2 * Copyright (c) 2008 Andrew Thompson <thompsa@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/ctype.h>
31 #include <sys/param.h>
33 #include <sys/kernel.h>
34 #include <sys/limits.h>
35 #include <sys/malloc.h>
36 #include <sys/queue.h>
37 #include <sys/sysctl.h>
38 #include <sys/systm.h>
40 #include <geom/geom.h>
41 #include <sys/endian.h>
43 #include <geom/linux_lvm/g_linux_lvm.h>
45 FEATURE(geom_linux_lvm, "GEOM Linux LVM partitioning support");
47 /* Declare malloc(9) label */
48 static MALLOC_DEFINE(M_GLLVM, "gllvm", "GEOM_LINUX_LVM Data");
50 /* GEOM class methods */
51 static g_access_t g_llvm_access;
52 static g_init_t g_llvm_init;
53 static g_orphan_t g_llvm_orphan;
54 static g_orphan_t g_llvm_taste_orphan;
55 static g_start_t g_llvm_start;
56 static g_taste_t g_llvm_taste;
57 static g_ctl_destroy_geom_t g_llvm_destroy_geom;
59 static void g_llvm_done(struct bio *);
60 static void g_llvm_remove_disk(struct g_llvm_vg *, struct g_consumer *);
61 static int g_llvm_activate_lv(struct g_llvm_vg *, struct g_llvm_lv *);
62 static int g_llvm_add_disk(struct g_llvm_vg *, struct g_provider *, char *);
63 static void g_llvm_free_vg(struct g_llvm_vg *);
64 static int g_llvm_destroy(struct g_llvm_vg *, int);
65 static int g_llvm_read_label(struct g_consumer *, struct g_llvm_label *);
66 static int g_llvm_read_md(struct g_consumer *, struct g_llvm_metadata *,
67 struct g_llvm_label *);
69 static int llvm_label_decode(const u_char *, struct g_llvm_label *, int);
70 static int llvm_md_decode(const u_char *, struct g_llvm_metadata *,
71 struct g_llvm_label *);
72 static int llvm_textconf_decode(u_char *, int,
73 struct g_llvm_metadata *);
74 static int llvm_textconf_decode_pv(char **, char *, struct g_llvm_vg *);
75 static int llvm_textconf_decode_lv(char **, char *, struct g_llvm_vg *);
76 static int llvm_textconf_decode_sg(char **, char *, struct g_llvm_lv *);
78 SYSCTL_DECL(_kern_geom);
79 SYSCTL_NODE(_kern_geom, OID_AUTO, linux_lvm, CTLFLAG_RW, 0,
80 "GEOM_LINUX_LVM stuff");
81 static u_int g_llvm_debug = 0;
82 TUNABLE_INT("kern.geom.linux_lvm.debug", &g_llvm_debug);
83 SYSCTL_UINT(_kern_geom_linux_lvm, OID_AUTO, debug, CTLFLAG_RW, &g_llvm_debug, 0,
86 LIST_HEAD(, g_llvm_vg) vg_list;
89 * Called to notify geom when it's been opened, and for what intent
92 g_llvm_access(struct g_provider *pp, int dr, int dw, int de)
99 KASSERT(pp != NULL, ("%s: NULL provider", __func__));
101 KASSERT(gp != NULL, ("%s: NULL geom", __func__));
105 /* It seems that .access can be called with negative dr,dw,dx
106 * in this case but I want to check for myself */
107 G_LLVM_DEBUG(0, "access(%d, %d, %d) for %s",
108 dr, dw, de, pp->name);
110 /* This should only happen when geom is withered so
111 * allow only negative requests */
112 KASSERT(dr <= 0 && dw <= 0 && de <= 0,
113 ("%s: Positive access for %s", __func__, pp->name));
114 if (pp->acr + dr == 0 && pp->acw + dw == 0 && pp->ace + de == 0)
116 "Device %s definitely destroyed", pp->name);
120 /* Grab an exclusive bit to propagate on our consumers on first open */
121 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)
123 /* ... drop it on close */
