ctl_frontend_iscsi.c revision 288211
1/*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 288211 2015-09-25 07:27:23Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 288211 2015-09-25 07:27:23Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capsicum.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_debug.h> 65#include <cam/ctl/ctl_ha.h> 66#include <cam/ctl/ctl_ioctl.h> 67#include <cam/ctl/ctl_private.h> 68 69#include <dev/iscsi/icl.h> 70#include <dev/iscsi/icl_wrappers.h> 71#include <dev/iscsi/iscsi_proto.h> 72#include <cam/ctl/ctl_frontend_iscsi.h> 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 1; 88SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 89 &debug, 1, "Enable debug messages"); 90static int ping_timeout = 5; 91SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 92 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 93static int login_timeout = 60; 94SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 95 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 96static int maxcmdsn_delta = 256; 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 98 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 99 "without confirmation"); 100 101#define CFISCSI_DEBUG(X, ...) \ 102 do { \ 103 if (debug > 1) { \ 104 printf("%s: " X "\n", \ 105 __func__, ## __VA_ARGS__); \ 106 } \ 107 } while (0) 108 109#define CFISCSI_WARN(X, ...) \ 110 do { \ 111 if (debug > 0) { \ 112 printf("WARNING: %s: " X "\n", \ 113 __func__, ## __VA_ARGS__); \ 114 } \ 115 } while (0) 116 117#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 118 do { \ 119 if (debug > 1) { \ 120 printf("%s: %s (%s): " X "\n", \ 121 __func__, S->cs_initiator_addr, \ 122 S->cs_initiator_name, ## __VA_ARGS__); \ 123 } \ 124 } while (0) 125 126#define CFISCSI_SESSION_WARN(S, X, ...) \ 127 do { \ 128 if (debug > 0) { \ 129 printf("WARNING: %s (%s): " X "\n", \ 130 S->cs_initiator_addr, \ 131 S->cs_initiator_name, ## __VA_ARGS__); \ 132 } \ 133 } while (0) 134 135#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 136#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 137#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 138 139#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 140#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 141#define PDU_EXPDATASN(X) (X)->ip_prv0 142#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 143#define PDU_R2TSN(X) (X)->ip_prv2 144 145int cfiscsi_init(void); 146static void cfiscsi_online(void *arg); 147static void cfiscsi_offline(void *arg); 148static int cfiscsi_info(void *arg, struct sbuf *sb); 149static int cfiscsi_ioctl(struct cdev *dev, 150 u_long cmd, caddr_t addr, int flag, struct thread *td); 151static void cfiscsi_datamove(union ctl_io *io); 152static void cfiscsi_datamove_in(union ctl_io *io); 153static void cfiscsi_datamove_out(union ctl_io *io); 154static void cfiscsi_done(union ctl_io *io); 155static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 156static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 157static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 158static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 159static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 160static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 161static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 162static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 163 struct cfiscsi_session *cs, union ctl_io *io, 164 uint32_t initiator_task_tag, 165 uint32_t *target_transfer_tagp); 166static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 167 struct cfiscsi_data_wait *cdw); 168static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 169 *softc, const char *name, uint16_t tag); 170static struct cfiscsi_target *cfiscsi_target_find_or_create( 171 struct cfiscsi_softc *softc, const char *name, const char *alias, 172 uint16_t tag); 173static void cfiscsi_target_release(struct cfiscsi_target *ct); 174static void cfiscsi_session_delete(struct cfiscsi_session *cs); 175 176static struct cfiscsi_softc cfiscsi_softc; 177 178static struct ctl_frontend cfiscsi_frontend = 179{ 180 .name = "iscsi", 181 .init = cfiscsi_init, 182 .ioctl = cfiscsi_ioctl, 183}; 184CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 185MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 186 187static struct icl_pdu * 188cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 189{ 190 191 return (icl_pdu_new(request->ip_conn, flags)); 192} 193 194static bool 195cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 196{ 197 const struct iscsi_bhs_scsi_command *bhssc; 198 struct cfiscsi_session *cs; 199 uint32_t cmdsn, expstatsn; 200 201 cs = PDU_SESSION(request); 202 203 /* 204 * Every incoming PDU - not just NOP-Out - resets the ping timer. 205 * The purpose of the timeout is to reset the connection when it stalls; 206 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 207 * in some queue. 208 * 209 * XXX: Locking? 210 */ 211 cs->cs_timeout = 0; 212 213 /* 214 * Data-Out PDUs don't contain CmdSN. 215 */ 216 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 217 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 218 return (false); 219 220 /* 221 * We're only using fields common for all the request 222 * (initiator -> target) PDUs. 223 */ 224 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 225 cmdsn = ntohl(bhssc->bhssc_cmdsn); 226 expstatsn = ntohl(bhssc->bhssc_expstatsn); 227 228 CFISCSI_SESSION_LOCK(cs); 229#if 0 230 if (expstatsn != cs->cs_statsn) { 231 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 232 "while current StatSN is %d", expstatsn, 233 cs->cs_statsn); 234 } 235#endif 236 237 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 238 /* 239 * The target MUST silently ignore any non-immediate command 240 * outside of this range. 241 */ 242 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 243 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 244 CFISCSI_SESSION_UNLOCK(cs); 245 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 246 "while expected %u", cmdsn, cs->cs_cmdsn); 247 return (true); 248 } 249 250 /* 251 * We don't support multiple connections now, so any 252 * discontinuity in CmdSN means lost PDUs. Since we don't 253 * support PDU retransmission -- terminate the connection. 254 */ 255 if (cmdsn != cs->cs_cmdsn) { 256 CFISCSI_SESSION_UNLOCK(cs); 257 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 258 "while expected %u; dropping connection", 259 cmdsn, cs->cs_cmdsn); 260 cfiscsi_session_terminate(cs); 261 return (true); 262 } 263 cs->cs_cmdsn++; 264 } 265 266 CFISCSI_SESSION_UNLOCK(cs); 267 268 return (false); 269} 270 271static void 272cfiscsi_pdu_handle(struct icl_pdu *request) 273{ 274 struct cfiscsi_session *cs; 275 bool ignore; 276 277 cs = PDU_SESSION(request); 278 279 ignore = cfiscsi_pdu_update_cmdsn(request); 280 if (ignore) { 281 icl_pdu_free(request); 282 return; 283 } 284 285 /* 286 * Handle the PDU; this includes e.g. receiving the remaining 287 * part of PDU and submitting the SCSI command to CTL 288 * or queueing a reply. The handling routine is responsible 289 * for freeing the PDU when it's no longer needed. 290 */ 291 switch (request->ip_bhs->bhs_opcode & 292 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 293 case ISCSI_BHS_OPCODE_NOP_OUT: 294 cfiscsi_pdu_handle_nop_out(request); 295 break; 296 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 297 cfiscsi_pdu_handle_scsi_command(request); 298 break; 299 case ISCSI_BHS_OPCODE_TASK_REQUEST: 300 cfiscsi_pdu_handle_task_request(request); 301 break; 302 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 303 cfiscsi_pdu_handle_data_out(request); 304 break; 305 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 306 cfiscsi_pdu_handle_logout_request(request); 307 break; 308 default: 309 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 310 "opcode 0x%x; dropping connection", 311 request->ip_bhs->bhs_opcode); 312 icl_pdu_free(request); 313 cfiscsi_session_terminate(cs); 314 } 315 316} 317 318static void 319cfiscsi_receive_callback(struct icl_pdu *request) 320{ 321 struct cfiscsi_session *cs; 322 323 cs = PDU_SESSION(request); 324 325#ifdef ICL_KERNEL_PROXY 326 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 327 if (cs->cs_login_pdu == NULL) 328 cs->cs_login_pdu = request; 329 else 330 icl_pdu_free(request); 331 cv_signal(&cs->cs_login_cv); 332 return; 333 } 334#endif 335 336 cfiscsi_pdu_handle(request); 337} 338 339static void 340cfiscsi_error_callback(struct icl_conn *ic) 341{ 342 struct cfiscsi_session *cs; 343 344 cs = CONN_SESSION(ic); 345 346 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 347 cfiscsi_session_terminate(cs); 348} 349 350static int 351cfiscsi_pdu_prepare(struct icl_pdu *response) 352{ 353 struct cfiscsi_session *cs; 354 struct iscsi_bhs_scsi_response *bhssr; 355 bool advance_statsn = true; 356 357 cs = PDU_SESSION(response); 358 359 CFISCSI_SESSION_LOCK_ASSERT(cs); 360 361 /* 362 * We're only using fields common for all the response 363 * (target -> initiator) PDUs. 364 */ 365 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 366 367 /* 368 * 10.8.3: "The StatSN for this connection is not advanced 369 * after this PDU is sent." 370 */ 371 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 372 advance_statsn = false; 373 374 /* 375 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 376 * StatSN for the connection is not advanced after this PDU is sent." 377 */ 378 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 379 bhssr->bhssr_initiator_task_tag == 0xffffffff) 380 advance_statsn = false; 381 382 /* 383 * See the comment below - StatSN is not meaningful and must 384 * not be advanced. 385 */ 386 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 387 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 388 advance_statsn = false; 389 390 /* 391 * 10.7.3: "The fields StatSN, Status, and Residual Count 392 * only have meaningful content if the S bit is set to 1." 