[RFC 7/8] ext4: Enable FMODE_CAN_ATOMIC_WRITE in open for direct-io

Ritesh Harjani (IBM)
2024-03-02T07:42:53Z

For inodes which has EXT4_INODE_ATOMIC_WRITE flag set, enable
FMODE_CAN_ATOMIC_WRITE mode in ext4 file open method for file opened
with O_DIRECT.

Co-developed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
---
fs/ext4/file.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 8e309a9a0bd6..800fd79e2738 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -913,6 +913,10 @@ static int ext4_file_open(struct inode *inode, struct file *filp)
return ret;
}

+ if (ext4_test_inode_flag(inode, EXT4_INODE_ATOMIC_WRITE) &&
+ (filp->f_flags & O_DIRECT))
+ filp->f_mode |= FMODE_CAN_ATOMIC_WRITE;
+
filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC |
FMODE_DIO_PARALLEL_WRITE;
return dquot_file_open(inode, filp);
--
2.43.0