CIFS: Map SMB2 status codes to POSIX errors

Add mapping table for 32 bit SMB2 status codes to linux errors.
Note that SMB2 does not use DOS/OS2 errors (ever) so mapping to
DOS/OS2 errors as a common network subset (as we do for cifs)
doesn't help. And note that the set of status codes is much more
complete here.

Signed-off-by: Steve French <sfrench@us.ibm.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
new file mode 100644
index 000000000000..d35ac689f24b
--- /dev/null
+++ b/fs/cifs/smb2pdu.h
@@ -0,0 +1,56 @@
+/*
+ *   fs/cifs/smb2pdu.h
+ *
+ *   Copyright (c) International Business Machines  Corp., 2009, 2010
+ *                 Etersoft, 2012
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Pavel Shilovsky (pshilovsky@samba.org) 2012
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _SMB2PDU_H
+#define _SMB2PDU_H
+
+#include <net/sock.h>
+
+/*
+ * SMB2 Header Definition
+ *
+ * "MBZ" :  Must be Zero
+ * "BB"  :  BugBug, Something to check/review/analyze later
+ * "PDU" :  "Protocol Data Unit" (ie a network "frame")
+ *
+ */
+struct smb2_hdr {
+        __be32 smb2_buf_length; /* big endian on wire */
+                                /* length is only two or three bytes - with
+                                 one or two byte type preceding it that MBZ */
+        __u8   ProtocolId[4];   /* 0xFE 'S' 'M' 'B' */
+        __le16 StructureSize;   /* 64 */
+        __le16 CreditCharge;    /* MBZ */
+        __le32 Status;          /* Error from server */
+        __le16 Command;
+        __le16 CreditRequest;  /* CreditResponse */
+        __le32 Flags;
+        __le32 NextCommand;
+        __u64  MessageId;       /* opaque - so can stay little endian */
+        __le32 ProcessId;
+        __u32  TreeId;          /* opaque - so do not make little endian */
+        __u64  SessionId;       /* opaque - so do not make little endian */
+        __u8   Signature[16];
+} __packed;
+
+#endif                          /* _SMB2PDU_H */