1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 31 /* 32 * CTL frontend for the iSCSI protocol. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/param.h> 39 #include <sys/capsicum.h> 40 #include <sys/condvar.h> 41 #include <sys/endian.h> 42 #include <sys/file.h> 43 #include <sys/kernel.h> 44 #include <sys/kthread.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/module.h> 48 #include <sys/mutex.h> 49 #include <sys/queue.h> 50 #include <sys/sbuf.h> 51 #include <sys/socket.h> 52 #include <sys/sysctl.h> 53 #include <sys/systm.h> 54 #include <sys/uio.h> 55 #include <sys/unistd.h> 56 #include <sys/nv.h> 57 #include <sys/dnv.h> 58 #include <vm/uma.h> 59 60 #include <cam/scsi/scsi_all.h> 61 #include <cam/scsi/scsi_da.h> 62 #include <cam/ctl/ctl_io.h> 63 #include <cam/ctl/ctl.h> 64 #include <cam/ctl/ctl_backend.h> 65 #include <cam/ctl/ctl_error.h> 66 #include <cam/ctl/ctl_frontend.h> 67 #include <cam/ctl/ctl_debug.h> 68 #include <cam/ctl/ctl_ha.h> 69 #include <cam/ctl/ctl_ioctl.h> 70 #include <cam/ctl/ctl_private.h> 71 72 #include <dev/iscsi/icl.h> 73 #include <dev/iscsi/icl_wrappers.h> 74 #include <dev/iscsi/iscsi_proto.h> 75 #include <cam/ctl/ctl_frontend_iscsi.h> 76 77 #ifdef ICL_KERNEL_PROXY 78 #include <sys/socketvar.h> 79 #endif 80 81 #ifdef ICL_KERNEL_PROXY 82 FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 83 #endif 84 85 /* Used for internal nexus reset task. */ 86 #define ISCSI_BHS_OPCODE_INTERNAL 0x3e 87 88 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 89 static uma_zone_t cfiscsi_data_wait_zone; 90 91 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 92 "CAM Target Layer iSCSI Frontend"); 93 static int debug = 1; 94 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 95 &debug, 1, "Enable debug messages"); 96 static int ping_timeout = 5; 97 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 98 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 99 static int login_timeout = 60; 100 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 101 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 102 static int maxtags = 256; 103 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxtags, CTLFLAG_RWTUN, 104 &maxtags, 0, "Max number of requests queued by initiator"); 105 106 #define CFISCSI_DEBUG(X, ...) \ 107 do { \ 108 if (debug > 1) { \ 109 printf("%s: " X "\n", \ 110 __func__, ## __VA_ARGS__); \ 111 } \ 112 } while (0) 113 114 #define CFISCSI_WARN(X, ...) \ 115 do { \ 116 if (debug > 0) { \ 117 printf("WARNING: %s: " X "\n", \ 118 __func__, ## __VA_ARGS__); \ 119 } \ 120 } while (0) 121 122 #define CFISCSI_SESSION_DEBUG(S, X, ...) \ 123 do { \ 124 if (debug > 1) { \ 125 printf("%s: %s (%s): " X "\n", \ 126 __func__, S->cs_initiator_addr, \ 127 S->cs_initiator_name, ## __VA_ARGS__); \ 128 } \ 129 } while (0) 130 131 #define CFISCSI_SESSION_WARN(S, X, ...) \ 132 do { \ 133 if (debug > 0) { \ 134 printf("WARNING: %s (%s): " X "\n", \ 135 S->cs_initiator_addr, \ 136 S->cs_initiator_name, ## __VA_ARGS__); \ 137 } \ 138 } while (0) 139 140 #define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 141 #define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 142 #define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 143 144 #define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 145 #define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 146 147 struct cfiscsi_priv { 148 void *request; 149 uint32_t expdatasn; 150 uint32_t r2tsn; 151 }; 152 #define PRIV(io) \ 153 ((struct cfiscsi_priv *)&(io)->io_hdr.ctl_private[CTL_PRIV_FRONTEND]) 154 #define PRIV_REQUEST(io) PRIV(io)->request 155 #define PRIV_EXPDATASN(io) PRIV(io)->expdatasn 156 #define PRIV_R2TSN(io) PRIV(io)->r2tsn 157 158 static int cfiscsi_init(void); 159 static int cfiscsi_shutdown(void); 160 static void cfiscsi_online(void *arg); 161 static void cfiscsi_offline(void *arg); 162 static int cfiscsi_info(void *arg, struct sbuf *sb); 163 static int cfiscsi_ioctl(struct cdev *dev, 164 u_long cmd, caddr_t addr, int flag, struct thread *td); 165 static void cfiscsi_datamove(union ctl_io *io); 166 static void cfiscsi_datamove_in(union ctl_io *io); 167 static void cfiscsi_datamove_out(union ctl_io *io); 168 static void cfiscsi_done(union ctl_io *io); 169 static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 170 static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 171 static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 172 static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 173 static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 174 static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 175 static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 176 static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 177 struct cfiscsi_session *cs, union ctl_io *io, 178 uint32_t initiator_task_tag, 179 uint32_t *target_transfer_tagp); 180 static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 181 struct cfiscsi_data_wait *cdw); 182 static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 183 *softc, const char *name, uint16_t tag); 184 static struct cfiscsi_target *cfiscsi_target_find_or_create( 185 struct cfiscsi_softc *softc, const char *name, const char *alias, 186 uint16_t tag); 187 static void cfiscsi_target_release(struct cfiscsi_target *ct); 188 static void cfiscsi_session_delete(struct cfiscsi_session *cs); 189 190 static struct cfiscsi_softc cfiscsi_softc; 191 192 static struct ctl_frontend cfiscsi_frontend = 193 { 194 .name = "iscsi", 195 .init = cfiscsi_init, 196 .ioctl = cfiscsi_ioctl, 197 .shutdown = cfiscsi_shutdown, 198 }; 199 CTL_FRONTEND_DECLARE(cfiscsi, cfiscsi_frontend); 200 MODULE_DEPEND(cfiscsi, icl, 1, 1, 1); 201 202 static struct icl_pdu * 203 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 204 { 205 206 return (icl_pdu_new(request->ip_conn, flags)); 207 } 208 209 static bool 210 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 211 { 212 const struct iscsi_bhs_scsi_command *bhssc; 213 struct cfiscsi_session *cs; 214 uint32_t cmdsn, curcmdsn; 215 216 cs = PDU_SESSION(request); 217 218 /* 219 * Every incoming PDU - not just NOP-Out - resets the ping timer. 220 * The purpose of the timeout is to reset the connection when it stalls; 221 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 222 * in some queue. 223 */ 224 cs->cs_timeout = 0; 225 226 /* 227 * Immediate commands carry cmdsn, but it is neither incremented nor 228 * verified. 229 */ 230 if (request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) 231 return (false); 232 233 /* 234 * Data-Out PDUs don't contain CmdSN. 235 */ 236 if (request->ip_bhs->bhs_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 237 return (false); 238 239 /* 240 * We're only using fields common for all the request 241 * (initiator -> target) PDUs. 242 */ 243 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 244 curcmdsn = cmdsn = ntohl(bhssc->bhssc_cmdsn); 245 246 /* 247 * Increment session cmdsn and exit if we received the expected value. 248 */ 249 do { 250 if (atomic_fcmpset_32(&cs->cs_cmdsn, &curcmdsn, cmdsn + 1)) 251 return (false); 252 } while (curcmdsn == cmdsn); 253 254 /* 255 * The target MUST silently ignore any non-immediate command outside 256 * of this range. 257 */ 258 if (ISCSI_SNLT(cmdsn, curcmdsn) || 259 ISCSI_SNGT(cmdsn, curcmdsn - 1 + maxtags)) { 260 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 261 "while expected %u", cmdsn, curcmdsn); 262 return (true); 263 } 264 265 /* 266 * We don't support multiple connections now, so any discontinuity in 267 * CmdSN means lost PDUs. Since we don't support PDU retransmission -- 268 * terminate the connection. 269 */ 270 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 271 "while expected %u; dropping connection", 272 cmdsn, curcmdsn); 273 cfiscsi_session_terminate(cs); 274 return (true); 275 } 276 277 static void 278 cfiscsi_pdu_handle(struct icl_pdu *request) 279 { 280 struct cfiscsi_session *cs; 281 bool ignore; 282 283 cs = PDU_SESSION(request); 284 285 ignore = cfiscsi_pdu_update_cmdsn(request); 286 if (ignore) { 287 icl_pdu_free(request); 288 return; 289 } 290 291 /* 292 * Handle the PDU; this includes e.g. receiving the remaining 293 * part of PDU and submitting the SCSI command to CTL 294 * or queueing a reply. The handling routine is responsible 295 * for freeing the PDU when it's no longer needed. 296 */ 297 switch (request->ip_bhs->bhs_opcode & 298 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 299 case ISCSI_BHS_OPCODE_NOP_OUT: 300 cfiscsi_pdu_handle_nop_out(request); 301 break; 302 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 303 cfiscsi_pdu_handle_scsi_command(request); 304 break; 305 case ISCSI_BHS_OPCODE_TASK_REQUEST: 306 cfiscsi_pdu_handle_task_request(request); 307 break; 308 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 309 cfiscsi_pdu_handle_data_out(request); 310 break; 311 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 312 cfiscsi_pdu_handle_logout_request(request); 313 break; 314 default: 315 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 316 "opcode 0x%x; dropping connection", 317 request->ip_bhs->bhs_opcode); 318 icl_pdu_free(request); 319 cfiscsi_session_terminate(cs); 320 } 321 322 } 323 324 static void 325 cfiscsi_receive_callback(struct icl_pdu *request) 326 { 327 #ifdef ICL_KERNEL_PROXY 328 struct cfiscsi_session *cs; 329 330 cs = PDU_SESSION(request); 331 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 332 if (cs->cs_login_pdu == NULL) 333 cs->cs_login_pdu = request; 334 else 335 icl_pdu_free(request); 336 cv_signal(&cs->cs_login_cv); 337 return; 338 } 339 #endif 340 341 cfiscsi_pdu_handle(request); 342 } 343 344 static void 345 cfiscsi_error_callback(struct icl_conn *ic) 346 { 347 struct cfiscsi_session *cs; 348 349 cs = CONN_SESSION(ic); 350 351 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 352 cfiscsi_session_terminate(cs); 353 } 354 355 static int 356 cfiscsi_pdu_prepare(struct icl_pdu *response) 357 { 358 struct cfiscsi_session *cs; 359 struct iscsi_bhs_scsi_response *bhssr; 360 bool advance_statsn = true; 361 uint32_t cmdsn; 362 363 cs = PDU_SESSION(response); 364 365 CFISCSI_SESSION_LOCK_ASSERT(cs); 366 367 /* 368 * We're only using fields common for all the response 369 * (target -> initiator) PDUs. 370 */ 371 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 372 373 /* 374 * 10.8.3: "The StatSN for this connection is not advanced 375 * after this PDU is sent." 376 */ 377 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 378 advance_statsn = false; 379 380 /* 381 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 382 * StatSN for the connection is not advanced after this PDU is sent." 383 */ 384 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 385 bhssr->bhssr_initiator_task_tag == 0xffffffff) 386 advance_statsn = false; 387 388 /* 389 * See the comment below - StatSN is not meaningful and must 390 * not be advanced. 391 */ 392 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 393 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 394 advance_statsn = false; 395 396 /* 397 * 10.7.3: "The fields StatSN, Status, and Residual Count 398 * only have meaningful content if the S bit is set to 1." 