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/capsicum.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_targ_enable(void *arg, struct ctl_id targ_id);
 153 static int      cfiscsi_targ_disable(void *arg, struct ctl_id targ_id);
 154 static int      cfiscsi_lun_enable(void *arg,
 155                     struct ctl_id target_id, int lun_id);
 156 static int      cfiscsi_lun_disable(void *arg,
 157                     struct ctl_id target_id, int lun_id);
 158 static int      cfiscsi_ioctl(struct cdev *dev,
 159                     u_long cmd, caddr_t addr, int flag, struct thread *td);
 160 static int      cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len);
 161 static void     cfiscsi_datamove(union ctl_io *io);
 162 static void     cfiscsi_done(union ctl_io *io);
 163 static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun);
 164 static bool     cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request);
 165 static void     cfiscsi_pdu_handle_nop_out(struct icl_pdu *request);
 166 static void     cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request);
 167 static void     cfiscsi_pdu_handle_task_request(struct icl_pdu *request);
 168 static void     cfiscsi_pdu_handle_data_out(struct icl_pdu *request);
 169 static void     cfiscsi_pdu_handle_logout_request(struct icl_pdu *request);
 170 static void     cfiscsi_session_terminate(struct cfiscsi_session *cs);
 171 static struct cfiscsi_target    *cfiscsi_target_find(struct cfiscsi_softc
 172                     *softc, const char *name);
 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 int cfiscsi_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 180
 181 static moduledata_t cfiscsi_moduledata = {
 182         "ctlcfiscsi",
 183         cfiscsi_module_event_handler,
 184         NULL
 185 };
 186
 187 DECLARE_MODULE(ctlcfiscsi, cfiscsi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH);
 188 MODULE_VERSION(ctlcfiscsi, 1);
 189 MODULE_DEPEND(ctlcfiscsi, ctl, 1, 1, 1);
 190 MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1);
 191
 192 static struct icl_pdu *
 193 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags)
 194 {
 195
 196         return (icl_pdu_new_bhs(request->ip_conn, flags));
 197 }
 198
 199 static bool
 200 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request)
 201 {
 202         const struct iscsi_bhs_scsi_command *bhssc;
 203         struct cfiscsi_session *cs;
 204         uint32_t cmdsn, expstatsn;
 205
 206         cs = PDU_SESSION(request);
 207
 208         /*
 209          * Every incoming PDU - not just NOP-Out - resets the ping timer.
 210          * The purpose of the timeout is to reset the connection when it stalls;
 211          * we don't want this to happen when NOP-In or NOP-Out ends up delayed
 212          * in some queue.
 213          *
 214          * XXX: Locking?
 215          */
 216         cs->cs_timeout = 0;
 217
 218         /*
 219          * Data-Out PDUs don't contain CmdSN.
 220          */
 221         if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 222             ISCSI_BHS_OPCODE_SCSI_DATA_OUT)
 223                 return (false);
 224
 225         /*
 226          * We're only using fields common for all the request
 227          * (initiator -> target) PDUs.
 228          */
 229         bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs;
 230         cmdsn = ntohl(bhssc->bhssc_cmdsn);
 231         expstatsn = ntohl(bhssc->bhssc_expstatsn);
 232
 233         CFISCSI_SESSION_LOCK(cs);
 234 #if 0
 235         if (expstatsn != cs->cs_statsn) {
 236                 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, "
 237                     "while current StatSN is %d", expstatsn,
 238                     cs->cs_statsn);
 239         }
 240 #endif
 241
 242         /*
 243          * The target MUST silently ignore any non-immediate command outside
 244          * of this range.
 245          */
 246         if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) {
 247                 CFISCSI_SESSION_UNLOCK(cs);
 248                 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, "
 249                     "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn);
 250                 return (true);
 251         }
 252
 253         if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0)
 254                 cs->cs_cmdsn++;
 255
 256         CFISCSI_SESSION_UNLOCK(cs);
 257
 258         return (false);
 259 }
 260
 261 static void
 262 cfiscsi_pdu_handle(struct icl_pdu *request)
 263 {
 264         struct cfiscsi_session *cs;
 265         bool ignore;
 266
 267         cs = PDU_SESSION(request);
 268
 269         ignore = cfiscsi_pdu_update_cmdsn(request);
 270         if (ignore) {
 271                 icl_pdu_free(request);
 272                 return;
 273         }
 274
 275         /*
 276          * Handle the PDU; this includes e.g. receiving the remaining
 277          * part of PDU and submitting the SCSI command to CTL
 278          * or queueing a reply.  The handling routine is responsible
 279          * for freeing the PDU when it's no longer needed.
 280          */
 281         switch (request->ip_bhs->bhs_opcode &
 282             ~ISCSI_BHS_OPCODE_IMMEDIATE) {
 283         case ISCSI_BHS_OPCODE_NOP_OUT:
 284                 cfiscsi_pdu_handle_nop_out(request);
 285                 break;
 286         case ISCSI_BHS_OPCODE_SCSI_COMMAND:
 287                 cfiscsi_pdu_handle_scsi_command(request);
 288                 break;
 289         case ISCSI_BHS_OPCODE_TASK_REQUEST:
 290                 cfiscsi_pdu_handle_task_request(request);
 291                 break;
 292         case ISCSI_BHS_OPCODE_SCSI_DATA_OUT:
 293                 cfiscsi_pdu_handle_data_out(request);
 294                 break;
 295         case ISCSI_BHS_OPCODE_LOGOUT_REQUEST:
 296                 cfiscsi_pdu_handle_logout_request(request);
 297                 break;
 298         default:
 299                 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported "
 300                     "opcode 0x%x; dropping connection",
 301                     request->ip_bhs->bhs_opcode);
 302                 icl_pdu_free(request);
 303                 cfiscsi_session_terminate(cs);
 304         }
 305
 306 }
 307
 308 static void
 309 cfiscsi_receive_callback(struct icl_pdu *request)
 310 {
 311         struct cfiscsi_session *cs;
 312
 313         cs = PDU_SESSION(request);
 314
 315 #ifdef ICL_KERNEL_PROXY
 316         if (cs->cs_waiting_for_ctld || cs->cs_login_phase) {
 317                 if (cs->cs_login_pdu == NULL)
 318                         cs->cs_login_pdu = request;
 319                 else
 320                         icl_pdu_free(request);
 321                 cv_signal(&cs->cs_login_cv);
 322                 return;
 323         }
 324 #endif
 325
 326         cfiscsi_pdu_handle(request);
 327 }
 328
 329 static void
 330 cfiscsi_error_callback(struct icl_conn *ic)
 331 {
 332         struct cfiscsi_session *cs;
 333
 334         cs = CONN_SESSION(ic);
 335
 336         CFISCSI_SESSION_WARN(cs, "connection error; dropping connection");
 337         cfiscsi_session_terminate(cs);
 338 }
 339
 340 static int
 341 cfiscsi_pdu_prepare(struct icl_pdu *response)
 342 {
 343         struct cfiscsi_session *cs;
 344         struct iscsi_bhs_scsi_response *bhssr;
 345         bool advance_statsn = true;
 346
 347         cs = PDU_SESSION(response);
 348
 349         CFISCSI_SESSION_LOCK_ASSERT(cs);
 350
 351         /*
 352          * We're only using fields common for all the response
 353          * (target -> initiator) PDUs.
 354          */
 355         bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs;
 356
 357         /*
 358          * 10.8.3: "The StatSN for this connection is not advanced
 359          * after this PDU is sent."
 360          */
 361         if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T)
 362                 advance_statsn = false;
 363
 364         /*
 365          * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff,
 366          * StatSN for the connection is not advanced after this PDU is sent."
 367          */
 368         if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN &&
 369             bhssr->bhssr_initiator_task_tag == 0xffffffff)
 370                 advance_statsn = false;
 371
 372         /*
 373          * See the comment below - StatSN is not meaningful and must
 374          * not be advanced.
 375          */
 376         if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN)
 377                 advance_statsn = false;
 378
 379         /*
 380          * 10.7.3: "The fields StatSN, Status, and Residual Count
 381          * only have meaningful content if the S bit is set to 1."
 382          */
 383         if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN)
 384                 bhssr->bhssr_statsn = htonl(cs->cs_statsn);
 385         bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn);
 386         bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta);
 387
 388         if (advance_statsn)
 389                 cs->cs_statsn++;
 390
 391         return (0);
 392 }
 393
 394 static void
 395 cfiscsi_pdu_queue(struct icl_pdu *response)
 396 {
 397         struct cfiscsi_session *cs;
 398
 399         cs = PDU_SESSION(response);
 400
 401         CFISCSI_SESSION_LOCK(cs);
 402         cfiscsi_pdu_prepare(response);
 403         icl_pdu_queue(response);
 404         CFISCSI_SESSION_UNLOCK(cs);
 405 }
 406
 407 static uint32_t
 408 cfiscsi_decode_lun(uint64_t encoded)
 409 {
 410         uint8_t lun[8];
 411         uint32_t result;
 412
 413         /*
 414          * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number,
 415          * but is in fact an evil, multidimensional structure defined
 416          * in SCSI Architecture Model 5 (SAM-5), section 4.6.
 417          */
 418         memcpy(lun, &encoded, sizeof(lun));
 419         switch (lun[0] & 0xC0) {
 420         case 0x00:
 421                 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 ||
 422                     lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) {
 423                         CFISCSI_WARN("malformed LUN "
 424                             "(peripheral device addressing method): 0x%jx",
 425                             (uintmax_t)encoded);
 426                         result = 0xffffffff;
 427                         break;
 428                 }
 429                 result = lun[1];
 430                 break;
 431         case 0x40:
 432                 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 ||
 433                     lun[6] != 0 || lun[7] != 0) {
 434                         CFISCSI_WARN("malformed LUN "
 435                             "(flat address space addressing method): 0x%jx",
 436                             (uintmax_t)encoded);
 437                         result = 0xffffffff;
 438                         break;
 439                 }
 440                 result = ((lun[0] & 0x3f) << 8) + lun[1];
 441                 break;
 442         case 0xC0:
 443                 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 ||
 444                     lun[6] != 0 || lun[7] != 0) {
 445                         CFISCSI_WARN("malformed LUN (extended flat "
 446                             "address space addressing method): 0x%jx",
 447                             (uintmax_t)encoded);
 448                         result = 0xffffffff;
 449                         break;
 450                 }
 451                 result = (lun[1] << 16) + (lun[2] << 8) + lun[3];
 452         default:
 453                 CFISCSI_WARN("unsupported LUN format 0x%jx",
 454                     (uintmax_t)encoded);
 455                 result = 0xffffffff;
 456                 break;
 457         }
 458
 459         return (result);
 460 }
 461
 462 static void
 463 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request)
 464 {
 465         struct cfiscsi_session *cs;
 466         struct iscsi_bhs_nop_out *bhsno;
 467         struct iscsi_bhs_nop_in *bhsni;
 468         struct icl_pdu *response;
 469         void *data = NULL;
 470         size_t datasize;
 471         int error;
 472
 473         cs = PDU_SESSION(request);
 474         bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs;
 475
 476         if (bhsno->bhsno_initiator_task_tag == 0xffffffff) {
 477                 /*
 478                  * Nothing to do, iscsi_pdu_update_statsn() already
 479                  * zeroed the timeout.
