ctl_frontend_iscsi.c revision 275058
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: head/sys/cam/ctl/ctl_frontend_iscsi.c 275058 2014-11-25 17:53:35Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 275058 2014-11-25 17:53:35Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capsicum.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.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; 88SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 89 &debug, 1, "Enable debug messages"); 90static int ping_timeout = 5; 91SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 92 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 93static int login_timeout = 60; 94SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 95 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 96static int maxcmdsn_delta = 256; 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 98 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 99 "without confirmation"); 100 101#define CFISCSI_DEBUG(X, ...) \ 102 do { \ 103 if (debug > 1) { \ 104 printf("%s: " X "\n", \ 105 __func__, ## __VA_ARGS__); \ 106 } \ 107 } while (0) 108 109#define CFISCSI_WARN(X, ...) \ 110 do { \ 111 if (debug > 0) { \ 112 printf("WARNING: %s: " X "\n", \ 113 __func__, ## __VA_ARGS__); \ 114 } \ 115 } while (0) 116 117#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 118 do { \ 119 if (debug > 1) { \ 120 printf("%s: %s (%s): " X "\n", \ 121 __func__, S->cs_initiator_addr, \ 122 S->cs_initiator_name, ## __VA_ARGS__); \ 123 } \ 124 } while (0) 125 126#define CFISCSI_SESSION_WARN(S, X, ...) \ 127 do { \ 128 if (debug > 0) { \ 129 printf("WARNING: %s (%s): " X "\n", \ 130 S->cs_initiator_addr, \ 131 S->cs_initiator_name, ## __VA_ARGS__); \ 132 } \ 133 } while (0) 134 135#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 136#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 137#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 138 139#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 140#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 141#define PDU_EXPDATASN(X) (X)->ip_prv0 142#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 143#define PDU_R2TSN(X) (X)->ip_prv2 144 145int cfiscsi_init(void); 146static void cfiscsi_online(void *arg); 147static void cfiscsi_offline(void *arg); 148static int cfiscsi_info(void *arg, struct sbuf *sb); 149static int cfiscsi_lun_enable(void *arg, 150 struct ctl_id target_id, int lun_id); 151static int cfiscsi_lun_disable(void *arg, 152 struct ctl_id target_id, int lun_id); 153static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 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); 169static struct cfiscsi_target *cfiscsi_target_find_or_create( 170 struct cfiscsi_softc *softc, const char *name, const char *alias); 171static void cfiscsi_target_release(struct cfiscsi_target *ct); 172static void cfiscsi_session_delete(struct cfiscsi_session *cs); 173 174static struct cfiscsi_softc cfiscsi_softc; 175extern struct ctl_softc *control_softc; 176 177static struct ctl_frontend cfiscsi_frontend = 178{ 179 .name = "iscsi", 180 .init = cfiscsi_init, 181 .ioctl = cfiscsi_ioctl, 182}; 183CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 184MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 185 186static struct icl_pdu * 187cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 188{ 189 190 return (icl_pdu_new(request->ip_conn, flags)); 191} 192 193static bool 194cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 195{ 196 const struct iscsi_bhs_scsi_command *bhssc; 197 struct cfiscsi_session *cs; 198 uint32_t cmdsn, expstatsn; 199 200 cs = PDU_SESSION(request); 201 202 /* 203 * Every incoming PDU - not just NOP-Out - resets the ping timer. 204 * The purpose of the timeout is to reset the connection when it stalls; 205 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 206 * in some queue. 207 * 208 * XXX: Locking? 209 */ 210 cs->cs_timeout = 0; 211 212 /* 213 * Data-Out PDUs don't contain CmdSN. 214 */ 215 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 216 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 217 return (false); 218 219 /* 220 * We're only using fields common for all the request 221 * (initiator -> target) PDUs. 222 */ 223 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 224 cmdsn = ntohl(bhssc->bhssc_cmdsn); 225 expstatsn = ntohl(bhssc->bhssc_expstatsn); 226 227 CFISCSI_SESSION_LOCK(cs); 228#if 0 229 if (expstatsn != cs->cs_statsn) { 230 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 231 "while current StatSN is %d", expstatsn, 232 cs->cs_statsn); 233 } 234#endif 235 236 /* 237 * The target MUST silently ignore any non-immediate command outside 238 * of this range. 239 */ 240 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 241 CFISCSI_SESSION_UNLOCK(cs); 242 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 243 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 244 return (true); 245 } 246 247 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 248 cs->cs_cmdsn++; 249 250 CFISCSI_SESSION_UNLOCK(cs); 251 252 return (false); 253} 254 255static void 256cfiscsi_pdu_handle(struct icl_pdu *request) 257{ 258 struct cfiscsi_session *cs; 259 bool ignore; 260 261 cs = PDU_SESSION(request); 262 263 ignore = cfiscsi_pdu_update_cmdsn(request); 264 if (ignore) { 265 icl_pdu_free(request); 266 return; 267 } 268 269 /* 270 * Handle the PDU; this includes e.g. receiving the remaining 271 * part of PDU and submitting the SCSI command to CTL 272 * or queueing a reply. The handling routine is responsible 273 * for freeing the PDU when it's no longer needed. 274 */ 275 switch (request->ip_bhs->bhs_opcode & 276 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 277 case ISCSI_BHS_OPCODE_NOP_OUT: 278 cfiscsi_pdu_handle_nop_out(request); 279 break; 280 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 281 cfiscsi_pdu_handle_scsi_command(request); 282 break; 283 case ISCSI_BHS_OPCODE_TASK_REQUEST: 284 cfiscsi_pdu_handle_task_request(request); 285 break; 286 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 287 cfiscsi_pdu_handle_data_out(request); 288 break; 289 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 290 cfiscsi_pdu_handle_logout_request(request); 291 break; 292 default: 293 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 294 "opcode 0x%x; dropping connection", 295 request->ip_bhs->bhs_opcode); 296 icl_pdu_free(request); 297 cfiscsi_session_terminate(cs); 298 } 299 300} 301 302static void 303cfiscsi_receive_callback(struct icl_pdu *request) 304{ 305 struct cfiscsi_session *cs; 306 307 cs = PDU_SESSION(request); 308 309#ifdef ICL_KERNEL_PROXY 310 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 311 if (cs->cs_login_pdu == NULL) 312 cs->cs_login_pdu = request; 313 else 314 icl_pdu_free(request); 315 cv_signal(&cs->cs_login_cv); 316 return; 317 } 318#endif 319 320 cfiscsi_pdu_handle(request); 321} 322 323static void 324cfiscsi_error_callback(struct icl_conn *ic) 325{ 326 struct cfiscsi_session *cs; 327 328 cs = CONN_SESSION(ic); 329 330 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 331 cfiscsi_session_terminate(cs); 332} 333 334static int 335cfiscsi_pdu_prepare(struct icl_pdu *response) 336{ 337 struct cfiscsi_session *cs; 338 struct iscsi_bhs_scsi_response *bhssr; 339 bool advance_statsn = true; 340 341 cs = PDU_SESSION(response); 342 343 CFISCSI_SESSION_LOCK_ASSERT(cs); 344 345 /* 346 * We're only using fields common for all the response 347 * (target -> initiator) PDUs. 348 */ 349 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 350 351 /* 352 * 10.8.3: "The StatSN for this connection is not advanced 353 * after this PDU is sent." 354 */ 355 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 356 advance_statsn = false; 357 358 /* 359 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 360 * StatSN for the connection is not advanced after this PDU is sent." 361 */ 362 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 363 bhssr->bhssr_initiator_task_tag == 0xffffffff) 364 advance_statsn = false; 365 366 /* 367 * See the comment below - StatSN is not meaningful and must 368 * not be advanced. 369 */ 370 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 371 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 372 advance_statsn = false; 373 374 /* 375 * 10.7.3: "The fields StatSN, Status, and Residual Count 376 * only have meaningful content if the S bit is set to 1." 377 */ 378 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 379 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 380 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 381 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 382 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 383 384 if (advance_statsn) 385 cs->cs_statsn++; 386 387 return (0); 388} 389 390static void 391cfiscsi_pdu_queue(struct icl_pdu *response) 392{ 393 struct cfiscsi_session *cs; 394 395 cs = PDU_SESSION(response); 396 397 CFISCSI_SESSION_LOCK(cs); 398 cfiscsi_pdu_prepare(response); 399 icl_pdu_queue(response); 400 CFISCSI_SESSION_UNLOCK(cs); 401} 402 403static uint32_t 404cfiscsi_decode_lun(uint64_t encoded) 405{ 406 uint8_t lun[8]; 407 uint32_t result; 408 409 /* 410 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 411 * but is in fact an evil, multidimensional structure defined 412 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 413 */ 414 memcpy(lun, &encoded, sizeof(lun)); 415 switch (lun[0] & 0xC0) { 416 case 0x00: 417 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 418 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 419 CFISCSI_WARN("malformed LUN " 420 "(peripheral device addressing method): 0x%jx", 421 (uintmax_t)encoded); 422 result = 0xffffffff; 423 break; 424 } 425 result = lun[1]; 426 break; 427 case 0x40: 428 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 429 lun[6] != 0 || lun[7] != 0) { 430 CFISCSI_WARN("malformed LUN " 431 "(flat address space addressing method): 0x%jx", 432 (uintmax_t)encoded); 433 result = 0xffffffff; 434 break; 435 } 436 result = ((lun[0] & 0x3f) << 8) + lun[1]; 437 break; 438 case 0xC0: 439 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 440 lun[6] != 0 || lun[7] != 0) { 441 CFISCSI_WARN("malformed LUN (extended flat " 442 "address space addressing method): 0x%jx", 443 (uintmax_t)encoded); 444 result = 0xffffffff; 445 break; 446 } 447 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 448 default: 449 CFISCSI_WARN("unsupported LUN format 0x%jx", 450 (uintmax_t)encoded); 451 result = 0xffffffff; 452 break; 453 } 454 455 return (result); 456} 457 458static void 459cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 460{ 461 struct cfiscsi_session *cs; 462 struct iscsi_bhs_nop_out *bhsno; 463 struct iscsi_bhs_nop_in *bhsni; 464 struct icl_pdu *response; 465 void *data = NULL; 466 size_t datasize; 467 int error; 468 469 cs = PDU_SESSION(request); 470 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 471 472 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 473 /* 474 * Nothing to do, iscsi_pdu_update_statsn() already 475 * zeroed the timeout. 