1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Edward Tomasz Napierala under sponsorship 8 * from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 34 /* 35 * CTL frontend for the iSCSI protocol. 36 */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include <sys/param.h> 42 #include <sys/capsicum.h> 43 #include <sys/condvar.h> 44 #include <sys/endian.h> 45 #include <sys/file.h> 46 #include <sys/kernel.h> 47 #include <sys/kthread.h> 48 #include <sys/lock.h> 49 #include <sys/malloc.h> 50 #include <sys/module.h> 51 #include <sys/mutex.h> 52 #include <sys/queue.h> 53 #include <sys/sbuf.h> 54 #include <sys/socket.h> 55 #include <sys/sysctl.h> 56 #include <sys/systm.h> 57 #include <sys/uio.h> 58 #include <sys/unistd.h> 59 #include <sys/nv.h> 60 #include <sys/dnv.h> 61 #include <vm/uma.h> 62 63 #include <cam/scsi/scsi_all.h> 64 #include <cam/scsi/scsi_da.h> 65 #include <cam/ctl/ctl_io.h> 66 #include <cam/ctl/ctl.h> 67 #include <cam/ctl/ctl_backend.h> 68 #include <cam/ctl/ctl_error.h> 69 #include <cam/ctl/ctl_frontend.h> 70 #include <cam/ctl/ctl_debug.h> 71 #include <cam/ctl/ctl_ha.h> 72 #include <cam/ctl/ctl_ioctl.h> 73 #include <cam/ctl/ctl_private.h> 74 75 #include <dev/iscsi/icl.h> 76 #include <dev/iscsi/icl_wrappers.h> 77 #include <dev/iscsi/iscsi_proto.h> 78 #include <cam/ctl/ctl_frontend_iscsi.h> 79 80 #ifdef ICL_KERNEL_PROXY 81 #include <sys/socketvar.h> 82 #endif 83 84 #ifdef ICL_KERNEL_PROXY 85 FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 86 #endif 87 88 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 89 static uma_zone_t cfiscsi_data_wait_zone; 90 91 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 92 "CAM Target Layer iSCSI Frontend"); 93 static int debug = 1; 94 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 95 &debug, 1, "Enable debug messages"); 96 static int ping_timeout = 5; 97 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 98 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 99 static int login_timeout = 60; 100 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 101 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 102 static int maxtags = 256; 103 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxtags, CTLFLAG_RWTUN, 104 &maxtags, 0, "Max number of requests queued by initiator"); 105 106 #define CFISCSI_DEBUG(X, ...) \ 107 do { \ 108 if (debug > 1) { \ 109 printf("%s: " X "\n", \ 110 __func__, ## __VA_ARGS__); \ 111 } \ 112 } while (0) 113 114 #define CFISCSI_WARN(X, ...) \ 115 do { \ 116 if (debug > 0) { \ 117 printf("WARNING: %s: " X "\n", \ 118 __func__, ## __VA_ARGS__); \ 119 } \ 120 } while (0) 121 122 #define CFISCSI_SESSION_DEBUG(S, X, ...) \ 123 do { \ 124 if (debug > 1) { \ 125 printf("%s: %s (%s): " X "\n", \ 126 __func__, S->cs_initiator_addr, \ 127 S->cs_initiator_name, ## __VA_ARGS__); \ 128 } \ 129 } while (0) 130 131 #define CFISCSI_SESSION_WARN(S, X, ...) \ 132 do { \ 133 if (debug > 0) { \ 134 printf("WARNING: %s (%s): " X "\n", \ 135 S->cs_initiator_addr, \ 136 S->cs_initiator_name, ## __VA_ARGS__); \ 137 } \ 138 } while (0) 139 140 #define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 141 #define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 142 #define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 143 144 #define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 145 #define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 146 147 struct cfiscsi_priv { 148 void *request; 149 uint32_t expdatasn; 150 uint32_t r2tsn; 151 }; 152 #define PRIV(io) \ 153 ((struct cfiscsi_priv *)&(io)->io_hdr.ctl_private[CTL_PRIV_FRONTEND]) 154 #define PRIV_REQUEST(io) PRIV(io)->request 155 #define PRIV_EXPDATASN(io) PRIV(io)->expdatasn 156 #define PRIV_R2TSN(io) PRIV(io)->r2tsn 157 158 static int cfiscsi_init(void); 159 static int cfiscsi_shutdown(void); 160 static void cfiscsi_online(void *arg); 161 static void cfiscsi_offline(void *arg); 162 static int cfiscsi_info(void *arg, struct sbuf *sb); 163 static int cfiscsi_ioctl(struct cdev *dev, 164 u_long cmd, caddr_t addr, int flag, struct thread *td); 165 static void cfiscsi_datamove(union ctl_io *io); 166 static void cfiscsi_datamove_in(union ctl_io *io); 167 static void cfiscsi_datamove_out(union ctl_io *io); 168 static void cfiscsi_done(union ctl_io *io); 169 static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 170 static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 171 static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 172 static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 173 static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 174 static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 175 static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 176 static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 177 struct cfiscsi_session *cs, union ctl_io *io, 178 uint32_t initiator_task_tag, 179 uint32_t *target_transfer_tagp); 180 static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 181 struct cfiscsi_data_wait *cdw); 182 static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 183 *softc, const char *name, uint16_t tag); 184 static struct cfiscsi_target *cfiscsi_target_find_or_create( 185 struct cfiscsi_softc *softc, const char *name, const char *alias, 186 uint16_t tag); 187 static void cfiscsi_target_release(struct cfiscsi_target *ct); 188 static void cfiscsi_session_delete(struct cfiscsi_session *cs); 189 190 static struct cfiscsi_softc cfiscsi_softc; 191 192 static struct ctl_frontend cfiscsi_frontend = 193 { 194 .name = "iscsi", 195 .init = cfiscsi_init, 196 .ioctl = cfiscsi_ioctl, 197 .shutdown = cfiscsi_shutdown, 198 }; 199 CTL_FRONTEND_DECLARE(cfiscsi, cfiscsi_frontend); 200 MODULE_DEPEND(cfiscsi, icl, 1, 1, 1); 201 202 static struct icl_pdu * 203 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 204 { 205 206 return (icl_pdu_new(request->ip_conn, flags)); 207 } 208 209 static bool 210 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 211 { 212 const struct iscsi_bhs_scsi_command *bhssc; 213 struct cfiscsi_session *cs; 214 uint32_t cmdsn, curcmdsn; 215 216 cs = PDU_SESSION(request); 217 218 /* 219 * Every incoming PDU - not just NOP-Out - resets the ping timer. 220 * The purpose of the timeout is to reset the connection when it stalls; 221 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 222 * in some queue. 223 */ 224 cs->cs_timeout = 0; 225 226 /* 227 * Immediate commands carry cmdsn, but it is neither incremented nor 228 * verified. 229 */ 230 if (request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) 231 return (false); 232 233 /* 234 * Data-Out PDUs don't contain CmdSN. 235 */ 236 if (request->ip_bhs->bhs_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 237 return (false); 238 239 /* 240 * We're only using fields common for all the request 241 * (initiator -> target) PDUs. 242 */ 243 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 244 curcmdsn = cmdsn = ntohl(bhssc->bhssc_cmdsn); 245 246 /* 247 * Increment session cmdsn and exit if we received the expected value. 248 */ 249 do { 250 if (atomic_fcmpset_32(&cs->cs_cmdsn, &curcmdsn, cmdsn + 1)) 251 return (false); 252 } while (curcmdsn == cmdsn); 253 254 /* 255 * The target MUST silently ignore any non-immediate command outside 256 * of this range. 257 */ 258 if (ISCSI_SNLT(cmdsn, curcmdsn) || 259 ISCSI_SNGT(cmdsn, curcmdsn - 1 + maxtags)) { 260 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 261 "while expected %u", cmdsn, curcmdsn); 262 return (true); 263 } 264 265 /* 266 * We don't support multiple connections now, so any discontinuity in 267 * CmdSN means lost PDUs. Since we don't support PDU retransmission -- 268 * terminate the connection. 269 */ 270 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 271 "while expected %u; dropping connection", 272 cmdsn, curcmdsn); 273 cfiscsi_session_terminate(cs); 274 return (true); 275 } 276 277 static void 278 cfiscsi_pdu_handle(struct icl_pdu *request) 279 { 280 struct cfiscsi_session *cs; 281 bool ignore; 282 283 cs = PDU_SESSION(request); 284 285 ignore = cfiscsi_pdu_update_cmdsn(request); 286 if (ignore) { 287 icl_pdu_free(request); 288 return; 289 } 290 291 /* 292 * Handle the PDU; this includes e.g. receiving the remaining 293 * part of PDU and submitting the SCSI command to CTL 294 * or queueing a reply. The handling routine is responsible 295 * for freeing the PDU when it's no longer needed. 296 */ 297 switch (request->ip_bhs->bhs_opcode & 298 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 299 case ISCSI_BHS_OPCODE_NOP_OUT: 300 cfiscsi_pdu_handle_nop_out(request); 301 break; 302 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 303 cfiscsi_pdu_handle_scsi_command(request); 304 break; 305 case ISCSI_BHS_OPCODE_TASK_REQUEST: 306 cfiscsi_pdu_handle_task_request(request); 307 break; 308 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 309 cfiscsi_pdu_handle_data_out(request); 310 break; 311 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 312 cfiscsi_pdu_handle_logout_request(request); 313 break; 314 default: 315 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 316 "opcode 0x%x; dropping connection", 317 request->ip_bhs->bhs_opcode); 318 icl_pdu_free(request); 319 cfiscsi_session_terminate(cs); 320 } 321 322 } 323 324 static void 325 cfiscsi_receive_callback(struct icl_pdu *request) 326 { 327 #ifdef ICL_KERNEL_PROXY 328 struct cfiscsi_session *cs; 329 330 cs = PDU_SESSION(request); 331 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 332 if (cs->cs_login_pdu == NULL) 333 cs->cs_login_pdu = request; 334 else 335 icl_pdu_free(request); 336 cv_signal(&cs->cs_login_cv); 337 return; 338 } 339 #endif 340 341 cfiscsi_pdu_handle(request); 342 } 343 344 static void 345 cfiscsi_error_callback(struct icl_conn *ic) 346 { 347 struct cfiscsi_session *cs; 348 349 cs = CONN_SESSION(ic); 350 351 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 352 cfiscsi_session_terminate(cs); 353 } 354 355 static int 356 cfiscsi_pdu_prepare(struct icl_pdu *response) 357 { 358 struct cfiscsi_session *cs; 359 struct iscsi_bhs_scsi_response *bhssr; 360 bool advance_statsn = true; 361 uint32_t cmdsn; 362 363 cs = PDU_SESSION(response); 364 365 CFISCSI_SESSION_LOCK_ASSERT(cs); 366 367 /* 368 * We're only using fields common for all the response 369 * (target -> initiator) PDUs. 370 */ 371 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 372 373 /* 374 * 10.8.3: "The StatSN for this connection is not advanced 375 * after this PDU is sent." 376 */ 377 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 378 advance_statsn = false; 379 380 /* 381 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 382 * StatSN for the connection is not advanced after this PDU is sent." 383 */ 384 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 385 bhssr->bhssr_initiator_task_tag == 0xffffffff) 386 advance_statsn = false; 387 388 /* 389 * See the comment below - StatSN is not meaningful and must 390 * not be advanced. 391 */ 392 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 393 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 394 advance_statsn = false; 395 396 /* 397 * 10.7.3: "The fields StatSN, Status, and Residual Count 398 * only have meaningful content if the S bit is set to 1." 