 480                  */
 481                 icl_pdu_free(request);
 482                 return;
 483         }
 484
 485         datasize = icl_pdu_data_segment_length(request);
 486         if (datasize > 0) {
 487                 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO);
 488                 if (data == NULL) {
 489                         CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
 490                             "dropping connection");
 491                         icl_pdu_free(request);
 492                         cfiscsi_session_terminate(cs);
 493                         return;
 494                 }
 495                 icl_pdu_get_data(request, 0, data, datasize);
 496         }
 497
 498         response = cfiscsi_pdu_new_response(request, M_NOWAIT);
 499         if (response == NULL) {
 500                 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
 501                     "droppping connection");
 502                 free(data, M_CFISCSI);
 503                 icl_pdu_free(request);
 504                 cfiscsi_session_terminate(cs);
 505                 return;
 506         }
 507         bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs;
 508         bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN;
 509         bhsni->bhsni_flags = 0x80;
 510         bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag;
 511         bhsni->bhsni_target_transfer_tag = 0xffffffff;
 512         if (datasize > 0) {
 513                 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT);
 514                 if (error != 0) {
 515                         CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
 516                             "dropping connection");
 517                         free(data, M_CFISCSI);
 518                         icl_pdu_free(request);
 519                         icl_pdu_free(response);
 520                         cfiscsi_session_terminate(cs);
 521                         return;
 522                 }
 523                 free(data, M_CFISCSI);
 524         }
 525
 526         icl_pdu_free(request);
 527         cfiscsi_pdu_queue(response);
 528 }
 529
 530 static void
 531 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request)
 532 {
 533         struct iscsi_bhs_scsi_command *bhssc;
 534         struct cfiscsi_session *cs;
 535         union ctl_io *io;
 536         int error;
 537
 538         cs = PDU_SESSION(request);
 539         bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs;
 540         //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x",
 541         //    bhssc->bhssc_initiator_task_tag);
 542
 543         if (request->ip_data_len > 0 && cs->cs_immediate_data == false) {
 544                 CFISCSI_SESSION_WARN(cs, "unsolicited data with "
 545                     "ImmediateData=No; dropping connection");
 546                 icl_pdu_free(request);
 547                 cfiscsi_session_terminate(cs);
 548                 return;
 549         }
 550         io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref);
 551         if (io == NULL) {
 552                 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; "
 553                     "dropping connection");
 554                 icl_pdu_free(request);
 555                 cfiscsi_session_terminate(cs);
 556                 return;
 557         }
 558         ctl_zero_io(io);
 559         io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request;
 560         io->io_hdr.io_type = CTL_IO_SCSI;
 561         io->io_hdr.nexus.initid.id = cs->cs_ctl_initid;
 562         io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port;
 563         io->io_hdr.nexus.targ_target.id = 0;
 564         io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun);
 565         io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun;
 566         io->io_hdr.nexus.lun_map_arg = cs;
 567         io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag;
 568         switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) {
 569         case BHSSC_FLAGS_ATTR_UNTAGGED:
 570                 io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 571                 break;
 572         case BHSSC_FLAGS_ATTR_SIMPLE:
 573                 io->scsiio.tag_type = CTL_TAG_SIMPLE;
 574                 break;
 575         case BHSSC_FLAGS_ATTR_ORDERED:
 576                 io->scsiio.tag_type = CTL_TAG_ORDERED;
 577                 break;
 578         case BHSSC_FLAGS_ATTR_HOQ:
 579                 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 580                 break;
 581         case BHSSC_FLAGS_ATTR_ACA:
 582                 io->scsiio.tag_type = CTL_TAG_ACA;
 583                 break;
 584         default:
 585                 io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 586                 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d",
 587                     bhssc->bhssc_flags & BHSSC_FLAGS_ATTR);
 588                 break;
 589         }
 590         io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */
 591         memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb));
 592         refcount_acquire(&cs->cs_outstanding_ctl_pdus);
 593         error = ctl_queue(io);
 594         if (error != CTL_RETVAL_COMPLETE) {
 595                 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; "
 596                     "dropping connection", error);
 597                 ctl_free_io(io);
 598                 refcount_release(&cs->cs_outstanding_ctl_pdus);
 599                 icl_pdu_free(request);
 600                 cfiscsi_session_terminate(cs);
 601         }
 602 }
 603
 604 static void
 605 cfiscsi_pdu_handle_task_request(struct icl_pdu *request)
 606 {
 607         struct iscsi_bhs_task_management_request *bhstmr;
 608         struct iscsi_bhs_task_management_response *bhstmr2;
 609         struct icl_pdu *response;
 610         struct cfiscsi_session *cs;
 611         union ctl_io *io;
 612         int error;
 613
 614         cs = PDU_SESSION(request);
 615         bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs;
 616         io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref);
 617         if (io == NULL) {
 618                 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;"
 619                     "dropping connection");
 620                 icl_pdu_free(request);
 621                 cfiscsi_session_terminate(cs);
 622                 return;
 623         }
 624         ctl_zero_io(io);
 625         io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request;
 626         io->io_hdr.io_type = CTL_IO_TASK;
 627         io->io_hdr.nexus.initid.id = cs->cs_ctl_initid;
 628         io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port;
 629         io->io_hdr.nexus.targ_target.id = 0;
 630         io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun);
 631         io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun;
 632         io->io_hdr.nexus.lun_map_arg = cs;
 633         io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */
 634
 635         switch (bhstmr->bhstmr_function & ~0x80) {
 636         case BHSTMR_FUNCTION_ABORT_TASK:
 637 #if 0
 638                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK");
 639 #endif
 640                 io->taskio.task_action = CTL_TASK_ABORT_TASK;
 641                 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag;
 642                 break;
 643         case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET:
 644 #if 0
 645                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET");
 646 #endif
 647                 io->taskio.task_action = CTL_TASK_LUN_RESET;
 648                 break;
 649         case BHSTMR_FUNCTION_TARGET_WARM_RESET:
 650 #if 0
 651                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET");
 652 #endif
 653                 io->taskio.task_action = CTL_TASK_TARGET_RESET;
 654                 break;
 655         default:
 656                 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x",
 657                     bhstmr->bhstmr_function & ~0x80);
 658                 ctl_free_io(io);
 659
 660                 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
 661                 if (response == NULL) {
 662                         CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
 663                             "dropping connection");
 664                         icl_pdu_free(request);
 665                         cfiscsi_session_terminate(cs);
 666                         return;
 667                 }
 668                 bhstmr2 = (struct iscsi_bhs_task_management_response *)
 669                     response->ip_bhs;
 670                 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE;
 671                 bhstmr2->bhstmr_flags = 0x80;
 672                 bhstmr2->bhstmr_response =
 673                     BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED;
 674                 bhstmr2->bhstmr_initiator_task_tag =
 675                     bhstmr->bhstmr_initiator_task_tag;
 676                 icl_pdu_free(request);
 677                 cfiscsi_pdu_queue(response);
 678                 return;
 679         }
 680
 681         refcount_acquire(&cs->cs_outstanding_ctl_pdus);
 682         error = ctl_queue(io);
 683         if (error != CTL_RETVAL_COMPLETE) {
 684                 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; "
 685                     "dropping connection", error);
 686                 ctl_free_io(io);
 687                 refcount_release(&cs->cs_outstanding_ctl_pdus);
 688                 icl_pdu_free(request);
 689                 cfiscsi_session_terminate(cs);
 690         }
 691 }
 692
 693 static bool
 694 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw)
 695 {
 696         struct iscsi_bhs_data_out *bhsdo;
 697         struct cfiscsi_session *cs;
 698         struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
 699         size_t copy_len, len, off, buffer_offset;
 700         int ctl_sg_count;
 701         union ctl_io *io;
 702
 703         cs = PDU_SESSION(request);
 704
 705         KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 706             ISCSI_BHS_OPCODE_SCSI_DATA_OUT ||
 707             (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 708             ISCSI_BHS_OPCODE_SCSI_COMMAND,
 709             ("bad opcode 0x%x", request->ip_bhs->bhs_opcode));
 710
 711         /*
 712          * We're only using fields common for Data-Out and SCSI Command PDUs.
 713          */
 714         bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs;
 715
 716         io = cdw->cdw_ctl_io;
 717         KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN,
 718             ("CTL_FLAG_DATA_IN"));
 719
 720 #if 0
 721         CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d",
 722             request->ip_data_len, io->scsiio.kern_total_len);
 723 #endif
 724
 725         if (io->scsiio.kern_sg_entries > 0) {
 726                 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
 727                 ctl_sg_count = io->scsiio.kern_sg_entries;
 728         } else {
 729                 ctl_sglist = &ctl_sg_entry;
 730                 ctl_sglist->addr = io->scsiio.kern_data_ptr;
 731                 ctl_sglist->len = io->scsiio.kern_data_len;
 732                 ctl_sg_count = 1;
 733         }
 734
 735         if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 736             ISCSI_BHS_OPCODE_SCSI_DATA_OUT)
 737                 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset);
 738         else
 739                 buffer_offset = 0;
 740
 741         /*
 742          * Make sure the offset, as sent by the initiator, matches the offset
 743          * we're supposed to be at in the scatter-gather list.
 744          */
 745         if (buffer_offset !=
 746             io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) {
 747                 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, "
 748                     "expected %zd; dropping connection", buffer_offset,
 749                     (size_t)io->scsiio.kern_rel_offset +
 750                     (size_t)io->scsiio.ext_data_filled);
 751                 ctl_set_data_phase_error(&io->scsiio);
 752                 cfiscsi_session_terminate(cs);
 753                 return (true);
 754         }
 755
 756         /*
 757          * This is the offset within the PDU data segment, as opposed
 758          * to buffer_offset, which is the offset within the task (SCSI
 759          * command).
 760          */
 761         off = 0;
 762         len = icl_pdu_data_segment_length(request);
 763
 764         /*
 765          * Iterate over the scatter/gather segments, filling them with data
 766          * from the PDU data segment.  Note that this can get called multiple
 767          * times for one SCSI command; the cdw structure holds state for the
 768          * scatter/gather list.
 769          */
 770         for (;;) {
 771                 KASSERT(cdw->cdw_sg_index < ctl_sg_count,
 772                     ("cdw->cdw_sg_index >= ctl_sg_count"));
 773                 if (cdw->cdw_sg_len == 0) {
 774                         cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr;
 775                         cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len;
 776                 }
 777                 KASSERT(off <= len, ("len > off"));
 778                 copy_len = len - off;
 779                 if (copy_len > cdw->cdw_sg_len)
 780                         copy_len = cdw->cdw_sg_len;
 781
 782                 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len);
 783                 cdw->cdw_sg_addr += copy_len;
 784                 cdw->cdw_sg_len -= copy_len;
 785                 off += copy_len;
 786                 io->scsiio.ext_data_filled += copy_len;
 787
 788                 if (cdw->cdw_sg_len == 0) {
 789                         /*
 790                          * End of current segment.
 791                          */
 792                         if (cdw->cdw_sg_index == ctl_sg_count - 1) {
 793                                 /*
 794                                  * Last segment in scatter/gather list.
 795                                  */
 796                                 break;
 797                         }
 798                         cdw->cdw_sg_index++;
 799                 }
 800
 801                 if (off == len) {
 802                         /*
 803                          * End of PDU payload.
 804                          */
 805                         break;
 806                 }
 807         }
 808
 809         if (len > off) {
 810                 /*
 811                  * In case of unsolicited data, it's possible that the buffer
 812                  * provided by CTL is smaller than negotiated FirstBurstLength.
 813                  * Just ignore the superfluous data; will ask for them with R2T
 814                  * on next call to cfiscsi_datamove().
 815                  *
 816                  * This obviously can only happen with SCSI Command PDU.
 817                  */
 818                 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 819                     ISCSI_BHS_OPCODE_SCSI_COMMAND) {
 820                         CFISCSI_SESSION_DEBUG(cs, "received too much immediate "
 821                             "data: got %zd bytes, expected %zd",
 822                             icl_pdu_data_segment_length(request), off);
 823                         return (true);
 824                 }
 825
 826                 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, "
 827                     "expected %zd; dropping connection",
 828                     icl_pdu_data_segment_length(request), off);
 829                 ctl_set_data_phase_error(&io->scsiio);
 830                 cfiscsi_session_terminate(cs);
 831                 return (true);
 832         }
 833
 834         if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len &&
 835             (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) {
 836                 CFISCSI_SESSION_WARN(cs, "got the final packet without "
 837                     "the F flag; flags = 0x%x; dropping connection",
 838                     bhsdo->bhsdo_flags);
 839                 ctl_set_data_phase_error(&io->scsiio);
 840                 cfiscsi_session_terminate(cs);
 841                 return (true);
 842         }
 843
 844         if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len &&
 845             (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) {
 846                 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 847                     ISCSI_BHS_OPCODE_SCSI_DATA_OUT) {
 848                         CFISCSI_SESSION_WARN(cs, "got the final packet, but the "
 849                             "transmitted size was %zd bytes instead of %d; "
 850                             "dropping connection",
 851                             (size_t)io->scsiio.ext_data_filled,
 852                             io->scsiio.kern_data_len);
 853                         ctl_set_data_phase_error(&io->scsiio);
 854                         cfiscsi_session_terminate(cs);
 855                         return (true);
 856                 } else {
 857                         /*
 858                          * For SCSI Command PDU, this just means we need to
 859                          * solicit more data by sending R2T.
