#define _FILE_OFFSET_BITS 64
#include "qemu/osdep.h"
+#include "qemu/atomic.h"
+#include "qemu/ctype.h"
#include "qemu/iov.h"
#include "standard-headers/linux/virtio_net.h"
-#include "contrib/libvhost-user/libvhost-user.h"
+#include "libvhost-user.h"
#define VHOST_USER_BRIDGE_DEBUG 1
} \
} while (0)
+enum {
+ VHOST_USER_BRIDGE_MAX_QUEUES = 8,
+};
+
typedef void (*CallbackFunc)(int sock, void *ctx);
typedef struct Event {
int sock;
int ready;
int quit;
+ struct {
+ int fd;
+ void *addr;
+ pthread_t thread;
+ } notifier;
} VubrDev;
static void
DPRINT(" hdrlen = %d\n", hdrlen);
if (!vu_queue_enabled(dev, vq) ||
+ !vu_queue_started(dev, vq) ||
!vu_queue_avail_bytes(dev, vq, hdrlen, 0)) {
DPRINT("Got UDP packet, but no available descriptors on RX virtq.\n");
return;
}
- do {
+ while (1) {
struct iovec *sg;
ssize_t ret, total = 0;
unsigned int num;
.msg_name = (struct sockaddr *) &vubr->backend_udp_dest,
.msg_namelen = sizeof(struct sockaddr_in),
.msg_iov = sg,
- .msg_iovlen = elem->in_num,
+ .msg_iovlen = num,
.msg_flags = MSG_DONTWAIT,
};
- do {
- ret = recvmsg(vubr->backend_udp_sock, &msg, 0);
- } while (ret == -1 && (errno == EINTR));
+ ret = RETRY_ON_EINTR(recvmsg(vubr->backend_udp_sock, &msg, 0));
if (i == 0) {
iov_restore_front(elem->in_sg, sg, hdrlen);
free(elem);
elem = NULL;
- } while (false); /* could loop if DONTWAIT worked? */
+
+ break; /* could loop if DONTWAIT worked? */
+ }
if (mhdr_cnt) {
mhdr.num_buffers = i;
vubr_get_features(VuDev *dev)
{
return 1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE |
- 1ULL << VIRTIO_NET_F_MRG_RXBUF;
+ 1ULL << VIRTIO_NET_F_MRG_RXBUF |
+ 1ULL << VIRTIO_F_VERSION_1;
}
static void
vubr_queue_set_started(VuDev *dev, int qidx, bool started)
{
+ VubrDev *vubr = container_of(dev, VubrDev, vudev);
VuVirtq *vq = vu_get_queue(dev, qidx);
+ if (started && vubr->notifier.fd >= 0) {
+ vu_set_queue_host_notifier(dev, vq, vubr->notifier.fd,
+ qemu_real_host_page_size(),
+ qidx * qemu_real_host_page_size());
+ }
+
if (qidx % 2 == 1) {
vu_set_queue_handler(dev, vq, started ? vubr_handle_tx : NULL);
}
}
DPRINT("Got connection from remote peer on sock %d\n", conn_fd);
- vu_init(&dev->vudev,
- conn_fd,
- vubr_panic,
- vubr_set_watch,
- vubr_remove_watch,
- &vuiface);
+ if (!vu_init(&dev->vudev,
+ VHOST_USER_BRIDGE_MAX_QUEUES,
+ conn_fd,
+ vubr_panic,
+ NULL,
+ vubr_set_watch,
+ vubr_remove_watch,
+ &vuiface)) {
+ fprintf(stderr, "Failed to initialize libvhost-user\n");
+ exit(1);
+ }
dispatcher_add(&dev->dispatcher, conn_fd, ctx, vubr_receive_cb);
dispatcher_remove(&dev->dispatcher, sock);
CallbackFunc cb;
size_t len;
+ if (strlen(path) >= sizeof(un.sun_path)) {
+ fprintf(stderr, "unix domain socket path '%s' is too long\n", path);
+ exit(1);
+ }
+
/* Get a UNIX socket. */
dev->sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (dev->sock == -1) {
vubr_die("socket");
}
+ dev->notifier.fd = -1;
+
un.sun_family = AF_UNIX;
strcpy(un.sun_path, path);
len = sizeof(un.sun_family) + strlen(path);
if (connect(dev->sock, (struct sockaddr *)&un, len) == -1) {
vubr_die("connect");
}
- vu_init(&dev->vudev,
