1 /*-
2 * Copyright (c) 2003, 2004 Silicon Graphics International Corp.
3 * Copyright (c) 1997-2007 Kenneth D. Merry
4 * Copyright (c) 2012 The FreeBSD Foundation
5 * All rights reserved.
6 *
7 * Portions of this software were developed by Edward Tomasz Napierala
8 * under sponsorship from the FreeBSD Foundation.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions, and the following disclaimer,
15 * without modification.
16 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
17 * substantially similar to the "NO WARRANTY" disclaimer below
18 * ("Disclaimer") and any redistribution must be conditioned upon
19 * including a substantially similar Disclaimer requirement for further
20 * binary redistribution.
21 *
22 * NO WARRANTY
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGES.
34 *
35 */
36
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD: stable/10/usr.sbin/ctld/kernel.c 316253 2017-03-30 06:13:54Z ngie $");
39
40 #include <sys/param.h>
41 #include <sys/capsicum.h>
42 #include <sys/callout.h>
43 #include <sys/ioctl.h>
44 #include <sys/linker.h>
45 #include <sys/queue.h>
46 #include <sys/sbuf.h>
47 #include <sys/stat.h>
48 #include <assert.h>
49 #include <bsdxml.h>
50 #include <ctype.h>
51 #include <errno.h>
52 #include <fcntl.h>
53 #include <stdint.h>
54 #include <stdio.h>
55 #include <stdlib.h>
56 #include <string.h>
57 #include <strings.h>
58 #include <cam/scsi/scsi_all.h>
59 #include <cam/scsi/scsi_message.h>
60 #include <cam/ctl/ctl.h>
61 #include <cam/ctl/ctl_io.h>
62 #include <cam/ctl/ctl_backend.h>
63 #include <cam/ctl/ctl_ioctl.h>
64 #include <cam/ctl/ctl_util.h>
65 #include <cam/ctl/ctl_scsi_all.h>
66
67 #include "ctld.h"
68
69 #ifdef ICL_KERNEL_PROXY
70 #include <netdb.h>
71 #endif
72
73 extern bool proxy_mode;
74
75 static int ctl_fd = 0;
76
77 void
kernel_init(void)78 kernel_init(void)
79 {
80 int retval, saved_errno;
81
82 ctl_fd = open(CTL_DEFAULT_DEV, O_RDWR);
83 if (ctl_fd < 0 && errno == ENOENT) {
84 saved_errno = errno;
85 retval = kldload("ctl");
86 if (retval != -1)
87 ctl_fd = open(CTL_DEFAULT_DEV, O_RDWR);
88 else
89 errno = saved_errno;
90 }
91 if (ctl_fd < 0)
92 log_err(1, "failed to open %s", CTL_DEFAULT_DEV);
93 }
94
95 /*
96 * Name/value pair used for per-LUN attributes.
97 */
98 struct cctl_lun_nv {
99 char *name;
100 char *value;
101 STAILQ_ENTRY(cctl_lun_nv) links;
102 };
103
104 /*
105 * Backend LUN information.
106 */
107 struct cctl_lun {
108 uint64_t lun_id;
109 char *backend_type;
110 uint8_t device_type;
111 uint64_t size_blocks;
112 uint32_t blocksize;
113 char *serial_number;
114 char *device_id;
115 char *ctld_name;
116 STAILQ_HEAD(,cctl_lun_nv) attr_list;
117 STAILQ_ENTRY(cctl_lun) links;
118 };
119
120 struct cctl_port {
121 uint32_t port_id;
122 char *port_frontend;
123 char *port_name;
124 int pp;
125 int vp;
126 int cfiscsi_state;
127 char *cfiscsi_target;
128 uint16_t cfiscsi_portal_group_tag;
129 char *ctld_portal_group_name;
130 STAILQ_HEAD(,cctl_lun_nv) attr_list;
131 STAILQ_ENTRY(cctl_port) links;
132 };
133
134 struct cctl_devlist_data {
135 int num_luns;
136 STAILQ_HEAD(,cctl_lun) lun_list;
137 struct cctl_lun *cur_lun;
138 int num_ports;
139 STAILQ_HEAD(,cctl_port) port_list;
140 struct cctl_port *cur_port;
141 int level;
142 struct sbuf *cur_sb[32];
143 };
144
145 static void
cctl_start_element(void * user_data,const char * name,const char ** attr)146 cctl_start_element(void *user_data, const char *name, const char **attr)
147 {
148 int i;
149 struct cctl_devlist_data *devlist;
150 struct cctl_lun *cur_lun;
151
152 devlist = (struct cctl_devlist_data *)user_data;
153 cur_lun = devlist->cur_lun;
154 devlist->level++;
155 if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) /
156 sizeof(devlist->cur_sb[0])))
157 log_errx(1, "%s: too many nesting levels, %zd max", __func__,
158 sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0]));
159
160 devlist->cur_sb[devlist->level] = sbuf_new_auto();
161 if (devlist->cur_sb[devlist->level] == NULL)
162 log_err(1, "%s: unable to allocate sbuf", __func__);
163
164 if (strcmp(name, "lun") == 0) {
165 if (cur_lun != NULL)
166 log_errx(1, "%s: improper lun element nesting",
167 __func__);
168
169 cur_lun = calloc(1, sizeof(*cur_lun));
170 if (cur_lun == NULL)
171 log_err(1, "%s: cannot allocate %zd bytes", __func__,
172 sizeof(*cur_lun));
173
174 devlist->num_luns++;
175 devlist->cur_lun = cur_lun;
