dm - Import verbatim from NetBSD
[dragonfly.git] / sys / dev / disk / dm / dm_ioctl.c
CommitLineData
ff56536e
AH
1/* $NetBSD: dm_ioctl.c,v 1.21 2010/02/25 20:48:58 jakllsch 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 depedns
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 uint64_t sc_minor_num;
97extern const struct dkdriver dmdkdriver;
98uint64_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, flags;
204 device_t devt;
205
206 r = 0;
207 flags = 0;
208 name = NULL;
209 uuid = NULL;
210
211 /* Get needed values from dictionary. */
212 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
213 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
214 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
215
216 dm_dbg_print_flags(flags);
217
218 /* Lookup name and uuid if device already exist quit. */
219 if ((dmv = dm_dev_lookup(name, uuid, -1)) != NULL) {
220 DM_ADD_FLAG(flags, DM_EXISTS_FLAG); /* Device already exists */
221 dm_dev_unbusy(dmv);
222 return EEXIST;
223 }
224 if ((devt = config_attach_pseudo(&dm_cfdata)) == NULL) {
225 aprint_error("Unable to attach pseudo device dm/%s\n", name);
226 return (ENOMEM);
227 }
228 if ((dmv = dm_dev_alloc()) == NULL)
229 return ENOMEM;
230
231 if (uuid)
232 strncpy(dmv->uuid, uuid, DM_UUID_LEN);
233 else
234 dmv->uuid[0] = '\0';
235
236 if (name)
237 strlcpy(dmv->name, name, DM_NAME_LEN);
238
239 dmv->minor = atomic_inc_64_nv(&sc_minor_num);
240 dmv->flags = 0; /* device flags are set when needed */
241 dmv->ref_cnt = 0;
242 dmv->event_nr = 0;
243 dmv->dev_type = 0;
244 dmv->devt = devt;
245
246 dm_table_head_init(&dmv->table_head);
247
248 mutex_init(&dmv->dev_mtx, MUTEX_DEFAULT, IPL_NONE);
249 mutex_init(&dmv->diskp_mtx, MUTEX_DEFAULT, IPL_NONE);
250 cv_init(&dmv->dev_cv, "dm_dev");
251
252 if (flags & DM_READONLY_FLAG)
253 dmv->flags |= DM_READONLY_FLAG;
254
255 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
256
257 disk_init(dmv->diskp, dmv->name, &dmdkdriver);
258 disk_attach(dmv->diskp);
259
260 dmv->diskp->dk_info = NULL;
261
262 if ((r = dm_dev_insert(dmv)) != 0)
263 dm_dev_free(dmv);
264
265 DM_ADD_FLAG(flags, DM_EXISTS_FLAG);
266 DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
267
268 /* Increment device counter After creating device */
269 atomic_inc_64(&dm_dev_counter);
270
271 return r;
272}
273/*
274 * Get list of created device-mapper devices fromglobal list and
275 * send it to kernel.
276 *
277 * Output dictionary:
278 *
279 * <key>cmd_data</key>
280 * <array>
281 * <dict>
282 * <key>name<key>
283 * <string>...</string>
284 *
285 * <key>dev</key>
286 * <integer>...</integer>
287 * </dict>
288 * </array>
289 *
290 */
291int
292dm_dev_list_ioctl(prop_dictionary_t dm_dict)
293{
294 prop_array_t dev_list;
295
296 uint32_t flags;
297
298 flags = 0;
299
300 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
301
302 dm_dbg_print_flags(flags);
303
304 dev_list = dm_dev_prop_list();
305
306 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, dev_list);
307 prop_object_release(dev_list);
308
309 return 0;
310}
311/*
312 * Rename selected devices old name is in struct dm_ioctl.
313 * newname is taken from dictionary
314 *
315 * <key>cmd_data</key>
316 * <array>
317 * <string>...</string>
318 * </array>
319 */
320int
321dm_dev_rename_ioctl(prop_dictionary_t dm_dict)
322{
323 prop_array_t cmd_array;
324 dm_dev_t *dmv;
325
326 const char *name, *uuid, *n_name;
327 uint32_t flags, minor;
328
329 name = NULL;
330 uuid = NULL;
331 minor = 0;
332
333 /* Get needed values from dictionary. */
334 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
335 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
336 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
337 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
338
339 dm_dbg_print_flags(flags);
340
341 cmd_array = prop_dictionary_get(dm_dict, DM_IOCTL_CMD_DATA);
342
343 prop_array_get_cstring_nocopy(cmd_array, 0, &n_name);
344
345 if (strlen(n_name) + 1 > DM_NAME_LEN)
346 return EINVAL;
347
348 if ((dmv = dm_dev_rem(name, uuid, minor)) == NULL) {
349 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
350 return ENOENT;
351 }
352 /* change device name */
353 /*
354 * XXX How to deal with this change, name only used in
355 * dm_dev_routines, should I add dm_dev_change_name which will run
356 * under the dm_dev_list mutex ?
