2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2008 Andrew Thompson <thompsa@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/ctype.h>
33 #include <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/limits.h>
37 #include <sys/malloc.h>
38 #include <sys/queue.h>
39 #include <sys/sysctl.h>
40 #include <sys/systm.h>
42 #include <geom/geom.h>
43 #include <sys/endian.h>
45 #include <geom/linux_lvm/g_linux_lvm.h>
47 FEATURE(geom_linux_lvm, "GEOM Linux LVM partitioning support");
49 /* Declare malloc(9) label */
50 static MALLOC_DEFINE(M_GLLVM, "gllvm", "GEOM_LINUX_LVM Data");
52 /* GEOM class methods */
53 static g_access_t g_llvm_access;
54 static g_init_t g_llvm_init;
55 static g_orphan_t g_llvm_orphan;
56 static g_orphan_t g_llvm_taste_orphan;
57 static g_start_t g_llvm_start;
58 static g_taste_t g_llvm_taste;
59 static g_ctl_destroy_geom_t g_llvm_destroy_geom;
61 static void g_llvm_done(struct bio *);
62 static void g_llvm_remove_disk(struct g_llvm_vg *, struct g_consumer *);
63 static int g_llvm_activate_lv(struct g_llvm_vg *, struct g_llvm_lv *);
64 static int g_llvm_add_disk(struct g_llvm_vg *, struct g_provider *, char *);
65 static void g_llvm_free_vg(struct g_llvm_vg *);
66 static int g_llvm_destroy(struct g_llvm_vg *, int);
67 static int g_llvm_read_label(struct g_consumer *, struct g_llvm_label *);
68 static int g_llvm_read_md(struct g_consumer *, struct g_llvm_metadata *,
69 struct g_llvm_label *);
71 static int llvm_label_decode(const u_char *, struct g_llvm_label *, int);
72 static int llvm_md_decode(const u_char *, struct g_llvm_metadata *,
73 struct g_llvm_label *);
74 static int llvm_textconf_decode(u_char *, int,
75 struct g_llvm_metadata *);
76 static int llvm_textconf_decode_pv(char **, char *, struct g_llvm_vg *);
77 static int llvm_textconf_decode_lv(char **, char *, struct g_llvm_vg *);
78 static int llvm_textconf_decode_sg(char **, char *, struct g_llvm_lv *);
80 SYSCTL_DECL(_kern_geom);
81 SYSCTL_NODE(_kern_geom, OID_AUTO, linux_lvm, CTLFLAG_RW, 0,
82 "GEOM_LINUX_LVM stuff");
83 static u_int g_llvm_debug = 0;
84 SYSCTL_UINT(_kern_geom_linux_lvm, OID_AUTO, debug, CTLFLAG_RWTUN, &g_llvm_debug, 0,
87 LIST_HEAD(, g_llvm_vg) vg_list;
90 * Called to notify geom when it's been opened, and for what intent
93 g_llvm_access(struct g_provider *pp, int dr, int dw, int de)
100 KASSERT(pp != NULL, ("%s: NULL provider", __func__));
102 KASSERT(gp != NULL, ("%s: NULL geom", __func__));
106 /* It seems that .access can be called with negative dr,dw,dx
107 * in this case but I want to check for myself */
108 G_LLVM_DEBUG(0, "access(%d, %d, %d) for %s",
109 dr, dw, de, pp->name);
111 /* This should only happen when geom is withered so
112 * allow only negative requests */
113 KASSERT(dr <= 0 && dw <= 0 && de <= 0,
114 ("%s: Positive access for %s", __func__, pp->name));
115 if (pp->acr + dr == 0 && pp->acw + dw == 0 && pp->ace + de == 0)
117 "Device %s definitely destroyed", pp->name);
121 /* Grab an exclusive bit to propagate on our consumers on first open */
122 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)
124 /* ... drop it on close */
