--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph distributed storage system
+ *
+ * Copyright (C) 2013,2014 Cloudwatt <libre.licensing@cloudwatt.com>
+ * Copyright (C) 2014 Red Hat <contact@redhat.com>
+ *
+ * Author: Loic Dachary <loic@dachary.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+
+#include "crush/CrushWrapper.h"
+#include "include/stringify.h"
+#include "erasure-code/jerasure/ErasureCodeJerasure.h"
+#include "global/global_context.h"
+#include "common/config.h"
+#include "gtest/gtest.h"
+
+
+template <typename T>
+class ErasureCodeTest : public ::testing::Test {
+ public:
+};
+
+typedef ::testing::Types<
+ ErasureCodeJerasureReedSolomonVandermonde,
+ ErasureCodeJerasureReedSolomonRAID6,
+ ErasureCodeJerasureCauchyOrig,
+ ErasureCodeJerasureCauchyGood,
+ ErasureCodeJerasureLiberation,
+ ErasureCodeJerasureBlaumRoth,
+ ErasureCodeJerasureLiber8tion
+> JerasureTypes;
+TYPED_TEST_CASE(ErasureCodeTest, JerasureTypes);
+
+TYPED_TEST(ErasureCodeTest, sanity_check_k)
+{
+ TypeParam jerasure;
+ ErasureCodeProfile profile;
+ profile["k"] = "1";
+ profile["m"] = "1";
+ profile["packetsize"] = "8";
+ ostringstream errors;
+ EXPECT_EQ(-EINVAL, jerasure.init(profile, &errors));
+ EXPECT_NE(std::string::npos, errors.str().find("must be >= 2"));
+}
+
+TYPED_TEST(ErasureCodeTest, encode_decode)
+{
+ const char *per_chunk_alignments[] = { "false", "true" };
+ for (int per_chunk_alignment = 0 ;
+ per_chunk_alignment < 2;
+ per_chunk_alignment++) {
+ TypeParam jerasure;
+ ErasureCodeProfile profile;
+ profile["k"] = "2";
+ profile["m"] = "2";
+ profile["packetsize"] = "8";
+ profile["jerasure-per-chunk-alignment"] =
+ per_chunk_alignments[per_chunk_alignment];
+ jerasure.init(profile, &cerr);
+
+#define LARGE_ENOUGH 2048
+ bufferptr in_ptr(buffer::create_page_aligned(LARGE_ENOUGH));
+ in_ptr.zero();
+ in_ptr.set_length(0);
+ const char *payload =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+ in_ptr.append(payload, strlen(payload));
+ bufferlist in;
+ in.push_front(in_ptr);
+ int want_to_encode[] = { 0, 1, 2, 3 };
+ map<int, bufferlist> encoded;
+ EXPECT_EQ(0, jerasure.encode(set<int>(want_to_encode, want_to_encode+4),
+ in,
+ &encoded));
+ EXPECT_EQ(4u, encoded.size());
+ unsigned length = encoded[0].length();
+ EXPECT_EQ(0, memcmp(encoded[0].c_str(), in.c_str(), length));
+ EXPECT_EQ(0, memcmp(encoded[1].c_str(), in.c_str() + length,
+ in.length() - length));
+
+
+ // all chunks are available
+ {
+ int want_to_decode[] = { 0, 1 };
+ map<int, bufferlist> decoded;
+ EXPECT_EQ(0, jerasure.decode(set<int>(want_to_decode, want_to_decode+2),
+ encoded,
+ &decoded));
+ EXPECT_EQ(2u, decoded.size());
+ EXPECT_EQ(length, decoded[0].length());
+ EXPECT_EQ(0, memcmp(decoded[0].c_str(), in.c_str(), length));
+ EXPECT_EQ(0, memcmp(decoded[1].c_str(), in.c_str() + length,
+ in.length() - length));
+ }
+
+ // two chunks are missing
+ {
+ map<int, bufferlist> degraded = encoded;
+ degraded.erase(0);
+ degraded.erase(1);
+ EXPECT_EQ(2u, degraded.size());
+ int want_to_decode[] = { 0, 1 };
+ map<int, bufferlist> decoded;
+ EXPECT_EQ(0, jerasure.decode(set<int>(want_to_decode, want_to_decode+2),
+ degraded,
+ &decoded));
+ // always decode all, regardless of want_to_decode
+ EXPECT_EQ(4u, decoded.size());
+ EXPECT_EQ(length, decoded[0].length());
+ EXPECT_EQ(0, memcmp(decoded[0].c_str(), in.c_str(), length));
+ EXPECT_EQ(0, memcmp(decoded[1].c_str(), in.c_str() + length,
+ in.length() - length));
+ }
+ }
+}
+
+TYPED_TEST(ErasureCodeTest, minimum_to_decode)
+{
+ TypeParam jerasure;
+ ErasureCodeProfile profile;
+ profile["k"] = "2";
+ profile["m"] = "2";
+ profile["w"] = "7";
+ profile["packetsize"] = "8";
+ jerasure.init(profile, &cerr);
+
+ //
+ // If trying to read nothing, the minimum is empty.
