ctl_frontend_iscsi.c revision 264524
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 264524 2014-04-16 10:06:37Z 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 264524 2014-04-16 10:06:37Z 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_RWTUN, 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_RWTUN, 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_RWTUN, 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_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_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 atomic_add_int(&cs->cs_timeout, 1); 971 972#ifdef ICL_KERNEL_PROXY 973 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 974 if (cs->cs_timeout > login_timeout) { 975 CFISCSI_SESSION_WARN(cs, "login timed out after " 976 "%d seconds; dropping connection", cs->cs_timeout); 977 cfiscsi_session_terminate(cs); 978 } 979 return; 980 } 981#endif 982 983 if (cs->cs_timeout >= ping_timeout) { 984 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 985 "dropping connection", ping_timeout); 986 cfiscsi_session_terminate(cs); 987 return; 988 } 989 990 /* 991 * If the ping was reset less than one second ago - which means 992 * that we've received some PDU during the last second - assume 993 * the traffic flows correctly and don't bother sending a NOP-Out. 994 * 995 * (It's 2 - one for one second, and one for incrementing is_timeout 996 * earlier in this routine.) 997 */ 998 if (cs->cs_timeout < 2) 999 return; 1000 1001 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1002 if (cp == NULL) { 1003 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1004 return; 1005 } 1006 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1007 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1008 bhsni->bhsni_flags = 0x80; 1009 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1010 1011 cfiscsi_pdu_queue(cp); 1012} 1013 1014static void 1015cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1016{ 1017 struct cfiscsi_data_wait *cdw, *tmpcdw; 1018 union ctl_io *io; 1019 int error; 1020 1021#ifdef notyet 1022 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1023 if (io == NULL) { 1024 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1025 return; 1026 } 1027 ctl_zero_io(io); 1028 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1029 io->io_hdr.io_type = CTL_IO_TASK; 1030 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1031 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1032 io->io_hdr.nexus.targ_target.id = 0; 1033 io->io_hdr.nexus.targ_lun = lun; 1034 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1035 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1036 error = ctl_queue(io); 1037 if (error != CTL_RETVAL_COMPLETE) { 1038 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1039 ctl_free_io(io); 1040 } 1041#else 1042 /* 1043 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1044 * just iterate over tasks that are waiting for something - data - and 1045 * terminate those. 1046 */ 1047 CFISCSI_SESSION_LOCK(cs); 1048 TAILQ_FOREACH_SAFE(cdw, 1049 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1050 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1051 if (io == NULL) { 1052 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1053 return; 1054 } 1055 ctl_zero_io(io); 1056 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1057 io->io_hdr.io_type = CTL_IO_TASK; 1058 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1059 io->io_hdr.nexus.targ_port = 1060 cs->cs_target->ct_softc->fe.targ_port; 1061 io->io_hdr.nexus.targ_target.id = 0; 1062 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1063 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1064 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1065 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1066 error = ctl_queue(io); 1067 if (error != CTL_RETVAL_COMPLETE) { 1068 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1069 ctl_free_io(io); 1070 return; 1071 } 1072#if 0 1073 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1074 "0x%x", cdw->cdw_initiator_task_tag); 1075#endif 1076 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1077 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1078 uma_zfree(cfiscsi_data_wait_zone, cdw); 1079 } 1080 CFISCSI_SESSION_UNLOCK(cs); 1081#endif 1082} 1083 1084static void 1085cfiscsi_maintenance_thread(void *arg) 1086{ 1087 struct cfiscsi_session *cs; 1088 1089 cs = arg; 1090 1091 for (;;) { 1092 CFISCSI_SESSION_LOCK(cs); 1093 if (cs->cs_terminating == false) 1094 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1095 CFISCSI_SESSION_UNLOCK(cs); 1096 1097 if (cs->cs_terminating) { 1098 cfiscsi_session_terminate_tasks(cs); 1099 callout_drain(&cs->cs_callout); 1100 1101 icl_conn_shutdown(cs->cs_conn); 1102 icl_conn_close(cs->cs_conn); 1103 1104 cs->cs_terminating++; 1105 1106 /* 1107 * XXX: We used to wait up to 30 seconds to deliver queued PDUs 1108 * to the initiator. We also tried hard to deliver SCSI Responses 1109 * for the aborted PDUs. We don't do that anymore. We might need 1110 * to revisit that. 1111 */ 1112 1113 cfiscsi_session_delete(cs); 1114 kthread_exit(); 1115 return; 1116 } 1117 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1118 } 1119} 1120 1121static void 1122cfiscsi_session_terminate(struct cfiscsi_session *cs) 1123{ 1124 1125 if (cs->cs_terminating != 0) 1126 return; 1127 cs->cs_terminating = 1; 1128 cv_signal(&cs->cs_maintenance_cv); 1129} 1130 1131static int 1132cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1133{ 1134 int error, i; 1135 struct cfiscsi_softc *softc; 1136 1137 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1138 1139 softc = &cfiscsi_softc; 1140 1141 mtx_lock(&softc->lock); 1142 for (i = 0; i < softc->max_initiators; i++) { 1143 if (softc->ctl_initids[i] == 0) 1144 break; 1145 } 1146 if (i == softc->max_initiators) { 1147 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1148 softc->max_initiators); 1149 mtx_unlock(&softc->lock); 1150 return (1); 1151 } 1152 softc->ctl_initids[i] = 1; 1153 mtx_unlock(&softc->lock); 1154 1155#if 0 1156 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1157 i, softc->max_initiators); 1158#endif 1159 cs->cs_ctl_initid = i; 1160 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1161 if (error != 0) { 1162 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1163 mtx_lock(&softc->lock); 1164 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1165 mtx_unlock(&softc->lock); 1166 cs->cs_ctl_initid = -1; 1167 return (1); 1168 } 1169 1170 return (0); 1171} 1172 1173static void 1174cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1175{ 1176 int error; 1177 struct cfiscsi_softc *softc; 1178 1179 if (cs->cs_ctl_initid == -1) 1180 return; 1181 1182 softc = &cfiscsi_softc; 1183 1184 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1185 if (error != 0) { 1186 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1187 