*
*/
+#include "qemu/osdep.h"
#include "clients.h"
#include "net/vhost_net.h"
#include "net/vhost-user.h"
#include "sysemu/char.h"
#include "qemu/config-file.h"
#include "qemu/error-report.h"
+#include "qmp-commands.h"
+#include "trace.h"
typedef struct VhostUserState {
NetClientState nc;
- CharDriverState *chr;
+ CharBackend chr; /* only queue index 0 */
VHostNetState *vhost_net;
+ guint watch;
+ uint64_t acked_features;
+ bool started;
} VhostUserState;
-typedef struct VhostUserChardevProps {
- bool is_socket;
- bool is_unix;
- bool is_server;
-} VhostUserChardevProps;
-
VHostNetState *vhost_user_get_vhost_net(NetClientState *nc)
{
VhostUserState *s = DO_UPCAST(VhostUserState, nc, nc);
- assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
+ assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_USER);
return s->vhost_net;
}
-static int vhost_user_running(VhostUserState *s)
+uint64_t vhost_user_get_acked_features(NetClientState *nc)
{
- return (s->vhost_net) ? 1 : 0;
+ VhostUserState *s = DO_UPCAST(VhostUserState, nc, nc);
+ assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_USER);
+ return s->acked_features;
}
-static int vhost_user_start(VhostUserState *s)
+static void vhost_user_stop(int queues, NetClientState *ncs[])
{
- VhostNetOptions options;
+ VhostUserState *s;
+ int i;
- if (vhost_user_running(s)) {
- return 0;
+ for (i = 0; i < queues; i++) {
+ assert(ncs[i]->info->type == NET_CLIENT_DRIVER_VHOST_USER);
+
+ s = DO_UPCAST(VhostUserState, nc, ncs[i]);
+
+ if (s->vhost_net) {
+ /* save acked features */
+ uint64_t features = vhost_net_get_acked_features(s->vhost_net);
+ if (features) {
+ s->acked_features = features;
+ }
+ vhost_net_cleanup(s->vhost_net);
+ }
}
+}
+
+static int vhost_user_start(int queues, NetClientState *ncs[], CharBackend *be)
+{
+ VhostNetOptions options;
+ struct vhost_net *net = NULL;
+ VhostUserState *s;
+ int max_queues;
+ int i;
options.backend_type = VHOST_BACKEND_TYPE_USER;
- options.net_backend = &s->nc;
- options.opaque = s->chr;
- options.force = true;
- s->vhost_net = vhost_net_init(&options);
+ for (i = 0; i < queues; i++) {
+ assert(ncs[i]->info->type == NET_CLIENT_DRIVER_VHOST_USER);
+
+ s = DO_UPCAST(VhostUserState, nc, ncs[i]);
+
+ options.net_backend = ncs[i];
+ options.opaque = be;
+ options.busyloop_timeout = 0;
+ net = vhost_net_init(&options);
+ if (!net) {
+ error_report("failed to init vhost_net for queue %d", i);
+ goto err;
+ }
+
+ if (i == 0) {
+ max_queues = vhost_net_get_max_queues(net);
+ if (queues > max_queues) {
+ error_report("you are asking more queues than supported: %d",
+ max_queues);
+ goto err;
+ }
+ }
+
+ if (s->vhost_net) {
+ vhost_net_cleanup(s->vhost_net);
+ g_free(s->vhost_net);
+ }
+ s->vhost_net = net;
+ }
- return vhost_user_running(s) ? 0 : -1;
+ return 0;
+
+err:
+ if (net) {
+ vhost_net_cleanup(net);
+ }
+ vhost_user_stop(i, ncs);
+ return -1;
}
-static void vhost_user_stop(VhostUserState *s)
+static ssize_t vhost_user_receive(NetClientState *nc, const uint8_t *buf,
+ size_t size)
{
- if (vhost_user_running(s)) {
- vhost_net_cleanup(s->vhost_net);
+ /* In case of RARP (message size is 60) notify backup to send a fake RARP.
+ This fake RARP will be sent by backend only for guest
+ without GUEST_ANNOUNCE capability.
