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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "test/librbd/test_fixture.h"
#include "test/librbd/test_support.h"
#include "librbd/cache/pwl/LogMap.cc"
void register_test_write_log_map() {
}
namespace librbd {
namespace cache {
namespace pwl {
struct TestLogEntry {
uint64_t image_offset_bytes;
uint64_t write_bytes;
uint32_t referring_map_entries = 0;
TestLogEntry(const uint64_t image_offset_bytes, const uint64_t write_bytes)
: image_offset_bytes(image_offset_bytes), write_bytes(write_bytes) {
}
uint64_t get_offset_bytes() {
return image_offset_bytes;
}
uint64_t get_write_bytes() {
return write_bytes;
}
BlockExtent block_extent() {
return BlockExtent(image_offset_bytes, image_offset_bytes + write_bytes);
}
uint32_t get_map_ref() {
return referring_map_entries;
}
void inc_map_ref() {
referring_map_entries++;
}
void dec_map_ref() {
referring_map_entries--;
}
friend std::ostream &operator<<(std::ostream &os,
const TestLogEntry &entry) {
os << "referring_map_entries=" << entry.referring_map_entries << ", "
<< "image_offset_bytes=" << entry.image_offset_bytes << ", "
<< "write_bytes=" << entry.write_bytes;
return os;
};
};
typedef std::list<std::shared_ptr<TestLogEntry>> TestLogEntries;
typedef LogMapEntry<TestLogEntry> TestMapEntry;
typedef LogMapEntries<TestLogEntry> TestLogMapEntries;
typedef LogMap<TestLogEntry> TestLogMap;
class TestWriteLogMap : public TestFixture {
public:
void SetUp() override {
TestFixture::SetUp();
m_cct = reinterpret_cast<CephContext*>(m_ioctx.cct());
}
CephContext *m_cct;
};
TEST_F(TestWriteLogMap, Simple) {
TestLogEntries es;
TestLogMapEntries lme;
TestLogMap map(m_cct);
/* LogEntry takes offset, length, in bytes */
auto e1 = make_shared<TestLogEntry>(4, 8);
TestLogEntry *e1_ptr = e1.get();
ASSERT_EQ(4, e1_ptr->get_offset_bytes());
ASSERT_EQ(8, e1_ptr->get_write_bytes());
map.add_log_entry(e1);
/* BlockExtent takes first, last, in blocks */
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(0, 100));
int numfound = found0.size();
/* Written range includes the single write above */
ASSERT_EQ(1, numfound);
ASSERT_EQ(e1, found0.front().log_entry);
/* Nothing before that */
found0 = map.find_map_entries(BlockExtent(0, 3));
numfound = found0.size();
ASSERT_EQ(0, numfound);
/* Nothing after that */
found0 = map.find_map_entries(BlockExtent(12, 99));
numfound = found0.size();
ASSERT_EQ(0, numfound);
/* 4-11 will be e1 */
for (int i=4; i<12; i++) {
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(i, i + 1));
int numfound = found0.size();
ASSERT_EQ(1, numfound);
ASSERT_EQ(e1, found0.front().log_entry);
}
map.remove_log_entry(e1);
/* Nothing should be found */
for (int i=4; i<12; i++) {
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(i, i + 1));
int numfound = found0.size();
ASSERT_EQ(0, numfound);
}
}
TEST_F(TestWriteLogMap, OverlapFront) {
TestLogMap map(m_cct);
auto e0 = make_shared<TestLogEntry>(4, 8);
map.add_log_entry(e0);
/* replaces block 4-7 of e0 */
auto e1 = make_shared<TestLogEntry>(0, 8);
map.add_log_entry(e1);
/* Written range includes the two writes above */
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(0, 100));
