4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Steve French <smfre...@gmail.com>
commit 1013e760d10e614dc10b5624ce9fc41563ba2e65 upstream.
Signed-off-by: Steve French <smfre...@gmail.com>
Reviewed-by: Ronnie Sahlberg <lsahl...@redhat.com>
Reviewed-by: Pavel Shilovsky <pshi...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
fs/cifs/file.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -224,6 +224,13 @@ cifs_nt_open(char *full_path, struct ino
if (backup_cred(cifs_sb))
create_options |= CREATE_OPEN_BACKUP_INTENT;
+ /* O_SYNC also has bit for O_DSYNC so following check picks up either */
+ if (f_flags & O_SYNC)
+ create_options |= CREATE_WRITE_THROUGH;
+
+ if (f_flags & O_DIRECT)
+ create_options |= CREATE_NO_BUFFER;
+
oparms.tcon = tcon;
oparms.cifs_sb = cifs_sb;
oparms.desired_access = desired_access;
