ctl_frontend_iscsi.c revision 273307
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: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 273307 2014-10-20 07:28:18Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 273307 2014-10-20 07:28:18Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capability.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include <dev/iscsi/icl.h> 71#include <dev/iscsi/iscsi_proto.h> 72#include <cam/ctl/ctl_frontend_iscsi.h> 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 3; 88TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95static int login_timeout = 60; 96TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99static int maxcmdsn_delta = 256; 100TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105#define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113#define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130#define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145#define PDU_EXPDATASN(X) (X)->ip_prv0 146#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147#define PDU_R2TSN(X) (X)->ip_prv2 148 149int cfiscsi_init(void); 150static void cfiscsi_online(void *arg); 151static void cfiscsi_offline(void *arg); 152static int cfiscsi_info(void *arg, struct sbuf *sb); 153static int cfiscsi_lun_enable(void *arg, 154 struct ctl_id target_id, int lun_id); 155static int cfiscsi_lun_disable(void *arg, 156 struct ctl_id target_id, int lun_id); 157static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 158static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160static void cfiscsi_datamove(union ctl_io *io); 161static void cfiscsi_done(union ctl_io *io); 162static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 163static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 164static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 165static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 168static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 169static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 170 *softc, const char *name); 171static struct cfiscsi_target *cfiscsi_target_find_or_create( 172 struct cfiscsi_softc *softc, const char *name, const char *alias); 173static void cfiscsi_target_release(struct cfiscsi_target *ct); 174static void cfiscsi_session_delete(struct cfiscsi_session *cs); 175 176static struct cfiscsi_softc cfiscsi_softc; 177extern struct ctl_softc *control_softc; 178 179static struct ctl_frontend cfiscsi_frontend = 180{ 181 .name = "iscsi", 182 .init = cfiscsi_init, 183 .ioctl = cfiscsi_ioctl, 184}; 185CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 186MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 187 188static struct icl_pdu * 189cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 190{ 191 192 return (icl_pdu_new_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_port.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_port.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->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 562 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 563 case BHSSC_FLAGS_ATTR_UNTAGGED: 564 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 565 break; 566 case BHSSC_FLAGS_ATTR_SIMPLE: 567 io->scsiio.tag_type = CTL_TAG_SIMPLE; 568 break; 569 case BHSSC_FLAGS_ATTR_ORDERED: 570 io->scsiio.tag_type = CTL_TAG_ORDERED; 571 break; 572 case BHSSC_FLAGS_ATTR_HOQ: 573 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 574 break; 575 case BHSSC_FLAGS_ATTR_ACA: 576 io->scsiio.tag_type = CTL_TAG_ACA; 577 break; 578 default: 579 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 580 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 581 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 582 break; 583 } 584 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 585 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 586 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 587 error = ctl_queue(io); 588 if (error != CTL_RETVAL_COMPLETE) { 589 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 590 "dropping connection", error); 591 ctl_free_io(io); 592 refcount_release(&cs->cs_outstanding_ctl_pdus); 593 icl_pdu_free(request); 594 cfiscsi_session_terminate(cs); 595 } 596} 597 598static void 599cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 600{ 601 struct iscsi_bhs_task_management_request *bhstmr; 602 struct iscsi_bhs_task_management_response *bhstmr2; 603 struct icl_pdu *response; 604 struct cfiscsi_session *cs; 605 union ctl_io *io; 606 int error; 607 608 cs = PDU_SESSION(request); 609 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 610 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 611 if (io == NULL) { 612 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 613 "dropping connection"); 614 icl_pdu_free(request); 615 cfiscsi_session_terminate(cs); 616 return; 617 } 618 ctl_zero_io(io); 619 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 620 io->io_hdr.io_type = CTL_IO_TASK; 621 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 622 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 623 io->io_hdr.nexus.targ_target.id = 0; 624 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 625 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 626 627 switch (bhstmr->bhstmr_function & ~0x80) { 628 case BHSTMR_FUNCTION_ABORT_TASK: 629#if 0 630 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 631#endif 632 io->taskio.task_action = CTL_TASK_ABORT_TASK; 633 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 634 break; 635 case BHSTMR_FUNCTION_ABORT_TASK_SET: 636#if 0 637 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 638#endif 639 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 640 break; 641 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 642#if 0 643 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 644#endif 645 io->taskio.task_action = CTL_TASK_LUN_RESET; 646 break; 647 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 648#if 0 649 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 650#endif 651 io->taskio.task_action = CTL_TASK_TARGET_RESET; 652 break; 653 default: 654 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 655 bhstmr->bhstmr_function & ~0x80); 656 ctl_free_io(io); 657 658 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 659 if (response == NULL) { 660 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 661 "dropping connection"); 662 icl_pdu_free(request); 663 cfiscsi_session_terminate(cs); 664 return; 665 } 666 bhstmr2 = (struct iscsi_bhs_task_management_response *) 667 response->ip_bhs; 668 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 669 bhstmr2->bhstmr_flags = 0x80; 670 bhstmr2->bhstmr_response = 671 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 672 bhstmr2->bhstmr_initiator_task_tag = 673 bhstmr->bhstmr_initiator_task_tag; 674 icl_pdu_free(request); 675 cfiscsi_pdu_queue(response); 676 return; 677 } 678 679 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 680 error = ctl_queue(io); 681 if (error != CTL_RETVAL_COMPLETE) { 682 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 683 "dropping connection", error); 684 ctl_free_io(io); 685 refcount_release(&cs->cs_outstanding_ctl_pdus); 686 icl_pdu_free(request); 687 cfiscsi_session_terminate(cs); 688 } 689} 690 691static bool 692cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 693{ 694 struct iscsi_bhs_data_out *bhsdo; 695 struct cfiscsi_session *cs; 696 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 697 size_t copy_len, len, off, buffer_offset; 698 int ctl_sg_count; 699 union ctl_io *io; 700 701 cs = PDU_SESSION(request); 702 703 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 704 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 705 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 706 ISCSI_BHS_OPCODE_SCSI_COMMAND, 707 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 708 709 /* 710 * We're only using fields common for Data-Out and SCSI Command PDUs. 711 */ 712 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 713 714 io = cdw->cdw_ctl_io; 715 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 716 ("CTL_FLAG_DATA_IN")); 717 718#if 0 719 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 720 request->ip_data_len, io->scsiio.kern_total_len); 721#endif 722 723 if (io->scsiio.kern_sg_entries > 0) { 724 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 725 ctl_sg_count = io->scsiio.kern_sg_entries; 726 } else { 727 ctl_sglist = &ctl_sg_entry; 728 ctl_sglist->addr = io->scsiio.kern_data_ptr; 729 ctl_sglist->len = io->scsiio.kern_data_len; 730 ctl_sg_count = 1; 731 } 732 733 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 734 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 735 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 736 else 737 buffer_offset = 0; 738 len = icl_pdu_data_segment_length(request); 739 740 /* 741 * Make sure the offset, as sent by the initiator, matches the offset 742 * we're supposed to be at in the scatter-gather list. 743 */ 744 if (buffer_offset > 745 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 746 buffer_offset + len <= 747 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 748 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 749 "expected %zd; dropping connection", buffer_offset, 750 (size_t)io->scsiio.kern_rel_offset + 751 (size_t)io->scsiio.ext_data_filled); 752 ctl_set_data_phase_error(&io->scsiio); 753 cfiscsi_session_terminate(cs); 754 return (true); 755 } 756 757 /* 758 * This is the offset within the PDU data segment, as opposed 759 * to buffer_offset, which is the offset within the task (SCSI 760 * command). 