ctl_frontend_iscsi.c revision 274795
1177633Sdfr/*- 2177633Sdfr * Copyright (c) 2012 The FreeBSD Foundation 3177633Sdfr * All rights reserved. 4261046Smav * 5261046Smav * This software was developed by Edward Tomasz Napierala under sponsorship 6261046Smav * from the FreeBSD Foundation. 7177633Sdfr * 8261046Smav * Redistribution and use in source and binary forms, with or without 9261046Smav * modification, are permitted provided that the following conditions 10261046Smav * are met: 11261046Smav * 1. Redistributions of source code must retain the above copyright 12261046Smav * notice, this list of conditions and the following disclaimer. 13261046Smav * 2. Redistributions in binary form must reproduce the above copyright 14261046Smav * notice, this list of conditions and the following disclaimer in the 15261046Smav * documentation and/or other materials provided with the distribution. 16261046Smav * 17261046Smav * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18261046Smav * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19261046Smav * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20261046Smav * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21261046Smav * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22261046Smav * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23261046Smav * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24261046Smav * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25261046Smav * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26261046Smav * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27261046Smav * SUCH DAMAGE. 28261046Smav * 29261046Smav * $FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 274795 2014-11-21 15:38:31Z mav $ 30177633Sdfr */ 31177633Sdfr 32177633Sdfr/* 33177633Sdfr * CTL frontend for the iSCSI protocol. 34177633Sdfr */ 35177633Sdfr 36177633Sdfr#include <sys/cdefs.h> 37177633Sdfr__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 274795 2014-11-21 15:38:31Z mav $"); 38177633Sdfr 39177633Sdfr#include <sys/param.h> 40177633Sdfr#include <sys/capsicum.h> 41177633Sdfr#include <sys/condvar.h> 42177633Sdfr#include <sys/file.h> 43177633Sdfr#include <sys/kernel.h> 44177633Sdfr#include <sys/kthread.h> 45177633Sdfr#include <sys/lock.h> 46177633Sdfr#include <sys/malloc.h> 47177633Sdfr#include <sys/module.h> 48177633Sdfr#include <sys/mutex.h> 49177633Sdfr#include <sys/queue.h> 50177633Sdfr#include <sys/sbuf.h> 51177633Sdfr#include <sys/sysctl.h> 52177633Sdfr#include <sys/systm.h> 53177633Sdfr#include <sys/uio.h> 54177633Sdfr#include <sys/unistd.h> 55177633Sdfr#include <vm/uma.h> 56177633Sdfr 57177633Sdfr#include <cam/scsi/scsi_all.h> 58177633Sdfr#include <cam/scsi/scsi_da.h> 59177633Sdfr#include <cam/ctl/ctl_io.h> 60177633Sdfr#include <cam/ctl/ctl.h> 61177633Sdfr#include <cam/ctl/ctl_backend.h> 62177633Sdfr#include <cam/ctl/ctl_error.h> 63177633Sdfr#include <cam/ctl/ctl_frontend.h> 64177633Sdfr#include <cam/ctl/ctl_frontend_internal.h> 65177633Sdfr#include <cam/ctl/ctl_debug.h> 66177633Sdfr#include <cam/ctl/ctl_ha.h> 67177633Sdfr#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 <cam/ctl/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 = 1; 88SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 89 &debug, 1, "Enable debug messages"); 90static int ping_timeout = 5; 91SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 92 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 93static int login_timeout = 60; 94SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 95 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 96static int maxcmdsn_delta = 256; 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 98 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 99 "without confirmation"); 100 101#define CFISCSI_DEBUG(X, ...) \ 102 do { \ 103 if (debug > 1) { \ 104 printf("%s: " X "\n", \ 105 __func__, ## __VA_ARGS__); \ 106 } \ 107 } while (0) 108 109#define CFISCSI_WARN(X, ...) \ 110 do { \ 111 if (debug > 0) { \ 112 printf("WARNING: %s: " X "\n", \ 113 __func__, ## __VA_ARGS__); \ 114 } \ 115 } while (0) 116 117#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 118 do { \ 119 if (debug > 1) { \ 120 printf("%s: %s (%s): " X "\n", \ 121 __func__, S->cs_initiator_addr, \ 122 S->cs_initiator_name, ## __VA_ARGS__); \ 123 } \ 124 } while (0) 125 126#define CFISCSI_SESSION_WARN(S, X, ...) \ 127 do { \ 128 if (debug > 0) { \ 129 printf("WARNING: %s (%s): " X "\n", \ 130 S->cs_initiator_addr, \ 131 S->cs_initiator_name, ## __VA_ARGS__); \ 132 } \ 133 } while (0) 134 135#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 136#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 137#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 138 139#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 140#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 141#define PDU_EXPDATASN(X) (X)->ip_prv0 142#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 143#define PDU_R2TSN(X) (X)->ip_prv2 144 145int cfiscsi_init(void); 146static void cfiscsi_online(void *arg); 147static void cfiscsi_offline(void *arg); 148static int cfiscsi_info(void *arg, struct sbuf *sb); 149static int cfiscsi_lun_enable(void *arg, 150 struct ctl_id target_id, int lun_id); 151static int cfiscsi_lun_disable(void *arg, 152 struct ctl_id target_id, int lun_id); 153static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 154static int cfiscsi_ioctl(struct cdev *dev, 155 u_long cmd, caddr_t addr, int flag, struct thread *td); 156static void cfiscsi_datamove(union ctl_io *io); 157static void cfiscsi_datamove_in(union ctl_io *io); 158static void cfiscsi_datamove_out(union ctl_io *io); 159static void cfiscsi_done(union ctl_io *io); 160static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 161static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 162static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 163static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 164static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 165static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 166static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 167static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 168 *softc, const char *name); 169static struct cfiscsi_target *cfiscsi_target_find_or_create( 170 struct cfiscsi_softc *softc, const char *name, const char *alias); 171static void cfiscsi_target_release(struct cfiscsi_target *ct); 172static void cfiscsi_session_delete(struct cfiscsi_session *cs); 173 174static struct cfiscsi_softc cfiscsi_softc; 175extern struct ctl_softc *control_softc; 176 177static struct ctl_frontend cfiscsi_frontend = 178{ 179 .name = "iscsi", 180 .init = cfiscsi_init, 181 .ioctl = cfiscsi_ioctl, 182}; 183CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 184MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 185 186static struct icl_pdu * 187cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 188{ 189 190 return (icl_pdu_new(request->ip_conn, flags)); 191} 192 193static bool 194cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 195{ 196 const struct iscsi_bhs_scsi_command *bhssc; 197 struct cfiscsi_session *cs; 198 uint32_t cmdsn, expstatsn; 199 200 cs = PDU_SESSION(request); 201 202 /* 203 * Every incoming PDU - not just NOP-Out - resets the ping timer. 204 * The purpose of the timeout is to reset the connection when it stalls; 205 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 206 * in some queue. 207 * 208 * XXX: Locking? 209 */ 210 cs->cs_timeout = 0; 211 212 /* 213 * Data-Out PDUs don't contain CmdSN. 214 */ 215 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 216 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 217 return (false); 218 219 /* 220 * We're only using fields common for all the request 221 * (initiator -> target) PDUs. 222 */ 223 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 224 cmdsn = ntohl(bhssc->bhssc_cmdsn); 225 expstatsn = ntohl(bhssc->bhssc_expstatsn); 226 227 CFISCSI_SESSION_LOCK(cs); 228#if 0 229 if (expstatsn != cs->cs_statsn) { 230 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 231 "while current StatSN is %d", expstatsn, 232 cs->cs_statsn); 233 } 234#endif 235 236 /* 237 * The target MUST silently ignore any non-immediate command outside 238 * of this range. 239 */ 240 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 241 CFISCSI_SESSION_UNLOCK(cs); 242 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 243 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 244 return (true); 245 } 246 247 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 248 cs->cs_cmdsn++; 249 250 CFISCSI_SESSION_UNLOCK(cs); 251 252 return (false); 253} 254 255static void 256cfiscsi_pdu_handle(struct icl_pdu *request) 257{ 258 struct cfiscsi_session *cs; 259 bool ignore; 260 261 cs = PDU_SESSION(request); 262 263 ignore = cfiscsi_pdu_update_cmdsn(request); 264 if (ignore) { 265 icl_pdu_free(request); 266 return; 267 } 268 269 /* 270 * Handle the PDU; this includes e.g. receiving the remaining 271 * part of PDU and submitting the SCSI command to CTL 272 * or queueing a reply. The handling routine is responsible 273 * for freeing the PDU when it's no longer needed. 274 */ 275 switch (request->ip_bhs->bhs_opcode & 276 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 277 case ISCSI_BHS_OPCODE_NOP_OUT: 278 cfiscsi_pdu_handle_nop_out(request); 279 break; 280 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 281 cfiscsi_pdu_handle_scsi_command(request); 282 break; 283 case ISCSI_BHS_OPCODE_TASK_REQUEST: 284 cfiscsi_pdu_handle_task_request(request); 285 break; 286 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 287 cfiscsi_pdu_handle_data_out(request); 288 break; 289 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 290 cfiscsi_pdu_handle_logout_request(request); 291 break; 292 default: 293 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 294 "opcode 0x%x; dropping connection", 295 request->ip_bhs->bhs_opcode); 296 icl_pdu_free(request); 297 cfiscsi_session_terminate(cs); 298 } 299 300} 301 302static void 303cfiscsi_receive_callback(struct icl_pdu *request) 304{ 305 struct cfiscsi_session *cs; 306 307 cs = PDU_SESSION(request); 308 309#ifdef ICL_KERNEL_PROXY 310 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 311 if (cs->cs_login_pdu == NULL) 312 cs->cs_login_pdu = request; 313 else 314 icl_pdu_free(request); 315 cv_signal(&cs->cs_login_cv); 316 return; 317 } 318#endif 319 320 cfiscsi_pdu_handle(request); 321} 322 323static void 324cfiscsi_error_callback(struct icl_conn *ic) 325{ 326 struct cfiscsi_session *cs; 327 328 cs = CONN_SESSION(ic); 329 330 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 331 cfiscsi_session_terminate(cs); 332} 333 334static int 335cfiscsi_pdu_prepare(struct icl_pdu *response) 336{ 337 struct cfiscsi_session *cs; 338 struct iscsi_bhs_scsi_response *bhssr; 339 bool advance_statsn = true; 340 341 cs = PDU_SESSION(response); 342 343 CFISCSI_SESSION_LOCK_ASSERT(cs); 344 345 /* 346 * We're only using fields common for all the response 347 * (target -> initiator) PDUs. 348 */ 349 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 350 351 /* 352 * 10.8.3: "The StatSN for this connection is not advanced 353 * after this PDU is sent." 354 */ 355 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 356 advance_statsn = false; 357 358 /* 359 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 360 * StatSN for the connection is not advanced after this PDU is sent." 361 */ 362 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 363 bhssr->bhssr_initiator_task_tag == 0xffffffff) 364 advance_statsn = false; 365 366 /* 367 * See the comment below - StatSN is not meaningful and must 368 * not be advanced. 