smb3: Add protocol structs for change notify support

Add the SMB3 protocol flag definitions and structs for
change notify.  Future patches will add the hooks to
allow it to be invoked from the client.

See MS-FSCC 2.6 and MS-SMB2 2.2.35

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>

diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index aaf3f03c95d042a42cbb83429a778f1b9f5cd55b..93dd3b4315855a0cbcb61898d098000273657624 100644 (file)
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -1145,6 +1145,42 @@ struct smb2_write_rsp {
        __u8   Buffer[1];
 } __packed;
 
+/* notify flags */
+#define SMB2_WATCH_TREE                        0x0001
+
+/* notify completion filter flags. See MS-FSCC 2.6 and MS-SMB2 2.2.35 */
+#define FILE_NOTIFY_CHANGE_FILE_NAME           0x00000001
+#define FILE_NOTIFY_CHANGE_DIR_NAME            0x00000002
+#define FILE_NOTIFY_CHANGE_ATTRIBUTES          0x00000004
+#define FILE_NOTIFY_CHANGE_SIZE                        0x00000008
+#define FILE_NOTIFY_CHANGE_LAST_WRITE          0x00000010
+#define FILE_NOTIFY_CHANGE_LAST_ACCESS         0x00000020
+#define FILE_NOTIFY_CHANGE_CREATION            0x00000040
+#define FILE_NOTIFY_CHANGE_EA                  0x00000080
+#define FILE_NOTIFY_CHANGE_SECURITY            0x00000100
+#define FILE_NOTIFY_CHANGE_STREAM_NAME         0x00000200
+#define FILE_NOTIFY_CHANGE_STREAM_SIZE         0x00000400
+#define FILE_NOTIFY_CHANGE_STREAM_WRITE                0x00000800
+
+struct smb2_change_notify_req {
+       struct smb2_sync_hdr sync_hdr;
+       __le16  StructureSize;
+       __le16  Flags;
+       __le32  OutputBufferLength;
+       __u64   PersistentFileId; /* opaque endianness */
+       __u64   VolatileFileId; /* opaque endianness */
+       __le32  CompletionFilter;
+       __u32   Reserved;
+} __packed;
+
+struct smb2_change_notify_rsp {
+       struct smb2_sync_hdr sync_hdr;
+       __le16  StructureSize;  /* Must be 9 */
+       __le16  OutputBufferOffset;
+       __le32  OutputBufferLength;
+       __u8    Buffer[1]; /* array of file notify structs */
+} __packed;
+
 #define SMB2_LOCKFLAG_SHARED_LOCK      0x0001
 #define SMB2_LOCKFLAG_EXCLUSIVE_LOCK   0x0002
 #define SMB2_LOCKFLAG_UNLOCK           0x0004