476 */ 477 icl_pdu_free(request); 478 return; 479 } 480 481 datasize = icl_pdu_data_segment_length(request); 482 if (datasize > 0) { 483 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 484 if (data == NULL) { 485 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 486 "dropping connection"); 487 icl_pdu_free(request); 488 cfiscsi_session_terminate(cs); 489 return; 490 } 491 icl_pdu_get_data(request, 0, data, datasize); 492 } 493 494 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 495 if (response == NULL) { 496 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 497 "droppping connection"); 498 free(data, M_CFISCSI); 499 icl_pdu_free(request); 500 cfiscsi_session_terminate(cs); 501 return; 502 } 503 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 504 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 505 bhsni->bhsni_flags = 0x80; 506 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 507 bhsni->bhsni_target_transfer_tag = 0xffffffff; 508 if (datasize > 0) { 509 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 510 if (error != 0) { 511 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 512 "dropping connection"); 513 free(data, M_CFISCSI); 514 icl_pdu_free(request); 515 icl_pdu_free(response); 516 cfiscsi_session_terminate(cs); 517 return; 518 } 519 free(data, M_CFISCSI); 520 } 521 522 icl_pdu_free(request); 523 cfiscsi_pdu_queue(response); 524} 525 526static void 527cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 528{ 529 struct iscsi_bhs_scsi_command *bhssc; 530 struct cfiscsi_session *cs; 531 union ctl_io *io; 532 int error; 533 534 cs = PDU_SESSION(request); 535 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 536 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 537 // bhssc->bhssc_initiator_task_tag); 538 539 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 540 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 541 "ImmediateData=No; dropping connection"); 542 icl_pdu_free(request); 543 cfiscsi_session_terminate(cs); 544 return; 545 } 546 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 547 ctl_zero_io(io); 548 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 549 io->io_hdr.io_type = CTL_IO_SCSI; 550 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 551 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 552 io->io_hdr.nexus.targ_target.id = 0; 553 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 554 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 555 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 556 case BHSSC_FLAGS_ATTR_UNTAGGED: 557 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 558 break; 559 case BHSSC_FLAGS_ATTR_SIMPLE: 560 io->scsiio.tag_type = CTL_TAG_SIMPLE; 561 break; 562 case BHSSC_FLAGS_ATTR_ORDERED: 563 io->scsiio.tag_type = CTL_TAG_ORDERED; 564 break; 565 case BHSSC_FLAGS_ATTR_HOQ: 566 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 567 break; 568 case BHSSC_FLAGS_ATTR_ACA: 569 io->scsiio.tag_type = CTL_TAG_ACA; 570 break; 571 default: 572 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 573 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 574 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 575 break; 576 } 577 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 578 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 579 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 580 error = ctl_queue(io); 581 if (error != CTL_RETVAL_COMPLETE) { 582 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 583 "dropping connection", error); 584 ctl_free_io(io); 585 refcount_release(&cs->cs_outstanding_ctl_pdus); 586 icl_pdu_free(request); 587 cfiscsi_session_terminate(cs); 588 } 589} 590 591static void 592cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 593{ 594 struct iscsi_bhs_task_management_request *bhstmr; 595 struct iscsi_bhs_task_management_response *bhstmr2; 596 struct icl_pdu *response; 597 struct cfiscsi_session *cs; 598 union ctl_io *io; 599 int error; 600 601 cs = PDU_SESSION(request); 602 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 603 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 604 ctl_zero_io(io); 605 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 606 io->io_hdr.io_type = CTL_IO_TASK; 607 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 608 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 609 io->io_hdr.nexus.targ_target.id = 0; 610 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 611 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 612 613 switch (bhstmr->bhstmr_function & ~0x80) { 614 case BHSTMR_FUNCTION_ABORT_TASK: 615#if 0 616 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 617#endif 618 io->taskio.task_action = CTL_TASK_ABORT_TASK; 619 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 620 break; 621 case BHSTMR_FUNCTION_ABORT_TASK_SET: 622#if 0 623 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 624#endif 625 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 626 break; 627 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 628#if 0 629 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 630#endif 631 io->taskio.task_action = CTL_TASK_LUN_RESET; 632 break; 633 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 634#if 0 635 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 636#endif 637 io->taskio.task_action = CTL_TASK_TARGET_RESET; 638 break; 639 default: 640 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 641 bhstmr->bhstmr_function & ~0x80); 642 ctl_free_io(io); 643 644 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 645 if (response == NULL) { 646 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 647 "dropping connection"); 648 icl_pdu_free(request); 649 cfiscsi_session_terminate(cs); 650 return; 651 } 652 bhstmr2 = (struct iscsi_bhs_task_management_response *) 653 response->ip_bhs; 654 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 655 bhstmr2->bhstmr_flags = 0x80; 656 bhstmr2->bhstmr_response = 657 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 658 bhstmr2->bhstmr_initiator_task_tag = 659 bhstmr->bhstmr_initiator_task_tag; 660 icl_pdu_free(request); 661 cfiscsi_pdu_queue(response); 662 return; 663 } 664 665 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 666 error = ctl_queue(io); 667 if (error != CTL_RETVAL_COMPLETE) { 668 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 669 "dropping connection", error); 670 ctl_free_io(io); 671 refcount_release(&cs->cs_outstanding_ctl_pdus); 672 icl_pdu_free(request); 673 cfiscsi_session_terminate(cs); 674 } 675} 676 677static bool 678cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 679{ 680 struct iscsi_bhs_data_out *bhsdo; 681 struct cfiscsi_session *cs; 682 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 683 size_t copy_len, len, off, buffer_offset; 684 int ctl_sg_count; 685 union ctl_io *io; 686 687 cs = PDU_SESSION(request); 688 689 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 690 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 691 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 692 ISCSI_BHS_OPCODE_SCSI_COMMAND, 693 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 694 695 /* 696 * We're only using fields common for Data-Out and SCSI Command PDUs. 697 */ 698 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 699 700 io = cdw->cdw_ctl_io; 701 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 702 ("CTL_FLAG_DATA_IN")); 703 704#if 0 705 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 706 request->ip_data_len, io->scsiio.kern_total_len); 707#endif 708 709 if (io->scsiio.kern_sg_entries > 0) { 710 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 711 ctl_sg_count = io->scsiio.kern_sg_entries; 712 } else { 713 ctl_sglist = &ctl_sg_entry; 714 ctl_sglist->addr = io->scsiio.kern_data_ptr; 715 ctl_sglist->len = io->scsiio.kern_data_len; 716 ctl_sg_count = 1; 717 } 718 719 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 720 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 721 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 722 else 723 buffer_offset = 0; 724 len = icl_pdu_data_segment_length(request); 725 726 /* 727 * Make sure the offset, as sent by the initiator, matches the offset 728 * we're supposed to be at in the scatter-gather list. 729 */ 730 if (buffer_offset > 731 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 732 buffer_offset + len <= 733 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 734 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 735 "expected %zd; dropping connection", buffer_offset, 736 (size_t)io->scsiio.kern_rel_offset + 737 (size_t)io->scsiio.ext_data_filled); 738 ctl_set_data_phase_error(&io->scsiio); 739 cfiscsi_session_terminate(cs); 740 return (true); 741 } 742 743 /* 744 * This is the offset within the PDU data segment, as opposed 745 * to buffer_offset, which is the offset within the task (SCSI 746 * command). 