Struct sys_mount::MountFlags

pub struct MountFlags { /* private fields */ }

Flags which may be specified when mounting a file system.

Implementations

impl MountFlags

pub const BIND: Self = _

Perform a bind mount, making a file or a directory subtree visible at another point within a file system. Bind mounts may cross file system boundaries and span chroot(2) jails. The filesystemtype and data arguments are ignored. Up until Linux 2.6.26, mountflags was also ignored (the bind mount has the same mount options as the underlying mount point).

pub const DIRSYNC: Self = _

Make directory changes on this file system synchronous.(This property can be obtained for individual directories or subtrees using chattr(1).)

pub const MANDLOCK: Self = _

Permit mandatory locking on files in this file system. (Mandatory locking must still be enabled on a per-file basis, as described in fcntl(2).)

pub const MOVE: Self = _

Move a subtree. source specifies an existing mount point and target specifies the new location. The move is atomic: at no point is the subtree unmounted. The filesystemtype, mountflags, and data arguments are ignored.

pub const NOATIME: Self = _

Do not update access times for (all types of) files on this file system.

pub const NODEV: Self = _

Do not allow access to devices (special files) on this file system.

pub const NODIRATIME: Self = _

Do not update access times for directories on this file system. This flag provides a subset of the functionality provided by MS_NOATIME; that is, MS_NOATIME implies MS_NODIRATIME.

pub const NOEXEC: Self = _

Do not allow programs to be executed from this file system.

pub const NOSUID: Self = _

Do not honor set-user-ID and set-group-ID bits when executing programs from this file system.

pub const RDONLY: Self = _

Mount file system read-only.

pub const RELATIME: Self = _

When a file on this file system is accessed, only update the file’s last access time (atime) if the current value of atime is less than or equal to the file’s last modification time (mtime) or last status change time (ctime). This option is useful for programs, such as mutt(1), that need to know when a file has been read since it was last modified. Since Linux 2.6.30, the kernel defaults to the behavior provided by this flag (unless MS_NOATIME was specified), and the MS_STRICTATIME flag is required to obtain traditional semantics. In addition, since Linux 2.6.30, the file’s last access time is always updated if it is more than 1 day old.

pub const REMOUNT: Self = _

Remount an existing mount. This allows you to change the mountflags and data of an existing mount without having to unmount and remount the file system. target should be the same value specified in the initial mount() call; source and filesystemtype are ignored.

The following mountflags can be changed: MS_RDONLY, MS_SYNCHRONOUS, MS_MANDLOCK; before kernel 2.6.16, the following could also be changed: MS_NOATIME and MS_NODIRATIME; and, additionally, before kernel 2.4.10, the following could also be changed: MS_NOSUID, MS_NODEV, MS_NOEXEC.

pub const SILENT: Self = _

Suppress the display of certain (printk()) warning messages in the kernel log. This flag supersedes the misnamed and obsolete MS_VERBOSE flag (available since Linux 2.4.12), which has the same meaning.

pub const STRICTATIME: Self = _

Always update the last access time (atime) when files on this file system are accessed. (This was the default behavior before Linux 2.6.30.) Specifying this flag overrides the effect of setting the MS_NOATIME and MS_RELATIME flags.

pub const SYNCHRONOUS: Self = _

Make writes on this file system synchronous (as though the O_SYNC flag to open(2) was specified for all file opens to this file system).

pub const fn empty() -> Self

Returns an empty set of flags.

pub const fn all() -> Self

Returns the set containing all flags.

pub const fn bits(&self) -> c_ulong

Returns the raw value of the flags currently stored.

pub const fn from_bits(bits: c_ulong) -> Option<Self>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

pub const fn from_bits_truncate(bits: c_ulong) -> Self

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

pub const unsafe fn from_bits_unchecked(bits: c_ulong) -> Self

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

Safety

The caller of the bitflags! macro can chose to allow or disallow extra bits for their bitflags type.

The caller of from_bits_unchecked() has to ensure that all bits correspond to a defined flag or that extra bits are valid for this bitflags type.

pub const fn is_empty(&self) -> bool

Returns true if no flags are currently stored.

pub const fn is_all(&self) -> bool

Returns true if all flags are currently set.

pub const fn intersects(&self, other: Self) -> bool

Returns true if there are flags common to both self and other.

pub const fn contains(&self, other: Self) -> bool

Returns true if all of the flags in other are contained within self.

pub fn insert(&mut self, other: Self)

Inserts the specified flags in-place.

pub fn remove(&mut self, other: Self)

Removes the specified flags in-place.

pub fn toggle(&mut self, other: Self)

Toggles the specified flags in-place.

pub fn set(&mut self, other: Self, value: bool)

Inserts or removes the specified flags depending on the passed value.

pub const fn intersection(self, other: Self) -> Self

Returns the intersection between the flags in self and other.

