ctl_frontend_iscsi.c revision 325809
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: stable/11/sys/cam/ctl/ctl_frontend_iscsi.c 325809 2017-11-14 16:00:21Z trasz $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: stable/11/sys/cam/ctl/ctl_frontend_iscsi.c 325809 2017-11-14 16:00:21Z trasz $"); 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 81FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 82#endif 83 84static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 85static uma_zone_t cfiscsi_data_wait_zone; 86 87SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 88 "CAM Target Layer iSCSI Frontend"); 89static int debug = 1; 90SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 91 &debug, 1, "Enable debug messages"); 92static int ping_timeout = 5; 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95static int login_timeout = 60; 96SYSCTL_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"); 98static int maxtags = 256; 99SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxtags, CTLFLAG_RWTUN, 100 &maxtags, 0, "Max number of requests queued by initiator"); 101 102#define CFISCSI_DEBUG(X, ...) \ 103 do { \ 104 if (debug > 1) { \ 105 printf("%s: " X "\n", \ 106 __func__, ## __VA_ARGS__); \ 107 } \ 108 } while (0) 109 110#define CFISCSI_WARN(X, ...) \ 111 do { \ 112 if (debug > 0) { \ 113 printf("WARNING: %s: " X "\n", \ 114 __func__, ## __VA_ARGS__); \ 115 } \ 116 } while (0) 117 118#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 119 do { \ 120 if (debug > 1) { \ 121 printf("%s: %s (%s): " X "\n", \ 122 __func__, S->cs_initiator_addr, \ 123 S->cs_initiator_name, ## __VA_ARGS__); \ 124 } \ 125 } while (0) 126 127#define CFISCSI_SESSION_WARN(S, X, ...) \ 128 do { \ 129 if (debug > 0) { \ 130 printf("WARNING: %s (%s): " X "\n", \ 131 S->cs_initiator_addr, \ 132 S->cs_initiator_name, ## __VA_ARGS__); \ 133 } \ 134 } while (0) 135 136#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 137#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 138#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 139 140#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 141#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 142#define PDU_EXPDATASN(X) (X)->ip_prv0 143#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 144#define PDU_R2TSN(X) (X)->ip_prv2 145 146static int cfiscsi_init(void); 147static int cfiscsi_shutdown(void); 148static void cfiscsi_online(void *arg); 149static void cfiscsi_offline(void *arg); 150static int cfiscsi_info(void *arg, struct sbuf *sb); 151static int cfiscsi_ioctl(struct cdev *dev, 152 u_long cmd, caddr_t addr, int flag, struct thread *td); 153static void cfiscsi_datamove(union ctl_io *io); 154static void cfiscsi_datamove_in(union ctl_io *io); 155static void cfiscsi_datamove_out(union ctl_io *io); 156static void cfiscsi_done(union ctl_io *io); 157static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 158static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 159static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 160static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 161static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 162static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 163static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 164static 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); 168static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 169 struct cfiscsi_data_wait *cdw); 170static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 171 *softc, const char *name, uint16_t tag); 172static struct cfiscsi_target *cfiscsi_target_find_or_create( 173 struct cfiscsi_softc *softc, const char *name, const char *alias, 174 uint16_t tag); 175static void cfiscsi_target_release(struct cfiscsi_target *ct); 176static void cfiscsi_session_delete(struct cfiscsi_session *cs); 177 178static struct cfiscsi_softc cfiscsi_softc; 179 180static struct ctl_frontend cfiscsi_frontend = 181{ 182 .name = "iscsi", 183 .init = cfiscsi_init, 184 .ioctl = cfiscsi_ioctl, 185 .shutdown = cfiscsi_shutdown, 186}; 187CTL_FRONTEND_DECLARE(cfiscsi, cfiscsi_frontend); 188MODULE_DEPEND(cfiscsi, icl, 1, 1, 1); 189 190static struct icl_pdu * 191cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 192{ 193 194 return (icl_pdu_new(request->ip_conn, flags)); 195} 196 197static bool 198cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 199{ 200 const struct iscsi_bhs_scsi_command *bhssc; 201 struct cfiscsi_session *cs; 202 uint32_t cmdsn, expstatsn; 203 204 cs = PDU_SESSION(request); 205 206 /* 207 * Every incoming PDU - not just NOP-Out - resets the ping timer. 208 * The purpose of the timeout is to reset the connection when it stalls; 209 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 210 * in some queue. 211 * 212 * XXX: Locking? 213 */ 214 cs->cs_timeout = 0; 215 216 /* 217 * Data-Out PDUs don't contain CmdSN. 218 */ 219 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 220 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 221 return (false); 222 223 /* 224 * We're only using fields common for all the request 225 * (initiator -> target) PDUs. 226 */ 227 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 228 cmdsn = ntohl(bhssc->bhssc_cmdsn); 229 expstatsn = ntohl(bhssc->bhssc_expstatsn); 230 231 CFISCSI_SESSION_LOCK(cs); 232#if 0 233 if (expstatsn != cs->cs_statsn) { 234 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 235 "while current StatSN is %d", expstatsn, 236 cs->cs_statsn); 237 } 238#endif 239 240 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 241 /* 242 * The target MUST silently ignore any non-immediate command 243 * outside of this range. 244 */ 245 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 246 ISCSI_SNGT(cmdsn, cs->cs_cmdsn - 1 + maxtags)) { 247 CFISCSI_SESSION_UNLOCK(cs); 248 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 249 "while expected %u", cmdsn, cs->cs_cmdsn); 250 return (true); 251 } 252 253 /* 254 * We don't support multiple connections now, so any 255 * discontinuity in CmdSN means lost PDUs. Since we don't 256 * support PDU retransmission -- terminate the connection. 257 */ 258 if (cmdsn != cs->cs_cmdsn) { 259 CFISCSI_SESSION_UNLOCK(cs); 260 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 261 "while expected %u; dropping connection", 262 cmdsn, cs->cs_cmdsn); 263 cfiscsi_session_terminate(cs); 264 return (true); 265 } 266 cs->cs_cmdsn++; 267 } 268 269 CFISCSI_SESSION_UNLOCK(cs); 270 271 return (false); 272} 273 274static void 275cfiscsi_pdu_handle(struct icl_pdu *request) 276{ 277 struct cfiscsi_session *cs; 278 bool ignore; 279 280 cs = PDU_SESSION(request); 281 282 ignore = cfiscsi_pdu_update_cmdsn(request); 283 if (ignore) { 284 icl_pdu_free(request); 285 return; 286 } 287 288 /* 289 * Handle the PDU; this includes e.g. receiving the remaining 290 * part of PDU and submitting the SCSI command to CTL 291 * or queueing a reply. The handling routine is responsible 292 * for freeing the PDU when it's no longer needed. 293 */ 294 switch (request->ip_bhs->bhs_opcode & 295 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 296 case ISCSI_BHS_OPCODE_NOP_OUT: 297 cfiscsi_pdu_handle_nop_out(request); 298 break; 299 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 300 cfiscsi_pdu_handle_scsi_command(request); 301 break; 302 case ISCSI_BHS_OPCODE_TASK_REQUEST: 303 cfiscsi_pdu_handle_task_request(request); 304 break; 305 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 306 cfiscsi_pdu_handle_data_out(request); 307 break; 308 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 309 cfiscsi_pdu_handle_logout_request(request); 310 break; 311 default: 312 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 313 "opcode 0x%x; dropping connection", 314 request->ip_bhs->bhs_opcode); 315 icl_pdu_free(request); 316 cfiscsi_session_terminate(cs); 317 } 318 319} 320 321static void 322cfiscsi_receive_callback(struct icl_pdu *request) 323{ 324#ifdef ICL_KERNEL_PROXY 325 struct cfiscsi_session *cs; 326 327 cs = PDU_SESSION(request); 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 341static void 342cfiscsi_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 352static int 353cfiscsi_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 - 1 + 401 imax(0, maxtags - cs->cs_outstanding_ctl_pdus)); 402 403 if (advance_statsn) 404 cs->cs_statsn++; 405 406 return (0); 407} 408 409static void 410cfiscsi_pdu_queue(struct icl_pdu *response) 411{ 412 struct cfiscsi_session *cs; 413 414 cs = PDU_SESSION(response); 415 416 CFISCSI_SESSION_LOCK(cs); 417 cfiscsi_pdu_prepare(response); 418 icl_pdu_queue(response); 419 CFISCSI_SESSION_UNLOCK(cs); 420} 421 422static void 423cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 424{ 425 struct cfiscsi_session *cs; 426 struct iscsi_bhs_nop_out *bhsno; 427 struct iscsi_bhs_nop_in *bhsni; 428 struct icl_pdu *response; 429 void *data = NULL; 430 size_t datasize; 431 int error; 432 433 cs = PDU_SESSION(request); 434 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 435 436 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 437 /* 438 * Nothing to do, iscsi_pdu_update_statsn() already 439 * zeroed the timeout. 440 */ 441 icl_pdu_free(request); 442 return; 443 } 444 445 datasize = icl_pdu_data_segment_length(request); 446 if (datasize > 0) { 447 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 448 if (data == NULL) { 449 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 450 "dropping connection"); 451 icl_pdu_free(request); 452 cfiscsi_session_terminate(cs); 453 return; 454 } 455 icl_pdu_get_data(request, 0, data, datasize); 456 } 457 458 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 459 if (response == NULL) { 460 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 461 "droppping connection"); 462 free(data, M_CFISCSI); 463 icl_pdu_free(request); 464 cfiscsi_session_terminate(cs); 465 return; 466 } 467 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 468 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 469 bhsni->bhsni_flags = 0x80; 470 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 471 bhsni->bhsni_target_transfer_tag = 0xffffffff; 472 if (datasize > 0) { 473 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 474 if (error != 0) { 475 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 476 "dropping connection"); 477 free(data, M_CFISCSI); 478 icl_pdu_free(request); 479 icl_pdu_free(response); 480 cfiscsi_session_terminate(cs); 481 return; 482 } 483 free(data, M_CFISCSI); 484 } 485 486 icl_pdu_free(request); 487 cfiscsi_pdu_queue(response); 488} 489 490static void 491cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 492{ 493 struct iscsi_bhs_scsi_command *bhssc; 494 struct cfiscsi_session *cs; 495 union ctl_io *io; 496 int error; 497 498 cs = PDU_SESSION(request); 499 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 500 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 501 // bhssc->bhssc_initiator_task_tag); 502 503 