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-rw-r--r--fs/cifs/smb2pdu.c5
-rw-r--r--fs/cifs/smb2pdu.h26
2 files changed, 27 insertions, 4 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 36cc34318429..a932dccafc5b 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -459,10 +459,7 @@ smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
return rc;
}
-
-#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
-#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
-#define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100)
+/* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */
static void
build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index ee8977688e21..58158e91b9d1 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -251,6 +251,14 @@ struct smb2_negotiate_req {
#define SMB2_NT_FIND 0x00100000
#define SMB2_LARGE_FILES 0x00200000
+
+/* Negotiate Contexts - ContextTypes. See MS-SMB2 section 2.2.3.1 for details */
+#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
+#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
+#define SMB2_COMPRESSION_CAPABILITIES cpu_to_le16(3)
+#define SMB2_NETNAME_NEGOTIATE_CONTEXT_ID cpu_to_le16(5)
+#define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100)
+
struct smb2_neg_context {
__le16 ContextType;
__le16 DataLength;
@@ -288,6 +296,24 @@ struct smb2_encryption_neg_context {
__le16 Ciphers[1]; /* Ciphers[0] since only one used now */
} __packed;
+/* See MS-SMB2 2.2.3.1.3 */
+#define SMB3_COMPRESS_NONE 0x0000
+#define SMB3_COMPRESS_LZNT1 0x0001
+#define SMB3_COMPRESS_LZ77 0x0002
+#define SMB3_COMPRESS_LZ77_HUFF 0x0003
+
+struct smb2_compression_capabilities_context {
+ __le16 CompressionAlgorithmCount;
+ __u16 Padding;
+ __u32 Reserved;
+ __u16 CompressionAlgorithms[1];
+} __packed;
+
+/*
+ * For smb2_netname_negotiate_context_id See MS-SMB2 2.2.3.1.4.
+ * Its struct simply contains NetName, an array of Unicode characters
+ */
+
#define POSIX_CTXT_DATA_LEN 16
struct smb2_posix_neg_context {
__le16 ContextType; /* 0x100 */