+ */
+ if (size == 60) {
+ VhostUserState *s = DO_UPCAST(VhostUserState, nc, nc);
+ int r;
+ static int display_rarp_failure = 1;
+ char mac_addr[6];
+
+ /* extract guest mac address from the RARP message */
+ memcpy(mac_addr, &buf[6], 6);
+
+ r = vhost_net_notify_migration_done(s->vhost_net, mac_addr);
+
+ if ((r != 0) && (display_rarp_failure)) {
+ fprintf(stderr,
+ "Vhost user backend fails to broadcast fake RARP\n");
+ fflush(stderr);
+ display_rarp_failure = 0;
+ }
}
- s->vhost_net = 0;
+ return size;
}
static void vhost_user_cleanup(NetClientState *nc)
{
VhostUserState *s = DO_UPCAST(VhostUserState, nc, nc);
- vhost_user_stop(s);
+ if (s->vhost_net) {
+ vhost_net_cleanup(s->vhost_net);
+ g_free(s->vhost_net);
+ s->vhost_net = NULL;
+ }
+ if (nc->queue_index == 0) {
+ qemu_chr_fe_deinit(&s->chr);
+ }
+
qemu_purge_queued_packets(nc);
}
static bool vhost_user_has_vnet_hdr(NetClientState *nc)
{
- assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
+ assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_USER);
return true;
}
static bool vhost_user_has_ufo(NetClientState *nc)
{
- assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
+ assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_USER);
return true;
}
static NetClientInfo net_vhost_user_info = {
- .type = NET_CLIENT_OPTIONS_KIND_VHOST_USER,
+ .type = NET_CLIENT_DRIVER_VHOST_USER,
.size = sizeof(VhostUserState),
+ .receive = vhost_user_receive,
.cleanup = vhost_user_cleanup,
.has_vnet_hdr = vhost_user_has_vnet_hdr,
.has_ufo = vhost_user_has_ufo,
};
-static void net_vhost_link_down(VhostUserState *s, bool link_down)
+static gboolean net_vhost_user_watch(GIOChannel *chan, GIOCondition cond,
+ void *opaque)
{
- s->nc.link_down = link_down;
-
- if (s->nc.peer) {
- s->nc.peer->link_down = link_down;
- }
+ VhostUserState *s = opaque;
- if (s->nc.info->link_status_changed) {
- s->nc.info->link_status_changed(&s->nc);
- }
+ qemu_chr_fe_disconnect(&s->chr);
- if (s->nc.peer && s->nc.peer->info->link_status_changed) {
- s->nc.peer->info->link_status_changed(s->nc.peer);
- }
+ return FALSE;
}
static void net_vhost_user_event(void *opaque, int event)
{
- VhostUserState *s = opaque;
+ const char *name = opaque;
+ NetClientState *ncs[MAX_QUEUE_NUM];
+ VhostUserState *s;
+ CharDriverState *chr;
+ Error *err = NULL;
+ int queues;
+ queues = qemu_find_net_clients_except(name, ncs,
+ NET_CLIENT_DRIVER_NIC,
+ MAX_QUEUE_NUM);
+ assert(queues < MAX_QUEUE_NUM);
+
+ s = DO_UPCAST(VhostUserState, nc, ncs[0]);
+ chr = qemu_chr_fe_get_driver(&s->chr);
+ trace_vhost_user_event(chr->label, event);
switch (event) {
case CHR_EVENT_OPENED:
- vhost_user_start(s);
- net_vhost_link_down(s, false);
- error_report("chardev \"%s\" went up", s->nc.info_str);
+ s->watch = qemu_chr_fe_add_watch(&s->chr, G_IO_HUP,
+ net_vhost_user_watch, s);
+ if (vhost_user_start(queues, ncs, &s->chr) < 0) {
+ qemu_chr_fe_disconnect(&s->chr);
+ return;
+ }
+ qmp_set_link(name, true, &err);
+ s->started = true;
break;
case CHR_EVENT_CLOSED:
- net_vhost_link_down(s, true);
- vhost_user_stop(s);
- error_report("chardev \"%s\" went down", s->nc.info_str);
+ qmp_set_link(name, false, &err);
+ vhost_user_stop(queues, ncs);
+ g_source_remove(s->watch);
+ s->watch = 0;
break;
}
+
+ if (err) {
+ error_report_err(err);
+ }
}
static int net_vhost_user_init(NetClientState *peer, const char *device,
const char *name, CharDriverState *chr,
- uint32_t queues)
+ int queues)
{
- NetClientState *nc;
+ Error *err = NULL;
+ NetClientState *nc, *nc0 = NULL;
VhostUserState *s;
int i;
+ assert(name);
+ assert(queues > 0);
+
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",
i, chr->label);
+ nc->queue_index = i;
+ if (!nc0) {