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 504 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 505 "ImmediateData=No; dropping connection"); 506 icl_pdu_free(request); 507 cfiscsi_session_terminate(cs); 508 return; 509 } 510 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 511 ctl_zero_io(io); 512 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 513 io->io_hdr.io_type = CTL_IO_SCSI; 514 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 515 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 516 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 517 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 518 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 519 case BHSSC_FLAGS_ATTR_UNTAGGED: 520 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 521 break; 522 case BHSSC_FLAGS_ATTR_SIMPLE: 523 io->scsiio.tag_type = CTL_TAG_SIMPLE; 524 break; 525 case BHSSC_FLAGS_ATTR_ORDERED: 526 io->scsiio.tag_type = CTL_TAG_ORDERED; 527 break; 528 case BHSSC_FLAGS_ATTR_HOQ: 529 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 530 break; 531 case BHSSC_FLAGS_ATTR_ACA: 532 io->scsiio.tag_type = CTL_TAG_ACA; 533 break; 534 default: 535 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 536 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 537 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 538 break; 539 } 540 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 541 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 542 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 543 error = ctl_queue(io); 544 if (error != CTL_RETVAL_COMPLETE) { 545 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 546 "dropping connection", error); 547 ctl_free_io(io); 548 refcount_release(&cs->cs_outstanding_ctl_pdus); 549 icl_pdu_free(request); 550 cfiscsi_session_terminate(cs); 551 } 552} 553 554static void 555cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 556{ 557 struct iscsi_bhs_task_management_request *bhstmr; 558 struct iscsi_bhs_task_management_response *bhstmr2; 559 struct icl_pdu *response; 560 struct cfiscsi_session *cs; 561 union ctl_io *io; 562 int error; 563 564 cs = PDU_SESSION(request); 565 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 566 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 567 ctl_zero_io(io); 568 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 569 io->io_hdr.io_type = CTL_IO_TASK; 570 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 571 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 572 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 573 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 574 575 switch (bhstmr->bhstmr_function & ~0x80) { 576 case BHSTMR_FUNCTION_ABORT_TASK: 577#if 0 578 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 579#endif 580 io->taskio.task_action = CTL_TASK_ABORT_TASK; 581 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 582 break; 583 case BHSTMR_FUNCTION_ABORT_TASK_SET: 584#if 0 585 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 586#endif 587 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 588 break; 589 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 590#if 0 591 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 592#endif 593 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 594 break; 595 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 596#if 0 597 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 598#endif 599 io->taskio.task_action = CTL_TASK_LUN_RESET; 600 break; 601 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 602#if 0 603 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 604#endif 605 io->taskio.task_action = CTL_TASK_TARGET_RESET; 606 break; 607 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 608#if 0 609 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 610#endif 611 io->taskio.task_action = CTL_TASK_TARGET_RESET; 612 break; 613 case BHSTMR_FUNCTION_QUERY_TASK: 614#if 0 615 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 616#endif 617 io->taskio.task_action = CTL_TASK_QUERY_TASK; 618 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 619 break; 620 case BHSTMR_FUNCTION_QUERY_TASK_SET: 621#if 0 622 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 623#endif 624 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 625 break; 626 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 627#if 0 628 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 629#endif 630 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 631 break; 632 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 633#if 0 634 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 635#endif 636 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 637 break; 638 default: 639 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 640 bhstmr->bhstmr_function & ~0x80); 641 ctl_free_io(io); 642 643 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 644 if (response == NULL) { 645 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 646 "dropping connection"); 647 icl_pdu_free(request); 648 cfiscsi_session_terminate(cs); 649 return; 650 } 651 bhstmr2 = (struct iscsi_bhs_task_management_response *) 652 response->ip_bhs; 653 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 654 bhstmr2->bhstmr_flags = 0x80; 655 bhstmr2->bhstmr_response = 656 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 657 bhstmr2->bhstmr_initiator_task_tag = 658 bhstmr->bhstmr_initiator_task_tag; 659 icl_pdu_free(request); 660 cfiscsi_pdu_queue(response); 661 return; 662 } 663 664 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 665 error = ctl_queue(io); 666 if (error != CTL_RETVAL_COMPLETE) { 667 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 668 "dropping connection", error); 669 ctl_free_io(io); 670 refcount_release(&cs->cs_outstanding_ctl_pdus); 671 icl_pdu_free(request); 672 cfiscsi_session_terminate(cs); 673 } 674} 675 676static bool 677cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 678{ 679 struct iscsi_bhs_data_out *bhsdo; 680 struct cfiscsi_session *cs; 681 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 682 size_t copy_len, len, off, buffer_offset; 683 int ctl_sg_count; 684 union ctl_io *io; 685 686 cs = PDU_SESSION(request); 687 688 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 689 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 690 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 691 ISCSI_BHS_OPCODE_SCSI_COMMAND, 692 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 693 694 /* 695 * We're only using fields common for Data-Out and SCSI Command PDUs. 696 */ 697 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 698 699 io = cdw->cdw_ctl_io; 700 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 701 ("CTL_FLAG_DATA_IN")); 702 703#if 0 704 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 705 request->ip_data_len, io->scsiio.kern_total_len); 706#endif 707 708 if (io->scsiio.kern_sg_entries > 0) { 709 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 710 ctl_sg_count = io->scsiio.kern_sg_entries; 711 } else { 712 ctl_sglist = &ctl_sg_entry; 713 ctl_sglist->addr = io->scsiio.kern_data_ptr; 714 ctl_sglist->len = io->scsiio.kern_data_len; 715 ctl_sg_count = 1; 716 } 717 718 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 719 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 720 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 721 else 722 buffer_offset = 0; 723 len = icl_pdu_data_segment_length(request); 724 725 /* 726 * Make sure the offset, as sent by the initiator, matches the offset 727 * we're supposed to be at in the scatter-gather list. 728 */ 729 if (buffer_offset > 730 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 731 buffer_offset + len <= 732 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 733 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 734 "expected %zd; dropping connection", buffer_offset, 735 (size_t)io->scsiio.kern_rel_offset + 736 (size_t)io->scsiio.ext_data_filled); 737 ctl_set_data_phase_error(&io->scsiio); 738 cfiscsi_session_terminate(cs); 739 return (true); 740 } 741 742 /* 743 * This is the offset within the PDU data segment, as opposed 744 * to buffer_offset, which is the offset within the task (SCSI 745 * command). 746 */ 747 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 748 buffer_offset; 749 750 /* 751 * Iterate over the scatter/gather segments, filling them with data 752 * from the PDU data segment. Note that this can get called multiple 753 * times for one SCSI command; the cdw structure holds state for the 754 * scatter/gather list. 755 */ 756 for (;;) { 757 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 758 ("cdw->cdw_sg_index >= ctl_sg_count")); 759 if (cdw->cdw_sg_len == 0) { 760 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 761 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 762 } 763 KASSERT(off <= len, ("len > off")); 764 copy_len = len - off; 765 if (copy_len > cdw->cdw_sg_len) 766 copy_len = cdw->cdw_sg_len; 767 768 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 769 cdw->cdw_sg_addr += copy_len; 770 cdw->cdw_sg_len -= copy_len; 771 off += copy_len; 772 io->scsiio.ext_data_filled += copy_len; 773 io->scsiio.kern_data_resid -= copy_len; 774 775 if (cdw->cdw_sg_len == 0) { 776 /* 777 * End of current segment. 778 */ 779 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 780 /* 781 * Last segment in scatter/gather list. 782 */ 783 break; 784 } 785 cdw->cdw_sg_index++; 786 } 787 788 if (off == len) { 789 /* 790 * End of PDU payload. 791 */ 792 break; 793 } 794 } 795 796 if (len > off) { 797 /* 798 * In case of unsolicited data, it's possible that the buffer 799 * provided by CTL is smaller than negotiated FirstBurstLength. 800 * Just ignore the superfluous data; will ask for them with R2T 801 * on next call to cfiscsi_datamove(). 