227 lines
6.6 KiB
C++
227 lines
6.6 KiB
C++
// Copyright (c) MIND Software LLC, 2023 (info@mindsw.io)
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// I accept Vitastor CLA: see CLA-en.md for details
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// Copyright (c) Vitaliy Filippov, 2024
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// License: VNPL-1.1 (see README.md for details)
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#include <ctype.h>
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#include "cli.h"
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#include "cluster_client.h"
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#include "str_util.h"
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struct pool_remover_t
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{
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cli_tool_t *parent;
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// Required parameters (id/name)
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pool_id_t pool_id = 0;
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std::string pool_name;
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// Force removal
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bool force;
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int state = 0;
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cli_result_t result;
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// Is pool valid?
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bool pool_valid = false;
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// Updated pools
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json11::Json new_pools;
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// Expected pools mod revision
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uint64_t pools_mod_rev;
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bool is_done() { return state == 100; }
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void loop()
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{
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if (state == 1)
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goto resume_1;
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else if (state == 2)
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goto resume_2;
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else if (state == 3)
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goto resume_3;
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// Pool name (or id) required
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if (!pool_id && pool_name == "")
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{
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result = (cli_result_t){ .err = EINVAL, .text = "Pool name or id must be given" };
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state = 100;
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return;
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}
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// Validate pool name/id
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// Get pool id by name (if name given)
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if (pool_name != "")
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{
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for (auto & ic: parent->cli->st_cli.pool_config)
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{
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if (ic.second.name == pool_name)
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{
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pool_id = ic.first;
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pool_valid = 1;
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break;
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}
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}
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}
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// Otherwise, check if given pool id is valid
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else
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{
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// Set pool name from id (for easier logging)
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pool_name = "id " + std::to_string(pool_id);
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// Look-up pool id in pool_config
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if (parent->cli->st_cli.pool_config.find(pool_id) != parent->cli->st_cli.pool_config.end())
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{
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pool_valid = 1;
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}
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}
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// Need a valid pool to proceed
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if (!pool_valid)
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{
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result = (cli_result_t){ .err = ENOENT, .text = "Pool "+pool_name+" does not exist" };
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state = 100;
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return;
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}
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// Unless forced, check if pool has associated Images/Snapshots
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if (!force)
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{
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std::string images;
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for (auto & ic: parent->cli->st_cli.inode_config)
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{
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if (pool_id && INODE_POOL(ic.second.num) != pool_id)
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{
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continue;
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}
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images += ((images != "") ? ", " : "") + ic.second.name;
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}
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if (images != "")
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{
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result = (cli_result_t){
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.err = ENOTEMPTY,
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.text =
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"Pool "+pool_name+" cannot be removed as it still has the following "
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"images/snapshots associated with it: "+images
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};
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state = 100;
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return;
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}
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}
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// Proceed to deleting the pool
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state = 1;
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do
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{
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resume_1:
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// Get pools from etcd
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parent->etcd_txn(json11::Json::object {
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{ "success", json11::Json::array {
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json11::Json::object {
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{ "request_range", json11::Json::object {
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{ "key", base64_encode(parent->cli->st_cli.etcd_prefix+"/config/pools") },
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} }
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},
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} },
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});
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state = 2;
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resume_2:
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if (parent->waiting > 0)
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return;
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if (parent->etcd_err.err)
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{
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result = parent->etcd_err;
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state = 100;
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return;
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}
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{
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// Parse received pools from etcd
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auto kv = parent->cli->st_cli.parse_etcd_kv(parent->etcd_result["responses"][0]["response_range"]["kvs"][0]);
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// Remove pool
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auto p = kv.value.object_items();
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if (p.erase(std::to_string(pool_id)) != 1)
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{
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result = (cli_result_t){
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.err = ENOENT,
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.text = "Failed to erase pool "+pool_name+" from: "+kv.value.string_value()
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};
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state = 100;
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return;
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}
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// Record updated pools
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new_pools = p;
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// Expected pools mod revision
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pools_mod_rev = kv.mod_revision;
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}
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// Update pools in etcd
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parent->etcd_txn(json11::Json::object {
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{ "compare", json11::Json::array {
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json11::Json::object {
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{ "target", "MOD" },
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{ "key", base64_encode(parent->cli->st_cli.etcd_prefix+"/config/pools") },
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{ "result", "LESS" },
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{ "mod_revision", pools_mod_rev+1 },
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}
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} },
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{ "success", json11::Json::array {
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json11::Json::object {
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{ "request_put", json11::Json::object {
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{ "key", base64_encode(parent->cli->st_cli.etcd_prefix+"/config/pools") },
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{ "value", base64_encode(new_pools.dump()) },
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} },
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},
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} },
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});
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state = 3;
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resume_3:
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if (parent->waiting > 0)
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return;
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if (parent->etcd_err.err)
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{
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result = parent->etcd_err;
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state = 100;
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return;
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}
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} while (!parent->etcd_result["succeeded"].bool_value());
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// Successfully deleted pool
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result = (cli_result_t){
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.err = 0,
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.text = "Pool "+pool_name+" deleted",
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.data = new_pools
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};
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state = 100;
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}
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};
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std::function<bool(cli_result_t &)> cli_tool_t::start_pool_rm(json11::Json cfg)
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{
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auto pool_remover = new pool_remover_t();
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pool_remover->parent = this;
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pool_remover->pool_id = cfg["pool"].uint64_value();
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pool_remover->pool_name = pool_remover->pool_id ? "" : cfg["pool"].as_string();
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pool_remover->force = !cfg["force"].is_null();
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return [pool_remover](cli_result_t & result)
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{
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pool_remover->loop();
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if (pool_remover->is_done())
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{
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result = pool_remover->result;
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delete pool_remover;
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return true;
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}
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return false;
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};
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}
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