ctl_frontend_iscsi.c revision 317320
1/*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 317320 2017-04-23 07:35:51Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 317320 2017-04-23 07:35:51Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capsicum.h> 41#include <sys/condvar.h> 42#include <sys/endian.h> 43#include <sys/file.h> 44#include <sys/kernel.h> 45#include <sys/kthread.h> 46#include <sys/lock.h> 47#include <sys/malloc.h> 48#include <sys/module.h> 49#include <sys/mutex.h> 50#include <sys/queue.h> 51#include <sys/sbuf.h> 52#include <sys/sysctl.h> 53#include <sys/systm.h> 54#include <sys/uio.h> 55#include <sys/unistd.h> 56#include <vm/uma.h> 57 58#include <cam/scsi/scsi_all.h> 59#include <cam/scsi/scsi_da.h> 60#include <cam/ctl/ctl_io.h> 61#include <cam/ctl/ctl.h> 62#include <cam/ctl/ctl_backend.h> 63#include <cam/ctl/ctl_error.h> 64#include <cam/ctl/ctl_frontend.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include <dev/iscsi/icl.h> 71#include <dev/iscsi/iscsi_proto.h> 72#include <cam/ctl/ctl_frontend_iscsi.h> 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 1; 88TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95static int login_timeout = 60; 96TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99static int maxcmdsn_delta = 256; 100TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105#define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113#define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130#define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145#define PDU_EXPDATASN(X) (X)->ip_prv0 146#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147#define PDU_R2TSN(X) (X)->ip_prv2 148 149static int cfiscsi_init(void); 150static int cfiscsi_shutdown(void); 151static void cfiscsi_online(void *arg); 152static void cfiscsi_offline(void *arg); 153static int cfiscsi_info(void *arg, struct sbuf *sb); 154static int cfiscsi_ioctl(struct cdev *dev, 155 u_long cmd, caddr_t addr, int flag, struct thread *td); 156static void cfiscsi_datamove(union ctl_io *io); 157static void cfiscsi_datamove_in(union ctl_io *io); 158static void cfiscsi_datamove_out(union ctl_io *io); 159static void cfiscsi_done(union ctl_io *io); 160static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 161static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 162static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 163static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 164static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 165static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 166static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 167static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 168 *softc, const char *name, uint16_t tag); 169static struct cfiscsi_target *cfiscsi_target_find_or_create( 170 struct cfiscsi_softc *softc, const char *name, const char *alias, 171 uint16_t tag); 172static void cfiscsi_target_release(struct cfiscsi_target *ct); 173static void cfiscsi_session_delete(struct cfiscsi_session *cs); 174 175static struct cfiscsi_softc cfiscsi_softc; 176 177static struct ctl_frontend cfiscsi_frontend = 178{ 179 .name = "iscsi", 180 .init = cfiscsi_init, 181 .ioctl = cfiscsi_ioctl, 182 .shutdown = cfiscsi_shutdown, 183}; 184CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 185MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 186 187static struct icl_pdu * 188cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 189{ 190 191 return (icl_pdu_new(request->ip_conn, flags)); 192} 193 194static bool 195cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 196{ 197 const struct iscsi_bhs_scsi_command *bhssc; 198 struct cfiscsi_session *cs; 199 uint32_t cmdsn, expstatsn; 200 201 cs = PDU_SESSION(request); 202 203 /* 204 * Every incoming PDU - not just NOP-Out - resets the ping timer. 205 * The purpose of the timeout is to reset the connection when it stalls; 206 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 207 * in some queue. 208 * 209 * XXX: Locking? 210 */ 211 cs->cs_timeout = 0; 212 213 /* 214 * Data-Out PDUs don't contain CmdSN. 215 */ 216 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 217 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 218 return (false); 219 220 /* 221 * We're only using fields common for all the request 222 * (initiator -> target) PDUs. 223 */ 224 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 225 cmdsn = ntohl(bhssc->bhssc_cmdsn); 226 expstatsn = ntohl(bhssc->bhssc_expstatsn); 227 228 CFISCSI_SESSION_LOCK(cs); 229#if 0 230 if (expstatsn != cs->cs_statsn) { 231 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 232 "while current StatSN is %d", expstatsn, 233 cs->cs_statsn); 234 } 235#endif 236 237 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 238 /* 239 * The target MUST silently ignore any non-immediate command 240 * outside of this range. 241 */ 242 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 243 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 244 CFISCSI_SESSION_UNLOCK(cs); 245 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 246 "while expected %u", cmdsn, cs->cs_cmdsn); 247 return (true); 248 } 249 250 /* 251 * We don't support multiple connections now, so any 252 * discontinuity in CmdSN means lost PDUs. Since we don't 253 * support PDU retransmission -- terminate the connection. 254 */ 255 if (cmdsn != cs->cs_cmdsn) { 256 CFISCSI_SESSION_UNLOCK(cs); 257 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 258 "while expected %u; dropping connection", 259 cmdsn, cs->cs_cmdsn); 260 cfiscsi_session_terminate(cs); 261 return (true); 262 } 263 cs->cs_cmdsn++; 264 } 265 266 CFISCSI_SESSION_UNLOCK(cs); 267 268 return (false); 269} 270 271static void 272cfiscsi_pdu_handle(struct icl_pdu *request) 273{ 274 struct cfiscsi_session *cs; 275 bool ignore; 276 277 cs = PDU_SESSION(request); 278 279 ignore = cfiscsi_pdu_update_cmdsn(request); 280 if (ignore) { 281 icl_pdu_free(request); 282 return; 283 } 284 285 /* 286 * Handle the PDU; this includes e.g. receiving the remaining 287 * part of PDU and submitting the SCSI command to CTL 288 * or queueing a reply. The handling routine is responsible 289 * for freeing the PDU when it's no longer needed. 290 */ 291 switch (request->ip_bhs->bhs_opcode & 292 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 293 case ISCSI_BHS_OPCODE_NOP_OUT: 294 cfiscsi_pdu_handle_nop_out(request); 295 break; 296 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 297 cfiscsi_pdu_handle_scsi_command(request); 298 break; 299 case ISCSI_BHS_OPCODE_TASK_REQUEST: 300 cfiscsi_pdu_handle_task_request(request); 301 break; 302 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 303 cfiscsi_pdu_handle_data_out(request); 304 break; 305 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 306 cfiscsi_pdu_handle_logout_request(request); 307 break; 308 default: 309 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 310 "opcode 0x%x; dropping connection", 311 request->ip_bhs->bhs_opcode); 312 icl_pdu_free(request); 313 cfiscsi_session_terminate(cs); 314 } 315 316} 317 318static void 319cfiscsi_receive_callback(struct icl_pdu *request) 320{ 321#ifdef ICL_KERNEL_PROXY 322 struct cfiscsi_session *cs; 323 324 cs = PDU_SESSION(request); 325 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 326 if (cs->cs_login_pdu == NULL) 327 cs->cs_login_pdu = request; 328 else 329 icl_pdu_free(request); 330 cv_signal(&cs->cs_login_cv); 331 return; 332 } 333#endif 334 335 cfiscsi_pdu_handle(request); 336} 337 338static void 339cfiscsi_error_callback(struct icl_conn *ic) 340{ 341 struct cfiscsi_session *cs; 342 343 cs = CONN_SESSION(ic); 344 345 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 346 cfiscsi_session_terminate(cs); 347} 348 349static int 350cfiscsi_pdu_prepare(struct icl_pdu *response) 351{ 352 struct cfiscsi_session *cs; 353 struct iscsi_bhs_scsi_response *bhssr; 354 bool advance_statsn = true; 355 356 cs = PDU_SESSION(response); 357 358 CFISCSI_SESSION_LOCK_ASSERT(cs); 359 360 /* 361 * We're only using fields common for all the response 362 * (target -> initiator) PDUs. 363 */ 364 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 365 366 /* 367 * 10.8.3: "The StatSN for this connection is not advanced 368 * after this PDU is sent." 369 */ 370 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 371 advance_statsn = false; 372 373 /* 374 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 375 * StatSN for the connection is not advanced after this PDU is sent." 376 */ 377 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 378 bhssr->bhssr_initiator_task_tag == 0xffffffff) 379 advance_statsn = false; 380 381 /* 382 * See the comment below - StatSN is not meaningful and must 383 * not be advanced. 384 */ 385 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 386 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 387 advance_statsn = false; 388 389 /* 390 * 10.7.3: "The fields StatSN, Status, and Residual Count 391 * only have meaningful content if the S bit is set to 1." 392 */ 393 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 394 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 395 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 396 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 397 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 398 399 if (advance_statsn) 400 cs->cs_statsn++; 401 402 return (0); 403} 404 405static void 406cfiscsi_pdu_queue(struct icl_pdu *response) 407{ 408 struct cfiscsi_session *cs; 409 410 cs = PDU_SESSION(response); 411 412 CFISCSI_SESSION_LOCK(cs); 413 cfiscsi_pdu_prepare(response); 414 icl_pdu_queue(response); 415 CFISCSI_SESSION_UNLOCK(cs); 416} 417 418static void 419cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 420{ 421 struct cfiscsi_session *cs; 422 struct iscsi_bhs_nop_out *bhsno; 423 struct iscsi_bhs_nop_in *bhsni; 424 struct icl_pdu *response; 425 void *data = NULL; 426 size_t datasize; 427 int error; 428 429 cs = PDU_SESSION(request); 430 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 431 432 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 433 /* 434 * Nothing to do, iscsi_pdu_update_statsn() already 435 * zeroed the timeout. 