399 */ 400 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 401 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 402 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 403 cmdsn = cs->cs_cmdsn; 404 bhssr->bhssr_expcmdsn = htonl(cmdsn); 405 bhssr->bhssr_maxcmdsn = htonl(cmdsn - 1 + 406 imax(0, maxtags - cs->cs_outstanding_ctl_pdus)); 407 408 if (advance_statsn) 409 cs->cs_statsn++; 410 411 return (0); 412 } 413 414 static void 415 cfiscsi_pdu_queue(struct icl_pdu *response) 416 { 417 struct cfiscsi_session *cs; 418 419 cs = PDU_SESSION(response); 420 421 CFISCSI_SESSION_LOCK(cs); 422 cfiscsi_pdu_prepare(response); 423 icl_pdu_queue(response); 424 CFISCSI_SESSION_UNLOCK(cs); 425 } 426 427 static void 428 cfiscsi_pdu_queue_cb(struct icl_pdu *response, icl_pdu_cb cb) 429 { 430 struct cfiscsi_session *cs = PDU_SESSION(response); 431 432 CFISCSI_SESSION_LOCK(cs); 433 cfiscsi_pdu_prepare(response); 434 icl_pdu_queue_cb(response, cb); 435 CFISCSI_SESSION_UNLOCK(cs); 436 } 437 438 static void 439 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 440 { 441 struct cfiscsi_session *cs; 442 struct iscsi_bhs_nop_out *bhsno; 443 struct iscsi_bhs_nop_in *bhsni; 444 struct icl_pdu *response; 445 void *data = NULL; 446 size_t datasize; 447 int error; 448 449 cs = PDU_SESSION(request); 450 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 451 452 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 453 /* 454 * Nothing to do, iscsi_pdu_update_statsn() already 455 * zeroed the timeout. 456 */ 457 icl_pdu_free(request); 458 return; 459 } 460 461 datasize = icl_pdu_data_segment_length(request); 462 if (datasize > 0) { 463 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 464 if (data == NULL) { 465 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 466 "dropping connection"); 467 icl_pdu_free(request); 468 cfiscsi_session_terminate(cs); 469 return; 470 } 471 icl_pdu_get_data(request, 0, data, datasize); 472 } 473 474 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 475 if (response == NULL) { 476 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 477 "droppping connection"); 478 free(data, M_CFISCSI); 479 icl_pdu_free(request); 480 cfiscsi_session_terminate(cs); 481 return; 482 } 483 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 484 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 485 bhsni->bhsni_flags = 0x80; 486 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 487 bhsni->bhsni_target_transfer_tag = 0xffffffff; 488 if (datasize > 0) { 489 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 490 if (error != 0) { 491 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 492 "dropping connection"); 493 free(data, M_CFISCSI); 494 icl_pdu_free(request); 495 icl_pdu_free(response); 496 cfiscsi_session_terminate(cs); 497 return; 498 } 499 free(data, M_CFISCSI); 500 } 501 502 icl_pdu_free(request); 503 cfiscsi_pdu_queue(response); 504 } 505 506 static void 507 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 508 { 509 struct iscsi_bhs_scsi_command *bhssc; 510 struct cfiscsi_session *cs; 511 union ctl_io *io; 512 int error; 513 514 cs = PDU_SESSION(request); 515 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 516 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 517 // bhssc->bhssc_initiator_task_tag); 518 519 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 520 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 521 "ImmediateData=No; dropping connection"); 522 icl_pdu_free(request); 523 cfiscsi_session_terminate(cs); 524 return; 525 } 526 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 527 ctl_zero_io(io); 528 PRIV_REQUEST(io) = request; 529 io->io_hdr.io_type = CTL_IO_SCSI; 530 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 531 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 532 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 533 io->scsiio.priority = (bhssc->bhssc_pri & BHSSC_PRI_MASK) >> 534 BHSSC_PRI_SHIFT; 535 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 536 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 537 case BHSSC_FLAGS_ATTR_UNTAGGED: 538 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 539 break; 540 case BHSSC_FLAGS_ATTR_SIMPLE: 541 io->scsiio.tag_type = CTL_TAG_SIMPLE; 542 break; 543 case BHSSC_FLAGS_ATTR_ORDERED: 544 io->scsiio.tag_type = CTL_TAG_ORDERED; 545 break; 546 case BHSSC_FLAGS_ATTR_HOQ: 547 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 548 break; 549 case BHSSC_FLAGS_ATTR_ACA: 550 io->scsiio.tag_type = CTL_TAG_ACA; 551 break; 552 default: 553 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 554 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 555 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 556 break; 557 } 558 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 559 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 560 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 561 error = ctl_run(io); 562 if (error != CTL_RETVAL_COMPLETE) { 563 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; " 564 "dropping connection", error); 565 ctl_free_io(io); 566 refcount_release(&cs->cs_outstanding_ctl_pdus); 567 icl_pdu_free(request); 568 cfiscsi_session_terminate(cs); 569 } 570 } 571 572 static void 573 cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 574 { 575 struct iscsi_bhs_task_management_request *bhstmr; 576 struct iscsi_bhs_task_management_response *bhstmr2; 577 struct icl_pdu *response; 578 struct cfiscsi_session *cs; 579 union ctl_io *io; 580 int error; 581 582 cs = PDU_SESSION(request); 583 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 584 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 585 ctl_zero_io(io); 586 PRIV_REQUEST(io) = request; 587 io->io_hdr.io_type = CTL_IO_TASK; 588 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 589 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 590 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 591 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 592 593 switch (bhstmr->bhstmr_function & ~0x80) { 594 case BHSTMR_FUNCTION_ABORT_TASK: 595 #if 0 596 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 597 #endif 598 io->taskio.task_action = CTL_TASK_ABORT_TASK; 599 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 600 break; 601 case BHSTMR_FUNCTION_ABORT_TASK_SET: 602 #if 0 603 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 604 #endif 605 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 606 break; 607 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 608 #if 0 609 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 610 #endif 611 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 612 break; 613 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 614 #if 0 615 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 616 #endif 617 io->taskio.task_action = CTL_TASK_LUN_RESET; 618 break; 619 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 620 #if 0 621 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 622 #endif 623 io->taskio.task_action = CTL_TASK_TARGET_RESET; 624 break; 625 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 626 #if 0 627 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 628 #endif 629 io->taskio.task_action = CTL_TASK_TARGET_RESET; 630 break; 631 case BHSTMR_FUNCTION_QUERY_TASK: 632 #if 0 633 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 634 #endif 635 io->taskio.task_action = CTL_TASK_QUERY_TASK; 636 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 637 break; 638 case BHSTMR_FUNCTION_QUERY_TASK_SET: 639 #if 0 640 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 641 #endif 642 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 643 break; 644 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 645 #if 0 646 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 647 #endif 648 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 649 break; 650 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 651 #if 0 652 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 653 #endif 654 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 655 break; 656 default: 657 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 658 bhstmr->bhstmr_function & ~0x80); 659 ctl_free_io(io); 660 661 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 662 if (response == NULL) { 663 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 664 "dropping connection"); 665 icl_pdu_free(request); 666 cfiscsi_session_terminate(cs); 667 return; 668 } 669 bhstmr2 = (struct iscsi_bhs_task_management_response *) 670 response->ip_bhs; 671 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 672 bhstmr2->bhstmr_flags = 0x80; 673 bhstmr2->bhstmr_response = 674 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 675 bhstmr2->bhstmr_initiator_task_tag = 676 bhstmr->bhstmr_initiator_task_tag; 677 icl_pdu_free(request); 678 cfiscsi_pdu_queue(response); 679 return; 680 } 681 682 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 683 error = ctl_run(io); 684 if (error != CTL_RETVAL_COMPLETE) { 685 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; " 686 "dropping connection", error); 687 ctl_free_io(io); 688 refcount_release(&cs->cs_outstanding_ctl_pdus); 689 icl_pdu_free(request); 690 cfiscsi_session_terminate(cs); 691 } 692 } 693 694 static bool 695 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 696 { 697 struct iscsi_bhs_data_out *bhsdo; 698 struct cfiscsi_session *cs; 699 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 700 size_t copy_len, len, off, buffer_offset; 701 int ctl_sg_count; 702 union ctl_io *io; 703 704 cs = PDU_SESSION(request); 705 706 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 707 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 708 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 709 ISCSI_BHS_OPCODE_SCSI_COMMAND, 710 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 711 712 /* 713 * We're only using fields common for Data-Out and SCSI Command PDUs. 714 */ 715 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 716 717 io = cdw->cdw_ctl_io; 718 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 719 ("CTL_FLAG_DATA_IN")); 720 721 #if 0 722 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 723 request->ip_data_len, io->scsiio.kern_total_len); 724 #endif 725 726 if (io->scsiio.kern_sg_entries > 0) { 727 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 728 ctl_sg_count = io->scsiio.kern_sg_entries; 729 } else { 730 ctl_sglist = &ctl_sg_entry; 731 ctl_sglist->addr = io->scsiio.kern_data_ptr; 732 ctl_sglist->len = io->scsiio.kern_data_len; 733 ctl_sg_count = 1; 734 } 735 736 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 737 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 738 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 739 else 740 buffer_offset = 0; 741 len = icl_pdu_data_segment_length(request); 742 743 /* 744 * Make sure the offset, as sent by the initiator, matches the offset 745 * we're supposed to be at in the scatter-gather list. 746 */ 747 if (buffer_offset > 748 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 749 buffer_offset + len <= 750 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 751 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 752 "expected %zd; dropping connection", buffer_offset, 753 (size_t)io->scsiio.kern_rel_offset + 754 (size_t)io->scsiio.ext_data_filled); 755 ctl_set_data_phase_error(&io->scsiio); 756 cfiscsi_session_terminate(cs); 757 return (true); 758 } 759 760 /* 761 * This is the offset within the PDU data segment, as opposed 762 * to buffer_offset, which is the offset within the task (SCSI 763 * command). 764 */ 765 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 766 buffer_offset; 767 768 /* 769 * Iterate over the scatter/gather segments, filling them with data 770 * from the PDU data segment. Note that this can get called multiple 771 * times for one SCSI command; the cdw structure holds state for the 772 * scatter/gather list. 773 */ 774 for (;;) { 775 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 776 ("cdw->cdw_sg_index >= ctl_sg_count")); 777 if (cdw->cdw_sg_len == 0) { 778 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 779 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 780 } 781 KASSERT(off <= len, ("len > off")); 782 copy_len = len - off; 783 if (copy_len > cdw->cdw_sg_len) 784 copy_len = cdw->cdw_sg_len; 785 786 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 787 cdw->cdw_sg_addr += copy_len; 788 cdw->cdw_sg_len -= copy_len; 789 off += copy_len; 790 io->scsiio.ext_data_filled += copy_len; 791 io->scsiio.kern_data_resid -= copy_len; 792 793 if (cdw->cdw_sg_len == 0) { 794 /* 795 * End of current segment. 