ctl_frontend_iscsi.c revision 264110
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 264110 2014-04-04 08:48:55Z 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 264110 2014-04-04 08:48:55Z 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#ifndef ICL_KERNEL_PROXY 1423 int error; 1424#endif 1425 1426 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1427 softc = &cfiscsi_softc; 1428 1429 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1430 cihp->initiator_name, cihp->initiator_addr, 1431 cihp->target_name); 1432 1433 if (softc->online == 0) { 1434 ci->status = CTL_ISCSI_ERROR; 1435 snprintf(ci->error_str, sizeof(ci->error_str), 1436 "%s: port offline", __func__); 1437 return; 1438 } 1439 1440 ct = cfiscsi_target_find(softc, cihp->target_name); 1441 if (ct == NULL) { 1442 ci->status = CTL_ISCSI_ERROR; 1443 snprintf(ci->error_str, sizeof(ci->error_str), 1444 "%s: target not found", __func__); 1445 return; 1446 } 1447 1448#ifdef ICL_KERNEL_PROXY 1449 mtx_lock(&cfiscsi_softc.lock); 1450 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1451 if (cs->cs_id == cihp->socket) 1452 break; 1453 } 1454 if (cs == NULL) { 1455 mtx_unlock(&cfiscsi_softc.lock); 1456 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1457 ci->status = CTL_ISCSI_ERROR; 1458 return; 1459 } 1460 mtx_unlock(&cfiscsi_softc.lock); 1461#else 1462 cs = cfiscsi_session_new(softc); 1463 if (cs == NULL) { 1464 ci->status = CTL_ISCSI_ERROR; 1465 snprintf(ci->error_str, sizeof(ci->error_str), 1466 "%s: cfiscsi_session_new failed", __func__); 1467 cfiscsi_target_release(ct); 1468 return; 1469 } 1470#endif 1471 cs->cs_target = ct; 1472 1473 /* 1474 * First PDU of Full Feature phase has the same CmdSN as the last 1475 * PDU from the Login Phase received from the initiator. Thus, 1476 * the -1 below. 1477 */ 1478 cs->cs_portal_group_tag = cihp->portal_group_tag; 1479 cs->cs_cmdsn = cihp->cmdsn; 1480 cs->cs_statsn = cihp->statsn; 1481 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1482 cs->cs_max_burst_length = cihp->max_burst_length; 1483 cs->cs_immediate_data = !!cihp->immediate_data; 1484 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1485 cs->cs_conn->ic_header_crc32c = true; 1486 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1487 cs->cs_conn->ic_data_crc32c = true; 1488 1489 strlcpy(cs->cs_initiator_name, 1490 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1491 strlcpy(cs->cs_initiator_addr, 1492 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1493 strlcpy(cs->cs_initiator_alias, 1494 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1495 1496#ifdef ICL_KERNEL_PROXY 1497 cs->cs_login_phase = false; 1498#else 1499 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1500 if (error != 0) { 1501 cfiscsi_session_delete(cs); 1502 ci->status = CTL_ISCSI_ERROR; 1503 snprintf(ci->error_str, sizeof(ci->error_str), 1504 "%s: icl_conn_handoff failed with error %d", 1505 __func__, error); 1506 return; 1507 } 1508#endif 1509 1510 /* 1511 * Register initiator with CTL. 1512 */ 1513 cfiscsi_session_register_initiator(cs); 1514 1515#ifdef ICL_KERNEL_PROXY 1516 /* 1517 * First PDU of the Full Feature phase has likely already arrived. 1518 * We have to pick it up and execute properly. 1519 */ 1520 if (cs->cs_login_pdu != NULL) { 1521 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1522 cfiscsi_pdu_handle(cs->cs_login_pdu); 1523 cs->cs_login_pdu = NULL; 1524 } 1525#endif 1526 1527 ci->status = CTL_ISCSI_OK; 1528} 1529 1530static void 1531cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1532{ 1533 struct ctl_iscsi_list_params *cilp; 1534 struct cfiscsi_session *cs; 1535 struct cfiscsi_softc *softc; 1536 struct sbuf *sb; 1537 int error; 1538 1539 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1540 softc = &cfiscsi_softc; 1541 1542 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1543 if (sb == NULL) { 1544 ci->status = CTL_ISCSI_ERROR; 1545 snprintf(ci->error_str, sizeof(ci->error_str), 1546 "Unable to allocate %d bytes for iSCSI session list", 1547 cilp->alloc_len); 1548 return; 1549 } 1550 1551 sbuf_printf(sb, "<ctlislist>\n"); 1552 mtx_lock(&softc->lock); 1553 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1554#ifdef ICL_KERNEL_PROXY 1555 if (cs->cs_target == NULL) 1556 continue; 1557#endif 1558 error = sbuf_printf(sb, "<connection id=\"%d\">" 1559 "<initiator>%s</initiator>" 1560 "<initiator_addr>%s</initiator_addr>" 1561 "<initiator_alias>%s</initiator_alias>" 1562 "<target>%s</target>" 1563 "<target_alias>%s</target_alias>" 1564 "<header_digest>%s</header_digest>" 1565 "<data_digest>%s</data_digest>" 1566 "<max_data_segment_length>%zd</max_data_segment_length>" 1567 "<immediate_data>%d</immediate_data>" 1568 "<iser>%d</iser>" 1569 "</connection>\n", 1570 cs->cs_id, 1571 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1572 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1573 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1574 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1575 cs->cs_max_data_segment_length, 1576 cs->cs_immediate_data, 1577 cs->cs_conn->ic_iser); 1578 if (error != 0) 1579 break; 1580 } 1581 mtx_unlock(&softc->lock); 1582 error = sbuf_printf(sb, "</ctlislist>\n"); 1583 if (error != 0) { 1584 