ctl_frontend_iscsi.c revision 314584
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 314584 2017-03-03 06:06:27Z mav $ 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 314584 2017-03-03 06:06:27Z mav $"); 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(ctlcfiscsi, cfiscsi_frontend); 188MODULE_DEPEND(ctlcfiscsi, 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 struct cfiscsi_session *cs; 325 326 cs = PDU_SESSION(request); 327 328#ifdef ICL_KERNEL_PROXY 329 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 330 if (cs->cs_login_pdu == NULL) 331 cs->cs_login_pdu = request; 332 else 333 icl_pdu_free(request); 334 cv_signal(&cs->cs_login_cv); 335 return; 336 } 337#endif 338 339 cfiscsi_pdu_handle(request); 340} 341 342static void 343cfiscsi_error_callback(struct icl_conn *ic) 344{ 345 struct cfiscsi_session *cs; 346 347 cs = CONN_SESSION(ic); 348 349 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 350 cfiscsi_session_terminate(cs); 351} 352 353static int 354cfiscsi_pdu_prepare(struct icl_pdu *response) 355{ 356 struct cfiscsi_session *cs; 357 struct iscsi_bhs_scsi_response *bhssr; 358 bool advance_statsn = true; 359 360 cs = PDU_SESSION(response); 361 362 CFISCSI_SESSION_LOCK_ASSERT(cs); 363 364 /* 365 * We're only using fields common for all the response 366 * (target -> initiator) PDUs. 367 */ 368 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 369 370 /* 371 * 10.8.3: "The StatSN for this connection is not advanced 372 * after this PDU is sent." 373 */ 374 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 375 advance_statsn = false; 376 377 /* 378 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 379 * StatSN for the connection is not advanced after this PDU is sent." 380 */ 381 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 382 bhssr->bhssr_initiator_task_tag == 0xffffffff) 383 advance_statsn = false; 384 385 /* 386 * See the comment below - StatSN is not meaningful and must 387 * not be advanced. 388 */ 389 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 390 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 391 advance_statsn = false; 392 393 /* 394 * 10.7.3: "The fields StatSN, Status, and Residual Count 395 * only have meaningful content if the S bit is set to 1." 396 */ 397 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 398 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 399 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 400 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 401 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn - 1 + 402 imax(0, maxtags - cs->cs_outstanding_ctl_pdus)); 403 404 if (advance_statsn) 405 cs->cs_statsn++; 406 407 return (0); 408} 409 410static void 411cfiscsi_pdu_queue(struct icl_pdu *response) 412{ 413 struct cfiscsi_session *cs; 414 415 cs = PDU_SESSION(response); 416 417 CFISCSI_SESSION_LOCK(cs); 418 cfiscsi_pdu_prepare(response); 419 icl_pdu_queue(response); 420 CFISCSI_SESSION_UNLOCK(cs); 421} 422 423static void 424cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 425{ 426 struct cfiscsi_session *cs; 427 struct iscsi_bhs_nop_out *bhsno; 428 struct iscsi_bhs_nop_in *bhsni; 429 struct icl_pdu *response; 430 void *data = NULL; 431 size_t datasize; 432 int error; 433 434 cs = PDU_SESSION(request); 435 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 436 437 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 438 /* 439 * Nothing to do, iscsi_pdu_update_statsn() already 440 * zeroed the timeout. 441 */ 442 icl_pdu_free(request); 443 return; 444 } 445 446 datasize = icl_pdu_data_segment_length(request); 447 if (datasize > 0) { 448 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 449 if (data == NULL) { 450 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 451 "dropping connection"); 452 icl_pdu_free(request); 453 cfiscsi_session_terminate(cs); 454 return; 455 } 456 icl_pdu_get_data(request, 0, data, datasize); 457 } 458 459 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 460 if (response == NULL) { 461 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 462 "droppping connection"); 463 free(data, M_CFISCSI); 464 icl_pdu_free(request); 465 cfiscsi_session_terminate(cs); 466 return; 467 } 468 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 469 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 470 bhsni->bhsni_flags = 0x80; 471 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 472 bhsni->bhsni_target_transfer_tag = 0xffffffff; 473 if (datasize > 0) { 474 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 475 if (error != 0) { 476 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 477 "dropping connection"); 478 free(data, M_CFISCSI); 479 icl_pdu_free(request); 480 icl_pdu_free(response); 481 cfiscsi_session_terminate(cs); 482 return; 483 } 484 free(data, M_CFISCSI); 485 } 486 487 icl_pdu_free(request); 488 cfiscsi_pdu_queue(response); 489} 490 491static void 492cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 493{ 494 struct iscsi_bhs_scsi_command *bhssc; 495 struct cfiscsi_session *cs; 496 union ctl_io *io; 497 int error; 498 499 cs = PDU_SESSION(request); 500 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 501 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 502 // bhssc->bhssc_initiator_task_tag); 503 504 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 505 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 506 "ImmediateData=No; dropping connection"); 507 icl_pdu_free(request); 508 cfiscsi_session_terminate(cs); 509 return; 510 } 511 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 512 ctl_zero_io(io); 513 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 514 io->io_hdr.io_type = CTL_IO_SCSI; 515 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 516 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 517 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 518 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 519 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 520 case BHSSC_FLAGS_ATTR_UNTAGGED: 521 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 522 break; 523 case BHSSC_FLAGS_ATTR_SIMPLE: 524 io->scsiio.tag_type = CTL_TAG_SIMPLE; 525 break; 526 case BHSSC_FLAGS_ATTR_ORDERED: 527 io->scsiio.tag_type = CTL_TAG_ORDERED; 528 break; 529 case BHSSC_FLAGS_ATTR_HOQ: 530 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 531 break; 532 case BHSSC_FLAGS_ATTR_ACA: 533 io->scsiio.tag_type = CTL_TAG_ACA; 534 break; 535 default: 536 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 537 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 538 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 539 break; 540 } 541 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 542 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 543 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 544 error = ctl_queue(io); 545 if (error != CTL_RETVAL_COMPLETE) { 546 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 547 "dropping connection", error); 548 ctl_free_io(io); 549 refcount_release(&cs->cs_outstanding_ctl_pdus); 550 icl_pdu_free(request); 551 cfiscsi_session_terminate(cs); 552 } 553} 554 555static void 556cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 557{ 558 struct iscsi_bhs_task_management_request *bhstmr; 559 struct iscsi_bhs_task_management_response *bhstmr2; 560 struct icl_pdu *response; 561 struct cfiscsi_session *cs; 562 union ctl_io *io; 563 int error; 564 565 cs = PDU_SESSION(request); 566 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 567 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 568 ctl_zero_io(io); 569 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 570 io->io_hdr.io_type = CTL_IO_TASK; 571 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 572 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 573 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 574 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 575 576 switch (bhstmr->bhstmr_function & ~0x80) { 577 case BHSTMR_FUNCTION_ABORT_TASK: 578#if 0 579 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 580#endif 581 io->taskio.task_action = CTL_TASK_ABORT_TASK; 582 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 583 break; 584 case BHSTMR_FUNCTION_ABORT_TASK_SET: 585#if 0 586 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 587#endif 588 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 589 break; 590 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 591#if 0 592 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 593#endif 594 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 595 break; 596 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 597#if 0 598 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 599#endif 600 io->taskio.task_action = CTL_TASK_LUN_RESET; 601 break; 602 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 603#if 0 604 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 605#endif 606 io->taskio.task_action = CTL_TASK_TARGET_RESET; 607 break; 608 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 609#if 0 610 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 611#endif 612 io->taskio.task_action = CTL_TASK_TARGET_RESET; 613 break; 614 case BHSTMR_FUNCTION_QUERY_TASK: 615#if 0 616 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 617#endif 618 io->taskio.task_action = CTL_TASK_QUERY_TASK; 619 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 620 break; 621 case BHSTMR_FUNCTION_QUERY_TASK_SET: 622#if 0 623 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 624#endif 625 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 626 break; 627 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 628#if 0 629 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 630#endif 631 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 632 break; 633 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 634#if 0 635 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 636#endif 637 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 638 break; 639 default: 640 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 641 bhstmr->bhstmr_function & ~0x80); 642 ctl_free_io(io); 643 644 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 645 if (response == NULL) { 646 