399 */ 400 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 401 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 402 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 403 cmdsn = cs->cs_cmdsn; 404 bhssr->bhssr_expcmdsn = htonl(cmdsn); 405 bhssr->bhssr_maxcmdsn = htonl(cmdsn - 1 + 406 imax(0, maxtags - cs->cs_outstanding_ctl_pdus)); 407 408 if (advance_statsn) 409 cs->cs_statsn++; 410 411 return (0); 412 } 413 414 static void 415 cfiscsi_pdu_queue(struct icl_pdu *response) 416 { 417 struct cfiscsi_session *cs; 418 419 cs = PDU_SESSION(response); 420 421 CFISCSI_SESSION_LOCK(cs); 422 cfiscsi_pdu_prepare(response); 423 icl_pdu_queue(response); 424 CFISCSI_SESSION_UNLOCK(cs); 425 } 426 427 static void 428 cfiscsi_pdu_queue_cb(struct icl_pdu *response, icl_pdu_cb cb) 429 { 430 struct cfiscsi_session *cs = PDU_SESSION(response); 431 432 CFISCSI_SESSION_LOCK(cs); 433 cfiscsi_pdu_prepare(response); 434 icl_pdu_queue_cb(response, cb); 435 CFISCSI_SESSION_UNLOCK(cs); 436 } 437 438 static void 439 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 440 { 441 struct cfiscsi_session *cs; 442 struct iscsi_bhs_nop_out *bhsno; 443 struct iscsi_bhs_nop_in *bhsni; 444 struct icl_pdu *response; 445 void *data = NULL; 446 size_t datasize; 447 int error; 448 449 cs = PDU_SESSION(request); 450 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 451 452 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 453 /* 454 * Nothing to do, iscsi_pdu_update_statsn() already 455 * zeroed the timeout. 456 */ 457 icl_pdu_free(request); 458 return; 459 } 460 461 datasize = icl_pdu_data_segment_length(request); 462 if (datasize > 0) { 463 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 464 if (data == NULL) { 465 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 466 "dropping connection"); 467 icl_pdu_free(request); 468 cfiscsi_session_terminate(cs); 469 return; 470 } 471 icl_pdu_get_data(request, 0, data, datasize); 472 } 473 474 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 475 if (response == NULL) { 476 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 477 "droppping connection"); 478 free(data, M_CFISCSI); 479 icl_pdu_free(request); 480 cfiscsi_session_terminate(cs); 481 return; 482 } 483 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 484 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 485 bhsni->bhsni_flags = 0x80; 486 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 487 bhsni->bhsni_target_transfer_tag = 0xffffffff; 488 if (datasize > 0) { 489 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 490 if (error != 0) { 491 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 492 "dropping connection"); 493 free(data, M_CFISCSI); 494 icl_pdu_free(request); 495 icl_pdu_free(response); 496 cfiscsi_session_terminate(cs); 497 return; 498 } 499 free(data, M_CFISCSI); 500 } 501 502 icl_pdu_free(request); 503 cfiscsi_pdu_queue(response); 504 } 505 506 static void 507 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 508 { 509 struct iscsi_bhs_scsi_command *bhssc; 510 struct cfiscsi_session *cs; 511 union ctl_io *io; 512 int error; 513 514 cs = PDU_SESSION(request); 515 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 516 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 517 // bhssc->bhssc_initiator_task_tag); 518 519 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 520 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 521 "ImmediateData=No; dropping connection"); 522 icl_pdu_free(request); 523 cfiscsi_session_terminate(cs); 524 return; 525 } 526 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 527 ctl_zero_io(io); 528 PRIV_REQUEST(io) = request; 529 io->io_hdr.io_type = CTL_IO_SCSI; 530 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 531 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 532 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 533 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 534 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 535 case BHSSC_FLAGS_ATTR_UNTAGGED: 536 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 537 break; 538 case BHSSC_FLAGS_ATTR_SIMPLE: 539 io->scsiio.tag_type = CTL_TAG_SIMPLE; 540 break; 541 case BHSSC_FLAGS_ATTR_ORDERED: 542 io->scsiio.tag_type = CTL_TAG_ORDERED; 543 break; 544 case BHSSC_FLAGS_ATTR_HOQ: 545 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 546 break; 547 case BHSSC_FLAGS_ATTR_ACA: 548 io->scsiio.tag_type = CTL_TAG_ACA; 549 break; 550 default: 551 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 552 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 553 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 554 break; 555 } 556 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 557 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 558 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 559 error = ctl_queue(io); 560 if (error != CTL_RETVAL_COMPLETE) { 561 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 562 "dropping connection", error); 563 ctl_free_io(io); 564 refcount_release(&cs->cs_outstanding_ctl_pdus); 565 icl_pdu_free(request); 566 cfiscsi_session_terminate(cs); 567 } 568 } 569 570 static void 571 cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 572 { 573 struct iscsi_bhs_task_management_request *bhstmr; 574 struct iscsi_bhs_task_management_response *bhstmr2; 575 struct icl_pdu *response; 576 struct cfiscsi_session *cs; 577 union ctl_io *io; 578 int error; 579 580 cs = PDU_SESSION(request); 581 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 582 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 583 ctl_zero_io(io); 584 PRIV_REQUEST(io) = request; 585 io->io_hdr.io_type = CTL_IO_TASK; 586 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 587 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 588 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 589 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 590 591 switch (bhstmr->bhstmr_function & ~0x80) { 592 case BHSTMR_FUNCTION_ABORT_TASK: 593 #if 0 594 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 595 #endif 596 io->taskio.task_action = CTL_TASK_ABORT_TASK; 597 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 598 break; 599 case BHSTMR_FUNCTION_ABORT_TASK_SET: 600 #if 0 601 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 602 #endif 603 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 604 break; 605 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 606 #if 0 607 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 608 #endif 609 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 610 break; 611 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 612 #if 0 613 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 614 #endif 615 io->taskio.task_action = CTL_TASK_LUN_RESET; 616 break; 617 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 618 #if 0 619 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 620 #endif 621 io->taskio.task_action = CTL_TASK_TARGET_RESET; 622 break; 623 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 624 #if 0 625 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 626 #endif 627 io->taskio.task_action = CTL_TASK_TARGET_RESET; 628 break; 629 case BHSTMR_FUNCTION_QUERY_TASK: 630 #if 0 631 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 632 #endif 633 io->taskio.task_action = CTL_TASK_QUERY_TASK; 634 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 635 break; 636 case BHSTMR_FUNCTION_QUERY_TASK_SET: 637 #if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 639 #endif 640 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 641 break; 642 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 643 #if 0 644 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 645 #endif 646 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 647 break; 648 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 649 #if 0 650 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 651 #endif 652 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 653 break; 654 default: 655 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 656 bhstmr->bhstmr_function & ~0x80); 657 ctl_free_io(io); 658 659 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 660 if (response == NULL) { 661 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 662 "dropping connection"); 663 icl_pdu_free(request); 664 cfiscsi_session_terminate(cs); 665 return; 666 } 667 bhstmr2 = (struct iscsi_bhs_task_management_response *) 668 response->ip_bhs; 669 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 670 bhstmr2->bhstmr_flags = 0x80; 671 bhstmr2->bhstmr_response = 672 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 673 bhstmr2->bhstmr_initiator_task_tag = 674 bhstmr->bhstmr_initiator_task_tag; 675 icl_pdu_free(request); 676 cfiscsi_pdu_queue(response); 677 return; 678 } 679 680 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 681 error = ctl_queue(io); 682 if (error != CTL_RETVAL_COMPLETE) { 683 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 684 "dropping connection", error); 685 ctl_free_io(io); 686 refcount_release(&cs->cs_outstanding_ctl_pdus); 687 icl_pdu_free(request); 688 cfiscsi_session_terminate(cs); 689 } 690 } 691 692 static bool 693 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 694 { 695 struct iscsi_bhs_data_out *bhsdo; 696 struct cfiscsi_session *cs; 697 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 698 size_t copy_len, len, off, buffer_offset; 699 int ctl_sg_count; 700 union ctl_io *io; 701 702 cs = PDU_SESSION(request); 703 704 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 705 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 706 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 707 ISCSI_BHS_OPCODE_SCSI_COMMAND, 708 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 709 710 /* 711 * We're only using fields common for Data-Out and SCSI Command PDUs. 712 */ 713 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 714 715 io = cdw->cdw_ctl_io; 716 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 717 ("CTL_FLAG_DATA_IN")); 718 719 #if 0 720 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 721 request->ip_data_len, io->scsiio.kern_total_len); 722 #endif 723 724 if (io->scsiio.kern_sg_entries > 0) { 725 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 726 ctl_sg_count = io->scsiio.kern_sg_entries; 727 } else { 728 ctl_sglist = &ctl_sg_entry; 729 ctl_sglist->addr = io->scsiio.kern_data_ptr; 730 ctl_sglist->len = io->scsiio.kern_data_len; 731 ctl_sg_count = 1; 732 } 733 734 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 735 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 736 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 737 else 738 buffer_offset = 0; 739 len = icl_pdu_data_segment_length(request); 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 > 746 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 747 buffer_offset + len <= 748 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 749 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 750 "expected %zd; dropping connection", buffer_offset, 751 (size_t)io->scsiio.kern_rel_offset + 752 (size_t)io->scsiio.ext_data_filled); 753 ctl_set_data_phase_error(&io->scsiio); 754 cfiscsi_session_terminate(cs); 755 return (true); 756 } 757 758 /* 759 * This is the offset within the PDU data segment, as opposed 760 * to buffer_offset, which is the offset within the task (SCSI 761 * command). 