802 * 803 * This obviously can only happen with SCSI Command PDU. 804 */ 805 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 806 ISCSI_BHS_OPCODE_SCSI_COMMAND) 807 return (true); 808 809 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 810 "expected %zd; dropping connection", 811 icl_pdu_data_segment_length(request), off); 812 ctl_set_data_phase_error(&io->scsiio); 813 cfiscsi_session_terminate(cs); 814 return (true); 815 } 816 817 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 818 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 819 CFISCSI_SESSION_WARN(cs, "got the final packet without " 820 "the F flag; flags = 0x%x; dropping connection", 821 bhsdo->bhsdo_flags); 822 ctl_set_data_phase_error(&io->scsiio); 823 cfiscsi_session_terminate(cs); 824 return (true); 825 } 826 827 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 828 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 829 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 830 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 831 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 832 "transmitted size was %zd bytes instead of %d; " 833 "dropping connection", 834 (size_t)io->scsiio.ext_data_filled, 835 cdw->cdw_r2t_end); 836 ctl_set_data_phase_error(&io->scsiio); 837 cfiscsi_session_terminate(cs); 838 return (true); 839 } else { 840 /* 841 * For SCSI Command PDU, this just means we need to 842 * solicit more data by sending R2T. 843 */ 844 return (false); 845 } 846 } 847 848 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 849#if 0 850 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 851 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 852#endif 853 854 return (true); 855 } 856 857 return (false); 858} 859 860static void 861cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 862{ 863 struct iscsi_bhs_data_out *bhsdo; 864 struct cfiscsi_session *cs; 865 struct cfiscsi_data_wait *cdw = NULL; 866 union ctl_io *io; 867 bool done; 868 869 cs = PDU_SESSION(request); 870 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 871 872 CFISCSI_SESSION_LOCK(cs); 873 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 874#if 0 875 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 876 "ttt 0x%x, itt 0x%x", 877 bhsdo->bhsdo_target_transfer_tag, 878 bhsdo->bhsdo_initiator_task_tag, 879 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 880#endif 881 if (bhsdo->bhsdo_target_transfer_tag == 882 cdw->cdw_target_transfer_tag) 883 break; 884 } 885 CFISCSI_SESSION_UNLOCK(cs); 886 if (cdw == NULL) { 887 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 888 "0x%x, not found; dropping connection", 889 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 890 icl_pdu_free(request); 891 cfiscsi_session_terminate(cs); 892 return; 893 } 894 895 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 896 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 897 "DataSN %u, while expected %u; dropping connection", 898 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 899 icl_pdu_free(request); 900 cfiscsi_session_terminate(cs); 901 return; 902 } 903 cdw->cdw_datasn++; 904 905 io = cdw->cdw_ctl_io; 906 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 907 ("CTL_FLAG_DATA_IN")); 908 909 done = cfiscsi_handle_data_segment(request, cdw); 910 if (done) { 911 CFISCSI_SESSION_LOCK(cs); 912 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 913 CFISCSI_SESSION_UNLOCK(cs); 914 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 915 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 916 cfiscsi_data_wait_free(cs, cdw); 917 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 918 if (done) 919 io->scsiio.be_move_done(io); 920 else 921 cfiscsi_datamove_out(io); 922 } 923 924 icl_pdu_free(request); 925} 926 927static void 928cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 929{ 930 struct iscsi_bhs_logout_request *bhslr; 931 struct iscsi_bhs_logout_response *bhslr2; 932 struct icl_pdu *response; 933 struct cfiscsi_session *cs; 934 935 cs = PDU_SESSION(request); 936 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 937 switch (bhslr->bhslr_reason & 0x7f) { 938 case BHSLR_REASON_CLOSE_SESSION: 939 case BHSLR_REASON_CLOSE_CONNECTION: 940 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 941 if (response == NULL) { 942 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 943 icl_pdu_free(request); 944 cfiscsi_session_terminate(cs); 945 return; 946 } 947 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 948 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 949 bhslr2->bhslr_flags = 0x80; 950 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 951 bhslr2->bhslr_initiator_task_tag = 952 bhslr->bhslr_initiator_task_tag; 953 icl_pdu_free(request); 954 cfiscsi_pdu_queue(response); 955 cfiscsi_session_terminate(cs); 956 break; 957 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 958 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 959 if (response == NULL) { 960 CFISCSI_SESSION_WARN(cs, 961 "failed to allocate memory; dropping connection"); 962 icl_pdu_free(request); 963 cfiscsi_session_terminate(cs); 964 return; 965 } 966 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 967 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 968 bhslr2->bhslr_flags = 0x80; 969 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 970 bhslr2->bhslr_initiator_task_tag = 971 bhslr->bhslr_initiator_task_tag; 972 icl_pdu_free(request); 973 cfiscsi_pdu_queue(response); 974 break; 975 default: 976 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 977 bhslr->bhslr_reason); 978 icl_pdu_free(request); 979 cfiscsi_session_terminate(cs); 980 break; 981 } 982} 983 984static void 985cfiscsi_callout(void *context) 986{ 987 struct icl_pdu *cp; 988 struct iscsi_bhs_nop_in *bhsni; 989 struct cfiscsi_session *cs; 990 991 cs = context; 992 993 if (cs->cs_terminating) 994 return; 995 996 callout_schedule(&cs->cs_callout, 1 * hz); 997 998 atomic_add_int(&cs->cs_timeout, 1); 999 1000#ifdef ICL_KERNEL_PROXY 1001 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1002 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1003 CFISCSI_SESSION_WARN(cs, "login timed out after " 1004 "%d seconds; dropping connection", cs->cs_timeout); 1005 cfiscsi_session_terminate(cs); 1006 } 1007 return; 1008 } 1009#endif 1010 1011 if (ping_timeout <= 0) { 1012 /* 1013 * Pings are disabled. Don't send NOP-In in this case; 1014 * user might have disabled pings to work around problems 1015 * with certain initiators that can't properly handle 1016 * NOP-In, such as iPXE. Reset the timeout, to avoid 1017 * triggering reconnection, should the user decide to 1018 * reenable them. 1019 */ 1020 cs->cs_timeout = 0; 1021 return; 1022 } 1023 1024 if (cs->cs_timeout >= ping_timeout) { 1025 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1026 "dropping connection", ping_timeout); 1027 cfiscsi_session_terminate(cs); 1028 return; 1029 } 1030 1031 /* 1032 * If the ping was reset less than one second ago - which means 1033 * that we've received some PDU during the last second - assume 1034 * the traffic flows correctly and don't bother sending a NOP-Out. 1035 * 1036 * (It's 2 - one for one second, and one for incrementing is_timeout 1037 * earlier in this routine.) 1038 */ 1039 if (cs->cs_timeout < 2) 1040 return; 1041 1042 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1043 if (cp == NULL) { 1044 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1045 return; 1046 } 1047 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1048 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1049 bhsni->bhsni_flags = 0x80; 1050 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1051 1052 cfiscsi_pdu_queue(cp); 1053} 1054 1055static struct cfiscsi_data_wait * 1056cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1057 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1058{ 1059 struct cfiscsi_data_wait *cdw; 1060 int error; 1061 1062 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1063 if (cdw == NULL) { 1064 CFISCSI_SESSION_WARN(cs, 1065 "failed to allocate %zd bytes", sizeof(*cdw)); 1066 return (NULL); 1067 } 1068 1069 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1070 &cdw->cdw_icl_prv); 1071 if (error != 0) { 1072 CFISCSI_SESSION_WARN(cs, 1073 "icl_conn_transfer_setup() failed with error %d", error); 1074 uma_zfree(cfiscsi_data_wait_zone, cdw); 1075 return (NULL); 1076 } 1077 1078 cdw->cdw_ctl_io = io; 1079 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1080 cdw->cdw_initiator_task_tag = initiator_task_tag; 1081 1082 return (cdw); 1083} 1084 1085static void 1086cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1087 struct cfiscsi_data_wait *cdw) 1088{ 1089 1090 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1091 uma_zfree(cfiscsi_data_wait_zone, cdw); 1092} 1093 1094static void 1095cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1096{ 1097 struct cfiscsi_data_wait *cdw; 1098 union ctl_io *io; 1099 int error, last, wait; 1100 1101 if (cs->cs_target == NULL) 1102 return; /* No target yet, so nothing to do. */ 1103 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1104 ctl_zero_io(io); 1105 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1106 io->io_hdr.io_type = CTL_IO_TASK; 1107 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1108 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1109 io->io_hdr.nexus.targ_lun = 0; 1110 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1111 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1112 wait = cs->cs_outstanding_ctl_pdus; 1113 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1114 error = ctl_queue(io); 1115 if (error != CTL_RETVAL_COMPLETE) { 1116 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1117 refcount_release(&cs->cs_outstanding_ctl_pdus); 1118 ctl_free_io(io); 1119 } 1120 1121 CFISCSI_SESSION_LOCK(cs); 1122 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1123 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1124 CFISCSI_SESSION_UNLOCK(cs); 1125 /* 1126 * Set nonzero port status; this prevents backends from 1127 * assuming that the data transfer actually succeeded 1128 * and writing uninitialized data to disk. 1129 */ 1130 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1131 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1132 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1133 cfiscsi_data_wait_free(cs, cdw); 1134 CFISCSI_SESSION_LOCK(cs); 1135 } 1136 CFISCSI_SESSION_UNLOCK(cs); 1137 1138 /* 1139 * Wait for CTL to terminate all the tasks. 1140 */ 1141 if (wait > 0) 1142 CFISCSI_SESSION_WARN(cs, 1143 "waiting for CTL to terminate %d tasks", wait); 1144 for (;;) { 1145 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1146 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1147 if (last != 0) 1148 break; 1149 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1150 0, "cfiscsi_terminate", hz / 100); 1151 } 1152 if (wait > 0) 1153 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1154} 1155 1156static void 1157cfiscsi_maintenance_thread(void *arg) 1158{ 1159 struct cfiscsi_session *cs; 1160 1161 cs = arg; 1162 1163 for (;;) { 1164 CFISCSI_SESSION_LOCK(cs); 1165 if (cs->cs_terminating == false) 1166 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1167 CFISCSI_SESSION_UNLOCK(cs); 1168 1169 if (cs->cs_terminating) { 1170 1171 /* 1172 * We used to wait up to 30 seconds to deliver queued 1173 * PDUs to the initiator. We also tried hard to deliver 1174 * SCSI Responses for the aborted PDUs. We don't do 1175 * that anymore. We might need to revisit that. 1176 */ 1177 callout_drain(&cs->cs_callout); 1178 icl_conn_close(cs->cs_conn); 1179 1180 /* 1181 * At this point ICL receive thread is no longer 1182 * running; no new tasks can be queued. 