORY_FOUND -3 +#define BYTE_FOUND 1 +#define BYTE_NOT_FOUND 0 +#define FILE_NOT_FOUND -1 + +#define POSITION_FOUND 1 +#define POSITION_NOT_FOUND 0 + +// return values for reiserfs_find_entry and search_by_entry_key +#define NAME_FOUND 1 +#define NAME_NOT_FOUND 0 +#define GOTO_PREVIOUS_ITEM 2 +#define NAME_FOUND_INVISIBLE 3 + +/* Everything in the filesystem is stored as a set of items. The + item head contains the key of the item, its free space (for + indirect items) and specifies the location of the item itself + within the block. */ + +struct item_head { + /* Everything in the tree is found by searching for it based on + * its key.*/ + struct reiserfs_key ih_key; + union { + /* The free space in the last unformatted node of an + indirect item if this is an indirect item. This + equals 0xFFFF iff this is a direct item or stat data + item. Note that the key, not this field, is used to + determine the item type, and thus which field this + union contains. */ + __le16 ih_free_space_reserved; + /* Iff this is a directory item, this field equals the + number of directory entries in the directory item. */ + __le16 ih_entry_count; + } __attribute__ ((__packed__)) u; + __le16 ih_item_len; /* total size of the item body */ + __le16 ih_item_location; /* an offset to the item body + * within the block */ + __le16 ih_version; /* 0 for all old items, 2 for new + ones. Highest bit is set by fsck + temporary, cleaned after all + done */ +} __attribute__ ((__packed__)); +/* size of item header */ +#define IH_SIZE (sizeof(struct item_head)) + +#define ih_free_space(ih) le16_to_cpu((ih)->u.ih_free_space_reserved) +#define ih_version(ih) le16_to_cpu((ih)->ih_version) +#define ih_entry_count(ih) le16_to_cpu((ih)->u.ih_entry_count) +#define ih_location(ih) le16_to_cpu((ih)->ih_item_location) +#define ih_item_len(ih) le16_to_cpu((ih)->ih_item_len) + +#define put_ih_free_space(ih, val) do { (ih)->u.ih_free_space_reserved = cpu_to_le16(val); } while(0) +#define put_ih_version(ih, val) do { (ih)->ih_version = cpu_to_le16(val); } while (0) +#define put_ih_entry_count(ih, val) do { (ih)->u.ih_entry_count = cpu_to_le16(val); } while (0) +#define put_ih_location(ih, val) do { (ih)->ih_item_location = cpu_to_le16(val); } while (0) +#define put_ih_item_len(ih, val) do { (ih)->ih_item_len = cpu_to_le16(val); } while (0) + +#define unreachable_item(ih) (ih_version(ih) & (1 << 15)) + +#define get_ih_free_space(ih) (ih_version (ih) == KEY_FORMAT_3_6 ? 0 : ih_free_space (ih)) +#define set_ih_free_space(ih,val) put_ih_free_space((ih), ((ih_version(ih) == KEY_FORMAT_3_6) ? 0 : (val))) + +/* these operate on indirect items, where you've got an array of ints +** at a possibly unaligned location. These are a noop on ia32 +** +** p is the array of __u32, i is the index into the array, v is the value +** to store there. +*/ +#define get_block_num(p, i) get_unaligned_le32((p) + (i)) +#define put_block_num(p, i, v) put_unaligned_le32((v), (p) + (i)) + +// +// in old version uniqueness field shows key type +// +#define V1_SD_UNIQUENESS 0 +#define V1_INDIRECT_UNIQUENESS 0xfffffffe +#define V1_DIRECT_UNIQUENESS 0xffffffff +#define V1_DIRENTRY_UNIQUENESS 500 +#define V1_ANY_UNIQUENESS 555 // FIXME: comment is required + +// +// here are conversion routines +// +static inline int uniqueness2type(__u32 uniqueness) CONSTF; +static inline int uniqueness2type(__u32 uniqueness) +{ + switch ((int)uniqueness) { + case V1_SD_UNIQUENESS: + return TYPE_STAT_DATA; + case V1_INDIRECT_UNIQUENESS: + return TYPE_INDIRECT; + case V1_DIRECT_UNIQUENESS: + return TYPE_DIRECT; + case V1_DIRENTRY_UNIQUENESS: + return TYPE_DIRENTRY; + case V1_ANY_UNIQUENESS: + default: + return TYPE_ANY; + } +} + +static inline __u32 type2uniqueness(int type) CONSTF; +static inline __u32 type2uniqueness(int type) +{ + switch (type) { + case TYPE_STAT_DATA: + return V1_SD_UNIQUENESS; + case TYPE_INDIRECT: + return V1_INDIRECT_UNIQUENESS; + case TYPE_DIRECT: + return V1_DIRECT_UNIQUENESS; + case TYPE_DIRENTRY: + return V1_DIRENTRY_UNIQUENESS; + case TYPE_ANY: + default: + return V1_ANY_UNIQUENESS; + } +} + +// +// key is pointer to on disk key which is stored in le, result is cpu, +// there is no way to get version of object from key, so, provide +// version to these defines +// +static inline loff_t le_key_k_offset(int version, + const struct reiserfs_key *key) +{ + return (version == KEY_FORMAT_3_5) ? + le32_to_cpu(key->u.k_offset_v1.k_offset) : + offset_v2_k_offset(&(key->u.k_offset_v2)); +} + +static inline loff_t le_ih_k_offset(const struct item_head *ih) +{ + return le_key_k_offset(ih_version(ih), &(ih->ih_key)); +} + +static inline loff_t le_key_k_type(int version, const struct reiserfs_key *key) +{ + return (version == KEY_FORMAT_3_5) ? + uniqueness2type(le32_to_cpu(key->u.k_offset_v1.k_uniqueness)) : + offset_v2_k_type(&(key->u.k_offset_v2)); +} + +static inline loff_t le_ih_k_type(const struct item_head *ih) +{ + return le_key_k_type(ih_version(ih), &(ih->ih_key)); +} + +static inline void set_le_key_k_offset(int version, struct reiserfs_key *key, + loff_t offset) +{ + (version == KEY_FORMAT_3_5) ? (void)(key->u.k_offset_v1.k_offset = cpu_to_le32(offset)) : /* jdm check */ + (void)(set_offset_v2_k_offset(&(key->u.k_offset_v2), offset)); +} + +static inline void set_le_ih_k_offset(struct item_head *ih, loff_t offset) +{ + set_le_key_k_offset(ih_version(ih), &(ih->ih_key), offset); +} + +static inline void set_le_key_k_type(int version, struct reiserfs_key *key, + int type) +{ + (version == KEY_FORMAT_3_5) ? + (void)(key->u.k_offset_v1.k_uniqueness = + cpu_to_le32(type2uniqueness(type))) + : (void)(set_offset_v2_k_type(&(key->u.k_offset_v2), type)); +} + +static inline void set_le_ih_k_type(struct item_head *ih, int type) +{ + set_le_key_k_type(ih_version(ih), &(ih->ih_key), type); +} + +static inline int is_direntry_le_key(int version, struct reiserfs_key *key) +{ + return le_key_k_type(version, key) == TYPE_DIRENTRY; +} + +static inline int is_direct_le_key(int version, struct reiserfs_key *key) +{ + return le_key_k_type(version, key) == TYPE_DIRECT; +} + +static inline int is_indirect_le_key(int version, struct reiserfs_key *key) +{ + return le_key_k_type(version, key) == TYPE_INDIRECT; +} + +static inline int is_statdata_le_key(int version, struct reiserfs_key *key) +{ + return le_key_k_type(version, key) == TYPE_STAT_DATA; +} + +// +// item header has version. +// +static inline int is_direntry_le_ih(struct item_head *ih) +{ + return is_direntry_le_key(ih_version(ih), &ih->ih_key); +} + +static inline int is_direct_le_ih(struct item_head *ih) +{ + return is_direct_le_key(ih_version(ih), &ih->ih_key); +} + +static inline int is_indirect_le_ih(struct item_head *ih) +{ + return is_indirect_le_key(ih_version(ih), &ih->ih_key); +} + +static inline int is_statdata_le_ih(struct item_head *ih) +{ + return is_statdata_le_key(ih_version(ih), &ih->ih_key); +} + +// +// key is pointer to cpu key, result is cpu +// +static inline loff_t cpu_key_k_offset(const struct cpu_key *key) +{ + return key->on_disk_key.k_offset; +} + +static inline loff_t cpu_key_k_type(const struct cpu_key *key) +{ + return key->on_disk_key.k_type; +} + +static inline void set_cpu_key_k_offset(struct cpu_key *key, loff_t offset) +{ + key->on_disk_key.k_offset = offset; +} + +static inline void set_cpu_key_k_type(struct cpu_key *key, int type) +{ + key->on_disk_key.k_type = type; +} + +static inline void cpu_key_k_offset_dec(struct cpu_key *key) +{ + key->on_disk_key.k_offset--; +} + +#define is_direntry_cpu_key(key) (cpu_key_k_type (key) == TYPE_DIRENTRY) +#define is_direct_cpu_key(key) (cpu_key_k_type (key) == TYPE_DIRECT) +#define is_indirect_cpu_key(key) (cpu_key_k_type (key) == TYPE_INDIRECT) +#define is_statdata_cpu_key(key) (cpu_key_k_type (key) == TYPE_STAT_DATA) + +/* are these used ? */ +#define is_direntry_cpu_ih(ih) (is_direntry_cpu_key (&((ih)->ih_key))) +#define is_direct_cpu_ih(ih) (is_direct_cpu_key (&((ih)->ih_key))) +#define is_indirect_cpu_ih(ih) (is_indirect_cpu_key (&((ih)->ih_key))) +#define is_statdata_cpu_ih(ih) (is_statdata_cpu_key (&((ih)->ih_key))) + +#define I_K_KEY_IN_ITEM(ih, key, n_blocksize) \ + (!COMP_SHORT_KEYS(ih, key) && \ + I_OFF_BYTE_IN_ITEM(ih, k_offset(key), n_blocksize)) + +/* maximal length of item */ +#define MAX_ITEM_LEN(block_size) (block_size - BLKH_SIZE - IH_SIZE) +#define MIN_ITEM_LEN 1 + +/* object identifier for root dir */ +#define REISERFS_ROOT_OBJECTID 2 +#define REISERFS_ROOT_PARENT_OBJECTID 1 + +extern struct reiserfs_key root_key; + +/* + * Picture represents a leaf of the S+tree + * ______________________________________________________ + * | | Array of | | | + * |Block | Object-Item | F r e e | Objects- | + * | head | Headers | S p a c e | Items | + * |______|_______________|___________________|___________| + */ + +/* Header of a disk block. More precisely, header of a formatted leaf + or internal node, and not the header of an unformatted node. */ +struct block_head { + __le16 blk_level; /* Level of a block in the tree. */ + __le16 blk_nr_item; /* Number of keys/items in a block. */ + __le16 blk_free_space; /* Block free space in bytes. */ + __le16 blk_reserved; + /* dump this in v4/planA */ + struct reiserfs_key blk_right_delim_key; /* kept only for compatibility */ +}; + +#define BLKH_SIZE (sizeof(struct block_head)) +#define blkh_level(p_blkh) (le16_to_cpu((p_blkh)->blk_level)) +#define blkh_nr_item(p_blkh) (le16_to_cpu((p_blkh)->blk_nr_item)) +#define blkh_free_space(p_blkh) (le16_to_cpu((p_blkh)->blk_free_space)) +#define blkh_reserved(p_blkh) (le16_to_cpu((p_blkh)->blk_reserved)) +#define set_blkh_level(p_blkh,val) ((p_blkh)->blk_level = cpu_to_le16(val)) +#define set_blkh_nr_item(p_blkh,val) ((p_blkh)->blk_nr_item = cpu_to_le16(val)) +#define set_blkh_free_space(p_blkh,val) ((p_blkh)->blk_free_space = cpu_to_le16(val)) +#define set_blkh_reserved(p_blkh,val) ((p_blkh)->blk_reserved = cpu_to_le16(val)) +#define blkh_right_delim_key(p_blkh) ((p_blkh)->blk_right_delim_key) +#define set_blkh_right_delim_key(p_blkh,val) ((p_blkh)->blk_right_delim_key = val) + +/* + * values for blk_level field of the struct block_head + */ + +#define FREE_LEVEL 0 /* when node gets removed from the tree its + blk_level is set to FREE_LEVEL. It is then + used to see whether the node is still in the + tree */ + +#define DISK_LEAF_NODE_LEVEL 1 /* Leaf node level. */ + +/* Given the buffer head of a formatted node, resolve to the block head of that node. */ +#define B_BLK_HEAD(bh) ((struct block_head *)((bh)->b_data)) +/* Number of items that are in buffer. */ +#define B_NR_ITEMS(bh) (blkh_nr_item(B_BLK_HEAD(bh))) +#define B_LEVEL(bh) (blkh_level(B_BLK_HEAD(bh))) +#define B_FREE_SPACE(bh) (blkh_free_space(B_BLK_HEAD(bh))) + +#define PUT_B_NR_ITEMS(bh, val) do { set_blkh_nr_item(B_BLK_HEAD(bh), val); } while (0) +#define PUT_B_LEVEL(bh, val) do { set_blkh_level(B_BLK_HEAD(bh), val); } while (0) +#define PUT_B_FREE_SPACE(bh, val) do { set_blkh_free_space(B_BLK_HEAD(bh), val); } while (0) + +/* Get right delimiting key. -- little endian */ +#define B_PRIGHT_DELIM_KEY(bh) (&(blk_right_delim_key(B_BLK_HEAD(bh)))) + +/* Does the buffer contain a disk leaf. */ +#define B_IS_ITEMS_LEVEL(bh) (B_LEVEL(bh) == DISK_LEAF_NODE_LEVEL) + +/* Does the buffer contain a disk internal node */ +#define B_IS_KEYS_LEVEL(bh) (B_LEVEL(bh) > DISK_LEAF_NODE_LEVEL \ + && B_LEVEL(bh) <= MAX_HEIGHT) + +/***************************************************************************/ +/* STAT DATA */ +/***************************************************************************/ + +// +// old stat data is 32 bytes long. We are going to distinguish new one by +// different size +// +struct stat_data_v1 { + __le16 sd_mode; /* file type, permissions */ + __le16 sd_nlink; /* number of hard links */ + __le16 sd_uid; /* owner */ + __le16 sd_gid; /* group */ + __le32 sd_size; /* file size */ + __le32 sd_atime; /* time of last access */ + __le32 sd_mtime; /* time file was last modified */ + __le32 