762 */ 763 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 764 buffer_offset; 765 766 /* 767 * Iterate over the scatter/gather segments, filling them with data 768 * from the PDU data segment. Note that this can get called multiple 769 * times for one SCSI command; the cdw structure holds state for the 770 * scatter/gather list. 771 */ 772 for (;;) { 773 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 774 ("cdw->cdw_sg_index >= ctl_sg_count")); 775 if (cdw->cdw_sg_len == 0) { 776 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 777 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 778 } 779 KASSERT(off <= len, ("len > off")); 780 copy_len = len - off; 781 if (copy_len > cdw->cdw_sg_len) 782 copy_len = cdw->cdw_sg_len; 783 784 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 785 cdw->cdw_sg_addr += copy_len; 786 cdw->cdw_sg_len -= copy_len; 787 off += copy_len; 788 io->scsiio.ext_data_filled += copy_len; 789 io->scsiio.kern_data_resid -= copy_len; 790 791 if (cdw->cdw_sg_len == 0) { 792 /* 793 * End of current segment. 794 */ 795 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 796 /* 797 * Last segment in scatter/gather list. 798 */ 799 break; 800 } 801 cdw->cdw_sg_index++; 802 } 803 804 if (off == len) { 805 /* 806 * End of PDU payload. 807 */ 808 break; 809 } 810 } 811 812 if (len > off) { 813 /* 814 * In case of unsolicited data, it's possible that the buffer 815 * provided by CTL is smaller than negotiated FirstBurstLength. 816 * Just ignore the superfluous data; will ask for them with R2T 817 * on next call to cfiscsi_datamove(). 818 * 819 * This obviously can only happen with SCSI Command PDU. 820 */ 821 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 822 ISCSI_BHS_OPCODE_SCSI_COMMAND) 823 return (true); 824 825 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 826 "expected %zd; dropping connection", 827 icl_pdu_data_segment_length(request), off); 828 ctl_set_data_phase_error(&io->scsiio); 829 cfiscsi_session_terminate(cs); 830 return (true); 831 } 832 833 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 834 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 835 CFISCSI_SESSION_WARN(cs, "got the final packet without " 836 "the F flag; flags = 0x%x; dropping connection", 837 bhsdo->bhsdo_flags); 838 ctl_set_data_phase_error(&io->scsiio); 839 cfiscsi_session_terminate(cs); 840 return (true); 841 } 842 843 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 844 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 845 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 846 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 847 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 848 "transmitted size was %zd bytes instead of %d; " 849 "dropping connection", 850 (size_t)io->scsiio.ext_data_filled, 851 cdw->cdw_r2t_end); 852 ctl_set_data_phase_error(&io->scsiio); 853 cfiscsi_session_terminate(cs); 854 return (true); 855 } else { 856 /* 857 * For SCSI Command PDU, this just means we need to 858 * solicit more data by sending R2T. 859 */ 860 return (false); 861 } 862 } 863 864 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 865 #if 0 866 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 867 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 868 #endif 869 870 return (true); 871 } 872 873 return (false); 874 } 875 876 static void 877 cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 878 { 879 struct iscsi_bhs_data_out *bhsdo; 880 struct cfiscsi_session *cs; 881 struct cfiscsi_data_wait *cdw = NULL; 882 union ctl_io *io; 883 bool done; 884 885 cs = PDU_SESSION(request); 886 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 887 888 CFISCSI_SESSION_LOCK(cs); 889 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 890 #if 0 891 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 892 "ttt 0x%x, itt 0x%x", 893 bhsdo->bhsdo_target_transfer_tag, 894 bhsdo->bhsdo_initiator_task_tag, 895 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 896 #endif 897 if (bhsdo->bhsdo_target_transfer_tag == 898 cdw->cdw_target_transfer_tag) 899 break; 900 } 901 CFISCSI_SESSION_UNLOCK(cs); 902 if (cdw == NULL) { 903 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 904 "0x%x, not found; dropping connection", 905 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 906 icl_pdu_free(request); 907 cfiscsi_session_terminate(cs); 908 return; 909 } 910 911 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 912 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 913 "DataSN %u, while expected %u; dropping connection", 914 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 915 icl_pdu_free(request); 916 cfiscsi_session_terminate(cs); 917 return; 918 } 919 cdw->cdw_datasn++; 920 921 io = cdw->cdw_ctl_io; 922 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 923 ("CTL_FLAG_DATA_IN")); 924 925 done = cfiscsi_handle_data_segment(request, cdw); 926 if (done) { 927 CFISCSI_SESSION_LOCK(cs); 928 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 929 CFISCSI_SESSION_UNLOCK(cs); 930 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 931 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 932 cfiscsi_data_wait_free(cs, cdw); 933 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 934 if (done) 935 io->scsiio.be_move_done(io); 936 else 937 cfiscsi_datamove_out(io); 938 } 939 940 icl_pdu_free(request); 941 } 942 943 static void 944 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 945 { 946 struct iscsi_bhs_logout_request *bhslr; 947 struct iscsi_bhs_logout_response *bhslr2; 948 struct icl_pdu *response; 949 struct cfiscsi_session *cs; 950 951 cs = PDU_SESSION(request); 952 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 953 switch (bhslr->bhslr_reason & 0x7f) { 954 case BHSLR_REASON_CLOSE_SESSION: 955 case BHSLR_REASON_CLOSE_CONNECTION: 956 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 957 if (response == NULL) { 958 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 959 icl_pdu_free(request); 960 cfiscsi_session_terminate(cs); 961 return; 962 } 963 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 964 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 965 bhslr2->bhslr_flags = 0x80; 966 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 967 bhslr2->bhslr_initiator_task_tag = 968 bhslr->bhslr_initiator_task_tag; 969 icl_pdu_free(request); 970 cfiscsi_pdu_queue(response); 971 cfiscsi_session_terminate(cs); 972 break; 973 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 974 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 975 if (response == NULL) { 976 CFISCSI_SESSION_WARN(cs, 977 "failed to allocate memory; dropping connection"); 978 icl_pdu_free(request); 979 cfiscsi_session_terminate(cs); 980 return; 981 } 982 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 983 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 984 bhslr2->bhslr_flags = 0x80; 985 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 986 bhslr2->bhslr_initiator_task_tag = 987 bhslr->bhslr_initiator_task_tag; 988 icl_pdu_free(request); 989 cfiscsi_pdu_queue(response); 990 break; 991 default: 992 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 993 bhslr->bhslr_reason); 994 icl_pdu_free(request); 995 cfiscsi_session_terminate(cs); 996 break; 997 } 998 } 999 1000 static void 1001 cfiscsi_callout(void *context) 1002 { 1003 struct icl_pdu *cp; 1004 struct iscsi_bhs_nop_in *bhsni; 1005 struct cfiscsi_session *cs; 1006 1007 cs = context; 1008 1009 if (cs->cs_terminating) 1010 return; 1011 1012 callout_schedule(&cs->cs_callout, 1 * hz); 1013 1014 atomic_add_int(&cs->cs_timeout, 1); 1015 1016 #ifdef ICL_KERNEL_PROXY 1017 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1018 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1019 CFISCSI_SESSION_WARN(cs, "login timed out after " 1020 "%d seconds; dropping connection", cs->cs_timeout); 1021 cfiscsi_session_terminate(cs); 1022 } 1023 return; 1024 } 1025 #endif 1026 1027 if (ping_timeout <= 0) { 1028 /* 1029 * Pings are disabled. Don't send NOP-In in this case; 1030 * user might have disabled pings to work around problems 1031 * with certain initiators that can't properly handle 1032 * NOP-In, such as iPXE. Reset the timeout, to avoid 1033 * triggering reconnection, should the user decide to 1034 * reenable them. 1035 */ 1036 cs->cs_timeout = 0; 1037 return; 1038 } 1039 1040 if (cs->cs_timeout >= ping_timeout) { 1041 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1042 "dropping connection", ping_timeout); 1043 cfiscsi_session_terminate(cs); 1044 return; 1045 } 1046 1047 /* 1048 * If the ping was reset less than one second ago - which means 1049 * that we've received some PDU during the last second - assume 1050 * the traffic flows correctly and don't bother sending a NOP-Out. 1051 * 1052 * (It's 2 - one for one second, and one for incrementing is_timeout 1053 * earlier in this routine.) 1054 */ 1055 if (cs->cs_timeout < 2) 1056 return; 1057 1058 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1059 if (cp == NULL) { 1060 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1061 return; 1062 } 1063 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1064 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1065 bhsni->bhsni_flags = 0x80; 1066 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1067 1068 cfiscsi_pdu_queue(cp); 1069 } 1070 1071 static struct cfiscsi_data_wait * 1072 cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1073 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1074 { 1075 struct cfiscsi_data_wait *cdw; 1076 int error; 1077 1078 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1079 if (cdw == NULL) { 1080 CFISCSI_SESSION_WARN(cs, 1081 "failed to allocate %zd bytes", sizeof(*cdw)); 1082 return (NULL); 1083 } 1084 1085 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1086 &cdw->cdw_icl_prv); 1087 if (error != 0) { 1088 CFISCSI_SESSION_WARN(cs, 1089 "icl_conn_transfer_setup() failed with error %d", error); 1090 uma_zfree(cfiscsi_data_wait_zone, cdw); 1091 return (NULL); 1092 } 1093 1094 cdw->cdw_ctl_io = io; 1095 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1096 cdw->cdw_initiator_task_tag = initiator_task_tag; 1097 1098 return (cdw); 1099 } 1100 1101 static void 1102 cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1103 struct cfiscsi_data_wait *cdw) 1104 { 1105 1106 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1107 uma_zfree(cfiscsi_data_wait_zone, cdw); 1108 } 1109 1110 static void 1111 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1112 { 1113 struct cfiscsi_data_wait *cdw; 1114 union ctl_io *io; 1115 int error, last, wait; 1116 1117 if (cs->cs_target == NULL) 1118 return; /* No target yet, so nothing to do. */ 1119 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1120 ctl_zero_io(io); 1121 PRIV_REQUEST(io) = cs; 1122 io->io_hdr.io_type = CTL_IO_TASK; 1123 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1124 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1125 io->io_hdr.nexus.targ_lun = 0; 1126 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1127 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1128 wait = cs->cs_outstanding_ctl_pdus; 1129 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1130 error = ctl_queue(io); 1131 if (error != CTL_RETVAL_COMPLETE) { 1132 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1133 refcount_release(&cs->cs_outstanding_ctl_pdus); 1134 ctl_free_io(io); 1135 } 1136 1137 CFISCSI_SESSION_LOCK(cs); 1138 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1139 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1140 CFISCSI_SESSION_UNLOCK(cs); 1141 /* 1142 * Set nonzero port status; this prevents backends from 1143 * assuming that the data transfer actually succeeded 1144 * and writing uninitialized data to disk. 1145 */ 1146 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1147 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1148 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1149 cfiscsi_data_wait_free(cs, cdw); 1150 CFISCSI_SESSION_LOCK(cs); 1151 } 1152 CFISCSI_SESSION_UNLOCK(cs); 1153 1154 /* 1155 * Wait for CTL to terminate all the tasks. 