ctl_frontend_iscsi.c revision 265490
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 265490 2014-05-07 06:18:03Z trasz $ 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 265490 2014-05-07 06:18:03Z trasz $"); 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 "ctl_frontend_iscsi.h" 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 79static uma_zone_t cfiscsi_data_wait_zone; 80 81SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 82 "CAM Target Layer iSCSI Frontend"); 83static int debug = 3; 84TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 85SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RW, 86 &debug, 1, "Enable debug messages"); 87static int ping_timeout = 5; 88TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RW, 90 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 91static int login_timeout = 60; 92TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RW, 94 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 95static int maxcmdsn_delta = 256; 96TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RW, 98 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 99 "without confirmation"); 100 101#define CFISCSI_DEBUG(X, ...) \ 102 if (debug > 1) { \ 103 printf("%s: " X "\n", __func__, ## __VA_ARGS__);\ 104 } while (0) 105 106#define CFISCSI_WARN(X, ...) \ 107 if (debug > 0) { \ 108 printf("WARNING: %s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } while (0) 111 112#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 113 if (debug > 1) { \ 114 printf("%s: %s (%s): " X "\n", \ 115 __func__, S->cs_initiator_addr, \ 116 S->cs_initiator_name, ## __VA_ARGS__); \ 117 } while (0) 118 119#define CFISCSI_SESSION_WARN(S, X, ...) \ 120 if (debug > 0) { \ 121 printf("WARNING: %s (%s): " X "\n", \ 122 S->cs_initiator_addr, \ 123 S->cs_initiator_name, ## __VA_ARGS__); \ 124 } while (0) 125 126#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 127#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 128#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 129 130#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 131#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 132#define PDU_EXPDATASN(X) (X)->ip_prv0 133#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 134#define PDU_R2TSN(X) (X)->ip_prv2 135 136int cfiscsi_init(void); 137static void cfiscsi_online(void *arg); 138static void cfiscsi_offline(void *arg); 139static int cfiscsi_targ_enable(void *arg, struct ctl_id targ_id); 140static int cfiscsi_targ_disable(void *arg, struct ctl_id targ_id); 141static int cfiscsi_lun_enable(void *arg, 142 struct ctl_id target_id, int lun_id); 143static int cfiscsi_lun_disable(void *arg, 144 struct ctl_id target_id, int lun_id); 145static int cfiscsi_ioctl(struct cdev *dev, 146 u_long cmd, caddr_t addr, int flag, struct thread *td); 147static int cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len); 148static void cfiscsi_datamove(union ctl_io *io); 149static void cfiscsi_done(union ctl_io *io); 150static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun); 151static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 152static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 153static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 154static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 155static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 156static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 157static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 158static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 159 *softc, const char *name); 160static void cfiscsi_target_release(struct cfiscsi_target *ct); 161static void cfiscsi_session_delete(struct cfiscsi_session *cs); 162 163static struct cfiscsi_softc cfiscsi_softc; 164extern struct ctl_softc *control_softc; 165 166static int cfiscsi_module_event_handler(module_t, int /*modeventtype_t*/, void *); 167 168static moduledata_t cfiscsi_moduledata = { 169 "ctlcfiscsi", 170 cfiscsi_module_event_handler, 171 NULL 172}; 173 174DECLARE_MODULE(ctlcfiscsi, cfiscsi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH); 175MODULE_VERSION(ctlcfiscsi, 1); 176MODULE_DEPEND(ctlcfiscsi, ctl, 1, 1, 1); 177MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 178 179static struct icl_pdu * 180cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 181{ 182 183 return (icl_pdu_new_bhs(request->ip_conn, flags)); 184} 185 186static bool 187cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 188{ 189 const struct iscsi_bhs_scsi_command *bhssc; 190 struct cfiscsi_session *cs; 191 uint32_t cmdsn, expstatsn; 192 193 cs = PDU_SESSION(request); 194 195 /* 196 * Every incoming PDU - not just NOP-Out - resets the ping timer. 197 * The purpose of the timeout is to reset the connection when it stalls; 198 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 199 * in some queue. 200 * 201 * XXX: Locking? 202 */ 203 cs->cs_timeout = 0; 204 205 /* 206 * Data-Out PDUs don't contain CmdSN. 207 */ 208 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 209 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 210 return (false); 211 212 /* 213 * We're only using fields common for all the request 214 * (initiator -> target) PDUs. 215 */ 216 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 217 cmdsn = ntohl(bhssc->bhssc_cmdsn); 218 expstatsn = ntohl(bhssc->bhssc_expstatsn); 219 220 CFISCSI_SESSION_LOCK(cs); 221#if 0 222 if (expstatsn != cs->cs_statsn) { 223 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 224 "while current StatSN is %d", expstatsn, 225 cs->cs_statsn); 226 } 227#endif 228 229 /* 230 * The target MUST silently ignore any non-immediate command outside 231 * of this range. 232 */ 233 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 234 CFISCSI_SESSION_UNLOCK(cs); 235 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 236 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 237 return (true); 238 } 239 240 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 241 cs->cs_cmdsn++; 242 243 CFISCSI_SESSION_UNLOCK(cs); 244 245 return (false); 246} 247 248static void 249cfiscsi_pdu_handle(struct icl_pdu *request) 250{ 251 struct cfiscsi_session *cs; 252 bool ignore; 253 254 cs = PDU_SESSION(request); 255 256 ignore = cfiscsi_pdu_update_cmdsn(request); 257 if (ignore) { 258 icl_pdu_free(request); 259 return; 260 } 261 262 /* 263 * Handle the PDU; this includes e.g. receiving the remaining 264 * part of PDU and submitting the SCSI command to CTL 265 * or queueing a reply. The handling routine is responsible 266 * for freeing the PDU when it's no longer needed. 267 */ 268 switch (request->ip_bhs->bhs_opcode & 269 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 270 case ISCSI_BHS_OPCODE_NOP_OUT: 271 cfiscsi_pdu_handle_nop_out(request); 272 break; 273 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 274 cfiscsi_pdu_handle_scsi_command(request); 275 break; 276 case ISCSI_BHS_OPCODE_TASK_REQUEST: 277 cfiscsi_pdu_handle_task_request(request); 278 break; 279 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 280 cfiscsi_pdu_handle_data_out(request); 281 break; 282 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 283 cfiscsi_pdu_handle_logout_request(request); 284 break; 285 default: 286 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 287 "opcode 0x%x; dropping connection", 288 request->ip_bhs->bhs_opcode); 289 icl_pdu_free(request); 290 cfiscsi_session_terminate(cs); 291 } 292 293} 294 295static void 296cfiscsi_receive_callback(struct icl_pdu *request) 297{ 298 struct cfiscsi_session *cs; 299 300 cs = PDU_SESSION(request); 301 302#ifdef ICL_KERNEL_PROXY 303 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 304 if (cs->cs_login_pdu == NULL) 305 cs->cs_login_pdu = request; 306 else 307 icl_pdu_free(request); 308 cv_signal(&cs->cs_login_cv); 309 return; 310 } 311#endif 312 313 cfiscsi_pdu_handle(request); 314} 315 316static void 317cfiscsi_error_callback(struct icl_conn *ic) 318{ 319 struct cfiscsi_session *cs; 320 321 cs = CONN_SESSION(ic); 322 323 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 324 cfiscsi_session_terminate(cs); 325} 326 327static int 328cfiscsi_pdu_prepare(struct icl_pdu *response) 329{ 330 struct cfiscsi_session *cs; 331 struct iscsi_bhs_scsi_response *bhssr; 332 bool advance_statsn = true; 333 334 cs = PDU_SESSION(response); 335 336 CFISCSI_SESSION_LOCK_ASSERT(cs); 337 338 /* 339 * We're only using fields common for all the response 340 * (target -> initiator) PDUs. 341 */ 342 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 343 344 /* 345 * 10.8.3: "The StatSN for this connection is not advanced 346 * after this PDU is sent." 347 */ 348 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 349 advance_statsn = false; 350 351 /* 352 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 353 * StatSN for the connection is not advanced after this PDU is sent." 354 */ 355 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 356 bhssr->bhssr_initiator_task_tag == 0xffffffff) 357 advance_statsn = false; 358 359 /* 360 * See the comment below - StatSN is not meaningful and must 361 * not be advanced. 362 */ 363 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 364 advance_statsn = false; 365 366 /* 367 * 10.7.3: "The fields StatSN, Status, and Residual Count 368 * only have meaningful content if the S bit is set to 1." 