ctl_frontend_iscsi.c revision 276613
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 276613 2015-01-03 13:08:08Z 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 276613 2015-01-03 13:08:08Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capability.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; 88TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95static int login_timeout = 60; 96TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99static int maxcmdsn_delta = 256; 100TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105#define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113#define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130#define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145#define PDU_EXPDATASN(X) (X)->ip_prv0 146#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147#define PDU_R2TSN(X) (X)->ip_prv2 148 149int cfiscsi_init(void); 150static void cfiscsi_online(void *arg); 151static void cfiscsi_offline(void *arg); 152static int cfiscsi_info(void *arg, struct sbuf *sb); 153static int cfiscsi_lun_enable(void *arg, 154 struct ctl_id target_id, int lun_id); 155static int cfiscsi_lun_disable(void *arg, 156 struct ctl_id target_id, int lun_id); 157static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 158static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160static void cfiscsi_datamove(union ctl_io *io); 161static void cfiscsi_datamove_in(union ctl_io *io); 162static void cfiscsi_datamove_out(union ctl_io *io); 163static void cfiscsi_done(union ctl_io *io); 164static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 165static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 168static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 169static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 170static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 171static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 172 *softc, const char *name); 173static struct cfiscsi_target *cfiscsi_target_find_or_create( 174 struct cfiscsi_softc *softc, const char *name, const char *alias); 175static void cfiscsi_target_release(struct cfiscsi_target *ct); 176static void cfiscsi_session_delete(struct cfiscsi_session *cs); 177 178static struct cfiscsi_softc cfiscsi_softc; 179extern struct ctl_softc *control_softc; 180 181static struct ctl_frontend cfiscsi_frontend = 182{ 183 .name = "iscsi", 184 .init = cfiscsi_init, 185 .ioctl = cfiscsi_ioctl, 186}; 187CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 188MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 189 190static struct icl_pdu * 191cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 192{ 193 194 return (icl_pdu_new_bhs(request->ip_conn, flags)); 195} 196 197static bool 198cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 199{ 200 const struct iscsi_bhs_scsi_command *bhssc; 201 struct cfiscsi_session *cs; 202 uint32_t cmdsn, expstatsn; 203 204 cs = PDU_SESSION(request); 205 206 /* 207 * Every incoming PDU - not just NOP-Out - resets the ping timer. 208 * The purpose of the timeout is to reset the connection when it stalls; 209 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 210 * in some queue. 211 * 212 * XXX: Locking? 213 */ 214 cs->cs_timeout = 0; 215 216 /* 217 * Data-Out PDUs don't contain CmdSN. 218 */ 219 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 220 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 221 return (false); 222 223 /* 224 * We're only using fields common for all the request 225 * (initiator -> target) PDUs. 226 */ 227 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 228 cmdsn = ntohl(bhssc->bhssc_cmdsn); 229 expstatsn = ntohl(bhssc->bhssc_expstatsn); 230 231 CFISCSI_SESSION_LOCK(cs); 232#if 0 233 if (expstatsn != cs->cs_statsn) { 234 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 235 "while current StatSN is %d", expstatsn, 236 cs->cs_statsn); 237 } 238#endif 239 240 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 241 /* 242 * The target MUST silently ignore any non-immediate command 243 * outside of this range. 244 */ 245 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 246 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 247 CFISCSI_SESSION_UNLOCK(cs); 248 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 249 "while expected %u", cmdsn, cs->cs_cmdsn); 250 return (true); 251 } 252 253 /* 254 * We don't support multiple connections now, so any 255 * discontinuity in CmdSN means lost PDUs. Since we don't 256 * support PDU retransmission -- terminate the connection. 257 */ 258 if (cmdsn != cs->cs_cmdsn) { 259 CFISCSI_SESSION_UNLOCK(cs); 260 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 261 "while expected %u; dropping connection", 262 cmdsn, cs->cs_cmdsn); 263 cfiscsi_session_terminate(cs); 264 return (true); 265 } 266 cs->cs_cmdsn++; 267 } 268 269 CFISCSI_SESSION_UNLOCK(cs); 270 271 return (false); 272} 273 274static void 275cfiscsi_pdu_handle(struct icl_pdu *request) 276{ 277 struct cfiscsi_session *cs; 278 bool ignore; 279 280 cs = PDU_SESSION(request); 281 282 ignore = cfiscsi_pdu_update_cmdsn(request); 283 if (ignore) { 284 icl_pdu_free(request); 285 return; 286 } 287 288 /* 289 * Handle the PDU; this includes e.g. receiving the remaining 290 * part of PDU and submitting the SCSI command to CTL 291 * or queueing a reply. The handling routine is responsible 292 * for freeing the PDU when it's no longer needed. 293 */ 294 switch (request->ip_bhs->bhs_opcode & 295 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 296 case ISCSI_BHS_OPCODE_NOP_OUT: 297 cfiscsi_pdu_handle_nop_out(request); 298 break; 299 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 300 cfiscsi_pdu_handle_scsi_command(request); 301 break; 302 case ISCSI_BHS_OPCODE_TASK_REQUEST: 303 cfiscsi_pdu_handle_task_request(request); 304 break; 305 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 306 cfiscsi_pdu_handle_data_out(request); 307 break; 308 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 309 cfiscsi_pdu_handle_logout_request(request); 310 break; 311 default: 312 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 313 "opcode 0x%x; dropping connection", 314 request->ip_bhs->bhs_opcode); 315 icl_pdu_free(request); 316 cfiscsi_session_terminate(cs); 317 } 318 319} 320 321static void 322cfiscsi_receive_callback(struct icl_pdu *request) 323{ 324 struct cfiscsi_session *cs; 325 326 cs = PDU_SESSION(request); 327 328#ifdef ICL_KERNEL_PROXY 329 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 330 if (cs->cs_login_pdu == NULL) 331 cs->cs_login_pdu = request; 332 else 333 icl_pdu_free(request); 334 cv_signal(&cs->cs_login_cv); 335 return; 336 } 337#endif 338 339 cfiscsi_pdu_handle(request); 340} 341 342static void 343cfiscsi_error_callback(struct icl_conn *ic) 344{ 345 struct cfiscsi_session *cs; 346 347 cs = CONN_SESSION(ic); 348 349 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 350 cfiscsi_session_terminate(cs); 351} 352 353static int 354cfiscsi_pdu_prepare(struct icl_pdu *response) 355{ 356 struct cfiscsi_session *cs; 357 struct iscsi_bhs_scsi_response *bhssr; 358 bool advance_statsn = true; 359 360 cs = PDU_SESSION(response); 361 362 CFISCSI_SESSION_LOCK_ASSERT(cs); 363 364 /* 365 * We're only using fields common for all the response 366 * (target -> initiator) PDUs. 367 */ 368 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 369 370 /* 371 * 10.8.3: "The StatSN for this connection is not advanced 372 * after this PDU is sent." 373 */ 374 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 375 advance_statsn = false; 376 377 /* 378 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 379 * StatSN for the connection is not advanced after this PDU is sent." 380 */ 381 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 382 bhssr->bhssr_initiator_task_tag == 0xffffffff) 383 advance_statsn = false; 384 385 /* 386 * See the comment below - StatSN is not meaningful and must 387 * not be advanced. 388 */ 389 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 390 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 391 advance_statsn = false; 392 393 /* 394 * 10.7.3: "The fields StatSN, Status, and Residual Count 395 * only have meaningful content if the S bit is set to 1." 396 */ 397 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 398 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 399 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 400 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 401 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 402 403 if (advance_statsn) 404 cs->cs_statsn++; 405 406 return (0); 407} 408 409static void 410cfiscsi_pdu_queue(struct icl_pdu *response) 411{ 412 struct cfiscsi_session *cs; 413 414 cs = PDU_SESSION(response); 415 416 CFISCSI_SESSION_LOCK(cs); 417 cfiscsi_pdu_prepare(response); 418 icl_pdu_queue(response); 419 CFISCSI_SESSION_UNLOCK(cs); 420} 421 422static uint32_t 423cfiscsi_decode_lun(uint64_t encoded) 424{ 425 uint8_t lun[8]; 426 uint32_t result; 427 428 /* 429 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 430 * but is in fact an evil, multidimensional structure defined 431 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 432 */ 433 memcpy(lun, &encoded, sizeof(lun)); 434 switch (lun[0] & 0xC0) { 435 case 0x00: 436 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 437 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 438 CFISCSI_WARN("malformed LUN " 439 "(peripheral device addressing method): 0x%jx", 440 (uintmax_t)encoded); 441 result = 0xffffffff; 442 break; 443 } 444 result = lun[1]; 445 break; 446 case 0x40: 447 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 448 lun[6] != 0 || lun[7] != 0) { 449 CFISCSI_WARN("malformed LUN " 450 "(flat address space addressing method): 0x%jx", 451 (uintmax_t)encoded); 452 result = 0xffffffff; 453 break; 454 } 455 result = ((lun[0] & 0x3f) << 8) + lun[1]; 456 break; 457 case 0xC0: 458 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 459 lun[6] != 0 || lun[7] != 0) { 460 CFISCSI_WARN("malformed LUN (extended flat " 461 "address space addressing method): 0x%jx", 462 (uintmax_t)encoded); 463 result = 0xffffffff; 464 break; 465 } 466 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 467 default: 468 CFISCSI_WARN("unsupported LUN format 0x%jx", 469 (uintmax_t)encoded); 470 result = 0xffffffff; 471 break; 472 } 473 474 return (result); 475} 476 477static void 478cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 479{ 480 struct cfiscsi_session *cs; 481 struct iscsi_bhs_nop_out *bhsno; 482 struct iscsi_bhs_nop_in *bhsni; 483 struct icl_pdu *response; 484 void *data = NULL; 485 size_t datasize; 486 int error; 487 488 cs = PDU_SESSION(request); 489 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 490 491 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 492 /* 493 * Nothing to do, iscsi_pdu_update_statsn() already 494 * zeroed the timeout. 