1156 */ 1157 if (wait > 0) 1158 CFISCSI_SESSION_WARN(cs, 1159 "waiting for CTL to terminate %d tasks", wait); 1160 for (;;) { 1161 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1162 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1163 if (last != 0) 1164 break; 1165 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1166 0, "cfiscsi_terminate", hz / 100); 1167 } 1168 if (wait > 0) 1169 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1170 } 1171 1172 static void 1173 cfiscsi_maintenance_thread(void *arg) 1174 { 1175 struct cfiscsi_session *cs; 1176 1177 cs = arg; 1178 1179 for (;;) { 1180 CFISCSI_SESSION_LOCK(cs); 1181 if (cs->cs_terminating == false || cs->cs_handoff_in_progress) 1182 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1183 CFISCSI_SESSION_UNLOCK(cs); 1184 1185 if (cs->cs_terminating && cs->cs_handoff_in_progress == false) { 1186 1187 /* 1188 * We used to wait up to 30 seconds to deliver queued 1189 * PDUs to the initiator. We also tried hard to deliver 1190 * SCSI Responses for the aborted PDUs. We don't do 1191 * that anymore. We might need to revisit that. 1192 */ 1193 callout_drain(&cs->cs_callout); 1194 icl_conn_close(cs->cs_conn); 1195 1196 /* 1197 * At this point ICL receive thread is no longer 1198 * running; no new tasks can be queued. 1199 */ 1200 cfiscsi_session_terminate_tasks(cs); 1201 cfiscsi_session_delete(cs); 1202 kthread_exit(); 1203 return; 1204 } 1205 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1206 } 1207 } 1208 1209 static void 1210 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1211 { 1212 1213 cs->cs_terminating = true; 1214 cv_signal(&cs->cs_maintenance_cv); 1215 #ifdef ICL_KERNEL_PROXY 1216 cv_signal(&cs->cs_login_cv); 1217 #endif 1218 } 1219 1220 static int 1221 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1222 { 1223 struct cfiscsi_target *ct; 1224 char *name; 1225 int i; 1226 1227 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1228 1229 ct = cs->cs_target; 1230 name = strdup(cs->cs_initiator_id, M_CTL); 1231 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1232 if (i < 0) { 1233 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1234 i); 1235 cs->cs_ctl_initid = -1; 1236 return (1); 1237 } 1238 cs->cs_ctl_initid = i; 1239 #if 0 1240 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1241 #endif 1242 1243 return (0); 1244 } 1245 1246 static void 1247 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1248 { 1249 int error; 1250 1251 if (cs->cs_ctl_initid == -1) 1252 return; 1253 1254 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1255 if (error != 0) { 1256 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1257 error); 1258 } 1259 cs->cs_ctl_initid = -1; 1260 } 1261 1262 static struct cfiscsi_session * 1263 cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1264 { 1265 struct cfiscsi_session *cs; 1266 int error; 1267 1268 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1269 if (cs == NULL) { 1270 CFISCSI_WARN("malloc failed"); 1271 return (NULL); 1272 } 1273 cs->cs_ctl_initid = -1; 1274 1275 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1276 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1277 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1278 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1279 #ifdef ICL_KERNEL_PROXY 1280 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1281 #endif 1282 1283 /* 1284 * The purpose of this is to avoid racing with session shutdown. 1285 * Otherwise we could have the maintenance thread call icl_conn_close() 1286 * before we call icl_conn_handoff(). 1287 */ 1288 cs->cs_handoff_in_progress = true; 1289 1290 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); 1291 if (cs->cs_conn == NULL) { 1292 free(cs, M_CFISCSI); 1293 return (NULL); 1294 } 1295 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1296 cs->cs_conn->ic_error = cfiscsi_error_callback; 1297 cs->cs_conn->ic_prv0 = cs; 1298 1299 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1300 if (error != 0) { 1301 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1302 free(cs, M_CFISCSI); 1303 return (NULL); 1304 } 1305 1306 mtx_lock(&softc->lock); 1307 cs->cs_id = ++softc->last_session_id; 1308 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1309 mtx_unlock(&softc->lock); 1310 1311 /* 1312 * Start pinging the initiator. 1313 */ 1314 callout_init(&cs->cs_callout, 1); 1315 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1316 1317 return (cs); 1318 } 1319 1320 static void 1321 cfiscsi_session_delete(struct cfiscsi_session *cs) 1322 { 1323 struct cfiscsi_softc *softc; 1324 1325 softc = &cfiscsi_softc; 1326 1327 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1328 ("destroying session with outstanding CTL pdus")); 1329 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1330 ("destroying session with non-empty queue")); 1331 1332 mtx_lock(&softc->lock); 1333 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1334 mtx_unlock(&softc->lock); 1335 1336 cfiscsi_session_unregister_initiator(cs); 1337 if (cs->cs_target != NULL) 1338 cfiscsi_target_release(cs->cs_target); 1339 icl_conn_close(cs->cs_conn); 1340 icl_conn_free(cs->cs_conn); 1341 free(cs, M_CFISCSI); 1342 cv_signal(&softc->sessions_cv); 1343 } 1344 1345 static int 1346 cfiscsi_init(void) 1347 { 1348 struct cfiscsi_softc *softc; 1349 1350 softc = &cfiscsi_softc; 1351 bzero(softc, sizeof(*softc)); 1352 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1353 1354 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1355 #ifdef ICL_KERNEL_PROXY 1356 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1357 #endif 1358 TAILQ_INIT(&softc->sessions); 1359 TAILQ_INIT(&softc->targets); 1360 1361 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1362 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1363 UMA_ALIGN_PTR, 0); 1364 1365 return (0); 1366 } 1367 1368 static int 1369 cfiscsi_shutdown(void) 1370 { 1371 struct cfiscsi_softc *softc = &cfiscsi_softc; 1372 1373 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) 1374 return (EBUSY); 1375 1376 uma_zdestroy(cfiscsi_data_wait_zone); 1377 #ifdef ICL_KERNEL_PROXY 1378 cv_destroy(&softc->accept_cv); 1379 #endif 1380 cv_destroy(&softc->sessions_cv); 1381 mtx_destroy(&softc->lock); 1382 return (0); 1383 } 1384 1385 #ifdef ICL_KERNEL_PROXY 1386 static void 1387 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1388 { 1389 struct cfiscsi_session *cs; 1390 1391 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1392 if (cs == NULL) { 1393 CFISCSI_WARN("failed to create session"); 1394 return; 1395 } 1396 1397 icl_conn_handoff_sock(cs->cs_conn, so); 1398 cs->cs_initiator_sa = sa; 1399 cs->cs_portal_id = portal_id; 1400 cs->cs_handoff_in_progress = false; 1401 cs->cs_waiting_for_ctld = true; 1402 cv_signal(&cfiscsi_softc.accept_cv); 1403 1404 CFISCSI_SESSION_LOCK(cs); 1405 /* 1406 * Wake up the maintenance thread if we got scheduled for termination 1407 * somewhere between cfiscsi_session_new() and icl_conn_handoff_sock(). 1408 */ 1409 if (cs->cs_terminating) 1410 cfiscsi_session_terminate(cs); 1411 CFISCSI_SESSION_UNLOCK(cs); 1412 } 1413 #endif 1414 1415 static void 1416 cfiscsi_online(void *arg) 1417 { 1418 struct cfiscsi_softc *softc; 1419 struct cfiscsi_target *ct; 1420 int online; 1421 1422 ct = (struct cfiscsi_target *)arg; 1423 softc = ct->ct_softc; 1424 1425 mtx_lock(&softc->lock); 1426 if (ct->ct_online) { 1427 mtx_unlock(&softc->lock); 1428 return; 1429 } 1430 ct->ct_online = 1; 1431 online = softc->online++; 1432 mtx_unlock(&softc->lock); 1433 if (online > 0) 1434 return; 1435 1436 #ifdef ICL_KERNEL_PROXY 1437 if (softc->listener != NULL) 1438 icl_listen_free(softc->listener); 1439 softc->listener = icl_listen_new(cfiscsi_accept); 1440 #endif 1441 } 1442 1443 static void 1444 cfiscsi_offline(void *arg) 1445 { 1446 struct cfiscsi_softc *softc; 1447 struct cfiscsi_target *ct; 1448 struct cfiscsi_session *cs; 1449 int error, online; 1450 1451 ct = (struct cfiscsi_target *)arg; 1452 softc = ct->ct_softc; 1453 1454 mtx_lock(&softc->lock); 1455 if (!ct->ct_online) { 1456 mtx_unlock(&softc->lock); 1457 return; 1458 } 1459 ct->ct_online = 0; 1460 online = --softc->online; 1461 1462 do { 1463 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1464 if (cs->cs_target == ct) 1465 cfiscsi_session_terminate(cs); 1466 } 1467 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1468 if (cs->cs_target == ct) 1469 break; 1470 } 1471 if (cs != NULL) { 1472 error = cv_wait_sig(&softc->sessions_cv, &softc->lock); 1473 if (error != 0) { 1474 CFISCSI_SESSION_DEBUG(cs, 1475 "cv_wait failed with error %d\n", error); 1476 break; 1477 } 1478 } 1479 } while (cs != NULL && ct->ct_online == 0); 1480 mtx_unlock(&softc->lock); 1481 if (online > 0) 1482 return; 1483 1484 #ifdef ICL_KERNEL_PROXY 1485 icl_listen_free(softc->listener); 1486 softc->listener = NULL; 1487 #endif 1488 } 1489 1490 static int 1491 cfiscsi_info(void *arg, struct sbuf *sb) 1492 { 1493 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1494 int retval; 1495 1496 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1497 ct->ct_state); 1498 return (retval); 1499 } 1500 1501 static void 1502 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1503 { 1504 struct cfiscsi_softc *softc; 1505 struct cfiscsi_session *cs, *cs2; 1506 struct cfiscsi_target *ct; 1507 struct ctl_iscsi_handoff_params *cihp; 1508 int error; 1509 1510 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1511 softc = &cfiscsi_softc; 1512 1513 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1514 cihp->initiator_name, cihp->initiator_addr, 1515 cihp->target_name); 1516 1517 ct = cfiscsi_target_find(softc, cihp->target_name, 1518 cihp->portal_group_tag); 1519 if (ct == NULL) { 1520 ci->status = CTL_ISCSI_ERROR; 1521 snprintf(ci->error_str, sizeof(ci->error_str), 1522 "%s: target not found", __func__); 1523 return; 1524 } 1525 1526 #ifdef ICL_KERNEL_PROXY 1527 if (cihp->socket > 0 && cihp->connection_id > 0) { 1528 snprintf(ci->error_str, sizeof(ci->error_str), 1529 "both socket and connection_id set"); 1530 ci->status = CTL_ISCSI_ERROR; 1531 cfiscsi_target_release(ct); 1532 return; 1533 } 1534 if (cihp->socket == 0) { 1535 mtx_lock(&cfiscsi_softc.lock); 1536 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1537 if (cs->cs_id == cihp->connection_id) 1538 break; 1539 } 1540 if (cs == NULL) { 1541 mtx_unlock(&cfiscsi_softc.lock); 1542 snprintf(ci->error_str, sizeof(ci->error_str), 1543 "connection not found"); 1544 ci->status = CTL_ISCSI_ERROR; 1545 cfiscsi_target_release(ct); 1546 return; 1547 } 1548 mtx_unlock(&cfiscsi_softc.lock); 1549 } else { 1550 #endif 1551 cs = cfiscsi_session_new(softc, cihp->offload); 1552 if (cs == NULL) { 1553 ci->status = CTL_ISCSI_ERROR; 1554 snprintf(ci->error_str, sizeof(ci->error_str), 1555 "%s: cfiscsi_session_new failed", __func__); 1556 cfiscsi_target_release(ct); 1557 return; 1558 } 1559 #ifdef ICL_KERNEL_PROXY 1560 } 1561 #endif 1562 1563 /* 1564 * First PDU of Full Feature phase has the same CmdSN as the last 1565 * PDU from the Login Phase received from the initiator. Thus, 1566 * the -1 below. 