1 /* $NetBSD: libdm-nbsd-iface.c,v 1.7 2010/03/12 16:24:40 haad Exp $ */
2
3 /*
4 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
5 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
6 * Copyright (C) 2008 Adam Hamsik. All rights reserved.
7 *
8 * This file is part of the device-mapper userspace tools.
9 *
10 * This copyrighted material is made available to anyone wishing to use,
11 * modify, copy, or redistribute it subject to the terms and conditions
12 * of the GNU Lesser General Public License v.2.1.
13 *
14 * You should have received a copy of the GNU Lesser General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19 #include "dmlib.h"
20 #include "libdm-targets.h"
21 #include "libdm-common.h"
22 #include "libdm-netbsd.h"
23
24 #include <sys/ioctl.h>
25 #include <sys/sysctl.h>
26
27 #include <fcntl.h>
28 #include <dirent.h>
29 #include <limits.h>
30
31 #include <dev/dm/netbsd-dm.h>
32
33 #include <dm-ioctl.h>
34
35 #ifdef RUMP_ACTION
36 #include <rump/rump.h>
37 #include <rump/rump_syscalls.h>
38 #endif
39
40 /*
41 * Ensure build compatibility.
42 * The hard-coded versions here are the highest present
43 * in the _cmd_data arrays.
44 */
45
46 #if !((DM_VERSION_MAJOR == 1 && DM_VERSION_MINOR >= 0) || \
47 (DM_VERSION_MAJOR == 4 && DM_VERSION_MINOR >= 0))
48 #error The version of dm-ioctl.h included is incompatible.
49 #endif
50
51 /* dm major version no for running kernel */
52 static unsigned _dm_version_minor = 0;
53 static unsigned _dm_version_patchlevel = 0;
54
55 static int _control_fd = -1;
56 static int _version_checked = 0;
57 static int _version_ok = 1;
58 static unsigned _ioctl_buffer_double_factor = 0;
59
60 /* *INDENT-OFF* */
61
62 /*
63 * XXX Remove this structure and write another own one
64 * I don't understand why ioctl calls has different
65 * names then dm task type
66 */
67 static struct cmd_data _cmd_data_v4[] = {
68 {"create", DM_DEV_CREATE, {4, 0, 0}},
69 {"reload", DM_TABLE_LOAD, {4, 0, 0}}, /* DM_DEVICE_RELOAD */
70 {"remove", DM_DEV_REMOVE, {4, 0, 0}},
71 {"remove_all", DM_REMOVE_ALL, {4, 0, 0}},
72 {"suspend", DM_DEV_SUSPEND, {4, 0, 0}},
73 {"resume", DM_DEV_SUSPEND, {4, 0, 0}},
74 {"info", DM_DEV_STATUS, {4, 0, 0}},
75 {"deps", DM_TABLE_DEPS, {4, 0, 0}}, /* DM_DEVICE_DEPS */
76 {"rename", DM_DEV_RENAME, {4, 0, 0}},
77 {"version", DM_VERSION, {4, 0, 0}},
78 {"status", DM_TABLE_STATUS, {4, 0, 0}},
79 {"table", DM_TABLE_STATUS, {4, 0, 0}}, /* DM_DEVICE_TABLE */
80 {"waitevent", DM_DEV_WAIT, {4, 0, 0}},
81 {"names", DM_LIST_DEVICES, {4, 0, 0}},
82 {"clear", DM_TABLE_CLEAR, {4, 0, 0}},
83 {"mknodes", DM_DEV_STATUS, {4, 0, 0}},
84 #ifdef DM_LIST_VERSIONS
85 {"targets", DM_LIST_VERSIONS, {4, 1, 0}},
86 #endif
87 #ifdef DM_TARGET_MSG
88 {"message", DM_TARGET_MSG, {4, 2, 0}},
89 #endif
90 #ifdef DM_DEV_SET_GEOMETRY
91 {"setgeometry", DM_DEV_SET_GEOMETRY, {4, 6, 0}},
92 #endif
93 };
94 /* *INDENT-ON* */
95
96 /*
97 * In NetBSD we use sysctl to get kernel drivers info. control device
98 * has predefined minor number 0 and major number = char major number
99 * of dm driver. First slot is therefore ocupied with control device
100 * and minor device starts from 1;
101 */
102
_control_device_number(uint32_t * major,uint32_t * minor)103 static int _control_device_number(uint32_t *major, uint32_t *minor)
104 {
105
106 nbsd_get_dm_major(major, DM_CHAR_MAJOR);
107
108 *minor = 0;
109
110 return 1;
111 }
112
113 /*
114 * Returns 1 if exists; 0 if it doesn't; -1 if it's wrong
115 */
_control_exists(const char * control,uint32_t major,uint32_t minor)116 static int _control_exists(const char *control, uint32_t major, uint32_t minor)
117 {
118 struct stat buf;
119
120 if (stat(control, &buf) < 0) {
121 if (errno != ENOENT)
122 log_sys_error("stat", control);
123 return 0;
124 }
125
126 if (!S_ISCHR(buf.st_mode)) {
127 log_verbose("%s: Wrong inode type", control);
128 if (!unlink(control))
129 return 0;
