ctl_frontend_iscsi.c revision 313363
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/10/sys/cam/ctl/ctl_frontend_iscsi.c 313363 2017-02-07 01:39:25Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 313363 2017-02-07 01:39:25Z 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/sysctl.h> 53#include <sys/systm.h> 54#include <sys/uio.h> 55#include <sys/unistd.h> 56#include <vm/uma.h> 57 58#include <cam/scsi/scsi_all.h> 59#include <cam/scsi/scsi_da.h> 60#include <cam/ctl/ctl_io.h> 61#include <cam/ctl/ctl.h> 62#include <cam/ctl/ctl_backend.h> 63#include <cam/ctl/ctl_error.h> 64#include <cam/ctl/ctl_frontend.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include <dev/iscsi/icl.h> 71#include <dev/iscsi/iscsi_proto.h> 72#include <cam/ctl/ctl_frontend_iscsi.h> 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 1; 88TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 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; 96TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99static int maxcmdsn_delta = 256; 100TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105#define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113#define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130#define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145#define PDU_EXPDATASN(X) (X)->ip_prv0 146#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147#define PDU_R2TSN(X) (X)->ip_prv2 148 149int cfiscsi_init(void); 150static void cfiscsi_online(void *arg); 151static void cfiscsi_offline(void *arg); 152static int cfiscsi_info(void *arg, struct sbuf *sb); 153static int cfiscsi_ioctl(struct cdev *dev, 154 u_long cmd, caddr_t addr, int flag, struct thread *td); 155static void cfiscsi_datamove(union ctl_io *io); 156static void cfiscsi_datamove_in(union ctl_io *io); 157static void cfiscsi_datamove_out(union ctl_io *io); 158static void cfiscsi_done(union ctl_io *io); 159static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 160static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 161static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 162static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 163static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 164static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 165static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 166static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 167 *softc, const char *name, uint16_t tag); 168static struct cfiscsi_target *cfiscsi_target_find_or_create( 169 struct cfiscsi_softc *softc, const char *name, const char *alias, 170 uint16_t tag); 171static void cfiscsi_target_release(struct cfiscsi_target *ct); 172static void cfiscsi_session_delete(struct cfiscsi_session *cs); 173 174static struct cfiscsi_softc cfiscsi_softc; 175 176static struct ctl_frontend cfiscsi_frontend = 177{ 178 .name = "iscsi", 179 .init = cfiscsi_init, 180 .ioctl = cfiscsi_ioctl, 181}; 182CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 183MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 184 185static struct icl_pdu * 186cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 187{ 188 189 return (icl_pdu_new(request->ip_conn, flags)); 190} 191 192static bool 193cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 194{ 195 const struct iscsi_bhs_scsi_command *bhssc; 196 struct cfiscsi_session *cs; 197 uint32_t cmdsn, expstatsn; 198 199 cs = PDU_SESSION(request); 200 201 /* 202 * Every incoming PDU - not just NOP-Out - resets the ping timer. 203 * The purpose of the timeout is to reset the connection when it stalls; 204 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 205 * in some queue. 206 * 207 * XXX: Locking? 208 */ 209 cs->cs_timeout = 0; 210 211 /* 212 * Data-Out PDUs don't contain CmdSN. 213 */ 214 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 215 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 216 return (false); 217 218 /* 219 * We're only using fields common for all the request 220 * (initiator -> target) PDUs. 221 */ 222 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 223 cmdsn = ntohl(bhssc->bhssc_cmdsn); 224 expstatsn = ntohl(bhssc->bhssc_expstatsn); 225 226 CFISCSI_SESSION_LOCK(cs); 227#if 0 228 if (expstatsn != cs->cs_statsn) { 229 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 230 "while current StatSN is %d", expstatsn, 231 cs->cs_statsn); 232 } 233#endif 234 235 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 236 /* 237 * The target MUST silently ignore any non-immediate command 238 * outside of this range. 239 */ 240 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 241 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 242 CFISCSI_SESSION_UNLOCK(cs); 243 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 244 "while expected %u", cmdsn, cs->cs_cmdsn); 245 return (true); 246 } 247 248 /* 249 * We don't support multiple connections now, so any 250 * discontinuity in CmdSN means lost PDUs. Since we don't 251 * support PDU retransmission -- terminate the connection. 252 */ 253 if (cmdsn != cs->cs_cmdsn) { 254 CFISCSI_SESSION_UNLOCK(cs); 255 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 256 "while expected %u; dropping connection", 257 cmdsn, cs->cs_cmdsn); 258 cfiscsi_session_terminate(cs); 259 return (true); 260 } 261 cs->cs_cmdsn++; 262 } 263 264 CFISCSI_SESSION_UNLOCK(cs); 265 266 return (false); 267} 268 269static void 270cfiscsi_pdu_handle(struct icl_pdu *request) 271{ 272 struct cfiscsi_session *cs; 273 bool ignore; 274 275 cs = PDU_SESSION(request); 276 277 ignore = cfiscsi_pdu_update_cmdsn(request); 278 if (ignore) { 279 icl_pdu_free(request); 280 return; 281 } 282 283 /* 284 * Handle the PDU; this includes e.g. receiving the remaining 285 * part of PDU and submitting the SCSI command to CTL 286 * or queueing a reply. The handling routine is responsible 287 * for freeing the PDU when it's no longer needed. 288 */ 289 switch (request->ip_bhs->bhs_opcode & 290 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 291 case ISCSI_BHS_OPCODE_NOP_OUT: 292 cfiscsi_pdu_handle_nop_out(request); 293 break; 294 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 295 cfiscsi_pdu_handle_scsi_command(request); 296 break; 297 case ISCSI_BHS_OPCODE_TASK_REQUEST: 298 cfiscsi_pdu_handle_task_request(request); 299 break; 300 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 301 cfiscsi_pdu_handle_data_out(request); 302 break; 303 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 304 cfiscsi_pdu_handle_logout_request(request); 305 break; 306 default: 307 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 308 "opcode 0x%x; dropping connection", 309 request->ip_bhs->bhs_opcode); 310 icl_pdu_free(request); 311 cfiscsi_session_terminate(cs); 312 } 313 314} 315 316static void 317cfiscsi_receive_callback(struct icl_pdu *request) 318{ 319 struct cfiscsi_session *cs; 320 321 cs = PDU_SESSION(request); 322 323#ifdef ICL_KERNEL_PROXY 324 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 325 if (cs->cs_login_pdu == NULL) 326 cs->cs_login_pdu = request; 327 else 328 icl_pdu_free(request); 329 cv_signal(&cs->cs_login_cv); 330 return; 331 } 332#endif 333 334 cfiscsi_pdu_handle(request); 335} 336 337static void 338cfiscsi_error_callback(struct icl_conn *ic) 339{ 340 struct cfiscsi_session *cs; 341 342 cs = CONN_SESSION(ic); 343 344 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 345 cfiscsi_session_terminate(cs); 346} 347 348static int 349cfiscsi_pdu_prepare(struct icl_pdu *response) 350{ 351 struct cfiscsi_session *cs; 352 struct iscsi_bhs_scsi_response *bhssr; 353 bool advance_statsn = true; 354 355 cs = PDU_SESSION(response); 356 357 CFISCSI_SESSION_LOCK_ASSERT(cs); 358 359 /* 360 * We're only using fields common for all the response 361 * (target -> initiator) PDUs. 362 */ 363 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 364 365 /* 366 * 10.8.3: "The StatSN for this connection is not advanced 367 * after this PDU is sent." 368 */ 369 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 370 advance_statsn = false; 371 372 /* 373 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 374 * StatSN for the connection is not advanced after this PDU is sent." 375 */ 376 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 377 bhssr->bhssr_initiator_task_tag == 0xffffffff) 378 advance_statsn = false; 379 380 /* 381 * See the comment below - StatSN is not meaningful and must 382 * not be advanced. 383 */ 384 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 385 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 386 advance_statsn = false; 387 388 /* 389 * 10.7.3: "The fields StatSN, Status, and Residual Count 390 * only have meaningful content if the S bit is set to 1." 391 */ 392 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 393 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 394 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 395 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 396 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 397 398 if (advance_statsn) 399 cs->cs_statsn++; 400 401 return (0); 402} 403 404static void 405cfiscsi_pdu_queue(struct icl_pdu *response) 406{ 407 struct cfiscsi_session *cs; 408 409 cs = PDU_SESSION(response); 410 411 CFISCSI_SESSION_LOCK(cs); 412 cfiscsi_pdu_prepare(response); 413 icl_pdu_queue(response); 414 CFISCSI_SESSION_UNLOCK(cs); 415} 416 417static void 418cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 419{ 420 struct cfiscsi_session *cs; 421 struct iscsi_bhs_nop_out *bhsno; 422 struct iscsi_bhs_nop_in *bhsni; 423 struct icl_pdu *response; 424 void *data = NULL; 425 size_t datasize; 426 int error; 427 428 cs = PDU_SESSION(request); 429 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 430 431 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 432 /* 433 * Nothing to do, iscsi_pdu_update_statsn() already 434 * zeroed the timeout. 