virtio::blk::VirtioBlkVfsAdapter Class Reference

Adapts VirtioBlk<> to vfs::BlockDevice. More...

#include <virtio_blk_vfs_adapter.hpp>

Inheritance diagram for virtio::blk::VirtioBlkVfsAdapter:

Collaboration diagram for virtio::blk::VirtioBlkVfsAdapter:

Public Types
using	VirtioBlkType = VirtioBlk<>

Public Member Functions
auto	ReadSectors (uint64_t lba, uint32_t count, void *buf) -> Expected< size_t > override
	读取连续扇区
auto	WriteSectors (uint64_t lba, uint32_t count, const void *buf) -> Expected< size_t > override
	写入连续扇区
auto	GetSectorSize () const -> uint32_t override
	获取扇区大小（通常为 512 字节）
auto	GetSectorCount () const -> uint64_t override
	获取设备总扇区数
auto	GetName () const -> const char *override
	获取设备名称（如 "virtio-blk0"）
构造/析构函数
	VirtioBlkVfsAdapter (VirtioBlkType *_dev, uint32_t _index=0)
	构造函数
	VirtioBlkVfsAdapter ()=delete
	VirtioBlkVfsAdapter (const VirtioBlkVfsAdapter &)=delete
	VirtioBlkVfsAdapter (VirtioBlkVfsAdapter &&)=delete
auto	operator= (const VirtioBlkVfsAdapter &) -> VirtioBlkVfsAdapter &=delete
auto	operator= (VirtioBlkVfsAdapter &&) -> VirtioBlkVfsAdapter &=delete
	~VirtioBlkVfsAdapter () override=default
Public Member Functions inherited from vfs::BlockDevice
virtual	~BlockDevice ()=default
virtual auto	Flush () -> Expected< void >
	刷新设备缓存到物理介质

Private Attributes
VirtioBlkType *	dev_ {nullptr}
uint32_t	index_ {0}

Static Private Attributes
static constexpr uint32_t	kSectorSize = 512

Detailed Description

Adapts VirtioBlk<> to vfs::BlockDevice.

Wraps a VirtioBlk instance and forwards ReadSectors/WriteSectors to the underlying VirtIO block device.

Definition at line 21 of file virtio_blk_vfs_adapter.hpp.

Member Typedef Documentation

VirtioBlkType

using virtio::blk::VirtioBlkVfsAdapter::VirtioBlkType = VirtioBlk<>

Definition at line 23 of file virtio_blk_vfs_adapter.hpp.

Constructor & Destructor Documentation

VirtioBlkVfsAdapter() [1/4]

virtio::blk::VirtioBlkVfsAdapter::VirtioBlkVfsAdapter ( VirtioBlkType *  _dev, uint32_t  _index = 0  )

inlineexplicit

构造函数

Parameters

_dev	VirtIO 块设备实例
_index	设备索引

Definition at line 32 of file virtio_blk_vfs_adapter.hpp.

      : dev_(_dev), index_(_index) {}

VirtioBlkVfsAdapter() [2/4]

virtio::blk::VirtioBlkVfsAdapter::VirtioBlkVfsAdapter ( )

delete

VirtioBlkVfsAdapter() [3/4]

virtio::blk::VirtioBlkVfsAdapter::VirtioBlkVfsAdapter ( const VirtioBlkVfsAdapter &  )

delete

VirtioBlkVfsAdapter() [4/4]

virtio::blk::VirtioBlkVfsAdapter::VirtioBlkVfsAdapter ( VirtioBlkVfsAdapter &&  )

delete

~VirtioBlkVfsAdapter()

virtio::blk::VirtioBlkVfsAdapter::~VirtioBlkVfsAdapter ( )

overridedefault

Member Function Documentation

GetName()

auto virtio::blk::VirtioBlkVfsAdapter::GetName ( ) const -> const char *override

inlineoverridevirtual

获取设备名称（如 "virtio-blk0"）

Returns

设备名称

Implements vfs::BlockDevice.

Definition at line 74 of file virtio_blk_vfs_adapter.hpp.