130 log_sys_error("unlink", control);
131 return -1;
132 }
133
134 if (major && buf.st_rdev != MKDEV(major, minor)) {
135 log_verbose("%s: Wrong device number: (%u, %u) instead of "
136 "(%u, %u)", control,
137 MAJOR(buf.st_mode), MINOR(buf.st_mode),
138 major, minor);
139 if (!unlink(control))
140 return 0;
141 log_sys_error("unlink", control);
142 return -1;
143 }
144
145 return 1;
146 }
147
_create_control(const char * control,uint32_t major,uint32_t minor)148 static int _create_control(const char *control, uint32_t major, uint32_t minor)
149 {
150 int ret;
151 mode_t old_umask;
152
153 if (!major)
154 return 0;
155
156 old_umask = umask(0022);
157 ret = dm_create_dir(dm_dir());
158 umask(old_umask);
159
160 if (!ret)
161 return 0;
162
163 log_verbose("Creating device %s (%u, %u)", control, major, minor);
164
165 if (mknod(control, S_IFCHR | S_IRUSR | S_IWUSR,
166 MKDEV(major, minor)) < 0) {
167 log_sys_error("mknod", control);
168 return 0;
169 }
170
171
172 return 1;
173 }
174
175 /* Check if major is device-mapper block device major number */
dm_is_dm_major(uint32_t major)176 int dm_is_dm_major(uint32_t major)
177 {
178 uint32_t dm_major;
179
180 nbsd_get_dm_major(&dm_major, DM_BLOCK_MAJOR);
181
182 if (major == dm_major)
183 return 1;
184
185 return 0;
186 }
187
188 /* Open control device if doesn't exist create it. */
_open_control(void)189 static int _open_control(void)
190 {
191 char control[PATH_MAX];
192 uint32_t major = 0, minor = 0;
193
194 if (_control_fd != -1)
195 return 1;
196
197 #ifdef RUMP_ACTION
198 rump_init();
199 #endif
200 snprintf(control, sizeof(control), "%s/control", dm_dir());
201
202 if (!_control_device_number(&major, &minor))
203 log_error("Is device-mapper driver missing from kernel?");
204
205 if (!_control_exists(control, major, minor) &&
206 !_create_control(control, major, minor))
207 goto error;
208
209 if ((_control_fd = open(control, O_RDWR)) < 0) {
210 log_sys_error("open", control);
211 goto error;
212 }
213
214 return 1;
215
216 error:
217 log_error("Failure to communicate with kernel device-mapper driver.");
218 return 0;
219 }
220
221 /*
222 * Destroy dm task structure there are some dynamically alocated values there.
223 * name, uuid, head, tail list.
224 */
dm_task_destroy(struct dm_task * dmt)225 void dm_task_destroy(struct dm_task *dmt)
226 {
227 struct target *t, *n;
228
229 for (t = dmt->head; t; t = n) {
230 n = t->next;
231 dm_free(t->params);
232 dm_free(t->type);
233 dm_free(t);
234 }
235
236 if (dmt->dev_name)
237 dm_free(dmt->dev_name);
238
239 if (dmt->newname)
240 dm_free(dmt->newname);
241
242 if (dmt->message)
243 dm_free(dmt->message);
244
245 if (dmt->dmi.v4)
246 dm_free(dmt->dmi.v4);
247
248 if (dmt->uuid)
249 dm_free(dmt->uuid);
250
251 dm_free(dmt);
252
253 }
254
255 /* Get kernel driver version from dm_ioctl structure. */
dm_task_get_driver_version(struct dm_task * dmt,char * version,size_t size)256 int dm_task_get_driver_version(struct dm_task *dmt, char *version, size_t size)
257 {
258 unsigned *v;
259
260 if (!dmt->dmi.v4) {
261 version[0] = '\0';
262 return 0;
263 }
264
265 v = dmt->dmi.v4->version;
266 snprintf(version, size, "%u.%u.%u", v[0], v[1], v[2]);
267 _dm_version_minor = v[1];
268 _dm_version_patchlevel = v[2];
269
270 return 1;
271 }
272
273 /* Get kernel driver protocol version and comapre it with library version. */
_check_version(char * version,size_t size)274 static int _check_version(char *version, size_t size)
275 {
276 struct dm_task *task;
277 int r;
278
279 if (!(task = dm_task_create(DM_DEVICE_VERSION))) {
280 log_error("Failed to get device-mapper version");
281 version[0] = '\0';
282 return 0;
283 }
284
285 r = dm_task_run(task);
286 dm_task_get_driver_version(task, version, size);
287 dm_task_destroy(task);
288
289 return r;
290 }
291
292 /*
293 * Find out device-mapper's major version number the first time
294 * this is called and whether or not we support it.
