1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 The FreeBSD Foundation 5 * 6 * This software was developed by Edward Tomasz Napierala under sponsorship 7 * from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 /* 34 * CTL frontend for the iSCSI protocol. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/capsicum.h> 42 #include <sys/condvar.h> 43 #include <sys/endian.h> 44 #include <sys/file.h> 45 #include <sys/kernel.h> 46 #include <sys/kthread.h> 47 #include <sys/lock.h> 48 #include <sys/malloc.h> 49 #include <sys/module.h> 50 #include <sys/mutex.h> 51 #include <sys/queue.h> 52 #include <sys/sbuf.h> 53 #include <sys/socket.h> 54 #include <sys/sysctl.h> 55 #include <sys/systm.h> 56 #include <sys/uio.h> 57 #include <sys/unistd.h> 58 #include <sys/nv.h> 59 #include <sys/dnv.h> 60 #include <vm/uma.h> 61 62 #include <cam/scsi/scsi_all.h> 63 #include <cam/scsi/scsi_da.h> 64 #include <cam/ctl/ctl_io.h> 65 #include <cam/ctl/ctl.h> 66 #include <cam/ctl/ctl_backend.h> 67 #include <cam/ctl/ctl_error.h> 68 #include <cam/ctl/ctl_frontend.h> 69 #include <cam/ctl/ctl_debug.h> 70 #include <cam/ctl/ctl_ha.h> 71 #include <cam/ctl/ctl_ioctl.h> 72 #include <cam/ctl/ctl_private.h> 73 74 #include <dev/iscsi/icl.h> 75 #include <dev/iscsi/icl_wrappers.h> 76 #include <dev/iscsi/iscsi_proto.h> 77 #include <cam/ctl/ctl_frontend_iscsi.h> 78 79 #ifdef ICL_KERNEL_PROXY 80 #include <sys/socketvar.h> 81 #endif 82 83 #ifdef ICL_KERNEL_PROXY 84 FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 85 #endif 86 87 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 88 static uma_zone_t cfiscsi_data_wait_zone; 89 90 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 91 "CAM Target Layer iSCSI Frontend"); 92 static int debug = 1; 93 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 94 &debug, 1, "Enable debug messages"); 95 static int ping_timeout = 5; 96 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 97 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 98 static int login_timeout = 60; 99 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 100 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 101 static int maxtags = 256; 102 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxtags, CTLFLAG_RWTUN, 103 &maxtags, 0, "Max number of requests queued by initiator"); 104 105 #define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113 #define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121 #define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130 #define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139 #define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140 #define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141 #define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143 #define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144 #define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145 146 struct cfiscsi_priv { 147 void *request; 148 uint32_t expdatasn; 149 uint32_t r2tsn; 150 }; 151 #define PRIV(io) \ 152 ((struct cfiscsi_priv *)&(io)->io_hdr.ctl_private[CTL_PRIV_FRONTEND]) 153 #define PRIV_REQUEST(io) PRIV(io)->request 154 #define PRIV_EXPDATASN(io) PRIV(io)->expdatasn 155 #define PRIV_R2TSN(io) PRIV(io)->r2tsn 156 157 static int cfiscsi_init(void); 158 static int cfiscsi_shutdown(void); 159 static void cfiscsi_online(void *arg); 160 static void cfiscsi_offline(void *arg); 161 static int cfiscsi_info(void *arg, struct sbuf *sb); 162 static int cfiscsi_ioctl(struct cdev *dev, 163 u_long cmd, caddr_t addr, int flag, struct thread *td); 164 static void cfiscsi_datamove(union ctl_io *io); 165 static void cfiscsi_datamove_in(union ctl_io *io); 166 static void cfiscsi_datamove_out(union ctl_io *io); 167 static void cfiscsi_done(union ctl_io *io); 168 static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 169 static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 170 static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 171 static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 172 static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 173 static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 174 static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 175 static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 176 struct cfiscsi_session *cs, union ctl_io *io, 177 uint32_t initiator_task_tag, 178 uint32_t *target_transfer_tagp); 179 static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 180 struct cfiscsi_data_wait *cdw); 181 static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 182 *softc, const char *name, uint16_t tag); 183 static struct cfiscsi_target *cfiscsi_target_find_or_create( 184 struct cfiscsi_softc *softc, const char *name, const char *alias, 185 uint16_t tag); 186 static void cfiscsi_target_release(struct cfiscsi_target *ct); 187 static void cfiscsi_session_delete(struct cfiscsi_session *cs); 188 189 static struct cfiscsi_softc cfiscsi_softc; 190 191 static struct ctl_frontend cfiscsi_frontend = 192 { 193 .name = "iscsi", 194 .init = cfiscsi_init, 195 .ioctl = cfiscsi_ioctl, 196 .shutdown = cfiscsi_shutdown, 197 }; 198 CTL_FRONTEND_DECLARE(cfiscsi, cfiscsi_frontend); 199 MODULE_DEPEND(cfiscsi, icl, 1, 1, 1); 200 201 static struct icl_pdu * 202 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 203 { 204 205 return (icl_pdu_new(request->ip_conn, flags)); 206 } 207 208 static bool 209 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 210 { 211 const struct iscsi_bhs_scsi_command *bhssc; 212 struct cfiscsi_session *cs; 213 uint32_t cmdsn, curcmdsn; 214 215 cs = PDU_SESSION(request); 216 217 /* 218 * Every incoming PDU - not just NOP-Out - resets the ping timer. 219 * The purpose of the timeout is to reset the connection when it stalls; 220 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 221 * in some queue. 222 */ 223 cs->cs_timeout = 0; 224 225 /* 226 * Immediate commands carry cmdsn, but it is neither incremented nor 227 * verified. 228 */ 229 if (request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) 230 return (false); 231 232 /* 233 * Data-Out PDUs don't contain CmdSN. 234 */ 235 if (request->ip_bhs->bhs_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 236 return (false); 237 238 /* 239 * We're only using fields common for all the request 240 * (initiator -> target) PDUs. 241 */ 242 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 243 curcmdsn = cmdsn = ntohl(bhssc->bhssc_cmdsn); 244 245 /* 246 * Increment session cmdsn and exit if we received the expected value. 247 */ 248 do { 249 if (atomic_fcmpset_32(&cs->cs_cmdsn, &curcmdsn, cmdsn + 1)) 250 return (false); 251 } while (curcmdsn == cmdsn); 252 253 /* 254 * The target MUST silently ignore any non-immediate command outside 255 * of this range. 256 */ 257 if (ISCSI_SNLT(cmdsn, curcmdsn) || 258 ISCSI_SNGT(cmdsn, curcmdsn - 1 + maxtags)) { 259 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 260 "while expected %u", cmdsn, curcmdsn); 261 return (true); 262 } 263 264 /* 265 * We don't support multiple connections now, so any discontinuity in 266 * CmdSN means lost PDUs. Since we don't support PDU retransmission -- 267 * terminate the connection. 268 */ 269 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 270 "while expected %u; dropping connection", 271 cmdsn, curcmdsn); 272 cfiscsi_session_terminate(cs); 273 return (true); 274 } 275 276 static void 277 cfiscsi_pdu_handle(struct icl_pdu *request) 278 { 279 struct cfiscsi_session *cs; 280 bool ignore; 281 282 cs = PDU_SESSION(request); 283 284 ignore = cfiscsi_pdu_update_cmdsn(request); 285 if (ignore) { 286 icl_pdu_free(request); 287 return; 288 } 289 290 /* 291 * Handle the PDU; this includes e.g. receiving the remaining 292 * part of PDU and submitting the SCSI command to CTL 293 * or queueing a reply. The handling routine is responsible 294 * for freeing the PDU when it's no longer needed. 295 */ 296 switch (request->ip_bhs->bhs_opcode & 297 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 298 case ISCSI_BHS_OPCODE_NOP_OUT: 299 cfiscsi_pdu_handle_nop_out(request); 300 break; 301 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 302 cfiscsi_pdu_handle_scsi_command(request); 303 break; 304 case ISCSI_BHS_OPCODE_TASK_REQUEST: 305 cfiscsi_pdu_handle_task_request(request); 306 break; 307 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 308 cfiscsi_pdu_handle_data_out(request); 309 break; 310 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 311 cfiscsi_pdu_handle_logout_request(request); 312 break; 313 default: 314 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 315 "opcode 0x%x; dropping connection", 316 request->ip_bhs->bhs_opcode); 317 icl_pdu_free(request); 318 cfiscsi_session_terminate(cs); 319 } 320 321 } 322 323 static void 324 cfiscsi_receive_callback(struct icl_pdu *request) 325 { 326 #ifdef ICL_KERNEL_PROXY 327 struct cfiscsi_session *cs; 328 329 cs = PDU_SESSION(request); 330 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 331 if (cs->cs_login_pdu == NULL) 332 cs->cs_login_pdu = request; 333 else 334 icl_pdu_free(request); 335 cv_signal(&cs->cs_login_cv); 336 return; 337 } 338 #endif 339 340 cfiscsi_pdu_handle(request); 341 } 342 343 static void 344 cfiscsi_error_callback(struct icl_conn *ic) 345 { 346 struct cfiscsi_session *cs; 347 348 cs = CONN_SESSION(ic); 349 350 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 351 cfiscsi_session_terminate(cs); 352 } 353 354 static int 355 cfiscsi_pdu_prepare(struct icl_pdu *response) 356 { 357 struct cfiscsi_session *cs; 358 struct iscsi_bhs_scsi_response *bhssr; 359 bool advance_statsn = true; 360 uint32_t cmdsn; 361 362 cs = PDU_SESSION(response); 363 364 CFISCSI_SESSION_LOCK_ASSERT(cs); 365 366 /* 367 * We're only using fields common for all the response 368 * (target -> initiator) PDUs. 369 */ 370 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 371 372 /* 373 * 10.8.3: "The StatSN for this connection is not advanced 374 * after this PDU is sent." 375 */ 376 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 377 advance_statsn = false; 378 379 /* 380 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 381 * StatSN for the connection is not advanced after this PDU is sent." 382 */ 383 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 384 bhssr->bhssr_initiator_task_tag == 0xffffffff) 385 advance_statsn = false; 386 387 /* 388 * See the comment below - StatSN is not meaningful and must 389 * not be advanced. 390 */ 391 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 392 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 393 advance_statsn = false; 394 395 /* 396 * 10.7.3: "The fields StatSN, Status, and Residual Count 397 * only have meaningful content if the S bit is set to 1." 398 */ 399 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 400 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 401 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 402 cmdsn = cs->cs_cmdsn; 403 bhssr->bhssr_expcmdsn = htonl(cmdsn); 404 bhssr->bhssr_maxcmdsn = htonl(cmdsn - 1 + 405 imax(0, maxtags - cs->cs_outstanding_ctl_pdus)); 406 407 if (advance_statsn) 408 cs->cs_statsn++; 409 410 return (0); 411 } 412 413 static void 414 cfiscsi_pdu_queue(struct icl_pdu *response) 415 { 416 struct cfiscsi_session *cs; 417 418 cs = PDU_SESSION(response); 419 420 CFISCSI_SESSION_LOCK(cs); 421 cfiscsi_pdu_prepare(response); 422 icl_pdu_queue(response); 423 CFISCSI_SESSION_UNLOCK(cs); 424 } 425 426 static void 427 cfiscsi_pdu_queue_cb(struct icl_pdu *response, icl_pdu_cb cb) 428 { 429 struct cfiscsi_session *cs = PDU_SESSION(response); 430 431 CFISCSI_SESSION_LOCK(cs); 432 cfiscsi_pdu_prepare(response); 433 icl_pdu_queue_cb(response, cb); 434 CFISCSI_SESSION_UNLOCK(cs); 435 } 436 437 static void 438 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 439 { 440 struct cfiscsi_session *cs; 441 struct iscsi_bhs_nop_out *bhsno; 442 struct iscsi_bhs_nop_in *bhsni; 443 struct icl_pdu *response; 444 void *data = NULL; 445 size_t datasize; 446 int error; 447 448 cs = PDU_SESSION(request); 449 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 450 451 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 452 /* 453 * Nothing to do, iscsi_pdu_update_statsn() already 454 * zeroed the timeout. 