435 */ 436 icl_pdu_free(request); 437 return; 438 } 439 440 datasize = icl_pdu_data_segment_length(request); 441 if (datasize > 0) { 442 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 443 if (data == NULL) { 444 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 445 "dropping connection"); 446 icl_pdu_free(request); 447 cfiscsi_session_terminate(cs); 448 return; 449 } 450 icl_pdu_get_data(request, 0, data, datasize); 451 } 452 453 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 454 if (response == NULL) { 455 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 456 "droppping connection"); 457 free(data, M_CFISCSI); 458 icl_pdu_free(request); 459 cfiscsi_session_terminate(cs); 460 return; 461 } 462 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 463 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 464 bhsni->bhsni_flags = 0x80; 465 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 466 bhsni->bhsni_target_transfer_tag = 0xffffffff; 467 if (datasize > 0) { 468 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 469 if (error != 0) { 470 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 471 "dropping connection"); 472 free(data, M_CFISCSI); 473 icl_pdu_free(request); 474 icl_pdu_free(response); 475 cfiscsi_session_terminate(cs); 476 return; 477 } 478 free(data, M_CFISCSI); 479 } 480 481 icl_pdu_free(request); 482 cfiscsi_pdu_queue(response); 483} 484 485static void 486cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 487{ 488 struct iscsi_bhs_scsi_command *bhssc; 489 struct cfiscsi_session *cs; 490 union ctl_io *io; 491 int error; 492 493 cs = PDU_SESSION(request); 494 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 495 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 496 // bhssc->bhssc_initiator_task_tag); 497 498 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 499 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 500 "ImmediateData=No; dropping connection"); 501 icl_pdu_free(request); 502 cfiscsi_session_terminate(cs); 503 return; 504 } 505 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 506 ctl_zero_io(io); 507 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 508 io->io_hdr.io_type = CTL_IO_SCSI; 509 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 510 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 511 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 512 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 513 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 514 case BHSSC_FLAGS_ATTR_UNTAGGED: 515 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 516 break; 517 case BHSSC_FLAGS_ATTR_SIMPLE: 518 io->scsiio.tag_type = CTL_TAG_SIMPLE; 519 break; 520 case BHSSC_FLAGS_ATTR_ORDERED: 521 io->scsiio.tag_type = CTL_TAG_ORDERED; 522 break; 523 case BHSSC_FLAGS_ATTR_HOQ: 524 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 525 break; 526 case BHSSC_FLAGS_ATTR_ACA: 527 io->scsiio.tag_type = CTL_TAG_ACA; 528 break; 529 default: 530 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 531 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 532 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 533 break; 534 } 535 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 536 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 537 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 538 error = ctl_queue(io); 539 if (error != CTL_RETVAL_COMPLETE) { 540 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 541 "dropping connection", error); 542 ctl_free_io(io); 543 refcount_release(&cs->cs_outstanding_ctl_pdus); 544 icl_pdu_free(request); 545 cfiscsi_session_terminate(cs); 546 } 547} 548 549static void 550cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 551{ 552 struct iscsi_bhs_task_management_request *bhstmr; 553 struct iscsi_bhs_task_management_response *bhstmr2; 554 struct icl_pdu *response; 555 struct cfiscsi_session *cs; 556 union ctl_io *io; 557 int error; 558 559 cs = PDU_SESSION(request); 560 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 561 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 562 ctl_zero_io(io); 563 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 564 io->io_hdr.io_type = CTL_IO_TASK; 565 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 566 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 567 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 568 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 569 570 switch (bhstmr->bhstmr_function & ~0x80) { 571 case BHSTMR_FUNCTION_ABORT_TASK: 572#if 0 573 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 574#endif 575 io->taskio.task_action = CTL_TASK_ABORT_TASK; 576 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 577 break; 578 case BHSTMR_FUNCTION_ABORT_TASK_SET: 579#if 0 580 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 581#endif 582 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 583 break; 584 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 585#if 0 586 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 587#endif 588 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 589 break; 590 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 591#if 0 592 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 593#endif 594 io->taskio.task_action = CTL_TASK_LUN_RESET; 595 break; 596 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 597#if 0 598 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 599#endif 600 io->taskio.task_action = CTL_TASK_TARGET_RESET; 601 break; 602 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 603#if 0 604 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 605#endif 606 io->taskio.task_action = CTL_TASK_TARGET_RESET; 607 break; 608 case BHSTMR_FUNCTION_QUERY_TASK: 609#if 0 610 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 611#endif 612 io->taskio.task_action = CTL_TASK_QUERY_TASK; 613 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 614 break; 615 case BHSTMR_FUNCTION_QUERY_TASK_SET: 616#if 0 617 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 618#endif 619 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 620 break; 621 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 622#if 0 623 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 624#endif 625 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 626 break; 627 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 628#if 0 629 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 630#endif 631 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 632 break; 633 default: 634 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 635 bhstmr->bhstmr_function & ~0x80); 636 ctl_free_io(io); 637 638 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 639 if (response == NULL) { 640 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 641 "dropping connection"); 642 icl_pdu_free(request); 643 cfiscsi_session_terminate(cs); 644 return; 645 } 646 bhstmr2 = (struct iscsi_bhs_task_management_response *) 647 response->ip_bhs; 648 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 649 bhstmr2->bhstmr_flags = 0x80; 650 bhstmr2->bhstmr_response = 651 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 652 bhstmr2->bhstmr_initiator_task_tag = 653 bhstmr->bhstmr_initiator_task_tag; 654 icl_pdu_free(request); 655 cfiscsi_pdu_queue(response); 656 return; 657 } 658 659 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 660 error = ctl_queue(io); 661 if (error != CTL_RETVAL_COMPLETE) { 662 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 663 "dropping connection", error); 664 ctl_free_io(io); 665 refcount_release(&cs->cs_outstanding_ctl_pdus); 666 icl_pdu_free(request); 667 cfiscsi_session_terminate(cs); 668 } 669} 670 671static bool 672cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 673{ 674 struct iscsi_bhs_data_out *bhsdo; 675 struct cfiscsi_session *cs; 676 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 677 size_t copy_len, len, off, buffer_offset; 678 int ctl_sg_count; 679 union ctl_io *io; 680 681 cs = PDU_SESSION(request); 682 683 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 684 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 685 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 686 ISCSI_BHS_OPCODE_SCSI_COMMAND, 687 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 688 689 /* 690 * We're only using fields common for Data-Out and SCSI Command PDUs. 691 */ 692 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 693 694 io = cdw->cdw_ctl_io; 695 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 696 ("CTL_FLAG_DATA_IN")); 697 698#if 0 699 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 700 request->ip_data_len, io->scsiio.kern_total_len); 701#endif 702 703 if (io->scsiio.kern_sg_entries > 0) { 704 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 705 ctl_sg_count = io->scsiio.kern_sg_entries; 706 } else { 707 ctl_sglist = &ctl_sg_entry; 708 ctl_sglist->addr = io->scsiio.kern_data_ptr; 709 ctl_sglist->len = io->scsiio.kern_data_len; 710 ctl_sg_count = 1; 711 } 712 713 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 714 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 715 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 716 else 717 buffer_offset = 0; 718 len = icl_pdu_data_segment_length(request); 719 720 /* 721 * Make sure the offset, as sent by the initiator, matches the offset 722 * we're supposed to be at in the scatter-gather list. 723 */ 724 if (buffer_offset > 725 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 726 buffer_offset + len <= 727 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 728 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 729 "expected %zd; dropping connection", buffer_offset, 730 (size_t)io->scsiio.kern_rel_offset + 731 (size_t)io->scsiio.ext_data_filled); 732 ctl_set_data_phase_error(&io->scsiio); 733 cfiscsi_session_terminate(cs); 734 return (true); 735 } 736 737 /* 738 * This is the offset within the PDU data segment, as opposed 739 * to buffer_offset, which is the offset within the task (SCSI 740 * command). 741 */ 742 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 743 buffer_offset; 744 745 /* 746 * Iterate over the scatter/gather segments, filling them with data 747 * from the PDU data segment. Note that this can get called multiple 748 * times for one SCSI command; the cdw structure holds state for the 749 * scatter/gather list. 750 */ 751 for (;;) { 752 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 753 ("cdw->cdw_sg_index >= ctl_sg_count")); 754 if (cdw->cdw_sg_len == 0) { 755 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 756 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 757 } 758 KASSERT(off <= len, ("len > off")); 759 copy_len = len - off; 760 if (copy_len > cdw->cdw_sg_len) 761 copy_len = cdw->cdw_sg_len; 762 763 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 764 cdw->cdw_sg_addr += copy_len; 765 cdw->cdw_sg_len -= copy_len; 766 off += copy_len; 767 io->scsiio.ext_data_filled += copy_len; 768 769 if (cdw->cdw_sg_len == 0) { 770 /* 771 * End of current segment. 772 */ 773 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 774 /* 775 * Last segment in scatter/gather list. 776 */ 777 break; 778 } 779 cdw->cdw_sg_index++; 780 } 781 782 if (off == len) { 783 /* 784 * End of PDU payload. 785 */ 786 break; 787 } 788 } 789 790 if (len > off) { 791 /* 792 * In case of unsolicited data, it's possible that the buffer 793 * provided by CTL is smaller than negotiated FirstBurstLength. 794 * Just ignore the superfluous data; will ask for them with R2T 795 * on next call to cfiscsi_datamove(). 