1/* $NetBSD: dm_ioctl.c,v 1.30 2015/05/10 14:08:54 christos Exp $ */
2
3/*
4 * Copyright (c) 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Adam Hamsik.
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 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * Locking is used to synchronise between ioctl calls and between dm_table's
34 * users.
35 *
36 * ioctl locking:
37 * Simple reference counting, to count users of device will be used routines
38 * dm_dev_busy/dm_dev_unbusy are used for that.
39 * dm_dev_lookup/dm_dev_rem call dm_dev_busy before return(caller is therefore
40 * holder of reference_counter last).
41 *
42 * ioctl routines which change/remove dm_dev parameters must wait on
43 * dm_dev::dev_cv and when last user will call dm_dev_unbusy they will wake
44 * up them.
45 *
46 * table_head locking:
47 * To access table entries dm_table_* routines must be used.
48 *
49 * dm_table_get_entry will increment table users reference
50 * counter. It will return active or inactive table depends
51 * on uint8_t argument.
52 *
53 * dm_table_release must be called for every table_entry from
54 * dm_table_get_entry. Between these to calls tables can'tbe switched
55 * or destroyed.
56 *
57 * dm_table_head_init initialize talbe_entries SLISTS and io_cv.
58 *
59 * dm_table_head_destroy destroy cv.
60 *
61 * There are two types of users for dm_table_head first type will
62 * only read list and try to do anything with it e.g. dmstrategy,
63 * dm_table_size etc. There is another user for table_head which wants
64 * to change table lists e.g. dm_dev_resume_ioctl, dm_dev_remove_ioctl,
65 * dm_table_clear_ioctl.
66 *
67 * NOTE: It is not allowed to call dm_table_destroy, dm_table_switch_tables
68 * with hold table reference counter. Table reference counter is hold
69 * after calling dm_table_get_entry routine. After calling this
70 * function user must call dm_table_release before any writer table
71 * operation.
72 *
73 * Example: dm_table_get_entry
74 * dm_table_destroy/dm_table_switch_tables
75 * This exaple will lead to deadlock situation because after dm_table_get_entry
76 * table reference counter is != 0 and dm_table_destroy have to wait on cv until
77 * reference counter is 0.
78 *
79 */
80
81#include <sys/types.h>
82#include <sys/param.h>
83
84#include <sys/device.h>
85#include <sys/disk.h>
86#include <sys/disklabel.h>
87#include <sys/kmem.h>
88#include <sys/malloc.h>
89#include <sys/vnode.h>
90
91#include <machine/int_fmtio.h>
92
93#include "netbsd-dm.h"
94#include "dm.h"
95
96static uint32_t sc_minor_num;
97extern const struct dkdriver dmdkdriver;
98uint32_t dm_dev_counter;
99
100/* Generic cf_data for device-mapper driver */
101static struct cfdata dm_cfdata = {
102 .cf_name = "dm",
103 .cf_atname = "dm",
104 .cf_fstate = FSTATE_STAR,
105 .cf_unit = 0
106};
107#define DM_REMOVE_FLAG(flag, name) do { \
108 prop_dictionary_get_uint32(dm_dict,DM_IOCTL_FLAGS,&flag); \
109 flag &= ~name; \
110 prop_dictionary_set_uint32(dm_dict,DM_IOCTL_FLAGS,flag); \
111} while (/*CONSTCOND*/0)
112
113#define DM_ADD_FLAG(flag, name) do { \
114 prop_dictionary_get_uint32(dm_dict,DM_IOCTL_FLAGS,&flag); \
115 flag |= name; \
116 prop_dictionary_set_uint32(dm_dict,DM_IOCTL_FLAGS,flag); \
117} while (/*CONSTCOND*/0)
118
119static int dm_dbg_print_flags(int);
120
121/*
122 * Print flags sent to the kernel from libevmapper.
