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03f9cd95b4
lvm2/lib/format_text/import_vsn1.c
David Teigland 74ad2cd76f metadata: add vg_from_config_tree 
Add cmd/fmt args to import functions so that
they can be used without the fid arg which.
2019-11-27 11:13:47 -06:00

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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2017 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "lib/misc/lib.h"
#include "lib/metadata/metadata.h"
#include "import-export.h"
#include "lib/display/display.h"
#include "lib/commands/toolcontext.h"
#include "lib/cache/lvmcache.h"
#include "lib/locking/lvmlockd.h"
#include "lib/metadata/lv_alloc.h"
#include "lib/metadata/pv_alloc.h"
#include "lib/metadata/segtype.h"
#include "lib/format_text/text_import.h"
#include "lib/config/defaults.h"
#include "lib/datastruct/str_list.h"
typedef int (*section_fn) (struct cmd_context *cmd,
struct format_type *fmt,
struct format_instance *fid,
struct dm_pool *mem,
struct volume_group *vg,
struct lvmcache_vgsummary *vgsummary,
const struct dm_config_node *pvn,
const struct dm_config_node *vgn,
struct dm_hash_table *pv_hash,
struct dm_hash_table *lv_hash);
#define _read_int32(root, path, result) \
dm_config_get_uint32(root, path, (uint32_t *) (result))
#define _read_uint32(root, path, result) \
dm_config_get_uint32(root, path, (result))
#define _read_uint64(root, path, result) \
dm_config_get_uint64(root, path, (result))
/*
* Logs an attempt to read an invalid format file.
*/
static void _invalid_format(const char *str)
{
log_error("Can't process text format file - %s.", str);
}
/*
* Checks that the config file contains vg metadata, and that it
* we recognise the version number,
*/
static int _vsn1_check_version(const struct dm_config_tree *cft)
{
const struct dm_config_node *cn;
const struct dm_config_value *cv;
/*
* Check the contents field.
*/
if (!(cn = dm_config_find_node(cft->root, CONTENTS_FIELD))) {
_invalid_format("missing contents field");
return 0;
}
cv = cn->v;
if (!cv || cv->type != DM_CFG_STRING || strcmp(cv->v.str, CONTENTS_VALUE)) {
_invalid_format("unrecognised contents field");
return 0;
}
/*
* Check the version number.
*/
if (!(cn = dm_config_find_node(cft->root, FORMAT_VERSION_FIELD))) {
_invalid_format("missing version number");
return 0;
}
cv = cn->v;
if (!cv || cv->type != DM_CFG_INT || cv->v.i != FORMAT_VERSION_VALUE) {
_invalid_format("unrecognised version number");
return 0;
}
return 1;
}
static int _is_converting(struct logical_volume *lv)
{
struct lv_segment *seg;
if (lv_is_mirrored(lv)) {
seg = first_seg(lv);
/* Can't use is_temporary_mirror() because the metadata for
* seg_lv may not be read in and flags may not be set yet. */
if (seg_type(seg, 0) == AREA_LV &&
strstr(seg_lv(seg, 0)->name, MIRROR_SYNC_LAYER))
return 1;
}
return 0;
}
static int _read_id(struct id *id, const struct dm_config_node *cn, const char *path)
{
const char *uuid;
if (!dm_config_get_str(cn, path, &uuid)) {
log_error("Couldn't find uuid.");
return 0;
}
if (!id_read_format(id, uuid)) {
log_error("Invalid uuid.");
return 0;
}
return 1;
}
static int _read_flag_config(const struct dm_config_node *n, uint64_t *status, int type)
{
const struct dm_config_value *cv;
*status = 0;
if (!dm_config_get_list(n, "status", &cv)) {
log_error("Could not find status flags.");
return 0;
}
/* For backward compatible metadata accept both type of flags */
if (!(read_flags(status, type, STATUS_FLAG | SEGTYPE_FLAG, cv))) {
log_error("Could not read status flags.");
return 0;
}
if (dm_config_get_list(n, "flags", &cv)) {
if (!(read_flags(status, type, COMPATIBLE_FLAG, cv))) {
log_error("Could not read flags.");
return 0;
}
}
return 1;
}
static int _read_str_list(struct dm_pool *mem, struct dm_list *list, const struct dm_config_value *cv)
{
if (cv->type == DM_CFG_EMPTY_ARRAY)
return 1;
while (cv) {
if (cv->type != DM_CFG_STRING) {
log_error("Found an item that is not a string");
return 0;
}
if (!str_list_add(mem, list, dm_pool_strdup(mem, cv->v.str)))
return_0;
cv = cv->next;
}
return 1;
}
static int _read_pv(struct cmd_context *cmd,
struct format_type *fmt,
struct format_instance *fid,
struct dm_pool *mem,
struct volume_group *vg,
struct lvmcache_vgsummary *vgsummary,
const struct dm_config_node *pvn,
const struct dm_config_node *vgn __attribute__((unused)),
struct dm_hash_table *pv_hash,
struct dm_hash_table *lv_hash __attribute__((unused)))
{
struct physical_volume *pv;
struct pv_list *pvl;
const struct dm_config_value *cv;
const char *device_hint;
uint64_t size, ba_start;
if (!(pvl = dm_pool_zalloc(mem, sizeof(*pvl))) ||
!(pvl->pv = dm_pool_zalloc(mem, sizeof(*pvl->pv))))
return_0;
pv = pvl->pv;
/*
* Add the pv to the pv hash for quick lookup when we read
* the lv segments.
