284 lines
7.0 KiB
C++
284 lines
7.0 KiB
C++
// Copyright (C) 2016 Red Hat, Inc. All rights reserved.
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//
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// This file is part of the thin-provisioning-tools source.
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//
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// thin-provisioning-tools is free software: you can redistribute it
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// and/or modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// thin-provisioning-tools is distributed in the hope that it will be
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// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with thin-provisioning-tools. If not, see
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// <http://www.gnu.org/licenses/>.
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#include "base/output_file_requirements.h"
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#include "persistent-data/file_utils.h"
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#include "thin-provisioning/commands.h"
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#include "thin-provisioning/thin_pool.h"
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#include "version.h"
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#include <boost/optional.hpp>
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#include <getopt.h>
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#include <unistd.h>
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using namespace boost;
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using namespace thin_provisioning;
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//----------------------------------------------------------------
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namespace {
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struct flags {
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enum metadata_operations {
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METADATA_OP_NONE,
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METADATA_OP_FORMAT,
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METADATA_OP_OPEN,
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METADATA_OP_CREATE_THIN,
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METADATA_OP_CREATE_SNAP,
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METADATA_OP_DELETE_DEV,
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METADATA_OP_SET_TRANSACTION_ID,
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METADATA_OP_RESERVE_METADATA_SNAP,
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METADATA_OP_RELEASE_METADATA_SNAP,
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METADATA_OP_SET_NEEDS_CHECK,
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METADATA_OP_LAST
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};
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flags()
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: op(METADATA_OP_NONE),
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data_block_size(128),
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nr_data_blocks(10240)
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{
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}
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bool check_conformance();
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metadata_operations op;
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sector_t data_block_size;
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block_address nr_data_blocks;
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optional<thin_dev_t> dev_id;
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optional<thin_dev_t> origin;
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optional<uint64_t> trans_id;
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optional<string> output;
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};
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// FIXME: modulize the conditions
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bool flags::check_conformance() {
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if (op == METADATA_OP_NONE || op >= METADATA_OP_LAST) {
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cerr << "Invalid operation." << endl;
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return false;
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}
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if (!output) {
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cerr << "No output file provided." << endl;
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return false;
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} else
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check_output_file_requirements(*output);
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if (op == METADATA_OP_CREATE_THIN && !dev_id) {
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cerr << "no device id provided." << endl;
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return false;
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}
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if (op == METADATA_OP_CREATE_SNAP && (!dev_id || !origin)) {
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cerr << "no device id provided." << endl;
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return false;
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}
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if (op == METADATA_OP_DELETE_DEV && !dev_id) {
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cerr << "no device id provided." << endl;
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return false;
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}
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if (op == METADATA_OP_SET_TRANSACTION_ID && !trans_id) {
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cerr << "no transaction id provided." << endl;
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return false;
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}
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return true;
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}
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//--------------------------------
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thin_pool::ptr open_or_create_pool(flags const &fs) {
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block_manager::ptr bm = open_bm(*fs.output, block_manager::READ_WRITE);
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if (fs.op == flags::METADATA_OP_FORMAT)
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return thin_pool::ptr(new thin_pool(bm, fs.data_block_size, fs.nr_data_blocks));
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else
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return thin_pool::ptr(new thin_pool(bm));
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}
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int generate_metadata(flags const &fs) {
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thin_pool::ptr pool = open_or_create_pool(fs);
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switch (fs.op) {
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case flags::METADATA_OP_CREATE_THIN:
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pool->create_thin(*fs.dev_id);
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break;
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case flags::METADATA_OP_CREATE_SNAP:
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pool->create_snap(*fs.dev_id, *fs.origin);
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break;
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case flags::METADATA_OP_DELETE_DEV:
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pool->del(*fs.dev_id);
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break;
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case flags::METADATA_OP_SET_TRANSACTION_ID:
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pool->set_transaction_id(*fs.trans_id);
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break;
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case flags::METADATA_OP_RESERVE_METADATA_SNAP:
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pool->reserve_metadata_snap();
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break;
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case flags::METADATA_OP_RELEASE_METADATA_SNAP:
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pool->release_metadata_snap();
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break;
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case flags::METADATA_OP_SET_NEEDS_CHECK:
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pool->set_needs_check();
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break;
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default:
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break;