495 */ 496 icl_pdu_free(request); 497 return; 498 } 499 500 datasize = icl_pdu_data_segment_length(request); 501 if (datasize > 0) { 502 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 503 if (data == NULL) { 504 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 505 "dropping connection"); 506 icl_pdu_free(request); 507 cfiscsi_session_terminate(cs); 508 return; 509 } 510 icl_pdu_get_data(request, 0, data, datasize); 511 } 512 513 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 514 if (response == NULL) { 515 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 516 "droppping connection"); 517 free(data, M_CFISCSI); 518 icl_pdu_free(request); 519 cfiscsi_session_terminate(cs); 520 return; 521 } 522 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 523 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 524 bhsni->bhsni_flags = 0x80; 525 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 526 bhsni->bhsni_target_transfer_tag = 0xffffffff; 527 if (datasize > 0) { 528 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 529 if (error != 0) { 530 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 531 "dropping connection"); 532 free(data, M_CFISCSI); 533 icl_pdu_free(request); 534 icl_pdu_free(response); 535 cfiscsi_session_terminate(cs); 536 return; 537 } 538 free(data, M_CFISCSI); 539 } 540 541 icl_pdu_free(request); 542 cfiscsi_pdu_queue(response); 543} 544 545static void 546cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 547{ 548 struct iscsi_bhs_scsi_command *bhssc; 549 struct cfiscsi_session *cs; 550 union ctl_io *io; 551 int error; 552 553 cs = PDU_SESSION(request); 554 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 555 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 556 // bhssc->bhssc_initiator_task_tag); 557 558 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 559 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 560 "ImmediateData=No; dropping connection"); 561 icl_pdu_free(request); 562 cfiscsi_session_terminate(cs); 563 return; 564 } 565 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 566 ctl_zero_io(io); 567 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 568 io->io_hdr.io_type = CTL_IO_SCSI; 569 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 570 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 571 io->io_hdr.nexus.targ_target.id = 0; 572 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 573 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 574 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 575 case BHSSC_FLAGS_ATTR_UNTAGGED: 576 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 577 break; 578 case BHSSC_FLAGS_ATTR_SIMPLE: 579 io->scsiio.tag_type = CTL_TAG_SIMPLE; 580 break; 581 case BHSSC_FLAGS_ATTR_ORDERED: 582 io->scsiio.tag_type = CTL_TAG_ORDERED; 583 break; 584 case BHSSC_FLAGS_ATTR_HOQ: 585 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 586 break; 587 case BHSSC_FLAGS_ATTR_ACA: 588 io->scsiio.tag_type = CTL_TAG_ACA; 589 break; 590 default: 591 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 592 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 593 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 594 break; 595 } 596 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 597 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 598 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 599 error = ctl_queue(io); 600 if (error != CTL_RETVAL_COMPLETE) { 601 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 602 "dropping connection", error); 603 ctl_free_io(io); 604 refcount_release(&cs->cs_outstanding_ctl_pdus); 605 icl_pdu_free(request); 606 cfiscsi_session_terminate(cs); 607 } 608} 609 610static void 611cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 612{ 613 struct iscsi_bhs_task_management_request *bhstmr; 614 struct iscsi_bhs_task_management_response *bhstmr2; 615 struct icl_pdu *response; 616 struct cfiscsi_session *cs; 617 union ctl_io *io; 618 int error; 619 620 cs = PDU_SESSION(request); 621 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 622 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 623 ctl_zero_io(io); 624 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 625 io->io_hdr.io_type = CTL_IO_TASK; 626 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 627 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 628 io->io_hdr.nexus.targ_target.id = 0; 629 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 630 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 631 632 switch (bhstmr->bhstmr_function & ~0x80) { 633 case BHSTMR_FUNCTION_ABORT_TASK: 634#if 0 635 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 636#endif 637 io->taskio.task_action = CTL_TASK_ABORT_TASK; 638 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 639 break; 640 case BHSTMR_FUNCTION_ABORT_TASK_SET: 641#if 0 642 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 643#endif 644 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 645 break; 646 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 647#if 0 648 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 649#endif 650 io->taskio.task_action = CTL_TASK_LUN_RESET; 651 break; 652 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 653#if 0 654 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 655#endif 656 io->taskio.task_action = CTL_TASK_TARGET_RESET; 657 break; 658 default: 659 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 660 bhstmr->bhstmr_function & ~0x80); 661 ctl_free_io(io); 662 663 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 664 if (response == NULL) { 665 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 666 "dropping connection"); 667 icl_pdu_free(request); 668 cfiscsi_session_terminate(cs); 669 return; 670 } 671 bhstmr2 = (struct iscsi_bhs_task_management_response *) 672 response->ip_bhs; 673 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 674 bhstmr2->bhstmr_flags = 0x80; 675 bhstmr2->bhstmr_response = 676 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 677 bhstmr2->bhstmr_initiator_task_tag = 678 bhstmr->bhstmr_initiator_task_tag; 679 icl_pdu_free(request); 680 cfiscsi_pdu_queue(response); 681 return; 682 } 683 684 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 685 error = ctl_queue(io); 686 if (error != CTL_RETVAL_COMPLETE) { 687 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 688 "dropping connection", error); 689 ctl_free_io(io); 690 refcount_release(&cs->cs_outstanding_ctl_pdus); 691 icl_pdu_free(request); 692 cfiscsi_session_terminate(cs); 693 } 694} 695 696static bool 697cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 698{ 699 struct iscsi_bhs_data_out *bhsdo; 700 struct cfiscsi_session *cs; 701 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 702 size_t copy_len, len, off, buffer_offset; 703 int ctl_sg_count; 704 union ctl_io *io; 705 706 cs = PDU_SESSION(request); 707 708 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 709 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 710 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 711 ISCSI_BHS_OPCODE_SCSI_COMMAND, 712 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 713 714 /* 715 * We're only using fields common for Data-Out and SCSI Command PDUs. 716 */ 717 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 718 719 io = cdw->cdw_ctl_io; 720 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 721 ("CTL_FLAG_DATA_IN")); 722 723#if 0 724 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 725 request->ip_data_len, io->scsiio.kern_total_len); 726#endif 727 728 if (io->scsiio.kern_sg_entries > 0) { 729 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 730 ctl_sg_count = io->scsiio.kern_sg_entries; 731 } else { 732 ctl_sglist = &ctl_sg_entry; 733 ctl_sglist->addr = io->scsiio.kern_data_ptr; 734 ctl_sglist->len = io->scsiio.kern_data_len; 735 ctl_sg_count = 1; 736 } 737 738 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 739 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 740 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 741 else 742 buffer_offset = 0; 743 len = icl_pdu_data_segment_length(request); 744 745 /* 746 * Make sure the offset, as sent by the initiator, matches the offset 747 * we're supposed to be at in the scatter-gather list. 748 */ 749 if (buffer_offset > 750 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 751 buffer_offset + len <= 752 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 753 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 754 "expected %zd; dropping connection", buffer_offset, 755 (size_t)io->scsiio.kern_rel_offset + 756 (size_t)io->scsiio.ext_data_filled); 757 ctl_set_data_phase_error(&io->scsiio); 758 cfiscsi_session_terminate(cs); 759 return (true); 760 } 761 762 /* 763 * This is the offset within the PDU data segment, as opposed 764 * to buffer_offset, which is the offset within the task (SCSI 765 * command). 766 */ 767 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 768 buffer_offset; 769 770 /* 771 * Iterate over the scatter/gather segments, filling them with data 772 * from the PDU data segment. Note that this can get called multiple 773 * times for one SCSI command; the cdw structure holds state for the 774 * scatter/gather list. 775 */ 776 for (;;) { 777 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 778 ("cdw->cdw_sg_index >= ctl_sg_count")); 779 if (cdw->cdw_sg_len == 0) { 780 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 781 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 782 } 783 KASSERT(off <= len, ("len > off")); 784 copy_len = len - off; 785 if (copy_len > cdw->cdw_sg_len) 786 copy_len = cdw->cdw_sg_len; 787 788 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 789 cdw->cdw_sg_addr += copy_len; 790 cdw->cdw_sg_len -= copy_len; 791 off += copy_len; 792 io->scsiio.ext_data_filled += copy_len; 793 794 if (cdw->cdw_sg_len == 0) { 795 /* 796 * End of current segment. 797 */ 798 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 799 /* 800 * Last segment in scatter/gather list. 801 */ 802 break; 803 } 804 cdw->cdw_sg_index++; 805 } 806 807 if (off == len) { 808 /* 809 * End of PDU payload. 810 */ 811 break; 812 } 813 } 814 815 if (len > off) { 816 /* 817 * In case of unsolicited data, it's possible that the buffer 818 * provided by CTL is smaller than negotiated FirstBurstLength. 819 * Just ignore the superfluous data; will ask for them with R2T 820 * on next call to cfiscsi_datamove(). 