295 */
dm_check_version(void)296 int dm_check_version(void)
297 {
298 char dmversion[64];
299
300 if (_version_checked)
301 return _version_ok;
302
303 _version_checked = 1;
304
305 if (_check_version(dmversion, sizeof(dmversion)))
306 return 1;
307
308
309 return 0;
310 }
311
dm_cookie_supported(void)312 int dm_cookie_supported(void)
313 {
314 return (0);
315 }
316
317 /* Get next target(table description) from list pointed by dmt->head. */
dm_get_next_target(struct dm_task * dmt,void * next,uint64_t * start,uint64_t * length,char ** target_type,char ** params)318 void *dm_get_next_target(struct dm_task *dmt, void *next,
319 uint64_t *start, uint64_t *length,
320 char **target_type, char **params)
321 {
322 struct target *t = (struct target *) next;
323
324 if (!t)
325 t = dmt->head;
326
327 if (!t)
328 return NULL;
329
330 *start = t->start;
331 *length = t->length;
332 *target_type = t->type;
333 *params = t->params;
334
335 return t->next;
336 }
337
338 /* Unmarshall the target info returned from a status call */
_unmarshal_status(struct dm_task * dmt,struct dm_ioctl * dmi)339 static int _unmarshal_status(struct dm_task *dmt, struct dm_ioctl *dmi)
340 {
341 char *outbuf = (char *) dmi + dmi->data_start;
342 char *outptr = outbuf;
343 uint32_t i;
344 struct dm_target_spec *spec;
345
346 for (i = 0; i < dmi->target_count; i++) {
347 spec = (struct dm_target_spec *) outptr;
348 if (!dm_task_add_target(dmt, spec->sector_start,
349 spec->length,
350 spec->target_type,
351 outptr + sizeof(*spec))) {
352 return 0;
353 }
354
355 outptr = outbuf + spec->next;
356 }
357
358 return 1;
359 }
360
361 static char *
get_dev_name(char * d_name,uint32_t d_major,uint32_t d_minor)362 get_dev_name(char *d_name, uint32_t d_major, uint32_t d_minor)
363 {
364 static char d_buf[MAXPATHLEN];
365 struct dirent *dire;
366 struct stat st;
367 DIR *dev_dir;
368
369 int err;
370 char *name;
371
372 dev_dir = opendir("/dev");
373
374 while ((dire = readdir(dev_dir)) != NULL) {
375
376 if (strstr(dire->d_name, d_name) == NULL)
377 continue;
378
379 snprintf(d_buf, MAXPATHLEN, "/dev/%s", dire->d_name);
380
381 if ((err = stat(d_buf, &st)) < 0)
382 printf("stat failed with %d\n", err);
383
384 if (st.st_mode & S_IFBLK){
385 if ((major(st.st_rdev) == d_major) && (minor(st.st_rdev) == d_minor)) {
386 strncpy(d_buf, dire->d_name, strlen(dire->d_name) + 1);
387 name = d_buf;
388 break;
389 }
390 }
391
392 memset(d_buf, '0', sizeof(d_buf));
393 }
394
395 (void)closedir(dev_dir);
396
397 return name;
398 }
399
400 /*
401 * @dev_major is major number of char device
402 *
403 * I have to find it's block device number and lookup dev in
404 * device database to find device path.
405 *
406 */
407
dm_format_dev(char * buf,int bufsize,uint32_t dev_major,uint32_t dev_minor)408 int dm_format_dev(char *buf, int bufsize, uint32_t dev_major,
409 uint32_t dev_minor)
410 {
411 int r;
412 uint32_t major, dm_major;
413 char *name;
414 mode_t mode;
415 dev_t dev;
416 size_t val_len,i;
417 struct kinfo_drivers *kd;
418
419 mode = 0;
420
421 nbsd_get_dm_major(&dm_major, DM_BLOCK_MAJOR);
422
423 if (bufsize < 8)
424 return 0;
425
426 if (sysctlbyname("kern.drivers",NULL,&val_len,NULL,0) < 0) {
427 printf("sysctlbyname failed");
428 return 0;
429 }
430
431 if ((kd = malloc (val_len)) == NULL){
432 printf("malloc kd info error\n");
433 return 0;
434 }
435
436 if (sysctlbyname("kern.drivers", kd, &val_len, NULL, 0) < 0) {
437 printf("sysctlbyname failed kd");
438 return 0;
439 }
440
441 for (i = 0, val_len /= sizeof(*kd); i < val_len; i++){
442 if (kd[i].d_cmajor == dev_major) {
443 major = kd[i].d_bmajor;
444 break;
445 }
446 }
447
448 dev = MKDEV(major,dev_minor);
449
450 mode |= S_IFBLK;
451
452 if ((name = devname(dev,mode)) == NULL)
453 name = get_dev_name(kd[i].d_name, major, dev_minor);
454
455 r = snprintf(buf, (size_t) bufsize, "/dev/%s",name);
456
457 free(kd);
458
459 if (r < 0 || r > bufsize - 1 || name == NULL)
460 return 0;
461
462 return 1;
463 }
464
465 /* Fill info from dm_ioctl structure. Look at DM_EXISTS_FLAG*/
dm_task_get_info(struct dm_task * dmt,struct dm_info * info)466 int dm_task_get_info(struct dm_task *dmt, struct dm_info *info)
467 {
468 if (!dmt->dmi.v4)
469 return 0;
470
471 memset(info, 0, sizeof(*info));
472
473 info->exists = dmt->dmi.v4->flags & DM_EXISTS_FLAG ? 1 : 0;
474 if (!info->exists)
475 return 1;
476
477 info->suspended = dmt->dmi.v4->flags & DM_SUSPEND_FLAG ? 1 : 0;
478 info->read_only = dmt->dmi.v4->flags & DM_READONLY_FLAG ? 1 : 0;
479 info->live_table = dmt->dmi.v4->flags & DM_ACTIVE_PRESENT_FLAG ? 1 : 0;
480 info->inactive_table = dmt->dmi.v4->flags & DM_INACTIVE_PRESENT_FLAG ?
