ctl_frontend_iscsi.c revision 265508
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 265508 2014-05-07 07:31:25Z trasz $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 265508 2014-05-07 07:31:25Z trasz $"); 38 39#include <sys/param.h> 40#include <sys/capability.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include "../../dev/iscsi/icl.h" 71#include "../../dev/iscsi/iscsi_proto.h" 72#include "ctl_frontend_iscsi.h" 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 3; 88TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95static int login_timeout = 60; 96TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99static int maxcmdsn_delta = 256; 100TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105#define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113#define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130#define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145#define PDU_EXPDATASN(X) (X)->ip_prv0 146#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147#define PDU_R2TSN(X) (X)->ip_prv2 148 149int cfiscsi_init(void); 150static void cfiscsi_online(void *arg); 151static void cfiscsi_offline(void *arg); 152static int cfiscsi_targ_enable(void *arg, struct ctl_id targ_id); 153static int cfiscsi_targ_disable(void *arg, struct ctl_id targ_id); 154static int cfiscsi_lun_enable(void *arg, 155 struct ctl_id target_id, int lun_id); 156static int cfiscsi_lun_disable(void *arg, 157 struct ctl_id target_id, int lun_id); 158static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160static int cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len); 161static void cfiscsi_datamove(union ctl_io *io); 162static void cfiscsi_done(union ctl_io *io); 163static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun); 164static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 165static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 168static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 169static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 170static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 171static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 172 *softc, const char *name); 173static void cfiscsi_target_release(struct cfiscsi_target *ct); 174static void cfiscsi_session_delete(struct cfiscsi_session *cs); 175 176static struct cfiscsi_softc cfiscsi_softc; 177extern struct ctl_softc *control_softc; 178 179static int cfiscsi_module_event_handler(module_t, int /*modeventtype_t*/, void *); 180 181static moduledata_t cfiscsi_moduledata = { 182 "ctlcfiscsi", 183 cfiscsi_module_event_handler, 184 NULL 185}; 186 187DECLARE_MODULE(ctlcfiscsi, cfiscsi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH); 188MODULE_VERSION(ctlcfiscsi, 1); 189MODULE_DEPEND(ctlcfiscsi, ctl, 1, 1, 1); 190MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 191 192static struct icl_pdu * 193cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 194{ 195 196 return (icl_pdu_new_bhs(request->ip_conn, flags)); 197} 198 199static bool 200cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 201{ 202 const struct iscsi_bhs_scsi_command *bhssc; 203 struct cfiscsi_session *cs; 204 uint32_t cmdsn, expstatsn; 205 206 cs = PDU_SESSION(request); 207 208 /* 209 * Every incoming PDU - not just NOP-Out - resets the ping timer. 210 * The purpose of the timeout is to reset the connection when it stalls; 211 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 212 * in some queue. 213 * 214 * XXX: Locking? 215 */ 216 cs->cs_timeout = 0; 217 218 /* 219 * Data-Out PDUs don't contain CmdSN. 220 */ 221 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 222 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 223 return (false); 224 225 /* 226 * We're only using fields common for all the request 227 * (initiator -> target) PDUs. 228 */ 229 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 230 cmdsn = ntohl(bhssc->bhssc_cmdsn); 231 expstatsn = ntohl(bhssc->bhssc_expstatsn); 232 233 CFISCSI_SESSION_LOCK(cs); 234#if 0 235 if (expstatsn != cs->cs_statsn) { 236 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 237 "while current StatSN is %d", expstatsn, 238 cs->cs_statsn); 239 } 240#endif 241 242 /* 243 * The target MUST silently ignore any non-immediate command outside 244 * of this range. 245 */ 246 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 247 CFISCSI_SESSION_UNLOCK(cs); 248 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 249 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 250 return (true); 251 } 252 253 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 254 cs->cs_cmdsn++; 255 256 CFISCSI_SESSION_UNLOCK(cs); 257 258 return (false); 259} 260 261static void 262cfiscsi_pdu_handle(struct icl_pdu *request) 263{ 264 struct cfiscsi_session *cs; 265 bool ignore; 266 267 cs = PDU_SESSION(request); 268 269 ignore = cfiscsi_pdu_update_cmdsn(request); 270 if (ignore) { 271 icl_pdu_free(request); 272 return; 273 } 274 275 /* 276 * Handle the PDU; this includes e.g. receiving the remaining 277 * part of PDU and submitting the SCSI command to CTL 278 * or queueing a reply. The handling routine is responsible 279 * for freeing the PDU when it's no longer needed. 280 */ 281 switch (request->ip_bhs->bhs_opcode & 282 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 283 case ISCSI_BHS_OPCODE_NOP_OUT: 284 cfiscsi_pdu_handle_nop_out(request); 285 break; 286 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 287 cfiscsi_pdu_handle_scsi_command(request); 288 break; 289 case ISCSI_BHS_OPCODE_TASK_REQUEST: 290 cfiscsi_pdu_handle_task_request(request); 291 break; 292 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 293 cfiscsi_pdu_handle_data_out(request); 294 break; 295 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 296 cfiscsi_pdu_handle_logout_request(request); 297 break; 298 default: 299 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 300 "opcode 0x%x; dropping connection", 301 request->ip_bhs->bhs_opcode); 302 icl_pdu_free(request); 303 cfiscsi_session_terminate(cs); 304 } 305 306} 307 308static void 309cfiscsi_receive_callback(struct icl_pdu *request) 310{ 311 struct cfiscsi_session *cs; 312 313 cs = PDU_SESSION(request); 314 315#ifdef ICL_KERNEL_PROXY 316 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 317 if (cs->cs_login_pdu == NULL) 318 cs->cs_login_pdu = request; 319 else 320 icl_pdu_free(request); 321 cv_signal(&cs->cs_login_cv); 322 return; 323 } 324#endif 325 326 cfiscsi_pdu_handle(request); 327} 328 329static void 330cfiscsi_error_callback(struct icl_conn *ic) 331{ 332 struct cfiscsi_session *cs; 333 334 cs = CONN_SESSION(ic); 335 336 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 337 cfiscsi_session_terminate(cs); 338} 339 340static int 341cfiscsi_pdu_prepare(struct icl_pdu *response) 342{ 343 struct cfiscsi_session *cs; 344 struct iscsi_bhs_scsi_response *bhssr; 345 bool advance_statsn = true; 346 347 cs = PDU_SESSION(response); 348 349 CFISCSI_SESSION_LOCK_ASSERT(cs); 350 351 /* 352 * We're only using fields common for all the response 353 * (target -> initiator) PDUs. 354 */ 355 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 356 357 /* 358 * 10.8.3: "The StatSN for this connection is not advanced 359 * after this PDU is sent." 360 */ 361 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 362 advance_statsn = false; 363 364 /* 365 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 366 * StatSN for the connection is not advanced after this PDU is sent." 367 */ 368 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 369 bhssr->bhssr_initiator_task_tag == 0xffffffff) 370 advance_statsn = false; 371 372 /* 373 * See the comment below - StatSN is not meaningful and must 374 * not be advanced. 375 */ 376 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 377 advance_statsn = false; 378 379 /* 380 * 10.7.3: "The fields StatSN, Status, and Residual Count 381 * only have meaningful content if the S bit is set to 1." 382 */ 383 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 384 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 385 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 386 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 387 388 if (advance_statsn) 389 cs->cs_statsn++; 390 391 return (0); 392} 393 394static void 395cfiscsi_pdu_queue(struct icl_pdu *response) 396{ 397 struct cfiscsi_session *cs; 398 399 cs = PDU_SESSION(response); 400 401 CFISCSI_SESSION_LOCK(cs); 402 cfiscsi_pdu_prepare(response); 403 icl_pdu_queue(response); 404 CFISCSI_SESSION_UNLOCK(cs); 405} 406 407static uint32_t 408cfiscsi_decode_lun(uint64_t encoded) 409{ 410 uint8_t lun[8]; 411 uint32_t result; 412 413 /* 414 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 415 * but is in fact an evil, multidimensional structure defined 416 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 417 */ 418 memcpy(lun, &encoded, sizeof(lun)); 419 switch (lun[0] & 0xC0) { 420 case 0x00: 421 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 422 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 423 CFISCSI_WARN("malformed LUN " 424 "(peripheral device addressing method): 0x%jx", 425 (uintmax_t)encoded); 426 result = 0xffffffff; 427 break; 428 } 429 result = lun[1]; 430 break; 431 case 0x40: 432 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 433 lun[6] != 0 || lun[7] != 0) { 434 CFISCSI_WARN("malformed LUN " 435 "(flat address space addressing method): 0x%jx", 436 (uintmax_t)encoded); 437 result = 0xffffffff; 438 break; 439 } 440 result = ((lun[0] & 0x3f) << 8) + lun[1]; 441 break; 442 case 0xC0: 443 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 444 lun[6] != 0 || lun[7] != 0) { 445 CFISCSI_WARN("malformed LUN (extended flat " 446 "address space addressing method): 0x%jx", 447 (uintmax_t)encoded); 448 result = 0xffffffff; 449 break; 450 } 451 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 452 default: 453 CFISCSI_WARN("unsupported LUN format 0x%jx", 454 (uintmax_t)encoded); 455 result = 0xffffffff; 456 break; 457 } 458 459 return (result); 460} 461 462static void 463cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 464{ 465 struct cfiscsi_session *cs; 466 struct iscsi_bhs_nop_out *bhsno; 467 struct iscsi_bhs_nop_in *bhsni; 468 struct icl_pdu *response; 469 void *data = NULL; 470 size_t datasize; 471 int error; 472 473 cs = PDU_SESSION(request); 474 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 475 476 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 477 /* 478 * Nothing to do, iscsi_pdu_update_statsn() already 479 * zeroed the timeout. 