796 * 797 * This obviously can only happen with SCSI Command PDU. 798 */ 799 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 800 ISCSI_BHS_OPCODE_SCSI_COMMAND) 801 return (true); 802 803 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 804 "expected %zd; dropping connection", 805 icl_pdu_data_segment_length(request), off); 806 ctl_set_data_phase_error(&io->scsiio); 807 cfiscsi_session_terminate(cs); 808 return (true); 809 } 810 811 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 812 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 813 CFISCSI_SESSION_WARN(cs, "got the final packet without " 814 "the F flag; flags = 0x%x; dropping connection", 815 bhsdo->bhsdo_flags); 816 ctl_set_data_phase_error(&io->scsiio); 817 cfiscsi_session_terminate(cs); 818 return (true); 819 } 820 821 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 822 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 823 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 824 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 825 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 826 "transmitted size was %zd bytes instead of %d; " 827 "dropping connection", 828 (size_t)io->scsiio.ext_data_filled, 829 cdw->cdw_r2t_end); 830 ctl_set_data_phase_error(&io->scsiio); 831 cfiscsi_session_terminate(cs); 832 return (true); 833 } else { 834 /* 835 * For SCSI Command PDU, this just means we need to 836 * solicit more data by sending R2T. 837 */ 838 return (false); 839 } 840 } 841 842 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 843#if 0 844 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 845 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 846#endif 847 848 return (true); 849 } 850 851 return (false); 852} 853 854static void 855cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 856{ 857 struct iscsi_bhs_data_out *bhsdo; 858 struct cfiscsi_session *cs; 859 struct cfiscsi_data_wait *cdw = NULL; 860 union ctl_io *io; 861 bool done; 862 863 cs = PDU_SESSION(request); 864 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 865 866 CFISCSI_SESSION_LOCK(cs); 867 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 868#if 0 869 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 870 "ttt 0x%x, itt 0x%x", 871 bhsdo->bhsdo_target_transfer_tag, 872 bhsdo->bhsdo_initiator_task_tag, 873 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 874#endif 875 if (bhsdo->bhsdo_target_transfer_tag == 876 cdw->cdw_target_transfer_tag) 877 break; 878 } 879 CFISCSI_SESSION_UNLOCK(cs); 880 if (cdw == NULL) { 881 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 882 "0x%x, not found; dropping connection", 883 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 884 icl_pdu_free(request); 885 cfiscsi_session_terminate(cs); 886 return; 887 } 888 889 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 890 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 891 "DataSN %u, while expected %u; dropping connection", 892 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 893 icl_pdu_free(request); 894 cfiscsi_session_terminate(cs); 895 return; 896 } 897 cdw->cdw_datasn++; 898 899 io = cdw->cdw_ctl_io; 900 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 901 ("CTL_FLAG_DATA_IN")); 902 903 done = cfiscsi_handle_data_segment(request, cdw); 904 if (done) { 905 CFISCSI_SESSION_LOCK(cs); 906 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 907 CFISCSI_SESSION_UNLOCK(cs); 908 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 909 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 910 uma_zfree(cfiscsi_data_wait_zone, cdw); 911 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 912 if (done) 913 io->scsiio.be_move_done(io); 914 else 915 cfiscsi_datamove_out(io); 916 } 917 918 icl_pdu_free(request); 919} 920 921static void 922cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 923{ 924 struct iscsi_bhs_logout_request *bhslr; 925 struct iscsi_bhs_logout_response *bhslr2; 926 struct icl_pdu *response; 927 struct cfiscsi_session *cs; 928 929 cs = PDU_SESSION(request); 930 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 931 switch (bhslr->bhslr_reason & 0x7f) { 932 case BHSLR_REASON_CLOSE_SESSION: 933 case BHSLR_REASON_CLOSE_CONNECTION: 934 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 935 if (response == NULL) { 936 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 937 icl_pdu_free(request); 938 cfiscsi_session_terminate(cs); 939 return; 940 } 941 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 942 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 943 bhslr2->bhslr_flags = 0x80; 944 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 945 bhslr2->bhslr_initiator_task_tag = 946 bhslr->bhslr_initiator_task_tag; 947 icl_pdu_free(request); 948 cfiscsi_pdu_queue(response); 949 cfiscsi_session_terminate(cs); 950 break; 951 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 952 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 953 if (response == NULL) { 954 CFISCSI_SESSION_WARN(cs, 955 "failed to allocate memory; dropping connection"); 956 icl_pdu_free(request); 957 cfiscsi_session_terminate(cs); 958 return; 959 } 960 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 961 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 962 bhslr2->bhslr_flags = 0x80; 963 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 964 bhslr2->bhslr_initiator_task_tag = 965 bhslr->bhslr_initiator_task_tag; 966 icl_pdu_free(request); 967 cfiscsi_pdu_queue(response); 968 break; 969 default: 970 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 971 bhslr->bhslr_reason); 972 icl_pdu_free(request); 973 cfiscsi_session_terminate(cs); 974 break; 975 } 976} 977 978static void 979cfiscsi_callout(void *context) 980{ 981 struct icl_pdu *cp; 982 struct iscsi_bhs_nop_in *bhsni; 983 struct cfiscsi_session *cs; 984 985 cs = context; 986 987 if (cs->cs_terminating) 988 return; 989 990 callout_schedule(&cs->cs_callout, 1 * hz); 991 992 atomic_add_int(&cs->cs_timeout, 1); 993 994#ifdef ICL_KERNEL_PROXY 995 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 996 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 997 CFISCSI_SESSION_WARN(cs, "login timed out after " 998 "%d seconds; dropping connection", cs->cs_timeout); 999 cfiscsi_session_terminate(cs); 1000 } 1001 return; 1002 } 1003#endif 1004 1005 if (ping_timeout <= 0) { 1006 /* 1007 * Pings are disabled. Don't send NOP-In in this case; 1008 * user might have disabled pings to work around problems 1009 * with certain initiators that can't properly handle 1010 * NOP-In, such as iPXE. Reset the timeout, to avoid 1011 * triggering reconnection, should the user decide to 1012 * reenable them. 1013 */ 1014 cs->cs_timeout = 0; 1015 return; 1016 } 1017 1018 if (cs->cs_timeout >= ping_timeout) { 1019 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1020 "dropping connection", ping_timeout); 1021 cfiscsi_session_terminate(cs); 1022 return; 1023 } 1024 1025 /* 1026 * If the ping was reset less than one second ago - which means 1027 * that we've received some PDU during the last second - assume 1028 * the traffic flows correctly and don't bother sending a NOP-Out. 1029 * 1030 * (It's 2 - one for one second, and one for incrementing is_timeout 1031 * earlier in this routine.) 1032 */ 1033 if (cs->cs_timeout < 2) 1034 return; 1035 1036 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1037 if (cp == NULL) { 1038 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1039 return; 1040 } 1041 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1042 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1043 bhsni->bhsni_flags = 0x80; 1044 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1045 1046 cfiscsi_pdu_queue(cp); 1047} 1048 1049static void 1050cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1051{ 1052 struct cfiscsi_data_wait *cdw; 1053 union ctl_io *io; 1054 int error, last, wait; 1055 1056 if (cs->cs_target == NULL) 1057 return; /* No target yet, so nothing to do. */ 1058 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1059 ctl_zero_io(io); 1060 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1061 io->io_hdr.io_type = CTL_IO_TASK; 1062 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1063 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1064 io->io_hdr.nexus.targ_lun = 0; 1065 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1066 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1067 wait = cs->cs_outstanding_ctl_pdus; 1068 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1069 error = ctl_queue(io); 1070 if (error != CTL_RETVAL_COMPLETE) { 1071 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1072 refcount_release(&cs->cs_outstanding_ctl_pdus); 1073 ctl_free_io(io); 1074 } 1075 1076 CFISCSI_SESSION_LOCK(cs); 1077 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1078 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1079 CFISCSI_SESSION_UNLOCK(cs); 1080 /* 1081 * Set nonzero port status; this prevents backends from 1082 * assuming that the data transfer actually succeeded 1083 * and writing uninitialized data to disk. 1084 */ 1085 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1086 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1087 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1088 uma_zfree(cfiscsi_data_wait_zone, cdw); 1089 CFISCSI_SESSION_LOCK(cs); 1090 } 1091 CFISCSI_SESSION_UNLOCK(cs); 1092 1093 /* 1094 * Wait for CTL to terminate all the tasks. 1095 */ 1096 if (wait > 0) 1097 CFISCSI_SESSION_WARN(cs, 1098 "waiting for CTL to terminate %d tasks", wait); 1099 for (;;) { 1100 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1101 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1102 if (last != 0) 1103 break; 1104 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1105 0, "cfiscsi_terminate", hz / 100); 1106 } 1107 if (wait > 0) 1108 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1109} 1110 1111static void 1112cfiscsi_maintenance_thread(void *arg) 1113{ 1114 struct cfiscsi_session *cs; 1115 1116 cs = arg; 1117 1118 for (;;) { 1119 CFISCSI_SESSION_LOCK(cs); 1120 if (cs->cs_terminating == false) 1121 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1122 CFISCSI_SESSION_UNLOCK(cs); 1123 1124 if (cs->cs_terminating) { 1125 1126 /* 1127 * We used to wait up to 30 seconds to deliver queued 1128 * PDUs to the initiator. We also tried hard to deliver 1129 * SCSI Responses for the aborted PDUs. We don't do 1130 * that anymore. We might need to revisit that. 1131 */ 1132 callout_drain(&cs->cs_callout); 1133 icl_conn_close(cs->cs_conn); 1134 1135 /* 1136 * At this point ICL receive thread is no longer 1137 * running; no new tasks can be queued. 