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block_util: Move block device detection into it's own function

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Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2021-12-17 11:11:55 +00:00 committed by Sebastien Boeuf
parent 6c8bd1f476
commit 8813456aef
1 changed files with 12 additions and 8 deletions
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20
block_util/src/async_io.rs
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@ -52,6 +52,17 @@ enum BlockSize {
}
impl DiskTopology {
fn is_block_device(f: &mut File) -> std::io::Result<bool> {
let mut stat = std::mem::MaybeUninit::<libc::stat>::uninit();
let ret = unsafe { libc::fstat(f.as_raw_fd(), stat.as_mut_ptr()) };
if ret != 0 {
return Err(std::io::Error::last_os_error());
}
let is_block = unsafe { (*stat.as_ptr()).st_mode & S_IFMT == S_IFBLK };
Ok(is_block)
}
// libc::ioctl() takes different types on different architectures
#[allow(clippy::useless_conversion)]
fn query_block_size(f: &mut File, block_size_type: BlockSize) -> std::io::Result<u64> {
@ -78,14 +89,7 @@ impl DiskTopology {
}
pub fn probe(f: &mut File) -> std::io::Result<Self> {
let mut stat = std::mem::MaybeUninit::<libc::stat>::uninit();
let ret = unsafe { libc::fstat(f.as_raw_fd(), stat.as_mut_ptr()) };
if ret != 0 {
return Err(std::io::Error::last_os_error());
}
let is_block = unsafe { (*stat.as_ptr()).st_mode & S_IFMT == S_IFBLK };
if !is_block {
if !Self::is_block_device(f)? {
return Ok(DiskTopology::default());
}