ctl_frontend_iscsi.c revision 360864
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 360864 2020-05-10 02:14:23Z 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 360864 2020-05-10 02:14:23Z 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(cfiscsi, cfiscsi_frontend); 188MODULE_DEPEND(cfiscsi, icl, 1, 1, 1); 189 190static struct icl_pdu * 191cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 192{ 193 194 return (icl_pdu_new(request->ip_conn, flags)); 195} 196 197static bool 198cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 199{ 200 const struct iscsi_bhs_scsi_command *bhssc; 201 struct cfiscsi_session *cs; 202 uint32_t cmdsn, expstatsn; 203 204 cs = PDU_SESSION(request); 205 206 /* 207 * Every incoming PDU - not just NOP-Out - resets the ping timer. 208 * The purpose of the timeout is to reset the connection when it stalls; 209 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 210 * in some queue. 211 * 212 * XXX: Locking? 213 */ 214 cs->cs_timeout = 0; 215 216 /* 217 * Data-Out PDUs don't contain CmdSN. 218 */ 219 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 220 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 221 return (false); 222 223 /* 224 * We're only using fields common for all the request 225 * (initiator -> target) PDUs. 226 */ 227 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 228 cmdsn = ntohl(bhssc->bhssc_cmdsn); 229 expstatsn = ntohl(bhssc->bhssc_expstatsn); 230 231 CFISCSI_SESSION_LOCK(cs); 232#if 0 233 if (expstatsn != cs->cs_statsn) { 234 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 235 "while current StatSN is %d", expstatsn, 236 cs->cs_statsn); 237 } 238#endif 239 240 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 241 /* 242 * The target MUST silently ignore any non-immediate command 243 * outside of this range. 244 */ 245 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 246 ISCSI_SNGT(cmdsn, cs->cs_cmdsn - 1 + maxtags)) { 247 CFISCSI_SESSION_UNLOCK(cs); 248 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 249 "while expected %u", cmdsn, cs->cs_cmdsn); 250 return (true); 251 } 252 253 /* 254 * We don't support multiple connections now, so any 255 * discontinuity in CmdSN means lost PDUs. Since we don't 256 * support PDU retransmission -- terminate the connection. 257 */ 258 if (cmdsn != cs->cs_cmdsn) { 259 CFISCSI_SESSION_UNLOCK(cs); 260 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 261 "while expected %u; dropping connection", 262 cmdsn, cs->cs_cmdsn); 263 cfiscsi_session_terminate(cs); 264 return (true); 265 } 266 cs->cs_cmdsn++; 267 } 268 269 CFISCSI_SESSION_UNLOCK(cs); 270 271 return (false); 272} 273 274static void 275cfiscsi_pdu_handle(struct icl_pdu *request) 276{ 277 struct cfiscsi_session *cs; 278 bool ignore; 279 280 cs = PDU_SESSION(request); 281 282 ignore = cfiscsi_pdu_update_cmdsn(request); 283 if (ignore) { 284 icl_pdu_free(request); 285 return; 286 } 287 288 /* 289 * Handle the PDU; this includes e.g. receiving the remaining 290 * part of PDU and submitting the SCSI command to CTL 291 * or queueing a reply. The handling routine is responsible 292 * for freeing the PDU when it's no longer needed. 293 */ 294 switch (request->ip_bhs->bhs_opcode & 295 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 296 case ISCSI_BHS_OPCODE_NOP_OUT: 297 cfiscsi_pdu_handle_nop_out(request); 298 break; 299 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 300 cfiscsi_pdu_handle_scsi_command(request); 301 break; 302 case ISCSI_BHS_OPCODE_TASK_REQUEST: 303 cfiscsi_pdu_handle_task_request(request); 304 break; 305 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 306 cfiscsi_pdu_handle_data_out(request); 307 break; 308 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 309 cfiscsi_pdu_handle_logout_request(request); 310 break; 311 default: 312 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 313 "opcode 0x%x; dropping connection", 314 request->ip_bhs->bhs_opcode); 315 icl_pdu_free(request); 316 cfiscsi_session_terminate(cs); 317 } 318 319} 320 321static void 322cfiscsi_receive_callback(struct icl_pdu *request) 323{ 324#ifdef ICL_KERNEL_PROXY 325 struct cfiscsi_session *cs; 326 327 cs = PDU_SESSION(request); 328 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 329 if (cs->cs_login_pdu == NULL) 330 cs->cs_login_pdu = request; 331 else 332 icl_pdu_free(request); 333 cv_signal(&cs->cs_login_cv); 334 return; 335 } 336#endif 337 338 cfiscsi_pdu_handle(request); 339} 340 341static void 342cfiscsi_error_callback(struct icl_conn *ic) 343{ 344 struct cfiscsi_session *cs; 345 346 cs = CONN_SESSION(ic); 347 348 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 349 cfiscsi_session_terminate(cs); 350} 351 352static int 353cfiscsi_pdu_prepare(struct icl_pdu *response) 354{ 355 struct cfiscsi_session *cs; 356 struct iscsi_bhs_scsi_response *bhssr; 357 bool advance_statsn = true; 358 359 cs = PDU_SESSION(response); 360 361 CFISCSI_SESSION_LOCK_ASSERT(cs); 362 363 /* 364 * We're only using fields common for all the response 365 * (target -> initiator) PDUs. 366 */ 367 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 368 369 /* 370 * 10.8.3: "The StatSN for this connection is not advanced 371 * after this PDU is sent." 372 */ 373 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 374 advance_statsn = false; 375 376 /* 377 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 378 * StatSN for the connection is not advanced after this PDU is sent." 379 */ 380 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 381 bhssr->bhssr_initiator_task_tag == 0xffffffff) 382 advance_statsn = false; 383 384 /* 385 * See the comment below - StatSN is not meaningful and must 386 * not be advanced. 387 */ 388 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 389 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 390 advance_statsn = false; 391 392 /* 393 * 10.7.3: "The fields StatSN, Status, and Residual Count 394 * only have meaningful content if the S bit is set to 1." 395 */ 396 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 397 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 398 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 399 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 400 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn - 1 + 401 imax(0, maxtags - cs->cs_outstanding_ctl_pdus)); 402 403 if (advance_statsn) 404 cs->cs_statsn++; 405 406 return (0); 407} 408 409static void 410cfiscsi_pdu_queue(struct icl_pdu *response) 411{ 412 struct cfiscsi_session *cs; 413 414 cs = PDU_SESSION(response); 415 416 CFISCSI_SESSION_LOCK(cs); 417 cfiscsi_pdu_prepare(response); 418 icl_pdu_queue(response); 419 CFISCSI_SESSION_UNLOCK(cs); 420} 421 422static void 423cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 424{ 425 struct cfiscsi_session *cs; 426 struct iscsi_bhs_nop_out *bhsno; 427 struct iscsi_bhs_nop_in *bhsni; 428 struct icl_pdu *response; 429 void *data = NULL; 430 size_t datasize; 431 int error; 432 433 cs = PDU_SESSION(request); 434 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 435 436 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 437 /* 438 * Nothing to do, iscsi_pdu_update_statsn() already 439 * zeroed the timeout. 440 */ 441 icl_pdu_free(request); 442 return; 443 } 444 445 datasize = icl_pdu_data_segment_length(request); 446 if (datasize > 0) { 447 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 448 if (data == NULL) { 449 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 450 "dropping connection"); 451 icl_pdu_free(request); 452 cfiscsi_session_terminate(cs); 453 return; 454 } 455 icl_pdu_get_data(request, 0, data, datasize); 456 } 457 458 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 459 if (response == NULL) { 460 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 461 "droppping connection"); 462 free(data, M_CFISCSI); 463 icl_pdu_free(request); 464 cfiscsi_session_terminate(cs); 465 return; 466 } 467 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 468 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 469 bhsni->bhsni_flags = 0x80; 470 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 471 bhsni->bhsni_target_transfer_tag = 0xffffffff; 472 if (datasize > 0) { 473 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 474 if (error != 0) { 475 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 476 "dropping connection"); 477 free(data, M_CFISCSI); 478 icl_pdu_free(request); 479 icl_pdu_free(response); 480 cfiscsi_session_terminate(cs); 481 return; 482 } 483 free(data, M_CFISCSI); 484 } 485 486 icl_pdu_free(request); 487 cfiscsi_pdu_queue(response); 488} 489 490static void 491cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 492{ 493 struct iscsi_bhs_scsi_command *bhssc; 494 struct cfiscsi_session *cs; 495 union ctl_io *io; 496 int error; 497 498 cs = PDU_SESSION(request); 499 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 500 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 501 // bhssc->bhssc_initiator_task_tag); 502 503 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 504 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 505 "ImmediateData=No; dropping connection"); 506 icl_pdu_free(request); 507 cfiscsi_session_terminate(cs); 508 return; 509 } 510 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 511 ctl_zero_io(io); 512 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 513 io->io_hdr.io_type = CTL_IO_SCSI; 514 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 515 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 516 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 517 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 518 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 519 case BHSSC_FLAGS_ATTR_UNTAGGED: 520 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 521 break; 522 case BHSSC_FLAGS_ATTR_SIMPLE: 523 io->scsiio.tag_type = CTL_TAG_SIMPLE; 524 break; 525 case BHSSC_FLAGS_ATTR_ORDERED: 526 io->scsiio.tag_type = CTL_TAG_ORDERED; 527 break; 528 case BHSSC_FLAGS_ATTR_HOQ: 529 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 530 break; 531 case BHSSC_FLAGS_ATTR_ACA: 532 io->scsiio.tag_type = CTL_TAG_ACA; 533 break; 534 default: 535 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 536 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 537 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 538 break; 539 } 540 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 541 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 542 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 543 error = ctl_queue(io); 544 if (error != CTL_RETVAL_COMPLETE) { 545 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 546 "dropping connection", error); 547 ctl_free_io(io); 548 refcount_release(&cs->cs_outstanding_ctl_pdus); 549 icl_pdu_free(request); 550 cfiscsi_session_terminate(cs); 551 } 552} 553 