sd_ctime; /* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */ + union { + __le32 sd_rdev; + __le32 sd_blocks; /* number of blocks file uses */ + } __attribute__ ((__packed__)) u; + __le32 sd_first_direct_byte; /* first byte of file which is stored + in a direct item: except that if it + equals 1 it is a symlink and if it + equals ~(__u32)0 there is no + direct item. The existence of this + field really grates on me. Let's + replace it with a macro based on + sd_size and our tail suppression + policy. Someday. -Hans */ +} __attribute__ ((__packed__)); + +#define SD_V1_SIZE (sizeof(struct stat_data_v1)) +#define stat_data_v1(ih) (ih_version (ih) == KEY_FORMAT_3_5) +#define sd_v1_mode(sdp) (le16_to_cpu((sdp)->sd_mode)) +#define set_sd_v1_mode(sdp,v) ((sdp)->sd_mode = cpu_to_le16(v)) +#define sd_v1_nlink(sdp) (le16_to_cpu((sdp)->sd_nlink)) +#define set_sd_v1_nlink(sdp,v) ((sdp)->sd_nlink = cpu_to_le16(v)) +#define sd_v1_uid(sdp) (le16_to_cpu((sdp)->sd_uid)) +#define set_sd_v1_uid(sdp,v) ((sdp)->sd_uid = cpu_to_le16(v)) +#define sd_v1_gid(sdp) (le16_to_cpu((sdp)->sd_gid)) +#define set_sd_v1_gid(sdp,v) ((sdp)->sd_gid = cpu_to_le16(v)) +#define sd_v1_size(sdp) (le32_to_cpu((sdp)->sd_size)) +#define set_sd_v1_size(sdp,v) ((sdp)->sd_size = cpu_to_le32(v)) +#define sd_v1_atime(sdp) (le32_to_cpu((sdp)->sd_atime)) +#define set_sd_v1_atime(sdp,v) ((sdp)->sd_atime = cpu_to_le32(v)) +#define sd_v1_mtime(sdp) (le32_to_cpu((sdp)->sd_mtime)) +#define set_sd_v1_mtime(sdp,v) ((sdp)->sd_mtime = cpu_to_le32(v)) +#define sd_v1_ctime(sdp) (le32_to_cpu((sdp)->sd_ctime)) +#define set_sd_v1_ctime(sdp,v) ((sdp)->sd_ctime = cpu_to_le32(v)) +#define sd_v1_rdev(sdp) (le32_to_cpu((sdp)->u.sd_rdev)) +#define set_sd_v1_rdev(sdp,v) ((sdp)->u.sd_rdev = cpu_to_le32(v)) +#define sd_v1_blocks(sdp) (le32_to_cpu((sdp)->u.sd_blocks)) +#define set_sd_v1_blocks(sdp,v) ((sdp)->u.sd_blocks = cpu_to_le32(v)) +#define sd_v1_first_direct_byte(sdp) \ + (le32_to_cpu((sdp)->sd_first_direct_byte)) +#define set_sd_v1_first_direct_byte(sdp,v) \ + ((sdp)->sd_first_direct_byte = cpu_to_le32(v)) + +/* inode flags stored in sd_attrs (nee sd_reserved) */ + +/* we want common flags to have the same values as in ext2, + so chattr(1) will work without problems */ +#define REISERFS_IMMUTABLE_FL FS_IMMUTABLE_FL +#define REISERFS_APPEND_FL FS_APPEND_FL +#define REISERFS_SYNC_FL FS_SYNC_FL +#define REISERFS_NOATIME_FL FS_NOATIME_FL +#define REISERFS_NODUMP_FL FS_NODUMP_FL +#define REISERFS_SECRM_FL FS_SECRM_FL +#define REISERFS_UNRM_FL FS_UNRM_FL +#define REISERFS_COMPR_FL FS_COMPR_FL +#define REISERFS_NOTAIL_FL FS_NOTAIL_FL + +/* persistent flags that file inherits from the parent directory */ +#define REISERFS_INHERIT_MASK ( REISERFS_IMMUTABLE_FL | \ + REISERFS_SYNC_FL | \ + REISERFS_NOATIME_FL | \ + REISERFS_NODUMP_FL | \ + REISERFS_SECRM_FL | \ + REISERFS_COMPR_FL | \ + REISERFS_NOTAIL_FL ) + +/* Stat Data on disk (reiserfs version of UFS disk inode minus the + address blocks) */ +struct stat_data { + __le16 sd_mode; /* file type, permissions */ + __le16 sd_attrs; /* persistent inode flags */ + __le32 sd_nlink; /* number of hard links */ + __le64 sd_size; /* file size */ + __le32 sd_uid; /* owner */ + __le32 sd_gid; /* group */ + __le32 sd_atime; /* time of last access */ + __le32 sd_mtime; /* time file was last modified */ + __le32 sd_ctime; /* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */ + __le32 sd_blocks; + union { + __le32 sd_rdev; + __le32 sd_generation; + //__le32 sd_first_direct_byte; + /* first byte of file which is stored in a + direct item: except that if it equals 1 + it is a symlink and if it equals + ~(__u32)0 there is no direct item. The + existence of this field really grates + on me. Let's replace it with a macro + based on sd_size and our tail + suppression policy? */ + } __attribute__ ((__packed__)) u; +} __attribute__ ((__packed__)); +// +// this is 44 bytes long +// +#define SD_SIZE (sizeof(struct stat_data)) +#define SD_V2_SIZE SD_SIZE +#define stat_data_v2(ih) (ih_version (ih) == KEY_FORMAT_3_6) +#define sd_v2_mode(sdp) (le16_to_cpu((sdp)->sd_mode)) +#define set_sd_v2_mode(sdp,v) ((sdp)->sd_mode = cpu_to_le16(v)) +/* sd_reserved */ +/* set_sd_reserved */ +#define sd_v2_nlink(sdp) (le32_to_cpu((sdp)->sd_nlink)) +#define set_sd_v2_nlink(sdp,v) ((sdp)->sd_nlink = cpu_to_le32(v)) +#define sd_v2_size(sdp) (le64_to_cpu((sdp)->sd_size)) +#define set_sd_v2_size(sdp,v) ((sdp)->sd_size = cpu_to_le64(v)) +#define sd_v2_uid(sdp) (le32_to_cpu((sdp)->sd_uid)) +#define set_sd_v2_uid(sdp,v) ((sdp)->sd_uid = cpu_to_le32(v)) +#define sd_v2_gid(sdp) (le32_to_cpu((sdp)->sd_gid)) +#define set_sd_v2_gid(sdp,v) ((sdp)->sd_gid = cpu_to_le32(v)) +#define sd_v2_atime(sdp) (le32_to_cpu((sdp)->sd_atime)) +#define set_sd_v2_atime(sdp,v) ((sdp)->sd_atime = cpu_to_le32(v)) +#define sd_v2_mtime(sdp) (le32_to_cpu((sdp)->sd_mtime)) +#define set_sd_v2_mtime(sdp,v) ((sdp)->sd_mtime = cpu_to_le32(v)) +#define sd_v2_ctime(sdp) (le32_to_cpu((sdp)->sd_ctime)) +#define set_sd_v2_ctime(sdp,v) ((sdp)->sd_ctime = cpu_to_le32(v)) +#define sd_v2_blocks(sdp) (le32_to_cpu((sdp)->sd_blocks)) +#define set_sd_v2_blocks(sdp,v) ((sdp)->sd_blocks = cpu_to_le32(v)) +#define sd_v2_rdev(sdp) (le32_to_cpu((sdp)->u.sd_rdev)) +#define set_sd_v2_rdev(sdp,v) ((sdp)->u.sd_rdev = cpu_to_le32(v)) +#define sd_v2_generation(sdp) (le32_to_cpu((sdp)->u.sd_generation)) +#define set_sd_v2_generation(sdp,v) ((sdp)->u.sd_generation = cpu_to_le32(v)) +#define sd_v2_attrs(sdp) (le16_to_cpu((sdp)->sd_attrs)) +#define set_sd_v2_attrs(sdp,v) ((sdp)->sd_attrs = cpu_to_le16(v)) + +/***************************************************************************/ +/* DIRECTORY STRUCTURE */ +/***************************************************************************/ +/* + Picture represents the structure of directory items + ________________________________________________ + | Array of | | | | | | + | directory |N-1| N-2 | .... | 1st |0th| + | entry headers | | | | | | + |_______________|___|_____|________|_______|___| + <---- directory entries ------> + + First directory item has k_offset component 1. We store "." and ".." + in one item, always, we never split "." and ".." into differing + items. This makes, among other things, the code for removing + directories simpler. */ +#define SD_OFFSET 0 +#define SD_UNIQUENESS 0 +#define DOT_OFFSET 1 +#define DOT_DOT_OFFSET 2 +#define DIRENTRY_UNIQUENESS 500 + +/* */ +#define FIRST_ITEM_OFFSET 1 + +/* + Q: How to get key of object pointed to by entry from entry? + + A: Each directory entry has its header. This header has deh_dir_id and deh_objectid fields, those are key + of object, entry points to */ + +/* NOT IMPLEMENTED: + Directory will someday contain stat data of object */ + +struct reiserfs_de_head { + __le32 deh_offset; /* third component of the directory entry key */ + __le32 deh_dir_id; /* objectid of the parent directory of the object, that is referenced + by directory entry */ + __le32 deh_objectid; /* objectid of the object, that is referenced by directory entry */ + __le16 deh_location; /* offset of name in the whole item */ + __le16 deh_state; /* whether 1) entry contains stat data (for future), and 2) whether + entry is hidden (unlinked) */ +} __attribute__ ((__packed__)); +#define DEH_SIZE sizeof(struct reiserfs_de_head) +#define deh_offset(p_deh) (le32_to_cpu((p_deh)->deh_offset)) +#define deh_dir_id(p_deh) (le32_to_cpu((p_deh)->deh_dir_id)) +#define deh_objectid(p_deh) (le32_to_cpu((p_deh)->deh_objectid)) +#define deh_location(p_deh) (le16_to_cpu((p_deh)->deh_location)) +#define deh_state(p_deh) (le16_to_cpu((p_deh)->deh_state)) + +#define put_deh_offset(p_deh,v) ((p_deh)->deh_offset = cpu_to_le32((v))) +#define put_deh_dir_id(p_deh,v) ((p_deh)->deh_dir_id = cpu_to_le32((v))) +#define put_deh_objectid(p_deh,v) ((p_deh)->deh_objectid = cpu_to_le32((v))) +#define put_deh_location(p_deh,v) ((p_deh)->deh_location = cpu_to_le16((v))) +#define put_deh_state(p_deh,v) ((p_deh)->deh_state = cpu_to_le16((v))) + +/* empty directory contains two entries "." and ".." and their headers */ +#define EMPTY_DIR_SIZE \ +(DEH_SIZE * 2 + ROUND_UP (strlen (".")) + ROUND_UP (strlen (".."))) + +/* old format directories have this size when empty */ +#define EMPTY_DIR_SIZE_V1 (DEH_SIZE * 2 + 3) + +#define DEH_Statdata 0 /* not used now */ +#define DEH_Visible 2 + +/* 64 bit systems (and the S/390) need to be aligned explicitly -jdm */ +#if BITS_PER_LONG == 64 || defined(__s390__) || defined(__hppa__) +# define ADDR_UNALIGNED_BITS (3) +#endif + +/* These are only used to manipulate deh_state. + * Because of this, we'll use the ext2_ bit routines, + * since they are little endian */ +#ifdef ADDR_UNALIGNED_BITS + +# define aligned_address(addr) ((void *)((long)(addr) & ~((1UL << ADDR_UNALIGNED_BITS) - 1))) +# define unaligned_offset(addr) (((int)((long)(addr) & ((1 << ADDR_UNALIGNED_BITS) - 1))) << 3) + +# define set_bit_unaligned(nr, addr) \ + __test_and_set_bit_le((nr) + unaligned_offset(addr), aligned_address(addr)) +# define clear_bit_unaligned(nr, addr) \ + __test_and_clear_bit_le((nr) + unaligned_offset(addr), aligned_address(addr)) +# define test_bit_unaligned(nr, addr) \ + test_bit_le((nr) + unaligned_offset(addr), aligned_address(addr)) + +#else + +# define set_bit_unaligned(nr, addr) __test_and_set_bit_le(nr, addr) +# define clear_bit_unaligned(nr, addr) __test_and_clear_bit_le(nr, addr) +# define test_bit_unaligned(nr, addr) test_bit_le(nr, addr) + +#endif + +#define mark_de_with_sd(deh) set_bit_unaligned (DEH_Statdata, &((deh)->deh_state)) +#define mark_de_without_sd(deh) clear_bit_unaligned (DEH_Statdata, &((deh)->deh_state)) +#define mark_de_visible(deh) set_bit_unaligned (DEH_Visible, &((deh)->deh_state)) +#define mark_de_hidden(deh) clear_bit_unaligned (DEH_Visible, &((deh)->deh_state)) + +#define de_with_sd(deh) test_bit_unaligned (DEH_Statdata, &((deh)->deh_state)) +#define de_visible(deh) test_bit_unaligned (DEH_Visible, &((deh)->deh_state)) +#define de_hidden(deh) !test_bit_unaligned (DEH_Visible, &((deh)->deh_state)) + +extern void make_empty_dir_item_v1(char *body, __le32 dirid, __le32 objid, + __le32 par_dirid, __le32 par_objid); +extern void make_empty_dir_item(char *body, __le32 dirid, __le32 objid, + __le32 par_dirid, __le32 par_objid); + +/* array of the entry headers */ + /* get item body */ +#define B_I_PITEM(bh,ih) ( (bh)->b_data + ih_location(ih) ) +#define B_I_DEH(bh,ih) ((struct reiserfs_de_head *)(B_I_PITEM(bh,ih))) + +/* length of the directory entry in directory item. This define + calculates length of i-th directory entry using directory entry + locations from dir entry head. When it calculates length of 0-th + directory entry, it uses length of whole item in place of entry + location of the non-existent following entry in the calculation. + See picture above.