ctl_frontend_iscsi.c revision 268141
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 268141 2014-07-02 10:20:08Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 268141 2014-07-02 10:20:08Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capability.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include "../../dev/iscsi/icl.h" 71#include "../../dev/iscsi/iscsi_proto.h" 72#include "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 len = icl_pdu_data_segment_length(request); 741 742 /* 743 * Make sure the offset, as sent by the initiator, matches the offset 744 * we're supposed to be at in the scatter-gather list. 745 */ 746 if (buffer_offset > 747 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 748 buffer_offset + len <= 749 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 750 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 751 "expected %zd; dropping connection", buffer_offset, 752 (size_t)io->scsiio.kern_rel_offset + 753 (size_t)io->scsiio.ext_data_filled); 754 ctl_set_data_phase_error(&io->scsiio); 755 cfiscsi_session_terminate(cs); 756 return (true); 757 } 758 759 /* 760 * This is the offset within the PDU data segment, as opposed 761 * to buffer_offset, which is the offset within the task (SCSI 762 * command). 763 */ 764 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 765 buffer_offset; 766 767 /* 768 * Iterate over the scatter/gather segments, filling them with data 769 * from the PDU data segment. Note that this can get called multiple 770 * times for one SCSI command; the cdw structure holds state for the 771 * scatter/gather list. 772 */ 773 for (;;) { 774 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 775 ("cdw->cdw_sg_index >= ctl_sg_count")); 776 if (cdw->cdw_sg_len == 0) { 777 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 778 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 779 } 780 KASSERT(off <= len, ("len > off")); 781 copy_len = len - off; 782 if (copy_len > cdw->cdw_sg_len) 783 copy_len = cdw->cdw_sg_len; 784 785 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 786 cdw->cdw_sg_addr += copy_len; 787 cdw->cdw_sg_len -= copy_len; 788 off += copy_len; 789 io->scsiio.ext_data_filled += copy_len; 790 791 if (cdw->cdw_sg_len == 0) { 792 /* 793 * End of current segment. 794 */ 795 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 796 /* 797 * Last segment in scatter/gather list. 798 */ 799 break; 800 } 801 cdw->cdw_sg_index++; 802 } 803 804 if (off == len) { 805 /* 806 * End of PDU payload. 807 */ 808 break; 809 } 810 } 811 812 if (len > off) { 813 /* 814 * In case of unsolicited data, it's possible that the buffer 815 * provided by CTL is smaller than negotiated FirstBurstLength. 816 * Just ignore the superfluous data; will ask for them with R2T 817 * on next call to cfiscsi_datamove(). 818 * 819 * This obviously can only happen with SCSI Command PDU. 820 */ 821 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 822 ISCSI_BHS_OPCODE_SCSI_COMMAND) 823 return (true); 824 825 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 826 "expected %zd; dropping connection", 827 icl_pdu_data_segment_length(request), off); 828 ctl_set_data_phase_error(&io->scsiio); 829 cfiscsi_session_terminate(cs); 830 return (true); 831 } 832 833 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len && 834 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 835 CFISCSI_SESSION_WARN(cs, "got the final packet without " 836 "the F flag; flags = 0x%x; dropping connection", 837 bhsdo->bhsdo_flags); 838 ctl_set_data_phase_error(&io->scsiio); 839 cfiscsi_session_terminate(cs); 840 return (true); 841 } 842 843 if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len && 844 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 845 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 846 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 847 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 848 "transmitted size was %zd bytes instead of %d; " 849 "dropping connection", 850 (size_t)io->scsiio.ext_data_filled, 851 io->scsiio.kern_data_len); 852 ctl_set_data_phase_error(&io->scsiio); 853 cfiscsi_session_terminate(cs); 854 return (true); 855 } else { 856 /* 857 * For SCSI Command PDU, this just means we need to 858 * solicit more data by sending R2T. 859 */ 860 return (false); 861 } 862 } 863 864 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) { 865#if 0 866 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 867 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 868#endif 869 870 return (true); 871 } 872 873 return (false); 874} 875 876static void 877cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 878{ 879 struct iscsi_bhs_data_out *bhsdo; 880 struct cfiscsi_session *cs; 881 struct cfiscsi_data_wait *cdw = NULL; 882 union ctl_io *io; 883 bool done; 884 885 cs = PDU_SESSION(request); 886 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 887 888 CFISCSI_SESSION_LOCK(cs); 889 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 890#if 0 891 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 892 "ttt 0x%x, itt 0x%x", 893 bhsdo->bhsdo_target_transfer_tag, 894 bhsdo->bhsdo_initiator_task_tag, 895 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 896#endif 897 if (bhsdo->bhsdo_target_transfer_tag == 898 cdw->cdw_target_transfer_tag) 899 break; 900 } 901 CFISCSI_SESSION_UNLOCK(cs); 902 if (cdw == NULL) { 903 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 904 "0x%x, not found; dropping connection", 905 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 906 icl_pdu_free(request); 907 cfiscsi_session_terminate(cs); 908 return; 909 } 910 911 io = cdw->cdw_ctl_io; 912 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 913 ("CTL_FLAG_DATA_IN")); 914 915 done = cfiscsi_handle_data_segment(request, cdw); 916 if (done) { 917 CFISCSI_SESSION_LOCK(cs); 918 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 919 CFISCSI_SESSION_UNLOCK(cs); 920 uma_zfree(cfiscsi_data_wait_zone, cdw); 921 io->scsiio.be_move_done(io); 922 } 923 924 icl_pdu_free(request); 925} 926 927static void 928cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 929{ 930 struct iscsi_bhs_logout_request *bhslr; 931 struct iscsi_bhs_logout_response *bhslr2; 932 struct icl_pdu *response; 933 struct cfiscsi_session *cs; 934 935 cs = PDU_SESSION(request); 936 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 937 switch (bhslr->bhslr_reason & 0x7f) { 938 case BHSLR_REASON_CLOSE_SESSION: 939 case BHSLR_REASON_CLOSE_CONNECTION: 940 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 941 if (response == NULL) { 942 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 943 icl_pdu_free(request); 944 cfiscsi_session_terminate(cs); 945 return; 946 } 947 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 948 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 949 bhslr2->bhslr_flags = 0x80; 950 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 951 bhslr2->bhslr_initiator_task_tag = 952 bhslr->bhslr_initiator_task_tag; 953 icl_pdu_free(request); 954 cfiscsi_pdu_queue(response); 955 cfiscsi_session_terminate(cs); 956 break; 957 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 958 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 959 if (response == NULL) { 960 CFISCSI_SESSION_WARN(cs, 961 "failed to allocate memory; dropping connection"); 962 icl_pdu_free(request); 963 cfiscsi_session_terminate(cs); 964 return; 965 } 966 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 967 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 968 bhslr2->bhslr_flags = 0x80; 969 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 970 bhslr2->bhslr_initiator_task_tag = 971 bhslr->bhslr_initiator_task_tag; 972 icl_pdu_free(request); 973 cfiscsi_pdu_queue(response); 974 break; 975 default: 976 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 977 bhslr->bhslr_reason); 978 icl_pdu_free(request); 979 cfiscsi_session_terminate(cs); 980 break; 981 } 982} 983 984static void 985cfiscsi_callout(void *context) 986{ 987 struct icl_pdu *cp; 988 struct iscsi_bhs_nop_in *bhsni; 989 struct cfiscsi_session *cs; 990 991 cs = context; 992 993 if (cs->cs_terminating) 994 return; 995 996 callout_schedule(&cs->cs_callout, 1 * hz); 997 998 atomic_add_int(&cs->cs_timeout, 1); 999 1000#ifdef ICL_KERNEL_PROXY 1001 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1002 if (cs->cs_timeout > login_timeout) { 1003 CFISCSI_SESSION_WARN(cs, "login timed out after " 1004 "%d seconds; dropping connection", cs->cs_timeout); 1005 cfiscsi_session_terminate(cs); 1006 } 1007 return; 1008 } 1009#endif 1010 1011 if (cs->cs_timeout >= ping_timeout) { 1012 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1013 "dropping connection", ping_timeout); 1014 cfiscsi_session_terminate(cs); 1015 return; 1016 } 1017 1018 /* 1019 * If the ping was reset less than one second ago - which means 1020 * that we've received some PDU during the last second - assume 1021 * the traffic flows correctly and don't bother sending a NOP-Out. 1022 * 1023 * (It's 2 - one for one second, and one for incrementing is_timeout 1024 * earlier in this routine.) 