ctl_frontend_iscsi.c revision 274703
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 274703 2014-11-19 08:59:49Z trasz $ 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 274703 2014-11-19 08:59:49Z trasz $"); 38 39#include <sys/param.h> 40#include <sys/capsicum.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include <dev/iscsi/icl.h> 71#include <dev/iscsi/iscsi_proto.h> 72#include <cam/ctl/ctl_frontend_iscsi.h> 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 1; 88SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 89 &debug, 1, "Enable debug messages"); 90static int ping_timeout = 5; 91SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 92 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 93static int login_timeout = 60; 94SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 95 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 96static int maxcmdsn_delta = 256; 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 98 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 99 "without confirmation"); 100 101#define CFISCSI_DEBUG(X, ...) \ 102 do { \ 103 if (debug > 1) { \ 104 printf("%s: " X "\n", \ 105 __func__, ## __VA_ARGS__); \ 106 } \ 107 } while (0) 108 109#define CFISCSI_WARN(X, ...) \ 110 do { \ 111 if (debug > 0) { \ 112 printf("WARNING: %s: " X "\n", \ 113 __func__, ## __VA_ARGS__); \ 114 } \ 115 } while (0) 116 117#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 118 do { \ 119 if (debug > 1) { \ 120 printf("%s: %s (%s): " X "\n", \ 121 __func__, S->cs_initiator_addr, \ 122 S->cs_initiator_name, ## __VA_ARGS__); \ 123 } \ 124 } while (0) 125 126#define CFISCSI_SESSION_WARN(S, X, ...) \ 127 do { \ 128 if (debug > 0) { \ 129 printf("WARNING: %s (%s): " X "\n", \ 130 S->cs_initiator_addr, \ 131 S->cs_initiator_name, ## __VA_ARGS__); \ 132 } \ 133 } while (0) 134 135#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 136#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 137#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 138 139#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 140#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 141#define PDU_EXPDATASN(X) (X)->ip_prv0 142#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 143#define PDU_R2TSN(X) (X)->ip_prv2 144 145int cfiscsi_init(void); 146static void cfiscsi_online(void *arg); 147static void cfiscsi_offline(void *arg); 148static int cfiscsi_info(void *arg, struct sbuf *sb); 149static int cfiscsi_lun_enable(void *arg, 150 struct ctl_id target_id, int lun_id); 151static int cfiscsi_lun_disable(void *arg, 152 struct ctl_id target_id, int lun_id); 153static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 154static int cfiscsi_ioctl(struct cdev *dev, 155 u_long cmd, caddr_t addr, int flag, struct thread *td); 156static void cfiscsi_datamove(union ctl_io *io); 157static void cfiscsi_datamove_in(union ctl_io *io); 158static void cfiscsi_datamove_out(union ctl_io *io); 159static void cfiscsi_done(union ctl_io *io); 160static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 161static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 162static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 163static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 164static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 165static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 166static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 167static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 168 *softc, const char *name); 169static struct cfiscsi_target *cfiscsi_target_find_or_create( 170 struct cfiscsi_softc *softc, const char *name, const char *alias); 171static void cfiscsi_target_release(struct cfiscsi_target *ct); 172static void cfiscsi_session_delete(struct cfiscsi_session *cs); 173 174static struct cfiscsi_softc cfiscsi_softc; 175extern struct ctl_softc *control_softc; 176 177static struct ctl_frontend cfiscsi_frontend = 178{ 179 .name = "iscsi", 180 .init = cfiscsi_init, 181 .ioctl = cfiscsi_ioctl, 182}; 183CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 184MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 185 186static struct icl_pdu * 187cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 188{ 189 190 return (icl_pdu_new(request->ip_conn, flags)); 191} 192 193static bool 194cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 195{ 196 const struct iscsi_bhs_scsi_command *bhssc; 197 struct cfiscsi_session *cs; 198 uint32_t cmdsn, expstatsn; 199 200 cs = PDU_SESSION(request); 201 202 /* 203 * Every incoming PDU - not just NOP-Out - resets the ping timer. 204 * The purpose of the timeout is to reset the connection when it stalls; 205 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 206 * in some queue. 207 * 208 * XXX: Locking? 209 */ 210 cs->cs_timeout = 0; 211 212 /* 213 * Data-Out PDUs don't contain CmdSN. 214 */ 215 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 216 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 217 return (false); 218 219 /* 220 * We're only using fields common for all the request 221 * (initiator -> target) PDUs. 222 */ 223 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 224 cmdsn = ntohl(bhssc->bhssc_cmdsn); 225 expstatsn = ntohl(bhssc->bhssc_expstatsn); 226 227 CFISCSI_SESSION_LOCK(cs); 228#if 0 229 if (expstatsn != cs->cs_statsn) { 230 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 231 "while current StatSN is %d", expstatsn, 232 cs->cs_statsn); 233 } 234#endif 235 236 /* 237 * The target MUST silently ignore any non-immediate command outside 238 * of this range. 239 */ 240 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 241 CFISCSI_SESSION_UNLOCK(cs); 242 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 243 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 244 return (true); 245 } 246 247 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 248 cs->cs_cmdsn++; 249 250 CFISCSI_SESSION_UNLOCK(cs); 251 252 return (false); 253} 254 255static void 256cfiscsi_pdu_handle(struct icl_pdu *request) 257{ 258 struct cfiscsi_session *cs; 259 bool ignore; 260 261 cs = PDU_SESSION(request); 262 263 ignore = cfiscsi_pdu_update_cmdsn(request); 264 if (ignore) { 265 icl_pdu_free(request); 266 return; 267 } 268 269 /* 270 * Handle the PDU; this includes e.g. receiving the remaining 271 * part of PDU and submitting the SCSI command to CTL 272 * or queueing a reply. The handling routine is responsible 273 * for freeing the PDU when it's no longer needed. 274 */ 275 switch (request->ip_bhs->bhs_opcode & 276 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 277 case ISCSI_BHS_OPCODE_NOP_OUT: 278 cfiscsi_pdu_handle_nop_out(request); 279 break; 280 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 281 cfiscsi_pdu_handle_scsi_command(request); 282 break; 283 case ISCSI_BHS_OPCODE_TASK_REQUEST: 284 cfiscsi_pdu_handle_task_request(request); 285 break; 286 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 287 cfiscsi_pdu_handle_data_out(request); 288 break; 289 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 290 cfiscsi_pdu_handle_logout_request(request); 291 break; 292 default: 293 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 294 "opcode 0x%x; dropping connection", 295 request->ip_bhs->bhs_opcode); 296 icl_pdu_free(request); 297 cfiscsi_session_terminate(cs); 298 } 299 300} 301 302static void 303cfiscsi_receive_callback(struct icl_pdu *request) 304{ 305 struct cfiscsi_session *cs; 306 307 cs = PDU_SESSION(request); 308 309#ifdef ICL_KERNEL_PROXY 310 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 311 if (cs->cs_login_pdu == NULL) 312 cs->cs_login_pdu = request; 313 else 314 icl_pdu_free(request); 315 cv_signal(&cs->cs_login_cv); 316 return; 317 } 318#endif 319 320 cfiscsi_pdu_handle(request); 321} 322 323static void 324cfiscsi_error_callback(struct icl_conn *ic) 325{ 326 struct cfiscsi_session *cs; 327 328 cs = CONN_SESSION(ic); 329 330 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 331 cfiscsi_session_terminate(cs); 332} 333 334static int 335cfiscsi_pdu_prepare(struct icl_pdu *response) 336{ 337 struct cfiscsi_session *cs; 338 struct iscsi_bhs_scsi_response *bhssr; 339 bool advance_statsn = true; 340 341 cs = PDU_SESSION(response); 342 343 CFISCSI_SESSION_LOCK_ASSERT(cs); 344 345 /* 346 * We're only using fields common for all the response 347 * (target -> initiator) PDUs. 348 */ 349 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 350 351 /* 352 * 10.8.3: "The StatSN for this connection is not advanced 353 * after this PDU is sent." 354 */ 355 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 356 advance_statsn = false; 357 358 /* 359 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 360 * StatSN for the connection is not advanced after this PDU is sent." 361 */ 362 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 363 bhssr->bhssr_initiator_task_tag == 0xffffffff) 364 advance_statsn = false; 365 366 /* 367 * See the comment below - StatSN is not meaningful and must 368 * not be advanced. 369 */ 370 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 371 advance_statsn = false; 372 373 /* 374 * 10.7.3: "The fields StatSN, Status, and Residual Count 375 * only have meaningful content if the S bit is set to 1." 376 */ 377 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 378 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 379 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 380 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 381 382 if (advance_statsn) 383 cs->cs_statsn++; 384 385 return (0); 386} 387 388static void 389cfiscsi_pdu_queue(struct icl_pdu *response) 390{ 391 struct cfiscsi_session *cs; 392 393 cs = PDU_SESSION(response); 394 395 CFISCSI_SESSION_LOCK(cs); 396 cfiscsi_pdu_prepare(response); 397 icl_pdu_queue(response); 398 CFISCSI_SESSION_UNLOCK(cs); 399} 400 401static uint32_t 402cfiscsi_decode_lun(uint64_t encoded) 403{ 404 uint8_t lun[8]; 405 uint32_t result; 406 407 /* 408 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 409 * but is in fact an evil, multidimensional structure defined 410 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 411 */ 412 memcpy(lun, &encoded, sizeof(lun)); 413 switch (lun[0] & 0xC0) { 414 case 0x00: 415 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 416 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 417 CFISCSI_WARN("malformed LUN " 418 "(peripheral device addressing method): 0x%jx", 419 (uintmax_t)encoded); 420 result = 0xffffffff; 421 break; 422 } 423 result = lun[1]; 424 break; 425 case 0x40: 426 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 427 lun[6] != 0 || lun[7] != 0) { 428 CFISCSI_WARN("malformed LUN " 429 "(flat address space addressing method): 0x%jx", 430 (uintmax_t)encoded); 431 result = 0xffffffff; 432 break; 433 } 434 result = ((lun[0] & 0x3f) << 8) + lun[1]; 435 break; 436 case 0xC0: 437 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 438 lun[6] != 0 || lun[7] != 0) { 439 CFISCSI_WARN("malformed LUN (extended flat " 440 "address space addressing method): 0x%jx", 441 (uintmax_t)encoded); 442 result = 0xffffffff; 443 break; 444 } 445 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 446 default: 447 CFISCSI_WARN("unsupported LUN format 0x%jx", 448 (uintmax_t)encoded); 449 result = 0xffffffff; 450 break; 451 } 452 453 return (result); 454} 455 456static void 457cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 458{ 459 struct cfiscsi_session *cs; 460 struct iscsi_bhs_nop_out *bhsno; 461 struct iscsi_bhs_nop_in *bhsni; 462 struct icl_pdu *response; 463 void *data = NULL; 464 size_t datasize; 465 int error; 466 467 cs = PDU_SESSION(request); 468 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 469 470 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 471 /* 472 * Nothing to do, iscsi_pdu_update_statsn() already 473 * zeroed the timeout. 