| // Copyright 2019 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. |
| |
| #ifndef ZIRCON_SYSTEM_ULIB_MINFS_INSPECTOR_LOADER_H_ |
| #define ZIRCON_SYSTEM_ULIB_MINFS_INSPECTOR_LOADER_H_ |
| |
| #include <fs/transaction/transaction_handler.h> |
| #include <minfs/format.h> |
| #include <storage/buffer/block_buffer.h> |
| |
| namespace minfs { |
| |
| // Wrapper arround fs::TransactionHandler to load on-disk structures from a block-device |
| // into a passed-in BlockBuffer. Loading functions return an error status if the passed |
| // in buffer to load into is not large enough to fit the loaded data. |
| class Loader { |
| public: |
| explicit Loader(fs::TransactionHandler* handler) : handler_(handler) {} |
| |
| // Loads the superblock at the device offset from the block device backing the |
| // handler to the start of the buffer. |
| zx_status_t LoadSuperblock(uint64_t dev_offset, storage::BlockBuffer* buffer) const; |
| |
| // Loads the inode bitmap at the location specified by the superblock to the start of the buffer. |
| zx_status_t LoadInodeBitmap(const Superblock& superblock, storage::BlockBuffer* buffer) const; |
| |
| // Loads the inode table at the location specified by the superblock to the start of the buffer. |
| zx_status_t LoadInodeTable(const Superblock& superblock, storage::BlockBuffer* buffer) const; |
| |
| // Loads the journal at the location specified by the superblock to the start of the buffer. |
| zx_status_t LoadJournal(const Superblock& superblock, storage::BlockBuffer* buffer) const; |
| |
| // Wrapper to send a read operation into |buffer| at the specified locations to the underlying |
| // TransactionHandler. |
| zx_status_t RunReadOperation(storage::BlockBuffer* buffer, uint64_t vmo_offset, |
| uint64_t dev_offset, uint64_t length) const; |
| |
| // Wrapper to send a write operation from |buffer| at the specified loations to the underlying |
| // TransactionHandler. |
| zx_status_t RunWriteOperation(storage::BlockBuffer* buffer, uint64_t vmo_offset, |
| uint64_t dev_offset, uint64_t length) const; |
| |
| private: |
| fs::TransactionHandler* handler_; |
| }; |
| } // namespace minfs |
| |
| #endif // ZIRCON_SYSTEM_ULIB_MINFS_INSPECTOR_LOADER_H_ |