1 /*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 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 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 /* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/param.h> 40 #include <sys/capsicum.h> 41 #include <sys/condvar.h> 42 #include <sys/endian.h> 43 #include <sys/file.h> 44 #include <sys/kernel.h> 45 #include <sys/kthread.h> 46 #include <sys/lock.h> 47 #include <sys/malloc.h> 48 #include <sys/module.h> 49 #include <sys/mutex.h> 50 #include <sys/queue.h> 51 #include <sys/sbuf.h> 52 #include <sys/socket.h> 53 #include <sys/sysctl.h> 54 #include <sys/systm.h> 55 #include <sys/uio.h> 56 #include <sys/unistd.h> 57 #include <vm/uma.h> 58 59 #include <cam/scsi/scsi_all.h> 60 #include <cam/scsi/scsi_da.h> 61 #include <cam/ctl/ctl_io.h> 62 #include <cam/ctl/ctl.h> 63 #include <cam/ctl/ctl_backend.h> 64 #include <cam/ctl/ctl_error.h> 65 #include <cam/ctl/ctl_frontend.h> 66 #include <cam/ctl/ctl_debug.h> 67 #include <cam/ctl/ctl_ha.h> 68 #include <cam/ctl/ctl_ioctl.h> 69 #include <cam/ctl/ctl_private.h> 70 71 #include <dev/iscsi/icl.h> 72 #include <dev/iscsi/icl_wrappers.h> 73 #include <dev/iscsi/iscsi_proto.h> 74 #include <cam/ctl/ctl_frontend_iscsi.h> 75 76 #ifdef ICL_KERNEL_PROXY 77 #include <sys/socketvar.h> 78 #endif 79 80 #ifdef ICL_KERNEL_PROXY 81 FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 82 #endif 83 84 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 85 static uma_zone_t cfiscsi_data_wait_zone; 86 87 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 88 "CAM Target Layer iSCSI Frontend"); 89 static int debug = 1; 90 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 91 &debug, 1, "Enable debug messages"); 92 static int ping_timeout = 5; 93 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95 static int login_timeout = 60; 96 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 97 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 98 static int maxtags = 256; 99 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxtags, CTLFLAG_RWTUN, 100 &maxtags, 0, "Max number of requests queued by initiator"); 101 102 #define CFISCSI_DEBUG(X, ...) \ 103 do { \ 104 if (debug > 1) { \ 105 printf("%s: " X "\n", \ 106 __func__, ## __VA_ARGS__); \ 107 } \ 108 } while (0) 109 110 #define CFISCSI_WARN(X, ...) \ 111 do { \ 112 if (debug > 0) { \ 113 printf("WARNING: %s: " X "\n", \ 114 __func__, ## __VA_ARGS__); \ 115 } \ 116 } while (0) 117 118 #define CFISCSI_SESSION_DEBUG(S, X, ...) \ 119 do { \ 120 if (debug > 1) { \ 121 printf("%s: %s (%s): " X "\n", \ 122 __func__, S->cs_initiator_addr, \ 123 S->cs_initiator_name, ## __VA_ARGS__); \ 124 } \ 125 } while (0) 126 127 #define CFISCSI_SESSION_WARN(S, X, ...) \ 128 do { \ 129 if (debug > 0) { \ 130 printf("WARNING: %s (%s): " X "\n", \ 131 S->cs_initiator_addr, \ 132 S->cs_initiator_name, ## __VA_ARGS__); \ 133 } \ 134 } while (0) 135 136 #define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 137 #define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 138 #define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 139 140 #define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 141 #define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 142 #define PDU_EXPDATASN(X) (X)->ip_prv0 143 #define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 144 #define PDU_R2TSN(X) (X)->ip_prv2 145 146 static int cfiscsi_init(void); 147 static int cfiscsi_shutdown(void); 148 static void cfiscsi_online(void *arg); 149 static void cfiscsi_offline(void *arg); 150 static int cfiscsi_info(void *arg, struct sbuf *sb); 151 static int cfiscsi_ioctl(struct cdev *dev, 152 u_long cmd, caddr_t addr, int flag, struct thread *td); 153 static void cfiscsi_datamove(union ctl_io *io); 154 static void cfiscsi_datamove_in(union ctl_io *io); 155 static void cfiscsi_datamove_out(union ctl_io *io); 156 static void cfiscsi_done(union ctl_io *io); 157 static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 158 static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 159 static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 160 static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 161 static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 162 static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 163 static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 164 static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 165 struct cfiscsi_session *cs, union ctl_io *io, 166 uint32_t initiator_task_tag, 167 uint32_t *target_transfer_tagp); 168 static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 169 struct cfiscsi_data_wait *cdw); 170 static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 171 *softc, const char *name, uint16_t tag); 172 static struct cfiscsi_target *cfiscsi_target_find_or_create( 173 struct cfiscsi_softc *softc, const char *name, const char *alias, 174 uint16_t tag); 175 static void cfiscsi_target_release(struct cfiscsi_target *ct); 176 static void cfiscsi_session_delete(struct cfiscsi_session *cs); 177 178 static struct cfiscsi_softc cfiscsi_softc; 179 180 static struct ctl_frontend cfiscsi_frontend = 181 { 182 .name = "iscsi", 183 .init = cfiscsi_init, 184 .ioctl = cfiscsi_ioctl, 185 .shutdown = cfiscsi_shutdown, 186 }; 187 CTL_FRONTEND_DECLARE(cfiscsi, cfiscsi_frontend); 188 MODULE_DEPEND(cfiscsi, icl, 1, 1, 1); 189 190 static struct icl_pdu * 191 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 192 { 193 194 return (icl_pdu_new(request->ip_conn, flags)); 195 } 196 197 static bool 198 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 199 { 200 const struct iscsi_bhs_scsi_command *bhssc; 201 struct cfiscsi_session *cs; 202 uint32_t cmdsn, expstatsn; 203 204 cs = PDU_SESSION(request); 205 206 /* 207 * Every incoming PDU - not just NOP-Out - resets the ping timer. 208 * The purpose of the timeout is to reset the connection when it stalls; 209 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 210 * in some queue. 211 * 212 * XXX: Locking? 213 */ 214 cs->cs_timeout = 0; 215 216 /* 217 * Data-Out PDUs don't contain CmdSN. 218 */ 219 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 220 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 221 return (false); 222 223 /* 224 * We're only using fields common for all the request 225 * (initiator -> target) PDUs. 226 */ 227 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 228 cmdsn = ntohl(bhssc->bhssc_cmdsn); 229 expstatsn = ntohl(bhssc->bhssc_expstatsn); 230 231 CFISCSI_SESSION_LOCK(cs); 232 #if 0 233 if (expstatsn != cs->cs_statsn) { 234 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 235 "while current StatSN is %d", expstatsn, 236 cs->cs_statsn); 237 } 238 #endif 239 240 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 241 /* 242 * The target MUST silently ignore any non-immediate command 243 * outside of this range. 244 */ 245 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 246 ISCSI_SNGT(cmdsn, cs->cs_cmdsn - 1 + maxtags)) { 247 CFISCSI_SESSION_UNLOCK(cs); 248 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 249 "while expected %u", cmdsn, cs->cs_cmdsn); 250 return (true); 251 } 252 253 /* 254 * We don't support multiple connections now, so any 255 * discontinuity in CmdSN means lost PDUs. Since we don't 256 * support PDU retransmission -- terminate the connection. 257 */ 258 if (cmdsn != cs->cs_cmdsn) { 259 CFISCSI_SESSION_UNLOCK(cs); 260 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 261 "while expected %u; dropping connection", 262 cmdsn, cs->cs_cmdsn); 263 cfiscsi_session_terminate(cs); 264 return (true); 265 } 266 cs->cs_cmdsn++; 267 } 268 269 CFISCSI_SESSION_UNLOCK(cs); 270 271 return (false); 272 } 273 274 static void 275 cfiscsi_pdu_handle(struct icl_pdu *request) 276 { 277 struct cfiscsi_session *cs; 278 bool ignore; 279 280 cs = PDU_SESSION(request); 281 282 ignore = cfiscsi_pdu_update_cmdsn(request); 283 if (ignore) { 284 icl_pdu_free(request); 285 return; 286 } 287 288 /* 289 * Handle the PDU; this includes e.g. receiving the remaining 290 * part of PDU and submitting the SCSI command to CTL 291 * or queueing a reply. The handling routine is responsible 292 * for freeing the PDU when it's no longer needed. 293 */ 294 switch (request->ip_bhs->bhs_opcode & 295 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 296 case ISCSI_BHS_OPCODE_NOP_OUT: 297 cfiscsi_pdu_handle_nop_out(request); 298 break; 299 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 300 cfiscsi_pdu_handle_scsi_command(request); 301 break; 302 case ISCSI_BHS_OPCODE_TASK_REQUEST: 303 cfiscsi_pdu_handle_task_request(request); 304 break; 305 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 306 cfiscsi_pdu_handle_data_out(request); 307 break; 308 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 309 cfiscsi_pdu_handle_logout_request(request); 310 break; 311 default: 312 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 313 "opcode 0x%x; dropping connection", 314 request->ip_bhs->bhs_opcode); 315 icl_pdu_free(request); 316 cfiscsi_session_terminate(cs); 317 } 318 319 } 320 321 static void 322 cfiscsi_receive_callback(struct icl_pdu *request) 323 { 324 struct cfiscsi_session *cs; 325 326 cs = PDU_SESSION(request); 327 328 #ifdef ICL_KERNEL_PROXY 329 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 330 if (cs->cs_login_pdu == NULL) 331 cs->cs_login_pdu = request; 332 else 333 icl_pdu_free(request); 334 cv_signal(&cs->cs_login_cv); 335 return; 336 } 337 #endif 338 339 cfiscsi_pdu_handle(request); 340 } 341 342 static void 343 cfiscsi_error_callback(struct icl_conn *ic) 344 { 345 struct cfiscsi_session *cs; 346 347 cs = CONN_SESSION(ic); 348 349 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 350 cfiscsi_session_terminate(cs); 351 } 352 353 static int 354 cfiscsi_pdu_prepare(struct icl_pdu *response) 355 { 356 struct cfiscsi_session *cs; 357 struct iscsi_bhs_scsi_response *bhssr; 358 bool advance_statsn = true; 359 360 cs = PDU_SESSION(response); 361 362 CFISCSI_SESSION_LOCK_ASSERT(cs); 363 364 /* 365 * We're only using fields common for all the response 366 * (target -> initiator) PDUs. 367 */ 368 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 369 370 /* 371 * 10.8.3: "The StatSN for this connection is not advanced 372 * after this PDU is sent." 373 */ 374 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 375 advance_statsn = false; 376 377 /* 378 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 379 * StatSN for the connection is not advanced after this PDU is sent." 380 */ 381 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 382 bhssr->bhssr_initiator_task_tag == 0xffffffff) 383 advance_statsn = false; 384 385 /* 386 * See the comment below - StatSN is not meaningful and must 387 * not be advanced. 388 */ 389 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 390 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 391 advance_statsn = false; 392 393 /* 394 * 10.7.3: "The fields StatSN, Status, and Residual Count 395 * only have meaningful content if the S bit is set to 1." 