1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #include <sys/nv.h> 56 #include <sys/dnv.h> 57 58 #include <cam/scsi/scsi_all.h> 59 #include <cam/scsi/scsi_da.h> 60 #include <cam/ctl/ctl_io.h> 61 #include <cam/ctl/ctl.h> 62 #include <cam/ctl/ctl_frontend.h> 63 #include <cam/ctl/ctl_backend.h> 64 /* XXX KDM move defines from ctl_ioctl.h to somewhere else */ 65 #include <cam/ctl/ctl_ioctl.h> 66 #include <cam/ctl/ctl_ha.h> 67 #include <cam/ctl/ctl_private.h> 68 #include <cam/ctl/ctl_debug.h> 69 70 extern struct ctl_softc *control_softc; 71 72 int 73 ctl_frontend_register(struct ctl_frontend *fe) 74 { 75 struct ctl_softc *softc = control_softc; 76 struct ctl_frontend *fe_tmp; 77 int error; 78 79 KASSERT(softc != NULL, ("CTL is not initialized")); 80 81 /* Sanity check, make sure this isn't a duplicate registration. */ 82 mtx_lock(&softc->ctl_lock); 83 STAILQ_FOREACH(fe_tmp, &softc->fe_list, links) { 84 if (strcmp(fe_tmp->name, fe->name) == 0) { 85 mtx_unlock(&softc->ctl_lock); 86 return (-1); 87 } 88 } 89 mtx_unlock(&softc->ctl_lock); 90 STAILQ_INIT(&fe->port_list); 91 92 /* Call the frontend's initialization routine. */ 93 if (fe->init != NULL) { 94 if ((error = fe->init()) != 0) { 95 printf("%s frontend init error: %d\n", 96 fe->name, error); 97 return (error); 98 } 99 } 100 101 mtx_lock(&softc->ctl_lock); 102 softc->num_frontends++; 103 STAILQ_INSERT_TAIL(&softc->fe_list, fe, links); 104 mtx_unlock(&softc->ctl_lock); 105 return (0); 106 } 107 108 int 109 ctl_frontend_deregister(struct ctl_frontend *fe) 110 { 111 struct ctl_softc *softc = control_softc; 112 int error; 113 114 /* Call the frontend's shutdown routine.*/ 115 if (fe->shutdown != NULL) { 116 if ((error = fe->shutdown()) != 0) { 117 printf("%s frontend shutdown error: %d\n", 118 fe->name, error); 119 return (error); 120 } 121 } 122 123 mtx_lock(&softc->ctl_lock); 124 STAILQ_REMOVE(&softc->fe_list, fe, ctl_frontend, links); 125 softc->num_frontends--; 126 mtx_unlock(&softc->ctl_lock); 127 return (0); 128 } 129 130 struct ctl_frontend * 131 ctl_frontend_find(char *frontend_name) 132 { 133 struct ctl_softc *softc = control_softc; 134 struct ctl_frontend *fe; 135 136 mtx_lock(&softc->ctl_lock); 137 STAILQ_FOREACH(fe, &softc->fe_list, links) { 138 if (strcmp(fe->name, frontend_name) == 0) { 139 mtx_unlock(&softc->ctl_lock); 140 return (fe); 141 } 142 } 143 mtx_unlock(&softc->ctl_lock); 144 return (NULL); 145 } 146 147 int 148 ctl_port_register(struct ctl_port *port) 149 { 150 struct ctl_softc *softc = control_softc; 151 struct ctl_port *tport, *nport; 152 void *pool; 153 int port_num; 154 int retval; 155 156 KASSERT(softc != NULL, ("CTL is not initialized")); 157 port->ctl_softc = softc; 158 159 mtx_lock(&softc->ctl_lock); 160 if (port->targ_port >= 0) 161 port_num = port->targ_port; 162 else 163 port_num = ctl_ffz(softc->ctl_port_mask, 164 softc->port_min, softc->port_max); 165 if ((port_num < 0) || 166 (ctl_set_mask(softc->ctl_port_mask, port_num) < 0)) { 167 mtx_unlock(&softc->ctl_lock); 168 return (1); 169 } 170 softc->num_ports++; 171 mtx_unlock(&softc->ctl_lock); 172 173 /* 174 * Initialize the initiator and portname mappings 175 */ 176 port->max_initiators = CTL_MAX_INIT_PER_PORT; 177 port->wwpn_iid = malloc(sizeof(*port->wwpn_iid) * port->max_initiators, 