diff options
Diffstat (limited to 'fs/nilfs2/inode.c')
| -rw-r--r-- | fs/nilfs2/inode.c | 619 |
1 files changed, 477 insertions, 142 deletions
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c index 7868cc122ac..6252b173a46 100644 --- a/fs/nilfs2/inode.c +++ b/fs/nilfs2/inode.c @@ -22,16 +22,49 @@ */ #include <linux/buffer_head.h> +#include <linux/gfp.h> #include <linux/mpage.h> #include <linux/writeback.h> -#include <linux/uio.h> +#include <linux/aio.h> #include "nilfs.h" +#include "btnode.h" #include "segment.h" #include "page.h" #include "mdt.h" #include "cpfile.h" #include "ifile.h" +/** + * struct nilfs_iget_args - arguments used during comparison between inodes + * @ino: inode number + * @cno: checkpoint number + * @root: pointer on NILFS root object (mounted checkpoint) + * @for_gc: inode for GC flag + */ +struct nilfs_iget_args { + u64 ino; + __u64 cno; + struct nilfs_root *root; + int for_gc; +}; + +void nilfs_inode_add_blocks(struct inode *inode, int n) +{ + struct nilfs_root *root = NILFS_I(inode)->i_root; + + inode_add_bytes(inode, (1 << inode->i_blkbits) * n); + if (root) + atomic64_add(n, &root->blocks_count); +} + +void nilfs_inode_sub_blocks(struct inode *inode, int n) +{ + struct nilfs_root *root = NILFS_I(inode)->i_root; + + inode_sub_bytes(inode, (1 << inode->i_blkbits) * n); + if (root) + atomic64_sub(n, &root->blocks_count); +} /** * nilfs_get_block() - get a file block on the filesystem (callback function) @@ -48,14 +81,14 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff, struct buffer_head *bh_result, int create) { struct nilfs_inode_info *ii = NILFS_I(inode); + struct the_nilfs *nilfs = inode->i_sb->s_fs_info; __u64 blknum = 0; int err = 0, ret; - struct inode *dat = nilfs_dat_inode(NILFS_I_NILFS(inode)); unsigned maxblocks = bh_result->b_size >> inode->i_blkbits; - down_read(&NILFS_MDT(dat)->mi_sem); + down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks); - up_read(&NILFS_MDT(dat)->mi_sem); + up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); if (ret >= 0) { /* found */ map_bh(bh_result, inode->i_sb, blknum); if (ret > 0) @@ -88,11 +121,6 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff, inode->i_ino, (unsigned long long)blkoff); err = 0; - } else if (err == -EINVAL) { - nilfs_error(inode->i_sb, __func__, - "broken bmap (inode=%lu)\n", - inode->i_ino); - err = -EIO; } nilfs_transaction_abort(inode->i_sb); goto out; @@ -101,6 +129,7 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff, nilfs_transaction_commit(inode->i_sb); /* never fails */ /* Error handling should be detailed */ set_buffer_new(bh_result); + set_buffer_delay(bh_result); map_bh(bh_result, inode->i_sb, 0); /* dbn must be changed to proper value */ } else if (ret == -ENOENT) { @@ -146,6 +175,11 @@ static int nilfs_writepages(struct address_space *mapping, struct inode *inode = mapping->host; int err = 0; + if (inode->i_sb->s_flags & MS_RDONLY) { + nilfs_clear_dirty_pages(mapping, false); + return -EROFS; + } + if (wbc->sync_mode == WB_SYNC_ALL) err = nilfs_construct_dsync_segment(inode->i_sb, inode, wbc->range_start, @@ -158,6 +192,18 @@ static int nilfs_writepage(struct page *page, struct writeback_control *wbc) struct inode *inode = page->mapping->host; int err; + if (inode->i_sb->s_flags & MS_RDONLY) { + /* + * It means that filesystem was remounted in read-only + * mode because of error or metadata corruption. But we + * have dirty pages that try to be flushed in background. + * So, here we simply discard this dirty page. + */ + nilfs_clear_dirty_page(page, false); + unlock_page(page); + return -EROFS; + } + redirty_page_for_writepage(wbc, page); unlock_page(page); @@ -173,18 +219,46 @@ static int nilfs_writepage(struct page *page, struct writeback_control *wbc) static int nilfs_set_page_dirty(struct page *page) { - int ret = __set_page_dirty_buffers(page); + int ret = __set_page_dirty_nobuffers(page); - if (ret) { + if (page_has_buffers(page)) { struct inode *inode = page->mapping->host; - struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb); - unsigned nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits); - - nilfs_set_file_dirty(sbi, inode, nr_dirty); + unsigned nr_dirty = 0; + struct buffer_head *bh, *head; + + /* + * This page is locked by callers, and no other thread + * concurrently marks its buffers dirty since they are + * only dirtied through routines in fs/buffer.c in + * which call sites of mark_buffer_dirty are protected + * by page lock. + */ + bh = head = page_buffers(page); + do { + /* Do not mark hole blocks dirty */ + if (buffer_dirty(bh) || !buffer_mapped(bh)) + continue; + + set_buffer_dirty(bh); + nr_dirty++; + } while (bh = bh->b_this_page, bh != head); + + if (nr_dirty) + nilfs_set_file_dirty(inode, nr_dirty); } return ret; } +void nilfs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, inode->i_size); + nilfs_truncate(inode); + } +} + static int nilfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -196,11 +270,12 @@ static int nilfs_write_begin(struct file *file, struct address_space *mapping, if (unlikely(err)) return err; - *pagep = NULL; - err = block_write_begin(file, mapping, pos, len, flags, pagep, - fsdata, nilfs_get_block); - if (unlikely(err)) + err = block_write_begin(mapping, pos, len, flags, pagep, + nilfs_get_block); + if (unlikely(err)) { + nilfs_write_failed(mapping, pos + len); nilfs_transaction_abort(inode->i_sb); + } return err; } @@ -217,32 +292,46 @@ static int nilfs_write_end(struct file *file, struct address_space *mapping, start + copied); copied = generic_write_end(file, mapping, pos, len, copied, page, fsdata); - nilfs_set_file_dirty(NILFS_SB(inode->i_sb), inode, nr_dirty); + nilfs_set_file_dirty(inode, nr_dirty); err = nilfs_transaction_commit(inode->i_sb); return err ? : copied; } static ssize_t -nilfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, - loff_t offset, unsigned long nr_segs) +nilfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, + loff_t offset) { struct file *file = iocb->ki_filp; + struct address_space *mapping = file->f_mapping; struct inode *inode = file->f_mapping->host; + size_t count = iov_iter_count(iter); ssize_t size; if (rw == WRITE) return 0; /* Needs synchronization with the cleaner */ - size = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov, - offset, nr_segs, nilfs_get_block, NULL); + size = blockdev_direct_IO(rw, iocb, inode, iter, offset, + nilfs_get_block); + + /* + * In case of error extending write may have instantiated a few + * blocks outside i_size. Trim these off again. + */ + if (unlikely((rw & WRITE) && size < 0)) { + loff_t isize = i_size_read(inode); + loff_t end = offset + count; + + if (end > isize) + nilfs_write_failed(mapping, end); + } + return size; } const struct address_space_operations nilfs_aops = { .writepage = nilfs_writepage, .readpage = nilfs_readpage, - .sync_page = block_sync_page, .writepages = nilfs_writepages, .set_page_dirty = nilfs_set_page_dirty, .readpages = nilfs_readpages, @@ -254,12 +343,13 @@ const struct address_space_operations nilfs_aops = { .is_partially_uptodate = block_is_partially_uptodate, }; -struct inode *nilfs_new_inode(struct inode *dir, int mode) +struct inode *nilfs_new_inode(struct inode *dir, umode_t mode) { struct super_block *sb = dir->i_sb; - struct nilfs_sb_info *sbi = NILFS_SB(sb); + struct the_nilfs *nilfs = sb->s_fs_info; struct inode *inode; struct nilfs_inode_info *ii; + struct nilfs_root *root; int err = -ENOMEM; ino_t ino; @@ -270,25 +360,18 @@ struct inode *nilfs_new_inode(struct inode *dir, int mode) mapping_set_gfp_mask(inode->i_mapping, mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS); + root = NILFS_I(dir)->i_root; ii = NILFS_I(inode); ii->i_state = 1 << NILFS_I_NEW; + ii->i_root = root; - err = nilfs_ifile_create_inode(sbi->s_ifile, &ino, &ii->i_bh); + err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh); if (unlikely(err)) goto failed_ifile_create_inode; /* reference count of i_bh inherits from nilfs_mdt_read_block() */ - atomic_inc(&sbi->s_inodes_count); - - inode->i_uid = current_fsuid(); - if (dir->i_mode & S_ISGID) { - inode->i_gid = dir->i_gid; - if (S_ISDIR(mode)) - mode |= S_ISGID; - } else - inode->i_gid = current_fsgid(); - - inode->i_mode = mode; + atomic64_inc(&root->inodes_count); + inode_init_owner(inode, dir, mode); inode->i_ino = ino; inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; @@ -301,20 +384,16 @@ struct inode *nilfs_new_inode(struct inode *dir, int mode) /* No lock is needed; iget() ensures it. */ } - ii->i_flags = NILFS_I(dir)->i_flags; - if (S_ISLNK(mode)) - ii->i_flags &= ~(NILFS_IMMUTABLE_FL | NILFS_APPEND_FL); - if (!S_ISDIR(mode)) - ii->i_flags &= ~NILFS_DIRSYNC_FL; + ii->i_flags = nilfs_mask_flags( + mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED); /* ii->i_file_acl = 0; */ /* ii->i_dir_acl = 0; */ ii->i_dir_start_lookup = 0; - ii->i_cno = 0; nilfs_set_inode_flags(inode); - spin_lock(&sbi->s_next_gen_lock); - inode->i_generation = sbi->s_next_generation++; - spin_unlock(&sbi->s_next_gen_lock); + spin_lock(&nilfs->ns_next_gen_lock); + inode->i_generation = nilfs->ns_next_generation++; + spin_unlock(&nilfs->ns_next_gen_lock); insert_inode_hash(inode); err = nilfs_init_acl(inode, dir); @@ -327,7 +406,7 @@ struct inode *nilfs_new_inode(struct inode *dir, int mode) failed_acl: failed_bmap: - inode->i_nlink = 0; + clear_nlink(inode); iput(inode); /* raw_inode will be deleted through generic_delete_inode() */ goto failed; @@ -340,34 +419,21 @@ struct inode *nilfs_new_inode(struct inode *dir, int mode) return ERR_PTR(err); } -void nilfs_free_inode(struct inode *inode) -{ - struct super_block *sb = inode->i_sb; - struct nilfs_sb_info *sbi = NILFS_SB(sb); - - clear_inode(inode); - /* XXX: check error code? Is there any thing I can do? */ - (void) nilfs_ifile_delete_inode(sbi->s_ifile, inode->i_ino); - atomic_dec(&sbi->s_inodes_count); -} - void nilfs_set_inode_flags(struct inode *inode) { unsigned int flags = NILFS_I(inode)->i_flags; inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | S_NOATIME | S_DIRSYNC); - if (flags & NILFS_SYNC_FL) + if (flags & FS_SYNC_FL) inode->i_flags |= S_SYNC; - if (flags & NILFS_APPEND_FL) + if (flags & FS_APPEND_FL) inode->i_flags |= S_APPEND; - if (flags & NILFS_IMMUTABLE_FL) + if (flags & FS_IMMUTABLE_FL) inode->i_flags |= S_IMMUTABLE; -#ifndef NILFS_ATIME_DISABLE - if (flags & NILFS_NOATIME_FL) -#endif + if (flags & FS_NOATIME_FL) inode->i_flags |= S_NOATIME; - if (flags & NILFS_DIRSYNC_FL) + if (flags & FS_DIRSYNC_FL) inode->i_flags |= S_DIRSYNC; mapping_set_gfp_mask(inode->i_mapping, mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS); @@ -380,9 +446,9 @@ int nilfs_read_inode_common(struct inode *inode, int err; inode->i_mode = le16_to_cpu(raw_inode->i_mode); - inode->i_uid = (uid_t)le32_to_cpu(raw_inode->i_uid); - inode->i_gid = (gid_t)le32_to_cpu(raw_inode->i_gid); - inode->i_nlink = le16_to_cpu(raw_inode->i_links_count); + i_uid_write(inode, le32_to_cpu(raw_inode->i_uid)); + i_gid_write(inode, le32_to_cpu(raw_inode->i_gid)); + set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); inode->i_size = le64_to_cpu(raw_inode->i_size); inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime); inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime); @@ -401,7 +467,6 @@ int nilfs_read_inode_common(struct inode *inode, 0 : le32_to_cpu(raw_inode->i_dir_acl); #endif ii->i_dir_start_lookup = 0; - ii->i_cno = 0; inode->i_generation = le32_to_cpu(raw_inode->i_generation); if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || @@ -415,21 +480,21 @@ int nilfs_read_inode_common(struct inode *inode, return 0; } -static int __nilfs_read_inode(struct super_block *sb, unsigned long ino, +static int __nilfs_read_inode(struct super_block *sb, + struct nilfs_root *root, unsigned long ino, struct inode *inode) { - struct nilfs_sb_info *sbi = NILFS_SB(sb); - struct inode *dat = nilfs_dat_inode(sbi->s_nilfs); + struct the_nilfs *nilfs = sb->s_fs_info; struct buffer_head *bh; struct nilfs_inode *raw_inode; int err; - down_read(&NILFS_MDT(dat)->mi_sem); /* XXX */ - err = nilfs_ifile_get_inode_block(sbi->s_ifile, ino, &bh); + down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); + err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh); if (unlikely(err)) goto bad_inode; - raw_inode = nilfs_ifile_map_inode(sbi->s_ifile, ino, bh); + raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh); err = nilfs_read_inode_common(inode, raw_inode); if (err) @@ -450,35 +515,112 @@ static int __nilfs_read_inode(struct super_block *sb, unsigned long ino, inode->i_op = &nilfs_special_inode_operations; init_special_inode( inode, inode->i_mode, - new_decode_dev(le64_to_cpu(raw_inode->i_device_code))); + huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); } - nilfs_ifile_unmap_inode(sbi->s_ifile, ino, bh); + nilfs_ifile_unmap_inode(root->ifile, ino, bh); brelse(bh); - up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */ + up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); nilfs_set_inode_flags(inode); return 0; failed_unmap: - nilfs_ifile_unmap_inode(sbi->s_ifile, ino, bh); + nilfs_ifile_unmap_inode(root->ifile, ino, bh); brelse(bh); bad_inode: - up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */ + up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); return err; } -struct inode *nilfs_iget(struct super_block *sb, unsigned long ino) +static int nilfs_iget_test(struct inode *inode, void *opaque) +{ + struct nilfs_iget_args *args = opaque; + struct nilfs_inode_info *ii; + + if (args->ino != inode->i_ino || args->root != NILFS_I(inode)->i_root) + return 0; + + ii = NILFS_I(inode); + if (!test_bit(NILFS_I_GCINODE, &ii->i_state)) + return !args->for_gc; + + return args->for_gc && args->cno == ii->i_cno; +} + +static int nilfs_iget_set(struct inode *inode, void *opaque) +{ + struct nilfs_iget_args *args = opaque; + + inode->i_ino = args->ino; + if (args->for_gc) { + NILFS_I(inode)->i_state = 1 << NILFS_I_GCINODE; + NILFS_I(inode)->i_cno = args->cno; + NILFS_I(inode)->i_root = NULL; + } else { + if (args->root && args->ino == NILFS_ROOT_INO) + nilfs_get_root(args->root); + NILFS_I(inode)->i_root = args->root; + } + return 0; +} + +struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root, + unsigned long ino) +{ + struct nilfs_iget_args args = { + .ino = ino, .root = root, .cno = 0, .for_gc = 0 + }; + + return ilookup5(sb, ino, nilfs_iget_test, &args); +} + +struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root, + unsigned