396 */ 397 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 398 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 399 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 400 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 401 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn - 1 + 402 imax(0, maxtags - cs->cs_outstanding_ctl_pdus)); 403 404 if (advance_statsn) 405 cs->cs_statsn++; 406 407 return (0); 408 } 409 410 static void 411 cfiscsi_pdu_queue(struct icl_pdu *response) 412 { 413 struct cfiscsi_session *cs; 414 415 cs = PDU_SESSION(response); 416 417 CFISCSI_SESSION_LOCK(cs); 418 cfiscsi_pdu_prepare(response); 419 icl_pdu_queue(response); 420 CFISCSI_SESSION_UNLOCK(cs); 421 } 422 423 static void 424 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 425 { 426 struct cfiscsi_session *cs; 427 struct iscsi_bhs_nop_out *bhsno; 428 struct iscsi_bhs_nop_in *bhsni; 429 struct icl_pdu *response; 430 void *data = NULL; 431 size_t datasize; 432 int error; 433 434 cs = PDU_SESSION(request); 435 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 436 437 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 438 /* 439 * Nothing to do, iscsi_pdu_update_statsn() already 440 * zeroed the timeout. 441 */ 442 icl_pdu_free(request); 443 return; 444 } 445 446 datasize = icl_pdu_data_segment_length(request); 447 if (datasize > 0) { 448 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 449 if (data == NULL) { 450 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 451 "dropping connection"); 452 icl_pdu_free(request); 453 cfiscsi_session_terminate(cs); 454 return; 455 } 456 icl_pdu_get_data(request, 0, data, datasize); 457 } 458 459 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 460 if (response == NULL) { 461 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 462 "droppping connection"); 463 free(data, M_CFISCSI); 464 icl_pdu_free(request); 465 cfiscsi_session_terminate(cs); 466 return; 467 } 468 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 469 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 470 bhsni->bhsni_flags = 0x80; 471 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 472 bhsni->bhsni_target_transfer_tag = 0xffffffff; 473 if (datasize > 0) { 474 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 475 if (error != 0) { 476 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 477 "dropping connection"); 478 free(data, M_CFISCSI); 479 icl_pdu_free(request); 480 icl_pdu_free(response); 481 cfiscsi_session_terminate(cs); 482 return; 483 } 484 free(data, M_CFISCSI); 485 } 486 487 icl_pdu_free(request); 488 cfiscsi_pdu_queue(response); 489 } 490 491 static void 492 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 493 { 494 struct iscsi_bhs_scsi_command *bhssc; 495 struct cfiscsi_session *cs; 496 union ctl_io *io; 497 int error; 498 499 cs = PDU_SESSION(request); 500 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 501 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 502 // bhssc->bhssc_initiator_task_tag); 503 504 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 505 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 506 "ImmediateData=No; dropping connection"); 507 icl_pdu_free(request); 508 cfiscsi_session_terminate(cs); 509 return; 510 } 511 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 512 ctl_zero_io(io); 513 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 514 io->io_hdr.io_type = CTL_IO_SCSI; 515 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 516 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 517 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 518 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 519 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 520 case BHSSC_FLAGS_ATTR_UNTAGGED: 521 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 522 break; 523 case BHSSC_FLAGS_ATTR_SIMPLE: 524 io->scsiio.tag_type = CTL_TAG_SIMPLE; 525 break; 526 case BHSSC_FLAGS_ATTR_ORDERED: 527 io->scsiio.tag_type = CTL_TAG_ORDERED; 528 break; 529 case BHSSC_FLAGS_ATTR_HOQ: 530 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 531 break; 532 case BHSSC_FLAGS_ATTR_ACA: 533 io->scsiio.tag_type = CTL_TAG_ACA; 534 break; 535 default: 536 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 537 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 538 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 539 break; 540 } 541 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 542 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 543 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 544 error = ctl_queue(io); 545 if (error != CTL_RETVAL_COMPLETE) { 546 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 547 "dropping connection", error); 548 ctl_free_io(io); 549 refcount_release(&cs->cs_outstanding_ctl_pdus); 550 icl_pdu_free(request); 551 cfiscsi_session_terminate(cs); 552 } 553 } 554 555 static void 556 cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 557 { 558 struct iscsi_bhs_task_management_request *bhstmr; 559 struct iscsi_bhs_task_management_response *bhstmr2; 560 struct icl_pdu *response; 561 struct cfiscsi_session *cs; 562 union ctl_io *io; 563 int error; 564 565 cs = PDU_SESSION(request); 566 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 567 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 568 ctl_zero_io(io); 569 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 570 io->io_hdr.io_type = CTL_IO_TASK; 571 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 572 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 573 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 574 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 575 576 switch (bhstmr->bhstmr_function & ~0x80) { 577 case BHSTMR_FUNCTION_ABORT_TASK: 578 #if 0 579 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 580 #endif 581 io->taskio.task_action = CTL_TASK_ABORT_TASK; 582 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 583 break; 584 case BHSTMR_FUNCTION_ABORT_TASK_SET: 585 #if 0 586 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 587 #endif 588 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 589 break; 590 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 591 #if 0 592 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 593 #endif 594 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 595 break; 596 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 597 #if 0 598 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 599 #endif 600 io->taskio.task_action = CTL_TASK_LUN_RESET; 601 break; 602 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 603 #if 0 604 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 605 #endif 606 io->taskio.task_action = CTL_TASK_TARGET_RESET; 607 break; 608 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 609 #if 0 610 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 611 #endif 612 io->taskio.task_action = CTL_TASK_TARGET_RESET; 613 break; 614 case BHSTMR_FUNCTION_QUERY_TASK: 615 #if 0 616 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 617 #endif 618 io->taskio.task_action = CTL_TASK_QUERY_TASK; 619 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 620 break; 621 case BHSTMR_FUNCTION_QUERY_TASK_SET: 622 #if 0 623 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 624 #endif 625 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 626 break; 627 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 628 #if 0 629 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 630 #endif 631 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 632 break; 633 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 634 #if 0 635 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 636 #endif 637 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 638 break; 639 default: 640 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 641 bhstmr->bhstmr_function & ~0x80); 642 ctl_free_io(io); 643 644 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 645 if (response == NULL) { 646 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 647 "dropping connection"); 648 icl_pdu_free(request); 649 cfiscsi_session_terminate(cs); 650 return; 651 } 652 bhstmr2 = (struct iscsi_bhs_task_management_response *) 653 response->ip_bhs; 654 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 655 bhstmr2->bhstmr_flags = 0x80; 656 bhstmr2->bhstmr_response = 657 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 658 bhstmr2->bhstmr_initiator_task_tag = 659 bhstmr->bhstmr_initiator_task_tag; 660 icl_pdu_free(request); 661 cfiscsi_pdu_queue(response); 662 return; 663 } 664 665 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 666 error = ctl_queue(io); 667 if (error != CTL_RETVAL_COMPLETE) { 668 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 669 "dropping connection", error); 670 ctl_free_io(io); 671 refcount_release(&cs->cs_outstanding_ctl_pdus); 672 icl_pdu_free(request); 673 cfiscsi_session_terminate(cs); 674 } 675 } 676 677 static bool 678 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 679 { 680 struct iscsi_bhs_data_out *bhsdo; 681 struct cfiscsi_session *cs; 682 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 683 size_t copy_len, len, off, buffer_offset; 684 int ctl_sg_count; 685 union ctl_io *io; 686 687 cs = PDU_SESSION(request); 688 689 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 690 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 691 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 692 ISCSI_BHS_OPCODE_SCSI_COMMAND, 693 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 694 695 /* 696 * We're only using fields common for Data-Out and SCSI Command PDUs. 697 */ 698 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 699 700 io = cdw->cdw_ctl_io; 701 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 702 ("CTL_FLAG_DATA_IN")); 703 704 #if 0 705 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 706 request->ip_data_len, io->scsiio.kern_total_len); 707 #endif 708 709 if (io->scsiio.kern_sg_entries > 0) { 710 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 711 ctl_sg_count = io->scsiio.kern_sg_entries; 712 } else { 713 ctl_sglist = &ctl_sg_entry; 714 ctl_sglist->addr = io->scsiio.kern_data_ptr; 715 ctl_sglist->len = io->scsiio.kern_data_len; 716 ctl_sg_count = 1; 717 } 718 719 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 720 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 721 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 722 else 723 buffer_offset = 0; 724 len = icl_pdu_data_segment_length(request); 725 726 /* 727 * Make sure the offset, as sent by the initiator, matches the offset 728 * we're supposed to be at in the scatter-gather list. 729 */ 730 if (buffer_offset > 731 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 732 buffer_offset + len <= 733 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 734 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 735 "expected %zd; dropping connection", buffer_offset, 736 (size_t)io->scsiio.kern_rel_offset + 737 (size_t)io->scsiio.ext_data_filled); 738 ctl_set_data_phase_error(&io->scsiio); 739 cfiscsi_session_terminate(cs); 740 return (true); 741 } 742 743 /* 744 * This is the offset within the PDU data segment, as opposed 745 * to buffer_offset, which is the offset within the task (SCSI 746 * command). 