474 */ 475 icl_pdu_free(request); 476 return; 477 } 478 479 datasize = icl_pdu_data_segment_length(request); 480 if (datasize > 0) { 481 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 482 if (data == NULL) { 483 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 484 "dropping connection"); 485 icl_pdu_free(request); 486 cfiscsi_session_terminate(cs); 487 return; 488 } 489 icl_pdu_get_data(request, 0, data, datasize); 490 } 491 492 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 493 if (response == NULL) { 494 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 495 "droppping connection"); 496 free(data, M_CFISCSI); 497 icl_pdu_free(request); 498 cfiscsi_session_terminate(cs); 499 return; 500 } 501 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 502 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 503 bhsni->bhsni_flags = 0x80; 504 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 505 bhsni->bhsni_target_transfer_tag = 0xffffffff; 506 if (datasize > 0) { 507 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 508 if (error != 0) { 509 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 510 "dropping connection"); 511 free(data, M_CFISCSI); 512 icl_pdu_free(request); 513 icl_pdu_free(response); 514 cfiscsi_session_terminate(cs); 515 return; 516 } 517 free(data, M_CFISCSI); 518 } 519 520 icl_pdu_free(request); 521 cfiscsi_pdu_queue(response); 522} 523 524static void 525cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 526{ 527 struct iscsi_bhs_scsi_command *bhssc; 528 struct cfiscsi_session *cs; 529 union ctl_io *io; 530 int error; 531 532 cs = PDU_SESSION(request); 533 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 534 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 535 // bhssc->bhssc_initiator_task_tag); 536 537 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 538 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 539 "ImmediateData=No; dropping connection"); 540 icl_pdu_free(request); 541 cfiscsi_session_terminate(cs); 542 return; 543 } 544 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 545 if (io == NULL) { 546 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 547 "dropping connection"); 548 icl_pdu_free(request); 549 cfiscsi_session_terminate(cs); 550 return; 551 } 552 ctl_zero_io(io); 553 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 554 io->io_hdr.io_type = CTL_IO_SCSI; 555 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 556 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 557 io->io_hdr.nexus.targ_target.id = 0; 558 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 559 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 560 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 561 case BHSSC_FLAGS_ATTR_UNTAGGED: 562 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 563 break; 564 case BHSSC_FLAGS_ATTR_SIMPLE: 565 io->scsiio.tag_type = CTL_TAG_SIMPLE; 566 break; 567 case BHSSC_FLAGS_ATTR_ORDERED: 568 io->scsiio.tag_type = CTL_TAG_ORDERED; 569 break; 570 case BHSSC_FLAGS_ATTR_HOQ: 571 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 572 break; 573 case BHSSC_FLAGS_ATTR_ACA: 574 io->scsiio.tag_type = CTL_TAG_ACA; 575 break; 576 default: 577 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 578 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 579 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 580 break; 581 } 582 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 583 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 584 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 585 error = ctl_queue(io); 586 if (error != CTL_RETVAL_COMPLETE) { 587 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 588 "dropping connection", error); 589 ctl_free_io(io); 590 refcount_release(&cs->cs_outstanding_ctl_pdus); 591 icl_pdu_free(request); 592 cfiscsi_session_terminate(cs); 593 } 594} 595 596static void 597cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 598{ 599 struct iscsi_bhs_task_management_request *bhstmr; 600 struct iscsi_bhs_task_management_response *bhstmr2; 601 struct icl_pdu *response; 602 struct cfiscsi_session *cs; 603 union ctl_io *io; 604 int error; 605 606 cs = PDU_SESSION(request); 607 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 608 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 609 if (io == NULL) { 610 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 611 "dropping connection"); 612 icl_pdu_free(request); 613 cfiscsi_session_terminate(cs); 614 return; 615 } 616 ctl_zero_io(io); 617 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 618 io->io_hdr.io_type = CTL_IO_TASK; 619 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 620 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 621 io->io_hdr.nexus.targ_target.id = 0; 622 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 623 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 624 625 switch (bhstmr->bhstmr_function & ~0x80) { 626 case BHSTMR_FUNCTION_ABORT_TASK: 627#if 0 628 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 629#endif 630 io->taskio.task_action = CTL_TASK_ABORT_TASK; 631 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 632 break; 633 case BHSTMR_FUNCTION_ABORT_TASK_SET: 634#if 0 635 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 636#endif 637 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 638 break; 639 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 640#if 0 641 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 642#endif 643 io->taskio.task_action = CTL_TASK_LUN_RESET; 644 break; 645 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 646#if 0 647 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 648#endif 649 io->taskio.task_action = CTL_TASK_TARGET_RESET; 650 break; 651 default: 652 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 653 bhstmr->bhstmr_function & ~0x80); 654 ctl_free_io(io); 655 656 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 657 if (response == NULL) { 658 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 659 "dropping connection"); 660 icl_pdu_free(request); 661 cfiscsi_session_terminate(cs); 662 return; 663 } 664 bhstmr2 = (struct iscsi_bhs_task_management_response *) 665 response->ip_bhs; 666 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 667 bhstmr2->bhstmr_flags = 0x80; 668 bhstmr2->bhstmr_response = 669 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 670 bhstmr2->bhstmr_initiator_task_tag = 671 bhstmr->bhstmr_initiator_task_tag; 672 icl_pdu_free(request); 673 cfiscsi_pdu_queue(response); 674 return; 675 } 676 677 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 678 error = ctl_queue(io); 679 if (error != CTL_RETVAL_COMPLETE) { 680 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 681 "dropping connection", error); 682 ctl_free_io(io); 683 refcount_release(&cs->cs_outstanding_ctl_pdus); 684 icl_pdu_free(request); 685 cfiscsi_session_terminate(cs); 686 } 687} 688 689static bool 690cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 691{ 692 struct iscsi_bhs_data_out *bhsdo; 693 struct cfiscsi_session *cs; 694 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 695 size_t copy_len, len, off, buffer_offset; 696 int ctl_sg_count; 697 union ctl_io *io; 698 699 cs = PDU_SESSION(request); 700 701 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 702 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 703 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 704 ISCSI_BHS_OPCODE_SCSI_COMMAND, 705 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 706 707 /* 708 * We're only using fields common for Data-Out and SCSI Command PDUs. 709 */ 710 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 711 712 io = cdw->cdw_ctl_io; 713 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 714 ("CTL_FLAG_DATA_IN")); 715 716#if 0 717 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 718 request->ip_data_len, io->scsiio.kern_total_len); 719#endif 720 721 if (io->scsiio.kern_sg_entries > 0) { 722 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 723 ctl_sg_count = io->scsiio.kern_sg_entries; 724 } else { 725 ctl_sglist = &ctl_sg_entry; 726 ctl_sglist->addr = io->scsiio.kern_data_ptr; 727 ctl_sglist->len = io->scsiio.kern_data_len; 728 ctl_sg_count = 1; 729 } 730 731 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 732 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 733 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 734 else 735 buffer_offset = 0; 736 len = icl_pdu_data_segment_length(request); 737 738 /* 739 * Make sure the offset, as sent by the initiator, matches the offset 740 * we're supposed to be at in the scatter-gather list. 741 */ 742 if (buffer_offset > 743 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 744 buffer_offset + len <= 745 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 746 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 747 "expected %zd; dropping connection", buffer_offset, 748 (size_t)io->scsiio.kern_rel_offset + 749 (size_t)io->scsiio.ext_data_filled); 750 ctl_set_data_phase_error(&io->scsiio); 751 cfiscsi_session_terminate(cs); 752 return (true); 753 } 754 755 /* 756 * This is the offset within the PDU data segment, as opposed 757 * to buffer_offset, which is the offset within the task (SCSI 758 * command). 759 */ 760 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 761 buffer_offset; 762 763 /* 764 * Iterate over the scatter/gather segments, filling them with data 765 * from the PDU data segment. Note that this can get called multiple 766 * times for one SCSI command; the cdw structure holds state for the 767 * scatter/gather list. 768 */ 769 for (;;) { 770 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 771 ("cdw->cdw_sg_index >= ctl_sg_count")); 772 if (cdw->cdw_sg_len == 0) { 773 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 774 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 775 } 776 KASSERT(off <= len, ("len > off")); 777 copy_len = len - off; 778 if (copy_len > cdw->cdw_sg_len) 779 copy_len = cdw->cdw_sg_len; 780 781 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 782 cdw->cdw_sg_addr += copy_len; 783 cdw->cdw_sg_len -= copy_len; 784 off += copy_len; 785 io->scsiio.ext_data_filled += copy_len; 786 787 if (cdw->cdw_sg_len == 0) { 788 /* 789 * End of current segment. 