ctl_frontend_iscsi.c revision 267481
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 267481 2014-06-14 17:47:44Z mav $ 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 267481 2014-06-14 17:47:44Z mav $"); 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 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_targ_enable(void *arg, struct ctl_id targ_id); 153static int cfiscsi_targ_disable(void *arg, struct ctl_id targ_id); 154static int cfiscsi_lun_enable(void *arg, 155 struct ctl_id target_id, int lun_id); 156static int cfiscsi_lun_disable(void *arg, 157 struct ctl_id target_id, int lun_id); 158static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160static int cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len); 161static void cfiscsi_datamove(union ctl_io *io); 162static void cfiscsi_done(union ctl_io *io); 163static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun); 164static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 165static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 168static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 169static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 170static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 171static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 172 *softc, const char *name); 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 int cfiscsi_module_event_handler(module_t, int /*modeventtype_t*/, void *); 180 181static moduledata_t cfiscsi_moduledata = { 182 "ctlcfiscsi", 183 cfiscsi_module_event_handler, 184 NULL 185}; 186 187DECLARE_MODULE(ctlcfiscsi, cfiscsi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH); 188MODULE_VERSION(ctlcfiscsi, 1); 189MODULE_DEPEND(ctlcfiscsi, ctl, 1, 1, 1); 190MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 191 192static struct icl_pdu * 193cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 194{ 195 196 return (icl_pdu_new_bhs(request->ip_conn, flags)); 197} 198 199static bool 200cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 201{ 202 const struct iscsi_bhs_scsi_command *bhssc; 203 struct cfiscsi_session *cs; 204 uint32_t cmdsn, expstatsn; 205 206 cs = PDU_SESSION(request); 207 208 /* 209 * Every incoming PDU - not just NOP-Out - resets the ping timer. 210 * The purpose of the timeout is to reset the connection when it stalls; 211 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 212 * in some queue. 213 * 214 * XXX: Locking? 215 */ 216 cs->cs_timeout = 0; 217 218 /* 219 * Data-Out PDUs don't contain CmdSN. 220 */ 221 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 222 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 223 return (false); 224 225 /* 226 * We're only using fields common for all the request 227 * (initiator -> target) PDUs. 228 */ 229 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 230 cmdsn = ntohl(bhssc->bhssc_cmdsn); 231 expstatsn = ntohl(bhssc->bhssc_expstatsn); 232 233 CFISCSI_SESSION_LOCK(cs); 234#if 0 235 if (expstatsn != cs->cs_statsn) { 236 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 237 "while current StatSN is %d", expstatsn, 238 cs->cs_statsn); 239 } 240#endif 241 242 /* 243 * The target MUST silently ignore any non-immediate command outside 244 * of this range. 245 */ 246 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 247 CFISCSI_SESSION_UNLOCK(cs); 248 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 249 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 250 return (true); 251 } 252 253 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 254 cs->cs_cmdsn++; 255 256 CFISCSI_SESSION_UNLOCK(cs); 257 258 return (false); 259} 260 261static void 262cfiscsi_pdu_handle(struct icl_pdu *request) 263{ 264 struct cfiscsi_session *cs; 265 bool ignore; 266 267 cs = PDU_SESSION(request); 268 269 ignore = cfiscsi_pdu_update_cmdsn(request); 270 if (ignore) { 271 icl_pdu_free(request); 272 return; 273 } 274 275 /* 276 * Handle the PDU; this includes e.g. receiving the remaining 277 * part of PDU and submitting the SCSI command to CTL 278 * or queueing a reply. The handling routine is responsible 279 * for freeing the PDU when it's no longer needed. 280 */ 281 switch (request->ip_bhs->bhs_opcode & 282 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 283 case ISCSI_BHS_OPCODE_NOP_OUT: 284 cfiscsi_pdu_handle_nop_out(request); 285 break; 286 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 287 cfiscsi_pdu_handle_scsi_command(request); 288 break; 289 case ISCSI_BHS_OPCODE_TASK_REQUEST: 290 cfiscsi_pdu_handle_task_request(request); 291 break; 292 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 293 cfiscsi_pdu_handle_data_out(request); 294 break; 295 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 296 cfiscsi_pdu_handle_logout_request(request); 297 break; 298 default: 299 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 300 "opcode 0x%x; dropping connection", 301 request->ip_bhs->bhs_opcode); 302 icl_pdu_free(request); 303 cfiscsi_session_terminate(cs); 304 } 305 306} 307 308static void 309cfiscsi_receive_callback(struct icl_pdu *request) 310{ 311 struct cfiscsi_session *cs; 312 313 cs = PDU_SESSION(request); 314 315#ifdef ICL_KERNEL_PROXY 316 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 317 if (cs->cs_login_pdu == NULL) 318 cs->cs_login_pdu = request; 319 else 320 icl_pdu_free(request); 321 cv_signal(&cs->cs_login_cv); 322 return; 323 } 324#endif 325 326 cfiscsi_pdu_handle(request); 327} 328 329static void 330cfiscsi_error_callback(struct icl_conn *ic) 331{ 332 struct cfiscsi_session *cs; 333 334 cs = CONN_SESSION(ic); 335 336 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 337 cfiscsi_session_terminate(cs); 338} 339 340static int 341cfiscsi_pdu_prepare(struct icl_pdu *response) 342{ 343 struct cfiscsi_session *cs; 344 struct iscsi_bhs_scsi_response *bhssr; 345 bool advance_statsn = true; 346 347 cs = PDU_SESSION(response); 348 349 CFISCSI_SESSION_LOCK_ASSERT(cs); 350 351 /* 352 * We're only using fields common for all the response 353 * (target -> initiator) PDUs. 354 */ 355 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 356 357 /* 358 * 10.8.3: "The StatSN for this connection is not advanced 359 * after this PDU is sent." 360 */ 361 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 362 advance_statsn = false; 363 364 /* 365 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 366 * StatSN for the connection is not advanced after this PDU is sent." 367 */ 368 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 369 bhssr->bhssr_initiator_task_tag == 0xffffffff) 370 advance_statsn = false; 371 372 /* 373 * See the comment below - StatSN is not meaningful and must 374 * not be advanced. 375 */ 376 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 377 advance_statsn = false; 378 379 /* 380 * 10.7.3: "The fields StatSN, Status, and Residual Count 381 * only have meaningful content if the S bit is set to 1." 382 */ 383 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 384 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 385 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 386 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 387 388 if (advance_statsn) 389 cs->cs_statsn++; 390 391 return (0); 392} 393 394static void 395cfiscsi_pdu_queue(struct icl_pdu *response) 396{ 397 struct cfiscsi_session *cs; 398 399 cs = PDU_SESSION(response); 400 401 CFISCSI_SESSION_LOCK(cs); 402 cfiscsi_pdu_prepare(response); 403 icl_pdu_queue(response); 404 CFISCSI_SESSION_UNLOCK(cs); 405} 406 407static uint32_t 408cfiscsi_decode_lun(uint64_t encoded) 409{ 410 uint8_t lun[8]; 411 uint32_t result; 412 413 /* 414 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 415 * but is in fact an evil, multidimensional structure defined 416 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 417 */ 418 memcpy(lun, &encoded, sizeof(lun)); 419 switch (lun[0] & 0xC0) { 420 case 0x00: 421 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 422 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 423 CFISCSI_WARN("malformed LUN " 424 "(peripheral device addressing method): 0x%jx", 425 (uintmax_t)encoded); 426 result = 0xffffffff; 427 break; 428 } 429 result = lun[1]; 430 break; 431 case 0x40: 432 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 433 lun[6] != 0 || lun[7] != 0) { 434 CFISCSI_WARN("malformed LUN " 435 "(flat address space addressing method): 0x%jx", 436 (uintmax_t)encoded); 437 result = 0xffffffff; 438 break; 439 } 440 result = ((lun[0] & 0x3f) << 8) + lun[1]; 441 break; 442 case 0xC0: 443 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 444 lun[6] != 0 || lun[7] != 0) { 445 CFISCSI_WARN("malformed LUN (extended flat " 446 "address space addressing method): 0x%jx", 447 (uintmax_t)encoded); 448 result = 0xffffffff; 449 break; 450 } 451 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 452 default: 453 CFISCSI_WARN("unsupported LUN format 0x%jx", 454 (uintmax_t)encoded); 455 result = 0xffffffff; 456 break; 457 } 458 459 return (result); 460} 461 462static void 463cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 464{ 465 struct cfiscsi_session *cs; 466 struct iscsi_bhs_nop_out *bhsno; 467 struct iscsi_bhs_nop_in *bhsni; 468 struct icl_pdu *response; 469 void *data = NULL; 470 size_t datasize; 471 int error; 472 473 cs = PDU_SESSION(request); 474 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 475 476 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 477 /* 478 * Nothing to do, iscsi_pdu_update_statsn() already 479 * zeroed the timeout. 