sbuf_delete(sb); 1585 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1586 snprintf(ci->error_str, sizeof(ci->error_str), 1587 "Out of space, %d bytes is too small", cilp->alloc_len); 1588 return; 1589 } 1590 sbuf_finish(sb); 1591 1592 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1593 cilp->fill_len = sbuf_len(sb) + 1; 1594 ci->status = CTL_ISCSI_OK; 1595 sbuf_delete(sb); 1596} 1597 1598static void 1599cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1600{ 1601 struct icl_pdu *response; 1602 struct iscsi_bhs_asynchronous_message *bhsam; 1603 struct ctl_iscsi_terminate_params *citp; 1604 struct cfiscsi_session *cs; 1605 struct cfiscsi_softc *softc; 1606 int found = 0; 1607 1608 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1609 softc = &cfiscsi_softc; 1610 1611 mtx_lock(&softc->lock); 1612 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1613 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1614 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1615 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1616 continue; 1617 1618 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1619 if (response == NULL) { 1620 /* 1621 * Oh well. Just terminate the connection. 1622 */ 1623 } else { 1624 bhsam = (struct iscsi_bhs_asynchronous_message *) 1625 response->ip_bhs; 1626 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1627 bhsam->bhsam_flags = 0x80; 1628 bhsam->bhsam_0xffffffff = 0xffffffff; 1629 bhsam->bhsam_async_event = 1630 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1631 cfiscsi_pdu_queue(response); 1632 } 1633 cfiscsi_session_terminate(cs); 1634 found++; 1635 } 1636 mtx_unlock(&softc->lock); 1637 1638 if (found == 0) { 1639 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1640 snprintf(ci->error_str, sizeof(ci->error_str), 1641 "No matching connections found"); 1642 return; 1643 } 1644 1645 ci->status = CTL_ISCSI_OK; 1646} 1647 1648static void 1649cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1650{ 1651 struct icl_pdu *response; 1652 struct iscsi_bhs_asynchronous_message *bhsam; 1653 struct ctl_iscsi_logout_params *cilp; 1654 struct cfiscsi_session *cs; 1655 struct cfiscsi_softc *softc; 1656 int found = 0; 1657 1658 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1659 softc = &cfiscsi_softc; 1660 1661 mtx_lock(&softc->lock); 1662 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1663 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1664 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1665 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1666 continue; 1667 1668 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1669 if (response == NULL) { 1670 ci->status = CTL_ISCSI_ERROR; 1671 snprintf(ci->error_str, sizeof(ci->error_str), 1672 "Unable to allocate memory"); 1673 mtx_unlock(&softc->lock); 1674 return; 1675 } 1676 bhsam = 1677 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1678 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1679 bhsam->bhsam_flags = 0x80; 1680 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1681 bhsam->bhsam_parameter3 = htons(10); 1682 cfiscsi_pdu_queue(response); 1683 found++; 1684 } 1685 mtx_unlock(&softc->lock); 1686 1687 if (found == 0) { 1688 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1689 snprintf(ci->error_str, sizeof(ci->error_str), 1690 "No matching connections found"); 1691 return; 1692 } 1693 1694 ci->status = CTL_ISCSI_OK; 1695} 1696 1697#ifdef ICL_KERNEL_PROXY 1698static void 1699cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1700{ 1701 struct ctl_iscsi_listen_params *cilp; 1702 struct sockaddr *sa; 1703 int error; 1704 1705 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1706 1707 if (cfiscsi_softc.listener == NULL) { 1708 CFISCSI_DEBUG("no listener"); 1709 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1710 ci->status = CTL_ISCSI_ERROR; 1711 return; 1712 } 1713 1714 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1715 if (error != 0) { 1716 CFISCSI_DEBUG("getsockaddr, error %d", error); 1717 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1718 ci->status = CTL_ISCSI_ERROR; 1719 return; 1720 } 1721 1722 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1723 cilp->socktype, cilp->protocol, sa); 1724 if (error != 0) { 1725 free(sa, M_SONAME); 1726 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1727 snprintf(ci->error_str, sizeof(ci->error_str), 1728 "icl_listen_add failed, error %d", error); 1729 ci->status = CTL_ISCSI_ERROR; 1730 return; 1731 } 1732 1733 ci->status = CTL_ISCSI_OK; 1734} 1735 1736static void 1737cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1738{ 1739 struct ctl_iscsi_accept_params *ciap; 1740 struct cfiscsi_session *cs; 1741 int error; 1742 1743 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1744 1745 mtx_lock(&cfiscsi_softc.lock); 1746 for (;;) { 1747 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1748 if (cs->cs_waiting_for_ctld) 1749 break; 1750 } 1751 if (cs != NULL) 1752 break; 1753 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1754 if (error != 0) { 1755 mtx_unlock(&cfiscsi_softc.lock); 1756 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1757 ci->status = CTL_ISCSI_ERROR; 1758 return; 1759 } 1760 } 1761 mtx_unlock(&cfiscsi_softc.lock); 