790 */ 791 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 792 /* 793 * Last segment in scatter/gather list. 794 */ 795 break; 796 } 797 cdw->cdw_sg_index++; 798 } 799 800 if (off == len) { 801 /* 802 * End of PDU payload. 803 */ 804 break; 805 } 806 } 807 808 if (len > off) { 809 /* 810 * In case of unsolicited data, it's possible that the buffer 811 * provided by CTL is smaller than negotiated FirstBurstLength. 812 * Just ignore the superfluous data; will ask for them with R2T 813 * on next call to cfiscsi_datamove(). 814 * 815 * This obviously can only happen with SCSI Command PDU. 816 */ 817 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 818 ISCSI_BHS_OPCODE_SCSI_COMMAND) 819 return (true); 820 821 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 822 "expected %zd; dropping connection", 823 icl_pdu_data_segment_length(request), off); 824 ctl_set_data_phase_error(&io->scsiio); 825 cfiscsi_session_terminate(cs); 826 return (true); 827 } 828 829 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 830 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 831 CFISCSI_SESSION_WARN(cs, "got the final packet without " 832 "the F flag; flags = 0x%x; dropping connection", 833 bhsdo->bhsdo_flags); 834 ctl_set_data_phase_error(&io->scsiio); 835 cfiscsi_session_terminate(cs); 836 return (true); 837 } 838 839 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 840 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 841 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 842 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 843 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 844 "transmitted size was %zd bytes instead of %d; " 845 "dropping connection", 846 (size_t)io->scsiio.ext_data_filled, 847 cdw->cdw_r2t_end); 848 ctl_set_data_phase_error(&io->scsiio); 849 cfiscsi_session_terminate(cs); 850 return (true); 851 } else { 852 /* 853 * For SCSI Command PDU, this just means we need to 854 * solicit more data by sending R2T. 855 */ 856 return (false); 857 } 858 } 859 860 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 861#if 0 862 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 863 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 864#endif 865 866 return (true); 867 } 868 869 return (false); 870} 871 872static void 873cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 874{ 875 struct iscsi_bhs_data_out *bhsdo; 876 struct cfiscsi_session *cs; 877 struct cfiscsi_data_wait *cdw = NULL; 878 union ctl_io *io; 879 bool done; 880 881 cs = PDU_SESSION(request); 882 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 883 884 CFISCSI_SESSION_LOCK(cs); 885 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 886#if 0 887 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 888 "ttt 0x%x, itt 0x%x", 889 bhsdo->bhsdo_target_transfer_tag, 890 bhsdo->bhsdo_initiator_task_tag, 891 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 892#endif 893 if (bhsdo->bhsdo_target_transfer_tag == 894 cdw->cdw_target_transfer_tag) 895 break; 896 } 897 CFISCSI_SESSION_UNLOCK(cs); 898 if (cdw == NULL) { 899 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 900 "0x%x, not found; dropping connection", 901 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 902 icl_pdu_free(request); 903 cfiscsi_session_terminate(cs); 904 return; 905 } 906 907 io = cdw->cdw_ctl_io; 908 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 909 ("CTL_FLAG_DATA_IN")); 910 911 done = cfiscsi_handle_data_segment(request, cdw); 912 if (done) { 913 CFISCSI_SESSION_LOCK(cs); 914 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 915 CFISCSI_SESSION_UNLOCK(cs); 916 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 917 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 918 uma_zfree(cfiscsi_data_wait_zone, cdw); 919 if (done) 920 io->scsiio.be_move_done(io); 921 else 922 cfiscsi_datamove_out(io); 923 } 924 925 icl_pdu_free(request); 926} 927 928static void 929cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 930{ 931 struct iscsi_bhs_logout_request *bhslr; 932 struct iscsi_bhs_logout_response *bhslr2; 933 struct icl_pdu *response; 934 struct cfiscsi_session *cs; 935 936 cs = PDU_SESSION(request); 937 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 938 switch (bhslr->bhslr_reason & 0x7f) { 939 case BHSLR_REASON_CLOSE_SESSION: 940 case BHSLR_REASON_CLOSE_CONNECTION: 941 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 942 if (response == NULL) { 943 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 944 icl_pdu_free(request); 945 cfiscsi_session_terminate(cs); 946 return; 947 } 948 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 949 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 950 bhslr2->bhslr_flags = 0x80; 951 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 952 bhslr2->bhslr_initiator_task_tag = 953 bhslr->bhslr_initiator_task_tag; 954 icl_pdu_free(request); 955 cfiscsi_pdu_queue(response); 956 cfiscsi_session_terminate(cs); 957 break; 958 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 959 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 960 if (response == NULL) { 961 CFISCSI_SESSION_WARN(cs, 962 "failed to allocate memory; dropping connection"); 963 icl_pdu_free(request); 964 cfiscsi_session_terminate(cs); 965 return; 966 } 967 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 968 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 969 bhslr2->bhslr_flags = 0x80; 970 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 971 bhslr2->bhslr_initiator_task_tag = 972 bhslr->bhslr_initiator_task_tag; 973 icl_pdu_free(request); 974 cfiscsi_pdu_queue(response); 975 break; 976 default: 977 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 978 bhslr->bhslr_reason); 979 icl_pdu_free(request); 980 cfiscsi_session_terminate(cs); 981 break; 982 } 983} 984 985static void 986cfiscsi_callout(void *context) 987{ 988 struct icl_pdu *cp; 989 struct iscsi_bhs_nop_in *bhsni; 990 struct cfiscsi_session *cs; 991 992 cs = context; 993 994 if (cs->cs_terminating) 995 return; 996 997 callout_schedule(&cs->cs_callout, 1 * hz); 998 999 atomic_add_int(&cs->cs_timeout, 1); 1000 1001#ifdef ICL_KERNEL_PROXY 1002 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1003 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1004 CFISCSI_SESSION_WARN(cs, "login timed out after " 1005 "%d seconds; dropping connection", cs->cs_timeout); 1006 cfiscsi_session_terminate(cs); 1007 } 1008 return; 1009 } 1010#endif 1011 1012 if (ping_timeout <= 0) { 1013 /* 1014 * Pings are disabled. Don't send NOP-In in this case; 1015 * user might have disabled pings to work around problems 1016 * with certain initiators that can't properly handle 1017 * NOP-In, such as iPXE. Reset the timeout, to avoid 1018 * triggering reconnection, should the user decide to 1019 * reenable them. 1020 */ 1021 cs->cs_timeout = 0; 1022 return; 1023 } 1024 1025 if (cs->cs_timeout >= ping_timeout) { 1026 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1027 "dropping connection", ping_timeout); 1028 cfiscsi_session_terminate(cs); 1029 return; 1030 } 1031 1032 /* 1033 * If the ping was reset less than one second ago - which means 1034 * that we've received some PDU during the last second - assume 1035 * the traffic flows correctly and don't bother sending a NOP-Out. 1036 * 1037 * (It's 2 - one for one second, and one for incrementing is_timeout 1038 * earlier in this routine.) 1039 */ 1040 if (cs->cs_timeout < 2) 1041 return; 1042 1043 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1044 if (cp == NULL) { 1045 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1046 return; 1047 } 1048 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1049 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1050 bhsni->bhsni_flags = 0x80; 1051 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1052 1053 cfiscsi_pdu_queue(cp); 1054} 1055 1056static void 1057cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1058{ 1059 struct cfiscsi_data_wait *cdw; 1060 union ctl_io *io; 1061 int error, last; 1062 1063 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1064 if (io == NULL) { 1065 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1066 return; 1067 } 1068 ctl_zero_io(io); 1069 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1070 io->io_hdr.io_type = CTL_IO_TASK; 1071 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1072 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1073 io->io_hdr.nexus.targ_target.id = 0; 1074 io->io_hdr.nexus.targ_lun = 0; 1075 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1076 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1077 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1078 error = ctl_queue(io); 1079 if (error != CTL_RETVAL_COMPLETE) { 1080 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1081 refcount_release(&cs->cs_outstanding_ctl_pdus); 1082 ctl_free_io(io); 1083 } 1084 1085 CFISCSI_SESSION_LOCK(cs); 1086 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1087 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1088 CFISCSI_SESSION_UNLOCK(cs); 1089 /* 1090 * Set nonzero port status; this prevents backends from 1091 * assuming that the data transfer actually succeeded 1092 * and writing uninitialized data to disk. 1093 */ 1094 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1095 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1096 uma_zfree(cfiscsi_data_wait_zone, cdw); 1097 CFISCSI_SESSION_LOCK(cs); 1098 } 1099 CFISCSI_SESSION_UNLOCK(cs); 1100 1101 /* 1102 * Wait for CTL to terminate all the tasks. 1103 */ 1104 for (;;) { 1105 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1106 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1107 if (last != 0) 1108 break; 1109 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, " 1110 "%d remaining", cs->cs_outstanding_ctl_pdus); 1111 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1112 0, "cfiscsi_terminate", hz / 100); 1113 } 1114} 1115 1116static void 1117cfiscsi_maintenance_thread(void *arg) 1118{ 1119 struct cfiscsi_session *cs; 1120 1121 cs = arg; 1122 1123 for (;;) { 1124 CFISCSI_SESSION_LOCK(cs); 1125 if (cs->cs_terminating == false) 1126 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1127 CFISCSI_SESSION_UNLOCK(cs); 1128 1129 if (cs->cs_terminating) { 1130 1131 /* 1132 * We used to wait up to 30 seconds to deliver queued 1133 * PDUs to the initiator. We also tried hard to deliver 1134 * SCSI Responses for the aborted PDUs. We don't do 1135 * that anymore. We might need to revisit that. 1136 */ 1137 callout_drain(&cs->cs_callout); 1138 icl_conn_close(cs->cs_conn); 1139 1140 /* 1141 * At this point ICL receive thread is no longer 1142 * running; no new tasks can be queued. 