int net_init_tap(QemuOpts *opts, const char *name, VLANState *vlan)
{
TAPState *s;
int fd, vnet_hdr = 0;
const char *model;
if (qemu_opt_get(opts, "fd")) {
if (qemu_opt_get(opts, "ifname") ||
qemu_opt_get(opts, "script") ||
qemu_opt_get(opts, "downscript") ||
qemu_opt_get(opts, "vnet_hdr") ||
qemu_opt_get(opts, "helper")) {
error_report("ifname=, script=, downscript=, vnet_hdr=, "
"and helper= are invalid with fd=");
return -1;
}
fd = net_handle_fd_param(cur_mon, qemu_opt_get(opts, "fd"));
if (fd == -1) {
return -1;
}
fcntl(fd, F_SETFL, O_NONBLOCK);
vnet_hdr = tap_probe_vnet_hdr(fd);
model = "tap";
} else if (qemu_opt_get(opts, "helper")) {
if (qemu_opt_get(opts, "ifname") ||
qemu_opt_get(opts, "script") ||
qemu_opt_get(opts, "downscript") ||
qemu_opt_get(opts, "vnet_hdr")) {
error_report("ifname=, script=, downscript=, and vnet_hdr= "
"are invalid with helper=");
return -1;
}
fd = net_bridge_run_helper(qemu_opt_get(opts, "helper"),
DEFAULT_BRIDGE_INTERFACE);
if (fd == -1) {
return -1;
}
fcntl(fd, F_SETFL, O_NONBLOCK);
vnet_hdr = tap_probe_vnet_hdr(fd);
model = "bridge";
} else {
if (!qemu_opt_get(opts, "script")) {
qemu_opt_set(opts, "script", DEFAULT_NETWORK_SCRIPT);
}
if (!qemu_opt_get(opts, "downscript")) {
qemu_opt_set(opts, "downscript", DEFAULT_NETWORK_DOWN_SCRIPT);
}
fd = net_tap_init(opts, &vnet_hdr);
if (fd == -1) {
return -1;
}
model = "tap";
}
s = net_tap_fd_init(vlan, model, name, fd, vnet_hdr);
if (!s) {
close(fd);
return -1;
}
if (tap_set_sndbuf(s->fd, opts) < 0) {
return -1;
}
if (qemu_opt_get(opts, "fd")) {
snprintf(s->nc.info_str, sizeof(s->nc.info_str), "fd=%d", fd);
} else if (qemu_opt_get(opts, "helper")) {
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
"helper=%s", qemu_opt_get(opts, "helper"));
} else {
const char *ifname, *script, *downscript;
ifname = qemu_opt_get(opts, "ifname");
script = qemu_opt_get(opts, "script");
downscript = qemu_opt_get(opts, "downscript");
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
"ifname=%s,script=%s,downscript=%s",
ifname, script, downscript);
if (strcmp(downscript, "no") != 0) {
snprintf(s->down_script, sizeof(s->down_script), "%s", downscript);
snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
}
}
if (qemu_opt_get_bool(opts, "vhost", !!qemu_opt_get(opts, "vhostfd") ||
qemu_opt_get_bool(opts, "vhostforce", false))) {
int vhostfd, r;
bool force = qemu_opt_get_bool(opts, "vhostforce", false);
if (qemu_opt_get(opts, "vhostfd")) {
r = net_handle_fd_param(cur_mon, qemu_opt_get(opts, "vhostfd"));
if (r == -1) {
return -1;
}
vhostfd = r;
} else {
vhostfd = -1;
}
s->vhost_net = vhost_net_init(&s->nc, vhostfd, force);
if (!s->vhost_net) {
error_report("vhost-net requested but could not be initialized");
return -1;
}
} else if (qemu_opt_get(opts, "vhostfd")) {
error_report("vhostfd= is not valid without vhost");
return -1;
}
return 0;
}
int net_init_tap(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan)
{
TAPState *s;
int fd, vnet_hdr = 0;
if (qemu_opt_get(opts, "fd")) {
if (qemu_opt_get(opts, "ifname") ||
qemu_opt_get(opts, "script") ||
qemu_opt_get(opts, "downscript") ||
qemu_opt_get(opts, "vnet_hdr")) {
qemu_error("ifname=, script=, downscript= and vnet_hdr= is invalid with fd=\n");
return -1;
}
fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
if (fd == -1) {
return -1;
}
fcntl(fd, F_SETFL, O_NONBLOCK);
vnet_hdr = tap_probe_vnet_hdr(fd);
} else {
if (!qemu_opt_get(opts, "script")) {
qemu_opt_set(opts, "script", DEFAULT_NETWORK_SCRIPT);
}
