ctl_frontend_iscsi.c revision 265513
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 265513 2014-05-07 07:37:55Z 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 265513 2014-05-07 07:37:55Z 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 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 != io->scsiio.ext_data_filled) { 746 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 747 "expected %zd", buffer_offset, 748 (size_t)io->scsiio.ext_data_filled); 749 cfiscsi_session_terminate(cs); 750 return (true); 751 } 752 753 /* 754 * This is the offset within the PDU data segment, as opposed 755 * to buffer_offset, which is the offset within the task (SCSI 756 * command). 757 */ 758 off = 0; 759 len = icl_pdu_data_segment_length(request); 760 761 /* 762 * Iterate over the scatter/gather segments, filling them with data 763 * from the PDU data segment. Note that this can get called multiple 764 * times for one SCSI command; the cdw structure holds state for the 765 * scatter/gather list. 766 */ 767 for (;;) { 768 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 769 ("cdw->cdw_sg_index >= ctl_sg_count")); 770 if (cdw->cdw_sg_len == 0) { 771 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 772 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 773 } 774 KASSERT(off <= len, ("len > off")); 775 copy_len = len - off; 776 if (copy_len > cdw->cdw_sg_len) 777 copy_len = cdw->cdw_sg_len; 778 779 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 780 cdw->cdw_sg_addr += copy_len; 781 cdw->cdw_sg_len -= copy_len; 782 off += copy_len; 783 io->scsiio.ext_data_filled += copy_len; 784 785 if (cdw->cdw_sg_len == 0) { 786 /* 787 * End of current segment. 788 */ 789 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 790 /* 791 * Last segment in scatter/gather list. 792 */ 793 break; 794 } 795 cdw->cdw_sg_index++; 796 } 797 798 if (off == len) { 799 /* 800 * End of PDU payload. 801 */ 802 break; 803 } 804 } 805 806 if (len > off) { 807 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 808 "expected %zd", icl_pdu_data_segment_length(request), off); 809 cfiscsi_session_terminate(cs); 810 return (true); 811 } 812 813 if (bhsdo->bhsdo_flags & BHSDO_FLAGS_F || 814 io->scsiio.ext_data_filled == io->scsiio.kern_total_len) { 815 if ((bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 816 CFISCSI_SESSION_WARN(cs, "got the final packet without " 817 "the F flag; flags = 0x%x; dropping connection", 818 bhsdo->bhsdo_flags); 819 cfiscsi_session_terminate(cs); 820 return (true); 821 } 822 823 if (io->scsiio.ext_data_filled != io->scsiio.kern_total_len) { 824 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 825 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 826 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 827 "transmitted size was %zd bytes instead of %d; " 828 "dropping connection", 829 (size_t)io->scsiio.ext_data_filled, 830 io->scsiio.kern_total_len); 831 cfiscsi_session_terminate(cs); 832 return (true); 833 } else { 834 /* 835 * For SCSI Command PDU, this just means we need to 836 * solicit more data by sending R2T. 837 */ 838 return (false); 839 } 840 } 841#if 0 842 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 843 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 844#endif 845 846 return (true); 847 } 848 849 return (false); 850} 851 852static void 853cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 854{ 855 struct iscsi_bhs_data_out *bhsdo; 856 struct cfiscsi_session *cs; 857 struct cfiscsi_data_wait *cdw = NULL; 858 union ctl_io *io; 859 bool done; 860 861 cs = PDU_SESSION(request); 862 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 863 864 CFISCSI_SESSION_LOCK(cs); 865 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 866#if 0 867 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 868 "ttt 0x%x, itt 0x%x", 869 bhsdo->bhsdo_target_transfer_tag, 870 bhsdo->bhsdo_initiator_task_tag, 871 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 872#endif 873 if (bhsdo->bhsdo_target_transfer_tag == 874 cdw->cdw_target_transfer_tag) 875 break; 876 } 877 CFISCSI_SESSION_UNLOCK(cs); 878 if (cdw == NULL) { 879 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 880 "0x%x, not found; dropping connection", 881 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 882 icl_pdu_free(request); 883 cfiscsi_session_terminate(cs); 884 return; 885 } 886 887 io = cdw->cdw_ctl_io; 888 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 889 ("CTL_FLAG_DATA_IN")); 890 891 done = cfiscsi_handle_data_segment(request, cdw); 892 if (done) { 893 CFISCSI_SESSION_LOCK(cs); 894 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 895 CFISCSI_SESSION_UNLOCK(cs); 896 uma_zfree(cfiscsi_data_wait_zone, cdw); 897 io->scsiio.be_move_done(io); 898 } 899 900 icl_pdu_free(request); 901} 902 903static void 904cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 905{ 906 struct iscsi_bhs_logout_request *bhslr; 907 struct iscsi_bhs_logout_response *bhslr2; 908 struct icl_pdu *response; 909 struct cfiscsi_session *cs; 910 911 cs = PDU_SESSION(request); 912 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 913 switch (bhslr->bhslr_reason & 0x7f) { 914 case BHSLR_REASON_CLOSE_SESSION: 915 case BHSLR_REASON_CLOSE_CONNECTION: 916 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 917 if (response == NULL) { 918 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 919 icl_pdu_free(request); 920 cfiscsi_session_terminate(cs); 921 return; 922 } 923 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 924 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 925 bhslr2->bhslr_flags = 0x80; 926 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 927 bhslr2->bhslr_initiator_task_tag = 928 bhslr->bhslr_initiator_task_tag; 929 icl_pdu_free(request); 930 cfiscsi_pdu_queue(response); 931 cfiscsi_session_terminate(cs); 932 break; 933 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 934 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 935 if (response == NULL) { 936 CFISCSI_SESSION_WARN(cs, 937 "failed to allocate memory; dropping connection"); 938 icl_pdu_free(request); 939 cfiscsi_session_terminate(cs); 940 return; 941 } 942 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 943 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 944 bhslr2->bhslr_flags = 0x80; 945 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 946 bhslr2->bhslr_initiator_task_tag = 947 bhslr->bhslr_initiator_task_tag; 948 icl_pdu_free(request); 949 cfiscsi_pdu_queue(response); 950 break; 951 default: 952 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 953 bhslr->bhslr_reason); 954 icl_pdu_free(request); 955 cfiscsi_session_terminate(cs); 956 break; 957 } 958} 959 960static void 961cfiscsi_callout(void *context) 962{ 963 struct icl_pdu *cp; 964 struct iscsi_bhs_nop_in *bhsni; 965 struct cfiscsi_session *cs; 966 967 cs = context; 968 969 if (cs->cs_terminating) 970 return; 971 972 callout_schedule(&cs->cs_callout, 1 * hz); 973 974 atomic_add_int(&cs->cs_timeout, 1); 975 976#ifdef ICL_KERNEL_PROXY 977 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 978 if (cs->cs_timeout > login_timeout) { 979 CFISCSI_SESSION_WARN(cs, "login timed out after " 980 "%d seconds; dropping connection", cs->cs_timeout); 981 cfiscsi_session_terminate(cs); 982 } 983 return; 984 } 985#endif 986 987 if (cs->cs_timeout >= ping_timeout) { 988 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 989 "dropping connection", ping_timeout); 990 cfiscsi_session_terminate(cs); 991 return; 992 } 993 994 /* 995 * If the ping was reset less than one second ago - which means 996 * that we've received some PDU during the last second - assume 997 * the traffic flows correctly and don't bother sending a NOP-Out. 998 * 999 * (It's 2 - one for one second, and one for incrementing is_timeout 1000 * earlier in this routine.) 