source: mainline/uspace/lib/fdisk/src/fdisk.c@ 959b7ec

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 959b7ec was 3cdd876, checked in by Jiri Svoboda <jiri@…>, 7 years ago

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1/*
2 * Copyright (c) 2015 Jiri Svoboda
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup libfdisk
30 * @{
31 */
32/**
33 * @file Disk management library.
34 */
35
36#include <adt/list.h>
37#include <cap.h>
38#include <errno.h>
39#include <fdisk.h>
40#include <loc.h>
41#include <macros.h>
42#include <mem.h>
43#include <stdlib.h>
44#include <str.h>
45#include <vbd.h>
46#include <vol.h>
47
48static errno_t fdisk_dev_add_parts(fdisk_dev_t *);
49static void fdisk_dev_remove_parts(fdisk_dev_t *);
50static errno_t fdisk_part_spec_prepare(fdisk_dev_t *, fdisk_part_spec_t *,
51 vbd_part_spec_t *);
52static void fdisk_pri_part_insert_lists(fdisk_dev_t *, fdisk_part_t *);
53static void fdisk_log_part_insert_lists(fdisk_dev_t *, fdisk_part_t *);
54static errno_t fdisk_update_dev_info(fdisk_dev_t *);
55static uint64_t fdisk_ba_align_up(fdisk_dev_t *, uint64_t);
56static uint64_t fdisk_ba_align_down(fdisk_dev_t *, uint64_t);
57static errno_t fdisk_part_get_max_free_range(fdisk_dev_t *, fdisk_spc_t, aoff64_t *,
58 aoff64_t *);
59static void fdisk_free_range_first(fdisk_dev_t *, fdisk_spc_t, fdisk_free_range_t *);
60static bool fdisk_free_range_next(fdisk_free_range_t *);
61static bool fdisk_free_range_get(fdisk_free_range_t *, aoff64_t *, aoff64_t *);
62
63static void fdisk_dev_info_delete(fdisk_dev_info_t *info)
64{
65 if (info == NULL)
66 return;
67
68 free(info->svcname);
69 free(info);
70}
71
72errno_t fdisk_create(fdisk_t **rfdisk)
73{
74 fdisk_t *fdisk = NULL;
75 errno_t rc;
76
77 fdisk = calloc(1, sizeof(fdisk_t));
78 if (fdisk == NULL) {
79 rc = ENOMEM;
80 goto error;
81 }
82
83 rc = vol_create(&fdisk->vol);
84 if (rc != EOK) {
85 rc = EIO;
86 goto error;
87 }
88
89 rc = vbd_create(&fdisk->vbd);
90 if (rc != EOK) {
91 rc = EIO;
92 goto error;
93 }
94
95 *rfdisk = fdisk;
96 return EOK;
97error:
98 fdisk_destroy(fdisk);
99
100 return rc;
101}
102
103void fdisk_destroy(fdisk_t *fdisk)
104{
105 if (fdisk == NULL)
106 return;
107
108 vol_destroy(fdisk->vol);
109 vbd_destroy(fdisk->vbd);
110 free(fdisk);
111}
112
113errno_t fdisk_dev_list_get(fdisk_t *fdisk, fdisk_dev_list_t **rdevlist)
114{
115 fdisk_dev_list_t *devlist = NULL;
116 fdisk_dev_info_t *info;
117 service_id_t *svcs = NULL;
118 size_t count, i;
119 errno_t rc;
120
121 devlist = calloc(1, sizeof(fdisk_dev_list_t));
122 if (devlist == NULL)
123 return ENOMEM;
124
125 devlist->fdisk = fdisk;
126 list_initialize(&devlist->devinfos);
127
128 rc = vbd_get_disks(fdisk->vbd, &svcs, &count);
129 if (rc != EOK) {
130 rc = EIO;
131 goto error;
132 }
133
134 for (i = 0; i < count; i++) {
135 info = calloc(1, sizeof(fdisk_dev_info_t));
136 if (info == NULL) {
137 rc = ENOMEM;
138 goto error;
139 }
140
141 info->svcid = svcs[i];
142 info->devlist = devlist;
143 list_append(&info->ldevlist, &devlist->devinfos);
144 }
145
146 *rdevlist = devlist;
147 free(svcs);
148 return EOK;
149error:
150 free(svcs);
151 fdisk_dev_list_free(devlist);
152 return rc;
153}
154
155void fdisk_dev_list_free(fdisk_dev_list_t *devlist)
156{