178 M_CTL, M_NOWAIT | M_ZERO); 179 if (port->wwpn_iid == NULL) { 180 retval = ENOMEM; 181 goto error; 182 } 183 184 /* 185 * We add 20 to whatever the caller requests, so he doesn't get 186 * burned by queueing things back to the pending sense queue. In 187 * theory, there should probably only be one outstanding item, at 188 * most, on the pending sense queue for a LUN. We'll clear the 189 * pending sense queue on the next command, whether or not it is 190 * a REQUEST SENSE. 191 */ 192 retval = ctl_pool_create(softc, port->port_name, 193 port->num_requested_ctl_io + 20, &pool); 194 if (retval != 0) { 195 free(port->wwpn_iid, M_CTL); 196 error: 197 port->targ_port = -1; 198 mtx_lock(&softc->ctl_lock); 199 ctl_clear_mask(softc->ctl_port_mask, port_num); 200 mtx_unlock(&softc->ctl_lock); 201 return (retval); 202 } 203 port->targ_port = port_num; 204 port->ctl_pool_ref = pool; 205 if (port->options == NULL) 206 port->options = nvlist_create(0); 207 port->stats.item = port_num; 208 mtx_init(&port->port_lock, "CTL port", NULL, MTX_DEF); 209 210 mtx_lock(&softc->ctl_lock); 211 STAILQ_INSERT_TAIL(&port->frontend->port_list, port, fe_links); 212 for (tport = NULL, nport = STAILQ_FIRST(&softc->port_list); 213 nport != NULL && nport->targ_port < port_num; 214 tport = nport, nport = STAILQ_NEXT(tport, links)) { 215 } 216 if (tport) 217 STAILQ_INSERT_AFTER(&softc->port_list, tport, port, links); 218 else 219 STAILQ_INSERT_HEAD(&softc->port_list, port, links); 220 softc->ctl_ports[port->targ_port] = port; 221 mtx_unlock(&softc->ctl_lock); 222 223 return (retval); 224 } 225 226 int 227 ctl_port_deregister(struct ctl_port *port) 228 { 229 struct ctl_softc *softc = port->ctl_softc; 230 struct ctl_io_pool *pool = (struct ctl_io_pool *)port->ctl_pool_ref; 231 int i; 232 233 if (port->targ_port == -1) 234 return (1); 235 236 mtx_lock(&softc->ctl_lock); 237 STAILQ_REMOVE(&softc->port_list, port, ctl_port, links); 238 STAILQ_REMOVE(&port->frontend->port_list, port, ctl_port, fe_links); 239 softc->num_ports--; 240 ctl_clear_mask(softc->ctl_port_mask, port->targ_port); 241 softc->ctl_ports[port->targ_port] = NULL; 242 mtx_unlock(&softc->ctl_lock); 243 244 ctl_pool_free(pool); 245 nvlist_destroy(port->options); 246 247 ctl_lun_map_deinit(port); 248 free(port->port_devid, M_CTL); 249 port->port_devid = NULL; 250 free(port->target_devid, M_CTL); 251 port->target_devid = NULL; 252 free(port->init_devid, M_CTL); 253 port->init_devid = NULL; 254 for (i = 0; i < port->max_initiators; i++) 255 free(port->wwpn_iid[i].name, M_CTL); 256 free(port->wwpn_iid, M_CTL); 257 mtx_destroy(&port->port_lock); 258 259 return (0); 260 } 261 262 void 263 ctl_port_set_wwns(struct ctl_port *port, int wwnn_valid, uint64_t wwnn, 264 int wwpn_valid, uint64_t wwpn) 265 { 266 struct scsi_vpd_id_descriptor *desc; 267 int len, proto; 268 269 if (port->port_type == CTL_PORT_FC) 270 proto = SCSI_PROTO_FC << 4; 271 else if (port->port_type == CTL_PORT_SAS) 272 proto = SCSI_PROTO_SAS << 4; 273 else if (port->port_type == CTL_PORT_ISCSI) 274 proto = SCSI_PROTO_ISCSI << 4; 275 else 276 proto = SCSI_PROTO_SPI << 4; 277 278 if (wwnn_valid) { 279 port->wwnn = wwnn; 280 281 free(port->target_devid, M_CTL); 282 283 len = sizeof(struct scsi_vpd_device_id) + CTL_WWPN_LEN; 