1183 */ 1184 cfiscsi_session_terminate_tasks(cs); 1185 cfiscsi_session_delete(cs); 1186 kthread_exit(); 1187 return; 1188 } 1189 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1190 } 1191} 1192 1193static void 1194cfiscsi_session_terminate(struct cfiscsi_session *cs) 1195{ 1196 1197 if (cs->cs_terminating) 1198 return; 1199 cs->cs_terminating = true; 1200 cv_signal(&cs->cs_maintenance_cv); 1201#ifdef ICL_KERNEL_PROXY 1202 cv_signal(&cs->cs_login_cv); 1203#endif 1204} 1205 1206static int 1207cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1208{ 1209 struct cfiscsi_target *ct; 1210 char *name; 1211 int i; 1212 1213 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1214 1215 ct = cs->cs_target; 1216 name = strdup(cs->cs_initiator_id, M_CTL); 1217 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1218 if (i < 0) { 1219 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1220 i); 1221 cs->cs_ctl_initid = -1; 1222 return (1); 1223 } 1224 cs->cs_ctl_initid = i; 1225#if 0 1226 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1227#endif 1228 1229 return (0); 1230} 1231 1232static void 1233cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1234{ 1235 int error; 1236 1237 if (cs->cs_ctl_initid == -1) 1238 return; 1239 1240 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1241 if (error != 0) { 1242 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1243 error); 1244 } 1245 cs->cs_ctl_initid = -1; 1246} 1247 1248static struct cfiscsi_session * 1249cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1250{ 1251 struct cfiscsi_session *cs; 1252 int error; 1253 1254 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1255 if (cs == NULL) { 1256 CFISCSI_WARN("malloc failed"); 1257 return (NULL); 1258 } 1259 cs->cs_ctl_initid = -1; 1260 1261 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1262 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1263 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1264 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1265#ifdef ICL_KERNEL_PROXY 1266 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1267#endif 1268 1269 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); 1270 if (cs->cs_conn == NULL) { 1271 free(cs, M_CFISCSI); 1272 return (NULL); 1273 } 1274 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1275 cs->cs_conn->ic_error = cfiscsi_error_callback; 1276 cs->cs_conn->ic_prv0 = cs; 1277 1278 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1279 if (error != 0) { 1280 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1281 free(cs, M_CFISCSI); 1282 return (NULL); 1283 } 1284 1285 mtx_lock(&softc->lock); 1286 cs->cs_id = ++softc->last_session_id; 1287 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1288 mtx_unlock(&softc->lock); 1289 1290 /* 1291 * Start pinging the initiator. 1292 */ 1293 callout_init(&cs->cs_callout, 1); 1294 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1295 1296 return (cs); 1297} 1298 1299static void 1300cfiscsi_session_delete(struct cfiscsi_session *cs) 1301{ 1302 struct cfiscsi_softc *softc; 1303 1304 softc = &cfiscsi_softc; 1305 1306 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1307 ("destroying session with outstanding CTL pdus")); 1308 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1309 ("destroying session with non-empty queue")); 1310 1311 mtx_lock(&softc->lock); 1312 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1313 mtx_unlock(&softc->lock); 1314 1315 cfiscsi_session_unregister_initiator(cs); 1316 if (cs->cs_target != NULL) 1317 cfiscsi_target_release(cs->cs_target); 1318 icl_conn_close(cs->cs_conn); 1319 icl_conn_free(cs->cs_conn); 1320 free(cs, M_CFISCSI); 1321 cv_signal(&softc->sessions_cv); 1322} 1323 1324static int 1325cfiscsi_init(void) 1326{ 1327 struct cfiscsi_softc *softc; 1328 1329 softc = &cfiscsi_softc; 1330 bzero(softc, sizeof(*softc)); 1331 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1332 1333 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1334#ifdef ICL_KERNEL_PROXY 1335 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1336#endif 1337 TAILQ_INIT(&softc->sessions); 1338 TAILQ_INIT(&softc->targets); 1339 1340 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1341 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1342 UMA_ALIGN_PTR, 0); 1343 1344 return (0); 1345} 1346 1347static int 1348cfiscsi_shutdown(void) 1349{ 1350 struct cfiscsi_softc *softc = &cfiscsi_softc; 1351 1352 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) 1353 return (EBUSY); 1354 1355 uma_zdestroy(cfiscsi_data_wait_zone); 1356#ifdef ICL_KERNEL_PROXY 1357 cv_destroy(&softc->accept_cv); 1358#endif 1359 cv_destroy(&softc->sessions_cv); 1360 mtx_destroy(&softc->lock); 1361 return (0); 1362} 1363 1364#ifdef ICL_KERNEL_PROXY 1365static void 1366cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1367{ 1368 struct cfiscsi_session *cs; 1369 1370 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1371 if (cs == NULL) { 1372 CFISCSI_WARN("failed to create session"); 1373 return; 1374 } 1375 1376 icl_conn_handoff_sock(cs->cs_conn, so); 1377 cs->cs_initiator_sa = sa; 1378 cs->cs_portal_id = portal_id; 1379 cs->cs_waiting_for_ctld = true; 1380 cv_signal(&cfiscsi_softc.accept_cv); 1381} 1382#endif 1383 1384static void 1385cfiscsi_online(void *arg) 1386{ 1387 struct cfiscsi_softc *softc; 1388 struct cfiscsi_target *ct; 1389 int online; 1390 1391 ct = (struct cfiscsi_target *)arg; 1392 softc = ct->ct_softc; 1393 1394 mtx_lock(&softc->lock); 1395 if (ct->ct_online) { 1396 mtx_unlock(&softc->lock); 1397 return; 1398 } 1399 ct->ct_online = 1; 1400 online = softc->online++; 1401 mtx_unlock(&softc->lock); 1402 if (online > 0) 1403 return; 1404 1405#ifdef ICL_KERNEL_PROXY 1406 if (softc->listener != NULL) 1407 icl_listen_free(softc->listener); 1408 softc->listener = icl_listen_new(cfiscsi_accept); 1409#endif 1410} 1411 1412static void 1413cfiscsi_offline(void *arg) 1414{ 1415 struct cfiscsi_softc *softc; 1416 struct cfiscsi_target *ct; 1417 struct cfiscsi_session *cs; 1418 int online; 1419 1420 ct = (struct cfiscsi_target *)arg; 1421 softc = ct->ct_softc; 1422 1423 mtx_lock(&softc->lock); 1424 if (!ct->ct_online) { 1425 mtx_unlock(&softc->lock); 1426 return; 1427 } 1428 ct->ct_online = 0; 1429 online = --softc->online; 1430 1431 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1432 if (cs->cs_target == ct) 1433 cfiscsi_session_terminate(cs); 1434 } 1435 do { 1436 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1437 if (cs->cs_target == ct) 1438 break; 1439 } 1440 if (cs != NULL) 1441 cv_wait(&softc->sessions_cv, &softc->lock); 1442 } while (cs != NULL && ct->ct_online == 0); 1443 mtx_unlock(&softc->lock); 1444 if (online > 0) 1445 return; 1446 1447#ifdef ICL_KERNEL_PROXY 1448 icl_listen_free(softc->listener); 1449 softc->listener = NULL; 1450#endif 1451} 1452 1453static int 1454cfiscsi_info(void *arg, struct sbuf *sb) 1455{ 1456 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1457 int retval; 1458 1459 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1460 ct->ct_state); 1461 return (retval); 1462} 1463 1464static void 1465cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1466{ 1467 struct cfiscsi_softc *softc; 1468 struct cfiscsi_session *cs, *cs2; 1469 struct cfiscsi_target *ct; 1470 struct ctl_iscsi_handoff_params *cihp; 1471 int error; 1472 1473 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1474 softc = &cfiscsi_softc; 1475 1476 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1477 cihp->initiator_name, cihp->initiator_addr, 1478 cihp->target_name); 1479 1480 ct = cfiscsi_target_find(softc, cihp->target_name, 1481 cihp->portal_group_tag); 1482 if (ct == NULL) { 1483 ci->status = CTL_ISCSI_ERROR; 1484 snprintf(ci->error_str, sizeof(ci->error_str), 1485 "%s: target not found", __func__); 1486 return; 1487 } 1488 1489#ifdef ICL_KERNEL_PROXY 1490 if (cihp->socket > 0 && cihp->connection_id > 0) { 1491 snprintf(ci->error_str, sizeof(ci->error_str), 1492 "both socket and connection_id set"); 1493 ci->status = CTL_ISCSI_ERROR; 1494 cfiscsi_target_release(ct); 1495 return; 1496 } 1497 if (cihp->socket == 0) { 1498 mtx_lock(&cfiscsi_softc.lock); 1499 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1500 if (cs->cs_id == cihp->connection_id) 1501 break; 1502 } 1503 if (cs == NULL) { 1504 mtx_unlock(&cfiscsi_softc.lock); 1505 snprintf(ci->error_str, sizeof(ci->error_str), 1506 "connection not found"); 1507 ci->status = CTL_ISCSI_ERROR; 1508 cfiscsi_target_release(ct); 1509 return; 1510 } 1511 mtx_unlock(&cfiscsi_softc.lock); 1512 } else { 1513#endif 1514 cs = cfiscsi_session_new(softc, cihp->offload); 1515 if (cs == NULL) { 1516 ci->status = CTL_ISCSI_ERROR; 1517 snprintf(ci->error_str, sizeof(ci->error_str), 1518 "%s: cfiscsi_session_new failed", __func__); 1519 cfiscsi_target_release(ct); 1520 return; 1521 } 1522#ifdef ICL_KERNEL_PROXY 1523 } 1524#endif 1525 1526 /* 1527 * First PDU of Full Feature phase has the same CmdSN as the last 1528 * PDU from the Login Phase received from the initiator. Thus, 1529 * the -1 below. 1530 */ 1531 cs->cs_cmdsn = cihp->cmdsn; 1532 cs->cs_statsn = cihp->statsn; 1533 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1534 cs->cs_max_burst_length = cihp->max_burst_length; 1535 cs->cs_first_burst_length = cihp->first_burst_length; 1536 cs->cs_immediate_data = !!cihp->immediate_data; 1537 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1538 cs->cs_conn->ic_header_crc32c = true; 1539 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1540 cs->cs_conn->ic_data_crc32c = true; 1541 1542 strlcpy(cs->cs_initiator_name, 1543 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1544 strlcpy(cs->cs_initiator_addr, 1545 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1546 strlcpy(cs->cs_initiator_alias, 1547 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1548 memcpy(cs->cs_initiator_isid, 1549 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1550 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1551 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1552 cihp->initiator_isid[0], cihp->initiator_isid[1], 1553 cihp->initiator_isid[2], cihp->initiator_isid[3], 1554 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1555 1556 mtx_lock(&softc->lock); 1557 if (ct->ct_online == 0) { 1558 mtx_unlock(&softc->lock); 1559 cfiscsi_session_terminate(cs); 1560 cfiscsi_target_release(ct); 1561 ci->status = CTL_ISCSI_ERROR; 1562 snprintf(ci->error_str, sizeof(ci->error_str), 1563 "%s: port offline", __func__); 1564 return; 1565 } 1566 cs->cs_target = ct; 1567 mtx_unlock(&softc->lock); 1568 1569 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1570restart: 1571 if (!cs->cs_terminating) { 1572 mtx_lock(&softc->lock); 1573 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1574 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1575 cs->cs_target == cs2->cs_target && 1576 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1577 if (strcmp(cs->cs_initiator_addr, 1578 cs2->cs_initiator_addr) != 0) { 1579 CFISCSI_SESSION_WARN(cs2, 1580 "session reinstatement from " 1581 "different address %s", 1582 cs->cs_initiator_addr); 1583 } else { 1584 CFISCSI_SESSION_DEBUG(cs2, 1585 "session reinstatement"); 1586 } 1587 cfiscsi_session_terminate(cs2); 1588 mtx_unlock(&softc->lock); 1589 pause("cfiscsi_reinstate", 1); 1590 goto restart; 1591 } 1592 } 1593 mtx_unlock(&softc->lock); 1594 } 1595 1596 /* 1597 * Register initiator with CTL. 1598 */ 1599 cfiscsi_session_register_initiator(cs); 1600 1601#ifdef ICL_KERNEL_PROXY 1602 if (cihp->socket > 0) { 1603#endif 1604 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1605 if (error != 0) { 1606 cfiscsi_session_terminate(cs); 1607 refcount_release(&cs->cs_outstanding_ctl_pdus); 1608 ci->status = CTL_ISCSI_ERROR; 1609 snprintf(ci->error_str, sizeof(ci->error_str), 1610 "%s: icl_conn_handoff failed with error %d", 1611 __func__, error); 1612 return; 1613 } 1614#ifdef ICL_KERNEL_PROXY 1615 } 1616#endif 1617 1618#ifdef ICL_KERNEL_PROXY 1619 cs->cs_login_phase = false; 1620 1621 /* 1622 * First PDU of the Full Feature phase has likely already arrived. 