diff options
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/inode.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spufs/inode.c | 349 |
1 files changed, 160 insertions, 189 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c index 6d1228c66c5..87ba7cf99cd 100644 --- a/arch/powerpc/platforms/cell/spufs/inode.c +++ b/arch/powerpc/platforms/cell/spufs/inode.c @@ -23,6 +23,7 @@ #include <linux/file.h> #include <linux/fs.h> +#include <linux/fsnotify.h> #include <linux/backing-dev.h> #include <linux/init.h> #include <linux/ioctl.h> @@ -35,17 +36,25 @@ #include <linux/parser.h> #include <asm/prom.h> -#include <asm/semaphore.h> #include <asm/spu.h> #include <asm/spu_priv1.h> #include <asm/uaccess.h> #include "spufs.h" +struct spufs_sb_info { + int debug; +}; + static struct kmem_cache *spufs_inode_cache; char *isolated_loader; static int isolated_loader_size; +static struct spufs_sb_info *spufs_get_sb_info(struct super_block *sb) +{ + return sb->s_fs_info; +} + static struct inode * spufs_alloc_inode(struct super_block *sb) { @@ -62,14 +71,19 @@ spufs_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void -spufs_destroy_inode(struct inode *inode) +static void spufs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); } +static void spufs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, spufs_i_callback); +} + static void -spufs_init_once(struct kmem_cache *cachep, void *p) +spufs_init_once(void *p) { struct spufs_inode_info *ei = p; @@ -77,7 +91,7 @@ spufs_init_once(struct kmem_cache *cachep, void *p) } static struct inode * -spufs_new_inode(struct super_block *sb, int mode) +spufs_new_inode(struct super_block *sb, umode_t mode) { struct inode *inode; @@ -85,10 +99,10 @@ spufs_new_inode(struct super_block *sb, int mode) if (!inode) goto out; + inode->i_ino = get_next_ino(); inode->i_mode = mode; - inode->i_uid = current->fsuid; - inode->i_gid = current->fsgid; - inode->i_blocks = 0; + inode->i_uid = current_fsuid(); + inode->i_gid = current_fsgid(); inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; out: return inode; @@ -102,16 +116,18 @@ spufs_setattr(struct dentry *dentry, struct iattr *attr) if ((attr->ia_valid & ATTR_SIZE) && (attr->ia_size != inode->i_size)) return -EINVAL; - return inode_setattr(inode, attr); + setattr_copy(inode, attr); + mark_inode_dirty(inode); + return 0; } static int spufs_new_file(struct super_block *sb, struct dentry *dentry, - const struct file_operations *fops, int mode, - struct spu_context *ctx) + const struct file_operations *fops, umode_t mode, + size_t size, struct spu_context *ctx) { - static struct inode_operations spufs_file_iops = { + static const struct inode_operations spufs_file_iops = { .setattr = spufs_setattr, }; struct inode *inode; @@ -125,6 +141,7 @@ spufs_new_file(struct super_block *sb, struct dentry *dentry, ret = 0; inode->i_op = &spufs_file_iops; inode->i_fop = fops; + inode->i_size = size; inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); d_add(dentry, inode); out: @@ -132,15 +149,14 @@ out: } static void -spufs_delete_inode(struct inode *inode) +spufs_evict_inode(struct inode *inode) { struct spufs_inode_info *ei = SPUFS_I(inode); - + clear_inode(inode); if (ei->i_ctx) put_spu_context(ei->i_ctx); if (ei->i_gang) put_spu_gang(ei->i_gang); - clear_inode(inode); } static void spufs_prune_dir(struct dentry *dir) @@ -149,18 +165,18 @@ static void spufs_prune_dir(struct dentry *dir) mutex_lock(&dir->d_inode->i_mutex); list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { - spin_lock(&dcache_lock); spin_lock(&dentry->d_lock); if (!