436 */ 437 icl_pdu_free(request); 438 return; 439 } 440 441 datasize = icl_pdu_data_segment_length(request); 442 if (datasize > 0) { 443 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 444 if (data == NULL) { 445 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 446 "dropping connection"); 447 icl_pdu_free(request); 448 cfiscsi_session_terminate(cs); 449 return; 450 } 451 icl_pdu_get_data(request, 0, data, datasize); 452 } 453 454 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 455 if (response == NULL) { 456 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 457 "droppping connection"); 458 free(data, M_CFISCSI); 459 icl_pdu_free(request); 460 cfiscsi_session_terminate(cs); 461 return; 462 } 463 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 464 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 465 bhsni->bhsni_flags = 0x80; 466 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 467 bhsni->bhsni_target_transfer_tag = 0xffffffff; 468 if (datasize > 0) { 469 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 470 if (error != 0) { 471 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 472 "dropping connection"); 473 free(data, M_CFISCSI); 474 icl_pdu_free(request); 475 icl_pdu_free(response); 476 cfiscsi_session_terminate(cs); 477 return; 478 } 479 free(data, M_CFISCSI); 480 } 481 482 icl_pdu_free(request); 483 cfiscsi_pdu_queue(response); 484} 485 486static void 487cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 488{ 489 struct iscsi_bhs_scsi_command *bhssc; 490 struct cfiscsi_session *cs; 491 union ctl_io *io; 492 int error; 493 494 cs = PDU_SESSION(request); 495 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 496 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 497 // bhssc->bhssc_initiator_task_tag); 498 499 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 500 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 501 "ImmediateData=No; dropping connection"); 502 icl_pdu_free(request); 503 cfiscsi_session_terminate(cs); 504 return; 505 } 506 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 507 ctl_zero_io(io); 508 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 509 io->io_hdr.io_type = CTL_IO_SCSI; 510 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 511 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 512 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 513 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 514 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 515 case BHSSC_FLAGS_ATTR_UNTAGGED: 516 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 517 break; 518 case BHSSC_FLAGS_ATTR_SIMPLE: 519 io->scsiio.tag_type = CTL_TAG_SIMPLE; 520 break; 521 case BHSSC_FLAGS_ATTR_ORDERED: 522 io->scsiio.tag_type = CTL_TAG_ORDERED; 523 break; 524 case BHSSC_FLAGS_ATTR_HOQ: 525 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 526 break; 527 case BHSSC_FLAGS_ATTR_ACA: 528 io->scsiio.tag_type = CTL_TAG_ACA; 529 break; 530 default: 531 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 532 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 533 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 534 break; 535 } 536 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 537 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 538 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 539 error = ctl_queue(io); 540 if (error != CTL_RETVAL_COMPLETE) { 541 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 542 "dropping connection", error); 543 ctl_free_io(io); 544 refcount_release(&cs->cs_outstanding_ctl_pdus); 545 icl_pdu_free(request); 546 cfiscsi_session_terminate(cs); 547 } 548} 549 550static void 551cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 552{ 553 struct iscsi_bhs_task_management_request *bhstmr; 554 struct iscsi_bhs_task_management_response *bhstmr2; 555 struct icl_pdu *response; 556 struct cfiscsi_session *cs; 557 union ctl_io *io; 558 int error; 559 560 cs = PDU_SESSION(request); 561 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 562 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 563 ctl_zero_io(io); 564 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 565 io->io_hdr.io_type = CTL_IO_TASK; 566 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 567 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 568 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 569 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 570 571 switch (bhstmr->bhstmr_function & ~0x80) { 572 case BHSTMR_FUNCTION_ABORT_TASK: 573#if 0 574 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 575#endif 576 io->taskio.task_action = CTL_TASK_ABORT_TASK; 577 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 578 break; 579 case BHSTMR_FUNCTION_ABORT_TASK_SET: 580#if 0 581 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 582#endif 583 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 584 break; 585 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 586#if 0 587 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 588#endif 589 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 590 break; 591 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 592#if 0 593 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 594#endif 595 io->taskio.task_action = CTL_TASK_LUN_RESET; 596 break; 597 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 598#if 0 599 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 600#endif 601 io->taskio.task_action = CTL_TASK_TARGET_RESET; 602 break; 603 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 604#if 0 605 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 606#endif 607 io->taskio.task_action = CTL_TASK_TARGET_RESET; 608 break; 609 case BHSTMR_FUNCTION_QUERY_TASK: 610#if 0 611 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 612#endif 613 io->taskio.task_action = CTL_TASK_QUERY_TASK; 614 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 615 break; 616 case BHSTMR_FUNCTION_QUERY_TASK_SET: 617#if 0 618 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 619#endif 620 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 621 break; 622 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 623#if 0 624 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 625#endif 626 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 627 break; 628 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 629#if 0 630 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 631#endif 632 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 633 break; 634 default: 635 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 636 bhstmr->bhstmr_function & ~0x80); 637 ctl_free_io(io); 638 639 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 640 if (response == NULL) { 641 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 642 "dropping connection"); 643 icl_pdu_free(request); 644 cfiscsi_session_terminate(cs); 645 return; 646 } 647 bhstmr2 = (struct iscsi_bhs_task_management_response *) 648 response->ip_bhs; 649 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 650 bhstmr2->bhstmr_flags = 0x80; 651 bhstmr2->bhstmr_response = 652 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 653 bhstmr2->bhstmr_initiator_task_tag = 654 bhstmr->bhstmr_initiator_task_tag; 655 icl_pdu_free(request); 656 cfiscsi_pdu_queue(response); 657 return; 658 } 659 660 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 661 error = ctl_queue(io); 662 if (error != CTL_RETVAL_COMPLETE) { 663 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 664 "dropping connection", error); 665 ctl_free_io(io); 666 refcount_release(&cs->cs_outstanding_ctl_pdus); 667 icl_pdu_free(request); 668 cfiscsi_session_terminate(cs); 669 } 670} 671 672static bool 673cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 674{ 675 struct iscsi_bhs_data_out *bhsdo; 676 struct cfiscsi_session *cs; 677 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 678 size_t copy_len, len, off, buffer_offset; 679 int ctl_sg_count; 680 union ctl_io *io; 681 682 cs = PDU_SESSION(request); 683 684 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 685 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 686 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 687 ISCSI_BHS_OPCODE_SCSI_COMMAND, 688 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 689 690 /* 691 * We're only using fields common for Data-Out and SCSI Command PDUs. 692 */ 693 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 694 695 io = cdw->cdw_ctl_io; 696 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 697 ("CTL_FLAG_DATA_IN")); 698 699#if 0 700 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 701 request->ip_data_len, io->scsiio.kern_total_len); 702#endif 703 704 if (io->scsiio.kern_sg_entries > 0) { 705 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 706 ctl_sg_count = io->scsiio.kern_sg_entries; 707 } else { 708 ctl_sglist = &ctl_sg_entry; 709 ctl_sglist->addr = io->scsiio.kern_data_ptr; 710 ctl_sglist->len = io->scsiio.kern_data_len; 711 ctl_sg_count = 1; 712 } 713 714 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 715 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 716 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 717 else 718 buffer_offset = 0; 719 len = icl_pdu_data_segment_length(request); 720 721 /* 722 * Make sure the offset, as sent by the initiator, matches the offset 723 * we're supposed to be at in the scatter-gather list. 724 */ 725 if (buffer_offset > 726 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 727 buffer_offset + len <= 728 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 729 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 730 "expected %zd; dropping connection", buffer_offset, 731 (size_t)io->scsiio.kern_rel_offset + 732 (size_t)io->scsiio.ext_data_filled); 733 ctl_set_data_phase_error(&io->scsiio); 734 cfiscsi_session_terminate(cs); 735 return (true); 736 } 737 738 /* 739 * This is the offset within the PDU data segment, as opposed 740 * to buffer_offset, which is the offset within the task (SCSI 741 * command). 742 */ 743 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 744 buffer_offset; 745 746 /* 747 * Iterate over the scatter/gather segments, filling them with data 748 * from the PDU data segment. Note that this can get called multiple 749 * times for one SCSI command; the cdw structure holds state for the 750 * scatter/gather list. 751 */ 752 for (;;) { 753 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 754 ("cdw->cdw_sg_index >= ctl_sg_count")); 755 if (cdw->cdw_sg_len == 0) { 756 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 757 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 758 } 759 KASSERT(off <= len, ("len > off")); 760 copy_len = len - off; 761 if (copy_len > cdw->cdw_sg_len) 762 copy_len = cdw->cdw_sg_len; 763 764 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 765 cdw->cdw_sg_addr += copy_len; 766 cdw->cdw_sg_len -= copy_len; 767 off += copy_len; 768 io->scsiio.ext_data_filled += copy_len; 769 io->scsiio.kern_data_resid -= copy_len; 770 771 if (cdw->cdw_sg_len == 0) { 772 /* 773 * End of current segment. 774 */ 775 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 776 /* 777 * Last segment in scatter/gather list. 778 */ 779 break; 780 } 781 cdw->cdw_sg_index++; 782 } 783 784 if (off == len) { 785 /* 786 * End of PDU payload. 787 */ 788 break; 789 } 790 } 791 792 if (len > off) { 793 /* 794 * In case of unsolicited data, it's possible that the buffer 795 * provided by CTL is smaller than negotiated FirstBurstLength. 