1623 * We have to pick it up and execute properly. 1624 */ 1625 if (cs->cs_login_pdu != NULL) { 1626 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1627 cfiscsi_pdu_handle(cs->cs_login_pdu); 1628 cs->cs_login_pdu = NULL; 1629 } 1630#endif 1631 1632 refcount_release(&cs->cs_outstanding_ctl_pdus); 1633 ci->status = CTL_ISCSI_OK; 1634} 1635 1636static void 1637cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1638{ 1639 struct ctl_iscsi_list_params *cilp; 1640 struct cfiscsi_session *cs; 1641 struct cfiscsi_softc *softc; 1642 struct sbuf *sb; 1643 int error; 1644 1645 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1646 softc = &cfiscsi_softc; 1647 1648 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1649 if (sb == NULL) { 1650 ci->status = CTL_ISCSI_ERROR; 1651 snprintf(ci->error_str, sizeof(ci->error_str), 1652 "Unable to allocate %d bytes for iSCSI session list", 1653 cilp->alloc_len); 1654 return; 1655 } 1656 1657 sbuf_printf(sb, "<ctlislist>\n"); 1658 mtx_lock(&softc->lock); 1659 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1660#ifdef ICL_KERNEL_PROXY 1661 if (cs->cs_target == NULL) 1662 continue; 1663#endif 1664 error = sbuf_printf(sb, "<connection id=\"%d\">" 1665 "<initiator>%s</initiator>" 1666 "<initiator_addr>%s</initiator_addr>" 1667 "<initiator_alias>%s</initiator_alias>" 1668 "<target>%s</target>" 1669 "<target_alias>%s</target_alias>" 1670 "<target_portal_group_tag>%u</target_portal_group_tag>" 1671 "<header_digest>%s</header_digest>" 1672 "<data_digest>%s</data_digest>" 1673 "<max_data_segment_length>%zd</max_data_segment_length>" 1674 "<max_burst_length>%zd</max_burst_length>" 1675 "<first_burst_length>%zd</first_burst_length>" 1676 "<immediate_data>%d</immediate_data>" 1677 "<iser>%d</iser>" 1678 "<offload>%s</offload>" 1679 "</connection>\n", 1680 cs->cs_id, 1681 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1682 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1683 cs->cs_target->ct_tag, 1684 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1685 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1686 cs->cs_max_data_segment_length, 1687 cs->cs_max_burst_length, 1688 cs->cs_first_burst_length, 1689 cs->cs_immediate_data, 1690 cs->cs_conn->ic_iser, 1691 cs->cs_conn->ic_offload); 1692 if (error != 0) 1693 break; 1694 } 1695 mtx_unlock(&softc->lock); 1696 error = sbuf_printf(sb, "</ctlislist>\n"); 1697 if (error != 0) { 1698 sbuf_delete(sb); 1699 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1700 snprintf(ci->error_str, sizeof(ci->error_str), 1701 "Out of space, %d bytes is too small", cilp->alloc_len); 1702 return; 1703 } 1704 sbuf_finish(sb); 1705 1706 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1707 if (error != 0) { 1708 sbuf_delete(sb); 1709 snprintf(ci->error_str, sizeof(ci->error_str), 1710 "copyout failed with error %d", error); 1711 ci->status = CTL_ISCSI_ERROR; 1712 return; 1713 } 1714 cilp->fill_len = sbuf_len(sb) + 1; 1715 ci->status = CTL_ISCSI_OK; 1716 sbuf_delete(sb); 1717} 1718 1719static void 1720cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1721{ 1722 struct icl_pdu *response; 1723 struct iscsi_bhs_asynchronous_message *bhsam; 1724 struct ctl_iscsi_logout_params *cilp; 1725 struct cfiscsi_session *cs; 1726 struct cfiscsi_softc *softc; 1727 int found = 0; 1728 1729 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1730 softc = &cfiscsi_softc; 1731 1732 mtx_lock(&softc->lock); 1733 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1734 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1735 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1736 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1737 continue; 1738 1739 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1740 if (response == NULL) { 1741 ci->status = CTL_ISCSI_ERROR; 1742 snprintf(ci->error_str, sizeof(ci->error_str), 1743 "Unable to allocate memory"); 1744 mtx_unlock(&softc->lock); 1745 return; 1746 } 1747 bhsam = 1748 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1749 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1750 bhsam->bhsam_flags = 0x80; 1751 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1752 bhsam->bhsam_parameter3 = htons(10); 1753 cfiscsi_pdu_queue(response); 1754 found++; 1755 } 1756 mtx_unlock(&softc->lock); 1757 1758 if (found == 0) { 1759 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1760 snprintf(ci->error_str, sizeof(ci->error_str), 1761 "No matching connections found"); 1762 return; 1763 } 1764 1765 ci->status = CTL_ISCSI_OK; 1766} 1767 1768static void 1769cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1770{ 1771 struct icl_pdu *response; 1772 struct iscsi_bhs_asynchronous_message *bhsam; 1773 struct ctl_iscsi_terminate_params *citp; 1774 struct cfiscsi_session *cs; 1775 struct cfiscsi_softc *softc; 1776 int found = 0; 1777 1778 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1779 softc = &cfiscsi_softc; 1780 1781 mtx_lock(&softc->lock); 1782 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1783 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1784 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1785 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1786 continue; 1787 1788 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1789 if (response == NULL) { 1790 /* 1791 * Oh well. Just terminate the connection. 1792 */ 1793 } else { 1794 bhsam = (struct iscsi_bhs_asynchronous_message *) 1795 response->ip_bhs; 1796 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1797 bhsam->bhsam_flags = 0x80; 1798 bhsam->bhsam_0xffffffff = 0xffffffff; 1799 bhsam->bhsam_async_event = 1800 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1801 cfiscsi_pdu_queue(response); 1802 } 1803 cfiscsi_session_terminate(cs); 1804 found++; 1805 } 1806 mtx_unlock(&softc->lock); 1807 1808 if (found == 0) { 1809 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1810 snprintf(ci->error_str, sizeof(ci->error_str), 1811 "No matching connections found"); 1812 return; 1813 } 1814 1815 ci->status = CTL_ISCSI_OK; 1816} 1817 1818static void 1819cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1820{ 1821 struct ctl_iscsi_limits_params *cilp; 1822 int error; 1823 1824 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1825 1826 error = icl_limits(cilp->offload, false, 1827 &cilp->data_segment_limit); 1828 if (error != 0) { 1829 ci->status = CTL_ISCSI_ERROR; 1830 snprintf(ci->error_str, sizeof(ci->error_str), 1831 "%s: icl_limits failed with error %d", 1832 __func__, error); 1833 return; 1834 } 1835 1836 ci->status = CTL_ISCSI_OK; 1837} 1838 1839#ifdef ICL_KERNEL_PROXY 1840static void 1841cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1842{ 1843 struct ctl_iscsi_listen_params *cilp; 1844 struct sockaddr *sa; 1845 int error; 1846 1847 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1848 1849 if (cfiscsi_softc.listener == NULL) { 1850 CFISCSI_DEBUG("no listener"); 1851 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1852 ci->status = CTL_ISCSI_ERROR; 1853 return; 1854 } 1855 1856 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1857 if (error != 0) { 1858 CFISCSI_DEBUG("getsockaddr, error %d", error); 1859 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1860 ci->status = CTL_ISCSI_ERROR; 1861 return; 1862 } 1863 1864 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1865 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1866 if (error != 0) { 1867 free(sa, M_SONAME); 1868 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1869 snprintf(ci->error_str, sizeof(ci->error_str), 1870 "icl_listen_add failed, error %d", error); 1871 ci->status = CTL_ISCSI_ERROR; 1872 return; 1873 } 1874 1875 ci->status = CTL_ISCSI_OK; 1876} 1877 1878static void 1879cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1880{ 1881 struct ctl_iscsi_accept_params *ciap; 1882 struct cfiscsi_session *cs; 1883 int error; 1884 1885 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1886 1887 mtx_lock(&cfiscsi_softc.lock); 1888 for (;;) { 1889 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1890 if (cs->cs_waiting_for_ctld) 1891 break; 1892 } 1893 if (cs != NULL) 1894 break; 1895 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1896 if (error != 0) { 1897 mtx_unlock(&cfiscsi_softc.lock); 1898 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1899 ci->status = CTL_ISCSI_ERROR; 1900 return; 1901 } 1902 } 1903 mtx_unlock(&cfiscsi_softc.lock); 1904 1905 cs->cs_waiting_for_ctld = false; 1906 cs->cs_login_phase = true; 1907 1908 ciap->connection_id = cs->cs_id; 1909 ciap->portal_id = cs->cs_portal_id; 1910 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1911 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1912 cs->cs_initiator_sa->sa_len); 1913 if (error != 0) { 1914 snprintf(ci->error_str, sizeof(ci->error_str), 1915 "copyout failed with error %d", error); 1916 ci->status = CTL_ISCSI_ERROR; 1917 return; 1918 } 1919 1920 ci->status = CTL_ISCSI_OK; 1921} 1922 1923static void 1924cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1925{ 1926 struct ctl_iscsi_send_params *cisp; 1927 struct cfiscsi_session *cs; 1928 struct icl_pdu *ip; 1929 size_t datalen; 1930 void *data; 1931 int error; 1932 1933 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1934 1935 mtx_lock(&cfiscsi_softc.lock); 1936 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1937 if (cs->cs_id == cisp->connection_id) 1938 break; 1939 } 1940 if (cs == NULL) { 1941 mtx_unlock(&cfiscsi_softc.lock); 1942 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1943 ci->status = CTL_ISCSI_ERROR; 1944 return; 1945 } 1946 mtx_unlock(&cfiscsi_softc.lock); 1947 1948#if 0 1949 if (cs->cs_login_phase == false) 1950 return (EBUSY); 1951#endif 1952 1953 if (cs->cs_terminating) { 1954 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1955 ci->status = CTL_ISCSI_ERROR; 1956 return; 1957 } 1958 1959 datalen = cisp->data_segment_len; 1960 /* 1961 * XXX 1962 */ 1963 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1964 if (datalen > 65535) { 1965 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1966 ci->status = CTL_ISCSI_ERROR; 1967 return; 1968 } 1969 if (datalen > 0) { 1970 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1971 error = copyin(cisp->data_segment, data, datalen); 1972 if (error != 0) { 1973 free(data, M_CFISCSI); 1974 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1975 ci->status = CTL_ISCSI_ERROR; 1976 return; 1977 } 1978 } 1979 1980 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1981 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1982 if (datalen > 0) { 1983 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1984 free(data, M_CFISCSI); 1985 } 1986 CFISCSI_SESSION_LOCK(cs); 1987 icl_pdu_queue(ip); 1988 CFISCSI_SESSION_UNLOCK(cs); 1989 ci->status = CTL_ISCSI_OK; 1990} 1991 1992static void 1993cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1994{ 1995 struct ctl_iscsi_receive_params *cirp; 1996 struct cfiscsi_session *cs; 1997 struct icl_pdu *ip; 1998 void *data; 1999 int error; 2000 2001 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2002 2003 mtx_lock(&cfiscsi_softc.lock); 2004 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2005 if (cs->cs_id == cirp->connection_id) 2006 break; 2007 } 2008 if (cs == NULL) { 2009 mtx_unlock(&cfiscsi_softc.lock); 2010 snprintf(ci->error_str, sizeof(ci->error_str), 2011 "connection not found"); 2012 ci->status = CTL_ISCSI_ERROR; 2013 return; 2014 } 2015 mtx_unlock(&cfiscsi_softc.lock); 2016 2017#if 0 2018 if (is->is_login_phase == false) 2019 return (EBUSY); 2020#endif 2021 2022 CFISCSI_SESSION_LOCK(cs); 2023 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2024 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2025 if (error != 0) { 2026 CFISCSI_SESSION_UNLOCK(cs); 2027 snprintf(ci->error_str, sizeof(ci->error_str), 2028 "interrupted by signal"); 2029 ci->status = CTL_ISCSI_ERROR; 2030 return; 2031 } 2032 } 2033 2034 if (cs->cs_terminating) { 2035 CFISCSI_SESSION_UNLOCK(cs); 2036 snprintf(ci->error_str, sizeof(ci->error_str), 2037 "connection terminating"); 2038 ci->status = CTL_ISCSI_ERROR; 2039 return; 2040 } 2041 ip = cs->cs_login_pdu; 2042 cs->cs_login_pdu = NULL; 2043 CFISCSI_SESSION_UNLOCK(cs); 2044 2045 if (ip->ip_data_len > cirp->data_segment_len) { 2046 icl_pdu_free(ip); 2047 snprintf(ci->error_str, sizeof(ci->error_str), 2048 "data segment too big"); 2049 ci->status = CTL_ISCSI_ERROR; 2050 return; 2051 } 2052 2053 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2054 if (ip->ip_data_len > 0) { 2055 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2056 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2057 copyout(data, cirp->data_segment, ip->ip_data_len); 2058 free(data, M_CFISCSI); 2059 } 2060 2061 icl_pdu_free(ip); 2062 ci->status = CTL_ISCSI_OK; 2063} 2064 2065#endif /* !ICL_KERNEL_PROXY */ 2066 2067static void 2068cfiscsi_ioctl_port_create(struct ctl_req *req) 2069{ 2070 struct cfiscsi_target *ct; 2071 struct ctl_port *port; 2072 const char *target, *alias, *tags; 2073 struct scsi_vpd_id_descriptor *desc; 2074 ctl_options_t opts; 2075 int retval, len, idlen; 2076 uint16_t tag; 2077 2078 ctl_init_opts(&opts, req->num_args, req->kern_args); 2079 target = ctl_get_opt(&opts, "cfiscsi_target"); 2080 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2081 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2082 if (target == NULL || tags == NULL) { 2083 req->status = CTL_LUN_ERROR; 2084 snprintf(req->error_str, sizeof(req->error_str), 2085 "Missing required argument"); 2086 ctl_free_opts(&opts); 2087 return; 2088 } 2089 tag = strtol(tags, (char **)NULL, 10); 2090 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2091 if (ct == NULL) { 2092 req->status = CTL_LUN_ERROR; 2093 snprintf(req->error_str, sizeof(req->error_str), 2094 "failed to create target \"%s\"", target); 2095 ctl_free_opts(&opts); 2096 return; 2097 } 2098 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2099 req->status = CTL_LUN_ERROR; 2100 snprintf(req->error_str, sizeof(req->error_str), 2101 "target \"%s\" for portal group tag %u already exists", 2102 target, tag); 2103 cfiscsi_target_release(ct); 2104 ctl_free_opts(&opts); 2105 return; 2106 } 2107 port = &ct->ct_port; 2108 // WAT 2109 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2110 goto done; 2111 2112 port->frontend = &cfiscsi_frontend; 2113 port->port_type = CTL_PORT_ISCSI; 2114 /* XXX KDM what should the real number be here? */ 2115 port->num_requested_ctl_io = 4096; 2116 port->port_name = "iscsi"; 2117 port->physical_port = tag; 2118 port->virtual_port = ct->ct_target_id; 2119 port->port_online = cfiscsi_online; 2120 port->port_offline = cfiscsi_offline; 2121 port->port_info = cfiscsi_info; 2122 port->onoff_arg = ct; 2123 port->fe_datamove = cfiscsi_datamove; 2124 port->fe_done = cfiscsi_done; 2125 2126 /* XXX KDM what should we report here? */ 2127 /* XXX These should probably be fetched from CTL. */ 2128 port->max_targets = 1; 2129 port->max_target_id = 15; 2130 port->targ_port = -1; 2131 2132 port->options = opts; 2133 STAILQ_INIT(&opts); 2134 2135 /* Generate Port ID. */ 2136 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2137 idlen = roundup2(idlen, 4); 2138 len = sizeof(struct scsi_vpd_device_id) + idlen; 2139 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2140 M_CTL, M_WAITOK | M_ZERO); 2141 port->port_devid->len = len; 2142 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2143 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2144 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2145 SVPD_ID_TYPE_SCSI_NAME; 2146 desc->length = idlen; 2147 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2148 2149 /* Generate Target ID. */ 2150 idlen = strlen(target) + 1; 2151 idlen = roundup2(idlen, 4); 2152 len = sizeof(struct scsi_vpd_device_id) + idlen; 2153 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2154 M_CTL, M_WAITOK | M_ZERO); 2155 port->target_devid->len = len; 2156 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2157 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2158 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2159 SVPD_ID_TYPE_SCSI_NAME; 2160 desc->length = idlen; 2161 strlcpy(desc->identifier, target, idlen); 2162 2163 retval = ctl_port_register(port); 2164 if (retval != 0) { 2165 ctl_free_opts(&port->options); 2166 free(port->port_devid, M_CFISCSI); 2167 free(port->target_devid, M_CFISCSI); 2168 cfiscsi_target_release(ct); 2169 req->status = CTL_LUN_ERROR; 2170 snprintf(req->error_str, sizeof(req->error_str), 2171 "ctl_port_register() failed with error %d", retval); 2172 return; 2173 } 2174done: 2175 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2176 req->status = CTL_LUN_OK; 2177 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2178 sizeof(port->targ_port)); //XXX 2179} 2180 2181static void 2182cfiscsi_ioctl_port_remove(struct ctl_req *req) 2183{ 2184 struct cfiscsi_target *ct; 2185 const char *target, *tags; 2186 ctl_options_t opts; 2187 uint16_t tag; 2188 2189 ctl_init_opts(&opts, req->num_args, req->kern_args); 2190 target = ctl_get_opt(&opts, "cfiscsi_target"); 2191 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2192 if (target == NULL || tags == NULL) { 2193 ctl_free_opts(&opts); 2194 req->status = CTL_LUN_ERROR; 2195 snprintf(req->error_str, sizeof(req->error_str), 2196 "Missing required argument"); 2197 return; 2198 } 2199 tag = strtol(tags, (char **)NULL, 10); 2200 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2201 if (ct == NULL) { 2202 ctl_free_opts(&opts); 2203 req->status = CTL_LUN_ERROR; 2204 snprintf(req->error_str, sizeof(req->error_str), 2205 "can't find target \"%s\"", target); 2206 return; 2207 } 2208 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2209 ctl_free_opts(&opts); 2210 req->status = CTL_LUN_ERROR; 2211 snprintf(req->error_str, sizeof(req->error_str), 2212 "target \"%s\" is already dying", target); 2213 return; 2214 } 2215 ctl_free_opts(&opts); 2216 2217 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2218 ctl_port_offline(&ct->ct_port); 2219 cfiscsi_target_release(ct); 2220 cfiscsi_target_release(ct); 2221 req->status = CTL_LUN_OK; 2222} 2223 2224static int 2225cfiscsi_ioctl(struct cdev *dev, 2226 u_long cmd, caddr_t addr, int flag, struct thread *td) 2227{ 2228 struct ctl_iscsi *ci; 2229 struct ctl_req *req; 2230 2231 if (cmd == CTL_PORT_REQ) { 2232 req = (struct ctl_req *)addr; 2233 switch (req->reqtype) { 2234 case CTL_REQ_CREATE: 2235 cfiscsi_ioctl_port_create(req); 2236 break; 2237 case CTL_REQ_REMOVE: 2238 cfiscsi_ioctl_port_remove(req); 2239 break; 2240 default: 2241 req->status = CTL_LUN_ERROR; 2242 snprintf(req->error_str, sizeof(req->error_str), 2243 "Unsupported request type %d", req->reqtype); 2244 } 2245 return (0); 2246 } 2247 2248 if (cmd != CTL_ISCSI) 2249 return (ENOTTY); 2250 2251 ci = (struct ctl_iscsi *)addr; 2252 switch (ci->type) { 2253 case CTL_ISCSI_HANDOFF: 2254 cfiscsi_ioctl_handoff(ci); 2255 break; 2256 case CTL_ISCSI_LIST: 2257 cfiscsi_ioctl_list(ci); 2258 break; 2259 case CTL_ISCSI_LOGOUT: 2260 cfiscsi_ioctl_logout(ci); 2261 break; 2262 case CTL_ISCSI_TERMINATE: 2263 cfiscsi_ioctl_terminate(ci); 2264 break; 2265 case CTL_ISCSI_LIMITS: 2266 cfiscsi_ioctl_limits(ci); 2267 break; 2268#ifdef ICL_KERNEL_PROXY 2269 case CTL_ISCSI_LISTEN: 2270 cfiscsi_ioctl_listen(ci); 2271 break; 2272 case CTL_ISCSI_ACCEPT: 2273 cfiscsi_ioctl_accept(ci); 2274 break; 2275 case CTL_ISCSI_SEND: 2276 cfiscsi_ioctl_send(ci); 2277 break; 2278 case CTL_ISCSI_RECEIVE: 2279 cfiscsi_ioctl_receive(ci); 2280 break; 2281#else 2282 case CTL_ISCSI_LISTEN: 2283 case CTL_ISCSI_ACCEPT: 2284 case CTL_ISCSI_SEND: 2285 case CTL_ISCSI_RECEIVE: 2286 ci->status = CTL_ISCSI_ERROR; 2287 snprintf(ci->error_str, sizeof(ci->error_str), 2288 "%s: CTL compiled without ICL_KERNEL_PROXY", 2289 __func__); 2290 break; 2291#endif /* !ICL_KERNEL_PROXY */ 2292 default: 2293 ci->status = CTL_ISCSI_ERROR; 2294 snprintf(ci->error_str, sizeof(ci->error_str), 2295 "%s: invalid iSCSI request type %d", __func__, ci->type); 2296 break; 2297 } 2298 2299 return (0); 2300} 2301 2302static void 2303cfiscsi_target_hold(struct cfiscsi_target *ct) 2304{ 2305 2306 refcount_acquire(&ct->ct_refcount); 2307} 2308 2309static void 2310cfiscsi_target_release(struct cfiscsi_target *ct) 2311{ 2312 struct cfiscsi_softc *softc; 2313 2314 softc = ct->ct_softc; 2315 mtx_lock(&softc->lock); 2316 if (refcount_release(&ct->ct_refcount)) { 2317 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2318 mtx_unlock(&softc->lock); 2319 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2320 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2321 if (ctl_port_deregister(&ct->ct_port) != 0) 2322 printf("%s: ctl_port_deregister() failed\n", 2323 __func__); 2324 } 2325 free(ct, M_CFISCSI); 2326 2327 return; 2328 } 2329 mtx_unlock(&softc->lock); 2330} 2331 2332static struct cfiscsi_target * 2333cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2334{ 2335 struct cfiscsi_target *ct; 2336 2337 mtx_lock(&softc->lock); 2338 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2339 if (ct->ct_tag != tag || 2340 strcmp(name, ct->ct_name) != 0 || 2341 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2342 continue; 2343 