369 */ 370 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 371 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 372 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 373 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 374 375 if (advance_statsn) 376 cs->cs_statsn++; 377 378 return (0); 379} 380 381static void 382cfiscsi_pdu_queue(struct icl_pdu *response) 383{ 384 struct cfiscsi_session *cs; 385 386 cs = PDU_SESSION(response); 387 388 CFISCSI_SESSION_LOCK(cs); 389 cfiscsi_pdu_prepare(response); 390 icl_pdu_queue(response); 391 CFISCSI_SESSION_UNLOCK(cs); 392} 393 394static uint32_t 395cfiscsi_decode_lun(uint64_t encoded) 396{ 397 uint8_t lun[8]; 398 uint32_t result; 399 400 /* 401 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 402 * but is in fact an evil, multidimensional structure defined 403 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 404 */ 405 memcpy(lun, &encoded, sizeof(lun)); 406 switch (lun[0] & 0xC0) { 407 case 0x00: 408 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 409 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 410 CFISCSI_WARN("malformed LUN " 411 "(peripheral device addressing method): 0x%jx", 412 (uintmax_t)encoded); 413 result = 0xffffffff; 414 break; 415 } 416 result = lun[1]; 417 break; 418 case 0x40: 419 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 420 lun[6] != 0 || lun[7] != 0) { 421 CFISCSI_WARN("malformed LUN " 422 "(flat address space addressing method): 0x%jx", 423 (uintmax_t)encoded); 424 result = 0xffffffff; 425 break; 426 } 427 result = ((lun[0] & 0x3f) << 8) + lun[1]; 428 break; 429 case 0xC0: 430 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 431 lun[6] != 0 || lun[7] != 0) { 432 CFISCSI_WARN("malformed LUN (extended flat " 433 "address space addressing method): 0x%jx", 434 (uintmax_t)encoded); 435 result = 0xffffffff; 436 break; 437 } 438 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 439 default: 440 CFISCSI_WARN("unsupported LUN format 0x%jx", 441 (uintmax_t)encoded); 442 result = 0xffffffff; 443 break; 444 } 445 446 return (result); 447} 448 449static void 450cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 451{ 452 struct cfiscsi_session *cs; 453 struct iscsi_bhs_nop_out *bhsno; 454 struct iscsi_bhs_nop_in *bhsni; 455 struct icl_pdu *response; 456 void *data = NULL; 457 size_t datasize; 458 int error; 459 460 cs = PDU_SESSION(request); 461 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 462 463 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 464 /* 465 * Nothing to do, iscsi_pdu_update_statsn() already 466 * zeroed the timeout. 467 */ 468 icl_pdu_free(request); 469 return; 470 } 471 472 datasize = icl_pdu_data_segment_length(request); 473 if (datasize > 0) { 474 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 475 if (data == NULL) { 476 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 477 "dropping connection"); 478 icl_pdu_free(request); 479 cfiscsi_session_terminate(cs); 480 return; 481 } 482 icl_pdu_get_data(request, 0, data, datasize); 483 } 484 485 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 486 if (response == NULL) { 487 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 488 "droppping connection"); 489 free(data, M_CFISCSI); 490 icl_pdu_free(request); 491 cfiscsi_session_terminate(cs); 492 return; 493 } 494 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 495 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 496 bhsni->bhsni_flags = 0x80; 497 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 498 bhsni->bhsni_target_transfer_tag = 0xffffffff; 499 if (datasize > 0) { 500 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 501 if (error != 0) { 502 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 503 "dropping connection"); 504 free(data, M_CFISCSI); 505 icl_pdu_free(request); 506 icl_pdu_free(response); 507 cfiscsi_session_terminate(cs); 508 return; 509 } 510 free(data, M_CFISCSI); 511 } 512 513 icl_pdu_free(request); 514 cfiscsi_pdu_queue(response); 515} 516 517static void 518cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 519{ 520 struct iscsi_bhs_scsi_command *bhssc; 521 struct cfiscsi_session *cs; 522 union ctl_io *io; 523 int error; 524 525 cs = PDU_SESSION(request); 526 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 527 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 528 // bhssc->bhssc_initiator_task_tag); 529 530 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 531 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 532 "ImmediateData=No; dropping connection"); 533 icl_pdu_free(request); 534 cfiscsi_session_terminate(cs); 535 return; 536 } 537 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 538 if (io == NULL) { 539 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 540 "dropping connection"); 541 icl_pdu_free(request); 542 cfiscsi_session_terminate(cs); 543 return; 544 } 545 ctl_zero_io(io); 546 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 547 io->io_hdr.io_type = CTL_IO_SCSI; 548 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 549 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 550 io->io_hdr.nexus.targ_target.id = 0; 551 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 552 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 553 io->io_hdr.nexus.lun_map_arg = cs; 554 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 555 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 556 case BHSSC_FLAGS_ATTR_UNTAGGED: 557 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 558 break; 559 case BHSSC_FLAGS_ATTR_SIMPLE: 560 io->scsiio.tag_type = CTL_TAG_SIMPLE; 561 break; 562 case BHSSC_FLAGS_ATTR_ORDERED: 563 io->scsiio.tag_type = CTL_TAG_ORDERED; 564 break; 565 case BHSSC_FLAGS_ATTR_HOQ: 566 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 567 break; 568 case BHSSC_FLAGS_ATTR_ACA: 569 io->scsiio.tag_type = CTL_TAG_ACA; 570 break; 571 default: 572 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 573 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 574 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 575 break; 576 } 577 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 578 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 579 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 580 error = ctl_queue(io); 581 if (error != CTL_RETVAL_COMPLETE) { 582 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 583 "dropping connection", error); 584 ctl_free_io(io); 585 refcount_release(&cs->cs_outstanding_ctl_pdus); 586 icl_pdu_free(request); 587 cfiscsi_session_terminate(cs); 588 } 589} 590 591static void 592cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 593{ 594 struct iscsi_bhs_task_management_request *bhstmr; 595 struct iscsi_bhs_task_management_response *bhstmr2; 596 struct icl_pdu *response; 597 struct cfiscsi_session *cs; 598 union ctl_io *io; 599 int error; 600 601 cs = PDU_SESSION(request); 602 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 603 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 604 if (io == NULL) { 605 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 606 "dropping connection"); 607 icl_pdu_free(request); 608 cfiscsi_session_terminate(cs); 609 return; 610 } 611 ctl_zero_io(io); 612 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 613 io->io_hdr.io_type = CTL_IO_TASK; 614 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 615 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 616 io->io_hdr.nexus.targ_target.id = 0; 617 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 618 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 619 io->io_hdr.nexus.lun_map_arg = cs; 620 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 621 622 switch (bhstmr->bhstmr_function & ~0x80) { 623 case BHSTMR_FUNCTION_ABORT_TASK: 624#if 0 625 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 626#endif 627 io->taskio.task_action = CTL_TASK_ABORT_TASK; 628 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 629 break; 630 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 631#if 0 632 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 633#endif 634 io->taskio.task_action = CTL_TASK_LUN_RESET; 635 break; 636 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 637#if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 639#endif 640 io->taskio.task_action = CTL_TASK_TARGET_RESET; 641 break; 642 default: 643 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 644 bhstmr->bhstmr_function & ~0x80); 645 ctl_free_io(io); 646 647 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 648 if (response == NULL) { 649 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 650 "dropping connection"); 651 icl_pdu_free(request); 652 cfiscsi_session_terminate(cs); 653 return; 654 } 655 bhstmr2 = (struct iscsi_bhs_task_management_response *) 656 response->ip_bhs; 657 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 658 bhstmr2->bhstmr_flags = 0x80; 659 bhstmr2->bhstmr_response = 660 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 661 bhstmr2->bhstmr_initiator_task_tag = 662 bhstmr->bhstmr_initiator_task_tag; 663 icl_pdu_free(request); 664 cfiscsi_pdu_queue(response); 665 return; 666 } 667 668 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 669 error = ctl_queue(io); 670 if (error != CTL_RETVAL_COMPLETE) { 671 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 672 "dropping connection", error); 673 ctl_free_io(io); 674 refcount_release(&cs->cs_outstanding_ctl_pdus); 675 icl_pdu_free(request); 676 cfiscsi_session_terminate(cs); 677 } 678} 679 680static bool 681cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 682{ 683 struct iscsi_bhs_data_out *bhsdo; 684 struct cfiscsi_session *cs; 685 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 686 size_t copy_len, len, off, buffer_offset; 687 int ctl_sg_count; 688 union ctl_io *io; 689 690 cs = PDU_SESSION(request); 691 692 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 693 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 694 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 695 ISCSI_BHS_OPCODE_SCSI_COMMAND, 696 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 697 698 /* 699 * We're only using fields common for Data Out and SCSI Command PDUs. 700 */ 701 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 702 703 io = cdw->cdw_ctl_io; 704 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 705 ("CTL_FLAG_DATA_IN")); 706 707#if 0 708 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 709 request->ip_data_len, io->scsiio.kern_total_len); 710#endif 711 712 if (io->scsiio.kern_sg_entries > 0) { 713 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 714 ctl_sg_count = io->scsiio.kern_sg_entries; 715 } else { 716 ctl_sglist = &ctl_sg_entry; 717 ctl_sglist->addr = io->scsiio.kern_data_ptr; 718 ctl_sglist->len = io->scsiio.kern_data_len; 719 ctl_sg_count = 1; 720 } 721 722 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 723 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 724 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 725 else 726 buffer_offset = 0; 727 728 /* 729 * Make sure the offset, as sent by the initiator, matches the offset 730 * we're supposed to be at in the scatter-gather list. 731 */ 732 if (buffer_offset != io->scsiio.ext_data_filled) { 733 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 734 "expected %zd", buffer_offset, 735 (size_t)io->scsiio.ext_data_filled); 736 cfiscsi_session_terminate(cs); 737 return (true); 738 } 739 740 /* 741 * This is the offset within the PDU data segment, as opposed 742 * to buffer_offset, which is the offset within the task (SCSI 743 * command). 