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Port -net none and -net nic to QemuOpts
We use a table of network types to look up the initialization function and parameter descriptions in net_client_init(). For now, we use QemuOpts for the 'none' and 'nic' types. Subsequent patches port the other types too and the special casing is removed. We're not parsing the full -net option string here as the type has been stripped from the string, so we do not use qemu_opts_parse() 'firstname' facility. This will also be rectified in subsequent patches. No functional changes are introduced by this patch. Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Mark McLoughlin
Anthony Liguori
parent
8119b33d18
commit
f83c6e1085
237
net.c
237
net.c
@ -110,6 +110,7 @@
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#include "audio/audio.h"
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#include "qemu_socket.h"
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#include "qemu-log.h"
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#include "qemu-config.h"
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#include "slirp/libslirp.h"
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#include "qemu-queue.h"
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@ -2400,6 +2401,151 @@ static int net_handle_fd_param(Monitor *mon, const char *param)
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}
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}
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static int net_init_nic(QemuOpts *opts, Monitor *mon)
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{
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int idx;
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NICInfo *nd;
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idx = nic_get_free_idx();
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if (idx == -1 || nb_nics >= MAX_NICS) {
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qemu_error("Too Many NICs\n");
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return -1;
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}
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nd = &nd_table[idx];
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memset(nd, 0, sizeof(*nd));
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nd->vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1);
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if (qemu_opts_id(opts)) {
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nd->id = qemu_strdup(qemu_opts_id(opts));
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}
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if (qemu_opt_get(opts, "name")) {
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nd->name = qemu_strdup(qemu_opt_get(opts, "name"));
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}
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if (qemu_opt_get(opts, "model")) {
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nd->model = qemu_strdup(qemu_opt_get(opts, "model"));
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}
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if (qemu_opt_get(opts, "addr")) {
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nd->devaddr = qemu_strdup(qemu_opt_get(opts, "addr"));
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}
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nd->macaddr[0] = 0x52;
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nd->macaddr[1] = 0x54;
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nd->macaddr[2] = 0x00;
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nd->macaddr[3] = 0x12;
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nd->macaddr[4] = 0x34;
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nd->macaddr[5] = 0x56 + idx;
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if (qemu_opt_get(opts, "macaddr") &&
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parse_macaddr(nd->macaddr, qemu_opt_get(opts, "macaddr")) < 0) {
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qemu_error("invalid syntax for ethernet address\n");
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return -1;
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}
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nd->nvectors = qemu_opt_get_number(opts, "vectors", NIC_NVECTORS_UNSPECIFIED);
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if (nd->nvectors != NIC_NVECTORS_UNSPECIFIED &&
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(nd->nvectors < 0 || nd->nvectors > 0x7ffffff)) {
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qemu_error("invalid # of vectors: %d\n", nd->nvectors);
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return -1;
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}
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nd->used = 1;
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nd->vlan->nb_guest_devs++;
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nb_nics++;
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return idx;
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}
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#define NET_COMMON_PARAMS_DESC \
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{ \
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.name = "type", \
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.type = QEMU_OPT_STRING, \
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.help = "net client type (nic, tap etc.)", \
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}, { \
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.name = "vlan", \
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.type = QEMU_OPT_NUMBER, \
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.help = "vlan number", \
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}, { \
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.name = "name", \
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.type = QEMU_OPT_STRING, \
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.help = "identifier for monitor commands", \
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}
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typedef int (*net_client_init_func)(QemuOpts *opts, Monitor *mon);
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/* magic number, but compiler will warn if too small */
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#define NET_MAX_DESC 20
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static struct {
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const char *type;
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net_client_init_func init;
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QemuOptDesc desc[NET_MAX_DESC];
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} net_client_types[] = {
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{
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.type = "none",
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.desc = {
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NET_COMMON_PARAMS_DESC,
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{ /* end of list */ }
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},
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}, {
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.type = "nic",
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.init = net_init_nic,
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.desc = {
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NET_COMMON_PARAMS_DESC,
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{
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.name = "macaddr",
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.type = QEMU_OPT_STRING,
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.help = "MAC address",
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}, {
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.name = "model",
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.type = QEMU_OPT_STRING,
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.help = "device model (e1000, rtl8139, virtio etc.)",
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}, {
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.name = "addr",
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.type = QEMU_OPT_STRING,
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.help = "PCI device address",
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}, {
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.name = "vectors",
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.type = QEMU_OPT_NUMBER,
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.help = "number of MSI-x vectors, 0 to disable MSI-X",
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},
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{ /* end of list */ }
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},
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},
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{ /* end of list */ }
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};
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static int net_client_init_from_opts(Monitor *mon, QemuOpts *opts)
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{
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const char *type;
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int i;