1001 */ 1002 if (cs->cs_timeout < 2) 1003 return; 1004 1005 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1006 if (cp == NULL) { 1007 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1008 return; 1009 } 1010 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1011 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1012 bhsni->bhsni_flags = 0x80; 1013 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1014 1015 cfiscsi_pdu_queue(cp); 1016} 1017 1018static void 1019cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1020{ 1021 struct cfiscsi_data_wait *cdw, *tmpcdw; 1022 union ctl_io *io; 1023 int error; 1024 1025#ifdef notyet 1026 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1027 if (io == NULL) { 1028 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1029 return; 1030 } 1031 ctl_zero_io(io); 1032 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1033 io->io_hdr.io_type = CTL_IO_TASK; 1034 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1035 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1036 io->io_hdr.nexus.targ_target.id = 0; 1037 io->io_hdr.nexus.targ_lun = lun; 1038 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1039 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1040 error = ctl_queue(io); 1041 if (error != CTL_RETVAL_COMPLETE) { 1042 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1043 ctl_free_io(io); 1044 } 1045#else 1046 /* 1047 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1048 * just iterate over tasks that are waiting for something - data - and 1049 * terminate those. 1050 */ 1051 CFISCSI_SESSION_LOCK(cs); 1052 TAILQ_FOREACH_SAFE(cdw, 1053 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1054 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1055 if (io == NULL) { 1056 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1057 return; 1058 } 1059 ctl_zero_io(io); 1060 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1061 io->io_hdr.io_type = CTL_IO_TASK; 1062 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1063 io->io_hdr.nexus.targ_port = 1064 cs->cs_target->ct_softc->fe.targ_port; 1065 io->io_hdr.nexus.targ_target.id = 0; 1066 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1067 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1068 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1069 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1070 error = ctl_queue(io); 1071 if (error != CTL_RETVAL_COMPLETE) { 1072 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1073 ctl_free_io(io); 1074 return; 1075 } 1076#if 0 1077 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1078 "0x%x", cdw->cdw_initiator_task_tag); 1079#endif 1080 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1081 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1082 uma_zfree(cfiscsi_data_wait_zone, cdw); 1083 } 1084 CFISCSI_SESSION_UNLOCK(cs); 1085#endif 1086} 1087 1088static void 1089cfiscsi_maintenance_thread(void *arg) 1090{ 1091 struct cfiscsi_session *cs; 1092 1093 cs = arg; 1094 1095 for (;;) { 1096 CFISCSI_SESSION_LOCK(cs); 1097 if (cs->cs_terminating == false) 1098 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1099 CFISCSI_SESSION_UNLOCK(cs); 1100 1101 if (cs->cs_terminating) { 1102 cfiscsi_session_terminate_tasks(cs); 1103 callout_drain(&cs->cs_callout); 1104 1105 icl_conn_shutdown(cs->cs_conn); 1106 icl_conn_close(cs->cs_conn); 1107 1108 cs->cs_terminating++; 1109 1110 /* 1111 * XXX: We used to wait up to 30 seconds to deliver queued PDUs 1112 * to the initiator. We also tried hard to deliver SCSI Responses 1113 * for the aborted PDUs. We don't do that anymore. We might need 1114 * to revisit that. 1115 */ 1116 1117 cfiscsi_session_delete(cs); 1118 kthread_exit(); 1119 return; 1120 } 1121 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1122 } 1123} 1124 1125static void 1126cfiscsi_session_terminate(struct cfiscsi_session *cs) 1127{ 1128 1129 if (cs->cs_terminating != 0) 1130 return; 1131 cs->cs_terminating = 1; 1132 cv_signal(&cs->cs_maintenance_cv); 1133#ifdef ICL_KERNEL_PROXY 1134 cv_signal(&cs->cs_login_cv); 1135#endif 1136} 1137 1138static int 1139cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1140{ 1141 int error, i; 1142 struct cfiscsi_softc *softc; 1143 1144 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1145 1146 softc = &cfiscsi_softc; 1147 1148 mtx_lock(&softc->lock); 1149 for (i = 0; i < softc->max_initiators; i++) { 1150 if (softc->ctl_initids[i] == 0) 1151 break; 1152 } 1153 if (i == softc->max_initiators) { 1154 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1155 softc->max_initiators); 1156 mtx_unlock(&softc->lock); 1157 return (1); 1158 } 1159 softc->ctl_initids[i] = 1; 1160 mtx_unlock(&softc->lock); 1161 1162#if 0 1163 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1164 i, softc->max_initiators); 1165#endif 1166 cs->cs_ctl_initid = i; 1167 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1168 if (error != 0) { 1169 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1170 mtx_lock(&softc->lock); 1171 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1172 mtx_unlock(&softc->lock); 1173 cs->cs_ctl_initid = -1; 1174 return (1); 1175 } 1176 1177 return (0); 1178} 1179 1180static void 1181cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1182{ 1183 int error; 1184 struct cfiscsi_softc *softc; 1185 1186 if (cs->cs_ctl_initid == -1) 1187 return; 1188 1189 softc = &cfiscsi_softc; 1190 1191 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1192 if (error != 0) { 1193 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1194 error); 1195 } 1196 mtx_lock(&softc->lock); 1197 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1198 mtx_unlock(&softc->lock); 1199 cs->cs_ctl_initid = -1; 1200} 1201 1202static struct cfiscsi_session * 1203cfiscsi_session_new(struct cfiscsi_softc *softc) 1204{ 1205 struct cfiscsi_session *cs; 1206 int error; 1207 1208 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1209 if (cs == NULL) { 1210 CFISCSI_WARN("malloc failed"); 1211 return (NULL); 1212 } 1213 cs->cs_ctl_initid = -1; 1214 1215 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1216 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1217 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1218 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1219#ifdef ICL_KERNEL_PROXY 1220 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1221#endif 1222 1223 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1224 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1225 cs->cs_conn->ic_error = cfiscsi_error_callback; 1226 cs->cs_conn->ic_prv0 = cs; 1227 1228 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1229 if (error != 0) { 1230 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1231 free(cs, M_CFISCSI); 1232 return (NULL); 1233 } 1234 1235 mtx_lock(&softc->lock); 1236 cs->cs_id = softc->last_session_id + 1; 1237 softc->last_session_id++; 1238 mtx_unlock(&softc->lock); 1239 1240 mtx_lock(&softc->lock); 1241 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1242 mtx_unlock(&softc->lock); 1243 1244 /* 1245 * Start pinging the initiator. 