176
177 STAILQ_INIT(&cur_lun->attr_list);
178 STAILQ_INSERT_TAIL(&devlist->lun_list, cur_lun, links);
179
180 for (i = 0; attr[i] != NULL; i += 2) {
181 if (strcmp(attr[i], "id") == 0) {
182 cur_lun->lun_id = strtoull(attr[i+1], NULL, 0);
183 } else {
184 log_errx(1, "%s: invalid LUN attribute %s = %s",
185 __func__, attr[i], attr[i+1]);
186 }
187 }
188 }
189 }
190
191 static void
cctl_end_element(void * user_data,const char * name)192 cctl_end_element(void *user_data, const char *name)
193 {
194 struct cctl_devlist_data *devlist;
195 struct cctl_lun *cur_lun;
196 char *str;
197
198 devlist = (struct cctl_devlist_data *)user_data;
199 cur_lun = devlist->cur_lun;
200
201 if ((cur_lun == NULL)
202 && (strcmp(name, "ctllunlist") != 0))
203 log_errx(1, "%s: cur_lun == NULL! (name = %s)", __func__, name);
204
205 if (devlist->cur_sb[devlist->level] == NULL)
206 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__,
207 devlist->level, name);
208
209 sbuf_finish(devlist->cur_sb[devlist->level]);
210 str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level]));
211
212 if (strlen(str) == 0) {
213 free(str);
214 str = NULL;
215 }
216
217 sbuf_delete(devlist->cur_sb[devlist->level]);
218 devlist->cur_sb[devlist->level] = NULL;
219 devlist->level--;
220
221 if (strcmp(name, "backend_type") == 0) {
222 cur_lun->backend_type = str;
223 str = NULL;
224 } else if (strcmp(name, "lun_type") == 0) {
225 cur_lun->device_type = strtoull(str, NULL, 0);
226 } else if (strcmp(name, "size") == 0) {
227 cur_lun->size_blocks = strtoull(str, NULL, 0);
228 } else if (strcmp(name, "blocksize") == 0) {
229 cur_lun->blocksize = strtoul(str, NULL, 0);
230 } else if (strcmp(name, "serial_number") == 0) {
231 cur_lun->serial_number = str;
232 str = NULL;
233 } else if (strcmp(name, "device_id") == 0) {
234 cur_lun->device_id = str;
235 str = NULL;
236 } else if (strcmp(name, "ctld_name") == 0) {
237 cur_lun->ctld_name = str;
238 str = NULL;
239 } else if (strcmp(name, "lun") == 0) {
240 devlist->cur_lun = NULL;
241 } else if (strcmp(name, "ctllunlist") == 0) {
242 /* Nothing. */
243 } else {
244 struct cctl_lun_nv *nv;
245
246 nv = calloc(1, sizeof(*nv));
247 if (nv == NULL)
248 log_err(1, "%s: can't allocate %zd bytes for nv pair",
249 __func__, sizeof(*nv));
250
251 nv->name = checked_strdup(name);
252
253 nv->value = str;
254 str = NULL;
255 STAILQ_INSERT_TAIL(&cur_lun->attr_list, nv, links);
256 }
257
258 free(str);
259 }
260
261 static void
cctl_start_pelement(void * user_data,const char * name,const char ** attr)262 cctl_start_pelement(void *user_data, const char *name, const char **attr)
263 {
264 int i;
265 struct cctl_devlist_data *devlist;
266 struct cctl_port *cur_port;
267
268 devlist = (struct cctl_devlist_data *)user_data;
269 cur_port = devlist->cur_port;
270 devlist->level++;
271 if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) /
272 sizeof(devlist->cur_sb[0])))
273 log_errx(1, "%s: too many nesting levels, %zd max", __func__,
274 sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0]));
275
276 devlist->cur_sb[devlist->level] = sbuf_new_auto();
277 if (devlist->cur_sb[devlist->level] == NULL)
278 log_err(1, "%s: unable to allocate sbuf", __func__);
279
280 if (strcmp(name, "targ_port") == 0) {
281 if (cur_port != NULL)
282 log_errx(1, "%s: improper port element nesting (%s)",
283 __func__, name);
284
285 cur_port = calloc(1, sizeof(*cur_port));
286 if (cur_port == NULL)
287 log_err(1, "%s: cannot allocate %zd bytes", __func__,
288 sizeof(*cur_port));
289
290 devlist->num_ports++;
291 devlist->cur_port = cur_port;
292
293 STAILQ_INIT(&cur_port->attr_list);
294 STAILQ_INSERT_TAIL(&devlist->port_list, cur_port, links);
295
296 for (i = 0; attr[i] != NULL; i += 2) {
297 if (strcmp(attr[i], "id") == 0) {
298 cur_port->port_id = strtoul(attr[i+1], NULL, 0);
299 } else {
300 log_errx(1, "%s: invalid LUN attribute %s = %s",
301 __func__, attr[i], attr[i+1]);
302 }
303 }
304 }
305 }
306
307 static void
cctl_end_pelement(void * user_data,const char * name)308 cctl_end_pelement(void *user_data, const char *name)
309 {
310 struct cctl_devlist_data *devlist;
311 struct cctl_port *cur_port;
312 char *str;
313
314 devlist = (struct cctl_devlist_data *)user_data;
315 cur_port = devlist->cur_port;
316
317 if ((cur_port == NULL)
318 && (strcmp(name, "ctlportlist") != 0))
319 log_errx(1, "%s: cur_port == NULL! (name = %s)", __func__, name);