if (!qemu_opt_get(opts, "downscript")) {
qemu_opt_set(opts, "downscript", DEFAULT_NETWORK_DOWN_SCRIPT);
}
fd = net_tap_init(opts, &vnet_hdr);
if (fd == -1) {
return -1;
}
}
s = net_tap_fd_init(vlan, "tap", name, fd, vnet_hdr);
if (!s) {
close(fd);
return -1;
}
if (tap_set_sndbuf(s->fd, opts) < 0) {
return -1;
}
if (qemu_opt_get(opts, "fd")) {
snprintf(s->nc.info_str, sizeof(s->nc.info_str), "fd=%d", fd);
} else {
const char *ifname, *script, *downscript;
ifname = qemu_opt_get(opts, "ifname");
script = qemu_opt_get(opts, "script");
downscript = qemu_opt_get(opts, "downscript");
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
"ifname=%s,script=%s,downscript=%s",
ifname, script, downscript);
if (strcmp(downscript, "no") != 0) {
snprintf(s->down_script, sizeof(s->down_script), "%s", downscript);
snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
}
}
return 0;
}
int net_init_tap(const NetClientOptions *opts, const char *name,
NetClientState *peer)
{
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 *vhostfdname;
char ifname[128];
assert(opts->kind == NET_CLIENT_OPTIONS_KIND_TAP);
tap = opts->tap;
queues = tap->has_queues ? tap->queues : 1;
vhostfdname = tap->has_vhostfd ? tap->vhostfd : NULL;
/* QEMU vlans does not support multiqueue tap, in this case peer is set.
* For -netdev, peer is always NULL. */
if (peer && (tap->has_queues || tap->has_fds || tap->has_vhostfds)) {
error_report("Multiqueue tap cannot be used with QEMU vlans");
return -1;
}
if (tap->has_fd) {
if (tap->has_ifname || tap->has_script || tap->has_downscript ||
tap->has_vnet_hdr || tap->has_helper || tap->has_queues ||
tap->has_fds || tap->has_vhostfds) {
error_report("ifname=, script=, downscript=, vnet_hdr=, "
"helper=, queues=, fds=, and vhostfds= "
"are invalid with fd=");
return -1;
}
fd = monitor_handle_fd_param(cur_mon, tap->fd);
if (fd == -1) {
return -1;
}
fcntl(fd, F_SETFL, O_NONBLOCK);
vnet_hdr = tap_probe_vnet_hdr(fd);
if (net_init_tap_one(tap, peer, "tap", name, NULL,
script, downscript,
vhostfdname, vnet_hdr, fd)) {
return -1;
}
} else if (tap->has_fds) {
char *fds[MAX_TAP_QUEUES];
char *vhost_fds[MAX_TAP_QUEUES];
int nfds, nvhosts;
if (tap->has_ifname || tap->has_script || tap->has_downscript ||
tap->has_vnet_hdr || tap->has_helper || tap->has_queues ||
tap->has_vhostfd) {
error_report("ifname=, script=, downscript=, vnet_hdr=, "
"helper=, queues=, and vhostfd= "
"are invalid with fds=");
return -1;
}
nfds = get_fds(tap->fds, fds, MAX_TAP_QUEUES);
if (tap->has_vhostfds) {
nvhosts = get_fds(tap->vhostfds, vhost_fds, MAX_TAP_QUEUES);
if (nfds != nvhosts) {
error_report("The number of fds passed does not match the "
"number of vhostfds passed");
return -1;
}
}
for (i = 0; i < nfds; i++) {
fd = monitor_handle_fd_param(cur_mon, fds[i]);
if (fd == -1) {
return -1;
}
fcntl(fd, F_SETFL, O_NONBLOCK);
if (i == 0) {
vnet_hdr = tap_probe_vnet_hdr(fd);
} else if (vnet_hdr != tap_probe_vnet_hdr(fd)) {
error_report("vnet_hdr not consistent across given tap fds");
return -1;
}
if (net_init_tap_one(tap, peer, "tap", name, ifname,
script, downscript,
tap->has_vhostfds ? vhost_fds[i] : NULL,
vnet_hdr, fd)) {
return -1;
}
}
} else if (tap->has_helper) {
if (tap->has_ifname || tap->has_script || tap->has_downscript ||
tap->has_vnet_hdr || tap->has_queues || tap->has_vhostfds) {
error_report("ifname=, script=, downscript=, and vnet_hdr= "
"queues=, and vhostfds= are invalid with helper=");
return -1;
}
fd = net_bridge_run_helper(tap->helper, DEFAULT_BRIDGE_INTERFACE);