1246 */ 1247 callout_init(&cs->cs_callout, 1); 1248 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1249 1250 return (cs); 1251} 1252 1253static void 1254cfiscsi_session_delete(struct cfiscsi_session *cs) 1255{ 1256 struct cfiscsi_softc *softc; 1257 1258 softc = &cfiscsi_softc; 1259 1260 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1261 ("destroying session with outstanding CTL pdus")); 1262 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1263 ("destroying session with non-empty queue")); 1264 1265 cfiscsi_session_unregister_initiator(cs); 1266 if (cs->cs_target != NULL) 1267 cfiscsi_target_release(cs->cs_target); 1268 icl_conn_close(cs->cs_conn); 1269 icl_conn_free(cs->cs_conn); 1270 1271 mtx_lock(&softc->lock); 1272 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1273 mtx_unlock(&softc->lock); 1274 1275 free(cs, M_CFISCSI); 1276} 1277 1278int 1279cfiscsi_init(void) 1280{ 1281 struct cfiscsi_softc *softc; 1282 struct ctl_frontend *fe; 1283 int retval; 1284 1285 softc = &cfiscsi_softc; 1286 retval = 0; 1287 bzero(softc, sizeof(*softc)); 1288 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1289 1290#ifdef ICL_KERNEL_PROXY 1291 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1292#endif 1293 TAILQ_INIT(&softc->sessions); 1294 TAILQ_INIT(&softc->targets); 1295 1296 fe = &softc->fe; 1297 fe->port_type = CTL_PORT_ISCSI; 1298 /* XXX KDM what should the real number be here? */ 1299 fe->num_requested_ctl_io = 4096; 1300 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1301 fe->port_name = softc->port_name; 1302 fe->port_online = cfiscsi_online; 1303 fe->port_offline = cfiscsi_offline; 1304 fe->onoff_arg = softc; 1305 fe->targ_enable = cfiscsi_targ_enable; 1306 fe->targ_disable = cfiscsi_targ_disable; 1307 fe->lun_enable = cfiscsi_lun_enable; 1308 fe->lun_disable = cfiscsi_lun_disable; 1309 fe->targ_lun_arg = softc; 1310 fe->ioctl = cfiscsi_ioctl; 1311 fe->devid = cfiscsi_devid; 1312 fe->fe_datamove = cfiscsi_datamove; 1313 fe->fe_done = cfiscsi_done; 1314 1315 /* XXX KDM what should we report here? */ 1316 /* XXX These should probably be fetched from CTL. */ 1317 fe->max_targets = 1; 1318 fe->max_target_id = 15; 1319 1320 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1321 if (retval != 0) { 1322 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1323 retval); 1324 retval = 1; 1325 goto bailout; 1326 } 1327 1328 softc->max_initiators = fe->max_initiators; 1329 1330 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1331 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1332 UMA_ALIGN_PTR, 0); 1333 1334 return (0); 1335 1336bailout: 1337 return (retval); 1338} 1339 1340static int 1341cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1342{ 1343 1344 switch (what) { 1345 case MOD_LOAD: 1346 return (cfiscsi_init()); 1347 case MOD_UNLOAD: 1348 return (EBUSY); 1349 default: 1350 return (EOPNOTSUPP); 1351 } 1352} 1353 1354#ifdef ICL_KERNEL_PROXY 1355static void 1356cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1357{ 1358 struct cfiscsi_session *cs; 1359 1360 cs = cfiscsi_session_new(&cfiscsi_softc); 1361 if (cs == NULL) { 1362 CFISCSI_WARN("failed to create session"); 1363 return; 1364 } 1365 1366 icl_conn_handoff_sock(cs->cs_conn, so); 1367 cs->cs_initiator_sa = sa; 1368 cs->cs_portal_id = portal_id; 1369 cs->cs_waiting_for_ctld = true; 1370 cv_signal(&cfiscsi_softc.accept_cv); 1371} 1372#endif 1373 1374static void 1375cfiscsi_online(void *arg) 1376{ 1377 struct cfiscsi_softc *softc; 1378 1379 softc = (struct cfiscsi_softc *)arg; 1380 1381 softc->online = 1; 1382#ifdef ICL_KERNEL_PROXY 1383 if (softc->listener != NULL) 1384 icl_listen_free(softc->listener); 1385 softc->listener = icl_listen_new(cfiscsi_accept); 1386#endif 1387} 1388 1389static void 1390cfiscsi_offline(void *arg) 1391{ 1392 struct cfiscsi_softc *softc; 1393 struct cfiscsi_session *cs; 1394 1395 softc = (struct cfiscsi_softc *)arg; 1396 1397 softc->online = 0; 1398 1399 mtx_lock(&softc->lock); 1400 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1401 cfiscsi_session_terminate(cs); 1402 mtx_unlock(&softc->lock); 1403 1404#ifdef ICL_KERNEL_PROXY 1405 icl_listen_free(softc->listener); 1406 softc->listener = NULL; 1407#endif 1408} 1409 1410static int 1411cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1412{ 1413 1414 return (0); 1415} 1416 1417static int 1418cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1419{ 1420 1421 return (0); 1422} 1423 1424static void 1425cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1426{ 1427 struct cfiscsi_softc *softc; 1428 struct cfiscsi_session *cs; 1429 struct cfiscsi_target *ct; 1430 struct ctl_iscsi_handoff_params *cihp; 1431 int error; 1432 1433 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1434 softc = &cfiscsi_softc; 1435 1436 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1437 cihp->initiator_name, cihp->initiator_addr, 1438 cihp->target_name); 1439 1440 if (softc->online == 0) { 1441 ci->status = CTL_ISCSI_ERROR; 1442 snprintf(ci->error_str, sizeof(ci->error_str), 1443 "%s: port offline", __func__); 1444 return; 1445 } 1446 1447 ct = cfiscsi_target_find(softc, cihp->target_name); 1448 if (ct == NULL) { 1449 ci->status = CTL_ISCSI_ERROR; 1450 snprintf(ci->error_str, sizeof(ci->error_str), 1451 "%s: target not found", __func__); 1452 return; 1453 } 1454 1455#ifdef ICL_KERNEL_PROXY 1456 if (cihp->socket > 0 && cihp->connection_id > 0) { 1457 snprintf(ci->error_str, sizeof(ci->error_str), 1458 "both socket and connection_id set"); 1459 ci->status = CTL_ISCSI_ERROR; 1460 cfiscsi_target_release(ct); 1461 return; 1462 } 1463 if (cihp->socket == 0) { 1464 mtx_lock(&cfiscsi_softc.lock); 1465 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1466 if (cs->cs_id == cihp->socket) 1467 break; 1468 } 1469 if (cs == NULL) { 1470 mtx_unlock(&cfiscsi_softc.lock); 1471 snprintf(ci->error_str, sizeof(ci->error_str), 1472 "connection not found"); 1473 ci->status = CTL_ISCSI_ERROR; 1474 cfiscsi_target_release(ct); 1475 return; 1476 } 1477 mtx_unlock(&cfiscsi_softc.lock); 1478 } else { 1479#endif 1480 cs = cfiscsi_session_new(softc); 1481 if (cs == NULL) { 1482 ci->status = CTL_ISCSI_ERROR; 1483 snprintf(ci->error_str, sizeof(ci->error_str), 1484 "%s: cfiscsi_session_new failed", __func__); 1485 cfiscsi_target_release(ct); 1486 return; 1487 } 1488#ifdef ICL_KERNEL_PROXY 1489 } 1490#endif 1491 cs->cs_target = ct; 1492 1493 /* 1494 * First PDU of Full Feature phase has the same CmdSN as the last 1495 * PDU from the Login Phase received from the initiator. Thus, 1496 * the -1 below. 1497 */ 1498 cs->cs_portal_group_tag = cihp->portal_group_tag; 1499 cs->cs_cmdsn = cihp->cmdsn; 1500 cs->cs_statsn = cihp->statsn; 1501 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1502 cs->cs_max_burst_length = cihp->max_burst_length; 1503 cs->cs_immediate_data = !!cihp->immediate_data; 1504 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1505 cs->cs_conn->ic_header_crc32c = true; 1506 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1507 cs->cs_conn->ic_data_crc32c = true; 1508 1509 strlcpy(cs->cs_initiator_name, 1510 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1511 strlcpy(cs->cs_initiator_addr, 1512 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1513 strlcpy(cs->cs_initiator_alias, 1514 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1515 1516#ifdef ICL_KERNEL_PROXY 1517 if (cihp->socket > 0) { 1518#endif 1519 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1520 if (error != 0) { 1521 cfiscsi_session_delete(cs); 1522 ci->status = CTL_ISCSI_ERROR; 1523 snprintf(ci->error_str, sizeof(ci->error_str), 1524 "%s: icl_conn_handoff failed with error %d", 1525 __func__, error); 1526 return; 1527 } 1528#ifdef ICL_KERNEL_PROXY 1529 } 1530#endif 1531 1532 /* 1533 * Register initiator with CTL. 1534 */ 1535 cfiscsi_session_register_initiator(cs); 1536 1537#ifdef ICL_KERNEL_PROXY 1538 cs->cs_login_phase = false; 1539 1540 /* 1541 * First PDU of the Full Feature phase has likely already arrived. 1542 * We have to pick it up and execute properly. 