821 * 822 * This obviously can only happen with SCSI Command PDU. 823 */ 824 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 825 ISCSI_BHS_OPCODE_SCSI_COMMAND) 826 return (true); 827 828 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 829 "expected %zd; dropping connection", 830 icl_pdu_data_segment_length(request), off); 831 ctl_set_data_phase_error(&io->scsiio); 832 cfiscsi_session_terminate(cs); 833 return (true); 834 } 835 836 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 837 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 838 CFISCSI_SESSION_WARN(cs, "got the final packet without " 839 "the F flag; flags = 0x%x; dropping connection", 840 bhsdo->bhsdo_flags); 841 ctl_set_data_phase_error(&io->scsiio); 842 cfiscsi_session_terminate(cs); 843 return (true); 844 } 845 846 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 847 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 848 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 849 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 850 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 851 "transmitted size was %zd bytes instead of %d; " 852 "dropping connection", 853 (size_t)io->scsiio.ext_data_filled, 854 cdw->cdw_r2t_end); 855 ctl_set_data_phase_error(&io->scsiio); 856 cfiscsi_session_terminate(cs); 857 return (true); 858 } else { 859 /* 860 * For SCSI Command PDU, this just means we need to 861 * solicit more data by sending R2T. 862 */ 863 return (false); 864 } 865 } 866 867 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 868#if 0 869 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 870 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 871#endif 872 873 return (true); 874 } 875 876 return (false); 877} 878 879static void 880cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 881{ 882 struct iscsi_bhs_data_out *bhsdo; 883 struct cfiscsi_session *cs; 884 struct cfiscsi_data_wait *cdw = NULL; 885 union ctl_io *io; 886 bool done; 887 888 cs = PDU_SESSION(request); 889 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 890 891 CFISCSI_SESSION_LOCK(cs); 892 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 893#if 0 894 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 895 "ttt 0x%x, itt 0x%x", 896 bhsdo->bhsdo_target_transfer_tag, 897 bhsdo->bhsdo_initiator_task_tag, 898 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 899#endif 900 if (bhsdo->bhsdo_target_transfer_tag == 901 cdw->cdw_target_transfer_tag) 902 break; 903 } 904 CFISCSI_SESSION_UNLOCK(cs); 905 if (cdw == NULL) { 906 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 907 "0x%x, not found; dropping connection", 908 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 909 icl_pdu_free(request); 910 cfiscsi_session_terminate(cs); 911 return; 912 } 913 914 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 915 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 916 "DataSN %u, while expected %u; dropping connection", 917 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 918 icl_pdu_free(request); 919 cfiscsi_session_terminate(cs); 920 return; 921 } 922 cdw->cdw_datasn++; 923 924 io = cdw->cdw_ctl_io; 925 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 926 ("CTL_FLAG_DATA_IN")); 927 928 done = cfiscsi_handle_data_segment(request, cdw); 929 if (done) { 930 CFISCSI_SESSION_LOCK(cs); 931 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 932 CFISCSI_SESSION_UNLOCK(cs); 933 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 934 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 935 uma_zfree(cfiscsi_data_wait_zone, cdw); 936 if (done) 937 io->scsiio.be_move_done(io); 938 else 939 cfiscsi_datamove_out(io); 940 } 941 942 icl_pdu_free(request); 943} 944 945static void 946cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 947{ 948 struct iscsi_bhs_logout_request *bhslr; 949 struct iscsi_bhs_logout_response *bhslr2; 950 struct icl_pdu *response; 951 struct cfiscsi_session *cs; 952 953 cs = PDU_SESSION(request); 954 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 955 switch (bhslr->bhslr_reason & 0x7f) { 956 case BHSLR_REASON_CLOSE_SESSION: 957 case BHSLR_REASON_CLOSE_CONNECTION: 958 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 959 if (response == NULL) { 960 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 961 icl_pdu_free(request); 962 cfiscsi_session_terminate(cs); 963 return; 964 } 965 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 966 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 967 bhslr2->bhslr_flags = 0x80; 968 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 969 bhslr2->bhslr_initiator_task_tag = 970 bhslr->bhslr_initiator_task_tag; 971 icl_pdu_free(request); 972 cfiscsi_pdu_queue(response); 973 cfiscsi_session_terminate(cs); 974 break; 975 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 976 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 977 if (response == NULL) { 978 CFISCSI_SESSION_WARN(cs, 979 "failed to allocate memory; dropping connection"); 980 icl_pdu_free(request); 981 cfiscsi_session_terminate(cs); 982 return; 983 } 984 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 985 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 986 bhslr2->bhslr_flags = 0x80; 987 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 988 bhslr2->bhslr_initiator_task_tag = 989 bhslr->bhslr_initiator_task_tag; 990 icl_pdu_free(request); 991 cfiscsi_pdu_queue(response); 992 break; 993 default: 994 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 995 bhslr->bhslr_reason); 996 icl_pdu_free(request); 997 cfiscsi_session_terminate(cs); 998 break; 999 } 1000} 1001 1002static void 1003cfiscsi_callout(void *context) 1004{ 1005 struct icl_pdu *cp; 1006 struct iscsi_bhs_nop_in *bhsni; 1007 struct cfiscsi_session *cs; 1008 1009 cs = context; 1010 1011 if (cs->cs_terminating) 1012 return; 1013 1014 callout_schedule(&cs->cs_callout, 1 * hz); 1015 1016 atomic_add_int(&cs->cs_timeout, 1); 1017 1018#ifdef ICL_KERNEL_PROXY 1019 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1020 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1021 CFISCSI_SESSION_WARN(cs, "login timed out after " 1022 "%d seconds; dropping connection", cs->cs_timeout); 1023 cfiscsi_session_terminate(cs); 1024 } 1025 return; 1026 } 1027#endif 1028 1029 if (ping_timeout <= 0) { 1030 /* 1031 * Pings are disabled. Don't send NOP-In in this case; 1032 * user might have disabled pings to work around problems 1033 * with certain initiators that can't properly handle 1034 * NOP-In, such as iPXE. Reset the timeout, to avoid 1035 * triggering reconnection, should the user decide to 1036 * reenable them. 1037 */ 1038 cs->cs_timeout = 0; 1039 return; 1040 } 1041 1042 if (cs->cs_timeout >= ping_timeout) { 1043 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1044 "dropping connection", ping_timeout); 1045 cfiscsi_session_terminate(cs); 1046 return; 1047 } 1048 1049 /* 1050 * If the ping was reset less than one second ago - which means 1051 * that we've received some PDU during the last second - assume 1052 * the traffic flows correctly and don't bother sending a NOP-Out. 1053 * 1054 * (It's 2 - one for one second, and one for incrementing is_timeout 1055 * earlier in this routine.) 1056 */ 1057 if (cs->cs_timeout < 2) 1058 return; 1059 1060 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1061 if (cp == NULL) { 1062 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1063 return; 1064 } 1065 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1066 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1067 bhsni->bhsni_flags = 0x80; 1068 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1069 1070 cfiscsi_pdu_queue(cp); 1071} 1072 1073static void 1074cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1075{ 1076 struct cfiscsi_data_wait *cdw; 1077 union ctl_io *io; 1078 int error, last, wait; 1079 1080 if (cs->cs_target == NULL) 1081 return; /* No target yet, so nothing to do. */ 1082 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1083 ctl_zero_io(io); 1084 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1085 io->io_hdr.io_type = CTL_IO_TASK; 1086 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1087 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1088 io->io_hdr.nexus.targ_target.id = 0; 1089 io->io_hdr.nexus.targ_lun = 0; 1090 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1091 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1092 wait = cs->cs_outstanding_ctl_pdus; 1093 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1094 error = ctl_queue(io); 1095 if (error != CTL_RETVAL_COMPLETE) { 1096 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1097 refcount_release(&cs->cs_outstanding_ctl_pdus); 1098 ctl_free_io(io); 1099 } 1100 1101 CFISCSI_SESSION_LOCK(cs); 1102 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1103 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1104 CFISCSI_SESSION_UNLOCK(cs); 1105 /* 1106 * Set nonzero port status; this prevents backends from 1107 * assuming that the data transfer actually succeeded 1108 * and writing uninitialized data to disk. 1109 */ 1110 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1111 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1112 uma_zfree(cfiscsi_data_wait_zone, cdw); 1113 CFISCSI_SESSION_LOCK(cs); 1114 } 1115 CFISCSI_SESSION_UNLOCK(cs); 1116 1117 /* 1118 * Wait for CTL to terminate all the tasks. 1119 */ 1120 if (wait > 0) 1121 CFISCSI_SESSION_WARN(cs, 1122 "waiting for CTL to terminate %d tasks", wait); 1123 for (;;) { 1124 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1125 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1126 if (last != 0) 1127 break; 1128 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1129 0, "cfiscsi_terminate", hz / 100); 1130 } 1131 if (wait > 0) 1132 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1133} 1134 1135static void 1136cfiscsi_maintenance_thread(void *arg) 1137{ 1138 struct cfiscsi_session *cs; 1139 1140 cs = arg; 1141 1142 for (;;) { 1143 CFISCSI_SESSION_LOCK(cs); 1144 if (cs->cs_terminating == false) 1145 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1146 CFISCSI_SESSION_UNLOCK(cs); 1147 1148 if (cs->cs_terminating) { 1149 1150 /* 1151 * We used to wait up to 30 seconds to deliver queued 1152 * PDUs to the initiator. We also tried hard to deliver 1153 * SCSI Responses for the aborted PDUs. We don't do 1154 * that anymore. We might need to revisit that. 1155 */ 1156 callout_drain(&cs->cs_callout); 1157 icl_conn_close(cs->cs_conn); 1158 1159 /* 1160 * At this point ICL receive thread is no longer 1161 * running; no new tasks can be queued. 