FreeBSD kernel CAM code
ctl_frontend_iscsi.c
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1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2012 The FreeBSD Foundation
5 *
6 * This software was developed by Edward Tomasz Napierala under sponsorship
7 * from the FreeBSD Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $FreeBSD$
31 */
32
33/*
34 * CTL frontend for the iSCSI protocol.
35 */
36
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD$");
39
40#include <sys/param.h>
41#include <sys/capsicum.h>
42#include <sys/condvar.h>
43#include <sys/endian.h>
44#include <sys/file.h>
45#include <sys/kernel.h>
46#include <sys/kthread.h>
47#include <sys/lock.h>
48#include <sys/malloc.h>
49#include <sys/module.h>
50#include <sys/mutex.h>
51#include <sys/queue.h>
52#include <sys/sbuf.h>
53#include <sys/socket.h>
54#include <sys/sysctl.h>
55#include <sys/systm.h>
56#include <sys/uio.h>
57#include <sys/unistd.h>
58#include <sys/nv.h>
59#include <sys/dnv.h>
60#include <vm/uma.h>
61
62#include <cam/scsi/scsi_all.h>
63#include <cam/scsi/scsi_da.h>
64#include <cam/ctl/ctl_io.h>
65#include <cam/ctl/ctl.h>
66#include <cam/ctl/ctl_backend.h>
67#include <cam/ctl/ctl_error.h>
68#include <cam/ctl/ctl_frontend.h>
69#include <cam/ctl/ctl_debug.h>
70#include <cam/ctl/ctl_ha.h>
71#include <cam/ctl/ctl_ioctl.h>
72#include <cam/ctl/ctl_private.h>
73
74#include <dev/iscsi/icl.h>
75#include <dev/iscsi/icl_wrappers.h>
76#include <dev/iscsi/iscsi_proto.h>
77#include <cam/ctl/ctl_frontend_iscsi.h>
78
79#ifdef ICL_KERNEL_PROXY
80#include <sys/socketvar.h>
81#endif
82
83#ifdef ICL_KERNEL_PROXY
84FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY");
85#endif
86
87/* Used for internal nexus reset task. */
88#define ISCSI_BHS_OPCODE_INTERNAL 0x3e
89
90static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend");
91static uma_zone_t cfiscsi_data_wait_zone;
92
93SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
94 "CAM Target Layer iSCSI Frontend");
95static int debug = 1;
96SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN,
97 &debug, 1, "Enable debug messages");
98static int ping_timeout = 5;
99SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN,
100 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds");
101static int login_timeout = 60;
102SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN,
103 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds");
104static int maxtags = 256;
105SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxtags, CTLFLAG_RWTUN,
106 &maxtags, 0, "Max number of requests queued by initiator");
107
108#define CFISCSI_DEBUG(X, ...) \
109 do { \
110 if (debug > 1) { \
111 printf("%s: " X "\n", \
112 __func__, ## __VA_ARGS__); \
113 } \
114 } while (0)
115
116#define CFISCSI_WARN(X, ...) \
117 do { \
118 if (debug > 0) { \
119 printf("WARNING: %s: " X "\n", \
120 __func__, ## __VA_ARGS__); \
121 } \
122 } while (0)
123
124#define CFISCSI_SESSION_DEBUG(S, X, ...) \
125 do { \
126 if (debug > 1) { \
127 printf("%s: %s (%s): " X "\n", \
128 __func__, S->cs_initiator_addr, \
129 S->cs_initiator_name, ## __VA_ARGS__); \
130 } \
131 } while (0)
132
133#define CFISCSI_SESSION_WARN(S, X, ...) \
134 do { \
135 if (debug > 0) { \
136 printf("WARNING: %s (%s): " X "\n", \
137 S->cs_initiator_addr, \
138 S->cs_initiator_name, ## __VA_ARGS__); \
139 } \
140 } while (0)
141
142#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock)
143#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock)
144#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED)
145
146#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0)
147#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn)
148
149struct cfiscsi_priv {
150 void *request;
151 uint32_t expdatasn;
152 uint32_t r2tsn;
153};
154#define PRIV(io) \
155 ((struct cfiscsi_priv *)&(io)->io_hdr.ctl_private[CTL_PRIV_FRONTEND])
156#define PRIV_REQUEST(io) PRIV(io)->request
157#define PRIV_EXPDATASN(io) PRIV(io)->expdatasn
158#define PRIV_R2TSN(io) PRIV(io)->r2tsn
159
160static int cfiscsi_init(void);
161static int cfiscsi_shutdown(void);
162static void cfiscsi_online(void *arg);
163static void cfiscsi_offline(void *arg);
164static int cfiscsi_info(void *arg, struct sbuf *sb);
165static int cfiscsi_ioctl(struct cdev *dev,
166 u_long cmd, caddr_t addr, int flag, struct thread *td);
167static void cfiscsi_datamove(union ctl_io *io);
168static void cfiscsi_datamove_in(union ctl_io *io);
169static void cfiscsi_datamove_out(union ctl_io *io);
170static void cfiscsi_done(union ctl_io *io);
171static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request);
172static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request);
173static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request);
174static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request);
175static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request);
176static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request);
177static void cfiscsi_session_terminate(struct cfiscsi_session *cs);
178static struct cfiscsi_data_wait *cfiscsi_data_wait_new(
179 struct cfiscsi_session *cs, union ctl_io *io,
180 uint32_t initiator_task_tag,
181 uint32_t *target_transfer_tagp);
182static void cfiscsi_data_wait_free(struct cfiscsi_session *cs,
183 struct cfiscsi_data_wait *cdw);
184static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc
185 *softc, const char *name, uint16_t tag);
186static struct cfiscsi_target *cfiscsi_target_find_or_create(
187 struct cfiscsi_softc *softc, const char *name, const char *alias,
188 uint16_t tag);
189static void cfiscsi_target_release(struct cfiscsi_target *ct);
190static void cfiscsi_session_delete(struct cfiscsi_session *cs);
191
192static struct cfiscsi_softc cfiscsi_softc;
193
194static struct ctl_frontend cfiscsi_frontend =
195{
196 .name = "iscsi",
197 .init = cfiscsi_init,
198 .ioctl = cfiscsi_ioctl,
199 .shutdown = cfiscsi_shutdown,
200};
201CTL_FRONTEND_DECLARE(cfiscsi, cfiscsi_frontend);
202MODULE_DEPEND(cfiscsi, icl, 1, 1, 1);
203
204static struct icl_pdu *
205cfiscsi_pdu_new_response(struct icl_pdu *request, int flags)
206{
207
208 return (icl_pdu_new(request->ip_conn, flags));
209}
210
211static bool
212cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request)
213{
214 const struct iscsi_bhs_scsi_command *bhssc;
215 struct cfiscsi_session *cs;
216 uint32_t cmdsn, curcmdsn;
217
218 cs = PDU_SESSION(request);
219
220 /*
221 * Every incoming PDU - not just NOP-Out - resets the ping timer.
222 * The purpose of the timeout is to reset the connection when it stalls;
223 * we don't want this to happen when NOP-In or NOP-Out ends up delayed
224 * in some queue.
225 */
226 cs->cs_timeout = 0;
227
228 /*
229 * Immediate commands carry cmdsn, but it is neither incremented nor
230 * verified.
231 */
232 if (request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE)
233 return (false);
234
235 /*
236 * Data-Out PDUs don't contain CmdSN.
237 */
238 if (request->ip_bhs->bhs_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_OUT)
239 return (false);
240
241 /*
242 * We're only using fields common for all the request
243 * (initiator -> target) PDUs.
244 */
245 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs;
246 curcmdsn = cmdsn = ntohl(bhssc->bhssc_cmdsn);
247
248 /*
249 * Increment session cmdsn and exit if we received the expected value.
250 */
251 do {
252 if (atomic_fcmpset_32(&cs->cs_cmdsn, &curcmdsn, cmdsn + 1))
253 return (false);
254 } while (curcmdsn == cmdsn);
255
256 /*
257 * The target MUST silently ignore any non-immediate command outside
258 * of this range.
259 */
260 if (ISCSI_SNLT(cmdsn, curcmdsn) ||
261 ISCSI_SNGT(cmdsn, curcmdsn - 1 + maxtags)) {
262 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, "
263 "while expected %u", cmdsn, curcmdsn);
264 return (true);
265 }
266
267 /*
268 * We don't support multiple connections now, so any discontinuity in
269 * CmdSN means lost PDUs. Since we don't support PDU retransmission --
270 * terminate the connection.
271 */
272 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, "
273 "while expected %u; dropping connection",
274 cmdsn, curcmdsn);
275 cfiscsi_session_terminate(cs);
276 return (true);
277}
278
279static void
280cfiscsi_pdu_handle(struct icl_pdu *request)
281{
282 struct cfiscsi_session *cs;
283 bool ignore;
284
285 cs = PDU_SESSION(request);
286
287 ignore = cfiscsi_pdu_update_cmdsn(request);
288 if (ignore) {
289 icl_pdu_free(request);
290 return;
291 }
292
293 /*
294 * Handle the PDU; this includes e.g. receiving the remaining
295 * part of PDU and submitting the SCSI command to CTL
296 * or queueing a reply. The handling routine is responsible
297 * for freeing the PDU when it's no longer needed.
298 */
299 switch (request->ip_bhs->bhs_opcode &
300 ~ISCSI_BHS_OPCODE_IMMEDIATE) {
301 case ISCSI_BHS_OPCODE_NOP_OUT:
302 cfiscsi_pdu_handle_nop_out(request);
303 break;
304 case ISCSI_BHS_OPCODE_SCSI_COMMAND:
305 cfiscsi_pdu_handle_scsi_command(request);
306 break;
307 case ISCSI_BHS_OPCODE_TASK_REQUEST:
308 cfiscsi_pdu_handle_task_request(request);
309 break;
310 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT:
311 cfiscsi_pdu_handle_data_out(request);
312 break;
313 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST:
314 cfiscsi_pdu_handle_logout_request(request);
315 break;
316 default:
317 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported "
318 "opcode 0x%x; dropping connection",
319 request->ip_bhs->bhs_opcode);
320 icl_pdu_free(request);
321 cfiscsi_session_terminate(cs);
322 }
323
324}
325
326static void
327cfiscsi_receive_callback(struct icl_pdu *request)
328{
329#ifdef ICL_KERNEL_PROXY
330 struct cfiscsi_session *cs;
331
332 cs = PDU_SESSION(request);
333 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) {
334 if (cs->cs_login_pdu == NULL)
335 cs->cs_login_pdu = request;
336 else
337 icl_pdu_free(request);
338 cv_signal(&cs->cs_login_cv);
339 return;
340 }
341#endif
342
343 cfiscsi_pdu_handle(request);
344}
345
346static void
347cfiscsi_error_callback(struct icl_conn *ic)
348{
349 struct cfiscsi_session *cs;
350
351 cs = CONN_SESSION(ic);
352
353 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection");
354 cfiscsi_session_terminate(cs);
355}
356
357static int
358cfiscsi_pdu_prepare(struct icl_pdu *response)
359{
360 struct cfiscsi_session *cs;
361 struct iscsi_bhs_scsi_response *bhssr;
362 bool advance_statsn = true;
363 uint32_t cmdsn;
364
365 cs = PDU_SESSION(response);
366
367 CFISCSI_SESSION_LOCK_ASSERT(cs);
368
369 /*
370 * We're only using fields common for all the response
371 * (target -> initiator) PDUs.
372 */
373 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs;
374
375 /*
376 * 10.8.3: "The StatSN for this connection is not advanced
377 * after this PDU is sent."
378 */
379 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T)
380 advance_statsn = false;
381
382 /*
383 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff,
384 * StatSN for the connection is not advanced after this PDU is sent."
385 */
386 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN &&
387 bhssr->bhssr_initiator_task_tag == 0xffffffff)
388 advance_statsn = false;
389
390 /*
391 * See the comment below - StatSN is not meaningful and must
392 * not be advanced.
393 */
394 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN &&
395 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0)
396 advance_statsn = false;
397
398 /*
399 * 10.7.3: "The fields StatSN, Status, and Residual Count
400 * only have meaningful content if the S bit is set to 1."
401 */
402 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN ||
403 (bhssr->bhssr_flags & BHSDI_FLAGS_S))
404 bhssr->bhssr_statsn = htonl(cs->cs_statsn);
405 cmdsn = cs->cs_cmdsn;
406 bhssr->bhssr_expcmdsn = htonl(cmdsn);
407 bhssr->bhssr_maxcmdsn = htonl(cmdsn - 1 +
408 imax(0, maxtags - cs->cs_outstanding_ctl_pdus));
409
410 if (advance_statsn)
411 cs->cs_statsn++;
412
413 return (0);
414}
415
416static void
417cfiscsi_pdu_queue(struct icl_pdu *response)
418{
419 struct cfiscsi_session *cs;
420
421 cs = PDU_SESSION(response);
422
423 CFISCSI_SESSION_LOCK(cs);
424 cfiscsi_pdu_prepare(response);
425 icl_pdu_queue(response);
426 CFISCSI_SESSION_UNLOCK(cs);
427}
428
429 static void
430cfiscsi_pdu_queue_cb(struct icl_pdu *response, icl_pdu_cb cb)
431{
432 struct cfiscsi_session *cs = PDU_SESSION(response);
433
434 CFISCSI_SESSION_LOCK(cs);
435 cfiscsi_pdu_prepare(response);
436 icl_pdu_queue_cb(response, cb);
437 CFISCSI_SESSION_UNLOCK(cs);
438}
439
440static void
441cfiscsi_pdu_handle_nop_out(struct icl_pdu *request)
442{
443 struct cfiscsi_session *cs;
444 struct iscsi_bhs_nop_out *bhsno;
445 struct iscsi_bhs_nop_in *bhsni;
446 struct icl_pdu *response;
447 void *data = NULL;
448 size_t datasize;
449 int error;
450
451 cs = PDU_SESSION(request);
452 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs;
453
454 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) {
455 /*
456 * Nothing to do, iscsi_pdu_update_statsn() already
457 * zeroed the timeout.