1543 */ 1544 if (cs->cs_login_pdu != NULL) { 1545 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1546 cfiscsi_pdu_handle(cs->cs_login_pdu); 1547 cs->cs_login_pdu = NULL; 1548 } 1549#endif 1550 1551 ci->status = CTL_ISCSI_OK; 1552} 1553 1554static void 1555cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1556{ 1557 struct ctl_iscsi_list_params *cilp; 1558 struct cfiscsi_session *cs; 1559 struct cfiscsi_softc *softc; 1560 struct sbuf *sb; 1561 int error; 1562 1563 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1564 softc = &cfiscsi_softc; 1565 1566 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1567 if (sb == NULL) { 1568 ci->status = CTL_ISCSI_ERROR; 1569 snprintf(ci->error_str, sizeof(ci->error_str), 1570 "Unable to allocate %d bytes for iSCSI session list", 1571 cilp->alloc_len); 1572 return; 1573 } 1574 1575 sbuf_printf(sb, "<ctlislist>\n"); 1576 mtx_lock(&softc->lock); 1577 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1578#ifdef ICL_KERNEL_PROXY 1579 if (cs->cs_target == NULL) 1580 continue; 1581#endif 1582 error = sbuf_printf(sb, "<connection id=\"%d\">" 1583 "<initiator>%s</initiator>" 1584 "<initiator_addr>%s</initiator_addr>" 1585 "<initiator_alias>%s</initiator_alias>" 1586 "<target>%s</target>" 1587 "<target_alias>%s</target_alias>" 1588 "<header_digest>%s</header_digest>" 1589 "<data_digest>%s</data_digest>" 1590 "<max_data_segment_length>%zd</max_data_segment_length>" 1591 "<immediate_data>%d</immediate_data>" 1592 "<iser>%d</iser>" 1593 "</connection>\n", 1594 cs->cs_id, 1595 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1596 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1597 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1598 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1599 cs->cs_max_data_segment_length, 1600 cs->cs_immediate_data, 1601 cs->cs_conn->ic_iser); 1602 if (error != 0) 1603 break; 1604 } 1605 mtx_unlock(&softc->lock); 1606 error = sbuf_printf(sb, "</ctlislist>\n"); 1607 if (error != 0) { 1608 sbuf_delete(sb); 1609 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1610 snprintf(ci->error_str, sizeof(ci->error_str), 1611 "Out of space, %d bytes is too small", cilp->alloc_len); 1612 return; 1613 } 1614 sbuf_finish(sb); 1615 1616 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1617 cilp->fill_len = sbuf_len(sb) + 1; 1618 ci->status = CTL_ISCSI_OK; 1619 sbuf_delete(sb); 1620} 1621 1622static void 1623cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1624{ 1625 struct icl_pdu *response; 1626 struct iscsi_bhs_asynchronous_message *bhsam; 1627 struct ctl_iscsi_terminate_params *citp; 1628 struct cfiscsi_session *cs; 1629 struct cfiscsi_softc *softc; 1630 int found = 0; 1631 1632 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1633 softc = &cfiscsi_softc; 1634 1635 mtx_lock(&softc->lock); 1636 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1637 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1638 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1639 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1640 continue; 1641 1642 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1643 if (response == NULL) { 1644 /* 1645 * Oh well. Just terminate the connection. 1646 */ 1647 } else { 1648 bhsam = (struct iscsi_bhs_asynchronous_message *) 1649 response->ip_bhs; 1650 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1651 bhsam->bhsam_flags = 0x80; 1652 bhsam->bhsam_0xffffffff = 0xffffffff; 1653 bhsam->bhsam_async_event = 1654 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1655 cfiscsi_pdu_queue(response); 1656 } 1657 cfiscsi_session_terminate(cs); 1658 found++; 1659 } 1660 mtx_unlock(&softc->lock); 1661 1662 if (found == 0) { 1663 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1664 snprintf(ci->error_str, sizeof(ci->error_str), 1665 "No matching connections found"); 1666 return; 1667 } 1668 1669 ci->status = CTL_ISCSI_OK; 1670} 1671 1672static void 1673cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1674{ 1675 struct icl_pdu *response; 1676 struct iscsi_bhs_asynchronous_message *bhsam; 1677 struct ctl_iscsi_logout_params *cilp; 1678 struct cfiscsi_session *cs; 1679 struct cfiscsi_softc *softc; 1680 int found = 0; 1681 1682 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1683 softc = &cfiscsi_softc; 1684 1685 mtx_lock(&softc->lock); 1686 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1687 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1688 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1689 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1690 continue; 1691 1692 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1693 if (response == NULL) { 1694 ci->status = CTL_ISCSI_ERROR; 1695 snprintf(ci->error_str, sizeof(ci->error_str), 1696 "Unable to allocate memory"); 1697 mtx_unlock(&softc->lock); 1698 return; 1699 } 1700 bhsam = 1701 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1702 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1703 bhsam->bhsam_flags = 0x80; 1704 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1705 bhsam->bhsam_parameter3 = htons(10); 1706 cfiscsi_pdu_queue(response); 1707 found++; 1708 } 1709 mtx_unlock(&softc->lock); 1710 1711 if (found == 0) { 1712 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1713 snprintf(ci->error_str, sizeof(ci->error_str), 1714 "No matching connections found"); 1715 return; 1716 } 1717 1718 ci->status = CTL_ISCSI_OK; 1719} 1720 1721#ifdef ICL_KERNEL_PROXY 1722static void 1723cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1724{ 1725 struct ctl_iscsi_listen_params *cilp; 1726 struct sockaddr *sa; 1727 int error; 1728 1729 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1730 1731 if (cfiscsi_softc.listener == NULL) { 1732 CFISCSI_DEBUG("no listener"); 1733 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1734 ci->status = CTL_ISCSI_ERROR; 1735 return; 1736 } 1737 1738 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1739 if (error != 0) { 1740 CFISCSI_DEBUG("getsockaddr, error %d", error); 1741 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1742 ci->status = CTL_ISCSI_ERROR; 1743 return; 1744 } 1745 1746 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1747 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1748 if (error != 0) { 1749 free(sa, M_SONAME); 1750 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1751 snprintf(ci->error_str, sizeof(ci->error_str), 1752 "icl_listen_add failed, error %d", error); 1753 ci->status = CTL_ISCSI_ERROR; 1754 return; 1755 } 1756 1757 ci->status = CTL_ISCSI_OK; 1758} 1759 1760static void 1761cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1762{ 1763 struct ctl_iscsi_accept_params *ciap; 1764 struct cfiscsi_session *cs; 1765 int error; 1766 1767 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1768 1769 mtx_lock(&cfiscsi_softc.lock); 1770 for (;;) { 1771 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1772 if (cs->cs_waiting_for_ctld) 1773 break; 1774 } 1775 if (cs != NULL) 1776 break; 1777 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1778 if (error != 0) { 1779 mtx_unlock(&cfiscsi_softc.lock); 1780 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1781 ci->status = CTL_ISCSI_ERROR; 1782 return; 1783 } 1784 } 1785 mtx_unlock(&cfiscsi_softc.lock); 1786 1787 cs->cs_waiting_for_ctld = false; 1788 cs->cs_login_phase = true; 1789 1790 ciap->connection_id = cs->cs_id; 1791 ciap->portal_id = cs->cs_portal_id; 1792 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1793 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1794 cs->cs_initiator_sa->sa_len); 1795 if (error != 0) { 1796 snprintf(ci->error_str, sizeof(ci->error_str), 1797 "copyout failed with error %d", error); 1798 ci->status = CTL_ISCSI_ERROR; 1799 return; 1800 } 1801 1802 ci->status = CTL_ISCSI_OK; 1803} 1804 1805static void 1806cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1807{ 1808 struct ctl_iscsi_send_params *cisp; 1809 struct cfiscsi_session *cs; 1810 struct icl_pdu *ip; 1811 size_t datalen; 1812 void *data; 1813 int error; 1814 1815 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1816 1817 mtx_lock(&cfiscsi_softc.lock); 1818 