ctl_frontend_iscsi.c revision 263740
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 263740 2014-03-25 18:30:57Z 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 263740 2014-03-25 18:30:57Z 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 "ctl_frontend_iscsi.h" 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 79static uma_zone_t cfiscsi_data_wait_zone; 80 81SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 82 "CAM Target Layer iSCSI Frontend"); 83static int debug = 3; 84TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 85SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RW, 86 &debug, 1, "Enable debug messages"); 87static int ping_timeout = 5; 88TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RW, 90 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 91static int login_timeout = 60; 92TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RW, 94 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 95static int maxcmdsn_delta = 256; 96TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RW, 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_targ_enable(void *arg, struct ctl_id targ_id); 149static int cfiscsi_targ_disable(void *arg, struct ctl_id targ_id); 150static int cfiscsi_lun_enable(void *arg, 151 struct ctl_id target_id, int lun_id); 152static int cfiscsi_lun_disable(void *arg, 153 struct ctl_id target_id, int lun_id); 154static int cfiscsi_ioctl(struct cdev *dev, 155 u_long cmd, caddr_t addr, int flag, struct thread *td); 156static int cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len); 157static void cfiscsi_datamove(union ctl_io *io); 158static void cfiscsi_done(union ctl_io *io); 159static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun); 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 void cfiscsi_target_release(struct cfiscsi_target *ct); 170static void cfiscsi_session_delete(struct cfiscsi_session *cs); 171 172static struct cfiscsi_softc cfiscsi_softc; 173extern struct ctl_softc *control_softc; 174 175static int cfiscsi_module_event_handler(module_t, int /*modeventtype_t*/, void *); 176 177static moduledata_t cfiscsi_moduledata = { 178 "ctlcfiscsi", 179 cfiscsi_module_event_handler, 180 NULL 181}; 182 183DECLARE_MODULE(ctlcfiscsi, cfiscsi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH); 184MODULE_VERSION(ctlcfiscsi, 1); 185MODULE_DEPEND(ctlcfiscsi, ctl, 1, 1, 1); 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_bhs(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 /* 239 * The target MUST silently ignore any non-immediate command outside 240 * of this range. 241 */ 242 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 243 CFISCSI_SESSION_UNLOCK(cs); 244 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 245 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 246 return (true); 247 } 248 249 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 250 cs->cs_cmdsn++; 251 252 CFISCSI_SESSION_UNLOCK(cs); 253 254 return (false); 255} 256 257static void 258cfiscsi_pdu_handle(struct icl_pdu *request) 259{ 260 struct cfiscsi_session *cs; 261 bool ignore; 262 263 cs = PDU_SESSION(request); 264 265 ignore = cfiscsi_pdu_update_cmdsn(request); 266 if (ignore) { 267 icl_pdu_free(request); 268 return; 269 } 270 271 /* 272 * Handle the PDU; this includes e.g. receiving the remaining 273 * part of PDU and submitting the SCSI command to CTL 274 * or queueing a reply. The handling routine is responsible 275 * for freeing the PDU when it's no longer needed. 276 */ 277 switch (request->ip_bhs->bhs_opcode & 278 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 279 case ISCSI_BHS_OPCODE_NOP_OUT: 280 cfiscsi_pdu_handle_nop_out(request); 281 break; 282 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 283 cfiscsi_pdu_handle_scsi_command(request); 284 break; 285 case ISCSI_BHS_OPCODE_TASK_REQUEST: 286 cfiscsi_pdu_handle_task_request(request); 287 break; 288 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 289 cfiscsi_pdu_handle_data_out(request); 290 break; 291 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 292 cfiscsi_pdu_handle_logout_request(request); 293 break; 294 default: 295 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 296 "opcode 0x%x; dropping connection", 297 request->ip_bhs->bhs_opcode); 298 icl_pdu_free(request); 299 cfiscsi_session_terminate(cs); 300 } 301 302} 303 304static void 305cfiscsi_receive_callback(struct icl_pdu *request) 306{ 307 struct cfiscsi_session *cs; 308 309 cs = PDU_SESSION(request); 310 311#ifdef ICL_KERNEL_PROXY 312 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 313 if (cs->cs_login_pdu == NULL) 314 cs->cs_login_pdu = request; 315 else 316 icl_pdu_free(request); 317 cv_signal(&cs->cs_login_cv); 318 return; 319 } 320#endif 321 322 cfiscsi_pdu_handle(request); 323} 324 325static void 326cfiscsi_error_callback(struct icl_conn *ic) 327{ 328 struct cfiscsi_session *cs; 329 330 cs = CONN_SESSION(ic); 331 332 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 333 cfiscsi_session_terminate(cs); 334} 335 336static int 337cfiscsi_pdu_prepare(struct icl_pdu *response) 338{ 339 struct cfiscsi_session *cs; 340 struct iscsi_bhs_scsi_response *bhssr; 341 bool advance_statsn = true; 342 343 cs = PDU_SESSION(response); 344 345 CFISCSI_SESSION_LOCK_ASSERT(cs); 346 347 /* 348 * We're only using fields common for all the response 349 * (target -> initiator) PDUs. 350 */ 351 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 352 353 /* 354 * 10.8.3: "The StatSN for this connection is not advanced 355 * after this PDU is sent." 356 */ 357 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 358 advance_statsn = false; 359 360 /* 361 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 362 * StatSN for the connection is not advanced after this PDU is sent." 363 */ 364 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 365 bhssr->bhssr_initiator_task_tag == 0xffffffff) 366 advance_statsn = false; 367 368 /* 369 * See the comment below - StatSN is not meaningful and must 370 * not be advanced. 371 */ 372 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 373 advance_statsn = false; 374 375 /* 376 * 10.7.3: "The fields StatSN, Status, and Residual Count 377 * only have meaningful content if the S bit is set to 1." 378 */ 379 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 380 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 381 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 382 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 383 384 if (advance_statsn) 385 cs->cs_statsn++; 386 387 return (0); 388} 389 390static void 391cfiscsi_pdu_queue(struct icl_pdu *response) 392{ 393 struct cfiscsi_session *cs; 394 395 cs = PDU_SESSION(response); 396 397 CFISCSI_SESSION_LOCK(cs); 398 cfiscsi_pdu_prepare(response); 399 icl_pdu_queue(response); 400 CFISCSI_SESSION_UNLOCK(cs); 401} 402 403static uint32_t 404cfiscsi_decode_lun(uint64_t encoded) 405{ 406 uint8_t lun[8]; 407 uint32_t result; 408 409 /* 410 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 411 * but is in fact an evil, multidimensional structure defined 412 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 413 */ 414 memcpy(lun, &encoded, sizeof(lun)); 415 switch (lun[0] & 0xC0) { 416 case 0x00: 417 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 418 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 419 CFISCSI_WARN("malformed LUN " 420 "(peripheral device addressing method): 0x%jx", 421 (uintmax_t)encoded); 422 result = 0xffffffff; 423 break; 424 } 425 result = lun[1]; 426 break; 427 case 0x40: 428 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 429 lun[6] != 0 || lun[7] != 0) { 430 CFISCSI_WARN("malformed LUN " 431 "(flat address space addressing method): 0x%jx", 432 (uintmax_t)encoded); 433 result = 0xffffffff; 434 break; 435 } 436 result = ((lun[0] & 0x3f) << 8) + lun[1]; 437 break; 438 case 0xC0: 439 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 440 lun[6] != 0 || lun[7] != 0) { 441 CFISCSI_WARN("malformed LUN (extended flat " 442 "address space addressing method): 0x%jx", 443 (uintmax_t)encoded); 444 result = 0xffffffff; 445 break; 446 } 447 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 448 default: 449 CFISCSI_WARN("unsupported LUN format 0x%jx", 450 (uintmax_t)encoded); 451 result = 0xffffffff; 452 break; 453 } 454 455 return (result); 456} 457 458static void 459cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 460{ 461 struct cfiscsi_session *cs; 462 struct iscsi_bhs_nop_out *bhsno; 463 struct iscsi_bhs_nop_in *bhsni; 464 struct icl_pdu *response; 465 void *data = NULL; 466 size_t datasize; 467 int error; 468 469 cs = PDU_SESSION(request); 470 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 471 472 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 473 /* 474 * Nothing to do, iscsi_pdu_update_statsn() already 475 * zeroed the timeout. 