458 */
459 icl_pdu_free(request);
460 return;
461 }
462
463 datasize = icl_pdu_data_segment_length(request);
464 if (datasize > 0) {
465 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO);
466 if (data == NULL) {
467 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
468 "dropping connection");
469 icl_pdu_free(request);
470 cfiscsi_session_terminate(cs);
471 return;
472 }
473 icl_pdu_get_data(request, 0, data, datasize);
474 }
475
476 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
477 if (response == NULL) {
478 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
479 "droppping connection");
480 free(data, M_CFISCSI);
481 icl_pdu_free(request);
482 cfiscsi_session_terminate(cs);
483 return;
484 }
485 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs;
486 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN;
487 bhsni->bhsni_flags = 0x80;
488 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag;
489 bhsni->bhsni_target_transfer_tag = 0xffffffff;
490 if (datasize > 0) {
491 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT);
492 if (error != 0) {
493 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
494 "dropping connection");
495 free(data, M_CFISCSI);
496 icl_pdu_free(request);
497 icl_pdu_free(response);
498 cfiscsi_session_terminate(cs);
499 return;
500 }
501 free(data, M_CFISCSI);
502 }
503
504 icl_pdu_free(request);
505 cfiscsi_pdu_queue(response);
506}
507
508static void
509cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request)
510{
511 struct iscsi_bhs_scsi_command *bhssc;
512 struct cfiscsi_session *cs;
513 union ctl_io *io;
514 int error;
515
516 cs = PDU_SESSION(request);
517 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs;
518 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x",
519 // bhssc->bhssc_initiator_task_tag);
520
521 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) {
522 CFISCSI_SESSION_WARN(cs, "unsolicited data with "
523 "ImmediateData=No; dropping connection");
524 icl_pdu_free(request);
525 cfiscsi_session_terminate(cs);
526 return;
527 }
528 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref);
529 ctl_zero_io(io);
530 PRIV_REQUEST(io) = request;
531 io->io_hdr.io_type = CTL_IO_SCSI;
532 io->io_hdr.nexus.initid = cs->cs_ctl_initid;
533 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port;
534 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun));
535 io->scsiio.priority = (bhssc->bhssc_pri & BHSSC_PRI_MASK) >>
536 BHSSC_PRI_SHIFT;
537 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag;
538 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) {
539 case BHSSC_FLAGS_ATTR_UNTAGGED:
540 io->scsiio.tag_type = CTL_TAG_UNTAGGED;
541 break;
542 case BHSSC_FLAGS_ATTR_SIMPLE:
543 io->scsiio.tag_type = CTL_TAG_SIMPLE;
544 break;
545 case BHSSC_FLAGS_ATTR_ORDERED:
546 io->scsiio.tag_type = CTL_TAG_ORDERED;
547 break;
548 case BHSSC_FLAGS_ATTR_HOQ:
549 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
550 break;
551 case BHSSC_FLAGS_ATTR_ACA:
552 io->scsiio.tag_type = CTL_TAG_ACA;
553 break;
554 default:
555 io->scsiio.tag_type = CTL_TAG_UNTAGGED;
556 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d",
557 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR);
558 break;
559 }
560 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */
561 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb));
562 refcount_acquire(&cs->cs_outstanding_ctl_pdus);
563 error = ctl_run(io);
564 if (error != CTL_RETVAL_COMPLETE) {
565 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; "
566 "dropping connection", error);
567 ctl_free_io(io);
568 refcount_release(&cs->cs_outstanding_ctl_pdus);
569 icl_pdu_free(request);
570 cfiscsi_session_terminate(cs);
571 }
572}
573
574static void
575cfiscsi_pdu_handle_task_request(struct icl_pdu *request)
576{
577 struct iscsi_bhs_task_management_request *bhstmr;
578 struct iscsi_bhs_task_management_response *bhstmr2;
579 struct icl_pdu *response;
580 struct cfiscsi_session *cs;
581 union ctl_io *io;
582 int error;
583
584 cs = PDU_SESSION(request);
585 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs;
586 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref);
587 ctl_zero_io(io);
588 PRIV_REQUEST(io) = request;
589 io->io_hdr.io_type = CTL_IO_TASK;
590 io->io_hdr.nexus.initid = cs->cs_ctl_initid;
591 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port;
592 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun));
593 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */
594
595 switch (bhstmr->bhstmr_function & ~0x80) {
596 case BHSTMR_FUNCTION_ABORT_TASK:
597#if 0
598 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK");
599#endif
600 io->taskio.task_action = CTL_TASK_ABORT_TASK;
601 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag;
602 break;
603 case BHSTMR_FUNCTION_ABORT_TASK_SET:
604#if 0
605 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET");
606#endif
607 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET;
608 break;
609 case BHSTMR_FUNCTION_CLEAR_TASK_SET:
610#if 0
611 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET");
612#endif
613 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET;
614 break;
615 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET:
616#if 0
617 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET");
618#endif
619 io->taskio.task_action = CTL_TASK_LUN_RESET;
620 break;
621 case BHSTMR_FUNCTION_TARGET_WARM_RESET:
622#if 0
623 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET");
624#endif
625 io->taskio.task_action = CTL_TASK_TARGET_RESET;
626 break;
627 case BHSTMR_FUNCTION_TARGET_COLD_RESET:
628#if 0
629 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET");
630#endif
631 io->taskio.task_action = CTL_TASK_TARGET_RESET;
632 break;
633 case BHSTMR_FUNCTION_QUERY_TASK:
634#if 0
635 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK");
636#endif
637 io->taskio.task_action = CTL_TASK_QUERY_TASK;
638 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag;
639 break;
640 case BHSTMR_FUNCTION_QUERY_TASK_SET:
641#if 0
642 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET");
643#endif
644 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET;
645 break;
646 case BHSTMR_FUNCTION_I_T_NEXUS_RESET:
647#if 0
648 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET");
649#endif
650 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET;
651 break;
652 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT:
653#if 0
654 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT");
655#endif
656 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT;
657 break;
658 default:
659 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x",
660 bhstmr->bhstmr_function & ~0x80);
661 ctl_free_io(io);
662
663 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
664 if (response == NULL) {
665 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
666 "dropping connection");
667 icl_pdu_free(request);
668 cfiscsi_session_terminate(cs);
669 return;
670 }
671 bhstmr2 = (struct iscsi_bhs_task_management_response *)
672 response->ip_bhs;
673 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE;
674 bhstmr2->bhstmr_flags = 0x80;
675 bhstmr2->bhstmr_response =
676 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED;
677 bhstmr2->bhstmr_initiator_task_tag =
678 bhstmr->bhstmr_initiator_task_tag;
679 icl_pdu_free(request);
680 cfiscsi_pdu_queue(response);
681 return;
682 }
683
684 refcount_acquire(&cs->cs_outstanding_ctl_pdus);
685 error = ctl_run(io);
686 if (error != CTL_RETVAL_COMPLETE) {
687 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; "
688 "dropping connection", error);
689 ctl_free_io(io);
690 refcount_release(&cs->cs_outstanding_ctl_pdus);
691 icl_pdu_free(request);
692 cfiscsi_session_terminate(cs);
693 }
694}
695
696static bool
697cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw)
698{
699 struct iscsi_bhs_data_out *bhsdo;
700 struct cfiscsi_session *cs;
701 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
702 size_t copy_len, len, off, buffer_offset;
703 int ctl_sg_count;
704 union ctl_io *io;
705
706 cs = PDU_SESSION(request);
707
708 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
709 ISCSI_BHS_OPCODE_SCSI_DATA_OUT ||
710 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
711 ISCSI_BHS_OPCODE_SCSI_COMMAND,
712 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode));
713
714 /*
715 * We're only using fields common for Data-Out and SCSI Command PDUs.
716 */
717 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs;
718
719 io = cdw->cdw_ctl_io;
720 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN,
721 ("CTL_FLAG_DATA_IN"));
722
723#if 0
724 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d",
725 request->ip_data_len, io->scsiio.kern_total_len);
726#endif
727
728 if (io->scsiio.kern_sg_entries > 0) {
729 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
730 ctl_sg_count = io->scsiio.kern_sg_entries;
731 } else {
732 ctl_sglist = &ctl_sg_entry;
733 ctl_sglist->addr = io->scsiio.kern_data_ptr;
734 ctl_sglist->len = io->scsiio.kern_data_len;
735 ctl_sg_count = 1;
736 }
737
738 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
739 ISCSI_BHS_OPCODE_SCSI_DATA_OUT)
740 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset);
741 else
742 buffer_offset = 0;
743 len = icl_pdu_data_segment_length(request);
744
745 /*
746 * Make sure the offset, as sent by the initiator, matches the offset
747 * we're supposed to be at in the scatter-gather list.
748 */
749 if (buffer_offset >
750 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled ||
751 buffer_offset + len <=
752 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) {
753 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, "
754 "expected %zd; dropping connection", buffer_offset,
755 (size_t)io->scsiio.kern_rel_offset +
756 (size_t)io->scsiio.ext_data_filled);
757 ctl_set_data_phase_error(&io->scsiio);
758 cfiscsi_session_terminate(cs);
759 return (true);
760 }
761
762 /*
763 * This is the offset within the PDU data segment, as opposed
764 * to buffer_offset, which is the offset within the task (SCSI
765 * command).
766 */
767 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled -
768 buffer_offset;
769
770 /*
771 * Iterate over the scatter/gather segments, filling them with data
772 * from the PDU data segment. Note that this can get called multiple
773 * times for one SCSI command; the cdw structure holds state for the
774 * scatter/gather list.
775 */
776 for (;;) {
777 KASSERT(cdw->cdw_sg_index < ctl_sg_count,
778 ("cdw->cdw_sg_index >= ctl_sg_count"));
779 if (cdw->cdw_sg_len == 0) {
780 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr;
781 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len;
782 }
783 KASSERT(off <= len, ("len > off"));
784 copy_len = len - off;
785 if (copy_len > cdw->cdw_sg_len)
786 copy_len = cdw->cdw_sg_len;
787
788 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len);
789 cdw->cdw_sg_addr += copy_len;
790 cdw->cdw_sg_len -= copy_len;
791 off += copy_len;
792 io->scsiio.ext_data_filled += copy_len;
793 io->scsiio.kern_data_resid -= copy_len;
794
795 if (cdw->cdw_sg_len == 0) {
796 /*
797 * End of current segment.
798 */
799 if (cdw->cdw_sg_index == ctl_sg_count - 1) {
800 /*
801 * Last segment in scatter/gather list.
802 */
803 break;
804 }
805 cdw->cdw_sg_index++;
806 }
807
808 if (off == len) {
809 /*
810 * End of PDU payload.
811 */
812 break;
813 }
814 }
815
816 if (len > off) {
817 /*
818 * In case of unsolicited data, it's possible that the buffer
819 * provided by CTL is smaller than negotiated FirstBurstLength.
820 * Just ignore the superfluous data; will ask for them with R2T
821 * on next call to cfiscsi_datamove().
822 *
823 * This obviously can only happen with SCSI Command PDU.
824 */
825 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
826 ISCSI_BHS_OPCODE_SCSI_COMMAND)
827 return (true);
828
829 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, "
830 "expected %zd; dropping connection",
831 icl_pdu_data_segment_length(request), off);
832 ctl_set_data_phase_error(&io->scsiio);
833 cfiscsi_session_terminate(cs);
834 return (true);
835 }
836
837 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end &&
838 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) {
839 CFISCSI_SESSION_WARN(cs, "got the final packet without "
840 "the F flag; flags = 0x%x; dropping connection",
841 bhsdo->bhsdo_flags);
842 ctl_set_data_phase_error(&io->scsiio);
843 cfiscsi_session_terminate(cs);
844 return (true);
845 }
846
847 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end &&
848 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) {
849 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
850 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) {
851 CFISCSI_SESSION_WARN(cs, "got the final packet, but the "
852 "transmitted size was %zd bytes instead of %d; "
853 "dropping connection",
854 (size_t)io->scsiio.ext_data_filled,
855 cdw->cdw_r2t_end);
856 ctl_set_data_phase_error(&io->scsiio);
857 cfiscsi_session_terminate(cs);
858 return (true);
859 } else {
860 /*
861 * For SCSI Command PDU, this just means we need to
862 * solicit more data by sending R2T.
863 */
864 return (false);
865 }
866 }
867
868 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) {
869#if 0
870 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target "
871 "transfer tag 0x%x", cdw->cdw_target_transfer_tag);
872#endif
873
874 return (true);
875 }
876
877 return (false);
878}
879
880static void
881cfiscsi_pdu_handle_data_out(struct icl_pdu *request)
882{
883 struct iscsi_bhs_data_out *bhsdo;
884 struct cfiscsi_session *cs;
885 struct cfiscsi_data_wait *cdw = NULL;
886 union ctl_io *io;
887 bool done;
888
889 cs = PDU_SESSION(request);
890 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs;
891
892 CFISCSI_SESSION_LOCK(cs);
893 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) {
894#if 0
895 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for "
896 "ttt 0x%x, itt 0x%x",
897 bhsdo->bhsdo_target_transfer_tag,
898 bhsdo->bhsdo_initiator_task_tag,
899 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag));
900#endif
901 if (bhsdo->bhsdo_target_transfer_tag ==
902 cdw->cdw_target_transfer_tag)
903 break;
904 }
905 CFISCSI_SESSION_UNLOCK(cs);
906 if (cdw == NULL) {
907 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag "
908 "0x%x, not found; dropping connection",
909 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag);
910 icl_pdu_free(request);
911 cfiscsi_session_terminate(cs);
912 return;
913 }
914
915 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) {
916 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with "
917 "DataSN %u, while expected %u; dropping connection",
918 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn);
919 icl_pdu_free(request);
920 cfiscsi_session_terminate(cs);
921 return;
922 }
923 cdw->cdw_datasn += request->ip_additional_pdus + 1;
924
925 io = cdw->cdw_ctl_io;
926 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN,
927 ("CTL_FLAG_DATA_IN"));
928
929 done = cfiscsi_handle_data_segment(request, cdw);
930 if (done) {
931 CFISCSI_SESSION_LOCK(cs);
932 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next);
933 CFISCSI_SESSION_UNLOCK(cs);
934 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end ||
935 io->scsiio.ext_data_filled == io->scsiio.kern_data_len);
936 cfiscsi_data_wait_free(cs, cdw);
937 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG;
938 if (done)
939 ctl_datamove_done(io, false);
940 else
941 cfiscsi_datamove_out(io);
942 }
943
944 icl_pdu_free(request);
945}
946
947static void
948cfiscsi_pdu_handle_logout_request(struct icl_pdu *request)
949{
950 struct iscsi_bhs_logout_request *bhslr;
951 struct iscsi_bhs_logout_response *bhslr2;
952 struct icl_pdu *response;
953 struct cfiscsi_session *cs;
954
955 cs = PDU_SESSION(request);
956 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs;
957 switch (bhslr->bhslr_reason & 0x7f) {
958 case BHSLR_REASON_CLOSE_SESSION:
959 case BHSLR_REASON_CLOSE_CONNECTION:
960 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
961 if (response == NULL) {
962 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory");
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_CLOSED_SUCCESSFULLY;
971 bhslr2->bhslr_initiator_task_tag =
972 bhslr->bhslr_initiator_task_tag;
973 icl_pdu_free(request);
974 cfiscsi_pdu_queue(response);
975 cfiscsi_session_terminate(cs);
976 break;
977 case BHSLR_REASON_REMOVE_FOR_RECOVERY:
978 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
979 if (response == NULL) {
980 CFISCSI_SESSION_WARN(cs,
981 "failed to allocate memory; dropping connection");
982 icl_pdu_free(request);
983 cfiscsi_session_terminate(cs);
984 return;
985 }
986 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs;
987 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE;
988 bhslr2->bhslr_flags = 0x80;
989 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED;
990 bhslr2->bhslr_initiator_task_tag =
991 bhslr->bhslr_initiator_task_tag;
992 icl_pdu_free(request);
993 cfiscsi_pdu_queue(response);
994 break;
995 default:
996 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection",
997 bhslr->bhslr_reason);
998 icl_pdu_free(request);
999 cfiscsi_session_terminate(cs);
1000 break;
1001 }
1002}
1003
1004static void
1005cfiscsi_callout(void *context)
1006{
1007 struct icl_pdu *cp;
1008 struct iscsi_bhs_nop_in *bhsni;
1009 struct cfiscsi_session *cs;
1010
1011 cs = context;
1012
1013 if (cs->cs_terminating)
1014 return;
1015
1016 callout_schedule(&cs->cs_callout, 1 * hz);
1017
1018 atomic_add_int(&cs->cs_timeout, 1);
1019
1020#ifdef ICL_KERNEL_PROXY
1021 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) {
1022 if (login_timeout > 0 && cs->cs_timeout > login_timeout) {
1023 CFISCSI_SESSION_WARN(cs, "login timed out after "
1024 "%d seconds; dropping connection", cs->cs_timeout);
1025 cfiscsi_session_terminate(cs);
1026 }
1027 return;
1028 }
1029#endif
1030
1031 if (ping_timeout <= 0) {
1032 /*
1033 * Pings are disabled. Don't send NOP-In in this case;
1034 * user might have disabled pings to work around problems
1035 * with certain initiators that can't properly handle
1036 * NOP-In, such as iPXE. Reset the timeout, to avoid
1037 * triggering reconnection, should the user decide to
1038 * reenable them.
1039 */
1040 cs->cs_timeout = 0;
1041 return;
1042 }
1043
1044 if (cs->cs_timeout >= ping_timeout) {
1045 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; "
1046 "dropping connection", ping_timeout);
1047 cfiscsi_session_terminate(cs);
1048 return;
1049 }
1050
1051 /*
1052 * If the ping was reset less than one second ago - which means
1053 * that we've received some PDU during the last second - assume
1054 * the traffic flows correctly and don't bother sending a NOP-Out.