369 */ 370 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 371 advance_statsn = false; 372 373 /* 374 * 10.7.3: "The fields StatSN, Status, and Residual Count 375 * only have meaningful content if the S bit is set to 1." 376 */ 377 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 378 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 379 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 380 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 381 382 if (advance_statsn) 383 cs->cs_statsn++; 384 385 return (0); 386} 387 388static void 389cfiscsi_pdu_queue(struct icl_pdu *response) 390{ 391 struct cfiscsi_session *cs; 392 393 cs = PDU_SESSION(response); 394 395 CFISCSI_SESSION_LOCK(cs); 396 cfiscsi_pdu_prepare(response); 397 icl_pdu_queue(response); 398 CFISCSI_SESSION_UNLOCK(cs); 399} 400 401static uint32_t 402cfiscsi_decode_lun(uint64_t encoded) 403{ 404 uint8_t lun[8]; 405 uint32_t result; 406 407 /* 408 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 409 * but is in fact an evil, multidimensional structure defined 410 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 411 */ 412 memcpy(lun, &encoded, sizeof(lun)); 413 switch (lun[0] & 0xC0) { 414 case 0x00: 415 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 416 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 417 CFISCSI_WARN("malformed LUN " 418 "(peripheral device addressing method): 0x%jx", 419 (uintmax_t)encoded); 420 result = 0xffffffff; 421 break; 422 } 423 result = lun[1]; 424 break; 425 case 0x40: 426 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 427 lun[6] != 0 || lun[7] != 0) { 428 CFISCSI_WARN("malformed LUN " 429 "(flat address space addressing method): 0x%jx", 430 (uintmax_t)encoded); 431 result = 0xffffffff; 432 break; 433 } 434 result = ((lun[0] & 0x3f) << 8) + lun[1]; 435 break; 436 case 0xC0: 437 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 438 lun[6] != 0 || lun[7] != 0) { 439 CFISCSI_WARN("malformed LUN (extended flat " 440 "address space addressing method): 0x%jx", 441 (uintmax_t)encoded); 442 result = 0xffffffff; 443 break; 444 } 445 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 446 default: 447 CFISCSI_WARN("unsupported LUN format 0x%jx", 448 (uintmax_t)encoded); 449 result = 0xffffffff; 450 break; 451 } 452 453 return (result); 454} 455 456static void 457cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 458{ 459 struct cfiscsi_session *cs; 460 struct iscsi_bhs_nop_out *bhsno; 461 struct iscsi_bhs_nop_in *bhsni; 462 struct icl_pdu *response; 463 void *data = NULL; 464 size_t datasize; 465 int error; 466 467 cs = PDU_SESSION(request); 468 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 469 470 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 471 /* 472 * Nothing to do, iscsi_pdu_update_statsn() already 473 * zeroed the timeout. 474 */ 475 icl_pdu_free(request); 476 return; 477 } 478 479 datasize = icl_pdu_data_segment_length(request); 480 if (datasize > 0) { 481 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 482 if (data == NULL) { 483 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 484 "dropping connection"); 485 icl_pdu_free(request); 486 cfiscsi_session_terminate(cs); 487 return; 488 } 489 icl_pdu_get_data(request, 0, data, datasize); 490 } 491 492 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 493 if (response == NULL) { 494 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 495 "droppping connection"); 496 free(data, M_CFISCSI); 497 icl_pdu_free(request); 498 cfiscsi_session_terminate(cs); 499 return; 500 } 501 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 502 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 503 bhsni->bhsni_flags = 0x80; 504 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 505 bhsni->bhsni_target_transfer_tag = 0xffffffff; 506 if (datasize > 0) { 507 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 508 if (error != 0) { 509 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 510 "dropping connection"); 511 free(data, M_CFISCSI); 512 icl_pdu_free(request); 513 icl_pdu_free(response); 514 cfiscsi_session_terminate(cs); 515 return; 516 } 517 free(data, M_CFISCSI); 518 } 519 520 icl_pdu_free(request); 521 cfiscsi_pdu_queue(response); 522} 523 524static void 525cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 526{ 527 struct iscsi_bhs_scsi_command *bhssc; 528 struct cfiscsi_session *cs; 529 union ctl_io *io; 530 int error; 531 532 cs = PDU_SESSION(request); 533 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 534 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 535 // bhssc->bhssc_initiator_task_tag); 536 537 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 538 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 539 "ImmediateData=No; dropping connection"); 540 icl_pdu_free(request); 541 cfiscsi_session_terminate(cs); 542 return; 543 } 544 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 545 if (io == NULL) { 546 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 547 "dropping connection"); 548 icl_pdu_free(request); 549 cfiscsi_session_terminate(cs); 550 return; 551 } 552 ctl_zero_io(io); 553 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 554 io->io_hdr.io_type = CTL_IO_SCSI; 555 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 556 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 557 io->io_hdr.nexus.targ_target.id = 0; 558 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 559 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 560 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 561 case BHSSC_FLAGS_ATTR_UNTAGGED: 562 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 563 break; 564 case BHSSC_FLAGS_ATTR_SIMPLE: 565 io->scsiio.tag_type = CTL_TAG_SIMPLE; 566 break; 567 case BHSSC_FLAGS_ATTR_ORDERED: 568 io->scsiio.tag_type = CTL_TAG_ORDERED; 569 break; 570 case BHSSC_FLAGS_ATTR_HOQ: 571 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 572 break; 573 case BHSSC_FLAGS_ATTR_ACA: 574 io->scsiio.tag_type = CTL_TAG_ACA; 575 break; 576 default: 577 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 578 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 579 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 580 break; 581 } 582 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 583 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 584 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 585 error = ctl_queue(io); 586 if (error != CTL_RETVAL_COMPLETE) { 587 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 588 "dropping connection", error); 589 ctl_free_io(io); 590 refcount_release(&cs->cs_outstanding_ctl_pdus); 591 icl_pdu_free(request); 592 cfiscsi_session_terminate(cs); 593 } 594} 595 596static void 597cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 598{ 599 struct iscsi_bhs_task_management_request *bhstmr; 600 struct iscsi_bhs_task_management_response *bhstmr2; 601 struct icl_pdu *response; 602 struct cfiscsi_session *cs; 603 union ctl_io *io; 604 int error; 605 606 cs = PDU_SESSION(request); 607 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 608 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 609 if (io == NULL) { 610 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 611 "dropping connection"); 612 icl_pdu_free(request); 613 cfiscsi_session_terminate(cs); 614 return; 615 } 616 ctl_zero_io(io); 617 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 618 io->io_hdr.io_type = CTL_IO_TASK; 619 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 620 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 621 io->io_hdr.nexus.targ_target.id = 0; 622 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 623 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 624 625 switch (bhstmr->bhstmr_function & ~0x80) { 626 case BHSTMR_FUNCTION_ABORT_TASK: 627#if 0 628 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 629#endif 630 io->taskio.task_action = CTL_TASK_ABORT_TASK; 631 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 632 break; 633 case BHSTMR_FUNCTION_ABORT_TASK_SET: 634#if 0 635 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 636#endif 637 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 638 break; 639 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 640#if 0 641 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 642#endif 643 io->taskio.task_action = CTL_TASK_LUN_RESET; 644 break; 645 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 646#if 0 647 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 648#endif 649 io->taskio.task_action = CTL_TASK_TARGET_RESET; 650 break; 651 default: 652 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 653 bhstmr->bhstmr_function & ~0x80); 654 ctl_free_io(io); 655 656 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 657 if (response == NULL) { 658 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 659 "dropping connection"); 660 icl_pdu_free(request); 661 cfiscsi_session_terminate(cs); 662 return; 663 } 664 bhstmr2 = (struct iscsi_bhs_task_management_response *) 665 response->ip_bhs; 666 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 667 bhstmr2->bhstmr_flags = 0x80; 668 bhstmr2->bhstmr_response = 669 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 670 bhstmr2->bhstmr_initiator_task_tag = 671 bhstmr->bhstmr_initiator_task_tag; 672 icl_pdu_free(request); 673 cfiscsi_pdu_queue(response); 674 return; 675 } 676 677 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 678 error = ctl_queue(io); 679 if (error != CTL_RETVAL_COMPLETE) { 680 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 681 "dropping connection", error); 682 ctl_free_io(io); 683 refcount_release(&cs->cs_outstanding_ctl_pdus); 684 icl_pdu_free(request); 685 cfiscsi_session_terminate(cs); 686 } 687} 688 689static bool 690cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 691{ 692 struct iscsi_bhs_data_out *bhsdo; 693 struct cfiscsi_session *cs; 694 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 695 size_t copy_len, len, off, buffer_offset; 696 int ctl_sg_count; 697 union ctl_io *io; 698 699 cs = PDU_SESSION(request); 700 701 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 702 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 703 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 704 ISCSI_BHS_OPCODE_SCSI_COMMAND, 705 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 706 707 /* 708 * We're only using fields common for Data-Out and SCSI Command PDUs. 709 */ 710 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 711 712 io = cdw->cdw_ctl_io; 713 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 714 ("CTL_FLAG_DATA_IN")); 715 716#if 0 717 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 718 request->ip_data_len, io->scsiio.kern_total_len); 719#endif 720 721 if (io->scsiio.kern_sg_entries > 0) { 722 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 723 ctl_sg_count = io->scsiio.kern_sg_entries; 724 } else { 725 ctl_sglist = &ctl_sg_entry; 726 ctl_sglist->addr = io->scsiio.kern_data_ptr; 727 ctl_sglist->len = io->scsiio.kern_data_len; 728 ctl_sg_count = 1; 729 } 730 731 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 732 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 733 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 734 else 735 buffer_offset = 0; 736 len = icl_pdu_data_segment_length(request); 737 738 /* 739 * Make sure the offset, as sent by the initiator, matches the offset 740 * we're supposed to be at in the scatter-gather list. 741 */ 742 if (buffer_offset > 743 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 744 buffer_offset + len <= 745 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 746 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 747 "expected %zd; dropping connection", buffer_offset, 748 (size_t)io->scsiio.kern_rel_offset + 749 (size_t)io->scsiio.ext_data_filled); 750 ctl_set_data_phase_error(&io->scsiio); 751 cfiscsi_session_terminate(cs); 752 return (true); 753 } 754 755 /* 756 * This is the offset within the PDU data segment, as opposed 757 * to buffer_offset, which is the offset within the task (SCSI 758 * command). 