+ //
+ {
+ set<int> want_to_read;
+ set<int> available_chunks;
+ set<int> minimum;
+
+ EXPECT_EQ(0, jerasure.minimum_to_decode(want_to_read,
+ available_chunks,
+ &minimum));
+ EXPECT_TRUE(minimum.empty());
+ }
+ //
+ // There is no way to read a chunk if none are available.
+ //
+ {
+ set<int> want_to_read;
+ set<int> available_chunks;
+ set<int> minimum;
+
+ want_to_read.insert(0);
+
+ EXPECT_EQ(-EIO, jerasure.minimum_to_decode(want_to_read,
+ available_chunks,
+ &minimum));
+ }
+ //
+ // Reading a subset of the available chunks is always possible.
+ //
+ {
+ set<int> want_to_read;
+ set<int> available_chunks;
+ set<int> minimum;
+
+ want_to_read.insert(0);
+ available_chunks.insert(0);
+
+ EXPECT_EQ(0, jerasure.minimum_to_decode(want_to_read,
+ available_chunks,
+ &minimum));
+ EXPECT_EQ(want_to_read, minimum);
+ }
+ //
+ // There is no way to read a missing chunk if there is less than k
+ // chunks available.
+ //
+ {
+ set<int> want_to_read;
+ set<int> available_chunks;
+ set<int> minimum;
+
+ want_to_read.insert(0);
+ want_to_read.insert(1);
+ available_chunks.insert(0);
+
+ EXPECT_EQ(-EIO, jerasure.minimum_to_decode(want_to_read,
+ available_chunks,
+ &minimum));
+ }
+ //
+ // When chunks are not available, the minimum can be made of any
+ // chunks. For instance, to read 1 and 3 below the minimum could be
+ // 2 and 3 which may seem better because it contains one of the
+ // chunks to be read. But it won't be more efficient than retrieving
+ // 0 and 2 instead because, in both cases, the decode function will
+ // need to run the same recovery operation and use the same amount
+ // of CPU and memory.
+ //
+ {
+ set<int> want_to_read;
+ set<int> available_chunks;
+ set<int> minimum;
+
+ want_to_read.insert(1);
+ want_to_read.insert(3);
+ available_chunks.insert(0);
+ available_chunks.insert(2);
+ available_chunks.insert(3);
+
+ EXPECT_EQ(0, jerasure.minimum_to_decode(want_to_read,
+ available_chunks,
+ &minimum));
+ EXPECT_EQ(2u, minimum.size());
+ EXPECT_EQ(0u, minimum.count(3));
+ }
+}
+
+TEST(ErasureCodeTest, encode)
+{
+ ErasureCodeJerasureReedSolomonVandermonde jerasure;
+ ErasureCodeProfile profile;
+ profile["k"] = "2";
+ profile["m"] = "2";
+ profile["w"] = "8";
+ jerasure.init(profile, &cerr);
+
+ unsigned aligned_object_size = jerasure.get_alignment() * 2;
+ {
+ //
+ // When the input bufferlist needs to be padded because
+ // it is not properly aligned, it is padded with zeros.
+ //
+ bufferlist in;
+ map<int,bufferlist> encoded;
+ int want_to_encode[] = { 0, 1, 2, 3 };
+ int trail_length = 1;
+ in.append(string(aligned_object_size + trail_length, 'X'));
+ EXPECT_EQ(0, jerasure.encode(set<int>(want_to_encode, want_to_encode+4),
+ in,
+ &encoded));
+ EXPECT_EQ(4u, encoded.size());
+ char *last_chunk = encoded[1].c_str();
+ int length =encoded[1].length();
+ EXPECT_EQ('X', last_chunk[0]);
+ EXPECT_EQ('\0', last_chunk[length - trail_length]);
+ }
+
+ {
+ //
+ // When only the first chunk is required, the encoded map only
+ // contains the first chunk. Although the jerasure encode
+ // internally allocated a buffer because of padding requirements
+ // and also computes the coding chunks, they are released before
+ // the return of the method, as shown when running the tests thru
+ // valgrind (there is no leak).