320
321 if (devlist->cur_sb[devlist->level] == NULL)
322 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__,
323 devlist->level, name);
324
325 sbuf_finish(devlist->cur_sb[devlist->level]);
326 str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level]));
327
328 if (strlen(str) == 0) {
329 free(str);
330 str = NULL;
331 }
332
333 sbuf_delete(devlist->cur_sb[devlist->level]);
334 devlist->cur_sb[devlist->level] = NULL;
335 devlist->level--;
336
337 if (strcmp(name, "frontend_type") == 0) {
338 cur_port->port_frontend = str;
339 str = NULL;
340 } else if (strcmp(name, "port_name") == 0) {
341 cur_port->port_name = str;
342 str = NULL;
343 } else if (strcmp(name, "physical_port") == 0) {
344 cur_port->pp = strtoul(str, NULL, 0);
345 } else if (strcmp(name, "virtual_port") == 0) {
346 cur_port->vp = strtoul(str, NULL, 0);
347 } else if (strcmp(name, "cfiscsi_target") == 0) {
348 cur_port->cfiscsi_target = str;
349 str = NULL;
350 } else if (strcmp(name, "cfiscsi_state") == 0) {
351 cur_port->cfiscsi_state = strtoul(str, NULL, 0);
352 } else if (strcmp(name, "cfiscsi_portal_group_tag") == 0) {
353 cur_port->cfiscsi_portal_group_tag = strtoul(str, NULL, 0);
354 } else if (strcmp(name, "ctld_portal_group_name") == 0) {
355 cur_port->ctld_portal_group_name = str;
356 str = NULL;
357 } else if (strcmp(name, "targ_port") == 0) {
358 devlist->cur_port = NULL;
359 } else if (strcmp(name, "ctlportlist") == 0) {
360 /* Nothing. */
361 } else {
362 struct cctl_lun_nv *nv;
363
364 nv = calloc(1, sizeof(*nv));
365 if (nv == NULL)
366 log_err(1, "%s: can't allocate %zd bytes for nv pair",
367 __func__, sizeof(*nv));
368
369 nv->name = checked_strdup(name);
370
371 nv->value = str;
372 str = NULL;
373 STAILQ_INSERT_TAIL(&cur_port->attr_list, nv, links);
374 }
375
376 free(str);
377 }
378
379 static void
cctl_char_handler(void * user_data,const XML_Char * str,int len)380 cctl_char_handler(void *user_data, const XML_Char *str, int len)
381 {
382 struct cctl_devlist_data *devlist;
383
384 devlist = (struct cctl_devlist_data *)user_data;
385
386 sbuf_bcat(devlist->cur_sb[devlist->level], str, len);
387 }
388
389 struct conf *
conf_new_from_kernel(void)390 conf_new_from_kernel(void)
391 {
392 struct conf *conf = NULL;
393 struct target *targ;
394 struct portal_group *pg;
395 struct pport *pp;
396 struct port *cp;
397 struct lun *cl;
398 struct option *o;
399 struct ctl_lun_list list;
400 struct cctl_devlist_data devlist;
401 struct cctl_lun *lun;
402 struct cctl_port *port;
403 XML_Parser parser;
404 char *str, *name;
405 int len, retval;
406
407 bzero(&devlist, sizeof(devlist));
408 STAILQ_INIT(&devlist.lun_list);
409 STAILQ_INIT(&devlist.port_list);
410
411 log_debugx("obtaining previously configured CTL luns from the kernel");
412
413 str = NULL;
414 len = 4096;
415 retry:
416 str = realloc(str, len);
417 if (str == NULL)
418 log_err(1, "realloc");
419
420 bzero(&list, sizeof(list));
421 list.alloc_len = len;
422 list.status = CTL_LUN_LIST_NONE;
423 list.lun_xml = str;
424
425 if (ioctl(ctl_fd, CTL_LUN_LIST, &list) == -1) {
426 log_warn("error issuing CTL_LUN_LIST ioctl");
427 free(str);
428 return (NULL);
429 }
430
431 if (list.status == CTL_LUN_LIST_ERROR) {
432 log_warnx("error returned from CTL_LUN_LIST ioctl: %s",
433 list.error_str);
434 free(str);
435 return (NULL);
436 }
437
438 if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) {
439 len = len << 1;
440 goto retry;
441 }
442
443 parser = XML_ParserCreate(NULL);
444 if (parser == NULL) {
445 log_warnx("unable to create XML parser");
446 free(str);
447 return (NULL);
448 }
449
450 XML_SetUserData(parser, &devlist);
451 XML_SetElementHandler(parser, cctl_start_element, cctl_end_element);
452 XML_SetCharacterDataHandler(parser, cctl_char_handler);
453
454 retval = XML_Parse(parser, str, strlen(str), 1);
455 XML_ParserFree(parser);
456 free(str);
457 if (retval != 1) {
458 log_warnx("XML_Parse failed");
459 return (NULL);
460 }
461
462 str = NULL;
463 len = 4096;
464 retry_port:
465 str = realloc(str, len);
466 if (str == NULL)
467 log_err(1, "realloc");
468
469 bzero(&list, sizeof(list));
470 list.alloc_len = len;
471 list.status = CTL_LUN_LIST_NONE;
472 list.lun_xml = str;
473
474 if (ioctl(ctl_fd, CTL_PORT_LIST, &list) == -1) {
475 log_warn("error issuing CTL_PORT_LIST ioctl");
476 free(str);
477 return (NULL);
478 }
479