+ nc0 = nc;
+ s = DO_UPCAST(VhostUserState, nc, nc);
+ if (!qemu_chr_fe_init(&s->chr, chr, &err)) {
+ error_report_err(err);
+ return -1;
+ }
+ }
- s = DO_UPCAST(VhostUserState, nc, nc);
+ }
- /* We don't provide a receive callback */
- s->nc.receive_disabled = 1;
- s->chr = chr;
- s->nc.queue_index = i;
+ s = DO_UPCAST(VhostUserState, nc, nc0);
+ do {
+ if (qemu_chr_fe_wait_connected(&s->chr, &err) < 0) {
+ error_report_err(err);
+ return -1;
+ }
+ qemu_chr_fe_set_handlers(&s->chr, NULL, NULL,
+ net_vhost_user_event, nc0->name, NULL, true);
+ } while (!s->started);
- qemu_chr_add_handlers(s->chr, NULL, NULL, net_vhost_user_event, s);
- }
- return 0;
-}
+ assert(s->vhost_net);
-static int net_vhost_chardev_opts(void *opaque,
- const char *name, const char *value,
- Error **errp)
-{
- VhostUserChardevProps *props = opaque;
-
- if (strcmp(name, "backend") == 0 && strcmp(value, "socket") == 0) {
- props->is_socket = true;
- } else if (strcmp(name, "path") == 0) {
- props->is_unix = true;
- } else if (strcmp(name, "server") == 0) {
- props->is_server = true;
- } else {
- error_setg(errp,
- "vhost-user does not support a chardev with option %s=%s",
- name, value);
- return -1;
- }
return 0;
}
-static CharDriverState *net_vhost_parse_chardev(
+static CharDriverState *net_vhost_claim_chardev(
const NetdevVhostUserOptions *opts, Error **errp)
{
CharDriverState *chr = qemu_chr_find(opts->chardev);
- VhostUserChardevProps props;
if (chr == NULL) {
error_setg(errp, "chardev \"%s\" not found", opts->chardev);
return NULL;
}
- /* inspect chardev opts */
- memset(&props, 0, sizeof(props));
- if (qemu_opt_foreach(chr->opts, net_vhost_chardev_opts, &props, errp)) {
+ if (!qemu_chr_has_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE)) {
+ error_setg(errp, "chardev \"%s\" is not reconnectable",
+ opts->chardev);
return NULL;
}
-
- if (!props.is_socket || !props.is_unix) {
- error_setg(errp, "chardev \"%s\" is not a unix socket",
+ if (!qemu_chr_has_feature(chr, QEMU_CHAR_FEATURE_FD_PASS)) {
+ error_setg(errp, "chardev \"%s\" does not support FD passing",
opts->chardev);
return NULL;
}
- qemu_chr_fe_claim_no_fail(chr);
-
return chr;
}
{
const char *name = opaque;
const char *driver, *netdev;
- const char virtio_name[] = "virtio-net-";
driver = qemu_opt_get(opts, "driver");
netdev = qemu_opt_get(opts, "netdev");
}
if (strcmp(netdev, name) == 0 &&
- strncmp(driver, virtio_name, strlen(virtio_name)) != 0) {
+ !g_str_has_prefix(driver, "virtio-net-")) {
error_setg(errp, "vhost-user requires frontend driver virtio-net-*");
return -1;
}
return 0;
}
-int net_init_vhost_user(const NetClientOptions *opts, const char *name,
+int net_init_vhost_user(const Netdev *netdev, const char *name,
NetClientState *peer, Error **errp)
{
- uint32_t queues;
+ int queues;
const NetdevVhostUserOptions *vhost_user_opts;
CharDriverState *chr;
- assert(opts->kind == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
- vhost_user_opts = opts->vhost_user;
+ assert(netdev->type == NET_CLIENT_DRIVER_VHOST_USER);
+ vhost_user_opts = &netdev->u.vhost_user;
- chr = net_vhost_parse_chardev(vhost_user_opts, errp);
+ chr = net_vhost_claim_chardev(vhost_user_opts, errp);
if (!chr) {
return -1;
}
return -1;
}
- /* number of queues for multiqueue */
- if (vhost_user_opts->has_queues) {
- queues = vhost_user_opts->queues;
- } else {
- queues = 1;
+ queues = vhost_user_opts->has_queues ? vhost_user_opts->queues : 1;
+ if (queues < 1 || queues > MAX_QUEUE_NUM) {
+ error_setg(errp,
+ "vhost-user number of queues must be in range [1, %d]",
+ MAX_QUEUE_NUM);
+ return -1;
}
return net_vhost_user_init(peer, "vhost_user", name, chr, queues);
projects / mirror_qemu.git / blobdiff