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: unlock_byte_range
30  *
31  * This message is sent to unlock the given byte range.  Offset, Count, and
32  * Pid must be identical to that specified in a prior successful lock.  If
33  *
34  * an unlock references an address range that is not locked, no error is
35  * generated.
36  *
37  * Since Offset is a 32 bit quantity, this request is inappropriate for
38  * general locking within a very large file.
39  *
40  * Client Request                     Description
41  * ================================== =================================
42  *
43  * UCHAR WordCount;                   Count of parameter words = 5
44  * USHORT Fid;                        File handle
45  * ULONG Count;                       Count of bytes to unlock
46  * ULONG Offset;                      Offset from start of file
47  * USHORT ByteCount;                  Count of data bytes = 0
48  *
49  * Server Response                    Description
50  * ================================== =================================
51  *
52  * UCHAR WordCount;                   Count of parameter words = 0
53  * USHORT ByteCount;                  Count of data bytes = 0
54  */
55 
56 #include <smbsrv/smb_incl.h>
57 
58 smb_sdrc_t
59 smb_pre_unlock_byte_range(smb_request_t *sr)
60 {
61 	DTRACE_SMB_1(op__UnlockByteRange__start, smb_request_t *, sr);
62 	return (SDRC_SUCCESS);
63 }
64 
65 void
66 smb_post_unlock_byte_range(smb_request_t *sr)
67 {
68 	DTRACE_SMB_1(op__UnlockByteRange__done, smb_request_t *, sr);
69 }
70 
71 smb_sdrc_t
72 smb_com_unlock_byte_range(smb_request_t *sr)
73 {
74 	uint32_t	Length;
75 	uint32_t	Offset;
76 	DWORD		result;
77 
78 	if (smbsr_decode_vwv(sr, "wll", &sr->smb_fid, &Length, &Offset) != 0)
79 		return (SDRC_ERROR);
80 
81 	sr->fid_ofile = smb_ofile_lookup_by_fid(sr->tid_tree, sr->smb_fid);
82 	if (sr->fid_ofile == NULL) {
83 		smbsr_error(sr, NT_STATUS_INVALID_HANDLE, ERRDOS, ERRbadfid);
84 		return (SDRC_ERROR);
85 	}
86 
87 	result = smb_unlock_range(sr, sr->fid_ofile->f_node,
88 	    (u_offset_t)Offset, (uint64_t)Length);
89 	if (result != NT_STATUS_SUCCESS) {
90 		smbsr_error(sr, NT_STATUS_RANGE_NOT_LOCKED,
91 		    ERRDOS, ERRnotlocked);
92 		return (SDRC_ERROR);
93 	}
94 
95 	if (smbsr_encode_empty_result(sr))
96 		return (SDRC_ERROR);
97 
98 	return (SDRC_SUCCESS);
99 }
100