1025 */ 1026 if (cs->cs_timeout < 2) 1027 return; 1028 1029 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1030 if (cp == NULL) { 1031 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1032 return; 1033 } 1034 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1035 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1036 bhsni->bhsni_flags = 0x80; 1037 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1038 1039 cfiscsi_pdu_queue(cp); 1040} 1041 1042static void 1043cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1044{ 1045 struct cfiscsi_data_wait *cdw, *tmpcdw; 1046 union ctl_io *io; 1047 int error; 1048 1049#ifdef notyet 1050 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1051 if (io == NULL) { 1052 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1053 return; 1054 } 1055 ctl_zero_io(io); 1056 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1057 io->io_hdr.io_type = CTL_IO_TASK; 1058 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1059 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1060 io->io_hdr.nexus.targ_target.id = 0; 1061 io->io_hdr.nexus.targ_lun = lun; 1062 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1063 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1064 error = ctl_queue(io); 1065 if (error != CTL_RETVAL_COMPLETE) { 1066 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1067 ctl_free_io(io); 1068 } 1069#else 1070 /* 1071 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1072 * just iterate over tasks that are waiting for something - data - and 1073 * terminate those. 1074 */ 1075 CFISCSI_SESSION_LOCK(cs); 1076 TAILQ_FOREACH_SAFE(cdw, 1077 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1078 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1079 if (io == NULL) { 1080 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1081 return; 1082 } 1083 ctl_zero_io(io); 1084 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1085 io->io_hdr.io_type = CTL_IO_TASK; 1086 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1087 io->io_hdr.nexus.targ_port = 1088 cs->cs_target->ct_softc->fe.targ_port; 1089 io->io_hdr.nexus.targ_target.id = 0; 1090 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1091 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1092 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1093 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1094 error = ctl_queue(io); 1095 if (error != CTL_RETVAL_COMPLETE) { 1096 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1097 ctl_free_io(io); 1098 return; 1099 } 1100#if 0 1101 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1102 "0x%x", cdw->cdw_initiator_task_tag); 1103#endif 1104 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1105 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1106 uma_zfree(cfiscsi_data_wait_zone, cdw); 1107 } 1108 CFISCSI_SESSION_UNLOCK(cs); 1109#endif 1110} 1111 1112static void 1113cfiscsi_maintenance_thread(void *arg) 1114{ 1115 struct cfiscsi_session *cs; 1116 1117 cs = arg; 1118 1119 for (;;) { 1120 CFISCSI_SESSION_LOCK(cs); 1121 if (cs->cs_terminating == false) 1122 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1123 CFISCSI_SESSION_UNLOCK(cs); 1124 1125 if (cs->cs_terminating) { 1126 cfiscsi_session_terminate_tasks(cs); 1127 callout_drain(&cs->cs_callout); 1128 1129 icl_conn_shutdown(cs->cs_conn); 1130 icl_conn_close(cs->cs_conn); 1131 1132 cs->cs_terminating++; 1133 1134 /* 1135 * XXX: We used to wait up to 30 seconds to deliver queued PDUs 1136 * to the initiator. We also tried hard to deliver SCSI Responses 1137 * for the aborted PDUs. We don't do that anymore. We might need 1138 * to revisit that. 1139 */ 1140 1141 cfiscsi_session_delete(cs); 1142 kthread_exit(); 1143 return; 1144 } 1145 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1146 } 1147} 1148 1149static void 1150cfiscsi_session_terminate(struct cfiscsi_session *cs) 1151{ 1152 1153 if (cs->cs_terminating != 0) 1154 return; 1155 cs->cs_terminating = 1; 1156 cv_signal(&cs->cs_maintenance_cv); 1157#ifdef ICL_KERNEL_PROXY 1158 cv_signal(&cs->cs_login_cv); 1159#endif 1160} 1161 1162static int 1163cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1164{ 1165 int error, i; 1166 struct cfiscsi_softc *softc; 1167 1168 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1169 1170 softc = &cfiscsi_softc; 1171 1172 mtx_lock(&softc->lock); 1173 for (i = 0; i < softc->max_initiators; i++) { 1174 if (softc->ctl_initids[i] == 0) 1175 break; 1176 } 1177 if (i == softc->max_initiators) { 1178 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1179 softc->max_initiators); 1180 mtx_unlock(&softc->lock); 1181 return (1); 1182 } 1183 softc->ctl_initids[i] = 1; 1184 mtx_unlock(&softc->lock); 1185 1186#if 0 1187 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1188 i, softc->max_initiators); 1189#endif 1190 cs->cs_ctl_initid = i; 1191 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1192 if (error != 0) { 1193 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1194 mtx_lock(&softc->lock); 1195 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1196 mtx_unlock(&softc->lock); 1197 cs->cs_ctl_initid = -1; 1198 return (1); 1199 } 1200 1201 return (0); 1202} 1203 1204static void 1205cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1206{ 1207 int error; 1208 struct cfiscsi_softc *softc; 1209 1210 if (cs->cs_ctl_initid == -1) 1211 return; 1212 1213 softc = &cfiscsi_softc; 1214 1215 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1216 if (error != 0) { 1217 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1218 error); 1219 } 1220 mtx_lock(&softc->lock); 1221 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1222 mtx_unlock(&softc->lock); 1223 cs->cs_ctl_initid = -1; 1224} 1225 1226static struct cfiscsi_session * 1227cfiscsi_session_new(struct cfiscsi_softc *softc) 1228{ 1229 struct cfiscsi_session *cs; 1230 int error; 1231 1232 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1233 if (cs == NULL) { 1234 CFISCSI_WARN("malloc failed"); 1235 return (NULL); 1236 } 1237 cs->cs_ctl_initid = -1; 1238 1239 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1240 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1241 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1242 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1243#ifdef ICL_KERNEL_PROXY 1244 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1245#endif 1246 1247 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1248 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1249 cs->cs_conn->ic_error = cfiscsi_error_callback; 1250 cs->cs_conn->ic_prv0 = cs; 1251 1252 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1253 if (error != 0) { 1254 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1255 free(cs, M_CFISCSI); 1256 return (NULL); 1257 } 1258 1259 mtx_lock(&softc->lock); 1260 cs->cs_id = softc->last_session_id + 1; 1261 softc->last_session_id++; 1262 mtx_unlock(&softc->lock); 1263 1264 mtx_lock(&softc->lock); 1265 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1266 mtx_unlock(&softc->lock); 1267 1268 /* 1269 * Start pinging the initiator. 