ctl_frontend_iscsi.c revision 287774
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 287774 2015-09-14 08:01:05Z 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 287774 2015-09-14 08:01:05Z 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; 177extern struct ctl_softc *control_softc; 178 179static struct ctl_frontend cfiscsi_frontend = 180{ 181 .name = "iscsi", 182 .init = cfiscsi_init, 183 .ioctl = cfiscsi_ioctl, 184}; 185CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 186MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 187 188static struct icl_pdu * 189cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 190{ 191 192 return (icl_pdu_new(request->ip_conn, flags)); 193} 194 195static bool 196cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 197{ 198 const struct iscsi_bhs_scsi_command *bhssc; 199 struct cfiscsi_session *cs; 200 uint32_t cmdsn, expstatsn; 201 202 cs = PDU_SESSION(request); 203 204 /* 205 * Every incoming PDU - not just NOP-Out - resets the ping timer. 206 * The purpose of the timeout is to reset the connection when it stalls; 207 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 208 * in some queue. 209 * 210 * XXX: Locking? 211 */ 212 cs->cs_timeout = 0; 213 214 /* 215 * Data-Out PDUs don't contain CmdSN. 216 */ 217 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 218 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 219 return (false); 220 221 /* 222 * We're only using fields common for all the request 223 * (initiator -> target) PDUs. 224 */ 225 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 226 cmdsn = ntohl(bhssc->bhssc_cmdsn); 227 expstatsn = ntohl(bhssc->bhssc_expstatsn); 228 229 CFISCSI_SESSION_LOCK(cs); 230#if 0 231 if (expstatsn != cs->cs_statsn) { 232 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 233 "while current StatSN is %d", expstatsn, 234 cs->cs_statsn); 235 } 236#endif 237 238 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 239 /* 240 * The target MUST silently ignore any non-immediate command 241 * outside of this range. 242 */ 243 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 244 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 245 CFISCSI_SESSION_UNLOCK(cs); 246 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 247 "while expected %u", cmdsn, cs->cs_cmdsn); 248 return (true); 249 } 250 251 /* 252 * We don't support multiple connections now, so any 253 * discontinuity in CmdSN means lost PDUs. Since we don't 254 * support PDU retransmission -- terminate the connection. 255 */ 256 if (cmdsn != cs->cs_cmdsn) { 257 CFISCSI_SESSION_UNLOCK(cs); 258 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 259 "while expected %u; dropping connection", 260 cmdsn, cs->cs_cmdsn); 261 cfiscsi_session_terminate(cs); 262 return (true); 263 } 264 cs->cs_cmdsn++; 265 } 266 267 CFISCSI_SESSION_UNLOCK(cs); 268 269 return (false); 270} 271 272static void 273cfiscsi_pdu_handle(struct icl_pdu *request) 274{ 275 struct cfiscsi_session *cs; 276 bool ignore; 277 278 cs = PDU_SESSION(request); 279 280 ignore = cfiscsi_pdu_update_cmdsn(request); 281 if (ignore) { 282 icl_pdu_free(request); 283 return; 284 } 285 286 /* 287 * Handle the PDU; this includes e.g. receiving the remaining 288 * part of PDU and submitting the SCSI command to CTL 289 * or queueing a reply. The handling routine is responsible 290 * for freeing the PDU when it's no longer needed. 291 */ 292 switch (request->ip_bhs->bhs_opcode & 293 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 294 case ISCSI_BHS_OPCODE_NOP_OUT: 295 cfiscsi_pdu_handle_nop_out(request); 296 break; 297 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 298 cfiscsi_pdu_handle_scsi_command(request); 299 break; 300 case ISCSI_BHS_OPCODE_TASK_REQUEST: 301 cfiscsi_pdu_handle_task_request(request); 302 break; 303 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 304 cfiscsi_pdu_handle_data_out(request); 305 break; 306 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 307 cfiscsi_pdu_handle_logout_request(request); 308 break; 309 default: 310 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 311 "opcode 0x%x; dropping connection", 312 request->ip_bhs->bhs_opcode); 313 icl_pdu_free(request); 314 cfiscsi_session_terminate(cs); 315 } 316 317} 318 319static void 320cfiscsi_receive_callback(struct icl_pdu *request) 321{ 322 struct cfiscsi_session *cs; 323 324 cs = PDU_SESSION(request); 325 326#ifdef ICL_KERNEL_PROXY 327 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 328 if (cs->cs_login_pdu == NULL) 329 cs->cs_login_pdu = request; 330 else 331 icl_pdu_free(request); 332 cv_signal(&cs->cs_login_cv); 333 return; 334 } 335#endif 336 337 cfiscsi_pdu_handle(request); 338} 339 340static void 341cfiscsi_error_callback(struct icl_conn *ic) 342{ 343 struct cfiscsi_session *cs; 344 345 cs = CONN_SESSION(ic); 346 347 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 348 cfiscsi_session_terminate(cs); 349} 350 351static int 352cfiscsi_pdu_prepare(struct icl_pdu *response) 353{ 354 struct cfiscsi_session *cs; 355 struct iscsi_bhs_scsi_response *bhssr; 356 bool advance_statsn = true; 357 358 cs = PDU_SESSION(response); 359 360 CFISCSI_SESSION_LOCK_ASSERT(cs); 361 362 /* 363 * We're only using fields common for all the response 364 * (target -> initiator) PDUs. 365 */ 366 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 367 368 /* 369 * 10.8.3: "The StatSN for this connection is not advanced 370 * after this PDU is sent." 371 */ 372 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 373 advance_statsn = false; 374 375 /* 376 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 377 * StatSN for the connection is not advanced after this PDU is sent." 378 */ 379 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 380 bhssr->bhssr_initiator_task_tag == 0xffffffff) 381 advance_statsn = false; 382 383 /* 384 * See the comment below - StatSN is not meaningful and must 385 * not be advanced. 386 */ 387 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 388 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 389 advance_statsn = false; 390 391 /* 392 * 10.7.3: "The fields StatSN, Status, and Residual Count 393 * only have meaningful content if the S bit is set to 1." 394 */ 395 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 396 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 397 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 398 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 399 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 400 401 if (advance_statsn) 402 cs->cs_statsn++; 403 404 return (0); 405} 406 407static void 408cfiscsi_pdu_queue(struct icl_pdu *response) 409{ 410 struct cfiscsi_session *cs; 411 412 cs = PDU_SESSION(response); 413 414 CFISCSI_SESSION_LOCK(cs); 415 cfiscsi_pdu_prepare(response); 416 icl_pdu_queue(response); 417 CFISCSI_SESSION_UNLOCK(cs); 418} 419 420static uint32_t 421cfiscsi_decode_lun(uint64_t encoded) 422{ 423 uint8_t lun[8]; 424 uint32_t result; 425 426 /* 427 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 428 * but is in fact an evil, multidimensional structure defined 429 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 430 */ 431 memcpy(lun, &encoded, sizeof(lun)); 432 switch (lun[0] & 0xC0) { 433 case 0x00: 434 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 435 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 436 CFISCSI_WARN("malformed LUN " 437 "(peripheral device addressing method): 0x%jx", 438 (uintmax_t)encoded); 439 result = 0xffffffff; 440 break; 441 } 442 result = lun[1]; 443 break; 444 case 0x40: 445 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 446 lun[6] != 0 || lun[7] != 0) { 447 CFISCSI_WARN("malformed LUN " 448 "(flat address space addressing method): 0x%jx", 449 (uintmax_t)encoded); 450 result = 0xffffffff; 451 break; 452 } 453 result = ((lun[0] & 0x3f) << 8) + lun[1]; 454 break; 455 case 0xC0: 456 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 457 lun[6] != 0 || lun[7] != 0) { 458 CFISCSI_WARN("malformed LUN (extended flat " 459 "address space addressing method): 0x%jx", 460 (uintmax_t)encoded); 461 result = 0xffffffff; 462 break; 463 } 464 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 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 if (done) 970 io->scsiio.be_move_done(io); 971 else 972 cfiscsi_datamove_out(io); 973 } 974 975 icl_pdu_free(request); 976} 977 978static void 979cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 980{ 981 struct iscsi_bhs_logout_request *bhslr; 982 struct iscsi_bhs_logout_response *bhslr2; 983 struct icl_pdu *response; 984 struct cfiscsi_session *cs; 985 986 cs = PDU_SESSION(request); 987 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 988 switch (bhslr->bhslr_reason & 0x7f) { 989 case BHSLR_REASON_CLOSE_SESSION: 990 case BHSLR_REASON_CLOSE_CONNECTION: 991 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 992 if (response == NULL) { 993 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 994 icl_pdu_free(request); 995 cfiscsi_session_terminate(cs); 996 return; 997 } 998 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 999 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 1000 bhslr2->bhslr_flags = 0x80; 1001 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 1002 bhslr2->bhslr_initiator_task_tag = 1003 bhslr->bhslr_initiator_task_tag; 1004 icl_pdu_free(request); 1005 cfiscsi_pdu_queue(response); 1006 cfiscsi_session_terminate(cs); 1007 break; 1008 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 1009 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 1010 if (response == NULL) { 1011 CFISCSI_SESSION_WARN(cs, 1012 "failed to allocate memory; dropping connection"); 1013 icl_pdu_free(request); 1014 cfiscsi_session_terminate(cs); 1015 return; 1016 } 1017 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 1018 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 1019 bhslr2->bhslr_flags = 0x80; 1020 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 1021 bhslr2->bhslr_initiator_task_tag = 1022 bhslr->bhslr_initiator_task_tag; 1023 icl_pdu_free(request); 1024 cfiscsi_pdu_queue(response); 1025 break; 1026 default: 1027 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 1028 bhslr->bhslr_reason); 1029 icl_pdu_free(request); 1030 cfiscsi_session_terminate(cs); 1031 break; 1032 } 1033} 1034 1035static void 1036cfiscsi_callout(void *context) 1037{ 1038 struct icl_pdu *cp; 1039 struct iscsi_bhs_nop_in *bhsni; 1040 struct cfiscsi_session *cs; 1041 1042 cs = context; 1043 1044 if (cs->cs_terminating) 1045 return; 1046 1047 callout_schedule(&cs->cs_callout, 1 * hz); 1048 1049 atomic_add_int(&cs->cs_timeout, 1); 1050 1051#ifdef ICL_KERNEL_PROXY 1052 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1053 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1054 CFISCSI_SESSION_WARN(cs, "login timed out after " 1055 "%d seconds; dropping connection", cs->cs_timeout); 1056 cfiscsi_session_terminate(cs); 1057 } 1058 return; 1059 } 1060#endif 1061 1062 if (ping_timeout <= 0) { 1063 /* 1064 * Pings are disabled. Don't send NOP-In in this case; 1065 * user might have disabled pings to work around problems 1066 * with certain initiators that can't properly handle 1067 * NOP-In, such as iPXE. Reset the timeout, to avoid 1068 * triggering reconnection, should the user decide to 1069 * reenable them. 1070 */ 1071 cs->cs_timeout = 0; 1072 return; 1073 } 1074 1075 if (cs->cs_timeout >= ping_timeout) { 1076 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1077 "dropping connection", ping_timeout); 1078 cfiscsi_session_terminate(cs); 1079 return; 1080 } 1081 1082 /* 1083 * If the ping was reset less than one second ago - which means 1084 * that we've received some PDU during the last second - assume 1085 * the traffic flows correctly and don't bother sending a NOP-Out. 1086 * 1087 * (It's 2 - one for one second, and one for incrementing is_timeout 1088 * earlier in this routine.) 1089 */ 1090 if (cs->cs_timeout < 2) 1091 return; 1092 1093 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1094 if (cp == NULL) { 1095 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1096 return; 1097 } 1098 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1099 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1100 bhsni->bhsni_flags = 0x80; 1101 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1102 1103 cfiscsi_pdu_queue(cp); 1104} 1105 1106static struct cfiscsi_data_wait * 1107cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1108 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1109{ 1110 struct cfiscsi_data_wait *cdw; 1111 int error; 1112 1113 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1114 if (cdw == NULL) { 1115 CFISCSI_SESSION_WARN(cs, 1116 "failed to allocate %zd bytes", sizeof(*cdw)); 1117 return (NULL); 1118 } 1119 1120 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1121 &cdw->cdw_icl_prv); 1122 if (error != 0) { 1123 CFISCSI_SESSION_WARN(cs, 1124 "icl_conn_transfer_setup() failed with error %d", error); 1125 uma_zfree(cfiscsi_data_wait_zone, cdw); 1126 return (NULL); 1127 } 1128 1129 cdw->cdw_ctl_io = io; 1130 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1131 cdw->cdw_initiator_task_tag = initiator_task_tag; 1132 1133 return (cdw); 1134} 1135 1136static void 1137cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1138 struct cfiscsi_data_wait *cdw) 1139{ 1140 1141 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1142 uma_zfree(cfiscsi_data_wait_zone, cdw); 1143} 1144 1145static void 1146cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1147{ 1148 struct cfiscsi_data_wait *cdw; 1149 union ctl_io *io; 1150 int error, last, wait; 1151 1152 if (cs->cs_target == NULL) 1153 return; /* No target yet, so nothing to do. */ 1154 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1155 ctl_zero_io(io); 1156 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1157 io->io_hdr.io_type = CTL_IO_TASK; 1158 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1159 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1160 io->io_hdr.nexus.targ_lun = 0; 1161 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1162 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1163 wait = cs->cs_outstanding_ctl_pdus; 1164 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1165 error = ctl_queue(io); 1166 if (error != CTL_RETVAL_COMPLETE) { 1167 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1168 refcount_release(&cs->cs_outstanding_ctl_pdus); 1169 ctl_free_io(io); 1170 } 1171 1172 CFISCSI_SESSION_LOCK(cs); 1173 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1174 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1175 CFISCSI_SESSION_UNLOCK(cs); 1176 /* 1177 * Set nonzero port status; this prevents backends from 1178 * assuming that the data transfer actually succeeded 1179 * and writing uninitialized data to disk. 1180 */ 1181 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1182 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1183 cfiscsi_data_wait_free(cs, cdw); 1184 CFISCSI_SESSION_LOCK(cs); 1185 } 1186 CFISCSI_SESSION_UNLOCK(cs); 1187 1188 /* 1189 * Wait for CTL to terminate all the tasks. 1190 */ 1191 if (wait > 0) 1192 CFISCSI_SESSION_WARN(cs, 1193 "waiting for CTL to terminate %d tasks", wait); 1194 for (;;) { 1195 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1196 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1197 if (last != 0) 1198 break; 1199 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1200 0, "cfiscsi_terminate", hz / 100); 1201 } 1202 if (wait > 0) 1203 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1204} 1205 1206static void 1207cfiscsi_maintenance_thread(void *arg) 1208{ 1209 struct cfiscsi_session *cs; 1210 1211 cs = arg; 1212 1213 for (;;) { 1214 CFISCSI_SESSION_LOCK(cs); 1215 if (cs->cs_terminating == false) 1216 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1217 CFISCSI_SESSION_UNLOCK(cs); 1218 1219 if (cs->cs_terminating) { 1220 1221 /* 1222 * We used to wait up to 30 seconds to deliver queued 1223 * PDUs to the initiator. We also tried hard to deliver 1224 * SCSI Responses for the aborted PDUs. We don't do 1225 * that anymore. We might need to revisit that. 1226 */ 1227 callout_drain(&cs->cs_callout); 1228 icl_conn_close(cs->cs_conn); 1229 1230 /* 1231 * At this point ICL receive thread is no longer 1232 * running; no new tasks can be queued. 