error); 1188 } 1189 mtx_lock(&softc->lock); 1190 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1191 mtx_unlock(&softc->lock); 1192 cs->cs_ctl_initid = -1; 1193} 1194 1195static struct cfiscsi_session * 1196cfiscsi_session_new(struct cfiscsi_softc *softc) 1197{ 1198 struct cfiscsi_session *cs; 1199 int error; 1200 1201 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1202 if (cs == NULL) { 1203 CFISCSI_WARN("malloc failed"); 1204 return (NULL); 1205 } 1206 cs->cs_ctl_initid = -1; 1207 1208 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1209 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1210 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1211 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1212#ifdef ICL_KERNEL_PROXY 1213 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1214#endif 1215 1216 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1217 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1218 cs->cs_conn->ic_error = cfiscsi_error_callback; 1219 cs->cs_conn->ic_prv0 = cs; 1220 1221 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1222 if (error != 0) { 1223 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1224 free(cs, M_CFISCSI); 1225 return (NULL); 1226 } 1227 1228 mtx_lock(&softc->lock); 1229 cs->cs_id = softc->last_session_id + 1; 1230 softc->last_session_id++; 1231 mtx_unlock(&softc->lock); 1232 1233 mtx_lock(&softc->lock); 1234 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1235 mtx_unlock(&softc->lock); 1236 1237 /* 1238 * Start pinging the initiator. 1239 */ 1240 callout_init(&cs->cs_callout, 1); 1241 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1242 1243 return (cs); 1244} 1245 1246static void 1247cfiscsi_session_delete(struct cfiscsi_session *cs) 1248{ 1249 struct cfiscsi_softc *softc; 1250 1251 softc = &cfiscsi_softc; 1252 1253 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1254 ("destroying session with outstanding CTL pdus")); 1255 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1256 ("destroying session with non-empty queue")); 1257 1258 cfiscsi_session_unregister_initiator(cs); 1259 if (cs->cs_target != NULL) 1260 cfiscsi_target_release(cs->cs_target); 1261 icl_conn_close(cs->cs_conn); 1262 icl_conn_free(cs->cs_conn); 1263 1264 mtx_lock(&softc->lock); 1265 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1266 mtx_unlock(&softc->lock); 1267 1268 free(cs, M_CFISCSI); 1269} 1270 1271int 1272cfiscsi_init(void) 1273{ 1274 struct cfiscsi_softc *softc; 1275 struct ctl_frontend *fe; 1276 int retval; 1277 1278 softc = &cfiscsi_softc; 1279 retval = 0; 1280 bzero(softc, sizeof(*softc)); 1281 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1282 1283#ifdef ICL_KERNEL_PROXY 1284 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1285#endif 1286 TAILQ_INIT(&softc->sessions); 1287 TAILQ_INIT(&softc->targets); 1288 1289 fe = &softc->fe; 1290 fe->port_type = CTL_PORT_ISCSI; 1291 /* XXX KDM what should the real number be here? */ 1292 fe->num_requested_ctl_io = 4096; 1293 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1294 fe->port_name = softc->port_name; 1295 fe->port_online = cfiscsi_online; 1296 fe->port_offline = cfiscsi_offline; 1297 fe->onoff_arg = softc; 1298 fe->targ_enable = cfiscsi_targ_enable; 1299 fe->targ_disable = cfiscsi_targ_disable; 1300 fe->lun_enable = cfiscsi_lun_enable; 1301 fe->lun_disable = cfiscsi_lun_disable; 1302 fe->targ_lun_arg = softc; 1303 fe->ioctl = cfiscsi_ioctl; 1304 fe->devid = cfiscsi_devid; 1305 fe->fe_datamove = cfiscsi_datamove; 1306 fe->fe_done = cfiscsi_done; 1307 1308 /* XXX KDM what should we report here? */ 1309 /* XXX These should probably be fetched from CTL. */ 1310 fe->max_targets = 1; 1311 fe->max_target_id = 15; 1312 1313 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1314 if (retval != 0) { 1315 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1316 retval); 1317 retval = 1; 1318 goto bailout; 1319 } 1320 1321 softc->max_initiators = fe->max_initiators; 1322 1323 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1324 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1325 UMA_ALIGN_PTR, 0); 1326 1327 return (0); 1328 1329bailout: 1330 return (retval); 1331} 1332 1333static int 1334cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1335{ 1336 1337 switch (what) { 1338 case MOD_LOAD: 1339 return (cfiscsi_init()); 1340 case MOD_UNLOAD: 1341 return (EBUSY); 1342 default: 1343 return (EOPNOTSUPP); 1344 } 1345} 1346 1347#ifdef ICL_KERNEL_PROXY 1348static void 1349cfiscsi_accept(struct socket *so) 1350{ 1351 struct cfiscsi_session *cs; 1352 1353 cs = cfiscsi_session_new(&cfiscsi_softc); 1354 if (cs == NULL) { 1355 CFISCSI_WARN("failed to create session"); 1356 return; 1357 } 1358 1359 icl_conn_handoff_sock(cs->cs_conn, so); 1360 cs->cs_waiting_for_ctld = true; 1361 cv_signal(&cfiscsi_softc.accept_cv); 1362} 1363#endif 1364 1365static void 1366cfiscsi_online(void *arg) 1367{ 1368 struct cfiscsi_softc *softc; 1369 1370 softc = (struct cfiscsi_softc *)arg; 1371 1372 softc->online = 1; 1373#ifdef ICL_KERNEL_PROXY 1374 if (softc->listener != NULL) 1375 icl_listen_free(softc->listener); 1376 softc->listener = icl_listen_new(cfiscsi_accept); 1377#endif 1378} 1379 1380static void 1381cfiscsi_offline(void *arg) 1382{ 1383 struct cfiscsi_softc *softc; 1384 struct cfiscsi_session *cs; 1385 1386 softc = (struct cfiscsi_softc *)arg; 1387 1388 softc->online = 0; 1389 1390 mtx_lock(&softc->lock); 1391 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1392 cfiscsi_session_terminate(cs); 1393 mtx_unlock(&softc->lock); 1394 1395#ifdef ICL_KERNEL_PROXY 1396 icl_listen_free(softc->listener); 1397 softc->listener = NULL; 1398#endif 1399} 1400 1401static int 1402cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1403{ 1404 1405 return (0); 1406} 1407 1408static int 1409cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1410{ 1411 1412 return (0); 1413} 1414 1415static void 1416cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1417{ 1418 struct cfiscsi_softc *softc; 1419 struct cfiscsi_session *cs; 1420 struct cfiscsi_target *ct; 1421 struct ctl_iscsi_handoff_params *cihp; 1422 int error; 1423 1424 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1425 softc = &cfiscsi_softc; 1426 1427 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1428 cihp->initiator_name, cihp->initiator_addr, 1429 cihp->target_name); 1430 1431 if (softc->online == 0) { 1432 ci->status = CTL_ISCSI_ERROR; 1433 snprintf(ci->error_str, sizeof(ci->error_str), 1434 "%s: port offline", __func__); 1435 return; 1436 } 1437 1438 ct = cfiscsi_target_find(softc, cihp->target_name); 1439 if (ct == NULL) { 1440 ci->status = CTL_ISCSI_ERROR; 1441 snprintf(ci->error_str, sizeof(ci->error_str), 1442 "%s: target not found", __func__); 1443 return; 1444 } 1445 1446#ifdef ICL_KERNEL_PROXY 1447 if (cihp->socket > 0 && cihp->connection_id > 0) { 1448 