SMB3: Don't ignore O_SYNC/O_DSYNC and O_DIRECT flags

Signed-off-by: Steve French <[email protected]> CC: Stable <[email protected]> Reviewed-by: Ronnie Sahlberg <[email protected]> Reviewed-by: Pavel Shilovsky <[email protected]>
cail · Sep 23, 2017 · 1013e76 · 1013e76
1 parent 6e70e26
commit 1013e76
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
@@ -224,6 +224,13 @@ cifs_nt_open(char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb,
 	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;