761 */ 762 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 763 buffer_offset; 764 765 /* 766 * Iterate over the scatter/gather segments, filling them with data 767 * from the PDU data segment. Note that this can get called multiple 768 * times for one SCSI command; the cdw structure holds state for the 769 * scatter/gather list. 770 */ 771 for (;;) { 772 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 773 ("cdw->cdw_sg_index >= ctl_sg_count")); 774 if (cdw->cdw_sg_len == 0) { 775 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 776 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 777 } 778 KASSERT(off <= len, ("len > off")); 779 copy_len = len - off; 780 if (copy_len > cdw->cdw_sg_len) 781 copy_len = cdw->cdw_sg_len; 782 783 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 784 cdw->cdw_sg_addr += copy_len; 785 cdw->cdw_sg_len -= copy_len; 786 off += copy_len; 787 io->scsiio.ext_data_filled += copy_len; 788 789 if (cdw->cdw_sg_len == 0) { 790 /* 791 * End of current segment. 792 */ 793 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 794 /* 795 * Last segment in scatter/gather list. 796 */ 797 break; 798 } 799 cdw->cdw_sg_index++; 800 } 801 802 if (off == len) { 803 /* 804 * End of PDU payload. 805 */ 806 break; 807 } 808 } 809 810 if (len > off) { 811 /* 812 * In case of unsolicited data, it's possible that the buffer 813 * provided by CTL is smaller than negotiated FirstBurstLength. 814 * Just ignore the superfluous data; will ask for them with R2T 815 * on next call to cfiscsi_datamove(). 816 * 817 * This obviously can only happen with SCSI Command PDU. 818 */ 819 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 820 ISCSI_BHS_OPCODE_SCSI_COMMAND) 821 return (true); 822 823 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 824 "expected %zd; dropping connection", 825 icl_pdu_data_segment_length(request), off); 826 ctl_set_data_phase_error(&io->scsiio); 827 cfiscsi_session_terminate(cs); 828 return (true); 829 } 830 831 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len && 832 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 833 CFISCSI_SESSION_WARN(cs, "got the final packet without " 834 "the F flag; flags = 0x%x; dropping connection", 835 bhsdo->bhsdo_flags); 836 ctl_set_data_phase_error(&io->scsiio); 837 cfiscsi_session_terminate(cs); 838 return (true); 839 } 840 841 if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len && 842 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 843 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 844 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 845 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 846 "transmitted size was %zd bytes instead of %d; " 847 "dropping connection", 848 (size_t)io->scsiio.ext_data_filled, 849 io->scsiio.kern_data_len); 850 ctl_set_data_phase_error(&io->scsiio); 851 cfiscsi_session_terminate(cs); 852 return (true); 853 } else { 854 /* 855 * For SCSI Command PDU, this just means we need to 856 * solicit more data by sending R2T. 857 */ 858 return (false); 859 } 860 } 861 862 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) { 863#if 0 864 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 865 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 866#endif 867 868 return (true); 869 } 870 871 return (false); 872} 873 874static void 875cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 876{ 877 struct iscsi_bhs_data_out *bhsdo; 878 struct cfiscsi_session *cs; 879 struct cfiscsi_data_wait *cdw = NULL; 880 union ctl_io *io; 881 bool done; 882 883 cs = PDU_SESSION(request); 884 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 885 886 CFISCSI_SESSION_LOCK(cs); 887 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 888#if 0 889 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 890 "ttt 0x%x, itt 0x%x", 891 bhsdo->bhsdo_target_transfer_tag, 892 bhsdo->bhsdo_initiator_task_tag, 893 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 894#endif 895 if (bhsdo->bhsdo_target_transfer_tag == 896 cdw->cdw_target_transfer_tag) 897 break; 898 } 899 CFISCSI_SESSION_UNLOCK(cs); 900 if (cdw == NULL) { 901 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 902 "0x%x, not found; dropping connection", 903 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 904 icl_pdu_free(request); 905 cfiscsi_session_terminate(cs); 906 return; 907 } 908 909 io = cdw->cdw_ctl_io; 910 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 911 ("CTL_FLAG_DATA_IN")); 912 913 done = cfiscsi_handle_data_segment(request, cdw); 914 if (done) { 915 CFISCSI_SESSION_LOCK(cs); 916 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 917 CFISCSI_SESSION_UNLOCK(cs); 918 uma_zfree(cfiscsi_data_wait_zone, cdw); 919 io->scsiio.be_move_done(io); 920 } 921 922 icl_pdu_free(request); 923} 924 925static void 926cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 927{ 928 struct iscsi_bhs_logout_request *bhslr; 929 struct iscsi_bhs_logout_response *bhslr2; 930 struct icl_pdu *response; 931 struct cfiscsi_session *cs; 932 933 cs = PDU_SESSION(request); 934 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 935 switch (bhslr->bhslr_reason & 0x7f) { 936 case BHSLR_REASON_CLOSE_SESSION: 937 case BHSLR_REASON_CLOSE_CONNECTION: 938 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 939 if (response == NULL) { 940 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 941 icl_pdu_free(request); 942 cfiscsi_session_terminate(cs); 943 return; 944 } 945 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 946 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 947 bhslr2->bhslr_flags = 0x80; 948 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 949 bhslr2->bhslr_initiator_task_tag = 950 bhslr->bhslr_initiator_task_tag; 951 icl_pdu_free(request); 952 cfiscsi_pdu_queue(response); 953 cfiscsi_session_terminate(cs); 954 break; 955 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 956 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 957 if (response == NULL) { 958 CFISCSI_SESSION_WARN(cs, 959 "failed to allocate memory; dropping connection"); 960 icl_pdu_free(request); 961 cfiscsi_session_terminate(cs); 962 return; 963 } 964 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 965 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 966 bhslr2->bhslr_flags = 0x80; 967 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 968 bhslr2->bhslr_initiator_task_tag = 969 bhslr->bhslr_initiator_task_tag; 970 icl_pdu_free(request); 971 cfiscsi_pdu_queue(response); 972 break; 973 default: 974 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 975 bhslr->bhslr_reason); 976 icl_pdu_free(request); 977 cfiscsi_session_terminate(cs); 978 break; 979 } 980} 981 982static void 983cfiscsi_callout(void *context) 984{ 985 struct icl_pdu *cp; 986 struct iscsi_bhs_nop_in *bhsni; 987 struct cfiscsi_session *cs; 988 989 cs = context; 990 991 if (cs->cs_terminating) 992 return; 993 994 callout_schedule(&cs->cs_callout, 1 * hz); 995 996 atomic_add_int(&cs->cs_timeout, 1); 997 998#ifdef ICL_KERNEL_PROXY 999 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1000 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1001 CFISCSI_SESSION_WARN(cs, "login timed out after " 1002 "%d seconds; dropping connection", cs->cs_timeout); 1003 cfiscsi_session_terminate(cs); 1004 } 1005 return; 1006 } 1007#endif 1008 1009 if (ping_timeout <= 0) { 1010 /* 1011 * Pings are disabled. Don't send NOP-In in this case; 1012 * user might have disabled pings to work around problems 1013 * with certain initiators that can't properly handle 1014 * NOP-In, such as iPXE. Reset the timeout, to avoid 1015 * triggering reconnection, should the user decide to 1016 * reenable them. 1017 */ 1018 cs->cs_timeout = 0; 1019 return; 1020 } 1021 1022 if (cs->cs_timeout >= ping_timeout) { 1023 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1024 "dropping connection", ping_timeout); 1025 cfiscsi_session_terminate(cs); 1026 return; 1027 } 1028 1029 /* 1030 * If the ping was reset less than one second ago - which means 1031 * that we've received some PDU during the last second - assume 1032 * the traffic flows correctly and don't bother sending a NOP-Out. 1033 * 1034 * (It's 2 - one for one second, and one for incrementing is_timeout 1035 * earlier in this routine.) 