747 */ 748 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 749 buffer_offset; 750 751 /* 752 * Iterate over the scatter/gather segments, filling them with data 753 * from the PDU data segment. Note that this can get called multiple 754 * times for one SCSI command; the cdw structure holds state for the 755 * scatter/gather list. 756 */ 757 for (;;) { 758 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 759 ("cdw->cdw_sg_index >= ctl_sg_count")); 760 if (cdw->cdw_sg_len == 0) { 761 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 762 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 763 } 764 KASSERT(off <= len, ("len > off")); 765 copy_len = len - off; 766 if (copy_len > cdw->cdw_sg_len) 767 copy_len = cdw->cdw_sg_len; 768 769 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 770 cdw->cdw_sg_addr += copy_len; 771 cdw->cdw_sg_len -= copy_len; 772 off += copy_len; 773 io->scsiio.ext_data_filled += copy_len; 774 io->scsiio.kern_data_resid -= copy_len; 775 776 if (cdw->cdw_sg_len == 0) { 777 /* 778 * End of current segment. 779 */ 780 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 781 /* 782 * Last segment in scatter/gather list. 783 */ 784 break; 785 } 786 cdw->cdw_sg_index++; 787 } 788 789 if (off == len) { 790 /* 791 * End of PDU payload. 792 */ 793 break; 794 } 795 } 796 797 if (len > off) { 798 /* 799 * In case of unsolicited data, it's possible that the buffer 800 * provided by CTL is smaller than negotiated FirstBurstLength. 801 * Just ignore the superfluous data; will ask for them with R2T 802 * on next call to cfiscsi_datamove(). 803 * 804 * This obviously can only happen with SCSI Command PDU. 805 */ 806 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 807 ISCSI_BHS_OPCODE_SCSI_COMMAND) 808 return (true); 809 810 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 811 "expected %zd; dropping connection", 812 icl_pdu_data_segment_length(request), off); 813 ctl_set_data_phase_error(&io->scsiio); 814 cfiscsi_session_terminate(cs); 815 return (true); 816 } 817 818 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 819 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 820 CFISCSI_SESSION_WARN(cs, "got the final packet without " 821 "the F flag; flags = 0x%x; dropping connection", 822 bhsdo->bhsdo_flags); 823 ctl_set_data_phase_error(&io->scsiio); 824 cfiscsi_session_terminate(cs); 825 return (true); 826 } 827 828 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 829 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 830 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 831 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 832 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 833 "transmitted size was %zd bytes instead of %d; " 834 "dropping connection", 835 (size_t)io->scsiio.ext_data_filled, 836 cdw->cdw_r2t_end); 837 ctl_set_data_phase_error(&io->scsiio); 838 cfiscsi_session_terminate(cs); 839 return (true); 840 } else { 841 /* 842 * For SCSI Command PDU, this just means we need to 843 * solicit more data by sending R2T. 844 */ 845 return (false); 846 } 847 } 848 849 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 850 #if 0 851 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 852 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 853 #endif 854 855 return (true); 856 } 857 858 return (false); 859 } 860 861 static void 862 cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 863 { 864 struct iscsi_bhs_data_out *bhsdo; 865 struct cfiscsi_session *cs; 866 struct cfiscsi_data_wait *cdw = NULL; 867 union ctl_io *io; 868 bool done; 869 870 cs = PDU_SESSION(request); 871 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 872 873 CFISCSI_SESSION_LOCK(cs); 874 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 875 #if 0 876 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 877 "ttt 0x%x, itt 0x%x", 878 bhsdo->bhsdo_target_transfer_tag, 879 bhsdo->bhsdo_initiator_task_tag, 880 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 881 #endif 882 if (bhsdo->bhsdo_target_transfer_tag == 883 cdw->cdw_target_transfer_tag) 884 break; 885 } 886 CFISCSI_SESSION_UNLOCK(cs); 887 if (cdw == NULL) { 888 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 889 "0x%x, not found; dropping connection", 890 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 891 icl_pdu_free(request); 892 cfiscsi_session_terminate(cs); 893 return; 894 } 895 896 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 897 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 898 "DataSN %u, while expected %u; dropping connection", 899 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 900 icl_pdu_free(request); 901 cfiscsi_session_terminate(cs); 902 return; 903 } 904 cdw->cdw_datasn++; 905 906 io = cdw->cdw_ctl_io; 907 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 908 ("CTL_FLAG_DATA_IN")); 909 910 done = cfiscsi_handle_data_segment(request, cdw); 911 if (done) { 912 CFISCSI_SESSION_LOCK(cs); 913 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 914 CFISCSI_SESSION_UNLOCK(cs); 915 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 916 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 917 cfiscsi_data_wait_free(cs, cdw); 918 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 919 if (done) 920 io->scsiio.be_move_done(io); 921 else 922 cfiscsi_datamove_out(io); 923 } 924 925 icl_pdu_free(request); 926 } 927 928 static void 929 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 930 { 931 struct iscsi_bhs_logout_request *bhslr; 932 struct iscsi_bhs_logout_response *bhslr2; 933 struct icl_pdu *response; 934 struct cfiscsi_session *cs; 935 936 cs = PDU_SESSION(request); 937 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 938 switch (bhslr->bhslr_reason & 0x7f) { 939 case BHSLR_REASON_CLOSE_SESSION: 940 case BHSLR_REASON_CLOSE_CONNECTION: 941 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 942 if (response == NULL) { 943 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 944 icl_pdu_free(request); 945 cfiscsi_session_terminate(cs); 946 return; 947 } 948 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 949 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 950 bhslr2->bhslr_flags = 0x80; 951 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 952 bhslr2->bhslr_initiator_task_tag = 953 bhslr->bhslr_initiator_task_tag; 954 icl_pdu_free(request); 955 cfiscsi_pdu_queue(response); 956 cfiscsi_session_terminate(cs); 957 break; 958 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 959 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 960 if (response == NULL) { 961 CFISCSI_SESSION_WARN(cs, 962 "failed to allocate memory; dropping connection"); 963 icl_pdu_free(request); 964 cfiscsi_session_terminate(cs); 965 return; 966 } 967 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 968 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 969 bhslr2->bhslr_flags = 0x80; 970 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 971 bhslr2->bhslr_initiator_task_tag = 972 bhslr->bhslr_initiator_task_tag; 973 icl_pdu_free(request); 974 cfiscsi_pdu_queue(response); 975 break; 976 default: 977 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 978 bhslr->bhslr_reason); 979 icl_pdu_free(request); 980 cfiscsi_session_terminate(cs); 981 break; 982 } 983 } 984 985 static void 986 cfiscsi_callout(void *context) 987 { 988 struct icl_pdu *cp; 989 struct iscsi_bhs_nop_in *bhsni; 990 struct cfiscsi_session *cs; 991 992 cs = context; 993 994 if (cs->cs_terminating) 995 return; 996 997 callout_schedule(&cs->cs_callout, 1 * hz); 998 999 atomic_add_int(&cs->cs_timeout, 1); 1000 1001 #ifdef ICL_KERNEL_PROXY 1002 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1003 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1004 CFISCSI_SESSION_WARN(cs, "login timed out after " 1005 "%d seconds; dropping connection", cs->cs_timeout); 1006 cfiscsi_session_terminate(cs); 1007 } 1008 return; 1009 } 1010 #endif 1011 1012 if (ping_timeout <= 0) { 1013 /* 1014 * Pings are disabled. Don't send NOP-In in this case; 1015 * user might have disabled pings to work around problems 1016 * with certain initiators that can't properly handle 1017 * NOP-In, such as iPXE. Reset the timeout, to avoid 1018 * triggering reconnection, should the user decide to 1019 * reenable them. 1020 */ 1021 cs->cs_timeout = 0; 1022 return; 1023 } 1024 1025 if (cs->cs_timeout >= ping_timeout) { 1026 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1027 "dropping connection", ping_timeout); 1028 cfiscsi_session_terminate(cs); 1029 return; 1030 } 1031 1032 /* 1033 * If the ping was reset less than one second ago - which means 1034 * that we've received some PDU during the last second - assume 1035 * the traffic flows correctly and don't bother sending a NOP-Out. 1036 * 1037 * (It's 2 - one for one second, and one for incrementing is_timeout 1038 * earlier in this routine.) 1039 */ 1040 if (cs->cs_timeout < 2) 1041 return; 1042 1043 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1044 if (cp == NULL) { 1045 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1046 return; 1047 } 1048 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1049 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1050 bhsni->bhsni_flags = 0x80; 1051 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1052 1053 cfiscsi_pdu_queue(cp); 1054 } 1055 1056 static struct cfiscsi_data_wait * 1057 cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1058 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1059 { 1060 struct cfiscsi_data_wait *cdw; 1061 int error; 1062 1063 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1064 if (cdw == NULL) { 1065 CFISCSI_SESSION_WARN(cs, 1066 "failed to allocate %zd bytes", sizeof(*cdw)); 1067 return (NULL); 1068 } 1069 1070 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1071 &cdw->cdw_icl_prv); 1072 if (error != 0) { 1073 CFISCSI_SESSION_WARN(cs, 1074 "icl_conn_transfer_setup() failed with error %d", error); 1075 uma_zfree(cfiscsi_data_wait_zone, cdw); 1076 return (NULL); 1077 } 1078 1079 cdw->cdw_ctl_io = io; 1080 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1081 cdw->cdw_initiator_task_tag = initiator_task_tag; 1082 1083 return (cdw); 1084 } 1085 1086 static void 1087 cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1088 struct cfiscsi_data_wait *cdw) 1089 { 1090 1091 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1092 uma_zfree(cfiscsi_data_wait_zone, cdw); 1093 } 1094 1095 static void 1096 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1097 { 1098 struct cfiscsi_data_wait *cdw; 1099 union ctl_io *io; 1100 int error, last, wait; 1101 1102 if (cs->cs_target == NULL) 1103 return; /* No target yet, so nothing to do. */ 1104 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1105 ctl_zero_io(io); 1106 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1107 io->io_hdr.io_type = CTL_IO_TASK; 1108 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1109 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1110 io->io_hdr.nexus.targ_lun = 0; 1111 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1112 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1113 wait = cs->cs_outstanding_ctl_pdus; 1114 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1115 error = ctl_queue(io); 1116 if (error != CTL_RETVAL_COMPLETE) { 1117 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1118 refcount_release(&cs->cs_outstanding_ctl_pdus); 1119 ctl_free_io(io); 1120 } 1121 1122 CFISCSI_SESSION_LOCK(cs); 1123 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1124 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1125 CFISCSI_SESSION_UNLOCK(cs); 1126 /* 1127 * Set nonzero port status; this prevents backends from 1128 * assuming that the data transfer actually succeeded 1129 * and writing uninitialized data to disk. 1130 */ 1131 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1132 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1133 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1134 cfiscsi_data_wait_free(cs, cdw); 1135 CFISCSI_SESSION_LOCK(cs); 1136 } 1137 CFISCSI_SESSION_UNLOCK(cs); 1138 1139 /* 1140 * Wait for CTL to terminate all the tasks. 