smb_unlock_byte_range.c revision 12508:edb7861a1533 
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/*
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26/*
27 * SMB: unlock_byte_range
28 *
29 * This message is sent to unlock the given byte range.  Offset, Count, and
30 * Pid must be identical to that specified in a prior successful lock.  If
31 *
32 * an unlock references an address range that is not locked, no error is
33 * generated.
34 *
35 * Since Offset is a 32 bit quantity, this request is inappropriate for
36 * general locking within a very large file.
37 *
38 * Client Request                     Description
39 * ================================== =================================
40 *
41 * UCHAR WordCount;                   Count of parameter words = 5
42 * USHORT Fid;                        File handle
43 * ULONG Count;                       Count of bytes to unlock
44 * ULONG Offset;                      Offset from start of file
45 * USHORT ByteCount;                  Count of data bytes = 0
46 *
47 * Server Response                    Description
48 * ================================== =================================
49 *
50 * UCHAR WordCount;                   Count of parameter words = 0
51 * USHORT ByteCount;                  Count of data bytes = 0
52 */
53
54#include <smbsrv/smb_kproto.h>
55
56smb_sdrc_t
57smb_pre_unlock_byte_range(smb_request_t *sr)
58{
59	DTRACE_SMB_1(op__UnlockByteRange__start, smb_request_t *, sr);
60	return (SDRC_SUCCESS);
61}
62
63void
64smb_post_unlock_byte_range(smb_request_t *sr)
65{
66	DTRACE_SMB_1(op__UnlockByteRange__done, smb_request_t *, sr);
67}
68
69smb_sdrc_t
70smb_com_unlock_byte_range(smb_request_t *sr)
71{
72	uint32_t	Length;
73	uint32_t	Offset;
74	DWORD		result;
75
76	if (smbsr_decode_vwv(sr, "wll", &sr->smb_fid, &Length, &Offset) != 0)
77		return (SDRC_ERROR);
78
79	smbsr_lookup_file(sr);
80	if (sr->fid_ofile == NULL) {
81		smbsr_error(sr, NT_STATUS_INVALID_HANDLE, ERRDOS, ERRbadfid);
82		return (SDRC_ERROR);
83	}
84
85	result = smb_unlock_range(sr, sr->fid_ofile->f_node,
86	    (u_offset_t)Offset, (uint64_t)Length);
87	if (result != NT_STATUS_SUCCESS) {
88		smbsr_error(sr, NT_STATUS_RANGE_NOT_LOCKED,
89		    ERRDOS, ERROR_NOT_LOCKED);
90		return (SDRC_ERROR);
91	}
92
93	if (smbsr_encode_empty_result(sr))
94		return (SDRC_ERROR);
95
96	return (SDRC_SUCCESS);
97}
98