(d_unhashed(dentry)) && dentry->d_inode) { - dget_locked(dentry); + dget_dlock(dentry); __d_drop(dentry); spin_unlock(&dentry->d_lock); simple_unlink(dir->d_inode, dentry); - spin_unlock(&dcache_lock); + /* XXX: what was dcache_lock protecting here? Other + * filesystems (IB, configfs) release dcache_lock + * before unlink */ dput(dentry); } else { spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); } } shrink_dcache_parent(dir); @@ -171,46 +187,31 @@ static void spufs_prune_dir(struct dentry *dir) static int spufs_rmdir(struct inode *parent, struct dentry *dir) { /* remove all entries */ + int res; spufs_prune_dir(dir); d_drop(dir); - - return simple_rmdir(parent, dir); + res = simple_rmdir(parent, dir); + /* We have to give up the mm_struct */ + spu_forget(SPUFS_I(dir->d_inode)->i_ctx); + return res; } -static int spufs_fill_dir(struct dentry *dir, struct tree_descr *files, - int mode, struct spu_context *ctx) +static int spufs_fill_dir(struct dentry *dir, + const struct spufs_tree_descr *files, umode_t mode, + struct spu_context *ctx) { - struct dentry *dentry, *tmp; - int ret; - while (files->name && files->name[0]) { - ret = -ENOMEM; - dentry = d_alloc_name(dir, files->name); + int ret; + struct dentry *dentry = d_alloc_name(dir, files->name); if (!dentry) - goto out; + return -ENOMEM; ret = spufs_new_file(dir->d_sb, dentry, files->ops, - files->mode & mode, ctx); + files->mode & mode, files->size, ctx); if (ret) - goto out; + return ret; files++; } return 0; -out: - /* - * remove all children from dir. dir->inode is not set so don't - * just simply use spufs_prune_dir() and panic afterwards :) - * dput() looks like it will do the right thing: - * - dec parent's ref counter - * - remove child from parent's child list - * - free child's inode if possible - * - free child - */ - list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { - dput(dentry); - } - - shrink_dcache_parent(dir); - return ret; } static int spufs_dir_close(struct inode *inode, struct file *file) @@ -224,14 +225,11 @@ static int spufs_dir_close(struct inode *inode, struct file *file) parent = dir->d_parent->d_inode; ctx = SPUFS_I(dir->d_inode)->i_ctx; - mutex_lock(&parent->i_mutex); + mutex_lock_nested(&parent->i_mutex, I_MUTEX_PARENT); ret = spufs_rmdir(parent, dir); mutex_unlock(&parent->i_mutex); WARN_ON(ret); - /* We have to give up the mm_struct */ - spu_forget(ctx); - return dcache_dir_close(inode, file); } @@ -240,23 +238,22 @@ const struct file_operations spufs_context_fops = { .release = spufs_dir_close, .llseek = dcache_dir_lseek, .read = generic_read_dir, - .readdir = dcache_readdir, - .fsync = simple_sync_file, + .iterate = dcache_readdir, + .fsync = noop_fsync, }; EXPORT_SYMBOL_GPL(spufs_context_fops); static int spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, - int mode) + umode_t mode) { int ret; struct inode *inode; struct spu_context *ctx; - ret = -ENOSPC; inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); if (!inode) - goto out; + return -ENOSPC; if (dir->i_mode & S_ISGID) { inode->i_gid = dir->i_gid; @@ -264,58 +261,58 @@ spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, } ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ SPUFS_I(inode)->i_ctx = ctx; - if (!ctx) - goto out_iput; + if (!ctx) { + iput(inode); + return -ENOSPC; + } ctx->flags = flags; inode->i_op = &simple_dir_inode_operations; inode->i_fop = &simple_dir_operations; + + mutex_lock(&inode->i_mutex); + + dget(dentry); + inc_nlink(dir); + inc_nlink(inode); + + d_instantiate(dentry, inode); + if (flags & SPU_CREATE_NOSCHED) ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, mode, ctx); else ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); + if (!ret && spufs_get_sb_info(dir->i_sb)->debug) + ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, + mode, ctx); + if (ret) - goto out_free_ctx; + spufs_rmdir(dir, dentry); - d_instantiate(dentry, inode); - dget(dentry); - dir->i_nlink++; - dentry->d_inode->i_nlink++; - goto out; + mutex_unlock(&inode->i_mutex); -out_free_ctx: - spu_forget(ctx); - put_spu_context(ctx); -out_iput: - iput(inode); -out: return ret; } -static int spufs_context_open(struct dentry *dentry, struct vfsmount *mnt) +static int spufs_context_open(struct path *path) { int ret; struct file *filp; ret = get_unused_fd(); - if (ret < 0) { - dput(dentry); - mntput(mnt); - goto out; - } + if (ret < 0) + return ret; - filp = dentry_open(dentry, mnt, O_RDONLY); + filp = dentry_open(path, O_RDONLY, current_cred()); if (IS_ERR(filp)) { put_unused_fd(ret); - ret = PTR_ERR(filp); - goto out; + return PTR_ERR(filp); } filp->f_op = &spufs_context_fops; fd_install(ret, filp); -out: return ret; } @@ -350,7 +347,7 @@ spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, return ERR_PTR(-EINVAL); neighbor = get_spu_context( - SPUFS_I(filp->f_dentry->d_inode)->i_ctx); + SPUFS_I(file_inode(filp))->i_ctx); if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && @@ -423,36 +420,33 @@ spufs_set_affinity(unsigned int flags, struct spu_context *ctx, static int spufs_create_context(struct inode *inode, struct dentry *dentry, - struct vfsmount *mnt, int flags, int mode, + struct vfsmount *mnt, int flags, umode_t mode, struct file *aff_filp) { int ret; int affinity; struct spu_gang *gang; struct spu_context *neighbor; + struct path path = {.mnt = mnt, .dentry = dentry}; - ret = -EPERM; if ((flags & SPU_CREATE_NOSCHED) && !capable(CAP_SYS_NICE)) - goto out_unlock; + return -EPERM; - ret = -EINVAL; if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) == SPU_CREATE_ISOLATE) - goto out_unlock; + return -EINVAL; - ret = -ENODEV; if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) - goto out_unlock; + return -ENODEV; gang = NULL; neighbor = NULL; affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); if (affinity) { gang = SPUFS_I(inode)->i_gang; - ret = -EINVAL; if (!gang) - goto out_unlock; + return -EINVAL; mutex_lock(&gang->aff_mutex); neighbor = spufs_assert_affinity(flags, gang, aff_filp); if (IS_ERR(neighbor)) { @@ -472,30 +466,18 @@ spufs_create_context(struct inode *inode, struct dentry *dentry, put_spu_context(neighbor); } - /* - * get references for dget and mntget, will be released - * in error path of *_open(). - */ - ret = spufs_context_open(dget(dentry), mntget(mnt)); - if (ret < 0) { + ret = spufs_context_open(&path); + if (ret < 0) WARN_ON(spufs_rmdir(inode, dentry)); - mutex_unlock(&inode->i_mutex); - spu_forget(SPUFS_I(dentry->d_inode)->i_ctx); - goto out; - } out_aff_unlock: if (affinity) mutex_unlock(&gang->aff_mutex); -out_unlock: - mutex_unlock(&inode->i_mutex); -out: - dput(dentry); return ret; } static int -spufs_mkgang(struct inode *dir, struct dentry *dentry, int mode) +spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode) { int