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lvm.c
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lvm.c
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/*
* Copyright (C) 2014 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Vratislav Podzimek <vpodzime@redhat.com>
*/
#include <glib.h>
#include <math.h>
#include <string.h>
#include <unistd.h>
#include <blockdev/utils.h>
#include <libdevmapper.h>
#include "lvm.h"
#include "check_deps.h"
#include "dm_logging.h"
#include "vdo_stats.h"
#define INT_FLOAT_EPS 1e-5
#define SECTOR_SIZE 512
#define VDO_POOL_SUFFIX "vpool"
#define DEFAULT_PE_SIZE (4 MiB)
#define USE_DEFAULT_PE_SIZE 0
#define RESOLVE_PE_SIZE(size) ((size) == USE_DEFAULT_PE_SIZE ? DEFAULT_PE_SIZE : (size))
#define THPOOL_MD_FACTOR_NEW (0.2)
#define THPOOL_MD_FACTOR_EXISTS (1 / 6.0)
#define MIN_PE_SIZE (1 KiB)
#define MAX_PE_SIZE (16 GiB)
#define MIN_THPOOL_MD_SIZE (4 MiB)
/* DM_THIN_MAX_METADATA_SIZE is in 512 sectors */
#define MAX_THPOOL_MD_SIZE (DM_THIN_MAX_METADATA_SIZE * 512)
#define MIN_THPOOL_CHUNK_SIZE (64 KiB)
#define MAX_THPOOL_CHUNK_SIZE (1 GiB)
#define DEFAULT_CHUNK_SIZE (64 KiB)
/* according to lvmcache (7) */
#define MIN_CACHE_MD_SIZE (8 MiB)
#ifdef __LP64__
/* 64bit system */
#define MAX_LV_SIZE (8 EiB)
#else
/* 32bit system */
#define MAX_LV_SIZE (16 TiB)
#endif
#define LVM_MIN_VERSION "2.02.116"
#define LVM_VERSION_FSRESIZE "2.03.19"
static GMutex global_config_lock;
static gchar *global_config_str = NULL;
static gchar *global_devices_str = NULL;
/**
* SECTION: lvm
* @short_description: plugin for operations with LVM
* @title: LVM
* @include: lvm.h
*
* A plugin for operations with LVM. All sizes passed in/out to/from
* the functions are in bytes.
*/
/**
* bd_lvm_error_quark: (skip)
*/
GQuark bd_lvm_error_quark (void)
{
return g_quark_from_static_string ("g-bd-lvm-error-quark");
}
BDLVMPVdata* bd_lvm_pvdata_copy (BDLVMPVdata *data) {
if (data == NULL)
return NULL;
BDLVMPVdata *new_data = g_new0 (BDLVMPVdata, 1);
new_data->pv_name = g_strdup (data->pv_name);
new_data->pv_uuid = g_strdup (data->pv_uuid);
new_data->pv_free = data->pv_free;
new_data->pv_size = data->pv_size;
new_data->pe_start = data->pe_start;
new_data->vg_name = g_strdup (data->vg_name);
new_data->vg_uuid = g_strdup (data->vg_uuid);
new_data->vg_size = data->vg_size;
new_data->vg_free = data->vg_free;
new_data->vg_extent_size = data->vg_extent_size;
new_data->vg_extent_count = data->vg_extent_count;
new_data->vg_free_count = data->vg_free_count;
new_data->vg_pv_count = data->vg_pv_count;
new_data->pv_tags = g_strdupv (data->pv_tags);
new_data->missing = data->missing;
return new_data;
}
void bd_lvm_pvdata_free (BDLVMPVdata *data) {
if (data == NULL)
return;
g_free (data->pv_name);
g_free (data->pv_uuid);
g_free (data->vg_name);
g_free (data->vg_uuid);
g_strfreev (data->pv_tags);
g_free (data);
}
BDLVMVGdata* bd_lvm_vgdata_copy (BDLVMVGdata *data) {
if (data == NULL)
return NULL;
BDLVMVGdata *new_data = g_new0 (BDLVMVGdata, 1);
new_data->name = g_strdup (data->name);
new_data->uuid = g_strdup (data->uuid);
new_data->size = data->size;
new_data->free = data->free;
new_data->extent_size = data->extent_size;
new_data->extent_count = data->extent_count;
new_data->free_count = data->free_count;
new_data->pv_count = data->pv_count;
new_data->vg_tags = g_strdupv (data->vg_tags);
return new_data;
}
void bd_lvm_vgdata_free (BDLVMVGdata *data) {
if (data == NULL)
return;
g_free (data->name);
g_free (data->uuid);
g_strfreev (data->vg_tags);
g_free (data);
}
BDLVMSEGdata* bd_lvm_segdata_copy (BDLVMSEGdata *data) {
if (data == NULL)
return NULL;
BDLVMSEGdata *new_data = g_new0 (BDLVMSEGdata, 1);
new_data->size_pe = data->size_pe;
new_data->pv_start_pe = data->pv_start_pe;
new_data->pvdev = g_strdup (data->pvdev);
return new_data;
}
void bd_lvm_segdata_free (BDLVMSEGdata *data) {
