And one more small set of structures for the updated transform header.
See MS-SMB2 2.2.42.1 and 2.2.42.2
On Sun, Mar 15, 2020 at 5:50 PM Steve French <smfrench@xxxxxxxxx> wrote:
>
> Some compression related flags I noticed were added in the latest MS-SMB2
>
>
>
> --
> Thanks,
>
> Steve
--
Thanks,
Steve
From eeb672fc5e0ec07d355a0d782a20f9cd28f34be7 Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@xxxxxxxxxxxxx>
Date: Sun, 15 Mar 2020 18:04:13 -0500
Subject: [PATCH] SMB3: Additional compression structures
New transform header structures. See recent updates
to MS-SMB2 adding section 2.2.42.1 and 2.2.42.2
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
---
fs/cifs/smb2pdu.h | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 4a7d154fffae..8b8fbbc464c7 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -137,6 +137,21 @@ struct smb2_transform_hdr {
__u64 SessionId;
} __packed;
+/* See MS-SMB2 2.2.42.1 */
+struct compression_playload_header {
+ __le16 AlgorithmId;
+ __le16 Reserved;
+ __le32 Length;
+} __packed;
+
+/* See MS-SMB2 2.2.42.2 */
+struct compression_pattern_payload_v1 {
+ __le16 Pattern;
+ __le16 Reserved1;
+ __le16 Reserved2;
+ __le32 Repititions;
+} __packed;
+
/*
* SMB2 flag definitions
*/
@@ -1186,7 +1201,7 @@ struct smb2_write_req {
__le64 Offset;
__u64 PersistentFileId; /* opaque endianness */
__u64 VolatileFileId; /* opaque endianness */
- __le32 Channel; /* Reserved MBZ */
+ __le32 Channel; /* MBZ unless SMB3.02 or later */
__le32 RemainingBytes;
__le16 WriteChannelInfoOffset;
__le16 WriteChannelInfoLength;
--
2.20.1
