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fix(virtio): monitor ioeventfds with IORING_OP_POLL_ADD

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Signed-off-by: Changyuan Lyu <changyuanl@google.com>
This commit is contained in:
Changyuan Lyu 2024-10-06 22:26:02 -07:00 committed by Lencerf
parent bc40ba6c71
commit acdfb5dbca
1 changed files with 3 additions and 9 deletions
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12
alioth/src/virtio/worker/io_uring.rs
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@ -12,7 +12,6 @@
// See the License for the specific language governing permissions and
// limitations under the License.
use std::cell::UnsafeCell;
use std::collections::HashMap;
use std::os::fd::AsRawFd;
use std::sync::mpsc::Receiver;
@ -63,7 +62,6 @@ const TOKEN_QUEUE: u64 = 1 << 62;
const TOKEN_DESCRIPTOR: u64 = 1 << 62 | 1 << 61;
pub struct IoUring<E> {
efd_buffer: UnsafeCell<u64>,
queue_ioeventfds: Arc<[(E, bool)]>,
queue_submits: Box<[QueueSubmit]>,
waker: Arc<Waker>,
@ -77,8 +75,8 @@ where
fn submit_queue_ioeventfd(&self, index: u16, fd: &E, data: &mut RingData) -> Result<()> {
let token = index as u64 | TOKEN_QUEUE;
let fd = types::Fd(fd.as_fd().as_raw_fd());
let read = opcode::Read::new(fd, self.efd_buffer.get() as *mut u8, 8);
let entry = read.build().user_data(token);
let poll = opcode::PollAdd::new(fd, libc::EPOLLIN as _).multi(true);
let entry = poll.build().user_data(token);
unsafe { data.ring.submission().push(&entry) }.unwrap();
Ok(())
}
@ -105,7 +103,6 @@ where
{
let waker = Waker::new_eventfd()?;
let ring = IoUring {
efd_buffer: UnsafeCell::new(0),
queue_ioeventfds: fds,
waker: Arc::new(waker),
waker_token: 0,
@ -267,10 +264,7 @@ where
};
let queue_submit = self.queue_submits.get_mut(index as usize).unwrap();
submit_buffer(q, queue_submit, dev, index, irq_sender, data)?;
let (fd, _) = self.queue_ioeventfds.get(index as usize).unwrap();
self.submit_queue_ioeventfd(index, fd, data)?;
Ok(())
submit_buffer(q, queue_submit, dev, index, irq_sender, data)
}
fn reset(&self, _dev: &mut D) -> Result<()> {