1a6d42e7dSPeter Dunlap /* 2a6d42e7dSPeter Dunlap * CDDL HEADER START 3a6d42e7dSPeter Dunlap * 4a6d42e7dSPeter Dunlap * The contents of this file are subject to the terms of the 5a6d42e7dSPeter Dunlap * Common Development and Distribution License (the "License"). 6a6d42e7dSPeter Dunlap * You may not use this file except in compliance with the License. 7a6d42e7dSPeter Dunlap * 8a6d42e7dSPeter Dunlap * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9a6d42e7dSPeter Dunlap * or http://www.opensolaris.org/os/licensing. 10a6d42e7dSPeter Dunlap * See the License for the specific language governing permissions 11a6d42e7dSPeter Dunlap * and limitations under the License. 12a6d42e7dSPeter Dunlap * 13a6d42e7dSPeter Dunlap * When distributing Covered Code, include this CDDL HEADER in each 14a6d42e7dSPeter Dunlap * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15a6d42e7dSPeter Dunlap * If applicable, add the following below this CDDL HEADER, with the 16a6d42e7dSPeter Dunlap * fields enclosed by brackets "[]" replaced with your own identifying 17a6d42e7dSPeter Dunlap * information: Portions Copyright [yyyy] [name of copyright owner] 18a6d42e7dSPeter Dunlap * 19a6d42e7dSPeter Dunlap * CDDL HEADER END 20a6d42e7dSPeter Dunlap */ 21a6d42e7dSPeter Dunlap /* 22a6d42e7dSPeter Dunlap * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23a6d42e7dSPeter Dunlap * Use is subject to license terms. 24a6d42e7dSPeter Dunlap */ 25a6d42e7dSPeter Dunlap 26a6d42e7dSPeter Dunlap #include <sys/cpuvar.h> 27a6d42e7dSPeter Dunlap #include <sys/conf.h> 28a6d42e7dSPeter Dunlap #include <sys/file.h> 29a6d42e7dSPeter Dunlap #include <sys/ddi.h> 30a6d42e7dSPeter Dunlap #include <sys/sunddi.h> 31a6d42e7dSPeter Dunlap #include <sys/modctl.h> 32a6d42e7dSPeter Dunlap 33a6d42e7dSPeter Dunlap #include <sys/socket.h> 34a6d42e7dSPeter Dunlap #include <sys/strsubr.h> 35a6d42e7dSPeter Dunlap #include <sys/sysmacros.h> 36a6d42e7dSPeter Dunlap 37a6d42e7dSPeter Dunlap #include <sys/socketvar.h> 38a6d42e7dSPeter Dunlap #include <netinet/in.h> 39a6d42e7dSPeter Dunlap 40a6d42e7dSPeter Dunlap #include <sys/idm/idm.h> 41a6d42e7dSPeter Dunlap #include <sys/idm/idm_so.h> 42a6d42e7dSPeter Dunlap 43a6d42e7dSPeter Dunlap #define IDM_NAME_VERSION "iSCSI Data Mover" 44a6d42e7dSPeter Dunlap 45a6d42e7dSPeter Dunlap extern struct mod_ops mod_miscops; 46a6d42e7dSPeter Dunlap extern struct mod_ops mod_miscops; 47a6d42e7dSPeter Dunlap 48a6d42e7dSPeter Dunlap static struct modlmisc modlmisc = { 49a6d42e7dSPeter Dunlap &mod_miscops, /* Type of module */ 50a6d42e7dSPeter Dunlap IDM_NAME_VERSION 51a6d42e7dSPeter Dunlap }; 52a6d42e7dSPeter Dunlap 53a6d42e7dSPeter Dunlap static struct modlinkage modlinkage = { 54a6d42e7dSPeter Dunlap MODREV_1, (void *)&modlmisc, NULL 55a6d42e7dSPeter Dunlap }; 56a6d42e7dSPeter Dunlap 57a6d42e7dSPeter Dunlap extern int idm_task_compare(const void *t1, const void *t2); 58a6d42e7dSPeter Dunlap extern void idm_wd_thread(void *arg); 59a6d42e7dSPeter Dunlap 60a6d42e7dSPeter Dunlap static int _idm_init(void); 61a6d42e7dSPeter Dunlap static int _idm_fini(void); 62a6d42e7dSPeter Dunlap static void idm_buf_bind_in_locked(idm_task_t *idt, idm_buf_t *buf); 63a6d42e7dSPeter Dunlap static void idm_buf_bind_out_locked(idm_task_t *idt, idm_buf_t *buf); 64a6d42e7dSPeter Dunlap static void idm_buf_unbind_in_locked(idm_task_t *idt, idm_buf_t *buf); 65a6d42e7dSPeter Dunlap static void idm_buf_unbind_out_locked(idm_task_t *idt, idm_buf_t *buf); 66a6d42e7dSPeter Dunlap static void idm_task_abort_one(idm_conn_t *ic, idm_task_t *idt, 67a6d42e7dSPeter Dunlap idm_abort_type_t abort_type); 68a6d42e7dSPeter Dunlap static void idm_task_aborted(idm_task_t *idt, idm_status_t status); 69a6d42e7dSPeter Dunlap 70a6d42e7dSPeter Dunlap boolean_t idm_conn_logging = 0; 71a6d42e7dSPeter Dunlap boolean_t idm_svc_logging = 0; 72a6d42e7dSPeter Dunlap 73a6d42e7dSPeter Dunlap /* 74a6d42e7dSPeter Dunlap * Potential tuneable for the maximum number of tasks. Default to 75a6d42e7dSPeter Dunlap * IDM_TASKIDS_MAX 76a6d42e7dSPeter Dunlap */ 77a6d42e7dSPeter Dunlap 78a6d42e7dSPeter Dunlap uint32_t idm_max_taskids = IDM_TASKIDS_MAX; 79a6d42e7dSPeter Dunlap 80a6d42e7dSPeter Dunlap /* 81a6d42e7dSPeter Dunlap * Global list of transport handles 82a6d42e7dSPeter Dunlap * These are listed in preferential order, so we can simply take the 83a6d42e7dSPeter Dunlap * first "it_conn_is_capable" hit. Note also that the order maps to 84a6d42e7dSPeter Dunlap * the order of the idm_transport_type_t list. 85a6d42e7dSPeter Dunlap */ 86a6d42e7dSPeter Dunlap idm_transport_t idm_transport_list[] = { 87a6d42e7dSPeter Dunlap 88a6d42e7dSPeter Dunlap /* iSER on InfiniBand transport handle */ 89a6d42e7dSPeter Dunlap {IDM_TRANSPORT_TYPE_ISER, /* type */ 90a6d42e7dSPeter Dunlap "/devices/ib/iser@0:iser", /* device path */ 91a6d42e7dSPeter Dunlap NULL, /* LDI handle */ 92a6d42e7dSPeter Dunlap NULL, /* transport ops */ 93a6d42e7dSPeter Dunlap NULL}, /* transport caps */ 94a6d42e7dSPeter Dunlap 95a6d42e7dSPeter Dunlap /* IDM native sockets transport handle */ 96a6d42e7dSPeter Dunlap {IDM_TRANSPORT_TYPE_SOCKETS, /* type */ 97a6d42e7dSPeter Dunlap NULL, /* device path */ 98a6d42e7dSPeter Dunlap NULL, /* LDI handle */ 99a6d42e7dSPeter Dunlap NULL, /* transport ops */ 100a6d42e7dSPeter Dunlap NULL} /* transport caps */ 101a6d42e7dSPeter Dunlap 102a6d42e7dSPeter Dunlap }; 103a6d42e7dSPeter Dunlap 104a6d42e7dSPeter Dunlap int 105a6d42e7dSPeter Dunlap _init(void) 106a6d42e7dSPeter Dunlap { 107a6d42e7dSPeter Dunlap int rc; 108a6d42e7dSPeter Dunlap 109a6d42e7dSPeter Dunlap if ((rc = _idm_init()) != 0) { 110a6d42e7dSPeter Dunlap return (rc); 111a6d42e7dSPeter Dunlap } 112a6d42e7dSPeter Dunlap 113a6d42e7dSPeter Dunlap return (mod_install(&modlinkage)); 114a6d42e7dSPeter Dunlap } 115a6d42e7dSPeter Dunlap 116a6d42e7dSPeter Dunlap int 117a6d42e7dSPeter Dunlap _fini(void) 118a6d42e7dSPeter Dunlap { 119a6d42e7dSPeter Dunlap int rc; 120a6d42e7dSPeter Dunlap 121a6d42e7dSPeter Dunlap if ((rc = _idm_fini()) != 0) { 122a6d42e7dSPeter Dunlap return (rc); 123a6d42e7dSPeter Dunlap } 124a6d42e7dSPeter Dunlap 125a6d42e7dSPeter Dunlap if ((rc = mod_remove(&modlinkage)) != 0) { 126a6d42e7dSPeter Dunlap return (rc); 127a6d42e7dSPeter Dunlap } 128a6d42e7dSPeter Dunlap 129a6d42e7dSPeter Dunlap return (rc); 130a6d42e7dSPeter Dunlap } 131a6d42e7dSPeter Dunlap 132a6d42e7dSPeter Dunlap int 133a6d42e7dSPeter Dunlap _info(struct modinfo *modinfop) 134a6d42e7dSPeter Dunlap { 135a6d42e7dSPeter Dunlap return (mod_info(&modlinkage, modinfop)); 136a6d42e7dSPeter Dunlap } 137a6d42e7dSPeter Dunlap 138a6d42e7dSPeter Dunlap /* 139a6d42e7dSPeter Dunlap * idm_transport_register() 140a6d42e7dSPeter Dunlap * 141a6d42e7dSPeter Dunlap * Provides a mechanism for an IDM transport driver to register its 142a6d42e7dSPeter Dunlap * transport ops and caps with the IDM kernel module. Invoked during 143a6d42e7dSPeter Dunlap * a transport driver's attach routine. 144a6d42e7dSPeter Dunlap */ 145a6d42e7dSPeter Dunlap idm_status_t 146a6d42e7dSPeter Dunlap idm_transport_register(idm_transport_attr_t *attr) 147a6d42e7dSPeter Dunlap { 148a6d42e7dSPeter Dunlap ASSERT(attr->it_ops != NULL); 149a6d42e7dSPeter Dunlap ASSERT(attr->it_caps != NULL); 150a6d42e7dSPeter Dunlap 151a6d42e7dSPeter Dunlap switch (attr->type) { 152a6d42e7dSPeter Dunlap /* All known non-native transports here; for now, iSER */ 153a6d42e7dSPeter Dunlap case IDM_TRANSPORT_TYPE_ISER: 154a6d42e7dSPeter Dunlap idm_transport_list[attr->type].it_ops = attr->it_ops; 155a6d42e7dSPeter Dunlap idm_transport_list[attr->type].it_caps = attr->it_caps; 156a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 157a6d42e7dSPeter Dunlap 158a6d42e7dSPeter Dunlap default: 159a6d42e7dSPeter Dunlap cmn_err(CE_NOTE, "idm: unknown transport type (0x%x) in " 160a6d42e7dSPeter Dunlap "idm_transport_register", attr->type); 161a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 162a6d42e7dSPeter Dunlap } 163a6d42e7dSPeter Dunlap } 164a6d42e7dSPeter Dunlap 165a6d42e7dSPeter Dunlap /* 166a6d42e7dSPeter Dunlap * idm_ini_conn_create 167a6d42e7dSPeter Dunlap * 168a6d42e7dSPeter Dunlap * This function is invoked by the iSCSI layer to create a connection context. 169a6d42e7dSPeter Dunlap * This does not actually establish the socket connection. 170a6d42e7dSPeter Dunlap * 171a6d42e7dSPeter Dunlap * cr - Connection request parameters 172a6d42e7dSPeter Dunlap * new_con - Output parameter that contains the new request if successful 173a6d42e7dSPeter Dunlap * 174a6d42e7dSPeter Dunlap */ 175a6d42e7dSPeter Dunlap idm_status_t 176a6d42e7dSPeter Dunlap idm_ini_conn_create(idm_conn_req_t *cr, idm_conn_t **new_con) 177a6d42e7dSPeter Dunlap { 178a6d42e7dSPeter Dunlap idm_transport_t *it; 179a6d42e7dSPeter Dunlap idm_conn_t *ic; 180a6d42e7dSPeter Dunlap int rc; 181a6d42e7dSPeter Dunlap 182a6d42e7dSPeter Dunlap it = idm_transport_lookup(cr); 183a6d42e7dSPeter Dunlap 184a6d42e7dSPeter Dunlap retry: 185a6d42e7dSPeter Dunlap ic = idm_conn_create_common(CONN_TYPE_INI, it->it_type, 186a6d42e7dSPeter Dunlap &cr->icr_conn_ops); 187a6d42e7dSPeter Dunlap 188a6d42e7dSPeter Dunlap bcopy(&cr->cr_ini_dst_addr, &ic->ic_ini_dst_addr, 189a6d42e7dSPeter Dunlap sizeof (cr->cr_ini_dst_addr)); 190a6d42e7dSPeter Dunlap 191a6d42e7dSPeter Dunlap /* create the transport-specific connection components */ 192a6d42e7dSPeter Dunlap rc = it->it_ops->it_ini_conn_create(cr, ic); 193a6d42e7dSPeter Dunlap if (rc != IDM_STATUS_SUCCESS) { 194a6d42e7dSPeter Dunlap /* cleanup the failed connection */ 195a6d42e7dSPeter Dunlap idm_conn_destroy_common(ic); 196a6d42e7dSPeter Dunlap kmem_free(ic, sizeof (idm_conn_t)); 197a6d42e7dSPeter Dunlap 198a6d42e7dSPeter Dunlap /* 199a6d42e7dSPeter Dunlap * It is possible for an IB client to connect to 200a6d42e7dSPeter Dunlap * an ethernet-only client via an IB-eth gateway. 201a6d42e7dSPeter Dunlap * Therefore, if we are attempting to use iSER and 202a6d42e7dSPeter Dunlap * fail, retry with sockets before ultimately 203a6d42e7dSPeter Dunlap * failing the connection. 204a6d42e7dSPeter Dunlap */ 205a6d42e7dSPeter Dunlap if (it->it_type == IDM_TRANSPORT_TYPE_ISER) { 206a6d42e7dSPeter Dunlap it = &idm_transport_list[IDM_TRANSPORT_TYPE_SOCKETS]; 207a6d42e7dSPeter Dunlap goto retry; 208a6d42e7dSPeter Dunlap } 209a6d42e7dSPeter Dunlap 210a6d42e7dSPeter Dunlap return (IDM_STATUS_FAIL); 211a6d42e7dSPeter Dunlap } 212a6d42e7dSPeter Dunlap 213a6d42e7dSPeter Dunlap *new_con = ic; 214a6d42e7dSPeter Dunlap 215a6d42e7dSPeter Dunlap mutex_enter(&idm.idm_global_mutex); 216a6d42e7dSPeter Dunlap list_insert_tail(&idm.idm_ini_conn_list, ic); 217a6d42e7dSPeter Dunlap mutex_exit(&idm.idm_global_mutex); 218a6d42e7dSPeter Dunlap 219a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 220a6d42e7dSPeter Dunlap } 221a6d42e7dSPeter Dunlap 222a6d42e7dSPeter Dunlap /* 223a6d42e7dSPeter Dunlap * idm_ini_conn_destroy 224a6d42e7dSPeter Dunlap * 225a6d42e7dSPeter Dunlap * Releases any resources associated with the connection. This is the 226a6d42e7dSPeter Dunlap * complement to idm_ini_conn_create. 227a6d42e7dSPeter Dunlap * ic - idm_conn_t structure representing the relevant connection 228a6d42e7dSPeter Dunlap * 229a6d42e7dSPeter Dunlap */ 230a6d42e7dSPeter Dunlap void 231a6d42e7dSPeter Dunlap idm_ini_conn_destroy(idm_conn_t *ic) 232a6d42e7dSPeter Dunlap { 233a6d42e7dSPeter Dunlap mutex_enter(&idm.idm_global_mutex); 234a6d42e7dSPeter Dunlap list_remove(&idm.idm_ini_conn_list, ic); 235a6d42e7dSPeter Dunlap mutex_exit(&idm.idm_global_mutex); 236a6d42e7dSPeter Dunlap 237a6d42e7dSPeter Dunlap ic->ic_transport_ops->it_ini_conn_destroy(ic); 238a6d42e7dSPeter Dunlap idm_conn_destroy_common(ic); 239a6d42e7dSPeter Dunlap } 240a6d42e7dSPeter Dunlap 241a6d42e7dSPeter Dunlap /* 242a6d42e7dSPeter Dunlap * idm_ini_conn_connect 243a6d42e7dSPeter Dunlap * 244a6d42e7dSPeter Dunlap * Establish connection to the remote system identified in idm_conn_t. 245a6d42e7dSPeter Dunlap * The connection parameters including the remote IP address were established 246a6d42e7dSPeter Dunlap * in the call to idm_ini_conn_create. 247a6d42e7dSPeter Dunlap * 248a6d42e7dSPeter Dunlap * ic - idm_conn_t structure representing the relevant connection 249a6d42e7dSPeter Dunlap * 250a6d42e7dSPeter Dunlap * Returns success if the connection was established, otherwise some kind 251a6d42e7dSPeter Dunlap * of meaningful error code. 252a6d42e7dSPeter Dunlap * 253a6d42e7dSPeter Dunlap * Upon return the initiator can send a "login" request when it is ready. 254a6d42e7dSPeter Dunlap */ 255a6d42e7dSPeter Dunlap idm_status_t 256a6d42e7dSPeter Dunlap idm_ini_conn_connect(idm_conn_t *ic) 257a6d42e7dSPeter Dunlap { 258a6d42e7dSPeter Dunlap idm_status_t rc; 259a6d42e7dSPeter Dunlap 260a6d42e7dSPeter Dunlap rc = idm_conn_sm_init(ic); 261a6d42e7dSPeter Dunlap if (rc != IDM_STATUS_SUCCESS) { 262a6d42e7dSPeter Dunlap return (ic->ic_conn_sm_status); 263a6d42e7dSPeter Dunlap } 264a6d42e7dSPeter Dunlap /* Kick state machine */ 265a6d42e7dSPeter Dunlap idm_conn_event(ic, CE_CONNECT_REQ, NULL); 266a6d42e7dSPeter Dunlap 267a6d42e7dSPeter Dunlap /* Wait for login flag */ 268a6d42e7dSPeter Dunlap mutex_enter(&ic->ic_state_mutex); 269a6d42e7dSPeter Dunlap while (!(ic->ic_state_flags & CF_LOGIN_READY) && 270a6d42e7dSPeter Dunlap !