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@microsoft.com>
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>

diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 4a7d154..8b9f546 100644 (file)
--- 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  Repetitions;
+} __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;