cifs: add ability to send an echo request

Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index de36b09763a8..ea205b4fcad2 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -50,6 +50,7 @@
 #define SMB_COM_SETATTR               0x09 /* trivial response */
 #define SMB_COM_LOCKING_ANDX          0x24 /* trivial response */
 #define SMB_COM_COPY                  0x29 /* trivial rsp, fail filename ignrd*/
+#define SMB_COM_ECHO                  0x2B /* echo request */
 #define SMB_COM_OPEN_ANDX             0x2D /* Legacy open for old servers */
 #define SMB_COM_READ_ANDX             0x2E
 #define SMB_COM_WRITE_ANDX            0x2F
@@ -760,6 +761,20 @@ typedef struct smb_com_tconx_rsp_ext {
  *
  */
 
+typedef struct smb_com_echo_req {
+        struct  smb_hdr hdr;
+        __le16  EchoCount;
+        __le16  ByteCount;
+        char    Data[1];
+} __attribute__((packed)) ECHO_REQ;
+
+typedef struct smb_com_echo_rsp {
+        struct  smb_hdr hdr;
+        __le16  SequenceNumber;
+        __le16  ByteCount;
+        char    Data[1];
+} __attribute__((packed)) ECHO_RSP;
+
 typedef struct smb_com_logoff_andx_req {
         struct smb_hdr hdr;     /* wct = 2 */
         __u8 AndXCommand;