 860                          */
 861                         return (false);
 862                 }
 863         }
 864
 865         if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) {
 866 #if 0
 867                 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target "
 868                     "transfer tag 0x%x", cdw->cdw_target_transfer_tag);
 869 #endif
 870
 871                 return (true);
 872         }
 873
 874         return (false);
 875 }
 876
 877 static void
 878 cfiscsi_pdu_handle_data_out(struct icl_pdu *request)
 879 {
 880         struct iscsi_bhs_data_out *bhsdo;
 881         struct cfiscsi_session *cs;
 882         struct cfiscsi_data_wait *cdw = NULL;
 883         union ctl_io *io;
 884         bool done;
 885
 886         cs = PDU_SESSION(request);
 887         bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs;
 888
 889         CFISCSI_SESSION_LOCK(cs);
 890         TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) {
 891 #if 0
 892                 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for "
 893                     "ttt 0x%x, itt 0x%x",
 894                     bhsdo->bhsdo_target_transfer_tag,
 895                     bhsdo->bhsdo_initiator_task_tag,
 896                     cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag));
 897 #endif
 898                 if (bhsdo->bhsdo_target_transfer_tag ==
 899                     cdw->cdw_target_transfer_tag)
 900                         break;
 901         }
 902         CFISCSI_SESSION_UNLOCK(cs);
 903         if (cdw == NULL) {
 904                 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag "
 905                     "0x%x, not found; dropping connection",
 906                     bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag);
 907                 icl_pdu_free(request);
 908                 cfiscsi_session_terminate(cs);
 909                 return;
 910         }
 911
 912         io = cdw->cdw_ctl_io;
 913         KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN,
 914             ("CTL_FLAG_DATA_IN"));
 915
 916         done = cfiscsi_handle_data_segment(request, cdw);
 917         if (done) {
 918                 CFISCSI_SESSION_LOCK(cs);
 919                 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next);
 920                 CFISCSI_SESSION_UNLOCK(cs);
 921                 uma_zfree(cfiscsi_data_wait_zone, cdw);
 922                 io->scsiio.be_move_done(io);
 923         }
 924
 925         icl_pdu_free(request);
 926 }
 927
 928 static void
 929 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request)
 930 {
 931         struct iscsi_bhs_logout_request *bhslr;
 932         struct iscsi_bhs_logout_response *bhslr2;
 933         struct icl_pdu *response;
 934         struct cfiscsi_session *cs;
 935
 936         cs = PDU_SESSION(request);
 937         bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs;
 938         switch (bhslr->bhslr_reason & 0x7f) {
 939         case BHSLR_REASON_CLOSE_SESSION:
 940         case BHSLR_REASON_CLOSE_CONNECTION:
 941                 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
 942                 if (response == NULL) {
 943                         CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory");
 944                         icl_pdu_free(request);
 945                         cfiscsi_session_terminate(cs);
 946                         return;
 947                 }
 948                 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs;
 949                 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE;
 950                 bhslr2->bhslr_flags = 0x80;
 951                 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY;
 952                 bhslr2->bhslr_initiator_task_tag =
 953                     bhslr->bhslr_initiator_task_tag;
 954                 icl_pdu_free(request);
 955                 cfiscsi_pdu_queue(response);
 956                 cfiscsi_session_terminate(cs);
 957                 break;
 958         case BHSLR_REASON_REMOVE_FOR_RECOVERY:
 959                 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
 960                 if (response == NULL) {
 961                         CFISCSI_SESSION_WARN(cs,
 962                             "failed to allocate memory; dropping connection");
 963                         icl_pdu_free(request);
 964                         cfiscsi_session_terminate(cs);
 965                         return;
 966                 }
 967                 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs;
 968                 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE;
 969                 bhslr2->bhslr_flags = 0x80;
 970                 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED;
 971                 bhslr2->bhslr_initiator_task_tag =
 972                     bhslr->bhslr_initiator_task_tag;
 973                 icl_pdu_free(request);
 974                 cfiscsi_pdu_queue(response);
 975                 break;
 976         default:
 977                 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection",
 978                     bhslr->bhslr_reason);
 979                 icl_pdu_free(request);
 980                 cfiscsi_session_terminate(cs);
 981                 break;
 982         }
 983 }
 984
 985 static void
 986 cfiscsi_callout(void *context)
 987 {
 988         struct icl_pdu *cp;
 989         struct iscsi_bhs_nop_in *bhsni;
 990         struct cfiscsi_session *cs;
 991
 992         cs = context;
 993
 994         if (cs->cs_terminating)
 995                 return;
 996
 997         callout_schedule(&cs->cs_callout, 1 * hz);
 998
 999         atomic_add_int(&cs->cs_timeout, 1);
1000
1001 #ifdef ICL_KERNEL_PROXY
1002         if (cs->cs_waiting_for_ctld || cs->cs_login_phase) {
1003                 if (cs->cs_timeout > login_timeout) {
1004                         CFISCSI_SESSION_WARN(cs, "login timed out after "
1005                             "%d seconds; dropping connection", cs->cs_timeout);
1006                         cfiscsi_session_terminate(cs);
1007                 }
1008                 return;
1009         }
1010 #endif
1011
1012         if (cs->cs_timeout >= ping_timeout) {
1013                 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; "
1014                     "dropping connection",  ping_timeout);
1015                 cfiscsi_session_terminate(cs);
1016                 return;
1017         }
1018
1019         /*
1020          * If the ping was reset less than one second ago - which means
1021          * that we've received some PDU during the last second - assume
1022          * the traffic flows correctly and don't bother sending a NOP-Out.
1023          *
1024          * (It's 2 - one for one second, and one for incrementing is_timeout
1025          * earlier in this routine.)
1026          */
1027         if (cs->cs_timeout < 2)
1028                 return;
1029
1030         cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT);
1031         if (cp == NULL) {
1032                 CFISCSI_SESSION_WARN(cs, "failed to allocate memory");
1033                 return;
1034         }
1035         bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs;
1036         bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN;
1037         bhsni->bhsni_flags = 0x80;
1038         bhsni->bhsni_initiator_task_tag = 0xffffffff;
1039
1040         cfiscsi_pdu_queue(cp);
1041 }
1042
1043 static void
1044 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs)
1045 {
1046         struct cfiscsi_data_wait *cdw, *tmpcdw;
1047         union ctl_io *io;
1048         int error;
1049
1050 #ifdef notyet
1051         io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref);
1052         if (io == NULL) {
1053                 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io");
1054                 return;
1055         }
1056         ctl_zero_io(io);
1057         io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL;
1058         io->io_hdr.io_type = CTL_IO_TASK;
1059         io->io_hdr.nexus.initid.id = cs->cs_ctl_initid;
1060         io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port;
1061         io->io_hdr.nexus.targ_target.id = 0;
1062         io->io_hdr.nexus.targ_lun = lun;
1063         io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */
1064         io->taskio.task_action = CTL_TASK_ABORT_TASK_SET;
1065         error = ctl_queue(io);
1066         if (error != CTL_RETVAL_COMPLETE) {
1067                 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error);
1068                 ctl_free_io(io);
1069         }
1070 #else
1071         /*
1072          * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead
1073          * just iterate over tasks that are waiting for something - data - and
1074          * terminate those.
1075          */
1076         CFISCSI_SESSION_LOCK(cs);
1077         TAILQ_FOREACH_SAFE(cdw,
1078             &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) {
1079                 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref);
1080                 if (io == NULL) {
1081                         CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io");
1082                         return;
1083                 }
1084                 ctl_zero_io(io);
1085                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL;
1086                 io->io_hdr.io_type = CTL_IO_TASK;
1087                 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid;
1088                 io->io_hdr.nexus.targ_port =
1089                     cs->cs_target->ct_softc->fe.targ_port;
1090                 io->io_hdr.nexus.targ_target.id = 0;
1091                 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */
1092                 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */
1093                 io->taskio.task_action = CTL_TASK_ABORT_TASK;
1094                 io->taskio.tag_num = cdw->cdw_initiator_task_tag;
1095                 error = ctl_queue(io);
1096                 if (error != CTL_RETVAL_COMPLETE) {
1097                         CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error);
1098                         ctl_free_io(io);
1099                         return;
1100                 }
1101 #if 0
1102                 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag "
1103                     "0x%x", cdw->cdw_initiator_task_tag);
1104 #endif
1105                 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io);
1106                 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next);
1107                 uma_zfree(cfiscsi_data_wait_zone, cdw);
1108         }
1109         CFISCSI_SESSION_UNLOCK(cs);
1110 #endif
1111 }
1112
1113 static void
1114 cfiscsi_maintenance_thread(void *arg)
1115 {
1116         struct cfiscsi_session *cs;
1117
1118         cs = arg;
1119
1120         for (;;) {
1121                 CFISCSI_SESSION_LOCK(cs);
1122                 if (cs->cs_terminating == false)
1123                         cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock);
1124                 CFISCSI_SESSION_UNLOCK(cs);
1125
1126                 if (cs->cs_terminating) {
1127                         cfiscsi_session_terminate_tasks(cs);
1128                         callout_drain(&cs->cs_callout);
1129
1130                         icl_conn_shutdown(cs->cs_conn);
1131                         icl_conn_close(cs->cs_conn);
1132
1133                         cs->cs_terminating++;
1134
1135                         /*
1136                          * XXX: We used to wait up to 30 seconds to deliver queued PDUs
1137                          *      to the initiator.  We also tried hard to deliver SCSI Responses
1138                          *      for the aborted PDUs.  We don't do that anymore.  We might need
1139                          *      to revisit that.