1567 */ 1568 cs->cs_cmdsn = cihp->cmdsn; 1569 cs->cs_statsn = cihp->statsn; 1570 cs->cs_max_recv_data_segment_length = cihp->max_recv_data_segment_length; 1571 cs->cs_max_send_data_segment_length = cihp->max_send_data_segment_length; 1572 cs->cs_max_burst_length = cihp->max_burst_length; 1573 cs->cs_first_burst_length = cihp->first_burst_length; 1574 cs->cs_immediate_data = !!cihp->immediate_data; 1575 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1576 cs->cs_conn->ic_header_crc32c = true; 1577 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1578 cs->cs_conn->ic_data_crc32c = true; 1579 1580 strlcpy(cs->cs_initiator_name, 1581 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1582 strlcpy(cs->cs_initiator_addr, 1583 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1584 strlcpy(cs->cs_initiator_alias, 1585 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1586 memcpy(cs->cs_initiator_isid, 1587 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1588 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1589 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1590 cihp->initiator_isid[0], cihp->initiator_isid[1], 1591 cihp->initiator_isid[2], cihp->initiator_isid[3], 1592 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1593 1594 mtx_lock(&softc->lock); 1595 if (ct->ct_online == 0) { 1596 mtx_unlock(&softc->lock); 1597 CFISCSI_SESSION_LOCK(cs); 1598 cs->cs_handoff_in_progress = false; 1599 cfiscsi_session_terminate(cs); 1600 CFISCSI_SESSION_UNLOCK(cs); 1601 cfiscsi_target_release(ct); 1602 ci->status = CTL_ISCSI_ERROR; 1603 snprintf(ci->error_str, sizeof(ci->error_str), 1604 "%s: port offline", __func__); 1605 return; 1606 } 1607 cs->cs_target = ct; 1608 mtx_unlock(&softc->lock); 1609 1610 restart: 1611 if (!cs->cs_terminating) { 1612 mtx_lock(&softc->lock); 1613 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1614 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1615 cs->cs_target == cs2->cs_target && 1616 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1617 if (strcmp(cs->cs_initiator_addr, 1618 cs2->cs_initiator_addr) != 0) { 1619 CFISCSI_SESSION_WARN(cs2, 1620 "session reinstatement from " 1621 "different address %s", 1622 cs->cs_initiator_addr); 1623 } else { 1624 CFISCSI_SESSION_DEBUG(cs2, 1625 "session reinstatement"); 1626 } 1627 cfiscsi_session_terminate(cs2); 1628 mtx_unlock(&softc->lock); 1629 pause("cfiscsi_reinstate", 1); 1630 goto restart; 1631 } 1632 } 1633 mtx_unlock(&softc->lock); 1634 } 1635 1636 /* 1637 * Register initiator with CTL. 1638 */ 1639 cfiscsi_session_register_initiator(cs); 1640 1641 #ifdef ICL_KERNEL_PROXY 1642 if (cihp->socket > 0) { 1643 #endif 1644 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1645 if (error != 0) { 1646 CFISCSI_SESSION_LOCK(cs); 1647 cs->cs_handoff_in_progress = false; 1648 cfiscsi_session_terminate(cs); 1649 CFISCSI_SESSION_UNLOCK(cs); 1650 ci->status = CTL_ISCSI_ERROR; 1651 snprintf(ci->error_str, sizeof(ci->error_str), 1652 "%s: icl_conn_handoff failed with error %d", 1653 __func__, error); 1654 return; 1655 } 1656 #ifdef ICL_KERNEL_PROXY 1657 } 1658 #endif 1659 1660 #ifdef ICL_KERNEL_PROXY 1661 cs->cs_login_phase = false; 1662 1663 /* 1664 * First PDU of the Full Feature phase has likely already arrived. 1665 * We have to pick it up and execute properly. 1666 */ 1667 if (cs->cs_login_pdu != NULL) { 1668 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1669 cfiscsi_pdu_handle(cs->cs_login_pdu); 1670 cs->cs_login_pdu = NULL; 1671 } 1672 #endif 1673 1674 CFISCSI_SESSION_LOCK(cs); 1675 cs->cs_handoff_in_progress = false; 1676 1677 /* 1678 * Wake up the maintenance thread if we got scheduled for termination. 1679 */ 1680 if (cs->cs_terminating) 1681 cfiscsi_session_terminate(cs); 1682 CFISCSI_SESSION_UNLOCK(cs); 1683 1684 ci->status = CTL_ISCSI_OK; 1685 } 1686 1687 static void 1688 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1689 { 1690 struct ctl_iscsi_list_params *cilp; 1691 struct cfiscsi_session *cs; 1692 struct cfiscsi_softc *softc; 1693 struct sbuf *sb; 1694 int error; 1695 1696 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1697 softc = &cfiscsi_softc; 1698 1699 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1700 if (sb == NULL) { 1701 ci->status = CTL_ISCSI_ERROR; 1702 snprintf(ci->error_str, sizeof(ci->error_str), 1703 "Unable to allocate %d bytes for iSCSI session list", 1704 cilp->alloc_len); 1705 return; 1706 } 1707 1708 sbuf_printf(sb, "<ctlislist>\n"); 1709 mtx_lock(&softc->lock); 1710 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1711 if (cs->cs_target == NULL) 1712 continue; 1713 error = sbuf_printf(sb, "<connection id=\"%d\">" 1714 "<initiator>%s</initiator>" 1715 "<initiator_addr>%s</initiator_addr>" 1716 "<initiator_alias>%s</initiator_alias>" 1717 "<target>%s</target>" 1718 "<target_alias>%s</target_alias>" 1719 "<target_portal_group_tag>%u</target_portal_group_tag>" 1720 "<header_digest>%s</header_digest>" 1721 "<data_digest>%s</data_digest>" 1722 "<max_recv_data_segment_length>%d</max_recv_data_segment_length>" 1723 "<max_send_data_segment_length>%d</max_send_data_segment_length>" 1724 "<max_burst_length>%d</max_burst_length>" 1725 "<first_burst_length>%d</first_burst_length>" 1726 "<immediate_data>%d</immediate_data>" 1727 "<iser>%d</iser>" 1728 "<offload>%s</offload>" 1729 "</connection>\n", 1730 cs->cs_id, 1731 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1732 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1733 cs->cs_target->ct_tag, 1734 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1735 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1736 cs->cs_max_recv_data_segment_length, 1737 cs->cs_max_send_data_segment_length, 1738 cs->cs_max_burst_length, 1739 cs->cs_first_burst_length, 1740 cs->cs_immediate_data, 1741 cs->cs_conn->ic_iser, 1742 cs->cs_conn->ic_offload); 1743 if (error != 0) 1744 break; 1745 } 1746 mtx_unlock(&softc->lock); 1747 error = sbuf_printf(sb, "</ctlislist>\n"); 1748 if (error != 0) { 1749 sbuf_delete(sb); 1750 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1751 snprintf(ci->error_str, sizeof(ci->error_str), 1752 "Out of space, %d bytes is too small", cilp->alloc_len); 1753 return; 1754 } 1755 sbuf_finish(sb); 1756 1757 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1758 if (error != 0) { 1759 sbuf_delete(sb); 1760 snprintf(ci->error_str, sizeof(ci->error_str), 1761 "copyout failed with error %d", error); 1762 ci->status = CTL_ISCSI_ERROR; 1763 return; 1764 } 1765 cilp->fill_len = sbuf_len(sb) + 1; 1766 ci->status = CTL_ISCSI_OK; 1767 sbuf_delete(sb); 1768 } 1769 1770 static void 1771 cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1772 { 1773 struct icl_pdu *response; 1774 struct iscsi_bhs_asynchronous_message *bhsam; 1775 struct ctl_iscsi_logout_params *cilp; 1776 struct cfiscsi_session *cs; 1777 struct cfiscsi_softc *softc; 1778 int found = 0; 1779 1780 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1781 softc = &cfiscsi_softc; 1782 1783 mtx_lock(&softc->lock); 1784 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1785 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1786 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1787 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1788 continue; 1789 1790 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1791 if (response == NULL) { 1792 ci->status = CTL_ISCSI_ERROR; 1793 snprintf(ci->error_str, sizeof(ci->error_str), 1794 "Unable to allocate memory"); 1795 mtx_unlock(&softc->lock); 1796 return; 1797 } 1798 bhsam = 1799 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1800 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1801 bhsam->bhsam_flags = 0x80; 1802 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1803 bhsam->bhsam_parameter3 = htons(10); 1804 cfiscsi_pdu_queue(response); 1805 found++; 1806 } 1807 mtx_unlock(&softc->lock); 1808 1809 if (found == 0) { 1810 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1811 snprintf(ci->error_str, sizeof(ci->error_str), 1812 "No matching connections found"); 1813 return; 1814 } 1815 1816 ci->status = CTL_ISCSI_OK; 1817 } 1818 1819 static void 1820 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1821 { 1822 struct icl_pdu *response; 1823 struct iscsi_bhs_asynchronous_message *bhsam; 1824 struct ctl_iscsi_terminate_params *citp; 1825 struct cfiscsi_session *cs; 1826 struct cfiscsi_softc *softc; 1827 int found = 0; 1828 1829 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1830 softc = &cfiscsi_softc; 1831 1832 mtx_lock(&softc->lock); 1833 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1834 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1835 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1836 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1837 continue; 1838 1839 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1840 if (response == NULL) { 1841 /* 1842 * Oh well. Just terminate the connection. 1843 */ 1844 } else { 1845 bhsam = (struct iscsi_bhs_asynchronous_message *) 1846 response->ip_bhs; 1847 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1848 bhsam->bhsam_flags = 0x80; 1849 bhsam->bhsam_0xffffffff = 0xffffffff; 1850 bhsam->bhsam_async_event = 1851 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1852 cfiscsi_pdu_queue(response); 1853 } 1854 cfiscsi_session_terminate(cs); 1855 found++; 1856 } 1857 mtx_unlock(&softc->lock); 1858 1859 if (found == 0) { 1860 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1861 snprintf(ci->error_str, sizeof(ci->error_str), 1862 "No matching connections found"); 1863 return; 1864 } 1865 1866 ci->status = CTL_ISCSI_OK; 1867 } 1868 1869 static void 1870 cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1871 { 1872 struct ctl_iscsi_limits_params *cilp; 1873 struct icl_drv_limits idl; 1874 int error; 1875 1876 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1877 1878 error = icl_limits(cilp->offload, false, &idl); 1879 if (error != 0) { 1880 ci->status = CTL_ISCSI_ERROR; 1881 snprintf(ci->error_str, sizeof(ci->error_str), 1882 "%s: icl_limits failed with error %d", 1883 __func__, error); 1884 return; 1885 } 1886 1887 cilp->max_recv_data_segment_length = 1888 idl.idl_max_recv_data_segment_length; 1889 cilp->max_send_data_segment_length = 1890 idl.idl_max_send_data_segment_length; 1891 cilp->max_burst_length = idl.idl_max_burst_length; 1892 cilp->first_burst_length = idl.idl_first_burst_length; 1893 1894 ci->status = CTL_ISCSI_OK; 1895 } 1896 1897 #ifdef ICL_KERNEL_PROXY 1898 static void 1899 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1900 { 1901 struct ctl_iscsi_listen_params *cilp; 1902 struct sockaddr *sa; 1903 int error; 1904 1905 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1906 1907 if (cfiscsi_softc.listener == NULL) { 1908 CFISCSI_DEBUG("no listener"); 1909 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1910 ci->status = CTL_ISCSI_ERROR; 1911 return; 1912 } 1913 1914 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1915 if (error != 0) { 1916 CFISCSI_DEBUG("getsockaddr, error %d", error); 1917 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1918 ci->status = CTL_ISCSI_ERROR; 1919 return; 1920 } 1921 1922 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1923 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1924 if (error != 0) { 1925 free(sa, M_SONAME); 1926 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1927 snprintf(ci->error_str, sizeof(ci->error_str), 1928 "icl_listen_add failed, error %d", error); 1929 ci->status = CTL_ISCSI_ERROR; 1930 return; 1931 } 1932 1933 ci->status = CTL_ISCSI_OK; 1934 } 1935 1936 static void 1937 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1938 { 1939 struct ctl_iscsi_accept_params *ciap; 