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 SYSCTL_UINT(_kern_geom_linux_lvm, OID_AUTO, debug, CTLFLAG_RWTUN, &g_llvm_debug, 0,
85 LIST_HEAD(, g_llvm_vg) vg_list;
88 * Called to notify geom when it's been opened, and for what intent
91 g_llvm_access(struct g_provider *pp, int dr, int dw, int de)
98 KASSERT(pp != NULL, ("%s: NULL provider", __func__));
100 KASSERT(gp != NULL, ("%s: NULL geom", __func__));
104 /* It seems that .access can be called with negative dr,dw,dx
105 * in this case but I want to check for myself */
106 G_LLVM_DEBUG(0, "access(%d, %d, %d) for %s",
107 dr, dw, de, pp->name);
109 /* This should only happen when geom is withered so
110 * allow only negative requests */
111 KASSERT(dr <= 0 && dw <= 0 && de <= 0,
112 ("%s: Positive access for %s", __func__, pp->name));
113 if (pp->acr + dr == 0 && pp->acw + dw == 0 && pp->ace + de == 0)
115 "Device %s definitely destroyed", pp->name);
119 /* Grab an exclusive bit to propagate on our consumers on first open */
120 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)
122 /* ... drop it on close */
123 if (pp->acr + dr == 0 && pp->acw + dw == 0 && pp->ace + de == 0)
127 LIST_FOREACH(c, &gp->consumer, consumer) {
128 KASSERT(c != NULL, ("%s: consumer is NULL", __func__));
129 error = g_access(c, dr, dw, de);
131 struct g_consumer *c2;
133 /* Backout earlier changes */
134 LIST_FOREACH(c2, &gp->consumer, consumer) {
135 if (c2 == c) /* all eariler components fixed */
137 g_access(c2, -dr, -dw, -de);
146 * Dismantle bio_queue and destroy its components
149 bioq_dismantle(struct bio_queue_head *bq)
153 for (b = bioq_first(bq); b != NULL; b = bioq_first(bq)) {
161 * Can't use standard handler because one requested IO may
162 * fork into additional data IOs
165 g_llvm_done(struct bio *b)
167 struct bio *parent_b;
169 parent_b = b->bio_parent;
171 if (b->bio_error != 0) {
172 G_LLVM_DEBUG(0, "Error %d for offset=%ju, length=%ju on %s",
173 b->bio_error, b->bio_offset, b->bio_length,
175 if (parent_b->bio_error == 0)
176 parent_b->bio_error = b->bio_error;
179 parent_b->bio_inbed++;
180 parent_b->bio_completed += b->bio_completed;
182 if (parent_b->bio_children == parent_b->bio_inbed) {
183 parent_b->bio_completed = parent_b->bio_length;
184 g_io_deliver(parent_b, parent_b->bio_error);
190 g_llvm_start(struct bio *bp)
192 struct g_provider *pp;
193 struct g_llvm_vg *vg;
194 struct g_llvm_pv *pv;
195 struct g_llvm_lv *lv;
196 struct g_llvm_segment *sg;
198 struct bio_queue_head bq;
200 off_t offset, length;
206 vg = pp->geom->softc;
208 switch (bp->bio_cmd) {
212 /* XXX BIO_GETATTR allowed? */
215 g_io_deliver(bp, EOPNOTSUPP);
221 chunk_size = vg->vg_extentsize;
223 offset = bp->bio_offset; /* virtual offset and length */
224 length = bp->bio_length;
227 size_t chunk_index, in_chunk_offset, in_chunk_length;