554static void 555cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 556{ 557 struct iscsi_bhs_task_management_request *bhstmr; 558 struct iscsi_bhs_task_management_response *bhstmr2; 559 struct icl_pdu *response; 560 struct cfiscsi_session *cs; 561 union ctl_io *io; 562 int error; 563 564 cs = PDU_SESSION(request); 565 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 566 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 567 ctl_zero_io(io); 568 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 569 io->io_hdr.io_type = CTL_IO_TASK; 570 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 571 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 572 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 573 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 574 575 switch (bhstmr->bhstmr_function & ~0x80) { 576 case BHSTMR_FUNCTION_ABORT_TASK: 577#if 0 578 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 579#endif 580 io->taskio.task_action = CTL_TASK_ABORT_TASK; 581 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 582 break; 583 case BHSTMR_FUNCTION_ABORT_TASK_SET: 584#if 0 585 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 586#endif 587 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 588 break; 589 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 590#if 0 591 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 592#endif 593 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 594 break; 595 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 596#if 0 597 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 598#endif 599 io->taskio.task_action = CTL_TASK_LUN_RESET; 600 break; 601 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 602#if 0 603 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 604#endif 605 io->taskio.task_action = CTL_TASK_TARGET_RESET; 606 break; 607 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 608#if 0 609 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 610#endif 611 io->taskio.task_action = CTL_TASK_TARGET_RESET; 612 break; 613 case BHSTMR_FUNCTION_QUERY_TASK: 614#if 0 615 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 616#endif 617 io->taskio.task_action = CTL_TASK_QUERY_TASK; 618 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 619 break; 620 case BHSTMR_FUNCTION_QUERY_TASK_SET: 621#if 0 622 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 623#endif 624 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 625 break; 626 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 627#if 0 628 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 629#endif 630 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 631 break; 632 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 633#if 0 634 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 635#endif 636 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 637 break; 638 default: 639 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 640 bhstmr->bhstmr_function & ~0x80); 641 ctl_free_io(io); 642 643 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 644 if (response == NULL) { 645 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 646 "dropping connection"); 647 icl_pdu_free(request); 648 cfiscsi_session_terminate(cs); 649 return; 650 } 651 bhstmr2 = (struct iscsi_bhs_task_management_response *) 652 response->ip_bhs; 653 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 654 bhstmr2->bhstmr_flags = 0x80; 655 bhstmr2->bhstmr_response = 656 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 657 bhstmr2->bhstmr_initiator_task_tag = 658 bhstmr->bhstmr_initiator_task_tag; 659 icl_pdu_free(request); 660 cfiscsi_pdu_queue(response); 661 return; 662 } 663 664 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 665 error = ctl_queue(io); 666 if (error != CTL_RETVAL_COMPLETE) { 667 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 668 "dropping connection", error); 669 ctl_free_io(io); 670 refcount_release(&cs->cs_outstanding_ctl_pdus); 671 icl_pdu_free(request); 672 cfiscsi_session_terminate(cs); 673 } 674} 675 676static bool 677cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 678{ 679 struct iscsi_bhs_data_out *bhsdo; 680 struct cfiscsi_session *cs; 681 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 682 size_t copy_len, len, off, buffer_offset; 683 int ctl_sg_count; 684 union ctl_io *io; 685 686 cs = PDU_SESSION(request); 687 688 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 689 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 690 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 691 ISCSI_BHS_OPCODE_SCSI_COMMAND, 692 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 693 694 /* 695 * We're only using fields common for Data-Out and SCSI Command PDUs. 696 */ 697 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 698 699 io = cdw->cdw_ctl_io; 700 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 701 ("CTL_FLAG_DATA_IN")); 702 703#if 0 704 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 705 request->ip_data_len, io->scsiio.kern_total_len); 706#endif 707 708 if (io->scsiio.kern_sg_entries > 0) { 709 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 710 ctl_sg_count = io->scsiio.kern_sg_entries; 711 } else { 712 ctl_sglist = &ctl_sg_entry; 713 ctl_sglist->addr = io->scsiio.kern_data_ptr; 714 ctl_sglist->len = io->scsiio.kern_data_len; 715 ctl_sg_count = 1; 716 } 717 718 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 719 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 720 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 721 else 722 buffer_offset = 0; 723 len = icl_pdu_data_segment_length(request); 724 725 /* 726 * Make sure the offset, as sent by the initiator, matches the offset 727 * we're supposed to be at in the scatter-gather list. 728 */ 729 if (buffer_offset > 730 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 731 buffer_offset + len <= 732 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 733 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 734 "expected %zd; dropping connection", buffer_offset, 735 (size_t)io->scsiio.kern_rel_offset + 736 (size_t)io->scsiio.ext_data_filled); 737 ctl_set_data_phase_error(&io->scsiio); 738 cfiscsi_session_terminate(cs); 739 return (true); 740 } 741 742 /* 743 * This is the offset within the PDU data segment, as opposed 744 * to buffer_offset, which is the offset within the task (SCSI 745 * command). 746 */ 747 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 748 buffer_offset; 749 750 /* 751 * Iterate over the scatter/gather segments, filling them with data 752 * from the PDU data segment. Note that this can get called multiple 753 * times for one SCSI command; the cdw structure holds state for the 754 * scatter/gather list. 755 */ 756 for (;;) { 757 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 758 ("cdw->cdw_sg_index >= ctl_sg_count")); 759 if (cdw->cdw_sg_len == 0) { 760 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 761 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 762 } 763 KASSERT(off <= len, ("len > off")); 764 copy_len = len - off; 765 if (copy_len > cdw->cdw_sg_len) 766 copy_len = cdw->cdw_sg_len; 767 768 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 769 cdw->cdw_sg_addr += copy_len; 770 cdw->cdw_sg_len -= copy_len; 771 off += copy_len; 772 io->scsiio.ext_data_filled += copy_len; 773 io->scsiio.kern_data_resid -= copy_len; 774 775 if (cdw->cdw_sg_len == 0) { 776 /* 777 * End of current segment. 778 */ 779 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 780 /* 781 * Last segment in scatter/gather list. 782 */ 783 break; 784 } 785 cdw->cdw_sg_index++; 786 } 787 788 if (off == len) { 789 /* 790 * End of PDU payload. 791 */ 792 break; 793 } 794 } 795 796 if (len > off) { 797 /* 798 * In case of unsolicited data, it's possible that the buffer 799 * provided by CTL is smaller than negotiated FirstBurstLength. 800 * Just ignore the superfluous data; will ask for them with R2T 801 * on next call to cfiscsi_datamove(). 802 * 803 * This obviously can only happen with SCSI Command PDU. 804 */ 805 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 806 ISCSI_BHS_OPCODE_SCSI_COMMAND) 807 return (true); 808 809 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 810 "expected %zd; dropping connection", 811 icl_pdu_data_segment_length(request), off); 812 ctl_set_data_phase_error(&io->scsiio); 813 cfiscsi_session_terminate(cs); 814 return (true); 815 } 816 817 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 818 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 819 CFISCSI_SESSION_WARN(cs, "got the final packet without " 820 "the F flag; flags = 0x%x; dropping connection", 821 bhsdo->bhsdo_flags); 822 ctl_set_data_phase_error(&io->scsiio); 823 cfiscsi_session_terminate(cs); 824 return (true); 825 } 826 827 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 828 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 829 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 830 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 831 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 832 "transmitted size was %zd bytes instead of %d; " 833 "dropping connection", 834 (size_t)io->scsiio.ext_data_filled, 835 cdw->cdw_r2t_end); 836 ctl_set_data_phase_error(&io->scsiio); 837 cfiscsi_session_terminate(cs); 838 return (true); 839 } else { 840 /* 841 * For SCSI Command PDU, this just means we need to 842 * solicit more data by sending R2T. 843 */ 844 return (false); 845 } 846 } 847 848 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 849#if 0 850 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 851 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 852#endif 853 854 return (true); 855 } 856 857 return (false); 858} 859 860static void 861cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 862{ 863 struct iscsi_bhs_data_out *bhsdo; 864 struct cfiscsi_session *cs; 865 struct cfiscsi_data_wait *cdw = NULL; 866 union ctl_io *io; 867 bool done; 868 869 cs = PDU_SESSION(request); 870 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 871 872 CFISCSI_SESSION_LOCK(cs); 873 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 874#if 0 875 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 876 "ttt 0x%x, itt 0x%x", 877 bhsdo->bhsdo_target_transfer_tag, 878 bhsdo->bhsdo_initiator_task_tag, 879 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 880#endif 881 if (bhsdo->bhsdo_target_transfer_tag == 882 cdw->cdw_target_transfer_tag) 883 break; 884 } 885 CFISCSI_SESSION_UNLOCK(cs); 886 if (cdw == NULL) { 887 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 888 "0x%x, not found; dropping connection", 889 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 890 icl_pdu_free(request); 891 cfiscsi_session_terminate(cs); 892 return; 893 } 894 895 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 896 