123 */
124static int
125dm_dbg_print_flags(int flags)
126{
127 aprint_debug("dbg_print --- %d\n", flags);
128
129 if (flags & DM_READONLY_FLAG)
130 aprint_debug("dbg_flags: DM_READONLY_FLAG set In/Out\n");
131
132 if (flags & DM_SUSPEND_FLAG)
133 aprint_debug("dbg_flags: DM_SUSPEND_FLAG set In/Out \n");
134
135 if (flags & DM_PERSISTENT_DEV_FLAG)
136 aprint_debug("db_flags: DM_PERSISTENT_DEV_FLAG set In\n");
137
138 if (flags & DM_STATUS_TABLE_FLAG)
139 aprint_debug("dbg_flags: DM_STATUS_TABLE_FLAG set In\n");
140
141 if (flags & DM_ACTIVE_PRESENT_FLAG)
142 aprint_debug("dbg_flags: DM_ACTIVE_PRESENT_FLAG set Out\n");
143
144 if (flags & DM_INACTIVE_PRESENT_FLAG)
145 aprint_debug("dbg_flags: DM_INACTIVE_PRESENT_FLAG set Out\n");
146
147 if (flags & DM_BUFFER_FULL_FLAG)
148 aprint_debug("dbg_flags: DM_BUFFER_FULL_FLAG set Out\n");
149
150 if (flags & DM_SKIP_BDGET_FLAG)
151 aprint_debug("dbg_flags: DM_SKIP_BDGET_FLAG set In\n");
152
153 if (flags & DM_SKIP_LOCKFS_FLAG)
154 aprint_debug("dbg_flags: DM_SKIP_LOCKFS_FLAG set In\n");
155
156 if (flags & DM_NOFLUSH_FLAG)
157 aprint_debug("dbg_flags: DM_NOFLUSH_FLAG set In\n");
158
159 return 0;
160}
161/*
162 * Get version ioctl call I do it as default therefore this
163 * function is unused now.
164 */
165int
166dm_get_version_ioctl(prop_dictionary_t dm_dict)
167{
168
169 return 0;
170}
171/*
172 * Get list of all available targets from global
173 * target list and sent them back to libdevmapper.
174 */
175int
176dm_list_versions_ioctl(prop_dictionary_t dm_dict)
177{
178 prop_array_t target_list;
179 uint32_t flags;
180
181 flags = 0;
182
183 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
184
185 dm_dbg_print_flags(flags);
186 target_list = dm_target_prop_list();
187
188 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, target_list);
189 prop_object_release(target_list);
190
191 return 0;
192}
193/*
194 * Create in-kernel entry for device. Device attributes such as name, uuid are
195 * taken from proplib dictionary.
196 *
197 */
198int
199dm_dev_create_ioctl(prop_dictionary_t dm_dict)
200{
201 dm_dev_t *dmv;
202 const char *name, *uuid;
203 int r;
204 uint32_t flags;
205 device_t devt;
206
207 r = 0;
208 flags = 0;
209 name = NULL;
210 uuid = NULL;
211
212 /* Get needed values from dictionary. */
213 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
214 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
215 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
216
217 dm_dbg_print_flags(flags);
218
219 /* Lookup name and uuid if device already exist quit. */
220 if ((dmv = dm_dev_lookup(name, uuid, -1)) != NULL) {
221 DM_ADD_FLAG(flags, DM_EXISTS_FLAG); /* Device already exists */
222 dm_dev_unbusy(dmv);
223 return EEXIST;
224 }
225 if ((devt = config_attach_pseudo(&dm_cfdata)) == NULL) {
226 aprint_error("Unable to attach pseudo device dm/%s\n", name);
227 return (ENOMEM);
228 }
229 if ((dmv = dm_dev_alloc()) == NULL)
230 return ENOMEM;
231
232 if (uuid)
233 strncpy(dmv->uuid, uuid, DM_UUID_LEN);
234 else
235 dmv->uuid[0] = '\0';
236
237 if (name)
238 strlcpy(dmv->name, name, DM_NAME_LEN);
239
240 dmv->minor = (uint64_t)atomic_inc_32_nv(&sc_minor_num);
241 dmv->flags = 0; /* device flags are set when needed */
242 dmv->ref_cnt = 0;
243 dmv->event_nr = 0;
244 dmv->dev_type = 0;
245 dmv->devt = devt;
246
247 dm_table_head_init(&dmv->table_head);
248
249 mutex_init(&dmv->dev_mtx, MUTEX_DEFAULT, IPL_NONE);
250 mutex_init(&dmv->diskp_mtx, MUTEX_DEFAULT, IPL_NONE);
251 cv_init(&dmv->dev_cv, "dm_dev");
252
253 if (flags & DM_READONLY_FLAG)
254 dmv->flags |= DM_READONLY_FLAG;
255
256 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
257
258 disk_init(dmv->diskp, dmv->name, &dmdkdriver);
259 disk_attach(dmv->diskp);
260
261 dmv->diskp->dk_info = NULL;
262
263 if ((r = dm_dev_insert(dmv)) != 0)
264 dm_dev_free(dmv);
265
266 DM_ADD_FLAG(flags, DM_EXISTS_FLAG);
267 DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
268
269 /* Increment device counter After creating device */
270 atomic_inc_32(&dm_dev_counter);
271
272 return r;
273}
274/*
275 * Get list of created device-mapper devices fromglobal list and
276 * send it to kernel.