455 */ 456 icl_pdu_free(request); 457 return; 458 } 459 460 datasize = icl_pdu_data_segment_length(request); 461 if (datasize > 0) { 462 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 463 if (data == NULL) { 464 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 465 "dropping connection"); 466 icl_pdu_free(request); 467 cfiscsi_session_terminate(cs); 468 return; 469 } 470 icl_pdu_get_data(request, 0, data, datasize); 471 } 472 473 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 474 if (response == NULL) { 475 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 476 "droppping connection"); 477 free(data, M_CFISCSI); 478 icl_pdu_free(request); 479 cfiscsi_session_terminate(cs); 480 return; 481 } 482 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 483 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 484 bhsni->bhsni_flags = 0x80; 485 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 486 bhsni->bhsni_target_transfer_tag = 0xffffffff; 487 if (datasize > 0) { 488 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 489 if (error != 0) { 490 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 491 "dropping connection"); 492 free(data, M_CFISCSI); 493 icl_pdu_free(request); 494 icl_pdu_free(response); 495 cfiscsi_session_terminate(cs); 496 return; 497 } 498 free(data, M_CFISCSI); 499 } 500 501 icl_pdu_free(request); 502 cfiscsi_pdu_queue(response); 503 } 504 505 static void 506 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 507 { 508 struct iscsi_bhs_scsi_command *bhssc; 509 struct cfiscsi_session *cs; 510 union ctl_io *io; 511 int error; 512 513 cs = PDU_SESSION(request); 514 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 515 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 516 // bhssc->bhssc_initiator_task_tag); 517 518 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 519 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 520 "ImmediateData=No; dropping connection"); 521 icl_pdu_free(request); 522 cfiscsi_session_terminate(cs); 523 return; 524 } 525 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 526 ctl_zero_io(io); 527 PRIV_REQUEST(io) = request; 528 io->io_hdr.io_type = CTL_IO_SCSI; 529 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 530 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 531 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 532 io->scsiio.priority = (bhssc->bhssc_pri & BHSSC_PRI_MASK) >> 533 BHSSC_PRI_SHIFT; 534 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 535 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 536 case BHSSC_FLAGS_ATTR_UNTAGGED: 537 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 538 break; 539 case BHSSC_FLAGS_ATTR_SIMPLE: 540 io->scsiio.tag_type = CTL_TAG_SIMPLE; 541 break; 542 case BHSSC_FLAGS_ATTR_ORDERED: 543 io->scsiio.tag_type = CTL_TAG_ORDERED; 544 break; 545 case BHSSC_FLAGS_ATTR_HOQ: 546 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 547 break; 548 case BHSSC_FLAGS_ATTR_ACA: 549 io->scsiio.tag_type = CTL_TAG_ACA; 550 break; 551 default: 552 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 553 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 554 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 555 break; 556 } 557 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 558 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 559 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 560 error = ctl_run(io); 561 if (error != CTL_RETVAL_COMPLETE) { 562 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; " 563 "dropping connection", error); 564 ctl_free_io(io); 565 refcount_release(&cs->cs_outstanding_ctl_pdus); 566 icl_pdu_free(request); 567 cfiscsi_session_terminate(cs); 568 } 569 } 570 571 static void 572 cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 573 { 574 struct iscsi_bhs_task_management_request *bhstmr; 575 struct iscsi_bhs_task_management_response *bhstmr2; 576 struct icl_pdu *response; 577 struct cfiscsi_session *cs; 578 union ctl_io *io; 579 int error; 580 581 cs = PDU_SESSION(request); 582 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 583 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 584 ctl_zero_io(io); 585 PRIV_REQUEST(io) = request; 586 io->io_hdr.io_type = CTL_IO_TASK; 587 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 588 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 589 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 590 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 591 592 switch (bhstmr->bhstmr_function & ~0x80) { 593 case BHSTMR_FUNCTION_ABORT_TASK: 594 #if 0 595 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 596 #endif 597 io->taskio.task_action = CTL_TASK_ABORT_TASK; 598 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 599 break; 600 case BHSTMR_FUNCTION_ABORT_TASK_SET: 601 #if 0 602 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 603 #endif 604 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 605 break; 606 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 607 #if 0 608 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 609 #endif 610 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 611 break; 612 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 613 #if 0 614 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 615 #endif 616 io->taskio.task_action = CTL_TASK_LUN_RESET; 617 break; 618 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 619 #if 0 620 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 621 #endif 622 io->taskio.task_action = CTL_TASK_TARGET_RESET; 623 break; 624 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 625 #if 0 626 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 627 #endif 628 io->taskio.task_action = CTL_TASK_TARGET_RESET; 629 break; 630 case BHSTMR_FUNCTION_QUERY_TASK: 631 #if 0 632 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 633 #endif 634 io->taskio.task_action = CTL_TASK_QUERY_TASK; 635 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 636 break; 637 case BHSTMR_FUNCTION_QUERY_TASK_SET: 638 #if 0 639 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 640 #endif 641 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 642 break; 643 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 644 #if 0 645 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 646 #endif 647 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 648 break; 649 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 650 #if 0 651 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 652 #endif 653 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 654 break; 655 default: 656 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 657 bhstmr->bhstmr_function & ~0x80); 658 ctl_free_io(io); 659 660 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 661 if (response == NULL) { 662 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 663 "dropping connection"); 664 icl_pdu_free(request); 665 cfiscsi_session_terminate(cs); 666 return; 667 } 668 bhstmr2 = (struct iscsi_bhs_task_management_response *) 669 response->ip_bhs; 670 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 671 bhstmr2->bhstmr_flags = 0x80; 672 bhstmr2->bhstmr_response = 673 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 674 bhstmr2->bhstmr_initiator_task_tag = 675 bhstmr->bhstmr_initiator_task_tag; 676 icl_pdu_free(request); 677 cfiscsi_pdu_queue(response); 678 return; 679 } 680 681 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 682 error = ctl_run(io); 683 if (error != CTL_RETVAL_COMPLETE) { 684 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; " 685 "dropping connection", error); 686 ctl_free_io(io); 687 refcount_release(&cs->cs_outstanding_ctl_pdus); 688 icl_pdu_free(request); 689 cfiscsi_session_terminate(cs); 690 } 691 } 692 693 static bool 694 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 695 { 696 struct iscsi_bhs_data_out *bhsdo; 697 struct cfiscsi_session *cs; 698 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 699 size_t copy_len, len, off, buffer_offset; 700 int ctl_sg_count; 701 union ctl_io *io; 702 703 cs = PDU_SESSION(request); 704 705 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 706 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 707 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 708 ISCSI_BHS_OPCODE_SCSI_COMMAND, 709 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 710 711 /* 712 * We're only using fields common for Data-Out and SCSI Command PDUs. 713 */ 714 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 715 716 io = cdw->cdw_ctl_io; 717 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 718 ("CTL_FLAG_DATA_IN")); 719 720 #if 0 721 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 722 request->ip_data_len, io->scsiio.kern_total_len); 723 #endif 724 725 if (io->scsiio.kern_sg_entries > 0) { 726 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 727 ctl_sg_count = io->scsiio.kern_sg_entries; 728 } else { 729 ctl_sglist = &ctl_sg_entry; 730 ctl_sglist->addr = io->scsiio.kern_data_ptr; 731 ctl_sglist->len = io->scsiio.kern_data_len; 732 ctl_sg_count = 1; 733 } 734 735 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 736 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 737 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 738 else 739 buffer_offset = 0; 740 len = icl_pdu_data_segment_length(request); 741 742 /* 743 * Make sure the offset, as sent by the initiator, matches the offset 744 * we're supposed to be at in the scatter-gather list. 745 */ 746 if (buffer_offset > 747 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 748 buffer_offset + len <= 749 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 750 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 751 "expected %zd; dropping connection", buffer_offset, 752 (size_t)io->scsiio.kern_rel_offset + 753 (size_t)io->scsiio.ext_data_filled); 754 ctl_set_data_phase_error(&io->scsiio); 755 cfiscsi_session_terminate(cs); 756 return (true); 757 } 758 759 /* 760 * This is the offset within the PDU data segment, as opposed 761 * to buffer_offset, which is the offset within the task (SCSI 762 * command). 763 */ 764 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 765 buffer_offset; 766 767 /* 768 * Iterate over the scatter/gather segments, filling them with data 769 * from the PDU data segment. Note that this can get called multiple 770 * times for one SCSI command; the cdw structure holds state for the 771 * scatter/gather list. 772 */ 773 for (;;) { 774 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 775 ("cdw->cdw_sg_index >= ctl_sg_count")); 776 if (cdw->cdw_sg_len == 0) { 777 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 778 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 779 } 780 KASSERT(off <= len, ("len > off")); 781 copy_len = len - off; 782 if (copy_len > cdw->cdw_sg_len) 783 copy_len = cdw->cdw_sg_len; 784 785 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 786 cdw->cdw_sg_addr += copy_len; 787 cdw->cdw_sg_len -= copy_len; 788 off += copy_len; 789 io->scsiio.ext_data_filled += copy_len; 790 io->scsiio.kern_data_resid -= copy_len; 791 792 if (cdw->cdw_sg_len == 0) { 793 /* 794 * End of current segment. 