ctl_frontend_iscsi.c revision 288221
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 288221 2015-09-25 18:15:34Z 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 288221 2015-09-25 18:15:34Z 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 break; 465 default: 466 CFISCSI_WARN("unsupported LUN format 0x%jx", 467 (uintmax_t)encoded); 468 result = 0xffffffff; 469 break; 470 } 471 472 return (result); 473} 474 475static void 476cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 477{ 478 struct cfiscsi_session *cs; 479 struct iscsi_bhs_nop_out *bhsno; 480 struct iscsi_bhs_nop_in *bhsni; 481 struct icl_pdu *response; 482 void *data = NULL; 483 size_t datasize; 484 int error; 485 486 cs = PDU_SESSION(request); 487 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 488 489 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 490 /* 491 * Nothing to do, iscsi_pdu_update_statsn() already 492 * zeroed the timeout. 493 */ 494 icl_pdu_free(request); 495 return; 496 } 497 498 datasize = icl_pdu_data_segment_length(request); 499 if (datasize > 0) { 500 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 501 if (data == NULL) { 502 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 503 "dropping connection"); 504 icl_pdu_free(request); 505 cfiscsi_session_terminate(cs); 506 return; 507 } 508 icl_pdu_get_data(request, 0, data, datasize); 509 } 510 511 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 512 if (response == NULL) { 513 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 514 "droppping connection"); 515 free(data, M_CFISCSI); 516 icl_pdu_free(request); 517 cfiscsi_session_terminate(cs); 518 return; 519 } 520 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 521 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 522 bhsni->bhsni_flags = 0x80; 523 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 524 bhsni->bhsni_target_transfer_tag = 0xffffffff; 525 if (datasize > 0) { 526 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 527 if (error != 0) { 528 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 529 "dropping connection"); 530 free(data, M_CFISCSI); 531 icl_pdu_free(request); 532 icl_pdu_free(response); 533 cfiscsi_session_terminate(cs); 534 return; 535 } 536 free(data, M_CFISCSI); 537 } 538 539 icl_pdu_free(request); 540 cfiscsi_pdu_queue(response); 541} 542 543static void 544cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 545{ 546 struct iscsi_bhs_scsi_command *bhssc; 547 struct cfiscsi_session *cs; 548 union ctl_io *io; 549 int error; 550 551 cs = PDU_SESSION(request); 552 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 553 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 554 // bhssc->bhssc_initiator_task_tag); 555 556 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 557 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 558 "ImmediateData=No; dropping connection"); 559 icl_pdu_free(request); 560 cfiscsi_session_terminate(cs); 561 return; 562 } 563 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 564 ctl_zero_io(io); 565 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 566 io->io_hdr.io_type = CTL_IO_SCSI; 567 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 568 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 569 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 570 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 571 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 572 case BHSSC_FLAGS_ATTR_UNTAGGED: 573 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 574 break; 575 case BHSSC_FLAGS_ATTR_SIMPLE: 576 io->scsiio.tag_type = CTL_TAG_SIMPLE; 577 break; 578 case BHSSC_FLAGS_ATTR_ORDERED: 579 io->scsiio.tag_type = CTL_TAG_ORDERED; 580 break; 581 case BHSSC_FLAGS_ATTR_HOQ: 582 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 583 break; 584 case BHSSC_FLAGS_ATTR_ACA: 585 io->scsiio.tag_type = CTL_TAG_ACA; 586 break; 587 default: 588 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 589 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 590 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 591 break; 592 } 593 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 594 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 595 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 596 error = ctl_queue(io); 597 if (error != CTL_RETVAL_COMPLETE) { 598 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 599 "dropping connection", error); 600 ctl_free_io(io); 601 refcount_release(&cs->cs_outstanding_ctl_pdus); 602 icl_pdu_free(request); 603 cfiscsi_session_terminate(cs); 604 } 605} 606 607static void 608cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 609{ 610 struct iscsi_bhs_task_management_request *bhstmr; 611 struct iscsi_bhs_task_management_response *bhstmr2; 612 struct icl_pdu *response; 613 struct cfiscsi_session *cs; 614 union ctl_io *io; 615 int error; 616 617 cs = PDU_SESSION(request); 618 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 619 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 620 ctl_zero_io(io); 621 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 622 io->io_hdr.io_type = CTL_IO_TASK; 623 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 624 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 625 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 626 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 627 628 switch (bhstmr->bhstmr_function & ~0x80) { 629 case BHSTMR_FUNCTION_ABORT_TASK: 630#if 0 631 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 632#endif 633 io->taskio.task_action = CTL_TASK_ABORT_TASK; 634 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 635 break; 636 case BHSTMR_FUNCTION_ABORT_TASK_SET: 637#if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 639#endif 640 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 641 break; 642 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 643#if 0 644 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 645#endif 646 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 647 break; 648 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 649#if 0 650 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 651#endif 652 io->taskio.task_action = CTL_TASK_LUN_RESET; 653 break; 654 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 655#if 0 656 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 657#endif 658 io->taskio.task_action = CTL_TASK_TARGET_RESET; 659 break; 660 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 661#if 0 662 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 663#endif 664 io->taskio.task_action = CTL_TASK_TARGET_RESET; 665 break; 666 case BHSTMR_FUNCTION_QUERY_TASK: 667#if 0 668 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 669#endif 670 io->taskio.task_action = CTL_TASK_QUERY_TASK; 671 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 672 break; 673 case BHSTMR_FUNCTION_QUERY_TASK_SET: 674#if 0 675 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 676#endif 677 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 678 break; 679 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 680#if 0 681 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 682#endif 683 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 684 break; 685 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 686#if 0 687 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 688#endif 689 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 690 break; 691 default: 692 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 693 bhstmr->bhstmr_function & ~0x80); 694 ctl_free_io(io); 695 696 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 697 if (response == NULL) { 698 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 699 "dropping connection"); 700 icl_pdu_free(request); 701 cfiscsi_session_terminate(cs); 702 return; 703 } 704 bhstmr2 = (struct iscsi_bhs_task_management_response *) 705 response->ip_bhs; 706 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 707 bhstmr2->bhstmr_flags = 0x80; 708 bhstmr2->bhstmr_response = 709 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 710 bhstmr2->bhstmr_initiator_task_tag = 711 bhstmr->bhstmr_initiator_task_tag; 712 icl_pdu_free(request); 713 cfiscsi_pdu_queue(response); 714 return; 715 } 716 717 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 718 error = ctl_queue(io); 719 if (error != CTL_RETVAL_COMPLETE) { 720 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 721 "dropping connection", error); 722 ctl_free_io(io); 723 refcount_release(&cs->cs_outstanding_ctl_pdus); 724 icl_pdu_free(request); 725 cfiscsi_session_terminate(cs); 726 } 727} 728 729static bool 730cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 731{ 732 struct iscsi_bhs_data_out *bhsdo; 733 struct cfiscsi_session *cs; 734 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 735 size_t copy_len, len, off, buffer_offset; 736 int ctl_sg_count; 737 union ctl_io *io; 738 739 cs = PDU_SESSION(request); 740 741 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 742 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 743 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 744 ISCSI_BHS_OPCODE_SCSI_COMMAND, 745 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 746 747 /* 748 * We're only using fields common for Data-Out and SCSI Command PDUs. 749 */ 750 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 751 752 io = cdw->cdw_ctl_io; 753 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 754 ("CTL_FLAG_DATA_IN")); 755 756#if 0 757 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 758 request->ip_data_len, io->scsiio.kern_total_len); 759#endif 760 761 if (io->scsiio.kern_sg_entries > 0) { 762 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 763 ctl_sg_count = io->scsiio.kern_sg_entries; 764 } else { 765 ctl_sglist = &ctl_sg_entry; 766 ctl_sglist->addr = io->scsiio.kern_data_ptr; 767 ctl_sglist->len = io->scsiio.kern_data_len; 768 ctl_sg_count = 1; 769 } 770 771 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 772 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 773 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 774 else 775 buffer_offset = 0; 776 len = icl_pdu_data_segment_length(request); 777 778 /* 779 * Make sure the offset, as sent by the initiator, matches the offset 780 * we're supposed to be at in the scatter-gather list. 781 */ 782 if (buffer_offset > 783 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 784 buffer_offset + len <= 785 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 786 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 787 "expected %zd; dropping connection", buffer_offset, 788 (size_t)io->scsiio.kern_rel_offset + 789 (size_t)io->scsiio.ext_data_filled); 790 ctl_set_data_phase_error(&io->scsiio); 791 cfiscsi_session_terminate(cs); 792 return (true); 793 } 794 795 /* 796 * This is the offset within the PDU data segment, as opposed 797 * to buffer_offset, which is the offset within the task (SCSI 798 * command). 