Module quota 

Filesystem quota: enabling, disabling, and rescanning quota accounting

Quota accounting tracks disk usage per subvolume via qgroups. It must be explicitly enabled before any qgroup limits or usage data are available. Once enabled, usage numbers are maintained incrementally by the kernel; a rescan rebuilds them from scratch if they become inconsistent.

Quota status (whether quotas are on, which mode, inconsistency flag) is read from sysfs via crate::sysfs::SysfsBtrfs::quota_status.

Structs

QuotaRescanStatus

Status of an in-progress (or absent) quota rescan.

Functions

quota_disable

Disable quota accounting on the filesystem referred to by fd.

quota_enable

Enable quota accounting on the filesystem referred to by fd.

quota_rescan

Start a quota rescan on the filesystem referred to by fd.

quota_rescan_status

Query the status of the quota rescan on the filesystem referred to by fd.

quota_rescan_wait

Block until the quota rescan currently running on the filesystem referred to by fd completes. Returns immediately if no rescan is in progress.