393 */ 394 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 395 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 396 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 397 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 398 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 399 400 if (advance_statsn) 401 cs->cs_statsn++; 402 403 return (0); 404} 405 406static void 407cfiscsi_pdu_queue(struct icl_pdu *response) 408{ 409 struct cfiscsi_session *cs; 410 411 cs = PDU_SESSION(response); 412 413 CFISCSI_SESSION_LOCK(cs); 414 cfiscsi_pdu_prepare(response); 415 icl_pdu_queue(response); 416 CFISCSI_SESSION_UNLOCK(cs); 417} 418 419static uint32_t 420cfiscsi_decode_lun(uint64_t encoded) 421{ 422 uint8_t lun[8]; 423 uint32_t result; 424 425 /* 426 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 427 * but is in fact an evil, multidimensional structure defined 428 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 429 */ 430 memcpy(lun, &encoded, sizeof(lun)); 431 switch (lun[0] & 0xC0) { 432 case 0x00: 433 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 434 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 435 CFISCSI_WARN("malformed LUN " 436 "(peripheral device addressing method): 0x%jx", 437 (uintmax_t)encoded); 438 result = 0xffffffff; 439 break; 440 } 441 result = lun[1]; 442 break; 443 case 0x40: 444 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 445 lun[6] != 0 || lun[7] != 0) { 446 CFISCSI_WARN("malformed LUN " 447 "(flat address space addressing method): 0x%jx", 448 (uintmax_t)encoded); 449 result = 0xffffffff; 450 break; 451 } 452 result = ((lun[0] & 0x3f) << 8) + lun[1]; 453 break; 454 case 0xC0: 455 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 456 lun[6] != 0 || lun[7] != 0) { 457 CFISCSI_WARN("malformed LUN (extended flat " 458 "address space addressing method): 0x%jx", 459 (uintmax_t)encoded); 460 result = 0xffffffff; 461 break; 462 } 463 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 464 default: 465 CFISCSI_WARN("unsupported LUN format 0x%jx", 466 (uintmax_t)encoded); 467 result = 0xffffffff; 468 break; 469 } 470 471 return (result); 472} 473 474static void 475cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 476{ 477 struct cfiscsi_session *cs; 478 struct iscsi_bhs_nop_out *bhsno; 479 struct iscsi_bhs_nop_in *bhsni; 480 struct icl_pdu *response; 481 void *data = NULL; 482 size_t datasize; 483 int error; 484 485 cs = PDU_SESSION(request); 486 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 487 488 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 489 /* 490 * Nothing to do, iscsi_pdu_update_statsn() already 491 * zeroed the timeout. 492 */ 493 icl_pdu_free(request); 494 return; 495 } 496 497 datasize = icl_pdu_data_segment_length(request); 498 if (datasize > 0) { 499 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 500 if (data == NULL) { 501 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 502 "dropping connection"); 503 icl_pdu_free(request); 504 cfiscsi_session_terminate(cs); 505 return; 506 } 507 icl_pdu_get_data(request, 0, data, datasize); 508 } 509 510 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 511 if (response == NULL) { 512 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 513 "droppping connection"); 514 free(data, M_CFISCSI); 515 icl_pdu_free(request); 516 cfiscsi_session_terminate(cs); 517 return; 518 } 519 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 520 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 521 bhsni->bhsni_flags = 0x80; 522 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 523 bhsni->bhsni_target_transfer_tag = 0xffffffff; 524 if (datasize > 0) { 525 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 526 if (error != 0) { 527 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 528 "dropping connection"); 529 free(data, M_CFISCSI); 530 icl_pdu_free(request); 531 icl_pdu_free(response); 532 cfiscsi_session_terminate(cs); 533 return; 534 } 535 free(data, M_CFISCSI); 536 } 537 538 icl_pdu_free(request); 539 cfiscsi_pdu_queue(response); 540} 541 542static void 543cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 544{ 545 struct iscsi_bhs_scsi_command *bhssc; 546 struct cfiscsi_session *cs; 547 union ctl_io *io; 548 int error; 549 550 cs = PDU_SESSION(request); 551 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 552 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 553 // bhssc->bhssc_initiator_task_tag); 554 555 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 556 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 557 "ImmediateData=No; dropping connection"); 558 icl_pdu_free(request); 559 cfiscsi_session_terminate(cs); 560 return; 561 } 562 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 563 ctl_zero_io(io); 564 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 565 io->io_hdr.io_type = CTL_IO_SCSI; 566 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 567 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 568 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 569 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 570 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 571 case BHSSC_FLAGS_ATTR_UNTAGGED: 572 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 573 break; 574 case BHSSC_FLAGS_ATTR_SIMPLE: 575 io->scsiio.tag_type = CTL_TAG_SIMPLE; 576 break; 577 case BHSSC_FLAGS_ATTR_ORDERED: 578 io->scsiio.tag_type = CTL_TAG_ORDERED; 579 break; 580 case BHSSC_FLAGS_ATTR_HOQ: 581 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 582 break; 583 case BHSSC_FLAGS_ATTR_ACA: 584 io->scsiio.tag_type = CTL_TAG_ACA; 585 break; 586 default: 587 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 588 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 589 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 590 break; 591 } 592 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 593 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 594 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 595 error = ctl_queue(io); 596 if (error != CTL_RETVAL_COMPLETE) { 597 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 598 "dropping connection", error); 599 ctl_free_io(io); 600 refcount_release(&cs->cs_outstanding_ctl_pdus); 601 icl_pdu_free(request); 602 cfiscsi_session_terminate(cs); 603 } 604} 605 606static void 607cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 608{ 609 struct iscsi_bhs_task_management_request *bhstmr; 610 struct iscsi_bhs_task_management_response *bhstmr2; 611 struct icl_pdu *response; 612 struct cfiscsi_session *cs; 613 union ctl_io *io; 614 int error; 615 616 cs = PDU_SESSION(request); 617 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 618 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 619 ctl_zero_io(io); 620 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 621 io->io_hdr.io_type = CTL_IO_TASK; 622 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 623 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 624 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 625 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 626 627 switch (bhstmr->bhstmr_function & ~0x80) { 628 case BHSTMR_FUNCTION_ABORT_TASK: 629#if 0 630 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 631#endif 632 io->taskio.task_action = CTL_TASK_ABORT_TASK; 633 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 634 break; 635 case BHSTMR_FUNCTION_ABORT_TASK_SET: 636#if 0 637 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 638#endif 639 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 640 break; 641 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 642#if 0 643 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 644#endif 645 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 646 break; 647 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 648#if 0 649 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 650#endif 651 io->taskio.task_action = CTL_TASK_LUN_RESET; 652 break; 653 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 654#if 0 655 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 656#endif 657 io->taskio.task_action = CTL_TASK_TARGET_RESET; 658 break; 659 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 660#if 0 661 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 662#endif 663 io->taskio.task_action = CTL_TASK_TARGET_RESET; 664 break; 665 case BHSTMR_FUNCTION_QUERY_TASK: 666#if 0 667 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 668#endif 669 io->taskio.task_action = CTL_TASK_QUERY_TASK; 670 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 671 break; 672 case BHSTMR_FUNCTION_QUERY_TASK_SET: 673#if 0 674 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 675#endif 676 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 677 break; 678 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 679#if 0 680 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 681#endif 682 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 683 break; 684 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 685#if 0 686 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 687#endif 688 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 689 break; 690 default: 691 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 692 bhstmr->bhstmr_function & ~0x80); 693 ctl_free_io(io); 694 695 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 696 if (response == NULL) { 697 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 698 "dropping connection"); 699 icl_pdu_free(request); 700 cfiscsi_session_terminate(cs); 701 return; 702 } 703 bhstmr2 = (struct iscsi_bhs_task_management_response *) 704 response->ip_bhs; 705 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 706 bhstmr2->bhstmr_flags = 0x80; 707 bhstmr2->bhstmr_response = 708 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 709 bhstmr2->bhstmr_initiator_task_tag = 710 bhstmr->bhstmr_initiator_task_tag; 711 icl_pdu_free(request); 712 cfiscsi_pdu_queue(response); 713 return; 714 } 715 716 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 717 error = ctl_queue(io); 718 if (error != CTL_RETVAL_COMPLETE) { 719 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 720 "dropping connection", error); 721 ctl_free_io(io); 722 refcount_release(&cs->cs_outstanding_ctl_pdus); 723 icl_pdu_free(request); 724 cfiscsi_session_terminate(cs); 725 } 726} 727 728static bool 729cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 730{ 731 struct iscsi_bhs_data_out *bhsdo; 732 struct cfiscsi_session *cs; 733 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 734 size_t copy_len, len, off, buffer_offset; 735 int ctl_sg_count; 736 union ctl_io *io; 737 738 cs = PDU_SESSION(request); 739 740 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 741 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 742 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 743 ISCSI_BHS_OPCODE_SCSI_COMMAND, 744 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 745 746 /* 747 * We're only using fields common for Data-Out and SCSI Command PDUs. 748 */ 749 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 750 751 io = cdw->cdw_ctl_io; 752 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 753 ("CTL_FLAG_DATA_IN")); 754 755#if 0 756 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 757 request->ip_data_len, io->scsiio.kern_total_len); 758#endif 759 760 if (io->scsiio.kern_sg_entries > 0) { 761 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 762 ctl_sg_count = io->scsiio.kern_sg_entries; 763 } else { 764 ctl_sglist = &ctl_sg_entry; 765 ctl_sglist->addr = io->scsiio.kern_data_ptr; 766 ctl_sglist->len = io->scsiio.kern_data_len; 767 ctl_sg_count = 1; 768 } 769 770 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 771 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 772 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 773 else 774 buffer_offset = 0; 775 len = icl_pdu_data_segment_length(request); 776 777 /* 778 * Make sure the offset, as sent by the initiator, matches the offset 779 * we're supposed to be at in the scatter-gather list. 780 */ 781 if (buffer_offset > 782 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 783 buffer_offset + len <= 784 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 785 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 786 "expected %zd; dropping connection", buffer_offset, 787 (size_t)io->scsiio.kern_rel_offset + 788 (size_t)io->scsiio.ext_data_filled); 789 ctl_set_data_phase_error(&io->scsiio); 790 cfiscsi_session_terminate(cs); 791 return (true); 792 } 793 794 /* 795 * This is the offset within the PDU data segment, as opposed 796 * to buffer_offset, which is the offset within the task (SCSI 797 * command). 