795 */ 796 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 797 /* 798 * Last segment in scatter/gather list. 799 */ 800 break; 801 } 802 cdw->cdw_sg_index++; 803 } 804 805 if (off == len) { 806 /* 807 * End of PDU payload. 808 */ 809 break; 810 } 811 } 812 813 if (len > off) { 814 /* 815 * In case of unsolicited data, it's possible that the buffer 816 * provided by CTL is smaller than negotiated FirstBurstLength. 817 * Just ignore the superfluous data; will ask for them with R2T 818 * on next call to cfiscsi_datamove(). 819 * 820 * This obviously can only happen with SCSI Command PDU. 821 */ 822 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 823 ISCSI_BHS_OPCODE_SCSI_COMMAND) 824 return (true); 825 826 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 827 "expected %zd; dropping connection", 828 icl_pdu_data_segment_length(request), off); 829 ctl_set_data_phase_error(&io->scsiio); 830 cfiscsi_session_terminate(cs); 831 return (true); 832 } 833 834 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 835 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 836 CFISCSI_SESSION_WARN(cs, "got the final packet without " 837 "the F flag; flags = 0x%x; dropping connection", 838 bhsdo->bhsdo_flags); 839 ctl_set_data_phase_error(&io->scsiio); 840 cfiscsi_session_terminate(cs); 841 return (true); 842 } 843 844 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 845 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 846 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 847 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 848 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 849 "transmitted size was %zd bytes instead of %d; " 850 "dropping connection", 851 (size_t)io->scsiio.ext_data_filled, 852 cdw->cdw_r2t_end); 853 ctl_set_data_phase_error(&io->scsiio); 854 cfiscsi_session_terminate(cs); 855 return (true); 856 } else { 857 /* 858 * For SCSI Command PDU, this just means we need to 859 * solicit more data by sending R2T. 860 */ 861 return (false); 862 } 863 } 864 865 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 866 #if 0 867 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 868 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 869 #endif 870 871 return (true); 872 } 873 874 return (false); 875 } 876 877 static void 878 cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 879 { 880 struct iscsi_bhs_data_out *bhsdo; 881 struct cfiscsi_session *cs; 882 struct cfiscsi_data_wait *cdw = NULL; 883 union ctl_io *io; 884 bool done; 885 886 cs = PDU_SESSION(request); 887 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 888 889 CFISCSI_SESSION_LOCK(cs); 890 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 891 #if 0 892 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 893 "ttt 0x%x, itt 0x%x", 894 bhsdo->bhsdo_target_transfer_tag, 895 bhsdo->bhsdo_initiator_task_tag, 896 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 897 #endif 898 if (bhsdo->bhsdo_target_transfer_tag == 899 cdw->cdw_target_transfer_tag) 900 break; 901 } 902 CFISCSI_SESSION_UNLOCK(cs); 903 if (cdw == NULL) { 904 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 905 "0x%x, not found; dropping connection", 906 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 907 icl_pdu_free(request); 908 cfiscsi_session_terminate(cs); 909 return; 910 } 911 912 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 913 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 914 "DataSN %u, while expected %u; dropping connection", 915 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 916 icl_pdu_free(request); 917 cfiscsi_session_terminate(cs); 918 return; 919 } 920 cdw->cdw_datasn += request->ip_additional_pdus + 1; 921 922 io = cdw->cdw_ctl_io; 923 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 924 ("CTL_FLAG_DATA_IN")); 925 926 done = cfiscsi_handle_data_segment(request, cdw); 927 if (done) { 928 CFISCSI_SESSION_LOCK(cs); 929 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 930 CFISCSI_SESSION_UNLOCK(cs); 931 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 932 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 933 cfiscsi_data_wait_free(cs, cdw); 934 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 935 if (done) 936 ctl_datamove_done(io, false); 937 else 938 cfiscsi_datamove_out(io); 939 } 940 941 icl_pdu_free(request); 942 } 943 944 static void 945 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 946 { 947 struct iscsi_bhs_logout_request *bhslr; 948 struct iscsi_bhs_logout_response *bhslr2; 949 struct icl_pdu *response; 950 struct cfiscsi_session *cs; 951 952 cs = PDU_SESSION(request); 953 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 954 switch (bhslr->bhslr_reason & 0x7f) { 955 case BHSLR_REASON_CLOSE_SESSION: 956 case BHSLR_REASON_CLOSE_CONNECTION: 957 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 958 if (response == NULL) { 959 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 960 icl_pdu_free(request); 961 cfiscsi_session_terminate(cs); 962 return; 963 } 964 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 965 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 966 bhslr2->bhslr_flags = 0x80; 967 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 968 bhslr2->bhslr_initiator_task_tag = 969 bhslr->bhslr_initiator_task_tag; 970 icl_pdu_free(request); 971 cfiscsi_pdu_queue(response); 972 cfiscsi_session_terminate(cs); 973 break; 974 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 975 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 976 if (response == NULL) { 977 CFISCSI_SESSION_WARN(cs, 978 "failed to allocate memory; dropping connection"); 979 icl_pdu_free(request); 980 cfiscsi_session_terminate(cs); 981 return; 982 } 983 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 984 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 985 bhslr2->bhslr_flags = 0x80; 986 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 987 bhslr2->bhslr_initiator_task_tag = 988 bhslr->bhslr_initiator_task_tag; 989 icl_pdu_free(request); 990 cfiscsi_pdu_queue(response); 991 break; 992 default: 993 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 994 bhslr->bhslr_reason); 995 icl_pdu_free(request); 996 cfiscsi_session_terminate(cs); 997 break; 998 } 999 } 1000 1001 static void 1002 cfiscsi_callout(void *context) 1003 { 1004 struct icl_pdu *cp; 1005 struct iscsi_bhs_nop_in *bhsni; 1006 struct cfiscsi_session *cs; 1007 1008 cs = context; 1009 1010 if (cs->cs_terminating) 1011 return; 1012 1013 callout_schedule(&cs->cs_callout, 1 * hz); 1014 1015 atomic_add_int(&cs->cs_timeout, 1); 1016 1017 #ifdef ICL_KERNEL_PROXY 1018 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1019 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1020 CFISCSI_SESSION_WARN(cs, "login timed out after " 1021 "%d seconds; dropping connection", cs->cs_timeout); 1022 cfiscsi_session_terminate(cs); 1023 } 1024 return; 1025 } 1026 #endif 1027 1028 if (ping_timeout <= 0) { 1029 /* 1030 * Pings are disabled. Don't send NOP-In in this case; 1031 * user might have disabled pings to work around problems 1032 * with certain initiators that can't properly handle 1033 * NOP-In, such as iPXE. Reset the timeout, to avoid 1034 * triggering reconnection, should the user decide to 1035 * reenable them. 1036 */ 1037 cs->cs_timeout = 0; 1038 return; 1039 } 1040 1041 if (cs->cs_timeout >= ping_timeout) { 1042 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1043 "dropping connection", ping_timeout); 1044 cfiscsi_session_terminate(cs); 1045 return; 1046 } 1047 1048 /* 1049 * If the ping was reset less than one second ago - which means 1050 * that we've received some PDU during the last second - assume 1051 * the traffic flows correctly and don't bother sending a NOP-Out. 1052 * 1053 * (It's 2 - one for one second, and one for incrementing is_timeout 1054 * earlier in this routine.) 1055 */ 1056 if (cs->cs_timeout < 2) 1057 return; 1058 1059 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1060 if (cp == NULL) { 1061 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1062 return; 1063 } 1064 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1065 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1066 bhsni->bhsni_flags = 0x80; 1067 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1068 1069 cfiscsi_pdu_queue(cp); 1070 } 1071 1072 static struct cfiscsi_data_wait * 1073 cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1074 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1075 { 1076 struct cfiscsi_data_wait *cdw; 1077 int error; 1078 1079 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1080 if (cdw == NULL) { 1081 CFISCSI_SESSION_WARN(cs, 1082 "failed to allocate %zd bytes", sizeof(*cdw)); 1083 return (NULL); 1084 } 1085 1086 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1087 &cdw->cdw_icl_prv); 1088 if (error != 0) { 1089 CFISCSI_SESSION_WARN(cs, 1090 "icl_conn_transfer_setup() failed with error %d", error); 1091 uma_zfree(cfiscsi_data_wait_zone, cdw); 1092 return (NULL); 1093 } 1094 1095 cdw->cdw_ctl_io = io; 1096 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1097 cdw->cdw_initiator_task_tag = initiator_task_tag; 1098 1099 return (cdw); 1100 } 1101 1102 static void 1103 cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1104 struct cfiscsi_data_wait *cdw) 1105 { 1106 1107 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1108 uma_zfree(cfiscsi_data_wait_zone, cdw); 1109 } 1110 1111 static void 1112 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1113 { 1114 struct cfiscsi_data_wait *cdw; 1115 union ctl_io *io, *cdw_io; 1116 int error, last, wait; 1117 1118 if (cs->cs_target == NULL) 1119 return; /* No target yet, so nothing to do. */ 1120 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1121 ctl_zero_io(io); 1122 PRIV_REQUEST(io) = cs; 1123 io->io_hdr.io_type = CTL_IO_TASK; 1124 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1125 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1126 io->io_hdr.nexus.targ_lun = 0; 1127 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1128 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1129 wait = cs->cs_outstanding_ctl_pdus; 1130 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1131 error = ctl_run(io); 1132 if (error != CTL_RETVAL_COMPLETE) { 1133 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d", error); 1134 refcount_release(&cs->cs_outstanding_ctl_pdus); 1135 ctl_free_io(io); 1136 } 1137 1138 CFISCSI_SESSION_LOCK(cs); 1139 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1140 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1141 CFISCSI_SESSION_UNLOCK(cs); 1142 /* 1143 * Set nonzero port status; this prevents backends from 1144 * assuming that the data transfer actually succeeded 1145 * and writing uninitialized data to disk. 1146 */ 1147 cdw_io = cdw->cdw_ctl_io; 1148 cdw_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1149 cdw_io->scsiio.io_hdr.port_status = 42; 1150 cfiscsi_data_wait_free(cs, cdw); 1151 ctl_datamove_done(cdw_io, false); 1152 CFISCSI_SESSION_LOCK(cs); 1153 } 1154 CFISCSI_SESSION_UNLOCK(cs); 1155 1156 /* 1157 * Wait for CTL to terminate all the tasks. 