if (data == NULL)
return;
g_free (data->pvdev);
g_free (data);
}
static BDLVMSEGdata **copy_segs (BDLVMSEGdata **segs) {
int len;
BDLVMSEGdata **new_segs;
if (segs == NULL)
return NULL;
for (len = 0; segs[len]; len++)
;
new_segs = g_new0 (BDLVMSEGdata *, len+1);
for (int i = 0; i < len; i++)
new_segs[i] = bd_lvm_segdata_copy (segs[i]);
return new_segs;
}
static void free_segs (BDLVMSEGdata **segs) {
if (segs == NULL)
return;
for (int i = 0; segs[i]; i++)
bd_lvm_segdata_free (segs[i]);
(g_free) (segs);
}
BDLVMLVdata* bd_lvm_lvdata_copy (BDLVMLVdata *data) {
if (data == NULL)
return NULL;
BDLVMLVdata *new_data = g_new0 (BDLVMLVdata, 1);
new_data->lv_name = g_strdup (data->lv_name);
new_data->vg_name = g_strdup (data->vg_name);
new_data->uuid = g_strdup (data->uuid);
new_data->size = data->size;
new_data->attr = g_strdup (data->attr);
new_data->segtype = g_strdup (data->segtype);
new_data->origin = g_strdup (data->origin);
new_data->pool_lv = g_strdup (data->pool_lv);
new_data->data_lv = g_strdup (data->data_lv);
new_data->metadata_lv = g_strdup (data->metadata_lv);
new_data->roles = g_strdup (data->roles);
new_data->move_pv = g_strdup (data->move_pv);
new_data->data_percent = data->data_percent;
new_data->metadata_percent = data->metadata_percent;
new_data->copy_percent = data->copy_percent;
new_data->lv_tags = g_strdupv (data->lv_tags);
new_data->data_lvs = g_strdupv (data->data_lvs);
new_data->metadata_lvs = g_strdupv (data->metadata_lvs);
new_data->segs = copy_segs (data->segs);
return new_data;
}
void bd_lvm_lvdata_free (BDLVMLVdata *data) {
if (data == NULL)
return;
g_free (data->lv_name);
g_free (data->vg_name);
g_free (data->uuid);
g_free (data->attr);
g_free (data->segtype);
g_free (data->origin);
g_free (data->pool_lv);
g_free (data->data_lv);
g_free (data->metadata_lv);
g_free (data->roles);
g_free (data->move_pv);
g_strfreev (data->lv_tags);
g_strfreev (data->data_lvs);
g_strfreev (data->metadata_lvs);
free_segs (data->segs);
g_free (data);
}
BDLVMVDOPooldata* bd_lvm_vdopooldata_copy (BDLVMVDOPooldata *data) {
if (data == NULL)
return NULL;
BDLVMVDOPooldata *new_data = g_new0 (BDLVMVDOPooldata, 1);
new_data->operating_mode = data->operating_mode;
new_data->compression_state = data->compression_state;
new_data->index_state = data->index_state;
new_data->write_policy = data->write_policy;
new_data->used_size = data->used_size;
new_data->saving_percent = data->saving_percent;
new_data->index_memory_size = data->index_memory_size;
new_data->deduplication = data->deduplication;
new_data->compression = data->compression;
return new_data;
}
void bd_lvm_vdopooldata_free (BDLVMVDOPooldata *data) {
if (data == NULL)
return;
g_free (data);
}
BDLVMCacheStats* bd_lvm_cache_stats_copy (BDLVMCacheStats *data) {
if (data == NULL)
return NULL;
BDLVMCacheStats *new = g_new0 (BDLVMCacheStats, 1);
new->block_size = data->block_size;
new->cache_size = data->cache_size;
new->cache_used = data->cache_used;
new->md_block_size = data->md_block_size;
new->md_size = data->md_size;
new->md_used = data->md_used;
new->read_hits = data->read_hits;
new->read_misses = data->read_misses;
new->write_hits = data->write_hits;
new->write_misses = data->write_misses;
new->mode = data->mode;
return new;
}
void bd_lvm_cache_stats_free (BDLVMCacheStats *data) {
g_free (data);
}
static volatile guint avail_deps = 0;
static volatile guint avail_features = 0;
static volatile guint avail_module_deps = 0;
static GMutex deps_check_lock;
#define DEPS_LVM 0
#define DEPS_LVM_MASK (1 << DEPS_LVM)
#define DEPS_LVMDEVICES 1
#define DEPS_LVMDEVICES_MASK (1 << DEPS_LVMDEVICES)
#define DEPS_LAST 2
static const UtilDep deps[DEPS_LAST] = {
{"lvm", LVM_MIN_VERSION, "version", "LVM version:\\s+([\\d\\.]+)"},
{"lvmdevices", NULL, NULL, NULL},
};
#define FEATURES_VDO 0