798 */ 799 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 800 buffer_offset; 801 802 /* 803 * Iterate over the scatter/gather segments, filling them with data 804 * from the PDU data segment. Note that this can get called multiple 805 * times for one SCSI command; the cdw structure holds state for the 806 * scatter/gather list. 807 */ 808 for (;;) { 809 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 810 ("cdw->cdw_sg_index >= ctl_sg_count")); 811 if (cdw->cdw_sg_len == 0) { 812 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 813 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 814 } 815 KASSERT(off <= len, ("len > off")); 816 copy_len = len - off; 817 if (copy_len > cdw->cdw_sg_len) 818 copy_len = cdw->cdw_sg_len; 819 820 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 821 cdw->cdw_sg_addr += copy_len; 822 cdw->cdw_sg_len -= copy_len; 823 off += copy_len; 824 io->scsiio.ext_data_filled += copy_len; 825 826 if (cdw->cdw_sg_len == 0) { 827 /* 828 * End of current segment. 829 */ 830 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 831 /* 832 * Last segment in scatter/gather list. 833 */ 834 break; 835 } 836 cdw->cdw_sg_index++; 837 } 838 839 if (off == len) { 840 /* 841 * End of PDU payload. 842 */ 843 break; 844 } 845 } 846 847 if (len > off) { 848 /* 849 * In case of unsolicited data, it's possible that the buffer 850 * provided by CTL is smaller than negotiated FirstBurstLength. 851 * Just ignore the superfluous data; will ask for them with R2T 852 * on next call to cfiscsi_datamove(). 853 * 854 * This obviously can only happen with SCSI Command PDU. 855 */ 856 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 857 ISCSI_BHS_OPCODE_SCSI_COMMAND) 858 return (true); 859 860 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 861 "expected %zd; dropping connection", 862 icl_pdu_data_segment_length(request), off); 863 ctl_set_data_phase_error(&io->scsiio); 864 cfiscsi_session_terminate(cs); 865 return (true); 866 } 867 868 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 869 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 870 CFISCSI_SESSION_WARN(cs, "got the final packet without " 871 "the F flag; flags = 0x%x; dropping connection", 872 bhsdo->bhsdo_flags); 873 ctl_set_data_phase_error(&io->scsiio); 874 cfiscsi_session_terminate(cs); 875 return (true); 876 } 877 878 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 879 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 880 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 881 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 882 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 883 "transmitted size was %zd bytes instead of %d; " 884 "dropping connection", 885 (size_t)io->scsiio.ext_data_filled, 886 cdw->cdw_r2t_end); 887 ctl_set_data_phase_error(&io->scsiio); 888 cfiscsi_session_terminate(cs); 889 return (true); 890 } else { 891 /* 892 * For SCSI Command PDU, this just means we need to 893 * solicit more data by sending R2T. 894 */ 895 return (false); 896 } 897 } 898 899 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 900#if 0 901 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 902 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 903#endif 904 905 return (true); 906 } 907 908 return (false); 909} 910 911static void 912cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 913{ 914 struct iscsi_bhs_data_out *bhsdo; 915 struct cfiscsi_session *cs; 916 struct cfiscsi_data_wait *cdw = NULL; 917 union ctl_io *io; 918 bool done; 919 920 cs = PDU_SESSION(request); 921 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 922 923 CFISCSI_SESSION_LOCK(cs); 924 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 925#if 0 926 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 927 "ttt 0x%x, itt 0x%x", 928 bhsdo->bhsdo_target_transfer_tag, 929 bhsdo->bhsdo_initiator_task_tag, 930 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 931#endif 932 if (bhsdo->bhsdo_target_transfer_tag == 933 cdw->cdw_target_transfer_tag) 934 break; 935 } 936 CFISCSI_SESSION_UNLOCK(cs); 937 if (cdw == NULL) { 938 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 939 "0x%x, not found; dropping connection", 940 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 941 icl_pdu_free(request); 942 cfiscsi_session_terminate(cs); 943 return; 944 } 945 946 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 947 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 948 "DataSN %u, while expected %u; dropping connection", 949 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 950 icl_pdu_free(request); 951 cfiscsi_session_terminate(cs); 952 return; 953 } 954 cdw->cdw_datasn++; 955 956 io = cdw->cdw_ctl_io; 957 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 958 ("CTL_FLAG_DATA_IN")); 959 960 done = cfiscsi_handle_data_segment(request, cdw); 961 if (done) { 962 CFISCSI_SESSION_LOCK(cs); 963 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 964 CFISCSI_SESSION_UNLOCK(cs); 965 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 966 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 967 cfiscsi_data_wait_free(cs, cdw); 968 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 969 if (done) 970 io->scsiio.be_move_done(io); 971 else 972 cfiscsi_datamove_out(io); 973 } 974 975 icl_pdu_free(request); 976} 977 978static void 979cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 980{ 981 struct iscsi_bhs_logout_request *bhslr; 982 struct iscsi_bhs_logout_response *bhslr2; 983 struct icl_pdu *response; 984 struct cfiscsi_session *cs; 985 986 cs = PDU_SESSION(request); 987 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 988 switch (bhslr->bhslr_reason & 0x7f) { 989 case BHSLR_REASON_CLOSE_SESSION: 990 case BHSLR_REASON_CLOSE_CONNECTION: 991 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 992 if (response == NULL) { 993 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 994 icl_pdu_free(request); 995 cfiscsi_session_terminate(cs); 996 return; 997 } 998 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 999 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 1000 bhslr2->bhslr_flags = 0x80; 1001 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 1002 bhslr2->bhslr_initiator_task_tag = 1003 bhslr->bhslr_initiator_task_tag; 1004 icl_pdu_free(request); 1005 cfiscsi_pdu_queue(response); 1006 cfiscsi_session_terminate(cs); 1007 break; 1008 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 1009 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 1010 if (response == NULL) { 1011 CFISCSI_SESSION_WARN(cs, 1012 "failed to allocate memory; dropping connection"); 1013 icl_pdu_free(request); 1014 cfiscsi_session_terminate(cs); 1015 return; 1016 } 1017 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 1018 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 1019 bhslr2->bhslr_flags = 0x80; 1020 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 1021 bhslr2->bhslr_initiator_task_tag = 1022 bhslr->bhslr_initiator_task_tag; 1023 icl_pdu_free(request); 1024 cfiscsi_pdu_queue(response); 1025 break; 1026 default: 1027 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 1028 bhslr->bhslr_reason); 1029 icl_pdu_free(request); 1030 cfiscsi_session_terminate(cs); 1031 break; 1032 } 1033} 1034 1035static void 1036cfiscsi_callout(void *context) 1037{ 1038 struct icl_pdu *cp; 1039 struct iscsi_bhs_nop_in *bhsni; 1040 struct cfiscsi_session *cs; 1041 1042 cs = context; 1043 1044 if (cs->cs_terminating) 1045 return; 1046 1047 callout_schedule(&cs->cs_callout, 1 * hz); 1048 1049 atomic_add_int(&cs->cs_timeout, 1); 1050 1051#ifdef ICL_KERNEL_PROXY 1052 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1053 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1054 CFISCSI_SESSION_WARN(cs, "login timed out after " 1055 "%d seconds; dropping connection", cs->cs_timeout); 1056 cfiscsi_session_terminate(cs); 1057 } 1058 return; 1059 } 1060#endif 1061 1062 if (ping_timeout <= 0) { 1063 /* 1064 * Pings are disabled. Don't send NOP-In in this case; 1065 * user might have disabled pings to work around problems 1066 * with certain initiators that can't properly handle 1067 * NOP-In, such as iPXE. Reset the timeout, to avoid 1068 * triggering reconnection, should the user decide to 1069 * reenable them. 1070 */ 1071 cs->cs_timeout = 0; 1072 return; 1073 } 1074 1075 if (cs->cs_timeout >= ping_timeout) { 1076 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1077 "dropping connection", ping_timeout); 1078 cfiscsi_session_terminate(cs); 1079 return; 1080 } 1081 1082 /* 1083 * If the ping was reset less than one second ago - which means 1084 * that we've received some PDU during the last second - assume 1085 * the traffic flows correctly and don't bother sending a NOP-Out. 1086 * 1087 * (It's 2 - one for one second, and one for incrementing is_timeout 1088 * earlier in this routine.) 1089 */ 1090 if (cs->cs_timeout < 2) 1091 return; 1092 1093 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1094 if (cp == NULL) { 1095 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1096 return; 1097 } 1098 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1099 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1100 bhsni->bhsni_flags = 0x80; 1101 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1102 1103 cfiscsi_pdu_queue(cp); 1104} 1105 1106static struct cfiscsi_data_wait * 1107cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1108 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1109{ 1110 struct cfiscsi_data_wait *cdw; 1111 int error; 1112 1113 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1114 if (cdw == NULL) { 1115 CFISCSI_SESSION_WARN(cs, 1116 "failed to allocate %zd bytes", sizeof(*cdw)); 1117 return (NULL); 1118 } 1119 1120 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1121 &cdw->cdw_icl_prv); 1122 if (error != 0) { 1123 CFISCSI_SESSION_WARN(cs, 1124 "icl_conn_transfer_setup() failed with error %d", error); 1125 uma_zfree(cfiscsi_data_wait_zone, cdw); 1126 return (NULL); 1127 } 1128 1129 cdw->cdw_ctl_io = io; 1130 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1131 cdw->cdw_initiator_task_tag = initiator_task_tag; 1132 1133 return (cdw); 1134} 1135 1136static void 1137cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1138 struct cfiscsi_data_wait *cdw) 1139{ 1140 1141 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1142 uma_zfree(cfiscsi_data_wait_zone, cdw); 1143} 1144 1145static void 1146cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1147{ 1148 struct cfiscsi_data_wait *cdw; 1149 union ctl_io *io; 1150 int error, last, wait; 1151 1152 if (cs->cs_target == NULL) 1153 return; /* No target yet, so nothing to do. */ 1154 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1155 ctl_zero_io(io); 1156 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1157 io->io_hdr.io_type = CTL_IO_TASK; 1158 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1159 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1160 io->io_hdr.nexus.targ_lun = 0; 1161 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1162 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1163 wait = cs->cs_outstanding_ctl_pdus; 1164 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1165 error = ctl_queue(io); 1166 if (error != CTL_RETVAL_COMPLETE) { 1167 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1168 refcount_release(&cs->cs_outstanding_ctl_pdus); 1169 ctl_free_io(io); 1170 } 1171 1172 CFISCSI_SESSION_LOCK(cs); 1173 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1174 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1175 CFISCSI_SESSION_UNLOCK(cs); 1176 /* 1177 * Set nonzero port status; this prevents backends from 1178 * assuming that the data transfer actually succeeded 1179 * and writing uninitialized data to disk. 1180 */ 1181 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1182 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1183 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1184 cfiscsi_data_wait_free(cs, cdw); 1185 CFISCSI_SESSION_LOCK(cs); 1186 } 1187 CFISCSI_SESSION_UNLOCK(cs); 1188 1189 /* 1190 * Wait for CTL to terminate all the tasks. 