ctl_frontend_iscsi.c revision 256197
1/*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 256197 2013-10-09 17:06:03Z trasz $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 256197 2013-10-09 17:06:03Z trasz $"); 38 39#include <sys/param.h> 40#include <sys/capability.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include "../../dev/iscsi/icl.h" 71#include "../../dev/iscsi/iscsi_proto.h" 72#include "ctl_frontend_iscsi.h" 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 79static uma_zone_t cfiscsi_data_wait_zone; 80 81SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 82 "CAM Target Layer iSCSI Frontend"); 83static int debug = 3; 84TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 85SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RW, 86 &debug, 1, "Enable debug messages"); 87static int ping_timeout = 5; 88TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RW, 90 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 91static int login_timeout = 60; 92TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RW, 94 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 95static int maxcmdsn_delta = 256; 96TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RW, 98 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 99 "without confirmation"); 100 101#define CFISCSI_DEBUG(X, ...) \ 102 if (debug > 1) { \ 103 printf("%s: " X "\n", __func__, ## __VA_ARGS__);\ 104 } while (0) 105 106#define CFISCSI_WARN(X, ...) \ 107 if (debug > 0) { \ 108 printf("WARNING: %s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } while (0) 111 112#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 113 if (debug > 1) { \ 114 printf("%s: %s (%s): " X "\n", \ 115 __func__, S->cs_initiator_addr, \ 116 S->cs_initiator_name, ## __VA_ARGS__); \ 117 } while (0) 118 119#define CFISCSI_SESSION_WARN(S, X, ...) \ 120 if (debug > 0) { \ 121 printf("WARNING: %s (%s): " X "\n", \ 122 S->cs_initiator_addr, \ 123 S->cs_initiator_name, ## __VA_ARGS__); \ 124 } while (0) 125 126#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 127#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 128#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 129 130#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 131#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 132#define PDU_EXPDATASN(X) (X)->ip_prv0 133#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 134#define PDU_R2TSN(X) (X)->ip_prv2 135 136int cfiscsi_init(void); 137static void cfiscsi_online(void *arg); 138static void cfiscsi_offline(void *arg); 139static int cfiscsi_targ_enable(void *arg, struct ctl_id targ_id); 140static int cfiscsi_targ_disable(void *arg, struct ctl_id targ_id); 141static int cfiscsi_lun_enable(void *arg, 142 struct ctl_id target_id, int lun_id); 143static int cfiscsi_lun_disable(void *arg, 144 struct ctl_id target_id, int lun_id); 145static int cfiscsi_ioctl(struct cdev *dev, 146 u_long cmd, caddr_t addr, int flag, struct thread *td); 147static int cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len); 148static void cfiscsi_datamove(union ctl_io *io); 149static void cfiscsi_done(union ctl_io *io); 150static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun); 151static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 152static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 153static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 154static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 155static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 156static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 157static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 158static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 159 *softc, const char *name); 160static void cfiscsi_target_release(struct cfiscsi_target *ct); 161static void cfiscsi_session_delete(struct cfiscsi_session *cs); 162 163static struct cfiscsi_softc cfiscsi_softc; 164extern struct ctl_softc *control_softc; 165 166static int cfiscsi_module_event_handler(module_t, int /*modeventtype_t*/, void *); 167 168static moduledata_t cfiscsi_moduledata = { 169 "ctlcfiscsi", 170 cfiscsi_module_event_handler, 171 NULL 172}; 173 174DECLARE_MODULE(ctlcfiscsi, cfiscsi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH); 175MODULE_VERSION(ctlcfiscsi, 1); 176MODULE_DEPEND(ctlcfiscsi, ctl, 1, 1, 1); 177MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 178 179static struct icl_pdu * 180cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 181{ 182 183 return (icl_pdu_new_bhs(request->ip_conn, flags)); 184} 185 186static bool 187cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 188{ 189 const struct iscsi_bhs_scsi_command *bhssc; 190 struct cfiscsi_session *cs; 191 uint32_t cmdsn, expstatsn; 192 193 cs = PDU_SESSION(request); 194 195 /* 196 * Every incoming PDU - not just NOP-Out - resets the ping timer. 197 * The purpose of the timeout is to reset the connection when it stalls; 198 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 199 * in some queue. 200 * 201 * XXX: Locking? 202 */ 203 cs->cs_timeout = 0; 204 205 /* 206 * Data-Out PDUs don't contain CmdSN. 207 */ 208 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 209 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 210 return (false); 211 212 /* 213 * We're only using fields common for all the request 214 * (initiator -> target) PDUs. 215 */ 216 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 217 cmdsn = ntohl(bhssc->bhssc_cmdsn); 218 expstatsn = ntohl(bhssc->bhssc_expstatsn); 219 220 CFISCSI_SESSION_LOCK(cs); 221#if 0 222 if (expstatsn != cs->cs_statsn) { 223 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 224 "while current StatSN is %d", expstatsn, 225 cs->cs_statsn); 226 } 227#endif 228 229 /* 230 * The target MUST silently ignore any non-immediate command outside 231 * of this range. 232 * 233 * XXX: ... or non-immediate duplicates within the range. 234 */ 235 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 236 CFISCSI_SESSION_UNLOCK(cs); 237 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 238 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 239 return (true); 240 } 241 242 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 243 cs->cs_cmdsn++; 244 245 CFISCSI_SESSION_UNLOCK(cs); 246 247 return (false); 248} 249 250static void 251cfiscsi_pdu_handle(struct icl_pdu *request) 252{ 253 struct cfiscsi_session *cs; 254 bool ignore; 255 256 cs = PDU_SESSION(request); 257 258 ignore = cfiscsi_pdu_update_cmdsn(request); 259 if (ignore) { 260 icl_pdu_free(request); 261 return; 262 } 263 264 /* 265 * Handle the PDU; this includes e.g. receiving the remaining 266 * part of PDU and submitting the SCSI command to CTL 267 * or queueing a reply. The handling routine is responsible 268 * for freeing the PDU when it's no longer needed. 269 */ 270 switch (request->ip_bhs->bhs_opcode & 271 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 272 case ISCSI_BHS_OPCODE_NOP_OUT: 273 cfiscsi_pdu_handle_nop_out(request); 274 break; 275 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 276 cfiscsi_pdu_handle_scsi_command(request); 277 break; 278 case ISCSI_BHS_OPCODE_TASK_REQUEST: 279 cfiscsi_pdu_handle_task_request(request); 280 break; 281 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 282 cfiscsi_pdu_handle_data_out(request); 283 break; 284 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 285 cfiscsi_pdu_handle_logout_request(request); 286 break; 287 default: 288 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 289 "opcode 0x%x; dropping connection", 290 request->ip_bhs->bhs_opcode); 291 icl_pdu_free(request); 292 cfiscsi_session_terminate(cs); 293 } 294 295} 296 297static void 298cfiscsi_receive_callback(struct icl_pdu *request) 299{ 300 struct cfiscsi_session *cs; 301 302 cs = PDU_SESSION(request); 303 304#ifdef ICL_KERNEL_PROXY 305 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 306 if (cs->cs_login_pdu == NULL) 307 cs->cs_login_pdu = request; 308 else 309 icl_pdu_free(request); 310 cv_signal(&cs->cs_login_cv); 311 return; 312 } 313#endif 314 315 cfiscsi_pdu_handle(request); 316} 317 318static void 319cfiscsi_error_callback(struct icl_conn *ic) 320{ 321 struct cfiscsi_session *cs; 322 323 cs = CONN_SESSION(ic); 324 325 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 326 cfiscsi_session_terminate(cs); 327} 328 329static int 330cfiscsi_pdu_prepare(struct icl_pdu *response) 331{ 332 struct cfiscsi_session *cs; 333 struct iscsi_bhs_scsi_response *bhssr; 334 bool advance_statsn = true; 335 336 cs = PDU_SESSION(response); 337 338 CFISCSI_SESSION_LOCK_ASSERT(cs); 339 340 /* 341 * We're only using fields common for all the response 342 * (target -> initiator) PDUs. 343 */ 344 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 345 346 /* 347 * 10.8.3: "The StatSN for this connection is not advanced 348 * after this PDU is sent." 349 */ 350 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 351 advance_statsn = false; 352 353 /* 354 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 355 * StatSN for the connection is not advanced after this PDU is sent." 356 */ 357 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 358 bhssr->bhssr_initiator_task_tag == 0xffffffff) 359 advance_statsn = false; 360 361 /* 362 * See the comment below - StatSN is not meaningful and must 363 * not be advanced. 364 */ 365 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 366 advance_statsn = false; 367 368 /* 369 * 10.7.3: "The fields StatSN, Status, and Residual Count 370 * only have meaningful content if the S bit is set to 1." 