125 if (pp->acr + dr == 0 && pp->acw + dw == 0 && pp->ace + de == 0)
129 LIST_FOREACH(c, &gp->consumer, consumer) {
130 KASSERT(c != NULL, ("%s: consumer is NULL", __func__));
131 error = g_access(c, dr, dw, de);
133 struct g_consumer *c2;
135 /* Backout earlier changes */
136 LIST_FOREACH(c2, &gp->consumer, consumer) {
137 if (c2 == c) /* all eariler components fixed */
139 g_access(c2, -dr, -dw, -de);
148 * Dismantle bio_queue and destroy its components
151 bioq_dismantle(struct bio_queue_head *bq)
155 for (b = bioq_first(bq); b != NULL; b = bioq_first(bq)) {
163 * Can't use standard handler because one requested IO may
164 * fork into additional data IOs
167 g_llvm_done(struct bio *b)
169 struct bio *parent_b;
171 parent_b = b->bio_parent;
173 if (b->bio_error != 0) {
174 G_LLVM_DEBUG(0, "Error %d for offset=%ju, length=%ju on %s",
175 b->bio_error, b->bio_offset, b->bio_length,
177 if (parent_b->bio_error == 0)
178 parent_b->bio_error = b->bio_error;
181 parent_b->bio_inbed++;
182 parent_b->bio_completed += b->bio_completed;
184 if (parent_b->bio_children == parent_b->bio_inbed) {
185 parent_b->bio_completed = parent_b->bio_length;
186 g_io_deliver(parent_b, parent_b->bio_error);
192 g_llvm_start(struct bio *bp)
194 struct g_provider *pp;
195 struct g_llvm_vg *vg;
196 struct g_llvm_pv *pv;
197 struct g_llvm_lv *lv;
198 struct g_llvm_segment *sg;
200 struct bio_queue_head bq;
202 off_t offset, length;
208 vg = pp->geom->softc;
210 switch (bp->bio_cmd) {
214 /* XXX BIO_GETATTR allowed? */
217 g_io_deliver(bp, EOPNOTSUPP);
223 chunk_size = vg->vg_extentsize;
225 offset = bp->bio_offset; /* virtual offset and length */
226 length = bp->bio_length;
229 size_t chunk_index, in_chunk_offset, in_chunk_length;
232 cb = g_clone_bio(bp);
235 if (bp->bio_error == 0)
236 bp->bio_error = ENOMEM;
237 g_io_deliver(bp, bp->bio_error);
241 /* get the segment and the pv */
242 if (lv->lv_sgcount == 1) {
243 /* skip much of the calculations for a single sg */
246 in_chunk_length = length;
249 cb->bio_offset = offset + sg->sg_pvoffset;
251 chunk_index = offset / chunk_size; /* round downwards */
252 in_chunk_offset = offset % chunk_size;
254 min(length, chunk_size - in_chunk_offset);
256 /* XXX could be faster */
257 LIST_FOREACH(sg, &lv->lv_segs, sg_next) {
258 if (chunk_index >= sg->sg_start &&
259 chunk_index <= sg->sg_end) {
260 /* adjust chunk index for sg start */
261 chunk_index -= sg->sg_start;
267 (off_t)chunk_index * (off_t)chunk_size
268 + in_chunk_offset + sg->sg_pvoffset;
271 KASSERT(pv != NULL, ("Can't find PV for chunk %zu",
274 cb->bio_to = pv->pv_gprov;
275 cb->bio_done = g_llvm_done;
276 cb->bio_length = in_chunk_length;
278 cb->bio_caller1 = pv;
279 bioq_disksort(&bq, cb);
282 "Mapped %s(%ju, %ju) on %s to %zu(%zu,%zu) @ %s:%ju",
283 bp->bio_cmd == BIO_READ ? "R" : "W",
284 offset, length, lv->lv_name,
285 chunk_index, in_chunk_offset, in_chunk_length,
286 pv->pv_name, cb->bio_offset);
288 addr += in_chunk_length;
289 length -= in_chunk_length;
290 offset += in_chunk_length;
293 /* Fire off bio's here */
295 for (cb = bioq_first(&bq); cb != NULL; cb = bioq_first(&bq)) {
296 bioq_remove(&bq, cb);
