From 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:29:51 +0200 Subject: Adding upstream version 2.06. Signed-off-by: Daniel Baumann --- grub-core/disk/lvm.c | 1091 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1091 insertions(+) create mode 100644 grub-core/disk/lvm.c (limited to 'grub-core/disk/lvm.c') diff --git a/grub-core/disk/lvm.c b/grub-core/disk/lvm.c new file mode 100644 index 0000000..8257159 --- /dev/null +++ b/grub-core/disk/lvm.c @@ -0,0 +1,1091 @@ +/* lvm.c - module to read Logical Volumes. */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2006,2007,2008,2009,2011 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef GRUB_UTIL +#include +#include +#endif + +GRUB_MOD_LICENSE ("GPLv3+"); + +struct cache_lv +{ + struct grub_diskfilter_lv *lv; + char *cache_pool; + char *origin; + struct cache_lv *next; +}; + + +/* Go the string STR and return the number after STR. *P will point + at the number. In case STR is not found, *P will be NULL and the + return value will be 0. */ +static grub_uint64_t +grub_lvm_getvalue (const char ** const p, const char *str) +{ + *p = grub_strstr (*p, str); + if (! *p) + return 0; + *p += grub_strlen (str); + return grub_strtoull (*p, p, 10); +} + +#if 0 +static int +grub_lvm_checkvalue (char **p, char *str, char *tmpl) +{ + int tmpllen = grub_strlen (tmpl); + *p = grub_strstr (*p, str); + if (! *p) + return 0; + *p += grub_strlen (str); + if (**p != '"') + return 0; + return (grub_memcmp (*p + 1, tmpl, tmpllen) == 0 && (*p)[tmpllen + 1] == '"'); +} +#endif + +static int +grub_lvm_check_flag (const char *p, const char *str, const char *flag) +{ + grub_size_t len_str = grub_strlen (str), len_flag = grub_strlen (flag); + while (1) + { + const char *q; + p = grub_strstr (p, str); + if (! p) + return 0; + p += len_str; + if (grub_memcmp (p, " = [", sizeof (" = [") - 1) != 0) + continue; + q = p + sizeof (" = [") - 1; + while (1) + { + while (grub_isspace (*q)) + q++; + if (*q != '"') + return 0; + q++; + if (grub_memcmp (q, flag, len_flag) == 0 && q[len_flag] == '"') + return 1; + while (*q != '"') + q++; + q++; + if (*q == ']') + return 0; + q++; + } + } +} + +static void +grub_lvm_free_cache_lvs (struct cache_lv *cache_lvs) +{ + struct cache_lv *cache; + + while ((cache = cache_lvs)) + { + cache_lvs = cache_lvs->next; + + if (cache->lv) + { + unsigned int i; + + for (i = 0; i < cache->lv->segment_count; ++i) + if (cache->lv->segments) + grub_free (cache->lv->segments[i].nodes); + grub_free (cache->lv->segments); + grub_free (cache->lv->fullname); + grub_free (cache->lv->idname); + grub_free (cache->lv->name); + } + grub_free (cache->lv); + grub_free (cache->origin); + grub_free (cache->cache_pool); + grub_free (cache); + } +} + +static struct grub_diskfilter_vg * +grub_lvm_detect (grub_disk_t disk, + struct grub_diskfilter_pv_id *id, + grub_disk_addr_t *start_sector) +{ + grub_err_t err; + grub_uint64_t mda_offset, mda_size; + grub_size_t ptr; + char buf[GRUB_LVM_LABEL_SIZE]; + char vg_id[GRUB_LVM_ID_STRLEN+1]; + char pv_id[GRUB_LVM_ID_STRLEN+1]; + char *metadatabuf, *mda_end, *vgname; + const char *p, *q; + struct grub_lvm_label_header *lh = (struct grub_lvm_label_header *) buf; + struct grub_lvm_pv_header *pvh; + struct grub_lvm_disk_locn *dlocn; + struct grub_lvm_mda_header *mdah; + struct grub_lvm_raw_locn *rlocn; + unsigned int i, j; + grub_size_t vgname_len; + struct grub_diskfilter_vg *vg; + struct grub_diskfilter_pv *pv; + + /* Search for label. */ + for (i = 0; i < GRUB_LVM_LABEL_SCAN_SECTORS; i++) + { + err = grub_disk_read (disk, i, 0, sizeof(buf), buf); + if (err) + goto fail; + + if ((! grub_strncmp ((char *)lh->id, GRUB_LVM_LABEL_ID, + sizeof (lh->id))) + && (! grub_strncmp ((char *)lh->type, GRUB_LVM_LVM2_LABEL, + sizeof (lh->type)))) + break; + } + + /* Return if we didn't find a label. */ + if (i == GRUB_LVM_LABEL_SCAN_SECTORS) + { +#ifdef GRUB_UTIL + grub_util_info ("no LVM signature found"); +#endif + goto fail; + } + + /* + * We read a grub_lvm_pv_header and then 2 grub_lvm_disk_locns that + * immediately follow the PV header. Make sure we have space for both. + */ + if (grub_le_to_cpu32 (lh->offset_xl) >= + GRUB_LVM_LABEL_SIZE - sizeof (struct grub_lvm_pv_header) - + 2 * sizeof (struct grub_lvm_disk_locn)) + { +#ifdef GRUB_UTIL + grub_util_info ("LVM PV header/disk locations are beyond the end of the block"); +#endif + goto fail; + } + + pvh = (struct grub_lvm_pv_header *) (buf + grub_le_to_cpu32(lh->offset_xl)); + + for (i = 0, j = 0; i < GRUB_LVM_ID_LEN; i++) + { + pv_id[j++] = pvh->pv_uuid[i]; + if ((i != 1) && (i != 29) && (i % 4 == 1)) + pv_id[j++] = '-'; + } + pv_id[j] = '\0'; + + dlocn = pvh->disk_areas_xl; + + dlocn++; + /* Is it possible to have multiple data/metadata areas? I haven't + seen devices that have it. */ + if (dlocn->offset) + { + grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, + "we don't support multiple LVM data areas"); + +#ifdef GRUB_UTIL + grub_util_info ("we don't support multiple LVM data areas"); +#endif + goto fail; + } + + dlocn++; + mda_offset = grub_le_to_cpu64 (dlocn->offset); + mda_size = grub_le_to_cpu64 (dlocn->size); + + /* It's possible to have multiple copies of metadata areas, we just use the + first one. */ + + /* Allocate buffer space for the circular worst-case scenario. */ + metadatabuf = grub_calloc (2, mda_size); + if (! metadatabuf) + goto fail; + + err = grub_disk_read (disk, 0, mda_offset, mda_size, metadatabuf); + if (err) + goto fail2; + + mdah = (struct grub_lvm_mda_header *) metadatabuf; + if ((grub_strncmp ((char *)mdah->magic, GRUB_LVM_FMTT_MAGIC, + sizeof (mdah->magic))) + || (grub_le_to_cpu32 (mdah->version) != GRUB_LVM_FMTT_VERSION)) + { + grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, + "unknown LVM metadata header"); +#ifdef GRUB_UTIL + grub_util_info ("unknown LVM metadata header"); +#endif + goto fail2; + } + + rlocn = mdah->raw_locns; + if (grub_le_to_cpu64 (rlocn->offset) >= grub_le_to_cpu64 (mda_size)) + { +#ifdef GRUB_UTIL + grub_util_info ("metadata offset is beyond end of metadata area"); +#endif + goto fail2; + } + + if (grub_le_to_cpu64 (rlocn->offset) + grub_le_to_cpu64 (rlocn->size) > + grub_le_to_cpu64 (mdah->size)) + { + if (2 * mda_size < GRUB_LVM_MDA_HEADER_SIZE || + (grub_le_to_cpu64 (rlocn->offset) + grub_le_to_cpu64 (rlocn->size) - + grub_le_to_cpu64 (mdah->size) > mda_size - GRUB_LVM_MDA_HEADER_SIZE)) + { +#ifdef GRUB_UTIL + grub_util_info ("cannot copy metadata wrap in circular buffer"); +#endif + goto fail2; + } + + /* Metadata