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diff --git a/src/test/erasure-code/ceph_erasure_code_non_regression.cc b/src/test/erasure-code/ceph_erasure_code_non_regression.cc
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+++ b/src/test/erasure-code/ceph_erasure_code_non_regression.cc
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph distributed storage system
+ *
+ * Red Hat (C) 2014, 2015 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 <boost/scoped_ptr.hpp>
+#include <boost/lexical_cast.hpp>
+#include <boost/program_options/option.hpp>
+#include <boost/program_options/options_description.hpp>
+#include <boost/program_options/variables_map.hpp>
+#include <boost/program_options/cmdline.hpp>
+#include <boost/program_options/parsers.hpp>
+#include <boost/algorithm/string.hpp>
+
+#include "global/global_context.h"
+#include "global/global_init.h"
+#include "common/errno.h"
+#include "common/ceph_context.h"
+#include "common/ceph_argparse.h"
+#include "common/config.h"
+#include "erasure-code/ErasureCodePlugin.h"
+
+namespace po = boost::program_options;
+using namespace std;
+
+class ErasureCodeNonRegression {
+ unsigned stripe_width;
+ string plugin;
+ bool create;
+ bool check;
+ string base;
+ string directory;
+ ErasureCodeProfile profile;
+ boost::intrusive_ptr<CephContext> cct;
+public:
+ int setup(int argc, char** argv);
+ int run();
+ int run_create();
+ int run_check();
+ int decode_erasures(ErasureCodeInterfaceRef erasure_code,
+ set<int> erasures,
+ map<int,bufferlist> chunks);
+ string content_path();
+ string chunk_path(unsigned int chunk);
+};
+
+int ErasureCodeNonRegression::setup(int argc, char** argv) {
+
+ po::options_description desc("Allowed options");
+ desc.add_options()
+ ("help,h", "produce help message")
+ ("stripe-width,s", po::value<int>()->default_value(4 * 1024),
+ "stripe_width, i.e. the size of the buffer to be encoded")
+ ("plugin,p", po::value<string>()->default_value("jerasure"),
+ "erasure code plugin name")
+ ("base", po::value<string>()->default_value("."),
+ "prefix all paths with base")
+ ("parameter,P", po::value<vector<string> >(),
+ "add a parameter to the erasure code profile")
+ ("create", "create the erasure coded content in the directory")
+ ("check", "check the content in the directory matches the chunks and vice versa")
+ ;
+
+ po::variables_map vm;
+ po::parsed_options parsed =
+ po::command_line_parser(argc, argv).options(desc).allow_unregistered().run();
+ po::store(
+ parsed,
+ vm);
+ po::notify(vm);
+
+ vector<const char *> ceph_options;
+ vector<string> ceph_option_strings = po::collect_unrecognized(
+ parsed.options, po::include_positional);
+ ceph_options.reserve(ceph_option_strings.size());
+ for (vector<string>::iterator i = ceph_option_strings.begin();
+ i != ceph_option_strings.end();
+ ++i) {
+ ceph_options.push_back(i->c_str());
+ }
+
+ cct = global_init(NULL, ceph_options, CEPH_ENTITY_TYPE_CLIENT,
+ CODE_ENVIRONMENT_UTILITY,
+ CINIT_FLAG_NO_MON_CONFIG);
+ common_init_finish(g_ceph_context);
+ g_ceph_context->_conf.apply_changes(nullptr);
+
+ if (vm.count("help")) {
+ cout << desc << std::endl;
+ return 1;
+ }
+
+ stripe_width = vm["stripe-width"].as<int>();
+ plugin = vm["plugin"].as<string>();
+ base = vm["base"].as<string>();
+ check = vm.count("check") > 0;
+ create = vm.count("create") > 0;
+
+ if (!check && !create) {
+ cerr << "must specifify either --check, or --create" << endl;
+ return 1;
+ }
+
+ {
+ stringstream path;
+ path << base << "/" << "plugin=" << plugin << " stripe-width=" << stripe_width;
+ directory = path.str();
+ }
+
+ if (vm.count("parameter")) {
+ const vector<string> &p = vm["parameter"].as< vector<string> >();
+ for (vector<string>::const_iterator i = p.begin();
+ i != p.end();
+ ++i) {
+ std::vector<std::string> strs;
+ boost::split(strs, *i, boost::is_any_of("="));
+ if (strs.size() != 2) {
+ cerr << "--parameter " << *i << " ignored because it does not contain exactly one =" << endl;
+ } else {
+ profile[strs[0]] = strs[1];
+ }
+ directory += " " + *i;
+ }
+ }
+
+ return 0;
+}
+
+int ErasureCodeNonRegression::run()
+ {
+ int ret = 0;
+ if(create && (ret = run_create()))
+ return ret;
+ if(check && (ret = run_check()))
+ return ret;
+ return ret;
+}
+
+int ErasureCodeNonRegression::run_create()
+{
+ ErasureCodePluginRegistry &instance = ErasureCodePluginRegistry::instance();
+ ErasureCodeInterfaceRef erasure_code;
+ stringstream messages;
+ int code = instance.factory(plugin,
+ g_conf().get_val<std::string>("erasure_code_dir"),
+ profile, &erasure_code, &messages);
+ if (code) {
+ cerr << messages.str() << endl;