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 647 "dropping connection"); 648 icl_pdu_free(request); 649 cfiscsi_session_terminate(cs); 650 return; 651 } 652 bhstmr2 = (struct iscsi_bhs_task_management_response *) 653 response->ip_bhs; 654 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 655 bhstmr2->bhstmr_flags = 0x80; 656 bhstmr2->bhstmr_response = 657 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 658 bhstmr2->bhstmr_initiator_task_tag = 659 bhstmr->bhstmr_initiator_task_tag; 660 icl_pdu_free(request); 661 cfiscsi_pdu_queue(response); 662 return; 663 } 664 665 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 666 error = ctl_queue(io); 667 if (error != CTL_RETVAL_COMPLETE) { 668 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 669 "dropping connection", error); 670 ctl_free_io(io); 671 refcount_release(&cs->cs_outstanding_ctl_pdus); 672 icl_pdu_free(request); 673 cfiscsi_session_terminate(cs); 674 } 675} 676 677static bool 678cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 679{ 680 struct iscsi_bhs_data_out *bhsdo; 681 struct cfiscsi_session *cs; 682 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 683 size_t copy_len, len, off, buffer_offset; 684 int ctl_sg_count; 685 union ctl_io *io; 686 687 cs = PDU_SESSION(request); 688 689 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 690 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 691 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 692 ISCSI_BHS_OPCODE_SCSI_COMMAND, 693 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 694 695 /* 696 * We're only using fields common for Data-Out and SCSI Command PDUs. 697 */ 698 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 699 700 io = cdw->cdw_ctl_io; 701 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 702 ("CTL_FLAG_DATA_IN")); 703 704#if 0 705 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 706 request->ip_data_len, io->scsiio.kern_total_len); 707#endif 708 709 if (io->scsiio.kern_sg_entries > 0) { 710 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 711 ctl_sg_count = io->scsiio.kern_sg_entries; 712 } else { 713 ctl_sglist = &ctl_sg_entry; 714 ctl_sglist->addr = io->scsiio.kern_data_ptr; 715 ctl_sglist->len = io->scsiio.kern_data_len; 716 ctl_sg_count = 1; 717 } 718 719 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 720 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 721 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 722 else 723 buffer_offset = 0; 724 len = icl_pdu_data_segment_length(request); 725 726 /* 727 * Make sure the offset, as sent by the initiator, matches the offset 728 * we're supposed to be at in the scatter-gather list. 729 */ 730 if (buffer_offset > 731 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 732 buffer_offset + len <= 733 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 734 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 735 "expected %zd; dropping connection", buffer_offset, 736 (size_t)io->scsiio.kern_rel_offset + 737 (size_t)io->scsiio.ext_data_filled); 738 ctl_set_data_phase_error(&io->scsiio); 739 cfiscsi_session_terminate(cs); 740 return (true); 741 } 742 743 /* 744 * This is the offset within the PDU data segment, as opposed 745 * to buffer_offset, which is the offset within the task (SCSI 746 * command). 747 */ 748 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 749 buffer_offset; 750 751 /* 752 * Iterate over the scatter/gather segments, filling them with data 753 * from the PDU data segment. Note that this can get called multiple 754 * times for one SCSI command; the cdw structure holds state for the 755 * scatter/gather list. 756 */ 757 for (;;) { 758 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 759 ("cdw->cdw_sg_index >= ctl_sg_count")); 760 if (cdw->cdw_sg_len == 0) { 761 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 762 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 763 } 764 KASSERT(off <= len, ("len > off")); 765 copy_len = len - off; 766 if (copy_len > cdw->cdw_sg_len) 767 copy_len = cdw->cdw_sg_len; 768 769 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 770 cdw->cdw_sg_addr += copy_len; 771 cdw->cdw_sg_len -= copy_len; 772 off += copy_len; 773 io->scsiio.ext_data_filled += copy_len; 774 io->scsiio.kern_data_resid -= copy_len; 775 776 if (cdw->cdw_sg_len == 0) { 777 /* 778 * End of current segment. 779 */ 780 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 781 /* 782 * Last segment in scatter/gather list. 783 */ 784 break; 785 } 786 cdw->cdw_sg_index++; 787 } 788 789 if (off == len) { 790 /* 791 * End of PDU payload. 792 */ 793 break; 794 } 795 } 796 797 if (len > off) { 798 /* 799 * In case of unsolicited data, it's possible that the buffer 800 * provided by CTL is smaller than negotiated FirstBurstLength. 801 * Just ignore the superfluous data; will ask for them with R2T 802 * on next call to cfiscsi_datamove(). 803 * 804 * This obviously can only happen with SCSI Command PDU. 805 */ 806 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 807 ISCSI_BHS_OPCODE_SCSI_COMMAND) 808 return (true); 809 810 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 811 "expected %zd; dropping connection", 812 icl_pdu_data_segment_length(request), off); 813 ctl_set_data_phase_error(&io->scsiio); 814 cfiscsi_session_terminate(cs); 815 return (true); 816 } 817 818 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 819 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 820 CFISCSI_SESSION_WARN(cs, "got the final packet without " 821 "the F flag; flags = 0x%x; dropping connection", 822 bhsdo->bhsdo_flags); 823 ctl_set_data_phase_error(&io->scsiio); 824 cfiscsi_session_terminate(cs); 825 return (true); 826 } 827 828 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 829 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 830 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 831 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 832 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 833 "transmitted size was %zd bytes instead of %d; " 834 "dropping connection", 835 (size_t)io->scsiio.ext_data_filled, 836 cdw->cdw_r2t_end); 837 ctl_set_data_phase_error(&io->scsiio); 838 cfiscsi_session_terminate(cs); 839 return (true); 840 } else { 841 /* 842 * For SCSI Command PDU, this just means we need to 843 * solicit more data by sending R2T. 844 */ 845 return (false); 846 } 847 } 848 849 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 850#if 0 851 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 852 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 853#endif 854 855 return (true); 856 } 857 858 return (false); 859} 860 861static void 862cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 863{ 864 struct iscsi_bhs_data_out *bhsdo; 865 struct cfiscsi_session *cs; 866 struct cfiscsi_data_wait *cdw = NULL; 867 union ctl_io *io; 868 bool done; 869 870 cs = PDU_SESSION(request); 871 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 872 873 CFISCSI_SESSION_LOCK(cs); 874 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 875#if 0 876 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 877 "ttt 0x%x, itt 0x%x", 878 bhsdo->bhsdo_target_transfer_tag, 879 bhsdo->bhsdo_initiator_task_tag, 880 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 881#endif 882 if (bhsdo->bhsdo_target_transfer_tag == 883 cdw->cdw_target_transfer_tag) 884 break; 885 } 886 CFISCSI_SESSION_UNLOCK(cs); 887 if (cdw == NULL) { 888 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 889 "0x%x, not found; dropping connection", 890 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 891 icl_pdu_free(request); 892 cfiscsi_session_terminate(cs); 893 return; 894 } 895 896 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 897 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 898 "DataSN %u, while expected %u; dropping connection", 899 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 900 icl_pdu_free(request); 901 cfiscsi_session_terminate(cs); 902 return; 903 } 904 cdw->cdw_datasn++; 905 906 io = cdw->cdw_ctl_io; 907 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 908 ("CTL_FLAG_DATA_IN")); 909 910 done = cfiscsi_handle_data_segment(request, cdw); 911 if (done) { 912 CFISCSI_SESSION_LOCK(cs); 913 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 914 CFISCSI_SESSION_UNLOCK(cs); 915 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 916 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 917 cfiscsi_data_wait_free(cs, cdw); 918 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 919 if (done) 920 io->scsiio.be_move_done(io); 921 else 922 cfiscsi_datamove_out(io); 923 } 924 925 icl_pdu_free(request); 926} 927 928static void 929cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 930{ 931 struct iscsi_bhs_logout_request *bhslr; 932 struct iscsi_bhs_logout_response *bhslr2; 933 struct icl_pdu *response; 934 struct cfiscsi_session *cs; 935 936 cs = PDU_SESSION(request); 937 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 938 switch (bhslr->bhslr_reason & 0x7f) { 939 case BHSLR_REASON_CLOSE_SESSION: 940 case BHSLR_REASON_CLOSE_CONNECTION: 941 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 942 if (response == NULL) { 943 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 944 icl_pdu_free(request); 945 cfiscsi_session_terminate(cs); 946 return; 947 } 948 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 949 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 950 bhslr2->bhslr_flags = 0x80; 951 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 952 bhslr2->bhslr_initiator_task_tag = 953 bhslr->bhslr_initiator_task_tag; 954 icl_pdu_free(request); 955 cfiscsi_pdu_queue(response); 956 cfiscsi_session_terminate(cs); 957 break; 958 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 959 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 960 if (response == NULL) { 961 CFISCSI_SESSION_WARN(cs, 962 "failed to allocate memory; dropping connection"); 963 icl_pdu_free(request); 964 cfiscsi_session_terminate(cs); 965 return; 966 } 967 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 968 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 969 bhslr2->bhslr_flags = 0x80; 970 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 971 bhslr2->bhslr_initiator_task_tag = 972 bhslr->bhslr_initiator_task_tag; 973 icl_pdu_free(request); 974 cfiscsi_pdu_queue(response); 975 break; 976 default: 977 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 978 bhslr->bhslr_reason); 979 icl_pdu_free(request); 980 cfiscsi_session_terminate(cs); 981 break; 982 } 983} 984 985static void 986cfiscsi_callout(void *context) 987{ 988 struct icl_pdu *cp; 989 struct iscsi_bhs_nop_in *bhsni; 990 struct cfiscsi_session *cs; 991 992 cs = context; 993 994 if (cs->cs_terminating) 995 return; 996 997 callout_schedule(&cs->cs_callout, 1 * hz); 998 999 atomic_add_int(&cs->cs_timeout, 1); 1000 1001#ifdef ICL_KERNEL_PROXY 1002 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1003 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1004 CFISCSI_SESSION_WARN(cs, "login timed out after " 1005 "%d seconds; dropping connection", cs->cs_timeout); 1006 cfiscsi_session_terminate(cs); 1007 } 1008 return; 1009 } 1010#endif 1011 1012 if (ping_timeout <= 0) { 1013 /* 1014 * Pings are disabled. Don't send NOP-In in this case; 1015 * user might have disabled pings to work around problems 1016 * with certain initiators that can't properly handle 1017 * NOP-In, such as iPXE. Reset the timeout, to avoid 1018 * triggering reconnection, should the user decide to 1019 * reenable them. 1020 */ 1021 cs->cs_timeout = 0; 1022 return; 1023 } 1024 1025 if (cs->cs_timeout >= ping_timeout) { 1026 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1027 "dropping connection", ping_timeout); 1028 cfiscsi_session_terminate(cs); 1029 return; 1030 } 1031 1032 /* 1033 * If the ping was reset less than one second ago - which means 1034 * that we've received some PDU during the last second - assume 1035 * the traffic flows correctly and don't bother sending a NOP-Out. 1036 * 1037 * (It's 2 - one for one second, and one for incrementing is_timeout 1038 * earlier in this routine.) 1039 */ 1040 if (cs->cs_timeout < 2) 1041 return; 1042 1043 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1044 if (cp == NULL) { 1045 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1046 return; 1047 } 1048 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1049 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1050 bhsni->bhsni_flags = 0x80; 1051 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1052 1053 cfiscsi_pdu_queue(cp); 1054} 1055 1056static struct cfiscsi_data_wait * 1057cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1058 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1059{ 1060 struct cfiscsi_data_wait *cdw; 1061 int error; 1062 1063 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1064 if (cdw == NULL) { 1065 CFISCSI_SESSION_WARN(cs, 1066 "failed to allocate %zd bytes", sizeof(*cdw)); 1067 return (NULL); 1068 } 1069 1070 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1071 &cdw->cdw_icl_prv); 1072 if (error != 0) { 1073 CFISCSI_SESSION_WARN(cs, 1074 "icl_conn_transfer_setup() failed with error %d", error); 1075 uma_zfree(cfiscsi_data_wait_zone, cdw); 1076 return (NULL); 1077 } 1078 1079 cdw->cdw_ctl_io = io; 1080 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1081 cdw->cdw_initiator_task_tag = initiator_task_tag; 1082 1083 return (cdw); 1084} 1085 1086static void 1087cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1088 struct cfiscsi_data_wait *cdw) 1089{ 1090 1091 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1092 uma_zfree(cfiscsi_data_wait_zone, cdw); 1093} 1094 1095static void 1096cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1097{ 1098 struct cfiscsi_data_wait *cdw; 1099 union ctl_io *io; 1100 int error, last, wait; 1101 1102 if (cs->cs_target == NULL) 1103 return; /* No target yet, so nothing to do. */ 1104 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1105 ctl_zero_io(io); 1106 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1107 io->io_hdr.io_type = CTL_IO_TASK; 1108 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1109 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1110 io->io_hdr.nexus.targ_lun = 0; 1111 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1112 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1113 wait = cs->cs_outstanding_ctl_pdus; 1114 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1115 error = ctl_queue(io); 1116 if (error != CTL_RETVAL_COMPLETE) { 1117 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1118 refcount_release(&cs->cs_outstanding_ctl_pdus); 1119 ctl_free_io(io); 1120 } 1121 1122 CFISCSI_SESSION_LOCK(cs); 1123 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1124 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1125 CFISCSI_SESSION_UNLOCK(cs); 1126 /* 1127 * Set nonzero port status; this prevents backends from 1128 * assuming that the data transfer actually succeeded 1129 * and writing uninitialized data to disk. 1130 */ 1131 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1132 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1133 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1134 cfiscsi_data_wait_free(cs, cdw); 1135 CFISCSI_SESSION_LOCK(cs); 1136 } 1137 CFISCSI_SESSION_UNLOCK(cs); 1138 1139 /* 1140 * Wait for CTL to terminate all the tasks. 1141 */ 1142 if (wait > 0) 1143 CFISCSI_SESSION_WARN(cs, 1144 "waiting for CTL to terminate %d tasks", wait); 1145 for (;;) { 1146 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1147 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1148 if (last != 0) 1149 break; 1150 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1151 0, "cfiscsi_terminate", hz / 100); 1152 } 1153 if (wait > 0) 1154 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1155} 1156 1157static void 1158cfiscsi_maintenance_thread(void *arg) 1159{ 1160 struct cfiscsi_session *cs; 1161 1162 cs = arg; 1163 1164 for (;;) { 1165 CFISCSI_SESSION_LOCK(cs); 1166 if (cs->cs_terminating == false) 1167 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1168 CFISCSI_SESSION_UNLOCK(cs); 1169 1170 if (cs->cs_terminating) { 1171 1172 /* 1173 * We used to wait up to 30 seconds to deliver queued 1174 * PDUs to the initiator. We also tried hard to deliver 1175 * SCSI Responses for the aborted PDUs. We don't do 1176 * that anymore. We might need to revisit that. 1177 */ 1178 callout_drain(&cs->cs_callout); 1179 icl_conn_close(cs->cs_conn); 1180 1181 /* 1182 * At this point ICL receive thread is no longer 1183 * running; no new tasks can be queued. 1184 */ 1185 cfiscsi_session_terminate_tasks(cs); 1186 cfiscsi_session_delete(cs); 1187 kthread_exit(); 1188 return; 1189 } 1190 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1191 } 1192} 1193 1194static void 1195cfiscsi_session_terminate(struct cfiscsi_session *cs) 1196{ 1197 1198 if (cs->cs_terminating) 1199 return; 1200 cs->cs_terminating = true; 1201 cv_signal(&cs->cs_maintenance_cv); 1202#ifdef ICL_KERNEL_PROXY 1203 cv_signal(&cs->cs_login_cv); 1204#endif 1205} 1206 1207static int 1208cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1209{ 1210 struct cfiscsi_target *ct; 1211 char *name; 1212 int i; 1213 1214 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1215 1216 ct = cs->cs_target; 1217 name = strdup(cs->cs_initiator_id, M_CTL); 1218 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1219 if (i < 0) { 1220 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1221 i); 1222 cs->cs_ctl_initid = -1; 1223 return (1); 1224 } 1225 cs->cs_ctl_initid = i; 1226#if 0 1227 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1228#endif 1229 1230 return (0); 1231} 1232 1233static void 1234cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1235{ 1236 int error; 1237 1238 if (cs->cs_ctl_initid == -1) 1239 return; 1240 1241 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1242 if (error != 0) { 1243 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1244 error); 1245 } 1246 cs->cs_ctl_initid = -1; 1247} 1248 1249static struct cfiscsi_session * 1250cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1251{ 1252 struct cfiscsi_session *cs; 1253 int error; 1254 1255 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1256 if (cs == NULL) { 1257 CFISCSI_WARN("malloc failed"); 1258 return (NULL); 1259 } 1260 cs->cs_ctl_initid = -1; 1261 1262 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1263 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1264 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1265 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1266#ifdef ICL_KERNEL_PROXY 1267 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1268#endif 1269 1270 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); 1271 if (cs->cs_conn == NULL) { 1272 free(cs, M_CFISCSI); 1273 return (NULL); 1274 } 1275 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1276 cs->cs_conn->ic_error = cfiscsi_error_callback; 1277 cs->cs_conn->ic_prv0 = cs; 1278 1279 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1280 if (error != 0) { 1281 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1282 free(cs, M_CFISCSI); 1283 return (NULL); 1284 } 1285 1286 mtx_lock(&softc->lock); 1287 cs->cs_id = ++softc->last_session_id; 1288 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1289 mtx_unlock(&softc->lock); 1290 1291 /* 1292 * Start pinging the initiator. 