759 */ 760 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 761 buffer_offset; 762 763 /* 764 * Iterate over the scatter/gather segments, filling them with data 765 * from the PDU data segment. Note that this can get called multiple 766 * times for one SCSI command; the cdw structure holds state for the 767 * scatter/gather list. 768 */ 769 for (;;) { 770 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 771 ("cdw->cdw_sg_index >= ctl_sg_count")); 772 if (cdw->cdw_sg_len == 0) { 773 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 774 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 775 } 776 KASSERT(off <= len, ("len > off")); 777 copy_len = len - off; 778 if (copy_len > cdw->cdw_sg_len) 779 copy_len = cdw->cdw_sg_len; 780 781 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 782 cdw->cdw_sg_addr += copy_len; 783 cdw->cdw_sg_len -= copy_len; 784 off += copy_len; 785 io->scsiio.ext_data_filled += copy_len; 786 787 if (cdw->cdw_sg_len == 0) { 788 /* 789 * End of current segment. 790 */ 791 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 792 /* 793 * Last segment in scatter/gather list. 794 */ 795 break; 796 } 797 cdw->cdw_sg_index++; 798 } 799 800 if (off == len) { 801 /* 802 * End of PDU payload. 803 */ 804 break; 805 } 806 } 807 808 if (len > off) { 809 /* 810 * In case of unsolicited data, it's possible that the buffer 811 * provided by CTL is smaller than negotiated FirstBurstLength. 812 * Just ignore the superfluous data; will ask for them with R2T 813 * on next call to cfiscsi_datamove(). 814 * 815 * This obviously can only happen with SCSI Command PDU. 816 */ 817 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 818 ISCSI_BHS_OPCODE_SCSI_COMMAND) 819 return (true); 820 821 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 822 "expected %zd; dropping connection", 823 icl_pdu_data_segment_length(request), off); 824 ctl_set_data_phase_error(&io->scsiio); 825 cfiscsi_session_terminate(cs); 826 return (true); 827 } 828 829 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 830 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 831 CFISCSI_SESSION_WARN(cs, "got the final packet without " 832 "the F flag; flags = 0x%x; dropping connection", 833 bhsdo->bhsdo_flags); 834 ctl_set_data_phase_error(&io->scsiio); 835 cfiscsi_session_terminate(cs); 836 return (true); 837 } 838 839 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 840 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 841 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 842 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 843 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 844 "transmitted size was %zd bytes instead of %d; " 845 "dropping connection", 846 (size_t)io->scsiio.ext_data_filled, 847 cdw->cdw_r2t_end); 848 ctl_set_data_phase_error(&io->scsiio); 849 cfiscsi_session_terminate(cs); 850 return (true); 851 } else { 852 /* 853 * For SCSI Command PDU, this just means we need to 854 * solicit more data by sending R2T. 855 */ 856 return (false); 857 } 858 } 859 860 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 861#if 0 862 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 863 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 864#endif 865 866 return (true); 867 } 868 869 return (false); 870} 871 872static void 873cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 874{ 875 struct iscsi_bhs_data_out *bhsdo; 876 struct cfiscsi_session *cs; 877 struct cfiscsi_data_wait *cdw = NULL; 878 union ctl_io *io; 879 bool done; 880 881 cs = PDU_SESSION(request); 882 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 883 884 CFISCSI_SESSION_LOCK(cs); 885 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 886#if 0 887 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 888 "ttt 0x%x, itt 0x%x", 889 bhsdo->bhsdo_target_transfer_tag, 890 bhsdo->bhsdo_initiator_task_tag, 891 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 892#endif 893 if (bhsdo->bhsdo_target_transfer_tag == 894 cdw->cdw_target_transfer_tag) 895 break; 896 } 897 CFISCSI_SESSION_UNLOCK(cs); 898 if (cdw == NULL) { 899 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 900 "0x%x, not found; dropping connection", 901 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 902 icl_pdu_free(request); 903 cfiscsi_session_terminate(cs); 904 return; 905 } 906 907 io = cdw->cdw_ctl_io; 908 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 909 ("CTL_FLAG_DATA_IN")); 910 911 done = cfiscsi_handle_data_segment(request, cdw); 912 if (done) { 913 CFISCSI_SESSION_LOCK(cs); 914 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 915 CFISCSI_SESSION_UNLOCK(cs); 916 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 917 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 918 uma_zfree(cfiscsi_data_wait_zone, cdw); 919 if (done) 920 io->scsiio.be_move_done(io); 921 else 922 cfiscsi_datamove_out(io); 923 } 924 925 icl_pdu_free(request); 926} 927 928static void 929cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 930{ 931 struct iscsi_bhs_logout_request *bhslr; 932 struct iscsi_bhs_logout_response *bhslr2; 933 struct icl_pdu *response; 934 struct cfiscsi_session *cs; 935 936 cs = PDU_SESSION(request); 937 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 938 switch (bhslr->bhslr_reason & 0x7f) { 939 case BHSLR_REASON_CLOSE_SESSION: 940 case BHSLR_REASON_CLOSE_CONNECTION: 941 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 942 if (response == NULL) { 943 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 944 icl_pdu_free(request); 945 cfiscsi_session_terminate(cs); 946 return; 947 } 948 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 949 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 950 bhslr2->bhslr_flags = 0x80; 951 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 952 bhslr2->bhslr_initiator_task_tag = 953 bhslr->bhslr_initiator_task_tag; 954 icl_pdu_free(request); 955 cfiscsi_pdu_queue(response); 956 cfiscsi_session_terminate(cs); 957 break; 958 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 959 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 960 if (response == NULL) { 961 CFISCSI_SESSION_WARN(cs, 962 "failed to allocate memory; dropping connection"); 963 icl_pdu_free(request); 964 cfiscsi_session_terminate(cs); 965 return; 966 } 967 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 968 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 969 bhslr2->bhslr_flags = 0x80; 970 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 971 bhslr2->bhslr_initiator_task_tag = 972 bhslr->bhslr_initiator_task_tag; 973 icl_pdu_free(request); 974 cfiscsi_pdu_queue(response); 975 break; 976 default: 977 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 978 bhslr->bhslr_reason); 979 icl_pdu_free(request); 980 cfiscsi_session_terminate(cs); 981 break; 982 } 983} 984 985static void 986cfiscsi_callout(void *context) 987{ 988 struct icl_pdu *cp; 989 struct iscsi_bhs_nop_in *bhsni; 990 struct cfiscsi_session *cs; 991 992 cs = context; 993 994 if (cs->cs_terminating) 995 return; 996 997 callout_schedule(&cs->cs_callout, 1 * hz); 998 999 atomic_add_int(&cs->cs_timeout, 1); 1000 1001#ifdef ICL_KERNEL_PROXY 1002 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1003 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1004 CFISCSI_SESSION_WARN(cs, "login timed out after " 1005 "%d seconds; dropping connection", cs->cs_timeout); 1006 cfiscsi_session_terminate(cs); 1007 } 1008 return; 1009 } 1010#endif 1011 1012 if (ping_timeout <= 0) { 1013 /* 1014 * Pings are disabled. Don't send NOP-In in this case; 1015 * user might have disabled pings to work around problems 1016 * with certain initiators that can't properly handle 1017 * NOP-In, such as iPXE. Reset the timeout, to avoid 1018 * triggering reconnection, should the user decide to 1019 * reenable them. 1020 */ 1021 cs->cs_timeout = 0; 1022 return; 1023 } 1024 1025 if (cs->cs_timeout >= ping_timeout) { 1026 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1027 "dropping connection", ping_timeout); 1028 cfiscsi_session_terminate(cs); 1029 return; 1030 } 1031 1032 /* 1033 * If the ping was reset less than one second ago - which means 1034 * that we've received some PDU during the last second - assume 1035 * the traffic flows correctly and don't bother sending a NOP-Out. 1036 * 1037 * (It's 2 - one for one second, and one for incrementing is_timeout 1038 * earlier in this routine.) 1039 */ 1040 if (cs->cs_timeout < 2) 1041 return; 1042 1043 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1044 if (cp == NULL) { 1045 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1046 return; 1047 } 1048 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1049 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1050 bhsni->bhsni_flags = 0x80; 1051 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1052 1053 cfiscsi_pdu_queue(cp); 1054} 1055 1056static void 1057cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1058{ 1059 struct cfiscsi_data_wait *cdw; 1060 union ctl_io *io; 1061 int error, last; 1062 1063 if (cs->cs_target == NULL) 1064 return; /* No target yet, so nothing to do. */ 1065 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1066 if (io == NULL) { 1067 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1068 return; 1069 } 1070 ctl_zero_io(io); 1071 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1072 io->io_hdr.io_type = CTL_IO_TASK; 1073 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1074 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1075 io->io_hdr.nexus.targ_target.id = 0; 1076 io->io_hdr.nexus.targ_lun = 0; 1077 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1078 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1079 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1080 error = ctl_queue(io); 1081 if (error != CTL_RETVAL_COMPLETE) { 1082 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1083 refcount_release(&cs->cs_outstanding_ctl_pdus); 1084 ctl_free_io(io); 1085 } 1086 1087 CFISCSI_SESSION_LOCK(cs); 1088 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1089 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1090 CFISCSI_SESSION_UNLOCK(cs); 1091 /* 1092 * Set nonzero port status; this prevents backends from 1093 * assuming that the data transfer actually succeeded 1094 * and writing uninitialized data to disk. 1095 */ 1096 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1097 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1098 uma_zfree(cfiscsi_data_wait_zone, cdw); 1099 CFISCSI_SESSION_LOCK(cs); 1100 } 1101 CFISCSI_SESSION_UNLOCK(cs); 1102 1103 /* 1104 * Wait for CTL to terminate all the tasks. 