+ return code;
+ }
+
+ if (::mkdir(directory.c_str(), 0755)) {
+ cerr << "mkdir(" << directory << "): " << cpp_strerror(errno) << endl;
+ return 1;
+ }
+ unsigned payload_chunk_size = 37;
+ string payload;
+ for (unsigned j = 0; j < payload_chunk_size; ++j)
+ payload.push_back('a' + (rand() % 26));
+ bufferlist in;
+ for (unsigned j = 0; j < stripe_width; j += payload_chunk_size)
+ in.append(payload);
+ if (stripe_width < in.length())
+ in.splice(stripe_width, in.length() - stripe_width);
+ if (in.write_file(content_path().c_str()))
+ return 1;
+ set<int> want_to_encode;
+ for (unsigned int i = 0; i < erasure_code->get_chunk_count(); i++) {
+ want_to_encode.insert(i);
+ }
+ map<int,bufferlist> encoded;
+ code = erasure_code->encode(want_to_encode, in, &encoded);
+ if (code)
+ return code;
+ for (map<int,bufferlist>::iterator chunk = encoded.begin();
+ chunk != encoded.end();
+ ++chunk) {
+ if (chunk->second.write_file(chunk_path(chunk->first).c_str()))
+ return 1;
+ }
+ return 0;
+}
+
+int ErasureCodeNonRegression::decode_erasures(ErasureCodeInterfaceRef erasure_code,
+ set<int> erasures,
+ map<int,bufferlist> chunks)
+{
+ map<int,bufferlist> available;
+ for (map<int,bufferlist>::iterator chunk = chunks.begin();
+ chunk != chunks.end();
+ ++chunk) {
+ if (erasures.count(chunk->first) == 0)
+ available[chunk->first] = chunk->second;
+
+ }
+ map<int,bufferlist> decoded;
+ int code = erasure_code->decode(erasures, available, &decoded, available.begin()->second.length());
+ if (code)
+ return code;
+ for (set<int>::iterator erasure = erasures.begin();
+ erasure != erasures.end();
+ ++erasure) {
+ if (!chunks[*erasure].contents_equal(decoded[*erasure])) {
+ cerr << "chunk " << *erasure << " incorrectly recovered" << endl;
+ return 1;
+ }
+ }
+ return 0;
+}
+
+int ErasureCodeNonRegression::run_check()
+{
+ ErasureCodePluginRegistry &instance = ErasureCodePluginRegistry::instance();
+ ErasureCodeInterfaceRef erasure_code;
+ stringstream messages;
+ int code = instance.factory(plugin,
+ g_conf().get_val<std::string>("erasure_code_dir"),
+ profile, &erasure_code, &messages);
+ if (code) {
+ cerr << messages.str() << endl;
+ return code;
+ }
+ string errors;
+ bufferlist in;
+ if (in.read_file(content_path().c_str(), &errors)) {
+ cerr << errors << endl;
+ return 1;
+ }
+ set<int> want_to_encode;
+ for (unsigned int i = 0; i < erasure_code->get_chunk_count(); i++) {
+ want_to_encode.insert(i);
+ }
+
+ map<int,bufferlist> encoded;
+ code = erasure_code->encode(want_to_encode, in, &encoded);
+ if (code)
+ return code;
+
+ for (map<int,bufferlist>::iterator chunk = encoded.begin();
+ chunk != encoded.end();
+ ++chunk) {
+ bufferlist existing;
+ if (existing.read_file(chunk_path(chunk->first).c_str(), &errors)) {
+ cerr << errors << endl;
+ return 1;
+ }
+ bufferlist &old = chunk->second;
+ if (existing.length() != old.length() ||
+ memcmp(existing.c_str(), old.c_str(), old.length())) {
+ cerr << "chunk " << chunk->first << " encodes differently" << endl;
+ return 1;
+ }
+ }
+
+ // erasing a single chunk is likely to use a specific code path in every plugin
+ set<int> erasures;
+ erasures.clear();
+ erasures.insert(0);
+ code = decode_erasures(erasure_code, erasures, encoded);
+ if (code)
+ return code;
+
+ if (erasure_code->get_chunk_count() - erasure_code->get_data_chunk_count() > 1) {
+ // erasing two chunks is likely to be the general case
+ erasures.clear();
+ erasures.insert(0);
+ erasures.insert(erasure_code->get_chunk_count() - 1);
+ code = decode_erasures(erasure_code, erasures, encoded);
+ if (code)
+ return code;
+ }
+
+ return 0;
+}
+
+string ErasureCodeNonRegression::content_path()
+{
+ stringstream path;
+ path << directory << "/content";
+ return path.str();
+}
+
+string ErasureCodeNonRegression::chunk_path(unsigned int chunk)
+{
+ stringstream path;
+ path << directory << "/" << chunk;
+ return path.str();
+}
+
+int main(int argc, char** argv) {
+ ErasureCodeNonRegression non_regression;
+ int err = non_regression.setup(argc, argv);
+ if (err)
+ return err;
+ return non_regression.run();
+}
+
+/*
+ * Local Variables:
+ * compile-command: "cd ../.. ; make -j4 &&
+ * make ceph_erasure_code_non_regression &&
+ * libtool --mode=execute valgrind --tool=memcheck --leak-check=full \
+ * ./ceph_erasure_code_non_regression \
+ * --plugin jerasure \
+ * --parameter technique=reed_sol_van \
+ * --parameter k=2 \
+ * --parameter m=2 \
+ * --directory /tmp/ceph_erasure_code_non_regression \
+ * --stripe-width 3181 \
+ * --create \
+ * --check
+ * "
+ * End:
+ */
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