snprintf(ci->error_str, sizeof(ci->error_str), 1449 "both socket and connection_id set"); 1450 ci->status = CTL_ISCSI_ERROR; 1451 cfiscsi_target_release(ct); 1452 return; 1453 } 1454 if (cihp->socket == 0) { 1455 mtx_lock(&cfiscsi_softc.lock); 1456 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1457 if (cs->cs_id == cihp->socket) 1458 break; 1459 } 1460 if (cs == NULL) { 1461 mtx_unlock(&cfiscsi_softc.lock); 1462 snprintf(ci->error_str, sizeof(ci->error_str), 1463 "connection not found"); 1464 ci->status = CTL_ISCSI_ERROR; 1465 cfiscsi_target_release(ct); 1466 return; 1467 } 1468 mtx_unlock(&cfiscsi_softc.lock); 1469 } else { 1470#endif 1471 cs = cfiscsi_session_new(softc); 1472 if (cs == NULL) { 1473 ci->status = CTL_ISCSI_ERROR; 1474 snprintf(ci->error_str, sizeof(ci->error_str), 1475 "%s: cfiscsi_session_new failed", __func__); 1476 cfiscsi_target_release(ct); 1477 return; 1478 } 1479#ifdef ICL_KERNEL_PROXY 1480 } 1481#endif 1482 cs->cs_target = ct; 1483 1484 /* 1485 * First PDU of Full Feature phase has the same CmdSN as the last 1486 * PDU from the Login Phase received from the initiator. Thus, 1487 * the -1 below. 1488 */ 1489 cs->cs_portal_group_tag = cihp->portal_group_tag; 1490 cs->cs_cmdsn = cihp->cmdsn; 1491 cs->cs_statsn = cihp->statsn; 1492 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1493 cs->cs_max_burst_length = cihp->max_burst_length; 1494 cs->cs_immediate_data = !!cihp->immediate_data; 1495 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1496 cs->cs_conn->ic_header_crc32c = true; 1497 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1498 cs->cs_conn->ic_data_crc32c = true; 1499 1500 strlcpy(cs->cs_initiator_name, 1501 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1502 strlcpy(cs->cs_initiator_addr, 1503 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1504 strlcpy(cs->cs_initiator_alias, 1505 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1506 1507#ifdef ICL_KERNEL_PROXY 1508 if (cihp->socket > 0) { 1509#endif 1510 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1511 if (error != 0) { 1512 cfiscsi_session_delete(cs); 1513 ci->status = CTL_ISCSI_ERROR; 1514 snprintf(ci->error_str, sizeof(ci->error_str), 1515 "%s: icl_conn_handoff failed with error %d", 1516 __func__, error); 1517 return; 1518 } 1519#ifdef ICL_KERNEL_PROXY 1520 } 1521#endif 1522 1523 /* 1524 * Register initiator with CTL. 1525 */ 1526 cfiscsi_session_register_initiator(cs); 1527 1528#ifdef ICL_KERNEL_PROXY 1529 cs->cs_login_phase = false; 1530 1531 /* 1532 * First PDU of the Full Feature phase has likely already arrived. 1533 * We have to pick it up and execute properly. 1534 */ 1535 if (cs->cs_login_pdu != NULL) { 1536 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1537 cfiscsi_pdu_handle(cs->cs_login_pdu); 1538 cs->cs_login_pdu = NULL; 1539 } 1540#endif 1541 1542 ci->status = CTL_ISCSI_OK; 1543} 1544 1545static void 1546cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1547{ 1548 struct ctl_iscsi_list_params *cilp; 1549 struct cfiscsi_session *cs; 1550 struct cfiscsi_softc *softc; 1551 struct sbuf *sb; 1552 int error; 1553 1554 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1555 softc = &cfiscsi_softc; 1556 1557 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1558 if (sb == NULL) { 1559 ci->status = CTL_ISCSI_ERROR; 1560 snprintf(ci->error_str, sizeof(ci->error_str), 1561 "Unable to allocate %d bytes for iSCSI session list", 1562 cilp->alloc_len); 1563 return; 1564 } 1565 1566 sbuf_printf(sb, "<ctlislist>\n"); 1567 mtx_lock(&softc->lock); 1568 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1569#ifdef ICL_KERNEL_PROXY 1570 if (cs->cs_target == NULL) 1571 continue; 1572#endif 1573 error = sbuf_printf(sb, "<connection id=\"%d\">" 1574 "<initiator>%s</initiator>" 1575 "<initiator_addr>%s</initiator_addr>" 1576 "<initiator_alias>%s</initiator_alias>" 1577 "<target>%s</target>" 1578 "<target_alias>%s</target_alias>" 1579 "<header_digest>%s</header_digest>" 1580 "<data_digest>%s</data_digest>" 1581 "<max_data_segment_length>%zd</max_data_segment_length>" 1582 "<immediate_data>%d</immediate_data>" 1583 "<iser>%d</iser>" 1584 "</connection>\n", 1585 cs->cs_id, 1586 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1587 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1588 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1589 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1590 cs->cs_max_data_segment_length, 1591 cs->cs_immediate_data, 1592 cs->cs_conn->ic_iser); 1593 if (error != 0) 1594 break; 1595 } 1596 mtx_unlock(&softc->lock); 1597 error = sbuf_printf(sb, "</ctlislist>\n"); 1598 if (error != 0) { 1599 sbuf_delete(sb); 1600 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1601 snprintf(ci->error_str, sizeof(ci->error_str), 1602 "Out of space, %d bytes is too small", cilp->alloc_len); 1603 return; 1604 } 1605 sbuf_finish(sb); 1606 1607 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1608 cilp->fill_len = sbuf_len(sb) + 1; 1609 ci->status = CTL_ISCSI_OK; 1610 sbuf_delete(sb); 1611} 1612 1613static void 1614cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1615{ 1616 struct icl_pdu *response; 1617 struct iscsi_bhs_asynchronous_message *bhsam; 1618 struct ctl_iscsi_terminate_params *citp; 1619 struct cfiscsi_session *cs; 1620 struct cfiscsi_softc *softc; 1621 int found = 0; 1622 1623 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1624 softc = &cfiscsi_softc; 1625 1626 mtx_lock(&softc->lock); 1627 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1628 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1629 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1630 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1631 continue; 1632 1633 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1634 if (response == NULL) { 1635 /* 1636 * Oh well. Just terminate the connection. 