1162 */ 1163 cfiscsi_session_terminate_tasks(cs); 1164 cfiscsi_session_delete(cs); 1165 kthread_exit(); 1166 return; 1167 } 1168 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1169 } 1170} 1171 1172static void 1173cfiscsi_session_terminate(struct cfiscsi_session *cs) 1174{ 1175 1176 if (cs->cs_terminating) 1177 return; 1178 cs->cs_terminating = true; 1179 cv_signal(&cs->cs_maintenance_cv); 1180#ifdef ICL_KERNEL_PROXY 1181 cv_signal(&cs->cs_login_cv); 1182#endif 1183} 1184 1185static int 1186cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1187{ 1188 struct cfiscsi_target *ct; 1189 char *name; 1190 int i; 1191 1192 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1193 1194 ct = cs->cs_target; 1195 name = strdup(cs->cs_initiator_id, M_CTL); 1196 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1197 if (i < 0) { 1198 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1199 i); 1200 cs->cs_ctl_initid = -1; 1201 return (1); 1202 } 1203 cs->cs_ctl_initid = i; 1204#if 0 1205 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1206#endif 1207 1208 return (0); 1209} 1210 1211static void 1212cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1213{ 1214 int error; 1215 1216 if (cs->cs_ctl_initid == -1) 1217 return; 1218 1219 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1220 if (error != 0) { 1221 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1222 error); 1223 } 1224 cs->cs_ctl_initid = -1; 1225} 1226 1227static struct cfiscsi_session * 1228cfiscsi_session_new(struct cfiscsi_softc *softc) 1229{ 1230 struct cfiscsi_session *cs; 1231 int error; 1232 1233 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1234 if (cs == NULL) { 1235 CFISCSI_WARN("malloc failed"); 1236 return (NULL); 1237 } 1238 cs->cs_ctl_initid = -1; 1239 1240 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1241 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1242 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1243 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1244#ifdef ICL_KERNEL_PROXY 1245 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1246#endif 1247 1248 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1249 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1250 cs->cs_conn->ic_error = cfiscsi_error_callback; 1251 cs->cs_conn->ic_prv0 = cs; 1252 1253 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1254 if (error != 0) { 1255 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1256 free(cs, M_CFISCSI); 1257 return (NULL); 1258 } 1259 1260 mtx_lock(&softc->lock); 1261 cs->cs_id = ++softc->last_session_id; 1262 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1263 mtx_unlock(&softc->lock); 1264 1265 /* 1266 * Start pinging the initiator. 1267 */ 1268 callout_init(&cs->cs_callout, 1); 1269 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1270 1271 return (cs); 1272} 1273 1274static void 1275cfiscsi_session_delete(struct cfiscsi_session *cs) 1276{ 1277 struct cfiscsi_softc *softc; 1278 1279 softc = &cfiscsi_softc; 1280 1281 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1282 ("destroying session with outstanding CTL pdus")); 1283 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1284 ("destroying session with non-empty queue")); 1285 1286 cfiscsi_session_unregister_initiator(cs); 1287 if (cs->cs_target != NULL) 1288 cfiscsi_target_release(cs->cs_target); 1289 icl_conn_close(cs->cs_conn); 1290 icl_conn_free(cs->cs_conn); 1291 1292 mtx_lock(&softc->lock); 1293 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1294 cv_signal(&softc->sessions_cv); 1295 mtx_unlock(&softc->lock); 1296 1297 free(cs, M_CFISCSI); 1298} 1299 1300int 1301cfiscsi_init(void) 1302{ 1303 struct cfiscsi_softc *softc; 1304 int retval; 1305 1306 softc = &cfiscsi_softc; 1307 retval = 0; 1308 bzero(softc, sizeof(*softc)); 1309 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1310 1311 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1312#ifdef ICL_KERNEL_PROXY 1313 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1314#endif 1315 TAILQ_INIT(&softc->sessions); 1316 TAILQ_INIT(&softc->targets); 1317 1318 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1319 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1320 UMA_ALIGN_PTR, 0); 1321 1322 return (0); 1323} 1324 1325#ifdef ICL_KERNEL_PROXY 1326static void 1327cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1328{ 1329 struct cfiscsi_session *cs; 1330 1331 cs = cfiscsi_session_new(&cfiscsi_softc); 1332 if (cs == NULL) { 1333 CFISCSI_WARN("failed to create session"); 1334 return; 1335 } 1336 1337 icl_conn_handoff_sock(cs->cs_conn, so); 1338 cs->cs_initiator_sa = sa; 1339 cs->cs_portal_id = portal_id; 1340 cs->cs_waiting_for_ctld = true; 1341 cv_signal(&cfiscsi_softc.accept_cv); 1342} 1343#endif 1344 1345static void 1346cfiscsi_online(void *arg) 1347{ 1348 struct cfiscsi_softc *softc; 1349 struct cfiscsi_target *ct; 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 = 1; 1361 online = softc->online++; 1362 mtx_unlock(&softc->lock); 1363 if (online > 0) 1364 return; 1365 1366#ifdef ICL_KERNEL_PROXY 1367 if (softc->listener != NULL) 1368 icl_listen_free(softc->listener); 1369 softc->listener = icl_listen_new(cfiscsi_accept); 1370#endif 1371} 1372 1373static void 1374cfiscsi_offline(void *arg) 1375{ 1376 struct cfiscsi_softc *softc; 1377 struct cfiscsi_target *ct; 1378 struct cfiscsi_session *cs; 1379 int online; 1380 1381 ct = (struct cfiscsi_target *)arg; 1382 softc = ct->ct_softc; 1383 1384 mtx_lock(&softc->lock); 1385 if (!ct->ct_online) { 1386 mtx_unlock(&softc->lock); 1387 return; 1388 } 1389 ct->ct_online = 0; 1390 online = --softc->online; 1391 1392 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1393 if (cs->cs_target == ct) 1394 cfiscsi_session_terminate(cs); 1395 } 1396 do { 1397 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1398 if (cs->cs_target == ct) 1399 break; 1400 } 1401 if (cs != NULL) 1402 cv_wait(&softc->sessions_cv, &softc->lock); 1403 } while (cs != NULL && ct->ct_online == 0); 1404 mtx_unlock(&softc->lock); 1405 if (online > 0) 1406 return; 1407 1408#ifdef ICL_KERNEL_PROXY 1409 icl_listen_free(softc->listener); 1410 softc->listener = NULL; 1411#endif 1412} 1413 1414static int 1415cfiscsi_info(void *arg, struct sbuf *sb) 1416{ 1417 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1418 int retval; 1419 1420 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1421 ct->ct_state); 1422 return (retval); 1423} 1424 1425static void 1426cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1427{ 1428 struct cfiscsi_softc *softc; 1429 struct cfiscsi_session *cs, *cs2; 1430 struct cfiscsi_target *ct; 1431 struct ctl_iscsi_handoff_params *cihp; 1432 int error; 1433 1434 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1435 softc = &cfiscsi_softc; 1436 1437 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1438 cihp->initiator_name, cihp->initiator_addr, 1439 cihp->target_name); 1440 1441 ct = cfiscsi_target_find(softc, cihp->target_name); 1442 if (ct == NULL) { 1443 ci->status = CTL_ISCSI_ERROR; 1444 snprintf(ci->error_str, sizeof(ci->error_str), 1445 "%s: target not found", __func__); 1446 return; 1447 } 1448 1449#ifdef ICL_KERNEL_PROXY 1450 if (cihp->socket > 0 && cihp->connection_id > 0) { 1451 snprintf(ci->error_str, sizeof(ci->error_str), 1452 "both socket and connection_id set"); 1453 ci->status = CTL_ISCSI_ERROR; 1454 cfiscsi_target_release(ct); 1455 return; 1456 } 1457 if (cihp->socket == 0) { 1458 mtx_lock(&cfiscsi_softc.lock); 1459 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1460 if (cs->cs_id == cihp->connection_id) 1461 break; 1462 } 1463 if (cs == NULL) { 1464 mtx_unlock(&cfiscsi_softc.lock); 1465 snprintf(ci->error_str, sizeof(ci->error_str), 1466 "connection not found"); 1467 ci->status = CTL_ISCSI_ERROR; 1468 cfiscsi_target_release(ct); 1469 return; 1470 } 1471 mtx_unlock(&cfiscsi_softc.lock); 1472 } else { 1473#endif 1474 cs = cfiscsi_session_new(softc); 1475 if (cs == NULL) { 1476 ci->status = CTL_ISCSI_ERROR; 1477 snprintf(ci->error_str, sizeof(ci->error_str), 1478 "%s: cfiscsi_session_new failed", __func__); 1479 cfiscsi_target_release(ct); 1480 return; 1481 } 1482#ifdef ICL_KERNEL_PROXY 1483 } 1484#endif 1485 1486 /* 1487 * First PDU of Full Feature phase has the same CmdSN as the last 1488 * PDU from the Login Phase received from the initiator. Thus, 1489 * the -1 below. 1490 */ 1491 cs->cs_portal_group_tag = cihp->portal_group_tag; 1492 cs->cs_cmdsn = cihp->cmdsn; 1493 cs->cs_statsn = cihp->statsn; 1494 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1495 cs->cs_max_burst_length = cihp->max_burst_length; 1496 cs->cs_immediate_data = !!cihp->immediate_data; 1497 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1498 cs->cs_conn->ic_header_crc32c = true; 1499 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1500 cs->cs_conn->ic_data_crc32c = true; 1501 1502 strlcpy(cs->cs_initiator_name, 1503 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1504 strlcpy(cs->cs_initiator_addr, 1505 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1506 strlcpy(cs->cs_initiator_alias, 1507 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1508 memcpy(cs->cs_initiator_isid, 1509 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1510 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1511 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1512 cihp->initiator_isid[0], cihp->initiator_isid[1], 1513 cihp->initiator_isid[2], cihp->initiator_isid[3], 1514 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1515 1516 mtx_lock(&softc->lock); 1517 if (ct->ct_online == 0) { 1518 mtx_unlock(&softc->lock); 1519 cfiscsi_session_terminate(cs); 1520 cfiscsi_target_release(ct); 1521 ci->status = CTL_ISCSI_ERROR; 1522 snprintf(ci->error_str, sizeof(ci->error_str), 1523 "%s: port offline", __func__); 1524 return; 1525 } 1526 cs->cs_target = ct; 1527 mtx_unlock(&softc->lock); 1528 1529 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1530restart: 1531 if (!cs->cs_terminating) { 1532 mtx_lock(&softc->lock); 1533 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1534 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1535 cs->cs_target == cs2->cs_target && 1536 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1537 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1538 cfiscsi_session_terminate(cs2); 1539 mtx_unlock(&softc->lock); 1540 pause("cfiscsi_reinstate", 1); 1541 goto restart; 1542 } 1543 } 1544 mtx_unlock(&softc->lock); 1545 } 1546 1547 /* 1548 * Register initiator with CTL. 1549 */ 1550 cfiscsi_session_register_initiator(cs); 1551 1552#ifdef ICL_KERNEL_PROXY 1553 if (cihp->socket > 0) { 1554#endif 1555 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1556 if (error != 0) { 1557 cfiscsi_session_terminate(cs); 1558 refcount_release(&cs->cs_outstanding_ctl_pdus); 1559 ci->status = CTL_ISCSI_ERROR; 1560 snprintf(ci->error_str, sizeof(ci->error_str), 1561 "%s: icl_conn_handoff failed with error %d", 1562 __func__, error); 1563 return; 1564 } 1565#ifdef ICL_KERNEL_PROXY 1566 } 1567#endif 1568 1569#ifdef ICL_KERNEL_PROXY 1570 cs->cs_login_phase = false; 1571 1572 /* 1573 * First PDU of the Full Feature phase has likely already arrived. 1574 * We have to pick it up and execute properly. 