744 */ 745 off = 0; 746 len = icl_pdu_data_segment_length(request); 747 748 /* 749 * Iterate over the scatter/gather segments, filling them with data 750 * from the PDU data segment. Note that this can get called multiple 751 * times for one SCSI command; the cdw structure holds state for the 752 * scatter/gather list. 753 */ 754 for (;;) { 755 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 756 ("cdw->cdw_sg_index >= ctl_sg_count")); 757 if (cdw->cdw_sg_len == 0) { 758 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 759 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 760 } 761 KASSERT(off <= len, ("len > off")); 762 copy_len = len - off; 763 if (copy_len > cdw->cdw_sg_len) 764 copy_len = cdw->cdw_sg_len; 765 766 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 767 cdw->cdw_sg_addr += copy_len; 768 cdw->cdw_sg_len -= copy_len; 769 off += copy_len; 770 io->scsiio.ext_data_filled += copy_len; 771 772 if (cdw->cdw_sg_len == 0) { 773 /* 774 * End of current segment. 775 */ 776 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 777 /* 778 * Last segment in scatter/gather list. 779 */ 780 break; 781 } 782 cdw->cdw_sg_index++; 783 } 784 785 if (off == len) { 786 /* 787 * End of PDU payload. 788 */ 789 break; 790 } 791 } 792 793 if (len > off) { 794 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 795 "expected %zd", icl_pdu_data_segment_length(request), off); 796 cfiscsi_session_terminate(cs); 797 return (true); 798 } 799 800 if (bhsdo->bhsdo_flags & BHSDO_FLAGS_F || 801 io->scsiio.ext_data_filled == io->scsiio.kern_total_len) { 802 if ((bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 803 CFISCSI_SESSION_WARN(cs, "got the final packet without " 804 "the F flag; flags = 0x%x; dropping connection", 805 bhsdo->bhsdo_flags); 806 cfiscsi_session_terminate(cs); 807 return (true); 808 } 809 810 if (io->scsiio.ext_data_filled != io->scsiio.kern_total_len) { 811 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 812 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 813 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 814 "transmitted size was %zd bytes instead of %d; " 815 "dropping connection", 816 (size_t)io->scsiio.ext_data_filled, 817 io->scsiio.kern_total_len); 818 cfiscsi_session_terminate(cs); 819 return (true); 820 } else { 821 /* 822 * For SCSI Command PDU, this just means we need to 823 * solicit more data by sending R2T. 824 */ 825 return (false); 826 } 827 } 828#if 0 829 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 830 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 831#endif 832 833 return (true); 834 } 835 836 return (false); 837} 838 839static void 840cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 841{ 842 struct iscsi_bhs_data_out *bhsdo; 843 struct cfiscsi_session *cs; 844 struct cfiscsi_data_wait *cdw = NULL; 845 union ctl_io *io; 846 bool done; 847 848 cs = PDU_SESSION(request); 849 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 850 851 CFISCSI_SESSION_LOCK(cs); 852 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 853#if 0 854 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 855 "ttt 0x%x, itt 0x%x", 856 bhsdo->bhsdo_target_transfer_tag, 857 bhsdo->bhsdo_initiator_task_tag, 858 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 859#endif 860 if (bhsdo->bhsdo_target_transfer_tag == 861 cdw->cdw_target_transfer_tag) 862 break; 863 } 864 CFISCSI_SESSION_UNLOCK(cs); 865 if (cdw == NULL) { 866 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 867 "0x%x, not found; dropping connection", 868 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 869 icl_pdu_free(request); 870 cfiscsi_session_terminate(cs); 871 return; 872 } 873 874 io = cdw->cdw_ctl_io; 875 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 876 ("CTL_FLAG_DATA_IN")); 877 878 done = cfiscsi_handle_data_segment(request, cdw); 879 if (done) { 880 CFISCSI_SESSION_LOCK(cs); 881 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 882 CFISCSI_SESSION_UNLOCK(cs); 883 uma_zfree(cfiscsi_data_wait_zone, cdw); 884 io->scsiio.be_move_done(io); 885 } 886 887 icl_pdu_free(request); 888} 889 890static void 891cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 892{ 893 struct iscsi_bhs_logout_request *bhslr; 894 struct iscsi_bhs_logout_response *bhslr2; 895 struct icl_pdu *response; 896 struct cfiscsi_session *cs; 897 898 cs = PDU_SESSION(request); 899 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 900 switch (bhslr->bhslr_reason & 0x7f) { 901 case BHSLR_REASON_CLOSE_SESSION: 902 case BHSLR_REASON_CLOSE_CONNECTION: 903 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 904 if (response == NULL) { 905 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 906 icl_pdu_free(request); 907 cfiscsi_session_terminate(cs); 908 return; 909 } 910 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 911 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 912 bhslr2->bhslr_flags = 0x80; 913 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 914 bhslr2->bhslr_initiator_task_tag = 915 bhslr->bhslr_initiator_task_tag; 916 icl_pdu_free(request); 917 cfiscsi_pdu_queue(response); 918 cfiscsi_session_terminate(cs); 919 break; 920 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 921 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 922 if (response == NULL) { 923 CFISCSI_SESSION_WARN(cs, 924 "failed to allocate memory; dropping connection"); 925 icl_pdu_free(request); 926 cfiscsi_session_terminate(cs); 927 return; 928 } 929 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 930 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 931 bhslr2->bhslr_flags = 0x80; 932 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 933 bhslr2->bhslr_initiator_task_tag = 934 bhslr->bhslr_initiator_task_tag; 935 icl_pdu_free(request); 936 cfiscsi_pdu_queue(response); 937 break; 938 default: 939 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 940 bhslr->bhslr_reason); 941 icl_pdu_free(request); 942 cfiscsi_session_terminate(cs); 943 break; 944 } 945} 946 947static void 948cfiscsi_callout(void *context) 949{ 950 struct icl_pdu *cp; 951 struct iscsi_bhs_nop_in *bhsni; 952 struct cfiscsi_session *cs; 953 954 cs = context; 955 956 if (cs->cs_terminating) 957 return; 958 959 callout_schedule(&cs->cs_callout, 1 * hz); 960 961 CFISCSI_SESSION_LOCK(cs); 962 cs->cs_timeout++; 963 CFISCSI_SESSION_UNLOCK(cs); 964 965#ifdef ICL_KERNEL_PROXY 966 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 967 if (cs->cs_timeout > login_timeout) { 968 CFISCSI_SESSION_WARN(cs, "login timed out after " 969 "%d seconds; dropping connection", cs->cs_timeout); 970 cfiscsi_session_terminate(cs); 971 } 972 return; 973 } 974#endif 975 976 if (cs->cs_timeout >= ping_timeout) { 977 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 978 "dropping connection", ping_timeout); 979 cfiscsi_session_terminate(cs); 980 return; 981 } 982 983 /* 984 * If the ping was reset less than one second ago - which means 985 * that we've received some PDU during the last second - assume 986 * the traffic flows correctly and don't bother sending a NOP-Out. 987 * 988 * (It's 2 - one for one second, and one for incrementing is_timeout 989 * earlier in this routine.) 990 */ 991 if (cs->cs_timeout < 2) 992 return; 993 994 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 995 if (cp == NULL) { 996 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 997 return; 998 } 999 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1000 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1001 bhsni->bhsni_flags = 0x80; 1002 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1003 1004 cfiscsi_pdu_queue(cp); 1005} 1006 1007static void 1008cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1009{ 1010 struct cfiscsi_data_wait *cdw, *tmpcdw; 1011 union ctl_io *io; 1012 int error; 1013 1014#ifdef notyet 1015 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1016 if (io == NULL) { 1017 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1018 return; 1019 } 1020 ctl_zero_io(io); 1021 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1022 io->io_hdr.io_type = CTL_IO_TASK; 1023 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1024 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1025 io->io_hdr.nexus.targ_target.id = 0; 1026 io->io_hdr.nexus.targ_lun = lun; 1027 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1028 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1029 error = ctl_queue(io); 1030 if (error != CTL_RETVAL_COMPLETE) { 1031 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1032 ctl_free_io(io); 1033 } 1034#else 1035 /* 1036 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1037 * just iterate over tasks that are waiting for something - data - and 1038 * terminate those. 