From e59610a64977946af99f8aae12ba45a5200e8b6e Mon Sep 17 00:00:00 2001
From: Tim Culverhouse <tim@timculverhouse.com>
Date: Sun, 22 Sep 2024 21:02:29 -0500
Subject: [PATCH] io_uring: handle INTR error from write

It is possible to get an EINTR error from io_uring when copying cqes.
xev already handles EINTR automatically when it occurs during
io_uring_enter, but doesn't handle it if an individual cqe copy has this
error.

Automatically rearm the completion when the result is EINTR.
---
 src/backend/io_uring.zig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/backend/io_uring.zig b/src/backend/io_uring.zig
index e9e2d02..8ec9c81 100644
--- a/src/backend/io_uring.zig
+++ b/src/backend/io_uring.zig
@@ -744,6 +744,8 @@ pub const Completion = struct {
                     @intCast(res)
                 else switch (@as(posix.E, @enumFromInt(-res))) {
                     .CANCELED => error.Canceled,
+                    // If a write is interrupted, we retry it automatically.
+                    .INTR => return .rearm,
                     else => |errno| posix.unexpectedErrno(errno),
                 },
             },