1293 */ 1294 callout_init(&cs->cs_callout, 1); 1295 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1296 1297 return (cs); 1298} 1299 1300static void 1301cfiscsi_session_delete(struct cfiscsi_session *cs) 1302{ 1303 struct cfiscsi_softc *softc; 1304 1305 softc = &cfiscsi_softc; 1306 1307 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1308 ("destroying session with outstanding CTL pdus")); 1309 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1310 ("destroying session with non-empty queue")); 1311 1312 cfiscsi_session_unregister_initiator(cs); 1313 if (cs->cs_target != NULL) 1314 cfiscsi_target_release(cs->cs_target); 1315 icl_conn_close(cs->cs_conn); 1316 icl_conn_free(cs->cs_conn); 1317 1318 mtx_lock(&softc->lock); 1319 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1320 cv_signal(&softc->sessions_cv); 1321 mtx_unlock(&softc->lock); 1322 1323 free(cs, M_CFISCSI); 1324} 1325 1326static int 1327cfiscsi_init(void) 1328{ 1329 struct cfiscsi_softc *softc; 1330 1331 softc = &cfiscsi_softc; 1332 bzero(softc, sizeof(*softc)); 1333 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1334 1335 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1336#ifdef ICL_KERNEL_PROXY 1337 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1338#endif 1339 TAILQ_INIT(&softc->sessions); 1340 TAILQ_INIT(&softc->targets); 1341 1342 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1343 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1344 UMA_ALIGN_PTR, 0); 1345 1346 return (0); 1347} 1348 1349static int 1350cfiscsi_shutdown(void) 1351{ 1352 struct cfiscsi_softc *softc = &cfiscsi_softc; 1353 1354 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) 1355 return (EBUSY); 1356 1357 uma_zdestroy(cfiscsi_data_wait_zone); 1358#ifdef ICL_KERNEL_PROXY 1359 cv_destroy(&softc->accept_cv); 1360#endif 1361 cv_destroy(&softc->sessions_cv); 1362 mtx_destroy(&softc->lock); 1363 return (0); 1364} 1365 1366#ifdef ICL_KERNEL_PROXY 1367static void 1368cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1369{ 1370 struct cfiscsi_session *cs; 1371 1372 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1373 if (cs == NULL) { 1374 CFISCSI_WARN("failed to create session"); 1375 return; 1376 } 1377 1378 icl_conn_handoff_sock(cs->cs_conn, so); 1379 cs->cs_initiator_sa = sa; 1380 cs->cs_portal_id = portal_id; 1381 cs->cs_waiting_for_ctld = true; 1382 cv_signal(&cfiscsi_softc.accept_cv); 1383} 1384#endif 1385 1386static void 1387cfiscsi_online(void *arg) 1388{ 1389 struct cfiscsi_softc *softc; 1390 struct cfiscsi_target *ct; 1391 int online; 1392 1393 ct = (struct cfiscsi_target *)arg; 1394 softc = ct->ct_softc; 1395 1396 mtx_lock(&softc->lock); 1397 if (ct->ct_online) { 1398 mtx_unlock(&softc->lock); 1399 return; 1400 } 1401 ct->ct_online = 1; 1402 online = softc->online++; 1403 mtx_unlock(&softc->lock); 1404 if (online > 0) 1405 return; 1406 1407#ifdef ICL_KERNEL_PROXY 1408 if (softc->listener != NULL) 1409 icl_listen_free(softc->listener); 1410 softc->listener = icl_listen_new(cfiscsi_accept); 1411#endif 1412} 1413 1414static void 1415cfiscsi_offline(void *arg) 1416{ 1417 struct cfiscsi_softc *softc; 1418 struct cfiscsi_target *ct; 1419 struct cfiscsi_session *cs; 1420 int online; 1421 1422 ct = (struct cfiscsi_target *)arg; 1423 softc = ct->ct_softc; 1424 1425 mtx_lock(&softc->lock); 1426 if (!ct->ct_online) { 1427 mtx_unlock(&softc->lock); 1428 return; 1429 } 1430 ct->ct_online = 0; 1431 online = --softc->online; 1432 1433 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1434 if (cs->cs_target == ct) 1435 cfiscsi_session_terminate(cs); 1436 } 1437 do { 1438 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1439 if (cs->cs_target == ct) 1440 break; 1441 } 1442 if (cs != NULL) 1443 cv_wait(&softc->sessions_cv, &softc->lock); 1444 } while (cs != NULL && ct->ct_online == 0); 1445 mtx_unlock(&softc->lock); 1446 if (online > 0) 1447 return; 1448 1449#ifdef ICL_KERNEL_PROXY 1450 icl_listen_free(softc->listener); 1451 softc->listener = NULL; 1452#endif 1453} 1454 1455static int 1456cfiscsi_info(void *arg, struct sbuf *sb) 1457{ 1458 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1459 int retval; 1460 1461 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1462 ct->ct_state); 1463 return (retval); 1464} 1465 1466static void 1467cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1468{ 1469 struct cfiscsi_softc *softc; 1470 struct cfiscsi_session *cs, *cs2; 1471 struct cfiscsi_target *ct; 1472 struct ctl_iscsi_handoff_params *cihp; 1473 int error; 1474 1475 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1476 softc = &cfiscsi_softc; 1477 1478 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1479 cihp->initiator_name, cihp->initiator_addr, 1480 cihp->target_name); 1481 1482 ct = cfiscsi_target_find(softc, cihp->target_name, 1483 cihp->portal_group_tag); 1484 if (ct == NULL) { 1485 ci->status = CTL_ISCSI_ERROR; 1486 snprintf(ci->error_str, sizeof(ci->error_str), 1487 "%s: target not found", __func__); 1488 return; 1489 } 1490 1491#ifdef ICL_KERNEL_PROXY 1492 if (cihp->socket > 0 && cihp->connection_id > 0) { 1493 snprintf(ci->error_str, sizeof(ci->error_str), 1494 "both socket and connection_id set"); 1495 ci->status = CTL_ISCSI_ERROR; 1496 cfiscsi_target_release(ct); 1497 return; 1498 } 1499 if (cihp->socket == 0) { 1500 mtx_lock(&cfiscsi_softc.lock); 1501 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1502 if (cs->cs_id == cihp->connection_id) 1503 break; 1504 } 1505 if (cs == NULL) { 1506 mtx_unlock(&cfiscsi_softc.lock); 1507 snprintf(ci->error_str, sizeof(ci->error_str), 1508 "connection not found"); 1509 ci->status = CTL_ISCSI_ERROR; 1510 cfiscsi_target_release(ct); 1511 return; 1512 } 1513 mtx_unlock(&cfiscsi_softc.lock); 1514 } else { 1515#endif 1516 cs = cfiscsi_session_new(softc, cihp->offload); 1517 if (cs == NULL) { 1518 ci->status = CTL_ISCSI_ERROR; 1519 snprintf(ci->error_str, sizeof(ci->error_str), 1520 "%s: cfiscsi_session_new failed", __func__); 1521 cfiscsi_target_release(ct); 1522 return; 1523 } 1524#ifdef ICL_KERNEL_PROXY 1525 } 1526#endif 1527 1528 /* 1529 * First PDU of Full Feature phase has the same CmdSN as the last 1530 * PDU from the Login Phase received from the initiator. Thus, 1531 * the -1 below. 1532 */ 1533 cs->cs_cmdsn = cihp->cmdsn; 1534 cs->cs_statsn = cihp->statsn; 1535 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1536 cs->cs_max_burst_length = cihp->max_burst_length; 1537 cs->cs_first_burst_length = cihp->first_burst_length; 1538 cs->cs_immediate_data = !!cihp->immediate_data; 1539 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1540 cs->cs_conn->ic_header_crc32c = true; 1541 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1542 cs->cs_conn->ic_data_crc32c = true; 1543 1544 strlcpy(cs->cs_initiator_name, 1545 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1546 strlcpy(cs->cs_initiator_addr, 1547 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1548 strlcpy(cs->cs_initiator_alias, 1549 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1550 memcpy(cs->cs_initiator_isid, 1551 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1552 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1553 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1554 cihp->initiator_isid[0], cihp->initiator_isid[1], 1555 cihp->initiator_isid[2], cihp->initiator_isid[3], 1556 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1557 1558 mtx_lock(&softc->lock); 1559 if (ct->ct_online == 0) { 1560 mtx_unlock(&softc->lock); 1561 cfiscsi_session_terminate(cs); 1562 cfiscsi_target_release(ct); 1563 ci->status = CTL_ISCSI_ERROR; 1564 snprintf(ci->error_str, sizeof(ci->error_str), 1565 "%s: port offline", __func__); 1566 return; 1567 } 1568 cs->cs_target = ct; 1569 mtx_unlock(&softc->lock); 1570 1571 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1572restart: 1573 if (!cs->cs_terminating) { 1574 mtx_lock(&softc->lock); 1575 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1576 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1577 cs->cs_target == cs2->cs_target && 1578 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1579 if (strcmp(cs->cs_initiator_addr, 1580 cs2->cs_initiator_addr) != 0) { 1581 CFISCSI_SESSION_WARN(cs2, 1582 "session reinstatement from " 1583 "different address %s", 1584 cs->cs_initiator_addr); 1585 } else { 1586 CFISCSI_SESSION_DEBUG(cs2, 1587 "session reinstatement"); 1588 } 1589 cfiscsi_session_terminate(cs2); 1590 mtx_unlock(&softc->lock); 1591 pause("cfiscsi_reinstate", 1); 1592 goto restart; 1593 } 1594 } 1595 mtx_unlock(&softc->lock); 1596 } 1597 1598 /* 1599 * Register initiator with CTL. 1600 */ 1601 cfiscsi_session_register_initiator(cs); 1602 1603#ifdef ICL_KERNEL_PROXY 1604 if (cihp->socket > 0) { 1605#endif 1606 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1607 if (error != 0) { 1608 cfiscsi_session_terminate(cs); 1609 refcount_release(&cs->cs_outstanding_ctl_pdus); 1610 ci->status = CTL_ISCSI_ERROR; 1611 snprintf(ci->error_str, sizeof(ci->error_str), 1612 "%s: icl_conn_handoff failed with error %d", 1613 __func__, error); 1614 return; 1615 } 1616#ifdef ICL_KERNEL_PROXY 1617 } 1618#endif 1619 1620#ifdef ICL_KERNEL_PROXY 1621 cs->cs_login_phase = false; 1622 1623 /* 1624 * First PDU of the Full Feature phase has likely already arrived. 1625 * We have to pick it up and execute properly. 1626 */ 1627 if (cs->cs_login_pdu != NULL) { 1628 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1629 cfiscsi_pdu_handle(cs->cs_login_pdu); 1630 cs->cs_login_pdu = NULL; 1631 } 1632#endif 1633 1634 refcount_release(&cs->cs_outstanding_ctl_pdus); 1635 ci->status = CTL_ISCSI_OK; 1636} 1637 1638static void 1639cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1640{ 1641 struct ctl_iscsi_list_params *cilp; 1642 struct cfiscsi_session *cs; 1643 struct cfiscsi_softc *softc; 1644 struct sbuf *sb; 1645 int error; 1646 1647 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1648 softc = &cfiscsi_softc; 1649 1650 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1651 if (sb == NULL) { 1652 ci->status = CTL_ISCSI_ERROR; 1653 snprintf(ci->error_str, sizeof(ci->error_str), 1654 "Unable to allocate %d bytes for iSCSI session list", 1655 cilp->alloc_len); 1656 return; 1657 } 1658 1659 sbuf_printf(sb, "<ctlislist>\n"); 1660 mtx_lock(&softc->lock); 1661 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1662#ifdef ICL_KERNEL_PROXY 1663 if (cs->cs_target == NULL) 1664 continue; 1665#endif 1666 error = sbuf_printf(sb, "<connection id=\"%d\">" 1667 "<initiator>%s</initiator>" 1668 "<initiator_addr>%s</initiator_addr>" 1669 "<initiator_alias>%s</initiator_alias>" 1670 "<target>%s</target>" 1671 "<target_alias>%s</target_alias>" 1672 "<target_portal_group_tag>%u</target_portal_group_tag>" 1673 "<header_digest>%s</header_digest>" 1674 "<data_digest>%s</data_digest>" 1675 "<max_data_segment_length>%zd</max_data_segment_length>" 1676 "<max_burst_length>%zd</max_burst_length>" 1677 "<first_burst_length>%zd</first_burst_length>" 1678 "<immediate_data>%d</immediate_data>" 1679 "<iser>%d</iser>" 1680 "<offload>%s</offload>" 1681 "</connection>\n", 1682 cs->cs_id, 1683 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1684 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1685 cs->cs_target->ct_tag, 1686 