480 if (list.status == CTL_LUN_LIST_ERROR) {
481 log_warnx("error returned from CTL_PORT_LIST ioctl: %s",
482 list.error_str);
483 free(str);
484 return (NULL);
485 }
486
487 if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) {
488 len = len << 1;
489 goto retry_port;
490 }
491
492 parser = XML_ParserCreate(NULL);
493 if (parser == NULL) {
494 log_warnx("unable to create XML parser");
495 free(str);
496 return (NULL);
497 }
498
499 XML_SetUserData(parser, &devlist);
500 XML_SetElementHandler(parser, cctl_start_pelement, cctl_end_pelement);
501 XML_SetCharacterDataHandler(parser, cctl_char_handler);
502
503 retval = XML_Parse(parser, str, strlen(str), 1);
504 XML_ParserFree(parser);
505 free(str);
506 if (retval != 1) {
507 log_warnx("XML_Parse failed");
508 return (NULL);
509 }
510
511 conf = conf_new();
512
513 name = NULL;
514 STAILQ_FOREACH(port, &devlist.port_list, links) {
515 if (strcmp(port->port_frontend, "ha") == 0)
516 continue;
517 if (name)
518 free(name);
519 if (port->pp == 0 && port->vp == 0)
520 name = checked_strdup(port->port_name);
521 else if (port->vp == 0)
522 asprintf(&name, "%s/%d", port->port_name, port->pp);
523 else
524 asprintf(&name, "%s/%d/%d", port->port_name, port->pp,
525 port->vp);
526
527 if (port->cfiscsi_target == NULL) {
528 log_debugx("CTL port %u \"%s\" wasn't managed by ctld; ",
529 port->port_id, name);
530 pp = pport_find(conf, name);
531 if (pp == NULL) {
532 #if 0
533 log_debugx("found new kernel port %u \"%s\"",
534 port->port_id, name);
535 #endif
536 pp = pport_new(conf, name, port->port_id);
537 if (pp == NULL) {
538 log_warnx("pport_new failed");
539 continue;
540 }
541 }
542 continue;
543 }
544 if (port->cfiscsi_state != 1) {
545 log_debugx("CTL port %ju is not active (%d); ignoring",
546 (uintmax_t)port->port_id, port->cfiscsi_state);
547 continue;
548 }
549
550 targ = target_find(conf, port->cfiscsi_target);
551 if (targ == NULL) {
552 #if 0
553 log_debugx("found new kernel target %s for CTL port %ld",
554 port->cfiscsi_target, port->port_id);
555 #endif
556 targ = target_new(conf, port->cfiscsi_target);
557 if (targ == NULL) {
558 log_warnx("target_new failed");
559 continue;
560 }
561 }
562
563 if (port->ctld_portal_group_name == NULL)
564 continue;
565 pg = portal_group_find(conf, port->ctld_portal_group_name);
566 if (pg == NULL) {
567 #if 0
568 log_debugx("found new kernel portal group %s for CTL port %ld",
569 port->ctld_portal_group_name, port->port_id);
570 #endif
571 pg = portal_group_new(conf, port->ctld_portal_group_name);
572 if (pg == NULL) {
573 log_warnx("portal_group_new failed");
574 continue;
575 }
576 }
577 pg->pg_tag = port->cfiscsi_portal_group_tag;
578 cp = port_new(conf, targ, pg);
579 if (cp == NULL) {
580 log_warnx("port_new failed");
581 continue;
582 }
583 cp->p_ctl_port = port->port_id;
584 }
585 if (name)
586 free(name);
587
588 STAILQ_FOREACH(lun, &devlist.lun_list, links) {
589 struct cctl_lun_nv *nv;
590
591 if (lun->ctld_name == NULL) {
592 log_debugx("CTL lun %ju wasn't managed by ctld; "
593 "ignoring", (uintmax_t)lun->lun_id);
594 continue;
595 }
596
597 cl = lun_find(conf, lun->ctld_name);
598 if (cl != NULL) {
599 log_warnx("found CTL lun %ju \"%s\", "
600 "also backed by CTL lun %d; ignoring",
601 (uintmax_t)lun->lun_id, lun->ctld_name,
602 cl->l_ctl_lun);
603 continue;
604 }
605
606 log_debugx("found CTL lun %ju \"%s\"",
607 (uintmax_t)lun->lun_id, lun->ctld_name);
608
609 cl = lun_new(conf, lun->ctld_name);
610 if (cl == NULL) {
611 log_warnx("lun_new failed");
612 continue;
613 }
614 lun_set_backend(cl, lun->backend_type);
615 lun_set_device_type(cl, lun->device_type);
616 lun_set_blocksize(cl, lun->blocksize);
617 lun_set_device_id(cl, lun->device_id);
618 lun_set_serial(cl, lun->serial_number);
619 lun_set_size(cl, lun->size_blocks * cl->l_blocksize);
620 lun_set_ctl_lun(cl, lun->lun_id);
621
622 STAILQ_FOREACH(nv, &lun->attr_list, links) {
623 if (strcmp(nv->name, "file") == 0 ||
624 strcmp(nv->name, "dev") == 0) {
625 lun_set_path(cl, nv->value);
626 continue;
627 }
628 o = option_new(&cl->l_options, nv->name, nv->value);
629 if (o == NULL)
630 log_warnx("unable to add CTL lun option %s "
631 "for CTL lun %ju \"%s\"",
632 nv->name, (uintmax_t) lun->lun_id,
633 cl->l_name);
634 }
635 }
636
637 return (conf);
638 }
639
640 static void
str_arg(struct ctl_be_arg * arg,const char * name,const char * value)641 str_arg(struct ctl_be_arg *arg, const char *name, const char *value)