ret; struct inode *inode; @@ -521,8 +503,8 @@ spufs_mkgang(struct inode *dir, struct dentry *dentry, int mode) inode->i_fop = &simple_dir_operations; d_instantiate(dentry, inode); - dir->i_nlink++; - dentry->d_inode->i_nlink++; + inc_nlink(dir); + inc_nlink(dentry->d_inode); return ret; out_iput: @@ -531,123 +513,98 @@ out: return ret; } -static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt) +static int spufs_gang_open(struct path *path) { int ret; struct file *filp; ret = get_unused_fd(); - if (ret < 0) { - dput(dentry); - mntput(mnt); - goto out; - } + if (ret < 0) + return ret; - filp = dentry_open(dentry, mnt, O_RDONLY); + /* + * get references for dget and mntget, will be released + * in error path of *_open(). + */ + filp = dentry_open(path, O_RDONLY, current_cred()); if (IS_ERR(filp)) { put_unused_fd(ret); - ret = PTR_ERR(filp); - goto out; + return PTR_ERR(filp); } filp->f_op = &simple_dir_operations; fd_install(ret, filp); -out: return ret; } static int spufs_create_gang(struct inode *inode, struct dentry *dentry, - struct vfsmount *mnt, int mode) + struct vfsmount *mnt, umode_t mode) { + struct path path = {.mnt = mnt, .dentry = dentry}; int ret; ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO); - if (ret) - goto out; - - /* - * get references for dget and mntget, will be released - * in error path of *_open(). - */ - ret = spufs_gang_open(dget(dentry), mntget(mnt)); - if (ret < 0) { - int err = simple_rmdir(inode, dentry); - WARN_ON(err); + if (!ret) { + ret = spufs_gang_open(&path); + if (ret < 0) { + int err = simple_rmdir(inode, dentry); + WARN_ON(err); + } } - -out: - mutex_unlock(&inode->i_mutex); - dput(dentry); return ret; } static struct file_system_type spufs_type; -long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode, - struct file *filp) +long spufs_create(struct path *path, struct dentry *dentry, + unsigned int flags, umode_t mode, struct file *filp) { - struct dentry *dentry; + struct inode *dir = path->dentry->d_inode; int ret; - ret = -EINVAL; /* check if we are on spufs */ - if (nd->path.dentry->d_sb->s_type != &spufs_type) - goto out; + if (path->dentry->d_sb->s_type != &spufs_type) + return -EINVAL; /* don't accept undefined flags */ if (flags & (~SPU_CREATE_FLAG_ALL)) - goto out; + return -EINVAL; /* only threads can be underneath a gang */ - if (nd->path.dentry != nd->path.dentry->d_sb->s_root) { - if ((flags & SPU_CREATE_GANG) || - !SPUFS_I(nd->path.dentry->d_inode)->i_gang) - goto out; - } - - dentry = lookup_create(nd, 1); - ret = PTR_ERR(dentry); - if (IS_ERR(dentry)) - goto out_dir; + if (path->dentry != path->dentry->d_sb->s_root) + if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) + return -EINVAL; - ret = -EEXIST; - if (dentry->d_inode) - goto out_dput; - - mode &= ~current->fs->umask; + mode &= ~current_umask(); if (flags & SPU_CREATE_GANG) - return spufs_create_gang(nd->path.dentry->d_inode, - dentry, nd->path.mnt, mode); + ret = spufs_create_gang(dir, dentry, path->mnt, mode); else - return spufs_create_context(nd->path.dentry->d_inode, - dentry, nd->path.mnt, flags, mode, + ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, filp); + if (ret >= 0) + fsnotify_mkdir(dir, dentry); -out_dput: - dput(dentry); -out_dir: - mutex_unlock(&nd->path.dentry->d_inode->i_mutex); -out: return ret; } /* File system initialization */ enum { - Opt_uid, Opt_gid, Opt_mode, Opt_err, + Opt_uid, Opt_gid, Opt_mode, Opt_debug, Opt_err, }; -static