*/
if (!dm_hash_insert(pv_hash, pvn->key, pv))
return_0;
if (!(pvn = pvn->child)) {
log_error("Empty pv section.");
return 0;
}
if (!_read_id(&pv->id, pvn, "id")) {
log_error("Couldn't read uuid for physical volume.");
return 0;
}
pv->is_labelled = 1; /* All format_text PVs are labelled. */
if (!(pv->vg_name = dm_pool_strdup(mem, vg->name)))
return_0;
memcpy(&pv->vgid, &vg->id, sizeof(vg->id));
if (!_read_flag_config(pvn, &pv->status, PV_FLAGS)) {
log_error("Couldn't read status flags for physical volume.");
return 0;
}
/* Late addition */
if (dm_config_has_node(pvn, "dev_size") &&
!_read_uint64(pvn, "dev_size", &pv->size)) {
log_error("Couldn't read dev size for physical volume.");
return 0;
}
if (dm_config_get_str(pvn, "device", &device_hint)) {
if (!(pv->device_hint = dm_pool_strdup(mem, device_hint)))
log_error("Failed to allocate memory for device hint in read_pv.");
}
if (!_read_uint64(pvn, "pe_start", &pv->pe_start)) {
log_error("Couldn't read extent start value (pe_start) "
"for physical volume.");
return 0;
}
if (!_read_int32(pvn, "pe_count", &pv->pe_count)) {
log_error("Couldn't find extent count (pe_count) for "
"physical volume.");
return 0;
}
/* Bootloader area is not compulsory - just log_debug for the record if found. */
ba_start = size = 0;
_read_uint64(pvn, "ba_start", &ba_start);
_read_uint64(pvn, "ba_size", &size);
if (ba_start && size) {
log_debug_metadata("Found bootloader area specification for PV %s "
"in metadata: ba_start=%" PRIu64 ", ba_size=%" PRIu64 ".",
pv_dev_name(pv), ba_start, size);
pv->ba_start = ba_start;
pv->ba_size = size;
} else if ((!ba_start && size) || (ba_start && !size)) {
log_error("Found incomplete bootloader area specification "
"for PV %s in metadata.", pv_dev_name(pv));
return 0;
}
dm_list_init(&pv->tags);
dm_list_init(&pv->segments);
/* Optional tags */
if (dm_config_get_list(pvn, "tags", &cv) &&
!(_read_str_list(mem, &pv->tags, cv))) {
log_error("Couldn't read tags for physical volume %s in %s.",
pv_dev_name(pv), vg->name);
return 0;
}
pv->pe_size = vg->extent_size;
pv->pe_alloc_count = 0;
pv->pe_align = 0;
pv->fmt = fmt;
if (!alloc_pv_segment_whole_pv(mem, pv))
return_0;
vg->extent_count += pv->pe_count;
vg->free_count += pv->pe_count;
add_pvl_to_vgs(vg, pvl);
return 1;
}
static int _read_pvsummary(struct cmd_context *cmd,
struct format_type *fmt,
struct format_instance *fid,
struct dm_pool *mem,
struct volume_group *vg,
struct lvmcache_vgsummary *vgsummary,
const struct dm_config_node *pvn,
const struct dm_config_node *vgn __attribute__((unused)),
struct dm_hash_table *pv_hash __attribute__((unused)),
struct dm_hash_table *lv_hash __attribute__((unused)))
{
struct physical_volume *pv;
struct pv_list *pvl;
const char *device_hint;
if (!(pvl = dm_pool_zalloc(mem, sizeof(*pvl))) ||
!(pvl->pv = dm_pool_zalloc(mem, sizeof(*pvl->pv))))
return_0;
pv = pvl->pv;
if (!(pvn = pvn->child)) {
log_error("Empty pv section.");
return 0;
}
if (!_read_id(&pv->id, pvn, "id"))
log_warn("Couldn't read uuid for physical volume.");
if (dm_config_has_node(pvn, "dev_size") &&
!_read_uint64(pvn, "dev_size", &pv->size))
log_warn("Couldn't read dev size for physical volume.");