157 fdisk_dev_info_t *info;
158
159 if (devlist == NULL)
160 return;
161
162 while (!list_empty(&devlist->devinfos)) {
163 info = list_get_instance(list_first(
164 &devlist->devinfos), fdisk_dev_info_t,
165 ldevlist);
166
167 list_remove(&info->ldevlist);
168 fdisk_dev_info_delete(info);
169 }
170
171 free(devlist);
172}
173
174fdisk_dev_info_t *fdisk_dev_first(fdisk_dev_list_t *devlist)
175{
176 if (list_empty(&devlist->devinfos))
177 return NULL;
178
179 return list_get_instance(list_first(&devlist->devinfos),
180 fdisk_dev_info_t, ldevlist);
181}
182
183fdisk_dev_info_t *fdisk_dev_next(fdisk_dev_info_t *devinfo)
184{
185 link_t *lnext;
186
187 lnext = list_next(&devinfo->ldevlist,
188 &devinfo->devlist->devinfos);
189 if (lnext == NULL)
190 return NULL;
191
192 return list_get_instance(lnext, fdisk_dev_info_t,
193 ldevlist);
194}
195
196void fdisk_dev_info_get_svcid(fdisk_dev_info_t *info, service_id_t *rsid)
197{
198 *rsid = info->svcid;
199}
200
201errno_t fdisk_dev_info_get_svcname(fdisk_dev_info_t *info, char **rname)
202{
203 char *name;
204 errno_t rc;
205
206 if (info->svcname == NULL) {
207 rc = loc_service_get_name(info->svcid,
208 &info->svcname);
209 if (rc != EOK)
210 return rc;
211 }
212
213 name = str_dup(info->svcname);
214 if (name == NULL)
215 return ENOMEM;
216
217 *rname = name;
218 return EOK;
219}
220
221errno_t fdisk_dev_info_capacity(fdisk_dev_info_t *info, cap_spec_t *cap)
222{
223 vbd_disk_info_t vinfo;
224 errno_t rc;
225
226 rc = vbd_disk_info(info->devlist->fdisk->vbd, info->svcid, &vinfo);
227 if (rc != EOK)
228 return EIO;
229
230 cap_from_blocks(vinfo.nblocks, vinfo.block_size, cap);
231 return EOK;
232}
233
234/** Add partition to our inventory. */
235static errno_t fdisk_part_add(fdisk_dev_t *dev, vbd_part_id_t partid,
236 fdisk_part_t **rpart)
237{
238 fdisk_part_t *part;
239 vbd_part_info_t pinfo;
240 vol_part_info_t vpinfo;
241 errno_t rc;
242
243 part = calloc(1, sizeof(fdisk_part_t));
244 if (part == NULL)
245 return ENOMEM;
246
247 rc = vbd_part_get_info(dev->fdisk->vbd, partid, &pinfo);
248 if (rc != EOK) {
249 rc = EIO;
250 goto error;
251 }
252
253 if (pinfo.svc_id != 0) {
254 /*
255 * Normally vol service discovers the partition asynchronously.
256 * Here we need to make sure the partition is already known to it.
257 */
258 rc = vol_part_add(dev->fdisk->vol, pinfo.svc_id);
259 if (rc != EOK && rc != EEXIST) {
260 rc = EIO;
261 goto error;
262 }
263
264 rc = vol_part_info(dev->fdisk->vol, pinfo.svc_id, &vpinfo);
265 if (rc != EOK) {
266 rc = EIO;
267 goto error;
268 }
269
270 part->pcnt = vpinfo.pcnt;
271 part->fstype = vpinfo.fstype;
272 part->label = str_dup(vpinfo.label);
273 }
274
275 part->dev = dev;
276 part->index = pinfo.index;
277 part->block0 = pinfo.block0;
278 part->nblocks = pinfo.nblocks;
279 part->pkind = pinfo.pkind;
280 part->svc_id = pinfo.svc_id;
281
282 switch (part->pkind) {
283 case lpk_primary:
284 case lpk_extended:
285 fdisk_pri_part_insert_lists(dev, part);
286 break;
287 case lpk_logical:
288 fdisk_log_part_insert_lists(dev, part);
289 break;
290 }
291
292 list_append(&part->lparts, &dev->parts);
293
294 if (part->pkind == lpk_extended)
295 dev->ext_part = part;
296
297 cap_from_blocks(part->nblocks, dev->dinfo.block_size,
298 &part->capacity);