357 */
358 strlcpy(dmv->name, n_name, DM_NAME_LEN);
359
360 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt);
361 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
362 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid);
363
364 dm_dev_insert(dmv);
365
366 return 0;
367}
368/*
369 * Remove device from global list I have to remove active
370 * and inactive tables first.
371 */
372int
373dm_dev_remove_ioctl(prop_dictionary_t dm_dict)
374{
375 dm_dev_t *dmv;
376 const char *name, *uuid;
377 uint32_t flags, minor;
378 device_t devt;
379
380 flags = 0;
381 name = NULL;
382 uuid = NULL;
383
384 /* Get needed values from dictionary. */
385 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
386 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
387 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
388 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
389
390 dm_dbg_print_flags(flags);
391
392 /*
393 * This seems as hack to me, probably use routine dm_dev_get_devt to
394 * atomicaly get devt from device.
395 */
396 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
397 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
398 return ENOENT;
399 }
400 devt = dmv->devt;
401
402 dm_dev_unbusy(dmv);
403
404 /*
405 * This will call dm_detach routine which will actually removes
406 * device.
407 */
408 return config_detach(devt, DETACH_QUIET);
409}
410/*
411 * Return actual state of device to libdevmapper.
412 */
413int
414dm_dev_status_ioctl(prop_dictionary_t dm_dict)
415{
416 dm_dev_t *dmv;
417 const char *name, *uuid;
418 uint32_t flags, j, minor;
419
420 name = NULL;
421 uuid = NULL;
422 flags = 0;
423 j = 0;
424
425 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
426 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
427 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
428 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
429
430 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
431 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
432 return ENOENT;
433 }
434 dm_dbg_print_flags(dmv->flags);
435
436 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt);
437 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
438 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid);
439
440 if (dmv->flags & DM_SUSPEND_FLAG)
441 DM_ADD_FLAG(flags, DM_SUSPEND_FLAG);
442
443 /*
444 * Add status flags for tables I have to check both active and
445 * inactive tables.
446 */
447 if ((j = dm_table_get_target_count(&dmv->table_head, DM_TABLE_ACTIVE))) {
448 DM_ADD_FLAG(flags, DM_ACTIVE_PRESENT_FLAG);
449 } else
450 DM_REMOVE_FLAG(flags, DM_ACTIVE_PRESENT_FLAG);
451
452 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_TARGET_COUNT, j);
453
454 if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_INACTIVE))
455 DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
456 else
457 DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
458
459 dm_dev_unbusy(dmv);
460
461 return 0;
462}
463/*
464 * Set only flag to suggest that device is suspended. This call is
465 * not supported in NetBSD.
466 *
467 */
468int
469dm_dev_suspend_ioctl(prop_dictionary_t dm_dict)
470{
471 dm_dev_t *dmv;
472 const char *name, *uuid;
473 uint32_t flags, minor;
474
475 name = NULL;
476 uuid = NULL;
477 flags = 0;
478
479 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
480 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
481 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
482 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
483
484 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
485 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
486 return ENOENT;
487 }
488 atomic_or_32(&dmv->flags, DM_SUSPEND_FLAG);
489
490 dm_dbg_print_flags(dmv->flags);
491
492 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt);
493 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, dmv->flags);
494 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
495
496 dm_dev_unbusy(dmv);
497
498 /* Add flags to dictionary flag after dmv -> dict copy */
499 DM_ADD_FLAG(flags, DM_EXISTS_FLAG);
500
501 return 0;
502}
503/*
504 * Simulate Linux behaviour better and switch tables here and not in
505 * dm_table_load_ioctl.