(ic->ic_state_flags & CF_ERROR)) { 271a6d42e7dSPeter Dunlap cv_wait(&ic->ic_state_cv, &ic->ic_state_mutex); 272a6d42e7dSPeter Dunlap } 273a6d42e7dSPeter Dunlap mutex_exit(&ic->ic_state_mutex); 274a6d42e7dSPeter Dunlap 275a6d42e7dSPeter Dunlap if (ic->ic_state_flags & CF_ERROR) { 276a6d42e7dSPeter Dunlap /* ic->ic_conn_sm_status will contains failure status */ 277a6d42e7dSPeter Dunlap return (ic->ic_conn_sm_status); 278a6d42e7dSPeter Dunlap } 279a6d42e7dSPeter Dunlap 280a6d42e7dSPeter Dunlap /* Ready to login */ 281a6d42e7dSPeter Dunlap ASSERT(ic->ic_state_flags & CF_LOGIN_READY); 282a6d42e7dSPeter Dunlap (void) idm_notify_client(ic, CN_READY_FOR_LOGIN, NULL); 283a6d42e7dSPeter Dunlap 284a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 285a6d42e7dSPeter Dunlap } 286a6d42e7dSPeter Dunlap 287a6d42e7dSPeter Dunlap /* 288a6d42e7dSPeter Dunlap * idm_ini_conn_sm_fini_task() 289a6d42e7dSPeter Dunlap * 290a6d42e7dSPeter Dunlap * Dispatch a thread on the global taskq to tear down an initiator connection's 291a6d42e7dSPeter Dunlap * state machine. Note: We cannot do this from the disconnect thread as we will 292a6d42e7dSPeter Dunlap * end up in a situation wherein the thread is running on a taskq that it then 293a6d42e7dSPeter Dunlap * attempts to destroy. 294a6d42e7dSPeter Dunlap */ 295a6d42e7dSPeter Dunlap static void 296a6d42e7dSPeter Dunlap idm_ini_conn_sm_fini_task(void *ic_void) 297a6d42e7dSPeter Dunlap { 298a6d42e7dSPeter Dunlap idm_conn_sm_fini((idm_conn_t *)ic_void); 299a6d42e7dSPeter Dunlap } 300a6d42e7dSPeter Dunlap 301a6d42e7dSPeter Dunlap /* 302a6d42e7dSPeter Dunlap * idm_ini_conn_disconnect 303a6d42e7dSPeter Dunlap * 304a6d42e7dSPeter Dunlap * Forces a connection (previously established using idm_ini_conn_connect) 305a6d42e7dSPeter Dunlap * to perform a controlled shutdown, cleaning up any outstanding requests. 306a6d42e7dSPeter Dunlap * 307a6d42e7dSPeter Dunlap * ic - idm_conn_t structure representing the relevant connection 308a6d42e7dSPeter Dunlap * 309a6d42e7dSPeter Dunlap * This is synchronous and it will return when the connection has been 310a6d42e7dSPeter Dunlap * properly shutdown. 311a6d42e7dSPeter Dunlap */ 312a6d42e7dSPeter Dunlap /* ARGSUSED */ 313a6d42e7dSPeter Dunlap void 314a6d42e7dSPeter Dunlap idm_ini_conn_disconnect(idm_conn_t *ic) 315a6d42e7dSPeter Dunlap { 316a6d42e7dSPeter Dunlap mutex_enter(&ic->ic_state_mutex); 317a6d42e7dSPeter Dunlap 318a6d42e7dSPeter Dunlap if (ic->ic_state_flags == 0) { 319a6d42e7dSPeter Dunlap /* already disconnected */ 320a6d42e7dSPeter Dunlap mutex_exit(&ic->ic_state_mutex); 321a6d42e7dSPeter Dunlap return; 322a6d42e7dSPeter Dunlap } 323a6d42e7dSPeter Dunlap ic->ic_state_flags = 0; 324a6d42e7dSPeter Dunlap ic->ic_conn_sm_status = 0; 325a6d42e7dSPeter Dunlap mutex_exit(&ic->ic_state_mutex); 326a6d42e7dSPeter Dunlap 327a6d42e7dSPeter Dunlap /* invoke the transport-specific conn_destroy */ 328a6d42e7dSPeter Dunlap (void) ic->ic_transport_ops->it_ini_conn_disconnect(ic); 329a6d42e7dSPeter Dunlap 330a6d42e7dSPeter Dunlap /* teardown the connection sm */ 331a6d42e7dSPeter Dunlap (void) taskq_dispatch(idm.idm_global_taskq, &idm_ini_conn_sm_fini_task, 332a6d42e7dSPeter Dunlap (void *)ic, TQ_SLEEP); 333a6d42e7dSPeter Dunlap } 334a6d42e7dSPeter Dunlap 335a6d42e7dSPeter Dunlap /* 336a6d42e7dSPeter Dunlap * idm_tgt_svc_create 337a6d42e7dSPeter Dunlap * 338a6d42e7dSPeter Dunlap * The target calls this service to obtain a service context for each available 339a6d42e7dSPeter Dunlap * transport, starting a service of each type related to the IP address and port 340a6d42e7dSPeter Dunlap * passed. The idm_svc_req_t contains the service parameters. 341a6d42e7dSPeter Dunlap */ 342a6d42e7dSPeter Dunlap idm_status_t 343a6d42e7dSPeter Dunlap idm_tgt_svc_create(idm_svc_req_t *sr, idm_svc_t **new_svc) 344a6d42e7dSPeter Dunlap { 345a6d42e7dSPeter Dunlap idm_transport_type_t type; 346a6d42e7dSPeter Dunlap idm_transport_t *it; 347a6d42e7dSPeter Dunlap idm_svc_t *is; 348a6d42e7dSPeter Dunlap int rc; 349a6d42e7dSPeter Dunlap 350a6d42e7dSPeter Dunlap *new_svc = NULL; 351a6d42e7dSPeter Dunlap is = kmem_zalloc(sizeof (idm_svc_t), KM_SLEEP); 352a6d42e7dSPeter Dunlap 353a6d42e7dSPeter Dunlap /* Initialize transport-agnostic components of the service handle */ 354a6d42e7dSPeter Dunlap is->is_svc_req = *sr; 355a6d42e7dSPeter Dunlap mutex_init(&is->is_mutex, NULL, MUTEX_DEFAULT, NULL); 356a6d42e7dSPeter Dunlap cv_init(&is->is_cv, NULL, CV_DEFAULT, NULL); 357a6d42e7dSPeter Dunlap mutex_init(&is->is_count_mutex, NULL, MUTEX_DEFAULT, NULL); 358a6d42e7dSPeter Dunlap cv_init(&is->is_count_cv, NULL, CV_DEFAULT, NULL); 359a6d42e7dSPeter Dunlap idm_refcnt_init(&is->is_refcnt, is); 360a6d42e7dSPeter Dunlap 361a6d42e7dSPeter Dunlap /* 362a6d42e7dSPeter Dunlap * Make sure all available transports are setup. We call this now 363a6d42e7dSPeter Dunlap * instead of at initialization time in case IB has become available 364a6d42e7dSPeter Dunlap * since we started (hotplug, etc). 365a6d42e7dSPeter Dunlap */ 366a6d42e7dSPeter Dunlap idm_transport_setup(sr->sr_li); 367a6d42e7dSPeter Dunlap 368a6d42e7dSPeter Dunlap /* 369a6d42e7dSPeter Dunlap * Loop through the transports, configuring the transport-specific 370a6d42e7dSPeter Dunlap * components of each one. 371a6d42e7dSPeter Dunlap */ 372a6d42e7dSPeter Dunlap for (type = 0; type < IDM_TRANSPORT_NUM_TYPES; type++) { 373a6d42e7dSPeter Dunlap 374a6d42e7dSPeter Dunlap it = &idm_transport_list[type]; 375a6d42e7dSPeter Dunlap /* 376a6d42e7dSPeter Dunlap * If it_ops is NULL then the transport is unconfigured 377a6d42e7dSPeter Dunlap * and we shouldn't try to start the service. 378a6d42e7dSPeter Dunlap */ 379a6d42e7dSPeter Dunlap if (it->it_ops == NULL) { 380a6d42e7dSPeter Dunlap continue; 381a6d42e7dSPeter Dunlap } 382a6d42e7dSPeter Dunlap 383a6d42e7dSPeter Dunlap rc = it->it_ops->it_tgt_svc_create(sr, is); 384a6d42e7dSPeter Dunlap if (rc != IDM_STATUS_SUCCESS) { 385a6d42e7dSPeter Dunlap /* Teardown any configured services */ 386a6d42e7dSPeter Dunlap while (type--) { 387a6d42e7dSPeter Dunlap it = &idm_transport_list[type]; 388a6d42e7dSPeter Dunlap if (it->it_ops == NULL) { 389a6d42e7dSPeter Dunlap continue; 390a6d42e7dSPeter Dunlap } 391a6d42e7dSPeter Dunlap it->it_ops->it_tgt_svc_destroy(is); 392a6d42e7dSPeter Dunlap } 393a6d42e7dSPeter Dunlap /* Free the svc context and return */ 394a6d42e7dSPeter Dunlap kmem_free(is, sizeof (idm_svc_t)); 395a6d42e7dSPeter Dunlap return (rc); 396a6d42e7dSPeter Dunlap } 397a6d42e7dSPeter Dunlap } 398a6d42e7dSPeter Dunlap 399a6d42e7dSPeter Dunlap *new_svc = is; 400a6d42e7dSPeter Dunlap 401a6d42e7dSPeter Dunlap mutex_enter(&idm.idm_global_mutex); 402a6d42e7dSPeter Dunlap list_insert_tail(&idm.idm_tgt_svc_list, is); 403a6d42e7dSPeter Dunlap mutex_exit(&idm.idm_global_mutex); 404a6d42e7dSPeter Dunlap 405a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 406a6d42e7dSPeter Dunlap } 407a6d42e7dSPeter Dunlap 408a6d42e7dSPeter Dunlap /* 409a6d42e7dSPeter Dunlap * idm_tgt_svc_destroy 410a6d42e7dSPeter Dunlap * 411a6d42e7dSPeter Dunlap * is - idm_svc_t returned by the call to idm_tgt_svc_create 412a6d42e7dSPeter Dunlap * 413a6d42e7dSPeter Dunlap * Cleanup any resources associated with the idm_svc_t. 414a6d42e7dSPeter Dunlap */ 415a6d42e7dSPeter Dunlap void 416a6d42e7dSPeter Dunlap idm_tgt_svc_destroy(idm_svc_t *is) 417a6d42e7dSPeter Dunlap { 418a6d42e7dSPeter Dunlap idm_transport_type_t type; 419a6d42e7dSPeter Dunlap idm_transport_t *it; 420a6d42e7dSPeter Dunlap 421a6d42e7dSPeter Dunlap mutex_enter(&idm.idm_global_mutex); 422a6d42e7dSPeter Dunlap /* remove this service from the global list */ 423a6d42e7dSPeter Dunlap list_remove(&idm.idm_tgt_svc_list, is); 424a6d42e7dSPeter Dunlap /* wakeup any waiters for service change */ 425a6d42e7dSPeter Dunlap cv_broadcast(&idm.idm_tgt_svc_cv); 426a6d42e7dSPeter Dunlap mutex_exit(&idm.idm_global_mutex); 427a6d42e7dSPeter Dunlap 428a6d42e7dSPeter Dunlap /* tear down the svc resources */ 429a6d42e7dSPeter Dunlap idm_refcnt_destroy(&is->is_refcnt); 430a6d42e7dSPeter Dunlap cv_destroy(&is->is_count_cv); 431a6d42e7dSPeter Dunlap mutex_destroy(&is->is_count_mutex); 432a6d42e7dSPeter Dunlap cv_destroy(&is->is_cv); 433a6d42e7dSPeter Dunlap mutex_destroy(&is->is_mutex); 434a6d42e7dSPeter Dunlap 435a6d42e7dSPeter Dunlap /* teardown each transport-specific service */ 436a6d42e7dSPeter Dunlap for (type = 0; type < IDM_TRANSPORT_NUM_TYPES; type++) { 437a6d42e7dSPeter Dunlap it = &idm_transport_list[type]; 438a6d42e7dSPeter Dunlap if (it->it_ops == NULL) { 439a6d42e7dSPeter Dunlap continue; 440a6d42e7dSPeter Dunlap } 441a6d42e7dSPeter Dunlap 442a6d42e7dSPeter Dunlap it->it_ops->it_tgt_svc_destroy(is); 443a6d42e7dSPeter Dunlap } 444a6d42e7dSPeter Dunlap 445a6d42e7dSPeter Dunlap /* free the svc handle */ 446a6d42e7dSPeter Dunlap kmem_free(is, sizeof (idm_svc_t)); 447a6d42e7dSPeter Dunlap } 448a6d42e7dSPeter Dunlap 449a6d42e7dSPeter Dunlap void 450a6d42e7dSPeter Dunlap idm_tgt_svc_hold(idm_svc_t *is) 451a6d42e7dSPeter Dunlap { 452a6d42e7dSPeter Dunlap idm_refcnt_hold(&is->is_refcnt); 453a6d42e7dSPeter Dunlap } 454a6d42e7dSPeter Dunlap 455a6d42e7dSPeter Dunlap void 456a6d42e7dSPeter Dunlap idm_tgt_svc_rele_and_destroy(idm_svc_t *is) 457a6d42e7dSPeter Dunlap { 458a6d42e7dSPeter Dunlap idm_refcnt_rele_and_destroy(&is->is_refcnt, 459a6d42e7dSPeter Dunlap (idm_refcnt_cb_t *)&idm_tgt_svc_destroy); 460a6d42e7dSPeter Dunlap } 461a6d42e7dSPeter Dunlap 462a6d42e7dSPeter Dunlap /* 463a6d42e7dSPeter Dunlap * idm_tgt_svc_online 464a6d42e7dSPeter Dunlap * 465a6d42e7dSPeter Dunlap * is - idm_svc_t returned by the call to idm_tgt_svc_create 466a6d42e7dSPeter Dunlap * 467a6d42e7dSPeter Dunlap * Online each transport service, as we want this target to be accessible 468a6d42e7dSPeter Dunlap * via any configured transport. 469a6d42e7dSPeter Dunlap * 470a6d42e7dSPeter Dunlap * When the initiator establishes a new connection to the target, IDM will 471a6d42e7dSPeter Dunlap * call the "new connect" callback defined in the idm_svc_req_t structure 472a6d42e7dSPeter Dunlap * and it will pass an idm_conn_t structure representing that new connection. 473a6d42e7dSPeter Dunlap */ 474a6d42e7dSPeter Dunlap idm_status_t 475a6d42e7dSPeter Dunlap idm_tgt_svc_online(idm_svc_t *is) 476a6d42e7dSPeter Dunlap { 477a6d42e7dSPeter Dunlap 478a6d42e7dSPeter Dunlap idm_transport_type_t type; 479a6d42e7dSPeter Dunlap idm_transport_t *it; 480a6d42e7dSPeter Dunlap int rc; 481a6d42e7dSPeter Dunlap int svc_found; 482a6d42e7dSPeter Dunlap 483a6d42e7dSPeter Dunlap mutex_enter(&is->is_mutex); 484a6d42e7dSPeter Dunlap /* Walk through each of the transports and online them */ 485a6d42e7dSPeter Dunlap if (is->is_online == 0) { 486a6d42e7dSPeter Dunlap svc_found = 0; 487a6d42e7dSPeter Dunlap for (type = 0; type < IDM_TRANSPORT_NUM_TYPES; type++) { 488a6d42e7dSPeter Dunlap it = &idm_transport_list[type]; 489a6d42e7dSPeter Dunlap if (it->it_ops == NULL) { 490a6d42e7dSPeter Dunlap /* transport is not registered */ 491a6d42e7dSPeter Dunlap continue; 492a6d42e7dSPeter Dunlap } 493a6d42e7dSPeter Dunlap 494a6d42e7dSPeter Dunlap mutex_exit(&is->is_mutex); 495a6d42e7dSPeter Dunlap rc = it->it_ops->it_tgt_svc_online(is); 496a6d42e7dSPeter Dunlap mutex_enter(&is->is_mutex); 497a6d42e7dSPeter Dunlap if (rc == IDM_STATUS_SUCCESS) { 498a6d42e7dSPeter Dunlap /* We have at least one service running. */ 499a6d42e7dSPeter Dunlap svc_found = 1; 500a6d42e7dSPeter Dunlap } 501a6d42e7dSPeter Dunlap } 502a6d42e7dSPeter Dunlap } else { 503a6d42e7dSPeter Dunlap svc_found = 1; 504a6d42e7dSPeter Dunlap } 505a6d42e7dSPeter Dunlap if (svc_found) 506a6d42e7dSPeter Dunlap is->is_online++; 507a6d42e7dSPeter Dunlap mutex_exit(&is->is_mutex); 508a6d42e7dSPeter Dunlap 509a6d42e7dSPeter Dunlap return (svc_found ? IDM_STATUS_SUCCESS : IDM_STATUS_FAIL); 510a6d42e7dSPeter Dunlap } 511a6d42e7dSPeter Dunlap 512a6d42e7dSPeter Dunlap /* 513a6d42e7dSPeter Dunlap * idm_tgt_svc_offline 514a6d42e7dSPeter Dunlap * 515a6d42e7dSPeter Dunlap * is - idm_svc_t returned by the call to idm_tgt_svc_create 516a6d42e7dSPeter Dunlap * 517a6d42e7dSPeter Dunlap * Shutdown any online target services. 518a6d42e7dSPeter Dunlap */ 519a6d42e7dSPeter Dunlap void 520a6d42e7dSPeter Dunlap idm_tgt_svc_offline(idm_svc_t *is) 521a6d42e7dSPeter Dunlap { 522a6d42e7dSPeter Dunlap idm_transport_type_t type; 523a6d42e7dSPeter Dunlap idm_transport_t *it; 524a6d42e7dSPeter Dunlap 525a6d42e7dSPeter Dunlap mutex_enter(&is->is_mutex); 526a6d42e7dSPeter Dunlap is->is_online--; 527a6d42e7dSPeter Dunlap if (is->is_online == 0) { 528a6d42e7dSPeter Dunlap /* Walk through each of the transports and offline them */ 529a6d42e7dSPeter Dunlap for (type = 0; type < IDM_TRANSPORT_NUM_TYPES; type++) { 530a6d42e7dSPeter Dunlap it = &idm_transport_list[type]; 531a6d42e7dSPeter Dunlap if (it->it_ops == NULL) { 532a6d42e7dSPeter Dunlap /* transport is not registered */ 533a6d42e7dSPeter Dunlap continue; 534a6d42e7dSPeter Dunlap } 535a6d42e7dSPeter Dunlap 536a6d42e7dSPeter Dunlap mutex_exit(&is->is_mutex); 537a6d42e7dSPeter Dunlap it->it_ops->it_tgt_svc_offline(is); 538a6d42e7dSPeter Dunlap mutex_enter(&is->is_mutex); 539a6d42e7dSPeter Dunlap } 540a6d42e7dSPeter Dunlap } 541a6d42e7dSPeter Dunlap mutex_exit(&is->is_mutex); 542a6d42e7dSPeter Dunlap } 543a6d42e7dSPeter Dunlap 544a6d42e7dSPeter Dunlap /* 545a6d42e7dSPeter Dunlap * idm_tgt_svc_lookup 546a6d42e7dSPeter Dunlap * 547a6d42e7dSPeter Dunlap * Lookup a service instance listening on the specified port 548a6d42e7dSPeter Dunlap */ 549a6d42e7dSPeter Dunlap 550a6d42e7dSPeter Dunlap idm_svc_t * 551a6d42e7dSPeter Dunlap idm_tgt_svc_lookup(uint16_t port) 552a6d42e7dSPeter Dunlap { 553a6d42e7dSPeter Dunlap idm_svc_t *result; 554a6d42e7dSPeter Dunlap 555a6d42e7dSPeter Dunlap retry: 556a6d42e7dSPeter Dunlap mutex_enter(&idm.idm_global_mutex); 557a6d42e7dSPeter Dunlap for (result = list_head(&idm.idm_tgt_svc_list); 558a6d42e7dSPeter Dunlap result != NULL; 559a6d42e7dSPeter Dunlap result = list_next(&idm.idm_tgt_svc_list, result)) { 560a6d42e7dSPeter Dunlap if (result->is_svc_req.sr_port == port) { 561a6d42e7dSPeter Dunlap if (result->is_online == 0) { 562a6d42e7dSPeter Dunlap /* 563a6d42e7dSPeter Dunlap * A service exists on this port, but it 564a6d42e7dSPeter Dunlap * is going away, wait for it to cleanup. 