virtio::blk::BlkReqHeader Struct Reference

块设备请求头 More...

#include <virtio_blk_defs.h>

Collaboration diagram for virtio::blk::BlkReqHeader:

Public Attributes
uint32_t	type
	请求类型 (ReqType)
uint32_t	reserved
	保留字段，必须为 0
uint64_t	sector
	起始扇区号（仅对读/写请求有效，其他类型应设为 0）

Detailed Description

块设备请求头

See also

virtio-v1.2#5.2.6 Device Operation

所有块设备请求都以此结构开头，位于第一个描述符中（设备只读）。

Note

协议中所有字段采用小端格式

请求头后跟数据缓冲区（可选），最后是状态字节（设备只写）

Definition at line 209 of file virtio_blk_defs.h.

Member Data Documentation

reserved

uint32_t virtio::blk::BlkReqHeader::reserved

保留字段，必须为 0

Definition at line 213 of file virtio_blk_defs.h.

sector

uint64_t virtio::blk::BlkReqHeader::sector

起始扇区号（仅对读/写请求有效，其他类型应设为 0）

Definition at line 215 of file virtio_blk_defs.h.

type

uint32_t virtio::blk::BlkReqHeader::type

请求类型 (ReqType)

Definition at line 211 of file virtio_blk_defs.h.

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

• /workspaces/SimpleKernel/src/device/virtio/device/blk/virtio_blk_defs.h