cfiscsi_target_hold(ct); 2344 mtx_unlock(&softc->lock); 2345 return (ct); 2346 } 2347 mtx_unlock(&softc->lock); 2348 2349 return (NULL); 2350} 2351 2352static struct cfiscsi_target * 2353cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2354 const char *alias, uint16_t tag) 2355{ 2356 struct cfiscsi_target *ct, *newct; 2357 2358 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2359 return (NULL); 2360 2361 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2362 2363 mtx_lock(&softc->lock); 2364 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2365 if (ct->ct_tag != tag || 2366 strcmp(name, ct->ct_name) != 0 || 2367 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2368 continue; 2369 cfiscsi_target_hold(ct); 2370 mtx_unlock(&softc->lock); 2371 free(newct, M_CFISCSI); 2372 return (ct); 2373 } 2374 2375 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2376 if (alias != NULL) 2377 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2378 newct->ct_tag = tag; 2379 refcount_init(&newct->ct_refcount, 1); 2380 newct->ct_softc = softc; 2381 if (TAILQ_EMPTY(&softc->targets)) 2382 softc->last_target_id = 0; 2383 newct->ct_target_id = ++softc->last_target_id; 2384 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2385 mtx_unlock(&softc->lock); 2386 2387 return (newct); 2388} 2389 2390static void 2391cfiscsi_datamove_in(union ctl_io *io) 2392{ 2393 struct cfiscsi_session *cs; 2394 struct icl_pdu *request, *response; 2395 const struct iscsi_bhs_scsi_command *bhssc; 2396 struct iscsi_bhs_data_in *bhsdi; 2397 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2398 size_t len, expected_len, sg_len, buffer_offset; 2399 const char *sg_addr; 2400 int ctl_sg_count, error, i; 2401 2402 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2403 cs = PDU_SESSION(request); 2404 2405 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2406 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2407 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2408 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2409 2410 if (io->scsiio.kern_sg_entries > 0) { 2411 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2412 ctl_sg_count = io->scsiio.kern_sg_entries; 2413 } else { 2414 ctl_sglist = &ctl_sg_entry; 2415 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2416 ctl_sglist->len = io->scsiio.kern_data_len; 2417 ctl_sg_count = 1; 2418 } 2419 2420 /* 2421 * This is the total amount of data to be transferred within the current 2422 * SCSI command. We need to record it so that we can properly report 2423 * underflow/underflow. 2424 */ 2425 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2426 2427 /* 2428 * This is the offset within the current SCSI command; for the first 2429 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2430 * it will be the sum of lengths of previous ones. 2431 */ 2432 buffer_offset = io->scsiio.kern_rel_offset; 2433 2434 /* 2435 * This is the transfer length expected by the initiator. In theory, 2436 * it could be different from the correct amount of data from the SCSI 2437 * point of view, even if that doesn't make any sense. 2438 */ 2439 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2440#if 0 2441 if (expected_len != io->scsiio.kern_total_len) { 2442 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2443 "actual length %zd", expected_len, 2444 (size_t)io->scsiio.kern_total_len); 2445 } 2446#endif 2447 2448 if (buffer_offset >= expected_len) { 2449#if 0 2450 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2451 "already sent the expected len", buffer_offset); 2452#endif 2453 io->scsiio.be_move_done(io); 2454 return; 2455 } 2456 2457 i = 0; 2458 sg_addr = NULL; 2459 sg_len = 0; 2460 response = NULL; 2461 bhsdi = NULL; 2462 for (;;) { 2463 if (response == NULL) { 2464 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2465 if (response == NULL) { 2466 CFISCSI_SESSION_WARN(cs, "failed to " 2467 "allocate memory; dropping connection"); 2468 ctl_set_busy(&io->scsiio); 2469 io->scsiio.be_move_done(io); 2470 cfiscsi_session_terminate(cs); 2471 return; 2472 } 2473 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2474 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2475 bhsdi->bhsdi_initiator_task_tag = 2476 bhssc->bhssc_initiator_task_tag; 2477 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2478 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2479 PDU_EXPDATASN(request)++; 2480 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2481 } 2482 2483 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2484 if (sg_len == 0) { 2485 sg_addr = ctl_sglist[i].addr; 2486 sg_len = ctl_sglist[i].len; 2487 KASSERT(sg_len > 0, ("sg_len <= 0")); 2488 } 2489 2490 len = sg_len; 2491 2492 /* 2493 * Truncate to maximum data segment length. 2494 */ 2495 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2496 ("ip_data_len %zd >= max_data_segment_length %zd", 2497 response->ip_data_len, cs->cs_max_data_segment_length)); 2498 if (response->ip_data_len + len > 2499 cs->cs_max_data_segment_length) { 2500 len = cs->cs_max_data_segment_length - 2501 response->ip_data_len; 2502 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2503 len, sg_len)); 2504 } 2505 2506 /* 2507 * Truncate to expected data transfer length. 2508 */ 2509 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2510 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2511 buffer_offset, response->ip_data_len, expected_len)); 2512 if (buffer_offset + response->ip_data_len + len > expected_len) { 2513 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2514 "to expected data transfer length %zd", 2515 buffer_offset + response->ip_data_len + len, expected_len); 2516 len = expected_len - (buffer_offset + response->ip_data_len); 2517 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2518 len, sg_len)); 2519 } 2520 2521 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2522 if (error != 0) { 2523 CFISCSI_SESSION_WARN(cs, "failed to " 2524 "allocate memory; dropping connection"); 2525 icl_pdu_free(response); 2526 ctl_set_busy(&io->scsiio); 2527 io->scsiio.be_move_done(io); 2528 cfiscsi_session_terminate(cs); 2529 return; 2530 } 2531 sg_addr += len; 2532 sg_len -= len; 2533 io->scsiio.kern_data_resid -= len; 2534 2535 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2536 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2537 buffer_offset, response->ip_data_len, expected_len)); 2538 if (buffer_offset + response->ip_data_len == expected_len) { 2539 /* 2540 * Already have the amount of data the initiator wanted. 2541 */ 2542 break; 2543 } 2544 2545 if (sg_len == 0) { 2546 /* 2547 * End of scatter-gather segment; 2548 * proceed to the next one... 2549 */ 2550 if (i == ctl_sg_count - 1) { 2551 /* 2552 * ... unless this was the last one. 2553 */ 2554 break; 2555 } 2556 i++; 2557 } 2558 2559 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2560 /* 2561 * Can't stuff more data into the current PDU; 2562 * queue it. Note that's not enough to check 2563 * for kern_data_resid == 0 instead; there 2564 * may be several Data-In PDUs for the final 2565 * call to cfiscsi_datamove(), and we want 2566 * to set the F flag only on the last of them. 2567 */ 2568 buffer_offset += response->ip_data_len; 2569 if (buffer_offset == io->scsiio.kern_total_len || 2570 buffer_offset == expected_len) { 2571 buffer_offset -= response->ip_data_len; 2572 break; 2573 } 2574 cfiscsi_pdu_queue(response); 2575 response = NULL; 2576 bhsdi = NULL; 2577 } 2578 } 2579 if (response != NULL) { 2580 buffer_offset += response->ip_data_len; 2581 if (buffer_offset == io->scsiio.kern_total_len || 2582 buffer_offset == expected_len) { 2583 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2584 if (io->io_hdr.status == CTL_SUCCESS) { 2585 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2586 if (PDU_TOTAL_TRANSFER_LEN(request) < 2587 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2588 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2589 bhsdi->bhsdi_residual_count = 2590 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2591 PDU_TOTAL_TRANSFER_LEN(request)); 2592 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2593 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2594 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2595 bhsdi->bhsdi_residual_count = 2596 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2597 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2598 } 2599 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2600 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2601 } 2602 } 2603 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2604 cfiscsi_pdu_queue(response); 2605 } 2606 2607 io->scsiio.be_move_done(io); 2608} 2609 2610static void 2611cfiscsi_datamove_out(union ctl_io *io) 2612{ 2613 struct cfiscsi_session *cs; 2614 struct icl_pdu *request, *response; 2615 const struct iscsi_bhs_scsi_command *bhssc; 2616 struct iscsi_bhs_r2t *bhsr2t; 2617 struct cfiscsi_data_wait *cdw; 2618 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2619 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2620 uint32_t target_transfer_tag; 2621 bool done; 2622 2623 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2624 cs = PDU_SESSION(request); 2625 2626 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2627 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2628 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2629 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2630 2631 /* 2632 * We need to record it so that we can properly report 2633 * underflow/underflow. 2634 */ 2635 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2636 2637 /* 2638 * Complete write underflow. Not a single byte to read. Return. 