642 {
643
644 arg->namelen = strlen(name) + 1;
645 arg->name = __DECONST(char *, name);
646 arg->vallen = strlen(value) + 1;
647 arg->value = __DECONST(char *, value);
648 arg->flags = CTL_BEARG_ASCII | CTL_BEARG_RD;
649 }
650
651 int
kernel_lun_add(struct lun * lun)652 kernel_lun_add(struct lun *lun)
653 {
654 struct option *o;
655 struct ctl_lun_req req;
656 int error, i, num_options;
657
658 bzero(&req, sizeof(req));
659
660 strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
661 req.reqtype = CTL_LUNREQ_CREATE;
662
663 req.reqdata.create.blocksize_bytes = lun->l_blocksize;
664
665 if (lun->l_size != 0)
666 req.reqdata.create.lun_size_bytes = lun->l_size;
667
668 if (lun->l_ctl_lun >= 0) {
669 req.reqdata.create.req_lun_id = lun->l_ctl_lun;
670 req.reqdata.create.flags |= CTL_LUN_FLAG_ID_REQ;
671 }
672
673 req.reqdata.create.flags |= CTL_LUN_FLAG_DEV_TYPE;
674 req.reqdata.create.device_type = lun->l_device_type;
675
676 if (lun->l_serial != NULL) {
677 strncpy(req.reqdata.create.serial_num, lun->l_serial,
678 sizeof(req.reqdata.create.serial_num));
679 req.reqdata.create.flags |= CTL_LUN_FLAG_SERIAL_NUM;
680 }
681
682 if (lun->l_device_id != NULL) {
683 strncpy(req.reqdata.create.device_id, lun->l_device_id,
684 sizeof(req.reqdata.create.device_id));
685 req.reqdata.create.flags |= CTL_LUN_FLAG_DEVID;
686 }
687
688 if (lun->l_path != NULL) {
689 o = option_find(&lun->l_options, "file");
690 if (o != NULL) {
691 option_set(o, lun->l_path);
692 } else {
693 o = option_new(&lun->l_options, "file", lun->l_path);
694 assert(o != NULL);
695 }
696 }
697
698 o = option_find(&lun->l_options, "ctld_name");
699 if (o != NULL) {
700 option_set(o, lun->l_name);
701 } else {
702 o = option_new(&lun->l_options, "ctld_name", lun->l_name);
703 assert(o != NULL);
704 }
705
706 o = option_find(&lun->l_options, "scsiname");
707 if (o == NULL && lun->l_scsiname != NULL) {
708 o = option_new(&lun->l_options, "scsiname", lun->l_scsiname);
709 assert(o != NULL);
710 }
711
712 num_options = 0;
713 TAILQ_FOREACH(o, &lun->l_options, o_next)
714 num_options++;
715
716 req.num_be_args = num_options;
717 if (num_options > 0) {
718 req.be_args = malloc(num_options * sizeof(*req.be_args));
719 if (req.be_args == NULL) {
720 log_warn("error allocating %zd bytes",
721 num_options * sizeof(*req.be_args));
722 return (1);
723 }
724
725 i = 0;
726 TAILQ_FOREACH(o, &lun->l_options, o_next) {
727 str_arg(&req.be_args[i], o->o_name, o->o_value);
728 i++;
729 }
730 assert(i == num_options);
731 }
732
733 error = ioctl(ctl_fd, CTL_LUN_REQ, &req);
734 free(req.be_args);
735 if (error != 0) {
736 log_warn("error issuing CTL_LUN_REQ ioctl");
737 return (1);
738 }
739
740 switch (req.status) {
741 case CTL_LUN_ERROR:
742 log_warnx("LUN creation error: %s", req.error_str);
743 return (1);
744 case CTL_LUN_WARNING:
745 log_warnx("LUN creation warning: %s", req.error_str);
746 break;
747 case CTL_LUN_OK:
748 break;
749 default:
750 log_warnx("unknown LUN creation status: %d",
751 req.status);
752 return (1);
753 }
754
755 lun_set_ctl_lun(lun, req.reqdata.create.req_lun_id);
756 return (0);
757 }
758
759 int
kernel_lun_modify(struct lun * lun)760 kernel_lun_modify(struct lun *lun)
761 {
762 struct option *o;
763 struct ctl_lun_req req;
764 int error, i, num_options;
765
766 bzero(&req, sizeof(req));
767
768 strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
769 req.reqtype = CTL_LUNREQ_MODIFY;
770
771 req.reqdata.modify.lun_id = lun->l_ctl_lun;
772 req.reqdata.modify.lun_size_bytes = lun->l_size;
773
774 num_options = 0;
775 TAILQ_FOREACH(o, &lun->l_options, o_next)
776 num_options++;
777
778 req.num_be_args = num_options;
779 if (num_options > 0) {
780 req.be_args = malloc(num_options * sizeof(*req.be_args));
781 if (req.be_args == NULL) {
782 log_warn("error allocating %zd bytes",
783 num_options * sizeof(*req.be_args));
784 return (1);
785 }
786
787 i = 0;
788 TAILQ_FOREACH(o, &lun->l_options, o_next) {
789 str_arg(&req.be_args[i], o->o_name, o->o_value);
790 i++;
791 }
792 assert(i == num_options);
793 }
794
795 error = ioctl(ctl_fd, CTL_LUN_REQ, &req);
796 free(req.be_args);
797 if (error != 0) {
798 log_warn("error issuing CTL_LUN_REQ ioctl");
799 return (1);
800 }
801
802 switch (req.status) {
803 case CTL_LUN_ERROR:
804 log_warnx("LUN modification error: %s", req.error_str);
805 return (1);