481 1 : 0;
482 info->target_count = dmt->dmi.v4->target_count;
483 info->open_count = dmt->dmi.v4->open_count;
484 info->event_nr = dmt->dmi.v4->event_nr;
485
486 nbsd_get_dm_major(&info->major, DM_BLOCK_MAJOR); /* get netbsd dm device major number */
487 info->minor = MINOR(dmt->dmi.v4->dev);
488
489 return 1;
490 }
491
492 /* Unsupported on NetBSD */
dm_task_get_read_ahead(const struct dm_task * dmt,uint32_t * read_ahead)493 uint32_t dm_task_get_read_ahead(const struct dm_task *dmt, uint32_t *read_ahead)
494 {
495 *read_ahead = DM_READ_AHEAD_NONE;
496 return 1;
497 }
498
dm_task_get_name(const struct dm_task * dmt)499 const char *dm_task_get_name(const struct dm_task *dmt)
500 {
501
502 return (dmt->dmi.v4->name);
503 }
504
dm_task_get_uuid(const struct dm_task * dmt)505 const char *dm_task_get_uuid(const struct dm_task *dmt)
506 {
507
508 return (dmt->dmi.v4->uuid);
509 }
510
dm_task_get_deps(struct dm_task * dmt)511 struct dm_deps *dm_task_get_deps(struct dm_task *dmt)
512 {
513 return (struct dm_deps *) (((void *) dmt->dmi.v4) +
514 dmt->dmi.v4->data_start);
515 }
516
dm_task_get_names(struct dm_task * dmt)517 struct dm_names *dm_task_get_names(struct dm_task *dmt)
518 {
519 return (struct dm_names *) (((void *) dmt->dmi.v4) +
520 dmt->dmi.v4->data_start);
521 }
522
dm_task_get_versions(struct dm_task * dmt)523 struct dm_versions *dm_task_get_versions(struct dm_task *dmt)
524 {
525 return (struct dm_versions *) (((void *) dmt->dmi.v4) +
526 dmt->dmi.v4->data_start);
527 }
528
dm_task_set_ro(struct dm_task * dmt)529 int dm_task_set_ro(struct dm_task *dmt)
530 {
531 dmt->read_only = 1;
532 return 1;
533 }
534
535 /* Unsupported on NetBSD */
dm_task_set_read_ahead(struct dm_task * dmt,uint32_t read_ahead,uint32_t read_ahead_flags)536 int dm_task_set_read_ahead(struct dm_task *dmt, uint32_t read_ahead,
537 uint32_t read_ahead_flags)
538 {
539 return 1;
540 }
541
dm_task_suppress_identical_reload(struct dm_task * dmt)542 int dm_task_suppress_identical_reload(struct dm_task *dmt)
543 {
544 dmt->suppress_identical_reload = 1;
545 return 1;
546 }
547
dm_task_set_newname(struct dm_task * dmt,const char * newname)548 int dm_task_set_newname(struct dm_task *dmt, const char *newname)
549 {
550 if (!(dmt->newname = dm_strdup(newname))) {
551 log_error("dm_task_set_newname: strdup(%s) failed", newname);
552 return 0;
553 }
554
555 return 1;
556 }
557
dm_task_set_message(struct dm_task * dmt,const char * message)558 int dm_task_set_message(struct dm_task *dmt, const char *message)
559 {
560 if (!(dmt->message = dm_strdup(message))) {
561 log_error("dm_task_set_message: strdup(%s) failed", message);
562 return 0;
563 }
564
565 return 1;
566 }
567
dm_task_set_sector(struct dm_task * dmt,uint64_t sector)568 int dm_task_set_sector(struct dm_task *dmt, uint64_t sector)
569 {
570 dmt->sector = sector;
571
572 return 1;
573 }
574
575 /* Unsupported in NetBSD */
dm_task_set_geometry(struct dm_task * dmt,const char * cylinders,const char * heads,const char * sectors,const char * start)576 int dm_task_set_geometry(struct dm_task *dmt, const char *cylinders,
577 const char *heads, const char *sectors, const char *start)
578 {
579 return 0;
580 }
581
dm_task_no_flush(struct dm_task * dmt)582 int dm_task_no_flush(struct dm_task *dmt)
583 {
584 dmt->no_flush = 1;
585
586 return 1;
587 }
588
dm_task_no_open_count(struct dm_task * dmt)589 int dm_task_no_open_count(struct dm_task *dmt)
590 {
591 dmt->no_open_count = 1;
592
593 return 1;
594 }
595
dm_task_skip_lockfs(struct dm_task * dmt)596 int dm_task_skip_lockfs(struct dm_task *dmt)
597 {
598 dmt->skip_lockfs = 1;
599
600 return 1;
601 }
602
