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Implement AsRawFd and IntoRawFd for LoopControl and LoopDevice. Add metadata #30

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Merged
mdaffin merged 2 commits into from
May 31, 2021
Merged

Implement AsRawFd and IntoRawFd for LoopControl and LoopDevice. Add metadata #30

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28f3130
Implement `AsRawFd` and `IntoRawFd` for LoopControl and LoopDevice
May 27, 2021
546d634
Add `metadata` for a `LoopDevice`
May 27, 2021
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25 changes: 24 additions & 1 deletion src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -22,9 +22,9 @@ use bindings::{
loop_info64, LOOP_CLR_FD, LOOP_CTL_GET_FREE, LOOP_SET_CAPACITY, LOOP_SET_FD, LOOP_SET_STATUS64,
};
use libc::{c_int, ioctl};
use std::fs::{File, OpenOptions};
use std::{
default::Default,
fs::{File, Metadata, OpenOptions},
io,
os::unix::prelude::*,
path::{Path, PathBuf},
Expand Down Expand Up @@ -86,6 +86,18 @@ impl LoopControl {
}
}

impl AsRawFd for LoopControl {
fn as_raw_fd(&self) -> RawFd {
self.dev_file.as_raw_fd()
}
}

impl IntoRawFd for LoopControl {
fn into_raw_fd(self) -> RawFd {
self.dev_file.into_raw_fd()
}
}

/// Interface to a loop device ie `/dev/loop0`.
#[derive(Debug)]
pub struct LoopDevice {
Expand All @@ -98,6 +110,12 @@ impl AsRawFd for LoopDevice {
}
}

impl IntoRawFd for LoopDevice {
fn into_raw_fd(self) -> RawFd {
self.device.into_raw_fd()
}
}

impl LoopDevice {
/// Opens a loop device.
pub fn open<P: AsRef<Path>>(dev: P) -> io::Result<Self> {
Expand Down Expand Up @@ -245,6 +263,11 @@ impl LoopDevice {
std::fs::read_link(&p).ok()
}

/// Get the device metadata
pub fn metadata(&self) -> io::Result<Metadata> {
self.device.metadata()
}

/// Detach a loop device from its backing file.
///
/// Note that the device won't fully detach until a short delay after the underling device file
Expand Down