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authorJaegeuk Kim <jaegeuk.kim@samsung.com>2012-12-10 17:52:48 +0900
committerJaegeuk Kim <jaegeuk.kim@samsung.com>2012-12-11 13:43:45 +0900
commit6666e6aa9f36b2bfd6b30072c07b34f2a24becf1 (patch)
tree29a4b75710c8dc3e8df25617aae0b6e51359f1f3 /fs/f2fs/dir.c
parent3cd8a23948b29301f8f67b8d70c5c18fabbc05e1 (diff)
downloadop-kernel-dev-6666e6aa9f36b2bfd6b30072c07b34f2a24becf1.zip
op-kernel-dev-6666e6aa9f36b2bfd6b30072c07b34f2a24becf1.tar.gz
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.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index d900c08..b4e24f3 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);
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