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lv_manip: add get_lv_type_name/lv_is_linear and lv_is_striped helper fns

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The get_lv_type_name helps with translating volume type
to human readable form (can be used in reports or
various messages if needed).

The lv_is_linear and lv_is_striped complete the set of
lv_is_* functions that identify exact volume types.
This commit is contained in:
Peter Rajnoha 2014-07-01 10:37:01 +02:00
parent a4734354ce
commit 6b58647848
2 changed files with 155 additions and 0 deletions
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147
lib/metadata/lv_manip.c
View File

@ -82,6 +82,153 @@ struct pv_and_int {
struct physical_volume *pv;
int *i;
};
typedef enum {
LV_TYPE_UNKNOWN,
LV_TYPE_PVMOVE,
LV_TYPE_ORIGIN,
LV_TYPE_EXTERNAL_ORIGIN,
LV_TYPE_SNAPSHOT,
LV_TYPE_THIN,
LV_TYPE_THIN_SNAPSHOT,
LV_TYPE_THIN_POOL,
LV_TYPE_THIN_POOL_DATA,
LV_TYPE_THIN_POOL_METADATA,
LV_TYPE_THIN_POOL_METADATA_SPARE,
LV_TYPE_CACHE,
LV_TYPE_CACHE_POOL,
LV_TYPE_CACHE_POOL_DATA,
LV_TYPE_CACHE_POOL_METADATA,
LV_TYPE_CACHE_POOL_METADATA_SPARE,
LV_TYPE_VIRTUAL,
LV_TYPE_RAID,
LV_TYPE_RAID_IMAGE,
LV_TYPE_RAID_METADATA,
LV_TYPE_MIRROR,
LV_TYPE_MIRROR_IMAGE,
LV_TYPE_MIRROR_LOG,
LV_TYPE_LINEAR,
LV_TYPE_STRIPED
} lv_type_t;
static const char *_lv_type_names[] = {
[LV_TYPE_UNKNOWN] = "unknown",
[LV_TYPE_PVMOVE] = "pvmove",
[LV_TYPE_ORIGIN] = "origin",
[LV_TYPE_EXTERNAL_ORIGIN] = "external-origin",
[LV_TYPE_SNAPSHOT] = "snapshot",
[LV_TYPE_THIN] = "thin",
[LV_TYPE_THIN_SNAPSHOT] = "thin-snapshot",
[LV_TYPE_THIN_POOL] = "thin-pool",
[LV_TYPE_THIN_POOL_DATA] = "thin-pool-data",
[LV_TYPE_THIN_POOL_METADATA] = "thin-pool-metadata",
[LV_TYPE_THIN_POOL_METADATA_SPARE] = "thin-pool-metadata-spare",
[LV_TYPE_CACHE] = "cache",
[LV_TYPE_CACHE_POOL] = "cache-pool",
[LV_TYPE_CACHE_POOL_DATA] = "cache-pool-data",
[LV_TYPE_CACHE_POOL_METADATA] = "cache-pool-metadata",
[LV_TYPE_CACHE_POOL_METADATA_SPARE] = "cache-pool-metadata-spare",
[LV_TYPE_VIRTUAL] = "virtual",
[LV_TYPE_RAID] = "raid",
[LV_TYPE_RAID_IMAGE] = "raid-image",
[LV_TYPE_RAID_METADATA] = "raid-metadata",
[LV_TYPE_MIRROR] = "mirror",
[LV_TYPE_MIRROR_IMAGE] = "mirror-image",
[LV_TYPE_MIRROR_LOG] = "mirror-log",
[LV_TYPE_LINEAR] = "linear",
[LV_TYPE_STRIPED] = "striped"
};
static lv_type_t _get_lv_type(const struct logical_volume *lv)
{
lv_type_t type = LV_TYPE_UNKNOWN;
struct lv_segment *seg;
if (lv->status & PVMOVE)
type = LV_TYPE_PVMOVE;
else if (lv_is_origin(lv))
type = LV_TYPE_ORIGIN;
else if (lv_is_external_origin(lv))
type = LV_TYPE_EXTERNAL_ORIGIN;