+ //
+ bufferlist in;
+ map<int,bufferlist> encoded;
+ set<int> want_to_encode;
+ want_to_encode.insert(0);
+ int trail_length = 1;
+ in.append(string(aligned_object_size + trail_length, 'X'));
+ EXPECT_EQ(0, jerasure.encode(want_to_encode, in, &encoded));
+ EXPECT_EQ(1u, encoded.size());
+ }
+}
+
+TEST(ErasureCodeTest, create_rule)
+{
+ CrushWrapper *c = new CrushWrapper;
+ c->create();
+ int root_type = 2;
+ c->set_type_name(root_type, "root");
+ int host_type = 1;
+ c->set_type_name(host_type, "host");
+ int osd_type = 0;
+ c->set_type_name(osd_type, "osd");
+
+ int rootno;
+ c->add_bucket(0, CRUSH_BUCKET_STRAW, CRUSH_HASH_RJENKINS1,
+ root_type, 0, NULL, NULL, &rootno);
+ c->set_item_name(rootno, "default");
+
+ map<string,string> loc;
+ loc["root"] = "default";
+
+ int num_host = 4;
+ int num_osd = 5;
+ int osd = 0;
+ for (int h=0; h<num_host; ++h) {
+ loc["host"] = string("host-") + stringify(h);
+ for (int o=0; o<num_osd; ++o, ++osd) {
+ c->insert_item(g_ceph_context, osd, 1.0, string("osd.") + stringify(osd), loc);
+ }
+ }
+
+ c->finalize();
+
+ {
+ stringstream ss;
+ ErasureCodeJerasureReedSolomonVandermonde jerasure;
+ ErasureCodeProfile profile;
+ profile["k"] = "2";
+ profile["m"] = "2";
+ profile["w"] = "8";
+ jerasure.init(profile, &cerr);
+ int ruleset = jerasure.create_rule("myrule", *c, &ss);
+ EXPECT_EQ(0, ruleset);
+ EXPECT_EQ(-EEXIST, jerasure.create_rule("myrule", *c, &ss));
+ //
+ // the minimum that is expected from the created ruleset is to
+ // successfully map get_chunk_count() devices from the crushmap,
+ // at least once.
+ //
+ vector<__u32> weight(c->get_max_devices(), 0x10000);
+ vector<int> out;
+ int x = 0;
+ c->do_rule(ruleset, x, out, jerasure.get_chunk_count(), weight, 0);
+ ASSERT_EQ(out.size(), jerasure.get_chunk_count());
+ for (unsigned i=0; i<out.size(); ++i)
+ ASSERT_NE(CRUSH_ITEM_NONE, out[i]);
+ }
+ {
+ stringstream ss;
+ ErasureCodeJerasureReedSolomonVandermonde jerasure;
+ ErasureCodeProfile profile;
+ profile["k"] = "2";
+ profile["m"] = "2";
+ profile["w"] = "8";
+ profile["crush-root"] = "BAD";
+ jerasure.init(profile, &cerr);
+ EXPECT_EQ(-ENOENT, jerasure.create_rule("otherrule", *c, &ss));
+ EXPECT_EQ("root item BAD does not exist", ss.str());
+ }
+ {
+ stringstream ss;
+ ErasureCodeJerasureReedSolomonVandermonde jerasure;
+ ErasureCodeProfile profile;
+ profile["k"] = "2";
+ profile["m"] = "2";
+ profile["w"] = "8";
+ profile["crush-failure-domain"] = "WORSE";
+ jerasure.init(profile, &cerr);
+ EXPECT_EQ(-EINVAL, jerasure.create_rule("otherrule", *c, &ss));
+ EXPECT_EQ("unknown type WORSE", ss.str());
+ }
+}
+
+/*
+ * Local Variables:
+ * compile-command: "cd ../.. ;
+ * make -j4 unittest_erasure_code_jerasure &&
+ * valgrind --tool=memcheck \
+ * ./unittest_erasure_code_jerasure \
+ * --gtest_filter=*.* --log-to-stderr=true --debug-osd=20"
+ * End:
+ */
Code Review / stor4nfv.git / blobdiff