if (dm_config_get_str(pvn, "device", &device_hint)) {
if (!(pv->device_hint = dm_pool_strdup(mem, device_hint)))
log_error("Failed to allocate memory for device hint in read_pv.");
}
dm_list_add(&vgsummary->pvsummaries, &pvl->list);
return 1;
}
static void _insert_segment(struct logical_volume *lv, struct lv_segment *seg)
{
struct lv_segment *comp;
dm_list_iterate_items(comp, &lv->segments) {
if (comp->le > seg->le) {
dm_list_add(&comp->list, &seg->list);
return;
}
}
lv->le_count += seg->len;
dm_list_add(&lv->segments, &seg->list);
}
static int _read_segment(struct cmd_context *cmd,
struct format_type *fmt,
struct format_instance *fid,
struct dm_pool *mem,
struct logical_volume *lv, const struct dm_config_node *sn,
struct dm_hash_table *pv_hash)
{
uint32_t area_count = 0u;
struct lv_segment *seg;
const struct dm_config_node *sn_child = sn->child;
const struct dm_config_value *cv;
uint32_t area_extents, start_extent, extent_count, reshape_count, data_copies;
struct segment_type *segtype;
const char *segtype_str;
char *segtype_with_flags;
if (!sn_child) {
log_error("Empty segment section.");
return 0;
}
if (!_read_int32(sn_child, "start_extent", &start_extent)) {
log_error("Couldn't read 'start_extent' for segment '%s' "
"of logical volume %s.", sn->key, lv->name);
return 0;
}
if (!_read_int32(sn_child, "extent_count", &extent_count)) {
log_error("Couldn't read 'extent_count' for segment '%s' "
"of logical volume %s.", sn->key, lv->name);
return 0;
}
if (!_read_int32(sn_child, "reshape_count", &reshape_count))
reshape_count = 0;
if (!_read_int32(sn_child, "data_copies", &data_copies))
data_copies = 1;
segtype_str = SEG_TYPE_NAME_STRIPED;
if (!dm_config_get_str(sn_child, "type", &segtype_str)) {
log_error("Segment type must be a string.");
return 0;
}
/* Locally duplicate to parse out status flag bits */
if (!(segtype_with_flags = dm_pool_strdup(mem, segtype_str))) {
log_error("Cannot duplicate segtype string.");
return 0;
}
if (!read_segtype_lvflags(&lv->status, segtype_with_flags)) {
log_error("Couldn't read segtype for logical volume %s.",
display_lvname(lv));
return 0;
}
if (!(segtype = get_segtype_from_string(cmd, segtype_with_flags)))
return_0;
/* Can drop temporary string here as nothing has allocated from VGMEM meanwhile */
dm_pool_free(mem, segtype_with_flags);
if (segtype->ops->text_import_area_count &&
!segtype->ops->text_import_area_count(sn_child, &area_count))
return_0;
area_extents = segtype->parity_devs ?
raid_rimage_extents(segtype, extent_count, area_count - segtype->parity_devs, data_copies) : extent_count;
if (!(seg = alloc_lv_segment(segtype, lv, start_extent,
extent_count, reshape_count, 0, 0, NULL, area_count,
area_extents, data_copies, 0, 0, 0, NULL))) {
log_error("Segment allocation failed");
return 0;
}
if (seg->segtype->ops->text_import &&
!seg->segtype->ops->text_import(seg, sn_child, pv_hash))
return_0;
/* Optional tags */
if (dm_config_get_list(sn_child, "tags", &cv) &&
!(_read_str_list(mem, &seg->tags, cv))) {
log_error("Couldn't read tags for a segment of %s/%s.",
lv->vg->name, lv->name);
return 0;
}
/*
* Insert into correct part of segment list.