1575 */ 1576 if (cs->cs_login_pdu != NULL) { 1577 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1578 cfiscsi_pdu_handle(cs->cs_login_pdu); 1579 cs->cs_login_pdu = NULL; 1580 } 1581#endif 1582 1583 refcount_release(&cs->cs_outstanding_ctl_pdus); 1584 ci->status = CTL_ISCSI_OK; 1585} 1586 1587static void 1588cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1589{ 1590 struct ctl_iscsi_list_params *cilp; 1591 struct cfiscsi_session *cs; 1592 struct cfiscsi_softc *softc; 1593 struct sbuf *sb; 1594 int error; 1595 1596 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1597 softc = &cfiscsi_softc; 1598 1599 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1600 if (sb == NULL) { 1601 ci->status = CTL_ISCSI_ERROR; 1602 snprintf(ci->error_str, sizeof(ci->error_str), 1603 "Unable to allocate %d bytes for iSCSI session list", 1604 cilp->alloc_len); 1605 return; 1606 } 1607 1608 sbuf_printf(sb, "<ctlislist>\n"); 1609 mtx_lock(&softc->lock); 1610 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1611#ifdef ICL_KERNEL_PROXY 1612 if (cs->cs_target == NULL) 1613 continue; 1614#endif 1615 error = sbuf_printf(sb, "<connection id=\"%d\">" 1616 "<initiator>%s</initiator>" 1617 "<initiator_addr>%s</initiator_addr>" 1618 "<initiator_alias>%s</initiator_alias>" 1619 "<target>%s</target>" 1620 "<target_alias>%s</target_alias>" 1621 "<header_digest>%s</header_digest>" 1622 "<data_digest>%s</data_digest>" 1623 "<max_data_segment_length>%zd</max_data_segment_length>" 1624 "<immediate_data>%d</immediate_data>" 1625 "<iser>%d</iser>" 1626 "</connection>\n", 1627 cs->cs_id, 1628 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1629 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1630 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1631 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1632 cs->cs_max_data_segment_length, 1633 cs->cs_immediate_data, 1634 cs->cs_conn->ic_iser); 1635 if (error != 0) 1636 break; 1637 } 1638 mtx_unlock(&softc->lock); 1639 error = sbuf_printf(sb, "</ctlislist>\n"); 1640 if (error != 0) { 1641 sbuf_delete(sb); 1642 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1643 snprintf(ci->error_str, sizeof(ci->error_str), 1644 "Out of space, %d bytes is too small", cilp->alloc_len); 1645 return; 1646 } 1647 sbuf_finish(sb); 1648 1649 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1650 cilp->fill_len = sbuf_len(sb) + 1; 1651 ci->status = CTL_ISCSI_OK; 1652 sbuf_delete(sb); 1653} 1654 1655static void 1656cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1657{ 1658 struct icl_pdu *response; 1659 struct iscsi_bhs_asynchronous_message *bhsam; 1660 struct ctl_iscsi_terminate_params *citp; 1661 struct cfiscsi_session *cs; 1662 struct cfiscsi_softc *softc; 1663 int found = 0; 1664 1665 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1666 softc = &cfiscsi_softc; 1667 1668 mtx_lock(&softc->lock); 1669 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1670 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1671 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1672 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1673 continue; 1674 1675 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1676 if (response == NULL) { 1677 /* 1678 * Oh well. Just terminate the connection. 1679 */ 1680 } else { 1681 bhsam = (struct iscsi_bhs_asynchronous_message *) 1682 response->ip_bhs; 1683 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1684 bhsam->bhsam_flags = 0x80; 1685 bhsam->bhsam_0xffffffff = 0xffffffff; 1686 bhsam->bhsam_async_event = 1687 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1688 cfiscsi_pdu_queue(response); 1689 } 1690 cfiscsi_session_terminate(cs); 1691 found++; 1692 } 1693 mtx_unlock(&softc->lock); 1694 1695 if (found == 0) { 1696 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1697 snprintf(ci->error_str, sizeof(ci->error_str), 1698 "No matching connections found"); 1699 return; 1700 } 1701 1702 ci->status = CTL_ISCSI_OK; 1703} 1704 1705static void 1706cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1707{ 1708 struct icl_pdu *response; 1709 struct iscsi_bhs_asynchronous_message *bhsam; 1710 struct ctl_iscsi_logout_params *cilp; 1711 struct cfiscsi_session *cs; 1712 struct cfiscsi_softc *softc; 1713 int found = 0; 1714 1715 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1716 softc = &cfiscsi_softc; 1717 1718 mtx_lock(&softc->lock); 1719 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1720 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1721 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1722 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1723 continue; 1724 1725 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1726 if (response == NULL) { 1727 ci->status = CTL_ISCSI_ERROR; 1728 snprintf(ci->error_str, sizeof(ci->error_str), 1729 "Unable to allocate memory"); 1730 mtx_unlock(&softc->lock); 1731 return; 1732 } 1733 bhsam = 1734 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1735 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1736 bhsam->bhsam_flags = 0x80; 1737 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1738 bhsam->bhsam_parameter3 = htons(10); 1739 cfiscsi_pdu_queue(response); 1740 found++; 1741 } 1742 mtx_unlock(&softc->lock); 1743 1744 if (found == 0) { 1745 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1746 snprintf(ci->error_str, sizeof(ci->error_str), 1747 "No matching connections found"); 1748 return; 1749 } 1750 1751 ci->status = CTL_ISCSI_OK; 1752} 1753 1754#ifdef ICL_KERNEL_PROXY 1755static void 1756cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1757{ 1758 struct ctl_iscsi_listen_params *cilp; 1759 struct sockaddr *sa; 1760 int error; 1761 1762 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1763 1764 if (cfiscsi_softc.listener == NULL) { 1765 CFISCSI_DEBUG("no listener"); 1766 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1767 ci->status = CTL_ISCSI_ERROR; 1768 return; 1769 } 1770 1771 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1772 if (error != 0) { 1773 CFISCSI_DEBUG("getsockaddr, error %d", error); 1774 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1775 ci->status = CTL_ISCSI_ERROR; 1776 return; 1777 } 1778 1779 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1780 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1781 if (error != 0) { 1782 free(sa, M_SONAME); 1783 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1784 snprintf(ci->error_str, sizeof(ci->error_str), 1785 "icl_listen_add failed, error %d", error); 1786 ci->status = CTL_ISCSI_ERROR; 1787 return; 1788 } 1789 1790 ci->status = CTL_ISCSI_OK; 1791} 1792 1793static void 1794cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1795{ 1796 struct ctl_iscsi_accept_params *ciap; 1797 struct cfiscsi_session *cs; 1798 int error; 1799 1800 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1801 1802 mtx_lock(&cfiscsi_softc.lock); 1803 for (;;) { 1804 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1805 if (cs->cs_waiting_for_ctld) 1806 break; 1807 } 1808 if (cs != NULL) 1809 break; 1810 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1811 if (error != 0) { 1812 mtx_unlock(&cfiscsi_softc.lock); 1813 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1814 ci->status = CTL_ISCSI_ERROR; 1815 return; 1816 } 1817 } 1818 mtx_unlock(&cfiscsi_softc.lock); 1819 1820 cs->cs_waiting_for_ctld = false; 1821 cs->cs_login_phase = true; 1822 1823 ciap->connection_id = cs->cs_id; 1824 ciap->portal_id = cs->cs_portal_id; 1825 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1826 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1827 cs->cs_initiator_sa->sa_len); 1828 if (error != 0) { 1829 snprintf(ci->error_str, sizeof(ci->error_str), 1830 "copyout failed with error %d", error); 1831 ci->status = CTL_ISCSI_ERROR; 1832 return; 1833 } 1834 1835 ci->status = CTL_ISCSI_OK; 1836} 1837 1838static void 1839cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1840{ 1841 struct ctl_iscsi_send_params *cisp; 1842 struct cfiscsi_session *cs; 1843 struct icl_pdu *ip; 1844 size_t datalen; 1845 void *data; 1846 int error; 1847 1848 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1849 1850 mtx_lock(&cfiscsi_softc.lock); 1851 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1852 if (cs->cs_id == cisp->connection_id) 1853 break; 1854 } 1855 if (cs == NULL) { 1856 mtx_unlock(&cfiscsi_softc.lock); 1857 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1858 ci->status = CTL_ISCSI_ERROR; 1859 return; 1860 } 1861 mtx_unlock(&cfiscsi_softc.lock); 1862 1863#if 0 1864 if (cs->cs_login_phase == false) 1865 return (EBUSY); 1866#endif 1867 1868 if (cs->cs_terminating) { 1869 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1870 ci->status = CTL_ISCSI_ERROR; 1871 return; 1872 } 1873 1874 datalen = cisp->data_segment_len; 1875 /* 1876 * XXX 1877 */ 1878 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1879 if (datalen > 65535) { 1880 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1881 ci->status = CTL_ISCSI_ERROR; 1882 return; 1883 } 1884 if (datalen > 0) { 1885 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1886 error = copyin(cisp->data_segment, data, datalen); 1887 if (error != 0) { 1888 free(data, M_CFISCSI); 1889 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1890 ci->status = CTL_ISCSI_ERROR; 1891 return; 1892 } 1893 } 1894 1895 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1896 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1897 if (datalen > 0) { 1898 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1899 free(data, M_CFISCSI); 1900 } 1901 CFISCSI_SESSION_LOCK(cs); 1902 icl_pdu_queue(ip); 1903 CFISCSI_SESSION_UNLOCK(cs); 1904 ci->status = CTL_ISCSI_OK; 1905} 1906 1907static void 1908cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1909{ 1910 struct ctl_iscsi_receive_params *cirp; 1911 struct cfiscsi_session *cs; 1912 struct icl_pdu *ip; 1913 void *data; 1914 int error; 1915 1916 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1917 1918 mtx_lock(&cfiscsi_softc.lock); 1919 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1920 if (cs->cs_id == cirp->connection_id) 1921 break; 1922 } 1923 if (cs == NULL) { 1924 mtx_unlock(&cfiscsi_softc.lock); 1925 snprintf(ci->error_str, sizeof(ci->error_str), 1926 "connection not found"); 1927 ci->status = CTL_ISCSI_ERROR; 1928 return; 1929 } 1930 mtx_unlock(&cfiscsi_softc.lock); 1931 1932#if 0 1933 if (is->is_login_phase == false) 1934 return (EBUSY); 1935#endif 1936 1937 CFISCSI_SESSION_LOCK(cs); 1938 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1939 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1940 if (error != 0) { 1941 CFISCSI_SESSION_UNLOCK(cs); 1942 snprintf(ci->error_str, sizeof(ci->error_str), 1943 "interrupted by signal"); 1944 ci->status = CTL_ISCSI_ERROR; 1945 return; 1946 } 1947 } 1948 1949 if (cs->cs_terminating) { 1950 CFISCSI_SESSION_UNLOCK(cs); 1951 snprintf(ci->error_str, sizeof(ci->error_str), 1952 "connection terminating"); 1953 ci->status = CTL_ISCSI_ERROR; 1954 return; 1955 } 1956 ip = cs->cs_login_pdu; 1957 cs->cs_login_pdu = NULL; 1958 CFISCSI_SESSION_UNLOCK(cs); 1959 1960 