1143 */ 1144 cfiscsi_session_terminate_tasks(cs); 1145 cfiscsi_session_delete(cs); 1146 kthread_exit(); 1147 return; 1148 } 1149 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1150 } 1151} 1152 1153static void 1154cfiscsi_session_terminate(struct cfiscsi_session *cs) 1155{ 1156 1157 if (cs->cs_terminating) 1158 return; 1159 cs->cs_terminating = true; 1160 cv_signal(&cs->cs_maintenance_cv); 1161#ifdef ICL_KERNEL_PROXY 1162 cv_signal(&cs->cs_login_cv); 1163#endif 1164} 1165 1166static int 1167cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1168{ 1169 struct cfiscsi_target *ct; 1170 char *name; 1171 int i; 1172 1173 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1174 1175 ct = cs->cs_target; 1176 name = strdup(cs->cs_initiator_id, M_CTL); 1177 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1178 if (i < 0) { 1179 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1180 i); 1181 cs->cs_ctl_initid = -1; 1182 return (1); 1183 } 1184 cs->cs_ctl_initid = i; 1185#if 0 1186 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1187#endif 1188 1189 return (0); 1190} 1191 1192static void 1193cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1194{ 1195 int error; 1196 1197 if (cs->cs_ctl_initid == -1) 1198 return; 1199 1200 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1201 if (error != 0) { 1202 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1203 error); 1204 } 1205 cs->cs_ctl_initid = -1; 1206} 1207 1208static struct cfiscsi_session * 1209cfiscsi_session_new(struct cfiscsi_softc *softc) 1210{ 1211 struct cfiscsi_session *cs; 1212 int error; 1213 1214 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1215 if (cs == NULL) { 1216 CFISCSI_WARN("malloc failed"); 1217 return (NULL); 1218 } 1219 cs->cs_ctl_initid = -1; 1220 1221 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1222 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1223 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1224 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1225#ifdef ICL_KERNEL_PROXY 1226 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1227#endif 1228 1229 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1230 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1231 cs->cs_conn->ic_error = cfiscsi_error_callback; 1232 cs->cs_conn->ic_prv0 = cs; 1233 1234 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1235 if (error != 0) { 1236 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1237 free(cs, M_CFISCSI); 1238 return (NULL); 1239 } 1240 1241 mtx_lock(&softc->lock); 1242 cs->cs_id = softc->last_session_id + 1; 1243 softc->last_session_id++; 1244 mtx_unlock(&softc->lock); 1245 1246 mtx_lock(&softc->lock); 1247 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1248 mtx_unlock(&softc->lock); 1249 1250 /* 1251 * Start pinging the initiator. 1252 */ 1253 callout_init(&cs->cs_callout, 1); 1254 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1255 1256 return (cs); 1257} 1258 1259static void 1260cfiscsi_session_delete(struct cfiscsi_session *cs) 1261{ 1262 struct cfiscsi_softc *softc; 1263 1264 softc = &cfiscsi_softc; 1265 1266 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1267 ("destroying session with outstanding CTL pdus")); 1268 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1269 ("destroying session with non-empty queue")); 1270 1271 cfiscsi_session_unregister_initiator(cs); 1272 if (cs->cs_target != NULL) 1273 cfiscsi_target_release(cs->cs_target); 1274 icl_conn_close(cs->cs_conn); 1275 icl_conn_free(cs->cs_conn); 1276 1277 mtx_lock(&softc->lock); 1278 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1279 mtx_unlock(&softc->lock); 1280 1281 free(cs, M_CFISCSI); 1282} 1283 1284int 1285cfiscsi_init(void) 1286{ 1287 struct cfiscsi_softc *softc; 1288 int retval; 1289 1290 softc = &cfiscsi_softc; 1291 retval = 0; 1292 bzero(softc, sizeof(*softc)); 1293 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1294 1295#ifdef ICL_KERNEL_PROXY 1296 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1297#endif 1298 TAILQ_INIT(&softc->sessions); 1299 TAILQ_INIT(&softc->targets); 1300 1301 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1302 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1303 UMA_ALIGN_PTR, 0); 1304 1305 return (0); 1306} 1307 1308#ifdef ICL_KERNEL_PROXY 1309static void 1310cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1311{ 1312 struct cfiscsi_session *cs; 1313 1314 cs = cfiscsi_session_new(&cfiscsi_softc); 1315 if (cs == NULL) { 1316 CFISCSI_WARN("failed to create session"); 1317 return; 1318 } 1319 1320 icl_conn_handoff_sock(cs->cs_conn, so); 1321 cs->cs_initiator_sa = sa; 1322 cs->cs_portal_id = portal_id; 1323 cs->cs_waiting_for_ctld = true; 1324 cv_signal(&cfiscsi_softc.accept_cv); 1325} 1326#endif 1327 1328static void 1329cfiscsi_online(void *arg) 1330{ 1331 struct cfiscsi_softc *softc; 1332 struct cfiscsi_target *ct; 1333 int online; 1334 1335 ct = (struct cfiscsi_target *)arg; 1336 softc = ct->ct_softc; 1337 1338 mtx_lock(&softc->lock); 1339 if (ct->ct_online) { 1340 mtx_unlock(&softc->lock); 1341 return; 1342 } 1343 ct->ct_online = 1; 1344 online = softc->online++; 1345 mtx_unlock(&softc->lock); 1346 if (online > 0) 1347 return; 1348 1349#ifdef ICL_KERNEL_PROXY 1350 if (softc->listener != NULL) 1351 icl_listen_free(softc->listener); 1352 softc->listener = icl_listen_new(cfiscsi_accept); 1353#endif 1354} 1355 1356static void 1357cfiscsi_offline(void *arg) 1358{ 1359 struct cfiscsi_softc *softc; 1360 struct cfiscsi_target *ct; 1361 struct cfiscsi_session *cs; 1362 int online; 1363 1364 ct = (struct cfiscsi_target *)arg; 1365 softc = ct->ct_softc; 1366 1367 mtx_lock(&softc->lock); 1368 if (!ct->ct_online) { 1369 mtx_unlock(&softc->lock); 1370 return; 1371 } 1372 ct->ct_online = 0; 1373 online = --softc->online; 1374 1375 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1376 if (cs->cs_target == ct) 1377 cfiscsi_session_terminate(cs); 1378 } 1379 mtx_unlock(&softc->lock); 1380 if (online > 0) 1381 return; 1382 1383#ifdef ICL_KERNEL_PROXY 1384 icl_listen_free(softc->listener); 1385 softc->listener = NULL; 1386#endif 1387} 1388 1389static int 1390cfiscsi_info(void *arg, struct sbuf *sb) 1391{ 1392 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1393 int retval; 1394 1395 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1396 ct->ct_state); 1397 return (retval); 1398} 1399 1400static void 1401cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1402{ 1403 struct cfiscsi_softc *softc; 1404 struct cfiscsi_session *cs, *cs2; 1405 struct cfiscsi_target *ct; 1406 struct ctl_iscsi_handoff_params *cihp; 1407 int error; 1408 1409 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1410 softc = &cfiscsi_softc; 1411 1412 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1413 cihp->initiator_name, cihp->initiator_addr, 1414 cihp->target_name); 1415 1416 ct = cfiscsi_target_find(softc, cihp->target_name); 1417 if (ct == NULL) { 1418 ci->status = CTL_ISCSI_ERROR; 1419 snprintf(ci->error_str, sizeof(ci->error_str), 1420 "%s: target not found", __func__); 1421 return; 1422 } 1423 1424 if (ct->ct_online == 0) { 1425 ci->status = CTL_ISCSI_ERROR; 1426 snprintf(ci->error_str, sizeof(ci->error_str), 1427 "%s: port offline", __func__); 1428 cfiscsi_target_release(ct); 1429 return; 1430 } 1431 1432#ifdef ICL_KERNEL_PROXY 1433 if (cihp->socket > 0 && cihp->connection_id > 0) { 1434 snprintf(ci->error_str, sizeof(ci->error_str), 1435 "both socket and connection_id set"); 1436 ci->status = CTL_ISCSI_ERROR; 1437 cfiscsi_target_release(ct); 1438 return; 1439 } 1440 if (cihp->socket == 0) { 1441 mtx_lock(&cfiscsi_softc.lock); 1442 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1443 if (cs->cs_id == cihp->socket) 1444 break; 1445 } 1446 if (cs == NULL) { 1447 mtx_unlock(&cfiscsi_softc.lock); 1448 snprintf(ci->error_str, sizeof(ci->error_str), 1449 "connection not found"); 1450 ci->status = CTL_ISCSI_ERROR; 1451 cfiscsi_target_release(ct); 1452 return; 1453 } 1454 mtx_unlock(&cfiscsi_softc.lock); 1455 } else { 1456#endif 1457 cs = cfiscsi_session_new(softc); 1458 if (cs == NULL) { 1459 ci->status = CTL_ISCSI_ERROR; 1460 snprintf(ci->error_str, sizeof(ci->error_str), 1461 "%s: cfiscsi_session_new failed", __func__); 1462 cfiscsi_target_release(ct); 1463 return; 1464 } 1465#ifdef ICL_KERNEL_PROXY 1466 } 1467#endif 1468 cs->cs_target = ct; 1469 1470 /* 1471 * First PDU of Full Feature phase has the same CmdSN as the last 1472 * PDU from the Login Phase received from the initiator. Thus, 1473 * the -1 below. 1474 */ 1475 cs->cs_portal_group_tag = cihp->portal_group_tag; 1476 cs->cs_cmdsn = cihp->cmdsn; 1477 cs->cs_statsn = cihp->statsn; 1478 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1479 cs->cs_max_burst_length = cihp->max_burst_length; 1480 cs->cs_immediate_data = !!cihp->immediate_data; 1481 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1482 cs->cs_conn->ic_header_crc32c = true; 1483 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1484 cs->cs_conn->ic_data_crc32c = true; 1485 1486 strlcpy(cs->cs_initiator_name, 1487 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1488 strlcpy(cs->cs_initiator_addr, 1489 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1490 strlcpy(cs->cs_initiator_alias, 1491 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1492 memcpy(cs->cs_initiator_isid, 1493 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1494 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1495 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1496 cihp->initiator_isid[0], cihp->initiator_isid[1], 1497 cihp->initiator_isid[2], cihp->initiator_isid[3], 1498 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1499 1500 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1501restart: 1502 if (!cs->cs_terminating) { 1503 mtx_lock(&softc->lock); 1504 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1505 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1506 cs->cs_target == cs2->cs_target && 1507 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1508 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1509 cfiscsi_session_terminate(cs2); 1510 mtx_unlock(&softc->lock); 1511 pause("cfiscsi_reinstate", 1); 1512 goto restart; 1513 } 1514 } 1515 mtx_unlock(&softc->lock); 1516 } 1517 1518 /* 1519 * Register initiator with CTL. 1520 */ 1521 cfiscsi_session_register_initiator(cs); 1522 1523#ifdef ICL_KERNEL_PROXY 1524 if (cihp->socket > 0) { 1525#endif 1526 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1527 if (error != 0) { 1528 cfiscsi_session_terminate(cs); 1529 refcount_release(&cs->cs_outstanding_ctl_pdus); 1530 ci->status = CTL_ISCSI_ERROR; 1531 snprintf(ci->error_str, sizeof(ci->error_str), 1532 "%s: icl_conn_handoff failed with error %d", 1533 __func__, error); 1534 return; 1535 } 1536#ifdef ICL_KERNEL_PROXY 1537 } 1538#endif 1539 1540#ifdef ICL_KERNEL_PROXY 1541 cs->cs_login_phase = false; 1542 1543 /* 1544 * First PDU of the Full Feature phase has likely already arrived. 