565a6d42e7dSPeter Dunlap */ 566a6d42e7dSPeter Dunlap cv_wait(&idm.idm_tgt_svc_cv, 567a6d42e7dSPeter Dunlap &idm.idm_global_mutex); 568a6d42e7dSPeter Dunlap mutex_exit(&idm.idm_global_mutex); 569a6d42e7dSPeter Dunlap goto retry; 570a6d42e7dSPeter Dunlap } 571a6d42e7dSPeter Dunlap idm_tgt_svc_hold(result); 572a6d42e7dSPeter Dunlap mutex_exit(&idm.idm_global_mutex); 573a6d42e7dSPeter Dunlap return (result); 574a6d42e7dSPeter Dunlap } 575a6d42e7dSPeter Dunlap } 576a6d42e7dSPeter Dunlap mutex_exit(&idm.idm_global_mutex); 577a6d42e7dSPeter Dunlap 578a6d42e7dSPeter Dunlap return (NULL); 579a6d42e7dSPeter Dunlap } 580a6d42e7dSPeter Dunlap 581a6d42e7dSPeter Dunlap /* 582a6d42e7dSPeter Dunlap * idm_negotiate_key_values() 583a6d42e7dSPeter Dunlap * Give IDM level a chance to negotiate any login parameters it should own. 584a6d42e7dSPeter Dunlap * -- leave unhandled parameters alone on request_nvl 585a6d42e7dSPeter Dunlap * -- move all handled parameters to response_nvl with an appropriate response 586a6d42e7dSPeter Dunlap * -- also add an entry to negotiated_nvl for any accepted parameters 587a6d42e7dSPeter Dunlap */ 588a6d42e7dSPeter Dunlap kv_status_t 589a6d42e7dSPeter Dunlap idm_negotiate_key_values(idm_conn_t *ic, nvlist_t *request_nvl, 590a6d42e7dSPeter Dunlap nvlist_t *response_nvl, nvlist_t *negotiated_nvl) 591a6d42e7dSPeter Dunlap { 592a6d42e7dSPeter Dunlap ASSERT(ic->ic_transport_ops != NULL); 593a6d42e7dSPeter Dunlap return (ic->ic_transport_ops->it_negotiate_key_values(ic, 594a6d42e7dSPeter Dunlap request_nvl, response_nvl, negotiated_nvl)); 595a6d42e7dSPeter Dunlap } 596a6d42e7dSPeter Dunlap 597a6d42e7dSPeter Dunlap /* 598a6d42e7dSPeter Dunlap * idm_notice_key_values() 599a6d42e7dSPeter Dunlap * Activate at the IDM level any parameters that have been negotiated. 600a6d42e7dSPeter Dunlap * Passes the set of key value pairs to the transport for activation. 601a6d42e7dSPeter Dunlap * This will be invoked as the connection is entering full-feature mode. 602a6d42e7dSPeter Dunlap */ 603a6d42e7dSPeter Dunlap idm_status_t 604a6d42e7dSPeter Dunlap idm_notice_key_values(idm_conn_t *ic, nvlist_t *negotiated_nvl) 605a6d42e7dSPeter Dunlap { 606a6d42e7dSPeter Dunlap ASSERT(ic->ic_transport_ops != NULL); 607a6d42e7dSPeter Dunlap return (ic->ic_transport_ops->it_notice_key_values(ic, 608a6d42e7dSPeter Dunlap negotiated_nvl)); 609a6d42e7dSPeter Dunlap } 610a6d42e7dSPeter Dunlap 611a6d42e7dSPeter Dunlap /* 612a6d42e7dSPeter Dunlap * idm_buf_tx_to_ini 613a6d42e7dSPeter Dunlap * 614a6d42e7dSPeter Dunlap * This is IDM's implementation of the 'Put_Data' operational primitive. 615a6d42e7dSPeter Dunlap * 616a6d42e7dSPeter Dunlap * This function is invoked by a target iSCSI layer to request its local 617a6d42e7dSPeter Dunlap * Datamover layer to transmit the Data-In PDU to the peer iSCSI layer 618a6d42e7dSPeter Dunlap * on the remote iSCSI node. The I/O buffer represented by 'idb' is 619a6d42e7dSPeter Dunlap * transferred to the initiator associated with task 'idt'. The connection 620a6d42e7dSPeter Dunlap * info, contents of the Data-In PDU header, the DataDescriptorIn, BHS, 621a6d42e7dSPeter Dunlap * and the callback (idb->idb_buf_cb) at transfer completion are 622a6d42e7dSPeter Dunlap * provided as input. 623a6d42e7dSPeter Dunlap * 624a6d42e7dSPeter Dunlap * This data transfer takes place transparently to the remote iSCSI layer, 625a6d42e7dSPeter Dunlap * i.e. without its participation. 626a6d42e7dSPeter Dunlap * 627a6d42e7dSPeter Dunlap * Using sockets, IDM implements the data transfer by segmenting the data 628a6d42e7dSPeter Dunlap * buffer into appropriately sized iSCSI PDUs and transmitting them to the 629a6d42e7dSPeter Dunlap * initiator. iSER performs the transfer using RDMA write. 630a6d42e7dSPeter Dunlap * 631a6d42e7dSPeter Dunlap */ 632a6d42e7dSPeter Dunlap idm_status_t 633a6d42e7dSPeter Dunlap idm_buf_tx_to_ini(idm_task_t *idt, idm_buf_t *idb, 634a6d42e7dSPeter Dunlap uint32_t offset, uint32_t xfer_len, 635a6d42e7dSPeter Dunlap idm_buf_cb_t idb_buf_cb, void *cb_arg) 636a6d42e7dSPeter Dunlap { 637a6d42e7dSPeter Dunlap idm_status_t rc; 638a6d42e7dSPeter Dunlap 639a6d42e7dSPeter Dunlap idb->idb_bufoffset = offset; 640a6d42e7dSPeter Dunlap idb->idb_xfer_len = xfer_len; 641a6d42e7dSPeter Dunlap idb->idb_buf_cb = idb_buf_cb; 642a6d42e7dSPeter Dunlap idb->idb_cb_arg = cb_arg; 643a6d42e7dSPeter Dunlap 644a6d42e7dSPeter Dunlap mutex_enter(&idt->idt_mutex); 645a6d42e7dSPeter Dunlap switch (idt->idt_state) { 646a6d42e7dSPeter Dunlap case TASK_ACTIVE: 647a6d42e7dSPeter Dunlap idt->idt_tx_to_ini_start++; 648a6d42e7dSPeter Dunlap idm_task_hold(idt); 649a6d42e7dSPeter Dunlap idm_buf_bind_in_locked(idt, idb); 650a6d42e7dSPeter Dunlap idb->idb_in_transport = B_TRUE; 651a6d42e7dSPeter Dunlap rc = (*idt->idt_ic->ic_transport_ops->it_buf_tx_to_ini) 652a6d42e7dSPeter Dunlap (idt, idb); 653a6d42e7dSPeter Dunlap return (rc); 654a6d42e7dSPeter Dunlap 655a6d42e7dSPeter Dunlap case TASK_SUSPENDING: 656a6d42e7dSPeter Dunlap case TASK_SUSPENDED: 657a6d42e7dSPeter Dunlap /* 658a6d42e7dSPeter Dunlap * Bind buffer but don't start a transfer since the task 659a6d42e7dSPeter Dunlap * is suspended 660a6d42e7dSPeter Dunlap */ 661a6d42e7dSPeter Dunlap idm_buf_bind_in_locked(idt, idb); 662a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 663a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 664a6d42e7dSPeter Dunlap 665a6d42e7dSPeter Dunlap case TASK_ABORTING: 666a6d42e7dSPeter Dunlap case TASK_ABORTED: 667a6d42e7dSPeter Dunlap /* 668a6d42e7dSPeter Dunlap * Once the task is aborted, any buffers added to the 669a6d42e7dSPeter Dunlap * idt_inbufv will never get cleaned up, so just return 670a6d42e7dSPeter Dunlap * SUCCESS. The buffer should get cleaned up by the 671a6d42e7dSPeter Dunlap * client or framework once task_aborted has completed. 672a6d42e7dSPeter Dunlap */ 673a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 674a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 675a6d42e7dSPeter Dunlap 676a6d42e7dSPeter Dunlap default: 677a6d42e7dSPeter Dunlap ASSERT(0); 678a6d42e7dSPeter Dunlap break; 679a6d42e7dSPeter Dunlap } 680a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 681a6d42e7dSPeter Dunlap 682a6d42e7dSPeter Dunlap return (IDM_STATUS_FAIL); 683a6d42e7dSPeter Dunlap } 684a6d42e7dSPeter Dunlap 685a6d42e7dSPeter Dunlap /* 686a6d42e7dSPeter Dunlap * idm_buf_rx_from_ini 687a6d42e7dSPeter Dunlap * 688a6d42e7dSPeter Dunlap * This is IDM's implementation of the 'Get_Data' operational primitive. 689a6d42e7dSPeter Dunlap * 690a6d42e7dSPeter Dunlap * This function is invoked by a target iSCSI layer to request its local 691a6d42e7dSPeter Dunlap * Datamover layer to retrieve certain data identified by the R2T PDU from the 692a6d42e7dSPeter Dunlap * peer iSCSI layer on the remote node. The retrieved Data-Out PDU will be 693a6d42e7dSPeter Dunlap * mapped to the respective buffer by the task tags (ITT & TTT). 694a6d42e7dSPeter Dunlap * The connection information, contents of an R2T PDU, DataDescriptor, BHS, and 695a6d42e7dSPeter Dunlap * the callback (idb->idb_buf_cb) notification for data transfer completion are 696a6d42e7dSPeter Dunlap * are provided as input. 697a6d42e7dSPeter Dunlap * 698a6d42e7dSPeter Dunlap * When an iSCSI node sends an R2T PDU to its local Datamover layer, the local 699a6d42e7dSPeter Dunlap * Datamover layer, the local and remote Datamover layers transparently bring 700a6d42e7dSPeter Dunlap * about the data transfer requested by the R2T PDU, without the participation 701a6d42e7dSPeter Dunlap * of the iSCSI layers. 702a6d42e7dSPeter Dunlap * 703a6d42e7dSPeter Dunlap * Using sockets, IDM transmits an R2T PDU for each buffer and the rx_data_out() 704a6d42e7dSPeter Dunlap * assembles the Data-Out PDUs into the buffer. iSER uses RDMA read. 705a6d42e7dSPeter Dunlap * 706a6d42e7dSPeter Dunlap */ 707a6d42e7dSPeter Dunlap idm_status_t 708a6d42e7dSPeter Dunlap idm_buf_rx_from_ini(idm_task_t *idt, idm_buf_t *idb, 709a6d42e7dSPeter Dunlap uint32_t offset, uint32_t xfer_len, 710a6d42e7dSPeter Dunlap idm_buf_cb_t idb_buf_cb, void *cb_arg) 711a6d42e7dSPeter Dunlap { 712a6d42e7dSPeter Dunlap idm_status_t rc; 713a6d42e7dSPeter Dunlap 714a6d42e7dSPeter Dunlap idb->idb_bufoffset = offset; 715a6d42e7dSPeter Dunlap idb->idb_xfer_len = xfer_len; 716a6d42e7dSPeter Dunlap idb->idb_buf_cb = idb_buf_cb; 717a6d42e7dSPeter Dunlap idb->idb_cb_arg = cb_arg; 718a6d42e7dSPeter Dunlap 719a6d42e7dSPeter Dunlap /* 720a6d42e7dSPeter Dunlap * "In" buf list is for "Data In" PDU's, "Out" buf list is for 721a6d42e7dSPeter Dunlap * "Data Out" PDU's 722a6d42e7dSPeter Dunlap */ 723a6d42e7dSPeter Dunlap mutex_enter(&idt->idt_mutex); 724a6d42e7dSPeter Dunlap switch (idt->idt_state) { 725a6d42e7dSPeter Dunlap case TASK_ACTIVE: 726a6d42e7dSPeter Dunlap idt->idt_rx_from_ini_start++; 727a6d42e7dSPeter Dunlap idm_task_hold(idt); 728a6d42e7dSPeter Dunlap idm_buf_bind_out_locked(idt, idb); 729a6d42e7dSPeter Dunlap idb->idb_in_transport = B_TRUE; 730a6d42e7dSPeter Dunlap rc = (*idt->idt_ic->ic_transport_ops->it_buf_rx_from_ini) 731a6d42e7dSPeter Dunlap (idt, idb); 732a6d42e7dSPeter Dunlap return (rc); 733a6d42e7dSPeter Dunlap case TASK_SUSPENDING: 734a6d42e7dSPeter Dunlap case TASK_SUSPENDED: 735a6d42e7dSPeter Dunlap case TASK_ABORTING: 736a6d42e7dSPeter Dunlap case TASK_ABORTED: 737a6d42e7dSPeter Dunlap /* 738a6d42e7dSPeter Dunlap * Bind buffer but don't start a transfer since the task 739a6d42e7dSPeter Dunlap * is suspended 740a6d42e7dSPeter Dunlap */ 741a6d42e7dSPeter Dunlap idm_buf_bind_out_locked(idt, idb); 742a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 743a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 744a6d42e7dSPeter Dunlap default: 745a6d42e7dSPeter Dunlap ASSERT(0); 746a6d42e7dSPeter Dunlap break; 747a6d42e7dSPeter Dunlap } 748a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 749a6d42e7dSPeter Dunlap 750a6d42e7dSPeter Dunlap return (IDM_STATUS_FAIL); 751a6d42e7dSPeter Dunlap } 752a6d42e7dSPeter Dunlap 753a6d42e7dSPeter Dunlap /* 754a6d42e7dSPeter Dunlap * idm_buf_tx_to_ini_done 755a6d42e7dSPeter Dunlap * 756a6d42e7dSPeter Dunlap * The transport calls this after it has completed a transfer requested by 757a6d42e7dSPeter Dunlap * a call to transport_buf_tx_to_ini 758a6d42e7dSPeter Dunlap * 759a6d42e7dSPeter Dunlap * Caller holds idt->idt_mutex, idt->idt_mutex is released before returning. 760a6d42e7dSPeter Dunlap * idt may be freed after the call to idb->idb_buf_cb. 761a6d42e7dSPeter Dunlap */ 762a6d42e7dSPeter Dunlap void 763a6d42e7dSPeter Dunlap idm_buf_tx_to_ini_done(idm_task_t *idt, idm_buf_t *idb, idm_status_t status) 764a6d42e7dSPeter Dunlap { 765a6d42e7dSPeter Dunlap ASSERT(mutex_owned(&idt->idt_mutex)); 766a6d42e7dSPeter Dunlap idb->idb_in_transport = B_FALSE; 767a6d42e7dSPeter Dunlap idb->idb_tx_thread = B_FALSE; 768a6d42e7dSPeter Dunlap idt->idt_tx_to_ini_done++; 769a6d42e7dSPeter Dunlap 770a6d42e7dSPeter Dunlap /* 771a6d42e7dSPeter Dunlap * idm_refcnt_rele may cause TASK_SUSPENDING --> TASK_SUSPENDED or 772a6d42e7dSPeter Dunlap * TASK_ABORTING --> TASK_ABORTED transistion if the refcount goes 773a6d42e7dSPeter Dunlap * to 0. 774a6d42e7dSPeter Dunlap */ 775a6d42e7dSPeter Dunlap idm_task_rele(idt); 776a6d42e7dSPeter Dunlap idb->idb_status = status; 777a6d42e7dSPeter Dunlap 778a6d42e7dSPeter Dunlap switch (idt->idt_state) { 779a6d42e7dSPeter Dunlap case TASK_ACTIVE: 780a6d42e7dSPeter Dunlap idm_buf_unbind_in_locked(idt, idb); 781a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 782a6d42e7dSPeter Dunlap (*idb->idb_buf_cb)(idb, status); 783a6d42e7dSPeter Dunlap return; 784a6d42e7dSPeter Dunlap case TASK_SUSPENDING: 785a6d42e7dSPeter Dunlap case TASK_SUSPENDED: 786a6d42e7dSPeter Dunlap case TASK_ABORTING: 787a6d42e7dSPeter Dunlap case TASK_ABORTED: 788a6d42e7dSPeter Dunlap /* 789a6d42e7dSPeter Dunlap * To keep things simple we will ignore the case where the 790a6d42e7dSPeter Dunlap * transfer was successful and leave all buffers bound to the 791a6d42e7dSPeter Dunlap * task. This allows us to also ignore the case where we've 792a6d42e7dSPeter Dunlap * been asked to abort a task but the last transfer of the 793a6d42e7dSPeter Dunlap * task has completed. IDM has no idea whether this was, in 794a6d42e7dSPeter Dunlap * fact, the last transfer of the task so it would be difficult 795a6d42e7dSPeter Dunlap * to handle this case. Everything should get sorted out again 796a6d42e7dSPeter Dunlap * after task reassignment is complete. 797a6d42e7dSPeter Dunlap * 798a6d42e7dSPeter Dunlap * In the case of TASK_ABORTING we could conceivably call the 799a6d42e7dSPeter Dunlap * buffer callback here but the timing of when the client's 800a6d42e7dSPeter Dunlap * client_task_aborted callback is invoked vs. when the client's 801a6d42e7dSPeter Dunlap * buffer callback gets invoked gets sticky. We don't want 802a6d42e7dSPeter Dunlap * the client to here from us again after the call to 803a6d42e7dSPeter Dunlap * client_task_aborted() but we don't want to give it a bunch 804a6d42e7dSPeter Dunlap * of failed buffer transfers until we've called 805a6d42e7dSPeter Dunlap * client_task_aborted(). Instead we'll just leave all the 806a6d42e7dSPeter Dunlap * buffers bound and allow the client to cleanup. 