if (ip->ip_data_len > cirp->data_segment_len) { 1961 icl_pdu_free(ip); 1962 snprintf(ci->error_str, sizeof(ci->error_str), 1963 "data segment too big"); 1964 ci->status = CTL_ISCSI_ERROR; 1965 return; 1966 } 1967 1968 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1969 if (ip->ip_data_len > 0) { 1970 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1971 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1972 copyout(data, cirp->data_segment, ip->ip_data_len); 1973 free(data, M_CFISCSI); 1974 } 1975 1976 icl_pdu_free(ip); 1977 ci->status = CTL_ISCSI_OK; 1978} 1979 1980#endif /* !ICL_KERNEL_PROXY */ 1981 1982static void 1983cfiscsi_ioctl_port_create(struct ctl_req *req) 1984{ 1985 struct cfiscsi_target *ct; 1986 struct ctl_port *port; 1987 const char *target, *alias, *tag; 1988 struct scsi_vpd_id_descriptor *desc; 1989 ctl_options_t opts; 1990 int retval, len, idlen; 1991 1992 ctl_init_opts(&opts, req->num_args, req->kern_args); 1993 target = ctl_get_opt(&opts, "cfiscsi_target"); 1994 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1995 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1996 if (target == NULL || tag == NULL) { 1997 req->status = CTL_LUN_ERROR; 1998 snprintf(req->error_str, sizeof(req->error_str), 1999 "Missing required argument"); 2000 ctl_free_opts(&opts); 2001 return; 2002 } 2003 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 2004 if (ct == NULL) { 2005 req->status = CTL_LUN_ERROR; 2006 snprintf(req->error_str, sizeof(req->error_str), 2007 "failed to create target \"%s\"", target); 2008 ctl_free_opts(&opts); 2009 return; 2010 } 2011 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2012 req->status = CTL_LUN_ERROR; 2013 snprintf(req->error_str, sizeof(req->error_str), 2014 "target \"%s\" already exists", target); 2015 cfiscsi_target_release(ct); 2016 ctl_free_opts(&opts); 2017 return; 2018 } 2019 port = &ct->ct_port; 2020 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2021 goto done; 2022 2023 port->frontend = &cfiscsi_frontend; 2024 port->port_type = CTL_PORT_ISCSI; 2025 /* XXX KDM what should the real number be here? */ 2026 port->num_requested_ctl_io = 4096; 2027 port->port_name = "iscsi"; 2028 port->physical_port = strtoul(tag, NULL, 0); 2029 port->virtual_port = ct->ct_target_id; 2030 port->port_online = cfiscsi_online; 2031 port->port_offline = cfiscsi_offline; 2032 port->port_info = cfiscsi_info; 2033 port->onoff_arg = ct; 2034 port->lun_enable = cfiscsi_lun_enable; 2035 port->lun_disable = cfiscsi_lun_disable; 2036 port->lun_map = cfiscsi_lun_map; 2037 port->targ_lun_arg = ct; 2038 port->fe_datamove = cfiscsi_datamove; 2039 port->fe_done = cfiscsi_done; 2040 2041 /* XXX KDM what should we report here? */ 2042 /* XXX These should probably be fetched from CTL. */ 2043 port->max_targets = 1; 2044 port->max_target_id = 15; 2045 2046 port->options = opts; 2047 STAILQ_INIT(&opts); 2048 2049 /* Generate Port ID. */ 2050 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2051 idlen = roundup2(idlen, 4); 2052 len = sizeof(struct scsi_vpd_device_id) + idlen; 2053 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2054 M_CTL, M_WAITOK | M_ZERO); 2055 port->port_devid->len = len; 2056 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2057 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2058 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2059 SVPD_ID_TYPE_SCSI_NAME; 2060 desc->length = idlen; 2061 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2062 target, port->physical_port); 2063 2064 /* Generate Target ID. */ 2065 idlen = strlen(target) + 1; 2066 idlen = roundup2(idlen, 4); 2067 len = sizeof(struct scsi_vpd_device_id) + idlen; 2068 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2069 M_CTL, M_WAITOK | M_ZERO); 2070 port->target_devid->len = len; 2071 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2072 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2073 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2074 SVPD_ID_TYPE_SCSI_NAME; 2075 desc->length = idlen; 2076 strlcpy(desc->identifier, target, idlen); 2077 2078 retval = ctl_port_register(port); 2079 if (retval != 0) { 2080 ctl_free_opts(&port->options); 2081 cfiscsi_target_release(ct); 2082 free(port->port_devid, M_CFISCSI); 2083 free(port->target_devid, M_CFISCSI); 2084 req->status = CTL_LUN_ERROR; 2085 snprintf(req->error_str, sizeof(req->error_str), 2086 "ctl_frontend_register() failed with error %d", retval); 2087 return; 2088 } 2089done: 2090 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2091 req->status = CTL_LUN_OK; 2092 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2093 sizeof(port->targ_port)); //XXX 2094} 2095 2096static void 2097cfiscsi_ioctl_port_remove(struct ctl_req *req) 2098{ 2099 struct cfiscsi_target *ct; 2100 const char *target; 2101 ctl_options_t opts; 2102 2103 ctl_init_opts(&opts, req->num_args, req->kern_args); 2104 target = ctl_get_opt(&opts, "cfiscsi_target"); 2105 if (target == NULL) { 2106 ctl_free_opts(&opts); 2107 req->status = CTL_LUN_ERROR; 2108 snprintf(req->error_str, sizeof(req->error_str), 2109 "Missing required argument"); 2110 return; 2111 } 2112 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2113 if (ct == NULL) { 2114 ctl_free_opts(&opts); 2115 req->status = CTL_LUN_ERROR; 2116 snprintf(req->error_str, sizeof(req->error_str), 2117 "can't find target \"%s\"", target); 2118 return; 2119 } 2120 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2121 ctl_free_opts(&opts); 2122 req->status = CTL_LUN_ERROR; 2123 snprintf(req->error_str, sizeof(req->error_str), 2124 "target \"%s\" is already dying", target); 2125 return; 2126 } 2127 ctl_free_opts(&opts); 2128 2129 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2130 ctl_port_offline(&ct->ct_port); 2131 cfiscsi_target_release(ct); 2132 cfiscsi_target_release(ct); 2133} 2134 2135static int 2136cfiscsi_ioctl(struct cdev *dev, 2137 u_long cmd, caddr_t addr, int flag, struct thread *td) 2138{ 2139 struct ctl_iscsi *ci; 2140 struct ctl_req *req; 2141 2142 if (cmd == CTL_PORT_REQ) { 2143 req = (struct ctl_req *)addr; 2144 switch (req->reqtype) { 2145 case CTL_REQ_CREATE: 2146 cfiscsi_ioctl_port_create(req); 2147 break; 2148 case CTL_REQ_REMOVE: 2149 cfiscsi_ioctl_port_remove(req); 2150 break; 2151 default: 2152 req->status = CTL_LUN_ERROR; 2153 snprintf(req->error_str, sizeof(req->error_str), 2154 "Unsupported request type %d", req->reqtype); 2155 } 2156 return (0); 2157 } 2158 2159 if (cmd != CTL_ISCSI) 2160 return (ENOTTY); 2161 2162 ci = (struct ctl_iscsi *)addr; 2163 switch (ci->type) { 2164 case CTL_ISCSI_HANDOFF: 2165 cfiscsi_ioctl_handoff(ci); 2166 break; 2167 case CTL_ISCSI_LIST: 2168 cfiscsi_ioctl_list(ci); 2169 break; 2170 case CTL_ISCSI_TERMINATE: 2171 cfiscsi_ioctl_terminate(ci); 2172 break; 2173 case CTL_ISCSI_LOGOUT: 2174 cfiscsi_ioctl_logout(ci); 2175 break; 2176#ifdef ICL_KERNEL_PROXY 2177 case CTL_ISCSI_LISTEN: 2178 cfiscsi_ioctl_listen(ci); 2179 break; 2180 case CTL_ISCSI_ACCEPT: 2181 cfiscsi_ioctl_accept(ci); 2182 break; 2183 case CTL_ISCSI_SEND: 2184 cfiscsi_ioctl_send(ci); 2185 break; 2186 case CTL_ISCSI_RECEIVE: 2187 cfiscsi_ioctl_receive(ci); 2188 break; 2189#else 2190 case CTL_ISCSI_LISTEN: 2191 case CTL_ISCSI_ACCEPT: 2192 case CTL_ISCSI_SEND: 2193 case CTL_ISCSI_RECEIVE: 2194 ci->status = CTL_ISCSI_ERROR; 2195 snprintf(ci->error_str, sizeof(ci->error_str), 2196 "%s: CTL compiled without ICL_KERNEL_PROXY", 2197 __func__); 2198 break; 2199#endif /* !ICL_KERNEL_PROXY */ 2200 default: 2201 ci->status = CTL_ISCSI_ERROR; 2202 snprintf(ci->error_str, sizeof(ci->error_str), 2203 "%s: invalid iSCSI request type %d", __func__, ci->type); 2204 break; 2205 } 2206 2207 return (0); 2208} 2209 2210static void 2211cfiscsi_target_hold(struct cfiscsi_target *ct) 2212{ 2213 2214 refcount_acquire(&ct->ct_refcount); 2215} 2216 2217static void 2218cfiscsi_target_release(struct cfiscsi_target *ct) 2219{ 2220 struct cfiscsi_softc *softc; 2221 2222 softc = ct->ct_softc; 2223 mtx_lock(&softc->lock); 2224 if (refcount_release(&ct->ct_refcount)) { 2225 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2226 mtx_unlock(&softc->lock); 2227 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2228 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2229 if (ctl_port_deregister(&ct->ct_port) != 0) 2230 printf("%s: ctl_port_deregister() failed\n", 2231 __func__); 2232 } 2233 free(ct, M_CFISCSI); 2234 2235 return; 2236 } 2237 mtx_unlock(&softc->lock); 2238} 2239 2240static struct cfiscsi_target * 2241cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2242{ 2243 struct cfiscsi_target *ct; 2244 2245 mtx_lock(&softc->lock); 2246 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2247 if (strcmp(name, ct->ct_name) != 0 || 2248 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2249 continue; 2250 cfiscsi_target_hold(ct); 2251 mtx_unlock(&softc->lock); 2252 return (ct); 2253 } 2254 mtx_unlock(&softc->lock); 2255 2256 return (NULL); 2257} 2258 2259static struct cfiscsi_target * 2260cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2261 const char *alias) 2262{ 2263 struct cfiscsi_target *ct, *newct; 2264 int i; 2265 2266 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2267 return (NULL); 2268 2269 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2270 2271 mtx_lock(&softc->lock); 2272 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2273 if (strcmp(name, ct->ct_name) != 0 || 2274 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2275 continue; 2276 cfiscsi_target_hold(ct); 2277 mtx_unlock(&softc->lock); 2278 free(newct, M_CFISCSI); 2279 return (ct); 2280 } 2281 2282 for (i = 0; i < CTL_MAX_LUNS; i++) 2283 newct->ct_luns[i] = UINT32_MAX; 2284 2285 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2286 if (alias != NULL) 2287 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2288 refcount_init(&newct->ct_refcount, 1); 2289 newct->ct_softc = softc; 2290 if (TAILQ_EMPTY(&softc->targets)) 2291 softc->last_target_id = 0; 2292 newct->ct_target_id = ++softc->last_target_id; 2293 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2294 mtx_unlock(&softc->lock); 2295 2296 return (newct); 2297} 2298 2299/* 2300 * Takes LUN from the target space and returns LUN from the CTL space. 