sys/cam/ctl/ctl_frontend_iscsi.c

   1 /*-
   2  * Copyright (c) 2012 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Edward Tomasz Napierala under sponsorship
   6  * from the FreeBSD Foundation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD$
  30  */
  31
  32 /*
  33  * CTL frontend for the iSCSI protocol.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 __FBSDID("$FreeBSD$");
  38
  39 #include <sys/param.h>
  40 #include <sys/capability.h>
  41 #include <sys/condvar.h>
  42 #include <sys/file.h>
  43 #include <sys/kernel.h>
  44 #include <sys/kthread.h>
  45 #include <sys/lock.h>
  46 #include <sys/malloc.h>
  47 #include <sys/module.h>
  48 #include <sys/mutex.h>
  49 #include <sys/queue.h>
  50 #include <sys/sbuf.h>
  51 #include <sys/sysctl.h>
  52 #include <sys/systm.h>
  53 #include <sys/uio.h>
  54 #include <sys/unistd.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_frontend_internal.h>
  65 #include <cam/ctl/ctl_debug.h>
  66 #include <cam/ctl/ctl_ha.h>
  67 #include <cam/ctl/ctl_ioctl.h>
  68 #include <cam/ctl/ctl_private.h>
  69
  70 #include "../../dev/iscsi/icl.h"
  71 #include "../../dev/iscsi/iscsi_proto.h"
  72 #include "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 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend");
  83 static uma_zone_t cfiscsi_data_wait_zone;
  84
  85 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0,
  86     "CAM Target Layer iSCSI Frontend");
  87 static int debug = 3;
  88 TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug);
  89 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN,
  90     &debug, 1, "Enable debug messages");
  91 static int ping_timeout = 5;
  92 TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout);
  93 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN,
  94     &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds");
  95 static int login_timeout = 60;
  96 TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout);
  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 maxcmdsn_delta = 256;
 100 TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta);
 101 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN,
 102     &maxcmdsn_delta, 256, "Number of commands the initiator can send "
 103     "without confirmation");
 104
 105 #define CFISCSI_DEBUG(X, ...)                                           \
 106         do {                                                            \
 107                 if (debug > 1) {                                        \
 108                         printf("%s: " X "\n",                           \
 109                             __func__, ## __VA_ARGS__);                  \
 110                 }                                                       \
 111         } while (0)
 112
 113 #define CFISCSI_WARN(X, ...)                                            \
 114         do {                                                            \
 115                 if (debug > 0) {                                        \
 116                         printf("WARNING: %s: " X "\n",                  \
 117                             __func__, ## __VA_ARGS__);                  \
 118                 }                                                       \
 119         } while (0)
 120
 121 #define CFISCSI_SESSION_DEBUG(S, X, ...)                                \
 122         do {                                                            \
 123                 if (debug > 1) {                                        \
 124                         printf("%s: %s (%s): " X "\n",                  \
 125                             __func__, S->cs_initiator_addr,             \
 126                             S->cs_initiator_name, ## __VA_ARGS__);      \
 127                 }                                                       \
 128         } while (0)
 129
 130 #define CFISCSI_SESSION_WARN(S, X, ...)                                 \
 131         do  {                                                           \
 132                 if (debug > 0) {                                        \
 133                         printf("WARNING: %s (%s): " X "\n",             \
 134                             S->cs_initiator_addr,                       \
 135                             S->cs_initiator_name, ## __VA_ARGS__);      \
 136                 }                                                       \
 137         } while (0)
 138
 139 #define CFISCSI_SESSION_LOCK(X)         mtx_lock(&X->cs_lock)
 140 #define CFISCSI_SESSION_UNLOCK(X)       mtx_unlock(&X->cs_lock)
 141 #define CFISCSI_SESSION_LOCK_ASSERT(X)  mtx_assert(&X->cs_lock, MA_OWNED)
 142
 143 #define CONN_SESSION(X)                 ((struct cfiscsi_session *)(X)->ic_prv0)
 144 #define PDU_SESSION(X)                  CONN_SESSION((X)->ip_conn)
 145 #define PDU_EXPDATASN(X)                (X)->ip_prv0
 146 #define PDU_TOTAL_TRANSFER_LEN(X)       (X)->ip_prv1
 147 #define PDU_R2TSN(X)                    (X)->ip_prv2
 148
 149 int             cfiscsi_init(void);
 150 static void     cfiscsi_online(void *arg);
 151 static void     cfiscsi_offline(void *arg);
 152 static int      cfiscsi_info(void *arg, struct sbuf *sb);
 153 static int      cfiscsi_lun_enable(void *arg,
 154                     struct ctl_id target_id, int lun_id);
 155 static int      cfiscsi_lun_disable(void *arg,
 156                     struct ctl_id target_id, int lun_id);
 157 static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun);
 158 static int      cfiscsi_ioctl(struct cdev *dev,
 159                     u_long cmd, caddr_t addr, int flag, struct thread *td);
 160 static void     cfiscsi_datamove(union ctl_io *io);
 161 static void     cfiscsi_done(union ctl_io *io);
 162 static bool     cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request);
 163 static void     cfiscsi_pdu_handle_nop_out(struct icl_pdu *request);
 164 static void     cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request);
 165 static void     cfiscsi_pdu_handle_task_request(struct icl_pdu *request);
 166 static void     cfiscsi_pdu_handle_data_out(struct icl_pdu *request);
 167 static void     cfiscsi_pdu_handle_logout_request(struct icl_pdu *request);
 168 static void     cfiscsi_session_terminate(struct cfiscsi_session *cs);
 169 static struct cfiscsi_target    *cfiscsi_target_find(struct cfiscsi_softc
 170                     *softc, const char *name);
 171 static struct cfiscsi_target    *cfiscsi_target_find_or_create(
 172     struct cfiscsi_softc *softc, const char *name, const char *alias);
 173 static void     cfiscsi_target_release(struct cfiscsi_target *ct);
 174 static void     cfiscsi_session_delete(struct cfiscsi_session *cs);
 175
 176 static struct cfiscsi_softc cfiscsi_softc;
 177 extern struct ctl_softc *control_softc;
 178
 179 static struct ctl_frontend cfiscsi_frontend =
 180 {
 181         .name = "iscsi",
 182         .init = cfiscsi_init,
 183         .ioctl = cfiscsi_ioctl,
 184 };
 185 CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend);
 186 MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1);
 187
 188 static struct icl_pdu *
 189 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags)
 190 {
 191
 192         return (icl_pdu_new_bhs(request->ip_conn, flags));
 193 }
 194
 195 static bool
 196 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request)
 197 {
 198         const struct iscsi_bhs_scsi_command *bhssc;
 199         struct cfiscsi_session *cs;
 200         uint32_t cmdsn, expstatsn;
 201
 202         cs = PDU_SESSION(request);
 203
 204         /*
 205          * Every incoming PDU - not just NOP-Out - resets the ping timer.
 206          * The purpose of the timeout is to reset the connection when it stalls;
 207          * we don't want this to happen when NOP-In or NOP-Out ends up delayed
 208          * in some queue.
 209          *
 210          * XXX: Locking?
 211          */
 212         cs->cs_timeout = 0;
 213
 214         /*
 215          * Data-Out PDUs don't contain CmdSN.
 216          */
 217         if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 218             ISCSI_BHS_OPCODE_SCSI_DATA_OUT)
 219                 return (false);
 220
 221         /*
 222          * We're only using fields common for all the request
 223          * (initiator -> target) PDUs.
 224          */
 225         bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs;
 226         cmdsn = ntohl(bhssc->bhssc_cmdsn);
 227         expstatsn = ntohl(bhssc->bhssc_expstatsn);
 228
 229         CFISCSI_SESSION_LOCK(cs);
 230 #if 0
 231         if (expstatsn != cs->cs_statsn) {
 232                 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, "
 233                     "while current StatSN is %d", expstatsn,
 234                     cs->cs_statsn);
 235         }
 236 #endif
 237
 238         /*
 239          * The target MUST silently ignore any non-immediate command outside
 240          * of this range.
 241          */
 242         if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) {
 243                 CFISCSI_SESSION_UNLOCK(cs);
 244                 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, "
 245                     "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn);
 246                 return (true);
 247         }
 248
 249         if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0)
 250                 cs->cs_cmdsn++;
 251
 252         CFISCSI_SESSION_UNLOCK(cs);
 253
 254         return (false);
 255 }
 256
 257 static void
 258 cfiscsi_pdu_handle(struct icl_pdu *request)
 259 {
 260         struct cfiscsi_session *cs;
 261         bool ignore;
 262
 263         cs = PDU_SESSION(request);
 264
 265         ignore = cfiscsi_pdu_update_cmdsn(request);
 266         if (ignore) {
 267                 icl_pdu_free(request);
 268                 return;
 269         }
 270
 271         /*
 272          * Handle the PDU; this includes e.g. receiving the remaining
 273          * part of PDU and submitting the SCSI command to CTL
 274          * or queueing a reply.  The handling routine is responsible
 275          * for freeing the PDU when it's no longer needed.
 276          */
 277         switch (request->ip_bhs->bhs_opcode &
 278             ~ISCSI_BHS_OPCODE_IMMEDIATE) {
 279         case ISCSI_BHS_OPCODE_NOP_OUT:
 280                 cfiscsi_pdu_handle_nop_out(request);
 281                 break;
 282         case ISCSI_BHS_OPCODE_SCSI_COMMAND:
 283                 cfiscsi_pdu_handle_scsi_command(request);
 284                 break;
 285         case ISCSI_BHS_OPCODE_TASK_REQUEST:
 286                 cfiscsi_pdu_handle_task_request(request);
 287                 break;
 288         case ISCSI_BHS_OPCODE_SCSI_DATA_OUT:
 289                 cfiscsi_pdu_handle_data_out(request);
 290                 break;
 291         case ISCSI_BHS_OPCODE_LOGOUT_REQUEST:
 292                 cfiscsi_pdu_handle_logout_request(request);
 293                 break;
 294         default:
 295                 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported "
 296                     "opcode 0x%x; dropping connection",
 297                     request->ip_bhs->bhs_opcode);
 298                 icl_pdu_free(request);
 299                 cfiscsi_session_terminate(cs);
 300         }
 301
 302 }
 303
 304 static void
 305 cfiscsi_receive_callback(struct icl_pdu *request)
 306 {
 307         struct cfiscsi_session *cs;
 308
 309         cs = PDU_SESSION(request);
 310
 311 #ifdef ICL_KERNEL_PROXY
 312         if (cs->cs_waiting_for_ctld || cs->cs_login_phase) {
 313                 if (cs->cs_login_pdu == NULL)
 314                         cs->cs_login_pdu = request;
 315                 else
 316                         icl_pdu_free(request);
 317                 cv_signal(&cs->cs_login_cv);
 318                 return;
 319         }
 320 #endif
 321
 322         cfiscsi_pdu_handle(request);
 323 }
 324
 325 static void
 326 cfiscsi_error_callback(struct icl_conn *ic)
 327 {
 328         struct cfiscsi_session *cs;
 329
 330         cs = CONN_SESSION(ic);
 331
 332         CFISCSI_SESSION_WARN(cs, "connection error; dropping connection");
 333         cfiscsi_session_terminate(cs);
 334 }
 335
 336 static int
 337 cfiscsi_pdu_prepare(struct icl_pdu *response)
 338 {
 339         struct cfiscsi_session *cs;
 340         struct iscsi_bhs_scsi_response *bhssr;
 341         bool advance_statsn = true;
 342
 343         cs = PDU_SESSION(response);
 344
 345         CFISCSI_SESSION_LOCK_ASSERT(cs);
 346
 347         /*
 348          * We're only using fields common for all the response
 349          * (target -> initiator) PDUs.
 350          */
 351         bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs;
 352
 353         /*
 354          * 10.8.3: "The StatSN for this connection is not advanced
 355          * after this PDU is sent."
 356          */
 357         if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T)
 358                 advance_statsn = false;
 359
 360         /*
 361          * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff,
 362          * StatSN for the connection is not advanced after this PDU is sent."