124 if (pp->acr + dr == 0 && pp->acw + dw == 0 && pp->ace + de == 0)
128 LIST_FOREACH(c, &gp->consumer, consumer) {
129 KASSERT(c != NULL, ("%s: consumer is NULL", __func__));
130 error = g_access(c, dr, dw, de);
132 struct g_consumer *c2;
134 /* Backout earlier changes */
135 LIST_FOREACH(c2, &gp->consumer, consumer) {
136 if (c2 == c) /* all eariler components fixed */
138 g_access(c2, -dr, -dw, -de);
147 * Dismantle bio_queue and destroy its components
150 bioq_dismantle(struct bio_queue_head *bq)
154 for (b = bioq_first(bq); b != NULL; b = bioq_first(bq)) {
162 * Can't use standard handler because one requested IO may
163 * fork into additional data IOs
166 g_llvm_done(struct bio *b)
168 struct bio *parent_b;
170 parent_b = b->bio_parent;
172 if (b->bio_error != 0) {
173 G_LLVM_DEBUG(0, "Error %d for offset=%ju, length=%ju on %s",
174 b->bio_error, b->bio_offset, b->bio_length,
176 if (parent_b->bio_error == 0)
177 parent_b->bio_error = b->bio_error;
180 parent_b->bio_inbed++;
181 parent_b->bio_completed += b->bio_completed;
183 if (parent_b->bio_children == parent_b->bio_inbed) {
184 parent_b->bio_completed = parent_b->bio_length;
185 g_io_deliver(parent_b, parent_b->bio_error);
191 g_llvm_start(struct bio *bp)
193 struct g_provider *pp;
194 struct g_llvm_vg *vg;
195 struct g_llvm_pv *pv;
196 struct g_llvm_lv *lv;
197 struct g_llvm_segment *sg;
199 struct bio_queue_head bq;
201 off_t offset, length;
207 vg = pp->geom->softc;
209 switch (bp->bio_cmd) {
213 /* XXX BIO_GETATTR allowed? */
216 g_io_deliver(bp, EOPNOTSUPP);
222 chunk_size = vg->vg_extentsize;
224 offset = bp->bio_offset; /* virtual offset and length */
225 length = bp->bio_length;
228 size_t chunk_index, in_chunk_offset, in_chunk_length;
231 cb = g_clone_bio(bp);
234 if (bp->bio_error == 0)
235 bp->bio_error = ENOMEM;
236 g_io_deliver(bp, bp->bio_error);
240 /* get the segment and the pv */
241 if (lv->lv_sgcount == 1) {
242 /* skip much of the calculations for a single sg */
245 in_chunk_length = length;
248 cb->bio_offset = offset + sg->sg_pvoffset;
250 chunk_index = offset / chunk_size; /* round downwards */
251 in_chunk_offset = offset % chunk_size;
253 min(length, chunk_size - in_chunk_offset);
255 /* XXX could be faster */
256 LIST_FOREACH(sg, &lv->lv_segs, sg_next) {
257 if (chunk_index >= sg->sg_start &&
258 chunk_index <= sg->sg_end) {
259 /* adjust chunk index for sg start */
260 chunk_index -= sg->sg_start;
266 (off_t)chunk_index * (off_t)chunk_size
267 + in_chunk_offset + sg->sg_pvoffset;
270 KASSERT(pv != NULL, ("Can't find PV for chunk %zu",
273 cb->bio_to = pv->pv_gprov;
274 cb->bio_done = g_llvm_done;
275 cb->bio_length = in_chunk_length;
277 cb->bio_caller1 = pv;
278 bioq_disksort(&bq, cb);
281 "Mapped %s(%ju, %ju) on %s to %zu(%zu,%zu) @ %s:%ju",
282 bp->bio_cmd == BIO_READ ? "R" : "W",
283 offset, length, lv->lv_name,
284 chunk_index, in_chunk_offset, in_chunk_length,
285 pv->pv_name, cb->bio_offset);
287 addr += in_chunk_length;
288 length -= in_chunk_length;
289 offset += in_chunk_length;
292 /* Fire off bio's here */
294 for (cb = bioq_first(&bq); cb != NULL; cb = bioq_first(&bq)) {
