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