1039 */ 1040 CFISCSI_SESSION_LOCK(cs); 1041 TAILQ_FOREACH_SAFE(cdw, 1042 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1043 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1044 if (io == NULL) { 1045 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1046 return; 1047 } 1048 ctl_zero_io(io); 1049 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1050 io->io_hdr.io_type = CTL_IO_TASK; 1051 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1052 io->io_hdr.nexus.targ_port = 1053 cs->cs_target->ct_softc->fe.targ_port; 1054 io->io_hdr.nexus.targ_target.id = 0; 1055 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1056 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1057 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1058 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1059 error = ctl_queue(io); 1060 if (error != CTL_RETVAL_COMPLETE) { 1061 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1062 ctl_free_io(io); 1063 return; 1064 } 1065#if 0 1066 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1067 "0x%x", cdw->cdw_initiator_task_tag); 1068#endif 1069 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1070 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1071 uma_zfree(cfiscsi_data_wait_zone, cdw); 1072 } 1073 CFISCSI_SESSION_UNLOCK(cs); 1074#endif 1075} 1076 1077static void 1078cfiscsi_maintenance_thread(void *arg) 1079{ 1080 struct cfiscsi_session *cs; 1081 1082 cs = arg; 1083 1084 for (;;) { 1085 CFISCSI_SESSION_LOCK(cs); 1086 if (cs->cs_terminating == false) 1087 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1088 CFISCSI_SESSION_UNLOCK(cs); 1089 1090 if (cs->cs_terminating) { 1091 cfiscsi_session_terminate_tasks(cs); 1092 callout_drain(&cs->cs_callout); 1093 1094 icl_conn_shutdown(cs->cs_conn); 1095 icl_conn_close(cs->cs_conn); 1096 1097 cs->cs_terminating++; 1098 1099 /* 1100 * XXX: We used to wait up to 30 seconds to deliver queued PDUs 1101 * to the initiator. We also tried hard to deliver SCSI Responses 1102 * for the aborted PDUs. We don't do that anymore. We might need 1103 * to revisit that. 1104 */ 1105 1106 cfiscsi_session_delete(cs); 1107 kthread_exit(); 1108 return; 1109 } 1110 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1111 } 1112} 1113 1114static void 1115cfiscsi_session_terminate(struct cfiscsi_session *cs) 1116{ 1117 1118 if (cs->cs_terminating != 0) 1119 return; 1120 cs->cs_terminating = 1; 1121 cv_signal(&cs->cs_maintenance_cv); 1122} 1123 1124static int 1125cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1126{ 1127 int error, i; 1128 struct cfiscsi_softc *softc; 1129 1130 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1131 1132 softc = &cfiscsi_softc; 1133 1134 mtx_lock(&softc->lock); 1135 for (i = 0; i < softc->max_initiators; i++) { 1136 if (softc->ctl_initids[i] == 0) 1137 break; 1138 } 1139 if (i == softc->max_initiators) { 1140 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1141 softc->max_initiators); 1142 mtx_unlock(&softc->lock); 1143 return (1); 1144 } 1145 softc->ctl_initids[i] = 1; 1146 mtx_unlock(&softc->lock); 1147 1148#if 0 1149 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1150 i, softc->max_initiators); 1151#endif 1152 cs->cs_ctl_initid = i; 1153 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1154 if (error != 0) { 1155 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1156 mtx_lock(&softc->lock); 1157 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1158 mtx_unlock(&softc->lock); 1159 cs->cs_ctl_initid = -1; 1160 return (1); 1161 } 1162 1163 return (0); 1164} 1165 1166static void 1167cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1168{ 1169 int error; 1170 struct cfiscsi_softc *softc; 1171 1172 if (cs->cs_ctl_initid == -1) 1173 return; 1174 1175 softc = &cfiscsi_softc; 1176 1177 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1178 if (error != 0) { 1179 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1180 error); 1181 } 1182 mtx_lock(&softc->lock); 1183 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1184 mtx_unlock(&softc->lock); 1185 cs->cs_ctl_initid = -1; 1186} 1187 1188static struct cfiscsi_session * 1189cfiscsi_session_new(struct cfiscsi_softc *softc) 1190{ 1191 struct cfiscsi_session *cs; 1192 int error; 1193 1194 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1195 if (cs == NULL) { 1196 CFISCSI_WARN("malloc failed"); 1197 return (NULL); 1198 } 1199 cs->cs_ctl_initid = -1; 1200 1201 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1202 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1203 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1204 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1205#ifdef ICL_KERNEL_PROXY 1206 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1207#endif 1208 1209 cs->cs_conn = icl_conn_new(); 1210 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1211 cs->cs_conn->ic_error = cfiscsi_error_callback; 1212 cs->cs_conn->ic_prv0 = cs; 1213 1214 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1215 if (error != 0) { 1216 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1217 free(cs, M_CFISCSI); 1218 return (NULL); 1219 } 1220 1221 mtx_lock(&softc->lock); 1222 cs->cs_id = softc->last_session_id + 1; 1223 softc->last_session_id++; 1224 mtx_unlock(&softc->lock); 1225 1226 mtx_lock(&softc->lock); 1227 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1228 mtx_unlock(&softc->lock); 1229 1230 /* 1231 * Start pinging the initiator. 1232 */ 1233 callout_init(&cs->cs_callout, 1); 1234 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1235 1236 return (cs); 1237} 1238 1239static void 1240cfiscsi_session_delete(struct cfiscsi_session *cs) 1241{ 1242 struct cfiscsi_softc *softc; 1243 1244 softc = &cfiscsi_softc; 1245 1246 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1247 ("destroying session with outstanding CTL pdus")); 1248 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1249 ("destroying session with non-empty queue")); 1250 1251 cfiscsi_session_unregister_initiator(cs); 1252 if (cs->cs_target != NULL) 1253 cfiscsi_target_release(cs->cs_target); 1254 icl_conn_close(cs->cs_conn); 1255 icl_conn_free(cs->cs_conn); 1256 1257 mtx_lock(&softc->lock); 1258 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1259 mtx_unlock(&softc->lock); 1260 1261 free(cs, M_CFISCSI); 1262} 1263 1264int 1265cfiscsi_init(void) 1266{ 1267 struct cfiscsi_softc *softc; 1268 struct ctl_frontend *fe; 1269 int retval; 1270 1271 softc = &cfiscsi_softc; 1272 retval = 0; 1273 bzero(softc, sizeof(*softc)); 1274 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1275 1276#ifdef ICL_KERNEL_PROXY 1277 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1278#endif 1279 TAILQ_INIT(&softc->sessions); 1280 TAILQ_INIT(&softc->targets); 1281 1282 fe = &softc->fe; 1283 fe->port_type = CTL_PORT_ISCSI; 1284 /* XXX KDM what should the real number be here? */ 1285 fe->num_requested_ctl_io = 4096; 1286 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1287 fe->port_name = softc->port_name; 1288 fe->port_online = cfiscsi_online; 1289 fe->port_offline = cfiscsi_offline; 1290 fe->onoff_arg = softc; 1291 fe->targ_enable = cfiscsi_targ_enable; 1292 fe->targ_disable = cfiscsi_targ_disable; 1293 fe->lun_enable = cfiscsi_lun_enable; 1294 fe->lun_disable = cfiscsi_lun_disable; 1295 fe->targ_lun_arg = softc; 1296 fe->ioctl = cfiscsi_ioctl; 1297 fe->devid = cfiscsi_devid; 1298 fe->fe_datamove = cfiscsi_datamove; 1299 fe->fe_done = cfiscsi_done; 1300 1301 /* XXX KDM what should we report here? */ 1302 /* XXX These should probably be fetched from CTL. */ 1303 fe->max_targets = 1; 1304 fe->max_target_id = 15; 1305 1306 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1307 if (retval != 0) { 1308 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1309 retval); 1310 retval = 1; 1311 goto bailout; 1312 } 1313 1314 softc->max_initiators = fe->max_initiators; 1315 1316 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1317 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1318 UMA_ALIGN_PTR, 0); 1319 1320 return (0); 1321 1322bailout: 1323 return (retval); 1324} 1325 1326static int 1327cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1328{ 1329 1330 switch (what) { 1331 case MOD_LOAD: 1332 return (cfiscsi_init()); 1333 case MOD_UNLOAD: 1334 return (EBUSY); 1335 default: 1336 return (EOPNOTSUPP); 1337 } 1338} 1339 1340#ifdef ICL_KERNEL_PROXY 1341static void 1342cfiscsi_accept(struct socket *so) 1343{ 1344 struct cfiscsi_session *cs; 1345 1346 cs = cfiscsi_session_new(&cfiscsi_softc); 1347 if (cs == NULL) { 1348 CFISCSI_WARN("failed to create session"); 1349 return; 1350 } 1351 1352 icl_conn_handoff_sock(cs->cs_conn, so); 1353 cs->cs_waiting_for_ctld = true; 1354 cv_signal(&cfiscsi_softc.accept_cv); 1355} 1356#endif 1357 1358static void 1359cfiscsi_online(void *arg) 1360{ 1361 struct cfiscsi_softc *softc; 1362 1363 softc = (struct cfiscsi_softc *)arg; 1364 1365 softc->online = 1; 1366#ifdef ICL_KERNEL_PROXY 1367 if (softc->listener != NULL) 1368 icl_listen_free(softc->listener); 1369 softc->listener = icl_listen_new(cfiscsi_accept); 1370#endif 1371} 1372 1373static void 1374cfiscsi_offline(void *arg) 1375{ 1376 struct cfiscsi_softc *softc; 1377 struct cfiscsi_session *cs; 1378 1379 softc = (struct cfiscsi_softc *)arg; 1380 1381 softc->online = 0; 1382 1383 mtx_lock(&softc->lock); 1384 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1385 cfiscsi_session_terminate(cs); 1386 mtx_unlock(&softc->lock); 1387 1388#ifdef ICL_KERNEL_PROXY 1389 icl_listen_free(softc->listener); 1390 softc->listener = NULL; 1391#endif 1392} 1393 1394static int 1395cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1396{ 1397 1398 return (0); 1399} 1400 1401static int 1402cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1403{ 1404 1405 return (0); 1406} 1407 1408static void 1409cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1410{ 1411 struct cfiscsi_softc *softc; 1412 struct cfiscsi_session *cs; 1413 struct cfiscsi_target *ct; 1414 struct ctl_iscsi_handoff_params *cihp; 1415#ifndef ICL_KERNEL_PROXY 1416 int error; 1417#endif 1418 1419 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1420 softc = &cfiscsi_softc; 1421 1422 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1423 cihp->initiator_name, cihp->initiator_addr, 1424 cihp->target_name); 1425 1426 if (softc->online == 0) { 1427 ci->status = CTL_ISCSI_ERROR; 1428 snprintf(ci->error_str, sizeof(ci->error_str), 1429 "%s: port offline", __func__); 1430 return; 1431 } 1432 1433 ct = cfiscsi_target_find(softc, cihp->target_name); 1434 if (ct == NULL) { 1435 ci->status = CTL_ISCSI_ERROR; 1436 snprintf(ci->error_str, sizeof(ci->error_str), 1437 "%s: target not found", __func__); 1438 return; 1439 } 1440 1441#ifdef ICL_KERNEL_PROXY 1442 mtx_lock(&cfiscsi_softc.lock); 1443 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1444 if (cs->cs_id == cihp->socket) 1445 break; 1446 } 1447 if (cs == NULL) { 1448 mtx_unlock(&cfiscsi_softc.lock); 1449 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1450 ci->status = CTL_ISCSI_ERROR; 1451 cfiscsi_target_release(ct); 1452 return; 1453 } 1454 mtx_unlock(&cfiscsi_softc.lock); 1455#else 1456 cs = cfiscsi_session_new(softc); 1457 if (cs == NULL) { 1458 ci->status = CTL_ISCSI_ERROR; 1459 snprintf(ci->error_str, sizeof(ci->error_str), 1460 "%s: cfiscsi_session_new failed", __func__); 1461 cfiscsi_target_release(ct); 1462 return; 1463 } 1464#endif 1465 cs->cs_target = ct; 1466 1467 /* 1468 * First PDU of Full Feature phase has the same CmdSN as the last 1469 * PDU from the Login Phase received from the initiator. Thus, 1470 * the -1 below. 