1140                          */
1141
1142                         cfiscsi_session_delete(cs);
1143                         kthread_exit();
1144                         return;
1145                 }
1146                 CFISCSI_SESSION_DEBUG(cs, "nothing to do");
1147         }
1148 }
1149
1150 static void
1151 cfiscsi_session_terminate(struct cfiscsi_session *cs)
1152 {
1153
1154         if (cs->cs_terminating != 0)
1155                 return;
1156         cs->cs_terminating = 1;
1157         cv_signal(&cs->cs_maintenance_cv);
1158 #ifdef ICL_KERNEL_PROXY
1159         cv_signal(&cs->cs_login_cv);
1160 #endif
1161 }
1162
1163 static int
1164 cfiscsi_session_register_initiator(struct cfiscsi_session *cs)
1165 {
1166         int error, i;
1167         struct cfiscsi_softc *softc;
1168
1169         KASSERT(cs->cs_ctl_initid == -1, ("already registered"));
1170
1171         softc = &cfiscsi_softc;
1172
1173         mtx_lock(&softc->lock);
1174         for (i = 0; i < softc->max_initiators; i++) {
1175                 if (softc->ctl_initids[i] == 0)
1176                         break;
1177         }
1178         if (i == softc->max_initiators) {
1179                 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)",
1180                     softc->max_initiators);
1181                 mtx_unlock(&softc->lock);
1182                 return (1);
1183         }
1184         softc->ctl_initids[i] = 1;
1185         mtx_unlock(&softc->lock);
1186
1187 #if 0
1188         CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d",
1189             i, softc->max_initiators);
1190 #endif
1191         cs->cs_ctl_initid = i;
1192         error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid);
1193         if (error != 0) {
1194                 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error);
1195                 mtx_lock(&softc->lock);
1196                 softc->ctl_initids[cs->cs_ctl_initid] = 0;
1197                 mtx_unlock(&softc->lock);
1198                 cs->cs_ctl_initid = -1;
1199                 return (1);
1200         }
1201
1202         return (0);
1203 }
1204
1205 static void
1206 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs)
1207 {
1208         int error;
1209         struct cfiscsi_softc *softc;
1210
1211         if (cs->cs_ctl_initid == -1)
1212                 return;
1213
1214         softc = &cfiscsi_softc;
1215
1216         error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid);
1217         if (error != 0) {
1218                 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d",
1219                     error);
1220         }
1221         mtx_lock(&softc->lock);
1222         softc->ctl_initids[cs->cs_ctl_initid] = 0;
1223         mtx_unlock(&softc->lock);
1224         cs->cs_ctl_initid = -1;
1225 }
1226
1227 static struct cfiscsi_session *
1228 cfiscsi_session_new(struct cfiscsi_softc *softc)
1229 {
1230         struct cfiscsi_session *cs;
1231         int error;
1232
1233         cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO);
1234         if (cs == NULL) {
1235                 CFISCSI_WARN("malloc failed");
1236                 return (NULL);
1237         }
1238         cs->cs_ctl_initid = -1;
1239
1240         refcount_init(&cs->cs_outstanding_ctl_pdus, 0);
1241         TAILQ_INIT(&cs->cs_waiting_for_data_out);
1242         mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF);
1243         cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt");
1244 #ifdef ICL_KERNEL_PROXY
1245         cv_init(&cs->cs_login_cv, "cfiscsi_login");
1246 #endif
1247
1248         cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock);
1249         cs->cs_conn->ic_receive = cfiscsi_receive_callback;
1250         cs->cs_conn->ic_error = cfiscsi_error_callback;
1251         cs->cs_conn->ic_prv0 = cs;
1252
1253         error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt");
1254         if (error != 0) {
1255                 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error);
1256                 free(cs, M_CFISCSI);
1257                 return (NULL);
1258         }
1259
1260         mtx_lock(&softc->lock);
1261         cs->cs_id = softc->last_session_id + 1;
1262         softc->last_session_id++;
1263         mtx_unlock(&softc->lock);
1264
1265         mtx_lock(&softc->lock);
1266         TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next);
1267         mtx_unlock(&softc->lock);
1268
1269         /*
1270          * Start pinging the initiator.
1271          */
1272         callout_init(&cs->cs_callout, 1);
1273         callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs);
1274
1275         return (cs);
1276 }
1277
1278 static void
1279 cfiscsi_session_delete(struct cfiscsi_session *cs)
1280 {
1281         struct cfiscsi_softc *softc;
1282
1283         softc = &cfiscsi_softc;
1284
1285         KASSERT(cs->cs_outstanding_ctl_pdus == 0,
1286             ("destroying session with outstanding CTL pdus"));
1287         KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out),
1288             ("destroying session with non-empty queue"));
1289
1290         cfiscsi_session_unregister_initiator(cs);
1291         if (cs->cs_target != NULL)
1292                 cfiscsi_target_release(cs->cs_target);
1293         icl_conn_close(cs->cs_conn);
1294         icl_conn_free(cs->cs_conn);
1295
1296         mtx_lock(&softc->lock);
1297         TAILQ_REMOVE(&softc->sessions, cs, cs_next);
1298         mtx_unlock(&softc->lock);
1299
1300         free(cs, M_CFISCSI);
1301 }
1302
1303 int
1304 cfiscsi_init(void)
1305 {
1306         struct cfiscsi_softc *softc;
1307         struct ctl_frontend *fe;
1308         int retval;
1309
1310         softc = &cfiscsi_softc;
1311         retval = 0;
1312         bzero(softc, sizeof(*softc));
1313         mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF);
1314
1315 #ifdef ICL_KERNEL_PROXY
1316         cv_init(&softc->accept_cv, "cfiscsi_accept");
1317 #endif
1318         TAILQ_INIT(&softc->sessions);
1319         TAILQ_INIT(&softc->targets);
1320
1321         fe = &softc->fe;
1322         fe->port_type = CTL_PORT_ISCSI;
1323         /* XXX KDM what should the real number be here? */
1324         fe->num_requested_ctl_io = 4096;
1325         snprintf(softc->port_name, sizeof(softc->port_name), "iscsi");
1326         fe->port_name = softc->port_name;
1327         fe->port_online = cfiscsi_online;
1328         fe->port_offline = cfiscsi_offline;
1329         fe->onoff_arg = softc;
1330         fe->targ_enable = cfiscsi_targ_enable;
1331         fe->targ_disable = cfiscsi_targ_disable;
1332         fe->lun_enable = cfiscsi_lun_enable;
1333         fe->lun_disable = cfiscsi_lun_disable;
1334         fe->targ_lun_arg = softc;
1335         fe->ioctl = cfiscsi_ioctl;
1336         fe->devid = cfiscsi_devid;
1337         fe->fe_datamove = cfiscsi_datamove;
1338         fe->fe_done = cfiscsi_done;
1339
1340         /* XXX KDM what should we report here? */
1341         /* XXX These should probably be fetched from CTL. */
1342         fe->max_targets = 1;
1343         fe->max_target_id = 15;
1344
1345         retval = ctl_frontend_register(fe, /*master_SC*/ 1);
1346         if (retval != 0) {
1347                 CFISCSI_WARN("ctl_frontend_register() failed with error %d",
1348                     retval);
1349                 retval = 1;
1350                 goto bailout;
1351         }
1352
1353         softc->max_initiators = fe->max_initiators;
1354
1355         cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait",
1356             sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL,
1357             UMA_ALIGN_PTR, 0);
1358
1359         return (0);
1360
1361 bailout:
1362         return (retval);
1363 }
1364
1365 static int
1366 cfiscsi_module_event_handler(module_t mod, int what, void *arg)
1367 {
1368
1369         switch (what) {
1370         case MOD_LOAD:
1371                 return (cfiscsi_init());
1372         case MOD_UNLOAD:
1373                 return (EBUSY);
1374         default:
1375                 return (EOPNOTSUPP);
1376         }
1377 }
1378
1379 #ifdef ICL_KERNEL_PROXY
1380 static void
1381 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id)
1382 {
1383         struct cfiscsi_session *cs;
1384
1385         cs = cfiscsi_session_new(&cfiscsi_softc);
1386         if (cs == NULL) {
1387                 CFISCSI_WARN("failed to create session");
1388                 return;
1389         }
1390
1391         icl_conn_handoff_sock(cs->cs_conn, so);
1392         cs->cs_initiator_sa = sa;
1393         cs->cs_portal_id = portal_id;
1394         cs->cs_waiting_for_ctld = true;
1395         cv_signal(&cfiscsi_softc.accept_cv);
1396 }
1397 #endif
1398
1399 static void
1400 cfiscsi_online(void *arg)
1401 {
1402         struct cfiscsi_softc *softc;
1403
1404         softc = (struct cfiscsi_softc *)arg;
1405
1406         softc->online = 1;
1407 #ifdef ICL_KERNEL_PROXY
1408         if (softc->listener != NULL)
1409                 icl_listen_free(softc->listener);
1410         softc->listener = icl_listen_new(cfiscsi_accept);
1411 #endif
1412 }
1413
1414 static void
1415 cfiscsi_offline(void *arg)
1416 {
1417         struct cfiscsi_softc *softc;
1418         struct cfiscsi_session *cs;
1419
1420         softc = (struct cfiscsi_softc *)arg;
1421
1422         softc->online = 0;
1423
1424         mtx_lock(&softc->lock);
1425         TAILQ_FOREACH(cs, &softc->sessions, cs_next)
1426                 cfiscsi_session_terminate(cs);
1427         mtx_unlock(&softc->lock);
1428
1429 #ifdef ICL_KERNEL_PROXY
1430         icl_listen_free(softc->listener);
1431         softc->listener = NULL;
1432 #endif
1433 }
1434
1435 static int
1436 cfiscsi_targ_enable(void *arg, struct ctl_id targ_id)
1437 {
1438
1439         return (0);
1440 }
1441
1442 static int
1443 cfiscsi_targ_disable(void *arg, struct ctl_id targ_id)
1444 {
1445
1446         return (0);
1447 }
1448
1449 static void
1450 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci)
1451 {
1452         struct cfiscsi_softc *softc;
1453         struct cfiscsi_session *cs;
1454         struct cfiscsi_target *ct;
1455         struct ctl_iscsi_handoff_params *cihp;
1456         int error;
1457
1458         cihp = (struct ctl_iscsi_handoff_params *)&(ci->data);
1459         softc = &cfiscsi_softc;
1460
1461         CFISCSI_DEBUG("new connection from %s (%s) to %s",
1462             cihp->initiator_name, cihp->initiator_addr,
1463             cihp->target_name);
1464
1465         if (softc->online == 0) {
1466                 ci->status = CTL_ISCSI_ERROR;
1467                 snprintf(ci->error_str, sizeof(ci->error_str),
1468                     "%s: port offline", __func__);
1469                 return;
1470         }
1471
1472         ct = cfiscsi_target_find(softc, cihp->target_name);
1473         if (ct == NULL) {
1474                 ci->status = CTL_ISCSI_ERROR;
1475                 snprintf(ci->error_str, sizeof(ci->error_str),
1476                     "%s: target not found", __func__);
1477                 return;
1478         }
1479
1480 #ifdef ICL_KERNEL_PROXY
1481         if (cihp->socket > 0 && cihp->connection_id > 0) {
1482                 snprintf(ci->error_str, sizeof(ci->error_str),
1483                     "both socket and connection_id set");
1484                 ci->status = CTL_ISCSI_ERROR;
1485                 cfiscsi_target_release(ct);
1486                 return;
1487         }
1488         if (cihp->socket == 0) {
1489                 mtx_lock(&cfiscsi_softc.lock);
1490                 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1491                         if (cs->cs_id == cihp->socket)
1492                                 break;
1493                 }
1494                 if (cs == NULL) {
1495                         mtx_unlock(&cfiscsi_softc.lock);
1496                         snprintf(ci->error_str, sizeof(ci->error_str),
1497                             "connection not found");
1498                         ci->status = CTL_ISCSI_ERROR;
1499                         cfiscsi_target_release(ct);
1500                         return;
1501                 }
1502                 mtx_unlock(&cfiscsi_softc.lock);
1503         } else {
1504 #endif
1505                 cs = cfiscsi_session_new(softc);
1506                 if (cs == NULL) {
1507                         ci->status = CTL_ISCSI_ERROR;
1508                         snprintf(ci->error_str, sizeof(ci->error_str),
1509                             "%s: cfiscsi_session_new failed", __func__);
1510                         cfiscsi_target_release(ct);
1511                         return;
1512                 }
1513 #ifdef ICL_KERNEL_PROXY
1514         }
1515 #endif
1516         cs->cs_target = ct;
1517
1518         /*
1519          * First PDU of Full Feature phase has the same CmdSN as the last
1520          * PDU from the Login Phase received from the initiator.  Thus,
1521          * the -1 below.
1522          */
1523         cs->cs_portal_group_tag = cihp->portal_group_tag;
1524         cs->cs_cmdsn = cihp->cmdsn;
1525         cs->cs_statsn = cihp->statsn;
1526         cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length;
1527         cs->cs_max_burst_length = cihp->max_burst_length;
1528         cs->cs_immediate_data = !!cihp->immediate_data;
1529         if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C)
1530                 cs->cs_conn->ic_header_crc32c = true;
1531         if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C)
1532                 cs->cs_conn->ic_data_crc32c = true;
1533
1534         strlcpy(cs->cs_initiator_name,
1535             cihp->initiator_name, sizeof(cs->cs_initiator_name));
1536         strlcpy(cs->cs_initiator_addr,
1537             cihp->initiator_addr, sizeof(cs->cs_initiator_addr));
1538         strlcpy(cs->cs_initiator_alias,
1539             cihp->initiator_alias, sizeof(cs->cs_initiator_alias));
1540
1541 #ifdef ICL_KERNEL_PROXY
1542         if (cihp->socket > 0) {
1543 #endif
1544                 error = icl_conn_handoff(cs->cs_conn, cihp->socket);
1545                 if (error != 0) {
1546                         cfiscsi_session_delete(cs);
1547                         ci->status = CTL_ISCSI_ERROR;
1548                         snprintf(ci->error_str, sizeof(ci->error_str),
1549                             "%s: icl_conn_handoff failed with error %d",
1550                             __func__, error);
1551                         return;
1552                 }
1553 #ifdef ICL_KERNEL_PROXY
1554         }
1555 #endif
1556
1557         /*
1558          * Register initiator with CTL.