int numfound = found0.size();
ASSERT_EQ(2, numfound);
ASSERT_EQ(e1, found0.front().log_entry);
ASSERT_EQ(0, found0.front().block_extent.block_start);
ASSERT_EQ(8, found0.front().block_extent.block_end);
found0.pop_front();
ASSERT_EQ(e0, found0.front().log_entry);
ASSERT_EQ(8, found0.front().block_extent.block_start);
ASSERT_EQ(12, found0.front().block_extent.block_end);
/* 0-7 will be e1 */
for (int i=0; i<8; i++) {
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(i, i + 1));
int numfound = found0.size();
ASSERT_EQ(1, numfound);
ASSERT_EQ(e1, found0.front().log_entry);
}
/* 8-11 will be e0 */
for (int i=8; i<12; i++) {
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(i, i + 1));
int numfound = found0.size();
ASSERT_EQ(1, numfound);
ASSERT_EQ(e0, found0.front().log_entry);
}
}
TEST_F(TestWriteLogMap, OverlapBack) {
TestLogMap map(m_cct);
auto e0 = make_shared<TestLogEntry>(0, 8);
map.add_log_entry(e0);
/* replaces block 4-7 of e0 */
auto e1 = make_shared<TestLogEntry>(4, 8);
map.add_log_entry(e1);
/* Written range includes the two writes above */
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(0, 100));
int numfound = found0.size();
ASSERT_EQ(2, numfound);
ASSERT_EQ(e0, found0.front().log_entry);
ASSERT_EQ(0, found0.front().block_extent.block_start);
ASSERT_EQ(4, found0.front().block_extent.block_end);
found0.pop_front();
ASSERT_EQ(e1, found0.front().log_entry);
ASSERT_EQ(4, found0.front().block_extent.block_start);
ASSERT_EQ(12, found0.front().block_extent.block_end);
/* 0-3 will be e0 */
for (int i=0; i<4; i++) {
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(i, i + 1));
int numfound = found0.size();
ASSERT_EQ(1, numfound);
ASSERT_EQ(e0, found0.front().log_entry);
}
/* 4-11 will be e1 */
for (int i=4; i<12; i++) {
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(i, i + 1));
int numfound = found0.size();
ASSERT_EQ(1, numfound);
ASSERT_EQ(e1, found0.front().log_entry);
}
map.remove_log_entry(e0);
/* 0-3 will find nothing */
for (int i=0; i<4; i++) {
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(i, i + 1));
int numfound = found0.size();
ASSERT_EQ(0, numfound);
}
/* 4-11 will still be e1 */
for (int i=4; i<12; i++) {
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(i, i + 1));
int numfound = found0.size();
ASSERT_EQ(1, numfound);
ASSERT_EQ(e1, found0.front().log_entry);
}
}
TEST_F(TestWriteLogMap, OverlapMiddle) {
TestLogMap map(m_cct);
auto e0 = make_shared<TestLogEntry>(0, 1);
map.add_log_entry(e0);
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(0, 1));
int numfound = found0.size();
ASSERT_EQ(1, numfound);
ASSERT_EQ(e0, found0.front().log_entry);
TestLogEntries entries = map.find_log_entries(BlockExtent(0, 1));
int entriesfound = entries.size();
ASSERT_EQ(1, entriesfound);
ASSERT_EQ(e0, entries.front());
auto e1 = make_shared<TestLogEntry>(1, 1);
map.add_log_entry(e1);
found0 = map.find_map_entries(BlockExtent(1, 2));
numfound = found0.size();
ASSERT_EQ(1, numfound);
ASSERT_EQ(e1, found0.front().log_entry);
entries = map.find_log_entries(BlockExtent(1, 2));
entriesfound = entries.size();
ASSERT_EQ(1, entriesfound);
ASSERT_EQ(e1, entries.front());
auto e2 = make_shared<TestLogEntry>(2, 1);
