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lvm2/lib/metadata/lv.c
2012-01-24 00:55:03 +00:00

554 lines
13 KiB
C

/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2012 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "lib.h"
#include "metadata.h"
#include "display.h"
#include "activate.h"
#include "toolcontext.h"
#include "segtype.h"
#include "str_list.h"
#include <time.h>
#include <sys/utsname.h>
static struct utsname _utsname;
static int _utsinit = 0;
static char *_format_pvsegs(struct dm_pool *mem, const struct lv_segment *seg,
int range_format)
{
unsigned int s;
const char *name = NULL;
uint32_t extent = 0;
char extent_str[32];
if (!dm_pool_begin_object(mem, 256)) {
log_error("dm_pool_begin_object failed");
return NULL;
}
for (s = 0; s < seg->area_count; s++) {
switch (seg_type(seg, s)) {
case AREA_LV:
name = seg_lv(seg, s)->name;
extent = seg_le(seg, s);
break;
case AREA_PV:
name = dev_name(seg_dev(seg, s));
extent = seg_pe(seg, s);
break;
case AREA_UNASSIGNED:
name = "unassigned";
extent = 0;
}
if (!dm_pool_grow_object(mem, name, strlen(name))) {
log_error("dm_pool_grow_object failed");
return NULL;
}
if (dm_snprintf(extent_str, sizeof(extent_str),
"%s%" PRIu32 "%s",
range_format ? ":" : "(", extent,
range_format ? "-" : ")") < 0) {
log_error("Extent number dm_snprintf failed");
return NULL;
}
if (!dm_pool_grow_object(mem, extent_str, strlen(extent_str))) {
log_error("dm_pool_grow_object failed");
return NULL;
}
if (range_format) {
if (dm_snprintf(extent_str, sizeof(extent_str),
"%" PRIu32, extent + seg->area_len - 1) < 0) {
log_error("Extent number dm_snprintf failed");
return NULL;
}
if (!dm_pool_grow_object(mem, extent_str, strlen(extent_str))) {
log_error("dm_pool_grow_object failed");
return NULL;
}
}
if ((s != seg->area_count - 1) &&
!dm_pool_grow_object(mem, range_format ? " " : ",", 1)) {
log_error("dm_pool_grow_object failed");
return NULL;
}
}
if (!dm_pool_grow_object(mem, "\0", 1)) {
log_error("dm_pool_grow_object failed");
return NULL;
}
return dm_pool_end_object(mem);
}
char *lvseg_devices(struct dm_pool *mem, const struct lv_segment *seg)
{
return _format_pvsegs(mem, seg, 0);
}
char *lvseg_seg_pe_ranges(struct dm_pool *mem, const struct lv_segment *seg)
{
return _format_pvsegs(mem, seg, 1);
}
char *lvseg_tags_dup(const struct lv_segment *seg)
{
return tags_format_and_copy(seg->lv->vg->vgmem, &seg->tags);
}
char *lvseg_segtype_dup(struct dm_pool *mem, const struct lv_segment *seg)
{
return dm_pool_strdup(mem, seg->segtype->ops->name(seg));
}
uint64_t lvseg_chunksize(const struct lv_segment *seg)
{
uint64_t size;
if (lv_is_cow(seg->lv))
size = (uint64_t) find_cow(seg->lv)->chunk_size;
else if (lv_is_thin_pool(seg->lv))
size = (uint64_t) seg->chunk_size;
else
size = UINT64_C(0);
return size;
}
uint64_t lvseg_start(const struct lv_segment *seg)
{
return (uint64_t) seg->le * seg->lv->vg->extent_size;
}
uint64_t lvseg_size(const struct lv_segment *seg)
{
return (uint64_t) seg->len * seg->lv->vg->extent_size;
}
uint32_t lv_kernel_read_ahead(const struct logical_volume *lv)
{