476 */ 477 icl_pdu_free(request); 478 return; 479 } 480 481 datasize = icl_pdu_data_segment_length(request); 482 if (datasize > 0) { 483 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 484 if (data == NULL) { 485 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 486 "dropping connection"); 487 icl_pdu_free(request); 488 cfiscsi_session_terminate(cs); 489 return; 490 } 491 icl_pdu_get_data(request, 0, data, datasize); 492 } 493 494 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 495 if (response == NULL) { 496 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 497 "droppping connection"); 498 free(data, M_CFISCSI); 499 icl_pdu_free(request); 500 cfiscsi_session_terminate(cs); 501 return; 502 } 503 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 504 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 505 bhsni->bhsni_flags = 0x80; 506 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 507 bhsni->bhsni_target_transfer_tag = 0xffffffff; 508 if (datasize > 0) { 509 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 510 if (error != 0) { 511 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 512 "dropping connection"); 513 free(data, M_CFISCSI); 514 icl_pdu_free(request); 515 icl_pdu_free(response); 516 cfiscsi_session_terminate(cs); 517 return; 518 } 519 free(data, M_CFISCSI); 520 } 521 522 icl_pdu_free(request); 523 cfiscsi_pdu_queue(response); 524} 525 526static void 527cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 528{ 529 struct iscsi_bhs_scsi_command *bhssc; 530 struct cfiscsi_session *cs; 531 union ctl_io *io; 532 int error; 533 534 cs = PDU_SESSION(request); 535 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 536 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 537 // bhssc->bhssc_initiator_task_tag); 538 539 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 540 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 541 "ImmediateData=No; dropping connection"); 542 icl_pdu_free(request); 543 cfiscsi_session_terminate(cs); 544 return; 545 } 546 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 547 if (io == NULL) { 548 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 549 "dropping connection"); 550 icl_pdu_free(request); 551 cfiscsi_session_terminate(cs); 552 return; 553 } 554 ctl_zero_io(io); 555 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 556 io->io_hdr.io_type = CTL_IO_SCSI; 557 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 558 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 559 io->io_hdr.nexus.targ_target.id = 0; 560 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 561 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 562 io->io_hdr.nexus.lun_map_arg = cs; 563 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 564 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 565 case BHSSC_FLAGS_ATTR_UNTAGGED: 566 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 567 break; 568 case BHSSC_FLAGS_ATTR_SIMPLE: 569 io->scsiio.tag_type = CTL_TAG_SIMPLE; 570 break; 571 case BHSSC_FLAGS_ATTR_ORDERED: 572 io->scsiio.tag_type = CTL_TAG_ORDERED; 573 break; 574 case BHSSC_FLAGS_ATTR_HOQ: 575 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 576 break; 577 case BHSSC_FLAGS_ATTR_ACA: 578 io->scsiio.tag_type = CTL_TAG_ACA; 579 break; 580 default: 581 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 582 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 583 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 584 break; 585 } 586 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 587 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 588 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 589 error = ctl_queue(io); 590 if (error != CTL_RETVAL_COMPLETE) { 591 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 592 "dropping connection", error); 593 ctl_free_io(io); 594 refcount_release(&cs->cs_outstanding_ctl_pdus); 595 icl_pdu_free(request); 596 cfiscsi_session_terminate(cs); 597 } 598} 599 600static void 601cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 602{ 603 struct iscsi_bhs_task_management_request *bhstmr; 604 struct iscsi_bhs_task_management_response *bhstmr2; 605 struct icl_pdu *response; 606 struct cfiscsi_session *cs; 607 union ctl_io *io; 608 int error; 609 610 cs = PDU_SESSION(request); 611 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 612 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 613 if (io == NULL) { 614 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 615 "dropping connection"); 616 icl_pdu_free(request); 617 cfiscsi_session_terminate(cs); 618 return; 619 } 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.id = cs->cs_ctl_initid; 624 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 625 io->io_hdr.nexus.targ_target.id = 0; 626 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 627 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 628 io->io_hdr.nexus.lun_map_arg = cs; 629 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 630 631 switch (bhstmr->bhstmr_function & ~0x80) { 632 case BHSTMR_FUNCTION_ABORT_TASK: 633#if 0 634 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 635#endif 636 io->taskio.task_action = CTL_TASK_ABORT_TASK; 637 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 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; 736 737 /* 738 * Make sure the offset, as sent by the initiator, matches the offset 739 * we're supposed to be at in the scatter-gather list. 740 */ 741 if (buffer_offset != io->scsiio.ext_data_filled) { 742 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 743 "expected %zd", buffer_offset, 744 (size_t)io->scsiio.ext_data_filled); 745 cfiscsi_session_terminate(cs); 746 return (true); 747 } 748 749 /* 750 * This is the offset within the PDU data segment, as opposed 751 * to buffer_offset, which is the offset within the task (SCSI 752 * command). 753 */ 754 off = 0; 755 len = icl_pdu_data_segment_length(request); 756 757 /* 758 * Iterate over the scatter/gather segments, filling them with data 759 * from the PDU data segment. Note that this can get called multiple 760 * times for one SCSI command; the cdw structure holds state for the 761 * scatter/gather list. 762 */ 763 for (;;) { 764 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 765 ("cdw->cdw_sg_index >= ctl_sg_count")); 766 if (cdw->cdw_sg_len == 0) { 767 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 768 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 769 } 770 KASSERT(off <= len, ("len > off")); 771 copy_len = len - off; 772 if (copy_len > cdw->cdw_sg_len) 773 copy_len = cdw->cdw_sg_len; 774 775 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 776 cdw->cdw_sg_addr += copy_len; 777 cdw->cdw_sg_len -= copy_len; 778 off += copy_len; 779 io->scsiio.ext_data_filled += copy_len; 780 781 if (cdw->cdw_sg_len == 0) { 782 /* 783 * End of current segment. 784 */ 785 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 786 /* 787 * Last segment in scatter/gather list. 788 */ 789 break; 790 } 791 cdw->cdw_sg_index++; 792 } 793 794 if (off == len) { 795 /* 796 * End of PDU payload. 797 */ 798 break; 799 } 800 } 801 802 if (len > off) { 803 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 804 "expected %zd", icl_pdu_data_segment_length(request), off); 805 cfiscsi_session_terminate(cs); 806 return (true); 807 } 808 809 if (bhsdo->bhsdo_flags & BHSDO_FLAGS_F || 810 io->scsiio.ext_data_filled == io->scsiio.kern_total_len) { 811 if ((bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 812 CFISCSI_SESSION_WARN(cs, "got the final packet without " 813 "the F flag; flags = 0x%x; dropping connection", 814 bhsdo->bhsdo_flags); 815 cfiscsi_session_terminate(cs); 816 return (true); 817 } 818 819 if (io->scsiio.ext_data_filled != io->scsiio.kern_total_len) { 820 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 821 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 822 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 823 "transmitted size was %zd bytes instead of %d; " 824 "dropping connection", 825 (size_t)io->scsiio.ext_data_filled, 826 io->scsiio.kern_total_len); 827 cfiscsi_session_terminate(cs); 828 return (true); 829 } else { 830 /* 831 * For SCSI Command PDU, this just means we need to 832 * solicit more data by sending R2T. 833 */ 834 return (false); 835 } 836 } 837#if 0 838 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 839 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 840#endif 841 842 return (true); 843 } 844 845 return (false); 846} 847 848static void 849cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 850{ 851 struct iscsi_bhs_data_out *bhsdo; 852 struct cfiscsi_session *cs; 853 struct cfiscsi_data_wait *cdw = NULL; 854 union ctl_io *io; 855 bool done; 856 857 cs = PDU_SESSION(request); 858 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 859 860 CFISCSI_SESSION_LOCK(cs); 861 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 862#if 0 863 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 864 "ttt 0x%x, itt 0x%x", 865 bhsdo->bhsdo_target_transfer_tag, 866 bhsdo->bhsdo_initiator_task_tag, 867 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 868#endif 869 if (bhsdo->bhsdo_target_transfer_tag == 870 cdw->cdw_target_transfer_tag) 871 break; 872 } 873 CFISCSI_SESSION_UNLOCK(cs); 874 if (cdw == NULL) { 875 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 876 "0x%x, not found; dropping connection", 877 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 878 icl_pdu_free(request); 879 cfiscsi_session_terminate(cs); 880 return; 881 } 882 883 io = cdw->cdw_ctl_io; 884 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 885 ("CTL_FLAG_DATA_IN")); 886 887 done = cfiscsi_handle_data_segment(request, cdw); 888 if (done) { 889 CFISCSI_SESSION_LOCK(cs); 890 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 891 CFISCSI_SESSION_UNLOCK(cs); 892 uma_zfree(cfiscsi_data_wait_zone, cdw); 893 io->scsiio.be_move_done(io); 894 } 895 896 icl_pdu_free(request); 897} 898 899static void 900cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 901{ 902 struct iscsi_bhs_logout_request *bhslr; 903 struct iscsi_bhs_logout_response *bhslr2; 904 struct icl_pdu *response; 905 struct cfiscsi_session *cs; 906 907 cs = PDU_SESSION(request); 908 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 909 switch (bhslr->bhslr_reason & 0x7f) { 910 case BHSLR_REASON_CLOSE_SESSION: 911 case BHSLR_REASON_CLOSE_CONNECTION: 912 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 913 if (response == NULL) { 914 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 915 icl_pdu_free(request); 916 cfiscsi_session_terminate(cs); 917 return; 918 } 919 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 920 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 921 bhslr2->bhslr_flags = 0x80; 922 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 923 bhslr2->bhslr_initiator_task_tag = 924 bhslr->bhslr_initiator_task_tag; 925 icl_pdu_free(request); 926 cfiscsi_pdu_queue(response); 927 cfiscsi_session_terminate(cs); 928 break; 929 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 930 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 931 if (response == NULL) { 932 CFISCSI_SESSION_WARN(cs, 933 "failed to allocate memory; dropping connection"); 934 icl_pdu_free(request); 935 cfiscsi_session_terminate(cs); 936 return; 937 } 938 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 939 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 940 bhslr2->bhslr_flags = 0x80; 941 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 942 bhslr2->bhslr_initiator_task_tag = 943 bhslr->bhslr_initiator_task_tag; 944 icl_pdu_free(request); 945 cfiscsi_pdu_queue(response); 946 break; 947 default: 948 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 949 bhslr->bhslr_reason); 950 icl_pdu_free(request); 951 cfiscsi_session_terminate(cs); 952 break; 953 } 954} 955 956static void 957cfiscsi_callout(void *context) 958{ 959 struct icl_pdu *cp; 960 struct iscsi_bhs_nop_in *bhsni; 961 struct cfiscsi_session *cs; 962 963 cs = context; 964 965 if (cs->cs_terminating) 966 return; 967 968 callout_schedule(&cs->cs_callout, 1 * hz); 969 970 CFISCSI_SESSION_LOCK(cs); 971 cs->cs_timeout++; 972 CFISCSI_SESSION_UNLOCK(cs); 973 974#ifdef ICL_KERNEL_PROXY 975 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 976 if (cs->cs_timeout > login_timeout) { 977 CFISCSI_SESSION_WARN(cs, "login timed out after " 978 "%d seconds; dropping connection", cs->cs_timeout); 979 cfiscsi_session_terminate(cs); 980 } 981 return; 982 } 983#endif 984 985 if (cs->cs_timeout >= ping_timeout) { 986 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 987 "dropping connection", ping_timeout); 988 cfiscsi_session_terminate(cs); 989 return; 990 } 991 992 /* 993 * If the ping was reset less than one second ago - which means 994 * that we've received some PDU during the last second - assume 995 * the traffic flows correctly and don't bother sending a NOP-Out. 996 * 997 * (It's 2 - one for one second, and one for incrementing is_timeout 998 * earlier in this routine.) 999 */ 1000 if (cs->cs_timeout < 2) 1001 return; 1002 1003 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1004 if (cp == NULL) { 1005 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1006 return; 1007 } 1008 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1009 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1010 bhsni->bhsni_flags = 0x80; 1011 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1012 1013 cfiscsi_pdu_queue(cp); 1014} 1015 1016static void 1017cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1018{ 1019 struct cfiscsi_data_wait *cdw, *tmpcdw; 1020 union ctl_io *io; 1021 int error; 1022 1023#ifdef notyet 1024 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1025 if (io == NULL) { 1026 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1027 return; 1028 } 1029 ctl_zero_io(io); 1030 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1031 io->io_hdr.io_type = CTL_IO_TASK; 1032 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1033 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1034 io->io_hdr.nexus.targ_target.id = 0; 1035 io->io_hdr.nexus.targ_lun = lun; 1036 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1037 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1038 error = ctl_queue(io); 1039 if (error != CTL_RETVAL_COMPLETE) { 1040 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1041 ctl_free_io(io); 1042 } 1043#else 1044 /* 1045 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1046 * just iterate over tasks that are waiting for something - data - and 1047 * terminate those. 1048 */ 1049 CFISCSI_SESSION_LOCK(cs); 1050 TAILQ_FOREACH_SAFE(cdw, 1051 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1052 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1053 if (io == NULL) { 1054 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1055 return; 1056 } 1057 ctl_zero_io(io); 1058 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1059 io->io_hdr.io_type = CTL_IO_TASK; 1060 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1061 io->io_hdr.nexus.targ_port = 1062 cs->cs_target->ct_softc->fe.targ_port; 1063 io->io_hdr.nexus.targ_target.id = 0; 1064 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1065 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1066 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1067 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1068 error = ctl_queue(io); 1069 if (error != CTL_RETVAL_COMPLETE) { 1070 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1071 ctl_free_io(io); 1072 return; 1073 } 1074#if 0 1075 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1076 "0x%x", cdw->cdw_initiator_task_tag); 1077#endif 1078 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1079 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1080 uma_zfree(cfiscsi_data_wait_zone, cdw); 1081 } 1082 CFISCSI_SESSION_UNLOCK(cs); 1083#endif 1084} 1085 1086static void 1087cfiscsi_maintenance_thread(void *arg) 1088{ 1089 struct cfiscsi_session *cs; 1090 1091 cs = arg; 1092 1093 for (;;) { 1094 CFISCSI_SESSION_LOCK(cs); 1095 if (cs->cs_terminating == false) 1096 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1097 CFISCSI_SESSION_UNLOCK(cs); 1098 1099 if (cs->cs_terminating) { 1100 cfiscsi_session_terminate_tasks(cs); 1101 callout_drain(&cs->cs_callout); 1102 1103 icl_conn_shutdown(cs->cs_conn); 1104 icl_conn_close(cs->cs_conn); 1105 1106 cs->cs_terminating++; 1107 1108 /* 1109 * XXX: We used to wait up to 30 seconds to deliver queued PDUs 1110 * to the initiator. We also tried hard to deliver SCSI Responses 1111 * for the aborted PDUs. We don't do that anymore. We might need 1112 * to revisit that. 1113 */ 1114 1115 cfiscsi_session_delete(cs); 1116 kthread_exit(); 1117 return; 1118 } 1119 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1120 } 1121} 1122 1123static void 1124cfiscsi_session_terminate(struct cfiscsi_session *cs) 1125{ 1126 1127 if (cs->cs_terminating != 0) 1128 return; 1129 cs->cs_terminating = 1; 1130 cv_signal(&cs->cs_maintenance_cv); 1131} 1132 1133static int 1134cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1135{ 1136 int error, i; 1137 struct cfiscsi_softc *softc; 1138 1139 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1140 1141 softc = &cfiscsi_softc; 1142 1143 mtx_lock(&softc->lock); 1144 for (i = 0; i < softc->max_initiators; i++) { 1145 if (softc->ctl_initids[i] == 0) 1146 break; 1147 } 1148 if (i == softc->max_initiators) { 1149 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1150 softc->max_initiators); 1151 mtx_unlock(&softc->lock); 1152 return (1); 1153 } 1154 softc->ctl_initids[i] = 1; 1155 mtx_unlock(&softc->lock); 1156 1157#if 0 1158 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1159 i, softc->max_initiators); 1160#endif 1161 cs->cs_ctl_initid = i; 1162 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1163 if (error != 0) { 1164 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1165 mtx_lock(&softc->lock); 1166 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1167 mtx_unlock(&softc->lock); 1168 cs->cs_ctl_initid = -1; 1169 return (1); 1170 } 1171 1172 return (0); 1173} 1174 1175static void 1176cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1177{ 1178 int error; 1179 struct cfiscsi_softc *softc; 1180 1181 if (cs->cs_ctl_initid == -1) 1182 return; 1183 1184 softc = &cfiscsi_softc; 1185 1186 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1187 if (error != 0) { 1188 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1189 error); 1190 } 1191 mtx_lock(&softc->lock); 1192 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1193 mtx_unlock(&softc->lock); 1194 cs->cs_ctl_initid = -1; 1195} 1196 1197static struct cfiscsi_session * 1198cfiscsi_session_new(struct cfiscsi_softc *softc) 1199{ 1200 struct cfiscsi_session *cs; 1201 int error; 1202 1203 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1204 if (cs == NULL) { 1205 CFISCSI_WARN("malloc failed"); 1206 return (NULL); 1207 } 1208 cs->cs_ctl_initid = -1; 1209 1210 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1211 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1212 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1213 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1214#ifdef ICL_KERNEL_PROXY 1215 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1216#endif 1217 1218 cs->cs_conn = icl_conn_new(); 1219 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1220 cs->cs_conn->ic_error = cfiscsi_error_callback; 1221 cs->cs_conn->ic_prv0 = cs; 1222 1223 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1224 if (error != 0) { 1225 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1226 free(cs, M_CFISCSI); 1227 return (NULL); 1228 } 1229 1230 mtx_lock(&softc->lock); 1231 cs->cs_id = softc->last_session_id + 1; 1232 softc->last_session_id++; 1233 mtx_unlock(&softc->lock); 1234 1235 mtx_lock(&softc->lock); 1236 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1237 mtx_unlock(&softc->lock); 1238 1239 /* 1240 * Start pinging the initiator. 