230 cb = g_clone_bio(bp);
233 if (bp->bio_error == 0)
234 bp->bio_error = ENOMEM;
235 g_io_deliver(bp, bp->bio_error);
239 /* get the segment and the pv */
240 if (lv->lv_sgcount == 1) {
241 /* skip much of the calculations for a single sg */
244 in_chunk_length = length;
247 cb->bio_offset = offset + sg->sg_pvoffset;
249 chunk_index = offset / chunk_size; /* round downwards */
250 in_chunk_offset = offset % chunk_size;
252 min(length, chunk_size - in_chunk_offset);
254 /* XXX could be faster */
255 LIST_FOREACH(sg, &lv->lv_segs, sg_next) {
256 if (chunk_index >= sg->sg_start &&
257 chunk_index <= sg->sg_end) {
258 /* adjust chunk index for sg start */
259 chunk_index -= sg->sg_start;
265 (off_t)chunk_index * (off_t)chunk_size
266 + in_chunk_offset + sg->sg_pvoffset;
269 KASSERT(pv != NULL, ("Can't find PV for chunk %zu",
272 cb->bio_to = pv->pv_gprov;
273 cb->bio_done = g_llvm_done;
274 cb->bio_length = in_chunk_length;
276 cb->bio_caller1 = pv;
277 bioq_disksort(&bq, cb);
280 "Mapped %s(%ju, %ju) on %s to %zu(%zu,%zu) @ %s:%ju",
281 bp->bio_cmd == BIO_READ ? "R" : "W",
282 offset, length, lv->lv_name,
283 chunk_index, in_chunk_offset, in_chunk_length,
284 pv->pv_name, cb->bio_offset);
286 addr += in_chunk_length;
287 length -= in_chunk_length;
288 offset += in_chunk_length;
291 /* Fire off bio's here */
293 for (cb = bioq_first(&bq); cb != NULL; cb = bioq_first(&bq)) {
294 bioq_remove(&bq, cb);
295 pv = cb->bio_caller1;
296 cb->bio_caller1 = NULL;
297 G_LLVM_DEBUG(6, "firing bio to %s, offset=%ju, length=%ju",
298 cb->bio_to->name, cb->bio_offset, cb->bio_length);
299 g_io_request(cb, pv->pv_gcons);
302 if (count == 0) { /* We handled everything locally */
303 bp->bio_completed = bp->bio_length;
309 g_llvm_remove_disk(struct g_llvm_vg *vg, struct g_consumer *cp)
311 struct g_llvm_pv *pv;
312 struct g_llvm_lv *lv;
313 struct g_llvm_segment *sg;
316 KASSERT(cp != NULL, ("Non-valid disk in %s.", __func__));
317 pv = (struct g_llvm_pv *)cp->private;
319 G_LLVM_DEBUG(0, "Disk %s removed from %s.", cp->provider->name,
322 LIST_FOREACH(lv, &vg->vg_lvs, lv_next) {
323 /* Find segments that map to this disk */
325 LIST_FOREACH(sg, &lv->lv_segs, sg_next) {
326 if (sg->sg_pv == pv) {
334 G_LLVM_DEBUG(0, "Device %s removed.",
336 g_wither_provider(lv->lv_gprov, ENXIO);
341 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
342 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
344 g_destroy_consumer(cp);
348 g_llvm_orphan(struct g_consumer *cp)
350 struct g_llvm_vg *vg;
359 g_llvm_remove_disk(vg, cp);
360 g_llvm_destroy(vg, 1);
364 g_llvm_activate_lv(struct g_llvm_vg *vg, struct g_llvm_lv *lv)
367 struct g_provider *pp;
371 KASSERT(lv->lv_sgactive == lv->lv_sgcount, ("segment missing"));
374 pp = g_new_providerf(gp, "linux_lvm/%s-%s", vg->vg_name, lv->lv_name);
375 pp->mediasize = vg->vg_extentsize * (off_t)lv->lv_extentcount;