799 */ 800 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 801 buffer_offset; 802 803 /* 804 * Iterate over the scatter/gather segments, filling them with data 805 * from the PDU data segment. Note that this can get called multiple 806 * times for one SCSI command; the cdw structure holds state for the 807 * scatter/gather list. 808 */ 809 for (;;) { 810 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 811 ("cdw->cdw_sg_index >= ctl_sg_count")); 812 if (cdw->cdw_sg_len == 0) { 813 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 814 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 815 } 816 KASSERT(off <= len, ("len > off")); 817 copy_len = len - off; 818 if (copy_len > cdw->cdw_sg_len) 819 copy_len = cdw->cdw_sg_len; 820 821 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 822 cdw->cdw_sg_addr += copy_len; 823 cdw->cdw_sg_len -= copy_len; 824 off += copy_len; 825 io->scsiio.ext_data_filled += copy_len; 826 827 if (cdw->cdw_sg_len == 0) { 828 /* 829 * End of current segment. 830 */ 831 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 832 /* 833 * Last segment in scatter/gather list. 834 */ 835 break; 836 } 837 cdw->cdw_sg_index++; 838 } 839 840 if (off == len) { 841 /* 842 * End of PDU payload. 843 */ 844 break; 845 } 846 } 847 848 if (len > off) { 849 /* 850 * In case of unsolicited data, it's possible that the buffer 851 * provided by CTL is smaller than negotiated FirstBurstLength. 852 * Just ignore the superfluous data; will ask for them with R2T 853 * on next call to cfiscsi_datamove(). 854 * 855 * This obviously can only happen with SCSI Command PDU. 856 */ 857 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 858 ISCSI_BHS_OPCODE_SCSI_COMMAND) 859 return (true); 860 861 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 862 "expected %zd; dropping connection", 863 icl_pdu_data_segment_length(request), off); 864 ctl_set_data_phase_error(&io->scsiio); 865 cfiscsi_session_terminate(cs); 866 return (true); 867 } 868 869 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 870 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 871 CFISCSI_SESSION_WARN(cs, "got the final packet without " 872 "the F flag; flags = 0x%x; dropping connection", 873 bhsdo->bhsdo_flags); 874 ctl_set_data_phase_error(&io->scsiio); 875 cfiscsi_session_terminate(cs); 876 return (true); 877 } 878 879 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 880 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 881 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 882 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 883 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 884 "transmitted size was %zd bytes instead of %d; " 885 "dropping connection", 886 (size_t)io->scsiio.ext_data_filled, 887 cdw->cdw_r2t_end); 888 ctl_set_data_phase_error(&io->scsiio); 889 cfiscsi_session_terminate(cs); 890 return (true); 891 } else { 892 /* 893 * For SCSI Command PDU, this just means we need to 894 * solicit more data by sending R2T. 895 */ 896 return (false); 897 } 898 } 899 900 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 901#if 0 902 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 903 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 904#endif 905 906 return (true); 907 } 908 909 return (false); 910} 911 912static void 913cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 914{ 915 struct iscsi_bhs_data_out *bhsdo; 916 struct cfiscsi_session *cs; 917 struct cfiscsi_data_wait *cdw = NULL; 918 union ctl_io *io; 919 bool done; 920 921 cs = PDU_SESSION(request); 922 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 923 924 CFISCSI_SESSION_LOCK(cs); 925 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 926#if 0 927 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 928 "ttt 0x%x, itt 0x%x", 929 bhsdo->bhsdo_target_transfer_tag, 930 bhsdo->bhsdo_initiator_task_tag, 931 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 932#endif 933 if (bhsdo->bhsdo_target_transfer_tag == 934 cdw->cdw_target_transfer_tag) 935 break; 936 } 937 CFISCSI_SESSION_UNLOCK(cs); 938 if (cdw == NULL) { 939 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 940 "0x%x, not found; dropping connection", 941 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 942 icl_pdu_free(request); 943 cfiscsi_session_terminate(cs); 944 return; 945 } 946 947 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 948 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 949 "DataSN %u, while expected %u; dropping connection", 950 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 951 icl_pdu_free(request); 952 cfiscsi_session_terminate(cs); 953 return; 954 } 955 cdw->cdw_datasn++; 956 957 io = cdw->cdw_ctl_io; 958 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 959 ("CTL_FLAG_DATA_IN")); 960 961 done = cfiscsi_handle_data_segment(request, cdw); 962 if (done) { 963 CFISCSI_SESSION_LOCK(cs); 964 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 965 CFISCSI_SESSION_UNLOCK(cs); 966 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 967 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 968 cfiscsi_data_wait_free(cs, cdw); 969 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 970 if (done) 971 io->scsiio.be_move_done(io); 972 else 973 cfiscsi_datamove_out(io); 974 } 975 976 icl_pdu_free(request); 977} 978 979static void 980cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 981{ 982 struct iscsi_bhs_logout_request *bhslr; 983 struct iscsi_bhs_logout_response *bhslr2; 984 struct icl_pdu *response; 985 struct cfiscsi_session *cs; 986 987 cs = PDU_SESSION(request); 988 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 989 switch (bhslr->bhslr_reason & 0x7f) { 990 case BHSLR_REASON_CLOSE_SESSION: 991 case BHSLR_REASON_CLOSE_CONNECTION: 992 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 993 if (response == NULL) { 994 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 995 icl_pdu_free(request); 996 cfiscsi_session_terminate(cs); 997 return; 998 } 999 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 1000 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 1001 bhslr2->bhslr_flags = 0x80; 1002 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 1003 bhslr2->bhslr_initiator_task_tag = 1004 bhslr->bhslr_initiator_task_tag; 1005 icl_pdu_free(request); 1006 cfiscsi_pdu_queue(response); 1007 cfiscsi_session_terminate(cs); 1008 break; 1009 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 1010 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 1011 if (response == NULL) { 1012 CFISCSI_SESSION_WARN(cs, 1013 "failed to allocate memory; dropping connection"); 1014 icl_pdu_free(request); 1015 cfiscsi_session_terminate(cs); 1016 return; 1017 } 1018 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 1019 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 1020 bhslr2->bhslr_flags = 0x80; 1021 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 1022 bhslr2->bhslr_initiator_task_tag = 1023 bhslr->bhslr_initiator_task_tag; 1024 icl_pdu_free(request); 1025 cfiscsi_pdu_queue(response); 1026 break; 1027 default: 1028 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 1029 bhslr->bhslr_reason); 1030 icl_pdu_free(request); 1031 cfiscsi_session_terminate(cs); 1032 break; 1033 } 1034} 1035 1036static void 1037cfiscsi_callout(void *context) 1038{ 1039 struct icl_pdu *cp; 1040 struct iscsi_bhs_nop_in *bhsni; 1041 struct cfiscsi_session *cs; 1042 1043 cs = context; 1044 1045 if (cs->cs_terminating) 1046 return; 1047 1048 callout_schedule(&cs->cs_callout, 1 * hz); 1049 1050 atomic_add_int(&cs->cs_timeout, 1); 1051 1052#ifdef ICL_KERNEL_PROXY 1053 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1054 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1055 CFISCSI_SESSION_WARN(cs, "login timed out after " 1056 "%d seconds; dropping connection", cs->cs_timeout); 1057 cfiscsi_session_terminate(cs); 1058 } 1059 return; 1060 } 1061#endif 1062 1063 if (ping_timeout <= 0) { 1064 /* 1065 * Pings are disabled. Don't send NOP-In in this case; 1066 * user might have disabled pings to work around problems 1067 * with certain initiators that can't properly handle 1068 * NOP-In, such as iPXE. Reset the timeout, to avoid 1069 * triggering reconnection, should the user decide to 1070 * reenable them. 1071 */ 1072 cs->cs_timeout = 0; 1073 return; 1074 } 1075 1076 if (cs->cs_timeout >= ping_timeout) { 1077 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1078 "dropping connection", ping_timeout); 1079 cfiscsi_session_terminate(cs); 1080 return; 1081 } 1082 1083 /* 1084 * If the ping was reset less than one second ago - which means 1085 * that we've received some PDU during the last second - assume 1086 * the traffic flows correctly and don't bother sending a NOP-Out. 1087 * 1088 * (It's 2 - one for one second, and one for incrementing is_timeout 1089 * earlier in this routine.) 