371 */ 372 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 373 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 374 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 375 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 376 377 if (advance_statsn) 378 cs->cs_statsn++; 379 380 return (0); 381} 382 383static void 384cfiscsi_pdu_queue(struct icl_pdu *response) 385{ 386 struct cfiscsi_session *cs; 387 388 cs = PDU_SESSION(response); 389 390 CFISCSI_SESSION_LOCK(cs); 391 cfiscsi_pdu_prepare(response); 392 icl_pdu_queue(response); 393 CFISCSI_SESSION_UNLOCK(cs); 394} 395 396static uint32_t 397cfiscsi_decode_lun(uint64_t encoded) 398{ 399 uint8_t lun[8]; 400 uint32_t result; 401 402 /* 403 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 404 * but is in fact an evil, multidimensional structure defined 405 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 406 */ 407 memcpy(lun, &encoded, sizeof(lun)); 408 switch (lun[0] & 0xC0) { 409 case 0x00: 410 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 411 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 412 CFISCSI_WARN("malformed LUN " 413 "(peripheral device addressing method): 0x%jx", 414 (uintmax_t)encoded); 415 result = 0xffffffff; 416 break; 417 } 418 result = lun[1]; 419 break; 420 case 0x40: 421 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 422 lun[6] != 0 || lun[7] != 0) { 423 CFISCSI_WARN("malformed LUN " 424 "(flat address space addressing method): 0x%jx", 425 (uintmax_t)encoded); 426 result = 0xffffffff; 427 break; 428 } 429 result = ((lun[0] & 0x3f) << 8) + lun[1]; 430 break; 431 case 0xC0: 432 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 433 lun[6] != 0 || lun[7] != 0) { 434 CFISCSI_WARN("malformed LUN (extended flat " 435 "address space addressing method): 0x%jx", 436 (uintmax_t)encoded); 437 result = 0xffffffff; 438 break; 439 } 440 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 441 default: 442 CFISCSI_WARN("unsupported LUN format 0x%jx", 443 (uintmax_t)encoded); 444 result = 0xffffffff; 445 break; 446 } 447 448 return (result); 449} 450 451static void 452cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 453{ 454 struct cfiscsi_session *cs; 455 struct iscsi_bhs_nop_out *bhsno; 456 struct iscsi_bhs_nop_in *bhsni; 457 struct icl_pdu *response; 458 void *data = NULL; 459 size_t datasize; 460 int error; 461 462 cs = PDU_SESSION(request); 463 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 464 465 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 466 /* 467 * Nothing to do, iscsi_pdu_update_statsn() already 468 * zeroed the timeout. 469 */ 470 icl_pdu_free(request); 471 return; 472 } 473 474 datasize = icl_pdu_data_segment_length(request); 475 if (datasize > 0) { 476 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 477 if (data == NULL) { 478 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 479 "dropping connection"); 480 icl_pdu_free(request); 481 cfiscsi_session_terminate(cs); 482 return; 483 } 484 icl_pdu_get_data(request, 0, data, datasize); 485 } 486 487 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 488 if (response == NULL) { 489 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 490 "droppping connection"); 491 free(data, M_CFISCSI); 492 icl_pdu_free(request); 493 cfiscsi_session_terminate(cs); 494 return; 495 } 496 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 497 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 498 bhsni->bhsni_flags = 0x80; 499 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 500 bhsni->bhsni_target_transfer_tag = 0xffffffff; 501 if (datasize > 0) { 502 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 503 if (error != 0) { 504 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 505 "dropping connection"); 506 free(data, M_CFISCSI); 507 icl_pdu_free(request); 508 icl_pdu_free(response); 509 cfiscsi_session_terminate(cs); 510 return; 511 } 512 free(data, M_CFISCSI); 513 } 514 515 icl_pdu_free(request); 516 cfiscsi_pdu_queue(response); 517} 518 519static void 520cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 521{ 522 struct iscsi_bhs_scsi_command *bhssc; 523 struct cfiscsi_session *cs; 524 union ctl_io *io; 525 int error; 526 527 cs = PDU_SESSION(request); 528 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 529 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 530 // bhssc->bhssc_initiator_task_tag); 531 532 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 533 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 534 "ImmediateData=No; dropping connection"); 535 icl_pdu_free(request); 536 cfiscsi_session_terminate(cs); 537 return; 538 } 539 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 540 if (io == NULL) { 541 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 542 "dropping connection"); 543 icl_pdu_free(request); 544 cfiscsi_session_terminate(cs); 545 return; 546 } 547 ctl_zero_io(io); 548 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 549 io->io_hdr.io_type = CTL_IO_SCSI; 550 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 551 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 552 io->io_hdr.nexus.targ_target.id = 0; 553 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 554 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 555 io->io_hdr.nexus.lun_map_arg = cs; 556 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 557 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 558 case BHSSC_FLAGS_ATTR_UNTAGGED: 559 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 560 break; 561 case BHSSC_FLAGS_ATTR_SIMPLE: 562 io->scsiio.tag_type = CTL_TAG_SIMPLE; 563 break; 564 case BHSSC_FLAGS_ATTR_ORDERED: 565 io->scsiio.tag_type = CTL_TAG_ORDERED; 566 break; 567 case BHSSC_FLAGS_ATTR_HOQ: 568 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 569 break; 570 case BHSSC_FLAGS_ATTR_ACA: 571 io->scsiio.tag_type = CTL_TAG_ACA; 572 break; 573 default: 574 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 575 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 576 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 577 break; 578 } 579 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 580 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 581 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 582 error = ctl_queue(io); 583 if (error != CTL_RETVAL_COMPLETE) { 584 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 585 "dropping connection", error); 586 ctl_free_io(io); 587 refcount_release(&cs->cs_outstanding_ctl_pdus); 588 icl_pdu_free(request); 589 cfiscsi_session_terminate(cs); 590 } 591} 592 593static void 594cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 595{ 596 struct iscsi_bhs_task_management_request *bhstmr; 597 struct iscsi_bhs_task_management_response *bhstmr2; 598 struct icl_pdu *response; 599 struct cfiscsi_session *cs; 600 union ctl_io *io; 601 int error; 602 603 cs = PDU_SESSION(request); 604 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 605 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 606 if (io == NULL) { 607 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 608 "dropping connection"); 609 icl_pdu_free(request); 610 cfiscsi_session_terminate(cs); 611 return; 612 } 613 ctl_zero_io(io); 614 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 615 io->io_hdr.io_type = CTL_IO_TASK; 616 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 617 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 618 io->io_hdr.nexus.targ_target.id = 0; 619 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 620 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 621 io->io_hdr.nexus.lun_map_arg = cs; 622 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 623 624 switch (bhstmr->bhstmr_function & ~0x80) { 625 case BHSTMR_FUNCTION_ABORT_TASK: 626#if 0 627 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 628#endif 629 io->taskio.task_action = CTL_TASK_ABORT_TASK; 630 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 631 break; 632 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 633#if 0 634 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 635#endif 636 io->taskio.task_action = CTL_TASK_LUN_RESET; 637 break; 638 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 639#if 0 640 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 641#endif 642 io->taskio.task_action = CTL_TASK_BUS_RESET; 643 break; 644 default: 645 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 646 bhstmr->bhstmr_function & ~0x80); 647 ctl_free_io(io); 648 649 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 650 if (response == NULL) { 651 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 652 "dropping connection"); 653 icl_pdu_free(request); 654 cfiscsi_session_terminate(cs); 655 return; 656 } 657 bhstmr2 = (struct iscsi_bhs_task_management_response *) 658 response->ip_bhs; 659 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 660 bhstmr2->bhstmr_flags = 0x80; 661 bhstmr2->bhstmr_response = 662 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 663 bhstmr2->bhstmr_initiator_task_tag = 664 bhstmr->bhstmr_initiator_task_tag; 665 icl_pdu_free(request); 666 cfiscsi_pdu_queue(response); 667 return; 668 } 669 670 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 671 error = ctl_queue(io); 672 if (error != CTL_RETVAL_COMPLETE) { 673 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 674 "dropping connection", error); 675 ctl_free_io(io); 676 refcount_release(&cs->cs_outstanding_ctl_pdus); 677 icl_pdu_free(request); 678 cfiscsi_session_terminate(cs); 679 } 680} 681 682static bool 683cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 684{ 685 struct iscsi_bhs_data_out *bhsdo; 686 struct cfiscsi_session *cs; 687 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 688 size_t copy_len, len, off, buffer_offset; 689 int ctl_sg_count; 690 union ctl_io *io; 691 692 cs = PDU_SESSION(request); 693 694 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 695 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 696 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 697 ISCSI_BHS_OPCODE_SCSI_COMMAND, 698 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 699 700 /* 701 * We're only using fields common for Data Out and SCSI Command PDUs. 702 */ 703 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 704 705 io = cdw->cdw_ctl_io; 706 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 707 ("CTL_FLAG_DATA_IN")); 708 709#if 0 710 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 711 request->ip_data_len, io->scsiio.kern_total_len); 712#endif 713 714 if (io->scsiio.kern_sg_entries > 0) { 715 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 716 ctl_sg_count = io->scsiio.kern_sg_entries; 717 } else { 718 ctl_sglist = &ctl_sg_entry; 719 ctl_sglist->addr = io->scsiio.kern_data_ptr; 720 ctl_sglist->len = io->scsiio.kern_data_len; 721 ctl_sg_count = 1; 722 } 723#if 0 724 if (ctl_sg_count > 1) 725 CFISCSI_SESSION_DEBUG(cs, "ctl_sg_count = %d", ctl_sg_count); 726#endif 727 728 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 729 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 730 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 731 else 732 buffer_offset = 0; 733 734 /* 735 * Make sure the offset, as sent by the initiator, matches the offset 736 * we're supposed to be at in the scatter-gather list. 737 */ 738 if (buffer_offset != io->scsiio.ext_data_filled) { 739 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 740 "expected %zd", buffer_offset, 741 (size_t)io->scsiio.ext_data_filled); 742 cfiscsi_session_terminate(cs); 743 return (true); 744 } 745 746 /* 747 * This is the offset within the PDU data segment, as opposed 748 * to buffer_offset, which is the offset within the task (SCSI 749 * command). 