6.6-stable review patch. If anyone has any objections, please let me know.
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From: Yeongjin Gil youngjin.gil@samsung.com
[ Upstream commit 8c1b787938fd86bab27a1492fa887408c75fec2b ]
The i_pino in f2fs_inode_info has the previous parent's i_ino when inode was renamed, which may cause f2fs_ioc_start_atomic_write to fail. If file_wrong_pino is true and i_nlink is 1, then to find a valid pino, we should refer to the dentry from inode.
To resolve this issue, let's get parent inode using parent dentry directly.
Fixes: 3db1de0e582c ("f2fs: change the current atomic write way") Reviewed-by: Sungjong Seo sj1557.seo@samsung.com Reviewed-by: Sunmin Jeong s_min.jeong@samsung.com Signed-off-by: Yeongjin Gil youngjin.gil@samsung.com Reviewed-by: Daeho Jeong daehojeong@google.com Reviewed-by: Chao Yu chao@kernel.org Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/f2fs/file.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 8c4c5c6c1ac64..a0d2e180f0ed7 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -2097,7 +2097,6 @@ static int f2fs_ioc_start_atomic_write(struct file *filp, bool truncate) struct mnt_idmap *idmap = file_mnt_idmap(filp); struct f2fs_inode_info *fi = F2FS_I(inode); struct f2fs_sb_info *sbi = F2FS_I_SB(inode); - struct inode *pinode; loff_t isize; int ret;
@@ -2146,15 +2145,10 @@ static int f2fs_ioc_start_atomic_write(struct file *filp, bool truncate) /* Check if the inode already has a COW inode */ if (fi->cow_inode == NULL) { /* Create a COW inode for atomic write */ - pinode = f2fs_iget(inode->i_sb, fi->i_pino); - if (IS_ERR(pinode)) { - f2fs_up_write(&fi->i_gc_rwsem[WRITE]); - ret = PTR_ERR(pinode); - goto out; - } + struct dentry *dentry = file_dentry(filp); + struct inode *dir = d_inode(dentry->d_parent);
- ret = f2fs_get_tmpfile(idmap, pinode, &fi->cow_inode); - iput(pinode); + ret = f2fs_get_tmpfile(idmap, dir, &fi->cow_inode); if (ret) { f2fs_up_write(&fi->i_gc_rwsem[WRITE]); goto out;