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 897 "DataSN %u, while expected %u; dropping connection", 898 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 899 icl_pdu_free(request); 900 cfiscsi_session_terminate(cs); 901 return; 902 } 903 cdw->cdw_datasn++; 904 905 io = cdw->cdw_ctl_io; 906 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 907 ("CTL_FLAG_DATA_IN")); 908 909 done = cfiscsi_handle_data_segment(request, cdw); 910 if (done) { 911 CFISCSI_SESSION_LOCK(cs); 912 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 913 CFISCSI_SESSION_UNLOCK(cs); 914 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 915 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 916 cfiscsi_data_wait_free(cs, cdw); 917 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 918 if (done) 919 io->scsiio.be_move_done(io); 920 else 921 cfiscsi_datamove_out(io); 922 } 923 924 icl_pdu_free(request); 925} 926 927static void 928cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 929{ 930 struct iscsi_bhs_logout_request *bhslr; 931 struct iscsi_bhs_logout_response *bhslr2; 932 struct icl_pdu *response; 933 struct cfiscsi_session *cs; 934 935 cs = PDU_SESSION(request); 936 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 937 switch (bhslr->bhslr_reason & 0x7f) { 938 case BHSLR_REASON_CLOSE_SESSION: 939 case BHSLR_REASON_CLOSE_CONNECTION: 940 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 941 if (response == NULL) { 942 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 943 icl_pdu_free(request); 944 cfiscsi_session_terminate(cs); 945 return; 946 } 947 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 948 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 949 bhslr2->bhslr_flags = 0x80; 950 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 951 bhslr2->bhslr_initiator_task_tag = 952 bhslr->bhslr_initiator_task_tag; 953 icl_pdu_free(request); 954 cfiscsi_pdu_queue(response); 955 cfiscsi_session_terminate(cs); 956 break; 957 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 958 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 959 if (response == NULL) { 960 CFISCSI_SESSION_WARN(cs, 961 "failed to allocate memory; dropping connection"); 962 icl_pdu_free(request); 963 cfiscsi_session_terminate(cs); 964 return; 965 } 966 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 967 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 968 bhslr2->bhslr_flags = 0x80; 969 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 970 bhslr2->bhslr_initiator_task_tag = 971 bhslr->bhslr_initiator_task_tag; 972 icl_pdu_free(request); 973 cfiscsi_pdu_queue(response); 974 break; 975 default: 976 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 977 bhslr->bhslr_reason); 978 icl_pdu_free(request); 979 cfiscsi_session_terminate(cs); 980 break; 981 } 982} 983 984static void 985cfiscsi_callout(void *context) 986{ 987 struct icl_pdu *cp; 988 struct iscsi_bhs_nop_in *bhsni; 989 struct cfiscsi_session *cs; 990 991 cs = context; 992 993 if (cs->cs_terminating) 994 return; 995 996 callout_schedule(&cs->cs_callout, 1 * hz); 997 998 atomic_add_int(&cs->cs_timeout, 1); 999 1000#ifdef ICL_KERNEL_PROXY 1001 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1002 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1003 CFISCSI_SESSION_WARN(cs, "login timed out after " 1004 "%d seconds; dropping connection", cs->cs_timeout); 1005 cfiscsi_session_terminate(cs); 1006 } 1007 return; 1008 } 1009#endif 1010 1011 if (ping_timeout <= 0) { 1012 /* 1013 * Pings are disabled. Don't send NOP-In in this case; 1014 * user might have disabled pings to work around problems 1015 * with certain initiators that can't properly handle 1016 * NOP-In, such as iPXE. Reset the timeout, to avoid 1017 * triggering reconnection, should the user decide to 1018 * reenable them. 1019 */ 1020 cs->cs_timeout = 0; 1021 return; 1022 } 1023 1024 if (cs->cs_timeout >= ping_timeout) { 1025 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1026 "dropping connection", ping_timeout); 1027 cfiscsi_session_terminate(cs); 1028 return; 1029 } 1030 1031 /* 1032 * If the ping was reset less than one second ago - which means 1033 * that we've received some PDU during the last second - assume 1034 * the traffic flows correctly and don't bother sending a NOP-Out. 1035 * 1036 * (It's 2 - one for one second, and one for incrementing is_timeout 1037 * earlier in this routine.) 1038 */ 1039 if (cs->cs_timeout < 2) 1040 return; 1041 1042 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1043 if (cp == NULL) { 1044 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1045 return; 1046 } 1047 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1048 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1049 bhsni->bhsni_flags = 0x80; 1050 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1051 1052 cfiscsi_pdu_queue(cp); 1053} 1054 1055static struct cfiscsi_data_wait * 1056cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1057 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1058{ 1059 struct cfiscsi_data_wait *cdw; 1060 int error; 1061 1062 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1063 if (cdw == NULL) { 1064 CFISCSI_SESSION_WARN(cs, 1065 "failed to allocate %zd bytes", sizeof(*cdw)); 1066 return (NULL); 1067 } 1068 1069 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1070 &cdw->cdw_icl_prv); 1071 if (error != 0) { 1072 CFISCSI_SESSION_WARN(cs, 1073 "icl_conn_transfer_setup() failed with error %d", error); 1074 uma_zfree(cfiscsi_data_wait_zone, cdw); 1075 return (NULL); 1076 } 1077 1078 cdw->cdw_ctl_io = io; 1079 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1080 cdw->cdw_initiator_task_tag = initiator_task_tag; 1081 1082 return (cdw); 1083} 1084 1085static void 1086cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1087 struct cfiscsi_data_wait *cdw) 1088{ 1089 1090 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1091 uma_zfree(cfiscsi_data_wait_zone, cdw); 1092} 1093 1094static void 1095cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1096{ 1097 struct cfiscsi_data_wait *cdw; 1098 union ctl_io *io; 1099 int error, last, wait; 1100 1101 if (cs->cs_target == NULL) 1102 return; /* No target yet, so nothing to do. */ 1103 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1104 ctl_zero_io(io); 1105 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1106 io->io_hdr.io_type = CTL_IO_TASK; 1107 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1108 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1109 io->io_hdr.nexus.targ_lun = 0; 1110 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1111 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1112 wait = cs->cs_outstanding_ctl_pdus; 1113 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1114 error = ctl_queue(io); 1115 if (error != CTL_RETVAL_COMPLETE) { 1116 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1117 refcount_release(&cs->cs_outstanding_ctl_pdus); 1118 ctl_free_io(io); 1119 } 1120 1121 CFISCSI_SESSION_LOCK(cs); 1122 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1123 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1124 CFISCSI_SESSION_UNLOCK(cs); 1125 /* 1126 * Set nonzero port status; this prevents backends from 1127 * assuming that the data transfer actually succeeded 1128 * and writing uninitialized data to disk. 1129 */ 1130 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1131 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1132 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1133 cfiscsi_data_wait_free(cs, cdw); 1134 CFISCSI_SESSION_LOCK(cs); 1135 } 1136 CFISCSI_SESSION_UNLOCK(cs); 1137 1138 /* 1139 * Wait for CTL to terminate all the tasks. 1140 */ 1141 if (wait > 0) 1142 CFISCSI_SESSION_WARN(cs, 1143 "waiting for CTL to terminate %d tasks", wait); 1144 for (;;) { 1145 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1146 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1147 if (last != 0) 1148 break; 1149 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1150 0, "cfiscsi_terminate", hz / 100); 1151 } 1152 if (wait > 0) 1153 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1154} 1155 1156static void 1157cfiscsi_maintenance_thread(void *arg) 1158{ 1159 struct cfiscsi_session *cs; 1160 1161 cs = arg; 1162 1163 for (;;) { 1164 CFISCSI_SESSION_LOCK(cs); 1165 if (cs->cs_terminating == false || cs->cs_handoff_in_progress) 1166 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1167 CFISCSI_SESSION_UNLOCK(cs); 1168 1169 if (cs->cs_terminating && cs->cs_handoff_in_progress == false) { 1170 1171 /* 1172 * We used to wait up to 30 seconds to deliver queued 1173 * PDUs to the initiator. We also tried hard to deliver 1174 * SCSI Responses for the aborted PDUs. We don't do 1175 * that anymore. We might need to revisit that. 1176 */ 1177 callout_drain(&cs->cs_callout); 1178 icl_conn_close(cs->cs_conn); 1179 1180 /* 1181 * At this point ICL receive thread is no longer 1182 * running; no new tasks can be queued. 1183 */ 1184 cfiscsi_session_terminate_tasks(cs); 1185 cfiscsi_session_delete(cs); 1186 kthread_exit(); 1187 return; 1188 } 1189 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1190 } 1191} 1192 1193static void 1194cfiscsi_session_terminate(struct cfiscsi_session *cs) 1195{ 1196 1197 cs->cs_terminating = true; 1198 cv_signal(&cs->cs_maintenance_cv); 1199#ifdef ICL_KERNEL_PROXY 1200 cv_signal(&cs->cs_login_cv); 1201#endif 1202} 1203 1204static int 1205cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1206{ 1207 struct cfiscsi_target *ct; 1208 char *name; 1209 int i; 1210 1211 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1212 1213 ct = cs->cs_target; 1214 name = strdup(cs->cs_initiator_id, M_CTL); 1215 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1216 if (i < 0) { 1217 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1218 i); 1219 cs->cs_ctl_initid = -1; 1220 return (1); 1221 } 1222 cs->cs_ctl_initid = i; 1223#if 0 1224 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1225#endif 1226 1227 return (0); 1228} 1229 1230static void 1231cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1232{ 1233 int error; 1234 1235 if (cs->cs_ctl_initid == -1) 1236 return; 1237 1238 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1239 if (error != 0) { 1240 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1241 error); 1242 } 1243 cs->cs_ctl_initid = -1; 1244} 1245 1246static struct cfiscsi_session * 1247cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1248{ 1249 struct cfiscsi_session *cs; 1250 int error; 1251 1252 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1253 if (cs == NULL) { 1254 CFISCSI_WARN("malloc failed"); 1255 return (NULL); 1256 } 1257 cs->cs_ctl_initid = -1; 1258 1259 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1260 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1261 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1262 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1263#ifdef ICL_KERNEL_PROXY 1264 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1265#endif 1266 1267 /* 1268 * The purpose of this is to avoid racing with session shutdown. 