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author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2012-12-10 17:52:48 +0900 |
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committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2012-12-11 13:43:45 +0900 |
commit | 6666e6aa9f36b2bfd6b30072c07b34f2a24becf1 (patch) | |
tree | 29a4b75710c8dc3e8df25617aae0b6e51359f1f3 /fs/f2fs/dir.c | |
parent | 3cd8a23948b29301f8f67b8d70c5c18fabbc05e1 (diff) | |
download | linux-exynos-6666e6aa9f36b2bfd6b30072c07b34f2a24becf1.tar.gz linux-exynos-6666e6aa9f36b2bfd6b30072c07b34f2a24becf1.tar.bz2 linux-exynos-6666e6aa9f36b2bfd6b30072c07b34f2a24becf1.zip |
f2fs: fix tracking parent inode number
Previously, f2fs didn't track the parent inode number correctly which is stored
in each f2fs_inode. In the case of the following scenario, a bug can be occured.
Let's suppose there are one directory, "/b", and two files, "/a" and "/b/a".
- pino of "/a" is ROOT_INO.
- pino of "/b/a" is DIR_B_INO.
Then,
# sync
: The inode pages of "/a" and "/b/a" contain the parent inode numbers as
ROOT_INO and DIR_B_INO respectively.
# mv /a /b/a
: The parent inode number of "/a" should be changed to DIR_B_INO, but f2fs
didn't do that. Ref. f2fs_set_link().
In order to fix this clearly, I added i_pino in f2fs_inode_info, and whenever
it needs to be changed like in f2fs_add_link() and f2fs_set_link(), it is
updated temporarily in f2fs_inode_info.
And later, f2fs_write_inode() stores the latest information to the inode pages.
For power-off-recovery, f2fs_sync_file() triggers simply f2fs_write_inode().
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/dir.c')
-rw-r--r-- | fs/f2fs/dir.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index d900c088c7c6..b4e24f32b54e 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -256,13 +256,16 @@ void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de, set_page_dirty(page); dir->i_mtime = dir->i_ctime = CURRENT_TIME; mark_inode_dirty(dir); + + /* update parent inode number before releasing dentry page */ + F2FS_I(inode)->i_pino = dir->i_ino; + f2fs_put_page(page, 1); mutex_unlock_op(sbi, DENTRY_OPS); } void init_dent_inode(struct dentry *dentry, struct page *ipage) { - struct inode *dir = dentry->d_parent->d_inode; struct f2fs_node *rn; if (IS_ERR(ipage)) @@ -272,7 +275,6 @@ void init_dent_inode(struct dentry *dentry, struct page *ipage) /* copy dentry info. to this inode page */ rn = (struct f2fs_node *)page_address(ipage); - rn->i.i_pino = cpu_to_le32(dir->i_ino); rn->i.i_namelen = cpu_to_le32(dentry->d_name.len); memcpy(rn->i.i_name, dentry->d_name.name, dentry->d_name.len); set_page_dirty(ipage); @@ -444,7 +446,11 @@ add_dentry: for (i = 0; i < slots; i++) test_and_set_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap); set_page_dirty(dentry_page); + update_parent_metadata(dir, inode, current_depth); + + /* update parent inode number before releasing dentry page */ + F2FS_I(inode)->i_pino = dir->i_ino; fail: kunmap(dentry_page); f2fs_put_page(dentry_page, 1); |