480 */ 481 icl_pdu_free(request); 482 return; 483 } 484 485 datasize = icl_pdu_data_segment_length(request); 486 if (datasize > 0) { 487 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 488 if (data == NULL) { 489 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 490 "dropping connection"); 491 icl_pdu_free(request); 492 cfiscsi_session_terminate(cs); 493 return; 494 } 495 icl_pdu_get_data(request, 0, data, datasize); 496 } 497 498 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 499 if (response == NULL) { 500 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 501 "droppping connection"); 502 free(data, M_CFISCSI); 503 icl_pdu_free(request); 504 cfiscsi_session_terminate(cs); 505 return; 506 } 507 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 508 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 509 bhsni->bhsni_flags = 0x80; 510 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 511 bhsni->bhsni_target_transfer_tag = 0xffffffff; 512 if (datasize > 0) { 513 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 514 if (error != 0) { 515 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 516 "dropping connection"); 517 free(data, M_CFISCSI); 518 icl_pdu_free(request); 519 icl_pdu_free(response); 520 cfiscsi_session_terminate(cs); 521 return; 522 } 523 free(data, M_CFISCSI); 524 } 525 526 icl_pdu_free(request); 527 cfiscsi_pdu_queue(response); 528} 529 530static void 531cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 532{ 533 struct iscsi_bhs_scsi_command *bhssc; 534 struct cfiscsi_session *cs; 535 union ctl_io *io; 536 int error; 537 538 cs = PDU_SESSION(request); 539 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 540 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 541 // bhssc->bhssc_initiator_task_tag); 542 543 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 544 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 545 "ImmediateData=No; dropping connection"); 546 icl_pdu_free(request); 547 cfiscsi_session_terminate(cs); 548 return; 549 } 550 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 551 if (io == NULL) { 552 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 553 "dropping connection"); 554 icl_pdu_free(request); 555 cfiscsi_session_terminate(cs); 556 return; 557 } 558 ctl_zero_io(io); 559 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 560 io->io_hdr.io_type = CTL_IO_SCSI; 561 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 562 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 563 io->io_hdr.nexus.targ_target.id = 0; 564 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 565 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 566 io->io_hdr.nexus.lun_map_arg = cs; 567 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 568 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 569 case BHSSC_FLAGS_ATTR_UNTAGGED: 570 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 571 break; 572 case BHSSC_FLAGS_ATTR_SIMPLE: 573 io->scsiio.tag_type = CTL_TAG_SIMPLE; 574 break; 575 case BHSSC_FLAGS_ATTR_ORDERED: 576 io->scsiio.tag_type = CTL_TAG_ORDERED; 577 break; 578 case BHSSC_FLAGS_ATTR_HOQ: 579 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 580 break; 581 case BHSSC_FLAGS_ATTR_ACA: 582 io->scsiio.tag_type = CTL_TAG_ACA; 583 break; 584 default: 585 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 586 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 587 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 588 break; 589 } 590 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 591 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 592 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 593 error = ctl_queue(io); 594 if (error != CTL_RETVAL_COMPLETE) { 595 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 596 "dropping connection", error); 597 ctl_free_io(io); 598 refcount_release(&cs->cs_outstanding_ctl_pdus); 599 icl_pdu_free(request); 600 cfiscsi_session_terminate(cs); 601 } 602} 603 604static void 605cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 606{ 607 struct iscsi_bhs_task_management_request *bhstmr; 608 struct iscsi_bhs_task_management_response *bhstmr2; 609 struct icl_pdu *response; 610 struct cfiscsi_session *cs; 611 union ctl_io *io; 612 int error; 613 614 cs = PDU_SESSION(request); 615 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 616 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 617 if (io == NULL) { 618 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 619 "dropping connection"); 620 icl_pdu_free(request); 621 cfiscsi_session_terminate(cs); 622 return; 623 } 624 ctl_zero_io(io); 625 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 626 io->io_hdr.io_type = CTL_IO_TASK; 627 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 628 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 629 io->io_hdr.nexus.targ_target.id = 0; 630 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 631 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 632 io->io_hdr.nexus.lun_map_arg = cs; 633 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 634 635 switch (bhstmr->bhstmr_function & ~0x80) { 636 case BHSTMR_FUNCTION_ABORT_TASK: 637#if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 639#endif 640 io->taskio.task_action = CTL_TASK_ABORT_TASK; 641 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 642 break; 643 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 644#if 0 645 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 646#endif 647 io->taskio.task_action = CTL_TASK_LUN_RESET; 648 break; 649 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 650#if 0 651 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 652#endif 653 io->taskio.task_action = CTL_TASK_TARGET_RESET; 654 break; 655 default: 656 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 657 bhstmr->bhstmr_function & ~0x80); 658 ctl_free_io(io); 659 660 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 661 if (response == NULL) { 662 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 663 "dropping connection"); 664 icl_pdu_free(request); 665 cfiscsi_session_terminate(cs); 666 return; 667 } 668 bhstmr2 = (struct iscsi_bhs_task_management_response *) 669 response->ip_bhs; 670 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 671 bhstmr2->bhstmr_flags = 0x80; 672 bhstmr2->bhstmr_response = 673 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 674 bhstmr2->bhstmr_initiator_task_tag = 675 bhstmr->bhstmr_initiator_task_tag; 676 icl_pdu_free(request); 677 cfiscsi_pdu_queue(response); 678 return; 679 } 680 681 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 682 error = ctl_queue(io); 683 if (error != CTL_RETVAL_COMPLETE) { 684 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 685 "dropping connection", error); 686 ctl_free_io(io); 687 refcount_release(&cs->cs_outstanding_ctl_pdus); 688 icl_pdu_free(request); 689 cfiscsi_session_terminate(cs); 690 } 691} 692 693static bool 694cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 695{ 696 struct iscsi_bhs_data_out *bhsdo; 697 struct cfiscsi_session *cs; 698 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 699 size_t copy_len, len, off, buffer_offset; 700 int ctl_sg_count; 701 union ctl_io *io; 702 703 cs = PDU_SESSION(request); 704 705 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 706 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 707 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 708 ISCSI_BHS_OPCODE_SCSI_COMMAND, 709 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 710 711 /* 712 * We're only using fields common for Data Out and SCSI Command PDUs. 713 */ 714 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 715 716 io = cdw->cdw_ctl_io; 717 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 718 ("CTL_FLAG_DATA_IN")); 719 720#if 0 721 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 722 request->ip_data_len, io->scsiio.kern_total_len); 723#endif 724 725 if (io->scsiio.kern_sg_entries > 0) { 726 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 727 ctl_sg_count = io->scsiio.kern_sg_entries; 728 } else { 729 ctl_sglist = &ctl_sg_entry; 730 ctl_sglist->addr = io->scsiio.kern_data_ptr; 731 ctl_sglist->len = io->scsiio.kern_data_len; 732 ctl_sg_count = 1; 733 } 734 735 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 736 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 737 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 738 else 739 buffer_offset = 0; 740 741 /* 742 * Make sure the offset, as sent by the initiator, matches the offset 743 * we're supposed to be at in the scatter-gather list. 744 */ 745 if (buffer_offset != io->scsiio.ext_data_filled) { 746 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 747 "expected %zd", buffer_offset, 748 (size_t)io->scsiio.ext_data_filled); 749 cfiscsi_session_terminate(cs); 750 return (true); 751 } 752 753 /* 754 * This is the offset within the PDU data segment, as opposed 755 * to buffer_offset, which is the offset within the task (SCSI 756 * command). 757 */ 758 off = 0; 759 len = icl_pdu_data_segment_length(request); 760 761 /* 762 * Iterate over the scatter/gather segments, filling them with data 763 * from the PDU data segment. Note that this can get called multiple 764 * times for one SCSI command; the cdw structure holds state for the 765 * scatter/gather list. 766 */ 767 for (;;) { 768 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 769 ("cdw->cdw_sg_index >= ctl_sg_count")); 770 if (cdw->cdw_sg_len == 0) { 771 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 772 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 773 } 774 KASSERT(off <= len, ("len > off")); 775 copy_len = len - off; 776 if (copy_len > cdw->cdw_sg_len) 777 copy_len = cdw->cdw_sg_len; 778 779 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 780 cdw->cdw_sg_addr += copy_len; 781 cdw->cdw_sg_len -= copy_len; 782 off += copy_len; 783 io->scsiio.ext_data_filled += copy_len; 784 785 if (cdw->cdw_sg_len == 0) { 786 /* 787 * End of current segment. 