1036 */ 1037 if (cs->cs_timeout < 2) 1038 return; 1039 1040 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1041 if (cp == NULL) { 1042 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1043 return; 1044 } 1045 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1046 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1047 bhsni->bhsni_flags = 0x80; 1048 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1049 1050 cfiscsi_pdu_queue(cp); 1051} 1052 1053static void 1054cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1055{ 1056 struct cfiscsi_data_wait *cdw; 1057 union ctl_io *io; 1058 int error, last; 1059 1060 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1061 if (io == NULL) { 1062 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1063 return; 1064 } 1065 ctl_zero_io(io); 1066 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1067 io->io_hdr.io_type = CTL_IO_TASK; 1068 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1069 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1070 io->io_hdr.nexus.targ_target.id = 0; 1071 io->io_hdr.nexus.targ_lun = 0; 1072 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1073 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1074 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1075 error = ctl_queue(io); 1076 if (error != CTL_RETVAL_COMPLETE) { 1077 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1078 refcount_release(&cs->cs_outstanding_ctl_pdus); 1079 ctl_free_io(io); 1080 } 1081 1082 CFISCSI_SESSION_LOCK(cs); 1083 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1084 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1085 CFISCSI_SESSION_UNLOCK(cs); 1086 /* 1087 * Set nonzero port status; this prevents backends from 1088 * assuming that the data transfer actually succeeded 1089 * and writing uninitialized data to disk. 1090 */ 1091 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1092 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1093 uma_zfree(cfiscsi_data_wait_zone, cdw); 1094 CFISCSI_SESSION_LOCK(cs); 1095 } 1096 CFISCSI_SESSION_UNLOCK(cs); 1097 1098 /* 1099 * Wait for CTL to terminate all the tasks. 1100 */ 1101 for (;;) { 1102 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1103 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1104 if (last != 0) 1105 break; 1106 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, " 1107 "%d remaining", cs->cs_outstanding_ctl_pdus); 1108 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1109 0, "cfiscsi_terminate", hz / 100); 1110 } 1111} 1112 1113static void 1114cfiscsi_maintenance_thread(void *arg) 1115{ 1116 struct cfiscsi_session *cs; 1117 1118 cs = arg; 1119 1120 for (;;) { 1121 CFISCSI_SESSION_LOCK(cs); 1122 if (cs->cs_terminating == false) 1123 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1124 CFISCSI_SESSION_UNLOCK(cs); 1125 1126 if (cs->cs_terminating) { 1127 1128 /* 1129 * We used to wait up to 30 seconds to deliver queued 1130 * PDUs to the initiator. We also tried hard to deliver 1131 * SCSI Responses for the aborted PDUs. We don't do 1132 * that anymore. We might need to revisit that. 1133 */ 1134 callout_drain(&cs->cs_callout); 1135 icl_conn_shutdown(cs->cs_conn); 1136 icl_conn_close(cs->cs_conn); 1137 1138 /* 1139 * At this point ICL receive thread is no longer 1140 * running; no new tasks can be queued. 1141 */ 1142 cfiscsi_session_terminate_tasks(cs); 1143 cfiscsi_session_delete(cs); 1144 kthread_exit(); 1145 return; 1146 } 1147 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1148 } 1149} 1150 1151static void 1152cfiscsi_session_terminate(struct cfiscsi_session *cs) 1153{ 1154 1155 if (cs->cs_terminating) 1156 return; 1157 cs->cs_terminating = true; 1158 cv_signal(&cs->cs_maintenance_cv); 1159#ifdef ICL_KERNEL_PROXY 1160 cv_signal(&cs->cs_login_cv); 1161#endif 1162} 1163 1164static int 1165cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1166{ 1167 struct cfiscsi_target *ct; 1168 char *name; 1169 int i; 1170 1171 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1172 1173 ct = cs->cs_target; 1174 name = strdup(cs->cs_initiator_id, M_CTL); 1175 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1176 if (i < 0) { 1177 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1178 i); 1179 cs->cs_ctl_initid = -1; 1180 return (1); 1181 } 1182 cs->cs_ctl_initid = i; 1183#if 0 1184 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1185#endif 1186 1187 return (0); 1188} 1189 1190static void 1191cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1192{ 1193 int error; 1194 1195 if (cs->cs_ctl_initid == -1) 1196 return; 1197 1198 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1199 if (error != 0) { 1200 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1201 error); 1202 } 1203 cs->cs_ctl_initid = -1; 1204} 1205 1206static struct cfiscsi_session * 1207cfiscsi_session_new(struct cfiscsi_softc *softc) 1208{ 1209 struct cfiscsi_session *cs; 1210 int error; 1211 1212 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1213 if (cs == NULL) { 1214 CFISCSI_WARN("malloc failed"); 1215 return (NULL); 1216 } 1217 cs->cs_ctl_initid = -1; 1218 1219 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1220 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1221 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1222 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1223#ifdef ICL_KERNEL_PROXY 1224 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1225#endif 1226 1227 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1228 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1229 cs->cs_conn->ic_error = cfiscsi_error_callback; 1230 cs->cs_conn->ic_prv0 = cs; 1231 1232 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1233 if (error != 0) { 1234 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1235 free(cs, M_CFISCSI); 1236 return (NULL); 1237 } 1238 1239 mtx_lock(&softc->lock); 1240 cs->cs_id = softc->last_session_id + 1; 1241 softc->last_session_id++; 1242 mtx_unlock(&softc->lock); 1243 1244 mtx_lock(&softc->lock); 1245 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1246 mtx_unlock(&softc->lock); 1247 1248 /* 1249 * Start pinging the initiator. 1250 */ 1251 callout_init(&cs->cs_callout, 1); 1252 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1253 1254 return (cs); 1255} 1256 1257static void 1258cfiscsi_session_delete(struct cfiscsi_session *cs) 1259{ 1260 struct cfiscsi_softc *softc; 1261 1262 softc = &cfiscsi_softc; 1263 1264 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1265 ("destroying session with outstanding CTL pdus")); 1266 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1267 ("destroying session with non-empty queue")); 1268 1269 cfiscsi_session_unregister_initiator(cs); 1270 if (cs->cs_target != NULL) 1271 cfiscsi_target_release(cs->cs_target); 1272 icl_conn_close(cs->cs_conn); 1273 icl_conn_free(cs->cs_conn); 1274 1275 mtx_lock(&softc->lock); 1276 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1277 mtx_unlock(&softc->lock); 1278 1279 free(cs, M_CFISCSI); 1280} 1281 1282int 1283cfiscsi_init(void) 1284{ 1285 struct cfiscsi_softc *softc; 1286 int retval; 1287 1288 softc = &cfiscsi_softc; 1289 retval = 0; 1290 bzero(softc, sizeof(*softc)); 1291 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1292 1293#ifdef ICL_KERNEL_PROXY 1294 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1295#endif 1296 TAILQ_INIT(&softc->sessions); 1297 TAILQ_INIT(&softc->targets); 1298 1299 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1300 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1301 UMA_ALIGN_PTR, 0); 1302 1303 return (0); 1304} 1305 1306#ifdef ICL_KERNEL_PROXY 1307static void 1308cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1309{ 1310 struct cfiscsi_session *cs; 1311 1312 cs = cfiscsi_session_new(&cfiscsi_softc); 1313 if (cs == NULL) { 1314 CFISCSI_WARN("failed to create session"); 1315 return; 1316 } 1317 1318 icl_conn_handoff_sock(cs->cs_conn, so); 1319 cs->cs_initiator_sa = sa; 1320 cs->cs_portal_id = portal_id; 1321 cs->cs_waiting_for_ctld = true; 1322 cv_signal(&cfiscsi_softc.accept_cv); 1323} 1324#endif 1325 1326static void 1327cfiscsi_online(void *arg) 1328{ 1329 struct cfiscsi_softc *softc; 1330 struct cfiscsi_target *ct; 1331 int online; 1332 1333 ct = (struct cfiscsi_target *)arg; 1334 softc = ct->ct_softc; 1335 1336 mtx_lock(&softc->lock); 1337 if (ct->ct_online) { 1338 mtx_unlock(&softc->lock); 1339 return; 1340 } 1341 ct->ct_online = 1; 1342 online = softc->online++; 1343 mtx_unlock(&softc->lock); 1344 if (online > 0) 1345 return; 1346 1347#ifdef ICL_KERNEL_PROXY 1348 if (softc->listener != NULL) 1349 icl_listen_free(softc->listener); 1350 softc->listener = icl_listen_new(cfiscsi_accept); 1351#endif 1352} 1353 1354static void 1355cfiscsi_offline(void *arg) 1356{ 1357 struct cfiscsi_softc *softc; 1358 struct cfiscsi_target *ct; 1359 struct cfiscsi_session *cs; 1360 int online; 1361 1362 ct = (struct cfiscsi_target *)arg; 1363 softc = ct->ct_softc; 1364 1365 mtx_lock(&softc->lock); 1366 if (!ct->ct_online) { 1367 mtx_unlock(&softc->lock); 1368 return; 1369 } 1370 ct->ct_online = 0; 1371 online = --softc->online; 1372 1373 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1374 if (cs->cs_target == ct) 1375 cfiscsi_session_terminate(cs); 1376 } 1377 mtx_unlock(&softc->lock); 1378 if (online > 0) 1379 return; 1380 1381#ifdef ICL_KERNEL_PROXY 1382 icl_listen_free(softc->listener); 1383 softc->listener = NULL; 1384#endif 1385} 1386 1387static int 1388cfiscsi_info(void *arg, struct sbuf *sb) 1389{ 1390 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1391 int retval; 1392 1393 