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1687 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1688 cs->cs_max_data_segment_length, 1689 cs->cs_max_burst_length, 1690 cs->cs_first_burst_length, 1691 cs->cs_immediate_data, 1692 cs->cs_conn->ic_iser, 1693 cs->cs_conn->ic_offload); 1694 if (error != 0) 1695 break; 1696 } 1697 mtx_unlock(&softc->lock); 1698 error = sbuf_printf(sb, "</ctlislist>\n"); 1699 if (error != 0) { 1700 sbuf_delete(sb); 1701 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1702 snprintf(ci->error_str, sizeof(ci->error_str), 1703 "Out of space, %d bytes is too small", cilp->alloc_len); 1704 return; 1705 } 1706 sbuf_finish(sb); 1707 1708 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1709 cilp->fill_len = sbuf_len(sb) + 1; 1710 ci->status = CTL_ISCSI_OK; 1711 sbuf_delete(sb); 1712} 1713 1714static void 1715cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1716{ 1717 struct icl_pdu *response; 1718 struct iscsi_bhs_asynchronous_message *bhsam; 1719 struct ctl_iscsi_logout_params *cilp; 1720 struct cfiscsi_session *cs; 1721 struct cfiscsi_softc *softc; 1722 int found = 0; 1723 1724 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1725 softc = &cfiscsi_softc; 1726 1727 mtx_lock(&softc->lock); 1728 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1729 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1730 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1731 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1732 continue; 1733 1734 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1735 if (response == NULL) { 1736 ci->status = CTL_ISCSI_ERROR; 1737 snprintf(ci->error_str, sizeof(ci->error_str), 1738 "Unable to allocate memory"); 1739 mtx_unlock(&softc->lock); 1740 return; 1741 } 1742 bhsam = 1743 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1744 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1745 bhsam->bhsam_flags = 0x80; 1746 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1747 bhsam->bhsam_parameter3 = htons(10); 1748 cfiscsi_pdu_queue(response); 1749 found++; 1750 } 1751 mtx_unlock(&softc->lock); 1752 1753 if (found == 0) { 1754 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1755 snprintf(ci->error_str, sizeof(ci->error_str), 1756 "No matching connections found"); 1757 return; 1758 } 1759 1760 ci->status = CTL_ISCSI_OK; 1761} 1762 1763static void 1764cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1765{ 1766 struct icl_pdu *response; 1767 struct iscsi_bhs_asynchronous_message *bhsam; 1768 struct ctl_iscsi_terminate_params *citp; 1769 struct cfiscsi_session *cs; 1770 struct cfiscsi_softc *softc; 1771 int found = 0; 1772 1773 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1774 softc = &cfiscsi_softc; 1775 1776 mtx_lock(&softc->lock); 1777 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1778 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1779 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1780 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1781 continue; 1782 1783 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1784 if (response == NULL) { 1785 /* 1786 * Oh well. Just terminate the connection. 1787 */ 1788 } else { 1789 bhsam = (struct iscsi_bhs_asynchronous_message *) 1790 response->ip_bhs; 1791 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1792 bhsam->bhsam_flags = 0x80; 1793 bhsam->bhsam_0xffffffff = 0xffffffff; 1794 bhsam->bhsam_async_event = 1795 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1796 cfiscsi_pdu_queue(response); 1797 } 1798 cfiscsi_session_terminate(cs); 1799 found++; 1800 } 1801 mtx_unlock(&softc->lock); 1802 1803 if (found == 0) { 1804 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1805 snprintf(ci->error_str, sizeof(ci->error_str), 1806 "No matching connections found"); 1807 return; 1808 } 1809 1810 ci->status = CTL_ISCSI_OK; 1811} 1812 1813static void 1814cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1815{ 1816 struct ctl_iscsi_limits_params *cilp; 1817 int error; 1818 1819 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1820 1821 error = icl_limits(cilp->offload, false, 1822 &cilp->data_segment_limit); 1823 if (error != 0) { 1824 ci->status = CTL_ISCSI_ERROR; 1825 snprintf(ci->error_str, sizeof(ci->error_str), 1826 "%s: icl_limits failed with error %d", 1827 __func__, error); 1828 return; 1829 } 1830 1831 ci->status = CTL_ISCSI_OK; 1832} 1833 1834#ifdef ICL_KERNEL_PROXY 1835static void 1836cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1837{ 1838 struct ctl_iscsi_listen_params *cilp; 1839 struct sockaddr *sa; 1840 int error; 1841 1842 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1843 1844 if (cfiscsi_softc.listener == NULL) { 1845 CFISCSI_DEBUG("no listener"); 1846 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1847 ci->status = CTL_ISCSI_ERROR; 1848 return; 1849 } 1850 1851 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1852 if (error != 0) { 1853 CFISCSI_DEBUG("getsockaddr, error %d", error); 1854 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1855 ci->status = CTL_ISCSI_ERROR; 1856 return; 1857 } 1858 1859 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1860 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1861 if (error != 0) { 1862 free(sa, M_SONAME); 1863 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1864 snprintf(ci->error_str, sizeof(ci->error_str), 1865 "icl_listen_add failed, error %d", error); 1866 ci->status = CTL_ISCSI_ERROR; 1867 return; 1868 } 1869 1870 ci->status = CTL_ISCSI_OK; 1871} 1872 1873static void 1874cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1875{ 1876 struct ctl_iscsi_accept_params *ciap; 1877 struct cfiscsi_session *cs; 1878 int error; 1879 1880 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1881 1882 mtx_lock(&cfiscsi_softc.lock); 1883 for (;;) { 1884 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1885 if (cs->cs_waiting_for_ctld) 1886 break; 1887 } 1888 if (cs != NULL) 1889 break; 1890 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1891 if (error != 0) { 1892 mtx_unlock(&cfiscsi_softc.lock); 1893 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1894 ci->status = CTL_ISCSI_ERROR; 1895 return; 1896 } 1897 } 1898 mtx_unlock(&cfiscsi_softc.lock); 1899 1900 cs->cs_waiting_for_ctld = false; 1901 cs->cs_login_phase = true; 1902 1903 ciap->connection_id = cs->cs_id; 1904 ciap->portal_id = cs->cs_portal_id; 1905 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1906 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1907 cs->cs_initiator_sa->sa_len); 1908 if (error != 0) { 1909 snprintf(ci->error_str, sizeof(ci->error_str), 1910 "copyout failed with error %d", error); 1911 ci->status = CTL_ISCSI_ERROR; 1912 return; 1913 } 1914 1915 ci->status = CTL_ISCSI_OK; 1916} 1917 1918static void 1919cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1920{ 1921 struct ctl_iscsi_send_params *cisp; 1922 struct cfiscsi_session *cs; 1923 struct icl_pdu *ip; 1924 size_t datalen; 1925 void *data; 1926 int error; 1927 1928 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1929 1930 mtx_lock(&cfiscsi_softc.lock); 1931 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1932 if (cs->cs_id == cisp->connection_id) 1933 break; 1934 } 1935 if (cs == NULL) { 1936 mtx_unlock(&cfiscsi_softc.lock); 1937 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1938 ci->status = CTL_ISCSI_ERROR; 1939 return; 1940 } 1941 mtx_unlock(&cfiscsi_softc.lock); 1942 1943#if 0 1944 if (cs->cs_login_phase == false) 1945 return (EBUSY); 1946#endif 1947 1948 if (cs->cs_terminating) { 1949 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1950 ci->status = CTL_ISCSI_ERROR; 1951 return; 1952 } 1953 1954 datalen = cisp->data_segment_len; 1955 /* 1956 * XXX 1957 */ 1958 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1959 if (datalen > 65535) { 1960 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1961 ci->status = CTL_ISCSI_ERROR; 1962 return; 1963 } 1964 if (datalen > 0) { 1965 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1966 error = copyin(cisp->data_segment, data, datalen); 1967 if (error != 0) { 1968 free(data, M_CFISCSI); 1969 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1970 ci->status = CTL_ISCSI_ERROR; 1971 return; 1972 } 1973 } 1974 1975 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1976 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1977 if (datalen > 0) { 1978 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1979 free(data, M_CFISCSI); 1980 } 1981 CFISCSI_SESSION_LOCK(cs); 1982 icl_pdu_queue(ip); 1983 CFISCSI_SESSION_UNLOCK(cs); 1984 ci->status = CTL_ISCSI_OK; 1985} 1986 1987static void 1988cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1989{ 1990 struct ctl_iscsi_receive_params *cirp; 1991 struct cfiscsi_session *cs; 1992 struct icl_pdu *ip; 1993 void *data; 1994 int error; 1995 1996 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1997 1998 mtx_lock(&cfiscsi_softc.lock); 1999 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2000 if (cs->cs_id == cirp->connection_id) 2001 break; 2002 } 2003 if (cs == NULL) { 2004 mtx_unlock(&cfiscsi_softc.lock); 2005 snprintf(ci->error_str, sizeof(ci->error_str), 2006 "connection not found"); 2007 ci->status = CTL_ISCSI_ERROR; 2008 return; 2009 } 2010 mtx_unlock(&cfiscsi_softc.lock); 2011 2012#if 0 2013 if (is->is_login_phase == false) 2014 return (EBUSY); 2015#endif 2016 2017 CFISCSI_SESSION_LOCK(cs); 2018 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2019 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2020 if (error != 0) { 2021 CFISCSI_SESSION_UNLOCK(cs); 2022 snprintf(ci->error_str, sizeof(ci->error_str), 2023 "interrupted by signal"); 2024 ci->status = CTL_ISCSI_ERROR; 2025 return; 2026 } 2027 } 2028 2029 if (cs->cs_terminating) { 2030 CFISCSI_SESSION_UNLOCK(cs); 2031 snprintf(ci->error_str, sizeof(ci->error_str), 2032 "connection terminating"); 2033 ci->status = CTL_ISCSI_ERROR; 2034 return; 2035 } 2036 ip = cs->cs_login_pdu; 2037 cs->cs_login_pdu = NULL; 2038 CFISCSI_SESSION_UNLOCK(cs); 2039 2040 if (ip->ip_data_len > cirp->data_segment_len) { 2041 icl_pdu_free(ip); 2042 snprintf(ci->error_str, sizeof(ci->error_str), 2043 "data segment too big"); 2044 ci->status = CTL_ISCSI_ERROR; 2045 return; 2046 } 