788 */ 789 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 790 /* 791 * Last segment in scatter/gather list. 792 */ 793 break; 794 } 795 cdw->cdw_sg_index++; 796 } 797 798 if (off == len) { 799 /* 800 * End of PDU payload. 801 */ 802 break; 803 } 804 } 805 806 if (len > off) { 807 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 808 "expected %zd", icl_pdu_data_segment_length(request), off); 809 cfiscsi_session_terminate(cs); 810 return (true); 811 } 812 813 if (bhsdo->bhsdo_flags & BHSDO_FLAGS_F || 814 io->scsiio.ext_data_filled == io->scsiio.kern_total_len) { 815 if ((bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 816 CFISCSI_SESSION_WARN(cs, "got the final packet without " 817 "the F flag; flags = 0x%x; dropping connection", 818 bhsdo->bhsdo_flags); 819 cfiscsi_session_terminate(cs); 820 return (true); 821 } 822 823 if (io->scsiio.ext_data_filled != io->scsiio.kern_total_len) { 824 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 825 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 826 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 827 "transmitted size was %zd bytes instead of %d; " 828 "dropping connection", 829 (size_t)io->scsiio.ext_data_filled, 830 io->scsiio.kern_total_len); 831 cfiscsi_session_terminate(cs); 832 return (true); 833 } else { 834 /* 835 * For SCSI Command PDU, this just means we need to 836 * solicit more data by sending R2T. 837 */ 838 return (false); 839 } 840 } 841#if 0 842 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 843 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 844#endif 845 846 return (true); 847 } 848 849 return (false); 850} 851 852static void 853cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 854{ 855 struct iscsi_bhs_data_out *bhsdo; 856 struct cfiscsi_session *cs; 857 struct cfiscsi_data_wait *cdw = NULL; 858 union ctl_io *io; 859 bool done; 860 861 cs = PDU_SESSION(request); 862 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 863 864 CFISCSI_SESSION_LOCK(cs); 865 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 866#if 0 867 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 868 "ttt 0x%x, itt 0x%x", 869 bhsdo->bhsdo_target_transfer_tag, 870 bhsdo->bhsdo_initiator_task_tag, 871 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 872#endif 873 if (bhsdo->bhsdo_target_transfer_tag == 874 cdw->cdw_target_transfer_tag) 875 break; 876 } 877 CFISCSI_SESSION_UNLOCK(cs); 878 if (cdw == NULL) { 879 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 880 "0x%x, not found; dropping connection", 881 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 882 icl_pdu_free(request); 883 cfiscsi_session_terminate(cs); 884 return; 885 } 886 887 io = cdw->cdw_ctl_io; 888 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 889 ("CTL_FLAG_DATA_IN")); 890 891 done = cfiscsi_handle_data_segment(request, cdw); 892 if (done) { 893 CFISCSI_SESSION_LOCK(cs); 894 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 895 CFISCSI_SESSION_UNLOCK(cs); 896 uma_zfree(cfiscsi_data_wait_zone, cdw); 897 io->scsiio.be_move_done(io); 898 } 899 900 icl_pdu_free(request); 901} 902 903static void 904cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 905{ 906 struct iscsi_bhs_logout_request *bhslr; 907 struct iscsi_bhs_logout_response *bhslr2; 908 struct icl_pdu *response; 909 struct cfiscsi_session *cs; 910 911 cs = PDU_SESSION(request); 912 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 913 switch (bhslr->bhslr_reason & 0x7f) { 914 case BHSLR_REASON_CLOSE_SESSION: 915 case BHSLR_REASON_CLOSE_CONNECTION: 916 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 917 if (response == NULL) { 918 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 919 icl_pdu_free(request); 920 cfiscsi_session_terminate(cs); 921 return; 922 } 923 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 924 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 925 bhslr2->bhslr_flags = 0x80; 926 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 927 bhslr2->bhslr_initiator_task_tag = 928 bhslr->bhslr_initiator_task_tag; 929 icl_pdu_free(request); 930 cfiscsi_pdu_queue(response); 931 cfiscsi_session_terminate(cs); 932 break; 933 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 934 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 935 if (response == NULL) { 936 CFISCSI_SESSION_WARN(cs, 937 "failed to allocate memory; dropping connection"); 938 icl_pdu_free(request); 939 cfiscsi_session_terminate(cs); 940 return; 941 } 942 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 943 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 944 bhslr2->bhslr_flags = 0x80; 945 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 946 bhslr2->bhslr_initiator_task_tag = 947 bhslr->bhslr_initiator_task_tag; 948 icl_pdu_free(request); 949 cfiscsi_pdu_queue(response); 950 break; 951 default: 952 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 953 bhslr->bhslr_reason); 954 icl_pdu_free(request); 955 cfiscsi_session_terminate(cs); 956 break; 957 } 958} 959 960static void 961cfiscsi_callout(void *context) 962{ 963 struct icl_pdu *cp; 964 struct iscsi_bhs_nop_in *bhsni; 965 struct cfiscsi_session *cs; 966 967 cs = context; 968 969 if (cs->cs_terminating) 970 return; 971 972 callout_schedule(&cs->cs_callout, 1 * hz); 973 974 atomic_add_int(&cs->cs_timeout, 1); 975 976#ifdef ICL_KERNEL_PROXY 977 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 978 if (cs->cs_timeout > login_timeout) { 979 CFISCSI_SESSION_WARN(cs, "login timed out after " 980 "%d seconds; dropping connection", cs->cs_timeout); 981 cfiscsi_session_terminate(cs); 982 } 983 return; 984 } 985#endif 986 987 if (cs->cs_timeout >= ping_timeout) { 988 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 989 "dropping connection", ping_timeout); 990 cfiscsi_session_terminate(cs); 991 return; 992 } 993 994 /* 995 * If the ping was reset less than one second ago - which means 996 * that we've received some PDU during the last second - assume 997 * the traffic flows correctly and don't bother sending a NOP-Out. 998 * 999 * (It's 2 - one for one second, and one for incrementing is_timeout 1000 * earlier in this routine.) 1001 */ 1002 if (cs->cs_timeout < 2) 1003 return; 1004 1005 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1006 if (cp == NULL) { 1007 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1008 return; 1009 } 1010 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1011 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1012 bhsni->bhsni_flags = 0x80; 1013 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1014 1015 cfiscsi_pdu_queue(cp); 1016} 1017 1018static void 1019cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1020{ 1021 struct cfiscsi_data_wait *cdw, *tmpcdw; 1022 union ctl_io *io; 1023 int error; 1024 1025#ifdef notyet 1026 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1027 if (io == NULL) { 1028 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1029 return; 1030 } 1031 ctl_zero_io(io); 1032 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1033 io->io_hdr.io_type = CTL_IO_TASK; 1034 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1035 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1036 io->io_hdr.nexus.targ_target.id = 0; 1037 io->io_hdr.nexus.targ_lun = lun; 1038 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1039 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1040 error = ctl_queue(io); 1041 if (error != CTL_RETVAL_COMPLETE) { 1042 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1043 ctl_free_io(io); 1044 } 1045#else 1046 /* 1047 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1048 * just iterate over tasks that are waiting for something - data - and 1049 * terminate those. 1050 */ 1051 CFISCSI_SESSION_LOCK(cs); 1052 TAILQ_FOREACH_SAFE(cdw, 1053 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1054 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1055 if (io == NULL) { 1056 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1057 return; 1058 } 1059 ctl_zero_io(io); 1060 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1061 io->io_hdr.io_type = CTL_IO_TASK; 1062 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1063 io->io_hdr.nexus.targ_port = 1064 cs->cs_target->ct_softc->fe.targ_port; 1065 io->io_hdr.nexus.targ_target.id = 0; 1066 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1067 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1068 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1069 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1070 error = ctl_queue(io); 1071 if (error != CTL_RETVAL_COMPLETE) { 1072 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1073 ctl_free_io(io); 1074 return; 1075 } 1076#if 0 1077 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1078 "0x%x", cdw->cdw_initiator_task_tag); 1079#endif 1080 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1081 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1082 uma_zfree(cfiscsi_data_wait_zone, cdw); 1083 } 1084 CFISCSI_SESSION_UNLOCK(cs); 1085#endif 1086} 1087 1088static void 1089cfiscsi_maintenance_thread(void *arg) 1090{ 1091 struct cfiscsi_session *cs; 1092 1093 cs = arg; 1094 1095 for (;;) { 1096 CFISCSI_SESSION_LOCK(cs); 1097 if (cs->cs_terminating == false) 1098 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1099 CFISCSI_SESSION_UNLOCK(cs); 1100 1101 if (cs->cs_terminating) { 1102 cfiscsi_session_terminate_tasks(cs); 1103 callout_drain(&cs->cs_callout); 1104 1105 icl_conn_shutdown(cs->cs_conn); 1106 icl_conn_close(cs->cs_conn); 1107 1108 cs->cs_terminating++; 1109 1110 /* 1111 * XXX: We used to wait up to 30 seconds to deliver queued PDUs 1112 * to the initiator. We also tried hard to deliver SCSI