796 * Just ignore the superfluous data; will ask for them with R2T 797 * on next call to cfiscsi_datamove(). 798 * 799 * This obviously can only happen with SCSI Command PDU. 800 */ 801 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 802 ISCSI_BHS_OPCODE_SCSI_COMMAND) 803 return (true); 804 805 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 806 "expected %zd; dropping connection", 807 icl_pdu_data_segment_length(request), off); 808 ctl_set_data_phase_error(&io->scsiio); 809 cfiscsi_session_terminate(cs); 810 return (true); 811 } 812 813 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 814 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 815 CFISCSI_SESSION_WARN(cs, "got the final packet without " 816 "the F flag; flags = 0x%x; dropping connection", 817 bhsdo->bhsdo_flags); 818 ctl_set_data_phase_error(&io->scsiio); 819 cfiscsi_session_terminate(cs); 820 return (true); 821 } 822 823 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 824 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 825 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 826 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 827 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 828 "transmitted size was %zd bytes instead of %d; " 829 "dropping connection", 830 (size_t)io->scsiio.ext_data_filled, 831 cdw->cdw_r2t_end); 832 ctl_set_data_phase_error(&io->scsiio); 833 cfiscsi_session_terminate(cs); 834 return (true); 835 } else { 836 /* 837 * For SCSI Command PDU, this just means we need to 838 * solicit more data by sending R2T. 839 */ 840 return (false); 841 } 842 } 843 844 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 845#if 0 846 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 847 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 848#endif 849 850 return (true); 851 } 852 853 return (false); 854} 855 856static void 857cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 858{ 859 struct iscsi_bhs_data_out *bhsdo; 860 struct cfiscsi_session *cs; 861 struct cfiscsi_data_wait *cdw = NULL; 862 union ctl_io *io; 863 bool done; 864 865 cs = PDU_SESSION(request); 866 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 867 868 CFISCSI_SESSION_LOCK(cs); 869 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 870#if 0 871 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 872 "ttt 0x%x, itt 0x%x", 873 bhsdo->bhsdo_target_transfer_tag, 874 bhsdo->bhsdo_initiator_task_tag, 875 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 876#endif 877 if (bhsdo->bhsdo_target_transfer_tag == 878 cdw->cdw_target_transfer_tag) 879 break; 880 } 881 CFISCSI_SESSION_UNLOCK(cs); 882 if (cdw == NULL) { 883 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 884 "0x%x, not found; dropping connection", 885 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 886 icl_pdu_free(request); 887 cfiscsi_session_terminate(cs); 888 return; 889 } 890 891 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 892 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 893 "DataSN %u, while expected %u; dropping connection", 894 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 895 icl_pdu_free(request); 896 cfiscsi_session_terminate(cs); 897 return; 898 } 899 cdw->cdw_datasn++; 900 901 io = cdw->cdw_ctl_io; 902 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 903 ("CTL_FLAG_DATA_IN")); 904 905 done = cfiscsi_handle_data_segment(request, cdw); 906 if (done) { 907 CFISCSI_SESSION_LOCK(cs); 908 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 909 CFISCSI_SESSION_UNLOCK(cs); 910 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 911 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 912 uma_zfree(cfiscsi_data_wait_zone, cdw); 913 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 914 if (done) 915 io->scsiio.be_move_done(io); 916 else 917 cfiscsi_datamove_out(io); 918 } 919 920 icl_pdu_free(request); 921} 922 923static void 924cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 925{ 926 struct iscsi_bhs_logout_request *bhslr; 927 struct iscsi_bhs_logout_response *bhslr2; 928 struct icl_pdu *response; 929 struct cfiscsi_session *cs; 930 931 cs = PDU_SESSION(request); 932 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 933 switch (bhslr->bhslr_reason & 0x7f) { 934 case BHSLR_REASON_CLOSE_SESSION: 935 case BHSLR_REASON_CLOSE_CONNECTION: 936 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 937 if (response == NULL) { 938 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 939 icl_pdu_free(request); 940 cfiscsi_session_terminate(cs); 941 return; 942 } 943 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 944 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 945 bhslr2->bhslr_flags = 0x80; 946 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 947 bhslr2->bhslr_initiator_task_tag = 948 bhslr->bhslr_initiator_task_tag; 949 icl_pdu_free(request); 950 cfiscsi_pdu_queue(response); 951 cfiscsi_session_terminate(cs); 952 break; 953 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 954 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 955 if (response == NULL) { 956 CFISCSI_SESSION_WARN(cs, 957 "failed to allocate memory; dropping connection"); 958 icl_pdu_free(request); 959 cfiscsi_session_terminate(cs); 960 return; 961 } 962 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 963 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 964 bhslr2->bhslr_flags = 0x80; 965 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 966 bhslr2->bhslr_initiator_task_tag = 967 bhslr->bhslr_initiator_task_tag; 968 icl_pdu_free(request); 969 cfiscsi_pdu_queue(response); 970 break; 971 default: 972 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 973 bhslr->bhslr_reason); 974 icl_pdu_free(request); 975 cfiscsi_session_terminate(cs); 976 break; 977 } 978} 979 980static void 981cfiscsi_callout(void *context) 982{ 983 struct icl_pdu *cp; 984 struct iscsi_bhs_nop_in *bhsni; 985 struct cfiscsi_session *cs; 986 987 cs = context; 988 989 if (cs->cs_terminating) 990 return; 991 992 callout_schedule(&cs->cs_callout, 1 * hz); 993 994 atomic_add_int(&cs->cs_timeout, 1); 995 996#ifdef ICL_KERNEL_PROXY 997 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 998 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 999 CFISCSI_SESSION_WARN(cs, "login timed out after " 1000 "%d seconds; dropping connection", cs->cs_timeout); 1001 cfiscsi_session_terminate(cs); 1002 } 1003 return; 1004 } 1005#endif 1006 1007 if (ping_timeout <= 0) { 1008 /* 1009 * Pings are disabled. Don't send NOP-In in this case; 1010 * user might have disabled pings to work around problems 1011 * with certain initiators that can't properly handle 1012 * NOP-In, such as iPXE. Reset the timeout, to avoid 1013 * triggering reconnection, should the user decide to 1014 * reenable them. 1015 */ 1016 cs->cs_timeout = 0; 1017 return; 1018 } 1019 1020 if (cs->cs_timeout >= ping_timeout) { 1021 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1022 "dropping connection", ping_timeout); 1023 cfiscsi_session_terminate(cs); 1024 return; 1025 } 1026 1027 /* 1028 * If the ping was reset less than one second ago - which means 1029 * that we've received some PDU during the last second - assume 1030 * the traffic flows correctly and don't bother sending a NOP-Out. 1031 * 1032 * (It's 2 - one for one second, and one for incrementing is_timeout 1033 * earlier in this routine.) 1034 */ 1035 if (cs->cs_timeout < 2) 1036 return; 1037 1038 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1039 if (cp == NULL) { 1040 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1041 return; 1042 } 1043 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1044 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1045 bhsni->bhsni_flags = 0x80; 1046 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1047 1048 cfiscsi_pdu_queue(cp); 1049} 1050 1051static void 1052cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1053{ 1054 struct cfiscsi_data_wait *cdw; 1055 union ctl_io *io; 1056 int error, last, wait; 1057 1058 if (cs->cs_target == NULL) 1059 return; /* No target yet, so nothing to do. */ 1060 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1061 ctl_zero_io(io); 1062 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1063 io->io_hdr.io_type = CTL_IO_TASK; 1064 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1065 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1066 io->io_hdr.nexus.targ_lun = 0; 1067 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1068 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1069 wait = cs->cs_outstanding_ctl_pdus; 1070 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1071 error = ctl_queue(io); 1072 if (error != CTL_RETVAL_COMPLETE) { 1073 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1074 refcount_release(&cs->cs_outstanding_ctl_pdus); 1075 ctl_free_io(io); 1076 } 1077 1078 CFISCSI_SESSION_LOCK(cs); 1079 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1080 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1081 CFISCSI_SESSION_UNLOCK(cs); 1082 /* 1083 * Set nonzero port status; this prevents backends from 1084 * assuming that the data transfer actually succeeded 1085 * and writing uninitialized data to disk. 1086 */ 1087 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1088 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1089 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1090 uma_zfree(cfiscsi_data_wait_zone, cdw); 1091 CFISCSI_SESSION_LOCK(cs); 1092 } 1093 CFISCSI_SESSION_UNLOCK(cs); 1094 1095 /* 1096 * Wait for CTL to terminate all the tasks. 1097 */ 1098 if (wait > 0) 1099 CFISCSI_SESSION_WARN(cs, 1100 "waiting for CTL to terminate %d tasks", wait); 1101 for (;;) { 1102 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1103 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1104 if (last != 0) 1105 break; 1106 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1107 0, "cfiscsi_terminate", hz / 100); 1108 } 1109 if (wait > 0) 1110 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1111} 1112 1113static void 1114cfiscsi_maintenance_thread(void *arg) 1115{ 1116 struct cfiscsi_session *cs; 1117 1118 cs = arg; 1119 1120 for (;;) { 1121 CFISCSI_SESSION_LOCK(cs); 1122 if (cs->cs_terminating == false) 1123 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1124 CFISCSI_SESSION_UNLOCK(cs); 1125 1126 if (cs->cs_terminating) { 1127 1128 /* 1129 * We used to wait up to 30 seconds to deliver queued 1130 * PDUs to the initiator. We also tried hard to deliver 1131 * SCSI Responses for the aborted PDUs. We don't do 1132 * that anymore. We might need to revisit that. 1133 */ 1134 callout_drain(&cs->cs_callout); 1135 icl_conn_close(cs->cs_conn); 1136 1137 /* 1138 * At this point ICL receive thread is no longer 1139 * running; no new tasks can be queued. 