*/
_insert_segment(lv, seg);
if (seg_is_mirror(seg))
lv->status |= MIRROR;
if (seg_is_mirrored(seg))
lv->status |= MIRRORED;
if (seg_is_raid(seg))
lv->status |= RAID;
if (seg_is_virtual(seg))
lv->status |= VIRTUAL;
if (!seg_is_raid(seg) && _is_converting(lv))
lv->status |= CONVERTING;
return 1;
}
int text_import_areas(struct lv_segment *seg, const struct dm_config_node *sn,
const struct dm_config_value *cv, struct dm_hash_table *pv_hash,
uint64_t status)
{
unsigned int s;
struct logical_volume *lv1;
struct physical_volume *pv;
const char *seg_name = dm_config_parent_name(sn);
if (!seg->area_count) {
log_error("Zero areas not allowed for segment %s", seg_name);
return 0;
}
for (s = 0; cv && s < seg->area_count; s++, cv = cv->next) {
/* first we read the pv */
if (cv->type != DM_CFG_STRING) {
log_error("Bad volume name in areas array for segment %s.", seg_name);
return 0;
}
if (!cv->next) {
log_error("Missing offset in areas array for segment %s.", seg_name);
return 0;
}
if (cv->next->type != DM_CFG_INT) {
log_error("Bad offset in areas array for segment %s.", seg_name);
return 0;
}
/* FIXME Cope if LV not yet read in */
if ((pv = dm_hash_lookup(pv_hash, cv->v.str))) {
if (!set_lv_segment_area_pv(seg, s, pv, (uint32_t) cv->next->v.i))
return_0;
} else if ((lv1 = find_lv(seg->lv->vg, cv->v.str))) {
if (!set_lv_segment_area_lv(seg, s, lv1,
(uint32_t) cv->next->v.i,
status))
return_0;
} else {
log_error("Couldn't find volume '%s' "
"for segment '%s'.",
cv->v.str ? : "NULL", seg_name);
return 0;
}
cv = cv->next;
}
/*
* Check we read the correct number of stripes.
*/
if (cv || (s < seg->area_count)) {
log_error("Incorrect number of areas in area array "
"for segment '%s'.", seg_name);
return 0;
}
return 1;
}
static int _read_segments(struct cmd_context *cmd,
struct format_type *fmt,
struct format_instance *fid,
struct dm_pool *mem,
struct logical_volume *lv, const struct dm_config_node *lvn,
struct dm_hash_table *pv_hash)
{
const struct dm_config_node *sn;
int count = 0, seg_count;
for (sn = lvn; sn; sn = sn->sib) {
/*
* All sub-sections are assumed to be segments.
*/
if (!sn->v) {
if (!_read_segment(cmd, fmt, fid, mem, lv, sn, pv_hash))
return_0;
count++;
}
/* FIXME Remove this restriction */
if (lv_is_snapshot(lv) && count > 1) {
log_error("Only one segment permitted for snapshot");
return 0;
}
}
if (!_read_int32(lvn, "segment_count", &seg_count)) {
log_error("Couldn't read segment count for logical volume %s.",
lv->name);
return 0;
}
if (seg_count != count) {
log_error("segment_count and actual number of segments "
"disagree for logical volume %s.", lv->name);
return 0;
}
/*
* Check there are no gaps or overlaps in the lv.
*/
if (!check_lv_segments(lv, 0))
return_0;
/*
* Merge segments in case someones been editing things by hand.
*/
if (!lv_merge_segments(lv))
return_0;
return 1;
}
static int _read_lvnames(struct cmd_context *cmd,
struct format_type *fmt,
struct format_instance *fid __attribute__((unused)),
struct dm_pool *mem,
struct volume_group *vg,
struct lvmcache_vgsummary *vgsummary,
const struct dm_config_node *lvn,
const struct dm_config_node *vgn __attribute__((unused)),
struct dm_hash_table *pv_hash __attribute__((unused)),
struct dm_hash_table *lv_hash)
{
struct logical_volume *lv;
const char *str;
const struct dm_config_value *cv;
const char *hostname;
uint64_t timestamp = 0, lvstatus;
if (!(lv = alloc_lv(mem)))
return_0;
if (!link_lv_to_vg(vg, lv))
return_0;
if (!(lv->name = dm_pool_strdup(mem, lvn->key)))
return_0;
log_debug_metadata("Importing logical volume %s.", display_lvname(lv));
if (!(lvn = lvn->child)) {
log_error("Empty logical volume section for %s.",
display_lvname(lv));
return 0;
}
if (!_read_flag_config(lvn, &lvstatus, LV_FLAGS)) {
log_error("Couldn't read status flags for logical volume %s.",
display_lvname(lv));
return 0;
}
if (lvstatus & LVM_WRITE_LOCKED) {
lvstatus |= LVM_WRITE;
lvstatus &= ~LVM_WRITE_LOCKED;
}
lv->status = lvstatus;
if (dm_config_has_node(lvn, "creation_time")) {
if (!_read_uint64(lvn, "creation_time", &timestamp)) {
log_error("Invalid creation_time for logical volume %s.",
display_lvname(lv));
return 0;
}
if (!dm_config_get_str(lvn, "creation_host", &hostname)) {
log_error("Couldn't read creation_host for logical volume %s.",
display_lvname(lv));
return 0;
}
} else if (dm_config_has_node(lvn, "creation_host")) {
log_error("Missing creation_time for logical volume %s.",
display_lvname(lv));
return 0;
}
/*
* The LV lock_args string is generated in lvmlockd, and the content
* depends on the lock_type.