1141 */ 1142 if (wait > 0) 1143 CFISCSI_SESSION_WARN(cs, 1144 "waiting for CTL to terminate %d tasks", wait); 1145 for (;;) { 1146 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1147 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1148 if (last != 0) 1149 break; 1150 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1151 0, "cfiscsi_terminate", hz / 100); 1152 } 1153 if (wait > 0) 1154 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1155 } 1156 1157 static void 1158 cfiscsi_maintenance_thread(void *arg) 1159 { 1160 struct cfiscsi_session *cs; 1161 1162 cs = arg; 1163 1164 for (;;) { 1165 CFISCSI_SESSION_LOCK(cs); 1166 if (cs->cs_terminating == false) 1167 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1168 CFISCSI_SESSION_UNLOCK(cs); 1169 1170 if (cs->cs_terminating) { 1171 1172 /* 1173 * We used to wait up to 30 seconds to deliver queued 1174 * PDUs to the initiator. We also tried hard to deliver 1175 * SCSI Responses for the aborted PDUs. We don't do 1176 * that anymore. We might need to revisit that. 1177 */ 1178 callout_drain(&cs->cs_callout); 1179 icl_conn_close(cs->cs_conn); 1180 1181 /* 1182 * At this point ICL receive thread is no longer 1183 * running; no new tasks can be queued. 1184 */ 1185 cfiscsi_session_terminate_tasks(cs); 1186 cfiscsi_session_delete(cs); 1187 kthread_exit(); 1188 return; 1189 } 1190 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1191 } 1192 } 1193 1194 static void 1195 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1196 { 1197 1198 if (cs->cs_terminating) 1199 return; 1200 cs->cs_terminating = true; 1201 cv_signal(&cs->cs_maintenance_cv); 1202 #ifdef ICL_KERNEL_PROXY 1203 cv_signal(&cs->cs_login_cv); 1204 #endif 1205 } 1206 1207 static int 1208 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1209 { 1210 struct cfiscsi_target *ct; 1211 char *name; 1212 int i; 1213 1214 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1215 1216 ct = cs->cs_target; 1217 name = strdup(cs->cs_initiator_id, M_CTL); 1218 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1219 if (i < 0) { 1220 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1221 i); 1222 cs->cs_ctl_initid = -1; 1223 return (1); 1224 } 1225 cs->cs_ctl_initid = i; 1226 #if 0 1227 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1228 #endif 1229 1230 return (0); 1231 } 1232 1233 static void 1234 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1235 { 1236 int error; 1237 1238 if (cs->cs_ctl_initid == -1) 1239 return; 1240 1241 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1242 if (error != 0) { 1243 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1244 error); 1245 } 1246 cs->cs_ctl_initid = -1; 1247 } 1248 1249 static struct cfiscsi_session * 1250 cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1251 { 1252 struct cfiscsi_session *cs; 1253 int error; 1254 1255 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1256 if (cs == NULL) { 1257 CFISCSI_WARN("malloc failed"); 1258 return (NULL); 1259 } 1260 cs->cs_ctl_initid = -1; 1261 1262 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1263 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1264 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1265 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1266 #ifdef ICL_KERNEL_PROXY 1267 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1268 #endif 1269 1270 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); 1271 if (cs->cs_conn == NULL) { 1272 free(cs, M_CFISCSI); 1273 return (NULL); 1274 } 1275 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1276 cs->cs_conn->ic_error = cfiscsi_error_callback; 1277 cs->cs_conn->ic_prv0 = cs; 1278 1279 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1280 if (error != 0) { 1281 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1282 free(cs, M_CFISCSI); 1283 return (NULL); 1284 } 1285 1286 mtx_lock(&softc->lock); 1287 cs->cs_id = ++softc->last_session_id; 1288 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1289 mtx_unlock(&softc->lock); 1290 1291 /* 1292 * Start pinging the initiator. 1293 */ 1294 callout_init(&cs->cs_callout, 1); 1295 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1296 1297 return (cs); 1298 } 1299 1300 static void 1301 cfiscsi_session_delete(struct cfiscsi_session *cs) 1302 { 1303 struct cfiscsi_softc *softc; 1304 1305 softc = &cfiscsi_softc; 1306 1307 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1308 ("destroying session with outstanding CTL pdus")); 1309 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1310 ("destroying session with non-empty queue")); 1311 1312 cfiscsi_session_unregister_initiator(cs); 1313 if (cs->cs_target != NULL) 1314 cfiscsi_target_release(cs->cs_target); 1315 icl_conn_close(cs->cs_conn); 1316 icl_conn_free(cs->cs_conn); 1317 1318 mtx_lock(&softc->lock); 1319 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1320 cv_signal(&softc->sessions_cv); 1321 mtx_unlock(&softc->lock); 1322 1323 free(cs, M_CFISCSI); 1324 } 1325 1326 static int 1327 cfiscsi_init(void) 1328 { 1329 struct cfiscsi_softc *softc; 1330 1331 softc = &cfiscsi_softc; 1332 bzero(softc, sizeof(*softc)); 1333 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1334 1335 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1336 #ifdef ICL_KERNEL_PROXY 1337 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1338 #endif 1339 TAILQ_INIT(&softc->sessions); 1340 TAILQ_INIT(&softc->targets); 1341 1342 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1343 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1344 UMA_ALIGN_PTR, 0); 1345 1346 return (0); 1347 } 1348 1349 static int 1350 cfiscsi_shutdown(void) 1351 { 1352 struct cfiscsi_softc *softc = &cfiscsi_softc; 1353 1354 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) 1355 return (EBUSY); 1356 1357 uma_zdestroy(cfiscsi_data_wait_zone); 1358 #ifdef ICL_KERNEL_PROXY 1359 cv_destroy(&softc->accept_cv); 1360 #endif 1361 cv_destroy(&softc->sessions_cv); 1362 mtx_destroy(&softc->lock); 1363 return (0); 1364 } 1365 1366 #ifdef ICL_KERNEL_PROXY 1367 static void 1368 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1369 { 1370 struct cfiscsi_session *cs; 1371 1372 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1373 if (cs == NULL) { 1374 CFISCSI_WARN("failed to create session"); 1375 return; 1376 } 1377 1378 icl_conn_handoff_sock(cs->cs_conn, so); 1379 cs->cs_initiator_sa = sa; 1380 cs->cs_portal_id = portal_id; 1381 cs->cs_waiting_for_ctld = true; 1382 cv_signal(&cfiscsi_softc.accept_cv); 1383 } 1384 #endif 1385 1386 static void 1387 cfiscsi_online(void *arg) 1388 { 1389 struct cfiscsi_softc *softc; 1390 struct cfiscsi_target *ct; 1391 int online; 1392 1393 ct = (struct cfiscsi_target *)arg; 1394 softc = ct->ct_softc; 1395 1396 mtx_lock(&softc->lock); 1397 if (ct->ct_online) { 1398 mtx_unlock(&softc->lock); 1399 return; 1400 } 1401 ct->ct_online = 1; 1402 online = softc->online++; 1403 mtx_unlock(&softc->lock); 1404 if (online > 0) 1405 return; 1406 1407 #ifdef ICL_KERNEL_PROXY 1408 if (softc->listener != NULL) 1409 icl_listen_free(softc->listener); 1410 softc->listener = icl_listen_new(cfiscsi_accept); 1411 #endif 1412 } 1413 1414 static void 1415 cfiscsi_offline(void *arg) 1416 { 1417 struct cfiscsi_softc *softc; 1418 struct cfiscsi_target *ct; 1419 struct cfiscsi_session *cs; 1420 int online; 1421 1422 ct = (struct cfiscsi_target *)arg; 1423 softc = ct->ct_softc; 1424 1425 mtx_lock(&softc->lock); 1426 if (!ct->ct_online) { 1427 mtx_unlock(&softc->lock); 1428 return; 1429 } 1430 ct->ct_online = 0; 1431 online = --softc->online; 1432 1433 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1434 if (cs->cs_target == ct) 1435 cfiscsi_session_terminate(cs); 1436 } 1437 do { 1438 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1439 if (cs->cs_target == ct) 1440 break; 1441 } 1442 if (cs != NULL) 1443 cv_wait(&softc->sessions_cv, &softc->lock); 1444 } while (cs != NULL && ct->ct_online == 0); 1445 mtx_unlock(&softc->lock); 1446 if (online > 0) 1447 return; 1448 1449 #ifdef ICL_KERNEL_PROXY 1450 icl_listen_free(softc->listener); 1451 softc->listener = NULL; 1452 #endif 1453 } 1454 1455 static int 1456 cfiscsi_info(void *arg, struct sbuf *sb) 1457 { 1458 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1459 int retval; 1460 1461 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1462 ct->ct_state); 1463 return (retval); 1464 } 1465 1466 static void 1467 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1468 { 1469 struct cfiscsi_softc *softc; 1470 struct cfiscsi_session *cs, *cs2; 1471 struct cfiscsi_target *ct; 1472 struct ctl_iscsi_handoff_params *cihp; 1473 int error; 1474 1475 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1476 softc = &cfiscsi_softc; 1477 1478 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1479 cihp->initiator_name, cihp->initiator_addr, 1480 cihp->target_name); 1481 1482 ct = cfiscsi_target_find(softc, cihp->target_name, 1483 cihp->portal_group_tag); 1484 if (ct == NULL) { 1485 ci->status = CTL_ISCSI_ERROR; 1486 snprintf(ci->error_str, sizeof(ci->error_str), 1487 "%s: target not found", __func__); 1488 return; 1489 } 1490 1491 #ifdef ICL_KERNEL_PROXY 1492 if (cihp->socket > 0 && cihp->connection_id > 0) { 1493 snprintf(ci->error_str, sizeof(ci->error_str), 1494 "both socket and connection_id set"); 1495 ci->status = CTL_ISCSI_ERROR; 1496 cfiscsi_target_release(ct); 1497 return; 1498 } 1499 if (cihp->socket == 0) { 1500 mtx_lock(&cfiscsi_softc.lock); 1501 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1502 if (cs->cs_id == cihp->connection_id) 1503 break; 1504 } 1505 if (cs == NULL) { 1506 mtx_unlock(&cfiscsi_softc.lock); 1507 snprintf(ci->error_str, sizeof(ci->error_str), 1508 "connection not found"); 1509 ci->status = CTL_ISCSI_ERROR; 1510 cfiscsi_target_release(ct); 1511 return; 1512 } 1513 mtx_unlock(&cfiscsi_softc.lock); 1514 } else { 1515 #endif 1516 cs = cfiscsi_session_new(softc, cihp->offload); 1517 if (cs == NULL) { 1518 ci->status = CTL_ISCSI_ERROR; 1519 snprintf(ci->error_str, sizeof(ci->error_str), 1520 "%s: cfiscsi_session_new failed", __func__); 1521 cfiscsi_target_release(ct); 1522 return; 1523 } 1524 #ifdef ICL_KERNEL_PROXY 1525 } 1526 #endif 1527 1528 /* 1529 * First PDU of Full Feature phase has the same CmdSN as the last 1530 * PDU from the Login Phase received from the initiator. Thus, 1531 * the -1 below. 