1105 */ 1106 for (;;) { 1107 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1108 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1109 if (last != 0) 1110 break; 1111 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, " 1112 "%d remaining", cs->cs_outstanding_ctl_pdus); 1113 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1114 0, "cfiscsi_terminate", hz / 100); 1115 } 1116} 1117 1118static void 1119cfiscsi_maintenance_thread(void *arg) 1120{ 1121 struct cfiscsi_session *cs; 1122 1123 cs = arg; 1124 1125 for (;;) { 1126 CFISCSI_SESSION_LOCK(cs); 1127 if (cs->cs_terminating == false) 1128 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1129 CFISCSI_SESSION_UNLOCK(cs); 1130 1131 if (cs->cs_terminating) { 1132 1133 /* 1134 * We used to wait up to 30 seconds to deliver queued 1135 * PDUs to the initiator. We also tried hard to deliver 1136 * SCSI Responses for the aborted PDUs. We don't do 1137 * that anymore. We might need to revisit that. 1138 */ 1139 callout_drain(&cs->cs_callout); 1140 icl_conn_close(cs->cs_conn); 1141 1142 /* 1143 * At this point ICL receive thread is no longer 1144 * running; no new tasks can be queued. 1145 */ 1146 cfiscsi_session_terminate_tasks(cs); 1147 cfiscsi_session_delete(cs); 1148 kthread_exit(); 1149 return; 1150 } 1151 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1152 } 1153} 1154 1155static void 1156cfiscsi_session_terminate(struct cfiscsi_session *cs) 1157{ 1158 1159 if (cs->cs_terminating) 1160 return; 1161 cs->cs_terminating = true; 1162 cv_signal(&cs->cs_maintenance_cv); 1163#ifdef ICL_KERNEL_PROXY 1164 cv_signal(&cs->cs_login_cv); 1165#endif 1166} 1167 1168static int 1169cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1170{ 1171 struct cfiscsi_target *ct; 1172 char *name; 1173 int i; 1174 1175 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1176 1177 ct = cs->cs_target; 1178 name = strdup(cs->cs_initiator_id, M_CTL); 1179 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1180 if (i < 0) { 1181 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1182 i); 1183 cs->cs_ctl_initid = -1; 1184 return (1); 1185 } 1186 cs->cs_ctl_initid = i; 1187#if 0 1188 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1189#endif 1190 1191 return (0); 1192} 1193 1194static void 1195cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1196{ 1197 int error; 1198 1199 if (cs->cs_ctl_initid == -1) 1200 return; 1201 1202 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1203 if (error != 0) { 1204 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1205 error); 1206 } 1207 cs->cs_ctl_initid = -1; 1208} 1209 1210static struct cfiscsi_session * 1211cfiscsi_session_new(struct cfiscsi_softc *softc) 1212{ 1213 struct cfiscsi_session *cs; 1214 int error; 1215 1216 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1217 if (cs == NULL) { 1218 CFISCSI_WARN("malloc failed"); 1219 return (NULL); 1220 } 1221 cs->cs_ctl_initid = -1; 1222 1223 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1224 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1225 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1226 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1227#ifdef ICL_KERNEL_PROXY 1228 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1229#endif 1230 1231 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1232 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1233 cs->cs_conn->ic_error = cfiscsi_error_callback; 1234 cs->cs_conn->ic_prv0 = cs; 1235 1236 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1237 if (error != 0) { 1238 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1239 free(cs, M_CFISCSI); 1240 return (NULL); 1241 } 1242 1243 mtx_lock(&softc->lock); 1244 cs->cs_id = ++softc->last_session_id; 1245 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1246 mtx_unlock(&softc->lock); 1247 1248 /* 1249 * Start pinging the initiator. 1250 */ 1251 callout_init(&cs->cs_callout, 1); 1252 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1253 1254 return (cs); 1255} 1256 1257static void 1258cfiscsi_session_delete(struct cfiscsi_session *cs) 1259{ 1260 struct cfiscsi_softc *softc; 1261 1262 softc = &cfiscsi_softc; 1263 1264 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1265 ("destroying session with outstanding CTL pdus")); 1266 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1267 ("destroying session with non-empty queue")); 1268 1269 cfiscsi_session_unregister_initiator(cs); 1270 if (cs->cs_target != NULL) 1271 cfiscsi_target_release(cs->cs_target); 1272 icl_conn_close(cs->cs_conn); 1273 icl_conn_free(cs->cs_conn); 1274 1275 mtx_lock(&softc->lock); 1276 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1277 mtx_unlock(&softc->lock); 1278 1279 free(cs, M_CFISCSI); 1280} 1281 1282int 1283cfiscsi_init(void) 1284{ 1285 struct cfiscsi_softc *softc; 1286 int retval; 1287 1288 softc = &cfiscsi_softc; 1289 retval = 0; 1290 bzero(softc, sizeof(*softc)); 1291 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1292 1293#ifdef ICL_KERNEL_PROXY 1294 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1295#endif 1296 TAILQ_INIT(&softc->sessions); 1297 TAILQ_INIT(&softc->targets); 1298 1299 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1300 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1301 UMA_ALIGN_PTR, 0); 1302 1303 return (0); 1304} 1305 1306#ifdef ICL_KERNEL_PROXY 1307static void 1308cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1309{ 1310 struct cfiscsi_session *cs; 1311 1312 cs = cfiscsi_session_new(&cfiscsi_softc); 1313 if (cs == NULL) { 1314 CFISCSI_WARN("failed to create session"); 1315 return; 1316 } 1317 1318 icl_conn_handoff_sock(cs->cs_conn, so); 1319 cs->cs_initiator_sa = sa; 1320 cs->cs_portal_id = portal_id; 1321 cs->cs_waiting_for_ctld = true; 1322 cv_signal(&cfiscsi_softc.accept_cv); 1323} 1324#endif 1325 1326static void 1327cfiscsi_online(void *arg) 1328{ 1329 struct cfiscsi_softc *softc; 1330 struct cfiscsi_target *ct; 1331 int online; 1332 1333 ct = (struct cfiscsi_target *)arg; 1334 softc = ct->ct_softc; 1335 1336 mtx_lock(&softc->lock); 1337 if (ct->ct_online) { 1338 mtx_unlock(&softc->lock); 1339 return; 1340 } 1341 ct->ct_online = 1; 1342 online = softc->online++; 1343 mtx_unlock(&softc->lock); 1344 if (online > 0) 1345 return; 1346 1347#ifdef ICL_KERNEL_PROXY 1348 if (softc->listener != NULL) 1349 icl_listen_free(softc->listener); 1350 softc->listener = icl_listen_new(cfiscsi_accept); 1351#endif 1352} 1353 1354static void 1355cfiscsi_offline(void *arg) 1356{ 1357 struct cfiscsi_softc *softc; 1358 struct cfiscsi_target *ct; 1359 struct cfiscsi_session *cs; 1360 int online; 1361 1362 ct = (struct cfiscsi_target *)arg; 1363 softc = ct->ct_softc; 1364 1365 mtx_lock(&softc->lock); 1366 if (!ct->ct_online) { 1367 mtx_unlock(&softc->lock); 1368 return; 1369 } 1370 ct->ct_online = 0; 1371 online = --softc->online; 1372 1373 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1374 if (cs->cs_target == ct) 1375 cfiscsi_session_terminate(cs); 1376 } 1377 mtx_unlock(&softc->lock); 1378 if (online > 0) 1379 return; 1380 1381#ifdef ICL_KERNEL_PROXY 1382 icl_listen_free(softc->listener); 1383 softc->listener = NULL; 1384#endif 1385} 1386 1387static int 1388cfiscsi_info(void *arg, struct sbuf *sb) 1389{ 1390 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1391 int retval; 1392 1393 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1394 ct->ct_state); 1395 return (retval); 1396} 1397 1398static void 1399cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1400{ 1401 struct cfiscsi_softc *softc; 1402 struct cfiscsi_session *cs, *cs2; 1403 struct cfiscsi_target *ct; 1404 struct ctl_iscsi_handoff_params *cihp; 1405 int error; 1406 1407 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1408 softc = &cfiscsi_softc; 1409 1410 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1411 cihp->initiator_name, cihp->initiator_addr, 1412 cihp->target_name); 1413 1414 ct = cfiscsi_target_find(softc, cihp->target_name); 1415 if (ct == NULL) { 1416 ci->status = CTL_ISCSI_ERROR; 1417 snprintf(ci->error_str, sizeof(ci->error_str), 1418 "%s: target not found", __func__); 1419 return; 1420 } 1421 1422#ifdef ICL_KERNEL_PROXY 1423 if (cihp->socket > 0 && cihp->connection_id > 0) { 1424 snprintf(ci->error_str, sizeof(ci->error_str), 1425 "both socket and connection_id set"); 1426 ci->status = CTL_ISCSI_ERROR; 1427 cfiscsi_target_release(ct); 1428 return; 1429 } 1430 if (cihp->socket == 0) { 1431 mtx_lock(&cfiscsi_softc.lock); 1432 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1433 if (cs->cs_id == cihp->connection_id) 1434 break; 1435 } 1436 if (cs == NULL) { 1437 mtx_unlock(&cfiscsi_softc.lock); 1438 snprintf(ci->error_str, sizeof(ci->error_str), 1439 "connection not found"); 1440 ci->status = CTL_ISCSI_ERROR; 1441 cfiscsi_target_release(ct); 1442 return; 1443 } 1444 mtx_unlock(&cfiscsi_softc.lock); 1445 } else { 1446#endif 1447 cs = cfiscsi_session_new(softc); 1448 if (cs == NULL) { 1449 ci->status = CTL_ISCSI_ERROR; 1450 snprintf(ci->error_str, sizeof(ci->error_str), 1451 "%s: cfiscsi_session_new failed", __func__); 1452 cfiscsi_target_release(ct); 1453 return; 1454 } 1455#ifdef ICL_KERNEL_PROXY 1456 } 1457#endif 1458 1459 /* 1460 * First PDU of Full Feature phase has the same CmdSN as the last 1461 * PDU from the Login Phase received from the initiator. Thus, 1462 * the -1 below. 