From: Steve French <stfrench@microsoft.com>
Date: Sun, 15 Mar 2020 22:42:41 +0000 (-0500)
Subject: SMB3: Add new compression flags
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2fe4f62de4892b88c16fee7c2832eb37f1d3c4a0;p=linux.git

SMB3: Add new compression flags

Additional compression capabilities can now be negotiated and a
new compression algorithm.  Add the flags for these.

See newly updated MS-SMB2 sections 3.1.4.4.1 and 2.2.3.1.3

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 817bc0531536b..4a7d154fffae6 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -307,11 +307,17 @@ struct smb2_encryption_neg_context {
 #define SMB3_COMPRESS_LZNT1	cpu_to_le16(0x0001)
 #define SMB3_COMPRESS_LZ77	cpu_to_le16(0x0002)
 #define SMB3_COMPRESS_LZ77_HUFF	cpu_to_le16(0x0003)
+/* Pattern scanning algorithm See MS-SMB2 3.1.4.4.1 */
+#define SMB3_COMPRESS_PATTERN	cpu_to_le16(0x0004)
+
+/* Compression Flags */
+#define SMB2_COMPRESSION_CAPABILITIES_FLAG_NONE		cpu_to_le32(0x00000000)
+#define SMB2_COMPRESSION_CAPABILITIES_FLAG_CHAINED	cpu_to_le32(0x00000001)
 
 struct smb2_compression_capabilities_context {
 	__le16	ContextType; /* 3 */
 	__le16  DataLength;
-	__u32	Reserved;
+	__u32	Flags;
 	__le16	CompressionAlgorithmCount;
 	__u16	Padding;
 	__u32	Reserved1;