295 bioq_remove(&bq, cb);
296 pv = cb->bio_caller1;
297 cb->bio_caller1 = NULL;
298 G_LLVM_DEBUG(6, "firing bio to %s, offset=%ju, length=%ju",
299 cb->bio_to->name, cb->bio_offset, cb->bio_length);
300 g_io_request(cb, pv->pv_gcons);
303 if (count == 0) { /* We handled everything locally */
304 bp->bio_completed = bp->bio_length;
310 g_llvm_remove_disk(struct g_llvm_vg *vg, struct g_consumer *cp)
312 struct g_llvm_pv *pv;
313 struct g_llvm_lv *lv;
314 struct g_llvm_segment *sg;
317 KASSERT(cp != NULL, ("Non-valid disk in %s.", __func__));
318 pv = (struct g_llvm_pv *)cp->private;
320 G_LLVM_DEBUG(0, "Disk %s removed from %s.", cp->provider->name,
323 LIST_FOREACH(lv, &vg->vg_lvs, lv_next) {
324 /* Find segments that map to this disk */
326 LIST_FOREACH(sg, &lv->lv_segs, sg_next) {
327 if (sg->sg_pv == pv) {
335 G_LLVM_DEBUG(0, "Device %s removed.",
337 g_orphan_provider(lv->lv_gprov, ENXIO);
342 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
343 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
345 g_destroy_consumer(cp);
349 g_llvm_orphan(struct g_consumer *cp)
351 struct g_llvm_vg *vg;
360 g_llvm_remove_disk(vg, cp);
361 g_llvm_destroy(vg, 1);
365 g_llvm_activate_lv(struct g_llvm_vg *vg, struct g_llvm_lv *lv)
368 struct g_provider *pp;
372 KASSERT(lv->lv_sgactive == lv->lv_sgcount, ("segment missing"));
375 pp = g_new_providerf(gp, "linux_lvm/%s-%s", vg->vg_name, lv->lv_name);
376 pp->mediasize = vg->vg_extentsize * (off_t)lv->lv_extentcount;
377 pp->sectorsize = vg->vg_sectorsize;
378 g_error_provider(pp, 0);
382 G_LLVM_DEBUG(1, "Created %s, %juM", pp->name,
383 pp->mediasize / (1024*1024));
389 g_llvm_add_disk(struct g_llvm_vg *vg, struct g_provider *pp, char *uuid)
392 struct g_consumer *cp, *fcp;
393 struct g_llvm_pv *pv;
394 struct g_llvm_lv *lv;
395 struct g_llvm_segment *sg;
400 LIST_FOREACH(pv, &vg->vg_pvs, pv_next) {
401 if (strcmp(pv->pv_uuid, uuid) == 0)
402 break; /* found it */
405 G_LLVM_DEBUG(3, "uuid %s not found in pv list", uuid);
408 if (pv->pv_gprov != NULL) {
409 G_LLVM_DEBUG(0, "disk %s already initialised in %s",
410 pv->pv_name, vg->vg_name);
414 pv->pv_start *= vg->vg_sectorsize;
416 fcp = LIST_FIRST(&gp->consumer);
418 cp = g_new_consumer(gp);
419 error = g_attach(cp, pp);
420 G_LLVM_DEBUG(1, "Attached %s to %s at offset %ju",
421 pp->name, pv->pv_name, pv->pv_start);
424 G_LLVM_DEBUG(0, "cannot attach %s to %s",
425 pp->name, vg->vg_name);
426 g_destroy_consumer(cp);
431 if (fcp->provider->sectorsize != pp->sectorsize) {
432 G_LLVM_DEBUG(0, "Provider %s of %s has invalid "
433 "sector size (%d)", pp->name, vg->vg_name,
437 if (fcp->acr > 0 || fcp->acw || fcp->ace > 0) {
438 /* Replicate access permissions from first "live"
439 * consumer to the new one */
440 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace);
443 g_destroy_consumer(cp);
453 LIST_FOREACH(lv, &vg->vg_lvs, lv_next) {
454 /* Find segments that map to this disk */
455 LIST_FOREACH(sg, &lv->lv_segs, sg_next) {
456 if (strcmp(sg->sg_pvname, pv->pv_name) == 0) {
457 /* avtivate the segment */
458 KASSERT(sg->sg_pv == NULL,
459 ("segment already mapped"));
