| // 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. |
| |
| #ifndef ZIRCON_SYSTEM_ULIB_BLOBFS_TEST_UNIT_UTILS_H_ |
| #define ZIRCON_SYSTEM_ULIB_BLOBFS_TEST_UNIT_UTILS_H_ |
| |
| #include <memory> |
| #include <optional> |
| |
| #include <block-client/cpp/block-device.h> |
| #include <fbl/auto_lock.h> |
| #include <fbl/vector.h> |
| #include <zxtest/zxtest.h> |
| |
| #include "allocator/allocator.h" |
| #include "transaction-manager.h" |
| |
| namespace blobfs { |
| |
| constexpr uint32_t kBlockSize = kBlobfsBlockSize; |
| constexpr groupid_t kGroupID = 2; |
| constexpr size_t kWritebackCapacity = 8; |
| constexpr uint32_t kDeviceBlockSize = 1024; |
| constexpr uint32_t kDiskBlockRatio = kBlockSize / kDeviceBlockSize; |
| |
| // Callback for MockTransactionManager to invoke on calls to Transaction(). |request| is performed |
| // on the provided |vmo|. |
| using TransactionCallback = |
| fbl::Function<zx_status_t(const block_fifo_request_t& request, const zx::vmo& vmo)>; |
| |
| using block_client::BlockDevice; |
| |
| // A simplified TransactionManager to be used when unit testing structures which require one (e.g. |
| // WritebackQueue, Journal). Allows vmos to be attached/detached and a customized callback to be |
| // invoked on transaction completion. |
| // This class is thread-safe. |
| class MockTransactionManager : public TransactionManager { |
| public: |
| MockTransactionManager() = default; |
| ~MockTransactionManager() = default; |
| |
| // Sets the |callback| to be invoked for each request on calls to Transaction(). |
| void SetTransactionCallback(TransactionCallback callback) { |
| fbl::AutoLock lock(&lock_); |
| transaction_callback_ = std::move(callback); |
| } |
| |
| uint32_t FsBlockSize() const final { return kBlockSize; } |
| |
| uint32_t DeviceBlockSize() const final { return kBlockSize; } |
| |
| uint64_t BlockNumberToDevice(uint64_t block_num) const final { return block_num; } |
| |
| block_client::BlockDevice* GetDevice() final { return nullptr; } |
| |
| zx_status_t RunOperation(const storage::Operation& operation, |
| storage::BlockBuffer* buffer) final { |
| return ZX_OK; |
| } |
| |
| zx_status_t Transaction(block_fifo_request_t* requests, size_t count) override; |
| |
| const Superblock& Info() const final { return superblock_; } |
| |
| Superblock& MutableInfo() { return superblock_; } |
| |
| zx_status_t AddInodes(Allocator*) final { return ZX_ERR_NOT_SUPPORTED; } |
| |
| zx_status_t AddBlocks(size_t nblocks, RawBitmap* map) final { return ZX_ERR_NOT_SUPPORTED; } |
| |
| zx_status_t BlockAttachVmo(const zx::vmo& vmo, storage::Vmoid* out) final; |
| |
| zx_status_t BlockDetachVmo(storage::Vmoid vmoid) final; |
| |
| BlobfsMetrics* Metrics() final { return &metrics_; } |
| |
| size_t WritebackCapacity() const final { return kWritebackCapacity; } |
| |
| fs::Journal* journal() final { |
| ZX_ASSERT(false); |
| return nullptr; |
| } |
| |
| private: |
| BlobfsMetrics metrics_{}; |
| Superblock superblock_{}; |
| fbl::Vector<std::optional<zx::vmo>> attached_vmos_ __TA_GUARDED(lock_); |
| TransactionCallback transaction_callback_ __TA_GUARDED(lock_); |
| fbl::Mutex lock_; |
| }; |
| |
| // A trivial space manager, incapable of resizing. |
| class MockSpaceManager : public SpaceManager { |
| public: |
| Superblock& MutableInfo() { return superblock_; } |
| |
| const Superblock& Info() const final { return superblock_; } |
| zx_status_t AddInodes(Allocator*) final { return ZX_ERR_NOT_SUPPORTED; } |
| zx_status_t AddBlocks(size_t nblocks, RawBitmap* map) final { return ZX_ERR_NOT_SUPPORTED; } |
| zx_status_t BlockAttachVmo(const zx::vmo& vmo, storage::Vmoid* out) final { return ZX_ERR_NOT_SUPPORTED; } |
| zx_status_t BlockDetachVmo(storage::Vmoid vmoid) final { return ZX_ERR_NOT_SUPPORTED; } |
| |
| private: |
| Superblock superblock_{}; |
| }; |
| |
| // Create a block and node map of the requested size, update the superblock of |
| // the |space_manager|, and create an allocator from this provided info. |
| void InitializeAllocator(size_t blocks, size_t nodes, MockSpaceManager* space_manager, |
| std::unique_ptr<Allocator>* out); |
| |
| // Force the allocator to become maximally fragmented by allocating |
| // every-other block within up to |blocks|. |
| void ForceFragmentation(Allocator* allocator, size_t blocks); |
| |
| // Save the extents within |in| in a non-reserved vector |out|. |
| void CopyExtents(const fbl::Vector<ReservedExtent>& in, fbl::Vector<Extent>* out); |
| |
| // Save the nodes within |in| in a non-reserved vector |out|. |
| void CopyNodes(const fbl::Vector<ReservedNode>& in, fbl::Vector<uint32_t>* out); |
| |
| // Reads |size| bytes from the |device| at byte offset |dev_offset| into |buf|. |
| // Expects |size| and |dev_offset| to be multiple of |device| block size. |
| void DeviceBlockRead(BlockDevice* device, void* buf, size_t size, uint64_t dev_offset); |
| |
| // Writes |size| bytes from the |buf| to the |device| at offset |dev_offset|. |
| // Expects |size| and |dev_offset| to be multiple of |device| block size. |
| void DeviceBlockWrite(BlockDevice* device, const void* buf, size_t size, uint64_t dev_offset); |
| |
| } // namespace blobfs |
| |
| #endif // ZIRCON_SYSTEM_ULIB_BLOBFS_TEST_UNIT_UTILS_H_ |