277 *
278 * Output dictionary:
279 *
280 * <key>cmd_data</key>
281 * <array>
282 * <dict>
283 * <key>name<key>
284 * <string>...</string>
285 *
286 * <key>dev</key>
287 * <integer>...</integer>
288 * </dict>
289 * </array>
290 *
291 */
292int
293dm_dev_list_ioctl(prop_dictionary_t dm_dict)
294{
295 prop_array_t dev_list;
296
297 uint32_t flags;
298
299 flags = 0;
300
301 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
302
303 dm_dbg_print_flags(flags);
304
305 dev_list = dm_dev_prop_list();
306
307 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, dev_list);
308 prop_object_release(dev_list);
309
310 return 0;
311}
312/*
313 * Rename selected devices old name is in struct dm_ioctl.
314 * newname is taken from dictionary
315 *
316 * <key>cmd_data</key>
317 * <array>
318 * <string>...</string>
319 * </array>
320 */
321int
322dm_dev_rename_ioctl(prop_dictionary_t dm_dict)
323{
324 prop_array_t cmd_array;
325 dm_dev_t *dmv;
326
327 const char *name, *uuid, *n_name;
328 uint32_t flags, minor;
329
330 name = NULL;
331 uuid = NULL;
332 minor = 0;
333
334 /* Get needed values from dictionary. */
335 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
336 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
337 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
338 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
339
340 dm_dbg_print_flags(flags);
341
342 cmd_array = prop_dictionary_get(dm_dict, DM_IOCTL_CMD_DATA);
343
344 prop_array_get_cstring_nocopy(cmd_array, 0, &n_name);
345
346 if (strlen(n_name) + 1 > DM_NAME_LEN)
347 return EINVAL;
348
349 if ((dmv = dm_dev_rem(name, uuid, minor)) == NULL) {
350 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
351 return ENOENT;
352 }
353 /* change device name */
354 /*
355 * XXX How to deal with this change, name only used in
356 * dm_dev_routines, should I add dm_dev_change_name which will run
357 * under the dm_dev_list mutex ?
358 */
359 strlcpy(dmv->name, n_name, DM_NAME_LEN);
360
361 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt);
362 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
363 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid);
364
365 dm_dev_insert(dmv);
366
367 return 0;
368}
369/*
370 * Remove device from global list I have to remove active
371 * and inactive tables first.
372 */
373int
374dm_dev_remove_ioctl(prop_dictionary_t dm_dict)
375{
376 dm_dev_t *dmv;
377 const char *name, *uuid;
378 uint32_t flags, minor;
379 device_t devt;
380
381 flags = 0;
382 name = NULL;
383 uuid = NULL;
384
385 /* Get needed values from dictionary. */
386 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
387 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
388 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
389 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
390
391 dm_dbg_print_flags(flags);
392
393 /*
394 * This seems as hack to me, probably use routine dm_dev_get_devt to
395 * atomicaly get devt from device.
396 */
397 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
398 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
399 return ENOENT;
400 }
401 devt = dmv->devt;
402
403 dm_dev_unbusy(dmv);
404
405 /*
406 * This will call dm_detach routine which will actually removes
407 * device.