480 */ 481 icl_pdu_free(request); 482 return; 483 } 484 485 datasize = icl_pdu_data_segment_length(request); 486 if (datasize > 0) { 487 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 488 if (data == NULL) { 489 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 490 "dropping connection"); 491 icl_pdu_free(request); 492 cfiscsi_session_terminate(cs); 493 return; 494 } 495 icl_pdu_get_data(request, 0, data, datasize); 496 } 497 498 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 499 if (response == NULL) { 500 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 501 "droppping connection"); 502 free(data, M_CFISCSI); 503 icl_pdu_free(request); 504 cfiscsi_session_terminate(cs); 505 return; 506 } 507 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 508 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 509 bhsni->bhsni_flags = 0x80; 510 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 511 bhsni->bhsni_target_transfer_tag = 0xffffffff; 512 if (datasize > 0) { 513 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 514 if (error != 0) { 515 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 516 "dropping connection"); 517 free(data, M_CFISCSI); 518 icl_pdu_free(request); 519 icl_pdu_free(response); 520 cfiscsi_session_terminate(cs); 521 return; 522 } 523 free(data, M_CFISCSI); 524 } 525 526 icl_pdu_free(request); 527 cfiscsi_pdu_queue(response); 528} 529 530static void 531cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 532{ 533 struct iscsi_bhs_scsi_command *bhssc; 534 struct cfiscsi_session *cs; 535 union ctl_io *io; 536 int error; 537 538 cs = PDU_SESSION(request); 539 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 540 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 541 // bhssc->bhssc_initiator_task_tag); 542 543 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 544 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 545 "ImmediateData=No; dropping connection"); 546 icl_pdu_free(request); 547 cfiscsi_session_terminate(cs); 548 return; 549 } 550 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 551 if (io == NULL) { 552 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 553 "dropping connection"); 554 icl_pdu_free(request); 555 cfiscsi_session_terminate(cs); 556 return; 557 } 558 ctl_zero_io(io); 559 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 560 io->io_hdr.io_type = CTL_IO_SCSI; 561 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 562 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 563 io->io_hdr.nexus.targ_target.id = 0; 564 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 565 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 566 io->io_hdr.nexus.lun_map_arg = cs; 567 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 568 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 569 case BHSSC_FLAGS_ATTR_UNTAGGED: 570 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 571 break; 572 case BHSSC_FLAGS_ATTR_SIMPLE: 573 io->scsiio.tag_type = CTL_TAG_SIMPLE; 574 break; 575 case BHSSC_FLAGS_ATTR_ORDERED: 576 io->scsiio.tag_type = CTL_TAG_ORDERED; 577 break; 578 case BHSSC_FLAGS_ATTR_HOQ: 579 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 580 break; 581 case BHSSC_FLAGS_ATTR_ACA: 582 io->scsiio.tag_type = CTL_TAG_ACA; 583 break; 584 default: 585 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 586 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 587 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 588 break; 589 } 590 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 591 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 592 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 593 error = ctl_queue(io); 594 if (error != CTL_RETVAL_COMPLETE) { 595 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 596 "dropping connection", error); 597 ctl_free_io(io); 598 refcount_release(&cs->cs_outstanding_ctl_pdus); 599 icl_pdu_free(request); 600 cfiscsi_session_terminate(cs); 601 } 602} 603 604static void 605cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 606{ 607 struct iscsi_bhs_task_management_request *bhstmr; 608 struct iscsi_bhs_task_management_response *bhstmr2; 609 struct icl_pdu *response; 610 struct cfiscsi_session *cs; 611 union ctl_io *io; 612 int error; 613 614 cs = PDU_SESSION(request); 615 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 616 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 617 if (io == NULL) { 618 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 619 "dropping connection"); 620 icl_pdu_free(request); 621 cfiscsi_session_terminate(cs); 622 return; 623 } 624 ctl_zero_io(io); 625 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 626 io->io_hdr.io_type = CTL_IO_TASK; 627 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 628 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 629 io->io_hdr.nexus.targ_target.id = 0; 630 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 631 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 632 io->io_hdr.nexus.lun_map_arg = cs; 633 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 634 635 switch (bhstmr->bhstmr_function & ~0x80) { 636 case BHSTMR_FUNCTION_ABORT_TASK: 637#if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 639#endif 640 io->taskio.task_action = CTL_TASK_ABORT_TASK; 641 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 642 break; 643 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 644#if 0 645 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 646#endif 647 io->taskio.task_action = CTL_TASK_LUN_RESET; 648 break; 649 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 650#if 0 651 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 652#endif 653 io->taskio.task_action = CTL_TASK_TARGET_RESET; 654 break; 655 default: 656 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 657 bhstmr->bhstmr_function & ~0x80); 658 ctl_free_io(io); 659 660 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 661 if (response == NULL) { 662 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 663 "dropping connection"); 664 icl_pdu_free(request); 665 cfiscsi_session_terminate(cs); 666 return; 667 } 668 bhstmr2 = (struct iscsi_bhs_task_management_response *) 669 response->ip_bhs; 670 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 671 bhstmr2->bhstmr_flags = 0x80; 672 bhstmr2->bhstmr_response = 673 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 674 bhstmr2->bhstmr_initiator_task_tag = 675 bhstmr->bhstmr_initiator_task_tag; 676 icl_pdu_free(request); 677 cfiscsi_pdu_queue(response); 678 return; 679 } 680 681 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 682 error = ctl_queue(io); 683 if (error != CTL_RETVAL_COMPLETE) { 684 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 685 "dropping connection", error); 686 ctl_free_io(io); 687 refcount_release(&cs->cs_outstanding_ctl_pdus); 688 icl_pdu_free(request); 689 cfiscsi_session_terminate(cs); 690 } 691} 692 693static bool 694cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 695{ 696 struct iscsi_bhs_data_out *bhsdo; 697 struct cfiscsi_session *cs; 698 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 699 size_t copy_len, len, off, buffer_offset; 700 int ctl_sg_count; 701 union ctl_io *io; 702 703 cs = PDU_SESSION(request); 704 705 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 706 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 707 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 708 ISCSI_BHS_OPCODE_SCSI_COMMAND, 709 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 710 711 /* 712 * We're only using fields common for Data-Out and SCSI Command PDUs. 713 */ 714 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 715 716 io = cdw->cdw_ctl_io; 717 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 718 ("CTL_FLAG_DATA_IN")); 719 720#if 0 721 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 722 request->ip_data_len, io->scsiio.kern_total_len); 723#endif 724 725 if (io->scsiio.kern_sg_entries > 0) { 726 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 727 ctl_sg_count = io->scsiio.kern_sg_entries; 728 } else { 729 ctl_sglist = &ctl_sg_entry; 730 ctl_sglist->addr = io->scsiio.kern_data_ptr; 731 ctl_sglist->len = io->scsiio.kern_data_len; 732 ctl_sg_count = 1; 733 } 734 735 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 736 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 737 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 738 else 739 buffer_offset = 0; 740 741 /* 742 * Make sure the offset, as sent by the initiator, matches the offset 743 * we're supposed to be at in the scatter-gather list. 744 */ 745 if (buffer_offset != 746 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 747 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 748 "expected %zd; dropping connection", buffer_offset, 749 (size_t)io->scsiio.kern_rel_offset + 750 (size_t)io->scsiio.ext_data_filled); 751 ctl_set_data_phase_error(&io->scsiio); 752 cfiscsi_session_terminate(cs); 753 return (true); 754 } 755 756 /* 757 * This is the offset within the PDU data segment, as opposed 758 * to buffer_offset, which is the offset within the task (SCSI 759 * command). 760 */ 761 off = 0; 762 len = icl_pdu_data_segment_length(request); 763 764 /* 765 * Iterate over the scatter/gather segments, filling them with data 766 * from the PDU data segment. Note that this can get called multiple 767 * times for one SCSI command; the cdw structure holds state for the 768 * scatter/gather list. 769 */ 770 for (;;) { 771 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 772 ("cdw->cdw_sg_index >= ctl_sg_count")); 773 if (cdw->cdw_sg_len == 0) { 774 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 775 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 776 } 777 KASSERT(off <= len, ("len > off")); 778 copy_len = len - off; 779 if (copy_len > cdw->cdw_sg_len) 780 copy_len = cdw->cdw_sg_len; 781 782 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 783 cdw->cdw_sg_addr += copy_len; 784 cdw->cdw_sg_len -= copy_len; 785 off += copy_len; 786 io->scsiio.ext_data_filled += copy_len; 787 788 if (cdw->cdw_sg_len == 0) { 789 /* 790 * End of current segment. 791 */ 792 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 793 /* 794 * Last segment in scatter/gather list. 795 */ 796 break; 797 } 798 cdw->cdw_sg_index++; 799 } 800 801 if (off == len) { 802 /* 803 * End of PDU payload. 804 */ 805 break; 806 } 807 } 808 809 if (len > off) { 810 /* 811 * In case of unsolicited data, it's possible that the buffer 812 * provided by CTL is smaller than negotiated FirstBurstLength. 813 * Just ignore the superfluous data; will ask for them with R2T 814 * on next call to cfiscsi_datamove(). 