1090 */ 1091 if (cs->cs_timeout < 2) 1092 return; 1093 1094 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1095 if (cp == NULL) { 1096 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1097 return; 1098 } 1099 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1100 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1101 bhsni->bhsni_flags = 0x80; 1102 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1103 1104 cfiscsi_pdu_queue(cp); 1105} 1106 1107static struct cfiscsi_data_wait * 1108cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1109 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1110{ 1111 struct cfiscsi_data_wait *cdw; 1112 int error; 1113 1114 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1115 if (cdw == NULL) { 1116 CFISCSI_SESSION_WARN(cs, 1117 "failed to allocate %zd bytes", sizeof(*cdw)); 1118 return (NULL); 1119 } 1120 1121 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1122 &cdw->cdw_icl_prv); 1123 if (error != 0) { 1124 CFISCSI_SESSION_WARN(cs, 1125 "icl_conn_transfer_setup() failed with error %d", error); 1126 uma_zfree(cfiscsi_data_wait_zone, cdw); 1127 return (NULL); 1128 } 1129 1130 cdw->cdw_ctl_io = io; 1131 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1132 cdw->cdw_initiator_task_tag = initiator_task_tag; 1133 1134 return (cdw); 1135} 1136 1137static void 1138cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1139 struct cfiscsi_data_wait *cdw) 1140{ 1141 1142 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1143 uma_zfree(cfiscsi_data_wait_zone, cdw); 1144} 1145 1146static void 1147cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1148{ 1149 struct cfiscsi_data_wait *cdw; 1150 union ctl_io *io; 1151 int error, last, wait; 1152 1153 if (cs->cs_target == NULL) 1154 return; /* No target yet, so nothing to do. */ 1155 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1156 ctl_zero_io(io); 1157 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1158 io->io_hdr.io_type = CTL_IO_TASK; 1159 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1160 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1161 io->io_hdr.nexus.targ_lun = 0; 1162 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1163 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1164 wait = cs->cs_outstanding_ctl_pdus; 1165 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1166 error = ctl_queue(io); 1167 if (error != CTL_RETVAL_COMPLETE) { 1168 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1169 refcount_release(&cs->cs_outstanding_ctl_pdus); 1170 ctl_free_io(io); 1171 } 1172 1173 CFISCSI_SESSION_LOCK(cs); 1174 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1175 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1176 CFISCSI_SESSION_UNLOCK(cs); 1177 /* 1178 * Set nonzero port status; this prevents backends from 1179 * assuming that the data transfer actually succeeded 1180 * and writing uninitialized data to disk. 1181 */ 1182 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1183 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1184 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1185 cfiscsi_data_wait_free(cs, cdw); 1186 CFISCSI_SESSION_LOCK(cs); 1187 } 1188 CFISCSI_SESSION_UNLOCK(cs); 1189 1190 /* 1191 * Wait for CTL to terminate all the tasks. 1192 */ 1193 if (wait > 0) 1194 CFISCSI_SESSION_WARN(cs, 1195 "waiting for CTL to terminate %d tasks", wait); 1196 for (;;) { 1197 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1198 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1199 if (last != 0) 1200 break; 1201 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1202 0, "cfiscsi_terminate", hz / 100); 1203 } 1204 if (wait > 0) 1205 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1206} 1207 1208static void 1209cfiscsi_maintenance_thread(void *arg) 1210{ 1211 struct cfiscsi_session *cs; 1212 1213 cs = arg; 1214 1215 for (;;) { 1216 CFISCSI_SESSION_LOCK(cs); 1217 if (cs->cs_terminating == false) 1218 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1219 CFISCSI_SESSION_UNLOCK(cs); 1220 1221 if (cs->cs_terminating) { 1222 1223 /* 1224 * We used to wait up to 30 seconds to deliver queued 1225 * PDUs to the initiator. We also tried hard to deliver 1226 * SCSI Responses for the aborted PDUs. We don't do 1227 * that anymore. We might need to revisit that. 1228 */ 1229 callout_drain(&cs->cs_callout); 1230 icl_conn_close(cs->cs_conn); 1231 1232 /* 1233 * At this point ICL receive thread is no longer 1234 * running; no new tasks can be queued. 1235 */ 1236 cfiscsi_session_terminate_tasks(cs); 1237 cfiscsi_session_delete(cs); 1238 kthread_exit(); 1239 return; 1240 } 1241 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1242 } 1243} 1244 1245static void 1246cfiscsi_session_terminate(struct cfiscsi_session *cs) 1247{ 1248 1249 if (cs->cs_terminating) 1250 return; 1251 cs->cs_terminating = true; 1252 cv_signal(&cs->cs_maintenance_cv); 1253#ifdef ICL_KERNEL_PROXY 1254 cv_signal(&cs->cs_login_cv); 1255#endif 1256} 1257 1258static int 1259cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1260{ 1261 struct cfiscsi_target *ct; 1262 char *name; 1263 int i; 1264 1265 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1266 1267 ct = cs->cs_target; 1268 name = strdup(cs->cs_initiator_id, M_CTL); 1269 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1270 if (i < 0) { 1271 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1272 i); 1273 cs->cs_ctl_initid = -1; 1274 return (1); 1275 } 1276 cs->cs_ctl_initid = i; 1277#if 0 1278 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1279#endif 1280 1281 return (0); 1282} 1283 1284static void 1285cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1286{ 1287 int error; 1288 1289 if (cs->cs_ctl_initid == -1) 1290 return; 1291 1292 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1293 if (error != 0) { 1294 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1295 error); 1296 } 1297 cs->cs_ctl_initid = -1; 1298} 1299 1300static struct cfiscsi_session * 1301cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1302{ 1303 struct cfiscsi_session *cs; 1304 int error; 1305 1306 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1307 if (cs == NULL) { 1308 CFISCSI_WARN("malloc failed"); 1309 return (NULL); 1310 } 1311 cs->cs_ctl_initid = -1; 1312 1313 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1314 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1315 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1316 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1317#ifdef ICL_KERNEL_PROXY 1318 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1319#endif 1320 1321 cs->cs_conn = icl_new_conn(offload, "cfiscsi", &cs->cs_lock); 1322 if (cs->cs_conn == NULL) { 1323 free(cs, M_CFISCSI); 1324 return (NULL); 1325 } 1326 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1327 cs->cs_conn->ic_error = cfiscsi_error_callback; 1328 cs->cs_conn->ic_prv0 = cs; 1329 1330 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1331 if (error != 0) { 1332 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1333 free(cs, M_CFISCSI); 1334 return (NULL); 1335 } 1336 1337 mtx_lock(&softc->lock); 1338 cs->cs_id = ++softc->last_session_id; 1339 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1340 mtx_unlock(&softc->lock); 1341 1342 /* 1343 * Start pinging the initiator. 1344 */ 1345 callout_init(&cs->cs_callout, 1); 1346 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1347 1348 return (cs); 1349} 1350 1351static void 1352cfiscsi_session_delete(struct cfiscsi_session *cs) 1353{ 1354 struct cfiscsi_softc *softc; 1355 1356 softc = &cfiscsi_softc; 1357 1358 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1359 ("destroying session with outstanding CTL pdus")); 1360 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1361 ("destroying session with non-empty queue")); 1362 1363 cfiscsi_session_unregister_initiator(cs); 1364 if (cs->cs_target != NULL) 1365 cfiscsi_target_release(cs->cs_target); 1366 icl_conn_close(cs->cs_conn); 1367 icl_conn_free(cs->cs_conn); 1368 1369 mtx_lock(&softc->lock); 1370 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1371 cv_signal(&softc->sessions_cv); 1372 mtx_unlock(&softc->lock); 1373 1374 free(cs, M_CFISCSI); 1375} 1376 1377int 1378cfiscsi_init(void) 1379{ 1380 struct cfiscsi_softc *softc; 1381 1382 softc = &cfiscsi_softc; 1383 bzero(softc, sizeof(*softc)); 1384 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1385 1386 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1387#ifdef ICL_KERNEL_PROXY 1388 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1389#endif 1390 TAILQ_INIT(&softc->sessions); 1391 TAILQ_INIT(&softc->targets); 1392 1393 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1394 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1395 UMA_ALIGN_PTR, 0); 1396 1397 return (0); 1398} 1399 1400#ifdef ICL_KERNEL_PROXY 1401static void 1402cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1403{ 1404 struct cfiscsi_session *cs; 1405 1406 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1407 if (cs == NULL) { 1408 CFISCSI_WARN("failed to create session"); 1409 return; 1410 } 1411 1412 icl_conn_handoff_sock(cs->cs_conn, so); 1413 cs->cs_initiator_sa = sa; 1414 cs->cs_portal_id = portal_id; 1415 cs->cs_waiting_for_ctld = true; 1416 cv_signal(&cfiscsi_softc.accept_cv); 1417} 1418#endif 1419 1420static void 1421cfiscsi_online(void *arg) 1422{ 1423 struct cfiscsi_softc *softc; 1424 struct cfiscsi_target *ct; 1425 int online; 1426 1427 ct = (struct cfiscsi_target *)arg; 1428 softc = ct->ct_softc; 1429 1430 mtx_lock(&softc->lock); 1431 if (ct->ct_online) { 1432 mtx_unlock(&softc->lock); 1433 return; 1434 } 1435 ct->ct_online = 1; 1436 online = softc->online++; 1437 mtx_unlock(&softc->lock); 1438 if (online > 0) 1439 return; 1440 1441#ifdef ICL_KERNEL_PROXY 1442 if (softc->listener != NULL) 1443 icl_listen_free(softc->listener); 1444 softc->listener = icl_listen_new(cfiscsi_accept); 1445#endif 1446} 1447 1448static void 1449cfiscsi_offline(void *arg) 1450{ 1451 struct cfiscsi_softc *softc; 1452 struct cfiscsi_target *ct; 1453 struct cfiscsi_session *cs; 1454 int online; 1455 1456 ct = (struct cfiscsi_target *)arg; 1457 softc = ct->ct_softc; 1458 1459 mtx_lock(&softc->lock); 1460 if (!ct->ct_online) { 1461 mtx_unlock(&softc->lock); 1462 return; 1463 } 1464 ct->ct_online = 0; 1465 online = --softc->online; 1466 1467 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1468 if (cs->cs_target == ct) 1469 cfiscsi_session_terminate(cs); 1470 } 1471 do { 1472 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1473 if (cs->cs_target == ct) 1474 break; 1475 } 1476 if (cs != NULL) 1477 cv_wait(&softc->sessions_cv, &softc->lock); 1478 } while (cs != NULL && ct->ct_online == 0); 1479 mtx_unlock(&softc->lock); 1480 if (online > 0) 1481 return; 1482 1483#ifdef ICL_KERNEL_PROXY 1484 icl_listen_free(softc->listener); 1485 softc->listener = NULL; 1486#endif 1487} 1488 1489static int 1490cfiscsi_info(void *arg, struct sbuf *sb) 1491{ 1492 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1493 int retval; 1494 1495 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1496 ct->ct_state); 1497 return (retval); 1498} 1499 1500static void 1501cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1502{ 1503 struct cfiscsi_softc *softc; 1504 struct cfiscsi_session *cs, *cs2; 1505 struct cfiscsi_target *ct; 1506 struct ctl_iscsi_handoff_params *cihp; 1507 int error; 1508 1509 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1510 softc = &cfiscsi_softc; 1511 1512 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1513 cihp->initiator_name, cihp->initiator_addr, 1514 cihp->target_name); 1515 1516 ct = cfiscsi_target_find(softc, cihp->target_name, 1517 cihp->portal_group_tag); 1518 if (ct == NULL) { 1519 ci->status = CTL_ISCSI_ERROR; 1520 snprintf(ci->error_str, sizeof(ci->error_str), 1521 "%s: target not found", __func__); 1522 return; 1523 } 1524 1525#ifdef ICL_KERNEL_PROXY 1526 if (cihp->socket > 0 && cihp->connection_id > 0) { 1527 snprintf(ci->error_str, sizeof(ci->error_str), 1528 "both socket and connection_id set"); 1529 ci->status = CTL_ISCSI_ERROR; 1530 cfiscsi_target_release(ct); 1531 return; 1532 } 1533 if (cihp->socket == 0) { 1534 mtx_lock(&cfiscsi_softc.lock); 1535 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1536 if (cs->cs_id == cihp->connection_id) 1537 break; 1538 } 1539 if (cs == NULL) { 1540 mtx_unlock(&cfiscsi_softc.lock); 1541 snprintf(ci->error_str, sizeof(ci->error_str), 1542 "connection not found"); 1543 ci->status = CTL_ISCSI_ERROR; 1544 cfiscsi_target_release(ct); 1545 return; 1546 } 1547 mtx_unlock(&cfiscsi_softc.lock); 1548 } else { 1549#endif 1550 cs = cfiscsi_session_new(softc, cihp->offload); 1551 if (cs == NULL) { 1552 ci->status = CTL_ISCSI_ERROR; 1553 snprintf(ci->error_str, sizeof(ci->error_str), 1554 "%s: cfiscsi_session_new failed", __func__); 1555 cfiscsi_target_release(ct); 1556 return; 1557 } 1558#ifdef ICL_KERNEL_PROXY 1559 } 1560#endif 1561 1562 /* 1563 * First PDU of Full Feature phase has the same CmdSN as the last 1564 * PDU from the Login Phase received from the initiator. Thus, 1565 * the -1 below. 1566 */ 1567 cs->cs_cmdsn = cihp->cmdsn; 1568 cs->cs_statsn = cihp->statsn; 1569 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1570 cs->cs_max_burst_length = cihp->max_burst_length; 1571 cs->cs_immediate_data = !!cihp->immediate_data; 1572 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1573 cs->cs_conn->ic_header_crc32c = true; 1574 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1575 cs->cs_conn->ic_data_crc32c = true; 1576 1577 strlcpy(cs->cs_initiator_name, 1578 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1579 strlcpy(cs->cs_initiator_addr, 1580 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1581 strlcpy(cs->cs_initiator_alias, 1582 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1583 memcpy(cs->cs_initiator_isid, 1584 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1585 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1586 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1587 cihp->initiator_isid[0], cihp->initiator_isid[1], 1588 cihp->initiator_isid[2], cihp->initiator_isid[3], 1589 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1590 1591 mtx_lock(&softc->lock); 1592 if (ct->ct_online == 0) { 1593 mtx_unlock(&softc->lock); 1594 cfiscsi_session_terminate(cs); 1595 cfiscsi_target_release(ct); 1596 ci->status = CTL_ISCSI_ERROR; 1597 snprintf(ci->error_str, sizeof(ci->error_str), 1598 "%s: port offline", __func__); 1599 return; 1600 } 1601 cs->cs_target = ct; 1602 mtx_unlock(&softc->lock); 1603 1604 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1605restart: 1606 if (!cs->cs_terminating) { 1607 mtx_lock(&softc->lock); 1608 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1609 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1610 cs->cs_target == cs2->cs_target && 1611 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1612 if (strcmp(cs->cs_initiator_addr, 1613 cs2->cs_initiator_addr) != 0) { 1614 CFISCSI_SESSION_WARN(cs2, 1615 "session reinstatement from " 1616 "different address %s", 1617 cs->cs_initiator_addr); 1618 } else { 1619 CFISCSI_SESSION_DEBUG(cs2, 1620 "session reinstatement"); 1621 } 1622 cfiscsi_session_terminate(cs2); 1623 mtx_unlock(&softc->lock); 1624 pause("cfiscsi_reinstate", 1); 1625 goto restart; 1626 } 1627 } 1628 mtx_unlock(&softc->lock); 1629 } 1630 1631 /* 1632 * Register initiator with CTL. 1633 */ 1634 cfiscsi_session_register_initiator(cs); 1635 1636#ifdef ICL_KERNEL_PROXY 1637 if (cihp->socket > 0) { 1638#endif 1639 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1640 if (error != 0) { 1641 cfiscsi_session_terminate(cs); 1642 refcount_release(&cs->cs_outstanding_ctl_pdus); 1643 ci->status = CTL_ISCSI_ERROR; 1644 snprintf(ci->error_str, sizeof(ci->error_str), 1645 "%s: icl_conn_handoff failed with error %d", 1646 __func__, error); 1647 return; 1648 } 1649#ifdef ICL_KERNEL_PROXY 1650 } 1651#endif 1652 1653#ifdef ICL_KERNEL_PROXY 1654 cs->cs_login_phase = false; 1655 1656 /* 1657 * First PDU of the Full Feature phase has likely already arrived. 1658 * We have to pick it up and execute properly. 1659 */ 1660 if (cs->cs_login_pdu != NULL) { 1661 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1662 cfiscsi_pdu_handle(cs->cs_login_pdu); 1663 cs->cs_login_pdu = NULL; 1664 } 1665#endif 1666 1667 refcount_release(&cs->cs_outstanding_ctl_pdus); 1668 ci->status = CTL_ISCSI_OK; 1669} 1670 1671static void 1672cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1673{ 1674 struct ctl_iscsi_list_params *cilp; 1675 struct cfiscsi_session *cs; 1676 struct cfiscsi_softc *softc; 1677 struct sbuf *sb; 1678 int error; 1679 1680 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1681 softc = &cfiscsi_softc; 1682 1683 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1684 if (sb == NULL) { 1685 ci->status = CTL_ISCSI_ERROR; 1686 snprintf(ci->error_str, sizeof(ci->error_str), 1687 "Unable to allocate %d bytes for iSCSI session list", 1688 cilp->alloc_len); 1689 return; 1690 } 1691 1692 sbuf_printf(sb, "<ctlislist>\n"); 1693 mtx_lock(&softc->lock); 1694 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1695#ifdef ICL_KERNEL_PROXY 1696 if (cs->cs_target == NULL) 1697 continue; 1698#endif 1699 error = sbuf_printf(sb, "<connection id=\"%d\">" 1700 "<initiator>%s</initiator>" 1701 "<initiator_addr>%s</initiator_addr>" 1702 "<initiator_alias>%s</initiator_alias>" 1703 "<target>%s</target>" 1704 "<target_alias>%s</target_alias>" 1705 "<target_portal_group_tag>%u</target_portal_group_tag>" 1706 "<header_digest>%s</header_digest>" 1707 "<data_digest>%s</data_digest>" 1708 "<max_data_segment_length>%zd</max_data_segment_length>" 1709 "<immediate_data>%d</immediate_data>" 1710 "<iser>%d</iser>" 1711 "<offload>%s</offload>" 1712 "</connection>\n", 1713 cs->cs_id, 1714 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1715 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1716 cs->cs_target->ct_tag, 1717 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1718 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1719 cs->cs_max_data_segment_length, 1720 cs->cs_immediate_data, 1721 cs->cs_conn->ic_iser, 1722 cs->cs_conn->ic_offload); 1723 if (error != 0) 1724 break; 1725 } 1726 mtx_unlock(&softc->lock); 1727 error = sbuf_printf(sb, "</ctlislist>\n"); 1728 if (error != 0) { 1729 sbuf_delete(sb); 1730 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1731 snprintf(ci->error_str, sizeof(ci->error_str), 1732 "Out of space, %d bytes is too small", cilp->alloc_len); 1733 return; 1734 } 1735 sbuf_finish(sb); 1736 1737 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1738 cilp->fill_len = sbuf_len(sb) + 1; 1739 ci->status = CTL_ISCSI_OK; 1740 sbuf_delete(sb); 1741} 1742 1743static void 1744cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1745{ 1746 struct icl_pdu *response; 1747 struct iscsi_bhs_asynchronous_message *bhsam; 1748 struct ctl_iscsi_logout_params *cilp; 1749 struct cfiscsi_session *cs; 1750 struct cfiscsi_softc *softc; 1751 int found = 0; 1752 1753 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1754 softc = &cfiscsi_softc; 1755 1756 mtx_lock(&softc->lock); 1757 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1758 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1759 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1760 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1761 continue; 1762 1763 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1764 