1158 */ 1159 if (wait > 0) 1160 CFISCSI_SESSION_WARN(cs, 1161 "waiting for CTL to terminate %d tasks", wait); 1162 for (;;) { 1163 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1164 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1165 if (last != 0) 1166 break; 1167 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1168 0, "cfiscsi_terminate", hz / 100); 1169 } 1170 if (wait > 0) 1171 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1172 } 1173 1174 static void 1175 cfiscsi_maintenance_thread(void *arg) 1176 { 1177 struct cfiscsi_session *cs; 1178 1179 cs = arg; 1180 1181 for (;;) { 1182 CFISCSI_SESSION_LOCK(cs); 1183 if (cs->cs_terminating == false || cs->cs_handoff_in_progress) 1184 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1185 CFISCSI_SESSION_UNLOCK(cs); 1186 1187 if (cs->cs_terminating && cs->cs_handoff_in_progress == false) { 1188 /* 1189 * We used to wait up to 30 seconds to deliver queued 1190 * PDUs to the initiator. We also tried hard to deliver 1191 * SCSI Responses for the aborted PDUs. We don't do 1192 * that anymore. We might need to revisit that. 1193 */ 1194 callout_drain(&cs->cs_callout); 1195 icl_conn_close(cs->cs_conn); 1196 1197 /* 1198 * At this point ICL receive thread is no longer 1199 * running; no new tasks can be queued. 1200 */ 1201 cfiscsi_session_terminate_tasks(cs); 1202 cfiscsi_session_delete(cs); 1203 kthread_exit(); 1204 return; 1205 } 1206 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1207 } 1208 } 1209 1210 static void 1211 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1212 { 1213 1214 cs->cs_terminating = true; 1215 cv_signal(&cs->cs_maintenance_cv); 1216 #ifdef ICL_KERNEL_PROXY 1217 cv_signal(&cs->cs_login_cv); 1218 #endif 1219 } 1220 1221 static int 1222 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1223 { 1224 struct cfiscsi_target *ct; 1225 char *name; 1226 int i; 1227 1228 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1229 1230 ct = cs->cs_target; 1231 name = strdup(cs->cs_initiator_id, M_CTL); 1232 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1233 if (i < 0) { 1234 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1235 i); 1236 cs->cs_ctl_initid = -1; 1237 return (1); 1238 } 1239 cs->cs_ctl_initid = i; 1240 #if 0 1241 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1242 #endif 1243 1244 return (0); 1245 } 1246 1247 static void 1248 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1249 { 1250 int error; 1251 1252 if (cs->cs_ctl_initid == -1) 1253 return; 1254 1255 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1256 if (error != 0) { 1257 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1258 error); 1259 } 1260 cs->cs_ctl_initid = -1; 1261 } 1262 1263 static struct cfiscsi_session * 1264 cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1265 { 1266 struct cfiscsi_session *cs; 1267 int error; 1268 1269 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1270 if (cs == NULL) { 1271 CFISCSI_WARN("malloc failed"); 1272 return (NULL); 1273 } 1274 cs->cs_ctl_initid = -1; 1275 1276 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1277 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1278 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1279 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1280 #ifdef ICL_KERNEL_PROXY 1281 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1282 #endif 1283 1284 /* 1285 * The purpose of this is to avoid racing with session shutdown. 1286 * Otherwise we could have the maintenance thread call icl_conn_close() 1287 * before we call icl_conn_handoff(). 1288 */ 1289 cs->cs_handoff_in_progress = true; 1290 1291 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); 1292 if (cs->cs_conn == NULL) { 1293 free(cs, M_CFISCSI); 1294 return (NULL); 1295 } 1296 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1297 cs->cs_conn->ic_error = cfiscsi_error_callback; 1298 cs->cs_conn->ic_prv0 = cs; 1299 1300 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1301 if (error != 0) { 1302 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1303 free(cs, M_CFISCSI); 1304 return (NULL); 1305 } 1306 1307 mtx_lock(&softc->lock); 1308 cs->cs_id = ++softc->last_session_id; 1309 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1310 mtx_unlock(&softc->lock); 1311 1312 /* 1313 * Start pinging the initiator. 1314 */ 1315 callout_init(&cs->cs_callout, 1); 1316 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1317 1318 return (cs); 1319 } 1320 1321 static void 1322 cfiscsi_session_delete(struct cfiscsi_session *cs) 1323 { 1324 struct cfiscsi_softc *softc; 1325 1326 softc = &cfiscsi_softc; 1327 1328 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1329 ("destroying session with outstanding CTL pdus")); 1330 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1331 ("destroying session with non-empty queue")); 1332 1333 mtx_lock(&softc->lock); 1334 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1335 mtx_unlock(&softc->lock); 1336 1337 cfiscsi_session_unregister_initiator(cs); 1338 if (cs->cs_target != NULL) 1339 cfiscsi_target_release(cs->cs_target); 1340 icl_conn_close(cs->cs_conn); 1341 icl_conn_free(cs->cs_conn); 1342 free(cs, M_CFISCSI); 1343 cv_signal(&softc->sessions_cv); 1344 } 1345 1346 static int 1347 cfiscsi_init(void) 1348 { 1349 struct cfiscsi_softc *softc; 1350 1351 softc = &cfiscsi_softc; 1352 bzero(softc, sizeof(*softc)); 1353 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1354 1355 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1356 #ifdef ICL_KERNEL_PROXY 1357 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1358 #endif 1359 TAILQ_INIT(&softc->sessions); 1360 TAILQ_INIT(&softc->targets); 1361 1362 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1363 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1364 UMA_ALIGN_PTR, 0); 1365 1366 return (0); 1367 } 1368 1369 static int 1370 cfiscsi_shutdown(void) 1371 { 1372 struct cfiscsi_softc *softc = &cfiscsi_softc; 1373 1374 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) 1375 return (EBUSY); 1376 1377 uma_zdestroy(cfiscsi_data_wait_zone); 1378 #ifdef ICL_KERNEL_PROXY 1379 cv_destroy(&softc->accept_cv); 1380 #endif 1381 cv_destroy(&softc->sessions_cv); 1382 mtx_destroy(&softc->lock); 1383 return (0); 1384 } 1385 1386 #ifdef ICL_KERNEL_PROXY 1387 static void 1388 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1389 { 1390 struct cfiscsi_session *cs; 1391 1392 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1393 if (cs == NULL) { 1394 CFISCSI_WARN("failed to create session"); 1395 return; 1396 } 1397 1398 icl_conn_handoff_sock(cs->cs_conn, so); 1399 cs->cs_initiator_sa = sa; 1400 cs->cs_portal_id = portal_id; 1401 cs->cs_handoff_in_progress = false; 1402 cs->cs_waiting_for_ctld = true; 1403 cv_signal(&cfiscsi_softc.accept_cv); 1404 1405 CFISCSI_SESSION_LOCK(cs); 1406 /* 1407 * Wake up the maintenance thread if we got scheduled for termination 1408 * somewhere between cfiscsi_session_new() and icl_conn_handoff_sock(). 1409 */ 1410 if (cs->cs_terminating) 1411 cfiscsi_session_terminate(cs); 1412 CFISCSI_SESSION_UNLOCK(cs); 1413 } 1414 #endif 1415 1416 static void 1417 cfiscsi_online(void *arg) 1418 { 1419 struct cfiscsi_softc *softc; 1420 struct cfiscsi_target *ct; 1421 int online; 1422 1423 ct = (struct cfiscsi_target *)arg; 1424 softc = ct->ct_softc; 1425 1426 mtx_lock(&softc->lock); 1427 if (ct->ct_online) { 1428 mtx_unlock(&softc->lock); 1429 return; 1430 } 1431 ct->ct_online = 1; 1432 online = softc->online++; 1433 mtx_unlock(&softc->lock); 1434 if (online > 0) 1435 return; 1436 1437 #ifdef ICL_KERNEL_PROXY 1438 if (softc->listener != NULL) 1439 icl_listen_free(softc->listener); 1440 softc->listener = icl_listen_new(cfiscsi_accept); 1441 #endif 1442 } 1443 1444 static void 1445 cfiscsi_offline(void *arg) 1446 { 1447 struct cfiscsi_softc *softc; 1448 struct cfiscsi_target *ct; 1449 struct cfiscsi_session *cs; 1450 int error, online; 1451 1452 ct = (struct cfiscsi_target *)arg; 1453 softc = ct->ct_softc; 1454 1455 mtx_lock(&softc->lock); 1456 if (!ct->ct_online) { 1457 mtx_unlock(&softc->lock); 1458 return; 1459 } 1460 ct->ct_online = 0; 1461 online = --softc->online; 1462 1463 do { 1464 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1465 if (cs->cs_target == ct) 1466 cfiscsi_session_terminate(cs); 1467 } 1468 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1469 if (cs->cs_target == ct) 1470 break; 1471 } 1472 if (cs != NULL) { 1473 error = cv_wait_sig(&softc->sessions_cv, &softc->lock); 1474 if (error != 0) { 1475 CFISCSI_SESSION_DEBUG(cs, 1476 "cv_wait failed with error %d\n", error); 1477 break; 1478 } 1479 } 1480 } while (cs != NULL && ct->ct_online == 0); 1481 mtx_unlock(&softc->lock); 1482 if (online > 0) 1483 return; 1484 1485 #ifdef ICL_KERNEL_PROXY 1486 icl_listen_free(softc->listener); 1487 softc->listener = NULL; 1488 #endif 1489 } 1490 1491 static int 1492 cfiscsi_info(void *arg, struct sbuf *sb) 1493 { 1494 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1495 int retval; 1496 1497 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1498 ct->ct_state); 1499 return (retval); 1500 } 1501 1502 static void 1503 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1504 { 1505 struct cfiscsi_softc *softc; 1506 struct cfiscsi_session *cs, *cs2; 1507 struct cfiscsi_target *ct; 1508 struct ctl_iscsi_handoff_params *cihp; 1509 int error; 1510 1511 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1512 softc = &cfiscsi_softc; 1513 1514 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1515 cihp->initiator_name, cihp->initiator_addr, 1516 cihp->target_name); 1517 1518 ct = cfiscsi_target_find(softc, cihp->target_name, 1519 cihp->portal_group_tag); 1520 if (ct == NULL) { 1521 ci->status = CTL_ISCSI_ERROR; 1522 snprintf(ci->error_str, sizeof(ci->error_str), 1523 "%s: target not found", __func__); 1524 return; 1525 } 1526 1527 #ifdef ICL_KERNEL_PROXY 1528 if (cihp->socket > 0 && cihp->connection_id > 0) { 1529 snprintf(ci->error_str, sizeof(ci->error_str), 1530 "both socket and connection_id set"); 1531 ci->status = CTL_ISCSI_ERROR; 1532 cfiscsi_target_release(ct); 1533 return; 1534 } 1535 if (cihp->socket == 0) { 1536 mtx_lock(&cfiscsi_softc.lock); 1537 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1538 if (cs->cs_id == cihp->connection_id) 1539 break; 1540 } 1541 if (cs == NULL) { 1542 mtx_unlock(&cfiscsi_softc.lock); 1543 snprintf(ci->error_str, sizeof(ci->error_str), 1544 "connection not found"); 1545 ci->status = CTL_ISCSI_ERROR; 1546 cfiscsi_target_release(ct); 1547 return; 1548 } 1549 mtx_unlock(&cfiscsi_softc.lock); 1550 } else { 1551 #endif 1552 cs = cfiscsi_session_new(softc, cihp->offload); 1553 if (cs == NULL) { 1554 ci->status = CTL_ISCSI_ERROR; 1555 snprintf(ci->error_str, sizeof(ci->error_str), 1556 "%s: cfiscsi_session_new failed", __func__); 1557 cfiscsi_target_release(ct); 1558 return; 1559 } 1560 #ifdef ICL_KERNEL_PROXY 1561 } 1562 #endif 1563 1564 /* 1565 * First PDU of Full Feature phase has the same CmdSN as the last 1566 * PDU from the Login Phase received from the initiator. Thus, 1567 * the -1 below. 