[Devel] [PATCH RHEL7 COMMIT] ve/fs/fcntl: allow pipes with O_DIRECT regardless "odirect_enable" status

[Konstantin Khorenko]

The commit is pushed to "branch-rh7-3.10.0-229.7.2.vz7.9.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-229.7.2.vz7.9.20
------>
commit e040b001d2f532d17e2121bad184f987e84561a6
Author: Stanislav Kinsburskiy <skinsbursky at virtuozzo.com>
Date:   Thu Jan 14 17:46:03 2016 +0400

    ve/fs/fcntl: allow pipes with O_DIRECT regardless "odirect_enable" status
    
    This flag represents packetized mode for pipes, which only changes how pipe
    holds packets, and shouldn't be affected by "odirect_enable" toggle.
    
    Signed-off-by: Stanislav Kinsburskiy <skinsbursky at virtuozzo.com>
    Reviewed-by: Kirill Tkhai <ktkhai at virtuozzo.com>
---
 fs/fcntl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/fcntl.c b/fs/fcntl.c
index cfa349c..1df1ffa 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -70,7 +70,7 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
 	struct inode * inode = file_inode(filp);
 	int error = 0;
 
-	if (!may_use_odirect())
+	if (!S_ISFIFO(filp->f_mode) && !may_use_odirect(filp))
 		arg &= ~O_DIRECT;
 	if (ve_fsync_behavior() == FSYNC_NEVER)
 		arg &= ~O_SYNC;