if (fd == -1) {
return -1;
}
fcntl(fd, F_SETFL, O_NONBLOCK);
vnet_hdr = tap_probe_vnet_hdr(fd);
if (net_init_tap_one(tap, peer, "bridge", name, ifname,
script, downscript, vhostfdname,
vnet_hdr, fd)) {
return -1;
}
} else {
if (tap->has_vhostfds) {
error_report("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 (tap->has_ifname) {
pstrcpy(ifname, sizeof ifname, tap->ifname);
} else {
ifname[0] = '\0';
}
for (i = 0; i < queues; i++) {
fd = net_tap_init(tap, &vnet_hdr, i >= 1 ? "no" : script,
ifname, sizeof ifname, queues > 1);
if (fd == -1) {
return -1;
}
if (queues > 1 && i == 0 && !tap->has_ifname) {
if (tap_fd_get_ifname(fd, ifname)) {
error_report("Fail to get ifname");
return -1;
}
}
if (net_init_tap_one(tap, peer, "tap", name, ifname,
i >= 1 ? "no" : script,
i >= 1 ? "no" : downscript,
vhostfdname, vnet_hdr, fd)) {
return -1;
}
}
}
return 0;
}
int net_init_tap(const NetClientOptions *opts, const char *name,
VLANState *vlan)
{
const NetdevTapOptions *tap;
int fd, vnet_hdr = 0;
const char *model;
TAPState *s;
/* for the no-fd, no-helper case */
const char *script = NULL; /* suppress wrong "uninit'd use" gcc warning */
char ifname[128];
assert(opts->kind == NET_CLIENT_OPTIONS_KIND_TAP);
tap = opts->tap;
if (tap->has_fd) {
if (tap->has_ifname || tap->has_script || tap->has_downscript ||
tap->has_vnet_hdr || tap->has_helper) {
error_report("ifname=, script=, downscript=, vnet_hdr=, "
"and helper= are invalid with fd=");
return -1;
}
fd = net_handle_fd_param(cur_mon, tap->fd);
if (fd == -1) {
return -1;
}
fcntl(fd, F_SETFL, O_NONBLOCK);
vnet_hdr = tap_probe_vnet_hdr(fd);
model = "tap";
} else if (tap->has_helper) {
if (tap->has_ifname || tap->has_script || tap->has_downscript ||
tap->has_vnet_hdr) {
error_report("ifname=, script=, downscript=, and vnet_hdr= "
"are invalid with helper=");
return -1;
}
fd = net_bridge_run_helper(tap->helper, DEFAULT_BRIDGE_INTERFACE);
if (fd == -1) {
return -1;
}
fcntl(fd, F_SETFL, O_NONBLOCK);
vnet_hdr = tap_probe_vnet_hdr(fd);
model = "bridge";
} else {
script = tap->has_script ? tap->script : DEFAULT_NETWORK_SCRIPT;
fd = net_tap_init(tap, &vnet_hdr, script, ifname, sizeof ifname);
if (fd == -1) {
return -1;
}
model = "tap";
}
s = net_tap_fd_init(vlan, model, name, fd, vnet_hdr);
if (!s) {
close(fd);
return -1;
}
if (tap_set_sndbuf(s->fd, tap) < 0) {
return -1;
}
if (tap->has_fd) {
snprintf(s->nc.info_str, sizeof(s->nc.info_str), "fd=%d", fd);
} else if (tap->has_helper) {
snprintf(s->nc.info_str, sizeof(s->nc.info_str), "helper=%s",
tap->helper);
} else {
const char *downscript;
downscript = tap->has_downscript ? tap->downscript :
DEFAULT_NETWORK_DOWN_SCRIPT;
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
"ifname=%s,script=%s,downscript=%s", ifname, script,
downscript);
if (strcmp(downscript, "no") != 0) {
snprintf(s->down_script, sizeof(s->down_script), "%s", downscript);
snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
}
}
if (tap->has_vhost ? tap->vhost :
tap->has_vhostfd || (tap->has_vhostforce && tap->vhostforce)) {
int vhostfd;
if (tap->has_vhostfd) {
vhostfd = net_handle_fd_param(cur_mon, tap->vhostfd);
if (vhostfd == -1) {
return -1;
}
} else {
vhostfd = -1;
}
s->vhost_net = vhost_net_init(&s->nc, vhostfd,
tap->has_vhostforce && tap->vhostforce);
if (!s->vhost_net) {
error_report("vhost-net requested but could not be initialized");
return -1;
}
} else if (tap->has_vhostfd) {
error_report("vhostfd= is not valid without vhost");
return -1;
}
return 0;
}