1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2003 Silicon Graphics International Corp. 5 * Copyright (c) 2014-2017 Alexander Motin <mav@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification. 14 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 15 * substantially similar to the "NO WARRANTY" disclaimer below 16 * ("Disclaimer") and any redistribution must be conditioned upon 17 * including a substantially similar Disclaimer requirement for further 18 * binary redistribution. 19 * 20 * NO WARRANTY 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 29 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGES. 32 * 33 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_frontend.c#4 $ 34 */ 35 /* 36 * CAM Target Layer front end interface code 37 * 38 * Author: Ken Merry <ken@FreeBSD.org> 39 */ 40 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/types.h> 48 #include <sys/malloc.h> 49 #include <sys/lock.h> 50 #include <sys/mutex.h> 51 #include <sys/condvar.h> 52 #include <sys/endian.h> 53 #include <sys/queue.h> 54 #include <sys/sysctl.h> 55 56 #include <cam/scsi/scsi_all.h> 57 #include <cam/scsi/scsi_da.h> 58 #include <cam/ctl/ctl_io.h> 59 #include <cam/ctl/ctl.h> 60 #include <cam/ctl/ctl_frontend.h> 61 #include <cam/ctl/ctl_backend.h> 62 /* XXX KDM move defines from ctl_ioctl.h to somewhere else */ 63 #include <cam/ctl/ctl_ioctl.h> 64 #include <cam/ctl/ctl_ha.h> 65 #include <cam/ctl/ctl_private.h> 66 #include <cam/ctl/ctl_debug.h> 67 68 extern struct ctl_softc *control_softc; 69 70 int 71 ctl_frontend_register(struct ctl_frontend *fe) 72 { 73 struct ctl_softc *softc = control_softc; 74 struct ctl_frontend *fe_tmp; 75 int error; 76 77 KASSERT(softc != NULL, ("CTL is not initialized")); 78 79 /* Sanity check, make sure this isn't a duplicate registration. */ 80 mtx_lock(&softc->ctl_lock); 81 STAILQ_FOREACH(fe_tmp, &softc->fe_list, links) { 82 if (strcmp(fe_tmp->name, fe->name) == 0) { 83 mtx_unlock(&softc->ctl_lock); 84 return (-1); 85 } 86 } 87 mtx_unlock(&softc->ctl_lock); 88 STAILQ_INIT(&fe->port_list); 89 90 /* Call the frontend's initialization routine. */ 91 if (fe->init != NULL) { 92 if ((error = fe->init()) != 0) { 93 printf("%s frontend init error: %d\n", 94 fe->name, error); 95 return (error); 96 } 97 } 98 99 mtx_lock(&softc->ctl_lock); 100 softc->num_frontends++; 101 STAILQ_INSERT_TAIL(&softc->fe_list, fe, links); 102 mtx_unlock(&softc->ctl_lock); 103 return (0); 104 } 105 106 int 107 ctl_frontend_deregister(struct ctl_frontend *fe) 108 { 109 struct ctl_softc *softc = control_softc; 110 int error; 111 112 /* Call the frontend's shutdown routine.*/ 113 if (fe->shutdown != NULL) { 114 if ((error = fe->shutdown()) != 0) { 115 printf("%s frontend shutdown error: %d\n", 116 fe->name, error); 117 return (error); 118 } 119 } 120 121 mtx_lock(&softc->ctl_lock); 122 STAILQ_REMOVE(&softc->fe_list, fe, ctl_frontend, links); 123 softc->num_frontends--; 124 mtx_unlock(&softc->ctl_lock); 125 return (0); 126 } 127 128 struct ctl_frontend * 129 ctl_frontend_find(char *frontend_name) 130 { 131 struct ctl_softc *softc = control_softc; 132 struct ctl_frontend *fe; 133 134 mtx_lock(&softc->ctl_lock); 135 STAILQ_FOREACH(fe, &softc->fe_list, links) { 136 if (strcmp(fe->name, frontend_name) == 0) { 137 mtx_unlock(&softc->ctl_lock); 138 return (fe); 139 } 140 } 141 mtx_unlock(&softc->ctl_lock); 142 return (NULL); 143 } 144 145 int 146 ctl_port_register(struct ctl_port *port) 147 { 148 struct ctl_softc *softc = control_softc; 149 struct ctl_port *tport, *nport; 150 void *pool; 151 int port_num; 152 int retval; 153 