1140 */ 1141 cfiscsi_session_terminate_tasks(cs); 1142 cfiscsi_session_delete(cs); 1143 kthread_exit(); 1144 return; 1145 } 1146 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1147 } 1148} 1149 1150static void 1151cfiscsi_session_terminate(struct cfiscsi_session *cs) 1152{ 1153 1154 if (cs->cs_terminating) 1155 return; 1156 cs->cs_terminating = true; 1157 cv_signal(&cs->cs_maintenance_cv); 1158#ifdef ICL_KERNEL_PROXY 1159 cv_signal(&cs->cs_login_cv); 1160#endif 1161} 1162 1163static int 1164cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1165{ 1166 struct cfiscsi_target *ct; 1167 char *name; 1168 int i; 1169 1170 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1171 1172 ct = cs->cs_target; 1173 name = strdup(cs->cs_initiator_id, M_CTL); 1174 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1175 if (i < 0) { 1176 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1177 i); 1178 cs->cs_ctl_initid = -1; 1179 return (1); 1180 } 1181 cs->cs_ctl_initid = i; 1182#if 0 1183 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1184#endif 1185 1186 return (0); 1187} 1188 1189static void 1190cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1191{ 1192 int error; 1193 1194 if (cs->cs_ctl_initid == -1) 1195 return; 1196 1197 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1198 if (error != 0) { 1199 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1200 error); 1201 } 1202 cs->cs_ctl_initid = -1; 1203} 1204 1205static struct cfiscsi_session * 1206cfiscsi_session_new(struct cfiscsi_softc *softc) 1207{ 1208 struct cfiscsi_session *cs; 1209 int error; 1210 1211 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1212 if (cs == NULL) { 1213 CFISCSI_WARN("malloc failed"); 1214 return (NULL); 1215 } 1216 cs->cs_ctl_initid = -1; 1217 1218 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1219 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1220 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1221 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1222#ifdef ICL_KERNEL_PROXY 1223 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1224#endif 1225 1226 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1227 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1228 cs->cs_conn->ic_error = cfiscsi_error_callback; 1229 cs->cs_conn->ic_prv0 = cs; 1230 1231 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1232 if (error != 0) { 1233 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1234 free(cs, M_CFISCSI); 1235 return (NULL); 1236 } 1237 1238 mtx_lock(&softc->lock); 1239 cs->cs_id = ++softc->last_session_id; 1240 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1241 mtx_unlock(&softc->lock); 1242 1243 /* 1244 * Start pinging the initiator. 1245 */ 1246 callout_init(&cs->cs_callout, 1); 1247 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1248 1249 return (cs); 1250} 1251 1252static void 1253cfiscsi_session_delete(struct cfiscsi_session *cs) 1254{ 1255 struct cfiscsi_softc *softc; 1256 1257 softc = &cfiscsi_softc; 1258 1259 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1260 ("destroying session with outstanding CTL pdus")); 1261 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1262 ("destroying session with non-empty queue")); 1263 1264 cfiscsi_session_unregister_initiator(cs); 1265 if (cs->cs_target != NULL) 1266 cfiscsi_target_release(cs->cs_target); 1267 icl_conn_close(cs->cs_conn); 1268 icl_conn_free(cs->cs_conn); 1269 1270 mtx_lock(&softc->lock); 1271 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1272 cv_signal(&softc->sessions_cv); 1273 mtx_unlock(&softc->lock); 1274 1275 free(cs, M_CFISCSI); 1276} 1277 1278static int 1279cfiscsi_init(void) 1280{ 1281 struct cfiscsi_softc *softc; 1282 1283 softc = &cfiscsi_softc; 1284 bzero(softc, sizeof(*softc)); 1285 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1286 1287 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1288#ifdef ICL_KERNEL_PROXY 1289 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1290#endif 1291 TAILQ_INIT(&softc->sessions); 1292 TAILQ_INIT(&softc->targets); 1293 1294 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1295 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1296 UMA_ALIGN_PTR, 0); 1297 1298 return (0); 1299} 1300 1301static int 1302cfiscsi_shutdown(void) 1303{ 1304 struct cfiscsi_softc *softc = &cfiscsi_softc; 1305 1306 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) 1307 return (EBUSY); 1308 1309 uma_zdestroy(cfiscsi_data_wait_zone); 1310#ifdef ICL_KERNEL_PROXY 1311 cv_destroy(&softc->accept_cv); 1312#endif 1313 cv_destroy(&softc->sessions_cv); 1314 mtx_destroy(&softc->lock); 1315 return (0); 1316} 1317 1318#ifdef ICL_KERNEL_PROXY 1319static void 1320cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1321{ 1322 struct cfiscsi_session *cs; 1323 1324 cs = cfiscsi_session_new(&cfiscsi_softc); 1325 if (cs == NULL) { 1326 CFISCSI_WARN("failed to create session"); 1327 return; 1328 } 1329 1330 icl_conn_handoff_sock(cs->cs_conn, so); 1331 cs->cs_initiator_sa = sa; 1332 cs->cs_portal_id = portal_id; 1333 cs->cs_waiting_for_ctld = true; 1334 cv_signal(&cfiscsi_softc.accept_cv); 1335} 1336#endif 1337 1338static void 1339cfiscsi_online(void *arg) 1340{ 1341 struct cfiscsi_softc *softc; 1342 struct cfiscsi_target *ct; 1343 int online; 1344 1345 ct = (struct cfiscsi_target *)arg; 1346 softc = ct->ct_softc; 1347 1348 mtx_lock(&softc->lock); 1349 if (ct->ct_online) { 1350 mtx_unlock(&softc->lock); 1351 return; 1352 } 1353 ct->ct_online = 1; 1354 online = softc->online++; 1355 mtx_unlock(&softc->lock); 1356 if (online > 0) 1357 return; 1358 1359#ifdef ICL_KERNEL_PROXY 1360 if (softc->listener != NULL) 1361 icl_listen_free(softc->listener); 1362 softc->listener = icl_listen_new(cfiscsi_accept); 1363#endif 1364} 1365 1366static void 1367cfiscsi_offline(void *arg) 1368{ 1369 struct cfiscsi_softc *softc; 1370 struct cfiscsi_target *ct; 1371 struct cfiscsi_session *cs; 1372 int online; 1373 1374 ct = (struct cfiscsi_target *)arg; 1375 softc = ct->ct_softc; 1376 1377 mtx_lock(&softc->lock); 1378 if (!ct->ct_online) { 1379 mtx_unlock(&softc->lock); 1380 return; 1381 } 1382 ct->ct_online = 0; 1383 online = --softc->online; 1384 1385 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1386 if (cs->cs_target == ct) 1387 cfiscsi_session_terminate(cs); 1388 } 1389 do { 1390 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1391 if (cs->cs_target == ct) 1392 break; 1393 } 1394 if (cs != NULL) 1395 cv_wait(&softc->sessions_cv, &softc->lock); 1396 } while (cs != NULL && ct->ct_online == 0); 1397 mtx_unlock(&softc->lock); 1398 if (online > 0) 1399 return; 1400 1401#ifdef ICL_KERNEL_PROXY 1402 icl_listen_free(softc->listener); 1403 softc->listener = NULL; 1404#endif 1405} 1406 1407static int 1408cfiscsi_info(void *arg, struct sbuf *sb) 1409{ 1410 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1411 int retval; 1412 1413 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1414 ct->ct_state); 1415 return (retval); 1416} 1417 1418static void 1419cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1420{ 1421 struct cfiscsi_softc *softc; 1422 struct cfiscsi_session *cs, *cs2; 1423 struct cfiscsi_target *ct; 1424 struct ctl_iscsi_handoff_params *cihp; 1425 int error; 1426 1427 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1428 softc = &cfiscsi_softc; 1429 1430 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1431 cihp->initiator_name, cihp->initiator_addr, 1432 cihp->target_name); 1433 1434 ct = cfiscsi_target_find(softc, cihp->target_name, 1435 cihp->portal_group_tag); 1436 if (ct == NULL) { 1437 ci->status = CTL_ISCSI_ERROR; 1438 snprintf(ci->error_str, sizeof(ci->error_str), 1439 "%s: target not found", __func__); 1440 return; 1441 } 1442 1443#ifdef ICL_KERNEL_PROXY 1444 if (cihp->socket > 0 && cihp->connection_id > 0) { 1445 snprintf(ci->error_str, sizeof(ci->error_str), 1446 "both socket and connection_id set"); 1447 ci->status = CTL_ISCSI_ERROR; 1448 cfiscsi_target_release(ct); 1449 return; 1450 } 1451 if (cihp->socket == 0) { 1452 mtx_lock(&cfiscsi_softc.lock); 1453 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1454 if (cs->cs_id == cihp->connection_id) 1455 break; 1456 } 1457 if (cs == NULL) { 1458 mtx_unlock(&cfiscsi_softc.lock); 1459 snprintf(ci->error_str, sizeof(ci->error_str), 1460 "connection not found"); 1461 ci->status = CTL_ISCSI_ERROR; 1462 cfiscsi_target_release(ct); 1463 return; 1464 } 1465 mtx_unlock(&cfiscsi_softc.lock); 1466 } else { 1467#endif 1468 cs = cfiscsi_session_new(softc); 1469 if (cs == NULL) { 1470 ci->status = CTL_ISCSI_ERROR; 1471 snprintf(ci->error_str, sizeof(ci->error_str), 1472 "%s: cfiscsi_session_new failed", __func__); 1473 cfiscsi_target_release(ct); 1474 return; 1475 } 1476#ifdef ICL_KERNEL_PROXY 1477 } 1478#endif 1479 1480 /* 1481 * First PDU of Full Feature phase has the same CmdSN as the last 1482 * PDU from the Login Phase received from the initiator. Thus, 1483 * the -1 below. 1484 */ 1485 cs->cs_cmdsn = cihp->cmdsn; 1486 cs->cs_statsn = cihp->statsn; 1487 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1488 cs->cs_max_burst_length = cihp->max_burst_length; 1489 cs->cs_immediate_data = !!cihp->immediate_data; 1490 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1491 cs->cs_conn->ic_header_crc32c = true; 1492 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1493 cs->cs_conn->ic_data_crc32c = true; 1494 1495 strlcpy(cs->cs_initiator_name, 1496 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1497 strlcpy(cs->cs_initiator_addr, 1498 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1499 strlcpy(cs->cs_initiator_alias, 1500 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1501 memcpy(cs->cs_initiator_isid, 1502 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1503 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1504 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1505 cihp->initiator_isid[0], cihp->initiator_isid[1], 1506 cihp->initiator_isid[2], cihp->initiator_isid[3], 1507 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1508 1509 mtx_lock(&softc->lock); 1510 if (ct->ct_online == 0) { 1511 mtx_unlock(&softc->lock); 1512 cfiscsi_session_terminate(cs); 1513 cfiscsi_target_release(ct); 1514 ci->status = CTL_ISCSI_ERROR; 1515 snprintf(ci->error_str, sizeof(ci->error_str), 1516 "%s: port offline", __func__); 1517 return; 1518 } 1519 cs->cs_target = ct; 1520 mtx_unlock(&softc->lock); 1521 1522 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1523restart: 1524 if (!cs->cs_terminating) { 1525 mtx_lock(&softc->lock); 1526 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1527 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1528 cs->cs_target == cs2->cs_target && 1529 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1530 if (strcmp(cs->cs_initiator_addr, 1531 cs2->cs_initiator_addr) != 0) { 1532 CFISCSI_SESSION_WARN(cs2, 1533 "session reinstatement from " 1534 "different address %s", 1535 cs->cs_initiator_addr); 1536 } else { 1537 CFISCSI_SESSION_DEBUG(cs2, 1538 "session reinstatement"); 1539 } 1540 cfiscsi_session_terminate(cs2); 1541 mtx_unlock(&softc->lock); 1542 pause("cfiscsi_reinstate", 1); 1543 goto restart; 1544 } 1545 } 1546 mtx_unlock(&softc->lock); 1547 } 1548 1549 /* 1550 * Register initiator with CTL. 1551 */ 1552 cfiscsi_session_register_initiator(cs); 1553 1554#ifdef ICL_KERNEL_PROXY 1555 if (cihp->socket > 0) { 1556#endif 1557 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1558 if (error != 0) { 1559 cfiscsi_session_terminate(cs); 1560 refcount_release(&cs->cs_outstanding_ctl_pdus); 1561 ci->status = CTL_ISCSI_ERROR; 1562 snprintf(ci->error_str, sizeof(ci->error_str), 1563 "%s: icl_conn_handoff failed with error %d", 1564 __func__, error); 1565 return; 1566 } 1567#ifdef ICL_KERNEL_PROXY 1568 } 1569#endif 1570 1571#ifdef ICL_KERNEL_PROXY 1572 cs->cs_login_phase = false; 1573 1574 /* 1575 * First PDU of the Full Feature phase has likely already arrived. 