376 pp->sectorsize = vg->vg_sectorsize;
377 g_error_provider(pp, 0);
381 G_LLVM_DEBUG(1, "Created %s, %juM", pp->name,
382 pp->mediasize / (1024*1024));
388 g_llvm_add_disk(struct g_llvm_vg *vg, struct g_provider *pp, char *uuid)
391 struct g_consumer *cp, *fcp;
392 struct g_llvm_pv *pv;
393 struct g_llvm_lv *lv;
394 struct g_llvm_segment *sg;
399 LIST_FOREACH(pv, &vg->vg_pvs, pv_next) {
400 if (strcmp(pv->pv_uuid, uuid) == 0)
401 break; /* found it */
404 G_LLVM_DEBUG(3, "uuid %s not found in pv list", uuid);
407 if (pv->pv_gprov != NULL) {
408 G_LLVM_DEBUG(0, "disk %s already initialised in %s",
409 pv->pv_name, vg->vg_name);
413 pv->pv_start *= vg->vg_sectorsize;
415 fcp = LIST_FIRST(&gp->consumer);
417 cp = g_new_consumer(gp);
418 error = g_attach(cp, pp);
419 G_LLVM_DEBUG(1, "Attached %s to %s at offset %ju",
420 pp->name, pv->pv_name, pv->pv_start);
423 G_LLVM_DEBUG(0, "cannot attach %s to %s",
424 pp->name, vg->vg_name);
425 g_destroy_consumer(cp);
430 if (fcp->provider->sectorsize != pp->sectorsize) {
431 G_LLVM_DEBUG(0, "Provider %s of %s has invalid "
432 "sector size (%d)", pp->name, vg->vg_name,
436 if (fcp->acr > 0 || fcp->acw || fcp->ace > 0) {
437 /* Replicate access permissions from first "live"
438 * consumer to the new one */
439 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace);
442 g_destroy_consumer(cp);
452 LIST_FOREACH(lv, &vg->vg_lvs, lv_next) {
453 /* Find segments that map to this disk */
454 LIST_FOREACH(sg, &lv->lv_segs, sg_next) {
455 if (strcmp(sg->sg_pvname, pv->pv_name) == 0) {
456 /* avtivate the segment */
457 KASSERT(sg->sg_pv == NULL,
458 ("segment already mapped"));
460 (off_t)sg->sg_pvstart * vg->vg_extentsize
465 G_LLVM_DEBUG(2, "%s: %d to %d @ %s:%d"
466 " offset %ju sector %ju",
467 lv->lv_name, sg->sg_start, sg->sg_end,
468 sg->sg_pvname, sg->sg_pvstart,
470 sg->sg_pvoffset / vg->vg_sectorsize);
473 /* Activate any lvs waiting on this disk */
474 if (lv->lv_gprov == NULL && lv->lv_sgactive == lv->lv_sgcount) {
475 error = g_llvm_activate_lv(vg, lv);
484 g_llvm_init(struct g_class *mp)
490 g_llvm_free_vg(struct g_llvm_vg *vg)
492 struct g_llvm_pv *pv;
493 struct g_llvm_lv *lv;
494 struct g_llvm_segment *sg;
496 /* Free all the structures */
497 while ((pv = LIST_FIRST(&vg->vg_pvs)) != NULL) {
498 LIST_REMOVE(pv, pv_next);
501 while ((lv = LIST_FIRST(&vg->vg_lvs)) != NULL) {
502 while ((sg = LIST_FIRST(&lv->lv_segs)) != NULL) {
503 LIST_REMOVE(sg, sg_next);
506 LIST_REMOVE(lv, lv_next);
509 LIST_REMOVE(vg, vg_next);
514 g_llvm_taste_orphan(struct g_consumer *cp)
517 KASSERT(1 == 0, ("%s called while tasting %s.", __func__,
518 cp->provider->name));
521 static struct g_geom *
522 g_llvm_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
524 struct g_consumer *cp;
526 struct g_llvm_label ll;
527 struct g_llvm_metadata md;