1463 */ 1464 cs->cs_portal_group_tag = cihp->portal_group_tag; 1465 cs->cs_cmdsn = cihp->cmdsn; 1466 cs->cs_statsn = cihp->statsn; 1467 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1468 cs->cs_max_burst_length = cihp->max_burst_length; 1469 cs->cs_immediate_data = !!cihp->immediate_data; 1470 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1471 cs->cs_conn->ic_header_crc32c = true; 1472 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1473 cs->cs_conn->ic_data_crc32c = true; 1474 1475 strlcpy(cs->cs_initiator_name, 1476 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1477 strlcpy(cs->cs_initiator_addr, 1478 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1479 strlcpy(cs->cs_initiator_alias, 1480 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1481 memcpy(cs->cs_initiator_isid, 1482 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1483 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1484 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1485 cihp->initiator_isid[0], cihp->initiator_isid[1], 1486 cihp->initiator_isid[2], cihp->initiator_isid[3], 1487 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1488 1489 mtx_lock(&softc->lock); 1490 if (ct->ct_online == 0) { 1491 mtx_unlock(&softc->lock); 1492 cfiscsi_session_terminate(cs); 1493 cfiscsi_target_release(ct); 1494 ci->status = CTL_ISCSI_ERROR; 1495 snprintf(ci->error_str, sizeof(ci->error_str), 1496 "%s: port offline", __func__); 1497 return; 1498 } 1499 cs->cs_target = ct; 1500 mtx_unlock(&softc->lock); 1501 1502 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1503restart: 1504 if (!cs->cs_terminating) { 1505 mtx_lock(&softc->lock); 1506 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1507 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1508 cs->cs_target == cs2->cs_target && 1509 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1510 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1511 cfiscsi_session_terminate(cs2); 1512 mtx_unlock(&softc->lock); 1513 pause("cfiscsi_reinstate", 1); 1514 goto restart; 1515 } 1516 } 1517 mtx_unlock(&softc->lock); 1518 } 1519 1520 /* 1521 * Register initiator with CTL. 1522 */ 1523 cfiscsi_session_register_initiator(cs); 1524 1525#ifdef ICL_KERNEL_PROXY 1526 if (cihp->socket > 0) { 1527#endif 1528 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1529 if (error != 0) { 1530 cfiscsi_session_terminate(cs); 1531 refcount_release(&cs->cs_outstanding_ctl_pdus); 1532 ci->status = CTL_ISCSI_ERROR; 1533 snprintf(ci->error_str, sizeof(ci->error_str), 1534 "%s: icl_conn_handoff failed with error %d", 1535 __func__, error); 1536 return; 1537 } 1538#ifdef ICL_KERNEL_PROXY 1539 } 1540#endif 1541 1542#ifdef ICL_KERNEL_PROXY 1543 cs->cs_login_phase = false; 1544 1545 /* 1546 * First PDU of the Full Feature phase has likely already arrived. 1547 * We have to pick it up and execute properly. 1548 */ 1549 if (cs->cs_login_pdu != NULL) { 1550 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1551 cfiscsi_pdu_handle(cs->cs_login_pdu); 1552 cs->cs_login_pdu = NULL; 1553 } 1554#endif 1555 1556 refcount_release(&cs->cs_outstanding_ctl_pdus); 1557 ci->status = CTL_ISCSI_OK; 1558} 1559 1560static void 1561cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1562{ 1563 struct ctl_iscsi_list_params *cilp; 1564 struct cfiscsi_session *cs; 1565 struct cfiscsi_softc *softc; 1566 struct sbuf *sb; 1567 int error; 1568 1569 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1570 softc = &cfiscsi_softc; 1571 1572 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1573 if (sb == NULL) { 1574 ci->status = CTL_ISCSI_ERROR; 1575 snprintf(ci->error_str, sizeof(ci->error_str), 1576 "Unable to allocate %d bytes for iSCSI session list", 1577 cilp->alloc_len); 1578 return; 1579 } 1580 1581 sbuf_printf(sb, "<ctlislist>\n"); 1582 mtx_lock(&softc->lock); 1583 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1584#ifdef ICL_KERNEL_PROXY 1585 if (cs->cs_target == NULL) 1586 continue; 1587#endif 1588 error = sbuf_printf(sb, "<connection id=\"%d\">" 1589 "<initiator>%s</initiator>" 1590 "<initiator_addr>%s</initiator_addr>" 1591 "<initiator_alias>%s</initiator_alias>" 1592 "<target>%s</target>" 1593 "<target_alias>%s</target_alias>" 1594 "<header_digest>%s</header_digest>" 1595 "<data_digest>%s</data_digest>" 1596 "<max_data_segment_length>%zd</max_data_segment_length>" 1597 "<immediate_data>%d</immediate_data>" 1598 "<iser>%d</iser>" 1599 "</connection>\n", 1600 cs->cs_id, 1601 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1602 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1603 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1604 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1605 cs->cs_max_data_segment_length, 1606 cs->cs_immediate_data, 1607 cs->cs_conn->ic_iser); 1608 if (error != 0) 1609 break; 1610 } 1611 mtx_unlock(&softc->lock); 1612 error = sbuf_printf(sb, "</ctlislist>\n"); 1613 if (error != 0) { 1614 sbuf_delete(sb); 1615 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1616 snprintf(ci->error_str, sizeof(ci->error_str), 1617 "Out of space, %d bytes is too small", cilp->alloc_len); 1618 return; 1619 } 1620 sbuf_finish(sb); 1621 1622 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1623 cilp->fill_len = sbuf_len(sb) + 1; 1624 ci->status = CTL_ISCSI_OK; 1625 sbuf_delete(sb); 1626} 1627 1628static void 1629cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1630{ 1631 struct icl_pdu *response; 1632 struct iscsi_bhs_asynchronous_message *bhsam; 1633 struct ctl_iscsi_terminate_params *citp; 1634 struct cfiscsi_session *cs; 1635 struct cfiscsi_softc *softc; 1636 int found = 0; 1637 1638 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1639 softc = &cfiscsi_softc; 1640 1641 mtx_lock(&softc->lock); 1642 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1643 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1644 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1645 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1646 continue; 1647 1648 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1649 if (response == NULL) { 1650 /* 1651 * Oh well. Just terminate the connection. 1652 */ 1653 } else { 1654 bhsam = (struct iscsi_bhs_asynchronous_message *) 1655 response->ip_bhs; 1656 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1657 bhsam->bhsam_flags = 0x80; 1658 bhsam->bhsam_0xffffffff = 0xffffffff; 1659 bhsam->bhsam_async_event = 1660 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1661 cfiscsi_pdu_queue(response); 1662 } 1663 cfiscsi_session_terminate(cs); 1664 found++; 1665 } 1666 mtx_unlock(&softc->lock); 1667 1668 if (found == 0) { 1669 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1670 snprintf(ci->error_str, sizeof(ci->error_str), 1671 "No matching connections found"); 1672 return; 1673 } 1674 1675 ci->status = CTL_ISCSI_OK; 1676} 1677 1678static void 1679cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1680{ 1681 struct icl_pdu *response; 1682 struct iscsi_bhs_asynchronous_message *bhsam; 1683 struct ctl_iscsi_logout_params *cilp; 1684 struct cfiscsi_session *cs; 1685 struct cfiscsi_softc *softc; 1686 int found = 0; 1687 1688 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1689 softc = &cfiscsi_softc; 1690 1691 mtx_lock(&softc->lock); 1692 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1693 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1694 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1695 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1696 continue; 1697 1698 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1699 if (response == NULL) { 1700 ci->status = CTL_ISCSI_ERROR; 1701 snprintf(ci->error_str, sizeof(ci->error_str), 1702 "Unable to allocate memory"); 1703 mtx_unlock(&softc->lock); 1704 return; 1705 } 1706 bhsam = 1707 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1708 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1709 bhsam->bhsam_flags = 0x80; 1710 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1711 bhsam->bhsam_parameter3 = htons(10); 1712 cfiscsi_pdu_queue(response); 1713 found++; 1714 } 1715 mtx_unlock(&softc->lock); 1716 1717 if (found == 0) { 1718 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1719 snprintf(ci->error_str, sizeof(ci->error_str), 1720 "No matching connections found"); 1721 return; 1722 } 1723 1724 ci->status = CTL_ISCSI_OK; 1725} 1726 1727#ifdef ICL_KERNEL_PROXY 1728static void 1729cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1730{ 1731 struct ctl_iscsi_listen_params *cilp; 1732 struct sockaddr *sa; 1733 int error; 1734 1735 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1736 1737 if (cfiscsi_softc.listener == NULL) { 1738 CFISCSI_DEBUG("no listener"); 1739 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1740 ci->status = CTL_ISCSI_ERROR; 1741 return; 1742 } 1743 1744 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1745 if (error != 0) { 1746 CFISCSI_DEBUG("getsockaddr, error %d", error); 1747 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1748 ci->status = CTL_ISCSI_ERROR; 1749 return; 1750 } 1751 1752 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1753 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1754 if (error != 0) { 1755 free(sa, M_SONAME); 1756 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1757 snprintf(ci->error_str, sizeof(ci->error_str), 1758 "icl_listen_add failed, error %d", error); 1759 ci->status = CTL_ISCSI_ERROR; 1760 return; 1761 } 1762 1763 ci->status = CTL_ISCSI_OK; 1764} 1765 1766static void 1767cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1768{ 1769 struct ctl_iscsi_accept_params *ciap; 1770 struct cfiscsi_session *cs; 1771 int error; 1772 1773 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1774 1775 mtx_lock(&cfiscsi_softc.lock); 1776 for (;;) { 1777 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1778 if (cs->cs_waiting_for_ctld) 1779 break; 1780 } 1781 if (cs != NULL) 1782 break; 1783 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1784 if (error != 0) { 1785 mtx_unlock(&cfiscsi_softc.lock); 1786 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1787 ci->status = CTL_ISCSI_ERROR; 1788 return; 1789 } 1790 } 1791 mtx_unlock(&cfiscsi_softc.lock); 1792 1793 cs->cs_waiting_for_ctld = false; 1794 cs->cs_login_phase = true; 1795 1796 ciap->connection_id = cs->cs_id; 1797 ciap->portal_id = cs->cs_portal_id; 1798 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1799 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1800 cs->cs_initiator_sa->sa_len); 1801 if (error != 0) { 1802 snprintf(ci->error_str, sizeof(ci->error_str), 1803 "copyout failed with error %d", error); 1804 ci->status = CTL_ISCSI_ERROR; 1805 return; 1806 } 1807 1808 ci->status = CTL_ISCSI_OK; 1809} 1810 1811static void 1812cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1813{ 1814 struct ctl_iscsi_send_params *cisp; 1815 struct cfiscsi_session *cs; 1816 struct icl_pdu *ip; 1817 size_t datalen; 1818 void *data; 1819 int error; 1820 1821 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1822 1823 mtx_lock(&cfiscsi_softc.lock); 1824 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1825 if (cs->cs_id == cisp->connection_id) 1826 break; 1827 } 1828 if (cs == NULL) { 1829 mtx_unlock(&cfiscsi_softc.lock); 1830 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1831 ci->status = CTL_ISCSI_ERROR; 1832 return; 1833 } 1834 mtx_unlock(&cfiscsi_softc.lock); 1835 1836#if 0 1837 if (cs->cs_login_phase == false) 1838 return (EBUSY); 1839#endif 1840 1841 if (cs->cs_terminating) { 1842 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1843 ci->status = CTL_ISCSI_ERROR; 1844 return; 1845 } 1846 1847 datalen = cisp->data_segment_len; 1848 /* 1849 * XXX 1850 */ 1851 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1852 if (datalen > 65535) { 1853 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1854 ci->status = CTL_ISCSI_ERROR; 1855 return; 1856 } 1857 if (datalen > 0) { 1858 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1859 error = copyin(cisp->data_segment, data, datalen); 1860 if (error != 0) { 1861 free(data, M_CFISCSI); 1862 