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writecache: working real dm uuid suffix for wcorig lv

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This commit is contained in:
David Teigland 2020-02-19 13:30:02 -06:00
parent 4829f27b76
commit 8153c5f1e6
6 changed files with 17 additions and 10 deletions
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4
lib/activate/dev_manager.c
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@ -3316,6 +3316,10 @@ static int _add_new_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
if (!layer && lv_is_new_thin_pool(lv))
layer = lv_layer(lv);
/* Adds -real to the dm uuid of wcorig LV. */
if (!layer && lv_is_writecache_origin(lv))
layer = lv_layer(lv); /* "real" */
if (!(dlid = build_dm_uuid(dm->mem, lv, layer)))
return_0;

2
lib/metadata/lv.c
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@ -830,7 +830,7 @@ const char *lv_layer(const struct logical_volume *lv)
if (lv_is_vdo_pool(lv))
return "vpool";
if (lv_is_origin(lv) || lv_is_external_origin(lv))
if (lv_is_origin(lv) || lv_is_external_origin(lv) || lv_is_writecache_origin(lv))
return "real";
return NULL;

16
lib/metadata/writecache_manip.c
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@ -24,15 +24,15 @@
int lv_is_writecache_origin(const struct logical_volume *lv)
{
struct seg_list *sl;
struct lv_segment *seg;
dm_list_iterate_items(sl, &lv->segs_using_this_lv) {
if (!sl->seg || !sl->seg->lv || !sl->seg->origin)
continue;
if (lv_is_writecache(sl->seg->lv) && (sl->seg->origin == lv))
return 1;
}
return 0;
/* Make sure there's exactly one segment in segs_using_this_lv! */
if (dm_list_empty(&lv->segs_using_this_lv) ||
(dm_list_size(&lv->segs_using_this_lv) > 1))
return 0;
seg = get_only_segment_using_this_lv(lv);
return seg && lv_is_writecache(seg->lv) && !lv_is_pending_delete(seg->lv) && (seg_lv(seg, 0) == lv);
}
int lv_is_writecache_cachevol(const struct logical_volume *lv)

1
lib/misc/lvm-string.c
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@ -251,6 +251,7 @@ char *build_dm_uuid(struct dm_pool *mem, const struct logical_volume *lv,
*/
/* Suffixes used here MUST match lib/activate/dev_manager.c */
layer = lv_is_cache_origin(lv) ? "real" :
lv_is_writecache_origin(lv) ? "real" :
(lv_is_cache(lv) && lv_is_pending_delete(lv)) ? "real" :
lv_is_cache_pool_data(lv) ? "cdata" :
lv_is_cache_pool_metadata(lv) ? "cmeta" :

2
lib/writecache/writecache.c
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@ -260,7 +260,7 @@ static int _writecache_add_target_line(struct dev_manager *dm,
if ((pmem = lv_on_pmem(seg->writecache)) < 0)
return_0;
if (!(origin_uuid = build_dm_uuid(mem, seg_lv(seg, 0), NULL)))
if (!(origin_uuid = build_dm_uuid(mem, seg_lv(seg, 0), "real")))
return_0;
if (!(fast_uuid = build_dm_uuid(mem, seg->writecache, "cvol")))

2
tools/lvconvert.c
View File

@ -5537,6 +5537,8 @@ static struct logical_volume *_lv_writecache_create(struct cmd_context *cmd,
if (!(segtype = get_segtype_from_string(cmd, SEG_TYPE_NAME_WRITECACHE)))
return_NULL;
lv->status |= WRITECACHE;
/*
* "lv_wcorig" is a new LV with new id, but with the segments from "lv".
* "lv" keeps the existing name and id, but gets a new writecache segment,