1270 */ 1271 callout_init(&cs->cs_callout, 1); 1272 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1273 1274 return (cs); 1275} 1276 1277static void 1278cfiscsi_session_delete(struct cfiscsi_session *cs) 1279{ 1280 struct cfiscsi_softc *softc; 1281 1282 softc = &cfiscsi_softc; 1283 1284 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1285 ("destroying session with outstanding CTL pdus")); 1286 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1287 ("destroying session with non-empty queue")); 1288 1289 cfiscsi_session_unregister_initiator(cs); 1290 if (cs->cs_target != NULL) 1291 cfiscsi_target_release(cs->cs_target); 1292 icl_conn_close(cs->cs_conn); 1293 icl_conn_free(cs->cs_conn); 1294 1295 mtx_lock(&softc->lock); 1296 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1297 mtx_unlock(&softc->lock); 1298 1299 free(cs, M_CFISCSI); 1300} 1301 1302int 1303cfiscsi_init(void) 1304{ 1305 struct cfiscsi_softc *softc; 1306 struct ctl_frontend *fe; 1307 int retval; 1308 1309 softc = &cfiscsi_softc; 1310 retval = 0; 1311 bzero(softc, sizeof(*softc)); 1312 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1313 1314#ifdef ICL_KERNEL_PROXY 1315 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1316#endif 1317 TAILQ_INIT(&softc->sessions); 1318 TAILQ_INIT(&softc->targets); 1319 1320 fe = &softc->fe; 1321 fe->port_type = CTL_PORT_ISCSI; 1322 /* XXX KDM what should the real number be here? */ 1323 fe->num_requested_ctl_io = 4096; 1324 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1325 fe->port_name = softc->port_name; 1326 fe->port_online = cfiscsi_online; 1327 fe->port_offline = cfiscsi_offline; 1328 fe->onoff_arg = softc; 1329 fe->targ_enable = cfiscsi_targ_enable; 1330 fe->targ_disable = cfiscsi_targ_disable; 1331 fe->lun_enable = cfiscsi_lun_enable; 1332 fe->lun_disable = cfiscsi_lun_disable; 1333 fe->targ_lun_arg = softc; 1334 fe->ioctl = cfiscsi_ioctl; 1335 fe->devid = cfiscsi_devid; 1336 fe->fe_datamove = cfiscsi_datamove; 1337 fe->fe_done = cfiscsi_done; 1338 1339 /* XXX KDM what should we report here? */ 1340 /* XXX These should probably be fetched from CTL. */ 1341 fe->max_targets = 1; 1342 fe->max_target_id = 15; 1343 1344 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1345 if (retval != 0) { 1346 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1347 retval); 1348 retval = 1; 1349 goto bailout; 1350 } 1351 1352 softc->max_initiators = fe->max_initiators; 1353 1354 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1355 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1356 UMA_ALIGN_PTR, 0); 1357 1358 return (0); 1359 1360bailout: 1361 return (retval); 1362} 1363 1364static int 1365cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1366{ 1367 1368 switch (what) { 1369 case MOD_LOAD: 1370 return (cfiscsi_init()); 1371 case MOD_UNLOAD: 1372 return (EBUSY); 1373 default: 1374 return (EOPNOTSUPP); 1375 } 1376} 1377 1378#ifdef ICL_KERNEL_PROXY 1379static void 1380cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1381{ 1382 struct cfiscsi_session *cs; 1383 1384 cs = cfiscsi_session_new(&cfiscsi_softc); 1385 if (cs == NULL) { 1386 CFISCSI_WARN("failed to create session"); 1387 return; 1388 } 1389 1390 icl_conn_handoff_sock(cs->cs_conn, so); 1391 cs->cs_initiator_sa = sa; 1392 cs->cs_portal_id = portal_id; 1393 cs->cs_waiting_for_ctld = true; 1394 cv_signal(&cfiscsi_softc.accept_cv); 1395} 1396#endif 1397 1398static void 1399cfiscsi_online(void *arg) 1400{ 1401 struct cfiscsi_softc *softc; 1402 1403 softc = (struct cfiscsi_softc *)arg; 1404 1405 softc->online = 1; 1406#ifdef ICL_KERNEL_PROXY 1407 if (softc->listener != NULL) 1408 icl_listen_free(softc->listener); 1409 softc->listener = icl_listen_new(cfiscsi_accept); 1410#endif 1411} 1412 1413static void 1414cfiscsi_offline(void *arg) 1415{ 1416 struct cfiscsi_softc *softc; 1417 struct cfiscsi_session *cs; 1418 1419 softc = (struct cfiscsi_softc *)arg; 1420 1421 softc->online = 0; 1422 1423 mtx_lock(&softc->lock); 1424 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1425 cfiscsi_session_terminate(cs); 1426 mtx_unlock(&softc->lock); 1427 1428#ifdef ICL_KERNEL_PROXY 1429 icl_listen_free(softc->listener); 1430 softc->listener = NULL; 1431#endif 1432} 1433 1434static int 1435cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1436{ 1437 1438 return (0); 1439} 1440 1441static int 1442cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1443{ 1444 1445 return (0); 1446} 1447 1448static void 1449cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1450{ 1451 struct cfiscsi_softc *softc; 1452 struct cfiscsi_session *cs; 1453 struct cfiscsi_target *ct; 1454 struct ctl_iscsi_handoff_params *cihp; 1455 int error; 1456 1457 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1458 softc = &cfiscsi_softc; 1459 1460 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1461 cihp->initiator_name, cihp->initiator_addr, 1462 cihp->target_name); 1463 1464 if (softc->online == 0) { 1465 ci->status = CTL_ISCSI_ERROR; 1466 snprintf(ci->error_str, sizeof(ci->error_str), 1467 "%s: port offline", __func__); 1468 return; 1469 } 1470 1471 ct = cfiscsi_target_find(softc, cihp->target_name); 1472 if (ct == NULL) { 1473 ci->status = CTL_ISCSI_ERROR; 1474 snprintf(ci->error_str, sizeof(ci->error_str), 1475 "%s: target not found", __func__); 1476 return; 1477 } 1478 1479#ifdef ICL_KERNEL_PROXY 1480 if (cihp->socket > 0 && cihp->connection_id > 0) { 1481 snprintf(ci->error_str, sizeof(ci->error_str), 1482 "both socket and connection_id set"); 1483 ci->status = CTL_ISCSI_ERROR; 1484 cfiscsi_target_release(ct); 1485 return; 1486 } 1487 if (cihp->socket == 0) { 1488 mtx_lock(&cfiscsi_softc.lock); 1489 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1490 if (cs->cs_id == cihp->socket) 1491 break; 1492 } 1493 if (cs == NULL) { 1494 mtx_unlock(&cfiscsi_softc.lock); 1495 snprintf(ci->error_str, sizeof(ci->error_str), 1496 "connection not found"); 1497 ci->status = CTL_ISCSI_ERROR; 1498 cfiscsi_target_release(ct); 1499 return; 1500 } 1501 mtx_unlock(&cfiscsi_softc.lock); 1502 } else { 1503#endif 1504 cs = cfiscsi_session_new(softc); 1505 if (cs == NULL) { 1506 ci->status = CTL_ISCSI_ERROR; 1507 snprintf(ci->error_str, sizeof(ci->error_str), 1508 "%s: cfiscsi_session_new failed", __func__); 1509 cfiscsi_target_release(ct); 1510 return; 1511 } 1512#ifdef ICL_KERNEL_PROXY 1513 } 1514#endif 1515 cs->cs_target = ct; 1516 1517 /* 1518 * First PDU of Full Feature phase has the same CmdSN as the last 1519 * PDU from the Login Phase received from the initiator. Thus, 1520 * the -1 below. 1521 */ 1522 cs->cs_portal_group_tag = cihp->portal_group_tag; 1523 cs->cs_cmdsn = cihp->cmdsn; 1524 cs->cs_statsn = cihp->statsn; 1525 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1526 cs->cs_max_burst_length = cihp->max_burst_length; 1527 cs->cs_immediate_data = !!cihp->immediate_data; 1528 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1529 cs->cs_conn->ic_header_crc32c = true; 1530 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1531 cs->cs_conn->ic_data_crc32c = true; 1532 1533 strlcpy(cs->cs_initiator_name, 1534 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1535 strlcpy(cs->cs_initiator_addr, 1536 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1537 strlcpy(cs->cs_initiator_alias, 1538 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1539 1540#ifdef ICL_KERNEL_PROXY 1541 if (cihp->socket > 0) { 1542#endif 1543 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1544 if (error != 0) { 1545 cfiscsi_session_delete(cs); 1546 ci->status = CTL_ISCSI_ERROR; 1547 snprintf(ci->error_str, sizeof(ci->error_str), 1548 "%s: icl_conn_handoff failed with error %d", 1549 __func__, error); 1550 return; 1551 } 1552#ifdef ICL_KERNEL_PROXY 1553 } 1554#endif 1555 1556 /* 1557 * Register initiator with CTL. 1558 */ 1559 cfiscsi_session_register_initiator(cs); 1560 1561#ifdef ICL_KERNEL_PROXY 1562 cs->cs_login_phase = false; 1563 1564 /* 1565 * First PDU of the Full Feature phase has likely already arrived. 