1762 1763 cs->cs_waiting_for_ctld = false; 1764 cs->cs_login_phase = true; 1765 1766 ciap->connection_id = cs->cs_id; 1767 ci->status = CTL_ISCSI_OK; 1768} 1769 1770static void 1771cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1772{ 1773 struct ctl_iscsi_send_params *cisp; 1774 struct cfiscsi_session *cs; 1775 struct icl_pdu *ip; 1776 size_t datalen; 1777 void *data; 1778 int error; 1779 1780 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1781 1782 mtx_lock(&cfiscsi_softc.lock); 1783 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1784 if (cs->cs_id == cisp->connection_id) 1785 break; 1786 } 1787 if (cs == NULL) { 1788 mtx_unlock(&cfiscsi_softc.lock); 1789 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1790 ci->status = CTL_ISCSI_ERROR; 1791 return; 1792 } 1793 mtx_unlock(&cfiscsi_softc.lock); 1794 1795#if 0 1796 if (cs->cs_login_phase == false) 1797 return (EBUSY); 1798#endif 1799 1800 if (cs->cs_terminating) { 1801 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1802 ci->status = CTL_ISCSI_ERROR; 1803 return; 1804 } 1805 1806 datalen = cisp->data_segment_len; 1807 /* 1808 * XXX 1809 */ 1810 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1811 if (datalen > 65535) { 1812 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1813 ci->status = CTL_ISCSI_ERROR; 1814 return; 1815 } 1816 if (datalen > 0) { 1817 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1818 error = copyin(cisp->data_segment, data, datalen); 1819 if (error != 0) { 1820 free(data, M_CFISCSI); 1821 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1822 ci->status = CTL_ISCSI_ERROR; 1823 return; 1824 } 1825 } 1826 1827 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1828 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1829 if (datalen > 0) { 1830 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1831 free(data, M_CFISCSI); 1832 } 1833 icl_pdu_queue(ip); 1834 ci->status = CTL_ISCSI_OK; 1835} 1836 1837static void 1838cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1839{ 1840 struct ctl_iscsi_receive_params *cirp; 1841 struct cfiscsi_session *cs; 1842 struct icl_pdu *ip; 1843 void *data; 1844 1845 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1846 1847 mtx_lock(&cfiscsi_softc.lock); 1848 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1849 if (cs->cs_id == cirp->connection_id) 1850 break; 1851 } 1852 if (cs == NULL) { 1853 mtx_unlock(&cfiscsi_softc.lock); 1854 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1855 ci->status = CTL_ISCSI_ERROR; 1856 return; 1857 } 1858 mtx_unlock(&cfiscsi_softc.lock); 1859 1860#if 0 1861 if (is->is_login_phase == false) 1862 return (EBUSY); 1863#endif 1864 1865 CFISCSI_SESSION_LOCK(cs); 1866 while (cs->cs_login_pdu == NULL && 1867 cs->cs_terminating == false) 1868 cv_wait(&cs->cs_login_cv, &cs->cs_lock); 1869 if (cs->cs_terminating) { 1870 CFISCSI_SESSION_UNLOCK(cs); 1871 snprintf(ci->error_str, sizeof(ci->error_str), "connection terminating"); 1872 ci->status = CTL_ISCSI_ERROR; 1873 return; 1874 } 1875 ip = cs->cs_login_pdu; 1876 cs->cs_login_pdu = NULL; 1877 CFISCSI_SESSION_UNLOCK(cs); 1878 1879 if (ip->ip_data_len > cirp->data_segment_len) { 1880 icl_pdu_free(ip); 1881 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1882 ci->status = CTL_ISCSI_ERROR; 1883 return; 1884 } 1885 1886 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1887 if (ip->ip_data_len > 0) { 1888 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1889 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1890 copyout(data, cirp->data_segment, ip->ip_data_len); 1891 free(data, M_CFISCSI); 1892 } 1893 1894 icl_pdu_free(ip); 1895 ci->status = CTL_ISCSI_OK; 1896} 1897 1898static void 1899cfiscsi_ioctl_close(struct ctl_iscsi *ci) 1900{ 1901 /* 1902 * XXX 1903 */ 1904} 1905#endif /* !ICL_KERNEL_PROXY */ 1906 1907static int 1908cfiscsi_ioctl(struct cdev *dev, 1909 u_long cmd, caddr_t addr, int flag, struct thread *td) 1910{ 1911 struct ctl_iscsi *ci; 1912 1913 if (cmd != CTL_ISCSI) 1914 return (ENOTTY); 1915 1916 ci = (struct ctl_iscsi *)addr; 1917 switch (ci->type) { 1918 case CTL_ISCSI_HANDOFF: 1919 cfiscsi_ioctl_handoff(ci); 1920 break; 1921 case CTL_ISCSI_LIST: 1922 cfiscsi_ioctl_list(ci); 1923 break; 1924 case CTL_ISCSI_TERMINATE: 1925 cfiscsi_ioctl_terminate(ci); 1926 break; 1927 case CTL_ISCSI_LOGOUT: 1928 cfiscsi_ioctl_logout(ci); 1929 break; 1930#ifdef ICL_KERNEL_PROXY 1931 case CTL_ISCSI_LISTEN: 1932 cfiscsi_ioctl_listen(ci); 1933 break; 1934 case CTL_ISCSI_ACCEPT: 1935 cfiscsi_ioctl_accept(ci); 1936 break; 1937 case CTL_ISCSI_SEND: 1938 cfiscsi_ioctl_send(ci); 1939 break; 1940 case CTL_ISCSI_RECEIVE: 1941 cfiscsi_ioctl_receive(ci); 1942 break; 1943 case CTL_ISCSI_CLOSE: 1944 cfiscsi_ioctl_close(ci); 1945 break; 1946#endif /* ICL_KERNEL_PROXY */ 1947 default: 1948 ci->status = CTL_ISCSI_ERROR; 1949 snprintf(ci->error_str, sizeof(ci->error_str), 1950 "%s: invalid iSCSI request type %d", __func__, ci->type); 1951 break; 1952 } 1953 1954 return (0); 1955} 1956 1957static int 1958cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 1959{ 1960 struct cfiscsi_session *cs; 1961 struct scsi_vpd_device_id *devid_ptr; 1962 struct scsi_vpd_id_descriptor *desc, *desc1; 1963 struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */ 1964 struct scsi_vpd_id_t10 *t10id; 1965 struct ctl_lun *lun; 1966 const struct icl_pdu *request; 1967 size_t devid_len, wwpn_len; 1968 1969 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 1970 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 1971 cs = PDU_SESSION(request); 1972 1973 wwpn_len = strlen(cs->cs_target->ct_name); 1974 wwpn_len += strlen(",t,0x01"); 1975 wwpn_len += 1; /* '\0' */ 1976 if ((wwpn_len % 4) != 0) 1977 wwpn_len += (4 - (wwpn_len % 4)); 1978 1979 devid_len = sizeof(struct scsi_vpd_device_id) + 1980 sizeof(struct scsi_vpd_id_descriptor) + 1981 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 1982 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 1983 sizeof(struct scsi_vpd_id_descriptor) + 1984 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 1985 sizeof(struct scsi_vpd_id_descriptor) + 1986 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 1987 1988 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 1989 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 1990 ctsio->kern_sg_entries = 0; 1991 1992 if (devid_len < alloc_len) { 1993 ctsio->residual = alloc_len - devid_len; 1994 ctsio->kern_data_len = devid_len; 1995 ctsio->kern_total_len = devid_len; 1996 } else { 1997 ctsio->residual = 0; 1998 ctsio->kern_data_len = alloc_len; 1999 ctsio->kern_total_len = alloc_len; 2000 } 2001 ctsio->kern_data_resid = 0; 2002 ctsio->kern_rel_offset = 0; 2003 ctsio->kern_sg_entries = 0; 2004 2005 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2006 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2007 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2008 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 2009 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2010 wwpn_len); 2011 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2012 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2013 2014 if (lun != NULL) 2015 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2016 lun->be_lun->lun_type; 2017 else 2018 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2019 2020 devid_ptr->page_code = SVPD_DEVICE_ID; 2021 2022 scsi_ulto2b(devid_len - 4, devid_ptr->length); 2023 2024 /* 2025 * We're using a LUN association here. i.e., this device ID is a 2026 * per-LUN identifier. 2027 */ 2028 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2029 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2030 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 2031 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2032 2033 /* 2034 * If we've actually got a backend, copy the device id from the 2035 * per-LUN data. Otherwise, set it to all spaces. 2036 */ 2037 if (lun != NULL) { 2038 /* 2039 * Copy the backend's LUN ID. 2040 */ 2041 strncpy((char *)t10id->vendor_spec_id, 2042 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2043 } else { 2044 /* 2045 * No backend, set this to spaces. 2046 */ 2047 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2048 } 2049 2050 /* 2051 * desc1 is for the WWPN which is a port asscociation. 2052 */ 2053 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2054 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2055 SVPD_ID_TYPE_SCSI_NAME; 2056 desc1->length = wwpn_len; 2057 snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x", 2058 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2059 2060 /* 2061 * desc2 is for the Relative Target Port(type 4h) identifier 2062 */ 2063 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2064 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2065 SVPD_ID_TYPE_RELTARG; 2066 desc2->length = 4; 2067 desc2->identifier[3] = 1; 2068 2069 /* 2070 * desc3 is for the Target Port Group(type 5h) identifier 2071 */ 2072 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2073 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2074 SVPD_ID_TYPE_TPORTGRP; 2075 desc3->length = 4; 2076 desc3->identifier[3] = 1; 2077 2078 ctsio->scsi_status = SCSI_STATUS_OK; 2079 2080 ctsio->be_move_done = ctl_config_move_done; 2081 ctl_datamove((union ctl_io *)ctsio); 2082 2083 return (CTL_RETVAL_COMPLETE); 2084} 2085 2086static void 2087cfiscsi_target_hold(struct cfiscsi_target *ct) 2088{ 2089 2090 refcount_acquire(&ct->ct_refcount); 2091} 2092 2093static void 2094cfiscsi_target_release(struct cfiscsi_target *ct) 2095{ 2096 int old; 2097 struct cfiscsi_softc *softc; 2098 2099 softc = ct->ct_softc; 2100 2101 old = ct->ct_refcount; 2102 if (old > 1 && atomic_cmpset_int(&ct->ct_refcount, old, old - 1)) 2103 return; 2104 2105 mtx_lock(&softc->lock); 2106 if (refcount_release(&ct->ct_refcount)) { 2107 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2108 mtx_unlock(&softc->lock); 2109 free(ct, M_CFISCSI); 2110 2111 return; 2112 } 2113 mtx_unlock(&softc->lock); 2114} 2115 2116static struct cfiscsi_target * 2117cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2118{ 2119 struct cfiscsi_target *ct; 2120 2121 mtx_lock(&softc->lock); 2122 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2123 if (strcmp(name, ct->ct_name) != 0) 2124 continue; 2125 cfiscsi_target_hold(ct); 2126 mtx_unlock(&softc->lock); 2127 return (ct); 2128 } 2129 mtx_unlock(&softc->lock); 2130 2131 return (NULL); 2132} 2133 2134static