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