*/ +/* +#define I_DEH_N_ENTRY_LENGTH(ih,deh,i) \ +((i) ? (deh_location((deh)-1) - deh_location((deh))) : (ih_item_len((ih)) - deh_location((deh)))) +*/ +static inline int entry_length(const struct buffer_head *bh, + const struct item_head *ih, int pos_in_item) +{ + struct reiserfs_de_head *deh; + + deh = B_I_DEH(bh, ih) + pos_in_item; + if (pos_in_item) + return deh_location(deh - 1) - deh_location(deh); + + return ih_item_len(ih) - deh_location(deh); +} + +/* number of entries in the directory item, depends on ENTRY_COUNT being at the start of directory dynamic data. */ +#define I_ENTRY_COUNT(ih) (ih_entry_count((ih))) + +/* name by bh, ih and entry_num */ +#define B_I_E_NAME(bh,ih,entry_num) ((char *)(bh->b_data + ih_location(ih) + deh_location(B_I_DEH(bh,ih)+(entry_num)))) + +// two entries per block (at least) +#define REISERFS_MAX_NAME(block_size) 255 + +/* this structure is used for operations on directory entries. It is + not a disk structure. */ +/* When reiserfs_find_entry or search_by_entry_key find directory + entry, they return filled reiserfs_dir_entry structure */ +struct reiserfs_dir_entry { + struct buffer_head *de_bh; + int de_item_num; + struct item_head *de_ih; + int de_entry_num; + struct reiserfs_de_head *de_deh; + int de_entrylen; + int de_namelen; + char *de_name; + unsigned long *de_gen_number_bit_string; + + __u32 de_dir_id; + __u32 de_objectid; + + struct cpu_key de_entry_key; +}; + +/* these defines are useful when a particular member of a reiserfs_dir_entry is needed */ + +/* pointer to file name, stored in entry */ +#define B_I_DEH_ENTRY_FILE_NAME(bh,ih,deh) (B_I_PITEM (bh, ih) + deh_location(deh)) + +/* length of name */ +#define I_DEH_N_ENTRY_FILE_NAME_LENGTH(ih,deh,entry_num) \ +(I_DEH_N_ENTRY_LENGTH (ih, deh, entry_num) - (de_with_sd (deh) ? SD_SIZE : 0)) + +/* hash value occupies bits from 7 up to 30 */ +#define GET_HASH_VALUE(offset) ((offset) & 0x7fffff80LL) +/* generation number occupies 7 bits starting from 0 up to 6 */ +#define GET_GENERATION_NUMBER(offset) ((offset) & 0x7fLL) +#define MAX_GENERATION_NUMBER 127 + +#define SET_GENERATION_NUMBER(offset,gen_number) (GET_HASH_VALUE(offset)|(gen_number)) + +/* + * Picture represents an internal node of the reiserfs tree + * ______________________________________________________ + * | | Array of | Array of | Free | + * |block | keys | pointers | space | + * | head | N | N+1 | | + * |______|_______________|___________________|___________| + */ + +/***************************************************************************/ +/* DISK CHILD */ +/***************************************************************************/ +/* Disk child pointer: The pointer from an internal node of the tree + to a node that is on disk. */ +struct disk_child { + __le32 dc_block_number; /* Disk child's block number. */ + __le16 dc_size; /* Disk child's used space. */ + __le16 dc_reserved; +}; + +#define DC_SIZE (sizeof(struct disk_child)) +#define dc_block_number(dc_p) (le32_to_cpu((dc_p)->dc_block_number)) +#define dc_size(dc_p) (le16_to_cpu((dc_p)->dc_size)) +#define put_dc_block_number(dc_p, val) do { (dc_p)->dc_block_number = cpu_to_le32(val); } while(0) +#define put_dc_size(dc_p, val) do { (dc_p)->dc_size = cpu_to_le16(val); } while(0) + +/* Get disk child by buffer header and position in the tree node. */ +#define B_N_CHILD(bh, n_pos) ((struct disk_child *)\ +((bh)->b_data + BLKH_SIZE + B_NR_ITEMS(bh) * KEY_SIZE + DC_SIZE * (n_pos))) + +/* Get disk child number by buffer header and position in the tree node. */ +#define B_N_CHILD_NUM(bh, n_pos) (dc_block_number(B_N_CHILD(bh, n_pos))) +#define PUT_B_N_CHILD_NUM(bh, n_pos, val) \ + (put_dc_block_number(B_N_CHILD(bh, n_pos), val)) + + /* maximal value of field child_size in structure disk_child */ + /* child size is the combined size of all items and their headers */ +#define MAX_CHILD_SIZE(bh) ((int)( (bh)->b_size - BLKH_SIZE )) + +/* amount of used space in buffer (not including block head) */ +#define B_CHILD_SIZE(cur) (MAX_CHILD_SIZE(cur)-(B_FREE_SPACE(cur))) + +/* max and min number of keys in internal node */ +#define MAX_NR_KEY(bh) ( (MAX_CHILD_SIZE(bh)-DC_SIZE)/(KEY_SIZE+DC_SIZE) ) +#define MIN_NR_KEY(bh) (MAX_NR_KEY(bh)/2) + +/***************************************************************************/ +/* PATH STRUCTURES AND DEFINES */ +/***************************************************************************/ + +/* Search_by_key fills up the path from the root to the leaf as it descends the tree looking for the + key. It uses reiserfs_bread to try to find buffers in the cache given their block number. If it + does not find them in the cache it reads them from disk. For each node search_by_key finds using + reiserfs_bread it then uses bin_search to look through that node. bin_search will find the + position of the block_number of the next node if it is looking through an internal node. If it + is looking through a leaf node bin_search will find the position of the item which has key either + equal to given key, or which is the maximal key less than the given key. */ + +struct path_element { + struct buffer_head *pe_buffer; /* Pointer to the buffer at the path in the tree. */ + int pe_position; /* Position in the tree node which is placed in the */ + /* buffer above. */ +}; + +#define MAX_HEIGHT 5 /* maximal height of a tree. don't change this without changing JOURNAL_PER_BALANCE_CNT */ +#define EXTENDED_MAX_HEIGHT 7 /* Must be equals MAX_HEIGHT + FIRST_PATH_ELEMENT_OFFSET */ +#define FIRST_PATH_ELEMENT_OFFSET 2 /* Must be equal to at least 2. */ + +#define ILLEGAL_PATH_ELEMENT_OFFSET 1 /* Must be equal to FIRST_PATH_ELEMENT_OFFSET - 1 */ +#define MAX_FEB_SIZE 6 /* this MUST be MAX_HEIGHT + 1. See about FEB below */ + +/* We need to keep track of who the ancestors of nodes are. When we + perform a search we record which nodes were visited while + descending the tree looking for the node we searched for. This list + of nodes is called the path. This information is used while + performing balancing. Note that this path information may become + invalid, and this means we must check it when using it to see if it + is still valid. You'll need to read search_by_key and the comments + in it, especially about decrement_counters_in_path(), to understand + this structure. + +Paths make the code so much harder to work with and debug.... An +enormous number of bugs are due to them, and trying to write or modify +code that uses them just makes my head hurt. They are based on an +excessive effort to avoid disturbing the precious VFS code.:-( The +gods only know how we are going to SMP the code that uses them. +znodes are the way! */ + +#define PATH_READA 0x1 /* do read ahead */ +#define PATH_READA_BACK 0x2 /* read backwards */ + +struct treepath { + int path_length; /* Length of the array above. */ + int reada; + struct path_element path_elements[EXTENDED_MAX_HEIGHT]; /* Array of the path elements. */ + int pos_in_item; +}; + +#define pos_in_item(path) ((path)->pos_in_item) + +#define INITIALIZE_PATH(var) \ +struct treepath var = {.path_length = ILLEGAL_PATH_ELEMENT_OFFSET, .reada = 0,} + +/* Get path element by path and path position. */ +#define PATH_OFFSET_PELEMENT(path, n_offset) ((path)->path_elements + (n_offset)) + +/* Get buffer header at the path by path and path position. */ +#define PATH_OFFSET_PBUFFER(path, n_offset) (PATH_OFFSET_PELEMENT(path, n_offset)->pe_buffer) + +/* Get position in the element at the path by path and path position. */ +#define PATH_OFFSET_POSITION(path, n_offset) (PATH_OFFSET_PELEMENT(path, n_offset)->pe_position) + +#define PATH_PLAST_BUFFER(path) (PATH_OFFSET_PBUFFER((path), (path)->path_length)) + /* you know, to the person who didn't + write this the macro name does not + at first suggest what it does. + Maybe POSITION_FROM_PATH_END? Or + maybe we should just focus on + dumping paths... -Hans */ +#define PATH_LAST_POSITION(path) (PATH_OFFSET_POSITION((path), (path)->path_length)) + +#define PATH_PITEM_HEAD(path) B_N_PITEM_HEAD(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION(path)) + +/* in do_balance leaf has h == 0 in contrast with path structure, + where root has level == 0. That is why we need these defines */ +#define PATH_H_PBUFFER(path, h) PATH_OFFSET_PBUFFER (path, path->path_length - (h)) /* tb->S[h] */ +#define PATH_H_PPARENT(path, h) PATH_H_PBUFFER (path, (h) + 1) /* tb->F[h] or tb->S[0]->b_parent */ +#define PATH_H_POSITION(path, h) PATH_OFFSET_POSITION (path, path->path_length - (h)) +#define PATH_H_B_ITEM_ORDER(path, h) PATH_H_POSITION(path, h + 1) /* tb->S[h]->b_item_order */ + +#define PATH_H_PATH_OFFSET(path, n_h) ((path)->path_length - (n_h)) + +#define get_last_bh(path) PATH_PLAST_BUFFER(path) +#define get_ih(path) PATH_PITEM_HEAD(path) +#define get_item_pos(path) PATH_LAST_POSITION(path) +#define get_item(path) ((void *)B_N_PITEM(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION (path))) +#define item_moved(ih,path) comp_items(ih, path) +#define path_changed(ih,path) comp_items (ih, path) + +/***************************************************************************/ +/* MISC */ +/***************************************************************************/ + +/* Size of pointer to the unformatted node. */ +#define UNFM_P_SIZE (sizeof(unp_t)) +#define UNFM_P_SHIFT 2 + +// in in-core inode key is stored on le form +#define INODE_PKEY(inode) ((struct reiserfs_key *)(REISERFS_I(inode)->i_key)) + +#define MAX_UL_INT 0xffffffff +#define MAX_INT 0x7ffffff +#define MAX_US_INT 0xffff + +// reiserfs version 2 has max offset 60 bits. Version 1 - 32 bit offset +#define U32_MAX (~(__u32)0) + +static inline loff_t max_reiserfs_offset(struct inode *inode) +{ + if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5) + return (loff_t) U32_MAX; + + return (loff_t) ((~(__u64) 0) >> 4); +} + +/*#define MAX_KEY_UNIQUENESS MAX_UL_INT*/ +#define MAX_KEY_OBJECTID MAX_UL_INT + +#define MAX_B_NUM MAX_UL_INT +#define MAX_FC_NUM MAX_US_INT + +/* the purpose is to detect overflow of an unsigned short */ +#define REISERFS_LINK_MAX (MAX_US_INT - 1000) + +/* The following defines are used in reiserfs_insert_item and reiserfs_append_item */ +#define REISERFS_KERNEL_MEM 0 /* reiserfs kernel memory mode */ +#define REISERFS_USER_MEM 1 /* reiserfs user memory mode */ + +#define fs_generation(s) (REISERFS_SB(s)->s_generation_counter) +#define get_generation(s) atomic_read (&fs_generation(s)) +#define FILESYSTEM_CHANGED_TB(tb) (get_generation((tb)->tb_sb) != (tb)->fs_gen) +#define __fs_changed(gen,s) (gen != get_generation (s)) +#define fs_changed(gen,s) \ +({ \ + reiserfs_cond_resched(s); \ + __fs_changed(gen, s); \ +}) + +/***************************************************************************/ +/* FIXATE NODES */ +/***************************************************************************/ + +#define VI_TYPE_LEFT_MERGEABLE 1 +#define VI_TYPE_RIGHT_MERGEABLE 2 + +/* To make any changes in the tree we always first find node, that + contains item to be changed/deleted or place to insert a new + item. We call this node S. To do balancing we need to decide what + we will shift to left/right neighbor, or to a new node, where new + item will be etc. To make this analysis simpler we build virtual + node. Virtual node is an array of items, that will replace items of + node S. (For instance if we are going to delete an item, virtual + node does not contain it). Virtual node keeps information about + item sizes and types, mergeability of first and last items, sizes + of all entries in directory item. We use this array of items when + calculating what we can shift to neighbors and how many nodes we + have to have if we do not any shiftings, if we shift to left/right + neighbor or to both. */ +struct virtual_item { + int vi_index; // index in the array of item operations + unsigned short vi_type; // left/right mergeability + unsigned short vi_item_len; /* length of item that it will have after balancing */ + struct item_head *vi_ih; + const char *vi_item; // body of item (old or new) + const void *vi_new_data; // 0 always but paste mode + void *vi_uarea; // item specific area +}; + +struct virtual_node { + char *vn_free_ptr; /* this is a pointer to the free space in the buffer */ + unsigned short vn_nr_item; /* number of items in virtual node */ + short vn_size; /* size of node , that node would have if it has unlimited size and no balancing is performed */ + short vn_mode; /* mode of balancing (paste, insert, delete, cut) */ + short vn_affected_item_num; + short vn_pos_in_item; + struct item_head *vn_ins_ih; /* item header of inserted item, 0 for other modes */ + const void *vn_data; + struct virtual_item *vn_vi; /* array of items (including a new one, excluding item to be deleted) */ +}; + +/* used by directory items when creating virtual nodes */ +struct direntry_uarea { + int flags; + __u16 entry_count; + __u16 entry_sizes[1]; +} __attribute__ ((__packed__)); + +/***************************************************************************/ +/* TREE BALANCE */ +/***************************************************************************/ + +/* This temporary structure is used in tree balance algorithms, and + constructed as we go to the extent that its various parts are + needed. It contains arrays of nodes that can potentially be + involved in the balancing of node S, and parameters that define how + each of the nodes must be balanced. Note that in these algorithms + for balancing the worst case is to need to balance the current node + S and the left and right neighbors and all of their parents plus + create a new node. We implement S1 balancing for the leaf nodes + and S0 balancing for the internal nodes (S1 and S0 are defined in + our papers.)