#define FEATURES_VDO_MASK (1 << FEATURES_VDO)
#define FEATURES_WRITECACHE 0
#define FEATURES_WRITECACHE_MASK (1 << FEATURES_WRITECACHE)
#define FEATURES_LAST 2
static const UtilFeatureDep features[FEATURES_LAST] = {
{"lvm", "vdo", "segtypes", NULL},
{"lvm", "writecache", "segtypes", NULL},
};
#define MODULE_DEPS_VDO 0
#define MODULE_DEPS_VDO_MASK (1 << MODULE_DEPS_VDO)
#define MODULE_DEPS_LAST 1
static const gchar*const module_deps[MODULE_DEPS_LAST] = { "dm-vdo" };
/**
* bd_lvm_init:
*
* Initializes the plugin. **This function is called automatically by the
* library's initialization functions.**
*
*/
gboolean bd_lvm_init (void) {
dm_log_with_errno_init ((dm_log_with_errno_fn) redirect_dm_log);
#ifdef DEBUG
dm_log_init_verbose (LOG_DEBUG);
#else
dm_log_init_verbose (LOG_INFO);
#endif
return TRUE;
};
/**
* bd_lvm_close:
*
* Cleans up after the plugin. **This function is called automatically by the
* library's functions that unload it.**
*
*/
void bd_lvm_close (void) {
dm_log_with_errno_init (NULL);
dm_log_init_verbose (0);
}
/**
* bd_lvm_is_tech_avail:
* @tech: the queried tech
* @mode: a bit mask of queried modes of operation (#BDLVMTechMode) for @tech
* @error: (out) (optional): place to store error (details about why the @tech-@mode combination is not available)
*
* Returns: whether the @tech-@mode combination is available -- supported by the
* plugin implementation and having all the runtime dependencies available
*/
gboolean bd_lvm_is_tech_avail (BDLVMTech tech, guint64 mode, GError **error) {
switch (tech) {
case BD_LVM_TECH_THIN_CALCS:
if (mode & ~BD_LVM_TECH_MODE_QUERY) {
g_set_error (error, BD_LVM_ERROR, BD_LVM_ERROR_TECH_UNAVAIL,
"Only 'query' supported for thin calculations");
return FALSE;
} else
return TRUE;
case BD_LVM_TECH_CALCS:
if (mode & ~BD_LVM_TECH_MODE_QUERY) {
g_set_error (error, BD_LVM_ERROR, BD_LVM_ERROR_TECH_UNAVAIL,
"Only 'query' supported for calculations");
return FALSE;
} else
return TRUE;
case BD_LVM_TECH_VDO:
return check_features (&avail_features, FEATURES_VDO_MASK, features, FEATURES_LAST, &deps_check_lock, error) &&
check_module_deps (&avail_module_deps, MODULE_DEPS_VDO_MASK, module_deps, MODULE_DEPS_LAST, &deps_check_lock, error) &&
check_deps (&avail_deps, DEPS_LVM_MASK, deps, DEPS_LAST, &deps_check_lock, error);
case BD_LVM_TECH_WRITECACHE:
return check_features (&avail_features, FEATURES_WRITECACHE_MASK, features, FEATURES_LAST, &deps_check_lock, error) &&
check_deps (&avail_deps, DEPS_LVM_MASK, deps, DEPS_LAST, &deps_check_lock, error);
case BD_LVM_TECH_DEVICES:
return check_deps (&avail_deps, DEPS_LVMDEVICES_MASK, deps, DEPS_LAST, &deps_check_lock, error);
default:
/* everything is supported by this implementation of the plugin */
return check_deps (&avail_deps, DEPS_LVM_MASK, deps, DEPS_LAST, &deps_check_lock, error);
}
}
static gboolean call_lvm_and_report_error (const gchar **args, const BDExtraArg **extra, gboolean lock_config, GError **error) {
gboolean success = FALSE;
guint i = 0;
guint args_length = g_strv_length ((gchar **) args);
g_autofree gchar *config_arg = NULL;
g_autofree gchar *devices_arg = NULL;
if (!check_deps (&avail_deps, DEPS_LVM_MASK, deps, DEPS_LAST, &deps_check_lock, error))
return FALSE;
/* don't allow global config string changes during the run */
if (lock_config)
g_mutex_lock (&global_config_lock);
/* allocate enough space for the args plus "lvm", "--config", "--devices" and NULL */
const gchar **argv = g_new0 (const gchar*, args_length + 4);
/* construct argv from args with "lvm" prepended */
argv[0] = "lvm";
for (i=0; i < args_length; i++)
argv[i+1] = args[i];
if (global_config_str) {
config_arg = g_strdup_printf ("--config=%s", global_config_str);
argv[++args_length] = config_arg;
}
if (global_devices_str) {
devices_arg = g_strdup_printf ("--devices=%s", global_devices_str);
argv[++args_length] = devices_arg;