1055 *
1056 * (It's 2 - one for one second, and one for incrementing is_timeout
1057 * earlier in this routine.)
1058 */
1059 if (cs->cs_timeout < 2)
1060 return;
1061
1062 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT);
1063 if (cp == NULL) {
1064 CFISCSI_SESSION_WARN(cs, "failed to allocate memory");
1065 return;
1066 }
1067 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs;
1068 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN;
1069 bhsni->bhsni_flags = 0x80;
1070 bhsni->bhsni_initiator_task_tag = 0xffffffff;
1071
1072 cfiscsi_pdu_queue(cp);
1073}
1074
1075static struct cfiscsi_data_wait *
1076cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io,
1077 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp)
1078{
1079 struct cfiscsi_data_wait *cdw;
1080 int error;
1081
1082 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO);
1083 if (cdw == NULL) {
1084 CFISCSI_SESSION_WARN(cs,
1085 "failed to allocate %zd bytes", sizeof(*cdw));
1086 return (NULL);
1087 }
1088
1089 error = icl_conn_transfer_setup(cs->cs_conn, PRIV_REQUEST(io), io,
1090 target_transfer_tagp, &cdw->cdw_icl_prv);
1091 if (error != 0) {
1092 CFISCSI_SESSION_WARN(cs,
1093 "icl_conn_transfer_setup() failed with error %d", error);
1094 uma_zfree(cfiscsi_data_wait_zone, cdw);
1095 return (NULL);
1096 }
1097
1098 cdw->cdw_ctl_io = io;
1099 cdw->cdw_target_transfer_tag = *target_transfer_tagp;
1100 cdw->cdw_initiator_task_tag = initiator_task_tag;
1101
1102 return (cdw);
1103}
1104
1105static void
1106cfiscsi_data_wait_free(struct cfiscsi_session *cs,
1107 struct cfiscsi_data_wait *cdw)
1108{
1109
1110 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv);
1111 uma_zfree(cfiscsi_data_wait_zone, cdw);
1112}
1113
1114static void
1115cfiscsi_data_wait_abort(struct cfiscsi_session *cs,
1116 struct cfiscsi_data_wait *cdw, int status)
1117{
1118 union ctl_io *cdw_io;
1119
1120 /*
1121 * Set nonzero port status; this prevents backends from
1122 * assuming that the data transfer actually succeeded
1123 * and writing uninitialized data to disk.
1124 */
1125 MPASS(status != 0);
1126 cdw_io = cdw->cdw_ctl_io;
1127 cdw_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG;
1128 cdw_io->scsiio.io_hdr.port_status = status;
1129 cfiscsi_data_wait_free(cs, cdw);
1130 ctl_datamove_done(cdw_io, false);
1131}
1132
1133static void
1134cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs)
1135{
1136 struct cfiscsi_data_wait *cdw;
1137 struct icl_pdu *ip;
1138 union ctl_io *io;
1139 int error, last, wait;
1140
1141 if (cs->cs_target == NULL)
1142 return; /* No target yet, so nothing to do. */
1143 ip = icl_pdu_new(cs->cs_conn, M_WAITOK);
1144 ip->ip_bhs->bhs_opcode = ISCSI_BHS_OPCODE_INTERNAL;
1145 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref);
1146 ctl_zero_io(io);
1147 PRIV_REQUEST(io) = ip;
1148 io->io_hdr.io_type = CTL_IO_TASK;
1149 io->io_hdr.nexus.initid = cs->cs_ctl_initid;
1150 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port;
1151 io->io_hdr.nexus.targ_lun = 0;
1152 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */
1153 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET;
1154 wait = cs->cs_outstanding_ctl_pdus;
1155 refcount_acquire(&cs->cs_outstanding_ctl_pdus);
1156 error = ctl_run(io);
1157 if (error != CTL_RETVAL_COMPLETE) {
1158 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d", error);
1159 refcount_release(&cs->cs_outstanding_ctl_pdus);
1160 ctl_free_io(io);
1161 icl_pdu_free(ip);
1162 }
1163
1164 CFISCSI_SESSION_LOCK(cs);
1165 cs->cs_terminating_tasks = true;
1166 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) {
1167 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next);
1168 CFISCSI_SESSION_UNLOCK(cs);
1169 cfiscsi_data_wait_abort(cs, cdw, 42);
1170 CFISCSI_SESSION_LOCK(cs);
1171 }
1172 CFISCSI_SESSION_UNLOCK(cs);
1173
1174 /*
1175 * Wait for CTL to terminate all the tasks.
1176 */
1177 if (wait > 0)
1178 CFISCSI_SESSION_WARN(cs,
1179 "waiting for CTL to terminate %d tasks", wait);
1180 for (;;) {
1181 refcount_acquire(&cs->cs_outstanding_ctl_pdus);
1182 last = refcount_release(&cs->cs_outstanding_ctl_pdus);
1183 if (last != 0)
1184 break;
1185 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus),
1186 0, "cfiscsi_terminate", hz / 100);
1187 }
1188 if (wait > 0)
1189 CFISCSI_SESSION_WARN(cs, "tasks terminated");
1190}
1191
1192static void
1193cfiscsi_maintenance_thread(void *arg)
1194{
1195 struct cfiscsi_session *cs;
1196
1197 cs = arg;
1198
1199 for (;;) {
1200 CFISCSI_SESSION_LOCK(cs);
1201 if (cs->cs_terminating == false || cs->cs_handoff_in_progress)
1202 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock);
1203 CFISCSI_SESSION_UNLOCK(cs);
1204
1205 if (cs->cs_terminating && cs->cs_handoff_in_progress == false) {
1206 /*
1207 * We used to wait up to 30 seconds to deliver queued
1208 * PDUs to the initiator. We also tried hard to deliver
1209 * SCSI Responses for the aborted PDUs. We don't do
1210 * that anymore. We might need to revisit that.
1211 */
1212 callout_drain(&cs->cs_callout);
1213 icl_conn_close(cs->cs_conn);
1214
1215 /*
1216 * At this point ICL receive thread is no longer
1217 * running; no new tasks can be queued.
1218 */
1219 cfiscsi_session_terminate_tasks(cs);
1220 cfiscsi_session_delete(cs);
1221 kthread_exit();
1222 return;
1223 }
1224 CFISCSI_SESSION_DEBUG(cs, "nothing to do");
1225 }
1226}
1227
1228static void
1229cfiscsi_session_terminate(struct cfiscsi_session *cs)
1230{
1231
1232 cs->cs_terminating = true;
1233 cv_signal(&cs->cs_maintenance_cv);
1234#ifdef ICL_KERNEL_PROXY
1235 cv_signal(&cs->cs_login_cv);
1236#endif
1237}
1238
1239static int
1240cfiscsi_session_register_initiator(struct cfiscsi_session *cs)
1241{
1242 struct cfiscsi_target *ct;
1243 char *name;
1244 int i;
1245
1246 KASSERT(cs->cs_ctl_initid == -1, ("already registered"));
1247
1248 ct = cs->cs_target;
1249 name = strdup(cs->cs_initiator_id, M_CTL);
1250 i = ctl_add_initiator(&ct->ct_port, -1, 0, name);
1251 if (i < 0) {
1252 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d",
1253 i);
1254 cs->cs_ctl_initid = -1;
1255 return (1);
1256 }
1257 cs->cs_ctl_initid = i;
1258#if 0
1259 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i);
1260#endif
1261
1262 return (0);
1263}
1264
1265static void
1266cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs)
1267{
1268 int error;
1269
1270 if (cs->cs_ctl_initid == -1)
1271 return;
1272
1273 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid);
1274 if (error != 0) {
1275 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d",
1276 error);
1277 }
1278 cs->cs_ctl_initid = -1;
1279}
1280
1281static struct cfiscsi_session *
1282cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload)
1283{
1284 struct cfiscsi_session *cs;
1285 int error;
1286
1287 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO);
1288 if (cs == NULL) {
1289 CFISCSI_WARN("malloc failed");
1290 return (NULL);
1291 }
1292 cs->cs_ctl_initid = -1;
1293
1294 refcount_init(&cs->cs_outstanding_ctl_pdus, 0);
1295 TAILQ_INIT(&cs->cs_waiting_for_data_out);
1296 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF);
1297 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt");
1298#ifdef ICL_KERNEL_PROXY
1299 cv_init(&cs->cs_login_cv, "cfiscsi_login");
1300#endif
1301
1302 /*
1303 * The purpose of this is to avoid racing with session shutdown.
1304 * Otherwise we could have the maintenance thread call icl_conn_close()
1305 * before we call icl_conn_handoff().
1306 */
1307 cs->cs_handoff_in_progress = true;
1308
1309 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock);
1310 if (cs->cs_conn == NULL) {
1311 free(cs, M_CFISCSI);
1312 return (NULL);
1313 }
1314 cs->cs_conn->ic_receive = cfiscsi_receive_callback;
1315 cs->cs_conn->ic_error = cfiscsi_error_callback;
1316 cs->cs_conn->ic_prv0 = cs;
1317
1318 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt");
1319 if (error != 0) {
1320 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error);
1321 free(cs, M_CFISCSI);
1322 return (NULL);
1323 }
1324
1325 mtx_lock(&softc->lock);
1326 cs->cs_id = ++softc->last_session_id;
1327 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next);
1328 mtx_unlock(&softc->lock);
1329
1330 /*
1331 * Start pinging the initiator.
1332 */
1333 callout_init(&cs->cs_callout, 1);
1334 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs);
1335
1336 return (cs);
1337}
1338
1339static void
1340cfiscsi_session_delete(struct cfiscsi_session *cs)
1341{
1342 struct cfiscsi_softc *softc;
1343
1344 softc = &cfiscsi_softc;
1345
1346 KASSERT(cs->cs_outstanding_ctl_pdus == 0,
1347 ("destroying session with outstanding CTL pdus"));
1348 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out),
1349 ("destroying session with non-empty queue"));
1350
1351 mtx_lock(&softc->lock);
1352 TAILQ_REMOVE(&softc->sessions, cs, cs_next);
1353 mtx_unlock(&softc->lock);
1354
1355 cfiscsi_session_unregister_initiator(cs);
1356 if (cs->cs_target != NULL)
1357 cfiscsi_target_release(cs->cs_target);
1358 icl_conn_close(cs->cs_conn);
1359 icl_conn_free(cs->cs_conn);
1360 free(cs, M_CFISCSI);
1361 cv_signal(&softc->sessions_cv);
1362}
1363
1364static int
1365cfiscsi_init(void)
1366{
1367 struct cfiscsi_softc *softc;
1368
1369 softc = &cfiscsi_softc;
1370 bzero(softc, sizeof(*softc));
1371 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF);
1372
1373 cv_init(&softc->sessions_cv, "cfiscsi_sessions");
1374#ifdef ICL_KERNEL_PROXY
1375 cv_init(&softc->accept_cv, "cfiscsi_accept");
1376#endif
1377 TAILQ_INIT(&softc->sessions);
1378 TAILQ_INIT(&softc->targets);
1379
1380 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait",
1381 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL,
1382 UMA_ALIGN_PTR, 0);
1383
1384 return (0);
1385}
1386
1387static int
1388cfiscsi_shutdown(void)
1389{
1390 struct cfiscsi_softc *softc = &cfiscsi_softc;
1391
1392 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets))
1393 return (EBUSY);
1394
1395 uma_zdestroy(cfiscsi_data_wait_zone);
1396#ifdef ICL_KERNEL_PROXY
1397 cv_destroy(&softc->accept_cv);
1398#endif
1399 cv_destroy(&softc->sessions_cv);
1400 mtx_destroy(&softc->lock);
1401 return (0);
1402}
1403
1404#ifdef ICL_KERNEL_PROXY
1405static void
1406cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id)
1407{
1408 struct cfiscsi_session *cs;
1409
1410 cs = cfiscsi_session_new(&cfiscsi_softc, NULL);
1411 if (cs == NULL) {
1412 CFISCSI_WARN("failed to create session");
1413 return;
1414 }
1415
1416 icl_conn_handoff_sock(cs->cs_conn, so);
1417 cs->cs_initiator_sa = sa;
1418 cs->cs_portal_id = portal_id;
1419 cs->cs_handoff_in_progress = false;
1420 cs->cs_waiting_for_ctld = true;
1421 cv_signal(&cfiscsi_softc.accept_cv);
1422
1423 CFISCSI_SESSION_LOCK(cs);
1424 /*
1425 * Wake up the maintenance thread if we got scheduled for termination
1426 * somewhere between cfiscsi_session_new() and icl_conn_handoff_sock().
1427 */
1428 if (cs->cs_terminating)
1429 cfiscsi_session_terminate(cs);
1430 CFISCSI_SESSION_UNLOCK(cs);
1431}
1432#endif
1433
1434static void
1435cfiscsi_online(void *arg)
1436{
1437 struct cfiscsi_softc *softc;
1438 struct cfiscsi_target *ct;
1439 int online;
1440
1441 ct = (struct cfiscsi_target *)arg;
1442 softc = ct->ct_softc;
1443
1444 mtx_lock(&softc->lock);
1445 if (ct->ct_online) {
1446 mtx_unlock(&softc->lock);
1447 return;
1448 }
1449 ct->ct_online = 1;
1450 online = softc->online++;
1451 mtx_unlock(&softc->lock);
1452 if (online > 0)
1453 return;
1454
1455#ifdef ICL_KERNEL_PROXY
1456 if (softc->listener != NULL)
1457 icl_listen_free(softc->listener);
1458 softc->listener = icl_listen_new(cfiscsi_accept);
1459#endif
1460}
1461
1462static void
1463cfiscsi_offline(void *arg)
1464{
1465 struct cfiscsi_softc *softc;
1466 struct cfiscsi_target *ct;
1467 struct cfiscsi_session *cs;
1468 int error, online;
1469
1470 ct = (struct cfiscsi_target *)arg;
1471 softc = ct->ct_softc;
1472
1473 mtx_lock(&softc->lock);
1474 if (!ct->ct_online) {
1475 mtx_unlock(&softc->lock);
1476 return;
1477 }
1478 ct->ct_online = 0;
1479 online = --softc->online;
1480
1481 do {
1482 TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1483 if (cs->cs_target == ct)
1484 cfiscsi_session_terminate(cs);
1485 }
1486 TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1487 if (cs->cs_target == ct)
1488 break;
1489 }
1490 if (cs != NULL) {
1491 error = cv_wait_sig(&softc->sessions_cv, &softc->lock);
1492 if (error != 0) {
1493 CFISCSI_SESSION_DEBUG(cs,
1494 "cv_wait failed with error %d\n", error);
1495 break;
1496 }
1497 }
1498 } while (cs != NULL && ct->ct_online == 0);
1499 mtx_unlock(&softc->lock);
1500 if (online > 0)
1501 return;
1502
1503#ifdef ICL_KERNEL_PROXY
1504 icl_listen_free(softc->listener);
1505 softc->listener = NULL;
1506#endif
1507}
1508
1509static int
1510cfiscsi_info(void *arg, struct sbuf *sb)
1511{
1512 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg;
1513 int retval;
1514
1515 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n",
1516 ct->ct_state);
1517 return (retval);
1518}
1519
1520static void
1521cfiscsi_ioctl_handoff(struct ctl_iscsi *ci)
1522{
1523 struct cfiscsi_softc *softc;
1524 struct cfiscsi_session *cs, *cs2;
1525 struct cfiscsi_target *ct;
1526 struct ctl_iscsi_handoff_params *cihp;
1527 int error;
1528
1529 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data);
1530 softc = &cfiscsi_softc;
1531
1532 CFISCSI_DEBUG("new connection from %s (%s) to %s",
1533 cihp->initiator_name, cihp->initiator_addr,
1534 cihp->target_name);
1535
1536 ct = cfiscsi_target_find(softc, cihp->target_name,
1537 cihp->portal_group_tag);
1538 if (ct == NULL) {
1539 ci->status = CTL_ISCSI_ERROR;
1540 snprintf(ci->error_str, sizeof(ci->error_str),
1541 "%s: target not found", __func__);
1542 return;
1543 }
1544
1545#ifdef ICL_KERNEL_PROXY
1546 if (cihp->socket > 0 && cihp->connection_id > 0) {
1547 snprintf(ci->error_str, sizeof(ci->error_str),
1548 "both socket and connection_id set");
1549 ci->status = CTL_ISCSI_ERROR;
1550 cfiscsi_target_release(ct);
1551 return;
1552 }
1553 if (cihp->socket == 0) {
1554 mtx_lock(&cfiscsi_softc.lock);
1555 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1556 if (cs->cs_id == cihp->connection_id)
1557 break;
1558 }
1559 if (cs == NULL) {
1560 mtx_unlock(&cfiscsi_softc.lock);
1561 snprintf(ci->error_str, sizeof(ci->error_str),
1562 "connection not found");
1563 ci->status = CTL_ISCSI_ERROR;
1564 cfiscsi_target_release(ct);
1565 return;
1566 }
1567 mtx_unlock(&cfiscsi_softc.lock);
1568 } else {
1569#endif
1570 cs = cfiscsi_session_new(softc, cihp->offload);
1571 if (cs == NULL) {
1572 ci->status = CTL_ISCSI_ERROR;
1573 snprintf(ci->error_str, sizeof(ci->error_str),
1574 "%s: cfiscsi_session_new failed", __func__);
1575 cfiscsi_target_release(ct);
1576 return;
1577 }
1578#ifdef ICL_KERNEL_PROXY
1579 }
1580#endif
1581
1582 /*
1583 * First PDU of Full Feature phase has the same CmdSN as the last
1584 * PDU from the Login Phase received from the initiator. Thus,
1585 * the -1 below.