1576 * We have to pick it up and execute properly. 1577 */ 1578 if (cs->cs_login_pdu != NULL) { 1579 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1580 cfiscsi_pdu_handle(cs->cs_login_pdu); 1581 cs->cs_login_pdu = NULL; 1582 } 1583#endif 1584 1585 refcount_release(&cs->cs_outstanding_ctl_pdus); 1586 ci->status = CTL_ISCSI_OK; 1587} 1588 1589static void 1590cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1591{ 1592 struct ctl_iscsi_list_params *cilp; 1593 struct cfiscsi_session *cs; 1594 struct cfiscsi_softc *softc; 1595 struct sbuf *sb; 1596 int error; 1597 1598 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1599 softc = &cfiscsi_softc; 1600 1601 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1602 if (sb == NULL) { 1603 ci->status = CTL_ISCSI_ERROR; 1604 snprintf(ci->error_str, sizeof(ci->error_str), 1605 "Unable to allocate %d bytes for iSCSI session list", 1606 cilp->alloc_len); 1607 return; 1608 } 1609 1610 sbuf_printf(sb, "<ctlislist>\n"); 1611 mtx_lock(&softc->lock); 1612 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1613#ifdef ICL_KERNEL_PROXY 1614 if (cs->cs_target == NULL) 1615 continue; 1616#endif 1617 error = sbuf_printf(sb, "<connection id=\"%d\">" 1618 "<initiator>%s</initiator>" 1619 "<initiator_addr>%s</initiator_addr>" 1620 "<initiator_alias>%s</initiator_alias>" 1621 "<target>%s</target>" 1622 "<target_alias>%s</target_alias>" 1623 "<target_portal_group_tag>%u</target_portal_group_tag>" 1624 "<header_digest>%s</header_digest>" 1625 "<data_digest>%s</data_digest>" 1626 "<max_data_segment_length>%zd</max_data_segment_length>" 1627 "<immediate_data>%d</immediate_data>" 1628 "<iser>%d</iser>" 1629 "</connection>\n", 1630 cs->cs_id, 1631 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1632 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1633 cs->cs_target->ct_tag, 1634 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1635 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1636 cs->cs_max_data_segment_length, 1637 cs->cs_immediate_data, 1638 cs->cs_conn->ic_iser); 1639 if (error != 0) 1640 break; 1641 } 1642 mtx_unlock(&softc->lock); 1643 error = sbuf_printf(sb, "</ctlislist>\n"); 1644 if (error != 0) { 1645 sbuf_delete(sb); 1646 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1647 snprintf(ci->error_str, sizeof(ci->error_str), 1648 "Out of space, %d bytes is too small", cilp->alloc_len); 1649 return; 1650 } 1651 sbuf_finish(sb); 1652 1653 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1654 if (error != 0) { 1655 sbuf_delete(sb); 1656 snprintf(ci->error_str, sizeof(ci->error_str), 1657 "copyout failed with error %d", error); 1658 ci->status = CTL_ISCSI_ERROR; 1659 return; 1660 } 1661 cilp->fill_len = sbuf_len(sb) + 1; 1662 ci->status = CTL_ISCSI_OK; 1663 sbuf_delete(sb); 1664} 1665 1666static void 1667cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1668{ 1669 struct icl_pdu *response; 1670 struct iscsi_bhs_asynchronous_message *bhsam; 1671 struct ctl_iscsi_logout_params *cilp; 1672 struct cfiscsi_session *cs; 1673 struct cfiscsi_softc *softc; 1674 int found = 0; 1675 1676 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1677 softc = &cfiscsi_softc; 1678 1679 mtx_lock(&softc->lock); 1680 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1681 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1682 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1683 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1684 continue; 1685 1686 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1687 if (response == NULL) { 1688 ci->status = CTL_ISCSI_ERROR; 1689 snprintf(ci->error_str, sizeof(ci->error_str), 1690 "Unable to allocate memory"); 1691 mtx_unlock(&softc->lock); 1692 return; 1693 } 1694 bhsam = 1695 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1696 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1697 bhsam->bhsam_flags = 0x80; 1698 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1699 bhsam->bhsam_parameter3 = htons(10); 1700 cfiscsi_pdu_queue(response); 1701 found++; 1702 } 1703 mtx_unlock(&softc->lock); 1704 1705 if (found == 0) { 1706 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1707 snprintf(ci->error_str, sizeof(ci->error_str), 1708 "No matching connections found"); 1709 return; 1710 } 1711 1712 ci->status = CTL_ISCSI_OK; 1713} 1714 1715static void 1716cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1717{ 1718 struct icl_pdu *response; 1719 struct iscsi_bhs_asynchronous_message *bhsam; 1720 struct ctl_iscsi_terminate_params *citp; 1721 struct cfiscsi_session *cs; 1722 struct cfiscsi_softc *softc; 1723 int found = 0; 1724 1725 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1726 softc = &cfiscsi_softc; 1727 1728 mtx_lock(&softc->lock); 1729 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1730 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1731 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1732 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1733 continue; 1734 1735 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1736 if (response == NULL) { 1737 /* 1738 * Oh well. Just terminate the connection. 1739 */ 1740 } else { 1741 bhsam = (struct iscsi_bhs_asynchronous_message *) 1742 response->ip_bhs; 1743 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1744 bhsam->bhsam_flags = 0x80; 1745 bhsam->bhsam_0xffffffff = 0xffffffff; 1746 bhsam->bhsam_async_event = 1747 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1748 cfiscsi_pdu_queue(response); 1749 } 1750 cfiscsi_session_terminate(cs); 1751 found++; 1752 } 1753 mtx_unlock(&softc->lock); 1754 1755 if (found == 0) { 1756 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1757 snprintf(ci->error_str, sizeof(ci->error_str), 1758 "No matching connections found"); 1759 return; 1760 } 1761 1762 ci->status = CTL_ISCSI_OK; 1763} 1764 1765#ifdef ICL_KERNEL_PROXY 1766static void 1767cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1768{ 1769 struct ctl_iscsi_listen_params *cilp; 1770 struct sockaddr *sa; 1771 int error; 1772 1773 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1774 1775 if (cfiscsi_softc.listener == NULL) { 1776 CFISCSI_DEBUG("no listener"); 1777 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1778 ci->status = CTL_ISCSI_ERROR; 1779 return; 1780 } 1781 1782 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1783 if (error != 0) { 1784 CFISCSI_DEBUG("getsockaddr, error %d", error); 1785 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1786 ci->status = CTL_ISCSI_ERROR; 1787 return; 1788 } 1789 1790 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1791 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1792 if (error != 0) { 1793 free(sa, M_SONAME); 1794 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1795 snprintf(ci->error_str, sizeof(ci->error_str), 1796 "icl_listen_add failed, error %d", error); 1797 ci->status = CTL_ISCSI_ERROR; 1798 return; 1799 } 1800 1801 ci->status = CTL_ISCSI_OK; 1802} 1803 1804static void 1805cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1806{ 1807 struct ctl_iscsi_accept_params *ciap; 1808 struct cfiscsi_session *cs; 1809 int error; 1810 1811 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1812 1813 mtx_lock(&cfiscsi_softc.lock); 1814 for (;;) { 1815 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1816 if (cs->cs_waiting_for_ctld) 1817 break; 1818 } 1819 if (cs != NULL) 1820 break; 1821 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1822 if (error != 0) { 1823 mtx_unlock(&cfiscsi_softc.lock); 1824 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1825 ci->status = CTL_ISCSI_ERROR; 1826 return; 1827 } 1828 } 1829 mtx_unlock(&cfiscsi_softc.lock); 1830 1831 cs->cs_waiting_for_ctld = false; 1832 cs->cs_login_phase = true; 1833 1834 ciap->connection_id = cs->cs_id; 1835 ciap->portal_id = cs->cs_portal_id; 1836 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1837 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1838 cs->cs_initiator_sa->sa_len); 1839 if (error != 0) { 1840 snprintf(ci->error_str, sizeof(ci->error_str), 1841 "copyout failed with error %d", error); 1842 ci->status = CTL_ISCSI_ERROR; 1843 return; 1844 } 1845 1846 ci->status = CTL_ISCSI_OK; 1847} 1848 1849static void 1850cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1851{ 1852 struct ctl_iscsi_send_params *cisp; 1853 struct cfiscsi_session *cs; 1854 struct icl_pdu *ip; 1855 size_t datalen; 1856 void *data; 1857 int error; 1858 1859 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1860 1861 mtx_lock(&cfiscsi_softc.lock); 1862 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1863 if (cs->cs_id == cisp->connection_id) 1864 break; 1865 } 1866 if (cs == NULL) { 1867 mtx_unlock(&cfiscsi_softc.lock); 1868 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1869 ci->status = CTL_ISCSI_ERROR; 1870 return; 1871 } 1872 mtx_unlock(&cfiscsi_softc.lock); 1873 1874#if 0 1875 if (cs->cs_login_phase == false) 1876 return (EBUSY); 1877#endif 1878 1879 if (cs->cs_terminating) { 1880 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1881 ci->status = CTL_ISCSI_ERROR; 1882 return; 1883 } 1884 1885 datalen = cisp->data_segment_len; 1886 /* 1887 * XXX 1888 */ 1889 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1890 if (datalen > 65535) { 1891 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1892 ci->status = CTL_ISCSI_ERROR; 1893 return; 1894 } 1895 if (datalen > 0) { 1896 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1897 error = copyin(cisp->data_segment, data, datalen); 1898 if (error != 0) { 1899 free(data, M_CFISCSI); 1900 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1901 ci->status = CTL_ISCSI_ERROR; 1902 return; 1903 } 1904 } 1905 1906 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1907 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1908 