1233 */ 1234 cfiscsi_session_terminate_tasks(cs); 1235 cfiscsi_session_delete(cs); 1236 kthread_exit(); 1237 return; 1238 } 1239 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1240 } 1241} 1242 1243static void 1244cfiscsi_session_terminate(struct cfiscsi_session *cs) 1245{ 1246 1247 if (cs->cs_terminating) 1248 return; 1249 cs->cs_terminating = true; 1250 cv_signal(&cs->cs_maintenance_cv); 1251#ifdef ICL_KERNEL_PROXY 1252 cv_signal(&cs->cs_login_cv); 1253#endif 1254} 1255 1256static int 1257cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1258{ 1259 struct cfiscsi_target *ct; 1260 char *name; 1261 int i; 1262 1263 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1264 1265 ct = cs->cs_target; 1266 name = strdup(cs->cs_initiator_id, M_CTL); 1267 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1268 if (i < 0) { 1269 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1270 i); 1271 cs->cs_ctl_initid = -1; 1272 return (1); 1273 } 1274 cs->cs_ctl_initid = i; 1275#if 0 1276 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1277#endif 1278 1279 return (0); 1280} 1281 1282static void 1283cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1284{ 1285 int error; 1286 1287 if (cs->cs_ctl_initid == -1) 1288 return; 1289 1290 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1291 if (error != 0) { 1292 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1293 error); 1294 } 1295 cs->cs_ctl_initid = -1; 1296} 1297 1298static struct cfiscsi_session * 1299cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1300{ 1301 struct cfiscsi_session *cs; 1302 int error; 1303 1304 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1305 if (cs == NULL) { 1306 CFISCSI_WARN("malloc failed"); 1307 return (NULL); 1308 } 1309 cs->cs_ctl_initid = -1; 1310 1311 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1312 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1313 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1314 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1315#ifdef ICL_KERNEL_PROXY 1316 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1317#endif 1318 1319 cs->cs_conn = icl_new_conn(offload, "cfiscsi", &cs->cs_lock); 1320 if (cs->cs_conn == NULL) { 1321 free(cs, M_CFISCSI); 1322 return (NULL); 1323 } 1324 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1325 cs->cs_conn->ic_error = cfiscsi_error_callback; 1326 cs->cs_conn->ic_prv0 = cs; 1327 1328 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1329 if (error != 0) { 1330 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1331 free(cs, M_CFISCSI); 1332 return (NULL); 1333 } 1334 1335 mtx_lock(&softc->lock); 1336 cs->cs_id = ++softc->last_session_id; 1337 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1338 mtx_unlock(&softc->lock); 1339 1340 /* 1341 * Start pinging the initiator. 1342 */ 1343 callout_init(&cs->cs_callout, 1); 1344 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1345 1346 return (cs); 1347} 1348 1349static void 1350cfiscsi_session_delete(struct cfiscsi_session *cs) 1351{ 1352 struct cfiscsi_softc *softc; 1353 1354 softc = &cfiscsi_softc; 1355 1356 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1357 ("destroying session with outstanding CTL pdus")); 1358 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1359 ("destroying session with non-empty queue")); 1360 1361 cfiscsi_session_unregister_initiator(cs); 1362 if (cs->cs_target != NULL) 1363 cfiscsi_target_release(cs->cs_target); 1364 icl_conn_close(cs->cs_conn); 1365 icl_conn_free(cs->cs_conn); 1366 1367 mtx_lock(&softc->lock); 1368 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1369 cv_signal(&softc->sessions_cv); 1370 mtx_unlock(&softc->lock); 1371 1372 free(cs, M_CFISCSI); 1373} 1374 1375int 1376cfiscsi_init(void) 1377{ 1378 struct cfiscsi_softc *softc; 1379 int retval; 1380 1381 softc = &cfiscsi_softc; 1382 retval = 0; 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 cfiscsi_session_terminate(cs2); 1613 mtx_unlock(&softc->lock); 1614 pause("cfiscsi_reinstate", 1); 1615 goto restart; 1616 } 1617 } 1618 mtx_unlock(&softc->lock); 1619 } 1620 1621 /* 1622 * Register initiator with CTL. 1623 */ 1624 cfiscsi_session_register_initiator(cs); 1625 1626#ifdef ICL_KERNEL_PROXY 1627 if (cihp->socket > 0) { 1628#endif 1629 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1630 if (error != 0) { 1631 cfiscsi_session_terminate(cs); 1632 refcount_release(&cs->cs_outstanding_ctl_pdus); 1633 ci->status = CTL_ISCSI_ERROR; 1634 snprintf(ci->error_str, sizeof(ci->error_str), 1635 "%s: icl_conn_handoff failed with error %d", 1636 __func__, error); 1637 return; 1638 } 1639#ifdef ICL_KERNEL_PROXY 1640 } 1641#endif 1642 1643#ifdef ICL_KERNEL_PROXY 1644 cs->cs_login_phase = false; 1645 1646 /* 1647 * First PDU of the Full Feature phase has likely already arrived. 1648 * We have to pick it up and execute properly. 1649 */ 1650 if (cs->cs_login_pdu != NULL) { 1651 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1652 cfiscsi_pdu_handle(cs->cs_login_pdu); 1653 cs->cs_login_pdu = NULL; 1654 } 1655#endif 1656 1657 refcount_release(&cs->cs_outstanding_ctl_pdus); 1658 ci->status = CTL_ISCSI_OK; 1659} 1660 1661static void 1662cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1663{ 1664 struct ctl_iscsi_list_params *cilp; 1665 struct cfiscsi_session *cs; 1666 struct cfiscsi_softc *softc; 1667 struct sbuf *sb; 1668 int error; 1669 1670 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1671 softc = &cfiscsi_softc; 1672 1673 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1674 if (sb == NULL) { 1675 ci->status = CTL_ISCSI_ERROR; 1676 snprintf(ci->error_str, sizeof(ci->error_str), 1677 "Unable to allocate %d bytes for iSCSI session list", 1678 cilp->alloc_len); 1679 return; 1680 } 1681 1682 sbuf_printf(sb, "<ctlislist>\n"); 1683 mtx_lock(&softc->lock); 1684 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1685#ifdef ICL_KERNEL_PROXY 1686 if (cs->cs_target == NULL) 1687 continue; 1688#endif 1689 error = sbuf_printf(sb, "<connection id=\"%d\">" 1690 "<initiator>%s</initiator>" 1691 "<initiator_addr>%s</initiator_addr>" 1692 "<initiator_alias>%s</initiator_alias>" 1693 "<target>%s</target>" 1694 "<target_alias>%s</target_alias>" 1695 "<target_portal_group_tag>%u</target_portal_group_tag>" 1696 "<header_digest>%s</header_digest>" 1697 "<data_digest>%s</data_digest>" 1698 "<max_data_segment_length>%zd</max_data_segment_length>" 1699 "<immediate_data>%d</immediate_data>" 1700 "<iser>%d</iser>" 1701 "<offload>%s</offload>" 1702 "</connection>\n", 1703 cs->cs_id, 1704 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1705 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1706 cs->cs_target->ct_tag, 1707 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1708 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1709 cs->cs_max_data_segment_length, 1710 cs->cs_immediate_data, 1711 cs->cs_conn->ic_iser, 1712 cs->cs_conn->ic_offload); 1713 if (error != 0) 1714 break; 1715 } 1716 mtx_unlock(&softc->lock); 1717 error = sbuf_printf(sb, "</ctlislist>\n"); 1718 if (error != 0) { 1719 sbuf_delete(sb); 1720 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1721 snprintf(ci->error_str, sizeof(ci->error_str), 1722 "Out of space, %d bytes is too small", cilp->alloc_len); 1723 return; 1724 } 1725 sbuf_finish(sb); 1726 1727 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1728 cilp->fill_len = sbuf_len(sb) + 1; 1729 ci->status = CTL_ISCSI_OK; 1730 sbuf_delete(sb); 1731} 1732 1733static void 1734cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1735{ 