1559          */
1560         cfiscsi_session_register_initiator(cs);
1561
1562 #ifdef ICL_KERNEL_PROXY
1563         cs->cs_login_phase = false;
1564
1565         /*
1566          * First PDU of the Full Feature phase has likely already arrived.
1567          * We have to pick it up and execute properly.
1568          */
1569         if (cs->cs_login_pdu != NULL) {
1570                 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU");
1571                 cfiscsi_pdu_handle(cs->cs_login_pdu);
1572                 cs->cs_login_pdu = NULL;
1573         }
1574 #endif
1575
1576         ci->status = CTL_ISCSI_OK;
1577 }
1578
1579 static void
1580 cfiscsi_ioctl_list(struct ctl_iscsi *ci)
1581 {
1582         struct ctl_iscsi_list_params *cilp;
1583         struct cfiscsi_session *cs;
1584         struct cfiscsi_softc *softc;
1585         struct sbuf *sb;
1586         int error;
1587
1588         cilp = (struct ctl_iscsi_list_params *)&(ci->data);
1589         softc = &cfiscsi_softc;
1590
1591         sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN);
1592         if (sb == NULL) {
1593                 ci->status = CTL_ISCSI_ERROR;
1594                 snprintf(ci->error_str, sizeof(ci->error_str),
1595                     "Unable to allocate %d bytes for iSCSI session list",
1596                     cilp->alloc_len);
1597                 return;
1598         }
1599
1600         sbuf_printf(sb, "<ctlislist>\n");
1601         mtx_lock(&softc->lock);
1602         TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1603 #ifdef ICL_KERNEL_PROXY
1604                 if (cs->cs_target == NULL)
1605                         continue;
1606 #endif
1607                 error = sbuf_printf(sb, "<connection id=\"%d\">"
1608                     "<initiator>%s</initiator>"
1609                     "<initiator_addr>%s</initiator_addr>"
1610                     "<initiator_alias>%s</initiator_alias>"
1611                     "<target>%s</target>"
1612                     "<target_alias>%s</target_alias>"
1613                     "<header_digest>%s</header_digest>"
1614                     "<data_digest>%s</data_digest>"
1615                     "<max_data_segment_length>%zd</max_data_segment_length>"
1616                     "<immediate_data>%d</immediate_data>"
1617                     "<iser>%d</iser>"
1618                     "</connection>\n",
1619                     cs->cs_id,
1620                     cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias,
1621                     cs->cs_target->ct_name, cs->cs_target->ct_alias,
1622                     cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None",
1623                     cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None",
1624                     cs->cs_max_data_segment_length,
1625                     cs->cs_immediate_data,
1626                     cs->cs_conn->ic_iser);
1627                 if (error != 0)
1628                         break;
1629         }
1630         mtx_unlock(&softc->lock);
1631         error = sbuf_printf(sb, "</ctlislist>\n");
1632         if (error != 0) {
1633                 sbuf_delete(sb);
1634                 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE;
1635                 snprintf(ci->error_str, sizeof(ci->error_str),
1636                     "Out of space, %d bytes is too small", cilp->alloc_len);
1637                 return;
1638         }
1639         sbuf_finish(sb);
1640
1641         error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1);
1642         cilp->fill_len = sbuf_len(sb) + 1;
1643         ci->status = CTL_ISCSI_OK;
1644         sbuf_delete(sb);
1645 }
1646
1647 static void
1648 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci)
1649 {
1650         struct icl_pdu *response;
1651         struct iscsi_bhs_asynchronous_message *bhsam;
1652         struct ctl_iscsi_terminate_params *citp;
1653         struct cfiscsi_session *cs;
1654         struct cfiscsi_softc *softc;
1655         int found = 0;
1656
1657         citp = (struct ctl_iscsi_terminate_params *)&(ci->data);
1658         softc = &cfiscsi_softc;
1659
1660         mtx_lock(&softc->lock);
1661         TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1662                 if (citp->all == 0 && cs->cs_id != citp->connection_id &&
1663                     strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 &&
1664                     strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0)
1665                         continue;
1666
1667                 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT);
1668                 if (response == NULL) {
1669                         /*
1670                          * Oh well.  Just terminate the connection.
1671                          */
1672                 } else {
1673                         bhsam = (struct iscsi_bhs_asynchronous_message *)
1674                             response->ip_bhs;
1675                         bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE;
1676                         bhsam->bhsam_flags = 0x80;
1677                         bhsam->bhsam_0xffffffff = 0xffffffff;
1678                         bhsam->bhsam_async_event =
1679                             BHSAM_EVENT_TARGET_TERMINATES_SESSION;
1680                         cfiscsi_pdu_queue(response);
1681                 }
1682                 cfiscsi_session_terminate(cs);
1683                 found++;
1684         }
1685         mtx_unlock(&softc->lock);
1686
1687         if (found == 0) {
1688                 ci->status = CTL_ISCSI_SESSION_NOT_FOUND;
1689                 snprintf(ci->error_str, sizeof(ci->error_str),
1690                     "No matching connections found");
1691                 return;
1692         }
1693
1694         ci->status = CTL_ISCSI_OK;
1695 }
1696
1697 static void
1698 cfiscsi_ioctl_logout(struct ctl_iscsi *ci)
1699 {
1700         struct icl_pdu *response;
1701         struct iscsi_bhs_asynchronous_message *bhsam;
1702         struct ctl_iscsi_logout_params *cilp;
1703         struct cfiscsi_session *cs;
1704         struct cfiscsi_softc *softc;
1705         int found = 0;
1706
1707         cilp = (struct ctl_iscsi_logout_params *)&(ci->data);
1708         softc = &cfiscsi_softc;
1709
1710         mtx_lock(&softc->lock);
1711         TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1712                 if (cilp->all == 0 && cs->cs_id != cilp->connection_id &&
1713                     strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 &&
1714                     strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0)
1715                         continue;
1716
1717                 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT);
1718                 if (response == NULL) {
1719                         ci->status = CTL_ISCSI_ERROR;
1720                         snprintf(ci->error_str, sizeof(ci->error_str),
1721                             "Unable to allocate memory");
1722                         mtx_unlock(&softc->lock);
1723                         return;
1724                 }
1725                 bhsam =
1726                     (struct iscsi_bhs_asynchronous_message *)response->ip_bhs;
1727                 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE;
1728                 bhsam->bhsam_flags = 0x80;
1729                 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT;
1730                 bhsam->bhsam_parameter3 = htons(10);
1731                 cfiscsi_pdu_queue(response);
1732                 found++;
1733         }
1734         mtx_unlock(&softc->lock);
1735
1736         if (found == 0) {
1737                 ci->status = CTL_ISCSI_SESSION_NOT_FOUND;
1738                 snprintf(ci->error_str, sizeof(ci->error_str),
1739                     "No matching connections found");
1740                 return;
1741         }
1742
1743         ci->status = CTL_ISCSI_OK;
1744 }
1745
1746 #ifdef ICL_KERNEL_PROXY
1747 static void
1748 cfiscsi_ioctl_listen(struct ctl_iscsi *ci)
1749 {
1750         struct ctl_iscsi_listen_params *cilp;
1751         struct sockaddr *sa;
1752         int error;
1753
1754         cilp = (struct ctl_iscsi_listen_params *)&(ci->data);
1755
1756         if (cfiscsi_softc.listener == NULL) {
1757                 CFISCSI_DEBUG("no listener");
1758                 snprintf(ci->error_str, sizeof(ci->error_str), "no listener");
1759                 ci->status = CTL_ISCSI_ERROR;
1760                 return;
1761         }
1762
1763         error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen);
1764         if (error != 0) {
1765                 CFISCSI_DEBUG("getsockaddr, error %d", error);
1766                 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed");
1767                 ci->status = CTL_ISCSI_ERROR;
1768                 return;
1769         }
1770
1771         error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain,
1772             cilp->socktype, cilp->protocol, sa, cilp->portal_id);
1773         if (error != 0) {
1774                 free(sa, M_SONAME);
1775                 CFISCSI_DEBUG("icl_listen_add, error %d", error);
1776                 snprintf(ci->error_str, sizeof(ci->error_str),
1777                     "icl_listen_add failed, error %d", error);
1778                 ci->status = CTL_ISCSI_ERROR;
1779                 return;
1780         }
1781
1782         ci->status = CTL_ISCSI_OK;
1783 }
1784
1785 static void
1786 cfiscsi_ioctl_accept(struct ctl_iscsi *ci)
1787 {
1788         struct ctl_iscsi_accept_params *ciap;
1789         struct cfiscsi_session *cs;
1790         int error;
1791
1792         ciap = (struct ctl_iscsi_accept_params *)&(ci->data);
1793
1794         mtx_lock(&cfiscsi_softc.lock);
1795         for (;;) {
1796                 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1797                         if (cs->cs_waiting_for_ctld)
1798                                 break;
1799                 }
1800                 if (cs != NULL)
1801                         break;
1802                 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock);
1803                 if (error != 0) {
1804                         mtx_unlock(&cfiscsi_softc.lock);
1805                         snprintf(ci->error_str, sizeof(ci->error_str), "interrupted");
1806                         ci->status = CTL_ISCSI_ERROR;
1807                         return;
1808                 }
1809         }
1810         mtx_unlock(&cfiscsi_softc.lock);
1811
1812         cs->cs_waiting_for_ctld = false;
1813         cs->cs_login_phase = true;
1814
1815         ciap->connection_id = cs->cs_id;
1816         ciap->portal_id = cs->cs_portal_id;
1817         ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len;
1818         error = copyout(cs->cs_initiator_sa, ciap->initiator_addr,
1819             cs->cs_initiator_sa->sa_len);
1820         if (error != 0) {
1821                 snprintf(ci->error_str, sizeof(ci->error_str),
1822                     "copyout failed with error %d", error);
1823                 ci->status = CTL_ISCSI_ERROR;
1824                 return;
1825         }
1826
1827         ci->status = CTL_ISCSI_OK;
1828 }
1829
1830 static void
1831 cfiscsi_ioctl_send(struct ctl_iscsi *ci)
1832 {
1833         struct ctl_iscsi_send_params *cisp;
1834         struct cfiscsi_session *cs;
1835         struct icl_pdu *ip;
1836         size_t datalen;
1837         void *data;
1838         int error;
1839
1840         cisp = (struct ctl_iscsi_send_params *)&(ci->data);
1841
1842         mtx_lock(&cfiscsi_softc.lock);
1843         TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1844                 if (cs->cs_id == cisp->connection_id)
1845                         break;
1846         }
1847         if (cs == NULL) {
1848                 mtx_unlock(&cfiscsi_softc.lock);
1849                 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found");
1850                 ci->status = CTL_ISCSI_ERROR;
1851                 return;
1852         }
1853         mtx_unlock(&cfiscsi_softc.lock);
1854
1855 #if 0
1856         if (cs->cs_login_phase == false)
1857                 return (EBUSY);
1858 #endif
1859
1860         if (cs->cs_terminating) {
1861                 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating");
1862                 ci->status = CTL_ISCSI_ERROR;
1863                 return;
1864         }
1865
1866         datalen = cisp->data_segment_len;
1867         /*
1868          * XXX
1869          */
1870         //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) {
1871         if (datalen > 65535) {
1872                 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big");
1873                 ci->status = CTL_ISCSI_ERROR;
1874                 return;
1875         }
1876         if (datalen > 0) {
1877                 data = malloc(datalen, M_CFISCSI, M_WAITOK);
1878                 error = copyin(cisp->data_segment, data, datalen);
1879                 if (error != 0) {
1880                         free(data, M_CFISCSI);
1881                         snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error);
1882                         ci->status = CTL_ISCSI_ERROR;
1883                         return;
1884                 }
1885         }
1886
1887         ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK);
1888         memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs));
