1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  * Copyright 2012 Nexenta Systems, Inc.  All rights reserved.
  25  */
  26 
  27 /*
  28  * SMB: nt_cancel
  29  *
  30  * This SMB allows a client to cancel a request currently pending at the
  31  * server.
  32  *
  33  * Client Request                     Description
  34  * ================================== =================================
  35  *
  36  * UCHAR WordCount;                   No words are sent (== 0)
  37  * USHORT ByteCount;                  No bytes (==0)
  38  *
  39  * The Sid, Uid, Pid, Tid, and Mid fields of the SMB are used to locate an
  40  * pending server request from this session.  If a pending request is
  41  * found, it is "hurried along" which may result in success or failure of
  42  * the original request.  No other response is generated for this SMB.
  43  */
  44 
  45 #include <smbsrv/smb_kproto.h>
  46 
  47 smb_sdrc_t
  48 smb_pre_nt_cancel(smb_request_t *sr)
  49 {
  50         DTRACE_SMB_1(op__NtCancel__start, smb_request_t *, sr);
  51         return (SDRC_SUCCESS);
  52 }
  53 
  54 void
  55 smb_post_nt_cancel(smb_request_t *sr)
  56 {
  57         DTRACE_SMB_1(op__NtCancel__done, smb_request_t *, sr);
  58 }
  59 
  60 smb_sdrc_t
  61 smb_com_nt_cancel(smb_request_t *sr)
  62 {
  63         struct smb_request *req;
  64         struct smb_session *session;
  65 
  66         session = sr->session;
  67 
  68         smb_slist_enter(&session->s_req_list);
  69         req = smb_slist_head(&session->s_req_list);
  70         while (req) {
  71                 ASSERT(req->sr_magic == SMB_REQ_MAGIC);
  72                 if ((req != sr) &&
  73                     (req->smb_uid == sr->smb_uid) &&
  74                     (req->smb_pid == sr->smb_pid) &&
  75                     (req->smb_tid == sr->smb_tid) &&
  76                     (req->smb_mid == sr->smb_mid)) {
  77                         smb_request_cancel(req);
  78                 }
  79                 req = smb_slist_next(&session->s_req_list, req);
  80         }
  81         smb_slist_exit(&session->s_req_list);
  82 
  83         return (SDRC_NO_REPLY);
  84 }