299 part->part_id = partid;
300
301 if (rpart != NULL)
302 *rpart = part;
303 return EOK;
304error:
305 if (part != NULL)
306 free(part->label);
307 free(part);
308 return rc;
309}
310
311/** Remove partition from our inventory. */
312static void fdisk_part_remove(fdisk_part_t *part)
313{
314 list_remove(&part->lparts);
315 if (link_used(&part->lpri_ba))
316 list_remove(&part->lpri_ba);
317 if (link_used(&part->lpri_idx))
318 list_remove(&part->lpri_idx);
319 if (link_used(&part->llog_ba))
320 list_remove(&part->llog_ba);
321
322 free(part->label);
323 free(part);
324}
325
326static void fdisk_pri_part_insert_lists(fdisk_dev_t *dev, fdisk_part_t *part)
327{
328 link_t *link;
329 fdisk_part_t *p;
330
331 /* Insert to list by block address */
332 link = list_first(&dev->pri_ba);
333 while (link != NULL) {
334 p = list_get_instance(link, fdisk_part_t, lpri_ba);
335 if (p->block0 > part->block0) {
336 list_insert_before(&part->lpri_ba, &p->lpri_ba);
337 break;
338 }
339
340 link = list_next(link, &dev->pri_ba);
341 }
342
343 if (link == NULL)
344 list_append(&part->lpri_ba, &dev->pri_ba);
345
346 /* Insert to list by index */
347 link = list_first(&dev->pri_idx);
348 while (link != NULL) {
349 p = list_get_instance(link, fdisk_part_t, lpri_idx);
350 if (p->index > part->index) {
351 list_insert_before(&part->lpri_idx, &p->lpri_idx);
352 break;
353 }
354
355 link = list_next(link, &dev->pri_idx);
356 }
357
358 if (link == NULL)
359 list_append(&part->lpri_idx, &dev->pri_idx);
360}
361
362static void fdisk_log_part_insert_lists(fdisk_dev_t *dev, fdisk_part_t *part)
363{
364 link_t *link;
365 fdisk_part_t *p;
366
367 /* Insert to list by block address */
368 link = list_first(&dev->log_ba);
369 while (link != NULL) {
370 p = list_get_instance(link, fdisk_part_t, llog_ba);
371 if (p->block0 > part->block0) {
372 list_insert_before(&part->llog_ba, &p->llog_ba);
373 break;
374 }
375
376 link = list_next(link, &dev->log_ba);
377 }
378
379 if (link == NULL)
380 list_append(&part->llog_ba, &dev->log_ba);
381}
382
383static errno_t fdisk_dev_add_parts(fdisk_dev_t *dev)
384{
385 service_id_t *psids = NULL;
386 size_t nparts, i;
387 errno_t rc;
388
389 rc = fdisk_update_dev_info(dev);
390 if (rc != EOK) {
391 rc = EIO;
392 goto error;
393 }
394
395 rc = vbd_label_get_parts(dev->fdisk->vbd, dev->sid, &psids, &nparts);
396 if (rc != EOK) {
397 rc = EIO;
398 goto error;
399 }
400
401 for (i = 0; i < nparts; i++) {
402 rc = fdisk_part_add(dev, psids[i], NULL);
403 if (rc != EOK) {
404 goto error;
405 }
406 }
407
408 free(psids);
409 return EOK;
410error:
411 fdisk_dev_remove_parts(dev);
412 return rc;
413}
414
415static void fdisk_dev_remove_parts(fdisk_dev_t *dev)
416{
417 fdisk_part_t *part;
418
419 part = fdisk_part_first(dev);
420 while (part != NULL) {
421 fdisk_part_remove(part);
422 part = fdisk_part_first(dev);
423 }
424}
425
426errno_t fdisk_dev_open(fdisk_t *fdisk, service_id_t sid, fdisk_dev_t **rdev)
427{
428 fdisk_dev_t *dev = NULL;
429 service_id_t *psids = NULL;
430 size_t nparts, i;
431 errno_t rc;
432
433 dev = calloc(1, sizeof(fdisk_dev_t));
434 if (dev == NULL)
435 return ENOMEM;
436
437 dev->fdisk = fdisk;
438 dev->sid = sid;
439 list_initialize(&dev->parts);
440 list_initialize(&dev->pri_idx);