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1863 ci->status = CTL_ISCSI_ERROR; 1864 return; 1865 } 1866 } 1867 1868 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1869 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1870 if (datalen > 0) { 1871 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1872 free(data, M_CFISCSI); 1873 } 1874 CFISCSI_SESSION_LOCK(cs); 1875 icl_pdu_queue(ip); 1876 CFISCSI_SESSION_UNLOCK(cs); 1877 ci->status = CTL_ISCSI_OK; 1878} 1879 1880static void 1881cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1882{ 1883 struct ctl_iscsi_receive_params *cirp; 1884 struct cfiscsi_session *cs; 1885 struct icl_pdu *ip; 1886 void *data; 1887 int error; 1888 1889 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1890 1891 mtx_lock(&cfiscsi_softc.lock); 1892 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1893 if (cs->cs_id == cirp->connection_id) 1894 break; 1895 } 1896 if (cs == NULL) { 1897 mtx_unlock(&cfiscsi_softc.lock); 1898 snprintf(ci->error_str, sizeof(ci->error_str), 1899 "connection not found"); 1900 ci->status = CTL_ISCSI_ERROR; 1901 return; 1902 } 1903 mtx_unlock(&cfiscsi_softc.lock); 1904 1905#if 0 1906 if (is->is_login_phase == false) 1907 return (EBUSY); 1908#endif 1909 1910 CFISCSI_SESSION_LOCK(cs); 1911 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1912 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1913 if (error != 0) { 1914 CFISCSI_SESSION_UNLOCK(cs); 1915 snprintf(ci->error_str, sizeof(ci->error_str), 1916 "interrupted by signal"); 1917 ci->status = CTL_ISCSI_ERROR; 1918 return; 1919 } 1920 } 1921 1922 if (cs->cs_terminating) { 1923 CFISCSI_SESSION_UNLOCK(cs); 1924 snprintf(ci->error_str, sizeof(ci->error_str), 1925 "connection terminating"); 1926 ci->status = CTL_ISCSI_ERROR; 1927 return; 1928 } 1929 ip = cs->cs_login_pdu; 1930 cs->cs_login_pdu = NULL; 1931 CFISCSI_SESSION_UNLOCK(cs); 1932 1933 if (ip->ip_data_len > cirp->data_segment_len) { 1934 icl_pdu_free(ip); 1935 snprintf(ci->error_str, sizeof(ci->error_str), 1936 "data segment too big"); 1937 ci->status = CTL_ISCSI_ERROR; 1938 return; 1939 } 1940 1941 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1942 if (ip->ip_data_len > 0) { 1943 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1944 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1945 copyout(data, cirp->data_segment, ip->ip_data_len); 1946 free(data, M_CFISCSI); 1947 } 1948 1949 icl_pdu_free(ip); 1950 ci->status = CTL_ISCSI_OK; 1951} 1952 1953#endif /* !ICL_KERNEL_PROXY */ 1954 1955static void 1956cfiscsi_ioctl_port_create(struct ctl_req *req) 1957{ 1958 struct cfiscsi_target *ct; 1959 struct ctl_port *port; 1960 const char *target, *alias, *tag; 1961 struct scsi_vpd_id_descriptor *desc; 1962 ctl_options_t opts; 1963 int retval, len, idlen; 1964 1965 ctl_init_opts(&opts, req->num_args, req->kern_args); 1966 target = ctl_get_opt(&opts, "cfiscsi_target"); 1967 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1968 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1969 if (target == NULL || tag == NULL) { 1970 req->status = CTL_LUN_ERROR; 1971 snprintf(req->error_str, sizeof(req->error_str), 1972 "Missing required argument"); 1973 ctl_free_opts(&opts); 1974 return; 1975 } 1976 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1977 if (ct == NULL) { 1978 req->status = CTL_LUN_ERROR; 1979 snprintf(req->error_str, sizeof(req->error_str), 1980 "failed to create target \"%s\"", target); 1981 ctl_free_opts(&opts); 1982 return; 1983 } 1984 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1985 req->status = CTL_LUN_ERROR; 1986 snprintf(req->error_str, sizeof(req->error_str), 1987 "target \"%s\" already exists", target); 1988 cfiscsi_target_release(ct); 1989 ctl_free_opts(&opts); 1990 return; 1991 } 1992 port = &ct->ct_port; 1993 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 1994 goto done; 1995 1996 port->frontend = &cfiscsi_frontend; 1997 port->port_type = CTL_PORT_ISCSI; 1998 /* XXX KDM what should the real number be here? */ 1999 port->num_requested_ctl_io = 4096; 2000 port->port_name = "iscsi"; 2001 port->physical_port = strtoul(tag, NULL, 0); 2002 port->virtual_port = ct->ct_target_id; 2003 port->port_online = cfiscsi_online; 2004 port->port_offline = cfiscsi_offline; 2005 port->port_info = cfiscsi_info; 2006 port->onoff_arg = ct; 2007 port->lun_enable = cfiscsi_lun_enable; 2008 port->lun_disable = cfiscsi_lun_disable; 2009 port->lun_map = cfiscsi_lun_map; 2010 port->targ_lun_arg = ct; 2011 port->fe_datamove = cfiscsi_datamove; 2012 port->fe_done = cfiscsi_done; 2013 2014 /* XXX KDM what should we report here? */ 2015 /* XXX These should probably be fetched from CTL. */ 2016 port->max_targets = 1; 2017 port->max_target_id = 15; 2018 2019 port->options = opts; 2020 STAILQ_INIT(&opts); 2021 2022 /* Generate Port ID. */ 2023 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2024 idlen = roundup2(idlen, 4); 2025 len = sizeof(struct scsi_vpd_device_id) + idlen; 2026 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2027 M_CTL, M_WAITOK | M_ZERO); 2028 port->port_devid->len = len; 2029 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2030 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2031 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2032 SVPD_ID_TYPE_SCSI_NAME; 2033 desc->length = idlen; 2034 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2035 target, port->physical_port); 2036 2037 /* Generate Target ID. */ 2038 idlen = strlen(target) + 1; 2039 idlen = roundup2(idlen, 4); 2040 len = sizeof(struct scsi_vpd_device_id) + idlen; 2041 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2042 M_CTL, M_WAITOK | M_ZERO); 2043 port->target_devid->len = len; 2044 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2045 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2046 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2047 SVPD_ID_TYPE_SCSI_NAME; 2048 desc->length = idlen; 2049 strlcpy(desc->identifier, target, idlen); 2050 2051 retval = ctl_port_register(port); 2052 if (retval != 0) { 2053 ctl_free_opts(&port->options); 2054 cfiscsi_target_release(ct); 2055 free(port->port_devid, M_CFISCSI); 2056 free(port->target_devid, M_CFISCSI); 2057 req->status = CTL_LUN_ERROR; 2058 snprintf(req->error_str, sizeof(req->error_str), 2059 "ctl_frontend_register() failed with error %d", retval); 2060 return; 2061 } 2062done: 2063 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2064 req->status = CTL_LUN_OK; 2065 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2066 sizeof(port->targ_port)); //XXX 2067} 2068 2069static void 2070cfiscsi_ioctl_port_remove(struct ctl_req *req) 2071{ 2072 struct cfiscsi_target *ct; 2073 const char *target; 2074 ctl_options_t opts; 2075 2076 ctl_init_opts(&opts, req->num_args, req->kern_args); 2077 target = ctl_get_opt(&opts, "cfiscsi_target"); 2078 if (target == NULL) { 2079 ctl_free_opts(&opts); 2080 req->status = CTL_LUN_ERROR; 2081 snprintf(req->error_str, sizeof(req->error_str), 2082 "Missing required argument"); 2083 return; 2084 } 2085 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2086 if (ct == NULL) { 2087 ctl_free_opts(&opts); 2088 req->status = CTL_LUN_ERROR; 2089 snprintf(req->error_str, sizeof(req->error_str), 2090 "can't find target \"%s\"", target); 2091 return; 2092 } 2093 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2094 ctl_free_opts(&opts); 2095 req->status = CTL_LUN_ERROR; 2096 snprintf(req->error_str, sizeof(req->error_str), 2097 "target \"%s\" is already dying", target); 2098 return; 2099 } 2100 ctl_free_opts(&opts); 2101 2102 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2103 ctl_port_offline(&ct->ct_port); 2104 cfiscsi_target_release(ct); 2105 cfiscsi_target_release(ct); 2106} 2107 2108static int 2109cfiscsi_ioctl(struct cdev *dev, 2110 u_long cmd, caddr_t addr, int flag, struct thread *td) 2111{ 2112 struct ctl_iscsi *ci; 2113 struct ctl_req *req; 2114 2115 if (cmd == CTL_PORT_REQ) { 2116 req = (struct ctl_req *)addr; 2117 switch (req->reqtype) { 2118 case CTL_REQ_CREATE: 2119 cfiscsi_ioctl_port_create(req); 2120 break; 2121 case CTL_REQ_REMOVE: 2122 cfiscsi_ioctl_port_remove(req); 2123 break; 2124 default: 2125 req->status = CTL_LUN_ERROR; 2126 snprintf(req->error_str, sizeof(req->error_str), 2127 "Unsupported request type %d", req->reqtype); 2128 } 2129 return (0); 2130 } 2131 2132 if (cmd != CTL_ISCSI) 2133 return (ENOTTY); 2134 2135 ci = (struct ctl_iscsi *)addr; 2136 switch (ci->type) { 2137 case CTL_ISCSI_HANDOFF: 2138 cfiscsi_ioctl_handoff(ci); 2139 break; 2140 case CTL_ISCSI_LIST: 2141 cfiscsi_ioctl_list(ci); 2142 break; 2143 case CTL_ISCSI_TERMINATE: 2144 cfiscsi_ioctl_terminate(ci); 2145 break; 2146 case CTL_ISCSI_LOGOUT: 2147 cfiscsi_ioctl_logout(ci); 2148 break; 2149#ifdef ICL_KERNEL_PROXY 2150 case CTL_ISCSI_LISTEN: 2151 cfiscsi_ioctl_listen(ci); 2152 break; 2153 case CTL_ISCSI_ACCEPT: 2154 cfiscsi_ioctl_accept(ci); 2155 break; 2156 case CTL_ISCSI_SEND: 2157 cfiscsi_ioctl_send(ci); 2158 break; 2159 case CTL_ISCSI_RECEIVE: 2160 cfiscsi_ioctl_receive(ci); 2161 break; 2162#else 2163 case CTL_ISCSI_LISTEN: 2164 case CTL_ISCSI_ACCEPT: 2165 case CTL_ISCSI_SEND: 2166 case CTL_ISCSI_RECEIVE: 2167 ci->status = CTL_ISCSI_ERROR; 2168 snprintf(ci->error_str, sizeof(ci->error_str), 2169 "%s: CTL compiled without ICL_KERNEL_PROXY", 2170 __func__); 2171 break; 2172#endif /* !ICL_KERNEL_PROXY */ 2173 default: 2174 ci->status = CTL_ISCSI_ERROR; 2175 snprintf(ci->error_str, sizeof(ci->error_str), 2176 "%s: invalid iSCSI request type %d", __func__, ci->type); 2177 break; 2178 } 2179 2180 return (0); 2181} 2182 2183static void 2184cfiscsi_target_hold(struct cfiscsi_target *ct) 2185{ 2186 2187 refcount_acquire(&ct->ct_refcount); 2188} 2189 2190static void 2191cfiscsi_target_release(struct cfiscsi_target *ct) 2192{ 2193 struct cfiscsi_softc *softc; 2194 2195 softc = ct->ct_softc; 2196 mtx_lock(&softc->lock); 2197 if (refcount_release(&ct->ct_refcount)) { 2198 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2199 mtx_unlock(&softc->lock); 2200 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2201 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2202 if (ctl_port_deregister(&ct->ct_port) != 0) 2203 printf("%s: ctl_port_deregister() failed\n", 2204 __func__); 2205 } 2206 free(ct, M_CFISCSI); 2207 2208 return; 2209 } 2210 mtx_unlock(&softc->lock); 2211} 2212 2213static struct cfiscsi_target * 2214cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2215{ 2216 struct cfiscsi_target *ct; 2217 2218 mtx_lock(&softc->lock); 2219 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2220 if (strcmp(name, ct->ct_name) != 0 || 2221 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2222 continue; 2223 cfiscsi_target_hold(ct); 2224 mtx_unlock(&softc->lock); 2225 return (ct); 2226 } 2227 mtx_unlock(&softc->lock); 2228 2229 return (NULL); 2230} 2231 2232static struct cfiscsi_target * 2233cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2234 const char *alias) 2235{ 2236 struct cfiscsi_target *ct, *newct; 2237 int i; 2238 2239 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2240 return (NULL); 2241 2242 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2243 2244 mtx_lock(&softc->lock); 2245 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2246 if (strcmp(name, ct->ct_name) != 0 || 2247 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2248 continue; 2249 cfiscsi_target_hold(ct); 2250 mtx_unlock(&softc->lock); 2251 free(newct, M_CFISCSI); 2252 return (ct); 2253 } 2254 2255 for (i = 0; i < CTL_MAX_LUNS; i++) 2256 newct->ct_luns[i] = UINT32_MAX; 2257 2258 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2259 if (alias != NULL) 2260 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2261 refcount_init(&newct->ct_refcount, 1); 2262 newct->ct_softc = softc; 2263 if (TAILQ_EMPTY(&softc->targets)) 2264 softc->last_target_id = 0; 2265 newct->ct_target_id = ++softc->last_target_id; 2266 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2267 mtx_unlock(&softc->lock); 2268 2269 return (newct); 2270} 2271 2272/* 2273 * Takes LUN from the target space and returns LUN from the CTL space. 