1532 */ 1533 cs->cs_cmdsn = cihp->cmdsn; 1534 cs->cs_statsn = cihp->statsn; 1535 cs->cs_max_recv_data_segment_length = cihp->max_recv_data_segment_length; 1536 cs->cs_max_send_data_segment_length = cihp->max_send_data_segment_length; 1537 cs->cs_max_burst_length = cihp->max_burst_length; 1538 cs->cs_first_burst_length = cihp->first_burst_length; 1539 cs->cs_immediate_data = !!cihp->immediate_data; 1540 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1541 cs->cs_conn->ic_header_crc32c = true; 1542 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1543 cs->cs_conn->ic_data_crc32c = true; 1544 1545 strlcpy(cs->cs_initiator_name, 1546 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1547 strlcpy(cs->cs_initiator_addr, 1548 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1549 strlcpy(cs->cs_initiator_alias, 1550 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1551 memcpy(cs->cs_initiator_isid, 1552 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1553 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1554 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1555 cihp->initiator_isid[0], cihp->initiator_isid[1], 1556 cihp->initiator_isid[2], cihp->initiator_isid[3], 1557 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1558 1559 mtx_lock(&softc->lock); 1560 if (ct->ct_online == 0) { 1561 mtx_unlock(&softc->lock); 1562 cfiscsi_session_terminate(cs); 1563 cfiscsi_target_release(ct); 1564 ci->status = CTL_ISCSI_ERROR; 1565 snprintf(ci->error_str, sizeof(ci->error_str), 1566 "%s: port offline", __func__); 1567 return; 1568 } 1569 cs->cs_target = ct; 1570 mtx_unlock(&softc->lock); 1571 1572 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1573 restart: 1574 if (!cs->cs_terminating) { 1575 mtx_lock(&softc->lock); 1576 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1577 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1578 cs->cs_target == cs2->cs_target && 1579 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1580 if (strcmp(cs->cs_initiator_addr, 1581 cs2->cs_initiator_addr) != 0) { 1582 CFISCSI_SESSION_WARN(cs2, 1583 "session reinstatement from " 1584 "different address %s", 1585 cs->cs_initiator_addr); 1586 } else { 1587 CFISCSI_SESSION_DEBUG(cs2, 1588 "session reinstatement"); 1589 } 1590 cfiscsi_session_terminate(cs2); 1591 mtx_unlock(&softc->lock); 1592 pause("cfiscsi_reinstate", 1); 1593 goto restart; 1594 } 1595 } 1596 mtx_unlock(&softc->lock); 1597 } 1598 1599 /* 1600 * Register initiator with CTL. 1601 */ 1602 cfiscsi_session_register_initiator(cs); 1603 1604 #ifdef ICL_KERNEL_PROXY 1605 if (cihp->socket > 0) { 1606 #endif 1607 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1608 if (error != 0) { 1609 cfiscsi_session_terminate(cs); 1610 refcount_release(&cs->cs_outstanding_ctl_pdus); 1611 ci->status = CTL_ISCSI_ERROR; 1612 snprintf(ci->error_str, sizeof(ci->error_str), 1613 "%s: icl_conn_handoff failed with error %d", 1614 __func__, error); 1615 return; 1616 } 1617 #ifdef ICL_KERNEL_PROXY 1618 } 1619 #endif 1620 1621 #ifdef ICL_KERNEL_PROXY 1622 cs->cs_login_phase = false; 1623 1624 /* 1625 * First PDU of the Full Feature phase has likely already arrived. 1626 * We have to pick it up and execute properly. 1627 */ 1628 if (cs->cs_login_pdu != NULL) { 1629 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1630 cfiscsi_pdu_handle(cs->cs_login_pdu); 1631 cs->cs_login_pdu = NULL; 1632 } 1633 #endif 1634 1635 refcount_release(&cs->cs_outstanding_ctl_pdus); 1636 ci->status = CTL_ISCSI_OK; 1637 } 1638 1639 static void 1640 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1641 { 1642 struct ctl_iscsi_list_params *cilp; 1643 struct cfiscsi_session *cs; 1644 struct cfiscsi_softc *softc; 1645 struct sbuf *sb; 1646 int error; 1647 1648 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1649 softc = &cfiscsi_softc; 1650 1651 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1652 if (sb == NULL) { 1653 ci->status = CTL_ISCSI_ERROR; 1654 snprintf(ci->error_str, sizeof(ci->error_str), 1655 "Unable to allocate %d bytes for iSCSI session list", 1656 cilp->alloc_len); 1657 return; 1658 } 1659 1660 sbuf_printf(sb, "<ctlislist>\n"); 1661 mtx_lock(&softc->lock); 1662 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1663 #ifdef ICL_KERNEL_PROXY 1664 if (cs->cs_target == NULL) 1665 continue; 1666 #endif 1667 error = sbuf_printf(sb, "<connection id=\"%d\">" 1668 "<initiator>%s</initiator>" 1669 "<initiator_addr>%s</initiator_addr>" 1670 "<initiator_alias>%s</initiator_alias>" 1671 "<target>%s</target>" 1672 "<target_alias>%s</target_alias>" 1673 "<target_portal_group_tag>%u</target_portal_group_tag>" 1674 "<header_digest>%s</header_digest>" 1675 "<data_digest>%s</data_digest>" 1676 "<max_recv_data_segment_length>%d</max_recv_data_segment_length>" 1677 "<max_send_data_segment_length>%d</max_send_data_segment_length>" 1678 "<max_burst_length>%d</max_burst_length>" 1679 "<first_burst_length>%d</first_burst_length>" 1680 "<immediate_data>%d</immediate_data>" 1681 "<iser>%d</iser>" 1682 "<offload>%s</offload>" 1683 "</connection>\n", 1684 cs->cs_id, 1685 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1686 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1687 cs->cs_target->ct_tag, 1688 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1689 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1690 cs->cs_max_recv_data_segment_length, 1691 cs->cs_max_send_data_segment_length, 1692 cs->cs_max_burst_length, 1693 cs->cs_first_burst_length, 1694 cs->cs_immediate_data, 1695 cs->cs_conn->ic_iser, 1696 cs->cs_conn->ic_offload); 1697 if (error != 0) 1698 break; 1699 } 1700 mtx_unlock(&softc->lock); 1701 error = sbuf_printf(sb, "</ctlislist>\n"); 1702 if (error != 0) { 1703 sbuf_delete(sb); 1704 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1705 snprintf(ci->error_str, sizeof(ci->error_str), 1706 "Out of space, %d bytes is too small", cilp->alloc_len); 1707 return; 1708 } 1709 sbuf_finish(sb); 1710 1711 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1712 cilp->fill_len = sbuf_len(sb) + 1; 1713 ci->status = CTL_ISCSI_OK; 1714 sbuf_delete(sb); 1715 } 1716 1717 static void 1718 cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1719 { 1720 struct icl_pdu *response; 1721 struct iscsi_bhs_asynchronous_message *bhsam; 1722 struct ctl_iscsi_logout_params *cilp; 1723 struct cfiscsi_session *cs; 1724 struct cfiscsi_softc *softc; 1725 int found = 0; 1726 1727 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1728 softc = &cfiscsi_softc; 1729 1730 mtx_lock(&softc->lock); 1731 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1732 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1733 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1734 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1735 continue; 1736 1737 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1738 if (response == NULL) { 1739 ci->status = CTL_ISCSI_ERROR; 1740 snprintf(ci->error_str, sizeof(ci->error_str), 1741 "Unable to allocate memory"); 1742 mtx_unlock(&softc->lock); 1743 return; 1744 } 1745 bhsam = 1746 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1747 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1748 bhsam->bhsam_flags = 0x80; 1749 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1750 bhsam->bhsam_parameter3 = htons(10); 1751 cfiscsi_pdu_queue(response); 1752 found++; 1753 } 1754 mtx_unlock(&softc->lock); 1755 1756 if (found == 0) { 1757 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1758 snprintf(ci->error_str, sizeof(ci->error_str), 1759 "No matching connections found"); 1760 return; 1761 } 1762 1763 ci->status = CTL_ISCSI_OK; 1764 } 1765 1766 static void 1767 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1768 { 1769 struct icl_pdu *response; 1770 struct iscsi_bhs_asynchronous_message *bhsam; 1771 struct ctl_iscsi_terminate_params *citp; 1772 struct cfiscsi_session *cs; 1773 struct cfiscsi_softc *softc; 1774 int found = 0; 1775 1776 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1777 softc = &cfiscsi_softc; 1778 1779 mtx_lock(&softc->lock); 1780 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1781 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1782 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1783 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1784 continue; 1785 1786 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1787 if (response == NULL) { 1788 /* 1789 * Oh well. Just terminate the connection. 1790 */ 1791 } else { 1792 bhsam = (struct iscsi_bhs_asynchronous_message *) 1793 response->ip_bhs; 1794 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1795 bhsam->bhsam_flags = 0x80; 1796 bhsam->bhsam_0xffffffff = 0xffffffff; 1797 bhsam->bhsam_async_event = 1798 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1799 cfiscsi_pdu_queue(response); 1800 } 1801 cfiscsi_session_terminate(cs); 1802 found++; 1803 } 1804 mtx_unlock(&softc->lock); 1805 1806 if (found == 0) { 1807 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1808 snprintf(ci->error_str, sizeof(ci->error_str), 1809 "No matching connections found"); 1810 return; 1811 } 1812 1813 ci->status = CTL_ISCSI_OK; 1814 } 1815 1816 static void 1817 cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1818 { 1819 struct ctl_iscsi_limits_params *cilp; 1820 struct icl_drv_limits idl; 1821 int error; 1822 1823 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1824 1825 error = icl_limits(cilp->offload, false, &idl); 1826 if (error != 0) { 1827 ci->status = CTL_ISCSI_ERROR; 1828 snprintf(ci->error_str, sizeof(ci->error_str), 1829 "%s: icl_limits failed with error %d", 1830 __func__, error); 1831 return; 1832 } 1833 1834 cilp->max_recv_data_segment_length = 1835 idl.idl_max_recv_data_segment_length; 1836 cilp->max_send_data_segment_length = 1837 idl.idl_max_send_data_segment_length; 1838 cilp->max_burst_length = idl.idl_max_burst_length; 1839 cilp->first_burst_length = idl.idl_first_burst_length; 1840 1841 ci->status = CTL_ISCSI_OK; 1842 } 1843 1844 #ifdef ICL_KERNEL_PROXY 1845 static void 1846 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1847 { 1848 struct ctl_iscsi_listen_params *cilp; 1849 struct sockaddr *sa; 1850 int error; 1851 1852 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1853 1854 if (cfiscsi_softc.listener == NULL) { 1855 CFISCSI_DEBUG("no listener"); 1856 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1857 ci->status = CTL_ISCSI_ERROR; 1858 return; 1859 } 1860 1861 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1862 if (error != 0) { 1863 CFISCSI_DEBUG("getsockaddr, error %d", error); 1864 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1865 ci->status = CTL_ISCSI_ERROR; 1866 return; 1867 } 1868 1869 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1870 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1871 if (error != 0) { 1872 free(sa, M_SONAME); 1873 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1874 snprintf(ci->error_str, sizeof(ci->error_str), 1875 "icl_listen_add failed, error %d", error); 1876 ci->status = CTL_ISCSI_ERROR; 1877 return; 1878 } 1879 1880 ci->status = CTL_ISCSI_OK; 1881 } 1882 1883 static void 1884 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1885 { 1886 struct ctl_iscsi_accept_params *ciap; 1887 struct cfiscsi_session *cs; 1888 int error; 1889 1890 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1891 1892 mtx_lock(&cfiscsi_softc.lock); 1893 for (;;) { 1894 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1895 if (cs->cs_waiting_for_ctld) 1896 break; 1897 } 1898 if (cs != NULL) 1899 break; 1900 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1901 if (error != 0) { 1902 mtx_unlock(&cfiscsi_softc.lock); 1903 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1904 ci->status = CTL_ISCSI_ERROR; 1905 return; 1906 } 1907 } 1908 mtx_unlock(&cfiscsi_softc.lock); 1909 1910 cs->cs_waiting_for_ctld = false; 1911 cs->cs_login_phase = true; 1912 1913 ciap->connection_id = cs->cs_id; 1914 ciap->portal_id = cs->cs_portal_id; 1915 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1916 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1917 cs->cs_initiator_sa->sa_len); 1918 if (error != 0) { 1919 snprintf(ci->error_str, sizeof(ci->error_str), 1920 "copyout failed with error %d", error); 1921 