441 list_initialize(&dev->pri_ba);
442 list_initialize(&dev->log_ba);
443
444 rc = fdisk_update_dev_info(dev);
445 if (rc != EOK) {
446 rc = EIO;
447 goto error;
448 }
449
450 rc = vbd_label_get_parts(fdisk->vbd, sid, &psids, &nparts);
451 if (rc != EOK) {
452 rc = EIO;
453 goto error;
454 }
455
456 for (i = 0; i < nparts; i++) {
457 rc = fdisk_part_add(dev, psids[i], NULL);
458 if (rc != EOK) {
459 goto error;
460 }
461 }
462
463 free(psids);
464 *rdev = dev;
465 return EOK;
466error:
467 fdisk_dev_close(dev);
468 return rc;
469}
470
471void fdisk_dev_close(fdisk_dev_t *dev)
472{
473 if (dev == NULL)
474 return;
475
476 fdisk_dev_remove_parts(dev);
477 free(dev);
478}
479
480/** Erase contents of unlabeled disk. */
481errno_t fdisk_dev_erase(fdisk_dev_t *dev)
482{
483 fdisk_part_t *part;
484 errno_t rc;
485
486 if (dev->dinfo.ltype != lt_none)
487 return EINVAL;
488
489 part = fdisk_part_first(dev);
490 assert(part != NULL);
491 if (part->pcnt == vpc_empty)
492 return EINVAL;
493
494 rc = vol_part_empty(dev->fdisk->vol, part->svc_id);
495 if (rc != EOK) {
496 return rc;
497 }
498
499 part->pcnt = vpc_empty;
500 return EOK;
501}
502
503void fdisk_dev_get_flags(fdisk_dev_t *dev, fdisk_dev_flags_t *rflags)
504{
505 fdisk_dev_flags_t flags;
506 fdisk_part_t *part;
507
508 flags = 0;
509
510 /* fdf_can_create_label */
511 if (dev->dinfo.ltype == lt_none) {
512 part = fdisk_part_first(dev);
513 assert(part != NULL);
514 if (part->pcnt == vpc_empty)
515 flags |= fdf_can_create_label;
516 else
517 flags |= fdf_can_erase_dev;
518 } else {
519 flags |= fdf_can_delete_label;
520 }
521
522 *rflags = flags;
523}
524
525errno_t fdisk_dev_get_svcname(fdisk_dev_t *dev, char **rname)
526{
527 char *name;
528 errno_t rc;
529
530 rc = loc_service_get_name(dev->sid, &name);
531 if (rc != EOK)
532 return rc;
533
534 *rname = name;
535 return EOK;
536}
537
538errno_t fdisk_dev_capacity(fdisk_dev_t *dev, cap_spec_t *cap)
539{
540 cap_from_blocks(dev->dinfo.nblocks, dev->dinfo.block_size, cap);
541 return EOK;
542}
543
544errno_t fdisk_label_get_info(fdisk_dev_t *dev, fdisk_label_info_t *info)
545{
546 vbd_disk_info_t vinfo;
547 uint64_t b0, nb;
548 uint64_t hdrb;
549 errno_t rc;
550
551 rc = vbd_disk_info(dev->fdisk->vbd, dev->sid, &vinfo);
552 if (rc != EOK) {
553 rc = EIO;
554 goto error;
555 }
556
557 info->ltype = vinfo.ltype;
558 info->flags = vinfo.flags;
559
560 if ((info->flags & lf_can_create_pri) != 0 ||
561 (info->flags & lf_can_create_ext) != 0) {
562 /* Verify there is enough space to create partition */
563
564 rc = fdisk_part_get_max_free_range(dev, spc_pri, &b0, &nb);
565 if (rc != EOK)
566 info->flags &= ~(lf_can_create_pri | lf_can_create_ext);
567 }
568
569 if ((info->flags & lf_can_create_log) != 0) {
570 /* Verify there is enough space to create logical partition */
571 hdrb = max(1, dev->align);
572 rc = fdisk_part_get_max_free_range(dev, spc_log, &b0, &nb);
573 if (rc != EOK || nb <= hdrb)
574 info->flags &= ~lf_can_create_log;
575 }
576
577 return EOK;
578error:
579 return rc;
580}
581
582errno_t fdisk_label_create(fdisk_dev_t *dev, label_type_t ltype)
583{
584 fdisk_part_t *part;
585 errno_t rc;
586
587 /* Disk must not contain a label. */
588 if (dev->dinfo.ltype != lt_none)
589 return EEXIST;
590
