NEX-1643 dtrace provider for smbsrv
Reviewed by: Evan Layton <evan.layton@nexenta.com>
Reviewed by: Matt Barden <matt.barden@nexenta.com>
SMB-63 taskq_create_proc ... TQ_DYNAMIC puts tasks in p0
re #11974 CIFS Share - Tree connect fails from Windows 7 Clients

          --- old/usr/src/uts/common/fs/smbsrv/smb_process_exit.c
          +++ new/usr/src/uts/common/fs/smbsrv/smb_process_exit.c

   1    1  /*
   2    2   * CDDL HEADER START
   3    3   *
   4    4   * The contents of this file are subject to the terms of the
   5    5   * Common Development and Distribution License (the "License").
   6    6   * You may not use this file except in compliance with the License.
   7    7   *
   8    8   * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9    9   * or http://www.opensolaris.org/os/licensing.
  10   10   * See the License for the specific language governing permissions
  11   11   * and limitations under the License.
  12   12   *
  13   13   * When distributing Covered Code, include this CDDL HEADER in each

  14   14   * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15   15   * If applicable, add the following below this CDDL HEADER, with the
  16   16   * fields enclosed by brackets "[]" replaced with your own identifying
  17   17   * information: Portions Copyright [yyyy] [name of copyright owner]
  18   18   *
  19   19   * CDDL HEADER END
  20   20   */
  21   21  /*
  22   22   * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  23   23   * Use is subject to license terms.
       24 + *
       25 + * Copyright 2017 Nexenta Systems, Inc.  All rights reserved.
  24   26   */
  25   27  
  26   28  /*
  27   29   * SMB: process_exit
  28   30   *
  29   31   * This command informs the server that a client process has terminated.
  30   32   * The server must close all files opened by Pid in the SMB header.  This
  31   33   * must automatically release all locks the process holds.
  32   34   *
  33   35   * Client Request                     Description

  34   36   * ================================== =================================
  35   37   *
  36   38   * UCHAR WordCount;                   Count of parameter words = 0
  37   39   * USHORT ByteCount;                  Count of data bytes = 0
  38   40   *
  39   41   * Server Response                    Description
  40   42   * ================================== =================================
  41   43   *
  42   44   * UCHAR WordCount;                   Count of parameter words = 0
  43   45   *  USHORT ByteCount;                 Count of data bytes = 0
  44   46   *
  45   47   * This SMB should not generate any errors from the server, unless the
  46   48   * server is a user mode server and Uid in the SMB header is invalid.
  47   49   *
  48   50   * Clients are not required to send this SMB, they can do all cleanup

  49   51   * necessary by sending close SMBs to the server to release resources.  In
  50   52   * fact, clients who have negotiated LANMAN 1.0 and later probably do not
  51   53   * send this message at all.
  52   54   */
  53   55  
  54   56  #include <smbsrv/smb_kproto.h>
  55   57  
  56   58  smb_sdrc_t
  57   59  smb_pre_process_exit(smb_request_t *sr)
  58   60  {
  59      -        DTRACE_SMB_1(op__ProcessExit__start, smb_request_t *, sr);
       61 +        DTRACE_SMB_START(op__ProcessExit, smb_request_t *, sr);
  60   62          return (SDRC_SUCCESS);
  61   63  }
  62   64  
  63   65  void
  64   66  smb_post_process_exit(smb_request_t *sr)
  65   67  {
  66      -        DTRACE_SMB_1(op__ProcessExit__done, smb_request_t *, sr);
       68 +        DTRACE_SMB_DONE(op__ProcessExit, smb_request_t *, sr);
  67   69  }
  68   70  
  69   71  smb_sdrc_t
  70   72  smb_com_process_exit(smb_request_t *sr)
  71   73  {
  72   74          int rc;
  73   75  
  74   76          sr->uid_user = smb_session_lookup_uid(sr->session, sr->smb_uid);
  75   77          if (sr->uid_user == NULL) {
  76   78                  rc = smbsr_encode_empty_result(sr);

  77   79                  return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
  78   80          }
  79   81  
  80   82          sr->user_cr = smb_user_getcred(sr->uid_user);
  81   83  
  82   84          /*
  83   85           * If request has a valid tree ID, only look for the PID within
  84   86           * that tree.  Otherwise look in all the trees.  smbtorture seems
  85   87           * to be the only thing that sends this request these days and
  86   88           * it doesn't provide a TID.
  87   89           */
  88   90          sr->tid_tree = smb_session_lookup_tree(sr->session, sr->smb_tid);
  89   91          if (sr->tid_tree != NULL)
  90   92                  smb_tree_close_pid(sr->tid_tree, sr->smb_pid);
  91   93          else
  92   94                  smb_session_close_pid(sr->session, sr->smb_pid);
  93   95  
  94   96          rc = smbsr_encode_empty_result(sr);
  95   97          return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
  96   98  }

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