*/ + +#define MAX_FREE_BLOCK 7 /* size of the array of buffers to free at end of do_balance */ + +/* maximum number of FEB blocknrs on a single level */ +#define MAX_AMOUNT_NEEDED 2 + +/* someday somebody will prefix every field in this struct with tb_ */ +struct tree_balance { + int tb_mode; + int need_balance_dirty; + struct super_block *tb_sb; + struct reiserfs_transaction_handle *transaction_handle; + struct treepath *tb_path; + struct buffer_head *L[MAX_HEIGHT]; /* array of left neighbors of nodes in the path */ + struct buffer_head *R[MAX_HEIGHT]; /* array of right neighbors of nodes in the path */ + struct buffer_head *FL[MAX_HEIGHT]; /* array of fathers of the left neighbors */ + struct buffer_head *FR[MAX_HEIGHT]; /* array of fathers of the right neighbors */ + struct buffer_head *CFL[MAX_HEIGHT]; /* array of common parents of center node and its left neighbor */ + struct buffer_head *CFR[MAX_HEIGHT]; /* array of common parents of center node and its right neighbor */ + + struct buffer_head *FEB[MAX_FEB_SIZE]; /* array of empty buffers. Number of buffers in array equals + cur_blknum. */ + struct buffer_head *used[MAX_FEB_SIZE]; + struct buffer_head *thrown[MAX_FEB_SIZE]; + int lnum[MAX_HEIGHT]; /* array of number of items which must be + shifted to the left in order to balance the + current node; for leaves includes item that + will be partially shifted; for internal + nodes, it is the number of child pointers + rather than items. It includes the new item + being created. The code sometimes subtracts + one to get the number of wholly shifted + items for other purposes. */ + int rnum[MAX_HEIGHT]; /* substitute right for left in comment above */ + int lkey[MAX_HEIGHT]; /* array indexed by height h mapping the key delimiting L[h] and + S[h] to its item number within the node CFL[h] */ + int rkey[MAX_HEIGHT]; /* substitute r for l in comment above */ + int insert_size[MAX_HEIGHT]; /* the number of bytes by we are trying to add or remove from + S[h]. A negative value means removing. */ + int blknum[MAX_HEIGHT]; /* number of nodes that will replace node S[h] after + balancing on the level h of the tree. If 0 then S is + being deleted, if 1 then S is remaining and no new nodes + are being created, if 2 or 3 then 1 or 2 new nodes is + being created */ + + /* fields that are used only for balancing leaves of the tree */ + int cur_blknum; /* number of empty blocks having been already allocated */ + int s0num; /* number of items that fall into left most node when S[0] splits */ + int s1num; /* number of items that fall into first new node when S[0] splits */ + int s2num; /* number of items that fall into second new node when S[0] splits */ + int lbytes; /* number of bytes which can flow to the left neighbor from the left */ + /* most liquid item that cannot be shifted from S[0] entirely */ + /* if -1 then nothing will be partially shifted */ + int rbytes; /* number of bytes which will flow to the right neighbor from the right */ + /* most liquid item that cannot be shifted from S[0] entirely */ + /* if -1 then nothing will be partially shifted */ + int s1bytes; /* number of bytes which flow to the first new node when S[0] splits */ + /* note: if S[0] splits into 3 nodes, then items do not need to be cut */ + int s2bytes; + struct buffer_head *buf_to_free[MAX_FREE_BLOCK]; /* buffers which are to be freed after do_balance finishes by unfix_nodes */ + char *vn_buf; /* kmalloced memory. Used to create + virtual node and keep map of + dirtied bitmap blocks */ + int vn_buf_size; /* size of the vn_buf */ + struct virtual_node *tb_vn; /* VN starts after bitmap of bitmap blocks */ + + int fs_gen; /* saved value of `reiserfs_generation' counter + see FILESYSTEM_CHANGED() macro in reiserfs_fs.h */ +#ifdef DISPLACE_NEW_PACKING_LOCALITIES + struct in_core_key key; /* key pointer, to pass to block allocator or + another low-level subsystem */ +#endif +}; + +/* These are modes of balancing */ + +/* When inserting an item. */ +#define M_INSERT 'i' +/* When inserting into (directories only) or appending onto an already + existent item. */ +#define M_PASTE 'p' +/* When deleting an item. */ +#define M_DELETE 'd' +/* When truncating an item or removing an entry from a (directory) item. */ +#define M_CUT 'c' + +/* used when balancing on leaf level skipped (in reiserfsck) */ +#define M_INTERNAL 'n' + +/* When further balancing is not needed, then do_balance does not need + to be called. */ +#define M_SKIP_BALANCING 's' +#define M_CONVERT 'v' + +/* modes of leaf_move_items */ +#define LEAF_FROM_S_TO_L 0 +#define LEAF_FROM_S_TO_R 1 +#define LEAF_FROM_R_TO_L 2 +#define LEAF_FROM_L_TO_R 3 +#define LEAF_FROM_S_TO_SNEW 4 + +#define FIRST_TO_LAST 0 +#define LAST_TO_FIRST 1 + +/* used in do_balance for passing parent of node information that has + been gotten from tb struct */ +struct buffer_info { + struct tree_balance *tb; + struct buffer_head *bi_bh; + struct buffer_head *bi_parent; + int bi_position; +}; + +static inline struct super_block *sb_from_tb(struct tree_balance *tb) +{ + return tb ? tb->tb_sb : NULL; +} + +static inline struct super_block *sb_from_bi(struct buffer_info *bi) +{ + return bi ? sb_from_tb(bi->tb) : NULL; +} + +/* there are 4 types of items: stat data, directory item, indirect, direct. ++-------------------+------------+--------------+------------+ +| | k_offset | k_uniqueness | mergeable? | ++-------------------+------------+--------------+------------+ +| stat data | 0 | 0 | no | ++-------------------+------------+--------------+------------+ +| 1st directory item| DOT_OFFSET |DIRENTRY_UNIQUENESS| no | +| non 1st directory | hash value | | yes | +| item | | | | ++-------------------+------------+--------------+------------+ +| indirect item | offset + 1 |TYPE_INDIRECT | if this is not the first indirect item of the object ++-------------------+------------+--------------+------------+ +| direct item | offset + 1 |TYPE_DIRECT | if not this is not the first direct item of the object ++-------------------+------------+--------------+------------+ +*/ + +struct item_operations { + int (*bytes_number) (struct item_head * ih, int block_size); + void (*decrement_key) (struct cpu_key *); + int (*is_left_mergeable) (struct reiserfs_key * ih, + unsigned long bsize); + void (*print_item) (struct item_head *, char *item); + void (*check_item) (struct item_head *, char *item); + + int (*create_vi) (struct virtual_node * vn, struct virtual_item * vi, + int is_affected, int insert_size); + int (*check_left) (struct virtual_item * vi, int free, + int start_skip, int end_skip); + int (*check_right) (struct virtual_item * vi, int free); + int (*part_size) (struct virtual_item * vi, int from, int to); + int (*unit_num) (struct virtual_item * vi); + void (*print_vi) (struct virtual_item * vi); +}; + +extern struct item_operations *item_ops[TYPE_ANY + 1]; + +#define op_bytes_number(ih,bsize) item_ops[le_ih_k_type (ih)]->bytes_number (ih, bsize) +#define op_is_left_mergeable(key,bsize) item_ops[le_key_k_type (le_key_version (key), key)]->is_left_mergeable (key, bsize) +#define op_print_item(ih,item) item_ops[le_ih_k_type (ih)]->print_item (ih, item) +#define op_check_item(ih,item) item_ops[le_ih_k_type (ih)]->check_item (ih, item) +#define op_create_vi(vn,vi,is_affected,insert_size) item_ops[le_ih_k_type ((vi)->vi_ih)]->create_vi (vn,vi,is_affected,insert_size) +#define op_check_left(vi,free,start_skip,end_skip) item_ops[(vi)->vi_index]->check_left (vi, free, start_skip, end_skip) +#define op_check_right(vi,free) item_ops[(vi)->vi_index]->check_right (vi, free) +#define op_part_size(vi,from,to) item_ops[(vi)->vi_index]->part_size (vi, from, to) +#define op_unit_num(vi) item_ops[(vi)->vi_index]->unit_num (vi) +#define op_print_vi(vi) item_ops[(vi)->vi_index]->print_vi (vi) + +#define COMP_SHORT_KEYS comp_short_keys + +/* number of blocks pointed to by the indirect item */ +#define I_UNFM_NUM(ih) (ih_item_len(ih) / UNFM_P_SIZE) + +/* the used space within the unformatted node corresponding to pos within the item pointed to by ih */ +#define I_POS_UNFM_SIZE(ih,pos,size) (((pos) == I_UNFM_NUM(ih) - 1 ) ? (size) - ih_free_space(ih) : (size)) + +/* number of bytes contained by the direct item or the unformatted nodes the indirect item points to */ + +/* get the item header */ +#define B_N_PITEM_HEAD(bh,item_num) ( (struct item_head * )((bh)->b_data + BLKH_SIZE) + (item_num) ) + +/* get key */ +#define B_N_PDELIM_KEY(bh,item_num) ( (struct reiserfs_key * )((bh)->b_data + BLKH_SIZE) + (item_num) ) + +/* get the key */ +#define B_N_PKEY(bh,item_num) ( &(B_N_PITEM_HEAD(bh,item_num)->ih_key) ) + +/* get item body */ +#define B_N_PITEM(bh,item_num) ( (bh)->b_data + ih_location(B_N_PITEM_HEAD((bh),(item_num)))) + +/* get the stat data by the buffer header and the item order */ +#define B_N_STAT_DATA(bh,nr) \ +( (struct stat_data *)((bh)->b_data + ih_location(B_N_PITEM_HEAD((bh),(nr))) ) ) + + /* following defines use reiserfs buffer header and item header */ + +/* get stat-data */ +#define B_I_STAT_DATA(bh, ih) ( (struct stat_data * )((bh)->b_data + ih_location(ih)) ) + +// this is 3976 for size==4096 +#define MAX_DIRECT_ITEM_LEN(size) ((size) - BLKH_SIZE - 2*IH_SIZE - SD_SIZE - UNFM_P_SIZE) + +/* indirect items consist of entries which contain blocknrs, pos + indicates which entry, and B_I_POS_UNFM_POINTER resolves to the + blocknr contained by the entry pos points to */ +#define B_I_POS_UNFM_POINTER(bh,ih,pos) le32_to_cpu(*(((unp_t *)B_I_PITEM(bh,ih)) + (pos))) +#define PUT_B_I_POS_UNFM_POINTER(bh,ih,pos, val) do {*(((unp_t *)B_I_PITEM(bh,ih)) + (pos)) = cpu_to_le32(val); } while (0) + +struct reiserfs_iget_args { + __u32 objectid; + __u32 dirid; +}; + +/***************************************************************************/ +/* FUNCTION DECLARATIONS */ +/***************************************************************************/ + +#define get_journal_desc_magic(bh) (bh->b_data + bh->b_size - 12) + +#define journal_trans_half(blocksize) \ + ((blocksize - sizeof (struct reiserfs_journal_desc) + sizeof (__u32) - 12) / sizeof (__u32)) + +/* journal.c see journal.c for all the comments here */ + +/* first block written in a commit. */ +struct reiserfs_journal_desc { + __le32 j_trans_id; /* id of commit */ + __le32 j_len; /* length of commit. len +1 is the commit block */ + __le32 j_mount_id; /* mount id of this trans */ + __le32 j_realblock[1]; /* real locations for each block */ +}; + +#define get_desc_trans_id(d) le32_to_cpu((d)->j_trans_id) +#define get_desc_trans_len(d) le32_to_cpu((d)->j_len) +#define get_desc_mount_id(d) le32_to_cpu((d)->j_mount_id) + +#define set_desc_trans_id(d,val) do { (d)->j_trans_id = cpu_to_le32 (val); } while (0) +#define set_desc_trans_len(d,val) do { (d)->j_len = cpu_to_le32 (val); } while (0) +#define set_desc_mount_id(d,val) do { (d)->j_mount_id = cpu_to_le32 (val); } while (0) + +/* last block written in a commit */ +struct reiserfs_journal_commit { + __le32 j_trans_id; /* must match j_trans_id from the desc block */ + __le32 j_len; /* ditto */ + __le32 j_realblock[1]; /* real locations for each block */ +}; + +#define get_commit_trans_id(c) le32_to_cpu((c)->j_trans_id) +#define get_commit_trans_len(c) le32_to_cpu((c)->j_len) +#define get_commit_mount_id(c) le32_to_cpu((c)->j_mount_id) + +#define set_commit_trans_id(c,val) do { (c)->j_trans_id = cpu_to_le32 (val); } while (0) +#define set_commit_trans_len(c,val) do { (c)->j_len = cpu_to_le32 (val); } while (0) + +/* this header block gets written whenever a transaction is considered fully flushed, and is more recent than the +** last fully flushed transaction. fully flushed means all the log blocks and all the real blocks are on disk, +** and this transaction does not need to be replayed. +*/ +struct reiserfs_journal_header { + __le32 j_last_flush_trans_id; /* id of last fully flushed transaction */ + __le32 j_first_unflushed_offset; /* offset in the log of where to start replay after a crash */ + __le32 j_mount_id; + /* 12 */ struct journal_params jh_journal; +}; + +/* biggest tunable defines are right here */ +#define JOURNAL_BLOCK_COUNT 8192 /* number of blocks in the journal */ +#define JOURNAL_TRANS_MAX_DEFAULT 1024 /* biggest possible single transaction, don't change for now (8/3/99) */ +#define JOURNAL_TRANS_MIN_DEFAULT 256 +#define JOURNAL_MAX_BATCH_DEFAULT 900 /* max blocks to batch into one transaction, don't make this any bigger than 900 */ +#define JOURNAL_MIN_RATIO 2 +#define JOURNAL_MAX_COMMIT_AGE 30 +#define JOURNAL_MAX_TRANS_AGE 30 +#define JOURNAL_PER_BALANCE_CNT (3 * (MAX_HEIGHT-2) + 9) +#define JOURNAL_BLOCKS_PER_OBJECT(sb) (JOURNAL_PER_BALANCE_CNT * 3 + \ + 2 * (REISERFS_QUOTA_INIT_BLOCKS(sb) + \ + REISERFS_QUOTA_TRANS_BLOCKS(sb))) + +#ifdef CONFIG_QUOTA +#define REISERFS_QUOTA_OPTS ((1 << REISERFS_USRQUOTA) | (1 << REISERFS_GRPQUOTA)) +/* We need to update data and inode (atime) */ +#define REISERFS_QUOTA_TRANS_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? 