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Postpone global_init() call until first driver instance is initialized

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This avoids allocating global driver state for driver wrappers that
are built in but not used. This can save some resources and avoids
failures with driver_nl80211.c that is now initializing netlink
connections for nl80211 in global_init().
This commit is contained in:
Jouni Malinen 2011-10-23 13:20:52 +03:00
parent 3803bd331d
commit 7756114f6a
2 changed files with 38 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
hostapd/main.c
View File

@ -257,10 +257,22 @@ static int hostapd_driver_init(struct hostapd_iface *iface)
os_memset(&params, 0, sizeof(params));
for (i = 0; wpa_drivers[i]; i++) {
if (wpa_drivers[i] == hapd->driver) {
params.global_priv = global.drv_priv[i];
break;
if (wpa_drivers[i] != hapd->driver)
continue;
if (global.drv_priv[i] == NULL &&
wpa_drivers[i]->global_init) {
global.drv_priv[i] = wpa_drivers[i]->global_init();
if (global.drv_priv[i] == NULL) {
wpa_printf(MSG_ERROR, "Failed to initialize "
"driver '%s'",
wpa_drivers[i]->name);
return -1;
}
}
params.global_priv = global.drv_priv[i];
break;
}
params.bssid = b;
params.ifname = hapd->conf->iface;
@ -425,16 +437,6 @@ static int hostapd_global_init(struct hapd_interfaces *interfaces,
global.drv_priv = os_zalloc(global.drv_count * sizeof(void *));
if (global.drv_priv == NULL)
return -1;
for (i = 0; wpa_drivers[i]; i++) {
if (!wpa_drivers[i]->global_init)
continue;
global.drv_priv[i] = wpa_drivers[i]->global_init();
if (global.drv_priv[i] == NULL) {
wpa_printf(MSG_ERROR, "Failed to initialize driver "
"'%s'", wpa_drivers[i]->name);
return -1;
}
}
return 0;
}

43
wpa_supplicant/wpa_supplicant.c
View File

@ -1867,6 +1867,26 @@ struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
}
static int select_driver(struct wpa_supplicant *wpa_s, int i)
{
struct wpa_global *global = wpa_s->global;
if (wpa_drivers[i]->global_init && global->drv_priv[i] == NULL) {
global->drv_priv[i] = wpa_drivers[i]->global_init();
if (global->drv_priv[i] == NULL) {
wpa_printf(MSG_ERROR, "Failed to initialize driver "
"'%s'", wpa_drivers[i]->name);
return -1;
}
}
wpa_s->driver = wpa_drivers[i];
wpa_s->global_drv_priv = global->drv_priv[i];
return 0;
}
static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
const char *name)
{
@ -1885,9 +1905,7 @@ static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
if (name == NULL) {
/* default to first driver in the list */
wpa_s->driver = wpa_drivers[0];
wpa_s->global_drv_priv = wpa_s->global->drv_priv[0];
return 0;
return select_driver(wpa_s, 0);
}
do {
@ -1900,12 +1918,8 @@ static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
for (i = 0; wpa_drivers[i]; i++) {
if (os_strlen(wpa_drivers[i]->name) == len &&
os_strncmp(driver, wpa_drivers[i]->name, len) ==
0) {
wpa_s->driver = wpa_drivers[i];
wpa_s->global_drv_priv =
wpa_s->global->drv_priv[i];
return 0;
}
0)
return select_driver(wpa_s, i);
}
driver = pos + 1;
@ -2625,17 +2639,6 @@ struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
wpa_supplicant_deinit(global);
return NULL;
}
for (i = 0; wpa_drivers[i]; i++) {
if (!wpa_drivers[i]->global_init)
continue;
global->drv_priv[i] = wpa_drivers[i]->global_init();
if (global->drv_priv[i] == NULL) {
wpa_printf(MSG_ERROR, "Failed to initialize driver "
"'%s'", wpa_drivers[i]->name);
wpa_supplicant_deinit(global);
return NULL;
}
}
return global;
}