dm_task_query_inactive_table(struct dm_task * dmt)603 int dm_task_query_inactive_table(struct dm_task *dmt)
604 {
605 dmt->query_inactive_table = 1;
606
607 return 1;
608 }
609
dm_task_set_event_nr(struct dm_task * dmt,uint32_t event_nr)610 int dm_task_set_event_nr(struct dm_task *dmt, uint32_t event_nr)
611 {
612 dmt->event_nr = event_nr;
613
614 return 1;
615 }
616
617 /* Allocate one target(table description) entry. */
create_target(uint64_t start,uint64_t len,const char * type,const char * params)618 struct target *create_target(uint64_t start, uint64_t len, const char *type,
619 const char *params)
620 {
621 struct target *t = dm_malloc(sizeof(*t));
622
623 if (!t) {
624 log_error("create_target: malloc(%" PRIsize_t ") failed",
625 sizeof(*t));
626 return NULL;
627 }
628
629 memset(t, 0, sizeof(*t));
630
631 if (!(t->params = dm_strdup(params))) {
632 log_error("create_target: strdup(params) failed");
633 goto bad;
634 }
635
636 if (!(t->type = dm_strdup(type))) {
637 log_error("create_target: strdup(type) failed");
638 goto bad;
639 }
640
641 t->start = start;
642 t->length = len;
643 return t;
644
645 bad:
646 dm_free(t->params);
647 dm_free(t->type);
648 dm_free(t);
649 return NULL;
650 }
651
652 /* Parse given dm task structure to proplib dictionary. */
_flatten(struct dm_task * dmt,prop_dictionary_t dm_dict)653 static int _flatten(struct dm_task *dmt, prop_dictionary_t dm_dict)
654 {
655 prop_array_t cmd_array;
656 prop_dictionary_t target_spec;
657
658 struct target *t;
659
660 size_t len;
661 char type[DM_MAX_TYPE_NAME];
662
663 uint32_t major, flags;
664 int count = 0;
665 const int (*version)[3];
666
667 flags = 0;
668 version = &_cmd_data_v4[dmt->type].version;
669
670 cmd_array = prop_array_create();
671
672 for (t = dmt->head; t; t = t->next) {
673 target_spec = prop_dictionary_create();
674
675 prop_dictionary_set_uint64(target_spec,DM_TABLE_START,t->start);
676 prop_dictionary_set_uint64(target_spec,DM_TABLE_LENGTH,t->length);
677
678 strlcpy(type,t->type,DM_MAX_TYPE_NAME);
679
680 prop_dictionary_set_cstring(target_spec,DM_TABLE_TYPE,type);
681 prop_dictionary_set_cstring(target_spec,DM_TABLE_PARAMS,t->params);
682
683 prop_array_set(cmd_array,count,target_spec);
684
685 prop_object_release(target_spec);
686
687 count++;
688 }
689
690
691 if (count && (dmt->sector || dmt->message)) {
692 log_error("targets and message are incompatible");
693 return -1;
694 }
695
696 if (count && dmt->newname) {
697 log_error("targets and newname are incompatible");
698 return -1;
699 }
700
701 if (count && dmt->geometry) {
702 log_error("targets and geometry are incompatible");
703 return -1;
704 }
705
706 if (dmt->newname && (dmt->sector || dmt->message)) {
707 log_error("message and newname are incompatible");
708 return -1;
709 }
710
711 if (dmt->newname && dmt->geometry) {
712 log_error("geometry and newname are incompatible");
713 return -1;
714 }
715
716 if (dmt->geometry && (dmt->sector || dmt->message)) {
717 log_error("geometry and message are incompatible");
718 return -1;
719 }
720
721 if (dmt->sector && !dmt->message) {
722 log_error("message is required with sector");
723 return -1;
724 }
725
726 if (dmt->newname)
727 len += strlen(dmt->newname) + 1;
728
729 if (dmt->message)
730 len += sizeof(struct dm_target_msg) + strlen(dmt->message) + 1;
731
732 if (dmt->geometry)
733 len += strlen(dmt->geometry) + 1;
734
735 nbsd_dmi_add_version((*version), dm_dict);
736
737 nbsd_get_dm_major(&major, DM_BLOCK_MAJOR);
738 /*
739 * Only devices with major which is equal to netbsd dm major
740 * dm devices in NetBSD can't have more majors then one assigned to dm.
