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use crate::{
io::{Mode, Stat},
private_trait::Sealed,
proto, Done, Ino, Operation, Reply, Request,
};
use super::{
c_to_os,
traits::{ReplyKnown, ReplyOk, RequestHandle, RequestMode, RequestName},
};
use std::ffi::{CStr, OsStr};
pub enum Forget {}
pub enum Getattr {}
pub enum Mkdir {}
pub enum Unlink {}
pub enum Rmdir {}
pub enum Symlink {}
pub enum Link {}
pub trait RequestForget<'o>: Operation<'o> {
fn forget_list<'a>(request: &'a Request<'o, Self>) -> ForgetList<'a>;
}
pub trait RequestTarget<'o>: Operation<'o> {
fn target<'a>(request: &'a Request<'o, Self>) -> &'a OsStr;
}
pub trait RequestLink<'o>: Operation<'o> {
fn source_ino(request: &Request<'o, Self>) -> Ino;
}
pub trait ReplyStat<'o>: Operation<'o> {
fn stat(reply: Reply<'o, Self>, inode: &impl Stat) -> Done<'o>;
}
pub enum ForgetList<'a> {
Single(Option<(Ino, u64)>),
Batch(std::slice::Iter<'a, proto::ForgetOne>),
}
impl Sealed for Forget {}
impl Sealed for Getattr {}
impl Sealed for Mkdir {}
impl Sealed for Unlink {}
impl Sealed for Rmdir {}
impl Sealed for Symlink {}
impl Sealed for Link {}
impl<'o> Operation<'o> for Forget {
type RequestBody = proto::OpcodeSelect<
(&'o proto::BatchForgetIn, &'o [proto::ForgetOne]),
&'o proto::ForgetIn,
{ proto::Opcode::BatchForget as u32 },
>;
type ReplyState = ();
}
impl<'o> Operation<'o> for Getattr {
type RequestBody = &'o proto::GetattrIn;
type ReplyState = ();
}
impl<'o> Operation<'o> for Mkdir {
type RequestBody = (&'o proto::MkdirIn, &'o CStr);
type ReplyState = ();
}
impl<'o> Operation<'o> for Unlink {
type RequestBody = &'o CStr; // name()
type ReplyState = ();
}
impl<'o> Operation<'o> for Rmdir {
type RequestBody = &'o CStr; // name()
type ReplyState = ();
}
impl<'o> Operation<'o> for Symlink {
type RequestBody = (&'o CStr, &'o CStr); // name(), target()
type ReplyState = ();
}
impl<'o> Operation<'o> for Link {
type RequestBody = (&'o proto::LinkIn, &'o CStr);
type ReplyState = ();
}
impl<'o> RequestForget<'o> for Forget {
fn forget_list<'a>(request: &'a Request<'o, Self>) -> ForgetList<'a> {
use {proto::OpcodeSelect::*, ForgetList::*};
impl Iterator for ForgetList<'_> {
type Item = (Ino, u64);
fn next(&mut self) -> Option<Self::Item> {
match self {
Single(single) => single.take(),
Batch(batch) => {
let forget = batch.next()?;
Some((Ino(forget.ino), forget.nlookup))
}
}
}
}
match request.body {
Match((_, slice)) => Batch(slice.iter()),
Alt(single) => Single(Some((request.ino(), single.nlookup))),
}
}
}
impl<'o> ReplyOk<'o> for Forget {
fn ok(_reply: Reply<'o, Self>) -> Done<'o> {
// No reply for forget requests
Done::new()
}
}
impl<'o> RequestHandle<'o> for Getattr {
fn handle(request: &Request<'o, Self>) -> u64 {
request.body.fh
}
}
impl<'o> ReplyStat<'o> for Getattr {
fn stat(reply: Reply<'o, Self>, inode: &impl Stat) -> Done<'o> {
let (attrs, ttl) = inode.attrs();
let attrs = attrs.finish(inode);
reply.single(&proto::AttrOut {
attr_valid: ttl.seconds,
attr_valid_nsec: ttl.nanoseconds,
dummy: Default::default(),
attr: attrs,
})
}
}
impl<'o> RequestName<'o> for Mkdir {
fn name<'a>(request: &'a Request<'o, Self>) -> &'a OsStr {
let (_header, name) = request.body;
c_to_os(name)
}
}
impl<'o> RequestMode<'o> for Mkdir {
fn mode(request: &Request<'o, Self>) -> Mode {
let (header, _name) = request.body;
Mode::from_bits_truncate(header.mode)
}
}
impl<'o> ReplyKnown<'o> for Mkdir {}
impl<'o> RequestName<'o> for Unlink {
fn name<'a>(request: &'a Request<'o, Self>) -> &'a OsStr {
c_to_os(request.body)
}
}
impl<'o> ReplyOk<'o> for Unlink {}
impl<'o> RequestName<'o> for Rmdir {
fn name<'a>(request: &'a Request<'o, Self>) -> &'a OsStr {
c_to_os(request.body)
}
}
impl<'o> ReplyOk<'o> for Rmdir {}
impl<'o> RequestName<'o> for Symlink {
fn name<'a>(request: &'a Request<'o, Self>) -> &'a OsStr {
let (name, _target) = request.body;
c_to_os(name)
}
}
impl<'o> RequestTarget<'o> for Symlink {
fn target<'a>(request: &'a Request<'o, Self>) -> &'a OsStr {
let (_name, target) = request.body;
c_to_os(target)
}
}
impl<'o> ReplyKnown<'o> for Symlink {}
impl<'o> RequestName<'o> for Link {
fn name<'a>(request: &'a Request<'o, Self>) -> &'a OsStr {
let (_header, name) = request.body;
c_to_os(name)
}
}
impl<'o> RequestLink<'o> for Link {
fn source_ino(request: &Request<'o, Self>) -> Ino {
let (header, _name) = request.body;
Ino(header.old_ino)
}
}
impl<'o> ReplyKnown<'o> for Link {}
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