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

@@ -98,12 +98,11 @@
             &tcon->password, &tcon->service);
 
         tcon->flags = 0;
         tcon->optional_support = 0;
 
-        DTRACE_SMB_2(op__TreeConnect__start, smb_request_t *, sr,
-            smb_arg_tcon_t *, tcon);
+        DTRACE_SMB_1(op__TreeConnect__start, smb_request_t *, sr);
 
         return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
 }
 
 void

@@ -289,12 +288,11 @@
                 tcon->password = (char *)pwbuf;
         }
 
         tcon->optional_support = 0;
 
-        DTRACE_SMB_2(op__TreeConnectX__start, smb_request_t *, sr,
-            smb_arg_tcon_t *, tcon);
+        DTRACE_SMB_1(op__TreeConnectX__start, smb_request_t *, sr);
 
         return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
 }
 
 void