528 struct g_llvm_vg *vg;
531 bzero(&md, sizeof(md));
534 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
535 gp = g_new_geomf(mp, "linux_lvm:taste");
536 /* This orphan function should be never called. */
537 gp->orphan = g_llvm_taste_orphan;
538 cp = g_new_consumer(gp);
540 error = g_llvm_read_label(cp, &ll);
542 error = g_llvm_read_md(cp, &md, &ll);
544 g_destroy_consumer(cp);
550 if (vg->vg_geom == NULL) {
551 /* new volume group */
552 gp = g_new_geomf(mp, "%s", vg->vg_name);
553 gp->start = g_llvm_start;
554 gp->spoiled = g_llvm_orphan;
555 gp->orphan = g_llvm_orphan;
556 gp->access = g_llvm_access;
557 vg->vg_sectorsize = pp->sectorsize;
558 vg->vg_extentsize *= vg->vg_sectorsize;
561 G_LLVM_DEBUG(1, "Created volume %s, extent size %zuK",
562 vg->vg_name, vg->vg_extentsize / 1024);
565 /* initialise this disk in the volume group */
566 g_llvm_add_disk(vg, pp, ll.ll_uuid);
567 return (vg->vg_geom);
571 g_llvm_destroy(struct g_llvm_vg *vg, int force)
573 struct g_provider *pp;
581 LIST_FOREACH(pp, &gp->provider, provider) {
582 if (pp->acr != 0 || pp->acw != 0 || pp->ace != 0) {
583 G_LLVM_DEBUG(1, "Device %s is still open (r%dw%de%d)",
584 pp->name, pp->acr, pp->acw, pp->ace);
590 g_llvm_free_vg(gp->softc);
592 g_wither_geom(gp, ENXIO);
597 g_llvm_destroy_geom(struct gctl_req *req __unused, struct g_class *mp __unused,
600 struct g_llvm_vg *vg;
603 return (g_llvm_destroy(vg, 0));
607 g_llvm_read_label(struct g_consumer *cp, struct g_llvm_label *ll)
609 struct g_provider *pp;
615 /* The LVM label is stored on the first four sectors */
616 error = g_access(cp, 1, 0, 0);
621 buf = g_read_data(cp, 0, pp->sectorsize * 4, &error);
623 g_access(cp, -1, 0, 0);
625 G_LLVM_DEBUG(1, "Cannot read metadata from %s (error=%d)",
630 /* Search the four sectors for the LVM label. */
631 for (i = 0; i < 4; i++) {
632 error = llvm_label_decode(&buf[i * pp->sectorsize], ll, i);
634 break; /* found it */
641 g_llvm_read_md(struct g_consumer *cp, struct g_llvm_metadata *md,
642 struct g_llvm_label *ll)
644 struct g_provider *pp;
651 error = g_access(cp, 1, 0, 0);
656 buf = g_read_data(cp, ll->ll_md_offset, pp->sectorsize, &error);
658 g_access(cp, -1, 0, 0);
660 G_LLVM_DEBUG(0, "Cannot read metadata from %s (error=%d)",
661 cp->provider->name, error);
665 error = llvm_md_decode(buf, md, ll);
671 G_LLVM_DEBUG(1, "reading LVM2 config @ %s:%ju", pp->name,
672 ll->ll_md_offset + md->md_reloffset);
673 error = g_access(cp, 1, 0, 0);
678 /* round up to the nearest sector */
679 size = md->md_relsize +
680 (pp->sectorsize - md->md_relsize % pp->sectorsize);
681 buf = g_read_data(cp, ll->ll_md_offset + md->md_reloffset, size, &error);
683 g_access(cp, -1, 0, 0);
685 G_LLVM_DEBUG(0, "Cannot read LVM2 config from %s (error=%d)",
689 buf[md->md_relsize] = '\0';
690 G_LLVM_DEBUG(10, "LVM config:\n%s\n", buf);