297 pv = cb->bio_caller1;
298 cb->bio_caller1 = NULL;
299 G_LLVM_DEBUG(6, "firing bio to %s, offset=%ju, length=%ju",
300 cb->bio_to->name, cb->bio_offset, cb->bio_length);
301 g_io_request(cb, pv->pv_gcons);
304 if (count == 0) { /* We handled everything locally */
305 bp->bio_completed = bp->bio_length;
311 g_llvm_remove_disk(struct g_llvm_vg *vg, struct g_consumer *cp)
313 struct g_llvm_pv *pv;
314 struct g_llvm_lv *lv;
315 struct g_llvm_segment *sg;
318 KASSERT(cp != NULL, ("Non-valid disk in %s.", __func__));
319 pv = (struct g_llvm_pv *)cp->private;
321 G_LLVM_DEBUG(0, "Disk %s removed from %s.", cp->provider->name,
324 LIST_FOREACH(lv, &vg->vg_lvs, lv_next) {
325 /* Find segments that map to this disk */
327 LIST_FOREACH(sg, &lv->lv_segs, sg_next) {
328 if (sg->sg_pv == pv) {
336 G_LLVM_DEBUG(0, "Device %s removed.",
338 g_wither_provider(lv->lv_gprov, ENXIO);
343 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
344 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
346 g_destroy_consumer(cp);
350 g_llvm_orphan(struct g_consumer *cp)
352 struct g_llvm_vg *vg;
361 g_llvm_remove_disk(vg, cp);
362 g_llvm_destroy(vg, 1);
366 g_llvm_activate_lv(struct g_llvm_vg *vg, struct g_llvm_lv *lv)
369 struct g_provider *pp;
373 KASSERT(lv->lv_sgactive == lv->lv_sgcount, ("segment missing"));
376 pp = g_new_providerf(gp, "linux_lvm/%s-%s", vg->vg_name, lv->lv_name);
377 pp->mediasize = vg->vg_extentsize * (off_t)lv->lv_extentcount;
378 pp->sectorsize = vg->vg_sectorsize;
379 g_error_provider(pp, 0);
383 G_LLVM_DEBUG(1, "Created %s, %juM", pp->name,
384 pp->mediasize / (1024*1024));
390 g_llvm_add_disk(struct g_llvm_vg *vg, struct g_provider *pp, char *uuid)
393 struct g_consumer *cp, *fcp;
394 struct g_llvm_pv *pv;
395 struct g_llvm_lv *lv;
396 struct g_llvm_segment *sg;
401 LIST_FOREACH(pv, &vg->vg_pvs, pv_next) {
402 if (strcmp(pv->pv_uuid, uuid) == 0)
403 break; /* found it */
406 G_LLVM_DEBUG(3, "uuid %s not found in pv list", uuid);
409 if (pv->pv_gprov != NULL) {
410 G_LLVM_DEBUG(0, "disk %s already initialised in %s",
411 pv->pv_name, vg->vg_name);
415 pv->pv_start *= vg->vg_sectorsize;
417 fcp = LIST_FIRST(&gp->consumer);
419 cp = g_new_consumer(gp);
420 error = g_attach(cp, pp);
421 G_LLVM_DEBUG(1, "Attached %s to %s at offset %ju",
422 pp->name, pv->pv_name, pv->pv_start);
425 G_LLVM_DEBUG(0, "cannot attach %s to %s",
426 pp->name, vg->vg_name);
427 g_destroy_consumer(cp);
432 if (fcp->provider->sectorsize != pp->sectorsize) {
433 G_LLVM_DEBUG(0, "Provider %s of %s has invalid "
434 "sector size (%d)", pp->name, vg->vg_name,
438 if (fcp->acr > 0 || fcp->acw || fcp->ace > 0) {
439 /* Replicate access permissions from first "live"
440 * consumer to the new one */
441 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace);
444 g_destroy_consumer(cp);
454 LIST_FOREACH(lv, &vg->vg_lvs, lv_next) {
455 /* Find segments that map to this disk */
456 LIST_FOREACH(sg, &lv->lv_segs, sg_next) {
457 if (strcmp(sg->sg_pvname, pv->pv_name) == 0) {
458 /* avtivate the segment */
459 KASSERT(sg->sg_pv == NULL,
460 ("segment already mapped"));
462 (off_t)sg->sg_pvstart * vg->vg_extentsize