1269 * Otherwise we could have the maintenance thread call icl_conn_close() 1270 * before we call icl_conn_handoff(). 1271 */ 1272 cs->cs_handoff_in_progress = true; 1273 1274 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); 1275 if (cs->cs_conn == NULL) { 1276 free(cs, M_CFISCSI); 1277 return (NULL); 1278 } 1279 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1280 cs->cs_conn->ic_error = cfiscsi_error_callback; 1281 cs->cs_conn->ic_prv0 = cs; 1282 1283 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1284 if (error != 0) { 1285 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1286 free(cs, M_CFISCSI); 1287 return (NULL); 1288 } 1289 1290 mtx_lock(&softc->lock); 1291 cs->cs_id = ++softc->last_session_id; 1292 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1293 mtx_unlock(&softc->lock); 1294 1295 /* 1296 * Start pinging the initiator. 1297 */ 1298 callout_init(&cs->cs_callout, 1); 1299 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1300 1301 return (cs); 1302} 1303 1304static void 1305cfiscsi_session_delete(struct cfiscsi_session *cs) 1306{ 1307 struct cfiscsi_softc *softc; 1308 1309 softc = &cfiscsi_softc; 1310 1311 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1312 ("destroying session with outstanding CTL pdus")); 1313 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1314 ("destroying session with non-empty queue")); 1315 1316 mtx_lock(&softc->lock); 1317 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1318 mtx_unlock(&softc->lock); 1319 1320 cfiscsi_session_unregister_initiator(cs); 1321 if (cs->cs_target != NULL) 1322 cfiscsi_target_release(cs->cs_target); 1323 icl_conn_close(cs->cs_conn); 1324 icl_conn_free(cs->cs_conn); 1325 free(cs, M_CFISCSI); 1326 cv_signal(&softc->sessions_cv); 1327} 1328 1329static int 1330cfiscsi_init(void) 1331{ 1332 struct cfiscsi_softc *softc; 1333 1334 softc = &cfiscsi_softc; 1335 bzero(softc, sizeof(*softc)); 1336 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1337 1338 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1339#ifdef ICL_KERNEL_PROXY 1340 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1341#endif 1342 TAILQ_INIT(&softc->sessions); 1343 TAILQ_INIT(&softc->targets); 1344 1345 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1346 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1347 UMA_ALIGN_PTR, 0); 1348 1349 return (0); 1350} 1351 1352static int 1353cfiscsi_shutdown(void) 1354{ 1355 struct cfiscsi_softc *softc = &cfiscsi_softc; 1356 1357 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) 1358 return (EBUSY); 1359 1360 uma_zdestroy(cfiscsi_data_wait_zone); 1361#ifdef ICL_KERNEL_PROXY 1362 cv_destroy(&softc->accept_cv); 1363#endif 1364 cv_destroy(&softc->sessions_cv); 1365 mtx_destroy(&softc->lock); 1366 return (0); 1367} 1368 1369#ifdef ICL_KERNEL_PROXY 1370static void 1371cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1372{ 1373 struct cfiscsi_session *cs; 1374 1375 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1376 if (cs == NULL) { 1377 CFISCSI_WARN("failed to create session"); 1378 return; 1379 } 1380 1381 icl_conn_handoff_sock(cs->cs_conn, so); 1382 cs->cs_initiator_sa = sa; 1383 cs->cs_portal_id = portal_id; 1384 cs->cs_handoff_in_progress = false; 1385 cs->cs_waiting_for_ctld = true; 1386 cv_signal(&cfiscsi_softc.accept_cv); 1387 1388 CFISCSI_SESSION_LOCK(cs); 1389 /* 1390 * Wake up the maintenance thread if we got scheduled for termination 1391 * somewhere between cfiscsi_session_new() and icl_conn_handoff_sock(). 1392 */ 1393 if (cs->cs_terminating) 1394 cfiscsi_session_terminate(cs); 1395 CFISCSI_SESSION_UNLOCK(cs); 1396} 1397#endif 1398 1399static void 1400cfiscsi_online(void *arg) 1401{ 1402 struct cfiscsi_softc *softc; 1403 struct cfiscsi_target *ct; 1404 int online; 1405 1406 ct = (struct cfiscsi_target *)arg; 1407 softc = ct->ct_softc; 1408 1409 mtx_lock(&softc->lock); 1410 if (ct->ct_online) { 1411 mtx_unlock(&softc->lock); 1412 return; 1413 } 1414 ct->ct_online = 1; 1415 online = softc->online++; 1416 mtx_unlock(&softc->lock); 1417 if (online > 0) 1418 return; 1419 1420#ifdef ICL_KERNEL_PROXY 1421 if (softc->listener != NULL) 1422 icl_listen_free(softc->listener); 1423 softc->listener = icl_listen_new(cfiscsi_accept); 1424#endif 1425} 1426 1427static void 1428cfiscsi_offline(void *arg) 1429{ 1430 struct cfiscsi_softc *softc; 1431 struct cfiscsi_target *ct; 1432 struct cfiscsi_session *cs; 1433 int online; 1434 1435 ct = (struct cfiscsi_target *)arg; 1436 softc = ct->ct_softc; 1437 1438 mtx_lock(&softc->lock); 1439 if (!ct->ct_online) { 1440 mtx_unlock(&softc->lock); 1441 return; 1442 } 1443 ct->ct_online = 0; 1444 online = --softc->online; 1445 1446 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1447 if (cs->cs_target == ct) 1448 cfiscsi_session_terminate(cs); 1449 } 1450 do { 1451 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1452 if (cs->cs_target == ct) 1453 break; 1454 } 1455 if (cs != NULL) 1456 cv_wait(&softc->sessions_cv, &softc->lock); 1457 } while (cs != NULL && ct->ct_online == 0); 1458 mtx_unlock(&softc->lock); 1459 if (online > 0) 1460 return; 1461 1462#ifdef ICL_KERNEL_PROXY 1463 icl_listen_free(softc->listener); 1464 softc->listener = NULL; 1465#endif 1466} 1467 1468static int 1469cfiscsi_info(void *arg, struct sbuf *sb) 1470{ 1471 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1472 int retval; 1473 1474 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1475 ct->ct_state); 1476 return (retval); 1477} 1478 1479static void 1480cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1481{ 1482 struct cfiscsi_softc *softc; 1483 struct cfiscsi_session *cs, *cs2; 1484 struct cfiscsi_target *ct; 1485 struct ctl_iscsi_handoff_params *cihp; 1486 int error; 1487 1488 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1489 softc = &cfiscsi_softc; 1490 1491 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1492 cihp->initiator_name, cihp->initiator_addr, 1493 cihp->target_name); 1494 1495 ct = cfiscsi_target_find(softc, cihp->target_name, 1496 cihp->portal_group_tag); 1497 if (ct == NULL) { 1498 ci->status = CTL_ISCSI_ERROR; 1499 snprintf(ci->error_str, sizeof(ci->error_str), 1500 "%s: target not found", __func__); 1501 return; 1502 } 1503 1504#ifdef ICL_KERNEL_PROXY 1505 if (cihp->socket > 0 && cihp->connection_id > 0) { 1506 snprintf(ci->error_str, sizeof(ci->error_str), 1507 "both socket and connection_id set"); 1508 ci->status = CTL_ISCSI_ERROR; 1509 cfiscsi_target_release(ct); 1510 return; 1511 } 1512 if (cihp->socket == 0) { 1513 mtx_lock(&cfiscsi_softc.lock); 1514 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1515 if (cs->cs_id == cihp->connection_id) 1516 break; 1517 } 1518 if (cs == NULL) { 1519 mtx_unlock(&cfiscsi_softc.lock); 1520 snprintf(ci->error_str, sizeof(ci->error_str), 1521 "connection not found"); 1522 ci->status = CTL_ISCSI_ERROR; 1523 cfiscsi_target_release(ct); 1524 return; 1525 } 1526 mtx_unlock(&cfiscsi_softc.lock); 1527 } else { 1528#endif 1529 cs = cfiscsi_session_new(softc, cihp->offload); 1530 if (cs == NULL) { 1531 ci->status = CTL_ISCSI_ERROR; 1532 snprintf(ci->error_str, sizeof(ci->error_str), 1533 "%s: cfiscsi_session_new failed", __func__); 1534 cfiscsi_target_release(ct); 1535 return; 1536 } 1537#ifdef ICL_KERNEL_PROXY 1538 } 1539#endif 1540 1541 /* 1542 * First PDU of Full Feature phase has the same CmdSN as the last 1543 * PDU from the Login Phase received from the initiator. Thus, 1544 * the -1 below. 1545 */ 1546 cs->cs_cmdsn = cihp->cmdsn; 1547 cs->cs_statsn = cihp->statsn; 1548 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1549 cs->cs_max_burst_length = cihp->max_burst_length; 1550 cs->cs_first_burst_length = cihp->first_burst_length; 1551 cs->cs_immediate_data = !!cihp->immediate_data; 1552 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1553 cs->cs_conn->ic_header_crc32c = true; 1554 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1555 cs->cs_conn->ic_data_crc32c = true; 1556 1557 strlcpy(cs->cs_initiator_name, 1558 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1559 strlcpy(cs->cs_initiator_addr, 1560 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1561 strlcpy(cs->cs_initiator_alias, 1562 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1563 memcpy(cs->cs_initiator_isid, 1564 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1565 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1566 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1567 cihp->initiator_isid[0], cihp->initiator_isid[1], 1568 cihp->initiator_isid[2], cihp->initiator_isid[3], 1569 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1570 1571 mtx_lock(&softc->lock); 1572 if (ct->ct_online == 0) { 1573 mtx_unlock(&softc->lock); 1574 CFISCSI_SESSION_LOCK(cs); 1575 cs->cs_handoff_in_progress = false; 1576 cfiscsi_session_terminate(cs); 1577 CFISCSI_SESSION_UNLOCK(cs); 1578 cfiscsi_target_release(ct); 1579 ci->status = CTL_ISCSI_ERROR; 1580 snprintf(ci->error_str, sizeof(ci->error_str), 1581 "%s: port offline", __func__); 1582 return; 1583 } 1584 cs->cs_target = ct; 1585 mtx_unlock(&softc->lock); 1586 1587restart: 1588 if (!cs->cs_terminating) { 1589 mtx_lock(&softc->lock); 1590 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1591 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1592 cs->cs_target == cs2->cs_target && 1593 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1594 if (strcmp(cs->cs_initiator_addr, 1595 cs2->cs_initiator_addr) != 0) { 1596 CFISCSI_SESSION_WARN(cs2, 1597 "session reinstatement from " 1598 "different address %s", 1599 cs->cs_initiator_addr); 1600 } else { 1601 CFISCSI_SESSION_DEBUG(cs2, 1602 "session reinstatement"); 1603 } 1604 cfiscsi_session_terminate(cs2); 1605 mtx_unlock(&softc->lock); 1606 pause("cfiscsi_reinstate", 1); 1607 goto restart; 1608 } 1609 } 1610 mtx_unlock(&softc->lock); 1611 } 1612 1613 /* 1614 * Register initiator with CTL. 1615 */ 1616 cfiscsi_session_register_initiator(cs); 1617 1618#ifdef ICL_KERNEL_PROXY 1619 if (cihp->socket > 0) { 1620#endif 1621 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1622 if (error != 0) { 1623 CFISCSI_SESSION_LOCK(cs); 1624 cs->cs_handoff_in_progress = false; 1625 cfiscsi_session_terminate(cs); 1626 CFISCSI_SESSION_UNLOCK(cs); 1627 ci->status = CTL_ISCSI_ERROR; 1628 snprintf(ci->error_str, sizeof(ci->error_str), 1629 "%s: icl_conn_handoff failed with error %d", 1630 __func__, error); 1631 return; 1632 } 1633#ifdef ICL_KERNEL_PROXY 1634 } 1635#endif 1636 1637#ifdef ICL_KERNEL_PROXY 1638 cs->cs_login_phase = false; 1639 1640 /* 1641 * First PDU of the Full Feature phase has likely already arrived. 