461 (off_t)sg->sg_pvstart * vg->vg_extentsize
466 G_LLVM_DEBUG(2, "%s: %d to %d @ %s:%d"
467 " offset %ju sector %ju",
468 lv->lv_name, sg->sg_start, sg->sg_end,
469 sg->sg_pvname, sg->sg_pvstart,
471 sg->sg_pvoffset / vg->vg_sectorsize);
474 /* Activate any lvs waiting on this disk */
475 if (lv->lv_gprov == NULL && lv->lv_sgactive == lv->lv_sgcount) {
476 error = g_llvm_activate_lv(vg, lv);
485 g_llvm_init(struct g_class *mp)
491 g_llvm_free_vg(struct g_llvm_vg *vg)
493 struct g_llvm_pv *pv;
494 struct g_llvm_lv *lv;
495 struct g_llvm_segment *sg;
497 /* Free all the structures */
498 while ((pv = LIST_FIRST(&vg->vg_pvs)) != NULL) {
499 LIST_REMOVE(pv, pv_next);
502 while ((lv = LIST_FIRST(&vg->vg_lvs)) != NULL) {
503 while ((sg = LIST_FIRST(&lv->lv_segs)) != NULL) {
504 LIST_REMOVE(sg, sg_next);
507 LIST_REMOVE(lv, lv_next);
510 LIST_REMOVE(vg, vg_next);
515 g_llvm_taste_orphan(struct g_consumer *cp)
518 KASSERT(1 == 0, ("%s called while tasting %s.", __func__,
519 cp->provider->name));
522 static struct g_geom *
523 g_llvm_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
525 struct g_consumer *cp;
527 struct g_llvm_label ll;
528 struct g_llvm_metadata md;
529 struct g_llvm_vg *vg;
532 bzero(&md, sizeof(md));
535 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
536 gp = g_new_geomf(mp, "linux_lvm:taste");
537 /* This orphan function should be never called. */
538 gp->orphan = g_llvm_taste_orphan;
539 cp = g_new_consumer(gp);
541 error = g_llvm_read_label(cp, &ll);
543 error = g_llvm_read_md(cp, &md, &ll);
545 g_destroy_consumer(cp);
551 if (vg->vg_geom == NULL) {
552 /* new volume group */
553 gp = g_new_geomf(mp, "%s", vg->vg_name);
554 gp->start = g_llvm_start;
555 gp->spoiled = g_llvm_orphan;
556 gp->orphan = g_llvm_orphan;
557 gp->access = g_llvm_access;
558 vg->vg_sectorsize = pp->sectorsize;
559 vg->vg_extentsize *= vg->vg_sectorsize;
562 G_LLVM_DEBUG(1, "Created volume %s, extent size %zuK",
563 vg->vg_name, vg->vg_extentsize / 1024);
566 /* initialise this disk in the volume group */
567 g_llvm_add_disk(vg, pp, ll.ll_uuid);
568 return (vg->vg_geom);
572 g_llvm_destroy(struct g_llvm_vg *vg, int force)
574 struct g_provider *pp;
582 LIST_FOREACH(pp, &gp->provider, provider) {
583 if (pp->acr != 0 || pp->acw != 0 || pp->ace != 0) {
584 G_LLVM_DEBUG(1, "Device %s is still open (r%dw%de%d)",
585 pp->name, pp->acr, pp->acw, pp->ace);
591 g_llvm_free_vg(gp->softc);
593 g_wither_geom(gp, ENXIO);
598 g_llvm_destroy_geom(struct gctl_req *req __unused, struct g_class *mp __unused,
601 struct g_llvm_vg *vg;
604 return (g_llvm_destroy(vg, 0));
608 g_llvm_read_label(struct g_consumer *cp, struct g_llvm_label *ll)
610 struct g_provider *pp;
616 /* The LVM label is stored on the first four sectors */
617 error = g_access(cp, 1, 0, 0);
622 buf = g_read_data(cp, 0, pp->sectorsize * 4, &error);
624 g_access(cp, -1, 0, 0);
626 G_LLVM_DEBUG(1, "Cannot read metadata from %s (error=%d)",
631 /* Search the four sectors for the LVM label. */
632 for (i = 0; i < 4; i++) {
633 error = llvm_label_decode(&buf[i * pp->sectorsize], ll, i);
635 break; /* found it */