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1819 if (cs->cs_id == cisp->connection_id) 1820 break; 1821 } 1822 if (cs == NULL) { 1823 mtx_unlock(&cfiscsi_softc.lock); 1824 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1825 ci->status = CTL_ISCSI_ERROR; 1826 return; 1827 } 1828 mtx_unlock(&cfiscsi_softc.lock); 1829 1830#if 0 1831 if (cs->cs_login_phase == false) 1832 return (EBUSY); 1833#endif 1834 1835 if (cs->cs_terminating) { 1836 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1837 ci->status = CTL_ISCSI_ERROR; 1838 return; 1839 } 1840 1841 datalen = cisp->data_segment_len; 1842 /* 1843 * XXX 1844 */ 1845 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1846 if (datalen > 65535) { 1847 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1848 ci->status = CTL_ISCSI_ERROR; 1849 return; 1850 } 1851 if (datalen > 0) { 1852 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1853 error = copyin(cisp->data_segment, data, datalen); 1854 if (error != 0) { 1855 free(data, M_CFISCSI); 1856 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1857 ci->status = CTL_ISCSI_ERROR; 1858 return; 1859 } 1860 } 1861 1862 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1863 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1864 if (datalen > 0) { 1865 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1866 free(data, M_CFISCSI); 1867 } 1868 CFISCSI_SESSION_LOCK(cs); 1869 icl_pdu_queue(ip); 1870 CFISCSI_SESSION_UNLOCK(cs); 1871 ci->status = CTL_ISCSI_OK; 1872} 1873 1874static void 1875cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1876{ 1877 struct ctl_iscsi_receive_params *cirp; 1878 struct cfiscsi_session *cs; 1879 struct icl_pdu *ip; 1880 void *data; 1881 int error; 1882 1883 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1884 1885 mtx_lock(&cfiscsi_softc.lock); 1886 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1887 if (cs->cs_id == cirp->connection_id) 1888 break; 1889 } 1890 if (cs == NULL) { 1891 mtx_unlock(&cfiscsi_softc.lock); 1892 snprintf(ci->error_str, sizeof(ci->error_str), 1893 "connection not found"); 1894 ci->status = CTL_ISCSI_ERROR; 1895 return; 1896 } 1897 mtx_unlock(&cfiscsi_softc.lock); 1898 1899#if 0 1900 if (is->is_login_phase == false) 1901 return (EBUSY); 1902#endif 1903 1904 CFISCSI_SESSION_LOCK(cs); 1905 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1906 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1907 if (error != 0) { 1908 CFISCSI_SESSION_UNLOCK(cs); 1909 snprintf(ci->error_str, sizeof(ci->error_str), 1910 "interrupted by signal"); 1911 ci->status = CTL_ISCSI_ERROR; 1912 return; 1913 } 1914 } 1915 1916 if (cs->cs_terminating) { 1917 CFISCSI_SESSION_UNLOCK(cs); 1918 snprintf(ci->error_str, sizeof(ci->error_str), 1919 "connection terminating"); 1920 ci->status = CTL_ISCSI_ERROR; 1921 return; 1922 } 1923 ip = cs->cs_login_pdu; 1924 cs->cs_login_pdu = NULL; 1925 CFISCSI_SESSION_UNLOCK(cs); 1926 1927 if (ip->ip_data_len > cirp->data_segment_len) { 1928 icl_pdu_free(ip); 1929 snprintf(ci->error_str, sizeof(ci->error_str), 1930 "data segment too big"); 1931 ci->status = CTL_ISCSI_ERROR; 1932 return; 1933 } 1934 1935 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1936 if (ip->ip_data_len > 0) { 1937 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1938 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1939 copyout(data, cirp->data_segment, ip->ip_data_len); 1940 free(data, M_CFISCSI); 1941 } 1942 1943 icl_pdu_free(ip); 1944 ci->status = CTL_ISCSI_OK; 1945} 1946 1947#endif /* !ICL_KERNEL_PROXY */ 1948 1949static int 1950cfiscsi_ioctl(struct cdev *dev, 1951 u_long cmd, caddr_t addr, int flag, struct thread *td) 1952{ 1953 struct ctl_iscsi *ci; 1954 1955 if (cmd != CTL_ISCSI) 1956 return (ENOTTY); 1957 1958 ci = (struct ctl_iscsi *)addr; 1959 switch (ci->type) { 1960 case CTL_ISCSI_HANDOFF: 1961 cfiscsi_ioctl_handoff(ci); 1962 break; 1963 case CTL_ISCSI_LIST: 1964 cfiscsi_ioctl_list(ci); 1965 break; 1966 case CTL_ISCSI_TERMINATE: 1967 cfiscsi_ioctl_terminate(ci); 1968 break; 1969 case CTL_ISCSI_LOGOUT: 1970 cfiscsi_ioctl_logout(ci); 1971 break; 1972#ifdef ICL_KERNEL_PROXY 1973 case CTL_ISCSI_LISTEN: 1974 cfiscsi_ioctl_listen(ci); 1975 break; 1976 case CTL_ISCSI_ACCEPT: 1977 cfiscsi_ioctl_accept(ci); 1978 break; 1979 case CTL_ISCSI_SEND: 1980 cfiscsi_ioctl_send(ci); 1981 break; 1982 case CTL_ISCSI_RECEIVE: 1983 cfiscsi_ioctl_receive(ci); 1984 break; 1985#else 1986 case CTL_ISCSI_LISTEN: 1987 case CTL_ISCSI_ACCEPT: 1988 case CTL_ISCSI_SEND: 1989 case CTL_ISCSI_RECEIVE: 1990 ci->status = CTL_ISCSI_ERROR; 1991 snprintf(ci->error_str, sizeof(ci->error_str), 1992 "%s: CTL compiled without ICL_KERNEL_PROXY", 1993 __func__); 1994 break; 1995#endif /* !ICL_KERNEL_PROXY */ 1996 default: 1997 ci->status = CTL_ISCSI_ERROR; 1998 snprintf(ci->error_str, sizeof(ci->error_str), 1999 "%s: invalid iSCSI request type %d", __func__, ci->type); 2000 break; 2001 } 2002 2003 return (0); 2004} 2005 2006static int 2007cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 2008{ 2009 struct cfiscsi_session *cs; 2010 struct scsi_vpd_device_id *devid_ptr; 2011 struct scsi_vpd_id_descriptor *desc, *desc1; 2012 struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */ 2013 struct scsi_vpd_id_t10 *t10id; 2014 struct ctl_lun *lun; 2015 const struct icl_pdu *request; 2016 size_t devid_len, wwpn_len; 2017 2018 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 2019 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2020 cs = PDU_SESSION(request); 2021 2022 wwpn_len = strlen(cs->cs_target->ct_name); 2023 wwpn_len += strlen(",t,0x01"); 2024 wwpn_len += 1; /* '\0' */ 2025 if ((wwpn_len % 4) != 0) 2026 wwpn_len += (4 - (wwpn_len % 4)); 2027 2028 devid_len = sizeof(struct scsi_vpd_device_id) + 2029 sizeof(struct scsi_vpd_id_descriptor) + 2030 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 2031 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 2032 sizeof(struct scsi_vpd_id_descriptor) + 2033 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 2034 sizeof(struct scsi_vpd_id_descriptor) + 2035 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 2036 2037 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 2038 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 2039 ctsio->kern_sg_entries = 0; 2040 2041 if (devid_len < alloc_len) { 2042 ctsio->residual = alloc_len - devid_len; 2043 ctsio->kern_data_len = devid_len; 2044 ctsio->kern_total_len = devid_len; 2045 } else { 2046 ctsio->residual = 0; 2047 ctsio->kern_data_len = alloc_len; 2048 ctsio->kern_total_len = alloc_len; 2049 } 2050 ctsio->kern_data_resid = 0; 2051 ctsio->kern_rel_offset = 0; 2052 ctsio->kern_sg_entries = 0; 2053 2054 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2055 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2056 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2057 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 2058 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2059 wwpn_len); 2060 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2061 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2062 2063 if (lun != NULL) 2064 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2065 lun->be_lun->lun_type; 2066 else 2067 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2068 2069 devid_ptr->page_code = SVPD_DEVICE_ID; 2070 2071 scsi_ulto2b(devid_len - 4, devid_ptr->length); 2072 2073 /* 2074 * We're using a LUN association here. i.e., this device ID is a 2075 * per-LUN identifier. 2076 */ 2077 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2078 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2079 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 2080 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2081 2082 /* 2083 * If we've actually got a backend, copy the device id from the 2084 * per-LUN data. Otherwise, set it to all spaces. 