else if (lv_is_cow(lv))
type = LV_TYPE_SNAPSHOT;
else if (lv_is_thin_volume(lv))
type = first_seg(lv)->origin ? LV_TYPE_THIN_SNAPSHOT : LV_TYPE_THIN;
else if (lv_is_thin_pool(lv))
type = LV_TYPE_THIN_POOL;
else if (lv_is_thin_pool_data(lv))
type = LV_TYPE_THIN_POOL_DATA;
else if (lv_is_thin_pool_metadata(lv))
type = LV_TYPE_THIN_POOL_METADATA;
else if (lv_is_pool_metadata_spare(lv))
type = LV_TYPE_THIN_POOL_METADATA_SPARE;
else if (lv_is_cache(lv))
type = LV_TYPE_CACHE;
else if (lv_is_cache_pool(lv))
type = LV_TYPE_CACHE_POOL;
else if (lv_is_cache_pool_data(lv))
type = LV_TYPE_CACHE_POOL_DATA;
else if (lv_is_cache_pool_metadata(lv))
type = LV_TYPE_CACHE_POOL_METADATA;
else if (lv_is_pool_metadata_spare(lv))
type = LV_TYPE_CACHE_POOL_METADATA_SPARE;
else if (lv_is_virtual(lv))
type = LV_TYPE_VIRTUAL;
else if (lv_is_raid(lv))
type = LV_TYPE_RAID;
else if (lv_is_raid_image(lv))
type = LV_TYPE_RAID_IMAGE;
else if (lv_is_raid_metadata(lv))
type = LV_TYPE_RAID_METADATA;
else if (lv_is_mirrored(lv))
type = LV_TYPE_MIRROR;
else if (lv_is_mirror_image(lv))
type = LV_TYPE_MIRROR_IMAGE;
else if (lv_is_mirror_log(lv))
type = LV_TYPE_MIRROR_LOG;
/* none of the above, check linear... */
if (type == LV_TYPE_UNKNOWN) {
type = LV_TYPE_LINEAR;
dm_list_iterate_items(seg, &lv->segments) {
if (!seg_is_linear(seg)) {
type = LV_TYPE_UNKNOWN;
break;
}
}
}
/* ...if not even linear, check striped... */
if (type == LV_TYPE_UNKNOWN) {
type = LV_TYPE_STRIPED;
dm_list_iterate_items(seg, &lv->segments) {
if (!seg_is_striped(seg)) {
type = LV_TYPE_UNKNOWN;
break;
}
}
}
return type;
}
const char *lv_type_name(const struct logical_volume *lv) {
lv_type_t type = _get_lv_type(lv);
return _lv_type_names[type];
}
int lv_is_linear(const struct logical_volume *lv)
{
lv_type_t type = _get_lv_type(lv);
return type == LV_TYPE_LINEAR;
}
int lv_is_striped(const struct logical_volume *lv)
{
lv_type_t type = _get_lv_type(lv);
return type == LV_TYPE_STRIPED;
}
static int _lv_is_on_pv(struct logical_volume *lv, void *data)
{
int *is_on_pv = ((struct pv_and_int *)data)->i;

8
lib/metadata/metadata-exported.h
View File

@ -899,6 +899,14 @@ int get_pv_list_for_lv(struct dm_pool *mem,
struct lv_segment *first_seg(const struct logical_volume *lv);
struct lv_segment *last_seg(const struct logical_volume *lv);
/* Human-readable LV type name. */
const char *lv_type_name(const struct logical_volume *lv);
/*
* Useful function to determine linear and striped volumes.
*/
int lv_is_linear(const struct logical_volume *lv);
int lv_is_striped(const struct logical_volume *lv);
/*
* Useful functions for managing snapshots.