747 */ 748 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 749 buffer_offset; 750 751 /* 752 * Iterate over the scatter/gather segments, filling them with data 753 * from the PDU data segment. Note that this can get called multiple 754 * times for one SCSI command; the cdw structure holds state for the 755 * scatter/gather list. 756 */ 757 for (;;) { 758 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 759 ("cdw->cdw_sg_index >= ctl_sg_count")); 760 if (cdw->cdw_sg_len == 0) { 761 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 762 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 763 } 764 KASSERT(off <= len, ("len > off")); 765 copy_len = len - off; 766 if (copy_len > cdw->cdw_sg_len) 767 copy_len = cdw->cdw_sg_len; 768 769 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 770 cdw->cdw_sg_addr += copy_len; 771 cdw->cdw_sg_len -= copy_len; 772 off += copy_len; 773 io->scsiio.ext_data_filled += copy_len; 774 775 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 io = cdw->cdw_ctl_io; 896 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 897 ("CTL_FLAG_DATA_IN")); 898 899 done = cfiscsi_handle_data_segment(request, cdw); 900 if (done) { 901 CFISCSI_SESSION_LOCK(cs); 902 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 903 CFISCSI_SESSION_UNLOCK(cs); 904 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 905 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 906 uma_zfree(cfiscsi_data_wait_zone, cdw); 907 if (done) 908 io->scsiio.be_move_done(io); 909 else 910 cfiscsi_datamove_out(io); 911 } 912 913 icl_pdu_free(request); 914} 915 916static void 917cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 918{ 919 struct iscsi_bhs_logout_request *bhslr; 920 struct iscsi_bhs_logout_response *bhslr2; 921 struct icl_pdu *response; 922 struct cfiscsi_session *cs; 923 924 cs = PDU_SESSION(request); 925 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 926 switch (bhslr->bhslr_reason & 0x7f) { 927 case BHSLR_REASON_CLOSE_SESSION: 928 case BHSLR_REASON_CLOSE_CONNECTION: 929 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 930 if (response == NULL) { 931 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 932 icl_pdu_free(request); 933 cfiscsi_session_terminate(cs); 934 return; 935 } 936 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 937 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 938 bhslr2->bhslr_flags = 0x80; 939 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 940 bhslr2->bhslr_initiator_task_tag = 941 bhslr->bhslr_initiator_task_tag; 942 icl_pdu_free(request); 943 cfiscsi_pdu_queue(response); 944 cfiscsi_session_terminate(cs); 945 break; 946 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 947 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 948 if (response == NULL) { 949 CFISCSI_SESSION_WARN(cs, 950 "failed to allocate memory; dropping connection"); 951 icl_pdu_free(request); 952 cfiscsi_session_terminate(cs); 953 return; 954 } 955 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 956 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 957 bhslr2->bhslr_flags = 0x80; 958 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 959 bhslr2->bhslr_initiator_task_tag = 960 bhslr->bhslr_initiator_task_tag; 961 icl_pdu_free(request); 962 cfiscsi_pdu_queue(response); 963 break; 964 default: 965 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 966 bhslr->bhslr_reason); 967 icl_pdu_free(request); 968 cfiscsi_session_terminate(cs); 969 break; 970 } 971} 972 973static void 974cfiscsi_callout(void *context) 975{ 976 struct icl_pdu *cp; 977 struct iscsi_bhs_nop_in *bhsni; 978 struct cfiscsi_session *cs; 979 980 cs = context; 981 982 if (cs->cs_terminating) 983 return; 984 985 callout_schedule(&cs->cs_callout, 1 * hz); 986 987 atomic_add_int(&cs->cs_timeout, 1); 988 989#ifdef ICL_KERNEL_PROXY 990 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 991 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 992 CFISCSI_SESSION_WARN(cs, "login timed out after " 993 "%d seconds; dropping connection", cs->cs_timeout); 994 cfiscsi_session_terminate(cs); 995 } 996 return; 997 } 998#endif 999 1000 if (ping_timeout <= 0) { 1001 /* 1002 * Pings are disabled. Don't send NOP-In in this case; 1003 * user might have disabled pings to work around problems 1004 * with certain initiators that can't properly handle 1005 * NOP-In, such as iPXE. Reset the timeout, to avoid 1006 * triggering reconnection, should the user decide to 1007 * reenable them. 1008 */ 1009 cs->cs_timeout = 0; 1010 return; 1011 } 1012 1013 if (cs->cs_timeout >= ping_timeout) { 1014 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1015 "dropping connection", ping_timeout); 1016 cfiscsi_session_terminate(cs); 1017 return; 1018 } 1019 1020 /* 1021 * If the ping was reset less than one second ago - which means 1022 * that we've received some PDU during the last second - assume 1023 * the traffic flows correctly and don't bother sending a NOP-Out. 1024 * 1025 * (It's 2 - one for one second, and one for incrementing is_timeout 1026 * earlier in this routine.) 1027 */ 1028 if (cs->cs_timeout < 2) 1029 return; 1030 1031 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1032 if (cp == NULL) { 1033 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1034 return; 1035 } 1036 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1037 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1038 bhsni->bhsni_flags = 0x80; 1039 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1040 1041 cfiscsi_pdu_queue(cp); 1042} 1043 1044static void 1045cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1046{ 1047 struct cfiscsi_data_wait *cdw; 1048 union ctl_io *io; 1049 int error, last, wait; 1050 1051 if (cs->cs_target == NULL) 1052 return; /* No target yet, so nothing to do. */ 1053 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1054 ctl_zero_io(io); 1055 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1056 io->io_hdr.io_type = CTL_IO_TASK; 1057 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1058 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1059 io->io_hdr.nexus.targ_target.id = 0; 1060 io->io_hdr.nexus.targ_lun = 0; 1061 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1062 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1063 wait = cs->cs_outstanding_ctl_pdus; 1064 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1065 error = ctl_queue(io); 1066 if (error != CTL_RETVAL_COMPLETE) { 1067 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1068 refcount_release(&cs->cs_outstanding_ctl_pdus); 1069 ctl_free_io(io); 1070 } 1071 1072 CFISCSI_SESSION_LOCK(cs); 1073 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1074 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1075 CFISCSI_SESSION_UNLOCK(cs); 1076 /* 1077 * Set nonzero port status; this prevents backends from 1078 * assuming that the data transfer actually succeeded 1079 * and writing uninitialized data to disk. 1080 */ 1081 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1082 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1083 uma_zfree(cfiscsi_data_wait_zone, cdw); 1084 CFISCSI_SESSION_LOCK(cs); 1085 } 1086 CFISCSI_SESSION_UNLOCK(cs); 1087 1088 /* 1089 * Wait for CTL to terminate all the tasks. 1090 */ 1091 if (wait > 0) 1092 CFISCSI_SESSION_WARN(cs, 1093 "waiting for CTL to terminate %d tasks", wait); 1094 for (;;) { 1095 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1096 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1097 if (last != 0) 1098 break; 1099 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1100 0, "cfiscsi_terminate", hz / 100); 1101 } 1102 if (wait > 0) 1103 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1104} 1105 1106static void 1107cfiscsi_maintenance_thread(void *arg) 1108{ 1109 struct cfiscsi_session *cs; 1110 1111 cs = arg; 1112 1113 for (;;) { 1114 CFISCSI_SESSION_LOCK(cs); 1115 if (cs->cs_terminating == false) 1116 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1117 CFISCSI_SESSION_UNLOCK(cs); 1118 1119 if (cs->cs_terminating) { 1120 1121 /* 1122 * We used to wait up to 30 seconds to deliver queued 1123 * PDUs to the initiator. We also tried hard to deliver 1124 * SCSI Responses for the aborted PDUs. We don't do 1125 * that anymore. We might need to revisit that. 1126 */ 1127 callout_drain(&cs->cs_callout); 1128 icl_conn_close(cs->cs_conn); 1129 1130 /* 1131 * At this point ICL receive thread is no longer 1132 * running; no new tasks can be queued. 1133 */ 1134 cfiscsi_session_terminate_tasks(cs); 1135 cfiscsi_session_delete(cs); 1136 kthread_exit(); 1137 return; 1138 } 1139 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1140 } 1141} 1142 1143static void 1144cfiscsi_session_terminate(struct cfiscsi_session *cs) 1145{ 1146 1147 if (cs->cs_terminating) 1148 return; 1149 cs->cs_terminating = true; 1150 cv_signal(&cs->cs_maintenance_cv); 1151#ifdef ICL_KERNEL_PROXY 1152 cv_signal(&cs->cs_login_cv); 1153#endif 1154} 1155 1156static int 1157cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1158{ 1159 struct cfiscsi_target *ct; 1160 char *name; 1161 int i; 1162 1163 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1164 1165 ct = cs->cs_target; 1166 name = strdup(cs->cs_initiator_id, M_CTL); 1167 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1168 if (i < 0) { 1169 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1170 i); 1171 cs->cs_ctl_initid = -1; 1172 return (1); 1173 } 1174 cs->cs_ctl_initid = i; 1175#if 0 1176 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1177#endif 1178 1179 return (0); 1180} 1181 1182static void 1183cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1184{ 1185 int error; 1186 1187 if (cs->cs_ctl_initid == -1) 1188 return; 1189 1190 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1191 if (error != 0) { 1192 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1193 error); 1194 } 1195 cs->cs_ctl_initid = -1; 1196} 1197 1198static struct cfiscsi_session * 1199cfiscsi_session_new(struct cfiscsi_softc *softc) 1200{ 1201 struct cfiscsi_session *cs; 1202 int error; 1203 1204 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1205 if (cs == NULL) { 1206 CFISCSI_WARN("malloc failed"); 1207 return (NULL); 1208 } 1209 cs->cs_ctl_initid = -1; 1210 1211 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1212 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1213 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1214 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1215#ifdef ICL_KERNEL_PROXY 1216 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1217#endif 1218 1219 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1220 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1221 cs->cs_conn->ic_error = cfiscsi_error_callback; 1222 cs->cs_conn->ic_prv0 = cs; 1223 1224 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1225 if (error != 0) { 1226 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1227 free(cs, M_CFISCSI); 1228 return (NULL); 1229 } 1230 1231 mtx_lock(&softc->lock); 1232 cs->cs_id = ++softc->last_session_id; 1233 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1234 mtx_unlock(&softc->lock); 1235 1236 /* 1237 * Start pinging the initiator. 