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/*
* Copyright (C) 2003-2014 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "StorageCommands.hxx"
#include "CommandError.hxx"
#include "protocol/Result.hxx"
#include "util/UriUtil.hxx"
#include "util/Error.hxx"
#include "fs/Traits.hxx"
#include "client/Client.hxx"
#include "Partition.hxx"
#include "Instance.hxx"
#include "storage/Registry.hxx"
#include "storage/CompositeStorage.hxx"
#include "db/plugins/simple/SimpleDatabasePlugin.hxx"
#include "db/update/Service.hxx"
#include "Idle.hxx"
static void
print_storage_uri(Client &client, const Storage &storage)
{
std::string uri = storage.MapUTF8("");
if (uri.empty())
return;
if (PathTraitsFS::IsAbsolute(uri.c_str())) {
/* storage points to local directory */
if (!client.IsLocal())
/* only "local" clients may see local paths
(same policy as with the "config"
command) */
return;
} else {
/* hide username/passwords from client */
std::string allocated = uri_remove_auth(uri.c_str());
if (!allocated.empty())
uri = std::move(allocated);
}
client_printf(client, "storage: %s\n", uri.c_str());
}
CommandResult
handle_listmounts(Client &client, gcc_unused int argc, gcc_unused char *argv[])
{
Storage *_composite = client.partition.instance.storage;
if (_composite == nullptr) {
command_error(client, ACK_ERROR_NO_EXIST, "No database");
return CommandResult::ERROR;
}
CompositeStorage &composite = *(CompositeStorage *)_composite;
const auto visitor = [&client](const char *mount_uri,
const Storage &storage){
client_printf(client, "mount: %s\n", mount_uri);
print_storage_uri(client, storage);
};
composite.VisitMounts(visitor);
return CommandResult::OK;
}
CommandResult
handle_mount(Client &client, gcc_unused int argc, char *argv[])
{
Storage *_composite = client.partition.instance.storage;
if (_composite == nullptr) {
command_error(client, ACK_ERROR_NO_EXIST, "No database");
return CommandResult::ERROR;
}
CompositeStorage &composite = *(CompositeStorage *)_composite;
const char *const local_uri = argv[1];
const char *const remote_uri = argv[2];
if (*local_uri == 0) {
command_error(client, ACK_ERROR_ARG, "Bad mount point");
return CommandResult::ERROR;
}
if (strchr(local_uri, '/') != nullptr) {
/* allow only top-level mounts for now */
/* TODO: eliminate this limitation after ensuring that
UpdateQueue::Erase() really gets called for every
unmount, and no Directory disappears recursively
during database update */
command_error(client, ACK_ERROR_ARG, "Bad mount point");
return CommandResult::ERROR;
}
Error error;
Storage *storage = CreateStorageURI(remote_uri, error);
if (storage == nullptr) {
if (error.IsDefined())
return print_error(client, error);
command_error(client, ACK_ERROR_ARG,
"Unrecognized storage URI");
return CommandResult::ERROR;
}
composite.Mount(local_uri, storage);
idle_add(IDLE_MOUNT);
#ifdef ENABLE_DATABASE
Database *_db = client.partition.instance.database;
if (_db != nullptr && _db->IsPlugin(simple_db_plugin)) {
SimpleDatabase &db = *(SimpleDatabase *)_db;
if (!db.Mount(local_uri, remote_uri, error)) {
composite.Unmount(local_uri);
return print_error(client, error);
}
// TODO: call Instance::OnDatabaseModified()?
// TODO: trigger database update?
idle_add(IDLE_DATABASE);
}
#endif
return CommandResult::OK;
}
CommandResult
handle_unmount(Client &client, gcc_unused int argc, char *argv[])
{
Storage *_composite = client.partition.instance.storage;
if (_composite == nullptr) {
command_error(client, ACK_ERROR_NO_EXIST, "No database");
return CommandResult::ERROR;
}
CompositeStorage &composite = *(CompositeStorage *)_composite;
const char *const local_uri = argv[1];
if (*local_uri == 0) {
command_error(client, ACK_ERROR_ARG, "Bad mount point");
return CommandResult::ERROR;
}
#ifdef ENABLE_DATABASE
if (client.partition.instance.update != nullptr)
/* ensure that no database update will attempt to work
with the database/storage instances we're about to
destroy here */
client.partition.instance.update->CancelMount(local_uri);
Database *_db = client.partition.instance.database;
if (_db != nullptr && _db->IsPlugin(simple_db_plugin)) {
SimpleDatabase &db = *(SimpleDatabase *)_db;
if (db.Unmount(local_uri))
// TODO: call Instance::OnDatabaseModified()?
idle_add(IDLE_DATABASE);
}
#endif
if (!composite.Unmount(local_uri)) {
command_error(client, ACK_ERROR_ARG, "Not a mount point");
return CommandResult::ERROR;
}
idle_add(IDLE_MOUNT);
return CommandResult::OK;
}
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