2 : 0) +/* 1 balancing, 1 bitmap, 1 data per write + stat data update */ +#define REISERFS_QUOTA_INIT_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? \ +(DQUOT_INIT_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_INIT_REWRITE+1) : 0) +/* same as with INIT */ +#define REISERFS_QUOTA_DEL_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? \ +(DQUOT_DEL_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_DEL_REWRITE+1) : 0) +#else +#define REISERFS_QUOTA_TRANS_BLOCKS(s) 0 +#define REISERFS_QUOTA_INIT_BLOCKS(s) 0 +#define REISERFS_QUOTA_DEL_BLOCKS(s) 0 +#endif + +/* both of these can be as low as 1, or as high as you want. The min is the +** number of 4k bitmap nodes preallocated on mount. New nodes are allocated +** as needed, and released when transactions are committed. On release, if +** the current number of nodes is > max, the node is freed, otherwise, +** it is put on a free list for faster use later. +*/ +#define REISERFS_MIN_BITMAP_NODES 10 +#define REISERFS_MAX_BITMAP_NODES 100 + +#define JBH_HASH_SHIFT 13 /* these are based on journal hash size of 8192 */ +#define JBH_HASH_MASK 8191 + +#define _jhashfn(sb,block) \ + (((unsigned long)sb>>L1_CACHE_SHIFT) ^ \ + (((block)<<(JBH_HASH_SHIFT - 6)) ^ ((block) >> 13) ^ ((block) << (JBH_HASH_SHIFT - 12)))) +#define journal_hash(t,sb,block) ((t)[_jhashfn((sb),(block)) & JBH_HASH_MASK]) + +// We need these to make journal.c code more readable +#define journal_find_get_block(s, block) __find_get_block(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize) +#define journal_getblk(s, block) __getblk(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize) +#define journal_bread(s, block) __bread(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize) + +enum reiserfs_bh_state_bits { + BH_JDirty = BH_PrivateStart, /* buffer is in current transaction */ + BH_JDirty_wait, + BH_JNew, /* disk block was taken off free list before + * being in a finished transaction, or + * written to disk. Can be reused immed. */ + BH_JPrepared, + BH_JRestore_dirty, + BH_JTest, // debugging only will go away +}; + +BUFFER_FNS(JDirty, journaled); +TAS_BUFFER_FNS(JDirty, journaled); +BUFFER_FNS(JDirty_wait, journal_dirty); +TAS_BUFFER_FNS(JDirty_wait, journal_dirty); +BUFFER_FNS(JNew, journal_new); +TAS_BUFFER_FNS(JNew, journal_new); +BUFFER_FNS(JPrepared, journal_prepared); +TAS_BUFFER_FNS(JPrepared, journal_prepared); +BUFFER_FNS(JRestore_dirty, journal_restore_dirty); +TAS_BUFFER_FNS(JRestore_dirty, journal_restore_dirty); +BUFFER_FNS(JTest, journal_test); +TAS_BUFFER_FNS(JTest, journal_test); + +/* +** transaction handle which is passed around for all journal calls +*/ +struct reiserfs_transaction_handle { + struct super_block *t_super; /* super for this FS when journal_begin was + called. saves calls to reiserfs_get_super + also used by nested transactions to make + sure they are nesting on the right FS + _must_ be first in the handle + */ + int t_refcount; + int t_blocks_logged; /* number of blocks this writer has logged */ + int t_blocks_allocated; /* number of blocks this writer allocated */ + unsigned int t_trans_id; /* sanity check, equals the current trans id */ + void *t_handle_save; /* save existing current->journal_info */ + unsigned displace_new_blocks:1; /* if new block allocation occurres, that block + should be displaced from others */ + struct list_head t_list; +}; + +/* used to keep track of ordered and tail writes, attached to the buffer + * head through b_journal_head. + */ +struct reiserfs_jh { + struct reiserfs_journal_list *jl; + struct buffer_head *bh; + struct list_head list; +}; + +void reiserfs_free_jh(struct buffer_head *bh); +int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh); +int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh); +int journal_mark_dirty(struct reiserfs_transaction_handle *, + struct super_block *, struct buffer_head *bh); + +static inline int reiserfs_file_data_log(struct inode *inode) +{ + if (reiserfs_data_log(inode->i_sb) || + (REISERFS_I(inode)->i_flags & i_data_log)) + return 1; + return 0; +} + +static inline int reiserfs_transaction_running(struct super_block *s) +{ + struct reiserfs_transaction_handle *th = current->journal_info; + if (th && th->t_super == s) + return 1; + if (th && th->t_super == NULL) + BUG(); + return 0; +} + +static inline int reiserfs_transaction_free_space(struct reiserfs_transaction_handle *th) +{ + return th->t_blocks_allocated - th->t_blocks_logged; +} + +struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct + super_block + *, + int count); +int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *); +int reiserfs_commit_page(struct inode *inode, struct page *page, + unsigned from, unsigned to); +int reiserfs_flush_old_commits(struct super_block *); +int reiserfs_commit_for_inode(struct inode *); +int reiserfs_inode_needs_commit(struct inode *); +void reiserfs_update_inode_transaction(struct inode *); +void reiserfs_wait_on_write_block(struct super_block *s); +void reiserfs_block_writes(struct reiserfs_transaction_handle *th); +void reiserfs_allow_writes(struct super_block *s); +void reiserfs_check_lock_depth(struct super_block *s, char *caller); +int reiserfs_prepare_for_journal(struct super_block *, struct buffer_head *bh, + int wait); +void reiserfs_restore_prepared_buffer(struct super_block *, + struct buffer_head *bh); +int journal_init(struct super_block *, const char *j_dev_name, int old_format, + unsigned int); +int journal_release(struct reiserfs_transaction_handle *, struct super_block *); +int journal_release_error(struct reiserfs_transaction_handle *, + struct super_block *); +int journal_end(struct reiserfs_transaction_handle *, struct super_block *, + unsigned long); +int journal_end_sync(struct reiserfs_transaction_handle *, struct super_block *, + unsigned long); +int journal_mark_freed(struct reiserfs_transaction_handle *, + struct super_block *, b_blocknr_t blocknr); +int journal_transaction_should_end(struct reiserfs_transaction_handle *, int); +int reiserfs_in_journal(struct super_block *sb, unsigned int bmap_nr, + int bit_nr, int searchall, b_blocknr_t *next); +int journal_begin(struct reiserfs_transaction_handle *, + struct super_block *sb, unsigned long); +int journal_join_abort(struct reiserfs_transaction_handle *, + struct super_block *sb, unsigned long); +void reiserfs_abort_journal(struct super_block *sb, int errno); +void reiserfs_abort(struct super_block *sb, int errno, const char *fmt, ...); +int reiserfs_allocate_list_bitmaps(struct super_block *s, + struct reiserfs_list_bitmap *, unsigned int); + +void add_save_link(struct reiserfs_transaction_handle *th, + struct inode *inode, int truncate); +int remove_save_link(struct inode *inode, int truncate); + +/* objectid.c */ +__u32 reiserfs_get_unused_objectid(struct reiserfs_transaction_handle *th); +void reiserfs_release_objectid(struct reiserfs_transaction_handle *th, + __u32 objectid_to_release); +int reiserfs_convert_objectid_map_v1(struct super_block *); + +/* stree.c */ +int B_IS_IN_TREE(const struct buffer_head *); +extern void copy_item_head(struct item_head *to, + const struct item_head *from); + +// first key is in cpu form, second - le +extern int comp_short_keys(const struct reiserfs_key *le_key, + const struct cpu_key *cpu_key); +extern void le_key2cpu_key(struct cpu_key *to, const struct reiserfs_key *from); + +// both are in le form +extern int comp_le_keys(const struct reiserfs_key *, + const struct reiserfs_key *); +extern int comp_short_le_keys(const struct reiserfs_key *, + const struct reiserfs_key *); + +// +// get key version from on disk key - kludge +// +static inline int le_key_version(const struct reiserfs_key *key) +{ + int type; + + type = offset_v2_k_type(&(key->u.k_offset_v2)); + if (type != TYPE_DIRECT && type != TYPE_INDIRECT + && type != TYPE_DIRENTRY) + return KEY_FORMAT_3_5; + + return KEY_FORMAT_3_6; + +} + +static inline void copy_key(struct reiserfs_key *to, + const struct reiserfs_key *from) +{ + memcpy(to, from, KEY_SIZE); +} + +int comp_items(const struct item_head *stored_ih, const struct treepath *path); +const struct reiserfs_key *get_rkey(const struct treepath *chk_path, + const struct super_block *sb); +int search_by_key(struct super_block *, const struct cpu_key *, + struct treepath *, int); +#define search_item(s,key,path) search_by_key (s, key, path, DISK_LEAF_NODE_LEVEL) +int search_for_position_by_key(struct super_block *sb, + const struct cpu_key *cpu_key, + struct treepath *search_path); +extern void decrement_bcount(struct buffer_head *bh); +void decrement_counters_in_path(struct treepath *search_path); +void pathrelse(struct treepath *search_path); +int reiserfs_check_path(struct treepath *p); +void pathrelse_and_restore(struct super_block *s, struct treepath *search_path); + +int reiserfs_insert_item(struct reiserfs_transaction_handle *th, + struct treepath *path, + const struct cpu_key *key, + struct item_head *ih, + struct inode *inode, const char *body); + +int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, + struct treepath *path, + const struct cpu_key *key, + struct inode *inode, + const char *body, int paste_size); + +int reiserfs_cut_from_item(struct reiserfs_transaction_handle *th, + struct treepath *path, + struct cpu_key *key, + struct inode *inode, + struct page *page, loff_t new_file_size); + +int reiserfs_delete_item(struct reiserfs_transaction_handle *th, + struct treepath *path, + const struct cpu_key *key, + struct inode *inode, struct buffer_head *un_bh); + +void reiserfs_delete_solid_item(struct reiserfs_transaction_handle *th, + struct inode *inode, struct reiserfs_key *key); +int reiserfs_delete_object(struct reiserfs_transaction_handle *th, + struct inode *inode); +int reiserfs_do_truncate(struct reiserfs_transaction_handle *th, + struct inode *inode, struct page *, + int update_timestamps); + +#define i_block_size(inode) ((inode)->i_sb->s_blocksize) +#define file_size(inode) ((inode)->i_size) +#define tail_size(inode) (file_size (inode) & (i_block_size (inode) - 1)) + +#define tail_has_to_be_packed(inode) (have_large_tails ((inode)->i_sb)?