1568 */ 1569 cs->cs_cmdsn = cihp->cmdsn; 1570 cs->cs_statsn = cihp->statsn; 1571 cs->cs_conn->ic_max_recv_data_segment_length = 1572 cihp->max_recv_data_segment_length; 1573 cs->cs_conn->ic_max_send_data_segment_length = 1574 cihp->max_send_data_segment_length; 1575 cs->cs_max_burst_length = cihp->max_burst_length; 1576 cs->cs_first_burst_length = cihp->first_burst_length; 1577 cs->cs_immediate_data = !!cihp->immediate_data; 1578 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1579 cs->cs_conn->ic_header_crc32c = true; 1580 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1581 cs->cs_conn->ic_data_crc32c = true; 1582 1583 strlcpy(cs->cs_initiator_name, 1584 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1585 strlcpy(cs->cs_initiator_addr, 1586 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1587 strlcpy(cs->cs_initiator_alias, 1588 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1589 memcpy(cs->cs_initiator_isid, 1590 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1591 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1592 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1593 cihp->initiator_isid[0], cihp->initiator_isid[1], 1594 cihp->initiator_isid[2], cihp->initiator_isid[3], 1595 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1596 1597 mtx_lock(&softc->lock); 1598 if (ct->ct_online == 0) { 1599 mtx_unlock(&softc->lock); 1600 CFISCSI_SESSION_LOCK(cs); 1601 cs->cs_handoff_in_progress = false; 1602 cfiscsi_session_terminate(cs); 1603 CFISCSI_SESSION_UNLOCK(cs); 1604 cfiscsi_target_release(ct); 1605 ci->status = CTL_ISCSI_ERROR; 1606 snprintf(ci->error_str, sizeof(ci->error_str), 1607 "%s: port offline", __func__); 1608 return; 1609 } 1610 cs->cs_target = ct; 1611 mtx_unlock(&softc->lock); 1612 1613 restart: 1614 if (!cs->cs_terminating) { 1615 mtx_lock(&softc->lock); 1616 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1617 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1618 cs->cs_target == cs2->cs_target && 1619 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1620 if (strcmp(cs->cs_initiator_addr, 1621 cs2->cs_initiator_addr) != 0) { 1622 CFISCSI_SESSION_WARN(cs2, 1623 "session reinstatement from " 1624 "different address %s", 1625 cs->cs_initiator_addr); 1626 } else { 1627 CFISCSI_SESSION_DEBUG(cs2, 1628 "session reinstatement"); 1629 } 1630 cfiscsi_session_terminate(cs2); 1631 mtx_unlock(&softc->lock); 1632 pause("cfiscsi_reinstate", 1); 1633 goto restart; 1634 } 1635 } 1636 mtx_unlock(&softc->lock); 1637 } 1638 1639 /* 1640 * Register initiator with CTL. 1641 */ 1642 cfiscsi_session_register_initiator(cs); 1643 1644 #ifdef ICL_KERNEL_PROXY 1645 if (cihp->socket > 0) { 1646 #endif 1647 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1648 if (error != 0) { 1649 CFISCSI_SESSION_LOCK(cs); 1650 cs->cs_handoff_in_progress = false; 1651 cfiscsi_session_terminate(cs); 1652 CFISCSI_SESSION_UNLOCK(cs); 1653 ci->status = CTL_ISCSI_ERROR; 1654 snprintf(ci->error_str, sizeof(ci->error_str), 1655 "%s: icl_conn_handoff failed with error %d", 1656 __func__, error); 1657 return; 1658 } 1659 #ifdef ICL_KERNEL_PROXY 1660 } 1661 #endif 1662 1663 #ifdef ICL_KERNEL_PROXY 1664 cs->cs_login_phase = false; 1665 1666 /* 1667 * First PDU of the Full Feature phase has likely already arrived. 1668 * We have to pick it up and execute properly. 1669 */ 1670 if (cs->cs_login_pdu != NULL) { 1671 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1672 cfiscsi_pdu_handle(cs->cs_login_pdu); 1673 cs->cs_login_pdu = NULL; 1674 } 1675 #endif 1676 1677 CFISCSI_SESSION_LOCK(cs); 1678 cs->cs_handoff_in_progress = false; 1679 1680 /* 1681 * Wake up the maintenance thread if we got scheduled for termination. 1682 */ 1683 if (cs->cs_terminating) 1684 cfiscsi_session_terminate(cs); 1685 CFISCSI_SESSION_UNLOCK(cs); 1686 1687 ci->status = CTL_ISCSI_OK; 1688 } 1689 1690 static void 1691 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1692 { 1693 struct ctl_iscsi_list_params *cilp; 1694 struct cfiscsi_session *cs; 1695 struct cfiscsi_softc *softc; 1696 struct sbuf *sb; 1697 int error; 1698 1699 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1700 softc = &cfiscsi_softc; 1701 1702 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1703 if (sb == NULL) { 1704 ci->status = CTL_ISCSI_ERROR; 1705 snprintf(ci->error_str, sizeof(ci->error_str), 1706 "Unable to allocate %d bytes for iSCSI session list", 1707 cilp->alloc_len); 1708 return; 1709 } 1710 1711 sbuf_printf(sb, "<ctlislist>\n"); 1712 mtx_lock(&softc->lock); 1713 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1714 if (cs->cs_target == NULL) 1715 continue; 1716 error = sbuf_printf(sb, "<connection id=\"%d\">" 1717 "<initiator>%s</initiator>" 1718 "<initiator_addr>%s</initiator_addr>" 1719 "<initiator_alias>%s</initiator_alias>" 1720 "<target>%s</target>" 1721 "<target_alias>%s</target_alias>" 1722 "<target_portal_group_tag>%u</target_portal_group_tag>" 1723 "<header_digest>%s</header_digest>" 1724 "<data_digest>%s</data_digest>" 1725 "<max_recv_data_segment_length>%d</max_recv_data_segment_length>" 1726 "<max_send_data_segment_length>%d</max_send_data_segment_length>" 1727 "<max_burst_length>%d</max_burst_length>" 1728 "<first_burst_length>%d</first_burst_length>" 1729 "<immediate_data>%d</immediate_data>" 1730 "<iser>%d</iser>" 1731 "<offload>%s</offload>" 1732 "</connection>\n", 1733 cs->cs_id, 1734 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1735 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1736 cs->cs_target->ct_tag, 1737 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1738 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1739 cs->cs_conn->ic_max_recv_data_segment_length, 1740 cs->cs_conn->ic_max_send_data_segment_length, 1741 cs->cs_max_burst_length, 1742 cs->cs_first_burst_length, 1743 cs->cs_immediate_data, 1744 cs->cs_conn->ic_iser, 1745 cs->cs_conn->ic_offload); 1746 if (error != 0) 1747 break; 1748 } 1749 mtx_unlock(&softc->lock); 1750 error = sbuf_printf(sb, "</ctlislist>\n"); 1751 if (error != 0) { 1752 sbuf_delete(sb); 1753 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1754 snprintf(ci->error_str, sizeof(ci->error_str), 1755 "Out of space, %d bytes is too small", cilp->alloc_len); 1756 return; 1757 } 1758 sbuf_finish(sb); 1759 1760 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1761 if (error != 0) { 1762 sbuf_delete(sb); 1763 snprintf(ci->error_str, sizeof(ci->error_str), 1764 "copyout failed with error %d", error); 1765 ci->status = CTL_ISCSI_ERROR; 1766 return; 1767 } 1768 cilp->fill_len = sbuf_len(sb) + 1; 1769 ci->status = CTL_ISCSI_OK; 1770 sbuf_delete(sb); 1771 } 1772 1773 static void 1774 cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1775 { 1776 struct icl_pdu *response; 1777 struct iscsi_bhs_asynchronous_message *bhsam; 1778 struct ctl_iscsi_logout_params *cilp; 1779 struct cfiscsi_session *cs; 1780 struct cfiscsi_softc *softc; 1781 int found = 0; 1782 1783 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1784 softc = &cfiscsi_softc; 1785 1786 mtx_lock(&softc->lock); 1787 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1788 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1789 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1790 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1791 continue; 1792 1793 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1794 if (response == NULL) { 1795 ci->status = CTL_ISCSI_ERROR; 1796 snprintf(ci->error_str, sizeof(ci->error_str), 1797 "Unable to allocate memory"); 1798 mtx_unlock(&softc->lock); 1799 return; 1800 } 1801 bhsam = 1802 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1803 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1804 bhsam->bhsam_flags = 0x80; 1805 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1806 bhsam->bhsam_parameter3 = htons(10); 1807 cfiscsi_pdu_queue(response); 1808 found++; 1809 } 1810 mtx_unlock(&softc->lock); 1811 1812 if (found == 0) { 1813 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1814 snprintf(ci->error_str, sizeof(ci->error_str), 1815 "No matching connections found"); 1816 return; 1817 } 1818 1819 ci->status = CTL_ISCSI_OK; 1820 } 1821 1822 static void 1823 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1824 { 1825 struct icl_pdu *response; 1826 struct iscsi_bhs_asynchronous_message *bhsam; 1827 struct ctl_iscsi_terminate_params *citp; 1828 struct cfiscsi_session *cs; 1829 struct cfiscsi_softc *softc; 1830 int found = 0; 1831 1832 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1833 softc = &cfiscsi_softc; 1834 1835 mtx_lock(&softc->lock); 1836 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1837 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1838 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1839 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1840 continue; 1841 1842 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1843 if (response == NULL) { 1844 /* 1845 * Oh well. Just terminate the connection. 1846 */ 1847 } else { 1848 bhsam = (struct iscsi_bhs_asynchronous_message *) 1849 response->ip_bhs; 1850 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1851 bhsam->bhsam_flags = 0x80; 1852 bhsam->bhsam_0xffffffff = 0xffffffff; 1853 bhsam->bhsam_async_event = 1854 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1855 cfiscsi_pdu_queue(response); 1856 } 1857 cfiscsi_session_terminate(cs); 1858 found++; 1859 } 1860 mtx_unlock(&softc->lock); 1861 1862 if (found == 0) { 1863 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1864 snprintf(ci->error_str, sizeof(ci->error_str), 1865 "No matching connections found"); 1866 return; 1867 } 1868 1869 ci->status = CTL_ISCSI_OK; 1870 } 1871 1872 static void 1873 cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1874 { 1875 struct ctl_iscsi_limits_params *cilp; 1876 struct icl_drv_limits idl; 1877 int error; 1878 1879 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1880 1881 error = icl_limits(cilp->offload, false, &idl); 1882 if (error != 0) { 1883 ci->status = CTL_ISCSI_ERROR; 1884 snprintf(ci->error_str, sizeof(ci->error_str), 1885 "%s: icl_limits failed with error %d", 1886 __func__, error); 1887 return; 1888 } 1889 1890 cilp->max_recv_data_segment_length = 1891 idl.idl_max_recv_data_segment_length; 1892 cilp->max_send_data_segment_length = 1893 idl.idl_max_send_data_segment_length; 1894 cilp->max_burst_length = idl.idl_max_burst_length; 1895 cilp->first_burst_length = idl.idl_first_burst_length; 1896 1897 ci->status = CTL_ISCSI_OK; 1898 } 1899 1900 #ifdef ICL_KERNEL_PROXY 1901 static void 1902 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1903 { 1904 struct ctl_iscsi_listen_params *cilp; 1905 struct sockaddr *sa; 1906 int error; 1907 1908 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1909 1910 if (cfiscsi_softc.listener == NULL) { 1911 CFISCSI_DEBUG("no listener"); 1912 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1913 ci->status = CTL_ISCSI_ERROR; 1914 return; 1915 } 1916 1917 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1918 if (error != 0) { 1919 CFISCSI_DEBUG("getsockaddr, error %d", error); 1920 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1921 ci->status = CTL_ISCSI_ERROR; 1922 return; 1923 } 1924 1925 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1926 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1927 if (error != 0) { 1928 free(sa, M_SONAME); 1929 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1930 snprintf(ci->error_str, sizeof(ci->error_str), 1931 "icl_listen_add failed, error %d", error); 1932 ci->status = CTL_ISCSI_ERROR; 1933 return; 1934 } 1935 1936 ci->status = CTL_ISCSI_OK; 1937 } 1938 1939 static void 1940 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1941 { 1942 struct ctl_iscsi_accept_params *ciap; 1943 struct cfiscsi_session *cs; 1944 int error; 1945 1946 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1947 1948 mtx_lock(&cfiscsi_softc.lock); 1949 for (;;) { 1950 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1951 if (cs->cs_waiting_for_ctld) 1952 break; 1953 } 1954 if (cs != NULL) 1955 break; 1956 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1957 if (error != 0) { 1958 mtx_unlock(&cfiscsi_softc.lock); 1959 