#include <sys/socket.h>
#include <net/if.h>
+#include "net/eth.h"
#include "net/net.h"
#include "clients.h"
#include "monitor/monitor.h"
#include "sysemu/sysemu.h"
#include "qapi/error.h"
-#include "qemu-common.h"
#include "qemu/cutils.h"
#include "qemu/error-report.h"
+#include "qemu/main-loop.h"
#include "qemu/sockets.h"
#include "net/tap.h"
while (true) {
uint8_t *buf = s->buf;
+ uint8_t min_pkt[ETH_ZLEN];
+ size_t min_pktsz = sizeof(min_pkt);
size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
if (size <= 0) {
size -= s->host_vnet_hdr_len;
}
+ if (net_peer_needs_padding(&s->nc)) {
+ if (eth_pad_short_frame(min_pkt, &min_pktsz, buf, size)) {
+ buf = min_pkt;
+ size = min_pktsz;
+ }
+ }
+
size = qemu_send_packet_async(&s->nc, buf, size, tap_send_completed);
if (size == 0) {
tap_read_poll(s, false);
assert(nc->info->type == NET_CLIENT_DRIVER_TAP);
assert(len == sizeof(struct virtio_net_hdr_mrg_rxbuf) ||
- len == sizeof(struct virtio_net_hdr));
+ len == sizeof(struct virtio_net_hdr) ||
+ len == sizeof(struct virtio_net_hdr_v1_hash));
tap_fd_set_vnet_hdr_len(s->fd, len);
s->host_vnet_hdr_len = len;
tap_write_poll(s, enable);
}
+static bool tap_set_steering_ebpf(NetClientState *nc, int prog_fd)
+{
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
+ assert(nc->info->type == NET_CLIENT_DRIVER_TAP);
+
+ return tap_fd_set_steering_ebpf(s->fd, prog_fd) == 0;
+}
+
int tap_get_fd(NetClientState *nc)
{
TAPState *s = DO_UPCAST(TAPState, nc, nc);
.set_vnet_hdr_len = tap_set_vnet_hdr_len,
.set_vnet_le = tap_set_vnet_le,
.set_vnet_be = tap_set_vnet_be,
+ .set_steering_ebpf = tap_set_steering_ebpf,
};
static TAPState *net_tap_fd_init(NetClientState *peer,
Error **errp)
{
sigset_t oldmask, mask;
+ g_autofree char *default_helper = NULL;
int pid, status;
char *args[5];
char **parg;
sigaddset(&mask, SIGCHLD);
sigprocmask(SIG_BLOCK, &mask, &oldmask);
+ if (!helper) {
+ helper = default_helper = get_relocated_path(DEFAULT_BRIDGE_HELPER);
+ }
+
if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) {
error_setg_errno(errp, errno, "socketpair() failed");
return -1;
}
if (pid == 0) {
int open_max = sysconf(_SC_OPEN_MAX), i;
- char fd_buf[6+10];
- char br_buf[6+IFNAMSIZ] = {0};
- char helper_cmd[PATH_MAX + sizeof(fd_buf) + sizeof(br_buf) + 15];
+ char *fd_buf = NULL;
+ char *br_buf = NULL;
+ char *helper_cmd = NULL;
for (i = 3; i < open_max; i++) {
if (i != sv[1]) {
}
}
- snprintf(fd_buf, sizeof(fd_buf), "%s%d", "--fd=", sv[1]);
+ fd_buf = g_strdup_printf("%s%d", "--fd=", sv[1]);
if (strrchr(helper, ' ') || strrchr(helper, '\t')) {
/* assume helper is a command */
if (strstr(helper, "--br=") == NULL) {
- snprintf(br_buf, sizeof(br_buf), "%s%s", "--br=", bridge);
+ br_buf = g_strdup_printf("%s%s", "--br=", bridge);
}
- snprintf(helper_cmd, sizeof(helper_cmd), "%s %s %s %s",
- helper, "--use-vnet", fd_buf, br_buf);
+ helper_cmd = g_strdup_printf("%s %s %s %s", helper,
+ "--use-vnet", fd_buf, br_buf ? br_buf : "");
parg = args;
*parg++ = (char *)"sh";
*parg++ = NULL;
execv("/bin/sh", args);
+ g_free(helper_cmd);
} else {
/* assume helper is just the executable path name */
- snprintf(br_buf, sizeof(br_buf), "%s%s", "--br=", bridge);
+ br_buf = g_strdup_printf("%s%s", "--br=", bridge);
parg = args;
*parg++ = (char *)helper;
execv(helper, args);
}
+ g_free(fd_buf);
+ g_free(br_buf);
_exit(1);
} else {
assert(netdev->type == NET_CLIENT_DRIVER_BRIDGE);
bridge = &netdev->u.bridge;
-
- helper = bridge->has_helper ? bridge->helper : DEFAULT_BRIDGE_HELPER;
+ helper = bridge->has_helper ? bridge->helper : NULL;
br = bridge->has_br ? bridge->br : DEFAULT_BRIDGE_INTERFACE;
fd = net_bridge_run_helper(helper, br, errp);
}
qemu_set_nonblock(fd);
- vnet_hdr = tap_probe_vnet_hdr(fd);
+ vnet_hdr = tap_probe_vnet_hdr(fd, errp);
+ if (vnet_hdr < 0) {
+ close(fd);
+ return -1;
+ }
s = net_tap_fd_init(peer, "bridge", name, fd, vnet_hdr);
