/*
* Update extents parameters based on other parameters which affect the size
* calculation.
* NOTE: We must do this here because of the percent_t typedef and because we
* need the vg.
*/
static int _update_extents_params(struct volume_group *vg,
struct lvcreate_params *lp,
struct lvcreate_cmdline_params *lcp)
{
uint32_t pv_extent_count;
struct logical_volume *origin = NULL;
int changed = 0;
uint32_t size_rest;
uint32_t stripesize_extents;
if (lcp->size &&
!(lp->extents = extents_from_size(vg->cmd, lcp->size,
vg->extent_size)))
return_0;
if (lp->voriginsize &&
!(lp->voriginextents = extents_from_size(vg->cmd, lp->voriginsize,
vg->extent_size)))
return_0;
/*
* Create the pv list before we parse lcp->percent - might be
* PERCENT_PVSs
*/
if (lcp->pv_count) {
if (!(lp->pvh = create_pv_list(vg->cmd->mem, vg,
lcp->pv_count, lcp->pvs, 1)))
return_0;
} else
lp->pvh = &vg->pvs;
switch(lcp->percent) {
case PERCENT_VG:
lp->extents = percent_of_extents(lp->extents, vg->extent_count, 0);
break;
case PERCENT_FREE:
lp->extents = percent_of_extents(lp->extents, vg->free_count, 0);
break;
case PERCENT_PVS:
if (!lcp->pv_count)
lp->extents = percent_of_extents(lp->extents, vg->extent_count, 0);
else {
pv_extent_count = pv_list_extents_free(lp->pvh);
lp->extents = percent_of_extents(lp->extents, pv_extent_count, 0);
}
break;
case PERCENT_LV:
log_error("Please express size as %%VG, %%PVS, or "
"%%FREE.");
return 0;
case PERCENT_ORIGIN:
if (lp->snapshot && lp->origin &&
!(origin = find_lv(vg, lp->origin))) {
log_error("Couldn't find origin volume '%s'.",
lp->origin);
return 0;
}
if (!origin) {
log_error(INTERNAL_ERROR "Couldn't find origin volume.");
return 0;
}
lp->extents = percent_of_extents(lp->extents, origin->le_count, 0);
break;
case PERCENT_NONE:
break;
}
if (!(stripesize_extents = lp->stripe_size / vg->extent_size))
stripesize_extents = 1;
if ((lcp->percent != PERCENT_NONE) && lp->stripes &&
(size_rest = lp->extents % (lp->stripes * stripesize_extents)) &&
(vg->free_count < lp->extents - size_rest + (lp->stripes * stripesize_extents))) {
log_print("Rounding size (%d extents) down to stripe boundary "
"size (%d extents)", lp->extents,
lp->extents - size_rest);
lp->extents = lp->extents - size_rest;
}
if (lp->create_thin_pool) {
if (!arg_count(vg->cmd, poolmetadatasize_ARG)) {
/* Defaults to nr_pool_blocks * 64b */
lp->poolmetadatasize = (uint64_t) lp->extents * vg->extent_size /
(uint64_t) (lp->chunk_size * (SECTOR_SIZE / UINT64_C(64)));
/* Check if we could eventually use bigger chunk size */
if (!arg_count(vg->cmd, chunksize_ARG)) {
while ((lp->poolmetadatasize >
(DEFAULT_THIN_POOL_OPTIMAL_SIZE / SECTOR_SIZE)) &&
(lp->chunk_size < DM_THIN_MAX_DATA_BLOCK_SIZE)) {
lp->chunk_size <<= 1;
lp->poolmetadatasize >>= 1;
changed++;
}
if (changed)
log_verbose("Changed chunksize to %u sectors.",
lp->chunk_size);
}
}
if (lp->poolmetadatasize > (2 * DEFAULT_THIN_POOL_MAX_METADATA_SIZE)) {
if (arg_count(vg->cmd, poolmetadatasize_ARG))
log_warn("WARNING: Maximum supported pool metadata size is 16GB.");
lp->poolmetadatasize = 2 * DEFAULT_THIN_POOL_MAX_METADATA_SIZE;
} else if (lp->poolmetadatasize < (2 * DEFAULT_THIN_POOL_MIN_METADATA_SIZE)) {
if (arg_count(vg->cmd, poolmetadatasize_ARG))
log_warn("WARNING: Minimum supported pool metadata size is 2M.");
lp->poolmetadatasize = 2 * DEFAULT_THIN_POOL_MIN_METADATA_SIZE;
}
log_verbose("Setting pool metadata size to %" PRIu64 " sectors.",
lp->poolmetadatasize);
if (!(lp->poolmetadataextents =
extents_from_size(vg->cmd, lp->poolmetadatasize, vg->extent_size)))
return_0;
}
/*
* Update extents parameters based on other parameters which affect the size
* calculation.