691 error = llvm_textconf_decode(buf, md->md_relsize, md);
698 llvm_label_decode(const u_char *data, struct g_llvm_label *ll, int sector)
704 if (bcmp("LABELONE", data , 8) != 0)
707 /* We only support LVM2 text format */
708 if (bcmp("LVM2 001", data + 24, 8) != 0) {
709 G_LLVM_DEBUG(0, "Unsupported LVM format");
713 ll->ll_sector = le64dec(data + 8);
714 ll->ll_crc = le32dec(data + 16);
715 ll->ll_offset = le32dec(data + 20);
717 if (ll->ll_sector != sector) {
718 G_LLVM_DEBUG(0, "Expected sector %ju, found at %d",
719 ll->ll_sector, sector);
725 * convert the binary uuid to string format, the format is
726 * xxxxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxxxx (6-4-4-4-4-4-6)
729 bcopy(data + off, uuid, 6);
733 for (int i = 0; i < 5; i++) {
734 bcopy(data + off, uuid, 4);
739 bcopy(data + off, uuid, 6);
744 ll->ll_size = le64dec(data + off);
746 ll->ll_pestart = le64dec(data + off);
749 /* Only one data section is supported */
750 if (le64dec(data + off) != 0) {
751 G_LLVM_DEBUG(0, "Only one data section supported");
756 ll->ll_md_offset = le64dec(data + off);
758 ll->ll_md_size = le64dec(data + off);
761 G_LLVM_DEBUG(1, "LVM metadata: offset=%ju, size=%ju", ll->ll_md_offset,
764 /* Only one data section is supported */
765 if (le64dec(data + off) != 0) {
766 G_LLVM_DEBUG(0, "Only one metadata section supported");
770 G_LLVM_DEBUG(2, "label uuid=%s", ll->ll_uuid);
771 G_LLVM_DEBUG(2, "sector=%ju, crc=%u, offset=%u, size=%ju, pestart=%ju",
772 ll->ll_sector, ll->ll_crc, ll->ll_offset, ll->ll_size,
779 llvm_md_decode(const u_char *data, struct g_llvm_metadata *md,
780 struct g_llvm_label *ll)
786 md->md_csum = le32dec(data + off);
788 bcopy(data + off, magic, 16);
790 md->md_version = le32dec(data + off);
792 md->md_start = le64dec(data + off);
794 md->md_size = le64dec(data + off);
797 if (bcmp(G_LLVM_MAGIC, magic, 16) != 0) {
798 G_LLVM_DEBUG(0, "Incorrect md magic number");
801 if (md->md_version != 1) {
802 G_LLVM_DEBUG(0, "Incorrect md version number (%u)",
806 if (md->md_start != ll->ll_md_offset) {
807 G_LLVM_DEBUG(0, "Incorrect md offset (%ju)", md->md_start);
811 /* Aparently only one is ever returned */
812 md->md_reloffset = le64dec(data + off);
814 md->md_relsize = le64dec(data + off);
815 off += 16; /* XXX skipped checksum */
817 if (le64dec(data + off) != 0) {
818 G_LLVM_DEBUG(0, "Only one reloc supported");
822 G_LLVM_DEBUG(3, "reloc: offset=%ju, size=%ju",
823 md->md_reloffset, md->md_relsize);
824 G_LLVM_DEBUG(3, "md: version=%u, start=%ju, size=%ju",
825 md->md_version, md->md_start, md->md_size);
830 #define GRAB_INT(key, tok1, tok2, v) \
831 if (tok1 && tok2 && strncmp(tok1, key, sizeof(key)) == 0) { \
832 v = strtol(tok2, &tok1, 10); \
834 /* strtol did not eat any of the buffer */ \
839 #define GRAB_STR(key, tok1, tok2, v, len) \