1637 */ 1638 } else { 1639 bhsam = (struct iscsi_bhs_asynchronous_message *) 1640 response->ip_bhs; 1641 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1642 bhsam->bhsam_flags = 0x80; 1643 bhsam->bhsam_0xffffffff = 0xffffffff; 1644 bhsam->bhsam_async_event = 1645 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1646 cfiscsi_pdu_queue(response); 1647 } 1648 cfiscsi_session_terminate(cs); 1649 found++; 1650 } 1651 mtx_unlock(&softc->lock); 1652 1653 if (found == 0) { 1654 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1655 snprintf(ci->error_str, sizeof(ci->error_str), 1656 "No matching connections found"); 1657 return; 1658 } 1659 1660 ci->status = CTL_ISCSI_OK; 1661} 1662 1663static void 1664cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1665{ 1666 struct icl_pdu *response; 1667 struct iscsi_bhs_asynchronous_message *bhsam; 1668 struct ctl_iscsi_logout_params *cilp; 1669 struct cfiscsi_session *cs; 1670 struct cfiscsi_softc *softc; 1671 int found = 0; 1672 1673 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1674 softc = &cfiscsi_softc; 1675 1676 mtx_lock(&softc->lock); 1677 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1678 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1679 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1680 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1681 continue; 1682 1683 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1684 if (response == NULL) { 1685 ci->status = CTL_ISCSI_ERROR; 1686 snprintf(ci->error_str, sizeof(ci->error_str), 1687 "Unable to allocate memory"); 1688 mtx_unlock(&softc->lock); 1689 return; 1690 } 1691 bhsam = 1692 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1693 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1694 bhsam->bhsam_flags = 0x80; 1695 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1696 bhsam->bhsam_parameter3 = htons(10); 1697 cfiscsi_pdu_queue(response); 1698 found++; 1699 } 1700 mtx_unlock(&softc->lock); 1701 1702 if (found == 0) { 1703 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1704 snprintf(ci->error_str, sizeof(ci->error_str), 1705 "No matching connections found"); 1706 return; 1707 } 1708 1709 ci->status = CTL_ISCSI_OK; 1710} 1711 1712#ifdef ICL_KERNEL_PROXY 1713static void 1714cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1715{ 1716 struct ctl_iscsi_listen_params *cilp; 1717 struct sockaddr *sa; 1718 int error; 1719 1720 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1721 1722 if (cfiscsi_softc.listener == NULL) { 1723 CFISCSI_DEBUG("no listener"); 1724 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1725 ci->status = CTL_ISCSI_ERROR; 1726 return; 1727 } 1728 1729 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1730 if (error != 0) { 1731 CFISCSI_DEBUG("getsockaddr, error %d", error); 1732 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1733 ci->status = CTL_ISCSI_ERROR; 1734 return; 1735 } 1736 1737 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1738 cilp->socktype, cilp->protocol, sa); 1739 if (error != 0) { 1740 free(sa, M_SONAME); 1741 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1742 snprintf(ci->error_str, sizeof(ci->error_str), 1743 "icl_listen_add failed, error %d", error); 1744 ci->status = CTL_ISCSI_ERROR; 1745 return; 1746 } 1747 1748 ci->status = CTL_ISCSI_OK; 1749} 1750 1751static void 1752cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1753{ 1754 struct ctl_iscsi_accept_params *ciap; 1755 struct cfiscsi_session *cs; 1756 int error; 1757 1758 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1759 1760 mtx_lock(&cfiscsi_softc.lock); 1761 for (;;) { 1762 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1763 if (cs->cs_waiting_for_ctld) 1764 break; 1765 } 1766 if (cs != NULL) 1767 break; 1768 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1769 if (error != 0) { 1770 mtx_unlock(&cfiscsi_softc.lock); 1771 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1772 ci->status = CTL_ISCSI_ERROR; 1773 return; 1774 } 1775 } 1776 mtx_unlock(&cfiscsi_softc.lock); 1777 1778 cs->cs_waiting_for_ctld = false; 1779 cs->cs_login_phase = true; 1780 1781 ciap->connection_id = cs->cs_id; 1782 ci->status = CTL_ISCSI_OK; 1783} 1784 1785static void 1786cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1787{ 1788 struct ctl_iscsi_send_params *cisp; 1789 struct cfiscsi_session *cs; 1790 struct icl_pdu *ip; 1791 size_t datalen; 1792 void *data; 1793 int error; 1794 1795 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1796 1797 mtx_lock(&cfiscsi_softc.lock); 1798 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1799 if (cs->cs_id == cisp->connection_id) 1800 break; 1801 } 1802 if (cs == NULL) { 1803 mtx_unlock(&cfiscsi_softc.lock); 1804 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1805 ci->status = CTL_ISCSI_ERROR; 1806 return; 1807 } 1808 mtx_unlock(&cfiscsi_softc.lock); 1809 1810#if 0 1811 if (cs->cs_login_phase == false) 1812 return (EBUSY); 1813#endif 1814 1815 if (cs->cs_terminating) { 1816 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1817 ci->status = CTL_ISCSI_ERROR; 1818 return; 1819 } 1820 1821 datalen = cisp->data_segment_len; 1822 /* 1823 * XXX 1824 */ 1825 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1826 if (datalen > 65535) { 1827 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1828 ci->status = CTL_ISCSI_ERROR; 1829 return; 1830 } 1831 if (datalen > 0) { 1832 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1833 error = copyin(cisp->data_segment, data, datalen); 1834 if (error != 0) { 1835 free(data, M_CFISCSI); 1836 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1837 ci->status = CTL_ISCSI_ERROR; 1838 return; 1839 } 1840 } 1841 1842 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1843 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1844 if (datalen > 0) { 1845 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1846 free(data, M_CFISCSI); 1847 } 1848 CFISCSI_SESSION_LOCK(cs); 1849 icl_pdu_queue(ip); 1850 CFISCSI_SESSION_UNLOCK(cs); 1851 ci->status = CTL_ISCSI_OK; 1852} 1853 1854static void 1855cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1856{ 1857 struct ctl_iscsi_receive_params *cirp; 1858 struct cfiscsi_session *cs; 1859 struct icl_pdu *ip; 1860 void *data; 1861 1862 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1863 1864 mtx_lock(&cfiscsi_softc.lock); 1865 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1866 if (cs->cs_id == cirp->connection_id) 1867 break; 1868 } 1869 if (cs == NULL) { 1870 mtx_unlock(&cfiscsi_softc.lock); 1871 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1872 ci->status = CTL_ISCSI_ERROR; 1873 return; 1874 } 1875 mtx_unlock(&cfiscsi_softc.lock); 1876 1877#if 0 1878 if (is->is_login_phase == false) 1879 return (EBUSY); 1880#endif 1881 1882 CFISCSI_SESSION_LOCK(cs); 1883 while (cs->cs_login_pdu == NULL && 1884 cs->cs_terminating == false) 1885 cv_wait(&cs->cs_login_cv, &cs->cs_lock); 1886 if (cs->cs_terminating) { 1887 CFISCSI_SESSION_UNLOCK(cs); 1888 snprintf(ci->error_str, sizeof(ci->error_str), "connection terminating"); 1889 ci->status = CTL_ISCSI_ERROR; 1890 return; 1891 } 1892 ip = cs->cs_login_pdu; 1893 cs->cs_login_pdu = NULL; 1894 CFISCSI_SESSION_UNLOCK(cs); 1895 1896 if (ip->ip_data_len > cirp->data_segment_len) { 1897 icl_pdu_free(ip); 1898 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1899 ci->status = CTL_ISCSI_ERROR; 1900 return; 1901 } 1902 1903 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1904 if (ip->ip_data_len > 0) { 1905 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1906 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1907 copyout(data, cirp->data_segment, ip->ip_data_len); 1908 free(data, M_CFISCSI); 1909 } 1910 1911 icl_pdu_free(ip); 1912 ci->status = CTL_ISCSI_OK; 1913} 1914 1915static void 1916cfiscsi_ioctl_close(struct ctl_iscsi *ci) 1917{ 1918 /* 1919 * XXX 1920 */ 1921} 1922#endif /* !ICL_KERNEL_PROXY */ 