467 G_LLVM_DEBUG(2, "%s: %d to %d @ %s:%d"
468 " offset %ju sector %ju",
469 lv->lv_name, sg->sg_start, sg->sg_end,
470 sg->sg_pvname, sg->sg_pvstart,
472 sg->sg_pvoffset / vg->vg_sectorsize);
475 /* Activate any lvs waiting on this disk */
476 if (lv->lv_gprov == NULL && lv->lv_sgactive == lv->lv_sgcount) {
477 error = g_llvm_activate_lv(vg, lv);
486 g_llvm_init(struct g_class *mp)
492 g_llvm_free_vg(struct g_llvm_vg *vg)
494 struct g_llvm_pv *pv;
495 struct g_llvm_lv *lv;
496 struct g_llvm_segment *sg;
498 /* Free all the structures */
499 while ((pv = LIST_FIRST(&vg->vg_pvs)) != NULL) {
500 LIST_REMOVE(pv, pv_next);
503 while ((lv = LIST_FIRST(&vg->vg_lvs)) != NULL) {
504 while ((sg = LIST_FIRST(&lv->lv_segs)) != NULL) {
505 LIST_REMOVE(sg, sg_next);
508 LIST_REMOVE(lv, lv_next);
511 LIST_REMOVE(vg, vg_next);
516 g_llvm_taste_orphan(struct g_consumer *cp)
519 KASSERT(1 == 0, ("%s called while tasting %s.", __func__,
520 cp->provider->name));
523 static struct g_geom *
524 g_llvm_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
526 struct g_consumer *cp;
528 struct g_llvm_label ll;
529 struct g_llvm_metadata md;
530 struct g_llvm_vg *vg;
533 bzero(&md, sizeof(md));
536 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
537 gp = g_new_geomf(mp, "linux_lvm:taste");
538 /* This orphan function should be never called. */
539 gp->orphan = g_llvm_taste_orphan;
540 cp = g_new_consumer(gp);
542 error = g_llvm_read_label(cp, &ll);
544 error = g_llvm_read_md(cp, &md, &ll);
546 g_destroy_consumer(cp);
552 if (vg->vg_geom == NULL) {
553 /* new volume group */
554 gp = g_new_geomf(mp, "%s", vg->vg_name);
555 gp->start = g_llvm_start;
556 gp->spoiled = g_llvm_orphan;
557 gp->orphan = g_llvm_orphan;
558 gp->access = g_llvm_access;
559 vg->vg_sectorsize = pp->sectorsize;
560 vg->vg_extentsize *= vg->vg_sectorsize;
563 G_LLVM_DEBUG(1, "Created volume %s, extent size %zuK",
564 vg->vg_name, vg->vg_extentsize / 1024);
567 /* initialise this disk in the volume group */
568 g_llvm_add_disk(vg, pp, ll.ll_uuid);
569 return (vg->vg_geom);
573 g_llvm_destroy(struct g_llvm_vg *vg, int force)
575 struct g_provider *pp;
583 LIST_FOREACH(pp, &gp->provider, provider) {
584 if (pp->acr != 0 || pp->acw != 0 || pp->ace != 0) {
585 G_LLVM_DEBUG(1, "Device %s is still open (r%dw%de%d)",
586 pp->name, pp->acr, pp->acw, pp->ace);
592 g_llvm_free_vg(gp->softc);
594 g_wither_geom(gp, ENXIO);
599 g_llvm_destroy_geom(struct gctl_req *req __unused, struct g_class *mp __unused,
602 struct g_llvm_vg *vg;
605 return (g_llvm_destroy(vg, 0));
609 g_llvm_read_label(struct g_consumer *cp, struct g_llvm_label *ll)
611 struct g_provider *pp;
617 /* The LVM label is stored on the first four sectors */
618 error = g_access(cp, 1, 0, 0);
623 buf = g_read_data(cp, 0, pp->sectorsize * 4, &error);
625 g_access(cp, -1, 0, 0);
627 G_LLVM_DEBUG(1, "Cannot read metadata from %s (error=%d)",
632 /* Search the four sectors for the LVM label. */
633 for (i = 0; i < 4; i++) {
634 error = llvm_label_decode(&buf[i * pp->sectorsize], ll, i);
636 break; /* found it */
643 g_llvm_read_md(struct g_consumer *cp, struct g_llvm_metadata *md,