807a6d42e7dSPeter Dunlap */ 808a6d42e7dSPeter Dunlap break; 809a6d42e7dSPeter Dunlap default: 810a6d42e7dSPeter Dunlap ASSERT(0); 811a6d42e7dSPeter Dunlap } 812a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 813a6d42e7dSPeter Dunlap } 814a6d42e7dSPeter Dunlap 815a6d42e7dSPeter Dunlap /* 816a6d42e7dSPeter Dunlap * idm_buf_rx_from_ini_done 817a6d42e7dSPeter Dunlap * 818a6d42e7dSPeter Dunlap * The transport calls this after it has completed a transfer requested by 819a6d42e7dSPeter Dunlap * a call totransport_buf_tx_to_ini 820a6d42e7dSPeter Dunlap * 821a6d42e7dSPeter Dunlap * Caller holds idt->idt_mutex, idt->idt_mutex is released before returning. 822a6d42e7dSPeter Dunlap * idt may be freed after the call to idb->idb_buf_cb. 823a6d42e7dSPeter Dunlap */ 824a6d42e7dSPeter Dunlap void 825a6d42e7dSPeter Dunlap idm_buf_rx_from_ini_done(idm_task_t *idt, idm_buf_t *idb, idm_status_t status) 826a6d42e7dSPeter Dunlap { 827a6d42e7dSPeter Dunlap ASSERT(mutex_owned(&idt->idt_mutex)); 828a6d42e7dSPeter Dunlap idb->idb_in_transport = B_FALSE; 829a6d42e7dSPeter Dunlap idt->idt_rx_from_ini_done++; 830a6d42e7dSPeter Dunlap 831a6d42e7dSPeter Dunlap /* 832a6d42e7dSPeter Dunlap * idm_refcnt_rele may cause TASK_SUSPENDING --> TASK_SUSPENDED or 833a6d42e7dSPeter Dunlap * TASK_ABORTING --> TASK_ABORTED transistion if the refcount goes 834a6d42e7dSPeter Dunlap * to 0. 835a6d42e7dSPeter Dunlap */ 836a6d42e7dSPeter Dunlap idm_task_rele(idt); 837a6d42e7dSPeter Dunlap idb->idb_status = status; 838a6d42e7dSPeter Dunlap 839a6d42e7dSPeter Dunlap switch (idt->idt_state) { 840a6d42e7dSPeter Dunlap case TASK_ACTIVE: 841a6d42e7dSPeter Dunlap idm_buf_unbind_out_locked(idt, idb); 842a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 843a6d42e7dSPeter Dunlap (*idb->idb_buf_cb)(idb, status); 844a6d42e7dSPeter Dunlap return; 845a6d42e7dSPeter Dunlap case TASK_SUSPENDING: 846a6d42e7dSPeter Dunlap case TASK_SUSPENDED: 847a6d42e7dSPeter Dunlap case TASK_ABORTING: 848a6d42e7dSPeter Dunlap case TASK_ABORTED: 849a6d42e7dSPeter Dunlap /* 850a6d42e7dSPeter Dunlap * To keep things simple we will ignore the case where the 851a6d42e7dSPeter Dunlap * transfer was successful and leave all buffers bound to the 852a6d42e7dSPeter Dunlap * task. This allows us to also ignore the case where we've 853a6d42e7dSPeter Dunlap * been asked to abort a task but the last transfer of the 854a6d42e7dSPeter Dunlap * task has completed. IDM has no idea whether this was, in 855a6d42e7dSPeter Dunlap * fact, the last transfer of the task so it would be difficult 856a6d42e7dSPeter Dunlap * to handle this case. Everything should get sorted out again 857a6d42e7dSPeter Dunlap * after task reassignment is complete. 858a6d42e7dSPeter Dunlap * 859a6d42e7dSPeter Dunlap * In the case of TASK_ABORTING we could conceivably call the 860a6d42e7dSPeter Dunlap * buffer callback here but the timing of when the client's 861a6d42e7dSPeter Dunlap * client_task_aborted callback is invoked vs. when the client's 862a6d42e7dSPeter Dunlap * buffer callback gets invoked gets sticky. We don't want 863a6d42e7dSPeter Dunlap * the client to here from us again after the call to 864a6d42e7dSPeter Dunlap * client_task_aborted() but we don't want to give it a bunch 865a6d42e7dSPeter Dunlap * of failed buffer transfers until we've called 866a6d42e7dSPeter Dunlap * client_task_aborted(). Instead we'll just leave all the 867a6d42e7dSPeter Dunlap * buffers bound and allow the client to cleanup. 868a6d42e7dSPeter Dunlap */ 869a6d42e7dSPeter Dunlap break; 870a6d42e7dSPeter Dunlap default: 871a6d42e7dSPeter Dunlap ASSERT(0); 872a6d42e7dSPeter Dunlap } 873a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 874a6d42e7dSPeter Dunlap } 875a6d42e7dSPeter Dunlap 876a6d42e7dSPeter Dunlap /* 877a6d42e7dSPeter Dunlap * idm_buf_alloc 878a6d42e7dSPeter Dunlap * 879a6d42e7dSPeter Dunlap * Allocates a buffer handle and registers it for use with the transport 880a6d42e7dSPeter Dunlap * layer. If a buffer is not passed on bufptr, the buffer will be allocated 881a6d42e7dSPeter Dunlap * as well as the handle. 882a6d42e7dSPeter Dunlap * 883a6d42e7dSPeter Dunlap * ic - connection on which the buffer will be transferred 884a6d42e7dSPeter Dunlap * bufptr - allocate memory for buffer if NULL, else assign to buffer 885a6d42e7dSPeter Dunlap * buflen - length of buffer 886a6d42e7dSPeter Dunlap * 887a6d42e7dSPeter Dunlap * Returns idm_buf_t handle if successful, otherwise NULL 888a6d42e7dSPeter Dunlap */ 889a6d42e7dSPeter Dunlap idm_buf_t * 890a6d42e7dSPeter Dunlap idm_buf_alloc(idm_conn_t *ic, void *bufptr, uint64_t buflen) 891a6d42e7dSPeter Dunlap { 892a6d42e7dSPeter Dunlap idm_buf_t *buf = NULL; 893a6d42e7dSPeter Dunlap int rc; 894a6d42e7dSPeter Dunlap 895a6d42e7dSPeter Dunlap ASSERT(ic != NULL); 896a6d42e7dSPeter Dunlap ASSERT(idm.idm_buf_cache != NULL); 897a6d42e7dSPeter Dunlap ASSERT(buflen > 0); 898a6d42e7dSPeter Dunlap 899a6d42e7dSPeter Dunlap /* Don't allocate new buffers if we are not in FFP */ 900a6d42e7dSPeter Dunlap mutex_enter(&ic->ic_state_mutex); 901a6d42e7dSPeter Dunlap if (!ic->ic_ffp) { 902a6d42e7dSPeter Dunlap mutex_exit(&ic->ic_state_mutex); 903a6d42e7dSPeter Dunlap return (NULL); 904a6d42e7dSPeter Dunlap } 905a6d42e7dSPeter Dunlap 906a6d42e7dSPeter Dunlap 907a6d42e7dSPeter Dunlap idm_conn_hold(ic); 908a6d42e7dSPeter Dunlap mutex_exit(&ic->ic_state_mutex); 909a6d42e7dSPeter Dunlap 910a6d42e7dSPeter Dunlap buf = kmem_cache_alloc(idm.idm_buf_cache, KM_NOSLEEP); 911a6d42e7dSPeter Dunlap if (buf == NULL) { 912a6d42e7dSPeter Dunlap idm_conn_rele(ic); 913a6d42e7dSPeter Dunlap return (NULL); 914a6d42e7dSPeter Dunlap } 915a6d42e7dSPeter Dunlap 916a6d42e7dSPeter Dunlap buf->idb_ic = ic; 917a6d42e7dSPeter Dunlap buf->idb_buflen = buflen; 918a6d42e7dSPeter Dunlap buf->idb_exp_offset = 0; 919a6d42e7dSPeter Dunlap buf->idb_bufoffset = 0; 920a6d42e7dSPeter Dunlap buf->idb_xfer_len = 0; 921a6d42e7dSPeter Dunlap buf->idb_magic = IDM_BUF_MAGIC; 922a6d42e7dSPeter Dunlap 923a6d42e7dSPeter Dunlap /* 924a6d42e7dSPeter Dunlap * If bufptr is NULL, we have an implicit request to allocate 925a6d42e7dSPeter Dunlap * memory for this IDM buffer handle and register it for use 926a6d42e7dSPeter Dunlap * with the transport. To simplify this, and to give more freedom 927a6d42e7dSPeter Dunlap * to the transport layer for it's own buffer management, both of 928a6d42e7dSPeter Dunlap * these actions will take place in the transport layer. 929a6d42e7dSPeter Dunlap * If bufptr is set, then the caller has allocated memory (or more 930a6d42e7dSPeter Dunlap * likely it's been passed from an upper layer), and we need only 931a6d42e7dSPeter Dunlap * register the buffer for use with the transport layer. 932a6d42e7dSPeter Dunlap */ 933a6d42e7dSPeter Dunlap if (bufptr == NULL) { 934a6d42e7dSPeter Dunlap /* 935a6d42e7dSPeter Dunlap * Allocate a buffer from the transport layer (which 936a6d42e7dSPeter Dunlap * will also register the buffer for use). 937a6d42e7dSPeter Dunlap */ 938a6d42e7dSPeter Dunlap rc = ic->ic_transport_ops->it_buf_alloc(buf, buflen); 939a6d42e7dSPeter Dunlap if (rc != 0) { 940a6d42e7dSPeter Dunlap idm_conn_rele(ic); 941a6d42e7dSPeter Dunlap kmem_cache_free(idm.idm_buf_cache, buf); 942a6d42e7dSPeter Dunlap return (NULL); 943a6d42e7dSPeter Dunlap } 944a6d42e7dSPeter Dunlap /* Set the bufalloc'd flag */ 945a6d42e7dSPeter Dunlap buf->idb_bufalloc = B_TRUE; 946a6d42e7dSPeter Dunlap } else { 947a6d42e7dSPeter Dunlap /* 948a6d42e7dSPeter Dunlap * Set the passed bufptr into the buf handle, and 949a6d42e7dSPeter Dunlap * register the handle with the transport layer. 950a6d42e7dSPeter Dunlap */ 951a6d42e7dSPeter Dunlap buf->idb_buf = bufptr; 952a6d42e7dSPeter Dunlap 953a6d42e7dSPeter Dunlap rc = ic->ic_transport_ops->it_buf_setup(buf); 954a6d42e7dSPeter Dunlap if (rc != 0) { 955a6d42e7dSPeter Dunlap idm_conn_rele(ic); 956a6d42e7dSPeter Dunlap kmem_cache_free(idm.idm_buf_cache, buf); 957a6d42e7dSPeter Dunlap return (NULL); 958a6d42e7dSPeter Dunlap } 959a6d42e7dSPeter Dunlap /* Ensure bufalloc'd flag is unset */ 960a6d42e7dSPeter Dunlap buf->idb_bufalloc = B_FALSE; 961a6d42e7dSPeter Dunlap } 962a6d42e7dSPeter Dunlap 963a6d42e7dSPeter Dunlap return (buf); 964a6d42e7dSPeter Dunlap 965a6d42e7dSPeter Dunlap } 966a6d42e7dSPeter Dunlap 967a6d42e7dSPeter Dunlap /* 968a6d42e7dSPeter Dunlap * idm_buf_free 969a6d42e7dSPeter Dunlap * 970a6d42e7dSPeter Dunlap * Release a buffer handle along with the associated buffer that was allocated 971a6d42e7dSPeter Dunlap * or assigned with idm_buf_alloc 972a6d42e7dSPeter Dunlap */ 973a6d42e7dSPeter Dunlap void 974a6d42e7dSPeter Dunlap idm_buf_free(idm_buf_t *buf) 975a6d42e7dSPeter Dunlap { 976a6d42e7dSPeter Dunlap idm_conn_t *ic = buf->idb_ic; 977a6d42e7dSPeter Dunlap 978a6d42e7dSPeter Dunlap 979a6d42e7dSPeter Dunlap buf->idb_task_binding = NULL; 980a6d42e7dSPeter Dunlap 981a6d42e7dSPeter Dunlap if (buf->idb_bufalloc) { 982a6d42e7dSPeter Dunlap ic->ic_transport_ops->it_buf_free(buf); 983a6d42e7dSPeter Dunlap } else { 984a6d42e7dSPeter Dunlap ic->ic_transport_ops->it_buf_teardown(buf); 985a6d42e7dSPeter Dunlap } 986a6d42e7dSPeter Dunlap kmem_cache_free(idm.idm_buf_cache, buf); 987a6d42e7dSPeter Dunlap idm_conn_rele(ic); 988a6d42e7dSPeter Dunlap } 989a6d42e7dSPeter Dunlap 990a6d42e7dSPeter Dunlap /* 991a6d42e7dSPeter Dunlap * idm_buf_bind_in 992a6d42e7dSPeter Dunlap * 993a6d42e7dSPeter Dunlap * This function associates a buffer with a task. This is only for use by the 994a6d42e7dSPeter Dunlap * iSCSI initiator that will have only one buffer per transfer direction 995a6d42e7dSPeter Dunlap * 996a6d42e7dSPeter Dunlap */ 997a6d42e7dSPeter Dunlap void 998a6d42e7dSPeter Dunlap idm_buf_bind_in(idm_task_t *idt, idm_buf_t *buf) 999a6d42e7dSPeter Dunlap { 1000a6d42e7dSPeter Dunlap mutex_enter(&idt->idt_mutex); 1001a6d42e7dSPeter Dunlap idm_buf_bind_in_locked(idt, buf); 1002a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1003a6d42e7dSPeter Dunlap } 1004a6d42e7dSPeter Dunlap 1005a6d42e7dSPeter Dunlap static void 1006a6d42e7dSPeter Dunlap idm_buf_bind_in_locked(idm_task_t *idt, idm_buf_t *buf) 1007a6d42e7dSPeter Dunlap { 1008a6d42e7dSPeter Dunlap buf->idb_task_binding = idt; 1009a6d42e7dSPeter Dunlap buf->idb_ic = idt->idt_ic; 1010a6d42e7dSPeter Dunlap idm_listbuf_insert(&idt->idt_inbufv, buf); 1011a6d42e7dSPeter Dunlap } 1012a6d42e7dSPeter Dunlap 1013a6d42e7dSPeter Dunlap void 1014a6d42e7dSPeter Dunlap idm_buf_bind_out(idm_task_t *idt, idm_buf_t *buf) 1015a6d42e7dSPeter Dunlap { 1016a6d42e7dSPeter Dunlap mutex_enter(&idt->idt_mutex); 1017a6d42e7dSPeter Dunlap idm_buf_bind_out_locked(idt, buf); 1018a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1019a6d42e7dSPeter Dunlap } 1020a6d42e7dSPeter Dunlap 1021a6d42e7dSPeter Dunlap static void 1022a6d42e7dSPeter Dunlap idm_buf_bind_out_locked(idm_task_t *idt, idm_buf_t *buf) 1023a6d42e7dSPeter Dunlap { 1024a6d42e7dSPeter Dunlap buf->idb_task_binding = idt; 1025a6d42e7dSPeter Dunlap buf->idb_ic = idt->idt_ic; 1026a6d42e7dSPeter Dunlap idm_listbuf_insert(&idt->idt_outbufv, buf); 1027a6d42e7dSPeter Dunlap } 1028a6d42e7dSPeter Dunlap 1029a6d42e7dSPeter Dunlap void 1030a6d42e7dSPeter Dunlap idm_buf_unbind_in(idm_task_t *idt, idm_buf_t *buf) 1031a6d42e7dSPeter Dunlap { 1032a6d42e7dSPeter Dunlap mutex_enter(&idt->idt_mutex); 1033a6d42e7dSPeter Dunlap idm_buf_unbind_in_locked(idt, buf); 1034a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1035a6d42e7dSPeter Dunlap } 1036a6d42e7dSPeter Dunlap 1037a6d42e7dSPeter Dunlap static void 1038a6d42e7dSPeter Dunlap idm_buf_unbind_in_locked(idm_task_t *idt, idm_buf_t *buf) 1039a6d42e7dSPeter Dunlap { 1040a6d42e7dSPeter Dunlap list_remove(&idt->idt_inbufv, buf); 1041a6d42e7dSPeter Dunlap } 1042a6d42e7dSPeter Dunlap 1043a6d42e7dSPeter Dunlap void 1044a6d42e7dSPeter Dunlap idm_buf_unbind_out(idm_task_t *idt, idm_buf_t *buf) 1045a6d42e7dSPeter Dunlap { 1046a6d42e7dSPeter Dunlap mutex_enter(&idt->idt_mutex); 1047a6d42e7dSPeter Dunlap idm_buf_unbind_out_locked(idt, buf); 1048a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1049a6d42e7dSPeter Dunlap } 1050a6d42e7dSPeter Dunlap 1051a6d42e7dSPeter Dunlap static void 1052a6d42e7dSPeter Dunlap idm_buf_unbind_out_locked(idm_task_t *idt, idm_buf_t *buf) 1053a6d42e7dSPeter Dunlap { 1054a6d42e7dSPeter Dunlap list_remove(&idt->idt_outbufv, buf); 1055a6d42e7dSPeter Dunlap } 1056a6d42e7dSPeter Dunlap 1057a6d42e7dSPeter Dunlap /* 1058a6d42e7dSPeter Dunlap * idm_buf_find() will lookup the idm_buf_t based on the relative offset in the 1059a6d42e7dSPeter Dunlap * iSCSI PDU 1060a6d42e7dSPeter Dunlap */ 1061a6d42e7dSPeter Dunlap idm_buf_t * 1062a6d42e7dSPeter Dunlap idm_buf_find(void *lbuf, size_t data_offset) 1063a6d42e7dSPeter Dunlap { 1064a6d42e7dSPeter Dunlap idm_buf_t *idb; 1065a6d42e7dSPeter Dunlap list_t *lst = (list_t *)lbuf; 1066a6d42e7dSPeter Dunlap 1067a6d42e7dSPeter Dunlap /* iterate through the list to find the buffer */ 1068a6d42e7dSPeter Dunlap for (idb = list_head(lst); idb != NULL; idb = list_next(lst, idb)) { 1069a6d42e7dSPeter Dunlap 1070a6d42e7dSPeter Dunlap ASSERT((idb->idb_ic->ic_conn_type == CONN_TYPE_TGT) || 1071a6d42e7dSPeter Dunlap (idb->idb_bufoffset == 0)); 1072a6d42e7dSPeter Dunlap 1073a6d42e7dSPeter Dunlap if ((data_offset >= idb->idb_bufoffset) && 1074a6d42e7dSPeter Dunlap (data_offset < (idb->idb_bufoffset + idb->idb_buflen))) { 1075a6d42e7dSPeter Dunlap 1076a6d42e7dSPeter Dunlap return (idb); 1077a6d42e7dSPeter Dunlap } 1078a6d42e7dSPeter Dunlap } 1079a6d42e7dSPeter Dunlap 1080a6d42e7dSPeter Dunlap return (NULL); 1081a6d42e7dSPeter Dunlap } 1082a6d42e7dSPeter Dunlap 1083a6d42e7dSPeter Dunlap /* 1084a6d42e7dSPeter Dunlap * idm_task_alloc 1085a6d42e7dSPeter Dunlap * 1086a6d42e7dSPeter Dunlap * This function will allocate a idm_task_t structure. A task tag is also 1087a6d42e7dSPeter Dunlap * generated and saved in idt_tt. The task is not active. 