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fix #2871: close FDs when scanning backup group 

otherwise we leak those descriptors and run into EMFILE when a backup
group contains many snapshots.

fcntl::openat and Dir::openat are not the same ;)

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
This commit is contained in:
Fabian Grünbichler 2020-07-21 15:03:36 +02:00 committed by Thomas Lamprecht
parent c1c4a18f48
commit 25455bd06d
1 changed files with 5 additions and 1 deletions
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6
src/backup/backup_info.rs
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@ -106,7 +106,11 @@ impl BackupGroup {
use nix::fcntl::{openat, OFlag};
match openat(l2_fd, &manifest_path, OFlag::O_RDONLY, nix::sys::stat::Mode::empty()) {
Ok(_) => { /* manifest exists --> assume backup was successful */ },
Ok(rawfd) => {
/* manifest exists --> assume backup was successful */
/* close else this leaks! */
nix::unistd::close(rawfd)?;
},
Err(nix::Error::Sys(nix::errno::Errno::ENOENT)) => { return Ok(()); }
Err(err) => {
bail!("last_successful_backup: unexpected error - {}", err);