 363          */
 364         if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN &&
 365             bhssr->bhssr_initiator_task_tag == 0xffffffff)
 366                 advance_statsn = false;
 367
 368         /*
 369          * See the comment below - StatSN is not meaningful and must
 370          * not be advanced.
 371          */
 372         if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN)
 373                 advance_statsn = false;
 374
 375         /*
 376          * 10.7.3: "The fields StatSN, Status, and Residual Count
 377          * only have meaningful content if the S bit is set to 1."
 378          */
 379         if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN)
 380                 bhssr->bhssr_statsn = htonl(cs->cs_statsn);
 381         bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn);
 382         bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta);
 383
 384         if (advance_statsn)
 385                 cs->cs_statsn++;
 386
 387         return (0);
 388 }
 389
 390 static void
 391 cfiscsi_pdu_queue(struct icl_pdu *response)
 392 {
 393         struct cfiscsi_session *cs;
 394
 395         cs = PDU_SESSION(response);
 396
 397         CFISCSI_SESSION_LOCK(cs);
 398         cfiscsi_pdu_prepare(response);
 399         icl_pdu_queue(response);
 400         CFISCSI_SESSION_UNLOCK(cs);
 401 }
 402
 403 static uint32_t
 404 cfiscsi_decode_lun(uint64_t encoded)
 405 {
 406         uint8_t lun[8];
 407         uint32_t result;
 408
 409         /*
 410          * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number,
 411          * but is in fact an evil, multidimensional structure defined
 412          * in SCSI Architecture Model 5 (SAM-5), section 4.6.
 413          */
 414         memcpy(lun, &encoded, sizeof(lun));
 415         switch (lun[0] & 0xC0) {
 416         case 0x00:
 417                 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 ||
 418                     lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) {
 419                         CFISCSI_WARN("malformed LUN "
 420                             "(peripheral device addressing method): 0x%jx",
 421                             (uintmax_t)encoded);
 422                         result = 0xffffffff;
 423                         break;
 424                 }
 425                 result = lun[1];
 426                 break;
 427         case 0x40:
 428                 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 ||
 429                     lun[6] != 0 || lun[7] != 0) {
 430                         CFISCSI_WARN("malformed LUN "
 431                             "(flat address space addressing method): 0x%jx",
 432                             (uintmax_t)encoded);
 433                         result = 0xffffffff;
 434                         break;
 435                 }
 436                 result = ((lun[0] & 0x3f) << 8) + lun[1];
 437                 break;
 438         case 0xC0:
 439                 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 ||
 440                     lun[6] != 0 || lun[7] != 0) {
 441                         CFISCSI_WARN("malformed LUN (extended flat "
 442                             "address space addressing method): 0x%jx",
 443                             (uintmax_t)encoded);
 444                         result = 0xffffffff;
 445                         break;
 446                 }
 447                 result = (lun[1] << 16) + (lun[2] << 8) + lun[3];
 448         default:
 449                 CFISCSI_WARN("unsupported LUN format 0x%jx",
 450                     (uintmax_t)encoded);
 451                 result = 0xffffffff;
 452                 break;
 453         }
 454
 455         return (result);
 456 }
 457
 458 static void
 459 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request)
 460 {
 461         struct cfiscsi_session *cs;
 462         struct iscsi_bhs_nop_out *bhsno;
 463         struct iscsi_bhs_nop_in *bhsni;
 464         struct icl_pdu *response;
 465         void *data = NULL;
 466         size_t datasize;
 467         int error;
 468
 469         cs = PDU_SESSION(request);
 470         bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs;
 471
 472         if (bhsno->bhsno_initiator_task_tag == 0xffffffff) {
 473                 /*
 474                  * Nothing to do, iscsi_pdu_update_statsn() already
 475                  * zeroed the timeout.
 476                  */
 477                 icl_pdu_free(request);
 478                 return;
 479         }
 480
 481         datasize = icl_pdu_data_segment_length(request);
 482         if (datasize > 0) {
 483                 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO);
 484                 if (data == NULL) {
 485                         CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
 486                             "dropping connection");
 487                         icl_pdu_free(request);
 488                         cfiscsi_session_terminate(cs);
 489                         return;
 490                 }
 491                 icl_pdu_get_data(request, 0, data, datasize);
 492         }
 493
 494         response = cfiscsi_pdu_new_response(request, M_NOWAIT);
 495         if (response == NULL) {
 496                 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
 497                     "droppping connection");
 498                 free(data, M_CFISCSI);
 499                 icl_pdu_free(request);
 500                 cfiscsi_session_terminate(cs);
 501                 return;
 502         }
 503         bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs;
 504         bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN;
 505         bhsni->bhsni_flags = 0x80;
 506         bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag;
 507         bhsni->bhsni_target_transfer_tag = 0xffffffff;
 508         if (datasize > 0) {
 509                 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT);
 510                 if (error != 0) {
 511                         CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
 512                             "dropping connection");
 513                         free(data, M_CFISCSI);
 514                         icl_pdu_free(request);
 515                         icl_pdu_free(response);
 516                         cfiscsi_session_terminate(cs);
 517                         return;
 518                 }
 519                 free(data, M_CFISCSI);
 520         }
 521
 522         icl_pdu_free(request);
 523         cfiscsi_pdu_queue(response);
 524 }
 525
 526 static void
 527 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request)
 528 {
 529         struct iscsi_bhs_scsi_command *bhssc;
 530         struct cfiscsi_session *cs;
 531         union ctl_io *io;
 532         int error;
 533
 534         cs = PDU_SESSION(request);
 535         bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs;
 536         //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x",
 537         //    bhssc->bhssc_initiator_task_tag);
 538
 539         if (request->ip_data_len > 0 && cs->cs_immediate_data == false) {
 540                 CFISCSI_SESSION_WARN(cs, "unsolicited data with "
 541                     "ImmediateData=No; dropping connection");
 542                 icl_pdu_free(request);
 543                 cfiscsi_session_terminate(cs);
 544                 return;
 545         }
 546         io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref);
 547         if (io == NULL) {
 548                 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; "
 549                     "dropping connection");
 550                 icl_pdu_free(request);
 551                 cfiscsi_session_terminate(cs);
 552                 return;
 553         }
 554         ctl_zero_io(io);
 555         io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request;
 556         io->io_hdr.io_type = CTL_IO_SCSI;
 557         io->io_hdr.nexus.initid.id = cs->cs_ctl_initid;
 558         io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port;
 559         io->io_hdr.nexus.targ_target.id = 0;
 560         io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun);
 561         io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag;
 562         switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) {
 563         case BHSSC_FLAGS_ATTR_UNTAGGED:
 564                 io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 565                 break;
 566         case BHSSC_FLAGS_ATTR_SIMPLE:
 567                 io->scsiio.tag_type = CTL_TAG_SIMPLE;
 568                 break;
 569         case BHSSC_FLAGS_ATTR_ORDERED:
 570                 io->scsiio.tag_type = CTL_TAG_ORDERED;
 571                 break;
 572         case BHSSC_FLAGS_ATTR_HOQ:
 573                 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 574                 break;
 575         case BHSSC_FLAGS_ATTR_ACA:
 576                 io->scsiio.tag_type = CTL_TAG_ACA;
 577                 break;
 578         default:
 579                 io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 580                 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d",
 581                     bhssc->bhssc_flags & BHSSC_FLAGS_ATTR);
 582                 break;
 583         }
 584         io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */
 585         memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb));
 586         refcount_acquire(&cs->cs_outstanding_ctl_pdus);
 587         error = ctl_queue(io);
 588         if (error != CTL_RETVAL_COMPLETE) {
 589                 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; "
 590                     "dropping connection", error);
 591                 ctl_free_io(io);
 592                 refcount_release(&cs->cs_outstanding_ctl_pdus);
 593                 icl_pdu_free(request);
 594                 cfiscsi_session_terminate(cs);
 595         }
 596 }
 597
 598 static void
 599 cfiscsi_pdu_handle_task_request(struct icl_pdu *request)
 600 {
 601         struct iscsi_bhs_task_management_request *bhstmr;
 602         struct iscsi_bhs_task_management_response *bhstmr2;
 603         struct icl_pdu *response;
 604         struct cfiscsi_session *cs;
 605         union ctl_io *io;
 606         int error;
 607
 608         cs = PDU_SESSION(request);
 609         bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs;
 610         io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref);
 611         if (io == NULL) {
 612                 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;"
 613                     "dropping connection");
 614                 icl_pdu_free(request);
 615                 cfiscsi_session_terminate(cs);
 616                 return;
 617         }
 618         ctl_zero_io(io);
 619         io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request;
 620         io->io_hdr.io_type = CTL_IO_TASK;
 621         io->io_hdr.nexus.initid.id = cs->cs_ctl_initid;
 622         io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port;
 623         io->io_hdr.nexus.targ_target.id = 0;
 624         io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun);
 625         io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */
 626
 627         switch (bhstmr->bhstmr_function & ~0x80) {
 628         case BHSTMR_FUNCTION_ABORT_TASK:
 629 #if 0
 630                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK");
 631 #endif
 632                 io->taskio.task_action = CTL_TASK_ABORT_TASK;
 633                 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag;
 634                 break;
 635         case BHSTMR_FUNCTION_ABORT_TASK_SET:
 636 #if 0
 637                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET");
 638 #endif
 639                 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET;
 640                 break;
 641         case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET:
 642 #if 0
 643                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET");
 644 #endif
 645                 io->taskio.task_action = CTL_TASK_LUN_RESET;
 646                 break;
 647         case BHSTMR_FUNCTION_TARGET_WARM_RESET:
 648 #if 0
 649                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET");
 650 #endif
 651                 io->taskio.task_action = CTL_TASK_TARGET_RESET;
 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_queue(io);
 681         if (error != CTL_RETVAL_COMPLETE) {
 682                 CFISCSI_SESSION_WARN(cs, "ctl_queue() 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
 789                 if (cdw->cdw_sg_len == 0) {
 790                         /*
 791                          * End of current segment.
 792                          */
 793                         if (cdw->cdw_sg_index == ctl_sg_count - 1) {
 794                                 /*
 795                                  * Last segment in scatter/gather list.
 796                                  */
 797                                 break;
 798                         }
 799                         cdw->cdw_sg_index++;
 800                 }
 801
 802                 if (off == len) {
 803                         /*
 804                          * End of PDU payload.
 805                          */
 806                         break;
 807                 }
 808         }
 809
 810         if (len > off) {
 811                 /*
 812                  * In case of unsolicited data, it's possible that the buffer
 813                  * provided by CTL is smaller than negotiated FirstBurstLength.
 814                  * Just ignore the superfluous data; will ask for them with R2T
 815                  * on next call to cfiscsi_datamove().
 816                  *
 817                  * This obviously can only happen with SCSI Command PDU.
 818                  */
 819                 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 820                     ISCSI_BHS_OPCODE_SCSI_COMMAND)
 821                         return (true);
 822
 823                 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, "
 824                     "expected %zd; dropping connection",
 825                     icl_pdu_data_segment_length(request), off);
 826                 ctl_set_data_phase_error(&io->scsiio);
 827                 cfiscsi_session_terminate(cs);
 828                 return (true);
 829         }
 830
 831         if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len &&
 832             (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) {
 833                 CFISCSI_SESSION_WARN(cs, "got the final packet without "
 834                     "the F flag; flags = 0x%x; dropping connection",
 835                     bhsdo->bhsdo_flags);
 836                 ctl_set_data_phase_error(&io->scsiio);
 837                 cfiscsi_session_terminate(cs);
 838                 return (true);
 839         }
 840
 841         if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len &&
 842             (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) {
 843                 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 844                     ISCSI_BHS_OPCODE_SCSI_DATA_OUT) {
 845                         CFISCSI_SESSION_WARN(cs, "got the final packet, but the "
 846                             "transmitted size was %zd bytes instead of %d; "
 847                             "dropping connection",
 848                             (size_t)io->scsiio.ext_data_filled,
 849                             io->scsiio.kern_data_len);
 850                         ctl_set_data_phase_error(&io->scsiio);
 851                         cfiscsi_session_terminate(cs);
 852                         return (true);
 853                 } else {
 854                         /*
 855                          * For SCSI Command PDU, this just means we need to
 856                          * solicit more data by sending R2T.