815 * 816 * This obviously can only happen with SCSI Command PDU. 817 */ 818 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 819 ISCSI_BHS_OPCODE_SCSI_COMMAND) { 820 CFISCSI_SESSION_DEBUG(cs, "received too much immediate " 821 "data: got %zd bytes, expected %zd", 822 icl_pdu_data_segment_length(request), off); 823 return (true); 824 } 825 826 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 827 "expected %zd; dropping connection", 828 icl_pdu_data_segment_length(request), off); 829 ctl_set_data_phase_error(&io->scsiio); 830 cfiscsi_session_terminate(cs); 831 return (true); 832 } 833 834 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len && 835 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 836 CFISCSI_SESSION_WARN(cs, "got the final packet without " 837 "the F flag; flags = 0x%x; dropping connection", 838 bhsdo->bhsdo_flags); 839 ctl_set_data_phase_error(&io->scsiio); 840 cfiscsi_session_terminate(cs); 841 return (true); 842 } 843 844 if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len && 845 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 846 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 847 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 848 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 849 "transmitted size was %zd bytes instead of %d; " 850 "dropping connection", 851 (size_t)io->scsiio.ext_data_filled, 852 io->scsiio.kern_data_len); 853 ctl_set_data_phase_error(&io->scsiio); 854 cfiscsi_session_terminate(cs); 855 return (true); 856 } else { 857 /* 858 * For SCSI Command PDU, this just means we need to 859 * solicit more data by sending R2T. 860 */ 861 return (false); 862 } 863 } 864 865 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) { 866#if 0 867 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 868 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 869#endif 870 871 return (true); 872 } 873 874 return (false); 875} 876 877static void 878cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 879{ 880 struct iscsi_bhs_data_out *bhsdo; 881 struct cfiscsi_session *cs; 882 struct cfiscsi_data_wait *cdw = NULL; 883 union ctl_io *io; 884 bool done; 885 886 cs = PDU_SESSION(request); 887 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 888 889 CFISCSI_SESSION_LOCK(cs); 890 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 891#if 0 892 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 893 "ttt 0x%x, itt 0x%x", 894 bhsdo->bhsdo_target_transfer_tag, 895 bhsdo->bhsdo_initiator_task_tag, 896 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 897#endif 898 if (bhsdo->bhsdo_target_transfer_tag == 899 cdw->cdw_target_transfer_tag) 900 break; 901 } 902 CFISCSI_SESSION_UNLOCK(cs); 903 if (cdw == NULL) { 904 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 905 "0x%x, not found; dropping connection", 906 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 907 icl_pdu_free(request); 908 cfiscsi_session_terminate(cs); 909 return; 910 } 911 912 io = cdw->cdw_ctl_io; 913 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 914 ("CTL_FLAG_DATA_IN")); 915 916 done = cfiscsi_handle_data_segment(request, cdw); 917 if (done) { 918 CFISCSI_SESSION_LOCK(cs); 919 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 920 CFISCSI_SESSION_UNLOCK(cs); 921 uma_zfree(cfiscsi_data_wait_zone, cdw); 922 io->scsiio.be_move_done(io); 923 } 924 925 icl_pdu_free(request); 926} 927 928static void 929cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 930{ 931 struct iscsi_bhs_logout_request *bhslr; 932 struct iscsi_bhs_logout_response *bhslr2; 933 struct icl_pdu *response; 934 struct cfiscsi_session *cs; 935 936 cs = PDU_SESSION(request); 937 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 938 switch (bhslr->bhslr_reason & 0x7f) { 939 case BHSLR_REASON_CLOSE_SESSION: 940 case BHSLR_REASON_CLOSE_CONNECTION: 941 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 942 if (response == NULL) { 943 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 944 icl_pdu_free(request); 945 cfiscsi_session_terminate(cs); 946 return; 947 } 948 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 949 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 950 bhslr2->bhslr_flags = 0x80; 951 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 952 bhslr2->bhslr_initiator_task_tag = 953 bhslr->bhslr_initiator_task_tag; 954 icl_pdu_free(request); 955 cfiscsi_pdu_queue(response); 956 cfiscsi_session_terminate(cs); 957 break; 958 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 959 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 960 if (response == NULL) { 961 CFISCSI_SESSION_WARN(cs, 962 "failed to allocate memory; dropping connection"); 963 icl_pdu_free(request); 964 cfiscsi_session_terminate(cs); 965 return; 966 } 967 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 968 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 969 bhslr2->bhslr_flags = 0x80; 970 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 971 bhslr2->bhslr_initiator_task_tag = 972 bhslr->bhslr_initiator_task_tag; 973 icl_pdu_free(request); 974 cfiscsi_pdu_queue(response); 975 break; 976 default: 977 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 978 bhslr->bhslr_reason); 979 icl_pdu_free(request); 980 cfiscsi_session_terminate(cs); 981 break; 982 } 983} 984 985static void 986cfiscsi_callout(void *context) 987{ 988 struct icl_pdu *cp; 989 struct iscsi_bhs_nop_in *bhsni; 990 struct cfiscsi_session *cs; 991 992 cs = context; 993 994 if (cs->cs_terminating) 995 return; 996 997 callout_schedule(&cs->cs_callout, 1 * hz); 998 999 atomic_add_int(&cs->cs_timeout, 1); 1000 1001#ifdef ICL_KERNEL_PROXY 1002 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1003 if (cs->cs_timeout > login_timeout) { 1004 CFISCSI_SESSION_WARN(cs, "login timed out after " 1005 "%d seconds; dropping connection", cs->cs_timeout); 1006 cfiscsi_session_terminate(cs); 1007 } 1008 return; 1009 } 1010#endif 1011 1012 if (cs->cs_timeout >= ping_timeout) { 1013 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1014 "dropping connection", ping_timeout); 1015 cfiscsi_session_terminate(cs); 1016 return; 1017 } 1018 1019 /* 1020 * If the ping was reset less than one second ago - which means 1021 * that we've received some PDU during the last second - assume 1022 * the traffic flows correctly and don't bother sending a NOP-Out. 1023 * 1024 * (It's 2 - one for one second, and one for incrementing is_timeout 1025 * earlier in this routine.) 1026 */ 1027 if (cs->cs_timeout < 2) 1028 return; 1029 1030 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1031 if (cp == NULL) { 1032 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1033 return; 1034 } 1035 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1036 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1037 bhsni->bhsni_flags = 0x80; 1038 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1039 1040 cfiscsi_pdu_queue(cp); 1041} 1042 1043static void 1044cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1045{ 1046 struct cfiscsi_data_wait *cdw, *tmpcdw; 1047 union ctl_io *io; 1048 int error; 1049 1050#ifdef notyet 1051 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1052 if (io == NULL) { 1053 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1054 return; 1055 } 1056 ctl_zero_io(io); 1057 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1058 io->io_hdr.io_type = CTL_IO_TASK; 1059 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1060 io->io_hdr.nexus.targ_port = 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; 1063 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1064 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1065 error = ctl_queue(io); 1066 if (error != CTL_RETVAL_COMPLETE) { 1067 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1068 ctl_free_io(io); 1069 } 1070#else 1071 /* 1072 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1073 * just iterate over tasks that are waiting for something - data - and 1074 * terminate those. 1075 */ 1076 CFISCSI_SESSION_LOCK(cs); 1077 TAILQ_FOREACH_SAFE(cdw, 1078 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1079 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1080 if (io == NULL) { 1081 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1082 return; 1083 } 1084 ctl_zero_io(io); 1085 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1086 io->io_hdr.io_type = CTL_IO_TASK; 1087 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1088 io->io_hdr.nexus.targ_port = 1089 cs->cs_target->ct_softc->fe.targ_port; 1090 io->io_hdr.nexus.targ_target.id = 0; 1091 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1092 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1093 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1094 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1095 error = ctl_queue(io); 1096 if (error != CTL_RETVAL_COMPLETE) { 1097 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1098 ctl_free_io(io); 1099 return; 1100 } 1101#if 0 1102 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1103 "0x%x", cdw->cdw_initiator_task_tag); 1104#endif 1105 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1106 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1107 uma_zfree(cfiscsi_data_wait_zone, cdw); 1108 } 1109 CFISCSI_SESSION_UNLOCK(cs); 1110#endif 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 cfiscsi_session_terminate_tasks(cs); 1128 callout_drain(&cs->cs_callout); 1129 1130 icl_conn_shutdown(cs->cs_conn); 1131 icl_conn_close(cs->cs_conn); 1132 1133 cs->cs_terminating++; 1134 1135 /* 1136 * XXX: We used to wait up to 30 seconds to deliver queued PDUs 1137 * to the initiator. We also tried hard to deliver SCSI Responses 1138 * for the aborted PDUs. We don't do that anymore. We might need 1139 * to revisit that. 1140 */ 1141 1142 cfiscsi_session_delete(cs); 1143 kthread_exit(); 1144 return; 1145 } 1146 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1147 } 1148} 1149 1150static void 1151cfiscsi_session_terminate(struct cfiscsi_session *cs) 1152{ 1153 1154 if (cs->cs_terminating != 0) 1155 return; 1156 cs->cs_terminating = 1; 1157 cv_signal(&cs->cs_maintenance_cv); 