1138 */ 1139 cfiscsi_session_terminate_tasks(cs); 1140 cfiscsi_session_delete(cs); 1141 kthread_exit(); 1142 return; 1143 } 1144 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1145 } 1146} 1147 1148static void 1149cfiscsi_session_terminate(struct cfiscsi_session *cs) 1150{ 1151 1152 if (cs->cs_terminating) 1153 return; 1154 cs->cs_terminating = true; 1155 cv_signal(&cs->cs_maintenance_cv); 1156#ifdef ICL_KERNEL_PROXY 1157 cv_signal(&cs->cs_login_cv); 1158#endif 1159} 1160 1161static int 1162cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1163{ 1164 struct cfiscsi_target *ct; 1165 char *name; 1166 int i; 1167 1168 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1169 1170 ct = cs->cs_target; 1171 name = strdup(cs->cs_initiator_id, M_CTL); 1172 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1173 if (i < 0) { 1174 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1175 i); 1176 cs->cs_ctl_initid = -1; 1177 return (1); 1178 } 1179 cs->cs_ctl_initid = i; 1180#if 0 1181 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1182#endif 1183 1184 return (0); 1185} 1186 1187static void 1188cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1189{ 1190 int error; 1191 1192 if (cs->cs_ctl_initid == -1) 1193 return; 1194 1195 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1196 if (error != 0) { 1197 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1198 error); 1199 } 1200 cs->cs_ctl_initid = -1; 1201} 1202 1203static struct cfiscsi_session * 1204cfiscsi_session_new(struct cfiscsi_softc *softc) 1205{ 1206 struct cfiscsi_session *cs; 1207 int error; 1208 1209 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1210 if (cs == NULL) { 1211 CFISCSI_WARN("malloc failed"); 1212 return (NULL); 1213 } 1214 cs->cs_ctl_initid = -1; 1215 1216 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1217 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1218 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1219 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1220#ifdef ICL_KERNEL_PROXY 1221 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1222#endif 1223 1224 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1225 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1226 cs->cs_conn->ic_error = cfiscsi_error_callback; 1227 cs->cs_conn->ic_prv0 = cs; 1228 1229 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1230 if (error != 0) { 1231 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1232 free(cs, M_CFISCSI); 1233 return (NULL); 1234 } 1235 1236 mtx_lock(&softc->lock); 1237 cs->cs_id = ++softc->last_session_id; 1238 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1239 mtx_unlock(&softc->lock); 1240 1241 /* 1242 * Start pinging the initiator. 1243 */ 1244 callout_init(&cs->cs_callout, 1); 1245 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1246 1247 return (cs); 1248} 1249 1250static void 1251cfiscsi_session_delete(struct cfiscsi_session *cs) 1252{ 1253 struct cfiscsi_softc *softc; 1254 1255 softc = &cfiscsi_softc; 1256 1257 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1258 ("destroying session with outstanding CTL pdus")); 1259 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1260 ("destroying session with non-empty queue")); 1261 1262 cfiscsi_session_unregister_initiator(cs); 1263 if (cs->cs_target != NULL) 1264 cfiscsi_target_release(cs->cs_target); 1265 icl_conn_close(cs->cs_conn); 1266 icl_conn_free(cs->cs_conn); 1267 1268 mtx_lock(&softc->lock); 1269 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1270 cv_signal(&softc->sessions_cv); 1271 mtx_unlock(&softc->lock); 1272 1273 free(cs, M_CFISCSI); 1274} 1275 1276int 1277cfiscsi_init(void) 1278{ 1279 struct cfiscsi_softc *softc; 1280 1281 softc = &cfiscsi_softc; 1282 bzero(softc, sizeof(*softc)); 1283 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1284 1285 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1286#ifdef ICL_KERNEL_PROXY 1287 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1288#endif 1289 TAILQ_INIT(&softc->sessions); 1290 TAILQ_INIT(&softc->targets); 1291 1292 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1293 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1294 UMA_ALIGN_PTR, 0); 1295 1296 return (0); 1297} 1298 1299#ifdef ICL_KERNEL_PROXY 1300static void 1301cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1302{ 1303 struct cfiscsi_session *cs; 1304 1305 cs = cfiscsi_session_new(&cfiscsi_softc); 1306 if (cs == NULL) { 1307 CFISCSI_WARN("failed to create session"); 1308 return; 1309 } 1310 1311 icl_conn_handoff_sock(cs->cs_conn, so); 1312 cs->cs_initiator_sa = sa; 1313 cs->cs_portal_id = portal_id; 1314 cs->cs_waiting_for_ctld = true; 1315 cv_signal(&cfiscsi_softc.accept_cv); 1316} 1317#endif 1318 1319static void 1320cfiscsi_online(void *arg) 1321{ 1322 struct cfiscsi_softc *softc; 1323 struct cfiscsi_target *ct; 1324 int online; 1325 1326 ct = (struct cfiscsi_target *)arg; 1327 softc = ct->ct_softc; 1328 1329 mtx_lock(&softc->lock); 1330 if (ct->ct_online) { 1331 mtx_unlock(&softc->lock); 1332 return; 1333 } 1334 ct->ct_online = 1; 1335 online = softc->online++; 1336 mtx_unlock(&softc->lock); 1337 if (online > 0) 1338 return; 1339 1340#ifdef ICL_KERNEL_PROXY 1341 if (softc->listener != NULL) 1342 icl_listen_free(softc->listener); 1343 softc->listener = icl_listen_new(cfiscsi_accept); 1344#endif 1345} 1346 1347static void 1348cfiscsi_offline(void *arg) 1349{ 1350 struct cfiscsi_softc *softc; 1351 struct cfiscsi_target *ct; 1352 struct cfiscsi_session *cs; 1353 int online; 1354 1355 ct = (struct cfiscsi_target *)arg; 1356 softc = ct->ct_softc; 1357 1358 mtx_lock(&softc->lock); 1359 if (!ct->ct_online) { 1360 mtx_unlock(&softc->lock); 1361 return; 1362 } 1363 ct->ct_online = 0; 1364 online = --softc->online; 1365 1366 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1367 if (cs->cs_target == ct) 1368 cfiscsi_session_terminate(cs); 1369 } 1370 do { 1371 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1372 if (cs->cs_target == ct) 1373 break; 1374 } 1375 if (cs != NULL) 1376 cv_wait(&softc->sessions_cv, &softc->lock); 1377 } while (cs != NULL && ct->ct_online == 0); 1378 mtx_unlock(&softc->lock); 1379 if (online > 0) 1380 return; 1381 1382#ifdef ICL_KERNEL_PROXY 1383 icl_listen_free(softc->listener); 1384 softc->listener = NULL; 1385#endif 1386} 1387 1388static int 1389cfiscsi_info(void *arg, struct sbuf *sb) 1390{ 1391 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1392 int retval; 1393 1394 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1395 ct->ct_state); 1396 return (retval); 1397} 1398 1399static void 1400cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1401{ 1402 struct cfiscsi_softc *softc; 1403 struct cfiscsi_session *cs, *cs2; 1404 struct cfiscsi_target *ct; 1405 struct ctl_iscsi_handoff_params *cihp; 1406 int error; 1407 1408 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1409 softc = &cfiscsi_softc; 1410 1411 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1412 cihp->initiator_name, cihp->initiator_addr, 1413 cihp->target_name); 1414 1415 ct = cfiscsi_target_find(softc, cihp->target_name, 1416 cihp->portal_group_tag); 1417 if (ct == NULL) { 1418 ci->status = CTL_ISCSI_ERROR; 1419 snprintf(ci->error_str, sizeof(ci->error_str), 1420 "%s: target not found", __func__); 1421 return; 1422 } 1423 1424#ifdef ICL_KERNEL_PROXY 1425 if (cihp->socket > 0 && cihp->connection_id > 0) { 1426 snprintf(ci->error_str, sizeof(ci->error_str), 1427 "both socket and connection_id set"); 1428 ci->status = CTL_ISCSI_ERROR; 1429 cfiscsi_target_release(ct); 1430 return; 1431 } 1432 if (cihp->socket == 0) { 1433 mtx_lock(&cfiscsi_softc.lock); 1434 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1435 if (cs->cs_id == cihp->connection_id) 1436 break; 1437 } 1438 if (cs == NULL) { 1439 mtx_unlock(&cfiscsi_softc.lock); 1440 snprintf(ci->error_str, sizeof(ci->error_str), 1441 "connection not found"); 1442 ci->status = CTL_ISCSI_ERROR; 1443 cfiscsi_target_release(ct); 1444 return; 1445 } 1446 mtx_unlock(&cfiscsi_softc.lock); 1447 } else { 1448#endif 1449 cs = cfiscsi_session_new(softc); 1450 if (cs == NULL) { 1451 ci->status = CTL_ISCSI_ERROR; 1452 snprintf(ci->error_str, sizeof(ci->error_str), 1453 "%s: cfiscsi_session_new failed", __func__); 1454 cfiscsi_target_release(ct); 1455 return; 1456 } 1457#ifdef ICL_KERNEL_PROXY 1458 } 1459#endif 1460 1461 /* 1462 * First PDU of Full Feature phase has the same CmdSN as the last 1463 * PDU from the Login Phase received from the initiator. Thus, 1464 * the -1 below. 1465 */ 1466 cs->cs_cmdsn = cihp->cmdsn; 1467 cs->cs_statsn = cihp->statsn; 1468 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1469 cs->cs_max_burst_length = cihp->max_burst_length; 1470 cs->cs_immediate_data = !!cihp->immediate_data; 1471 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1472 cs->cs_conn->ic_header_crc32c = true; 1473 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1474 cs->cs_conn->ic_data_crc32c = true; 1475 1476 strlcpy(cs->cs_initiator_name, 1477 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1478 strlcpy(cs->cs_initiator_addr, 1479 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1480 strlcpy(cs->cs_initiator_alias, 1481 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1482 memcpy(cs->cs_initiator_isid, 1483 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1484 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1485 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1486 cihp->initiator_isid[0], cihp->initiator_isid[1], 1487 cihp->initiator_isid[2], cihp->initiator_isid[3], 1488 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1489 1490 mtx_lock(&softc->lock); 1491 if (ct->ct_online == 0) { 1492 mtx_unlock(&softc->lock); 1493 cfiscsi_session_terminate(cs); 1494 cfiscsi_target_release(ct); 1495 ci->status = CTL_ISCSI_ERROR; 1496 snprintf(ci->error_str, sizeof(ci->error_str), 1497 "%s: port offline", __func__); 1498 return; 1499 } 1500 cs->cs_target = ct; 1501 mtx_unlock(&softc->lock); 1502 1503 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1504restart: 1505 if (!cs->cs_terminating) { 1506 mtx_lock(&softc->lock); 1507 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1508 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1509 cs->cs_target == cs2->cs_target && 1510 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1511 if (strcmp(cs->cs_initiator_addr, 1512 cs2->cs_initiator_addr) != 0) { 1513 CFISCSI_SESSION_WARN(cs2, 1514 "session reinstatement from " 1515 "different address %s", 1516 cs->cs_initiator_addr); 1517 } else { 1518 CFISCSI_SESSION_DEBUG(cs2, 1519 "session reinstatement"); 1520 } 1521 cfiscsi_session_terminate(cs2); 1522 mtx_unlock(&softc->lock); 1523 pause("cfiscsi_reinstate", 1); 1524 goto restart; 1525 } 1526 } 1527 mtx_unlock(&softc->lock); 1528 } 1529 1530 /* 1531 * Register initiator with CTL. 1532 */ 1533 cfiscsi_session_register_initiator(cs); 1534 1535#ifdef ICL_KERNEL_PROXY 1536 if (cihp->socket > 0) { 1537#endif 1538 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1539 if (error != 0) { 1540 cfiscsi_session_terminate(cs); 1541 refcount_release(&cs->cs_outstanding_ctl_pdus); 1542 ci->status = CTL_ISCSI_ERROR; 1543 snprintf(ci->error_str, sizeof(ci->error_str), 1544 "%s: icl_conn_handoff failed with error %d", 1545 __func__, error); 1546 return; 1547 } 1548#ifdef ICL_KERNEL_PROXY 1549 } 1550#endif 1551 1552#ifdef ICL_KERNEL_PROXY 1553 cs->cs_login_phase = false; 1554 1555 /* 1556 * First PDU of the Full Feature phase has likely already arrived. 