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1960 ci->status = CTL_ISCSI_ERROR; 1961 return; 1962 } 1963 } 1964 mtx_unlock(&cfiscsi_softc.lock); 1965 1966 cs->cs_waiting_for_ctld = false; 1967 cs->cs_login_phase = true; 1968 1969 ciap->connection_id = cs->cs_id; 1970 ciap->portal_id = cs->cs_portal_id; 1971 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1972 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1973 cs->cs_initiator_sa->sa_len); 1974 if (error != 0) { 1975 snprintf(ci->error_str, sizeof(ci->error_str), 1976 "copyout failed with error %d", error); 1977 ci->status = CTL_ISCSI_ERROR; 1978 return; 1979 } 1980 1981 ci->status = CTL_ISCSI_OK; 1982 } 1983 1984 static void 1985 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1986 { 1987 struct ctl_iscsi_send_params *cisp; 1988 struct cfiscsi_session *cs; 1989 struct icl_pdu *ip; 1990 size_t datalen; 1991 void *data; 1992 int error; 1993 1994 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1995 1996 mtx_lock(&cfiscsi_softc.lock); 1997 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1998 if (cs->cs_id == cisp->connection_id) 1999 break; 2000 } 2001 if (cs == NULL) { 2002 mtx_unlock(&cfiscsi_softc.lock); 2003 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 2004 ci->status = CTL_ISCSI_ERROR; 2005 return; 2006 } 2007 mtx_unlock(&cfiscsi_softc.lock); 2008 2009 #if 0 2010 if (cs->cs_login_phase == false) 2011 return (EBUSY); 2012 #endif 2013 2014 if (cs->cs_terminating) { 2015 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 2016 ci->status = CTL_ISCSI_ERROR; 2017 return; 2018 } 2019 2020 datalen = cisp->data_segment_len; 2021 /* 2022 * XXX 2023 */ 2024 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 2025 if (datalen > 65535) { 2026 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 2027 ci->status = CTL_ISCSI_ERROR; 2028 return; 2029 } 2030 if (datalen > 0) { 2031 data = malloc(datalen, M_CFISCSI, M_WAITOK); 2032 error = copyin(cisp->data_segment, data, datalen); 2033 if (error != 0) { 2034 free(data, M_CFISCSI); 2035 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 2036 ci->status = CTL_ISCSI_ERROR; 2037 return; 2038 } 2039 } 2040 2041 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 2042 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 2043 if (datalen > 0) { 2044 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 2045 free(data, M_CFISCSI); 2046 } 2047 CFISCSI_SESSION_LOCK(cs); 2048 icl_pdu_queue(ip); 2049 CFISCSI_SESSION_UNLOCK(cs); 2050 ci->status = CTL_ISCSI_OK; 2051 } 2052 2053 static void 2054 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 2055 { 2056 struct ctl_iscsi_receive_params *cirp; 2057 struct cfiscsi_session *cs; 2058 struct icl_pdu *ip; 2059 void *data; 2060 int error; 2061 2062 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2063 2064 mtx_lock(&cfiscsi_softc.lock); 2065 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2066 if (cs->cs_id == cirp->connection_id) 2067 break; 2068 } 2069 if (cs == NULL) { 2070 mtx_unlock(&cfiscsi_softc.lock); 2071 snprintf(ci->error_str, sizeof(ci->error_str), 2072 "connection not found"); 2073 ci->status = CTL_ISCSI_ERROR; 2074 return; 2075 } 2076 mtx_unlock(&cfiscsi_softc.lock); 2077 2078 #if 0 2079 if (is->is_login_phase == false) 2080 return (EBUSY); 2081 #endif 2082 2083 CFISCSI_SESSION_LOCK(cs); 2084 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2085 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2086 if (error != 0) { 2087 CFISCSI_SESSION_UNLOCK(cs); 2088 snprintf(ci->error_str, sizeof(ci->error_str), 2089 "interrupted by signal"); 2090 ci->status = CTL_ISCSI_ERROR; 2091 return; 2092 } 2093 } 2094 2095 if (cs->cs_terminating) { 2096 CFISCSI_SESSION_UNLOCK(cs); 2097 snprintf(ci->error_str, sizeof(ci->error_str), 2098 "connection terminating"); 2099 ci->status = CTL_ISCSI_ERROR; 2100 return; 2101 } 2102 ip = cs->cs_login_pdu; 2103 cs->cs_login_pdu = NULL; 2104 CFISCSI_SESSION_UNLOCK(cs); 2105 2106 if (ip->ip_data_len > cirp->data_segment_len) { 2107 icl_pdu_free(ip); 2108 snprintf(ci->error_str, sizeof(ci->error_str), 2109 "data segment too big"); 2110 ci->status = CTL_ISCSI_ERROR; 2111 return; 2112 } 2113 2114 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2115 if (ip->ip_data_len > 0) { 2116 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2117 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2118 copyout(data, cirp->data_segment, ip->ip_data_len); 2119 free(data, M_CFISCSI); 2120 } 2121 2122 icl_pdu_free(ip); 2123 ci->status = CTL_ISCSI_OK; 2124 } 2125 2126 #endif /* !ICL_KERNEL_PROXY */ 2127 2128 static void 2129 cfiscsi_ioctl_port_create(struct ctl_req *req) 2130 { 2131 struct cfiscsi_target *ct; 2132 struct ctl_port *port; 2133 const char *target, *alias, *val; 2134 struct scsi_vpd_id_descriptor *desc; 2135 int retval, len, idlen; 2136 uint16_t tag; 2137 2138 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2139 alias = dnvlist_get_string(req->args_nvl, "cfiscsi_target_alias", NULL); 2140 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2141 NULL); 2142 2143 if (target == NULL || val == NULL) { 2144 req->status = CTL_LUN_ERROR; 2145 snprintf(req->error_str, sizeof(req->error_str), 2146 "Missing required argument"); 2147 return; 2148 } 2149 2150 tag = strtoul(val, NULL, 0); 2151 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2152 if (ct == NULL) { 2153 req->status = CTL_LUN_ERROR; 2154 snprintf(req->error_str, sizeof(req->error_str), 2155 "failed to create target \"%s\"", target); 2156 return; 2157 } 2158 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2159 req->status = CTL_LUN_ERROR; 2160 snprintf(req->error_str, sizeof(req->error_str), 2161 "target \"%s\" for portal group tag %u already exists", 2162 target, tag); 2163 cfiscsi_target_release(ct); 2164 return; 2165 } 2166 port = &ct->ct_port; 2167 // WAT 2168 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2169 goto done; 2170 2171 port->frontend = &cfiscsi_frontend; 2172 port->port_type = CTL_PORT_ISCSI; 2173 /* XXX KDM what should the real number be here? */ 2174 port->num_requested_ctl_io = 4096; 2175 port->port_name = "iscsi"; 2176 port->physical_port = (int)tag; 2177 port->virtual_port = ct->ct_target_id; 2178 port->port_online = cfiscsi_online; 2179 port->port_offline = cfiscsi_offline; 2180 port->port_info = cfiscsi_info; 2181 port->onoff_arg = ct; 2182 port->fe_datamove = cfiscsi_datamove; 2183 port->fe_done = cfiscsi_done; 2184 port->targ_port = -1; 2185 port->options = nvlist_clone(req->args_nvl); 2186 2187 /* Generate Port ID. */ 2188 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2189 idlen = roundup2(idlen, 4); 2190 len = sizeof(struct scsi_vpd_device_id) + idlen; 2191 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2192 M_CTL, M_WAITOK | M_ZERO); 2193 port->port_devid->len = len; 2194 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2195 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2196 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2197 SVPD_ID_TYPE_SCSI_NAME; 2198 desc->length = idlen; 2199 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2200 2201 /* Generate Target ID. */ 2202 idlen = strlen(target) + 1; 2203 idlen = roundup2(idlen, 4); 2204 len = sizeof(struct scsi_vpd_device_id) + idlen; 2205 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2206 M_CTL, M_WAITOK | M_ZERO); 2207 port->target_devid->len = len; 2208 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2209 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2210 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2211 SVPD_ID_TYPE_SCSI_NAME; 2212 desc->length = idlen; 2213 strlcpy(desc->identifier, target, idlen); 2214 2215 retval = ctl_port_register(port); 2216 if (retval != 0) { 2217 free(port->port_devid, M_CFISCSI); 2218 free(port->target_devid, M_CFISCSI); 2219 cfiscsi_target_release(ct); 2220 req->status = CTL_LUN_ERROR; 2221 snprintf(req->error_str, sizeof(req->error_str), 2222 "ctl_port_register() failed with error %d", retval); 2223 return; 2224 } 2225 done: 2226 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2227 req->status = CTL_LUN_OK; 2228 req->result_nvl = nvlist_create(0); 2229 nvlist_add_number(req->result_nvl, "port_id", port->targ_port); 2230 } 2231 2232 static void 2233 cfiscsi_ioctl_port_remove(struct ctl_req *req) 2234 { 2235 struct cfiscsi_target *ct; 2236 const char *target, *val; 2237 uint16_t tag; 2238 2239 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2240 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2241 NULL); 2242 2243 if (target == NULL || val == NULL) { 2244 req->status = CTL_LUN_ERROR; 2245 snprintf(req->error_str, sizeof(req->error_str), 2246 "Missing required argument"); 2247 return; 2248 } 2249 2250 tag = strtoul(val, NULL, 0); 2251 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2252 if (ct == NULL) { 2253 req->status = CTL_LUN_ERROR; 2254 snprintf(req->error_str, sizeof(req->error_str), 2255 "can't find target \"%s\"", target); 2256 return; 2257 } 2258 2259 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2260 ctl_port_offline(&ct->ct_port); 2261 cfiscsi_target_release(ct); 2262 cfiscsi_target_release(ct); 2263 req->status = CTL_LUN_OK; 2264 } 2265 2266 static int 2267 cfiscsi_ioctl(struct cdev *dev, 2268 u_long cmd, caddr_t addr, int flag, struct thread *td) 2269 { 2270 struct ctl_iscsi *ci; 2271 struct ctl_req *req; 2272 2273 if (cmd == CTL_PORT_REQ) { 2274 req = (struct ctl_req *)addr; 2275 switch (req->reqtype) { 2276 case CTL_REQ_CREATE: 2277 cfiscsi_ioctl_port_create(req); 2278 break; 2279 case CTL_REQ_REMOVE: 2280 cfiscsi_ioctl_port_remove(req); 2281 break; 2282 default: 2283 req->status = CTL_LUN_ERROR; 2284 snprintf(req->error_str, sizeof(req->error_str), 2285 "Unsupported request type %d", req->reqtype); 2286 } 2287 return (0); 2288 } 2289 2290 if (cmd != CTL_ISCSI) 2291 return (ENOTTY); 2292 2293 ci = (struct ctl_iscsi *)addr; 2294 switch (ci->type) { 2295 case CTL_ISCSI_HANDOFF: 2296 cfiscsi_ioctl_handoff(ci); 2297 break; 2298 case CTL_ISCSI_LIST: 2299 cfiscsi_ioctl_list(ci); 2300 break; 2301 case CTL_ISCSI_LOGOUT: 2302 cfiscsi_ioctl_logout(ci); 2303 break; 2304 case CTL_ISCSI_TERMINATE: 2305 cfiscsi_ioctl_terminate(ci); 2306 break; 2307 case CTL_ISCSI_LIMITS: 2308 cfiscsi_ioctl_limits(ci); 2309 break; 2310 #ifdef ICL_KERNEL_PROXY 2311 case CTL_ISCSI_LISTEN: 2312 cfiscsi_ioctl_listen(ci); 2313 break; 2314 case CTL_ISCSI_ACCEPT: 2315 cfiscsi_ioctl_accept(ci); 2316 break; 2317 case CTL_ISCSI_SEND: 2318 cfiscsi_ioctl_send(ci); 2319 break; 2320 case CTL_ISCSI_RECEIVE: 2321 cfiscsi_ioctl_receive(ci); 2322 break; 2323 #else 2324 case CTL_ISCSI_LISTEN: 2325 case CTL_ISCSI_ACCEPT: 2326 case CTL_ISCSI_SEND: 2327 case CTL_ISCSI_RECEIVE: 2328 ci->status = CTL_ISCSI_ERROR; 2329 snprintf(ci->error_str, sizeof(ci->error_str), 2330 "%s: CTL compiled without ICL_KERNEL_PROXY", 2331 __func__); 2332 break; 2333 #endif /* !ICL_KERNEL_PROXY */ 2334 default: 2335 ci->status = CTL_ISCSI_ERROR; 2336 snprintf(ci->error_str, sizeof(ci->error_str), 2337 "%s: invalid iSCSI request type %d", __func__, ci->type); 2338 break; 2339 } 2340 2341 return (0); 2342 } 2343 2344 static void 2345 cfiscsi_target_hold(struct cfiscsi_target *ct) 2346 { 2347 2348 refcount_acquire(&ct->ct_refcount); 2349 } 2350 2351 static void 2352 cfiscsi_target_release(struct cfiscsi_target *ct) 2353 { 2354 struct cfiscsi_softc *softc; 2355 2356 softc = ct->ct_softc; 2357 mtx_lock(&softc->lock); 2358 if (refcount_release(&ct->ct_refcount)) { 2359 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2360 mtx_unlock(&softc->lock); 2361 