| // 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. |
| |
| #pragma once |
| |
| #ifndef __Fuchsia__ |
| #error Fuchsia-only Header |
| #endif |
| |
| #include <lib/zx/vmo.h> |
| #include <zircon/device/block.h> |
| |
| namespace blobfs { |
| |
| enum class OperationType { |
| kRead, |
| kWrite, |
| kTrim, // Unimplemented. |
| }; |
| |
| // A mapping of an in-memory buffer to an on-disk location. |
| // |
| // All units are in Blobfs blocks. |
| struct Operation { |
| OperationType type; |
| uint64_t vmo_offset = 0; |
| uint64_t dev_offset = 0; |
| uint64_t length = 0; |
| }; |
| |
| // An operation paired with a source vmo. |
| // |
| // Used to indicate a request to move in-memory data to an on-disk location, |
| // or vice versa. To be transmitted to storage, the |vmo| must be later |
| // converted to a "vmoid_t" object. |
| struct UnbufferedOperation { |
| zx::unowned_vmo vmo; |
| Operation op; |
| }; |
| |
| // An operation paired with a source vmoid. |
| // |
| // This vmoid is a token that represents a buffer that is attached to the |
| // underlying storage device. |
| struct BufferedOperation { |
| vmoid_t vmoid; |
| Operation op; |
| }; |
| |
| } // namespace blobfs |