 857                          */
 858                         return (false);
 859                 }
 860         }
 861
 862         if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) {
 863 #if 0
 864                 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target "
 865                     "transfer tag 0x%x", cdw->cdw_target_transfer_tag);
 866 #endif
 867
 868                 return (true);
 869         }
 870
 871         return (false);
 872 }
 873
 874 static void
 875 cfiscsi_pdu_handle_data_out(struct icl_pdu *request)
 876 {
 877         struct iscsi_bhs_data_out *bhsdo;
 878         struct cfiscsi_session *cs;
 879         struct cfiscsi_data_wait *cdw = NULL;
 880         union ctl_io *io;
 881         bool done;
 882
 883         cs = PDU_SESSION(request);
 884         bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs;
 885
 886         CFISCSI_SESSION_LOCK(cs);
 887         TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) {
 888 #if 0
 889                 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for "
 890                     "ttt 0x%x, itt 0x%x",
 891                     bhsdo->bhsdo_target_transfer_tag,
 892                     bhsdo->bhsdo_initiator_task_tag,
 893                     cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag));
 894 #endif
 895                 if (bhsdo->bhsdo_target_transfer_tag ==
 896                     cdw->cdw_target_transfer_tag)
 897                         break;
 898         }
 899         CFISCSI_SESSION_UNLOCK(cs);
 900         if (cdw == NULL) {
 901                 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag "
 902                     "0x%x, not found; dropping connection",
 903                     bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag);
 904                 icl_pdu_free(request);
 905                 cfiscsi_session_terminate(cs);
 906                 return;
 907         }
 908
 909         io = cdw->cdw_ctl_io;
 910         KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN,
 911             ("CTL_FLAG_DATA_IN"));
 912
 913         done = cfiscsi_handle_data_segment(request, cdw);
 914         if (done) {
 915                 CFISCSI_SESSION_LOCK(cs);
 916                 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next);
 917                 CFISCSI_SESSION_UNLOCK(cs);
 918                 uma_zfree(cfiscsi_data_wait_zone, cdw);
 919                 io->scsiio.be_move_done(io);
 920         }
 921
 922         icl_pdu_free(request);
 923 }
 924
 925 static void
 926 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request)
 927 {
 928         struct iscsi_bhs_logout_request *bhslr;
 929         struct iscsi_bhs_logout_response *bhslr2;
 930         struct icl_pdu *response;
 931         struct cfiscsi_session *cs;
 932
 933         cs = PDU_SESSION(request);
 934         bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs;
 935         switch (bhslr->bhslr_reason & 0x7f) {
 936         case BHSLR_REASON_CLOSE_SESSION:
 937         case BHSLR_REASON_CLOSE_CONNECTION:
 938                 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
 939                 if (response == NULL) {
 940                         CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory");
 941                         icl_pdu_free(request);
 942                         cfiscsi_session_terminate(cs);
 943                         return;
 944                 }
 945                 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs;
 946                 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE;
 947                 bhslr2->bhslr_flags = 0x80;
 948                 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY;
 949                 bhslr2->bhslr_initiator_task_tag =
 950                     bhslr->bhslr_initiator_task_tag;
 951                 icl_pdu_free(request);
 952                 cfiscsi_pdu_queue(response);
 953                 cfiscsi_session_terminate(cs);
 954                 break;
 955         case BHSLR_REASON_REMOVE_FOR_RECOVERY:
 956                 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
 957                 if (response == NULL) {
 958                         CFISCSI_SESSION_WARN(cs,
 959                             "failed to allocate memory; dropping connection");
 960                         icl_pdu_free(request);
 961                         cfiscsi_session_terminate(cs);
 962                         return;
 963                 }
 964                 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs;
 965                 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE;
 966                 bhslr2->bhslr_flags = 0x80;
 967                 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED;
 968                 bhslr2->bhslr_initiator_task_tag =
 969                     bhslr->bhslr_initiator_task_tag;
 970                 icl_pdu_free(request);
 971                 cfiscsi_pdu_queue(response);
 972                 break;
 973         default:
 974                 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection",
 975                     bhslr->bhslr_reason);
 976                 icl_pdu_free(request);
 977                 cfiscsi_session_terminate(cs);
 978                 break;
 979         }
 980 }
 981
 982 static void
 983 cfiscsi_callout(void *context)
 984 {
 985         struct icl_pdu *cp;
 986         struct iscsi_bhs_nop_in *bhsni;
 987         struct cfiscsi_session *cs;
 988
 989         cs = context;
 990
 991         if (cs->cs_terminating)
 992                 return;
 993
 994         callout_schedule(&cs->cs_callout, 1 * hz);
 995
 996         atomic_add_int(&cs->cs_timeout, 1);
 997
 998 #ifdef ICL_KERNEL_PROXY
 999         if (cs->cs_waiting_for_ctld || cs->cs_login_phase) {
1000                 if (cs->cs_timeout > login_timeout) {
1001                         CFISCSI_SESSION_WARN(cs, "login timed out after "
1002                             "%d seconds; dropping connection", cs->cs_timeout);
1003                         cfiscsi_session_terminate(cs);
1004                 }
1005                 return;
1006         }
1007 #endif
1008
1009         if (cs->cs_timeout >= ping_timeout) {
1010                 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; "
1011                     "dropping connection",  ping_timeout);
1012                 cfiscsi_session_terminate(cs);
1013                 return;
1014         }
1015
1016         /*
1017          * If the ping was reset less than one second ago - which means
1018          * that we've received some PDU during the last second - assume
1019          * the traffic flows correctly and don't bother sending a NOP-Out.
1020          *
1021          * (It's 2 - one for one second, and one for incrementing is_timeout
1022          * earlier in this routine.)
1023          */
1024         if (cs->cs_timeout < 2)
1025                 return;
1026
1027         cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT);
1028         if (cp == NULL) {
1029                 CFISCSI_SESSION_WARN(cs, "failed to allocate memory");
1030                 return;
1031         }
1032         bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs;
1033         bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN;
1034         bhsni->bhsni_flags = 0x80;
1035         bhsni->bhsni_initiator_task_tag = 0xffffffff;
1036
1037         cfiscsi_pdu_queue(cp);
1038 }
1039
1040 static void
1041 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs)
1042 {
1043         struct cfiscsi_data_wait *cdw;
1044         union ctl_io *io;
1045         int error, last;
1046
1047         io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref);
1048         if (io == NULL) {
1049                 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io");
1050                 return;
1051         }
1052         ctl_zero_io(io);
1053         io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs;
1054         io->io_hdr.io_type = CTL_IO_TASK;
1055         io->io_hdr.nexus.initid.id = cs->cs_ctl_initid;
1056         io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port;
1057         io->io_hdr.nexus.targ_target.id = 0;
1058         io->io_hdr.nexus.targ_lun = 0;
1059         io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */
1060         io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET;
1061         refcount_acquire(&cs->cs_outstanding_ctl_pdus);
1062         error = ctl_queue(io);
1063         if (error != CTL_RETVAL_COMPLETE) {
1064                 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error);
1065                 refcount_release(&cs->cs_outstanding_ctl_pdus);
1066                 ctl_free_io(io);
1067         }
1068
1069         CFISCSI_SESSION_LOCK(cs);
1070         while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) {
1071                 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next);
1072                 CFISCSI_SESSION_UNLOCK(cs);
1073                 /*
1074                  * Set nonzero port status; this prevents backends from
1075                  * assuming that the data transfer actually succeeded
1076                  * and writing uninitialized data to disk.
1077                  */
1078                 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42;
1079                 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io);
1080                 uma_zfree(cfiscsi_data_wait_zone, cdw);
1081                 CFISCSI_SESSION_LOCK(cs);
1082         }
1083         CFISCSI_SESSION_UNLOCK(cs);
1084
1085         /*
1086          * Wait for CTL to terminate all the tasks.
1087          */
1088         for (;;) {
1089                 refcount_acquire(&cs->cs_outstanding_ctl_pdus);
1090                 last = refcount_release(&cs->cs_outstanding_ctl_pdus);
1091                 if (last != 0)
1092                         break;
1093                 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, "
1094                     "%d remaining", cs->cs_outstanding_ctl_pdus);
1095                 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus),
1096                     0, "cfiscsi_terminate", hz / 100);
1097         }
1098 }
1099
1100 static void
1101 cfiscsi_maintenance_thread(void *arg)
1102 {
1103         struct cfiscsi_session *cs;
1104
1105         cs = arg;
1106
1107         for (;;) {
1108                 CFISCSI_SESSION_LOCK(cs);
1109                 if (cs->cs_terminating == false)
1110                         cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock);
1111                 CFISCSI_SESSION_UNLOCK(cs);
1112
1113                 if (cs->cs_terminating) {
1114
1115                         /*
1116                          * We used to wait up to 30 seconds to deliver queued
1117                          * PDUs to the initiator.  We also tried hard to deliver
1118                          * SCSI Responses for the aborted PDUs.  We don't do
1119                          * that anymore.  We might need to revisit that.
1120                          */
1121                         callout_drain(&cs->cs_callout);
1122                         icl_conn_shutdown(cs->cs_conn);
1123                         icl_conn_close(cs->cs_conn);
1124
1125                         /*
1126                          * At this point ICL receive thread is no longer
1127                          * running; no new tasks can be queued.
1128                          */
1129                         cfiscsi_session_terminate_tasks(cs);
1130                         cfiscsi_session_delete(cs);
1131                         kthread_exit();
1132                         return;
1133                 }
1134                 CFISCSI_SESSION_DEBUG(cs, "nothing to do");
1135         }
1136 }
1137
1138 static void
1139 cfiscsi_session_terminate(struct cfiscsi_session *cs)
1140 {
1141
1142         if (cs->cs_terminating)
1143                 return;
1144         cs->cs_terminating = true;
1145         cv_signal(&cs->cs_maintenance_cv);
1146 #ifdef ICL_KERNEL_PROXY
1147         cv_signal(&cs->cs_login_cv);
1148 #endif
1149 }
1150
1151 static int
1152 cfiscsi_session_register_initiator(struct cfiscsi_session *cs)
1153 {
1154         struct cfiscsi_target *ct;
1155         char *name;
1156         int i;
1157
1158         KASSERT(cs->cs_ctl_initid == -1, ("already registered"));
1159
1160         ct = cs->cs_target;
1161         name = strdup(cs->cs_initiator_id, M_CTL);
1162         i = ctl_add_initiator(&ct->ct_port, -1, 0, name);
1163         if (i < 0) {
1164                 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d",
1165                     i);
1166                 cs->cs_ctl_initid = -1;
1167                 return (1);
1168         }
1169         cs->cs_ctl_initid = i;
1170 #if 0
1171         CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i);
1172 #endif
1173
1174         return (0);
1175 }
1176
1177 static void
1178 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs)
1179 {
1180         int error;
1181
1182         if (cs->cs_ctl_initid == -1)
1183                 return;
1184
1185         error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid);
1186         if (error != 0) {
1187                 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d",
1188                     error);
1189         }
1190         cs->cs_ctl_initid = -1;
1191 }
1192
1193 static struct cfiscsi_session *
1194 cfiscsi_session_new(struct cfiscsi_softc *softc)
1195 {
1196         struct cfiscsi_session *cs;
1197         int error;
1198
1199         cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO);
1200         if (cs == NULL) {
1201                 CFISCSI_WARN("malloc failed");
1202                 return (NULL);
1203         }
1204         cs->cs_ctl_initid = -1;
1205
1206         refcount_init(&cs->cs_outstanding_ctl_pdus, 0);
1207         TAILQ_INIT(&cs->cs_waiting_for_data_out);
1208         mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF);
1209         cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt");
1210 #ifdef ICL_KERNEL_PROXY
1211         cv_init(&cs->cs_login_cv, "cfiscsi_login");
1212 #endif
1213
1214         cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock);
1215         cs->cs_conn->ic_receive = cfiscsi_receive_callback;
1216         cs->cs_conn->ic_error = cfiscsi_error_callback;
1217         cs->cs_conn->ic_prv0 = cs;
1218
1219         error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt");
1220         if (error != 0) {
1221                 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error);
1222                 free(cs, M_CFISCSI);
1223                 return (NULL);
1224         }
1225
1226         mtx_lock(&softc->lock);
1227         cs->cs_id = softc->last_session_id + 1;
1228         softc->last_session_id++;
1229         mtx_unlock(&softc->lock);
1230
1231         mtx_lock(&softc->lock);
1232         TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next);
1233         mtx_unlock(&softc->lock);
1234
1235         /*
1236          * Start pinging the initiator.