1238 */ 1239 callout_init(&cs->cs_callout, 1); 1240 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1241 1242 return (cs); 1243} 1244 1245static void 1246cfiscsi_session_delete(struct cfiscsi_session *cs) 1247{ 1248 struct cfiscsi_softc *softc; 1249 1250 softc = &cfiscsi_softc; 1251 1252 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1253 ("destroying session with outstanding CTL pdus")); 1254 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1255 ("destroying session with non-empty queue")); 1256 1257 cfiscsi_session_unregister_initiator(cs); 1258 if (cs->cs_target != NULL) 1259 cfiscsi_target_release(cs->cs_target); 1260 icl_conn_close(cs->cs_conn); 1261 icl_conn_free(cs->cs_conn); 1262 1263 mtx_lock(&softc->lock); 1264 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1265 cv_signal(&softc->sessions_cv); 1266 mtx_unlock(&softc->lock); 1267 1268 free(cs, M_CFISCSI); 1269} 1270 1271int 1272cfiscsi_init(void) 1273{ 1274 struct cfiscsi_softc *softc; 1275 int retval; 1276 1277 softc = &cfiscsi_softc; 1278 retval = 0; 1279 bzero(softc, sizeof(*softc)); 1280 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1281 1282 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1283#ifdef ICL_KERNEL_PROXY 1284 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1285#endif 1286 TAILQ_INIT(&softc->sessions); 1287 TAILQ_INIT(&softc->targets); 1288 1289 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1290 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1291 UMA_ALIGN_PTR, 0); 1292 1293 return (0); 1294} 1295 1296#ifdef ICL_KERNEL_PROXY 1297static void 1298cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1299{ 1300 struct cfiscsi_session *cs; 1301 1302 cs = cfiscsi_session_new(&cfiscsi_softc); 1303 if (cs == NULL) { 1304 CFISCSI_WARN("failed to create session"); 1305 return; 1306 } 1307 1308 icl_conn_handoff_sock(cs->cs_conn, so); 1309 cs->cs_initiator_sa = sa; 1310 cs->cs_portal_id = portal_id; 1311 cs->cs_waiting_for_ctld = true; 1312 cv_signal(&cfiscsi_softc.accept_cv); 1313} 1314#endif 1315 1316static void 1317cfiscsi_online(void *arg) 1318{ 1319 struct cfiscsi_softc *softc; 1320 struct cfiscsi_target *ct; 1321 int online; 1322 1323 ct = (struct cfiscsi_target *)arg; 1324 softc = ct->ct_softc; 1325 1326 mtx_lock(&softc->lock); 1327 if (ct->ct_online) { 1328 mtx_unlock(&softc->lock); 1329 return; 1330 } 1331 ct->ct_online = 1; 1332 online = softc->online++; 1333 mtx_unlock(&softc->lock); 1334 if (online > 0) 1335 return; 1336 1337#ifdef ICL_KERNEL_PROXY 1338 if (softc->listener != NULL) 1339 icl_listen_free(softc->listener); 1340 softc->listener = icl_listen_new(cfiscsi_accept); 1341#endif 1342} 1343 1344static void 1345cfiscsi_offline(void *arg) 1346{ 1347 struct cfiscsi_softc *softc; 1348 struct cfiscsi_target *ct; 1349 struct cfiscsi_session *cs; 1350 int online; 1351 1352 ct = (struct cfiscsi_target *)arg; 1353 softc = ct->ct_softc; 1354 1355 mtx_lock(&softc->lock); 1356 if (!ct->ct_online) { 1357 mtx_unlock(&softc->lock); 1358 return; 1359 } 1360 ct->ct_online = 0; 1361 online = --softc->online; 1362 1363 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1364 if (cs->cs_target == ct) 1365 cfiscsi_session_terminate(cs); 1366 } 1367 do { 1368 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1369 if (cs->cs_target == ct) 1370 break; 1371 } 1372 if (cs != NULL) 1373 cv_wait(&softc->sessions_cv, &softc->lock); 1374 } while (cs != NULL && ct->ct_online == 0); 1375 mtx_unlock(&softc->lock); 1376 if (online > 0) 1377 return; 1378 1379#ifdef ICL_KERNEL_PROXY 1380 icl_listen_free(softc->listener); 1381 softc->listener = NULL; 1382#endif 1383} 1384 1385static int 1386cfiscsi_info(void *arg, struct sbuf *sb) 1387{ 1388 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1389 int retval; 1390 1391 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1392 ct->ct_state); 1393 return (retval); 1394} 1395 1396static void 1397cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1398{ 1399 struct cfiscsi_softc *softc; 1400 struct cfiscsi_session *cs, *cs2; 1401 struct cfiscsi_target *ct; 1402 struct ctl_iscsi_handoff_params *cihp; 1403 int error; 1404 1405 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1406 softc = &cfiscsi_softc; 1407 1408 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1409 cihp->initiator_name, cihp->initiator_addr, 1410 cihp->target_name); 1411 1412 ct = cfiscsi_target_find(softc, cihp->target_name); 1413 if (ct == NULL) { 1414 ci->status = CTL_ISCSI_ERROR; 1415 snprintf(ci->error_str, sizeof(ci->error_str), 1416 "%s: target not found", __func__); 1417 return; 1418 } 1419 1420#ifdef ICL_KERNEL_PROXY 1421 if (cihp->socket > 0 && cihp->connection_id > 0) { 1422 snprintf(ci->error_str, sizeof(ci->error_str), 1423 "both socket and connection_id set"); 1424 ci->status = CTL_ISCSI_ERROR; 1425 cfiscsi_target_release(ct); 1426 return; 1427 } 1428 if (cihp->socket == 0) { 1429 mtx_lock(&cfiscsi_softc.lock); 1430 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1431 if (cs->cs_id == cihp->connection_id) 1432 break; 1433 } 1434 if (cs == NULL) { 1435 mtx_unlock(&cfiscsi_softc.lock); 1436 snprintf(ci->error_str, sizeof(ci->error_str), 1437 "connection not found"); 1438 ci->status = CTL_ISCSI_ERROR; 1439 cfiscsi_target_release(ct); 1440 return; 1441 } 1442 mtx_unlock(&cfiscsi_softc.lock); 1443 } else { 1444#endif 1445 cs = cfiscsi_session_new(softc); 1446 if (cs == NULL) { 1447 ci->status = CTL_ISCSI_ERROR; 1448 snprintf(ci->error_str, sizeof(ci->error_str), 1449 "%s: cfiscsi_session_new failed", __func__); 1450 cfiscsi_target_release(ct); 1451 return; 1452 } 1453#ifdef ICL_KERNEL_PROXY 1454 } 1455#endif 1456 1457 /* 1458 * First PDU of Full Feature phase has the same CmdSN as the last 1459 * PDU from the Login Phase received from the initiator. Thus, 1460 * the -1 below. 1461 */ 1462 cs->cs_portal_group_tag = cihp->portal_group_tag; 1463 cs->cs_cmdsn = cihp->cmdsn; 1464 cs->cs_statsn = cihp->statsn; 1465 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1466 cs->cs_max_burst_length = cihp->max_burst_length; 1467 cs->cs_immediate_data = !!cihp->immediate_data; 1468 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1469 cs->cs_conn->ic_header_crc32c = true; 1470 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1471 cs->cs_conn->ic_data_crc32c = true; 1472 1473 strlcpy(cs->cs_initiator_name, 1474 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1475 strlcpy(cs->cs_initiator_addr, 1476 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1477 strlcpy(cs->cs_initiator_alias, 1478 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1479 memcpy(cs->cs_initiator_isid, 1480 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1481 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1482 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1483 cihp->initiator_isid[0], cihp->initiator_isid[1], 1484 cihp->initiator_isid[2], cihp->initiator_isid[3], 1485 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1486 1487 mtx_lock(&softc->lock); 1488 if (ct->ct_online == 0) { 1489 mtx_unlock(&softc->lock); 1490 cfiscsi_session_terminate(cs); 1491 cfiscsi_target_release(ct); 1492 ci->status = CTL_ISCSI_ERROR; 1493 snprintf(ci->error_str, sizeof(ci->error_str), 1494 "%s: port offline", __func__); 1495 return; 1496 } 1497 cs->cs_target = ct; 1498 mtx_unlock(&softc->lock); 1499 1500 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1501restart: 1502 if (!cs->cs_terminating) { 1503 mtx_lock(&softc->lock); 1504 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1505 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1506 cs->cs_target == cs2->cs_target && 1507 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1508 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1509 cfiscsi_session_terminate(cs2); 1510 mtx_unlock(&softc->lock); 1511 pause("cfiscsi_reinstate", 1); 1512 goto restart; 1513 } 1514 } 1515 mtx_unlock(&softc->lock); 1516 } 1517 1518 /* 1519 * Register initiator with CTL. 1520 */ 1521 cfiscsi_session_register_initiator(cs); 1522 1523#ifdef ICL_KERNEL_PROXY 1524 if (cihp->socket > 0) { 1525#endif 1526 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1527 if (error != 0) { 1528 cfiscsi_session_terminate(cs); 1529 refcount_release(&cs->cs_outstanding_ctl_pdus); 1530 ci->status = CTL_ISCSI_ERROR; 1531 snprintf(ci->error_str, sizeof(ci->error_str), 1532 "%s: icl_conn_handoff failed with error %d", 1533 __func__, error); 1534 return; 1535 } 1536#ifdef ICL_KERNEL_PROXY 1537 } 1538#endif 1539 1540#ifdef ICL_KERNEL_PROXY 1541 cs->cs_login_phase = false; 1542 1543 /* 1544 * First PDU of the Full Feature phase has likely already arrived. 1545 * We have to pick it up and execute properly. 1546 */ 1547 if (cs->cs_login_pdu != NULL) { 1548 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1549 cfiscsi_pdu_handle(cs->cs_login_pdu); 1550 cs->cs_login_pdu = NULL; 1551 } 1552#endif 1553 1554 refcount_release(&cs->cs_outstanding_ctl_pdus); 1555 ci->status = CTL_ISCSI_OK; 1556} 1557 1558static void 1559cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1560{ 1561 struct ctl_iscsi_list_params *cilp; 1562 struct cfiscsi_session *cs; 1563 struct cfiscsi_softc *softc; 1564 struct sbuf *sb; 1565 int error; 1566 1567 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1568 softc = &cfiscsi_softc; 1569 1570 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1571 if (sb == NULL) { 1572 ci->status = CTL_ISCSI_ERROR; 1573 snprintf(ci->error_str, sizeof(ci->error_str), 1574 "Unable to allocate %d bytes for iSCSI session list", 1575 cilp->alloc_len); 1576 return; 1577 } 1578 1579 sbuf_printf(sb, "<ctlislist>\n"); 1580 mtx_lock(&softc->lock); 1581 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1582#ifdef ICL_KERNEL_PROXY 1583 if (cs->cs_target == NULL) 1584 continue; 1585#endif 1586 error = sbuf_printf(sb, "<connection id=\"%d\">" 1587 "<initiator>%s</initiator>" 1588 "<initiator_addr>%s</initiator_addr>" 1589 "<initiator_alias>%s</initiator_alias>" 1590 "<target>%s</target>" 1591 "<target_alias>%s</target_alias>" 1592 "<header_digest>%s</header_digest>" 1593 "<data_digest>%s</data_digest>" 1594 "<max_data_segment_length>%zd</max_data_segment_length>" 1595 "<immediate_data>%d</immediate_data>" 1596 "<iser>%d</iser>" 1597 "</connection>\n", 1598 cs->cs_id, 1599 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1600 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1601 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1602 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1603 cs->cs_max_data_segment_length, 1604 cs->cs_immediate_data, 1605 cs->cs_conn->ic_iser); 1606 if (error != 0) 1607 break; 1608 } 1609 mtx_unlock(&softc->lock); 1610 error = sbuf_printf(sb, "</ctlislist>\n"); 1611 if (error != 0) { 1612 sbuf_delete(sb); 1613 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1614 snprintf(ci->error_str, sizeof(ci->error_str), 1615 "Out of space, %d bytes is too small", cilp->alloc_len); 1616 return; 1617 } 1618 sbuf_finish(sb); 1619 1620 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1621 cilp->fill_len = sbuf_len(sb) + 1; 1622 ci->status = CTL_ISCSI_OK; 1623 sbuf_delete(sb); 1624} 1625 1626static void 1627cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1628{ 1629 struct icl_pdu *response; 1630 struct iscsi_bhs_asynchronous_message *bhsam; 1631 struct ctl_iscsi_terminate_params *citp; 1632 struct cfiscsi_session *cs; 1633 struct cfiscsi_softc *softc; 1634 int found = 0; 1635 1636 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1637 softc = &cfiscsi_softc; 1638 1639 mtx_lock(&softc->lock); 1640 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1641 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1642 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1643 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1644 continue; 1645 1646 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1647 if (response == NULL) { 1648 /* 1649 * Oh well. Just terminate the connection. 