Struct TmpFsDirectory 

pub struct TmpFsDirectory { /* private fields */ }

Implementations

impl TmpFsDirectory

pub fn new() -> Self

Trait Implementations

impl FsNodeOps for TmpFsDirectory

fn get_xattr( &self, locked: &mut Locked<FileOpsCore>, _node: &FsNode, _current_task: &CurrentTask, name: &FsStr, _size: usize, ) -> Result<ValueOrSize<FsString>, Errno>

Get an extended attribute on the node.

fn set_xattr( &self, locked: &mut Locked<FileOpsCore>, _node: &FsNode, _current_task: &CurrentTask, name: &FsStr, value: &FsStr, op: XattrOp, ) -> Result<(), Errno>

Set an extended attribute on the node.

fn remove_xattr( &self, locked: &mut Locked<FileOpsCore>, _node: &FsNode, _current_task: &CurrentTask, name: &FsStr, ) -> Result<(), Errno>

fn list_xattrs( &self, locked: &mut Locked<FileOpsCore>, _node: &FsNode, _current_task: &CurrentTask, _size: usize, ) -> Result<ValueOrSize<Vec<FsString>>, Errno>

An implementation can systematically return a value. Otherwise, if max_size is 0, it can instead return the size of the 0 separated string needed to represent the value, and can return an ERANGE error if max_size is not 0, and lesser than the required size.

fn create_file_ops( &self, _locked: &mut Locked<FileOpsCore>, _node: &FsNode, _current_task: &CurrentTask, _flags: OpenFlags, ) -> Result<Box<dyn FileOps>, Errno>

Build the FileOps for the file associated to this node.

fn mkdir( &self, _locked: &mut Locked<FileOpsCore>, node: &FsNode, _current_task: &CurrentTask, _name: &FsStr, mode: FileMode, owner: FsCred, ) -> Result<FsNodeHandle, Errno>

Create and return the given child node as a subdirectory.

fn mknod( &self, _locked: &mut Locked<FileOpsCore>, node: &FsNode, _current_task: &CurrentTask, _name: &FsStr, mode: FileMode, dev: DeviceType, owner: FsCred, ) -> Result<FsNodeHandle, Errno>

Create and return the given child node.

fn create_symlink( &self, _locked: &mut Locked<FileOpsCore>, node: &FsNode, _current_task: &CurrentTask, _name: &FsStr, target: &FsStr, owner: FsCred, ) -> Result<FsNodeHandle, Errno>

Creates a symlink with the given target path.

fn create_tmpfile( &self, node: &FsNode, _current_task: &CurrentTask, mode: FileMode, owner: FsCred, ) -> Result<FsNodeHandle, Errno>

Creates an anonymous file.

fn link( &self, _locked: &mut Locked<FileOpsCore>, _node: &FsNode, _current_task: &CurrentTask, _name: &FsStr, child: &FsNodeHandle, ) -> Result<(), Errno>

Create a hard link with the given name to the given child.

fn unlink( &self, _locked: &mut Locked<FileOpsCore>, node: &FsNode, _current_task: &CurrentTask, _name: &FsStr, child_to_unlink: &FsNodeHandle, ) -> Result<(), Errno>

Remove the child with the given name, if the child exists.

fn check_access( &self, _locked: &mut Locked<FileOpsCore>, node: &FsNode, current_task: &CurrentTask, access: PermissionFlags, info: &RwLock<FsNodeInfo>, reason: CheckAccessReason, audit_context: Auditable<'_>, ) -> Result<(), Errno>

Delegate the access check to the node.

fn create_dir_entry_ops(&self) -> Box<dyn DirEntryOps>

Build the DirEntryOps for a new [DirEntry] that will be associated to this node.

fn lookup( &self, _locked: &mut Locked<FileOpsCore>, _node: &FsNode, _current_task: &CurrentTask, name: &FsStr, ) -> Result<FsNodeHandle, Errno>

Find an existing child node and populate the child parameter. Return the node.

fn readlink( &self, _locked: &mut Locked<FileOpsCore>, _node: &FsNode, _current_task: &CurrentTask, ) -> Result<SymlinkTarget, Errno>

Reads the symlink from this node.

fn append_lock_read<'a>( &'a self, locked: &'a mut Locked<BeforeFsNodeAppend>, node: &'a FsNode, current_task: &CurrentTask, ) -> Result<(RwQueueReadGuard<'a, FsNodeAppend>, &'a mut Locked<FsNodeAppend>), Errno>

Acquire the necessary append lock for the operations that depend on them. Should be done before calling allocate or truncate to avoid lock ordering issues.

fn truncate( &self, _locked: &mut Locked<FileOpsCore>, _guard: &AppendLockGuard<'_>, _node: &FsNode, _current_task: &CurrentTask, _length: u64, ) -> Result<(), Errno>

Change the length of the file.

fn allocate( &self, _locked: &mut Locked<FileOpsCore>, _guard: &AppendLockGuard<'_>, _node: &FsNode, _current_task: &CurrentTask, _mode: FallocMode, _offset: u64, _length: u64, ) -> Result<(), Errno>

Manipulate allocated disk space for the file.

fn initial_info(&self, _info: &mut FsNodeInfo)

Update the supplied info with initial state (e.g. size) for the node.

fn fetch_and_refresh_info<'a>( &self, _locked: &mut Locked<FileOpsCore>, _node: &FsNode, _current_task: &CurrentTask, info: &'a RwLock<FsNodeInfo>, ) -> Result<RwLockReadGuard<'a, FsNodeInfo>, Errno>

Update node.info as needed.

fn update_attributes( &self, _locked: &mut Locked<FileOpsCore>, _current_task: &CurrentTask, _info: &FsNodeInfo, _has: zxio_node_attr_has_t, ) -> Result<(), Errno>

Update node attributes persistently.

fn forget( self: Box<Self>, _locked: &mut Locked<FileOpsCore>, _current_task: &CurrentTask, _info: FsNodeInfo, ) -> Result<(), Errno>

Called when the FsNode is freed by the Kernel.

fn enable_fsverity( &self, _descriptor: &fsverity_descriptor, ) -> Result<(), Errno>

Marks that FS-Verity is being built. Writes fsverity descriptor and merkle tree, the latter computed by the filesystem. This should ensure there are no writable file handles. Returns EEXIST if the file was already fsverity-enabled. Returns EBUSY if this ioctl was already running on this file.

fn get_fsverity_descriptor( &self, _log_blocksize: u8, ) -> Result<fsverity_descriptor, Errno>

Read fsverity descriptor, if the node is fsverity-enabled. Else returns ENODATA.

fn internal_name(&self, _node: &FsNode) -> Option<FsString>

Returns a descriptive name for this node, suitable to report to userspace in situations where the node’s path is unavailable (e.g. because it is anonymous, and has no path). If no name is returned then a default name of the form “<class:[<node_id>]” will be used.

fn node_key(&self, node: &FsNode) -> ino_t

The key used to identify this node in the file system’s node cache.