1545 * We have to pick it up and execute properly. 1546 */ 1547 if (cs->cs_login_pdu != NULL) { 1548 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1549 cfiscsi_pdu_handle(cs->cs_login_pdu); 1550 cs->cs_login_pdu = NULL; 1551 } 1552#endif 1553 1554 refcount_release(&cs->cs_outstanding_ctl_pdus); 1555 ci->status = CTL_ISCSI_OK; 1556} 1557 1558static void 1559cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1560{ 1561 struct ctl_iscsi_list_params *cilp; 1562 struct cfiscsi_session *cs; 1563 struct cfiscsi_softc *softc; 1564 struct sbuf *sb; 1565 int error; 1566 1567 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1568 softc = &cfiscsi_softc; 1569 1570 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1571 if (sb == NULL) { 1572 ci->status = CTL_ISCSI_ERROR; 1573 snprintf(ci->error_str, sizeof(ci->error_str), 1574 "Unable to allocate %d bytes for iSCSI session list", 1575 cilp->alloc_len); 1576 return; 1577 } 1578 1579 sbuf_printf(sb, "<ctlislist>\n"); 1580 mtx_lock(&softc->lock); 1581 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1582#ifdef ICL_KERNEL_PROXY 1583 if (cs->cs_target == NULL) 1584 continue; 1585#endif 1586 error = sbuf_printf(sb, "<connection id=\"%d\">" 1587 "<initiator>%s</initiator>" 1588 "<initiator_addr>%s</initiator_addr>" 1589 "<initiator_alias>%s</initiator_alias>" 1590 "<target>%s</target>" 1591 "<target_alias>%s</target_alias>" 1592 "<header_digest>%s</header_digest>" 1593 "<data_digest>%s</data_digest>" 1594 "<max_data_segment_length>%zd</max_data_segment_length>" 1595 "<immediate_data>%d</immediate_data>" 1596 "<iser>%d</iser>" 1597 "</connection>\n", 1598 cs->cs_id, 1599 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1600 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1601 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1602 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1603 cs->cs_max_data_segment_length, 1604 cs->cs_immediate_data, 1605 cs->cs_conn->ic_iser); 1606 if (error != 0) 1607 break; 1608 } 1609 mtx_unlock(&softc->lock); 1610 error = sbuf_printf(sb, "</ctlislist>\n"); 1611 if (error != 0) { 1612 sbuf_delete(sb); 1613 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1614 snprintf(ci->error_str, sizeof(ci->error_str), 1615 "Out of space, %d bytes is too small", cilp->alloc_len); 1616 return; 1617 } 1618 sbuf_finish(sb); 1619 1620 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1621 cilp->fill_len = sbuf_len(sb) + 1; 1622 ci->status = CTL_ISCSI_OK; 1623 sbuf_delete(sb); 1624} 1625 1626static void 1627cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1628{ 1629 struct icl_pdu *response; 1630 struct iscsi_bhs_asynchronous_message *bhsam; 1631 struct ctl_iscsi_terminate_params *citp; 1632 struct cfiscsi_session *cs; 1633 struct cfiscsi_softc *softc; 1634 int found = 0; 1635 1636 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1637 softc = &cfiscsi_softc; 1638 1639 mtx_lock(&softc->lock); 1640 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1641 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1642 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1643 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1644 continue; 1645 1646 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1647 if (response == NULL) { 1648 /* 1649 * Oh well. Just terminate the connection. 1650 */ 1651 } else { 1652 bhsam = (struct iscsi_bhs_asynchronous_message *) 1653 response->ip_bhs; 1654 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1655 bhsam->bhsam_flags = 0x80; 1656 bhsam->bhsam_0xffffffff = 0xffffffff; 1657 bhsam->bhsam_async_event = 1658 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1659 cfiscsi_pdu_queue(response); 1660 } 1661 cfiscsi_session_terminate(cs); 1662 found++; 1663 } 1664 mtx_unlock(&softc->lock); 1665 1666 if (found == 0) { 1667 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1668 snprintf(ci->error_str, sizeof(ci->error_str), 1669 "No matching connections found"); 1670 return; 1671 } 1672 1673 ci->status = CTL_ISCSI_OK; 1674} 1675 1676static void 1677cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1678{ 1679 struct icl_pdu *response; 1680 struct iscsi_bhs_asynchronous_message *bhsam; 1681 struct ctl_iscsi_logout_params *cilp; 1682 struct cfiscsi_session *cs; 1683 struct cfiscsi_softc *softc; 1684 int found = 0; 1685 1686 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1687 softc = &cfiscsi_softc; 1688 1689 mtx_lock(&softc->lock); 1690 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1691 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1692 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1693 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1694 continue; 1695 1696 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1697 if (response == NULL) { 1698 ci->status = CTL_ISCSI_ERROR; 1699 snprintf(ci->error_str, sizeof(ci->error_str), 1700 "Unable to allocate memory"); 1701 mtx_unlock(&softc->lock); 1702 return; 1703 } 1704 bhsam = 1705 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1706 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1707 bhsam->bhsam_flags = 0x80; 1708 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1709 bhsam->bhsam_parameter3 = htons(10); 1710 cfiscsi_pdu_queue(response); 1711 found++; 1712 } 1713 mtx_unlock(&softc->lock); 1714 1715 if (found == 0) { 1716 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1717 snprintf(ci->error_str, sizeof(ci->error_str), 1718 "No matching connections found"); 1719 return; 1720 } 1721 1722 ci->status = CTL_ISCSI_OK; 1723} 1724 1725#ifdef ICL_KERNEL_PROXY 1726static void 1727cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1728{ 1729 struct ctl_iscsi_listen_params *cilp; 1730 struct sockaddr *sa; 1731 int error; 1732 1733 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1734 1735 if (cfiscsi_softc.listener == NULL) { 1736 CFISCSI_DEBUG("no listener"); 1737 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1738 ci->status = CTL_ISCSI_ERROR; 1739 return; 1740 } 1741 1742 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1743 if (error != 0) { 1744 CFISCSI_DEBUG("getsockaddr, error %d", error); 1745 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1746 ci->status = CTL_ISCSI_ERROR; 1747 return; 1748 } 1749 1750 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1751 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1752 if (error != 0) { 1753 free(sa, M_SONAME); 1754 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1755 snprintf(ci->error_str, sizeof(ci->error_str), 1756 "icl_listen_add failed, error %d", error); 1757 ci->status = CTL_ISCSI_ERROR; 1758 return; 1759 } 1760 1761 ci->status = CTL_ISCSI_OK; 1762} 1763 1764static void 1765cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1766{ 1767 struct ctl_iscsi_accept_params *ciap; 1768 struct cfiscsi_session *cs; 1769 int error; 1770 1771 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1772 1773 mtx_lock(&cfiscsi_softc.lock); 1774 for (;;) { 1775 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1776 if (cs->cs_waiting_for_ctld) 1777 break; 1778 } 1779 if (cs != NULL) 1780 break; 1781 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1782 if (error != 0) { 1783 mtx_unlock(&cfiscsi_softc.lock); 1784 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1785 ci->status = CTL_ISCSI_ERROR; 1786 return; 1787 } 1788 } 1789 mtx_unlock(&cfiscsi_softc.lock); 1790 1791 cs->cs_waiting_for_ctld = false; 1792 cs->cs_login_phase = true; 1793 1794 ciap->connection_id = cs->cs_id; 1795 ciap->portal_id = cs->cs_portal_id; 1796 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1797 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1798 cs->cs_initiator_sa->sa_len); 1799 if (error != 0) { 1800 snprintf(ci->error_str, sizeof(ci->error_str), 1801 "copyout failed with error %d", error); 1802 ci->status = CTL_ISCSI_ERROR; 1803 return; 1804 } 1805 1806 ci->status = CTL_ISCSI_OK; 1807} 1808 1809static void 1810cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1811{ 1812 struct ctl_iscsi_send_params *cisp; 1813 struct cfiscsi_session *cs; 1814 struct icl_pdu *ip; 1815 size_t datalen; 1816 void *data; 1817 int error; 1818 1819 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1820 1821 mtx_lock(&cfiscsi_softc.lock); 1822 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1823 if (cs->cs_id == cisp->connection_id) 1824 break; 1825 } 1826 if (cs == NULL) { 1827 mtx_unlock(&cfiscsi_softc.lock); 1828 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1829 ci->status = CTL_ISCSI_ERROR; 1830 return; 1831 } 1832 mtx_unlock(&cfiscsi_softc.lock); 1833 1834#if 0 1835 if (cs->cs_login_phase == false) 1836 return (EBUSY); 1837#endif 1838 1839 if (cs->cs_terminating) { 1840 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1841 ci->status = CTL_ISCSI_ERROR; 1842 return; 1843 } 1844 1845 datalen = cisp->data_segment_len; 1846 /* 1847 * XXX 1848 */ 1849 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1850 if (datalen > 65535) { 1851 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1852 ci->status = CTL_ISCSI_ERROR; 1853 return; 1854 } 1855 if (datalen > 0) { 1856 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1857 error = copyin(cisp->data_segment, data, datalen); 1858 if (error != 0) { 1859 free(data, M_CFISCSI); 1860 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1861 ci->status = CTL_ISCSI_ERROR; 1862 return; 1863 } 1864 } 1865 1866 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1867 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1868 if (datalen > 0) { 1869 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1870 free(data, M_CFISCSI); 1871 } 1872 CFISCSI_SESSION_LOCK(cs); 1873 icl_pdu_queue(ip); 1874 CFISCSI_SESSION_UNLOCK(cs); 1875 ci->status = CTL_ISCSI_OK; 1876} 1877 1878static void 1879cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1880{ 1881 struct ctl_iscsi_receive_params *cirp; 1882 struct cfiscsi_session *cs; 1883 struct icl_pdu *ip; 1884 void *data; 1885 int error; 1886 1887 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1888 1889 mtx_lock(&cfiscsi_softc.lock); 1890 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1891 if (cs->cs_id == cirp->connection_id) 1892 break; 1893 } 1894 if (cs == NULL) { 1895 mtx_unlock(&cfiscsi_softc.lock); 1896 snprintf(ci->error_str, sizeof(ci->error_str), 1897 "connection not found"); 