1736 struct icl_pdu *response; 1737 struct iscsi_bhs_asynchronous_message *bhsam; 1738 struct ctl_iscsi_logout_params *cilp; 1739 struct cfiscsi_session *cs; 1740 struct cfiscsi_softc *softc; 1741 int found = 0; 1742 1743 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1744 softc = &cfiscsi_softc; 1745 1746 mtx_lock(&softc->lock); 1747 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1748 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1749 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1750 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1751 continue; 1752 1753 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1754 if (response == NULL) { 1755 ci->status = CTL_ISCSI_ERROR; 1756 snprintf(ci->error_str, sizeof(ci->error_str), 1757 "Unable to allocate memory"); 1758 mtx_unlock(&softc->lock); 1759 return; 1760 } 1761 bhsam = 1762 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1763 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1764 bhsam->bhsam_flags = 0x80; 1765 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1766 bhsam->bhsam_parameter3 = htons(10); 1767 cfiscsi_pdu_queue(response); 1768 found++; 1769 } 1770 mtx_unlock(&softc->lock); 1771 1772 if (found == 0) { 1773 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1774 snprintf(ci->error_str, sizeof(ci->error_str), 1775 "No matching connections found"); 1776 return; 1777 } 1778 1779 ci->status = CTL_ISCSI_OK; 1780} 1781 1782static void 1783cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1784{ 1785 struct icl_pdu *response; 1786 struct iscsi_bhs_asynchronous_message *bhsam; 1787 struct ctl_iscsi_terminate_params *citp; 1788 struct cfiscsi_session *cs; 1789 struct cfiscsi_softc *softc; 1790 int found = 0; 1791 1792 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1793 softc = &cfiscsi_softc; 1794 1795 mtx_lock(&softc->lock); 1796 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1797 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1798 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1799 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1800 continue; 1801 1802 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1803 if (response == NULL) { 1804 /* 1805 * Oh well. Just terminate the connection. 1806 */ 1807 } else { 1808 bhsam = (struct iscsi_bhs_asynchronous_message *) 1809 response->ip_bhs; 1810 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1811 bhsam->bhsam_flags = 0x80; 1812 bhsam->bhsam_0xffffffff = 0xffffffff; 1813 bhsam->bhsam_async_event = 1814 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1815 cfiscsi_pdu_queue(response); 1816 } 1817 cfiscsi_session_terminate(cs); 1818 found++; 1819 } 1820 mtx_unlock(&softc->lock); 1821 1822 if (found == 0) { 1823 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1824 snprintf(ci->error_str, sizeof(ci->error_str), 1825 "No matching connections found"); 1826 return; 1827 } 1828 1829 ci->status = CTL_ISCSI_OK; 1830} 1831 1832static void 1833cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1834{ 1835 struct ctl_iscsi_limits_params *cilp; 1836 int error; 1837 1838 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1839 1840 error = icl_limits(cilp->offload, &cilp->data_segment_limit); 1841 if (error != 0) { 1842 ci->status = CTL_ISCSI_ERROR; 1843 snprintf(ci->error_str, sizeof(ci->error_str), 1844 "%s: icl_limits failed with error %d", 1845 __func__, error); 1846 return; 1847 } 1848 1849 ci->status = CTL_ISCSI_OK; 1850} 1851 1852#ifdef ICL_KERNEL_PROXY 1853static void 1854cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1855{ 1856 struct ctl_iscsi_listen_params *cilp; 1857 struct sockaddr *sa; 1858 int error; 1859 1860 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1861 1862 if (cfiscsi_softc.listener == NULL) { 1863 CFISCSI_DEBUG("no listener"); 1864 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1865 ci->status = CTL_ISCSI_ERROR; 1866 return; 1867 } 1868 1869 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1870 if (error != 0) { 1871 CFISCSI_DEBUG("getsockaddr, error %d", error); 1872 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1873 ci->status = CTL_ISCSI_ERROR; 1874 return; 1875 } 1876 1877 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1878 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1879 if (error != 0) { 1880 free(sa, M_SONAME); 1881 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1882 snprintf(ci->error_str, sizeof(ci->error_str), 1883 "icl_listen_add failed, error %d", error); 1884 ci->status = CTL_ISCSI_ERROR; 1885 return; 1886 } 1887 1888 ci->status = CTL_ISCSI_OK; 1889} 1890 1891static void 1892cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1893{ 1894 struct ctl_iscsi_accept_params *ciap; 1895 struct cfiscsi_session *cs; 1896 int error; 1897 1898 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1899 1900 mtx_lock(&cfiscsi_softc.lock); 1901 for (;;) { 1902 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1903 if (cs->cs_waiting_for_ctld) 1904 break; 1905 } 1906 if (cs != NULL) 1907 break; 1908 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1909 if (error != 0) { 1910 mtx_unlock(&cfiscsi_softc.lock); 1911 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1912 ci->status = CTL_ISCSI_ERROR; 1913 return; 1914 } 1915 } 1916 mtx_unlock(&cfiscsi_softc.lock); 1917 1918 cs->cs_waiting_for_ctld = false; 1919 cs->cs_login_phase = true; 1920 1921 ciap->connection_id = cs->cs_id; 1922 ciap->portal_id = cs->cs_portal_id; 1923 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1924 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1925 cs->cs_initiator_sa->sa_len); 1926 if (error != 0) { 1927 snprintf(ci->error_str, sizeof(ci->error_str), 1928 "copyout failed with error %d", error); 1929 ci->status = CTL_ISCSI_ERROR; 1930 return; 1931 } 1932 1933 ci->status = CTL_ISCSI_OK; 1934} 1935 1936static void 1937cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1938{ 1939 struct ctl_iscsi_send_params *cisp; 1940 struct cfiscsi_session *cs; 1941 struct icl_pdu *ip; 1942 size_t datalen; 1943 void *data; 1944 int error; 1945 1946 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1947 1948 mtx_lock(&cfiscsi_softc.lock); 1949 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1950 if (cs->cs_id == cisp->connection_id) 1951 break; 1952 } 1953 if (cs == NULL) { 1954 mtx_unlock(&cfiscsi_softc.lock); 1955 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1956 ci->status = CTL_ISCSI_ERROR; 1957 return; 1958 } 1959 mtx_unlock(&cfiscsi_softc.lock); 1960 1961#if 0 1962 if (cs->cs_login_phase == false) 1963 return (EBUSY); 1964#endif 1965 1966 if (cs->cs_terminating) { 1967 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1968 ci->status = CTL_ISCSI_ERROR; 1969 return; 1970 } 1971 1972 datalen = cisp->data_segment_len; 1973 /* 1974 * XXX 1975 */ 1976 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1977 if (datalen > 65535) { 1978 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1979 ci->status = CTL_ISCSI_ERROR; 1980 return; 1981 } 1982 if (datalen > 0) { 1983 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1984 error = copyin(cisp->data_segment, data, datalen); 1985 if (error != 0) { 1986 free(data, M_CFISCSI); 1987 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1988 ci->status = CTL_ISCSI_ERROR; 1989 return; 1990 } 1991 } 1992 1993 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1994 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1995 if (datalen > 0) { 1996 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1997 free(data, M_CFISCSI); 1998 } 1999 CFISCSI_SESSION_LOCK(cs); 2000 icl_pdu_queue(ip); 2001 CFISCSI_SESSION_UNLOCK(cs); 2002 ci->status = CTL_ISCSI_OK; 2003} 2004 2005static void 2006cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 2007{ 2008 struct ctl_iscsi_receive_params *cirp; 2009 struct cfiscsi_session *cs; 2010 struct icl_pdu *ip; 2011 void *data; 2012 int error; 2013 2014 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2015 