1191 */ 1192 if (wait > 0) 1193 CFISCSI_SESSION_WARN(cs, 1194 "waiting for CTL to terminate %d tasks", wait); 1195 for (;;) { 1196 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1197 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1198 if (last != 0) 1199 break; 1200 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1201 0, "cfiscsi_terminate", hz / 100); 1202 } 1203 if (wait > 0) 1204 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1205} 1206 1207static void 1208cfiscsi_maintenance_thread(void *arg) 1209{ 1210 struct cfiscsi_session *cs; 1211 1212 cs = arg; 1213 1214 for (;;) { 1215 CFISCSI_SESSION_LOCK(cs); 1216 if (cs->cs_terminating == false) 1217 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1218 CFISCSI_SESSION_UNLOCK(cs); 1219 1220 if (cs->cs_terminating) { 1221 1222 /* 1223 * We used to wait up to 30 seconds to deliver queued 1224 * PDUs to the initiator. We also tried hard to deliver 1225 * SCSI Responses for the aborted PDUs. We don't do 1226 * that anymore. We might need to revisit that. 1227 */ 1228 callout_drain(&cs->cs_callout); 1229 icl_conn_close(cs->cs_conn); 1230 1231 /* 1232 * At this point ICL receive thread is no longer 1233 * running; no new tasks can be queued. 1234 */ 1235 cfiscsi_session_terminate_tasks(cs); 1236 cfiscsi_session_delete(cs); 1237 kthread_exit(); 1238 return; 1239 } 1240 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1241 } 1242} 1243 1244static void 1245cfiscsi_session_terminate(struct cfiscsi_session *cs) 1246{ 1247 1248 if (cs->cs_terminating) 1249 return; 1250 cs->cs_terminating = true; 1251 cv_signal(&cs->cs_maintenance_cv); 1252#ifdef ICL_KERNEL_PROXY 1253 cv_signal(&cs->cs_login_cv); 1254#endif 1255} 1256 1257static int 1258cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1259{ 1260 struct cfiscsi_target *ct; 1261 char *name; 1262 int i; 1263 1264 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1265 1266 ct = cs->cs_target; 1267 name = strdup(cs->cs_initiator_id, M_CTL); 1268 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1269 if (i < 0) { 1270 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1271 i); 1272 cs->cs_ctl_initid = -1; 1273 return (1); 1274 } 1275 cs->cs_ctl_initid = i; 1276#if 0 1277 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1278#endif 1279 1280 return (0); 1281} 1282 1283static void 1284cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1285{ 1286 int error; 1287 1288 if (cs->cs_ctl_initid == -1) 1289 return; 1290 1291 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1292 if (error != 0) { 1293 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1294 error); 1295 } 1296 cs->cs_ctl_initid = -1; 1297} 1298 1299static struct cfiscsi_session * 1300cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1301{ 1302 struct cfiscsi_session *cs; 1303 int error; 1304 1305 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1306 if (cs == NULL) { 1307 CFISCSI_WARN("malloc failed"); 1308 return (NULL); 1309 } 1310 cs->cs_ctl_initid = -1; 1311 1312 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1313 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1314 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1315 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1316#ifdef ICL_KERNEL_PROXY 1317 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1318#endif 1319 1320 cs->cs_conn = icl_new_conn(offload, "cfiscsi", &cs->cs_lock); 1321 if (cs->cs_conn == NULL) { 1322 free(cs, M_CFISCSI); 1323 return (NULL); 1324 } 1325 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1326 cs->cs_conn->ic_error = cfiscsi_error_callback; 1327 cs->cs_conn->ic_prv0 = cs; 1328 1329 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1330 if (error != 0) { 1331 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1332 free(cs, M_CFISCSI); 1333 return (NULL); 1334 } 1335 1336 mtx_lock(&softc->lock); 1337 cs->cs_id = ++softc->last_session_id; 1338 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1339 mtx_unlock(&softc->lock); 1340 1341 /* 1342 * Start pinging the initiator. 1343 */ 1344 callout_init(&cs->cs_callout, 1); 1345 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1346 1347 return (cs); 1348} 1349 1350static void 1351cfiscsi_session_delete(struct cfiscsi_session *cs) 1352{ 1353 struct cfiscsi_softc *softc; 1354 1355 softc = &cfiscsi_softc; 1356 1357 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1358 ("destroying session with outstanding CTL pdus")); 1359 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1360 ("destroying session with non-empty queue")); 1361 1362 cfiscsi_session_unregister_initiator(cs); 1363 if (cs->cs_target != NULL) 1364 cfiscsi_target_release(cs->cs_target); 1365 icl_conn_close(cs->cs_conn); 1366 icl_conn_free(cs->cs_conn); 1367 1368 mtx_lock(&softc->lock); 1369 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1370 cv_signal(&softc->sessions_cv); 1371 mtx_unlock(&softc->lock); 1372 1373 free(cs, M_CFISCSI); 1374} 1375 1376int 1377cfiscsi_init(void) 1378{ 1379 struct cfiscsi_softc *softc; 1380 int retval; 1381 1382 softc = &cfiscsi_softc; 1383 retval = 0; 1384 bzero(softc, sizeof(*softc)); 1385 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1386 1387 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1388#ifdef ICL_KERNEL_PROXY 1389 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1390#endif 1391 TAILQ_INIT(&softc->sessions); 1392 TAILQ_INIT(&softc->targets); 1393 1394 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1395 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1396 UMA_ALIGN_PTR, 0); 1397 1398 return (0); 1399} 1400 1401#ifdef ICL_KERNEL_PROXY 1402static void 1403cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1404{ 1405 struct cfiscsi_session *cs; 1406 1407 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1408 if (cs == NULL) { 1409 CFISCSI_WARN("failed to create session"); 1410 return; 1411 } 1412 1413 icl_conn_handoff_sock(cs->cs_conn, so); 1414 cs->cs_initiator_sa = sa; 1415 cs->cs_portal_id = portal_id; 1416 cs->cs_waiting_for_ctld = true; 1417 cv_signal(&cfiscsi_softc.accept_cv); 1418} 1419#endif 1420 1421static void 1422cfiscsi_online(void *arg) 1423{ 1424 struct cfiscsi_softc *softc; 1425 struct cfiscsi_target *ct; 1426 int online; 1427 1428 ct = (struct cfiscsi_target *)arg; 1429 softc = ct->ct_softc; 1430 1431 mtx_lock(&softc->lock); 1432 if (ct->ct_online) { 1433 mtx_unlock(&softc->lock); 1434 return; 1435 } 1436 ct->ct_online = 1; 1437 online = softc->online++; 1438 mtx_unlock(&softc->lock); 1439 if (online > 0) 1440 return; 1441 1442#ifdef ICL_KERNEL_PROXY 1443 if (softc->listener != NULL) 1444 icl_listen_free(softc->listener); 1445 softc->listener = icl_listen_new(cfiscsi_accept); 1446#endif 1447} 1448 1449static void 1450cfiscsi_offline(void *arg) 1451{ 1452 struct cfiscsi_softc *softc; 1453 struct cfiscsi_target *ct; 1454 struct cfiscsi_session *cs; 1455 int online; 1456 1457 ct = (struct cfiscsi_target *)arg; 1458 softc = ct->ct_softc; 1459 1460 mtx_lock(&softc->lock); 1461 if (!ct->ct_online) { 1462 mtx_unlock(&softc->lock); 1463 return; 1464 } 1465 ct->ct_online = 0; 1466 online = --softc->online; 1467 1468 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1469 if (cs->cs_target == ct) 1470 cfiscsi_session_terminate(cs); 1471 } 1472 do { 1473 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1474 if (cs->cs_target == ct) 1475 break; 1476 } 1477 if (cs != NULL) 1478 cv_wait(&softc->sessions_cv, &softc->lock); 1479 } while (cs != NULL && ct->ct_online == 0); 1480 mtx_unlock(&softc->lock); 1481 if (online > 0) 1482 return; 1483 1484#ifdef ICL_KERNEL_PROXY 1485 icl_listen_free(softc->listener); 1486 softc->listener = NULL; 1487#endif 1488} 1489 1490static int 1491cfiscsi_info(void *arg, struct sbuf *sb) 1492{ 1493 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1494 int retval; 1495 1496 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1497 ct->ct_state); 1498 return (retval); 1499} 1500 1501static void 1502cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1503{ 1504 struct cfiscsi_softc *softc; 1505 struct cfiscsi_session *cs, *cs2; 1506 struct cfiscsi_target *ct; 1507 struct ctl_iscsi_handoff_params *cihp; 1508 int error; 1509 1510 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1511 softc = &cfiscsi_softc; 1512 1513 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1514 cihp->initiator_name, cihp->initiator_addr, 1515 cihp->target_name); 1516 1517 ct = cfiscsi_target_find(softc, cihp->target_name, 1518 cihp->portal_group_tag); 1519 if (ct == NULL) { 1520 ci->status = CTL_ISCSI_ERROR; 1521 snprintf(ci->error_str, sizeof(ci->error_str), 1522 "%s: target not found", __func__); 1523 return; 1524 } 1525 1526#ifdef ICL_KERNEL_PROXY 1527 if (cihp->socket > 0 && cihp->connection_id > 0) { 1528 snprintf(ci->error_str, sizeof(ci->error_str), 1529 "both socket and connection_id set"); 1530 ci->status = CTL_ISCSI_ERROR; 1531 cfiscsi_target_release(ct); 1532 return; 1533 } 1534 if (cihp->socket == 0) { 1535 mtx_lock(&cfiscsi_softc.lock); 1536 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1537 if (cs->cs_id == cihp->connection_id) 1538 break; 1539 } 1540 if (cs == NULL) { 1541 mtx_unlock(&cfiscsi_softc.lock); 1542 snprintf(ci->error_str, sizeof(ci->error_str), 1543 "connection not found"); 1544 ci->status = CTL_ISCSI_ERROR; 1545 cfiscsi_target_release(ct); 1546 return; 1547 } 1548 mtx_unlock(&cfiscsi_softc.lock); 1549 } else { 1550#endif 1551 cs = cfiscsi_session_new(softc, cihp->offload); 1552 if (cs == NULL) { 1553 ci->status = CTL_ISCSI_ERROR; 1554 snprintf(ci->error_str, sizeof(ci->error_str), 1555 "%s: cfiscsi_session_new failed", __func__); 1556 cfiscsi_target_release(ct); 1557 return; 1558 } 1559#ifdef ICL_KERNEL_PROXY 1560 } 1561#endif 1562 1563 /* 1564 * First PDU of Full Feature phase has the same CmdSN as the last 1565 * PDU from the Login Phase received from the initiator. Thus, 1566 * the -1 below. 