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 2010 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 27 #include <c2/audit.h> 28 #include <c2/audit_kernel.h> 29 #include <c2/audit_record.h> 30 #include <sys/kmem.h> 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/taskq.h> 34 #include <sys/t_lock.h> 35 #include <sys/thread.h> 36 #include <sys/types.h> 37 #include <sys/zone.h> 38 39 zone_key_t au_zone_key; 40 41 /*ARGSUSED*/ 42 static void * 43 au_zone_init(zoneid_t zone) 44 { 45 au_kcontext_t *kctx = kmem_zalloc(sizeof (au_kcontext_t), KM_SLEEP); 46 static au_kcontext_t *global_kctx = NULL; 47 48 /* 49 * INGLOBALZONE(curproc) is invalid at this point, so check for 50 * zone 0 51 */ 52 53 if (zone == 0) { 54 global_kctx = kctx; 55 global_zone->zone_audit_kctxt = kctx; 56 } else { 57 kctx->auk_policy = global_kctx->auk_policy; 58 curproc->p_zone->zone_audit_kctxt = kctx; 59 } 60 kctx->auk_valid = AUK_VALID; 61 kctx->auk_zid = zone; 62 63 kctx->auk_info.ai_termid.at_type = AU_IPv4; 64 kctx->auk_info.ai_auid = AU_NOAUDITID; 65 kctx->auk_auditstate = AUC_INIT_AUDIT; 66 67 /* setup defaults for audit queue flow control */ 68 kctx->auk_queue.hiwater = AQ_HIWATER; 69 kctx->auk_queue.lowater = AQ_LOWATER; 70 kctx->auk_queue.bufsz = AQ_BUFSZ; 71 kctx->auk_queue.buflen = AQ_BUFSZ; 72 kctx->auk_queue.delay = AQ_DELAY; 73 74 /* statistics per zone */ 75 kctx->auk_statistics.as_version = TOKEN_VERSION; 76 kctx->auk_statistics.as_numevent = MAX_KEVENTS; 77 78 /* door IO buffer: */ 79 kctx->auk_dbuffer = 80 kmem_alloc(AU_DBUF_HEADER + kctx->auk_queue.bufsz, KM_SLEEP); 81 82 /* locks and cv's */ 83 84 mutex_init(&(kctx->auk_eagain_mutex), NULL, MUTEX_DEFAULT, NULL); 85 cv_init(&(kctx->auk_eagain_cv), NULL, CV_DRIVER, NULL); 86 87 mutex_init(&(kctx->auk_svc_lock), NULL, MUTEX_DEFAULT, NULL); 88 89 mutex_init(&(kctx->auk_queue.lock), NULL, MUTEX_DEFAULT, NULL); 90 cv_init(&(kctx->auk_queue.write_cv), NULL, CV_DRIVER, NULL); 91 cv_init(&(kctx->auk_queue.read_cv), NULL, CV_DRIVER, NULL); 92 93 return (kctx); 94 } 95 96 /*ARGSUSED*/ 97 static void 98 au_zone_shutdown(zoneid_t zone, void *arg) 99 { 100 au_kcontext_t *kctx = arg; 101 102 if (audit_active == C2AUDIT_LOADED && (kctx->auk_zid == GLOBAL_ZONEID || 103 (audit_policy | AUDIT_PERZONE)) && (kctx->auk_current_vp != NULL)) 104 (void) au_doormsg(kctx, AU_DBUF_SHUTDOWN, NULL); 105 106 kctx->auk_valid = AUK_INVALID; 107 108 /* shutdown the output thread if it is still running */ 109 kctx->auk_auditstate = AUC_NOAUDIT; 110 111 if (kctx->auk_output_active) { 112 mutex_enter(&(kctx->auk_queue.lock)); 113 cv_broadcast(&(kctx->auk_queue.read_cv)); 114 mutex_exit(&(kctx->auk_queue.lock)); 115 116 taskq_destroy(kctx->auk_taskq); 117 } 118 } 119 120 /*ARGSUSED*/ 121 static void 122 au_zone_destroy(zoneid_t zone, void *arg) 123 { 124 au_kcontext_t *kctx = arg; 125 126 ASSERT(kctx->auk_auditstate == AUC_NOAUDIT); 127 128 mutex_destroy(&(kctx->auk_eagain_mutex)); 129 cv_destroy(&(kctx->auk_eagain_cv)); 130 131 mutex_destroy(&(kctx->auk_svc_lock)); 132 133 mutex_enter(&(kctx->auk_queue.lock)); 134 if (kctx->auk_queue.head != NULL) { 135 au_free_rec(kctx->auk_queue.head); 136 } 137 mutex_exit(&(kctx->auk_queue.lock)); 138 139 mutex_destroy(&(kctx->auk_queue.lock)); 140 141 cv_destroy(&(kctx->auk_queue.write_cv)); 142 cv_destroy(&(kctx->auk_queue.read_cv)); 143 144 kmem_free(kctx->auk_dbuffer, AU_DBUF_HEADER + kctx->auk_queue.bufsz); 145 146 kmem_free(kctx, sizeof (au_kcontext_t)); 147 } 148 149 void 150 au_zone_setup() 151 { 152 zone_key_create(&au_zone_key, au_zone_init, au_zone_shutdown, 153 au_zone_destroy); 154 155 } 156 157 int 158 au_zone_getstate(const au_kcontext_t *context) 159 { 160 au_kcontext_t *tcontext; 161 162 if (context != NULL) 163 return (context->auk_auditstate); 164 tcontext = GET_KCTX_PZ; 165 return (tcontext->auk_auditstate); 166 } 167