284 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 285 M_CTL, M_WAITOK | M_ZERO); 286 port->target_devid->len = len; 287 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 288 desc->proto_codeset = proto | SVPD_ID_CODESET_BINARY; 289 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 290 SVPD_ID_TYPE_NAA; 291 desc->length = CTL_WWPN_LEN; 292 scsi_u64to8b(port->wwnn, desc->identifier); 293 } 294 295 if (wwpn_valid) { 296 port->wwpn = wwpn; 297 298 free(port->port_devid, M_CTL); 299 300 len = sizeof(struct scsi_vpd_device_id) + CTL_WWPN_LEN; 301 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 302 M_CTL, M_WAITOK | M_ZERO); 303 port->port_devid->len = len; 304 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 305 desc->proto_codeset = proto | SVPD_ID_CODESET_BINARY; 306 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 307 SVPD_ID_TYPE_NAA; 308 desc->length = CTL_WWPN_LEN; 309 scsi_u64to8b(port->wwpn, desc->identifier); 310 } 311 } 312 313 void 314 ctl_port_online(struct ctl_port *port) 315 { 316 struct ctl_softc *softc = port->ctl_softc; 317 struct ctl_lun *lun; 318 const char *value; 319 uint32_t l; 320 321 if (port->lun_enable != NULL) { 322 if (port->lun_map) { 323 for (l = 0; l < port->lun_map_size; l++) { 324 if (ctl_lun_map_from_port(port, l) == 325 UINT32_MAX) 326 continue; 327 port->lun_enable(port->targ_lun_arg, l); 328 } 329 } else { 330 STAILQ_FOREACH(lun, &softc->lun_list, links) 331 port->lun_enable(port->targ_lun_arg, lun->lun); 332 } 333 } 334 if (port->port_online != NULL) 335 port->port_online(port->onoff_arg); 336 mtx_lock(&softc->ctl_lock); 337 if (softc->is_single == 0) { 338 value = dnvlist_get_string(port->options, "ha_shared", NULL); 339 if (value != NULL && strcmp(value, "on") == 0) 340 port->status |= CTL_PORT_STATUS_HA_SHARED; 341 else 342 port->status &= ~CTL_PORT_STATUS_HA_SHARED; 343 } 344 port->status |= CTL_PORT_STATUS_ONLINE; 345 STAILQ_FOREACH(lun, &softc->lun_list, links) { 346 if (ctl_lun_map_to_port(port, lun->lun) == UINT32_MAX) 347 continue; 348 mtx_lock(&lun->lun_lock); 349 ctl_est_ua_all(lun, -1, CTL_UA_INQ_CHANGE); 350 mtx_unlock(&lun->lun_lock); 351 } 352 mtx_unlock(&softc->ctl_lock); 353 ctl_isc_announce_port(port); 354 } 355 356 void 357 ctl_port_offline(struct ctl_port *port) 358 { 359 struct ctl_softc *softc = port->ctl_softc; 360 struct ctl_lun *lun; 361 uint32_t l; 362 363 if (port->port_offline != NULL) 364 port->port_offline(port->onoff_arg); 365 if (port->lun_disable != NULL) { 366 if (port->lun_map) { 367 for (l = 0; l < port->lun_map_size; l++) { 368 if (ctl_lun_map_from_port(port, l) == 369 UINT32_MAX) 370 continue; 371 port->lun_disable(port->targ_lun_arg, l); 372 } 373 } else { 374 STAILQ_FOREACH(lun, &softc->lun_list, links) 375 port->lun_disable(port->targ_lun_arg, lun->lun); 376 } 377 } 378 mtx_lock(&softc->ctl_lock); 379 port->status &= ~CTL_PORT_STATUS_ONLINE; 380 STAILQ_FOREACH(lun, &softc->lun_list, links) { 381 if (ctl_lun_map_to_port(port, lun->lun) == UINT32_MAX) 382 continue; 383 mtx_lock(&lun->lun_lock); 384 ctl_est_ua_all(lun, -1, CTL_UA_INQ_CHANGE); 385 mtx_unlock(&lun->lun_lock); 386 } 387 mtx_unlock(&softc->ctl_lock); 388 ctl_isc_announce_port(port); 389 } 390 391 /* 392 * vim: ts=8 393 */ 394