if (response == NULL) { 1765 ci->status = CTL_ISCSI_ERROR; 1766 snprintf(ci->error_str, sizeof(ci->error_str), 1767 "Unable to allocate memory"); 1768 mtx_unlock(&softc->lock); 1769 return; 1770 } 1771 bhsam = 1772 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1773 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1774 bhsam->bhsam_flags = 0x80; 1775 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1776 bhsam->bhsam_parameter3 = htons(10); 1777 cfiscsi_pdu_queue(response); 1778 found++; 1779 } 1780 mtx_unlock(&softc->lock); 1781 1782 if (found == 0) { 1783 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1784 snprintf(ci->error_str, sizeof(ci->error_str), 1785 "No matching connections found"); 1786 return; 1787 } 1788 1789 ci->status = CTL_ISCSI_OK; 1790} 1791 1792static void 1793cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1794{ 1795 struct icl_pdu *response; 1796 struct iscsi_bhs_asynchronous_message *bhsam; 1797 struct ctl_iscsi_terminate_params *citp; 1798 struct cfiscsi_session *cs; 1799 struct cfiscsi_softc *softc; 1800 int found = 0; 1801 1802 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1803 softc = &cfiscsi_softc; 1804 1805 mtx_lock(&softc->lock); 1806 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1807 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1808 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1809 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1810 continue; 1811 1812 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1813 if (response == NULL) { 1814 /* 1815 * Oh well. Just terminate the connection. 1816 */ 1817 } else { 1818 bhsam = (struct iscsi_bhs_asynchronous_message *) 1819 response->ip_bhs; 1820 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1821 bhsam->bhsam_flags = 0x80; 1822 bhsam->bhsam_0xffffffff = 0xffffffff; 1823 bhsam->bhsam_async_event = 1824 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1825 cfiscsi_pdu_queue(response); 1826 } 1827 cfiscsi_session_terminate(cs); 1828 found++; 1829 } 1830 mtx_unlock(&softc->lock); 1831 1832 if (found == 0) { 1833 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1834 snprintf(ci->error_str, sizeof(ci->error_str), 1835 "No matching connections found"); 1836 return; 1837 } 1838 1839 ci->status = CTL_ISCSI_OK; 1840} 1841 1842static void 1843cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1844{ 1845 struct ctl_iscsi_limits_params *cilp; 1846 int error; 1847 1848 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1849 1850 error = icl_limits(cilp->offload, &cilp->data_segment_limit); 1851 if (error != 0) { 1852 ci->status = CTL_ISCSI_ERROR; 1853 snprintf(ci->error_str, sizeof(ci->error_str), 1854 "%s: icl_limits failed with error %d", 1855 __func__, error); 1856 return; 1857 } 1858 1859 ci->status = CTL_ISCSI_OK; 1860} 1861 1862#ifdef ICL_KERNEL_PROXY 1863static void 1864cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1865{ 1866 struct ctl_iscsi_listen_params *cilp; 1867 struct sockaddr *sa; 1868 int error; 1869 1870 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1871 1872 if (cfiscsi_softc.listener == NULL) { 1873 CFISCSI_DEBUG("no listener"); 1874 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1875 ci->status = CTL_ISCSI_ERROR; 1876 return; 1877 } 1878 1879 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1880 if (error != 0) { 1881 CFISCSI_DEBUG("getsockaddr, error %d", error); 1882 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1883 ci->status = CTL_ISCSI_ERROR; 1884 return; 1885 } 1886 1887 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1888 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1889 if (error != 0) { 1890 free(sa, M_SONAME); 1891 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1892 snprintf(ci->error_str, sizeof(ci->error_str), 1893 "icl_listen_add failed, error %d", error); 1894 ci->status = CTL_ISCSI_ERROR; 1895 return; 1896 } 1897 1898 ci->status = CTL_ISCSI_OK; 1899} 1900 1901static void 1902cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1903{ 1904 struct ctl_iscsi_accept_params *ciap; 1905 struct cfiscsi_session *cs; 1906 int error; 1907 1908 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1909 1910 mtx_lock(&cfiscsi_softc.lock); 1911 for (;;) { 1912 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1913 if (cs->cs_waiting_for_ctld) 1914 break; 1915 } 1916 if (cs != NULL) 1917 break; 1918 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1919 if (error != 0) { 1920 mtx_unlock(&cfiscsi_softc.lock); 1921 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1922 ci->status = CTL_ISCSI_ERROR; 1923 return; 1924 } 1925 } 1926 mtx_unlock(&cfiscsi_softc.lock); 1927 1928 cs->cs_waiting_for_ctld = false; 1929 cs->cs_login_phase = true; 1930 1931 ciap->connection_id = cs->cs_id; 1932 ciap->portal_id = cs->cs_portal_id; 1933 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1934 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1935 cs->cs_initiator_sa->sa_len); 1936 if (error != 0) { 1937 snprintf(ci->error_str, sizeof(ci->error_str), 1938 "copyout failed with error %d", error); 1939 ci->status = CTL_ISCSI_ERROR; 1940 return; 1941 } 1942 1943 ci->status = CTL_ISCSI_OK; 1944} 1945 1946static void 1947cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1948{ 1949 struct ctl_iscsi_send_params *cisp; 1950 struct cfiscsi_session *cs; 1951 struct icl_pdu *ip; 1952 size_t datalen; 1953 void *data; 1954 int error; 1955 1956 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1957 1958 mtx_lock(&cfiscsi_softc.lock); 1959 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1960 if (cs->cs_id == cisp->connection_id) 1961 break; 1962 } 1963 if (cs == NULL) { 1964 mtx_unlock(&cfiscsi_softc.lock); 1965 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1966 ci->status = CTL_ISCSI_ERROR; 1967 return; 1968 } 1969 mtx_unlock(&cfiscsi_softc.lock); 1970 1971#if 0 1972 if (cs->cs_login_phase == false) 1973 return (EBUSY); 1974#endif 1975 1976 if (cs->cs_terminating) { 1977 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1978 ci->status = CTL_ISCSI_ERROR; 1979 return; 1980 } 1981 1982 datalen = cisp->data_segment_len; 1983 /* 1984 * XXX 1985 */ 1986 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1987 if (datalen > 65535) { 1988 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1989 ci->status = CTL_ISCSI_ERROR; 1990 return; 1991 } 1992 if (datalen > 0) { 1993 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1994 error = copyin(cisp->data_segment, data, datalen); 1995 if (error != 0) { 1996 free(data, M_CFISCSI); 1997 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1998 ci->status = CTL_ISCSI_ERROR; 1999 return; 2000 } 2001 } 2002 2003 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 2004 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 2005 if (datalen > 0) { 2006 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 2007 free(data, M_CFISCSI); 2008 } 2009 CFISCSI_SESSION_LOCK(cs); 2010 icl_pdu_queue(ip); 2011 CFISCSI_SESSION_UNLOCK(cs); 2012 ci->status = CTL_ISCSI_OK; 2013} 2014 2015static void 2016cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 2017{ 2018 struct ctl_iscsi_receive_params *cirp; 2019 struct cfiscsi_session *cs; 2020 struct icl_pdu *ip; 2021 void *data; 2022 int error; 2023 2024 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2025 2026 mtx_lock(&cfiscsi_softc.lock); 2027 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2028 if (cs->cs_id == cirp->connection_id) 2029 break; 2030 } 2031 if (cs == NULL) { 2032 mtx_unlock(&cfiscsi_softc.lock); 2033 snprintf(ci->error_str, sizeof(ci->error_str), 2034 "connection not found"); 2035 ci->status = CTL_ISCSI_ERROR; 2036 return; 2037 } 2038 mtx_unlock(&cfiscsi_softc.lock); 2039 2040#if 0 2041 if (is->is_login_phase == false) 2042 return (EBUSY); 2043#endif 2044 2045 CFISCSI_SESSION_LOCK(cs); 2046 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2047 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2048 if (error != 0) { 2049 CFISCSI_SESSION_UNLOCK(cs); 2050 snprintf(ci->error_str, sizeof(ci->error_str), 2051 "interrupted by signal"); 2052 ci->status = CTL_ISCSI_ERROR; 2053 return; 2054 } 2055 } 2056 2057 if (cs->cs_terminating) { 2058 CFISCSI_SESSION_UNLOCK(cs); 2059 snprintf(ci->error_str, sizeof(ci->error_str), 2060 "connection terminating"); 2061 ci->status = CTL_ISCSI_ERROR; 2062 return; 2063 } 2064 ip = cs->cs_login_pdu; 2065 cs->cs_login_pdu = NULL; 2066 CFISCSI_SESSION_UNLOCK(cs); 2067 2068 if (ip->ip_data_len > cirp->data_segment_len) { 2069 icl_pdu_free(ip); 2070 snprintf(ci->error_str, sizeof(ci->error_str), 2071 "data segment too big"); 2072 ci->status = CTL_ISCSI_ERROR; 2073 return; 2074 } 2075 2076 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2077 if (ip->ip_data_len > 0) { 2078 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2079 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2080 copyout(data, cirp->data_segment, ip->ip_data_len); 2081 free(data, M_CFISCSI); 2082 } 2083 2084 icl_pdu_free(ip); 2085 ci->status = CTL_ISCSI_OK; 2086} 2087 2088#endif /* !ICL_KERNEL_PROXY */ 2089 2090static void 2091cfiscsi_ioctl_port_create(struct ctl_req *req) 2092{ 2093 struct cfiscsi_target *ct; 2094 struct ctl_port *port; 2095 const char *target, *alias, *tags; 2096 struct scsi_vpd_id_descriptor *desc; 2097 ctl_options_t opts; 2098 int retval, len, idlen; 2099 uint16_t tag; 2100 2101 ctl_init_opts(&opts, req->num_args, req->kern_args); 2102 target = ctl_get_opt(&opts, "cfiscsi_target"); 2103 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2104 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2105 if (target == NULL || tags == NULL) { 2106 req->status = CTL_LUN_ERROR; 2107 snprintf(req->error_str, sizeof(req->error_str), 2108 "Missing required argument"); 2109 ctl_free_opts(&opts); 2110 return; 