1642 * We have to pick it up and execute properly. 1643 */ 1644 if (cs->cs_login_pdu != NULL) { 1645 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1646 cfiscsi_pdu_handle(cs->cs_login_pdu); 1647 cs->cs_login_pdu = NULL; 1648 } 1649#endif 1650 1651 CFISCSI_SESSION_LOCK(cs); 1652 cs->cs_handoff_in_progress = false; 1653 1654 /* 1655 * Wake up the maintenance thread if we got scheduled for termination. 1656 */ 1657 if (cs->cs_terminating) 1658 cfiscsi_session_terminate(cs); 1659 CFISCSI_SESSION_UNLOCK(cs); 1660 1661 ci->status = CTL_ISCSI_OK; 1662} 1663 1664static void 1665cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1666{ 1667 struct ctl_iscsi_list_params *cilp; 1668 struct cfiscsi_session *cs; 1669 struct cfiscsi_softc *softc; 1670 struct sbuf *sb; 1671 int error; 1672 1673 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1674 softc = &cfiscsi_softc; 1675 1676 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1677 if (sb == NULL) { 1678 ci->status = CTL_ISCSI_ERROR; 1679 snprintf(ci->error_str, sizeof(ci->error_str), 1680 "Unable to allocate %d bytes for iSCSI session list", 1681 cilp->alloc_len); 1682 return; 1683 } 1684 1685 sbuf_printf(sb, "<ctlislist>\n"); 1686 mtx_lock(&softc->lock); 1687 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1688 if (cs->cs_target == NULL) 1689 continue; 1690 error = sbuf_printf(sb, "<connection id=\"%d\">" 1691 "<initiator>%s</initiator>" 1692 "<initiator_addr>%s</initiator_addr>" 1693 "<initiator_alias>%s</initiator_alias>" 1694 "<target>%s</target>" 1695 "<target_alias>%s</target_alias>" 1696 "<target_portal_group_tag>%u</target_portal_group_tag>" 1697 "<header_digest>%s</header_digest>" 1698 "<data_digest>%s</data_digest>" 1699 "<max_data_segment_length>%zd</max_data_segment_length>" 1700 "<max_burst_length>%zd</max_burst_length>" 1701 "<first_burst_length>%zd</first_burst_length>" 1702 "<immediate_data>%d</immediate_data>" 1703 "<iser>%d</iser>" 1704 "<offload>%s</offload>" 1705 "</connection>\n", 1706 cs->cs_id, 1707 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1708 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1709 cs->cs_target->ct_tag, 1710 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1711 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1712 cs->cs_max_data_segment_length, 1713 cs->cs_max_burst_length, 1714 cs->cs_first_burst_length, 1715 cs->cs_immediate_data, 1716 cs->cs_conn->ic_iser, 1717 cs->cs_conn->ic_offload); 1718 if (error != 0) 1719 break; 1720 } 1721 mtx_unlock(&softc->lock); 1722 error = sbuf_printf(sb, "</ctlislist>\n"); 1723 if (error != 0) { 1724 sbuf_delete(sb); 1725 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1726 snprintf(ci->error_str, sizeof(ci->error_str), 1727 "Out of space, %d bytes is too small", cilp->alloc_len); 1728 return; 1729 } 1730 sbuf_finish(sb); 1731 1732 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1733 if (error != 0) { 1734 sbuf_delete(sb); 1735 snprintf(ci->error_str, sizeof(ci->error_str), 1736 "copyout failed with error %d", error); 1737 ci->status = CTL_ISCSI_ERROR; 1738 return; 1739 } 1740 cilp->fill_len = sbuf_len(sb) + 1; 1741 ci->status = CTL_ISCSI_OK; 1742 sbuf_delete(sb); 1743} 1744 1745static void 1746cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1747{ 1748 struct icl_pdu *response; 1749 struct iscsi_bhs_asynchronous_message *bhsam; 1750 struct ctl_iscsi_logout_params *cilp; 1751 struct cfiscsi_session *cs; 1752 struct cfiscsi_softc *softc; 1753 int found = 0; 1754 1755 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1756 softc = &cfiscsi_softc; 1757 1758 mtx_lock(&softc->lock); 1759 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1760 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1761 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1762 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1763 continue; 1764 1765 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1766 if (response == NULL) { 1767 ci->status = CTL_ISCSI_ERROR; 1768 snprintf(ci->error_str, sizeof(ci->error_str), 1769 "Unable to allocate memory"); 1770 mtx_unlock(&softc->lock); 1771 return; 1772 } 1773 bhsam = 1774 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1775 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1776 bhsam->bhsam_flags = 0x80; 1777 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1778 bhsam->bhsam_parameter3 = htons(10); 1779 cfiscsi_pdu_queue(response); 1780 found++; 1781 } 1782 mtx_unlock(&softc->lock); 1783 1784 if (found == 0) { 1785 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1786 snprintf(ci->error_str, sizeof(ci->error_str), 1787 "No matching connections found"); 1788 return; 1789 } 1790 1791 ci->status = CTL_ISCSI_OK; 1792} 1793 1794static void 1795cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1796{ 1797 struct icl_pdu *response; 1798 struct iscsi_bhs_asynchronous_message *bhsam; 1799 struct ctl_iscsi_terminate_params *citp; 1800 struct cfiscsi_session *cs; 1801 struct cfiscsi_softc *softc; 1802 int found = 0; 1803 1804 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1805 softc = &cfiscsi_softc; 1806 1807 mtx_lock(&softc->lock); 1808 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1809 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1810 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1811 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1812 continue; 1813 1814 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1815 if (response == NULL) { 1816 /* 1817 * Oh well. Just terminate the connection. 1818 */ 1819 } else { 1820 bhsam = (struct iscsi_bhs_asynchronous_message *) 1821 response->ip_bhs; 1822 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1823 bhsam->bhsam_flags = 0x80; 1824 bhsam->bhsam_0xffffffff = 0xffffffff; 1825 bhsam->bhsam_async_event = 1826 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1827 cfiscsi_pdu_queue(response); 1828 } 1829 cfiscsi_session_terminate(cs); 1830 found++; 1831 } 1832 mtx_unlock(&softc->lock); 1833 1834 if (found == 0) { 1835 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1836 snprintf(ci->error_str, sizeof(ci->error_str), 1837 "No matching connections found"); 1838 return; 1839 } 1840 1841 ci->status = CTL_ISCSI_OK; 1842} 1843 1844static void 1845cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1846{ 1847 struct ctl_iscsi_limits_params *cilp; 1848 int error; 1849 1850 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1851 1852 error = icl_limits(cilp->offload, false, 1853 &cilp->data_segment_limit); 1854 if (error != 0) { 1855 ci->status = CTL_ISCSI_ERROR; 1856 snprintf(ci->error_str, sizeof(ci->error_str), 1857 "%s: icl_limits failed with error %d", 1858 __func__, error); 1859 return; 1860 } 1861 1862 ci->status = CTL_ISCSI_OK; 1863} 1864 1865#ifdef ICL_KERNEL_PROXY 1866static void 1867cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1868{ 1869 struct ctl_iscsi_listen_params *cilp; 1870 struct sockaddr *sa; 1871 int error; 1872 1873 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1874 1875 if (cfiscsi_softc.listener == NULL) { 1876 CFISCSI_DEBUG("no listener"); 1877 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1878 ci->status = CTL_ISCSI_ERROR; 1879 return; 1880 } 1881 1882 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1883 if (error != 0) { 1884 CFISCSI_DEBUG("getsockaddr, error %d", error); 1885 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1886 ci->status = CTL_ISCSI_ERROR; 1887 return; 1888 } 1889 1890 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1891 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1892 if (error != 0) { 1893 free(sa, M_SONAME); 1894 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1895 snprintf(ci->error_str, sizeof(ci->error_str), 1896 "icl_listen_add failed, error %d", error); 1897 ci->status = CTL_ISCSI_ERROR; 1898 return; 1899 } 1900 1901 ci->status = CTL_ISCSI_OK; 1902} 1903 1904static void 1905cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1906{ 1907 struct ctl_iscsi_accept_params *ciap; 1908 struct cfiscsi_session *cs; 1909 int error; 1910 1911 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1912 1913 mtx_lock(&cfiscsi_softc.lock); 1914 for (;;) { 1915 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1916 if (cs->cs_waiting_for_ctld) 1917 break; 1918 } 1919 if (cs != NULL) 1920 break; 1921 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1922 if (error != 0) { 1923 mtx_unlock(&cfiscsi_softc.lock); 1924 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1925 ci->status = CTL_ISCSI_ERROR; 1926 return; 1927 } 1928 } 1929 mtx_unlock(&cfiscsi_softc.lock); 1930 1931 cs->cs_waiting_for_ctld = false; 1932 cs->cs_login_phase = true; 1933 1934 ciap->connection_id = cs->cs_id; 1935 ciap->portal_id = cs->cs_portal_id; 1936 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1937 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1938 cs->cs_initiator_sa->sa_len); 1939 if (error != 0) { 1940 snprintf(ci->error_str, sizeof(ci->error_str), 1941 "copyout failed with error %d", error); 1942 ci->status = CTL_ISCSI_ERROR; 1943 return; 1944 } 1945 1946 ci->status = CTL_ISCSI_OK; 1947} 1948 1949static void 1950cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1951{ 1952 struct ctl_iscsi_send_params *cisp; 1953 struct cfiscsi_session *cs; 1954 struct icl_pdu *ip; 1955 size_t datalen; 1956 void *data; 1957 int error; 1958 1959 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1960 1961 mtx_lock(&cfiscsi_softc.lock); 1962 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1963 if (cs->cs_id == cisp->connection_id) 1964 break; 1965 } 1966 if (cs == NULL) { 1967 mtx_unlock(&cfiscsi_softc.lock); 1968 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1969 ci->status = CTL_ISCSI_ERROR; 1970 return; 1971 } 1972 mtx_unlock(&cfiscsi_softc.lock); 1973 1974#if 0 1975 if (cs->cs_login_phase == false) 1976 return (EBUSY); 1977#endif 1978 1979 if (cs->cs_terminating) { 1980 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1981 ci->status = CTL_ISCSI_ERROR; 1982 return; 1983 } 1984 1985 datalen = cisp->data_segment_len; 1986 /* 1987 * XXX 1988 */ 1989 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1990 if (datalen > 65535) { 1991 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1992 ci->status = CTL_ISCSI_ERROR; 1993 return; 1994 } 1995 if (datalen > 0) { 1996 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1997 error = copyin(cisp->data_segment, data, datalen); 1998 if (error != 0) { 1999 free(data, M_CFISCSI); 2000 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 2001 ci->status = CTL_ISCSI_ERROR; 2002 return; 2003 } 2004 } 2005 2006 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 2007 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 2008 if (datalen > 0) { 2009 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 