1241 */ 1242 callout_init(&cs->cs_callout, 1); 1243 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1244 1245 return (cs); 1246} 1247 1248static void 1249cfiscsi_session_delete(struct cfiscsi_session *cs) 1250{ 1251 struct cfiscsi_softc *softc; 1252 1253 softc = &cfiscsi_softc; 1254 1255 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1256 ("destroying session with outstanding CTL pdus")); 1257 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1258 ("destroying session with non-empty queue")); 1259 1260 cfiscsi_session_unregister_initiator(cs); 1261 if (cs->cs_target != NULL) 1262 cfiscsi_target_release(cs->cs_target); 1263 icl_conn_close(cs->cs_conn); 1264 icl_conn_free(cs->cs_conn); 1265 1266 mtx_lock(&softc->lock); 1267 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1268 mtx_unlock(&softc->lock); 1269 1270 free(cs, M_CFISCSI); 1271} 1272 1273int 1274cfiscsi_init(void) 1275{ 1276 struct cfiscsi_softc *softc; 1277 struct ctl_frontend *fe; 1278 int retval; 1279 1280 softc = &cfiscsi_softc; 1281 retval = 0; 1282 bzero(softc, sizeof(*softc)); 1283 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1284 1285#ifdef ICL_KERNEL_PROXY 1286 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1287#endif 1288 TAILQ_INIT(&softc->sessions); 1289 TAILQ_INIT(&softc->targets); 1290 1291 fe = &softc->fe; 1292 fe->port_type = CTL_PORT_ISCSI; 1293 /* XXX KDM what should the real number be here? */ 1294 fe->num_requested_ctl_io = 4096; 1295 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1296 fe->port_name = softc->port_name; 1297 fe->port_online = cfiscsi_online; 1298 fe->port_offline = cfiscsi_offline; 1299 fe->onoff_arg = softc; 1300 fe->targ_enable = cfiscsi_targ_enable; 1301 fe->targ_disable = cfiscsi_targ_disable; 1302 fe->lun_enable = cfiscsi_lun_enable; 1303 fe->lun_disable = cfiscsi_lun_disable; 1304 fe->targ_lun_arg = softc; 1305 fe->ioctl = cfiscsi_ioctl; 1306 fe->devid = cfiscsi_devid; 1307 fe->fe_datamove = cfiscsi_datamove; 1308 fe->fe_done = cfiscsi_done; 1309 1310 /* XXX KDM what should we report here? */ 1311 /* XXX These should probably be fetched from CTL. */ 1312 fe->max_targets = 1; 1313 fe->max_target_id = 15; 1314 1315 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1316 if (retval != 0) { 1317 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1318 retval); 1319 retval = 1; 1320 goto bailout; 1321 } 1322 1323 softc->max_initiators = fe->max_initiators; 1324 1325 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1326 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1327 UMA_ALIGN_PTR, 0); 1328 1329 return (0); 1330 1331bailout: 1332 return (retval); 1333} 1334 1335static int 1336cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1337{ 1338 1339 switch (what) { 1340 case MOD_LOAD: 1341 return (cfiscsi_init()); 1342 case MOD_UNLOAD: 1343 return (EBUSY); 1344 default: 1345 return (EOPNOTSUPP); 1346 } 1347} 1348 1349#ifdef ICL_KERNEL_PROXY 1350static void 1351cfiscsi_accept(struct socket *so) 1352{ 1353 struct cfiscsi_session *cs; 1354 1355 cs = cfiscsi_session_new(&cfiscsi_softc); 1356 if (cs == NULL) { 1357 CFISCSI_WARN("failed to create session"); 1358 return; 1359 } 1360 1361 icl_conn_handoff_sock(cs->cs_conn, so); 1362 cs->cs_waiting_for_ctld = true; 1363 cv_signal(&cfiscsi_softc.accept_cv); 1364} 1365#endif 1366 1367static void 1368cfiscsi_online(void *arg) 1369{ 1370 struct cfiscsi_softc *softc; 1371 1372 softc = (struct cfiscsi_softc *)arg; 1373 1374 softc->online = 1; 1375#ifdef ICL_KERNEL_PROXY 1376 if (softc->listener != NULL) 1377 icl_listen_free(softc->listener); 1378 softc->listener = icl_listen_new(cfiscsi_accept); 1379#endif 1380} 1381 1382static void 1383cfiscsi_offline(void *arg) 1384{ 1385 struct cfiscsi_softc *softc; 1386 struct cfiscsi_session *cs; 1387 1388 softc = (struct cfiscsi_softc *)arg; 1389 1390 softc->online = 0; 1391 1392 mtx_lock(&softc->lock); 1393 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1394 cfiscsi_session_terminate(cs); 1395 mtx_unlock(&softc->lock); 1396 1397#ifdef ICL_KERNEL_PROXY 1398 icl_listen_free(softc->listener); 1399 softc->listener = NULL; 1400#endif 1401} 1402 1403static int 1404cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1405{ 1406 1407 return (0); 1408} 1409 1410static int 1411cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1412{ 1413 1414 return (0); 1415} 1416 1417static void 1418cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1419{ 1420 struct cfiscsi_softc *softc; 1421 struct cfiscsi_session *cs; 1422 struct cfiscsi_target *ct; 1423 struct ctl_iscsi_handoff_params *cihp; 1424#ifndef ICL_KERNEL_PROXY 1425 int error; 1426#endif 1427 1428 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1429 softc = &cfiscsi_softc; 1430 1431 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1432 cihp->initiator_name, cihp->initiator_addr, 1433 cihp->target_name); 1434 1435 if (softc->online == 0) { 1436 ci->status = CTL_ISCSI_ERROR; 1437 snprintf(ci->error_str, sizeof(ci->error_str), 1438 "%s: port offline", __func__); 1439 return; 1440 } 1441 1442 ct = cfiscsi_target_find(softc, cihp->target_name); 1443 if (ct == NULL) { 1444 ci->status = CTL_ISCSI_ERROR; 1445 snprintf(ci->error_str, sizeof(ci->error_str), 1446 "%s: target not found", __func__); 1447 return; 1448 } 1449 1450#ifdef ICL_KERNEL_PROXY 1451 mtx_lock(&cfiscsi_softc.lock); 1452 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1453 if (cs->cs_id == cihp->socket) 1454 break; 1455 } 1456 if (cs == NULL) { 1457 mtx_unlock(&cfiscsi_softc.lock); 1458 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1459 ci->status = CTL_ISCSI_ERROR; 1460 return; 1461 } 1462 mtx_unlock(&cfiscsi_softc.lock); 1463#else 1464 cs = cfiscsi_session_new(softc); 1465 if (cs == NULL) { 1466 ci->status = CTL_ISCSI_ERROR; 1467 snprintf(ci->error_str, sizeof(ci->error_str), 1468 "%s: cfiscsi_session_new failed", __func__); 1469 cfiscsi_target_release(ct); 1470 return; 1471 } 1472#endif 1473 cs->cs_target = ct; 1474 1475 /* 1476 * First PDU of Full Feature phase has the same CmdSN as the last 1477 * PDU from the Login Phase received from the initiator. Thus, 1478 * the -1 below. 1479 */ 1480 cs->cs_portal_group_tag = cihp->portal_group_tag; 1481 cs->cs_cmdsn = cihp->cmdsn; 1482 cs->cs_statsn = cihp->statsn; 1483 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1484 cs->cs_max_burst_length = cihp->max_burst_length; 1485 cs->cs_immediate_data = !!cihp->immediate_data; 1486 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1487 cs->cs_conn->ic_header_crc32c = true; 1488 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1489 cs->cs_conn->ic_data_crc32c = true; 1490 1491 strlcpy(cs->cs_initiator_name, 1492 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1493 strlcpy(cs->cs_initiator_addr, 1494 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1495 strlcpy(cs->cs_initiator_alias, 1496 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1497 1498#ifdef ICL_KERNEL_PROXY 1499 cs->cs_login_phase = false; 1500#else 1501 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1502 if (error != 0) { 1503 cfiscsi_session_delete(cs); 1504 ci->status = CTL_ISCSI_ERROR; 1505 snprintf(ci->error_str, sizeof(ci->error_str), 1506 "%s: icl_conn_handoff failed with error %d", 1507 __func__, error); 1508 return; 1509 } 1510#endif 1511 1512 /* 1513 * Register initiator with CTL. 1514 */ 1515 cfiscsi_session_register_initiator(cs); 1516 1517#ifdef ICL_KERNEL_PROXY 1518 /* 1519 * First PDU of the Full Feature phase has likely already arrived. 1520 * We have to pick it up and execute properly. 