1586 */
1587 cs->cs_cmdsn = cihp->cmdsn;
1588 cs->cs_statsn = cihp->statsn;
1589 cs->cs_conn->ic_max_recv_data_segment_length =
1590 cihp->max_recv_data_segment_length;
1591 cs->cs_conn->ic_max_send_data_segment_length =
1592 cihp->max_send_data_segment_length;
1593 cs->cs_max_burst_length = cihp->max_burst_length;
1594 cs->cs_first_burst_length = cihp->first_burst_length;
1595 cs->cs_immediate_data = !!cihp->immediate_data;
1596 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C)
1597 cs->cs_conn->ic_header_crc32c = true;
1598 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C)
1599 cs->cs_conn->ic_data_crc32c = true;
1600
1601 strlcpy(cs->cs_initiator_name,
1602 cihp->initiator_name, sizeof(cs->cs_initiator_name));
1603 strlcpy(cs->cs_initiator_addr,
1604 cihp->initiator_addr, sizeof(cs->cs_initiator_addr));
1605 strlcpy(cs->cs_initiator_alias,
1606 cihp->initiator_alias, sizeof(cs->cs_initiator_alias));
1607 memcpy(cs->cs_initiator_isid,
1608 cihp->initiator_isid, sizeof(cs->cs_initiator_isid));
1609 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id),
1610 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name,
1611 cihp->initiator_isid[0], cihp->initiator_isid[1],
1612 cihp->initiator_isid[2], cihp->initiator_isid[3],
1613 cihp->initiator_isid[4], cihp->initiator_isid[5]);
1614
1615 mtx_lock(&softc->lock);
1616 if (ct->ct_online == 0) {
1617 mtx_unlock(&softc->lock);
1618 CFISCSI_SESSION_LOCK(cs);
1619 cs->cs_handoff_in_progress = false;
1620 cfiscsi_session_terminate(cs);
1621 CFISCSI_SESSION_UNLOCK(cs);
1622 cfiscsi_target_release(ct);
1623 ci->status = CTL_ISCSI_ERROR;
1624 snprintf(ci->error_str, sizeof(ci->error_str),
1625 "%s: port offline", __func__);
1626 return;
1627 }
1628 cs->cs_target = ct;
1629 mtx_unlock(&softc->lock);
1630
1631restart:
1632 if (!cs->cs_terminating) {
1633 mtx_lock(&softc->lock);
1634 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) {
1635 if (cs2 != cs && cs2->cs_tasks_aborted == false &&
1636 cs->cs_target == cs2->cs_target &&
1637 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) {
1638 if (strcmp(cs->cs_initiator_addr,
1639 cs2->cs_initiator_addr) != 0) {
1640 CFISCSI_SESSION_WARN(cs2,
1641 "session reinstatement from "
1642 "different address %s",
1643 cs->cs_initiator_addr);
1644 } else {
1645 CFISCSI_SESSION_DEBUG(cs2,
1646 "session reinstatement");
1647 }
1648 cfiscsi_session_terminate(cs2);
1649 mtx_unlock(&softc->lock);
1650 pause("cfiscsi_reinstate", 1);
1651 goto restart;
1652 }
1653 }
1654 mtx_unlock(&softc->lock);
1655 }
1656
1657 /*
1658 * Register initiator with CTL.
1659 */
1660 cfiscsi_session_register_initiator(cs);
1661
1662#ifdef ICL_KERNEL_PROXY
1663 if (cihp->socket > 0) {
1664#endif
1665 error = icl_conn_handoff(cs->cs_conn, cihp->socket);
1666 if (error != 0) {
1667 CFISCSI_SESSION_LOCK(cs);
1668 cs->cs_handoff_in_progress = false;
1669 cfiscsi_session_terminate(cs);
1670 CFISCSI_SESSION_UNLOCK(cs);
1671 ci->status = CTL_ISCSI_ERROR;
1672 snprintf(ci->error_str, sizeof(ci->error_str),
1673 "%s: icl_conn_handoff failed with error %d",
1674 __func__, error);
1675 return;
1676 }
1677#ifdef ICL_KERNEL_PROXY
1678 }
1679#endif
1680
1681#ifdef ICL_KERNEL_PROXY
1682 cs->cs_login_phase = false;
1683
1684 /*
1685 * First PDU of the Full Feature phase has likely already arrived.
1686 * We have to pick it up and execute properly.
1687 */
1688 if (cs->cs_login_pdu != NULL) {
1689 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU");
1690 cfiscsi_pdu_handle(cs->cs_login_pdu);
1691 cs->cs_login_pdu = NULL;
1692 }
1693#endif
1694
1695 CFISCSI_SESSION_LOCK(cs);
1696 cs->cs_handoff_in_progress = false;
1697
1698 /*
1699 * Wake up the maintenance thread if we got scheduled for termination.
1700 */
1701 if (cs->cs_terminating)
1702 cfiscsi_session_terminate(cs);
1703 CFISCSI_SESSION_UNLOCK(cs);
1704
1705 ci->status = CTL_ISCSI_OK;
1706}
1707
1708static void
1709cfiscsi_ioctl_list(struct ctl_iscsi *ci)
1710{
1711 struct ctl_iscsi_list_params *cilp;
1712 struct cfiscsi_session *cs;
1713 struct cfiscsi_softc *softc;
1714 struct sbuf *sb;
1715 int error;
1716
1717 cilp = (struct ctl_iscsi_list_params *)&(ci->data);
1718 softc = &cfiscsi_softc;
1719
1720 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN);
1721 if (sb == NULL) {
1722 ci->status = CTL_ISCSI_ERROR;
1723 snprintf(ci->error_str, sizeof(ci->error_str),
1724 "Unable to allocate %d bytes for iSCSI session list",
1725 cilp->alloc_len);
1726 return;
1727 }
1728
1729 sbuf_printf(sb, "<ctlislist>\n");
1730 mtx_lock(&softc->lock);
1731 TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1732 if (cs->cs_target == NULL)
1733 continue;
1734 error = sbuf_printf(sb, "<connection id=\"%d\">"
1735 "<initiator>%s</initiator>"
1736 "<initiator_addr>%s</initiator_addr>"
1737 "<initiator_alias>%s</initiator_alias>"
1738 "<target>%s</target>"
1739 "<target_alias>%s</target_alias>"
1740 "<target_portal_group_tag>%u</target_portal_group_tag>"
1741 "<header_digest>%s</header_digest>"
1742 "<data_digest>%s</data_digest>"
1743 "<max_recv_data_segment_length>%d</max_recv_data_segment_length>"
1744 "<max_send_data_segment_length>%d</max_send_data_segment_length>"
1745 "<max_burst_length>%d</max_burst_length>"
1746 "<first_burst_length>%d</first_burst_length>"
1747 "<immediate_data>%d</immediate_data>"
1748 "<iser>%d</iser>"
1749 "<offload>%s</offload>"
1750 "</connection>\n",
1751 cs->cs_id,
1752 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias,
1753 cs->cs_target->ct_name, cs->cs_target->ct_alias,
1754 cs->cs_target->ct_tag,
1755 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None",
1756 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None",
1757 cs->cs_conn->ic_max_recv_data_segment_length,
1758 cs->cs_conn->ic_max_send_data_segment_length,
1759 cs->cs_max_burst_length,
1760 cs->cs_first_burst_length,
1761 cs->cs_immediate_data,
1762 cs->cs_conn->ic_iser,
1763 cs->cs_conn->ic_offload);
1764 if (error != 0)
1765 break;
1766 }
1767 mtx_unlock(&softc->lock);
1768 error = sbuf_printf(sb, "</ctlislist>\n");
1769 if (error != 0) {
1770 sbuf_delete(sb);
1771 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE;
1772 snprintf(ci->error_str, sizeof(ci->error_str),
1773 "Out of space, %d bytes is too small", cilp->alloc_len);
1774 return;
1775 }
1776 sbuf_finish(sb);
1777
1778 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1);
1779 if (error != 0) {
1780 sbuf_delete(sb);
1781 snprintf(ci->error_str, sizeof(ci->error_str),
1782 "copyout failed with error %d", error);
1783 ci->status = CTL_ISCSI_ERROR;
1784 return;
1785 }
1786 cilp->fill_len = sbuf_len(sb) + 1;
1787 ci->status = CTL_ISCSI_OK;
1788 sbuf_delete(sb);
1789}
1790
1791static void
1792cfiscsi_ioctl_logout(struct ctl_iscsi *ci)
1793{
1794 struct icl_pdu *response;
1795 struct iscsi_bhs_asynchronous_message *bhsam;
1796 struct ctl_iscsi_logout_params *cilp;
1797 struct cfiscsi_session *cs;
1798 struct cfiscsi_softc *softc;
1799 int found = 0;
1800
1801 cilp = (struct ctl_iscsi_logout_params *)&(ci->data);
1802 softc = &cfiscsi_softc;
1803
1804 mtx_lock(&softc->lock);
1805 TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1806 if (cilp->all == 0 && cs->cs_id != cilp->connection_id &&
1807 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 &&
1808 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0)
1809 continue;
1810
1811 response = icl_pdu_new(cs->cs_conn, M_NOWAIT);
1812 if (response == NULL) {
1813 ci->status = CTL_ISCSI_ERROR;
1814 snprintf(ci->error_str, sizeof(ci->error_str),
1815 "Unable to allocate memory");
1816 mtx_unlock(&softc->lock);
1817 return;
1818 }
1819 bhsam =
1820 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs;
1821 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE;
1822 bhsam->bhsam_flags = 0x80;
1823 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT;
1824 bhsam->bhsam_parameter3 = htons(10);
1825 cfiscsi_pdu_queue(response);
1826 found++;
1827 }
1828 mtx_unlock(&softc->lock);
1829
1830 if (found == 0) {
1831 ci->status = CTL_ISCSI_SESSION_NOT_FOUND;
1832 snprintf(ci->error_str, sizeof(ci->error_str),
1833 "No matching connections found");
1834 return;
1835 }
1836
1837 ci->status = CTL_ISCSI_OK;
1838}
1839
1840static void
1841cfiscsi_ioctl_terminate(struct ctl_iscsi *ci)
1842{
1843 struct icl_pdu *response;
1844 struct iscsi_bhs_asynchronous_message *bhsam;
1845 struct ctl_iscsi_terminate_params *citp;
1846 struct cfiscsi_session *cs;
1847 struct cfiscsi_softc *softc;
1848 int found = 0;
1849
1850 citp = (struct ctl_iscsi_terminate_params *)&(ci->data);
1851 softc = &cfiscsi_softc;
1852
1853 mtx_lock(&softc->lock);
1854 TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1855 if (citp->all == 0 && cs->cs_id != citp->connection_id &&
1856 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 &&
1857 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0)
1858 continue;
1859
1860 response = icl_pdu_new(cs->cs_conn, M_NOWAIT);
1861 if (response == NULL) {
1862 /*
1863 * Oh well. Just terminate the connection.