1566 * We have to pick it up and execute properly. 1567 */ 1568 if (cs->cs_login_pdu != NULL) { 1569 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1570 cfiscsi_pdu_handle(cs->cs_login_pdu); 1571 cs->cs_login_pdu = NULL; 1572 } 1573#endif 1574 1575 ci->status = CTL_ISCSI_OK; 1576} 1577 1578static void 1579cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1580{ 1581 struct ctl_iscsi_list_params *cilp; 1582 struct cfiscsi_session *cs; 1583 struct cfiscsi_softc *softc; 1584 struct sbuf *sb; 1585 int error; 1586 1587 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1588 softc = &cfiscsi_softc; 1589 1590 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1591 if (sb == NULL) { 1592 ci->status = CTL_ISCSI_ERROR; 1593 snprintf(ci->error_str, sizeof(ci->error_str), 1594 "Unable to allocate %d bytes for iSCSI session list", 1595 cilp->alloc_len); 1596 return; 1597 } 1598 1599 sbuf_printf(sb, "<ctlislist>\n"); 1600 mtx_lock(&softc->lock); 1601 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1602#ifdef ICL_KERNEL_PROXY 1603 if (cs->cs_target == NULL) 1604 continue; 1605#endif 1606 error = sbuf_printf(sb, "<connection id=\"%d\">" 1607 "<initiator>%s</initiator>" 1608 "<initiator_addr>%s</initiator_addr>" 1609 "<initiator_alias>%s</initiator_alias>" 1610 "<target>%s</target>" 1611 "<target_alias>%s</target_alias>" 1612 "<header_digest>%s</header_digest>" 1613 "<data_digest>%s</data_digest>" 1614 "<max_data_segment_length>%zd</max_data_segment_length>" 1615 "<immediate_data>%d</immediate_data>" 1616 "<iser>%d</iser>" 1617 "</connection>\n", 1618 cs->cs_id, 1619 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1620 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1621 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1622 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1623 cs->cs_max_data_segment_length, 1624 cs->cs_immediate_data, 1625 cs->cs_conn->ic_iser); 1626 if (error != 0) 1627 break; 1628 } 1629 mtx_unlock(&softc->lock); 1630 error = sbuf_printf(sb, "</ctlislist>\n"); 1631 if (error != 0) { 1632 sbuf_delete(sb); 1633 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1634 snprintf(ci->error_str, sizeof(ci->error_str), 1635 "Out of space, %d bytes is too small", cilp->alloc_len); 1636 return; 1637 } 1638 sbuf_finish(sb); 1639 1640 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1641 cilp->fill_len = sbuf_len(sb) + 1; 1642 ci->status = CTL_ISCSI_OK; 1643 sbuf_delete(sb); 1644} 1645 1646static void 1647cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1648{ 1649 struct icl_pdu *response; 1650 struct iscsi_bhs_asynchronous_message *bhsam; 1651 struct ctl_iscsi_terminate_params *citp; 1652 struct cfiscsi_session *cs; 1653 struct cfiscsi_softc *softc; 1654 int found = 0; 1655 1656 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1657 softc = &cfiscsi_softc; 1658 1659 mtx_lock(&softc->lock); 1660 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1661 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1662 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1663 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1664 continue; 1665 1666 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1667 if (response == NULL) { 1668 /* 1669 * Oh well. Just terminate the connection. 1670 */ 1671 } else { 1672 bhsam = (struct iscsi_bhs_asynchronous_message *) 1673 response->ip_bhs; 1674 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1675 bhsam->bhsam_flags = 0x80; 1676 bhsam->bhsam_0xffffffff = 0xffffffff; 1677 bhsam->bhsam_async_event = 1678 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1679 cfiscsi_pdu_queue(response); 1680 } 1681 cfiscsi_session_terminate(cs); 1682 found++; 1683 } 1684 mtx_unlock(&softc->lock); 1685 1686 if (found == 0) { 1687 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1688 snprintf(ci->error_str, sizeof(ci->error_str), 1689 "No matching connections found"); 1690 return; 1691 } 1692 1693 ci->status = CTL_ISCSI_OK; 1694} 1695 1696static void 1697cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1698{ 1699 struct icl_pdu *response; 1700 struct iscsi_bhs_asynchronous_message *bhsam; 1701 struct ctl_iscsi_logout_params *cilp; 1702 struct cfiscsi_session *cs; 1703 struct cfiscsi_softc *softc; 1704 int found = 0; 1705 1706 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1707 softc = &cfiscsi_softc; 1708 1709 mtx_lock(&softc->lock); 1710 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1711 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1712 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1713 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1714 continue; 1715 1716 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1717 if (response == NULL) { 1718 ci->status = CTL_ISCSI_ERROR; 1719 snprintf(ci->error_str, sizeof(ci->error_str), 1720 "Unable to allocate memory"); 1721 mtx_unlock(&softc->lock); 1722 return; 1723 } 1724 bhsam = 1725 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1726 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1727 bhsam->bhsam_flags = 0x80; 1728 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1729 bhsam->bhsam_parameter3 = htons(10); 1730 cfiscsi_pdu_queue(response); 1731 found++; 1732 } 1733 mtx_unlock(&softc->lock); 1734 1735 if (found == 0) { 1736 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1737 snprintf(ci->error_str, sizeof(ci->error_str), 1738 "No matching connections found"); 1739 return; 1740 } 1741 1742 ci->status = CTL_ISCSI_OK; 1743} 1744 1745#ifdef ICL_KERNEL_PROXY 1746static void 1747cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1748{ 1749 struct ctl_iscsi_listen_params *cilp; 1750 struct sockaddr *sa; 1751 int error; 1752 1753 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1754 1755 if (cfiscsi_softc.listener == NULL) { 1756 CFISCSI_DEBUG("no listener"); 1757 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1758 ci->status = CTL_ISCSI_ERROR; 1759 return; 1760 } 1761 1762 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1763 if (error != 0) { 1764 CFISCSI_DEBUG("getsockaddr, error %d", error); 1765 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1766 ci->status = CTL_ISCSI_ERROR; 1767 return; 1768 } 1769 1770 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1771 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1772 if (error != 0) { 1773 free(sa, M_SONAME); 1774 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1775 snprintf(ci->error_str, sizeof(ci->error_str), 1776 "icl_listen_add failed, error %d", error); 1777 ci->status = CTL_ISCSI_ERROR; 1778 return; 1779 } 1780 1781 ci->status = CTL_ISCSI_OK; 1782} 1783 1784static void 1785cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1786{ 1787 struct ctl_iscsi_accept_params *ciap; 1788 struct cfiscsi_session *cs; 1789 int error; 1790 1791 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1792 1793 mtx_lock(&cfiscsi_softc.lock); 1794 for (;;) { 1795 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1796 if (cs->cs_waiting_for_ctld) 1797 break; 1798 } 1799 if (cs != NULL) 1800 break; 1801 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1802 if (error != 0) { 1803 mtx_unlock(&cfiscsi_softc.lock); 1804 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1805 ci->status = CTL_ISCSI_ERROR; 1806 return; 1807 } 1808 } 1809 mtx_unlock(&cfiscsi_softc.lock); 1810 1811 cs->cs_waiting_for_ctld = false; 1812 cs->cs_login_phase = true; 1813 1814 ciap->connection_id = cs->cs_id; 1815 ciap->portal_id = cs->cs_portal_id; 1816 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1817 