2010 free(data, M_CFISCSI); 2011 } 2012 CFISCSI_SESSION_LOCK(cs); 2013 icl_pdu_queue(ip); 2014 CFISCSI_SESSION_UNLOCK(cs); 2015 ci->status = CTL_ISCSI_OK; 2016} 2017 2018static void 2019cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 2020{ 2021 struct ctl_iscsi_receive_params *cirp; 2022 struct cfiscsi_session *cs; 2023 struct icl_pdu *ip; 2024 void *data; 2025 int error; 2026 2027 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2028 2029 mtx_lock(&cfiscsi_softc.lock); 2030 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2031 if (cs->cs_id == cirp->connection_id) 2032 break; 2033 } 2034 if (cs == NULL) { 2035 mtx_unlock(&cfiscsi_softc.lock); 2036 snprintf(ci->error_str, sizeof(ci->error_str), 2037 "connection not found"); 2038 ci->status = CTL_ISCSI_ERROR; 2039 return; 2040 } 2041 mtx_unlock(&cfiscsi_softc.lock); 2042 2043#if 0 2044 if (is->is_login_phase == false) 2045 return (EBUSY); 2046#endif 2047 2048 CFISCSI_SESSION_LOCK(cs); 2049 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2050 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2051 if (error != 0) { 2052 CFISCSI_SESSION_UNLOCK(cs); 2053 snprintf(ci->error_str, sizeof(ci->error_str), 2054 "interrupted by signal"); 2055 ci->status = CTL_ISCSI_ERROR; 2056 return; 2057 } 2058 } 2059 2060 if (cs->cs_terminating) { 2061 CFISCSI_SESSION_UNLOCK(cs); 2062 snprintf(ci->error_str, sizeof(ci->error_str), 2063 "connection terminating"); 2064 ci->status = CTL_ISCSI_ERROR; 2065 return; 2066 } 2067 ip = cs->cs_login_pdu; 2068 cs->cs_login_pdu = NULL; 2069 CFISCSI_SESSION_UNLOCK(cs); 2070 2071 if (ip->ip_data_len > cirp->data_segment_len) { 2072 icl_pdu_free(ip); 2073 snprintf(ci->error_str, sizeof(ci->error_str), 2074 "data segment too big"); 2075 ci->status = CTL_ISCSI_ERROR; 2076 return; 2077 } 2078 2079 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2080 if (ip->ip_data_len > 0) { 2081 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2082 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2083 copyout(data, cirp->data_segment, ip->ip_data_len); 2084 free(data, M_CFISCSI); 2085 } 2086 2087 icl_pdu_free(ip); 2088 ci->status = CTL_ISCSI_OK; 2089} 2090 2091#endif /* !ICL_KERNEL_PROXY */ 2092 2093static void 2094cfiscsi_ioctl_port_create(struct ctl_req *req) 2095{ 2096 struct cfiscsi_target *ct; 2097 struct ctl_port *port; 2098 const char *target, *alias, *tags; 2099 struct scsi_vpd_id_descriptor *desc; 2100 ctl_options_t opts; 2101 int retval, len, idlen; 2102 uint16_t tag; 2103 2104 ctl_init_opts(&opts, req->num_args, req->kern_args); 2105 target = ctl_get_opt(&opts, "cfiscsi_target"); 2106 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2107 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2108 if (target == NULL || tags == NULL) { 2109 req->status = CTL_LUN_ERROR; 2110 snprintf(req->error_str, sizeof(req->error_str), 2111 "Missing required argument"); 2112 ctl_free_opts(&opts); 2113 return; 2114 } 2115 tag = strtol(tags, (char **)NULL, 10); 2116 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2117 if (ct == NULL) { 2118 req->status = CTL_LUN_ERROR; 2119 snprintf(req->error_str, sizeof(req->error_str), 2120 "failed to create target \"%s\"", target); 2121 ctl_free_opts(&opts); 2122 return; 2123 } 2124 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2125 req->status = CTL_LUN_ERROR; 2126 snprintf(req->error_str, sizeof(req->error_str), 2127 "target \"%s\" for portal group tag %u already exists", 2128 target, tag); 2129 cfiscsi_target_release(ct); 2130 ctl_free_opts(&opts); 2131 return; 2132 } 2133 port = &ct->ct_port; 2134 // WAT 2135 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2136 goto done; 2137 2138 port->frontend = &cfiscsi_frontend; 2139 port->port_type = CTL_PORT_ISCSI; 2140 /* XXX KDM what should the real number be here? */ 2141 port->num_requested_ctl_io = 4096; 2142 port->port_name = "iscsi"; 2143 port->physical_port = tag; 2144 port->virtual_port = ct->ct_target_id; 2145 port->port_online = cfiscsi_online; 2146 port->port_offline = cfiscsi_offline; 2147 port->port_info = cfiscsi_info; 2148 port->onoff_arg = ct; 2149 port->fe_datamove = cfiscsi_datamove; 2150 port->fe_done = cfiscsi_done; 2151 2152 /* XXX KDM what should we report here? */ 2153 /* XXX These should probably be fetched from CTL. */ 2154 port->max_targets = 1; 2155 port->max_target_id = 15; 2156 port->targ_port = -1; 2157 2158 port->options = opts; 2159 STAILQ_INIT(&opts); 2160 2161 /* Generate Port ID. */ 2162 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2163 idlen = roundup2(idlen, 4); 2164 len = sizeof(struct scsi_vpd_device_id) + idlen; 2165 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2166 M_CTL, M_WAITOK | M_ZERO); 2167 port->port_devid->len = len; 2168 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2169 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2170 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2171 SVPD_ID_TYPE_SCSI_NAME; 2172 desc->length = idlen; 2173 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2174 2175 /* Generate Target ID. */ 2176 idlen = strlen(target) + 1; 2177 idlen = roundup2(idlen, 4); 2178 len = sizeof(struct scsi_vpd_device_id) + idlen; 2179 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2180 M_CTL, M_WAITOK | M_ZERO); 2181 port->target_devid->len = len; 2182 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2183 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2184 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2185 SVPD_ID_TYPE_SCSI_NAME; 2186 desc->length = idlen; 2187 strlcpy(desc->identifier, target, idlen); 2188 2189 retval = ctl_port_register(port); 2190 if (retval != 0) { 2191 ctl_free_opts(&port->options); 2192 free(port->port_devid, M_CFISCSI); 2193 free(port->target_devid, M_CFISCSI); 2194 cfiscsi_target_release(ct); 2195 req->status = CTL_LUN_ERROR; 2196 snprintf(req->error_str, sizeof(req->error_str), 2197 "ctl_port_register() failed with error %d", retval); 2198 return; 2199 } 2200done: 2201 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2202 req->status = CTL_LUN_OK; 2203 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2204 sizeof(port->targ_port)); //XXX 2205} 2206 2207static void 2208cfiscsi_ioctl_port_remove(struct ctl_req *req) 2209{ 2210 struct cfiscsi_target *ct; 2211 const char *target, *tags; 2212 ctl_options_t opts; 2213 uint16_t tag; 2214 2215 ctl_init_opts(&opts, req->num_args, req->kern_args); 2216 target = ctl_get_opt(&opts, "cfiscsi_target"); 2217 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2218 if (target == NULL || tags == NULL) { 2219 ctl_free_opts(&opts); 2220 req->status = CTL_LUN_ERROR; 2221 snprintf(req->error_str, sizeof(req->error_str), 2222 "Missing required argument"); 2223 return; 2224 } 2225 tag = strtol(tags, (char **)NULL, 10); 2226 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2227 if (ct == NULL) { 2228 ctl_free_opts(&opts); 2229 req->status = CTL_LUN_ERROR; 2230 snprintf(req->error_str, sizeof(req->error_str), 2231 "can't find target \"%s\"", target); 2232 return; 2233 } 2234 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2235 ctl_free_opts(&opts); 2236 req->status = CTL_LUN_ERROR; 2237 snprintf(req->error_str, sizeof(req->error_str), 2238 "target \"%s\" is already dying", target); 2239 return; 2240 } 2241 ctl_free_opts(&opts); 2242 2243 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2244 ctl_port_offline(&ct->ct_port); 2245 cfiscsi_target_release(ct); 2246 cfiscsi_target_release(ct); 2247 req->status = CTL_LUN_OK; 2248} 2249 2250static int 2251cfiscsi_ioctl(struct cdev *dev, 2252 u_long cmd, caddr_t addr, int flag, struct thread *td) 2253{ 2254 struct ctl_iscsi *ci; 2255 struct ctl_req *req; 2256 2257 if (cmd == CTL_PORT_REQ) { 2258 req = (struct ctl_req *)addr; 2259 switch (req->reqtype) { 2260 case CTL_REQ_CREATE: 2261 cfiscsi_ioctl_port_create(req); 2262 break; 2263 case CTL_REQ_REMOVE: 2264 cfiscsi_ioctl_port_remove(req); 2265 break; 2266 default: 2267 req->status = CTL_LUN_ERROR; 2268 snprintf(req->error_str, sizeof(req->error_str), 2269 "Unsupported request type %d", req->reqtype); 2270 } 2271 return (0); 2272 } 2273 2274 if (cmd != CTL_ISCSI) 2275 return (ENOTTY); 2276 2277 ci = (struct ctl_iscsi *)addr; 2278 switch (ci->type) { 2279 case CTL_ISCSI_HANDOFF: 2280 cfiscsi_ioctl_handoff(ci); 2281 break; 2282 case CTL_ISCSI_LIST: 2283 cfiscsi_ioctl_list(ci); 2284 break; 2285 case CTL_ISCSI_LOGOUT: 2286 cfiscsi_ioctl_logout(ci); 2287 break; 2288 case CTL_ISCSI_TERMINATE: 2289 cfiscsi_ioctl_terminate(ci); 2290 break; 2291 case CTL_ISCSI_LIMITS: 2292 cfiscsi_ioctl_limits(ci); 2293 break; 2294#ifdef ICL_KERNEL_PROXY 2295 case CTL_ISCSI_LISTEN: 2296 cfiscsi_ioctl_listen(ci); 2297 break; 2298 case CTL_ISCSI_ACCEPT: 2299 cfiscsi_ioctl_accept(ci); 2300 break; 2301 case CTL_ISCSI_SEND: 2302 cfiscsi_ioctl_send(ci); 2303 break; 2304 case CTL_ISCSI_RECEIVE: 2305 cfiscsi_ioctl_receive(ci); 2306 break; 2307#else 2308 case CTL_ISCSI_LISTEN: 2309 case CTL_ISCSI_ACCEPT: 2310 case CTL_ISCSI_SEND: 2311 case CTL_ISCSI_RECEIVE: 2312 ci->status = CTL_ISCSI_ERROR; 2313 snprintf(ci->error_str, sizeof(ci->error_str), 2314 "%s: CTL compiled without ICL_KERNEL_PROXY", 2315 __func__); 2316 break; 2317#endif /* !ICL_KERNEL_PROXY */ 2318 default: 2319 ci->status = CTL_ISCSI_ERROR; 2320 snprintf(ci->error_str, sizeof(ci->error_str), 2321 "%s: invalid iSCSI request type %d", __func__, ci->type); 2322 break; 2323 } 2324 2325 return (0); 2326} 2327 2328static void 2329cfiscsi_target_hold(struct cfiscsi_target *ct) 2330{ 2331 2332 refcount_acquire(&ct->ct_refcount); 2333} 2334 2335static void 2336cfiscsi_target_release(struct cfiscsi_target *ct) 2337{ 2338 struct cfiscsi_softc *softc; 2339 2340 softc = ct->ct_softc; 2341 mtx_lock(&softc->lock); 2342 if (refcount_release(&ct->ct_refcount)) { 2343 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2344 mtx_unlock(&softc->lock); 2345 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2346 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2347 if (ctl_port_deregister(&ct->ct_port) != 0) 2348 printf("%s: ctl_port_deregister() failed\n", 2349 __func__); 2350 } 2351 free(ct, M_CFISCSI); 2352 2353 return; 2354 } 2355 mtx_unlock(&softc->lock); 2356} 2357 2358static struct cfiscsi_target * 2359cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2360{ 2361 struct cfiscsi_target *ct; 2362 2363 mtx_lock(&softc->lock); 2364 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2365 if (ct->ct_tag != tag || 2366 strcmp(name, ct->ct_name) != 0 || 2367 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2368 continue; 2369 cfiscsi_target_hold(ct); 2370 mtx_unlock(&softc->lock); 2371 return (ct); 2372 } 2373 mtx_unlock(&softc->lock); 2374 2375 return (NULL); 2376} 2377 2378static struct cfiscsi_target * 2379cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2380 const char *alias, uint16_t tag) 2381{ 2382 struct cfiscsi_target *ct, *newct; 2383 2384 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2385 return (NULL); 2386 2387 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2388 2389 mtx_lock(&softc->lock); 2390 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2391 if (ct->ct_tag != tag || 2392 strcmp(name, ct->ct_name) != 0 || 2393 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2394 continue; 2395 cfiscsi_target_hold(ct); 2396 mtx_unlock(&softc->lock); 2397 free(newct, M_CFISCSI); 2398 return (ct); 2399 } 2400 2401 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2402 if (alias != NULL) 2403 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2404 newct->ct_tag = tag; 2405 refcount_init(&newct->ct_refcount, 1); 2406 newct->ct_softc = softc; 2407 if (TAILQ_EMPTY(&softc->targets)) 2408 softc->last_target_id = 0; 2409 newct->ct_target_id = ++softc->last_target_id; 2410 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2411 mtx_unlock(&softc->lock); 2412 2413 return (newct); 2414} 2415 2416static void 2417cfiscsi_datamove_in(union ctl_io *io) 2418{ 2419 struct cfiscsi_session *cs; 2420 struct icl_pdu *request, *response; 2421 const struct iscsi_bhs_scsi_command *bhssc; 2422 struct iscsi_bhs_data_in *bhsdi; 2423 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2424 size_t len, expected_len, sg_len, buffer_offset; 2425 const char *sg_addr; 2426 int ctl_sg_count, error, i; 2427 2428 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2429 cs = PDU_SESSION(request); 2430 2431 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2432 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2433 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2434 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2435 2436 if (io->scsiio.kern_sg_entries > 0) { 2437 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2438 ctl_sg_count = io->scsiio.kern_sg_entries; 2439 } else { 2440 ctl_sglist = &ctl_sg_entry; 2441 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2442 ctl_sglist->len = io->scsiio.kern_data_len; 2443 ctl_sg_count = 1; 2444 } 2445 2446 /* 2447 * This is the total amount of data to be transferred within the current 2448 * SCSI command. We need to record it so that we can properly report 2449 * underflow/underflow. 2450 */ 2451 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2452 2453 /* 2454 * This is the offset within the current SCSI command; for the first 2455 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2456 * it will be the sum of lengths of previous ones. 2457 */ 2458 buffer_offset = io->scsiio.kern_rel_offset; 2459 2460 /* 2461 * This is the transfer length expected by the initiator. In theory, 2462 * it could be different from the correct amount of data from the SCSI 2463 * point of view, even if that doesn't make any sense. 2464 */ 2465 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2466#if 0 2467 if (expected_len != io->scsiio.kern_total_len) { 2468 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2469 "actual length %zd", expected_len, 2470 (size_t)io->scsiio.kern_total_len); 2471 } 2472#endif 2473 2474 if (buffer_offset >= expected_len) { 2475#if 0 2476 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2477 "already sent the expected len", buffer_offset); 2478#endif 2479 io->scsiio.be_move_done(io); 2480 return; 2481 } 2482 2483 i = 0; 2484 sg_addr = NULL; 2485 sg_len = 0; 2486 response = NULL; 2487 bhsdi = NULL; 2488 for (;;) { 2489 if (response == NULL) { 2490 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2491 if (response == NULL) { 2492 CFISCSI_SESSION_WARN(cs, "failed to " 2493 "allocate memory; dropping connection"); 2494 ctl_set_busy(&io->scsiio); 2495 io->scsiio.be_move_done(io); 2496 cfiscsi_session_terminate(cs); 2497 return; 2498 } 2499 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2500 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2501 bhsdi->bhsdi_initiator_task_tag = 2502 bhssc->bhssc_initiator_task_tag; 2503 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2504 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2505 PDU_EXPDATASN(request)++; 2506 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2507 } 2508 2509 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2510 if (sg_len == 0) { 2511 sg_addr = ctl_sglist[i].addr; 2512 sg_len = ctl_sglist[i].len; 2513 KASSERT(sg_len > 0, ("sg_len <= 0")); 2514 } 2515 2516 len = sg_len; 2517 2518 /* 2519 * Truncate to maximum data segment length. 2520 */ 2521 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2522 ("ip_data_len %zd >= max_data_segment_length %zd", 2523 response->ip_data_len, cs->cs_max_data_segment_length)); 2524 if (response->ip_data_len + len > 2525 cs->cs_max_data_segment_length) { 2526 len = cs->cs_max_data_segment_length - 2527 response->ip_data_len; 2528 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2529 len, sg_len)); 2530 } 2531 2532 /* 2533 * Truncate to expected data transfer length. 2534 */ 2535 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2536 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2537 buffer_offset, response->ip_data_len, expected_len)); 2538 if (buffer_offset + response->ip_data_len + len > expected_len) { 2539 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2540 "to expected data transfer length %zd", 2541 buffer_offset + response->ip_data_len + len, expected_len); 2542 len = expected_len - (buffer_offset + response->ip_data_len); 2543 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2544 len, sg_len)); 2545 } 2546 2547 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2548 if (error != 0) { 2549 CFISCSI_SESSION_WARN(cs, "failed to " 2550 "allocate memory; dropping connection"); 2551 icl_pdu_free(response); 2552 ctl_set_busy(&io->scsiio); 2553 io->scsiio.be_move_done(io); 2554 cfiscsi_session_terminate(cs); 2555 return; 2556 } 2557 sg_addr += len; 2558 sg_len -= len; 2559 io->scsiio.kern_data_resid -= len; 2560 2561 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2562 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2563 buffer_offset, response->ip_data_len, expected_len)); 2564 if (buffer_offset + response->ip_data_len == expected_len) { 2565 /* 2566 * Already have the amount of data the initiator wanted. 2567 */ 2568 break; 2569 } 2570 2571 if (sg_len == 0) { 2572 /* 2573 * End of scatter-gather segment; 2574 * proceed to the next one... 2575 */ 2576 if (i == ctl_sg_count - 1) { 2577 /* 2578 * ... unless this was the last one. 2579 */ 2580 break; 2581 } 2582 i++; 2583 } 2584 2585 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2586 /* 2587 * Can't stuff more data into the current PDU; 2588 * queue it. Note that's not enough to check 2589 * for kern_data_resid == 0 instead; there 2590 * may be several Data-In PDUs for the final 2591 * call to cfiscsi_datamove(), and we want 2592 * to set the F flag only on the last of them. 2593 */ 2594 buffer_offset += response->ip_data_len; 2595 if (buffer_offset == io->scsiio.kern_total_len || 2596 buffer_offset == expected_len) { 2597 buffer_offset -= response->ip_data_len; 2598 break; 2599 } 2600 cfiscsi_pdu_queue(response); 2601 response = NULL; 2602 bhsdi = NULL; 2603 } 2604 } 2605 if (response != NULL) { 2606 buffer_offset += response->ip_data_len; 2607 if (buffer_offset == io->scsiio.kern_total_len || 2608 buffer_offset == expected_len) { 2609 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2610 if (io->io_hdr.status == CTL_SUCCESS) { 2611 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2612 if (PDU_TOTAL_TRANSFER_LEN(request) < 2613 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2614 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2615 bhsdi->bhsdi_residual_count = 2616 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2617 PDU_TOTAL_TRANSFER_LEN(request)); 2618 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2619 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2620 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2621 bhsdi->bhsdi_residual_count = 2622 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2623 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2624 } 2625 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2626 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2627 } 2628 } 2629 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2630 cfiscsi_pdu_queue(response); 2631 } 2632 2633 io->scsiio.be_move_done(io); 2634} 2635 2636static void 2637cfiscsi_datamove_out(union ctl_io *io) 2638{ 2639 struct cfiscsi_session *cs; 2640 struct icl_pdu *request, *response; 2641 const struct iscsi_bhs_scsi_command *bhssc; 2642 struct iscsi_bhs_r2t *bhsr2t; 2643 struct cfiscsi_data_wait *cdw; 2644 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2645 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2646 uint32_t target_transfer_tag; 2647 bool done; 2648 2649 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2650 cs = PDU_SESSION(request); 2651 2652 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2653 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2654 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2655 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2656 2657 /* 2658 * We need to record it so that we can properly report 2659 * underflow/underflow. 2660 */ 2661 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2662 2663 /* 2664 * Complete write underflow. Not a single byte to read. Return. 