1650 */ 1651 } else { 1652 bhsam = (struct iscsi_bhs_asynchronous_message *) 1653 response->ip_bhs; 1654 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1655 bhsam->bhsam_flags = 0x80; 1656 bhsam->bhsam_0xffffffff = 0xffffffff; 1657 bhsam->bhsam_async_event = 1658 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1659 cfiscsi_pdu_queue(response); 1660 } 1661 cfiscsi_session_terminate(cs); 1662 found++; 1663 } 1664 mtx_unlock(&softc->lock); 1665 1666 if (found == 0) { 1667 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1668 snprintf(ci->error_str, sizeof(ci->error_str), 1669 "No matching connections found"); 1670 return; 1671 } 1672 1673 ci->status = CTL_ISCSI_OK; 1674} 1675 1676static void 1677cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1678{ 1679 struct icl_pdu *response; 1680 struct iscsi_bhs_asynchronous_message *bhsam; 1681 struct ctl_iscsi_logout_params *cilp; 1682 struct cfiscsi_session *cs; 1683 struct cfiscsi_softc *softc; 1684 int found = 0; 1685 1686 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1687 softc = &cfiscsi_softc; 1688 1689 mtx_lock(&softc->lock); 1690 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1691 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1692 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1693 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1694 continue; 1695 1696 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1697 if (response == NULL) { 1698 ci->status = CTL_ISCSI_ERROR; 1699 snprintf(ci->error_str, sizeof(ci->error_str), 1700 "Unable to allocate memory"); 1701 mtx_unlock(&softc->lock); 1702 return; 1703 } 1704 bhsam = 1705 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1706 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1707 bhsam->bhsam_flags = 0x80; 1708 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1709 bhsam->bhsam_parameter3 = htons(10); 1710 cfiscsi_pdu_queue(response); 1711 found++; 1712 } 1713 mtx_unlock(&softc->lock); 1714 1715 if (found == 0) { 1716 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1717 snprintf(ci->error_str, sizeof(ci->error_str), 1718 "No matching connections found"); 1719 return; 1720 } 1721 1722 ci->status = CTL_ISCSI_OK; 1723} 1724 1725#ifdef ICL_KERNEL_PROXY 1726static void 1727cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1728{ 1729 struct ctl_iscsi_listen_params *cilp; 1730 struct sockaddr *sa; 1731 int error; 1732 1733 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1734 1735 if (cfiscsi_softc.listener == NULL) { 1736 CFISCSI_DEBUG("no listener"); 1737 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1738 ci->status = CTL_ISCSI_ERROR; 1739 return; 1740 } 1741 1742 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1743 if (error != 0) { 1744 CFISCSI_DEBUG("getsockaddr, error %d", error); 1745 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1746 ci->status = CTL_ISCSI_ERROR; 1747 return; 1748 } 1749 1750 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1751 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1752 if (error != 0) { 1753 free(sa, M_SONAME); 1754 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1755 snprintf(ci->error_str, sizeof(ci->error_str), 1756 "icl_listen_add failed, error %d", error); 1757 ci->status = CTL_ISCSI_ERROR; 1758 return; 1759 } 1760 1761 ci->status = CTL_ISCSI_OK; 1762} 1763 1764static void 1765cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1766{ 1767 struct ctl_iscsi_accept_params *ciap; 1768 struct cfiscsi_session *cs; 1769 int error; 1770 1771 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1772 1773 mtx_lock(&cfiscsi_softc.lock); 1774 for (;;) { 1775 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1776 if (cs->cs_waiting_for_ctld) 1777 break; 1778 } 1779 if (cs != NULL) 1780 break; 1781 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1782 if (error != 0) { 1783 mtx_unlock(&cfiscsi_softc.lock); 1784 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1785 ci->status = CTL_ISCSI_ERROR; 1786 return; 1787 } 1788 } 1789 mtx_unlock(&cfiscsi_softc.lock); 1790 1791 cs->cs_waiting_for_ctld = false; 1792 cs->cs_login_phase = true; 1793 1794 ciap->connection_id = cs->cs_id; 1795 ciap->portal_id = cs->cs_portal_id; 1796 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1797 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1798 cs->cs_initiator_sa->sa_len); 1799 if (error != 0) { 1800 snprintf(ci->error_str, sizeof(ci->error_str), 1801 "copyout failed with error %d", error); 1802 ci->status = CTL_ISCSI_ERROR; 1803 return; 1804 } 1805 1806 ci->status = CTL_ISCSI_OK; 1807} 1808 1809static void 1810cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1811{ 1812 struct ctl_iscsi_send_params *cisp; 1813 struct cfiscsi_session *cs; 1814 struct icl_pdu *ip; 1815 size_t datalen; 1816 void *data; 1817 int error; 1818 1819 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1820 1821 mtx_lock(&cfiscsi_softc.lock); 1822 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1823 if (cs->cs_id == cisp->connection_id) 1824 break; 1825 } 1826 if (cs == NULL) { 1827 mtx_unlock(&cfiscsi_softc.lock); 1828 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1829 ci->status = CTL_ISCSI_ERROR; 1830 return; 1831 } 1832 mtx_unlock(&cfiscsi_softc.lock); 1833 1834#if 0 1835 if (cs->cs_login_phase == false) 1836 return (EBUSY); 1837#endif 1838 1839 if (cs->cs_terminating) { 1840 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1841 ci->status = CTL_ISCSI_ERROR; 1842 return; 1843 } 1844 1845 datalen = cisp->data_segment_len; 1846 /* 1847 * XXX 1848 */ 1849 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1850 if (datalen > 65535) { 1851 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1852 ci->status = CTL_ISCSI_ERROR; 1853 return; 1854 } 1855 if (datalen > 0) { 1856 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1857 error = copyin(cisp->data_segment, data, datalen); 1858 if (error != 0) { 1859 free(data, M_CFISCSI); 1860 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1861 ci->status = CTL_ISCSI_ERROR; 1862 return; 1863 } 1864 } 1865 1866 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1867 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1868 if (datalen > 0) { 1869 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1870 free(data, M_CFISCSI); 1871 } 1872 CFISCSI_SESSION_LOCK(cs); 1873 icl_pdu_queue(ip); 1874 CFISCSI_SESSION_UNLOCK(cs); 1875 ci->status = CTL_ISCSI_OK; 1876} 1877 1878static void 1879cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1880{ 1881 struct ctl_iscsi_receive_params *cirp; 1882 struct cfiscsi_session *cs; 1883 struct icl_pdu *ip; 1884 void *data; 1885 int error; 1886 1887 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1888 1889 mtx_lock(&cfiscsi_softc.lock); 1890 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1891 if (cs->cs_id == cirp->connection_id) 1892 break; 1893 } 1894 if (cs == NULL) { 1895 mtx_unlock(&cfiscsi_softc.lock); 1896 snprintf(ci->error_str, sizeof(ci->error_str), 1897 "connection not found"); 1898 ci->status = CTL_ISCSI_ERROR; 1899 return; 1900 } 1901 mtx_unlock(&cfiscsi_softc.lock); 1902 1903#if 0 1904 if (is->is_login_phase == false) 1905 return (EBUSY); 1906#endif 1907 1908 CFISCSI_SESSION_LOCK(cs); 1909 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1910 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1911 if (error != 0) { 1912 CFISCSI_SESSION_UNLOCK(cs); 1913 snprintf(ci->error_str, sizeof(ci->error_str), 1914 "interrupted by signal"); 1915 ci->status = CTL_ISCSI_ERROR; 1916 return; 1917 } 1918 } 1919 1920 if (cs->cs_terminating) { 1921 CFISCSI_SESSION_UNLOCK(cs); 1922 snprintf(ci->error_str, sizeof(ci->error_str), 1923 "connection terminating"); 1924 ci->status = CTL_ISCSI_ERROR; 1925 return; 1926 } 1927 ip = cs->cs_login_pdu; 1928 cs->cs_login_pdu = NULL; 1929 CFISCSI_SESSION_UNLOCK(cs); 1930 1931 if (ip->ip_data_len > cirp->data_segment_len) { 1932 icl_pdu_free(ip); 1933 snprintf(ci->error_str, sizeof(ci->error_str), 1934 "data segment too big"); 1935 ci->status = CTL_ISCSI_ERROR; 1936 return; 1937 } 1938 1939 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1940 if (ip->ip_data_len > 0) { 1941 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1942 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1943 copyout(data, cirp->data_segment, ip->ip_data_len); 1944 free(data, M_CFISCSI); 1945 } 1946 1947 icl_pdu_free(ip); 1948 ci->status = CTL_ISCSI_OK; 1949} 1950 1951#endif /* !ICL_KERNEL_PROXY */ 1952 1953static void 1954cfiscsi_ioctl_port_create(struct ctl_req *req) 1955{ 1956 struct cfiscsi_target *ct; 1957 struct ctl_port *port; 1958 const char *target, *alias, *tag; 1959 struct scsi_vpd_id_descriptor *desc; 1960 ctl_options_t opts; 1961 int retval, len, idlen; 1962 1963 ctl_init_opts(&opts, req->num_args, req->kern_args); 1964 target = ctl_get_opt(&opts, "cfiscsi_target"); 1965 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1966 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1967 if (target == NULL || tag == NULL) { 1968 req->status = CTL_LUN_ERROR; 1969 snprintf(req->error_str, sizeof(req->error_str), 