thin-provisioning-tools/thin-provisioning/thin_generate_metadata.cc

257 lines
6.1 KiB
C++
Raw Normal View History

2016-07-15 15:53:07 +05:30
// Copyright (C) 2016 Red Hat, Inc. All rights reserved.
//
// This file is part of the thin-provisioning-tools source.
//
// thin-provisioning-tools is free software: you can redistribute it
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// thin-provisioning-tools is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with thin-provisioning-tools. If not, see
// <http://www.gnu.org/licenses/>.
#include "base/output_file_requirements.h"
#include "persistent-data/file_utils.h"
#include "thin-provisioning/commands.h"
2016-07-15 15:53:07 +05:30
#include "thin-provisioning/metadata.h"
#include "version.h"
#include <boost/optional.hpp>
#include <getopt.h>
#include <unistd.h>
2016-07-15 15:53:07 +05:30
using namespace boost;
using namespace persistent_data;
using namespace std;
using namespace thin_provisioning;
//----------------------------------------------------------------
2016-07-15 15:53:07 +05:30
namespace {
struct flags {
enum metadata_operations {
METADATA_OP_NONE,
METADATA_OP_FORMAT,
METADATA_OP_OPEN,
METADATA_OP_CREATE_THIN,
METADATA_OP_LAST
};
2016-07-15 15:53:07 +05:30
flags()
: op(METADATA_OP_NONE),
data_block_size(128),
nr_data_blocks(10240)
{
2016-07-15 15:53:07 +05:30
}
bool check_conformance();
metadata_operations op;
sector_t data_block_size;
2016-07-15 15:53:07 +05:30
block_address nr_data_blocks;
optional<uint64_t> dev_id;
2016-07-15 15:53:07 +05:30
optional<string> output;
};
// FIXME: modulize the conditions
bool flags::check_conformance() {
if (op == METADATA_OP_NONE || op >= METADATA_OP_LAST) {
cerr << "Invalid operation." << endl;
return false;
}
if (!output) {
cerr << "No output file provided." << endl;
return false;
} else
check_output_file_requirements(*output);
if (op == METADATA_OP_CREATE_THIN && !dev_id) {
cerr << "no device id provided." << endl;
return false;
}
return true;
}
//--------------------------------
single_mapping_tree::ptr new_mapping_tree(metadata::ptr md) {
return single_mapping_tree::ptr(
new single_mapping_tree(*md->tm_,
mapping_tree_detail::block_time_ref_counter(md->data_sm_)));
}
bool is_device_exists(metadata::ptr md, uint64_t dev_id) {
uint64_t key[1] = {dev_id};
device_tree::maybe_value v1 = md->details_->lookup(key);
if (v1)
return true;
dev_tree::maybe_value v2 = md->mappings_top_level_->lookup(key);
if (v2)
return true;
return false;
}
//--------------------------------
metadata::ptr format_metadata(block_manager::ptr bm,
sector_t data_block_size,
block_address nr_data_blocks) {
metadata::ptr md(new metadata(bm,
metadata::CREATE,
data_block_size,
nr_data_blocks));
md->commit();
return md;
}
metadata::ptr open_metadata(block_manager::ptr bm) {
metadata::ptr md(new metadata(bm, true));
return md;
}
void create_thin(metadata::ptr md, uint64_t dev_id) {
uint64_t key[1] = {dev_id};
if (is_device_exists(md, dev_id))
throw runtime_error("device already exists");
device_tree_detail::device_details details;
details.transaction_id_ = md->sb_.trans_id_;
details.creation_time_ = md->sb_.time_;
details.snapshotted_time_ = details.creation_time_;
md->details_->insert(key, details);
single_mapping_tree::ptr subtree = new_mapping_tree(md);
md->mappings_top_level_->insert(key, subtree->get_root());
md->mappings_->set_root(md->mappings_top_level_->get_root()); // FIXME: ugly
md->commit();
}
metadata::ptr open_or_format_metadata(block_manager::ptr bm, flags const &fs) {
if (fs.op == flags::METADATA_OP_FORMAT)
return format_metadata(bm, fs.data_block_size, fs.nr_data_blocks);
else
return open_metadata(bm);
}
int generate_metadata(flags const &fs) {
block_manager::ptr bm = open_bm(*fs.output, block_manager::READ_WRITE);
metadata::ptr md = open_or_format_metadata(bm, fs);
switch (fs.op) {
case flags::METADATA_OP_CREATE_THIN:
create_thin(md, *fs.dev_id);
break;
default:
break;
}
return 0;
}
2016-07-15 15:53:07 +05:30
}
//----------------------------------------------------------------
thin_generate_metadata_cmd::thin_generate_metadata_cmd()
: command("thin_generate_metadata")
{
}
void
thin_generate_metadata_cmd::usage(std::ostream &out) const
{
2016-07-15 15:53:07 +05:30
out << "Usage: " << get_name() << " [options]\n"
<< "Options:\n"
<< " {-h|--help}\n"
<< " --data-block-size <block size>\n"
<< " --nr-data-blocks <nr>\n"
<< " {-o|--output} <output device or file>\n"
<< " {-V|--version}" << endl;
}
int
thin_generate_metadata_cmd::run(int argc, char **argv)
{
2016-07-15 15:53:07 +05:30
int c;
struct flags fs;
const char *shortopts = "hi:o:qV";
const struct option longopts[] = {
{ "help", no_argument, NULL, 'h' },
{ "output", required_argument, NULL, 'o' },
{ "format", no_argument, NULL, 1 },
{ "open", no_argument, NULL, 2 },
{ "create-thin", no_argument, NULL, 3 },
{ "data-block-size", required_argument, NULL, 101 },
{ "nr-data-blocks", required_argument, NULL, 102 },
{ "dev-id", required_argument, NULL, 301 },
{ "version", no_argument, NULL, 'V' },
2016-07-15 15:53:07 +05:30
{ NULL, no_argument, NULL, 0 }
};
while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
switch(c) {
case 'h':
usage(cout);
return 0;
case 'o':
fs.output = optarg;
break;
case 1:
fs.op = flags::METADATA_OP_FORMAT;
break;
case 2:
fs.op = flags::METADATA_OP_OPEN;
break;
case 3:
fs.op = flags::METADATA_OP_CREATE_THIN;
break;
case 101:
2016-07-15 15:53:07 +05:30
fs.data_block_size = parse_uint64(optarg, "data block size");
break;
case 102:
2016-07-15 15:53:07 +05:30
fs.nr_data_blocks = parse_uint64(optarg, "nr data blocks");
break;
case 301:
fs.dev_id = parse_uint64(optarg, "dev id");
break;
2016-07-15 15:53:07 +05:30
case 'V':
cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
return 0;
default:
usage(cerr);
return 1;
}
}
if (!fs.check_conformance()) {
2016-07-15 15:53:07 +05:30
usage(cerr);
return 1;
}
return generate_metadata(fs);
}
//----------------------------------------------------------------