1864 */
1865 } else {
1866 bhsam = (struct iscsi_bhs_asynchronous_message *)
1867 response->ip_bhs;
1868 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE;
1869 bhsam->bhsam_flags = 0x80;
1870 bhsam->bhsam_0xffffffff = 0xffffffff;
1871 bhsam->bhsam_async_event =
1872 BHSAM_EVENT_TARGET_TERMINATES_SESSION;
1873 cfiscsi_pdu_queue(response);
1874 }
1875 cfiscsi_session_terminate(cs);
1876 found++;
1877 }
1878 mtx_unlock(&softc->lock);
1879
1880 if (found == 0) {
1881 ci->status = CTL_ISCSI_SESSION_NOT_FOUND;
1882 snprintf(ci->error_str, sizeof(ci->error_str),
1883 "No matching connections found");
1884 return;
1885 }
1886
1887 ci->status = CTL_ISCSI_OK;
1888}
1889
1890static void
1891cfiscsi_ioctl_limits(struct ctl_iscsi *ci)
1892{
1893 struct ctl_iscsi_limits_params *cilp;
1894 struct icl_drv_limits idl;
1895 int error;
1896
1897 cilp = (struct ctl_iscsi_limits_params *)&(ci->data);
1898
1899 error = icl_limits(cilp->offload, false, &idl);
1900 if (error != 0) {
1901 ci->status = CTL_ISCSI_ERROR;
1902 snprintf(ci->error_str, sizeof(ci->error_str),
1903 "%s: icl_limits failed with error %d",
1904 __func__, error);
1905 return;
1906 }
1907
1908 cilp->max_recv_data_segment_length =
1909 idl.idl_max_recv_data_segment_length;
1910 cilp->max_send_data_segment_length =
1911 idl.idl_max_send_data_segment_length;
1912 cilp->max_burst_length = idl.idl_max_burst_length;
1913 cilp->first_burst_length = idl.idl_first_burst_length;
1914
1915 ci->status = CTL_ISCSI_OK;
1916}
1917
1918#ifdef ICL_KERNEL_PROXY
1919static void
1920cfiscsi_ioctl_listen(struct ctl_iscsi *ci)
1921{
1922 struct ctl_iscsi_listen_params *cilp;
1923 struct sockaddr *sa;
1924 int error;
1925
1926 cilp = (struct ctl_iscsi_listen_params *)&(ci->data);
1927
1928 if (cfiscsi_softc.listener == NULL) {
1929 CFISCSI_DEBUG("no listener");
1930 snprintf(ci->error_str, sizeof(ci->error_str), "no listener");
1931 ci->status = CTL_ISCSI_ERROR;
1932 return;
1933 }
1934
1935 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen);
1936 if (error != 0) {
1937 CFISCSI_DEBUG("getsockaddr, error %d", error);
1938 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed");
1939 ci->status = CTL_ISCSI_ERROR;
1940 return;
1941 }
1942
1943 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain,
1944 cilp->socktype, cilp->protocol, sa, cilp->portal_id);
1945 if (error != 0) {
1946 free(sa, M_SONAME);
1947 CFISCSI_DEBUG("icl_listen_add, error %d", error);
1948 snprintf(ci->error_str, sizeof(ci->error_str),
1949 "icl_listen_add failed, error %d", error);
1950 ci->status = CTL_ISCSI_ERROR;
1951 return;
1952 }
1953
1954 ci->status = CTL_ISCSI_OK;
1955}
1956
1957static void
1958cfiscsi_ioctl_accept(struct ctl_iscsi *ci)
1959{
1960 struct ctl_iscsi_accept_params *ciap;
1961 struct cfiscsi_session *cs;
1962 int error;
1963
1964 ciap = (struct ctl_iscsi_accept_params *)&(ci->data);
1965
1966 mtx_lock(&cfiscsi_softc.lock);
1967 for (;;) {
1968 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1969 if (cs->cs_waiting_for_ctld)
1970 break;
1971 }
1972 if (cs != NULL)
1973 break;
1974 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock);
1975 if (error != 0) {
1976 mtx_unlock(&cfiscsi_softc.lock);
1977 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted");
1978 ci->status = CTL_ISCSI_ERROR;
1979 return;
1980 }
1981 }
1982 mtx_unlock(&cfiscsi_softc.lock);
1983
1984 cs->cs_waiting_for_ctld = false;
1985 cs->cs_login_phase = true;
1986
1987 ciap->connection_id = cs->cs_id;
1988 ciap->portal_id = cs->cs_portal_id;
1989 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len;
1990 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr,
1991 cs->cs_initiator_sa->sa_len);
1992 if (error != 0) {
1993 snprintf(ci->error_str, sizeof(ci->error_str),
1994 "copyout failed with error %d", error);
1995 ci->status = CTL_ISCSI_ERROR;
1996 return;
1997 }
1998
1999 ci->status = CTL_ISCSI_OK;
2000}
2001
2002static void
2003cfiscsi_ioctl_send(struct ctl_iscsi *ci)
2004{
2005 struct ctl_iscsi_send_params *cisp;
2006 struct cfiscsi_session *cs;
2007 struct icl_pdu *ip;
2008 size_t datalen;
2009 void *data;
2010 int error;
2011
2012 cisp = (struct ctl_iscsi_send_params *)&(ci->data);
2013
2014 mtx_lock(&cfiscsi_softc.lock);
2015 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
2016 if (cs->cs_id == cisp->connection_id)
2017 break;
2018 }
2019 if (cs == NULL) {
2020 mtx_unlock(&cfiscsi_softc.lock);
2021 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found");
2022 ci->status = CTL_ISCSI_ERROR;
2023 return;
2024 }
2025 mtx_unlock(&cfiscsi_softc.lock);
2026
2027#if 0
2028 if (cs->cs_login_phase == false)
2029 return (EBUSY);
2030#endif
2031
2032 if (cs->cs_terminating) {
2033 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating");
2034 ci->status = CTL_ISCSI_ERROR;
2035 return;
2036 }
2037
2038 datalen = cisp->data_segment_len;
2039 /*
2040 * XXX
2041 */
2042 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) {
2043 if (datalen > 65535) {
2044 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big");
2045 ci->status = CTL_ISCSI_ERROR;
2046 return;
2047 }
2048 if (datalen > 0) {
2049 data = malloc(datalen, M_CFISCSI, M_WAITOK);
2050 error = copyin(cisp->data_segment, data, datalen);
2051 if (error != 0) {
2052 free(data, M_CFISCSI);
2053 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error);
2054 ci->status = CTL_ISCSI_ERROR;
2055 return;
2056 }
2057 }
2058
2059 ip = icl_pdu_new(cs->cs_conn, M_WAITOK);
2060 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs));
2061 if (datalen > 0) {
2062 icl_pdu_append_data(ip, data, datalen, M_WAITOK);
2063 free(data, M_CFISCSI);
2064 }
2065 CFISCSI_SESSION_LOCK(cs);
2066 icl_pdu_queue(ip);
2067 CFISCSI_SESSION_UNLOCK(cs);
2068 ci->status = CTL_ISCSI_OK;
2069}
2070
2071static void
2072cfiscsi_ioctl_receive(struct ctl_iscsi *ci)
2073{
2074 struct ctl_iscsi_receive_params *cirp;
2075 struct cfiscsi_session *cs;
2076 struct icl_pdu *ip;
2077 void *data;
2078 int error;
2079
2080 cirp = (struct ctl_iscsi_receive_params *)&(ci->data);
2081
2082 mtx_lock(&cfiscsi_softc.lock);
2083 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
2084 if (cs->cs_id == cirp->connection_id)
2085 break;
2086 }
2087 if (cs == NULL) {
2088 mtx_unlock(&cfiscsi_softc.lock);
2089 snprintf(ci->error_str, sizeof(ci->error_str),
2090 "connection not found");
2091 ci->status = CTL_ISCSI_ERROR;
2092 return;
2093 }
2094 mtx_unlock(&cfiscsi_softc.lock);
2095
2096#if 0
2097 if (is->is_login_phase == false)
2098 return (EBUSY);
2099#endif
2100
2101 CFISCSI_SESSION_LOCK(cs);
2102 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) {
2103 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock);
2104 if (error != 0) {
2105 CFISCSI_SESSION_UNLOCK(cs);
2106 snprintf(ci->error_str, sizeof(ci->error_str),
2107 "interrupted by signal");
2108 ci->status = CTL_ISCSI_ERROR;
2109 return;
2110 }
2111 }
2112
2113 if (cs->cs_terminating) {
2114 CFISCSI_SESSION_UNLOCK(cs);
2115 snprintf(ci->error_str, sizeof(ci->error_str),
2116 "connection terminating");
2117 ci->status = CTL_ISCSI_ERROR;
2118 return;
2119 }
2120 ip = cs->cs_login_pdu;
2121 cs->cs_login_pdu = NULL;
2122 CFISCSI_SESSION_UNLOCK(cs);
2123
2124 if (ip->ip_data_len > cirp->data_segment_len) {
2125 icl_pdu_free(ip);
2126 snprintf(ci->error_str, sizeof(ci->error_str),
2127 "data segment too big");
2128 ci->status = CTL_ISCSI_ERROR;
2129 return;
2130 }
2131
2132 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs));
2133 if (ip->ip_data_len > 0) {
2134 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK);
2135 icl_pdu_get_data(ip, 0, data, ip->ip_data_len);
2136 copyout(data, cirp->data_segment, ip->ip_data_len);
2137 free(data, M_CFISCSI);
2138 }
2139
2140 icl_pdu_free(ip);
2141 ci->status = CTL_ISCSI_OK;
2142}
2143
2144#endif /* !ICL_KERNEL_PROXY */
2145
2146static void
2147cfiscsi_ioctl_port_create(struct ctl_req *req)
2148{
2149 struct cfiscsi_target *ct;
2150 struct ctl_port *port;
2151 const char *target, *alias, *val;
2152 struct scsi_vpd_id_descriptor *desc;
2153 int retval, len, idlen;
2154 uint16_t tag;
2155
2156 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL);
2157 alias = dnvlist_get_string(req->args_nvl, "cfiscsi_target_alias", NULL);
2158 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag",
2159 NULL);
2160
2161 if (target == NULL || val == NULL) {
2162 req->status = CTL_LUN_ERROR;
2163 snprintf(req->error_str, sizeof(req->error_str),
2164 "Missing required argument");
2165 return;
2166 }
2167
2168 tag = strtoul(val, NULL, 0);
2169 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag);
2170 if (ct == NULL) {
2171 req->status = CTL_LUN_ERROR;
2172 snprintf(req->error_str, sizeof(req->error_str),
2173 "failed to create target \"%s\"", target);
2174 return;
2175 }
2176 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) {
2177 req->status = CTL_LUN_ERROR;
2178 snprintf(req->error_str, sizeof(req->error_str),
2179 "target \"%s\" for portal group tag %u already exists",
2180 target, tag);
2181 cfiscsi_target_release(ct);
2182 return;
2183 }
2184 port = &ct->ct_port;
2185 // WAT
2186 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING)
2187 goto done;
2188
2189 port->frontend = &cfiscsi_frontend;
2190 port->port_type = CTL_PORT_ISCSI;
2191 /* XXX KDM what should the real number be here? */
2192 port->num_requested_ctl_io = 4096;
2193 port->port_name = "iscsi";
2194 port->physical_port = (int)tag;
2195 port->virtual_port = ct->ct_target_id;
2196 port->port_online = cfiscsi_online;
2197 port->port_offline = cfiscsi_offline;
2198 port->port_info = cfiscsi_info;
2199 port->onoff_arg = ct;
2200 port->fe_datamove = cfiscsi_datamove;
2201 port->fe_done = cfiscsi_done;
2202 port->targ_port = -1;
2203 port->options = nvlist_clone(req->args_nvl);
2204
2205 /* Generate Port ID. */
2206 idlen = strlen(target) + strlen(",t,0x0001") + 1;
2207 idlen = roundup2(idlen, 4);
2208 len = sizeof(struct scsi_vpd_device_id) + idlen;
2209 port->port_devid = malloc(sizeof(struct ctl_devid) + len,
2210 M_CTL, M_WAITOK | M_ZERO);
2211 port->port_devid->len = len;
2212 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data;
2213 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8;
2214 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT |
2215 SVPD_ID_TYPE_SCSI_NAME;
2216 desc->length = idlen;
2217 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag);
2218
2219 /* Generate Target ID. */
2220 idlen = strlen(target) + 1;
2221 idlen = roundup2(idlen, 4);
2222 len = sizeof(struct scsi_vpd_device_id) + idlen;
2223 port->target_devid = malloc(sizeof(struct ctl_devid) + len,
2224 M_CTL, M_WAITOK | M_ZERO);
2225 port->target_devid->len = len;
2226 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data;
2227 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8;
2228 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET |
2229 SVPD_ID_TYPE_SCSI_NAME;
2230 desc->length = idlen;
2231 strlcpy(desc->identifier, target, idlen);
2232
2233 retval = ctl_port_register(port);
2234 if (retval != 0) {
2235 free(port->port_devid, M_CFISCSI);
2236 free(port->target_devid, M_CFISCSI);
2237 cfiscsi_target_release(ct);
2238 req->status = CTL_LUN_ERROR;
2239 snprintf(req->error_str, sizeof(req->error_str),
2240 "ctl_port_register() failed with error %d", retval);
2241 return;
2242 }
2243done:
2244 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE;
2245 req->status = CTL_LUN_OK;
2246 req->result_nvl = nvlist_create(0);
2247 nvlist_add_number(req->result_nvl, "port_id", port->targ_port);
2248}
2249
2250static void
2251cfiscsi_ioctl_port_remove(struct ctl_req *req)
2252{
2253 struct cfiscsi_target *ct;
2254 const char *target, *val;
2255 uint16_t tag;
2256
2257 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL);
2258 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag",
2259 NULL);
2260
2261 if (target == NULL || val == NULL) {
2262 req->status = CTL_LUN_ERROR;
2263 snprintf(req->error_str, sizeof(req->error_str),
2264 "Missing required argument");
2265 return;
2266 }
2267
2268 tag = strtoul(val, NULL, 0);
2269 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag);
2270 if (ct == NULL) {
2271 req->status = CTL_LUN_ERROR;
2272 snprintf(req->error_str, sizeof(req->error_str),
2273 "can't find target \"%s\"", target);
2274 return;
2275 }
2276
2277 ct->ct_state = CFISCSI_TARGET_STATE_DYING;
2278 ctl_port_offline(&ct->ct_port);
2279 cfiscsi_target_release(ct);
2280 cfiscsi_target_release(ct);
2281 req->status = CTL_LUN_OK;
2282}
2283
2284static int
2285cfiscsi_ioctl(struct cdev *dev,
2286 u_long cmd, caddr_t addr, int flag, struct thread *td)
2287{
2288 struct ctl_iscsi *ci;
2289 struct ctl_req *req;
2290
2291 if (cmd == CTL_PORT_REQ) {
2292 req = (struct ctl_req *)addr;
2293 switch (req->reqtype) {
2294 case CTL_REQ_CREATE:
2295 cfiscsi_ioctl_port_create(req);
2296 break;
2297 case CTL_REQ_REMOVE:
2298 cfiscsi_ioctl_port_remove(req);
2299 break;
2300 default:
2301 req->status = CTL_LUN_ERROR;
2302 snprintf(req->error_str, sizeof(req->error_str),
2303 "Unsupported request type %d", req->reqtype);
2304 }
2305 return (0);
2306 }
2307
2308 if (cmd != CTL_ISCSI)
2309 return (ENOTTY);
2310
2311 ci = (struct ctl_iscsi *)addr;
2312 switch (ci->type) {
2313 case CTL_ISCSI_HANDOFF:
2314 cfiscsi_ioctl_handoff(ci);
2315 break;
2316 case CTL_ISCSI_LIST:
2317 cfiscsi_ioctl_list(ci);
2318 break;
2319 case CTL_ISCSI_LOGOUT:
2320 cfiscsi_ioctl_logout(ci);
2321 break;
2322 case CTL_ISCSI_TERMINATE:
2323 cfiscsi_ioctl_terminate(ci);
2324 break;
2325 case CTL_ISCSI_LIMITS:
2326 cfiscsi_ioctl_limits(ci);
2327 break;
2328#ifdef ICL_KERNEL_PROXY
2329 case CTL_ISCSI_LISTEN:
2330 cfiscsi_ioctl_listen(ci);
2331 break;
2332 case CTL_ISCSI_ACCEPT:
2333 cfiscsi_ioctl_accept(ci);
2334 break;
2335 case CTL_ISCSI_SEND:
2336 cfiscsi_ioctl_send(ci);
2337 break;
2338 case CTL_ISCSI_RECEIVE:
2339 cfiscsi_ioctl_receive(ci);
2340 break;
2341#else
2342 case CTL_ISCSI_LISTEN:
2343 case CTL_ISCSI_ACCEPT:
2344 case CTL_ISCSI_SEND:
2345 case CTL_ISCSI_RECEIVE:
2346 ci->status = CTL_ISCSI_ERROR;
2347 snprintf(ci->error_str, sizeof(ci->error_str),
2348 "%s: CTL compiled without ICL_KERNEL_PROXY",
2349 __func__);
2350 break;
2351#endif /* !ICL_KERNEL_PROXY */
2352 default:
2353 ci->status = CTL_ISCSI_ERROR;
2354 snprintf(ci->error_str, sizeof(ci->error_str),
2355 "%s: invalid iSCSI request type %d", __func__, ci->type);
2356 break;
2357 }
2358
2359 return (0);
2360}
2361
2362static void
2363cfiscsi_target_hold(struct cfiscsi_target *ct)
2364{
2365
2366 refcount_acquire(&ct->ct_refcount);
2367}
2368
2369static void
2370cfiscsi_target_release(struct cfiscsi_target *ct)
2371{
2372 struct cfiscsi_softc *softc;
2373
2374 softc = ct->ct_softc;
2375 mtx_lock(&softc->lock);
2376 if (refcount_release(&ct->ct_refcount)) {
2377 TAILQ_REMOVE(&softc->targets, ct, ct_next);
2378 mtx_unlock(&softc->lock);
2379 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) {
2380 ct->ct_state = CFISCSI_TARGET_STATE_INVALID;
2381 if (ctl_port_deregister(&ct->ct_port) != 0)
2382 printf("%s: ctl_port_deregister() failed\n",
2383 __func__);
2384 }
2385 free(ct, M_CFISCSI);
2386
2387 return;
2388 }
2389 mtx_unlock(&softc->lock);
2390}
2391
2392static struct cfiscsi_target *
2393cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag)
2394{
2395 struct cfiscsi_target *ct;
2396
2397 mtx_lock(&softc->lock);
2398 TAILQ_FOREACH(ct, &softc->targets, ct_next) {
2399 if (ct->ct_tag != tag ||
2400 strcmp(name, ct->ct_name) != 0 ||
2401 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE)
2402 continue;
2403 cfiscsi_target_hold(ct);
2404 mtx_unlock(&softc->lock);
2405 return (ct);
2406 }
2407 mtx_unlock(&softc->lock);
2408
2409 return (NULL);
2410}
2411
2412static struct cfiscsi_target *
2413cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name,
2414 const char *alias, uint16_t tag)
2415{
2416 struct cfiscsi_target *ct, *newct;
2417
2418 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN)
2419 return (NULL);
2420
2421 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO);
2422
2423 mtx_lock(&softc->lock);
2424 TAILQ_FOREACH(ct, &softc->targets, ct_next) {
2425 if (ct->ct_tag != tag ||
2426 strcmp(name, ct->ct_name) != 0 ||
2427 ct->ct_state == CFISCSI_TARGET_STATE_INVALID)
2428 continue;
2429 cfiscsi_target_hold(ct);
2430 mtx_unlock(&softc->lock);
2431 free(newct, M_CFISCSI);
2432 return (ct);
2433 }
2434
2435 strlcpy(newct->ct_name, name, sizeof(newct->ct_name));
2436 if (alias != NULL)
2437 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias));
2438 newct->ct_tag = tag;
2439 refcount_init(&newct->ct_refcount, 1);
2440 newct->ct_softc = softc;
2441 if (TAILQ_EMPTY(&softc->targets))
2442 softc->last_target_id = 0;
2443 newct->ct_target_id = ++softc->last_target_id;
2444 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next);
2445 mtx_unlock(&softc->lock);
2446
2447 return (newct);
2448}
2449
2450static void
2451cfiscsi_pdu_done(struct icl_pdu *ip, int error)
2452{
2453
2454 if (error != 0)
2455 ; // XXX: Do something on error?