1923 1924static int 1925cfiscsi_ioctl(struct cdev *dev, 1926 u_long cmd, caddr_t addr, int flag, struct thread *td) 1927{ 1928 struct ctl_iscsi *ci; 1929 1930 if (cmd != CTL_ISCSI) 1931 return (ENOTTY); 1932 1933 ci = (struct ctl_iscsi *)addr; 1934 switch (ci->type) { 1935 case CTL_ISCSI_HANDOFF: 1936 cfiscsi_ioctl_handoff(ci); 1937 break; 1938 case CTL_ISCSI_LIST: 1939 cfiscsi_ioctl_list(ci); 1940 break; 1941 case CTL_ISCSI_TERMINATE: 1942 cfiscsi_ioctl_terminate(ci); 1943 break; 1944 case CTL_ISCSI_LOGOUT: 1945 cfiscsi_ioctl_logout(ci); 1946 break; 1947#ifdef ICL_KERNEL_PROXY 1948 case CTL_ISCSI_LISTEN: 1949 cfiscsi_ioctl_listen(ci); 1950 break; 1951 case CTL_ISCSI_ACCEPT: 1952 cfiscsi_ioctl_accept(ci); 1953 break; 1954 case CTL_ISCSI_SEND: 1955 cfiscsi_ioctl_send(ci); 1956 break; 1957 case CTL_ISCSI_RECEIVE: 1958 cfiscsi_ioctl_receive(ci); 1959 break; 1960 case CTL_ISCSI_CLOSE: 1961 cfiscsi_ioctl_close(ci); 1962 break; 1963#endif /* ICL_KERNEL_PROXY */ 1964 default: 1965 ci->status = CTL_ISCSI_ERROR; 1966 snprintf(ci->error_str, sizeof(ci->error_str), 1967 "%s: invalid iSCSI request type %d", __func__, ci->type); 1968 break; 1969 } 1970 1971 return (0); 1972} 1973 1974static int 1975cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 1976{ 1977 struct cfiscsi_session *cs; 1978 struct scsi_vpd_device_id *devid_ptr; 1979 struct scsi_vpd_id_descriptor *desc, *desc1; 1980 struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */ 1981 struct scsi_vpd_id_t10 *t10id; 1982 struct ctl_lun *lun; 1983 const struct icl_pdu *request; 1984 size_t devid_len, wwpn_len; 1985 1986 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 1987 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 1988 cs = PDU_SESSION(request); 1989 1990 wwpn_len = strlen(cs->cs_target->ct_name); 1991 wwpn_len += strlen(",t,0x01"); 1992 wwpn_len += 1; /* '\0' */ 1993 if ((wwpn_len % 4) != 0) 1994 wwpn_len += (4 - (wwpn_len % 4)); 1995 1996 devid_len = sizeof(struct scsi_vpd_device_id) + 1997 sizeof(struct scsi_vpd_id_descriptor) + 1998 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 1999 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 2000 sizeof(struct scsi_vpd_id_descriptor) + 2001 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 2002 sizeof(struct scsi_vpd_id_descriptor) + 2003 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 2004 2005 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 2006 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 2007 ctsio->kern_sg_entries = 0; 2008 2009 if (devid_len < alloc_len) { 2010 ctsio->residual = alloc_len - devid_len; 2011 ctsio->kern_data_len = devid_len; 2012 ctsio->kern_total_len = devid_len; 2013 } else { 2014 ctsio->residual = 0; 2015 ctsio->kern_data_len = alloc_len; 2016 ctsio->kern_total_len = alloc_len; 2017 } 2018 ctsio->kern_data_resid = 0; 2019 ctsio->kern_rel_offset = 0; 2020 ctsio->kern_sg_entries = 0; 2021 2022 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2023 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2024 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2025 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 2026 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2027 wwpn_len); 2028 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2029 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2030 2031 if (lun != NULL) 2032 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2033 lun->be_lun->lun_type; 2034 else 2035 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2036 2037 devid_ptr->page_code = SVPD_DEVICE_ID; 2038 2039 scsi_ulto2b(devid_len - 4, devid_ptr->length); 2040 2041 /* 2042 * We're using a LUN association here. i.e., this device ID is a 2043 * per-LUN identifier. 2044 */ 2045 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2046 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2047 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 2048 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2049 2050 /* 2051 * If we've actually got a backend, copy the device id from the 2052 * per-LUN data. Otherwise, set it to all spaces. 2053 */ 2054 if (lun != NULL) { 2055 /* 2056 * Copy the backend's LUN ID. 2057 */ 2058 strncpy((char *)t10id->vendor_spec_id, 2059 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2060 } else { 2061 /* 2062 * No backend, set this to spaces. 2063 */ 2064 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2065 } 2066 2067 /* 2068 * desc1 is for the WWPN which is a port asscociation. 2069 */ 2070 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2071 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2072 SVPD_ID_TYPE_SCSI_NAME; 2073 desc1->length = wwpn_len; 2074 snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x", 2075 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2076 2077 /* 2078 * desc2 is for the Relative Target Port(type 4h) identifier 2079 */ 2080 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2081 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2082 SVPD_ID_TYPE_RELTARG; 2083 desc2->length = 4; 2084 desc2->identifier[3] = 1; 2085 2086 /* 2087 * desc3 is for the Target Port Group(type 5h) identifier 2088 */ 2089 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2090 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2091 SVPD_ID_TYPE_TPORTGRP; 2092 desc3->length = 4; 2093 desc3->identifier[3] = 1; 2094 2095 ctsio->scsi_status = SCSI_STATUS_OK; 2096 2097 ctsio->be_move_done = ctl_config_move_done; 2098 ctl_datamove((union ctl_io *)ctsio); 2099 2100 return (CTL_RETVAL_COMPLETE); 2101} 2102 2103static void 2104cfiscsi_target_hold(struct cfiscsi_target *ct) 2105{ 2106 2107 refcount_acquire(&ct->ct_refcount); 2108} 2109 2110static void 2111cfiscsi_target_release(struct cfiscsi_target *ct) 2112{ 2113 struct cfiscsi_softc *softc; 2114 2115 softc = ct->ct_softc; 2116 mtx_lock(&softc->lock); 2117 if (refcount_release(&ct->ct_refcount)) { 2118 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2119 mtx_unlock(&softc->lock); 2120 free(ct, M_CFISCSI); 2121 2122 return; 2123 } 2124 mtx_unlock(&softc->lock); 2125} 2126 2127static struct cfiscsi_target * 2128cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2129{ 2130 struct cfiscsi_target *ct; 2131 2132 mtx_lock(&softc->lock); 2133 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2134 if (strcmp(name, ct->ct_name) != 0) 2135 continue; 2136 cfiscsi_target_hold(ct); 2137 mtx_unlock(&softc->lock); 2138 return (ct); 2139 } 2140 mtx_unlock(&softc->lock); 2141 2142 return (NULL); 2143} 2144 2145static struct cfiscsi_target * 2146cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2147 const char *alias) 2148{ 2149 struct cfiscsi_target *ct, *newct; 2150 int i; 2151 2152 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2153 return (NULL); 2154 2155 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2156 2157 mtx_lock(&softc->lock); 2158 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2159 if (strcmp(name, ct->ct_name) != 0) 2160 continue; 2161 cfiscsi_target_hold(ct); 2162 mtx_unlock(&softc->lock); 2163 free(newct, M_CFISCSI); 2164 return (ct); 2165 } 2166 2167 for (i = 0; i < CTL_MAX_LUNS; i++) 2168 newct->ct_luns[i] = -1; 2169 2170 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2171 if (alias != NULL) 2172 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2173 refcount_init(&newct->ct_refcount, 1); 2174 newct->ct_softc = softc; 2175 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2176 mtx_unlock(&softc->lock); 2177 2178 return (newct); 2179} 2180 2181/* 2182 * Takes LUN from the target space and returns LUN from the CTL space. 