Responses 1113 * for the aborted PDUs. We don't do that anymore. We might need 1114 * to revisit that. 1115 */ 1116 1117 cfiscsi_session_delete(cs); 1118 kthread_exit(); 1119 return; 1120 } 1121 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1122 } 1123} 1124 1125static void 1126cfiscsi_session_terminate(struct cfiscsi_session *cs) 1127{ 1128 1129 if (cs->cs_terminating != 0) 1130 return; 1131 cs->cs_terminating = 1; 1132 cv_signal(&cs->cs_maintenance_cv); 1133} 1134 1135static int 1136cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1137{ 1138 int error, i; 1139 struct cfiscsi_softc *softc; 1140 1141 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1142 1143 softc = &cfiscsi_softc; 1144 1145 mtx_lock(&softc->lock); 1146 for (i = 0; i < softc->max_initiators; i++) { 1147 if (softc->ctl_initids[i] == 0) 1148 break; 1149 } 1150 if (i == softc->max_initiators) { 1151 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1152 softc->max_initiators); 1153 mtx_unlock(&softc->lock); 1154 return (1); 1155 } 1156 softc->ctl_initids[i] = 1; 1157 mtx_unlock(&softc->lock); 1158 1159#if 0 1160 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1161 i, softc->max_initiators); 1162#endif 1163 cs->cs_ctl_initid = i; 1164 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1165 if (error != 0) { 1166 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1167 mtx_lock(&softc->lock); 1168 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1169 mtx_unlock(&softc->lock); 1170 cs->cs_ctl_initid = -1; 1171 return (1); 1172 } 1173 1174 return (0); 1175} 1176 1177static void 1178cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1179{ 1180 int error; 1181 struct cfiscsi_softc *softc; 1182 1183 if (cs->cs_ctl_initid == -1) 1184 return; 1185 1186 softc = &cfiscsi_softc; 1187 1188 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1189 if (error != 0) { 1190 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1191 error); 1192 } 1193 mtx_lock(&softc->lock); 1194 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1195 mtx_unlock(&softc->lock); 1196 cs->cs_ctl_initid = -1; 1197} 1198 1199static struct cfiscsi_session * 1200cfiscsi_session_new(struct cfiscsi_softc *softc) 1201{ 1202 struct cfiscsi_session *cs; 1203 int error; 1204 1205 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1206 if (cs == NULL) { 1207 CFISCSI_WARN("malloc failed"); 1208 return (NULL); 1209 } 1210 cs->cs_ctl_initid = -1; 1211 1212 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1213 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1214 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1215 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1216#ifdef ICL_KERNEL_PROXY 1217 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1218#endif 1219 1220 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1221 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1222 cs->cs_conn->ic_error = cfiscsi_error_callback; 1223 cs->cs_conn->ic_prv0 = cs; 1224 1225 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1226 if (error != 0) { 1227 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1228 free(cs, M_CFISCSI); 1229 return (NULL); 1230 } 1231 1232 mtx_lock(&softc->lock); 1233 cs->cs_id = softc->last_session_id + 1; 1234 softc->last_session_id++; 1235 mtx_unlock(&softc->lock); 1236 1237 mtx_lock(&softc->lock); 1238 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1239 mtx_unlock(&softc->lock); 1240 1241 /* 1242 * Start pinging the initiator. 1243 */ 1244 callout_init(&cs->cs_callout, 1); 1245 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1246 1247 return (cs); 1248} 1249 1250static void 1251cfiscsi_session_delete(struct cfiscsi_session *cs) 1252{ 1253 struct cfiscsi_softc *softc; 1254 1255 softc = &cfiscsi_softc; 1256 1257 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1258 ("destroying session with outstanding CTL pdus")); 1259 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1260 ("destroying session with non-empty queue")); 1261 1262 cfiscsi_session_unregister_initiator(cs); 1263 if (cs->cs_target != NULL) 1264 cfiscsi_target_release(cs->cs_target); 1265 icl_conn_close(cs->cs_conn); 1266 icl_conn_free(cs->cs_conn); 1267 1268 mtx_lock(&softc->lock); 1269 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1270 mtx_unlock(&softc->lock); 1271 1272 free(cs, M_CFISCSI); 1273} 1274 1275int 1276cfiscsi_init(void) 1277{ 1278 struct cfiscsi_softc *softc; 1279 struct ctl_frontend *fe; 1280 int retval; 1281 1282 softc = &cfiscsi_softc; 1283 retval = 0; 1284 bzero(softc, sizeof(*softc)); 1285 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1286 1287#ifdef ICL_KERNEL_PROXY 1288 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1289#endif 1290 TAILQ_INIT(&softc->sessions); 1291 TAILQ_INIT(&softc->targets); 1292 1293 fe = &softc->fe; 1294 fe->port_type = CTL_PORT_ISCSI; 1295 /* XXX KDM what should the real number be here? */ 1296 fe->num_requested_ctl_io = 4096; 1297 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1298 fe->port_name = softc->port_name; 1299 fe->port_online = cfiscsi_online; 1300 fe->port_offline = cfiscsi_offline; 1301 fe->onoff_arg = softc; 1302 fe->targ_enable = cfiscsi_targ_enable; 1303 fe->targ_disable = cfiscsi_targ_disable; 1304 fe->lun_enable = cfiscsi_lun_enable; 1305 fe->lun_disable = cfiscsi_lun_disable; 1306 fe->targ_lun_arg = softc; 1307 fe->ioctl = cfiscsi_ioctl; 1308 fe->devid = cfiscsi_devid; 1309 fe->fe_datamove = cfiscsi_datamove; 1310 fe->fe_done = cfiscsi_done; 1311 1312 /* XXX KDM what should we report here? */ 1313 /* XXX These should probably be fetched from CTL. */ 1314 fe->max_targets = 1; 1315 fe->max_target_id = 15; 1316 1317 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1318 if (retval != 0) { 1319 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1320 retval); 1321 retval = 1; 1322 goto bailout; 1323 } 1324 1325 softc->max_initiators = fe->max_initiators; 1326 1327 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1328 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1329 UMA_ALIGN_PTR, 0); 1330 1331 return (0); 1332 1333bailout: 1334 return (retval); 1335} 1336 1337static int 1338cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1339{ 1340 1341 switch (what) { 1342 case MOD_LOAD: 1343 return (cfiscsi_init()); 1344 case MOD_UNLOAD: 1345 return (EBUSY); 1346 default: 1347 return (EOPNOTSUPP); 1348 } 1349} 1350 1351#ifdef ICL_KERNEL_PROXY 1352static void 1353cfiscsi_accept(struct socket *so) 1354{ 1355 struct cfiscsi_session *cs; 1356 1357 cs = cfiscsi_session_new(&cfiscsi_softc); 1358 if (cs == NULL) { 1359 CFISCSI_WARN("failed to create session"); 1360 return; 1361 } 1362 1363 icl_conn_handoff_sock(cs->cs_conn, so); 1364 cs->cs_waiting_for_ctld = true; 1365 cv_signal(&cfiscsi_softc.accept_cv); 1366} 1367#endif 1368 1369static void 1370cfiscsi_online(void *arg) 1371{ 1372 struct cfiscsi_softc *softc; 1373 1374 softc = (struct cfiscsi_softc *)arg; 1375 1376 softc->online = 1; 1377#ifdef ICL_KERNEL_PROXY 1378 if (softc->listener != NULL) 1379 icl_listen_free(softc->listener); 1380 softc->listener = icl_listen_new(cfiscsi_accept); 1381#endif 1382} 1383 1384static void 1385cfiscsi_offline(void *arg) 1386{ 1387 struct cfiscsi_softc *softc; 1388 struct cfiscsi_session *cs; 1389 1390 softc = (struct cfiscsi_softc *)arg; 1391 1392 softc->online = 0; 1393 1394 mtx_lock(&softc->lock); 1395 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1396 cfiscsi_session_terminate(cs); 1397 mtx_unlock(&softc->lock); 1398 1399#ifdef ICL_KERNEL_PROXY 1400 icl_listen_free(softc->listener); 1401 softc->listener = NULL; 1402#endif 1403} 1404 1405static int 1406cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1407{ 1408 1409 return (0); 1410} 1411 1412static int 1413cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1414{ 1415 1416 return (0); 1417} 1418 1419static void 1420cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1421{ 1422 struct cfiscsi_softc *softc; 1423 struct cfiscsi_session *cs; 1424 struct cfiscsi_target *ct; 1425 struct ctl_iscsi_handoff_params *cihp; 1426 int error; 1427 1428 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1429 softc = &cfiscsi_softc; 1430 1431 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1432 cihp->initiator_name, cihp->initiator_addr, 1433 cihp->target_name); 1434 1435 if (softc->online == 0) { 1436 ci->status = CTL_ISCSI_ERROR; 1437 snprintf(ci->error_str, sizeof(ci->error_str), 1438 "%s: port offline", __func__); 1439 return; 1440 } 1441 1442 ct = cfiscsi_target_find(softc, cihp->target_name); 1443 if (ct == NULL) { 1444 ci->status = CTL_ISCSI_ERROR; 1445 snprintf(ci->error_str, sizeof(ci->error_str), 1446 "%s: target not found", __func__); 1447 return; 1448 } 1449 1450#ifdef ICL_KERNEL_PROXY 1451 if (cihp->socket > 0 && cihp->connection_id > 0) { 1452 snprintf(ci->error_str, sizeof(ci->error_str), 1453 "both socket and connection_id set"); 1454 ci->status = CTL_ISCSI_ERROR; 1455 cfiscsi_target_release(ct); 1456 return; 1457 } 1458 if (cihp->socket == 0) { 1459 mtx_lock(&cfiscsi_softc.lock); 1460 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1461 if (cs->cs_id == cihp->socket) 1462 break; 1463 } 1464 if (cs == NULL) { 1465 mtx_unlock(&cfiscsi_softc.lock); 1466 snprintf(ci->error_str, sizeof(ci->error_str), 1467 "connection not found"); 1468 ci->status = CTL_ISCSI_ERROR; 1469 cfiscsi_target_release(ct); 1470 return; 1471 } 1472 mtx_unlock(&cfiscsi_softc.lock); 1473 } else { 1474#endif 1475 cs = cfiscsi_session_new(softc); 1476 if (cs == NULL) { 1477 ci->status = CTL_ISCSI_ERROR; 1478 snprintf(ci->error_str, sizeof(ci->error_str), 1479 "%s: cfiscsi_session_new failed", __func__); 1480 cfiscsi_target_release(ct); 1481 return; 1482 } 1483#ifdef ICL_KERNEL_PROXY 1484 } 1485#endif 1486 cs->cs_target = ct; 1487 1488 /* 1489 * First PDU of Full Feature phase has the same CmdSN as the last 1490 * PDU from the Login Phase received from the initiator. Thus, 1491 * the -1 below. 