long ino) +{ + struct nilfs_iget_args args = { + .ino = ino, .root = root, .cno = 0, .for_gc = 0 + }; + + return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); +} + +struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root, + unsigned long ino) { struct inode *inode; int err; - inode = iget_locked(sb, ino); + inode = nilfs_iget_locked(sb, root, ino); if (unlikely(!inode)) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; - err = __nilfs_read_inode(sb, ino, inode); + err = __nilfs_read_inode(sb, root, ino, inode); + if (unlikely(err)) { + iget_failed(inode); + return ERR_PTR(err); + } + unlock_new_inode(inode); + return inode; +} + +struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino, + __u64 cno) +{ + struct nilfs_iget_args args = { + .ino = ino, .root = NULL, .cno = cno, .for_gc = 1 + }; + struct inode *inode; + int err; + + inode = iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); + if (unlikely(!inode)) + return ERR_PTR(-ENOMEM); + if (!(inode->i_state & I_NEW)) + return inode; + + err = nilfs_init_gcinode(inode); if (unlikely(err)) { iget_failed(inode); return ERR_PTR(err); @@ -493,8 +635,8 @@ void nilfs_write_inode_common(struct inode *inode, struct nilfs_inode_info *ii = NILFS_I(inode); raw_inode->i_mode = cpu_to_le16(inode->i_mode); - raw_inode->i_uid = cpu_to_le32(inode->i_uid); - raw_inode->i_gid = cpu_to_le32(inode->i_gid); + raw_inode->i_uid = cpu_to_le32(i_uid_read(inode)); + raw_inode->i_gid = cpu_to_le32(i_gid_read(inode)); raw_inode->i_links_count = cpu_to_le16(inode->i_nlink); raw_inode->i_size = cpu_to_le64(inode->i_size); raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); @@ -506,11 +648,21 @@ void nilfs_write_inode_common(struct inode *inode, raw_inode->i_flags = cpu_to_le32(ii->i_flags); raw_inode->i_generation = cpu_to_le32(inode->i_generation); + if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) { + struct the_nilfs *nilfs = inode->i_sb->s_fs_info; + + /* zero-fill unused portion in the case of super root block */ + raw_inode->i_xattr = 0; + raw_inode->i_pad = 0; + memset((void *)raw_inode + sizeof(*raw_inode), 0, + nilfs->ns_inode_size - sizeof(*raw_inode)); + } + if (has_bmap) nilfs_bmap_write(ii->i_bmap, raw_inode); else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) raw_inode->i_device_code = - cpu_to_le64(new_encode_dev(inode->i_rdev)); + cpu_to_le64(huge_encode_dev(inode->i_rdev)); /* When extending inode, nilfs->ns_inode_size should be checked for substitutions of appended fields */ } @@ -519,21 +671,20 @@ void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh) { ino_t ino = inode->i_ino; struct nilfs_inode_info *ii = NILFS_I(inode); - struct super_block *sb = inode->i_sb; - struct nilfs_sb_info *sbi = NILFS_SB(sb); + struct inode *ifile = ii->i_root->ifile; struct nilfs_inode *raw_inode; - raw_inode = nilfs_ifile_map_inode(sbi->s_ifile, ino, ibh); + raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh); if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state)) - memset(raw_inode, 0, NILFS_MDT(sbi->s_ifile)->mi_entry_size); + memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size); set_bit(NILFS_I_INODE_DIRTY, &ii->i_state); nilfs_write_inode_common(inode, raw_inode, 0); /* XXX: call with has_bmap = 0 is a workaround to avoid deadlock of bmap. This delays update of i_bmap to just before writing */ - nilfs_ifile_unmap_inode(sbi->s_ifile, ino, ibh); + nilfs_ifile_unmap_inode(ifile, ino, ibh); } #define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */ @@ -546,7 +697,7 @@ static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, if (!test_bit(NILFS_I_BMAP, &ii->i_state)) return; - repeat: +repeat: ret = nilfs_bmap_last_key(ii->i_bmap, &b); if (ret == -ENOENT) return; @@ -563,14 +714,10 @@ static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, nilfs_bmap_truncate(ii->i_bmap, b) == 0)) goto repeat; - failed: - if (ret == -EINVAL) - nilfs_error(ii->vfs_inode.i_sb, __func__, - "bmap is broken (ino=%lu)", ii->vfs_inode.i_ino); - else - nilfs_warning(ii->vfs_inode.i_sb, __func__, - "failed to truncate bmap (ino=%lu, err=%d)", - ii->vfs_inode.i_ino, ret); +failed: + nilfs_warning(ii->vfs_inode.i_sb, __func__, + "failed to truncate bmap (ino=%lu, err=%d)", + ii->vfs_inode.i_ino, ret); } void nilfs_truncate(struct inode *inode) @@ -599,33 +746,64 @@ void nilfs_truncate(struct inode *inode) nilfs_set_transaction_flag(NILFS_TI_SYNC); nilfs_mark_inode_dirty(inode); - nilfs_set_file_dirty(NILFS_SB(sb), inode, 0); + nilfs_set_file_dirty(inode, 0); nilfs_transaction_commit(sb); /* May construct a logical segment and may fail in sync mode. But truncate has no return value. */ } -void nilfs_delete_inode(struct inode *inode) +static void nilfs_clear_inode(struct inode *inode) +{ + struct nilfs_inode_info *ii = NILFS_I(inode); + struct nilfs_mdt_info *mdi = NILFS_MDT(inode); + + /* + * Free resources allocated in nilfs_read_inode(), here. + */ + BUG_ON(!list_empty(&ii->i_dirty)); + brelse(ii->i_bh); + ii->i_bh = NULL; + + if (mdi && mdi->mi_palloc_cache) + nilfs_palloc_destroy_cache(inode); + + if (test_bit(NILFS_I_BMAP, &ii->i_state)) + nilfs_bmap_clear(ii->i_bmap); + + nilfs_btnode_cache_clear(&ii->i_btnode_cache); + + if (ii->i_root && inode->i_ino == NILFS_ROOT_INO) + nilfs_put_root(ii->i_root); +} + +void nilfs_evict_inode(struct inode *inode) { struct nilfs_transaction_info ti; struct super_block *sb = inode->i_sb; struct nilfs_inode_info *ii = NILFS_I(inode); + int ret; - if (unlikely(is_bad_inode(inode))) { - if (inode->i_data.nrpages) - truncate_inode_pages(&inode->i_data, 0); + if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) { + truncate_inode_pages_final(&inode->i_data); clear_inode(inode); + nilfs_clear_inode(inode); return; } nilfs_transaction_begin(sb, &ti, 0); /* never fails */ - if (inode->i_data.nrpages) - truncate_inode_pages(&inode->i_data, 0); + truncate_inode_pages_final(&inode->i_data); + /* TODO: some of the following operations may fail. */ nilfs_truncate_bmap(ii, 0); nilfs_mark_inode_dirty(inode); - nilfs_free_inode(inode); - /* nilfs_free_inode() marks inode buffer dirty */ + clear_inode(inode); + + ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino); + if (!ret) + atomic64_dec(&ii->i_root->inodes_count); + + nilfs_clear_inode(inode); + if (IS_SYNC(inode)) nilfs_set_transaction_flag(NILFS_TI_SYNC); nilfs_transaction_commit(sb); @@ -647,31 +825,54 @@ int nilfs_setattr(struct dentry *dentry, struct iattr *iattr) err = nilfs_transaction_begin(sb, &ti, 0); if (unlikely(err)) return err; - err = inode_setattr(inode, iattr); - if (!err && (iattr->ia_valid & ATTR_MODE)) + + if ((iattr->ia_valid & ATTR_SIZE) && + iattr->ia_size != i_size_read(inode)) { + inode_dio_wait(inode); + truncate_setsize(inode, iattr->ia_size); + nilfs_truncate(inode); + } + + setattr_copy(inode, iattr); + mark_inode_dirty(inode); + + if (iattr->ia_valid & ATTR_MODE) { err = nilfs_acl_chmod(inode); - if (likely(!err)) - err = nilfs_transaction_commit(sb); - else - nilfs_transaction_abort(sb); + if (unlikely(err)) + goto out_err; + } + + return nilfs_transaction_commit(sb); +out_err: + nilfs_transaction_abort(sb); return err; } -int nilfs_load_inode_block(struct nilfs_sb_info *sbi, struct inode *inode, - struct buffer_head **pbh) +int nilfs_permission(struct inode *inode, int mask) +{ + struct nilfs_root *root = NILFS_I(inode)->i_root; + if ((mask & MAY_WRITE) && root && + root->cno != NILFS_CPTREE_CURRENT_CNO) + return -EROFS; /* snapshot is not writable */ + + return generic_permission(inode, mask); +} + +int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh) { + struct the_nilfs *nilfs = inode->i_sb->s_fs_info; struct nilfs_inode_info *ii = NILFS_I(inode); int err; - spin_lock(&sbi->s_inode_lock); + spin_lock(&nilfs->ns_inode_lock); if (ii->i_bh == NULL) { - spin_unlock(&sbi->s_inode_lock); - err = nilfs_ifile_get_inode_block(sbi->s_ifile, inode->i_ino, - pbh); + spin_unlock(&nilfs->ns_inode_lock); + err = nilfs_ifile_get_inode_block(ii->i_root->ifile, + inode->i_ino, pbh); if (unlikely(err)) return err; - spin_lock(&sbi->s_inode_lock); + spin_lock(&nilfs->ns_inode_lock); if (ii->i_bh == NULL) ii->i_bh = *pbh; else { @@ -682,36 +883,36 @@ int nilfs_load_inode_block(struct nilfs_sb_info *sbi, struct inode *inode, *pbh = ii->i_bh; get_bh(*pbh); - spin_unlock(&sbi->s_inode_lock); + spin_unlock(&nilfs->ns_inode_lock); return 0; } int nilfs_inode_dirty(struct inode *inode) { struct nilfs_inode_info *ii = NILFS_I(inode); - struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb); + struct the_nilfs *nilfs = inode->i_sb->s_fs_info; int ret = 0; if (!list_empty(&ii->i_dirty)) { - spin_lock(&sbi->s_inode_lock); + spin_lock(&nilfs->ns_inode_lock); ret = test_bit(NILFS_I_DIRTY, &ii->i_state) || test_bit(NILFS_I_BUSY, &ii->i_state); - spin_unlock(&sbi->s_inode_lock); + spin_unlock(&nilfs->ns_inode_lock); } return ret; } -int nilfs_set_file_dirty(struct nilfs_sb_info *sbi, struct inode *inode, - unsigned nr_dirty) +int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty) { struct nilfs_inode_info *ii = NILFS_I(inode); + struct the_nilfs *nilfs = inode->i_sb->s_fs_info; - atomic_add(nr_dirty, &sbi->s_nilfs->ns_ndirtyblks); + atomic_add(nr_dirty, &nilfs->ns_ndirtyblks); if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state)) return 0; - spin_lock(&sbi->s_inode_lock); + spin_lock(&nilfs->ns_inode_lock); if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && !test_bit(NILFS_I_BUSY, &ii->i_state)) { /* Because this routine may race with nilfs_dispose_list(), @@ -719,36 +920,34 @@ int nilfs_set_file_dirty(struct nilfs_sb_info *sbi, struct inode *inode, if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) { /* This will happen when somebody is freeing this inode. */ - nilfs_warning(sbi->s_super, __func__, + nilfs_warning(inode->i_sb, __func__, "cannot get inode (ino=%lu)\n", inode->i_ino); - spin_unlock(&sbi->s_inode_lock); + spin_unlock(&nilfs->ns_inode_lock); return -EINVAL; /* NILFS_I_DIRTY may remain for freeing inode */ } - list_del(&ii->i_dirty); - list_add_tail(&ii->i_dirty, &sbi->s_dirty_files); + list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files); set_bit(NILFS_I_QUEUED, &ii->i_state); } - spin_unlock(&sbi->s_inode_lock); + spin_unlock(&nilfs->ns_inode_lock); return 0; } int nilfs_mark_inode_dirty(struct inode *inode) { - struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb); struct buffer_head *ibh; int err; - err = nilfs_load_inode_block(sbi, inode, &ibh); + err = nilfs_load_inode_block(inode, &ibh); if (unlikely(err)) { nilfs_warning(inode->i_sb, __func__, "failed to reget inode block.