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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

7
passt.h
View file

@ -25,6 +25,7 @@ union epoll_ref;
#include "fwd.h"
#include "tcp.h"
#include "udp.h"
#include "vhost_user.h"
/* Default address for our end on the tap interface. Bit 0 of byte 0 must be 0
* (unicast) and bit 1 of byte 1 must be 1 (locally administered). Otherwise
@ -43,6 +44,7 @@ union epoll_ref;
* @icmp: ICMP-specific reference part
* @data: Data handled by protocol handlers
* @nsdir_fd: netns dirfd for fallback timer checking if namespace is gone
* @queue: vhost-user queue index for this fd
* @u64: Opaque reference for epoll_ctl() and epoll_wait()
*/
union epoll_ref {
@ -58,6 +60,7 @@ union epoll_ref {
union udp_listen_epoll_ref udp;
uint32_t data;
int nsdir_fd;
int queue;
};
};
uint64_t u64;
@ -94,6 +97,7 @@ struct fqdn {
enum passt_modes {
MODE_PASST,
MODE_PASTA,
MODE_VU,
};
/**
@ -229,6 +233,7 @@ struct ip6_ctx {
* @freebind: Allow binding of non-local addresses for forwarding
* @low_wmem: Low probed net.core.wmem_max
* @low_rmem: Low probed net.core.rmem_max
* @vdev: vhost-user device
*/
struct ctx {
enum passt_modes mode;
@ -291,6 +296,8 @@ struct ctx {
int low_wmem;
int low_rmem;
struct vu_dev *vdev;
};
void proto_update_l2_buf(const unsigned char *eth_d,