1557 * We have to pick it up and execute properly. 1558 */ 1559 if (cs->cs_login_pdu != NULL) { 1560 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1561 cfiscsi_pdu_handle(cs->cs_login_pdu); 1562 cs->cs_login_pdu = NULL; 1563 } 1564#endif 1565 1566 refcount_release(&cs->cs_outstanding_ctl_pdus); 1567 ci->status = CTL_ISCSI_OK; 1568} 1569 1570static void 1571cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1572{ 1573 struct ctl_iscsi_list_params *cilp; 1574 struct cfiscsi_session *cs; 1575 struct cfiscsi_softc *softc; 1576 struct sbuf *sb; 1577 int error; 1578 1579 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1580 softc = &cfiscsi_softc; 1581 1582 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1583 if (sb == NULL) { 1584 ci->status = CTL_ISCSI_ERROR; 1585 snprintf(ci->error_str, sizeof(ci->error_str), 1586 "Unable to allocate %d bytes for iSCSI session list", 1587 cilp->alloc_len); 1588 return; 1589 } 1590 1591 sbuf_printf(sb, "<ctlislist>\n"); 1592 mtx_lock(&softc->lock); 1593 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1594#ifdef ICL_KERNEL_PROXY 1595 if (cs->cs_target == NULL) 1596 continue; 1597#endif 1598 error = sbuf_printf(sb, "<connection id=\"%d\">" 1599 "<initiator>%s</initiator>" 1600 "<initiator_addr>%s</initiator_addr>" 1601 "<initiator_alias>%s</initiator_alias>" 1602 "<target>%s</target>" 1603 "<target_alias>%s</target_alias>" 1604 "<target_portal_group_tag>%u</target_portal_group_tag>" 1605 "<header_digest>%s</header_digest>" 1606 "<data_digest>%s</data_digest>" 1607 "<max_data_segment_length>%zd</max_data_segment_length>" 1608 "<immediate_data>%d</immediate_data>" 1609 "<iser>%d</iser>" 1610 "</connection>\n", 1611 cs->cs_id, 1612 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1613 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1614 cs->cs_target->ct_tag, 1615 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1616 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1617 cs->cs_max_data_segment_length, 1618 cs->cs_immediate_data, 1619 cs->cs_conn->ic_iser); 1620 if (error != 0) 1621 break; 1622 } 1623 mtx_unlock(&softc->lock); 1624 error = sbuf_printf(sb, "</ctlislist>\n"); 1625 if (error != 0) { 1626 sbuf_delete(sb); 1627 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1628 snprintf(ci->error_str, sizeof(ci->error_str), 1629 "Out of space, %d bytes is too small", cilp->alloc_len); 1630 return; 1631 } 1632 sbuf_finish(sb); 1633 1634 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1635 cilp->fill_len = sbuf_len(sb) + 1; 1636 ci->status = CTL_ISCSI_OK; 1637 sbuf_delete(sb); 1638} 1639 1640static void 1641cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1642{ 1643 struct icl_pdu *response; 1644 struct iscsi_bhs_asynchronous_message *bhsam; 1645 struct ctl_iscsi_logout_params *cilp; 1646 struct cfiscsi_session *cs; 1647 struct cfiscsi_softc *softc; 1648 int found = 0; 1649 1650 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1651 softc = &cfiscsi_softc; 1652 1653 mtx_lock(&softc->lock); 1654 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1655 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1656 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1657 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1658 continue; 1659 1660 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1661 if (response == NULL) { 1662 ci->status = CTL_ISCSI_ERROR; 1663 snprintf(ci->error_str, sizeof(ci->error_str), 1664 "Unable to allocate memory"); 1665 mtx_unlock(&softc->lock); 1666 return; 1667 } 1668 bhsam = 1669 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1670 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1671 bhsam->bhsam_flags = 0x80; 1672 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1673 bhsam->bhsam_parameter3 = htons(10); 1674 cfiscsi_pdu_queue(response); 1675 found++; 1676 } 1677 mtx_unlock(&softc->lock); 1678 1679 if (found == 0) { 1680 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1681 snprintf(ci->error_str, sizeof(ci->error_str), 1682 "No matching connections found"); 1683 return; 1684 } 1685 1686 ci->status = CTL_ISCSI_OK; 1687} 1688 1689static void 1690cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1691{ 1692 struct icl_pdu *response; 1693 struct iscsi_bhs_asynchronous_message *bhsam; 1694 struct ctl_iscsi_terminate_params *citp; 1695 struct cfiscsi_session *cs; 1696 struct cfiscsi_softc *softc; 1697 int found = 0; 1698 1699 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1700 softc = &cfiscsi_softc; 1701 1702 mtx_lock(&softc->lock); 1703 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1704 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1705 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1706 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1707 continue; 1708 1709 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1710 if (response == NULL) { 1711 /* 1712 * Oh well. Just terminate the connection. 1713 */ 1714 } else { 1715 bhsam = (struct iscsi_bhs_asynchronous_message *) 1716 response->ip_bhs; 1717 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1718 bhsam->bhsam_flags = 0x80; 1719 bhsam->bhsam_0xffffffff = 0xffffffff; 1720 bhsam->bhsam_async_event = 1721 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1722 cfiscsi_pdu_queue(response); 1723 } 1724 cfiscsi_session_terminate(cs); 1725 found++; 1726 } 1727 mtx_unlock(&softc->lock); 1728 1729 if (found == 0) { 1730 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1731 snprintf(ci->error_str, sizeof(ci->error_str), 1732 "No matching connections found"); 1733 return; 1734 } 1735 1736 ci->status = CTL_ISCSI_OK; 1737} 1738 1739#ifdef ICL_KERNEL_PROXY 1740static void 1741cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1742{ 1743 struct ctl_iscsi_listen_params *cilp; 1744 struct sockaddr *sa; 1745 int error; 1746 1747 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1748 1749 if (cfiscsi_softc.listener == NULL) { 1750 CFISCSI_DEBUG("no listener"); 1751 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1752 ci->status = CTL_ISCSI_ERROR; 1753 return; 1754 } 1755 1756 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1757 if (error != 0) { 1758 CFISCSI_DEBUG("getsockaddr, error %d", error); 1759 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1760 ci->status = CTL_ISCSI_ERROR; 1761 return; 1762 } 1763 1764 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1765 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1766 if (error != 0) { 1767 free(sa, M_SONAME); 1768 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1769 snprintf(ci->error_str, sizeof(ci->error_str), 1770 "icl_listen_add failed, error %d", error); 1771 ci->status = CTL_ISCSI_ERROR; 1772 return; 1773 } 1774 1775 ci->status = CTL_ISCSI_OK; 1776} 1777 1778static void 1779cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1780{ 1781 struct ctl_iscsi_accept_params *ciap; 1782 struct cfiscsi_session *cs; 1783 int error; 1784 1785 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1786 1787 mtx_lock(&cfiscsi_softc.lock); 1788 for (;;) { 1789 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1790 if (cs->cs_waiting_for_ctld) 1791 break; 1792 } 1793 if (cs != NULL) 1794 break; 1795 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1796 if (error != 0) { 1797 mtx_unlock(&cfiscsi_softc.lock); 1798 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1799 ci->status = CTL_ISCSI_ERROR; 1800 return; 1801 } 1802 } 1803 mtx_unlock(&cfiscsi_softc.lock); 1804 1805 cs->cs_waiting_for_ctld = false; 1806 cs->cs_login_phase = true; 1807 1808 ciap->connection_id = cs->cs_id; 1809 ciap->portal_id = cs->cs_portal_id; 1810 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1811 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1812 cs->cs_initiator_sa->sa_len); 1813 if (error != 0) { 1814 snprintf(ci->error_str, sizeof(ci->error_str), 1815 "copyout failed with error %d", error); 1816 ci->status = CTL_ISCSI_ERROR; 1817 return; 1818 } 1819 1820 ci->status = CTL_ISCSI_OK; 1821} 1822 1823static void 1824cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1825{ 1826 struct ctl_iscsi_send_params *cisp; 1827 struct cfiscsi_session *cs; 1828 struct icl_pdu *ip; 1829 size_t datalen; 1830 void *data; 1831 int error; 1832 1833 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1834 1835 mtx_lock(&cfiscsi_softc.lock); 1836 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1837 if (cs->cs_id == cisp->connection_id) 1838 break; 1839 } 1840 if (cs == NULL) { 1841 mtx_unlock(&cfiscsi_softc.lock); 1842 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1843 ci->status = CTL_ISCSI_ERROR; 1844 return; 1845 } 1846 mtx_unlock(&cfiscsi_softc.lock); 1847 1848#if 0 1849 if (cs->cs_login_phase == false) 1850 return (EBUSY); 1851#endif 1852 1853 if (cs->cs_terminating) { 1854 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1855 ci->status = CTL_ISCSI_ERROR; 1856 return; 1857 } 1858 1859 datalen = cisp->data_segment_len; 1860 /* 1861 * XXX 1862 */ 1863 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1864 if (datalen > 65535) { 1865 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1866 ci->status = CTL_ISCSI_ERROR; 1867 return; 1868 } 1869 if (datalen > 0) { 1870 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1871 error = copyin(cisp->data_segment, data, datalen); 1872 if (error != 0) { 1873 free(data, M_CFISCSI); 1874 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1875 ci->status = CTL_ISCSI_ERROR; 1876 return; 1877 } 1878 } 1879 1880 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1881 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1882 if (datalen > 0) { 1883 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1884 free(data, M_CFISCSI); 1885 } 1886 CFISCSI_SESSION_LOCK(cs); 1887 icl_pdu_queue(ip); 1888 CFISCSI_SESSION_UNLOCK(cs); 1889 ci->status = CTL_ISCSI_OK; 1890} 1891 1892static void 1893cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1894{ 1895 struct ctl_iscsi_receive_params *cirp; 1896 struct cfiscsi_session *cs; 1897 struct icl_pdu *ip; 1898 void *data; 1899 int error; 1900 1901 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1902 1903 mtx_lock(&cfiscsi_softc.lock); 1904 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1905 if (cs->cs_id == cirp->connection_id) 1906 break; 1907 } 1908 if (cs == NULL) { 1909 mtx_unlock(&cfiscsi_softc.lock); 1910 snprintf(ci->error_str, sizeof(ci->error_str), 1911 "connection not found"); 1912 ci->status = CTL_ISCSI_ERROR; 1913 return; 1914 } 1915 mtx_unlock(&cfiscsi_softc.lock); 1916 1917#if 0 1918 if (is->is_login_phase == false) 1919 return (EBUSY); 1920#endif 1921 1922 CFISCSI_SESSION_LOCK(cs); 1923 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1924 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1925 if (error != 0) { 1926 CFISCSI_SESSION_UNLOCK(cs); 1927 snprintf(ci->error_str, sizeof(ci->error_str), 1928 "interrupted by signal"); 1929 ci->status = CTL_ISCSI_ERROR; 1930 return; 1931 } 1932 } 1933 1934 if (cs->cs_terminating) { 1935 CFISCSI_SESSION_UNLOCK(cs); 1936 snprintf(ci->error_str, sizeof(ci->error_str), 1937 "connection terminating"); 1938 ci->status = CTL_ISCSI_ERROR; 1939 return; 1940 } 1941 ip = cs->cs_login_pdu; 1942 cs->cs_login_pdu = NULL; 1943 CFISCSI_SESSION_UNLOCK(cs); 1944 1945 if (ip->ip_data_len > cirp->data_segment_len) { 1946 icl_pdu_free(ip); 1947 snprintf(ci->error_str, sizeof(ci->error_str), 1948 "data segment too big"); 1949 ci->status = CTL_ISCSI_ERROR; 1950 return; 1951 } 1952 1953 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1954 if (ip->ip_data_len > 0) { 1955 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1956 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1957 copyout(data, cirp->data_segment, ip->ip_data_len); 1958 free(data, M_CFISCSI); 1959 } 1960 1961 icl_pdu_free(ip); 1962 ci->status = CTL_ISCSI_OK; 1963} 1964 1965#endif /* !ICL_KERNEL_PROXY */ 1966 1967static void 1968cfiscsi_ioctl_port_create(struct ctl_req *req) 1969{ 1970 struct cfiscsi_target *ct; 1971 struct ctl_port *port; 1972 const char *target, *alias, *tags; 1973 struct scsi_vpd_id_descriptor *desc; 1974 ctl_options_t opts; 1975 int retval, len, idlen; 1976 uint16_t tag; 1977 1978 ctl_init_opts(&opts, req->num_args, req->kern_args); 1979 target = ctl_get_opt(&opts, "cfiscsi_target"); 1980 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1981 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1982 if (target == NULL || tags == NULL) { 1983 req->status = CTL_LUN_ERROR; 1984 snprintf(req->error_str, sizeof(req->error_str), 1985 "Missing required argument"); 1986 ctl_free_opts(&opts); 1987 return; 1988 } 1989 tag = strtol(tags, (char **)NULL, 10); 1990 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 1991 if (ct == NULL) { 1992 req->status = CTL_LUN_ERROR; 1993 snprintf(req->error_str, sizeof(req->error_str), 1994 "failed to create target \"%s\"", target); 1995 ctl_free_opts(&opts); 1996 return; 1997 } 1998 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1999 req->status = CTL_LUN_ERROR; 2000 snprintf(req->error_str, sizeof(req->error_str), 2001 "target \"%s\" for portal group tag %u already exists", 2002 target, tag); 2003 cfiscsi_target_release(ct); 2004 ctl_free_opts(&opts); 2005 return; 2006 } 2007 port = &ct->ct_port; 2008 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2009 goto done; 2010 2011 port->frontend = &cfiscsi_frontend; 2012 port->port_type = CTL_PORT_ISCSI; 2013 /* XXX KDM what should the real number be here? */ 2014 port->num_requested_ctl_io = 4096; 2015 port->port_name = "iscsi"; 2016 port->physical_port = tag; 2017 port->virtual_port = ct->ct_target_id; 2018 port->port_online = cfiscsi_online; 2019 port->port_offline = cfiscsi_offline; 2020 port->port_info = cfiscsi_info; 2021 port->onoff_arg = ct; 2022 port->fe_datamove = cfiscsi_datamove; 2023 port->fe_done = cfiscsi_done; 2024 2025 /* XXX KDM what should we report here? */ 2026 /* XXX These should probably be fetched from CTL. */ 2027 port->max_targets = 1; 2028 port->max_target_id = 15; 2029 port->targ_port = -1; 2030 2031 port->options = opts; 2032 STAILQ_INIT(&opts); 2033 2034 /* Generate Port ID. */ 2035 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2036 idlen = roundup2(idlen, 4); 2037 len = sizeof(struct scsi_vpd_device_id) + idlen; 2038 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2039 M_CTL, M_WAITOK | M_ZERO); 2040 port->port_devid->len = len; 2041 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2042 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2043 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2044 SVPD_ID_TYPE_SCSI_NAME; 2045 desc->length = idlen; 2046 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2047 2048 /* Generate Target ID. */ 2049 idlen = strlen(target) + 1; 2050 idlen = roundup2(idlen, 4); 2051 len = sizeof(struct scsi_vpd_device_id) + idlen; 2052 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2053 M_CTL, M_WAITOK | M_ZERO); 2054 port->target_devid->len = len; 2055 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2056 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2057 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2058 SVPD_ID_TYPE_SCSI_NAME; 2059 desc->length = idlen; 2060 strlcpy(desc->identifier, target, idlen); 2061 2062 retval = ctl_port_register(port); 2063 if (retval != 0) { 2064 ctl_free_opts(&port->options); 2065 cfiscsi_target_release(ct); 2066 free(port->port_devid, M_CFISCSI); 2067 free(port->target_devid, M_CFISCSI); 2068 req->status = CTL_LUN_ERROR; 2069 snprintf(req->error_str, sizeof(req->error_str), 2070 "ctl_port_register() failed with error %d", retval); 2071 return; 2072 } 2073done: 2074 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2075 req->status = CTL_LUN_OK; 2076 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2077 sizeof(port->targ_port)); //XXX 2078} 2079 2080static void 2081cfiscsi_ioctl_port_remove(struct ctl_req *req) 2082{ 2083 struct cfiscsi_target *ct; 2084 const char *target, *tags; 2085 ctl_options_t opts; 2086 uint16_t tag; 2087 2088 ctl_init_opts(&opts, req->num_args, req->kern_args); 2089 target = ctl_get_opt(&opts, "cfiscsi_target"); 2090 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2091 if (target == NULL || tags == NULL) { 2092 ctl_free_opts(&opts); 2093 req->status = CTL_LUN_ERROR; 2094 snprintf(req->error_str, sizeof(req->error_str), 2095 "Missing required argument"); 2096 return; 2097 } 2098 tag = strtol(tags, (char **)NULL, 10); 2099 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2100 if (ct == NULL) { 2101 ctl_free_opts(&opts); 2102 req->status = CTL_LUN_ERROR; 2103 snprintf(req->error_str, sizeof(req->error_str), 2104 "can't find target \"%s\"", target); 2105 return; 2106 } 2107 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2108 ctl_free_opts(&opts); 2109 req->status = CTL_LUN_ERROR; 2110 snprintf(req->error_str, sizeof(req->error_str), 2111 "target \"%s\" is already dying", target); 2112 return; 2113 } 2114 ctl_free_opts(&opts); 2115 2116 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2117 ctl_port_offline(&ct->ct_port); 2118 cfiscsi_target_release(ct); 2119 cfiscsi_target_release(ct); 2120 req->status = CTL_LUN_OK; 2121} 2122 2123static int 2124cfiscsi_ioctl(struct cdev *dev, 2125 u_long cmd, caddr_t addr, int flag, struct thread *td) 2126{ 2127 struct ctl_iscsi *ci; 2128 struct ctl_req *req; 2129 2130 if (cmd == CTL_PORT_REQ) { 2131 req = (struct ctl_req *)addr; 2132 switch (req->reqtype) { 2133 case CTL_REQ_CREATE: 2134 cfiscsi_ioctl_port_create(req); 2135 break; 2136 case CTL_REQ_REMOVE: 2137 cfiscsi_ioctl_port_remove(req); 2138 break; 2139 default: 2140 req->status = CTL_LUN_ERROR; 2141 snprintf(req->error_str, sizeof(req->error_str), 2142 "Unsupported request type %d", req->reqtype); 2143 } 2144 return (0); 2145 } 2146 2147 if (cmd != CTL_ISCSI) 2148 return (ENOTTY); 2149 2150 ci = (struct ctl_iscsi *)addr; 2151 switch (ci->type) { 2152 case CTL_ISCSI_HANDOFF: 2153 cfiscsi_ioctl_handoff(ci); 2154 break; 2155 case CTL_ISCSI_LIST: 2156 cfiscsi_ioctl_list(ci); 2157 break; 2158 case CTL_ISCSI_LOGOUT: 2159 cfiscsi_ioctl_logout(ci); 2160 break; 2161 case CTL_ISCSI_TERMINATE: 2162 cfiscsi_ioctl_terminate(ci); 2163 break; 2164#ifdef ICL_KERNEL_PROXY 2165 case CTL_ISCSI_LISTEN: 2166 cfiscsi_ioctl_listen(ci); 2167 break; 2168 case CTL_ISCSI_ACCEPT: 2169 cfiscsi_ioctl_accept(ci); 2170 break; 2171 case CTL_ISCSI_SEND: 2172 cfiscsi_ioctl_send(ci); 2173 break; 2174 case CTL_ISCSI_RECEIVE: 2175 cfiscsi_ioctl_receive(ci); 2176 break; 2177#else 2178 case CTL_ISCSI_LISTEN: 2179 case CTL_ISCSI_ACCEPT: 2180 case CTL_ISCSI_SEND: 2181 case CTL_ISCSI_RECEIVE: 2182 ci->status = CTL_ISCSI_ERROR; 2183 snprintf(ci->error_str, sizeof(ci->error_str), 2184 "%s: CTL compiled without ICL_KERNEL_PROXY", 2185 __func__); 2186 break; 2187#endif /* !ICL_KERNEL_PROXY */ 2188 default: 2189 ci->status = CTL_ISCSI_ERROR; 2190 snprintf(ci->error_str, sizeof(ci->error_str), 2191 "%s: invalid iSCSI request type %d", __func__, ci->type); 2192 break; 2193 } 2194 2195 return (0); 2196} 2197 2198static void 2199cfiscsi_target_hold(struct cfiscsi_target *ct) 2200{ 2201 2202 refcount_acquire(&ct->ct_refcount); 2203} 2204 2205static void 2206cfiscsi_target_release(struct cfiscsi_target *ct) 2207{ 2208 struct cfiscsi_softc *softc; 2209 2210 softc = ct->ct_softc; 2211 mtx_lock(&softc->lock); 2212 if (refcount_release(&ct->ct_refcount)) { 2213 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2214 mtx_unlock(&softc->lock); 2215 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2216 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2217 if (ctl_port_deregister(&ct->ct_port) != 0) 2218 printf("%s: ctl_port_deregister() failed\n", 2219 __func__); 2220 } 2221 free(ct, M_CFISCSI); 2222 2223 return; 2224 } 2225 mtx_unlock(&softc->lock); 2226} 2227 2228static struct cfiscsi_target * 2229cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2230{ 2231 struct cfiscsi_target *ct; 2232 2233 mtx_lock(&softc->lock); 2234 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2235 if (ct->ct_tag != tag || 2236 strcmp(name, ct->ct_name) != 0 || 2237 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2238 continue; 2239 cfiscsi_target_hold(ct); 2240 mtx_unlock(&softc->lock); 2241 return (ct); 2242 } 2243 mtx_unlock(&softc->lock); 2244 2245 return (NULL); 2246} 2247 2248static struct cfiscsi_target * 2249cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2250 const char *alias, uint16_t tag) 2251{ 2252 struct cfiscsi_target *ct, *newct; 2253 2254 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2255 return (NULL); 2256 2257 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2258 2259 mtx_lock(&softc->lock); 2260 