2301 */ 2302static uint32_t 2303cfiscsi_lun_map(void *arg, uint32_t lun) 2304{ 2305 struct cfiscsi_target *ct = arg; 2306 2307 if (lun >= CTL_MAX_LUNS) { 2308 CFISCSI_DEBUG("requested lun number %d is higher " 2309 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2310 return (UINT32_MAX); 2311 } 2312 return (ct->ct_luns[lun]); 2313} 2314 2315static int 2316cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2317 unsigned long lun_id, unsigned long ctl_lun_id) 2318{ 2319 2320 if (lun_id >= CTL_MAX_LUNS) { 2321 CFISCSI_WARN("requested lun number %ld is higher " 2322 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2323 return (-1); 2324 } 2325 2326 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2327 /* 2328 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2329 * when the LUN is created, and a second time just before 2330 * the port is brought online; don't emit warnings 2331 * for that case. 2332 */ 2333 if (ct->ct_luns[lun_id] == ctl_lun_id) 2334 return (0); 2335 CFISCSI_WARN("lun %ld already allocated", lun_id); 2336 return (-1); 2337 } 2338 2339#if 0 2340 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2341 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2342#endif 2343 2344 ct->ct_luns[lun_id] = ctl_lun_id; 2345 2346 return (0); 2347} 2348 2349static int 2350cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2351{ 2352 struct cfiscsi_softc *softc; 2353 struct cfiscsi_target *ct; 2354 const char *target = NULL; 2355 const char *lun = NULL; 2356 unsigned long tmp; 2357 2358 ct = (struct cfiscsi_target *)arg; 2359 softc = ct->ct_softc; 2360 2361 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2362 "cfiscsi_target"); 2363 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2364 "cfiscsi_lun"); 2365 2366 if (target == NULL && lun == NULL) 2367 return (0); 2368 2369 if (target == NULL || lun == NULL) { 2370 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2371 "cfiscsi_lun, or the other way around; ignoring"); 2372 return (0); 2373 } 2374 2375 if (strcmp(target, ct->ct_name) != 0) 2376 return (0); 2377 2378 tmp = strtoul(lun, NULL, 10); 2379 cfiscsi_target_set_lun(ct, tmp, lun_id); 2380 return (0); 2381} 2382 2383static int 2384cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2385{ 2386 struct cfiscsi_softc *softc; 2387 struct cfiscsi_target *ct; 2388 int i; 2389 2390 ct = (struct cfiscsi_target *)arg; 2391 softc = ct->ct_softc; 2392 2393 mtx_lock(&softc->lock); 2394 for (i = 0; i < CTL_MAX_LUNS; i++) { 2395 if (ct->ct_luns[i] != lun_id) 2396 continue; 2397 ct->ct_luns[i] = UINT32_MAX; 2398 break; 2399 } 2400 mtx_unlock(&softc->lock); 2401 return (0); 2402} 2403 2404static void 2405cfiscsi_datamove_in(union ctl_io *io) 2406{ 2407 struct cfiscsi_session *cs; 2408 struct icl_pdu *request, *response; 2409 const struct iscsi_bhs_scsi_command *bhssc; 2410 struct iscsi_bhs_data_in *bhsdi; 2411 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2412 size_t len, expected_len, sg_len, buffer_offset; 2413 const char *sg_addr; 2414 int ctl_sg_count, error, i; 2415 2416 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2417 cs = PDU_SESSION(request); 2418 2419 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2420 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2421 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2422 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2423 2424 if (io->scsiio.kern_sg_entries > 0) { 2425 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2426 ctl_sg_count = io->scsiio.kern_sg_entries; 2427 } else { 2428 ctl_sglist = &ctl_sg_entry; 2429 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2430 ctl_sglist->len = io->scsiio.kern_data_len; 2431 ctl_sg_count = 1; 2432 } 2433 2434 /* 2435 * This is the total amount of data to be transferred within the current 2436 * SCSI command. We need to record it so that we can properly report 2437 * underflow/underflow. 2438 */ 2439 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2440 2441 /* 2442 * This is the offset within the current SCSI command; for the first 2443 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2444 * it will be the sum of lengths of previous ones. 2445 */ 2446 buffer_offset = io->scsiio.kern_rel_offset; 2447 2448 /* 2449 * This is the transfer length expected by the initiator. In theory, 2450 * it could be different from the correct amount of data from the SCSI 2451 * point of view, even if that doesn't make any sense. 2452 */ 2453 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2454#if 0 2455 if (expected_len != io->scsiio.kern_total_len) { 2456 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2457 "actual length %zd", expected_len, 2458 (size_t)io->scsiio.kern_total_len); 2459 } 2460#endif 2461 2462 if (buffer_offset >= expected_len) { 2463#if 0 2464 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2465 "already sent the expected len", buffer_offset); 2466#endif 2467 io->scsiio.be_move_done(io); 2468 return; 2469 } 2470 2471 i = 0; 2472 sg_addr = NULL; 2473 sg_len = 0; 2474 response = NULL; 2475 bhsdi = NULL; 2476 for (;;) { 2477 if (response == NULL) { 2478 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2479 if (response == NULL) { 2480 CFISCSI_SESSION_WARN(cs, "failed to " 2481 "allocate memory; dropping connection"); 2482 ctl_set_busy(&io->scsiio); 2483 io->scsiio.be_move_done(io); 2484 cfiscsi_session_terminate(cs); 2485 return; 2486 } 2487 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2488 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2489 bhsdi->bhsdi_initiator_task_tag = 2490 bhssc->bhssc_initiator_task_tag; 2491 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2492 PDU_EXPDATASN(request)++; 2493 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2494 } 2495 2496 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2497 if (sg_len == 0) { 2498 sg_addr = ctl_sglist[i].addr; 2499 sg_len = ctl_sglist[i].len; 2500 KASSERT(sg_len > 0, ("sg_len <= 0")); 2501 } 2502 2503 len = sg_len; 2504 2505 /* 2506 * Truncate to maximum data segment length. 2507 */ 2508 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2509 ("ip_data_len %zd >= max_data_segment_length %zd", 2510 response->ip_data_len, cs->cs_max_data_segment_length)); 2511 if (response->ip_data_len + len > 2512 cs->cs_max_data_segment_length) { 2513 len = cs->cs_max_data_segment_length - 2514 response->ip_data_len; 2515 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2516 len, sg_len)); 2517 } 2518 2519 /* 2520 * Truncate to expected data transfer length. 2521 */ 2522 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2523 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2524 buffer_offset, response->ip_data_len, expected_len)); 2525 if (buffer_offset + response->ip_data_len + len > expected_len) { 2526 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2527 "to expected data transfer length %zd", 2528 buffer_offset + response->ip_data_len + len, expected_len); 2529 len = expected_len - (buffer_offset + response->ip_data_len); 2530 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2531 len, sg_len)); 2532 } 2533 2534 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2535 if (error != 0) { 2536 CFISCSI_SESSION_WARN(cs, "failed to " 2537 "allocate memory; dropping connection"); 2538 icl_pdu_free(response); 2539 ctl_set_busy(&io->scsiio); 2540 io->scsiio.be_move_done(io); 2541 cfiscsi_session_terminate(cs); 2542 return; 2543 } 2544 sg_addr += len; 2545 sg_len -= len; 2546 2547 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2548 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2549 buffer_offset, response->ip_data_len, expected_len)); 2550 if (buffer_offset + response->ip_data_len == expected_len) { 2551 /* 2552 * Already have the amount of data the initiator wanted. 2553 */ 2554 break; 2555 } 2556 2557 if (sg_len == 0) { 2558 /* 2559 * End of scatter-gather segment; 2560 * proceed to the next one... 2561 */ 2562 if (i == ctl_sg_count - 1) { 2563 /* 2564 * ... unless this was the last one. 2565 */ 2566 break; 2567 } 2568 i++; 2569 } 2570 2571 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2572 /* 2573 * Can't stuff more data into the current PDU; 2574 * queue it. Note that's not enough to check 2575 * for kern_data_resid == 0 instead; there 2576 * may be several Data-In PDUs for the final 2577 * call to cfiscsi_datamove(), and we want 2578 * to set the F flag only on the last of them. 2579 */ 2580 buffer_offset += response->ip_data_len; 2581 if (buffer_offset == io->scsiio.kern_total_len || 2582 buffer_offset == expected_len) { 2583 buffer_offset -= response->ip_data_len; 2584 break; 2585 } 2586 cfiscsi_pdu_queue(response); 2587 response = NULL; 2588 bhsdi = NULL; 2589 } 2590 } 2591 if (response != NULL) { 2592 buffer_offset += response->ip_data_len; 2593 if (buffer_offset == io->scsiio.kern_total_len || 2594 buffer_offset == expected_len) { 2595 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2596 if (io->io_hdr.status == CTL_SUCCESS) { 2597 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2598 if (PDU_TOTAL_TRANSFER_LEN(request) < 2599 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2600 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2601 bhsdi->bhsdi_residual_count = 2602 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2603 PDU_TOTAL_TRANSFER_LEN(request)); 2604 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2605 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2606 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2607 bhsdi->bhsdi_residual_count = 2608 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2609 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2610 } 2611 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2612 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2613 } 2614 } 2615 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2616 cfiscsi_pdu_queue(response); 2617 } 2618 2619 io->scsiio.be_move_done(io); 2620} 2621 2622static void 2623cfiscsi_datamove_out(union ctl_io *io) 2624{ 2625 struct cfiscsi_session *cs; 2626 struct icl_pdu *request, *response; 2627 const struct iscsi_bhs_scsi_command *bhssc; 2628 struct iscsi_bhs_r2t *bhsr2t; 2629 struct cfiscsi_data_wait *cdw; 2630 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2631 uint32_t expected_len, r2t_off, r2t_len; 2632 uint32_t target_transfer_tag; 2633 bool done; 2634 2635 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2636 cs = PDU_SESSION(request); 2637 2638 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2639 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2640 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2641 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2642 2643 /* 2644 * We need to record it so that we can properly report 2645 * underflow/underflow. 2646 */ 2647 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2648 2649 /* 2650 * Report write underflow as error since CTL and backends don't 2651 * really support it, and SCSI does not tell how to do it right. 