struct lvinfo info;
if (!lv_info(lv->vg->cmd, lv, 0, &info, 0, 1) || !info.exists)
return UINT32_MAX;
return info.read_ahead;
}
char *lv_origin_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
if (lv_is_cow(lv))
return lv_name_dup(mem, origin_from_cow(lv));
return NULL;
}
char *lv_name_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
return dm_pool_strdup(mem, lv->name);
}
char *lv_modules_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
struct dm_list *modules;
if (!(modules = str_list_create(mem))) {
log_error("modules str_list allocation failed");
return NULL;
}
if (!list_lv_modules(mem, lv, modules))
return_NULL;
return tags_format_and_copy(mem, modules);
}
char *lv_mirror_log_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
struct lv_segment *seg;
dm_list_iterate_items(seg, &lv->segments)
if (seg_is_mirrored(seg) && seg->log_lv)
return dm_pool_strdup(mem, seg->log_lv->name);
return NULL;
}
char *lv_pool_lv_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
struct lv_segment *seg;
dm_list_iterate_items(seg, &lv->segments)
if (seg_is_thin_volume(seg) && seg->pool_lv)
return dm_pool_strdup(mem, seg->pool_lv->name);
return NULL;
}
char *lv_data_lv_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
return lv_is_thin_pool(lv) ?
dm_pool_strdup(mem, seg_lv(first_seg(lv), 0)->name) : NULL;
}
char *lv_metadata_lv_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
return lv_is_thin_pool(lv) ?
dm_pool_strdup(mem, first_seg(lv)->metadata_lv->name) : NULL;
}
int lv_kernel_minor(const struct logical_volume *lv)
{
struct lvinfo info;
if (lv_info(lv->vg->cmd, lv, 0, &info, 0, 0) && info.exists)
return info.minor;
return -1;
}
int lv_kernel_major(const struct logical_volume *lv)
{
struct lvinfo info;
if (lv_info(lv->vg->cmd, lv, 0, &info, 0, 0) && info.exists)
return info.major;
return -1;
}
char *lv_convert_lv_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
struct lv_segment *seg;
if (lv->status & (CONVERTING|MIRRORED)) {
seg = first_seg(lv);
/* Temporary mirror is always area_num == 0 */
if (seg_type(seg, 0) == AREA_LV &&
is_temporary_mirror_layer(seg_lv(seg, 0)))
return dm_pool_strdup(mem, seg_lv(seg, 0)->name);
}
return NULL;
}
char *lv_move_pv_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
struct lv_segment *seg;
dm_list_iterate_items(seg, &lv->segments) {
if (seg->status & PVMOVE)
return dm_pool_strdup(mem, dev_name(seg_dev(seg, 0)));
}
return NULL;
}
uint64_t lv_origin_size(const struct logical_volume *lv)
{
if (lv_is_cow(lv))
return (uint64_t) find_cow(lv)->len * lv->vg->extent_size;
if (lv_is_origin(lv))
return lv->size;
return 0;
}
uint64_t lv_metadata_size(const struct logical_volume *lv)
{
return lv_is_thin_pool(lv) ? first_seg(lv)->metadata_lv->size : 0;
}
char *lv_path_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
char *repstr;
size_t len;
if (!*lv->vg->name)
return dm_pool_strdup(mem, "");
len = strlen(lv->vg->cmd->dev_dir) + strlen(lv->vg->name) +
strlen(lv->name) + 2;
if (!(repstr = dm_pool_zalloc(mem, len))) {
log_error("dm_pool_alloc failed");
return 0;
}
