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o Factor _allocate out for use by lv_extend

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This commit is contained in:
Joe Thornber 2001-11-06 11:31:29 +00:00
parent 15e35a737c
commit 2cffd7d4e1
1 changed files with 46 additions and 33 deletions
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79
lib/metadata/lv_manip.c
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@ -127,6 +127,50 @@ static int _alloc_simple(struct logical_volume *lv,
return 1;
}
/*
* Chooses a correct allocation policy.
*/
static int _allocate(struct volume_group *vg, struct logical_volume *lv,
struct list *acceptable_pvs,
uint32_t allocated, uint32_t extents)
{
int r = 0;
struct pool *scratch;
struct list *pvms;
if (!(scratch = pool_create(1024))) {
stack;
return 0;
}
/*
* Build the sets of available areas on
* the pv's.
*/
if (!(pvms = create_pv_maps(scratch, vg, acceptable_pvs))) {
log_err("couldn't create extent mappings");
goto out;
}
if (lv->stripes > 1)
r = _alloc_striped(lv, pvms, allocated);
else if (lv->status & ALLOC_CONTIGUOUS)
r = _alloc_contiguous(lv, pvms, allocated);
else
r = _alloc_simple(lv, pvms, allocated);
if (r) {
vg->lv_count++;
vg->free_count -= extents;
}
out:
pool_destroy(scratch);
return r;
}
struct logical_volume *lv_create(struct io_space *ios,
const char *name,
uint32_t status,
@ -138,14 +182,6 @@ struct logical_volume *lv_create(struct io_space *ios,
{
struct lv_list *ll = NULL;
struct logical_volume *lv;
struct list *pvms;
struct pool *scratch;
int r;
if (!(scratch = pool_create(1024))) {
stack;
return NULL;
}
if (!extents) {
log_err("Attempt to create an lv with zero extents");
@ -189,41 +225,18 @@ struct logical_volume *lv_create(struct io_space *ios,
goto bad;
}
/*
* Build the sets of available areas on
* the pv's.
*/
if (!(pvms = create_pv_maps(scratch, vg, acceptable_pvs))) {
log_err("couldn't create extent mappings");
goto bad;
}
if (stripes > 1)
r = _alloc_striped(lv, pvms, 0u);
else if (status & ALLOC_CONTIGUOUS)
r = _alloc_contiguous(lv, pvms, 0u);
else
r = _alloc_simple(lv, pvms, 0u);
if (!r) {
log_err("Extent allocation failed.");
if (!_allocate(vg, lv, acceptable_pvs, 0u, extents)) {
stack;
goto bad;
}
list_add(&ll->list, &vg->lvs);
vg->lv_count++;
vg->free_count -= extents;
pool_destroy(scratch);
return lv;
bad:
if (ll)
pool_free(ios->mem, ll);
pool_destroy(scratch);
return NULL;
}