1088a6d42e7dSPeter Dunlap */ 1089a6d42e7dSPeter Dunlap idm_task_t * 1090a6d42e7dSPeter Dunlap idm_task_alloc(idm_conn_t *ic) 1091a6d42e7dSPeter Dunlap { 1092a6d42e7dSPeter Dunlap idm_task_t *idt; 1093a6d42e7dSPeter Dunlap 1094a6d42e7dSPeter Dunlap ASSERT(ic != NULL); 1095a6d42e7dSPeter Dunlap 1096a6d42e7dSPeter Dunlap /* Don't allocate new tasks if we are not in FFP */ 1097a6d42e7dSPeter Dunlap mutex_enter(&ic->ic_state_mutex); 1098a6d42e7dSPeter Dunlap if (!ic->ic_ffp) { 1099a6d42e7dSPeter Dunlap mutex_exit(&ic->ic_state_mutex); 1100a6d42e7dSPeter Dunlap return (NULL); 1101a6d42e7dSPeter Dunlap } 1102a6d42e7dSPeter Dunlap idt = kmem_cache_alloc(idm.idm_task_cache, KM_NOSLEEP); 1103a6d42e7dSPeter Dunlap if (idt == NULL) { 1104a6d42e7dSPeter Dunlap mutex_exit(&ic->ic_state_mutex); 1105a6d42e7dSPeter Dunlap return (NULL); 1106a6d42e7dSPeter Dunlap } 1107a6d42e7dSPeter Dunlap 1108a6d42e7dSPeter Dunlap ASSERT(list_is_empty(&idt->idt_inbufv)); 1109a6d42e7dSPeter Dunlap ASSERT(list_is_empty(&idt->idt_outbufv)); 1110a6d42e7dSPeter Dunlap 1111a6d42e7dSPeter Dunlap idm_conn_hold(ic); 1112a6d42e7dSPeter Dunlap mutex_exit(&ic->ic_state_mutex); 1113a6d42e7dSPeter Dunlap 1114a6d42e7dSPeter Dunlap idt->idt_state = TASK_IDLE; 1115a6d42e7dSPeter Dunlap idt->idt_ic = ic; 1116a6d42e7dSPeter Dunlap idt->idt_private = NULL; 1117a6d42e7dSPeter Dunlap idt->idt_exp_datasn = 0; 1118a6d42e7dSPeter Dunlap idt->idt_exp_rttsn = 0; 1119a6d42e7dSPeter Dunlap 1120a6d42e7dSPeter Dunlap return (idt); 1121a6d42e7dSPeter Dunlap } 1122a6d42e7dSPeter Dunlap 1123a6d42e7dSPeter Dunlap /* 1124a6d42e7dSPeter Dunlap * idm_task_start 1125a6d42e7dSPeter Dunlap * 1126a6d42e7dSPeter Dunlap * Add the task to an AVL tree to notify IDM about a new task. The caller 1127a6d42e7dSPeter Dunlap * sets up the idm_task_t structure with a prior call to idm_task_alloc(). 1128a6d42e7dSPeter Dunlap * The task service does not function as a task/work engine, it is the 1129a6d42e7dSPeter Dunlap * responsibility of the initiator to start the data transfer and free the 1130a6d42e7dSPeter Dunlap * resources. 1131a6d42e7dSPeter Dunlap */ 1132a6d42e7dSPeter Dunlap void 1133a6d42e7dSPeter Dunlap idm_task_start(idm_task_t *idt, uintptr_t handle) 1134a6d42e7dSPeter Dunlap { 1135a6d42e7dSPeter Dunlap ASSERT(idt != NULL); 1136a6d42e7dSPeter Dunlap 1137a6d42e7dSPeter Dunlap /* mark the task as ACTIVE */ 1138a6d42e7dSPeter Dunlap idt->idt_state = TASK_ACTIVE; 1139a6d42e7dSPeter Dunlap idt->idt_client_handle = handle; 1140a6d42e7dSPeter Dunlap idt->idt_tx_to_ini_start = idt->idt_tx_to_ini_done = 1141a6d42e7dSPeter Dunlap idt->idt_rx_from_ini_start = idt->idt_rx_from_ini_done = 0; 1142a6d42e7dSPeter Dunlap } 1143a6d42e7dSPeter Dunlap 1144a6d42e7dSPeter Dunlap /* 1145a6d42e7dSPeter Dunlap * idm_task_done 1146a6d42e7dSPeter Dunlap * 1147a6d42e7dSPeter Dunlap * This function will remove the task from the AVL tree indicating that the 1148a6d42e7dSPeter Dunlap * task is no longer active. 1149a6d42e7dSPeter Dunlap */ 1150a6d42e7dSPeter Dunlap void 1151a6d42e7dSPeter Dunlap idm_task_done(idm_task_t *idt) 1152a6d42e7dSPeter Dunlap { 1153a6d42e7dSPeter Dunlap ASSERT(idt != NULL); 1154a6d42e7dSPeter Dunlap ASSERT(idt->idt_refcnt.ir_refcnt == 0); 1155a6d42e7dSPeter Dunlap 1156a6d42e7dSPeter Dunlap idt->idt_state = TASK_IDLE; 1157a6d42e7dSPeter Dunlap idm_refcnt_reset(&idt->idt_refcnt); 1158a6d42e7dSPeter Dunlap } 1159a6d42e7dSPeter Dunlap 1160a6d42e7dSPeter Dunlap /* 1161a6d42e7dSPeter Dunlap * idm_task_free 1162a6d42e7dSPeter Dunlap * 1163a6d42e7dSPeter Dunlap * This function will free the Task Tag and the memory allocated for the task 1164a6d42e7dSPeter Dunlap * idm_task_done should be called prior to this call 1165a6d42e7dSPeter Dunlap */ 1166a6d42e7dSPeter Dunlap void 1167a6d42e7dSPeter Dunlap idm_task_free(idm_task_t *idt) 1168a6d42e7dSPeter Dunlap { 1169a6d42e7dSPeter Dunlap idm_conn_t *ic = idt->idt_ic; 1170a6d42e7dSPeter Dunlap 1171a6d42e7dSPeter Dunlap ASSERT(idt != NULL); 1172a6d42e7dSPeter Dunlap ASSERT(idt->idt_state == TASK_IDLE); 1173a6d42e7dSPeter Dunlap 1174a6d42e7dSPeter Dunlap /* 1175a6d42e7dSPeter Dunlap * It's possible for items to still be in the idt_inbufv list if 1176a6d42e7dSPeter Dunlap * they were added after idm_task_cleanup was called. We rely on 1177a6d42e7dSPeter Dunlap * STMF to free all buffers associated with the task however STMF 1178a6d42e7dSPeter Dunlap * doesn't know that we have this reference to the buffers. 1179a6d42e7dSPeter Dunlap * Use list_create so that we don't end up with stale references 1180a6d42e7dSPeter Dunlap * to these buffers. 1181a6d42e7dSPeter Dunlap */ 1182a6d42e7dSPeter Dunlap list_create(&idt->idt_inbufv, sizeof (idm_buf_t), 1183a6d42e7dSPeter Dunlap offsetof(idm_buf_t, idb_buflink)); 1184a6d42e7dSPeter Dunlap list_create(&idt->idt_outbufv, sizeof (idm_buf_t), 1185a6d42e7dSPeter Dunlap offsetof(idm_buf_t, idb_buflink)); 1186a6d42e7dSPeter Dunlap 1187a6d42e7dSPeter Dunlap kmem_cache_free(idm.idm_task_cache, idt); 1188a6d42e7dSPeter Dunlap 1189a6d42e7dSPeter Dunlap idm_conn_rele(ic); 1190a6d42e7dSPeter Dunlap } 1191a6d42e7dSPeter Dunlap 1192a6d42e7dSPeter Dunlap /* 1193a6d42e7dSPeter Dunlap * idm_task_find 1194a6d42e7dSPeter Dunlap * 1195a6d42e7dSPeter Dunlap * This function looks up a task by task tag 1196a6d42e7dSPeter Dunlap */ 1197a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1198a6d42e7dSPeter Dunlap idm_task_t * 1199a6d42e7dSPeter Dunlap idm_task_find(idm_conn_t *ic, uint32_t itt, uint32_t ttt) 1200a6d42e7dSPeter Dunlap { 1201a6d42e7dSPeter Dunlap uint32_t tt, client_handle; 1202a6d42e7dSPeter Dunlap idm_task_t *idt; 1203a6d42e7dSPeter Dunlap 1204a6d42e7dSPeter Dunlap /* 1205a6d42e7dSPeter Dunlap * Must match both itt and ttt. The table is indexed by itt 1206a6d42e7dSPeter Dunlap * for initiator connections and ttt for target connections. 1207a6d42e7dSPeter Dunlap */ 1208a6d42e7dSPeter Dunlap if (IDM_CONN_ISTGT(ic)) { 1209a6d42e7dSPeter Dunlap tt = ttt; 1210a6d42e7dSPeter Dunlap client_handle = itt; 1211a6d42e7dSPeter Dunlap } else { 1212a6d42e7dSPeter Dunlap tt = itt; 1213a6d42e7dSPeter Dunlap client_handle = ttt; 1214a6d42e7dSPeter Dunlap } 1215a6d42e7dSPeter Dunlap 1216a6d42e7dSPeter Dunlap rw_enter(&idm.idm_taskid_table_lock, RW_READER); 1217a6d42e7dSPeter Dunlap if (tt >= idm.idm_taskid_max) { 1218a6d42e7dSPeter Dunlap rw_exit(&idm.idm_taskid_table_lock); 1219a6d42e7dSPeter Dunlap return (NULL); 1220a6d42e7dSPeter Dunlap } 1221a6d42e7dSPeter Dunlap 1222a6d42e7dSPeter Dunlap idt = idm.idm_taskid_table[tt]; 1223a6d42e7dSPeter Dunlap 1224a6d42e7dSPeter Dunlap if (idt != NULL) { 1225a6d42e7dSPeter Dunlap mutex_enter(&idt->idt_mutex); 1226a6d42e7dSPeter Dunlap if ((idt->idt_state != TASK_ACTIVE) || 1227a6d42e7dSPeter Dunlap (IDM_CONN_ISTGT(ic) && 1228a6d42e7dSPeter Dunlap (idt->idt_client_handle != client_handle))) { 1229a6d42e7dSPeter Dunlap /* 1230a6d42e7dSPeter Dunlap * Task is aborting, we don't want any more references. 1231a6d42e7dSPeter Dunlap */ 1232a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1233a6d42e7dSPeter Dunlap rw_exit(&idm.idm_taskid_table_lock); 1234a6d42e7dSPeter Dunlap return (NULL); 1235a6d42e7dSPeter Dunlap } 1236a6d42e7dSPeter Dunlap idm_task_hold(idt); 1237a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1238a6d42e7dSPeter Dunlap } 1239a6d42e7dSPeter Dunlap rw_exit(&idm.idm_taskid_table_lock); 1240a6d42e7dSPeter Dunlap 1241a6d42e7dSPeter Dunlap return (idt); 1242a6d42e7dSPeter Dunlap } 1243a6d42e7dSPeter Dunlap 1244a6d42e7dSPeter Dunlap /* 1245a6d42e7dSPeter Dunlap * idm_task_find_by_handle 1246a6d42e7dSPeter Dunlap * 1247a6d42e7dSPeter Dunlap * This function looks up a task by the client-private idt_client_handle. 1248a6d42e7dSPeter Dunlap * 1249a6d42e7dSPeter Dunlap * This function should NEVER be called in the performance path. It is 1250a6d42e7dSPeter Dunlap * intended strictly for error recovery/task management. 1251a6d42e7dSPeter Dunlap */ 1252a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1253a6d42e7dSPeter Dunlap void * 1254a6d42e7dSPeter Dunlap idm_task_find_by_handle(idm_conn_t *ic, uintptr_t handle) 1255a6d42e7dSPeter Dunlap { 1256a6d42e7dSPeter Dunlap idm_task_t *idt = NULL; 1257a6d42e7dSPeter Dunlap int idx = 0; 1258a6d42e7dSPeter Dunlap 1259a6d42e7dSPeter Dunlap rw_enter(&idm.idm_taskid_table_lock, RW_READER); 1260a6d42e7dSPeter Dunlap 1261a6d42e7dSPeter Dunlap for (idx = 0; idx < idm.idm_taskid_max; idx++) { 1262a6d42e7dSPeter Dunlap idt = idm.idm_taskid_table[idx]; 1263a6d42e7dSPeter Dunlap 1264a6d42e7dSPeter Dunlap if (idt == NULL) 1265a6d42e7dSPeter Dunlap continue; 1266a6d42e7dSPeter Dunlap 1267a6d42e7dSPeter Dunlap mutex_enter(&idt->idt_mutex); 1268a6d42e7dSPeter Dunlap 1269a6d42e7dSPeter Dunlap if (idt->idt_state != TASK_ACTIVE) { 1270a6d42e7dSPeter Dunlap /* 1271a6d42e7dSPeter Dunlap * Task is either in suspend, abort, or already 1272a6d42e7dSPeter Dunlap * complete. 1273a6d42e7dSPeter Dunlap */ 1274a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1275a6d42e7dSPeter Dunlap continue; 1276a6d42e7dSPeter Dunlap } 1277a6d42e7dSPeter Dunlap 1278a6d42e7dSPeter Dunlap if (idt->idt_client_handle == handle) { 1279a6d42e7dSPeter Dunlap idm_task_hold(idt); 1280a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1281a6d42e7dSPeter Dunlap break; 1282a6d42e7dSPeter Dunlap } 1283a6d42e7dSPeter Dunlap 1284a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1285a6d42e7dSPeter Dunlap } 1286a6d42e7dSPeter Dunlap 1287a6d42e7dSPeter Dunlap rw_exit(&idm.idm_taskid_table_lock); 1288a6d42e7dSPeter Dunlap 1289a6d42e7dSPeter Dunlap if ((idt == NULL) || (idx == idm.idm_taskid_max)) 1290a6d42e7dSPeter Dunlap return (NULL); 1291a6d42e7dSPeter Dunlap 1292a6d42e7dSPeter Dunlap return (idt->idt_private); 1293a6d42e7dSPeter Dunlap } 1294a6d42e7dSPeter Dunlap 1295a6d42e7dSPeter Dunlap void 1296a6d42e7dSPeter Dunlap idm_task_hold(idm_task_t *idt) 1297a6d42e7dSPeter Dunlap { 1298a6d42e7dSPeter Dunlap idm_refcnt_hold(&idt->idt_refcnt); 1299a6d42e7dSPeter Dunlap } 1300a6d42e7dSPeter Dunlap 1301a6d42e7dSPeter Dunlap void 1302a6d42e7dSPeter Dunlap idm_task_rele(idm_task_t *idt) 1303a6d42e7dSPeter Dunlap { 1304a6d42e7dSPeter Dunlap idm_refcnt_rele(&idt->idt_refcnt); 1305a6d42e7dSPeter Dunlap } 1306a6d42e7dSPeter Dunlap 1307a6d42e7dSPeter Dunlap void 1308a6d42e7dSPeter Dunlap idm_task_abort(idm_conn_t *ic, idm_task_t *idt, idm_abort_type_t abort_type) 1309a6d42e7dSPeter Dunlap { 1310a6d42e7dSPeter Dunlap idm_task_t *task; 1311a6d42e7dSPeter Dunlap int idx; 1312a6d42e7dSPeter Dunlap 1313a6d42e7dSPeter Dunlap /* 1314a6d42e7dSPeter Dunlap * Passing NULL as the task indicates that all tasks 1315a6d42e7dSPeter Dunlap * for this connection should be aborted. 1316a6d42e7dSPeter Dunlap */ 1317a6d42e7dSPeter Dunlap if (idt == NULL) { 1318a6d42e7dSPeter Dunlap /* 1319a6d42e7dSPeter Dunlap * Only the connection state machine should ask for 1320a6d42e7dSPeter Dunlap * all tasks to abort and this should never happen in FFP. 1321a6d42e7dSPeter Dunlap */ 1322a6d42e7dSPeter Dunlap ASSERT(!ic->ic_ffp); 1323a6d42e7dSPeter Dunlap rw_enter(&idm.idm_taskid_table_lock, RW_READER); 1324a6d42e7dSPeter Dunlap for (idx = 0; idx < idm.idm_taskid_max; idx++) { 1325a6d42e7dSPeter Dunlap task = idm.idm_taskid_table[idx]; 1326a6d42e7dSPeter Dunlap if (task && (task->idt_state != TASK_IDLE) && 1327a6d42e7dSPeter Dunlap (task->idt_ic == ic)) { 1328a6d42e7dSPeter Dunlap rw_exit(&idm.idm_taskid_table_lock); 1329a6d42e7dSPeter Dunlap idm_task_abort_one(ic, task, abort_type); 1330a6d42e7dSPeter Dunlap rw_enter(&idm.idm_taskid_table_lock, RW_READER); 1331a6d42e7dSPeter Dunlap } 1332a6d42e7dSPeter Dunlap } 1333a6d42e7dSPeter Dunlap rw_exit(&idm.idm_taskid_table_lock); 1334a6d42e7dSPeter Dunlap } else { 1335a6d42e7dSPeter Dunlap idm_task_abort_one(ic, idt, abort_type); 1336a6d42e7dSPeter Dunlap } 1337a6d42e7dSPeter Dunlap } 1338a6d42e7dSPeter Dunlap 1339a6d42e7dSPeter Dunlap static void 1340a6d42e7dSPeter Dunlap idm_task_abort_unref_cb(void *ref) 1341a6d42e7dSPeter Dunlap { 1342a6d42e7dSPeter Dunlap idm_task_t *idt = ref; 1343a6d42e7dSPeter Dunlap 1344a6d42e7dSPeter Dunlap mutex_enter(&idt->idt_mutex); 1345a6d42e7dSPeter Dunlap switch (idt->idt_state) { 1346a6d42e7dSPeter Dunlap case TASK_SUSPENDING: 1347a6d42e7dSPeter Dunlap idt->idt_state = TASK_SUSPENDED; 1348a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1349a6d42e7dSPeter Dunlap idm_task_aborted(idt, IDM_STATUS_SUSPENDED); 1350a6d42e7dSPeter Dunlap return; 1351a6d42e7dSPeter Dunlap case TASK_ABORTING: 1352a6d42e7dSPeter Dunlap idt->idt_state = TASK_ABORTED; 1353a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1354a6d42e7dSPeter Dunlap idm_task_aborted(idt, IDM_STATUS_ABORTED); 1355a6d42e7dSPeter Dunlap return; 1356a6d42e7dSPeter Dunlap default: 1357a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1358a6d42e7dSPeter Dunlap ASSERT(0); 1359a6d42e7dSPeter Dunlap break; 1360a6d42e7dSPeter Dunlap } 1361a6d42e7dSPeter Dunlap } 1362a6d42e7dSPeter Dunlap 1363a6d42e7dSPeter Dunlap static void 1364a6d42e7dSPeter Dunlap idm_task_abort_one(idm_conn_t *ic, idm_task_t *idt, idm_abort_type_t abort_type) 1365a6d42e7dSPeter Dunlap { 1366a6d42e7dSPeter Dunlap /* Caller must hold connection mutex */ 1367a6d42e7dSPeter Dunlap mutex_enter(&idt->idt_mutex); 1368a6d42e7dSPeter Dunlap switch (idt->idt_state) { 1369a6d42e7dSPeter Dunlap case TASK_ACTIVE: 1370a6d42e7dSPeter Dunlap switch (abort_type) { 1371a6d42e7dSPeter Dunlap case AT_INTERNAL_SUSPEND: 1372a6d42e7dSPeter Dunlap /* Call transport to release any resources */ 1373a6d42e7dSPeter Dunlap idt->idt_state = TASK_SUSPENDING; 1374a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1375a6d42e7dSPeter Dunlap ic->ic_transport_ops->it_free_task_rsrc(idt); 1376a6d42e7dSPeter Dunlap 1377a6d42e7dSPeter Dunlap /* 1378a6d42e7dSPeter Dunlap * Wait for outstanding references. When all 1379a6d42e7dSPeter Dunlap * references are released the callback will call 1380a6d42e7dSPeter Dunlap * idm_task_aborted(). 