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type = qemu_opt_get(opts, "type");
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if (!type) {
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qemu_error("No type specified for -net\n");
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return -1;
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}
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for (i = 0; net_client_types[i].type != NULL; i++) {
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if (!strcmp(net_client_types[i].type, type)) {
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if (qemu_opts_validate(opts, &net_client_types[i].desc[0]) == -1) {
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return -1;
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}
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if (net_client_types[i].init) {
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return net_client_types[i].init(opts, NULL);
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} else {
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return 0;
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}
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}
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}
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qemu_error("Invalid -net type '%s'\n", type);
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return -1;
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}
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int net_client_init(Monitor *mon, const char *device, const char *p)
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{
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char buf[1024];
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@ -2407,6 +2553,20 @@ int net_client_init(Monitor *mon, const char *device, const char *p)
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VLANState *vlan;
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char *name = NULL;
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if (!strcmp(device, "none") ||
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!strcmp(device, "nic")) {
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QemuOpts *opts;
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opts = qemu_opts_parse(&qemu_net_opts, p, NULL);
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if (!opts) {
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return -1;
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}
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qemu_opt_set(opts, "type", device);
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return net_client_init_from_opts(mon, opts);
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}
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vlan_id = 0;
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if (get_param_value(buf, sizeof(buf), "vlan", p)) {
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vlan_id = strtol(buf, NULL, 0);
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@ -2416,84 +2576,7 @@ int net_client_init(Monitor *mon, const char *device, const char *p)
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if (get_param_value(buf, sizeof(buf), "name", p)) {
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name = qemu_strdup(buf);
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}
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if (!strcmp(device, "nic")) {
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static const char * const nic_params[] = {
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"vlan", "name", "macaddr", "model", "addr", "id", "vectors", NULL
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};
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NICInfo *nd;
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uint8_t *macaddr;
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int idx = nic_get_free_idx();
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if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
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qemu_error("invalid parameter '%s' in '%s'\n", buf, p);
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ret = -1;
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goto out;
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}
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if (idx == -1 || nb_nics >= MAX_NICS) {
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qemu_error("Too Many NICs\n");
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ret = -1;
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goto out;
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}
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nd = &nd_table[idx];
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memset(nd, 0, sizeof(*nd));
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macaddr = nd->macaddr;
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macaddr[0] = 0x52;
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macaddr[1] = 0x54;
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macaddr[2] = 0x00;
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macaddr[3] = 0x12;
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macaddr[4] = 0x34;
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macaddr[5] = 0x56 + idx;
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if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
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if (parse_macaddr(macaddr, buf) < 0) {
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qemu_error("invalid syntax for ethernet address\n");
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ret = -1;
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goto out;
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}
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}
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if (get_param_value(buf, sizeof(buf), "model", p)) {
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nd->model = qemu_strdup(buf);
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}
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if (get_param_value(buf, sizeof(buf), "addr", p)) {
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nd->devaddr = qemu_strdup(buf);
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}
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if (get_param_value(buf, sizeof(buf), "id", p)) {
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nd->id = qemu_strdup(buf);
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}
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nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
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if (get_param_value(buf, sizeof(buf), "vectors", p)) {
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char *endptr;
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long vectors = strtol(buf, &endptr, 0);
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if (*endptr) {
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qemu_error("invalid syntax for # of vectors\n");
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ret = -1;
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goto out;
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}
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if (vectors < 0 || vectors > 0x7ffffff) {
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qemu_error("invalid # of vectors\n");
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ret = -1;
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goto out;
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}
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nd->nvectors = vectors;
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}
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nd->vlan = vlan;
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nd->name = name;
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nd->used = 1;
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name = NULL;
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nb_nics++;
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vlan->nb_guest_devs++;
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ret = idx;
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} else
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if (!strcmp(device, "none")) {
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if (*p != '\0') {
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qemu_error("'none' takes no parameters\n");
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ret = -1;
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goto out;
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}
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/* does nothing. It is needed to signal that no network cards
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are wanted */
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ret = 0;
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} else
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#ifdef CONFIG_SLIRP
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if (!strcmp(device, "user")) {
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static const char * const slirp_params[] = {
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