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2261 if (ct->ct_tag != tag || 2262 strcmp(name, ct->ct_name) != 0 || 2263 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2264 continue; 2265 cfiscsi_target_hold(ct); 2266 mtx_unlock(&softc->lock); 2267 free(newct, M_CFISCSI); 2268 return (ct); 2269 } 2270 2271 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2272 if (alias != NULL) 2273 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2274 newct->ct_tag = tag; 2275 refcount_init(&newct->ct_refcount, 1); 2276 newct->ct_softc = softc; 2277 if (TAILQ_EMPTY(&softc->targets)) 2278 softc->last_target_id = 0; 2279 newct->ct_target_id = ++softc->last_target_id; 2280 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2281 mtx_unlock(&softc->lock); 2282 2283 return (newct); 2284} 2285 2286static void 2287cfiscsi_datamove_in(union ctl_io *io) 2288{ 2289 struct cfiscsi_session *cs; 2290 struct icl_pdu *request, *response; 2291 const struct iscsi_bhs_scsi_command *bhssc; 2292 struct iscsi_bhs_data_in *bhsdi; 2293 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2294 size_t len, expected_len, sg_len, buffer_offset; 2295 const char *sg_addr; 2296 int ctl_sg_count, error, i; 2297 2298 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2299 cs = PDU_SESSION(request); 2300 2301 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2302 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2303 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2304 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2305 2306 if (io->scsiio.kern_sg_entries > 0) { 2307 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2308 ctl_sg_count = io->scsiio.kern_sg_entries; 2309 } else { 2310 ctl_sglist = &ctl_sg_entry; 2311 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2312 ctl_sglist->len = io->scsiio.kern_data_len; 2313 ctl_sg_count = 1; 2314 } 2315 2316 /* 2317 * This is the total amount of data to be transferred within the current 2318 * SCSI command. We need to record it so that we can properly report 2319 * underflow/underflow. 2320 */ 2321 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2322 2323 /* 2324 * This is the offset within the current SCSI command; for the first 2325 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2326 * it will be the sum of lengths of previous ones. 2327 */ 2328 buffer_offset = io->scsiio.kern_rel_offset; 2329 2330 /* 2331 * This is the transfer length expected by the initiator. In theory, 2332 * it could be different from the correct amount of data from the SCSI 2333 * point of view, even if that doesn't make any sense. 2334 */ 2335 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2336#if 0 2337 if (expected_len != io->scsiio.kern_total_len) { 2338 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2339 "actual length %zd", expected_len, 2340 (size_t)io->scsiio.kern_total_len); 2341 } 2342#endif 2343 2344 if (buffer_offset >= expected_len) { 2345#if 0 2346 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2347 "already sent the expected len", buffer_offset); 2348#endif 2349 io->scsiio.be_move_done(io); 2350 return; 2351 } 2352 2353 i = 0; 2354 sg_addr = NULL; 2355 sg_len = 0; 2356 response = NULL; 2357 bhsdi = NULL; 2358 for (;;) { 2359 if (response == NULL) { 2360 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2361 if (response == NULL) { 2362 CFISCSI_SESSION_WARN(cs, "failed to " 2363 "allocate memory; dropping connection"); 2364 ctl_set_busy(&io->scsiio); 2365 io->scsiio.be_move_done(io); 2366 cfiscsi_session_terminate(cs); 2367 return; 2368 } 2369 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2370 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2371 bhsdi->bhsdi_initiator_task_tag = 2372 bhssc->bhssc_initiator_task_tag; 2373 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2374 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2375 PDU_EXPDATASN(request)++; 2376 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2377 } 2378 2379 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2380 if (sg_len == 0) { 2381 sg_addr = ctl_sglist[i].addr; 2382 sg_len = ctl_sglist[i].len; 2383 KASSERT(sg_len > 0, ("sg_len <= 0")); 2384 } 2385 2386 len = sg_len; 2387 2388 /* 2389 * Truncate to maximum data segment length. 2390 */ 2391 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2392 ("ip_data_len %zd >= max_data_segment_length %zd", 2393 response->ip_data_len, cs->cs_max_data_segment_length)); 2394 if (response->ip_data_len + len > 2395 cs->cs_max_data_segment_length) { 2396 len = cs->cs_max_data_segment_length - 2397 response->ip_data_len; 2398 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2399 len, sg_len)); 2400 } 2401 2402 /* 2403 * Truncate to expected data transfer length. 2404 */ 2405 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2406 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2407 buffer_offset, response->ip_data_len, expected_len)); 2408 if (buffer_offset + response->ip_data_len + len > expected_len) { 2409 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2410 "to expected data transfer length %zd", 2411 buffer_offset + response->ip_data_len + len, expected_len); 2412 len = expected_len - (buffer_offset + response->ip_data_len); 2413 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2414 len, sg_len)); 2415 } 2416 2417 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2418 if (error != 0) { 2419 CFISCSI_SESSION_WARN(cs, "failed to " 2420 "allocate memory; dropping connection"); 2421 icl_pdu_free(response); 2422 ctl_set_busy(&io->scsiio); 2423 io->scsiio.be_move_done(io); 2424 cfiscsi_session_terminate(cs); 2425 return; 2426 } 2427 sg_addr += len; 2428 sg_len -= len; 2429 2430 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2431 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2432 buffer_offset, response->ip_data_len, expected_len)); 2433 if (buffer_offset + response->ip_data_len == expected_len) { 2434 /* 2435 * Already have the amount of data the initiator wanted. 2436 */ 2437 break; 2438 } 2439 2440 if (sg_len == 0) { 2441 /* 2442 * End of scatter-gather segment; 2443 * proceed to the next one... 2444 */ 2445 if (i == ctl_sg_count - 1) { 2446 /* 2447 * ... unless this was the last one. 2448 */ 2449 break; 2450 } 2451 i++; 2452 } 2453 2454 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2455 /* 2456 * Can't stuff more data into the current PDU; 2457 * queue it. Note that's not enough to check 2458 * for kern_data_resid == 0 instead; there 2459 * may be several Data-In PDUs for the final 2460 * call to cfiscsi_datamove(), and we want 2461 * to set the F flag only on the last of them. 2462 */ 2463 buffer_offset += response->ip_data_len; 2464 if (buffer_offset == io->scsiio.kern_total_len || 2465 buffer_offset == expected_len) { 2466 buffer_offset -= response->ip_data_len; 2467 break; 2468 } 2469 cfiscsi_pdu_queue(response); 2470 response = NULL; 2471 bhsdi = NULL; 2472 } 2473 } 2474 if (response != NULL) { 2475 buffer_offset += response->ip_data_len; 2476 if (buffer_offset == io->scsiio.kern_total_len || 2477 buffer_offset == expected_len) { 2478 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2479 if (io->io_hdr.status == CTL_SUCCESS) { 2480 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2481 if (PDU_TOTAL_TRANSFER_LEN(request) < 2482 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2483 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2484 bhsdi->bhsdi_residual_count = 2485 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2486 PDU_TOTAL_TRANSFER_LEN(request)); 2487 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2488 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2489 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2490 bhsdi->bhsdi_residual_count = 2491 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2492 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2493 } 2494 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2495 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2496 } 2497 } 2498 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2499 cfiscsi_pdu_queue(response); 2500 } 2501 2502 io->scsiio.be_move_done(io); 2503} 2504 2505static void 2506cfiscsi_datamove_out(union ctl_io *io) 2507{ 2508 struct cfiscsi_session *cs; 2509 struct icl_pdu *request, *response; 2510 const struct iscsi_bhs_scsi_command *bhssc; 2511 struct iscsi_bhs_r2t *bhsr2t; 2512 struct cfiscsi_data_wait *cdw; 2513 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2514 uint32_t expected_len, r2t_off, r2t_len; 2515 uint32_t target_transfer_tag; 2516 bool done; 2517 2518 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2519 cs = PDU_SESSION(request); 2520 2521 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2522 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2523 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2524 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2525 2526 /* 2527 * We need to record it so that we can properly report 2528 * underflow/underflow. 2529 */ 2530 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2531 2532 /* 2533 * Report write underflow as error since CTL and backends don't 2534 * really support it, and SCSI does not tell how to do it right. 