2274 */ 2275static uint32_t 2276cfiscsi_lun_map(void *arg, uint32_t lun) 2277{ 2278 struct cfiscsi_target *ct = arg; 2279 2280 if (lun >= CTL_MAX_LUNS) { 2281 CFISCSI_DEBUG("requested lun number %d is higher " 2282 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2283 return (UINT32_MAX); 2284 } 2285 return (ct->ct_luns[lun]); 2286} 2287 2288static int 2289cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2290 unsigned long lun_id, unsigned long ctl_lun_id) 2291{ 2292 2293 if (lun_id >= CTL_MAX_LUNS) { 2294 CFISCSI_WARN("requested lun number %ld is higher " 2295 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2296 return (-1); 2297 } 2298 2299 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2300 /* 2301 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2302 * when the LUN is created, and a second time just before 2303 * the port is brought online; don't emit warnings 2304 * for that case. 2305 */ 2306 if (ct->ct_luns[lun_id] == ctl_lun_id) 2307 return (0); 2308 CFISCSI_WARN("lun %ld already allocated", lun_id); 2309 return (-1); 2310 } 2311 2312#if 0 2313 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2314 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2315#endif 2316 2317 ct->ct_luns[lun_id] = ctl_lun_id; 2318 2319 return (0); 2320} 2321 2322static int 2323cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2324{ 2325 struct cfiscsi_softc *softc; 2326 struct cfiscsi_target *ct; 2327 const char *target = NULL; 2328 const char *lun = NULL; 2329 unsigned long tmp; 2330 2331 ct = (struct cfiscsi_target *)arg; 2332 softc = ct->ct_softc; 2333 2334 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2335 "cfiscsi_target"); 2336 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2337 "cfiscsi_lun"); 2338 2339 if (target == NULL && lun == NULL) 2340 return (0); 2341 2342 if (target == NULL || lun == NULL) { 2343 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2344 "cfiscsi_lun, or the other way around; ignoring"); 2345 return (0); 2346 } 2347 2348 if (strcmp(target, ct->ct_name) != 0) 2349 return (0); 2350 2351 tmp = strtoul(lun, NULL, 10); 2352 cfiscsi_target_set_lun(ct, tmp, lun_id); 2353 return (0); 2354} 2355 2356static int 2357cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2358{ 2359 struct cfiscsi_softc *softc; 2360 struct cfiscsi_target *ct; 2361 int i; 2362 2363 ct = (struct cfiscsi_target *)arg; 2364 softc = ct->ct_softc; 2365 2366 mtx_lock(&softc->lock); 2367 for (i = 0; i < CTL_MAX_LUNS; i++) { 2368 if (ct->ct_luns[i] != lun_id) 2369 continue; 2370 ct->ct_luns[i] = UINT32_MAX; 2371 break; 2372 } 2373 mtx_unlock(&softc->lock); 2374 return (0); 2375} 2376 2377static void 2378cfiscsi_datamove_in(union ctl_io *io) 2379{ 2380 struct cfiscsi_session *cs; 2381 struct icl_pdu *request, *response; 2382 const struct iscsi_bhs_scsi_command *bhssc; 2383 struct iscsi_bhs_data_in *bhsdi; 2384 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2385 size_t len, expected_len, sg_len, buffer_offset; 2386 const char *sg_addr; 2387 int ctl_sg_count, error, i; 2388 2389 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2390 cs = PDU_SESSION(request); 2391 2392 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2393 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2394 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2395 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2396 2397 if (io->scsiio.kern_sg_entries > 0) { 2398 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2399 ctl_sg_count = io->scsiio.kern_sg_entries; 2400 } else { 2401 ctl_sglist = &ctl_sg_entry; 2402 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2403 ctl_sglist->len = io->scsiio.kern_data_len; 2404 ctl_sg_count = 1; 2405 } 2406 2407 /* 2408 * This is the total amount of data to be transferred within the current 2409 * SCSI command. We need to record it so that we can properly report 2410 * underflow/underflow. 2411 */ 2412 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2413 2414 /* 2415 * This is the offset within the current SCSI command; for the first 2416 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2417 * it will be the sum of lengths of previous ones. 2418 */ 2419 buffer_offset = io->scsiio.kern_rel_offset; 2420 2421 /* 2422 * This is the transfer length expected by the initiator. In theory, 2423 * it could be different from the correct amount of data from the SCSI 2424 * point of view, even if that doesn't make any sense. 2425 */ 2426 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2427#if 0 2428 if (expected_len != io->scsiio.kern_total_len) { 2429 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2430 "actual length %zd", expected_len, 2431 (size_t)io->scsiio.kern_total_len); 2432 } 2433#endif 2434 2435 if (buffer_offset >= expected_len) { 2436#if 0 2437 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2438 "already sent the expected len", buffer_offset); 2439#endif 2440 io->scsiio.be_move_done(io); 2441 return; 2442 } 2443 2444 i = 0; 2445 sg_addr = NULL; 2446 sg_len = 0; 2447 response = NULL; 2448 bhsdi = NULL; 2449 for (;;) { 2450 if (response == NULL) { 2451 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2452 if (response == NULL) { 2453 CFISCSI_SESSION_WARN(cs, "failed to " 2454 "allocate memory; dropping connection"); 2455 ctl_set_busy(&io->scsiio); 2456 io->scsiio.be_move_done(io); 2457 cfiscsi_session_terminate(cs); 2458 return; 2459 } 2460 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2461 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2462 bhsdi->bhsdi_initiator_task_tag = 2463 bhssc->bhssc_initiator_task_tag; 2464 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2465 PDU_EXPDATASN(request)++; 2466 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2467 } 2468 2469 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2470 if (sg_len == 0) { 2471 sg_addr = ctl_sglist[i].addr; 2472 sg_len = ctl_sglist[i].len; 2473 KASSERT(sg_len > 0, ("sg_len <= 0")); 2474 } 2475 2476 len = sg_len; 2477 2478 /* 2479 * Truncate to maximum data segment length. 2480 */ 2481 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2482 ("ip_data_len %zd >= max_data_segment_length %zd", 2483 response->ip_data_len, cs->cs_max_data_segment_length)); 2484 if (response->ip_data_len + len > 2485 cs->cs_max_data_segment_length) { 2486 len = cs->cs_max_data_segment_length - 2487 response->ip_data_len; 2488 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2489 len, sg_len)); 2490 } 2491 2492 /* 2493 * Truncate to expected data transfer length. 2494 */ 2495 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2496 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2497 buffer_offset, response->ip_data_len, expected_len)); 2498 if (buffer_offset + response->ip_data_len + len > expected_len) { 2499 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2500 "to expected data transfer length %zd", 2501 buffer_offset + response->ip_data_len + len, expected_len); 2502 len = expected_len - (buffer_offset + response->ip_data_len); 2503 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2504 len, sg_len)); 2505 } 2506 2507 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2508 if (error != 0) { 2509 CFISCSI_SESSION_WARN(cs, "failed to " 2510 "allocate memory; dropping connection"); 2511 icl_pdu_free(response); 2512 ctl_set_busy(&io->scsiio); 2513 io->scsiio.be_move_done(io); 2514 cfiscsi_session_terminate(cs); 2515 return; 2516 } 2517 sg_addr += len; 2518 sg_len -= len; 2519 2520 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2521 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2522 buffer_offset, response->ip_data_len, expected_len)); 2523 if (buffer_offset + response->ip_data_len == expected_len) { 2524 /* 2525 * Already have the amount of data the initiator wanted. 2526 */ 2527 break; 2528 } 2529 2530 if (sg_len == 0) { 2531 /* 2532 * End of scatter-gather segment; 2533 * proceed to the next one... 2534 */ 2535 if (i == ctl_sg_count - 1) { 2536 /* 2537 * ... unless this was the last one. 2538 */ 2539 break; 2540 } 2541 i++; 2542 } 2543 2544 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2545 /* 2546 * Can't stuff more data into the current PDU; 2547 * queue it. Note that's not enough to check 2548 * for kern_data_resid == 0 instead; there 2549 * may be several Data-In PDUs for the final 2550 * call to cfiscsi_datamove(), and we want 2551 * to set the F flag only on the last of them. 2552 */ 2553 buffer_offset += response->ip_data_len; 2554 if (buffer_offset == io->scsiio.kern_total_len || 2555 buffer_offset == expected_len) 2556 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2557 cfiscsi_pdu_queue(response); 2558 response = NULL; 2559 bhsdi = NULL; 2560 } 2561 } 2562 if (response != NULL) { 2563 buffer_offset += response->ip_data_len; 2564 if (buffer_offset == io->scsiio.kern_total_len || 2565 buffer_offset == expected_len) 2566 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2567 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2568 cfiscsi_pdu_queue(response); 2569 } 2570 2571 io->scsiio.be_move_done(io); 2572} 2573 2574static void 2575cfiscsi_datamove_out(union ctl_io *io) 2576{ 2577 struct cfiscsi_session *cs; 2578 struct icl_pdu *request, *response; 2579 const struct iscsi_bhs_scsi_command *bhssc; 2580 struct iscsi_bhs_r2t *bhsr2t; 2581 struct cfiscsi_data_wait *cdw; 2582 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2583 uint32_t expected_len, r2t_off, r2t_len; 2584 uint32_t target_transfer_tag; 2585 bool done; 2586 2587 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2588 cs = PDU_SESSION(request); 2589 2590 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2591 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2592 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2593 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2594 2595 /* 2596 * We need to record it so that we can properly report 2597 * underflow/underflow. 2598 */ 2599 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2600 2601 /* 2602 * Report write underflow as error since CTL and backends don't 2603 * really support it, and SCSI does not tell how to do it right. 