Some compression related flags I noticed were added in the latest MS-SMB2
--
Thanks,
Steve
From 12837ae091d533b58c80a0da43b92980b7ff5b6b Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@xxxxxxxxxxxxx>
Date: Sun, 15 Mar 2020 17:42:41 -0500
Subject: [PATCH] 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@xxxxxxxxxxxxx>
---
fs/cifs/smb2pdu.h | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 817bc0531536..4a7d154fffae 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;
--
2.20.1