2111 } 2112 tag = strtol(tags, (char **)NULL, 10); 2113 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2114 if (ct == NULL) { 2115 req->status = CTL_LUN_ERROR; 2116 snprintf(req->error_str, sizeof(req->error_str), 2117 "failed to create target \"%s\"", target); 2118 ctl_free_opts(&opts); 2119 return; 2120 } 2121 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2122 req->status = CTL_LUN_ERROR; 2123 snprintf(req->error_str, sizeof(req->error_str), 2124 "target \"%s\" already exists", target); 2125 cfiscsi_target_release(ct); 2126 ctl_free_opts(&opts); 2127 return; 2128 } 2129 port = &ct->ct_port; 2130 // WAT 2131 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2132 goto done; 2133 2134 port->frontend = &cfiscsi_frontend; 2135 port->port_type = CTL_PORT_ISCSI; 2136 /* XXX KDM what should the real number be here? */ 2137 port->num_requested_ctl_io = 4096; 2138 port->port_name = "iscsi"; 2139 port->physical_port = tag; 2140 port->virtual_port = ct->ct_target_id; 2141 port->port_online = cfiscsi_online; 2142 port->port_offline = cfiscsi_offline; 2143 port->port_info = cfiscsi_info; 2144 port->onoff_arg = ct; 2145 port->fe_datamove = cfiscsi_datamove; 2146 port->fe_done = cfiscsi_done; 2147 2148 /* XXX KDM what should we report here? */ 2149 /* XXX These should probably be fetched from CTL. */ 2150 port->max_targets = 1; 2151 port->max_target_id = 15; 2152 port->targ_port = -1; 2153 2154 port->options = opts; 2155 STAILQ_INIT(&opts); 2156 2157 /* Generate Port ID. */ 2158 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2159 idlen = roundup2(idlen, 4); 2160 len = sizeof(struct scsi_vpd_device_id) + idlen; 2161 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2162 M_CTL, M_WAITOK | M_ZERO); 2163 port->port_devid->len = len; 2164 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2165 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2166 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2167 SVPD_ID_TYPE_SCSI_NAME; 2168 desc->length = idlen; 2169 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2170 2171 /* Generate Target ID. */ 2172 idlen = strlen(target) + 1; 2173 idlen = roundup2(idlen, 4); 2174 len = sizeof(struct scsi_vpd_device_id) + idlen; 2175 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2176 M_CTL, M_WAITOK | M_ZERO); 2177 port->target_devid->len = len; 2178 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2179 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2180 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2181 SVPD_ID_TYPE_SCSI_NAME; 2182 desc->length = idlen; 2183 strlcpy(desc->identifier, target, idlen); 2184 2185 retval = ctl_port_register(port); 2186 if (retval != 0) { 2187 ctl_free_opts(&port->options); 2188 cfiscsi_target_release(ct); 2189 free(port->port_devid, M_CFISCSI); 2190 free(port->target_devid, M_CFISCSI); 2191 req->status = CTL_LUN_ERROR; 2192 snprintf(req->error_str, sizeof(req->error_str), 2193 "ctl_port_register() failed with error %d", retval); 2194 return; 2195 } 2196done: 2197 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2198 req->status = CTL_LUN_OK; 2199 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2200 sizeof(port->targ_port)); //XXX 2201} 2202 2203static void 2204cfiscsi_ioctl_port_remove(struct ctl_req *req) 2205{ 2206 struct cfiscsi_target *ct; 2207 const char *target, *tags; 2208 ctl_options_t opts; 2209 uint16_t tag; 2210 2211 ctl_init_opts(&opts, req->num_args, req->kern_args); 2212 target = ctl_get_opt(&opts, "cfiscsi_target"); 2213 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2214 if (target == NULL || tags == NULL) { 2215 ctl_free_opts(&opts); 2216 req->status = CTL_LUN_ERROR; 2217 snprintf(req->error_str, sizeof(req->error_str), 2218 "Missing required argument"); 2219 return; 2220 } 2221 tag = strtol(tags, (char **)NULL, 10); 2222 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2223 if (ct == NULL) { 2224 ctl_free_opts(&opts); 2225 req->status = CTL_LUN_ERROR; 2226 snprintf(req->error_str, sizeof(req->error_str), 2227 "can't find target \"%s\"", target); 2228 return; 2229 } 2230 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2231 ctl_free_opts(&opts); 2232 req->status = CTL_LUN_ERROR; 2233 snprintf(req->error_str, sizeof(req->error_str), 2234 "target \"%s\" is already dying", target); 2235 return; 2236 } 2237 ctl_free_opts(&opts); 2238 2239 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2240 ctl_port_offline(&ct->ct_port); 2241 cfiscsi_target_release(ct); 2242 cfiscsi_target_release(ct); 2243 req->status = CTL_LUN_OK; 2244} 2245 2246static int 2247cfiscsi_ioctl(struct cdev *dev, 2248 u_long cmd, caddr_t addr, int flag, struct thread *td) 2249{ 2250 struct ctl_iscsi *ci; 2251 struct ctl_req *req; 2252 2253 if (cmd == CTL_PORT_REQ) { 2254 req = (struct ctl_req *)addr; 2255 switch (req->reqtype) { 2256 case CTL_REQ_CREATE: 2257 cfiscsi_ioctl_port_create(req); 2258 break; 2259 case CTL_REQ_REMOVE: 2260 cfiscsi_ioctl_port_remove(req); 2261 break; 2262 default: 2263 req->status = CTL_LUN_ERROR; 2264 snprintf(req->error_str, sizeof(req->error_str), 2265 "Unsupported request type %d", req->reqtype); 2266 } 2267 return (0); 2268 } 2269 2270 if (cmd != CTL_ISCSI) 2271 return (ENOTTY); 2272 2273 ci = (struct ctl_iscsi *)addr; 2274 switch (ci->type) { 2275 case CTL_ISCSI_HANDOFF: 2276 cfiscsi_ioctl_handoff(ci); 2277 break; 2278 case CTL_ISCSI_LIST: 2279 cfiscsi_ioctl_list(ci); 2280 break; 2281 case CTL_ISCSI_LOGOUT: 2282 cfiscsi_ioctl_logout(ci); 2283 break; 2284 case CTL_ISCSI_TERMINATE: 2285 cfiscsi_ioctl_terminate(ci); 2286 break; 2287 case CTL_ISCSI_LIMITS: 2288 cfiscsi_ioctl_limits(ci); 2289 break; 2290#ifdef ICL_KERNEL_PROXY 2291 case CTL_ISCSI_LISTEN: 2292 cfiscsi_ioctl_listen(ci); 2293 break; 2294 case CTL_ISCSI_ACCEPT: 2295 cfiscsi_ioctl_accept(ci); 2296 break; 2297 case CTL_ISCSI_SEND: 2298 cfiscsi_ioctl_send(ci); 2299 break; 2300 case CTL_ISCSI_RECEIVE: 2301 cfiscsi_ioctl_receive(ci); 2302 break; 2303#else 2304 case CTL_ISCSI_LISTEN: 2305 case CTL_ISCSI_ACCEPT: 2306 case CTL_ISCSI_SEND: 2307 case CTL_ISCSI_RECEIVE: 2308 ci->status = CTL_ISCSI_ERROR; 2309 snprintf(ci->error_str, sizeof(ci->error_str), 2310 "%s: CTL compiled without ICL_KERNEL_PROXY", 2311 __func__); 2312 break; 2313#endif /* !ICL_KERNEL_PROXY */ 2314 default: 2315 ci->status = CTL_ISCSI_ERROR; 2316 snprintf(ci->error_str, sizeof(ci->error_str), 2317 "%s: invalid iSCSI request type %d", __func__, ci->type); 2318 break; 2319 } 2320 2321 return (0); 2322} 2323 2324static void 2325cfiscsi_target_hold(struct cfiscsi_target *ct) 2326{ 2327 2328 refcount_acquire(&ct->ct_refcount); 2329} 2330 2331static void 2332cfiscsi_target_release(struct cfiscsi_target *ct) 2333{ 2334 struct cfiscsi_softc *softc; 2335 2336 softc = ct->ct_softc; 2337 mtx_lock(&softc->lock); 2338 if (refcount_release(&ct->ct_refcount)) { 2339 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2340 mtx_unlock(&softc->lock); 2341 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2342 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2343 if (ctl_port_deregister(&ct->ct_port) != 0) 2344 printf("%s: ctl_port_deregister() failed\n", 2345 __func__); 2346 } 2347 free(ct, M_CFISCSI); 2348 2349 return; 2350 } 2351 mtx_unlock(&softc->lock); 2352} 2353 2354static struct cfiscsi_target * 2355cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2356{ 2357 struct cfiscsi_target *ct; 2358 2359 mtx_lock(&softc->lock); 2360 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2361 if (ct->ct_tag != tag || 2362 strcmp(name, ct->ct_name) != 0 || 2363 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2364 continue; 2365 cfiscsi_target_hold(ct); 2366 mtx_unlock(&softc->lock); 2367 return (ct); 2368 } 2369 mtx_unlock(&softc->lock); 2370 2371 return (NULL); 2372} 2373 2374static struct cfiscsi_target * 2375cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2376 const char *alias, uint16_t tag) 2377{ 2378 struct cfiscsi_target *ct, *newct; 2379 2380 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2381 return (NULL); 2382 2383 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2384 2385 mtx_lock(&softc->lock); 2386 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2387 if (ct->ct_tag != tag || 2388 strcmp(name, ct->ct_name) != 0 || 2389 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2390 continue; 2391 cfiscsi_target_hold(ct); 2392 mtx_unlock(&softc->lock); 2393 free(newct, M_CFISCSI); 2394 return (ct); 2395 } 2396 2397 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2398 if (alias != NULL) 2399 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2400 newct->ct_tag = tag; 2401 refcount_init(&newct->ct_refcount, 1); 2402 newct->ct_softc = softc; 2403 if (TAILQ_EMPTY(&softc->targets)) 2404 softc->last_target_id = 0; 2405 newct->ct_target_id = ++softc->last_target_id; 2406 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2407 mtx_unlock(&softc->lock); 2408 2409 return (newct); 2410} 2411 2412static void 2413cfiscsi_datamove_in(union ctl_io *io) 2414{ 2415 struct cfiscsi_session *cs; 2416 struct icl_pdu *request, *response; 2417 const struct iscsi_bhs_scsi_command *bhssc; 2418 struct iscsi_bhs_data_in *bhsdi; 2419 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2420 size_t len, expected_len, sg_len, buffer_offset; 2421 const char *sg_addr; 2422 int ctl_sg_count, error, i; 2423 2424 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2425 cs = PDU_SESSION(request); 2426 2427 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2428 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2429 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2430 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2431 2432 if (io->scsiio.kern_sg_entries > 0) { 2433 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2434 ctl_sg_count = io->scsiio.kern_sg_entries; 2435 } else { 2436 ctl_sglist = &ctl_sg_entry; 2437 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2438 ctl_sglist->len = io->scsiio.kern_data_len; 2439 ctl_sg_count = 1; 2440 } 2441 2442 /* 2443 * This is the total amount of data to be transferred within the current 2444 * SCSI command. We need to record it so that we can properly report 2445 * underflow/underflow. 