From: Xiao Yang <yangx.jy@cn.fujitsu.com>
To: <linux-ext4@vger.kernel.org>
Cc: <darrick.wong@oracle.com>, <ira.weiny@intel.com>, <tytso@mit.edu>,
<jack@suse.cz>, Xiao Yang <yangx.jy@cn.fujitsu.com>
Subject: [PATCH v2] ext4: Disallow modifying DAX inode flag if inline_data has been set
Date: Fri, 28 Aug 2020 16:43:30 +0800 [thread overview]
Message-ID: <20200828084330.15776-1-yangx.jy@cn.fujitsu.com> (raw)
inline_data is mutually exclusive to DAX so enabling both of them triggers
the following issue:
------------------------------------------
# mkfs.ext4 -F -O inline_data /dev/pmem1
...
# mount /dev/pmem1 /mnt
# echo 'test' >/mnt/file
# lsattr -l /mnt/file
/mnt/file Inline_Data
# xfs_io -c "chattr +x" /mnt/file
# xfs_io -c "lsattr -v" /mnt/file
[dax] /mnt/file
# umount /mnt
# mount /dev/pmem1 /mnt
# cat /mnt/file
cat: /mnt/file: Numerical result out of range
------------------------------------------
Fixes: b383a73f2b83 ("fs/ext4: Introduce DAX inode flag")
Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Reviewed-by: Jan Kara <jack@suse.cz>
---
fs/ext4/ext4.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 523e00d7b392..69187b6205b2 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -492,7 +492,7 @@ struct flex_groups {
/* Flags which are mutually exclusive to DAX */
#define EXT4_DAX_MUT_EXCL (EXT4_VERITY_FL | EXT4_ENCRYPT_FL |\
- EXT4_JOURNAL_DATA_FL)
+ EXT4_JOURNAL_DATA_FL | EXT4_INLINE_DATA_FL)
/* Mask out flags that are inappropriate for the given type of inode. */
static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags)
--
2.25.1
next reply other threads:[~2020-08-28 9:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-28 8:43 Xiao Yang [this message]
2020-08-28 17:57 ` [PATCH v2] ext4: Disallow modifying DAX inode flag if inline_data has been set Ira Weiny
2020-08-29 7:27 ` Andreas Dilger
2020-09-17 3:29 ` Xiao Yang
2020-10-03 4:13 ` Theodore Y. Ts'o
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