match_table_t spufs_tokens = { - { Opt_uid, "uid=%d" }, - { Opt_gid, "gid=%d" }, - { Opt_mode, "mode=%o" }, - { Opt_err, NULL }, +static const match_table_t spufs_tokens = { + { Opt_uid, "uid=%d" }, + { Opt_gid, "gid=%d" }, + { Opt_mode, "mode=%o" }, + { Opt_debug, "debug" }, + { Opt_err, NULL }, }; static int -spufs_parse_options(char *options, struct inode *root) +spufs_parse_options(struct super_block *sb, char *options, struct inode *root) { char *p; substring_t args[MAX_OPT_ARGS]; @@ -663,18 +620,25 @@ spufs_parse_options(char *options, struct inode *root) case Opt_uid: if (match_int(&args[0], &option)) return 0; - root->i_uid = option; + root->i_uid = make_kuid(current_user_ns(), option); + if (!uid_valid(root->i_uid)) + return 0; break; case Opt_gid: if (match_int(&args[0], &option)) return 0; - root->i_gid = option; + root->i_gid = make_kgid(current_user_ns(), option); + if (!gid_valid(root->i_gid)) + return 0; break; case Opt_mode: if (match_octal(&args[0], &option)) return 0; root->i_mode = option | S_IFDIR; break; + case Opt_debug: + spufs_get_sb_info(sb)->debug = 1; + break; default: return 0; } @@ -731,15 +695,16 @@ spufs_create_root(struct super_block *sb, void *data) inode->i_op = &simple_dir_inode_operations; inode->i_fop = &simple_dir_operations; SPUFS_I(inode)->i_ctx = NULL; + inc_nlink(inode); ret = -EINVAL; - if (!spufs_parse_options(data, inode)) + if (!spufs_parse_options(sb, data, inode)) goto out_iput; ret = -ENOMEM; - sb->s_root = d_alloc_root(inode); + sb->s_root = d_make_root(inode); if (!sb->s_root) - goto out_iput; + goto out; return 0; out_iput: @@ -751,39 +716,45 @@ out: static int spufs_fill_super(struct super_block *sb, void *data, int silent) { - static struct super_operations s_ops = { + struct spufs_sb_info *info; + static const struct super_operations s_ops = { .alloc_inode = spufs_alloc_inode, .destroy_inode = spufs_destroy_inode, .statfs = simple_statfs, - .delete_inode = spufs_delete_inode, - .drop_inode = generic_delete_inode, + .evict_inode = spufs_evict_inode, .show_options = generic_show_options, }; save_mount_options(sb, data); + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize_bits = PAGE_CACHE_SHIFT; sb->s_magic = SPUFS_MAGIC; sb->s_op = &s_ops; + sb->s_fs_info = info; return spufs_create_root(sb, data); } -static int -spufs_get_sb(struct file_system_type *fstype, int flags, - const char *name, void *data, struct vfsmount *mnt) +static struct dentry * +spufs_mount(struct file_system_type *fstype, int flags, + const char *name, void *data) { - return get_sb_single(fstype, flags, data, spufs_fill_super, mnt); + return mount_single(fstype, flags, data, spufs_fill_super); } static struct file_system_type spufs_type = { .owner = THIS_MODULE, .name = "spufs", - .get_sb = spufs_get_sb, + .mount = spufs_mount, .kill_sb = kill_litter_super, }; +MODULE_ALIAS_FS("spufs"); static int __init spufs_init(void) { @@ -803,19 +774,19 @@ static int __init spufs_init(void) ret = spu_sched_init(); if (ret) goto out_cache; - ret = register_filesystem(&spufs_type); + ret = register_spu_syscalls(&spufs_calls); if (ret) goto out_sched; - ret = register_spu_syscalls(&spufs_calls); + ret = register_filesystem(&spufs_type); if (ret) - goto out_fs; + goto out_syscalls; spufs_init_isolated_loader(); return 0; -out_fs: - unregister_filesystem(&spufs_type); +out_syscalls: + unregister_spu_syscalls(&spufs_calls); out_sched: spu_sched_exit(); out_cache: |