if (datalen > 0) { 1909 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1910 free(data, M_CFISCSI); 1911 } 1912 CFISCSI_SESSION_LOCK(cs); 1913 icl_pdu_queue(ip); 1914 CFISCSI_SESSION_UNLOCK(cs); 1915 ci->status = CTL_ISCSI_OK; 1916} 1917 1918static void 1919cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1920{ 1921 struct ctl_iscsi_receive_params *cirp; 1922 struct cfiscsi_session *cs; 1923 struct icl_pdu *ip; 1924 void *data; 1925 int error; 1926 1927 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1928 1929 mtx_lock(&cfiscsi_softc.lock); 1930 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1931 if (cs->cs_id == cirp->connection_id) 1932 break; 1933 } 1934 if (cs == NULL) { 1935 mtx_unlock(&cfiscsi_softc.lock); 1936 snprintf(ci->error_str, sizeof(ci->error_str), 1937 "connection not found"); 1938 ci->status = CTL_ISCSI_ERROR; 1939 return; 1940 } 1941 mtx_unlock(&cfiscsi_softc.lock); 1942 1943#if 0 1944 if (is->is_login_phase == false) 1945 return (EBUSY); 1946#endif 1947 1948 CFISCSI_SESSION_LOCK(cs); 1949 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1950 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1951 if (error != 0) { 1952 CFISCSI_SESSION_UNLOCK(cs); 1953 snprintf(ci->error_str, sizeof(ci->error_str), 1954 "interrupted by signal"); 1955 ci->status = CTL_ISCSI_ERROR; 1956 return; 1957 } 1958 } 1959 1960 if (cs->cs_terminating) { 1961 CFISCSI_SESSION_UNLOCK(cs); 1962 snprintf(ci->error_str, sizeof(ci->error_str), 1963 "connection terminating"); 1964 ci->status = CTL_ISCSI_ERROR; 1965 return; 1966 } 1967 ip = cs->cs_login_pdu; 1968 cs->cs_login_pdu = NULL; 1969 CFISCSI_SESSION_UNLOCK(cs); 1970 1971 if (ip->ip_data_len > cirp->data_segment_len) { 1972 icl_pdu_free(ip); 1973 snprintf(ci->error_str, sizeof(ci->error_str), 1974 "data segment too big"); 1975 ci->status = CTL_ISCSI_ERROR; 1976 return; 1977 } 1978 1979 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1980 if (ip->ip_data_len > 0) { 1981 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1982 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1983 copyout(data, cirp->data_segment, ip->ip_data_len); 1984 free(data, M_CFISCSI); 1985 } 1986 1987 icl_pdu_free(ip); 1988 ci->status = CTL_ISCSI_OK; 1989} 1990 1991#endif /* !ICL_KERNEL_PROXY */ 1992 1993static void 1994cfiscsi_ioctl_port_create(struct ctl_req *req) 1995{ 1996 struct cfiscsi_target *ct; 1997 struct ctl_port *port; 1998 const char *target, *alias, *tags; 1999 struct scsi_vpd_id_descriptor *desc; 2000 ctl_options_t opts; 2001 int retval, len, idlen; 2002 uint16_t tag; 2003 2004 ctl_init_opts(&opts, req->num_args, req->kern_args); 2005 target = ctl_get_opt(&opts, "cfiscsi_target"); 2006 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2007 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2008 if (target == NULL || tags == NULL) { 2009 req->status = CTL_LUN_ERROR; 2010 snprintf(req->error_str, sizeof(req->error_str), 2011 "Missing required argument"); 2012 ctl_free_opts(&opts); 2013 return; 2014 } 2015 tag = strtol(tags, (char **)NULL, 10); 2016 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2017 if (ct == NULL) { 2018 req->status = CTL_LUN_ERROR; 2019 snprintf(req->error_str, sizeof(req->error_str), 2020 "failed to create target \"%s\"", target); 2021 ctl_free_opts(&opts); 2022 return; 2023 } 2024 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2025 req->status = CTL_LUN_ERROR; 2026 snprintf(req->error_str, sizeof(req->error_str), 2027 "target \"%s\" for portal group tag %u already exists", 2028 target, tag); 2029 cfiscsi_target_release(ct); 2030 ctl_free_opts(&opts); 2031 return; 2032 } 2033 port = &ct->ct_port; 2034 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2035 goto done; 2036 2037 port->frontend = &cfiscsi_frontend; 2038 port->port_type = CTL_PORT_ISCSI; 2039 /* XXX KDM what should the real number be here? */ 2040 port->num_requested_ctl_io = 4096; 2041 port->port_name = "iscsi"; 2042 port->physical_port = tag; 2043 port->virtual_port = ct->ct_target_id; 2044 port->port_online = cfiscsi_online; 2045 port->port_offline = cfiscsi_offline; 2046 port->port_info = cfiscsi_info; 2047 port->onoff_arg = ct; 2048 port->fe_datamove = cfiscsi_datamove; 2049 port->fe_done = cfiscsi_done; 2050 2051 /* XXX KDM what should we report here? */ 2052 /* XXX These should probably be fetched from CTL. */ 2053 port->max_targets = 1; 2054 port->max_target_id = 15; 2055 port->targ_port = -1; 2056 2057 port->options = opts; 2058 STAILQ_INIT(&opts); 2059 2060 /* Generate Port ID. */ 2061 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2062 idlen = roundup2(idlen, 4); 2063 len = sizeof(struct scsi_vpd_device_id) + idlen; 2064 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2065 M_CTL, M_WAITOK | M_ZERO); 2066 port->port_devid->len = len; 2067 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2068 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2069 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2070 SVPD_ID_TYPE_SCSI_NAME; 2071 desc->length = idlen; 2072 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2073 2074 /* Generate Target ID. */ 2075 idlen = strlen(target) + 1; 2076 idlen = roundup2(idlen, 4); 2077 len = sizeof(struct scsi_vpd_device_id) + idlen; 2078 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2079 M_CTL, M_WAITOK | M_ZERO); 2080 port->target_devid->len = len; 2081 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2082 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2083 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2084 SVPD_ID_TYPE_SCSI_NAME; 2085 desc->length = idlen; 2086 strlcpy(desc->identifier, target, idlen); 2087 2088 retval = ctl_port_register(port); 2089 if (retval != 0) { 2090 ctl_free_opts(&port->options); 2091 free(port->port_devid, M_CFISCSI); 2092 free(port->target_devid, M_CFISCSI); 2093 cfiscsi_target_release(ct); 2094 req->status = CTL_LUN_ERROR; 2095 snprintf(req->error_str, sizeof(req->error_str), 2096 "ctl_port_register() failed with error %d", retval); 2097 return; 2098 } 2099done: 2100 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2101 req->status = CTL_LUN_OK; 2102 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2103 sizeof(port->targ_port)); //XXX 2104} 2105 2106static void 2107cfiscsi_ioctl_port_remove(struct ctl_req *req) 2108{ 2109 struct cfiscsi_target *ct; 2110 const char *target, *tags; 2111 ctl_options_t opts; 2112 uint16_t tag; 2113 2114 ctl_init_opts(&opts, req->num_args, req->kern_args); 2115 target = ctl_get_opt(&opts, "cfiscsi_target"); 2116 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2117 if (target == NULL || tags == NULL) { 2118 ctl_free_opts(&opts); 2119 req->status = CTL_LUN_ERROR; 2120 snprintf(req->error_str, sizeof(req->error_str), 2121 "Missing required argument"); 2122 return; 2123 } 2124 tag = strtol(tags, (char **)NULL, 10); 2125 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2126 if (ct == NULL) { 2127 ctl_free_opts(&opts); 2128 req->status = CTL_LUN_ERROR; 2129 snprintf(req->error_str, sizeof(req->error_str), 2130 "can't find target \"%s\"", target); 2131 return; 2132 } 2133 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2134 ctl_free_opts(&opts); 2135 req->status = CTL_LUN_ERROR; 2136 snprintf(req->error_str, sizeof(req->error_str), 2137 "target \"%s\" is already dying", target); 2138 return; 2139 } 2140 ctl_free_opts(&opts); 2141 2142 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2143 ctl_port_offline(&ct->ct_port); 2144 cfiscsi_target_release(ct); 2145 cfiscsi_target_release(ct); 2146 req->status = CTL_LUN_OK; 2147} 2148 2149static int 2150cfiscsi_ioctl(struct cdev *dev, 2151 u_long cmd, caddr_t addr, int flag, struct thread *td) 2152{ 2153 struct ctl_iscsi *ci; 2154 struct ctl_req *req; 2155 2156 if (cmd == CTL_PORT_REQ) { 2157 req = (struct ctl_req *)addr; 2158 switch (req->reqtype) { 2159 case CTL_REQ_CREATE: 2160 cfiscsi_ioctl_port_create(req); 2161 break; 2162 case CTL_REQ_REMOVE: 2163 cfiscsi_ioctl_port_remove(req); 2164 break; 2165 default: 2166 req->status = CTL_LUN_ERROR; 2167 snprintf(req->error_str, sizeof(req->error_str), 2168 "Unsupported request type %d", req->reqtype); 2169 } 2170 return (0); 2171 } 2172 2173 if (cmd != CTL_ISCSI) 2174 return (ENOTTY); 2175 2176 ci = (struct ctl_iscsi *)addr; 2177 switch (ci->type) { 2178 case CTL_ISCSI_HANDOFF: 2179 cfiscsi_ioctl_handoff(ci); 2180 break; 2181 case CTL_ISCSI_LIST: 2182 cfiscsi_ioctl_list(ci); 2183 break; 2184 case CTL_ISCSI_LOGOUT: 2185 cfiscsi_ioctl_logout(ci); 2186 break; 2187 case CTL_ISCSI_TERMINATE: 2188 cfiscsi_ioctl_terminate(ci); 2189 break; 2190#ifdef ICL_KERNEL_PROXY 2191 case CTL_ISCSI_LISTEN: 2192 cfiscsi_ioctl_listen(ci); 2193 break; 2194 case CTL_ISCSI_ACCEPT: 2195 cfiscsi_ioctl_accept(ci); 2196 break; 2197 case CTL_ISCSI_SEND: 2198 cfiscsi_ioctl_send(ci); 2199 break; 2200 case CTL_ISCSI_RECEIVE: 2201 cfiscsi_ioctl_receive(ci); 2202 break; 2203#else 2204 case CTL_ISCSI_LISTEN: 2205 case CTL_ISCSI_ACCEPT: 2206 case CTL_ISCSI_SEND: 2207 case CTL_ISCSI_RECEIVE: 2208 ci->status = CTL_ISCSI_ERROR; 2209 snprintf(ci->error_str, sizeof(ci->error_str), 2210 "%s: CTL compiled without ICL_KERNEL_PROXY", 2211 __func__); 2212 break; 2213#endif /* !ICL_KERNEL_PROXY */ 2214 default: 2215 ci->status = CTL_ISCSI_ERROR; 2216 snprintf(ci->error_str, sizeof(ci->error_str), 2217 "%s: invalid iSCSI request type %d", __func__, ci->type); 2218 break; 2219 } 2220 2221 return (0); 2222} 2223 2224static void 2225cfiscsi_target_hold(struct cfiscsi_target *ct) 2226{ 2227 2228 refcount_acquire(&ct->ct_refcount); 2229} 2230 2231static void 2232cfiscsi_target_release(struct cfiscsi_target *ct) 2233{ 2234 struct cfiscsi_softc *softc; 2235 2236 softc = ct->ct_softc; 2237 mtx_lock(&softc->lock); 2238 if (refcount_release(&ct->ct_refcount)) { 2239 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2240 mtx_unlock(&softc->lock); 2241 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2242 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2243 if (ctl_port_deregister(&ct->ct_port) != 0) 2244 printf("%s: ctl_port_deregister() failed\n", 2245 __func__); 2246 } 2247 free(ct, M_CFISCSI); 2248 2249 return; 2250 } 2251 mtx_unlock(&softc->lock); 2252} 2253 2254static struct cfiscsi_target * 2255cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2256{ 2257 struct cfiscsi_target *ct; 2258 2259 mtx_lock(&softc->lock); 2260 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2261 if (ct->ct_tag != tag || 2262 strcmp(name, ct->ct_name) != 0 || 2263 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2264 continue; 2265 cfiscsi_target_hold(ct); 2266 mtx_unlock(&softc->lock); 2267 return (ct); 2268 } 2269 mtx_unlock(&softc->lock); 2270 2271 return (NULL); 2272} 2273 2274static struct cfiscsi_target * 2275cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2276 const char *alias, uint16_t tag) 2277{ 2278 struct cfiscsi_target *ct, *newct; 2279 2280 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2281 return (NULL); 2282 2283 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2284 2285 mtx_lock(&softc->lock); 2286 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2287 if (ct->ct_tag != tag || 2288 strcmp(name, ct->ct_name) != 0 || 2289 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2290 continue; 2291 cfiscsi_target_hold(ct); 2292 mtx_unlock(&softc->lock); 2293 free(newct, M_CFISCSI); 2294 return (ct); 2295 } 2296 2297 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2298 if (alias != NULL) 2299 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2300 newct->ct_tag = tag; 2301 refcount_init(&newct->ct_refcount, 1); 2302 newct->ct_softc = softc; 2303 if (TAILQ_EMPTY(&softc->targets)) 2304 softc->last_target_id = 0; 2305 newct->ct_target_id = ++softc->last_target_id; 2306 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2307 mtx_unlock(&softc->lock); 2308 2309 return (newct); 2310} 2311 2312static void 2313cfiscsi_datamove_in(union ctl_io *io) 2314{ 2315 struct cfiscsi_session *cs; 2316 struct icl_pdu *request, *response; 2317 const struct iscsi_bhs_scsi_command *bhssc; 2318 struct iscsi_bhs_data_in *bhsdi; 2319 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2320 size_t len, expected_len, sg_len, buffer_offset; 2321 const char *sg_addr; 2322 int ctl_sg_count, error, i; 2323 2324 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2325 cs = PDU_SESSION(request); 2326 2327 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2328 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2329 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2330 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2331 2332 if (io->scsiio.kern_sg_entries > 0) { 2333 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2334 ctl_sg_count = io->scsiio.kern_sg_entries; 2335 } else { 2336 ctl_sglist = &ctl_sg_entry; 2337 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2338 ctl_sglist->len = io->scsiio.kern_data_len; 2339 ctl_sg_count = 1; 2340 } 2341 2342 /* 2343 * This is the total amount of data to be transferred within the current 2344 * SCSI command. We need to record it so that we can properly report 2345 * underflow/underflow. 2346 */ 2347 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2348 2349 /* 2350 * This is the offset within the current SCSI command; for the first 2351 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2352 * it will be the sum of lengths of previous ones. 2353 */ 2354 buffer_offset = io->scsiio.kern_rel_offset; 2355 2356 /* 2357 * This is the transfer length expected by the initiator. In theory, 2358 * it could be different from the correct amount of data from the SCSI 2359 * point of view, even if that doesn't make any sense. 2360 */ 2361 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2362#if 0 2363 if (expected_len != io->scsiio.kern_total_len) { 2364 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2365 "actual length %zd", expected_len, 2366 (size_t)io->scsiio.kern_total_len); 2367 } 2368#endif 2369 2370 if (buffer_offset >= expected_len) { 2371#if 0 2372 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2373 "already sent the expected len", buffer_offset); 2374#endif 2375 io->scsiio.be_move_done(io); 2376 return; 2377 } 2378 2379 i = 0; 2380 sg_addr = NULL; 2381 sg_len = 0; 2382 response = NULL; 2383 bhsdi = NULL; 2384 for (;;) { 2385 if (response == NULL) { 2386 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2387 if (response == NULL) { 2388 CFISCSI_SESSION_WARN(cs, "failed to " 2389 "allocate memory; dropping connection"); 2390 ctl_set_busy(&io->scsiio); 2391 io->scsiio.be_move_done(io); 2392 cfiscsi_session_terminate(cs); 2393 return; 2394 } 2395 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2396 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2397 bhsdi->bhsdi_initiator_task_tag = 2398 bhssc->bhssc_initiator_task_tag; 2399 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2400 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2401 PDU_EXPDATASN(request)++; 2402 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2403 } 2404 2405 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2406 if (sg_len == 0) { 2407 sg_addr = ctl_sglist[i].addr; 2408 sg_len = ctl_sglist[i].len; 2409 KASSERT(sg_len > 0, ("sg_len <= 0")); 2410 } 2411 2412 len = sg_len; 2413 2414 /* 2415 * Truncate to maximum data segment length. 2416 */ 2417 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2418 ("ip_data_len %zd >= max_data_segment_length %zd", 2419 response->ip_data_len, cs->cs_max_data_segment_length)); 2420 if (response->ip_data_len + len > 2421 cs->cs_max_data_segment_length) { 2422 len = cs->cs_max_data_segment_length - 2423 response->ip_data_len; 2424 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2425 len, sg_len)); 2426 } 2427 2428 /* 2429 * Truncate to expected data transfer length. 2430 */ 2431 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2432 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2433 buffer_offset, response->ip_data_len, expected_len)); 2434 if (buffer_offset + response->ip_data_len + len > expected_len) { 2435 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2436 "to expected data transfer length %zd", 2437 buffer_offset + response->ip_data_len + len, expected_len); 2438 len = expected_len - (buffer_offset + response->ip_data_len); 2439 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2440 len, sg_len)); 2441 } 2442 2443 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2444 if (error != 0) { 2445 CFISCSI_SESSION_WARN(cs, "failed to " 2446 "allocate memory; dropping connection"); 2447 icl_pdu_free(response); 2448 ctl_set_busy(&io->scsiio); 2449 io->scsiio.be_move_done(io); 2450 cfiscsi_session_terminate(cs); 2451 return; 2452 } 2453 sg_addr += len; 2454 sg_len -= len; 2455 io->scsiio.kern_data_resid -= len; 2456 2457 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2458 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2459 buffer_offset, response->ip_data_len, expected_len)); 2460 if (buffer_offset + response->ip_data_len == expected_len) { 2461 /* 2462 * Already have the amount of data the initiator wanted. 2463 */ 2464 break; 2465 } 2466 2467 if (sg_len == 0) { 2468 /* 2469 * End of scatter-gather segment; 2470 * proceed to the next one... 2471 */ 2472 if (i == ctl_sg_count - 1) { 2473 /* 2474 * ... unless this was the last one. 2475 */ 2476 break; 2477 } 2478 i++; 2479 } 2480 2481 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2482 /* 2483 * Can't stuff more data into the current PDU; 2484 * queue it. Note that's not enough to check 2485 * for kern_data_resid == 0 instead; there 2486 * may be several Data-In PDUs for the final 2487 * call to cfiscsi_datamove(), and we want 2488 * to set the F flag only on the last of them. 2489 */ 2490 buffer_offset += response->ip_data_len; 2491 if (buffer_offset == io->scsiio.kern_total_len || 2492 buffer_offset == expected_len) { 2493 buffer_offset -= response->ip_data_len; 2494 break; 2495 } 2496 cfiscsi_pdu_queue(response); 2497 response = NULL; 2498 bhsdi = NULL; 2499 } 2500 } 2501 if (response != NULL) { 2502 buffer_offset += response->ip_data_len; 2503 if (buffer_offset == io->scsiio.kern_total_len || 2504 buffer_offset == expected_len) { 2505 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2506 if (io->io_hdr.status == CTL_SUCCESS) { 2507 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2508 if (PDU_TOTAL_TRANSFER_LEN(request) < 2509 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2510 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2511 bhsdi->bhsdi_residual_count = 2512 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2513 PDU_TOTAL_TRANSFER_LEN(request)); 2514 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2515 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2516 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2517 bhsdi->bhsdi_residual_count = 2518 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2519 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2520 } 2521 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2522 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2523 } 2524 } 2525 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2526 cfiscsi_pdu_queue(response); 2527 } 2528 2529 io->scsiio.be_move_done(io); 2530} 2531 2532static void 2533cfiscsi_datamove_out(union ctl_io *io) 2534{ 2535 struct cfiscsi_session *cs; 2536 struct icl_pdu *request, *response; 2537 const struct iscsi_bhs_scsi_command *bhssc; 2538 struct iscsi_bhs_r2t *bhsr2t; 2539 struct cfiscsi_data_wait *cdw; 2540 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2541 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2542 uint32_t target_transfer_tag; 2543 bool done; 2544 2545 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2546 cs = PDU_SESSION(request); 2547 2548 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2549 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2550 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2551 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2552 2553 /* 2554 * We need to record it so that we can properly report 2555 * underflow/underflow. 2556 */ 2557 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2558 2559 /* 2560 * Complete write underflow. Not a single byte to read. Return. 