1521 */ 1522 if (cs->cs_login_pdu != NULL) { 1523 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1524 cfiscsi_pdu_handle(cs->cs_login_pdu); 1525 cs->cs_login_pdu = NULL; 1526 } 1527#endif 1528 1529 ci->status = CTL_ISCSI_OK; 1530} 1531 1532static void 1533cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1534{ 1535 struct ctl_iscsi_list_params *cilp; 1536 struct cfiscsi_session *cs; 1537 struct cfiscsi_softc *softc; 1538 struct sbuf *sb; 1539 int error; 1540 1541 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1542 softc = &cfiscsi_softc; 1543 1544 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1545 if (sb == NULL) { 1546 ci->status = CTL_ISCSI_ERROR; 1547 snprintf(ci->error_str, sizeof(ci->error_str), 1548 "Unable to allocate %d bytes for iSCSI session list", 1549 cilp->alloc_len); 1550 return; 1551 } 1552 1553 sbuf_printf(sb, "<ctlislist>\n"); 1554 mtx_lock(&softc->lock); 1555 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1556#ifdef ICL_KERNEL_PROXY 1557 if (cs->cs_target == NULL) 1558 continue; 1559#endif 1560 error = sbuf_printf(sb, "<connection id=\"%d\">" 1561 "<initiator>%s</initiator>" 1562 "<initiator_addr>%s</initiator_addr>" 1563 "<initiator_alias>%s</initiator_alias>" 1564 "<target>%s</target>" 1565 "<target_alias>%s</target_alias>" 1566 "<header_digest>%s</header_digest>" 1567 "<data_digest>%s</data_digest>" 1568 "<max_data_segment_length>%zd</max_data_segment_length>" 1569 "<immediate_data>%d</immediate_data>" 1570 "<iser>%d</iser>" 1571 "</connection>\n", 1572 cs->cs_id, 1573 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1574 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1575 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1576 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1577 cs->cs_max_data_segment_length, 1578 cs->cs_immediate_data, 1579 cs->cs_conn->ic_iser); 1580 if (error != 0) 1581 break; 1582 } 1583 mtx_unlock(&softc->lock); 1584 error = sbuf_printf(sb, "</ctlislist>\n"); 1585 if (error != 0) { 1586 sbuf_delete(sb); 1587 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1588 snprintf(ci->error_str, sizeof(ci->error_str), 1589 "Out of space, %d bytes is too small", cilp->alloc_len); 1590 return; 1591 } 1592 sbuf_finish(sb); 1593 1594 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1595 cilp->fill_len = sbuf_len(sb) + 1; 1596 ci->status = CTL_ISCSI_OK; 1597 sbuf_delete(sb); 1598} 1599 1600static void 1601cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1602{ 1603 struct icl_pdu *response; 1604 struct iscsi_bhs_asynchronous_message *bhsam; 1605 struct ctl_iscsi_terminate_params *citp; 1606 struct cfiscsi_session *cs; 1607 struct cfiscsi_softc *softc; 1608 int found = 0; 1609 1610 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1611 softc = &cfiscsi_softc; 1612 1613 mtx_lock(&softc->lock); 1614 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1615 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1616 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1617 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1618 continue; 1619 1620 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1621 if (response == NULL) { 1622 /* 1623 * Oh well. Just terminate the connection. 1624 */ 1625 } else { 1626 bhsam = (struct iscsi_bhs_asynchronous_message *) 1627 response->ip_bhs; 1628 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1629 bhsam->bhsam_flags = 0x80; 1630 bhsam->bhsam_0xffffffff = 0xffffffff; 1631 bhsam->bhsam_async_event = 1632 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1633 cfiscsi_pdu_queue(response); 1634 } 1635 cfiscsi_session_terminate(cs); 1636 found++; 1637 } 1638 mtx_unlock(&softc->lock); 1639 1640 if (found == 0) { 1641 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1642 snprintf(ci->error_str, sizeof(ci->error_str), 1643 "No matching connections found"); 1644 return; 1645 } 1646 1647 ci->status = CTL_ISCSI_OK; 1648} 1649 1650static void 1651cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1652{ 1653 struct icl_pdu *response; 1654 struct iscsi_bhs_asynchronous_message *bhsam; 1655 struct ctl_iscsi_logout_params *cilp; 1656 struct cfiscsi_session *cs; 1657 struct cfiscsi_softc *softc; 1658 int found = 0; 1659 1660 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1661 softc = &cfiscsi_softc; 1662 1663 mtx_lock(&softc->lock); 1664 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1665 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1666 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1667 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1668 continue; 1669 1670 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1671 if (response == NULL) { 1672 ci->status = CTL_ISCSI_ERROR; 1673 snprintf(ci->error_str, sizeof(ci->error_str), 1674 "Unable to allocate memory"); 1675 mtx_unlock(&softc->lock); 1676 return; 1677 } 1678 bhsam = 1679 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1680 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1681 bhsam->bhsam_flags = 0x80; 1682 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1683 bhsam->bhsam_parameter3 = htons(10); 1684 cfiscsi_pdu_queue(response); 1685 found++; 1686 } 1687 mtx_unlock(&softc->lock); 1688 1689 if (found == 0) { 1690 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1691 snprintf(ci->error_str, sizeof(ci->error_str), 1692 "No matching connections found"); 1693 return; 1694 } 1695 1696 ci->status = CTL_ISCSI_OK; 1697} 1698 1699#ifdef ICL_KERNEL_PROXY 1700static void 1701cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1702{ 1703 struct ctl_iscsi_listen_params *cilp; 1704 struct sockaddr *sa; 1705 int error; 1706 1707 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1708 1709 if (cfiscsi_softc.listener == NULL) { 1710 CFISCSI_DEBUG("no listener"); 1711 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1712 ci->status = CTL_ISCSI_ERROR; 1713 return; 1714 } 1715 1716 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1717 if (error != 0) { 1718 CFISCSI_DEBUG("getsockaddr, error %d", error); 1719 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1720 ci->status = CTL_ISCSI_ERROR; 1721 return; 1722 } 1723 1724 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1725 cilp->socktype, cilp->protocol, sa); 1726 if (error != 0) { 1727 free(sa, M_SONAME); 1728 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1729 snprintf(ci->error_str, sizeof(ci->error_str), 1730 "icl_listen_add failed, error %d", error); 1731 ci->status = CTL_ISCSI_ERROR; 1732 return; 1733 } 1734 1735 ci->status = CTL_ISCSI_OK; 1736} 1737 1738static void 1739cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1740{ 1741 struct ctl_iscsi_accept_params *ciap; 1742 struct cfiscsi_session *cs; 1743 int error; 1744 1745 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1746 1747 mtx_lock(&cfiscsi_softc.lock); 1748 for (;;) { 1749 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1750 if (cs->cs_waiting_for_ctld) 1751 break; 1752 } 1753 if (cs != NULL) 1754 break; 1755 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1756 if (error != 0) { 1757 mtx_unlock(&cfiscsi_softc.lock); 1758 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1759 ci->status = CTL_ISCSI_ERROR; 1760 return; 1761 } 1762 } 1763 mtx_unlock(&cfiscsi_softc.lock); 1764 1765 cs->cs_waiting_for_ctld = false; 1766 cs->cs_login_phase = true; 1767 1768 ciap->connection_id = cs->cs_id; 1769 ci->status = CTL_ISCSI_OK; 1770} 1771 1772static void 1773cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1774{ 1775 struct ctl_iscsi_send_params *cisp; 1776 struct cfiscsi_session *cs; 1777 struct icl_pdu *ip; 1778 size_t datalen; 1779 void *data; 1780 int error; 1781 1782 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1783 1784 mtx_lock(&cfiscsi_softc.lock); 1785 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1786 if (cs->cs_id == cisp->connection_id) 1787 break; 1788 } 1789 if (cs == NULL) { 1790 mtx_unlock(&cfiscsi_softc.lock); 1791 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1792 ci->status = CTL_ISCSI_ERROR; 1793 return; 1794 } 1795 mtx_unlock(&cfiscsi_softc.lock); 1796 1797#if 0 1798 if (cs->cs_login_phase == false) 1799 return (EBUSY); 1800#endif 1801 1802 if (cs->cs_terminating) { 1803 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1804 ci->status = CTL_ISCSI_ERROR; 1805 return; 1806 } 1807 1808 datalen = cisp->data_segment_len; 1809 /* 1810 * XXX 1811 */ 1812 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1813 if (datalen > 65535) { 1814 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1815 ci->status = CTL_ISCSI_ERROR; 1816 return; 1817 } 1818 if (datalen > 0) { 1819 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1820 error = copyin(cisp->data_segment, data, datalen); 1821 if (error != 0) { 1822 free(data, M_CFISCSI); 1823 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1824 ci->status = CTL_ISCSI_ERROR; 1825 return; 1826 } 1827 } 1828 1829 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1830 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1831 if (datalen > 0) { 1832 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1833 free(data, M_CFISCSI); 1834 } 1835 icl_pdu_queue(ip); 1836 ci->status = CTL_ISCSI_OK; 1837} 1838 1839static void 1840cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1841{ 1842 struct ctl_iscsi_receive_params *cirp; 1843 struct cfiscsi_session *cs; 1844 struct icl_pdu *ip; 1845 void *data; 1846 1847 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1848 1849 mtx_lock(&cfiscsi_softc.lock); 1850 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1851 