2016 mtx_lock(&cfiscsi_softc.lock); 2017 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2018 if (cs->cs_id == cirp->connection_id) 2019 break; 2020 } 2021 if (cs == NULL) { 2022 mtx_unlock(&cfiscsi_softc.lock); 2023 snprintf(ci->error_str, sizeof(ci->error_str), 2024 "connection not found"); 2025 ci->status = CTL_ISCSI_ERROR; 2026 return; 2027 } 2028 mtx_unlock(&cfiscsi_softc.lock); 2029 2030#if 0 2031 if (is->is_login_phase == false) 2032 return (EBUSY); 2033#endif 2034 2035 CFISCSI_SESSION_LOCK(cs); 2036 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2037 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2038 if (error != 0) { 2039 CFISCSI_SESSION_UNLOCK(cs); 2040 snprintf(ci->error_str, sizeof(ci->error_str), 2041 "interrupted by signal"); 2042 ci->status = CTL_ISCSI_ERROR; 2043 return; 2044 } 2045 } 2046 2047 if (cs->cs_terminating) { 2048 CFISCSI_SESSION_UNLOCK(cs); 2049 snprintf(ci->error_str, sizeof(ci->error_str), 2050 "connection terminating"); 2051 ci->status = CTL_ISCSI_ERROR; 2052 return; 2053 } 2054 ip = cs->cs_login_pdu; 2055 cs->cs_login_pdu = NULL; 2056 CFISCSI_SESSION_UNLOCK(cs); 2057 2058 if (ip->ip_data_len > cirp->data_segment_len) { 2059 icl_pdu_free(ip); 2060 snprintf(ci->error_str, sizeof(ci->error_str), 2061 "data segment too big"); 2062 ci->status = CTL_ISCSI_ERROR; 2063 return; 2064 } 2065 2066 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2067 if (ip->ip_data_len > 0) { 2068 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2069 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2070 copyout(data, cirp->data_segment, ip->ip_data_len); 2071 free(data, M_CFISCSI); 2072 } 2073 2074 icl_pdu_free(ip); 2075 ci->status = CTL_ISCSI_OK; 2076} 2077 2078#endif /* !ICL_KERNEL_PROXY */ 2079 2080static void 2081cfiscsi_ioctl_port_create(struct ctl_req *req) 2082{ 2083 struct cfiscsi_target *ct; 2084 struct ctl_port *port; 2085 const char *target, *alias, *tags; 2086 struct scsi_vpd_id_descriptor *desc; 2087 ctl_options_t opts; 2088 int retval, len, idlen; 2089 uint16_t tag; 2090 2091 ctl_init_opts(&opts, req->num_args, req->kern_args); 2092 target = ctl_get_opt(&opts, "cfiscsi_target"); 2093 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2094 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2095 if (target == NULL || tags == NULL) { 2096 req->status = CTL_LUN_ERROR; 2097 snprintf(req->error_str, sizeof(req->error_str), 2098 "Missing required argument"); 2099 ctl_free_opts(&opts); 2100 return; 2101 } 2102 tag = strtol(tags, (char **)NULL, 10); 2103 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2104 if (ct == NULL) { 2105 req->status = CTL_LUN_ERROR; 2106 snprintf(req->error_str, sizeof(req->error_str), 2107 "failed to create target \"%s\"", target); 2108 ctl_free_opts(&opts); 2109 return; 2110 } 2111 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2112 req->status = CTL_LUN_ERROR; 2113 snprintf(req->error_str, sizeof(req->error_str), 2114 "target \"%s\" already exists", target); 2115 cfiscsi_target_release(ct); 2116 ctl_free_opts(&opts); 2117 return; 2118 } 2119 port = &ct->ct_port; 2120 // WAT 2121 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2122 goto done; 2123 2124 port->frontend = &cfiscsi_frontend; 2125 port->port_type = CTL_PORT_ISCSI; 2126 /* XXX KDM what should the real number be here? */ 2127 port->num_requested_ctl_io = 4096; 2128 port->port_name = "iscsi"; 2129 port->physical_port = tag; 2130 port->virtual_port = ct->ct_target_id; 2131 port->port_online = cfiscsi_online; 2132 port->port_offline = cfiscsi_offline; 2133 port->port_info = cfiscsi_info; 2134 port->onoff_arg = ct; 2135 port->fe_datamove = cfiscsi_datamove; 2136 port->fe_done = cfiscsi_done; 2137 2138 /* XXX KDM what should we report here? */ 2139 /* XXX These should probably be fetched from CTL. */ 2140 port->max_targets = 1; 2141 port->max_target_id = 15; 2142 port->targ_port = -1; 2143 2144 port->options = opts; 2145 STAILQ_INIT(&opts); 2146 2147 /* Generate Port ID. */ 2148 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2149 idlen = roundup2(idlen, 4); 2150 len = sizeof(struct scsi_vpd_device_id) + idlen; 2151 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2152 M_CTL, M_WAITOK | M_ZERO); 2153 port->port_devid->len = len; 2154 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2155 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2156 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2157 SVPD_ID_TYPE_SCSI_NAME; 2158 desc->length = idlen; 2159 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2160 2161 /* Generate Target ID. */ 2162 idlen = strlen(target) + 1; 2163 idlen = roundup2(idlen, 4); 2164 len = sizeof(struct scsi_vpd_device_id) + idlen; 2165 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2166 M_CTL, M_WAITOK | M_ZERO); 2167 port->target_devid->len = len; 2168 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2169 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2170 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2171 SVPD_ID_TYPE_SCSI_NAME; 2172 desc->length = idlen; 2173 strlcpy(desc->identifier, target, idlen); 2174 2175 retval = ctl_port_register(port); 2176 if (retval != 0) { 2177 ctl_free_opts(&port->options); 2178 cfiscsi_target_release(ct); 2179 free(port->port_devid, M_CFISCSI); 2180 free(port->target_devid, M_CFISCSI); 2181 req->status = CTL_LUN_ERROR; 2182 snprintf(req->error_str, sizeof(req->error_str), 2183 "ctl_port_register() failed with error %d", retval); 2184 return; 2185 } 2186done: 2187 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2188 req->status = CTL_LUN_OK; 2189 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2190 sizeof(port->targ_port)); //XXX 2191} 2192 2193static void 2194cfiscsi_ioctl_port_remove(struct ctl_req *req) 2195{ 2196 struct cfiscsi_target *ct; 2197 const char *target, *tags; 2198 ctl_options_t opts; 2199 uint16_t tag; 2200 2201 ctl_init_opts(&opts, req->num_args, req->kern_args); 2202 target = ctl_get_opt(&opts, "cfiscsi_target"); 2203 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2204 if (target == NULL || tags == NULL) { 2205 ctl_free_opts(&opts); 2206 req->status = CTL_LUN_ERROR; 2207 snprintf(req->error_str, sizeof(req->error_str), 2208 "Missing required argument"); 2209 return; 2210 } 2211 tag = strtol(tags, (char **)NULL, 10); 2212 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2213 if (ct == NULL) { 2214 ctl_free_opts(&opts); 2215 req->status = CTL_LUN_ERROR; 2216 snprintf(req->error_str, sizeof(req->error_str), 2217 "can't find target \"%s\"", target); 2218 return; 2219 } 2220 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2221 ctl_free_opts(&opts); 2222 req->status = CTL_LUN_ERROR; 2223 snprintf(req->error_str, sizeof(req->error_str), 2224 "target \"%s\" is already dying", target); 2225 return; 2226 } 2227 ctl_free_opts(&opts); 2228 2229 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2230 ctl_port_offline(&ct->ct_port); 2231 cfiscsi_target_release(ct); 2232 cfiscsi_target_release(ct); 2233 req->status = CTL_LUN_OK; 2234} 2235 2236static int 2237cfiscsi_ioctl(struct cdev *dev, 2238 u_long cmd, caddr_t addr, int flag, struct thread *td) 2239{ 2240 struct ctl_iscsi *ci; 2241 struct ctl_req *req; 2242 2243 if (cmd == CTL_PORT_REQ) { 2244 req = (struct ctl_req *)addr; 2245 switch (req->reqtype) { 2246 case CTL_REQ_CREATE: 2247 cfiscsi_ioctl_port_create(req); 2248 break; 2249 case CTL_REQ_REMOVE: 2250 cfiscsi_ioctl_port_remove(req); 2251 break; 2252 default: 2253 req->status = CTL_LUN_ERROR; 2254 snprintf(req->error_str, sizeof(req->error_str), 2255 "Unsupported request type %d", req->reqtype); 2256 } 2257 return (0); 2258 } 2259 2260 if (cmd != CTL_ISCSI) 2261 return (ENOTTY); 2262 2263 ci = (struct ctl_iscsi *)addr; 2264 switch (ci->type) { 2265 case CTL_ISCSI_HANDOFF: 2266 cfiscsi_ioctl_handoff(ci); 2267 break; 2268 case CTL_ISCSI_LIST: 2269 cfiscsi_ioctl_list(ci); 2270 break; 2271 case CTL_ISCSI_LOGOUT: 2272 cfiscsi_ioctl_logout(ci); 