506 */
507int
508dm_dev_resume_ioctl(prop_dictionary_t dm_dict)
509{
510 dm_dev_t *dmv;
511 const char *name, *uuid;
512 uint32_t flags, minor;
513
514 name = NULL;
515 uuid = NULL;
516 flags = 0;
517
518 /*
519 * char *xml; xml = prop_dictionary_externalize(dm_dict);
520 * printf("%s\n",xml);
521 */
522
523 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
524 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
525 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
526 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
527
528 /* Remove device from global device list */
529 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
530 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
531 return ENOENT;
532 }
533 atomic_and_32(&dmv->flags, ~(DM_SUSPEND_FLAG | DM_INACTIVE_PRESENT_FLAG));
534 atomic_or_32(&dmv->flags, DM_ACTIVE_PRESENT_FLAG);
535
536 dm_table_switch_tables(&dmv->table_head);
537
538 DM_ADD_FLAG(flags, DM_EXISTS_FLAG);
539
540 dmgetproperties(dmv->diskp, &dmv->table_head);
541
542 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt);
543 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, flags);
544 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
545
546 dm_dev_unbusy(dmv);
547
548 /* Destroy inactive table after resume. */
549 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
550
551 return 0;
552}
553/*
554 * Table management routines
555 * lvm2tools doens't send name/uuid to kernel with table
556 * for lookup I have to use minor number.
557 */
558
559/*
560 * Remove inactive table from device. Routines which work's with inactive tables
561 * doesn't need to synchronise with dmstrategy. They can synchronise themselves with mutex?.
562 *
563 */
564int
565dm_table_clear_ioctl(prop_dictionary_t dm_dict)
566{
567 dm_dev_t *dmv;
568 const char *name, *uuid;
569 uint32_t flags, minor;
570
571 dmv = NULL;
572 name = NULL;
573 uuid = NULL;
574 flags = 0;
575 minor = 0;
576
577 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
578 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
579 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
580 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
581
582 aprint_debug("Clearing inactive table from device: %s--%s\n",
583 name, uuid);
584
585 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
586 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
587 return ENOENT;
588 }
589 /* Select unused table */
590 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
591
592 atomic_and_32(&dmv->flags, ~DM_INACTIVE_PRESENT_FLAG);
593
594 dm_dev_unbusy(dmv);
595
596 return 0;
597}
598/*
599 * Get list of physical devices for active table.
600 * Get dev_t from pdev vnode and insert it into cmd_array.
601 *
602 * XXX. This function is called from lvm2tools to get information
603 * about physical devices, too e.g. during vgcreate.
604 */
605int
606dm_table_deps_ioctl(prop_dictionary_t dm_dict)
607{
608 dm_dev_t *dmv;
609 dm_table_t *tbl;
610 dm_table_entry_t *table_en;
611
612 prop_array_t cmd_array;
613 const char *name, *uuid;
614 uint32_t flags, minor;
615
616 int table_type;
617 size_t i;
618
619 name = NULL;
620 uuid = NULL;
621 dmv = NULL;
622 flags = 0;
623
624 i = 0;
625
626 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
627 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
628 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
629 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
630
631 /* create array for dev_t's */
632 cmd_array = prop_array_create();
633
634 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
635 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
636 return ENOENT;
637 }
638 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
639 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_NAME, dmv->name);
640 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid);
641
642 aprint_debug("Getting table deps for device: %s\n", dmv->name);
643
644 /*
645 * if DM_QUERY_INACTIVE_TABLE_FLAG is passed we need to query
646 * INACTIVE TABLE
647 */
648 if (flags & DM_QUERY_INACTIVE_TABLE_FLAG)
649 table_type = DM_TABLE_INACTIVE;
650 else
651 table_type = DM_TABLE_ACTIVE;
652
653 tbl = dm_table_get_entry(&dmv->table_head, table_type);
654
655 SLIST_FOREACH(table_en, tbl, next)
656 table_en->target->deps(table_en, cmd_array);
657
658 dm_table_release(&dmv->table_head, table_type);
659 dm_dev_unbusy(dmv);
660
661 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array);
662 prop_object_release(cmd_array);
663
664 return 0;
665}
666/*
667 * Load new table/tables to device.
668 * Call apropriate target init routine open all physical pdev's and
669 * link them to device. For other targets mirror, strip, snapshot
670 * etc. also add dependency devices to upcalls list.
671 *
672 * Load table to inactive slot table are switched in dm_device_resume_ioctl.
673 * This simulates Linux behaviour better there should not be any difference.
