We should set noatime bit for quota files, since no one cares about
atime of quota file, and we should set immutalbe bit as well, due to
nobody should write to the file through exported interfaces.
Meanwhile this patch use inode_lock to avoid race condition during
inode->i_flags, f2fs_inode->i_flags update.
Signed-off-by: Chao Yu <[email protected]>
---
v3:
- simply check condition suggested by Jaegeuk.
fs/f2fs/super.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 51812f459581..8eb17cc73941 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -2748,6 +2748,7 @@ static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
{
struct inode *qf_inode;
unsigned long qf_inum;
+ unsigned long qf_flag = F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
int err;
BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
@@ -2763,7 +2764,15 @@ static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
}
/* Don't account quota for quota files to avoid recursion */
+ inode_lock(qf_inode);
qf_inode->i_flags |= S_NOQUOTA;
+
+ if ((F2FS_I(qf_inode)->i_flags & qf_flag) != qf_flag) {
+ F2FS_I(qf_inode)->i_flags |= qf_flag;
+ f2fs_set_inode_flags(qf_inode);
+ }
+ inode_unlock(qf_inode);
+
err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
iput(qf_inode);
return err;
--
2.40.1
Hello:
This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <[email protected]>:
On Sat, 27 May 2023 08:15:39 +0800 you wrote:
> We should set noatime bit for quota files, since no one cares about
> atime of quota file, and we should set immutalbe bit as well, due to
> nobody should write to the file through exported interfaces.
>
> Meanwhile this patch use inode_lock to avoid race condition during
> inode->i_flags, f2fs_inode->i_flags update.
>
> [...]
Here is the summary with links:
- [f2fs-dev,v3] f2fs: fix to set noatime and immutable flag for quota file
https://git.kernel.org/jaegeuk/f2fs/c/cd2a3af38096
You are awesome, thank you!
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