NEX-1643 dtrace provider for smbsrv
Also illumos 1841:
 DTrace smb provider was mis-implemented, doesn't exist.
Add back handlers for read/write raw, so that
 legacy dtrace consumers can find the probes.
Kill extra arg in smb_negotiate
Fix missing "done" probe with smb_notify
Add example consumer: smb-trace.d
fix soi_pid

@@ -380,23 +380,21 @@
                         negprot->ni_dialect = dialect;
                         negprot->ni_index = pos;
                 }
         }
 
-        DTRACE_SMB_2(op__Negotiate__start, smb_request_t *, sr,
-            smb_arg_negotiate_t, negprot);
+        DTRACE_SMB_1(op__Negotiate__start, smb_request_t *, sr);
 
         return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
 }
 
 void
 smb_post_negotiate(smb_request_t *sr)
 {
         smb_arg_negotiate_t     *negprot = sr->sr_negprot;
 
-        DTRACE_SMB_2(op__Negotiate__done, smb_request_t *, sr,
-            smb_arg_negotiate_t, negprot);
+        DTRACE_SMB_1(op__Negotiate__done, smb_request_t *, sr);
 
         bzero(negprot, sizeof (smb_arg_negotiate_t));
 }
 
 smb_sdrc_t