1940 struct cfiscsi_session *cs; 1941 int error; 1942 1943 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1944 1945 mtx_lock(&cfiscsi_softc.lock); 1946 for (;;) { 1947 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1948 if (cs->cs_waiting_for_ctld) 1949 break; 1950 } 1951 if (cs != NULL) 1952 break; 1953 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1954 if (error != 0) { 1955 mtx_unlock(&cfiscsi_softc.lock); 1956 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1957 ci->status = CTL_ISCSI_ERROR; 1958 return; 1959 } 1960 } 1961 mtx_unlock(&cfiscsi_softc.lock); 1962 1963 cs->cs_waiting_for_ctld = false; 1964 cs->cs_login_phase = true; 1965 1966 ciap->connection_id = cs->cs_id; 1967 ciap->portal_id = cs->cs_portal_id; 1968 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1969 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1970 cs->cs_initiator_sa->sa_len); 1971 if (error != 0) { 1972 snprintf(ci->error_str, sizeof(ci->error_str), 1973 "copyout failed with error %d", error); 1974 ci->status = CTL_ISCSI_ERROR; 1975 return; 1976 } 1977 1978 ci->status = CTL_ISCSI_OK; 1979 } 1980 1981 static void 1982 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1983 { 1984 struct ctl_iscsi_send_params *cisp; 1985 struct cfiscsi_session *cs; 1986 struct icl_pdu *ip; 1987 size_t datalen; 1988 void *data; 1989 int error; 1990 1991 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1992 1993 mtx_lock(&cfiscsi_softc.lock); 1994 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1995 if (cs->cs_id == cisp->connection_id) 1996 break; 1997 } 1998 if (cs == NULL) { 1999 mtx_unlock(&cfiscsi_softc.lock); 2000 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 2001 ci->status = CTL_ISCSI_ERROR; 2002 return; 2003 } 2004 mtx_unlock(&cfiscsi_softc.lock); 2005 2006 #if 0 2007 if (cs->cs_login_phase == false) 2008 return (EBUSY); 2009 #endif 2010 2011 if (cs->cs_terminating) { 2012 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 2013 ci->status = CTL_ISCSI_ERROR; 2014 return; 2015 } 2016 2017 datalen = cisp->data_segment_len; 2018 /* 2019 * XXX 2020 */ 2021 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 2022 if (datalen > 65535) { 2023 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 2024 ci->status = CTL_ISCSI_ERROR; 2025 return; 2026 } 2027 if (datalen > 0) { 2028 data = malloc(datalen, M_CFISCSI, M_WAITOK); 2029 error = copyin(cisp->data_segment, data, datalen); 2030 if (error != 0) { 2031 free(data, M_CFISCSI); 2032 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 2033 ci->status = CTL_ISCSI_ERROR; 2034 return; 2035 } 2036 } 2037 2038 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 2039 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 2040 if (datalen > 0) { 2041 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 2042 free(data, M_CFISCSI); 2043 } 2044 CFISCSI_SESSION_LOCK(cs); 2045 icl_pdu_queue(ip); 2046 CFISCSI_SESSION_UNLOCK(cs); 2047 ci->status = CTL_ISCSI_OK; 2048 } 2049 2050 static void 2051 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 2052 { 2053 struct ctl_iscsi_receive_params *cirp; 2054 struct cfiscsi_session *cs; 2055 struct icl_pdu *ip; 2056 void *data; 2057 int error; 2058 2059 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2060 2061 mtx_lock(&cfiscsi_softc.lock); 2062 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2063 if (cs->cs_id == cirp->connection_id) 2064 break; 2065 } 2066 if (cs == NULL) { 2067 mtx_unlock(&cfiscsi_softc.lock); 2068 snprintf(ci->error_str, sizeof(ci->error_str), 2069 "connection not found"); 2070 ci->status = CTL_ISCSI_ERROR; 2071 return; 2072 } 2073 mtx_unlock(&cfiscsi_softc.lock); 2074 2075 #if 0 2076 if (is->is_login_phase == false) 2077 return (EBUSY); 2078 #endif 2079 2080 CFISCSI_SESSION_LOCK(cs); 2081 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2082 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2083 if (error != 0) { 2084 CFISCSI_SESSION_UNLOCK(cs); 2085 snprintf(ci->error_str, sizeof(ci->error_str), 2086 "interrupted by signal"); 2087 ci->status = CTL_ISCSI_ERROR; 2088 return; 2089 } 2090 } 2091 2092 if (cs->cs_terminating) { 2093 CFISCSI_SESSION_UNLOCK(cs); 2094 snprintf(ci->error_str, sizeof(ci->error_str), 2095 "connection terminating"); 2096 ci->status = CTL_ISCSI_ERROR; 2097 return; 2098 } 2099 ip = cs->cs_login_pdu; 2100 cs->cs_login_pdu = NULL; 2101 CFISCSI_SESSION_UNLOCK(cs); 2102 2103 if (ip->ip_data_len > cirp->data_segment_len) { 2104 icl_pdu_free(ip); 2105 snprintf(ci->error_str, sizeof(ci->error_str), 2106 "data segment too big"); 2107 ci->status = CTL_ISCSI_ERROR; 2108 return; 2109 } 2110 2111 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2112 if (ip->ip_data_len > 0) { 2113 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2114 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2115 copyout(data, cirp->data_segment, ip->ip_data_len); 2116 free(data, M_CFISCSI); 2117 } 2118 2119 icl_pdu_free(ip); 2120 ci->status = CTL_ISCSI_OK; 2121 } 2122 2123 #endif /* !ICL_KERNEL_PROXY */ 2124 2125 static void 2126 cfiscsi_ioctl_port_create(struct ctl_req *req) 2127 { 2128 struct cfiscsi_target *ct; 2129 struct ctl_port *port; 2130 const char *target, *alias, *val; 2131 struct scsi_vpd_id_descriptor *desc; 2132 int retval, len, idlen; 2133 uint16_t tag; 2134 2135 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2136 alias = dnvlist_get_string(req->args_nvl, "cfiscsi_target_alias", NULL); 2137 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2138 NULL); 2139 2140 2141 if (target == NULL || val == NULL) { 2142 req->status = CTL_LUN_ERROR; 2143 snprintf(req->error_str, sizeof(req->error_str), 2144 "Missing required argument"); 2145 return; 2146 } 2147 2148 tag = strtoul(val, NULL, 0); 2149 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2150 if (ct == NULL) { 2151 req->status = CTL_LUN_ERROR; 2152 snprintf(req->error_str, sizeof(req->error_str), 2153 "failed to create target \"%s\"", target); 2154 return; 2155 } 2156 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2157 req->status = CTL_LUN_ERROR; 2158 snprintf(req->error_str, sizeof(req->error_str), 2159 "target \"%s\" for portal group tag %u already exists", 2160 target, tag); 2161 cfiscsi_target_release(ct); 2162 return; 2163 } 2164 port = &ct->ct_port; 2165 // WAT 2166 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2167 goto done; 2168 2169 port->frontend = &cfiscsi_frontend; 2170 port->port_type = CTL_PORT_ISCSI; 2171 /* XXX KDM what should the real number be here? */ 2172 port->num_requested_ctl_io = 4096; 2173 port->port_name = "iscsi"; 2174 port->physical_port = (int)tag; 2175 port->virtual_port = ct->ct_target_id; 2176 port->port_online = cfiscsi_online; 2177 port->port_offline = cfiscsi_offline; 2178 port->port_info = cfiscsi_info; 2179 port->onoff_arg = ct; 2180 port->fe_datamove = cfiscsi_datamove; 2181 port->fe_done = cfiscsi_done; 2182 port->targ_port = -1; 2183 port->options = nvlist_clone(req->args_nvl); 2184 2185 /* Generate Port ID. */ 2186 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2187 idlen = roundup2(idlen, 4); 2188 len = sizeof(struct scsi_vpd_device_id) + idlen; 2189 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2190 M_CTL, M_WAITOK | M_ZERO); 2191 port->port_devid->len = len; 2192 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2193 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2194 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2195 SVPD_ID_TYPE_SCSI_NAME; 2196 desc->length = idlen; 2197 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2198 2199 /* Generate Target ID. */ 2200 idlen = strlen(target) + 1; 2201 idlen = roundup2(idlen, 4); 2202 len = sizeof(struct scsi_vpd_device_id) + idlen; 2203 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2204 M_CTL, M_WAITOK | M_ZERO); 2205 port->target_devid->len = len; 2206 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2207 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2208 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2209 SVPD_ID_TYPE_SCSI_NAME; 2210 desc->length = idlen; 2211 strlcpy(desc->identifier, target, idlen); 2212 2213 retval = ctl_port_register(port); 2214 if (retval != 0) { 2215 free(port->port_devid, M_CFISCSI); 2216 free(port->target_devid, M_CFISCSI); 2217 cfiscsi_target_release(ct); 2218 req->status = CTL_LUN_ERROR; 2219 snprintf(req->error_str, sizeof(req->error_str), 2220 "ctl_port_register() failed with error %d", retval); 2221 return; 2222 } 2223 done: 2224 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2225 req->status = CTL_LUN_OK; 2226 req->result_nvl = nvlist_create(0); 2227 nvlist_add_number(req->result_nvl, "port_id", port->targ_port); 2228 } 2229 2230 static void 2231 cfiscsi_ioctl_port_remove(struct ctl_req *req) 2232 { 2233 struct cfiscsi_target *ct; 2234 const char *target, *val; 2235 uint16_t tag; 2236 2237 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2238 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2239 NULL); 2240 2241 if (target == NULL || val == NULL) { 2242 req->status = CTL_LUN_ERROR; 2243 snprintf(req->error_str, sizeof(req->error_str), 2244 "Missing required argument"); 2245 return; 2246 } 2247 2248 tag = strtoul(val, NULL, 0); 2249 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2250 if (ct == NULL) { 2251 req->status = CTL_LUN_ERROR; 2252 snprintf(req->error_str, sizeof(req->error_str), 2253 "can't find target \"%s\"", target); 2254 return; 2255 } 2256 2257 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2258 ctl_port_offline(&ct->ct_port); 2259 cfiscsi_target_release(ct); 2260 cfiscsi_target_release(ct); 2261 req->status = CTL_LUN_OK; 2262 } 2263 2264 static int 2265 cfiscsi_ioctl(struct cdev *dev, 2266 u_long cmd, caddr_t addr, int flag, struct thread *td) 2267 { 2268 struct ctl_iscsi *ci; 2269 struct ctl_req *req; 2270 2271 if (cmd == CTL_PORT_REQ) { 2272 req = (struct ctl_req *)addr; 2273 switch (req->reqtype) { 2274 case CTL_REQ_CREATE: 2275 cfiscsi_ioctl_port_create(req); 2276 break; 2277 case CTL_REQ_REMOVE: 2278 cfiscsi_ioctl_port_remove(req); 2279 break; 2280 default: 2281 req->status = CTL_LUN_ERROR; 2282 snprintf(req->error_str, sizeof(req->error_str), 2283 "Unsupported request type %d", req->reqtype); 2284 } 2285 return (0); 2286 } 2287 2288 if (cmd != CTL_ISCSI) 2289 return (ENOTTY); 2290 2291 ci = (struct ctl_iscsi *)addr; 2292 switch (ci->type) { 2293 case CTL_ISCSI_HANDOFF: 2294 cfiscsi_ioctl_handoff(ci); 2295 break; 2296 case CTL_ISCSI_LIST: 2297 cfiscsi_ioctl_list(ci); 2298 break; 2299 case CTL_ISCSI_LOGOUT: 2300 cfiscsi_ioctl_logout(ci); 2301 break; 2302 case CTL_ISCSI_TERMINATE: 2303 cfiscsi_ioctl_terminate(ci); 2304 break; 2305 case CTL_ISCSI_LIMITS: 2306 cfiscsi_ioctl_limits(ci); 2307 break; 2308 #ifdef ICL_KERNEL_PROXY 2309 case CTL_ISCSI_LISTEN: 2310 cfiscsi_ioctl_listen(ci); 2311 break; 2312 case CTL_ISCSI_ACCEPT: 2313 cfiscsi_ioctl_accept(ci); 2314 break; 2315 case CTL_ISCSI_SEND: 2316 cfiscsi_ioctl_send(ci); 2317 break; 2318 case CTL_ISCSI_RECEIVE: 2319 cfiscsi_ioctl_receive(ci); 2320 break; 2321 #else 2322 case CTL_ISCSI_LISTEN: 2323 case CTL_ISCSI_ACCEPT: 2324 case CTL_ISCSI_SEND: 2325 case CTL_ISCSI_RECEIVE: 2326 ci->status = CTL_ISCSI_ERROR; 2327 snprintf(ci->error_str, sizeof(ci->error_str), 2328 "%s: CTL compiled without ICL_KERNEL_PROXY", 2329 __func__); 2330 break; 2331 #endif /* !ICL_KERNEL_PROXY */ 2332 default: 2333 ci->status = CTL_ISCSI_ERROR; 2334 snprintf(ci->error_str, sizeof(ci->error_str), 2335 "%s: invalid iSCSI request type %d", __func__, ci->type); 2336 break; 