644 struct g_llvm_label *ll)
646 struct g_provider *pp;
653 error = g_access(cp, 1, 0, 0);
658 buf = g_read_data(cp, ll->ll_md_offset, pp->sectorsize, &error);
660 g_access(cp, -1, 0, 0);
662 G_LLVM_DEBUG(0, "Cannot read metadata from %s (error=%d)",
663 cp->provider->name, error);
667 error = llvm_md_decode(buf, md, ll);
673 G_LLVM_DEBUG(1, "reading LVM2 config @ %s:%ju", pp->name,
674 ll->ll_md_offset + md->md_reloffset);
675 error = g_access(cp, 1, 0, 0);
680 /* round up to the nearest sector */
681 size = md->md_relsize +
682 (pp->sectorsize - md->md_relsize % pp->sectorsize);
683 buf = g_read_data(cp, ll->ll_md_offset + md->md_reloffset, size, &error);
685 g_access(cp, -1, 0, 0);
687 G_LLVM_DEBUG(0, "Cannot read LVM2 config from %s (error=%d)",
691 buf[md->md_relsize] = '\0';
692 G_LLVM_DEBUG(10, "LVM config:\n%s\n", buf);
693 error = llvm_textconf_decode(buf, md->md_relsize, md);
700 llvm_label_decode(const u_char *data, struct g_llvm_label *ll, int sector)
706 if (bcmp("LABELONE", data , 8) != 0)
709 /* We only support LVM2 text format */
710 if (bcmp("LVM2 001", data + 24, 8) != 0) {
711 G_LLVM_DEBUG(0, "Unsupported LVM format");
715 ll->ll_sector = le64dec(data + 8);
716 ll->ll_crc = le32dec(data + 16);
717 ll->ll_offset = le32dec(data + 20);
719 if (ll->ll_sector != sector) {
720 G_LLVM_DEBUG(0, "Expected sector %ju, found at %d",
721 ll->ll_sector, sector);
727 * convert the binary uuid to string format, the format is
728 * xxxxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxxxx (6-4-4-4-4-4-6)
731 bcopy(data + off, uuid, 6);
735 for (int i = 0; i < 5; i++) {
736 bcopy(data + off, uuid, 4);
741 bcopy(data + off, uuid, 6);
746 ll->ll_size = le64dec(data + off);
748 ll->ll_pestart = le64dec(data + off);
751 /* Only one data section is supported */
752 if (le64dec(data + off) != 0) {
753 G_LLVM_DEBUG(0, "Only one data section supported");
758 ll->ll_md_offset = le64dec(data + off);
760 ll->ll_md_size = le64dec(data + off);
763 G_LLVM_DEBUG(1, "LVM metadata: offset=%ju, size=%ju", ll->ll_md_offset,
766 /* Only one data section is supported */
767 if (le64dec(data + off) != 0) {
768 G_LLVM_DEBUG(0, "Only one metadata section supported");
772 G_LLVM_DEBUG(2, "label uuid=%s", ll->ll_uuid);
773 G_LLVM_DEBUG(2, "sector=%ju, crc=%u, offset=%u, size=%ju, pestart=%ju",
774 ll->ll_sector, ll->ll_crc, ll->ll_offset, ll->ll_size,
781 llvm_md_decode(const u_char *data, struct g_llvm_metadata *md,
782 struct g_llvm_label *ll)
788 md->md_csum = le32dec(data + off);
790 bcopy(data + off, magic, 16);
792 md->md_version = le32dec(data + off);
794 md->md_start = le64dec(data + off);
796 md->md_size = le64dec(data + off);
799 if (bcmp(G_LLVM_MAGIC, magic, 16) != 0) {
800 G_LLVM_DEBUG(0, "Incorrect md magic number");
803 if (md->md_version != 1) {
804 G_LLVM_DEBUG(0, "Incorrect md version number (%u)",
808 if (md->md_start != ll->ll_md_offset) {
809 G_LLVM_DEBUG(0, "Incorrect md offset (%ju)", md->md_start);
813 /* Aparently only one is ever returned */
814 md->md_reloffset = le64dec(data + off);
816 md->md_relsize = le64dec(data + off);
817 off += 16; /* XXX skipped checksum */