\ +!STORE_TAIL_IN_UNFM_S1(file_size (inode), tail_size(inode), inode->i_sb->s_blocksize):have_small_tails ((inode)->i_sb)?!STORE_TAIL_IN_UNFM_S2(file_size (inode), tail_size(inode), inode->i_sb->s_blocksize):0 ) + +void padd_item(char *item, int total_length, int length); + +/* inode.c */ +/* args for the create parameter of reiserfs_get_block */ +#define GET_BLOCK_NO_CREATE 0 /* don't create new blocks or convert tails */ +#define GET_BLOCK_CREATE 1 /* add anything you need to find block */ +#define GET_BLOCK_NO_HOLE 2 /* return -ENOENT for file holes */ +#define GET_BLOCK_READ_DIRECT 4 /* read the tail if indirect item not found */ +#define GET_BLOCK_NO_IMUX 8 /* i_mutex is not held, don't preallocate */ +#define GET_BLOCK_NO_DANGLE 16 /* don't leave any transactions running */ + +void reiserfs_read_locked_inode(struct inode *inode, + struct reiserfs_iget_args *args); +int reiserfs_find_actor(struct inode *inode, void *p); +int reiserfs_init_locked_inode(struct inode *inode, void *p); +void reiserfs_evict_inode(struct inode *inode); +int reiserfs_write_inode(struct inode *inode, struct writeback_control *wbc); +int reiserfs_get_block(struct inode *inode, sector_t block, + struct buffer_head *bh_result, int create); +struct dentry *reiserfs_fh_to_dentry(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type); +struct dentry *reiserfs_fh_to_parent(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type); +int reiserfs_encode_fh(struct dentry *dentry, __u32 * data, int *lenp, + int connectable); + +int reiserfs_truncate_file(struct inode *, int update_timestamps); +void make_cpu_key(struct cpu_key *cpu_key, struct inode *inode, loff_t offset, + int type, int key_length); +void make_le_item_head(struct item_head *ih, const struct cpu_key *key, + int version, + loff_t offset, int type, int length, int entry_count); +struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key); + +struct reiserfs_security_handle; +int reiserfs_new_inode(struct reiserfs_transaction_handle *th, + struct inode *dir, umode_t mode, + const char *symname, loff_t i_size, + struct dentry *dentry, struct inode *inode, + struct reiserfs_security_handle *security); + +void reiserfs_update_sd_size(struct reiserfs_transaction_handle *th, + struct inode *inode, loff_t size); + +static inline void reiserfs_update_sd(struct reiserfs_transaction_handle *th, + struct inode *inode) +{ + reiserfs_update_sd_size(th, inode, inode->i_size); +} + +void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode); +void i_attrs_to_sd_attrs(struct inode *inode, __u16 * sd_attrs); +int reiserfs_setattr(struct dentry *dentry, struct iattr *attr); + +int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len); + +/* namei.c */ +void set_de_name_and_namelen(struct reiserfs_dir_entry *de); +int search_by_entry_key(struct super_block *sb, const struct cpu_key *key, + struct treepath *path, struct reiserfs_dir_entry *de); +struct dentry *reiserfs_get_parent(struct dentry *); + +#ifdef CONFIG_REISERFS_PROC_INFO +int reiserfs_proc_info_init(struct super_block *sb); +int reiserfs_proc_info_done(struct super_block *sb); +int reiserfs_proc_info_global_init(void); +int reiserfs_proc_info_global_done(void); + +#define PROC_EXP( e ) e + +#define __PINFO( sb ) REISERFS_SB(sb) -> s_proc_info_data +#define PROC_INFO_MAX( sb, field, value ) \ + __PINFO( sb ).field = \ + max( REISERFS_SB( sb ) -> s_proc_info_data.field, value ) +#define PROC_INFO_INC( sb, field ) ( ++ ( __PINFO( sb ).field ) ) +#define PROC_INFO_ADD( sb, field, val ) ( __PINFO( sb ).field += ( val ) ) +#define PROC_INFO_BH_STAT( sb, bh, level ) \ + PROC_INFO_INC( sb, sbk_read_at[ ( level ) ] ); \ + PROC_INFO_ADD( sb, free_at[ ( level ) ], B_FREE_SPACE( bh ) ); \ + PROC_INFO_ADD( sb, items_at[ ( level ) ], B_NR_ITEMS( bh ) ) +#else +static inline int reiserfs_proc_info_init(struct super_block *sb) +{ + return 0; +} + +static inline int reiserfs_proc_info_done(struct super_block *sb) +{ + return 0; +} + +static inline int reiserfs_proc_info_global_init(void) +{ + return 0; +} + +static inline int reiserfs_proc_info_global_done(void) +{ + return 0; +} + +#define PROC_EXP( e ) +#define VOID_V ( ( void ) 0 ) +#define PROC_INFO_MAX( sb, field, value ) VOID_V +#define PROC_INFO_INC( sb, field ) VOID_V +#define PROC_INFO_ADD( sb, field, val ) VOID_V +#define PROC_INFO_BH_STAT(sb, bh, n_node_level) VOID_V +#endif + +/* dir.c */ +extern const struct inode_operations reiserfs_dir_inode_operations; +extern const struct inode_operations reiserfs_symlink_inode_operations; +extern const struct inode_operations reiserfs_special_inode_operations; +extern const struct file_operations reiserfs_dir_operations; +int reiserfs_readdir_dentry(struct dentry *, void *, filldir_t, loff_t *); + +/* tail_conversion.c */ +int direct2indirect(struct reiserfs_transaction_handle *, struct inode *, + struct treepath *, struct buffer_head *, loff_t); +int indirect2direct(struct reiserfs_transaction_handle *, struct inode *, + struct page *, struct treepath *, const struct cpu_key *, + loff_t, char *); +void reiserfs_unmap_buffer(struct buffer_head *); + +/* file.c */ +extern const struct inode_operations reiserfs_file_inode_operations; +extern const struct file_operations reiserfs_file_operations; +extern const struct address_space_operations reiserfs_address_space_operations; + +/* fix_nodes.c */ + +int fix_nodes(int n_op_mode, struct tree_balance *tb, + struct item_head *ins_ih, const void *); +void unfix_nodes(struct tree_balance *); + +/* prints.c */ +void __reiserfs_panic(struct super_block *s, const char *id, + const char *function, const char *fmt, ...) + __attribute__ ((noreturn)); +#define reiserfs_panic(s, id, fmt, args...) \ + __reiserfs_panic(s, id, __func__, fmt, ##args) +void __reiserfs_error(struct super_block *s, const char *id, + const char *function, const char *fmt, ...); +#define reiserfs_error(s, id, fmt, args...) \ + __reiserfs_error(s, id, __func__, fmt, ##args) +void reiserfs_info(struct super_block *s, const char *fmt, ...); +void reiserfs_debug(struct super_block *s, int level, const char *fmt, ...); +void print_indirect_item(struct buffer_head *bh, int item_num); +void store_print_tb(struct tree_balance *tb); +void print_cur_tb(char *mes); +void print_de(struct reiserfs_dir_entry *de); +void print_bi(struct buffer_info *bi, char *mes); +#define PRINT_LEAF_ITEMS 1 /* print all items */ +#define PRINT_DIRECTORY_ITEMS 2 /* print directory items */ +#define PRINT_DIRECT_ITEMS 4 /* print contents of direct items */ +void print_block(struct buffer_head *bh, ...); +void print_bmap(struct super_block *s, int silent); +void print_bmap_block(int i, char *data, int size, int silent); +/*void print_super_block (struct super_block * s, char * mes);*/ +void print_objectid_map(struct super_block *s); +void print_block_head(struct buffer_head *bh, char *mes); +void check_leaf(struct buffer_head *bh); +void check_internal(struct buffer_head *bh); +void print_statistics(struct super_block *s); +char *reiserfs_hashname(int code); + +/* lbalance.c */ +int leaf_move_items(int shift_mode, struct tree_balance *tb, int mov_num, + int mov_bytes, struct buffer_head *Snew); +int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes); +int leaf_shift_right(struct tree_balance *tb, int shift_num, int shift_bytes); +void leaf_delete_items(struct buffer_info *cur_bi, int last_first, int first, + int del_num, int del_bytes); +void leaf_insert_into_buf(struct buffer_info *bi, int before, + struct item_head *inserted_item_ih, + const char *inserted_item_body, int zeros_number); +void leaf_paste_in_buffer(struct buffer_info *bi, int pasted_item_num, + int pos_in_item, int paste_size, const char *body, + int zeros_number); +void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num, + int pos_in_item, int cut_size); +void leaf_paste_entries(struct buffer_info *bi, int item_num, int before, + int new_entry_count, struct reiserfs_de_head *new_dehs, + const char *records, int paste_size); +/* ibalance.c */ +int balance_internal(struct tree_balance *, int, int, struct item_head *, + struct buffer_head **); + +/* do_balance.c */ +void do_balance_mark_leaf_dirty(struct tree_balance *tb, + struct buffer_head *bh, int flag); +#define do_balance_mark_internal_dirty do_balance_mark_leaf_dirty +#define do_balance_mark_sb_dirty do_balance_mark_leaf_dirty + +void do_balance(struct tree_balance *tb, struct item_head *ih, + const char *body, int flag); +void reiserfs_invalidate_buffer(struct tree_balance *tb, + struct buffer_head *bh); + +int get_left_neighbor_position(struct tree_balance *tb, int h); +int get_right_neighbor_position(struct tree_balance *tb, int h); +void replace_key(struct tree_balance *tb, struct buffer_head *, int, + struct buffer_head *, int); +void make_empty_node(struct buffer_info *); +struct buffer_head *get_FEB(struct tree_balance *); + +/* bitmap.c */ + +/* structure contains hints for block allocator, and it is a container for + * arguments, such as node, search path, transaction_handle, etc. */ +struct __reiserfs_blocknr_hint { + struct inode *inode; /* inode passed to allocator, if we allocate unf. nodes */ + sector_t block; /* file offset, in blocks */ + struct in_core_key key; + struct treepath *path; /* search path, used by allocator to deternine search_start by + * various ways */ + struct reiserfs_transaction_handle *th; /* transaction handle is needed to log super blocks and + * bitmap blocks changes */ + b_blocknr_t beg, end; + b_blocknr_t search_start; /* a field used to transfer search start value (block number) + * between different block allocator procedures + * (determine_search_start() and others) */ + int prealloc_size; /* is set in determine_prealloc_size() function, used by underlayed + * function that do actual allocation */ + + unsigned formatted_node:1; /* the allocator uses different polices for getting disk space for + * formatted/unformatted blocks with/without preallocation */ + unsigned preallocate:1; +}; + +typedef struct __reiserfs_blocknr_hint reiserfs_blocknr_hint_t; + +int reiserfs_parse_alloc_options(struct super_block *, char *); +void reiserfs_init_alloc_options(struct super_block *s); + +/* + * given a directory, this will tell you what packing locality + * to use for a new object underneat it. The locality is returned + * in disk byte order (le). + */ +__le32 reiserfs_choose_packing(struct inode *dir); + +int reiserfs_init_bitmap_cache(struct super_block *sb); +void reiserfs_free_bitmap_cache(struct super_block *sb); +void reiserfs_cache_bitmap_metadata(struct super_block *sb, struct buffer_head *bh, struct reiserfs_bitmap_info *info); +struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb, unsigned int bitmap); +int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value); +void reiserfs_free_block(struct reiserfs_transaction_handle *th, struct inode *, + b_blocknr_t, int for_unformatted); +int reiserfs_allocate_blocknrs(reiserfs_blocknr_hint_t *, b_blocknr_t *, int, + int); +static inline int reiserfs_new_form_blocknrs(struct tree_balance *tb, + b_blocknr_t * new_blocknrs, + int amount_needed) +{ + reiserfs_blocknr_hint_t hint = { + .th = tb->transaction_handle, + .path = tb->tb_path, + .inode = NULL, + .key = tb->key, + .block = 0, + .formatted_node = 1 + }; + return reiserfs_allocate_blocknrs(&hint, new_blocknrs, amount_needed, + 0); +} + +static inline int reiserfs_new_unf_blocknrs(struct reiserfs_transaction_handle + *th, struct inode *inode, + b_blocknr_t * new_blocknrs, + struct treepath *path, + sector_t block) +{ + reiserfs_blocknr_hint_t hint = { + .th = th, + .path = path, + .inode = inode, + .block = block, + .formatted_node = 0, + .preallocate = 0 + }; + return reiserfs_allocate_blocknrs(&hint, new_blocknrs, 1, 0); +} + +#ifdef REISERFS_PREALLOCATE +static inline int reiserfs_new_unf_blocknrs2(struct reiserfs_transaction_handle + *th, struct inode *inode, + b_blocknr_t * new_blocknrs, + struct treepath *path, + sector_t block) +{ + reiserfs_blocknr_hint_t hint = { + .th = th, + .path = path, + .inode = inode, + .block = block, + .formatted_node = 0, + .preallocate = 1 + }; + return reiserfs_allocate_blocknrs(&hint, new_blocknrs, 1, 0); +} + +void reiserfs_discard_prealloc(struct reiserfs_transaction_handle *th, + struct inode *inode); +void