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}
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pool->commit();
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return 0;
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}
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}
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//----------------------------------------------------------------
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thin_generate_metadata_cmd::thin_generate_metadata_cmd()
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: command("thin_generate_metadata")
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{
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}
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void
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thin_generate_metadata_cmd::usage(std::ostream &out) const
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{
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out << "Usage: " << get_name() << " [options]\n"
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<< "Options:\n"
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<< " {-h|--help}\n"
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<< " {--format}\n"
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<< " {--create-thin} <dev-id>\n"
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<< " {--create-snap} <dev-id>\n"
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<< " {--delete} <dev-id>\n"
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<< " {--reserve-metadata-snap}\n"
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<< " {--release-metadata-snap}\n"
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<< " {--set-transaction-id} <tid>\n"
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<< " {--set-needs-check}\n"
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<< " {--data-block-size} <block size>\n"
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<< " {--nr-data-blocks} <nr>\n"
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<< " {--origin} <origin-id>\n"
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<< " {-o|--output} <output device or file>\n"
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<< " {-V|--version}" << endl;
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}
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int
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thin_generate_metadata_cmd::run(int argc, char **argv)
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{
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int c;
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struct flags fs;
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const char *shortopts = "ho:V";
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const struct option longopts[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "output", required_argument, NULL, 'o' },
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{ "format", no_argument, NULL, 1 },
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{ "open", no_argument, NULL, 2 },
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{ "create-thin", required_argument, NULL, 3 },
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{ "create-snap", required_argument, NULL, 4 },
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{ "delete", required_argument, NULL, 5 },
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{ "set-transaction-id", required_argument, NULL, 6 },
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{ "reserve-metadata-snap", no_argument, NULL, 7 },
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{ "release-metadata-snap", no_argument, NULL, 8 },
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{ "set-needs-check", no_argument, NULL, 9 },
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{ "data-block-size", required_argument, NULL, 1001 },
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{ "nr-data-blocks", required_argument, NULL, 1002 },
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{ "origin", required_argument, NULL, 4001 },
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{ "version", no_argument, NULL, 'V' },
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{ NULL, no_argument, NULL, 0 }
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};
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while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
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switch(c) {
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case 'h':
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usage(cout);
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return 0;
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case 'o':
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fs.output = optarg;
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break;
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case 1:
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fs.op = flags::METADATA_OP_FORMAT;
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break;
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case 2:
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fs.op = flags::METADATA_OP_OPEN;
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break;
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case 3:
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fs.op = flags::METADATA_OP_CREATE_THIN;
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fs.dev_id = parse_uint64(optarg, "device id");
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break;
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case 4:
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fs.op = flags::METADATA_OP_CREATE_SNAP;
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fs.dev_id = parse_uint64(optarg, "device id");
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break;
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case 5:
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fs.op = flags::METADATA_OP_DELETE_DEV;
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fs.dev_id = parse_uint64(optarg, "device id");
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break;
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case 6:
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fs.op = flags::METADATA_OP_SET_TRANSACTION_ID;
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fs.trans_id = parse_uint64(optarg, "transaction id");
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break;
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case 7:
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fs.op = flags::METADATA_OP_RESERVE_METADATA_SNAP;
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break;
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case 8:
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fs.op = flags::METADATA_OP_RELEASE_METADATA_SNAP;
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break;
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case 9:
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fs.op = flags::METADATA_OP_SET_NEEDS_CHECK;
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break;
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case 1001:
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fs.data_block_size = parse_uint64(optarg, "data block size");
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break;
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case 1002:
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fs.nr_data_blocks = parse_uint64(optarg, "nr data blocks");
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break;
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case 4001:
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fs.origin = parse_uint64(optarg, "origin");
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break;
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case 'V':
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cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
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return 0;
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default:
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usage(cerr);
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return 1;
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}
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}
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if (!fs.check_conformance()) {
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usage(cerr);
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return 1;
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}
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return generate_metadata(fs);
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}
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//----------------------------------------------------------------
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