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internal/netlink: set receive buffer size

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This is done by both systemd sd-device and AOSP ueventd to improve robustness. Rosa OS will still handle ENOBUFS via coldboot but a big buffer should mitigate this as well.

Signed-off-by: Ophestra <cat@gensokyo.uk>
This commit is contained in:
Ophestra
2026-03-30 02:14:47 +09:00
parent 141958656f
commit 584e302168
5 changed files with 29 additions and 8 deletions
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4
internal/uevent/uevent.go
View File

@@ -50,9 +50,9 @@ func (c *Conn) exitExcl() { c.excl.Store(false) }
func (c *Conn) Close() error { return c.conn.Close() }
// Dial returns the address of a newly connected [Conn].
func Dial() (*Conn, error) {
func Dial(rcvbuf int64) (*Conn, error) {
// kernel group is hard coded in lib/kobject_uevent.c, undocumented
c, err := netlink.Dial(syscall.NETLINK_KOBJECT_UEVENT, 1)
c, err := netlink.Dial(syscall.NETLINK_KOBJECT_UEVENT, 1, rcvbuf)
if err != nil {
return nil, err
}

4
internal/uevent/uevent_test.go
View File

@@ -116,7 +116,7 @@ func adeB[V any, S interface {
func TestDialConsume(t *testing.T) {
t.Parallel()
c, err := uevent.Dial()
c, err := uevent.Dial(0)
if err != nil {
t.Fatalf("Dial: error = %v", err)
}
@@ -127,7 +127,7 @@ func TestDialConsume(t *testing.T) {
})
// check kernel-assigned port id
c0, err0 := uevent.Dial()
c0, err0 := uevent.Dial(0)
if err0 != nil {
t.Fatalf("Dial: error = %v", err)
}