819 if (le64dec(data + off) != 0) {
820 G_LLVM_DEBUG(0, "Only one reloc supported");
824 G_LLVM_DEBUG(3, "reloc: offset=%ju, size=%ju",
825 md->md_reloffset, md->md_relsize);
826 G_LLVM_DEBUG(3, "md: version=%u, start=%ju, size=%ju",
827 md->md_version, md->md_start, md->md_size);
832 #define GRAB_INT(key, tok1, tok2, v) \
833 if (tok1 && tok2 && strncmp(tok1, key, sizeof(key)) == 0) { \
834 v = strtol(tok2, &tok1, 10); \
836 /* strtol did not eat any of the buffer */ \
841 #define GRAB_STR(key, tok1, tok2, v, len) \
842 if (tok1 && tok2 && strncmp(tok1, key, sizeof(key)) == 0) { \
843 strsep(&tok2, "\""); \
846 tok1 = strsep(&tok2, "\""); \
849 strncpy(v, tok1, len); \
853 #define SPLIT(key, value, str) \
854 key = strsep(&value, str); \
855 /* strip trailing whitespace on the key */ \
856 for (char *t = key; *t != '\0'; t++) \
863 llvm_grab_name(char *name, const char *tok)
872 if (strcmp(tok, ".") == 0 || strcmp(tok, "..") == 0)
874 while (tok[len] && (isalpha(tok[len]) || isdigit(tok[len]) ||
875 tok[len] == '.' || tok[len] == '_' || tok[len] == '-' ||
876 tok[len] == '+') && len < G_LLVM_NAMELEN - 1)
878 bcopy(tok, name, len);
884 llvm_textconf_decode(u_char *data, int buflen, struct g_llvm_metadata *md)
886 struct g_llvm_vg *vg;
889 char name[G_LLVM_NAMELEN];
890 char uuid[G_LLVM_UUIDLEN];
893 if (buf == NULL || *buf == '\0')
896 tok = strsep(&buf, "\n");
899 len = llvm_grab_name(name, tok);
903 /* check too see if the vg has already been loaded off another disk */
904 LIST_FOREACH(vg, &vg_list, vg_next) {
905 if (strcmp(vg->vg_name, name) == 0) {
907 /* grab the volume group uuid */
908 while ((tok = strsep(&buf, "\n")) != NULL) {
909 if (strstr(tok, "{"))
911 if (strstr(tok, "=")) {
913 GRAB_STR("id", v, tok, uuid,
917 if (strcmp(vg->vg_uuid, uuid) == 0) {
922 /* XXX different volume group with name clash! */
924 "%s already exists, volume group not loaded", name);
929 vg = malloc(sizeof(*vg), M_GLLVM, M_NOWAIT|M_ZERO);
933 strncpy(vg->vg_name, name, sizeof(vg->vg_name));
934 LIST_INIT(&vg->vg_pvs);
935 LIST_INIT(&vg->vg_lvs);
937 #define VOL_FOREACH(func, tok, buf, p) \
938 while ((tok = strsep(buf, "\n")) != NULL) { \
939 if (strstr(tok, "{")) { \
943 if (strstr(tok, "}")) \
947 while ((tok = strsep(&buf, "\n")) != NULL) {
948 if (strcmp(tok, "physical_volumes {") == 0) {
949 VOL_FOREACH(llvm_textconf_decode_pv, tok, &buf, vg);
952 if (strcmp(tok, "logical_volumes {") == 0) {
953 VOL_FOREACH(llvm_textconf_decode_lv, tok, &buf, vg);
956 if (strstr(tok, "{")) {
957 G_LLVM_DEBUG(2, "unknown section %s", tok);
961 /* parse 'key = value' lines */
962 if (strstr(tok, "=")) {
964 GRAB_STR("id", v, tok, vg->vg_uuid, sizeof(vg->vg_uuid));
965 GRAB_INT("extent_size", v, tok, vg->vg_extentsize);
970 if (vg->vg_extentsize == 0)
974 LIST_INSERT_HEAD(&vg_list, vg, vg_next);
975 G_LLVM_DEBUG(3, "vg: name=%s uuid=%s", vg->vg_name, vg->vg_uuid);
985 llvm_textconf_decode_pv(char **buf, char *tok, struct g_llvm_vg *vg)
987 struct g_llvm_pv *pv;
991 if (*buf == NULL || **buf == '\0')
994 pv = malloc(sizeof(*pv), M_GLLVM, M_NOWAIT|M_ZERO);
1002 len = llvm_grab_name(pv->pv_name, tok);