1158#ifdef ICL_KERNEL_PROXY 1159 cv_signal(&cs->cs_login_cv); 1160#endif 1161} 1162 1163static int 1164cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1165{ 1166 int error, i; 1167 struct cfiscsi_softc *softc; 1168 1169 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1170 1171 softc = &cfiscsi_softc; 1172 1173 mtx_lock(&softc->lock); 1174 for (i = 0; i < softc->max_initiators; i++) { 1175 if (softc->ctl_initids[i] == 0) 1176 break; 1177 } 1178 if (i == softc->max_initiators) { 1179 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1180 softc->max_initiators); 1181 mtx_unlock(&softc->lock); 1182 return (1); 1183 } 1184 softc->ctl_initids[i] = 1; 1185 mtx_unlock(&softc->lock); 1186 1187#if 0 1188 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1189 i, softc->max_initiators); 1190#endif 1191 cs->cs_ctl_initid = i; 1192 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1193 if (error != 0) { 1194 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1195 mtx_lock(&softc->lock); 1196 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1197 mtx_unlock(&softc->lock); 1198 cs->cs_ctl_initid = -1; 1199 return (1); 1200 } 1201 1202 return (0); 1203} 1204 1205static void 1206cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1207{ 1208 int error; 1209 struct cfiscsi_softc *softc; 1210 1211 if (cs->cs_ctl_initid == -1) 1212 return; 1213 1214 softc = &cfiscsi_softc; 1215 1216 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1217 if (error != 0) { 1218 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1219 error); 1220 } 1221 mtx_lock(&softc->lock); 1222 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1223 mtx_unlock(&softc->lock); 1224 cs->cs_ctl_initid = -1; 1225} 1226 1227static struct cfiscsi_session * 1228cfiscsi_session_new(struct cfiscsi_softc *softc) 1229{ 1230 struct cfiscsi_session *cs; 1231 int error; 1232 1233 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1234 if (cs == NULL) { 1235 CFISCSI_WARN("malloc failed"); 1236 return (NULL); 1237 } 1238 cs->cs_ctl_initid = -1; 1239 1240 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1241 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1242 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1243 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1244#ifdef ICL_KERNEL_PROXY 1245 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1246#endif 1247 1248 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1249 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1250 cs->cs_conn->ic_error = cfiscsi_error_callback; 1251 cs->cs_conn->ic_prv0 = cs; 1252 1253 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1254 if (error != 0) { 1255 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1256 free(cs, M_CFISCSI); 1257 return (NULL); 1258 } 1259 1260 mtx_lock(&softc->lock); 1261 cs->cs_id = softc->last_session_id + 1; 1262 softc->last_session_id++; 1263 mtx_unlock(&softc->lock); 1264 1265 mtx_lock(&softc->lock); 1266 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1267 mtx_unlock(&softc->lock); 1268 1269 /* 1270 * Start pinging the initiator. 1271 */ 1272 callout_init(&cs->cs_callout, 1); 1273 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1274 1275 return (cs); 1276} 1277 1278static void 1279cfiscsi_session_delete(struct cfiscsi_session *cs) 1280{ 1281 struct cfiscsi_softc *softc; 1282 1283 softc = &cfiscsi_softc; 1284 1285 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1286 ("destroying session with outstanding CTL pdus")); 1287 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1288 ("destroying session with non-empty queue")); 1289 1290 cfiscsi_session_unregister_initiator(cs); 1291 if (cs->cs_target != NULL) 1292 cfiscsi_target_release(cs->cs_target); 1293 icl_conn_close(cs->cs_conn); 1294 icl_conn_free(cs->cs_conn); 1295 1296 mtx_lock(&softc->lock); 1297 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1298 mtx_unlock(&softc->lock); 1299 1300 free(cs, M_CFISCSI); 1301} 1302 1303int 1304cfiscsi_init(void) 1305{ 1306 struct cfiscsi_softc *softc; 1307 struct ctl_frontend *fe; 1308 int retval; 1309 1310 softc = &cfiscsi_softc; 1311 retval = 0; 1312 bzero(softc, sizeof(*softc)); 1313 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1314 1315#ifdef ICL_KERNEL_PROXY 1316 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1317#endif 1318 TAILQ_INIT(&softc->sessions); 1319 TAILQ_INIT(&softc->targets); 1320 1321 fe = &softc->fe; 1322 fe->port_type = CTL_PORT_ISCSI; 1323 /* XXX KDM what should the real number be here? */ 1324 fe->num_requested_ctl_io = 4096; 1325 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1326 fe->port_name = softc->port_name; 1327 fe->port_online = cfiscsi_online; 1328 fe->port_offline = cfiscsi_offline; 1329 fe->onoff_arg = softc; 1330 fe->targ_enable = cfiscsi_targ_enable; 1331 fe->targ_disable = cfiscsi_targ_disable; 1332 fe->lun_enable = cfiscsi_lun_enable; 1333 fe->lun_disable = cfiscsi_lun_disable; 1334 fe->targ_lun_arg = softc; 1335 fe->ioctl = cfiscsi_ioctl; 1336 fe->devid = cfiscsi_devid; 1337 fe->fe_datamove = cfiscsi_datamove; 1338 fe->fe_done = cfiscsi_done; 1339 1340 /* XXX KDM what should we report here? */ 1341 /* XXX These should probably be fetched from CTL. */ 1342 fe->max_targets = 1; 1343 fe->max_target_id = 15; 1344 1345 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1346 if (retval != 0) { 1347 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1348 retval); 1349 retval = 1; 1350 goto bailout; 1351 } 1352 1353 softc->max_initiators = fe->max_initiators; 1354 1355 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1356 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1357 UMA_ALIGN_PTR, 0); 1358 1359 return (0); 1360 1361bailout: 1362 return (retval); 1363} 1364 1365static int 1366cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1367{ 1368 1369 switch (what) { 1370 case MOD_LOAD: 1371 return (cfiscsi_init()); 1372 case MOD_UNLOAD: 1373 return (EBUSY); 1374 default: 1375 return (EOPNOTSUPP); 1376 } 1377} 1378 1379#ifdef ICL_KERNEL_PROXY 1380static void 1381cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1382{ 1383 struct cfiscsi_session *cs; 1384 1385 cs = cfiscsi_session_new(&cfiscsi_softc); 1386 if (cs == NULL) { 1387 CFISCSI_WARN("failed to create session"); 1388 return; 1389 } 1390 1391 icl_conn_handoff_sock(cs->cs_conn, so); 1392 cs->cs_initiator_sa = sa; 1393 cs->cs_portal_id = portal_id; 1394 cs->cs_waiting_for_ctld = true; 1395 cv_signal(&cfiscsi_softc.accept_cv); 1396} 1397#endif 1398 1399static void 1400cfiscsi_online(void *arg) 1401{ 1402 struct cfiscsi_softc *softc; 1403 1404 softc = (struct cfiscsi_softc *)arg; 1405 1406 softc->online = 1; 1407#ifdef ICL_KERNEL_PROXY 1408 if (softc->listener != NULL) 1409 icl_listen_free(softc->listener); 1410 softc->listener = icl_listen_new(cfiscsi_accept); 1411#endif 1412} 1413 1414static void 1415cfiscsi_offline(void *arg) 1416{ 1417 struct cfiscsi_softc *softc; 1418 struct cfiscsi_session *cs; 1419 1420 softc = (struct cfiscsi_softc *)arg; 1421 1422 softc->online = 0; 1423 1424 mtx_lock(&softc->lock); 1425 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1426 cfiscsi_session_terminate(cs); 1427 mtx_unlock(&softc->lock); 1428 1429#ifdef ICL_KERNEL_PROXY 1430 icl_listen_free(softc->listener); 1431 softc->listener = NULL; 1432#endif 1433} 1434 1435static int 1436cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1437{ 1438 1439 return (0); 1440} 1441 1442static int 1443cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1444{ 1445 1446 return (0); 1447} 1448 1449static void 1450cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1451{ 1452 struct cfiscsi_softc *softc; 1453 struct cfiscsi_session *cs; 1454 struct cfiscsi_target *ct; 1455 struct ctl_iscsi_handoff_params *cihp; 1456 int error; 1457 1458 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1459 softc = &cfiscsi_softc; 1460 1461 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1462 cihp->initiator_name, cihp->initiator_addr, 1463 cihp->target_name); 1464 1465 if (softc->online == 0) { 1466 ci->status = CTL_ISCSI_ERROR; 1467 snprintf(ci->error_str, sizeof(ci->error_str), 1468 "%s: port offline", __func__); 1469 return; 1470 } 1471 1472 ct = cfiscsi_target_find(softc, cihp->target_name); 1473 if (ct == NULL) { 1474 ci->status = CTL_ISCSI_ERROR; 1475 snprintf(ci->error_str, sizeof(ci->error_str), 1476 "%s: target not found", __func__); 1477 return; 1478 } 1479 1480#ifdef ICL_KERNEL_PROXY 1481 if (cihp->socket > 0 && cihp->connection_id > 0) { 1482 snprintf(ci->error_str, sizeof(ci->error_str), 1483 "both socket and connection_id set"); 1484 ci->status = CTL_ISCSI_ERROR; 1485 cfiscsi_target_release(ct); 1486 return; 1487 } 1488 if (cihp->socket == 0) { 1489 mtx_lock(&cfiscsi_softc.lock); 1490 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1491 if (cs->cs_id == cihp->socket) 1492 break; 1493 } 1494 if (cs == NULL) { 1495 mtx_unlock(&cfiscsi_softc.lock); 1496 snprintf(ci->error_str, sizeof(ci->error_str), 1497 "connection not found"); 1498 ci->status = CTL_ISCSI_ERROR; 1499 cfiscsi_target_release(ct); 1500 return; 1501 } 1502 mtx_unlock(&cfiscsi_softc.lock); 1503 } else { 1504#endif 1505 cs = cfiscsi_session_new(softc); 1506 if (cs == NULL) { 1507 ci->status = CTL_ISCSI_ERROR; 1508 snprintf(ci->error_str, sizeof(ci->error_str), 1509 "%s: cfiscsi_session_new failed", __func__); 1510 cfiscsi_target_release(ct); 1511 return; 1512 } 1513#ifdef ICL_KERNEL_PROXY 1514 } 1515#endif 1516 cs->cs_target = ct; 1517 1518 /* 1519 * First PDU of Full Feature phase has the same CmdSN as the last 1520 * PDU from the Login Phase received from the initiator. Thus, 1521 * the -1 below. 