From b2c0829912493df596706a1a036c67beb1bd6ff5 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Mon, 30 Jun 2014 18:09:55 +0900 Subject: [PATCH] f2fs: do checkpoint for the renamed inode If an inode is renamed, it should be registered as file_lost_pino to conduct checkpoint at f2fs_sync_file. Otherwise, the inode cannot be recovered due to no dent_mark in the following scenario. Note that, this scenario is from xfstests/322. 1. create "a" 2. fsync "a" 3. rename "a" to "b" 4. fsync "b" 5. Sudden power-cut After recovery is done, "b" should be seen. However, the result shows "a", since the recovery procedure does not enter recover_dentry due to no dent_mark. The reason is like below. - The nid of "a" is checkpointed during #2, f2fs_sync_file. - The inode page for "b" produced by #3 is written without dent_mark by sync_node_pages. So, this patch fixes this bug by assinging file_lost_pino to the "a"'s inode. If the pino is lost, f2fs_sync_file conducts checkpoint, and then recovers the latest pino and its dentry information for further recovery. Signed-off-by: Jaegeuk Kim --- fs/f2fs/namei.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index aa3ddb228f98..a6bdddc33ce2 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -417,9 +417,6 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, } f2fs_set_link(new_dir, new_entry, new_page, old_inode); - down_write(&F2FS_I(old_inode)->i_sem); - F2FS_I(old_inode)->i_pino = new_dir->i_ino; - up_write(&F2FS_I(old_inode)->i_sem); new_inode->i_ctime = CURRENT_TIME; down_write(&F2FS_I(new_inode)->i_sem); @@ -448,6 +445,10 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, } } + down_write(&F2FS_I(old_inode)->i_sem); + file_lost_pino(old_inode); + up_write(&F2FS_I(old_inode)->i_sem); + old_inode->i_ctime = CURRENT_TIME; mark_inode_dirty(old_inode); @@ -457,9 +458,6 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, if (old_dir != new_dir) { f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); - down_write(&F2FS_I(old_inode)->i_sem); - F2FS_I(old_inode)->i_pino = new_dir->i_ino; - up_write(&F2FS_I(old_inode)->i_sem); update_inode_page(old_inode); } else { kunmap(old_dir_page); -- 2.30.2