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1818 cs->cs_initiator_sa->sa_len); 1819 if (error != 0) { 1820 snprintf(ci->error_str, sizeof(ci->error_str), 1821 "copyout failed with error %d", error); 1822 ci->status = CTL_ISCSI_ERROR; 1823 return; 1824 } 1825 1826 ci->status = CTL_ISCSI_OK; 1827} 1828 1829static void 1830cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1831{ 1832 struct ctl_iscsi_send_params *cisp; 1833 struct cfiscsi_session *cs; 1834 struct icl_pdu *ip; 1835 size_t datalen; 1836 void *data; 1837 int error; 1838 1839 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1840 1841 mtx_lock(&cfiscsi_softc.lock); 1842 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1843 if (cs->cs_id == cisp->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 (cs->cs_login_phase == false) 1856 return (EBUSY); 1857#endif 1858 1859 if (cs->cs_terminating) { 1860 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1861 ci->status = CTL_ISCSI_ERROR; 1862 return; 1863 } 1864 1865 datalen = cisp->data_segment_len; 1866 /* 1867 * XXX 1868 */ 1869 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1870 if (datalen > 65535) { 1871 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1872 ci->status = CTL_ISCSI_ERROR; 1873 return; 1874 } 1875 if (datalen > 0) { 1876 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1877 error = copyin(cisp->data_segment, data, datalen); 1878 if (error != 0) { 1879 free(data, M_CFISCSI); 1880 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1881 ci->status = CTL_ISCSI_ERROR; 1882 return; 1883 } 1884 } 1885 1886 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1887 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1888 if (datalen > 0) { 1889 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1890 free(data, M_CFISCSI); 1891 } 1892 CFISCSI_SESSION_LOCK(cs); 1893 icl_pdu_queue(ip); 1894 CFISCSI_SESSION_UNLOCK(cs); 1895 ci->status = CTL_ISCSI_OK; 1896} 1897 1898static void 1899cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1900{ 1901 struct ctl_iscsi_receive_params *cirp; 1902 struct cfiscsi_session *cs; 1903 struct icl_pdu *ip; 1904 void *data; 1905 int error; 1906 1907 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1908 1909 mtx_lock(&cfiscsi_softc.lock); 1910 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1911 if (cs->cs_id == cirp->connection_id) 1912 break; 1913 } 1914 if (cs == NULL) { 1915 mtx_unlock(&cfiscsi_softc.lock); 1916 snprintf(ci->error_str, sizeof(ci->error_str), 1917 "connection not found"); 1918 ci->status = CTL_ISCSI_ERROR; 1919 return; 1920 } 1921 mtx_unlock(&cfiscsi_softc.lock); 1922 1923#if 0 1924 if (is->is_login_phase == false) 1925 return (EBUSY); 1926#endif 1927 1928 CFISCSI_SESSION_LOCK(cs); 1929 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1930 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1931 if (error != 0) { 1932 CFISCSI_SESSION_UNLOCK(cs); 1933 snprintf(ci->error_str, sizeof(ci->error_str), 1934 "interrupted by signal"); 1935 ci->status = CTL_ISCSI_ERROR; 1936 return; 1937 } 1938 } 1939 1940 if (cs->cs_terminating) { 1941 CFISCSI_SESSION_UNLOCK(cs); 1942 snprintf(ci->error_str, sizeof(ci->error_str), 1943 "connection terminating"); 1944 ci->status = CTL_ISCSI_ERROR; 1945 return; 1946 } 1947 ip = cs->cs_login_pdu; 1948 cs->cs_login_pdu = NULL; 1949 CFISCSI_SESSION_UNLOCK(cs); 1950 1951 if (ip->ip_data_len > cirp->data_segment_len) { 1952 icl_pdu_free(ip); 1953 snprintf(ci->error_str, sizeof(ci->error_str), 1954 "data segment too big"); 1955 ci->status = CTL_ISCSI_ERROR; 1956 return; 1957 } 1958 1959 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1960 if (ip->ip_data_len > 0) { 1961 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1962 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1963 copyout(data, cirp->data_segment, ip->ip_data_len); 1964 free(data, M_CFISCSI); 1965 } 1966 1967 icl_pdu_free(ip); 1968 ci->status = CTL_ISCSI_OK; 1969} 1970 1971#endif /* !ICL_KERNEL_PROXY */ 1972 1973static int 1974cfiscsi_ioctl(struct cdev *dev, 1975 u_long cmd, caddr_t addr, int flag, struct thread *td) 1976{ 1977 struct ctl_iscsi *ci; 1978 1979 if (cmd != CTL_ISCSI) 1980 return (ENOTTY); 1981 1982 ci = (struct ctl_iscsi *)addr; 1983 switch (ci->type) { 1984 case CTL_ISCSI_HANDOFF: 1985 cfiscsi_ioctl_handoff(ci); 1986 break; 1987 case CTL_ISCSI_LIST: 1988 cfiscsi_ioctl_list(ci); 1989 break; 1990 case CTL_ISCSI_TERMINATE: 1991 cfiscsi_ioctl_terminate(ci); 1992 break; 1993 case CTL_ISCSI_LOGOUT: 1994 cfiscsi_ioctl_logout(ci); 1995 break; 1996#ifdef ICL_KERNEL_PROXY 1997 case CTL_ISCSI_LISTEN: 1998 cfiscsi_ioctl_listen(ci); 1999 break; 2000 case CTL_ISCSI_ACCEPT: 2001 cfiscsi_ioctl_accept(ci); 2002 break; 2003 case CTL_ISCSI_SEND: 2004 cfiscsi_ioctl_send(ci); 2005 break; 2006 case CTL_ISCSI_RECEIVE: 2007 cfiscsi_ioctl_receive(ci); 2008 break; 2009#else 2010 case CTL_ISCSI_LISTEN: 2011 case CTL_ISCSI_ACCEPT: 2012 case CTL_ISCSI_SEND: 2013 case CTL_ISCSI_RECEIVE: 2014 ci->status = CTL_ISCSI_ERROR; 2015 snprintf(ci->error_str, sizeof(ci->error_str), 2016 "%s: CTL compiled without ICL_KERNEL_PROXY", 2017 __func__); 2018 break; 2019#endif /* !ICL_KERNEL_PROXY */ 2020 default: 2021 ci->status = CTL_ISCSI_ERROR; 2022 snprintf(ci->error_str, sizeof(ci->error_str), 2023 "%s: invalid iSCSI request type %d", __func__, ci->type); 2024 break; 2025 } 2026 2027 return (0); 2028} 2029 2030static int 2031cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 2032{ 2033 struct cfiscsi_session *cs; 2034 struct scsi_vpd_device_id *devid_ptr; 2035 struct scsi_vpd_id_descriptor *desc, *desc1; 2036 struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */ 2037 struct scsi_vpd_id_t10 *t10id; 2038 struct ctl_lun *lun; 2039 const struct icl_pdu *request; 2040 size_t devid_len, wwpn_len; 2041 2042 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 2043 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2044 cs = PDU_SESSION(request); 2045 2046 wwpn_len = strlen(cs->cs_target->ct_name); 2047 wwpn_len += strlen(",t,0x01"); 2048 wwpn_len += 1; /* '\0' */ 2049 if ((wwpn_len % 4) != 0) 2050 wwpn_len += (4 - (wwpn_len % 4)); 2051 2052 devid_len = sizeof(struct scsi_vpd_device_id) + 2053 sizeof(struct scsi_vpd_id_descriptor) + 2054 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 2055 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 2056 sizeof(struct scsi_vpd_id_descriptor) + 2057 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 2058 sizeof(struct scsi_vpd_id_descriptor) + 2059 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 2060 2061 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 2062 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 2063 ctsio->kern_sg_entries = 0; 2064 2065 if (devid_len < alloc_len) { 2066 ctsio->residual = alloc_len - devid_len; 2067 ctsio->kern_data_len = devid_len; 2068 ctsio->kern_total_len = devid_len; 2069 } else { 2070 ctsio->residual = 0; 2071 ctsio->kern_data_len = alloc_len; 2072 ctsio->kern_total_len = alloc_len; 2073 } 2074 ctsio->kern_data_resid = 0; 2075 ctsio->kern_rel_offset = 0; 2076 ctsio->kern_sg_entries = 0; 2077 2078 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2079 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2080 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2081 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 2082 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2083 wwpn_len); 2084 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2085 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2086 2087 if (lun != NULL) 2088 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2089 lun->be_lun->lun_type; 2090 else 2091 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2092 2093 devid_ptr->page_code = SVPD_DEVICE_ID; 2094 2095 scsi_ulto2b(devid_len - 4, devid_ptr->length); 2096 2097 /* 2098 * We're using a LUN association here. i.e., this device ID is a 2099 * per-LUN identifier. 