154 KASSERT(softc != NULL, ("CTL is not initialized")); 155 port->ctl_softc = softc; 156 157 mtx_lock(&softc->ctl_lock); 158 if (port->targ_port >= 0) 159 port_num = port->targ_port; 160 else 161 port_num = ctl_ffz(softc->ctl_port_mask, 162 softc->port_min, softc->port_max); 163 if ((port_num < 0) || 164 (ctl_set_mask(softc->ctl_port_mask, port_num) < 0)) { 165 mtx_unlock(&softc->ctl_lock); 166 return (1); 167 } 168 softc->num_ports++; 169 mtx_unlock(&softc->ctl_lock); 170 171 /* 172 * Initialize the initiator and portname mappings 173 */ 174 port->max_initiators = CTL_MAX_INIT_PER_PORT; 175 port->wwpn_iid = malloc(sizeof(*port->wwpn_iid) * port->max_initiators, 176 M_CTL, M_NOWAIT | M_ZERO); 177 if (port->wwpn_iid == NULL) { 178 retval = ENOMEM; 179 goto error; 180 } 181 182 /* 183 * We add 20 to whatever the caller requests, so he doesn't get 184 * burned by queueing things back to the pending sense queue. In 185 * theory, there should probably only be one outstanding item, at 186 * most, on the pending sense queue for a LUN. We'll clear the 187 * pending sense queue on the next command, whether or not it is 188 * a REQUEST SENSE. 189 */ 190 retval = ctl_pool_create(softc, port->port_name, 191 port->num_requested_ctl_io + 20, &pool); 192 if (retval != 0) { 193 free(port->wwpn_iid, M_CTL); 194 error: 195 port->targ_port = -1; 196 mtx_lock(&softc->ctl_lock); 197 ctl_clear_mask(softc->ctl_port_mask, port_num); 198 mtx_unlock(&softc->ctl_lock); 199 return (retval); 200 } 201 port->targ_port = port_num; 202 port->ctl_pool_ref = pool; 203 if (port->options.stqh_first == NULL) 204 STAILQ_INIT(&port->options); 205 port->stats.item = port_num; 206 mtx_init(&port->port_lock, "CTL port", NULL, MTX_DEF); 207 208 mtx_lock(&softc->ctl_lock); 209 STAILQ_INSERT_TAIL(&port->frontend->port_list, port, fe_links); 210 for (tport = NULL, nport = STAILQ_FIRST(&softc->port_list); 211 nport != NULL && nport->targ_port < port_num; 212 tport = nport, nport = STAILQ_NEXT(tport, links)) { 213 } 214 if (tport) 215 STAILQ_INSERT_AFTER(&softc->port_list, tport, port, links); 216 else 217 STAILQ_INSERT_HEAD(&softc->port_list, port, links); 218 softc->ctl_ports[port->targ_port] = port; 219 mtx_unlock(&softc->ctl_lock); 220 221 return (retval); 222 } 223 224 int 225 ctl_port_deregister(struct ctl_port *port) 226 { 227 struct ctl_softc *softc = port->ctl_softc; 228 struct ctl_io_pool *pool = (struct ctl_io_pool *)port->ctl_pool_ref; 229 int i; 230 231 if (port->targ_port == -1) 232 return (1); 233 234 mtx_lock(&softc->ctl_lock); 235 STAILQ_REMOVE(&softc->port_list, port, ctl_port, links); 236 STAILQ_REMOVE(&port->frontend->port_list, port, ctl_port, fe_links); 237 softc->num_ports--; 238 ctl_clear_mask(softc->ctl_port_mask, port->targ_port); 239 softc->ctl_ports[port->targ_port] = NULL; 240 mtx_unlock(&softc->ctl_lock); 241 242 ctl_pool_free(pool); 243 ctl_free_opts(&port->options); 244 245 ctl_lun_map_deinit(port); 246 free(port->port_devid, M_CTL); 247 port->port_devid = NULL; 248 free(port->target_devid, M_CTL); 249 port->target_devid = NULL; 250 free(port->init_devid, M_CTL); 251 port->init_devid = NULL; 252 for (i = 0; i < port->max_initiators; i++) 253 free(port->wwpn_iid[i].name, M_CTL); 254 free(port->wwpn_iid, M_CTL); 255 mtx_destroy(&port->port_lock); 256 257 return (0); 258 } 259 260 void 261 ctl_port_set_wwns(struct ctl_port *port, int wwnn_valid, uint64_t wwnn, 262 int wwpn_valid, uint64_t wwpn) 263 { 264 struct scsi_vpd_id_descriptor *desc; 265 int len, proto; 266 267 if (port->port_type == CTL_PORT_FC) 268 proto = SCSI_PROTO_FC << 4; 269 