2183 */ 2184static uint32_t 2185cfiscsi_map_lun(void *arg, uint32_t lun) 2186{ 2187 struct cfiscsi_session *cs; 2188 2189 cs = arg; 2190 2191 if (lun >= CTL_MAX_LUNS) { 2192 CFISCSI_DEBUG("requested lun number %d is higher " 2193 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2194 return (0xffffffff); 2195 } 2196 2197 if (cs->cs_target->ct_luns[lun] < 0) 2198 return (0xffffffff); 2199 2200 return (cs->cs_target->ct_luns[lun]); 2201} 2202 2203static int 2204cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2205 unsigned long lun_id, unsigned long ctl_lun_id) 2206{ 2207 2208 if (lun_id >= CTL_MAX_LUNS) { 2209 CFISCSI_WARN("requested lun number %ld is higher " 2210 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2211 return (-1); 2212 } 2213 2214 if (ct->ct_luns[lun_id] >= 0) { 2215 /* 2216 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2217 * when the LUN is created, and a second time just before 2218 * the port is brought online; don't emit warnings 2219 * for that case. 2220 */ 2221 if (ct->ct_luns[lun_id] == ctl_lun_id) 2222 return (0); 2223 CFISCSI_WARN("lun %ld already allocated", lun_id); 2224 return (-1); 2225 } 2226 2227#if 0 2228 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2229 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2230#endif 2231 2232 ct->ct_luns[lun_id] = ctl_lun_id; 2233 cfiscsi_target_hold(ct); 2234 2235 return (0); 2236} 2237 2238static int 2239cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2240{ 2241 2242 if (ct->ct_luns[lun_id] < 0) { 2243 CFISCSI_WARN("lun %ld not allocated", lun_id); 2244 return (-1); 2245 } 2246 2247 ct->ct_luns[lun_id] = -1; 2248 cfiscsi_target_release(ct); 2249 2250 return (0); 2251} 2252 2253static int 2254cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2255{ 2256 struct cfiscsi_softc *softc; 2257 struct cfiscsi_target *ct; 2258 struct ctl_be_lun_option *opt; 2259 const char *target = NULL, *target_alias = NULL; 2260 const char *lun = NULL; 2261 unsigned long tmp; 2262 2263 softc = (struct cfiscsi_softc *)arg; 2264 2265 STAILQ_FOREACH(opt, 2266 &control_softc->ctl_luns[lun_id]->be_lun->options, links) { 2267 if (strcmp(opt->name, "cfiscsi_target") == 0) 2268 target = opt->value; 2269 else if (strcmp(opt->name, "cfiscsi_target_alias") == 0) 2270 target_alias = opt->value; 2271 else if (strcmp(opt->name, "cfiscsi_lun") == 0) 2272 lun = opt->value; 2273 } 2274 2275 if (target == NULL && lun == NULL) 2276 return (0); 2277 2278 if (target == NULL || lun == NULL) { 2279 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2280 "cfiscsi_lun, or the other way around; ignoring"); 2281 return (0); 2282 } 2283 2284 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2285 if (ct == NULL) { 2286 CFISCSI_WARN("failed to create target \"%s\"", target); 2287 return (0); 2288 } 2289 2290 tmp = strtoul(lun, NULL, 10); 2291 cfiscsi_target_set_lun(ct, tmp, lun_id); 2292 cfiscsi_target_release(ct); 2293 return (0); 2294} 2295 2296static int 2297cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2298{ 2299 struct cfiscsi_softc *softc; 2300 struct cfiscsi_target *ct; 2301 int i; 2302 2303 softc = (struct cfiscsi_softc *)arg; 2304 2305 mtx_lock(&softc->lock); 2306 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2307 for (i = 0; i < CTL_MAX_LUNS; i++) { 2308 if (ct->ct_luns[i] < 0) 2309 continue; 2310 if (ct->ct_luns[i] != lun_id) 2311 continue; 2312 mtx_unlock(&softc->lock); 2313 cfiscsi_target_unset_lun(ct, i); 2314 return (0); 2315 } 2316 } 2317 mtx_unlock(&softc->lock); 2318 return (0); 2319} 2320 2321static void 2322cfiscsi_datamove_in(union ctl_io *io) 2323{ 2324 struct cfiscsi_session *cs; 2325 struct icl_pdu *request, *response; 2326 const struct iscsi_bhs_scsi_command *bhssc; 2327 struct iscsi_bhs_data_in *bhsdi; 2328 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2329 size_t len, expected_len, sg_len, buffer_offset; 2330 const char *sg_addr; 2331 int ctl_sg_count, error, i; 2332 2333 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2334 cs = PDU_SESSION(request); 2335 2336 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2337 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2338 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2339 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2340 2341 if (io->scsiio.kern_sg_entries > 0) { 2342 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2343 ctl_sg_count = io->scsiio.kern_sg_entries; 2344 } else { 2345 ctl_sglist = &ctl_sg_entry; 2346 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2347 ctl_sglist->len = io->scsiio.kern_data_len; 2348 ctl_sg_count = 1; 2349 } 2350 2351 /* 2352 * This is the total amount of data to be transferred within the current 2353 * SCSI command. We need to record it so that we can properly report 2354 * underflow/underflow. 2355 */ 2356 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2357 2358 /* 2359 * This is the offset within the current SCSI command; for the first 2360 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2361 * it will be the sum of lengths of previous ones. It's being 2362 * incremented as we append data to the data segment. 2363 */ 2364 buffer_offset = io->scsiio.kern_rel_offset; 2365 2366 /* 2367 * This is the transfer length expected by the initiator. In theory, 2368 * it could be different from the correct amount of data from the SCSI 2369 * point of view, even if that doesn't make any sense. 