1471 */ 1472 cs->cs_portal_group_tag = cihp->portal_group_tag; 1473 cs->cs_cmdsn = cihp->cmdsn; 1474 cs->cs_statsn = cihp->statsn; 1475 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1476 cs->cs_max_burst_length = cihp->max_burst_length; 1477 cs->cs_immediate_data = !!cihp->immediate_data; 1478 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1479 cs->cs_conn->ic_header_crc32c = true; 1480 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1481 cs->cs_conn->ic_data_crc32c = true; 1482 1483 strlcpy(cs->cs_initiator_name, 1484 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1485 strlcpy(cs->cs_initiator_addr, 1486 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1487 strlcpy(cs->cs_initiator_alias, 1488 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1489 1490#ifdef ICL_KERNEL_PROXY 1491 cs->cs_login_phase = false; 1492#else 1493 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1494 if (error != 0) { 1495 cfiscsi_session_delete(cs); 1496 ci->status = CTL_ISCSI_ERROR; 1497 snprintf(ci->error_str, sizeof(ci->error_str), 1498 "%s: icl_conn_handoff failed with error %d", 1499 __func__, error); 1500 return; 1501 } 1502#endif 1503 1504 /* 1505 * Register initiator with CTL. 1506 */ 1507 cfiscsi_session_register_initiator(cs); 1508 1509#ifdef ICL_KERNEL_PROXY 1510 /* 1511 * First PDU of the Full Feature phase has likely already arrived. 1512 * We have to pick it up and execute properly. 1513 */ 1514 if (cs->cs_login_pdu != NULL) { 1515 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1516 cfiscsi_pdu_handle(cs->cs_login_pdu); 1517 cs->cs_login_pdu = NULL; 1518 } 1519#endif 1520 1521 ci->status = CTL_ISCSI_OK; 1522} 1523 1524static void 1525cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1526{ 1527 struct ctl_iscsi_list_params *cilp; 1528 struct cfiscsi_session *cs; 1529 struct cfiscsi_softc *softc; 1530 struct sbuf *sb; 1531 int error; 1532 1533 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1534 softc = &cfiscsi_softc; 1535 1536 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1537 if (sb == NULL) { 1538 ci->status = CTL_ISCSI_ERROR; 1539 snprintf(ci->error_str, sizeof(ci->error_str), 1540 "Unable to allocate %d bytes for iSCSI session list", 1541 cilp->alloc_len); 1542 return; 1543 } 1544 1545 sbuf_printf(sb, "<ctlislist>\n"); 1546 mtx_lock(&softc->lock); 1547 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1548#ifdef ICL_KERNEL_PROXY 1549 if (cs->cs_target == NULL) 1550 continue; 1551#endif 1552 error = sbuf_printf(sb, "<connection id=\"%d\">" 1553 "<initiator>%s</initiator>" 1554 "<initiator_addr>%s</initiator_addr>" 1555 "<initiator_alias>%s</initiator_alias>" 1556 "<target>%s</target>" 1557 "<target_alias>%s</target_alias>" 1558 "<header_digest>%s</header_digest>" 1559 "<data_digest>%s</data_digest>" 1560 "<max_data_segment_length>%zd</max_data_segment_length>" 1561 "<immediate_data>%d</immediate_data>" 1562 "<iser>%d</iser>" 1563 "</connection>\n", 1564 cs->cs_id, 1565 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1566 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1567 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1568 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1569 cs->cs_max_data_segment_length, 1570 cs->cs_immediate_data, 1571 cs->cs_conn->ic_iser); 1572 if (error != 0) 1573 break; 1574 } 1575 mtx_unlock(&softc->lock); 1576 error = sbuf_printf(sb, "</ctlislist>\n"); 1577 if (error != 0) { 1578 sbuf_delete(sb); 1579 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1580 snprintf(ci->error_str, sizeof(ci->error_str), 1581 "Out of space, %d bytes is too small", cilp->alloc_len); 1582 return; 1583 } 1584 sbuf_finish(sb); 1585 1586 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1587 cilp->fill_len = sbuf_len(sb) + 1; 1588 ci->status = CTL_ISCSI_OK; 1589 sbuf_delete(sb); 1590} 1591 1592static void 1593cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1594{ 1595 struct icl_pdu *response; 1596 struct iscsi_bhs_asynchronous_message *bhsam; 1597 struct ctl_iscsi_terminate_params *citp; 1598 struct cfiscsi_session *cs; 1599 struct cfiscsi_softc *softc; 1600 int found = 0; 1601 1602 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1603 softc = &cfiscsi_softc; 1604 1605 mtx_lock(&softc->lock); 1606 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1607 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1608 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1609 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1610 continue; 1611 1612 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1613 if (response == NULL) { 1614 /* 1615 * Oh well. Just terminate the connection. 1616 */ 1617 } else { 1618 bhsam = (struct iscsi_bhs_asynchronous_message *) 1619 response->ip_bhs; 1620 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1621 bhsam->bhsam_flags = 0x80; 1622 bhsam->bhsam_0xffffffff = 0xffffffff; 1623 bhsam->bhsam_async_event = 1624 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1625 cfiscsi_pdu_queue(response); 1626 } 1627 cfiscsi_session_terminate(cs); 1628 found++; 1629 } 1630 mtx_unlock(&softc->lock); 1631 1632 if (found == 0) { 1633 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1634 snprintf(ci->error_str, sizeof(ci->error_str), 1635 "No matching connections found"); 1636 return; 1637 } 1638 1639 ci->status = CTL_ISCSI_OK; 1640} 1641 1642static void 1643cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1644{ 1645 struct icl_pdu *response; 1646 struct iscsi_bhs_asynchronous_message *bhsam; 1647 struct ctl_iscsi_logout_params *cilp; 1648 struct cfiscsi_session *cs; 1649 struct cfiscsi_softc *softc; 1650 int found = 0; 1651 1652 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1653 softc = &cfiscsi_softc; 1654 1655 mtx_lock(&softc->lock); 1656 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1657 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1658 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1659 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1660 continue; 1661 1662 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1663 if (response == NULL) { 1664 ci->status = CTL_ISCSI_ERROR; 1665 snprintf(ci->error_str, sizeof(ci->error_str), 1666 "Unable to allocate memory"); 1667 mtx_unlock(&softc->lock); 1668 return; 1669 } 1670 bhsam = 1671 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1672 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1673 bhsam->bhsam_flags = 0x80; 1674 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1675 bhsam->bhsam_parameter3 = htons(10); 1676 cfiscsi_pdu_queue(response); 1677 found++; 1678 } 1679 mtx_unlock(&softc->lock); 1680 1681 if (found == 0) { 1682 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1683 snprintf(ci->error_str, sizeof(ci->error_str), 1684 "No matching connections found"); 1685 return; 1686 } 1687 1688 ci->status = CTL_ISCSI_OK; 1689} 1690 1691#ifdef ICL_KERNEL_PROXY 1692static void 1693cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1694{ 1695 struct ctl_iscsi_listen_params *cilp; 1696 struct sockaddr *sa; 1697 int error; 1698 1699 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1700 1701 if (cfiscsi_softc.listener == NULL) { 1702 CFISCSI_DEBUG("no listener"); 1703 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1704 ci->status = CTL_ISCSI_ERROR; 1705 return; 1706 } 1707 1708 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1709 if (error != 0) { 1710 CFISCSI_DEBUG("getsockaddr, error %d", error); 1711 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1712 ci->status = CTL_ISCSI_ERROR; 1713 return; 1714 } 1715 1716 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1717 cilp->socktype, cilp->protocol, sa); 1718 if (error != 0) { 1719 free(sa, M_SONAME); 1720 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1721 snprintf(ci->error_str, sizeof(ci->error_str), 1722 "icl_listen_add failed, error %d", error); 1723 ci->status = CTL_ISCSI_ERROR; 1724 return; 1725 } 1726 1727 ci->status = CTL_ISCSI_OK; 1728} 1729 1730static void 1731cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1732{ 1733 struct ctl_iscsi_accept_params *ciap; 1734 struct cfiscsi_session *cs; 1735 int error; 1736 1737 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1738 1739 mtx_lock(&cfiscsi_softc.lock); 1740 for (;;) { 1741 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1742 if (cs->cs_waiting_for_ctld) 1743 break; 1744 } 1745 if (cs != NULL) 1746 break; 1747 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1748 if (error != 0) { 1749 mtx_unlock(&cfiscsi_softc.lock); 1750 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1751 ci->status = CTL_ISCSI_ERROR; 1752 return; 1753 } 1754 } 1755 mtx_unlock(&cfiscsi_softc.lock); 1756 1757 cs->cs_waiting_for_ctld = false; 1758 cs->cs_login_phase = true; 1759 1760 ciap->connection_id = cs->cs_id; 1761 ci->status = CTL_ISCSI_OK; 1762} 1763 1764static void 1765cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1766{ 1767 struct ctl_iscsi_send_params *cisp; 1768 struct cfiscsi_session *cs; 1769 struct icl_pdu *ip; 1770 size_t datalen; 1771 void *data; 1772 int error; 1773 1774 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1775 1776 mtx_lock(&cfiscsi_softc.lock); 1777 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1778 if (cs->cs_id == cisp->connection_id) 1779 break; 1780 } 1781 if (cs == NULL) { 1782 mtx_unlock(&cfiscsi_softc.lock); 1783 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1784 ci->status = CTL_ISCSI_ERROR; 1785 return; 1786 } 1787 mtx_unlock(&cfiscsi_softc.lock); 1788 1789#if 0 1790 if (cs->cs_login_phase == false) 1791 