| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <lib/cksum.h> |
| #include <lib/syslog/cpp/macros.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <memory> |
| #include <utility> |
| |
| #include <bitmap/raw-bitmap.h> |
| #include <storage/buffer/block_buffer.h> |
| |
| #include "src/lib/storage/vfs/cpp/transaction/buffered_operations_builder.h" |
| #include "src/storage/minfs/superblock.h" |
| |
| namespace minfs { |
| |
| SuperblockManager::SuperblockManager(const Superblock& info) { |
| memcpy(info_blk_, &info, sizeof(Superblock)); |
| } |
| |
| SuperblockManager::~SuperblockManager() = default; |
| |
| // static |
| zx::status<std::unique_ptr<SuperblockManager>> SuperblockManager::Create(const Superblock& info, |
| uint32_t max_blocks, |
| IntegrityCheck checks) { |
| if (checks == IntegrityCheck::kAll) { |
| if (auto status = CheckSuperblock(info, max_blocks); status.is_error()) { |
| FX_LOGS(ERROR) << "SuperblockManager::Create failed to check info: " << status.error_value(); |
| return status.take_error(); |
| } |
| } |
| |
| auto sb = std::unique_ptr<SuperblockManager>(new SuperblockManager(info)); |
| return zx::ok(std::move(sb)); |
| } |
| |
| void SuperblockManager::Write(PendingWork* transaction, UpdateBackupSuperblock write_backup) { |
| UpdateChecksum(MutableInfo()); |
| fs::internal::BorrowedBuffer data(info_blk_); |
| |
| storage::Operation operation = { |
| .type = storage::OperationType::kWrite, |
| .vmo_offset = 0, |
| .dev_offset = kSuperblockStart, |
| .length = 1, |
| }; |
| transaction->EnqueueMetadata(operation, &data); |
| |
| if (write_backup == UpdateBackupSuperblock::kUpdate) { |
| blk_t superblock_dev_offset = kNonFvmSuperblockBackup; |
| |
| if (MutableInfo()->flags & kMinfsFlagFVM) { |
| superblock_dev_offset = kFvmSuperblockBackup; |
| } |
| |
| storage::Operation operation = { |
| .type = storage::OperationType::kWrite, |
| .vmo_offset = 0, |
| .dev_offset = superblock_dev_offset, |
| .length = 1, |
| }; |
| transaction->EnqueueMetadata(operation, &data); |
| } |
| |
| dirty_ = false; |
| } |
| |
| } // namespace minfs |