1492 */ 1493 cs->cs_portal_group_tag = cihp->portal_group_tag; 1494 cs->cs_cmdsn = cihp->cmdsn; 1495 cs->cs_statsn = cihp->statsn; 1496 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1497 cs->cs_max_burst_length = cihp->max_burst_length; 1498 cs->cs_immediate_data = !!cihp->immediate_data; 1499 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1500 cs->cs_conn->ic_header_crc32c = true; 1501 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1502 cs->cs_conn->ic_data_crc32c = true; 1503 1504 strlcpy(cs->cs_initiator_name, 1505 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1506 strlcpy(cs->cs_initiator_addr, 1507 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1508 strlcpy(cs->cs_initiator_alias, 1509 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1510 1511#ifdef ICL_KERNEL_PROXY 1512 if (cihp->socket > 0) { 1513#endif 1514 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1515 if (error != 0) { 1516 cfiscsi_session_delete(cs); 1517 ci->status = CTL_ISCSI_ERROR; 1518 snprintf(ci->error_str, sizeof(ci->error_str), 1519 "%s: icl_conn_handoff failed with error %d", 1520 __func__, error); 1521 return; 1522 } 1523#ifdef ICL_KERNEL_PROXY 1524 } 1525#endif 1526 1527 /* 1528 * Register initiator with CTL. 1529 */ 1530 cfiscsi_session_register_initiator(cs); 1531 1532#ifdef ICL_KERNEL_PROXY 1533 cs->cs_login_phase = false; 1534 1535 /* 1536 * First PDU of the Full Feature phase has likely already arrived. 1537 * We have to pick it up and execute properly. 1538 */ 1539 if (cs->cs_login_pdu != NULL) { 1540 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1541 cfiscsi_pdu_handle(cs->cs_login_pdu); 1542 cs->cs_login_pdu = NULL; 1543 } 1544#endif 1545 1546 ci->status = CTL_ISCSI_OK; 1547} 1548 1549static void 1550cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1551{ 1552 struct ctl_iscsi_list_params *cilp; 1553 struct cfiscsi_session *cs; 1554 struct cfiscsi_softc *softc; 1555 struct sbuf *sb; 1556 int error; 1557 1558 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1559 softc = &cfiscsi_softc; 1560 1561 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1562 if (sb == NULL) { 1563 ci->status = CTL_ISCSI_ERROR; 1564 snprintf(ci->error_str, sizeof(ci->error_str), 1565 "Unable to allocate %d bytes for iSCSI session list", 1566 cilp->alloc_len); 1567 return; 1568 } 1569 1570 sbuf_printf(sb, "<ctlislist>\n"); 1571 mtx_lock(&softc->lock); 1572 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1573#ifdef ICL_KERNEL_PROXY 1574 if (cs->cs_target == NULL) 1575 continue; 1576#endif 1577 error = sbuf_printf(sb, "<connection id=\"%d\">" 1578 "<initiator>%s</initiator>" 1579 "<initiator_addr>%s</initiator_addr>" 1580 "<initiator_alias>%s</initiator_alias>" 1581 "<target>%s</target>" 1582 "<target_alias>%s</target_alias>" 1583 "<header_digest>%s</header_digest>" 1584 "<data_digest>%s</data_digest>" 1585 "<max_data_segment_length>%zd</max_data_segment_length>" 1586 "<immediate_data>%d</immediate_data>" 1587 "<iser>%d</iser>" 1588 "</connection>\n", 1589 cs->cs_id, 1590 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1591 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1592 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1593 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1594 cs->cs_max_data_segment_length, 1595 cs->cs_immediate_data, 1596 cs->cs_conn->ic_iser); 1597 if (error != 0) 1598 break; 1599 } 1600 mtx_unlock(&softc->lock); 1601 error = sbuf_printf(sb, "</ctlislist>\n"); 1602 if (error != 0) { 1603 sbuf_delete(sb); 1604 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1605 snprintf(ci->error_str, sizeof(ci->error_str), 1606 "Out of space, %d bytes is too small", cilp->alloc_len); 1607 return; 1608 } 1609 sbuf_finish(sb); 1610 1611 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1612 cilp->fill_len = sbuf_len(sb) + 1; 1613 ci->status = CTL_ISCSI_OK; 1614 sbuf_delete(sb); 1615} 1616 1617static void 1618cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1619{ 1620 struct icl_pdu *response; 1621 struct iscsi_bhs_asynchronous_message *bhsam; 1622 struct ctl_iscsi_terminate_params *citp; 1623 struct cfiscsi_session *cs; 1624 struct cfiscsi_softc *softc; 1625 int found = 0; 1626 1627 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1628 softc = &cfiscsi_softc; 1629 1630 mtx_lock(&softc->lock); 1631 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1632 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1633 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1634 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1635 continue; 1636 1637 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1638 if (response == NULL) { 1639 /* 1640 * Oh well. Just terminate the connection. 1641 */ 1642 } else { 1643 bhsam = (struct iscsi_bhs_asynchronous_message *) 1644 response->ip_bhs; 1645 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1646 bhsam->bhsam_flags = 0x80; 1647 bhsam->bhsam_0xffffffff = 0xffffffff; 1648 bhsam->bhsam_async_event = 1649 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1650 cfiscsi_pdu_queue(response); 1651 } 1652 cfiscsi_session_terminate(cs); 1653 found++; 1654 } 1655 mtx_unlock(&softc->lock); 1656 1657 if (found == 0) { 1658 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1659 snprintf(ci->error_str, sizeof(ci->error_str), 1660 "No matching connections found"); 1661 return; 1662 } 1663 1664 ci->status = CTL_ISCSI_OK; 1665} 1666 1667static void 1668cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1669{ 1670 struct icl_pdu *response; 1671 struct iscsi_bhs_asynchronous_message *bhsam; 1672 struct ctl_iscsi_logout_params *cilp; 1673 struct cfiscsi_session *cs; 1674 struct cfiscsi_softc *softc; 1675 int found = 0; 1676 1677 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1678 softc = &cfiscsi_softc; 1679 1680 mtx_lock(&softc->lock); 1681 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1682 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1683 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1684 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1685 continue; 1686 1687 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1688 if (response == NULL) { 1689 ci->status = CTL_ISCSI_ERROR; 1690 snprintf(ci->error_str, sizeof(ci->error_str), 1691 "Unable to allocate memory"); 1692 mtx_unlock(&softc->lock); 1693 return; 1694 } 1695 bhsam = 1696 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1697 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1698 bhsam->bhsam_flags = 0x80; 1699 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1700 bhsam->bhsam_parameter3 = htons(10); 1701 cfiscsi_pdu_queue(response); 1702 found++; 1703 } 1704 mtx_unlock(&softc->lock); 1705 1706 if (found == 0) { 1707 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1708 snprintf(ci->error_str, sizeof(ci->error_str), 1709 "No matching connections found"); 1710 return; 1711 } 1712 1713 ci->status = CTL_ISCSI_OK; 1714} 1715 1716#ifdef ICL_KERNEL_PROXY 1717static void 1718cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1719{ 1720 struct ctl_iscsi_listen_params *cilp; 1721 struct sockaddr *sa; 1722 int error; 1723 1724 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1725 1726 if (cfiscsi_softc.listener == NULL) { 1727 CFISCSI_DEBUG("no listener"); 1728 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1729 ci->status = CTL_ISCSI_ERROR; 1730 return; 1731 } 1732 1733 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1734 if (error != 0) { 1735 CFISCSI_DEBUG("getsockaddr, error %d", error); 1736 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1737 ci->status = CTL_ISCSI_ERROR; 1738 return; 1739 } 1740 1741 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1742 cilp->socktype, cilp->protocol, sa); 1743 if (error != 0) { 1744 free(sa, M_SONAME); 1745 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1746 snprintf(ci->error_str, sizeof(ci->error_str), 1747 "icl_listen_add failed, error %d", error); 1748 ci->status = CTL_ISCSI_ERROR; 1749 return; 1750 } 1751 1752 ci->status = CTL_ISCSI_OK; 1753} 1754 1755static void 1756cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1757{ 1758 struct ctl_iscsi_accept_params *ciap; 1759 struct cfiscsi_session *cs; 1760 int error; 1761 1762 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1763 1764 mtx_lock(&cfiscsi_softc.lock); 1765 for (;;) { 1766 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1767 if (cs->cs_waiting_for_ctld) 1768 break; 1769 } 1770 if (cs != NULL) 1771 break; 1772 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1773 if (error != 0) { 1774 mtx_unlock(&cfiscsi_softc.lock); 1775 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1776 ci->status = CTL_ISCSI_ERROR; 1777 return; 1778 } 1779 } 1780 mtx_unlock(&cfiscsi_softc.lock); 1781 1782 cs->cs_waiting_for_ctld = false; 1783 cs->cs_login_phase = true; 1784 1785 ciap->connection_id = cs->cs_id; 1786 ci->status = CTL_ISCSI_OK; 1787} 1788 1789static void 1790cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1791{ 1792 struct ctl_iscsi_send_params *cisp; 1793 struct cfiscsi_session *cs; 1794 struct icl_pdu *ip; 1795 size_t datalen; 1796 void *data; 1797 int error; 1798 1799 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1800 1801 mtx_lock(&cfiscsi_softc.lock); 1802 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1803 if (cs->cs_id == cisp->connection_id) 1804 break; 1805 } 1806 if (cs == NULL) { 1807 mtx_unlock(&cfiscsi_softc.lock); 1808 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1809 ci->status = CTL_ISCSI_ERROR; 1810 return; 1811 } 1812 mtx_unlock(&cfiscsi_softc.lock); 1813 1814#if 0 1815 if (cs->cs_login_phase == false) 1816 return (EBUSY); 1817#endif 1818 1819 if (cs->cs_terminating) { 1820 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1821 ci->status = CTL_ISCSI_ERROR; 1822 return; 1823 } 1824 1825 datalen = cisp->data_segment_len; 1826 /* 1827 * XXX 1828 */ 1829 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1830 if (datalen > 65535) { 1831 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1832 ci->status = CTL_ISCSI_ERROR; 1833 return; 1834 } 1835 if (datalen > 0) { 1836 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1837 error = copyin(cisp->data_segment, data, datalen); 