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1394 ct->ct_state); 1395 return (retval); 1396} 1397 1398static void 1399cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1400{ 1401 struct cfiscsi_softc *softc; 1402 struct cfiscsi_session *cs, *cs2; 1403 struct cfiscsi_target *ct; 1404 struct ctl_iscsi_handoff_params *cihp; 1405 int error; 1406 1407 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1408 softc = &cfiscsi_softc; 1409 1410 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1411 cihp->initiator_name, cihp->initiator_addr, 1412 cihp->target_name); 1413 1414 ct = cfiscsi_target_find(softc, cihp->target_name); 1415 if (ct == NULL) { 1416 ci->status = CTL_ISCSI_ERROR; 1417 snprintf(ci->error_str, sizeof(ci->error_str), 1418 "%s: target not found", __func__); 1419 return; 1420 } 1421 1422 if (ct->ct_online == 0) { 1423 ci->status = CTL_ISCSI_ERROR; 1424 snprintf(ci->error_str, sizeof(ci->error_str), 1425 "%s: port offline", __func__); 1426 cfiscsi_target_release(ct); 1427 return; 1428 } 1429 1430#ifdef ICL_KERNEL_PROXY 1431 if (cihp->socket > 0 && cihp->connection_id > 0) { 1432 snprintf(ci->error_str, sizeof(ci->error_str), 1433 "both socket and connection_id set"); 1434 ci->status = CTL_ISCSI_ERROR; 1435 cfiscsi_target_release(ct); 1436 return; 1437 } 1438 if (cihp->socket == 0) { 1439 mtx_lock(&cfiscsi_softc.lock); 1440 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1441 if (cs->cs_id == cihp->socket) 1442 break; 1443 } 1444 if (cs == NULL) { 1445 mtx_unlock(&cfiscsi_softc.lock); 1446 snprintf(ci->error_str, sizeof(ci->error_str), 1447 "connection not found"); 1448 ci->status = CTL_ISCSI_ERROR; 1449 cfiscsi_target_release(ct); 1450 return; 1451 } 1452 mtx_unlock(&cfiscsi_softc.lock); 1453 } else { 1454#endif 1455 cs = cfiscsi_session_new(softc); 1456 if (cs == NULL) { 1457 ci->status = CTL_ISCSI_ERROR; 1458 snprintf(ci->error_str, sizeof(ci->error_str), 1459 "%s: cfiscsi_session_new failed", __func__); 1460 cfiscsi_target_release(ct); 1461 return; 1462 } 1463#ifdef ICL_KERNEL_PROXY 1464 } 1465#endif 1466 cs->cs_target = ct; 1467 1468 /* 1469 * First PDU of Full Feature phase has the same CmdSN as the last 1470 * PDU from the Login Phase received from the initiator. Thus, 1471 * the -1 below. 1472 */ 1473 cs->cs_portal_group_tag = cihp->portal_group_tag; 1474 cs->cs_cmdsn = cihp->cmdsn; 1475 cs->cs_statsn = cihp->statsn; 1476 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1477 cs->cs_max_burst_length = cihp->max_burst_length; 1478 cs->cs_immediate_data = !!cihp->immediate_data; 1479 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1480 cs->cs_conn->ic_header_crc32c = true; 1481 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1482 cs->cs_conn->ic_data_crc32c = true; 1483 1484 strlcpy(cs->cs_initiator_name, 1485 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1486 strlcpy(cs->cs_initiator_addr, 1487 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1488 strlcpy(cs->cs_initiator_alias, 1489 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1490 memcpy(cs->cs_initiator_isid, 1491 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1492 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1493 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1494 cihp->initiator_isid[0], cihp->initiator_isid[1], 1495 cihp->initiator_isid[2], cihp->initiator_isid[3], 1496 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1497 1498 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1499restart: 1500 if (!cs->cs_terminating) { 1501 mtx_lock(&softc->lock); 1502 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1503 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1504 cs->cs_target == cs2->cs_target && 1505 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1506 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1507 cfiscsi_session_terminate(cs2); 1508 mtx_unlock(&softc->lock); 1509 pause("cfiscsi_reinstate", 1); 1510 goto restart; 1511 } 1512 } 1513 mtx_unlock(&softc->lock); 1514 } 1515 1516 /* 1517 * Register initiator with CTL. 1518 */ 1519 cfiscsi_session_register_initiator(cs); 1520 1521#ifdef ICL_KERNEL_PROXY 1522 if (cihp->socket > 0) { 1523#endif 1524 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1525 if (error != 0) { 1526 cfiscsi_session_terminate(cs); 1527 refcount_release(&cs->cs_outstanding_ctl_pdus); 1528 ci->status = CTL_ISCSI_ERROR; 1529 snprintf(ci->error_str, sizeof(ci->error_str), 1530 "%s: icl_conn_handoff failed with error %d", 1531 __func__, error); 1532 return; 1533 } 1534#ifdef ICL_KERNEL_PROXY 1535 } 1536#endif 1537 1538#ifdef ICL_KERNEL_PROXY 1539 cs->cs_login_phase = false; 1540 1541 /* 1542 * First PDU of the Full Feature phase has likely already arrived. 1543 * We have to pick it up and execute properly. 1544 */ 1545 if (cs->cs_login_pdu != NULL) { 1546 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1547 cfiscsi_pdu_handle(cs->cs_login_pdu); 1548 cs->cs_login_pdu = NULL; 1549 } 1550#endif 1551 1552 refcount_release(&cs->cs_outstanding_ctl_pdus); 1553 ci->status = CTL_ISCSI_OK; 1554} 1555 1556static void 1557cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1558{ 1559 struct ctl_iscsi_list_params *cilp; 1560 struct cfiscsi_session *cs; 1561 struct cfiscsi_softc *softc; 1562 struct sbuf *sb; 1563 int error; 1564 1565 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1566 softc = &cfiscsi_softc; 1567 1568 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1569 if (sb == NULL) { 1570 ci->status = CTL_ISCSI_ERROR; 1571 snprintf(ci->error_str, sizeof(ci->error_str), 1572 "Unable to allocate %d bytes for iSCSI session list", 1573 cilp->alloc_len); 1574 return; 1575 } 1576 1577 sbuf_printf(sb, "<ctlislist>\n"); 1578 mtx_lock(&softc->lock); 1579 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1580#ifdef ICL_KERNEL_PROXY 1581 if (cs->cs_target == NULL) 1582 continue; 1583#endif 1584 error = sbuf_printf(sb, "<connection id=\"%d\">" 1585 "<initiator>%s</initiator>" 1586 "<initiator_addr>%s</initiator_addr>" 1587 "<initiator_alias>%s</initiator_alias>" 1588 "<target>%s</target>" 1589 "<target_alias>%s</target_alias>" 1590 "<header_digest>%s</header_digest>" 1591 "<data_digest>%s</data_digest>" 1592 "<max_data_segment_length>%zd</max_data_segment_length>" 1593 "<immediate_data>%d</immediate_data>" 1594 "<iser>%d</iser>" 1595 "</connection>\n", 1596 cs->cs_id, 1597 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1598 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1599 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1600 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1601 cs->cs_max_data_segment_length, 1602 cs->cs_immediate_data, 1603 cs->cs_conn->ic_iser); 1604 if (error != 0) 1605 break; 1606 } 1607 mtx_unlock(&softc->lock); 1608 error = sbuf_printf(sb, "</ctlislist>\n"); 1609 if (error != 0) { 1610 sbuf_delete(sb); 1611 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1612 snprintf(ci->error_str, sizeof(ci->error_str), 1613 "Out of space, %d bytes is too small", cilp->alloc_len); 1614 return; 1615 } 1616 sbuf_finish(sb); 1617 1618 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1619 cilp->fill_len = sbuf_len(sb) + 1; 1620 ci->status = CTL_ISCSI_OK; 1621 sbuf_delete(sb); 1622} 1623 1624static void 1625cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1626{ 1627 struct icl_pdu *response; 1628 struct iscsi_bhs_asynchronous_message *bhsam; 1629 struct ctl_iscsi_terminate_params *citp; 1630 struct cfiscsi_session *cs; 1631 struct cfiscsi_softc *softc; 1632 int found = 0; 1633 1634 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1635 softc = &cfiscsi_softc; 1636 1637 mtx_lock(&softc->lock); 1638 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1639 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1640 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1641 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1642 continue; 1643 1644 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1645 if (response == NULL) { 1646 /* 1647 * Oh well. Just terminate the connection. 