\n"); return err; } nilfs_update_inode(inode, ibh); - nilfs_mdt_mark_buffer_dirty(ibh); - nilfs_mdt_mark_dirty(sbi->s_ifile); + mark_buffer_dirty(ibh); + nilfs_mdt_mark_dirty(NILFS_I(inode)->i_root->ifile); brelse(ibh); return 0; } @@ -763,9 +962,10 @@ int nilfs_mark_inode_dirty(struct inode *inode) * construction. This function can be called both as a single operation * and as a part of indivisible file operations. */ -void nilfs_dirty_inode(struct inode *inode) +void nilfs_dirty_inode(struct inode *inode, int flags) { struct nilfs_transaction_info ti; + struct nilfs_mdt_info *mdi = NILFS_MDT(inode); if (is_bad_inode(inode)) { nilfs_warning(inode->i_sb, __func__, @@ -773,7 +973,142 @@ void nilfs_dirty_inode(struct inode *inode) dump_stack(); return; } + if (mdi) { + nilfs_mdt_mark_dirty(inode); + return; + } nilfs_transaction_begin(inode->i_sb, &ti, 0); nilfs_mark_inode_dirty(inode); nilfs_transaction_commit(inode->i_sb); /* never fails */ } + +int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, + __u64 start, __u64 len) +{ + struct the_nilfs *nilfs = inode->i_sb->s_fs_info; + __u64 logical = 0, phys = 0, size = 0; + __u32 flags = 0; + loff_t isize; + sector_t blkoff, end_blkoff; + sector_t delalloc_blkoff; + unsigned long delalloc_blklen; + unsigned int blkbits = inode->i_blkbits; + int ret, n; + + ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); + if (ret) + return ret; + + mutex_lock(&inode->i_mutex); + + isize = i_size_read(inode); + + blkoff = start >> blkbits; + end_blkoff = (start + len - 1) >> blkbits; + + delalloc_blklen = nilfs_find_uncommitted_extent(inode, blkoff, + &delalloc_blkoff); + + do { + __u64 blkphy; + unsigned int maxblocks; + + if (delalloc_blklen && blkoff == delalloc_blkoff) { + if (size) { + /* End of the current extent */ + ret = fiemap_fill_next_extent( + fieinfo, logical, phys, size, flags); + if (ret) + break; + } + if (blkoff > end_blkoff) + break; + + flags = FIEMAP_EXTENT_MERGED | FIEMAP_EXTENT_DELALLOC; + logical = blkoff << blkbits; + phys = 0; + size = delalloc_blklen << blkbits; + + blkoff = delalloc_blkoff + delalloc_blklen; + delalloc_blklen = nilfs_find_uncommitted_extent( + inode, blkoff, &delalloc_blkoff); + continue; + } + + /* + * Limit the number of blocks that we look up so as + * not to get into the next delayed allocation extent. + */ + maxblocks = INT_MAX; + if (delalloc_blklen) + maxblocks = min_t(sector_t, delalloc_blkoff - blkoff, + maxblocks); + blkphy = 0; + + down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); + n = nilfs_bmap_lookup_contig( + NILFS_I(inode)->i_bmap, blkoff, &blkphy, maxblocks); + up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); + + if (n < 0) { + int past_eof; + + if (unlikely(n != -ENOENT)) + break; /* error */ + + /* HOLE */ + blkoff++; + past_eof = ((blkoff << blkbits) >= isize); + + if (size) { + /* End of the current extent */ + + if (past_eof) + flags |= FIEMAP_EXTENT_LAST; + + ret = fiemap_fill_next_extent( + fieinfo, logical, phys, size, flags); + if (ret) + break; + size = 0; + } + if (blkoff > end_blkoff || past_eof) + break; + } else { + if (size) { + if (phys && blkphy << blkbits == phys + size) { + /* The current extent goes on */ + size += n << blkbits; + } else { + /* Terminate the current extent */ + ret = fiemap_fill_next_extent( + fieinfo, logical, phys, size, + flags); + if (ret || blkoff > end_blkoff) + break; + + /* Start another extent */ + flags = FIEMAP_EXTENT_MERGED; + logical = blkoff << blkbits; + phys = blkphy << blkbits; + size = n << blkbits; + } + } else { + /* Start a new extent */ + flags = FIEMAP_EXTENT_MERGED; + logical = blkoff << blkbits; + phys = blkphy << blkbits; + size = n << blkbits; + } + blkoff += n; + } + cond_resched(); + } while (true); + + /* If ret is 1 then we just hit the end of the extent array */ + if (ret == 1) + ret = 0; + + mutex_unlock(&inode->i_mutex); + return ret; +} |