1898 ci->status = CTL_ISCSI_ERROR; 1899 return; 1900 } 1901 mtx_unlock(&cfiscsi_softc.lock); 1902 1903#if 0 1904 if (is->is_login_phase == false) 1905 return (EBUSY); 1906#endif 1907 1908 CFISCSI_SESSION_LOCK(cs); 1909 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1910 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1911 if (error != 0) { 1912 CFISCSI_SESSION_UNLOCK(cs); 1913 snprintf(ci->error_str, sizeof(ci->error_str), 1914 "interrupted by signal"); 1915 ci->status = CTL_ISCSI_ERROR; 1916 return; 1917 } 1918 } 1919 1920 if (cs->cs_terminating) { 1921 CFISCSI_SESSION_UNLOCK(cs); 1922 snprintf(ci->error_str, sizeof(ci->error_str), 1923 "connection terminating"); 1924 ci->status = CTL_ISCSI_ERROR; 1925 return; 1926 } 1927 ip = cs->cs_login_pdu; 1928 cs->cs_login_pdu = NULL; 1929 CFISCSI_SESSION_UNLOCK(cs); 1930 1931 if (ip->ip_data_len > cirp->data_segment_len) { 1932 icl_pdu_free(ip); 1933 snprintf(ci->error_str, sizeof(ci->error_str), 1934 "data segment too big"); 1935 ci->status = CTL_ISCSI_ERROR; 1936 return; 1937 } 1938 1939 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1940 if (ip->ip_data_len > 0) { 1941 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1942 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1943 copyout(data, cirp->data_segment, ip->ip_data_len); 1944 free(data, M_CFISCSI); 1945 } 1946 1947 icl_pdu_free(ip); 1948 ci->status = CTL_ISCSI_OK; 1949} 1950 1951#endif /* !ICL_KERNEL_PROXY */ 1952 1953static void 1954cfiscsi_ioctl_port_create(struct ctl_req *req) 1955{ 1956 struct cfiscsi_target *ct; 1957 struct ctl_port *port; 1958 const char *target, *alias, *tag; 1959 struct scsi_vpd_id_descriptor *desc; 1960 ctl_options_t opts; 1961 int retval, len, idlen; 1962 1963 ctl_init_opts(&opts, req->num_args, req->kern_args); 1964 target = ctl_get_opt(&opts, "cfiscsi_target"); 1965 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1966 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1967 if (target == NULL || tag == NULL) { 1968 req->status = CTL_LUN_ERROR; 1969 snprintf(req->error_str, sizeof(req->error_str), 1970 "Missing required argument"); 1971 ctl_free_opts(&opts); 1972 return; 1973 } 1974 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1975 if (ct == NULL) { 1976 req->status = CTL_LUN_ERROR; 1977 snprintf(req->error_str, sizeof(req->error_str), 1978 "failed to create target \"%s\"", target); 1979 ctl_free_opts(&opts); 1980 return; 1981 } 1982 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1983 req->status = CTL_LUN_ERROR; 1984 snprintf(req->error_str, sizeof(req->error_str), 1985 "target \"%s\" already exists", target); 1986 cfiscsi_target_release(ct); 1987 ctl_free_opts(&opts); 1988 return; 1989 } 1990 port = &ct->ct_port; 1991 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 1992 goto done; 1993 1994 port->frontend = &cfiscsi_frontend; 1995 port->port_type = CTL_PORT_ISCSI; 1996 /* XXX KDM what should the real number be here? */ 1997 port->num_requested_ctl_io = 4096; 1998 port->port_name = "iscsi"; 1999 port->physical_port = strtoul(tag, NULL, 0); 2000 port->virtual_port = ct->ct_target_id; 2001 port->port_online = cfiscsi_online; 2002 port->port_offline = cfiscsi_offline; 2003 port->port_info = cfiscsi_info; 2004 port->onoff_arg = ct; 2005 port->lun_enable = cfiscsi_lun_enable; 2006 port->lun_disable = cfiscsi_lun_disable; 2007 port->lun_map = cfiscsi_lun_map; 2008 port->targ_lun_arg = ct; 2009 port->fe_datamove = cfiscsi_datamove; 2010 port->fe_done = cfiscsi_done; 2011 2012 /* XXX KDM what should we report here? */ 2013 /* XXX These should probably be fetched from CTL. */ 2014 port->max_targets = 1; 2015 port->max_target_id = 15; 2016 2017 port->options = opts; 2018 STAILQ_INIT(&opts); 2019 2020 /* Generate Port ID. */ 2021 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2022 idlen = roundup2(idlen, 4); 2023 len = sizeof(struct scsi_vpd_device_id) + idlen; 2024 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2025 M_CTL, M_WAITOK | M_ZERO); 2026 port->port_devid->len = len; 2027 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2028 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2029 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2030 SVPD_ID_TYPE_SCSI_NAME; 2031 desc->length = idlen; 2032 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2033 target, port->physical_port); 2034 2035 /* Generate Target ID. */ 2036 idlen = strlen(target) + 1; 2037 idlen = roundup2(idlen, 4); 2038 len = sizeof(struct scsi_vpd_device_id) + idlen; 2039 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2040 M_CTL, M_WAITOK | M_ZERO); 2041 port->target_devid->len = len; 2042 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2043 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2044 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2045 SVPD_ID_TYPE_SCSI_NAME; 2046 desc->length = idlen; 2047 strlcpy(desc->identifier, target, idlen); 2048 2049 retval = ctl_port_register(port, /*master_SC*/ 1); 2050 if (retval != 0) { 2051 ctl_free_opts(&port->options); 2052 cfiscsi_target_release(ct); 2053 free(port->port_devid, M_CFISCSI); 2054 free(port->target_devid, M_CFISCSI); 2055 req->status = CTL_LUN_ERROR; 2056 snprintf(req->error_str, sizeof(req->error_str), 2057 "ctl_frontend_register() failed with error %d", retval); 2058 return; 2059 } 2060done: 2061 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2062 req->status = CTL_LUN_OK; 2063 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2064 sizeof(port->targ_port)); //XXX 2065} 2066 2067static void 2068cfiscsi_ioctl_port_remove(struct ctl_req *req) 2069{ 2070 struct cfiscsi_target *ct; 2071 const char *target; 2072 ctl_options_t opts; 2073 2074 ctl_init_opts(&opts, req->num_args, req->kern_args); 2075 target = ctl_get_opt(&opts, "cfiscsi_target"); 2076 if (target == NULL) { 2077 ctl_free_opts(&opts); 2078 req->status = CTL_LUN_ERROR; 2079 snprintf(req->error_str, sizeof(req->error_str), 2080 "Missing required argument"); 2081 return; 2082 } 2083 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2084 if (ct == NULL) { 2085 ctl_free_opts(&opts); 2086 req->status = CTL_LUN_ERROR; 2087 snprintf(req->error_str, sizeof(req->error_str), 2088 "can't find target \"%s\"", target); 2089 return; 2090 } 2091 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2092 ctl_free_opts(&opts); 2093 req->status = CTL_LUN_ERROR; 2094 snprintf(req->error_str, sizeof(req->error_str), 2095 "target \"%s\" is already dying", target); 2096 return; 2097 } 2098 ctl_free_opts(&opts); 2099 2100 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2101 ctl_port_offline(&ct->ct_port); 2102 cfiscsi_target_release(ct); 2103 cfiscsi_target_release(ct); 2104} 2105 2106static int 2107cfiscsi_ioctl(struct cdev *dev, 2108 u_long cmd, caddr_t addr, int flag, struct thread *td) 2109{ 2110 struct ctl_iscsi *ci; 2111 struct ctl_req *req; 2112 2113 if (cmd == CTL_PORT_REQ) { 2114 req = (struct ctl_req *)addr; 2115 switch (req->reqtype) { 2116 case CTL_REQ_CREATE: 2117 cfiscsi_ioctl_port_create(req); 2118 break; 2119 case CTL_REQ_REMOVE: 2120 cfiscsi_ioctl_port_remove(req); 2121 break; 2122 default: 2123 req->status = CTL_LUN_ERROR; 2124 snprintf(req->error_str, sizeof(req->error_str), 2125 "Unsupported request type %d", req->reqtype); 2126 } 2127 return (0); 2128 } 2129 2130 if (cmd != CTL_ISCSI) 2131 return (ENOTTY); 2132 2133 ci = (struct ctl_iscsi *)addr; 2134 switch (ci->type) { 2135 case CTL_ISCSI_HANDOFF: 2136 cfiscsi_ioctl_handoff(ci); 2137 break; 2138 case CTL_ISCSI_LIST: 2139 cfiscsi_ioctl_list(ci); 2140 break; 2141 case CTL_ISCSI_TERMINATE: 2142 cfiscsi_ioctl_terminate(ci); 2143 break; 2144 case CTL_ISCSI_LOGOUT: 2145 cfiscsi_ioctl_logout(ci); 2146 break; 2147#ifdef ICL_KERNEL_PROXY 2148 case CTL_ISCSI_LISTEN: 2149 cfiscsi_ioctl_listen(ci); 2150 break; 2151 case CTL_ISCSI_ACCEPT: 2152 cfiscsi_ioctl_accept(ci); 2153 break; 2154 case CTL_ISCSI_SEND: 2155 cfiscsi_ioctl_send(ci); 2156 break; 2157 case CTL_ISCSI_RECEIVE: 2158 cfiscsi_ioctl_receive(ci); 2159 break; 2160#else 2161 case CTL_ISCSI_LISTEN: 2162 case CTL_ISCSI_ACCEPT: 2163 case CTL_ISCSI_SEND: 2164 case CTL_ISCSI_RECEIVE: 2165 ci->status = CTL_ISCSI_ERROR; 2166 snprintf(ci->error_str, sizeof(ci->error_str), 2167 "%s: CTL compiled without ICL_KERNEL_PROXY", 2168 __func__); 2169 break; 2170#endif /* !ICL_KERNEL_PROXY */ 2171 default: 2172 ci->status = CTL_ISCSI_ERROR; 2173 snprintf(ci->error_str, sizeof(ci->error_str), 2174 "%s: invalid iSCSI request type %d", __func__, ci->type); 2175 break; 2176 } 2177 2178 return (0); 2179} 2180 2181static void 2182cfiscsi_target_hold(struct cfiscsi_target *ct) 2183{ 2184 2185 refcount_acquire(&ct->ct_refcount); 2186} 2187 2188static void 2189cfiscsi_target_release(struct cfiscsi_target *ct) 2190{ 2191 struct cfiscsi_softc *softc; 2192 2193 softc = ct->ct_softc; 2194 mtx_lock(&softc->lock); 2195 if (refcount_release(&ct->ct_refcount)) { 2196 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2197 mtx_unlock(&softc->lock); 2198 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2199 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2200 if (ctl_port_deregister(&ct->ct_port) != 0) 2201 printf("%s: ctl_port_deregister() failed\n", 2202 __func__); 2203 } 2204 free(ct, M_CFISCSI); 2205 2206 return; 2207 } 2208 mtx_unlock(&softc->lock); 2209} 2210 2211static struct cfiscsi_target * 2212cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2213{ 2214 struct cfiscsi_target *ct; 2215 2216 mtx_lock(&softc->lock); 2217 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2218 if (strcmp(name, ct->ct_name) != 0 || 2219 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2220 continue; 2221 cfiscsi_target_hold(ct); 2222 mtx_unlock(&softc->lock); 2223 return (ct); 2224 } 2225 mtx_unlock(&softc->lock); 2226 2227 return (NULL); 2228} 2229 2230static struct cfiscsi_target * 2231cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2232 const char *alias) 2233{ 2234 struct cfiscsi_target *ct, *newct; 2235 int i; 2236 2237 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2238 return (NULL); 2239 2240 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2241 2242 mtx_lock(&softc->lock); 2243 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2244 if (strcmp(name, ct->ct_name) != 0 || 2245 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2246 continue; 2247 cfiscsi_target_hold(ct); 2248 mtx_unlock(&softc->lock); 2249 free(newct, M_CFISCSI); 2250 return (ct); 2251 } 2252 2253 for (i = 0; i < CTL_MAX_LUNS; i++) 2254 newct->ct_luns[i] = UINT32_MAX; 2255 2256 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2257 if (alias != NULL) 2258 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2259 refcount_init(&newct->ct_refcount, 1); 2260 newct->ct_softc = softc; 2261 if (TAILQ_EMPTY(&softc->targets)) 2262 softc->last_target_id = 0; 2263 newct->ct_target_id = ++softc->last_target_id; 2264 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2265 mtx_unlock(&softc->lock); 2266 2267 return (newct); 2268} 2269 2270/* 2271 * Takes LUN from the target space and returns LUN from the CTL space. 