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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
#include "include/interval_set.h"
#include "include/buffer.h"
#include <list>
#include <map>
#include <set>
#include <iostream>
#include "Object.h"
void ContDesc::encode(bufferlist &bl) const
{
ENCODE_START(1, 1, bl);
encode(objnum, bl);
encode(cursnap, bl);
encode(seqnum, bl);
encode(prefix, bl);
encode(oid, bl);
ENCODE_FINISH(bl);
}
void ContDesc::decode(bufferlist::const_iterator &bl)
{
DECODE_START(1, bl);
decode(objnum, bl);
decode(cursnap, bl);
decode(seqnum, bl);
decode(prefix, bl);
decode(oid, bl);
DECODE_FINISH(bl);
}
std::ostream &operator<<(std::ostream &out, const ContDesc &rhs)
{
return out << "(ObjNum " << rhs.objnum
<< " snap " << rhs.cursnap
<< " seq_num " << rhs.seqnum
<< ")";
}
void AppendGenerator::get_ranges_map(
const ContDesc &cont, std::map<uint64_t, uint64_t> &out) {
RandWrap rand(cont.seqnum);
uint64_t pos = off;
uint64_t limit = off + get_append_size(cont);
while (pos < limit) {
uint64_t segment_length = round_up(
rand() % (max_append_size - min_append_size),
alignment) + min_append_size;
ceph_assert(segment_length >= min_append_size);
if (segment_length + pos > limit) {
segment_length = limit - pos;
}
if (alignment)
ceph_assert(segment_length % alignment == 0);
out.insert(std::pair<uint64_t, uint64_t>(pos, segment_length));
pos += segment_length;
}
}
void VarLenGenerator::get_ranges_map(
const ContDesc &cont, std::map<uint64_t, uint64_t> &out) {
RandWrap rand(cont.seqnum);
uint64_t pos = 0;
uint64_t limit = get_length(cont);
bool include = false;
while (pos < limit) {
uint64_t segment_length = (rand() % (max_stride_size - min_stride_size)) + min_stride_size;
ceph_assert(segment_length < max_stride_size);
ceph_assert(segment_length >= min_stride_size);
if (segment_length + pos > limit) {
segment_length = limit - pos;
}
if (include) {
out.insert(std::pair<uint64_t, uint64_t>(pos, segment_length));
include = false;
} else {
include = true;
}
pos += segment_length;
}
}
void ObjectDesc::iterator::adjust_stack() {
while (!stack.empty() && pos >= stack.top().second.next) {
ceph_assert(pos == stack.top().second.next);
size = stack.top().second.size;
current = stack.top().first;
stack.pop();
}
if (stack.empty()) {
cur_valid_till = std::numeric_limits<uint64_t>::max();
} else {
cur_valid_till = stack.top().second.next;
}
while (current != layers.end() && !current->covers(pos)) {
uint64_t next = current->next(pos);
if (next < cur_valid_till) {
stack.emplace(current, StackState{next, size});
cur_valid_till = next;
}
++current;
}
if (current == layers.end()) {
size = 0;
} else {
current->iter.seek(pos);
size = std::min(size, current->get_size());
cur_valid_till = std::min(
current->valid_till(pos),
cur_valid_till);
}
}
const ContDesc &ObjectDesc::most_recent() {
return layers.begin()->second;
}
void ObjectDesc::update(ContentsGenerator *gen, const ContDesc &next) {
layers.push_front(std::pair<std::shared_ptr<ContentsGenerator>, ContDesc>(std::shared_ptr<ContentsGenerator>(gen), next));
return;
}
bool ObjectDesc::check(bufferlist &to_check) {
iterator objiter = begin();
uint64_t error_at = 0;
if (!objiter.check_bl_advance(to_check, &error_at)) {
std::cout << "incorrect buffer at pos " << error_at << std::endl;
return false;
}
uint64_t size = layers.begin()->first->get_length(layers.begin()->second);
if (to_check.length() < size) {
std::cout << "only read " << to_check.length()
<< " out of size " << size << std::endl;
return false;
}
return true;
}
bool ObjectDesc::check_sparse(const std::map<uint64_t, uint64_t>& extents,
bufferlist &to_check)
{
uint64_t off = 0;
uint64_t pos = 0;
auto objiter = begin();
for (auto &&extiter : extents) {
// verify hole
{
bufferlist bl;
bl.append_zero(extiter.first - pos);
uint64_t error_at = 0;
if (!objiter.check_bl_advance(bl, &error_at)) {
std::cout << "sparse read omitted non-zero data at "
<< error_at << std::endl;
return false;
}
}
ceph_assert(off <= to_check.length());
pos = extiter.first;
objiter.seek(pos);
{
bufferlist bl;
bl.substr_of(
to_check,
off,
std::min(to_check.length() - off, extiter.second));
uint64_t error_at = 0;
if (!objiter.check_bl_advance(bl, &error_at)) {
std::cout << "incorrect buffer at pos " << error_at << std::endl;
return false;
}
off += extiter.second;
pos += extiter.second;
}
if (pos < extiter.first + extiter.second) {
std::cout << "reached end of iterator first" << std::endl;
return false;
}
}
// final hole
bufferlist bl;
uint64_t size = layers.begin()->first->get_length(layers.begin()->second);
bl.append_zero(size - pos);
uint64_t error_at;
if (!objiter.check_bl_advance(bl, &error_at)) {
std::cout << "sparse read omitted non-zero data at "
<< error_at << std::endl;
return false;
}
return true;
}
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