}
argv[++args_length] = NULL;
success = bd_utils_exec_and_report_error (argv, extra, error);
if (lock_config)
g_mutex_unlock (&global_config_lock);
g_free (argv);
return success;
}
static gboolean call_lvm_and_capture_output (const gchar **args, const BDExtraArg **extra, gchar **output, GError **error) {
gboolean success = FALSE;
guint i = 0;
guint args_length = g_strv_length ((gchar **) args);
g_autofree gchar *config_arg = NULL;
g_autofree gchar *devices_arg = NULL;
if (!check_deps (&avail_deps, DEPS_LVM_MASK, deps, DEPS_LAST, &deps_check_lock, error))
return FALSE;
/* don't allow global config string changes during the run */
g_mutex_lock (&global_config_lock);
/* allocate enough space for the args plus "lvm", "--config", "--devices" and NULL */
const gchar **argv = g_new0 (const gchar*, args_length + 4);
/* construct argv from args with "lvm" prepended */
argv[0] = "lvm";
for (i=0; i < args_length; i++)
argv[i+1] = args[i];
if (global_config_str) {
config_arg = g_strdup_printf ("--config=%s", global_config_str);
argv[++args_length] = config_arg;
}
if (global_devices_str) {
devices_arg = g_strdup_printf ("--devices=%s", global_devices_str);
argv[++args_length] = devices_arg;
}
argv[++args_length] = NULL;
success = bd_utils_exec_and_capture_output (argv, extra, output, error);
g_mutex_unlock (&global_config_lock);
g_free (argv);
return success;
}
/**
* parse_lvm_vars:
* @str: string to parse
* @num_items: (out): number of parsed items
*
* Returns: (transfer full): a GHashTable containing key-value items parsed from the @string
*/
static GHashTable* parse_lvm_vars (const gchar *str, guint *num_items) {
GHashTable *table = NULL;
gchar **items = NULL;
gchar **item_p = NULL;
gchar **key_val = NULL;
table = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
*num_items = 0;
items = g_strsplit_set (str, " \t\n", 0);
for (item_p=items; *item_p; item_p++) {
key_val = g_strsplit (*item_p, "=", 2);
if (g_strv_length (key_val) == 2) {
/* we only want to process valid lines (with the '=' character) */
g_hash_table_insert (table, key_val[0], key_val[1]);
g_free (key_val);
(*num_items)++;
} else
/* invalid line, just free key_val */
g_strfreev (key_val);
}
g_strfreev (items);
return table;
}
static BDLVMPVdata* get_pv_data_from_table (GHashTable *table, gboolean free_table) {
BDLVMPVdata *data = g_new0 (BDLVMPVdata, 1);
gchar *value = NULL;
data->pv_name = g_strdup ((gchar*) g_hash_table_lookup (table, "LVM2_PV_NAME"));
data->pv_uuid = g_strdup ((gchar*) g_hash_table_lookup (table, "LVM2_PV_UUID"));
value = (gchar*) g_hash_table_lookup (table, "LVM2_PV_FREE");
if (value)
data->pv_free = g_ascii_strtoull (value, NULL, 0);
else
data->pv_free = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_PV_SIZE");
if (value)
data->pv_size = g_ascii_strtoull (value, NULL, 0);
else
data->pv_size = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_PE_START");
if (value)
data->pe_start = g_ascii_strtoull (value, NULL, 0);
else
data->pe_start = 0;
data->vg_name = g_strdup ((gchar*) g_hash_table_lookup (table, "LVM2_VG_NAME"));
data->vg_uuid = g_strdup ((gchar*) g_hash_table_lookup (table, "LVM2_VG_UUID"));
value = (gchar*) g_hash_table_lookup (table, "LVM2_VG_SIZE");
if (value)
data->vg_size = g_ascii_strtoull (value, NULL, 0);
else
data->vg_size = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VG_FREE");
if (value)
data->vg_free = g_ascii_strtoull (value, NULL, 0);
else
data->vg_free = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VG_EXTENT_SIZE");
if (value)
data->vg_extent_size = g_ascii_strtoull (value, NULL, 0);
else
data->vg_extent_size = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VG_EXTENT_COUNT");
if (value)
data->vg_extent_count = g_ascii_strtoull (value, NULL, 0);
else
data->vg_extent_count = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VG_FREE_COUNT");
