CIFS: Make transport routines work with SMB2

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index d35ac689f24b..c7f52e363d37 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -27,6 +27,65 @@
 #include <net/sock.h>
 
 /*
+ * Note that, due to trying to use names similar to the protocol specifications,
+ * there are many mixed case field names in the structures below.  Although
+ * this does not match typical Linux kernel style, it is necessary to be
+ * be able to match against the protocol specfication.
+ *
+ * SMB2 commands
+ * Some commands have minimal (wct=0,bcc=0), or uninteresting, responses
+ * (ie no useful data other than the SMB error code itself) and are marked such.
+ * Knowing this helps avoid response buffer allocations and copy in some cases.
+ */
+
+/* List of commands in host endian */
+#define SMB2_NEGOTIATE_HE       0x0000
+#define SMB2_SESSION_SETUP_HE   0x0001
+#define SMB2_LOGOFF_HE          0x0002 /* trivial request/resp */
+#define SMB2_TREE_CONNECT_HE    0x0003
+#define SMB2_TREE_DISCONNECT_HE 0x0004 /* trivial req/resp */
+#define SMB2_CREATE_HE          0x0005
+#define SMB2_CLOSE_HE           0x0006
+#define SMB2_FLUSH_HE           0x0007 /* trivial resp */
+#define SMB2_READ_HE            0x0008
+#define SMB2_WRITE_HE           0x0009
+#define SMB2_LOCK_HE            0x000A
+#define SMB2_IOCTL_HE           0x000B
+#define SMB2_CANCEL_HE          0x000C
+#define SMB2_ECHO_HE            0x000D
+#define SMB2_QUERY_DIRECTORY_HE 0x000E
+#define SMB2_CHANGE_NOTIFY_HE   0x000F
+#define SMB2_QUERY_INFO_HE      0x0010
+#define SMB2_SET_INFO_HE        0x0011
+#define SMB2_OPLOCK_BREAK_HE    0x0012
+
+/* The same list in little endian */
+#define SMB2_NEGOTIATE          cpu_to_le16(SMB2_NEGOTIATE_HE)
+#define SMB2_SESSION_SETUP      cpu_to_le16(SMB2_SESSION_SETUP_HE)
+#define SMB2_LOGOFF             cpu_to_le16(SMB2_LOGOFF_HE)
+#define SMB2_TREE_CONNECT       cpu_to_le16(SMB2_TREE_CONNECT_HE)
+#define SMB2_TREE_DISCONNECT    cpu_to_le16(SMB2_TREE_DISCONNECT_HE)
+#define SMB2_CREATE             cpu_to_le16(SMB2_CREATE_HE)
+#define SMB2_CLOSE              cpu_to_le16(SMB2_CLOSE_HE)
+#define SMB2_FLUSH              cpu_to_le16(SMB2_FLUSH_HE)
+#define SMB2_READ               cpu_to_le16(SMB2_READ_HE)
+#define SMB2_WRITE              cpu_to_le16(SMB2_WRITE_HE)
+#define SMB2_LOCK               cpu_to_le16(SMB2_LOCK_HE)
+#define SMB2_IOCTL              cpu_to_le16(SMB2_IOCTL_HE)
+#define SMB2_CANCEL             cpu_to_le16(SMB2_CANCEL_HE)
+#define SMB2_ECHO               cpu_to_le16(SMB2_ECHO_HE)
+#define SMB2_QUERY_DIRECTORY    cpu_to_le16(SMB2_QUERY_DIRECTORY_HE)
+#define SMB2_CHANGE_NOTIFY      cpu_to_le16(SMB2_CHANGE_NOTIFY_HE)
+#define SMB2_QUERY_INFO         cpu_to_le16(SMB2_QUERY_INFO_HE)
+#define SMB2_SET_INFO           cpu_to_le16(SMB2_SET_INFO_HE)
+#define SMB2_OPLOCK_BREAK       cpu_to_le16(SMB2_OPLOCK_BREAK_HE)
+
+#define NUMBER_OF_SMB2_COMMANDS 0x0013
+
+/* BB FIXME - analyze following length BB */
+#define MAX_SMB2_HDR_SIZE 0x78 /* 4 len + 64 hdr + (2*24 wct) + 2 bct + 2 pad */
+
+/*
  * SMB2 Header Definition
  *
  * "MBZ" :  Must be Zero