674 *
675 */
676int
677dm_table_load_ioctl(prop_dictionary_t dm_dict)
678{
679 dm_dev_t *dmv;
680 dm_table_entry_t *table_en, *last_table;
681 dm_table_t *tbl;
682 dm_target_t *target;
683
684 prop_object_iterator_t iter;
685 prop_array_t cmd_array;
686 prop_dictionary_t target_dict;
687
688 const char *name, *uuid, *type;
689
690 uint32_t flags, ret, minor;
691
692 char *str;
693
694 ret = 0;
695 flags = 0;
696 name = NULL;
697 uuid = NULL;
698 dmv = NULL;
699 last_table = NULL;
700 str = NULL;
701
702 /*
703 * char *xml; xml = prop_dictionary_externalize(dm_dict);
704 * printf("%s\n",xml);
705 */
706
707 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
708 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
709 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
710 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
711
712 cmd_array = prop_dictionary_get(dm_dict, DM_IOCTL_CMD_DATA);
713 iter = prop_array_iterator(cmd_array);
714 dm_dbg_print_flags(flags);
715
716 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
717 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
718 return ENOENT;
719 }
720 aprint_debug("Loading table to device: %s--%d\n", name,
721 dmv->table_head.cur_active_table);
722
723 /*
724 * I have to check if this table slot is not used by another table list.
725 * if it is used I should free them.
726 */
727 if (dmv->flags & DM_INACTIVE_PRESENT_FLAG)
728 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
729
730 dm_dbg_print_flags(dmv->flags);
731 tbl = dm_table_get_entry(&dmv->table_head, DM_TABLE_INACTIVE);
732
733 aprint_debug("dmv->name = %s\n", dmv->name);
734
735 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
736
737 while ((target_dict = prop_object_iterator_next(iter)) != NULL) {
738
739 prop_dictionary_get_cstring_nocopy(target_dict,
740 DM_TABLE_TYPE, &type);
741 /*
742 * If we want to deny table with 2 or more different
743 * target we should do it here
744 */
745 if (((target = dm_target_lookup(type)) == NULL) &&
746 ((target = dm_target_autoload(type)) == NULL)) {
747 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE);
748 dm_dev_unbusy(dmv);
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 return ENOMEM;
756 }
757 prop_dictionary_get_uint64(target_dict, DM_TABLE_START,
758 &table_en->start);
759 prop_dictionary_get_uint64(target_dict, DM_TABLE_LENGTH,
760 &table_en->length);
761
762 table_en->target = target;
763 table_en->dm_dev = dmv;
764 table_en->target_config = NULL;
765
766 /*
767 * There is a parameter string after dm_target_spec
768 * structure which points to /dev/wd0a 284 part of
769 * table. String str points to this text. This can be
770 * null and therefore it should be checked before we try to
771 * use it.
772 */
773 prop_dictionary_get_cstring(target_dict,
774 DM_TABLE_PARAMS, (char **) &str);
775
776 if (SLIST_EMPTY(tbl))
777 /* insert this table to head */
778 SLIST_INSERT_HEAD(tbl, table_en, next);
779 else
780 SLIST_INSERT_AFTER(last_table, table_en, next);
781
782 /*
783 * Params string is different for every target,
784 * therfore I have to pass it to target init
785 * routine and parse parameters there.
786 */
787
788 if ((ret = target->init(dmv, &table_en->target_config,
789 str)) != 0) {
790
791 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE);
792 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE);
793 free(str, M_TEMP);
794
795 dm_dev_unbusy(dmv);
796 return ret;
797 }
798 last_table = table_en;
799 free(str, M_TEMP);
800 }
801 prop_object_iterator_release(iter);
802
803 DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
804 atomic_or_32(&dmv->flags, DM_INACTIVE_PRESENT_FLAG);
805
806 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE);
807 dm_dev_unbusy(dmv);
808 return 0;
809}
810/*
811 * Get description of all tables loaded to device from kernel
812 * and send it to libdevmapper.