796 */ 797 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 798 /* 799 * Last segment in scatter/gather list. 800 */ 801 break; 802 } 803 cdw->cdw_sg_index++; 804 } 805 806 if (off == len) { 807 /* 808 * End of PDU payload. 809 */ 810 break; 811 } 812 } 813 814 if (len > off) { 815 /* 816 * In case of unsolicited data, it's possible that the buffer 817 * provided by CTL is smaller than negotiated FirstBurstLength. 818 * Just ignore the superfluous data; will ask for them with R2T 819 * on next call to cfiscsi_datamove(). 820 * 821 * This obviously can only happen with SCSI Command PDU. 822 */ 823 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 824 ISCSI_BHS_OPCODE_SCSI_COMMAND) 825 return (true); 826 827 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 828 "expected %zd; dropping connection", 829 icl_pdu_data_segment_length(request), off); 830 ctl_set_data_phase_error(&io->scsiio); 831 cfiscsi_session_terminate(cs); 832 return (true); 833 } 834 835 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 836 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 837 CFISCSI_SESSION_WARN(cs, "got the final packet without " 838 "the F flag; flags = 0x%x; dropping connection", 839 bhsdo->bhsdo_flags); 840 ctl_set_data_phase_error(&io->scsiio); 841 cfiscsi_session_terminate(cs); 842 return (true); 843 } 844 845 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 846 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 847 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 848 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 849 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 850 "transmitted size was %zd bytes instead of %d; " 851 "dropping connection", 852 (size_t)io->scsiio.ext_data_filled, 853 cdw->cdw_r2t_end); 854 ctl_set_data_phase_error(&io->scsiio); 855 cfiscsi_session_terminate(cs); 856 return (true); 857 } else { 858 /* 859 * For SCSI Command PDU, this just means we need to 860 * solicit more data by sending R2T. 861 */ 862 return (false); 863 } 864 } 865 866 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 867 #if 0 868 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 869 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 870 #endif 871 872 return (true); 873 } 874 875 return (false); 876 } 877 878 static void 879 cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 880 { 881 struct iscsi_bhs_data_out *bhsdo; 882 struct cfiscsi_session *cs; 883 struct cfiscsi_data_wait *cdw = NULL; 884 union ctl_io *io; 885 bool done; 886 887 cs = PDU_SESSION(request); 888 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 889 890 CFISCSI_SESSION_LOCK(cs); 891 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 892 #if 0 893 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 894 "ttt 0x%x, itt 0x%x", 895 bhsdo->bhsdo_target_transfer_tag, 896 bhsdo->bhsdo_initiator_task_tag, 897 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 898 #endif 899 if (bhsdo->bhsdo_target_transfer_tag == 900 cdw->cdw_target_transfer_tag) 901 break; 902 } 903 CFISCSI_SESSION_UNLOCK(cs); 904 if (cdw == NULL) { 905 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 906 "0x%x, not found; dropping connection", 907 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 908 icl_pdu_free(request); 909 cfiscsi_session_terminate(cs); 910 return; 911 } 912 913 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 914 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 915 "DataSN %u, while expected %u; dropping connection", 916 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 917 icl_pdu_free(request); 918 cfiscsi_session_terminate(cs); 919 return; 920 } 921 cdw->cdw_datasn += request->ip_additional_pdus + 1; 922 923 io = cdw->cdw_ctl_io; 924 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 925 ("CTL_FLAG_DATA_IN")); 926 927 done = cfiscsi_handle_data_segment(request, cdw); 928 if (done) { 929 CFISCSI_SESSION_LOCK(cs); 930 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 931 CFISCSI_SESSION_UNLOCK(cs); 932 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 933 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 934 cfiscsi_data_wait_free(cs, cdw); 935 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 936 if (done) 937 ctl_datamove_done(io, false); 938 else 939 cfiscsi_datamove_out(io); 940 } 941 942 icl_pdu_free(request); 943 } 944 945 static void 946 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 947 { 948 struct iscsi_bhs_logout_request *bhslr; 949 struct iscsi_bhs_logout_response *bhslr2; 950 struct icl_pdu *response; 951 struct cfiscsi_session *cs; 952 953 cs = PDU_SESSION(request); 954 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 955 switch (bhslr->bhslr_reason & 0x7f) { 956 case BHSLR_REASON_CLOSE_SESSION: 957 case BHSLR_REASON_CLOSE_CONNECTION: 958 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 959 if (response == NULL) { 960 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 961 icl_pdu_free(request); 962 cfiscsi_session_terminate(cs); 963 return; 964 } 965 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 966 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 967 bhslr2->bhslr_flags = 0x80; 968 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 969 bhslr2->bhslr_initiator_task_tag = 970 bhslr->bhslr_initiator_task_tag; 971 icl_pdu_free(request); 972 cfiscsi_pdu_queue(response); 973 cfiscsi_session_terminate(cs); 974 break; 975 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 976 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 977 if (response == NULL) { 978 CFISCSI_SESSION_WARN(cs, 979 "failed to allocate memory; dropping connection"); 980 icl_pdu_free(request); 981 cfiscsi_session_terminate(cs); 982 return; 983 } 984 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 985 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 986 bhslr2->bhslr_flags = 0x80; 987 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 988 bhslr2->bhslr_initiator_task_tag = 989 bhslr->bhslr_initiator_task_tag; 990 icl_pdu_free(request); 991 cfiscsi_pdu_queue(response); 992 break; 993 default: 994 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 995 bhslr->bhslr_reason); 996 icl_pdu_free(request); 997 cfiscsi_session_terminate(cs); 998 break; 999 } 1000 } 1001 1002 static void 1003 cfiscsi_callout(void *context) 1004 { 1005 struct icl_pdu *cp; 1006 struct iscsi_bhs_nop_in *bhsni; 1007 struct cfiscsi_session *cs; 1008 1009 cs = context; 1010 1011 if (cs->cs_terminating) 1012 return; 1013 1014 callout_schedule(&cs->cs_callout, 1 * hz); 1015 1016 atomic_add_int(&cs->cs_timeout, 1); 1017 1018 #ifdef ICL_KERNEL_PROXY 1019 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1020 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1021 CFISCSI_SESSION_WARN(cs, "login timed out after " 1022 "%d seconds; dropping connection", cs->cs_timeout); 1023 cfiscsi_session_terminate(cs); 1024 } 1025 return; 1026 } 1027 #endif 1028 1029 if (ping_timeout <= 0) { 1030 /* 1031 * Pings are disabled. Don't send NOP-In in this case; 1032 * user might have disabled pings to work around problems 1033 * with certain initiators that can't properly handle 1034 * NOP-In, such as iPXE. Reset the timeout, to avoid 1035 * triggering reconnection, should the user decide to 1036 * reenable them. 1037 */ 1038 cs->cs_timeout = 0; 1039 return; 1040 } 1041 1042 if (cs->cs_timeout >= ping_timeout) { 1043 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1044 "dropping connection", ping_timeout); 1045 cfiscsi_session_terminate(cs); 1046 return; 1047 } 1048 1049 /* 1050 * If the ping was reset less than one second ago - which means 1051 * that we've received some PDU during the last second - assume 1052 * the traffic flows correctly and don't bother sending a NOP-Out. 1053 * 1054 * (It's 2 - one for one second, and one for incrementing is_timeout 1055 * earlier in this routine.) 1056 */ 1057 if (cs->cs_timeout < 2) 1058 return; 1059 1060 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1061 if (cp == NULL) { 1062 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1063 return; 1064 } 1065 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1066 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1067 bhsni->bhsni_flags = 0x80; 1068 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1069 1070 cfiscsi_pdu_queue(cp); 1071 } 1072 1073 static struct cfiscsi_data_wait * 1074 cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1075 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1076 { 1077 struct cfiscsi_data_wait *cdw; 1078 int error; 1079 1080 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1081 if (cdw == NULL) { 1082 CFISCSI_SESSION_WARN(cs, 1083 "failed to allocate %zd bytes", sizeof(*cdw)); 1084 return (NULL); 1085 } 1086 1087 error = icl_conn_transfer_setup(cs->cs_conn, PRIV_REQUEST(io), io, 1088 target_transfer_tagp, &cdw->cdw_icl_prv); 1089 if (error != 0) { 1090 CFISCSI_SESSION_WARN(cs, 1091 "icl_conn_transfer_setup() failed with error %d", error); 1092 uma_zfree(cfiscsi_data_wait_zone, cdw); 1093 return (NULL); 1094 } 1095 1096 cdw->cdw_ctl_io = io; 1097 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1098 cdw->cdw_initiator_task_tag = initiator_task_tag; 1099 1100 return (cdw); 1101 } 1102 1103 static void 1104 cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1105 struct cfiscsi_data_wait *cdw) 1106 { 1107 1108 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1109 uma_zfree(cfiscsi_data_wait_zone, cdw); 1110 } 1111 1112 static void 1113 cfiscsi_data_wait_abort(struct cfiscsi_session *cs, 1114 struct cfiscsi_data_wait *cdw, int status) 1115 { 1116 union ctl_io *cdw_io; 1117 1118 /* 1119 * Set nonzero port status; this prevents backends from 1120 * assuming that the data transfer actually succeeded 1121 * and writing uninitialized data to disk. 1122 */ 1123 MPASS(status != 0); 1124 cdw_io = cdw->cdw_ctl_io; 1125 cdw_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1126 cdw_io->scsiio.io_hdr.port_status = status; 1127 cfiscsi_data_wait_free(cs, cdw); 1128 ctl_datamove_done(cdw_io, false); 1129 } 1130 1131 static void 1132 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1133 { 1134 struct cfiscsi_data_wait *cdw; 1135 struct icl_pdu *ip; 1136 union ctl_io *io; 1137 int error, last, wait; 1138 1139 if (cs->cs_target == NULL) 1140 return; /* No target yet, so nothing to do. */ 1141 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1142 ip->ip_bhs->bhs_opcode = ISCSI_BHS_OPCODE_INTERNAL; 1143 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1144 ctl_zero_io(io); 1145 PRIV_REQUEST(io) = ip; 1146 io->io_hdr.io_type = CTL_IO_TASK; 1147 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1148 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1149 io->io_hdr.nexus.targ_lun = 0; 1150 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1151 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1152 wait = cs->cs_outstanding_ctl_pdus; 1153 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1154 error = ctl_run(io); 1155 if (error != CTL_RETVAL_COMPLETE) { 1156 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d", error); 1157 refcount_release(&cs->cs_outstanding_ctl_pdus); 1158 ctl_free_io(io); 1159 icl_pdu_free(ip); 1160 } 1161 1162 CFISCSI_SESSION_LOCK(cs); 1163 cs->cs_terminating_tasks = true; 1164 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1165 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1166 CFISCSI_SESSION_UNLOCK(cs); 1167 cfiscsi_data_wait_abort(cs, cdw, 42); 1168 CFISCSI_SESSION_LOCK(cs); 1169 } 1170 CFISCSI_SESSION_UNLOCK(cs); 1171 1172 /* 1173 * Wait for CTL to terminate all the tasks. 