2085 */ 2086 if (lun != NULL) { 2087 /* 2088 * Copy the backend's LUN ID. 2089 */ 2090 strncpy((char *)t10id->vendor_spec_id, 2091 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2092 } else { 2093 /* 2094 * No backend, set this to spaces. 2095 */ 2096 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2097 } 2098 2099 /* 2100 * desc1 is for the WWPN which is a port asscociation. 2101 */ 2102 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2103 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2104 SVPD_ID_TYPE_SCSI_NAME; 2105 desc1->length = wwpn_len; 2106 snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x", 2107 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2108 2109 /* 2110 * desc2 is for the Relative Target Port(type 4h) identifier 2111 */ 2112 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2113 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2114 SVPD_ID_TYPE_RELTARG; 2115 desc2->length = 4; 2116 desc2->identifier[3] = 1; 2117 2118 /* 2119 * desc3 is for the Target Port Group(type 5h) identifier 2120 */ 2121 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2122 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2123 SVPD_ID_TYPE_TPORTGRP; 2124 desc3->length = 4; 2125 desc3->identifier[3] = 1; 2126 2127 ctsio->scsi_status = SCSI_STATUS_OK; 2128 2129 ctsio->be_move_done = ctl_config_move_done; 2130 ctl_datamove((union ctl_io *)ctsio); 2131 2132 return (CTL_RETVAL_COMPLETE); 2133} 2134 2135static void 2136cfiscsi_target_hold(struct cfiscsi_target *ct) 2137{ 2138 2139 refcount_acquire(&ct->ct_refcount); 2140} 2141 2142static void 2143cfiscsi_target_release(struct cfiscsi_target *ct) 2144{ 2145 struct cfiscsi_softc *softc; 2146 2147 softc = ct->ct_softc; 2148 mtx_lock(&softc->lock); 2149 if (refcount_release(&ct->ct_refcount)) { 2150 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2151 mtx_unlock(&softc->lock); 2152 free(ct, M_CFISCSI); 2153 2154 return; 2155 } 2156 mtx_unlock(&softc->lock); 2157} 2158 2159static struct cfiscsi_target * 2160cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2161{ 2162 struct cfiscsi_target *ct; 2163 2164 mtx_lock(&softc->lock); 2165 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2166 if (strcmp(name, ct->ct_name) != 0) 2167 continue; 2168 cfiscsi_target_hold(ct); 2169 mtx_unlock(&softc->lock); 2170 return (ct); 2171 } 2172 mtx_unlock(&softc->lock); 2173 2174 return (NULL); 2175} 2176 2177static struct cfiscsi_target * 2178cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2179 const char *alias) 2180{ 2181 struct cfiscsi_target *ct, *newct; 2182 int i; 2183 2184 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2185 return (NULL); 2186 2187 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 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 free(newct, M_CFISCSI); 2196 return (ct); 2197 } 2198 2199 for (i = 0; i < CTL_MAX_LUNS; i++) 2200 newct->ct_luns[i] = -1; 2201 2202 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2203 if (alias != NULL) 2204 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2205 refcount_init(&newct->ct_refcount, 1); 2206 newct->ct_softc = softc; 2207 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2208 mtx_unlock(&softc->lock); 2209 2210 return (newct); 2211} 2212 2213/* 2214 * Takes LUN from the target space and returns LUN from the CTL space. 2215 */ 2216static uint32_t 2217cfiscsi_map_lun(void *arg, uint32_t lun) 2218{ 2219 struct cfiscsi_session *cs; 2220 2221 cs = arg; 2222 2223 if (lun >= CTL_MAX_LUNS) { 2224 CFISCSI_DEBUG("requested lun number %d is higher " 2225 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2226 return (0xffffffff); 2227 } 2228 2229 if (cs->cs_target->ct_luns[lun] < 0) 2230 return (0xffffffff); 2231 2232 return (cs->cs_target->ct_luns[lun]); 2233} 2234 2235static int 2236cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2237 unsigned long lun_id, unsigned long ctl_lun_id) 2238{ 2239 2240 if (lun_id >= CTL_MAX_LUNS) { 2241 CFISCSI_WARN("requested lun number %ld is higher " 2242 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2243 return (-1); 2244 } 2245 2246 if (ct->ct_luns[lun_id] >= 0) { 2247 /* 2248 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2249 * when the LUN is created, and a second time just before 2250 * the port is brought online; don't emit warnings 2251 * for that case. 2252 */ 2253 if (ct->ct_luns[lun_id] == ctl_lun_id) 2254 return (0); 2255 CFISCSI_WARN("lun %ld already allocated", lun_id); 2256 return (-1); 2257 } 2258 2259#if 0 2260 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2261 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2262#endif 2263 2264 ct->ct_luns[lun_id] = ctl_lun_id; 2265 cfiscsi_target_hold(ct); 2266 2267 return (0); 2268} 2269 2270static int 2271cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2272{ 2273 2274 if (ct->ct_luns[lun_id] < 0) { 2275 CFISCSI_WARN("lun %ld not allocated", lun_id); 2276 return (-1); 2277 } 2278 2279 ct->ct_luns[lun_id] = -1; 2280 cfiscsi_target_release(ct); 2281 2282 return (0); 2283} 2284 2285static int 2286cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2287{ 2288 struct cfiscsi_softc *softc; 2289 struct cfiscsi_target *ct; 2290 struct ctl_be_lun_option *opt; 2291 const char *target = NULL, *target_alias = NULL; 2292 const char *lun = NULL; 2293 unsigned long tmp; 2294 2295 softc = (struct cfiscsi_softc *)arg; 2296 2297 STAILQ_FOREACH(opt, 2298 &control_softc->ctl_luns[lun_id]->be_lun->options, links) { 2299 if (strcmp(opt->name, "cfiscsi_target") == 0) 2300 target = opt->value; 2301 else if (strcmp(opt->name, "cfiscsi_target_alias") == 0) 2302 target_alias = opt->value; 2303 else if (strcmp(opt->name, "cfiscsi_lun") == 0) 2304 lun = opt->value; 2305 } 2306 2307 if (target == NULL && lun == NULL) 2308 return (0); 2309 2310 if (target == NULL || lun == NULL) { 2311 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2312 "cfiscsi_lun, or the other way around; ignoring"); 2313 return (0); 2314 } 2315 2316 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2317 if (ct == NULL) { 2318 CFISCSI_WARN("failed to create target \"%s\"", target); 2319 return (0); 2320 } 2321 2322 tmp = strtoul(lun, NULL, 10); 2323 cfiscsi_target_set_lun(ct, tmp, lun_id); 2324 cfiscsi_target_release(ct); 2325 return (0); 2326} 2327 2328static int 2329cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2330{ 2331 struct cfiscsi_softc *softc; 2332 struct cfiscsi_target *ct; 2333 int i; 2334 2335 softc = (struct cfiscsi_softc *)arg; 2336 2337 mtx_lock(&softc->lock); 2338 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2339 for (i = 0; i < CTL_MAX_LUNS; i++) { 2340 if (ct->ct_luns[i] < 0) 2341 continue; 2342 if (ct->ct_luns[i] != lun_id) 2343 continue; 2344 mtx_unlock(&softc->lock); 2345 cfiscsi_target_unset_lun(ct, i); 2346 return (0); 2347 } 2348 } 2349 mtx_unlock(&softc->lock); 2350 return (0); 2351} 2352 2353static void 2354cfiscsi_datamove_in(union ctl_io *io) 2355{ 2356 struct cfiscsi_session *cs; 2357 struct icl_pdu *request, *response; 2358 const struct iscsi_bhs_scsi_command *bhssc; 2359 struct iscsi_bhs_data_in *bhsdi; 2360 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2361 size_t len, expected_len, sg_len, buffer_offset; 2362 const char *sg_addr; 2363 int ctl_sg_count, error, i; 2364 2365 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2366 cs = PDU_SESSION(request); 2367 2368 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2369 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2370 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2371 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2372 2373 if (io->scsiio.kern_sg_entries > 0) { 2374 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2375 ctl_sg_count = io->scsiio.kern_sg_entries; 2376 } else { 2377 ctl_sglist = &ctl_sg_entry; 2378 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2379 ctl_sglist->len = io->scsiio.kern_data_len; 2380 ctl_sg_count = 1; 2381 } 2382 2383 /* 2384 * This is the total amount of data to be transferred within the current 2385 * SCSI command. We need to record it so that we can properly report 2386 * underflow/underflow. 