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Fix cling policy not to behave like normal policy if no previous LV seg.

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Fix alloc cling to cling to PVs already found with contiguous policy.
This commit is contained in:
Alasdair Kergon 2012-05-11 22:53:13 +00:00
parent 3a042496fd
commit bfdfc9e68e
2 changed files with 36 additions and 27 deletions
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4
WHATS_NEW
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@ -1,6 +1,8 @@
Version 2.02.96 -
================================
Fix policy loop not to use later policies when --alloc cling without tags.
Fix alloc cling to cling to PVs already found with contiguous policy.
Fix cling policy not to behave like normal policy if no previous LV seg.
Fix allocation loop not to use later policies when --alloc cling without tags.
Append _TO_LVSEG to names of internal A_CONTIGUOUS and A_CLING flags.
Add missing pkg init --with-systemdsystemunitdir in configure.in (2.02.92).
Fix division by zero if PV with zero PE count is used during vgcfgrestore.

59
lib/metadata/lv_manip.c
View File

@ -910,13 +910,18 @@ static void _init_alloc_parms(struct alloc_handle *ah, struct alloc_parms *alloc
if (alloc_parms->prev_lvseg) {
if (alloc_parms->alloc == ALLOC_CONTIGUOUS)
alloc_parms->flags |= A_CONTIGUOUS_TO_LVSEG;
else if (alloc_parms->alloc == ALLOC_CLING)
else if ((alloc_parms->alloc == ALLOC_CLING) || (alloc_parms->alloc == ALLOC_CLING_BY_TAGS))
alloc_parms->flags |= A_CLING_TO_LVSEG;
else if (alloc_parms->alloc == ALLOC_CLING_BY_TAGS) {
alloc_parms->flags |= A_CLING_TO_LVSEG;
alloc_parms->flags |= A_CLING_BY_TAGS;
}
}
} else
/*
* A cling allocation that follows a successful contiguous allocation
* must use the same PVs (or else fail).
*/
if ((alloc_parms->alloc == ALLOC_CLING) || (alloc_parms->alloc == ALLOC_CLING_BY_TAGS))
alloc_parms->flags |= A_CLING_TO_ALLOCED;
if (alloc_parms->alloc == ALLOC_CLING_BY_TAGS)
alloc_parms->flags |= A_CLING_BY_TAGS;
/*
* For normal allocations, if any extents have already been found
@ -1435,7 +1440,8 @@ static int _check_contiguous(struct cmd_context *cmd,
/*
* Is pva on same PV as any areas already used in this allocation attempt?
*/
static int _check_cling_to_alloced(struct alloc_handle *ah, struct pv_area *pva, struct alloc_state *alloc_state)
static int _check_cling_to_alloced(struct alloc_handle *ah, const struct dm_config_node *cling_tag_list_cn,
struct pv_area *pva, struct alloc_state *alloc_state)
{
unsigned s;
struct alloced_area *aa;
@ -1451,7 +1457,8 @@ static int _check_cling_to_alloced(struct alloc_handle *ah, struct pv_area *pva,
if (alloc_state->areas[s].pva)
continue; /* Area already assigned */
dm_list_iterate_items(aa, &ah->alloced_areas[s]) {
if (pva->map->pv == aa[0].pv) {
if ((!cling_tag_list_cn && (pva->map->pv == aa[0].pv)) ||
(cling_tag_list_cn && _pvs_have_matching_tag(cling_tag_list_cn, pva->map->pv, aa[0].pv))) {
_reserve_area(&alloc_state->areas[s], pva, pva->count, s + 1, 0);
return 1;
}
@ -1505,29 +1512,28 @@ static area_use_t _check_pva(struct alloc_handle *ah, struct pv_area *pva, uint3
/* Try next area on same PV if looking for contiguous space */
if (alloc_parms->flags & A_CONTIGUOUS_TO_LVSEG)
return NEXT_AREA;
/* Cling_to_alloced? */
if ((alloc_parms->flags & A_CLING_TO_ALLOCED) &&
