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 2008 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #pragma ident	"%Z%%M%	%I%	%E% SMI"
27 
28 /*
29  * SMB: nt_cancel
30  *
31  * This SMB allows a client to cancel a request currently pending at the
32  * server.
33  *
34  * Client Request                     Description
35  * ================================== =================================
36  *
37  * UCHAR WordCount;                   No words are sent (== 0)
38  * USHORT ByteCount;                  No bytes (==0)
39  *
40  * The Sid, Uid, Pid, Tid, and Mid fields of the SMB are used to locate an
41  * pending server request from this session.  If a pending request is
42  * found, it is "hurried along" which may result in success or failure of
43  * the original request.  No other response is generated for this SMB.
44  */
45 
46 #include <smbsrv/smb_incl.h>
47 
48 smb_sdrc_t
49 smb_pre_nt_cancel(smb_request_t *sr)
50 {
51 	DTRACE_SMB_1(op__NtCancel__start, smb_request_t *, sr);
52 	return (SDRC_SUCCESS);
53 }
54 
55 void
56 smb_post_nt_cancel(smb_request_t *sr)
57 {
58 	DTRACE_SMB_1(op__NtCancel__done, smb_request_t *, sr);
59 }
60 
61 smb_sdrc_t
62 smb_com_nt_cancel(smb_request_t *sr)
63 {
64 	struct smb_request *req;
65 	struct smb_session *session;
66 
67 	session = sr->session;
68 
69 	smb_slist_enter(&session->s_req_list);
70 	req = smb_slist_head(&session->s_req_list);
71 	while (req) {
72 		ASSERT(req->sr_magic == SMB_REQ_MAGIC);
73 		if ((req != sr) &&
74 		    (req->smb_sid == sr->smb_sid) &&
75 		    (req->smb_uid == sr->smb_uid) &&
76 		    (req->smb_pid == sr->smb_pid) &&
77 		    (req->smb_tid == sr->smb_tid) &&
78 		    (req->smb_mid == sr->smb_mid)) {
79 			smb_request_cancel(req);
80 		}
81 		req = smb_slist_next(&session->s_req_list, req);
82 	}
83 	smb_slist_exit(&session->s_req_list);
84 
85 	/* Now, search the notify change queue to find the request */
86 
87 	smb_reply_specific_cancel_request(sr);
88 
89 	return (SDRC_NO_REPLY);
90 }
91