2337 } 2338 2339 return (0); 2340 } 2341 2342 static void 2343 cfiscsi_target_hold(struct cfiscsi_target *ct) 2344 { 2345 2346 refcount_acquire(&ct->ct_refcount); 2347 } 2348 2349 static void 2350 cfiscsi_target_release(struct cfiscsi_target *ct) 2351 { 2352 struct cfiscsi_softc *softc; 2353 2354 softc = ct->ct_softc; 2355 mtx_lock(&softc->lock); 2356 if (refcount_release(&ct->ct_refcount)) { 2357 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2358 mtx_unlock(&softc->lock); 2359 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2360 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2361 if (ctl_port_deregister(&ct->ct_port) != 0) 2362 printf("%s: ctl_port_deregister() failed\n", 2363 __func__); 2364 } 2365 free(ct, M_CFISCSI); 2366 2367 return; 2368 } 2369 mtx_unlock(&softc->lock); 2370 } 2371 2372 static struct cfiscsi_target * 2373 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2374 { 2375 struct cfiscsi_target *ct; 2376 2377 mtx_lock(&softc->lock); 2378 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2379 if (ct->ct_tag != tag || 2380 strcmp(name, ct->ct_name) != 0 || 2381 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2382 continue; 2383 cfiscsi_target_hold(ct); 2384 mtx_unlock(&softc->lock); 2385 return (ct); 2386 } 2387 mtx_unlock(&softc->lock); 2388 2389 return (NULL); 2390 } 2391 2392 static struct cfiscsi_target * 2393 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2394 const char *alias, uint16_t tag) 2395 { 2396 struct cfiscsi_target *ct, *newct; 2397 2398 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2399 return (NULL); 2400 2401 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2402 2403 mtx_lock(&softc->lock); 2404 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2405 if (ct->ct_tag != tag || 2406 strcmp(name, ct->ct_name) != 0 || 2407 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2408 continue; 2409 cfiscsi_target_hold(ct); 2410 mtx_unlock(&softc->lock); 2411 free(newct, M_CFISCSI); 2412 return (ct); 2413 } 2414 2415 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2416 if (alias != NULL) 2417 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2418 newct->ct_tag = tag; 2419 refcount_init(&newct->ct_refcount, 1); 2420 newct->ct_softc = softc; 2421 if (TAILQ_EMPTY(&softc->targets)) 2422 softc->last_target_id = 0; 2423 newct->ct_target_id = ++softc->last_target_id; 2424 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2425 mtx_unlock(&softc->lock); 2426 2427 return (newct); 2428 } 2429 2430 static void 2431 cfiscsi_pdu_done(struct icl_pdu *ip, int error) 2432 { 2433 2434 if (error != 0) 2435 ; // XXX: Do something on error? 2436 ((ctl_ref)ip->ip_prv0)(ip->ip_prv1, -1); 2437 } 2438 2439 static void 2440 cfiscsi_datamove_in(union ctl_io *io) 2441 { 2442 struct cfiscsi_session *cs; 2443 struct icl_pdu *request, *response; 2444 const struct iscsi_bhs_scsi_command *bhssc; 2445 struct iscsi_bhs_data_in *bhsdi; 2446 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2447 size_t len, expected_len, sg_len, buffer_offset; 2448 const char *sg_addr; 2449 icl_pdu_cb cb; 2450 int ctl_sg_count, error, i; 2451 2452 request = PRIV_REQUEST(io); 2453 cs = PDU_SESSION(request); 2454 2455 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2456 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2457 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2458 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2459 2460 if (io->scsiio.kern_sg_entries > 0) { 2461 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2462 ctl_sg_count = io->scsiio.kern_sg_entries; 2463 } else { 2464 ctl_sglist = &ctl_sg_entry; 2465 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2466 ctl_sglist->len = io->scsiio.kern_data_len; 2467 ctl_sg_count = 1; 2468 } 2469 2470 /* 2471 * This is the offset within the current SCSI command; for the first 2472 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2473 * it will be the sum of lengths of previous ones. 2474 */ 2475 buffer_offset = io->scsiio.kern_rel_offset; 2476 2477 /* 2478 * This is the transfer length expected by the initiator. It can be 2479 * different from the amount of data from the SCSI point of view. 2480 */ 2481 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2482 2483 /* 2484 * If the transfer is outside of expected length -- we are done. 2485 */ 2486 if (buffer_offset >= expected_len) { 2487 #if 0 2488 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2489 "already sent the expected len", buffer_offset); 2490 #endif 2491 io->scsiio.be_move_done(io); 2492 return; 2493 } 2494 2495 if (io->scsiio.kern_data_ref != NULL) 2496 cb = cfiscsi_pdu_done; 2497 else 2498 cb = NULL; 2499 2500 i = 0; 2501 sg_addr = NULL; 2502 sg_len = 0; 2503 response = NULL; 2504 bhsdi = NULL; 2505 for (;;) { 2506 if (response == NULL) { 2507 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2508 if (response == NULL) { 2509 CFISCSI_SESSION_WARN(cs, "failed to " 2510 "allocate memory; dropping connection"); 2511 ctl_set_busy(&io->scsiio); 2512 io->scsiio.be_move_done(io); 2513 cfiscsi_session_terminate(cs); 2514 return; 2515 } 2516 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2517 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2518 bhsdi->bhsdi_initiator_task_tag = 2519 bhssc->bhssc_initiator_task_tag; 2520 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2521 bhsdi->bhsdi_datasn = htonl(PRIV_EXPDATASN(io)++); 2522 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2523 } 2524 2525 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2526 if (sg_len == 0) { 2527 sg_addr = ctl_sglist[i].addr; 2528 sg_len = ctl_sglist[i].len; 2529 KASSERT(sg_len > 0, ("sg_len <= 0")); 2530 } 2531 2532 len = sg_len; 2533 2534 /* 2535 * Truncate to maximum data segment length. 2536 */ 2537 KASSERT(response->ip_data_len < cs->cs_max_send_data_segment_length, 2538 ("ip_data_len %zd >= max_send_data_segment_length %d", 2539 response->ip_data_len, cs->cs_max_send_data_segment_length)); 2540 if (response->ip_data_len + len > 2541 cs->cs_max_send_data_segment_length) { 2542 len = cs->cs_max_send_data_segment_length - 2543 response->ip_data_len; 2544 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2545 len, sg_len)); 2546 } 2547 2548 /* 2549 * Truncate to expected data transfer length. 2550 */ 2551 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2552 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2553 buffer_offset, response->ip_data_len, expected_len)); 2554 if (buffer_offset + response->ip_data_len + len > expected_len) { 2555 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2556 "to expected data transfer length %zd", 2557 buffer_offset + response->ip_data_len + len, expected_len); 2558 len = expected_len - (buffer_offset + response->ip_data_len); 2559 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2560 len, sg_len)); 2561 } 2562 2563 error = icl_pdu_append_data(response, sg_addr, len, 2564 M_NOWAIT | (cb ? ICL_NOCOPY : 0)); 2565 if (error != 0) { 2566 CFISCSI_SESSION_WARN(cs, "failed to " 2567 "allocate memory; dropping connection"); 2568 icl_pdu_free(response); 2569 ctl_set_busy(&io->scsiio); 2570 io->scsiio.be_move_done(io); 2571 cfiscsi_session_terminate(cs); 2572 return; 2573 } 2574 sg_addr += len; 2575 sg_len -= len; 2576 io->scsiio.kern_data_resid -= len; 2577 2578 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2579 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2580 buffer_offset, response->ip_data_len, expected_len)); 2581 if (buffer_offset + response->ip_data_len == expected_len) { 2582 /* 2583 * Already have the amount of data the initiator wanted. 2584 */ 2585 break; 2586 } 2587 2588 if (sg_len == 0) { 2589 /* 2590 * End of scatter-gather segment; 2591 * proceed to the next one... 2592 */ 2593 if (i == ctl_sg_count - 1) { 2594 /* 2595 * ... unless this was the last one. 2596 */ 2597 break; 2598 } 2599 i++; 2600 } 2601 2602 if (response->ip_data_len == cs->cs_max_send_data_segment_length) { 2603 /* 2604 * Can't stuff more data into the current PDU; 2605 * queue it. Note that's not enough to check 2606 * for kern_data_resid == 0 instead; there 2607 * may be several Data-In PDUs for the final 2608 * call to cfiscsi_datamove(), and we want 2609 * to set the F flag only on the last of them. 2610 */ 2611 buffer_offset += response->ip_data_len; 2612 if (buffer_offset == io->scsiio.kern_total_len || 2613 buffer_offset == expected_len) { 2614 buffer_offset -= response->ip_data_len; 2615 break; 2616 } 2617 if (cb != NULL) { 2618 response->ip_prv0 = io->scsiio.kern_data_ref; 2619 response->ip_prv1 = io->scsiio.kern_data_arg; 2620 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2621 } 2622 cfiscsi_pdu_queue_cb(response, cb); 2623 response = NULL; 2624 bhsdi = NULL; 2625 } 2626 } 2627 if (response != NULL) { 2628 buffer_offset += response->ip_data_len; 2629 if (buffer_offset == io->scsiio.kern_total_len || 2630 buffer_offset == expected_len) { 2631 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2632 if (io->io_hdr.status == CTL_SUCCESS) { 2633 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2634 if (io->scsiio.kern_total_len < 2635 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2636 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2637 bhsdi->bhsdi_residual_count = 2638 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2639 io->scsiio.kern_total_len); 2640 } else if (io->scsiio.kern_total_len > 2641 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2642 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2643 bhsdi->bhsdi_residual_count = 2644 htonl(io->scsiio.kern_total_len - 2645 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2646 } 2647 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2648 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2649 } 2650 } 2651 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2652 if (cb != NULL) { 2653 response->ip_prv0 = io->scsiio.kern_data_ref; 2654 response->ip_prv1 = io->scsiio.kern_data_arg; 2655 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2656 } 2657 cfiscsi_pdu_queue_cb(response, cb); 2658 } 2659 2660 io->scsiio.be_move_done(io); 2661 } 2662 2663 static void 2664 cfiscsi_datamove_out(union ctl_io *io) 2665 { 2666 struct cfiscsi_session *cs; 2667 struct icl_pdu *request, *response; 2668 const struct iscsi_bhs_scsi_command *bhssc; 2669 struct iscsi_bhs_r2t *bhsr2t; 2670 struct cfiscsi_data_wait *cdw; 2671 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2672 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2673 uint32_t target_transfer_tag; 2674 bool done; 2675 2676 request = PRIV_REQUEST(io); 2677 cs = PDU_SESSION(request); 2678 2679 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2680 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2681 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2682 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2683 2684 /* 2685 * Complete write underflow. Not a single byte to read. Return. 