642 g_llvm_read_md(struct g_consumer *cp, struct g_llvm_metadata *md,
643 struct g_llvm_label *ll)
645 struct g_provider *pp;
652 error = g_access(cp, 1, 0, 0);
657 buf = g_read_data(cp, ll->ll_md_offset, pp->sectorsize, &error);
659 g_access(cp, -1, 0, 0);
661 G_LLVM_DEBUG(0, "Cannot read metadata from %s (error=%d)",
662 cp->provider->name, error);
666 error = llvm_md_decode(buf, md, ll);
672 G_LLVM_DEBUG(1, "reading LVM2 config @ %s:%ju", pp->name,
673 ll->ll_md_offset + md->md_reloffset);
674 error = g_access(cp, 1, 0, 0);
679 /* round up to the nearest sector */
680 size = md->md_relsize +
681 (pp->sectorsize - md->md_relsize % pp->sectorsize);
682 buf = g_read_data(cp, ll->ll_md_offset + md->md_reloffset, size, &error);
684 g_access(cp, -1, 0, 0);
686 G_LLVM_DEBUG(0, "Cannot read LVM2 config from %s (error=%d)",
690 buf[md->md_relsize] = '\0';
691 G_LLVM_DEBUG(10, "LVM config:\n%s\n", buf);
692 error = llvm_textconf_decode(buf, md->md_relsize, md);
699 llvm_label_decode(const u_char *data, struct g_llvm_label *ll, int sector)
705 if (bcmp("LABELONE", data , 8) != 0)
708 /* We only support LVM2 text format */
709 if (bcmp("LVM2 001", data + 24, 8) != 0) {
710 G_LLVM_DEBUG(0, "Unsupported LVM format");
714 ll->ll_sector = le64dec(data + 8);
715 ll->ll_crc = le32dec(data + 16);
716 ll->ll_offset = le32dec(data + 20);
718 if (ll->ll_sector != sector) {
719 G_LLVM_DEBUG(0, "Expected sector %ju, found at %d",
720 ll->ll_sector, sector);
726 * convert the binary uuid to string format, the format is
727 * xxxxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxxxx (6-4-4-4-4-4-6)
730 bcopy(data + off, uuid, 6);
734 for (int i = 0; i < 5; i++) {
735 bcopy(data + off, uuid, 4);
740 bcopy(data + off, uuid, 6);
745 ll->ll_size = le64dec(data + off);
747 ll->ll_pestart = le64dec(data + off);
750 /* Only one data section is supported */
751 if (le64dec(data + off) != 0) {
752 G_LLVM_DEBUG(0, "Only one data section supported");
757 ll->ll_md_offset = le64dec(data + off);
759 ll->ll_md_size = le64dec(data + off);
762 G_LLVM_DEBUG(1, "LVM metadata: offset=%ju, size=%ju", ll->ll_md_offset,
765 /* Only one data section is supported */
766 if (le64dec(data + off) != 0) {
767 G_LLVM_DEBUG(0, "Only one metadata section supported");
771 G_LLVM_DEBUG(2, "label uuid=%s", ll->ll_uuid);
772 G_LLVM_DEBUG(2, "sector=%ju, crc=%u, offset=%u, size=%ju, pestart=%ju",
773 ll->ll_sector, ll->ll_crc, ll->ll_offset, ll->ll_size,
780 llvm_md_decode(const u_char *data, struct g_llvm_metadata *md,
781 struct g_llvm_label *ll)
787 md->md_csum = le32dec(data + off);
789 bcopy(data + off, magic, 16);
791 md->md_version = le32dec(data + off);
793 md->md_start = le64dec(data + off);
795 md->md_size = le64dec(data + off);
798 if (bcmp(G_LLVM_MAGIC, magic, 16) != 0) {
799 G_LLVM_DEBUG(0, "Incorrect md magic number");
802 if (md->md_version != 1) {
803 G_LLVM_DEBUG(0, "Incorrect md version number (%u)",
807 if (md->md_start != ll->ll_md_offset) {
808 G_LLVM_DEBUG(0, "Incorrect md offset (%ju)", md->md_start);
812 /* Aparently only one is ever returned */
813 md->md_reloffset = le64dec(data + off);
815 md->md_relsize = le64dec(data + off);