2273 break; 2274 case CTL_ISCSI_TERMINATE: 2275 cfiscsi_ioctl_terminate(ci); 2276 break; 2277 case CTL_ISCSI_LIMITS: 2278 cfiscsi_ioctl_limits(ci); 2279 break; 2280#ifdef ICL_KERNEL_PROXY 2281 case CTL_ISCSI_LISTEN: 2282 cfiscsi_ioctl_listen(ci); 2283 break; 2284 case CTL_ISCSI_ACCEPT: 2285 cfiscsi_ioctl_accept(ci); 2286 break; 2287 case CTL_ISCSI_SEND: 2288 cfiscsi_ioctl_send(ci); 2289 break; 2290 case CTL_ISCSI_RECEIVE: 2291 cfiscsi_ioctl_receive(ci); 2292 break; 2293#else 2294 case CTL_ISCSI_LISTEN: 2295 case CTL_ISCSI_ACCEPT: 2296 case CTL_ISCSI_SEND: 2297 case CTL_ISCSI_RECEIVE: 2298 ci->status = CTL_ISCSI_ERROR; 2299 snprintf(ci->error_str, sizeof(ci->error_str), 2300 "%s: CTL compiled without ICL_KERNEL_PROXY", 2301 __func__); 2302 break; 2303#endif /* !ICL_KERNEL_PROXY */ 2304 default: 2305 ci->status = CTL_ISCSI_ERROR; 2306 snprintf(ci->error_str, sizeof(ci->error_str), 2307 "%s: invalid iSCSI request type %d", __func__, ci->type); 2308 break; 2309 } 2310 2311 return (0); 2312} 2313 2314static void 2315cfiscsi_target_hold(struct cfiscsi_target *ct) 2316{ 2317 2318 refcount_acquire(&ct->ct_refcount); 2319} 2320 2321static void 2322cfiscsi_target_release(struct cfiscsi_target *ct) 2323{ 2324 struct cfiscsi_softc *softc; 2325 2326 softc = ct->ct_softc; 2327 mtx_lock(&softc->lock); 2328 if (refcount_release(&ct->ct_refcount)) { 2329 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2330 mtx_unlock(&softc->lock); 2331 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2332 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2333 if (ctl_port_deregister(&ct->ct_port) != 0) 2334 printf("%s: ctl_port_deregister() failed\n", 2335 __func__); 2336 } 2337 free(ct, M_CFISCSI); 2338 2339 return; 2340 } 2341 mtx_unlock(&softc->lock); 2342} 2343 2344static struct cfiscsi_target * 2345cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2346{ 2347 struct cfiscsi_target *ct; 2348 2349 mtx_lock(&softc->lock); 2350 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2351 if (ct->ct_tag != tag || 2352 strcmp(name, ct->ct_name) != 0 || 2353 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2354 continue; 2355 cfiscsi_target_hold(ct); 2356 mtx_unlock(&softc->lock); 2357 return (ct); 2358 } 2359 mtx_unlock(&softc->lock); 2360 2361 return (NULL); 2362} 2363 2364static struct cfiscsi_target * 2365cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2366 const char *alias, uint16_t tag) 2367{ 2368 struct cfiscsi_target *ct, *newct; 2369 2370 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2371 return (NULL); 2372 2373 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2374 2375 mtx_lock(&softc->lock); 2376 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2377 if (ct->ct_tag != tag || 2378 strcmp(name, ct->ct_name) != 0 || 2379 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2380 continue; 2381 cfiscsi_target_hold(ct); 2382 mtx_unlock(&softc->lock); 2383 free(newct, M_CFISCSI); 2384 return (ct); 2385 } 2386 2387 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2388 if (alias != NULL) 2389 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2390 newct->ct_tag = tag; 2391 refcount_init(&newct->ct_refcount, 1); 2392 newct->ct_softc = softc; 2393 if (TAILQ_EMPTY(&softc->targets)) 2394 softc->last_target_id = 0; 2395 newct->ct_target_id = ++softc->last_target_id; 2396 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2397 mtx_unlock(&softc->lock); 2398 2399 return (newct); 2400} 2401 2402static void 2403cfiscsi_datamove_in(union ctl_io *io) 2404{ 2405 struct cfiscsi_session *cs; 2406 struct icl_pdu *request, *response; 2407 const struct iscsi_bhs_scsi_command *bhssc; 2408 struct iscsi_bhs_data_in *bhsdi; 2409 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2410 size_t len, expected_len, sg_len, buffer_offset; 2411 const char *sg_addr; 2412 int ctl_sg_count, error, i; 2413 2414 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2415 cs = PDU_SESSION(request); 2416 2417 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2418 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2419 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2420 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2421 2422 if (io->scsiio.kern_sg_entries > 0) { 2423 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2424 ctl_sg_count = io->scsiio.kern_sg_entries; 2425 } else { 2426 ctl_sglist = &ctl_sg_entry; 2427 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2428 ctl_sglist->len = io->scsiio.kern_data_len; 2429 ctl_sg_count = 1; 2430 } 2431 2432 /* 2433 * This is the total amount of data to be transferred within the current 2434 * SCSI command. We need to record it so that we can properly report 2435 * underflow/underflow. 2436 */ 2437 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2438 2439 /* 2440 * This is the offset within the current SCSI command; for the first 2441 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2442 * it will be the sum of lengths of previous ones. 2443 */ 2444 buffer_offset = io->scsiio.kern_rel_offset; 2445 2446 /* 2447 * This is the transfer length expected by the initiator. In theory, 2448 * it could be different from the correct amount of data from the SCSI 2449 * point of view, even if that doesn't make any sense. 2450 */ 2451 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2452#if 0 2453 if (expected_len != io->scsiio.kern_total_len) { 2454 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2455 "actual length %zd", expected_len, 2456 (size_t)io->scsiio.kern_total_len); 2457 } 2458#endif 2459 2460 if (buffer_offset >= expected_len) { 2461#if 0 2462 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2463 "already sent the expected len", buffer_offset); 2464#endif 2465 io->scsiio.be_move_done(io); 2466 return; 2467 } 2468 2469 i = 0; 2470 sg_addr = NULL; 2471 sg_len = 0; 2472 response = NULL; 2473 bhsdi = NULL; 2474 for (;;) { 2475 if (response == NULL) { 2476 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2477 if (response == NULL) { 2478 CFISCSI_SESSION_WARN(cs, "failed to " 2479 "allocate memory; dropping connection"); 2480 ctl_set_busy(&io->scsiio); 2481 io->scsiio.be_move_done(io); 2482 cfiscsi_session_terminate(cs); 2483 return; 2484 } 2485 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2486 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2487 bhsdi->bhsdi_initiator_task_tag = 2488 bhssc->bhssc_initiator_task_tag; 2489 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2490 PDU_EXPDATASN(request)++; 2491 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2492 } 2493 2494 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2495 if (sg_len == 0) { 2496 sg_addr = ctl_sglist[i].addr; 2497 sg_len = ctl_sglist[i].len; 2498 KASSERT(sg_len > 0, ("sg_len <= 0")); 2499 } 2500 2501 len = sg_len; 2502 2503 /* 2504 * Truncate to maximum data segment length. 2505 */ 2506 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2507 ("ip_data_len %zd >= max_data_segment_length %zd", 2508 response->ip_data_len, cs->cs_max_data_segment_length)); 2509 if (response->ip_data_len + len > 2510 cs->cs_max_data_segment_length) { 2511 len = cs->cs_max_data_segment_length - 2512 response->ip_data_len; 2513 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2514 len, sg_len)); 2515 } 2516 2517 /* 2518 * Truncate to expected data transfer length. 2519 */ 2520 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2521 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2522 buffer_offset, response->ip_data_len, expected_len)); 2523 if (buffer_offset + response->ip_data_len + len > expected_len) { 2524 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2525 "to expected data transfer length %zd", 2526 buffer_offset + response->ip_data_len + len, expected_len); 2527 len = expected_len - (buffer_offset + response->ip_data_len); 2528 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2529 len, sg_len)); 2530 } 2531 2532 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2533 if (error != 0) { 2534 CFISCSI_SESSION_WARN(cs, "failed to " 2535 "allocate memory; dropping connection"); 2536 icl_pdu_free(response); 2537 ctl_set_busy(&io->scsiio); 2538 io->scsiio.be_move_done(io); 2539 cfiscsi_session_terminate(cs); 2540 return; 2541 } 2542 sg_addr += len; 2543 sg_len -= len; 2544 2545 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2546 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2547 buffer_offset, response->ip_data_len, expected_len)); 2548 if (buffer_offset + response->ip_data_len == expected_len) { 2549 /* 2550 * Already have the amount of data the initiator wanted. 