1237          */
1238         callout_init(&cs->cs_callout, 1);
1239         callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs);
1240
1241         return (cs);
1242 }
1243
1244 static void
1245 cfiscsi_session_delete(struct cfiscsi_session *cs)
1246 {
1247         struct cfiscsi_softc *softc;
1248
1249         softc = &cfiscsi_softc;
1250
1251         KASSERT(cs->cs_outstanding_ctl_pdus == 0,
1252             ("destroying session with outstanding CTL pdus"));
1253         KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out),
1254             ("destroying session with non-empty queue"));
1255
1256         cfiscsi_session_unregister_initiator(cs);
1257         if (cs->cs_target != NULL)
1258                 cfiscsi_target_release(cs->cs_target);
1259         icl_conn_close(cs->cs_conn);
1260         icl_conn_free(cs->cs_conn);
1261
1262         mtx_lock(&softc->lock);
1263         TAILQ_REMOVE(&softc->sessions, cs, cs_next);
1264         mtx_unlock(&softc->lock);
1265
1266         free(cs, M_CFISCSI);
1267 }
1268
1269 int
1270 cfiscsi_init(void)
1271 {
1272         struct cfiscsi_softc *softc;
1273         int retval;
1274
1275         softc = &cfiscsi_softc;
1276         retval = 0;
1277         bzero(softc, sizeof(*softc));
1278         mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF);
1279
1280 #ifdef ICL_KERNEL_PROXY
1281         cv_init(&softc->accept_cv, "cfiscsi_accept");
1282 #endif
1283         TAILQ_INIT(&softc->sessions);
1284         TAILQ_INIT(&softc->targets);
1285
1286         cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait",
1287             sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL,
1288             UMA_ALIGN_PTR, 0);
1289
1290         return (0);
1291 }
1292
1293 #ifdef ICL_KERNEL_PROXY
1294 static void
1295 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id)
1296 {
1297         struct cfiscsi_session *cs;
1298
1299         cs = cfiscsi_session_new(&cfiscsi_softc);
1300         if (cs == NULL) {
1301                 CFISCSI_WARN("failed to create session");
1302                 return;
1303         }
1304
1305         icl_conn_handoff_sock(cs->cs_conn, so);
1306         cs->cs_initiator_sa = sa;
1307         cs->cs_portal_id = portal_id;
1308         cs->cs_waiting_for_ctld = true;
1309         cv_signal(&cfiscsi_softc.accept_cv);
1310 }
1311 #endif
1312
1313 static void
1314 cfiscsi_online(void *arg)
1315 {
1316         struct cfiscsi_softc *softc;
1317         struct cfiscsi_target *ct;
1318         int online;
1319
1320         ct = (struct cfiscsi_target *)arg;
1321         softc = ct->ct_softc;
1322
1323         mtx_lock(&softc->lock);
1324         if (ct->ct_online) {
1325                 mtx_unlock(&softc->lock);
1326                 return;
1327         }
1328         ct->ct_online = 1;
1329         online = softc->online++;
1330         mtx_unlock(&softc->lock);
1331         if (online > 0)
1332                 return;
1333
1334 #ifdef ICL_KERNEL_PROXY
1335         if (softc->listener != NULL)
1336                 icl_listen_free(softc->listener);
1337         softc->listener = icl_listen_new(cfiscsi_accept);
1338 #endif
1339 }
1340
1341 static void
1342 cfiscsi_offline(void *arg)
1343 {
1344         struct cfiscsi_softc *softc;
1345         struct cfiscsi_target *ct;
1346         struct cfiscsi_session *cs;
1347         int online;
1348
1349         ct = (struct cfiscsi_target *)arg;
1350         softc = ct->ct_softc;
1351
1352         mtx_lock(&softc->lock);
1353         if (!ct->ct_online) {
1354                 mtx_unlock(&softc->lock);
1355                 return;
1356         }
1357         ct->ct_online = 0;
1358         online = --softc->online;
1359
1360         TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1361                 if (cs->cs_target == ct)
1362                         cfiscsi_session_terminate(cs);
1363         }
1364         mtx_unlock(&softc->lock);
1365         if (online > 0)
1366                 return;
1367
1368 #ifdef ICL_KERNEL_PROXY
1369         icl_listen_free(softc->listener);
1370         softc->listener = NULL;
1371 #endif
1372 }
1373
1374 static int
1375 cfiscsi_info(void *arg, struct sbuf *sb)
1376 {
1377         struct cfiscsi_target *ct = (struct cfiscsi_target *)arg;
1378         int retval;
1379
1380         retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n",
1381             ct->ct_state);
1382         return (retval);
1383 }
1384
1385 static void
1386 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci)
1387 {
1388         struct cfiscsi_softc *softc;
1389         struct cfiscsi_session *cs, *cs2;
1390         struct cfiscsi_target *ct;
1391         struct ctl_iscsi_handoff_params *cihp;
1392         int error;
1393
1394         cihp = (struct ctl_iscsi_handoff_params *)&(ci->data);
1395         softc = &cfiscsi_softc;
1396
1397         CFISCSI_DEBUG("new connection from %s (%s) to %s",
1398             cihp->initiator_name, cihp->initiator_addr,
1399             cihp->target_name);
1400
1401         ct = cfiscsi_target_find(softc, cihp->target_name);
1402         if (ct == NULL) {
1403                 ci->status = CTL_ISCSI_ERROR;
1404                 snprintf(ci->error_str, sizeof(ci->error_str),
1405                     "%s: target not found", __func__);
1406                 return;
1407         }
1408
1409         if (ct->ct_online == 0) {
1410                 ci->status = CTL_ISCSI_ERROR;
1411                 snprintf(ci->error_str, sizeof(ci->error_str),
1412                     "%s: port offline", __func__);
1413                 cfiscsi_target_release(ct);
1414                 return;
1415         }
1416
1417 #ifdef ICL_KERNEL_PROXY
1418         if (cihp->socket > 0 && cihp->connection_id > 0) {
1419                 snprintf(ci->error_str, sizeof(ci->error_str),
1420                     "both socket and connection_id set");
1421                 ci->status = CTL_ISCSI_ERROR;
1422                 cfiscsi_target_release(ct);
1423                 return;
1424         }
1425         if (cihp->socket == 0) {
1426                 mtx_lock(&cfiscsi_softc.lock);
1427                 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1428                         if (cs->cs_id == cihp->socket)
1429                                 break;
1430                 }
1431                 if (cs == NULL) {
1432                         mtx_unlock(&cfiscsi_softc.lock);
1433                         snprintf(ci->error_str, sizeof(ci->error_str),
1434                             "connection not found");
1435                         ci->status = CTL_ISCSI_ERROR;
1436                         cfiscsi_target_release(ct);
1437                         return;
1438                 }
1439                 mtx_unlock(&cfiscsi_softc.lock);
1440         } else {
1441 #endif
1442                 cs = cfiscsi_session_new(softc);
1443                 if (cs == NULL) {
1444                         ci->status = CTL_ISCSI_ERROR;
1445                         snprintf(ci->error_str, sizeof(ci->error_str),
1446                             "%s: cfiscsi_session_new failed", __func__);
1447                         cfiscsi_target_release(ct);
1448                         return;
1449                 }
1450 #ifdef ICL_KERNEL_PROXY
1451         }
1452 #endif
1453         cs->cs_target = ct;
1454
1455         /*
1456          * First PDU of Full Feature phase has the same CmdSN as the last
1457          * PDU from the Login Phase received from the initiator.  Thus,
1458          * the -1 below.
1459          */
1460         cs->cs_portal_group_tag = cihp->portal_group_tag;
1461         cs->cs_cmdsn = cihp->cmdsn;
1462         cs->cs_statsn = cihp->statsn;
1463         cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length;
1464         cs->cs_max_burst_length = cihp->max_burst_length;
1465         cs->cs_immediate_data = !!cihp->immediate_data;
1466         if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C)
1467                 cs->cs_conn->ic_header_crc32c = true;
1468         if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C)
1469                 cs->cs_conn->ic_data_crc32c = true;
1470
1471         strlcpy(cs->cs_initiator_name,
1472             cihp->initiator_name, sizeof(cs->cs_initiator_name));
1473         strlcpy(cs->cs_initiator_addr,
1474             cihp->initiator_addr, sizeof(cs->cs_initiator_addr));
1475         strlcpy(cs->cs_initiator_alias,
1476             cihp->initiator_alias, sizeof(cs->cs_initiator_alias));
1477         memcpy(cs->cs_initiator_isid,
1478             cihp->initiator_isid, sizeof(cs->cs_initiator_isid));
1479         snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id),
1480             "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name,
1481             cihp->initiator_isid[0], cihp->initiator_isid[1],
1482             cihp->initiator_isid[2], cihp->initiator_isid[3],
1483             cihp->initiator_isid[4], cihp->initiator_isid[5]);
1484
1485         refcount_acquire(&cs->cs_outstanding_ctl_pdus);
1486 restart:
1487         if (!cs->cs_terminating) {
1488                 mtx_lock(&softc->lock);
1489                 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) {
1490                         if (cs2 != cs && cs2->cs_tasks_aborted == false &&
1491                             cs->cs_target == cs2->cs_target &&
1492                             cs->cs_portal_group_tag == cs2->cs_portal_group_tag &&
1493                             strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) {
1494                                 cfiscsi_session_terminate(cs2);
1495                                 mtx_unlock(&softc->lock);
1496                                 pause("cfiscsi_reinstate", 1);
1497                                 goto restart;
1498                         }
1499                 }
1500                 mtx_unlock(&softc->lock);
1501         }
1502
1503         /*
1504          * Register initiator with CTL.
1505          */
1506         cfiscsi_session_register_initiator(cs);
1507
1508 #ifdef ICL_KERNEL_PROXY
1509         if (cihp->socket > 0) {
1510 #endif
1511                 error = icl_conn_handoff(cs->cs_conn, cihp->socket);
1512                 if (error != 0) {
1513                         cfiscsi_session_terminate(cs);
1514                         refcount_release(&cs->cs_outstanding_ctl_pdus);
1515                         ci->status = CTL_ISCSI_ERROR;
1516                         snprintf(ci->error_str, sizeof(ci->error_str),
1517                             "%s: icl_conn_handoff failed with error %d",
1518                             __func__, error);
1519                         return;
1520                 }
1521 #ifdef ICL_KERNEL_PROXY
1522         }
1523 #endif
1524
1525 #ifdef ICL_KERNEL_PROXY
1526         cs->cs_login_phase = false;
1527
1528         /*
1529          * First PDU of the Full Feature phase has likely already arrived.
1530          * We have to pick it up and execute properly.