2387 */ 2388 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2389 2390 /* 2391 * This is the offset within the current SCSI command; for the first 2392 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2393 * it will be the sum of lengths of previous ones. It's being 2394 * incremented as we append data to the data segment. 2395 */ 2396 buffer_offset = io->scsiio.kern_rel_offset; 2397 2398 /* 2399 * This is the transfer length expected by the initiator. In theory, 2400 * it could be different from the correct amount of data from the SCSI 2401 * point of view, even if that doesn't make any sense. 2402 */ 2403 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2404#if 0 2405 if (expected_len != io->scsiio.kern_total_len) 2406 CFISCSI_SESSION_DEBUG(cs, "expected transfer length = %zd, " 2407 "actual length = %zd", expected_len, 2408 io->scsiio.kern_total_len); 2409#endif 2410 2411 if (buffer_offset >= expected_len) { 2412#if 0 2413 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2414 "already sent the expected len", buffer_offset); 2415#endif 2416 io->scsiio.ext_data_filled = io->scsiio.kern_total_len; 2417 io->scsiio.be_move_done(io); 2418 return; 2419 } 2420 2421 i = 0; 2422 sg_addr = NULL; 2423 sg_len = 0; 2424 response = NULL; 2425 bhsdi = NULL; 2426 for (;;) { 2427 if (response == NULL) { 2428 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2429 if (response == NULL) { 2430 CFISCSI_SESSION_WARN(cs, "failed to " 2431 "allocate memory; dropping connection"); 2432 ctl_set_busy(&io->scsiio); 2433 io->scsiio.be_move_done(io); 2434 cfiscsi_session_terminate(cs); 2435 return; 2436 } 2437 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2438 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2439 bhsdi->bhsdi_initiator_task_tag = 2440 bhssc->bhssc_initiator_task_tag; 2441 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2442 PDU_EXPDATASN(request)++; 2443 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2444 } 2445 2446 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2447 if (sg_len == 0) { 2448 sg_addr = ctl_sglist[i].addr; 2449 sg_len = ctl_sglist[i].len; 2450 KASSERT(sg_len > 0, ("sg_len <= 0")); 2451 } 2452 2453 len = sg_len; 2454 2455 /* 2456 * Truncate to maximum data segment length. 2457 */ 2458 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2459 ("max_data_segment_length %zd >= ip_data_len %zd", 2460 response->ip_data_len, cs->cs_max_data_segment_length)); 2461 if (response->ip_data_len + len > 2462 cs->cs_max_data_segment_length) 2463 len = cs->cs_max_data_segment_length - 2464 response->ip_data_len; 2465 2466 /* 2467 * Truncate to expected data transfer length. 2468 */ 2469 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2470 ("%zd >= %zd", buffer_offset + response->ip_data_len, expected_len)); 2471 if (buffer_offset + response->ip_data_len + len > expected_len) { 2472 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2473 "to expected data transfer length %zd", 2474 buffer_offset + response->ip_data_len + len, expected_len); 2475 len = expected_len - (buffer_offset + response->ip_data_len); 2476 } 2477 2478 KASSERT(len <= sg_len, ("len > sg_len")); 2479 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2480 if (error != 0) { 2481 CFISCSI_SESSION_WARN(cs, "failed to " 2482 "allocate memory; dropping connection"); 2483 icl_pdu_free(response); 2484 ctl_set_busy(&io->scsiio); 2485 io->scsiio.be_move_done(io); 2486 cfiscsi_session_terminate(cs); 2487 return; 2488 } 2489 sg_addr += len; 2490 sg_len -= len; 2491 buffer_offset += len; 2492 io->scsiio.ext_data_filled += len; 2493 2494 if (buffer_offset == expected_len) { 2495 /* 2496 * Already have the amount of data the initiator wanted. 2497 */ 2498 break; 2499 } 2500 2501 if (sg_len == 0) { 2502 /* 2503 * End of scatter-gather segment; 2504 * proceed to the next one... 2505 */ 2506 if (i == ctl_sg_count - 1) { 2507 /* 2508 * ... unless this was the last one. 2509 */ 2510 break; 2511 } 2512 i++; 2513 } 2514 2515 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2516 /* 2517 * Can't stuff more data into the current PDU; 2518 * queue it. Note that's not enough to check 2519 * for kern_data_resid == 0 instead; there 2520 * may be several Data-In PDUs for the final 2521 * call to cfiscsi_datamove(), and we want 2522 * to set the F flag only on the last of them. 2523 */ 2524 if (buffer_offset == io->scsiio.kern_total_len || 2525 buffer_offset == expected_len) 2526 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2527 cfiscsi_pdu_queue(response); 2528 response = NULL; 2529 bhsdi = NULL; 2530 } 2531 } 2532 if (response != NULL) { 2533 if (buffer_offset == io->scsiio.kern_total_len || 2534 buffer_offset == expected_len) 2535 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2536 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2537 cfiscsi_pdu_queue(response); 2538 } 2539 2540 io->scsiio.be_move_done(io); 2541} 2542 2543static void 2544cfiscsi_datamove_out(union ctl_io *io) 2545{ 2546 struct cfiscsi_session *cs; 2547 struct icl_pdu *request, *response; 2548 const struct iscsi_bhs_scsi_command *bhssc; 2549 struct iscsi_bhs_r2t *bhsr2t; 2550 struct cfiscsi_data_wait *cdw; 2551 uint32_t target_transfer_tag; 2552 bool done; 2553 2554 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2555 cs = PDU_SESSION(request); 2556 2557 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2558 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2559 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2560 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2561 2562 /* 2563 * We need to record it so that we can properly report 2564 * underflow/underflow. 2565 */ 2566 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2567 2568 target_transfer_tag = 2569 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2570 2571#if 0 2572 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2573 "task tag 0x%x, target transfer tag 0x%x", 2574 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2575#endif 2576 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2577 if (cdw == NULL) { 2578 CFISCSI_SESSION_WARN(cs, "failed to " 2579 "allocate memory; dropping connection"); 2580 ctl_set_busy(&io->scsiio); 2581 io->scsiio.be_move_done(io); 2582 cfiscsi_session_terminate(cs); 2583 return; 2584 } 2585 cdw->cdw_ctl_io = io; 2586 cdw->cdw_target_transfer_tag = target_transfer_tag; 2587 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2588 2589 if (cs->cs_immediate_data && icl_pdu_data_segment_length(request) > 0) { 2590 done = cfiscsi_handle_data_segment(request, cdw); 2591 if (done) { 2592 uma_zfree(cfiscsi_data_wait_zone, cdw); 2593 io->scsiio.be_move_done(io); 2594 return; 2595 } 2596 2597#if 0 2598 if (io->scsiio.ext_data_filled != 0) 2599 CFISCSI_SESSION_DEBUG(cs, "got %zd bytes of immediate data, need %zd", 2600 io->scsiio.ext_data_filled, io->scsiio.kern_data_len); 2601#endif 2602 } 2603 2604 CFISCSI_SESSION_LOCK(cs); 2605 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2606 CFISCSI_SESSION_UNLOCK(cs); 2607 2608 /* 2609 * XXX: We should limit the number of outstanding R2T PDUs 2610 * per task to MaxOutstandingR2T. 2611 */ 2612 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2613 if (response == NULL) { 2614 CFISCSI_SESSION_WARN(cs, "failed to " 2615 "allocate memory; dropping connection"); 2616 ctl_set_busy(&io->scsiio); 2617 io->scsiio.be_move_done(io); 2618 cfiscsi_session_terminate(cs); 2619 return; 2620 } 2621 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2622 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2623 bhsr2t->bhsr2t_flags = 0x80; 2624 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2625 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2626 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2627 /* 2628 * XXX: Here we assume that cfiscsi_datamove() won't ever 2629 * be running concurrently on several CPUs for a given 2630 * command. 