1889         if (datalen > 0) {
1890                 icl_pdu_append_data(ip, data, datalen, M_WAITOK);
1891                 free(data, M_CFISCSI);
1892         }
1893         CFISCSI_SESSION_LOCK(cs);
1894         icl_pdu_queue(ip);
1895         CFISCSI_SESSION_UNLOCK(cs);
1896         ci->status = CTL_ISCSI_OK;
1897 }
1898
1899 static void
1900 cfiscsi_ioctl_receive(struct ctl_iscsi *ci)
1901 {
1902         struct ctl_iscsi_receive_params *cirp;
1903         struct cfiscsi_session *cs;
1904         struct icl_pdu *ip;
1905         void *data;
1906         int error;
1907
1908         cirp = (struct ctl_iscsi_receive_params *)&(ci->data);
1909
1910         mtx_lock(&cfiscsi_softc.lock);
1911         TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1912                 if (cs->cs_id == cirp->connection_id)
1913                         break;
1914         }
1915         if (cs == NULL) {
1916                 mtx_unlock(&cfiscsi_softc.lock);
1917                 snprintf(ci->error_str, sizeof(ci->error_str),
1918                     "connection not found");
1919                 ci->status = CTL_ISCSI_ERROR;
1920                 return;
1921         }
1922         mtx_unlock(&cfiscsi_softc.lock);
1923
1924 #if 0
1925         if (is->is_login_phase == false)
1926                 return (EBUSY);
1927 #endif
1928
1929         CFISCSI_SESSION_LOCK(cs);
1930         while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) {
1931                 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock);
1932                 if (error != 0) {
1933                         CFISCSI_SESSION_UNLOCK(cs);
1934                         snprintf(ci->error_str, sizeof(ci->error_str),
1935                             "interrupted by signal");
1936                         ci->status = CTL_ISCSI_ERROR;
1937                         return;
1938                 }
1939         }
1940
1941         if (cs->cs_terminating) {
1942                 CFISCSI_SESSION_UNLOCK(cs);
1943                 snprintf(ci->error_str, sizeof(ci->error_str),
1944                     "connection terminating");
1945                 ci->status = CTL_ISCSI_ERROR;
1946                 return;
1947         }
1948         ip = cs->cs_login_pdu;
1949         cs->cs_login_pdu = NULL;
1950         CFISCSI_SESSION_UNLOCK(cs);
1951
1952         if (ip->ip_data_len > cirp->data_segment_len) {
1953                 icl_pdu_free(ip);
1954                 snprintf(ci->error_str, sizeof(ci->error_str),
1955                     "data segment too big");
1956                 ci->status = CTL_ISCSI_ERROR;
1957                 return;
1958         }
1959
1960         copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs));
1961         if (ip->ip_data_len > 0) {
1962                 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK);
1963                 icl_pdu_get_data(ip, 0, data, ip->ip_data_len);
1964                 copyout(data, cirp->data_segment, ip->ip_data_len);
1965                 free(data, M_CFISCSI);
1966         }
1967
1968         icl_pdu_free(ip);
1969         ci->status = CTL_ISCSI_OK;
1970 }
1971
1972 #endif /* !ICL_KERNEL_PROXY */
1973
1974 static int
1975 cfiscsi_ioctl(struct cdev *dev,
1976     u_long cmd, caddr_t addr, int flag, struct thread *td)
1977 {
1978         struct ctl_iscsi *ci;
1979
1980         if (cmd != CTL_ISCSI)
1981                 return (ENOTTY);
1982
1983         ci = (struct ctl_iscsi *)addr;
1984         switch (ci->type) {
1985         case CTL_ISCSI_HANDOFF:
1986                 cfiscsi_ioctl_handoff(ci);
1987                 break;
1988         case CTL_ISCSI_LIST:
1989                 cfiscsi_ioctl_list(ci);
1990                 break;
1991         case CTL_ISCSI_TERMINATE:
1992                 cfiscsi_ioctl_terminate(ci);
1993                 break;
1994         case CTL_ISCSI_LOGOUT:
1995                 cfiscsi_ioctl_logout(ci);
1996                 break;
1997 #ifdef ICL_KERNEL_PROXY
1998         case CTL_ISCSI_LISTEN:
1999                 cfiscsi_ioctl_listen(ci);
2000                 break;
2001         case CTL_ISCSI_ACCEPT:
2002                 cfiscsi_ioctl_accept(ci);
2003                 break;
2004         case CTL_ISCSI_SEND:
2005                 cfiscsi_ioctl_send(ci);
2006                 break;
2007         case CTL_ISCSI_RECEIVE:
2008                 cfiscsi_ioctl_receive(ci);
2009                 break;
2010 #else
2011         case CTL_ISCSI_LISTEN:
2012         case CTL_ISCSI_ACCEPT:
2013         case CTL_ISCSI_SEND:
2014         case CTL_ISCSI_RECEIVE:
2015                 ci->status = CTL_ISCSI_ERROR;
2016                 snprintf(ci->error_str, sizeof(ci->error_str),
2017                     "%s: CTL compiled without ICL_KERNEL_PROXY",
2018                     __func__);
2019                 break;
2020 #endif /* !ICL_KERNEL_PROXY */
2021         default:
2022                 ci->status = CTL_ISCSI_ERROR;
2023                 snprintf(ci->error_str, sizeof(ci->error_str),
2024                     "%s: invalid iSCSI request type %d", __func__, ci->type);
2025                 break;
2026         }
2027
2028         return (0);
2029 }
2030
2031 static int
2032 cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len)
2033 {
2034         struct cfiscsi_session *cs;
2035         struct scsi_vpd_device_id *devid_ptr;
2036         struct scsi_vpd_id_descriptor *desc, *desc1;
2037         struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */
2038         struct scsi_vpd_id_t10 *t10id;
2039         struct ctl_lun *lun;
2040         const struct icl_pdu *request;
2041         size_t devid_len, wwpn_len;
2042
2043         lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr;
2044         request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2045         cs = PDU_SESSION(request);
2046
2047         wwpn_len = strlen(cs->cs_target->ct_name);
2048         wwpn_len += strlen(",t,0x01");
2049         wwpn_len += 1; /* '\0' */
2050         if ((wwpn_len % 4) != 0)
2051                 wwpn_len += (4 - (wwpn_len % 4));
2052
2053         devid_len = sizeof(struct scsi_vpd_device_id) +
2054                 sizeof(struct scsi_vpd_id_descriptor) +
2055                 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN +
2056                 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len +
2057                 sizeof(struct scsi_vpd_id_descriptor) +
2058                 sizeof(struct scsi_vpd_id_rel_trgt_port_id) +
2059                 sizeof(struct scsi_vpd_id_descriptor) +
2060                 sizeof(struct scsi_vpd_id_trgt_port_grp_id);
2061
2062         ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO);
2063         devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr;
2064         ctsio->kern_sg_entries = 0;
2065
2066         if (devid_len < alloc_len) {
2067                 ctsio->residual = alloc_len - devid_len;
2068                 ctsio->kern_data_len = devid_len;
2069                 ctsio->kern_total_len = devid_len;
2070         } else {
2071                 ctsio->residual = 0;
2072                 ctsio->kern_data_len = alloc_len;
2073                 ctsio->kern_total_len = alloc_len;
2074         }
2075         ctsio->kern_data_resid = 0;
2076         ctsio->kern_rel_offset = 0;
2077         ctsio->kern_sg_entries = 0;
2078
2079         desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list;
2080         t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0];
2081         desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] +
2082             sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN);
2083         desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] +
2084             wwpn_len);
2085         desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] +
2086             sizeof(struct scsi_vpd_id_rel_trgt_port_id));
2087
2088         if (lun != NULL)
2089                 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) |
2090                     lun->be_lun->lun_type;
2091         else
2092                 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT;
2093
2094         devid_ptr->page_code = SVPD_DEVICE_ID;
2095
2096         scsi_ulto2b(devid_len - 4, devid_ptr->length);
2097
2098         /*
2099          * We're using a LUN association here.  i.e., this device ID is a
2100          * per-LUN identifier.
2101          */
2102         desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII;
2103         desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10;
2104         desc->length = sizeof(*t10id) + CTL_DEVID_LEN;
2105         strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor));
2106
2107         /*
2108          * If we've actually got a backend, copy the device id from the
2109          * per-LUN data.  Otherwise, set it to all spaces.
2110          */
2111         if (lun != NULL) {
2112                 /*
2113                  * Copy the backend's LUN ID.
2114                  */
2115                 strncpy((char *)t10id->vendor_spec_id,
2116                     (char *)lun->be_lun->device_id, CTL_DEVID_LEN);
2117         } else {
2118                 /*
2119                  * No backend, set this to spaces.
2120                  */
2121                 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN);
2122         }
2123
2124         /*
2125          * desc1 is for the WWPN which is a port asscociation.
2126          */
2127         desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8;
2128         desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT |
2129             SVPD_ID_TYPE_SCSI_NAME;
2130         desc1->length = wwpn_len;
2131         snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x",
2132             cs->cs_target->ct_name, cs->cs_portal_group_tag);
2133
2134         /*
2135          * desc2 is for the Relative Target Port(type 4h) identifier
2136          */
2137         desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY;
2138         desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT |
2139             SVPD_ID_TYPE_RELTARG;
2140         desc2->length = 4;
2141         desc2->identifier[3] = 1;
2142
2143         /*
2144          * desc3 is for the Target Port Group(type 5h) identifier
2145          */
2146         desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY;
2147         desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT |
2148             SVPD_ID_TYPE_TPORTGRP;
2149         desc3->length = 4;
2150         desc3->identifier[3] = 1;
2151
2152         ctsio->scsi_status = SCSI_STATUS_OK;
2153
2154         ctsio->be_move_done = ctl_config_move_done;
2155         ctl_datamove((union ctl_io *)ctsio);
2156
2157         return (CTL_RETVAL_COMPLETE);
2158 }
2159
2160 static void
2161 cfiscsi_target_hold(struct cfiscsi_target *ct)
2162 {
2163
2164         refcount_acquire(&ct->ct_refcount);
2165 }
2166
2167 static void
2168 cfiscsi_target_release(struct cfiscsi_target *ct)
2169 {
2170         struct cfiscsi_softc *softc;
2171
2172         softc = ct->ct_softc;
2173         mtx_lock(&softc->lock);
2174         if (refcount_release(&ct->ct_refcount)) {
2175                 TAILQ_REMOVE(&softc->targets, ct, ct_next);
2176                 mtx_unlock(&softc->lock);
2177                 free(ct, M_CFISCSI);
2178
2179                 return;
2180         }
2181         mtx_unlock(&softc->lock);
2182 }
2183
2184 static struct cfiscsi_target *
2185 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name)
2186 {
2187         struct cfiscsi_target *ct;
2188
2189         mtx_lock(&softc->lock);
2190         TAILQ_FOREACH(ct, &softc->targets, ct_next) {
2191                 if (strcmp(name, ct->ct_name) != 0)
2192                         continue;
2193                 cfiscsi_target_hold(ct);
2194                 mtx_unlock(&softc->lock);
2195                 return (ct);
2196         }
2197         mtx_unlock(&softc->lock);
2198
2199         return (NULL);
2200 }
2201
2202 static struct cfiscsi_target *
2203 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name,
2204     const char *alias)
2205 {
2206         struct cfiscsi_target *ct, *newct;
2207         int i;
2208
2209         if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN)
2210                 return (NULL);
2211
2212         newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO);
2213
2214         mtx_lock(&softc->lock);
2215         TAILQ_FOREACH(ct, &softc->targets, ct_next) {
2216                 if (strcmp(name, ct->ct_name) != 0)
2217                         continue;
2218                 cfiscsi_target_hold(ct);
2219                 mtx_unlock(&softc->lock);
2220                 free(newct, M_CFISCSI);
2221                 return (ct);
2222         }
2223
2224         for (i = 0; i < CTL_MAX_LUNS; i++)
2225                 newct->ct_luns[i] = -1;
2226
2227         strlcpy(newct->ct_name, name, sizeof(newct->ct_name));
2228         if (alias != NULL)
2229                 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias));
2230         refcount_init(&newct->ct_refcount, 1);
2231         newct->ct_softc = softc;
2232         TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next);
2233         mtx_unlock(&softc->lock);
2234
2235         return (newct);
2236 }
2237
2238 /*
2239  * Takes LUN from the target space and returns LUN from the CTL space.