591 /* Dummy partition spanning entire disk must be considered empty */
592 part = fdisk_part_first(dev);
593 assert(part != NULL);
594 if (part->pcnt != vpc_empty)
595 return EEXIST;
596
597 /* Remove dummy partition */
598 fdisk_dev_remove_parts(dev);
599
600 rc = vbd_label_create(dev->fdisk->vbd, dev->sid, ltype);
601 if (rc != EOK) {
602 /* Re-add dummy partition */
603 (void) fdisk_dev_add_parts(dev);
604 return rc;
605 }
606
607 rc = fdisk_update_dev_info(dev);
608 if (rc != EOK)
609 return rc;
610
611 return EOK;
612}
613
614errno_t fdisk_label_destroy(fdisk_dev_t *dev)
615{
616 fdisk_part_t *part;
617 fdisk_dev_flags_t dflags;
618 errno_t rc;
619
620 part = fdisk_part_first(dev);
621 while (part != NULL) {
622 rc = fdisk_part_destroy(part);
623 if (rc != EOK)
624 return EIO;
625 part = fdisk_part_first(dev);
626 }
627
628 rc = vbd_label_delete(dev->fdisk->vbd, dev->sid);
629 if (rc != EOK)
630 return EIO;
631
632 rc = fdisk_dev_add_parts(dev);
633 if (rc != EOK)
634 return rc;
635
636 /* Make sure device is considered empty */
637 fdisk_dev_get_flags(dev, &dflags);
638 if ((dflags & fdf_can_erase_dev) != 0) {
639 rc = fdisk_dev_erase(dev);
640 if (rc != EOK)
641 return rc;
642 }
643
644 return EOK;
645}
646
647fdisk_part_t *fdisk_part_first(fdisk_dev_t *dev)
648{
649 link_t *link;
650
651 link = list_first(&dev->parts);
652 if (link == NULL)
653 return NULL;
654
655 return list_get_instance(link, fdisk_part_t, lparts);
656}
657
658fdisk_part_t *fdisk_part_next(fdisk_part_t *part)
659{
660 link_t *link;
661
662 link = list_next(&part->lparts, &part->dev->parts);
663 if (link == NULL)
664 return NULL;
665
666 return list_get_instance(link, fdisk_part_t, lparts);
667}
668
669errno_t fdisk_part_get_info(fdisk_part_t *part, fdisk_part_info_t *info)
670{
671 info->capacity = part->capacity;
672 info->pcnt = part->pcnt;
673 info->fstype = part->fstype;
674 info->pkind = part->pkind;
675 info->label = part->label;
676 info->svc_id = part->svc_id;
677 return EOK;
678}
679
680/** Get size of largest free block. */
681errno_t fdisk_part_get_max_avail(fdisk_dev_t *dev, fdisk_spc_t spc, cap_spec_t *cap)
682{
683 errno_t rc;
684 uint64_t b0;
685 uint64_t nb;
686 aoff64_t hdrb;
687
688 rc = fdisk_part_get_max_free_range(dev, spc, &b0, &nb);
689 if (rc != EOK)
690 return rc;
691
692 /* For logical partitions we need to subtract header size */
693 if (spc == spc_log) {
694 hdrb = max(1, dev->align);
695 if (nb <= hdrb)
696 return ENOSPC;
697 nb -= hdrb;
698 }
699
700 cap_from_blocks(nb, dev->dinfo.block_size, cap);
701 return EOK;
702}
703
704/** Get total free space capacity. */
705errno_t fdisk_part_get_tot_avail(fdisk_dev_t *dev, fdisk_spc_t spc,
706 cap_spec_t *cap)
707{
708 fdisk_free_range_t fr;
709 uint64_t hdrb;
710 uint64_t b0;
711 uint64_t nb;
712 uint64_t totb;
713
714 if (spc == spc_log)
715 hdrb = max(1, dev->align);
716 else
717 hdrb = 0;
718
719 totb = 0;
720 fdisk_free_range_first(dev, spc, &fr);
721 do {
722 if (fdisk_free_range_get(&fr, &b0, &nb)) {
723 if (nb > hdrb)
724 totb += nb - hdrb;
725 }
726 } while (fdisk_free_range_next(&fr));
727
728 cap_from_blocks(totb, dev->dinfo.block_size, cap);
729 return EOK;
730}
731
732/** Create partition.
733 *
734 * Create new partition based on a specification.