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2362 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2363 if (ctl_port_deregister(&ct->ct_port) != 0) 2364 printf("%s: ctl_port_deregister() failed\n", 2365 __func__); 2366 } 2367 free(ct, M_CFISCSI); 2368 2369 return; 2370 } 2371 mtx_unlock(&softc->lock); 2372 } 2373 2374 static struct cfiscsi_target * 2375 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2376 { 2377 struct cfiscsi_target *ct; 2378 2379 mtx_lock(&softc->lock); 2380 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2381 if (ct->ct_tag != tag || 2382 strcmp(name, ct->ct_name) != 0 || 2383 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2384 continue; 2385 cfiscsi_target_hold(ct); 2386 mtx_unlock(&softc->lock); 2387 return (ct); 2388 } 2389 mtx_unlock(&softc->lock); 2390 2391 return (NULL); 2392 } 2393 2394 static struct cfiscsi_target * 2395 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2396 const char *alias, uint16_t tag) 2397 { 2398 struct cfiscsi_target *ct, *newct; 2399 2400 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2401 return (NULL); 2402 2403 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2404 2405 mtx_lock(&softc->lock); 2406 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2407 if (ct->ct_tag != tag || 2408 strcmp(name, ct->ct_name) != 0 || 2409 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2410 continue; 2411 cfiscsi_target_hold(ct); 2412 mtx_unlock(&softc->lock); 2413 free(newct, M_CFISCSI); 2414 return (ct); 2415 } 2416 2417 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2418 if (alias != NULL) 2419 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2420 newct->ct_tag = tag; 2421 refcount_init(&newct->ct_refcount, 1); 2422 newct->ct_softc = softc; 2423 if (TAILQ_EMPTY(&softc->targets)) 2424 softc->last_target_id = 0; 2425 newct->ct_target_id = ++softc->last_target_id; 2426 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2427 mtx_unlock(&softc->lock); 2428 2429 return (newct); 2430 } 2431 2432 static void 2433 cfiscsi_pdu_done(struct icl_pdu *ip, int error) 2434 { 2435 2436 if (error != 0) 2437 ; // XXX: Do something on error? 2438 ((ctl_ref)ip->ip_prv0)(ip->ip_prv1, -1); 2439 } 2440 2441 static void 2442 cfiscsi_datamove_in(union ctl_io *io) 2443 { 2444 struct cfiscsi_session *cs; 2445 struct icl_pdu *request, *response; 2446 const struct iscsi_bhs_scsi_command *bhssc; 2447 struct iscsi_bhs_data_in *bhsdi; 2448 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2449 size_t len, expected_len, sg_len, buffer_offset; 2450 size_t max_send_data_segment_length; 2451 const char *sg_addr; 2452 icl_pdu_cb cb; 2453 int ctl_sg_count, error, i; 2454 2455 request = PRIV_REQUEST(io); 2456 cs = PDU_SESSION(request); 2457 2458 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2459 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2460 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2461 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2462 2463 if (io->scsiio.kern_sg_entries > 0) { 2464 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2465 ctl_sg_count = io->scsiio.kern_sg_entries; 2466 } else { 2467 ctl_sglist = &ctl_sg_entry; 2468 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2469 ctl_sglist->len = io->scsiio.kern_data_len; 2470 ctl_sg_count = 1; 2471 } 2472 2473 /* 2474 * This is the offset within the current SCSI command; for the first 2475 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2476 * it will be the sum of lengths of previous ones. 2477 */ 2478 buffer_offset = io->scsiio.kern_rel_offset; 2479 2480 /* 2481 * This is the transfer length expected by the initiator. It can be 2482 * different from the amount of data from the SCSI point of view. 2483 */ 2484 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2485 2486 /* 2487 * If the transfer is outside of expected length -- we are done. 2488 */ 2489 if (buffer_offset >= expected_len) { 2490 #if 0 2491 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2492 "already sent the expected len", buffer_offset); 2493 #endif 2494 ctl_datamove_done(io, true); 2495 return; 2496 } 2497 2498 if (io->scsiio.kern_data_ref != NULL) 2499 cb = cfiscsi_pdu_done; 2500 else 2501 cb = NULL; 2502 2503 i = 0; 2504 sg_addr = NULL; 2505 sg_len = 0; 2506 response = NULL; 2507 bhsdi = NULL; 2508 if (cs->cs_conn->ic_hw_isomax != 0) 2509 max_send_data_segment_length = cs->cs_conn->ic_hw_isomax; 2510 else 2511 max_send_data_segment_length = 2512 cs->cs_conn->ic_max_send_data_segment_length; 2513 for (;;) { 2514 if (response == NULL) { 2515 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2516 if (response == NULL) { 2517 CFISCSI_SESSION_WARN(cs, "failed to " 2518 "allocate memory; dropping connection"); 2519 ctl_set_busy(&io->scsiio); 2520 ctl_datamove_done(io, true); 2521 cfiscsi_session_terminate(cs); 2522 return; 2523 } 2524 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2525 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2526 bhsdi->bhsdi_initiator_task_tag = 2527 bhssc->bhssc_initiator_task_tag; 2528 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2529 bhsdi->bhsdi_datasn = htonl(PRIV_EXPDATASN(io)); 2530 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2531 } 2532 2533 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2534 if (sg_len == 0) { 2535 sg_addr = ctl_sglist[i].addr; 2536 sg_len = ctl_sglist[i].len; 2537 KASSERT(sg_len > 0, ("sg_len <= 0")); 2538 } 2539 2540 len = sg_len; 2541 2542 /* 2543 * Truncate to maximum data segment length. 2544 */ 2545 KASSERT(response->ip_data_len < max_send_data_segment_length, 2546 ("ip_data_len %zd >= max_send_data_segment_length %zd", 2547 response->ip_data_len, max_send_data_segment_length)); 2548 if (response->ip_data_len + len > max_send_data_segment_length) { 2549 len = max_send_data_segment_length - response->ip_data_len; 2550 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2551 len, sg_len)); 2552 } 2553 2554 /* 2555 * Truncate to expected data transfer length. 2556 */ 2557 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2558 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2559 buffer_offset, response->ip_data_len, expected_len)); 2560 if (buffer_offset + response->ip_data_len + len > expected_len) { 2561 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2562 "to expected data transfer length %zd", 2563 buffer_offset + response->ip_data_len + len, expected_len); 2564 len = expected_len - (buffer_offset + response->ip_data_len); 2565 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2566 len, sg_len)); 2567 } 2568 2569 error = icl_pdu_append_data(response, sg_addr, len, 2570 M_NOWAIT | (cb ? ICL_NOCOPY : 0)); 2571 if (error != 0) { 2572 CFISCSI_SESSION_WARN(cs, "failed to " 2573 "allocate memory; dropping connection"); 2574 icl_pdu_free(response); 2575 ctl_set_busy(&io->scsiio); 2576 ctl_datamove_done(io, true); 2577 cfiscsi_session_terminate(cs); 2578 return; 2579 } 2580 sg_addr += len; 2581 sg_len -= len; 2582 io->scsiio.kern_data_resid -= len; 2583 2584 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2585 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2586 buffer_offset, response->ip_data_len, expected_len)); 2587 if (buffer_offset + response->ip_data_len == expected_len) { 2588 /* 2589 * Already have the amount of data the initiator wanted. 2590 */ 2591 break; 2592 } 2593 2594 if (sg_len == 0) { 2595 /* 2596 * End of scatter-gather segment; 2597 * proceed to the next one... 2598 */ 2599 if (i == ctl_sg_count - 1) { 2600 /* 2601 * ... unless this was the last one. 2602 */ 2603 break; 2604 } 2605 i++; 2606 } 2607 2608 if (response->ip_data_len == max_send_data_segment_length) { 2609 /* 2610 * Can't stuff more data into the current PDU; 2611 * queue it. Note that's not enough to check 2612 * for kern_data_resid == 0 instead; there 2613 * may be several Data-In PDUs for the final 2614 * call to cfiscsi_datamove(), and we want 2615 * to set the F flag only on the last of them. 2616 */ 2617 buffer_offset += response->ip_data_len; 2618 if (buffer_offset == io->scsiio.kern_total_len || 2619 buffer_offset == expected_len) { 2620 buffer_offset -= response->ip_data_len; 2621 break; 2622 } 2623 PRIV_EXPDATASN(io) += howmany(response->ip_data_len, 2624 cs->cs_conn->ic_max_send_data_segment_length); 2625 if (cb != NULL) { 2626 response->ip_prv0 = io->scsiio.kern_data_ref; 2627 response->ip_prv1 = io->scsiio.kern_data_arg; 2628 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2629 } 2630 cfiscsi_pdu_queue_cb(response, cb); 2631 response = NULL; 2632 bhsdi = NULL; 2633 } 2634 } 2635 if (response != NULL) { 2636 buffer_offset += response->ip_data_len; 2637 if (buffer_offset == io->scsiio.kern_total_len || 2638 buffer_offset == expected_len) { 2639 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2640 if (io->io_hdr.status == CTL_SUCCESS) { 2641 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2642 if (io->scsiio.kern_total_len < 2643 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2644 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2645 bhsdi->bhsdi_residual_count = 2646 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2647 io->scsiio.kern_total_len); 2648 } else if (io->scsiio.kern_total_len > 2649 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2650 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2651 bhsdi->bhsdi_residual_count = 2652 htonl(io->scsiio.kern_total_len - 2653 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2654 } 2655 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2656 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2657 } 2658 } 2659 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2660 PRIV_EXPDATASN(io) += howmany(response->ip_data_len, 2661 cs->cs_conn->ic_max_send_data_segment_length); 2662 if (cb != NULL) { 2663 response->ip_prv0 = io->scsiio.kern_data_ref; 2664 response->ip_prv1 = io->scsiio.kern_data_arg; 2665 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2666 } 2667 cfiscsi_pdu_queue_cb(response, cb); 2668 } 2669 2670 ctl_datamove_done(io, true); 2671 } 2672 2673 static void 2674 cfiscsi_datamove_out(union ctl_io *io) 2675 { 2676 struct cfiscsi_session *cs; 2677 struct icl_pdu *request, *response; 2678 const struct iscsi_bhs_scsi_command *bhssc; 2679 struct iscsi_bhs_r2t *bhsr2t; 2680 struct cfiscsi_data_wait *cdw; 2681 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2682 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2683 uint32_t target_transfer_tag; 2684 bool done; 2685 2686 request = PRIV_REQUEST(io); 2687 cs = PDU_SESSION(request); 2688 2689 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2690 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2691 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2692 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2693 2694 /* 2695 * Complete write underflow. Not a single byte to read. Return. 