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vsock: Add support for SIOCINQ ioctl

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Add support for SIOCINQ ioctl, indicating the length of bytes unread in the
socket. The value is obtained from `vsock_stream_has_data()`.

Signed-off-by: Xuewei Niu <[email protected]>
Reviewed-by: Stefano Garzarella <[email protected]>
Reviewed-by: Luigi Leonardi <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
This commit is contained in:
Xuewei Niu authored and Jakub Kicinski committed 2025-07-09 19:29:52 -07:00
1 parent f0c5827d07
commit f7c7226592
1 file changed
+22
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net/vmw_vsock/af_vsock.c
+22
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@@ -1389,6 +1389,28 @@ static int vsock_do_ioctl(struct socket *sock, unsigned int cmd,
vsk = vsock_sk(sk);
switch (cmd) {
case SIOCINQ: {
ssize_t n_bytes;
if (!vsk->transport) {
ret = -EOPNOTSUPP;
break;
}
if (sock_type_connectible(sk->sk_type) &&
sk->sk_state == TCP_LISTEN) {
ret = -EINVAL;
break;
}
n_bytes = vsock_stream_has_data(vsk);
if (n_bytes < 0) {
ret = n_bytes;
break;
}
ret = put_user(n_bytes, arg);
break;
}
case SIOCOUTQ: {
ssize_t n_bytes;