408 */
409 return config_detach(devt, DETACH_QUIET);
410}
411/*
412 * Return actual state of device to libdevmapper.
413 */
414int
415dm_dev_status_ioctl(prop_dictionary_t dm_dict)
416{
417 dm_dev_t *dmv;
418 const char *name, *uuid;
419 uint32_t flags, j, minor;
420
421 name = NULL;
422 uuid = NULL;
423 flags = 0;
424 j = 0;
425
426 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
427 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
428 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
429 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
430
431 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
432 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
433 return ENOENT;
434 }
435 dm_dbg_print_flags(dmv->flags);
436
437 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt);
438 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
439 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid);
440
441 if (dmv->flags & DM_SUSPEND_FLAG)
442 DM_ADD_FLAG(flags, DM_SUSPEND_FLAG);
443
444 /*
445 * Add status flags for tables I have to check both active and
446 * inactive tables.
447 */
448 if ((j = dm_table_get_target_count(&dmv->table_head, DM_TABLE_ACTIVE))) {
449 DM_ADD_FLAG(flags, DM_ACTIVE_PRESENT_FLAG);
450 } else
451 DM_REMOVE_FLAG(flags, DM_ACTIVE_PRESENT_FLAG);
452
453 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_TARGET_COUNT, j);
454
455 if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_INACTIVE))
456 DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
457 else
458 DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
459
460 dm_dev_unbusy(dmv);
461
462 return 0;
463}
464/*
465 * Set only flag to suggest that device is suspended. This call is
466 * not supported in NetBSD.
467 *
468 */
469int
470dm_dev_suspend_ioctl(prop_dictionary_t dm_dict)
471{
472 dm_dev_t *dmv;
473 const char *name, *uuid;
474 uint32_t flags, minor;
475
476 name = NULL;
477 uuid = NULL;
478 flags = 0;
479
480 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
481 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
482 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
483 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
484
485 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
486 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
487 return ENOENT;
488 }
489 atomic_or_32(&dmv->flags, DM_SUSPEND_FLAG);
490
491 dm_dbg_print_flags(dmv->flags);
492
493 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt);
494 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, dmv->flags);
495 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
496
497 dm_dev_unbusy(dmv);
498
499 /* Add flags to dictionary flag after dmv -> dict copy */
500 DM_ADD_FLAG(flags, DM_EXISTS_FLAG);
501
502 return 0;
503}
504/*
505 * Simulate Linux behaviour better and switch tables here and not in
506 * dm_table_load_ioctl.
507 */
508int
509dm_dev_resume_ioctl(prop_dictionary_t dm_dict)
510{
511 dm_dev_t *dmv;
512 const char *name, *uuid;
513 uint32_t flags, minor;
514
515 name = NULL;
516 uuid = NULL;
517 flags = 0;
518
519 /*
520 * char *xml; xml = prop_dictionary_externalize(dm_dict);
521 * printf("%s\n",xml);
522 */
523
524 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
525 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
526 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
527 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
528
529 /* Remove device from global device list */
530 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
531 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
532 return ENOENT;
533 }
534 atomic_and_32(&dmv->flags, ~(DM_SUSPEND_FLAG | DM_INACTIVE_PRESENT_FLAG));
535 atomic_or_32(&dmv->flags, DM_ACTIVE_PRESENT_FLAG);
536
537 dm_table_switch_tables(&dmv->table_head);
538
539 DM_ADD_FLAG(flags, DM_EXISTS_FLAG);
540
541 dmgetproperties(dmv->diskp, &dmv->table_head);
542
543 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt);
544 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, flags);
545 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
546
547 dm_dev_unbusy(dmv);
548
549 /* Destroy inactive table after resume. */
550 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
551
552 return 0;
553}
554/*
555 * Table management routines
556 * lvm2tools doens't send name/uuid to kernel with table
557 * for lookup I have to use minor number.
558 */
559
560/*
561 * Remove inactive table from device. Routines which work's with inactive tables
562 * doesn't need to synchronise with dmstrategy. They can synchronise themselves with mutex?.