return (EBUSY); 1792#endif 1793 1794 if (cs->cs_terminating) { 1795 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1796 ci->status = CTL_ISCSI_ERROR; 1797 return; 1798 } 1799 1800 datalen = cisp->data_segment_len; 1801 /* 1802 * XXX 1803 */ 1804 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1805 if (datalen > 65535) { 1806 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1807 ci->status = CTL_ISCSI_ERROR; 1808 return; 1809 } 1810 if (datalen > 0) { 1811 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1812 error = copyin(cisp->data_segment, data, datalen); 1813 if (error != 0) { 1814 free(data, M_CFISCSI); 1815 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1816 ci->status = CTL_ISCSI_ERROR; 1817 return; 1818 } 1819 } 1820 1821 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1822 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1823 if (datalen > 0) { 1824 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1825 free(data, M_CFISCSI); 1826 } 1827 icl_pdu_queue(ip); 1828 ci->status = CTL_ISCSI_OK; 1829} 1830 1831static void 1832cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1833{ 1834 struct ctl_iscsi_receive_params *cirp; 1835 struct cfiscsi_session *cs; 1836 struct icl_pdu *ip; 1837 void *data; 1838 1839 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1840 1841 mtx_lock(&cfiscsi_softc.lock); 1842 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1843 if (cs->cs_id == cirp->connection_id) 1844 break; 1845 } 1846 if (cs == NULL) { 1847 mtx_unlock(&cfiscsi_softc.lock); 1848 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1849 ci->status = CTL_ISCSI_ERROR; 1850 return; 1851 } 1852 mtx_unlock(&cfiscsi_softc.lock); 1853 1854#if 0 1855 if (is->is_login_phase == false) 1856 return (EBUSY); 1857#endif 1858 1859 CFISCSI_SESSION_LOCK(cs); 1860 while (cs->cs_login_pdu == NULL && 1861 cs->cs_terminating == false) 1862 cv_wait(&cs->cs_login_cv, &cs->cs_lock); 1863 if (cs->cs_terminating) { 1864 CFISCSI_SESSION_UNLOCK(cs); 1865 snprintf(ci->error_str, sizeof(ci->error_str), "connection terminating"); 1866 ci->status = CTL_ISCSI_ERROR; 1867 return; 1868 } 1869 ip = cs->cs_login_pdu; 1870 cs->cs_login_pdu = NULL; 1871 CFISCSI_SESSION_UNLOCK(cs); 1872 1873 if (ip->ip_data_len > cirp->data_segment_len) { 1874 icl_pdu_free(ip); 1875 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1876 ci->status = CTL_ISCSI_ERROR; 1877 return; 1878 } 1879 1880 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1881 if (ip->ip_data_len > 0) { 1882 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1883 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1884 copyout(data, cirp->data_segment, ip->ip_data_len); 1885 free(data, M_CFISCSI); 1886 } 1887 1888 icl_pdu_free(ip); 1889 ci->status = CTL_ISCSI_OK; 1890} 1891 1892static void 1893cfiscsi_ioctl_close(struct ctl_iscsi *ci) 1894{ 1895 /* 1896 * XXX 1897 */ 1898} 1899#endif /* !ICL_KERNEL_PROXY */ 1900 1901static int 1902cfiscsi_ioctl(struct cdev *dev, 1903 u_long cmd, caddr_t addr, int flag, struct thread *td) 1904{ 1905 struct ctl_iscsi *ci; 1906 1907 if (cmd != CTL_ISCSI) 1908 return (ENOTTY); 1909 1910 ci = (struct ctl_iscsi *)addr; 1911 switch (ci->type) { 1912 case CTL_ISCSI_HANDOFF: 1913 cfiscsi_ioctl_handoff(ci); 1914 break; 1915 case CTL_ISCSI_LIST: 1916 cfiscsi_ioctl_list(ci); 1917 break; 1918 case CTL_ISCSI_TERMINATE: 1919 cfiscsi_ioctl_terminate(ci); 1920 break; 1921 case CTL_ISCSI_LOGOUT: 1922 cfiscsi_ioctl_logout(ci); 1923 break; 1924#ifdef ICL_KERNEL_PROXY 1925 case CTL_ISCSI_LISTEN: 1926 cfiscsi_ioctl_listen(ci); 1927 break; 1928 case CTL_ISCSI_ACCEPT: 1929 cfiscsi_ioctl_accept(ci); 1930 break; 1931 case CTL_ISCSI_SEND: 1932 cfiscsi_ioctl_send(ci); 1933 break; 1934 case CTL_ISCSI_RECEIVE: 1935 cfiscsi_ioctl_receive(ci); 1936 break; 1937 case CTL_ISCSI_CLOSE: 1938 cfiscsi_ioctl_close(ci); 1939 break; 1940#endif /* ICL_KERNEL_PROXY */ 1941 default: 1942 ci->status = CTL_ISCSI_ERROR; 1943 snprintf(ci->error_str, sizeof(ci->error_str), 1944 "%s: invalid iSCSI request type %d", __func__, ci->type); 1945 break; 1946 } 1947 1948 return (0); 1949} 1950 1951static int 1952cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 1953{ 1954 struct cfiscsi_session *cs; 1955 struct scsi_vpd_device_id *devid_ptr; 1956 struct scsi_vpd_id_descriptor *desc, *desc1; 1957 struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */ 1958 struct scsi_vpd_id_t10 *t10id; 1959 struct ctl_lun *lun; 1960 const struct icl_pdu *request; 1961 size_t devid_len, wwpn_len; 1962 1963 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 1964 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 1965 cs = PDU_SESSION(request); 1966 1967 wwpn_len = strlen(cs->cs_target->ct_name); 1968 wwpn_len += strlen(",t,0x01"); 1969 wwpn_len += 1; /* '\0' */ 1970 if ((wwpn_len % 4) != 0) 1971 wwpn_len += (4 - (wwpn_len % 4)); 1972 1973 devid_len = sizeof(struct scsi_vpd_device_id) + 1974 sizeof(struct scsi_vpd_id_descriptor) + 1975 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 1976 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 1977 sizeof(struct scsi_vpd_id_descriptor) + 1978 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 1979 sizeof(struct scsi_vpd_id_descriptor) + 1980 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 1981 1982 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 1983 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 1984 ctsio->kern_sg_entries = 0; 1985 1986 if (devid_len < alloc_len) { 1987 ctsio->residual = alloc_len - devid_len; 1988 ctsio->kern_data_len = devid_len; 1989 ctsio->kern_total_len = devid_len; 1990 } else { 1991 ctsio->residual = 0; 1992 ctsio->kern_data_len = alloc_len; 1993 ctsio->kern_total_len = alloc_len; 1994 } 1995 ctsio->kern_data_resid = 0; 1996 ctsio->kern_rel_offset = 0; 1997 ctsio->kern_sg_entries = 0; 1998 1999 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2000 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2001 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2002 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 2003 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2004 wwpn_len); 2005 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2006 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2007 2008 if (lun != NULL) 2009 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2010 lun->be_lun->lun_type; 2011 else 2012 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2013 2014 devid_ptr->page_code = SVPD_DEVICE_ID; 2015 2016 scsi_ulto2b(devid_len - 4, devid_ptr->length); 2017 2018 /* 2019 * We're using a LUN association here. i.e., this device ID is a 2020 * per-LUN identifier. 2021 */ 2022 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2023 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2024 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 2025 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2026 2027 /* 2028 * If we've actually got a backend, copy the device id from the 2029 * per-LUN data. Otherwise, set it to all spaces. 2030 */ 2031 if (lun != NULL) { 2032 /* 2033 * Copy the backend's LUN ID. 2034 */ 2035 strncpy((char *)t10id->vendor_spec_id, 2036 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2037 } else { 2038 /* 2039 * No backend, set this to spaces. 2040 */ 2041 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2042 } 2043 2044 /* 2045 * desc1 is for the WWPN which is a port asscociation. 2046 */ 2047 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2048 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2049 SVPD_ID_TYPE_SCSI_NAME; 2050 desc1->length = wwpn_len; 2051 snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x", 2052 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2053 2054 /* 2055 * desc2 is for the Relative Target Port(type 4h) identifier 2056 */ 2057 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2058 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2059 SVPD_ID_TYPE_RELTARG; 2060 desc2->length = 4; 2061 desc2->identifier[3] = 1; 2062 2063 /* 2064 * desc3 is for the Target Port Group(type 5h) identifier 2065 */ 2066 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2067 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2068 SVPD_ID_TYPE_TPORTGRP; 2069 desc3->length = 4; 2070 desc3->identifier[3] = 1; 2071 2072 ctsio->scsi_status = SCSI_STATUS_OK; 2073 2074 ctsio->be_move_done = ctl_config_move_done; 2075 ctl_datamove((union ctl_io *)ctsio); 2076 2077 return (CTL_RETVAL_COMPLETE); 2078} 2079 2080static void 2081cfiscsi_target_hold(struct cfiscsi_target *ct) 2082{ 2083 2084 refcount_acquire(&ct->ct_refcount); 2085} 2086 2087static void 2088cfiscsi_target_release(struct cfiscsi_target *ct) 2089{ 2090 struct cfiscsi_softc *softc; 2091 2092 softc = ct->ct_softc; 2093 mtx_lock(&softc->lock); 2094 if (refcount_release(&ct->ct_refcount)) { 2095 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2096 mtx_unlock(&softc->lock); 2097 free(ct, M_CFISCSI); 2098 2099 return; 2100 } 2101 mtx_unlock(&softc->lock); 2102} 2103 2104static struct cfiscsi_target * 2105cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2106{ 2107 struct cfiscsi_target *ct; 2108 2109 mtx_lock(&softc->lock); 2110 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2111 if (strcmp(name, ct->ct_name) != 0) 2112 continue; 2113 cfiscsi_target_hold(ct); 2114 mtx_unlock(&softc->lock); 2115 return (ct); 2116 } 2117 mtx_unlock(&softc->lock); 2118 2119 return (NULL); 2120} 2121 2122static struct cfiscsi_target * 2123cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2124 const char *alias) 2125{ 2126 struct cfiscsi_target *ct, *newct; 2127 int i; 2128 2129 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2130 return (NULL); 2131 2132 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2133 2134 mtx_lock(&softc->lock); 2135 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2136 if (strcmp(name, ct->ct_name) != 0) 2137 continue; 2138 cfiscsi_target_hold(ct); 2139 mtx_unlock(&softc->lock); 2140 free(newct, M_CFISCSI); 2141 return (ct); 2142 } 2143 2144 for (i = 0; i < CTL_MAX_LUNS; i++) 2145 newct->ct_luns[i] = -1; 2146 2147 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2148 if (alias != NULL) 2149 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2150 refcount_init(&newct->ct_refcount, 1); 2151 newct->ct_softc = softc; 2152 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2153 mtx_unlock(&softc->lock); 2154 2155 return (newct); 2156} 2157 2158/* 2159 * Takes LUN from the target space and returns LUN from the CTL space. 