2631 */ 2632 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2633 PDU_R2TSN(request)++; 2634 /* 2635 * This is the offset within the current SCSI command; 2636 * i.e. for the first call of datamove(), it will be 0, 2637 * and for subsequent ones it will be the sum of lengths 2638 * of previous ones. 2639 * 2640 * The ext_data_filled is to account for unsolicited 2641 * (immediate) data that might have already arrived. 2642 */ 2643 bhsr2t->bhsr2t_buffer_offset = 2644 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2645 /* 2646 * This is the total length (sum of S/G lengths) this call 2647 * to cfiscsi_datamove() is supposed to handle. 2648 * 2649 * XXX: Limit it to MaxBurstLength. 2650 */ 2651 bhsr2t->bhsr2t_desired_data_transfer_length = 2652 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2653 cfiscsi_pdu_queue(response); 2654} 2655 2656static void 2657cfiscsi_datamove(union ctl_io *io) 2658{ 2659 2660 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2661 cfiscsi_datamove_in(io); 2662 else 2663 cfiscsi_datamove_out(io); 2664} 2665 2666static void 2667cfiscsi_scsi_command_done(union ctl_io *io) 2668{ 2669 struct icl_pdu *request, *response; 2670 struct iscsi_bhs_scsi_command *bhssc; 2671 struct iscsi_bhs_scsi_response *bhssr; 2672#ifdef DIAGNOSTIC 2673 struct cfiscsi_data_wait *cdw; 2674#endif 2675 struct cfiscsi_session *cs; 2676 uint16_t sense_length; 2677 2678 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2679 cs = PDU_SESSION(request); 2680 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2681 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2682 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2683 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2684 2685 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2686 // bhssc->bhssc_initiator_task_tag); 2687 2688#ifdef DIAGNOSTIC 2689 CFISCSI_SESSION_LOCK(cs); 2690 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2691 KASSERT(bhssc->bhssc_initiator_task_tag != 2692 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2693 CFISCSI_SESSION_UNLOCK(cs); 2694#endif 2695 2696 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2697 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2698 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2699 bhssr->bhssr_flags = 0x80; 2700 /* 2701 * XXX: We don't deal with bidirectional under/overflows; 2702 * does anything actually support those? 2703 */ 2704 if (PDU_TOTAL_TRANSFER_LEN(request) < 2705 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2706 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2707 bhssr->bhssr_residual_count = 2708 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2709 PDU_TOTAL_TRANSFER_LEN(request)); 2710 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2711 // ntohl(bhssr->bhssr_residual_count)); 2712 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2713 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2714 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2715 bhssr->bhssr_residual_count = 2716 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2717 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2718 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2719 // ntohl(bhssr->bhssr_residual_count)); 2720 } 2721 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2722 bhssr->bhssr_status = io->scsiio.scsi_status; 2723 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2724 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2725 2726 if (io->scsiio.sense_len > 0) { 2727#if 0 2728 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2729 io->scsiio.sense_len); 2730#endif 2731 sense_length = htons(io->scsiio.sense_len); 2732 icl_pdu_append_data(response, 2733 &sense_length, sizeof(sense_length), M_WAITOK); 2734 icl_pdu_append_data(response, 2735 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2736 } 2737 2738 ctl_free_io(io); 2739 icl_pdu_free(request); 2740 cfiscsi_pdu_queue(response); 2741} 2742 2743static void 2744cfiscsi_task_management_done(union ctl_io *io) 2745{ 2746 struct icl_pdu *request, *response; 2747 struct iscsi_bhs_task_management_request *bhstmr; 2748 struct iscsi_bhs_task_management_response *bhstmr2; 2749 struct cfiscsi_data_wait *cdw, *tmpcdw; 2750 struct cfiscsi_session *cs; 2751 2752 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2753 cs = PDU_SESSION(request); 2754 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2755 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2756 ISCSI_BHS_OPCODE_TASK_REQUEST, 2757 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2758 2759#if 0 2760 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2761 bhstmr->bhstmr_initiator_task_tag, 2762 bhstmr->bhstmr_referenced_task_tag); 2763#endif 2764 2765 if ((bhstmr->bhstmr_function & ~0x80) == 2766 BHSTMR_FUNCTION_ABORT_TASK) { 2767 /* 2768 * Make sure we no longer wait for Data-Out for this command. 2769 */ 2770 CFISCSI_SESSION_LOCK(cs); 2771 TAILQ_FOREACH_SAFE(cdw, 2772 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2773 if (bhstmr->bhstmr_referenced_task_tag != 2774 cdw->cdw_initiator_task_tag) 2775 continue; 2776 2777#if 0 2778 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2779 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2780#endif 2781 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2782 cdw, cdw_next); 2783 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2784 uma_zfree(cfiscsi_data_wait_zone, cdw); 2785 } 2786 CFISCSI_SESSION_UNLOCK(cs); 2787 } 2788 2789 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2790 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2791 response->ip_bhs; 2792 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2793 bhstmr2->bhstmr_flags = 0x80; 2794 if (io->io_hdr.status == CTL_SUCCESS) { 2795 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2796 } else { 2797 /* 2798 * XXX: How to figure out what exactly went wrong? iSCSI spec 2799 * expects us to provide detailed error, e.g. "Task does 2800 * not exist" or "LUN does not exist". 2801 */ 2802 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2803 bhstmr2->bhstmr_response = 2804 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2805 } 2806 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2807 2808 ctl_free_io(io); 2809 icl_pdu_free(request); 2810 cfiscsi_pdu_queue(response); 2811} 2812 2813static void 2814cfiscsi_done(union ctl_io *io) 2815{ 2816 struct icl_pdu *request; 2817 struct cfiscsi_session *cs; 2818 2819 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2820 ("invalid CTL status %#x", io->io_hdr.status)); 2821 2822 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2823 if (request == NULL) { 2824 /* 2825 * Implicit task termination has just completed; nothing to do. 2826 */ 2827 return; 2828 } 2829 2830 cs = PDU_SESSION(request); 2831 refcount_release(&cs->cs_outstanding_ctl_pdus); 2832 2833 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2834 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2835 cfiscsi_scsi_command_done(io); 2836 break; 2837 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2838 cfiscsi_task_management_done(io); 2839 break; 2840 default: 2841 panic("cfiscsi_done called with wrong opcode 0x%x", 2842 request->ip_bhs->bhs_opcode); 2843 } 2844} 2845