2456 ((ctl_ref)ip->ip_prv0)(ip->ip_prv1, -1);
2457}
2458
2459static void
2460cfiscsi_datamove_in(union ctl_io *io)
2461{
2462 struct cfiscsi_session *cs;
2463 struct icl_pdu *request, *response;
2464 const struct iscsi_bhs_scsi_command *bhssc;
2465 struct iscsi_bhs_data_in *bhsdi;
2466 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
2467 size_t len, expected_len, sg_len, buffer_offset;
2468 size_t max_send_data_segment_length;
2469 const char *sg_addr;
2470 icl_pdu_cb cb;
2471 int ctl_sg_count, error, i;
2472
2473 request = PRIV_REQUEST(io);
2474 cs = PDU_SESSION(request);
2475
2476 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs;
2477 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2478 ISCSI_BHS_OPCODE_SCSI_COMMAND,
2479 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND"));
2480
2481 if (io->scsiio.kern_sg_entries > 0) {
2482 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
2483 ctl_sg_count = io->scsiio.kern_sg_entries;
2484 } else {
2485 ctl_sglist = &ctl_sg_entry;
2486 ctl_sglist->addr = io->scsiio.kern_data_ptr;
2487 ctl_sglist->len = io->scsiio.kern_data_len;
2488 ctl_sg_count = 1;
2489 }
2490
2491 /*
2492 * This is the offset within the current SCSI command; for the first
2493 * call to cfiscsi_datamove() it will be 0, and for subsequent ones
2494 * it will be the sum of lengths of previous ones.
2495 */
2496 buffer_offset = io->scsiio.kern_rel_offset;
2497
2498 /*
2499 * This is the transfer length expected by the initiator. It can be
2500 * different from the amount of data from the SCSI point of view.
2501 */
2502 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length);
2503
2504 /*
2505 * If the transfer is outside of expected length -- we are done.
2506 */
2507 if (buffer_offset >= expected_len) {
2508#if 0
2509 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, "
2510 "already sent the expected len", buffer_offset);
2511#endif
2512 ctl_datamove_done(io, true);
2513 return;
2514 }
2515
2516 if (io->scsiio.kern_data_ref != NULL)
2517 cb = cfiscsi_pdu_done;
2518 else
2519 cb = NULL;
2520
2521 i = 0;
2522 sg_addr = NULL;
2523 sg_len = 0;
2524 response = NULL;
2525 bhsdi = NULL;
2526 if (cs->cs_conn->ic_hw_isomax != 0)
2527 max_send_data_segment_length = cs->cs_conn->ic_hw_isomax;
2528 else
2529 max_send_data_segment_length =
2530 cs->cs_conn->ic_max_send_data_segment_length;
2531 for (;;) {
2532 if (response == NULL) {
2533 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
2534 if (response == NULL) {
2535 CFISCSI_SESSION_WARN(cs, "failed to "
2536 "allocate memory; dropping connection");
2537 ctl_set_busy(&io->scsiio);
2538 ctl_datamove_done(io, true);
2539 cfiscsi_session_terminate(cs);
2540 return;
2541 }
2542 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs;
2543 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN;
2544 bhsdi->bhsdi_initiator_task_tag =
2545 bhssc->bhssc_initiator_task_tag;
2546 bhsdi->bhsdi_target_transfer_tag = 0xffffffff;
2547 bhsdi->bhsdi_datasn = htonl(PRIV_EXPDATASN(io));
2548 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset);
2549 }
2550
2551 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count"));
2552 if (sg_len == 0) {
2553 sg_addr = ctl_sglist[i].addr;
2554 sg_len = ctl_sglist[i].len;
2555 KASSERT(sg_len > 0, ("sg_len <= 0"));
2556 }
2557
2558 len = sg_len;
2559
2560 /*
2561 * Truncate to maximum data segment length.
2562 */
2563 KASSERT(response->ip_data_len < max_send_data_segment_length,
2564 ("ip_data_len %zd >= max_send_data_segment_length %zd",
2565 response->ip_data_len, max_send_data_segment_length));
2566 if (response->ip_data_len + len > max_send_data_segment_length) {
2567 len = max_send_data_segment_length - response->ip_data_len;
2568 KASSERT(len <= sg_len, ("len %zd > sg_len %zd",
2569 len, sg_len));
2570 }
2571
2572 /*
2573 * Truncate to expected data transfer length.
2574 */
2575 KASSERT(buffer_offset + response->ip_data_len < expected_len,
2576 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd",
2577 buffer_offset, response->ip_data_len, expected_len));
2578 if (buffer_offset + response->ip_data_len + len > expected_len) {
2579 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd "
2580 "to expected data transfer length %zd",
2581 buffer_offset + response->ip_data_len + len, expected_len);
2582 len = expected_len - (buffer_offset + response->ip_data_len);
2583 KASSERT(len <= sg_len, ("len %zd > sg_len %zd",
2584 len, sg_len));
2585 }
2586
2587 error = icl_pdu_append_data(response, sg_addr, len,
2588 M_NOWAIT | (cb ? ICL_NOCOPY : 0));
2589 if (error != 0) {
2590 CFISCSI_SESSION_WARN(cs, "failed to "
2591 "allocate memory; dropping connection");
2592 icl_pdu_free(response);
2593 ctl_set_busy(&io->scsiio);
2594 ctl_datamove_done(io, true);
2595 cfiscsi_session_terminate(cs);
2596 return;
2597 }
2598 sg_addr += len;
2599 sg_len -= len;
2600 io->scsiio.kern_data_resid -= len;
2601
2602 KASSERT(buffer_offset + response->ip_data_len <= expected_len,
2603 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd",
2604 buffer_offset, response->ip_data_len, expected_len));
2605 if (buffer_offset + response->ip_data_len == expected_len) {
2606 /*
2607 * Already have the amount of data the initiator wanted.
2608 */
2609 break;
2610 }
2611
2612 if (sg_len == 0) {
2613 /*
2614 * End of scatter-gather segment;
2615 * proceed to the next one...
2616 */
2617 if (i == ctl_sg_count - 1) {
2618 /*
2619 * ... unless this was the last one.
2620 */
2621 break;
2622 }
2623 i++;
2624 }
2625
2626 if (response->ip_data_len == max_send_data_segment_length) {
2627 /*
2628 * Can't stuff more data into the current PDU;
2629 * queue it. Note that's not enough to check
2630 * for kern_data_resid == 0 instead; there
2631 * may be several Data-In PDUs for the final
2632 * call to cfiscsi_datamove(), and we want
2633 * to set the F flag only on the last of them.
2634 */
2635 buffer_offset += response->ip_data_len;
2636 if (buffer_offset == io->scsiio.kern_total_len ||
2637 buffer_offset == expected_len) {
2638 buffer_offset -= response->ip_data_len;
2639 break;
2640 }
2641 PRIV_EXPDATASN(io) += howmany(response->ip_data_len,
2642 cs->cs_conn->ic_max_send_data_segment_length);
2643 if (cb != NULL) {
2644 response->ip_prv0 = io->scsiio.kern_data_ref;
2645 response->ip_prv1 = io->scsiio.kern_data_arg;
2646 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1);
2647 }
2648 cfiscsi_pdu_queue_cb(response, cb);
2649 response = NULL;
2650 bhsdi = NULL;
2651 }
2652 }
2653 if (response != NULL) {
2654 buffer_offset += response->ip_data_len;
2655 if (buffer_offset == io->scsiio.kern_total_len ||
2656 buffer_offset == expected_len) {
2657 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F;
2658 if (io->io_hdr.status == CTL_SUCCESS) {
2659 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S;
2660 if (io->scsiio.kern_total_len <
2661 ntohl(bhssc->bhssc_expected_data_transfer_length)) {
2662 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW;
2663 bhsdi->bhsdi_residual_count =
2664 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) -
2665 io->scsiio.kern_total_len);
2666 } else if (io->scsiio.kern_total_len >
2667 ntohl(bhssc->bhssc_expected_data_transfer_length)) {
2668 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW;
2669 bhsdi->bhsdi_residual_count =
2670 htonl(io->scsiio.kern_total_len -
2671 ntohl(bhssc->bhssc_expected_data_transfer_length));
2672 }
2673 bhsdi->bhsdi_status = io->scsiio.scsi_status;
2674 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT;
2675 }
2676 }
2677 KASSERT(response->ip_data_len > 0, ("sending empty Data-In"));
2678 PRIV_EXPDATASN(io) += howmany(response->ip_data_len,
2679 cs->cs_conn->ic_max_send_data_segment_length);
2680 if (cb != NULL) {
2681 response->ip_prv0 = io->scsiio.kern_data_ref;
2682 response->ip_prv1 = io->scsiio.kern_data_arg;
2683 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1);
2684 }
2685 cfiscsi_pdu_queue_cb(response, cb);
2686 }
2687
2688 ctl_datamove_done(io, true);
2689}
2690
2691static void
2692cfiscsi_datamove_out(union ctl_io *io)
2693{
2694 struct cfiscsi_session *cs;
2695 struct icl_pdu *request, *response;
2696 const struct iscsi_bhs_scsi_command *bhssc;
2697 struct iscsi_bhs_r2t *bhsr2t;
2698 struct cfiscsi_data_wait *cdw;
2699 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
2700 uint32_t expected_len, datamove_len, r2t_off, r2t_len;
2701 uint32_t target_transfer_tag;
2702 bool done;
2703
2704 request = PRIV_REQUEST(io);
2705 cs = PDU_SESSION(request);
2706
2707 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs;
2708 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2709 ISCSI_BHS_OPCODE_SCSI_COMMAND,
2710 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND"));
2711
2712 /*
2713 * Complete write underflow. Not a single byte to read. Return.
2714 */
2715 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length);
2716 if (io->scsiio.kern_rel_offset >= expected_len) {
2717 ctl_datamove_done(io, true);
2718 return;
2719 }
2720
2721 datamove_len = MIN(io->scsiio.kern_data_len,
2722 expected_len - io->scsiio.kern_rel_offset);
2723
2724 target_transfer_tag =
2725 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1);
2726 if (target_transfer_tag == 0xffffffff) {
2727 target_transfer_tag =
2728 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1);
2729 }
2730 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag,
2731 &target_transfer_tag);
2732 if (cdw == NULL) {
2733 CFISCSI_SESSION_WARN(cs, "failed to "
2734 "allocate memory; dropping connection");
2735 ctl_set_busy(&io->scsiio);
2736 ctl_datamove_done(io, true);
2737 cfiscsi_session_terminate(cs);
2738 return;
2739 }
2740#if 0
2741 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator "
2742 "task tag 0x%x, target transfer tag 0x%x",
2743 bhssc->bhssc_initiator_task_tag, target_transfer_tag);
2744#endif
2745
2746 cdw->cdw_ctl_io = io;
2747 cdw->cdw_target_transfer_tag = target_transfer_tag;
2748 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag;
2749 cdw->cdw_r2t_end = datamove_len;
2750 cdw->cdw_datasn = 0;
2751
2752 /* Set initial data pointer for the CDW respecting ext_data_filled. */
2753 if (io->scsiio.kern_sg_entries > 0) {
2754 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
2755 } else {
2756 ctl_sglist = &ctl_sg_entry;
2757 ctl_sglist->addr = io->scsiio.kern_data_ptr;
2758 ctl_sglist->len = datamove_len;
2759 }
2760 cdw->cdw_sg_index = 0;
2761 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr;
2762 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len;
2763 r2t_off = io->scsiio.ext_data_filled;
2764 while (r2t_off > 0) {
2765 if (r2t_off >= cdw->cdw_sg_len) {
2766 r2t_off -= cdw->cdw_sg_len;
2767 cdw->cdw_sg_index++;
2768 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr;
2769 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len;
2770 continue;
2771 }
2772 cdw->cdw_sg_addr += r2t_off;
2773 cdw->cdw_sg_len -= r2t_off;
2774 r2t_off = 0;
2775 }
2776
2777 if (cs->cs_immediate_data &&
2778 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled <
2779 icl_pdu_data_segment_length(request)) {
2780 done = cfiscsi_handle_data_segment(request, cdw);
2781 if (done) {
2782 cfiscsi_data_wait_free(cs, cdw);
2783 ctl_datamove_done(io, true);
2784 return;
2785 }
2786 }
2787
2788 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled;
2789 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled,
2790 cs->cs_max_burst_length);
2791 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len;
2792
2793 CFISCSI_SESSION_LOCK(cs);
2794 if (cs->cs_terminating_tasks) {
2795 CFISCSI_SESSION_UNLOCK(cs);
2796 KASSERT((io->io_hdr.flags & CTL_FLAG_ABORT) != 0,
2797 ("%s: I/O request %p on termating session %p not aborted",
2798 __func__, io, cs));
2799 CFISCSI_SESSION_WARN(cs, "aborting data_wait for aborted I/O");
2800 cfiscsi_data_wait_abort(cs, cdw, 44);
2801 return;
2802 }
2803 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next);
2804 CFISCSI_SESSION_UNLOCK(cs);
2805
2806 /*
2807 * XXX: We should limit the number of outstanding R2T PDUs
2808 * per task to MaxOutstandingR2T.
2809 */
2810 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
2811 if (response == NULL) {
2812 CFISCSI_SESSION_WARN(cs, "failed to "
2813 "allocate memory; dropping connection");
2814 ctl_set_busy(&io->scsiio);
2815 ctl_datamove_done(io, true);
2816 cfiscsi_session_terminate(cs);
2817 return;
2818 }
2819 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG;
2820 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs;
2821 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T;
2822 bhsr2t->bhsr2t_flags = 0x80;
2823 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun;
2824 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag;
2825 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag;
2826 /*
2827 * XXX: Here we assume that cfiscsi_datamove() won't ever
2828 * be running concurrently on several CPUs for a given
2829 * command.
2830 */
2831 bhsr2t->bhsr2t_r2tsn = htonl(PRIV_R2TSN(io)++);
2832 /*
2833 * This is the offset within the current SCSI command;
2834 * i.e. for the first call of datamove(), it will be 0,
2835 * and for subsequent ones it will be the sum of lengths
2836 * of previous ones.
2837 *
2838 * The ext_data_filled is to account for unsolicited
2839 * (immediate) data that might have already arrived.