741 */
742 if (dmt->major != major && dmt->major != -1)
743 return -1;
744
745 if (dmt->minor >= 0) {
746 flags |= DM_PERSISTENT_DEV_FLAG;
747
748 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmt->minor);
749 }
750
751 /* Set values to dictionary. */
752 if (dmt->dev_name)
753 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_NAME, dmt->dev_name);
754
755 if (dmt->uuid)
756 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmt->uuid);
757
758 if (dmt->type == DM_DEVICE_SUSPEND)
759 flags |= DM_SUSPEND_FLAG;
760 if (dmt->no_flush)
761 flags |= DM_NOFLUSH_FLAG;
762 if (dmt->read_only)
763 flags |= DM_READONLY_FLAG;
764 if (dmt->skip_lockfs)
765 flags |= DM_SKIP_LOCKFS_FLAG;
766
767 if (dmt->query_inactive_table) {
768 if (_dm_version_minor < 16)
769 log_warn("WARNING: Inactive table query unsupported "
770 "by kernel. It will use live table.");
771 flags |= DM_QUERY_INACTIVE_TABLE_FLAG;
772 }
773
774 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, flags);
775
776 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_EVENT, dmt->event_nr);
777
778 if (dmt->newname)
779 prop_array_set_cstring(cmd_array, 0, dmt->newname);
780
781 /* Add array for all COMMAND specific data. */
782 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array);
783 prop_object_release(cmd_array);
784
785 return 0;
786 }
787
_process_mapper_dir(struct dm_task * dmt)788 static int _process_mapper_dir(struct dm_task *dmt)
789 {
790 struct dirent *dirent;
791 DIR *d;
792 const char *dir;
793 int r = 1;
794
795 dir = dm_dir();
796 if (!(d = opendir(dir))) {
797 log_sys_error("opendir", dir);
798 return 0;
799 }
800
801 while ((dirent = readdir(d))) {
802 if (!strcmp(dirent->d_name, ".") ||
803 !strcmp(dirent->d_name, "..") ||
804 !strcmp(dirent->d_name, "control"))
805 continue;
806 dm_task_set_name(dmt, dirent->d_name);
807 dm_task_run(dmt);
808 }
809
810 if (closedir(d))
811 log_sys_error("closedir", dir);
812
813 return r;
814 }
815
816 /* Get list of all devices. */
_process_all_v4(struct dm_task * dmt)817 static int _process_all_v4(struct dm_task *dmt)
818 {
819 struct dm_task *task;
820 struct dm_names *names;
821 unsigned next = 0;
822 int r = 1;
823
824 if (!(task = dm_task_create(DM_DEVICE_LIST)))
825 return 0;
826
827 if (!dm_task_run(task)) {
828 r = 0;
829 goto out;
830 }
831
832 if (!(names = dm_task_get_names(task))) {
833 r = 0;
834 goto out;
835 }
836
837 if (!names->dev)
838 goto out;
839
840 do {
841 names = (void *) names + next;
842 if (!dm_task_set_name(dmt, names->name)) {
843 r = 0;
844 goto out;
845 }
846 if (!dm_task_run(dmt))
847 r = 0;
848 next = names->next;
849 } while (next);
850
851 out:
852 dm_task_destroy(task);
853 return r;
854 }
855
_mknodes_v4(struct dm_task * dmt)856 static int _mknodes_v4(struct dm_task *dmt)
857 {
858 (void) _process_mapper_dir(dmt);
859
860 return _process_all_v4(dmt);
861 }
862
863 /* Create new device and load table to it. */
_create_and_load_v4(struct dm_task * dmt)864 static int _create_and_load_v4(struct dm_task *dmt)
865 {
866 struct dm_task *task;
867 int r;
868
869 printf("create and load called \n");
870
871 /* Use new task struct to create the device */
872 if (!(task = dm_task_create(DM_DEVICE_CREATE))) {
873 log_error("Failed to create device-mapper task struct");
874 return 0;
875 }
876
877 /* Copy across relevant fields */
878 if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) {
879 dm_task_destroy(task);
880 return 0;
881 }
882
883 if (dmt->uuid && !dm_task_set_uuid(task, dmt->uuid)) {
884 dm_task_destroy(task);
885 return 0;
886 }
887
888 task->major = dmt->major;
889 task->minor = dmt->minor;
890 task->uid = dmt->uid;
891 task->gid = dmt->gid;
892 task->mode = dmt->mode;
893
894 r = dm_task_run(task);
895 dm_task_destroy(task);
896 if (!r)
897 return r;
898
899 /* Next load the table */
900 if (!(task = dm_task_create(DM_DEVICE_RELOAD))) {
901 log_error("Failed to create device-mapper task struct");
902 return 0;
903 }
904
905 /* Copy across relevant fields */
906 if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) {
907 dm_task_destroy(task);
908 return 0;
909 }
910
911 task->read_only = dmt->read_only;
912 task->head = dmt->head;
913 task->tail = dmt->tail;
914
915 r = dm_task_run(task);
916
917 task->head = NULL;
918 task->tail = NULL;
919 dm_task_destroy(task);
920 if (!r)
921 goto revert;
922
923 /* Use the original structure last so the info will be correct */
924 dmt->type = DM_DEVICE_RESUME;
925 dm_free(dmt->uuid);
926 dmt->uuid = NULL;
927
928 r = dm_task_run(dmt);
929
930 if (r)
931 return r;
932
933 revert:
934 dmt->type = DM_DEVICE_REMOVE;