2604 */ 2605 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2606 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2607 expected_len) { 2608 io->scsiio.io_hdr.port_status = 43; 2609 io->scsiio.be_move_done(io); 2610 return; 2611 } 2612 2613 target_transfer_tag = 2614 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2615 2616#if 0 2617 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2618 "task tag 0x%x, target transfer tag 0x%x", 2619 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2620#endif 2621 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2622 if (cdw == NULL) { 2623 CFISCSI_SESSION_WARN(cs, "failed to " 2624 "allocate memory; dropping connection"); 2625 ctl_set_busy(&io->scsiio); 2626 io->scsiio.be_move_done(io); 2627 cfiscsi_session_terminate(cs); 2628 return; 2629 } 2630 cdw->cdw_ctl_io = io; 2631 cdw->cdw_target_transfer_tag = target_transfer_tag; 2632 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2633 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2634 2635 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2636 if (io->scsiio.kern_sg_entries > 0) { 2637 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2638 } else { 2639 ctl_sglist = &ctl_sg_entry; 2640 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2641 ctl_sglist->len = io->scsiio.kern_data_len; 2642 } 2643 cdw->cdw_sg_index = 0; 2644 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2645 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2646 r2t_off = io->scsiio.ext_data_filled; 2647 while (r2t_off > 0) { 2648 if (r2t_off >= cdw->cdw_sg_len) { 2649 r2t_off -= cdw->cdw_sg_len; 2650 cdw->cdw_sg_index++; 2651 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2652 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2653 continue; 2654 } 2655 cdw->cdw_sg_addr += r2t_off; 2656 cdw->cdw_sg_len -= r2t_off; 2657 r2t_off = 0; 2658 } 2659 2660 if (cs->cs_immediate_data && 2661 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2662 icl_pdu_data_segment_length(request)) { 2663 done = cfiscsi_handle_data_segment(request, cdw); 2664 if (done) { 2665 uma_zfree(cfiscsi_data_wait_zone, cdw); 2666 io->scsiio.be_move_done(io); 2667 return; 2668 } 2669 } 2670 2671 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2672 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2673 cs->cs_max_burst_length); 2674 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2675 2676 CFISCSI_SESSION_LOCK(cs); 2677 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2678 CFISCSI_SESSION_UNLOCK(cs); 2679 2680 /* 2681 * XXX: We should limit the number of outstanding R2T PDUs 2682 * per task to MaxOutstandingR2T. 2683 */ 2684 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2685 if (response == NULL) { 2686 CFISCSI_SESSION_WARN(cs, "failed to " 2687 "allocate memory; dropping connection"); 2688 ctl_set_busy(&io->scsiio); 2689 io->scsiio.be_move_done(io); 2690 cfiscsi_session_terminate(cs); 2691 return; 2692 } 2693 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2694 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2695 bhsr2t->bhsr2t_flags = 0x80; 2696 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2697 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2698 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2699 /* 2700 * XXX: Here we assume that cfiscsi_datamove() won't ever 2701 * be running concurrently on several CPUs for a given 2702 * command. 2703 */ 2704 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2705 PDU_R2TSN(request)++; 2706 /* 2707 * This is the offset within the current SCSI command; 2708 * i.e. for the first call of datamove(), it will be 0, 2709 * and for subsequent ones it will be the sum of lengths 2710 * of previous ones. 2711 * 2712 * The ext_data_filled is to account for unsolicited 2713 * (immediate) data that might have already arrived. 2714 */ 2715 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2716 /* 2717 * This is the total length (sum of S/G lengths) this call 2718 * to cfiscsi_datamove() is supposed to handle, limited by 2719 * MaxBurstLength. 2720 */ 2721 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2722 cfiscsi_pdu_queue(response); 2723} 2724 2725static void 2726cfiscsi_datamove(union ctl_io *io) 2727{ 2728 2729 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2730 cfiscsi_datamove_in(io); 2731 else { 2732 /* We hadn't received anything during this datamove yet. */ 2733 io->scsiio.ext_data_filled = 0; 2734 cfiscsi_datamove_out(io); 2735 } 2736} 2737 2738static void 2739cfiscsi_scsi_command_done(union ctl_io *io) 2740{ 2741 struct icl_pdu *request, *response; 2742 struct iscsi_bhs_scsi_command *bhssc; 2743 struct iscsi_bhs_scsi_response *bhssr; 2744#ifdef DIAGNOSTIC 2745 struct cfiscsi_data_wait *cdw; 2746#endif 2747 struct cfiscsi_session *cs; 2748 uint16_t sense_length; 2749 2750 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2751 cs = PDU_SESSION(request); 2752 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2753 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2754 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2755 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2756 2757 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2758 // bhssc->bhssc_initiator_task_tag); 2759 2760#ifdef DIAGNOSTIC 2761 CFISCSI_SESSION_LOCK(cs); 2762 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2763 KASSERT(bhssc->bhssc_initiator_task_tag != 2764 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2765 CFISCSI_SESSION_UNLOCK(cs); 2766#endif 2767 2768 /* 2769 * Do not return status for aborted commands. 2770 * There are exceptions, but none supported by CTL yet. 2771 */ 2772 if ((io->io_hdr.flags & CTL_FLAG_ABORT) && 2773 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) { 2774 ctl_free_io(io); 2775 icl_pdu_free(request); 2776 return; 2777 } 2778 2779 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2780 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2781 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2782 bhssr->bhssr_flags = 0x80; 2783 /* 2784 * XXX: We don't deal with bidirectional under/overflows; 2785 * does anything actually support those? 2786 */ 2787 if (PDU_TOTAL_TRANSFER_LEN(request) < 2788 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2789 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2790 bhssr->bhssr_residual_count = 2791 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2792 PDU_TOTAL_TRANSFER_LEN(request)); 2793 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2794 // ntohl(bhssr->bhssr_residual_count)); 2795 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2796 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2797 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2798 bhssr->bhssr_residual_count = 2799 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2800 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2801 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2802 // ntohl(bhssr->bhssr_residual_count)); 2803 } 2804 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2805 bhssr->bhssr_status = io->scsiio.scsi_status; 2806 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2807 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2808 2809 if (io->scsiio.sense_len > 0) { 2810#if 0 2811 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2812 io->scsiio.sense_len); 2813#endif 2814 sense_length = htons(io->scsiio.sense_len); 2815 icl_pdu_append_data(response, 2816 &sense_length, sizeof(sense_length), M_WAITOK); 2817 icl_pdu_append_data(response, 2818 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2819 } 2820 2821 ctl_free_io(io); 2822 icl_pdu_free(request); 2823 cfiscsi_pdu_queue(response); 2824} 2825 2826static void 2827cfiscsi_task_management_done(union ctl_io *io) 2828{ 2829 struct icl_pdu *request, *response; 2830 struct iscsi_bhs_task_management_request *bhstmr; 2831 struct iscsi_bhs_task_management_response *bhstmr2; 2832 struct cfiscsi_data_wait *cdw, *tmpcdw; 2833 struct cfiscsi_session *cs; 2834 2835 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2836 cs = PDU_SESSION(request); 2837 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2838 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2839 ISCSI_BHS_OPCODE_TASK_REQUEST, 2840 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2841 2842#if 0 2843 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2844 bhstmr->bhstmr_initiator_task_tag, 2845 bhstmr->bhstmr_referenced_task_tag); 2846#endif 2847 2848 if ((bhstmr->bhstmr_function & ~0x80) == 2849 BHSTMR_FUNCTION_ABORT_TASK) { 2850 /* 2851 * Make sure we no longer wait for Data-Out for this command. 2852 */ 2853 CFISCSI_SESSION_LOCK(cs); 2854 TAILQ_FOREACH_SAFE(cdw, 2855 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2856 if (bhstmr->bhstmr_referenced_task_tag != 2857 cdw->cdw_initiator_task_tag) 2858 continue; 2859 2860#if 0 2861 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2862 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2863#endif 2864 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2865 cdw, cdw_next); 2866 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2867 uma_zfree(cfiscsi_data_wait_zone, cdw); 2868 } 2869 CFISCSI_SESSION_UNLOCK(cs); 2870 } 2871 2872 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2873 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2874 response->ip_bhs; 2875 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2876 bhstmr2->bhstmr_flags = 0x80; 2877 if (io->io_hdr.status == CTL_SUCCESS) { 2878 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2879 } else { 2880 /* 2881 * XXX: How to figure out what exactly went wrong? iSCSI spec 2882 * expects us to provide detailed error, e.g. "Task does 2883 * not exist" or "LUN does not exist". 2884 */ 2885 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2886 bhstmr2->bhstmr_response = 2887 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2888 } 2889 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2890 2891 ctl_free_io(io); 2892 icl_pdu_free(request); 2893 cfiscsi_pdu_queue(response); 2894} 2895 2896static void 2897cfiscsi_done(union ctl_io *io) 2898{ 2899 struct icl_pdu *request; 2900 struct cfiscsi_session *cs; 2901 2902 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2903 ("invalid CTL status %#x", io->io_hdr.status)); 2904 2905 if (io->io_hdr.io_type == CTL_IO_TASK && 2906 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2907 /* 2908 * Implicit task termination has just completed; nothing to do. 2909 */ 2910 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2911 cs->cs_tasks_aborted = true; 2912 refcount_release(&cs->cs_outstanding_ctl_pdus); 2913 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2914 ctl_free_io(io); 2915 return; 2916 } 2917 2918 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2919 cs = PDU_SESSION(request); 2920 refcount_release(&cs->cs_outstanding_ctl_pdus); 2921 2922 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2923 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2924 cfiscsi_scsi_command_done(io); 2925 break; 2926 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2927 cfiscsi_task_management_done(io); 2928 break; 2929 default: 2930 panic("cfiscsi_done called with wrong opcode 0x%x", 2931 request->ip_bhs->bhs_opcode); 2932 } 2933} 2934