Struct virtual_fs::mem_fs::filesystem::FileSystemInner

pub(super) struct FileSystemInner {
    pub(super) storage: Slab<Node>,
    pub(super) backing_offload: Option<OffloadBackingStore>,
    pub(super) limiter: Option<DynFsMemoryLimiter>,
}

The core of the file system. It contains a collection of Nodes, indexed by their respective Inode in a slab.

Fields

storage: Slab<Node>

backing_offload: Option<OffloadBackingStore>

limiter: Option<DynFsMemoryLimiter>

Implementations

impl FileSystemInner

pub(super) fn inode_of(&self, path: &Path) -> Result<InodeResolution>

Get the inode associated to a path if it exists.

pub(super) fn inode_of_parent( &self, parent_path: &Path ) -> Result<InodeResolution>

Get the inode associated to a “parent path”. The returned inode necessarily represents a directory.

pub(super) fn as_parent_get_position_and_inode_of_directory( &self, inode_of_parent: usize, name_of_directory: &OsString, directory_must_be_empty: DirectoryMustBeEmpty ) -> Result<(usize, InodeResolution)>

From the inode of a parent node (so, a directory), returns the child index of name_of_directory along with its inode.

pub(super) fn as_parent_get_position_and_inode_of_file( &self, inode_of_parent: usize, name_of_file: &OsString ) -> Result<Option<(usize, InodeResolution)>>

From the inode of a parent node (so, a directory), returns the child index of name_of_file along with its inode.

fn as_parent_get_position_and_inode( &self, inode_of_parent: usize, name_of: &OsString ) -> Result<Option<(usize, InodeResolution)>>

From the inode of a parent node (so, a directory), returns the child index of name_of along with its inode, whatever the type of inode is (directory or file).

pub(super) fn update_node_name( &mut self, inode: usize, new_name: OsString ) -> Result<()>

Set a new name for the node represented by inode.

pub(super) fn add_child_to_node( &mut self, inode: usize, new_child: usize ) -> Result<()>

Add a child to a directory node represented by inode.

This function also updates the modified time of the directory.

Safety

inode must represents an existing directory.

pub(super) fn remove_child_from_node( &mut self, inode: usize, position: usize ) -> Result<()>

Remove the child at position position of a directory node represented by inode.

This function also updates the modified time of the directory.

Safety

inode must represents an existing directory.

pub(super) fn canonicalize( &self, path: &Path ) -> Result<(PathBuf, InodeResolution)>

Canonicalize a path, i.e. try to resolve to a canonical, absolute form of the path with all intermediate components normalized:

• A path must starts with a root (/),
• A path can contain .. or . components,
• A path must not contain a Windows prefix (C: or \\server),
• A normalized path exists in the file system.

pub(super) fn canonicalize_without_inode(&self, path: &Path) -> Result<PathBuf>

Like Self::canonicalize but without returning the inode of the path, which means that there is no guarantee that the path exists in the file system.

Trait Implementations

impl Debug for FileSystemInner

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

Formats the value using the given formatter.

impl Default for FileSystemInner

fn default() -> Self

Returns the “default value” for a type.