2100 */ 2101 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2102 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2103 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 2104 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2105 2106 /* 2107 * If we've actually got a backend, copy the device id from the 2108 * per-LUN data. Otherwise, set it to all spaces. 2109 */ 2110 if (lun != NULL) { 2111 /* 2112 * Copy the backend's LUN ID. 2113 */ 2114 strncpy((char *)t10id->vendor_spec_id, 2115 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2116 } else { 2117 /* 2118 * No backend, set this to spaces. 2119 */ 2120 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2121 } 2122 2123 /* 2124 * desc1 is for the WWPN which is a port asscociation. 2125 */ 2126 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2127 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2128 SVPD_ID_TYPE_SCSI_NAME; 2129 desc1->length = wwpn_len; 2130 snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x", 2131 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2132 2133 /* 2134 * desc2 is for the Relative Target Port(type 4h) identifier 2135 */ 2136 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2137 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2138 SVPD_ID_TYPE_RELTARG; 2139 desc2->length = 4; 2140 desc2->identifier[3] = 1; 2141 2142 /* 2143 * desc3 is for the Target Port Group(type 5h) identifier 2144 */ 2145 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2146 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2147 SVPD_ID_TYPE_TPORTGRP; 2148 desc3->length = 4; 2149 desc3->identifier[3] = 1; 2150 2151 ctsio->scsi_status = SCSI_STATUS_OK; 2152 2153 ctsio->be_move_done = ctl_config_move_done; 2154 ctl_datamove((union ctl_io *)ctsio); 2155 2156 return (CTL_RETVAL_COMPLETE); 2157} 2158 2159static void 2160cfiscsi_target_hold(struct cfiscsi_target *ct) 2161{ 2162 2163 refcount_acquire(&ct->ct_refcount); 2164} 2165 2166static void 2167cfiscsi_target_release(struct cfiscsi_target *ct) 2168{ 2169 struct cfiscsi_softc *softc; 2170 2171 softc = ct->ct_softc; 2172 mtx_lock(&softc->lock); 2173 if (refcount_release(&ct->ct_refcount)) { 2174 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2175 mtx_unlock(&softc->lock); 2176 free(ct, M_CFISCSI); 2177 2178 return; 2179 } 2180 mtx_unlock(&softc->lock); 2181} 2182 2183static struct cfiscsi_target * 2184cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2185{ 2186 struct cfiscsi_target *ct; 2187 2188 mtx_lock(&softc->lock); 2189 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2190 if (strcmp(name, ct->ct_name) != 0) 2191 continue; 2192 cfiscsi_target_hold(ct); 2193 mtx_unlock(&softc->lock); 2194 return (ct); 2195 } 2196 mtx_unlock(&softc->lock); 2197 2198 return (NULL); 2199} 2200 2201static struct cfiscsi_target * 2202cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2203 const char *alias) 2204{ 2205 struct cfiscsi_target *ct, *newct; 2206 int i; 2207 2208 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2209 return (NULL); 2210 2211 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2212 2213 mtx_lock(&softc->lock); 2214 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2215 if (strcmp(name, ct->ct_name) != 0) 2216 continue; 2217 cfiscsi_target_hold(ct); 2218 mtx_unlock(&softc->lock); 2219 free(newct, M_CFISCSI); 2220 return (ct); 2221 } 2222 2223 for (i = 0; i < CTL_MAX_LUNS; i++) 2224 newct->ct_luns[i] = -1; 2225 2226 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2227 if (alias != NULL) 2228 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2229 refcount_init(&newct->ct_refcount, 1); 2230 newct->ct_softc = softc; 2231 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2232 mtx_unlock(&softc->lock); 2233 2234 return (newct); 2235} 2236 2237/* 2238 * Takes LUN from the target space and returns LUN from the CTL space. 2239 */ 2240static uint32_t 2241cfiscsi_map_lun(void *arg, uint32_t lun) 2242{ 2243 struct cfiscsi_session *cs; 2244 2245 cs = arg; 2246 2247 if (lun >= CTL_MAX_LUNS) { 2248 CFISCSI_DEBUG("requested lun number %d is higher " 2249 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2250 return (0xffffffff); 2251 } 2252 2253 if (cs->cs_target->ct_luns[lun] < 0) 2254 return (0xffffffff); 2255 2256 return (cs->cs_target->ct_luns[lun]); 2257} 2258 2259static int 2260cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2261 unsigned long lun_id, unsigned long ctl_lun_id) 2262{ 2263 2264 if (lun_id >= CTL_MAX_LUNS) { 2265 CFISCSI_WARN("requested lun number %ld is higher " 2266 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2267 return (-1); 2268 } 2269 2270 if (ct->ct_luns[lun_id] >= 0) { 2271 /* 2272 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2273 * when the LUN is created, and a second time just before 2274 * the port is brought online; don't emit warnings 2275 * for that case. 2276 */ 2277 if (ct->ct_luns[lun_id] == ctl_lun_id) 2278 return (0); 2279 CFISCSI_WARN("lun %ld already allocated", lun_id); 2280 return (-1); 2281 } 2282 2283#if 0 2284 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2285 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2286#endif 2287 2288 ct->ct_luns[lun_id] = ctl_lun_id; 2289 cfiscsi_target_hold(ct); 2290 2291 return (0); 2292} 2293 2294static int 2295cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2296{ 2297 2298 if (ct->ct_luns[lun_id] < 0) { 2299 CFISCSI_WARN("lun %ld not allocated", lun_id); 2300 return (-1); 2301 } 2302 2303 ct->ct_luns[lun_id] = -1; 2304 cfiscsi_target_release(ct); 2305 2306 return (0); 2307} 2308 2309static int 2310cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2311{ 2312 struct cfiscsi_softc *softc; 2313 struct cfiscsi_target *ct; 2314 struct ctl_be_lun_option *opt; 2315 const char *target = NULL, *target_alias = NULL; 2316 const char *lun = NULL; 2317 unsigned long tmp; 2318 2319 softc = (struct cfiscsi_softc *)arg; 2320 2321 STAILQ_FOREACH(opt, 2322 &control_softc->ctl_luns[lun_id]->be_lun->options, links) { 2323 if (strcmp(opt->name, "cfiscsi_target") == 0) 2324 target = opt->value; 2325 else if (strcmp(opt->name, "cfiscsi_target_alias") == 0) 2326 target_alias = opt->value; 2327 else if (strcmp(opt->name, "cfiscsi_lun") == 0) 2328 lun = opt->value; 2329 } 2330 2331 if (target == NULL && lun == NULL) 2332 return (0); 2333 2334 if (target == NULL || lun == NULL) { 2335 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2336 "cfiscsi_lun, or the other way around; ignoring"); 2337 return (0); 2338 } 2339 2340 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2341 if (ct == NULL) { 2342 CFISCSI_WARN("failed to create target \"%s\"", target); 2343 return (0); 2344 } 2345 2346 tmp = strtoul(lun, NULL, 10); 2347 cfiscsi_target_set_lun(ct, tmp, lun_id); 2348 cfiscsi_target_release(ct); 2349 return (0); 2350} 2351 2352static int 2353cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2354{ 2355 struct cfiscsi_softc *softc; 2356 struct cfiscsi_target *ct; 2357 int i; 2358 2359 softc = (struct cfiscsi_softc *)arg; 2360 2361 mtx_lock(&softc->lock); 2362 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2363 for (i = 0; i < CTL_MAX_LUNS; i++) { 2364 if (ct->ct_luns[i] < 0) 2365 continue; 2366 if (ct->ct_luns[i] != lun_id) 2367 continue; 2368 mtx_unlock(&softc->lock); 2369 cfiscsi_target_unset_lun(ct, i); 2370 return (0); 2371 } 2372 } 2373 mtx_unlock(&softc->lock); 2374 return (0); 2375} 2376 2377static void 2378cfiscsi_datamove_in(union ctl_io *io) 2379{ 2380 struct cfiscsi_session *cs; 2381 struct icl_pdu *request, *response; 2382 const struct iscsi_bhs_scsi_command *bhssc; 2383 struct iscsi_bhs_data_in *bhsdi; 2384 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2385 size_t len, expected_len, sg_len, buffer_offset; 2386 const char *sg_addr; 2387 int ctl_sg_count, error, i; 2388 2389 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2390 cs = PDU_SESSION(request); 2391 2392 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2393 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2394 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2395 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2396 2397 if (io->scsiio.kern_sg_entries > 0) { 2398 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2399 ctl_sg_count = io->scsiio.kern_sg_entries; 2400 } else { 2401 ctl_sglist = &ctl_sg_entry; 2402 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2403 ctl_sglist->len = io->scsiio.kern_data_len; 2404 ctl_sg_count = 1; 2405 } 2406 2407 /* 2408 * This is the total amount of data to be transferred within the current 2409 * SCSI command. We need to record it so that we can properly report 2410 * underflow/underflow. 