1381a6d42e7dSPeter Dunlap */ 1382a6d42e7dSPeter Dunlap idm_refcnt_async_wait_ref(&idt->idt_refcnt, 1383a6d42e7dSPeter Dunlap &idm_task_abort_unref_cb); 1384a6d42e7dSPeter Dunlap return; 1385a6d42e7dSPeter Dunlap case AT_INTERNAL_ABORT: 1386a6d42e7dSPeter Dunlap case AT_TASK_MGMT_ABORT: 1387a6d42e7dSPeter Dunlap idt->idt_state = TASK_ABORTING; 1388a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1389a6d42e7dSPeter Dunlap ic->ic_transport_ops->it_free_task_rsrc(idt); 1390a6d42e7dSPeter Dunlap 1391a6d42e7dSPeter Dunlap /* 1392a6d42e7dSPeter Dunlap * Wait for outstanding references. When all 1393a6d42e7dSPeter Dunlap * references are released the callback will call 1394a6d42e7dSPeter Dunlap * idm_task_aborted(). 1395a6d42e7dSPeter Dunlap */ 1396a6d42e7dSPeter Dunlap idm_refcnt_async_wait_ref(&idt->idt_refcnt, 1397a6d42e7dSPeter Dunlap &idm_task_abort_unref_cb); 1398a6d42e7dSPeter Dunlap return; 1399a6d42e7dSPeter Dunlap default: 1400a6d42e7dSPeter Dunlap ASSERT(0); 1401a6d42e7dSPeter Dunlap } 1402a6d42e7dSPeter Dunlap break; 1403a6d42e7dSPeter Dunlap case TASK_SUSPENDING: 1404a6d42e7dSPeter Dunlap /* Already called transport_free_task_rsrc(); */ 1405a6d42e7dSPeter Dunlap switch (abort_type) { 1406a6d42e7dSPeter Dunlap case AT_INTERNAL_SUSPEND: 1407a6d42e7dSPeter Dunlap /* Already doing it */ 1408a6d42e7dSPeter Dunlap break; 1409a6d42e7dSPeter Dunlap case AT_INTERNAL_ABORT: 1410a6d42e7dSPeter Dunlap case AT_TASK_MGMT_ABORT: 1411a6d42e7dSPeter Dunlap idt->idt_state = TASK_ABORTING; 1412a6d42e7dSPeter Dunlap break; 1413a6d42e7dSPeter Dunlap default: 1414a6d42e7dSPeter Dunlap ASSERT(0); 1415a6d42e7dSPeter Dunlap } 1416a6d42e7dSPeter Dunlap break; 1417a6d42e7dSPeter Dunlap case TASK_SUSPENDED: 1418a6d42e7dSPeter Dunlap /* Already called transport_free_task_rsrc(); */ 1419a6d42e7dSPeter Dunlap switch (abort_type) { 1420a6d42e7dSPeter Dunlap case AT_INTERNAL_SUSPEND: 1421a6d42e7dSPeter Dunlap /* Already doing it */ 1422a6d42e7dSPeter Dunlap break; 1423a6d42e7dSPeter Dunlap case AT_INTERNAL_ABORT: 1424a6d42e7dSPeter Dunlap case AT_TASK_MGMT_ABORT: 1425a6d42e7dSPeter Dunlap idt->idt_state = TASK_ABORTING; 1426a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1427a6d42e7dSPeter Dunlap 1428a6d42e7dSPeter Dunlap /* 1429a6d42e7dSPeter Dunlap * We could probably call idm_task_aborted directly 1430a6d42e7dSPeter Dunlap * here but we may be holding the conn lock. It's 1431a6d42e7dSPeter Dunlap * easier to just switch contexts. Even though 1432a6d42e7dSPeter Dunlap * we shouldn't really have any references we'll 1433a6d42e7dSPeter Dunlap * set the state to TASK_ABORTING instead of 1434a6d42e7dSPeter Dunlap * TASK_ABORTED so we can use the same code path. 1435a6d42e7dSPeter Dunlap */ 1436a6d42e7dSPeter Dunlap idm_refcnt_async_wait_ref(&idt->idt_refcnt, 1437a6d42e7dSPeter Dunlap &idm_task_abort_unref_cb); 1438a6d42e7dSPeter Dunlap return; 1439a6d42e7dSPeter Dunlap default: 1440a6d42e7dSPeter Dunlap ASSERT(0); 1441a6d42e7dSPeter Dunlap } 1442a6d42e7dSPeter Dunlap break; 1443a6d42e7dSPeter Dunlap case TASK_ABORTING: 1444a6d42e7dSPeter Dunlap case TASK_ABORTED: 1445a6d42e7dSPeter Dunlap switch (abort_type) { 1446a6d42e7dSPeter Dunlap case AT_INTERNAL_SUSPEND: 1447a6d42e7dSPeter Dunlap /* We're already past this point... */ 1448a6d42e7dSPeter Dunlap case AT_INTERNAL_ABORT: 1449a6d42e7dSPeter Dunlap case AT_TASK_MGMT_ABORT: 1450a6d42e7dSPeter Dunlap /* Already doing it */ 1451a6d42e7dSPeter Dunlap break; 1452a6d42e7dSPeter Dunlap default: 1453a6d42e7dSPeter Dunlap ASSERT(0); 1454a6d42e7dSPeter Dunlap } 1455a6d42e7dSPeter Dunlap break; 1456a6d42e7dSPeter Dunlap case TASK_COMPLETE: 1457a6d42e7dSPeter Dunlap /* 1458a6d42e7dSPeter Dunlap * In this case, let it go. The status has already been 1459a6d42e7dSPeter Dunlap * sent (which may or may not get successfully transmitted) 1460a6d42e7dSPeter Dunlap * and we don't want to end up in a race between completing 1461a6d42e7dSPeter Dunlap * the status PDU and marking the task suspended. 1462a6d42e7dSPeter Dunlap */ 1463a6d42e7dSPeter Dunlap break; 1464a6d42e7dSPeter Dunlap default: 1465a6d42e7dSPeter Dunlap ASSERT(0); 1466a6d42e7dSPeter Dunlap } 1467a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1468a6d42e7dSPeter Dunlap } 1469a6d42e7dSPeter Dunlap 1470a6d42e7dSPeter Dunlap static void 1471a6d42e7dSPeter Dunlap idm_task_aborted(idm_task_t *idt, idm_status_t status) 1472a6d42e7dSPeter Dunlap { 1473a6d42e7dSPeter Dunlap (*idt->idt_ic->ic_conn_ops.icb_task_aborted)(idt, status); 1474a6d42e7dSPeter Dunlap } 1475a6d42e7dSPeter Dunlap 1476a6d42e7dSPeter Dunlap void 1477a6d42e7dSPeter Dunlap idm_task_cleanup(idm_task_t *idt) 1478a6d42e7dSPeter Dunlap { 1479a6d42e7dSPeter Dunlap idm_buf_t *idb, *next_idb; 1480a6d42e7dSPeter Dunlap list_t tmp_buflist; 1481a6d42e7dSPeter Dunlap ASSERT((idt->idt_state == TASK_SUSPENDED) || 1482a6d42e7dSPeter Dunlap (idt->idt_state == TASK_ABORTED)); 1483a6d42e7dSPeter Dunlap 1484a6d42e7dSPeter Dunlap list_create(&tmp_buflist, sizeof (idm_buf_t), 1485a6d42e7dSPeter Dunlap offsetof(idm_buf_t, idb_buflink)); 1486a6d42e7dSPeter Dunlap 1487a6d42e7dSPeter Dunlap /* 1488a6d42e7dSPeter Dunlap * Remove all the buffers from the task and add them to a 1489a6d42e7dSPeter Dunlap * temporary local list -- we do this so that we can hold 1490a6d42e7dSPeter Dunlap * the task lock and prevent the task from going away if 1491a6d42e7dSPeter Dunlap * the client decides to call idm_task_done/idm_task_free. 1492a6d42e7dSPeter Dunlap * This could happen during abort in iscsit. 1493a6d42e7dSPeter Dunlap */ 1494a6d42e7dSPeter Dunlap mutex_enter(&idt->idt_mutex); 1495a6d42e7dSPeter Dunlap for (idb = list_head(&idt->idt_inbufv); 1496a6d42e7dSPeter Dunlap idb != NULL; 1497a6d42e7dSPeter Dunlap idb = next_idb) { 1498a6d42e7dSPeter Dunlap next_idb = list_next(&idt->idt_inbufv, idb); 1499a6d42e7dSPeter Dunlap idm_buf_unbind_in_locked(idt, idb); 1500a6d42e7dSPeter Dunlap list_insert_tail(&tmp_buflist, idb); 1501a6d42e7dSPeter Dunlap } 1502a6d42e7dSPeter Dunlap 1503a6d42e7dSPeter Dunlap for (idb = list_head(&idt->idt_outbufv); 1504a6d42e7dSPeter Dunlap idb != NULL; 1505a6d42e7dSPeter Dunlap idb = next_idb) { 1506a6d42e7dSPeter Dunlap next_idb = list_next(&idt->idt_outbufv, idb); 1507a6d42e7dSPeter Dunlap idm_buf_unbind_out_locked(idt, idb); 1508a6d42e7dSPeter Dunlap list_insert_tail(&tmp_buflist, idb); 1509a6d42e7dSPeter Dunlap } 1510a6d42e7dSPeter Dunlap mutex_exit(&idt->idt_mutex); 1511a6d42e7dSPeter Dunlap 1512a6d42e7dSPeter Dunlap for (idb = list_head(&tmp_buflist); idb != NULL; idb = next_idb) { 1513a6d42e7dSPeter Dunlap next_idb = list_next(&tmp_buflist, idb); 1514a6d42e7dSPeter Dunlap list_remove(&tmp_buflist, idb); 1515a6d42e7dSPeter Dunlap (*idb->idb_buf_cb)(idb, IDM_STATUS_ABORTED); 1516a6d42e7dSPeter Dunlap } 1517a6d42e7dSPeter Dunlap list_destroy(&tmp_buflist); 1518a6d42e7dSPeter Dunlap } 1519a6d42e7dSPeter Dunlap 1520a6d42e7dSPeter Dunlap 1521a6d42e7dSPeter Dunlap /* 1522a6d42e7dSPeter Dunlap * idm_pdu_tx 1523a6d42e7dSPeter Dunlap * 1524a6d42e7dSPeter Dunlap * This is IDM's implementation of the 'Send_Control' operational primitive. 1525a6d42e7dSPeter Dunlap * This function is invoked by an initiator iSCSI layer requesting the transfer 1526a6d42e7dSPeter Dunlap * of a iSCSI command PDU or a target iSCSI layer requesting the transfer of a 1527a6d42e7dSPeter Dunlap * iSCSI response PDU. The PDU will be transmitted as-is by the local Datamover 1528a6d42e7dSPeter Dunlap * layer to the peer iSCSI layer in the remote iSCSI node. The connection info 1529a6d42e7dSPeter Dunlap * and iSCSI PDU-specific qualifiers namely BHS, AHS, DataDescriptor and Size 1530a6d42e7dSPeter Dunlap * are provided as input. 1531a6d42e7dSPeter Dunlap * 1532a6d42e7dSPeter Dunlap */ 1533a6d42e7dSPeter Dunlap void 1534a6d42e7dSPeter Dunlap idm_pdu_tx(idm_pdu_t *pdu) 1535a6d42e7dSPeter Dunlap { 1536a6d42e7dSPeter Dunlap idm_conn_t *ic = pdu->isp_ic; 1537a6d42e7dSPeter Dunlap iscsi_async_evt_hdr_t *async_evt; 1538a6d42e7dSPeter Dunlap 1539a6d42e7dSPeter Dunlap /* 1540a6d42e7dSPeter Dunlap * If we are in full-featured mode then route SCSI-related 1541a6d42e7dSPeter Dunlap * commands to the appropriate function vector without checking 1542a6d42e7dSPeter Dunlap * the connection state. We will only be in full-feature mode 1543a6d42e7dSPeter Dunlap * when we are in an acceptable state for SCSI PDU's. 1544a6d42e7dSPeter Dunlap * 1545a6d42e7dSPeter Dunlap * We also need to ensure that there are no PDU events outstanding 1546a6d42e7dSPeter Dunlap * on the state machine. Any non-SCSI PDU's received in full-feature 1547a6d42e7dSPeter Dunlap * mode will result in PDU events and until these have been handled 1548a6d42e7dSPeter Dunlap * we need to route all PDU's through the state machine as PDU 1549a6d42e7dSPeter Dunlap * events to maintain ordering. 1550a6d42e7dSPeter Dunlap * 1551a6d42e7dSPeter Dunlap * Note that IDM cannot enter FFP mode until it processes in 1552a6d42e7dSPeter Dunlap * its state machine the last xmit of the login process. 1553a6d42e7dSPeter Dunlap * Hence, checking the IDM_PDU_LOGIN_TX flag here would be 1554a6d42e7dSPeter Dunlap * superfluous. 1555a6d42e7dSPeter Dunlap */ 1556a6d42e7dSPeter Dunlap mutex_enter(&ic->ic_state_mutex); 1557a6d42e7dSPeter Dunlap if (ic->ic_ffp && (ic->ic_pdu_events == 0)) { 1558a6d42e7dSPeter Dunlap mutex_exit(&ic->ic_state_mutex); 1559a6d42e7dSPeter Dunlap switch (IDM_PDU_OPCODE(pdu)) { 1560a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_RSP: 1561a6d42e7dSPeter Dunlap /* Target only */ 1562a6d42e7dSPeter Dunlap idm_pdu_tx_forward(ic, pdu); 1563a6d42e7dSPeter Dunlap return; 1564a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_TASK_MGT_RSP: 1565a6d42e7dSPeter Dunlap /* Target only */ 1566a6d42e7dSPeter Dunlap idm_pdu_tx_forward(ic, pdu); 1567a6d42e7dSPeter Dunlap return; 1568a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_DATA_RSP: 1569a6d42e7dSPeter Dunlap /* Target only */ 1570a6d42e7dSPeter Dunlap idm_pdu_tx_forward(ic, pdu); 1571a6d42e7dSPeter Dunlap return; 1572a6d42e7dSPeter Dunlap case ISCSI_OP_RTT_RSP: 1573a6d42e7dSPeter Dunlap /* Target only */ 1574a6d42e7dSPeter Dunlap idm_pdu_tx_forward(ic, pdu); 1575a6d42e7dSPeter Dunlap return; 1576a6d42e7dSPeter Dunlap case ISCSI_OP_NOOP_IN: 1577a6d42e7dSPeter Dunlap /* Target only */ 1578a6d42e7dSPeter Dunlap idm_pdu_tx_forward(ic, pdu); 1579a6d42e7dSPeter Dunlap return; 1580a6d42e7dSPeter Dunlap case ISCSI_OP_TEXT_RSP: 1581a6d42e7dSPeter Dunlap /* Target only */ 1582a6d42e7dSPeter Dunlap idm_pdu_tx_forward(ic, pdu); 1583a6d42e7dSPeter Dunlap return; 1584a6d42e7dSPeter Dunlap case ISCSI_OP_TEXT_CMD: 1585a6d42e7dSPeter Dunlap case ISCSI_OP_NOOP_OUT: 1586a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_CMD: 1587a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_DATA: 1588a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_TASK_MGT_MSG: 1589a6d42e7dSPeter Dunlap /* Initiator only */ 1590a6d42e7dSPeter Dunlap idm_pdu_tx_forward(ic, pdu); 1591a6d42e7dSPeter Dunlap return; 1592a6d42e7dSPeter Dunlap default: 1593a6d42e7dSPeter Dunlap break; 1594a6d42e7dSPeter Dunlap } 1595a6d42e7dSPeter Dunlap 1596a6d42e7dSPeter Dunlap mutex_enter(&ic->ic_state_mutex); 1597a6d42e7dSPeter Dunlap } 1598a6d42e7dSPeter Dunlap 1599a6d42e7dSPeter Dunlap /* 1600a6d42e7dSPeter Dunlap * Any PDU's processed outside of full-feature mode and non-SCSI 1601a6d42e7dSPeter Dunlap * PDU's in full-feature mode are handled by generating an 1602a6d42e7dSPeter Dunlap * event to the connection state machine. The state machine 1603a6d42e7dSPeter Dunlap * will validate the PDU against the current state and either 1604a6d42e7dSPeter Dunlap * transmit the PDU if the opcode is allowed or handle an 1605a6d42e7dSPeter Dunlap * error if the PDU is not allowed. 1606a6d42e7dSPeter Dunlap * 1607a6d42e7dSPeter Dunlap * This code-path will also generate any events that are implied 1608a6d42e7dSPeter Dunlap * by the PDU opcode. For example a "login response" with success 1609a6d42e7dSPeter Dunlap * status generates a CE_LOGOUT_SUCCESS_SND event. 