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vhost-user: introduce shared vhost-user state

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When multi queue is enabled e.g. for a virtio-net device,
each queue pair will have a vhost_dev, and the only thing
shared between vhost devs currently is the chardev. This
patch introduces a vhost-user state structure which will
be shared by all vhost devs of the same virtio device.

Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Tiwei Bie 2018-05-24 18:33:33 +08:00 • committed by Michael S. Tsirkin
parent 5f57fbeaaf
commit 4d0cf552d3
10 changed files with 152 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

44
net/vhost-user.c
View file

@ -12,6 +12,7 @@
#include "clients.h"
#include "net/vhost_net.h"
#include "net/vhost-user.h"
#include "hw/virtio/vhost-user.h"
#include "chardev/char-fe.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-net.h"
@ -23,6 +24,7 @@
typedef struct NetVhostUserState {
NetClientState nc;
CharBackend chr; /* only queue index 0 */
VhostUserState *vhost_user;
VHostNetState *vhost_net;
guint watch;
uint64_t acked_features;
@ -64,7 +66,8 @@ static void vhost_user_stop(int queues, NetClientState *ncs[])
}
}
static int vhost_user_start(int queues, NetClientState *ncs[], CharBackend *be)
static int vhost_user_start(int queues, NetClientState *ncs[],
VhostUserState *be)
{
VhostNetOptions options;
struct vhost_net *net = NULL;
@ -144,7 +147,7 @@ static ssize_t vhost_user_receive(NetClientState *nc, const uint8_t *buf,
return size;
}
static void vhost_user_cleanup(NetClientState *nc)
static void net_vhost_user_cleanup(NetClientState *nc)
{
NetVhostUserState *s = DO_UPCAST(NetVhostUserState, nc, nc);
@ -159,6 +162,11 @@ static void vhost_user_cleanup(NetClientState *nc)
s->watch = 0;
}
qemu_chr_fe_deinit(&s->chr, true);
if (s->vhost_user) {
vhost_user_cleanup(s->vhost_user);
g_free(s->vhost_user);
s->vhost_user = NULL;
}
}
qemu_purge_queued_packets(nc);
@ -182,7 +190,7 @@ static NetClientInfo net_vhost_user_info = {
.type = NET_CLIENT_DRIVER_VHOST_USER,
.size = sizeof(NetVhostUserState),
.receive = vhost_user_receive,
.cleanup = vhost_user_cleanup,
.cleanup = net_vhost_user_cleanup,
.has_vnet_hdr = vhost_user_has_vnet_hdr,
.has_ufo = vhost_user_has_ufo,
};
@ -244,7 +252,7 @@ static void net_vhost_user_event(void *opaque, int event)
trace_vhost_user_event(chr->label, event);
switch (event) {
case CHR_EVENT_OPENED:
if (vhost_user_start(queues, ncs, &s->chr) < 0) {
if (vhost_user_start(queues, ncs, s->vhost_user) < 0) {
qemu_chr_fe_disconnect(&s->chr);
return;
}
@ -283,12 +291,19 @@ static int net_vhost_user_init(NetClientState *peer, const char *device,
{
Error *err = NULL;
NetClientState *nc, *nc0 = NULL;
NetVhostUserState *s;
VhostUserState *user = NULL;
NetVhostUserState *s = NULL;
int i;
assert(name);
assert(queues > 0);
user = vhost_user_init();
if (!user) {
error_report("failed to init vhost_user");
goto err;
}
for (i = 0; i < queues; i++) {
nc = qemu_new_net_client(&net_vhost_user_info, peer, device, name);
snprintf(nc->info_str, sizeof(nc->info_str), "vhost-user%d to %s",
@ -299,17 +314,19 @@ static int net_vhost_user_init(NetClientState *peer, const char *device,
s = DO_UPCAST(NetVhostUserState, nc, nc);
if (!qemu_chr_fe_init(&s->chr, chr, &err)) {
error_report_err(err);
return -1;
goto err;
}
user->chr = &s->chr;
}
s = DO_UPCAST(NetVhostUserState, nc, nc);
s->vhost_user = user;
}
s = DO_UPCAST(NetVhostUserState, nc, nc0);
do {
if (qemu_chr_fe_wait_connected(&s->chr, &err) < 0) {
error_report_err(err);
return -1;
goto err;
}
qemu_chr_fe_set_handlers(&s->chr, NULL, NULL,
net_vhost_user_event, NULL, nc0->name, NULL,
@ -319,6 +336,17 @@ static int net_vhost_user_init(NetClientState *peer, const char *device,
assert(s->vhost_net);
return 0;
err:
if (user) {
vhost_user_cleanup(user);
g_free(user);
if (s) {
s->vhost_user = NULL;
}
}
return -1;
}
static Chardev *net_vhost_claim_chardev(