if (value)
data->vg_free_count = g_ascii_strtoull (value, NULL, 0);
else
data->vg_free_count = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_PV_COUNT");
if (value)
data->vg_pv_count = g_ascii_strtoull (value, NULL, 0);
else
data->vg_pv_count = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_PV_TAGS");
if (value)
data->pv_tags = g_strsplit (value, ",", -1);
else
data->pv_tags = NULL;
value = (gchar*) g_hash_table_lookup (table, "LVM2_PV_MISSING");
data->missing = (g_strcmp0 (value, "missing") == 0);
if (free_table)
g_hash_table_destroy (table);
return data;
}
static BDLVMVGdata* get_vg_data_from_table (GHashTable *table, gboolean free_table) {
BDLVMVGdata *data = g_new0 (BDLVMVGdata, 1);
gchar *value = NULL;
data->name = g_strdup (g_hash_table_lookup (table, "LVM2_VG_NAME"));
data->uuid = g_strdup (g_hash_table_lookup (table, "LVM2_VG_UUID"));
value = (gchar*) g_hash_table_lookup (table, "LVM2_VG_SIZE");
if (value)
data->size = g_ascii_strtoull (value, NULL, 0);
else
data->size = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VG_FREE");
if (value)
data->free = g_ascii_strtoull (value, NULL, 0);
else
data->free= 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VG_EXTENT_SIZE");
if (value)
data->extent_size = g_ascii_strtoull (value, NULL, 0);
else
data->extent_size = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VG_EXTENT_COUNT");
if (value)
data->extent_count = g_ascii_strtoull (value, NULL, 0);
else
data->extent_count = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VG_FREE_COUNT");
if (value)
data->free_count = g_ascii_strtoull (value, NULL, 0);
else
data->free_count = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_PV_COUNT");
if (value)
data->pv_count = g_ascii_strtoull (value, NULL, 0);
else
data->pv_count = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VG_EXPORTED");
if (value && g_strcmp0 (value, "exported") == 0)
data->exported = TRUE;
else
data->exported = FALSE;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VG_TAGS");
if (value)
data->vg_tags = g_strsplit (value, ",", -1);
else
data->vg_tags = NULL;
if (free_table)
g_hash_table_destroy (table);
return data;
}
static gchar **prepare_sublvs (gchar **values, gchar *extra_value) {
/* LVM2 guarantees: No "/dev/" prefixes or "[unknown]" in a list of sub-lvs. */
gboolean found_extra = FALSE;
for (int i = 0; values[i]; i++) {
gchar *paren = strrchr (values[i], '(');
if (paren) {
/* LVM2 guarantees: start offsets of sub-lvs are always zero. */
*paren = '\0';
}
if (g_strcmp0 (extra_value, values[i]) == 0)
found_extra = TRUE;
}
if (extra_value && *extra_value && !found_extra) {
int len = g_strv_length (values);
gchar **new_values = g_new0 (gchar *, len+2);
for (int j = 0; j < len; j++)
new_values[j] = values[j];
new_values[len] = g_strdup (extra_value);
g_free (values);
values = new_values;
}
return values;
}
static BDLVMLVdata* get_lv_data_from_table (GHashTable *table, gboolean free_table) {
BDLVMLVdata *data = g_new0 (BDLVMLVdata, 1);
gchar *value = NULL;
data->lv_name = g_strdup (g_hash_table_lookup (table, "LVM2_LV_NAME"));
data->vg_name = g_strdup (g_hash_table_lookup (table, "LVM2_VG_NAME"));
data->uuid = g_strdup (g_hash_table_lookup (table, "LVM2_LV_UUID"));
value = (gchar*) g_hash_table_lookup (table, "LVM2_LV_SIZE");
if (value)
data->size = g_ascii_strtoull (value, NULL, 0);
else
data->size = 0;
data->attr = g_strdup (g_hash_table_lookup (table, "LVM2_LV_ATTR"));
value = g_hash_table_lookup (table, "LVM2_SEGTYPE");
if (g_strcmp0 (value, "error") == 0) {
/* A segment type "error" appears when "vgreduce
* --removemissing" replaces a missing PV with a device mapper
* "error" target. It very likely was a "linear" segment before that
* and will again be "linear" after repair. Let's not expose
* this implementation detail.