806 case CTL_LUN_WARNING:
807 log_warnx("LUN modification warning: %s", req.error_str);
808 break;
809 case CTL_LUN_OK:
810 break;
811 default:
812 log_warnx("unknown LUN modification status: %d",
813 req.status);
814 return (1);
815 }
816
817 return (0);
818 }
819
820 int
kernel_lun_remove(struct lun * lun)821 kernel_lun_remove(struct lun *lun)
822 {
823 struct ctl_lun_req req;
824
825 bzero(&req, sizeof(req));
826
827 strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
828 req.reqtype = CTL_LUNREQ_RM;
829
830 req.reqdata.rm.lun_id = lun->l_ctl_lun;
831
832 if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) {
833 log_warn("error issuing CTL_LUN_REQ ioctl");
834 return (1);
835 }
836
837 switch (req.status) {
838 case CTL_LUN_ERROR:
839 log_warnx("LUN removal error: %s", req.error_str);
840 return (1);
841 case CTL_LUN_WARNING:
842 log_warnx("LUN removal warning: %s", req.error_str);
843 break;
844 case CTL_LUN_OK:
845 break;
846 default:
847 log_warnx("unknown LUN removal status: %d", req.status);
848 return (1);
849 }
850
851 return (0);
852 }
853
854 void
kernel_handoff(struct connection * conn)855 kernel_handoff(struct connection *conn)
856 {
857 struct ctl_iscsi req;
858
859 bzero(&req, sizeof(req));
860
861 req.type = CTL_ISCSI_HANDOFF;
862 strlcpy(req.data.handoff.initiator_name,
863 conn->conn_initiator_name, sizeof(req.data.handoff.initiator_name));
864 strlcpy(req.data.handoff.initiator_addr,
865 conn->conn_initiator_addr, sizeof(req.data.handoff.initiator_addr));
866 if (conn->conn_initiator_alias != NULL) {
867 strlcpy(req.data.handoff.initiator_alias,
868 conn->conn_initiator_alias, sizeof(req.data.handoff.initiator_alias));
869 }
870 memcpy(req.data.handoff.initiator_isid, conn->conn_initiator_isid,
871 sizeof(req.data.handoff.initiator_isid));
872 strlcpy(req.data.handoff.target_name,
873 conn->conn_target->t_name, sizeof(req.data.handoff.target_name));
874 #ifdef ICL_KERNEL_PROXY
875 if (proxy_mode)
876 req.data.handoff.connection_id = conn->conn_socket;
877 else
878 req.data.handoff.socket = conn->conn_socket;
879 #else
880 req.data.handoff.socket = conn->conn_socket;
881 #endif
882 req.data.handoff.portal_group_tag =
883 conn->conn_portal->p_portal_group->pg_tag;
884 if (conn->conn_header_digest == CONN_DIGEST_CRC32C)
885 req.data.handoff.header_digest = CTL_ISCSI_DIGEST_CRC32C;
886 if (conn->conn_data_digest == CONN_DIGEST_CRC32C)
887 req.data.handoff.data_digest = CTL_ISCSI_DIGEST_CRC32C;
888 req.data.handoff.cmdsn = conn->conn_cmdsn;
889 req.data.handoff.statsn = conn->conn_statsn;
890 req.data.handoff.max_recv_data_segment_length =
891 conn->conn_max_data_segment_length;
892 req.data.handoff.max_burst_length = conn->conn_max_burst_length;
893 req.data.handoff.immediate_data = conn->conn_immediate_data;
894
895 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
896 log_err(1, "error issuing CTL_ISCSI ioctl; "
897 "dropping connection");
898 }
899
900 if (req.status != CTL_ISCSI_OK) {
901 log_errx(1, "error returned from CTL iSCSI handoff request: "
902 "%s; dropping connection", req.error_str);
903 }
904 }
905
906 int
kernel_port_add(struct port * port)907 kernel_port_add(struct port *port)
908 {
909 struct option *o;
910 struct ctl_port_entry entry;
911 struct ctl_req req;
912 struct ctl_lun_map lm;
913 struct target *targ = port->p_target;
914 struct portal_group *pg = port->p_portal_group;
915 char tagstr[16];
916 int error, i, n;
917
918 /* Create iSCSI port. */
919 if (port->p_portal_group) {
920 bzero(&req, sizeof(req));
921 strlcpy(req.driver, "iscsi", sizeof(req.driver));
922 req.reqtype = CTL_REQ_CREATE;
923 req.num_args = 5;
924 TAILQ_FOREACH(o, &pg->pg_options, o_next)
925 req.num_args++;
926 req.args = malloc(req.num_args * sizeof(*req.args));
927 if (req.args == NULL)
928 log_err(1, "malloc");
929 n = 0;
930 req.args[n].namelen = sizeof("port_id");
931 req.args[n].name = __DECONST(char *, "port_id");
932 req.args[n].vallen = sizeof(port->p_ctl_port);
933 req.args[n].value = &port->p_ctl_port;
934 req.args[n++].flags = CTL_BEARG_WR;
935 str_arg(&req.args[n++], "cfiscsi_target", targ->t_name);
936 snprintf(tagstr, sizeof(tagstr), "%d", pg->pg_tag);
937 str_arg(&req.args[n++], "cfiscsi_portal_group_tag", tagstr);
938 if (targ->t_alias)
939 str_arg(&req.args[n++], "cfiscsi_target_alias", targ->t_alias);
940 str_arg(&req.args[n++], "ctld_portal_group_name", pg->pg_name);