snprintf(s->nc.info_str, sizeof(s->nc.info_str), "helper=%s,br=%s", helper,
}
if (vhostfdname) {
- vhostfd = monitor_fd_param(cur_mon, vhostfdname, &err);
+ int ret;
+
+ vhostfd = monitor_fd_param(monitor_cur(), vhostfdname, &err);
if (vhostfd == -1) {
if (tap->has_vhostforce && tap->vhostforce) {
error_propagate(errp, err);
}
return;
}
- qemu_set_nonblock(vhostfd);
+ ret = qemu_try_set_nonblock(vhostfd);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
+ name, fd);
+ return;
+ }
} else {
vhostfd = open("/dev/vhost-net", O_RDWR);
if (vhostfd < 0) {
qemu_set_nonblock(vhostfd);
}
options.opaque = (void *)(uintptr_t)vhostfd;
+ options.nvqs = 2;
s->vhost_net = vhost_net_init(&options);
if (!s->vhost_net) {
const NetdevTapOptions *tap;
int fd, vnet_hdr = 0, i = 0, queues;
/* for the no-fd, no-helper case */
- const char *script = NULL; /* suppress wrong "uninit'd use" gcc warning */
- const char *downscript = NULL;
+ const char *script;
+ const char *downscript;
Error *err = NULL;
const char *vhostfdname;
char ifname[128];
+ int ret = 0;
assert(netdev->type == NET_CLIENT_DRIVER_TAP);
tap = &netdev->u.tap;
queues = tap->has_queues ? tap->queues : 1;
vhostfdname = tap->has_vhostfd ? tap->vhostfd : NULL;
+ script = tap->has_script ? tap->script : NULL;
+ downscript = tap->has_downscript ? tap->downscript : NULL;
/* QEMU hubs do not support multiqueue tap, in this case peer is set.
* For -netdev, peer is always NULL. */
return -1;
}
- fd = monitor_fd_param(cur_mon, tap->fd, &err);
+ fd = monitor_fd_param(monitor_cur(), tap->fd, errp);
if (fd == -1) {
- error_propagate(errp, err);
return -1;
}
- qemu_set_nonblock(fd);
+ ret = qemu_try_set_nonblock(fd);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
+ name, fd);
+ close(fd);
+ return -1;
+ }
- vnet_hdr = tap_probe_vnet_hdr(fd);
+ vnet_hdr = tap_probe_vnet_hdr(fd, errp);
+ if (vnet_hdr < 0) {
+ close(fd);
+ return -1;
+ }
net_init_tap_one(tap, peer, "tap", name, NULL,
script, downscript,
vhostfdname, vnet_hdr, fd, &err);
if (err) {
error_propagate(errp, err);
+ close(fd);
return -1;
}
} else if (tap->has_fds) {
char **fds;
char **vhost_fds;
int nfds = 0, nvhosts = 0;
- int ret = 0;
if (tap->has_ifname || tap->has_script || tap->has_downscript ||
tap->has_vnet_hdr || tap->has_helper || tap->has_queues ||
}
for (i = 0; i < nfds; i++) {
- fd = monitor_fd_param(cur_mon, fds[i], &err);
+ fd = monitor_fd_param(monitor_cur(), fds[i], errp);
if (fd == -1) {
- error_propagate(errp, err);
ret = -1;
goto free_fail;
}
- qemu_set_nonblock(fd);
+ ret = qemu_try_set_nonblock(fd);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
+ name, fd);
+ goto free_fail;
+ }
if (i == 0) {
- vnet_hdr = tap_probe_vnet_hdr(fd);
- } else if (vnet_hdr != tap_probe_vnet_hdr(fd)) {
+ vnet_hdr = tap_probe_vnet_hdr(fd, errp);
+ if (vnet_hdr < 0) {
+ ret = -1;
+ goto free_fail;
+ }
+ } else if (vnet_hdr != tap_probe_vnet_hdr(fd, NULL)) {
error_setg(errp,
"vnet_hdr not consistent across given tap fds");
ret = -1;
}
qemu_set_nonblock(fd);
- vnet_hdr = tap_probe_vnet_hdr(fd);
+ vnet_hdr = tap_probe_vnet_hdr(fd, errp);
+ if (vnet_hdr < 0) {
+ close(fd);
+ return -1;
+ }
net_init_tap_one(tap, peer, "bridge", name, ifname,
script, downscript, vhostfdname,
return -1;
}
} else {
+ g_autofree char *default_script = NULL;
+ g_autofree char *default_downscript = NULL;
if (tap->has_vhostfds) {
error_setg(errp, "vhostfds= is invalid if fds= wasn't specified");
return -1;
}
- script = tap->has_script ? tap->script : DEFAULT_NETWORK_SCRIPT;
- downscript = tap->has_downscript ? tap->downscript :
- DEFAULT_NETWORK_DOWN_SCRIPT;
+
+ if (!script) {
+ script = default_script = get_relocated_path(DEFAULT_NETWORK_SCRIPT);
+ }
+ if (!downscript) {
+ downscript = default_downscript =
+ get_relocated_path(DEFAULT_NETWORK_DOWN_SCRIPT);
+ }
if (tap->has_ifname) {
pstrcpy(ifname, sizeof ifname, tap->ifname);
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