*
* lock_type dlm does not use LV lock_args, so the LV lock_args field
* is just set to "dlm".
*
* lock_type sanlock uses the LV lock_args field to save the
* location on disk of that LV's sanlock lock. The disk name is
* specified in the VG lock_args. The lock_args string begins
* with a version number, e.g. 1.0.0, followed by a colon, followed
* by a number. The number is the offset on disk where sanlock is
* told to find the LV's lock.
* e.g. lock_args = 1.0.0:70254592
* means that the lock is located at offset 70254592.
*
* The lvmlockd code for each specific lock manager also validates
* the lock_args before using it to access the lock manager.
*/
if (dm_config_get_str(lvn, "lock_args", &str)) {
if (!(lv->lock_args = dm_pool_strdup(mem, str)))
return_0;
}
if (dm_config_get_str(lvn, "allocation_policy", &str)) {
lv->alloc = get_alloc_from_string(str);
if (lv->alloc == ALLOC_INVALID) {
log_warn("WARNING: Ignoring unrecognised allocation policy %s for LV %s.",
str, display_lvname(lv));
lv->alloc = ALLOC_INHERIT;
}
} else
lv->alloc = ALLOC_INHERIT;
if (dm_config_get_str(lvn, "profile", &str)) {
log_debug_metadata("Adding profile configuration %s for LV %s.",
str, display_lvname(lv));
if (!(lv->profile = add_profile(cmd, str, CONFIG_PROFILE_METADATA))) {
log_error("Failed to add configuration profile %s for LV %s.",
str, display_lvname(lv));
return 0;
}
}
if (!_read_int32(lvn, "read_ahead", &lv->read_ahead))
/* If not present, choice of auto or none is configurable */
lv->read_ahead = cmd->default_settings.read_ahead;
else {
switch (lv->read_ahead) {
case 0:
lv->read_ahead = DM_READ_AHEAD_AUTO;
break;
case UINT32_C(-1):
lv->read_ahead = DM_READ_AHEAD_NONE;
break;
default:
;
}
}
/* Optional tags */
if (dm_config_get_list(lvn, "tags", &cv) &&
!(_read_str_list(mem, &lv->tags, cv))) {
log_error("Couldn't read tags for logical volume %s.",
display_lvname(lv));
return 0;
}
if (!dm_hash_insert(lv_hash, lv->name, lv))
return_0;
if (timestamp && !lv_set_creation(lv, hostname, timestamp))
return_0;
if (!lv_is_visible(lv) && strstr(lv->name, "_pmspare")) {
if (vg->pool_metadata_spare_lv) {
log_error("Couldn't use another pool metadata spare "
"logical volume %s.", display_lvname(lv));
return 0;
}
log_debug_metadata("Logical volume %s is pool metadata spare.",
display_lvname(lv));
lv->status |= POOL_METADATA_SPARE;
vg->pool_metadata_spare_lv = lv;
}
if (!lv_is_visible(lv) && !strcmp(lv->name, LOCKD_SANLOCK_LV_NAME)) {
log_debug_metadata("Logical volume %s is sanlock lv.",
display_lvname(lv));
lv->status |= LOCKD_SANLOCK_LV;
vg->sanlock_lv = lv;
}
return 1;
}
static int _read_historical_lvnames(struct cmd_context *cmd,
struct format_type *fmt,
struct format_instance *fid __attribute__((unused)),
struct dm_pool *mem,
struct volume_group *vg,
struct lvmcache_vgsummary *vgsummary,
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)))
{
struct generic_logical_volume *glv;
struct glv_list *glvl;
const char *str;
uint64_t timestamp;
if (!(glv = dm_pool_zalloc(mem, sizeof(struct generic_logical_volume))) ||
!(glv->historical = dm_pool_zalloc(mem, sizeof(struct historical_logical_volume))) ||
!(glvl = dm_pool_zalloc(mem, sizeof(struct glv_list)))) {
log_error("Removed logical volume structure allocation failed");
goto bad;
}
glv->is_historical = 1;
glv->historical->vg = vg;
dm_list_init(&glv->historical->indirect_glvs);
if (!(glv->historical->name = dm_pool_strdup(mem, hlvn->key)))
goto_bad;
if (!(hlvn = hlvn->child)) {
log_error("Empty removed logical volume section.");
goto bad;
}
if (!_read_id(&glv->historical->lvid.id[1], hlvn, "id")) {
log_error("Couldn't read uuid for removed logical volume %s in vg %s.",
glv->historical->name, vg->name);
return 0;
}
memcpy(&glv->historical->lvid.id[0], &glv->historical->vg->id, sizeof(glv->historical->lvid.id[0]));
if (dm_config_get_str(hlvn, "name", &str)) {
if (!(glv->historical->name = dm_pool_strdup(mem, str)))
goto_bad;
}
if (dm_config_has_node(hlvn, "creation_time")) {
