From: Ronnie Sahlberg <lsahlber@redhat.com>
Date: Mon, 12 Sep 2022 13:04:46 +1000
Subject: [PATCH] cifs: revalidate mapping when doing direct writes
Git-commit: 7500a99281dfed2d4a84771c933bcb9e17af279b
References: bsc#1193629
Patch-mainline: v6.0-rc6
Kernel bugzilla: 216301
When doing direct writes we need to also invalidate the mapping in case
we have a cached copy of the affected page(s) in memory or else
subsequent reads of the data might return the old/stale content
before we wrote an update to the server.
Cc: stable@vger.kernel.org
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Paulo Alcantara <palcantara@suse.de>
---
fs/cifs/file.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index fa738adc031f..6f38b134a346 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -3575,6 +3575,9 @@ static ssize_t __cifs_writev(
ssize_t cifs_direct_writev(struct kiocb *iocb, struct iov_iter *from)
{
+ struct file *file = iocb->ki_filp;
+
+ cifs_revalidate_mapping(file->f_inode);
return __cifs_writev(iocb, from, true);
}
--
2.38.0