935 dm_free(dmt->uuid);
936 dmt->uuid = NULL;
937
938 if (!dm_task_run(dmt))
939 log_error("Failed to revert device creation.");
940
941 return r;
942 }
943
dm_task_get_existing_table_size(struct dm_task * dmt)944 uint64_t dm_task_get_existing_table_size(struct dm_task *dmt)
945 {
946 return dmt->existing_table_size;
947 }
948
_reload_with_suppression_v4(struct dm_task * dmt)949 static int _reload_with_suppression_v4(struct dm_task *dmt)
950 {
951 struct dm_task *task;
952 struct target *t1, *t2;
953 int r;
954
955 /* New task to get existing table information */
956 if (!(task = dm_task_create(DM_DEVICE_TABLE))) {
957 log_error("Failed to create device-mapper task struct");
958 return 0;
959 }
960
961 /* Copy across relevant fields */
962 if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) {
963 dm_task_destroy(task);
964 return 0;
965 }
966
967 if (dmt->uuid && !dm_task_set_uuid(task, dmt->uuid)) {
968 dm_task_destroy(task);
969 return 0;
970 }
971
972 task->major = dmt->major;
973 task->minor = dmt->minor;
974
975 r = dm_task_run(task);
976
977 if (!r) {
978 dm_task_destroy(task);
979 return r;
980 }
981
982 /* Store existing table size */
983 t2 = task->head;
984 while (t2 && t2->next)
985 t2 = t2->next;
986 dmt->existing_table_size = t2 ? t2->start + t2->length : 0;
987
988 if ((task->dmi.v4->flags & DM_READONLY_FLAG) ? 1 : 0 != dmt->read_only)
989 goto no_match;
990
991 t1 = dmt->head;
992 t2 = task->head;
993
994 while (t1 && t2) {
995 while (t2->params[strlen(t2->params) - 1] == ' ')
996 t2->params[strlen(t2->params) - 1] = '\0';
997 if ((t1->start != t2->start) ||
998 (t1->length != t2->length) ||
999 (strcmp(t1->type, t2->type)) ||
1000 (strcmp(t1->params, t2->params)))
1001 goto no_match;
1002 t1 = t1->next;
1003 t2 = t2->next;
1004 }
1005
1006 if (!t1 && !t2) {
1007 dmt->dmi.v4 = task->dmi.v4;
1008 task->dmi.v4 = NULL;
1009 dm_task_destroy(task);
1010 return 1;
1011 }
1012
1013 no_match:
1014 dm_task_destroy(task);
1015
1016 /* Now do the original reload */
1017 dmt->suppress_identical_reload = 0;
1018 r = dm_task_run(dmt);
1019
1020 return r;
1021 }
1022
1023 /*
1024 * This function is heart of NetBSD libdevmapper-> device-mapper kernel protocol
1025 * It creates proplib_dictionary from dm task structure and sends it to NetBSD
1026 * kernel driver. After succesfull ioctl it create dmi structure from returned
1027 * proplib dictionary. This way I keep number of changes in NetBSD version of
1028 * libdevmapper as small as posible.
1029 */
_do_dm_ioctl(struct dm_task * dmt,unsigned command)1030 static struct dm_ioctl *_do_dm_ioctl(struct dm_task *dmt, unsigned command)
1031 {
1032 struct dm_ioctl *dmi;
1033 prop_dictionary_t dm_dict_in, dm_dict_out;
1034
1035 uint32_t flags;
1036
1037 dm_dict_in = NULL;
1038
1039 dm_dict_in = prop_dictionary_create(); /* Dictionary send to kernel */
1040 dm_dict_out = prop_dictionary_create(); /* Dictionary received from kernel */
1041
1042 /* Set command name to dictionary */
1043 prop_dictionary_set_cstring(dm_dict_in, DM_IOCTL_COMMAND,
1044 _cmd_data_v4[dmt->type].name);
1045
1046 /* Parse dmi from libdevmapper to dictionary */
1047 if (_flatten(dmt, dm_dict_in) < 0)
1048 goto bad;
1049
1050 prop_dictionary_get_uint32(dm_dict_in, DM_IOCTL_FLAGS, &flags);
1051
1052 if (dmt->type == DM_DEVICE_TABLE)
1053 flags |= DM_STATUS_TABLE_FLAG;
1054
1055 if (dmt->no_open_count)
1056 flags |= DM_SKIP_BDGET_FLAG;
1057
1058 flags |= DM_EXISTS_FLAG;
1059
1060 /* Set flags to dictionary. */
1061 prop_dictionary_set_uint32(dm_dict_in,DM_IOCTL_FLAGS,flags);
1062
1063 prop_dictionary_externalize_to_file(dm_dict_in,"/tmp/test_in");
1064
1065 log_very_verbose("Ioctl type %s --- flags %d",_cmd_data_v4[dmt->type].name,flags);
1066 //printf("name %s, major %d minor %d\n uuid %s\n",
1067 //dm_task_get_name(dmt), dmt->minor, dmt->major, dm_task_get_uuid(dmt));
1068 /* Send dictionary to kernel and wait for reply. */
1069 #ifdef RUMP_ACTION
1070 struct plistref prefp;
1071 int err;
1072 prop_dictionary_externalize_to_pref(dm_dict_in, &prefp);
1073
1074 if (rump_sys_ioctl(_control_fd, NETBSD_DM_IOCTL, &prefp) != 0) {
1075
1076 dm_dict_out = prop_dictionary_internalize(prefp.pref_plist);
1077 #else
1078 if (prop_dictionary_sendrecv_ioctl(dm_dict_in,_control_fd,
1079 NETBSD_DM_IOCTL,&dm_dict_out) != 0) {
1080 #endif
1081 if (errno == ENOENT &&
1082 ((dmt->type == DM_DEVICE_INFO) ||
1083 (dmt->type == DM_DEVICE_MKNODES) ||
1084 (dmt->type == DM_DEVICE_STATUS))) {
1085
1086 /*
1087 * Linux version doesn't fail when ENOENT is returned
1088 * for nonexisting device after info, deps, mknodes call.
