Struct SysfsBtrfs 

pub struct SysfsBtrfs { /* private fields */ }

Provides typed access to the sysfs files exposed for a single mounted btrfs filesystem under /sys/fs/btrfs/<uuid>/.

Implementations

impl SysfsBtrfs

pub fn new(uuid: &Uuid) -> Self

Create a new SysfsBtrfs for the filesystem with the given UUID.

pub fn bg_reclaim_threshold(&self) -> Result<u64>

Background reclaim threshold as a percentage (0–100). /sys/fs/btrfs/<uuid>/bg_reclaim_threshold

pub fn checksum(&self) -> Result<String>

Checksum algorithm in use, e.g. "crc32c (crc32c-lib)". /sys/fs/btrfs/<uuid>/checksum

pub fn clone_alignment(&self) -> Result<u64>

Minimum clone/reflink alignment in bytes. /sys/fs/btrfs/<uuid>/clone_alignment

pub fn commit_stats(&self) -> Result<CommitStats>

Commit statistics since mount (or last reset). /sys/fs/btrfs/<uuid>/commit_stats

pub fn reset_commit_stats(&self) -> Result<()>

Reset the max_commit_ms counter by writing 0 to the commit_stats file. Requires root. /sys/fs/btrfs/<uuid>/commit_stats

pub fn exclusive_operation(&self) -> Result<String>

Name of the exclusive operation currently running, e.g. "none", "balance", "device add". /sys/fs/btrfs/<uuid>/exclusive_operation

pub fn features(&self) -> Result<Vec<String>>

Names of the filesystem features that are enabled. Each feature corresponds to a file in the features/ subdirectory. /sys/fs/btrfs/<uuid>/features/

pub fn generation(&self) -> Result<u64>

Current filesystem generation number. /sys/fs/btrfs/<uuid>/generation

pub fn label(&self) -> Result<String>

Filesystem label. Empty string if no label is set. /sys/fs/btrfs/<uuid>/label

pub fn metadata_uuid(&self) -> Result<Uuid>

Metadata UUID. May differ from the filesystem UUID if the metadata UUID feature is in use. /sys/fs/btrfs/<uuid>/metadata_uuid

pub fn nodesize(&self) -> Result<u64>

B-tree node size in bytes. /sys/fs/btrfs/<uuid>/nodesize

pub fn quota_override(&self) -> Result<bool>

Whether the quota override is active. /sys/fs/btrfs/<uuid>/quota_override

pub fn read_policy(&self) -> Result<String>

Read policy for RAID profiles, e.g. "[pid]" or "[roundrobin]". /sys/fs/btrfs/<uuid>/read_policy

pub fn sectorsize(&self) -> Result<u64>

Sector size in bytes. /sys/fs/btrfs/<uuid>/sectorsize

pub fn temp_fsid(&self) -> Result<bool>

Whether a temporary fsid is in use (seeding device feature). /sys/fs/btrfs/<uuid>/temp_fsid

pub fn scrub_speed_max_get(&self, devid: u64) -> Result<u64>

Read the per-device scrub throughput limit for the given device, in bytes per second. A value of 0 means no limit is set (unlimited). /sys/fs/btrfs/<uuid>/devinfo/<devid>/scrub_speed_max

pub fn scrub_speed_max_set(&self, devid: u64, limit: u64) -> Result<()>

Set the per-device scrub throughput limit for the given device, in bytes per second. Pass 0 to remove the limit (unlimited). Requires root. /sys/fs/btrfs/<uuid>/devinfo/<devid>/scrub_speed_max

pub fn quota_status(&self) -> Result<QuotaStatus>

Quota status for this filesystem, read from /sys/fs/btrfs/<uuid>/qgroups/.

Returns Ok(QuotaStatus { enabled: false, .. }) when quota is not enabled (the qgroups/ directory does not exist). Returns an io::Error with kind NotFound if the sysfs entry for this UUID does not exist (i.e. the filesystem is not currently mounted).