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. 24 * Copyright 2018 Nexenta Systems, Inc. All rights reserved. 25 * Copyright 2022 RackTop Systems, Inc. 26 */ 27 28 /* 29 * Dispatch function for SMB2_CHANGE_NOTIFY 30 */ 31 32 #include <smbsrv/smb2_kproto.h> 33 34 /* For the output DataOffset fields in here. */ 35 #define DATA_OFF (SMB2_HDR_SIZE + 8) 36 37 smb_sdrc_t 38 smb2_change_notify(smb_request_t *sr) 39 { 40 uint16_t StructSize; 41 uint16_t iFlags; 42 uint32_t oBufLength; 43 smb2fid_t smb2fid; 44 uint32_t CompletionFilter; 45 uint32_t reserved; 46 uint32_t status; 47 int rc = 0; 48 49 /* 50 * SMB2 Change Notify request 51 */ 52 rc = smb_mbc_decodef( 53 &sr->smb_data, "wwlqqll", 54 &StructSize, /* w */ 55 &iFlags, /* w */ 56 &oBufLength, /* l */ 57 &smb2fid.persistent, /* q */ 58 &smb2fid.temporal, /* q */ 59 &CompletionFilter, /* l */ 60 &reserved); /* l */ 61 if (rc || StructSize != 32) 62 return (SDRC_ERROR); 63 64 status = smb2sr_lookup_fid(sr, &smb2fid); 65 DTRACE_SMB2_START(op__ChangeNotify, smb_request_t *, sr); 66 67 if (status != 0) 68 goto errout; /* Bad FID */ 69 70 /* 71 * Only deal with change notify last in a compound, 72 * because it blocks indefinitely. This status gets 73 * "sticky" handling in smb2sr_work(). 74 */ 75 if (sr->smb2_next_command != 0) { 76 status = NT_STATUS_INSUFFICIENT_RESOURCES; 77 goto errout; 78 } 79 80 CompletionFilter &= FILE_NOTIFY_VALID_MASK; 81 if (iFlags & SMB2_WATCH_TREE) 82 CompletionFilter |= FILE_NOTIFY_CHANGE_EV_SUBDIR; 83 84 if (oBufLength > smb2_max_trans) { 85 status = NT_STATUS_INVALID_PARAMETER; 86 goto errout; 87 } 88 89 /* 90 * Check for events and consume, non-blocking. 91 * Special return STATUS_PENDING means: 92 * No events; caller must call "act2" next. 93 * SMB2 does that in "async mode". 94 */ 95 status = smb_notify_act1(sr, oBufLength, CompletionFilter); 96 if (status == NT_STATUS_PENDING) { 97 status = smb2sr_go_async(sr); 98 if (status != 0) 99 goto errout; 100 status = smb_notify_act2(sr); 101 if (status == NT_STATUS_PENDING) { 102 /* See next: smb2_change_notify_finish */ 103 return (SDRC_SR_KEPT); 104 } 105 } 106 107 errout: 108 sr->smb2_status = status; 109 DTRACE_SMB2_DONE(op__ChangeNotify, smb_request_t *, sr); 110 111 if (NT_SC_SEVERITY(status) == NT_STATUS_SEVERITY_SUCCESS) { 112 oBufLength = sr->raw_data.chain_offset; 113 (void) smb_mbc_encodef( 114 &sr->reply, "wwlC", 115 9, /* StructSize */ /* w */ 116 DATA_OFF, /* w */ 117 oBufLength, /* l */ 118 &sr->raw_data); /* C */ 119 } else { 120 smb2sr_put_error(sr, status); 121 } 122 123 return (SDRC_SUCCESS); 124 } 125 126 /* 127 * This is called via taskq_dispatch in smb_notify.c 128 * to finish up an NT transact notify change request. 129 * Build an SMB2 Change Notify reply and send it. 130 */ 131 void 132 smb2_change_notify_finish(void *arg) 133 { 134 smb_request_t *sr = arg; 135 smb_disp_stats_t *sds; 136 uint32_t status; 137 uint32_t oBufLength; 138 139 SMB_REQ_VALID(sr); 140 141 /* 142 * Common part of notify, puts data in sr->raw_data 143 */ 144 status = smb_notify_act3(sr); 145 146 /* 147 * The prior thread returned SDRC_SR_KEPT and skiped 148 * the dtrace DONE probe, so fire that here. 149 */ 150 sr->smb2_status = status; 151 DTRACE_SMB2_DONE(op__ChangeNotify, smb_request_t *, sr); 152 153 if (NT_SC_SEVERITY(status) == NT_STATUS_SEVERITY_SUCCESS) { 154 oBufLength = sr->raw_data.chain_offset; 155 (void) smb_mbc_encodef( 156 &sr->reply, "wwlC", 157 9, /* StructSize */ /* w */ 158 DATA_OFF, /* w */ 159 oBufLength, /* l */ 160 &sr->raw_data); /* C */ 161 } else { 162 smb2sr_put_error(sr, status); 163 } 164 165 /* 166 * Record some statistics: (just tx bytes here) 167 */ 168 sds = &sr->session->s_server->sv_disp_stats2[SMB2_CHANGE_NOTIFY]; 169 atomic_add_64(&sds->sdt_txb, (int64_t)(sr->reply.chain_offset)); 170 171 /* 172 * Put (overwrite) the final SMB2 header, 173 * sign, send. 174 */ 175 (void) smb2_encode_header(sr, B_TRUE); 176 if (sr->smb2_hdr_flags & SMB2_FLAGS_SIGNED) 177 smb2_sign_reply(sr); 178 smb2_send_reply(sr); 179 180 mutex_enter(&sr->sr_mutex); 181 sr->sr_state = SMB_REQ_STATE_COMPLETED; 182 mutex_exit(&sr->sr_mutex); 183 184 smb_request_free(sr); 185 } 186