Re: [RFC PATCH v5 07/17] vsock: read from socket's error queue
From: Stefano Garzarella <sgarzare@redhat.com>
Date: 2023-07-06 16:55:47
Also in:
kvm, lkml, virtualization
On Sat, Jul 01, 2023 at 09:39:37AM +0300, Arseniy Krasnov wrote:
This adds handling of MSG_ERRQUEUE input flag in receive call. This flag is used to read socket's error queue instead of data queue. Possible scenario of error queue usage is receiving completions for transmission with MSG_ZEROCOPY flag. This patch also adds 'SOL_VSOCK' define. Signed-off-by: Arseniy Krasnov <redacted> --- Changelog: v4 -> v5: * Update commit message by adding sentence that 'SOL_VSOCK' is also added.
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
quoted hunk ↗ jump to hunk
include/linux/socket.h | 1 + net/vmw_vsock/af_vsock.c | 5 +++++ 2 files changed, 6 insertions(+)diff --git a/include/linux/socket.h b/include/linux/socket.h index bd1cc3238851..d79efd026880 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h@@ -382,6 +382,7 @@ struct ucred {#define SOL_MPTCP 284 #define SOL_MCTP 285 #define SOL_SMC 286 +#define SOL_VSOCK 287 /* IPX options */ #define IPX_TYPE 1diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index 45fd20c4ed50..07803d9fbf6d 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c@@ -110,6 +110,7 @@#include <linux/workqueue.h> #include <net/sock.h> #include <net/af_vsock.h> +#include <linux/errqueue.h> static int __vsock_bind(struct sock *sk, struct sockaddr_vm *addr); static void vsock_sk_destruct(struct sock *sk);@@ -2135,6 +2136,10 @@ vsock_connectible_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,int err; sk = sock->sk; + + if (unlikely(flags & MSG_ERRQUEUE)) + return sock_recv_errqueue(sk, msg, len, SOL_VSOCK, 0); + vsk = vsock_sk(sk); err = 0; -- 2.25.1