Commit 7500a992 authored by Ronnie Sahlberg's avatar Ronnie Sahlberg Committed by Steve French
Browse files

cifs: revalidate mapping when doing direct writes 



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: default avatarPaulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: default avatarRonnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent 80e78fcc

fs/cifs/file.c

+3 −0
Original line number Diff line number Diff line
@@ -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);

}