From 6666e6aa9f36b2bfd6b30072c07b34f2a24becf1 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Mon, 10 Dec 2012 17:52:48 +0900 Subject: 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 --- fs/f2fs/dir.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'fs/f2fs/dir.c') 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); -- cgit v1.1