1648 */ 1649 } else { 1650 bhsam = (struct iscsi_bhs_asynchronous_message *) 1651 response->ip_bhs; 1652 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1653 bhsam->bhsam_flags = 0x80; 1654 bhsam->bhsam_0xffffffff = 0xffffffff; 1655 bhsam->bhsam_async_event = 1656 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1657 cfiscsi_pdu_queue(response); 1658 } 1659 cfiscsi_session_terminate(cs); 1660 found++; 1661 } 1662 mtx_unlock(&softc->lock); 1663 1664 if (found == 0) { 1665 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1666 snprintf(ci->error_str, sizeof(ci->error_str), 1667 "No matching connections found"); 1668 return; 1669 } 1670 1671 ci->status = CTL_ISCSI_OK; 1672} 1673 1674static void 1675cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1676{ 1677 struct icl_pdu *response; 1678 struct iscsi_bhs_asynchronous_message *bhsam; 1679 struct ctl_iscsi_logout_params *cilp; 1680 struct cfiscsi_session *cs; 1681 struct cfiscsi_softc *softc; 1682 int found = 0; 1683 1684 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1685 softc = &cfiscsi_softc; 1686 1687 mtx_lock(&softc->lock); 1688 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1689 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1690 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1691 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1692 continue; 1693 1694 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1695 if (response == NULL) { 1696 ci->status = CTL_ISCSI_ERROR; 1697 snprintf(ci->error_str, sizeof(ci->error_str), 1698 "Unable to allocate memory"); 1699 mtx_unlock(&softc->lock); 1700 return; 1701 } 1702 bhsam = 1703 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1704 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1705 bhsam->bhsam_flags = 0x80; 1706 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1707 bhsam->bhsam_parameter3 = htons(10); 1708 cfiscsi_pdu_queue(response); 1709 found++; 1710 } 1711 mtx_unlock(&softc->lock); 1712 1713 if (found == 0) { 1714 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1715 snprintf(ci->error_str, sizeof(ci->error_str), 1716 "No matching connections found"); 1717 return; 1718 } 1719 1720 ci->status = CTL_ISCSI_OK; 1721} 1722 1723#ifdef ICL_KERNEL_PROXY 1724static void 1725cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1726{ 1727 struct ctl_iscsi_listen_params *cilp; 1728 struct sockaddr *sa; 1729 int error; 1730 1731 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1732 1733 if (cfiscsi_softc.listener == NULL) { 1734 CFISCSI_DEBUG("no listener"); 1735 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1736 ci->status = CTL_ISCSI_ERROR; 1737 return; 1738 } 1739 1740 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1741 if (error != 0) { 1742 CFISCSI_DEBUG("getsockaddr, error %d", error); 1743 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1744 ci->status = CTL_ISCSI_ERROR; 1745 return; 1746 } 1747 1748 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1749 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1750 if (error != 0) { 1751 free(sa, M_SONAME); 1752 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1753 snprintf(ci->error_str, sizeof(ci->error_str), 1754 "icl_listen_add failed, error %d", error); 1755 ci->status = CTL_ISCSI_ERROR; 1756 return; 1757 } 1758 1759 ci->status = CTL_ISCSI_OK; 1760} 1761 1762static void 1763cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1764{ 1765 struct ctl_iscsi_accept_params *ciap; 1766 struct cfiscsi_session *cs; 1767 int error; 1768 1769 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1770 1771 mtx_lock(&cfiscsi_softc.lock); 1772 for (;;) { 1773 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1774 if (cs->cs_waiting_for_ctld) 1775 break; 1776 } 1777 if (cs != NULL) 1778 break; 1779 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1780 if (error != 0) { 1781 mtx_unlock(&cfiscsi_softc.lock); 1782 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1783 ci->status = CTL_ISCSI_ERROR; 1784 return; 1785 } 1786 } 1787 mtx_unlock(&cfiscsi_softc.lock); 1788 1789 cs->cs_waiting_for_ctld = false; 1790 cs->cs_login_phase = true; 1791 1792 ciap->connection_id = cs->cs_id; 1793 ciap->portal_id = cs->cs_portal_id; 1794 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1795 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1796 cs->cs_initiator_sa->sa_len); 1797 if (error != 0) { 1798 snprintf(ci->error_str, sizeof(ci->error_str), 1799 "copyout failed with error %d", error); 1800 ci->status = CTL_ISCSI_ERROR; 1801 return; 1802 } 1803 1804 ci->status = CTL_ISCSI_OK; 1805} 1806 1807static void 1808cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1809{ 1810 struct ctl_iscsi_send_params *cisp; 1811 struct cfiscsi_session *cs; 1812 struct icl_pdu *ip; 1813 size_t datalen; 1814 void *data; 1815 int error; 1816 1817 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1818 1819 mtx_lock(&cfiscsi_softc.lock); 1820 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1821 if (cs->cs_id == cisp->connection_id) 1822 break; 1823 } 1824 if (cs == NULL) { 1825 mtx_unlock(&cfiscsi_softc.lock); 1826 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1827 ci->status = CTL_ISCSI_ERROR; 1828 return; 1829 } 1830 mtx_unlock(&cfiscsi_softc.lock); 1831 1832#if 0 1833 if (cs->cs_login_phase == false) 1834 return (EBUSY); 1835#endif 1836 1837 if (cs->cs_terminating) { 1838 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1839 ci->status = CTL_ISCSI_ERROR; 1840 return; 1841 } 1842 1843 datalen = cisp->data_segment_len; 1844 /* 1845 * XXX 1846 */ 1847 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1848 if (datalen > 65535) { 1849 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1850 ci->status = CTL_ISCSI_ERROR; 1851 return; 1852 } 1853 if (datalen > 0) { 1854 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1855 error = copyin(cisp->data_segment, data, datalen); 1856 if (error != 0) { 1857 free(data, M_CFISCSI); 1858 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1859 ci->status = CTL_ISCSI_ERROR; 1860 return; 1861 } 1862 } 1863 1864 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1865 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1866 if (datalen > 0) { 1867 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1868 free(data, M_CFISCSI); 1869 } 1870 CFISCSI_SESSION_LOCK(cs); 1871 icl_pdu_queue(ip); 1872 CFISCSI_SESSION_UNLOCK(cs); 1873 ci->status = CTL_ISCSI_OK; 1874} 1875 1876static void 1877cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1878{ 1879 struct ctl_iscsi_receive_params *cirp; 1880 struct cfiscsi_session *cs; 1881 struct icl_pdu *ip; 1882 void *data; 1883 int error; 1884 1885 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1886 1887 mtx_lock(&cfiscsi_softc.lock); 1888 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1889 if (cs->cs_id == cirp->connection_id) 1890 break; 1891 } 1892 if (cs == NULL) { 1893 mtx_unlock(&cfiscsi_softc.lock); 1894 snprintf(ci->error_str, sizeof(ci->error_str), 1895 "connection not found"); 1896 ci->status = CTL_ISCSI_ERROR; 1897 return; 1898 } 1899 mtx_unlock(&cfiscsi_softc.lock); 1900 1901#if 0 1902 if (is->is_login_phase == false) 1903 return (EBUSY); 1904#endif 1905 1906 CFISCSI_SESSION_LOCK(cs); 1907 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1908 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1909 if (error != 0) { 1910 CFISCSI_SESSION_UNLOCK(cs); 1911 snprintf(ci->error_str, sizeof(ci->error_str), 1912 "interrupted by signal"); 1913 ci->status = CTL_ISCSI_ERROR; 1914 return; 1915 } 1916 } 1917 1918 if (cs->cs_terminating) { 1919 CFISCSI_SESSION_UNLOCK(cs); 1920 snprintf(ci->error_str, sizeof(ci->error_str), 1921 "connection terminating"); 1922 ci->status = CTL_ISCSI_ERROR; 1923 return; 1924 } 1925 ip = cs->cs_login_pdu; 1926 cs->cs_login_pdu = NULL; 1927 CFISCSI_SESSION_UNLOCK(cs); 1928 1929 if (ip->ip_data_len > cirp->data_segment_len) { 1930 icl_pdu_free(ip); 1931 snprintf(ci->error_str, sizeof(ci->error_str), 1932 "data segment too big"); 1933 ci->status = CTL_ISCSI_ERROR; 1934 return; 1935 } 1936 1937 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1938 if (ip->ip_data_len > 0) { 1939 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1940 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1941 copyout(data, cirp->data_segment, ip->ip_data_len); 1942 free(data, M_CFISCSI); 1943 } 1944 1945 icl_pdu_free(ip); 1946 ci->status = CTL_ISCSI_OK; 1947} 1948 1949#endif /* !ICL_KERNEL_PROXY */ 1950 1951static void 1952cfiscsi_ioctl_port_create(struct ctl_req *req) 1953{ 1954 struct cfiscsi_target *ct; 1955 struct ctl_port *port; 1956 const char *target, *alias, *tag; 1957 struct scsi_vpd_id_descriptor *desc; 1958 ctl_options_t opts; 1959 int retval, len, idlen; 1960 1961 ctl_init_opts(&opts, req->num_args, req->kern_args); 1962 target = ctl_get_opt(&opts, "cfiscsi_target"); 1963 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1964 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1965 if (target == NULL || tag == NULL) { 1966 req->status = CTL_LUN_ERROR; 1967 snprintf(req->error_str, sizeof(req->error_str), 1968 "Missing required argument"); 1969 ctl_free_opts(&opts); 1970 return; 1971 } 1972 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1973 if (ct == NULL) { 1974 req->status = CTL_LUN_ERROR; 1975 snprintf(req->error_str, sizeof(req->error_str), 1976 "failed to create target \"%s\"", target); 1977 ctl_free_opts(&opts); 1978 return; 1979 } 1980 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1981 req->status = CTL_LUN_ERROR; 1982 snprintf(req->error_str, sizeof(req->error_str), 1983 "target \"%s\" already exist", target); 1984 cfiscsi_target_release(ct); 1985 ctl_free_opts(&opts); 1986 return; 1987 } 1988 port = &ct->ct_port; 1989 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 1990 goto done; 1991 1992 port->frontend = &cfiscsi_frontend; 1993 port->port_type = CTL_PORT_ISCSI; 1994 /* XXX KDM what should the real number be here? */ 1995 port->num_requested_ctl_io = 4096; 1996 port->port_name = "iscsi"; 1997 port->virtual_port = strtoul(tag, NULL, 0); 1998 port->port_online = cfiscsi_online; 1999 port->port_offline = cfiscsi_offline; 2000 port->port_info = cfiscsi_info; 2001 port->onoff_arg = ct; 2002 port->lun_enable = cfiscsi_lun_enable; 2003 port->lun_disable = cfiscsi_lun_disable; 2004 port->lun_map = cfiscsi_lun_map; 2005 port->targ_lun_arg = ct; 2006 port->fe_datamove = cfiscsi_datamove; 2007 port->fe_done = cfiscsi_done; 2008 2009 /* XXX KDM what should we report here? */ 2010 /* XXX These should probably be fetched from CTL. */ 2011 port->max_targets = 1; 2012 port->max_target_id = 15; 2013 2014 port->options = opts; 2015 STAILQ_INIT(&opts); 2016 2017 /* Generate Port ID. */ 2018 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2019 idlen = roundup2(idlen, 4); 2020 len = sizeof(struct scsi_vpd_device_id) + idlen; 2021 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2022 M_CTL, M_WAITOK | M_ZERO); 2023 port->port_devid->len = len; 2024 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2025 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2026 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2027 SVPD_ID_TYPE_SCSI_NAME; 2028 desc->length = idlen; 2029 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2030 target, port->virtual_port); 2031 2032 /* Generate Target ID. */ 2033 idlen = strlen(target) + 1; 2034 idlen = roundup2(idlen, 4); 2035 len = sizeof(struct scsi_vpd_device_id) + idlen; 2036 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2037 M_CTL, M_WAITOK | M_ZERO); 2038 port->target_devid->len = len; 2039 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2040 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2041 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2042 SVPD_ID_TYPE_SCSI_NAME; 2043 desc->length = idlen; 2044 strlcpy(desc->identifier, target, idlen); 2045 2046 retval = ctl_port_register(port, /*master_SC*/ 1); 2047 if (retval != 0) { 2048 ctl_free_opts(&port->options); 2049 cfiscsi_target_release(ct); 2050 free(port->port_devid, M_CFISCSI); 2051 free(port->target_devid, M_CFISCSI); 2052 req->status = CTL_LUN_ERROR; 2053 snprintf(req->error_str, sizeof(req->error_str), 2054 "ctl_frontend_register() failed with error %d", retval); 2055 return; 2056 } 2057done: 2058 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2059 req->status = CTL_LUN_OK; 2060 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2061 sizeof(port->targ_port)); //XXX 2062} 2063 2064static void 2065cfiscsi_ioctl_port_remove(struct ctl_req *req) 2066{ 2067 struct cfiscsi_target *ct; 2068 const char *target; 2069 ctl_options_t opts; 2070 2071 ctl_init_opts(&opts, req->num_args, req->kern_args); 2072 target = ctl_get_opt(&opts, "cfiscsi_target"); 2073 if (target == NULL) { 2074 ctl_free_opts(&opts); 2075 req->status = CTL_LUN_ERROR; 2076 snprintf(req->error_str, sizeof(req->error_str), 2077 "Missing required argument"); 2078 return; 2079 } 2080 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2081 if (ct == NULL) { 2082 ctl_free_opts(&opts); 2083 req->status = CTL_LUN_ERROR; 2084 snprintf(req->error_str, sizeof(req->error_str), 2085 "can't find target \"%s\"", target); 2086 return; 2087 } 2088 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2089 ctl_free_opts(&opts); 2090 req->status = CTL_LUN_ERROR; 2091 snprintf(req->error_str, sizeof(req->error_str), 2092 "target \"%s\" is already dying", target); 2093 return; 2094 } 2095 ctl_free_opts(&opts); 2096 2097 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2098 ctl_port_offline(&ct->ct_port); 2099 cfiscsi_target_release(ct); 2100 cfiscsi_target_release(ct); 2101} 2102 2103static int 2104cfiscsi_ioctl(struct cdev *dev, 2105 u_long cmd, caddr_t addr, int flag, struct thread *td) 2106{ 2107 struct ctl_iscsi *ci; 2108 struct ctl_req *req; 2109 2110 if (cmd == CTL_PORT_REQ) { 2111 req = (struct ctl_req *)addr; 2112 switch (req->reqtype) { 2113 case CTL_REQ_CREATE: 2114 cfiscsi_ioctl_port_create(req); 2115 break; 2116 case CTL_REQ_REMOVE: 2117 cfiscsi_ioctl_port_remove(req); 2118 break; 2119 default: 2120 req->status = CTL_LUN_ERROR; 2121 snprintf(req->error_str, sizeof(req->error_str), 2122 "Unsupported request type %d", req->reqtype); 2123 } 2124 return (0); 2125 } 2126 2127 if (cmd != CTL_ISCSI) 2128 return (ENOTTY); 2129 2130 ci = (struct ctl_iscsi *)addr; 2131 switch (ci->type) { 2132 case CTL_ISCSI_HANDOFF: 2133 cfiscsi_ioctl_handoff(ci); 2134 break; 2135 case CTL_ISCSI_LIST: 2136 cfiscsi_ioctl_list(ci); 2137 break; 2138 case CTL_ISCSI_TERMINATE: 2139 cfiscsi_ioctl_terminate(ci); 2140 break; 2141 case CTL_ISCSI_LOGOUT: 2142 cfiscsi_ioctl_logout(ci); 2143 break; 2144#ifdef ICL_KERNEL_PROXY 2145 case CTL_ISCSI_LISTEN: 2146 cfiscsi_ioctl_listen(ci); 2147 break; 2148 case CTL_ISCSI_ACCEPT: 2149 cfiscsi_ioctl_accept(ci); 2150 break; 2151 case CTL_ISCSI_SEND: 2152 cfiscsi_ioctl_send(ci); 2153 break; 2154 case CTL_ISCSI_RECEIVE: 2155 cfiscsi_ioctl_receive(ci); 2156 break; 2157#else 2158 case CTL_ISCSI_LISTEN: 2159 case CTL_ISCSI_ACCEPT: 2160 case CTL_ISCSI_SEND: 2161 case CTL_ISCSI_RECEIVE: 2162 ci->status = CTL_ISCSI_ERROR; 2163 snprintf(ci->error_str, sizeof(ci->error_str), 2164 "%s: CTL compiled without ICL_KERNEL_PROXY", 2165 __func__); 2166 break; 2167#endif /* !ICL_KERNEL_PROXY */ 2168 default: 2169 ci->status = CTL_ISCSI_ERROR; 2170 snprintf(ci->error_str, sizeof(ci->error_str), 2171 "%s: invalid iSCSI request type %d", __func__, ci->type); 2172 break; 2173 } 2174 2175 return (0); 2176} 2177 2178static void 2179cfiscsi_target_hold(struct cfiscsi_target *ct) 2180{ 2181 2182 refcount_acquire(&ct->ct_refcount); 2183} 2184 2185static void 2186cfiscsi_target_release(struct cfiscsi_target *ct) 2187{ 2188 struct cfiscsi_softc *softc; 2189 2190 softc = ct->ct_softc; 2191 mtx_lock(&softc->lock); 2192 if (refcount_release(&ct->ct_refcount)) { 2193 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2194 mtx_unlock(&softc->lock); 2195 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2196 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2197 if (ctl_port_deregister(&ct->ct_port) != 0) 2198 printf("%s: ctl_port_deregister() failed\n", 2199 __func__); 2200 } 2201 free(ct, M_CFISCSI); 2202 2203 return; 2204 } 2205 mtx_unlock(&softc->lock); 2206} 2207 2208static struct cfiscsi_target * 2209cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2210{ 2211 struct cfiscsi_target *ct; 2212 2213 mtx_lock(&softc->lock); 2214 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2215 if (strcmp(name, ct->ct_name) != 0 || 2216 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2217 continue; 2218 cfiscsi_target_hold(ct); 2219 mtx_unlock(&softc->lock); 2220 return (ct); 2221 } 2222 mtx_unlock(&softc->lock); 2223 2224 return (NULL); 2225} 2226 2227static struct cfiscsi_target * 2228cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2229 const char *alias) 2230{ 2231 struct cfiscsi_target *ct, *newct; 2232 int i; 2233 2234 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2235 return (NULL); 2236 2237 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2238 2239 mtx_lock(&softc->lock); 2240 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2241 if (strcmp(name, ct->ct_name) != 0 || 2242 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2243 continue; 2244 cfiscsi_target_hold(ct); 2245 mtx_unlock(&softc->lock); 2246 free(newct, M_CFISCSI); 2247 return (ct); 2248 } 2249 2250 for (i = 0; i < CTL_MAX_LUNS; i++) 2251 newct->ct_luns[i] = UINT32_MAX; 2252 2253 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2254 if (alias != NULL) 2255 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2256 refcount_init(&newct->ct_refcount, 1); 2257 newct->ct_softc = softc; 2258 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2259 mtx_unlock(&softc->lock); 2260 2261 return (newct); 2262} 2263 2264/* 2265 * Takes LUN from the target space and returns LUN from the CTL space. 2266 */ 2267static uint32_t 2268cfiscsi_lun_map(void *arg, uint32_t lun) 2269{ 2270 struct cfiscsi_target *ct = arg; 2271 2272 if (lun >= CTL_MAX_LUNS) { 2273 CFISCSI_DEBUG("requested lun number %d is higher " 2274 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2275 return (UINT32_MAX); 2276 } 2277 return (ct->ct_luns[lun]); 2278} 2279 2280static int 2281cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2282 unsigned long lun_id, unsigned long ctl_lun_id) 2283{ 2284 2285 if (lun_id >= CTL_MAX_LUNS) { 2286 CFISCSI_WARN("requested lun number %ld is higher " 2287 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2288 return (-1); 2289 } 2290 2291 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2292 /* 2293 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2294 * when the LUN is created, and a second time just before 2295 * the port is brought online; don't emit warnings 2296 * for that case. 2297 */ 2298 if (ct->ct_luns[lun_id] == ctl_lun_id) 2299 return (0); 2300 CFISCSI_WARN("lun %ld already allocated", lun_id); 2301 return (-1); 2302 } 2303 2304#if 0 2305 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2306 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2307#endif 2308 2309 ct->ct_luns[lun_id] = ctl_lun_id; 2310 2311 return (0); 2312} 2313 2314static int 2315cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2316{ 2317 struct cfiscsi_softc *softc; 2318 struct cfiscsi_target *ct; 2319 const char *target = NULL; 2320 const char *lun = NULL; 2321 unsigned long tmp; 2322 2323 ct = (struct