*/
value = "linear";
}
data->segtype = g_strdup (value);
data->origin = g_strdup (g_hash_table_lookup (table, "LVM2_ORIGIN"));
data->pool_lv = g_strdup (g_hash_table_lookup (table, "LVM2_POOL_LV"));
data->data_lv = g_strdup (g_hash_table_lookup (table, "LVM2_DATA_LV"));
data->metadata_lv = g_strdup (g_hash_table_lookup (table, "LVM2_METADATA_LV"));
data->roles = g_strdup (g_hash_table_lookup (table, "LVM2_LV_ROLE"));
data->move_pv = g_strdup (g_hash_table_lookup (table, "LVM2_MOVE_PV"));
value = (gchar*) g_hash_table_lookup (table, "LVM2_DATA_PERCENT");
if (value)
data->data_percent = g_ascii_strtoull (value, NULL, 0);
else
data->data_percent = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_METADATA_PERCENT");
if (value)
data->metadata_percent = g_ascii_strtoull (value, NULL, 0);
else
data->metadata_percent = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_COPY_PERCENT");
if (value)
data->copy_percent = g_ascii_strtoull (value, NULL, 0);
else
data->copy_percent = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_LV_TAGS");
if (value)
data->lv_tags = g_strsplit (value, ",", -1);
else
data->lv_tags = NULL;
/* replace '[' and ']' (marking LVs as internal) with spaces and then
remove all the leading and trailing whitespace */
g_strstrip (g_strdelimit (data->pool_lv, "[]", ' '));
g_strstrip (g_strdelimit (data->data_lv, "[]", ' '));
g_strstrip (g_strdelimit (data->metadata_lv, "[]", ' '));
value = (gchar*) g_hash_table_lookup (table, "LVM2_DEVICES");
if (value) {
gchar **values = g_strsplit (value, ",", -1);
/* If values starts with "/dev/", we have a single PV.
If the list is empty, this is probably an "error" segment
resulting from a "vgreduce --removemissing" operation.
If the value starts with "[unknown]", it is a segment with a
missing PV that hasn't been converted to an "error" segment
yet.
Otherwise it is a list of sub-lvs.
LVM2 guarantees: only one entry if the first is a PV
Additional segments are added in merge_lv_data below.
