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raid_manip: prevent reshape with freed component SubLVs

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In order to free SubLVs after a stripe removing reshape, lvconvert has
to be run without layout changes.   Prevent a layout changing request
in case any such freed SubLVs exist and inform the user about the fact
requesting to release them first.
This commit is contained in:
Heinz Mauelshagen 2024-06-14 12:58:12 +02:00
parent cc6ddf978a
commit d01e5ec126
1 changed files with 32 additions and 7 deletions
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39
lib/metadata/raid_manip.c
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@ -2272,6 +2272,21 @@ static int _pre_raid0_remove_rmeta(struct logical_volume *lv, void *data)
return _activate_sub_lvs_excl_local_list(lv, lv_list) ? 2 : 0;
}
static int _same_layout(struct lv_segment *seg,
const struct segment_type *new_segtype,
const unsigned new_data_copies,
const unsigned new_region_size,
const unsigned old_image_count,
const unsigned new_image_count,
const unsigned new_stripe_size)
{
return (seg->segtype == new_segtype &&
seg->data_copies == new_data_copies &&
seg->region_size == new_region_size &&
old_image_count == new_image_count &&
seg->stripe_size == new_stripe_size) ? 1 : 0;
}
/*
* Reshape logical volume @lv by adding/removing stripes
* (absolute new stripes given in @new_stripes), changing
@ -2292,7 +2307,7 @@ static int _raid_reshape(struct logical_volume *lv,
{
int force_repair = 0, r, too_few = 0;
unsigned devs_health, devs_in_sync;
uint32_t new_image_count, old_image_count;
uint32_t available_slvs, removed_slvs, new_image_count, old_image_count;
enum alloc_where where_it_was = alloc_none;
struct lv_segment *seg = first_seg(lv);
struct dm_list removal_lvs;
@ -2310,7 +2325,7 @@ static int _raid_reshape(struct logical_volume *lv,
return_0;
/* FIXME Can't reshape volume in use - aka not toplevel devices */
if (old_image_count < new_image_count &&
if (old_image_count != new_image_count &&
!dm_list_empty(&seg->lv->segs_using_this_lv)) {
log_error("Unable to convert stacked volume %s.", display_lvname(seg->lv));
return 0;
@ -2328,16 +2343,26 @@ static int _raid_reshape(struct logical_volume *lv,
return 0;
}
/* Prevent any new reshape request on RaidLV with existing freed stripes resulting from a previous one. */
if (!_get_available_removed_sublvs(lv, &available_slvs, &removed_slvs))
return_0;
if (removed_slvs &&
!_same_layout(seg, new_segtype, new_data_copies, new_region_size,
old_image_count, new_image_count + removed_slvs, new_stripe_size)) {
log_error("Unable to convert %s containing sub LVs to remove after a reshape.",
display_lvname(lv));
log_error("Run \"lvconvert --stripes %" PRIu32 " %s\" first.",
seg->area_count - removed_slvs - 1, display_lvname(lv));
return 0;
}
lv->status &= ~LV_RESHAPE; /* Reset any reshaping segtype flag */
dm_list_init(&removal_lvs);
/* No change in layout requested ? */
if (seg->segtype == new_segtype &&
seg->data_copies == new_data_copies &&
seg->region_size == new_region_size &&
old_image_count == new_image_count &&
seg->stripe_size == new_stripe_size) {
if (_same_layout(seg, new_segtype, new_data_copies, new_region_size, old_image_count, new_image_count, new_stripe_size)) {
/*
* No change in segment type, image count, region or stripe size has been requested ->
* user requests this to remove any reshape space from the @lv