_check_cling_to_alloced(ah, pva, alloc_state))
return PREFERRED;
/* Cling? */
if (!(alloc_parms->flags & A_CLING_BY_TAGS) &&
alloc_parms->prev_lvseg && _check_cling(ah, NULL, alloc_parms->prev_lvseg, pva, alloc_state))
/* Cling to prev_lvseg? */
if (((alloc_parms->flags & A_CLING_TO_LVSEG) || (ah->maximise_cling && alloc_parms->prev_lvseg)) &&
_check_cling(ah, NULL, alloc_parms->prev_lvseg, pva, alloc_state))
/* If this PV is suitable, use this first area */
return PREFERRED;
if (!ah->maximise_cling && !(alloc_parms->flags & A_CLING_BY_TAGS))
return NEXT_PV;
/* Cling_to_alloced? */
if ((alloc_parms->flags & A_CLING_TO_ALLOCED) &&
_check_cling_to_alloced(ah, NULL, pva, alloc_state))
return PREFERRED;
/* Cling_by_tags? */
if ((alloc_parms->flags & (A_CLING_BY_TAGS | A_CLING_TO_ALLOCED)) && ah->cling_tag_list_cn &&
alloc_parms->prev_lvseg && _check_cling(ah, ah->cling_tag_list_cn, alloc_parms->prev_lvseg, pva, alloc_state))
return PREFERRED;
if (alloc_parms->flags & A_CLING_BY_TAGS)
if (!(alloc_parms->flags & A_CLING_BY_TAGS) || !ah->cling_tag_list_cn)
return NEXT_PV;
if (alloc_parms->prev_lvseg) {
if (_check_cling(ah, ah->cling_tag_list_cn, alloc_parms->prev_lvseg, pva, alloc_state))
return PREFERRED;
} else if (_check_cling_to_alloced(ah, ah->cling_tag_list_cn, pva, alloc_state))
return PREFERRED;
/* All areas on this PV give same result so pointless checking more */
return NEXT_PV;
}
@ -1669,6 +1675,7 @@ static int _find_some_parallel_space(struct alloc_handle *ah, const struct alloc
uint32_t devices_needed = ah->area_count + ah->parity_count;
/* ix_offset holds the number of parallel allocations that must be contiguous/cling */
/* At most one of A_CONTIGUOUS_TO_LVSEG, A_CLING_TO_LVSEG or A_CLING_TO_ALLOCED may be set */
if (alloc_parms->flags & (A_CONTIGUOUS_TO_LVSEG | A_CLING_TO_LVSEG))
ix_offset = _stripes_per_mimage(alloc_parms->prev_lvseg) * alloc_parms->prev_lvseg->area_count;
@ -1791,7 +1798,7 @@ static int _find_some_parallel_space(struct alloc_handle *ah, const struct alloc
break;
}
} while ((alloc_parms->alloc == ALLOC_ANYWHERE && last_ix != ix && ix < devices_needed + alloc_state->log_area_count_still_needed) ||
/* With cling_to_alloced, if there were gaps in the preferred areas, have a second iteration */
/* With cling_to_alloced and normal, if there were gaps in the preferred areas, have a second iteration */
(alloc_parms->alloc == ALLOC_NORMAL && preferred_count &&
(preferred_count < ix_offset || alloc_state->log_area_count_still_needed) &&
(alloc_parms->flags & A_CLING_TO_ALLOCED) && !iteration_count++) ||
@ -1920,7 +1927,7 @@ static int _find_max_parallel_space_for_one_policy(struct alloc_handle *ah, stru
return_0;
/*
* If we didn't allocate anything this time and had
* If we didn't allocate anything this time with ALLOC_NORMAL and had
* A_CLING_TO_ALLOCED set, try again without it.
*
* For ALLOC_NORMAL, if we did allocate something without the
@ -1928,7 +1935,7 @@ static int _find_max_parallel_space_for_one_policy(struct alloc_handle *ah, stru
* remain on the same disks where possible.
*/
if (old_allocated == alloc_state->allocated) {
if (alloc_parms->flags & A_CLING_TO_ALLOCED)
if ((alloc_parms->alloc == ALLOC_NORMAL) && (alloc_parms->flags & A_CLING_TO_ALLOCED))
alloc_parms->flags &= ~A_CLING_TO_ALLOCED;
else
break; /* Give up */