ci->status = CTL_ISCSI_ERROR; 1922 return; 1923 } 1924 1925 ci->status = CTL_ISCSI_OK; 1926 } 1927 1928 static void 1929 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1930 { 1931 struct ctl_iscsi_send_params *cisp; 1932 struct cfiscsi_session *cs; 1933 struct icl_pdu *ip; 1934 size_t datalen; 1935 void *data; 1936 int error; 1937 1938 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1939 1940 mtx_lock(&cfiscsi_softc.lock); 1941 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1942 if (cs->cs_id == cisp->connection_id) 1943 break; 1944 } 1945 if (cs == NULL) { 1946 mtx_unlock(&cfiscsi_softc.lock); 1947 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1948 ci->status = CTL_ISCSI_ERROR; 1949 return; 1950 } 1951 mtx_unlock(&cfiscsi_softc.lock); 1952 1953 #if 0 1954 if (cs->cs_login_phase == false) 1955 return (EBUSY); 1956 #endif 1957 1958 if (cs->cs_terminating) { 1959 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1960 ci->status = CTL_ISCSI_ERROR; 1961 return; 1962 } 1963 1964 datalen = cisp->data_segment_len; 1965 /* 1966 * XXX 1967 */ 1968 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1969 if (datalen > 65535) { 1970 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1971 ci->status = CTL_ISCSI_ERROR; 1972 return; 1973 } 1974 if (datalen > 0) { 1975 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1976 error = copyin(cisp->data_segment, data, datalen); 1977 if (error != 0) { 1978 free(data, M_CFISCSI); 1979 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1980 ci->status = CTL_ISCSI_ERROR; 1981 return; 1982 } 1983 } 1984 1985 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1986 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1987 if (datalen > 0) { 1988 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1989 free(data, M_CFISCSI); 1990 } 1991 CFISCSI_SESSION_LOCK(cs); 1992 icl_pdu_queue(ip); 1993 CFISCSI_SESSION_UNLOCK(cs); 1994 ci->status = CTL_ISCSI_OK; 1995 } 1996 1997 static void 1998 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1999 { 2000 struct ctl_iscsi_receive_params *cirp; 2001 struct cfiscsi_session *cs; 2002 struct icl_pdu *ip; 2003 void *data; 2004 int error; 2005 2006 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2007 2008 mtx_lock(&cfiscsi_softc.lock); 2009 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2010 if (cs->cs_id == cirp->connection_id) 2011 break; 2012 } 2013 if (cs == NULL) { 2014 mtx_unlock(&cfiscsi_softc.lock); 2015 snprintf(ci->error_str, sizeof(ci->error_str), 2016 "connection not found"); 2017 ci->status = CTL_ISCSI_ERROR; 2018 return; 2019 } 2020 mtx_unlock(&cfiscsi_softc.lock); 2021 2022 #if 0 2023 if (is->is_login_phase == false) 2024 return (EBUSY); 2025 #endif 2026 2027 CFISCSI_SESSION_LOCK(cs); 2028 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2029 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2030 if (error != 0) { 2031 CFISCSI_SESSION_UNLOCK(cs); 2032 snprintf(ci->error_str, sizeof(ci->error_str), 2033 "interrupted by signal"); 2034 ci->status = CTL_ISCSI_ERROR; 2035 return; 2036 } 2037 } 2038 2039 if (cs->cs_terminating) { 2040 CFISCSI_SESSION_UNLOCK(cs); 2041 snprintf(ci->error_str, sizeof(ci->error_str), 2042 "connection terminating"); 2043 ci->status = CTL_ISCSI_ERROR; 2044 return; 2045 } 2046 ip = cs->cs_login_pdu; 2047 cs->cs_login_pdu = NULL; 2048 CFISCSI_SESSION_UNLOCK(cs); 2049 2050 if (ip->ip_data_len > cirp->data_segment_len) { 2051 icl_pdu_free(ip); 2052 snprintf(ci->error_str, sizeof(ci->error_str), 2053 "data segment too big"); 2054 ci->status = CTL_ISCSI_ERROR; 2055 return; 2056 } 2057 2058 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2059 if (ip->ip_data_len > 0) { 2060 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2061 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2062 copyout(data, cirp->data_segment, ip->ip_data_len); 2063 free(data, M_CFISCSI); 2064 } 2065 2066 icl_pdu_free(ip); 2067 ci->status = CTL_ISCSI_OK; 2068 } 2069 2070 #endif /* !ICL_KERNEL_PROXY */ 2071 2072 static void 2073 cfiscsi_ioctl_port_create(struct ctl_req *req) 2074 { 2075 struct cfiscsi_target *ct; 2076 struct ctl_port *port; 2077 const char *target, *alias, *tags; 2078 struct scsi_vpd_id_descriptor *desc; 2079 ctl_options_t opts; 2080 int retval, len, idlen; 2081 uint16_t tag; 2082 2083 ctl_init_opts(&opts, req->num_args, req->kern_args); 2084 target = ctl_get_opt(&opts, "cfiscsi_target"); 2085 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2086 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2087 if (target == NULL || tags == NULL) { 2088 req->status = CTL_LUN_ERROR; 2089 snprintf(req->error_str, sizeof(req->error_str), 2090 "Missing required argument"); 2091 ctl_free_opts(&opts); 2092 return; 2093 } 2094 tag = strtol(tags, (char **)NULL, 10); 2095 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2096 if (ct == NULL) { 2097 req->status = CTL_LUN_ERROR; 2098 snprintf(req->error_str, sizeof(req->error_str), 2099 "failed to create target \"%s\"", target); 2100 ctl_free_opts(&opts); 2101 return; 2102 } 2103 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2104 req->status = CTL_LUN_ERROR; 2105 snprintf(req->error_str, sizeof(req->error_str), 2106 "target \"%s\" for portal group tag %u already exists", 2107 target, tag); 2108 cfiscsi_target_release(ct); 2109 ctl_free_opts(&opts); 2110 return; 2111 } 2112 port = &ct->ct_port; 2113 // WAT 2114 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2115 goto done; 2116 2117 port->frontend = &cfiscsi_frontend; 2118 port->port_type = CTL_PORT_ISCSI; 2119 /* XXX KDM what should the real number be here? */ 2120 port->num_requested_ctl_io = 4096; 2121 port->port_name = "iscsi"; 2122 port->physical_port = tag; 2123 port->virtual_port = ct->ct_target_id; 2124 port->port_online = cfiscsi_online; 2125 port->port_offline = cfiscsi_offline; 2126 port->port_info = cfiscsi_info; 2127 port->onoff_arg = ct; 2128 port->fe_datamove = cfiscsi_datamove; 2129 port->fe_done = cfiscsi_done; 2130 port->targ_port = -1; 2131 2132 port->options = opts; 2133 STAILQ_INIT(&opts); 2134 2135 /* Generate Port ID. */ 2136 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2137 idlen = roundup2(idlen, 4); 2138 len = sizeof(struct scsi_vpd_device_id) + idlen; 2139 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2140 M_CTL, M_WAITOK | M_ZERO); 2141 port->port_devid->len = len; 2142 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2143 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2144 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2145 SVPD_ID_TYPE_SCSI_NAME; 2146 desc->length = idlen; 2147 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2148 2149 /* Generate Target ID. */ 2150 idlen = strlen(target) + 1; 2151 idlen = roundup2(idlen, 4); 2152 len = sizeof(struct scsi_vpd_device_id) + idlen; 2153 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2154 M_CTL, M_WAITOK | M_ZERO); 2155 port->target_devid->len = len; 2156 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2157 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2158 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2159 SVPD_ID_TYPE_SCSI_NAME; 2160 desc->length = idlen; 2161 strlcpy(desc->identifier, target, idlen); 2162 2163 retval = ctl_port_register(port); 2164 if (retval != 0) { 2165 ctl_free_opts(&port->options); 2166 cfiscsi_target_release(ct); 2167 free(port->port_devid, M_CFISCSI); 2168 free(port->target_devid, M_CFISCSI); 2169 req->status = CTL_LUN_ERROR; 2170 snprintf(req->error_str, sizeof(req->error_str), 2171 "ctl_port_register() failed with error %d", retval); 2172 return; 2173 } 2174 done: 2175 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2176 req->status = CTL_LUN_OK; 2177 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2178 sizeof(port->targ_port)); //XXX 2179 } 2180 2181 static void 2182 cfiscsi_ioctl_port_remove(struct ctl_req *req) 2183 { 2184 struct cfiscsi_target *ct; 2185 const char *target, *tags; 2186 ctl_options_t opts; 2187 uint16_t tag; 2188 2189 ctl_init_opts(&opts, req->num_args, req->kern_args); 2190 target = ctl_get_opt(&opts, "cfiscsi_target"); 2191 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2192 if (target == NULL || tags == NULL) { 2193 ctl_free_opts(&opts); 2194 req->status = CTL_LUN_ERROR; 2195 snprintf(req->error_str, sizeof(req->error_str), 2196 "Missing required argument"); 2197 return; 2198 } 2199 tag = strtol(tags, (char **)NULL, 10); 2200 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2201 if (ct == NULL) { 2202 ctl_free_opts(&opts); 2203 req->status = CTL_LUN_ERROR; 2204 snprintf(req->error_str, sizeof(req->error_str), 2205 "can't find target \"%s\"", target); 2206 return; 2207 } 2208 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2209 ctl_free_opts(&opts); 2210 req->status = CTL_LUN_ERROR; 2211 snprintf(req->error_str, sizeof(req->error_str), 2212 "target \"%s\" is already dying", target); 2213 return; 2214 } 2215 ctl_free_opts(&opts); 2216 2217 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2218 ctl_port_offline(&ct->ct_port); 2219 cfiscsi_target_release(ct); 2220 cfiscsi_target_release(ct); 2221 req->status = CTL_LUN_OK; 2222 } 2223 2224 static int 2225 cfiscsi_ioctl(struct cdev *dev, 2226 u_long cmd, caddr_t addr, int flag, struct thread *td) 2227 { 2228 struct ctl_iscsi *ci; 2229 struct ctl_req *req; 2230 2231 if (cmd == CTL_PORT_REQ) { 2232 req = (struct ctl_req *)addr; 2233 switch (req->reqtype) { 2234 case CTL_REQ_CREATE: 2235 cfiscsi_ioctl_port_create(req); 2236 break; 2237 case CTL_REQ_REMOVE: 2238 cfiscsi_ioctl_port_remove(req); 2239 break; 2240 default: 2241 req->status = CTL_LUN_ERROR; 2242 snprintf(req->error_str, sizeof(req->error_str), 2243 "Unsupported request type %d", req->reqtype); 2244 } 2245 return (0); 2246 } 2247 2248 if (cmd != CTL_ISCSI) 2249 return (ENOTTY); 2250 2251 ci = (struct ctl_iscsi *)addr; 2252 switch (ci->type) { 2253 case CTL_ISCSI_HANDOFF: 2254 cfiscsi_ioctl_handoff(ci); 2255 break; 2256 case CTL_ISCSI_LIST: 2257 cfiscsi_ioctl_list(ci); 2258 break; 2259 case CTL_ISCSI_LOGOUT: 2260 cfiscsi_ioctl_logout(ci); 2261 break; 2262 case CTL_ISCSI_TERMINATE: 2263 cfiscsi_ioctl_terminate(ci); 2264 break; 2265 case CTL_ISCSI_LIMITS: 2266 cfiscsi_ioctl_limits(ci); 2267 break; 2268 #ifdef ICL_KERNEL_PROXY 2269 case CTL_ISCSI_LISTEN: 2270 cfiscsi_ioctl_listen(ci); 2271 break; 2272 case CTL_ISCSI_ACCEPT: 2273 cfiscsi_ioctl_accept(ci); 2274 break; 2275 case CTL_ISCSI_SEND: 2276 cfiscsi_ioctl_send(ci); 2277 break; 2278 case CTL_ISCSI_RECEIVE: 2279 cfiscsi_ioctl_receive(ci); 2280 break; 2281 #else 2282 case CTL_ISCSI_LISTEN: 2283 case CTL_ISCSI_ACCEPT: 2284 case CTL_ISCSI_SEND: 2285 case CTL_ISCSI_RECEIVE: 2286 ci->status = CTL_ISCSI_ERROR; 2287 snprintf(ci->error_str, sizeof(ci->error_str), 2288 "%s: CTL compiled without ICL_KERNEL_PROXY", 2289 __func__); 2290 break; 2291 #endif /* !ICL_KERNEL_PROXY */ 2292 default: 2293 ci->status = CTL_ISCSI_ERROR; 2294 snprintf(ci->error_str, sizeof(ci->error_str), 2295 "%s: invalid iSCSI request type %d", __func__, ci->type); 2296 break; 2297 } 2298 2299 return (0); 2300 } 2301 2302 static void 2303 cfiscsi_target_hold(struct cfiscsi_target *ct) 2304 { 2305 2306 refcount_acquire(&ct->ct_refcount); 2307 } 2308 2309 static void 2310 cfiscsi_target_release(struct cfiscsi_target *ct) 2311 { 2312 struct cfiscsi_softc *softc; 2313 2314 softc = ct->ct_softc; 2315 mtx_lock(&softc->lock); 2316 if (refcount_release(&ct->ct_refcount)) { 