840 if (tok1 && tok2 && strncmp(tok1, key, sizeof(key)) == 0) { \
841 strsep(&tok2, "\""); \
844 tok1 = strsep(&tok2, "\""); \
847 strncpy(v, tok1, len); \
851 #define SPLIT(key, value, str) \
852 key = strsep(&value, str); \
853 /* strip trailing whitespace on the key */ \
854 for (char *t = key; *t != '\0'; t++) \
861 llvm_grab_name(char *name, const char *tok)
870 if (strcmp(tok, ".") == 0 || strcmp(tok, "..") == 0)
872 while (tok[len] && (isalpha(tok[len]) || isdigit(tok[len]) ||
873 tok[len] == '.' || tok[len] == '_' || tok[len] == '-' ||
874 tok[len] == '+') && len < G_LLVM_NAMELEN - 1)
876 bcopy(tok, name, len);
882 llvm_textconf_decode(u_char *data, int buflen, struct g_llvm_metadata *md)
884 struct g_llvm_vg *vg;
887 char name[G_LLVM_NAMELEN];
888 char uuid[G_LLVM_UUIDLEN];
891 if (buf == NULL || *buf == '\0')
894 tok = strsep(&buf, "\n");
897 len = llvm_grab_name(name, tok);
901 /* check too see if the vg has already been loaded off another disk */
902 LIST_FOREACH(vg, &vg_list, vg_next) {
903 if (strcmp(vg->vg_name, name) == 0) {
905 /* grab the volume group uuid */
906 while ((tok = strsep(&buf, "\n")) != NULL) {
907 if (strstr(tok, "{"))
909 if (strstr(tok, "=")) {
911 GRAB_STR("id", v, tok, uuid,
915 if (strcmp(vg->vg_uuid, uuid) == 0) {
920 /* XXX different volume group with name clash! */
922 "%s already exists, volume group not loaded", name);
927 vg = malloc(sizeof(*vg), M_GLLVM, M_NOWAIT|M_ZERO);
931 strncpy(vg->vg_name, name, sizeof(vg->vg_name));
932 LIST_INIT(&vg->vg_pvs);
933 LIST_INIT(&vg->vg_lvs);
935 #define VOL_FOREACH(func, tok, buf, p) \
936 while ((tok = strsep(buf, "\n")) != NULL) { \
937 if (strstr(tok, "{")) { \
941 if (strstr(tok, "}")) \
945 while ((tok = strsep(&buf, "\n")) != NULL) {
946 if (strcmp(tok, "physical_volumes {") == 0) {
947 VOL_FOREACH(llvm_textconf_decode_pv, tok, &buf, vg);
950 if (strcmp(tok, "logical_volumes {") == 0) {
951 VOL_FOREACH(llvm_textconf_decode_lv, tok, &buf, vg);
954 if (strstr(tok, "{")) {
955 G_LLVM_DEBUG(2, "unknown section %s", tok);
959 /* parse 'key = value' lines */
960 if (strstr(tok, "=")) {
962 GRAB_STR("id", v, tok, vg->vg_uuid, sizeof(vg->vg_uuid));
963 GRAB_INT("extent_size", v, tok, vg->vg_extentsize);
968 if (vg->vg_extentsize == 0)
972 LIST_INSERT_HEAD(&vg_list, vg, vg_next);
973 G_LLVM_DEBUG(3, "vg: name=%s uuid=%s", vg->vg_name, vg->vg_uuid);
983 llvm_textconf_decode_pv(char **buf, char *tok, struct g_llvm_vg *vg)
985 struct g_llvm_pv *pv;
989 if (*buf == NULL || **buf == '\0')
992 pv = malloc(sizeof(*pv), M_GLLVM, M_NOWAIT|M_ZERO);
1000 len = llvm_grab_name(pv->pv_name, tok);
1004 while ((tok = strsep(buf, "\n")) != NULL) {
1005 if (strstr(tok, "{"))
1008 if (strstr(tok, "}"))
1011 /* parse 'key = value' lines */
1012 if (strstr(tok, "=")) {
1014 GRAB_STR("id", v, tok, pv->pv_uuid, sizeof(pv->pv_uuid));
