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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2015 Red Hat
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <errno.h>
#if __has_include(<filesystem>)
#include <filesystem>
namespace fs = std::filesystem;
#else
#include <experimental/filesystem>
namespace fs = std::experimental::filesystem;
#endif
#include "ceph_ver.h"
#include "include/types.h"
#include "common/Formatter.h"
#include "common/ceph_argparse.h"
#include "common/errno.h"
#include "denc_plugin.h"
#include "denc_registry.h"
#define MB(m) ((m) * 1024 * 1024)
void usage(ostream &out)
{
out << "usage: ceph-dencoder [commands ...]" << std::endl;
out << "\n";
out << " version print version string (to stdout)\n";
out << "\n";
out << " import <encfile> read encoded data from encfile\n";
out << " export <outfile> write encoded data to outfile\n";
out << "\n";
out << " set_features <num> set feature bits used for encoding\n";
out << " get_features print feature bits (int) to stdout\n";
out << "\n";
out << " list_types list supported types\n";
out << " type <classname> select in-memory type\n";
out << " skip <num> skip <num> leading bytes before decoding\n";
out << " decode decode into in-memory object\n";
out << " encode encode in-memory object\n";
out << " dump_json dump in-memory object as json (to stdout)\n";
out << " hexdump print encoded data in hex\n";
out << " get_struct_v print version of the encoded object\n";
out << " get_struct_compat print the oldest version of decoder that can decode the encoded object\n";
out << "\n";
out << " copy copy object (via operator=)\n";
out << " copy_ctor copy object (via copy ctor)\n";
out << "\n";
out << " count_tests print number of generated test objects (to stdout)\n";
out << " select_test <n> select generated test object as in-memory object\n";
out << " is_deterministic exit w/ success if type encodes deterministically\n";
}
vector<DencoderPlugin> load_plugins()
{
fs::path mod_dir{CEPH_DENC_MOD_DIR};
if (auto ceph_lib = getenv("CEPH_LIB"); ceph_lib) {
mod_dir = ceph_lib;
} else if (fs::is_regular_file("CMakeCache.txt")) {
mod_dir = fs::canonical("lib");
}
vector<DencoderPlugin> dencoder_plugins;
for (auto& entry : fs::directory_iterator(mod_dir)) {
static const string_view DENC_MOD_PREFIX = "denc-mod-";
if (entry.path().stem().string().compare(0, DENC_MOD_PREFIX.size(),
DENC_MOD_PREFIX) != 0) {
continue;
}
DencoderPlugin plugin(entry);
if (!plugin.good()) {
continue;
}
dencoder_plugins.push_back(std::move(plugin));
}
return dencoder_plugins;
}
int main(int argc, const char **argv)
{
vector<DencoderPlugin> plugins = load_plugins();
DencoderRegistry registry;
for (auto& plugin : plugins) {
for (auto& [name, denc] : plugin.register_dencoders()) {
registry.register_dencoder(name, denc);
}
}
vector<const char*> args;
argv_to_vec(argc, argv, args);
env_to_vec(args);
Dencoder *den = NULL;
uint64_t features = CEPH_FEATURES_SUPPORTED_DEFAULT;
bufferlist encbl;
uint64_t skip = 0;
if (args.empty()) {
cerr << "-h for help" << std::endl;
return 1;
}
for (std::vector<const char*>::iterator i = args.begin(); i != args.end(); ++i) {
string err;
auto& dencoders = registry.get();
if (*i == string("help") || *i == string("-h") || *i == string("--help")) {
usage(cout);
return 0;
} else if (*i == string("version")) {
cout << CEPH_GIT_NICE_VER << std::endl;
} else if (*i == string("list_types")) {
for (auto& dencoder : dencoders)
cout << dencoder.first << std::endl;
return 0;
} else if (*i == string("type")) {