map.add_log_entry(e2);
found0 = map.find_map_entries(BlockExtent(2, 3));
numfound = found0.size();
ASSERT_EQ(1, numfound);
ASSERT_EQ(e2, found0.front().log_entry);
entries = map.find_log_entries(BlockExtent(2, 3));
entriesfound = entries.size();
ASSERT_EQ(1, entriesfound);
ASSERT_EQ(e2, entries.front());
/* replaces e1 */
auto e3 = make_shared<TestLogEntry>(1, 1);
map.add_log_entry(e3);
found0 = map.find_map_entries(BlockExtent(1, 2));
numfound = found0.size();
ASSERT_EQ(1, numfound);
ASSERT_EQ(e3, found0.front().log_entry);
entries = map.find_log_entries(BlockExtent(1, 2));
entriesfound = entries.size();
ASSERT_EQ(1, entriesfound);
ASSERT_EQ(e3, entries.front());
found0 = map.find_map_entries(BlockExtent(0, 100));
numfound = found0.size();
ASSERT_EQ(3, numfound);
ASSERT_EQ(e0, found0.front().log_entry);
found0.pop_front();
ASSERT_EQ(e3, found0.front().log_entry);
found0.pop_front();
ASSERT_EQ(e2, found0.front().log_entry);
entries = map.find_log_entries(BlockExtent(0, 100));
entriesfound = entries.size();
ASSERT_EQ(3, entriesfound);
ASSERT_EQ(e0, entries.front());
entries.pop_front();
ASSERT_EQ(e3, entries.front());
entries.pop_front();
ASSERT_EQ(e2, entries.front());
entries.clear();
entries.emplace_back(e0);
entries.emplace_back(e1);
map.remove_log_entries(entries);
found0 = map.find_map_entries(BlockExtent(0, 100));
numfound = found0.size();
ASSERT_EQ(2, numfound);
ASSERT_EQ(e3, found0.front().log_entry);
found0.pop_front();
ASSERT_EQ(e2, found0.front().log_entry);
}
TEST_F(TestWriteLogMap, OverlapSplit) {
TestLogMap map(m_cct);
auto e0 = make_shared<TestLogEntry>(0, 8);
map.add_log_entry(e0);
/* Splits e0 at 1 */
auto e1 = make_shared<TestLogEntry>(1, 1);
map.add_log_entry(e1);
/* Splits e0 again at 4 */
auto e2 = make_shared<TestLogEntry>(4, 2);
map.add_log_entry(e2);
/* Replaces one block of e2, and one of e0 */
auto e3 = make_shared<TestLogEntry>(5, 2);
map.add_log_entry(e3);
/* Expecting: 0:e0, 1:e1, 2..3:e0, 4:e2, 5..6:e3, 7:e0 */
TestLogMapEntries found0 = map.find_map_entries(BlockExtent(0, 100));
int numfound = found0.size();
ASSERT_EQ(6, numfound);
ASSERT_EQ(e0, found0.front().log_entry);
ASSERT_EQ(0, found0.front().block_extent.block_start);
ASSERT_EQ(1, found0.front().block_extent.block_end);
found0.pop_front();
ASSERT_EQ(e1, found0.front().log_entry);
ASSERT_EQ(1, found0.front().block_extent.block_start);
ASSERT_EQ(2, found0.front().block_extent.block_end);
found0.pop_front();
ASSERT_EQ(e0, found0.front().log_entry);
ASSERT_EQ(2, found0.front().block_extent.block_start);
ASSERT_EQ(4, found0.front().block_extent.block_end);
found0.pop_front();
ASSERT_EQ(e2, found0.front().log_entry);
ASSERT_EQ(4, found0.front().block_extent.block_start);
ASSERT_EQ(5, found0.front().block_extent.block_end);
found0.pop_front();
ASSERT_EQ(e3, found0.front().log_entry);
ASSERT_EQ(5, found0.front().block_extent.block_start);
ASSERT_EQ(7, found0.front().block_extent.block_end);
found0.pop_front();
ASSERT_EQ(e0, found0.front().log_entry);
ASSERT_EQ(7, found0.front().block_extent.block_start);
ASSERT_EQ(8, found0.front().block_extent.block_end);
}
} // namespace pwl
} // namespace cache
} // namespace librbd
|