2446 */ 2447 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2448 2449 /* 2450 * This is the offset within the current SCSI command; for the first 2451 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2452 * it will be the sum of lengths of previous ones. 2453 */ 2454 buffer_offset = io->scsiio.kern_rel_offset; 2455 2456 /* 2457 * This is the transfer length expected by the initiator. In theory, 2458 * it could be different from the correct amount of data from the SCSI 2459 * point of view, even if that doesn't make any sense. 2460 */ 2461 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2462#if 0 2463 if (expected_len != io->scsiio.kern_total_len) { 2464 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2465 "actual length %zd", expected_len, 2466 (size_t)io->scsiio.kern_total_len); 2467 } 2468#endif 2469 2470 if (buffer_offset >= expected_len) { 2471#if 0 2472 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2473 "already sent the expected len", buffer_offset); 2474#endif 2475 io->scsiio.be_move_done(io); 2476 return; 2477 } 2478 2479 i = 0; 2480 sg_addr = NULL; 2481 sg_len = 0; 2482 response = NULL; 2483 bhsdi = NULL; 2484 for (;;) { 2485 if (response == NULL) { 2486 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2487 if (response == NULL) { 2488 CFISCSI_SESSION_WARN(cs, "failed to " 2489 "allocate memory; dropping connection"); 2490 ctl_set_busy(&io->scsiio); 2491 io->scsiio.be_move_done(io); 2492 cfiscsi_session_terminate(cs); 2493 return; 2494 } 2495 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2496 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2497 bhsdi->bhsdi_initiator_task_tag = 2498 bhssc->bhssc_initiator_task_tag; 2499 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2500 PDU_EXPDATASN(request)++; 2501 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2502 } 2503 2504 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2505 if (sg_len == 0) { 2506 sg_addr = ctl_sglist[i].addr; 2507 sg_len = ctl_sglist[i].len; 2508 KASSERT(sg_len > 0, ("sg_len <= 0")); 2509 } 2510 2511 len = sg_len; 2512 2513 /* 2514 * Truncate to maximum data segment length. 2515 */ 2516 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2517 ("ip_data_len %zd >= max_data_segment_length %zd", 2518 response->ip_data_len, cs->cs_max_data_segment_length)); 2519 if (response->ip_data_len + len > 2520 cs->cs_max_data_segment_length) { 2521 len = cs->cs_max_data_segment_length - 2522 response->ip_data_len; 2523 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2524 len, sg_len)); 2525 } 2526 2527 /* 2528 * Truncate to expected data transfer length. 2529 */ 2530 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2531 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2532 buffer_offset, response->ip_data_len, expected_len)); 2533 if (buffer_offset + response->ip_data_len + len > expected_len) { 2534 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2535 "to expected data transfer length %zd", 2536 buffer_offset + response->ip_data_len + len, expected_len); 2537 len = expected_len - (buffer_offset + response->ip_data_len); 2538 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2539 len, sg_len)); 2540 } 2541 2542 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2543 if (error != 0) { 2544 CFISCSI_SESSION_WARN(cs, "failed to " 2545 "allocate memory; dropping connection"); 2546 icl_pdu_free(response); 2547 ctl_set_busy(&io->scsiio); 2548 io->scsiio.be_move_done(io); 2549 cfiscsi_session_terminate(cs); 2550 return; 2551 } 2552 sg_addr += len; 2553 sg_len -= len; 2554 2555 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2556 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2557 buffer_offset, response->ip_data_len, expected_len)); 2558 if (buffer_offset + response->ip_data_len == expected_len) { 2559 /* 2560 * Already have the amount of data the initiator wanted. 2561 */ 2562 break; 2563 } 2564 2565 if (sg_len == 0) { 2566 /* 2567 * End of scatter-gather segment; 2568 * proceed to the next one... 2569 */ 2570 if (i == ctl_sg_count - 1) { 2571 /* 2572 * ... unless this was the last one. 2573 */ 2574 break; 2575 } 2576 i++; 2577 } 2578 2579 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2580 /* 2581 * Can't stuff more data into the current PDU; 2582 * queue it. Note that's not enough to check 2583 * for kern_data_resid == 0 instead; there 2584 * may be several Data-In PDUs for the final 2585 * call to cfiscsi_datamove(), and we want 2586 * to set the F flag only on the last of them. 2587 */ 2588 buffer_offset += response->ip_data_len; 2589 if (buffer_offset == io->scsiio.kern_total_len || 2590 buffer_offset == expected_len) { 2591 buffer_offset -= response->ip_data_len; 2592 break; 2593 } 2594 cfiscsi_pdu_queue(response); 2595 response = NULL; 2596 bhsdi = NULL; 2597 } 2598 } 2599 if (response != NULL) { 2600 buffer_offset += response->ip_data_len; 2601 if (buffer_offset == io->scsiio.kern_total_len || 2602 buffer_offset == expected_len) { 2603 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2604 if (io->io_hdr.status == CTL_SUCCESS) { 2605 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2606 if (PDU_TOTAL_TRANSFER_LEN(request) < 2607 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2608 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2609 bhsdi->bhsdi_residual_count = 2610 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2611 PDU_TOTAL_TRANSFER_LEN(request)); 2612 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2613 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2614 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2615 bhsdi->bhsdi_residual_count = 2616 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2617 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2618 } 2619 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2620 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2621 } 2622 } 2623 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2624 cfiscsi_pdu_queue(response); 2625 } 2626 2627 io->scsiio.be_move_done(io); 2628} 2629 2630static void 2631cfiscsi_datamove_out(union ctl_io *io) 2632{ 2633 struct cfiscsi_session *cs; 2634 struct icl_pdu *request, *response; 2635 const struct iscsi_bhs_scsi_command *bhssc; 2636 struct iscsi_bhs_r2t *bhsr2t; 2637 struct cfiscsi_data_wait *cdw; 2638 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2639 uint32_t expected_len, r2t_off, r2t_len; 2640 uint32_t target_transfer_tag; 2641 bool done; 2642 2643 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2644 cs = PDU_SESSION(request); 2645 2646 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2647 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2648 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2649 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2650 2651 /* 2652 * We need to record it so that we can properly report 2653 * underflow/underflow. 2654 */ 2655 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2656 2657 /* 2658 * Report write underflow as error since CTL and backends don't 2659 * really support it, and SCSI does not tell how to do it right. 2660 */ 2661 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2662 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2663 expected_len) { 2664 io->scsiio.io_hdr.port_status = 43; 2665 io->scsiio.be_move_done(io); 2666 return; 2667 } 2668 2669 target_transfer_tag = 2670 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2671 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2672 &target_transfer_tag); 2673 if (cdw == NULL) { 2674 CFISCSI_SESSION_WARN(cs, "failed to " 2675 "allocate memory; dropping connection"); 2676 ctl_set_busy(&io->scsiio); 2677 io->scsiio.be_move_done(io); 2678 cfiscsi_session_terminate(cs); 2679 return; 2680 } 2681#if 0 2682 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2683 "task tag 0x%x, target transfer tag 0x%x", 2684 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2685#endif 2686 2687 cdw->cdw_ctl_io = io; 2688 cdw->cdw_target_transfer_tag = target_transfer_tag; 2689 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2690 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2691 cdw->cdw_datasn = 0; 2692 2693 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2694 if (io->scsiio.kern_sg_entries > 0) { 2695 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2696 } else { 2697 ctl_sglist = &ctl_sg_entry; 2698 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2699 ctl_sglist->len = io->scsiio.kern_data_len; 2700 } 2701 cdw->cdw_sg_index = 0; 2702 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2703 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2704 r2t_off = io->scsiio.ext_data_filled; 2705 while (r2t_off > 0) { 2706 if (r2t_off >= cdw->cdw_sg_len) { 2707 r2t_off -= cdw->cdw_sg_len; 2708 cdw->cdw_sg_index++; 2709 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2710 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2711 continue; 2712 } 2713 cdw->cdw_sg_addr += r2t_off; 2714 cdw->cdw_sg_len -= r2t_off; 2715 r2t_off = 0; 2716 } 2717 2718 if (cs->cs_immediate_data && 2719 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2720 icl_pdu_data_segment_length(request)) { 2721 done = cfiscsi_handle_data_segment(request, cdw); 2722 if (done) { 2723 cfiscsi_data_wait_free(cs, cdw); 2724 io->scsiio.be_move_done(io); 2725 return; 2726 } 2727 } 2728 2729 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2730 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2731 cs->cs_max_burst_length); 2732 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2733 2734 CFISCSI_SESSION_LOCK(cs); 2735 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2736 CFISCSI_SESSION_UNLOCK(cs); 2737 2738 /* 2739 * XXX: We should limit the number of outstanding R2T PDUs 2740 * per task to MaxOutstandingR2T. 2741 */ 2742 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2743 if (response == NULL) { 2744 CFISCSI_SESSION_WARN(cs, "failed to " 2745 "allocate memory; dropping connection"); 2746 ctl_set_busy(&io->scsiio); 2747 io->scsiio.be_move_done(io); 2748 cfiscsi_session_terminate(cs); 2749 return; 2750 } 2751 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2752 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2753 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2754 bhsr2t->bhsr2t_flags = 0x80; 2755 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2756 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2757 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2758 /* 2759 * XXX: Here we assume that cfiscsi_datamove() won't ever 2760 * be running concurrently on several CPUs for a given 2761 * command. 