2272 */ 2273static uint32_t 2274cfiscsi_lun_map(void *arg, uint32_t lun) 2275{ 2276 struct cfiscsi_target *ct = arg; 2277 2278 if (lun >= CTL_MAX_LUNS) { 2279 CFISCSI_DEBUG("requested lun number %d is higher " 2280 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2281 return (UINT32_MAX); 2282 } 2283 return (ct->ct_luns[lun]); 2284} 2285 2286static int 2287cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2288 unsigned long lun_id, unsigned long ctl_lun_id) 2289{ 2290 2291 if (lun_id >= CTL_MAX_LUNS) { 2292 CFISCSI_WARN("requested lun number %ld is higher " 2293 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2294 return (-1); 2295 } 2296 2297 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2298 /* 2299 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2300 * when the LUN is created, and a second time just before 2301 * the port is brought online; don't emit warnings 2302 * for that case. 2303 */ 2304 if (ct->ct_luns[lun_id] == ctl_lun_id) 2305 return (0); 2306 CFISCSI_WARN("lun %ld already allocated", lun_id); 2307 return (-1); 2308 } 2309 2310#if 0 2311 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2312 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2313#endif 2314 2315 ct->ct_luns[lun_id] = ctl_lun_id; 2316 2317 return (0); 2318} 2319 2320static int 2321cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2322{ 2323 struct cfiscsi_softc *softc; 2324 struct cfiscsi_target *ct; 2325 const char *target = NULL; 2326 const char *lun = NULL; 2327 unsigned long tmp; 2328 2329 ct = (struct cfiscsi_target *)arg; 2330 softc = ct->ct_softc; 2331 2332 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2333 "cfiscsi_target"); 2334 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2335 "cfiscsi_lun"); 2336 2337 if (target == NULL && lun == NULL) 2338 return (0); 2339 2340 if (target == NULL || lun == NULL) { 2341 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2342 "cfiscsi_lun, or the other way around; ignoring"); 2343 return (0); 2344 } 2345 2346 if (strcmp(target, ct->ct_name) != 0) 2347 return (0); 2348 2349 tmp = strtoul(lun, NULL, 10); 2350 cfiscsi_target_set_lun(ct, tmp, lun_id); 2351 return (0); 2352} 2353 2354static int 2355cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2356{ 2357 struct cfiscsi_softc *softc; 2358 struct cfiscsi_target *ct; 2359 int i; 2360 2361 ct = (struct cfiscsi_target *)arg; 2362 softc = ct->ct_softc; 2363 2364 mtx_lock(&softc->lock); 2365 for (i = 0; i < CTL_MAX_LUNS; i++) { 2366 if (ct->ct_luns[i] != lun_id) 2367 continue; 2368 ct->ct_luns[i] = UINT32_MAX; 2369 break; 2370 } 2371 mtx_unlock(&softc->lock); 2372 return (0); 2373} 2374 2375static void 2376cfiscsi_datamove_in(union ctl_io *io) 2377{ 2378 struct cfiscsi_session *cs; 2379 struct icl_pdu *request, *response; 2380 const struct iscsi_bhs_scsi_command *bhssc; 2381 struct iscsi_bhs_data_in *bhsdi; 2382 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2383 size_t len, expected_len, sg_len, buffer_offset; 2384 const char *sg_addr; 2385 int ctl_sg_count, error, i; 2386 2387 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2388 cs = PDU_SESSION(request); 2389 2390 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2391 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2392 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2393 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2394 2395 if (io->scsiio.kern_sg_entries > 0) { 2396 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2397 ctl_sg_count = io->scsiio.kern_sg_entries; 2398 } else { 2399 ctl_sglist = &ctl_sg_entry; 2400 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2401 ctl_sglist->len = io->scsiio.kern_data_len; 2402 ctl_sg_count = 1; 2403 } 2404 2405 /* 2406 * This is the total amount of data to be transferred within the current 2407 * SCSI command. We need to record it so that we can properly report 2408 * underflow/underflow. 2409 */ 2410 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2411 2412 /* 2413 * This is the offset within the current SCSI command; for the first 2414 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2415 * it will be the sum of lengths of previous ones. 2416 */ 2417 buffer_offset = io->scsiio.kern_rel_offset; 2418 2419 /* 2420 * This is the transfer length expected by the initiator. In theory, 2421 * it could be different from the correct amount of data from the SCSI 2422 * point of view, even if that doesn't make any sense. 2423 */ 2424 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2425#if 0 2426 if (expected_len != io->scsiio.kern_total_len) { 2427 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2428 "actual length %zd", expected_len, 2429 (size_t)io->scsiio.kern_total_len); 2430 } 2431#endif 2432 2433 if (buffer_offset >= expected_len) { 2434#if 0 2435 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2436 "already sent the expected len", buffer_offset); 2437#endif 2438 io->scsiio.be_move_done(io); 2439 return; 2440 } 2441 2442 i = 0; 2443 sg_addr = NULL; 2444 sg_len = 0; 2445 response = NULL; 2446 bhsdi = NULL; 2447 for (;;) { 2448 if (response == NULL) { 2449 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2450 if (response == NULL) { 2451 CFISCSI_SESSION_WARN(cs, "failed to " 2452 "allocate memory; dropping connection"); 2453 ctl_set_busy(&io->scsiio); 2454 io->scsiio.be_move_done(io); 2455 cfiscsi_session_terminate(cs); 2456 return; 2457 } 2458 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2459 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2460 bhsdi->bhsdi_initiator_task_tag = 2461 bhssc->bhssc_initiator_task_tag; 2462 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2463 PDU_EXPDATASN(request)++; 2464 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2465 } 2466 2467 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2468 if (sg_len == 0) { 2469 sg_addr = ctl_sglist[i].addr; 2470 sg_len = ctl_sglist[i].len; 2471 KASSERT(sg_len > 0, ("sg_len <= 0")); 2472 } 2473 2474 len = sg_len; 2475 2476 /* 2477 * Truncate to maximum data segment length. 2478 */ 2479 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2480 ("ip_data_len %zd >= max_data_segment_length %zd", 2481 response->ip_data_len, cs->cs_max_data_segment_length)); 2482 if (response->ip_data_len + len > 2483 cs->cs_max_data_segment_length) { 2484 len = cs->cs_max_data_segment_length - 2485 response->ip_data_len; 2486 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2487 len, sg_len)); 2488 } 2489 2490 /* 2491 * Truncate to expected data transfer length. 2492 */ 2493 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2494 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2495 buffer_offset, response->ip_data_len, expected_len)); 2496 if (buffer_offset + response->ip_data_len + len > expected_len) { 2497 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2498 "to expected data transfer length %zd", 2499 buffer_offset + response->ip_data_len + len, expected_len); 2500 len = expected_len - (buffer_offset + response->ip_data_len); 2501 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2502 len, sg_len)); 2503 } 2504 2505 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2506 if (error != 0) { 2507 CFISCSI_SESSION_WARN(cs, "failed to " 2508 "allocate memory; dropping connection"); 2509 icl_pdu_free(response); 2510 ctl_set_busy(&io->scsiio); 2511 io->scsiio.be_move_done(io); 2512 cfiscsi_session_terminate(cs); 2513 return; 2514 } 2515 sg_addr += len; 2516 sg_len -= len; 2517 2518 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2519 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2520 buffer_offset, response->ip_data_len, expected_len)); 2521 if (buffer_offset + response->ip_data_len == expected_len) { 2522 /* 2523 * Already have the amount of data the initiator wanted. 2524 */ 2525 break; 2526 } 2527 2528 if (sg_len == 0) { 2529 /* 2530 * End of scatter-gather segment; 2531 * proceed to the next one... 2532 */ 2533 if (i == ctl_sg_count - 1) { 2534 /* 2535 * ... unless this was the last one. 2536 */ 2537 break; 2538 } 2539 i++; 2540 } 2541 2542 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2543 /* 2544 * Can't stuff more data into the current PDU; 2545 * queue it. Note that's not enough to check 2546 * for kern_data_resid == 0 instead; there 2547 * may be several Data-In PDUs for the final 2548 * call to cfiscsi_datamove(), and we want 2549 * to set the F flag only on the last of them. 2550 */ 2551 buffer_offset += response->ip_data_len; 2552 if (buffer_offset == io->scsiio.kern_total_len || 2553 buffer_offset == expected_len) 2554 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2555 cfiscsi_pdu_queue(response); 2556 response = NULL; 2557 bhsdi = NULL; 2558 } 2559 } 2560 if (response != NULL) { 2561 buffer_offset += response->ip_data_len; 2562 if (buffer_offset == io->scsiio.kern_total_len || 2563 buffer_offset == expected_len) 2564 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2565 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2566 cfiscsi_pdu_queue(response); 2567 } 2568 2569 io->scsiio.be_move_done(io); 2570} 2571 2572static void 2573cfiscsi_datamove_out(union ctl_io *io) 2574{ 2575 struct cfiscsi_session *cs; 2576 struct icl_pdu *request, *response; 2577 const struct iscsi_bhs_scsi_command *bhssc; 2578 struct iscsi_bhs_r2t *bhsr2t; 2579 struct cfiscsi_data_wait *cdw; 2580 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2581 uint32_t expected_len, r2t_off, r2t_len; 2582 uint32_t target_transfer_tag; 2583 bool done; 2584 2585 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2586 cs = PDU_SESSION(request); 2587 2588 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2589 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2590 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2591 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2592 2593 /* 2594 * We need to record it so that we can properly report 2595 * underflow/underflow. 2596 */ 2597 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2598 2599 /* 2600 * Report write underflow as error since CTL and backends don't 2601 * really support it, and SCSI does not tell how to do it right. 