1522 */ 1523 cs->cs_portal_group_tag = cihp->portal_group_tag; 1524 cs->cs_cmdsn = cihp->cmdsn; 1525 cs->cs_statsn = cihp->statsn; 1526 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1527 cs->cs_max_burst_length = cihp->max_burst_length; 1528 cs->cs_immediate_data = !!cihp->immediate_data; 1529 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1530 cs->cs_conn->ic_header_crc32c = true; 1531 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1532 cs->cs_conn->ic_data_crc32c = true; 1533 1534 strlcpy(cs->cs_initiator_name, 1535 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1536 strlcpy(cs->cs_initiator_addr, 1537 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1538 strlcpy(cs->cs_initiator_alias, 1539 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1540 1541#ifdef ICL_KERNEL_PROXY 1542 if (cihp->socket > 0) { 1543#endif 1544 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1545 if (error != 0) { 1546 cfiscsi_session_delete(cs); 1547 ci->status = CTL_ISCSI_ERROR; 1548 snprintf(ci->error_str, sizeof(ci->error_str), 1549 "%s: icl_conn_handoff failed with error %d", 1550 __func__, error); 1551 return; 1552 } 1553#ifdef ICL_KERNEL_PROXY 1554 } 1555#endif 1556 1557 /* 1558 * Register initiator with CTL. 1559 */ 1560 cfiscsi_session_register_initiator(cs); 1561 1562#ifdef ICL_KERNEL_PROXY 1563 cs->cs_login_phase = false; 1564 1565 /* 1566 * First PDU of the Full Feature phase has likely already arrived. 1567 * We have to pick it up and execute properly. 1568 */ 1569 if (cs->cs_login_pdu != NULL) { 1570 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1571 cfiscsi_pdu_handle(cs->cs_login_pdu); 1572 cs->cs_login_pdu = NULL; 1573 } 1574#endif 1575 1576 ci->status = CTL_ISCSI_OK; 1577} 1578 1579static void 1580cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1581{ 1582 struct ctl_iscsi_list_params *cilp; 1583 struct cfiscsi_session *cs; 1584 struct cfiscsi_softc *softc; 1585 struct sbuf *sb; 1586 int error; 1587 1588 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1589 softc = &cfiscsi_softc; 1590 1591 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1592 if (sb == NULL) { 1593 ci->status = CTL_ISCSI_ERROR; 1594 snprintf(ci->error_str, sizeof(ci->error_str), 1595 "Unable to allocate %d bytes for iSCSI session list", 1596 cilp->alloc_len); 1597 return; 1598 } 1599 1600 sbuf_printf(sb, "<ctlislist>\n"); 1601 mtx_lock(&softc->lock); 1602 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1603#ifdef ICL_KERNEL_PROXY 1604 if (cs->cs_target == NULL) 1605 continue; 1606#endif 1607 error = sbuf_printf(sb, "<connection id=\"%d\">" 1608 "<initiator>%s</initiator>" 1609 "<initiator_addr>%s</initiator_addr>" 1610 "<initiator_alias>%s</initiator_alias>" 1611 "<target>%s</target>" 1612 "<target_alias>%s</target_alias>" 1613 "<header_digest>%s</header_digest>" 1614 "<data_digest>%s</data_digest>" 1615 "<max_data_segment_length>%zd</max_data_segment_length>" 1616 "<immediate_data>%d</immediate_data>" 1617 "<iser>%d</iser>" 1618 "</connection>\n", 1619 cs->cs_id, 1620 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1621 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1622 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1623 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1624 cs->cs_max_data_segment_length, 1625 cs->cs_immediate_data, 1626 cs->cs_conn->ic_iser); 1627 if (error != 0) 1628 break; 1629 } 1630 mtx_unlock(&softc->lock); 1631 error = sbuf_printf(sb, "</ctlislist>\n"); 1632 if (error != 0) { 1633 sbuf_delete(sb); 1634 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1635 snprintf(ci->error_str, sizeof(ci->error_str), 1636 "Out of space, %d bytes is too small", cilp->alloc_len); 1637 return; 1638 } 1639 sbuf_finish(sb); 1640 1641 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1642 cilp->fill_len = sbuf_len(sb) + 1; 1643 ci->status = CTL_ISCSI_OK; 1644 sbuf_delete(sb); 1645} 1646 1647static void 1648cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1649{ 1650 struct icl_pdu *response; 1651 struct iscsi_bhs_asynchronous_message *bhsam; 1652 struct ctl_iscsi_terminate_params *citp; 1653 struct cfiscsi_session *cs; 1654 struct cfiscsi_softc *softc; 1655 int found = 0; 1656 1657 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1658 softc = &cfiscsi_softc; 1659 1660 mtx_lock(&softc->lock); 1661 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1662 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1663 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1664 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1665 continue; 1666 1667 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1668 if (response == NULL) { 1669 /* 1670 * Oh well. Just terminate the connection. 1671 */ 1672 } else { 1673 bhsam = (struct iscsi_bhs_asynchronous_message *) 1674 response->ip_bhs; 1675 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1676 bhsam->bhsam_flags = 0x80; 1677 bhsam->bhsam_0xffffffff = 0xffffffff; 1678 bhsam->bhsam_async_event = 1679 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1680 cfiscsi_pdu_queue(response); 1681 } 1682 cfiscsi_session_terminate(cs); 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 1697static void 1698cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1699{ 1700 struct icl_pdu *response; 1701 struct iscsi_bhs_asynchronous_message *bhsam; 1702 struct ctl_iscsi_logout_params *cilp; 1703 struct cfiscsi_session *cs; 1704 struct cfiscsi_softc *softc; 1705 int found = 0; 1706 1707 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1708 softc = &cfiscsi_softc; 1709 1710 mtx_lock(&softc->lock); 1711 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1712 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1713 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1714 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1715 continue; 1716 1717 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1718 if (response == NULL) { 1719 ci->status = CTL_ISCSI_ERROR; 1720 snprintf(ci->error_str, sizeof(ci->error_str), 1721 "Unable to allocate memory"); 1722 mtx_unlock(&softc->lock); 1723 return; 1724 } 1725 bhsam = 1726 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1727 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1728 bhsam->bhsam_flags = 0x80; 1729 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1730 bhsam->bhsam_parameter3 = htons(10); 1731 cfiscsi_pdu_queue(response); 1732 found++; 1733 } 1734 mtx_unlock(&softc->lock); 1735 1736 if (found == 0) { 1737 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1738 snprintf(ci->error_str, sizeof(ci->error_str), 1739 "No matching connections found"); 1740 return; 1741 } 1742 1743 ci->status = CTL_ISCSI_OK; 1744} 1745 1746#ifdef ICL_KERNEL_PROXY 1747static void 1748cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1749{ 1750 struct ctl_iscsi_listen_params *cilp; 1751 struct sockaddr *sa; 1752 int error; 1753 1754 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1755 1756 if (cfiscsi_softc.listener == NULL) { 1757 CFISCSI_DEBUG("no listener"); 1758 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1759 ci->status = CTL_ISCSI_ERROR; 1760 return; 1761 } 1762 1763 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1764 if (error != 0) { 1765 CFISCSI_DEBUG("getsockaddr, error %d", error); 1766 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1767 ci->status = CTL_ISCSI_ERROR; 1768 return; 1769 } 1770 1771 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1772 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1773 if (error != 0) { 1774 free(sa, M_SONAME); 1775 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1776 snprintf(ci->error_str, sizeof(ci->error_str), 1777 "icl_listen_add failed, error %d", error); 1778 ci->status = CTL_ISCSI_ERROR; 1779 return; 1780 } 1781 1782 ci->status = CTL_ISCSI_OK; 1783} 1784 1785static void 1786cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1787{ 1788 struct ctl_iscsi_accept_params *ciap; 1789 struct cfiscsi_session *cs; 1790 int error; 1791 1792 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1793 1794 mtx_lock(&cfiscsi_softc.lock); 1795 for (;;) { 1796 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1797 if (cs->cs_waiting_for_ctld) 1798 break; 1799 } 1800 if (cs != NULL) 1801 break; 1802 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1803 if (error != 0) { 1804 mtx_unlock(&cfiscsi_softc.lock); 1805 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1806 ci->status = CTL_ISCSI_ERROR; 1807 return; 1808 } 1809 } 1810 mtx_unlock(&cfiscsi_softc.lock); 1811 1812 cs->cs_waiting_for_ctld = false; 1813 cs->cs_login_phase = true; 1814 1815 ciap->connection_id = cs->cs_id; 1816 ciap->portal_id = cs->cs_portal_id; 1817 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1818 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1819 cs->cs_initiator_sa->sa_len); 1820 if (error != 0) { 1821 snprintf(ci->error_str, sizeof(ci->error_str), 1822 "copyout failed with error %d", error); 1823 ci->status = CTL_ISCSI_ERROR; 1824 return; 1825 } 1826 1827 ci->status = CTL_ISCSI_OK; 1828} 1829 1830static void 1831cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1832{ 1833 struct ctl_iscsi_send_params *cisp; 1834 struct cfiscsi_session *cs; 1835 struct icl_pdu *ip; 1836 size_t datalen; 1837 void *data; 1838 int error; 1839 1840 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1841 1842 mtx_lock(&cfiscsi_softc.lock); 1843 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1844 if (cs->cs_id == cisp->connection_id) 1845 break; 1846 } 1847 if (cs == NULL) { 1848 mtx_unlock(&cfiscsi_softc.lock); 1849 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1850 ci->status = CTL_ISCSI_ERROR; 1851 return; 1852 } 1853 mtx_unlock(&cfiscsi_softc.lock); 1854 1855#if 0 1856 if (cs->cs_login_phase == false) 1857 return (EBUSY); 1858#endif 1859 1860 if (cs->cs_terminating) { 1861 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1862 ci->status = CTL_ISCSI_ERROR; 1863 return; 1864 } 1865 1866 datalen = cisp->data_segment_len; 1867 /* 1868 * XXX 1869 */ 1870 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1871 if (datalen > 65535) { 1872 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1873 ci->status = CTL_ISCSI_ERROR; 1874 return; 1875 } 1876 if (datalen > 0) { 1877 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1878 error = copyin(cisp->data_segment, data, datalen); 1879 if (error != 0) { 1880 free(data, M_CFISCSI); 1881 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1882 ci->status = CTL_ISCSI_ERROR; 1883 return; 1884 } 1885 } 