2317 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2318 mtx_unlock(&softc->lock); 2319 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2320 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2321 if (ctl_port_deregister(&ct->ct_port) != 0) 2322 printf("%s: ctl_port_deregister() failed\n", 2323 __func__); 2324 } 2325 free(ct, M_CFISCSI); 2326 2327 return; 2328 } 2329 mtx_unlock(&softc->lock); 2330 } 2331 2332 static struct cfiscsi_target * 2333 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2334 { 2335 struct cfiscsi_target *ct; 2336 2337 mtx_lock(&softc->lock); 2338 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2339 if (ct->ct_tag != tag || 2340 strcmp(name, ct->ct_name) != 0 || 2341 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2342 continue; 2343 cfiscsi_target_hold(ct); 2344 mtx_unlock(&softc->lock); 2345 return (ct); 2346 } 2347 mtx_unlock(&softc->lock); 2348 2349 return (NULL); 2350 } 2351 2352 static struct cfiscsi_target * 2353 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2354 const char *alias, uint16_t tag) 2355 { 2356 struct cfiscsi_target *ct, *newct; 2357 2358 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2359 return (NULL); 2360 2361 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2362 2363 mtx_lock(&softc->lock); 2364 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2365 if (ct->ct_tag != tag || 2366 strcmp(name, ct->ct_name) != 0 || 2367 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2368 continue; 2369 cfiscsi_target_hold(ct); 2370 mtx_unlock(&softc->lock); 2371 free(newct, M_CFISCSI); 2372 return (ct); 2373 } 2374 2375 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2376 if (alias != NULL) 2377 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2378 newct->ct_tag = tag; 2379 refcount_init(&newct->ct_refcount, 1); 2380 newct->ct_softc = softc; 2381 if (TAILQ_EMPTY(&softc->targets)) 2382 softc->last_target_id = 0; 2383 newct->ct_target_id = ++softc->last_target_id; 2384 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2385 mtx_unlock(&softc->lock); 2386 2387 return (newct); 2388 } 2389 2390 static void 2391 cfiscsi_datamove_in(union ctl_io *io) 2392 { 2393 struct cfiscsi_session *cs; 2394 struct icl_pdu *request, *response; 2395 const struct iscsi_bhs_scsi_command *bhssc; 2396 struct iscsi_bhs_data_in *bhsdi; 2397 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2398 size_t len, expected_len, sg_len, buffer_offset; 2399 const char *sg_addr; 2400 int ctl_sg_count, error, i; 2401 2402 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2403 cs = PDU_SESSION(request); 2404 2405 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2406 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2407 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2408 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2409 2410 if (io->scsiio.kern_sg_entries > 0) { 2411 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2412 ctl_sg_count = io->scsiio.kern_sg_entries; 2413 } else { 2414 ctl_sglist = &ctl_sg_entry; 2415 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2416 ctl_sglist->len = io->scsiio.kern_data_len; 2417 ctl_sg_count = 1; 2418 } 2419 2420 /* 2421 * This is the total amount of data to be transferred within the current 2422 * SCSI command. We need to record it so that we can properly report 2423 * underflow/underflow. 2424 */ 2425 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2426 2427 /* 2428 * This is the offset within the current SCSI command; for the first 2429 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2430 * it will be the sum of lengths of previous ones. 2431 */ 2432 buffer_offset = io->scsiio.kern_rel_offset; 2433 2434 /* 2435 * This is the transfer length expected by the initiator. In theory, 2436 * it could be different from the correct amount of data from the SCSI 2437 * point of view, even if that doesn't make any sense. 2438 */ 2439 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2440 #if 0 2441 if (expected_len != io->scsiio.kern_total_len) { 2442 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2443 "actual length %zd", expected_len, 2444 (size_t)io->scsiio.kern_total_len); 2445 } 2446 #endif 2447 2448 if (buffer_offset >= expected_len) { 2449 #if 0 2450 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2451 "already sent the expected len", buffer_offset); 2452 #endif 2453 io->scsiio.be_move_done(io); 2454 return; 2455 } 2456 2457 i = 0; 2458 sg_addr = NULL; 2459 sg_len = 0; 2460 response = NULL; 2461 bhsdi = NULL; 2462 for (;;) { 2463 if (response == NULL) { 2464 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2465 if (response == NULL) { 2466 CFISCSI_SESSION_WARN(cs, "failed to " 2467 "allocate memory; dropping connection"); 2468 ctl_set_busy(&io->scsiio); 2469 io->scsiio.be_move_done(io); 2470 cfiscsi_session_terminate(cs); 2471 return; 2472 } 2473 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2474 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2475 bhsdi->bhsdi_initiator_task_tag = 2476 bhssc->bhssc_initiator_task_tag; 2477 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2478 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2479 PDU_EXPDATASN(request)++; 2480 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2481 } 2482 2483 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2484 if (sg_len == 0) { 2485 sg_addr = ctl_sglist[i].addr; 2486 sg_len = ctl_sglist[i].len; 2487 KASSERT(sg_len > 0, ("sg_len <= 0")); 2488 } 2489 2490 len = sg_len; 2491 2492 /* 2493 * Truncate to maximum data segment length. 2494 */ 2495 KASSERT(response->ip_data_len < cs->cs_max_send_data_segment_length, 2496 ("ip_data_len %zd >= max_send_data_segment_length %d", 2497 response->ip_data_len, cs->cs_max_send_data_segment_length)); 2498 if (response->ip_data_len + len > 2499 cs->cs_max_send_data_segment_length) { 2500 len = cs->cs_max_send_data_segment_length - 2501 response->ip_data_len; 2502 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2503 len, sg_len)); 2504 } 2505 2506 /* 2507 * Truncate to expected data transfer length. 2508 */ 2509 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2510 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2511 buffer_offset, response->ip_data_len, expected_len)); 2512 if (buffer_offset + response->ip_data_len + len > expected_len) { 2513 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2514 "to expected data transfer length %zd", 2515 buffer_offset + response->ip_data_len + len, expected_len); 2516 len = expected_len - (buffer_offset + response->ip_data_len); 2517 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2518 len, sg_len)); 2519 } 2520 2521 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2522 if (error != 0) { 2523 CFISCSI_SESSION_WARN(cs, "failed to " 2524 "allocate memory; dropping connection"); 2525 icl_pdu_free(response); 2526 ctl_set_busy(&io->scsiio); 2527 io->scsiio.be_move_done(io); 2528 cfiscsi_session_terminate(cs); 2529 return; 2530 } 2531 sg_addr += len; 2532 sg_len -= len; 2533 io->scsiio.kern_data_resid -= len; 2534 2535 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2536 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2537 buffer_offset, response->ip_data_len, expected_len)); 2538 if (buffer_offset + response->ip_data_len == expected_len) { 2539 /* 2540 * Already have the amount of data the initiator wanted. 2541 */ 2542 break; 2543 } 2544 2545 if (sg_len == 0) { 2546 /* 2547 * End of scatter-gather segment; 2548 * proceed to the next one... 2549 */ 2550 if (i == ctl_sg_count - 1) { 2551 /* 2552 * ... unless this was the last one. 2553 */ 2554 break; 2555 } 2556 i++; 2557 } 2558 2559 if (response->ip_data_len == cs->cs_max_send_data_segment_length) { 2560 /* 2561 * Can't stuff more data into the current PDU; 2562 * queue it. Note that's not enough to check 2563 * for kern_data_resid == 0 instead; there 2564 * may be several Data-In PDUs for the final 2565 * call to cfiscsi_datamove(), and we want 2566 * to set the F flag only on the last of them. 2567 */ 2568 buffer_offset += response->ip_data_len; 2569 if (buffer_offset == io->scsiio.kern_total_len || 2570 buffer_offset == expected_len) { 2571 buffer_offset -= response->ip_data_len; 2572 break; 2573 } 2574 cfiscsi_pdu_queue(response); 2575 response = NULL; 2576 bhsdi = NULL; 2577 } 2578 } 2579 if (response != NULL) { 2580 buffer_offset += response->ip_data_len; 2581 if (buffer_offset == io->scsiio.kern_total_len || 2582 buffer_offset == expected_len) { 2583 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2584 if (io->io_hdr.status == CTL_SUCCESS) { 2585 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2586 if (PDU_TOTAL_TRANSFER_LEN(request) < 2587 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2588 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2589 bhsdi->bhsdi_residual_count = 2590 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2591 PDU_TOTAL_TRANSFER_LEN(request)); 2592 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2593 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2594 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2595 bhsdi->bhsdi_residual_count = 2596 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2597 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2598 } 2599 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2600 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2601 } 2602 } 2603 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2604 cfiscsi_pdu_queue(response); 2605 } 2606 2607 io->scsiio.be_move_done(io); 2608 } 2609 2610 static void 2611 cfiscsi_datamove_out(union ctl_io *io) 2612 { 2613 struct cfiscsi_session *cs; 2614 struct icl_pdu *request, *response; 2615 const struct iscsi_bhs_scsi_command *bhssc; 2616 struct iscsi_bhs_r2t *bhsr2t; 2617 struct cfiscsi_data_wait *cdw; 2618 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2619 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2620 uint32_t target_transfer_tag; 2621 bool done; 2622 2623 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2624 cs = PDU_SESSION(request); 2625 2626 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2627 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2628 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2629 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2630 2631 /* 2632 * We need to record it so that we can properly report 2633 * underflow/underflow. 2634 */ 2635 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2636 2637 /* 2638 * Complete write underflow. Not a single byte to read. Return. 