2686 */ 2687 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2688 if (io->scsiio.kern_rel_offset >= expected_len) { 2689 io->scsiio.be_move_done(io); 2690 return; 2691 } 2692 datamove_len = MIN(io->scsiio.kern_data_len, 2693 expected_len - io->scsiio.kern_rel_offset); 2694 2695 target_transfer_tag = 2696 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2697 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2698 &target_transfer_tag); 2699 if (cdw == NULL) { 2700 CFISCSI_SESSION_WARN(cs, "failed to " 2701 "allocate memory; dropping connection"); 2702 ctl_set_busy(&io->scsiio); 2703 io->scsiio.be_move_done(io); 2704 cfiscsi_session_terminate(cs); 2705 return; 2706 } 2707 #if 0 2708 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2709 "task tag 0x%x, target transfer tag 0x%x", 2710 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2711 #endif 2712 2713 cdw->cdw_ctl_io = io; 2714 cdw->cdw_target_transfer_tag = target_transfer_tag; 2715 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2716 cdw->cdw_r2t_end = datamove_len; 2717 cdw->cdw_datasn = 0; 2718 2719 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2720 if (io->scsiio.kern_sg_entries > 0) { 2721 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2722 } else { 2723 ctl_sglist = &ctl_sg_entry; 2724 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2725 ctl_sglist->len = datamove_len; 2726 } 2727 cdw->cdw_sg_index = 0; 2728 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2729 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2730 r2t_off = io->scsiio.ext_data_filled; 2731 while (r2t_off > 0) { 2732 if (r2t_off >= cdw->cdw_sg_len) { 2733 r2t_off -= cdw->cdw_sg_len; 2734 cdw->cdw_sg_index++; 2735 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2736 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2737 continue; 2738 } 2739 cdw->cdw_sg_addr += r2t_off; 2740 cdw->cdw_sg_len -= r2t_off; 2741 r2t_off = 0; 2742 } 2743 2744 if (cs->cs_immediate_data && 2745 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2746 icl_pdu_data_segment_length(request)) { 2747 done = cfiscsi_handle_data_segment(request, cdw); 2748 if (done) { 2749 cfiscsi_data_wait_free(cs, cdw); 2750 io->scsiio.be_move_done(io); 2751 return; 2752 } 2753 } 2754 2755 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2756 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2757 cs->cs_max_burst_length); 2758 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2759 2760 CFISCSI_SESSION_LOCK(cs); 2761 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2762 CFISCSI_SESSION_UNLOCK(cs); 2763 2764 /* 2765 * XXX: We should limit the number of outstanding R2T PDUs 2766 * per task to MaxOutstandingR2T. 2767 */ 2768 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2769 if (response == NULL) { 2770 CFISCSI_SESSION_WARN(cs, "failed to " 2771 "allocate memory; dropping connection"); 2772 ctl_set_busy(&io->scsiio); 2773 io->scsiio.be_move_done(io); 2774 cfiscsi_session_terminate(cs); 2775 return; 2776 } 2777 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2778 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2779 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2780 bhsr2t->bhsr2t_flags = 0x80; 2781 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2782 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2783 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2784 /* 2785 * XXX: Here we assume that cfiscsi_datamove() won't ever 2786 * be running concurrently on several CPUs for a given 2787 * command. 2788 */ 2789 bhsr2t->bhsr2t_r2tsn = htonl(PRIV_R2TSN(io)++); 2790 /* 2791 * This is the offset within the current SCSI command; 2792 * i.e. for the first call of datamove(), it will be 0, 2793 * and for subsequent ones it will be the sum of lengths 2794 * of previous ones. 2795 * 2796 * The ext_data_filled is to account for unsolicited 2797 * (immediate) data that might have already arrived. 2798 */ 2799 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2800 /* 2801 * This is the total length (sum of S/G lengths) this call 2802 * to cfiscsi_datamove() is supposed to handle, limited by 2803 * MaxBurstLength. 2804 */ 2805 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2806 cfiscsi_pdu_queue(response); 2807 } 2808 2809 static void 2810 cfiscsi_datamove(union ctl_io *io) 2811 { 2812 2813 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2814 cfiscsi_datamove_in(io); 2815 else { 2816 /* We hadn't received anything during this datamove yet. */ 2817 io->scsiio.ext_data_filled = 0; 2818 cfiscsi_datamove_out(io); 2819 } 2820 } 2821 2822 static void 2823 cfiscsi_scsi_command_done(union ctl_io *io) 2824 { 2825 struct icl_pdu *request, *response; 2826 struct iscsi_bhs_scsi_command *bhssc; 2827 struct iscsi_bhs_scsi_response *bhssr; 2828 #ifdef DIAGNOSTIC 2829 struct cfiscsi_data_wait *cdw; 2830 #endif 2831 struct cfiscsi_session *cs; 2832 uint16_t sense_length; 2833 2834 request = PRIV_REQUEST(io); 2835 cs = PDU_SESSION(request); 2836 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2837 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2838 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2839 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2840 2841 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2842 // bhssc->bhssc_initiator_task_tag); 2843 2844 #ifdef DIAGNOSTIC 2845 CFISCSI_SESSION_LOCK(cs); 2846 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2847 KASSERT(bhssc->bhssc_initiator_task_tag != 2848 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2849 CFISCSI_SESSION_UNLOCK(cs); 2850 #endif 2851 2852 /* 2853 * Do not return status for aborted commands. 2854 * There are exceptions, but none supported by CTL yet. 2855 */ 2856 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2857 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2858 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2859 ctl_free_io(io); 2860 icl_pdu_free(request); 2861 return; 2862 } 2863 2864 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2865 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2866 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2867 bhssr->bhssr_flags = 0x80; 2868 /* 2869 * XXX: We don't deal with bidirectional under/overflows; 2870 * does anything actually support those? 2871 */ 2872 if (io->scsiio.kern_total_len < 2873 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2874 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2875 bhssr->bhssr_residual_count = 2876 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2877 io->scsiio.kern_total_len); 2878 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2879 // ntohl(bhssr->bhssr_residual_count)); 2880 } else if (io->scsiio.kern_total_len > 2881 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2882 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2883 bhssr->bhssr_residual_count = htonl(io->scsiio.kern_total_len - 2884 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2885 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2886 // ntohl(bhssr->bhssr_residual_count)); 2887 } 2888 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2889 bhssr->bhssr_status = io->scsiio.scsi_status; 2890 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2891 bhssr->bhssr_expdatasn = htonl(PRIV_EXPDATASN(io)); 2892 2893 if (io->scsiio.sense_len > 0) { 2894 #if 0 2895 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2896 io->scsiio.sense_len); 2897 #endif 2898 sense_length = htons(io->scsiio.sense_len); 2899 icl_pdu_append_data(response, 2900 &sense_length, sizeof(sense_length), M_WAITOK); 2901 icl_pdu_append_data(response, 2902 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2903 } 2904 2905 ctl_free_io(io); 2906 icl_pdu_free(request); 2907 cfiscsi_pdu_queue(response); 2908 } 2909 2910 static void 2911 cfiscsi_task_management_done(union ctl_io *io) 2912 { 2913 struct icl_pdu *request, *response; 2914 struct iscsi_bhs_task_management_request *bhstmr; 2915 struct iscsi_bhs_task_management_response *bhstmr2; 2916 struct cfiscsi_data_wait *cdw, *tmpcdw; 2917 struct cfiscsi_session *cs, *tcs; 2918 struct cfiscsi_softc *softc; 2919 int cold_reset = 0; 2920 2921 request = PRIV_REQUEST(io); 2922 cs = PDU_SESSION(request); 2923 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2924 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2925 ISCSI_BHS_OPCODE_TASK_REQUEST, 2926 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2927 2928 #if 0 2929 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2930 bhstmr->bhstmr_initiator_task_tag, 2931 bhstmr->bhstmr_referenced_task_tag); 2932 #endif 2933 2934 if ((bhstmr->bhstmr_function & ~0x80) == 2935 BHSTMR_FUNCTION_ABORT_TASK) { 2936 /* 2937 * Make sure we no longer wait for Data-Out for this command. 2938 */ 2939 CFISCSI_SESSION_LOCK(cs); 2940 TAILQ_FOREACH_SAFE(cdw, 2941 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2942 if (bhstmr->bhstmr_referenced_task_tag != 2943 cdw->cdw_initiator_task_tag) 2944 continue; 2945 2946 #if 0 2947 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2948 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2949 #endif 2950 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2951 cdw, cdw_next); 2952 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2953 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2954 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2955 cfiscsi_data_wait_free(cs, cdw); 2956 } 2957 CFISCSI_SESSION_UNLOCK(cs); 2958 } 2959 if ((bhstmr->bhstmr_function & ~0x80) == 2960 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2961 io->io_hdr.status == CTL_SUCCESS) 2962 cold_reset = 1; 2963 2964 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2965 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2966 response->ip_bhs; 2967 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2968 bhstmr2->bhstmr_flags = 0x80; 2969 switch (io->taskio.task_status) { 2970 case CTL_TASK_FUNCTION_COMPLETE: 2971 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2972 break; 2973 case CTL_TASK_FUNCTION_SUCCEEDED: 2974 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2975 break; 2976 case CTL_TASK_LUN_DOES_NOT_EXIST: 2977 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2978 break; 2979 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2980 default: 2981 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2982 break; 2983 } 2984 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2985 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2986 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2987 2988 ctl_free_io(io); 2989 icl_pdu_free(request); 2990 cfiscsi_pdu_queue(response); 2991 2992 if (cold_reset) { 2993 softc = cs->cs_target->ct_softc; 2994 mtx_lock(&softc->lock); 2995 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2996 if (tcs->cs_target == cs->cs_target) 2997 cfiscsi_session_terminate(tcs); 2998 } 2999 mtx_unlock(&softc->lock); 3000 } 3001 } 3002 3003 static void 3004 cfiscsi_done(union ctl_io *io) 3005 { 3006 struct icl_pdu *request; 3007 struct cfiscsi_session *cs; 3008 3009 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 3010 ("invalid CTL status %#x", io->io_hdr.status)); 3011 3012 if (io->io_hdr.io_type == CTL_IO_TASK && 3013 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 3014 /* 3015 * Implicit task termination has just completed; nothing to do. 3016 */ 3017 cs = PRIV_REQUEST(io); 3018 cs->cs_tasks_aborted = true; 3019 refcount_release(&cs->cs_outstanding_ctl_pdus); 3020 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 3021 ctl_free_io(io); 3022 return; 3023 } 3024 3025 request = PRIV_REQUEST(io); 3026 cs = PDU_SESSION(request); 3027 3028 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 3029 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 3030 cfiscsi_scsi_command_done(io); 3031 break; 3032 case ISCSI_BHS_OPCODE_TASK_REQUEST: 3033 cfiscsi_task_management_done(io); 3034 break; 3035 default: 3036 panic("cfiscsi_done called with wrong opcode 0x%x", 3037 request->ip_bhs->bhs_opcode); 3038 } 3039 3040 refcount_release(&cs->cs_outstanding_ctl_pdus); 3041 } 3042