1567 */ 1568 cs->cs_cmdsn = cihp->cmdsn; 1569 cs->cs_statsn = cihp->statsn; 1570 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1571 cs->cs_max_burst_length = cihp->max_burst_length; 1572 cs->cs_immediate_data = !!cihp->immediate_data; 1573 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1574 cs->cs_conn->ic_header_crc32c = true; 1575 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1576 cs->cs_conn->ic_data_crc32c = true; 1577 1578 strlcpy(cs->cs_initiator_name, 1579 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1580 strlcpy(cs->cs_initiator_addr, 1581 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1582 strlcpy(cs->cs_initiator_alias, 1583 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1584 memcpy(cs->cs_initiator_isid, 1585 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1586 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1587 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1588 cihp->initiator_isid[0], cihp->initiator_isid[1], 1589 cihp->initiator_isid[2], cihp->initiator_isid[3], 1590 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1591 1592 mtx_lock(&softc->lock); 1593 if (ct->ct_online == 0) { 1594 mtx_unlock(&softc->lock); 1595 cfiscsi_session_terminate(cs); 1596 cfiscsi_target_release(ct); 1597 ci->status = CTL_ISCSI_ERROR; 1598 snprintf(ci->error_str, sizeof(ci->error_str), 1599 "%s: port offline", __func__); 1600 return; 1601 } 1602 cs->cs_target = ct; 1603 mtx_unlock(&softc->lock); 1604 1605 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1606restart: 1607 if (!cs->cs_terminating) { 1608 mtx_lock(&softc->lock); 1609 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1610 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1611 cs->cs_target == cs2->cs_target && 1612 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1613 if (strcmp(cs->cs_initiator_addr, 1614 cs2->cs_initiator_addr) != 0) { 1615 CFISCSI_SESSION_WARN(cs2, 1616 "session reinstatement from " 1617 "different address %s", 1618 cs->cs_initiator_addr); 1619 } else { 1620 CFISCSI_SESSION_DEBUG(cs2, 1621 "session reinstatement"); 1622 } 1623 cfiscsi_session_terminate(cs2); 1624 mtx_unlock(&softc->lock); 1625 pause("cfiscsi_reinstate", 1); 1626 goto restart; 1627 } 1628 } 1629 mtx_unlock(&softc->lock); 1630 } 1631 1632 /* 1633 * Register initiator with CTL. 1634 */ 1635 cfiscsi_session_register_initiator(cs); 1636 1637#ifdef ICL_KERNEL_PROXY 1638 if (cihp->socket > 0) { 1639#endif 1640 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1641 if (error != 0) { 1642 cfiscsi_session_terminate(cs); 1643 refcount_release(&cs->cs_outstanding_ctl_pdus); 1644 ci->status = CTL_ISCSI_ERROR; 1645 snprintf(ci->error_str, sizeof(ci->error_str), 1646 "%s: icl_conn_handoff failed with error %d", 1647 __func__, error); 1648 return; 1649 } 1650#ifdef ICL_KERNEL_PROXY 1651 } 1652#endif 1653 1654#ifdef ICL_KERNEL_PROXY 1655 cs->cs_login_phase = false; 1656 1657 /* 1658 * First PDU of the Full Feature phase has likely already arrived. 1659 * We have to pick it up and execute properly. 1660 */ 1661 if (cs->cs_login_pdu != NULL) { 1662 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1663 cfiscsi_pdu_handle(cs->cs_login_pdu); 1664 cs->cs_login_pdu = NULL; 1665 } 1666#endif 1667 1668 refcount_release(&cs->cs_outstanding_ctl_pdus); 1669 ci->status = CTL_ISCSI_OK; 1670} 1671 1672static void 1673cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1674{ 1675 struct ctl_iscsi_list_params *cilp; 1676 struct cfiscsi_session *cs; 1677 struct cfiscsi_softc *softc; 1678 struct sbuf *sb; 1679 int error; 1680 1681 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1682 softc = &cfiscsi_softc; 1683 1684 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1685 if (sb == NULL) { 1686 ci->status = CTL_ISCSI_ERROR; 1687 snprintf(ci->error_str, sizeof(ci->error_str), 1688 "Unable to allocate %d bytes for iSCSI session list", 1689 cilp->alloc_len); 1690 return; 1691 } 1692 1693 sbuf_printf(sb, "<ctlislist>\n"); 1694 mtx_lock(&softc->lock); 1695 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1696#ifdef ICL_KERNEL_PROXY 1697 if (cs->cs_target == NULL) 1698 continue; 1699#endif 1700 error = sbuf_printf(sb, "<connection id=\"%d\">" 1701 "<initiator>%s</initiator>" 1702 "<initiator_addr>%s</initiator_addr>" 1703 "<initiator_alias>%s</initiator_alias>" 1704 "<target>%s</target>" 1705 "<target_alias>%s</target_alias>" 1706 "<target_portal_group_tag>%u</target_portal_group_tag>" 1707 "<header_digest>%s</header_digest>" 1708 "<data_digest>%s</data_digest>" 1709 "<max_data_segment_length>%zd</max_data_segment_length>" 1710 "<immediate_data>%d</immediate_data>" 1711 "<iser>%d</iser>" 1712 "<offload>%s</offload>" 1713 "</connection>\n", 1714 cs->cs_id, 1715 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1716 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1717 cs->cs_target->ct_tag, 1718 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1719 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1720 cs->cs_max_data_segment_length, 1721 cs->cs_immediate_data, 1722 cs->cs_conn->ic_iser, 1723 cs->cs_conn->ic_offload); 1724 if (error != 0) 1725 break; 1726 } 1727 mtx_unlock(&softc->lock); 1728 error = sbuf_printf(sb, "</ctlislist>\n"); 1729 if (error != 0) { 1730 sbuf_delete(sb); 1731 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1732 snprintf(ci->error_str, sizeof(ci->error_str), 1733 "Out of space, %d bytes is too small", cilp->alloc_len); 1734 return; 1735 } 1736 sbuf_finish(sb); 1737 1738 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1739 cilp->fill_len = sbuf_len(sb) + 1; 1740 ci->status = CTL_ISCSI_OK; 1741 sbuf_delete(sb); 1742} 1743 1744static void 1745cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1746{ 1747 struct icl_pdu *response; 1748 struct iscsi_bhs_asynchronous_message *bhsam; 1749 struct ctl_iscsi_logout_params *cilp; 1750 struct cfiscsi_session *cs; 1751 struct cfiscsi_softc *softc; 1752 int found = 0; 1753 1754 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1755 softc = &cfiscsi_softc; 1756 1757 mtx_lock(&softc->lock); 1758 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1759 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1760 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1761 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1762 continue; 1763 1764 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1765 if (response == NULL) { 1766 ci->status = CTL_ISCSI_ERROR; 1767 snprintf(ci->error_str, sizeof(ci->error_str), 1768 "Unable to allocate memory"); 1769 mtx_unlock(&softc->lock); 1770 return; 1771 } 1772 bhsam = 1773 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1774 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1775 bhsam->bhsam_flags = 0x80; 1776 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1777 bhsam->bhsam_parameter3 = htons(10); 1778 cfiscsi_pdu_queue(response); 1779 found++; 1780 } 1781 mtx_unlock(&softc->lock); 1782 1783 if (found == 0) { 1784 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1785 snprintf(ci->error_str, sizeof(ci->error_str), 1786 "No matching connections found"); 1787 return; 1788 } 1789 1790 ci->status = CTL_ISCSI_OK; 1791} 1792 1793static void 1794cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1795{ 1796 struct icl_pdu *response; 1797 struct iscsi_bhs_asynchronous_message *bhsam; 1798 struct ctl_iscsi_terminate_params *citp; 1799 struct cfiscsi_session *cs; 1800 struct cfiscsi_softc *softc; 1801 int found = 0; 1802 1803 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1804 softc = &cfiscsi_softc; 1805 1806 mtx_lock(&softc->lock); 1807 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1808 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1809 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1810 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1811 continue; 1812 1813 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1814 if (response == NULL) { 1815 /* 1816 * Oh well. Just terminate the connection. 1817 */ 1818 } else { 1819 bhsam = (struct iscsi_bhs_asynchronous_message *) 1820 response->ip_bhs; 1821 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1822 bhsam->bhsam_flags = 0x80; 1823 bhsam->bhsam_0xffffffff = 0xffffffff; 1824 bhsam->bhsam_async_event = 1825 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1826 cfiscsi_pdu_queue(response); 1827 } 1828 cfiscsi_session_terminate(cs); 1829 found++; 1830 } 1831 mtx_unlock(&softc->lock); 1832 1833 if (found == 0) { 1834 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1835 snprintf(ci->error_str, sizeof(ci->error_str), 1836 "No matching connections found"); 1837 return; 1838 } 1839 1840 ci->status = CTL_ISCSI_OK; 1841} 1842 1843static void 1844cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1845{ 1846 struct ctl_iscsi_limits_params *cilp; 1847 int error; 1848 1849 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1850 1851 error = icl_limits(cilp->offload, &cilp->data_segment_limit); 1852 if (error != 0) { 1853 ci->status = CTL_ISCSI_ERROR; 1854 snprintf(ci->error_str, sizeof(ci->error_str), 1855 "%s: icl_limits failed with error %d", 1856 __func__, error); 1857 return; 1858 } 1859 1860 ci->status = CTL_ISCSI_OK; 1861} 1862 1863#ifdef ICL_KERNEL_PROXY 1864static void 1865cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1866{ 1867 struct ctl_iscsi_listen_params *cilp; 1868 struct sockaddr *sa; 1869 int error; 1870 1871 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1872 1873 if (cfiscsi_softc.listener == NULL) { 1874 CFISCSI_DEBUG("no listener"); 1875 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1876 ci->status = CTL_ISCSI_ERROR; 1877 return; 1878 } 1879 1880 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1881 if (error != 0) { 1882 CFISCSI_DEBUG("getsockaddr, error %d", error); 1883 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1884 ci->status = CTL_ISCSI_ERROR; 1885 return; 1886 } 1887 1888 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1889 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1890 if (error != 0) { 1891 free(sa, M_SONAME); 1892 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1893 snprintf(ci->error_str, sizeof(ci->error_str), 1894 "icl_listen_add failed, error %d", error); 1895 ci->status = CTL_ISCSI_ERROR; 1896 return; 1897 } 1898 1899 ci->status = CTL_ISCSI_OK; 1900} 1901 1902static void 1903cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1904{ 1905 struct ctl_iscsi_accept_params *ciap; 1906 struct cfiscsi_session *cs; 1907 int error; 1908 1909 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1910 1911 mtx_lock(&cfiscsi_softc.lock); 1912 for (;;) { 1913 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1914 if (cs->cs_waiting_for_ctld) 1915 break; 1916 } 1917 if (cs != NULL) 1918 break; 1919 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1920 if (error != 0) { 1921 mtx_unlock(&cfiscsi_softc.lock); 1922 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1923 ci->status = CTL_ISCSI_ERROR; 1924 return; 1925 } 1926 } 1927 mtx_unlock(&cfiscsi_softc.lock); 1928 1929 cs->cs_waiting_for_ctld = false; 1930 cs->cs_login_phase = true; 1931 1932 ciap->connection_id = cs->cs_id; 1933 ciap->portal_id = cs->cs_portal_id; 1934 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1935 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1936 cs->cs_initiator_sa->sa_len); 1937 if (error != 0) { 1938 snprintf(ci->error_str, sizeof(ci->error_str), 1939 "copyout failed with error %d", error); 1940 ci->status = CTL_ISCSI_ERROR; 1941 return; 1942 } 1943 1944 ci->status = CTL_ISCSI_OK; 1945} 1946 1947static void 1948cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1949{ 1950 struct ctl_iscsi_send_params *cisp; 1951 struct cfiscsi_session *cs; 1952 struct icl_pdu *ip; 1953 size_t datalen; 1954 void *data; 