1174 */ 1175 if (wait > 0) 1176 CFISCSI_SESSION_WARN(cs, 1177 "waiting for CTL to terminate %d tasks", wait); 1178 for (;;) { 1179 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1180 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1181 if (last != 0) 1182 break; 1183 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1184 0, "cfiscsi_terminate", hz / 100); 1185 } 1186 if (wait > 0) 1187 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1188 } 1189 1190 static void 1191 cfiscsi_maintenance_thread(void *arg) 1192 { 1193 struct cfiscsi_session *cs; 1194 1195 cs = arg; 1196 1197 for (;;) { 1198 CFISCSI_SESSION_LOCK(cs); 1199 if (cs->cs_terminating == false || cs->cs_handoff_in_progress) 1200 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1201 CFISCSI_SESSION_UNLOCK(cs); 1202 1203 if (cs->cs_terminating && cs->cs_handoff_in_progress == false) { 1204 /* 1205 * We used to wait up to 30 seconds to deliver queued 1206 * PDUs to the initiator. We also tried hard to deliver 1207 * SCSI Responses for the aborted PDUs. We don't do 1208 * that anymore. We might need to revisit that. 1209 */ 1210 callout_drain(&cs->cs_callout); 1211 icl_conn_close(cs->cs_conn); 1212 1213 /* 1214 * At this point ICL receive thread is no longer 1215 * running; no new tasks can be queued. 1216 */ 1217 cfiscsi_session_terminate_tasks(cs); 1218 cfiscsi_session_delete(cs); 1219 kthread_exit(); 1220 return; 1221 } 1222 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1223 } 1224 } 1225 1226 static void 1227 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1228 { 1229 1230 cs->cs_terminating = true; 1231 cv_signal(&cs->cs_maintenance_cv); 1232 #ifdef ICL_KERNEL_PROXY 1233 cv_signal(&cs->cs_login_cv); 1234 #endif 1235 } 1236 1237 static int 1238 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1239 { 1240 struct cfiscsi_target *ct; 1241 char *name; 1242 int i; 1243 1244 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1245 1246 ct = cs->cs_target; 1247 name = strdup(cs->cs_initiator_id, M_CTL); 1248 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1249 if (i < 0) { 1250 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1251 i); 1252 cs->cs_ctl_initid = -1; 1253 return (1); 1254 } 1255 cs->cs_ctl_initid = i; 1256 #if 0 1257 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1258 #endif 1259 1260 return (0); 1261 } 1262 1263 static void 1264 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1265 { 1266 int error; 1267 1268 if (cs->cs_ctl_initid == -1) 1269 return; 1270 1271 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1272 if (error != 0) { 1273 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1274 error); 1275 } 1276 cs->cs_ctl_initid = -1; 1277 } 1278 1279 static struct cfiscsi_session * 1280 cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1281 { 1282 struct cfiscsi_session *cs; 1283 int error; 1284 1285 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1286 if (cs == NULL) { 1287 CFISCSI_WARN("malloc failed"); 1288 return (NULL); 1289 } 1290 cs->cs_ctl_initid = -1; 1291 1292 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1293 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1294 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1295 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1296 #ifdef ICL_KERNEL_PROXY 1297 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1298 #endif 1299 1300 /* 1301 * The purpose of this is to avoid racing with session shutdown. 1302 * Otherwise we could have the maintenance thread call icl_conn_close() 1303 * before we call icl_conn_handoff(). 1304 */ 1305 cs->cs_handoff_in_progress = true; 1306 1307 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); 1308 if (cs->cs_conn == NULL) { 1309 free(cs, M_CFISCSI); 1310 return (NULL); 1311 } 1312 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1313 cs->cs_conn->ic_error = cfiscsi_error_callback; 1314 cs->cs_conn->ic_prv0 = cs; 1315 1316 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1317 if (error != 0) { 1318 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1319 free(cs, M_CFISCSI); 1320 return (NULL); 1321 } 1322 1323 mtx_lock(&softc->lock); 1324 cs->cs_id = ++softc->last_session_id; 1325 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1326 mtx_unlock(&softc->lock); 1327 1328 /* 1329 * Start pinging the initiator. 1330 */ 1331 callout_init(&cs->cs_callout, 1); 1332 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1333 1334 return (cs); 1335 } 1336 1337 static void 1338 cfiscsi_session_delete(struct cfiscsi_session *cs) 1339 { 1340 struct cfiscsi_softc *softc; 1341 1342 softc = &cfiscsi_softc; 1343 1344 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1345 ("destroying session with outstanding CTL pdus")); 1346 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1347 ("destroying session with non-empty queue")); 1348 1349 mtx_lock(&softc->lock); 1350 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1351 mtx_unlock(&softc->lock); 1352 1353 cfiscsi_session_unregister_initiator(cs); 1354 if (cs->cs_target != NULL) 1355 cfiscsi_target_release(cs->cs_target); 1356 icl_conn_close(cs->cs_conn); 1357 icl_conn_free(cs->cs_conn); 1358 free(cs, M_CFISCSI); 1359 cv_signal(&softc->sessions_cv); 1360 } 1361 1362 static int 1363 cfiscsi_init(void) 1364 { 1365 struct cfiscsi_softc *softc; 1366 1367 softc = &cfiscsi_softc; 1368 bzero(softc, sizeof(*softc)); 1369 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1370 1371 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1372 #ifdef ICL_KERNEL_PROXY 1373 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1374 #endif 1375 TAILQ_INIT(&softc->sessions); 1376 TAILQ_INIT(&softc->targets); 1377 1378 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1379 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1380 UMA_ALIGN_PTR, 0); 1381 1382 return (0); 1383 } 1384 1385 static int 1386 cfiscsi_shutdown(void) 1387 { 1388 struct cfiscsi_softc *softc = &cfiscsi_softc; 1389 1390 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) 1391 return (EBUSY); 1392 1393 uma_zdestroy(cfiscsi_data_wait_zone); 1394 #ifdef ICL_KERNEL_PROXY 1395 cv_destroy(&softc->accept_cv); 1396 #endif 1397 cv_destroy(&softc->sessions_cv); 1398 mtx_destroy(&softc->lock); 1399 return (0); 1400 } 1401 1402 #ifdef ICL_KERNEL_PROXY 1403 static void 1404 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1405 { 1406 struct cfiscsi_session *cs; 1407 1408 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1409 if (cs == NULL) { 1410 CFISCSI_WARN("failed to create session"); 1411 return; 1412 } 1413 1414 icl_conn_handoff_sock(cs->cs_conn, so); 1415 cs->cs_initiator_sa = sa; 1416 cs->cs_portal_id = portal_id; 1417 cs->cs_handoff_in_progress = false; 1418 cs->cs_waiting_for_ctld = true; 1419 cv_signal(&cfiscsi_softc.accept_cv); 1420 1421 CFISCSI_SESSION_LOCK(cs); 1422 /* 1423 * Wake up the maintenance thread if we got scheduled for termination 1424 * somewhere between cfiscsi_session_new() and icl_conn_handoff_sock(). 1425 */ 1426 if (cs->cs_terminating) 1427 cfiscsi_session_terminate(cs); 1428 CFISCSI_SESSION_UNLOCK(cs); 1429 } 1430 #endif 1431 1432 static void 1433 cfiscsi_online(void *arg) 1434 { 1435 struct cfiscsi_softc *softc; 1436 struct cfiscsi_target *ct; 1437 int online; 1438 1439 ct = (struct cfiscsi_target *)arg; 1440 softc = ct->ct_softc; 1441 1442 mtx_lock(&softc->lock); 1443 if (ct->ct_online) { 1444 mtx_unlock(&softc->lock); 1445 return; 1446 } 1447 ct->ct_online = 1; 1448 online = softc->online++; 1449 mtx_unlock(&softc->lock); 1450 if (online > 0) 1451 return; 1452 1453 #ifdef ICL_KERNEL_PROXY 1454 if (softc->listener != NULL) 1455 icl_listen_free(softc->listener); 1456 softc->listener = icl_listen_new(cfiscsi_accept); 1457 #endif 1458 } 1459 1460 static void 1461 cfiscsi_offline(void *arg) 1462 { 1463 struct cfiscsi_softc *softc; 1464 struct cfiscsi_target *ct; 1465 struct cfiscsi_session *cs; 1466 int error, online; 1467 1468 ct = (struct cfiscsi_target *)arg; 1469 softc = ct->ct_softc; 1470 1471 mtx_lock(&softc->lock); 1472 if (!ct->ct_online) { 1473 mtx_unlock(&softc->lock); 1474 return; 1475 } 1476 ct->ct_online = 0; 1477 online = --softc->online; 1478 1479 do { 1480 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1481 if (cs->cs_target == ct) 1482 cfiscsi_session_terminate(cs); 1483 } 1484 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1485 if (cs->cs_target == ct) 1486 break; 1487 } 1488 if (cs != NULL) { 1489 error = cv_wait_sig(&softc->sessions_cv, &softc->lock); 1490 if (error != 0) { 1491 CFISCSI_SESSION_DEBUG(cs, 1492 "cv_wait failed with error %d\n", error); 1493 break; 1494 } 1495 } 1496 } while (cs != NULL && ct->ct_online == 0); 1497 mtx_unlock(&softc->lock); 1498 if (online > 0) 1499 return; 1500 1501 #ifdef ICL_KERNEL_PROXY 1502 icl_listen_free(softc->listener); 1503 softc->listener = NULL; 1504 #endif 1505 } 1506 1507 static int 1508 cfiscsi_info(void *arg, struct sbuf *sb) 1509 { 1510 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1511 int retval; 1512 1513 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1514 ct->ct_state); 1515 return (retval); 1516 } 1517 1518 static void 1519 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1520 { 1521 struct cfiscsi_softc *softc; 1522 struct cfiscsi_session *cs, *cs2; 1523 struct cfiscsi_target *ct; 1524 struct ctl_iscsi_handoff_params *cihp; 1525 int error; 1526 1527 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1528 softc = &cfiscsi_softc; 1529 1530 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1531 cihp->initiator_name, cihp->initiator_addr, 1532 cihp->target_name); 1533 1534 ct = cfiscsi_target_find(softc, cihp->target_name, 1535 cihp->portal_group_tag); 1536 if (ct == NULL) { 1537 ci->status = CTL_ISCSI_ERROR; 1538 snprintf(ci->error_str, sizeof(ci->error_str), 1539 "%s: target not found", __func__); 1540 return; 1541 } 1542 1543 #ifdef ICL_KERNEL_PROXY 1544 if (cihp->socket > 0 && cihp->connection_id > 0) { 1545 snprintf(ci->error_str, sizeof(ci->error_str), 1546 "both socket and connection_id set"); 1547 ci->status = CTL_ISCSI_ERROR; 1548 cfiscsi_target_release(ct); 1549 return; 1550 } 1551 if (cihp->socket == 0) { 1552 mtx_lock(&cfiscsi_softc.lock); 1553 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1554 if (cs->cs_id == cihp->connection_id) 1555 break; 1556 } 1557 if (cs == NULL) { 1558 mtx_unlock(&cfiscsi_softc.lock); 1559 snprintf(ci->error_str, sizeof(ci->error_str), 1560 "connection not found"); 1561 ci->status = CTL_ISCSI_ERROR; 1562 cfiscsi_target_release(ct); 1563 return; 1564 } 1565 mtx_unlock(&cfiscsi_softc.lock); 1566 } else { 1567 #endif 1568 cs = cfiscsi_session_new(softc, cihp->offload); 1569 if (cs == NULL) { 1570 ci->status = CTL_ISCSI_ERROR; 1571 snprintf(ci->error_str, sizeof(ci->error_str), 1572 "%s: cfiscsi_session_new failed", __func__); 1573 cfiscsi_target_release(ct); 1574 return; 1575 } 1576 #ifdef ICL_KERNEL_PROXY 1577 } 1578 #endif 1579 1580 /* 1581 * First PDU of Full Feature phase has the same CmdSN as the last 1582 * PDU from the Login Phase received from the initiator. Thus, 1583 * the -1 below. 