struct cfiscsi_target * 2135cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2136 const char *alias) 2137{ 2138 struct cfiscsi_target *ct, *newct; 2139 int i; 2140 2141 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2142 return (NULL); 2143 2144 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2145 2146 mtx_lock(&softc->lock); 2147 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2148 if (strcmp(name, ct->ct_name) != 0) 2149 continue; 2150 cfiscsi_target_hold(ct); 2151 mtx_unlock(&softc->lock); 2152 free(newct, M_CFISCSI); 2153 return (ct); 2154 } 2155 2156 for (i = 0; i < CTL_MAX_LUNS; i++) 2157 newct->ct_luns[i] = -1; 2158 2159 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2160 if (alias != NULL) 2161 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2162 refcount_init(&newct->ct_refcount, 1); 2163 newct->ct_softc = softc; 2164 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2165 mtx_unlock(&softc->lock); 2166 2167 return (newct); 2168} 2169 2170/* 2171 * Takes LUN from the target space and returns LUN from the CTL space. 2172 */ 2173static uint32_t 2174cfiscsi_map_lun(void *arg, uint32_t lun) 2175{ 2176 struct cfiscsi_session *cs; 2177 2178 cs = arg; 2179 2180 if (lun >= CTL_MAX_LUNS) { 2181 CFISCSI_DEBUG("requested lun number %d is higher " 2182 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2183 return (0xffffffff); 2184 } 2185 2186 if (cs->cs_target->ct_luns[lun] < 0) 2187 return (0xffffffff); 2188 2189 return (cs->cs_target->ct_luns[lun]); 2190} 2191 2192static int 2193cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2194 unsigned long lun_id, unsigned long ctl_lun_id) 2195{ 2196 2197 if (lun_id >= CTL_MAX_LUNS) { 2198 CFISCSI_WARN("requested lun number %ld is higher " 2199 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2200 return (-1); 2201 } 2202 2203 if (ct->ct_luns[lun_id] >= 0) { 2204 /* 2205 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2206 * when the LUN is created, and a second time just before 2207 * the port is brought online; don't emit warnings 2208 * for that case. 2209 */ 2210 if (ct->ct_luns[lun_id] == ctl_lun_id) 2211 return (0); 2212 CFISCSI_WARN("lun %ld already allocated", lun_id); 2213 return (-1); 2214 } 2215 2216#if 0 2217 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2218 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2219#endif 2220 2221 ct->ct_luns[lun_id] = ctl_lun_id; 2222 cfiscsi_target_hold(ct); 2223 2224 return (0); 2225} 2226 2227static int 2228cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2229{ 2230 2231 if (ct->ct_luns[lun_id] < 0) { 2232 CFISCSI_WARN("lun %ld not allocated", lun_id); 2233 return (-1); 2234 } 2235 2236 ct->ct_luns[lun_id] = -1; 2237 cfiscsi_target_release(ct); 2238 2239 return (0); 2240} 2241 2242static int 2243cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2244{ 2245 struct cfiscsi_softc *softc; 2246 struct cfiscsi_target *ct; 2247 struct ctl_be_lun_option *opt; 2248 const char *target = NULL, *target_alias = NULL; 2249 const char *lun = NULL; 2250 unsigned long tmp; 2251 2252 softc = (struct cfiscsi_softc *)arg; 2253 2254 STAILQ_FOREACH(opt, 2255 &control_softc->ctl_luns[lun_id]->be_lun->options, links) { 2256 if (strcmp(opt->name, "cfiscsi_target") == 0) 2257 target = opt->value; 2258 else if (strcmp(opt->name, "cfiscsi_target_alias") == 0) 2259 target_alias = opt->value; 2260 else if (strcmp(opt->name, "cfiscsi_lun") == 0) 2261 lun = opt->value; 2262 } 2263 2264 if (target == NULL && lun == NULL) 2265 return (0); 2266 2267 if (target == NULL || lun == NULL) { 2268 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2269 "cfiscsi_lun, or the other way around; ignoring"); 2270 return (0); 2271 } 2272 2273 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2274 if (ct == NULL) { 2275 CFISCSI_WARN("failed to create target \"%s\"", target); 2276 return (0); 2277 } 2278 2279 tmp = strtoul(lun, NULL, 10); 2280 cfiscsi_target_set_lun(ct, tmp, lun_id); 2281 return (0); 2282} 2283 2284static int 2285cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2286{ 2287 struct cfiscsi_softc *softc; 2288 struct cfiscsi_target *ct; 2289 int i; 2290 2291 softc = (struct cfiscsi_softc *)arg; 2292 2293 mtx_lock(&softc->lock); 2294 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2295 for (i = 0; i < CTL_MAX_LUNS; i++) { 2296 if (ct->ct_luns[i] < 0) 2297 continue; 2298 if (ct->ct_luns[i] != lun_id) 2299 continue; 2300 cfiscsi_target_unset_lun(ct, i); 2301 break; 2302 } 2303 } 2304 mtx_unlock(&softc->lock); 2305 return (0); 2306} 2307 2308static void 2309cfiscsi_datamove_in(union ctl_io *io) 2310{ 2311 struct cfiscsi_session *cs; 2312 struct icl_pdu *request, *response; 2313 const struct iscsi_bhs_scsi_command *bhssc; 2314 struct iscsi_bhs_data_in *bhsdi; 2315 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2316 size_t len, expected_len, sg_len, buffer_offset; 2317 const char *sg_addr; 2318 int ctl_sg_count, error, i; 2319 2320 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2321 cs = PDU_SESSION(request); 2322 2323 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2324 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2325 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2326 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2327 2328 if (io->scsiio.kern_sg_entries > 0) { 2329 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2330 ctl_sg_count = io->scsiio.kern_sg_entries; 2331 } else { 2332 ctl_sglist = &ctl_sg_entry; 2333 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2334 ctl_sglist->len = io->scsiio.kern_data_len; 2335 ctl_sg_count = 1; 2336 } 2337 2338 /* 2339 * This is the total amount of data to be transferred within the current 2340 * SCSI command. We need to record it so that we can properly report 2341 * underflow/underflow. 