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osd: make build_removed_snaps, is_removed_snap consistent

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This commit is contained in:
Sage Weil 2010-05-19 10:42:20 -07:00
parent ee218a1e81
commit ff94c3a4f5
1 changed files with 18 additions and 4 deletions
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22
src/osd/osd_types.h
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@ -618,17 +618,31 @@ struct pg_pool_t {
lpgp_num_mask = (1 << calc_bits_of(v.lpgp_num-1)) - 1;
}
/*
* we have two snap modes:
* - pool global snaps
* - snap existence/non-existence defined by snaps[] and snap_seq
* - user managed snaps
* - removal governed by removed_snaps
*
* we know which mode we're using based on whether removed_snaps is empty.
*/
bool is_pool_snaps_mode() const {
return removed_snaps.empty();
}
bool is_removed_snap(snapid_t s) const {
if (snaps.size())
return snaps.count(s) == 0;
return s <= get_snap_seq() && removed_snaps.contains(s);
if (is_pool_snaps_mode())
return s <= get_snap_seq() && snaps.count(s) == 0;
else
return removed_snaps.contains(s);
}
/*
* build set of known-removed sets from either pool snaps or
* explicit removed_snaps set.
*/
void build_removed_snaps(interval_set<snapid_t>& rs) const {
if (removed_snaps.empty()) {
if (is_pool_snaps_mode()) {
rs.clear();
for (snapid_t s = 1; s <= get_snap_seq(); s = s + 1)
if (snaps.count(s) == 0)