2840 */
2841 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off);
2842 /*
2843 * This is the total length (sum of S/G lengths) this call
2844 * to cfiscsi_datamove() is supposed to handle, limited by
2845 * MaxBurstLength.
2846 */
2847 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len);
2848 cfiscsi_pdu_queue(response);
2849}
2850
2851static void
2852cfiscsi_datamove(union ctl_io *io)
2853{
2854
2855 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN)
2856 cfiscsi_datamove_in(io);
2857 else {
2858 /* We hadn't received anything during this datamove yet. */
2859 io->scsiio.ext_data_filled = 0;
2860 cfiscsi_datamove_out(io);
2861 }
2862}
2863
2864static void
2865cfiscsi_scsi_command_done(union ctl_io *io)
2866{
2867 struct icl_pdu *request, *response;
2868 struct iscsi_bhs_scsi_command *bhssc;
2869 struct iscsi_bhs_scsi_response *bhssr;
2870#ifdef DIAGNOSTIC
2871 struct cfiscsi_data_wait *cdw;
2872 struct cfiscsi_session *cs;
2873#endif
2874 uint16_t sense_length;
2875
2876 request = PRIV_REQUEST(io);
2877 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs;
2878 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2879 ISCSI_BHS_OPCODE_SCSI_COMMAND,
2880 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode));
2881
2882 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x",
2883 // bhssc->bhssc_initiator_task_tag);
2884
2885#ifdef DIAGNOSTIC
2886 cs = PDU_SESSION(request);
2887 CFISCSI_SESSION_LOCK(cs);
2888 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next)
2889 KASSERT(bhssc->bhssc_initiator_task_tag !=
2890 cdw->cdw_initiator_task_tag, ("dangling cdw"));
2891 CFISCSI_SESSION_UNLOCK(cs);
2892#endif
2893
2894 /*
2895 * Do not return status for aborted commands.
2896 * There are exceptions, but none supported by CTL yet.
2897 */
2898 if (((io->io_hdr.flags & CTL_FLAG_ABORT) &&
2899 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) ||
2900 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) {
2901 ctl_free_io(io);
2902 icl_pdu_free(request);
2903 return;
2904 }
2905
2906 response = cfiscsi_pdu_new_response(request, M_WAITOK);
2907 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs;
2908 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE;
2909 bhssr->bhssr_flags = 0x80;
2910 /*
2911 * XXX: We don't deal with bidirectional under/overflows;
2912 * does anything actually support those?
2913 */
2914 if (io->scsiio.kern_total_len <
2915 ntohl(bhssc->bhssc_expected_data_transfer_length)) {
2916 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW;
2917 bhssr->bhssr_residual_count =
2918 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) -
2919 io->scsiio.kern_total_len);
2920 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d",
2921 // ntohl(bhssr->bhssr_residual_count));
2922 } else if (io->scsiio.kern_total_len >
2923 ntohl(bhssc->bhssc_expected_data_transfer_length)) {
2924 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW;
2925 bhssr->bhssr_residual_count = htonl(io->scsiio.kern_total_len -
2926 ntohl(bhssc->bhssc_expected_data_transfer_length));
2927 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d",
2928 // ntohl(bhssr->bhssr_residual_count));
2929 }
2930 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED;
2931 bhssr->bhssr_status = io->scsiio.scsi_status;
2932 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag;
2933 bhssr->bhssr_expdatasn = htonl(PRIV_EXPDATASN(io));
2934
2935 if (io->scsiio.sense_len > 0) {
2936#if 0
2937 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data",
2938 io->scsiio.sense_len);
2939#endif
2940 sense_length = htons(io->scsiio.sense_len);
2941 icl_pdu_append_data(response,
2942 &sense_length, sizeof(sense_length), M_WAITOK);
2943 icl_pdu_append_data(response,
2944 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK);
2945 }
2946
2947 ctl_free_io(io);
2948 icl_pdu_free(request);
2949 cfiscsi_pdu_queue(response);
2950}
2951
2952static void
2953cfiscsi_task_management_done(union ctl_io *io)
2954{
2955 struct icl_pdu *request, *response;
2956 struct iscsi_bhs_task_management_request *bhstmr;
2957 struct iscsi_bhs_task_management_response *bhstmr2;
2958 struct cfiscsi_data_wait *cdw, *tmpcdw;
2959 struct cfiscsi_session *cs, *tcs;
2960 struct cfiscsi_softc *softc;
2961 int cold_reset = 0;
2962
2963 request = PRIV_REQUEST(io);
2964 cs = PDU_SESSION(request);
2965 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs;
2966 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2967 ISCSI_BHS_OPCODE_TASK_REQUEST,
2968 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode));
2969
2970#if 0
2971 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x",
2972 bhstmr->bhstmr_initiator_task_tag,
2973 bhstmr->bhstmr_referenced_task_tag);
2974#endif
2975
2976 if ((bhstmr->bhstmr_function & ~0x80) ==
2977 BHSTMR_FUNCTION_ABORT_TASK) {
2978 /*
2979 * Make sure we no longer wait for Data-Out for this command.
2980 */
2981 CFISCSI_SESSION_LOCK(cs);
2982 TAILQ_FOREACH_SAFE(cdw,
2983 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) {
2984 if (bhstmr->bhstmr_referenced_task_tag !=
2985 cdw->cdw_initiator_task_tag)
2986 continue;
2987
2988#if 0
2989 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task "
2990 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag);
2991#endif
2992 TAILQ_REMOVE(&cs->cs_waiting_for_data_out,
2993 cdw, cdw_next);
2994 cfiscsi_data_wait_abort(cs, cdw, 43);
2995 }
2996 CFISCSI_SESSION_UNLOCK(cs);
2997 }
2998 if ((bhstmr->bhstmr_function & ~0x80) ==
2999 BHSTMR_FUNCTION_TARGET_COLD_RESET &&
3000 io->io_hdr.status == CTL_SUCCESS)
3001 cold_reset = 1;
3002
3003 response = cfiscsi_pdu_new_response(request, M_WAITOK);
3004 bhstmr2 = (struct iscsi_bhs_task_management_response *)
3005 response->ip_bhs;
3006 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE;
3007 bhstmr2->bhstmr_flags = 0x80;
3008 switch (io->taskio.task_status) {
3009 case CTL_TASK_FUNCTION_COMPLETE:
3010 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE;
3011 break;
3012 case CTL_TASK_FUNCTION_SUCCEEDED:
3013 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED;
3014 break;
3015 case CTL_TASK_LUN_DOES_NOT_EXIST:
3016 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST;
3017 break;
3018 case CTL_TASK_FUNCTION_NOT_SUPPORTED:
3019 default:
3020 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED;
3021 break;
3022 }
3023 memcpy(bhstmr2->bhstmr_additional_reponse_information,
3024 io->taskio.task_resp, sizeof(io->taskio.task_resp));
3025 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag;
3026
3027 ctl_free_io(io);
3028 icl_pdu_free(request);
3029 cfiscsi_pdu_queue(response);
3030
3031 if (cold_reset) {
3032 softc = cs->cs_target->ct_softc;
3033 mtx_lock(&softc->lock);
3034 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) {
3035 if (tcs->cs_target == cs->cs_target)
3036 cfiscsi_session_terminate(tcs);
3037 }
3038 mtx_unlock(&softc->lock);
3039 }
3040}
3041
3042static void
3043cfiscsi_done(union ctl_io *io)
3044{
3045 struct icl_pdu *request;
3046 struct cfiscsi_session *cs;
3047
3048 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE),
3049 ("invalid CTL status %#x", io->io_hdr.status));
3050
3051 request = PRIV_REQUEST(io);
3052 cs = PDU_SESSION(request);
3053
3054 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) {
3055 case ISCSI_BHS_OPCODE_SCSI_COMMAND:
3056 cfiscsi_scsi_command_done(io);
3057 break;
3058 case ISCSI_BHS_OPCODE_TASK_REQUEST:
3059 cfiscsi_task_management_done(io);
3060 break;
3061 case ISCSI_BHS_OPCODE_INTERNAL:
3062 /*
3063 * Implicit task termination has just completed; nothing to do.
3064 */
3065 icl_pdu_free(request);
3066 cs->cs_tasks_aborted = true;
3067 refcount_release(&cs->cs_outstanding_ctl_pdus);
3068 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus));
3069 ctl_free_io(io);
3070 return;
3071 default:
3072 panic("cfiscsi_done called with wrong opcode 0x%x",
3073 request->ip_bhs->bhs_opcode);
3074 }
3075
3076 refcount_release(&cs->cs_outstanding_ctl_pdus);
3077}
FEATURE
FEATURE(scbus, "SCSI devices support")
ctl_decode_lun
uint32_t ctl_decode_lun(uint64_t encoded)
Definition: ctl.c:3749
ctl_free_io
void ctl_free_io(union ctl_io *io)
Definition: ctl.c:3991
ctl_remove_initiator
int ctl_remove_initiator(struct ctl_port *port, int iid)
Definition: ctl.c:2145
ctl_add_initiator
int ctl_add_initiator(struct ctl_port *port, int iid, uint64_t wwpn, char *name)
Definition: ctl.c:2174
ctl_datamove_done
void ctl_datamove_done(union ctl_io *io, bool samethr)
Definition: ctl.c:12530
ctl_run
int ctl_run(union ctl_io *io)
Definition: ctl.c:13301
ctl_zero_io
void ctl_zero_io(union ctl_io *io)
Definition: ctl.c:4003
ctl_alloc_io
union ctl_io * ctl_alloc_io(void *pool_ref)
Definition: ctl.c:3961
CTL_RETVAL_COMPLETE
#define CTL_RETVAL_COMPLETE
Definition: ctl.h:45
CTL_PORT_ISCSI
@ CTL_PORT_ISCSI
Definition: ctl.h:56
ctl_backend.h
ctl_debug.h
ctl_set_data_phase_error
void ctl_set_data_phase_error(struct ctl_scsiio *ctsio)
Definition: ctl_error.c:917
ctl_set_busy
void ctl_set_busy(struct ctl_scsiio *ctsio)
Definition: ctl_error.c:947
ctl_error.h
ctl_port_deregister
int ctl_port_deregister(struct ctl_port *port)
Definition: ctl_frontend.c:227
ctl_port_offline
void ctl_port_offline(struct ctl_port *port)
Definition: ctl_frontend.c:357
ctl_port_register
int ctl_port_register(struct ctl_port *port)
Definition: ctl_frontend.c:148
ctl_frontend.h
cfiscsi_pdu_handle_data_out
static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request)
Definition: ctl_frontend_iscsi.c:881
PRIV_REQUEST
#define PRIV_REQUEST(io)
Definition: ctl_frontend_iscsi.c:156
CFISCSI_SESSION_WARN
#define CFISCSI_SESSION_WARN(S, X,...)
Definition: ctl_frontend_iscsi.c:133
cfiscsi_session_unregister_initiator
static void cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs)
Definition: ctl_frontend_iscsi.c:1266
cfiscsi_pdu_handle_scsi_command
static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request)
Definition: ctl_frontend_iscsi.c:509
cfiscsi_pdu_handle_task_request
static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request)
Definition: ctl_frontend_iscsi.c:575
CFISCSI_SESSION_DEBUG
#define CFISCSI_SESSION_DEBUG(S, X,...)
Definition: ctl_frontend_iscsi.c:124
cfiscsi_softc
static struct cfiscsi_softc cfiscsi_softc
Definition: ctl_frontend_iscsi.c:192
cfiscsi_receive_callback
static void cfiscsi_receive_callback(struct icl_pdu *request)
Definition: ctl_frontend_iscsi.c:327
CTL_FRONTEND_DECLARE
CTL_FRONTEND_DECLARE(cfiscsi, cfiscsi_frontend)
cfiscsi_frontend
static struct ctl_frontend cfiscsi_frontend
Definition: ctl_frontend_iscsi.c:194
cfiscsi_ioctl_logout
static void cfiscsi_ioctl_logout(struct ctl_iscsi *ci)
Definition: ctl_frontend_iscsi.c:1792
cfiscsi_pdu_done
static void cfiscsi_pdu_done(struct icl_pdu *ip, int error)
Definition: ctl_frontend_iscsi.c:2451
cfiscsi_session_register_initiator
static int cfiscsi_session_register_initiator(struct cfiscsi_session *cs)
Definition: ctl_frontend_iscsi.c:1240
cfiscsi_maintenance_thread
static void cfiscsi_maintenance_thread(void *arg)
Definition: ctl_frontend_iscsi.c:1193
CFISCSI_SESSION_LOCK_ASSERT
#define CFISCSI_SESSION_LOCK_ASSERT(X)
Definition: ctl_frontend_iscsi.c:144
login_timeout
static int login_timeout
Definition: ctl_frontend_iscsi.c:101
cfiscsi_target_release
static void cfiscsi_target_release(struct cfiscsi_target *ct)
Definition: ctl_frontend_iscsi.c:2370
ISCSI_BHS_OPCODE_INTERNAL
#define ISCSI_BHS_OPCODE_INTERNAL
Definition: ctl_frontend_iscsi.c:88
cfiscsi_pdu_queue
static void cfiscsi_pdu_queue(struct icl_pdu *response)
Definition: ctl_frontend_iscsi.c:417
cfiscsi_target_find
static struct cfiscsi_target * cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag)
Definition: ctl_frontend_iscsi.c:2393
SYSCTL_NODE
SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD|CTLFLAG_MPSAFE, 0, "CAM Target Layer iSCSI Frontend")
PRIV_R2TSN
#define PRIV_R2TSN(io)
Definition: ctl_frontend_iscsi.c:158
cfiscsi_target_hold
static void cfiscsi_target_hold(struct cfiscsi_target *ct)
Definition: ctl_frontend_iscsi.c:2363
cfiscsi_pdu_queue_cb
static void cfiscsi_pdu_queue_cb(struct icl_pdu *response, icl_pdu_cb cb)
Definition: ctl_frontend_iscsi.c:430
maxtags
static int maxtags
Definition: ctl_frontend_iscsi.c:104
cfiscsi_ioctl_port_create
static void cfiscsi_ioctl_port_create(struct ctl_req *req)
Definition: ctl_frontend_iscsi.c:2147
CFISCSI_WARN
#define CFISCSI_WARN(X,...)
Definition: ctl_frontend_iscsi.c:116
cfiscsi_pdu_update_cmdsn
static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request)
Definition: ctl_frontend_iscsi.c:212
cfiscsi_target_find_or_create
static struct cfiscsi_target * cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, const char *alias, uint16_t tag)
Definition: ctl_frontend_iscsi.c:2413
cfiscsi_data_wait_zone
static uma_zone_t cfiscsi_data_wait_zone
Definition: ctl_frontend_iscsi.c:91
PRIV_EXPDATASN
#define PRIV_EXPDATASN(io)
Definition: ctl_frontend_iscsi.c:157
cfiscsi_datamove_in
static void cfiscsi_datamove_in(union ctl_io *io)
Definition: ctl_frontend_iscsi.c:2460
cfiscsi_data_wait_free
static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, struct cfiscsi_data_wait *cdw)
Definition: ctl_frontend_iscsi.c:1106
cfiscsi_done
static void cfiscsi_done(union ctl_io *io)
Definition: ctl_frontend_iscsi.c:3043
cfiscsi_datamove
static void cfiscsi_datamove(union ctl_io *io)
Definition: ctl_frontend_iscsi.c:2852
CFISCSI_DEBUG
#define CFISCSI_DEBUG(X,...)