Specifically, the returned set contains only the flags which are present in both self and other.

This is equivalent to using the & operator (e.g. ops::BitAnd), as in flags & other.

pub const fn union(self, other: Self) -> Self

Returns the union of between the flags in self and other.

Specifically, the returned set contains all flags which are present in either self or other, including any which are present in both (see Self::symmetric_difference if that is undesirable).

This is equivalent to using the | operator (e.g. ops::BitOr), as in flags | other.

pub const fn difference(self, other: Self) -> Self

Returns the difference between the flags in self and other.

Specifically, the returned set contains all flags present in self, except for the ones present in other.

It is also conceptually equivalent to the “bit-clear” operation: flags & !other (and this syntax is also supported).

This is equivalent to using the - operator (e.g. ops::Sub), as in flags - other.

pub const fn symmetric_difference(self, other: Self) -> Self

Returns the symmetric difference between the flags in self and other.

Specifically, the returned set contains the flags present which are present in self or other, but that are not present in both. Equivalently, it contains the flags present in exactly one of the sets self and other.

This is equivalent to using the ^ operator (e.g. ops::BitXor), as in flags ^ other.

pub const fn complement(self) -> Self

Returns the complement of this set of flags.

Specifically, the returned set contains all the flags which are not set in self, but which are allowed for this type.

Alternatively, it can be thought of as the set difference between Self::all() and self (e.g. Self::all() - self)

This is equivalent to using the ! operator (e.g. ops::Not), as in !flags.

Trait Implementations

impl Binary for MountFlags

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

Formats the value using the given formatter.

impl BitAnd<MountFlags> for MountFlags

fn bitand(self, other: Self) -> Self

Returns the intersection between the two sets of flags.

type Output = MountFlags

The resulting type after applying the & operator.

impl BitAndAssign<MountFlags> for MountFlags

fn bitand_assign(&mut self, other: Self)

Disables all flags disabled in the set.

impl BitOr<MountFlags> for MountFlags

fn bitor(self, other: MountFlags) -> Self

Returns the union of the two sets of flags.

type Output = MountFlags

The resulting type after applying the | operator.

impl BitOrAssign<MountFlags> for MountFlags

fn bitor_assign(&mut self, other: Self)

Adds the set of flags.

impl BitXor<MountFlags> for MountFlags

fn bitxor(self, other: Self) -> Self

Returns the left flags, but with all the right flags toggled.

type Output = MountFlags

The resulting type after applying the ^ operator.

impl BitXorAssign<MountFlags> for MountFlags

fn bitxor_assign(&mut self, other: Self)

Toggles the set of flags.

impl Clone for MountFlags

fn clone(&self) -> MountFlags

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MountFlags

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

Formats the value using the given formatter.

impl Extend<MountFlags> for MountFlags

fn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)

Extends a collection with the contents of an iterator.

fn extend_one(&mut self, item: A)

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

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

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

Reserves capacity in a collection for the given number of additional elements.

impl FromIterator<MountFlags> for MountFlags

fn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self

Creates a value from an iterator.

impl Hash for MountFlags

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,
    Self: Sized,

Feeds a slice of this type into the given Hasher.

impl LowerHex for MountFlags

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

Formats the value using the given formatter.

impl Not for MountFlags

fn not(self) -> Self

Returns the complement of this set of flags.

type Output = MountFlags

The resulting type after applying the ! operator.

impl Octal for MountFlags

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

Formats the value using the given formatter.

impl Ord for MountFlags

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

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere
    Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl PartialEq<MountFlags> for MountFlags

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

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

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<MountFlags> for MountFlags

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

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

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

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

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

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

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

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

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

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

impl Sub<MountFlags> for MountFlags

fn sub(self, other: Self) -> Self

Returns the set difference of the two sets of flags.

type Output = MountFlags

The resulting type after applying the - operator.

impl SubAssign<MountFlags> for MountFlags

fn sub_assign(&mut self, other: Self)

Disables all flags enabled in the set.

impl UpperHex for MountFlags

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

Formats the value using the given formatter.

impl Copy for MountFlags

impl Eq for MountFlags

impl StructuralEq for MountFlags

impl StructuralPartialEq for MountFlags