735 *
736 * @param dev Fdisk device
737 * @param pspec Partition specification
738 * @param rpart Place to store pointer to new partition
739 *
740 * @return EOK on success or error code
741 */
742errno_t fdisk_part_create(fdisk_dev_t *dev, fdisk_part_spec_t *pspec,
743 fdisk_part_t **rpart)
744{
745 fdisk_part_t *part = NULL;
746 vbd_part_spec_t vpspec;
747 vbd_part_id_t partid = 0;
748 vol_part_info_t vpinfo;
749 const char *label;
750 const char *mountp;
751 errno_t rc;
752
753 label = pspec->label != NULL ? pspec->label : "";
754 mountp = pspec->mountp != NULL ? pspec->mountp : "";
755
756 rc = fdisk_part_spec_prepare(dev, pspec, &vpspec);
757 if (rc != EOK) {
758 rc = EIO;
759 goto error;
760 }
761
762 rc = vbd_part_create(dev->fdisk->vbd, dev->sid, &vpspec, &partid);
763 if (rc != EOK) {
764 rc = EIO;
765 goto error;
766 }
767
768 rc = fdisk_part_add(dev, partid, &part);
769 if (rc != EOK) {
770 rc = EIO;
771 goto error;
772 }
773
774 if (part->svc_id != 0) {
775 rc = vol_part_mkfs(dev->fdisk->vol, part->svc_id, pspec->fstype,
776 label, mountp);
777 if (rc != EOK && rc != ENOTSUP) {
778 rc = EIO;
779 goto error;
780 }
781
782 /* Get the real label value */
783 rc = vol_part_info(dev->fdisk->vol, part->svc_id, &vpinfo);
784 if (rc != EOK) {
785 rc = EIO;
786 goto error;
787 }
788
789 part->pcnt = vpinfo.pcnt;
790 part->fstype = vpinfo.fstype;
791 part->label = str_dup(vpinfo.label);
792
793 if (part->label == NULL) {
794 rc = EIO;
795 goto error;
796 }
797 }
798
799 if (rpart != NULL)
800 *rpart = part;
801 return EOK;
802error:
803 /* Try rolling back */
804 if (part != NULL)
805 fdisk_part_remove(part);
806 if (partid != 0)
807 (void) vbd_part_delete(dev->fdisk->vbd, partid);
808 return rc;
809}
810
811errno_t fdisk_part_destroy(fdisk_part_t *part)
812{
813 errno_t rc;
814
815 rc = vbd_part_delete(part->dev->fdisk->vbd, part->part_id);
816 if (rc != EOK)
817 return EIO;
818
819 fdisk_part_remove(part);
820 return EOK;
821}
822
823/** Set partition mount point.
824 *
825 * @param part Fdisk partition
826 * @param mountp Mount point
827 *
828 * @return EOK on success or error code
829 */
830errno_t fdisk_part_set_mountp(fdisk_part_t *part, const char *mountp)
831{
832 return vol_part_set_mountp(part->dev->fdisk->vol,
833 part->svc_id, mountp);
834}
835
836void fdisk_pspec_init(fdisk_part_spec_t *pspec)
837{
838 memset(pspec, 0, sizeof(fdisk_part_spec_t));
839}
840
841/** Get free partition index. */
842static errno_t fdisk_part_get_free_idx(fdisk_dev_t *dev, int *rindex)
843{
844 link_t *link;
845 fdisk_part_t *part;
846 int nidx;
847
848 link = list_first(&dev->pri_idx);
849 nidx = 1;
850 while (link != NULL) {
851 part = list_get_instance(link, fdisk_part_t, lpri_idx);
852 if (part->index > nidx)
853 break;
854 nidx = part->index + 1;
855 link = list_next(link, &dev->pri_idx);
856 }
857
858 if (nidx > 4 /* XXXX actual number of slots*/) {
859 return ELIMIT;
860 }
861
862 *rindex = nidx;
863 return EOK;
864}
865
866/** Get free range of blocks.
867 *
868 * Get free range of blocks of at least the specified size (first fit).
869 */
870static errno_t fdisk_part_get_free_range(fdisk_dev_t *dev, aoff64_t nblocks,
871 fdisk_spc_t spc, aoff64_t *rblock0, aoff64_t *rnblocks)
872{
873 fdisk_free_range_t fr;
874 uint64_t b0;
875 uint64_t nb;
876
877 fdisk_free_range_first(dev, spc, &fr);
878 do {
879 if (fdisk_free_range_get(&fr, &b0, &nb)) {
880 if (nb >= nblocks) {
881 *rblock0 = b0;
882 *rnblocks = nb;
883 return EOK;
884 }
885 }
886 } while (fdisk_free_range_next(&fr));
887
888 /* No conforming free range found */
889 return ENOSPC;
890}
891
892/** Get largest free range of blocks.
893 *
894 * Get free range of blocks of the maximum size.
