Struct sysfs_class::Block

pub struct Block { /* fields omitted */ }

A block device in /sys/class/block

Methods

impl Block

pub fn has_device(&self) -> bool

pub fn children(&self) -> Result<Vec<Self>>

pub fn parent_device(&self) -> Option<Block>

pub fn slaves(
    &self
) -> Option<Result<Box<dyn Iterator<Item = Result<PathBuf>>>>>

Logical devices have their parent device(s) listed here.

For example:

• dm-4 has a slave of dm-0
• dm-0 has a slave of sda3
• sda3 does not have any slaves

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

pub fn capability(&self) -> Result<u8>

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

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

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

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

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

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

pub fn hidden(&self) -> Result<u8>

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

pub fn partition(&self) -> Result<u8>

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

pub fn removable(&self) -> Result<u8>

pub fn ro(&self) -> Result<u8>

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

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

pub fn stat(&self) -> Result<u8>

pub fn subsystem(&self) -> Result<u8>

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

pub fn device_blocked(&self) -> Result<u8>

pub fn device_busy(&self) -> Result<u8>

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pub fn queue_rotational(&self) -> Result<u8>

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

pub fn queue_scheduler(&self) -> Result<BlockScheduler>

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

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

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

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

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

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

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

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

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

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

pub fn queue_iosched_low_latency(&self) -> Result<u8>

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

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

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

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

pub fn queue_iosched_slice_idle(&self) -> Result<u8>

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

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

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

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

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

Trait Implementations

impl Clone for Block

fn clone(&self) -> Block

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Block

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Eq for Block

impl Hash for Block

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl Ord for Block

fn cmp(&self, other: &Block) -> Ordering

This method returns an [Ordering] between self and other.

#[must_use]fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl PartialEq<Block> for Block

fn eq(&self, other: &Block) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Block) -> bool

This method tests for !=.

impl PartialOrd<Block> for Block

fn partial_cmp(&self, other: &Block) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Block) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Block) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Block) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Block) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralEq for Block

impl StructuralPartialEq for Block

impl SysClass for Block

fn class() -> &'static str

Return the class of the sys object, the name of a folder in `/sys/${base}``

unsafe fn from_path_unchecked(path: PathBuf) -> Self

Create a sys object from an absolute path without checking path for validity

fn path(&self) -> &Path

Return the path of the sys object

fn base() -> &'static str

Sets the base directory, which defaults to class.

fn dir() -> PathBuf

Return the path to the sys objects, the full path of a folder in /sys/class

fn from_path(path: &Path) -> Result<Self>

Create a sys object from a path, checking it for validity

fn all() -> Result<Vec<Self>>

Retrieve all of the object instances of a sys class

fn iter() -> Box<dyn Iterator<Item = Result<Self>>> where
    Self: 'static, 

Retrieve all of the object instances of a sys class, with a boxed iterator

fn new(id: &str) -> Result<Self>

Create a sys object by id, checking it for validity

fn id(&self) -> &str

Return the id of the sys object

fn read_file<P: AsRef<Path>>(&self, name: P) -> Result<String>

Read a file underneath the sys object

fn parse_file<F: FromStr, P: AsRef<Path>>(&self, name: P) -> Result<F> where
    F::Err: Display, 

Parse a number from a file underneath the sys object

fn trim_file<P: AsRef<Path>>(&self, name: P) -> Result<String>

Read a file underneath the sys object and trim whitespace

fn write_file<P: AsRef<Path>, S: AsRef<[u8]>>(
    &self,
    name: P,
    data: S
) -> Result<()>

Write a file underneath the sys object