if (cs->cs_id == cirp->connection_id) 1852 break; 1853 } 1854 if (cs == NULL) { 1855 mtx_unlock(&cfiscsi_softc.lock); 1856 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1857 ci->status = CTL_ISCSI_ERROR; 1858 return; 1859 } 1860 mtx_unlock(&cfiscsi_softc.lock); 1861 1862#if 0 1863 if (is->is_login_phase == false) 1864 return (EBUSY); 1865#endif 1866 1867 CFISCSI_SESSION_LOCK(cs); 1868 while (cs->cs_login_pdu == NULL && 1869 cs->cs_terminating == false) 1870 cv_wait(&cs->cs_login_cv, &cs->cs_lock); 1871 if (cs->cs_terminating) { 1872 CFISCSI_SESSION_UNLOCK(cs); 1873 snprintf(ci->error_str, sizeof(ci->error_str), "connection terminating"); 1874 ci->status = CTL_ISCSI_ERROR; 1875 return; 1876 } 1877 ip = cs->cs_login_pdu; 1878 cs->cs_login_pdu = NULL; 1879 CFISCSI_SESSION_UNLOCK(cs); 1880 1881 if (ip->ip_data_len > cirp->data_segment_len) { 1882 icl_pdu_free(ip); 1883 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1884 ci->status = CTL_ISCSI_ERROR; 1885 return; 1886 } 1887 1888 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1889 if (ip->ip_data_len > 0) { 1890 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1891 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1892 copyout(data, cirp->data_segment, ip->ip_data_len); 1893 free(data, M_CFISCSI); 1894 } 1895 1896 icl_pdu_free(ip); 1897 ci->status = CTL_ISCSI_OK; 1898} 1899 1900static void 1901cfiscsi_ioctl_close(struct ctl_iscsi *ci) 1902{ 1903 /* 1904 * XXX 1905 */ 1906} 1907#endif /* !ICL_KERNEL_PROXY */ 1908 1909static int 1910cfiscsi_ioctl(struct cdev *dev, 1911 u_long cmd, caddr_t addr, int flag, struct thread *td) 1912{ 1913 struct ctl_iscsi *ci; 1914 1915 if (cmd != CTL_ISCSI) 1916 return (ENOTTY); 1917 1918 ci = (struct ctl_iscsi *)addr; 1919 switch (ci->type) { 1920 case CTL_ISCSI_HANDOFF: 1921 cfiscsi_ioctl_handoff(ci); 1922 break; 1923 case CTL_ISCSI_LIST: 1924 cfiscsi_ioctl_list(ci); 1925 break; 1926 case CTL_ISCSI_TERMINATE: 1927 cfiscsi_ioctl_terminate(ci); 1928 break; 1929 case CTL_ISCSI_LOGOUT: 1930 cfiscsi_ioctl_logout(ci); 1931 break; 1932#ifdef ICL_KERNEL_PROXY 1933 case CTL_ISCSI_LISTEN: 1934 cfiscsi_ioctl_listen(ci); 1935 break; 1936 case CTL_ISCSI_ACCEPT: 1937 cfiscsi_ioctl_accept(ci); 1938 break; 1939 case CTL_ISCSI_SEND: 1940 cfiscsi_ioctl_send(ci); 1941 break; 1942 case CTL_ISCSI_RECEIVE: 1943 cfiscsi_ioctl_receive(ci); 1944 break; 1945 case CTL_ISCSI_CLOSE: 1946 cfiscsi_ioctl_close(ci); 1947 break; 1948#endif /* ICL_KERNEL_PROXY */ 1949 default: 1950 ci->status = CTL_ISCSI_ERROR; 1951 snprintf(ci->error_str, sizeof(ci->error_str), 1952 "%s: invalid iSCSI request type %d", __func__, ci->type); 1953 break; 1954 } 1955 1956 return (0); 1957} 1958 1959static int 1960cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 1961{ 1962 struct cfiscsi_session *cs; 1963 struct scsi_vpd_device_id *devid_ptr; 1964 struct scsi_vpd_id_descriptor *desc, *desc1; 1965 struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */ 1966 struct scsi_vpd_id_t10 *t10id; 1967 struct ctl_lun *lun; 1968 const struct icl_pdu *request; 1969 size_t devid_len, wwpn_len; 1970 1971 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 1972 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 1973 cs = PDU_SESSION(request); 1974 1975 wwpn_len = strlen(cs->cs_target->ct_name); 1976 wwpn_len += strlen(",t,0x01"); 1977 wwpn_len += 1; /* '\0' */ 1978 if ((wwpn_len % 4) != 0) 1979 wwpn_len += (4 - (wwpn_len % 4)); 1980 1981 devid_len = sizeof(struct scsi_vpd_device_id) + 1982 sizeof(struct scsi_vpd_id_descriptor) + 1983 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 1984 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 1985 sizeof(struct scsi_vpd_id_descriptor) + 1986 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 1987 sizeof(struct scsi_vpd_id_descriptor) + 1988 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 1989 1990 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 1991 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 1992 ctsio->kern_sg_entries = 0; 1993 1994 if (devid_len < alloc_len) { 1995 ctsio->residual = alloc_len - devid_len; 1996 ctsio->kern_data_len = devid_len; 1997 ctsio->kern_total_len = devid_len; 1998 } else { 1999 ctsio->residual = 0; 2000 ctsio->kern_data_len = alloc_len; 2001 ctsio->kern_total_len = alloc_len; 2002 } 2003 ctsio->kern_data_resid = 0; 2004 ctsio->kern_rel_offset = 0; 2005 ctsio->kern_sg_entries = 0; 2006 2007 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2008 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2009 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2010 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 2011 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2012 wwpn_len); 2013 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2014 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2015 2016 if (lun != NULL) 2017 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2018 lun->be_lun->lun_type; 2019 else 2020 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2021 2022 devid_ptr->page_code = SVPD_DEVICE_ID; 2023 2024 scsi_ulto2b(devid_len - 4, devid_ptr->length); 2025 2026 /* 2027 * We're using a LUN association here. i.e., this device ID is a 2028 * per-LUN identifier. 2029 */ 2030 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2031 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2032 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 2033 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2034 2035 /* 2036 * If we've actually got a backend, copy the device id from the 2037 * per-LUN data. Otherwise, set it to all spaces. 2038 */ 2039 if (lun != NULL) { 2040 /* 2041 * Copy the backend's LUN ID. 2042 */ 2043 strncpy((char *)t10id->vendor_spec_id, 2044 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2045 } else { 2046 /* 2047 * No backend, set this to spaces. 2048 */ 2049 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2050 } 2051 2052 /* 2053 * desc1 is for the WWPN which is a port asscociation. 2054 */ 2055 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2056 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2057 SVPD_ID_TYPE_SCSI_NAME; 2058 desc1->length = wwpn_len; 2059 snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x", 2060 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2061 2062 /* 2063 * desc2 is for the Relative Target Port(type 4h) identifier 2064 */ 2065 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2066 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2067 SVPD_ID_TYPE_RELTARG; 2068 desc2->length = 4; 2069 desc2->identifier[3] = 1; 2070 2071 /* 2072 * desc3 is for the Target Port Group(type 5h) identifier 2073 */ 2074 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2075 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2076 SVPD_ID_TYPE_TPORTGRP; 2077 desc3->length = 4; 2078 desc3->identifier[3] = 1; 2079 2080 ctsio->scsi_status = SCSI_STATUS_OK; 2081 2082 ctsio->be_move_done = ctl_config_move_done; 2083 ctl_datamove((union ctl_io *)ctsio); 2084 2085 return (CTL_RETVAL_COMPLETE); 2086} 2087 2088static void 2089cfiscsi_target_hold(struct cfiscsi_target *ct) 2090{ 2091 2092 refcount_acquire(&ct->ct_refcount); 2093} 2094 2095static void 2096cfiscsi_target_release(struct cfiscsi_target *ct) 2097{ 2098 int old; 2099 struct cfiscsi_softc *softc; 2100 2101 softc = ct->ct_softc; 2102 2103 old = ct->ct_refcount; 2104 if (old > 1 && atomic_cmpset_int(&ct->ct_refcount, old, old - 1)) 2105 return; 2106 2107 mtx_lock(&softc->lock); 2108 if (refcount_release(&ct->ct_refcount)) { 2109 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2110 mtx_unlock(&softc->lock); 2111 free(ct, M_CFISCSI); 2112 2113 return; 2114 } 2115 mtx_unlock(&softc->lock); 2116} 2117 2118static struct cfiscsi_target * 2119cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2120{ 2121 struct cfiscsi_target *ct; 2122 2123 mtx_lock(&softc->lock); 2124 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2125 if (strcmp(name, ct->ct_name) != 0) 2126 continue; 2127 cfiscsi_target_hold(ct); 2128 mtx_unlock(&softc->lock); 2129 return (ct); 2130 } 2131 mtx_unlock(&softc->lock); 2132 2133 return (NULL); 2134} 2135 2136static struct cfiscsi_target * 2137cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2138 const char *alias) 2139{ 2140 struct cfiscsi_target *ct, *newct; 2141 int i; 2142 2143 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2144 return (NULL); 2145 2146 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2147 2148 mtx_lock(&softc->lock); 2149 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2150 if (strcmp(name, ct->ct_name) != 0) 2151 continue; 2152 cfiscsi_target_hold(ct); 2153 mtx_unlock(&softc->lock); 2154 free(newct, M_CFISCSI); 2155 return (ct); 2156 } 2157 2158 for (i = 0; i < CTL_MAX_LUNS; i++) 2159 newct->ct_luns[i] = -1; 2160 2161 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2162 if (alias != NULL) 2163 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2164 refcount_init(&newct->ct_refcount, 1); 2165 newct->ct_softc = softc; 2166 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2167 mtx_unlock(&softc->lock); 2168 2169 return (newct); 2170} 2171 2172/* 2173 * Takes LUN from the target space and returns LUN from the CTL space. 