2047 2048 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2049 if (ip->ip_data_len > 0) { 2050 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2051 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2052 copyout(data, cirp->data_segment, ip->ip_data_len); 2053 free(data, M_CFISCSI); 2054 } 2055 2056 icl_pdu_free(ip); 2057 ci->status = CTL_ISCSI_OK; 2058} 2059 2060#endif /* !ICL_KERNEL_PROXY */ 2061 2062static void 2063cfiscsi_ioctl_port_create(struct ctl_req *req) 2064{ 2065 struct cfiscsi_target *ct; 2066 struct ctl_port *port; 2067 const char *target, *alias, *tags; 2068 struct scsi_vpd_id_descriptor *desc; 2069 ctl_options_t opts; 2070 int retval, len, idlen; 2071 uint16_t tag; 2072 2073 ctl_init_opts(&opts, req->num_args, req->kern_args); 2074 target = ctl_get_opt(&opts, "cfiscsi_target"); 2075 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2076 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2077 if (target == NULL || tags == NULL) { 2078 req->status = CTL_LUN_ERROR; 2079 snprintf(req->error_str, sizeof(req->error_str), 2080 "Missing required argument"); 2081 ctl_free_opts(&opts); 2082 return; 2083 } 2084 tag = strtol(tags, (char **)NULL, 10); 2085 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2086 if (ct == NULL) { 2087 req->status = CTL_LUN_ERROR; 2088 snprintf(req->error_str, sizeof(req->error_str), 2089 "failed to create target \"%s\"", target); 2090 ctl_free_opts(&opts); 2091 return; 2092 } 2093 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2094 req->status = CTL_LUN_ERROR; 2095 snprintf(req->error_str, sizeof(req->error_str), 2096 "target \"%s\" for portal group tag %u already exists", 2097 target, tag); 2098 cfiscsi_target_release(ct); 2099 ctl_free_opts(&opts); 2100 return; 2101 } 2102 port = &ct->ct_port; 2103 // WAT 2104 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2105 goto done; 2106 2107 port->frontend = &cfiscsi_frontend; 2108 port->port_type = CTL_PORT_ISCSI; 2109 /* XXX KDM what should the real number be here? */ 2110 port->num_requested_ctl_io = 4096; 2111 port->port_name = "iscsi"; 2112 port->physical_port = tag; 2113 port->virtual_port = ct->ct_target_id; 2114 port->port_online = cfiscsi_online; 2115 port->port_offline = cfiscsi_offline; 2116 port->port_info = cfiscsi_info; 2117 port->onoff_arg = ct; 2118 port->fe_datamove = cfiscsi_datamove; 2119 port->fe_done = cfiscsi_done; 2120 2121 /* XXX KDM what should we report here? */ 2122 /* XXX These should probably be fetched from CTL. */ 2123 port->max_targets = 1; 2124 port->max_target_id = 15; 2125 port->targ_port = -1; 2126 2127 port->options = opts; 2128 STAILQ_INIT(&opts); 2129 2130 /* Generate Port ID. */ 2131 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2132 idlen = roundup2(idlen, 4); 2133 len = sizeof(struct scsi_vpd_device_id) + idlen; 2134 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2135 M_CTL, M_WAITOK | M_ZERO); 2136 port->port_devid->len = len; 2137 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2138 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2139 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2140 SVPD_ID_TYPE_SCSI_NAME; 2141 desc->length = idlen; 2142 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2143 2144 /* Generate Target ID. */ 2145 idlen = strlen(target) + 1; 2146 idlen = roundup2(idlen, 4); 2147 len = sizeof(struct scsi_vpd_device_id) + idlen; 2148 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2149 M_CTL, M_WAITOK | M_ZERO); 2150 port->target_devid->len = len; 2151 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2152 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2153 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2154 SVPD_ID_TYPE_SCSI_NAME; 2155 desc->length = idlen; 2156 strlcpy(desc->identifier, target, idlen); 2157 2158 retval = ctl_port_register(port); 2159 if (retval != 0) { 2160 ctl_free_opts(&port->options); 2161 cfiscsi_target_release(ct); 2162 free(port->port_devid, M_CFISCSI); 2163 free(port->target_devid, M_CFISCSI); 2164 req->status = CTL_LUN_ERROR; 2165 snprintf(req->error_str, sizeof(req->error_str), 2166 "ctl_port_register() failed with error %d", retval); 2167 return; 2168 } 2169done: 2170 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2171 req->status = CTL_LUN_OK; 2172 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2173 sizeof(port->targ_port)); //XXX 2174} 2175 2176static void 2177cfiscsi_ioctl_port_remove(struct ctl_req *req) 2178{ 2179 struct cfiscsi_target *ct; 2180 const char *target, *tags; 2181 ctl_options_t opts; 2182 uint16_t tag; 2183 2184 ctl_init_opts(&opts, req->num_args, req->kern_args); 2185 target = ctl_get_opt(&opts, "cfiscsi_target"); 2186 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2187 if (target == NULL || tags == NULL) { 2188 ctl_free_opts(&opts); 2189 req->status = CTL_LUN_ERROR; 2190 snprintf(req->error_str, sizeof(req->error_str), 2191 "Missing required argument"); 2192 return; 2193 } 2194 tag = strtol(tags, (char **)NULL, 10); 2195 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2196 if (ct == NULL) { 2197 ctl_free_opts(&opts); 2198 req->status = CTL_LUN_ERROR; 2199 snprintf(req->error_str, sizeof(req->error_str), 2200 "can't find target \"%s\"", target); 2201 return; 2202 } 2203 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2204 ctl_free_opts(&opts); 2205 req->status = CTL_LUN_ERROR; 2206 snprintf(req->error_str, sizeof(req->error_str), 2207 "target \"%s\" is already dying", target); 2208 return; 2209 } 2210 ctl_free_opts(&opts); 2211 2212 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2213 ctl_port_offline(&ct->ct_port); 2214 cfiscsi_target_release(ct); 2215 cfiscsi_target_release(ct); 2216 req->status = CTL_LUN_OK; 2217} 2218 2219static int 2220cfiscsi_ioctl(struct cdev *dev, 2221 u_long cmd, caddr_t addr, int flag, struct thread *td) 2222{ 2223 struct ctl_iscsi *ci; 2224 struct ctl_req *req; 2225 2226 if (cmd == CTL_PORT_REQ) { 2227 req = (struct ctl_req *)addr; 2228 switch (req->reqtype) { 2229 case CTL_REQ_CREATE: 2230 cfiscsi_ioctl_port_create(req); 2231 break; 2232 case CTL_REQ_REMOVE: 2233 cfiscsi_ioctl_port_remove(req); 2234 break; 2235 default: 2236 req->status = CTL_LUN_ERROR; 2237 snprintf(req->error_str, sizeof(req->error_str), 2238 "Unsupported request type %d", req->reqtype); 2239 } 2240 return (0); 2241 } 2242 2243 if (cmd != CTL_ISCSI) 2244 return (ENOTTY); 2245 2246 ci = (struct ctl_iscsi *)addr; 2247 switch (ci->type) { 2248 case CTL_ISCSI_HANDOFF: 2249 cfiscsi_ioctl_handoff(ci); 2250 break; 2251 case CTL_ISCSI_LIST: 2252 cfiscsi_ioctl_list(ci); 2253 break; 2254 case CTL_ISCSI_LOGOUT: 2255 cfiscsi_ioctl_logout(ci); 2256 break; 2257 case CTL_ISCSI_TERMINATE: 2258 cfiscsi_ioctl_terminate(ci); 2259 break; 2260 case CTL_ISCSI_LIMITS: 2261 cfiscsi_ioctl_limits(ci); 2262 break; 2263#ifdef ICL_KERNEL_PROXY 2264 case CTL_ISCSI_LISTEN: 2265 cfiscsi_ioctl_listen(ci); 2266 break; 2267 case CTL_ISCSI_ACCEPT: 2268 cfiscsi_ioctl_accept(ci); 2269 break; 2270 case CTL_ISCSI_SEND: 2271 cfiscsi_ioctl_send(ci); 2272 break; 2273 case CTL_ISCSI_RECEIVE: 2274 cfiscsi_ioctl_receive(ci); 2275 break; 2276#else 2277 case CTL_ISCSI_LISTEN: 2278 case CTL_ISCSI_ACCEPT: 2279 case CTL_ISCSI_SEND: 2280 case CTL_ISCSI_RECEIVE: 2281 ci->status = CTL_ISCSI_ERROR; 2282 snprintf(ci->error_str, sizeof(ci->error_str), 2283 "%s: CTL compiled without ICL_KERNEL_PROXY", 2284 __func__); 2285 break; 2286#endif /* !ICL_KERNEL_PROXY */ 2287 default: 2288 ci->status = CTL_ISCSI_ERROR; 2289 snprintf(ci->error_str, sizeof(ci->error_str), 2290 "%s: invalid iSCSI request type %d", __func__, ci->type); 2291 break; 2292 } 2293 2294 return (0); 2295} 2296 2297static void 2298cfiscsi_target_hold(struct cfiscsi_target *ct) 2299{ 2300 2301 refcount_acquire(&ct->ct_refcount); 2302} 2303 2304static void 2305cfiscsi_target_release(struct cfiscsi_target *ct) 2306{ 2307 struct cfiscsi_softc *softc; 2308 2309 softc = ct->ct_softc; 2310 mtx_lock(&softc->lock); 2311 if (refcount_release(&ct->ct_refcount)) { 2312 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2313 mtx_unlock(&softc->lock); 2314 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2315 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2316 if (ctl_port_deregister(&ct->ct_port) != 0) 2317 printf("%s: ctl_port_deregister() failed\n", 2318 __func__); 2319 } 2320 free(ct, M_CFISCSI); 2321 2322 return; 2323 } 2324 mtx_unlock(&softc->lock); 2325} 2326 2327static struct cfiscsi_target * 2328cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2329{ 2330 struct cfiscsi_target *ct; 2331 2332 mtx_lock(&softc->lock); 2333 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2334 if (ct->ct_tag != tag || 2335 strcmp(name, ct->ct_name) != 0 || 2336 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2337 continue; 2338 cfiscsi_target_hold(ct); 2339 mtx_unlock(&softc->lock); 2340 return (ct); 2341 } 2342 mtx_unlock(&softc->lock); 2343 2344 return (NULL); 2345} 2346 2347static struct cfiscsi_target * 2348cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2349 const char *alias, uint16_t tag) 2350{ 2351 struct cfiscsi_target *ct, *newct; 2352 2353 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2354 return (NULL); 2355 2356 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2357 2358 mtx_lock(&softc->lock); 2359 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2360 if (ct->ct_tag != tag || 2361 strcmp(name, ct->ct_name) != 0 || 2362 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2363 continue; 2364 cfiscsi_target_hold(ct); 2365 mtx_unlock(&softc->lock); 2366 free(newct, M_CFISCSI); 2367 return (ct); 2368 } 2369 2370 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2371 if (alias != NULL) 2372 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2373 newct->ct_tag = tag; 2374 refcount_init(&newct->ct_refcount, 1); 2375 newct->ct_softc = softc; 2376 if (TAILQ_EMPTY(&softc->targets)) 2377 softc->last_target_id = 0; 2378 newct->ct_target_id = ++softc->last_target_id; 2379 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2380 mtx_unlock(&softc->lock); 2381 2382 return (newct); 2383} 2384 2385static void 2386cfiscsi_datamove_in(union ctl_io *io) 2387{ 2388 struct cfiscsi_session *cs; 2389 struct icl_pdu *request, *response; 2390 const struct iscsi_bhs_scsi_command *bhssc; 2391 struct iscsi_bhs_data_in *bhsdi; 2392 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2393 size_t len, expected_len, sg_len, buffer_offset; 2394 const char *sg_addr; 2395 int ctl_sg_count, error, i; 2396 2397 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2398 cs = PDU_SESSION(request); 2399 2400 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2401 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2402 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2403 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2404 2405 if (io->scsiio.kern_sg_entries > 0) { 2406 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2407 ctl_sg_count = io->scsiio.kern_sg_entries; 2408 } else { 2409 ctl_sglist = &ctl_sg_entry; 2410 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2411 ctl_sglist->len = io->scsiio.kern_data_len; 2412 ctl_sg_count = 1; 2413 } 2414 2415 /* 2416 * This is the total amount of data to be transferred within the current 2417 * SCSI command. We need to record it so that we can properly report 2418 * underflow/underflow. 