1006 while ((tok = strsep(buf, "\n")) != NULL) {
1007 if (strstr(tok, "{"))
1010 if (strstr(tok, "}"))
1013 /* parse 'key = value' lines */
1014 if (strstr(tok, "=")) {
1016 GRAB_STR("id", v, tok, pv->pv_uuid, sizeof(pv->pv_uuid));
1017 GRAB_INT("pe_start", v, tok, pv->pv_start);
1018 GRAB_INT("pe_count", v, tok, pv->pv_count);
1024 /* basic checking */
1025 if (pv->pv_count == 0)
1028 LIST_INSERT_HEAD(&vg->vg_pvs, pv, pv_next);
1029 G_LLVM_DEBUG(3, "pv: name=%s uuid=%s", pv->pv_name, pv->pv_uuid);
1038 llvm_textconf_decode_lv(char **buf, char *tok, struct g_llvm_vg *vg)
1040 struct g_llvm_lv *lv;
1041 struct g_llvm_segment *sg;
1045 if (*buf == NULL || **buf == '\0')
1048 lv = malloc(sizeof(*lv), M_GLLVM, M_NOWAIT|M_ZERO);
1053 LIST_INIT(&lv->lv_segs);
1057 len = llvm_grab_name(lv->lv_name, tok);
1061 while ((tok = strsep(buf, "\n")) != NULL) {
1062 if (strstr(tok, "{")) {
1063 if (strstr(tok, "segment")) {
1064 llvm_textconf_decode_sg(buf, tok, lv);
1067 /* unexpected section */
1071 if (strstr(tok, "}"))
1074 /* parse 'key = value' lines */
1075 if (strstr(tok, "=")) {
1077 GRAB_STR("id", v, tok, lv->lv_uuid, sizeof(lv->lv_uuid));
1078 GRAB_INT("segment_count", v, tok, lv->lv_sgcount);
1084 if (lv->lv_sgcount == 0 || lv->lv_sgcount != lv->lv_numsegs)
1085 /* zero or incomplete segment list */
1088 /* Optimize for only one segment on the pv */
1089 lv->lv_firstsg = LIST_FIRST(&lv->lv_segs);
1090 LIST_INSERT_HEAD(&vg->vg_lvs, lv, lv_next);
1091 G_LLVM_DEBUG(3, "lv: name=%s uuid=%s", lv->lv_name, lv->lv_uuid);
1095 while ((sg = LIST_FIRST(&lv->lv_segs)) != NULL) {
1096 LIST_REMOVE(sg, sg_next);
1104 llvm_textconf_decode_sg(char **buf, char *tok, struct g_llvm_lv *lv)
1106 struct g_llvm_segment *sg;
1110 if (*buf == NULL || **buf == '\0')
1113 sg = malloc(sizeof(*sg), M_GLLVM, M_NOWAIT|M_ZERO);
1117 while ((tok = strsep(buf, "\n")) != NULL) {
1118 /* only a single linear stripe is supported */
1119 if (strstr(tok, "stripe_count")) {
1121 GRAB_INT("stripe_count", v, tok, count);
1126 if (strstr(tok, "{"))
1129 if (strstr(tok, "}"))
1132 if (strcmp(tok, "stripes = [") == 0) {
1133 tok = strsep(buf, "\n");
1139 goto bad; /* missing open quotes */
1140 v = strsep(&tok, "\"");
1142 goto bad; /* missing close quotes */
1143 strncpy(sg->sg_pvname, v, sizeof(sg->sg_pvname));
1145 goto bad; /* missing comma for stripe */
1148 sg->sg_pvstart = strtol(tok, &v, 10);
1150 /* strtol did not eat any of the buffer */
1156 /* parse 'key = value' lines */
1157 if (strstr(tok, "=")) {
1159 GRAB_INT("start_extent", v, tok, sg->sg_start);
1160 GRAB_INT("extent_count", v, tok, sg->sg_count);
1166 /* basic checking */
1167 if (count != 1 || sg->sg_count == 0)
1170 sg->sg_end = sg->sg_start + sg->sg_count - 1;
1172 lv->lv_extentcount += sg->sg_count;
1173 LIST_INSERT_HEAD(&lv->lv_segs, sg, sg_next);
1184 static struct g_class g_llvm_class = {
1185 .name = G_LLVM_CLASS_NAME,
1186 .version = G_VERSION,
1187 .init = g_llvm_init,
1188 .taste = g_llvm_taste,
1189 .destroy_geom = g_llvm_destroy_geom
1192 DECLARE_GEOM_CLASS(g_llvm_class, g_linux_lvm);
1193 MODULE_VERSION(geom_linux_lvm, 0);