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cache/pool: Make the fns in pool_manip.c work with cache pools

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The functions in pool_manip.c are specific to thin pools.  It's
now time to make them more generic and able to handle cache pools
as well.
This commit is contained in:
Jonathan Brassow 2014-01-28 12:25:07 -06:00
parent 70fd2139e1
commit e833d84e67
1 changed files with 29 additions and 15 deletions
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44
lib/metadata/pool_manip.c
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@ -28,14 +28,15 @@
int attach_pool_metadata_lv(struct lv_segment *pool_seg,
struct logical_volume *metadata_lv)
{
if (!seg_is_thin_pool(pool_seg)) {
if (!seg_is_thin_pool(pool_seg) && !seg_is_cache_pool(pool_seg)) {
log_error(INTERNAL_ERROR
"Unable to attach pool metadata LV to %s segtype.",
pool_seg->segtype->ops->name(pool_seg));
return 0;
}
pool_seg->metadata_lv = metadata_lv;
metadata_lv->status |= THIN_POOL_METADATA;
metadata_lv->status |= seg_is_thin_pool(pool_seg) ?
THIN_POOL_METADATA : CACHE_POOL_METADATA;
lv_set_hidden(metadata_lv);
return add_seg_to_segs_using_this_lv(metadata_lv, pool_seg);
@ -44,7 +45,7 @@ int attach_pool_metadata_lv(struct lv_segment *pool_seg,
int attach_pool_data_lv(struct lv_segment *pool_seg,
struct logical_volume *pool_data_lv)
{
if (!seg_is_thin_pool(pool_seg)) {
if (!seg_is_thin_pool(pool_seg) && !seg_is_cache_pool(pool_seg)) {
log_error(INTERNAL_ERROR
"Unable to attach pool data LV to %s segtype.",
pool_seg->segtype->ops->name(pool_seg));
@ -52,10 +53,12 @@ int attach_pool_data_lv(struct lv_segment *pool_seg,
}
if (!set_lv_segment_area_lv(pool_seg, 0, pool_data_lv,
0, THIN_POOL_DATA))
0, seg_is_thin_pool(pool_seg) ?
THIN_POOL_DATA : CACHE_POOL_DATA))
return_0;
pool_seg->lv->status |= THIN_POOL;
pool_seg->lv->status |= seg_is_thin_pool(pool_seg) ?
THIN_POOL : CACHE_POOL;
lv_set_hidden(pool_data_lv);
return 1;
@ -66,16 +69,16 @@ int attach_pool_lv(struct lv_segment *seg,
struct logical_volume *origin,
struct logical_volume *merge_lv)
{
if (!seg_is_thin_volume(seg)) {
if (!seg_is_thin_volume(seg) && !seg_is_cache(seg)) {
log_error(INTERNAL_ERROR "Unable to attach pool to %s/%s"
" that is thin volume.",
" that is not cache or thin volume.",
pool_lv->vg->name, seg->lv->name);
return 0;
}
seg->pool_lv = pool_lv;
seg->origin = origin;
seg->lv->status |= THIN_VOLUME;
seg->lv->status |= seg_is_cache(seg) ? CACHE : THIN_VOLUME;
if (origin && !add_seg_to_segs_using_this_lv(origin, seg))
return_0;
@ -108,6 +111,13 @@ int detach_pool_lv(struct lv_segment *seg)
return 0;
}
if (seg_is_cache(seg)) {
if (!remove_seg_from_segs_using_this_lv(seg->pool_lv, seg))
return_0;
seg->pool_lv = NULL;
return 1;
}
if (!lv_is_thin_pool(seg->pool_lv)) {
log_error(INTERNAL_ERROR
"Cannot detach pool from LV %s.",
@ -189,9 +199,11 @@ struct lv_segment *find_pool_seg(const struct lv_segment *seg)
return NULL;
}
if (!seg_is_thin_pool(pool_seg)) {
log_error("%s on %s is not a pool segment.",
pool_seg->lv->name, seg->lv->name);
if ((lv_is_thin_type(seg->lv) && !seg_is_thin_pool(pool_seg)) &&
!seg_is_cache_pool(pool_seg)) {
log_error("%s on %s is not a %s pool segment",
pool_seg->lv->name, seg->lv->name,
lv_is_thin_type(seg->lv) ? "thin" : "cache");
return NULL;
}
@ -208,7 +220,7 @@ int create_pool(struct logical_volume *pool_lv,
char name[NAME_LEN];
if (pool_lv->le_count) {
log_error(INTERNAL_ERROR "Pool %s has already extents.",
log_error(INTERNAL_ERROR "Pool %s already has extents.",
pool_lv->name);
return 0;
}
@ -259,7 +271,8 @@ int create_pool(struct logical_volume *pool_lv,
}
if (dm_snprintf(name, sizeof(name), "%s_%s", pool_lv->name,
"tmeta") < 0) {
(segtype_is_cache_pool(segtype)) ?
"cmeta" : "tmeta") < 0) {
log_error("Name is too long to be a pool name.");
goto bad;
}
@ -277,7 +290,8 @@ int create_pool(struct logical_volume *pool_lv,
if (!(data_lv = insert_layer_for_lv(pool_lv->vg->cmd, pool_lv,
pool_lv->status,
"_tdata")))
(segtype_is_cache_pool(segtype)) ?
"_cdata" : "_tdata")))
goto_bad;
seg = first_seg(pool_lv);
@ -285,7 +299,7 @@ int create_pool(struct logical_volume *pool_lv,
if (!remove_seg_from_segs_using_this_lv(data_lv, seg))
goto_bad;
seg->segtype = segtype; /* Set as thin_pool segment */
seg->segtype = segtype; /* Set as thin_pool or cache_pool segment */
if (!attach_pool_data_lv(seg, data_lv))
goto_bad;