2240  */
2241 static uint32_t
2242 cfiscsi_map_lun(void *arg, uint32_t lun)
2243 {
2244         struct cfiscsi_session *cs;
2245
2246         cs = arg;
2247
2248         if (lun >= CTL_MAX_LUNS) {
2249                 CFISCSI_DEBUG("requested lun number %d is higher "
2250                     "than maximum %d", lun, CTL_MAX_LUNS - 1);
2251                 return (0xffffffff);
2252         }
2253
2254         if (cs->cs_target->ct_luns[lun] < 0)
2255                 return (0xffffffff);
2256
2257         return (cs->cs_target->ct_luns[lun]);
2258 }
2259
2260 static int
2261 cfiscsi_target_set_lun(struct cfiscsi_target *ct,
2262     unsigned long lun_id, unsigned long ctl_lun_id)
2263 {
2264
2265         if (lun_id >= CTL_MAX_LUNS) {
2266                 CFISCSI_WARN("requested lun number %ld is higher "
2267                     "than maximum %d", lun_id, CTL_MAX_LUNS - 1);
2268                 return (-1);
2269         }
2270
2271         if (ct->ct_luns[lun_id] >= 0) {
2272                 /*
2273                  * CTL calls cfiscsi_lun_enable() twice for each LUN - once
2274                  * when the LUN is created, and a second time just before
2275                  * the port is brought online; don't emit warnings
2276                  * for that case.
2277                  */
2278                 if (ct->ct_luns[lun_id] == ctl_lun_id)
2279                         return (0);
2280                 CFISCSI_WARN("lun %ld already allocated", lun_id);
2281                 return (-1);
2282         }
2283
2284 #if 0
2285         CFISCSI_DEBUG("adding mapping for lun %ld, target %s "
2286             "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id);
2287 #endif
2288
2289         ct->ct_luns[lun_id] = ctl_lun_id;
2290         cfiscsi_target_hold(ct);
2291
2292         return (0);
2293 }
2294
2295 static int
2296 cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id)
2297 {
2298
2299         if (ct->ct_luns[lun_id] < 0) {
2300                 CFISCSI_WARN("lun %ld not allocated", lun_id);
2301                 return (-1);
2302         }
2303
2304         ct->ct_luns[lun_id] = -1;
2305         cfiscsi_target_release(ct);
2306
2307         return (0);
2308 }
2309
2310 static int
2311 cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id)
2312 {
2313         struct cfiscsi_softc *softc;
2314         struct cfiscsi_target *ct;
2315         struct ctl_be_lun_option *opt;
2316         const char *target = NULL, *target_alias = NULL;
2317         const char *lun = NULL;
2318         unsigned long tmp;
2319
2320         softc = (struct cfiscsi_softc *)arg;
2321
2322         STAILQ_FOREACH(opt,
2323             &control_softc->ctl_luns[lun_id]->be_lun->options, links) {
2324                 if (strcmp(opt->name, "cfiscsi_target") == 0)
2325                         target = opt->value;
2326                 else if (strcmp(opt->name, "cfiscsi_target_alias") == 0)
2327                         target_alias = opt->value;
2328                 else if (strcmp(opt->name, "cfiscsi_lun") == 0)
2329                         lun = opt->value;
2330         }
2331
2332         if (target == NULL && lun == NULL)
2333                 return (0);
2334
2335         if (target == NULL || lun == NULL) {
2336                 CFISCSI_WARN("lun added with cfiscsi_target, but without "
2337                     "cfiscsi_lun, or the other way around; ignoring");
2338                 return (0);
2339         }
2340
2341         ct = cfiscsi_target_find_or_create(softc, target, target_alias);
2342         if (ct == NULL) {
2343                 CFISCSI_WARN("failed to create target \"%s\"", target);
2344                 return (0);
2345         }
2346
2347         tmp = strtoul(lun, NULL, 10);
2348         cfiscsi_target_set_lun(ct, tmp, lun_id);
2349         cfiscsi_target_release(ct);
2350         return (0);
2351 }
2352
2353 static int
2354 cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id)
2355 {
2356         struct cfiscsi_softc *softc;
2357         struct cfiscsi_target *ct;
2358         int i;
2359
2360         softc = (struct cfiscsi_softc *)arg;
2361
2362         mtx_lock(&softc->lock);
2363         TAILQ_FOREACH(ct, &softc->targets, ct_next) {
2364                 for (i = 0; i < CTL_MAX_LUNS; i++) {
2365                         if (ct->ct_luns[i] < 0)
2366                                 continue;
2367                         if (ct->ct_luns[i] != lun_id)
2368                                 continue;
2369                         mtx_unlock(&softc->lock);
2370                         cfiscsi_target_unset_lun(ct, i);
2371                         return (0);
2372                 }
2373         }
2374         mtx_unlock(&softc->lock);
2375         return (0);
2376 }
2377
2378 static void
2379 cfiscsi_datamove_in(union ctl_io *io)
2380 {
2381         struct cfiscsi_session *cs;
2382         struct icl_pdu *request, *response;
2383         const struct iscsi_bhs_scsi_command *bhssc;
2384         struct iscsi_bhs_data_in *bhsdi;
2385         struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
2386         size_t len, expected_len, sg_len, buffer_offset;
2387         const char *sg_addr;
2388         int ctl_sg_count, error, i;
2389
2390         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2391         cs = PDU_SESSION(request);
2392
2393         bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs;
2394         KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2395             ISCSI_BHS_OPCODE_SCSI_COMMAND,
2396             ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND"));
2397
2398         if (io->scsiio.kern_sg_entries > 0) {
2399                 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
2400                 ctl_sg_count = io->scsiio.kern_sg_entries;
2401         } else {
2402                 ctl_sglist = &ctl_sg_entry;
2403                 ctl_sglist->addr = io->scsiio.kern_data_ptr;
2404                 ctl_sglist->len = io->scsiio.kern_data_len;
2405                 ctl_sg_count = 1;
2406         }
2407
2408         /*
2409          * This is the total amount of data to be transferred within the current
2410          * SCSI command.  We need to record it so that we can properly report
2411          * underflow/underflow.
2412          */
2413         PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len;
2414
2415         /*
2416          * This is the offset within the current SCSI command; for the first
2417          * call to cfiscsi_datamove() it will be 0, and for subsequent ones
2418          * it will be the sum of lengths of previous ones.
2419          */
2420         buffer_offset = io->scsiio.kern_rel_offset;
2421
2422         /*
2423          * This is the transfer length expected by the initiator.  In theory,
2424          * it could be different from the correct amount of data from the SCSI
2425          * point of view, even if that doesn't make any sense.
2426          */
2427         expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length);
2428 #if 0
2429         if (expected_len != io->scsiio.kern_total_len) {
2430                 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, "
2431                     "actual length %zd", expected_len,
2432                     (size_t)io->scsiio.kern_total_len);
2433         }
2434 #endif
2435
2436         if (buffer_offset >= expected_len) {
2437 #if 0
2438                 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, "
2439                     "already sent the expected len", buffer_offset);
2440 #endif
2441                 io->scsiio.be_move_done(io);
2442                 return;
2443         }
2444
2445         i = 0;
2446         sg_addr = NULL;
2447         sg_len = 0;
2448         response = NULL;
2449         bhsdi = NULL;
2450         for (;;) {
2451                 if (response == NULL) {
2452                         response = cfiscsi_pdu_new_response(request, M_NOWAIT);
2453                         if (response == NULL) {
2454                                 CFISCSI_SESSION_WARN(cs, "failed to "
2455                                     "allocate memory; dropping connection");
2456                                 ctl_set_busy(&io->scsiio);
2457                                 io->scsiio.be_move_done(io);
2458                                 cfiscsi_session_terminate(cs);
2459                                 return;
2460                         }
2461                         bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs;
2462                         bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN;
2463                         bhsdi->bhsdi_initiator_task_tag =
2464                             bhssc->bhssc_initiator_task_tag;
2465                         bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request));
2466                         PDU_EXPDATASN(request)++;
2467                         bhsdi->bhsdi_buffer_offset = htonl(buffer_offset);
2468                 }
2469
2470                 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count"));
2471                 if (sg_len == 0) {
2472                         sg_addr = ctl_sglist[i].addr;
2473                         sg_len = ctl_sglist[i].len;
2474                         KASSERT(sg_len > 0, ("sg_len <= 0"));
2475                 }
2476
2477                 len = sg_len;
2478
2479                 /*
2480                  * Truncate to maximum data segment length.
2481                  */
2482                 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length,
2483                     ("ip_data_len %zd >= max_data_segment_length %zd",
2484                     response->ip_data_len, cs->cs_max_data_segment_length));
2485                 if (response->ip_data_len + len >
2486                     cs->cs_max_data_segment_length) {
2487                         len = cs->cs_max_data_segment_length -
2488                             response->ip_data_len;
2489                         KASSERT(len <= sg_len, ("len %zd > sg_len %zd",
2490                             len, sg_len));
2491                 }
2492
2493                 /*
2494                  * Truncate to expected data transfer length.
2495                  */
2496                 KASSERT(buffer_offset + response->ip_data_len < expected_len,
2497                     ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd",
2498                     buffer_offset, response->ip_data_len, expected_len));
2499                 if (buffer_offset + response->ip_data_len + len > expected_len) {
2500                         CFISCSI_SESSION_DEBUG(cs, "truncating from %zd "
2501                             "to expected data transfer length %zd",
2502                             buffer_offset + response->ip_data_len + len, expected_len);
2503                         len = expected_len - (buffer_offset + response->ip_data_len);
2504                         KASSERT(len <= sg_len, ("len %zd > sg_len %zd",
2505                             len, sg_len));
2506                 }
2507
2508                 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT);
2509                 if (error != 0) {
2510                         CFISCSI_SESSION_WARN(cs, "failed to "
2511                             "allocate memory; dropping connection");
2512                         icl_pdu_free(response);
2513                         ctl_set_busy(&io->scsiio);
2514                         io->scsiio.be_move_done(io);
2515                         cfiscsi_session_terminate(cs);
2516                         return;
2517                 }
2518                 sg_addr += len;
2519                 sg_len -= len;
2520
2521                 KASSERT(buffer_offset + request->ip_data_len <= expected_len,
2522                     ("buffer_offset %zd + ip_data_len %zd > expected_len %zd",
2523                     buffer_offset, request->ip_data_len, expected_len));
2524                 if (buffer_offset + request->ip_data_len == expected_len) {
2525                         /*
2526                          * Already have the amount of data the initiator wanted.
2527                          */
2528                         break;
2529                 }
2530
2531                 if (sg_len == 0) {
2532                         /*
2533                          * End of scatter-gather segment;
2534                          * proceed to the next one...
2535                          */
2536                         if (i == ctl_sg_count - 1) {
2537                                 /*
2538                                  * ... unless this was the last one.
2539                                  */
2540                                 break;
2541                         }
2542                         i++;
2543                 }
2544
2545                 if (response->ip_data_len == cs->cs_max_data_segment_length) {
2546                         /*
2547                          * Can't stuff more data into the current PDU;
2548                          * queue it.  Note that's not enough to check
2549                          * for kern_data_resid == 0 instead; there
2550                          * may be several Data-In PDUs for the final
2551                          * call to cfiscsi_datamove(), and we want
2552                          * to set the F flag only on the last of them.
