Build provider 3rd arg from smb_request_t
hacking...
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

*** 113,135 ****
                  *op->sd = sd;
          } else {
                  op->sd = NULL;
          }
  
!         DTRACE_SMB_2(op__NtTransactCreate__start, smb_request_t *, sr,
!             struct open_param *, op);
  
          return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
  }
  
  void
  smb_post_nt_transact_create(smb_request_t *sr, smb_xa_t *xa)
  {
          smb_sd_t *sd = sr->arg.open.sd;
  
!         DTRACE_SMB_2(op__NtTransactCreate__done, smb_request_t *, sr,
!             smb_xa_t *, xa);
  
          if (sd) {
                  smb_sd_term(sd);
                  kmem_free(sd, sizeof (smb_sd_t));
          }
--- 113,134 ----
                  *op->sd = sd;
          } else {
                  op->sd = NULL;
          }
  
!         DTRACE_SMB_1(op__NtTransactCreate__start, smb_request_t *, sr); /* arg.open */
  
          return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
  }
  
  void
  smb_post_nt_transact_create(smb_request_t *sr, smb_xa_t *xa)
  {
          smb_sd_t *sd = sr->arg.open.sd;
+         _NOTE(ARGUNUSED(xa))
  
!         DTRACE_SMB_1(op__NtTransactCreate__done, smb_request_t *, sr);
  
          if (sd) {
                  smb_sd_term(sd);
                  kmem_free(sd, sizeof (smb_sd_t));
          }