This is a note to let you know that I've just added the patch titled
SMB3: Don't ignore O_SYNC/O_DSYNC and O_DIRECT flags
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
smb3-don-t-ignore-o_sync-o_dsync-and-o_direct-flags.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1013e760d10e614dc10b5624ce9fc41563ba2e65 Mon Sep 17 00:00:00 2001
From: Steve French <smfrench@xxxxxxxxx>
Date: Fri, 22 Sep 2017 01:40:27 -0500
Subject: SMB3: Don't ignore O_SYNC/O_DSYNC and O_DIRECT flags
From: Steve French <smfrench@xxxxxxxxx>
commit 1013e760d10e614dc10b5624ce9fc41563ba2e65 upstream.
Signed-off-by: Steve French <smfrench@xxxxxxxxx>
Reviewed-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
Reviewed-by: Pavel Shilovsky <pshilov@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;
Patches currently in stable-queue which might be from smfrench@xxxxxxxxx are
queue-4.9/cifs-release-cifs-root_cred-after-exit_cifs.patch
queue-4.9/smb3-warn-user-if-trying-to-sign-connection-that-authenticated-as-guest.patch
queue-4.9/smb3-don-t-ignore-o_sync-o_dsync-and-o_direct-flags.patch
queue-4.9/fix-smb3.1.1-guest-authentication-to-samba.patch
queue-4.9/cifs-release-auth_key.response-for-reconnect.patch
queue-4.9/smb-validate-negotiate-to-protect-against-downgrade-even-if-signing-off.patch