563 *
564 */
565int
566dm_table_clear_ioctl(prop_dictionary_t dm_dict)
567{
568 dm_dev_t *dmv;
569 const char *name, *uuid;
570 uint32_t flags, minor;
571
572 dmv = NULL;
573 name = NULL;
574 uuid = NULL;
575 flags = 0;
576 minor = 0;
577
578 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
579 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
580 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
581 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
582
583 aprint_debug("Clearing inactive table from device: %s--%s\n",
584 name, uuid);
585
586 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
587 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
588 return ENOENT;
589 }
590 /* Select unused table */
591 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
592
593 atomic_and_32(&dmv->flags, ~DM_INACTIVE_PRESENT_FLAG);
594
595 dm_dev_unbusy(dmv);
596
597 return 0;
598}
599/*
600 * Get list of physical devices for active table.
601 * Get dev_t from pdev vnode and insert it into cmd_array.
602 *
603 * XXX. This function is called from lvm2tools to get information
604 * about physical devices, too e.g. during vgcreate.
605 */
606int
607dm_table_deps_ioctl(prop_dictionary_t dm_dict)
608{
609 dm_dev_t *dmv;
610 dm_table_t *tbl;
611 dm_table_entry_t *table_en;
612
613 prop_array_t cmd_array;
614 const char *name, *uuid;
615 uint32_t flags, minor;
616
617 int table_type;
618
619 name = NULL;
620 uuid = NULL;
621 dmv = NULL;
622 flags = 0;
623
624 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
625 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
626 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
627 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
628
629 /* create array for dev_t's */
630 cmd_array = prop_array_create();
631
632 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
633 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
634 return ENOENT;
635 }
636 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
637 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_NAME, dmv->name);
638 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid);
639
640 aprint_debug("Getting table deps for device: %s\n", dmv->name);
641
642 /*
643 * if DM_QUERY_INACTIVE_TABLE_FLAG is passed we need to query
644 * INACTIVE TABLE
645 */
646 if (flags & DM_QUERY_INACTIVE_TABLE_FLAG)
647 table_type = DM_TABLE_INACTIVE;
648 else
649 table_type = DM_TABLE_ACTIVE;
650
651 tbl = dm_table_get_entry(&dmv->table_head, table_type);
652
653 SLIST_FOREACH(table_en, tbl, next)
654 table_en->target->deps(table_en, cmd_array);
655
656 dm_table_release(&dmv->table_head, table_type);
657 dm_dev_unbusy(dmv);
658
659 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array);
660 prop_object_release(cmd_array);
661
662 return 0;
663}
664/*
665 * Load new table/tables to device.
666 * Call apropriate target init routine open all physical pdev's and
667 * link them to device. For other targets mirror, strip, snapshot
668 * etc. also add dependency devices to upcalls list.
669 *
670 * Load table to inactive slot table are switched in dm_device_resume_ioctl.
671 * This simulates Linux behaviour better there should not be any difference.
672 *
673 */
674int
675dm_table_load_ioctl(prop_dictionary_t dm_dict)
676{
677 dm_dev_t *dmv;
678 dm_table_entry_t *table_en, *last_table;
679 dm_table_t *tbl;
680 dm_target_t *target;
681
682 prop_object_iterator_t iter;
683 prop_array_t cmd_array;
684 prop_dictionary_t target_dict;
685
686 const char *name, *uuid, *type;
687
688 uint32_t flags, ret, minor;
689
690 char *str;
691
692 ret = 0;
693 flags = 0;
694 name = NULL;
695 uuid = NULL;
696 dmv = NULL;
697 last_table = NULL;
698 str = NULL;
699
700 /*
701 * char *xml; xml = prop_dictionary_externalize(dm_dict);
702 * printf("%s\n",xml);
703 */
704
705 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
706 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
707 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
708 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
709
710 cmd_array = prop_dictionary_get(dm_dict, DM_IOCTL_CMD_DATA);
711 iter = prop_array_iterator(cmd_array);
712 dm_dbg_print_flags(flags);
713
714 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
715 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
716 prop_object_iterator_release(iter);
717 return ENOENT;
718 }
719 aprint_debug("Loading table to device: %s--%d\n", name,
720 dmv->table_head.cur_active_table);
721
722 /*
723 * I have to check if this table slot is not used by another table list.