2561 */ 2562 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2563 if (io->scsiio.kern_rel_offset >= expected_len) { 2564 io->scsiio.be_move_done(io); 2565 return; 2566 } 2567 datamove_len = MIN(io->scsiio.kern_data_len, 2568 expected_len - io->scsiio.kern_rel_offset); 2569 2570 target_transfer_tag = 2571 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2572 2573#if 0 2574 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2575 "task tag 0x%x, target transfer tag 0x%x", 2576 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2577#endif 2578 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2579 if (cdw == NULL) { 2580 CFISCSI_SESSION_WARN(cs, "failed to " 2581 "allocate memory; dropping connection"); 2582 ctl_set_busy(&io->scsiio); 2583 io->scsiio.be_move_done(io); 2584 cfiscsi_session_terminate(cs); 2585 return; 2586 } 2587 cdw->cdw_ctl_io = io; 2588 cdw->cdw_target_transfer_tag = target_transfer_tag; 2589 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2590 cdw->cdw_r2t_end = datamove_len; 2591 cdw->cdw_datasn = 0; 2592 2593 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2594 if (io->scsiio.kern_sg_entries > 0) { 2595 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2596 } else { 2597 ctl_sglist = &ctl_sg_entry; 2598 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2599 ctl_sglist->len = datamove_len; 2600 } 2601 cdw->cdw_sg_index = 0; 2602 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2603 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2604 r2t_off = io->scsiio.ext_data_filled; 2605 while (r2t_off > 0) { 2606 if (r2t_off >= cdw->cdw_sg_len) { 2607 r2t_off -= cdw->cdw_sg_len; 2608 cdw->cdw_sg_index++; 2609 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2610 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2611 continue; 2612 } 2613 cdw->cdw_sg_addr += r2t_off; 2614 cdw->cdw_sg_len -= r2t_off; 2615 r2t_off = 0; 2616 } 2617 2618 if (cs->cs_immediate_data && 2619 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2620 icl_pdu_data_segment_length(request)) { 2621 done = cfiscsi_handle_data_segment(request, cdw); 2622 if (done) { 2623 uma_zfree(cfiscsi_data_wait_zone, cdw); 2624 io->scsiio.be_move_done(io); 2625 return; 2626 } 2627 } 2628 2629 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2630 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2631 cs->cs_max_burst_length); 2632 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2633 2634 CFISCSI_SESSION_LOCK(cs); 2635 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2636 CFISCSI_SESSION_UNLOCK(cs); 2637 2638 /* 2639 * XXX: We should limit the number of outstanding R2T PDUs 2640 * per task to MaxOutstandingR2T. 2641 */ 2642 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2643 if (response == NULL) { 2644 CFISCSI_SESSION_WARN(cs, "failed to " 2645 "allocate memory; dropping connection"); 2646 ctl_set_busy(&io->scsiio); 2647 io->scsiio.be_move_done(io); 2648 cfiscsi_session_terminate(cs); 2649 return; 2650 } 2651 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2652 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2653 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2654 bhsr2t->bhsr2t_flags = 0x80; 2655 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2656 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2657 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2658 /* 2659 * XXX: Here we assume that cfiscsi_datamove() won't ever 2660 * be running concurrently on several CPUs for a given 2661 * command. 2662 */ 2663 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2664 PDU_R2TSN(request)++; 2665 /* 2666 * This is the offset within the current SCSI command; 2667 * i.e. for the first call of datamove(), it will be 0, 2668 * and for subsequent ones it will be the sum of lengths 2669 * of previous ones. 2670 * 2671 * The ext_data_filled is to account for unsolicited 2672 * (immediate) data that might have already arrived. 2673 */ 2674 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2675 /* 2676 * This is the total length (sum of S/G lengths) this call 2677 * to cfiscsi_datamove() is supposed to handle, limited by 2678 * MaxBurstLength. 2679 */ 2680 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2681 cfiscsi_pdu_queue(response); 2682} 2683 2684static void 2685cfiscsi_datamove(union ctl_io *io) 2686{ 2687 2688 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2689 cfiscsi_datamove_in(io); 2690 else { 2691 /* We hadn't received anything during this datamove yet. */ 2692 io->scsiio.ext_data_filled = 0; 2693 cfiscsi_datamove_out(io); 2694 } 2695} 2696 2697static void 2698cfiscsi_scsi_command_done(union ctl_io *io) 2699{ 2700 struct icl_pdu *request, *response; 2701 struct iscsi_bhs_scsi_command *bhssc; 2702 struct iscsi_bhs_scsi_response *bhssr; 2703#ifdef DIAGNOSTIC 2704 struct cfiscsi_data_wait *cdw; 2705#endif 2706 struct cfiscsi_session *cs; 2707 uint16_t sense_length; 2708 2709 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2710 cs = PDU_SESSION(request); 2711 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2712 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2713 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2714 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2715 2716 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2717 // bhssc->bhssc_initiator_task_tag); 2718 2719#ifdef DIAGNOSTIC 2720 CFISCSI_SESSION_LOCK(cs); 2721 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2722 KASSERT(bhssc->bhssc_initiator_task_tag != 2723 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2724 CFISCSI_SESSION_UNLOCK(cs); 2725#endif 2726 2727 /* 2728 * Do not return status for aborted commands. 2729 * There are exceptions, but none supported by CTL yet. 2730 */ 2731 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2732 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2733 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2734 ctl_free_io(io); 2735 icl_pdu_free(request); 2736 return; 2737 } 2738 2739 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2740 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2741 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2742 bhssr->bhssr_flags = 0x80; 2743 /* 2744 * XXX: We don't deal with bidirectional under/overflows; 2745 * does anything actually support those? 2746 */ 2747 if (PDU_TOTAL_TRANSFER_LEN(request) < 2748 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2749 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2750 bhssr->bhssr_residual_count = 2751 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2752 PDU_TOTAL_TRANSFER_LEN(request)); 2753 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2754 // ntohl(bhssr->bhssr_residual_count)); 2755 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2756 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2757 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2758 bhssr->bhssr_residual_count = 2759 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2760 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2761 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2762 // ntohl(bhssr->bhssr_residual_count)); 2763 } 2764 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2765 bhssr->bhssr_status = io->scsiio.scsi_status; 2766 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2767 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2768 2769 if (io->scsiio.sense_len > 0) { 2770#if 0 2771 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2772 io->scsiio.sense_len); 2773#endif 2774 sense_length = htons(io->scsiio.sense_len); 2775 icl_pdu_append_data(response, 2776 &sense_length, sizeof(sense_length), M_WAITOK); 2777 icl_pdu_append_data(response, 2778 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2779 } 2780 2781 ctl_free_io(io); 2782 icl_pdu_free(request); 2783 cfiscsi_pdu_queue(response); 2784} 2785 2786static void 2787cfiscsi_task_management_done(union ctl_io *io) 2788{ 2789 struct icl_pdu *request, *response; 2790 struct iscsi_bhs_task_management_request *bhstmr; 2791 struct iscsi_bhs_task_management_response *bhstmr2; 2792 struct cfiscsi_data_wait *cdw, *tmpcdw; 2793 struct cfiscsi_session *cs, *tcs; 2794 struct cfiscsi_softc *softc; 2795 int cold_reset = 0; 2796 2797 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2798 cs = PDU_SESSION(request); 2799 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2800 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2801 ISCSI_BHS_OPCODE_TASK_REQUEST, 2802 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2803 2804#if 0 2805 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2806 bhstmr->bhstmr_initiator_task_tag, 2807 bhstmr->bhstmr_referenced_task_tag); 2808#endif 2809 2810 if ((bhstmr->bhstmr_function & ~0x80) == 2811 BHSTMR_FUNCTION_ABORT_TASK) { 2812 /* 2813 * Make sure we no longer wait for Data-Out for this command. 2814 */ 2815 CFISCSI_SESSION_LOCK(cs); 2816 TAILQ_FOREACH_SAFE(cdw, 2817 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2818 if (bhstmr->bhstmr_referenced_task_tag != 2819 cdw->cdw_initiator_task_tag) 2820 continue; 2821 2822#if 0 2823 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2824 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2825#endif 2826 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2827 cdw, cdw_next); 2828 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2829 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2830 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2831 uma_zfree(cfiscsi_data_wait_zone, cdw); 2832 } 2833 CFISCSI_SESSION_UNLOCK(cs); 2834 } 2835 if ((bhstmr->bhstmr_function & ~0x80) == 2836 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2837 io->io_hdr.status == CTL_SUCCESS) 2838 cold_reset = 1; 2839 2840 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2841 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2842 response->ip_bhs; 2843 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2844 bhstmr2->bhstmr_flags = 0x80; 2845 switch (io->taskio.task_status) { 2846 case CTL_TASK_FUNCTION_COMPLETE: 2847 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2848 break; 2849 case CTL_TASK_FUNCTION_SUCCEEDED: 2850 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2851 break; 2852 case CTL_TASK_LUN_DOES_NOT_EXIST: 2853 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2854 break; 2855 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2856 default: 2857 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2858 break; 2859 } 2860 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2861 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2862 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2863 2864 ctl_free_io(io); 2865 icl_pdu_free(request); 2866 cfiscsi_pdu_queue(response); 2867 2868 if (cold_reset) { 2869 softc = cs->cs_target->ct_softc; 2870 mtx_lock(&softc->lock); 2871 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2872 if (tcs->cs_target == cs->cs_target) 2873 cfiscsi_session_terminate(tcs); 2874 } 2875 mtx_unlock(&softc->lock); 2876 } 2877} 2878 2879static void 2880cfiscsi_done(union ctl_io *io) 2881{ 2882 struct icl_pdu *request; 2883 struct cfiscsi_session *cs; 2884 2885 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2886 ("invalid CTL status %#x", io->io_hdr.status)); 2887 2888 if (io->io_hdr.io_type == CTL_IO_TASK && 2889 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2890 /* 2891 * Implicit task termination has just completed; nothing to do. 2892 */ 2893 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2894 cs->cs_tasks_aborted = true; 2895 refcount_release(&cs->cs_outstanding_ctl_pdus); 2896 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2897 ctl_free_io(io); 2898 return; 2899 } 2900 2901 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2902 cs = PDU_SESSION(request); 2903 refcount_release(&cs->cs_outstanding_ctl_pdus); 2904 2905 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2906 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2907 cfiscsi_scsi_command_done(io); 2908 break; 2909 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2910 cfiscsi_task_management_done(io); 2911 break; 2912 default: 2913 panic("cfiscsi_done called with wrong opcode 0x%x", 2914 request->ip_bhs->bhs_opcode); 2915 } 2916} 2917