cfiscsi_target *)arg; 2324 softc = ct->ct_softc; 2325 2326 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2327 "cfiscsi_target"); 2328 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2329 "cfiscsi_lun"); 2330 2331 if (target == NULL && lun == NULL) 2332 return (0); 2333 2334 if (target == NULL || lun == NULL) { 2335 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2336 "cfiscsi_lun, or the other way around; ignoring"); 2337 return (0); 2338 } 2339 2340 if (strcmp(target, ct->ct_name) != 0) 2341 return (0); 2342 2343 tmp = strtoul(lun, NULL, 10); 2344 cfiscsi_target_set_lun(ct, tmp, lun_id); 2345 return (0); 2346} 2347 2348static int 2349cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2350{ 2351 struct cfiscsi_softc *softc; 2352 struct cfiscsi_target *ct; 2353 int i; 2354 2355 ct = (struct cfiscsi_target *)arg; 2356 softc = ct->ct_softc; 2357 2358 mtx_lock(&softc->lock); 2359 for (i = 0; i < CTL_MAX_LUNS; i++) { 2360 if (ct->ct_luns[i] != lun_id) 2361 continue; 2362 ct->ct_luns[i] = UINT32_MAX; 2363 break; 2364 } 2365 mtx_unlock(&softc->lock); 2366 return (0); 2367} 2368 2369static void 2370cfiscsi_datamove_in(union ctl_io *io) 2371{ 2372 struct cfiscsi_session *cs; 2373 struct icl_pdu *request, *response; 2374 const struct iscsi_bhs_scsi_command *bhssc; 2375 struct iscsi_bhs_data_in *bhsdi; 2376 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2377 size_t len, expected_len, sg_len, buffer_offset; 2378 const char *sg_addr; 2379 int ctl_sg_count, error, i; 2380 2381 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2382 cs = PDU_SESSION(request); 2383 2384 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2385 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2386 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2387 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2388 2389 if (io->scsiio.kern_sg_entries > 0) { 2390 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2391 ctl_sg_count = io->scsiio.kern_sg_entries; 2392 } else { 2393 ctl_sglist = &ctl_sg_entry; 2394 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2395 ctl_sglist->len = io->scsiio.kern_data_len; 2396 ctl_sg_count = 1; 2397 } 2398 2399 /* 2400 * This is the total amount of data to be transferred within the current 2401 * SCSI command. We need to record it so that we can properly report 2402 * underflow/underflow. 2403 */ 2404 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2405 2406 /* 2407 * This is the offset within the current SCSI command; for the first 2408 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2409 * it will be the sum of lengths of previous ones. 2410 */ 2411 buffer_offset = io->scsiio.kern_rel_offset; 2412 2413 /* 2414 * This is the transfer length expected by the initiator. In theory, 2415 * it could be different from the correct amount of data from the SCSI 2416 * point of view, even if that doesn't make any sense. 2417 */ 2418 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2419#if 0 2420 if (expected_len != io->scsiio.kern_total_len) { 2421 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2422 "actual length %zd", expected_len, 2423 (size_t)io->scsiio.kern_total_len); 2424 } 2425#endif 2426 2427 if (buffer_offset >= expected_len) { 2428#if 0 2429 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2430 "already sent the expected len", buffer_offset); 2431#endif 2432 io->scsiio.be_move_done(io); 2433 return; 2434 } 2435 2436 i = 0; 2437 sg_addr = NULL; 2438 sg_len = 0; 2439 response = NULL; 2440 bhsdi = NULL; 2441 for (;;) { 2442 if (response == NULL) { 2443 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2444 if (response == NULL) { 2445 CFISCSI_SESSION_WARN(cs, "failed to " 2446 "allocate memory; dropping connection"); 2447 ctl_set_busy(&io->scsiio); 2448 io->scsiio.be_move_done(io); 2449 cfiscsi_session_terminate(cs); 2450 return; 2451 } 2452 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2453 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2454 bhsdi->bhsdi_initiator_task_tag = 2455 bhssc->bhssc_initiator_task_tag; 2456 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2457 PDU_EXPDATASN(request)++; 2458 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2459 } 2460 2461 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2462 if (sg_len == 0) { 2463 sg_addr = ctl_sglist[i].addr; 2464 sg_len = ctl_sglist[i].len; 2465 KASSERT(sg_len > 0, ("sg_len <= 0")); 2466 } 2467 2468 len = sg_len; 2469 2470 /* 2471 * Truncate to maximum data segment length. 2472 */ 2473 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2474 ("ip_data_len %zd >= max_data_segment_length %zd", 2475 response->ip_data_len, cs->cs_max_data_segment_length)); 2476 if (response->ip_data_len + len > 2477 cs->cs_max_data_segment_length) { 2478 len = cs->cs_max_data_segment_length - 2479 response->ip_data_len; 2480 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2481 len, sg_len)); 2482 } 2483 2484 /* 2485 * Truncate to expected data transfer length. 2486 */ 2487 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2488 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2489 buffer_offset, response->ip_data_len, expected_len)); 2490 if (buffer_offset + response->ip_data_len + len > expected_len) { 2491 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2492 "to expected data transfer length %zd", 2493 buffer_offset + response->ip_data_len + len, expected_len); 2494 len = expected_len - (buffer_offset + response->ip_data_len); 2495 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2496 len, sg_len)); 2497 } 2498 2499 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2500 if (error != 0) { 2501 CFISCSI_SESSION_WARN(cs, "failed to " 2502 "allocate memory; dropping connection"); 2503 icl_pdu_free(response); 2504 ctl_set_busy(&io->scsiio); 2505 io->scsiio.be_move_done(io); 2506 cfiscsi_session_terminate(cs); 2507 return; 2508 } 2509 sg_addr += len; 2510 sg_len -= len; 2511 2512 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2513 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2514 buffer_offset, response->ip_data_len, expected_len)); 2515 if (buffer_offset + response->ip_data_len == expected_len) { 2516 /* 2517 * Already have the amount of data the initiator wanted. 2518 */ 2519 break; 2520 } 2521 2522 if (sg_len == 0) { 2523 /* 2524 * End of scatter-gather segment; 2525 * proceed to the next one... 2526 */ 2527 if (i == ctl_sg_count - 1) { 2528 /* 2529 * ... unless this was the last one. 2530 */ 2531 break; 2532 } 2533 i++; 2534 } 2535 2536 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2537 /* 2538 * Can't stuff more data into the current PDU; 2539 * queue it. Note that's not enough to check 2540 * for kern_data_resid == 0 instead; there 2541 * may be several Data-In PDUs for the final 2542 * call to cfiscsi_datamove(), and we want 2543 * to set the F flag only on the last of them. 2544 */ 2545 buffer_offset += response->ip_data_len; 2546 if (buffer_offset == io->scsiio.kern_total_len || 2547 buffer_offset == expected_len) 2548 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2549 cfiscsi_pdu_queue(response); 2550 response = NULL; 2551 bhsdi = NULL; 2552 } 2553 } 2554 if (response != NULL) { 2555 buffer_offset += response->ip_data_len; 2556 if (buffer_offset == io->scsiio.kern_total_len || 2557 buffer_offset == expected_len) 2558 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2559 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2560 cfiscsi_pdu_queue(response); 2561 } 2562 2563 io->scsiio.be_move_done(io); 2564} 2565 2566static void 2567cfiscsi_datamove_out(union ctl_io *io) 2568{ 2569 struct cfiscsi_session *cs; 2570 struct icl_pdu *request, *response; 2571 const struct iscsi_bhs_scsi_command *bhssc; 2572 struct iscsi_bhs_r2t *bhsr2t; 2573 struct cfiscsi_data_wait *cdw; 2574 uint32_t target_transfer_tag; 2575 bool done; 2576 2577 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2578 cs = PDU_SESSION(request); 2579 2580 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2581 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2582 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2583 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2584 2585 /* 2586 * We need to record it so that we can properly report 2587 * underflow/underflow. 