2639 */ 2640 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2641 if (io->scsiio.kern_rel_offset >= expected_len) { 2642 io->scsiio.be_move_done(io); 2643 return; 2644 } 2645 datamove_len = MIN(io->scsiio.kern_data_len, 2646 expected_len - io->scsiio.kern_rel_offset); 2647 2648 target_transfer_tag = 2649 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2650 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2651 &target_transfer_tag); 2652 if (cdw == NULL) { 2653 CFISCSI_SESSION_WARN(cs, "failed to " 2654 "allocate memory; dropping connection"); 2655 ctl_set_busy(&io->scsiio); 2656 io->scsiio.be_move_done(io); 2657 cfiscsi_session_terminate(cs); 2658 return; 2659 } 2660#if 0 2661 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2662 "task tag 0x%x, target transfer tag 0x%x", 2663 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2664#endif 2665 2666 cdw->cdw_ctl_io = io; 2667 cdw->cdw_target_transfer_tag = target_transfer_tag; 2668 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2669 cdw->cdw_r2t_end = datamove_len; 2670 cdw->cdw_datasn = 0; 2671 2672 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2673 if (io->scsiio.kern_sg_entries > 0) { 2674 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2675 } else { 2676 ctl_sglist = &ctl_sg_entry; 2677 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2678 ctl_sglist->len = datamove_len; 2679 } 2680 cdw->cdw_sg_index = 0; 2681 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2682 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2683 r2t_off = io->scsiio.ext_data_filled; 2684 while (r2t_off > 0) { 2685 if (r2t_off >= cdw->cdw_sg_len) { 2686 r2t_off -= cdw->cdw_sg_len; 2687 cdw->cdw_sg_index++; 2688 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2689 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2690 continue; 2691 } 2692 cdw->cdw_sg_addr += r2t_off; 2693 cdw->cdw_sg_len -= r2t_off; 2694 r2t_off = 0; 2695 } 2696 2697 if (cs->cs_immediate_data && 2698 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2699 icl_pdu_data_segment_length(request)) { 2700 done = cfiscsi_handle_data_segment(request, cdw); 2701 if (done) { 2702 cfiscsi_data_wait_free(cs, cdw); 2703 io->scsiio.be_move_done(io); 2704 return; 2705 } 2706 } 2707 2708 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2709 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2710 cs->cs_max_burst_length); 2711 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2712 2713 CFISCSI_SESSION_LOCK(cs); 2714 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2715 CFISCSI_SESSION_UNLOCK(cs); 2716 2717 /* 2718 * XXX: We should limit the number of outstanding R2T PDUs 2719 * per task to MaxOutstandingR2T. 2720 */ 2721 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2722 if (response == NULL) { 2723 CFISCSI_SESSION_WARN(cs, "failed to " 2724 "allocate memory; dropping connection"); 2725 ctl_set_busy(&io->scsiio); 2726 io->scsiio.be_move_done(io); 2727 cfiscsi_session_terminate(cs); 2728 return; 2729 } 2730 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2731 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2732 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2733 bhsr2t->bhsr2t_flags = 0x80; 2734 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2735 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2736 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2737 /* 2738 * XXX: Here we assume that cfiscsi_datamove() won't ever 2739 * be running concurrently on several CPUs for a given 2740 * command. 2741 */ 2742 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2743 PDU_R2TSN(request)++; 2744 /* 2745 * This is the offset within the current SCSI command; 2746 * i.e. for the first call of datamove(), it will be 0, 2747 * and for subsequent ones it will be the sum of lengths 2748 * of previous ones. 2749 * 2750 * The ext_data_filled is to account for unsolicited 2751 * (immediate) data that might have already arrived. 2752 */ 2753 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2754 /* 2755 * This is the total length (sum of S/G lengths) this call 2756 * to cfiscsi_datamove() is supposed to handle, limited by 2757 * MaxBurstLength. 2758 */ 2759 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2760 cfiscsi_pdu_queue(response); 2761} 2762 2763static void 2764cfiscsi_datamove(union ctl_io *io) 2765{ 2766 2767 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2768 cfiscsi_datamove_in(io); 2769 else { 2770 /* We hadn't received anything during this datamove yet. */ 2771 io->scsiio.ext_data_filled = 0; 2772 cfiscsi_datamove_out(io); 2773 } 2774} 2775 2776static void 2777cfiscsi_scsi_command_done(union ctl_io *io) 2778{ 2779 struct icl_pdu *request, *response; 2780 struct iscsi_bhs_scsi_command *bhssc; 2781 struct iscsi_bhs_scsi_response *bhssr; 2782#ifdef DIAGNOSTIC 2783 struct cfiscsi_data_wait *cdw; 2784#endif 2785 struct cfiscsi_session *cs; 2786 uint16_t sense_length; 2787 2788 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2789 cs = PDU_SESSION(request); 2790 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2791 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2792 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2793 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2794 2795 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2796 // bhssc->bhssc_initiator_task_tag); 2797 2798#ifdef DIAGNOSTIC 2799 CFISCSI_SESSION_LOCK(cs); 2800 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2801 KASSERT(bhssc->bhssc_initiator_task_tag != 2802 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2803 CFISCSI_SESSION_UNLOCK(cs); 2804#endif 2805 2806 /* 2807 * Do not return status for aborted commands. 2808 * There are exceptions, but none supported by CTL yet. 2809 */ 2810 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2811 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2812 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2813 ctl_free_io(io); 2814 icl_pdu_free(request); 2815 return; 2816 } 2817 2818 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2819 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2820 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2821 bhssr->bhssr_flags = 0x80; 2822 /* 2823 * XXX: We don't deal with bidirectional under/overflows; 2824 * does anything actually support those? 2825 */ 2826 if (PDU_TOTAL_TRANSFER_LEN(request) < 2827 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2828 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2829 bhssr->bhssr_residual_count = 2830 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2831 PDU_TOTAL_TRANSFER_LEN(request)); 2832 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2833 // ntohl(bhssr->bhssr_residual_count)); 2834 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2835 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2836 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2837 bhssr->bhssr_residual_count = 2838 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2839 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2840 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2841 // ntohl(bhssr->bhssr_residual_count)); 2842 } 2843 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2844 bhssr->bhssr_status = io->scsiio.scsi_status; 2845 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2846 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2847 2848 if (io->scsiio.sense_len > 0) { 2849#if 0 2850 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2851 io->scsiio.sense_len); 2852#endif 2853 sense_length = htons(io->scsiio.sense_len); 2854 icl_pdu_append_data(response, 2855 &sense_length, sizeof(sense_length), M_WAITOK); 2856 icl_pdu_append_data(response, 2857 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2858 } 2859 2860 ctl_free_io(io); 2861 icl_pdu_free(request); 2862 cfiscsi_pdu_queue(response); 2863} 2864 2865static void 2866cfiscsi_task_management_done(union ctl_io *io) 2867{ 2868 struct icl_pdu *request, *response; 2869 struct iscsi_bhs_task_management_request *bhstmr; 2870 struct iscsi_bhs_task_management_response *bhstmr2; 2871 struct cfiscsi_data_wait *cdw, *tmpcdw; 2872 struct cfiscsi_session *cs, *tcs; 2873 struct cfiscsi_softc *softc; 2874 int cold_reset = 0; 2875 2876 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2877 cs = PDU_SESSION(request); 2878 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2879 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2880 ISCSI_BHS_OPCODE_TASK_REQUEST, 2881 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2882 2883#if 0 2884 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2885 bhstmr->bhstmr_initiator_task_tag, 2886 bhstmr->bhstmr_referenced_task_tag); 2887#endif 2888 2889 if ((bhstmr->bhstmr_function & ~0x80) == 2890 BHSTMR_FUNCTION_ABORT_TASK) { 2891 /* 2892 * Make sure we no longer wait for Data-Out for this command. 2893 */ 2894 CFISCSI_SESSION_LOCK(cs); 2895 TAILQ_FOREACH_SAFE(cdw, 2896 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2897 if (bhstmr->bhstmr_referenced_task_tag != 2898 cdw->cdw_initiator_task_tag) 2899 continue; 2900 2901#if 0 2902 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2903 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2904#endif 2905 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2906 cdw, cdw_next); 2907 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2908 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2909 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2910 cfiscsi_data_wait_free(cs, cdw); 2911 } 2912 CFISCSI_SESSION_UNLOCK(cs); 2913 } 2914 if ((bhstmr->bhstmr_function & ~0x80) == 2915 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2916 io->io_hdr.status == CTL_SUCCESS) 2917 cold_reset = 1; 2918 2919 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2920 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2921 response->ip_bhs; 2922 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2923 bhstmr2->bhstmr_flags = 0x80; 2924 switch (io->taskio.task_status) { 2925 case CTL_TASK_FUNCTION_COMPLETE: 2926 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2927 break; 2928 case CTL_TASK_FUNCTION_SUCCEEDED: 2929 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2930 break; 2931 case CTL_TASK_LUN_DOES_NOT_EXIST: 2932 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2933 break; 2934 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2935 default: 2936 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2937 break; 2938 } 2939 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2940 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2941 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2942 2943 ctl_free_io(io); 2944 icl_pdu_free(request); 2945 cfiscsi_pdu_queue(response); 2946 2947 if (cold_reset) { 2948 softc = cs->cs_target->ct_softc; 2949 mtx_lock(&softc->lock); 2950 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2951 if (tcs->cs_target == cs->cs_target) 2952 cfiscsi_session_terminate(tcs); 2953 } 2954 mtx_unlock(&softc->lock); 2955 } 2956} 2957 2958static void 2959cfiscsi_done(union ctl_io *io) 2960{ 2961 struct icl_pdu *request; 2962 struct cfiscsi_session *cs; 2963 2964 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2965 ("invalid CTL status %#x", io->io_hdr.status)); 2966 2967 if (io->io_hdr.io_type == CTL_IO_TASK && 2968 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2969 /* 2970 * Implicit task termination has just completed; nothing to do. 2971 */ 2972 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2973 cs->cs_tasks_aborted = true; 2974 refcount_release(&cs->cs_outstanding_ctl_pdus); 2975 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2976 ctl_free_io(io); 2977 return; 2978 } 2979 2980 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2981 cs = PDU_SESSION(request); 2982 2983 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2984 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2985 cfiscsi_scsi_command_done(io); 2986 break; 2987 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2988 cfiscsi_task_management_done(io); 2989 break; 2990 default: 2991 panic("cfiscsi_done called with wrong opcode 0x%x", 2992 request->ip_bhs->bhs_opcode); 2993 } 2994 2995 refcount_release(&cs->cs_outstanding_ctl_pdus); 2996} 2997