2411 */ 2412 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2413 2414 /* 2415 * This is the offset within the current SCSI command; for the first 2416 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2417 * it will be the sum of lengths of previous ones. 2418 */ 2419 buffer_offset = io->scsiio.kern_rel_offset; 2420 2421 /* 2422 * This is the transfer length expected by the initiator. In theory, 2423 * it could be different from the correct amount of data from the SCSI 2424 * point of view, even if that doesn't make any sense. 2425 */ 2426 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2427#if 0 2428 if (expected_len != io->scsiio.kern_total_len) { 2429 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2430 "actual length %zd", expected_len, 2431 (size_t)io->scsiio.kern_total_len); 2432 } 2433#endif 2434 2435 if (buffer_offset >= expected_len) { 2436#if 0 2437 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2438 "already sent the expected len", buffer_offset); 2439#endif 2440 io->scsiio.be_move_done(io); 2441 return; 2442 } 2443 2444 i = 0; 2445 sg_addr = NULL; 2446 sg_len = 0; 2447 response = NULL; 2448 bhsdi = NULL; 2449 for (;;) { 2450 if (response == NULL) { 2451 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2452 if (response == NULL) { 2453 CFISCSI_SESSION_WARN(cs, "failed to " 2454 "allocate memory; dropping connection"); 2455 ctl_set_busy(&io->scsiio); 2456 io->scsiio.be_move_done(io); 2457 cfiscsi_session_terminate(cs); 2458 return; 2459 } 2460 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2461 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2462 bhsdi->bhsdi_initiator_task_tag = 2463 bhssc->bhssc_initiator_task_tag; 2464 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2465 PDU_EXPDATASN(request)++; 2466 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2467 } 2468 2469 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2470 if (sg_len == 0) { 2471 sg_addr = ctl_sglist[i].addr; 2472 sg_len = ctl_sglist[i].len; 2473 KASSERT(sg_len > 0, ("sg_len <= 0")); 2474 } 2475 2476 len = sg_len; 2477 2478 /* 2479 * Truncate to maximum data segment length. 2480 */ 2481 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2482 ("ip_data_len %zd >= max_data_segment_length %zd", 2483 response->ip_data_len, cs->cs_max_data_segment_length)); 2484 if (response->ip_data_len + len > 2485 cs->cs_max_data_segment_length) { 2486 len = cs->cs_max_data_segment_length - 2487 response->ip_data_len; 2488 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2489 len, sg_len)); 2490 } 2491 2492 /* 2493 * Truncate to expected data transfer length. 2494 */ 2495 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2496 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2497 buffer_offset, response->ip_data_len, expected_len)); 2498 if (buffer_offset + response->ip_data_len + len > expected_len) { 2499 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2500 "to expected data transfer length %zd", 2501 buffer_offset + response->ip_data_len + len, expected_len); 2502 len = expected_len - (buffer_offset + response->ip_data_len); 2503 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2504 len, sg_len)); 2505 } 2506 2507 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2508 if (error != 0) { 2509 CFISCSI_SESSION_WARN(cs, "failed to " 2510 "allocate memory; dropping connection"); 2511 icl_pdu_free(response); 2512 ctl_set_busy(&io->scsiio); 2513 io->scsiio.be_move_done(io); 2514 cfiscsi_session_terminate(cs); 2515 return; 2516 } 2517 sg_addr += len; 2518 sg_len -= len; 2519 2520 KASSERT(buffer_offset + request->ip_data_len <= expected_len, 2521 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2522 buffer_offset, request->ip_data_len, expected_len)); 2523 if (buffer_offset + request->ip_data_len == expected_len) { 2524 /* 2525 * Already have the amount of data the initiator wanted. 2526 */ 2527 break; 2528 } 2529 2530 if (sg_len == 0) { 2531 /* 2532 * End of scatter-gather segment; 2533 * proceed to the next one... 2534 */ 2535 if (i == ctl_sg_count - 1) { 2536 /* 2537 * ... unless this was the last one. 2538 */ 2539 break; 2540 } 2541 i++; 2542 } 2543 2544 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2545 /* 2546 * Can't stuff more data into the current PDU; 2547 * queue it. Note that's not enough to check 2548 * for kern_data_resid == 0 instead; there 2549 * may be several Data-In PDUs for the final 2550 * call to cfiscsi_datamove(), and we want 2551 * to set the F flag only on the last of them. 2552 */ 2553 buffer_offset += response->ip_data_len; 2554 if (buffer_offset == io->scsiio.kern_total_len || 2555 buffer_offset == expected_len) 2556 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2557 cfiscsi_pdu_queue(response); 2558 response = NULL; 2559 bhsdi = NULL; 2560 } 2561 } 2562 if (response != NULL) { 2563 buffer_offset += response->ip_data_len; 2564 if (buffer_offset == io->scsiio.kern_total_len || 2565 buffer_offset == expected_len) 2566 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2567 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2568 cfiscsi_pdu_queue(response); 2569 } 2570 2571 io->scsiio.be_move_done(io); 2572} 2573 2574static void 2575cfiscsi_datamove_out(union ctl_io *io) 2576{ 2577 struct cfiscsi_session *cs; 2578 struct icl_pdu *request, *response; 2579 const struct iscsi_bhs_scsi_command *bhssc; 2580 struct iscsi_bhs_r2t *bhsr2t; 2581 struct cfiscsi_data_wait *cdw; 2582 uint32_t target_transfer_tag; 2583 bool done; 2584 2585 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2586 cs = PDU_SESSION(request); 2587 2588 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2589 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2590 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2591 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2592 2593 /* 2594 * We need to record it so that we can properly report 2595 * underflow/underflow. 2596 */ 2597 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2598 2599 /* 2600 * We hadn't received anything during this datamove yet. 2601 */ 2602 io->scsiio.ext_data_filled = 0; 2603 2604 target_transfer_tag = 2605 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2606 2607#if 0 2608 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2609 "task tag 0x%x, target transfer tag 0x%x", 2610 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2611#endif 2612 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2613 if (cdw == 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 cdw->cdw_ctl_io = io; 2622 cdw->cdw_target_transfer_tag = target_transfer_tag; 2623 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2624 2625 if (cs->cs_immediate_data && io->scsiio.kern_rel_offset < 2626 icl_pdu_data_segment_length(request)) { 2627 done = cfiscsi_handle_data_segment(request, cdw); 2628 if (done) { 2629 uma_zfree(cfiscsi_data_wait_zone, cdw); 2630 io->scsiio.be_move_done(io); 2631 return; 2632 } 2633 } 2634 2635 CFISCSI_SESSION_LOCK(cs); 2636 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2637 CFISCSI_SESSION_UNLOCK(cs); 2638 2639 /* 2640 * XXX: We should limit the number of outstanding R2T PDUs 2641 * per task to MaxOutstandingR2T. 2642 */ 2643 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2644 if (response == NULL) { 2645 CFISCSI_SESSION_WARN(cs, "failed to " 2646 "allocate memory; dropping connection"); 2647 ctl_set_busy(&io->scsiio); 2648 io->scsiio.be_move_done(io); 2649 cfiscsi_session_terminate(cs); 2650 return; 2651 } 2652 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2653 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2654 bhsr2t->bhsr2t_flags = 0x80; 2655 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2656 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2657 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2658 /* 2659 * XXX: Here we assume that cfiscsi_datamove() won't ever 2660 * be running concurrently on several CPUs for a given 2661 * command. 