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

*** 98,109 ****
              &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);
  
          return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
  }
  
  void
--- 98,108 ----
              &tcon->password, &tcon->service);
  
          tcon->flags = 0;
          tcon->optional_support = 0;
  
!         DTRACE_SMB_1(op__TreeConnect__start, smb_request_t *, sr);
  
          return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
  }
  
  void
*** 289,300 ****
                  tcon->password = (char *)pwbuf;
          }
  
          tcon->optional_support = 0;
  
!         DTRACE_SMB_2(op__TreeConnectX__start, smb_request_t *, sr,
!             smb_arg_tcon_t *, tcon);
  
          return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
  }
  
  void
--- 288,298 ----
                  tcon->password = (char *)pwbuf;
          }
  
          tcon->optional_support = 0;
  
!         DTRACE_SMB_1(op__TreeConnectX__start, smb_request_t *, sr);
  
          return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
  }
  
  void