2342 */ 2343 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2344 2345 /* 2346 * This is the offset within the current SCSI command; for the first 2347 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2348 * it will be the sum of lengths of previous ones. It's being 2349 * incremented as we append data to the data segment. 2350 */ 2351 buffer_offset = io->scsiio.kern_rel_offset; 2352 2353 /* 2354 * This is the transfer length expected by the initiator. In theory, 2355 * it could be different from the correct amount of data from the SCSI 2356 * point of view, even if that doesn't make any sense. 2357 */ 2358 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2359#if 0 2360 if (expected_len != io->scsiio.kern_total_len) 2361 CFISCSI_SESSION_DEBUG(cs, "expected transfer length = %zd, " 2362 "actual length = %zd", expected_len, 2363 io->scsiio.kern_total_len); 2364#endif 2365 2366 if (buffer_offset >= expected_len) { 2367#if 0 2368 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2369 "already sent the expected len", buffer_offset); 2370#endif 2371 io->scsiio.ext_data_filled = io->scsiio.kern_total_len; 2372 io->scsiio.be_move_done(io); 2373 return; 2374 } 2375 2376 i = 0; 2377 sg_addr = NULL; 2378 sg_len = 0; 2379 response = NULL; 2380 bhsdi = NULL; 2381 for (;;) { 2382 if (response == NULL) { 2383 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2384 if (response == NULL) { 2385 CFISCSI_SESSION_WARN(cs, "failed to " 2386 "allocate memory; dropping connection"); 2387 ctl_set_busy(&io->scsiio); 2388 io->scsiio.be_move_done(io); 2389 cfiscsi_session_terminate(cs); 2390 return; 2391 } 2392 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2393 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2394 bhsdi->bhsdi_initiator_task_tag = 2395 bhssc->bhssc_initiator_task_tag; 2396 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2397 PDU_EXPDATASN(request)++; 2398 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2399 } 2400 2401 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2402 if (sg_len == 0) { 2403 sg_addr = ctl_sglist[i].addr; 2404 sg_len = ctl_sglist[i].len; 2405 KASSERT(sg_len > 0, ("sg_len <= 0")); 2406 } 2407 2408 len = sg_len; 2409 2410 /* 2411 * Truncate to maximum data segment length. 2412 */ 2413 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2414 ("max_data_segment_length %zd >= ip_data_len %zd", 2415 response->ip_data_len, cs->cs_max_data_segment_length)); 2416 if (response->ip_data_len + len > 2417 cs->cs_max_data_segment_length) 2418 len = cs->cs_max_data_segment_length - 2419 response->ip_data_len; 2420 2421 /* 2422 * Truncate to expected data transfer length. 2423 */ 2424 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2425 ("%zd >= %zd", buffer_offset + response->ip_data_len, expected_len)); 2426 if (buffer_offset + response->ip_data_len + len > expected_len) { 2427 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2428 "to expected data transfer length %zd", 2429 buffer_offset + response->ip_data_len + len, expected_len); 2430 len = expected_len - (buffer_offset + response->ip_data_len); 2431 } 2432 2433 KASSERT(len <= sg_len, ("len > sg_len")); 2434 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2435 if (error != 0) { 2436 CFISCSI_SESSION_WARN(cs, "failed to " 2437 "allocate memory; dropping connection"); 2438 icl_pdu_free(response); 2439 ctl_set_busy(&io->scsiio); 2440 io->scsiio.be_move_done(io); 2441 cfiscsi_session_terminate(cs); 2442 return; 2443 } 2444 sg_addr += len; 2445 sg_len -= len; 2446 buffer_offset += len; 2447 io->scsiio.ext_data_filled += len; 2448 2449 if (buffer_offset == expected_len) { 2450 /* 2451 * Already have the amount of data the initiator wanted. 2452 */ 2453 break; 2454 } 2455 2456 if (sg_len == 0) { 2457 /* 2458 * End of scatter-gather segment; 2459 * proceed to the next one... 2460 */ 2461 if (i == ctl_sg_count - 1) { 2462 /* 2463 * ... unless this was the last one. 2464 */ 2465 break; 2466 } 2467 i++; 2468 } 2469 2470 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2471 /* 2472 * Can't stuff more data into the current PDU; 2473 * queue it. Note that's not enough to check 2474 * for kern_data_resid == 0 instead; there 2475 * may be several Data-In PDUs for the final 2476 * call to cfiscsi_datamove(), and we want 2477 * to set the F flag only on the last of them. 2478 */ 2479 if (buffer_offset == io->scsiio.kern_total_len || 2480 buffer_offset == expected_len) 2481 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2482 cfiscsi_pdu_queue(response); 2483 response = NULL; 2484 bhsdi = NULL; 2485 } 2486 } 2487 if (response != NULL) { 2488 if (buffer_offset == io->scsiio.kern_total_len || 2489 buffer_offset == expected_len) 2490 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2491 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2492 cfiscsi_pdu_queue(response); 2493 } 2494 2495 io->scsiio.be_move_done(io); 2496} 2497 2498static void 2499cfiscsi_datamove_out(union ctl_io *io) 2500{ 2501 struct cfiscsi_session *cs; 2502 struct icl_pdu *request, *response; 2503 const struct iscsi_bhs_scsi_command *bhssc; 2504 struct iscsi_bhs_r2t *bhsr2t; 2505 struct cfiscsi_data_wait *cdw; 2506 uint32_t target_transfer_tag; 2507 bool done; 2508 2509 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2510 cs = PDU_SESSION(request); 2511 2512 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2513 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2514 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2515 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2516 2517 /* 2518 * We need to record it so that we can properly report 2519 * underflow/underflow. 2520 */ 2521 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2522 2523 target_transfer_tag = 2524 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2525 2526#if 0 2527 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2528 "task tag 0x%x, target transfer tag 0x%x", 2529 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2530#endif 2531 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2532 if (cdw == NULL) { 2533 CFISCSI_SESSION_WARN(cs, "failed to " 2534 "allocate memory; dropping connection"); 2535 ctl_set_busy(&io->scsiio); 2536 io->scsiio.be_move_done(io); 2537 cfiscsi_session_terminate(cs); 2538 return; 2539 } 2540 cdw->cdw_ctl_io = io; 2541 cdw->cdw_target_transfer_tag = target_transfer_tag; 2542 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2543 2544 if (cs->cs_immediate_data && icl_pdu_data_segment_length(request) > 0) { 2545 done = cfiscsi_handle_data_segment(request, cdw); 2546 if (done) { 2547 uma_zfree(cfiscsi_data_wait_zone, cdw); 2548 io->scsiio.be_move_done(io); 2549 return; 2550 } 2551 2552#if 0 2553 if (io->scsiio.ext_data_filled != 0) 2554 CFISCSI_SESSION_DEBUG(cs, "got %zd bytes of immediate data, need %zd", 2555 io->scsiio.ext_data_filled, io->scsiio.kern_data_len); 2556#endif 2557 } 2558 2559 CFISCSI_SESSION_LOCK(cs); 2560 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2561 CFISCSI_SESSION_UNLOCK(cs); 2562 2563 /* 2564 * XXX: We should limit the number of outstanding R2T PDUs 2565 * per task to MaxOutstandingR2T. 2566 */ 2567 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2568 if (response == NULL) { 2569 CFISCSI_SESSION_WARN(cs, "failed to " 2570 "allocate memory; dropping connection"); 2571 ctl_set_busy(&io->scsiio); 2572 io->scsiio.be_move_done(io); 2573 cfiscsi_session_terminate(cs); 2574 return; 2575 } 2576 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2577 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2578 bhsr2t->bhsr2t_flags = 0x80; 2579 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2580 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2581 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2582 /* 2583 * XXX: Here we assume that cfiscsi_datamove() won't ever 2584 * be running concurrently on several CPUs for a given 2585 * command. 2586 */ 2587 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2588 PDU_R2TSN(request)++; 2589 /* 2590 * This is the offset within the current SCSI command; 2591 * i.e. for the first call of datamove(), it will be 0, 2592 * and for subsequent ones it will be the sum of lengths 2593 * of previous ones. 2594 * 2595 * The ext_data_filled is to account for unsolicited 2596 * (immediate) data that might have already arrived. 2597 */ 2598 bhsr2t->bhsr2t_buffer_offset = 2599 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2600 /* 2601 * This is the total length (sum of S/G lengths) this call 2602 * to cfiscsi_datamove() is supposed to handle. 2603 * 2604 * XXX: Limit it to MaxBurstLength. 2605 */ 2606 bhsr2t->bhsr2t_desired_data_transfer_length = 2607 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2608 cfiscsi_pdu_queue(response); 2609} 2610 2611static void 2612cfiscsi_datamove(union ctl_io *io) 2613{ 2614 2615 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2616 cfiscsi_datamove_in(io); 2617 else 2618 cfiscsi_datamove_out(io); 2619} 2620 2621static void 2622cfiscsi_scsi_command_done(union ctl_io *io) 2623{ 2624 struct icl_pdu *request, *response; 2625 struct iscsi_bhs_scsi_command *bhssc; 2626 struct iscsi_bhs_scsi_response *bhssr; 2627#ifdef DIAGNOSTIC 2628 struct cfiscsi_data_wait *cdw; 2629#endif 2630 struct cfiscsi_session *cs; 2631 uint16_t sense_length; 2632 2633 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2634 cs = PDU_SESSION(request); 2635 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2636 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2637 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2638 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2639 2640 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2641 // bhssc->bhssc_initiator_task_tag); 2642 2643#ifdef DIAGNOSTIC 2644 CFISCSI_SESSION_LOCK(cs); 2645 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2646 KASSERT(bhssc->bhssc_initiator_task_tag != 2647 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2648 CFISCSI_SESSION_UNLOCK(cs); 2649#endif 2650 2651 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2652 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2653 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2654 bhssr->bhssr_flags = 0x80; 2655 /* 2656 * XXX: We don't deal with bidirectional under/overflows; 2657 * does anything actually support those? 