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-rw-r--r--qemu/net/vhost-user.c331
1 files changed, 0 insertions, 331 deletions
diff --git a/qemu/net/vhost-user.c b/qemu/net/vhost-user.c
deleted file mode 100644
index 1b9e73a2d..000000000
--- a/qemu/net/vhost-user.c
+++ /dev/null
@@ -1,331 +0,0 @@
-/*
- * vhost-user.c
- *
- * Copyright (c) 2013 Virtual Open Systems Sarl.
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- *
- */
-
-#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;
- VHostNetState *vhost_net;
-} VhostUserState;
-
-typedef struct VhostUserChardevProps {
- bool is_socket;
- bool is_unix;
-} 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);
- return s->vhost_net;
-}
-
-static int vhost_user_running(VhostUserState *s)
-{
- return (s->vhost_net) ? 1 : 0;
-}
-
-static void vhost_user_stop(int queues, NetClientState *ncs[])
-{
- VhostUserState *s;
- int i;
-
- for (i = 0; i < queues; i++) {
- assert (ncs[i]->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
-
- s = DO_UPCAST(VhostUserState, nc, ncs[i]);
- if (!vhost_user_running(s)) {
- continue;
- }
-
- if (s->vhost_net) {
- vhost_net_cleanup(s->vhost_net);
- s->vhost_net = NULL;
- }
- }
-}
-
-static int vhost_user_start(int queues, NetClientState *ncs[])
-{
- VhostNetOptions options;
- VhostUserState *s;
- int max_queues;
- int i;
-
- options.backend_type = VHOST_BACKEND_TYPE_USER;
-
- for (i = 0; i < queues; i++) {
- assert (ncs[i]->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
-
- s = DO_UPCAST(VhostUserState, nc, ncs[i]);
- if (vhost_user_running(s)) {
- continue;
- }
-
- options.net_backend = ncs[i];
- options.opaque = s->chr;
- s->vhost_net = vhost_net_init(&options);
- if (!s->vhost_net) {
- error_report("failed to init vhost_net for queue %d", i);
- goto err;
- }
-
- if (i == 0) {
- max_queues = vhost_net_get_max_queues(s->vhost_net);
- if (queues > max_queues) {
- error_report("you are asking more queues than supported: %d",
- max_queues);
- goto err;
- }
- }
- }
-
- return 0;
-
-err:
- vhost_user_stop(i + 1, ncs);
- return -1;
-}
-
-static ssize_t vhost_user_receive(NetClientState *nc, const uint8_t *buf,
- size_t size)
-{
- /* 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;
- }
- }
-
- return size;
-}
-
-static void vhost_user_cleanup(NetClientState *nc)
-{
- VhostUserState *s = DO_UPCAST(VhostUserState, nc, nc);
-
- if (s->vhost_net) {
- vhost_net_cleanup(s->vhost_net);
- s->vhost_net = NULL;
- }
-
- qemu_purge_queued_packets(nc);
-}
-
-static bool vhost_user_has_vnet_hdr(NetClientState *nc)
-{
- assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
-
- return true;
-}
-
-static bool vhost_user_has_ufo(NetClientState *nc)
-{
- assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
-
- return true;
-}
-
-static NetClientInfo net_vhost_user_info = {
- .type = NET_CLIENT_OPTIONS_KIND_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_user_event(void *opaque, int event)
-{
- const char *name = opaque;
- NetClientState *ncs[MAX_QUEUE_NUM];
- VhostUserState *s;
- Error *err = NULL;
- int queues;
-
- queues = qemu_find_net_clients_except(name, ncs,
- NET_CLIENT_OPTIONS_KIND_NIC,
- MAX_QUEUE_NUM);
- assert(queues < MAX_QUEUE_NUM);
-
- s = DO_UPCAST(VhostUserState, nc, ncs[0]);
- trace_vhost_user_event(s->chr->label, event);
- switch (event) {
- case CHR_EVENT_OPENED:
- if (vhost_user_start(queues, ncs) < 0) {
- exit(1);
- }
- qmp_set_link(name, true, &err);
- break;
- case CHR_EVENT_CLOSED:
- qmp_set_link(name, false, &err);
- vhost_user_stop(queues, ncs);
- break;
- }
-
- if (err) {
- error_report_err(err);
- }
-}
-
-static int net_vhost_user_init(NetClientState *peer, const char *device,
- const char *name, CharDriverState *chr,
- int queues)
-{
- NetClientState *nc;
- 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;
-
- s = DO_UPCAST(VhostUserState, nc, nc);
- s->chr = chr;
- }
-
- qemu_chr_add_handlers(chr, NULL, NULL, net_vhost_user_event, nc[0].name);
-
- return 0;
-}
-
-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) {
- } 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(
- 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)) {
- return NULL;
- }
-
- if (!props.is_socket || !props.is_unix) {
- error_setg(errp, "chardev \"%s\" is not a unix socket",
- opts->chardev);
- return NULL;
- }
-
- qemu_chr_fe_claim_no_fail(chr);
-
- return chr;
-}
-
-static int net_vhost_check_net(void *opaque, QemuOpts *opts, Error **errp)
-{
- 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 (!driver || !netdev) {
- return 0;
- }
-
- if (strcmp(netdev, name) == 0 &&
- strncmp(driver, virtio_name, strlen(virtio_name)) != 0) {
- 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,
- NetClientState *peer, Error **errp)
-{
- int queues;
- const NetdevVhostUserOptions *vhost_user_opts;
- CharDriverState *chr;
-
- assert(opts->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
- vhost_user_opts = opts->u.vhost_user.data;
-
- chr = net_vhost_parse_chardev(vhost_user_opts, errp);
- if (!chr) {
- return -1;
- }
-
- /* verify net frontend */
- if (qemu_opts_foreach(qemu_find_opts("device"), net_vhost_check_net,
- (char *)name, errp)) {
- return -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);
-}