2370 */ 2371 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2372#if 0 2373 if (expected_len != io->scsiio.kern_total_len) 2374 CFISCSI_SESSION_DEBUG(cs, "expected transfer length = %zd, " 2375 "actual length = %zd", expected_len, 2376 io->scsiio.kern_total_len); 2377#endif 2378 2379 if (buffer_offset >= expected_len) { 2380#if 0 2381 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2382 "already sent the expected len", buffer_offset); 2383#endif 2384 io->scsiio.ext_data_filled = io->scsiio.kern_total_len; 2385 io->scsiio.be_move_done(io); 2386 return; 2387 } 2388 2389 i = 0; 2390 sg_addr = NULL; 2391 sg_len = 0; 2392 response = NULL; 2393 bhsdi = NULL; 2394 for (;;) { 2395 if (response == NULL) { 2396 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2397 if (response == NULL) { 2398 CFISCSI_SESSION_WARN(cs, "failed to " 2399 "allocate memory; dropping connection"); 2400 ctl_set_busy(&io->scsiio); 2401 io->scsiio.be_move_done(io); 2402 cfiscsi_session_terminate(cs); 2403 return; 2404 } 2405 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2406 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2407 bhsdi->bhsdi_initiator_task_tag = 2408 bhssc->bhssc_initiator_task_tag; 2409 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2410 PDU_EXPDATASN(request)++; 2411 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2412 } 2413 2414 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2415 if (sg_len == 0) { 2416 sg_addr = ctl_sglist[i].addr; 2417 sg_len = ctl_sglist[i].len; 2418 KASSERT(sg_len > 0, ("sg_len <= 0")); 2419 } 2420 2421 len = sg_len; 2422 2423 /* 2424 * Truncate to maximum data segment length. 2425 */ 2426 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2427 ("max_data_segment_length %zd >= ip_data_len %zd", 2428 response->ip_data_len, cs->cs_max_data_segment_length)); 2429 if (response->ip_data_len + len > 2430 cs->cs_max_data_segment_length) 2431 len = cs->cs_max_data_segment_length - 2432 response->ip_data_len; 2433 2434 /* 2435 * Truncate to expected data transfer length. 2436 */ 2437 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2438 ("%zd >= %zd", buffer_offset + response->ip_data_len, expected_len)); 2439 if (buffer_offset + response->ip_data_len + len > expected_len) { 2440 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2441 "to expected data transfer length %zd", 2442 buffer_offset + response->ip_data_len + len, expected_len); 2443 len = expected_len - (buffer_offset + response->ip_data_len); 2444 } 2445 2446 KASSERT(len <= sg_len, ("len > sg_len")); 2447 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2448 if (error != 0) { 2449 CFISCSI_SESSION_WARN(cs, "failed to " 2450 "allocate memory; dropping connection"); 2451 icl_pdu_free(response); 2452 ctl_set_busy(&io->scsiio); 2453 io->scsiio.be_move_done(io); 2454 cfiscsi_session_terminate(cs); 2455 return; 2456 } 2457 sg_addr += len; 2458 sg_len -= len; 2459 buffer_offset += len; 2460 io->scsiio.ext_data_filled += len; 2461 2462 if (buffer_offset == expected_len) { 2463 /* 2464 * Already have the amount of data the initiator wanted. 2465 */ 2466 break; 2467 } 2468 2469 if (sg_len == 0) { 2470 /* 2471 * End of scatter-gather segment; 2472 * proceed to the next one... 2473 */ 2474 if (i == ctl_sg_count - 1) { 2475 /* 2476 * ... unless this was the last one. 2477 */ 2478 break; 2479 } 2480 i++; 2481 } 2482 2483 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2484 /* 2485 * Can't stuff more data into the current PDU; 2486 * queue it. Note that's not enough to check 2487 * for kern_data_resid == 0 instead; there 2488 * may be several Data-In PDUs for the final 2489 * call to cfiscsi_datamove(), and we want 2490 * to set the F flag only on the last of them. 2491 */ 2492 if (buffer_offset == io->scsiio.kern_total_len || 2493 buffer_offset == expected_len) 2494 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2495 cfiscsi_pdu_queue(response); 2496 response = NULL; 2497 bhsdi = NULL; 2498 } 2499 } 2500 if (response != NULL) { 2501 if (buffer_offset == io->scsiio.kern_total_len || 2502 buffer_offset == expected_len) 2503 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2504 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2505 cfiscsi_pdu_queue(response); 2506 } 2507 2508 io->scsiio.be_move_done(io); 2509} 2510 2511static void 2512cfiscsi_datamove_out(union ctl_io *io) 2513{ 2514 struct cfiscsi_session *cs; 2515 struct icl_pdu *request, *response; 2516 const struct iscsi_bhs_scsi_command *bhssc; 2517 struct iscsi_bhs_r2t *bhsr2t; 2518 struct cfiscsi_data_wait *cdw; 2519 uint32_t target_transfer_tag; 2520 bool done; 2521 2522 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2523 cs = PDU_SESSION(request); 2524 2525 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2526 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2527 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2528 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2529 2530 /* 2531 * We need to record it so that we can properly report 2532 * underflow/underflow. 2533 */ 2534 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2535 2536 target_transfer_tag = 2537 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2538 2539#if 0 2540 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2541 "task tag 0x%x, target transfer tag 0x%x", 2542 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2543#endif 2544 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2545 if (cdw == NULL) { 2546 CFISCSI_SESSION_WARN(cs, "failed to " 2547 "allocate memory; dropping connection"); 2548 ctl_set_busy(&io->scsiio); 2549 io->scsiio.be_move_done(io); 2550 cfiscsi_session_terminate(cs); 2551 return; 2552 } 2553 cdw->cdw_ctl_io = io; 2554 cdw->cdw_target_transfer_tag = target_transfer_tag; 2555 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2556 2557 if (cs->cs_immediate_data && icl_pdu_data_segment_length(request) > 0) { 2558 done = cfiscsi_handle_data_segment(request, cdw); 2559 if (done) { 2560 uma_zfree(cfiscsi_data_wait_zone, cdw); 2561 io->scsiio.be_move_done(io); 2562 return; 2563 } 2564 2565#if 0 2566 if (io->scsiio.ext_data_filled != 0) 2567 CFISCSI_SESSION_DEBUG(cs, "got %zd bytes of immediate data, need %zd", 2568 io->scsiio.ext_data_filled, io->scsiio.kern_data_len); 2569#endif 2570 } 2571 2572 CFISCSI_SESSION_LOCK(cs); 2573 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2574 CFISCSI_SESSION_UNLOCK(cs); 2575 2576 /* 2577 * XXX: We should limit the number of outstanding R2T PDUs 2578 * per task to MaxOutstandingR2T. 2579 */ 2580 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2581 if (response == NULL) { 2582 CFISCSI_SESSION_WARN(cs, "failed to " 2583 "allocate memory; dropping connection"); 2584 ctl_set_busy(&io->scsiio); 2585 io->scsiio.be_move_done(io); 2586 cfiscsi_session_terminate(cs); 2587 return; 2588 } 2589 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2590 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2591 bhsr2t->bhsr2t_flags = 0x80; 2592 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2593 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2594 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2595 /* 2596 * XXX: Here we assume that cfiscsi_datamove() won't ever 2597 * be running concurrently on several CPUs for a given 2598 * command. 2599 */ 2600 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2601 PDU_R2TSN(request)++; 2602 /* 2603 * This is the offset within the current SCSI command; 2604 * i.e. for the first call of datamove(), it will be 0, 2605 * and for subsequent ones it will be the sum of lengths 2606 * of previous ones. 2607 * 2608 * The ext_data_filled is to account for unsolicited 2609 * (immediate) data that might have already arrived. 