                                                             {
    static constexpr std::array<const char*, 4> kNames = {
        "virtio-blk0", "virtio-blk1", "virtio-blk2", "virtio-blk3"};
    return (index_ < kNames.size()) ? kNames[index_] : "virtio-blk?";
  }

GetSectorCount()

auto virtio::blk::VirtioBlkVfsAdapter::GetSectorCount ( ) const -> uint64_t

inlineoverridevirtual

获取设备总扇区数

Returns

总扇区数

Implements vfs::BlockDevice.

Definition at line 70 of file virtio_blk_vfs_adapter.hpp.

                                                                 {
    return dev_->GetCapacity();
  }

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GetSectorSize()

auto virtio::blk::VirtioBlkVfsAdapter::GetSectorSize ( ) const -> uint32_t

inlineoverridevirtual

获取扇区大小（通常为 512 字节）

Returns

扇区大小（字节）

Implements vfs::BlockDevice.

Definition at line 66 of file virtio_blk_vfs_adapter.hpp.

                                                                {
    return kSectorSize;
  }

operator=() [1/2]

auto virtio::blk::VirtioBlkVfsAdapter::operator= ( const VirtioBlkVfsAdapter &  ) -> VirtioBlkVfsAdapter &=delete

delete

operator=() [2/2]

auto virtio::blk::VirtioBlkVfsAdapter::operator= ( VirtioBlkVfsAdapter &&  ) -> VirtioBlkVfsAdapter &=delete

delete

ReadSectors()

auto virtio::blk::VirtioBlkVfsAdapter::ReadSectors ( uint64_t  sector_start, uint32_t  sector_count, void *  buffer  ) -> Expected< size_t >

inlineoverridevirtual

读取连续扇区

Parameters

sector_start	起始扇区号（LBA）
sector_count	扇区数量
buffer	输出缓冲区，大小至少为 sector_count * GetSectorSize()

Returns

Expected<size_t> 成功时返回实际读取的字节数

Precondition

buffer != nullptr

sector_start + sector_count <= GetSectorCount()

Postcondition

返回值 == sector_count * GetSectorSize() 或错误

Implements vfs::BlockDevice.

Definition at line 42 of file virtio_blk_vfs_adapter.hpp.

                                   {
    auto* ptr = static_cast<uint8_t*>(buf);
    for (uint32_t i = 0; i < count; ++i) {
      auto result = dev_->Read(lba + i, ptr + i * kSectorSize);
      if (!result) {
        return std::unexpected(Error(result.error().code));
      }
    }
    return static_cast<size_t>(count) * kSectorSize;
  }

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WriteSectors()

auto virtio::blk::VirtioBlkVfsAdapter::WriteSectors ( uint64_t  sector_start, uint32_t  sector_count, const void *  buffer  ) -> Expected< size_t >

inlineoverridevirtual

写入连续扇区

Parameters

sector_start	起始扇区号（LBA）
sector_count	扇区数量
buffer	输入缓冲区

Returns

Expected<size_t> 成功时返回实际写入的字节数

Precondition

buffer != nullptr

sector_start + sector_count <= GetSectorCount()

Implements vfs::BlockDevice.

Definition at line 54 of file virtio_blk_vfs_adapter.hpp.

                                   {
    const auto* ptr = static_cast<const uint8_t*>(buf);
    for (uint32_t i = 0; i < count; ++i) {
      auto result = dev_->Write(lba + i, ptr + i * kSectorSize);
      if (!result) {
        return std::unexpected(Error(result.error().code));
      }
    }
    return static_cast<size_t>(count) * kSectorSize;
  }

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Member Data Documentation

dev_

VirtioBlkType* virtio::blk::VirtioBlkVfsAdapter::dev_ {nullptr}

private

Definition at line 82 of file virtio_blk_vfs_adapter.hpp.

{nullptr};

index_

uint32_t virtio::blk::VirtioBlkVfsAdapter::index_ {0}

private

Definition at line 83 of file virtio_blk_vfs_adapter.hpp.

{0};

kSectorSize

constexpr uint32_t virtio::blk::VirtioBlkVfsAdapter::kSectorSize = 512

staticconstexprprivate

Definition at line 81 of file virtio_blk_vfs_adapter.hpp.

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The documentation for this class was generated from the following file:

• /workspaces/SimpleKernel/src/device/virtio/device/blk/virtio_blk_vfs_adapter.hpp