750 */ 751 off = 0; 752 len = icl_pdu_data_segment_length(request); 753 754 /* 755 * Iterate over the scatter/gather segments, filling them with data 756 * from the PDU data segment. Note that this can get called multiple 757 * times for one SCSI command; the cdw structure holds state for the 758 * scatter/gather list. 759 */ 760 for (;;) { 761 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 762 ("cdw->cdw_sg_index >= ctl_sg_count")); 763 if (cdw->cdw_sg_len == 0) { 764 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 765 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 766 } 767 KASSERT(off <= len, ("len > off")); 768 copy_len = len - off; 769 if (copy_len > cdw->cdw_sg_len) 770 copy_len = cdw->cdw_sg_len; 771 772 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 773 cdw->cdw_sg_addr += copy_len; 774 cdw->cdw_sg_len -= copy_len; 775 off += copy_len; 776 io->scsiio.ext_data_filled += copy_len; 777 778 if (cdw->cdw_sg_len == 0) { 779 /* 780 * End of current segment. 781 */ 782 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 783 /* 784 * Last segment in scatter/gather list. 785 */ 786 break; 787 } 788 cdw->cdw_sg_index++; 789 } 790 791 if (off == len) { 792 /* 793 * End of PDU payload. 794 */ 795 break; 796 } 797 } 798 799 if (len > off) { 800 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 801 "expected %zd", icl_pdu_data_segment_length(request), off); 802 cfiscsi_session_terminate(cs); 803 return (true); 804 } 805 806 if (bhsdo->bhsdo_flags & BHSDO_FLAGS_F || 807 io->scsiio.ext_data_filled == io->scsiio.kern_total_len) { 808 if ((bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 809 CFISCSI_SESSION_WARN(cs, "got the final packet without " 810 "the F flag; flags = 0x%x; dropping connection", 811 bhsdo->bhsdo_flags); 812 cfiscsi_session_terminate(cs); 813 return (true); 814 } 815 816 if (io->scsiio.ext_data_filled != io->scsiio.kern_total_len) { 817 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 818 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 819 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 820 "transmitted size was %zd bytes instead of %d; " 821 "dropping connection", 822 (size_t)io->scsiio.ext_data_filled, 823 io->scsiio.kern_total_len); 824 cfiscsi_session_terminate(cs); 825 return (true); 826 } else { 827 /* 828 * For SCSI Command PDU, this just means we need to 829 * solicit more data by sending R2T. 830 */ 831 return (false); 832 } 833 } 834#if 0 835 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 836 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 837#endif 838 839 return (true); 840 } 841 842 return (false); 843} 844 845static void 846cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 847{ 848 struct iscsi_bhs_data_out *bhsdo; 849 struct cfiscsi_session *cs; 850 struct cfiscsi_data_wait *cdw = NULL; 851 union ctl_io *io; 852 bool done; 853 854 cs = PDU_SESSION(request); 855 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 856 857 CFISCSI_SESSION_LOCK(cs); 858 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 859#if 0 860 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 861 "ttt 0x%x, itt 0x%x", 862 bhsdo->bhsdo_target_transfer_tag, 863 bhsdo->bhsdo_initiator_task_tag, 864 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 865#endif 866 if (bhsdo->bhsdo_target_transfer_tag == 867 cdw->cdw_target_transfer_tag) 868 break; 869 } 870 CFISCSI_SESSION_UNLOCK(cs); 871 if (cdw == NULL) { 872 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 873 "0x%x, not found; dropping connection", 874 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 875 icl_pdu_free(request); 876 cfiscsi_session_terminate(cs); 877 return; 878 } 879 880 io = cdw->cdw_ctl_io; 881 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 882 ("CTL_FLAG_DATA_IN")); 883 884 done = cfiscsi_handle_data_segment(request, cdw); 885 if (done) { 886 CFISCSI_SESSION_LOCK(cs); 887 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 888 CFISCSI_SESSION_UNLOCK(cs); 889 uma_zfree(cfiscsi_data_wait_zone, cdw); 890 io->scsiio.be_move_done(io); 891 } 892 893 icl_pdu_free(request); 894} 895 896static void 897cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 898{ 899 struct iscsi_bhs_logout_request *bhslr; 900 struct iscsi_bhs_logout_response *bhslr2; 901 struct icl_pdu *response; 902 struct cfiscsi_session *cs; 903 904 cs = PDU_SESSION(request); 905 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 906 switch (bhslr->bhslr_reason & 0x7f) { 907 case BHSLR_REASON_CLOSE_SESSION: 908 case BHSLR_REASON_CLOSE_CONNECTION: 909 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 910 if (response == NULL) { 911 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 912 icl_pdu_free(request); 913 cfiscsi_session_terminate(cs); 914 return; 915 } 916 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 917 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 918 bhslr2->bhslr_flags = 0x80; 919 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 920 bhslr2->bhslr_initiator_task_tag = 921 bhslr->bhslr_initiator_task_tag; 922 icl_pdu_free(request); 923 cfiscsi_pdu_queue(response); 924 cfiscsi_session_terminate(cs); 925 break; 926 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 927 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 928 if (response == NULL) { 929 CFISCSI_SESSION_WARN(cs, 930 "failed to allocate memory; dropping connection"); 931 icl_pdu_free(request); 932 cfiscsi_session_terminate(cs); 933 return; 934 } 935 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 936 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 937 bhslr2->bhslr_flags = 0x80; 938 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 939 bhslr2->bhslr_initiator_task_tag = 940 bhslr->bhslr_initiator_task_tag; 941 icl_pdu_free(request); 942 cfiscsi_pdu_queue(response); 943 break; 944 default: 945 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 946 bhslr->bhslr_reason); 947 icl_pdu_free(request); 948 cfiscsi_session_terminate(cs); 949 break; 950 } 951} 952 953static void 954cfiscsi_callout(void *context) 955{ 956 struct icl_pdu *cp; 957 struct iscsi_bhs_nop_in *bhsni; 958 struct cfiscsi_session *cs; 959 960 cs = context; 961 962 if (cs->cs_terminating) 963 return; 964 965 callout_schedule(&cs->cs_callout, 1 * hz); 966 967 CFISCSI_SESSION_LOCK(cs); 968 cs->cs_timeout++; 969 CFISCSI_SESSION_UNLOCK(cs); 970 971#ifdef ICL_KERNEL_PROXY 972 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 973 if (cs->cs_timeout > login_timeout) { 974 CFISCSI_SESSION_WARN(cs, "login timed out after " 975 "%d seconds; dropping connection", cs->cs_timeout); 976 cfiscsi_session_terminate(cs); 977 } 978 return; 979 } 980#endif 981 982 if (cs->cs_timeout >= ping_timeout) { 983 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 984 "dropping connection", ping_timeout); 985 cfiscsi_session_terminate(cs); 986 return; 987 } 988 989 /* 990 * If the ping was reset less than one second ago - which means 991 * that we've received some PDU during the last second - assume 992 * the traffic flows correctly and don't bother sending a NOP-Out. 993 * 994 * (It's 2 - one for one second, and one for incrementing is_timeout 995 * earlier in this routine.) 996 */ 997 if (cs->cs_timeout < 2) 998 return; 999 1000 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1001 if (cp == NULL) { 1002 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1003 return; 1004 } 1005 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1006 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1007 bhsni->bhsni_flags = 0x80; 1008 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1009 1010 cfiscsi_pdu_queue(cp); 1011} 1012 1013static void 1014cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1015{ 1016 struct cfiscsi_data_wait *cdw, *tmpcdw; 1017 union ctl_io *io; 1018 int error; 1019 1020#ifdef notyet 1021 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1022 if (io == NULL) { 1023 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1024 return; 1025 } 1026 ctl_zero_io(io); 1027 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1028 io->io_hdr.io_type = CTL_IO_TASK; 1029 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1030 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1031 io->io_hdr.nexus.targ_target.id = 0; 1032 io->io_hdr.nexus.targ_lun = lun; 1033 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1034 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1035 error = ctl_queue(io); 1036 if (error != CTL_RETVAL_COMPLETE) { 1037 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1038 ctl_free_io(io); 1039 } 1040#else 1041 /* 1042 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1043 * just iterate over tasks that are waiting for something - data - and 1044 * terminate those. 