1970 "Missing required argument"); 1971 ctl_free_opts(&opts); 1972 return; 1973 } 1974 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1975 if (ct == NULL) { 1976 req->status = CTL_LUN_ERROR; 1977 snprintf(req->error_str, sizeof(req->error_str), 1978 "failed to create target \"%s\"", target); 1979 ctl_free_opts(&opts); 1980 return; 1981 } 1982 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1983 req->status = CTL_LUN_ERROR; 1984 snprintf(req->error_str, sizeof(req->error_str), 1985 "target \"%s\" already exists", target); 1986 cfiscsi_target_release(ct); 1987 ctl_free_opts(&opts); 1988 return; 1989 } 1990 port = &ct->ct_port; 1991 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 1992 goto done; 1993 1994 port->frontend = &cfiscsi_frontend; 1995 port->port_type = CTL_PORT_ISCSI; 1996 /* XXX KDM what should the real number be here? */ 1997 port->num_requested_ctl_io = 4096; 1998 port->port_name = "iscsi"; 1999 port->physical_port = strtoul(tag, NULL, 0); 2000 port->virtual_port = ct->ct_target_id; 2001 port->port_online = cfiscsi_online; 2002 port->port_offline = cfiscsi_offline; 2003 port->port_info = cfiscsi_info; 2004 port->onoff_arg = ct; 2005 port->lun_enable = cfiscsi_lun_enable; 2006 port->lun_disable = cfiscsi_lun_disable; 2007 port->lun_map = cfiscsi_lun_map; 2008 port->targ_lun_arg = ct; 2009 port->fe_datamove = cfiscsi_datamove; 2010 port->fe_done = cfiscsi_done; 2011 2012 /* XXX KDM what should we report here? */ 2013 /* XXX These should probably be fetched from CTL. */ 2014 port->max_targets = 1; 2015 port->max_target_id = 15; 2016 2017 port->options = opts; 2018 STAILQ_INIT(&opts); 2019 2020 /* Generate Port ID. */ 2021 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2022 idlen = roundup2(idlen, 4); 2023 len = sizeof(struct scsi_vpd_device_id) + idlen; 2024 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2025 M_CTL, M_WAITOK | M_ZERO); 2026 port->port_devid->len = len; 2027 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2028 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2029 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2030 SVPD_ID_TYPE_SCSI_NAME; 2031 desc->length = idlen; 2032 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2033 target, port->physical_port); 2034 2035 /* Generate Target ID. */ 2036 idlen = strlen(target) + 1; 2037 idlen = roundup2(idlen, 4); 2038 len = sizeof(struct scsi_vpd_device_id) + idlen; 2039 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2040 M_CTL, M_WAITOK | M_ZERO); 2041 port->target_devid->len = len; 2042 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2043 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2044 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2045 SVPD_ID_TYPE_SCSI_NAME; 2046 desc->length = idlen; 2047 strlcpy(desc->identifier, target, idlen); 2048 2049 retval = ctl_port_register(port); 2050 if (retval != 0) { 2051 ctl_free_opts(&port->options); 2052 cfiscsi_target_release(ct); 2053 free(port->port_devid, M_CFISCSI); 2054 free(port->target_devid, M_CFISCSI); 2055 req->status = CTL_LUN_ERROR; 2056 snprintf(req->error_str, sizeof(req->error_str), 2057 "ctl_frontend_register() failed with error %d", retval); 2058 return; 2059 } 2060done: 2061 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2062 req->status = CTL_LUN_OK; 2063 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2064 sizeof(port->targ_port)); //XXX 2065} 2066 2067static void 2068cfiscsi_ioctl_port_remove(struct ctl_req *req) 2069{ 2070 struct cfiscsi_target *ct; 2071 const char *target; 2072 ctl_options_t opts; 2073 2074 ctl_init_opts(&opts, req->num_args, req->kern_args); 2075 target = ctl_get_opt(&opts, "cfiscsi_target"); 2076 if (target == NULL) { 2077 ctl_free_opts(&opts); 2078 req->status = CTL_LUN_ERROR; 2079 snprintf(req->error_str, sizeof(req->error_str), 2080 "Missing required argument"); 2081 return; 2082 } 2083 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2084 if (ct == NULL) { 2085 ctl_free_opts(&opts); 2086 req->status = CTL_LUN_ERROR; 2087 snprintf(req->error_str, sizeof(req->error_str), 2088 "can't find target \"%s\"", target); 2089 return; 2090 } 2091 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2092 ctl_free_opts(&opts); 2093 req->status = CTL_LUN_ERROR; 2094 snprintf(req->error_str, sizeof(req->error_str), 2095 "target \"%s\" is already dying", target); 2096 return; 2097 } 2098 ctl_free_opts(&opts); 2099 2100 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2101 ctl_port_offline(&ct->ct_port); 2102 cfiscsi_target_release(ct); 2103 cfiscsi_target_release(ct); 2104} 2105 2106static int 2107cfiscsi_ioctl(struct cdev *dev, 2108 u_long cmd, caddr_t addr, int flag, struct thread *td) 2109{ 2110 struct ctl_iscsi *ci; 2111 struct ctl_req *req; 2112 2113 if (cmd == CTL_PORT_REQ) { 2114 req = (struct ctl_req *)addr; 2115 switch (req->reqtype) { 2116 case CTL_REQ_CREATE: 2117 cfiscsi_ioctl_port_create(req); 2118 break; 2119 case CTL_REQ_REMOVE: 2120 cfiscsi_ioctl_port_remove(req); 2121 break; 2122 default: 2123 req->status = CTL_LUN_ERROR; 2124 snprintf(req->error_str, sizeof(req->error_str), 2125 "Unsupported request type %d", req->reqtype); 2126 } 2127 return (0); 2128 } 2129 2130 if (cmd != CTL_ISCSI) 2131 return (ENOTTY); 2132 2133 ci = (struct ctl_iscsi *)addr; 2134 switch (ci->type) { 2135 case CTL_ISCSI_HANDOFF: 2136 cfiscsi_ioctl_handoff(ci); 2137 break; 2138 case CTL_ISCSI_LIST: 2139 cfiscsi_ioctl_list(ci); 2140 break; 2141 case CTL_ISCSI_TERMINATE: 2142 cfiscsi_ioctl_terminate(ci); 2143 break; 2144 case CTL_ISCSI_LOGOUT: 2145 cfiscsi_ioctl_logout(ci); 2146 break; 2147#ifdef ICL_KERNEL_PROXY 2148 case CTL_ISCSI_LISTEN: 2149 cfiscsi_ioctl_listen(ci); 2150 break; 2151 case CTL_ISCSI_ACCEPT: 2152 cfiscsi_ioctl_accept(ci); 2153 break; 2154 case CTL_ISCSI_SEND: 2155 cfiscsi_ioctl_send(ci); 2156 break; 2157 case CTL_ISCSI_RECEIVE: 2158 cfiscsi_ioctl_receive(ci); 2159 break; 2160#else 2161 case CTL_ISCSI_LISTEN: 2162 case CTL_ISCSI_ACCEPT: 2163 case CTL_ISCSI_SEND: 2164 case CTL_ISCSI_RECEIVE: 2165 ci->status = CTL_ISCSI_ERROR; 2166 snprintf(ci->error_str, sizeof(ci->error_str), 2167 "%s: CTL compiled without ICL_KERNEL_PROXY", 2168 __func__); 2169 break; 2170#endif /* !ICL_KERNEL_PROXY */ 2171 default: 2172 ci->status = CTL_ISCSI_ERROR; 2173 snprintf(ci->error_str, sizeof(ci->error_str), 2174 "%s: invalid iSCSI request type %d", __func__, ci->type); 2175 break; 2176 } 2177 2178 return (0); 2179} 2180 2181static void 2182cfiscsi_target_hold(struct cfiscsi_target *ct) 2183{ 2184 2185 refcount_acquire(&ct->ct_refcount); 2186} 2187 2188static void 2189cfiscsi_target_release(struct cfiscsi_target *ct) 2190{ 2191 struct cfiscsi_softc *softc; 2192 2193 softc = ct->ct_softc; 2194 mtx_lock(&softc->lock); 2195 if (refcount_release(&ct->ct_refcount)) { 2196 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2197 mtx_unlock(&softc->lock); 2198 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2199 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2200 if (ctl_port_deregister(&ct->ct_port) != 0) 2201 printf("%s: ctl_port_deregister() failed\n", 2202 __func__); 2203 } 2204 free(ct, M_CFISCSI); 2205 2206 return; 2207 } 2208 mtx_unlock(&softc->lock); 2209} 2210 2211static struct cfiscsi_target * 2212cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2213{ 2214 struct cfiscsi_target *ct; 2215 2216 mtx_lock(&softc->lock); 2217 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2218 if (strcmp(name, ct->ct_name) != 0 || 2219 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2220 continue; 2221 cfiscsi_target_hold(ct); 2222 mtx_unlock(&softc->lock); 2223 return (ct); 2224 } 2225 mtx_unlock(&softc->lock); 2226 2227 return (NULL); 2228} 2229 2230static struct cfiscsi_target * 2231cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2232 const char *alias) 2233{ 2234 struct cfiscsi_target *ct, *newct; 2235 int i; 2236 2237 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2238 return (NULL); 2239 2240 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2241 2242 mtx_lock(&softc->lock); 2243 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2244 if (strcmp(name, ct->ct_name) != 0 || 2245 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2246 continue; 2247 cfiscsi_target_hold(ct); 2248 mtx_unlock(&softc->lock); 2249 free(newct, M_CFISCSI); 2250 return (ct); 2251 } 2252 2253 for (i = 0; i < CTL_MAX_LUNS; i++) 2254 newct->ct_luns[i] = UINT32_MAX; 2255 2256 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2257 if (alias != NULL) 2258 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2259 refcount_init(&newct->ct_refcount, 1); 2260 newct->ct_softc = softc; 2261 if (TAILQ_EMPTY(&softc->targets)) 2262 softc->last_target_id = 0; 2263 newct->ct_target_id = ++softc->last_target_id; 2264 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2265 mtx_unlock(&softc->lock); 2266 2267 return (newct); 2268} 2269 2270/* 2271 * Takes LUN from the target space and returns LUN from the CTL space. 