895 */
896static errno_t fdisk_part_get_max_free_range(fdisk_dev_t *dev, fdisk_spc_t spc,
897 aoff64_t *rblock0, aoff64_t *rnblocks)
898{
899 fdisk_free_range_t fr;
900 uint64_t b0;
901 uint64_t nb;
902 uint64_t best_b0;
903 uint64_t best_nb;
904
905 best_b0 = best_nb = 0;
906 fdisk_free_range_first(dev, spc, &fr);
907 do {
908 if (fdisk_free_range_get(&fr, &b0, &nb)) {
909 if (nb > best_nb) {
910 best_b0 = b0;
911 best_nb = nb;
912 }
913 }
914 } while (fdisk_free_range_next(&fr));
915
916 if (best_nb == 0)
917 return ENOSPC;
918
919 *rblock0 = best_b0;
920 *rnblocks = best_nb;
921 return EOK;
922}
923
924/** Prepare new partition specification for VBD. */
925static errno_t fdisk_part_spec_prepare(fdisk_dev_t *dev, fdisk_part_spec_t *pspec,
926 vbd_part_spec_t *vpspec)
927{
928 aoff64_t nom_blocks;
929 aoff64_t min_blocks;
930 aoff64_t max_blocks;
931 aoff64_t act_blocks;
932 aoff64_t fblock0;
933 aoff64_t fnblocks;
934 aoff64_t hdrb;
935 label_pcnt_t pcnt;
936 fdisk_spc_t spc;
937 int index;
938 errno_t rc;
939
940 rc = cap_to_blocks(&pspec->capacity, cv_nom, dev->dinfo.block_size,
941 &nom_blocks);
942 if (rc != EOK)
943 return rc;
944
945 rc = cap_to_blocks(&pspec->capacity, cv_min, dev->dinfo.block_size,
946 &min_blocks);
947 if (rc != EOK)
948 return rc;
949
950 rc = cap_to_blocks(&pspec->capacity, cv_max, dev->dinfo.block_size,
951 &max_blocks);
952 if (rc != EOK)
953 return rc;
954
955 nom_blocks = fdisk_ba_align_up(dev, nom_blocks);
956 min_blocks = fdisk_ba_align_up(dev, min_blocks);
957 max_blocks = fdisk_ba_align_up(dev, max_blocks);
958
959 pcnt = LPC_LIMIT;
960
961 switch (pspec->fstype) {
962 case fs_exfat:
963 pcnt = lpc_exfat;
964 break;
965 case fs_fat:
966 pcnt = lpc_fat32; /* XXX Detect FAT12/16 vs FAT32 */
967 break;
968 case fs_minix:
969 pcnt = lpc_minix;
970 break;
971 case fs_ext4:
972 pcnt = lpc_ext4;
973 break;
974 case fs_cdfs:
975 return EINVAL; /* You cannot create an ISO partition */
976 }
977
978 if (pcnt == LPC_LIMIT)
979 return EINVAL;
980
981 if (pspec->pkind == lpk_logical) {
982 hdrb = max(1, dev->align);
983 spc = spc_log;
984 } else {
985 hdrb = 0;
986 spc = spc_pri;
987 }
988
989 rc = fdisk_part_get_free_range(dev, hdrb + nom_blocks, spc,
990 &fblock0, &fnblocks);
991
992 if (rc == EOK) {
993 /*
994 * If the size of the free range would still give the same capacity
995 * when rounded, allocate entire range. Otherwise allocate exactly
996 * what we were asked for.
997 */
998 if (fnblocks <= max_blocks) {
999 act_blocks = fnblocks;
1000 } else {
1001 act_blocks = hdrb + nom_blocks;
1002 }
1003 } else {
1004 assert(rc == ENOSPC);
1005
1006 /*
1007 * There is no free range that can contain exactly the requested
1008 * capacity. Try to allocate at least such number of blocks
1009 * that would still fullfill the request within the limits
1010 * of the precision with witch the capacity was specified
1011 * (i.e. when rounded up).
1012 */
1013 rc = fdisk_part_get_free_range(dev, hdrb + min_blocks, spc,
1014 &fblock0, &fnblocks);
1015 if (rc != EOK)
1016 return rc;
1017
1018 assert(fnblocks < hdrb + nom_blocks);
1019 act_blocks = fnblocks;
1020 }
1021
1022 if (pspec->pkind != lpk_logical) {
1023 rc = fdisk_part_get_free_idx(dev, &index);
1024 if (rc != EOK)
1025 return EIO;
1026 } else {
1027 index = 0;
1028 }
1029
1030 memset(vpspec, 0, sizeof(vbd_part_spec_t));
1031 vpspec->index = index;
1032 vpspec->hdr_blocks = hdrb;
1033 vpspec->block0 = fblock0 + hdrb;
1034 vpspec->nblocks = act_blocks - hdrb;
1035 vpspec->pkind = pspec->pkind;
1036
1037 if (pspec->pkind != lpk_extended) {