2551 */ 2552 break; 2553 } 2554 2555 if (sg_len == 0) { 2556 /* 2557 * End of scatter-gather segment; 2558 * proceed to the next one... 2559 */ 2560 if (i == ctl_sg_count - 1) { 2561 /* 2562 * ... unless this was the last one. 2563 */ 2564 break; 2565 } 2566 i++; 2567 } 2568 2569 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2570 /* 2571 * Can't stuff more data into the current PDU; 2572 * queue it. Note that's not enough to check 2573 * for kern_data_resid == 0 instead; there 2574 * may be several Data-In PDUs for the final 2575 * call to cfiscsi_datamove(), and we want 2576 * to set the F flag only on the last of them. 2577 */ 2578 buffer_offset += response->ip_data_len; 2579 if (buffer_offset == io->scsiio.kern_total_len || 2580 buffer_offset == expected_len) { 2581 buffer_offset -= response->ip_data_len; 2582 break; 2583 } 2584 cfiscsi_pdu_queue(response); 2585 response = NULL; 2586 bhsdi = NULL; 2587 } 2588 } 2589 if (response != NULL) { 2590 buffer_offset += response->ip_data_len; 2591 if (buffer_offset == io->scsiio.kern_total_len || 2592 buffer_offset == expected_len) { 2593 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2594 if (io->io_hdr.status == CTL_SUCCESS) { 2595 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2596 if (PDU_TOTAL_TRANSFER_LEN(request) < 2597 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2598 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2599 bhsdi->bhsdi_residual_count = 2600 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2601 PDU_TOTAL_TRANSFER_LEN(request)); 2602 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2603 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2604 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2605 bhsdi->bhsdi_residual_count = 2606 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2607 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2608 } 2609 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2610 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2611 } 2612 } 2613 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2614 cfiscsi_pdu_queue(response); 2615 } 2616 2617 io->scsiio.be_move_done(io); 2618} 2619 2620static void 2621cfiscsi_datamove_out(union ctl_io *io) 2622{ 2623 struct cfiscsi_session *cs; 2624 struct icl_pdu *request, *response; 2625 const struct iscsi_bhs_scsi_command *bhssc; 2626 struct iscsi_bhs_r2t *bhsr2t; 2627 struct cfiscsi_data_wait *cdw; 2628 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2629 uint32_t expected_len, r2t_off, r2t_len; 2630 uint32_t target_transfer_tag; 2631 bool done; 2632 2633 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2634 cs = PDU_SESSION(request); 2635 2636 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2637 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2638 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2639 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2640 2641 /* 2642 * We need to record it so that we can properly report 2643 * underflow/underflow. 2644 */ 2645 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2646 2647 /* 2648 * Report write underflow as error since CTL and backends don't 2649 * really support it, and SCSI does not tell how to do it right. 2650 */ 2651 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2652 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2653 expected_len) { 2654 io->scsiio.io_hdr.port_status = 43; 2655 io->scsiio.be_move_done(io); 2656 return; 2657 } 2658 2659 target_transfer_tag = 2660 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2661 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2662 &target_transfer_tag); 2663 if (cdw == NULL) { 2664 CFISCSI_SESSION_WARN(cs, "failed to " 2665 "allocate memory; dropping connection"); 2666 ctl_set_busy(&io->scsiio); 2667 io->scsiio.be_move_done(io); 2668 cfiscsi_session_terminate(cs); 2669 return; 2670 } 2671#if 0 2672 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2673 "task tag 0x%x, target transfer tag 0x%x", 2674 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2675#endif 2676 2677 cdw->cdw_ctl_io = io; 2678 cdw->cdw_target_transfer_tag = target_transfer_tag; 2679 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2680 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2681 cdw->cdw_datasn = 0; 2682 2683 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2684 if (io->scsiio.kern_sg_entries > 0) { 2685 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2686 } else { 2687 ctl_sglist = &ctl_sg_entry; 2688 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2689 ctl_sglist->len = io->scsiio.kern_data_len; 2690 } 2691 cdw->cdw_sg_index = 0; 2692 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2693 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2694 r2t_off = io->scsiio.ext_data_filled; 2695 while (r2t_off > 0) { 2696 if (r2t_off >= cdw->cdw_sg_len) { 2697 r2t_off -= cdw->cdw_sg_len; 2698 cdw->cdw_sg_index++; 2699 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2700 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2701 continue; 2702 } 2703 cdw->cdw_sg_addr += r2t_off; 2704 cdw->cdw_sg_len -= r2t_off; 2705 r2t_off = 0; 2706 } 2707 2708 if (cs->cs_immediate_data && 2709 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2710 icl_pdu_data_segment_length(request)) { 2711 done = cfiscsi_handle_data_segment(request, cdw); 2712 if (done) { 2713 cfiscsi_data_wait_free(cs, cdw); 2714 io->scsiio.be_move_done(io); 2715 return; 2716 } 2717 } 2718 2719 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2720 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2721 cs->cs_max_burst_length); 2722 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2723 2724 CFISCSI_SESSION_LOCK(cs); 2725 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2726 CFISCSI_SESSION_UNLOCK(cs); 2727 2728 /* 2729 * XXX: We should limit the number of outstanding R2T PDUs 2730 * per task to MaxOutstandingR2T. 2731 */ 2732 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2733 if (response == NULL) { 2734 CFISCSI_SESSION_WARN(cs, "failed to " 2735 "allocate memory; dropping connection"); 2736 ctl_set_busy(&io->scsiio); 2737 io->scsiio.be_move_done(io); 2738 cfiscsi_session_terminate(cs); 2739 return; 2740 } 2741 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2742 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2743 bhsr2t->bhsr2t_flags = 0x80; 2744 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2745 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2746 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2747 /* 2748 * XXX: Here we assume that cfiscsi_datamove() won't ever 2749 * be running concurrently on several CPUs for a given 2750 * command. 2751 */ 2752 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2753 PDU_R2TSN(request)++; 2754 /* 2755 * This is the offset within the current SCSI command; 2756 * i.e. for the first call of datamove(), it will be 0, 2757 * and for subsequent ones it will be the sum of lengths 2758 * of previous ones. 2759 * 2760 * The ext_data_filled is to account for unsolicited 2761 * (immediate) data that might have already arrived. 2762 */ 2763 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2764 /* 2765 * This is the total length (sum of S/G lengths) this call 2766 * to cfiscsi_datamove() is supposed to handle, limited by 2767 * MaxBurstLength. 