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