Definition: ctl_frontend_iscsi.c:108
CFISCSI_SESSION_UNLOCK
#define CFISCSI_SESSION_UNLOCK(X)
Definition: ctl_frontend_iscsi.c:143
CFISCSI_SESSION_LOCK
#define CFISCSI_SESSION_LOCK(X)
Definition: ctl_frontend_iscsi.c:142
cfiscsi_ioctl_handoff
static void cfiscsi_ioctl_handoff(struct ctl_iscsi *ci)
Definition: ctl_frontend_iscsi.c:1521
cfiscsi_ioctl_list
static void cfiscsi_ioctl_list(struct ctl_iscsi *ci)
Definition: ctl_frontend_iscsi.c:1709
cfiscsi_ioctl_limits
static void cfiscsi_ioctl_limits(struct ctl_iscsi *ci)
Definition: ctl_frontend_iscsi.c:1891
__FBSDID
__FBSDID("$FreeBSD$")
cfiscsi_shutdown
static int cfiscsi_shutdown(void)
Definition: ctl_frontend_iscsi.c:1388
cfiscsi_pdu_handle_logout_request
static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request)
Definition: ctl_frontend_iscsi.c:948
cfiscsi_pdu_prepare
static int cfiscsi_pdu_prepare(struct icl_pdu *response)
Definition: ctl_frontend_iscsi.c:358
cfiscsi_ioctl_port_remove
static void cfiscsi_ioctl_port_remove(struct ctl_req *req)
Definition: ctl_frontend_iscsi.c:2251
PDU_SESSION
#define PDU_SESSION(X)
Definition: ctl_frontend_iscsi.c:147
cfiscsi_data_wait_new
static struct cfiscsi_data_wait * cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, uint32_t initiator_task_tag, uint32_t *target_transfer_tagp)
Definition: ctl_frontend_iscsi.c:1076
SYSCTL_INT
SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, &debug, 1, "Enable debug messages")
cfiscsi_session_terminate_tasks
static void cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs)
Definition: ctl_frontend_iscsi.c:1134
cfiscsi_datamove_out
static void cfiscsi_datamove_out(union ctl_io *io)
Definition: ctl_frontend_iscsi.c:2692
CONN_SESSION
#define CONN_SESSION(X)
Definition: ctl_frontend_iscsi.c:146
MALLOC_DEFINE
static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend")
cfiscsi_pdu_handle
static void cfiscsi_pdu_handle(struct icl_pdu *request)
Definition: ctl_frontend_iscsi.c:280
debug
static int debug
Definition: ctl_frontend_iscsi.c:95
cfiscsi_scsi_command_done
static void cfiscsi_scsi_command_done(union ctl_io *io)
Definition: ctl_frontend_iscsi.c:2865
cfiscsi_offline
static void cfiscsi_offline(void *arg)
Definition: ctl_frontend_iscsi.c:1463
cfiscsi_session_terminate
static void cfiscsi_session_terminate(struct cfiscsi_session *cs)
Definition: ctl_frontend_iscsi.c:1229
cfiscsi_pdu_handle_nop_out
static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request)
Definition: ctl_frontend_iscsi.c:441
ping_timeout
static int ping_timeout
Definition: ctl_frontend_iscsi.c:98
cfiscsi_online
static void cfiscsi_online(void *arg)
Definition: ctl_frontend_iscsi.c:1435
cfiscsi_task_management_done
static void cfiscsi_task_management_done(union ctl_io *io)
Definition: ctl_frontend_iscsi.c:2953
cfiscsi_data_wait_abort
static void cfiscsi_data_wait_abort(struct cfiscsi_session *cs, struct cfiscsi_data_wait *cdw, int status)
Definition: ctl_frontend_iscsi.c:1115
cfiscsi_pdu_new_response
static struct icl_pdu * cfiscsi_pdu_new_response(struct icl_pdu *request, int flags)
Definition: ctl_frontend_iscsi.c:205
cfiscsi_session_delete
static void cfiscsi_session_delete(struct cfiscsi_session *cs)
Definition: ctl_frontend_iscsi.c:1340
cfiscsi_ioctl
static int cfiscsi_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
Definition: ctl_frontend_iscsi.c:2285
cfiscsi_info
static int cfiscsi_info(void *arg, struct sbuf *sb)
Definition: ctl_frontend_iscsi.c:1510
cfiscsi_callout
static void cfiscsi_callout(void *context)
Definition: ctl_frontend_iscsi.c:1005
cfiscsi_handle_data_segment
static bool cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw)
Definition: ctl_frontend_iscsi.c:697
cfiscsi_ioctl_terminate
static void cfiscsi_ioctl_terminate(struct ctl_iscsi *ci)
Definition: ctl_frontend_iscsi.c:1841
cfiscsi_init
static int cfiscsi_init(void)
Definition: ctl_frontend_iscsi.c:1365
MODULE_DEPEND
MODULE_DEPEND(cfiscsi, icl, 1, 1, 1)
cfiscsi_error_callback
static void cfiscsi_error_callback(struct icl_conn *ic)
Definition: ctl_frontend_iscsi.c:347
cfiscsi_session_new
static struct cfiscsi_session * cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload)
Definition: ctl_frontend_iscsi.c:1282
ctl_frontend_iscsi.h
CFISCSI_TARGET_STATE_ACTIVE
#define CFISCSI_TARGET_STATE_ACTIVE
Definition: ctl_frontend_iscsi.h:37
CFISCSI_TARGET_STATE_DYING
#define CFISCSI_TARGET_STATE_DYING
Definition: ctl_frontend_iscsi.h:38
CFISCSI_TARGET_STATE_INVALID
#define CFISCSI_TARGET_STATE_INVALID
Definition: ctl_frontend_iscsi.h:36
ctl_ha.h
ctl_io.h
CTL_IO_SCSI
@ CTL_IO_SCSI
Definition: ctl_io.h:191
CTL_IO_TASK
@ CTL_IO_TASK
Definition: ctl_io.h:192
CTL_TAG_HEAD_OF_QUEUE
@ CTL_TAG_HEAD_OF_QUEUE
Definition: ctl_io.h:257
CTL_TAG_UNTAGGED
@ CTL_TAG_UNTAGGED
Definition: ctl_io.h:254
CTL_TAG_SIMPLE
@ CTL_TAG_SIMPLE
Definition: ctl_io.h:255
CTL_TAG_ORDERED
@ CTL_TAG_ORDERED
Definition: ctl_io.h:256
CTL_TAG_ACA
@ CTL_TAG_ACA
Definition: ctl_io.h:258
CTL_TASK_LUN_RESET
@ CTL_TASK_LUN_RESET
Definition: ctl_io.h:348
CTL_TASK_QUERY_ASYNC_EVENT
@ CTL_TASK_QUERY_ASYNC_EVENT
Definition: ctl_io.h:355
CTL_TASK_QUERY_TASK_SET
@ CTL_TASK_QUERY_TASK_SET
Definition: ctl_io.h:354
CTL_TASK_ABORT_TASK
@ CTL_TASK_ABORT_TASK
Definition: ctl_io.h:343
CTL_TASK_CLEAR_TASK_SET
@ CTL_TASK_CLEAR_TASK_SET
Definition: ctl_io.h:346
CTL_TASK_TARGET_RESET
@ CTL_TASK_TARGET_RESET
Definition: ctl_io.h:349
CTL_TASK_ABORT_TASK_SET
@ CTL_TASK_ABORT_TASK_SET
Definition: ctl_io.h:344
CTL_TASK_QUERY_TASK
@ CTL_TASK_QUERY_TASK
Definition: ctl_io.h:353
CTL_TASK_I_T_NEXUS_RESET
@ CTL_TASK_I_T_NEXUS_RESET
Definition: ctl_io.h:347
ctl_ref
void(* ctl_ref)(void *arg, int diff)
Definition: ctl_io.h:263
CTL_SUCCESS
@ CTL_SUCCESS
Definition: ctl_io.h:70
CTL_STATUS_NONE
@ CTL_STATUS_NONE
Definition: ctl_io.h:69
CTL_STATUS_MASK
@ CTL_STATUS_MASK
Definition: ctl_io.h:76
CTL_FLAG_DMA_INPROG
@ CTL_FLAG_DMA_INPROG
Definition: ctl_io.h:96
CTL_FLAG_ABORT
@ CTL_FLAG_ABORT
Definition: ctl_io.h:95
CTL_FLAG_DATA_MASK
@ CTL_FLAG_DATA_MASK
Definition: ctl_io.h:90
CTL_FLAG_STATUS_SENT
@ CTL_FLAG_STATUS_SENT
Definition: ctl_io.h:115
CTL_FLAG_DATA_IN
@ CTL_FLAG_DATA_IN
Definition: ctl_io.h:87
CTL_FLAG_ABORT_STATUS
@ CTL_FLAG_ABORT_STATUS
Definition: ctl_io.h:94
CTL_TASK_LUN_DOES_NOT_EXIST
@ CTL_TASK_LUN_DOES_NOT_EXIST
Definition: ctl_io.h:362
CTL_TASK_FUNCTION_SUCCEEDED
@ CTL_TASK_FUNCTION_SUCCEEDED
Definition: ctl_io.h:360
CTL_TASK_FUNCTION_NOT_SUPPORTED
@ CTL_TASK_FUNCTION_NOT_SUPPORTED
Definition: ctl_io.h:363
CTL_TASK_FUNCTION_COMPLETE
@ CTL_TASK_FUNCTION_COMPLETE
Definition: ctl_io.h:359
ctl_ioctl.h
CTL_ISCSI_DIGEST_CRC32C
@ CTL_ISCSI_DIGEST_CRC32C
Definition: ctl_ioctl.h:605
CTL_ISCSI_LIMITS
@ CTL_ISCSI_LIMITS
Definition: ctl_ioctl.h:590
CTL_ISCSI_SEND
@ CTL_ISCSI_SEND
Definition: ctl_ioctl.h:598
CTL_ISCSI_HANDOFF
@ CTL_ISCSI_HANDOFF
Definition: ctl_ioctl.h:586
CTL_ISCSI_ACCEPT
@ CTL_ISCSI_ACCEPT
Definition: ctl_ioctl.h:597
CTL_ISCSI_RECEIVE
@ CTL_ISCSI_RECEIVE
Definition: ctl_ioctl.h:599
CTL_ISCSI_LIST
@ CTL_ISCSI_LIST
Definition: ctl_ioctl.h:587
CTL_ISCSI_LOGOUT
@ CTL_ISCSI_LOGOUT
Definition: ctl_ioctl.h:588
CTL_ISCSI_LISTEN
@ CTL_ISCSI_LISTEN
Definition: ctl_ioctl.h:596
CTL_ISCSI_TERMINATE
@ CTL_ISCSI_TERMINATE
Definition: ctl_ioctl.h:589
CTL_ISCSI
#define CTL_ISCSI
Definition: ctl_ioctl.h:771
CTL_ISCSI_NAME_LEN
#define CTL_ISCSI_NAME_LEN
Definition: ctl_ioctl.h:608
CTL_REQ_REMOVE
@ CTL_REQ_REMOVE
Definition: ctl_ioctl.h:550
CTL_REQ_CREATE
@ CTL_REQ_CREATE
Definition: ctl_ioctl.h:549
CTL_PORT_REQ
#define CTL_PORT_REQ
Definition: ctl_ioctl.h:772
CTL_LUN_ERROR
@ CTL_LUN_ERROR
Definition: ctl_ioctl.h:280
CTL_LUN_OK
@ CTL_LUN_OK
Definition: ctl_ioctl.h:279
CTL_ISCSI_ERROR
@ CTL_ISCSI_ERROR
Definition: ctl_ioctl.h:580
CTL_ISCSI_OK
@ CTL_ISCSI_OK
Definition: ctl_ioctl.h:579
CTL_ISCSI_SESSION_NOT_FOUND
@ CTL_ISCSI_SESSION_NOT_FOUND
Definition: ctl_ioctl.h:582
CTL_ISCSI_LIST_NEED_MORE_SPACE
@ CTL_ISCSI_LIST_NEED_MORE_SPACE
Definition: ctl_ioctl.h:581
ctl_private.h
scsi_all.h
SVPD_ID_ASSOC_TARGET
#define SVPD_ID_ASSOC_TARGET
Definition: scsi_all.h:2377
SVPD_ID_TYPE_SCSI_NAME
#define SVPD_ID_TYPE_SCSI_NAME
Definition: scsi_all.h:2387
SVPD_ID_CODESET_UTF8
#define SVPD_ID_CODESET_UTF8
Definition: scsi_all.h:2371
SVPD_ID_PIV
#define SVPD_ID_PIV
Definition: scsi_all.h:2374
SCSI_PROTO_ISCSI
#define SCSI_PROTO_ISCSI
Definition: scsi_all.h:862
SVPD_ID_ASSOC_PORT
#define SVPD_ID_ASSOC_PORT
Definition: scsi_all.h:2376
scsi_da.h
cfiscsi_data_wait
Definition: ctl_frontend_iscsi.h:53
cfiscsi_data_wait::cdw_icl_prv
void * cdw_icl_prv
Definition: ctl_frontend_iscsi.h:63
cfiscsi_data_wait::cdw_ctl_io
union ctl_io * cdw_ctl_io
Definition: ctl_frontend_iscsi.h:55
cfiscsi_data_wait::cdw_initiator_task_tag
uint32_t cdw_initiator_task_tag
Definition: ctl_frontend_iscsi.h:57
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ctl_devid::data
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Definition: ctl_private.h:370
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Definition: ctl_ioctl.h:618
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Definition: ctl_ioctl.h:620
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Definition: ctl_ioctl.h:615
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Definition: ctl_ioctl.h:619
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Definition: ctl_ioctl.h:625
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Definition: ctl_ioctl.h:617
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Definition: ctl_ioctl.h:614
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Definition: ctl_ioctl.h:630
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Definition: ctl_ioctl.h:633
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ctl_iscsi_limits_params::max_send_data_segment_length
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Definition: ctl_ioctl.h:676
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Definition: ctl_ioctl.h:671
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Definition: ctl_ioctl.h:677
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Definition: ctl_ioctl.h:678
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Definition: ctl_ioctl.h:675
ctl_iscsi_list_params
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Definition: ctl_ioctl.h:645
ctl_iscsi_list_params::conn_xml
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Definition: ctl_ioctl.h:644
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Definition: ctl_ioctl.h:643
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ctl_iscsi_logout_params::initiator_name
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Definition: ctl_ioctl.h:651
ctl_iscsi_logout_params::all
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Definition: ctl_ioctl.h:655
ctl_iscsi_logout_params::initiator_addr
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Definition: ctl_ioctl.h:653
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Definition: ctl_ioctl.h:650
ctl_iscsi_terminate_params
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Definition: ctl_ioctl.h:661
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Definition: ctl_ioctl.h:663
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Definition: ctl_ioctl.h:660
ctl_iscsi_terminate_params::all
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Definition: ctl_ioctl.h:665
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ctl_iscsi::type
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Definition: ctl_ioctl.h:747
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Definition: ctl_ioctl.h:749
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Definition: ctl_ioctl.h:750
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Definition: ctl_ioctl.h:748
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Definition: ctl_io.h:198
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Definition: ctl_io.h:197
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Definition: ctl_io.h:196
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Definition: ctl_frontend.h:220
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Definition: ctl_frontend.h:218
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Definition: ctl_frontend.h:217
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Definition: ctl_frontend.h:225
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Definition: ctl_frontend.h:221
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Definition: ctl_frontend.h:241
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Definition: ctl_ioctl.h:564
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Definition: ctl_ioctl.h:563
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Definition: ctl_ioctl.h:556
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Definition: ctl_io.h:326
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Definition: ctl_io.h:330
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Definition: ctl_io.h:275
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Definition: ctl_io.h:335
ctl_scsiio::cdb_len
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Definition: ctl_io.h:334
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Definition: ctl_io.h:339
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Definition: ctl_io.h:185
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Definition: ctl_io.h:379
scsi_vpd_device_id
Definition: scsi_all.h:2351
scsi_vpd_id_descriptor
Definition: scsi_all.h:2363
scsi_vpd_id_descriptor::id_type
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Definition: scsi_all.h:2373
scsi_vpd_id_descriptor::length
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Definition: scsi_all.h:2392
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Definition: scsi_all.h:2395
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ctl_io
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Definition: ctl_io.h:589
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Definition: ctl_io.h:587