reiserfs_discard_all_prealloc(struct reiserfs_transaction_handle *th); +#endif + +/* hashes.c */ +__u32 keyed_hash(const signed char *msg, int len); +__u32 yura_hash(const signed char *msg, int len); +__u32 r5_hash(const signed char *msg, int len); + +#define reiserfs_set_le_bit __set_bit_le +#define reiserfs_test_and_set_le_bit __test_and_set_bit_le +#define reiserfs_clear_le_bit __clear_bit_le +#define reiserfs_test_and_clear_le_bit __test_and_clear_bit_le +#define reiserfs_test_le_bit test_bit_le +#define reiserfs_find_next_zero_le_bit find_next_zero_bit_le + +/* sometimes reiserfs_truncate may require to allocate few new blocks + to perform indirect2direct conversion. People probably used to + think, that truncate should work without problems on a filesystem + without free disk space. They may complain that they can not + truncate due to lack of free disk space. This spare space allows us + to not worry about it. 500 is probably too much, but it should be + absolutely safe */ +#define SPARE_SPACE 500 + +/* prototypes from ioctl.c */ +long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); +long reiserfs_compat_ioctl(struct file *filp, + unsigned int cmd, unsigned long arg); +int reiserfs_unpack(struct inode *inode, struct file *filp); diff --git a/fs/reiserfs/resize.c b/fs/reiserfs/resize.c index 7483279b482..9a17f63c3fd 100644 --- a/fs/reiserfs/resize.c +++ b/fs/reiserfs/resize.c @@ -13,8 +13,7 @@ #include <linux/vmalloc.h> #include <linux/string.h> #include <linux/errno.h> -#include <linux/reiserfs_fs.h> -#include <linux/reiserfs_fs_sb.h> +#include "reiserfs.h" #include <linux/buffer_head.h> int reiserfs_resize(struct super_block *s, unsigned long block_count_new) diff --git a/fs/reiserfs/stree.c b/fs/reiserfs/stree.c index 77df82f9e70..f8afa4b162b 100644 --- a/fs/reiserfs/stree.c +++ b/fs/reiserfs/stree.c @@ -51,7 +51,7 @@ #include <linux/time.h> #include <linux/string.h> #include <linux/pagemap.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/buffer_head.h> #include <linux/quotaops.h> diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index e12d8b97cd4..8b7616ef06d 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -16,9 +16,9 @@ #include <linux/vmalloc.h> #include <linux/time.h> #include <asm/uaccess.h> -#include <linux/reiserfs_fs.h> -#include <linux/reiserfs_acl.h> -#include <linux/reiserfs_xattr.h> +#include "reiserfs.h" +#include "acl.h" +#include "xattr.h" #include <linux/init.h> #include <linux/blkdev.h> #include <linux/buffer_head.h> @@ -1874,11 +1874,9 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent) unlock_new_inode(root_inode); } - s->s_root = d_alloc_root(root_inode); - if (!s->s_root) { - iput(root_inode); + s->s_root = d_make_root(root_inode); + if (!s->s_root) goto error; - } // define and initialize hash function sbi->s_hash_function = hash_function(s); if (sbi->s_hash_function == NULL) { diff --git a/fs/reiserfs/tail_conversion.c b/fs/reiserfs/tail_conversion.c index 8f546bd473b..5e2624d12f7 100644 --- a/fs/reiserfs/tail_conversion.c +++ b/fs/reiserfs/tail_conversion.c @@ -5,7 +5,7 @@ #include <linux/time.h> #include <linux/pagemap.h> #include <linux/buffer_head.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" /* access to tail : when one is going to read tail it must make sure, that is not running. direct2indirect and indirect2direct can not run concurrently */ diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c index c24deda8a8b..46fc1c20a6b 100644 --- a/fs/reiserfs/xattr.c +++ b/fs/reiserfs/xattr.c @@ -33,7 +33,7 @@ * The xattrs themselves are protected by the xattr_sem. */ -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/capability.h> #include <linux/dcache.h> #include <linux/namei.h> @@ -43,8 +43,8 @@ #include <linux/file.h> #include <linux/pagemap.h> #include <linux/xattr.h> -#include <linux/reiserfs_xattr.h> -#include <linux/reiserfs_acl.h> +#include "xattr.h" +#include "acl.h" #include <asm/uaccess.h> #include <net/checksum.h> #include <linux/stat.h> diff --git a/fs/reiserfs/xattr.h b/fs/reiserfs/xattr.h new file mode 100644 index 00000000000..f59626c5d33 --- /dev/null +++ b/fs/reiserfs/xattr.h @@ -0,0 +1,122 @@ +#include <linux/reiserfs_xattr.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/rwsem.h> + +struct inode; +struct dentry; +struct iattr; +struct super_block; +struct nameidata; + +int reiserfs_xattr_register_handlers(void) __init; +void reiserfs_xattr_unregister_handlers(void); +int reiserfs_xattr_init(struct super_block *sb, int mount_flags); +int reiserfs_lookup_privroot(struct super_block *sb); +int reiserfs_delete_xattrs(struct inode *inode); +int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs); +int reiserfs_permission(struct inode *inode, int mask); + +#ifdef CONFIG_REISERFS_FS_XATTR +#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir) +ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name, + void *buffer, size_t size); +int reiserfs_setxattr(struct dentry *dentry, const char *name, + const void *value, size_t size, int flags); +ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size); +int reiserfs_removexattr(struct dentry *dentry, const char *name); + +int reiserfs_xattr_get(struct inode *, const char *, void *, size_t); +int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int); +int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *, + struct inode *, const char *, const void *, + size_t, int); + +extern const struct xattr_handler reiserfs_xattr_user_handler; +extern const struct xattr_handler reiserfs_xattr_trusted_handler; +extern const struct xattr_handler reiserfs_xattr_security_handler; +#ifdef CONFIG_REISERFS_FS_SECURITY +int reiserfs_security_init(struct inode *dir, struct inode *inode, + const struct qstr *qstr, + struct reiserfs_security_handle *sec); +int reiserfs_security_write(struct reiserfs_transaction_handle *th, + struct inode *inode, + struct reiserfs_security_handle *sec); +void reiserfs_security_free(struct reiserfs_security_handle *sec); +#endif + +static inline int reiserfs_xattrs_initialized(struct super_block *sb) +{ + return REISERFS_SB(sb)->priv_root != NULL; +} + +#define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header)) +static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size) +{ + loff_t ret = 0; + if (reiserfs_file_data_log(inode)) { + ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize); + ret >>= inode->i_sb->s_blocksize_bits; + } + return ret; +} + +/* We may have to create up to 3 objects: xattr root, xattr dir, xattr file. + * Let's try to be smart about it. + * xattr root: We cache it. If it's not cached, we may need to create it. + * xattr dir: If anything has been loaded for this inode, we can set a flag + * saying so. + * xattr file: Since we don't cache xattrs, we can't tell. We always include + * blocks for it. + * + * However, since root and dir can be created between calls - YOU MUST SAVE + * THIS VALUE. + */ +static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode) +{ + size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); + + if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) { + nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); + if (!REISERFS_SB(inode->i_sb)->xattr_root->d_inode) + nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); + } + + return nblocks; +} + +static inline void reiserfs_init_xattr_rwsem(struct inode *inode) +{ + init_rwsem(&REISERFS_I(inode)->i_xattr_sem); +} + +#else + +#define reiserfs_getxattr NULL +#define reiserfs_setxattr NULL +#define reiserfs_listxattr NULL +#define reiserfs_removexattr NULL + +static inline void reiserfs_init_xattr_rwsem(struct inode *inode) +{ +} +#endif /* CONFIG_REISERFS_FS_XATTR */ + +#ifndef CONFIG_REISERFS_FS_SECURITY +static inline int reiserfs_security_init(struct inode *dir, + struct inode *inode, + const struct qstr *qstr, + struct reiserfs_security_handle *sec) +{ + return 0; +} +static inline int +reiserfs_security_write(struct reiserfs_transaction_handle *th, + struct inode *inode, + struct reiserfs_security_handle *sec) +{ + return 0; +} +static inline void reiserfs_security_free(struct reiserfs_security_handle *sec) +{} +#endif diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c index 6da0396e505..44474f9b990 100644 --- a/fs/reiserfs/xattr_acl.c +++ b/fs/reiserfs/xattr_acl.c @@ -1,14 +1,14 @@ #include <linux/capability.h> #include <linux/fs.h> #include <linux/posix_acl.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/errno.h> #include <linux/pagemap.h> #include <linux/xattr.h> #include <linux/slab.h> #include <linux/posix_acl_xattr.h> -#include <linux/reiserfs_xattr.h> -#include <linux/reiserfs_acl.h> +#include "xattr.h" +#include "acl.h" #include <asm/uaccess.h> static int reiserfs_set_acl(struct reiserfs_transaction_handle *th, diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c index 534668fa41b..800a3cef6f6 100644 --- a/fs/reiserfs/xattr_security.c +++ b/fs/reiserfs/xattr_security.c @@ -1,10 +1,10 @@ -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/errno.h> #include <linux/fs.h> #include <linux/pagemap.h> #include <linux/xattr.h> #include <linux/slab.h> -#include <linux/reiserfs_xattr.h> +#include "xattr.h" #include <linux/security.h> #include <asm/uaccess.h> diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c index 9883736ce3e..a0035719f66 100644 --- a/fs/reiserfs/xattr_trusted.c +++ b/fs/reiserfs/xattr_trusted.c @@ -1,10 +1,10 @@ -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/capability.h> #include <linux/errno.h> #include <linux/fs.h> #include <linux/pagemap.h> #include <linux/xattr.h> -#include <linux/reiserfs_xattr.h> +#include "xattr.h" #include <asm/uaccess.h> static int diff --git a/fs/reiserfs/xattr_user.c b/fs/reiserfs/xattr_user.c index 45ae1a00013..8667491ae7c 100644 --- a/fs/reiserfs/xattr_user.c +++ b/fs/reiserfs/xattr_user.c @@ -1,9 +1,9 @@ -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/errno.h> #include <linux/fs.h> #include <linux/pagemap.h> #include <linux/xattr.h> -#include <linux/reiserfs_xattr.h> +#include "xattr.h" #include <asm/uaccess.h> static int diff --git a/fs/romfs/super.c b/fs/romfs/super.c index bb36ab74eb4..e64f6b5f7ae 100644 --- a/fs/romfs/super.c +++ b/fs/romfs/super.c @@ -538,14 +538,12 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent) if (IS_ERR(root)) goto error; - sb->s_root = d_alloc_root(root); + sb->s_root = d_make_root(root); if (!sb->s_root) - goto error_i; + goto error; return 0; -error_i: - iput(root); error: return -EINVAL; error_rsb_inval: diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c index ecaa2f7bdb8..970b1167e7c 100644 --- a/fs/squashfs/super.c +++ b/fs/squashfs/super.c @@ -316,11 +316,10 @@ check_directory_table: } insert_inode_hash(root); - sb->s_root = d_alloc_root(root); + sb->s_root = d_make_root(root); if (sb->s_root == NULL) { ERROR("Root inode create failed\n"); err = -ENOMEM; - iput(root); goto failed_mount; } diff --git a/fs/stat.c b/fs/stat.c index 8806b8997d2..86f13563a46 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -307,7 +307,7 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname, if (inode->i_op->readlink) { error = security_inode_readlink(path.dentry); if (!error) { - touch_atime(path.mnt, path.dentry); + touch_atime(&path); error = inode->i_op->readlink(path.dentry, buf, bufsiz); } diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c index 140f26a3428..52c3bdb66a8 100644 --- a/fs/sysfs/mount.c +++ b/fs/sysfs/mount.c @@ -61,10 +61,9 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent) } /* instantiate and link root dentry */ - root = d_alloc_root(inode); + root = d_make_root(inode); if (!root) { pr_debug("%s: could not get root dentry!