1584 */ 1585 cs->cs_cmdsn = cihp->cmdsn; 1586 cs->cs_statsn = cihp->statsn; 1587 cs->cs_conn->ic_max_recv_data_segment_length = 1588 cihp->max_recv_data_segment_length; 1589 cs->cs_conn->ic_max_send_data_segment_length = 1590 cihp->max_send_data_segment_length; 1591 cs->cs_max_burst_length = cihp->max_burst_length; 1592 cs->cs_first_burst_length = cihp->first_burst_length; 1593 cs->cs_immediate_data = !!cihp->immediate_data; 1594 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1595 cs->cs_conn->ic_header_crc32c = true; 1596 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1597 cs->cs_conn->ic_data_crc32c = true; 1598 1599 strlcpy(cs->cs_initiator_name, 1600 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1601 strlcpy(cs->cs_initiator_addr, 1602 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1603 strlcpy(cs->cs_initiator_alias, 1604 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1605 memcpy(cs->cs_initiator_isid, 1606 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1607 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1608 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1609 cihp->initiator_isid[0], cihp->initiator_isid[1], 1610 cihp->initiator_isid[2], cihp->initiator_isid[3], 1611 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1612 1613 mtx_lock(&softc->lock); 1614 if (ct->ct_online == 0) { 1615 mtx_unlock(&softc->lock); 1616 CFISCSI_SESSION_LOCK(cs); 1617 cs->cs_handoff_in_progress = false; 1618 cfiscsi_session_terminate(cs); 1619 CFISCSI_SESSION_UNLOCK(cs); 1620 cfiscsi_target_release(ct); 1621 ci->status = CTL_ISCSI_ERROR; 1622 snprintf(ci->error_str, sizeof(ci->error_str), 1623 "%s: port offline", __func__); 1624 return; 1625 } 1626 cs->cs_target = ct; 1627 mtx_unlock(&softc->lock); 1628 1629 restart: 1630 if (!cs->cs_terminating) { 1631 mtx_lock(&softc->lock); 1632 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1633 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1634 cs->cs_target == cs2->cs_target && 1635 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1636 if (strcmp(cs->cs_initiator_addr, 1637 cs2->cs_initiator_addr) != 0) { 1638 CFISCSI_SESSION_WARN(cs2, 1639 "session reinstatement from " 1640 "different address %s", 1641 cs->cs_initiator_addr); 1642 } else { 1643 CFISCSI_SESSION_DEBUG(cs2, 1644 "session reinstatement"); 1645 } 1646 cfiscsi_session_terminate(cs2); 1647 mtx_unlock(&softc->lock); 1648 pause("cfiscsi_reinstate", 1); 1649 goto restart; 1650 } 1651 } 1652 mtx_unlock(&softc->lock); 1653 } 1654 1655 /* 1656 * Register initiator with CTL. 1657 */ 1658 cfiscsi_session_register_initiator(cs); 1659 1660 #ifdef ICL_KERNEL_PROXY 1661 if (cihp->socket > 0) { 1662 #endif 1663 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1664 if (error != 0) { 1665 CFISCSI_SESSION_LOCK(cs); 1666 cs->cs_handoff_in_progress = false; 1667 cfiscsi_session_terminate(cs); 1668 CFISCSI_SESSION_UNLOCK(cs); 1669 ci->status = CTL_ISCSI_ERROR; 1670 snprintf(ci->error_str, sizeof(ci->error_str), 1671 "%s: icl_conn_handoff failed with error %d", 1672 __func__, error); 1673 return; 1674 } 1675 #ifdef ICL_KERNEL_PROXY 1676 } 1677 #endif 1678 1679 #ifdef ICL_KERNEL_PROXY 1680 cs->cs_login_phase = false; 1681 1682 /* 1683 * First PDU of the Full Feature phase has likely already arrived. 1684 * We have to pick it up and execute properly. 1685 */ 1686 if (cs->cs_login_pdu != NULL) { 1687 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1688 cfiscsi_pdu_handle(cs->cs_login_pdu); 1689 cs->cs_login_pdu = NULL; 1690 } 1691 #endif 1692 1693 CFISCSI_SESSION_LOCK(cs); 1694 cs->cs_handoff_in_progress = false; 1695 1696 /* 1697 * Wake up the maintenance thread if we got scheduled for termination. 1698 */ 1699 if (cs->cs_terminating) 1700 cfiscsi_session_terminate(cs); 1701 CFISCSI_SESSION_UNLOCK(cs); 1702 1703 ci->status = CTL_ISCSI_OK; 1704 } 1705 1706 static void 1707 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1708 { 1709 struct ctl_iscsi_list_params *cilp; 1710 struct cfiscsi_session *cs; 1711 struct cfiscsi_softc *softc; 1712 struct sbuf *sb; 1713 int error; 1714 1715 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1716 softc = &cfiscsi_softc; 1717 1718 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1719 if (sb == NULL) { 1720 ci->status = CTL_ISCSI_ERROR; 1721 snprintf(ci->error_str, sizeof(ci->error_str), 1722 "Unable to allocate %d bytes for iSCSI session list", 1723 cilp->alloc_len); 1724 return; 1725 } 1726 1727 sbuf_printf(sb, "<ctlislist>\n"); 1728 mtx_lock(&softc->lock); 1729 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1730 if (cs->cs_target == NULL) 1731 continue; 1732 error = sbuf_printf(sb, "<connection id=\"%d\">" 1733 "<initiator>%s</initiator>" 1734 "<initiator_addr>%s</initiator_addr>" 1735 "<initiator_alias>%s</initiator_alias>" 1736 "<target>%s</target>" 1737 "<target_alias>%s</target_alias>" 1738 "<target_portal_group_tag>%u</target_portal_group_tag>" 1739 "<header_digest>%s</header_digest>" 1740 "<data_digest>%s</data_digest>" 1741 "<max_recv_data_segment_length>%d</max_recv_data_segment_length>" 1742 "<max_send_data_segment_length>%d</max_send_data_segment_length>" 1743 "<max_burst_length>%d</max_burst_length>" 1744 "<first_burst_length>%d</first_burst_length>" 1745 "<immediate_data>%d</immediate_data>" 1746 "<iser>%d</iser>" 1747 "<offload>%s</offload>" 1748 "</connection>\n", 1749 cs->cs_id, 1750 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1751 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1752 cs->cs_target->ct_tag, 1753 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1754 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1755 cs->cs_conn->ic_max_recv_data_segment_length, 1756 cs->cs_conn->ic_max_send_data_segment_length, 1757 cs->cs_max_burst_length, 1758 cs->cs_first_burst_length, 1759 cs->cs_immediate_data, 1760 cs->cs_conn->ic_iser, 1761 cs->cs_conn->ic_offload); 1762 if (error != 0) 1763 break; 1764 } 1765 mtx_unlock(&softc->lock); 1766 error = sbuf_printf(sb, "</ctlislist>\n"); 1767 if (error != 0) { 1768 sbuf_delete(sb); 1769 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1770 snprintf(ci->error_str, sizeof(ci->error_str), 1771 "Out of space, %d bytes is too small", cilp->alloc_len); 1772 return; 1773 } 1774 sbuf_finish(sb); 1775 1776 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1777 if (error != 0) { 1778 sbuf_delete(sb); 1779 snprintf(ci->error_str, sizeof(ci->error_str), 1780 "copyout failed with error %d", error); 1781 ci->status = CTL_ISCSI_ERROR; 1782 return; 1783 } 1784 cilp->fill_len = sbuf_len(sb) + 1; 1785 ci->status = CTL_ISCSI_OK; 1786 sbuf_delete(sb); 1787 } 1788 1789 static void 1790 cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1791 { 1792 struct icl_pdu *response; 1793 struct iscsi_bhs_asynchronous_message *bhsam; 1794 struct ctl_iscsi_logout_params *cilp; 1795 struct cfiscsi_session *cs; 1796 struct cfiscsi_softc *softc; 1797 int found = 0; 1798 1799 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1800 softc = &cfiscsi_softc; 1801 1802 mtx_lock(&softc->lock); 1803 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1804 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1805 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1806 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1807 continue; 1808 1809 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1810 if (response == NULL) { 1811 ci->status = CTL_ISCSI_ERROR; 1812 snprintf(ci->error_str, sizeof(ci->error_str), 1813 "Unable to allocate memory"); 1814 mtx_unlock(&softc->lock); 1815 return; 1816 } 1817 bhsam = 1818 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1819 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1820 bhsam->bhsam_flags = 0x80; 1821 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1822 bhsam->bhsam_parameter3 = htons(10); 1823 cfiscsi_pdu_queue(response); 1824 found++; 1825 } 1826 mtx_unlock(&softc->lock); 1827 1828 if (found == 0) { 1829 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1830 snprintf(ci->error_str, sizeof(ci->error_str), 1831 "No matching connections found"); 1832 return; 1833 } 1834 1835 ci->status = CTL_ISCSI_OK; 1836 } 1837 1838 static void 1839 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1840 { 1841 struct icl_pdu *response; 1842 struct iscsi_bhs_asynchronous_message *bhsam; 1843 struct ctl_iscsi_terminate_params *citp; 1844 struct cfiscsi_session *cs; 1845 struct cfiscsi_softc *softc; 1846 int found = 0; 1847 1848 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1849 softc = &cfiscsi_softc; 1850 1851 mtx_lock(&softc->lock); 1852 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1853 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1854 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1855 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1856 continue; 1857 1858 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1859 if (response == NULL) { 1860 /* 1861 * Oh well. Just terminate the connection. 1862 */ 1863 } else { 1864 bhsam = (struct iscsi_bhs_asynchronous_message *) 1865 response->ip_bhs; 1866 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1867 bhsam->bhsam_flags = 0x80; 1868 bhsam->bhsam_0xffffffff = 0xffffffff; 1869 bhsam->bhsam_async_event = 1870 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1871 cfiscsi_pdu_queue(response); 1872 } 1873 cfiscsi_session_terminate(cs); 1874 found++; 1875 } 1876 mtx_unlock(&softc->lock); 1877 1878 if (found == 0) { 1879 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1880 snprintf(ci->error_str, sizeof(ci->error_str), 1881 "No matching connections found"); 1882 return; 1883 } 1884 1885 ci->status = CTL_ISCSI_OK; 1886 } 1887 1888 static void 1889 cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1890 { 1891 struct ctl_iscsi_limits_params *cilp; 1892 struct icl_drv_limits idl; 1893 int error; 1894 1895 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1896 1897 error = icl_limits(cilp->offload, false, cilp->socket, &idl); 1898 if (error != 0) { 1899 ci->status = CTL_ISCSI_ERROR; 1900 snprintf(ci->error_str, sizeof(ci->error_str), 1901 "%s: icl_limits failed with error %d", 1902 __func__, error); 1903 return; 1904 } 1905 1906 cilp->max_recv_data_segment_length = 1907 idl.idl_max_recv_data_segment_length; 1908 cilp->max_send_data_segment_length = 1909 idl.idl_max_send_data_segment_length; 1910 cilp->max_burst_length = idl.idl_max_burst_length; 1911 cilp->first_burst_length = idl.idl_first_burst_length; 1912 1913 ci->status = CTL_ISCSI_OK; 1914 } 1915 1916 #ifdef ICL_KERNEL_PROXY 1917 static void 1918 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1919 { 1920 struct ctl_iscsi_listen_params *cilp; 1921 struct sockaddr *sa; 1922 int error; 1923 1924 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1925 1926 if (cfiscsi_softc.listener == NULL) { 1927 CFISCSI_DEBUG("no listener"); 1928 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1929 ci->status = CTL_ISCSI_ERROR; 1930 return; 1931 } 1932 1933 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1934 if (error != 0) { 1935 CFISCSI_DEBUG("getsockaddr, error %d", error); 1936 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1937 ci->status = CTL_ISCSI_ERROR; 1938 return; 1939 } 1940 1941 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1942 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1943 if (error != 0) { 1944 free(sa, M_SONAME); 1945 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1946 snprintf(ci->error_str, sizeof(ci->error_str), 1947 "icl_listen_add failed, error %d", error); 1948 ci->status = CTL_ISCSI_ERROR; 1949 return; 1950 } 1951 1952 ci->status = CTL_ISCSI_OK; 1953 } 1954 1955 static void 1956 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1957 { 1958 struct ctl_iscsi_accept_params *ciap; 1959 struct cfiscsi_session *cs; 1960 int error; 1961 1962 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1963 1964 mtx_lock(&cfiscsi_softc.lock); 