1531          */
1532         if (cs->cs_login_pdu != NULL) {
1533                 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU");
1534                 cfiscsi_pdu_handle(cs->cs_login_pdu);
1535                 cs->cs_login_pdu = NULL;
1536         }
1537 #endif
1538
1539         refcount_release(&cs->cs_outstanding_ctl_pdus);
1540         ci->status = CTL_ISCSI_OK;
1541 }
1542
1543 static void
1544 cfiscsi_ioctl_list(struct ctl_iscsi *ci)
1545 {
1546         struct ctl_iscsi_list_params *cilp;
1547         struct cfiscsi_session *cs;
1548         struct cfiscsi_softc *softc;
1549         struct sbuf *sb;
1550         int error;
1551
1552         cilp = (struct ctl_iscsi_list_params *)&(ci->data);
1553         softc = &cfiscsi_softc;
1554
1555         sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN);
1556         if (sb == NULL) {
1557                 ci->status = CTL_ISCSI_ERROR;
1558                 snprintf(ci->error_str, sizeof(ci->error_str),
1559                     "Unable to allocate %d bytes for iSCSI session list",
1560                     cilp->alloc_len);
1561                 return;
1562         }
1563
1564         sbuf_printf(sb, "<ctlislist>\n");
1565         mtx_lock(&softc->lock);
1566         TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1567 #ifdef ICL_KERNEL_PROXY
1568                 if (cs->cs_target == NULL)
1569                         continue;
1570 #endif
1571                 error = sbuf_printf(sb, "<connection id=\"%d\">"
1572                     "<initiator>%s</initiator>"
1573                     "<initiator_addr>%s</initiator_addr>"
1574                     "<initiator_alias>%s</initiator_alias>"
1575                     "<target>%s</target>"
1576                     "<target_alias>%s</target_alias>"
1577                     "<header_digest>%s</header_digest>"
1578                     "<data_digest>%s</data_digest>"
1579                     "<max_data_segment_length>%zd</max_data_segment_length>"
1580                     "<immediate_data>%d</immediate_data>"
1581                     "<iser>%d</iser>"
1582                     "</connection>\n",
1583                     cs->cs_id,
1584                     cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias,
1585                     cs->cs_target->ct_name, cs->cs_target->ct_alias,
1586                     cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None",
1587                     cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None",
1588                     cs->cs_max_data_segment_length,
1589                     cs->cs_immediate_data,
1590                     cs->cs_conn->ic_iser);
1591                 if (error != 0)
1592                         break;
1593         }
1594         mtx_unlock(&softc->lock);
1595         error = sbuf_printf(sb, "</ctlislist>\n");
1596         if (error != 0) {
1597                 sbuf_delete(sb);
1598                 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE;
1599                 snprintf(ci->error_str, sizeof(ci->error_str),
1600                     "Out of space, %d bytes is too small", cilp->alloc_len);
1601                 return;
1602         }
1603         sbuf_finish(sb);
1604
1605         error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1);
1606         cilp->fill_len = sbuf_len(sb) + 1;
1607         ci->status = CTL_ISCSI_OK;
1608         sbuf_delete(sb);
1609 }
1610
1611 static void
1612 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci)
1613 {
1614         struct icl_pdu *response;
1615         struct iscsi_bhs_asynchronous_message *bhsam;
1616         struct ctl_iscsi_terminate_params *citp;
1617         struct cfiscsi_session *cs;
1618         struct cfiscsi_softc *softc;
1619         int found = 0;
1620
1621         citp = (struct ctl_iscsi_terminate_params *)&(ci->data);
1622         softc = &cfiscsi_softc;
1623
1624         mtx_lock(&softc->lock);
1625         TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1626                 if (citp->all == 0 && cs->cs_id != citp->connection_id &&
1627                     strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 &&
1628                     strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0)
1629                         continue;
1630
1631                 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT);
1632                 if (response == NULL) {
1633                         /*
1634                          * Oh well.  Just terminate the connection.
1635                          */
1636                 } else {
1637                         bhsam = (struct iscsi_bhs_asynchronous_message *)
1638                             response->ip_bhs;
1639                         bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE;
1640                         bhsam->bhsam_flags = 0x80;
1641                         bhsam->bhsam_0xffffffff = 0xffffffff;
1642                         bhsam->bhsam_async_event =
1643                             BHSAM_EVENT_TARGET_TERMINATES_SESSION;
1644                         cfiscsi_pdu_queue(response);
1645                 }
1646                 cfiscsi_session_terminate(cs);
1647                 found++;
1648         }
1649         mtx_unlock(&softc->lock);
1650
1651         if (found == 0) {
1652                 ci->status = CTL_ISCSI_SESSION_NOT_FOUND;
1653                 snprintf(ci->error_str, sizeof(ci->error_str),
1654                     "No matching connections found");
1655                 return;
1656         }
1657
1658         ci->status = CTL_ISCSI_OK;
1659 }
1660
1661 static void
1662 cfiscsi_ioctl_logout(struct ctl_iscsi *ci)
1663 {
1664         struct icl_pdu *response;
1665         struct iscsi_bhs_asynchronous_message *bhsam;
1666         struct ctl_iscsi_logout_params *cilp;
1667         struct cfiscsi_session *cs;
1668         struct cfiscsi_softc *softc;
1669         int found = 0;
1670
1671         cilp = (struct ctl_iscsi_logout_params *)&(ci->data);
1672         softc = &cfiscsi_softc;
1673
1674         mtx_lock(&softc->lock);
1675         TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1676                 if (cilp->all == 0 && cs->cs_id != cilp->connection_id &&
1677                     strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 &&
1678                     strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0)
1679                         continue;
1680
1681                 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT);
1682                 if (response == NULL) {
1683                         ci->status = CTL_ISCSI_ERROR;
1684                         snprintf(ci->error_str, sizeof(ci->error_str),
1685                             "Unable to allocate memory");
1686                         mtx_unlock(&softc->lock);
1687                         return;
1688                 }
1689                 bhsam =
1690                     (struct iscsi_bhs_asynchronous_message *)response->ip_bhs;
1691                 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE;
1692                 bhsam->bhsam_flags = 0x80;
1693                 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT;
1694                 bhsam->bhsam_parameter3 = htons(10);
1695                 cfiscsi_pdu_queue(response);
1696                 found++;
1697         }
1698         mtx_unlock(&softc->lock);
1699
1700         if (found == 0) {
1701                 ci->status = CTL_ISCSI_SESSION_NOT_FOUND;
1702                 snprintf(ci->error_str, sizeof(ci->error_str),
1703                     "No matching connections found");
1704                 return;
1705         }
1706
1707         ci->status = CTL_ISCSI_OK;
1708 }
1709
1710 #ifdef ICL_KERNEL_PROXY
1711 static void
1712 cfiscsi_ioctl_listen(struct ctl_iscsi *ci)
1713 {
1714         struct ctl_iscsi_listen_params *cilp;
1715         struct sockaddr *sa;
1716         int error;
1717
1718         cilp = (struct ctl_iscsi_listen_params *)&(ci->data);
1719
1720         if (cfiscsi_softc.listener == NULL) {
1721                 CFISCSI_DEBUG("no listener");
1722                 snprintf(ci->error_str, sizeof(ci->error_str), "no listener");
1723                 ci->status = CTL_ISCSI_ERROR;
1724                 return;
1725         }
1726
1727         error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen);
1728         if (error != 0) {
1729                 CFISCSI_DEBUG("getsockaddr, error %d", error);
1730                 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed");
1731                 ci->status = CTL_ISCSI_ERROR;
1732                 return;
1733         }
1734
1735         error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain,
1736             cilp->socktype, cilp->protocol, sa, cilp->portal_id);
1737         if (error != 0) {
1738                 free(sa, M_SONAME);
1739                 CFISCSI_DEBUG("icl_listen_add, error %d", error);
1740                 snprintf(ci->error_str, sizeof(ci->error_str),
1741                     "icl_listen_add failed, error %d", error);
1742                 ci->status = CTL_ISCSI_ERROR;
1743                 return;
1744         }
1745
1746         ci->status = CTL_ISCSI_OK;
1747 }
1748
1749 static void
1750 cfiscsi_ioctl_accept(struct ctl_iscsi *ci)
1751 {
1752         struct ctl_iscsi_accept_params *ciap;
1753         struct cfiscsi_session *cs;
1754         int error;
1755
1756         ciap = (struct ctl_iscsi_accept_params *)&(ci->data);
1757
1758         mtx_lock(&cfiscsi_softc.lock);
1759         for (;;) {
1760                 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1761                         if (cs->cs_waiting_for_ctld)
1762                                 break;
1763                 }
1764                 if (cs != NULL)
1765                         break;
1766                 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock);
1767                 if (error != 0) {
1768                         mtx_unlock(&cfiscsi_softc.lock);
1769                         snprintf(ci->error_str, sizeof(ci->error_str), "interrupted");
1770                         ci->status = CTL_ISCSI_ERROR;
1771                         return;
1772                 }
1773         }
1774         mtx_unlock(&cfiscsi_softc.lock);
1775
1776         cs->cs_waiting_for_ctld = false;
1777         cs->cs_login_phase = true;
1778
1779         ciap->connection_id = cs->cs_id;
1780         ciap->portal_id = cs->cs_portal_id;
1781         ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len;
1782         error = copyout(cs->cs_initiator_sa, ciap->initiator_addr,
1783             cs->cs_initiator_sa->sa_len);
1784         if (error != 0) {
1785                 snprintf(ci->error_str, sizeof(ci->error_str),
1786                     "copyout failed with error %d", error);
1787                 ci->status = CTL_ISCSI_ERROR;
1788                 return;
1789         }
1790
1791         ci->status = CTL_ISCSI_OK;
1792 }
1793
1794 static void
1795 cfiscsi_ioctl_send(struct ctl_iscsi *ci)
1796 {
1797         struct ctl_iscsi_send_params *cisp;
1798         struct cfiscsi_session *cs;
1799         struct icl_pdu *ip;
1800         size_t datalen;
1801         void *data;
1802         int error;
1803
1804         cisp = (struct ctl_iscsi_send_params *)&(ci->data);
1805
1806         mtx_lock(&cfiscsi_softc.lock);
1807         TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1808                 if (cs->cs_id == cisp->connection_id)
1809                         break;
1810         }
1811         if (cs == NULL) {
1812                 mtx_unlock(&cfiscsi_softc.lock);
1813                 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found");
1814                 ci->status = CTL_ISCSI_ERROR;
1815                 return;
1816         }
1817         mtx_unlock(&cfiscsi_softc.lock);
1818
1819 #if 0
1820         if (cs->cs_login_phase == false)
1821                 return (EBUSY);
1822 #endif
1823
1824         if (cs->cs_terminating) {
1825                 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating");
1826                 ci->status = CTL_ISCSI_ERROR;
1827                 return;
1828         }
1829
1830         datalen = cisp->data_segment_len;
1831         /*
1832          * XXX
1833          */
1834         //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) {
1835         if (datalen > 65535) {
1836                 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big");
1837                 ci->status = CTL_ISCSI_ERROR;
1838                 return;
1839         }
1840         if (datalen > 0) {
1841                 data = malloc(datalen, M_CFISCSI, M_WAITOK);
1842                 error = copyin(cisp->data_segment, data, datalen);
1843                 if (error != 0) {
1844                         free(data, M_CFISCSI);
1845                         snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error);
1846                         ci->status = CTL_ISCSI_ERROR;
1847                         return;
1848                 }
1849         }
1850
1851         ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK);
1852         memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs));
1853         if (datalen > 0) {
1854                 icl_pdu_append_data(ip, data, datalen, M_WAITOK);
1855                 free(data, M_CFISCSI);
1856         }
1857         CFISCSI_SESSION_LOCK(cs);
1858         icl_pdu_queue(ip);
1859         CFISCSI_SESSION_UNLOCK(cs);
1860         ci->status = CTL_ISCSI_OK;
1861 }
1862
1863 static void
1864 cfiscsi_ioctl_receive(struct ctl_iscsi *ci)
1865 {
1866         struct ctl_iscsi_receive_params *cirp;
1867         struct cfiscsi_session *cs;
1868         struct icl_pdu *ip;
1869         void *data;
1870         int error;
1871
1872         cirp = (struct ctl_iscsi_receive_params *)&(ci->data);
1873
1874         mtx_lock(&cfiscsi_softc.lock);
1875         TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1876                 if (cs->cs_id == cirp->connection_id)
1877                         break;
1878         }
1879         if (cs == NULL) {
1880                 mtx_unlock(&cfiscsi_softc.lock);
1881                 snprintf(ci->error_str, sizeof(ci->error_str),
1882                     "connection not found");
1883                 ci->status = CTL_ISCSI_ERROR;
1884                 return;
1885         }
1886         mtx_unlock(&cfiscsi_softc.lock);
1887
1888 #if 0
1889         if (is->is_login_phase == false)