if (!_read_uint64(hlvn, "creation_time", &timestamp)) {
log_error("Invalid creation_time for removed logical volume %s.", str);
goto bad;
}
glv->historical->timestamp = timestamp;
}
if (dm_config_has_node(hlvn, "removal_time")) {
if (!_read_uint64(hlvn, "removal_time", &timestamp)) {
log_error("Invalid removal_time for removed logical volume %s.", str);
goto bad;
}
glv->historical->timestamp_removed = timestamp;
}
glvl->glv = glv;
dm_list_add(&vg->historical_lvs, &glvl->list);
return 1;
bad:
if (glv)
dm_pool_free(mem, glv);
return 0;
}
static int _read_historical_lvnames_interconnections(struct cmd_context *cmd,
struct format_type *fmt,
struct format_instance *fid __attribute__((unused)),
struct dm_pool *mem,
struct volume_group *vg,
struct lvmcache_vgsummary *vgsummary,
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)))
{
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, 0, 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), 0, 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 cmd_context *cmd,
struct format_type *fmt,
struct format_instance *fid,
struct dm_pool *mem,
struct volume_group *vg,
struct lvmcache_vgsummary *vgsummary,
const struct dm_config_node *lvn,
const struct dm_config_node *vgn __attribute__((unused)),
struct dm_hash_table *pv_hash,
struct dm_hash_table *lv_hash)
{
struct logical_volume *lv;
if (!(lv = dm_hash_lookup(lv_hash, lvn->key))) {
log_error("Lost logical volume reference %s", lvn->key);
return 0;
}
if (!(lvn = lvn->child)) {
log_error("Empty logical volume section.");
return 0;
}
/* FIXME: read full lvid */
if (!_read_id(&lv->lvid.id[1], lvn, "id")) {
log_error("Couldn't read uuid for logical volume %s.",
display_lvname(lv));
return 0;
}
memcpy(&lv->lvid.id[0], &lv->vg->id, sizeof(lv->lvid.id[0]));
if (!_read_segments(cmd, fmt, fid, mem, lv, lvn, pv_hash))
return_0;
lv->size = (uint64_t) lv->le_count * (uint64_t) vg->extent_size;
lv->minor = -1;
lv->major = -1;
if (lv->status & FIXED_MINOR) {
if (!_read_int32(lvn, "minor", &lv->minor)) {
log_error("Couldn't read minor number for logical volume %s.",
display_lvname(lv));
return 0;
}
if (!dm_config_has_node(lvn, "major"))
/* If major is missing, pick default */
lv->major = cmd->dev_types->device_mapper_major;
else if (!_read_int32(lvn, "major", &lv->major)) {
log_warn("WARNING: Couldn't read major number for logical "
"volume %s.", display_lvname(lv));
lv->major = cmd->dev_types->device_mapper_major;
}
if (!validate_major_minor(cmd, fmt, lv->major, lv->minor)) {
log_warn("WARNING: Ignoring invalid major, minor number for "
"logical volume %s.", display_lvname(lv));
lv->major = lv->minor = -1;
}
}
return 1;
}
static int _read_sections(struct cmd_context *cmd,
const struct format_type *fmt,
struct format_instance *fid,
struct dm_pool *mem,
const char *section, section_fn fn,
struct volume_group *vg,
struct lvmcache_vgsummary *vgsummary,
const struct dm_config_node *vgn,
struct dm_hash_table *pv_hash,
struct dm_hash_table *lv_hash,
int optional)
{
const struct dm_config_node *n;
if (!dm_config_get_section(vgn, section, &n)) {
if (!optional) {
log_error("Couldn't find section '%s'.", section);
return 0;
}
return 1;
}
for (n = n->child; n; n = n->sib) {
if (!fn(cmd, (struct format_type *)fmt, fid, mem, vg, vgsummary, n, vgn, pv_hash, lv_hash))
return_0;
}
return 1;
}
static struct volume_group *_read_vg(struct cmd_context *cmd,
const struct format_type *fmt,
struct format_instance *fid,
const struct dm_config_tree *cft)
{
struct dm_pool *mem;
const struct dm_config_node *vgn;
const struct dm_config_value *cv;
const char *str, *format_str, *system_id;
struct volume_group *vg;
struct dm_hash_table *pv_hash = NULL, *lv_hash = NULL;
uint64_t vgstatus;
/* skip any top-level values */
for (vgn = cft->root; (vgn && vgn->v); vgn = vgn->sib)
;
if (!vgn) {
log_error("Couldn't find volume group in file.");
return NULL;
}
if (!(vg = alloc_vg("read_vg", cmd, vgn->key)))
return_NULL;
mem = vg->vgmem;
/*
* The pv hash memorises the pv section names -> pv
* structures.