1955 int error; 1956 1957 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1958 1959 mtx_lock(&cfiscsi_softc.lock); 1960 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1961 if (cs->cs_id == cisp->connection_id) 1962 break; 1963 } 1964 if (cs == NULL) { 1965 mtx_unlock(&cfiscsi_softc.lock); 1966 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1967 ci->status = CTL_ISCSI_ERROR; 1968 return; 1969 } 1970 mtx_unlock(&cfiscsi_softc.lock); 1971 1972#if 0 1973 if (cs->cs_login_phase == false) 1974 return (EBUSY); 1975#endif 1976 1977 if (cs->cs_terminating) { 1978 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1979 ci->status = CTL_ISCSI_ERROR; 1980 return; 1981 } 1982 1983 datalen = cisp->data_segment_len; 1984 /* 1985 * XXX 1986 */ 1987 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1988 if (datalen > 65535) { 1989 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1990 ci->status = CTL_ISCSI_ERROR; 1991 return; 1992 } 1993 if (datalen > 0) { 1994 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1995 error = copyin(cisp->data_segment, data, datalen); 1996 if (error != 0) { 1997 free(data, M_CFISCSI); 1998 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1999 ci->status = CTL_ISCSI_ERROR; 2000 return; 2001 } 2002 } 2003 2004 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 2005 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 2006 if (datalen > 0) { 2007 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 2008 free(data, M_CFISCSI); 2009 } 2010 CFISCSI_SESSION_LOCK(cs); 2011 icl_pdu_queue(ip); 2012 CFISCSI_SESSION_UNLOCK(cs); 2013 ci->status = CTL_ISCSI_OK; 2014} 2015 2016static void 2017cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 2018{ 2019 struct ctl_iscsi_receive_params *cirp; 2020 struct cfiscsi_session *cs; 2021 struct icl_pdu *ip; 2022 void *data; 2023 int error; 2024 2025 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2026 2027 mtx_lock(&cfiscsi_softc.lock); 2028 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2029 if (cs->cs_id == cirp->connection_id) 2030 break; 2031 } 2032 if (cs == NULL) { 2033 mtx_unlock(&cfiscsi_softc.lock); 2034 snprintf(ci->error_str, sizeof(ci->error_str), 2035 "connection not found"); 2036 ci->status = CTL_ISCSI_ERROR; 2037 return; 2038 } 2039 mtx_unlock(&cfiscsi_softc.lock); 2040 2041#if 0 2042 if (is->is_login_phase == false) 2043 return (EBUSY); 2044#endif 2045 2046 CFISCSI_SESSION_LOCK(cs); 2047 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2048 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2049 if (error != 0) { 2050 CFISCSI_SESSION_UNLOCK(cs); 2051 snprintf(ci->error_str, sizeof(ci->error_str), 2052 "interrupted by signal"); 2053 ci->status = CTL_ISCSI_ERROR; 2054 return; 2055 } 2056 } 2057 2058 if (cs->cs_terminating) { 2059 CFISCSI_SESSION_UNLOCK(cs); 2060 snprintf(ci->error_str, sizeof(ci->error_str), 2061 "connection terminating"); 2062 ci->status = CTL_ISCSI_ERROR; 2063 return; 2064 } 2065 ip = cs->cs_login_pdu; 2066 cs->cs_login_pdu = NULL; 2067 CFISCSI_SESSION_UNLOCK(cs); 2068 2069 if (ip->ip_data_len > cirp->data_segment_len) { 2070 icl_pdu_free(ip); 2071 snprintf(ci->error_str, sizeof(ci->error_str), 2072 "data segment too big"); 2073 ci->status = CTL_ISCSI_ERROR; 2074 return; 2075 } 2076 2077 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2078 if (ip->ip_data_len > 0) { 2079 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2080 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2081 copyout(data, cirp->data_segment, ip->ip_data_len); 2082 free(data, M_CFISCSI); 2083 } 2084 2085 icl_pdu_free(ip); 2086 ci->status = CTL_ISCSI_OK; 2087} 2088 2089#endif /* !ICL_KERNEL_PROXY */ 2090 2091static void 2092cfiscsi_ioctl_port_create(struct ctl_req *req) 2093{ 2094 struct cfiscsi_target *ct; 2095 struct ctl_port *port; 2096 const char *target, *alias, *tags; 2097 struct scsi_vpd_id_descriptor *desc; 2098 ctl_options_t opts; 2099 int retval, len, idlen; 2100 uint16_t tag; 2101 2102 ctl_init_opts(&opts, req->num_args, req->kern_args); 2103 target = ctl_get_opt(&opts, "cfiscsi_target"); 2104 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2105 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2106 if (target == NULL || tags == NULL) { 2107 req->status = CTL_LUN_ERROR; 2108 snprintf(req->error_str, sizeof(req->error_str), 2109 "Missing required argument"); 2110 ctl_free_opts(&opts); 2111 return; 2112 } 2113 tag = strtol(tags, (char **)NULL, 10); 2114 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2115 if (ct == NULL) { 2116 req->status = CTL_LUN_ERROR; 2117 snprintf(req->error_str, sizeof(req->error_str), 2118 "failed to create target \"%s\"", target); 2119 ctl_free_opts(&opts); 2120 return; 2121 } 2122 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2123 req->status = CTL_LUN_ERROR; 2124 snprintf(req->error_str, sizeof(req->error_str), 2125 "target \"%s\" already exists", target); 2126 cfiscsi_target_release(ct); 2127 ctl_free_opts(&opts); 2128 return; 2129 } 2130 port = &ct->ct_port; 2131 // WAT 2132 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2133 goto done; 2134 2135 port->frontend = &cfiscsi_frontend; 2136 port->port_type = CTL_PORT_ISCSI; 2137 /* XXX KDM what should the real number be here? */ 2138 port->num_requested_ctl_io = 4096; 2139 port->port_name = "iscsi"; 2140 port->physical_port = tag; 2141 port->virtual_port = ct->ct_target_id; 2142 port->port_online = cfiscsi_online; 2143 port->port_offline = cfiscsi_offline; 2144 port->port_info = cfiscsi_info; 2145 port->onoff_arg = ct; 2146 port->fe_datamove = cfiscsi_datamove; 2147 port->fe_done = cfiscsi_done; 2148 2149 /* XXX KDM what should we report here? */ 2150 /* XXX These should probably be fetched from CTL. */ 2151 port->max_targets = 1; 2152 port->max_target_id = 15; 2153 port->targ_port = -1; 2154 2155 port->options = opts; 2156 STAILQ_INIT(&opts); 2157 2158 /* Generate Port ID. */ 2159 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2160 idlen = roundup2(idlen, 4); 2161 len = sizeof(struct scsi_vpd_device_id) + idlen; 2162 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2163 M_CTL, M_WAITOK | M_ZERO); 2164 port->port_devid->len = len; 2165 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2166 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2167 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2168 SVPD_ID_TYPE_SCSI_NAME; 2169 desc->length = idlen; 2170 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2171 2172 /* Generate Target ID. */ 2173 idlen = strlen(target) + 1; 2174 idlen = roundup2(idlen, 4); 2175 len = sizeof(struct scsi_vpd_device_id) + idlen; 2176 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2177 M_CTL, M_WAITOK | M_ZERO); 2178 port->target_devid->len = len; 2179 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2180 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2181 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2182 SVPD_ID_TYPE_SCSI_NAME; 2183 desc->length = idlen; 2184 strlcpy(desc->identifier, target, idlen); 2185 2186 retval = ctl_port_register(port); 2187 if (retval != 0) { 2188 ctl_free_opts(&port->options); 2189 cfiscsi_target_release(ct); 2190 free(port->port_devid, M_CFISCSI); 2191 free(port->target_devid, M_CFISCSI); 2192 req->status = CTL_LUN_ERROR; 2193 snprintf(req->error_str, sizeof(req->error_str), 2194 "ctl_port_register() failed with error %d", retval); 2195 return; 2196 } 2197done: 2198 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2199 req->status = CTL_LUN_OK; 2200 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2201 sizeof(port->targ_port)); //XXX 2202} 2203 2204static void 2205cfiscsi_ioctl_port_remove(struct ctl_req *req) 2206{ 2207 struct cfiscsi_target *ct; 2208 const char *target, *tags; 2209 ctl_options_t opts; 2210 uint16_t tag; 2211 2212 ctl_init_opts(&opts, req->num_args, req->kern_args); 2213 target = ctl_get_opt(&opts, "cfiscsi_target"); 2214 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2215 if (target == NULL || tags == NULL) { 2216 ctl_free_opts(&opts); 2217 req->status = CTL_LUN_ERROR; 2218 snprintf(req->error_str, sizeof(req->error_str), 2219 "Missing required argument"); 2220 return; 2221 } 2222 tag = strtol(tags, (char **)NULL, 10); 2223 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2224 if (ct == NULL) { 2225 ctl_free_opts(&opts); 2226 req->status = CTL_LUN_ERROR; 2227 snprintf(req->error_str, sizeof(req->error_str), 2228 "can't find target \"%s\"", target); 2229 return; 2230 } 2231 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2232 ctl_free_opts(&opts); 2233 req->status = CTL_LUN_ERROR; 2234 snprintf(req->error_str, sizeof(req->error_str), 2235 "target \"%s\" is already dying", target); 2236 return; 2237 } 2238 ctl_free_opts(&opts); 2239 2240 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2241 ctl_port_offline(&ct->ct_port); 2242 cfiscsi_target_release(ct); 2243 cfiscsi_target_release(ct); 2244 req->status = CTL_LUN_OK; 2245} 2246 2247static int 2248cfiscsi_ioctl(struct cdev *dev, 2249 u_long cmd, caddr_t addr, int flag, struct thread *td) 2250{ 2251 struct ctl_iscsi *ci; 2252 struct ctl_req *req; 2253 2254 if (cmd == CTL_PORT_REQ) { 2255 req = (struct ctl_req *)addr; 2256 switch (req->reqtype) { 2257 case CTL_REQ_CREATE: 2258 cfiscsi_ioctl_port_create(req); 2259 break; 2260 case CTL_REQ_REMOVE: 2261 cfiscsi_ioctl_port_remove(req); 2262 break; 2263 default: 2264 req->status = CTL_LUN_ERROR; 2265 snprintf(req->error_str, sizeof(req->error_str), 2266 "Unsupported request type %d", req->reqtype); 2267 } 2268 return (0); 2269 } 2270 2271 if (cmd != CTL_ISCSI) 2272 return (ENOTTY); 2273 2274 ci = (struct ctl_iscsi *)addr; 2275 switch (ci->type) { 2276 case CTL_ISCSI_HANDOFF: 2277 cfiscsi_ioctl_handoff(ci); 2278 break; 2279 case CTL_ISCSI_LIST: 2280 cfiscsi_ioctl_list(ci); 2281 break; 2282 case CTL_ISCSI_LOGOUT: 2283 cfiscsi_ioctl_logout(ci); 2284 break; 2285 case CTL_ISCSI_TERMINATE: 2286 cfiscsi_ioctl_terminate(ci); 2287 break; 2288 case CTL_ISCSI_LIMITS: 2289 cfiscsi_ioctl_limits(ci); 2290 break; 2291#ifdef ICL_KERNEL_PROXY 2292 case CTL_ISCSI_LISTEN: 2293 cfiscsi_ioctl_listen(ci); 2294 break; 2295 case CTL_ISCSI_ACCEPT: 2296 cfiscsi_ioctl_accept(ci); 2297 break; 2298 case CTL_ISCSI_SEND: 2299 cfiscsi_ioctl_send(ci); 2300 break; 2301 case CTL_ISCSI_RECEIVE: 2302 cfiscsi_ioctl_receive(ci); 2303 break; 2304#else 2305 case CTL_ISCSI_LISTEN: 2306 case CTL_ISCSI_ACCEPT: 2307 case CTL_ISCSI_SEND: 2308 case CTL_ISCSI_RECEIVE: 2309 ci->status = CTL_ISCSI_ERROR; 2310 snprintf(ci->error_str, sizeof(ci->error_str), 2311 "%s: CTL compiled without ICL_KERNEL_PROXY", 2312 __func__); 2313 break; 2314#endif /* !ICL_KERNEL_PROXY */ 2315 default: 2316 ci->status = CTL_ISCSI_ERROR; 2317 snprintf(ci->error_str, sizeof(ci->error_str), 2318 "%s: invalid iSCSI request type %d", __func__, ci->type); 2319 break; 2320 } 2321 2322 return (0); 2323} 2324 2325static void 2326cfiscsi_target_hold(struct cfiscsi_target *ct) 2327{ 2328 2329 refcount_acquire(&ct->ct_refcount); 2330} 2331 2332static void 2333cfiscsi_target_release(struct cfiscsi_target *ct) 2334{ 2335 struct cfiscsi_softc *softc; 2336 2337 softc = ct->ct_softc; 2338 mtx_lock(&softc->lock); 2339 if (refcount_release(&ct->ct_refcount)) { 2340 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2341 mtx_unlock(&softc->lock); 