2272 */ 2273static uint32_t 2274cfiscsi_lun_map(void *arg, uint32_t lun) 2275{ 2276 struct cfiscsi_target *ct = arg; 2277 2278 if (lun >= CTL_MAX_LUNS) { 2279 CFISCSI_DEBUG("requested lun number %d is higher " 2280 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2281 return (UINT32_MAX); 2282 } 2283 return (ct->ct_luns[lun]); 2284} 2285 2286static int 2287cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2288 unsigned long lun_id, unsigned long ctl_lun_id) 2289{ 2290 2291 if (lun_id >= CTL_MAX_LUNS) { 2292 CFISCSI_WARN("requested lun number %ld is higher " 2293 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2294 return (-1); 2295 } 2296 2297 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2298 /* 2299 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2300 * when the LUN is created, and a second time just before 2301 * the port is brought online; don't emit warnings 2302 * for that case. 2303 */ 2304 if (ct->ct_luns[lun_id] == ctl_lun_id) 2305 return (0); 2306 CFISCSI_WARN("lun %ld already allocated", lun_id); 2307 return (-1); 2308 } 2309 2310#if 0 2311 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2312 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2313#endif 2314 2315 ct->ct_luns[lun_id] = ctl_lun_id; 2316 2317 return (0); 2318} 2319 2320static int 2321cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2322{ 2323 struct cfiscsi_softc *softc; 2324 struct cfiscsi_target *ct; 2325 const char *target = NULL; 2326 const char *lun = NULL; 2327 unsigned long tmp; 2328 2329 ct = (struct cfiscsi_target *)arg; 2330 softc = ct->ct_softc; 2331 2332 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2333 "cfiscsi_target"); 2334 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2335 "cfiscsi_lun"); 2336 2337 if (target == NULL && lun == NULL) 2338 return (0); 2339 2340 if (target == NULL || lun == NULL) { 2341 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2342 "cfiscsi_lun, or the other way around; ignoring"); 2343 return (0); 2344 } 2345 2346 if (strcmp(target, ct->ct_name) != 0) 2347 return (0); 2348 2349 tmp = strtoul(lun, NULL, 10); 2350 cfiscsi_target_set_lun(ct, tmp, lun_id); 2351 return (0); 2352} 2353 2354static int 2355cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2356{ 2357 struct cfiscsi_softc *softc; 2358 struct cfiscsi_target *ct; 2359 int i; 2360 2361 ct = (struct cfiscsi_target *)arg; 2362 softc = ct->ct_softc; 2363 2364 mtx_lock(&softc->lock); 2365 for (i = 0; i < CTL_MAX_LUNS; i++) { 2366 if (ct->ct_luns[i] != lun_id) 2367 continue; 2368 ct->ct_luns[i] = UINT32_MAX; 2369 break; 2370 } 2371 mtx_unlock(&softc->lock); 2372 return (0); 2373} 2374 2375static void 2376cfiscsi_datamove_in(union ctl_io *io) 2377{ 2378 struct cfiscsi_session *cs; 2379 struct icl_pdu *request, *response; 2380 const struct iscsi_bhs_scsi_command *bhssc; 2381 struct iscsi_bhs_data_in *bhsdi; 2382 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2383 size_t len, expected_len, sg_len, buffer_offset; 2384 const char *sg_addr; 2385 int ctl_sg_count, error, i; 2386 2387 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2388 cs = PDU_SESSION(request); 2389 2390 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2391 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2392 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2393 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2394 2395 if (io->scsiio.kern_sg_entries > 0) { 2396 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2397 ctl_sg_count = io->scsiio.kern_sg_entries; 2398 } else { 2399 ctl_sglist = &ctl_sg_entry; 2400 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2401 ctl_sglist->len = io->scsiio.kern_data_len; 2402 ctl_sg_count = 1; 2403 } 2404 2405 /* 2406 * This is the total amount of data to be transferred within the current 2407 * SCSI command. We need to record it so that we can properly report 2408 * underflow/underflow. 2409 */ 2410 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2411 2412 /* 2413 * This is the offset within the current SCSI command; for the first 2414 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2415 * it will be the sum of lengths of previous ones. 2416 */ 2417 buffer_offset = io->scsiio.kern_rel_offset; 2418 2419 /* 2420 * This is the transfer length expected by the initiator. In theory, 2421 * it could be different from the correct amount of data from the SCSI 2422 * point of view, even if that doesn't make any sense. 2423 */ 2424 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2425#if 0 2426 if (expected_len != io->scsiio.kern_total_len) { 2427 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2428 "actual length %zd", expected_len, 2429 (size_t)io->scsiio.kern_total_len); 2430 } 2431#endif 2432 2433 if (buffer_offset >= expected_len) { 2434#if 0 2435 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2436 "already sent the expected len", buffer_offset); 2437#endif 2438 io->scsiio.be_move_done(io); 2439 return; 2440 } 2441 2442 i = 0; 2443 sg_addr = NULL; 2444 sg_len = 0; 2445 response = NULL; 2446 bhsdi = NULL; 2447 for (;;) { 2448 if (response == NULL) { 2449 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2450 if (response == NULL) { 2451 CFISCSI_SESSION_WARN(cs, "failed to " 2452 "allocate memory; dropping connection"); 2453 ctl_set_busy(&io->scsiio); 2454 io->scsiio.be_move_done(io); 2455 cfiscsi_session_terminate(cs); 2456 return; 2457 } 2458 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2459 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2460 bhsdi->bhsdi_initiator_task_tag = 2461 bhssc->bhssc_initiator_task_tag; 2462 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2463 PDU_EXPDATASN(request)++; 2464 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2465 } 2466 2467 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2468 if (sg_len == 0) { 2469 sg_addr = ctl_sglist[i].addr; 2470 sg_len = ctl_sglist[i].len; 2471 KASSERT(sg_len > 0, ("sg_len <= 0")); 2472 } 2473 2474 len = sg_len; 2475 2476 /* 2477 * Truncate to maximum data segment length. 2478 */ 2479 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2480 ("ip_data_len %zd >= max_data_segment_length %zd", 2481 response->ip_data_len, cs->cs_max_data_segment_length)); 2482 if (response->ip_data_len + len > 2483 cs->cs_max_data_segment_length) { 2484 len = cs->cs_max_data_segment_length - 2485 response->ip_data_len; 2486 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2487 len, sg_len)); 2488 } 2489 2490 /* 2491 * Truncate to expected data transfer length. 2492 */ 2493 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2494 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2495 buffer_offset, response->ip_data_len, expected_len)); 2496 if (buffer_offset + response->ip_data_len + len > expected_len) { 2497 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2498 "to expected data transfer length %zd", 2499 buffer_offset + response->ip_data_len + len, expected_len); 2500 len = expected_len - (buffer_offset + response->ip_data_len); 2501 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2502 len, sg_len)); 2503 } 2504 2505 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2506 if (error != 0) { 2507 CFISCSI_SESSION_WARN(cs, "failed to " 2508 "allocate memory; dropping connection"); 2509 icl_pdu_free(response); 2510 ctl_set_busy(&io->scsiio); 2511 io->scsiio.be_move_done(io); 2512 cfiscsi_session_terminate(cs); 2513 return; 2514 } 2515 sg_addr += len; 2516 sg_len -= len; 2517 2518 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2519 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2520 buffer_offset, response->ip_data_len, expected_len)); 2521 if (buffer_offset + response->ip_data_len == expected_len) { 2522 /* 2523 * Already have the amount of data the initiator wanted. 2524 */ 2525 break; 2526 } 2527 2528 if (sg_len == 0) { 2529 /* 2530 * End of scatter-gather segment; 2531 * proceed to the next one... 2532 */ 2533 if (i == ctl_sg_count - 1) { 2534 /* 2535 * ... unless this was the last one. 2536 */ 2537 break; 2538 } 2539 i++; 2540 } 2541 2542 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2543 /* 2544 * Can't stuff more data into the current PDU; 2545 * queue it. Note that's not enough to check 2546 * for kern_data_resid == 0 instead; there 2547 * may be several Data-In PDUs for the final 2548 * call to cfiscsi_datamove(), and we want 2549 * to set the F flag only on the last of them. 2550 */ 2551 buffer_offset += response->ip_data_len; 2552 if (buffer_offset == io->scsiio.kern_total_len || 2553 buffer_offset == expected_len) { 2554 buffer_offset -= response->ip_data_len; 2555 break; 2556 } 2557 cfiscsi_pdu_queue(response); 2558 response = NULL; 2559 bhsdi = NULL; 2560 } 2561 } 2562 if (response != NULL) { 2563 buffer_offset += response->ip_data_len; 2564 if (buffer_offset == io->scsiio.kern_total_len || 2565 buffer_offset == expected_len) { 2566 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2567 if (io->io_hdr.status == CTL_SUCCESS) { 2568 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2569 if (PDU_TOTAL_TRANSFER_LEN(request) < 2570 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2571 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2572 bhsdi->bhsdi_residual_count = 2573 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2574 PDU_TOTAL_TRANSFER_LEN(request)); 2575 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2576 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2577 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2578 bhsdi->bhsdi_residual_count = 2579 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2580 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2581 } 2582 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2583 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2584 } 2585 } 2586 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2587 cfiscsi_pdu_queue(response); 2588 } 2589 2590 io->scsiio.be_move_done(io); 2591} 2592 2593static void 2594cfiscsi_datamove_out(union ctl_io *io) 2595{ 2596 struct cfiscsi_session *cs; 2597 struct icl_pdu *request, *response; 2598 const struct iscsi_bhs_scsi_command *bhssc; 2599 struct iscsi_bhs_r2t *bhsr2t; 2600 struct cfiscsi_data_wait *cdw; 2601 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2602 uint32_t expected_len, r2t_off, r2t_len; 2603 uint32_t target_transfer_tag; 2604 bool done; 2605 2606 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2607 cs = PDU_SESSION(request); 2608 2609 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2610 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2611 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2612 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2613 2614 /* 2615 * We need to record it so that we can properly report 2616 * underflow/underflow. 2617 */ 2618 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2619 2620 /* 2621 * Report write underflow as error since CTL and backends don't 2622 * really support it, and SCSI does not tell how to do it right. 