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 */ 25 /* 26 * SMB: lock_byte_range 27 * 28 * The lock record message is sent to lock the given byte range. More than 29 * one non-overlapping byte range may be locked in a given file. Locks 30 * prevent attempts to lock, read or write the locked portion of the file 31 * by other clients or Pids. Overlapping locks are not allowed. Offsets 32 * beyond the current end of file may be locked. Such locks will not cause 33 * allocation of file space. 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 lock 44 * ULONG Offset; Offset from start of file 45 * USHORT ByteCount; Count of data bytes = 0 46 * 47 * Locks may only be unlocked by the Pid that performed the lock. 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 * This client request does not wait for the lock to be granted. If the 56 * lock can not be immediately granted (within 200-300 ms), the server 57 * should return failure to the client 58 */ 59 60 #include <smbsrv/smb_kproto.h> 61 62 smb_sdrc_t 63 smb_pre_lock_byte_range(smb_request_t *sr) 64 { 65 DTRACE_SMB_1(op__LockByteRange__start, smb_request_t *, sr); 66 return (SDRC_SUCCESS); 67 } 68 69 void 70 smb_post_lock_byte_range(smb_request_t *sr) 71 { 72 DTRACE_SMB_1(op__LockByteRange__done, smb_request_t *, sr); 73 } 74 75 smb_sdrc_t 76 smb_com_lock_byte_range(struct smb_request *sr) 77 { 78 uint32_t count; 79 uint32_t off; 80 DWORD result; 81 int rc; 82 83 if (smbsr_decode_vwv(sr, "wll", &sr->smb_fid, &count, &off) != 0) 84 return (SDRC_ERROR); 85 86 smbsr_lookup_file(sr); 87 if (sr->fid_ofile == NULL) { 88 smbsr_error(sr, NT_STATUS_INVALID_HANDLE, 89 ERRDOS, ERRbadfid); 90 return (SDRC_ERROR); 91 } 92 93 /* 94 * The last parameter is lock type. This is dependent on 95 * lock flag (3rd parameter). Since the lock flag is 96 * set to be exclusive, lock type is passed as 97 * normal lock (write lock). 98 */ 99 result = smb_lock_range(sr, (u_offset_t)off, (uint64_t)count, 0, 100 SMB_LOCK_TYPE_READWRITE); 101 if (result != NT_STATUS_SUCCESS) { 102 smb_lock_range_error(sr, result); 103 return (SDRC_ERROR); 104 } 105 106 rc = smbsr_encode_empty_result(sr); 107 return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR); 108 } 109