1089 * It returns dmi sent to kernel with DM_EXISTS_FLAG = 0;
1090 */
1091
1092 dmi = nbsd_dm_dict_to_dmi(dm_dict_in,_cmd_data_v4[dmt->type].cmd);
1093
1094 dmi->flags &= ~DM_EXISTS_FLAG;
1095
1096 prop_object_release(dm_dict_in);
1097 prop_object_release(dm_dict_out);
1098
1099 goto out;
1100 } else {
1101 log_error("ioctl %s call failed with errno %d\n",
1102 _cmd_data_v4[dmt->type].name, errno);
1103
1104 prop_object_release(dm_dict_in);
1105 prop_object_release(dm_dict_out);
1106
1107 goto bad;
1108 }
1109 }
1110
1111 #ifdef RUMP_ACTION
1112 dm_dict_out = prop_dictionary_internalize(prefp.pref_plist);
1113 #endif
1114 prop_dictionary_externalize_to_file(dm_dict_out,"/tmp/test_out");
1115
1116 /* Parse kernel dictionary to dmi structure and return it to libdevmapper. */
1117 dmi = nbsd_dm_dict_to_dmi(dm_dict_out,_cmd_data_v4[dmt->type].cmd);
1118
1119 prop_object_release(dm_dict_in);
1120 prop_object_release(dm_dict_out);
1121 out:
1122 return dmi;
1123 bad:
1124 return NULL;
1125 }
1126
1127 /* Create new edvice nodes in mapper/ dir. */
1128 void dm_task_update_nodes(void)
1129 {
1130 update_devs();
1131 }
1132
1133 /* Run dm command which is descirbed in dm_task structure. */
1134 int dm_task_run(struct dm_task *dmt)
1135 {
1136 struct dm_ioctl *dmi;
1137 unsigned command;
1138
1139 if ((unsigned) dmt->type >=
1140 (sizeof(_cmd_data_v4) / sizeof(*_cmd_data_v4))) {
1141 log_error("Internal error: unknown device-mapper task %d",
1142 dmt->type);
1143 return 0;
1144 }
1145
1146 command = _cmd_data_v4[dmt->type].cmd;
1147
1148 /* Old-style creation had a table supplied */
1149 if (dmt->type == DM_DEVICE_CREATE && dmt->head)
1150 return _create_and_load_v4(dmt);
1151
1152 if (dmt->type == DM_DEVICE_MKNODES && !dmt->dev_name &&
1153 !dmt->uuid && dmt->major <= 0)
1154 return _mknodes_v4(dmt);
1155
1156 if ((dmt->type == DM_DEVICE_RELOAD) && dmt->suppress_identical_reload)
1157 return _reload_with_suppression_v4(dmt);
1158
1159 if (!_open_control())
1160 return 0;
1161
1162 if (!(dmi = _do_dm_ioctl(dmt, command)))
1163 return 0;
1164
1165 switch (dmt->type) {
1166 case DM_DEVICE_CREATE:
1167 add_dev_node(dmt->dev_name, MAJOR(dmi->dev), MINOR(dmi->dev),
1168 dmt->uid, dmt->gid, dmt->mode, 0);
1169 break;
1170
1171 case DM_DEVICE_REMOVE:
1172 /* FIXME Kernel needs to fill in dmi->name */
1173 if (dmt->dev_name)
1174 rm_dev_node(dmt->dev_name, 0);
1175 break;
1176
1177 case DM_DEVICE_RENAME:
1178 /* FIXME Kernel needs to fill in dmi->name */
1179 if (dmt->dev_name)
1180 rename_dev_node(dmt->dev_name, dmt->newname, 0);
1181 break;
1182
1183 case DM_DEVICE_RESUME:
1184 /* FIXME Kernel needs to fill in dmi->name */
1185 set_dev_node_read_ahead(dmt->dev_name, dmt->read_ahead,
1186 dmt->read_ahead_flags);
1187 break;
1188
1189 case DM_DEVICE_MKNODES:
1190 if (dmi->flags & DM_EXISTS_FLAG)
1191 add_dev_node(dmi->name, MAJOR(dmi->dev),
1192 MINOR(dmi->dev),
1193 dmt->uid, dmt->gid, dmt->mode, 0);
1194 else if (dmt->dev_name)
1195 rm_dev_node(dmt->dev_name, 0);
1196 break;
1197
1198 case DM_DEVICE_STATUS:
1199 case DM_DEVICE_TABLE:
1200 case DM_DEVICE_WAITEVENT:
1201 if (!_unmarshal_status(dmt, dmi))
1202 goto bad;
1203 break;
1204 }
1205
1206 /* Was structure reused? */
1207 if (dmt->dmi.v4)
1208 dm_free(dmt->dmi.v4);
1209
1210 dmt->dmi.v4 = dmi;
1211 return 1;
1212
1213 bad:
1214 dm_free(dmi);
1215 return 0;
1216 }
1217
1218 void dm_lib_release(void)
1219 {
1220 if (_control_fd != -1) {
1221 close(_control_fd);
1222 _control_fd = -1;
1223 }
1224 update_devs();
1225 }
1226
1227 void dm_lib_exit(void)
1228 {
1229 dm_lib_release();
1230 dm_dump_memory();
1231 _version_ok = 1;
1232 _version_checked = 0;
1233 }
1234