1038 rc = vbd_suggest_ptype(dev->fdisk->vbd, dev->sid, pcnt,
1039 &vpspec->ptype);
1040 if (rc != EOK)
1041 return EIO;
1042 }
1043
1044 return EOK;
1045}
1046
1047static errno_t fdisk_update_dev_info(fdisk_dev_t *dev)
1048{
1049 errno_t rc;
1050 size_t align_bytes;
1051 uint64_t avail_cap;
1052
1053 rc = vbd_disk_info(dev->fdisk->vbd, dev->sid, &dev->dinfo);
1054 if (rc != EOK)
1055 return EIO;
1056
1057 /* Capacity available for partition in bytes */
1058 avail_cap = dev->dinfo.anblocks * dev->dinfo.block_size;
1059
1060 /* Determine optimum alignment */
1061 align_bytes = 1024 * 1024; /* 1 MiB */
1062 while (align_bytes > 1 && avail_cap / align_bytes < 256) {
1063 align_bytes = align_bytes / 16;
1064 }
1065
1066 dev->align = align_bytes / dev->dinfo.block_size;
1067 if (dev->align < 1)
1068 dev->align = 1;
1069 return EOK;
1070}
1071
1072static uint64_t fdisk_ba_align_up(fdisk_dev_t *dev, uint64_t ba)
1073{
1074 return ((ba + dev->align - 1) / dev->align) * dev->align;
1075}
1076
1077static uint64_t fdisk_ba_align_down(fdisk_dev_t *dev, uint64_t ba)
1078{
1079 return ba - (ba % dev->align);
1080}
1081
1082static void fdisk_free_range_first(fdisk_dev_t *dev, fdisk_spc_t spc,
1083 fdisk_free_range_t *fr)
1084{
1085 link_t *link;
1086
1087 fr->dev = dev;
1088 fr->spc = spc;
1089
1090 if (fr->spc == spc_pri) {
1091 /* Primary partitions */
1092 fr->b0 = fdisk_ba_align_up(fr->dev, fr->dev->dinfo.ablock0);
1093
1094 link = list_first(&dev->pri_ba);
1095 if (link != NULL)
1096 fr->npart = list_get_instance(link, fdisk_part_t, lpri_ba);
1097 else
1098 fr->npart = NULL;
1099 } else { /* fr->spc == spc_log */
1100 /* Logical partitions */
1101 fr->b0 = fdisk_ba_align_up(fr->dev, fr->dev->ext_part->block0);
1102
1103 link = list_first(&dev->log_ba);
1104 if (link != NULL)
1105 fr->npart = list_get_instance(link, fdisk_part_t, llog_ba);
1106 else
1107 fr->npart = NULL;
1108 }
1109}
1110
1111static bool fdisk_free_range_next(fdisk_free_range_t *fr)
1112{
1113 link_t *link;
1114
1115 if (fr->npart == NULL)
1116 return false;
1117
1118 fr->b0 = fdisk_ba_align_up(fr->dev, fr->npart->block0 +
1119 fr->npart->nblocks);
1120
1121 if (fr->spc == spc_pri) {
1122 /* Primary partitions */
1123 link = list_next(&fr->npart->lpri_ba, &fr->dev->pri_ba);
1124 if (link != NULL)
1125 fr->npart = list_get_instance(link, fdisk_part_t, lpri_ba);
1126 else
1127 fr->npart = NULL;
1128 } else { /* fr->spc == spc_log */
1129 /* Logical partitions */
1130 link = list_next(&fr->npart->llog_ba, &fr->dev->log_ba);
1131 if (link != NULL)
1132 fr->npart = list_get_instance(link, fdisk_part_t, llog_ba);
1133 else
1134 fr->npart = NULL;
1135 }
1136
1137 return true;
1138}
1139
1140static bool fdisk_free_range_get(fdisk_free_range_t *fr,
1141 aoff64_t *b0, aoff64_t *nb)
1142{
1143 aoff64_t b1;
1144
1145 if (fr->npart != NULL) {
1146 b1 = fdisk_ba_align_down(fr->dev, fr->npart->block0);
1147 } else {
1148 if (fr->spc == spc_pri) {
1149 b1 = fdisk_ba_align_down(fr->dev,
1150 fr->dev->dinfo.ablock0 + fr->dev->dinfo.anblocks);
1151 } else { /* fr->spc == spc_log */
1152 b1 = fdisk_ba_align_down(fr->dev,
1153 fr->dev->ext_part->block0 + fr->dev->ext_part->nblocks);
1154 }
1155 }
1156
1157 if (b1 < fr->b0)
1158 return false;
1159
1160 *b0 = fr->b0;
1161 *nb = b1 - fr->b0;
1162
1163 return true;
1164}
1165
1166/** Get volume label support. */
1167errno_t fdisk_get_vollabel_support(fdisk_dev_t *dev, vol_fstype_t fstype,
1168 vol_label_supp_t *vlsupp)
1169{
1170 return vol_part_get_lsupp(dev->fdisk->vol, fstype, vlsupp);
1171}
1172
1173/** @}
1174 */
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