1886 1887 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1888 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1889 if (datalen > 0) { 1890 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1891 free(data, M_CFISCSI); 1892 } 1893 CFISCSI_SESSION_LOCK(cs); 1894 icl_pdu_queue(ip); 1895 CFISCSI_SESSION_UNLOCK(cs); 1896 ci->status = CTL_ISCSI_OK; 1897} 1898 1899static void 1900cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1901{ 1902 struct ctl_iscsi_receive_params *cirp; 1903 struct cfiscsi_session *cs; 1904 struct icl_pdu *ip; 1905 void *data; 1906 int error; 1907 1908 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1909 1910 mtx_lock(&cfiscsi_softc.lock); 1911 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1912 if (cs->cs_id == cirp->connection_id) 1913 break; 1914 } 1915 if (cs == NULL) { 1916 mtx_unlock(&cfiscsi_softc.lock); 1917 snprintf(ci->error_str, sizeof(ci->error_str), 1918 "connection not found"); 1919 ci->status = CTL_ISCSI_ERROR; 1920 return; 1921 } 1922 mtx_unlock(&cfiscsi_softc.lock); 1923 1924#if 0 1925 if (is->is_login_phase == false) 1926 return (EBUSY); 1927#endif 1928 1929 CFISCSI_SESSION_LOCK(cs); 1930 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1931 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1932 if (error != 0) { 1933 CFISCSI_SESSION_UNLOCK(cs); 1934 snprintf(ci->error_str, sizeof(ci->error_str), 1935 "interrupted by signal"); 1936 ci->status = CTL_ISCSI_ERROR; 1937 return; 1938 } 1939 } 1940 1941 if (cs->cs_terminating) { 1942 CFISCSI_SESSION_UNLOCK(cs); 1943 snprintf(ci->error_str, sizeof(ci->error_str), 1944 "connection terminating"); 1945 ci->status = CTL_ISCSI_ERROR; 1946 return; 1947 } 1948 ip = cs->cs_login_pdu; 1949 cs->cs_login_pdu = NULL; 1950 CFISCSI_SESSION_UNLOCK(cs); 1951 1952 if (ip->ip_data_len > cirp->data_segment_len) { 1953 icl_pdu_free(ip); 1954 snprintf(ci->error_str, sizeof(ci->error_str), 1955 "data segment too big"); 1956 ci->status = CTL_ISCSI_ERROR; 1957 return; 1958 } 1959 1960 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1961 if (ip->ip_data_len > 0) { 1962 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1963 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1964 copyout(data, cirp->data_segment, ip->ip_data_len); 1965 free(data, M_CFISCSI); 1966 } 1967 1968 icl_pdu_free(ip); 1969 ci->status = CTL_ISCSI_OK; 1970} 1971 1972#endif /* !ICL_KERNEL_PROXY */ 1973 1974static int 1975cfiscsi_ioctl(struct cdev *dev, 1976 u_long cmd, caddr_t addr, int flag, struct thread *td) 1977{ 1978 struct ctl_iscsi *ci; 1979 1980 if (cmd != CTL_ISCSI) 1981 return (ENOTTY); 1982 1983 ci = (struct ctl_iscsi *)addr; 1984 switch (ci->type) { 1985 case CTL_ISCSI_HANDOFF: 1986 cfiscsi_ioctl_handoff(ci); 1987 break; 1988 case CTL_ISCSI_LIST: 1989 cfiscsi_ioctl_list(ci); 1990 break; 1991 case CTL_ISCSI_TERMINATE: 1992 cfiscsi_ioctl_terminate(ci); 1993 break; 1994 case CTL_ISCSI_LOGOUT: 1995 cfiscsi_ioctl_logout(ci); 1996 break; 1997#ifdef ICL_KERNEL_PROXY 1998 case CTL_ISCSI_LISTEN: 1999 cfiscsi_ioctl_listen(ci); 2000 break; 2001 case CTL_ISCSI_ACCEPT: 2002 cfiscsi_ioctl_accept(ci); 2003 break; 2004 case CTL_ISCSI_SEND: 2005 cfiscsi_ioctl_send(ci); 2006 break; 2007 case CTL_ISCSI_RECEIVE: 2008 cfiscsi_ioctl_receive(ci); 2009 break; 2010#else 2011 case CTL_ISCSI_LISTEN: 2012 case CTL_ISCSI_ACCEPT: 2013 case CTL_ISCSI_SEND: 2014 case CTL_ISCSI_RECEIVE: 2015 ci->status = CTL_ISCSI_ERROR; 2016 snprintf(ci->error_str, sizeof(ci->error_str), 2017 "%s: CTL compiled without ICL_KERNEL_PROXY", 2018 __func__); 2019 break; 2020#endif /* !ICL_KERNEL_PROXY */ 2021 default: 2022 ci->status = CTL_ISCSI_ERROR; 2023 snprintf(ci->error_str, sizeof(ci->error_str), 2024 "%s: invalid iSCSI request type %d", __func__, ci->type); 2025 break; 2026 } 2027 2028 return (0); 2029} 2030 2031static int 2032cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 2033{ 2034 struct cfiscsi_session *cs; 2035 struct scsi_vpd_device_id *devid_ptr; 2036 struct scsi_vpd_id_descriptor *desc, *desc1; 2037 struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */ 2038 struct scsi_vpd_id_t10 *t10id; 2039 struct ctl_lun *lun; 2040 const struct icl_pdu *request; 2041 size_t devid_len, wwpn_len; 2042 2043 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 2044 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2045 cs = PDU_SESSION(request); 2046 2047 wwpn_len = strlen(cs->cs_target->ct_name); 2048 wwpn_len += strlen(",t,0x01"); 2049 wwpn_len += 1; /* '\0' */ 2050 if ((wwpn_len % 4) != 0) 2051 wwpn_len += (4 - (wwpn_len % 4)); 2052 2053 devid_len = sizeof(struct scsi_vpd_device_id) + 2054 sizeof(struct scsi_vpd_id_descriptor) + 2055 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 2056 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 2057 sizeof(struct scsi_vpd_id_descriptor) + 2058 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 2059 sizeof(struct scsi_vpd_id_descriptor) + 2060 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 2061 2062 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 2063 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 2064 ctsio->kern_sg_entries = 0; 2065 2066 if (devid_len < alloc_len) { 2067 ctsio->residual = alloc_len - devid_len; 2068 ctsio->kern_data_len = devid_len; 2069 ctsio->kern_total_len = devid_len; 2070 } else { 2071 ctsio->residual = 0; 2072 ctsio->kern_data_len = alloc_len; 2073 ctsio->kern_total_len = alloc_len; 2074 } 2075 ctsio->kern_data_resid = 0; 2076 ctsio->kern_rel_offset = 0; 2077 ctsio->kern_sg_entries = 0; 2078 2079 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2080 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2081 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2082 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 2083 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2084 wwpn_len); 2085 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2086 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2087 2088 if (lun != NULL) 2089 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2090 lun->be_lun->lun_type; 2091 else 2092 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2093 2094 devid_ptr->page_code = SVPD_DEVICE_ID; 2095 2096 scsi_ulto2b(devid_len - 4, devid_ptr->length); 2097 2098 /* 2099 * We're using a LUN association here. i.e., this device ID is a 2100 * per-LUN identifier. 2101 */ 2102 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2103 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2104 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 2105 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2106 2107 /* 2108 * If we've actually got a backend, copy the device id from the 2109 * per-LUN data. Otherwise, set it to all spaces. 2110 */ 2111 if (lun != NULL) { 2112 /* 2113 * Copy the backend's LUN ID. 2114 */ 2115 strncpy((char *)t10id->vendor_spec_id, 2116 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2117 } else { 2118 /* 2119 * No backend, set this to spaces. 2120 */ 2121 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2122 } 2123 2124 /* 2125 * desc1 is for the WWPN which is a port asscociation. 2126 */ 2127 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2128 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2129 SVPD_ID_TYPE_SCSI_NAME; 2130 desc1->length = wwpn_len; 2131 snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x", 2132 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2133 2134 /* 2135 * desc2 is for the Relative Target Port(type 4h) identifier 2136 */ 2137 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2138 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2139 SVPD_ID_TYPE_RELTARG; 2140 desc2->length = 4; 2141 desc2->identifier[3] = 1; 2142 2143 /* 2144 * desc3 is for the Target Port Group(type 5h) identifier 2145 */ 2146 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2147 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2148 SVPD_ID_TYPE_TPORTGRP; 2149 desc3->length = 4; 2150 desc3->identifier[3] = 1; 2151 2152 ctsio->scsi_status = SCSI_STATUS_OK; 2153 2154 ctsio->be_move_done = ctl_config_move_done; 2155 ctl_datamove((union ctl_io *)ctsio); 2156 2157 return (CTL_RETVAL_COMPLETE); 2158} 2159 2160static void 2161cfiscsi_target_hold(struct cfiscsi_target *ct) 2162{ 2163 2164 refcount_acquire(&ct->ct_refcount); 2165} 2166 2167static void 2168cfiscsi_target_release(struct cfiscsi_target *ct) 2169{ 2170 struct cfiscsi_softc *softc; 2171 2172 softc = ct->ct_softc; 2173 mtx_lock(&softc->lock); 2174 if (refcount_release(&ct->ct_refcount)) { 2175 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2176 mtx_unlock(&softc->lock); 2177 free(ct, M_CFISCSI); 2178 2179 return; 2180 } 2181 mtx_unlock(&softc->lock); 2182} 2183 2184static struct cfiscsi_target * 2185cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2186{ 2187 struct cfiscsi_target *ct; 2188 2189 mtx_lock(&softc->lock); 2190 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2191 if (strcmp(name, ct->ct_name) != 0) 2192 continue; 2193 cfiscsi_target_hold(ct); 2194 mtx_unlock(&softc->lock); 2195 return (ct); 2196 } 2197 mtx_unlock(&softc->lock); 2198 2199 return (NULL); 2200} 2201 2202static struct cfiscsi_target * 2203cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2204 const char *alias) 2205{ 2206 struct cfiscsi_target *ct, *newct; 2207 int i; 2208 2209 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2210 return (NULL); 2211 2212 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2213 2214 mtx_lock(&softc->lock); 2215 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2216 if (strcmp(name, ct->ct_name) != 0) 2217 continue; 2218 cfiscsi_target_hold(ct); 2219 mtx_unlock(&softc->lock); 2220 free(newct, M_CFISCSI); 2221 return (ct); 2222 } 2223 2224 for (i = 0; i < CTL_MAX_LUNS; i++) 2225 newct->ct_luns[i] = -1; 2226 2227 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2228 if (alias != NULL) 2229 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2230 refcount_init(&newct->ct_refcount, 1); 2231 newct->ct_softc = softc; 2232 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2233 mtx_unlock(&softc->lock); 2234 2235 return (newct); 2236} 2237 2238/* 2239 * Takes LUN from the target space and returns LUN from the CTL space. 