1045 */ 1046 CFISCSI_SESSION_LOCK(cs); 1047 TAILQ_FOREACH_SAFE(cdw, 1048 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1049 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1050 if (io == NULL) { 1051 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1052 return; 1053 } 1054 ctl_zero_io(io); 1055 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1056 io->io_hdr.io_type = CTL_IO_TASK; 1057 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1058 io->io_hdr.nexus.targ_port = 1059 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; /* Not needed? */ 1062 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1063 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1064 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1065 error = ctl_queue(io); 1066 if (error != CTL_RETVAL_COMPLETE) { 1067 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1068 ctl_free_io(io); 1069 return; 1070 } 1071#if 0 1072 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1073 "0x%x", cdw->cdw_initiator_task_tag); 1074#endif 1075 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1076 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1077 uma_zfree(cfiscsi_data_wait_zone, cdw); 1078 } 1079 CFISCSI_SESSION_UNLOCK(cs); 1080#endif 1081} 1082 1083static void 1084cfiscsi_maintenance_thread(void *arg) 1085{ 1086 struct cfiscsi_session *cs; 1087 1088 cs = arg; 1089 1090 for (;;) { 1091 CFISCSI_SESSION_LOCK(cs); 1092 if (cs->cs_terminating == false) 1093 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1094 CFISCSI_SESSION_UNLOCK(cs); 1095 1096 if (cs->cs_terminating) { 1097 cfiscsi_session_terminate_tasks(cs); 1098 callout_drain(&cs->cs_callout); 1099 1100 icl_conn_shutdown(cs->cs_conn); 1101 icl_conn_close(cs->cs_conn); 1102 1103 cs->cs_terminating++; 1104 1105 /* 1106 * XXX: We used to wait up to 30 seconds to deliver queued PDUs 1107 * to the initiator. We also tried hard to deliver SCSI Responses 1108 * for the aborted PDUs. We don't do that anymore. We might need 1109 * to revisit that. 1110 */ 1111 1112 cfiscsi_session_delete(cs); 1113 kthread_exit(); 1114 return; 1115 } 1116 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1117 } 1118} 1119 1120static void 1121cfiscsi_session_terminate(struct cfiscsi_session *cs) 1122{ 1123 1124 if (cs->cs_terminating != 0) 1125 return; 1126 cs->cs_terminating = 1; 1127 cv_signal(&cs->cs_maintenance_cv); 1128} 1129 1130static int 1131cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1132{ 1133 int error, i; 1134 struct cfiscsi_softc *softc; 1135 1136 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1137 1138 softc = &cfiscsi_softc; 1139 1140 mtx_lock(&softc->lock); 1141 for (i = 0; i < softc->max_initiators; i++) { 1142 if (softc->ctl_initids[i] == 0) 1143 break; 1144 } 1145 if (i == softc->max_initiators) { 1146 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1147 softc->max_initiators); 1148 mtx_unlock(&softc->lock); 1149 return (1); 1150 } 1151 softc->ctl_initids[i] = 1; 1152 mtx_unlock(&softc->lock); 1153 1154#if 0 1155 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1156 i, softc->max_initiators); 1157#endif 1158 cs->cs_ctl_initid = i; 1159 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1160 if (error != 0) { 1161 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1162 mtx_lock(&softc->lock); 1163 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1164 mtx_unlock(&softc->lock); 1165 cs->cs_ctl_initid = -1; 1166 return (1); 1167 } 1168 1169 return (0); 1170} 1171 1172static void 1173cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1174{ 1175 int error; 1176 struct cfiscsi_softc *softc; 1177 1178 if (cs->cs_ctl_initid == -1) 1179 return; 1180 1181 softc = &cfiscsi_softc; 1182 1183 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1184 if (error != 0) { 1185 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1186 error); 1187 } 1188 mtx_lock(&softc->lock); 1189 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1190 mtx_unlock(&softc->lock); 1191 cs->cs_ctl_initid = -1; 1192} 1193 1194static struct cfiscsi_session * 1195cfiscsi_session_new(struct cfiscsi_softc *softc) 1196{ 1197 struct cfiscsi_session *cs; 1198 int error; 1199 1200 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1201 if (cs == NULL) { 1202 CFISCSI_WARN("malloc failed"); 1203 return (NULL); 1204 } 1205 cs->cs_ctl_initid = -1; 1206 1207 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1208 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1209 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1210 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1211#ifdef ICL_KERNEL_PROXY 1212 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1213#endif 1214 1215 cs->cs_conn = icl_conn_new(); 1216 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1217 cs->cs_conn->ic_error = cfiscsi_error_callback; 1218 cs->cs_conn->ic_prv0 = cs; 1219 1220 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1221 if (error != 0) { 1222 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1223 free(cs, M_CFISCSI); 1224 return (NULL); 1225 } 1226 1227 mtx_lock(&softc->lock); 1228 cs->cs_id = softc->last_session_id + 1; 1229 softc->last_session_id++; 1230 mtx_unlock(&softc->lock); 1231 1232 mtx_lock(&softc->lock); 1233 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1234 mtx_unlock(&softc->lock); 1235 1236 /* 1237 * Start pinging the initiator. 1238 */ 1239 callout_init(&cs->cs_callout, 1); 1240 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1241 1242 return (cs); 1243} 1244 1245static void 1246cfiscsi_session_delete(struct cfiscsi_session *cs) 1247{ 1248 struct cfiscsi_softc *softc; 1249 1250 softc = &cfiscsi_softc; 1251 1252 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1253 ("destroying session with outstanding CTL pdus")); 1254 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1255 ("destroying session with non-empty queue")); 1256 1257 cfiscsi_session_unregister_initiator(cs); 1258 if (cs->cs_target != NULL) 1259 cfiscsi_target_release(cs->cs_target); 1260 icl_conn_close(cs->cs_conn); 1261 icl_conn_free(cs->cs_conn); 1262 1263 mtx_lock(&softc->lock); 1264 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1265 mtx_unlock(&softc->lock); 1266 1267 free(cs, M_CFISCSI); 1268} 1269 1270int 1271cfiscsi_init(void) 1272{ 1273 struct cfiscsi_softc *softc; 1274 struct ctl_frontend *fe; 1275 int retval; 1276 1277 softc = &cfiscsi_softc; 1278 retval = 0; 1279 bzero(softc, sizeof(*softc)); 1280 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1281 1282#ifdef ICL_KERNEL_PROXY 1283 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1284#endif 1285 TAILQ_INIT(&softc->sessions); 1286 TAILQ_INIT(&softc->targets); 1287 1288 fe = &softc->fe; 1289 fe->port_type = CTL_PORT_ISCSI; 1290 /* XXX KDM what should the real number be here? */ 1291 fe->num_requested_ctl_io = 4096; 1292 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1293 fe->port_name = softc->port_name; 1294 fe->port_online = cfiscsi_online; 1295 fe->port_offline = cfiscsi_offline; 1296 fe->onoff_arg = softc; 1297 fe->targ_enable = cfiscsi_targ_enable; 1298 fe->targ_disable = cfiscsi_targ_disable; 1299 fe->lun_enable = cfiscsi_lun_enable; 1300 fe->lun_disable = cfiscsi_lun_disable; 1301 fe->targ_lun_arg = softc; 1302 fe->ioctl = cfiscsi_ioctl; 1303 fe->devid = cfiscsi_devid; 1304 fe->fe_datamove = cfiscsi_datamove; 1305 fe->fe_done = cfiscsi_done; 1306 1307 /* XXX KDM what should we report here? */ 1308 /* XXX These should probably be fetched from CTL. */ 1309 fe->max_targets = 1; 1310 fe->max_target_id = 15; 1311 1312 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1313 if (retval != 0) { 1314 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1315 retval); 1316 retval = 1; 1317 goto bailout; 1318 } 1319 1320 softc->max_initiators = fe->max_initiators; 1321 1322 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1323 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1324 UMA_ALIGN_PTR, 0); 1325 1326 return (0); 1327 1328bailout: 1329 return (retval); 1330} 1331 1332static int 1333cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1334{ 1335 1336 switch (what) { 1337 case MOD_LOAD: 1338 return (cfiscsi_init()); 1339 case MOD_UNLOAD: 1340 return (EBUSY); 1341 default: 1342 return (EOPNOTSUPP); 1343 } 1344} 1345 1346#ifdef ICL_KERNEL_PROXY 1347static void 1348cfiscsi_accept(struct socket *so) 1349{ 1350 struct cfiscsi_session *cs; 1351 1352 cs = cfiscsi_session_new(&cfiscsi_softc); 1353 if (cs == NULL) { 1354 CFISCSI_WARN("failed to create session"); 1355 return; 1356 } 1357 1358 icl_conn_handoff_sock(cs->cs_conn, so); 1359 cs->cs_waiting_for_ctld = true; 1360 cv_signal(&cfiscsi_softc.accept_cv); 1361} 1362#endif 1363 1364static void 1365cfiscsi_online(void *arg) 1366{ 1367 struct cfiscsi_softc *softc; 1368 1369 softc = (struct cfiscsi_softc *)arg; 1370 1371 softc->online = 1; 1372#ifdef ICL_KERNEL_PROXY 1373 if (softc->listener != NULL) 1374 icl_listen_free(softc->listener); 1375 softc->listener = icl_listen_new(cfiscsi_accept); 1376#endif 1377} 1378 1379static void 1380cfiscsi_offline(void *arg) 1381{ 1382 struct cfiscsi_softc *softc; 1383 struct cfiscsi_session *cs; 1384 1385 softc = (struct cfiscsi_softc *)arg; 1386 1387 softc->online = 0; 1388 1389 mtx_lock(&softc->lock); 1390 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1391 cfiscsi_session_terminate(cs); 1392 mtx_unlock(&softc->lock); 1393 1394#ifdef ICL_KERNEL_PROXY 1395 icl_listen_free(softc->listener); 1396 softc->listener = NULL; 1397#endif 1398} 1399 1400static int 1401cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1402{ 1403 1404 return (0); 1405} 1406 1407static int 1408cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1409{ 1410 1411 return (0); 1412} 1413 1414static void 1415cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1416{ 1417 struct cfiscsi_softc *softc; 1418 struct cfiscsi_session *cs; 1419 struct cfiscsi_target *ct; 1420 struct ctl_iscsi_handoff_params *cihp; 1421#ifndef ICL_KERNEL_PROXY 1422 