2658 */ 2659 if (PDU_TOTAL_TRANSFER_LEN(request) < 2660 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2661 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2662 bhssr->bhssr_residual_count = 2663 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2664 PDU_TOTAL_TRANSFER_LEN(request)); 2665 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2666 // ntohl(bhssr->bhssr_residual_count)); 2667 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2668 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2669 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2670 bhssr->bhssr_residual_count = 2671 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2672 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2673 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2674 // ntohl(bhssr->bhssr_residual_count)); 2675 } 2676 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2677 bhssr->bhssr_status = io->scsiio.scsi_status; 2678 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2679 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2680 2681 if (io->scsiio.sense_len > 0) { 2682#if 0 2683 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2684 io->scsiio.sense_len); 2685#endif 2686 sense_length = htons(io->scsiio.sense_len); 2687 icl_pdu_append_data(response, 2688 &sense_length, sizeof(sense_length), M_WAITOK); 2689 icl_pdu_append_data(response, 2690 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2691 } 2692 2693 ctl_free_io(io); 2694 icl_pdu_free(request); 2695 cfiscsi_pdu_queue(response); 2696} 2697 2698static void 2699cfiscsi_task_management_done(union ctl_io *io) 2700{ 2701 struct icl_pdu *request, *response; 2702 struct iscsi_bhs_task_management_request *bhstmr; 2703 struct iscsi_bhs_task_management_response *bhstmr2; 2704 struct cfiscsi_data_wait *cdw, *tmpcdw; 2705 struct cfiscsi_session *cs; 2706 2707 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2708 cs = PDU_SESSION(request); 2709 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2710 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2711 ISCSI_BHS_OPCODE_TASK_REQUEST, 2712 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2713 2714#if 0 2715 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2716 bhstmr->bhstmr_initiator_task_tag, 2717 bhstmr->bhstmr_referenced_task_tag); 2718#endif 2719 2720 if ((bhstmr->bhstmr_function & ~0x80) == 2721 BHSTMR_FUNCTION_ABORT_TASK) { 2722 /* 2723 * Make sure we no longer wait for Data-Out for this command. 2724 */ 2725 CFISCSI_SESSION_LOCK(cs); 2726 TAILQ_FOREACH_SAFE(cdw, 2727 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2728 if (bhstmr->bhstmr_referenced_task_tag != 2729 cdw->cdw_initiator_task_tag) 2730 continue; 2731 2732#if 0 2733 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2734 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2735#endif 2736 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2737 cdw, cdw_next); 2738 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2739 uma_zfree(cfiscsi_data_wait_zone, cdw); 2740 } 2741 CFISCSI_SESSION_UNLOCK(cs); 2742 } 2743 2744 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2745 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2746 response->ip_bhs; 2747 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2748 bhstmr2->bhstmr_flags = 0x80; 2749 if (io->io_hdr.status == CTL_SUCCESS) { 2750 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2751 } else { 2752 /* 2753 * XXX: How to figure out what exactly went wrong? iSCSI spec 2754 * expects us to provide detailed error, e.g. "Task does 2755 * not exist" or "LUN does not exist". 2756 */ 2757 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2758 bhstmr2->bhstmr_response = 2759 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2760 } 2761 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2762 2763 ctl_free_io(io); 2764 icl_pdu_free(request); 2765 cfiscsi_pdu_queue(response); 2766} 2767 2768static void 2769cfiscsi_done(union ctl_io *io) 2770{ 2771 struct icl_pdu *request; 2772 struct cfiscsi_session *cs; 2773 2774 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2775 ("invalid CTL status %#x", io->io_hdr.status)); 2776 2777 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2778 if (request == NULL) { 2779 /* 2780 * Implicit task termination has just completed; nothing to do. 2781 */ 2782 return; 2783 } 2784 2785 cs = PDU_SESSION(request); 2786 refcount_release(&cs->cs_outstanding_ctl_pdus); 2787 2788 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2789 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2790 cfiscsi_scsi_command_done(io); 2791 break; 2792 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2793 cfiscsi_task_management_done(io); 2794 break; 2795 default: 2796 panic("cfiscsi_done called with wrong opcode 0x%x", 2797 request->ip_bhs->bhs_opcode); 2798 } 2799} 2800