1890                 return (EBUSY);
1891 #endif
1892
1893         CFISCSI_SESSION_LOCK(cs);
1894         while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) {
1895                 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock);
1896                 if (error != 0) {
1897                         CFISCSI_SESSION_UNLOCK(cs);
1898                         snprintf(ci->error_str, sizeof(ci->error_str),
1899                             "interrupted by signal");
1900                         ci->status = CTL_ISCSI_ERROR;
1901                         return;
1902                 }
1903         }
1904
1905         if (cs->cs_terminating) {
1906                 CFISCSI_SESSION_UNLOCK(cs);
1907                 snprintf(ci->error_str, sizeof(ci->error_str),
1908                     "connection terminating");
1909                 ci->status = CTL_ISCSI_ERROR;
1910                 return;
1911         }
1912         ip = cs->cs_login_pdu;
1913         cs->cs_login_pdu = NULL;
1914         CFISCSI_SESSION_UNLOCK(cs);
1915
1916         if (ip->ip_data_len > cirp->data_segment_len) {
1917                 icl_pdu_free(ip);
1918                 snprintf(ci->error_str, sizeof(ci->error_str),
1919                     "data segment too big");
1920                 ci->status = CTL_ISCSI_ERROR;
1921                 return;
1922         }
1923
1924         copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs));
1925         if (ip->ip_data_len > 0) {
1926                 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK);
1927                 icl_pdu_get_data(ip, 0, data, ip->ip_data_len);
1928                 copyout(data, cirp->data_segment, ip->ip_data_len);
1929                 free(data, M_CFISCSI);
1930         }
1931
1932         icl_pdu_free(ip);
1933         ci->status = CTL_ISCSI_OK;
1934 }
1935
1936 #endif /* !ICL_KERNEL_PROXY */
1937
1938 static void
1939 cfiscsi_ioctl_port_create(struct ctl_req *req)
1940 {
1941         struct cfiscsi_target *ct;
1942         struct ctl_port *port;
1943         const char *target, *alias, *tag;
1944         struct scsi_vpd_id_descriptor *desc;
1945         ctl_options_t opts;
1946         int retval, len, idlen;
1947
1948         ctl_init_opts(&opts, req->num_args, req->kern_args);
1949         target = ctl_get_opt(&opts, "cfiscsi_target");
1950         alias = ctl_get_opt(&opts, "cfiscsi_target_alias");
1951         tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag");
1952         if (target == NULL || tag == NULL) {
1953                 req->status = CTL_LUN_ERROR;
1954                 snprintf(req->error_str, sizeof(req->error_str),
1955                     "Missing required argument");
1956                 ctl_free_opts(&opts);
1957                 return;
1958         }
1959         ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias);
1960         if (ct == NULL) {
1961                 req->status = CTL_LUN_ERROR;
1962                 snprintf(req->error_str, sizeof(req->error_str),
1963                     "failed to create target \"%s\"", target);
1964                 ctl_free_opts(&opts);
1965                 return;
1966         }
1967         if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) {
1968                 req->status = CTL_LUN_ERROR;
1969                 snprintf(req->error_str, sizeof(req->error_str),
1970                     "target \"%s\" already exist", target);
1971                 cfiscsi_target_release(ct);
1972                 ctl_free_opts(&opts);
1973                 return;
1974         }
1975         port = &ct->ct_port;
1976         if (ct->ct_state == CFISCSI_TARGET_STATE_DYING)
1977                 goto done;
1978
1979         port->frontend = &cfiscsi_frontend;
1980         port->port_type = CTL_PORT_ISCSI;
1981         /* XXX KDM what should the real number be here? */
1982         port->num_requested_ctl_io = 4096;
1983         port->port_name = "iscsi";
1984         port->virtual_port = strtoul(tag, NULL, 0);
1985         port->port_online = cfiscsi_online;
1986         port->port_offline = cfiscsi_offline;
1987         port->port_info = cfiscsi_info;
1988         port->onoff_arg = ct;
1989         port->lun_enable = cfiscsi_lun_enable;
1990         port->lun_disable = cfiscsi_lun_disable;
1991         port->lun_map = cfiscsi_lun_map;
1992         port->targ_lun_arg = ct;
1993         port->fe_datamove = cfiscsi_datamove;
1994         port->fe_done = cfiscsi_done;
1995
1996         /* XXX KDM what should we report here? */
1997         /* XXX These should probably be fetched from CTL. */
1998         port->max_targets = 1;
1999         port->max_target_id = 15;
2000
2001         port->options = opts;
2002         STAILQ_INIT(&opts);
2003
2004         /* Generate Port ID. */
2005         idlen = strlen(target) + strlen(",t,0x0001") + 1;
2006         idlen = roundup2(idlen, 4);
2007         len = sizeof(struct scsi_vpd_device_id) + idlen;
2008         port->port_devid = malloc(sizeof(struct ctl_devid) + len,
2009             M_CTL, M_WAITOK | M_ZERO);
2010         port->port_devid->len = len;
2011         desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data;
2012         desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8;
2013         desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT |
2014             SVPD_ID_TYPE_SCSI_NAME;
2015         desc->length = idlen;
2016         snprintf(desc->identifier, idlen, "%s,t,0x%4.4x",
2017             target, port->virtual_port);
2018
2019         /* Generate Target ID. */
2020         idlen = strlen(target) + 1;
2021         idlen = roundup2(idlen, 4);
2022         len = sizeof(struct scsi_vpd_device_id) + idlen;
2023         port->target_devid = malloc(sizeof(struct ctl_devid) + len,
2024             M_CTL, M_WAITOK | M_ZERO);
2025         port->target_devid->len = len;
2026         desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data;
2027         desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8;
2028         desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET |
2029             SVPD_ID_TYPE_SCSI_NAME;
2030         desc->length = idlen;
2031         strlcpy(desc->identifier, target, idlen);
2032
2033         retval = ctl_port_register(port, /*master_SC*/ 1);
2034         if (retval != 0) {
2035                 ctl_free_opts(&port->options);
2036                 cfiscsi_target_release(ct);
2037                 free(port->port_devid, M_CFISCSI);
2038                 free(port->target_devid, M_CFISCSI);
2039                 req->status = CTL_LUN_ERROR;
2040                 snprintf(req->error_str, sizeof(req->error_str),
2041                     "ctl_frontend_register() failed with error %d", retval);
2042                 return;
2043         }
2044 done:
2045         ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE;
2046         req->status = CTL_LUN_OK;
2047         memcpy(req->kern_args[0].kvalue, &port->targ_port,
2048             sizeof(port->targ_port)); //XXX
2049 }
2050
2051 static void
2052 cfiscsi_ioctl_port_remove(struct ctl_req *req)
2053 {
2054         struct cfiscsi_target *ct;
2055         const char *target;
2056         ctl_options_t opts;
2057
2058         ctl_init_opts(&opts, req->num_args, req->kern_args);
2059         target = ctl_get_opt(&opts, "cfiscsi_target");
2060         if (target == NULL) {
2061                 ctl_free_opts(&opts);
2062                 req->status = CTL_LUN_ERROR;
2063                 snprintf(req->error_str, sizeof(req->error_str),
2064                     "Missing required argument");
2065                 return;
2066         }
2067         ct = cfiscsi_target_find(&cfiscsi_softc, target);
2068         if (ct == NULL) {
2069                 ctl_free_opts(&opts);
2070                 req->status = CTL_LUN_ERROR;
2071                 snprintf(req->error_str, sizeof(req->error_str),
2072                     "can't find target \"%s\"", target);
2073                 return;
2074         }
2075         if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) {
2076                 ctl_free_opts(&opts);
2077                 req->status = CTL_LUN_ERROR;
2078                 snprintf(req->error_str, sizeof(req->error_str),
2079                     "target \"%s\" is already dying", target);
2080                 return;
2081         }
2082         ctl_free_opts(&opts);
2083
2084         ct->ct_state = CFISCSI_TARGET_STATE_DYING;
2085         ctl_port_offline(&ct->ct_port);
2086         cfiscsi_target_release(ct);
2087         cfiscsi_target_release(ct);
2088 }
2089
2090 static int
2091 cfiscsi_ioctl(struct cdev *dev,
2092     u_long cmd, caddr_t addr, int flag, struct thread *td)
2093 {
2094         struct ctl_iscsi *ci;
2095         struct ctl_req *req;
2096
2097         if (cmd == CTL_PORT_REQ) {
2098                 req = (struct ctl_req *)addr;
2099                 switch (req->reqtype) {
2100                 case CTL_REQ_CREATE:
2101                         cfiscsi_ioctl_port_create(req);
2102                         break;
2103                 case CTL_REQ_REMOVE:
2104                         cfiscsi_ioctl_port_remove(req);
2105                         break;
2106                 default:
2107                         req->status = CTL_LUN_ERROR;
2108                         snprintf(req->error_str, sizeof(req->error_str),
2109                             "Unsupported request type %d", req->reqtype);
2110                 }
2111                 return (0);
2112         }
2113
2114         if (cmd != CTL_ISCSI)
2115                 return (ENOTTY);
2116
2117         ci = (struct ctl_iscsi *)addr;
2118         switch (ci->type) {
2119         case CTL_ISCSI_HANDOFF:
2120                 cfiscsi_ioctl_handoff(ci);
2121                 break;
2122         case CTL_ISCSI_LIST:
2123                 cfiscsi_ioctl_list(ci);
2124                 break;
2125         case CTL_ISCSI_TERMINATE:
2126                 cfiscsi_ioctl_terminate(ci);
2127                 break;
2128         case CTL_ISCSI_LOGOUT:
2129                 cfiscsi_ioctl_logout(ci);
2130                 break;
2131 #ifdef ICL_KERNEL_PROXY
2132         case CTL_ISCSI_LISTEN:
2133                 cfiscsi_ioctl_listen(ci);
2134                 break;
2135         case CTL_ISCSI_ACCEPT:
2136                 cfiscsi_ioctl_accept(ci);
2137                 break;
2138         case CTL_ISCSI_SEND:
2139                 cfiscsi_ioctl_send(ci);
2140                 break;
2141         case CTL_ISCSI_RECEIVE:
2142                 cfiscsi_ioctl_receive(ci);
2143                 break;
2144 #else
2145         case CTL_ISCSI_LISTEN:
2146         case CTL_ISCSI_ACCEPT:
2147         case CTL_ISCSI_SEND:
2148         case CTL_ISCSI_RECEIVE:
2149                 ci->status = CTL_ISCSI_ERROR;
2150                 snprintf(ci->error_str, sizeof(ci->error_str),
2151                     "%s: CTL compiled without ICL_KERNEL_PROXY",
2152                     __func__);
2153                 break;
2154 #endif /* !ICL_KERNEL_PROXY */
2155         default:
2156                 ci->status = CTL_ISCSI_ERROR;
2157                 snprintf(ci->error_str, sizeof(ci->error_str),
2158                     "%s: invalid iSCSI request type %d", __func__, ci->type);
2159                 break;
2160         }
2161
2162         return (0);
2163 }
2164
2165 static void
2166 cfiscsi_target_hold(struct cfiscsi_target *ct)
2167 {
2168
2169         refcount_acquire(&ct->ct_refcount);
2170 }
2171
2172 static void
2173 cfiscsi_target_release(struct cfiscsi_target *ct)
2174 {
2175         struct cfiscsi_softc *softc;
2176
2177         softc = ct->ct_softc;
2178         mtx_lock(&softc->lock);
2179         if (refcount_release(&ct->ct_refcount)) {
2180                 TAILQ_REMOVE(&softc->targets, ct, ct_next);
2181                 mtx_unlock(&softc->lock);
2182                 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) {
2183                         ct->ct_state = CFISCSI_TARGET_STATE_INVALID;
2184                         if (ctl_port_deregister(&ct->ct_port) != 0)
2185                                 printf("%s: ctl_port_deregister() failed\n",
2186                                     __func__);
2187                 }
2188                 free(ct, M_CFISCSI);
2189
2190                 return;
2191         }
2192         mtx_unlock(&softc->lock);
2193 }
2194
2195 static struct cfiscsi_target *
2196 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name)
2197 {
2198         struct cfiscsi_target *ct;
2199
2200         mtx_lock(&softc->lock);
2201         TAILQ_FOREACH(ct, &softc->targets, ct_next) {
2202                 if (strcmp(name, ct->ct_name) != 0 ||
2203                     ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE)
2204                         continue;
2205                 cfiscsi_target_hold(ct);
2206                 mtx_unlock(&softc->lock);
2207                 return (ct);
2208         }
2209         mtx_unlock(&softc->lock);
2210
2211         return (NULL);
2212 }
2213
2214 static struct cfiscsi_target *
2215 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name,
2216     const char *alias)
2217 {
2218         struct cfiscsi_target *ct, *newct;
2219         int i;
2220
2221         if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN)
2222                 return (NULL);
2223
2224         newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO);
2225
2226         mtx_lock(&softc->lock);
2227         TAILQ_FOREACH(ct, &softc->targets, ct_next) {
2228                 if (strcmp(name, ct->ct_name) != 0 ||
2229                     ct->ct_state == CFISCSI_TARGET_STATE_INVALID)
2230                         continue;
2231                 cfiscsi_target_hold(ct);
2232                 mtx_unlock(&softc->lock);
2233                 free(newct, M_CFISCSI);
2234                 return (ct);
2235         }
2236
2237         for (i = 0; i < CTL_MAX_LUNS; i++)
2238                 newct->ct_luns[i] = UINT32_MAX;
2239
2240         strlcpy(newct->ct_name, name, sizeof(newct->ct_name));
2241         if (alias != NULL)
2242                 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias));
2243         refcount_init(&newct->ct_refcount, 1);
2244         newct->ct_softc = softc;
2245         TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next);
2246         mtx_unlock(&softc->lock);
2247
2248         return (newct);
2249 }
2250
2251 /*
2252  * Takes LUN from the target space and returns LUN from the CTL space.