int error; 1423#endif 1424 1425 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1426 softc = &cfiscsi_softc; 1427 1428 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1429 cihp->initiator_name, cihp->initiator_addr, 1430 cihp->target_name); 1431 1432 if (softc->online == 0) { 1433 ci->status = CTL_ISCSI_ERROR; 1434 snprintf(ci->error_str, sizeof(ci->error_str), 1435 "%s: port offline", __func__); 1436 return; 1437 } 1438 1439 ct = cfiscsi_target_find(softc, cihp->target_name); 1440 if (ct == NULL) { 1441 ci->status = CTL_ISCSI_ERROR; 1442 snprintf(ci->error_str, sizeof(ci->error_str), 1443 "%s: target not found", __func__); 1444 return; 1445 } 1446 1447#ifdef ICL_KERNEL_PROXY 1448 mtx_lock(&cfiscsi_softc.lock); 1449 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1450 if (cs->cs_id == cihp->socket) 1451 break; 1452 } 1453 if (cs == NULL) { 1454 mtx_unlock(&cfiscsi_softc.lock); 1455 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1456 ci->status = CTL_ISCSI_ERROR; 1457 return; 1458 } 1459 mtx_unlock(&cfiscsi_softc.lock); 1460#else 1461 cs = cfiscsi_session_new(softc); 1462 if (cs == NULL) { 1463 ci->status = CTL_ISCSI_ERROR; 1464 snprintf(ci->error_str, sizeof(ci->error_str), 1465 "%s: cfiscsi_session_new failed", __func__); 1466 cfiscsi_target_release(ct); 1467 return; 1468 } 1469#endif 1470 cs->cs_target = ct; 1471 1472 /* 1473 * First PDU of Full Feature phase has the same CmdSN as the last 1474 * PDU from the Login Phase received from the initiator. Thus, 1475 * the -1 below. 1476 */ 1477 cs->cs_portal_group_tag = cihp->portal_group_tag; 1478 cs->cs_cmdsn = cihp->cmdsn; 1479 cs->cs_statsn = cihp->statsn; 1480 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1481 cs->cs_max_burst_length = cihp->max_burst_length; 1482 cs->cs_immediate_data = !!cihp->immediate_data; 1483 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1484 cs->cs_conn->ic_header_crc32c = true; 1485 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1486 cs->cs_conn->ic_data_crc32c = true; 1487 1488 strlcpy(cs->cs_initiator_name, 1489 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1490 strlcpy(cs->cs_initiator_addr, 1491 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1492 strlcpy(cs->cs_initiator_alias, 1493 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1494 1495#ifdef ICL_KERNEL_PROXY 1496 cs->cs_login_phase = false; 1497#else 1498 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1499 if (error != 0) { 1500 cfiscsi_session_delete(cs); 1501 ci->status = CTL_ISCSI_ERROR; 1502 snprintf(ci->error_str, sizeof(ci->error_str), 1503 "%s: icl_conn_handoff failed with error %d", 1504 __func__, error); 1505 return; 1506 } 1507#endif 1508 1509 /* 1510 * Register initiator with CTL. 1511 */ 1512 cfiscsi_session_register_initiator(cs); 1513 1514#ifdef ICL_KERNEL_PROXY 1515 /* 1516 * First PDU of the Full Feature phase has likely already arrived. 1517 * We have to pick it up and execute properly. 1518 */ 1519 if (cs->cs_login_pdu != NULL) { 1520 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1521 cfiscsi_pdu_handle(cs->cs_login_pdu); 1522 cs->cs_login_pdu = NULL; 1523 } 1524#endif 1525 1526 ci->status = CTL_ISCSI_OK; 1527} 1528 1529static void 1530cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1531{ 1532 struct ctl_iscsi_list_params *cilp; 1533 struct cfiscsi_session *cs; 1534 struct cfiscsi_softc *softc; 1535 struct sbuf *sb; 1536 int error; 1537 1538 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1539 softc = &cfiscsi_softc; 1540 1541 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1542 if (sb == NULL) { 1543 ci->status = CTL_ISCSI_ERROR; 1544 snprintf(ci->error_str, sizeof(ci->error_str), 1545 "Unable to allocate %d bytes for iSCSI session list", 1546 cilp->alloc_len); 1547 return; 1548 } 1549 1550 sbuf_printf(sb, "<ctlislist>\n"); 1551 mtx_lock(&softc->lock); 1552 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1553#ifdef ICL_KERNEL_PROXY 1554 if (cs->cs_target == NULL) 1555 continue; 1556#endif 1557 error = sbuf_printf(sb, "<connection id=\"%d\">" 1558 "<initiator>%s</initiator>" 1559 "<initiator_addr>%s</initiator_addr>" 1560 "<initiator_alias>%s</initiator_alias>" 1561 "<target>%s</target>" 1562 "<target_alias>%s</target_alias>" 1563 "<header_digest>%s</header_digest>" 1564 "<data_digest>%s</data_digest>" 1565 "<max_data_segment_length>%zd</max_data_segment_length>" 1566 "<immediate_data>%d</immediate_data>" 1567 "<iser>%d</iser>" 1568 "</connection>\n", 1569 cs->cs_id, 1570 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1571 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1572 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1573 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1574 cs->cs_max_data_segment_length, 1575 cs->cs_immediate_data, 1576 cs->cs_conn->ic_iser); 1577 if (error != 0) 1578 break; 1579 } 1580 mtx_unlock(&softc->lock); 1581 error = sbuf_printf(sb, "</ctlislist>\n"); 1582 if (error != 0) { 1583 sbuf_delete(sb); 1584 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1585 snprintf(ci->error_str, sizeof(ci->error_str), 1586 "Out of space, %d bytes is too small", cilp->alloc_len); 1587 return; 1588 } 1589 sbuf_finish(sb); 1590 1591 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1592 cilp->fill_len = sbuf_len(sb) + 1; 1593 ci->status = CTL_ISCSI_OK; 1594 sbuf_delete(sb); 1595} 1596 1597static void 1598cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1599{ 1600 struct icl_pdu *response; 1601 struct iscsi_bhs_asynchronous_message *bhsam; 1602 struct ctl_iscsi_terminate_params *citp; 1603 struct cfiscsi_session *cs; 1604 struct cfiscsi_softc *softc; 1605 int found = 0; 1606 1607 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1608 softc = &cfiscsi_softc; 1609 1610 mtx_lock(&softc->lock); 1611 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1612 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1613 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1614 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1615 continue; 1616 1617 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1618 if (response == NULL) { 1619 /* 1620 * Oh well. Just terminate the connection. 1621 */ 1622 } else { 1623 bhsam = (struct iscsi_bhs_asynchronous_message *) 1624 response->ip_bhs; 1625 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1626 bhsam->bhsam_flags = 0x80; 1627 bhsam->bhsam_0xffffffff = 0xffffffff; 1628 bhsam->bhsam_async_event = 1629 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1630 cfiscsi_pdu_queue(response); 1631 } 1632 cfiscsi_session_terminate(cs); 1633 found++; 1634 } 1635 mtx_unlock(&softc->lock); 1636 1637 if (found == 0) { 1638 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1639 snprintf(ci->error_str, sizeof(ci->error_str), 1640 "No matching connections found"); 1641 return; 1642 } 1643 1644 ci->status = CTL_ISCSI_OK; 1645} 1646 1647static void 1648cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1649{ 1650 struct icl_pdu *response; 1651 struct iscsi_bhs_asynchronous_message *bhsam; 1652 struct ctl_iscsi_logout_params *cilp; 1653 struct cfiscsi_session *cs; 1654 struct cfiscsi_softc *softc; 1655 int found = 0; 1656 1657 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1658 softc = &cfiscsi_softc; 1659 1660 mtx_lock(&softc->lock); 1661 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1662 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1663 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1664 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1665 continue; 1666 1667 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1668 if (response == NULL) { 1669 ci->status = CTL_ISCSI_ERROR; 1670 snprintf(ci->error_str, sizeof(ci->error_str), 1671 "Unable to allocate memory"); 1672 mtx_unlock(&softc->lock); 1673 return; 1674 } 1675 bhsam = 1676 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1677 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1678 bhsam->bhsam_flags = 0x80; 1679 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1680 bhsam->bhsam_parameter3 = htons(10); 1681 cfiscsi_pdu_queue(response); 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 1696#ifdef ICL_KERNEL_PROXY 1697static void 1698cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1699{ 1700 struct ctl_iscsi_listen_params *cilp; 1701 struct sockaddr *sa; 1702 int error; 1703 1704 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1705 1706 if (cfiscsi_softc.listener == NULL) { 1707 CFISCSI_DEBUG("no listener"); 1708 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1709 ci->status = CTL_ISCSI_ERROR; 1710 return; 1711 } 1712 1713 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1714 if (error != 0) { 1715 CFISCSI_DEBUG("getsockaddr, error %d", error); 1716 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1717 ci->status = CTL_ISCSI_ERROR; 1718 return; 1719 } 1720 1721 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1722 cilp->socktype, cilp->protocol, sa); 1723 if (error != 0) { 1724 free(sa, M_SONAME); 1725 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1726 snprintf(ci->error_str, sizeof(ci->error_str), 1727 "icl_listen_add failed, error %d", error); 1728 ci->status = CTL_ISCSI_ERROR; 1729 return; 1730 } 1731 1732 ci->status = CTL_ISCSI_OK; 1733} 1734 1735static void 1736cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1737{ 1738 struct ctl_iscsi_accept_params *ciap; 1739 struct cfiscsi_session *cs; 1740 int error; 1741 1742 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1743 1744 mtx_lock(&cfiscsi_softc.lock); 1745 for (;;) { 1746 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1747 if (cs->cs_waiting_for_ctld) 1748 break; 1749 } 1750 if (cs != NULL) 1751 break; 1752 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1753 if (error != 0) { 1754 mtx_unlock(&cfiscsi_softc.lock); 1755 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1756 ci->status = CTL_ISCSI_ERROR; 1757 return; 1758 } 1759 } 1760 mtx_unlock(&cfiscsi_softc.lock); 1761 1762 cs->cs_waiting_for_ctld = false; 