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authorJaegeuk Kim <jaegeuk.kim@samsung.com>2013-06-07 17:08:23 +0400
committerJaegeuk Kim <jaegeuk.kim@samsung.com>2013-06-12 03:18:35 +0400
commit699489bbbea4fc3b9b735d69941cf4fca91ce1d5 (patch)
tree4b3d474252dfc93f0f4b55145d6d7193d0cbcd13 /fs/f2fs/dir.c
parent2d4d9fb591fe83d9f0559afaa9736ebc8edad0aa (diff)
downloadlinux-699489bbbea4fc3b9b735d69941cf4fca91ce1d5.tar.xz
f2fs: sync dir->i_size with its block allocation
If new dentry block is allocated and its i_size is updated, we should update its inode block together in order to sync i_size and its block allocation. Otherwise, we can loose additional dentry block due to the unconsistent i_size. Errorneous Scenario ------------------- In the recovery routine, - recovery_dentry | - __f2fs_add_link | | - get_new_data_page | | | - i_size_write(new_i_size) | | | - mark_inode_dirty_sync(dir) | | - update_parent_metadata | | | - mark_inode_dirty(dir) | - write_checkpoint - sync_dirty_dir_inodes - filemap_flush(dentry_blocks) - f2fs_write_data_page - skip to write the last dentry block due to index < i_size In the above flow, new_i_size is not updated to its inode block so that the last dentry block will be lost accordingly. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/dir.c')
-rw-r--r--fs/f2fs/dir.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index eaea5b50d9c1..69ca049b5168 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -370,22 +370,20 @@ error:
static void update_parent_metadata(struct inode *dir, struct inode *inode,
unsigned int current_depth)
{
- bool need_dir_update = false;
-
if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) {
if (S_ISDIR(inode->i_mode)) {
inc_nlink(dir);
- need_dir_update = true;
+ set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
}
clear_inode_flag(F2FS_I(inode), FI_NEW_INODE);
}
dir->i_mtime = dir->i_ctime = CURRENT_TIME;
if (F2FS_I(dir)->i_current_depth != current_depth) {
F2FS_I(dir)->i_current_depth = current_depth;
- need_dir_update = true;
+ set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
}
- if (need_dir_update)
+ if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR))
update_inode_page(dir);
else
mark_inode_dirty(dir);
@@ -502,6 +500,7 @@ add_dentry:
update_parent_metadata(dir, inode, current_depth);
fail:
+ clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
kunmap(dentry_page);
f2fs_put_page(dentry_page, 1);
return err;