1965 for (;;) { 1966 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1967 if (cs->cs_waiting_for_ctld) 1968 break; 1969 } 1970 if (cs != NULL) 1971 break; 1972 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1973 if (error != 0) { 1974 mtx_unlock(&cfiscsi_softc.lock); 1975 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1976 ci->status = CTL_ISCSI_ERROR; 1977 return; 1978 } 1979 } 1980 mtx_unlock(&cfiscsi_softc.lock); 1981 1982 cs->cs_waiting_for_ctld = false; 1983 cs->cs_login_phase = true; 1984 1985 ciap->connection_id = cs->cs_id; 1986 ciap->portal_id = cs->cs_portal_id; 1987 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1988 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1989 cs->cs_initiator_sa->sa_len); 1990 if (error != 0) { 1991 snprintf(ci->error_str, sizeof(ci->error_str), 1992 "copyout failed with error %d", error); 1993 ci->status = CTL_ISCSI_ERROR; 1994 return; 1995 } 1996 1997 ci->status = CTL_ISCSI_OK; 1998 } 1999 2000 static void 2001 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 2002 { 2003 struct ctl_iscsi_send_params *cisp; 2004 struct cfiscsi_session *cs; 2005 struct icl_pdu *ip; 2006 size_t datalen; 2007 void *data; 2008 int error; 2009 2010 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 2011 2012 mtx_lock(&cfiscsi_softc.lock); 2013 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2014 if (cs->cs_id == cisp->connection_id) 2015 break; 2016 } 2017 if (cs == NULL) { 2018 mtx_unlock(&cfiscsi_softc.lock); 2019 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 2020 ci->status = CTL_ISCSI_ERROR; 2021 return; 2022 } 2023 mtx_unlock(&cfiscsi_softc.lock); 2024 2025 #if 0 2026 if (cs->cs_login_phase == false) 2027 return (EBUSY); 2028 #endif 2029 2030 if (cs->cs_terminating) { 2031 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 2032 ci->status = CTL_ISCSI_ERROR; 2033 return; 2034 } 2035 2036 datalen = cisp->data_segment_len; 2037 /* 2038 * XXX 2039 */ 2040 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 2041 if (datalen > 65535) { 2042 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 2043 ci->status = CTL_ISCSI_ERROR; 2044 return; 2045 } 2046 if (datalen > 0) { 2047 data = malloc(datalen, M_CFISCSI, M_WAITOK); 2048 error = copyin(cisp->data_segment, data, datalen); 2049 if (error != 0) { 2050 free(data, M_CFISCSI); 2051 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 2052 ci->status = CTL_ISCSI_ERROR; 2053 return; 2054 } 2055 } 2056 2057 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 2058 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 2059 if (datalen > 0) { 2060 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 2061 free(data, M_CFISCSI); 2062 } 2063 CFISCSI_SESSION_LOCK(cs); 2064 icl_pdu_queue(ip); 2065 CFISCSI_SESSION_UNLOCK(cs); 2066 ci->status = CTL_ISCSI_OK; 2067 } 2068 2069 static void 2070 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 2071 { 2072 struct ctl_iscsi_receive_params *cirp; 2073 struct cfiscsi_session *cs; 2074 struct icl_pdu *ip; 2075 void *data; 2076 int error; 2077 2078 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2079 2080 mtx_lock(&cfiscsi_softc.lock); 2081 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2082 if (cs->cs_id == cirp->connection_id) 2083 break; 2084 } 2085 if (cs == NULL) { 2086 mtx_unlock(&cfiscsi_softc.lock); 2087 snprintf(ci->error_str, sizeof(ci->error_str), 2088 "connection not found"); 2089 ci->status = CTL_ISCSI_ERROR; 2090 return; 2091 } 2092 mtx_unlock(&cfiscsi_softc.lock); 2093 2094 #if 0 2095 if (is->is_login_phase == false) 2096 return (EBUSY); 2097 #endif 2098 2099 CFISCSI_SESSION_LOCK(cs); 2100 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2101 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2102 if (error != 0) { 2103 CFISCSI_SESSION_UNLOCK(cs); 2104 snprintf(ci->error_str, sizeof(ci->error_str), 2105 "interrupted by signal"); 2106 ci->status = CTL_ISCSI_ERROR; 2107 return; 2108 } 2109 } 2110 2111 if (cs->cs_terminating) { 2112 CFISCSI_SESSION_UNLOCK(cs); 2113 snprintf(ci->error_str, sizeof(ci->error_str), 2114 "connection terminating"); 2115 ci->status = CTL_ISCSI_ERROR; 2116 return; 2117 } 2118 ip = cs->cs_login_pdu; 2119 cs->cs_login_pdu = NULL; 2120 CFISCSI_SESSION_UNLOCK(cs); 2121 2122 if (ip->ip_data_len > cirp->data_segment_len) { 2123 icl_pdu_free(ip); 2124 snprintf(ci->error_str, sizeof(ci->error_str), 2125 "data segment too big"); 2126 ci->status = CTL_ISCSI_ERROR; 2127 return; 2128 } 2129 2130 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2131 if (ip->ip_data_len > 0) { 2132 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2133 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2134 copyout(data, cirp->data_segment, ip->ip_data_len); 2135 free(data, M_CFISCSI); 2136 } 2137 2138 icl_pdu_free(ip); 2139 ci->status = CTL_ISCSI_OK; 2140 } 2141 2142 #endif /* !ICL_KERNEL_PROXY */ 2143 2144 static void 2145 cfiscsi_ioctl_port_create(struct ctl_req *req) 2146 { 2147 struct cfiscsi_target *ct; 2148 struct ctl_port *port; 2149 const char *target, *alias, *val; 2150 struct scsi_vpd_id_descriptor *desc; 2151 int retval, len, idlen; 2152 uint16_t tag; 2153 2154 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2155 alias = dnvlist_get_string(req->args_nvl, "cfiscsi_target_alias", NULL); 2156 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2157 NULL); 2158 2159 if (target == NULL || val == NULL) { 2160 req->status = CTL_LUN_ERROR; 2161 snprintf(req->error_str, sizeof(req->error_str), 2162 "Missing required argument"); 2163 return; 2164 } 2165 2166 tag = strtoul(val, NULL, 0); 2167 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2168 if (ct == NULL) { 2169 req->status = CTL_LUN_ERROR; 2170 snprintf(req->error_str, sizeof(req->error_str), 2171 "failed to create target \"%s\"", target); 2172 return; 2173 } 2174 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2175 req->status = CTL_LUN_ERROR; 2176 snprintf(req->error_str, sizeof(req->error_str), 2177 "target \"%s\" for portal group tag %u already exists", 2178 target, tag); 2179 cfiscsi_target_release(ct); 2180 return; 2181 } 2182 port = &ct->ct_port; 2183 // WAT 2184 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2185 goto done; 2186 2187 port->frontend = &cfiscsi_frontend; 2188 port->port_type = CTL_PORT_ISCSI; 2189 /* XXX KDM what should the real number be here? */ 2190 port->num_requested_ctl_io = 4096; 2191 port->port_name = "iscsi"; 2192 port->physical_port = (int)tag; 2193 port->virtual_port = ct->ct_target_id; 2194 port->port_online = cfiscsi_online; 2195 port->port_offline = cfiscsi_offline; 2196 port->port_info = cfiscsi_info; 2197 port->onoff_arg = ct; 2198 port->fe_datamove = cfiscsi_datamove; 2199 port->fe_done = cfiscsi_done; 2200 port->targ_port = -1; 2201 port->options = nvlist_clone(req->args_nvl); 2202 2203 /* Generate Port ID. */ 2204 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2205 idlen = roundup2(idlen, 4); 2206 len = sizeof(struct scsi_vpd_device_id) + idlen; 2207 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2208 M_CTL, M_WAITOK | M_ZERO); 2209 port->port_devid->len = len; 2210 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2211 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2212 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2213 SVPD_ID_TYPE_SCSI_NAME; 2214 desc->length = idlen; 2215 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2216 2217 /* Generate Target ID. */ 2218 idlen = strlen(target) + 1; 2219 idlen = roundup2(idlen, 4); 2220 len = sizeof(struct scsi_vpd_device_id) + idlen; 2221 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2222 M_CTL, M_WAITOK | M_ZERO); 2223 port->target_devid->len = len; 2224 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2225 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2226 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2227 SVPD_ID_TYPE_SCSI_NAME; 2228 desc->length = idlen; 2229 strlcpy(desc->identifier, target, idlen); 2230 2231 retval = ctl_port_register(port); 2232 if (retval != 0) { 2233 free(port->port_devid, M_CFISCSI); 2234 free(port->target_devid, M_CFISCSI); 2235 cfiscsi_target_release(ct); 2236 req->status = CTL_LUN_ERROR; 2237 snprintf(req->error_str, sizeof(req->error_str), 2238 "ctl_port_register() failed with error %d", retval); 2239 return; 2240 } 2241 done: 2242 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2243 req->status = CTL_LUN_OK; 2244 req->result_nvl = nvlist_create(0); 2245 nvlist_add_number(req->result_nvl, "port_id", port->targ_port); 2246 } 2247 2248 static void 2249 cfiscsi_ioctl_port_remove(struct ctl_req *req) 2250 { 2251 struct cfiscsi_target *ct; 2252 const char *target, *val; 2253 uint16_t tag; 2254 2255 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2256 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2257 NULL); 2258 2259 if (target == NULL || val == NULL) { 2260 req->status = CTL_LUN_ERROR; 2261 snprintf(req->error_str, sizeof(req->error_str), 2262 "Missing required argument"); 2263 return; 2264 } 2265 2266 tag = strtoul(val, NULL, 0); 2267 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2268 if (ct == NULL) { 2269 req->status = CTL_LUN_ERROR; 2270 snprintf(req->error_str, sizeof(req->error_str), 2271 "can't find target \"%s\"", target); 2272 return; 2273 } 2274 2275 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2276 ctl_port_offline(&ct->ct_port); 2277 cfiscsi_target_release(ct); 2278 cfiscsi_target_release(ct); 2279 req->status = CTL_LUN_OK; 2280 } 2281 2282 static int 2283 cfiscsi_ioctl(struct cdev *dev, 2284 u_long cmd, caddr_t addr, int flag, struct thread *td) 2285 { 2286 struct ctl_iscsi *ci; 2287 struct ctl_req *req; 2288 2289 if (cmd == CTL_PORT_REQ) { 2290 req = (struct ctl_req *)addr; 2291 switch (req->reqtype) { 2292 case CTL_REQ_CREATE: 2293 cfiscsi_ioctl_port_create(req); 2294 break; 2295 case CTL_REQ_REMOVE: 2296 cfiscsi_ioctl_port_remove(req); 2297 break; 2298 default: 2299 req->status = CTL_LUN_ERROR; 2300 snprintf(req->error_str, sizeof(req->error_str), 2301 "Unsupported request type %d", req->reqtype); 2302 } 2303 return (0); 2304 } 2305 2306 if (cmd != CTL_ISCSI) 2307 return (ENOTTY); 2308 2309 ci = (struct ctl_iscsi *)addr; 2310 switch (ci->type) { 2311 case CTL_ISCSI_HANDOFF: 2312 cfiscsi_ioctl_handoff(ci); 2313 break; 2314 case CTL_ISCSI_LIST: 2315 cfiscsi_ioctl_list(ci); 2316 break; 2317 case CTL_ISCSI_LOGOUT: 2318 cfiscsi_ioctl_logout(ci); 2319 break; 2320 case CTL_ISCSI_TERMINATE: 2321 cfiscsi_ioctl_terminate(ci); 2322 break; 2323 case CTL_ISCSI_LIMITS: 2324 cfiscsi_ioctl_limits(ci); 2325 break; 2326 #ifdef ICL_KERNEL_PROXY 2327 case CTL_ISCSI_LISTEN: 2328 cfiscsi_ioctl_listen(ci); 2329 break; 2330 case CTL_ISCSI_ACCEPT: 2331 cfiscsi_ioctl_accept(ci); 2332 break; 2333 case CTL_ISCSI_SEND: 2334 cfiscsi_ioctl_send(ci); 2335 break; 2336 case CTL_ISCSI_RECEIVE: 2337 cfiscsi_ioctl_receive(ci); 2338 break; 2339 #else 2340 case CTL_ISCSI_LISTEN: 2341 case CTL_ISCSI_ACCEPT: 2342 case CTL_ISCSI_SEND: 2343 case CTL_ISCSI_RECEIVE: 2344 ci->status = CTL_ISCSI_ERROR; 2345 snprintf(ci->error_str, sizeof(ci->error_str), 2346 "%s: CTL compiled without ICL_KERNEL_PROXY", 2347 __func__); 2348 break; 2349 #endif /* !ICL_KERNEL_PROXY */ 2350 default: 2351 ci->status = CTL_ISCSI_ERROR; 2352 snprintf(ci->error_str, sizeof(ci->error_str), 2353 "%s: invalid iSCSI request type %d", __func__, ci->type); 2354 break; 2355 } 2356 2357 return (0); 2358 } 2359 2360 static void 2361 cfiscsi_target_hold(struct cfiscsi_target *ct) 2362 { 2363 2364 refcount_acquire(&ct->ct_refcount); 2365 } 2366 2367 static void 2368 cfiscsi_target_release(struct cfiscsi_target *ct) 2369 { 2370 struct cfiscsi_softc *softc; 2371 2372 softc = ct->ct_softc; 