2535 */ 2536 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2537 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2538 expected_len) { 2539 io->scsiio.io_hdr.port_status = 43; 2540 io->scsiio.be_move_done(io); 2541 return; 2542 } 2543 2544 target_transfer_tag = 2545 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2546 2547#if 0 2548 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2549 "task tag 0x%x, target transfer tag 0x%x", 2550 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2551#endif 2552 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2553 if (cdw == NULL) { 2554 CFISCSI_SESSION_WARN(cs, "failed to " 2555 "allocate memory; dropping connection"); 2556 ctl_set_busy(&io->scsiio); 2557 io->scsiio.be_move_done(io); 2558 cfiscsi_session_terminate(cs); 2559 return; 2560 } 2561 cdw->cdw_ctl_io = io; 2562 cdw->cdw_target_transfer_tag = target_transfer_tag; 2563 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2564 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2565 cdw->cdw_datasn = 0; 2566 2567 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2568 if (io->scsiio.kern_sg_entries > 0) { 2569 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2570 } else { 2571 ctl_sglist = &ctl_sg_entry; 2572 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2573 ctl_sglist->len = io->scsiio.kern_data_len; 2574 } 2575 cdw->cdw_sg_index = 0; 2576 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2577 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2578 r2t_off = io->scsiio.ext_data_filled; 2579 while (r2t_off > 0) { 2580 if (r2t_off >= cdw->cdw_sg_len) { 2581 r2t_off -= cdw->cdw_sg_len; 2582 cdw->cdw_sg_index++; 2583 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2584 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2585 continue; 2586 } 2587 cdw->cdw_sg_addr += r2t_off; 2588 cdw->cdw_sg_len -= r2t_off; 2589 r2t_off = 0; 2590 } 2591 2592 if (cs->cs_immediate_data && 2593 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2594 icl_pdu_data_segment_length(request)) { 2595 done = cfiscsi_handle_data_segment(request, cdw); 2596 if (done) { 2597 uma_zfree(cfiscsi_data_wait_zone, cdw); 2598 io->scsiio.be_move_done(io); 2599 return; 2600 } 2601 } 2602 2603 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2604 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2605 cs->cs_max_burst_length); 2606 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2607 2608 CFISCSI_SESSION_LOCK(cs); 2609 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2610 CFISCSI_SESSION_UNLOCK(cs); 2611 2612 /* 2613 * XXX: We should limit the number of outstanding R2T PDUs 2614 * per task to MaxOutstandingR2T. 2615 */ 2616 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2617 if (response == NULL) { 2618 CFISCSI_SESSION_WARN(cs, "failed to " 2619 "allocate memory; dropping connection"); 2620 ctl_set_busy(&io->scsiio); 2621 io->scsiio.be_move_done(io); 2622 cfiscsi_session_terminate(cs); 2623 return; 2624 } 2625 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2626 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2627 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2628 bhsr2t->bhsr2t_flags = 0x80; 2629 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2630 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2631 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2632 /* 2633 * XXX: Here we assume that cfiscsi_datamove() won't ever 2634 * be running concurrently on several CPUs for a given 2635 * command. 2636 */ 2637 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2638 PDU_R2TSN(request)++; 2639 /* 2640 * This is the offset within the current SCSI command; 2641 * i.e. for the first call of datamove(), it will be 0, 2642 * and for subsequent ones it will be the sum of lengths 2643 * of previous ones. 2644 * 2645 * The ext_data_filled is to account for unsolicited 2646 * (immediate) data that might have already arrived. 2647 */ 2648 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2649 /* 2650 * This is the total length (sum of S/G lengths) this call 2651 * to cfiscsi_datamove() is supposed to handle, limited by 2652 * MaxBurstLength. 2653 */ 2654 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2655 cfiscsi_pdu_queue(response); 2656} 2657 2658static void 2659cfiscsi_datamove(union ctl_io *io) 2660{ 2661 2662 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2663 cfiscsi_datamove_in(io); 2664 else { 2665 /* We hadn't received anything during this datamove yet. */ 2666 io->scsiio.ext_data_filled = 0; 2667 cfiscsi_datamove_out(io); 2668 } 2669} 2670 2671static void 2672cfiscsi_scsi_command_done(union ctl_io *io) 2673{ 2674 struct icl_pdu *request, *response; 2675 struct iscsi_bhs_scsi_command *bhssc; 2676 struct iscsi_bhs_scsi_response *bhssr; 2677#ifdef DIAGNOSTIC 2678 struct cfiscsi_data_wait *cdw; 2679#endif 2680 struct cfiscsi_session *cs; 2681 uint16_t sense_length; 2682 2683 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2684 cs = PDU_SESSION(request); 2685 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2686 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2687 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2688 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2689 2690 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2691 // bhssc->bhssc_initiator_task_tag); 2692 2693#ifdef DIAGNOSTIC 2694 CFISCSI_SESSION_LOCK(cs); 2695 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2696 KASSERT(bhssc->bhssc_initiator_task_tag != 2697 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2698 CFISCSI_SESSION_UNLOCK(cs); 2699#endif 2700 2701 /* 2702 * Do not return status for aborted commands. 2703 * There are exceptions, but none supported by CTL yet. 2704 */ 2705 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2706 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2707 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2708 ctl_free_io(io); 2709 icl_pdu_free(request); 2710 return; 2711 } 2712 2713 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2714 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2715 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2716 bhssr->bhssr_flags = 0x80; 2717 /* 2718 * XXX: We don't deal with bidirectional under/overflows; 2719 * does anything actually support those? 2720 */ 2721 if (PDU_TOTAL_TRANSFER_LEN(request) < 2722 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2723 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2724 bhssr->bhssr_residual_count = 2725 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2726 PDU_TOTAL_TRANSFER_LEN(request)); 2727 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2728 // ntohl(bhssr->bhssr_residual_count)); 2729 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2730 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2731 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2732 bhssr->bhssr_residual_count = 2733 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2734 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2735 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2736 // ntohl(bhssr->bhssr_residual_count)); 2737 } 2738 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2739 bhssr->bhssr_status = io->scsiio.scsi_status; 2740 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2741 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2742 2743 if (io->scsiio.sense_len > 0) { 2744#if 0 2745 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2746 io->scsiio.sense_len); 2747#endif 2748 sense_length = htons(io->scsiio.sense_len); 2749 icl_pdu_append_data(response, 2750 &sense_length, sizeof(sense_length), M_WAITOK); 2751 icl_pdu_append_data(response, 2752 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2753 } 2754 2755 ctl_free_io(io); 2756 icl_pdu_free(request); 2757 cfiscsi_pdu_queue(response); 2758} 2759 2760static void 2761cfiscsi_task_management_done(union ctl_io *io) 2762{ 2763 struct icl_pdu *request, *response; 2764 struct iscsi_bhs_task_management_request *bhstmr; 2765 struct iscsi_bhs_task_management_response *bhstmr2; 2766 struct cfiscsi_data_wait *cdw, *tmpcdw; 2767 struct cfiscsi_session *cs, *tcs; 2768 struct cfiscsi_softc *softc; 2769 int cold_reset = 0; 2770 2771 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2772 cs = PDU_SESSION(request); 2773 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2774 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2775 ISCSI_BHS_OPCODE_TASK_REQUEST, 2776 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2777 2778#if 0 2779 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2780 bhstmr->bhstmr_initiator_task_tag, 2781 bhstmr->bhstmr_referenced_task_tag); 2782#endif 2783 2784 if ((bhstmr->bhstmr_function & ~0x80) == 2785 BHSTMR_FUNCTION_ABORT_TASK) { 2786 /* 2787 * Make sure we no longer wait for Data-Out for this command. 2788 */ 2789 CFISCSI_SESSION_LOCK(cs); 2790 TAILQ_FOREACH_SAFE(cdw, 2791 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2792 if (bhstmr->bhstmr_referenced_task_tag != 2793 cdw->cdw_initiator_task_tag) 2794 continue; 2795 2796#if 0 2797 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2798 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2799#endif 2800 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2801 cdw, cdw_next); 2802 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2803 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2804 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2805 uma_zfree(cfiscsi_data_wait_zone, cdw); 2806 } 2807 CFISCSI_SESSION_UNLOCK(cs); 2808 } 2809 if ((bhstmr->bhstmr_function & ~0x80) == 2810 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2811 io->io_hdr.status == CTL_SUCCESS) 2812 cold_reset = 1; 2813 2814 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2815 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2816 response->ip_bhs; 2817 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2818 bhstmr2->bhstmr_flags = 0x80; 2819 switch (io->taskio.task_status) { 2820 case CTL_TASK_FUNCTION_COMPLETE: 2821 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2822 break; 2823 case CTL_TASK_FUNCTION_SUCCEEDED: 2824 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2825 break; 2826 case CTL_TASK_LUN_DOES_NOT_EXIST: 2827 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2828 break; 2829 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2830 default: 2831 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2832 break; 2833 } 2834 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2835 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2836 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2837 2838 ctl_free_io(io); 2839 icl_pdu_free(request); 2840 cfiscsi_pdu_queue(response); 2841 2842 if (cold_reset) { 2843 softc = cs->cs_target->ct_softc; 2844 mtx_lock(&softc->lock); 2845 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2846 if (tcs->cs_target == cs->cs_target) 2847 cfiscsi_session_terminate(tcs); 2848 } 2849 mtx_unlock(&softc->lock); 2850 } 2851} 2852 2853static void 2854cfiscsi_done(union ctl_io *io) 2855{ 2856 struct icl_pdu *request; 2857 struct cfiscsi_session *cs; 2858 2859 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2860 ("invalid CTL status %#x", io->io_hdr.status)); 2861 2862 if (io->io_hdr.io_type == CTL_IO_TASK && 2863 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2864 /* 2865 * Implicit task termination has just completed; nothing to do. 2866 */ 2867 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2868 cs->cs_tasks_aborted = true; 2869 refcount_release(&cs->cs_outstanding_ctl_pdus); 2870 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2871 ctl_free_io(io); 2872 return; 2873 } 2874 2875 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2876 cs = PDU_SESSION(request); 2877 refcount_release(&cs->cs_outstanding_ctl_pdus); 2878 2879 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2880 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2881 cfiscsi_scsi_command_done(io); 2882 break; 2883 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2884 cfiscsi_task_management_done(io); 2885 break; 2886 default: 2887 panic("cfiscsi_done called with wrong opcode 0x%x", 2888 request->ip_bhs->bhs_opcode); 2889 } 2890} 2891