816 off += 16; /* XXX skipped checksum */
818 if (le64dec(data + off) != 0) {
819 G_LLVM_DEBUG(0, "Only one reloc supported");
823 G_LLVM_DEBUG(3, "reloc: offset=%ju, size=%ju",
824 md->md_reloffset, md->md_relsize);
825 G_LLVM_DEBUG(3, "md: version=%u, start=%ju, size=%ju",
826 md->md_version, md->md_start, md->md_size);
831 #define GRAB_INT(key, tok1, tok2, v) \
832 if (tok1 && tok2 && strncmp(tok1, key, sizeof(key)) == 0) { \
833 v = strtol(tok2, &tok1, 10); \
835 /* strtol did not eat any of the buffer */ \
840 #define GRAB_STR(key, tok1, tok2, v, len) \
841 if (tok1 && tok2 && strncmp(tok1, key, sizeof(key)) == 0) { \
842 strsep(&tok2, "\""); \
845 tok1 = strsep(&tok2, "\""); \
848 strncpy(v, tok1, len); \
852 #define SPLIT(key, value, str) \
853 key = strsep(&value, str); \
854 /* strip trailing whitespace on the key */ \
855 for (char *t = key; *t != '\0'; t++) \
862 llvm_grab_name(char *name, const char *tok)
871 if (strcmp(tok, ".") == 0 || strcmp(tok, "..") == 0)
873 while (tok[len] && (isalpha(tok[len]) || isdigit(tok[len]) ||
874 tok[len] == '.' || tok[len] == '_' || tok[len] == '-' ||
875 tok[len] == '+') && len < G_LLVM_NAMELEN - 1)
877 bcopy(tok, name, len);
883 llvm_textconf_decode(u_char *data, int buflen, struct g_llvm_metadata *md)
885 struct g_llvm_vg *vg;
888 char name[G_LLVM_NAMELEN];
889 char uuid[G_LLVM_UUIDLEN];
892 if (buf == NULL || *buf == '\0')
895 tok = strsep(&buf, "\n");
898 len = llvm_grab_name(name, tok);
902 /* check too see if the vg has already been loaded off another disk */
903 LIST_FOREACH(vg, &vg_list, vg_next) {
904 if (strcmp(vg->vg_name, name) == 0) {
906 /* grab the volume group uuid */
907 while ((tok = strsep(&buf, "\n")) != NULL) {
908 if (strstr(tok, "{"))
910 if (strstr(tok, "=")) {
912 GRAB_STR("id", v, tok, uuid,
916 if (strcmp(vg->vg_uuid, uuid) == 0) {
921 /* XXX different volume group with name clash! */
923 "%s already exists, volume group not loaded", name);
928 vg = malloc(sizeof(*vg), M_GLLVM, M_NOWAIT|M_ZERO);
932 strncpy(vg->vg_name, name, sizeof(vg->vg_name));
933 LIST_INIT(&vg->vg_pvs);
934 LIST_INIT(&vg->vg_lvs);
936 #define VOL_FOREACH(func, tok, buf, p) \
937 while ((tok = strsep(buf, "\n")) != NULL) { \
938 if (strstr(tok, "{")) { \
942 if (strstr(tok, "}")) \
946 while ((tok = strsep(&buf, "\n")) != NULL) {
947 if (strcmp(tok, "physical_volumes {") == 0) {
948 VOL_FOREACH(llvm_textconf_decode_pv, tok, &buf, vg);
951 if (strcmp(tok, "logical_volumes {") == 0) {
952 VOL_FOREACH(llvm_textconf_decode_lv, tok, &buf, vg);
955 if (strstr(tok, "{")) {
956 G_LLVM_DEBUG(2, "unknown section %s", tok);
960 /* parse 'key = value' lines */
961 if (strstr(tok, "=")) {
963 GRAB_STR("id", v, tok, vg->vg_uuid, sizeof(vg->vg_uuid));
964 GRAB_INT("extent_size", v, tok, vg->vg_extentsize);
969 if (vg->vg_extentsize == 0)
973 LIST_INSERT_HEAD(&vg_list, vg, vg_next);
974 G_LLVM_DEBUG(3, "vg: name=%s uuid=%s", vg->vg_name, vg->vg_uuid);
984 llvm_textconf_decode_pv(char **buf, char *tok, struct g_llvm_vg *vg)
986 struct g_llvm_pv *pv;
990 if (*buf == NULL || **buf == '\0')
993 pv = malloc(sizeof(*pv), M_GLLVM, M_NOWAIT|M_ZERO);