*/
if (!(pv_hash = dm_hash_create(64))) {
log_error("Couldn't create pv hash table.");
goto bad;
}
/*
* The lv hash memorises the lv section names -> lv
* structures.
*/
if (!(lv_hash = dm_hash_create(1024))) {
log_error("Couldn't create lv hash table.");
goto bad;
}
vgn = vgn->child;
/* A backup file might be a backup of a different format */
if (dm_config_get_str(vgn, "format", &format_str) &&
!(vg->original_fmt = get_format_by_name(cmd, format_str))) {
log_error("Unrecognised format %s for volume group %s.", format_str, vg->name);
goto bad;
}
if (dm_config_get_str(vgn, "lock_type", &str)) {
if (!(vg->lock_type = dm_pool_strdup(mem, str)))
goto bad;
}
/*
* The VG lock_args string is generated in lvmlockd, and the content
* depends on the lock_type. lvmlockd begins the lock_args string
* with a version number, e.g. 1.0.0, followed by a colon, followed
* by a string that depends on the lock manager. The string after
* the colon is information needed to use the lock manager for the VG.
*
* For sanlock, the string is the name of the internal LV used to store
* sanlock locks. lvmlockd needs to know where the locks are located
* so it can pass that location to sanlock which needs to access the locks.
* e.g. lock_args = 1.0.0:lvmlock
* means that the locks are located on the the LV "lvmlock".
*
* For dlm, the string is the dlm cluster name. lvmlockd needs to use
* a dlm lockspace in this cluster to use the VG.
* e.g. lock_args = 1.0.0:foo
* means that the host needs to be a member of the cluster "foo".
*
* The lvmlockd code for each specific lock manager also validates
* the lock_args before using it to access the lock manager.
*/
if (dm_config_get_str(vgn, "lock_args", &str)) {
if (!(vg->lock_args = dm_pool_strdup(mem, str)))
goto bad;
}
if (!_read_id(&vg->id, vgn, "id")) {
log_error("Couldn't read uuid for volume group %s.", vg->name);
goto bad;
}
if (!_read_int32(vgn, "seqno", &vg->seqno)) {
log_error("Couldn't read 'seqno' for volume group %s.",
vg->name);
goto bad;
}
if (!_read_flag_config(vgn, &vgstatus, VG_FLAGS)) {
log_error("Error reading flags of volume group %s.",
vg->name);
goto bad;
}
if (dm_config_get_str(vgn, "system_id", &system_id)) {
if (!(vg->system_id = dm_pool_strdup(mem, system_id))) {
log_error("Failed to allocate memory for system_id in _read_vg.");
goto bad;
}
}
if (vgstatus & LVM_WRITE_LOCKED) {
vgstatus |= LVM_WRITE;
vgstatus &= ~LVM_WRITE_LOCKED;
}
vg->status = vgstatus;
if (!_read_int32(vgn, "extent_size", &vg->extent_size)) {
log_error("Couldn't read extent size for volume group %s.",
vg->name);
goto bad;
}
/*
* 'extent_count' and 'free_count' get filled in
* implicitly when reading in the pv's and lv's.
