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backup: add optional progress callback to ChunkIterator 

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2019-02-12 10:35:18 +01:00
parent 4070096c6a
commit c9e7f4dc8b
1 changed files with 15 additions and 0 deletions
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15
src/backup/chunk_store.rs
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@ -65,6 +65,7 @@ pub struct ChunkIterator {
Tied<nix::dir::Dir, Iterator<Item = nix::Result<nix::dir::Entry>>>
>,
subdir_fd: RawFd,
progress: Option<fn(u8)>,
}
impl ChunkIterator {
@ -74,9 +75,16 @@ impl ChunkIterator {
index: 0,
subdir: None,
subdir_fd: 0,
progress: None,
}
}
fn with_progress(base_dir: nix::dir::Dir, progress: fn(u8)) -> Self {
let mut me = Self::new(base_dir);
me.progress = Some(progress);
me
}
fn next_subdir(&mut self) -> Result<bool, Error> {
if self.index == 0x10000 {
return Ok(false);
@ -84,6 +92,13 @@ impl ChunkIterator {
let l1name = PathBuf::from(format!("{:04x}", self.index));
self.index += 1;
if let Some(cb) = self.progress {
let prev = ((self.index-1) * 100) / 0x10000;
let now = (self.index * 100) / 0x10000;
if prev != now {
cb(now as u8);
}
}
use nix::dir::{Dir, Entry};
use nix::fcntl::OFlag;