724 * if it is used I should free them.
725 */
726 if (dmv->flags & DM_INACTIVE_PRESENT_FLAG)
727 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
728
729 dm_dbg_print_flags(dmv->flags);
730 tbl = dm_table_get_entry(&dmv->table_head, DM_TABLE_INACTIVE);
731
732 aprint_debug("dmv->name = %s\n", dmv->name);
733
734 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
735
736 while ((target_dict = prop_object_iterator_next(iter)) != NULL) {
737
738 prop_dictionary_get_cstring_nocopy(target_dict,
739 DM_TABLE_TYPE, &type);
740 /*
741 * If we want to deny table with 2 or more different
742 * target we should do it here
743 */
744 if (((target = dm_target_lookup(type)) == NULL) &&
745 ((target = dm_target_autoload(type)) == NULL)) {
746 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE);
747 dm_dev_unbusy(dmv);
748 prop_object_iterator_release(iter);
749 return ENOENT;
750 }
751 if ((table_en = kmem_alloc(sizeof(dm_table_entry_t),
752 KM_SLEEP)) == NULL) {
753 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE);
754 dm_dev_unbusy(dmv);
755 prop_object_iterator_release(iter);
756 return ENOMEM;
757 }
758 prop_dictionary_get_uint64(target_dict, DM_TABLE_START,
759 &table_en->start);
760 prop_dictionary_get_uint64(target_dict, DM_TABLE_LENGTH,
761 &table_en->length);
762
763 table_en->target = target;
764 table_en->dm_dev = dmv;
765 table_en->target_config = NULL;
766
767 /*
768 * There is a parameter string after dm_target_spec
769 * structure which points to /dev/wd0a 284 part of
770 * table. String str points to this text. This can be
771 * null and therefore it should be checked before we try to
772 * use it.
773 */
774 prop_dictionary_get_cstring(target_dict,
775 DM_TABLE_PARAMS, (char **) &str);
776
777 if (SLIST_EMPTY(tbl) || last_table == NULL)
778 /* insert this table to head */
779 SLIST_INSERT_HEAD(tbl, table_en, next);
780 else
781 SLIST_INSERT_AFTER(last_table, table_en, next);
782
783 /*
784 * Params string is different for every target,
785 * therfore I have to pass it to target init
786 * routine and parse parameters there.
787 */
788
789 if ((ret = target->init(dmv, &table_en->target_config,
790 str)) != 0) {
791
792 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE);
793 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
794 free(str, M_TEMP);
795
796 dm_dev_unbusy(dmv);
797 dm_target_unbusy(target);
798 prop_object_iterator_release(iter);
799 return ret;
800 }
801 last_table = table_en;
802 free(str, M_TEMP);
803 }
804 prop_object_iterator_release(iter);
805
806 DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
807 atomic_or_32(&dmv->flags, DM_INACTIVE_PRESENT_FLAG);
808
809 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE);
810 dm_dev_unbusy(dmv);
811 return 0;
812}
813/*
814 * Get description of all tables loaded to device from kernel
815 * and send it to libdevmapper.
