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net: report list of available models according to platform

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By noting the models for which a configuration was requested, we can give
the user an accurate list of which NIC models were actually available on
the platform/configuration that was otherwise chosen.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
David Woodhouse 2023-10-21 23:09:38 +01:00
parent 93e9d7301e
commit 2cdeca04ad
1 changed files with 94 additions and 0 deletions
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94
net/net.c
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@ -75,6 +75,8 @@ typedef QSIMPLEQ_HEAD(, NetdevQueueEntry) NetdevQueue;
static NetdevQueue nd_queue = QSIMPLEQ_HEAD_INITIALIZER(nd_queue);
static GHashTable *nic_model_help;
/***********************************************************/
/* network device redirectors */
@ -1087,12 +1089,94 @@ static int net_init_nic(const Netdev *netdev, const char *name,
return idx;
}
static gboolean add_nic_result(gpointer key, gpointer value, gpointer user_data)
{
GPtrArray *results = user_data;
GPtrArray *alias_list = value;
const char *model = key;
char *result;
if (!alias_list) {
result = g_strdup(model);
} else {
GString *result_str = g_string_new(model);
int i;
g_string_append(result_str, " (aka ");
for (i = 0; i < alias_list->len; i++) {
if (i) {
g_string_append(result_str, ", ");
}
g_string_append(result_str, alias_list->pdata[i]);
}
g_string_append(result_str, ")");
result = result_str->str;
g_string_free(result_str, false);
g_ptr_array_unref(alias_list);
}
g_ptr_array_add(results, result);
return true;
}
static int model_cmp(char **a, char **b)
{
return strcmp(*a, *b);
}
static void show_nic_models(void)
{
GPtrArray *results = g_ptr_array_new();
int i;
g_hash_table_foreach_remove(nic_model_help, add_nic_result, results);
g_ptr_array_sort(results, (GCompareFunc)model_cmp);
printf("Available NIC models for this configuration:\n");
for (i = 0 ; i < results->len; i++) {
printf("%s\n", (char *)results->pdata[i]);
}
g_hash_table_unref(nic_model_help);
nic_model_help = NULL;
}
static void add_nic_model_help(const char *model, const char *alias)
{
GPtrArray *alias_list = NULL;
if (g_hash_table_lookup_extended(nic_model_help, model, NULL,
(gpointer *)&alias_list)) {
/* Already exists, no alias to add: return */
if (!alias) {
return;
}
if (alias_list) {
/* Check if this alias is already in the list. Add if not. */
if (!g_ptr_array_find_with_equal_func(alias_list, alias,
g_str_equal, NULL)) {
g_ptr_array_add(alias_list, g_strdup(alias));
}
return;
}
}
/* Either this model wasn't in the list already, or a first alias added */
if (alias) {
alias_list = g_ptr_array_new();
g_ptr_array_set_free_func(alias_list, g_free);
g_ptr_array_add(alias_list, g_strdup(alias));
}
g_hash_table_replace(nic_model_help, g_strdup(model), alias_list);
}
NICInfo *qemu_find_nic_info(const char *typename, bool match_default,
const char *alias)
{
NICInfo *nd;
int i;
if (nic_model_help) {
add_nic_model_help(typename, alias);
}
for (i = 0; i < nb_nics; i++) {
nd = &nd_table[i];
@ -1606,6 +1690,10 @@ void net_check_clients(void)
NetClientState *nc;
int i;
if (nic_model_help) {
show_nic_models();
exit(0);
}
net_hub_check_clients();
QTAILQ_FOREACH(nc, &net_clients, next) {
@ -1685,6 +1773,12 @@ static int net_param_nic(void *dummy, QemuOpts *opts, Error **errp)
memset(ni, 0, sizeof(*ni));
ni->model = qemu_opt_get_del(opts, "model");
if (!nic_model_help && !g_strcmp0(ni->model, "help")) {
nic_model_help = g_hash_table_new_full(g_str_hash, g_str_equal,
g_free, NULL);
return 0;
}
/* Create an ID if the user did not specify one */
nd_id = g_strdup(qemu_opts_id(opts));
if (!nd_id) {