2639 */ 2640 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2641 if (io->scsiio.kern_rel_offset >= expected_len) { 2642 io->scsiio.be_move_done(io); 2643 return; 2644 } 2645 datamove_len = MIN(io->scsiio.kern_data_len, 2646 expected_len - io->scsiio.kern_rel_offset); 2647 2648 target_transfer_tag = 2649 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2650 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2651 &target_transfer_tag); 2652 if (cdw == NULL) { 2653 CFISCSI_SESSION_WARN(cs, "failed to " 2654 "allocate memory; dropping connection"); 2655 ctl_set_busy(&io->scsiio); 2656 io->scsiio.be_move_done(io); 2657 cfiscsi_session_terminate(cs); 2658 return; 2659 } 2660 #if 0 2661 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2662 "task tag 0x%x, target transfer tag 0x%x", 2663 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2664 #endif 2665 2666 cdw->cdw_ctl_io = io; 2667 cdw->cdw_target_transfer_tag = target_transfer_tag; 2668 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2669 cdw->cdw_r2t_end = datamove_len; 2670 cdw->cdw_datasn = 0; 2671 2672 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2673 if (io->scsiio.kern_sg_entries > 0) { 2674 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2675 } else { 2676 ctl_sglist = &ctl_sg_entry; 2677 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2678 ctl_sglist->len = datamove_len; 2679 } 2680 cdw->cdw_sg_index = 0; 2681 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2682 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2683 r2t_off = io->scsiio.ext_data_filled; 2684 while (r2t_off > 0) { 2685 if (r2t_off >= cdw->cdw_sg_len) { 2686 r2t_off -= cdw->cdw_sg_len; 2687 cdw->cdw_sg_index++; 2688 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2689 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2690 continue; 2691 } 2692 cdw->cdw_sg_addr += r2t_off; 2693 cdw->cdw_sg_len -= r2t_off; 2694 r2t_off = 0; 2695 } 2696 2697 if (cs->cs_immediate_data && 2698 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2699 icl_pdu_data_segment_length(request)) { 2700 done = cfiscsi_handle_data_segment(request, cdw); 2701 if (done) { 2702 cfiscsi_data_wait_free(cs, cdw); 2703 io->scsiio.be_move_done(io); 2704 return; 2705 } 2706 } 2707 2708 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2709 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2710 cs->cs_max_burst_length); 2711 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2712 2713 CFISCSI_SESSION_LOCK(cs); 2714 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2715 CFISCSI_SESSION_UNLOCK(cs); 2716 2717 /* 2718 * XXX: We should limit the number of outstanding R2T PDUs 2719 * per task to MaxOutstandingR2T. 2720 */ 2721 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2722 if (response == NULL) { 2723 CFISCSI_SESSION_WARN(cs, "failed to " 2724 "allocate memory; dropping connection"); 2725 ctl_set_busy(&io->scsiio); 2726 io->scsiio.be_move_done(io); 2727 cfiscsi_session_terminate(cs); 2728 return; 2729 } 2730 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2731 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2732 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2733 bhsr2t->bhsr2t_flags = 0x80; 2734 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2735 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2736 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2737 /* 2738 * XXX: Here we assume that cfiscsi_datamove() won't ever 2739 * be running concurrently on several CPUs for a given 2740 * command. 2741 */ 2742 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2743 PDU_R2TSN(request)++; 2744 /* 2745 * This is the offset within the current SCSI command; 2746 * i.e. for the first call of datamove(), it will be 0, 2747 * and for subsequent ones it will be the sum of lengths 2748 * of previous ones. 2749 * 2750 * The ext_data_filled is to account for unsolicited 2751 * (immediate) data that might have already arrived. 2752 */ 2753 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2754 /* 2755 * This is the total length (sum of S/G lengths) this call 2756 * to cfiscsi_datamove() is supposed to handle, limited by 2757 * MaxBurstLength. 2758 */ 2759 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2760 cfiscsi_pdu_queue(response); 2761 } 2762 2763 static void 2764 cfiscsi_datamove(union ctl_io *io) 2765 { 2766 2767 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2768 cfiscsi_datamove_in(io); 2769 else { 2770 /* We hadn't received anything during this datamove yet. */ 2771 io->scsiio.ext_data_filled = 0; 2772 cfiscsi_datamove_out(io); 2773 } 2774 } 2775 2776 static void 2777 cfiscsi_scsi_command_done(union ctl_io *io) 2778 { 2779 struct icl_pdu *request, *response; 2780 struct iscsi_bhs_scsi_command *bhssc; 2781 struct iscsi_bhs_scsi_response *bhssr; 2782 #ifdef DIAGNOSTIC 2783 struct cfiscsi_data_wait *cdw; 2784 #endif 2785 struct cfiscsi_session *cs; 2786 uint16_t sense_length; 2787 2788 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2789 cs = PDU_SESSION(request); 2790 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2791 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2792 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2793 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2794 2795 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2796 // bhssc->bhssc_initiator_task_tag); 2797 2798 #ifdef DIAGNOSTIC 2799 CFISCSI_SESSION_LOCK(cs); 2800 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2801 KASSERT(bhssc->bhssc_initiator_task_tag != 2802 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2803 CFISCSI_SESSION_UNLOCK(cs); 2804 #endif 2805 2806 /* 2807 * Do not return status for aborted commands. 2808 * There are exceptions, but none supported by CTL yet. 2809 */ 2810 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2811 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2812 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2813 ctl_free_io(io); 2814 icl_pdu_free(request); 2815 return; 2816 } 2817 2818 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2819 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2820 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2821 bhssr->bhssr_flags = 0x80; 2822 /* 2823 * XXX: We don't deal with bidirectional under/overflows; 2824 * does anything actually support those? 2825 */ 2826 if (PDU_TOTAL_TRANSFER_LEN(request) < 2827 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2828 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2829 bhssr->bhssr_residual_count = 2830 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2831 PDU_TOTAL_TRANSFER_LEN(request)); 2832 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2833 // ntohl(bhssr->bhssr_residual_count)); 2834 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2835 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2836 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2837 bhssr->bhssr_residual_count = 2838 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2839 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2840 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2841 // ntohl(bhssr->bhssr_residual_count)); 2842 } 2843 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2844 bhssr->bhssr_status = io->scsiio.scsi_status; 2845 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2846 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2847 2848 if (io->scsiio.sense_len > 0) { 2849 #if 0 2850 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2851 io->scsiio.sense_len); 2852 #endif 2853 sense_length = htons(io->scsiio.sense_len); 2854 icl_pdu_append_data(response, 2855 &sense_length, sizeof(sense_length), M_WAITOK); 2856 icl_pdu_append_data(response, 2857 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2858 } 2859 2860 ctl_free_io(io); 2861 icl_pdu_free(request); 2862 cfiscsi_pdu_queue(response); 2863 } 2864 2865 static void 2866 cfiscsi_task_management_done(union ctl_io *io) 2867 { 2868 struct icl_pdu *request, *response; 2869 struct iscsi_bhs_task_management_request *bhstmr; 2870 struct iscsi_bhs_task_management_response *bhstmr2; 2871 struct cfiscsi_data_wait *cdw, *tmpcdw; 2872 struct cfiscsi_session *cs, *tcs; 2873 struct cfiscsi_softc *softc; 2874 int cold_reset = 0; 2875 2876 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2877 cs = PDU_SESSION(request); 2878 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2879 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2880 ISCSI_BHS_OPCODE_TASK_REQUEST, 2881 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2882 2883 #if 0 2884 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2885 bhstmr->bhstmr_initiator_task_tag, 2886 bhstmr->bhstmr_referenced_task_tag); 2887 #endif 2888 2889 if ((bhstmr->bhstmr_function & ~0x80) == 2890 BHSTMR_FUNCTION_ABORT_TASK) { 2891 /* 2892 * Make sure we no longer wait for Data-Out for this command. 2893 */ 2894 CFISCSI_SESSION_LOCK(cs); 2895 TAILQ_FOREACH_SAFE(cdw, 2896 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2897 if (bhstmr->bhstmr_referenced_task_tag != 2898 cdw->cdw_initiator_task_tag) 2899 continue; 2900 2901 #if 0 2902 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2903 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2904 #endif 2905 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2906 cdw, cdw_next); 2907 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2908 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2909 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2910 cfiscsi_data_wait_free(cs, cdw); 2911 } 2912 CFISCSI_SESSION_UNLOCK(cs); 2913 } 2914 if ((bhstmr->bhstmr_function & ~0x80) == 2915 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2916 io->io_hdr.status == CTL_SUCCESS) 2917 cold_reset = 1; 2918 2919 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2920 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2921 response->ip_bhs; 2922 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2923 bhstmr2->bhstmr_flags = 0x80; 2924 switch (io->taskio.task_status) { 2925 case CTL_TASK_FUNCTION_COMPLETE: 2926 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2927 break; 2928 case CTL_TASK_FUNCTION_SUCCEEDED: 2929 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2930 break; 2931 case CTL_TASK_LUN_DOES_NOT_EXIST: 2932 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2933 break; 2934 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2935 default: 2936 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2937 break; 2938 } 2939 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2940 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2941 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2942 2943 ctl_free_io(io); 2944 icl_pdu_free(request); 2945 cfiscsi_pdu_queue(response); 2946 2947 if (cold_reset) { 2948 softc = cs->cs_target->ct_softc; 2949 mtx_lock(&softc->lock); 2950 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2951 if (tcs->cs_target == cs->cs_target) 2952 cfiscsi_session_terminate(tcs); 2953 } 2954 mtx_unlock(&softc->lock); 2955 } 2956 } 2957 2958 static void 2959 cfiscsi_done(union ctl_io *io) 2960 { 2961 struct icl_pdu *request; 2962 struct cfiscsi_session *cs; 2963 2964 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2965 ("invalid CTL status %#x", io->io_hdr.status)); 2966 2967 if (io->io_hdr.io_type == CTL_IO_TASK && 2968 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2969 /* 2970 * Implicit task termination has just completed; nothing to do. 2971 */ 2972 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2973 cs->cs_tasks_aborted = true; 2974 refcount_release(&cs->cs_outstanding_ctl_pdus); 2975 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2976 ctl_free_io(io); 2977 return; 2978 } 2979 2980 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2981 cs = PDU_SESSION(request); 2982 2983 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2984 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2985 cfiscsi_scsi_command_done(io); 2986 break; 2987 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2988 cfiscsi_task_management_done(io); 2989 break; 2990 default: 2991 panic("cfiscsi_done called with wrong opcode 0x%x", 2992 request->ip_bhs->bhs_opcode); 2993 } 2994 2995 refcount_release(&cs->cs_outstanding_ctl_pdus); 2996 } 2997