*/
if (!values[0] || g_str_has_prefix (values[0], "[unknown]")) {
data->segs = g_new0 (BDLVMSEGdata *, 1);
data->segs[0] = NULL;
g_strfreev (values);
} else if (g_str_has_prefix (values[0], "/dev/")) {
data->segs = g_new0 (BDLVMSEGdata *, 2);
data->segs[0] = g_new0 (BDLVMSEGdata, 1);
data->segs[1] = NULL;
gchar *paren = strrchr (values[0], '(');
if (paren) {
data->segs[0]->pv_start_pe = atoi (paren+1);
*paren = '\0';
}
data->segs[0]->pvdev = g_strdup (values[0]);
value = (gchar*) g_hash_table_lookup (table, "LVM2_SEG_SIZE_PE");
if (value)
data->segs[0]->size_pe = g_ascii_strtoull (value, NULL, 0);
g_strfreev (values);
} else {
data->data_lvs = prepare_sublvs (values, data->data_lv);
value = (gchar*) g_hash_table_lookup (table, "LVM2_METADATA_DEVICES");
data->metadata_lvs = prepare_sublvs (g_strsplit (value ?: "", ",", -1), data->metadata_lv);
}
}
if (free_table)
g_hash_table_destroy (table);
return data;
}
static void merge_lv_data (BDLVMLVdata *data, BDLVMLVdata *more_data) {
/* LVM2 guarantees:
- more_data->data_lvs is NULL
- more_data->metadata_lvs is NULL
- more_data->segs has zero or one entry
- more_data->seg_type is the same as data->seg_type (after mapping "error" to "linear")
*/
if (more_data->segs && more_data->segs[0]) {
int i;
for (i = 0; data->segs && data->segs[i]; i++)
;
BDLVMSEGdata **new_segs = g_new0 (BDLVMSEGdata *, i+2);
for (i = 0; data->segs && data->segs[i]; i++)
new_segs[i] = data->segs[i];
new_segs[i] = more_data->segs[0];
g_free (data->segs);
data->segs = new_segs;
more_data->segs[0] = NULL;
}
}
static BDLVMVDOPooldata* get_vdo_data_from_table (GHashTable *table, gboolean free_table) {
BDLVMVDOPooldata *data = g_new0 (BDLVMVDOPooldata, 1);
gchar *value = NULL;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VDO_OPERATING_MODE");
if (g_strcmp0 (value, "recovering") == 0)
data->operating_mode = BD_LVM_VDO_MODE_RECOVERING;
else if (g_strcmp0 (value, "read-only") == 0)
data->operating_mode = BD_LVM_VDO_MODE_READ_ONLY;
else if (g_strcmp0 (value, "normal") == 0)
data->operating_mode = BD_LVM_VDO_MODE_NORMAL;
else {
bd_utils_log_format (BD_UTILS_LOG_DEBUG, "Unknown VDO operating mode: %s", value);
data->operating_mode = BD_LVM_VDO_MODE_UNKNOWN;
}
value = (gchar*) g_hash_table_lookup (table, "LVM2_VDO_COMPRESSION_STATE");
if (g_strcmp0 (value, "online") == 0)
data->compression_state = BD_LVM_VDO_COMPRESSION_ONLINE;
else if (g_strcmp0 (value, "offline") == 0)
data->compression_state = BD_LVM_VDO_COMPRESSION_OFFLINE;
else {
bd_utils_log_format (BD_UTILS_LOG_DEBUG, "Unknown VDO compression state: %s", value);
data->compression_state = BD_LVM_VDO_COMPRESSION_UNKNOWN;
}
value = (gchar*) g_hash_table_lookup (table, "LVM2_VDO_INDEX_STATE");
if (g_strcmp0 (value, "error") == 0)
data->index_state = BD_LVM_VDO_INDEX_ERROR;
else if (g_strcmp0 (value, "closed") == 0)
data->index_state = BD_LVM_VDO_INDEX_CLOSED;
else if (g_strcmp0 (value, "opening") == 0)
data->index_state = BD_LVM_VDO_INDEX_OPENING;
else if (g_strcmp0 (value, "closing") == 0)
data->index_state = BD_LVM_VDO_INDEX_CLOSING;
else if (g_strcmp0 (value, "offline") == 0)
data->index_state = BD_LVM_VDO_INDEX_OFFLINE;
else if (g_strcmp0 (value, "online") == 0)
data->index_state = BD_LVM_VDO_INDEX_ONLINE;
else {
bd_utils_log_format (BD_UTILS_LOG_DEBUG, "Unknown VDO index state: %s", value);
data->index_state = BD_LVM_VDO_INDEX_UNKNOWN;
}
value = (gchar*) g_hash_table_lookup (table, "LVM2_VDO_WRITE_POLICY");
if (g_strcmp0 (value, "auto") == 0)
data->write_policy = BD_LVM_VDO_WRITE_POLICY_AUTO;
else if (g_strcmp0 (value, "sync") == 0)
data->write_policy = BD_LVM_VDO_WRITE_POLICY_SYNC;
else if (g_strcmp0 (value, "async") == 0)
data->write_policy = BD_LVM_VDO_WRITE_POLICY_ASYNC;
else {
bd_utils_log_format (BD_UTILS_LOG_DEBUG, "Unknown VDO write policy: %s", value);