2419 */ 2420 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2421 2422 /* 2423 * This is the offset within the current SCSI command; for the first 2424 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2425 * it will be the sum of lengths of previous ones. 2426 */ 2427 buffer_offset = io->scsiio.kern_rel_offset; 2428 2429 /* 2430 * This is the transfer length expected by the initiator. In theory, 2431 * it could be different from the correct amount of data from the SCSI 2432 * point of view, even if that doesn't make any sense. 2433 */ 2434 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2435#if 0 2436 if (expected_len != io->scsiio.kern_total_len) { 2437 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2438 "actual length %zd", expected_len, 2439 (size_t)io->scsiio.kern_total_len); 2440 } 2441#endif 2442 2443 if (buffer_offset >= expected_len) { 2444#if 0 2445 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2446 "already sent the expected len", buffer_offset); 2447#endif 2448 io->scsiio.be_move_done(io); 2449 return; 2450 } 2451 2452 i = 0; 2453 sg_addr = NULL; 2454 sg_len = 0; 2455 response = NULL; 2456 bhsdi = NULL; 2457 for (;;) { 2458 if (response == NULL) { 2459 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2460 if (response == NULL) { 2461 CFISCSI_SESSION_WARN(cs, "failed to " 2462 "allocate memory; dropping connection"); 2463 ctl_set_busy(&io->scsiio); 2464 io->scsiio.be_move_done(io); 2465 cfiscsi_session_terminate(cs); 2466 return; 2467 } 2468 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2469 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2470 bhsdi->bhsdi_initiator_task_tag = 2471 bhssc->bhssc_initiator_task_tag; 2472 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2473 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2474 PDU_EXPDATASN(request)++; 2475 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2476 } 2477 2478 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2479 if (sg_len == 0) { 2480 sg_addr = ctl_sglist[i].addr; 2481 sg_len = ctl_sglist[i].len; 2482 KASSERT(sg_len > 0, ("sg_len <= 0")); 2483 } 2484 2485 len = sg_len; 2486 2487 /* 2488 * Truncate to maximum data segment length. 2489 */ 2490 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2491 ("ip_data_len %zd >= max_data_segment_length %zd", 2492 response->ip_data_len, cs->cs_max_data_segment_length)); 2493 if (response->ip_data_len + len > 2494 cs->cs_max_data_segment_length) { 2495 len = cs->cs_max_data_segment_length - 2496 response->ip_data_len; 2497 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2498 len, sg_len)); 2499 } 2500 2501 /* 2502 * Truncate to expected data transfer length. 2503 */ 2504 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2505 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2506 buffer_offset, response->ip_data_len, expected_len)); 2507 if (buffer_offset + response->ip_data_len + len > expected_len) { 2508 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2509 "to expected data transfer length %zd", 2510 buffer_offset + response->ip_data_len + len, expected_len); 2511 len = expected_len - (buffer_offset + response->ip_data_len); 2512 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2513 len, sg_len)); 2514 } 2515 2516 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2517 if (error != 0) { 2518 CFISCSI_SESSION_WARN(cs, "failed to " 2519 "allocate memory; dropping connection"); 2520 icl_pdu_free(response); 2521 ctl_set_busy(&io->scsiio); 2522 io->scsiio.be_move_done(io); 2523 cfiscsi_session_terminate(cs); 2524 return; 2525 } 2526 sg_addr += len; 2527 sg_len -= len; 2528 io->scsiio.kern_data_resid -= len; 2529 2530 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2531 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2532 buffer_offset, response->ip_data_len, expected_len)); 2533 if (buffer_offset + response->ip_data_len == expected_len) { 2534 /* 2535 * Already have the amount of data the initiator wanted. 2536 */ 2537 break; 2538 } 2539 2540 if (sg_len == 0) { 2541 /* 2542 * End of scatter-gather segment; 2543 * proceed to the next one... 2544 */ 2545 if (i == ctl_sg_count - 1) { 2546 /* 2547 * ... unless this was the last one. 2548 */ 2549 break; 2550 } 2551 i++; 2552 } 2553 2554 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2555 /* 2556 * Can't stuff more data into the current PDU; 2557 * queue it. Note that's not enough to check 2558 * for kern_data_resid == 0 instead; there 2559 * may be several Data-In PDUs for the final 2560 * call to cfiscsi_datamove(), and we want 2561 * to set the F flag only on the last of them. 2562 */ 2563 buffer_offset += response->ip_data_len; 2564 if (buffer_offset == io->scsiio.kern_total_len || 2565 buffer_offset == expected_len) { 2566 buffer_offset -= response->ip_data_len; 2567 break; 2568 } 2569 cfiscsi_pdu_queue(response); 2570 response = NULL; 2571 bhsdi = NULL; 2572 } 2573 } 2574 if (response != NULL) { 2575 buffer_offset += response->ip_data_len; 2576 if (buffer_offset == io->scsiio.kern_total_len || 2577 buffer_offset == expected_len) { 2578 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2579 if (io->io_hdr.status == CTL_SUCCESS) { 2580 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2581 if (PDU_TOTAL_TRANSFER_LEN(request) < 2582 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2583 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2584 bhsdi->bhsdi_residual_count = 2585 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2586 PDU_TOTAL_TRANSFER_LEN(request)); 2587 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2588 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2589 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2590 bhsdi->bhsdi_residual_count = 2591 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2592 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2593 } 2594 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2595 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2596 } 2597 } 2598 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2599 cfiscsi_pdu_queue(response); 2600 } 2601 2602 io->scsiio.be_move_done(io); 2603} 2604 2605static void 2606cfiscsi_datamove_out(union ctl_io *io) 2607{ 2608 struct cfiscsi_session *cs; 2609 struct icl_pdu *request, *response; 2610 const struct iscsi_bhs_scsi_command *bhssc; 2611 struct iscsi_bhs_r2t *bhsr2t; 2612 struct cfiscsi_data_wait *cdw; 2613 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2614 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2615 uint32_t target_transfer_tag; 2616 bool done; 2617 2618 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2619 cs = PDU_SESSION(request); 2620 2621 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2622 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2623 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2624 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2625 2626 /* 2627 * We need to record it so that we can properly report 2628 * underflow/underflow. 2629 */ 2630 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2631 2632 /* 2633 * Complete write underflow. Not a single byte to read. Return. 2634 */ 2635 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2636 if (io->scsiio.kern_rel_offset >= expected_len) { 2637 io->scsiio.be_move_done(io); 2638 return; 2639 } 2640 datamove_len = MIN(io->scsiio.kern_data_len, 2641 expected_len - io->scsiio.kern_rel_offset); 2642 2643 target_transfer_tag = 2644 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2645 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2646 &target_transfer_tag); 2647 if (cdw == NULL) { 2648 CFISCSI_SESSION_WARN(cs, "failed to " 2649 "allocate memory; dropping connection"); 2650 ctl_set_busy(&io->scsiio); 2651 io->scsiio.be_move_done(io); 2652 cfiscsi_session_terminate(cs); 2653 return; 2654 } 2655#if 0 2656 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2657 "task tag 0x%x, target transfer tag 0x%x", 2658 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2659#endif 2660 2661 cdw->cdw_ctl_io = io; 2662 cdw->cdw_target_transfer_tag = target_transfer_tag; 2663 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2664 cdw->cdw_r2t_end = datamove_len; 2665 cdw->cdw_datasn = 0; 2666 2667 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2668 if (io->scsiio.kern_sg_entries > 0) { 2669 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2670 } else { 2671 ctl_sglist = &ctl_sg_entry; 2672 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2673 ctl_sglist->len = datamove_len; 2674 } 2675 cdw->cdw_sg_index = 0; 2676 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2677 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2678 r2t_off = io->scsiio.ext_data_filled; 2679 while (r2t_off > 0) { 2680 if (r2t_off >= cdw->cdw_sg_len) { 2681 r2t_off -= cdw->cdw_sg_len; 2682 cdw->cdw_sg_index++; 2683 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2684 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2685 continue; 2686 } 2687 cdw->cdw_sg_addr += r2t_off; 2688 cdw->cdw_sg_len -= r2t_off; 2689 r2t_off = 0; 2690 } 2691 2692 if (cs->cs_immediate_data && 2693 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2694 icl_pdu_data_segment_length(request)) { 2695 done = cfiscsi_handle_data_segment(request, cdw); 2696 if (done) { 2697 cfiscsi_data_wait_free(cs, cdw); 2698 io->scsiio.be_move_done(io); 2699 return; 2700 } 2701 } 2702 2703 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2704 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2705 cs->cs_max_burst_length); 2706 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2707 2708 CFISCSI_SESSION_LOCK(cs); 2709 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2710 CFISCSI_SESSION_UNLOCK(cs); 2711 2712 /* 2713 * XXX: We should limit the number of outstanding R2T PDUs 2714 * per task to MaxOutstandingR2T. 2715 */ 2716 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2717 if (response == NULL) { 2718 CFISCSI_SESSION_WARN(cs, "failed to " 2719 "allocate memory; dropping connection"); 2720 ctl_set_busy(&io->scsiio); 2721 io->scsiio.be_move_done(io); 2722 cfiscsi_session_terminate(cs); 2723 return; 2724 } 2725 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2726 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2727 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2728 bhsr2t->bhsr2t_flags = 0x80; 2729 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2730 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2731 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2732 /* 2733 * XXX: Here we assume that cfiscsi_datamove() won't ever 2734 * be running concurrently on several CPUs for a given 2735 * command. 