if (dm_snprintf(repstr, len, "%s%s/%s",
lv->vg->cmd->dev_dir, lv->vg->name, lv->name) < 0) {
log_error("lvpath snprintf failed");
return 0;
}
return repstr;
}
char *lv_uuid_dup(const struct logical_volume *lv)
{
return id_format_and_copy(lv->vg->vgmem, &lv->lvid.id[1]);
}
char *lv_tags_dup(const struct logical_volume *lv)
{
return tags_format_and_copy(lv->vg->vgmem, &lv->tags);
}
uint64_t lv_size(const struct logical_volume *lv)
{
return lv->size;
}
static int _lv_mimage_in_sync(const struct logical_volume *lv)
{
percent_t percent;
struct lv_segment *mirror_seg = find_mirror_seg(first_seg(lv));
if (!(lv->status & MIRROR_IMAGE) || !mirror_seg)
return_0;
if (!lv_mirror_percent(lv->vg->cmd, mirror_seg->lv, 0, &percent,
NULL))
return_0;
return (percent == PERCENT_100) ? 1 : 0;
}
static int _lv_raid_image_in_sync(const struct logical_volume *lv)
{
percent_t percent;
struct lv_segment *raid_seg;
if (!(lv->status & RAID_IMAGE)) {
log_error(INTERNAL_ERROR "%s is not a RAID image", lv->name);
return 0;
}
raid_seg = get_only_segment_using_this_lv(first_seg(lv)->lv);
if (!raid_seg) {
log_error("Failed to find RAID segment for %s", lv->name);
return 0;
}
if (!seg_is_raid(raid_seg)) {
log_error("%s on %s is not a RAID segment",
raid_seg->lv->name, lv->name);
return 0;
}
if (!lv_raid_percent(raid_seg->lv, &percent))
return_0;
if (percent == PERCENT_100)
return 1;
/*
* FIXME: Get individual RAID image status.
* The status health characters reported from a RAID target
* indicate whether the whole array or just individual devices
* are in-sync. If the corresponding character for this image
* was 'A', we could report a more accurate status. This is
* especially so in the case of failures or rebuildings.
*
* We need to test the health characters anyway to report
* the correct 4th attr character. Just need to figure out
* where to put this functionality.
*/
return 0;
}
char *lv_attr_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
percent_t snap_percent;
struct lvinfo info;
struct lv_segment *seg;
char *repstr;
if (!(repstr = dm_pool_zalloc(mem, 9))) {
log_error("dm_pool_alloc failed");
return 0;
}
/* Blank if this is a "free space" LV. */
if (!*lv->name)
goto out;
if (lv->status & PVMOVE)
repstr[0] = 'p';
else if (lv->status & CONVERTING)
repstr[0] = 'c';
/* Origin takes precedence over mirror and thin volume */
else if (lv_is_origin(lv))
repstr[0] = (lv_is_merging_origin(lv)) ? 'O' : 'o';
else if (lv->status & RAID)
repstr[0] = (lv->status & LV_NOTSYNCED) ? 'R' : 'r';
else if (lv->status & MIRRORED)
repstr[0] = (lv->status & LV_NOTSYNCED) ? 'M' : 'm';
else if (lv_is_thin_volume(lv))
repstr[0] = 'V';
else if (lv->status & VIRTUAL)
repstr[0] = 'v';
else if (lv_is_thin_pool(lv))
repstr[0] = 't';
else if (lv_is_thin_pool_data(lv))
repstr[0] = 'T';
else if (lv_is_thin_pool_metadata(lv) || (lv->status & RAID_META))
repstr[0] = 'e';
else if (lv->status & MIRROR_IMAGE)
repstr[0] = (_lv_mimage_in_sync(lv)) ? 'i' : 'I';
else if (lv->status & RAID_IMAGE)
repstr[0] = (_lv_raid_image_in_sync(lv)) ? 'i' : 'I';
else if (lv->status & MIRROR_LOG)
repstr[0] = 'l';