*/
if (!_read_int32(vgn, "max_lv", &vg->max_lv)) {
log_error("Couldn't read 'max_lv' for volume group %s.",
vg->name);
goto bad;
}
if (!_read_int32(vgn, "max_pv", &vg->max_pv)) {
log_error("Couldn't read 'max_pv' for volume group %s.",
vg->name);
goto bad;
}
if (dm_config_get_str(vgn, "allocation_policy", &str)) {
vg->alloc = get_alloc_from_string(str);
if (vg->alloc == ALLOC_INVALID) {
log_warn("WARNING: Ignoring unrecognised allocation policy %s for VG %s", str, vg->name);
vg->alloc = ALLOC_NORMAL;
}
}
if (dm_config_get_str(vgn, "profile", &str)) {
log_debug_metadata("Adding profile configuration %s for VG %s.", str, vg->name);
vg->profile = add_profile(cmd, str, CONFIG_PROFILE_METADATA);
if (!vg->profile) {
log_error("Failed to add configuration profile %s for VG %s", str, vg->name);
goto bad;
}
}
if (!_read_uint32(vgn, "metadata_copies", &vg->mda_copies)) {
vg->mda_copies = DEFAULT_VGMETADATACOPIES;
}
if (!_read_sections(cmd, fmt, fid, mem, "physical_volumes", _read_pv, vg, NULL,
vgn, pv_hash, lv_hash, 0)) {
log_error("Couldn't find all physical volumes for volume "
"group %s.", vg->name);
goto bad;
}
/* Optional tags */
if (dm_config_get_list(vgn, "tags", &cv) &&
!(_read_str_list(mem, &vg->tags, cv))) {
log_error("Couldn't read tags for volume group %s.", vg->name);
goto bad;
}
if (!_read_sections(cmd, fmt, fid, mem, "logical_volumes", _read_lvnames, vg, NULL,
vgn, pv_hash, lv_hash, 1)) {
log_error("Couldn't read all logical volume names for volume "
"group %s.", vg->name);
goto bad;
}
if (!_read_sections(cmd, fmt, fid, mem, "historical_logical_volumes", _read_historical_lvnames, vg, NULL,
vgn, pv_hash, lv_hash, 1)) {
log_error("Couldn't read all historical logical volumes for volume "
"group %s.", vg->name);
goto bad;
}
if (!_read_sections(cmd, fmt, fid, mem, "logical_volumes", _read_lvsegs, vg, NULL,
vgn, pv_hash, lv_hash, 1)) {
log_error("Couldn't read all logical volumes for "
"volume group %s.", vg->name);
goto bad;
}
if (!_read_sections(cmd, fmt, fid, mem, "historical_logical_volumes", _read_historical_lvnames_interconnections,
vg, NULL, vgn, pv_hash, lv_hash, 1)) {
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);
goto bad;
}
dm_hash_destroy(pv_hash);
dm_hash_destroy(lv_hash);
if (fid)
vg_set_fid(vg, fid);
/*
* Finished.
*/
return vg;
bad:
if (pv_hash)
dm_hash_destroy(pv_hash);
if (lv_hash)
dm_hash_destroy(lv_hash);
release_vg(vg);
return NULL;
}
static void _read_desc(struct dm_pool *mem,
const struct dm_config_tree *cft, time_t *when, char **desc)
{
const char *str;
unsigned int u = 0u;
if (!dm_config_get_str(cft->root, "description", &str))
str = "";
*desc = dm_pool_strdup(mem, str);
(void) dm_config_get_uint32(cft->root, "creation_time", &u);
*when = u;
}
/*
* It is used to read vgsummary information about a VG
* before locking and reading the VG via vg_read().
* read_vgsummary: read VG metadata before VG is locked
* and save the data in struct vgsummary
* read_vg: read VG metadata after VG is locked
* and save the data in struct volume_group
* FIXME: why are these separate?
*/
static int _read_vgsummary(const struct format_type *fmt, const struct dm_config_tree *cft,
struct lvmcache_vgsummary *vgsummary)
{
const struct dm_config_node *vgn;
struct dm_pool *mem = fmt->cmd->mem;
const char *str;
if (!dm_config_get_str(cft->root, "creation_host", &str))
str = "";
if (!(vgsummary->creation_host = dm_pool_strdup(mem, str)))
return_0;
/* skip any top-level values */
for (vgn = cft->root; (vgn && vgn->v); vgn = vgn->sib) ;
if (!vgn) {
log_error("Couldn't find volume group in file.");
return 0;
}
if (!(vgsummary->vgname = dm_pool_strdup(mem, vgn->key)))
return_0;
vgn = vgn->child;
if (!_read_id(&vgsummary->vgid, vgn, "id")) {
log_error("Couldn't read uuid for volume group %s.", vgsummary->vgname);
return 0;
}
if (!_read_flag_config(vgn, &vgsummary->vgstatus, VG_FLAGS)) {
log_error("Couldn't find status flags for volume group %s.",
vgsummary->vgname);
return 0;
}
if (dm_config_get_str(vgn, "system_id", &str) &&
(!(vgsummary->system_id = dm_pool_strdup(mem, str))))
return_0;
if (dm_config_get_str(vgn, "lock_type", &str) &&
(!(vgsummary->lock_type = dm_pool_strdup(mem, str))))
return_0;
if (!_read_int32(vgn, "seqno", &vgsummary->seqno)) {
log_error("Couldn't read seqno for volume group %s.",
vgsummary->vgname);
return 0;
}
if (!_read_sections(fmt->cmd, NULL, NULL, mem, "physical_volumes", _read_pvsummary, NULL, vgsummary,
vgn, NULL, NULL, 0)) {
log_debug("Couldn't read pv summaries");
}
return 1;
}
static struct text_vg_version_ops _vsn1_ops = {
.check_version = _vsn1_check_version,
.read_vg = _read_vg,
.read_desc = _read_desc,
.read_vgsummary = _read_vgsummary
};
struct text_vg_version_ops *text_vg_vsn1_init(void)
{
return &_vsn1_ops;
}
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