- dev->sock,
- vubr_panic,
- vubr_set_watch,
- vubr_remove_watch,
- &vuiface);
+
+ if (!vu_init(&dev->vudev,
+ VHOST_USER_BRIDGE_MAX_QUEUES,
+ dev->sock,
+ vubr_panic,
+ NULL,
+ vubr_set_watch,
+ vubr_remove_watch,
+ &vuiface)) {
+ fprintf(stderr, "Failed to initialize libvhost-user\n");
+ exit(1);
+ }
+
cb = vubr_receive_cb;
}
return dev;
}
+static void *notifier_thread(void *arg)
+{
+ VuDev *dev = (VuDev *)arg;
+ VubrDev *vubr = container_of(dev, VubrDev, vudev);
+ int pagesize = qemu_real_host_page_size();
+ int qidx;
+
+ while (true) {
+ for (qidx = 0; qidx < VHOST_USER_BRIDGE_MAX_QUEUES; qidx++) {
+ uint16_t *n = vubr->notifier.addr + pagesize * qidx;
+
+ if (*n == qidx) {
+ *n = 0xffff;
+ /* We won't miss notifications if we reset
+ * the memory first. */
+ smp_mb();
+
+ DPRINT("Got a notification for queue%d via host notifier.\n",
+ qidx);
+
+ if (qidx % 2 == 1) {
+ vubr_handle_tx(dev, qidx);
+ }
+ }
+ usleep(1000);
+ }
+ }
+
+ return NULL;
+}
+
+static void
+vubr_host_notifier_setup(VubrDev *dev)
+{
+ pthread_t thread;
+ size_t length;
+ void *addr;
+ int fd;
+
+ length = qemu_real_host_page_size() * VHOST_USER_BRIDGE_MAX_QUEUES;
+
+ fd = g_file_open_tmp("vubr-XXXXXX", NULL, NULL);
+ if (fd < 0) {
+ vubr_die("mkstemp()");
+ }
+
+ if (posix_fallocate(fd, 0, length) != 0) {
+ vubr_die("posix_fallocate()");
+ }
+
+ addr = mmap(NULL, length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ if (addr == MAP_FAILED) {
+ vubr_die("mmap()");
+ }
+
+ memset(addr, 0xff, length);
+
+ if (pthread_create(&thread, NULL, notifier_thread, &dev->vudev) != 0) {
+ vubr_die("pthread_create()");
+ }
+
+ dev->notifier.fd = fd;
+ dev->notifier.addr = addr;
+ dev->notifier.thread = thread;
+}
+
static void
vubr_set_host(struct sockaddr_in *saddr, const char *host)
{
- if (isdigit(host[0])) {
+ if (qemu_isdigit(host[0])) {
if (!inet_aton(host, &saddr->sin_addr)) {
fprintf(stderr, "inet_aton() failed.\n");
exit(1);
VubrDev *dev;
int opt;
bool client = false;
+ bool host_notifier = false;
- while ((opt = getopt(argc, argv, "l:r:u:c")) != -1) {
+ while ((opt = getopt(argc, argv, "l:r:u:cH")) != -1) {
switch (opt) {
case 'l':
case 'c':
client = true;
break;
+ case 'H':
+ host_notifier = true;
+ break;
default:
goto out;
}
return 1;
}
+ if (host_notifier) {
+ vubr_host_notifier_setup(dev);
+ }
+
vubr_backend_udp_setup(dev, lhost, lport, rhost, rport);
vubr_run(dev);
out:
fprintf(stderr, "Usage: %s ", argv[0]);
- fprintf(stderr, "[-c] [-u ud_socket_path] [-l lhost:lport] [-r rhost:rport]\n");
- fprintf(stderr, "\t-u path to unix doman socket. default: %s\n",
+ fprintf(stderr, "[-c] [-H] [-u ud_socket_path] [-l lhost:lport] [-r rhost:rport]\n");
+ fprintf(stderr, "\t-u path to unix domain socket. default: %s\n",
DEFAULT_UD_SOCKET);
fprintf(stderr, "\t-l local host and port. default: %s:%s\n",
DEFAULT_LHOST, DEFAULT_LPORT);
fprintf(stderr, "\t-r remote host and port. default: %s:%s\n",
DEFAULT_RHOST, DEFAULT_RPORT);
fprintf(stderr, "\t-c client mode\n");
+ fprintf(stderr, "\t-H use host notifier\n");
return 1;
}
projects / mirror_qemu.git / blobdiff