1763 cs->cs_login_phase = true; 1764 1765 ciap->connection_id = cs->cs_id; 1766 ci->status = CTL_ISCSI_OK; 1767} 1768 1769static void 1770cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1771{ 1772 struct ctl_iscsi_send_params *cisp; 1773 struct cfiscsi_session *cs; 1774 struct icl_pdu *ip; 1775 size_t datalen; 1776 void *data; 1777 int error; 1778 1779 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1780 1781 mtx_lock(&cfiscsi_softc.lock); 1782 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1783 if (cs->cs_id == cisp->connection_id) 1784 break; 1785 } 1786 if (cs == NULL) { 1787 mtx_unlock(&cfiscsi_softc.lock); 1788 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1789 ci->status = CTL_ISCSI_ERROR; 1790 return; 1791 } 1792 mtx_unlock(&cfiscsi_softc.lock); 1793 1794#if 0 1795 if (cs->cs_login_phase == false) 1796 return (EBUSY); 1797#endif 1798 1799 if (cs->cs_terminating) { 1800 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1801 ci->status = CTL_ISCSI_ERROR; 1802 return; 1803 } 1804 1805 datalen = cisp->data_segment_len; 1806 /* 1807 * XXX 1808 */ 1809 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1810 if (datalen > 65535) { 1811 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1812 ci->status = CTL_ISCSI_ERROR; 1813 return; 1814 } 1815 if (datalen > 0) { 1816 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1817 error = copyin(cisp->data_segment, data, datalen); 1818 if (error != 0) { 1819 free(data, M_CFISCSI); 1820 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1821 ci->status = CTL_ISCSI_ERROR; 1822 return; 1823 } 1824 } 1825 1826 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1827 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1828 if (datalen > 0) { 1829 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1830 free(data, M_CFISCSI); 1831 } 1832 icl_pdu_queue(ip); 1833 ci->status = CTL_ISCSI_OK; 1834} 1835 1836static void 1837cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1838{ 1839 struct ctl_iscsi_receive_params *cirp; 1840 struct cfiscsi_session *cs; 1841 struct icl_pdu *ip; 1842 void *data; 1843 1844 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1845 1846 mtx_lock(&cfiscsi_softc.lock); 1847 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1848 if (cs->cs_id == cirp->connection_id) 1849 break; 1850 } 1851 if (cs == NULL) { 1852 mtx_unlock(&cfiscsi_softc.lock); 1853 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1854 ci->status = CTL_ISCSI_ERROR; 1855 return; 1856 } 1857 mtx_unlock(&cfiscsi_softc.lock); 1858 1859#if 0 1860 if (is->is_login_phase == false) 1861 return (EBUSY); 1862#endif 1863 1864 CFISCSI_SESSION_LOCK(cs); 1865 while (cs->cs_login_pdu == NULL && 1866 cs->cs_terminating == false) 1867 cv_wait(&cs->cs_login_cv, &cs->cs_lock); 1868 if (cs->cs_terminating) { 1869 CFISCSI_SESSION_UNLOCK(cs); 1870 snprintf(ci->error_str, sizeof(ci->error_str), "connection terminating"); 1871 ci->status = CTL_ISCSI_ERROR; 1872 return; 1873 } 1874 ip = cs->cs_login_pdu; 1875 cs->cs_login_pdu = NULL; 1876 CFISCSI_SESSION_UNLOCK(cs); 1877 1878 if (ip->ip_data_len > cirp->data_segment_len) { 1879 icl_pdu_free(ip); 1880 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1881 ci->status = CTL_ISCSI_ERROR; 1882 return; 1883 } 1884 1885 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1886 if (ip->ip_data_len > 0) { 1887 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1888 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1889 copyout(data, cirp->data_segment, ip->ip_data_len); 1890 free(data, M_CFISCSI); 1891 } 1892 1893 icl_pdu_free(ip); 1894 ci->status = CTL_ISCSI_OK; 1895} 1896 1897static void 1898cfiscsi_ioctl_close(struct ctl_iscsi *ci) 1899{ 1900 /* 1901 * XXX 1902 */ 1903} 1904#endif /* !ICL_KERNEL_PROXY */ 1905 1906static int 1907cfiscsi_ioctl(struct cdev *dev, 1908 u_long cmd, caddr_t addr, int flag, struct thread *td) 1909{ 1910 struct ctl_iscsi *ci; 1911 1912 if (cmd != CTL_ISCSI) 1913 return (ENOTTY); 1914 1915 ci = (struct ctl_iscsi *)addr; 1916 switch (ci->type) { 1917 case CTL_ISCSI_HANDOFF: 1918 cfiscsi_ioctl_handoff(ci); 1919 break; 1920 case CTL_ISCSI_LIST: 1921 cfiscsi_ioctl_list(ci); 1922 break; 1923 case CTL_ISCSI_TERMINATE: 1924 cfiscsi_ioctl_terminate(ci); 1925 break; 1926 case CTL_ISCSI_LOGOUT: 1927 cfiscsi_ioctl_logout(ci); 1928 break; 1929#ifdef ICL_KERNEL_PROXY 1930 case CTL_ISCSI_LISTEN: 1931 cfiscsi_ioctl_listen(ci); 1932 break; 1933 case CTL_ISCSI_ACCEPT: 1934 cfiscsi_ioctl_accept(ci); 1935 break; 1936 case CTL_ISCSI_SEND: 1937 cfiscsi_ioctl_send(ci); 1938 break; 1939 case CTL_ISCSI_RECEIVE: 1940 cfiscsi_ioctl_receive(ci); 1941 break; 1942 case CTL_ISCSI_CLOSE: 1943 cfiscsi_ioctl_close(ci); 1944 break; 1945#endif /* ICL_KERNEL_PROXY */ 1946 default: 1947 ci->status = CTL_ISCSI_ERROR; 1948 snprintf(ci->error_str, sizeof(ci->error_str), 1949 "%s: invalid iSCSI request type %d", __func__, ci->type); 1950 break; 1951 } 1952 1953 return (0); 1954} 1955 1956static int 1957cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 1958{ 1959 struct cfiscsi_session *cs; 1960 struct scsi_vpd_device_id *devid_ptr; 1961 struct scsi_vpd_id_descriptor *desc, *desc1; 1962 struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */ 1963 struct scsi_vpd_id_t10 *t10id; 1964 struct ctl_lun *lun; 1965 const struct icl_pdu *request; 1966 size_t devid_len, wwpn_len; 1967 1968 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 1969 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 1970 cs = PDU_SESSION(request); 1971 1972 wwpn_len = strlen(cs->cs_target->ct_name); 1973 wwpn_len += strlen(",t,0x01"); 1974 wwpn_len += 1; /* '\0' */ 1975 if ((wwpn_len % 4) != 0) 1976 wwpn_len += (4 - (wwpn_len % 4)); 1977 1978 devid_len = sizeof(struct scsi_vpd_device_id) + 1979 sizeof(struct scsi_vpd_id_descriptor) + 1980 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 1981 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 1982 sizeof(struct scsi_vpd_id_descriptor) + 1983 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 1984 sizeof(struct scsi_vpd_id_descriptor) + 1985 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 1986 1987 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 1988 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 1989 ctsio->kern_sg_entries = 0; 1990 1991 if (devid_len < alloc_len) { 1992 ctsio->residual = alloc_len - devid_len; 1993 ctsio->kern_data_len = devid_len; 1994 ctsio->kern_total_len = devid_len; 1995 } else { 1996 ctsio->residual = 0; 1997 ctsio->kern_data_len = alloc_len; 1998 ctsio->kern_total_len = alloc_len; 1999 } 2000 ctsio->kern_data_resid = 0; 2001 ctsio->kern_rel_offset = 0; 2002 ctsio->kern_sg_entries = 0; 2003 2004 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2005 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2006 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2007 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 2008 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2009 wwpn_len); 2010 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2011 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2012 2013 if (lun != NULL) 2014 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2015 lun->be_lun->lun_type; 2016 else 2017 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2018 2019 devid_ptr->page_code = SVPD_DEVICE_ID; 2020 2021 scsi_ulto2b(devid_len - 4, devid_ptr->length); 2022 2023 /* 2024 * We're using a LUN association here. i.e., this device ID is a 2025 * per-LUN identifier. 2026 */ 2027 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2028 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2029 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 2030 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2031 2032 /* 2033 * If we've actually got a backend, copy the device id from the 2034 * per-LUN data. Otherwise, set it to all spaces. 2035 */ 2036 if (lun != NULL) { 2037 /* 2038 * Copy the backend's LUN ID. 2039 */ 2040 strncpy((char *)t10id->vendor_spec_id, 2041 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2042 } else { 2043 /* 2044 * No backend, set this to spaces. 2045 */ 2046 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2047 } 2048 2049 /* 2050 * desc1 is for the WWPN which is a port asscociation. 2051 */ 2052 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2053 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2054 SVPD_ID_TYPE_SCSI_NAME; 2055 desc1->length = wwpn_len; 2056 snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x", 2057 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2058 2059 /* 2060 * desc2 is for the Relative Target Port(type 4h) identifier 2061 */ 2062 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2063 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2064 SVPD_ID_TYPE_RELTARG; 2065 desc2->length = 4; 2066 desc2->identifier[3] = 1; 2067 2068 /* 2069 * desc3 is for the Target Port Group(type 5h) identifier 2070 */ 2071 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2072 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2073 SVPD_ID_TYPE_TPORTGRP; 2074 desc3->length = 4; 2075 desc3->identifier[3] = 1; 2076 2077 ctsio->scsi_status = SCSI_STATUS_OK; 2078 2079 ctsio->be_move_done = ctl_config_move_done; 2080 ctl_datamove((union ctl_io *)ctsio); 2081 2082 return (CTL_RETVAL_COMPLETE); 2083} 2084 2085static void 2086cfiscsi_target_hold(struct cfiscsi_target *ct) 2087{ 2088 2089 refcount_acquire(&ct->ct_refcount); 2090} 2091 2092static void 2093cfiscsi_target_release(struct cfiscsi_target *ct) 2094{ 2095 int old; 2096 struct cfiscsi_softc *softc; 2097 2098 softc = ct->ct_softc; 2099 2100 old = ct->ct_refcount; 2101 if (old > 1 && atomic_cmpset_int(&ct->ct_refcount, old, old - 1)) 2102 return; 2103 2104 mtx_lock(&softc->lock); 2105 if (refcount_release(&ct->ct_refcount)) { 2106 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2107 mtx_unlock(&softc->lock); 2108 free(ct, M_CFISCSI); 2109 2110 return; 2111 } 2112 mtx_unlock(&softc->lock); 2113} 2114 2115static struct cfiscsi_target * 2116cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2117{ 2118 struct cfiscsi_target *ct; 2119 2120 mtx_lock(&softc->lock); 2121 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2122 if (strcmp(name, ct->ct_name) != 0) 2123 continue; 2124 cfiscsi_target_hold(ct); 2125 mtx_unlock(&softc->lock); 2126 return (ct); 2127 } 2128 mtx_unlock(&softc->lock); 2129 2130 return (NULL); 2131} 2132 2133static struct cfiscsi_target * 2134cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2135 const char *alias) 2136{ 2137 struct cfiscsi_target *ct, *newct; 2138 int i; 2139 2140 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2141 return (NULL); 2142 2143 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2144 2145 mtx_lock(&softc->lock); 2146 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2147 if (strcmp(name, ct->ct_name) != 0) 2148 continue; 2149 cfiscsi_target_hold(ct); 2150 mtx_unlock(&softc->lock); 2151 free(newct, M_CFISCSI); 2152 return (ct); 2153 } 2154 2155 for (i = 0; i < CTL_MAX_LUNS; i++) 2156 newct->ct_luns[i] = -1; 2157 2158 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2159 if (alias != NULL) 2160 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2161 refcount_init(&newct->ct_refcount, 1); 2162 newct->ct_softc = softc; 2163 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2164 mtx_unlock(&softc->lock); 2165 2166 return (newct); 2167} 2168 2169/* 2170 * Takes LUN from the target space and returns LUN from the CTL space. 