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 
  56 smb_sdrc_t
  57 smb_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 
  63 void
  64 smb_post_unlock_byte_range(smb_request_t *sr)
  65 {
  66         DTRACE_SMB_1(op__UnlockByteRange__done, smb_request_t *, sr);
  67 }
  68 
  69 smb_sdrc_t
  70 smb_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 }