else if (port->port_type == CTL_PORT_SAS) 270 proto = SCSI_PROTO_SAS << 4; 271 else if (port->port_type == CTL_PORT_ISCSI) 272 proto = SCSI_PROTO_ISCSI << 4; 273 else 274 proto = SCSI_PROTO_SPI << 4; 275 276 if (wwnn_valid) { 277 port->wwnn = wwnn; 278 279 free(port->target_devid, M_CTL); 280 281 len = sizeof(struct scsi_vpd_device_id) + CTL_WWPN_LEN; 282 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 283 M_CTL, M_WAITOK | M_ZERO); 284 port->target_devid->len = len; 285 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 286 desc->proto_codeset = proto | SVPD_ID_CODESET_BINARY; 287 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 288 SVPD_ID_TYPE_NAA; 289 desc->length = CTL_WWPN_LEN; 290 scsi_u64to8b(port->wwnn, desc->identifier); 291 } 292 293 if (wwpn_valid) { 294 port->wwpn = wwpn; 295 296 free(port->port_devid, M_CTL); 297 298 len = sizeof(struct scsi_vpd_device_id) + CTL_WWPN_LEN; 299 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 300 M_CTL, M_WAITOK | M_ZERO); 301 port->port_devid->len = len; 302 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 303 desc->proto_codeset = proto | SVPD_ID_CODESET_BINARY; 304 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 305 SVPD_ID_TYPE_NAA; 306 desc->length = CTL_WWPN_LEN; 307 scsi_u64to8b(port->wwpn, desc->identifier); 308 } 309 } 310 311 void 312 ctl_port_online(struct ctl_port *port) 313 { 314 struct ctl_softc *softc = port->ctl_softc; 315 struct ctl_lun *lun; 316 const char *value; 317 uint32_t l; 318 319 if (port->lun_enable != NULL) { 320 if (port->lun_map) { 321 for (l = 0; l < port->lun_map_size; l++) { 322 if (ctl_lun_map_from_port(port, l) == 323 UINT32_MAX) 324 continue; 325 port->lun_enable(port->targ_lun_arg, l); 326 } 327 } else { 328 STAILQ_FOREACH(lun, &softc->lun_list, links) 329 port->lun_enable(port->targ_lun_arg, lun->lun); 330 } 331 } 332 if (port->port_online != NULL) 333 port->port_online(port->onoff_arg); 334 mtx_lock(&softc->ctl_lock); 335 if (softc->is_single == 0) { 336 value = ctl_get_opt(&port->options, "ha_shared"); 337 if (value != NULL && strcmp(value, "on") == 0) 338 port->status |= CTL_PORT_STATUS_HA_SHARED; 339 else 340 port->status &= ~CTL_PORT_STATUS_HA_SHARED; 341 } 342 port->status |= CTL_PORT_STATUS_ONLINE; 343 STAILQ_FOREACH(lun, &softc->lun_list, links) { 344 if (ctl_lun_map_to_port(port, lun->lun) == UINT32_MAX) 345 continue; 346 mtx_lock(&lun->lun_lock); 347 ctl_est_ua_all(lun, -1, CTL_UA_INQ_CHANGE); 348 mtx_unlock(&lun->lun_lock); 349 } 350 mtx_unlock(&softc->ctl_lock); 351 ctl_isc_announce_port(port); 352 } 353 354 void 355 ctl_port_offline(struct ctl_port *port) 356 { 357 struct ctl_softc *softc = port->ctl_softc; 358 struct ctl_lun *lun; 359 uint32_t l; 360 361 if (port->port_offline != NULL) 362 port->port_offline(port->onoff_arg); 363 if (port->lun_disable != NULL) { 364 if (port->lun_map) { 365 for (l = 0; l < port->lun_map_size; l++) { 366 if (ctl_lun_map_from_port(port, l) == 367 UINT32_MAX) 368 continue; 369 port->lun_disable(port->targ_lun_arg, l); 370 } 371 } else { 372 STAILQ_FOREACH(lun, &softc->lun_list, links) 373 port->lun_disable(port->targ_lun_arg, lun->lun); 374 } 375 } 376 mtx_lock(&softc->ctl_lock); 377 port->status &= ~CTL_PORT_STATUS_ONLINE; 378 STAILQ_FOREACH(lun, &softc->lun_list, links) { 379 if (ctl_lun_map_to_port(port, lun->lun) == UINT32_MAX) 380 continue; 381 mtx_lock(&lun->lun_lock); 382 ctl_est_ua_all(lun, -1, CTL_UA_INQ_CHANGE); 383 mtx_unlock(&lun->lun_lock); 384 } 385 mtx_unlock(&softc->ctl_lock); 386 ctl_isc_announce_port(port); 387 } 388 389 /* 390 * vim: ts=8 391 */ 392