2171 */ 2172static uint32_t 2173cfiscsi_map_lun(void *arg, uint32_t lun) 2174{ 2175 struct cfiscsi_session *cs; 2176 2177 cs = arg; 2178 2179 if (lun >= CTL_MAX_LUNS) { 2180 CFISCSI_DEBUG("requested lun number %d is higher " 2181 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2182 return (0xffffffff); 2183 } 2184 2185 if (cs->cs_target->ct_luns[lun] < 0) 2186 return (0xffffffff); 2187 2188 return (cs->cs_target->ct_luns[lun]); 2189} 2190 2191static int 2192cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2193 unsigned long lun_id, unsigned long ctl_lun_id) 2194{ 2195 2196 if (lun_id >= CTL_MAX_LUNS) { 2197 CFISCSI_WARN("requested lun number %ld is higher " 2198 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2199 return (-1); 2200 } 2201 2202 if (ct->ct_luns[lun_id] >= 0) { 2203 /* 2204 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2205 * when the LUN is created, and a second time just before 2206 * the port is brought online; don't emit warnings 2207 * for that case. 2208 */ 2209 if (ct->ct_luns[lun_id] == ctl_lun_id) 2210 return (0); 2211 CFISCSI_WARN("lun %ld already allocated", lun_id); 2212 return (-1); 2213 } 2214 2215#if 0 2216 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2217 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2218#endif 2219 2220 ct->ct_luns[lun_id] = ctl_lun_id; 2221 cfiscsi_target_hold(ct); 2222 2223 return (0); 2224} 2225 2226static int 2227cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2228{ 2229 2230 if (ct->ct_luns[lun_id] < 0) { 2231 CFISCSI_WARN("lun %ld not allocated", lun_id); 2232 return (-1); 2233 } 2234 2235 ct->ct_luns[lun_id] = -1; 2236 cfiscsi_target_release(ct); 2237 2238 return (0); 2239} 2240 2241static int 2242cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2243{ 2244 struct cfiscsi_softc *softc; 2245 struct cfiscsi_target *ct; 2246 struct ctl_be_lun_option *opt; 2247 const char *target = NULL, *target_alias = NULL; 2248 const char *lun = NULL; 2249 unsigned long tmp; 2250 2251 softc = (struct cfiscsi_softc *)arg; 2252 2253 STAILQ_FOREACH(opt, 2254 &control_softc->ctl_luns[lun_id]->be_lun->options, links) { 2255 if (strcmp(opt->name, "cfiscsi_target") == 0) 2256 target = opt->value; 2257 else if (strcmp(opt->name, "cfiscsi_target_alias") == 0) 2258 target_alias = opt->value; 2259 else if (strcmp(opt->name, "cfiscsi_lun") == 0) 2260 lun = opt->value; 2261 } 2262 2263 if (target == NULL && lun == NULL) 2264 return (0); 2265 2266 if (target == NULL || lun == NULL) { 2267 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2268 "cfiscsi_lun, or the other way around; ignoring"); 2269 return (0); 2270 } 2271 2272 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2273 if (ct == NULL) { 2274 CFISCSI_WARN("failed to create target \"%s\"", target); 2275 return (0); 2276 } 2277 2278 tmp = strtoul(lun, NULL, 10); 2279 cfiscsi_target_set_lun(ct, tmp, lun_id); 2280 return (0); 2281} 2282 2283static int 2284cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2285{ 2286 struct cfiscsi_softc *softc; 2287 struct cfiscsi_target *ct; 2288 int i; 2289 2290 softc = (struct cfiscsi_softc *)arg; 2291 2292 mtx_lock(&softc->lock); 2293 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2294 for (i = 0; i < CTL_MAX_LUNS; i++) { 2295 if (ct->ct_luns[i] < 0) 2296 continue; 2297 if (ct->ct_luns[i] != lun_id) 2298 continue; 2299 cfiscsi_target_unset_lun(ct, i); 2300 break; 2301 } 2302 } 2303 mtx_unlock(&softc->lock); 2304 return (0); 2305} 2306 2307static void 2308cfiscsi_datamove_in(union ctl_io *io) 2309{ 2310 struct cfiscsi_session *cs; 2311 struct icl_pdu *request, *response; 2312 const struct iscsi_bhs_scsi_command *bhssc; 2313 struct iscsi_bhs_data_in *bhsdi; 2314 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2315 size_t copy_len, len, off; 2316 const char *addr; 2317 int ctl_sg_count, error, i; 2318 2319 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2320 cs = PDU_SESSION(request); 2321 2322 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2323 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2324 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2325 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2326 2327 if (io->scsiio.kern_sg_entries > 0) { 2328 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2329 ctl_sg_count = io->scsiio.kern_sg_entries; 2330 } else { 2331 ctl_sglist = &ctl_sg_entry; 2332 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2333 ctl_sglist->len = io->scsiio.kern_data_len; 2334 ctl_sg_count = 1; 2335 } 2336 2337 /* 2338 * We need to record it so that we can properly report 2339 * underflow/underflow. 2340 */ 2341 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2342 2343#if 0 2344 if (ctl_sg_count > 1) 2345 CFISCSI_SESSION_DEBUG(cs, "ctl_sg_count = %d", ctl_sg_count); 2346#endif 2347 2348 /* 2349 * This is the offset within the current SCSI command; 2350 * i.e. for the first call of datamove(), it will be 0, 2351 * and for subsequent ones it will be the sum of lengths 2352 * of previous ones. 2353 */ 2354 off = htonl(io->scsiio.kern_rel_offset); 2355 if (off > 1) 2356 CFISCSI_SESSION_DEBUG(cs, "off = %zd", off); 2357 2358 i = 0; 2359 addr = NULL; 2360 len = 0; 2361 response = NULL; 2362 bhsdi = NULL; 2363 for (;;) { 2364 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2365 if (response == NULL) { 2366 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2367 if (response == NULL) { 2368 CFISCSI_SESSION_WARN(cs, "failed to " 2369 "allocate memory; dropping connection"); 2370 ctl_set_busy(&io->scsiio); 2371 io->scsiio.be_move_done(io); 2372 cfiscsi_session_terminate(cs); 2373 return; 2374 } 2375 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2376 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2377 bhsdi->bhsdi_initiator_task_tag = 2378 bhssc->bhssc_initiator_task_tag; 2379 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2380 PDU_EXPDATASN(request)++; 2381 bhsdi->bhsdi_buffer_offset = htonl(off); 2382 } 2383 2384 if (len == 0) { 2385 addr = ctl_sglist[i].addr; 2386 len = ctl_sglist[i].len; 2387 KASSERT(len > 0, ("len <= 0")); 2388 } 2389 2390 copy_len = len; 2391 if (response->ip_data_len + copy_len > 2392 cs->cs_max_data_segment_length) 2393 copy_len = cs->cs_max_data_segment_length - 2394 response->ip_data_len; 2395 KASSERT(copy_len <= len, ("copy_len > len")); 2396 error = icl_pdu_append_data(response, addr, copy_len, M_NOWAIT); 2397 if (error != 0) { 2398 CFISCSI_SESSION_WARN(cs, "failed to " 2399 "allocate memory; dropping connection"); 2400 icl_pdu_free(response); 2401 ctl_set_busy(&io->scsiio); 2402 io->scsiio.be_move_done(io); 2403 cfiscsi_session_terminate(cs); 2404 return; 2405 } 2406 addr += copy_len; 2407 len -= copy_len; 2408 off += copy_len; 2409 io->scsiio.ext_data_filled += copy_len; 2410 2411 if (len == 0) { 2412 /* 2413 * End of scatter-gather segment; 2414 * proceed to the next one... 2415 */ 2416 if (i == ctl_sg_count - 1) { 2417 /* 2418 * ... unless this was the last one. 2419 */ 2420 break; 2421 } 2422 i++; 2423 } 2424 2425 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2426 /* 2427 * Can't stuff more data into the current PDU; 2428 * queue it. Note that's not enough to check 2429 * for kern_data_resid == 0 instead; there 2430 * may be several Data-In PDUs for the final 2431 * call to cfiscsi_datamove(), and we want 2432 * to set the F flag only on the last of them. 2433 */ 2434 if (off == io->scsiio.kern_total_len) 2435 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2436 KASSERT(response->ip_data_len > 0, 2437 ("sending empty Data-In")); 2438 cfiscsi_pdu_queue(response); 2439 response = NULL; 2440 bhsdi = NULL; 2441 } 2442 } 2443 KASSERT(i == ctl_sg_count - 1, ("missed SG segment")); 2444 KASSERT(len == 0, ("missed data from SG segment")); 2445 if (response != NULL) { 2446 if (off == io->scsiio.kern_total_len) { 2447 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2448 } else { 2449 CFISCSI_SESSION_DEBUG(cs, "not setting the F flag; " 2450 "have %zd, need %zd", off, 2451 (size_t)io->scsiio.kern_total_len); 2452 } 2453 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2454 cfiscsi_pdu_queue(response); 2455 } 2456 2457 io->scsiio.be_move_done(io); 2458} 2459 2460static void 2461cfiscsi_datamove_out(union ctl_io *io) 2462{ 2463 struct cfiscsi_session *cs; 2464 struct icl_pdu *request, *response; 2465 const struct iscsi_bhs_scsi_command *bhssc; 2466 struct iscsi_bhs_r2t *bhsr2t; 2467 struct cfiscsi_data_wait *cdw; 2468 uint32_t target_transfer_tag; 2469 bool done; 2470 2471 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2472 cs = PDU_SESSION(request); 2473 2474 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2475 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2476 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2477 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2478 2479 /* 2480 * We need to record it so that we can properly report 2481 * underflow/underflow. 