2160 */ 2161static uint32_t 2162cfiscsi_map_lun(void *arg, uint32_t lun) 2163{ 2164 struct cfiscsi_session *cs; 2165 2166 cs = arg; 2167 2168 if (lun >= CTL_MAX_LUNS) { 2169 CFISCSI_DEBUG("requested lun number %d is higher " 2170 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2171 return (0xffffffff); 2172 } 2173 2174 if (cs->cs_target->ct_luns[lun] < 0) 2175 return (0xffffffff); 2176 2177 return (cs->cs_target->ct_luns[lun]); 2178} 2179 2180static int 2181cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2182 unsigned long lun_id, unsigned long ctl_lun_id) 2183{ 2184 2185 if (lun_id >= CTL_MAX_LUNS) { 2186 CFISCSI_WARN("requested lun number %ld is higher " 2187 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2188 return (-1); 2189 } 2190 2191 if (ct->ct_luns[lun_id] >= 0) { 2192 /* 2193 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2194 * when the LUN is created, and a second time just before 2195 * the port is brought online; don't emit warnings 2196 * for that case. 2197 */ 2198 if (ct->ct_luns[lun_id] == ctl_lun_id) 2199 return (0); 2200 CFISCSI_WARN("lun %ld already allocated", lun_id); 2201 return (-1); 2202 } 2203 2204#if 0 2205 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2206 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2207#endif 2208 2209 ct->ct_luns[lun_id] = ctl_lun_id; 2210 cfiscsi_target_hold(ct); 2211 2212 return (0); 2213} 2214 2215static int 2216cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2217{ 2218 2219 if (ct->ct_luns[lun_id] < 0) { 2220 CFISCSI_WARN("lun %ld not allocated", lun_id); 2221 return (-1); 2222 } 2223 2224 ct->ct_luns[lun_id] = -1; 2225 cfiscsi_target_release(ct); 2226 2227 return (0); 2228} 2229 2230static int 2231cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2232{ 2233 struct cfiscsi_softc *softc; 2234 struct cfiscsi_target *ct; 2235 struct ctl_be_lun_option *opt; 2236 const char *target = NULL, *target_alias = NULL; 2237 const char *lun = NULL; 2238 unsigned long tmp; 2239 2240 softc = (struct cfiscsi_softc *)arg; 2241 2242 STAILQ_FOREACH(opt, 2243 &control_softc->ctl_luns[lun_id]->be_lun->options, links) { 2244 if (strcmp(opt->name, "cfiscsi_target") == 0) 2245 target = opt->value; 2246 else if (strcmp(opt->name, "cfiscsi_target_alias") == 0) 2247 target_alias = opt->value; 2248 else if (strcmp(opt->name, "cfiscsi_lun") == 0) 2249 lun = opt->value; 2250 } 2251 2252 if (target == NULL && lun == NULL) 2253 return (0); 2254 2255 if (target == NULL || lun == NULL) { 2256 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2257 "cfiscsi_lun, or the other way around; ignoring"); 2258 return (0); 2259 } 2260 2261 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2262 if (ct == NULL) { 2263 CFISCSI_WARN("failed to create target \"%s\"", target); 2264 return (0); 2265 } 2266 2267 tmp = strtoul(lun, NULL, 10); 2268 cfiscsi_target_set_lun(ct, tmp, lun_id); 2269 cfiscsi_target_release(ct); 2270 return (0); 2271} 2272 2273static int 2274cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2275{ 2276 struct cfiscsi_softc *softc; 2277 struct cfiscsi_target *ct; 2278 int i; 2279 2280 softc = (struct cfiscsi_softc *)arg; 2281 2282 mtx_lock(&softc->lock); 2283 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2284 for (i = 0; i < CTL_MAX_LUNS; i++) { 2285 if (ct->ct_luns[i] < 0) 2286 continue; 2287 if (ct->ct_luns[i] != lun_id) 2288 continue; 2289 mtx_unlock(&softc->lock); 2290 cfiscsi_target_unset_lun(ct, i); 2291 return (0); 2292 } 2293 } 2294 mtx_unlock(&softc->lock); 2295 return (0); 2296} 2297 2298static void 2299cfiscsi_datamove_in(union ctl_io *io) 2300{ 2301 struct cfiscsi_session *cs; 2302 struct icl_pdu *request, *response; 2303 const struct iscsi_bhs_scsi_command *bhssc; 2304 struct iscsi_bhs_data_in *bhsdi; 2305 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2306 size_t len, expected_len, sg_len, buffer_offset; 2307 const char *sg_addr; 2308 int ctl_sg_count, error, i; 2309 2310 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2311 cs = PDU_SESSION(request); 2312 2313 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2314 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2315 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2316 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2317 2318 if (io->scsiio.kern_sg_entries > 0) { 2319 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2320 ctl_sg_count = io->scsiio.kern_sg_entries; 2321 } else { 2322 ctl_sglist = &ctl_sg_entry; 2323 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2324 ctl_sglist->len = io->scsiio.kern_data_len; 2325 ctl_sg_count = 1; 2326 } 2327 2328 /* 2329 * This is the total amount of data to be transferred within the current 2330 * SCSI command. We need to record it so that we can properly report 2331 * underflow/underflow. 2332 */ 2333 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2334 2335 /* 2336 * This is the offset within the current SCSI command; for the first 2337 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2338 * it will be the sum of lengths of previous ones. It's being 2339 * incremented as we append data to the data segment. 2340 */ 2341 buffer_offset = io->scsiio.kern_rel_offset; 2342 2343 /* 2344 * This is the transfer length expected by the initiator. In theory, 2345 * it could be different from the correct amount of data from the SCSI 2346 * point of view, even if that doesn't make any sense. 2347 */ 2348 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2349#if 0 2350 if (expected_len != io->scsiio.kern_total_len) 2351 CFISCSI_SESSION_DEBUG(cs, "expected transfer length = %zd, " 2352 "actual length = %zd", expected_len, 2353 io->scsiio.kern_total_len); 2354#endif 2355 2356 if (buffer_offset >= expected_len) { 2357#if 0 2358 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2359 "already sent the expected len", buffer_offset); 2360#endif 2361 io->scsiio.ext_data_filled = io->scsiio.kern_total_len; 2362 io->scsiio.be_move_done(io); 2363 return; 2364 } 2365 2366 i = 0; 2367 sg_addr = NULL; 2368 sg_len = 0; 2369 response = NULL; 2370 bhsdi = NULL; 2371 for (;;) { 2372 if (response == NULL) { 2373 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2374 if (response == NULL) { 2375 CFISCSI_SESSION_WARN(cs, "failed to " 2376 "allocate memory; dropping connection"); 2377 ctl_set_busy(&io->scsiio); 2378 io->scsiio.be_move_done(io); 2379 cfiscsi_session_terminate(cs); 2380 return; 2381 } 2382 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2383 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2384 bhsdi->bhsdi_initiator_task_tag = 2385 bhssc->bhssc_initiator_task_tag; 2386 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2387 PDU_EXPDATASN(request)++; 2388 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2389 } 2390 2391 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2392 if (sg_len == 0) { 2393 sg_addr = ctl_sglist[i].addr; 2394 sg_len = ctl_sglist[i].len; 2395 KASSERT(sg_len > 0, ("sg_len <= 0")); 2396 } 2397 2398 len = sg_len; 2399 2400 /* 2401 * Truncate to maximum data segment length. 2402 */ 2403 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2404 ("max_data_segment_length %zd >= ip_data_len %zd", 2405 response->ip_data_len, cs->cs_max_data_segment_length)); 2406 if (response->ip_data_len + len > 2407 cs->cs_max_data_segment_length) 2408 len = cs->cs_max_data_segment_length - 2409 response->ip_data_len; 2410 2411 /* 2412 * Truncate to expected data transfer length. 2413 */ 2414 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2415 ("%zd >= %zd", buffer_offset + response->ip_data_len, expected_len)); 2416 if (buffer_offset + response->ip_data_len + len > expected_len) { 2417 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2418 "to expected data transfer length %zd", 2419 buffer_offset + response->ip_data_len + len, expected_len); 2420 len = expected_len - (buffer_offset + response->ip_data_len); 2421 } 2422 2423 KASSERT(len <= sg_len, ("len > sg_len")); 2424 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2425 if (error != 0) { 2426 CFISCSI_SESSION_WARN(cs, "failed to " 2427 "allocate memory; dropping connection"); 2428 icl_pdu_free(response); 2429 ctl_set_busy(&io->scsiio); 2430 io->scsiio.be_move_done(io); 2431 cfiscsi_session_terminate(cs); 2432 return; 2433 } 2434 sg_addr += len; 2435 sg_len -= len; 2436 buffer_offset += len; 2437 io->scsiio.ext_data_filled += len; 2438 2439 if (buffer_offset == expected_len) { 2440 /* 2441 * Already have the amount of data the initiator wanted. 2442 */ 2443 break; 2444 } 2445 2446 if (sg_len == 0) { 2447 /* 2448 * End of scatter-gather segment; 2449 * proceed to the next one... 2450 */ 2451 if (i == ctl_sg_count - 1) { 2452 /* 2453 * ... unless this was the last one. 2454 */ 2455 break; 2456 } 2457 i++; 2458 } 2459 2460 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2461 /* 2462 * Can't stuff more data into the current PDU; 2463 * queue it. Note that's not enough to check 2464 * for kern_data_resid == 0 instead; there 2465 * may be several Data-In PDUs for the final 2466 * call to cfiscsi_datamove(), and we want 2467 * to set the F flag only on the last of them. 2468 */ 2469 if (buffer_offset == io->scsiio.kern_total_len || 2470 buffer_offset == expected_len) 2471 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2472 cfiscsi_pdu_queue(response); 2473 response = NULL; 2474 bhsdi = NULL; 2475 } 2476 } 2477 if (response != NULL) { 2478 if (buffer_offset == io->scsiio.kern_total_len || 2479 buffer_offset == expected_len) 2480 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2481 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2482 cfiscsi_pdu_queue(response); 2483 } 2484 2485 io->scsiio.be_move_done(io); 2486} 2487 2488static void 2489cfiscsi_datamove_out(union ctl_io *io) 2490{ 2491 struct cfiscsi_session *cs; 2492 struct icl_pdu *request, *response; 2493 const struct iscsi_bhs_scsi_command *bhssc; 2494 struct iscsi_bhs_r2t *bhsr2t; 2495 struct cfiscsi_data_wait *cdw; 2496 uint32_t target_transfer_tag; 2497 bool done; 2498 2499 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2500 cs = PDU_SESSION(request); 2501 2502 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2503 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2504 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2505 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2506 2507 /* 2508 * We need to record it so that we can properly report 2509 * underflow/underflow. 