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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "BitmapAllocator.h"
#define dout_context cct
#define dout_subsys ceph_subsys_bluestore
#undef dout_prefix
#define dout_prefix *_dout << "fbmap_alloc " << this << " "
BitmapAllocator::BitmapAllocator(CephContext* _cct,
int64_t capacity,
int64_t alloc_unit,
const std::string& name) :
Allocator(name, capacity, alloc_unit),
cct(_cct)
{
ldout(cct, 10) << __func__ << " 0x" << std::hex << capacity << "/"
<< alloc_unit << std::dec << dendl;
_init(capacity, alloc_unit, false);
}
int64_t BitmapAllocator::allocate(
uint64_t want_size, uint64_t alloc_unit, uint64_t max_alloc_size,
int64_t hint, PExtentVector *extents)
{
uint64_t allocated = 0;
size_t old_size = extents->size();
ldout(cct, 10) << __func__ << std::hex << " 0x" << want_size
<< "/" << alloc_unit << "," << max_alloc_size << "," << hint
<< std::dec << dendl;
_allocate_l2(want_size, alloc_unit, max_alloc_size, hint,
&allocated, extents);
if (!allocated) {
return -ENOSPC;
}
for (auto i = old_size; i < extents->size(); ++i) {
auto& e = (*extents)[i];
ldout(cct, 10) << __func__
<< " extent: 0x" << std::hex << e.offset << "~" << e.length
<< "/" << alloc_unit << "," << max_alloc_size << "," << hint
<< std::dec << dendl;
}
return int64_t(allocated);
}
void BitmapAllocator::release(
const interval_set<uint64_t>& release_set)
{
for (auto r : release_set) {
ldout(cct, 10) << __func__ << " 0x" << std::hex << r.first << "~" << r.second
<< std::dec << dendl;
}
_free_l2(release_set);
ldout(cct, 10) << __func__ << " done" << dendl;
}
void BitmapAllocator::init_add_free(uint64_t offset, uint64_t length)
{
ldout(cct, 10) << __func__ << " 0x" << std::hex << offset << "~" << length
<< std::dec << dendl;
auto mas = get_min_alloc_size();
uint64_t offs = round_up_to(offset, mas);
uint64_t l = p2align(offset + length - offs, mas);
_mark_free(offs, l);
ldout(cct, 10) << __func__ << " done" << dendl;
}
void BitmapAllocator::init_rm_free(uint64_t offset, uint64_t length)
{
ldout(cct, 10) << __func__ << " 0x" << std::hex << offset << "~" << length
<< std::dec << dendl;
auto mas = get_min_alloc_size();
uint64_t offs = round_up_to(offset, mas);
uint64_t l = p2align(offset + length - offs, mas);
_mark_allocated(offs, l);
ldout(cct, 10) << __func__ << " done" << dendl;
}
void BitmapAllocator::shutdown()
{
ldout(cct, 1) << __func__ << dendl;
_shutdown();
}
void BitmapAllocator::dump()
{
// bin -> interval count
std::map<size_t, size_t> bins_overall;
collect_stats(bins_overall);
auto it = bins_overall.begin();
while (it != bins_overall.end()) {
ldout(cct, 0) << __func__
<< " bin " << it->first
<< "(< " << byte_u_t((1 << (it->first + 1)) * get_min_alloc_size()) << ")"
<< " : " << it->second << " extents"
<< dendl;
++it;
}
}
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