2240 */ 2241static uint32_t 2242cfiscsi_map_lun(void *arg, uint32_t lun) 2243{ 2244 struct cfiscsi_session *cs; 2245 2246 cs = arg; 2247 2248 if (lun >= CTL_MAX_LUNS) { 2249 CFISCSI_DEBUG("requested lun number %d is higher " 2250 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2251 return (0xffffffff); 2252 } 2253 2254 if (cs->cs_target->ct_luns[lun] < 0) 2255 return (0xffffffff); 2256 2257 return (cs->cs_target->ct_luns[lun]); 2258} 2259 2260static int 2261cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2262 unsigned long lun_id, unsigned long ctl_lun_id) 2263{ 2264 2265 if (lun_id >= CTL_MAX_LUNS) { 2266 CFISCSI_WARN("requested lun number %ld is higher " 2267 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2268 return (-1); 2269 } 2270 2271 if (ct->ct_luns[lun_id] >= 0) { 2272 /* 2273 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2274 * when the LUN is created, and a second time just before 2275 * the port is brought online; don't emit warnings 2276 * for that case. 2277 */ 2278 if (ct->ct_luns[lun_id] == ctl_lun_id) 2279 return (0); 2280 CFISCSI_WARN("lun %ld already allocated", lun_id); 2281 return (-1); 2282 } 2283 2284#if 0 2285 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2286 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2287#endif 2288 2289 ct->ct_luns[lun_id] = ctl_lun_id; 2290 cfiscsi_target_hold(ct); 2291 2292 return (0); 2293} 2294 2295static int 2296cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2297{ 2298 2299 if (ct->ct_luns[lun_id] < 0) { 2300 CFISCSI_WARN("lun %ld not allocated", lun_id); 2301 return (-1); 2302 } 2303 2304 ct->ct_luns[lun_id] = -1; 2305 cfiscsi_target_release(ct); 2306 2307 return (0); 2308} 2309 2310static int 2311cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2312{ 2313 struct cfiscsi_softc *softc; 2314 struct cfiscsi_target *ct; 2315 const char *target = NULL, *target_alias = NULL; 2316 const char *lun = NULL; 2317 unsigned long tmp; 2318 2319 softc = (struct cfiscsi_softc *)arg; 2320 2321 target = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun, 2322 "cfiscsi_target"); 2323 target_alias = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun, 2324 "cfiscsi_target)alias"); 2325 lun = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun, 2326 "cfiscsi_lun"); 2327 2328 if (target == NULL && lun == NULL) 2329 return (0); 2330 2331 if (target == NULL || lun == NULL) { 2332 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2333 "cfiscsi_lun, or the other way around; ignoring"); 2334 return (0); 2335 } 2336 2337 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2338 if (ct == NULL) { 2339 CFISCSI_WARN("failed to create target \"%s\"", target); 2340 return (0); 2341 } 2342 2343 tmp = strtoul(lun, NULL, 10); 2344 cfiscsi_target_set_lun(ct, tmp, lun_id); 2345 cfiscsi_target_release(ct); 2346 return (0); 2347} 2348 2349static int 2350cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2351{ 2352 struct cfiscsi_softc *softc; 2353 struct cfiscsi_target *ct; 2354 int i; 2355 2356 softc = (struct cfiscsi_softc *)arg; 2357 2358 mtx_lock(&softc->lock); 2359 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2360 for (i = 0; i < CTL_MAX_LUNS; i++) { 2361 if (ct->ct_luns[i] < 0) 2362 continue; 2363 if (ct->ct_luns[i] != lun_id) 2364 continue; 2365 mtx_unlock(&softc->lock); 2366 cfiscsi_target_unset_lun(ct, i); 2367 return (0); 2368 } 2369 } 2370 mtx_unlock(&softc->lock); 2371 return (0); 2372} 2373 2374static void 2375cfiscsi_datamove_in(union ctl_io *io) 2376{ 2377 struct cfiscsi_session *cs; 2378 struct icl_pdu *request, *response; 2379 const struct iscsi_bhs_scsi_command *bhssc; 2380 struct iscsi_bhs_data_in *bhsdi; 2381 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2382 size_t len, expected_len, sg_len, buffer_offset; 2383 const char *sg_addr; 2384 int ctl_sg_count, error, i; 2385 2386 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2387 cs = PDU_SESSION(request); 2388 2389 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2390 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2391 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2392 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2393 2394 if (io->scsiio.kern_sg_entries > 0) { 2395 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2396 ctl_sg_count = io->scsiio.kern_sg_entries; 2397 } else { 2398 ctl_sglist = &ctl_sg_entry; 2399 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2400 ctl_sglist->len = io->scsiio.kern_data_len; 2401 ctl_sg_count = 1; 2402 } 2403 2404 /* 2405 * This is the total amount of data to be transferred within the current 2406 * SCSI command. We need to record it so that we can properly report 2407 * underflow/underflow. 2408 */ 2409 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2410 2411 /* 2412 * This is the offset within the current SCSI command; for the first 2413 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2414 * it will be the sum of lengths of previous ones. 2415 */ 2416 buffer_offset = io->scsiio.kern_rel_offset; 2417 2418 /* 2419 * This is the transfer length expected by the initiator. In theory, 2420 * it could be different from the correct amount of data from the SCSI 2421 * point of view, even if that doesn't make any sense. 2422 */ 2423 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2424#if 0 2425 if (expected_len != io->scsiio.kern_total_len) { 2426 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2427 "actual length %zd", expected_len, 2428 (size_t)io->scsiio.kern_total_len); 2429 } 2430#endif 2431 2432 if (buffer_offset >= expected_len) { 2433#if 0 2434 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2435 "already sent the expected len", buffer_offset); 2436#endif 2437 io->scsiio.be_move_done(io); 2438 return; 2439 } 2440 2441 i = 0; 2442 sg_addr = NULL; 2443 sg_len = 0; 2444 response = NULL; 2445 bhsdi = NULL; 2446 for (;;) { 2447 if (response == NULL) { 2448 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2449 if (response == NULL) { 2450 CFISCSI_SESSION_WARN(cs, "failed to " 2451 "allocate memory; dropping connection"); 2452 ctl_set_busy(&io->scsiio); 2453 io->scsiio.be_move_done(io); 2454 cfiscsi_session_terminate(cs); 2455 return; 2456 } 2457 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2458 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2459 bhsdi->bhsdi_initiator_task_tag = 2460 bhssc->bhssc_initiator_task_tag; 2461 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2462 PDU_EXPDATASN(request)++; 2463 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2464 } 2465 2466 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2467 if (sg_len == 0) { 2468 sg_addr = ctl_sglist[i].addr; 2469 sg_len = ctl_sglist[i].len; 2470 KASSERT(sg_len > 0, ("sg_len <= 0")); 2471 } 2472 2473 len = sg_len; 2474 2475 /* 2476 * Truncate to maximum data segment length. 2477 */ 2478 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2479 ("ip_data_len %zd >= max_data_segment_length %zd", 2480 response->ip_data_len, cs->cs_max_data_segment_length)); 2481 if (response->ip_data_len + len > 2482 cs->cs_max_data_segment_length) { 2483 len = cs->cs_max_data_segment_length - 2484 response->ip_data_len; 2485 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2486 len, sg_len)); 2487 } 2488 2489 /* 2490 * Truncate to expected data transfer length. 2491 */ 2492 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2493 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2494 buffer_offset, response->ip_data_len, expected_len)); 2495 if (buffer_offset + response->ip_data_len + len > expected_len) { 2496 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2497 "to expected data transfer length %zd", 2498 buffer_offset + response->ip_data_len + len, expected_len); 2499 len = expected_len - (buffer_offset + response->ip_data_len); 2500 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2501 len, sg_len)); 2502 } 2503 2504 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2505 if (error != 0) { 2506 CFISCSI_SESSION_WARN(cs, "failed to " 2507 "allocate memory; dropping connection"); 2508 icl_pdu_free(response); 2509 ctl_set_busy(&io->scsiio); 2510 io->scsiio.be_move_done(io); 2511 cfiscsi_session_terminate(cs); 2512 return; 2513 } 2514 sg_addr += len; 2515 sg_len -= len; 2516 2517 KASSERT(buffer_offset + request->ip_data_len <= expected_len, 2518 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2519 buffer_offset, request->ip_data_len, expected_len)); 2520 if (buffer_offset + request->ip_data_len == expected_len) { 2521 /* 2522 * Already have the amount of data the initiator wanted. 2523 */ 2524 break; 2525 } 2526 2527 if (sg_len == 0) { 2528 /* 2529 * End of scatter-gather segment; 2530 * proceed to the next one... 2531 */ 2532 if (i == ctl_sg_count - 1) { 2533 /* 2534 * ... unless this was the last one. 2535 */ 2536 break; 2537 } 2538 i++; 2539 } 2540 2541 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2542 /* 2543 * Can't stuff more data into the current PDU; 2544 * queue it. Note that's not enough to check 2545 * for kern_data_resid == 0 instead; there 2546 * may be several Data-In PDUs for the final 2547 * call to cfiscsi_datamove(), and we want 2548 * to set the F flag only on the last of them. 2549 */ 2550 buffer_offset += response->ip_data_len; 2551 if (buffer_offset == io->scsiio.kern_total_len || 2552 buffer_offset == expected_len) 2553 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2554 cfiscsi_pdu_queue(response); 2555 response = NULL; 2556 bhsdi = NULL; 2557 } 2558 } 2559 if (response != NULL) { 2560 buffer_offset += response->ip_data_len; 2561 if (buffer_offset == io->scsiio.kern_total_len || 2562 buffer_offset == expected_len) 2563 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2564 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2565 cfiscsi_pdu_queue(response); 2566 } 2567 2568 io->scsiio.be_move_done(io); 2569} 2570 2571static void 2572cfiscsi_datamove_out(union ctl_io *io) 2573{ 2574 struct cfiscsi_session *cs; 2575 struct icl_pdu *request, *response; 2576 const struct iscsi_bhs_scsi_command *bhssc; 2577 struct iscsi_bhs_r2t *bhsr2t; 2578 struct cfiscsi_data_wait *cdw; 2579 uint32_t target_transfer_tag; 2580 bool done; 2581 2582 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2583 cs = PDU_SESSION(request); 2584 2585 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2586 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2587 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2588 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2589 2590 /* 2591 * We need to record it so that we can properly report 2592 * underflow/underflow. 