2623 */ 2624 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2625 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2626 expected_len) { 2627 io->scsiio.io_hdr.port_status = 43; 2628 io->scsiio.be_move_done(io); 2629 return; 2630 } 2631 2632 target_transfer_tag = 2633 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2634 2635#if 0 2636 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2637 "task tag 0x%x, target transfer tag 0x%x", 2638 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2639#endif 2640 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2641 if (cdw == NULL) { 2642 CFISCSI_SESSION_WARN(cs, "failed to " 2643 "allocate memory; dropping connection"); 2644 ctl_set_busy(&io->scsiio); 2645 io->scsiio.be_move_done(io); 2646 cfiscsi_session_terminate(cs); 2647 return; 2648 } 2649 cdw->cdw_ctl_io = io; 2650 cdw->cdw_target_transfer_tag = target_transfer_tag; 2651 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2652 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2653 2654 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2655 if (io->scsiio.kern_sg_entries > 0) { 2656 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2657 } else { 2658 ctl_sglist = &ctl_sg_entry; 2659 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2660 ctl_sglist->len = io->scsiio.kern_data_len; 2661 } 2662 cdw->cdw_sg_index = 0; 2663 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2664 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2665 r2t_off = io->scsiio.ext_data_filled; 2666 while (r2t_off > 0) { 2667 if (r2t_off >= cdw->cdw_sg_len) { 2668 r2t_off -= cdw->cdw_sg_len; 2669 cdw->cdw_sg_index++; 2670 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2671 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2672 continue; 2673 } 2674 cdw->cdw_sg_addr += r2t_off; 2675 cdw->cdw_sg_len -= r2t_off; 2676 r2t_off = 0; 2677 } 2678 2679 if (cs->cs_immediate_data && 2680 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2681 icl_pdu_data_segment_length(request)) { 2682 done = cfiscsi_handle_data_segment(request, cdw); 2683 if (done) { 2684 uma_zfree(cfiscsi_data_wait_zone, cdw); 2685 io->scsiio.be_move_done(io); 2686 return; 2687 } 2688 } 2689 2690 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2691 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2692 cs->cs_max_burst_length); 2693 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2694 2695 CFISCSI_SESSION_LOCK(cs); 2696 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2697 CFISCSI_SESSION_UNLOCK(cs); 2698 2699 /* 2700 * XXX: We should limit the number of outstanding R2T PDUs 2701 * per task to MaxOutstandingR2T. 2702 */ 2703 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2704 if (response == NULL) { 2705 CFISCSI_SESSION_WARN(cs, "failed to " 2706 "allocate memory; dropping connection"); 2707 ctl_set_busy(&io->scsiio); 2708 io->scsiio.be_move_done(io); 2709 cfiscsi_session_terminate(cs); 2710 return; 2711 } 2712 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2713 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2714 bhsr2t->bhsr2t_flags = 0x80; 2715 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2716 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2717 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2718 /* 2719 * XXX: Here we assume that cfiscsi_datamove() won't ever 2720 * be running concurrently on several CPUs for a given 2721 * command. 2722 */ 2723 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2724 PDU_R2TSN(request)++; 2725 /* 2726 * This is the offset within the current SCSI command; 2727 * i.e. for the first call of datamove(), it will be 0, 2728 * and for subsequent ones it will be the sum of lengths 2729 * of previous ones. 2730 * 2731 * The ext_data_filled is to account for unsolicited 2732 * (immediate) data that might have already arrived. 2733 */ 2734 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2735 /* 2736 * This is the total length (sum of S/G lengths) this call 2737 * to cfiscsi_datamove() is supposed to handle, limited by 2738 * MaxBurstLength. 2739 */ 2740 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2741 cfiscsi_pdu_queue(response); 2742} 2743 2744static void 2745cfiscsi_datamove(union ctl_io *io) 2746{ 2747 2748 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2749 cfiscsi_datamove_in(io); 2750 else { 2751 /* We hadn't received anything during this datamove yet. */ 2752 io->scsiio.ext_data_filled = 0; 2753 cfiscsi_datamove_out(io); 2754 } 2755} 2756 2757static void 2758cfiscsi_scsi_command_done(union ctl_io *io) 2759{ 2760 struct icl_pdu *request, *response; 2761 struct iscsi_bhs_scsi_command *bhssc; 2762 struct iscsi_bhs_scsi_response *bhssr; 2763#ifdef DIAGNOSTIC 2764 struct cfiscsi_data_wait *cdw; 2765#endif 2766 struct cfiscsi_session *cs; 2767 uint16_t sense_length; 2768 2769 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2770 cs = PDU_SESSION(request); 2771 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2772 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2773 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2774 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2775 2776 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2777 // bhssc->bhssc_initiator_task_tag); 2778 2779#ifdef DIAGNOSTIC 2780 CFISCSI_SESSION_LOCK(cs); 2781 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2782 KASSERT(bhssc->bhssc_initiator_task_tag != 2783 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2784 CFISCSI_SESSION_UNLOCK(cs); 2785#endif 2786 2787 /* 2788 * Do not return status for aborted commands. 2789 * There are exceptions, but none supported by CTL yet. 2790 */ 2791 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2792 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2793 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2794 ctl_free_io(io); 2795 icl_pdu_free(request); 2796 return; 2797 } 2798 2799 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2800 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2801 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2802 bhssr->bhssr_flags = 0x80; 2803 /* 2804 * XXX: We don't deal with bidirectional under/overflows; 2805 * does anything actually support those? 2806 */ 2807 if (PDU_TOTAL_TRANSFER_LEN(request) < 2808 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2809 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2810 bhssr->bhssr_residual_count = 2811 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2812 PDU_TOTAL_TRANSFER_LEN(request)); 2813 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2814 // ntohl(bhssr->bhssr_residual_count)); 2815 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2816 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2817 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2818 bhssr->bhssr_residual_count = 2819 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2820 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2821 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2822 // ntohl(bhssr->bhssr_residual_count)); 2823 } 2824 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2825 bhssr->bhssr_status = io->scsiio.scsi_status; 2826 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2827 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2828 2829 if (io->scsiio.sense_len > 0) { 2830#if 0 2831 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2832 io->scsiio.sense_len); 2833#endif 2834 sense_length = htons(io->scsiio.sense_len); 2835 icl_pdu_append_data(response, 2836 &sense_length, sizeof(sense_length), M_WAITOK); 2837 icl_pdu_append_data(response, 2838 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2839 } 2840 2841 ctl_free_io(io); 2842 icl_pdu_free(request); 2843 cfiscsi_pdu_queue(response); 2844} 2845 2846static void 2847cfiscsi_task_management_done(union ctl_io *io) 2848{ 2849 struct icl_pdu *request, *response; 2850 struct iscsi_bhs_task_management_request *bhstmr; 2851 struct iscsi_bhs_task_management_response *bhstmr2; 2852 struct cfiscsi_data_wait *cdw, *tmpcdw; 2853 struct cfiscsi_session *cs; 2854 2855 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2856 cs = PDU_SESSION(request); 2857 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2858 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2859 ISCSI_BHS_OPCODE_TASK_REQUEST, 2860 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2861 2862#if 0 2863 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2864 bhstmr->bhstmr_initiator_task_tag, 2865 bhstmr->bhstmr_referenced_task_tag); 2866#endif 2867 2868 if ((bhstmr->bhstmr_function & ~0x80) == 2869 BHSTMR_FUNCTION_ABORT_TASK) { 2870 /* 2871 * Make sure we no longer wait for Data-Out for this command. 2872 */ 2873 CFISCSI_SESSION_LOCK(cs); 2874 TAILQ_FOREACH_SAFE(cdw, 2875 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2876 if (bhstmr->bhstmr_referenced_task_tag != 2877 cdw->cdw_initiator_task_tag) 2878 continue; 2879 2880#if 0 2881 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2882 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2883#endif 2884 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2885 cdw, cdw_next); 2886 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2887 uma_zfree(cfiscsi_data_wait_zone, cdw); 2888 } 2889 CFISCSI_SESSION_UNLOCK(cs); 2890 } 2891 2892 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2893 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2894 response->ip_bhs; 2895 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2896 bhstmr2->bhstmr_flags = 0x80; 2897 if (io->io_hdr.status == CTL_SUCCESS) { 2898 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2899 } else { 2900 /* 2901 * XXX: How to figure out what exactly went wrong? iSCSI spec 2902 * expects us to provide detailed error, e.g. "Task does 2903 * not exist" or "LUN does not exist". 2904 */ 2905 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2906 bhstmr2->bhstmr_response = 2907 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2908 } 2909 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2910 2911 ctl_free_io(io); 2912 icl_pdu_free(request); 2913 cfiscsi_pdu_queue(response); 2914} 2915 2916static void 2917cfiscsi_done(union ctl_io *io) 2918{ 2919 struct icl_pdu *request; 2920 struct cfiscsi_session *cs; 2921 2922 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2923 ("invalid CTL status %#x", io->io_hdr.status)); 2924 2925 if (io->io_hdr.io_type == CTL_IO_TASK && 2926 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2927 /* 2928 * Implicit task termination has just completed; nothing to do. 2929 */ 2930 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2931 cs->cs_tasks_aborted = true; 2932 refcount_release(&cs->cs_outstanding_ctl_pdus); 2933 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2934 ctl_free_io(io); 2935 return; 2936 } 2937 2938 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2939 cs = PDU_SESSION(request); 2940 refcount_release(&cs->cs_outstanding_ctl_pdus); 2941 2942 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2943 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2944 cfiscsi_scsi_command_done(io); 2945 break; 2946 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2947 cfiscsi_task_management_done(io); 2948 break; 2949 default: 2950 panic("cfiscsi_done called with wrong opcode 0x%x", 2951 request->ip_bhs->bhs_opcode); 2952 } 2953} 2954