is circular. Copy the wrap in place. */ + grub_memcpy (metadatabuf + mda_size, + metadatabuf + GRUB_LVM_MDA_HEADER_SIZE, + grub_le_to_cpu64 (rlocn->offset) + + grub_le_to_cpu64 (rlocn->size) - + grub_le_to_cpu64 (mdah->size)); + } + + if (grub_add ((grub_size_t)metadatabuf, + (grub_size_t)grub_le_to_cpu64 (rlocn->offset), + &ptr)) + { + error_parsing_metadata: +#ifdef GRUB_UTIL + grub_util_info ("error parsing metadata"); +#endif + goto fail2; + } + + p = q = (char *)ptr; + + if (grub_add ((grub_size_t)metadatabuf, (grub_size_t)mda_size, &ptr)) + goto error_parsing_metadata; + + mda_end = (char *)ptr; + + while (*q != ' ' && q < mda_end) + q++; + + if (q == mda_end) + goto error_parsing_metadata; + + vgname_len = q - p; + vgname = grub_malloc (vgname_len + 1); + if (!vgname) + goto fail2; + + grub_memcpy (vgname, p, vgname_len); + vgname[vgname_len] = '\0'; + + p = grub_strstr (q, "id = \""); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("couldn't find ID"); +#endif + goto fail3; + } + p += sizeof ("id = \"") - 1; + grub_memcpy (vg_id, p, GRUB_LVM_ID_STRLEN); + vg_id[GRUB_LVM_ID_STRLEN] = '\0'; + + vg = grub_diskfilter_get_vg_by_uuid (GRUB_LVM_ID_STRLEN, vg_id); + + if (! vg) + { + struct cache_lv *cache_lvs = NULL; + + /* First time we see this volume group. We've to create the + whole volume group structure. */ + vg = grub_malloc (sizeof (*vg)); + if (! vg) + goto fail3; + vg->name = vgname; + vg->uuid = grub_malloc (GRUB_LVM_ID_STRLEN); + if (! vg->uuid) + goto fail3; + grub_memcpy (vg->uuid, vg_id, GRUB_LVM_ID_STRLEN); + vg->uuid_len = GRUB_LVM_ID_STRLEN; + + vg->extent_size = grub_lvm_getvalue (&p, "extent_size = "); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown extent size"); +#endif + goto fail4; + } + + vg->lvs = NULL; + vg->pvs = NULL; + + p = grub_strstr (p, "physical_volumes {"); + if (p) + { + p += sizeof ("physical_volumes {") - 1; + + /* Add all the pvs to the volume group. */ + while (1) + { + grub_ssize_t s; + while (grub_isspace (*p) && p < mda_end) + p++; + + if (p == mda_end) + goto fail4; + + if (*p == '}') + break; + + pv = grub_zalloc (sizeof (*pv)); + q = p; + while (*q != ' ' && q < mda_end) + q++; + + if (q == mda_end) + goto pvs_fail_noname; + + s = q - p; + pv->name = grub_malloc (s + 1); + grub_memcpy (pv->name, p, s); + pv->name[s] = '\0'; + + p = grub_strstr (p, "id = \""); + if (p == NULL) + goto pvs_fail; + p += sizeof("id = \"") - 1; + + pv->id.uuid = grub_malloc (GRUB_LVM_ID_STRLEN); + if (!pv->id.uuid) + goto pvs_fail; + grub_memcpy (pv->id.uuid, p, GRUB_LVM_ID_STRLEN); + pv->id.uuidlen = GRUB_LVM_ID_STRLEN; + + pv->start_sector = grub_lvm_getvalue (&p, "pe_start = "); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown pe_start"); +#endif + goto pvs_fail; + } + + p = grub_strchr (p, '}'); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("error parsing pe_start"); +#endif + goto pvs_fail; + } + p++; + + pv->disk = NULL; + pv->next = vg->pvs; + vg->pvs = pv; + + continue; + pvs_fail: + grub_free (pv->name); + pvs_fail_noname: + grub_free (pv); + goto fail4; + } + } + else + goto fail4; + + p = grub_strstr (p, "logical_volumes {"); + if (p) + { + p += sizeof ("logical_volumes {") - 1; + + /* And add all the lvs to the volume group. */ + while (1) + { + grub_ssize_t s; + int skip_lv = 0; + struct grub_diskfilter_lv *lv; + struct grub_diskfilter_segment *seg; + int is_pvmove; + + while (grub_isspace (*p) && p < mda_end) + p++; + + if (p == mda_end) + goto fail4; + + if (*p == '}') + break; + + lv = grub_zalloc (sizeof (*lv)); + + q = p; + while (*q != ' ' && q < mda_end) + q++; + + if (q == mda_end) + goto lvs_fail; + + s = q - p; + lv->name = grub_strndup (p, s); + if (!lv->name) + goto lvs_fail; + + { + const char *iptr; + char *optr; + + /* + * This is kind of hard to read with our safe (but rather + * baroque) math primatives, but it boils down to: + * + * sz0 = vgname_len * 2 + 1 + + * s * 2 + 1 + + * sizeof ("lvm/") - 1; + */ + grub_size_t sz0 = vgname_len, sz1 = s; + + if (grub_mul (sz0, 2, &sz0) || + grub_add (sz0, 1, &sz0) || + grub_mul (sz1, 2, &sz1) || + grub_add (sz1, 1, &sz1) || + grub_add (sz0, sz1, &sz0) || + grub_add (sz0, sizeof ("lvm/") - 1, &sz0)) + goto lvs_fail; + + lv->fullname = grub_malloc (sz0); + if (!lv->fullname) + goto lvs_fail; + + grub_memcpy (lv->fullname, "lvm/", sizeof ("lvm/") - 1); + optr = lv->fullname + sizeof ("lvm/") - 1; + for (iptr = vgname; iptr < vgname + vgname_len; iptr++) + { + *optr++ = *iptr; + if (*iptr == '-') + *optr++ = '-'; + } + *optr++ = '-'; + for (iptr = p; iptr < p + s; iptr++) + { + *optr++ = *iptr; + if (*iptr == '-') + *optr++ = '-'; + } + *optr++ = 0; + lv->idname = grub_malloc (sizeof ("lvmid/") + + 2 * GRUB_LVM_ID_STRLEN + 1); + if (!lv->idname) + goto lvs_fail; + grub_memcpy (lv->idname, "lvmid/", + sizeof ("lvmid/") - 1); + grub_memcpy (lv->idname + sizeof ("lvmid/") - 1, + vg_id, GRUB_LVM_ID_STRLEN); + lv->idname[sizeof ("lvmid/") - 1 + GRUB_LVM_ID_STRLEN] = '/'; + + p = grub_strstr (q, "id = \""); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("couldn't find ID"); +#endif + goto lvs_fail; + } + p += sizeof ("id = \"") - 1; + grub_memcpy (lv->idname + sizeof ("lvmid/") - 1 + + GRUB_LVM_ID_STRLEN + 1, + p, GRUB_LVM_ID_STRLEN); + lv->idname[sizeof ("lvmid/") - 1 + 2 * GRUB_LVM_ID_STRLEN + 1] = '\0'; + } + + lv->size = 0; + + lv->visible = grub_lvm_check_flag (p, "status", "VISIBLE"); + is_pvmove = grub_lvm_check_flag (p, "status", "PVMOVE"); + + lv->segment_count = grub_lvm_getvalue (&p, "segment_count = "); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown segment_count"); +#endif + goto lvs_fail; + } + lv->segments = grub_calloc (lv->segment_count, sizeof (*seg)); + seg = lv->segments; + + for (i = 0; i < lv->segment_count; i++) + { + + p = grub_strstr (p, "segment"); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown segment"); +#endif + goto lvs_segment_fail; + } + + seg->start_extent = grub_lvm_getvalue (&p, "start_extent = "); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown start_extent"); +#endif + goto lvs_segment_fail; + } + seg->extent_count = grub_lvm_getvalue (&p, "extent_count = "); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown extent_count"); +#endif + goto lvs_segment_fail; + } + + p = grub_strstr (p, "type = \""); + if (p == NULL) + goto lvs_segment_fail; + p += sizeof("type = \"") - 1; + + lv->size += seg->extent_count * vg->extent_size; + + if (grub_memcmp (p, "striped\"", + sizeof ("striped\"") - 1) == 0) + { + struct grub_diskfilter_node *stripe; + + seg->type = GRUB_DISKFILTER_STRIPED; + seg->node_count = grub_lvm_getvalue (&p, "stripe_count = "); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown stripe_count"); +#endif + goto lvs_segment_fail; + } + + if (seg->node_count != 1) + { + seg->stripe_size = grub_lvm_getvalue (&p, "stripe_size = "); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown stripe_size"); +#endif + goto lvs_segment_fail; + } + } + + seg->nodes = grub_calloc (seg->node_count, + sizeof (*stripe)); + stripe = seg->nodes; + + p = grub_strstr (p, "stripes = ["); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown stripes"); +#endif + goto lvs_segment_fail2; + } + p += sizeof("stripes = [") - 1; + + for (j = 0; j < seg->node_count; j++) + { + p = grub_strchr (p, '"'); + if (p == NULL) + goto lvs_segment_fail2; + q = ++p; + while (q < mda_end && *q != '"') + q++; + + if (q == mda_end) + goto lvs_segment_fail2; + + s = q - p; + + stripe->name = grub_malloc (s + 1); + if (stripe->name == NULL) + goto lvs_segment_fail2; + + grub_memcpy (stripe->name, p, s); + stripe->name[s] = '\0'; + + p = q + 1; + + stripe->start = grub_lvm_getvalue (&p, ",") + * vg->extent_size; + if (p == NULL) + { + grub_free (stripe->name); + goto lvs_segment_fail2; + } + + stripe++; + } + } + else if (grub_memcmp (p, "mirror\"", sizeof ("mirror\"") - 1) + == 0) + { + seg->type = GRUB_DISKFILTER_MIRROR; + seg->node_count = grub_lvm_getvalue (&p, "mirror_count = "); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown mirror_count"); +#endif + goto lvs_segment_fail; + } + + seg->nodes = grub_zalloc (sizeof (seg->nodes[0]) + * seg->node_count); + + p = grub_strstr (p, "mirrors = ["); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown mirrors"); +#endif + goto lvs_segment_fail2; + } + p += sizeof("mirrors = [") - 1; + + for (j = 0; j < seg->node_count; j++) + { + char *lvname; + + p = grub_strchr (p, '"'); + if (p == NULL) + goto lvs_segment_fail2; + q = ++p; + while (q < mda_end && *q != '"') + q++; + + if (q == mda_end) + goto lvs_segment_fail2; + + s = q - p; + + lvname = grub_malloc (s + 1); + if (lvname == NULL) + goto lvs_segment_fail2; + + grub_memcpy (lvname, p, s); + lvname[s] = '\0'; + seg->nodes[j].name = lvname; + p = q + 1; + } + /* Only first (original) is ok with in progress pvmove. */ + if (is_pvmove) + seg->node_count = 1; + } + else if (grub_memcmp (p, "raid", sizeof ("raid") - 1) == 0 + && ((p[sizeof ("raid") - 1] >= '4' + && p[sizeof ("raid") - 1] <= '6') + || p[sizeof ("raid") - 1] == '1') + && p[sizeof ("raidX") - 1] == '"') + { + switch (p[sizeof ("raid") - 1]) + { + case '1': + seg->type = GRUB_DISKFILTER_MIRROR; + break; + case '4': + seg->type = GRUB_DISKFILTER_RAID4; + seg->layout = GRUB_RAID_LAYOUT_LEFT_ASYMMETRIC; + break; + case '5': + seg->type = GRUB_DISKFILTER_RAID5; + seg->layout = GRUB_RAID_LAYOUT_LEFT_SYMMETRIC; + break; + case '6': + seg->type = GRUB_DISKFILTER_RAID6; + seg->layout = (GRUB_RAID_LAYOUT_RIGHT_ASYMMETRIC + | GRUB_RAID_LAYOUT_MUL_FROM_POS); + break; + } + seg->node_count = grub_lvm_getvalue (&p, "device_count = "); + + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown device_count"); +#endif + goto lvs_segment_fail; + } + + if (seg->type != GRUB_DISKFILTER_MIRROR) + { + seg->stripe_size = grub_lvm_getvalue (&p, "stripe_size = "); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown stripe_size"); +#endif + goto lvs_segment_fail; + } + } + + seg->nodes = grub_zalloc (sizeof (seg->nodes[0]) + * seg->node_count); + + p = grub_strstr (p, "raids = ["); + if (p == NULL) + { +#ifdef GRUB_UTIL + grub_util_info ("unknown raids"); +#endif + goto lvs_segment_fail2; + } + p += sizeof("raids = [") - 1; + + for (j = 0; j < seg->node_count; j++) + { + char *lvname; + + p = grub_strchr (p, '"'); + p = p ? grub_strchr (p + 1, '"') : 0; + p = p ? grub_strchr (p + 1, '"') : 0; + if (p == NULL) + goto lvs_segment_fail2; + q = ++p; + while (*q != '"') + q++; + + s = q - p; + + lvname = grub_malloc (s + 1); + if (lvname == NULL) + goto lvs_segment_fail2; + + grub_memcpy (lvname, p, s); + lvname[s] = '\0'; + seg->nodes[j].name = lvname; + p = q + 1; + } + if (seg->type == GRUB_DISKFILTER_RAID4) + { + char *tmp; + tmp = seg->nodes[0].name; + grub_memmove (seg->nodes, seg->nodes + 1, + sizeof (seg->nodes[0]) + * (seg->node_count - 1)); + seg->nodes[seg->node_count - 1].name = tmp; + } + } + else if (grub_memcmp (p, "cache\"", + sizeof ("cache\"") - 1) == 0) + { + struct cache_lv *cache = NULL; + + char *p2, *p3; + grub_size_t sz; + + cache = grub_zalloc (sizeof (*cache)); + if (!cache) + goto cache_lv_fail; + cache->lv = grub_zalloc (sizeof (*cache->lv)); + if (!cache->lv) + goto cache_lv_fail; + grub_memcpy (cache->lv, lv, sizeof (*cache->lv)); + + if (lv->fullname) + { + cache->lv->fullname = grub_strdup (lv->fullname); + if (!cache->lv->fullname) + goto cache_lv_fail; + } + if (lv->idname) + { + cache->lv->idname = grub_strdup (lv->idname); + if (!cache->lv->idname) + goto cache_lv_fail; + } + if (lv->name) + { + cache->lv->name = grub_strdup (lv->name); + if (!cache->lv->name) + goto cache_lv_fail; + } + + skip_lv = 1; + + p2 = grub_strstr (p, "cache_pool = \""); + if (!p2) + goto cache_lv_fail; + + p2 = grub_strchr (p2, '"'); + if (!p2) + goto cache_lv_fail; + + p3 = ++p2; + if (p3 == mda_end) + goto cache_lv_fail; + p3 = grub_strchr (p3, '"'); + if (!p3) + goto cache_lv_fail; + + sz = p3 - p2; + + cache->cache_pool = grub_malloc (sz + 1); + if (!cache->cache_pool) + goto cache_lv_fail; + grub_memcpy (cache->cache_pool, p2, sz); + cache->cache_pool[sz] = '\0'; + + p2 = grub_strstr (p, "origin = \""); + if (!p2) + goto cache_lv_fail; + + p2 = grub_strchr (p2, '"'); + if (!p2) + goto cache_lv_fail; + + p3 = ++p2; + if (p3 == mda_end) + goto cache_lv_fail; + p3 = grub_strchr (p3, '"'); + if (!p3) + goto cache_lv_fail; + + sz = p3 - p2; + + cache->origin = grub_malloc (sz + 1); + if (!cache->origin) + goto cache_lv_fail; + grub_memcpy (cache->origin, p2, sz); + cache->origin[sz] = '\0'; + + cache->next = cache_lvs; + cache_lvs = cache; + break; + + cache_lv_fail: + if (cache) + { + grub_free (cache->origin); + grub_free (cache->cache_pool); + if (cache->lv) + { + grub_free (cache->lv->fullname); + grub_free (cache->lv->idname); + grub_free (cache->lv->name); + } + grub_free (cache->lv); + grub_free (cache); + } + grub_lvm_free_cache_lvs (cache_lvs); + goto fail4; + } + else + { +#ifdef GRUB_UTIL + char *p2; + p2 = grub_strchr (p, '"'); + if (p2) + *p2 = 0; + grub_util_info ("unknown LVM type %s", p); + if (p2) + *p2 ='"'; +#endif + /* Found a non-supported type, give up and move on. */ + skip_lv = 1; + break; + } + + seg++; + + continue; + lvs_segment_fail2: + grub_free (seg->nodes); + lvs_segment_fail: + goto fail4; + } + + if (p != NULL) + p = grub_strchr (p, '}'); + if (p == NULL) + goto lvs_fail; + p += 3; + + if (skip_lv) + { + grub_free (lv->name); + grub_free (lv); + continue; + } + + lv->vg = vg; + lv->next = vg->lvs; + vg->lvs = lv; + + continue; + lvs_fail: + grub_free (lv->name); + grub_free (lv); + goto fail4; + } + } + + /* Match lvs. */ + { + struct grub_diskfilter_lv *lv1; + struct grub_diskfilter_lv *lv2; + for (lv1 = vg->lvs; lv1; lv1 = lv1->next) + for (i = 0; i < lv1->segment_count; i++) + for (j = 0; j < lv1->segments[i].node_count; j++) + { + if (vg->pvs) + for (pv = vg->pvs; pv; pv = pv->next) + { + if (! grub_strcmp (pv->name, + lv1->segments[i].nodes[j].name)) + { + lv1->segments[i].nodes[j].pv = pv; + break; + } + } + if (lv1->segments[i].nodes[j].pv == NULL) + for (lv2 = vg->lvs; lv2; lv2 = lv2->next) + { + if (lv1 == lv2) + continue; + if (grub_strcmp (lv2->name, + lv1->segments[i].nodes[j].name) == 0) + lv1->segments[i].nodes[j].lv = lv2; + } + } + + } + + { + struct cache_lv *cache; + + for (cache = cache_lvs; cache; cache = cache->next) + { + struct grub_diskfilter_lv *lv; + + for (lv = vg->lvs; lv; lv = lv->next) + if (grub_strcmp (lv->name, cache->origin) == 0) + break; + if (lv) + { + cache->lv->segments = grub_calloc (lv->segment_count, sizeof (*lv->segments)); + if (!cache->lv->segments) + { + grub_lvm_free_cache_lvs (cache_lvs); + goto fail4; + } + grub_memcpy (cache->lv->segments, lv->segments, lv->segment_count * sizeof (*lv->segments)); + + for (i = 0; i < lv->segment_count; ++i) + { + struct grub_diskfilter_node *nodes = lv->segments[i].nodes; + grub_size_t node_count = lv->segments[i].node_count; + + cache->lv->segments[i].nodes = grub_calloc (node_count, sizeof (*nodes)); + if (!cache->lv->segments[i].nodes) + { + for (j = 0; j < i; ++j) + grub_free (cache->lv->segments[j].nodes); + grub_free (cache->lv->segments); + cache->lv->segments = NULL; + grub_lvm_free_cache_lvs (cache_lvs); + goto fail4; + } + grub_memcpy (cache->lv->segments[i].nodes, nodes, node_count * sizeof (*nodes)); + } + + if (cache->lv->segments) + { + cache->lv->segment_count = lv->segment_count; + cache->lv->vg = vg; + cache->lv->next = vg->lvs; + vg->lvs = cache->lv; + cache->lv = NULL; + } + } + } + } + + grub_lvm_free_cache_lvs (cache_lvs); + if (grub_diskfilter_vg_register (vg)) + goto fail4; + } + else + { + grub_free (vgname); + } + + id->uuid = grub_malloc (GRUB_LVM_ID_STRLEN); + if (!id->uuid) + goto fail4; + grub_memcpy (id->uuid, pv_id, GRUB_LVM_ID_STRLEN); + id->uuidlen = GRUB_LVM_ID_STRLEN; + grub_free (metadatabuf); + *start_sector = -1; + return vg; + + /* Failure path. */ + fail4: + grub_free (vg); + fail3: + grub_free (vgname); + + fail2: + grub_free (metadatabuf); + fail: + return NULL; +} + + + +static struct grub_diskfilter grub_lvm_dev = { + .name = "lvm", + .detect = grub_lvm_detect, + .next = 0 +}; + +GRUB_MOD_INIT (lvm) +{ + grub_diskfilter_register_back (&grub_lvm_dev); +} + +GRUB_MOD_FINI (lvm) +{ + grub_diskfilter_unregister (&grub_lvm_dev); +} -- cgit v1.2.3