2342 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2343 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2344 if (ctl_port_deregister(&ct->ct_port) != 0) 2345 printf("%s: ctl_port_deregister() failed\n", 2346 __func__); 2347 } 2348 free(ct, M_CFISCSI); 2349 2350 return; 2351 } 2352 mtx_unlock(&softc->lock); 2353} 2354 2355static struct cfiscsi_target * 2356cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2357{ 2358 struct cfiscsi_target *ct; 2359 2360 mtx_lock(&softc->lock); 2361 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2362 if (ct->ct_tag != tag || 2363 strcmp(name, ct->ct_name) != 0 || 2364 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2365 continue; 2366 cfiscsi_target_hold(ct); 2367 mtx_unlock(&softc->lock); 2368 return (ct); 2369 } 2370 mtx_unlock(&softc->lock); 2371 2372 return (NULL); 2373} 2374 2375static struct cfiscsi_target * 2376cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2377 const char *alias, uint16_t tag) 2378{ 2379 struct cfiscsi_target *ct, *newct; 2380 2381 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2382 return (NULL); 2383 2384 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2385 2386 mtx_lock(&softc->lock); 2387 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2388 if (ct->ct_tag != tag || 2389 strcmp(name, ct->ct_name) != 0 || 2390 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2391 continue; 2392 cfiscsi_target_hold(ct); 2393 mtx_unlock(&softc->lock); 2394 free(newct, M_CFISCSI); 2395 return (ct); 2396 } 2397 2398 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2399 if (alias != NULL) 2400 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2401 newct->ct_tag = tag; 2402 refcount_init(&newct->ct_refcount, 1); 2403 newct->ct_softc = softc; 2404 if (TAILQ_EMPTY(&softc->targets)) 2405 softc->last_target_id = 0; 2406 newct->ct_target_id = ++softc->last_target_id; 2407 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2408 mtx_unlock(&softc->lock); 2409 2410 return (newct); 2411} 2412 2413static void 2414cfiscsi_datamove_in(union ctl_io *io) 2415{ 2416 struct cfiscsi_session *cs; 2417 struct icl_pdu *request, *response; 2418 const struct iscsi_bhs_scsi_command *bhssc; 2419 struct iscsi_bhs_data_in *bhsdi; 2420 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2421 size_t len, expected_len, sg_len, buffer_offset; 2422 const char *sg_addr; 2423 int ctl_sg_count, error, i; 2424 2425 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2426 cs = PDU_SESSION(request); 2427 2428 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2429 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2430 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2431 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2432 2433 if (io->scsiio.kern_sg_entries > 0) { 2434 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2435 ctl_sg_count = io->scsiio.kern_sg_entries; 2436 } else { 2437 ctl_sglist = &ctl_sg_entry; 2438 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2439 ctl_sglist->len = io->scsiio.kern_data_len; 2440 ctl_sg_count = 1; 2441 } 2442 2443 /* 2444 * This is the total amount of data to be transferred within the current 2445 * SCSI command. We need to record it so that we can properly report 2446 * underflow/underflow. 2447 */ 2448 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2449 2450 /* 2451 * This is the offset within the current SCSI command; for the first 2452 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2453 * it will be the sum of lengths of previous ones. 2454 */ 2455 buffer_offset = io->scsiio.kern_rel_offset; 2456 2457 /* 2458 * This is the transfer length expected by the initiator. In theory, 2459 * it could be different from the correct amount of data from the SCSI 2460 * point of view, even if that doesn't make any sense. 2461 */ 2462 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2463#if 0 2464 if (expected_len != io->scsiio.kern_total_len) { 2465 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2466 "actual length %zd", expected_len, 2467 (size_t)io->scsiio.kern_total_len); 2468 } 2469#endif 2470 2471 if (buffer_offset >= expected_len) { 2472#if 0 2473 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2474 "already sent the expected len", buffer_offset); 2475#endif 2476 io->scsiio.be_move_done(io); 2477 return; 2478 } 2479 2480 i = 0; 2481 sg_addr = NULL; 2482 sg_len = 0; 2483 response = NULL; 2484 bhsdi = NULL; 2485 for (;;) { 2486 if (response == NULL) { 2487 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2488 if (response == NULL) { 2489 CFISCSI_SESSION_WARN(cs, "failed to " 2490 "allocate memory; dropping connection"); 2491 ctl_set_busy(&io->scsiio); 2492 io->scsiio.be_move_done(io); 2493 cfiscsi_session_terminate(cs); 2494 return; 2495 } 2496 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2497 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2498 bhsdi->bhsdi_initiator_task_tag = 2499 bhssc->bhssc_initiator_task_tag; 2500 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2501 PDU_EXPDATASN(request)++; 2502 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2503 } 2504 2505 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2506 if (sg_len == 0) { 2507 sg_addr = ctl_sglist[i].addr; 2508 sg_len = ctl_sglist[i].len; 2509 KASSERT(sg_len > 0, ("sg_len <= 0")); 2510 } 2511 2512 len = sg_len; 2513 2514 /* 2515 * Truncate to maximum data segment length. 2516 */ 2517 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2518 ("ip_data_len %zd >= max_data_segment_length %zd", 2519 response->ip_data_len, cs->cs_max_data_segment_length)); 2520 if (response->ip_data_len + len > 2521 cs->cs_max_data_segment_length) { 2522 len = cs->cs_max_data_segment_length - 2523 response->ip_data_len; 2524 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2525 len, sg_len)); 2526 } 2527 2528 /* 2529 * Truncate to expected data transfer length. 2530 */ 2531 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2532 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2533 buffer_offset, response->ip_data_len, expected_len)); 2534 if (buffer_offset + response->ip_data_len + len > expected_len) { 2535 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2536 "to expected data transfer length %zd", 2537 buffer_offset + response->ip_data_len + len, expected_len); 2538 len = expected_len - (buffer_offset + response->ip_data_len); 2539 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2540 len, sg_len)); 2541 } 2542 2543 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2544 if (error != 0) { 2545 CFISCSI_SESSION_WARN(cs, "failed to " 2546 "allocate memory; dropping connection"); 2547 icl_pdu_free(response); 2548 ctl_set_busy(&io->scsiio); 2549 io->scsiio.be_move_done(io); 2550 cfiscsi_session_terminate(cs); 2551 return; 2552 } 2553 sg_addr += len; 2554 sg_len -= len; 2555 2556 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2557 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2558 buffer_offset, response->ip_data_len, expected_len)); 2559 if (buffer_offset + response->ip_data_len == expected_len) { 2560 /* 2561 * Already have the amount of data the initiator wanted. 2562 */ 2563 break; 2564 } 2565 2566 if (sg_len == 0) { 2567 /* 2568 * End of scatter-gather segment; 2569 * proceed to the next one... 2570 */ 2571 if (i == ctl_sg_count - 1) { 2572 /* 2573 * ... unless this was the last one. 2574 */ 2575 break; 2576 } 2577 i++; 2578 } 2579 2580 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2581 /* 2582 * Can't stuff more data into the current PDU; 2583 * queue it. Note that's not enough to check 2584 * for kern_data_resid == 0 instead; there 2585 * may be several Data-In PDUs for the final 2586 * call to cfiscsi_datamove(), and we want 2587 * to set the F flag only on the last of them. 2588 */ 2589 buffer_offset += response->ip_data_len; 2590 if (buffer_offset == io->scsiio.kern_total_len || 2591 buffer_offset == expected_len) { 2592 buffer_offset -= response->ip_data_len; 2593 break; 2594 } 2595 cfiscsi_pdu_queue(response); 2596 response = NULL; 2597 bhsdi = NULL; 2598 } 2599 } 2600 if (response != NULL) { 2601 buffer_offset += response->ip_data_len; 2602 if (buffer_offset == io->scsiio.kern_total_len || 2603 buffer_offset == expected_len) { 2604 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2605 if (io->io_hdr.status == CTL_SUCCESS) { 2606 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2607 if (PDU_TOTAL_TRANSFER_LEN(request) < 2608 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2609 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2610 bhsdi->bhsdi_residual_count = 2611 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2612 PDU_TOTAL_TRANSFER_LEN(request)); 2613 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2614 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2615 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2616 bhsdi->bhsdi_residual_count = 2617 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2618 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2619 } 2620 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2621 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2622 } 2623 } 2624 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2625 cfiscsi_pdu_queue(response); 2626 } 2627 2628 io->scsiio.be_move_done(io); 2629} 2630 2631static void 2632cfiscsi_datamove_out(union ctl_io *io) 2633{ 2634 struct cfiscsi_session *cs; 2635 struct icl_pdu *request, *response; 2636 const struct iscsi_bhs_scsi_command *bhssc; 2637 struct iscsi_bhs_r2t *bhsr2t; 2638 struct cfiscsi_data_wait *cdw; 2639 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2640 uint32_t expected_len, r2t_off, r2t_len; 2641 uint32_t target_transfer_tag; 2642 bool done; 2643 2644 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2645 cs = PDU_SESSION(request); 2646 2647 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2648 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2649 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2650 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2651 2652 /* 2653 * We need to record it so that we can properly report 2654 * underflow/underflow. 2655 */ 2656 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2657 2658 /* 2659 * Report write underflow as error since CTL and backends don't 2660 * really support it, and SCSI does not tell how to do it right. 