2253  */
2254 static uint32_t
2255 cfiscsi_lun_map(void *arg, uint32_t lun)
2256 {
2257         struct cfiscsi_target *ct = arg;
2258
2259         if (lun >= CTL_MAX_LUNS) {
2260                 CFISCSI_DEBUG("requested lun number %d is higher "
2261                     "than maximum %d", lun, CTL_MAX_LUNS - 1);
2262                 return (UINT32_MAX);
2263         }
2264         return (ct->ct_luns[lun]);
2265 }
2266
2267 static int
2268 cfiscsi_target_set_lun(struct cfiscsi_target *ct,
2269     unsigned long lun_id, unsigned long ctl_lun_id)
2270 {
2271
2272         if (lun_id >= CTL_MAX_LUNS) {
2273                 CFISCSI_WARN("requested lun number %ld is higher "
2274                     "than maximum %d", lun_id, CTL_MAX_LUNS - 1);
2275                 return (-1);
2276         }
2277
2278         if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) {
2279                 /*
2280                  * CTL calls cfiscsi_lun_enable() twice for each LUN - once
2281                  * when the LUN is created, and a second time just before
2282                  * the port is brought online; don't emit warnings
2283                  * for that case.
2284                  */
2285                 if (ct->ct_luns[lun_id] == ctl_lun_id)
2286                         return (0);
2287                 CFISCSI_WARN("lun %ld already allocated", lun_id);
2288                 return (-1);
2289         }
2290
2291 #if 0
2292         CFISCSI_DEBUG("adding mapping for lun %ld, target %s "
2293             "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id);
2294 #endif
2295
2296         ct->ct_luns[lun_id] = ctl_lun_id;
2297
2298         return (0);
2299 }
2300
2301 static int
2302 cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id)
2303 {
2304         struct cfiscsi_softc *softc;
2305         struct cfiscsi_target *ct;
2306         const char *target = NULL;
2307         const char *lun = NULL;
2308         unsigned long tmp;
2309
2310         ct = (struct cfiscsi_target *)arg;
2311         softc = ct->ct_softc;
2312
2313         target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options,
2314             "cfiscsi_target");
2315         lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options,
2316             "cfiscsi_lun");
2317
2318         if (target == NULL && lun == NULL)
2319                 return (0);
2320
2321         if (target == NULL || lun == NULL) {
2322                 CFISCSI_WARN("lun added with cfiscsi_target, but without "
2323                     "cfiscsi_lun, or the other way around; ignoring");
2324                 return (0);
2325         }
2326
2327         if (strcmp(target, ct->ct_name) != 0)
2328                 return (0);
2329
2330         tmp = strtoul(lun, NULL, 10);
2331         cfiscsi_target_set_lun(ct, tmp, lun_id);
2332         return (0);
2333 }
2334
2335 static int
2336 cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id)
2337 {
2338         struct cfiscsi_softc *softc;
2339         struct cfiscsi_target *ct;
2340         int i;
2341
2342         ct = (struct cfiscsi_target *)arg;
2343         softc = ct->ct_softc;
2344
2345         mtx_lock(&softc->lock);
2346         for (i = 0; i < CTL_MAX_LUNS; i++) {
2347                 if (ct->ct_luns[i] != lun_id)
2348                         continue;
2349                 ct->ct_luns[i] = UINT32_MAX;
2350                 break;
2351         }
2352         mtx_unlock(&softc->lock);
2353         return (0);
2354 }
2355
2356 static void
2357 cfiscsi_datamove_in(union ctl_io *io)
2358 {
2359         struct cfiscsi_session *cs;
2360         struct icl_pdu *request, *response;
2361         const struct iscsi_bhs_scsi_command *bhssc;
2362         struct iscsi_bhs_data_in *bhsdi;
2363         struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
2364         size_t len, expected_len, sg_len, buffer_offset;
2365         const char *sg_addr;
2366         int ctl_sg_count, error, i;
2367
2368         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2369         cs = PDU_SESSION(request);
2370
2371         bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs;
2372         KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2373             ISCSI_BHS_OPCODE_SCSI_COMMAND,
2374             ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND"));
2375
2376         if (io->scsiio.kern_sg_entries > 0) {
2377                 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
2378                 ctl_sg_count = io->scsiio.kern_sg_entries;
2379         } else {
2380                 ctl_sglist = &ctl_sg_entry;
2381                 ctl_sglist->addr = io->scsiio.kern_data_ptr;
2382                 ctl_sglist->len = io->scsiio.kern_data_len;
2383                 ctl_sg_count = 1;
2384         }
2385
2386         /*
2387          * This is the total amount of data to be transferred within the current
2388          * SCSI command.  We need to record it so that we can properly report
2389          * underflow/underflow.
2390          */
2391         PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len;
2392
2393         /*
2394          * This is the offset within the current SCSI command; for the first
2395          * call to cfiscsi_datamove() it will be 0, and for subsequent ones
2396          * it will be the sum of lengths of previous ones.
2397          */
2398         buffer_offset = io->scsiio.kern_rel_offset;
2399
2400         /*
2401          * This is the transfer length expected by the initiator.  In theory,
2402          * it could be different from the correct amount of data from the SCSI
2403          * point of view, even if that doesn't make any sense.
2404          */
2405         expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length);
2406 #if 0
2407         if (expected_len != io->scsiio.kern_total_len) {
2408                 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, "
2409                     "actual length %zd", expected_len,
2410                     (size_t)io->scsiio.kern_total_len);
2411         }
2412 #endif
2413
2414         if (buffer_offset >= expected_len) {
2415 #if 0
2416                 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, "
2417                     "already sent the expected len", buffer_offset);
2418 #endif
2419                 io->scsiio.be_move_done(io);
2420                 return;
2421         }
2422
2423         i = 0;
2424         sg_addr = NULL;
2425         sg_len = 0;
2426         response = NULL;
2427         bhsdi = NULL;
2428         for (;;) {
2429                 if (response == NULL) {
2430                         response = cfiscsi_pdu_new_response(request, M_NOWAIT);
2431                         if (response == NULL) {
2432                                 CFISCSI_SESSION_WARN(cs, "failed to "
2433                                     "allocate memory; dropping connection");
2434                                 ctl_set_busy(&io->scsiio);
2435                                 io->scsiio.be_move_done(io);
2436                                 cfiscsi_session_terminate(cs);
2437                                 return;
2438                         }
2439                         bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs;
2440                         bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN;
2441                         bhsdi->bhsdi_initiator_task_tag =
2442                             bhssc->bhssc_initiator_task_tag;
2443                         bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request));
2444                         PDU_EXPDATASN(request)++;
2445                         bhsdi->bhsdi_buffer_offset = htonl(buffer_offset);
2446                 }
2447
2448                 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count"));
2449                 if (sg_len == 0) {
2450                         sg_addr = ctl_sglist[i].addr;
2451                         sg_len = ctl_sglist[i].len;
2452                         KASSERT(sg_len > 0, ("sg_len <= 0"));
2453                 }
2454
2455                 len = sg_len;
2456
2457                 /*
2458                  * Truncate to maximum data segment length.
2459                  */
2460                 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length,
2461                     ("ip_data_len %zd >= max_data_segment_length %zd",
2462                     response->ip_data_len, cs->cs_max_data_segment_length));
2463                 if (response->ip_data_len + len >
2464                     cs->cs_max_data_segment_length) {
2465                         len = cs->cs_max_data_segment_length -
2466                             response->ip_data_len;
2467                         KASSERT(len <= sg_len, ("len %zd > sg_len %zd",
2468                             len, sg_len));
2469                 }
2470
2471                 /*
2472                  * Truncate to expected data transfer length.
2473                  */
2474                 KASSERT(buffer_offset + response->ip_data_len < expected_len,
2475                     ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd",
2476                     buffer_offset, response->ip_data_len, expected_len));
2477                 if (buffer_offset + response->ip_data_len + len > expected_len) {
2478                         CFISCSI_SESSION_DEBUG(cs, "truncating from %zd "
2479                             "to expected data transfer length %zd",
2480                             buffer_offset + response->ip_data_len + len, expected_len);
2481                         len = expected_len - (buffer_offset + response->ip_data_len);
2482                         KASSERT(len <= sg_len, ("len %zd > sg_len %zd",
2483                             len, sg_len));
2484                 }
2485
2486                 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT);
2487                 if (error != 0) {
2488                         CFISCSI_SESSION_WARN(cs, "failed to "
2489                             "allocate memory; dropping connection");
2490                         icl_pdu_free(response);
2491                         ctl_set_busy(&io->scsiio);
2492                         io->scsiio.be_move_done(io);
2493                         cfiscsi_session_terminate(cs);
2494                         return;
2495                 }
2496                 sg_addr += len;
2497                 sg_len -= len;
2498
2499                 KASSERT(buffer_offset + request->ip_data_len <= expected_len,
2500                     ("buffer_offset %zd + ip_data_len %zd > expected_len %zd",
2501                     buffer_offset, request->ip_data_len, expected_len));
2502                 if (buffer_offset + request->ip_data_len == expected_len) {
2503                         /*
2504                          * Already have the amount of data the initiator wanted.
2505                          */
2506                         break;
2507                 }
2508
2509                 if (sg_len == 0) {
2510                         /*
2511                          * End of scatter-gather segment;
2512                          * proceed to the next one...
2513                          */
2514                         if (i == ctl_sg_count - 1) {
2515                                 /*
2516                                  * ... unless this was the last one.
2517                                  */
2518                                 break;
2519                         }
2520                         i++;
2521                 }
2522
2523                 if (response->ip_data_len == cs->cs_max_data_segment_length) {
2524                         /*
2525                          * Can't stuff more data into the current PDU;
2526                          * queue it.  Note that's not enough to check
2527                          * for kern_data_resid == 0 instead; there
2528                          * may be several Data-In PDUs for the final
2529                          * call to cfiscsi_datamove(), and we want
2530                          * to set the F flag only on the last of them.