1015 GRAB_INT("pe_start", v, tok, pv->pv_start);
1016 GRAB_INT("pe_count", v, tok, pv->pv_count);
1022 /* basic checking */
1023 if (pv->pv_count == 0)
1026 LIST_INSERT_HEAD(&vg->vg_pvs, pv, pv_next);
1027 G_LLVM_DEBUG(3, "pv: name=%s uuid=%s", pv->pv_name, pv->pv_uuid);
1036 llvm_textconf_decode_lv(char **buf, char *tok, struct g_llvm_vg *vg)
1038 struct g_llvm_lv *lv;
1039 struct g_llvm_segment *sg;
1043 if (*buf == NULL || **buf == '\0')
1046 lv = malloc(sizeof(*lv), M_GLLVM, M_NOWAIT|M_ZERO);
1051 LIST_INIT(&lv->lv_segs);
1055 len = llvm_grab_name(lv->lv_name, tok);
1059 while ((tok = strsep(buf, "\n")) != NULL) {
1060 if (strstr(tok, "{")) {
1061 if (strstr(tok, "segment")) {
1062 llvm_textconf_decode_sg(buf, tok, lv);
1065 /* unexpected section */
1069 if (strstr(tok, "}"))
1072 /* parse 'key = value' lines */
1073 if (strstr(tok, "=")) {
1075 GRAB_STR("id", v, tok, lv->lv_uuid, sizeof(lv->lv_uuid));
1076 GRAB_INT("segment_count", v, tok, lv->lv_sgcount);
1082 if (lv->lv_sgcount == 0 || lv->lv_sgcount != lv->lv_numsegs)
1083 /* zero or incomplete segment list */
1086 /* Optimize for only one segment on the pv */
1087 lv->lv_firstsg = LIST_FIRST(&lv->lv_segs);
1088 LIST_INSERT_HEAD(&vg->vg_lvs, lv, lv_next);
1089 G_LLVM_DEBUG(3, "lv: name=%s uuid=%s", lv->lv_name, lv->lv_uuid);
1093 while ((sg = LIST_FIRST(&lv->lv_segs)) != NULL) {
1094 LIST_REMOVE(sg, sg_next);
1102 llvm_textconf_decode_sg(char **buf, char *tok, struct g_llvm_lv *lv)
1104 struct g_llvm_segment *sg;
1108 if (*buf == NULL || **buf == '\0')
1111 sg = malloc(sizeof(*sg), M_GLLVM, M_NOWAIT|M_ZERO);
1115 while ((tok = strsep(buf, "\n")) != NULL) {
1116 /* only a single linear stripe is supported */
1117 if (strstr(tok, "stripe_count")) {
1119 GRAB_INT("stripe_count", v, tok, count);
1124 if (strstr(tok, "{"))
1127 if (strstr(tok, "}"))
1130 if (strcmp(tok, "stripes = [") == 0) {
1131 tok = strsep(buf, "\n");
1137 goto bad; /* missing open quotes */
1138 v = strsep(&tok, "\"");
1140 goto bad; /* missing close quotes */
1141 strncpy(sg->sg_pvname, v, sizeof(sg->sg_pvname));
1143 goto bad; /* missing comma for stripe */
1146 sg->sg_pvstart = strtol(tok, &v, 10);
1148 /* strtol did not eat any of the buffer */
1154 /* parse 'key = value' lines */
1155 if (strstr(tok, "=")) {
1157 GRAB_INT("start_extent", v, tok, sg->sg_start);
1158 GRAB_INT("extent_count", v, tok, sg->sg_count);
1164 /* basic checking */
1165 if (count != 1 || sg->sg_count == 0)
1168 sg->sg_end = sg->sg_start + sg->sg_count - 1;
1170 lv->lv_extentcount += sg->sg_count;
1171 LIST_INSERT_HEAD(&lv->lv_segs, sg, sg_next);
1182 static struct g_class g_llvm_class = {
1183 .name = G_LLVM_CLASS_NAME,
1184 .version = G_VERSION,
1185 .init = g_llvm_init,
1186 .taste = g_llvm_taste,
1187 .destroy_geom = g_llvm_destroy_geom
1190 DECLARE_GEOM_CLASS(g_llvm_class, g_linux_lvm);