941 TAILQ_FOREACH(o, &pg->pg_options, o_next)
942 str_arg(&req.args[n++], o->o_name, o->o_value);
943 req.num_args = n;
944 error = ioctl(ctl_fd, CTL_PORT_REQ, &req);
945 free(req.args);
946 if (error != 0) {
947 log_warn("error issuing CTL_PORT_REQ ioctl");
948 return (1);
949 }
950 if (req.status == CTL_LUN_ERROR) {
951 log_warnx("error returned from port creation request: %s",
952 req.error_str);
953 return (1);
954 }
955 if (req.status != CTL_LUN_OK) {
956 log_warnx("unknown port creation request status %d",
957 req.status);
958 return (1);
959 }
960 } else if (port->p_pport) {
961 port->p_ctl_port = port->p_pport->pp_ctl_port;
962
963 if (strncmp(targ->t_name, "naa.", 4) == 0 &&
964 strlen(targ->t_name) == 20) {
965 bzero(&entry, sizeof(entry));
966 entry.port_type = CTL_PORT_NONE;
967 entry.targ_port = port->p_ctl_port;
968 entry.flags |= CTL_PORT_WWNN_VALID;
969 entry.wwnn = strtoull(targ->t_name + 4, NULL, 16);
970 if (ioctl(ctl_fd, CTL_SET_PORT_WWNS, &entry) == -1)
971 log_warn("CTL_SET_PORT_WWNS ioctl failed");
972 }
973 }
974
975 /* Explicitly enable mapping to block any access except allowed. */
976 lm.port = port->p_ctl_port;
977 lm.plun = UINT32_MAX;
978 lm.lun = 0;
979 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm);
980 if (error != 0)
981 log_warn("CTL_LUN_MAP ioctl failed");
982
983 /* Map configured LUNs */
984 for (i = 0; i < MAX_LUNS; i++) {
985 if (targ->t_luns[i] == NULL)
986 continue;
987 lm.port = port->p_ctl_port;
988 lm.plun = i;
989 lm.lun = targ->t_luns[i]->l_ctl_lun;
990 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm);
991 if (error != 0)
992 log_warn("CTL_LUN_MAP ioctl failed");
993 }
994
995 /* Enable port */
996 bzero(&entry, sizeof(entry));
997 entry.targ_port = port->p_ctl_port;
998 error = ioctl(ctl_fd, CTL_ENABLE_PORT, &entry);
999 if (error != 0) {
1000 log_warn("CTL_ENABLE_PORT ioctl failed");
1001 return (-1);
1002 }
1003
1004 return (0);
1005 }
1006
1007 int
kernel_port_update(struct port * port,struct port * oport)1008 kernel_port_update(struct port *port, struct port *oport)
1009 {
1010 struct ctl_lun_map lm;
1011 struct target *targ = port->p_target;
1012 struct target *otarg = oport->p_target;
1013 int error, i;
1014 uint32_t olun;
1015
1016 /* Map configured LUNs and unmap others */
1017 for (i = 0; i < MAX_LUNS; i++) {
1018 lm.port = port->p_ctl_port;
1019 lm.plun = i;
1020 if (targ->t_luns[i] == NULL)
1021 lm.lun = UINT32_MAX;
1022 else
1023 lm.lun = targ->t_luns[i]->l_ctl_lun;
1024 if (otarg->t_luns[i] == NULL)
1025 olun = UINT32_MAX;
1026 else
1027 olun = otarg->t_luns[i]->l_ctl_lun;
1028 if (lm.lun == olun)
1029 continue;
1030 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm);
1031 if (error != 0)
1032 log_warn("CTL_LUN_MAP ioctl failed");
1033 }
1034 return (0);
1035 }
1036
1037 int
kernel_port_remove(struct port * port)1038 kernel_port_remove(struct port *port)
1039 {
1040 struct ctl_port_entry entry;
1041 struct ctl_lun_map lm;
1042 struct ctl_req req;
1043 char tagstr[16];
1044 struct target *targ = port->p_target;
1045 struct portal_group *pg = port->p_portal_group;
1046 int error;
1047
1048 /* Disable port */
1049 bzero(&entry, sizeof(entry));
1050 entry.targ_port = port->p_ctl_port;
1051 error = ioctl(ctl_fd, CTL_DISABLE_PORT, &entry);
1052 if (error != 0) {
1053 log_warn("CTL_DISABLE_PORT ioctl failed");
1054 return (-1);
1055 }
1056
1057 /* Remove iSCSI port. */
1058 if (port->p_portal_group) {
1059 bzero(&req, sizeof(req));
1060 strlcpy(req.driver, "iscsi", sizeof(req.driver));
1061 req.reqtype = CTL_REQ_REMOVE;
1062 req.num_args = 2;
1063 req.args = malloc(req.num_args * sizeof(*req.args));
1064 if (req.args == NULL)
1065 log_err(1, "malloc");
1066 str_arg(&req.args[0], "cfiscsi_target", targ->t_name);
1067 snprintf(tagstr, sizeof(tagstr), "%d", pg->pg_tag);
1068 str_arg(&req.args[1], "cfiscsi_portal_group_tag", tagstr);
1069 error = ioctl(ctl_fd, CTL_PORT_REQ, &req);
1070 free(req.args);
1071 if (error != 0) {
1072 log_warn("error issuing CTL_PORT_REQ ioctl");
1073 return (1);
1074 }
1075 if (req.status == CTL_LUN_ERROR) {
1076 log_warnx("error returned from port removal request: %s",
1077 req.error_str);
1078 return (1);
1079 }
1080 if (req.status != CTL_LUN_OK) {
1081 log_warnx("unknown port removal request status %d",
1082 req.status);
1083 return (1);
1084 }
1085 } else {
1086 /* Disable LUN mapping. */
1087 lm.port = port->p_ctl_port;
