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 * Copyright 2016 Syneto S.R.L. All rights reserved. 26 * Copyright 2017 Nexenta Systems, Inc. All rights reserved. 27 */ 28 29 /* 30 * The flush SMB is sent to ensure all data and allocation information 31 * for the corresponding file has been written to stable storage. This 32 * is a synchronous request. The response should not be sent until the 33 * writes are complete. 34 * 35 * The SmbFlush request is described in CIFS/1.0 1996 Section 3.9.14. 36 * 37 * CIFS/1.0 June 13, 1996 38 * Heizer, et al 39 * draft-heizer-cifs-v1-spec-00.txt 40 */ 41 42 #include <smbsrv/smb_kproto.h> 43 #include <smbsrv/smb_fsops.h> 44 45 46 /* 47 * smb_com_flush 48 * 49 * Flush any cached data for a specified file, or for all files that 50 * this client has open, to stable storage. If the fid is valid (i.e. 51 * not 0xFFFF), we flush only that file. Otherwise we flush all files 52 * associated with this client. 53 * 54 * We need to protect the list because there's a good chance we'll 55 * block during the flush operation. 56 */ 57 smb_sdrc_t 58 smb_pre_flush(smb_request_t *sr) 59 { 60 int rc; 61 62 rc = smbsr_decode_vwv(sr, "w", &sr->smb_fid); 63 64 DTRACE_SMB_START(op__Flush, smb_request_t *, sr); 65 66 return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR); 67 } 68 69 void 70 smb_post_flush(smb_request_t *sr) 71 { 72 DTRACE_SMB_DONE(op__Flush, smb_request_t *, sr); 73 } 74 75 smb_sdrc_t 76 smb_com_flush(smb_request_t *sr) 77 { 78 smb_ofile_t *file; 79 smb_llist_t *flist; 80 int rc; 81 82 if (smb_flush_required == 0) { 83 rc = smbsr_encode_empty_result(sr); 84 return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR); 85 } 86 87 if (sr->smb_fid != 0xffff) { 88 smbsr_lookup_file(sr); 89 if (sr->fid_ofile == NULL) { 90 smbsr_error(sr, NT_STATUS_INVALID_HANDLE, 91 ERRDOS, ERRbadfid); 92 return (SDRC_ERROR); 93 } 94 smb_ofile_flush(sr, sr->fid_ofile); 95 } else { 96 flist = &sr->tid_tree->t_ofile_list; 97 smb_llist_enter(flist, RW_READER); 98 file = smb_llist_head(flist); 99 while (file) { 100 mutex_enter(&file->f_mutex); 101 smb_ofile_flush(sr, file); 102 mutex_exit(&file->f_mutex); 103 file = smb_llist_next(flist, file); 104 } 105 smb_llist_exit(flist); 106 } 107 108 rc = smbsr_encode_empty_result(sr); 109 return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR); 110 } 111