\n",__func__); - iput(inode); return -ENOMEM; } root->d_fsdata = &sysfs_root; diff --git a/fs/sysv/namei.c b/fs/sysv/namei.c index b217797e621..d7466e29361 100644 --- a/fs/sysv/namei.c +++ b/fs/sysv/namei.c @@ -121,9 +121,6 @@ static int sysv_link(struct dentry * old_dentry, struct inode * dir, { struct inode *inode = old_dentry->d_inode; - if (inode->i_nlink >= SYSV_SB(inode->i_sb)->s_link_max) - return -EMLINK; - inode->i_ctime = CURRENT_TIME_SEC; inode_inc_link_count(inode); ihold(inode); @@ -134,10 +131,8 @@ static int sysv_link(struct dentry * old_dentry, struct inode * dir, static int sysv_mkdir(struct inode * dir, struct dentry *dentry, umode_t mode) { struct inode * inode; - int err = -EMLINK; + int err; - if (dir->i_nlink >= SYSV_SB(dir->i_sb)->s_link_max) - goto out; inode_inc_link_count(dir); inode = sysv_new_inode(dir, S_IFDIR|mode); @@ -251,11 +246,6 @@ static int sysv_rename(struct inode * old_dir, struct dentry * old_dentry, drop_nlink(new_inode); inode_dec_link_count(new_inode); } else { - if (dir_de) { - err = -EMLINK; - if (new_dir->i_nlink >= SYSV_SB(new_dir->i_sb)->s_link_max) - goto out_dir; - } err = sysv_add_link(new_dentry, old_inode); if (err) goto out_dir; diff --git a/fs/sysv/super.c b/fs/sysv/super.c index f60c196913e..7491c33b646 100644 --- a/fs/sysv/super.c +++ b/fs/sysv/super.c @@ -44,7 +44,7 @@ enum { JAN_1_1980 = (10*365 + 2) * 24 * 60 * 60 }; -static void detected_xenix(struct sysv_sb_info *sbi) +static void detected_xenix(struct sysv_sb_info *sbi, unsigned *max_links) { struct buffer_head *bh1 = sbi->s_bh1; struct buffer_head *bh2 = sbi->s_bh2; @@ -59,7 +59,7 @@ static void detected_xenix(struct sysv_sb_info *sbi) sbd2 = (struct xenix_super_block *) (bh2->b_data - 512); } - sbi->s_link_max = XENIX_LINK_MAX; + *max_links = XENIX_LINK_MAX; sbi->s_fic_size = XENIX_NICINOD; sbi->s_flc_size = XENIX_NICFREE; sbi->s_sbd1 = (char *)sbd1; @@ -75,7 +75,7 @@ static void detected_xenix(struct sysv_sb_info *sbi) sbi->s_nzones = fs32_to_cpu(sbi, sbd1->s_fsize); } -static void detected_sysv4(struct sysv_sb_info *sbi) +static void detected_sysv4(struct sysv_sb_info *sbi, unsigned *max_links) { struct sysv4_super_block * sbd; struct buffer_head *bh1 = sbi->s_bh1; @@ -86,7 +86,7 @@ static void detected_sysv4(struct sysv_sb_info *sbi) else sbd = (struct sysv4_super_block *) bh2->b_data; - sbi->s_link_max = SYSV_LINK_MAX; + *max_links = SYSV_LINK_MAX; sbi->s_fic_size = SYSV_NICINOD; sbi->s_flc_size = SYSV_NICFREE; sbi->s_sbd1 = (char *)sbd; @@ -103,7 +103,7 @@ static void detected_sysv4(struct sysv_sb_info *sbi) sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize); } -static void detected_sysv2(struct sysv_sb_info *sbi) +static void detected_sysv2(struct sysv_sb_info *sbi, unsigned *max_links) { struct sysv2_super_block *sbd; struct buffer_head *bh1 = sbi->s_bh1; @@ -114,7 +114,7 @@ static void detected_sysv2(struct sysv_sb_info *sbi) else sbd = (struct sysv2_super_block *) bh2->b_data; - sbi->s_link_max = SYSV_LINK_MAX; + *max_links = SYSV_LINK_MAX; sbi->s_fic_size = SYSV_NICINOD; sbi->s_flc_size = SYSV_NICFREE; sbi->s_sbd1 = (char *)sbd; @@ -131,14 +131,14 @@ static void detected_sysv2(struct sysv_sb_info *sbi) sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize); } -static void detected_coherent(struct sysv_sb_info *sbi) +static void detected_coherent(struct sysv_sb_info *sbi, unsigned *max_links) { struct coh_super_block * sbd; struct buffer_head *bh1 = sbi->s_bh1; sbd = (struct coh_super_block *) bh1->b_data; - sbi->s_link_max = COH_LINK_MAX; + *max_links = COH_LINK_MAX; sbi->s_fic_size = COH_NICINOD; sbi->s_flc_size = COH_NICFREE; sbi->s_sbd1 = (char *)sbd; @@ -154,12 +154,12 @@ static void detected_coherent(struct sysv_sb_info *sbi) sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize); } -static void detected_v7(struct sysv_sb_info *sbi) +static void detected_v7(struct sysv_sb_info *sbi, unsigned *max_links) { struct buffer_head *bh2 = sbi->s_bh2; struct v7_super_block *sbd = (struct v7_super_block *)bh2->b_data; - sbi->s_link_max = V7_LINK_MAX; + *max_links = V7_LINK_MAX; sbi->s_fic_size = V7_NICINOD; sbi->s_flc_size = V7_NICFREE; sbi->s_sbd1 = (char *)sbd; @@ -290,7 +290,7 @@ static char *flavour_names[] = { [FSTYPE_AFS] = "AFS", }; -static void (*flavour_setup[])(struct sysv_sb_info *) = { +static void (*flavour_setup[])(struct sysv_sb_info *, unsigned *) = { [FSTYPE_XENIX] = detected_xenix, [FSTYPE_SYSV4] = detected_sysv4, [FSTYPE_SYSV2] = detected_sysv2, @@ -310,7 +310,7 @@ static int complete_read_super(struct super_block *sb, int silent, int size) sbi->s_firstinodezone = 2; - flavour_setup[sbi->s_type](sbi); + flavour_setup[sbi->s_type](sbi, &sb->s_max_links); sbi->s_truncate = 1; sbi->s_ndatazones = sbi->s_nzones - sbi->s_firstdatazone; @@ -341,9 +341,8 @@ static int complete_read_super(struct super_block *sb, int silent, int size) printk("SysV FS: get root inode failed\n"); return 0; } - sb->s_root = d_alloc_root(root_inode); + sb->s_root = d_make_root(root_inode); if (!sb->s_root) { - iput(root_inode); printk("SysV FS: get root dentry failed\n"); return 0; } diff --git a/fs/sysv/sysv.h b/fs/sysv/sysv.h index 0e4b821c569..11b07672f6c 100644 --- a/fs/sysv/sysv.h +++ b/fs/sysv/sysv.h @@ -24,7 +24,6 @@ struct sysv_sb_info { char s_bytesex; /* bytesex (le/be/pdp) */ char s_truncate; /* if 1: names > SYSV_NAMELEN chars are truncated */ /* if 0: they are disallowed (ENAMETOOLONG) */ - nlink_t s_link_max; /* max number of hard links to a file */ unsigned int s_inodes_per_block; /* number of inodes per block */ unsigned int s_inodes_per_block_1; /* inodes_per_block - 1 */ unsigned int s_inodes_per_block_bits; /* log2(inodes_per_block) */ diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 63765d58445..76e4e0566ad 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -2076,15 +2076,13 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent) goto out_umount; } - sb->s_root = d_alloc_root(root); + sb->s_root = d_make_root(root); if (!sb->s_root) - goto out_iput; + goto out_umount; mutex_unlock(&c->umount_mutex); return 0; -out_iput: - iput(root); out_umount: ubifs_umount(c); out_unlock: diff --git a/fs/udf/namei.c b/fs/udf/namei.c index 08bf46edf9c..38de8f234b9 100644 --- a/fs/udf/namei.c +++ b/fs/udf/namei.c @@ -32,8 +32,6 @@ #include <linux/crc-itu-t.h> #include <linux/exportfs.h> -enum { UDF_MAX_LINKS = 0xffff }; - static inline int udf_match(int len1, const unsigned char *name1, int len2, const unsigned char *name2) { @@ -649,10 +647,6 @@ static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) struct udf_inode_info *dinfo = UDF_I(dir); struct udf_inode_info *iinfo; - err = -EMLINK; - if (dir->i_nlink >= UDF_MAX_LINKS) - goto out; - err = -EIO; inode = udf_new_inode(dir, S_IFDIR | mode, &err); if (!inode) @@ -1032,9 +1026,6 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir, struct fileIdentDesc cfi, *fi; int err; - if (inode->i_nlink >= UDF_MAX_LINKS) - return -EMLINK; - fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); if (!fi) { return err; @@ -1126,10 +1117,6 @@ static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != old_dir->i_ino) goto end_rename; - - retval = -EMLINK; - if (!new_inode && new_dir->i_nlink >= UDF_MAX_LINKS) - goto end_rename; } if (!nfi) { nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, diff --git a/fs/udf/super.c b/fs/udf/super.c index c09a84daaf5..85067b4c7e1 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -75,6 +75,8 @@ #define UDF_DEFAULT_BLOCKSIZE 2048 +enum { UDF_MAX_LINKS = 0xffff }; + /* These are the "meat" - everything else is stuffing */ static int udf_fill_super(struct super_block *, void *, int); static void udf_put_super(struct super_block *); @@ -2035,13 +2037,13 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) } /* Allocate a dentry for the root inode */ - sb->s_root = d_alloc_root(inode); + sb->s_root = d_make_root(inode); if (!sb->s_root) { udf_err(sb, "Couldn't allocate root dentry\n"); - iput(inode); goto error_out; } sb->s_maxbytes = MAX_LFS_FILESIZE; + sb->s_max_links = UDF_MAX_LINKS; return 0; error_out: diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c index 38cac199edf..a2281cadefa 100644 --- a/fs/ufs/namei.c +++ b/fs/ufs/namei.c @@ -166,10 +166,6 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir, int error; lock_ufs(dir->i_sb); - if (inode->i_nlink >= UFS_LINK_MAX) { - unlock_ufs(dir->i_sb); - return -EMLINK; - } inode->i_ctime = CURRENT_TIME_SEC; inode_inc_link_count(inode); @@ -183,10 +179,7 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir, static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode) { struct inode * inode; - int err = -EMLINK; - - if (dir->i_nlink >= UFS_LINK_MAX) - goto out; + int err; lock_ufs(dir->i_sb); inode_inc_link_count(dir); @@ -305,11 +298,6 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry, drop_nlink(new_inode); inode_dec_link_count(new_inode); } else { - if (dir_de) { - err = -EMLINK; - if (new_dir->i_nlink >= UFS_LINK_MAX) - goto out_dir; - } err = ufs_add_link(new_dentry, old_inode); if (err) goto out_dir; diff --git a/fs/ufs/super.c b/fs/ufs/super.c index 5246ee3e560..f636f6b460d 100644 --- a/fs/ufs/super.c +++ b/fs/ufs/super.c @@ -1157,16 +1157,17 @@ magic_found: "fast symlink size (%u)\n", uspi->s_maxsymlinklen); uspi->s_maxsymlinklen = maxsymlen; } + sb->s_max_links = UFS_LINK_MAX; inode = ufs_iget(sb, UFS_ROOTINO); if (IS_ERR(inode)) { ret = PTR_ERR(inode); goto failed; } - sb->s_root = d_alloc_root(inode); + sb->s_root = d_make_root(inode); if (!sb->s_root) { ret = -ENOMEM; - goto dalloc_failed; + goto failed; } ufs_setup_cstotal(sb); @@ -1180,8 +1181,6 @@ magic_found: UFSD("EXIT\n"); return 0; -dalloc_failed: - iput(inode); failed: if (ubh) ubh_brelse_uspi (uspi); diff --git a/fs/xfs/xfs_rename.c b/fs/xfs/xfs_rename.c index 866de277079..e44ef7ee8ce 100644 --- a/fs/xfs/xfs_rename.c +++ b/fs/xfs/xfs_rename.c @@ -118,17 +118,6 @@ xfs_rename( new_parent = (src_dp != target_dp); src_is_directory = S_ISDIR(src_ip->i_d.di_mode); - if (src_is_directory) { - /* - * Check for link count overflow on target_dp - */ - if (target_ip == NULL && new_parent && - target_dp->i_d.di_nlink >= XFS_MAXLINK) { - error = XFS_ERROR(EMLINK); - goto std_return; - } - } - xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip, inodes, &num_inodes); diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index ee5b695c99a..baf40e378d3 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1341,6 +1341,7 @@ xfs_fs_fill_super( sb->s_blocksize = mp->m_sb.sb_blocksize; sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); + sb->s_max_links = XFS_MAXLINK; sb->s_time_gran = 1; set_posix_acl_flag(sb); @@ -1361,10 +1362,10 @@ xfs_fs_fill_super( error = EINVAL; goto out_syncd_stop; } - sb->s_root = d_alloc_root(root); + sb->s_root = d_make_root(root); if (!sb->s_root) { error = ENOMEM; - goto out_iput; + goto out_syncd_stop; } return 0; @@ -1383,8 +1384,6 @@ xfs_fs_fill_super( out: return -error; - out_iput: - iput(root); out_syncd_stop: xfs_syncd_stop(mp); out_unmount: diff --git a/fs/xfs/xfs_utils.c b/fs/xfs/xfs_utils.c index 89dbb4a5087..79c05ac85bf 100644 --- a/fs/xfs/xfs_utils.c +++ b/fs/xfs/xfs_utils.c @@ -296,8 +296,6 @@ xfs_bumplink( xfs_trans_t *tp, xfs_inode_t *ip) { - if (ip->i_d.di_nlink >= XFS_MAXLINK) - return XFS_ERROR(EMLINK); xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); ASSERT(ip->i_d.di_nlink > 0); diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index ebdb88840a4..64981d7e737 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -917,14 +917,6 @@ xfs_create( xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); unlock_dp_on_error = B_TRUE; - /* - * Check for directory link count overflow. - */ - if (is_dir && dp->i_d.di_nlink >= XFS_MAXLINK) { - error = XFS_ERROR(EMLINK); - goto out_trans_cancel; - } - xfs_bmap_init(&free_list, &first_block); /* @@ -1429,14 +1421,6 @@ xfs_link( xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); /* - * If the source has too many links, we can't make any more to it. - */ - if (sip->i_d.di_nlink >= XFS_MAXLINK) { - error = XFS_ERROR(EMLINK); - goto error_return; - } - - /* * If we are using project inheritance, we only allow hard link * creation in our tree when the project IDs are the same; else * the tree quota mechanism could be circumvented. |