else if (lv_is_cow(lv)) {
repstr[0] = (lv_is_merging_cow(lv)) ? 'S' : 's';
} else
repstr[0] = '-';
if (lv->status & PVMOVE)
repstr[1] = '-';
else if (lv->status & LVM_WRITE)
repstr[1] = 'w';
else if (lv->status & LVM_READ)
repstr[1] = 'r';
else
repstr[1] = '-';
repstr[2] = alloc_policy_char(lv->alloc);
if (lv->status & LOCKED)
repstr[2] = toupper(repstr[2]);
repstr[3] = (lv->status & FIXED_MINOR) ? 'm' : '-';
if (lv_info(lv->vg->cmd, lv, 0, &info, 1, 0) && info.exists) {
if (info.suspended)
repstr[4] = 's'; /* Suspended */
else if (info.live_table)
repstr[4] = 'a'; /* Active */
else if (info.inactive_table)
repstr[4] = 'i'; /* Inactive with table */
else
repstr[4] = 'd'; /* Inactive without table */
/* Snapshot dropped? */
if (info.live_table && lv_is_cow(lv)) {
if (!lv_snapshot_percent(lv, &snap_percent) ||
snap_percent == PERCENT_INVALID) {
repstr[0] = toupper(repstr[0]);
if (info.suspended)
repstr[4] = 'S'; /* Susp Inv snapshot */
else
repstr[4] = 'I'; /* Invalid snapshot */
}
else if (snap_percent == PERCENT_MERGE_FAILED) {
if (info.suspended)
repstr[4] = 'M'; /* Susp snapshot merge failed */
else
repstr[4] = 'm'; /* snapshot merge failed */
}
}
/*
* 'R' indicates read-only activation of a device that
* does not have metadata flagging it as read-only.
*/
if (repstr[1] != 'r' && info.read_only)
repstr[1] = 'R';
repstr[5] = (info.open_count) ? 'o' : '-';
} else {
repstr[4] = '-';
repstr[5] = '-';
}
if (lv_is_thin_type(lv))
repstr[6] = 't';
else if (lv_is_mirror_type(lv))
repstr[6] = 'm';
else if (lv_is_raid_type(lv))
repstr[6] = 'r';
else if (lv_is_cow(lv) || lv_is_origin(lv))
repstr[6] = 's';
else if (lv_has_unknown_segments(lv))
repstr[6] = 'u';
else if (lv_is_virtual(lv))
repstr[6] = 'v';
else
repstr[6] = '-';
if (((lv_is_thin_volume(lv) && (seg = first_seg(lv)) && seg->pool_lv && (seg = first_seg(seg->pool_lv))) ||
(lv_is_thin_pool(lv) && (seg = first_seg(lv)))) &&
seg->zero_new_blocks)
repstr[7] = 'z';
else
repstr[7] = '-';
out:
return repstr;
}
int lv_set_creation(struct logical_volume *lv,
const char *hostname, uint64_t timestamp)
{
const char *hn;
if (!hostname) {
if (!_utsinit) {
if (uname(&_utsname)) {
log_error("uname failed: %s", strerror(errno));
memset(&_utsname, 0, sizeof(_utsname));
}
_utsinit = 1;
}
hostname = _utsname.nodename;
}
if (!(hn = dm_hash_lookup(lv->vg->hostnames, hostname))) {
if (!(hn = dm_pool_strdup(lv->vg->vgmem, hostname))) {
log_error("Failed to duplicate hostname");
return 0;
}
if (!dm_hash_insert(lv->vg->hostnames, hostname, (void*)hn))
return_0;
}
lv->hostname = hn;
lv->timestamp = timestamp ? : time(NULL);
return 1;
}
char *lv_time_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
char buffer[50];
struct tm *local_tm;
time_t ts = (time_t)lv->timestamp;
if (!ts ||
!(local_tm = localtime(&ts)) ||
/* FIXME: make this lvm.conf configurable */
!strftime(buffer, sizeof(buffer),
"%Y-%m-%d %T %z", local_tm))
buffer[0] = 0;
return dm_pool_strdup(mem, buffer);
}
char *lv_host_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
return dm_pool_strdup(mem, lv->hostname ? : "");
}