2652 */ 2653 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2654 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2655 expected_len) { 2656 io->scsiio.io_hdr.port_status = 43; 2657 io->scsiio.be_move_done(io); 2658 return; 2659 } 2660 2661 target_transfer_tag = 2662 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2663 2664#if 0 2665 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2666 "task tag 0x%x, target transfer tag 0x%x", 2667 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2668#endif 2669 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2670 if (cdw == NULL) { 2671 CFISCSI_SESSION_WARN(cs, "failed to " 2672 "allocate memory; dropping connection"); 2673 ctl_set_busy(&io->scsiio); 2674 io->scsiio.be_move_done(io); 2675 cfiscsi_session_terminate(cs); 2676 return; 2677 } 2678 cdw->cdw_ctl_io = io; 2679 cdw->cdw_target_transfer_tag = target_transfer_tag; 2680 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2681 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2682 cdw->cdw_datasn = 0; 2683 2684 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2685 if (io->scsiio.kern_sg_entries > 0) { 2686 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2687 } else { 2688 ctl_sglist = &ctl_sg_entry; 2689 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2690 ctl_sglist->len = io->scsiio.kern_data_len; 2691 } 2692 cdw->cdw_sg_index = 0; 2693 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2694 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2695 r2t_off = io->scsiio.ext_data_filled; 2696 while (r2t_off > 0) { 2697 if (r2t_off >= cdw->cdw_sg_len) { 2698 r2t_off -= cdw->cdw_sg_len; 2699 cdw->cdw_sg_index++; 2700 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2701 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2702 continue; 2703 } 2704 cdw->cdw_sg_addr += r2t_off; 2705 cdw->cdw_sg_len -= r2t_off; 2706 r2t_off = 0; 2707 } 2708 2709 if (cs->cs_immediate_data && 2710 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2711 icl_pdu_data_segment_length(request)) { 2712 done = cfiscsi_handle_data_segment(request, cdw); 2713 if (done) { 2714 uma_zfree(cfiscsi_data_wait_zone, cdw); 2715 io->scsiio.be_move_done(io); 2716 return; 2717 } 2718 } 2719 2720 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2721 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2722 cs->cs_max_burst_length); 2723 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2724 2725 CFISCSI_SESSION_LOCK(cs); 2726 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2727 CFISCSI_SESSION_UNLOCK(cs); 2728 2729 /* 2730 * XXX: We should limit the number of outstanding R2T PDUs 2731 * per task to MaxOutstandingR2T. 2732 */ 2733 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2734 if (response == NULL) { 2735 CFISCSI_SESSION_WARN(cs, "failed to " 2736 "allocate memory; dropping connection"); 2737 ctl_set_busy(&io->scsiio); 2738 io->scsiio.be_move_done(io); 2739 cfiscsi_session_terminate(cs); 2740 return; 2741 } 2742 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2743 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2744 bhsr2t->bhsr2t_flags = 0x80; 2745 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2746 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2747 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2748 /* 2749 * XXX: Here we assume that cfiscsi_datamove() won't ever 2750 * be running concurrently on several CPUs for a given 2751 * command. 2752 */ 2753 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2754 PDU_R2TSN(request)++; 2755 /* 2756 * This is the offset within the current SCSI command; 2757 * i.e. for the first call of datamove(), it will be 0, 2758 * and for subsequent ones it will be the sum of lengths 2759 * of previous ones. 2760 * 2761 * The ext_data_filled is to account for unsolicited 2762 * (immediate) data that might have already arrived. 2763 */ 2764 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2765 /* 2766 * This is the total length (sum of S/G lengths) this call 2767 * to cfiscsi_datamove() is supposed to handle, limited by 2768 * MaxBurstLength. 2769 */ 2770 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2771 cfiscsi_pdu_queue(response); 2772} 2773 2774static void 2775cfiscsi_datamove(union ctl_io *io) 2776{ 2777 2778 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2779 cfiscsi_datamove_in(io); 2780 else { 2781 /* We hadn't received anything during this datamove yet. */ 2782 io->scsiio.ext_data_filled = 0; 2783 cfiscsi_datamove_out(io); 2784 } 2785} 2786 2787static void 2788cfiscsi_scsi_command_done(union ctl_io *io) 2789{ 2790 struct icl_pdu *request, *response; 2791 struct iscsi_bhs_scsi_command *bhssc; 2792 struct iscsi_bhs_scsi_response *bhssr; 2793#ifdef DIAGNOSTIC 2794 struct cfiscsi_data_wait *cdw; 2795#endif 2796 struct cfiscsi_session *cs; 2797 uint16_t sense_length; 2798 2799 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2800 cs = PDU_SESSION(request); 2801 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2802 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2803 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2804 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2805 2806 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2807 // bhssc->bhssc_initiator_task_tag); 2808 2809#ifdef DIAGNOSTIC 2810 CFISCSI_SESSION_LOCK(cs); 2811 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2812 KASSERT(bhssc->bhssc_initiator_task_tag != 2813 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2814 CFISCSI_SESSION_UNLOCK(cs); 2815#endif 2816 2817 /* 2818 * Do not return status for aborted commands. 2819 * There are exceptions, but none supported by CTL yet. 2820 */ 2821 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2822 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2823 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2824 ctl_free_io(io); 2825 icl_pdu_free(request); 2826 return; 2827 } 2828 2829 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2830 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2831 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2832 bhssr->bhssr_flags = 0x80; 2833 /* 2834 * XXX: We don't deal with bidirectional under/overflows; 2835 * does anything actually support those? 2836 */ 2837 if (PDU_TOTAL_TRANSFER_LEN(request) < 2838 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2839 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2840 bhssr->bhssr_residual_count = 2841 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2842 PDU_TOTAL_TRANSFER_LEN(request)); 2843 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2844 // ntohl(bhssr->bhssr_residual_count)); 2845 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2846 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2847 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2848 bhssr->bhssr_residual_count = 2849 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2850 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2851 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2852 // ntohl(bhssr->bhssr_residual_count)); 2853 } 2854 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2855 bhssr->bhssr_status = io->scsiio.scsi_status; 2856 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2857 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2858 2859 if (io->scsiio.sense_len > 0) { 2860#if 0 2861 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2862 io->scsiio.sense_len); 2863#endif 2864 sense_length = htons(io->scsiio.sense_len); 2865 icl_pdu_append_data(response, 2866 &sense_length, sizeof(sense_length), M_WAITOK); 2867 icl_pdu_append_data(response, 2868 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2869 } 2870 2871 ctl_free_io(io); 2872 icl_pdu_free(request); 2873 cfiscsi_pdu_queue(response); 2874} 2875 2876static void 2877cfiscsi_task_management_done(union ctl_io *io) 2878{ 2879 struct icl_pdu *request, *response; 2880 struct iscsi_bhs_task_management_request *bhstmr; 2881 struct iscsi_bhs_task_management_response *bhstmr2; 2882 struct cfiscsi_data_wait *cdw, *tmpcdw; 2883 struct cfiscsi_session *cs; 2884 2885 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2886 cs = PDU_SESSION(request); 2887 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2888 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2889 ISCSI_BHS_OPCODE_TASK_REQUEST, 2890 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2891 2892#if 0 2893 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2894 bhstmr->bhstmr_initiator_task_tag, 2895 bhstmr->bhstmr_referenced_task_tag); 2896#endif 2897 2898 if ((bhstmr->bhstmr_function & ~0x80) == 2899 BHSTMR_FUNCTION_ABORT_TASK) { 2900 /* 2901 * Make sure we no longer wait for Data-Out for this command. 2902 */ 2903 CFISCSI_SESSION_LOCK(cs); 2904 TAILQ_FOREACH_SAFE(cdw, 2905 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2906 if (bhstmr->bhstmr_referenced_task_tag != 2907 cdw->cdw_initiator_task_tag) 2908 continue; 2909 2910#if 0 2911 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2912 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2913#endif 2914 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2915 cdw, cdw_next); 2916 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2917 uma_zfree(cfiscsi_data_wait_zone, cdw); 2918 } 2919 CFISCSI_SESSION_UNLOCK(cs); 2920 } 2921 2922 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2923 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2924 response->ip_bhs; 2925 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2926 bhstmr2->bhstmr_flags = 0x80; 2927 if (io->io_hdr.status == CTL_SUCCESS) { 2928 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2929 } else { 2930 /* 2931 * XXX: How to figure out what exactly went wrong? iSCSI spec 2932 * expects us to provide detailed error, e.g. "Task does 2933 * not exist" or "LUN does not exist". 2934 */ 2935 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2936 bhstmr2->bhstmr_response = 2937 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2938 } 2939 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2940 2941 ctl_free_io(io); 2942 icl_pdu_free(request); 2943 cfiscsi_pdu_queue(response); 2944} 2945 2946static void 2947cfiscsi_done(union ctl_io *io) 2948{ 2949 struct icl_pdu *request; 2950 struct cfiscsi_session *cs; 2951 2952 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2953 ("invalid CTL status %#x", io->io_hdr.status)); 2954 2955 if (io->io_hdr.io_type == CTL_IO_TASK && 2956 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2957 /* 2958 * Implicit task termination has just completed; nothing to do. 2959 */ 2960 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2961 cs->cs_tasks_aborted = true; 2962 refcount_release(&cs->cs_outstanding_ctl_pdus); 2963 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2964 ctl_free_io(io); 2965 return; 2966 } 2967 2968 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2969 cs = PDU_SESSION(request); 2970 refcount_release(&cs->cs_outstanding_ctl_pdus); 2971 2972 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2973 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2974 cfiscsi_scsi_command_done(io); 2975 break; 2976 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2977 cfiscsi_task_management_done(io); 2978 break; 2979 default: 2980 panic("cfiscsi_done called with wrong opcode 0x%x", 2981 request->ip_bhs->bhs_opcode); 2982 } 2983} 2984