Atmosphere/libraries/libstratosphere/source/fs/fs_content_storage.cpp

98 lines
3.9 KiB
C++

/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "fsa/fs_mount_utils.hpp"
namespace ams::fs {
namespace {
class ContentStorageCommonMountNameGenerator : public fsa::ICommonMountNameGenerator, public impl::Newable {
private:
const ContentStorageId id;
public:
explicit ContentStorageCommonMountNameGenerator(ContentStorageId i) : id(i) { /* ... */ }
virtual Result GenerateCommonMountName(char *dst, size_t dst_size) override {
/* Determine how much space we need. */
const size_t needed_size = strnlen(GetContentStorageMountName(id), MountNameLengthMax) + 2;
AMS_ABORT_UNLESS(dst_size >= needed_size);
/* Generate the name. */
auto size = util::SNPrintf(dst, dst_size, "%s:", GetContentStorageMountName(id));
AMS_ASSERT(static_cast<size_t>(size) == needed_size - 1);
return ResultSuccess();
}
};
}
const char *GetContentStorageMountName(ContentStorageId id) {
switch (id) {
case ContentStorageId::System: return impl::ContentStorageSystemMountName;
case ContentStorageId::User: return impl::ContentStorageUserMountName;
case ContentStorageId::SdCard: return impl::ContentStorageSdCardMountName;
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
Result MountContentStorage(ContentStorageId id) {
return MountContentStorage(GetContentStorageMountName(id), id);
}
Result MountContentStorage(const char *name, ContentStorageId id) {
/* Validate the mount name. */
R_TRY(impl::CheckMountNameAllowingReserved(name));
/* It can take some time for the system partition to be ready (if it's on the SD card). */
/* Thus, we will retry up to 10 times, waiting one second each time. */
constexpr size_t MaxRetries = 10;
constexpr auto RetryInterval = TimeSpan::FromSeconds(1);
/* Mount the content storage, use libnx bindings. */
::FsFileSystem fs;
for (size_t i = 0; i < MaxRetries; i++) {
/* Try to open the filesystem. */
R_TRY_CATCH(fsOpenContentStorageFileSystem(std::addressof(fs), static_cast<::FsContentStorageId>(id))) {
R_CATCH(fs::ResultSystemPartitionNotReady) {
if (i < MaxRetries - 1) {
os::SleepThread(RetryInterval);
continue;
} else {
return fs::ResultSystemPartitionNotReady();
}
}
} R_END_TRY_CATCH;
/* The filesystem was opened successfully. */
break;
}
/* Allocate a new filesystem wrapper. */
auto fsa = std::make_unique<RemoteFileSystem>(fs);
R_UNLESS(fsa != nullptr, fs::ResultAllocationFailureInContentStorageA());
/* Allocate a new mountname generator. */
auto generator = std::make_unique<ContentStorageCommonMountNameGenerator>(id);
R_UNLESS(generator != nullptr, fs::ResultAllocationFailureInContentStorageB());
/* Register. */
return fsa::Register(name, std::move(fsa), std::move(generator));
}
}