2696 */ 2697 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2698 if (io->scsiio.kern_rel_offset >= expected_len) { 2699 ctl_datamove_done(io, true); 2700 return; 2701 } 2702 2703 datamove_len = MIN(io->scsiio.kern_data_len, 2704 expected_len - io->scsiio.kern_rel_offset); 2705 2706 target_transfer_tag = 2707 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2708 if (target_transfer_tag == 0xffffffff) { 2709 target_transfer_tag = 2710 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2711 } 2712 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2713 &target_transfer_tag); 2714 if (cdw == NULL) { 2715 CFISCSI_SESSION_WARN(cs, "failed to " 2716 "allocate memory; dropping connection"); 2717 ctl_set_busy(&io->scsiio); 2718 ctl_datamove_done(io, true); 2719 cfiscsi_session_terminate(cs); 2720 return; 2721 } 2722 #if 0 2723 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2724 "task tag 0x%x, target transfer tag 0x%x", 2725 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2726 #endif 2727 2728 cdw->cdw_ctl_io = io; 2729 cdw->cdw_target_transfer_tag = target_transfer_tag; 2730 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2731 cdw->cdw_r2t_end = datamove_len; 2732 cdw->cdw_datasn = 0; 2733 2734 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2735 if (io->scsiio.kern_sg_entries > 0) { 2736 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2737 } else { 2738 ctl_sglist = &ctl_sg_entry; 2739 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2740 ctl_sglist->len = datamove_len; 2741 } 2742 cdw->cdw_sg_index = 0; 2743 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2744 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2745 r2t_off = io->scsiio.ext_data_filled; 2746 while (r2t_off > 0) { 2747 if (r2t_off >= cdw->cdw_sg_len) { 2748 r2t_off -= cdw->cdw_sg_len; 2749 cdw->cdw_sg_index++; 2750 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2751 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2752 continue; 2753 } 2754 cdw->cdw_sg_addr += r2t_off; 2755 cdw->cdw_sg_len -= r2t_off; 2756 r2t_off = 0; 2757 } 2758 2759 if (cs->cs_immediate_data && 2760 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2761 icl_pdu_data_segment_length(request)) { 2762 done = cfiscsi_handle_data_segment(request, cdw); 2763 if (done) { 2764 cfiscsi_data_wait_free(cs, cdw); 2765 ctl_datamove_done(io, true); 2766 return; 2767 } 2768 } 2769 2770 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2771 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2772 cs->cs_max_burst_length); 2773 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2774 2775 CFISCSI_SESSION_LOCK(cs); 2776 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2777 CFISCSI_SESSION_UNLOCK(cs); 2778 2779 /* 2780 * XXX: We should limit the number of outstanding R2T PDUs 2781 * per task to MaxOutstandingR2T. 2782 */ 2783 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2784 if (response == NULL) { 2785 CFISCSI_SESSION_WARN(cs, "failed to " 2786 "allocate memory; dropping connection"); 2787 ctl_set_busy(&io->scsiio); 2788 ctl_datamove_done(io, true); 2789 cfiscsi_session_terminate(cs); 2790 return; 2791 } 2792 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2793 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2794 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2795 bhsr2t->bhsr2t_flags = 0x80; 2796 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2797 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2798 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2799 /* 2800 * XXX: Here we assume that cfiscsi_datamove() won't ever 2801 * be running concurrently on several CPUs for a given 2802 * command. 2803 */ 2804 bhsr2t->bhsr2t_r2tsn = htonl(PRIV_R2TSN(io)++); 2805 /* 2806 * This is the offset within the current SCSI command; 2807 * i.e. for the first call of datamove(), it will be 0, 2808 * and for subsequent ones it will be the sum of lengths 2809 * of previous ones. 2810 * 2811 * The ext_data_filled is to account for unsolicited 2812 * (immediate) data that might have already arrived. 2813 */ 2814 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2815 /* 2816 * This is the total length (sum of S/G lengths) this call 2817 * to cfiscsi_datamove() is supposed to handle, limited by 2818 * MaxBurstLength. 2819 */ 2820 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2821 cfiscsi_pdu_queue(response); 2822 } 2823 2824 static void 2825 cfiscsi_datamove(union ctl_io *io) 2826 { 2827 2828 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2829 cfiscsi_datamove_in(io); 2830 else { 2831 /* We hadn't received anything during this datamove yet. */ 2832 io->scsiio.ext_data_filled = 0; 2833 cfiscsi_datamove_out(io); 2834 } 2835 } 2836 2837 static void 2838 cfiscsi_scsi_command_done(union ctl_io *io) 2839 { 2840 struct icl_pdu *request, *response; 2841 struct iscsi_bhs_scsi_command *bhssc; 2842 struct iscsi_bhs_scsi_response *bhssr; 2843 #ifdef DIAGNOSTIC 2844 struct cfiscsi_data_wait *cdw; 2845 #endif 2846 struct cfiscsi_session *cs; 2847 uint16_t sense_length; 2848 2849 request = PRIV_REQUEST(io); 2850 cs = PDU_SESSION(request); 2851 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2852 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2853 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2854 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2855 2856 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2857 // bhssc->bhssc_initiator_task_tag); 2858 2859 #ifdef DIAGNOSTIC 2860 CFISCSI_SESSION_LOCK(cs); 2861 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2862 KASSERT(bhssc->bhssc_initiator_task_tag != 2863 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2864 CFISCSI_SESSION_UNLOCK(cs); 2865 #endif 2866 2867 /* 2868 * Do not return status for aborted commands. 2869 * There are exceptions, but none supported by CTL yet. 2870 */ 2871 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2872 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2873 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2874 ctl_free_io(io); 2875 icl_pdu_free(request); 2876 return; 2877 } 2878 2879 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2880 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2881 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2882 bhssr->bhssr_flags = 0x80; 2883 /* 2884 * XXX: We don't deal with bidirectional under/overflows; 2885 * does anything actually support those? 2886 */ 2887 if (io->scsiio.kern_total_len < 2888 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2889 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2890 bhssr->bhssr_residual_count = 2891 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2892 io->scsiio.kern_total_len); 2893 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2894 // ntohl(bhssr->bhssr_residual_count)); 2895 } else if (io->scsiio.kern_total_len > 2896 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2897 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2898 bhssr->bhssr_residual_count = htonl(io->scsiio.kern_total_len - 2899 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2900 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2901 // ntohl(bhssr->bhssr_residual_count)); 2902 } 2903 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2904 bhssr->bhssr_status = io->scsiio.scsi_status; 2905 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2906 bhssr->bhssr_expdatasn = htonl(PRIV_EXPDATASN(io)); 2907 2908 if (io->scsiio.sense_len > 0) { 2909 #if 0 2910 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2911 io->scsiio.sense_len); 2912 #endif 2913 sense_length = htons(io->scsiio.sense_len); 2914 icl_pdu_append_data(response, 2915 &sense_length, sizeof(sense_length), M_WAITOK); 2916 icl_pdu_append_data(response, 2917 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2918 } 2919 2920 ctl_free_io(io); 2921 icl_pdu_free(request); 2922 cfiscsi_pdu_queue(response); 2923 } 2924 2925 static void 2926 cfiscsi_task_management_done(union ctl_io *io) 2927 { 2928 struct icl_pdu *request, *response; 2929 struct iscsi_bhs_task_management_request *bhstmr; 2930 struct iscsi_bhs_task_management_response *bhstmr2; 2931 struct cfiscsi_data_wait *cdw, *tmpcdw; 2932 struct cfiscsi_session *cs, *tcs; 2933 struct cfiscsi_softc *softc; 2934 union ctl_io *cdw_io; 2935 int cold_reset = 0; 2936 2937 request = PRIV_REQUEST(io); 2938 cs = PDU_SESSION(request); 2939 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2940 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2941 ISCSI_BHS_OPCODE_TASK_REQUEST, 2942 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2943 2944 #if 0 2945 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2946 bhstmr->bhstmr_initiator_task_tag, 2947 bhstmr->bhstmr_referenced_task_tag); 2948 #endif 2949 2950 if ((bhstmr->bhstmr_function & ~0x80) == 2951 BHSTMR_FUNCTION_ABORT_TASK) { 2952 /* 2953 * Make sure we no longer wait for Data-Out for this command. 2954 */ 2955 CFISCSI_SESSION_LOCK(cs); 2956 TAILQ_FOREACH_SAFE(cdw, 2957 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2958 if (bhstmr->bhstmr_referenced_task_tag != 2959 cdw->cdw_initiator_task_tag) 2960 continue; 2961 2962 #if 0 2963 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2964 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2965 #endif 2966 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2967 cdw, cdw_next); 2968 cdw_io = cdw->cdw_ctl_io; 2969 cdw_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2970 cdw_io->scsiio.io_hdr.port_status = 43; 2971 cfiscsi_data_wait_free(cs, cdw); 2972 ctl_datamove_done(cdw_io, false); 2973 } 2974 CFISCSI_SESSION_UNLOCK(cs); 2975 } 2976 if ((bhstmr->bhstmr_function & ~0x80) == 2977 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2978 io->io_hdr.status == CTL_SUCCESS) 2979 cold_reset = 1; 2980 2981 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2982 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2983 response->ip_bhs; 2984 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2985 bhstmr2->bhstmr_flags = 0x80; 2986 switch (io->taskio.task_status) { 2987 case CTL_TASK_FUNCTION_COMPLETE: 2988 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2989 break; 2990 case CTL_TASK_FUNCTION_SUCCEEDED: 2991 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2992 break; 2993 case CTL_TASK_LUN_DOES_NOT_EXIST: 2994 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2995 break; 2996 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2997 default: 2998 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2999 break; 3000 } 3001 memcpy(bhstmr2->bhstmr_additional_reponse_information, 3002 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 3003 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 3004 3005 ctl_free_io(io); 3006 icl_pdu_free(request); 3007 cfiscsi_pdu_queue(response); 3008 3009 if (cold_reset) { 3010 softc = cs->cs_target->ct_softc; 3011 mtx_lock(&softc->lock); 3012 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 3013 if (tcs->cs_target == cs->cs_target) 3014 cfiscsi_session_terminate(tcs); 3015 } 3016 mtx_unlock(&softc->lock); 3017 } 3018 } 3019 3020 static void 3021 cfiscsi_done(union ctl_io *io) 3022 { 3023 struct icl_pdu *request; 3024 struct cfiscsi_session *cs; 3025 3026 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 3027 ("invalid CTL status %#x", io->io_hdr.status)); 3028 3029 if (io->io_hdr.io_type == CTL_IO_TASK && 3030 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 3031 /* 3032 * Implicit task termination has just completed; nothing to do. 3033 */ 3034 cs = PRIV_REQUEST(io); 3035 cs->cs_tasks_aborted = true; 3036 refcount_release(&cs->cs_outstanding_ctl_pdus); 3037 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 3038 ctl_free_io(io); 3039 return; 3040 } 3041 3042 request = PRIV_REQUEST(io); 3043 cs = PDU_SESSION(request); 3044 3045 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 3046 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 3047 cfiscsi_scsi_command_done(io); 3048 break; 3049 case ISCSI_BHS_OPCODE_TASK_REQUEST: 3050 cfiscsi_task_management_done(io); 3051 break; 3052 default: 3053 panic("cfiscsi_done called with wrong opcode 0x%x", 3054 request->ip_bhs->bhs_opcode); 3055 } 3056 3057 refcount_release(&cs->cs_outstanding_ctl_pdus); 3058 } 3059