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-rw-r--r--grub-core/disk/lvm.c1091
1 files changed, 1091 insertions, 0 deletions
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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/dl.h>
+#include <grub/disk.h>
+#include <grub/mm.h>
+#include <grub/err.h>
+#include <grub/misc.h>
+#include <grub/lvm.h>
+#include <grub/partition.h>
+#include <grub/i18n.h>
+#include <grub/safemath.h>
+
+#ifdef GRUB_UTIL
+#include <grub/emu/misc.h>
+#include <grub/emu/hostdisk.h>
+#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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-04 20:20:03 +0000