2373 mtx_lock(&softc->lock); 2374 if (refcount_release(&ct->ct_refcount)) { 2375 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2376 mtx_unlock(&softc->lock); 2377 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2378 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2379 if (ctl_port_deregister(&ct->ct_port) != 0) 2380 printf("%s: ctl_port_deregister() failed\n", 2381 __func__); 2382 } 2383 free(ct, M_CFISCSI); 2384 2385 return; 2386 } 2387 mtx_unlock(&softc->lock); 2388 } 2389 2390 static struct cfiscsi_target * 2391 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2392 { 2393 struct cfiscsi_target *ct; 2394 2395 mtx_lock(&softc->lock); 2396 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2397 if (ct->ct_tag != tag || 2398 strcmp(name, ct->ct_name) != 0 || 2399 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2400 continue; 2401 cfiscsi_target_hold(ct); 2402 mtx_unlock(&softc->lock); 2403 return (ct); 2404 } 2405 mtx_unlock(&softc->lock); 2406 2407 return (NULL); 2408 } 2409 2410 static struct cfiscsi_target * 2411 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2412 const char *alias, uint16_t tag) 2413 { 2414 struct cfiscsi_target *ct, *newct; 2415 2416 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2417 return (NULL); 2418 2419 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2420 2421 mtx_lock(&softc->lock); 2422 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2423 if (ct->ct_tag != tag || 2424 strcmp(name, ct->ct_name) != 0 || 2425 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2426 continue; 2427 cfiscsi_target_hold(ct); 2428 mtx_unlock(&softc->lock); 2429 free(newct, M_CFISCSI); 2430 return (ct); 2431 } 2432 2433 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2434 if (alias != NULL) 2435 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2436 newct->ct_tag = tag; 2437 refcount_init(&newct->ct_refcount, 1); 2438 newct->ct_softc = softc; 2439 if (TAILQ_EMPTY(&softc->targets)) 2440 softc->last_target_id = 0; 2441 newct->ct_target_id = ++softc->last_target_id; 2442 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2443 mtx_unlock(&softc->lock); 2444 2445 return (newct); 2446 } 2447 2448 static void 2449 cfiscsi_pdu_done(struct icl_pdu *ip, int error) 2450 { 2451 2452 if (error != 0) 2453 ; // XXX: Do something on error? 2454 ((ctl_ref)ip->ip_prv0)(ip->ip_prv1, -1); 2455 } 2456 2457 static void 2458 cfiscsi_datamove_in(union ctl_io *io) 2459 { 2460 struct cfiscsi_session *cs; 2461 struct icl_pdu *request, *response; 2462 const struct iscsi_bhs_scsi_command *bhssc; 2463 struct iscsi_bhs_data_in *bhsdi; 2464 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2465 size_t len, expected_len, sg_len, buffer_offset; 2466 size_t max_send_data_segment_length; 2467 const char *sg_addr; 2468 icl_pdu_cb cb; 2469 int ctl_sg_count, error, i; 2470 2471 request = PRIV_REQUEST(io); 2472 cs = PDU_SESSION(request); 2473 2474 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2475 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2476 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2477 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2478 2479 if (io->scsiio.kern_sg_entries > 0) { 2480 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2481 ctl_sg_count = io->scsiio.kern_sg_entries; 2482 } else { 2483 ctl_sglist = &ctl_sg_entry; 2484 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2485 ctl_sglist->len = io->scsiio.kern_data_len; 2486 ctl_sg_count = 1; 2487 } 2488 2489 /* 2490 * This is the offset within the current SCSI command; for the first 2491 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2492 * it will be the sum of lengths of previous ones. 2493 */ 2494 buffer_offset = io->scsiio.kern_rel_offset; 2495 2496 /* 2497 * This is the transfer length expected by the initiator. It can be 2498 * different from the amount of data from the SCSI point of view. 2499 */ 2500 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2501 2502 /* 2503 * If the transfer is outside of expected length -- we are done. 2504 */ 2505 if (buffer_offset >= expected_len) { 2506 #if 0 2507 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2508 "already sent the expected len", buffer_offset); 2509 #endif 2510 ctl_datamove_done(io, true); 2511 return; 2512 } 2513 2514 if (io->scsiio.kern_data_ref != NULL) 2515 cb = cfiscsi_pdu_done; 2516 else 2517 cb = NULL; 2518 2519 i = 0; 2520 sg_addr = NULL; 2521 sg_len = 0; 2522 response = NULL; 2523 bhsdi = NULL; 2524 if (cs->cs_conn->ic_hw_isomax != 0) 2525 max_send_data_segment_length = cs->cs_conn->ic_hw_isomax; 2526 else 2527 max_send_data_segment_length = 2528 cs->cs_conn->ic_max_send_data_segment_length; 2529 for (;;) { 2530 if (response == NULL) { 2531 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2532 if (response == NULL) { 2533 CFISCSI_SESSION_WARN(cs, "failed to " 2534 "allocate memory; dropping connection"); 2535 ctl_set_busy(&io->scsiio); 2536 ctl_datamove_done(io, true); 2537 cfiscsi_session_terminate(cs); 2538 return; 2539 } 2540 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2541 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2542 bhsdi->bhsdi_initiator_task_tag = 2543 bhssc->bhssc_initiator_task_tag; 2544 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2545 bhsdi->bhsdi_datasn = htonl(PRIV_EXPDATASN(io)); 2546 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2547 } 2548 2549 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2550 if (sg_len == 0) { 2551 sg_addr = ctl_sglist[i].addr; 2552 sg_len = ctl_sglist[i].len; 2553 KASSERT(sg_len > 0, ("sg_len <= 0")); 2554 } 2555 2556 len = sg_len; 2557 2558 /* 2559 * Truncate to maximum data segment length. 2560 */ 2561 KASSERT(response->ip_data_len < max_send_data_segment_length, 2562 ("ip_data_len %zd >= max_send_data_segment_length %zd", 2563 response->ip_data_len, max_send_data_segment_length)); 2564 if (response->ip_data_len + len > max_send_data_segment_length) { 2565 len = max_send_data_segment_length - response->ip_data_len; 2566 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2567 len, sg_len)); 2568 } 2569 2570 /* 2571 * Truncate to expected data transfer length. 2572 */ 2573 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2574 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2575 buffer_offset, response->ip_data_len, expected_len)); 2576 if (buffer_offset + response->ip_data_len + len > expected_len) { 2577 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2578 "to expected data transfer length %zd", 2579 buffer_offset + response->ip_data_len + len, expected_len); 2580 len = expected_len - (buffer_offset + response->ip_data_len); 2581 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2582 len, sg_len)); 2583 } 2584 2585 error = icl_pdu_append_data(response, sg_addr, len, 2586 M_NOWAIT | (cb ? ICL_NOCOPY : 0)); 2587 if (error != 0) { 2588 CFISCSI_SESSION_WARN(cs, "failed to " 2589 "allocate memory; dropping connection"); 2590 icl_pdu_free(response); 2591 ctl_set_busy(&io->scsiio); 2592 ctl_datamove_done(io, true); 2593 cfiscsi_session_terminate(cs); 2594 return; 2595 } 2596 sg_addr += len; 2597 sg_len -= len; 2598 io->scsiio.kern_data_resid -= len; 2599 2600 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2601 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2602 buffer_offset, response->ip_data_len, expected_len)); 2603 if (buffer_offset + response->ip_data_len == expected_len) { 2604 /* 2605 * Already have the amount of data the initiator wanted. 2606 */ 2607 break; 2608 } 2609 2610 if (sg_len == 0) { 2611 /* 2612 * End of scatter-gather segment; 2613 * proceed to the next one... 2614 */ 2615 if (i == ctl_sg_count - 1) { 2616 /* 2617 * ... unless this was the last one. 2618 */ 2619 break; 2620 } 2621 i++; 2622 } 2623 2624 if (response->ip_data_len == max_send_data_segment_length) { 2625 /* 2626 * Can't stuff more data into the current PDU; 2627 * queue it. Note that's not enough to check 2628 * for kern_data_resid == 0 instead; there 2629 * may be several Data-In PDUs for the final 2630 * call to cfiscsi_datamove(), and we want 2631 * to set the F flag only on the last of them. 2632 */ 2633 buffer_offset += response->ip_data_len; 2634 if (buffer_offset == io->scsiio.kern_total_len || 2635 buffer_offset == expected_len) { 2636 buffer_offset -= response->ip_data_len; 2637 break; 2638 } 2639 PRIV_EXPDATASN(io) += howmany(response->ip_data_len, 2640 cs->cs_conn->ic_max_send_data_segment_length); 2641 if (cb != NULL) { 2642 response->ip_prv0 = io->scsiio.kern_data_ref; 2643 response->ip_prv1 = io->scsiio.kern_data_arg; 2644 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2645 } 2646 cfiscsi_pdu_queue_cb(response, cb); 2647 response = NULL; 2648 bhsdi = NULL; 2649 } 2650 } 2651 if (response != NULL) { 2652 buffer_offset += response->ip_data_len; 2653 if (buffer_offset == io->scsiio.kern_total_len || 2654 buffer_offset == expected_len) { 2655 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2656 if (io->io_hdr.status == CTL_SUCCESS) { 2657 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2658 if (io->scsiio.kern_total_len < 2659 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2660 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2661 bhsdi->bhsdi_residual_count = 2662 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2663 io->scsiio.kern_total_len); 2664 } else if (io->scsiio.kern_total_len > 2665 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2666 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2667 bhsdi->bhsdi_residual_count = 2668 htonl(io->scsiio.kern_total_len - 2669 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2670 } 2671 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2672 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2673 } 2674 } 2675 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2676 PRIV_EXPDATASN(io) += howmany(response->ip_data_len, 2677 cs->cs_conn->ic_max_send_data_segment_length); 2678 if (cb != NULL) { 2679 response->ip_prv0 = io->scsiio.kern_data_ref; 2680 response->ip_prv1 = io->scsiio.kern_data_arg; 2681 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2682 } 2683 cfiscsi_pdu_queue_cb(response, cb); 2684 } 2685 2686 ctl_datamove_done(io, true); 2687 } 2688 2689 static void 2690 cfiscsi_datamove_out(union ctl_io *io) 2691 { 2692 struct cfiscsi_session *cs; 2693 struct icl_pdu *request, *response; 2694 const struct iscsi_bhs_scsi_command *bhssc; 2695 struct iscsi_bhs_r2t *bhsr2t; 2696 struct cfiscsi_data_wait *cdw; 2697 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2698 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2699 uint32_t target_transfer_tag; 2700 bool done; 2701 2702 request = PRIV_REQUEST(io); 2703 cs = PDU_SESSION(request); 2704 2705 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2706 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2707 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2708 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2709 2710 /* 2711 * Complete write underflow. Not a single byte to read. Return. 