2610 */ 2611 bhsr2t->bhsr2t_buffer_offset = 2612 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2613 /* 2614 * This is the total length (sum of S/G lengths) this call 2615 * to cfiscsi_datamove() is supposed to handle. 2616 * 2617 * XXX: Limit it to MaxBurstLength. 2618 */ 2619 bhsr2t->bhsr2t_desired_data_transfer_length = 2620 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2621 cfiscsi_pdu_queue(response); 2622} 2623 2624static void 2625cfiscsi_datamove(union ctl_io *io) 2626{ 2627 2628 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2629 cfiscsi_datamove_in(io); 2630 else 2631 cfiscsi_datamove_out(io); 2632} 2633 2634static void 2635cfiscsi_scsi_command_done(union ctl_io *io) 2636{ 2637 struct icl_pdu *request, *response; 2638 struct iscsi_bhs_scsi_command *bhssc; 2639 struct iscsi_bhs_scsi_response *bhssr; 2640#ifdef DIAGNOSTIC 2641 struct cfiscsi_data_wait *cdw; 2642#endif 2643 struct cfiscsi_session *cs; 2644 uint16_t sense_length; 2645 2646 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2647 cs = PDU_SESSION(request); 2648 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2649 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2650 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2651 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2652 2653 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2654 // bhssc->bhssc_initiator_task_tag); 2655 2656#ifdef DIAGNOSTIC 2657 CFISCSI_SESSION_LOCK(cs); 2658 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2659 KASSERT(bhssc->bhssc_initiator_task_tag != 2660 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2661 CFISCSI_SESSION_UNLOCK(cs); 2662#endif 2663 2664 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2665 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2666 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2667 bhssr->bhssr_flags = 0x80; 2668 /* 2669 * XXX: We don't deal with bidirectional under/overflows; 2670 * does anything actually support those? 2671 */ 2672 if (PDU_TOTAL_TRANSFER_LEN(request) < 2673 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2674 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2675 bhssr->bhssr_residual_count = 2676 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2677 PDU_TOTAL_TRANSFER_LEN(request)); 2678 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2679 // ntohl(bhssr->bhssr_residual_count)); 2680 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2681 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2682 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2683 bhssr->bhssr_residual_count = 2684 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2685 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2686 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2687 // ntohl(bhssr->bhssr_residual_count)); 2688 } 2689 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2690 bhssr->bhssr_status = io->scsiio.scsi_status; 2691 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2692 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2693 2694 if (io->scsiio.sense_len > 0) { 2695#if 0 2696 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2697 io->scsiio.sense_len); 2698#endif 2699 sense_length = htons(io->scsiio.sense_len); 2700 icl_pdu_append_data(response, 2701 &sense_length, sizeof(sense_length), M_WAITOK); 2702 icl_pdu_append_data(response, 2703 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2704 } 2705 2706 ctl_free_io(io); 2707 icl_pdu_free(request); 2708 cfiscsi_pdu_queue(response); 2709} 2710 2711static void 2712cfiscsi_task_management_done(union ctl_io *io) 2713{ 2714 struct icl_pdu *request, *response; 2715 struct iscsi_bhs_task_management_request *bhstmr; 2716 struct iscsi_bhs_task_management_response *bhstmr2; 2717 struct cfiscsi_data_wait *cdw, *tmpcdw; 2718 struct cfiscsi_session *cs; 2719 2720 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2721 cs = PDU_SESSION(request); 2722 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2723 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2724 ISCSI_BHS_OPCODE_TASK_REQUEST, 2725 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2726 2727#if 0 2728 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2729 bhstmr->bhstmr_initiator_task_tag, 2730 bhstmr->bhstmr_referenced_task_tag); 2731#endif 2732 2733 if ((bhstmr->bhstmr_function & ~0x80) == 2734 BHSTMR_FUNCTION_ABORT_TASK) { 2735 /* 2736 * Make sure we no longer wait for Data-Out for this command. 2737 */ 2738 CFISCSI_SESSION_LOCK(cs); 2739 TAILQ_FOREACH_SAFE(cdw, 2740 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2741 if (bhstmr->bhstmr_referenced_task_tag != 2742 cdw->cdw_initiator_task_tag) 2743 continue; 2744 2745#if 0 2746 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2747 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2748#endif 2749 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2750 cdw, cdw_next); 2751 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2752 uma_zfree(cfiscsi_data_wait_zone, cdw); 2753 } 2754 CFISCSI_SESSION_UNLOCK(cs); 2755 } 2756 2757 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2758 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2759 response->ip_bhs; 2760 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2761 bhstmr2->bhstmr_flags = 0x80; 2762 if (io->io_hdr.status == CTL_SUCCESS) { 2763 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2764 } else { 2765 /* 2766 * XXX: How to figure out what exactly went wrong? iSCSI spec 2767 * expects us to provide detailed error, e.g. "Task does 2768 * not exist" or "LUN does not exist". 2769 */ 2770 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2771 bhstmr2->bhstmr_response = 2772 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2773 } 2774 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2775 2776 ctl_free_io(io); 2777 icl_pdu_free(request); 2778 cfiscsi_pdu_queue(response); 2779} 2780 2781static void 2782cfiscsi_done(union ctl_io *io) 2783{ 2784 struct icl_pdu *request; 2785 struct cfiscsi_session *cs; 2786 2787 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2788 ("invalid CTL status %#x", io->io_hdr.status)); 2789 2790 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2791 if (request == NULL) { 2792 /* 2793 * Implicit task termination has just completed; nothing to do. 2794 */ 2795 return; 2796 } 2797 2798 cs = PDU_SESSION(request); 2799 refcount_release(&cs->cs_outstanding_ctl_pdus); 2800 2801 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2802 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2803 cfiscsi_scsi_command_done(io); 2804 break; 2805 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2806 cfiscsi_task_management_done(io); 2807 break; 2808 default: 2809 panic("cfiscsi_done called with wrong opcode 0x%x", 2810 request->ip_bhs->bhs_opcode); 2811 } 2812} 2813