2531                          */
2532                         buffer_offset += response->ip_data_len;
2533                         if (buffer_offset == io->scsiio.kern_total_len ||
2534                             buffer_offset == expected_len)
2535                                 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F;
2536                         cfiscsi_pdu_queue(response);
2537                         response = NULL;
2538                         bhsdi = NULL;
2539                 }
2540         }
2541         if (response != NULL) {
2542                 buffer_offset += response->ip_data_len;
2543                 if (buffer_offset == io->scsiio.kern_total_len ||
2544                     buffer_offset == expected_len)
2545                         bhsdi->bhsdi_flags |= BHSDI_FLAGS_F;
2546                 KASSERT(response->ip_data_len > 0, ("sending empty Data-In"));
2547                 cfiscsi_pdu_queue(response);
2548         }
2549
2550         io->scsiio.be_move_done(io);
2551 }
2552
2553 static void
2554 cfiscsi_datamove_out(union ctl_io *io)
2555 {
2556         struct cfiscsi_session *cs;
2557         struct icl_pdu *request, *response;
2558         const struct iscsi_bhs_scsi_command *bhssc;
2559         struct iscsi_bhs_r2t *bhsr2t;
2560         struct cfiscsi_data_wait *cdw;
2561         uint32_t target_transfer_tag;
2562         bool done;
2563
2564         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2565         cs = PDU_SESSION(request);
2566
2567         bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs;
2568         KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2569             ISCSI_BHS_OPCODE_SCSI_COMMAND,
2570             ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND"));
2571
2572         /*
2573          * We need to record it so that we can properly report
2574          * underflow/underflow.
2575          */
2576         PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len;
2577
2578         /*
2579          * We hadn't received anything during this datamove yet.
2580          */
2581         io->scsiio.ext_data_filled = 0;
2582
2583         target_transfer_tag =
2584             atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1);
2585
2586 #if 0
2587         CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator "
2588             "task tag 0x%x, target transfer tag 0x%x",
2589             bhssc->bhssc_initiator_task_tag, target_transfer_tag);
2590 #endif
2591         cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO);
2592         if (cdw == NULL) {
2593                 CFISCSI_SESSION_WARN(cs, "failed to "
2594                     "allocate memory; dropping connection");
2595                 ctl_set_busy(&io->scsiio);
2596                 io->scsiio.be_move_done(io);
2597                 cfiscsi_session_terminate(cs);
2598                 return;
2599         }
2600         cdw->cdw_ctl_io = io;
2601         cdw->cdw_target_transfer_tag = target_transfer_tag;
2602         cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag;
2603
2604         if (cs->cs_immediate_data && io->scsiio.kern_rel_offset <
2605             icl_pdu_data_segment_length(request)) {
2606                 done = cfiscsi_handle_data_segment(request, cdw);
2607                 if (done) {
2608                         uma_zfree(cfiscsi_data_wait_zone, cdw);
2609                         io->scsiio.be_move_done(io);
2610                         return;
2611                 }
2612         }
2613
2614         CFISCSI_SESSION_LOCK(cs);
2615         TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next);
2616         CFISCSI_SESSION_UNLOCK(cs);
2617
2618         /*
2619          * XXX: We should limit the number of outstanding R2T PDUs
2620          *      per task to MaxOutstandingR2T.
2621          */
2622         response = cfiscsi_pdu_new_response(request, M_NOWAIT);
2623         if (response == NULL) {
2624                 CFISCSI_SESSION_WARN(cs, "failed to "
2625                     "allocate memory; dropping connection");
2626                 ctl_set_busy(&io->scsiio);
2627                 io->scsiio.be_move_done(io);
2628                 cfiscsi_session_terminate(cs);
2629                 return;
2630         }
2631         bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs;
2632         bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T;
2633         bhsr2t->bhsr2t_flags = 0x80;
2634         bhsr2t->bhsr2t_lun = bhssc->bhssc_lun;
2635         bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag;
2636         bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag;
2637         /*
2638          * XXX: Here we assume that cfiscsi_datamove() won't ever
2639          *      be running concurrently on several CPUs for a given
2640          *      command.
2641          */
2642         bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request));
2643         PDU_R2TSN(request)++;
2644         /*
2645          * This is the offset within the current SCSI command;
2646          * i.e. for the first call of datamove(), it will be 0,
2647          * and for subsequent ones it will be the sum of lengths
2648          * of previous ones.
2649          *
2650          * The ext_data_filled is to account for unsolicited
2651          * (immediate) data that might have already arrived.
2652          */
2653         bhsr2t->bhsr2t_buffer_offset =
2654             htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled);
2655         /*
2656          * This is the total length (sum of S/G lengths) this call
2657          * to cfiscsi_datamove() is supposed to handle.
2658          *
2659          * XXX: Limit it to MaxBurstLength.
2660          */
2661         bhsr2t->bhsr2t_desired_data_transfer_length =
2662             htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled);
2663         cfiscsi_pdu_queue(response);
2664 }
2665
2666 static void
2667 cfiscsi_datamove(union ctl_io *io)
2668 {
2669
2670         if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN)
2671                 cfiscsi_datamove_in(io);
2672         else
2673                 cfiscsi_datamove_out(io);
2674 }
2675
2676 static void
2677 cfiscsi_scsi_command_done(union ctl_io *io)
2678 {
2679         struct icl_pdu *request, *response;
2680         struct iscsi_bhs_scsi_command *bhssc;
2681         struct iscsi_bhs_scsi_response *bhssr;
2682 #ifdef DIAGNOSTIC
2683         struct cfiscsi_data_wait *cdw;
2684 #endif
2685         struct cfiscsi_session *cs;
2686         uint16_t sense_length;
2687
2688         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2689         cs = PDU_SESSION(request);
2690         bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs;
2691         KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2692             ISCSI_BHS_OPCODE_SCSI_COMMAND,
2693             ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode));
2694
2695         //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x",
2696         //    bhssc->bhssc_initiator_task_tag);
2697
2698 #ifdef DIAGNOSTIC
2699         CFISCSI_SESSION_LOCK(cs);
2700         TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next)
2701                 KASSERT(bhssc->bhssc_initiator_task_tag !=
2702                     cdw->cdw_initiator_task_tag, ("dangling cdw"));
2703         CFISCSI_SESSION_UNLOCK(cs);
2704 #endif
2705
2706         /*
2707          * Do not return status for aborted commands.
2708          * There are exceptions, but none supported by CTL yet.
2709          */
2710         if (io->io_hdr.status == CTL_CMD_ABORTED &&
2711             (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) {
2712                 ctl_free_io(io);
2713                 icl_pdu_free(request);
2714                 return;
2715         }
2716
2717         response = cfiscsi_pdu_new_response(request, M_WAITOK);
2718         bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs;
2719         bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE;
2720         bhssr->bhssr_flags = 0x80;
2721         /*
2722          * XXX: We don't deal with bidirectional under/overflows;
2723          *      does anything actually support those?
2724          */
2725         if (PDU_TOTAL_TRANSFER_LEN(request) <
2726             ntohl(bhssc->bhssc_expected_data_transfer_length)) {
2727                 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW;
2728                 bhssr->bhssr_residual_count =
2729                     htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) -
2730                     PDU_TOTAL_TRANSFER_LEN(request));
2731                 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d",
2732                 //    ntohl(bhssr->bhssr_residual_count));
2733         } else if (PDU_TOTAL_TRANSFER_LEN(request) >
2734             ntohl(bhssc->bhssc_expected_data_transfer_length)) {
2735                 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW;
2736                 bhssr->bhssr_residual_count =
2737                     htonl(PDU_TOTAL_TRANSFER_LEN(request) -
2738                     ntohl(bhssc->bhssc_expected_data_transfer_length));
2739                 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d",
2740                 //    ntohl(bhssr->bhssr_residual_count));
2741         }
2742         bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED;
2743         bhssr->bhssr_status = io->scsiio.scsi_status;
2744         bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag;
2745         bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request));
2746
2747         if (io->scsiio.sense_len > 0) {
2748 #if 0
2749                 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data",
2750                     io->scsiio.sense_len);
2751 #endif
2752                 sense_length = htons(io->scsiio.sense_len);
2753                 icl_pdu_append_data(response,
2754                     &sense_length, sizeof(sense_length), M_WAITOK);
2755                 icl_pdu_append_data(response,
2756                     &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK);
2757         }
2758
2759         ctl_free_io(io);
2760         icl_pdu_free(request);
2761         cfiscsi_pdu_queue(response);
2762 }
2763
2764 static void
2765 cfiscsi_task_management_done(union ctl_io *io)
2766 {
2767         struct icl_pdu *request, *response;
2768         struct iscsi_bhs_task_management_request *bhstmr;
2769         struct iscsi_bhs_task_management_response *bhstmr2;
2770         struct cfiscsi_data_wait *cdw, *tmpcdw;
2771         struct cfiscsi_session *cs;
2772
2773         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2774         cs = PDU_SESSION(request);
2775         bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs;
2776         KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2777             ISCSI_BHS_OPCODE_TASK_REQUEST,
2778             ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode));
2779
2780 #if 0
2781         CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x",
2782             bhstmr->bhstmr_initiator_task_tag,
2783             bhstmr->bhstmr_referenced_task_tag);
2784 #endif
2785
2786         if ((bhstmr->bhstmr_function & ~0x80) ==
2787             BHSTMR_FUNCTION_ABORT_TASK) {
2788                 /*
2789                  * Make sure we no longer wait for Data-Out for this command.
2790                  */
2791                 CFISCSI_SESSION_LOCK(cs);
2792                 TAILQ_FOREACH_SAFE(cdw,
2793                     &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) {
2794                         if (bhstmr->bhstmr_referenced_task_tag !=
2795                             cdw->cdw_initiator_task_tag)
2796                                 continue;
2797
2798 #if 0
2799                         CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task "
2800                             "tag 0x%x", bhstmr->bhstmr_initiator_task_tag);
2801 #endif
2802                         TAILQ_REMOVE(&cs->cs_waiting_for_data_out,
2803                             cdw, cdw_next);
2804                         cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io);
2805                         uma_zfree(cfiscsi_data_wait_zone, cdw);
2806                 }
2807                 CFISCSI_SESSION_UNLOCK(cs);
2808         }
2809
2810         response = cfiscsi_pdu_new_response(request, M_WAITOK);
2811         bhstmr2 = (struct iscsi_bhs_task_management_response *)
2812             response->ip_bhs;
2813         bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE;
2814         bhstmr2->bhstmr_flags = 0x80;
2815         if (io->io_hdr.status == CTL_SUCCESS) {
2816                 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE;
2817         } else {
2818                 /*
2819                  * XXX: How to figure out what exactly went wrong?  iSCSI spec
2820                  *      expects us to provide detailed error, e.g. "Task does
2821                  *      not exist" or "LUN does not exist".
2822                  */
2823                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED");
2824                 bhstmr2->bhstmr_response =
2825                     BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED;
2826         }
2827         bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag;
2828
2829         ctl_free_io(io);
2830         icl_pdu_free(request);
2831         cfiscsi_pdu_queue(response);
2832 }
2833
2834 static void
2835 cfiscsi_done(union ctl_io *io)
2836 {
2837         struct icl_pdu *request;
2838         struct cfiscsi_session *cs;
2839
2840         KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE),
2841                 ("invalid CTL status %#x", io->io_hdr.status));
2842
2843         if (io->io_hdr.io_type == CTL_IO_TASK &&
2844             io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) {
2845                 /*
2846                  * Implicit task termination has just completed; nothing to do.
2847                  */
2848                 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2849                 cs->cs_tasks_aborted = true;
2850                 refcount_release(&cs->cs_outstanding_ctl_pdus);
2851                 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus));
2852                 ctl_free_io(io);
2853                 return;
2854         }
2855
2856         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2857         cs = PDU_SESSION(request);
2858         refcount_release(&cs->cs_outstanding_ctl_pdus);
2859
2860         switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) {
2861         case ISCSI_BHS_OPCODE_SCSI_COMMAND:
2862                 cfiscsi_scsi_command_done(io);
2863                 break;
2864         case ISCSI_BHS_OPCODE_TASK_REQUEST:
2865                 cfiscsi_task_management_done(io);
2866                 break;
2867         default:
2868                 panic("cfiscsi_done called with wrong opcode 0x%x",
2869                     request->ip_bhs->bhs_opcode);
2870         }
2871 }