2712 */ 2713 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2714 if (io->scsiio.kern_rel_offset >= expected_len) { 2715 ctl_datamove_done(io, true); 2716 return; 2717 } 2718 2719 datamove_len = MIN(io->scsiio.kern_data_len, 2720 expected_len - io->scsiio.kern_rel_offset); 2721 2722 target_transfer_tag = 2723 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2724 if (target_transfer_tag == 0xffffffff) { 2725 target_transfer_tag = 2726 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2727 } 2728 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2729 &target_transfer_tag); 2730 if (cdw == NULL) { 2731 CFISCSI_SESSION_WARN(cs, "failed to " 2732 "allocate memory; dropping connection"); 2733 ctl_set_busy(&io->scsiio); 2734 ctl_datamove_done(io, true); 2735 cfiscsi_session_terminate(cs); 2736 return; 2737 } 2738 #if 0 2739 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2740 "task tag 0x%x, target transfer tag 0x%x", 2741 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2742 #endif 2743 2744 cdw->cdw_ctl_io = io; 2745 cdw->cdw_target_transfer_tag = target_transfer_tag; 2746 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2747 cdw->cdw_r2t_end = datamove_len; 2748 cdw->cdw_datasn = 0; 2749 2750 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2751 if (io->scsiio.kern_sg_entries > 0) { 2752 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2753 } else { 2754 ctl_sglist = &ctl_sg_entry; 2755 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2756 ctl_sglist->len = datamove_len; 2757 } 2758 cdw->cdw_sg_index = 0; 2759 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2760 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2761 r2t_off = io->scsiio.ext_data_filled; 2762 while (r2t_off > 0) { 2763 if (r2t_off >= cdw->cdw_sg_len) { 2764 r2t_off -= cdw->cdw_sg_len; 2765 cdw->cdw_sg_index++; 2766 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2767 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2768 continue; 2769 } 2770 cdw->cdw_sg_addr += r2t_off; 2771 cdw->cdw_sg_len -= r2t_off; 2772 r2t_off = 0; 2773 } 2774 2775 if (cs->cs_immediate_data && 2776 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2777 icl_pdu_data_segment_length(request)) { 2778 done = cfiscsi_handle_data_segment(request, cdw); 2779 if (done) { 2780 cfiscsi_data_wait_free(cs, cdw); 2781 ctl_datamove_done(io, true); 2782 return; 2783 } 2784 } 2785 2786 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2787 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2788 cs->cs_max_burst_length); 2789 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2790 2791 CFISCSI_SESSION_LOCK(cs); 2792 if (cs->cs_terminating_tasks) { 2793 CFISCSI_SESSION_UNLOCK(cs); 2794 KASSERT((io->io_hdr.flags & CTL_FLAG_ABORT) != 0, 2795 ("%s: I/O request %p on termating session %p not aborted", 2796 __func__, io, cs)); 2797 CFISCSI_SESSION_WARN(cs, "aborting data_wait for aborted I/O"); 2798 cfiscsi_data_wait_abort(cs, cdw, 44); 2799 return; 2800 } 2801 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2802 CFISCSI_SESSION_UNLOCK(cs); 2803 2804 /* 2805 * XXX: We should limit the number of outstanding R2T PDUs 2806 * per task to MaxOutstandingR2T. 2807 */ 2808 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2809 if (response == NULL) { 2810 CFISCSI_SESSION_WARN(cs, "failed to " 2811 "allocate memory; dropping connection"); 2812 ctl_set_busy(&io->scsiio); 2813 ctl_datamove_done(io, true); 2814 cfiscsi_session_terminate(cs); 2815 return; 2816 } 2817 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2818 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2819 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2820 bhsr2t->bhsr2t_flags = 0x80; 2821 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2822 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2823 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2824 /* 2825 * XXX: Here we assume that cfiscsi_datamove() won't ever 2826 * be running concurrently on several CPUs for a given 2827 * command. 2828 */ 2829 bhsr2t->bhsr2t_r2tsn = htonl(PRIV_R2TSN(io)++); 2830 /* 2831 * This is the offset within the current SCSI command; 2832 * i.e. for the first call of datamove(), it will be 0, 2833 * and for subsequent ones it will be the sum of lengths 2834 * of previous ones. 2835 * 2836 * The ext_data_filled is to account for unsolicited 2837 * (immediate) data that might have already arrived. 2838 */ 2839 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2840 /* 2841 * This is the total length (sum of S/G lengths) this call 2842 * to cfiscsi_datamove() is supposed to handle, limited by 2843 * MaxBurstLength. 2844 */ 2845 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2846 cfiscsi_pdu_queue(response); 2847 } 2848 2849 static void 2850 cfiscsi_datamove(union ctl_io *io) 2851 { 2852 2853 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2854 cfiscsi_datamove_in(io); 2855 else { 2856 /* We hadn't received anything during this datamove yet. */ 2857 io->scsiio.ext_data_filled = 0; 2858 cfiscsi_datamove_out(io); 2859 } 2860 } 2861 2862 static void 2863 cfiscsi_scsi_command_done(union ctl_io *io) 2864 { 2865 struct icl_pdu *request, *response; 2866 struct iscsi_bhs_scsi_command *bhssc; 2867 struct iscsi_bhs_scsi_response *bhssr; 2868 #ifdef DIAGNOSTIC 2869 struct cfiscsi_data_wait *cdw; 2870 struct cfiscsi_session *cs; 2871 #endif 2872 uint16_t sense_length; 2873 2874 request = PRIV_REQUEST(io); 2875 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2876 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2877 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2878 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2879 2880 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2881 // bhssc->bhssc_initiator_task_tag); 2882 2883 #ifdef DIAGNOSTIC 2884 cs = PDU_SESSION(request); 2885 CFISCSI_SESSION_LOCK(cs); 2886 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2887 KASSERT(bhssc->bhssc_initiator_task_tag != 2888 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2889 CFISCSI_SESSION_UNLOCK(cs); 2890 #endif 2891 2892 /* 2893 * Do not return status for aborted commands. 2894 * There are exceptions, but none supported by CTL yet. 2895 */ 2896 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2897 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2898 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2899 ctl_free_io(io); 2900 icl_pdu_free(request); 2901 return; 2902 } 2903 2904 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2905 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2906 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2907 bhssr->bhssr_flags = 0x80; 2908 /* 2909 * XXX: We don't deal with bidirectional under/overflows; 2910 * does anything actually support those? 2911 */ 2912 if (io->scsiio.kern_total_len < 2913 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2914 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2915 bhssr->bhssr_residual_count = 2916 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2917 io->scsiio.kern_total_len); 2918 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2919 // ntohl(bhssr->bhssr_residual_count)); 2920 } else if (io->scsiio.kern_total_len > 2921 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2922 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2923 bhssr->bhssr_residual_count = htonl(io->scsiio.kern_total_len - 2924 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2925 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2926 // ntohl(bhssr->bhssr_residual_count)); 2927 } 2928 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2929 bhssr->bhssr_status = io->scsiio.scsi_status; 2930 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2931 bhssr->bhssr_expdatasn = htonl(PRIV_EXPDATASN(io)); 2932 2933 if (io->scsiio.sense_len > 0) { 2934 #if 0 2935 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2936 io->scsiio.sense_len); 2937 #endif 2938 sense_length = htons(io->scsiio.sense_len); 2939 icl_pdu_append_data(response, 2940 &sense_length, sizeof(sense_length), M_WAITOK); 2941 icl_pdu_append_data(response, 2942 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2943 } 2944 2945 ctl_free_io(io); 2946 icl_pdu_free(request); 2947 cfiscsi_pdu_queue(response); 2948 } 2949 2950 static void 2951 cfiscsi_task_management_done(union ctl_io *io) 2952 { 2953 struct icl_pdu *request, *response; 2954 struct iscsi_bhs_task_management_request *bhstmr; 2955 struct iscsi_bhs_task_management_response *bhstmr2; 2956 struct cfiscsi_data_wait *cdw, *tmpcdw; 2957 struct cfiscsi_session *cs, *tcs; 2958 struct cfiscsi_softc *softc; 2959 int cold_reset = 0; 2960 2961 request = PRIV_REQUEST(io); 2962 cs = PDU_SESSION(request); 2963 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2964 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2965 ISCSI_BHS_OPCODE_TASK_REQUEST, 2966 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2967 2968 #if 0 2969 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2970 bhstmr->bhstmr_initiator_task_tag, 2971 bhstmr->bhstmr_referenced_task_tag); 2972 #endif 2973 2974 if ((bhstmr->bhstmr_function & ~0x80) == 2975 BHSTMR_FUNCTION_ABORT_TASK) { 2976 /* 2977 * Make sure we no longer wait for Data-Out for this command. 2978 */ 2979 CFISCSI_SESSION_LOCK(cs); 2980 TAILQ_FOREACH_SAFE(cdw, 2981 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2982 if (bhstmr->bhstmr_referenced_task_tag != 2983 cdw->cdw_initiator_task_tag) 2984 continue; 2985 2986 #if 0 2987 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2988 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2989 #endif 2990 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2991 cdw, cdw_next); 2992 cfiscsi_data_wait_abort(cs, cdw, 43); 2993 } 2994 CFISCSI_SESSION_UNLOCK(cs); 2995 } 2996 if ((bhstmr->bhstmr_function & ~0x80) == 2997 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2998 io->io_hdr.status == CTL_SUCCESS) 2999 cold_reset = 1; 3000 3001 response = cfiscsi_pdu_new_response(request, M_WAITOK); 3002 bhstmr2 = (struct iscsi_bhs_task_management_response *) 3003 response->ip_bhs; 3004 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 3005 bhstmr2->bhstmr_flags = 0x80; 3006 switch (io->taskio.task_status) { 3007 case CTL_TASK_FUNCTION_COMPLETE: 3008 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 3009 break; 3010 case CTL_TASK_FUNCTION_SUCCEEDED: 3011 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 3012 break; 3013 case CTL_TASK_LUN_DOES_NOT_EXIST: 3014 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 3015 break; 3016 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 3017 default: 3018 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 3019 break; 3020 } 3021 memcpy(bhstmr2->bhstmr_additional_reponse_information, 3022 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 3023 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 3024 3025 ctl_free_io(io); 3026 icl_pdu_free(request); 3027 cfiscsi_pdu_queue(response); 3028 3029 if (cold_reset) { 3030 softc = cs->cs_target->ct_softc; 3031 mtx_lock(&softc->lock); 3032 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 3033 if (tcs->cs_target == cs->cs_target) 3034 cfiscsi_session_terminate(tcs); 3035 } 3036 mtx_unlock(&softc->lock); 3037 } 3038 } 3039 3040 static void 3041 cfiscsi_done(union ctl_io *io) 3042 { 3043 struct icl_pdu *request; 3044 struct cfiscsi_session *cs; 3045 3046 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 3047 ("invalid CTL status %#x", io->io_hdr.status)); 3048 3049 request = PRIV_REQUEST(io); 3050 cs = PDU_SESSION(request); 3051 3052 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 3053 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 3054 cfiscsi_scsi_command_done(io); 3055 break; 3056 case ISCSI_BHS_OPCODE_TASK_REQUEST: 3057 cfiscsi_task_management_done(io); 3058 break; 3059 case ISCSI_BHS_OPCODE_INTERNAL: 3060 /* 3061 * Implicit task termination has just completed; nothing to do. 3062 */ 3063 icl_pdu_free(request); 3064 cs->cs_tasks_aborted = true; 3065 refcount_release(&cs->cs_outstanding_ctl_pdus); 3066 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 3067 ctl_free_io(io); 3068 return; 3069 default: 3070 panic("cfiscsi_done called with wrong opcode 0x%x", 3071 request->ip_bhs->bhs_opcode); 3072 } 3073 3074 refcount_release(&cs->cs_outstanding_ctl_pdus); 3075 } 3076