1610a6d42e7dSPeter Dunlap */ 1611a6d42e7dSPeter Dunlap switch (IDM_PDU_OPCODE(pdu)) { 1612a6d42e7dSPeter Dunlap case ISCSI_OP_LOGIN_CMD: 1613a6d42e7dSPeter Dunlap idm_conn_tx_pdu_event(ic, CE_LOGIN_SND, (uintptr_t)pdu); 1614a6d42e7dSPeter Dunlap break; 1615a6d42e7dSPeter Dunlap case ISCSI_OP_LOGIN_RSP: 1616a6d42e7dSPeter Dunlap idm_parse_login_rsp(ic, pdu, /* Is RX */ B_FALSE); 1617a6d42e7dSPeter Dunlap break; 1618a6d42e7dSPeter Dunlap case ISCSI_OP_LOGOUT_CMD: 1619a6d42e7dSPeter Dunlap idm_parse_logout_req(ic, pdu, /* Is RX */ B_FALSE); 1620a6d42e7dSPeter Dunlap break; 1621a6d42e7dSPeter Dunlap case ISCSI_OP_LOGOUT_RSP: 1622a6d42e7dSPeter Dunlap idm_parse_logout_rsp(ic, pdu, /* Is RX */ B_FALSE); 1623a6d42e7dSPeter Dunlap break; 1624a6d42e7dSPeter Dunlap case ISCSI_OP_ASYNC_EVENT: 1625a6d42e7dSPeter Dunlap async_evt = (iscsi_async_evt_hdr_t *)pdu->isp_hdr; 1626a6d42e7dSPeter Dunlap switch (async_evt->async_event) { 1627a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_REQUEST_LOGOUT: 1628a6d42e7dSPeter Dunlap idm_conn_tx_pdu_event(ic, CE_ASYNC_LOGOUT_SND, 1629a6d42e7dSPeter Dunlap (uintptr_t)pdu); 1630a6d42e7dSPeter Dunlap break; 1631a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_DROPPING_CONNECTION: 1632a6d42e7dSPeter Dunlap idm_conn_tx_pdu_event(ic, CE_ASYNC_DROP_CONN_SND, 1633a6d42e7dSPeter Dunlap (uintptr_t)pdu); 1634a6d42e7dSPeter Dunlap break; 1635a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_DROPPING_ALL_CONNECTIONS: 1636a6d42e7dSPeter Dunlap idm_conn_tx_pdu_event(ic, CE_ASYNC_DROP_ALL_CONN_SND, 1637a6d42e7dSPeter Dunlap (uintptr_t)pdu); 1638a6d42e7dSPeter Dunlap break; 1639a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_SCSI_EVENT: 1640a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_PARAM_NEGOTIATION: 1641a6d42e7dSPeter Dunlap default: 1642a6d42e7dSPeter Dunlap idm_conn_tx_pdu_event(ic, CE_MISC_TX, 1643a6d42e7dSPeter Dunlap (uintptr_t)pdu); 1644a6d42e7dSPeter Dunlap break; 1645a6d42e7dSPeter Dunlap } 1646a6d42e7dSPeter Dunlap break; 1647a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_RSP: 1648a6d42e7dSPeter Dunlap /* Target only */ 1649a6d42e7dSPeter Dunlap idm_conn_tx_pdu_event(ic, CE_MISC_TX, (uintptr_t)pdu); 1650a6d42e7dSPeter Dunlap break; 1651a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_TASK_MGT_RSP: 1652a6d42e7dSPeter Dunlap /* Target only */ 1653a6d42e7dSPeter Dunlap idm_conn_tx_pdu_event(ic, CE_MISC_TX, (uintptr_t)pdu); 1654a6d42e7dSPeter Dunlap break; 1655a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_DATA_RSP: 1656a6d42e7dSPeter Dunlap /* Target only */ 1657a6d42e7dSPeter Dunlap idm_conn_tx_pdu_event(ic, CE_MISC_TX, (uintptr_t)pdu); 1658a6d42e7dSPeter Dunlap break; 1659a6d42e7dSPeter Dunlap case ISCSI_OP_RTT_RSP: 1660a6d42e7dSPeter Dunlap /* Target only */ 1661a6d42e7dSPeter Dunlap idm_conn_tx_pdu_event(ic, CE_MISC_TX, (uintptr_t)pdu); 1662a6d42e7dSPeter Dunlap break; 1663a6d42e7dSPeter Dunlap case ISCSI_OP_NOOP_IN: 1664a6d42e7dSPeter Dunlap /* Target only */ 1665a6d42e7dSPeter Dunlap idm_conn_tx_pdu_event(ic, CE_MISC_TX, (uintptr_t)pdu); 1666a6d42e7dSPeter Dunlap break; 1667a6d42e7dSPeter Dunlap case ISCSI_OP_TEXT_RSP: 1668a6d42e7dSPeter Dunlap /* Target only */ 1669a6d42e7dSPeter Dunlap idm_conn_tx_pdu_event(ic, CE_MISC_TX, (uintptr_t)pdu); 1670a6d42e7dSPeter Dunlap break; 1671a6d42e7dSPeter Dunlap /* Initiator only */ 1672a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_CMD: 1673a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_TASK_MGT_MSG: 1674a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_DATA: 1675a6d42e7dSPeter Dunlap case ISCSI_OP_NOOP_OUT: 1676a6d42e7dSPeter Dunlap case ISCSI_OP_TEXT_CMD: 1677a6d42e7dSPeter Dunlap case ISCSI_OP_SNACK_CMD: 1678a6d42e7dSPeter Dunlap case ISCSI_OP_REJECT_MSG: 1679a6d42e7dSPeter Dunlap default: 1680a6d42e7dSPeter Dunlap /* 1681a6d42e7dSPeter Dunlap * Connection state machine will validate these PDU's against 1682a6d42e7dSPeter Dunlap * the current state. A PDU not allowed in the current 1683a6d42e7dSPeter Dunlap * state will cause a protocol error. 1684a6d42e7dSPeter Dunlap */ 1685a6d42e7dSPeter Dunlap idm_conn_tx_pdu_event(ic, CE_MISC_TX, (uintptr_t)pdu); 1686a6d42e7dSPeter Dunlap break; 1687a6d42e7dSPeter Dunlap } 1688a6d42e7dSPeter Dunlap mutex_exit(&ic->ic_state_mutex); 1689a6d42e7dSPeter Dunlap } 1690a6d42e7dSPeter Dunlap 1691a6d42e7dSPeter Dunlap /* 1692a6d42e7dSPeter Dunlap * Allocates a PDU along with memory for header and data. 1693a6d42e7dSPeter Dunlap */ 1694a6d42e7dSPeter Dunlap 1695a6d42e7dSPeter Dunlap idm_pdu_t * 1696a6d42e7dSPeter Dunlap idm_pdu_alloc(uint_t hdrlen, uint_t datalen) 1697a6d42e7dSPeter Dunlap { 1698a6d42e7dSPeter Dunlap idm_pdu_t *result; 1699a6d42e7dSPeter Dunlap 1700a6d42e7dSPeter Dunlap /* 1701a6d42e7dSPeter Dunlap * IDM clients should cache these structures for performance 1702a6d42e7dSPeter Dunlap * critical paths. We can't cache effectively in IDM because we 1703a6d42e7dSPeter Dunlap * don't know the correct header and data size. 1704a6d42e7dSPeter Dunlap * 1705a6d42e7dSPeter Dunlap * Valid header length is assumed to be hdrlen and valid data 1706a6d42e7dSPeter Dunlap * length is assumed to be datalen. isp_hdrlen and isp_datalen 1707a6d42e7dSPeter Dunlap * can be adjusted after the PDU is returned if necessary. 1708a6d42e7dSPeter Dunlap */ 1709a6d42e7dSPeter Dunlap result = kmem_zalloc(sizeof (idm_pdu_t) + hdrlen + datalen, KM_SLEEP); 1710a6d42e7dSPeter Dunlap result->isp_flags |= IDM_PDU_ALLOC; /* For idm_pdu_free sanity check */ 1711a6d42e7dSPeter Dunlap result->isp_hdr = (iscsi_hdr_t *)(result + 1); /* Ptr. Arithmetic */ 1712a6d42e7dSPeter Dunlap result->isp_hdrlen = hdrlen; 1713a6d42e7dSPeter Dunlap result->isp_hdrbuflen = hdrlen; 1714a6d42e7dSPeter Dunlap result->isp_transport_hdrlen = 0; 1715a6d42e7dSPeter Dunlap result->isp_data = (uint8_t *)result->isp_hdr + hdrlen; 1716a6d42e7dSPeter Dunlap result->isp_datalen = datalen; 1717a6d42e7dSPeter Dunlap result->isp_databuflen = datalen; 1718a6d42e7dSPeter Dunlap result->isp_magic = IDM_PDU_MAGIC; 1719a6d42e7dSPeter Dunlap 1720a6d42e7dSPeter Dunlap return (result); 1721a6d42e7dSPeter Dunlap } 1722a6d42e7dSPeter Dunlap 1723a6d42e7dSPeter Dunlap /* 1724a6d42e7dSPeter Dunlap * Free a PDU previously allocated with idm_pdu_alloc() including any 1725a6d42e7dSPeter Dunlap * header and data space allocated as part of the original request. 1726a6d42e7dSPeter Dunlap * Additional memory regions referenced by subsequent modification of 1727a6d42e7dSPeter Dunlap * the isp_hdr and/or isp_data fields will not be freed. 1728a6d42e7dSPeter Dunlap */ 1729a6d42e7dSPeter Dunlap void 1730a6d42e7dSPeter Dunlap idm_pdu_free(idm_pdu_t *pdu) 1731a6d42e7dSPeter Dunlap { 1732a6d42e7dSPeter Dunlap /* Make sure the structure was allocated using idm_pdu_alloc() */ 1733a6d42e7dSPeter Dunlap ASSERT(pdu->isp_flags & IDM_PDU_ALLOC); 1734a6d42e7dSPeter Dunlap kmem_free(pdu, 1735a6d42e7dSPeter Dunlap sizeof (idm_pdu_t) + pdu->isp_hdrbuflen + pdu->isp_databuflen); 1736a6d42e7dSPeter Dunlap } 1737a6d42e7dSPeter Dunlap 1738a6d42e7dSPeter Dunlap /* 1739a6d42e7dSPeter Dunlap * Initialize the connection, private and callback fields in a PDU. 1740a6d42e7dSPeter Dunlap */ 1741a6d42e7dSPeter Dunlap void 1742a6d42e7dSPeter Dunlap idm_pdu_init(idm_pdu_t *pdu, idm_conn_t *ic, void *private, idm_pdu_cb_t *cb) 1743a6d42e7dSPeter Dunlap { 1744a6d42e7dSPeter Dunlap /* 1745a6d42e7dSPeter Dunlap * idm_pdu_complete() will call idm_pdu_free if the callback is 1746a6d42e7dSPeter Dunlap * NULL. This will only work if the PDU was originally allocated 1747a6d42e7dSPeter Dunlap * with idm_pdu_alloc(). 1748a6d42e7dSPeter Dunlap */ 1749a6d42e7dSPeter Dunlap ASSERT((pdu->isp_flags & IDM_PDU_ALLOC) || 1750a6d42e7dSPeter Dunlap (cb != NULL)); 1751a6d42e7dSPeter Dunlap pdu->isp_magic = IDM_PDU_MAGIC; 1752a6d42e7dSPeter Dunlap pdu->isp_ic = ic; 1753a6d42e7dSPeter Dunlap pdu->isp_private = private; 1754a6d42e7dSPeter Dunlap pdu->isp_callback = cb; 1755a6d42e7dSPeter Dunlap } 1756a6d42e7dSPeter Dunlap 1757a6d42e7dSPeter Dunlap /* 1758a6d42e7dSPeter Dunlap * Initialize the header and header length field. This function should 1759a6d42e7dSPeter Dunlap * not be used to adjust the header length in a buffer allocated via 1760a6d42e7dSPeter Dunlap * pdu_pdu_alloc since it overwrites the existing header pointer. 1761a6d42e7dSPeter Dunlap */ 1762a6d42e7dSPeter Dunlap void 1763a6d42e7dSPeter Dunlap idm_pdu_init_hdr(idm_pdu_t *pdu, uint8_t *hdr, uint_t hdrlen) 1764a6d42e7dSPeter Dunlap { 1765a6d42e7dSPeter Dunlap pdu->isp_hdr = (iscsi_hdr_t *)((void *)hdr); 1766a6d42e7dSPeter Dunlap pdu->isp_hdrlen = hdrlen; 1767a6d42e7dSPeter Dunlap } 1768a6d42e7dSPeter Dunlap 1769a6d42e7dSPeter Dunlap /* 1770a6d42e7dSPeter Dunlap * Initialize the data and data length fields. This function should 1771a6d42e7dSPeter Dunlap * not be used to adjust the data length of a buffer allocated via 1772a6d42e7dSPeter Dunlap * idm_pdu_alloc since it overwrites the existing data pointer. 1773a6d42e7dSPeter Dunlap */ 1774a6d42e7dSPeter Dunlap void 1775a6d42e7dSPeter Dunlap idm_pdu_init_data(idm_pdu_t *pdu, uint8_t *data, uint_t datalen) 1776a6d42e7dSPeter Dunlap { 1777a6d42e7dSPeter Dunlap pdu->isp_data = data; 1778a6d42e7dSPeter Dunlap pdu->isp_datalen = datalen; 1779a6d42e7dSPeter Dunlap } 1780a6d42e7dSPeter Dunlap 1781a6d42e7dSPeter Dunlap void 1782a6d42e7dSPeter Dunlap idm_pdu_complete(idm_pdu_t *pdu, idm_status_t status) 1783a6d42e7dSPeter Dunlap { 1784a6d42e7dSPeter Dunlap if (pdu->isp_callback) { 1785a6d42e7dSPeter Dunlap pdu->isp_status = status; 1786a6d42e7dSPeter Dunlap (*pdu->isp_callback)(pdu, status); 1787a6d42e7dSPeter Dunlap } else { 1788a6d42e7dSPeter Dunlap idm_pdu_free(pdu); 1789a6d42e7dSPeter Dunlap } 1790a6d42e7dSPeter Dunlap } 1791a6d42e7dSPeter Dunlap 1792a6d42e7dSPeter Dunlap /* 1793a6d42e7dSPeter Dunlap * State machine auditing 1794a6d42e7dSPeter Dunlap */ 1795a6d42e7dSPeter Dunlap 1796a6d42e7dSPeter Dunlap void 1797a6d42e7dSPeter Dunlap idm_sm_audit_init(sm_audit_buf_t *audit_buf) 1798a6d42e7dSPeter Dunlap { 1799a6d42e7dSPeter Dunlap bzero(audit_buf, sizeof (sm_audit_buf_t)); 1800a6d42e7dSPeter Dunlap audit_buf->sab_max_index = SM_AUDIT_BUF_MAX_REC - 1; 1801a6d42e7dSPeter Dunlap } 1802a6d42e7dSPeter Dunlap 1803a6d42e7dSPeter Dunlap static 1804a6d42e7dSPeter Dunlap sm_audit_record_t * 1805a6d42e7dSPeter Dunlap idm_sm_audit_common(sm_audit_buf_t *audit_buf, sm_audit_record_type_t r_type, 1806a6d42e7dSPeter Dunlap sm_audit_sm_type_t sm_type, 1807a6d42e7dSPeter Dunlap int current_state) 1808a6d42e7dSPeter Dunlap { 1809a6d42e7dSPeter Dunlap sm_audit_record_t *sar; 1810a6d42e7dSPeter Dunlap 1811a6d42e7dSPeter Dunlap sar = audit_buf->sab_records; 1812a6d42e7dSPeter Dunlap sar += audit_buf->sab_index; 1813a6d42e7dSPeter Dunlap audit_buf->sab_index++; 1814a6d42e7dSPeter Dunlap audit_buf->sab_index &= audit_buf->sab_max_index; 1815a6d42e7dSPeter Dunlap 1816a6d42e7dSPeter Dunlap sar->sar_type = r_type; 1817a6d42e7dSPeter Dunlap gethrestime(&sar->sar_timestamp); 1818a6d42e7dSPeter Dunlap sar->sar_sm_type = sm_type; 1819a6d42e7dSPeter Dunlap sar->sar_state = current_state; 1820a6d42e7dSPeter Dunlap 1821a6d42e7dSPeter Dunlap return (sar); 1822a6d42e7dSPeter Dunlap } 1823a6d42e7dSPeter Dunlap 1824a6d42e7dSPeter Dunlap void 1825a6d42e7dSPeter Dunlap idm_sm_audit_event(sm_audit_buf_t *audit_buf, 1826a6d42e7dSPeter Dunlap sm_audit_sm_type_t sm_type, int current_state, 1827a6d42e7dSPeter Dunlap int event, uintptr_t event_info) 1828a6d42e7dSPeter Dunlap { 1829a6d42e7dSPeter Dunlap sm_audit_record_t *sar; 1830a6d42e7dSPeter Dunlap 1831a6d42e7dSPeter Dunlap sar = idm_sm_audit_common(audit_buf, SAR_STATE_EVENT, 1832a6d42e7dSPeter Dunlap sm_type, current_state); 1833a6d42e7dSPeter Dunlap sar->sar_event = event; 1834a6d42e7dSPeter Dunlap sar->sar_event_info = event_info; 1835a6d42e7dSPeter Dunlap } 1836a6d42e7dSPeter Dunlap 1837a6d42e7dSPeter Dunlap void 1838a6d42e7dSPeter Dunlap idm_sm_audit_state_change(sm_audit_buf_t *audit_buf, 1839a6d42e7dSPeter Dunlap sm_audit_sm_type_t sm_type, int current_state, int new_state) 1840a6d42e7dSPeter Dunlap { 1841a6d42e7dSPeter Dunlap sm_audit_record_t *sar; 1842a6d42e7dSPeter Dunlap 1843a6d42e7dSPeter Dunlap sar = idm_sm_audit_common(audit_buf, SAR_STATE_CHANGE, 1844a6d42e7dSPeter Dunlap sm_type, current_state); 1845a6d42e7dSPeter Dunlap sar->sar_new_state = new_state; 1846a6d42e7dSPeter Dunlap } 1847a6d42e7dSPeter Dunlap 1848a6d42e7dSPeter Dunlap 1849a6d42e7dSPeter Dunlap /* 1850a6d42e7dSPeter Dunlap * Object reference tracking 1851a6d42e7dSPeter Dunlap */ 1852a6d42e7dSPeter Dunlap 1853a6d42e7dSPeter Dunlap void 1854a6d42e7dSPeter Dunlap idm_refcnt_init(idm_refcnt_t *refcnt, void *referenced_obj) 1855a6d42e7dSPeter Dunlap { 1856a6d42e7dSPeter Dunlap bzero(refcnt, sizeof (*refcnt)); 1857a6d42e7dSPeter Dunlap idm_refcnt_reset(refcnt); 1858a6d42e7dSPeter Dunlap refcnt->ir_referenced_obj = referenced_obj; 1859a6d42e7dSPeter Dunlap bzero(&refcnt->ir_audit_buf, sizeof (refcnt_audit_buf_t)); 1860a6d42e7dSPeter Dunlap refcnt->ir_audit_buf.anb_max_index = REFCNT_AUDIT_BUF_MAX_REC - 1; 1861a6d42e7dSPeter Dunlap mutex_init(&refcnt->ir_mutex, NULL, MUTEX_DEFAULT, NULL); 1862a6d42e7dSPeter Dunlap cv_init(&refcnt->ir_cv, NULL, CV_DEFAULT, NULL); 1863a6d42e7dSPeter Dunlap } 1864a6d42e7dSPeter Dunlap 1865a6d42e7dSPeter Dunlap void 1866a6d42e7dSPeter Dunlap idm_refcnt_destroy(idm_refcnt_t *refcnt) 1867a6d42e7dSPeter Dunlap { 1868a6d42e7dSPeter Dunlap ASSERT(refcnt->ir_refcnt == 0); 1869a6d42e7dSPeter Dunlap cv_destroy(&refcnt->ir_cv); 1870a6d42e7dSPeter Dunlap mutex_destroy(&refcnt->ir_mutex); 1871a6d42e7dSPeter