2510 */ 2511 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2512 2513 CFISCSI_SESSION_LOCK(cs); 2514 target_transfer_tag = cs->cs_target_transfer_tag; 2515 cs->cs_target_transfer_tag++; 2516 CFISCSI_SESSION_UNLOCK(cs); 2517 2518#if 0 2519 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2520 "task tag 0x%x, target transfer tag 0x%x", 2521 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2522#endif 2523 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2524 if (cdw == NULL) { 2525 CFISCSI_SESSION_WARN(cs, "failed to " 2526 "allocate memory; dropping connection"); 2527 ctl_set_busy(&io->scsiio); 2528 io->scsiio.be_move_done(io); 2529 cfiscsi_session_terminate(cs); 2530 return; 2531 } 2532 cdw->cdw_ctl_io = io; 2533 cdw->cdw_target_transfer_tag = target_transfer_tag; 2534 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2535 2536 if (cs->cs_immediate_data && icl_pdu_data_segment_length(request) > 0) { 2537 done = cfiscsi_handle_data_segment(request, cdw); 2538 if (done) { 2539 uma_zfree(cfiscsi_data_wait_zone, cdw); 2540 io->scsiio.be_move_done(io); 2541 return; 2542 } 2543 2544#if 0 2545 if (io->scsiio.ext_data_filled != 0) 2546 CFISCSI_SESSION_DEBUG(cs, "got %zd bytes of immediate data, need %zd", 2547 io->scsiio.ext_data_filled, io->scsiio.kern_data_len); 2548#endif 2549 } 2550 2551 CFISCSI_SESSION_LOCK(cs); 2552 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2553 CFISCSI_SESSION_UNLOCK(cs); 2554 2555 /* 2556 * XXX: We should limit the number of outstanding R2T PDUs 2557 * per task to MaxOutstandingR2T. 2558 */ 2559 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2560 if (response == NULL) { 2561 CFISCSI_SESSION_WARN(cs, "failed to " 2562 "allocate memory; dropping connection"); 2563 ctl_set_busy(&io->scsiio); 2564 io->scsiio.be_move_done(io); 2565 cfiscsi_session_terminate(cs); 2566 return; 2567 } 2568 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2569 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2570 bhsr2t->bhsr2t_flags = 0x80; 2571 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2572 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2573 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2574 /* 2575 * XXX: Here we assume that cfiscsi_datamove() won't ever 2576 * be running concurrently on several CPUs for a given 2577 * command. 2578 */ 2579 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2580 PDU_R2TSN(request)++; 2581 /* 2582 * This is the offset within the current SCSI command; 2583 * i.e. for the first call of datamove(), it will be 0, 2584 * and for subsequent ones it will be the sum of lengths 2585 * of previous ones. 2586 * 2587 * The ext_data_filled is to account for unsolicited 2588 * (immediate) data that might have already arrived. 2589 */ 2590 bhsr2t->bhsr2t_buffer_offset = 2591 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2592 /* 2593 * This is the total length (sum of S/G lengths) this call 2594 * to cfiscsi_datamove() is supposed to handle. 2595 * 2596 * XXX: Limit it to MaxBurstLength. 2597 */ 2598 bhsr2t->bhsr2t_desired_data_transfer_length = 2599 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2600 cfiscsi_pdu_queue(response); 2601} 2602 2603static void 2604cfiscsi_datamove(union ctl_io *io) 2605{ 2606 2607 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2608 cfiscsi_datamove_in(io); 2609 else 2610 cfiscsi_datamove_out(io); 2611} 2612 2613static void 2614cfiscsi_scsi_command_done(union ctl_io *io) 2615{ 2616 struct icl_pdu *request, *response; 2617 struct iscsi_bhs_scsi_command *bhssc; 2618 struct iscsi_bhs_scsi_response *bhssr; 2619#ifdef DIAGNOSTIC 2620 struct cfiscsi_data_wait *cdw; 2621#endif 2622 struct cfiscsi_session *cs; 2623 uint16_t sense_length; 2624 2625 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2626 cs = PDU_SESSION(request); 2627 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2628 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2629 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2630 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2631 2632 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2633 // bhssc->bhssc_initiator_task_tag); 2634 2635#ifdef DIAGNOSTIC 2636 CFISCSI_SESSION_LOCK(cs); 2637 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2638 KASSERT(bhssc->bhssc_initiator_task_tag != 2639 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2640 CFISCSI_SESSION_UNLOCK(cs); 2641#endif 2642 2643 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2644 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2645 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2646 bhssr->bhssr_flags = 0x80; 2647 /* 2648 * XXX: We don't deal with bidirectional under/overflows; 2649 * does anything actually support those? 2650 */ 2651 if (PDU_TOTAL_TRANSFER_LEN(request) < 2652 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2653 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2654 bhssr->bhssr_residual_count = 2655 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2656 PDU_TOTAL_TRANSFER_LEN(request)); 2657 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2658 // ntohl(bhssr->bhssr_residual_count)); 2659 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2660 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2661 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2662 bhssr->bhssr_residual_count = 2663 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2664 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2665 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2666 // ntohl(bhssr->bhssr_residual_count)); 2667 } 2668 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2669 bhssr->bhssr_status = io->scsiio.scsi_status; 2670 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2671 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2672 2673 if (io->scsiio.sense_len > 0) { 2674#if 0 2675 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2676 io->scsiio.sense_len); 2677#endif 2678 sense_length = htons(io->scsiio.sense_len); 2679 icl_pdu_append_data(response, 2680 &sense_length, sizeof(sense_length), M_WAITOK); 2681 icl_pdu_append_data(response, 2682 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2683 } 2684 2685 ctl_free_io(io); 2686 icl_pdu_free(request); 2687 cfiscsi_pdu_queue(response); 2688} 2689 2690static void 2691cfiscsi_task_management_done(union ctl_io *io) 2692{ 2693 struct icl_pdu *request, *response; 2694 struct iscsi_bhs_task_management_request *bhstmr; 2695 struct iscsi_bhs_task_management_response *bhstmr2; 2696 struct cfiscsi_data_wait *cdw, *tmpcdw; 2697 struct cfiscsi_session *cs; 2698 2699 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2700 cs = PDU_SESSION(request); 2701 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2702 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2703 ISCSI_BHS_OPCODE_TASK_REQUEST, 2704 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2705 2706#if 0 2707 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2708 bhstmr->bhstmr_initiator_task_tag, 2709 bhstmr->bhstmr_referenced_task_tag); 2710#endif 2711 2712 if ((bhstmr->bhstmr_function & ~0x80) == 2713 BHSTMR_FUNCTION_ABORT_TASK) { 2714 /* 2715 * Make sure we no longer wait for Data-Out for this command. 2716 */ 2717 CFISCSI_SESSION_LOCK(cs); 2718 TAILQ_FOREACH_SAFE(cdw, 2719 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2720 if (bhstmr->bhstmr_referenced_task_tag != 2721 cdw->cdw_initiator_task_tag) 2722 continue; 2723 2724#if 0 2725 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2726 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2727#endif 2728 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2729 cdw, cdw_next); 2730 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2731 uma_zfree(cfiscsi_data_wait_zone, cdw); 2732 } 2733 CFISCSI_SESSION_UNLOCK(cs); 2734 } 2735 2736 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2737 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2738 response->ip_bhs; 2739 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2740 bhstmr2->bhstmr_flags = 0x80; 2741 if (io->io_hdr.status == CTL_SUCCESS) { 2742 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2743 } else { 2744 /* 2745 * XXX: How to figure out what exactly went wrong? iSCSI spec 2746 * expects us to provide detailed error, e.g. "Task does 2747 * not exist" or "LUN does not exist". 2748 */ 2749 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2750 bhstmr2->bhstmr_response = 2751 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2752 } 2753 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2754 2755 ctl_free_io(io); 2756 icl_pdu_free(request); 2757 cfiscsi_pdu_queue(response); 2758} 2759 2760static void 2761cfiscsi_done(union ctl_io *io) 2762{ 2763 struct icl_pdu *request; 2764 struct cfiscsi_session *cs; 2765 2766 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2767 ("invalid CTL status %#x", io->io_hdr.status)); 2768 2769 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2770 if (request == NULL) { 2771 /* 2772 * Implicit task termination has just completed; nothing to do. 2773 */ 2774 return; 2775 } 2776 2777 cs = PDU_SESSION(request); 2778 refcount_release(&cs->cs_outstanding_ctl_pdus); 2779 2780 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2781 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2782 cfiscsi_scsi_command_done(io); 2783 break; 2784 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2785 cfiscsi_task_management_done(io); 2786 break; 2787 default: 2788 panic("cfiscsi_done called with wrong opcode 0x%x", 2789 request->ip_bhs->bhs_opcode); 2790 } 2791} 2792