1088 lm.plun = UINT32_MAX;
1089 lm.lun = UINT32_MAX;
1090 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm);
1091 if (error != 0)
1092 log_warn("CTL_LUN_MAP ioctl failed");
1093 }
1094 return (0);
1095 }
1096
1097 #ifdef ICL_KERNEL_PROXY
1098 void
kernel_listen(struct addrinfo * ai,bool iser,int portal_id)1099 kernel_listen(struct addrinfo *ai, bool iser, int portal_id)
1100 {
1101 struct ctl_iscsi req;
1102
1103 bzero(&req, sizeof(req));
1104
1105 req.type = CTL_ISCSI_LISTEN;
1106 req.data.listen.iser = iser;
1107 req.data.listen.domain = ai->ai_family;
1108 req.data.listen.socktype = ai->ai_socktype;
1109 req.data.listen.protocol = ai->ai_protocol;
1110 req.data.listen.addr = ai->ai_addr;
1111 req.data.listen.addrlen = ai->ai_addrlen;
1112 req.data.listen.portal_id = portal_id;
1113
1114 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1)
1115 log_err(1, "error issuing CTL_ISCSI ioctl");
1116
1117 if (req.status != CTL_ISCSI_OK) {
1118 log_errx(1, "error returned from CTL iSCSI listen: %s",
1119 req.error_str);
1120 }
1121 }
1122
1123 void
kernel_accept(int * connection_id,int * portal_id,struct sockaddr * client_sa,socklen_t * client_salen)1124 kernel_accept(int *connection_id, int *portal_id,
1125 struct sockaddr *client_sa, socklen_t *client_salen)
1126 {
1127 struct ctl_iscsi req;
1128 struct sockaddr_storage ss;
1129
1130 bzero(&req, sizeof(req));
1131
1132 req.type = CTL_ISCSI_ACCEPT;
1133 req.data.accept.initiator_addr = (struct sockaddr *)&ss;
1134
1135 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1)
1136 log_err(1, "error issuing CTL_ISCSI ioctl");
1137
1138 if (req.status != CTL_ISCSI_OK) {
1139 log_errx(1, "error returned from CTL iSCSI accept: %s",
1140 req.error_str);
1141 }
1142
1143 *connection_id = req.data.accept.connection_id;
1144 *portal_id = req.data.accept.portal_id;
1145 *client_salen = req.data.accept.initiator_addrlen;
1146 memcpy(client_sa, &ss, *client_salen);
1147 }
1148
1149 void
kernel_send(struct pdu * pdu)1150 kernel_send(struct pdu *pdu)
1151 {
1152 struct ctl_iscsi req;
1153
1154 bzero(&req, sizeof(req));
1155
1156 req.type = CTL_ISCSI_SEND;
1157 req.data.send.connection_id = pdu->pdu_connection->conn_socket;
1158 req.data.send.bhs = pdu->pdu_bhs;
1159 req.data.send.data_segment_len = pdu->pdu_data_len;
1160 req.data.send.data_segment = pdu->pdu_data;
1161
1162 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
1163 log_err(1, "error issuing CTL_ISCSI ioctl; "
1164 "dropping connection");
1165 }
1166
1167 if (req.status != CTL_ISCSI_OK) {
1168 log_errx(1, "error returned from CTL iSCSI send: "
1169 "%s; dropping connection", req.error_str);
1170 }
1171 }
1172
1173 void
kernel_receive(struct pdu * pdu)1174 kernel_receive(struct pdu *pdu)
1175 {
1176 struct ctl_iscsi req;
1177
1178 pdu->pdu_data = malloc(MAX_DATA_SEGMENT_LENGTH);
1179 if (pdu->pdu_data == NULL)
1180 log_err(1, "malloc");
1181
1182 bzero(&req, sizeof(req));
1183
1184 req.type = CTL_ISCSI_RECEIVE;
1185 req.data.receive.connection_id = pdu->pdu_connection->conn_socket;
1186 req.data.receive.bhs = pdu->pdu_bhs;
1187 req.data.receive.data_segment_len = MAX_DATA_SEGMENT_LENGTH;
1188 req.data.receive.data_segment = pdu->pdu_data;
1189
1190 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
1191 log_err(1, "error issuing CTL_ISCSI ioctl; "
1192 "dropping connection");
1193 }
1194
1195 if (req.status != CTL_ISCSI_OK) {
1196 log_errx(1, "error returned from CTL iSCSI receive: "
1197 "%s; dropping connection", req.error_str);
1198 }
1199
1200 }
1201
1202 #endif /* ICL_KERNEL_PROXY */
1203
1204 /*
1205 * XXX: I CANT INTO LATIN
1206 */
1207 void
kernel_capsicate(void)1208 kernel_capsicate(void)
1209 {
1210 int error;
1211 cap_rights_t rights;
1212 const unsigned long cmds[] = { CTL_ISCSI };
1213
1214 cap_rights_init(&rights, CAP_IOCTL);
1215 error = cap_rights_limit(ctl_fd, &rights);
1216 if (error != 0 && errno != ENOSYS)
1217 log_err(1, "cap_rights_limit");
1218
1219 error = cap_ioctls_limit(ctl_fd, cmds,
1220 sizeof(cmds) / sizeof(cmds[0]));
1221 if (error != 0 && errno != ENOSYS)
1222 log_err(1, "cap_ioctls_limit");
1223
1224 error = cap_enter();
1225 if (error != 0 && errno != ENOSYS)
1226 log_err(1, "cap_enter");
1227
1228 if (cap_sandboxed())
1229 log_debugx("Capsicum capability mode enabled");
1230 else
1231 log_warnx("Capsicum capability mode not supported");
1232 }
1233
1234