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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "gtest/gtest.h"
#include "rgw_compression.h"
class ut_get_sink : public RGWGetObj_Filter {
bufferlist sink;
public:
ut_get_sink() {}
virtual ~ut_get_sink() {}
int handle_data(bufferlist& bl, off_t bl_ofs, off_t bl_len) override
{
auto& bl_buffers = bl.buffers();
auto i = bl_buffers.begin();
while (bl_len > 0)
{
ceph_assert(i != bl_buffers.end());
off_t len = std::min<off_t>(bl_len, i->length());
sink.append(*i, 0, len);
bl_len -= len;
i++;
}
return 0;
}
bufferlist& get_sink()
{
return sink;
}
};
class ut_get_sink_size : public RGWGetObj_Filter {
size_t max_size = 0;
public:
ut_get_sink_size() {}
virtual ~ut_get_sink_size() {}
int handle_data(bufferlist& bl, off_t bl_ofs, off_t bl_len) override
{
if (bl_len > (off_t)max_size)
max_size = bl_len;
return 0;
}
size_t get_size()
{
return max_size;
}
};
class ut_put_sink: public rgw::sal::DataProcessor
{
bufferlist sink;
public:
int process(bufferlist&& bl, uint64_t ofs) override
{
sink.claim_append(bl);
return 0;
}
bufferlist& get_sink()
{
return sink;
}
};
struct MockGetDataCB : public RGWGetObj_Filter {
int handle_data(bufferlist& bl, off_t bl_ofs, off_t bl_len) override {
return 0;
}
} cb;
using range_t = std::pair<off_t, off_t>;
// call filter->fixup_range() and return the range as a pair. this makes it easy
// to fit on a single line for ASSERT_EQ()
range_t fixup_range(RGWGetObj_Decompress *filter, off_t ofs, off_t end)
{
filter->fixup_range(ofs, end);
return {ofs, end};
}
TEST(Decompress, FixupRangePartial)
{
RGWCompressionInfo cs_info;
// array of blocks with original len=8, compressed to len=6
auto& blocks = cs_info.blocks;
blocks.emplace_back(compression_block{0, 0, 6});
blocks.emplace_back(compression_block{8, 6, 6});
blocks.emplace_back(compression_block{16, 12, 6});
blocks.emplace_back(compression_block{24, 18, 6});
const bool partial = true;
RGWGetObj_Decompress decompress(g_ceph_context, &cs_info, partial, &cb);
// test translation from logical ranges to compressed ranges
ASSERT_EQ(range_t(0, 5), fixup_range(&decompress, 0, 1));
ASSERT_EQ(range_t(0, 5), fixup_range(&decompress, 1, 7));
ASSERT_EQ(range_t(0, 11), fixup_range(&decompress, 7, 8));
ASSERT_EQ(range_t(0, 11), fixup_range(&decompress, 0, 9));
ASSERT_EQ(range_t(0, 11), fixup_range(&decompress, 7, 9));
ASSERT_EQ(range_t(6, 11), fixup_range(&decompress, 8, 9));
ASSERT_EQ(range_t(6, 17), fixup_range(&decompress, 8, 16));
ASSERT_EQ(range_t(6, 17), fixup_range(&decompress, 8, 17));
ASSERT_EQ(range_t(12, 23), fixup_range(&decompress, 16, 24));
ASSERT_EQ(range_t(12, 23), fixup_range(&decompress, 16, 999));
ASSERT_EQ(range_t(18, 23), fixup_range(&decompress, 998, 999));
}
TEST(Compress, LimitedChunkSize)
{
CompressorRef plugin;
plugin = Compressor::create(g_ceph_context, Compressor::COMP_ALG_ZLIB);
ASSERT_NE(plugin.get(), nullptr);
for (size_t s = 100 ; s < 10000000 ; s = s*5/4)
{
bufferptr bp(s);
bufferlist bl;
bl.append(bp);
ut_put_sink c_sink;
RGWPutObj_Compress compressor(g_ceph_context, plugin, &c_sink);
compressor.process(std::move(bl), 0);
compressor.process({}, s); // flush
RGWCompressionInfo cs_info;
cs_info.compression_type = plugin->get_type_name();
cs_info.orig_size = s;
cs_info.compressor_message = compressor.get_compressor_message();
cs_info.blocks = move(compressor.get_compression_blocks());
ut_get_sink_size d_sink;
RGWGetObj_Decompress decompress(g_ceph_context, &cs_info, false, &d_sink);
off_t f_begin = 0;
off_t f_end = s - 1;
decompress.fixup_range(f_begin, f_end);
decompress.handle_data(c_sink.get_sink(), 0, c_sink.get_sink().length());
bufferlist empty;
decompress.handle_data(empty, 0, 0);
ASSERT_LE(d_sink.get_size(), (size_t)g_ceph_context->_conf->rgw_max_chunk_size);
}
}
TEST(Compress, BillionZeros)
{
CompressorRef plugin;
ut_put_sink c_sink;
plugin = Compressor::create(g_ceph_context, Compressor::COMP_ALG_ZLIB);
ASSERT_NE(plugin.get(), nullptr);
RGWPutObj_Compress compressor(g_ceph_context, plugin, &c_sink);
constexpr size_t size = 1000000;
bufferptr bp(size);
bufferlist bl;
bl.append(bp);
for (int i=0; i<1000;i++)
compressor.process(bufferlist{bl}, size*i);
compressor.process({}, size*1000); // flush
RGWCompressionInfo cs_info;
cs_info.compression_type = plugin->get_type_name();
cs_info.orig_size = size*1000;
cs_info.compressor_message = compressor.get_compressor_message();
cs_info.blocks = move(compressor.get_compression_blocks());
ut_get_sink d_sink;
RGWGetObj_Decompress decompress(g_ceph_context, &cs_info, false, &d_sink);
off_t f_begin = 0;
off_t f_end = size*1000 - 1;
decompress.fixup_range(f_begin, f_end);
decompress.handle_data(c_sink.get_sink(), 0, c_sink.get_sink().length());
bufferlist empty;
decompress.handle_data(empty, 0, 0);
ASSERT_EQ(d_sink.get_sink().length() , size*1000);
}
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