816 *
817 * Output dictionary for every table:
818 *
819 * <key>cmd_data</key>
820 * <array>
821 * <dict>
822 * <key>type<key>
823 * <string>...</string>
824 *
825 * <key>start</key>
826 * <integer>...</integer>
827 *
828 * <key>length</key>
829 * <integer>...</integer>
830 *
831 * <key>params</key>
832 * <string>...</string>
833 * </dict>
834 * </array>
835 *
836 */
837int
838dm_table_status_ioctl(prop_dictionary_t dm_dict)
839{
840 dm_dev_t *dmv;
841 dm_table_t *tbl;
842 dm_table_entry_t *table_en;
843
844 prop_array_t cmd_array;
845 prop_dictionary_t target_dict;
846
847 uint32_t minor, flags;
848
849 const char *name, *uuid;
850 char *params;
851 int table_type;
852
853 dmv = NULL;
854 uuid = NULL;
855 name = NULL;
856 params = NULL;
857 flags = 0;
858
859 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
860 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
861 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
862 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
863
864 cmd_array = prop_array_create();
865
866 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
867 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
868 return ENOENT;
869 }
870 /*
871 * if DM_QUERY_INACTIVE_TABLE_FLAG is passed we need to query
872 * INACTIVE TABLE
873 */
874 if (flags & DM_QUERY_INACTIVE_TABLE_FLAG)
875 table_type = DM_TABLE_INACTIVE;
876 else
877 table_type = DM_TABLE_ACTIVE;
878
879 if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_ACTIVE))
880 DM_ADD_FLAG(flags, DM_ACTIVE_PRESENT_FLAG);
881 else {
882 DM_REMOVE_FLAG(flags, DM_ACTIVE_PRESENT_FLAG);
883
884 if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_INACTIVE))
885 DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
886 else {
887 DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
888 }
889 }
890
891 if (dmv->flags & DM_SUSPEND_FLAG)
892 DM_ADD_FLAG(flags, DM_SUSPEND_FLAG);
893
894 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
895
896 aprint_debug("Status of device tables: %s--%d\n",
897 name, dmv->table_head.cur_active_table);
898
899 tbl = dm_table_get_entry(&dmv->table_head, table_type);
900
901 SLIST_FOREACH(table_en, tbl, next) {
902 target_dict = prop_dictionary_create();
903 aprint_debug("%016" PRIu64 ", length %016" PRIu64
904 ", target %s\n", table_en->start, table_en->length,
905 table_en->target->name);
906
907 prop_dictionary_set_uint64(target_dict, DM_TABLE_START,
908 table_en->start);
909 prop_dictionary_set_uint64(target_dict, DM_TABLE_LENGTH,
910 table_en->length);
911
912 prop_dictionary_set_cstring(target_dict, DM_TABLE_TYPE,
913 table_en->target->name);
914
915 /* dm_table_get_cur_actv.table ?? */
916 prop_dictionary_set_int32(target_dict, DM_TABLE_STAT,
917 dmv->table_head.cur_active_table);
918
919 if (flags & DM_STATUS_TABLE_FLAG) {
920 params = table_en->target->status
921 (table_en->target_config);
922
923 if (params != NULL) {
924 prop_dictionary_set_cstring(target_dict,
925 DM_TABLE_PARAMS, params);
926
927 kmem_free(params, DM_MAX_PARAMS_SIZE);
928 }
929 }
930 prop_array_add(cmd_array, target_dict);
931 prop_object_release(target_dict);
932 }
933
934 dm_table_release(&dmv->table_head, table_type);
935 dm_dev_unbusy(dmv);
936
937 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, flags);
938 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array);
939 prop_object_release(cmd_array);
940
941 return 0;
942}
943
944
945/*
946 * For every call I have to set kernel driver version.
947 * Because I can have commands supported only in other
948 * newer/later version. This routine is called for every
949 * ioctl command.
950 */
951int
952dm_check_version(prop_dictionary_t dm_dict)
953{
954 size_t i;
955 uint32_t dm_version[3];
956 prop_array_t ver;
957
958 ver = prop_dictionary_get(dm_dict, DM_IOCTL_VERSION);
959
960 for (i = 0; i < 3; i++)
961 prop_array_get_uint32(ver, i, &dm_version[i]);
962
963 if (DM_VERSION_MAJOR != dm_version[0] || DM_VERSION_MINOR < dm_version[1]) {
964 aprint_debug("libdevmapper/kernel version mismatch "
965 "kernel: %d.%d.%d libdevmapper: %d.%d.%d\n",
966 DM_VERSION_MAJOR, DM_VERSION_MINOR, DM_VERSION_PATCHLEVEL,
967 dm_version[0], dm_version[1], dm_version[2]);
968
969 return EIO;
970 }
971 prop_array_set_uint32(ver, 0, DM_VERSION_MAJOR);
972 prop_array_set_uint32(ver, 1, DM_VERSION_MINOR);
973 prop_array_set_uint32(ver, 2, DM_VERSION_PATCHLEVEL);
974
975 prop_dictionary_set(dm_dict, DM_IOCTL_VERSION, ver);
976
977 return 0;
978}
979