2665 */ 2666 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2667 if (io->scsiio.kern_rel_offset >= expected_len) { 2668 io->scsiio.be_move_done(io); 2669 return; 2670 } 2671 datamove_len = MIN(io->scsiio.kern_data_len, 2672 expected_len - io->scsiio.kern_rel_offset); 2673 2674 target_transfer_tag = 2675 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2676 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2677 &target_transfer_tag); 2678 if (cdw == NULL) { 2679 CFISCSI_SESSION_WARN(cs, "failed to " 2680 "allocate memory; dropping connection"); 2681 ctl_set_busy(&io->scsiio); 2682 io->scsiio.be_move_done(io); 2683 cfiscsi_session_terminate(cs); 2684 return; 2685 } 2686#if 0 2687 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2688 "task tag 0x%x, target transfer tag 0x%x", 2689 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2690#endif 2691 2692 cdw->cdw_ctl_io = io; 2693 cdw->cdw_target_transfer_tag = target_transfer_tag; 2694 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2695 cdw->cdw_r2t_end = datamove_len; 2696 cdw->cdw_datasn = 0; 2697 2698 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2699 if (io->scsiio.kern_sg_entries > 0) { 2700 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2701 } else { 2702 ctl_sglist = &ctl_sg_entry; 2703 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2704 ctl_sglist->len = datamove_len; 2705 } 2706 cdw->cdw_sg_index = 0; 2707 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2708 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2709 r2t_off = io->scsiio.ext_data_filled; 2710 while (r2t_off > 0) { 2711 if (r2t_off >= cdw->cdw_sg_len) { 2712 r2t_off -= cdw->cdw_sg_len; 2713 cdw->cdw_sg_index++; 2714 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2715 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2716 continue; 2717 } 2718 cdw->cdw_sg_addr += r2t_off; 2719 cdw->cdw_sg_len -= r2t_off; 2720 r2t_off = 0; 2721 } 2722 2723 if (cs->cs_immediate_data && 2724 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2725 icl_pdu_data_segment_length(request)) { 2726 done = cfiscsi_handle_data_segment(request, cdw); 2727 if (done) { 2728 cfiscsi_data_wait_free(cs, cdw); 2729 io->scsiio.be_move_done(io); 2730 return; 2731 } 2732 } 2733 2734 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2735 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2736 cs->cs_max_burst_length); 2737 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2738 2739 CFISCSI_SESSION_LOCK(cs); 2740 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2741 CFISCSI_SESSION_UNLOCK(cs); 2742 2743 /* 2744 * XXX: We should limit the number of outstanding R2T PDUs 2745 * per task to MaxOutstandingR2T. 2746 */ 2747 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2748 if (response == NULL) { 2749 CFISCSI_SESSION_WARN(cs, "failed to " 2750 "allocate memory; dropping connection"); 2751 ctl_set_busy(&io->scsiio); 2752 io->scsiio.be_move_done(io); 2753 cfiscsi_session_terminate(cs); 2754 return; 2755 } 2756 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2757 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2758 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2759 bhsr2t->bhsr2t_flags = 0x80; 2760 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2761 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2762 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2763 /* 2764 * XXX: Here we assume that cfiscsi_datamove() won't ever 2765 * be running concurrently on several CPUs for a given 2766 * command. 2767 */ 2768 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2769 PDU_R2TSN(request)++; 2770 /* 2771 * This is the offset within the current SCSI command; 2772 * i.e. for the first call of datamove(), it will be 0, 2773 * and for subsequent ones it will be the sum of lengths 2774 * of previous ones. 2775 * 2776 * The ext_data_filled is to account for unsolicited 2777 * (immediate) data that might have already arrived. 2778 */ 2779 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2780 /* 2781 * This is the total length (sum of S/G lengths) this call 2782 * to cfiscsi_datamove() is supposed to handle, limited by 2783 * MaxBurstLength. 2784 */ 2785 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2786 cfiscsi_pdu_queue(response); 2787} 2788 2789static void 2790cfiscsi_datamove(union ctl_io *io) 2791{ 2792 2793 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2794 cfiscsi_datamove_in(io); 2795 else { 2796 /* We hadn't received anything during this datamove yet. */ 2797 io->scsiio.ext_data_filled = 0; 2798 cfiscsi_datamove_out(io); 2799 } 2800} 2801 2802static void 2803cfiscsi_scsi_command_done(union ctl_io *io) 2804{ 2805 struct icl_pdu *request, *response; 2806 struct iscsi_bhs_scsi_command *bhssc; 2807 struct iscsi_bhs_scsi_response *bhssr; 2808#ifdef DIAGNOSTIC 2809 struct cfiscsi_data_wait *cdw; 2810#endif 2811 struct cfiscsi_session *cs; 2812 uint16_t sense_length; 2813 2814 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2815 cs = PDU_SESSION(request); 2816 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2817 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2818 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2819 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2820 2821 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2822 // bhssc->bhssc_initiator_task_tag); 2823 2824#ifdef DIAGNOSTIC 2825 CFISCSI_SESSION_LOCK(cs); 2826 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2827 KASSERT(bhssc->bhssc_initiator_task_tag != 2828 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2829 CFISCSI_SESSION_UNLOCK(cs); 2830#endif 2831 2832 /* 2833 * Do not return status for aborted commands. 2834 * There are exceptions, but none supported by CTL yet. 2835 */ 2836 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2837 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2838 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2839 ctl_free_io(io); 2840 icl_pdu_free(request); 2841 return; 2842 } 2843 2844 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2845 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2846 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2847 bhssr->bhssr_flags = 0x80; 2848 /* 2849 * XXX: We don't deal with bidirectional under/overflows; 2850 * does anything actually support those? 2851 */ 2852 if (PDU_TOTAL_TRANSFER_LEN(request) < 2853 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2854 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2855 bhssr->bhssr_residual_count = 2856 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2857 PDU_TOTAL_TRANSFER_LEN(request)); 2858 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2859 // ntohl(bhssr->bhssr_residual_count)); 2860 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2861 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2862 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2863 bhssr->bhssr_residual_count = 2864 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2865 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2866 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2867 // ntohl(bhssr->bhssr_residual_count)); 2868 } 2869 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2870 bhssr->bhssr_status = io->scsiio.scsi_status; 2871 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2872 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2873 2874 if (io->scsiio.sense_len > 0) { 2875#if 0 2876 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2877 io->scsiio.sense_len); 2878#endif 2879 sense_length = htons(io->scsiio.sense_len); 2880 icl_pdu_append_data(response, 2881 &sense_length, sizeof(sense_length), M_WAITOK); 2882 icl_pdu_append_data(response, 2883 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2884 } 2885 2886 ctl_free_io(io); 2887 icl_pdu_free(request); 2888 cfiscsi_pdu_queue(response); 2889} 2890 2891static void 2892cfiscsi_task_management_done(union ctl_io *io) 2893{ 2894 struct icl_pdu *request, *response; 2895 struct iscsi_bhs_task_management_request *bhstmr; 2896 struct iscsi_bhs_task_management_response *bhstmr2; 2897 struct cfiscsi_data_wait *cdw, *tmpcdw; 2898 struct cfiscsi_session *cs, *tcs; 2899 struct cfiscsi_softc *softc; 2900 int cold_reset = 0; 2901 2902 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2903 cs = PDU_SESSION(request); 2904 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2905 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2906 ISCSI_BHS_OPCODE_TASK_REQUEST, 2907 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2908 2909#if 0 2910 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2911 bhstmr->bhstmr_initiator_task_tag, 2912 bhstmr->bhstmr_referenced_task_tag); 2913#endif 2914 2915 if ((bhstmr->bhstmr_function & ~0x80) == 2916 BHSTMR_FUNCTION_ABORT_TASK) { 2917 /* 2918 * Make sure we no longer wait for Data-Out for this command. 2919 */ 2920 CFISCSI_SESSION_LOCK(cs); 2921 TAILQ_FOREACH_SAFE(cdw, 2922 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2923 if (bhstmr->bhstmr_referenced_task_tag != 2924 cdw->cdw_initiator_task_tag) 2925 continue; 2926 2927#if 0 2928 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2929 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2930#endif 2931 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2932 cdw, cdw_next); 2933 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2934 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2935 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2936 cfiscsi_data_wait_free(cs, cdw); 2937 } 2938 CFISCSI_SESSION_UNLOCK(cs); 2939 } 2940 if ((bhstmr->bhstmr_function & ~0x80) == 2941 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2942 io->io_hdr.status == CTL_SUCCESS) 2943 cold_reset = 1; 2944 2945 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2946 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2947 response->ip_bhs; 2948 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2949 bhstmr2->bhstmr_flags = 0x80; 2950 switch (io->taskio.task_status) { 2951 case CTL_TASK_FUNCTION_COMPLETE: 2952 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2953 break; 2954 case CTL_TASK_FUNCTION_SUCCEEDED: 2955 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2956 break; 2957 case CTL_TASK_LUN_DOES_NOT_EXIST: 2958 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2959 break; 2960 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2961 default: 2962 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2963 break; 2964 } 2965 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2966 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2967 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2968 2969 ctl_free_io(io); 2970 icl_pdu_free(request); 2971 cfiscsi_pdu_queue(response); 2972 2973 if (cold_reset) { 2974 softc = cs->cs_target->ct_softc; 2975 mtx_lock(&softc->lock); 2976 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2977 if (tcs->cs_target == cs->cs_target) 2978 cfiscsi_session_terminate(tcs); 2979 } 2980 mtx_unlock(&softc->lock); 2981 } 2982} 2983 2984static void 2985cfiscsi_done(union ctl_io *io) 2986{ 2987 struct icl_pdu *request; 2988 struct cfiscsi_session *cs; 2989 2990 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2991 ("invalid CTL status %#x", io->io_hdr.status)); 2992 2993 if (io->io_hdr.io_type == CTL_IO_TASK && 2994 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2995 /* 2996 * Implicit task termination has just completed; nothing to do. 2997 */ 2998 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2999 cs->cs_tasks_aborted = true; 3000 refcount_release(&cs->cs_outstanding_ctl_pdus); 3001 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 3002 ctl_free_io(io); 3003 return; 3004 } 3005 3006 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 3007 cs = PDU_SESSION(request); 3008 3009 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 3010 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 3011 cfiscsi_scsi_command_done(io); 3012 break; 3013 case ISCSI_BHS_OPCODE_TASK_REQUEST: 3014 cfiscsi_task_management_done(io); 3015 break; 3016 default: 3017 panic("cfiscsi_done called with wrong opcode 0x%x", 3018 request->ip_bhs->bhs_opcode); 3019 } 3020 3021 refcount_release(&cs->cs_outstanding_ctl_pdus); 3022} 3023