++i;
if (i == args.end()) {
cerr << "expecting type" << std::endl;
return 1;
}
string cname = *i;
if (!dencoders.count(cname)) {
cerr << "class '" << cname << "' unknown" << std::endl;
return 1;
}
den = dencoders[cname];
den->generate();
} else if (*i == string("skip")) {
++i;
if (i == args.end()) {
cerr << "expecting byte count" << std::endl;
return 1;
}
skip = atoi(*i);
} else if (*i == string("get_features")) {
cout << CEPH_FEATURES_SUPPORTED_DEFAULT << std::endl;
return 0;
} else if (*i == string("set_features")) {
++i;
if (i == args.end()) {
cerr << "expecting features" << std::endl;
return 1;
}
features = atoll(*i);
} else if (*i == string("encode")) {
if (!den) {
cerr << "must first select type with 'type <name>'" << std::endl;
return 1;
}
den->encode(encbl, features | CEPH_FEATURE_RESERVED); // hack for OSDMap
} else if (*i == string("decode")) {
if (!den) {
cerr << "must first select type with 'type <name>'" << std::endl;
return 1;
}
err = den->decode(encbl, skip);
} else if (*i == string("copy_ctor")) {
if (!den) {
cerr << "must first select type with 'type <name>'" << std::endl;
return 1;
}
den->copy_ctor();
} else if (*i == string("copy")) {
if (!den) {
cerr << "must first select type with 'type <name>'" << std::endl;
return 1;
}
den->copy();
} else if (*i == string("dump_json")) {
if (!den) {
cerr << "must first select type with 'type <name>'" << std::endl;
return 1;
}
JSONFormatter jf(true);
jf.open_object_section("object");
den->dump(&jf);
jf.close_section();
jf.flush(cout);
cout << std::endl;
} else if (*i == string("hexdump")) {
encbl.hexdump(cout);
} else if (*i == string("get_struct_v")) {
std::cout << den->get_struct_v(encbl, 0) << std::endl;
} else if (*i == string("get_struct_compat")) {
std::cout << den->get_struct_v(encbl, sizeof(uint8_t)) << std::endl;
} else if (*i == string("import")) {
++i;
if (i == args.end()) {
cerr << "expecting filename" << std::endl;
return 1;
}
int r;
if (*i == string("-")) {
*i = "stdin";
// Read up to 1mb if stdin specified
r = encbl.read_fd(STDIN_FILENO, MB(1));
} else {
r = encbl.read_file(*i, &err);
}
if (r < 0) {
cerr << "error reading " << *i << ": " << err << std::endl;
return 1;
}
} else if (*i == string("export")) {
++i;
if (i == args.end()) {
cerr << "expecting filename" << std::endl;
return 1;
}
int fd = ::open(*i, O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0644);
if (fd < 0) {
cerr << "error opening " << *i << " for write: " << cpp_strerror(errno) << std::endl;
return 1;
}
int r = encbl.write_fd(fd);
if (r < 0) {
cerr << "error writing " << *i << ": " << cpp_strerror(errno) << std::endl;
return 1;
}
::close(fd);
} else if (*i == string("count_tests")) {
if (!den) {
cerr << "must first select type with 'type <name>'" << std::endl;
return 1;
}
cout << den->num_generated() << std::endl;
} else if (*i == string("select_test")) {
if (!den) {
cerr << "must first select type with 'type <name>'" << std::endl;
return 1;
}
++i;
if (i == args.end()) {
cerr << "expecting instance number" << std::endl;
return 1;
}
int n = atoi(*i);
err = den->select_generated(n);
} else if (*i == string("is_deterministic")) {
if (!den) {
cerr << "must first select type with 'type <name>'" << std::endl;
return 1;
}
if (den->is_deterministic())
return 0;
else
return 1;
} else {
cerr << "unknown option '" << *i << "'" << std::endl;
return 1;
}
if (err.length()) {
cerr << "error: " << err << std::endl;
return 1;
}
}
return 0;
}
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