2736 */ 2737 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2738 PDU_R2TSN(request)++; 2739 /* 2740 * This is the offset within the current SCSI command; 2741 * i.e. for the first call of datamove(), it will be 0, 2742 * and for subsequent ones it will be the sum of lengths 2743 * of previous ones. 2744 * 2745 * The ext_data_filled is to account for unsolicited 2746 * (immediate) data that might have already arrived. 2747 */ 2748 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2749 /* 2750 * This is the total length (sum of S/G lengths) this call 2751 * to cfiscsi_datamove() is supposed to handle, limited by 2752 * MaxBurstLength. 2753 */ 2754 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2755 cfiscsi_pdu_queue(response); 2756} 2757 2758static void 2759cfiscsi_datamove(union ctl_io *io) 2760{ 2761 2762 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2763 cfiscsi_datamove_in(io); 2764 else { 2765 /* We hadn't received anything during this datamove yet. */ 2766 io->scsiio.ext_data_filled = 0; 2767 cfiscsi_datamove_out(io); 2768 } 2769} 2770 2771static void 2772cfiscsi_scsi_command_done(union ctl_io *io) 2773{ 2774 struct icl_pdu *request, *response; 2775 struct iscsi_bhs_scsi_command *bhssc; 2776 struct iscsi_bhs_scsi_response *bhssr; 2777#ifdef DIAGNOSTIC 2778 struct cfiscsi_data_wait *cdw; 2779#endif 2780 struct cfiscsi_session *cs; 2781 uint16_t sense_length; 2782 2783 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2784 cs = PDU_SESSION(request); 2785 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2786 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2787 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2788 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2789 2790 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2791 // bhssc->bhssc_initiator_task_tag); 2792 2793#ifdef DIAGNOSTIC 2794 CFISCSI_SESSION_LOCK(cs); 2795 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2796 KASSERT(bhssc->bhssc_initiator_task_tag != 2797 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2798 CFISCSI_SESSION_UNLOCK(cs); 2799#endif 2800 2801 /* 2802 * Do not return status for aborted commands. 2803 * There are exceptions, but none supported by CTL yet. 2804 */ 2805 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2806 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2807 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2808 ctl_free_io(io); 2809 icl_pdu_free(request); 2810 return; 2811 } 2812 2813 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2814 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2815 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2816 bhssr->bhssr_flags = 0x80; 2817 /* 2818 * XXX: We don't deal with bidirectional under/overflows; 2819 * does anything actually support those? 2820 */ 2821 if (PDU_TOTAL_TRANSFER_LEN(request) < 2822 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2823 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2824 bhssr->bhssr_residual_count = 2825 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2826 PDU_TOTAL_TRANSFER_LEN(request)); 2827 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2828 // ntohl(bhssr->bhssr_residual_count)); 2829 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2830 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2831 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2832 bhssr->bhssr_residual_count = 2833 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2834 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2835 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2836 // ntohl(bhssr->bhssr_residual_count)); 2837 } 2838 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2839 bhssr->bhssr_status = io->scsiio.scsi_status; 2840 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2841 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2842 2843 if (io->scsiio.sense_len > 0) { 2844#if 0 2845 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2846 io->scsiio.sense_len); 2847#endif 2848 sense_length = htons(io->scsiio.sense_len); 2849 icl_pdu_append_data(response, 2850 &sense_length, sizeof(sense_length), M_WAITOK); 2851 icl_pdu_append_data(response, 2852 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2853 } 2854 2855 ctl_free_io(io); 2856 icl_pdu_free(request); 2857 cfiscsi_pdu_queue(response); 2858} 2859 2860static void 2861cfiscsi_task_management_done(union ctl_io *io) 2862{ 2863 struct icl_pdu *request, *response; 2864 struct iscsi_bhs_task_management_request *bhstmr; 2865 struct iscsi_bhs_task_management_response *bhstmr2; 2866 struct cfiscsi_data_wait *cdw, *tmpcdw; 2867 struct cfiscsi_session *cs, *tcs; 2868 struct cfiscsi_softc *softc; 2869 int cold_reset = 0; 2870 2871 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2872 cs = PDU_SESSION(request); 2873 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2874 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2875 ISCSI_BHS_OPCODE_TASK_REQUEST, 2876 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2877 2878#if 0 2879 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2880 bhstmr->bhstmr_initiator_task_tag, 2881 bhstmr->bhstmr_referenced_task_tag); 2882#endif 2883 2884 if ((bhstmr->bhstmr_function & ~0x80) == 2885 BHSTMR_FUNCTION_ABORT_TASK) { 2886 /* 2887 * Make sure we no longer wait for Data-Out for this command. 2888 */ 2889 CFISCSI_SESSION_LOCK(cs); 2890 TAILQ_FOREACH_SAFE(cdw, 2891 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2892 if (bhstmr->bhstmr_referenced_task_tag != 2893 cdw->cdw_initiator_task_tag) 2894 continue; 2895 2896#if 0 2897 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2898 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2899#endif 2900 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2901 cdw, cdw_next); 2902 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2903 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2904 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2905 cfiscsi_data_wait_free(cs, cdw); 2906 } 2907 CFISCSI_SESSION_UNLOCK(cs); 2908 } 2909 if ((bhstmr->bhstmr_function & ~0x80) == 2910 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2911 io->io_hdr.status == CTL_SUCCESS) 2912 cold_reset = 1; 2913 2914 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2915 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2916 response->ip_bhs; 2917 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2918 bhstmr2->bhstmr_flags = 0x80; 2919 switch (io->taskio.task_status) { 2920 case CTL_TASK_FUNCTION_COMPLETE: 2921 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2922 break; 2923 case CTL_TASK_FUNCTION_SUCCEEDED: 2924 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2925 break; 2926 case CTL_TASK_LUN_DOES_NOT_EXIST: 2927 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2928 break; 2929 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2930 default: 2931 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2932 break; 2933 } 2934 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2935 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2936 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2937 2938 ctl_free_io(io); 2939 icl_pdu_free(request); 2940 cfiscsi_pdu_queue(response); 2941 2942 if (cold_reset) { 2943 softc = cs->cs_target->ct_softc; 2944 mtx_lock(&softc->lock); 2945 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2946 if (tcs->cs_target == cs->cs_target) 2947 cfiscsi_session_terminate(tcs); 2948 } 2949 mtx_unlock(&softc->lock); 2950 } 2951} 2952 2953static void 2954cfiscsi_done(union ctl_io *io) 2955{ 2956 struct icl_pdu *request; 2957 struct cfiscsi_session *cs; 2958 2959 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2960 ("invalid CTL status %#x", io->io_hdr.status)); 2961 2962 if (io->io_hdr.io_type == CTL_IO_TASK && 2963 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2964 /* 2965 * Implicit task termination has just completed; nothing to do. 2966 */ 2967 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2968 cs->cs_tasks_aborted = true; 2969 refcount_release(&cs->cs_outstanding_ctl_pdus); 2970 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2971 ctl_free_io(io); 2972 return; 2973 } 2974 2975 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2976 cs = PDU_SESSION(request); 2977 refcount_release(&cs->cs_outstanding_ctl_pdus); 2978 2979 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2980 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2981 cfiscsi_scsi_command_done(io); 2982 break; 2983 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2984 cfiscsi_task_management_done(io); 2985 break; 2986 default: 2987 panic("cfiscsi_done called with wrong opcode 0x%x", 2988 request->ip_bhs->bhs_opcode); 2989 } 2990} 2991