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metadata: format_text: interconnect historical LVs among each other and also with live LVs

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Interconnect historical LVs in an ancestry chain and also connect the first/last
one with its live ancestor/descendant if it exists.
This commit is contained in:
Peter Rajnoha 2016-03-01 15:22:28 +01:00
parent a61bc70f62
commit 673bc0636c
1 changed files with 119 additions and 0 deletions
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119
lib/format_text/import_vsn1.c
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@ -770,6 +770,118 @@ bad:
return 0;
}
static int _read_historical_lvnames_interconnections(struct format_instance *fid __attribute__((unused)),
struct volume_group *vg, const struct dm_config_node *hlvn,
const struct dm_config_node *vgn __attribute__((unused)),
struct dm_hash_table *pv_hash __attribute__((unused)),
struct dm_hash_table *lv_hash __attribute__((unused)),
unsigned *scan_done_once __attribute__((unused)),
unsigned report_missing_devices __attribute__((unused)))
{
struct dm_pool *mem = vg->vgmem;
const char *historical_lv_name, *origin_name = NULL;
struct generic_logical_volume *glv, *origin_glv, *descendant_glv;
struct logical_volume *tmp_lv;
struct glv_list *glvl = NULL;
const struct dm_config_value *descendants = NULL;
historical_lv_name = hlvn->key;
hlvn = hlvn->child;
if (!(glv = find_historical_glv(vg, historical_lv_name, NULL))) {
log_error("Unknown historical logical volume %s/%s%s",
vg->name, HISTORICAL_LV_PREFIX, historical_lv_name);
goto bad;
}
if (dm_config_has_node(hlvn, "origin")) {
if (!dm_config_get_str(hlvn, "origin", &origin_name)) {
log_error("Couldn't read origin for historical logical "
"volume %s/%s%s", vg->name, HISTORICAL_LV_PREFIX, historical_lv_name);
goto bad;
}
}
if (dm_config_has_node(hlvn, "descendants")) {
if (!dm_config_get_list(hlvn, "descendants", &descendants)) {
log_error("Couldn't get descendants list for historical logical "
"volume %s/%s%s", vg->name, HISTORICAL_LV_PREFIX, historical_lv_name);
goto bad;
}
if (descendants->type == DM_CFG_EMPTY_ARRAY) {
log_error("Found empty descendants list for historical logical "
"volume %s/%s%s", vg->name, HISTORICAL_LV_PREFIX, historical_lv_name);
goto bad;
}
}
if (!origin_name && !descendants)
/* no interconnections */
return 1;
if (origin_name) {
if (!(glvl = dm_pool_zalloc(mem, sizeof(struct glv_list)))) {
log_error("Failed to allocate list item for historical logical "
"volume %s/%s%s", vg->name, HISTORICAL_LV_PREFIX, historical_lv_name);
goto bad;
}
glvl->glv = glv;
if (!strncmp(origin_name, HISTORICAL_LV_PREFIX, strlen(HISTORICAL_LV_PREFIX))) {
if (!(origin_glv = find_historical_glv(vg, origin_name + strlen(HISTORICAL_LV_PREFIX), NULL))) {
log_error("Unknown origin %s for historical logical volume %s/%s%s",
origin_name, vg->name, HISTORICAL_LV_PREFIX, historical_lv_name);
goto bad;
}
} else {
if (!(tmp_lv = find_lv(vg, origin_name))) {
log_error("Unknown origin %s for historical logical volume %s/%s%s",
origin_name, vg->name, HISTORICAL_LV_PREFIX, historical_lv_name);
goto bad;
}
if (!(origin_glv = get_or_create_glv(mem, tmp_lv, NULL)))
goto bad;
}
glv->historical->indirect_origin = origin_glv;
if (origin_glv->is_historical)
dm_list_add(&origin_glv->historical->indirect_glvs, &glvl->list);
else
dm_list_add(&origin_glv->live->indirect_glvs, &glvl->list);
}
if (descendants) {
do {
if (descendants->type != DM_CFG_STRING) {
log_error("Descendant value for historical logical volume %s/%s%s "
"is not a string.", vg->name, HISTORICAL_LV_PREFIX, historical_lv_name);
goto bad;
}
if (!(tmp_lv = find_lv(vg, descendants->v.str))) {
log_error("Failed to find descendant %s for historical LV %s.",
descendants->v.str, historical_lv_name);
goto bad;
}
if (!(descendant_glv = get_or_create_glv(mem, tmp_lv, NULL)))
goto bad;
if (!add_glv_to_indirect_glvs(mem, glv, descendant_glv))
goto bad;
descendants = descendants->next;
} while (descendants);
}
return 1;
bad:
if (glvl)
dm_pool_free(mem, glvl);
return 0;
}
static int _read_lvsegs(struct format_instance *fid,
struct volume_group *vg, const struct dm_config_node *lvn,
const struct dm_config_node *vgn __attribute__((unused)),
@ -1067,6 +1179,13 @@ static struct volume_group *_read_vg(struct format_instance *fid,
goto bad;
}
if (!_read_sections(fid, "historical_logical_volumes", _read_historical_lvnames_interconnections,
vg, vgn, pv_hash, lv_hash, 1, NULL)) {
log_error("Couldn't read all removed logical volume interconnections "
"for volume group %s.", vg->name);
goto bad;
}
if (!fixup_imported_mirrors(vg)) {
log_error("Failed to fixup mirror pointers after import for "
"volume group %s.", vg->name);