Dunlap } 1872a6d42e7dSPeter Dunlap 1873a6d42e7dSPeter Dunlap void 1874a6d42e7dSPeter Dunlap idm_refcnt_reset(idm_refcnt_t *refcnt) 1875a6d42e7dSPeter Dunlap { 1876a6d42e7dSPeter Dunlap refcnt->ir_waiting = REF_NOWAIT; 1877a6d42e7dSPeter Dunlap refcnt->ir_refcnt = 0; 1878a6d42e7dSPeter Dunlap } 1879a6d42e7dSPeter Dunlap 1880a6d42e7dSPeter Dunlap void 1881a6d42e7dSPeter Dunlap idm_refcnt_hold(idm_refcnt_t *refcnt) 1882a6d42e7dSPeter Dunlap { 1883a6d42e7dSPeter Dunlap /* 1884a6d42e7dSPeter Dunlap * Nothing should take a hold on an object after a call to 1885a6d42e7dSPeter Dunlap * idm_refcnt_wait_ref or idm_refcnd_async_wait_ref 1886a6d42e7dSPeter Dunlap */ 1887a6d42e7dSPeter Dunlap ASSERT(refcnt->ir_waiting == REF_NOWAIT); 1888a6d42e7dSPeter Dunlap 1889a6d42e7dSPeter Dunlap mutex_enter(&refcnt->ir_mutex); 1890a6d42e7dSPeter Dunlap refcnt->ir_refcnt++; 1891a6d42e7dSPeter Dunlap REFCNT_AUDIT(refcnt); 1892a6d42e7dSPeter Dunlap mutex_exit(&refcnt->ir_mutex); 1893a6d42e7dSPeter Dunlap } 1894a6d42e7dSPeter Dunlap 1895a6d42e7dSPeter Dunlap static void 1896a6d42e7dSPeter Dunlap idm_refcnt_unref_task(void *refcnt_void) 1897a6d42e7dSPeter Dunlap { 1898a6d42e7dSPeter Dunlap idm_refcnt_t *refcnt = refcnt_void; 1899a6d42e7dSPeter Dunlap 1900a6d42e7dSPeter Dunlap REFCNT_AUDIT(refcnt); 1901a6d42e7dSPeter Dunlap (*refcnt->ir_cb)(refcnt->ir_referenced_obj); 1902a6d42e7dSPeter Dunlap } 1903a6d42e7dSPeter Dunlap 1904a6d42e7dSPeter Dunlap void 1905a6d42e7dSPeter Dunlap idm_refcnt_rele(idm_refcnt_t *refcnt) 1906a6d42e7dSPeter Dunlap { 1907a6d42e7dSPeter Dunlap mutex_enter(&refcnt->ir_mutex); 1908a6d42e7dSPeter Dunlap ASSERT(refcnt->ir_refcnt > 0); 1909a6d42e7dSPeter Dunlap refcnt->ir_refcnt--; 1910a6d42e7dSPeter Dunlap REFCNT_AUDIT(refcnt); 1911a6d42e7dSPeter Dunlap if (refcnt->ir_waiting == REF_NOWAIT) { 1912a6d42e7dSPeter Dunlap /* No one is waiting on this object */ 1913a6d42e7dSPeter Dunlap mutex_exit(&refcnt->ir_mutex); 1914a6d42e7dSPeter Dunlap return; 1915a6d42e7dSPeter Dunlap } 1916a6d42e7dSPeter Dunlap 1917a6d42e7dSPeter Dunlap /* 1918a6d42e7dSPeter Dunlap * Someone is waiting for this object to go idle so check if 1919a6d42e7dSPeter Dunlap * refcnt is 0. Waiting on an object then later grabbing another 1920a6d42e7dSPeter Dunlap * reference is not allowed so we don't need to handle that case. 1921a6d42e7dSPeter Dunlap */ 1922a6d42e7dSPeter Dunlap if (refcnt->ir_refcnt == 0) { 1923a6d42e7dSPeter Dunlap if (refcnt->ir_waiting == REF_WAIT_ASYNC) { 1924a6d42e7dSPeter Dunlap if (taskq_dispatch(idm.idm_global_taskq, 1925a6d42e7dSPeter Dunlap &idm_refcnt_unref_task, refcnt, TQ_SLEEP) == NULL) { 1926a6d42e7dSPeter Dunlap cmn_err(CE_WARN, 1927a6d42e7dSPeter Dunlap "idm_refcnt_rele: Couldn't dispatch task"); 1928a6d42e7dSPeter Dunlap } 1929a6d42e7dSPeter Dunlap } else if (refcnt->ir_waiting == REF_WAIT_SYNC) { 1930a6d42e7dSPeter Dunlap cv_signal(&refcnt->ir_cv); 1931a6d42e7dSPeter Dunlap } 1932a6d42e7dSPeter Dunlap } 1933a6d42e7dSPeter Dunlap mutex_exit(&refcnt->ir_mutex); 1934a6d42e7dSPeter Dunlap } 1935a6d42e7dSPeter Dunlap 1936a6d42e7dSPeter Dunlap void 1937a6d42e7dSPeter Dunlap idm_refcnt_rele_and_destroy(idm_refcnt_t *refcnt, idm_refcnt_cb_t *cb_func) 1938a6d42e7dSPeter Dunlap { 1939a6d42e7dSPeter Dunlap mutex_enter(&refcnt->ir_mutex); 1940a6d42e7dSPeter Dunlap ASSERT(refcnt->ir_refcnt > 0); 1941a6d42e7dSPeter Dunlap refcnt->ir_refcnt--; 1942a6d42e7dSPeter Dunlap REFCNT_AUDIT(refcnt); 1943a6d42e7dSPeter Dunlap 1944a6d42e7dSPeter Dunlap /* 1945a6d42e7dSPeter Dunlap * Someone is waiting for this object to go idle so check if 1946a6d42e7dSPeter Dunlap * refcnt is 0. Waiting on an object then later grabbing another 1947a6d42e7dSPeter Dunlap * reference is not allowed so we don't need to handle that case. 1948a6d42e7dSPeter Dunlap */ 1949a6d42e7dSPeter Dunlap if (refcnt->ir_refcnt == 0) { 1950a6d42e7dSPeter Dunlap refcnt->ir_cb = cb_func; 1951a6d42e7dSPeter Dunlap refcnt->ir_waiting = REF_WAIT_ASYNC; 1952a6d42e7dSPeter Dunlap if (taskq_dispatch(idm.idm_global_taskq, 1953a6d42e7dSPeter Dunlap &idm_refcnt_unref_task, refcnt, TQ_SLEEP) == NULL) { 1954a6d42e7dSPeter Dunlap cmn_err(CE_WARN, 1955a6d42e7dSPeter Dunlap "idm_refcnt_rele: Couldn't dispatch task"); 1956a6d42e7dSPeter Dunlap } 1957a6d42e7dSPeter Dunlap } 1958a6d42e7dSPeter Dunlap mutex_exit(&refcnt->ir_mutex); 1959a6d42e7dSPeter Dunlap } 1960a6d42e7dSPeter Dunlap 1961a6d42e7dSPeter Dunlap void 1962a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(idm_refcnt_t *refcnt) 1963a6d42e7dSPeter Dunlap { 1964a6d42e7dSPeter Dunlap mutex_enter(&refcnt->ir_mutex); 1965a6d42e7dSPeter Dunlap refcnt->ir_waiting = REF_WAIT_SYNC; 1966a6d42e7dSPeter Dunlap REFCNT_AUDIT(refcnt); 1967a6d42e7dSPeter Dunlap while (refcnt->ir_refcnt != 0) 1968a6d42e7dSPeter Dunlap cv_wait(&refcnt->ir_cv, &refcnt->ir_mutex); 1969a6d42e7dSPeter Dunlap mutex_exit(&refcnt->ir_mutex); 1970a6d42e7dSPeter Dunlap } 1971a6d42e7dSPeter Dunlap 1972a6d42e7dSPeter Dunlap void 1973a6d42e7dSPeter Dunlap idm_refcnt_async_wait_ref(idm_refcnt_t *refcnt, idm_refcnt_cb_t *cb_func) 1974a6d42e7dSPeter Dunlap { 1975a6d42e7dSPeter Dunlap mutex_enter(&refcnt->ir_mutex); 1976a6d42e7dSPeter Dunlap refcnt->ir_waiting = REF_WAIT_ASYNC; 1977a6d42e7dSPeter Dunlap refcnt->ir_cb = cb_func; 1978a6d42e7dSPeter Dunlap REFCNT_AUDIT(refcnt); 1979a6d42e7dSPeter Dunlap /* 1980a6d42e7dSPeter Dunlap * It's possible we don't have any references. To make things easier 1981a6d42e7dSPeter Dunlap * on the caller use a taskq to call the callback instead of 1982a6d42e7dSPeter Dunlap * calling it synchronously 1983a6d42e7dSPeter Dunlap */ 1984a6d42e7dSPeter Dunlap if (refcnt->ir_refcnt == 0) { 1985a6d42e7dSPeter Dunlap if (taskq_dispatch(idm.idm_global_taskq, 1986a6d42e7dSPeter Dunlap &idm_refcnt_unref_task, refcnt, TQ_SLEEP) == NULL) { 1987a6d42e7dSPeter Dunlap cmn_err(CE_WARN, 1988a6d42e7dSPeter Dunlap "idm_refcnt_async_wait_ref: " 1989a6d42e7dSPeter Dunlap "Couldn't dispatch task"); 1990a6d42e7dSPeter Dunlap } 1991a6d42e7dSPeter Dunlap } 1992a6d42e7dSPeter Dunlap mutex_exit(&refcnt->ir_mutex); 1993a6d42e7dSPeter Dunlap } 1994a6d42e7dSPeter Dunlap 1995a6d42e7dSPeter Dunlap void 1996a6d42e7dSPeter Dunlap idm_refcnt_destroy_unref_obj(idm_refcnt_t *refcnt, 1997a6d42e7dSPeter Dunlap idm_refcnt_cb_t *cb_func) 1998a6d42e7dSPeter Dunlap { 1999a6d42e7dSPeter Dunlap mutex_enter(&refcnt->ir_mutex); 2000a6d42e7dSPeter Dunlap if (refcnt->ir_refcnt == 0) { 2001a6d42e7dSPeter Dunlap mutex_exit(&refcnt->ir_mutex); 2002a6d42e7dSPeter Dunlap (*cb_func)(refcnt->ir_referenced_obj); 2003a6d42e7dSPeter Dunlap return; 2004a6d42e7dSPeter Dunlap } 2005a6d42e7dSPeter Dunlap mutex_exit(&refcnt->ir_mutex); 2006a6d42e7dSPeter Dunlap } 2007a6d42e7dSPeter Dunlap 2008a6d42e7dSPeter Dunlap void 2009a6d42e7dSPeter Dunlap idm_conn_hold(idm_conn_t *ic) 2010a6d42e7dSPeter Dunlap { 2011a6d42e7dSPeter Dunlap idm_refcnt_hold(&ic->ic_refcnt); 2012a6d42e7dSPeter Dunlap } 2013a6d42e7dSPeter Dunlap 2014a6d42e7dSPeter Dunlap void 2015a6d42e7dSPeter Dunlap idm_conn_rele(idm_conn_t *ic) 2016a6d42e7dSPeter Dunlap { 2017a6d42e7dSPeter Dunlap idm_refcnt_rele(&ic->ic_refcnt); 2018a6d42e7dSPeter Dunlap } 2019a6d42e7dSPeter Dunlap 2020a6d42e7dSPeter Dunlap 2021a6d42e7dSPeter Dunlap static int 2022a6d42e7dSPeter Dunlap _idm_init(void) 2023a6d42e7dSPeter Dunlap { 2024a6d42e7dSPeter Dunlap /* Initialize the rwlock for the taskid table */ 2025a6d42e7dSPeter Dunlap rw_init(&idm.idm_taskid_table_lock, NULL, RW_DRIVER, NULL); 2026a6d42e7dSPeter Dunlap 2027a6d42e7dSPeter Dunlap /* Initialize the global mutex and taskq */ 2028a6d42e7dSPeter Dunlap mutex_init(&idm.idm_global_mutex, NULL, MUTEX_DEFAULT, NULL); 2029a6d42e7dSPeter Dunlap 2030a6d42e7dSPeter Dunlap cv_init(&idm.idm_tgt_svc_cv, NULL, CV_DEFAULT, NULL); 2031a6d42e7dSPeter Dunlap cv_init(&idm.idm_wd_cv, NULL, CV_DEFAULT, NULL); 2032a6d42e7dSPeter Dunlap 2033a6d42e7dSPeter Dunlap idm.idm_global_taskq = taskq_create("idm_global_taskq", 1, minclsyspri, 2034a6d42e7dSPeter Dunlap 4, 4, TASKQ_PREPOPULATE); 2035a6d42e7dSPeter Dunlap if (idm.idm_global_taskq == NULL) { 2036a6d42e7dSPeter Dunlap cv_destroy(&idm.idm_wd_cv); 2037a6d42e7dSPeter Dunlap cv_destroy(&idm.idm_tgt_svc_cv); 2038a6d42e7dSPeter Dunlap mutex_destroy(&idm.idm_global_mutex); 2039a6d42e7dSPeter Dunlap rw_destroy(&idm.idm_taskid_table_lock); 2040a6d42e7dSPeter Dunlap return (ENOMEM); 2041a6d42e7dSPeter Dunlap } 2042a6d42e7dSPeter Dunlap 2043*a41f9819SJames Moore /* Start watchdog thread */ 2044a6d42e7dSPeter Dunlap idm.idm_wd_thread = thread_create(NULL, 0, 2045a6d42e7dSPeter Dunlap idm_wd_thread, NULL, 0, &p0, TS_RUN, minclsyspri); 2046a6d42e7dSPeter Dunlap if (idm.idm_wd_thread == NULL) { 2047a6d42e7dSPeter Dunlap /* Couldn't create the watchdog thread */ 2048a6d42e7dSPeter Dunlap taskq_destroy(idm.idm_global_taskq); 2049a6d42e7dSPeter Dunlap cv_destroy(&idm.idm_wd_cv); 2050a6d42e7dSPeter Dunlap cv_destroy(&idm.idm_tgt_svc_cv); 2051a6d42e7dSPeter Dunlap mutex_destroy(&idm.idm_global_mutex); 2052a6d42e7dSPeter Dunlap rw_destroy(&idm.idm_taskid_table_lock); 2053a6d42e7dSPeter Dunlap return (ENOMEM); 2054a6d42e7dSPeter Dunlap } 2055a6d42e7dSPeter Dunlap 2056*a41f9819SJames Moore /* Pause until the watchdog thread is running */ 2057a6d42e7dSPeter Dunlap mutex_enter(&idm.idm_global_mutex); 2058a6d42e7dSPeter Dunlap while (!idm.idm_wd_thread_running) 2059a6d42e7dSPeter Dunlap cv_wait(&idm.idm_wd_cv, &idm.idm_global_mutex); 2060a6d42e7dSPeter Dunlap mutex_exit(&idm.idm_global_mutex); 2061a6d42e7dSPeter Dunlap 2062a6d42e7dSPeter Dunlap /* 2063a6d42e7dSPeter Dunlap * Allocate the task ID table and set "next" to 0. 2064a6d42e7dSPeter Dunlap */ 2065a6d42e7dSPeter Dunlap 2066a6d42e7dSPeter Dunlap idm.idm_taskid_max = idm_max_taskids; 2067a6d42e7dSPeter Dunlap idm.idm_taskid_table = (idm_task_t **) 2068a6d42e7dSPeter Dunlap kmem_zalloc(idm.idm_taskid_max * sizeof (idm_task_t *), KM_SLEEP); 2069a6d42e7dSPeter Dunlap idm.idm_taskid_next = 0; 2070a6d42e7dSPeter Dunlap 2071a6d42e7dSPeter Dunlap /* Create the global buffer and task kmem caches */ 2072a6d42e7dSPeter Dunlap idm.idm_buf_cache = kmem_cache_create("idm_buf_cache", 2073a6d42e7dSPeter Dunlap sizeof (idm_buf_t), 8, NULL, NULL, NULL, NULL, NULL, KM_SLEEP); 2074a6d42e7dSPeter Dunlap 2075a6d42e7dSPeter Dunlap /* 2076a6d42e7dSPeter Dunlap * Note, we're explicitly allocating an additional iSER header- 2077a6d42e7dSPeter Dunlap * sized chunk for each of these elements. See idm_task_constructor(). 2078a6d42e7dSPeter Dunlap */ 2079a6d42e7dSPeter Dunlap idm.idm_task_cache = kmem_cache_create("idm_task_cache", 2080a6d42e7dSPeter Dunlap sizeof (idm_task_t) + IDM_TRANSPORT_HEADER_LENGTH, 8, 2081a6d42e7dSPeter Dunlap &idm_task_constructor, &idm_task_destructor, 2082a6d42e7dSPeter Dunlap NULL, NULL, NULL, KM_SLEEP); 2083a6d42e7dSPeter Dunlap 2084a6d42e7dSPeter Dunlap /* Create the service and connection context lists */ 2085a6d42e7dSPeter Dunlap list_create(&idm.idm_tgt_svc_list, sizeof (idm_svc_t), 2086a6d42e7dSPeter Dunlap offsetof(idm_svc_t, is_list_node)); 2087a6d42e7dSPeter Dunlap list_create(&idm.idm_tgt_conn_list, sizeof (idm_conn_t), 2088a6d42e7dSPeter Dunlap offsetof(idm_conn_t, ic_list_node)); 2089a6d42e7dSPeter Dunlap list_create(&idm.idm_ini_conn_list, sizeof (idm_conn_t), 2090a6d42e7dSPeter Dunlap offsetof(idm_conn_t, ic_list_node)); 2091a6d42e7dSPeter Dunlap 2092a6d42e7dSPeter Dunlap /* Initialize the native sockets transport */ 2093a6d42e7dSPeter Dunlap idm_so_init(&idm_transport_list[IDM_TRANSPORT_TYPE_SOCKETS]); 2094a6d42e7dSPeter Dunlap 2095a6d42e7dSPeter Dunlap /* Create connection ID pool */ 2096a6d42e7dSPeter Dunlap (void) idm_idpool_create(&idm.idm_conn_id_pool); 2097a6d42e7dSPeter Dunlap 2098a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 2099a6d42e7dSPeter Dunlap } 2100a6d42e7dSPeter Dunlap 2101a6d42e7dSPeter Dunlap static int 2102a6d42e7dSPeter Dunlap _idm_fini(void) 2103a6d42e7dSPeter Dunlap { 2104a6d42e7dSPeter Dunlap if (!list_is_empty(&idm.idm_ini_conn_list) || 2105a6d42e7dSPeter Dunlap !list_is_empty(&idm.idm_tgt_conn_list) || 2106a6d42e7dSPeter Dunlap !list_is_empty(&idm.idm_tgt_svc_list)) { 2107a6d42e7dSPeter Dunlap return (EBUSY); 2108a6d42e7dSPeter Dunlap } 2109a6d42e7dSPeter Dunlap 2110a6d42e7dSPeter Dunlap mutex_enter(&idm.idm_global_mutex); 2111a6d42e7dSPeter Dunlap idm.idm_wd_thread_running = B_FALSE; 2112a6d42e7dSPeter Dunlap cv_signal(&idm.idm_wd_cv); 2113a6d42e7dSPeter Dunlap mutex_exit(&idm.idm_global_mutex); 2114a6d42e7dSPeter Dunlap 2115a6d42e7dSPeter Dunlap thread_join(idm.idm_wd_thread_did); 2116a6d42e7dSPeter Dunlap 2117a6d42e7dSPeter Dunlap idm_idpool_destroy(&idm.idm_conn_id_pool); 2118a6d42e7dSPeter Dunlap idm_so_fini(); 2119a6d42e7dSPeter Dunlap list_destroy(&idm.idm_ini_conn_list); 2120a6d42e7dSPeter Dunlap list_destroy(&idm.idm_tgt_conn_list); 2121a6d42e7dSPeter Dunlap list_destroy(&idm.idm_tgt_svc_list); 2122a6d42e7dSPeter Dunlap kmem_cache_destroy(idm.idm_task_cache); 2123a6d42e7dSPeter Dunlap kmem_cache_destroy(idm.idm_buf_cache); 2124a6d42e7dSPeter Dunlap kmem_free(idm.idm_taskid_table, 2125a6d42e7dSPeter Dunlap idm.idm_taskid_max * sizeof (idm_task_t *)); 2126a6d42e7dSPeter Dunlap mutex_destroy(&idm.idm_global_mutex); 2127a6d42e7dSPeter Dunlap cv_destroy(&idm.idm_wd_cv); 2128a6d42e7dSPeter Dunlap cv_destroy(&idm.idm_tgt_svc_cv); 2129a6d42e7dSPeter Dunlap rw_destroy(&idm.idm_taskid_table_lock); 2130a6d42e7dSPeter Dunlap 2131a6d42e7dSPeter Dunlap return (0); 2132a6d42e7dSPeter Dunlap } 2133