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io: use io_uring for all io

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There should no longer be any

- read
- write
- connect
- sendmsg
- recvmsg
- accept

calls in the codebase. Previously we were using a mix of io_uring and
these calls which had some negative effects: Since we were using the old
system calls, we had to set the file descriptors to non-blocking. But
our io_uring code did not handle EAGAIN. This lead to programs sometimes
being killed when the wayland IO was actually blocking.

Now all file descriptors are set to blocking, but io_uring makes it
non-blocking from our perspective. The one exception are evdev files
because they are read via libinput and libinput uses the old system
calls.
This commit is contained in:
Julian Orth 2022-12-31 17:55:58 +01:00
parent 2db0ee8995
commit 9812a02f87
55 changed files with 900 additions and 672 deletions
Download patch file Download diff file Expand all files Collapse all files

10
src/portal/ptl_display.rs
View file

@ -234,7 +234,7 @@ impl UsrJayOutputOwner for PortalOutput {
impl UsrWlOutputOwner for PortalOutput {}
fn maybe_add_display(state: &Rc<PortalState>, name: &str) {
async fn maybe_add_display(state: &Rc<PortalState>, name: &str) {
let tail = match name.strip_prefix("wayland-") {
Some(t) => t,
_ => return,
@ -248,7 +248,7 @@ fn maybe_add_display(state: &Rc<PortalState>, name: &str) {
_ => return,
};
let path = format!("{}/{}", state.xrd, name);
let con = match UsrCon::new(&state.ring, &state.wheel, &state.eng, &path, num) {
let con = match UsrCon::new(&state.ring, &state.wheel, &state.eng, &path, num).await {
Ok(c) => c,
Err(e) => {
log::error!(
@ -437,7 +437,7 @@ fn add_output(dpy: &Rc<PortalDisplay>, name: u32, version: u32) {
}
pub(super) async fn watch_displays(state: Rc<PortalState>) {
let inotify = Rc::new(uapi::inotify_init1(c::IN_CLOEXEC | c::IN_NONBLOCK).unwrap());
let inotify = Rc::new(uapi::inotify_init1(c::IN_CLOEXEC).unwrap());
if let Err(e) = uapi::inotify_add_watch(inotify.raw(), state.xrd.as_str(), c::IN_CREATE) {
log::error!(
"Cannot watch directory `{}`: {}",
@ -462,7 +462,7 @@ pub(super) async fn watch_displays(state: Rc<PortalState>) {
}
};
if let Ok(s) = std::str::from_utf8(entry.file_name().as_bytes()) {
maybe_add_display(&state, s);
maybe_add_display(&state, s).await;
}
}
let mut buf = vec![0u8; 4096];
@ -480,7 +480,7 @@ pub(super) async fn watch_displays(state: Rc<PortalState>) {
for event in events {
if event.mask.contains(c::IN_CREATE) {
if let Ok(s) = std::str::from_utf8(event.name().as_ustr().as_bytes()) {
maybe_add_display(&state, s);
maybe_add_display(&state, s).await;
}
}
}