1001 len = llvm_grab_name(pv->pv_name, tok);
1005 while ((tok = strsep(buf, "\n")) != NULL) {
1006 if (strstr(tok, "{"))
1009 if (strstr(tok, "}"))
1012 /* parse 'key = value' lines */
1013 if (strstr(tok, "=")) {
1015 GRAB_STR("id", v, tok, pv->pv_uuid, sizeof(pv->pv_uuid));
1016 GRAB_INT("pe_start", v, tok, pv->pv_start);
1017 GRAB_INT("pe_count", v, tok, pv->pv_count);
1023 /* basic checking */
1024 if (pv->pv_count == 0)
1027 LIST_INSERT_HEAD(&vg->vg_pvs, pv, pv_next);
1028 G_LLVM_DEBUG(3, "pv: name=%s uuid=%s", pv->pv_name, pv->pv_uuid);
1037 llvm_textconf_decode_lv(char **buf, char *tok, struct g_llvm_vg *vg)
1039 struct g_llvm_lv *lv;
1040 struct g_llvm_segment *sg;
1044 if (*buf == NULL || **buf == '\0')
1047 lv = malloc(sizeof(*lv), M_GLLVM, M_NOWAIT|M_ZERO);
1052 LIST_INIT(&lv->lv_segs);
1056 len = llvm_grab_name(lv->lv_name, tok);
1060 while ((tok = strsep(buf, "\n")) != NULL) {
1061 if (strstr(tok, "{")) {
1062 if (strstr(tok, "segment")) {
1063 llvm_textconf_decode_sg(buf, tok, lv);
1066 /* unexpected section */
1070 if (strstr(tok, "}"))
1073 /* parse 'key = value' lines */
1074 if (strstr(tok, "=")) {
1076 GRAB_STR("id", v, tok, lv->lv_uuid, sizeof(lv->lv_uuid));
1077 GRAB_INT("segment_count", v, tok, lv->lv_sgcount);
1083 if (lv->lv_sgcount == 0 || lv->lv_sgcount != lv->lv_numsegs)
1084 /* zero or incomplete segment list */
1087 /* Optimize for only one segment on the pv */
1088 lv->lv_firstsg = LIST_FIRST(&lv->lv_segs);
1089 LIST_INSERT_HEAD(&vg->vg_lvs, lv, lv_next);
1090 G_LLVM_DEBUG(3, "lv: name=%s uuid=%s", lv->lv_name, lv->lv_uuid);
1094 while ((sg = LIST_FIRST(&lv->lv_segs)) != NULL) {
1095 LIST_REMOVE(sg, sg_next);
1103 llvm_textconf_decode_sg(char **buf, char *tok, struct g_llvm_lv *lv)
1105 struct g_llvm_segment *sg;
1109 if (*buf == NULL || **buf == '\0')
1112 sg = malloc(sizeof(*sg), M_GLLVM, M_NOWAIT|M_ZERO);
1116 while ((tok = strsep(buf, "\n")) != NULL) {
1117 /* only a single linear stripe is supported */
1118 if (strstr(tok, "stripe_count")) {
1120 GRAB_INT("stripe_count", v, tok, count);
1125 if (strstr(tok, "{"))
1128 if (strstr(tok, "}"))
1131 if (strcmp(tok, "stripes = [") == 0) {
1132 tok = strsep(buf, "\n");
1138 goto bad; /* missing open quotes */
1139 v = strsep(&tok, "\"");
1141 goto bad; /* missing close quotes */
1142 strncpy(sg->sg_pvname, v, sizeof(sg->sg_pvname));
1144 goto bad; /* missing comma for stripe */
1147 sg->sg_pvstart = strtol(tok, &v, 10);
1149 /* strtol did not eat any of the buffer */
1155 /* parse 'key = value' lines */
1156 if (strstr(tok, "=")) {
1158 GRAB_INT("start_extent", v, tok, sg->sg_start);
1159 GRAB_INT("extent_count", v, tok, sg->sg_count);
1165 /* basic checking */
1166 if (count != 1 || sg->sg_count == 0)
1169 sg->sg_end = sg->sg_start + sg->sg_count - 1;
1171 lv->lv_extentcount += sg->sg_count;
1172 LIST_INSERT_HEAD(&lv->lv_segs, sg, sg_next);
1183 static struct g_class g_llvm_class = {
1184 .name = G_LLVM_CLASS_NAME,
1185 .version = G_VERSION,
1186 .init = g_llvm_init,
1187 .taste = g_llvm_taste,
1188 .destroy_geom = g_llvm_destroy_geom
1191 DECLARE_GEOM_CLASS(g_llvm_class, g_linux_lvm);