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chunk_store: fix problem with permission checking

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Permissions are stored in the lower 9 bits (rwxrwxrwx),
so we have to mask `st_mode` with 0o777.
The datastore root dir is created with 755, the `.chunks` dir and its
contents with 750 and the `.lock` file with 644, this changes the
expected permissions accordingly.

Signed-off-by: Hannes Laimer <h.laimer@proxmox.com>
Fixes: 6e101ff757 ("fix #5439: allow to reuse existing datastore")
Reviewed-By: Gabriel Goller <g.goller@proxmox.com>
This commit is contained in:
Hannes Laimer 2024-11-13 13:40:47 +01:00 committed by Fabian Grünbichler
parent ec4ffa924a
commit cd933e9d69
1 changed files with 5 additions and 5 deletions
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10
pbs-datastore/src/chunk_store.rs
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@ -576,7 +576,7 @@ impl ChunkStore {
Ok(stat) => {
if stat.st_uid != u32::from(pbs_config::backup_user()?.uid)
|| stat.st_gid != u32::from(pbs_config::backup_group()?.gid)
|| stat.st_mode != file_mode
|| stat.st_mode & 0o777 != file_mode
{
bail!(
"unable to open existing chunk store path {:?} - permissions or owner not correct",
@ -598,22 +598,22 @@ impl ChunkStore {
/// subdirectories and the lock file.
pub fn verify_chunkstore<T: AsRef<Path>>(path: T) -> Result<(), Error> {
// Check datastore root path perm/owner
ChunkStore::check_permissions(path.as_ref(), 0o700)?;
ChunkStore::check_permissions(path.as_ref(), 0o755)?;
let chunk_dir = Self::chunk_dir(path.as_ref());
// Check datastore .chunks path perm/owner
ChunkStore::check_permissions(&chunk_dir, 0o700)?;
ChunkStore::check_permissions(&chunk_dir, 0o750)?;
// Check all .chunks subdirectories
for i in 0..64 * 1024 {
let mut l1path = chunk_dir.clone();
l1path.push(format!("{:04x}", i));
ChunkStore::check_permissions(&l1path, 0o700)?;
ChunkStore::check_permissions(&l1path, 0o750)?;
}
// Check .lock file
let lockfile_path = Self::lockfile_path(path.as_ref());
ChunkStore::check_permissions(lockfile_path, 0o600)?;
ChunkStore::check_permissions(lockfile_path, 0o644)?;
Ok(())
}
}