1838 if (error != 0) { 1839 free(data, M_CFISCSI); 1840 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1841 ci->status = CTL_ISCSI_ERROR; 1842 return; 1843 } 1844 } 1845 1846 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1847 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1848 if (datalen > 0) { 1849 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1850 free(data, M_CFISCSI); 1851 } 1852 CFISCSI_SESSION_LOCK(cs); 1853 icl_pdu_queue(ip); 1854 CFISCSI_SESSION_UNLOCK(cs); 1855 ci->status = CTL_ISCSI_OK; 1856} 1857 1858static void 1859cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1860{ 1861 struct ctl_iscsi_receive_params *cirp; 1862 struct cfiscsi_session *cs; 1863 struct icl_pdu *ip; 1864 void *data; 1865 1866 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1867 1868 mtx_lock(&cfiscsi_softc.lock); 1869 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1870 if (cs->cs_id == cirp->connection_id) 1871 break; 1872 } 1873 if (cs == NULL) { 1874 mtx_unlock(&cfiscsi_softc.lock); 1875 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1876 ci->status = CTL_ISCSI_ERROR; 1877 return; 1878 } 1879 mtx_unlock(&cfiscsi_softc.lock); 1880 1881#if 0 1882 if (is->is_login_phase == false) 1883 return (EBUSY); 1884#endif 1885 1886 CFISCSI_SESSION_LOCK(cs); 1887 while (cs->cs_login_pdu == NULL && 1888 cs->cs_terminating == false) 1889 cv_wait(&cs->cs_login_cv, &cs->cs_lock); 1890 if (cs->cs_terminating) { 1891 CFISCSI_SESSION_UNLOCK(cs); 1892 snprintf(ci->error_str, sizeof(ci->error_str), "connection terminating"); 1893 ci->status = CTL_ISCSI_ERROR; 1894 return; 1895 } 1896 ip = cs->cs_login_pdu; 1897 cs->cs_login_pdu = NULL; 1898 CFISCSI_SESSION_UNLOCK(cs); 1899 1900 if (ip->ip_data_len > cirp->data_segment_len) { 1901 icl_pdu_free(ip); 1902 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1903 ci->status = CTL_ISCSI_ERROR; 1904 return; 1905 } 1906 1907 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1908 if (ip->ip_data_len > 0) { 1909 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1910 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1911 copyout(data, cirp->data_segment, ip->ip_data_len); 1912 free(data, M_CFISCSI); 1913 } 1914 1915 icl_pdu_free(ip); 1916 ci->status = CTL_ISCSI_OK; 1917} 1918 1919static void 1920cfiscsi_ioctl_close(struct ctl_iscsi *ci) 1921{ 1922 /* 1923 * XXX 1924 */ 1925} 1926#endif /* !ICL_KERNEL_PROXY */ 1927 1928static int 1929cfiscsi_ioctl(struct cdev *dev, 1930 u_long cmd, caddr_t addr, int flag, struct thread *td) 1931{ 1932 struct ctl_iscsi *ci; 1933 1934 if (cmd != CTL_ISCSI) 1935 return (ENOTTY); 1936 1937 ci = (struct ctl_iscsi *)addr; 1938 switch (ci->type) { 1939 case CTL_ISCSI_HANDOFF: 1940 cfiscsi_ioctl_handoff(ci); 1941 break; 1942 case CTL_ISCSI_LIST: 1943 cfiscsi_ioctl_list(ci); 1944 break; 1945 case CTL_ISCSI_TERMINATE: 1946 cfiscsi_ioctl_terminate(ci); 1947 break; 1948 case CTL_ISCSI_LOGOUT: 1949 cfiscsi_ioctl_logout(ci); 1950 break; 1951#ifdef ICL_KERNEL_PROXY 1952 case CTL_ISCSI_LISTEN: 1953 cfiscsi_ioctl_listen(ci); 1954 break; 1955 case CTL_ISCSI_ACCEPT: 1956 cfiscsi_ioctl_accept(ci); 1957 break; 1958 case CTL_ISCSI_SEND: 1959 cfiscsi_ioctl_send(ci); 1960 break; 1961 case CTL_ISCSI_RECEIVE: 1962 cfiscsi_ioctl_receive(ci); 1963 break; 1964 case CTL_ISCSI_CLOSE: 1965 cfiscsi_ioctl_close(ci); 1966 break; 1967#else 1968 case CTL_ISCSI_LISTEN: 1969 case CTL_ISCSI_ACCEPT: 1970 case CTL_ISCSI_SEND: 1971 case CTL_ISCSI_RECEIVE: 1972 case CTL_ISCSI_CLOSE: 1973 ci->status = CTL_ISCSI_ERROR; 1974 snprintf(ci->error_str, sizeof(ci->error_str), 1975 "%s: CTL compiled without ICL_KERNEL_PROXY", 1976 __func__); 1977 break; 1978#endif /* !ICL_KERNEL_PROXY */ 1979 default: 1980 ci->status = CTL_ISCSI_ERROR; 1981 snprintf(ci->error_str, sizeof(ci->error_str), 1982 "%s: invalid iSCSI request type %d", __func__, ci->type); 1983 break; 1984 } 1985 1986 return (0); 1987} 1988 1989static int 1990cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 1991{ 1992 struct cfiscsi_session *cs; 1993 struct scsi_vpd_device_id *devid_ptr; 1994 struct scsi_vpd_id_descriptor *desc, *desc1; 1995 struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */ 1996 struct scsi_vpd_id_t10 *t10id; 1997 struct ctl_lun *lun; 1998 const struct icl_pdu *request; 1999 size_t devid_len, wwpn_len; 2000 2001 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 2002 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2003 cs = PDU_SESSION(request); 2004 2005 wwpn_len = strlen(cs->cs_target->ct_name); 2006 wwpn_len += strlen(",t,0x01"); 2007 wwpn_len += 1; /* '\0' */ 2008 if ((wwpn_len % 4) != 0) 2009 wwpn_len += (4 - (wwpn_len % 4)); 2010 2011 devid_len = sizeof(struct scsi_vpd_device_id) + 2012 sizeof(struct scsi_vpd_id_descriptor) + 2013 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 2014 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 2015 sizeof(struct scsi_vpd_id_descriptor) + 2016 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 2017 sizeof(struct scsi_vpd_id_descriptor) + 2018 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 2019 2020 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 2021 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 2022 ctsio->kern_sg_entries = 0; 2023 2024 if (devid_len < alloc_len) { 2025 ctsio->residual = alloc_len - devid_len; 2026 ctsio->kern_data_len = devid_len; 2027 ctsio->kern_total_len = devid_len; 2028 } else { 2029 ctsio->residual = 0; 2030 ctsio->kern_data_len = alloc_len; 2031 ctsio->kern_total_len = alloc_len; 2032 } 2033 ctsio->kern_data_resid = 0; 2034 ctsio->kern_rel_offset = 0; 2035 ctsio->kern_sg_entries = 0; 2036 2037 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2038 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2039 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2040 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 2041 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2042 wwpn_len); 2043 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2044 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2045 2046 if (lun != NULL) 2047 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2048 lun->be_lun->lun_type; 2049 else 2050 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2051 2052 devid_ptr->page_code = SVPD_DEVICE_ID; 2053 2054 scsi_ulto2b(devid_len - 4, devid_ptr->length); 2055 2056 /* 2057 * We're using a LUN association here. i.e., this device ID is a 2058 * per-LUN identifier. 2059 */ 2060 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2061 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2062 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 2063 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2064 2065 /* 2066 * If we've actually got a backend, copy the device id from the 2067 * per-LUN data. Otherwise, set it to all spaces. 2068 */ 2069 if (lun != NULL) { 2070 /* 2071 * Copy the backend's LUN ID. 2072 */ 2073 strncpy((char *)t10id->vendor_spec_id, 2074 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2075 } else { 2076 /* 2077 * No backend, set this to spaces. 2078 */ 2079 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2080 } 2081 2082 /* 2083 * desc1 is for the WWPN which is a port asscociation. 2084 */ 2085 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2086 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2087 SVPD_ID_TYPE_SCSI_NAME; 2088 desc1->length = wwpn_len; 2089 snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x", 2090 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2091 2092 /* 2093 * desc2 is for the Relative Target Port(type 4h) identifier 2094 */ 2095 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2096 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2097 SVPD_ID_TYPE_RELTARG; 2098 desc2->length = 4; 2099 desc2->identifier[3] = 1; 2100 2101 /* 2102 * desc3 is for the Target Port Group(type 5h) identifier 2103 */ 2104 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2105 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2106 SVPD_ID_TYPE_TPORTGRP; 2107 desc3->length = 4; 2108 desc3->identifier[3] = 1; 2109 2110 ctsio->scsi_status = SCSI_STATUS_OK; 2111 2112 ctsio->be_move_done = ctl_config_move_done; 2113 ctl_datamove((union ctl_io *)ctsio); 2114 2115 return (CTL_RETVAL_COMPLETE); 2116} 2117 2118static void 2119cfiscsi_target_hold(struct cfiscsi_target *ct) 2120{ 2121 2122 refcount_acquire(&ct->ct_refcount); 2123} 2124 2125static void 2126cfiscsi_target_release(struct cfiscsi_target *ct) 2127{ 2128 struct cfiscsi_softc *softc; 2129 2130 softc = ct->ct_softc; 2131 mtx_lock(&softc->lock); 2132 if (refcount_release(&ct->ct_refcount)) { 2133 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2134 mtx_unlock(&softc->lock); 2135 free(ct, M_CFISCSI); 2136 2137 return; 2138 } 2139 mtx_unlock(&softc->lock); 2140} 2141 2142static struct cfiscsi_target * 2143cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2144{ 2145 struct cfiscsi_target *ct; 2146 2147 mtx_lock(&softc->lock); 2148 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2149 if (strcmp(name, ct->ct_name) != 0) 2150 continue; 2151 cfiscsi_target_hold(ct); 2152 mtx_unlock(&softc->lock); 2153 return (ct); 2154 } 2155 mtx_unlock(&softc->lock); 2156 2157 return (NULL); 2158} 2159 2160static struct cfiscsi_target * 2161cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2162 const char *alias) 2163{ 2164 struct cfiscsi_target *ct, *newct; 2165 int i; 2166 2167 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2168 return (NULL); 2169 2170 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2171 2172 mtx_lock(&softc->lock); 2173 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2174 if (strcmp(name, ct->ct_name) != 0) 2175 continue; 2176 cfiscsi_target_hold(ct); 2177 mtx_unlock(&softc->lock); 2178 free(newct, M_CFISCSI); 2179 return (ct); 2180 } 2181 2182 for (i = 0; i < CTL_MAX_LUNS; i++) 2183 newct->ct_luns[i] = -1; 2184 2185 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2186 if (alias != NULL) 2187 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2188 refcount_init(&newct->ct_refcount, 1); 2189 newct->ct_softc = softc; 2190 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2191 mtx_unlock(&softc->lock); 2192 2193 return (newct); 2194} 2195 2196/* 2197 * Takes LUN from the target space and returns LUN from the CTL space. 