2762 */ 2763 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2764 PDU_R2TSN(request)++; 2765 /* 2766 * This is the offset within the current SCSI command; 2767 * i.e. for the first call of datamove(), it will be 0, 2768 * and for subsequent ones it will be the sum of lengths 2769 * of previous ones. 2770 * 2771 * The ext_data_filled is to account for unsolicited 2772 * (immediate) data that might have already arrived. 2773 */ 2774 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2775 /* 2776 * This is the total length (sum of S/G lengths) this call 2777 * to cfiscsi_datamove() is supposed to handle, limited by 2778 * MaxBurstLength. 2779 */ 2780 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2781 cfiscsi_pdu_queue(response); 2782} 2783 2784static void 2785cfiscsi_datamove(union ctl_io *io) 2786{ 2787 2788 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2789 cfiscsi_datamove_in(io); 2790 else { 2791 /* We hadn't received anything during this datamove yet. */ 2792 io->scsiio.ext_data_filled = 0; 2793 cfiscsi_datamove_out(io); 2794 } 2795} 2796 2797static void 2798cfiscsi_scsi_command_done(union ctl_io *io) 2799{ 2800 struct icl_pdu *request, *response; 2801 struct iscsi_bhs_scsi_command *bhssc; 2802 struct iscsi_bhs_scsi_response *bhssr; 2803#ifdef DIAGNOSTIC 2804 struct cfiscsi_data_wait *cdw; 2805#endif 2806 struct cfiscsi_session *cs; 2807 uint16_t sense_length; 2808 2809 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2810 cs = PDU_SESSION(request); 2811 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2812 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2813 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2814 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2815 2816 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2817 // bhssc->bhssc_initiator_task_tag); 2818 2819#ifdef DIAGNOSTIC 2820 CFISCSI_SESSION_LOCK(cs); 2821 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2822 KASSERT(bhssc->bhssc_initiator_task_tag != 2823 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2824 CFISCSI_SESSION_UNLOCK(cs); 2825#endif 2826 2827 /* 2828 * Do not return status for aborted commands. 2829 * There are exceptions, but none supported by CTL yet. 2830 */ 2831 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2832 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2833 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2834 ctl_free_io(io); 2835 icl_pdu_free(request); 2836 return; 2837 } 2838 2839 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2840 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2841 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2842 bhssr->bhssr_flags = 0x80; 2843 /* 2844 * XXX: We don't deal with bidirectional under/overflows; 2845 * does anything actually support those? 2846 */ 2847 if (PDU_TOTAL_TRANSFER_LEN(request) < 2848 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2849 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2850 bhssr->bhssr_residual_count = 2851 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2852 PDU_TOTAL_TRANSFER_LEN(request)); 2853 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2854 // ntohl(bhssr->bhssr_residual_count)); 2855 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2856 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2857 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2858 bhssr->bhssr_residual_count = 2859 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2860 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2861 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2862 // ntohl(bhssr->bhssr_residual_count)); 2863 } 2864 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2865 bhssr->bhssr_status = io->scsiio.scsi_status; 2866 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2867 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2868 2869 if (io->scsiio.sense_len > 0) { 2870#if 0 2871 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2872 io->scsiio.sense_len); 2873#endif 2874 sense_length = htons(io->scsiio.sense_len); 2875 icl_pdu_append_data(response, 2876 &sense_length, sizeof(sense_length), M_WAITOK); 2877 icl_pdu_append_data(response, 2878 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2879 } 2880 2881 ctl_free_io(io); 2882 icl_pdu_free(request); 2883 cfiscsi_pdu_queue(response); 2884} 2885 2886static void 2887cfiscsi_task_management_done(union ctl_io *io) 2888{ 2889 struct icl_pdu *request, *response; 2890 struct iscsi_bhs_task_management_request *bhstmr; 2891 struct iscsi_bhs_task_management_response *bhstmr2; 2892 struct cfiscsi_data_wait *cdw, *tmpcdw; 2893 struct cfiscsi_session *cs, *tcs; 2894 struct cfiscsi_softc *softc; 2895 int cold_reset = 0; 2896 2897 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2898 cs = PDU_SESSION(request); 2899 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2900 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2901 ISCSI_BHS_OPCODE_TASK_REQUEST, 2902 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2903 2904#if 0 2905 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2906 bhstmr->bhstmr_initiator_task_tag, 2907 bhstmr->bhstmr_referenced_task_tag); 2908#endif 2909 2910 if ((bhstmr->bhstmr_function & ~0x80) == 2911 BHSTMR_FUNCTION_ABORT_TASK) { 2912 /* 2913 * Make sure we no longer wait for Data-Out for this command. 2914 */ 2915 CFISCSI_SESSION_LOCK(cs); 2916 TAILQ_FOREACH_SAFE(cdw, 2917 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2918 if (bhstmr->bhstmr_referenced_task_tag != 2919 cdw->cdw_initiator_task_tag) 2920 continue; 2921 2922#if 0 2923 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2924 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2925#endif 2926 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2927 cdw, cdw_next); 2928 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2929 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2930 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2931 cfiscsi_data_wait_free(cs, cdw); 2932 } 2933 CFISCSI_SESSION_UNLOCK(cs); 2934 } 2935 if ((bhstmr->bhstmr_function & ~0x80) == 2936 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2937 io->io_hdr.status == CTL_SUCCESS) 2938 cold_reset = 1; 2939 2940 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2941 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2942 response->ip_bhs; 2943 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2944 bhstmr2->bhstmr_flags = 0x80; 2945 switch (io->taskio.task_status) { 2946 case CTL_TASK_FUNCTION_COMPLETE: 2947 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2948 break; 2949 case CTL_TASK_FUNCTION_SUCCEEDED: 2950 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2951 break; 2952 case CTL_TASK_LUN_DOES_NOT_EXIST: 2953 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2954 break; 2955 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2956 default: 2957 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2958 break; 2959 } 2960 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2961 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2962 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2963 2964 ctl_free_io(io); 2965 icl_pdu_free(request); 2966 cfiscsi_pdu_queue(response); 2967 2968 if (cold_reset) { 2969 softc = cs->cs_target->ct_softc; 2970 mtx_lock(&softc->lock); 2971 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2972 if (tcs->cs_target == cs->cs_target) 2973 cfiscsi_session_terminate(tcs); 2974 } 2975 mtx_unlock(&softc->lock); 2976 } 2977} 2978 2979static void 2980cfiscsi_done(union ctl_io *io) 2981{ 2982 struct icl_pdu *request; 2983 struct cfiscsi_session *cs; 2984 2985 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2986 ("invalid CTL status %#x", io->io_hdr.status)); 2987 2988 if (io->io_hdr.io_type == CTL_IO_TASK && 2989 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2990 /* 2991 * Implicit task termination has just completed; nothing to do. 2992 */ 2993 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2994 cs->cs_tasks_aborted = true; 2995 refcount_release(&cs->cs_outstanding_ctl_pdus); 2996 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2997 ctl_free_io(io); 2998 return; 2999 } 3000 3001 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 3002 cs = PDU_SESSION(request); 3003 refcount_release(&cs->cs_outstanding_ctl_pdus); 3004 3005 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 3006 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 3007 cfiscsi_scsi_command_done(io); 3008 break; 3009 case ISCSI_BHS_OPCODE_TASK_REQUEST: 3010 cfiscsi_task_management_done(io); 3011 break; 3012 default: 3013 panic("cfiscsi_done called with wrong opcode 0x%x", 3014 request->ip_bhs->bhs_opcode); 3015 } 3016} 3017