2593 */ 2594 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2595 2596 /* 2597 * We hadn't received anything during this datamove yet. 2598 */ 2599 io->scsiio.ext_data_filled = 0; 2600 2601 target_transfer_tag = 2602 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2603 2604#if 0 2605 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2606 "task tag 0x%x, target transfer tag 0x%x", 2607 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2608#endif 2609 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2610 if (cdw == NULL) { 2611 CFISCSI_SESSION_WARN(cs, "failed to " 2612 "allocate memory; dropping connection"); 2613 ctl_set_busy(&io->scsiio); 2614 io->scsiio.be_move_done(io); 2615 cfiscsi_session_terminate(cs); 2616 return; 2617 } 2618 cdw->cdw_ctl_io = io; 2619 cdw->cdw_target_transfer_tag = target_transfer_tag; 2620 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2621 2622 if (cs->cs_immediate_data && io->scsiio.kern_rel_offset == 0 && 2623 icl_pdu_data_segment_length(request) > 0) { 2624 done = cfiscsi_handle_data_segment(request, cdw); 2625 if (done) { 2626 uma_zfree(cfiscsi_data_wait_zone, cdw); 2627 io->scsiio.be_move_done(io); 2628 return; 2629 } 2630 } 2631 2632 CFISCSI_SESSION_LOCK(cs); 2633 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2634 CFISCSI_SESSION_UNLOCK(cs); 2635 2636 /* 2637 * XXX: We should limit the number of outstanding R2T PDUs 2638 * per task to MaxOutstandingR2T. 2639 */ 2640 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2641 if (response == NULL) { 2642 CFISCSI_SESSION_WARN(cs, "failed to " 2643 "allocate memory; dropping connection"); 2644 ctl_set_busy(&io->scsiio); 2645 io->scsiio.be_move_done(io); 2646 cfiscsi_session_terminate(cs); 2647 return; 2648 } 2649 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2650 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2651 bhsr2t->bhsr2t_flags = 0x80; 2652 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2653 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2654 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2655 /* 2656 * XXX: Here we assume that cfiscsi_datamove() won't ever 2657 * be running concurrently on several CPUs for a given 2658 * command. 2659 */ 2660 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2661 PDU_R2TSN(request)++; 2662 /* 2663 * This is the offset within the current SCSI command; 2664 * i.e. for the first call of datamove(), it will be 0, 2665 * and for subsequent ones it will be the sum of lengths 2666 * of previous ones. 2667 * 2668 * The ext_data_filled is to account for unsolicited 2669 * (immediate) data that might have already arrived. 2670 */ 2671 bhsr2t->bhsr2t_buffer_offset = 2672 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2673 /* 2674 * This is the total length (sum of S/G lengths) this call 2675 * to cfiscsi_datamove() is supposed to handle. 2676 * 2677 * XXX: Limit it to MaxBurstLength. 2678 */ 2679 bhsr2t->bhsr2t_desired_data_transfer_length = 2680 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2681 cfiscsi_pdu_queue(response); 2682} 2683 2684static void 2685cfiscsi_datamove(union ctl_io *io) 2686{ 2687 2688 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2689 cfiscsi_datamove_in(io); 2690 else 2691 cfiscsi_datamove_out(io); 2692} 2693 2694static void 2695cfiscsi_scsi_command_done(union ctl_io *io) 2696{ 2697 struct icl_pdu *request, *response; 2698 struct iscsi_bhs_scsi_command *bhssc; 2699 struct iscsi_bhs_scsi_response *bhssr; 2700#ifdef DIAGNOSTIC 2701 struct cfiscsi_data_wait *cdw; 2702#endif 2703 struct cfiscsi_session *cs; 2704 uint16_t sense_length; 2705 2706 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2707 cs = PDU_SESSION(request); 2708 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2709 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2710 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2711 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2712 2713 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2714 // bhssc->bhssc_initiator_task_tag); 2715 2716#ifdef DIAGNOSTIC 2717 CFISCSI_SESSION_LOCK(cs); 2718 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2719 KASSERT(bhssc->bhssc_initiator_task_tag != 2720 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2721 CFISCSI_SESSION_UNLOCK(cs); 2722#endif 2723 2724 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2725 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2726 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2727 bhssr->bhssr_flags = 0x80; 2728 /* 2729 * XXX: We don't deal with bidirectional under/overflows; 2730 * does anything actually support those? 2731 */ 2732 if (PDU_TOTAL_TRANSFER_LEN(request) < 2733 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2734 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2735 bhssr->bhssr_residual_count = 2736 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2737 PDU_TOTAL_TRANSFER_LEN(request)); 2738 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2739 // ntohl(bhssr->bhssr_residual_count)); 2740 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2741 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2742 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2743 bhssr->bhssr_residual_count = 2744 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2745 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2746 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2747 // ntohl(bhssr->bhssr_residual_count)); 2748 } 2749 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2750 bhssr->bhssr_status = io->scsiio.scsi_status; 2751 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2752 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2753 2754 if (io->scsiio.sense_len > 0) { 2755#if 0 2756 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2757 io->scsiio.sense_len); 2758#endif 2759 sense_length = htons(io->scsiio.sense_len); 2760 icl_pdu_append_data(response, 2761 &sense_length, sizeof(sense_length), M_WAITOK); 2762 icl_pdu_append_data(response, 2763 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2764 } 2765 2766 ctl_free_io(io); 2767 icl_pdu_free(request); 2768 cfiscsi_pdu_queue(response); 2769} 2770 2771static void 2772cfiscsi_task_management_done(union ctl_io *io) 2773{ 2774 struct icl_pdu *request, *response; 2775 struct iscsi_bhs_task_management_request *bhstmr; 2776 struct iscsi_bhs_task_management_response *bhstmr2; 2777 struct cfiscsi_data_wait *cdw, *tmpcdw; 2778 struct cfiscsi_session *cs; 2779 2780 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2781 cs = PDU_SESSION(request); 2782 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2783 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2784 ISCSI_BHS_OPCODE_TASK_REQUEST, 2785 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2786 2787#if 0 2788 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2789 bhstmr->bhstmr_initiator_task_tag, 2790 bhstmr->bhstmr_referenced_task_tag); 2791#endif 2792 2793 if ((bhstmr->bhstmr_function & ~0x80) == 2794 BHSTMR_FUNCTION_ABORT_TASK) { 2795 /* 2796 * Make sure we no longer wait for Data-Out for this command. 2797 */ 2798 CFISCSI_SESSION_LOCK(cs); 2799 TAILQ_FOREACH_SAFE(cdw, 2800 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2801 if (bhstmr->bhstmr_referenced_task_tag != 2802 cdw->cdw_initiator_task_tag) 2803 continue; 2804 2805#if 0 2806 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2807 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2808#endif 2809 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2810 cdw, cdw_next); 2811 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2812 uma_zfree(cfiscsi_data_wait_zone, cdw); 2813 } 2814 CFISCSI_SESSION_UNLOCK(cs); 2815 } 2816 2817 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2818 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2819 response->ip_bhs; 2820 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2821 bhstmr2->bhstmr_flags = 0x80; 2822 if (io->io_hdr.status == CTL_SUCCESS) { 2823 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2824 } else { 2825 /* 2826 * XXX: How to figure out what exactly went wrong? iSCSI spec 2827 * expects us to provide detailed error, e.g. "Task does 2828 * not exist" or "LUN does not exist". 2829 */ 2830 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2831 bhstmr2->bhstmr_response = 2832 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2833 } 2834 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2835 2836 ctl_free_io(io); 2837 icl_pdu_free(request); 2838 cfiscsi_pdu_queue(response); 2839} 2840 2841static void 2842cfiscsi_done(union ctl_io *io) 2843{ 2844 struct icl_pdu *request; 2845 struct cfiscsi_session *cs; 2846 2847 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2848 ("invalid CTL status %#x", io->io_hdr.status)); 2849 2850 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2851 if (request == NULL) { 2852 /* 2853 * Implicit task termination has just completed; nothing to do. 2854 */ 2855 return; 2856 } 2857 2858 cs = PDU_SESSION(request); 2859 refcount_release(&cs->cs_outstanding_ctl_pdus); 2860 2861 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2862 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2863 cfiscsi_scsi_command_done(io); 2864 break; 2865 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2866 cfiscsi_task_management_done(io); 2867 break; 2868 default: 2869 panic("cfiscsi_done called with wrong opcode 0x%x", 2870 request->ip_bhs->bhs_opcode); 2871 } 2872} 2873