2768 */ 2769 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2770 cfiscsi_pdu_queue(response); 2771} 2772 2773static void 2774cfiscsi_datamove(union ctl_io *io) 2775{ 2776 2777 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2778 cfiscsi_datamove_in(io); 2779 else { 2780 /* We hadn't received anything during this datamove yet. */ 2781 io->scsiio.ext_data_filled = 0; 2782 cfiscsi_datamove_out(io); 2783 } 2784} 2785 2786static void 2787cfiscsi_scsi_command_done(union ctl_io *io) 2788{ 2789 struct icl_pdu *request, *response; 2790 struct iscsi_bhs_scsi_command *bhssc; 2791 struct iscsi_bhs_scsi_response *bhssr; 2792#ifdef DIAGNOSTIC 2793 struct cfiscsi_data_wait *cdw; 2794#endif 2795 struct cfiscsi_session *cs; 2796 uint16_t sense_length; 2797 2798 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2799 cs = PDU_SESSION(request); 2800 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2801 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2802 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2803 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2804 2805 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2806 // bhssc->bhssc_initiator_task_tag); 2807 2808#ifdef DIAGNOSTIC 2809 CFISCSI_SESSION_LOCK(cs); 2810 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2811 KASSERT(bhssc->bhssc_initiator_task_tag != 2812 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2813 CFISCSI_SESSION_UNLOCK(cs); 2814#endif 2815 2816 /* 2817 * Do not return status for aborted commands. 2818 * There are exceptions, but none supported by CTL yet. 2819 */ 2820 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2821 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2822 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2823 ctl_free_io(io); 2824 icl_pdu_free(request); 2825 return; 2826 } 2827 2828 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2829 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2830 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2831 bhssr->bhssr_flags = 0x80; 2832 /* 2833 * XXX: We don't deal with bidirectional under/overflows; 2834 * does anything actually support those? 2835 */ 2836 if (PDU_TOTAL_TRANSFER_LEN(request) < 2837 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2838 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2839 bhssr->bhssr_residual_count = 2840 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2841 PDU_TOTAL_TRANSFER_LEN(request)); 2842 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2843 // ntohl(bhssr->bhssr_residual_count)); 2844 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2845 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2846 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2847 bhssr->bhssr_residual_count = 2848 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2849 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2850 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2851 // ntohl(bhssr->bhssr_residual_count)); 2852 } 2853 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2854 bhssr->bhssr_status = io->scsiio.scsi_status; 2855 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2856 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2857 2858 if (io->scsiio.sense_len > 0) { 2859#if 0 2860 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2861 io->scsiio.sense_len); 2862#endif 2863 sense_length = htons(io->scsiio.sense_len); 2864 icl_pdu_append_data(response, 2865 &sense_length, sizeof(sense_length), M_WAITOK); 2866 icl_pdu_append_data(response, 2867 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2868 } 2869 2870 ctl_free_io(io); 2871 icl_pdu_free(request); 2872 cfiscsi_pdu_queue(response); 2873} 2874 2875static void 2876cfiscsi_task_management_done(union ctl_io *io) 2877{ 2878 struct icl_pdu *request, *response; 2879 struct iscsi_bhs_task_management_request *bhstmr; 2880 struct iscsi_bhs_task_management_response *bhstmr2; 2881 struct cfiscsi_data_wait *cdw, *tmpcdw; 2882 struct cfiscsi_session *cs, *tcs; 2883 struct cfiscsi_softc *softc; 2884 int cold_reset = 0; 2885 2886 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2887 cs = PDU_SESSION(request); 2888 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2889 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2890 ISCSI_BHS_OPCODE_TASK_REQUEST, 2891 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2892 2893#if 0 2894 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2895 bhstmr->bhstmr_initiator_task_tag, 2896 bhstmr->bhstmr_referenced_task_tag); 2897#endif 2898 2899 if ((bhstmr->bhstmr_function & ~0x80) == 2900 BHSTMR_FUNCTION_ABORT_TASK) { 2901 /* 2902 * Make sure we no longer wait for Data-Out for this command. 2903 */ 2904 CFISCSI_SESSION_LOCK(cs); 2905 TAILQ_FOREACH_SAFE(cdw, 2906 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2907 if (bhstmr->bhstmr_referenced_task_tag != 2908 cdw->cdw_initiator_task_tag) 2909 continue; 2910 2911#if 0 2912 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2913 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2914#endif 2915 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2916 cdw, cdw_next); 2917 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2918 cfiscsi_data_wait_free(cs, cdw); 2919 } 2920 CFISCSI_SESSION_UNLOCK(cs); 2921 } 2922 if ((bhstmr->bhstmr_function & ~0x80) == 2923 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2924 io->io_hdr.status == CTL_SUCCESS) 2925 cold_reset = 1; 2926 2927 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2928 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2929 response->ip_bhs; 2930 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2931 bhstmr2->bhstmr_flags = 0x80; 2932 switch (io->taskio.task_status) { 2933 case CTL_TASK_FUNCTION_COMPLETE: 2934 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2935 break; 2936 case CTL_TASK_FUNCTION_SUCCEEDED: 2937 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2938 break; 2939 case CTL_TASK_LUN_DOES_NOT_EXIST: 2940 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2941 break; 2942 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2943 default: 2944 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2945 break; 2946 } 2947 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2948 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2949 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2950 2951 ctl_free_io(io); 2952 icl_pdu_free(request); 2953 cfiscsi_pdu_queue(response); 2954 2955 if (cold_reset) { 2956 softc = cs->cs_target->ct_softc; 2957 mtx_lock(&softc->lock); 2958 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2959 if (tcs->cs_target == cs->cs_target) 2960 cfiscsi_session_terminate(tcs); 2961 } 2962 mtx_unlock(&softc->lock); 2963 } 2964} 2965 2966static void 2967cfiscsi_done(union ctl_io *io) 2968{ 2969 struct icl_pdu *request; 2970 struct cfiscsi_session *cs; 2971 2972 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2973 ("invalid CTL status %#x", io->io_hdr.status)); 2974 2975 if (io->io_hdr.io_type == CTL_IO_TASK && 2976 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2977 /* 2978 * Implicit task termination has just completed; nothing to do. 2979 */ 2980 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2981 cs->cs_tasks_aborted = true; 2982 refcount_release(&cs->cs_outstanding_ctl_pdus); 2983 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2984 ctl_free_io(io); 2985 return; 2986 } 2987 2988 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2989 cs = PDU_SESSION(request); 2990 refcount_release(&cs->cs_outstanding_ctl_pdus); 2991 2992 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2993 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2994 cfiscsi_scsi_command_done(io); 2995 break; 2996 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2997 cfiscsi_task_management_done(io); 2998 break; 2999 default: 3000 panic("cfiscsi_done called with wrong opcode 0x%x", 3001 request->ip_bhs->bhs_opcode); 3002 } 3003} 3004