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use crate::{
io::{AccessFlags, Known, Mode, OpenFlags, Stat},
proto::{self, OpenOutFlags},
sealed::Sealed,
util::OutputChain,
Done, Errno, Operation, Reply, Request, Ttl,
};
use super::{
c_to_os, make_entry,
traits::{ReplyKnown, ReplyOk, RequestFlags, RequestHandle, RequestMode, RequestName},
FromRequest,
};
use bytemuck::bytes_of;
use std::ffi::{CStr, OsStr};
pub enum Open {}
pub enum Release {}
pub enum Opendir {}
pub enum Releasedir {}
pub enum Access {}
pub enum Create {}
pub trait ReplyOpen<'o>: Operation<'o, ReplyState = OpenOutFlags> {
fn ok_with_handle(reply: Reply<'o, Self>, handle: u64) -> Done<'o>
where
Self: ReplyOk<'o>,
{
let open_flags = open_flags_bits(reply.state);
reply.single(&proto::OpenOut {
fh: handle,
open_flags,
padding: Default::default(),
})
}
fn known_with_handle(
reply: Reply<'o, Self>,
known: impl Known,
ttl: Ttl,
handle: u64,
) -> Done<'o>
where
Self: ReplyKnown<'o>,
{
let (attrs, attrs_ttl) = known.inode().attrs();
let attrs = attrs.finish(known.inode());
let entry = make_entry((known.inode().ino(), ttl), (attrs, attrs_ttl));
let open = proto::OpenOut {
fh: handle,
open_flags: open_flags_bits(reply.state),
padding: Default::default(),
};
let done = reply.chain(OutputChain::tail(&[bytes_of(&entry), bytes_of(&open)]));
known.unveil();
done
}
fn force_direct_io(reply: &mut Reply<'o, Self>) {
reply.state |= OpenOutFlags::DIRECT_IO;
}
fn non_seekable(reply: &mut Reply<'o, Self>) {
reply.state |= OpenOutFlags::NONSEEKABLE;
}
fn is_stream(reply: &mut Reply<'o, Self>) {
reply.state |= OpenOutFlags::STREAM;
}
}
pub trait ReplyPermissionDenied<'o>: Operation<'o> {
fn permission_denied(reply: Reply<'o, Self>) -> Done<'o> {
reply.fail(Errno::EACCES)
}
}
impl Sealed for Open {}
impl Sealed for Release {}
impl Sealed for Opendir {}
impl Sealed for Releasedir {}
impl Sealed for Access {}
impl Sealed for Create {}
impl<'o> Operation<'o> for Open {
type RequestBody = &'o proto::OpenIn;
type ReplyState = OpenOutFlags;
}
impl<'o> Operation<'o> for Release {
type RequestBody = &'o proto::ReleaseIn;
type ReplyState = ();
}
impl<'o> Operation<'o> for Opendir {
type RequestBody = &'o proto::OpendirIn;
type ReplyState = OpenOutFlags;
}
impl<'o> Operation<'o> for Releasedir {
type RequestBody = &'o proto::ReleasedirIn;
type ReplyState = ();
}
impl<'o> Operation<'o> for Access {
type RequestBody = &'o proto::AccessIn;
type ReplyState = ();
}
impl<'o> Operation<'o> for Create {
type RequestBody = (&'o proto::CreateIn, &'o CStr);
type ReplyState = OpenOutFlags;
}
impl<'o> RequestFlags<'o> for Open {
type Flags = OpenFlags;
fn flags(request: &Request<'o, Self>) -> Self::Flags {
OpenFlags::from_bits_truncate(request.body.flags as _)
}
}
impl<'o> ReplyOk<'o> for Open {
fn ok(reply: Reply<'o, Self>) -> Done<'o> {
reply.ok_with_handle(0)
}
}
impl<'o> ReplyOpen<'o> for Open {}
impl<'o> ReplyPermissionDenied<'o> for Open {}
impl<'o> RequestHandle<'o> for Release {
fn handle(request: &Request<'o, Self>) -> u64 {
request.body.fh
}
}
impl<'o> ReplyOk<'o> for Release {}
impl<'o> ReplyOk<'o> for Opendir {
fn ok(reply: Reply<'o, Self>) -> Done<'o> {
reply.ok_with_handle(0)
}
}
impl<'o> ReplyPermissionDenied<'o> for Opendir {}
impl<'o> ReplyOpen<'o> for Opendir {}
impl<'o> RequestHandle<'o> for Releasedir {
fn handle(request: &Request<'o, Self>) -> u64 {
request.body.release_in.fh
}
}
impl<'o> ReplyOk<'o> for Releasedir {}
impl<'o> RequestFlags<'o> for Access {
type Flags = AccessFlags;
fn flags(request: &Request<'o, Self>) -> Self::Flags {
AccessFlags::from_bits_truncate(request.body.mask as i32)
}
}
impl<'o> ReplyOk<'o> for Access {}
impl<'o> ReplyPermissionDenied<'o> for Access {}
impl<'o, O: ReplyOpen<'o>> FromRequest<'o, O> for OpenOutFlags {
fn from_request(_request: &Request<'o, O>) -> Self {
OpenOutFlags::empty()
}
}
impl<'o> RequestName<'o> for Create {
fn name<'a>(request: &'a Request<'o, Self>) -> &'a OsStr {
let (_header, name) = request.body;
c_to_os(name)
}
}
impl<'o> RequestMode<'o> for Create {
fn mode(request: &Request<'o, Self>) -> Mode {
let (header, _name) = request.body;
Mode::from_bits_truncate(header.mode)
}
fn umask(request: &Request<'o, Self>) -> Mode {
let (header, _name) = request.body;
Mode::from_bits_truncate(header.umask)
}
}
impl<'o> RequestFlags<'o> for Create {
type Flags = OpenFlags;
fn flags(request: &Request<'o, Self>) -> Self::Flags {
let (header, _name) = request.body;
OpenFlags::from_bits_truncate(header.flags as _)
}
}
impl<'o> ReplyKnown<'o> for Create {
fn known(reply: Reply<'o, Self>, entry: impl Known, ttl: Ttl) -> Done<'o> {
reply.known_with_handle(entry, ttl, 0)
}
}
impl<'o> ReplyOpen<'o> for Create {}
impl<'o> ReplyPermissionDenied<'o> for Create {}
fn open_flags_bits(flags: OpenOutFlags) -> u32 {
(flags & OpenOutFlags::KEEP_CACHE & OpenOutFlags::CACHE_DIR).bits()
}
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