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vhost-user: add vhost-user

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add virtio and vhost-user functions to connect with QEMU.

  $ ./passt --vhost-user

and

  # qemu-system-x86_64 ... -m 4G \
        -object memory-backend-memfd,id=memfd0,share=on,size=4G \
        -numa node,memdev=memfd0 \
        -chardev socket,id=chr0,path=/tmp/passt_1.socket \
        -netdev vhost-user,id=netdev0,chardev=chr0 \
        -device virtio-net,mac=9a:2b:2c:2d:2e:2f,netdev=netdev0 \
        ...

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
This commit is contained in:
Laurent Vivier 2024-11-13 09:04:06 +01:00 • committed by Stefano Brivio
parent 007af94bb9
commit 92fe7e967a
24 changed files with 1412 additions and 54 deletions

9
passt.c
View file

@ -50,6 +50,7 @@
#include "log.h"
#include "tcp_splice.h"
#include "ndp.h"
#include "vu_common.h"
#define EPOLL_EVENTS 8
@ -72,6 +73,8 @@ char *epoll_type_str[] = {
[EPOLL_TYPE_TAP_PASTA] = "/dev/net/tun device",
[EPOLL_TYPE_TAP_PASST] = "connected qemu socket",
[EPOLL_TYPE_TAP_LISTEN] = "listening qemu socket",
[EPOLL_TYPE_VHOST_CMD] = "vhost-user command socket",
[EPOLL_TYPE_VHOST_KICK] = "vhost-user kick socket",
};
static_assert(ARRAY_SIZE(epoll_type_str) == EPOLL_NUM_TYPES,
"epoll_type_str[] doesn't match enum epoll_type");
@ -346,6 +349,12 @@ loop:
case EPOLL_TYPE_PING:
icmp_sock_handler(&c, ref);
break;
case EPOLL_TYPE_VHOST_CMD:
vu_control_handler(c.vdev, c.fd_tap, eventmask);
break;
case EPOLL_TYPE_VHOST_KICK:
vu_kick_cb(c.vdev, ref, &now);
break;
default:
/* Can't happen */
ASSERT(0);