Struct ext4_blockdev_iface 

#[repr(C)]
pub struct ext4_blockdev_iface {

    pub open: Option<unsafe extern "C" fn(bdev: *mut ext4_blockdev) -> c_int>,
    pub bread: Option<unsafe extern "C" fn(bdev: *mut ext4_blockdev, buf: *mut c_void, blk_id: u64, blk_cnt: u32) -> c_int>,
    pub bwrite: Option<unsafe extern "C" fn(bdev: *mut ext4_blockdev, buf: *const c_void, blk_id: u64, blk_cnt: u32) -> c_int>,
    pub close: Option<unsafe extern "C" fn(bdev: *mut ext4_blockdev) -> c_int>,
    pub lock: Option<unsafe extern "C" fn(bdev: *mut ext4_blockdev) -> c_int>,
    pub unlock: Option<unsafe extern "C" fn(bdev: *mut ext4_blockdev) -> c_int>,
    pub ph_bsize: u32,
    pub ph_bcnt: u64,
    pub ph_bbuf: *mut u8,
    pub ph_refctr: u32,
    pub bread_ctr: u32,
    pub bwrite_ctr: u32,
    pub p_user: *mut c_void,
}

Block device interface with callbacks

Fields

open: Option<unsafe extern "C" fn(bdev: *mut ext4_blockdev) -> c_int>

Open device function

bread: Option<unsafe extern "C" fn(bdev: *mut ext4_blockdev, buf: *mut c_void, blk_id: u64, blk_cnt: u32) -> c_int>

Block read function

bwrite: Option<unsafe extern "C" fn(bdev: *mut ext4_blockdev, buf: *const c_void, blk_id: u64, blk_cnt: u32) -> c_int>

Block write function

close: Option<unsafe extern "C" fn(bdev: *mut ext4_blockdev) -> c_int>

Close device function

lock: Option<unsafe extern "C" fn(bdev: *mut ext4_blockdev) -> c_int>

Lock block device (optional)

unlock: Option<unsafe extern "C" fn(bdev: *mut ext4_blockdev) -> c_int>

Unlock block device (optional)

ph_bsize: u32

Physical block size (bytes)

ph_bcnt: u64

Physical block count

ph_bbuf: *mut u8

Physical block buffer

ph_refctr: u32

Reference counter

bread_ctr: u32

Physical read counter

bwrite_ctr: u32

Physical write counter

p_user: *mut c_void

User data pointer

Trait Implementations

impl Default for ext4_blockdev_iface

fn default() -> Self

Returns the “default value” for a type.