From: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Date: Tue, 5 Nov 2024 00:22:59 +0000 (-0800)
Subject: ext4: Support setting FMODE_CAN_ATOMIC_WRITE
X-Git-Tag: v6.13-rc1~220^2~1^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b7987a7d69a4a17b7f334f5c100d6729ebcc2ccb;p=thirdparty%2Fkernel%2Flinux.git

ext4: Support setting FMODE_CAN_ATOMIC_WRITE

FS needs to add the fmode capability in order to support atomic writes
during file open (refer kiocb_set_rw_flags()). Set this capability on
a regular file if ext4 can do atomic write.

Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
---

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index a7b9b9751a3f1..96d936f5584bd 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -898,6 +898,9 @@ static int ext4_file_open(struct inode *inode, struct file *filp)
 			return ret;
 	}
 
+	if (ext4_inode_can_atomic_write(inode))
+		filp->f_mode |= FMODE_CAN_ATOMIC_WRITE;
+
 	filp->f_mode |= FMODE_NOWAIT | FMODE_CAN_ODIRECT;
 	return dquot_file_open(inode, filp);
 }