Re: [PATCH v4 01/12] libvhost-user: set msg.msg_control to NULL when it is empty
On 8/5/24 09:44, Stefano Garzarella wrote: On some OS (e.g. macOS) sendmsg() returns -1 (errno EINVAL) if the `struct msghdr` has the field `msg_controllen` set to 0, but `msg_control` is not NULL. Reviewed-by: Eric Blake Reviewed-by: David Hildenbrand Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Stefano Garzarella --- subprojects/libvhost-user/libvhost-user.c | 1 + 1 file changed, 1 insertion(+) Tested-by: Philippe Mathieu-Daudé
Re: [PATCH v4 01/12] libvhost-user: set msg.msg_control to NULL when it is empty
On Wed, May 08, 2024 at 09:57:13AM GMT, Daniel P. Berrangé wrote:
On Wed, May 08, 2024 at 09:44:45AM +0200, Stefano Garzarella wrote:
On some OS (e.g. macOS) sendmsg() returns -1 (errno EINVAL) if
the `struct msghdr` has the field `msg_controllen` set to 0, but
`msg_control` is not NULL.
Reviewed-by: Eric Blake
Reviewed-by: David Hildenbrand
Reviewed-by: Philippe Mathieu-Daud??
Philippe's name has got mangled here
Thank you for bringing this to my attention and helping me solve it
off-list.
It should be fixed with the next posting!
Stefano
Signed-off-by: Stefano Garzarella
---
subprojects/libvhost-user/libvhost-user.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/subprojects/libvhost-user/libvhost-user.c
b/subprojects/libvhost-user/libvhost-user.c
index a879149fef..22bea0c775 100644
--- a/subprojects/libvhost-user/libvhost-user.c
+++ b/subprojects/libvhost-user/libvhost-user.c
@@ -632,6 +632,7 @@ vu_message_write(VuDev *dev, int conn_fd, VhostUserMsg
*vmsg)
memcpy(CMSG_DATA(cmsg), vmsg->fds, fdsize);
} else {
msg.msg_controllen = 0;
+msg.msg_control = NULL;
}
do {
--
2.45.0
With regards,
Daniel
--
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Re: [PATCH v4 01/12] libvhost-user: set msg.msg_control to NULL when it is empty
On Wed, May 08, 2024 at 09:44:45AM +0200, Stefano Garzarella wrote:
> On some OS (e.g. macOS) sendmsg() returns -1 (errno EINVAL) if
> the `struct msghdr` has the field `msg_controllen` set to 0, but
> `msg_control` is not NULL.
>
> Reviewed-by: Eric Blake
> Reviewed-by: David Hildenbrand
> Reviewed-by: Philippe Mathieu-Daud??
Philippe's name has got mangled here
> Signed-off-by: Stefano Garzarella
> ---
> subprojects/libvhost-user/libvhost-user.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/subprojects/libvhost-user/libvhost-user.c
> b/subprojects/libvhost-user/libvhost-user.c
> index a879149fef..22bea0c775 100644
> --- a/subprojects/libvhost-user/libvhost-user.c
> +++ b/subprojects/libvhost-user/libvhost-user.c
> @@ -632,6 +632,7 @@ vu_message_write(VuDev *dev, int conn_fd, VhostUserMsg
> *vmsg)
> memcpy(CMSG_DATA(cmsg), vmsg->fds, fdsize);
> } else {
> msg.msg_controllen = 0;
> +msg.msg_control = NULL;
> }
>
> do {
> --
> 2.45.0
>
With regards,
Daniel
--
|: https://berrange.com -o-https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org -o-https://fstop138.berrange.com :|
|: https://entangle-photo.org-o-https://www.instagram.com/dberrange :|