2198 */ 2199static uint32_t 2200cfiscsi_map_lun(void *arg, uint32_t lun) 2201{ 2202 struct cfiscsi_session *cs; 2203 2204 cs = arg; 2205 2206 if (lun >= CTL_MAX_LUNS) { 2207 CFISCSI_DEBUG("requested lun number %d is higher " 2208 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2209 return (0xffffffff); 2210 } 2211 2212 if (cs->cs_target->ct_luns[lun] < 0) 2213 return (0xffffffff); 2214 2215 return (cs->cs_target->ct_luns[lun]); 2216} 2217 2218static int 2219cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2220 unsigned long lun_id, unsigned long ctl_lun_id) 2221{ 2222 2223 if (lun_id >= CTL_MAX_LUNS) { 2224 CFISCSI_WARN("requested lun number %ld is higher " 2225 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2226 return (-1); 2227 } 2228 2229 if (ct->ct_luns[lun_id] >= 0) { 2230 /* 2231 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2232 * when the LUN is created, and a second time just before 2233 * the port is brought online; don't emit warnings 2234 * for that case. 2235 */ 2236 if (ct->ct_luns[lun_id] == ctl_lun_id) 2237 return (0); 2238 CFISCSI_WARN("lun %ld already allocated", lun_id); 2239 return (-1); 2240 } 2241 2242#if 0 2243 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2244 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2245#endif 2246 2247 ct->ct_luns[lun_id] = ctl_lun_id; 2248 cfiscsi_target_hold(ct); 2249 2250 return (0); 2251} 2252 2253static int 2254cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2255{ 2256 2257 if (ct->ct_luns[lun_id] < 0) { 2258 CFISCSI_WARN("lun %ld not allocated", lun_id); 2259 return (-1); 2260 } 2261 2262 ct->ct_luns[lun_id] = -1; 2263 cfiscsi_target_release(ct); 2264 2265 return (0); 2266} 2267 2268static int 2269cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2270{ 2271 struct cfiscsi_softc *softc; 2272 struct cfiscsi_target *ct; 2273 struct ctl_be_lun_option *opt; 2274 const char *target = NULL, *target_alias = NULL; 2275 const char *lun = NULL; 2276 unsigned long tmp; 2277 2278 softc = (struct cfiscsi_softc *)arg; 2279 2280 STAILQ_FOREACH(opt, 2281 &control_softc->ctl_luns[lun_id]->be_lun->options, links) { 2282 if (strcmp(opt->name, "cfiscsi_target") == 0) 2283 target = opt->value; 2284 else if (strcmp(opt->name, "cfiscsi_target_alias") == 0) 2285 target_alias = opt->value; 2286 else if (strcmp(opt->name, "cfiscsi_lun") == 0) 2287 lun = opt->value; 2288 } 2289 2290 if (target == NULL && lun == NULL) 2291 return (0); 2292 2293 if (target == NULL || lun == NULL) { 2294 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2295 "cfiscsi_lun, or the other way around; ignoring"); 2296 return (0); 2297 } 2298 2299 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2300 if (ct == NULL) { 2301 CFISCSI_WARN("failed to create target \"%s\"", target); 2302 return (0); 2303 } 2304 2305 tmp = strtoul(lun, NULL, 10); 2306 cfiscsi_target_set_lun(ct, tmp, lun_id); 2307 cfiscsi_target_release(ct); 2308 return (0); 2309} 2310 2311static int 2312cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2313{ 2314 struct cfiscsi_softc *softc; 2315 struct cfiscsi_target *ct; 2316 int i; 2317 2318 softc = (struct cfiscsi_softc *)arg; 2319 2320 mtx_lock(&softc->lock); 2321 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2322 for (i = 0; i < CTL_MAX_LUNS; i++) { 2323 if (ct->ct_luns[i] < 0) 2324 continue; 2325 if (ct->ct_luns[i] != lun_id) 2326 continue; 2327 mtx_unlock(&softc->lock); 2328 cfiscsi_target_unset_lun(ct, i); 2329 return (0); 2330 } 2331 } 2332 mtx_unlock(&softc->lock); 2333 return (0); 2334} 2335 2336static void 2337cfiscsi_datamove_in(union ctl_io *io) 2338{ 2339 struct cfiscsi_session *cs; 2340 struct icl_pdu *request, *response; 2341 const struct iscsi_bhs_scsi_command *bhssc; 2342 struct iscsi_bhs_data_in *bhsdi; 2343 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2344 size_t len, expected_len, sg_len, buffer_offset; 2345 const char *sg_addr; 2346 int ctl_sg_count, error, i; 2347 2348 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2349 cs = PDU_SESSION(request); 2350 2351 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2352 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2353 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2354 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2355 2356 if (io->scsiio.kern_sg_entries > 0) { 2357 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2358 ctl_sg_count = io->scsiio.kern_sg_entries; 2359 } else { 2360 ctl_sglist = &ctl_sg_entry; 2361 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2362 ctl_sglist->len = io->scsiio.kern_data_len; 2363 ctl_sg_count = 1; 2364 } 2365 2366 /* 2367 * This is the total amount of data to be transferred within the current 2368 * SCSI command. We need to record it so that we can properly report 2369 * underflow/underflow. 2370 */ 2371 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2372 2373 /* 2374 * This is the offset within the current SCSI command; for the first 2375 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2376 * it will be the sum of lengths of previous ones. It's being 2377 * incremented as we append data to the data segment. 2378 */ 2379 buffer_offset = io->scsiio.kern_rel_offset; 2380 2381 /* 2382 * This is the transfer length expected by the initiator. In theory, 2383 * it could be different from the correct amount of data from the SCSI 2384 * point of view, even if that doesn't make any sense. 2385 */ 2386 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2387#if 0 2388 if (expected_len != io->scsiio.kern_total_len) 2389 CFISCSI_SESSION_DEBUG(cs, "expected transfer length = %zd, " 2390 "actual length = %zd", expected_len, 2391 io->scsiio.kern_total_len); 2392#endif 2393 2394 if (buffer_offset >= expected_len) { 2395#if 0 2396 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2397 "already sent the expected len", buffer_offset); 2398#endif 2399 io->scsiio.ext_data_filled = io->scsiio.kern_total_len; 2400 io->scsiio.be_move_done(io); 2401 return; 2402 } 2403 2404 i = 0; 2405 sg_addr = NULL; 2406 sg_len = 0; 2407 response = NULL; 2408 bhsdi = NULL; 2409 for (;;) { 2410 if (response == NULL) { 2411 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2412 if (response == NULL) { 2413 CFISCSI_SESSION_WARN(cs, "failed to " 2414 "allocate memory; dropping connection"); 2415 ctl_set_busy(&io->scsiio); 2416 io->scsiio.be_move_done(io); 2417 cfiscsi_session_terminate(cs); 2418 return; 2419 } 2420 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2421 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2422 bhsdi->bhsdi_initiator_task_tag = 2423 bhssc->bhssc_initiator_task_tag; 2424 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2425 PDU_EXPDATASN(request)++; 2426 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2427 } 2428 2429 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2430 if (sg_len == 0) { 2431 sg_addr = ctl_sglist[i].addr; 2432 sg_len = ctl_sglist[i].len; 2433 KASSERT(sg_len > 0, ("sg_len <= 0")); 2434 } 2435 2436 len = sg_len; 2437 2438 /* 2439 * Truncate to maximum data segment length. 2440 */ 2441 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2442 ("max_data_segment_length %zd >= ip_data_len %zd", 2443 response->ip_data_len, cs->cs_max_data_segment_length)); 2444 if (response->ip_data_len + len > 2445 cs->cs_max_data_segment_length) 2446 len = cs->cs_max_data_segment_length - 2447 response->ip_data_len; 2448 2449 /* 2450 * Truncate to expected data transfer length. 2451 */ 2452 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2453 ("%zd >= %zd", buffer_offset + response->ip_data_len, expected_len)); 2454 if (buffer_offset + response->ip_data_len + len > expected_len) { 2455 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2456 "to expected data transfer length %zd", 2457 buffer_offset + response->ip_data_len + len, expected_len); 2458 len = expected_len - (buffer_offset + response->ip_data_len); 2459 } 2460 2461 KASSERT(len <= sg_len, ("len > sg_len")); 2462 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2463 if (error != 0) { 2464 CFISCSI_SESSION_WARN(cs, "failed to " 2465 "allocate memory; dropping connection"); 2466 icl_pdu_free(response); 2467 ctl_set_busy(&io->scsiio); 2468 io->scsiio.be_move_done(io); 2469 cfiscsi_session_terminate(cs); 2470 return; 2471 } 2472 sg_addr += len; 2473 sg_len -= len; 2474 buffer_offset += len; 2475 io->scsiio.ext_data_filled += len; 2476 2477 if (buffer_offset == expected_len) { 2478 /* 2479 * Already have the amount of data the initiator wanted. 2480 */ 2481 break; 2482 } 2483 2484 if (sg_len == 0) { 2485 /* 2486 * End of scatter-gather segment; 2487 * proceed to the next one... 2488 */ 2489 if (i == ctl_sg_count - 1) { 2490 /* 2491 * ... unless this was the last one. 2492 */ 2493 break; 2494 } 2495 i++; 2496 } 2497 2498 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2499 /* 2500 * Can't stuff more data into the current PDU; 2501 * queue it. Note that's not enough to check 2502 * for kern_data_resid == 0 instead; there 2503 * may be several Data-In PDUs for the final 2504 * call to cfiscsi_datamove(), and we want 2505 * to set the F flag only on the last of them. 2506 */ 2507 if (buffer_offset == io->scsiio.kern_total_len || 2508 buffer_offset == expected_len) 2509 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2510 cfiscsi_pdu_queue(response); 2511 response = NULL; 2512 bhsdi = NULL; 2513 } 2514 } 2515 if (response != NULL) { 2516 if (buffer_offset == io->scsiio.kern_total_len || 2517 buffer_offset == expected_len) 2518 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2519 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2520 cfiscsi_pdu_queue(response); 2521 } 2522 2523 io->scsiio.be_move_done(io); 2524} 2525 2526static void 2527cfiscsi_datamove_out(union ctl_io *io) 2528{ 2529 struct cfiscsi_session *cs; 2530 struct icl_pdu *request, *response; 2531 const struct iscsi_bhs_scsi_command *bhssc; 2532 struct iscsi_bhs_r2t *bhsr2t; 2533 struct cfiscsi_data_wait *cdw; 2534 uint32_t target_transfer_tag; 2535 bool done; 2536 2537 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2538 cs = PDU_SESSION(request); 2539 2540 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2541 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2542 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2543 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2544 2545 /* 2546 * We need to record it so that we can properly report 2547 * underflow/underflow. 