813 *
814 * Output dictionary for every table:
815 *
816 * <key>cmd_data</key>
817 * <array>
818 * <dict>
819 * <key>type<key>
820 * <string>...</string>
821 *
822 * <key>start</key>
823 * <integer>...</integer>
824 *
825 * <key>length</key>
826 * <integer>...</integer>
827 *
828 * <key>params</key>
829 * <string>...</string>
830 * </dict>
831 * </array>
832 *
833 */
834int
835dm_table_status_ioctl(prop_dictionary_t dm_dict)
836{
837 dm_dev_t *dmv;
838 dm_table_t *tbl;
839 dm_table_entry_t *table_en;
840
841 prop_array_t cmd_array;
842 prop_dictionary_t target_dict;
843
844 uint32_t rec_size, minor;
845
846 const char *name, *uuid;
847 char *params;
848 int flags;
849 int table_type;
850
851 dmv = NULL;
852 uuid = NULL;
853 name = NULL;
854 params = NULL;
855 flags = 0;
856 rec_size = 0;
857
858 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name);
859 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid);
860 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags);
861 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor);
862
863 cmd_array = prop_array_create();
864
865 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) {
866 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG);
867 return ENOENT;
868 }
869 /*
870 * if DM_QUERY_INACTIVE_TABLE_FLAG is passed we need to query
871 * INACTIVE TABLE
872 */
873 if (flags & DM_QUERY_INACTIVE_TABLE_FLAG)
874 table_type = DM_TABLE_INACTIVE;
875 else
876 table_type = DM_TABLE_ACTIVE;
877
878 if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_ACTIVE))
879 DM_ADD_FLAG(flags, DM_ACTIVE_PRESENT_FLAG);
880 else {
881 DM_REMOVE_FLAG(flags, DM_ACTIVE_PRESENT_FLAG);
882
883 if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_INACTIVE))
884 DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
885 else {
886 DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG);
887 }
888 }
889
890 if (dmv->flags & DM_SUSPEND_FLAG)
891 DM_ADD_FLAG(flags, DM_SUSPEND_FLAG);
892
893 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
894
895 aprint_debug("Status of device tables: %s--%d\n",
896 name, dmv->table_head.cur_active_table);
897
898 tbl = dm_table_get_entry(&dmv->table_head, table_type);
899
900 SLIST_FOREACH(table_en, tbl, next) {
901 target_dict = prop_dictionary_create();
902 aprint_debug("%016" PRIu64 ", length %016" PRIu64
903 ", target %s\n", table_en->start, table_en->length,
904 table_en->target->name);
905
906 prop_dictionary_set_uint64(target_dict, DM_TABLE_START,
907 table_en->start);
908 prop_dictionary_set_uint64(target_dict, DM_TABLE_LENGTH,
909 table_en->length);
910
911 prop_dictionary_set_cstring(target_dict, DM_TABLE_TYPE,
912 table_en->target->name);
913
914 /* dm_table_get_cur_actv.table ?? */
915 prop_dictionary_set_int32(target_dict, DM_TABLE_STAT,
916 dmv->table_head.cur_active_table);
917
918 if (flags |= DM_STATUS_TABLE_FLAG) {
919 params = table_en->target->status
920 (table_en->target_config);
921
922 if (params != NULL) {
923 prop_dictionary_set_cstring(target_dict,
924 DM_TABLE_PARAMS, params);
925
926 kmem_free(params, DM_MAX_PARAMS_SIZE);
927 }
928 }
929 prop_array_add(cmd_array, target_dict);
930 prop_object_release(target_dict);
931 }
932
933 dm_table_release(&dmv->table_head, table_type);
934 dm_dev_unbusy(dmv);
935
936 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, flags);
937 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array);
938 prop_object_release(cmd_array);
939
940 return 0;
941}
942
943
944/*
945 * For every call I have to set kernel driver version.
946 * Because I can have commands supported only in other
947 * newer/later version. This routine is called for every
948 * ioctl command.
949 */
950int
951dm_check_version(prop_dictionary_t dm_dict)
952{
953 size_t i;
954 int dm_version[3];
955 prop_array_t ver;
956
957 ver = prop_dictionary_get(dm_dict, DM_IOCTL_VERSION);
958
959 for (i = 0; i < 3; i++)
960 prop_array_get_uint32(ver, i, &dm_version[i]);
961
962 if (DM_VERSION_MAJOR != dm_version[0] || DM_VERSION_MINOR < dm_version[1]) {
963 aprint_debug("libdevmapper/kernel version mismatch "
964 "kernel: %d.%d.%d libdevmapper: %d.%d.%d\n",
965 DM_VERSION_MAJOR, DM_VERSION_MINOR, DM_VERSION_PATCHLEVEL,
966 dm_version[0], dm_version[1], dm_version[2]);
967
968 return EIO;
969 }
970 prop_array_set_uint32(ver, 0, DM_VERSION_MAJOR);
971 prop_array_set_uint32(ver, 1, DM_VERSION_MINOR);
972 prop_array_set_uint32(ver, 2, DM_VERSION_PATCHLEVEL);
973
974 prop_dictionary_set(dm_dict, DM_IOCTL_VERSION, ver);
975
976 return 0;
977}