2553                          */
2554                         buffer_offset += response->ip_data_len;
2555                         if (buffer_offset == io->scsiio.kern_total_len ||
2556                             buffer_offset == expected_len)
2557                                 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F;
2558                         cfiscsi_pdu_queue(response);
2559                         response = NULL;
2560                         bhsdi = NULL;
2561                 }
2562         }
2563         if (response != NULL) {
2564                 buffer_offset += response->ip_data_len;
2565                 if (buffer_offset == io->scsiio.kern_total_len ||
2566                     buffer_offset == expected_len)
2567                         bhsdi->bhsdi_flags |= BHSDI_FLAGS_F;
2568                 KASSERT(response->ip_data_len > 0, ("sending empty Data-In"));
2569                 cfiscsi_pdu_queue(response);
2570         }
2571
2572         io->scsiio.be_move_done(io);
2573 }
2574
2575 static void
2576 cfiscsi_datamove_out(union ctl_io *io)
2577 {
2578         struct cfiscsi_session *cs;
2579         struct icl_pdu *request, *response;
2580         const struct iscsi_bhs_scsi_command *bhssc;
2581         struct iscsi_bhs_r2t *bhsr2t;
2582         struct cfiscsi_data_wait *cdw;
2583         uint32_t target_transfer_tag;
2584         bool done;
2585
2586         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2587         cs = PDU_SESSION(request);
2588
2589         bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs;
2590         KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2591             ISCSI_BHS_OPCODE_SCSI_COMMAND,
2592             ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND"));
2593
2594         /*
2595          * We need to record it so that we can properly report
2596          * underflow/underflow.
2597          */
2598         PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len;
2599
2600         /*
2601          * We hadn't received anything during this datamove yet.
2602          */
2603         io->scsiio.ext_data_filled = 0;
2604
2605         target_transfer_tag =
2606             atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1);
2607
2608 #if 0
2609         CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator "
2610             "task tag 0x%x, target transfer tag 0x%x",
2611             bhssc->bhssc_initiator_task_tag, target_transfer_tag);
2612 #endif
2613         cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO);
2614         if (cdw == NULL) {
2615                 CFISCSI_SESSION_WARN(cs, "failed to "
2616                     "allocate memory; dropping connection");
2617                 ctl_set_busy(&io->scsiio);
2618                 io->scsiio.be_move_done(io);
2619                 cfiscsi_session_terminate(cs);
2620                 return;
2621         }
2622         cdw->cdw_ctl_io = io;
2623         cdw->cdw_target_transfer_tag = target_transfer_tag;
2624         cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag;
2625
2626         if (cs->cs_immediate_data && io->scsiio.kern_rel_offset == 0 &&
2627             icl_pdu_data_segment_length(request) > 0) {
2628                 done = cfiscsi_handle_data_segment(request, cdw);
2629                 if (done) {
2630                         uma_zfree(cfiscsi_data_wait_zone, cdw);
2631                         io->scsiio.be_move_done(io);
2632                         return;
2633                 }
2634         }
2635
2636         CFISCSI_SESSION_LOCK(cs);
2637         TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next);
2638         CFISCSI_SESSION_UNLOCK(cs);
2639
2640         /*
2641          * XXX: We should limit the number of outstanding R2T PDUs
2642          *      per task to MaxOutstandingR2T.
2643          */
2644         response = cfiscsi_pdu_new_response(request, M_NOWAIT);
2645         if (response == NULL) {
2646                 CFISCSI_SESSION_WARN(cs, "failed to "
2647                     "allocate memory; dropping connection");
2648                 ctl_set_busy(&io->scsiio);
2649                 io->scsiio.be_move_done(io);
2650                 cfiscsi_session_terminate(cs);
2651                 return;
2652         }
2653         bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs;
2654         bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T;
2655         bhsr2t->bhsr2t_flags = 0x80;
2656         bhsr2t->bhsr2t_lun = bhssc->bhssc_lun;
2657         bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag;
2658         bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag;
2659         /*
2660          * XXX: Here we assume that cfiscsi_datamove() won't ever
2661          *      be running concurrently on several CPUs for a given
2662          *      command.
2663          */
2664         bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request));
2665         PDU_R2TSN(request)++;
2666         /*
2667          * This is the offset within the current SCSI command;
2668          * i.e. for the first call of datamove(), it will be 0,
2669          * and for subsequent ones it will be the sum of lengths
2670          * of previous ones.
2671          *
2672          * The ext_data_filled is to account for unsolicited
2673          * (immediate) data that might have already arrived.
2674          */
2675         bhsr2t->bhsr2t_buffer_offset =
2676             htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled);
2677         /*
2678          * This is the total length (sum of S/G lengths) this call
2679          * to cfiscsi_datamove() is supposed to handle.
2680          *
2681          * XXX: Limit it to MaxBurstLength.
2682          */
2683         bhsr2t->bhsr2t_desired_data_transfer_length =
2684             htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled);
2685         cfiscsi_pdu_queue(response);
2686 }
2687
2688 static void
2689 cfiscsi_datamove(union ctl_io *io)
2690 {
2691
2692         if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN)
2693                 cfiscsi_datamove_in(io);
2694         else
2695                 cfiscsi_datamove_out(io);
2696 }
2697
2698 static void
2699 cfiscsi_scsi_command_done(union ctl_io *io)
2700 {
2701         struct icl_pdu *request, *response;
2702         struct iscsi_bhs_scsi_command *bhssc;
2703         struct iscsi_bhs_scsi_response *bhssr;
2704 #ifdef DIAGNOSTIC
2705         struct cfiscsi_data_wait *cdw;
2706 #endif
2707         struct cfiscsi_session *cs;
2708         uint16_t sense_length;
2709
2710         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2711         cs = PDU_SESSION(request);
2712         bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs;
2713         KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2714             ISCSI_BHS_OPCODE_SCSI_COMMAND,
2715             ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode));
2716
2717         //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x",
2718         //    bhssc->bhssc_initiator_task_tag);
2719
2720 #ifdef DIAGNOSTIC
2721         CFISCSI_SESSION_LOCK(cs);
2722         TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next)
2723                 KASSERT(bhssc->bhssc_initiator_task_tag !=
2724                     cdw->cdw_initiator_task_tag, ("dangling cdw"));
2725         CFISCSI_SESSION_UNLOCK(cs);
2726 #endif
2727
2728         response = cfiscsi_pdu_new_response(request, M_WAITOK);
2729         bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs;
2730         bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE;
2731         bhssr->bhssr_flags = 0x80;
2732         /*
2733          * XXX: We don't deal with bidirectional under/overflows;
2734          *      does anything actually support those?
2735          */
2736         if (PDU_TOTAL_TRANSFER_LEN(request) <
2737             ntohl(bhssc->bhssc_expected_data_transfer_length)) {
2738                 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW;
2739                 bhssr->bhssr_residual_count =
2740                     htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) -
2741                     PDU_TOTAL_TRANSFER_LEN(request));
2742                 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d",
2743                 //    ntohl(bhssr->bhssr_residual_count));
2744         } else if (PDU_TOTAL_TRANSFER_LEN(request) >
2745             ntohl(bhssc->bhssc_expected_data_transfer_length)) {
2746                 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW;
2747                 bhssr->bhssr_residual_count =
2748                     htonl(PDU_TOTAL_TRANSFER_LEN(request) -
2749                     ntohl(bhssc->bhssc_expected_data_transfer_length));
2750                 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d",
2751                 //    ntohl(bhssr->bhssr_residual_count));
2752         }
2753         bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED;
2754         bhssr->bhssr_status = io->scsiio.scsi_status;
2755         bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag;
2756         bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request));
2757
2758         if (io->scsiio.sense_len > 0) {
2759 #if 0
2760                 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data",
2761                     io->scsiio.sense_len);
2762 #endif
2763                 sense_length = htons(io->scsiio.sense_len);
2764                 icl_pdu_append_data(response,
2765                     &sense_length, sizeof(sense_length), M_WAITOK);
2766                 icl_pdu_append_data(response,
2767                     &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK);
2768         }
2769
2770         ctl_free_io(io);
2771         icl_pdu_free(request);
2772         cfiscsi_pdu_queue(response);
2773 }
2774
2775 static void
2776 cfiscsi_task_management_done(union ctl_io *io)
2777 {
2778         struct icl_pdu *request, *response;
2779         struct iscsi_bhs_task_management_request *bhstmr;
2780         struct iscsi_bhs_task_management_response *bhstmr2;
2781         struct cfiscsi_data_wait *cdw, *tmpcdw;
2782         struct cfiscsi_session *cs;
2783
2784         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2785         cs = PDU_SESSION(request);
2786         bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs;
2787         KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2788             ISCSI_BHS_OPCODE_TASK_REQUEST,
2789             ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode));
2790
2791 #if 0
2792         CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x",
2793             bhstmr->bhstmr_initiator_task_tag,
2794             bhstmr->bhstmr_referenced_task_tag);
2795 #endif
2796
2797         if ((bhstmr->bhstmr_function & ~0x80) ==
2798             BHSTMR_FUNCTION_ABORT_TASK) {
2799                 /*
2800                  * Make sure we no longer wait for Data-Out for this command.
2801                  */
2802                 CFISCSI_SESSION_LOCK(cs);
2803                 TAILQ_FOREACH_SAFE(cdw,
2804                     &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) {
2805                         if (bhstmr->bhstmr_referenced_task_tag !=
2806                             cdw->cdw_initiator_task_tag)
2807                                 continue;
2808
2809 #if 0
2810                         CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task "
2811                             "tag 0x%x", bhstmr->bhstmr_initiator_task_tag);
2812 #endif
2813                         TAILQ_REMOVE(&cs->cs_waiting_for_data_out,
2814                             cdw, cdw_next);
2815                         cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io);
2816                         uma_zfree(cfiscsi_data_wait_zone, cdw);
2817                 }
2818                 CFISCSI_SESSION_UNLOCK(cs);
2819         }
2820
2821         response = cfiscsi_pdu_new_response(request, M_WAITOK);
2822         bhstmr2 = (struct iscsi_bhs_task_management_response *)
2823             response->ip_bhs;
2824         bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE;
2825         bhstmr2->bhstmr_flags = 0x80;
2826         if (io->io_hdr.status == CTL_SUCCESS) {
2827                 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE;
2828         } else {
2829                 /*
2830                  * XXX: How to figure out what exactly went wrong?  iSCSI spec
2831                  *      expects us to provide detailed error, e.g. "Task does
2832                  *      not exist" or "LUN does not exist".
2833                  */
2834                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED");
2835                 bhstmr2->bhstmr_response =
2836                     BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED;
2837         }
2838         bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag;
2839
2840         ctl_free_io(io);
2841         icl_pdu_free(request);
2842         cfiscsi_pdu_queue(response);
2843 }
2844
2845 static void
2846 cfiscsi_done(union ctl_io *io)
2847 {
2848         struct icl_pdu *request;
2849         struct cfiscsi_session *cs;
2850
2851         KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE),
2852                 ("invalid CTL status %#x", io->io_hdr.status));
2853
2854         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2855         if (request == NULL) {
2856                 /*
2857                  * Implicit task termination has just completed; nothing to do.
2858                  */
2859                 return;
2860         }
2861
2862         cs = PDU_SESSION(request);
2863         refcount_release(&cs->cs_outstanding_ctl_pdus);
2864
2865         switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) {
2866         case ISCSI_BHS_OPCODE_SCSI_COMMAND:
2867                 cfiscsi_scsi_command_done(io);
2868                 break;
2869         case ISCSI_BHS_OPCODE_TASK_REQUEST:
2870                 cfiscsi_task_management_done(io);
2871                 break;
2872         default:
2873                 panic("cfiscsi_done called with wrong opcode 0x%x",
2874                     request->ip_bhs->bhs_opcode);
2875         }
2876 }