Struct Mount
pub struct Mount { /* private fields */ }Expand description
A mount.
Implementations§
§impl Mount
impl Mount
pub fn bind<S, D>(source: S, destination: D) -> Mount
pub fn bind<S, D>(source: S, destination: D) -> Mount
Creates a bind mount. This effectively creates hardlink of a directory, making the contents accessible at both places.
By default, none of the mounts in the source directory are visible in
destination. To make all mounts recursively visible, combine this with
Mount::recursive. Can also be used with Mount::readonly to make
the contents of destination read-only.
pub fn bind_pinned<S>(source: &PinnedMountSource, destination: S) -> Mount
pub fn bind_pinned<S>(source: &PinnedMountSource, destination: S) -> Mount
Binds a held source object after checking its child-namespace identity.
Perform this ordered mount before covering the source path. The object, symlink bytes and complete mount flags must match the parent pin; missing or changed sources refuse. Unlike a pathname bind, a final symlink is installed as the link object. Target parents must not redirect through symlinks. Only recursive binding and an explicit readonly seal may be added; propagation isolation is a separate preceding operation.
Keep the source’s parent guard until reaping and retire all local source handles in the child after setup, before starting any workers. Pinned mounts refuse shared-memory or shared-descriptor clone configurations.
pub fn devpts<S>(target: S) -> Mount
pub fn devpts<S>(target: S) -> Mount
Mount a fresh devpts file system. The target is usually /dev/pts.
In order for this devpts to be private and independent of other devpts (i.e., for containers), use:
Mount::devpts("/dev/pts").data("newinstance,ptmxmode=0666")And either make /dev/ptmx a symlink pointing to /dev/pts/ptmx or
bind-mount it.
See also: https://www.kernel.org/doc/Documentation/filesystems/devpts.txt
pub fn overlay(
lowerdir: &Path,
upperdir: &Path,
workdir: &Path,
merged: &Path,
) -> Mount
pub fn overlay( lowerdir: &Path, upperdir: &Path, workdir: &Path, merged: &Path, ) -> Mount
Mount an overlay file system.
NOTE: This only works in Linux 5.11 or newer when mounted from a user namespace. Otherwise, you need real root privileges to mount an overlayfs.
An overlay filesystem combines two filesystems - an upper filesystem and a lower filesystem. When a name exists in both filesystems, the object in the upper filesystem is visible while the object in the lower filesystem is either hidden or, in the case of directories, merged with the upper object.
In other words, the lowerdir and upperdir are combined into a
directory merged using workdir as a temporary work area.
The lower filesystem can be any filesystem supported by Linux and does not need to be writable. The lower filesystem can even be another overlayfs. The upper filesystem should be writable.
See https://www.kernel.org/doc/html/latest/filesystems/overlayfs.html for more information.
§Arguments
lowerdir- The lower directory of the overlay. Can be any filesystem and does not need to be writable. This directory is never modified by writes tomerged.upperdir- The upper directory of the overlay. This is where all changes tomergedare collected. Does not need to be empty, but should be when starting a new overlay from scratch.workdir- The work directory. This should always be empty.merged- The combination oflowerdirandupperdir.
pub fn sysfs<S>(target: S) -> Mount
pub fn sysfs<S>(target: S) -> Mount
Creates a sys file system at the location specified. The target directory
is usually /sys. This is useful when creating a network namespace.
pub fn get_target(&self) -> &Path
pub fn get_target(&self) -> &Path
Returns the mount point target path.
pub fn get_source(&self) -> Option<&Path>
pub fn get_source(&self) -> Option<&Path>
Returns the mount point source path (if any).
pub fn touch_target(self) -> Mount
pub fn touch_target(self) -> Mount
Creates a missing target for a bind mount or a new tmpfs mount.
New tmpfs targets must be absolute directories with no symlink path components. Creation happens after preceding mounts, so a nested target can live in a fresh filesystem. Tmpfs remount, move, recursive and propagation operations do not create targets. Bind behavior is unchanged.
pub fn allow_readonly_fallback(self) -> Mount
pub fn allow_readonly_fallback(self) -> Mount
Allows a new writable proc mount that fails with EPERM to retry read-only.
This explicitly permits the resulting mount to be less capable than requested. It has no effect on non-proc or already-read-only mounts, remounts, bind mounts, moves, or propagation changes.
pub fn private(self) -> Mount
pub fn private(self) -> Mount
Makes this mount point private. Mount and unmount events do not propagate into or out of this mount point.
Make this mount point shared. Mount and unmount events immediately under this mount point will propagate to the other mount points that are members of this mount’s peer group. Propagation here means that the same mount or unmount will automatically occur under all of the other mount points in the peer group. Conversely, mount and unmount events that take place under peer mount points will propagate to this mount point.
pub fn rprivate(self) -> Mount
pub fn rprivate(self) -> Mount
Same as specifying both Mount::recursive and Mount::private.
Same as specifying both Mount::recursive and Mount::shared.
Trait Implementations§
impl Eq for Mount
§impl FromStr for Mount
impl FromStr for Mount
impl StructuralPartialEq for Mount
Auto Trait Implementations§
impl Freeze for Mount
impl RefUnwindSafe for Mount
impl Send for Mount
impl Sync for Mount
impl Unpin for Mount
impl UnsafeUnpin for Mount
impl UnwindSafe for Mount
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