data->write_policy = BD_LVM_VDO_WRITE_POLICY_UNKNOWN;
}
value = (gchar*) g_hash_table_lookup (table, "LVM2_VDO_INDEX_MEMORY_SIZE");
if (value)
data->index_memory_size = g_ascii_strtoull (value, NULL, 0);
else
data->index_memory_size = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VDO_USED_SIZE");
if (value)
data->used_size = g_ascii_strtoull (value, NULL, 0);
else
data->used_size = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VDO_SAVING_PERCENT");
if (value)
data->saving_percent = g_ascii_strtoull (value, NULL, 0);
else
data->saving_percent = 0;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VDO_COMPRESSION");
if (value && g_strcmp0 (value, "enabled") == 0)
data->compression = TRUE;
else
data->compression = FALSE;
value = (gchar*) g_hash_table_lookup (table, "LVM2_VDO_DEDUPLICATION");
if (value && g_strcmp0 (value, "enabled") == 0)
data->deduplication = TRUE;
else
data->deduplication = FALSE;
if (free_table)
g_hash_table_destroy (table);
return data;
}
/**
* bd_lvm_is_supported_pe_size:
* @size: size (in bytes) to test
* @error: (out) (optional): place to store error (if any)
*
* Returns: whether the given size is supported physical extent size or not
*
* Tech category: %BD_LVM_TECH_CALCS no mode (it is ignored)
*/
gboolean bd_lvm_is_supported_pe_size (guint64 size, GError **error G_GNUC_UNUSED) {
return (((size % 2) == 0) && (size >= (MIN_PE_SIZE)) && (size <= (MAX_PE_SIZE)));
}
/**
* bd_lvm_get_supported_pe_sizes:
* @error: (out) (optional): place to store error (if any)
*
* Returns: (transfer full) (array fixed-size=25): list of supported PE sizes
*
* Tech category: %BD_LVM_TECH_CALCS no mode (it is ignored)
*/
guint64 *bd_lvm_get_supported_pe_sizes (GError **error G_GNUC_UNUSED) {
guint8 i;
guint64 val = MIN_PE_SIZE;
guint8 num_items = ((guint8) round (log2 ((double) MAX_PE_SIZE))) - ((guint8) round (log2 ((double) MIN_PE_SIZE))) + 2;
guint64 *ret = g_new0 (guint64, num_items);
for (i=0; (val <= MAX_PE_SIZE); i++, val = val * 2)
ret[i] = val;
ret[num_items-1] = 0;
return ret;
}
/**
* bd_lvm_get_max_lv_size:
* @error: (out) (optional): place to store error (if any)
*
* Returns: maximum LV size in bytes
*
* Tech category: %BD_LVM_TECH_CALCS no mode (it is ignored)
*/
guint64 bd_lvm_get_max_lv_size (GError **error G_GNUC_UNUSED) {
return MAX_LV_SIZE;
}
/**
* bd_lvm_round_size_to_pe:
* @size: size to be rounded
* @pe_size: physical extent (PE) size or 0 to use the default
* @roundup: whether to round up or down (ceil or floor)
* @error: (out) (optional): place to store error (if any)
*
* Returns: @size rounded to @pe_size according to the @roundup
*
* Rounds given @size up/down to a multiple of @pe_size according to the value
* of the @roundup parameter. If the rounded value is too big to fit in the
* return type, the result is rounded down (floored) regardless of the @roundup
* parameter.
*
* Tech category: %BD_LVM_TECH_CALCS no mode (it is ignored)
*/
guint64 bd_lvm_round_size_to_pe (guint64 size, guint64 pe_size, gboolean roundup, GError **error G_GNUC_UNUSED) {
pe_size = RESOLVE_PE_SIZE (pe_size);
guint64 delta = size % pe_size;
if (delta == 0)
return size;
if (roundup && (((G_MAXUINT64 - (pe_size - delta)) >= size)))
return size + (pe_size - delta);
else
return size - delta;
}
/**
* bd_lvm_get_lv_physical_size:
* @lv_size: LV size
* @pe_size: PE size
* @error: (out) (optional): place to store error (if any)
*
* Returns: space taken on disk(s) by the LV with given @size
*
* Gives number of bytes needed for an LV with the size @lv_size on an LVM stack
* using given @pe_size.
*
* Tech category: %BD_LVM_TECH_CALCS no mode (it is ignored)
*/
guint64 bd_lvm_get_lv_physical_size (guint64 lv_size, guint64 pe_size, GError **error) {
pe_size = RESOLVE_PE_SIZE (pe_size);
/* the LV just takes space rounded up to the multiple of extent size */