2174 */ 2175static uint32_t 2176cfiscsi_map_lun(void *arg, uint32_t lun) 2177{ 2178 struct cfiscsi_session *cs; 2179 2180 cs = arg; 2181 2182 if (lun >= CTL_MAX_LUNS) { 2183 CFISCSI_DEBUG("requested lun number %d is higher " 2184 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2185 return (0xffffffff); 2186 } 2187 2188 if (cs->cs_target->ct_luns[lun] < 0) 2189 return (0xffffffff); 2190 2191 return (cs->cs_target->ct_luns[lun]); 2192} 2193 2194static int 2195cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2196 unsigned long lun_id, unsigned long ctl_lun_id) 2197{ 2198 2199 if (lun_id >= CTL_MAX_LUNS) { 2200 CFISCSI_WARN("requested lun number %ld is higher " 2201 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2202 return (-1); 2203 } 2204 2205 if (ct->ct_luns[lun_id] >= 0) { 2206 /* 2207 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2208 * when the LUN is created, and a second time just before 2209 * the port is brought online; don't emit warnings 2210 * for that case. 2211 */ 2212 if (ct->ct_luns[lun_id] == ctl_lun_id) 2213 return (0); 2214 CFISCSI_WARN("lun %ld already allocated", lun_id); 2215 return (-1); 2216 } 2217 2218#if 0 2219 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2220 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2221#endif 2222 2223 ct->ct_luns[lun_id] = ctl_lun_id; 2224 cfiscsi_target_hold(ct); 2225 2226 return (0); 2227} 2228 2229static int 2230cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2231{ 2232 2233 if (ct->ct_luns[lun_id] < 0) { 2234 CFISCSI_WARN("lun %ld not allocated", lun_id); 2235 return (-1); 2236 } 2237 2238 ct->ct_luns[lun_id] = -1; 2239 cfiscsi_target_release(ct); 2240 2241 return (0); 2242} 2243 2244static int 2245cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2246{ 2247 struct cfiscsi_softc *softc; 2248 struct cfiscsi_target *ct; 2249 struct ctl_be_lun_option *opt; 2250 const char *target = NULL, *target_alias = NULL; 2251 const char *lun = NULL; 2252 unsigned long tmp; 2253 2254 softc = (struct cfiscsi_softc *)arg; 2255 2256 STAILQ_FOREACH(opt, 2257 &control_softc->ctl_luns[lun_id]->be_lun->options, links) { 2258 if (strcmp(opt->name, "cfiscsi_target") == 0) 2259 target = opt->value; 2260 else if (strcmp(opt->name, "cfiscsi_target_alias") == 0) 2261 target_alias = opt->value; 2262 else if (strcmp(opt->name, "cfiscsi_lun") == 0) 2263 lun = opt->value; 2264 } 2265 2266 if (target == NULL && lun == NULL) 2267 return (0); 2268 2269 if (target == NULL || lun == NULL) { 2270 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2271 "cfiscsi_lun, or the other way around; ignoring"); 2272 return (0); 2273 } 2274 2275 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2276 if (ct == NULL) { 2277 CFISCSI_WARN("failed to create target \"%s\"", target); 2278 return (0); 2279 } 2280 2281 tmp = strtoul(lun, NULL, 10); 2282 cfiscsi_target_set_lun(ct, tmp, lun_id); 2283 return (0); 2284} 2285 2286static int 2287cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2288{ 2289 struct cfiscsi_softc *softc; 2290 struct cfiscsi_target *ct; 2291 int i; 2292 2293 softc = (struct cfiscsi_softc *)arg; 2294 2295 mtx_lock(&softc->lock); 2296 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2297 for (i = 0; i < CTL_MAX_LUNS; i++) { 2298 if (ct->ct_luns[i] < 0) 2299 continue; 2300 if (ct->ct_luns[i] != lun_id) 2301 continue; 2302 cfiscsi_target_unset_lun(ct, i); 2303 break; 2304 } 2305 } 2306 mtx_unlock(&softc->lock); 2307 return (0); 2308} 2309 2310static void 2311cfiscsi_datamove_in(union ctl_io *io) 2312{ 2313 struct cfiscsi_session *cs; 2314 struct icl_pdu *request, *response; 2315 const struct iscsi_bhs_scsi_command *bhssc; 2316 struct iscsi_bhs_data_in *bhsdi; 2317 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2318 size_t copy_len, len, off; 2319 const char *addr; 2320 int ctl_sg_count, error, i; 2321 2322 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2323 cs = PDU_SESSION(request); 2324 2325 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2326 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2327 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2328 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2329 2330 if (io->scsiio.kern_sg_entries > 0) { 2331 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2332 ctl_sg_count = io->scsiio.kern_sg_entries; 2333 } else { 2334 ctl_sglist = &ctl_sg_entry; 2335 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2336 ctl_sglist->len = io->scsiio.kern_data_len; 2337 ctl_sg_count = 1; 2338 } 2339 2340 /* 2341 * We need to record it so that we can properly report 2342 * underflow/underflow. 2343 */ 2344 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2345 2346 /* 2347 * This is the offset within the current SCSI command; 2348 * i.e. for the first call of datamove(), it will be 0, 2349 * and for subsequent ones it will be the sum of lengths 2350 * of previous ones. 2351 */ 2352 off = htonl(io->scsiio.kern_rel_offset); 2353 2354 i = 0; 2355 addr = NULL; 2356 len = 0; 2357 response = NULL; 2358 bhsdi = NULL; 2359 for (;;) { 2360 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2361 if (response == NULL) { 2362 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2363 if (response == NULL) { 2364 CFISCSI_SESSION_WARN(cs, "failed to " 2365 "allocate memory; dropping connection"); 2366 ctl_set_busy(&io->scsiio); 2367 io->scsiio.be_move_done(io); 2368 cfiscsi_session_terminate(cs); 2369 return; 2370 } 2371 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2372 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2373 bhsdi->bhsdi_initiator_task_tag = 2374 bhssc->bhssc_initiator_task_tag; 2375 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2376 PDU_EXPDATASN(request)++; 2377 bhsdi->bhsdi_buffer_offset = htonl(off); 2378 } 2379 2380 if (len == 0) { 2381 addr = ctl_sglist[i].addr; 2382 len = ctl_sglist[i].len; 2383 KASSERT(len > 0, ("len <= 0")); 2384 } 2385 2386 copy_len = len; 2387 if (response->ip_data_len + copy_len > 2388 cs->cs_max_data_segment_length) 2389 copy_len = cs->cs_max_data_segment_length - 2390 response->ip_data_len; 2391 KASSERT(copy_len <= len, ("copy_len > len")); 2392 error = icl_pdu_append_data(response, addr, copy_len, M_NOWAIT); 2393 if (error != 0) { 2394 CFISCSI_SESSION_WARN(cs, "failed to " 2395 "allocate memory; dropping connection"); 2396 icl_pdu_free(response); 2397 ctl_set_busy(&io->scsiio); 2398 io->scsiio.be_move_done(io); 2399 cfiscsi_session_terminate(cs); 2400 return; 2401 } 2402 addr += copy_len; 2403 len -= copy_len; 2404 off += copy_len; 2405 io->scsiio.ext_data_filled += copy_len; 2406 2407 if (len == 0) { 2408 /* 2409 * End of scatter-gather segment; 2410 * proceed to the next one... 2411 */ 2412 if (i == ctl_sg_count - 1) { 2413 /* 2414 * ... unless this was the last one. 2415 */ 2416 break; 2417 } 2418 i++; 2419 } 2420 2421 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2422 /* 2423 * Can't stuff more data into the current PDU; 2424 * queue it. Note that's not enough to check 2425 * for kern_data_resid == 0 instead; there 2426 * may be several Data-In PDUs for the final 2427 * call to cfiscsi_datamove(), and we want 2428 * to set the F flag only on the last of them. 2429 */ 2430 if (off == io->scsiio.kern_total_len) 2431 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2432 KASSERT(response->ip_data_len > 0, 2433 ("sending empty Data-In")); 2434 cfiscsi_pdu_queue(response); 2435 response = NULL; 2436 bhsdi = NULL; 2437 } 2438 } 2439 KASSERT(i == ctl_sg_count - 1, ("missed SG segment")); 2440 KASSERT(len == 0, ("missed data from SG segment")); 2441 if (response != NULL) { 2442 if (off == io->scsiio.kern_total_len) { 2443 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2444#if 0 2445 } else { 2446 CFISCSI_SESSION_DEBUG(cs, "not setting the F flag; " 2447 "have %zd, need %zd", off, 2448 (size_t)io->scsiio.kern_total_len); 2449#endif 2450 } 2451 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2452 cfiscsi_pdu_queue(response); 2453 } 2454 2455 io->scsiio.be_move_done(io); 2456} 2457 2458static void 2459cfiscsi_datamove_out(union ctl_io *io) 2460{ 2461 struct cfiscsi_session *cs; 2462 struct icl_pdu *request, *response; 2463 const struct iscsi_bhs_scsi_command *bhssc; 2464 struct iscsi_bhs_r2t *bhsr2t; 2465 struct cfiscsi_data_wait *cdw; 2466 uint32_t target_transfer_tag; 2467 bool done; 2468 2469 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2470 cs = PDU_SESSION(request); 2471 2472 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2473 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2474 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2475 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2476 2477 /* 2478 * We need to record it so that we can properly report 2479 * underflow/underflow. 