* NOTE: We must do this here because of the dm_percent_t typedef and because we
* need the vg.
*/
static int _update_extents_params(struct volume_group *vg,
struct lvcreate_params *lp,
struct lvcreate_cmdline_params *lcp)
{
uint32_t pv_extent_count;
struct logical_volume *origin = NULL;
uint32_t size_rest;
uint32_t stripesize_extents;
uint32_t extents;
if (lcp->size &&
!(lp->extents = extents_from_size(vg->cmd, lcp->size,
vg->extent_size)))
return_0;
if (lp->voriginsize &&
!(lp->voriginextents = extents_from_size(vg->cmd, lp->voriginsize,
vg->extent_size)))
return_0;
/*
* Create the pv list before we parse lcp->percent - might be
* PERCENT_PVSs
*/
if (lcp->pv_count) {
if (!(lp->pvh = create_pv_list(vg->cmd->mem, vg,
lcp->pv_count, lcp->pvs, 1)))
return_0;
} else
lp->pvh = &vg->pvs;
switch (lcp->percent) {
case PERCENT_VG:
extents = percent_of_extents(lp->extents, vg->extent_count, 0);
break;
case PERCENT_FREE:
extents = percent_of_extents(lp->extents, vg->free_count, 0);
break;
case PERCENT_PVS:
if (lcp->pv_count) {
pv_extent_count = pv_list_extents_free(lp->pvh);
extents = percent_of_extents(lp->extents, pv_extent_count, 0);
} else
extents = percent_of_extents(lp->extents, vg->extent_count, 0);
break;
case PERCENT_LV:
log_error("Please express size as %s%%VG, %%PVS, "
"or %%FREE.", (lp->snapshot) ? "%ORIGIN, " : "");
return 0;
case PERCENT_ORIGIN:
if (lp->snapshot && lp->origin &&
!(origin = find_lv(vg, lp->origin))) {
log_error("Couldn't find origin volume '%s'.",
lp->origin);
return 0;
}
if (!origin) {
log_error(INTERNAL_ERROR "Couldn't find origin volume.");
return 0;
}
/* Add whole metadata size estimation */
extents = cow_max_extents(origin, lp->chunk_size) - origin->le_count +
percent_of_extents(lp->extents, origin->le_count, 1);
break;
case PERCENT_NONE:
extents = lp->extents;
break;
default:
log_error(INTERNAL_ERROR "Unsupported percent type %u.", lcp->percent);
return 0;
}
if (lcp->percent) {
/* FIXME Don't do the adjustment for parallel allocation with PERCENT_ORIGIN! */
lp->approx_alloc = 1;
log_verbose("Converted %" PRIu32 "%%%s into %" PRIu32 " extents.", lp->extents, get_percent_string(lcp->percent), extents);
lp->extents = extents;
}
if (lp->snapshot && lp->origin && lp->extents) {
if (!lp->chunk_size) {
log_error(INTERNAL_ERROR "Missing snapshot chunk size.");
return 0;
}
if (!origin && !(origin = find_lv(vg, lp->origin))) {
log_error("Couldn't find origin volume '%s'.",
lp->origin);
return 0;
}
extents = cow_max_extents(origin, lp->chunk_size);
if (extents < lp->extents) {
log_print_unless_silent("Reducing COW size %s down to maximum usable size %s.",
display_size(vg->cmd, (uint64_t) vg->extent_size * lp->extents),
display_size(vg->cmd, (uint64_t) vg->extent_size * extents));
lp->extents = extents;
}
}
if (!(stripesize_extents = lp->stripe_size / vg->extent_size))
stripesize_extents = 1;
if ((lcp->percent != PERCENT_NONE) && lp->stripes &&
(size_rest = lp->extents % (lp->stripes * stripesize_extents)) &&
(vg->free_count < lp->extents - size_rest + (lp->stripes * stripesize_extents))) {
log_print_unless_silent("Rounding size (%d extents) down to stripe boundary "
"size (%d extents)", lp->extents,
lp->extents - size_rest);
lp->extents = lp->extents - size_rest;
}
if (lp->create_pool) {
if (!_lvcreate_update_pool_params(vg, lp))
return_0;
if (!(lp->poolmetadataextents =
extents_from_size(vg->cmd, lp->poolmetadatasize, vg->extent_size)))
return_0;
if (lcp->percent == PERCENT_FREE) {
if (lp->extents <= (2 * lp->poolmetadataextents)) {
log_error("Not enough space for thin pool creation.");
return 0;
}
/* FIXME: persistent hidden space in VG wanted */
lp->extents -= (2 * lp->poolmetadataextents);
}
}
return 1;
}