2588 */ 2589 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2590 2591 /* 2592 * We hadn't received anything during this datamove yet. 2593 */ 2594 io->scsiio.ext_data_filled = 0; 2595 2596 target_transfer_tag = 2597 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2598 2599#if 0 2600 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2601 "task tag 0x%x, target transfer tag 0x%x", 2602 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2603#endif 2604 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2605 if (cdw == NULL) { 2606 CFISCSI_SESSION_WARN(cs, "failed to " 2607 "allocate memory; dropping connection"); 2608 ctl_set_busy(&io->scsiio); 2609 io->scsiio.be_move_done(io); 2610 cfiscsi_session_terminate(cs); 2611 return; 2612 } 2613 cdw->cdw_ctl_io = io; 2614 cdw->cdw_target_transfer_tag = target_transfer_tag; 2615 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2616 2617 if (cs->cs_immediate_data && io->scsiio.kern_rel_offset < 2618 icl_pdu_data_segment_length(request)) { 2619 done = cfiscsi_handle_data_segment(request, cdw); 2620 if (done) { 2621 uma_zfree(cfiscsi_data_wait_zone, cdw); 2622 io->scsiio.be_move_done(io); 2623 return; 2624 } 2625 } 2626 2627 CFISCSI_SESSION_LOCK(cs); 2628 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2629 CFISCSI_SESSION_UNLOCK(cs); 2630 2631 /* 2632 * XXX: We should limit the number of outstanding R2T PDUs 2633 * per task to MaxOutstandingR2T. 2634 */ 2635 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2636 if (response == NULL) { 2637 CFISCSI_SESSION_WARN(cs, "failed to " 2638 "allocate memory; dropping connection"); 2639 ctl_set_busy(&io->scsiio); 2640 io->scsiio.be_move_done(io); 2641 cfiscsi_session_terminate(cs); 2642 return; 2643 } 2644 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2645 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2646 bhsr2t->bhsr2t_flags = 0x80; 2647 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2648 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2649 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2650 /* 2651 * XXX: Here we assume that cfiscsi_datamove() won't ever 2652 * be running concurrently on several CPUs for a given 2653 * command. 2654 */ 2655 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2656 PDU_R2TSN(request)++; 2657 /* 2658 * This is the offset within the current SCSI command; 2659 * i.e. for the first call of datamove(), it will be 0, 2660 * and for subsequent ones it will be the sum of lengths 2661 * of previous ones. 2662 * 2663 * The ext_data_filled is to account for unsolicited 2664 * (immediate) data that might have already arrived. 2665 */ 2666 bhsr2t->bhsr2t_buffer_offset = 2667 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2668 /* 2669 * This is the total length (sum of S/G lengths) this call 2670 * to cfiscsi_datamove() is supposed to handle. 2671 * 2672 * XXX: Limit it to MaxBurstLength. 2673 */ 2674 bhsr2t->bhsr2t_desired_data_transfer_length = 2675 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2676 cfiscsi_pdu_queue(response); 2677} 2678 2679static void 2680cfiscsi_datamove(union ctl_io *io) 2681{ 2682 2683 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2684 cfiscsi_datamove_in(io); 2685 else 2686 cfiscsi_datamove_out(io); 2687} 2688 2689static void 2690cfiscsi_scsi_command_done(union ctl_io *io) 2691{ 2692 struct icl_pdu *request, *response; 2693 struct iscsi_bhs_scsi_command *bhssc; 2694 struct iscsi_bhs_scsi_response *bhssr; 2695#ifdef DIAGNOSTIC 2696 struct cfiscsi_data_wait *cdw; 2697#endif 2698 struct cfiscsi_session *cs; 2699 uint16_t sense_length; 2700 2701 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2702 cs = PDU_SESSION(request); 2703 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2704 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2705 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2706 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2707 2708 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2709 // bhssc->bhssc_initiator_task_tag); 2710 2711#ifdef DIAGNOSTIC 2712 CFISCSI_SESSION_LOCK(cs); 2713 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2714 KASSERT(bhssc->bhssc_initiator_task_tag != 2715 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2716 CFISCSI_SESSION_UNLOCK(cs); 2717#endif 2718 2719 /* 2720 * Do not return status for aborted commands. 2721 * There are exceptions, but none supported by CTL yet. 2722 */ 2723 if ((io->io_hdr.flags & CTL_FLAG_ABORT) && 2724 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) { 2725 ctl_free_io(io); 2726 icl_pdu_free(request); 2727 return; 2728 } 2729 2730 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2731 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2732 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2733 bhssr->bhssr_flags = 0x80; 2734 /* 2735 * XXX: We don't deal with bidirectional under/overflows; 2736 * does anything actually support those? 2737 */ 2738 if (PDU_TOTAL_TRANSFER_LEN(request) < 2739 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2740 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2741 bhssr->bhssr_residual_count = 2742 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2743 PDU_TOTAL_TRANSFER_LEN(request)); 2744 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2745 // ntohl(bhssr->bhssr_residual_count)); 2746 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2747 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2748 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2749 bhssr->bhssr_residual_count = 2750 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2751 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2752 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2753 // ntohl(bhssr->bhssr_residual_count)); 2754 } 2755 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2756 bhssr->bhssr_status = io->scsiio.scsi_status; 2757 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2758 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2759 2760 if (io->scsiio.sense_len > 0) { 2761#if 0 2762 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2763 io->scsiio.sense_len); 2764#endif 2765 sense_length = htons(io->scsiio.sense_len); 2766 icl_pdu_append_data(response, 2767 &sense_length, sizeof(sense_length), M_WAITOK); 2768 icl_pdu_append_data(response, 2769 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2770 } 2771 2772 ctl_free_io(io); 2773 icl_pdu_free(request); 2774 cfiscsi_pdu_queue(response); 2775} 2776 2777static void 2778cfiscsi_task_management_done(union ctl_io *io) 2779{ 2780 struct icl_pdu *request, *response; 2781 struct iscsi_bhs_task_management_request *bhstmr; 2782 struct iscsi_bhs_task_management_response *bhstmr2; 2783 struct cfiscsi_data_wait *cdw, *tmpcdw; 2784 struct cfiscsi_session *cs; 2785 2786 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2787 cs = PDU_SESSION(request); 2788 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2789 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2790 ISCSI_BHS_OPCODE_TASK_REQUEST, 2791 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2792 2793#if 0 2794 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2795 bhstmr->bhstmr_initiator_task_tag, 2796 bhstmr->bhstmr_referenced_task_tag); 2797#endif 2798 2799 if ((bhstmr->bhstmr_function & ~0x80) == 2800 BHSTMR_FUNCTION_ABORT_TASK) { 2801 /* 2802 * Make sure we no longer wait for Data-Out for this command. 2803 */ 2804 CFISCSI_SESSION_LOCK(cs); 2805 TAILQ_FOREACH_SAFE(cdw, 2806 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2807 if (bhstmr->bhstmr_referenced_task_tag != 2808 cdw->cdw_initiator_task_tag) 2809 continue; 2810 2811#if 0 2812 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2813 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2814#endif 2815 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2816 cdw, cdw_next); 2817 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2818 uma_zfree(cfiscsi_data_wait_zone, cdw); 2819 } 2820 CFISCSI_SESSION_UNLOCK(cs); 2821 } 2822 2823 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2824 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2825 response->ip_bhs; 2826 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2827 bhstmr2->bhstmr_flags = 0x80; 2828 if (io->io_hdr.status == CTL_SUCCESS) { 2829 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2830 } else { 2831 /* 2832 * XXX: How to figure out what exactly went wrong? iSCSI spec 2833 * expects us to provide detailed error, e.g. "Task does 2834 * not exist" or "LUN does not exist". 2835 */ 2836 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2837 bhstmr2->bhstmr_response = 2838 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2839 } 2840 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2841 2842 ctl_free_io(io); 2843 icl_pdu_free(request); 2844 cfiscsi_pdu_queue(response); 2845} 2846 2847static void 2848cfiscsi_done(union ctl_io *io) 2849{ 2850 struct icl_pdu *request; 2851 struct cfiscsi_session *cs; 2852 2853 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2854 ("invalid CTL status %#x", io->io_hdr.status)); 2855 2856 if (io->io_hdr.io_type == CTL_IO_TASK && 2857 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2858 /* 2859 * Implicit task termination has just completed; nothing to do. 2860 */ 2861 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2862 cs->cs_tasks_aborted = true; 2863 refcount_release(&cs->cs_outstanding_ctl_pdus); 2864 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2865 ctl_free_io(io); 2866 return; 2867 } 2868 2869 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2870 cs = PDU_SESSION(request); 2871 refcount_release(&cs->cs_outstanding_ctl_pdus); 2872 2873 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2874 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2875 cfiscsi_scsi_command_done(io); 2876 break; 2877 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2878 cfiscsi_task_management_done(io); 2879 break; 2880 default: 2881 panic("cfiscsi_done called with wrong opcode 0x%x", 2882 request->ip_bhs->bhs_opcode); 2883 } 2884} 2885