2480 */ 2481 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2482 2483 CFISCSI_SESSION_LOCK(cs); 2484 target_transfer_tag = cs->cs_target_transfer_tag; 2485 cs->cs_target_transfer_tag++; 2486 CFISCSI_SESSION_UNLOCK(cs); 2487 2488#if 0 2489 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2490 "task tag 0x%x, target transfer tag 0x%x", 2491 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2492#endif 2493 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2494 if (cdw == NULL) { 2495 CFISCSI_SESSION_WARN(cs, "failed to " 2496 "allocate memory; dropping connection"); 2497 ctl_set_busy(&io->scsiio); 2498 io->scsiio.be_move_done(io); 2499 cfiscsi_session_terminate(cs); 2500 return; 2501 } 2502 cdw->cdw_ctl_io = io; 2503 cdw->cdw_target_transfer_tag = htonl(target_transfer_tag); 2504 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2505 2506 if (cs->cs_immediate_data && icl_pdu_data_segment_length(request) > 0) { 2507 done = cfiscsi_handle_data_segment(request, cdw); 2508 if (done) { 2509 uma_zfree(cfiscsi_data_wait_zone, cdw); 2510 io->scsiio.be_move_done(io); 2511 return; 2512 } 2513 2514#if 0 2515 if (io->scsiio.ext_data_filled != 0) 2516 CFISCSI_SESSION_DEBUG(cs, "got %zd bytes of immediate data, need %zd", 2517 io->scsiio.ext_data_filled, io->scsiio.kern_data_len); 2518#endif 2519 } 2520 2521 CFISCSI_SESSION_LOCK(cs); 2522 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2523 CFISCSI_SESSION_UNLOCK(cs); 2524 2525 /* 2526 * XXX: We should limit the number of outstanding R2T PDUs 2527 * per task to MaxOutstandingR2T. 2528 */ 2529 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2530 if (response == NULL) { 2531 CFISCSI_SESSION_WARN(cs, "failed to " 2532 "allocate memory; dropping connection"); 2533 ctl_set_busy(&io->scsiio); 2534 io->scsiio.be_move_done(io); 2535 cfiscsi_session_terminate(cs); 2536 return; 2537 } 2538 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2539 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2540 bhsr2t->bhsr2t_flags = 0x80; 2541 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2542 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2543 bhsr2t->bhsr2t_target_transfer_tag = htonl(target_transfer_tag); 2544 /* 2545 * XXX: Here we assume that cfiscsi_datamove() won't ever 2546 * be running concurrently on several CPUs for a given 2547 * command. 2548 */ 2549 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2550 PDU_R2TSN(request)++; 2551 /* 2552 * This is the offset within the current SCSI command; 2553 * i.e. for the first call of datamove(), it will be 0, 2554 * and for subsequent ones it will be the sum of lengths 2555 * of previous ones. 2556 * 2557 * The ext_data_filled is to account for unsolicited 2558 * (immediate) data that might have already arrived. 2559 */ 2560 bhsr2t->bhsr2t_buffer_offset = 2561 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2562 /* 2563 * This is the total length (sum of S/G lengths) this call 2564 * to cfiscsi_datamove() is supposed to handle. 2565 * 2566 * XXX: Limit it to MaxBurstLength. 2567 */ 2568 bhsr2t->bhsr2t_desired_data_transfer_length = 2569 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2570 cfiscsi_pdu_queue(response); 2571} 2572 2573static void 2574cfiscsi_datamove(union ctl_io *io) 2575{ 2576 2577 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2578 cfiscsi_datamove_in(io); 2579 else 2580 cfiscsi_datamove_out(io); 2581} 2582 2583static void 2584cfiscsi_scsi_command_done(union ctl_io *io) 2585{ 2586 struct icl_pdu *request, *response; 2587 struct iscsi_bhs_scsi_command *bhssc; 2588 struct iscsi_bhs_scsi_response *bhssr; 2589#ifdef DIAGNOSTIC 2590 struct cfiscsi_data_wait *cdw; 2591#endif 2592 struct cfiscsi_session *cs; 2593 uint16_t sense_length; 2594 2595 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2596 cs = PDU_SESSION(request); 2597 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2598 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2599 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2600 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2601 2602 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2603 // bhssc->bhssc_initiator_task_tag); 2604 2605#ifdef DIAGNOSTIC 2606 CFISCSI_SESSION_LOCK(cs); 2607 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2608 KASSERT(bhssc->bhssc_initiator_task_tag != 2609 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2610 CFISCSI_SESSION_UNLOCK(cs); 2611#endif 2612 2613 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2614 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2615 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2616 bhssr->bhssr_flags = 0x80; 2617 /* 2618 * XXX: We don't deal with bidirectional under/overflows; 2619 * does anything actually support those? 2620 */ 2621 if (PDU_TOTAL_TRANSFER_LEN(request) < 2622 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2623 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2624 bhssr->bhssr_residual_count = 2625 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2626 PDU_TOTAL_TRANSFER_LEN(request)); 2627 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2628 // ntohl(bhssr->bhssr_residual_count)); 2629 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2630 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2631 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2632 bhssr->bhssr_residual_count = 2633 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2634 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2635 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2636 // ntohl(bhssr->bhssr_residual_count)); 2637 } 2638 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2639 bhssr->bhssr_status = io->scsiio.scsi_status; 2640 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2641 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2642 2643 if (io->scsiio.sense_len > 0) { 2644#if 0 2645 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2646 io->scsiio.sense_len); 2647#endif 2648 sense_length = htons(io->scsiio.sense_len); 2649 icl_pdu_append_data(response, 2650 &sense_length, sizeof(sense_length), M_WAITOK); 2651 icl_pdu_append_data(response, 2652 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2653 } 2654 2655 ctl_free_io(io); 2656 icl_pdu_free(request); 2657 cfiscsi_pdu_queue(response); 2658} 2659 2660static void 2661cfiscsi_task_management_done(union ctl_io *io) 2662{ 2663 struct icl_pdu *request, *response; 2664 struct iscsi_bhs_task_management_request *bhstmr; 2665 struct iscsi_bhs_task_management_response *bhstmr2; 2666 struct cfiscsi_data_wait *cdw, *tmpcdw; 2667 struct cfiscsi_session *cs; 2668 2669 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2670 cs = PDU_SESSION(request); 2671 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2672 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2673 ISCSI_BHS_OPCODE_TASK_REQUEST, 2674 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2675 2676#if 0 2677 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2678 bhstmr->bhstmr_initiator_task_tag, 2679 bhstmr->bhstmr_referenced_task_tag); 2680#endif 2681 2682 if ((bhstmr->bhstmr_function & ~0x80) == 2683 BHSTMR_FUNCTION_ABORT_TASK) { 2684 /* 2685 * Make sure we no longer wait for Data-Out for this command. 2686 */ 2687 CFISCSI_SESSION_LOCK(cs); 2688 TAILQ_FOREACH_SAFE(cdw, 2689 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2690 if (bhstmr->bhstmr_referenced_task_tag != 2691 cdw->cdw_initiator_task_tag) 2692 continue; 2693 2694#if 0 2695 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2696 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2697#endif 2698 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2699 cdw, cdw_next); 2700 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2701 uma_zfree(cfiscsi_data_wait_zone, cdw); 2702 } 2703 CFISCSI_SESSION_UNLOCK(cs); 2704 } 2705 2706 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2707 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2708 response->ip_bhs; 2709 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2710 bhstmr2->bhstmr_flags = 0x80; 2711 if (io->io_hdr.status == CTL_SUCCESS) { 2712 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2713 } else { 2714 /* 2715 * XXX: How to figure out what exactly went wrong? iSCSI spec 2716 * expects us to provide detailed error, e.g. "Task does 2717 * not exist" or "LUN does not exist". 2718 */ 2719 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2720 bhstmr2->bhstmr_response = 2721 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2722 } 2723 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2724 2725 ctl_free_io(io); 2726 icl_pdu_free(request); 2727 cfiscsi_pdu_queue(response); 2728} 2729 2730static void 2731cfiscsi_done(union ctl_io *io) 2732{ 2733 struct icl_pdu *request; 2734 struct cfiscsi_session *cs; 2735 2736 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2737 ("invalid CTL status %#x", io->io_hdr.status)); 2738 2739 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2740 if (request == NULL) { 2741 /* 2742 * Implicit task termination has just completed; nothing to do. 2743 */ 2744 return; 2745 } 2746 2747 cs = PDU_SESSION(request); 2748 refcount_release(&cs->cs_outstanding_ctl_pdus); 2749 2750 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2751 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2752 cfiscsi_scsi_command_done(io); 2753 break; 2754 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2755 cfiscsi_task_management_done(io); 2756 break; 2757 default: 2758 panic("cfiscsi_done called with wrong opcode 0x%x", 2759 request->ip_bhs->bhs_opcode); 2760 } 2761} 2762