2661 */ 2662 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2663 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2664 expected_len) { 2665 io->scsiio.io_hdr.port_status = 43; 2666 io->scsiio.be_move_done(io); 2667 return; 2668 } 2669 2670 target_transfer_tag = 2671 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2672 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2673 &target_transfer_tag); 2674 if (cdw == NULL) { 2675 CFISCSI_SESSION_WARN(cs, "failed to " 2676 "allocate memory; dropping connection"); 2677 ctl_set_busy(&io->scsiio); 2678 io->scsiio.be_move_done(io); 2679 cfiscsi_session_terminate(cs); 2680 return; 2681 } 2682#if 0 2683 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2684 "task tag 0x%x, target transfer tag 0x%x", 2685 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2686#endif 2687 2688 cdw->cdw_ctl_io = io; 2689 cdw->cdw_target_transfer_tag = target_transfer_tag; 2690 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2691 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2692 cdw->cdw_datasn = 0; 2693 2694 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2695 if (io->scsiio.kern_sg_entries > 0) { 2696 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2697 } else { 2698 ctl_sglist = &ctl_sg_entry; 2699 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2700 ctl_sglist->len = io->scsiio.kern_data_len; 2701 } 2702 cdw->cdw_sg_index = 0; 2703 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2704 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2705 r2t_off = io->scsiio.ext_data_filled; 2706 while (r2t_off > 0) { 2707 if (r2t_off >= cdw->cdw_sg_len) { 2708 r2t_off -= cdw->cdw_sg_len; 2709 cdw->cdw_sg_index++; 2710 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2711 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2712 continue; 2713 } 2714 cdw->cdw_sg_addr += r2t_off; 2715 cdw->cdw_sg_len -= r2t_off; 2716 r2t_off = 0; 2717 } 2718 2719 if (cs->cs_immediate_data && 2720 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2721 icl_pdu_data_segment_length(request)) { 2722 done = cfiscsi_handle_data_segment(request, cdw); 2723 if (done) { 2724 cfiscsi_data_wait_free(cs, cdw); 2725 io->scsiio.be_move_done(io); 2726 return; 2727 } 2728 } 2729 2730 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2731 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2732 cs->cs_max_burst_length); 2733 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2734 2735 CFISCSI_SESSION_LOCK(cs); 2736 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2737 CFISCSI_SESSION_UNLOCK(cs); 2738 2739 /* 2740 * XXX: We should limit the number of outstanding R2T PDUs 2741 * per task to MaxOutstandingR2T. 2742 */ 2743 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2744 if (response == NULL) { 2745 CFISCSI_SESSION_WARN(cs, "failed to " 2746 "allocate memory; dropping connection"); 2747 ctl_set_busy(&io->scsiio); 2748 io->scsiio.be_move_done(io); 2749 cfiscsi_session_terminate(cs); 2750 return; 2751 } 2752 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2753 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2754 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2755 bhsr2t->bhsr2t_flags = 0x80; 2756 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2757 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2758 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2759 /* 2760 * XXX: Here we assume that cfiscsi_datamove() won't ever 2761 * be running concurrently on several CPUs for a given 2762 * command. 2763 */ 2764 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2765 PDU_R2TSN(request)++; 2766 /* 2767 * This is the offset within the current SCSI command; 2768 * i.e. for the first call of datamove(), it will be 0, 2769 * and for subsequent ones it will be the sum of lengths 2770 * of previous ones. 2771 * 2772 * The ext_data_filled is to account for unsolicited 2773 * (immediate) data that might have already arrived. 2774 */ 2775 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2776 /* 2777 * This is the total length (sum of S/G lengths) this call 2778 * to cfiscsi_datamove() is supposed to handle, limited by 2779 * MaxBurstLength. 2780 */ 2781 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2782 cfiscsi_pdu_queue(response); 2783} 2784 2785static void 2786cfiscsi_datamove(union ctl_io *io) 2787{ 2788 2789 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2790 cfiscsi_datamove_in(io); 2791 else { 2792 /* We hadn't received anything during this datamove yet. */ 2793 io->scsiio.ext_data_filled = 0; 2794 cfiscsi_datamove_out(io); 2795 } 2796} 2797 2798static void 2799cfiscsi_scsi_command_done(union ctl_io *io) 2800{ 2801 struct icl_pdu *request, *response; 2802 struct iscsi_bhs_scsi_command *bhssc; 2803 struct iscsi_bhs_scsi_response *bhssr; 2804#ifdef DIAGNOSTIC 2805 struct cfiscsi_data_wait *cdw; 2806#endif 2807 struct cfiscsi_session *cs; 2808 uint16_t sense_length; 2809 2810 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2811 cs = PDU_SESSION(request); 2812 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2813 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2814 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2815 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2816 2817 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2818 // bhssc->bhssc_initiator_task_tag); 2819 2820#ifdef DIAGNOSTIC 2821 CFISCSI_SESSION_LOCK(cs); 2822 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2823 KASSERT(bhssc->bhssc_initiator_task_tag != 2824 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2825 CFISCSI_SESSION_UNLOCK(cs); 2826#endif 2827 2828 /* 2829 * Do not return status for aborted commands. 2830 * There are exceptions, but none supported by CTL yet. 2831 */ 2832 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2833 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2834 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2835 ctl_free_io(io); 2836 icl_pdu_free(request); 2837 return; 2838 } 2839 2840 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2841 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2842 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2843 bhssr->bhssr_flags = 0x80; 2844 /* 2845 * XXX: We don't deal with bidirectional under/overflows; 2846 * does anything actually support those? 2847 */ 2848 if (PDU_TOTAL_TRANSFER_LEN(request) < 2849 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2850 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2851 bhssr->bhssr_residual_count = 2852 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2853 PDU_TOTAL_TRANSFER_LEN(request)); 2854 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2855 // ntohl(bhssr->bhssr_residual_count)); 2856 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2857 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2858 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2859 bhssr->bhssr_residual_count = 2860 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2861 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2862 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2863 // ntohl(bhssr->bhssr_residual_count)); 2864 } 2865 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2866 bhssr->bhssr_status = io->scsiio.scsi_status; 2867 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2868 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2869 2870 if (io->scsiio.sense_len > 0) { 2871#if 0 2872 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2873 io->scsiio.sense_len); 2874#endif 2875 sense_length = htons(io->scsiio.sense_len); 2876 icl_pdu_append_data(response, 2877 &sense_length, sizeof(sense_length), M_WAITOK); 2878 icl_pdu_append_data(response, 2879 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2880 } 2881 2882 ctl_free_io(io); 2883 icl_pdu_free(request); 2884 cfiscsi_pdu_queue(response); 2885} 2886 2887static void 2888cfiscsi_task_management_done(union ctl_io *io) 2889{ 2890 struct icl_pdu *request, *response; 2891 struct iscsi_bhs_task_management_request *bhstmr; 2892 struct iscsi_bhs_task_management_response *bhstmr2; 2893 struct cfiscsi_data_wait *cdw, *tmpcdw; 2894 struct cfiscsi_session *cs, *tcs; 2895 struct cfiscsi_softc *softc; 2896 int cold_reset = 0; 2897 2898 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2899 cs = PDU_SESSION(request); 2900 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2901 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2902 ISCSI_BHS_OPCODE_TASK_REQUEST, 2903 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2904 2905#if 0 2906 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2907 bhstmr->bhstmr_initiator_task_tag, 2908 bhstmr->bhstmr_referenced_task_tag); 2909#endif 2910 2911 if ((bhstmr->bhstmr_function & ~0x80) == 2912 BHSTMR_FUNCTION_ABORT_TASK) { 2913 /* 2914 * Make sure we no longer wait for Data-Out for this command. 2915 */ 2916 CFISCSI_SESSION_LOCK(cs); 2917 TAILQ_FOREACH_SAFE(cdw, 2918 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2919 if (bhstmr->bhstmr_referenced_task_tag != 2920 cdw->cdw_initiator_task_tag) 2921 continue; 2922 2923#if 0 2924 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2925 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2926#endif 2927 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2928 cdw, cdw_next); 2929 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2930 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2931 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2932 cfiscsi_data_wait_free(cs, cdw); 2933 } 2934 CFISCSI_SESSION_UNLOCK(cs); 2935 } 2936 if ((bhstmr->bhstmr_function & ~0x80) == 2937 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2938 io->io_hdr.status == CTL_SUCCESS) 2939 cold_reset = 1; 2940 2941 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2942 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2943 response->ip_bhs; 2944 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2945 bhstmr2->bhstmr_flags = 0x80; 2946 switch (io->taskio.task_status) { 2947 case CTL_TASK_FUNCTION_COMPLETE: 2948 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2949 break; 2950 case CTL_TASK_FUNCTION_SUCCEEDED: 2951 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2952 break; 2953 case CTL_TASK_LUN_DOES_NOT_EXIST: 2954 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2955 break; 2956 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2957 default: 2958 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2959 break; 2960 } 2961 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2962 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2963 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2964 2965 ctl_free_io(io); 2966 icl_pdu_free(request); 2967 cfiscsi_pdu_queue(response); 2968 2969 if (cold_reset) { 2970 softc = cs->cs_target->ct_softc; 2971 mtx_lock(&softc->lock); 2972 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2973 if (tcs->cs_target == cs->cs_target) 2974 cfiscsi_session_terminate(tcs); 2975 } 2976 mtx_unlock(&softc->lock); 2977 } 2978} 2979 2980static void 2981cfiscsi_done(union ctl_io *io) 2982{ 2983 struct icl_pdu *request; 2984 struct cfiscsi_session *cs; 2985 2986 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2987 ("invalid CTL status %#x", io->io_hdr.status)); 2988 2989 if (io->io_hdr.io_type == CTL_IO_TASK && 2990 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2991 /* 2992 * Implicit task termination has just completed; nothing to do. 2993 */ 2994 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2995 cs->cs_tasks_aborted = true; 2996 refcount_release(&cs->cs_outstanding_ctl_pdus); 2997 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2998 ctl_free_io(io); 2999 return; 3000 } 3001 3002 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 3003 cs = PDU_SESSION(request); 3004 refcount_release(&cs->cs_outstanding_ctl_pdus); 3005 3006 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 3007 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 3008 cfiscsi_scsi_command_done(io); 3009 break; 3010 case ISCSI_BHS_OPCODE_TASK_REQUEST: 3011 cfiscsi_task_management_done(io); 3012 break; 3013 default: 3014 panic("cfiscsi_done called with wrong opcode 0x%x", 3015 request->ip_bhs->bhs_opcode); 3016 } 3017} 3018