2662 */ 2663 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2664 PDU_R2TSN(request)++; 2665 /* 2666 * This is the offset within the current SCSI command; 2667 * i.e. for the first call of datamove(), it will be 0, 2668 * and for subsequent ones it will be the sum of lengths 2669 * of previous ones. 2670 * 2671 * The ext_data_filled is to account for unsolicited 2672 * (immediate) data that might have already arrived. 2673 */ 2674 bhsr2t->bhsr2t_buffer_offset = 2675 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2676 /* 2677 * This is the total length (sum of S/G lengths) this call 2678 * to cfiscsi_datamove() is supposed to handle. 2679 * 2680 * XXX: Limit it to MaxBurstLength. 2681 */ 2682 bhsr2t->bhsr2t_desired_data_transfer_length = 2683 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2684 cfiscsi_pdu_queue(response); 2685} 2686 2687static void 2688cfiscsi_datamove(union ctl_io *io) 2689{ 2690 2691 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2692 cfiscsi_datamove_in(io); 2693 else 2694 cfiscsi_datamove_out(io); 2695} 2696 2697static void 2698cfiscsi_scsi_command_done(union ctl_io *io) 2699{ 2700 struct icl_pdu *request, *response; 2701 struct iscsi_bhs_scsi_command *bhssc; 2702 struct iscsi_bhs_scsi_response *bhssr; 2703#ifdef DIAGNOSTIC 2704 struct cfiscsi_data_wait *cdw; 2705#endif 2706 struct cfiscsi_session *cs; 2707 uint16_t sense_length; 2708 2709 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2710 cs = PDU_SESSION(request); 2711 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2712 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2713 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2714 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2715 2716 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2717 // bhssc->bhssc_initiator_task_tag); 2718 2719#ifdef DIAGNOSTIC 2720 CFISCSI_SESSION_LOCK(cs); 2721 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2722 KASSERT(bhssc->bhssc_initiator_task_tag != 2723 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2724 CFISCSI_SESSION_UNLOCK(cs); 2725#endif 2726 2727 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2728 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2729 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2730 bhssr->bhssr_flags = 0x80; 2731 /* 2732 * XXX: We don't deal with bidirectional under/overflows; 2733 * does anything actually support those? 2734 */ 2735 if (PDU_TOTAL_TRANSFER_LEN(request) < 2736 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2737 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2738 bhssr->bhssr_residual_count = 2739 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2740 PDU_TOTAL_TRANSFER_LEN(request)); 2741 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2742 // ntohl(bhssr->bhssr_residual_count)); 2743 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2744 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2745 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2746 bhssr->bhssr_residual_count = 2747 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2748 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2749 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2750 // ntohl(bhssr->bhssr_residual_count)); 2751 } 2752 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2753 bhssr->bhssr_status = io->scsiio.scsi_status; 2754 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2755 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2756 2757 if (io->scsiio.sense_len > 0) { 2758#if 0 2759 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2760 io->scsiio.sense_len); 2761#endif 2762 sense_length = htons(io->scsiio.sense_len); 2763 icl_pdu_append_data(response, 2764 &sense_length, sizeof(sense_length), M_WAITOK); 2765 icl_pdu_append_data(response, 2766 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2767 } 2768 2769 ctl_free_io(io); 2770 icl_pdu_free(request); 2771 cfiscsi_pdu_queue(response); 2772} 2773 2774static void 2775cfiscsi_task_management_done(union ctl_io *io) 2776{ 2777 struct icl_pdu *request, *response; 2778 struct iscsi_bhs_task_management_request *bhstmr; 2779 struct iscsi_bhs_task_management_response *bhstmr2; 2780 struct cfiscsi_data_wait *cdw, *tmpcdw; 2781 struct cfiscsi_session *cs; 2782 2783 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2784 cs = PDU_SESSION(request); 2785 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2786 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2787 ISCSI_BHS_OPCODE_TASK_REQUEST, 2788 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2789 2790#if 0 2791 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2792 bhstmr->bhstmr_initiator_task_tag, 2793 bhstmr->bhstmr_referenced_task_tag); 2794#endif 2795 2796 if ((bhstmr->bhstmr_function & ~0x80) == 2797 BHSTMR_FUNCTION_ABORT_TASK) { 2798 /* 2799 * Make sure we no longer wait for Data-Out for this command. 2800 */ 2801 CFISCSI_SESSION_LOCK(cs); 2802 TAILQ_FOREACH_SAFE(cdw, 2803 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2804 if (bhstmr->bhstmr_referenced_task_tag != 2805 cdw->cdw_initiator_task_tag) 2806 continue; 2807 2808#if 0 2809 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2810 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2811#endif 2812 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2813 cdw, cdw_next); 2814 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2815 uma_zfree(cfiscsi_data_wait_zone, cdw); 2816 } 2817 CFISCSI_SESSION_UNLOCK(cs); 2818 } 2819 2820 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2821 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2822 response->ip_bhs; 2823 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2824 bhstmr2->bhstmr_flags = 0x80; 2825 if (io->io_hdr.status == CTL_SUCCESS) { 2826 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2827 } else { 2828 /* 2829 * XXX: How to figure out what exactly went wrong? iSCSI spec 2830 * expects us to provide detailed error, e.g. "Task does 2831 * not exist" or "LUN does not exist". 2832 */ 2833 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2834 bhstmr2->bhstmr_response = 2835 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2836 } 2837 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2838 2839 ctl_free_io(io); 2840 icl_pdu_free(request); 2841 cfiscsi_pdu_queue(response); 2842} 2843 2844static void 2845cfiscsi_done(union ctl_io *io) 2846{ 2847 struct icl_pdu *request; 2848 struct cfiscsi_session *cs; 2849 2850 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2851 ("invalid CTL status %#x", io->io_hdr.status)); 2852 2853 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2854 if (request == NULL) { 2855 /* 2856 * Implicit task termination has just completed; nothing to do. 2857 */ 2858 return; 2859 } 2860 2861 cs = PDU_SESSION(request); 2862 refcount_release(&cs->cs_outstanding_ctl_pdus); 2863 2864 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2865 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2866 cfiscsi_scsi_command_done(io); 2867 break; 2868 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2869 cfiscsi_task_management_done(io); 2870 break; 2871 default: 2872 panic("cfiscsi_done called with wrong opcode 0x%x", 2873 request->ip_bhs->bhs_opcode); 2874 } 2875} 2876