2548 */ 2549 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2550 2551 target_transfer_tag = 2552 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2553 2554#if 0 2555 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2556 "task tag 0x%x, target transfer tag 0x%x", 2557 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2558#endif 2559 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2560 if (cdw == NULL) { 2561 CFISCSI_SESSION_WARN(cs, "failed to " 2562 "allocate memory; dropping connection"); 2563 ctl_set_busy(&io->scsiio); 2564 io->scsiio.be_move_done(io); 2565 cfiscsi_session_terminate(cs); 2566 return; 2567 } 2568 cdw->cdw_ctl_io = io; 2569 cdw->cdw_target_transfer_tag = target_transfer_tag; 2570 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2571 2572 if (cs->cs_immediate_data && icl_pdu_data_segment_length(request) > 0) { 2573 done = cfiscsi_handle_data_segment(request, cdw); 2574 if (done) { 2575 uma_zfree(cfiscsi_data_wait_zone, cdw); 2576 io->scsiio.be_move_done(io); 2577 return; 2578 } 2579 2580#if 0 2581 if (io->scsiio.ext_data_filled != 0) 2582 CFISCSI_SESSION_DEBUG(cs, "got %zd bytes of immediate data, need %zd", 2583 io->scsiio.ext_data_filled, io->scsiio.kern_data_len); 2584#endif 2585 } 2586 2587 CFISCSI_SESSION_LOCK(cs); 2588 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2589 CFISCSI_SESSION_UNLOCK(cs); 2590 2591 /* 2592 * XXX: We should limit the number of outstanding R2T PDUs 2593 * per task to MaxOutstandingR2T. 2594 */ 2595 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2596 if (response == NULL) { 2597 CFISCSI_SESSION_WARN(cs, "failed to " 2598 "allocate memory; dropping connection"); 2599 ctl_set_busy(&io->scsiio); 2600 io->scsiio.be_move_done(io); 2601 cfiscsi_session_terminate(cs); 2602 return; 2603 } 2604 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2605 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2606 bhsr2t->bhsr2t_flags = 0x80; 2607 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2608 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2609 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2610 /* 2611 * XXX: Here we assume that cfiscsi_datamove() won't ever 2612 * be running concurrently on several CPUs for a given 2613 * command. 2614 */ 2615 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2616 PDU_R2TSN(request)++; 2617 /* 2618 * This is the offset within the current SCSI command; 2619 * i.e. for the first call of datamove(), it will be 0, 2620 * and for subsequent ones it will be the sum of lengths 2621 * of previous ones. 2622 * 2623 * The ext_data_filled is to account for unsolicited 2624 * (immediate) data that might have already arrived. 2625 */ 2626 bhsr2t->bhsr2t_buffer_offset = 2627 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2628 /* 2629 * This is the total length (sum of S/G lengths) this call 2630 * to cfiscsi_datamove() is supposed to handle. 2631 * 2632 * XXX: Limit it to MaxBurstLength. 2633 */ 2634 bhsr2t->bhsr2t_desired_data_transfer_length = 2635 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2636 cfiscsi_pdu_queue(response); 2637} 2638 2639static void 2640cfiscsi_datamove(union ctl_io *io) 2641{ 2642 2643 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2644 cfiscsi_datamove_in(io); 2645 else 2646 cfiscsi_datamove_out(io); 2647} 2648 2649static void 2650cfiscsi_scsi_command_done(union ctl_io *io) 2651{ 2652 struct icl_pdu *request, *response; 2653 struct iscsi_bhs_scsi_command *bhssc; 2654 struct iscsi_bhs_scsi_response *bhssr; 2655#ifdef DIAGNOSTIC 2656 struct cfiscsi_data_wait *cdw; 2657#endif 2658 struct cfiscsi_session *cs; 2659 uint16_t sense_length; 2660 2661 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2662 cs = PDU_SESSION(request); 2663 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2664 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2665 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2666 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2667 2668 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2669 // bhssc->bhssc_initiator_task_tag); 2670 2671#ifdef DIAGNOSTIC 2672 CFISCSI_SESSION_LOCK(cs); 2673 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2674 KASSERT(bhssc->bhssc_initiator_task_tag != 2675 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2676 CFISCSI_SESSION_UNLOCK(cs); 2677#endif 2678 2679 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2680 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2681 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2682 bhssr->bhssr_flags = 0x80; 2683 /* 2684 * XXX: We don't deal with bidirectional under/overflows; 2685 * does anything actually support those? 2686 */ 2687 if (PDU_TOTAL_TRANSFER_LEN(request) < 2688 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2689 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2690 bhssr->bhssr_residual_count = 2691 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2692 PDU_TOTAL_TRANSFER_LEN(request)); 2693 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2694 // ntohl(bhssr->bhssr_residual_count)); 2695 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2696 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2697 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2698 bhssr->bhssr_residual_count = 2699 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2700 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2701 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2702 // ntohl(bhssr->bhssr_residual_count)); 2703 } 2704 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2705 bhssr->bhssr_status = io->scsiio.scsi_status; 2706 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2707 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2708 2709 if (io->scsiio.sense_len > 0) { 2710#if 0 2711 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2712 io->scsiio.sense_len); 2713#endif 2714 sense_length = htons(io->scsiio.sense_len); 2715 icl_pdu_append_data(response, 2716 &sense_length, sizeof(sense_length), M_WAITOK); 2717 icl_pdu_append_data(response, 2718 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2719 } 2720 2721 ctl_free_io(io); 2722 icl_pdu_free(request); 2723 cfiscsi_pdu_queue(response); 2724} 2725 2726static void 2727cfiscsi_task_management_done(union ctl_io *io) 2728{ 2729 struct icl_pdu *request, *response; 2730 struct iscsi_bhs_task_management_request *bhstmr; 2731 struct iscsi_bhs_task_management_response *bhstmr2; 2732 struct cfiscsi_data_wait *cdw, *tmpcdw; 2733 struct cfiscsi_session *cs; 2734 2735 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2736 cs = PDU_SESSION(request); 2737 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2738 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2739 ISCSI_BHS_OPCODE_TASK_REQUEST, 2740 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2741 2742#if 0 2743 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2744 bhstmr->bhstmr_initiator_task_tag, 2745 bhstmr->bhstmr_referenced_task_tag); 2746#endif 2747 2748 if ((bhstmr->bhstmr_function & ~0x80) == 2749 BHSTMR_FUNCTION_ABORT_TASK) { 2750 /* 2751 * Make sure we no longer wait for Data-Out for this command. 2752 */ 2753 CFISCSI_SESSION_LOCK(cs); 2754 TAILQ_FOREACH_SAFE(cdw, 2755 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2756 if (bhstmr->bhstmr_referenced_task_tag != 2757 cdw->cdw_initiator_task_tag) 2758 continue; 2759 2760#if 0 2761 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2762 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2763#endif 2764 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2765 cdw, cdw_next); 2766 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2767 uma_zfree(cfiscsi_data_wait_zone, cdw); 2768 } 2769 CFISCSI_SESSION_UNLOCK(cs); 2770 } 2771 2772 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2773 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2774 response->ip_bhs; 2775 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2776 bhstmr2->bhstmr_flags = 0x80; 2777 if (io->io_hdr.status == CTL_SUCCESS) { 2778 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2779 } else { 2780 /* 2781 * XXX: How to figure out what exactly went wrong? iSCSI spec 2782 * expects us to provide detailed error, e.g. "Task does 2783 * not exist" or "LUN does not exist". 2784 */ 2785 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2786 bhstmr2->bhstmr_response = 2787 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2788 } 2789 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2790 2791 ctl_free_io(io); 2792 icl_pdu_free(request); 2793 cfiscsi_pdu_queue(response); 2794} 2795 2796static void 2797cfiscsi_done(union ctl_io *io) 2798{ 2799 struct icl_pdu *request; 2800 struct cfiscsi_session *cs; 2801 2802 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2803 ("invalid CTL status %#x", io->io_hdr.status)); 2804 2805 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2806 if (request == NULL) { 2807 /* 2808 * Implicit task termination has just completed; nothing to do. 2809 */ 2810 return; 2811 } 2812 2813 cs = PDU_SESSION(request); 2814 refcount_release(&cs->cs_outstanding_ctl_pdus); 2815 2816 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2817 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2818 cfiscsi_scsi_command_done(io); 2819 break; 2820 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2821 cfiscsi_task_management_done(io); 2822 break; 2823 default: 2824 panic("cfiscsi_done called with wrong opcode 0x%x", 2825 request->ip_bhs->bhs_opcode); 2826 } 2827} 2828