2482 */ 2483 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2484 2485 CFISCSI_SESSION_LOCK(cs); 2486 target_transfer_tag = cs->cs_target_transfer_tag; 2487 cs->cs_target_transfer_tag++; 2488 CFISCSI_SESSION_UNLOCK(cs); 2489 2490#if 0 2491 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2492 "task tag 0x%x, target transfer tag 0x%x", 2493 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2494#endif 2495 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2496 if (cdw == NULL) { 2497 CFISCSI_SESSION_WARN(cs, "failed to " 2498 "allocate memory; dropping connection"); 2499 ctl_set_busy(&io->scsiio); 2500 io->scsiio.be_move_done(io); 2501 cfiscsi_session_terminate(cs); 2502 return; 2503 } 2504 cdw->cdw_ctl_io = io; 2505 cdw->cdw_target_transfer_tag = htonl(target_transfer_tag); 2506 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2507 2508 if (cs->cs_immediate_data && icl_pdu_data_segment_length(request) > 0) { 2509 done = cfiscsi_handle_data_segment(request, cdw); 2510 if (done) { 2511 uma_zfree(cfiscsi_data_wait_zone, cdw); 2512 io->scsiio.be_move_done(io); 2513 return; 2514 } 2515 2516#if 0 2517 if (io->scsiio.ext_data_filled != 0) 2518 CFISCSI_SESSION_DEBUG(cs, "got %zd bytes of immediate data, need %zd", 2519 io->scsiio.ext_data_filled, io->scsiio.kern_data_len); 2520#endif 2521 } 2522 2523 CFISCSI_SESSION_LOCK(cs); 2524 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2525 CFISCSI_SESSION_UNLOCK(cs); 2526 2527 /* 2528 * XXX: We should limit the number of outstanding R2T PDUs 2529 * per task to MaxOutstandingR2T. 2530 */ 2531 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2532 if (response == NULL) { 2533 CFISCSI_SESSION_WARN(cs, "failed to " 2534 "allocate memory; dropping connection"); 2535 ctl_set_busy(&io->scsiio); 2536 io->scsiio.be_move_done(io); 2537 cfiscsi_session_terminate(cs); 2538 return; 2539 } 2540 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2541 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2542 bhsr2t->bhsr2t_flags = 0x80; 2543 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2544 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2545 bhsr2t->bhsr2t_target_transfer_tag = htonl(target_transfer_tag); 2546 /* 2547 * XXX: Here we assume that cfiscsi_datamove() won't ever 2548 * be running concurrently on several CPUs for a given 2549 * command. 2550 */ 2551 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2552 PDU_R2TSN(request)++; 2553 /* 2554 * This is the offset within the current SCSI command; 2555 * i.e. for the first call of datamove(), it will be 0, 2556 * and for subsequent ones it will be the sum of lengths 2557 * of previous ones. 2558 * 2559 * The ext_data_filled is to account for unsolicited 2560 * (immediate) data that might have already arrived. 2561 */ 2562 bhsr2t->bhsr2t_buffer_offset = 2563 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2564 /* 2565 * This is the total length (sum of S/G lengths) this call 2566 * to cfiscsi_datamove() is supposed to handle. 2567 * 2568 * XXX: Limit it to MaxBurstLength. 2569 */ 2570 bhsr2t->bhsr2t_desired_data_transfer_length = 2571 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2572 cfiscsi_pdu_queue(response); 2573} 2574 2575static void 2576cfiscsi_datamove(union ctl_io *io) 2577{ 2578 2579 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2580 cfiscsi_datamove_in(io); 2581 else 2582 cfiscsi_datamove_out(io); 2583} 2584 2585static void 2586cfiscsi_scsi_command_done(union ctl_io *io) 2587{ 2588 struct icl_pdu *request, *response; 2589 struct iscsi_bhs_scsi_command *bhssc; 2590 struct iscsi_bhs_scsi_response *bhssr; 2591#ifdef DIAGNOSTIC 2592 struct cfiscsi_data_wait *cdw; 2593#endif 2594 struct cfiscsi_session *cs; 2595 uint16_t sense_length; 2596 2597 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2598 cs = PDU_SESSION(request); 2599 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2600 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2601 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2602 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2603 2604 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2605 // bhssc->bhssc_initiator_task_tag); 2606 2607#ifdef DIAGNOSTIC 2608 CFISCSI_SESSION_LOCK(cs); 2609 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2610 KASSERT(bhssc->bhssc_initiator_task_tag != 2611 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2612 CFISCSI_SESSION_UNLOCK(cs); 2613#endif 2614 2615 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2616 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2617 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2618 bhssr->bhssr_flags = 0x80; 2619 /* 2620 * XXX: We don't deal with bidirectional under/overflows; 2621 * does anything actually support those? 2622 */ 2623 if (PDU_TOTAL_TRANSFER_LEN(request) < 2624 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2625 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2626 bhssr->bhssr_residual_count = 2627 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2628 PDU_TOTAL_TRANSFER_LEN(request)); 2629 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2630 // ntohl(bhssr->bhssr_residual_count)); 2631 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2632 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2633 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2634 bhssr->bhssr_residual_count = 2635 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2636 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2637 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2638 // ntohl(bhssr->bhssr_residual_count)); 2639 } 2640 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2641 bhssr->bhssr_status = io->scsiio.scsi_status; 2642 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2643 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2644 2645 if (io->scsiio.sense_len > 0) { 2646#if 0 2647 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2648 io->scsiio.sense_len); 2649#endif 2650 sense_length = htons(io->scsiio.sense_len); 2651 icl_pdu_append_data(response, 2652 &sense_length, sizeof(sense_length), M_WAITOK); 2653 icl_pdu_append_data(response, 2654 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2655 } 2656 2657 ctl_free_io(io); 2658 icl_pdu_free(request); 2659 cfiscsi_pdu_queue(response); 2660} 2661 2662static void 2663cfiscsi_task_management_done(union ctl_io *io) 2664{ 2665 struct icl_pdu *request, *response; 2666 struct iscsi_bhs_task_management_request *bhstmr; 2667 struct iscsi_bhs_task_management_response *bhstmr2; 2668 struct cfiscsi_data_wait *cdw, *tmpcdw; 2669 struct cfiscsi_session *cs; 2670 2671 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2672 cs = PDU_SESSION(request); 2673 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2674 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2675 ISCSI_BHS_OPCODE_TASK_REQUEST, 2676 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2677 2678#if 0 2679 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2680 bhstmr->bhstmr_initiator_task_tag, 2681 bhstmr->bhstmr_referenced_task_tag); 2682#endif 2683 2684 if ((bhstmr->bhstmr_function & ~0x80) == 2685 BHSTMR_FUNCTION_ABORT_TASK) { 2686 /* 2687 * Make sure we no longer wait for Data-Out for this command. 2688 */ 2689 CFISCSI_SESSION_LOCK(cs); 2690 TAILQ_FOREACH_SAFE(cdw, 2691 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2692 if (bhstmr->bhstmr_referenced_task_tag != 2693 cdw->cdw_initiator_task_tag) 2694 continue; 2695 2696#if 0 2697 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2698 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2699#endif 2700 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2701 cdw, cdw_next); 2702 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2703 uma_zfree(cfiscsi_data_wait_zone, cdw); 2704 } 2705 CFISCSI_SESSION_UNLOCK(cs); 2706 } 2707 2708 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2709 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2710 response->ip_bhs; 2711 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2712 bhstmr2->bhstmr_flags = 0x80; 2713 if (io->io_hdr.status == CTL_SUCCESS) { 2714 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2715 } else { 2716 /* 2717 * XXX: How to figure out what exactly went wrong? iSCSI spec 2718 * expects us to provide detailed error, e.g. "Task does 2719 * not exist" or "LUN does not exist". 2720 */ 2721 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2722 bhstmr2->bhstmr_response = 2723 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2724 } 2725 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2726 2727 ctl_free_io(io); 2728 icl_pdu_free(request); 2729 cfiscsi_pdu_queue(response); 2730} 2731 2732static void 2733cfiscsi_done(union ctl_io *io) 2734{ 2735 struct icl_pdu *request; 2736 struct cfiscsi_session *cs; 2737 2738 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2739 ("invalid CTL status %#x", io->io_hdr.status)); 2740 2741 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2742 if (request == NULL) { 2743 /* 2744 * Implicit task termination has just completed; nothing to do. 2745 */ 2746 return; 2747 } 2748 2749 cs = PDU_SESSION(request); 2750 refcount_release(&cs->cs_outstanding_ctl_pdus); 2751 2752 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2753 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2754 cfiscsi_scsi_command_done(io); 2755 break; 2756 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2757 cfiscsi_task_management_done(io); 2758 break; 2759 default: 2760 panic("cfiscsi_done called with wrong opcode 0x%x", 2761 request->ip_bhs->bhs_opcode); 2762 } 2763} 2764