2602 */ 2603 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2604 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2605 expected_len) { 2606 io->scsiio.io_hdr.port_status = 43; 2607 io->scsiio.be_move_done(io); 2608 return; 2609 } 2610 2611 target_transfer_tag = 2612 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2613 2614#if 0 2615 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2616 "task tag 0x%x, target transfer tag 0x%x", 2617 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2618#endif 2619 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2620 if (cdw == NULL) { 2621 CFISCSI_SESSION_WARN(cs, "failed to " 2622 "allocate memory; dropping connection"); 2623 ctl_set_busy(&io->scsiio); 2624 io->scsiio.be_move_done(io); 2625 cfiscsi_session_terminate(cs); 2626 return; 2627 } 2628 cdw->cdw_ctl_io = io; 2629 cdw->cdw_target_transfer_tag = target_transfer_tag; 2630 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2631 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2632 2633 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2634 if (io->scsiio.kern_sg_entries > 0) { 2635 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2636 } else { 2637 ctl_sglist = &ctl_sg_entry; 2638 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2639 ctl_sglist->len = io->scsiio.kern_data_len; 2640 } 2641 cdw->cdw_sg_index = 0; 2642 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2643 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2644 r2t_off = io->scsiio.ext_data_filled; 2645 while (r2t_off > 0) { 2646 if (r2t_off >= cdw->cdw_sg_len) { 2647 r2t_off -= cdw->cdw_sg_len; 2648 cdw->cdw_sg_index++; 2649 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2650 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2651 continue; 2652 } 2653 cdw->cdw_sg_addr += r2t_off; 2654 cdw->cdw_sg_len -= r2t_off; 2655 r2t_off = 0; 2656 } 2657 2658 if (cs->cs_immediate_data && 2659 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2660 icl_pdu_data_segment_length(request)) { 2661 done = cfiscsi_handle_data_segment(request, cdw); 2662 if (done) { 2663 uma_zfree(cfiscsi_data_wait_zone, cdw); 2664 io->scsiio.be_move_done(io); 2665 return; 2666 } 2667 } 2668 2669 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2670 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2671 cs->cs_max_burst_length); 2672 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2673 2674 CFISCSI_SESSION_LOCK(cs); 2675 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2676 CFISCSI_SESSION_UNLOCK(cs); 2677 2678 /* 2679 * XXX: We should limit the number of outstanding R2T PDUs 2680 * per task to MaxOutstandingR2T. 2681 */ 2682 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2683 if (response == NULL) { 2684 CFISCSI_SESSION_WARN(cs, "failed to " 2685 "allocate memory; dropping connection"); 2686 ctl_set_busy(&io->scsiio); 2687 io->scsiio.be_move_done(io); 2688 cfiscsi_session_terminate(cs); 2689 return; 2690 } 2691 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2692 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2693 bhsr2t->bhsr2t_flags = 0x80; 2694 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2695 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2696 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2697 /* 2698 * XXX: Here we assume that cfiscsi_datamove() won't ever 2699 * be running concurrently on several CPUs for a given 2700 * command. 2701 */ 2702 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2703 PDU_R2TSN(request)++; 2704 /* 2705 * This is the offset within the current SCSI command; 2706 * i.e. for the first call of datamove(), it will be 0, 2707 * and for subsequent ones it will be the sum of lengths 2708 * of previous ones. 2709 * 2710 * The ext_data_filled is to account for unsolicited 2711 * (immediate) data that might have already arrived. 2712 */ 2713 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2714 /* 2715 * This is the total length (sum of S/G lengths) this call 2716 * to cfiscsi_datamove() is supposed to handle, limited by 2717 * MaxBurstLength. 2718 */ 2719 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2720 cfiscsi_pdu_queue(response); 2721} 2722 2723static void 2724cfiscsi_datamove(union ctl_io *io) 2725{ 2726 2727 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2728 cfiscsi_datamove_in(io); 2729 else { 2730 /* We hadn't received anything during this datamove yet. */ 2731 io->scsiio.ext_data_filled = 0; 2732 cfiscsi_datamove_out(io); 2733 } 2734} 2735 2736static void 2737cfiscsi_scsi_command_done(union ctl_io *io) 2738{ 2739 struct icl_pdu *request, *response; 2740 struct iscsi_bhs_scsi_command *bhssc; 2741 struct iscsi_bhs_scsi_response *bhssr; 2742#ifdef DIAGNOSTIC 2743 struct cfiscsi_data_wait *cdw; 2744#endif 2745 struct cfiscsi_session *cs; 2746 uint16_t sense_length; 2747 2748 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2749 cs = PDU_SESSION(request); 2750 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2751 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2752 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2753 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2754 2755 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2756 // bhssc->bhssc_initiator_task_tag); 2757 2758#ifdef DIAGNOSTIC 2759 CFISCSI_SESSION_LOCK(cs); 2760 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2761 KASSERT(bhssc->bhssc_initiator_task_tag != 2762 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2763 CFISCSI_SESSION_UNLOCK(cs); 2764#endif 2765 2766 /* 2767 * Do not return status for aborted commands. 2768 * There are exceptions, but none supported by CTL yet. 2769 */ 2770 if ((io->io_hdr.flags & CTL_FLAG_ABORT) && 2771 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) { 2772 ctl_free_io(io); 2773 icl_pdu_free(request); 2774 return; 2775 } 2776 2777 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2778 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2779 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2780 bhssr->bhssr_flags = 0x80; 2781 /* 2782 * XXX: We don't deal with bidirectional under/overflows; 2783 * does anything actually support those? 2784 */ 2785 if (PDU_TOTAL_TRANSFER_LEN(request) < 2786 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2787 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2788 bhssr->bhssr_residual_count = 2789 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2790 PDU_TOTAL_TRANSFER_LEN(request)); 2791 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2792 // ntohl(bhssr->bhssr_residual_count)); 2793 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2794 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2795 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2796 bhssr->bhssr_residual_count = 2797 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2798 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2799 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2800 // ntohl(bhssr->bhssr_residual_count)); 2801 } 2802 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2803 bhssr->bhssr_status = io->scsiio.scsi_status; 2804 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2805 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2806 2807 if (io->scsiio.sense_len > 0) { 2808#if 0 2809 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2810 io->scsiio.sense_len); 2811#endif 2812 sense_length = htons(io->scsiio.sense_len); 2813 icl_pdu_append_data(response, 2814 &sense_length, sizeof(sense_length), M_WAITOK); 2815 icl_pdu_append_data(response, 2816 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2817 } 2818 2819 ctl_free_io(io); 2820 icl_pdu_free(request); 2821 cfiscsi_pdu_queue(response); 2822} 2823 2824static void 2825cfiscsi_task_management_done(union ctl_io *io) 2826{ 2827 struct icl_pdu *request, *response; 2828 struct iscsi_bhs_task_management_request *bhstmr; 2829 struct iscsi_bhs_task_management_response *bhstmr2; 2830 struct cfiscsi_data_wait *cdw, *tmpcdw; 2831 struct cfiscsi_session *cs; 2832 2833 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2834 cs = PDU_SESSION(request); 2835 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2836 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2837 ISCSI_BHS_OPCODE_TASK_REQUEST, 2838 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2839 2840#if 0 2841 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2842 bhstmr->bhstmr_initiator_task_tag, 2843 bhstmr->bhstmr_referenced_task_tag); 2844#endif 2845 2846 if ((bhstmr->bhstmr_function & ~0x80) == 2847 BHSTMR_FUNCTION_ABORT_TASK) { 2848 /* 2849 * Make sure we no longer wait for Data-Out for this command. 2850 */ 2851 CFISCSI_SESSION_LOCK(cs); 2852 TAILQ_FOREACH_SAFE(cdw, 2853 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2854 if (bhstmr->bhstmr_referenced_task_tag != 2855 cdw->cdw_initiator_task_tag) 2856 continue; 2857 2858#if 0 2859 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2860 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2861#endif 2862 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2863 cdw, cdw_next); 2864 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2865 uma_zfree(cfiscsi_data_wait_zone, cdw); 2866 } 2867 CFISCSI_SESSION_UNLOCK(cs); 2868 } 2869 2870 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2871 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2872 response->ip_bhs; 2873 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2874 bhstmr2->bhstmr_flags = 0x80; 2875 if (io->io_hdr.status == CTL_SUCCESS) { 2876 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2877 } else { 2878 /* 2879 * XXX: How to figure out what exactly went wrong? iSCSI spec 2880 * expects us to provide detailed error, e.g. "Task does 2881 * not exist" or "LUN does not exist". 2882 */ 2883 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2884 bhstmr2->bhstmr_response = 2885 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2886 } 2887 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2888 2889 ctl_free_io(io); 2890 icl_pdu_free(request); 2891 cfiscsi_pdu_queue(response); 2892} 2893 2894static void 2895cfiscsi_done(union ctl_io *io) 2896{ 2897 struct icl_pdu *request; 2898 struct cfiscsi_session *cs; 2899 2900 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2901 ("invalid CTL status %#x", io->io_hdr.status)); 2902 2903 if (io->io_hdr.io_type == CTL_IO_TASK && 2904 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2905 /* 2906 * Implicit task termination has just completed; nothing to do. 2907 */ 2908 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2909 cs->cs_tasks_aborted = true; 2910 refcount_release(&cs->cs_outstanding_ctl_pdus); 2911 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2912 ctl_free_io(io); 2913 return; 2914 } 2915 2916 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2917 cs = PDU_SESSION(request); 2918 refcount_release(&cs->cs_outstanding_ctl_pdus); 2919 2920 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2921 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2922 cfiscsi_scsi_command_done(io); 2923 break; 2924 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2925 cfiscsi_task_management_done(io); 2926 break; 2927 default: 2928 panic("cfiscsi_done called with wrong opcode 0x%x", 2929 request->ip_bhs->bhs_opcode); 2930 } 2931} 2932