mac80211: dont add BSS when creating IBSS

There's no need to create a BSS struct only to pass it to
ieee80211_sta_join_ibss, so refactor this function into
__ieee80211_sta_join_ibss which takes all the relevant
paramters, and ieee80211_sta_join_ibss which takes a BSS
struct (used when joining an IBSS that already has other
members).

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index cbc0b7d..87d63fe 100644 (file)
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -953,9 +953,6 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
                          struct ieee80211_channel *channel,
                          bool beacon);
 struct ieee80211_bss *
-ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,
-                    u8 *ssid, u8 ssid_len);
-struct ieee80211_bss *
 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
                     u8 *ssid, u8 ssid_len);
 void ieee80211_rx_bss_put(struct ieee80211_local *local,

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 46b4817..c5991ec 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -546,14 +546,15 @@ void ieee80211_send_pspoll(struct ieee80211_local *local,
 
 /* MLME */
 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
-                                        struct ieee80211_bss *bss)
+                                        const size_t supp_rates_len,
+                                        const u8 *supp_rates)
 {
        struct ieee80211_local *local = sdata->local;
        int i, have_higher_than_11mbit = 0;
 
        /* cf. IEEE 802.11 9.2.12 */
-       for (i = 0; i < bss->supp_rates_len; i++)
-               if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
+       for (i = 0; i < supp_rates_len; i++)
+               if ((supp_rates[i] & 0x7f) * 5 > 110)
                        have_higher_than_11mbit = 1;
 
        if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
@@ -1546,9 +1547,13 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
 }
 
 
-static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
-                                  struct ieee80211_if_sta *ifsta,
-                                  struct ieee80211_bss *bss)
+static int __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
+                                    struct ieee80211_if_sta *ifsta,
+                                    const u8 *bssid, const int beacon_int,
+                                    const int freq,
+                                    const size_t supp_rates_len,
+                                    const u8 *supp_rates,
+                                    const u16 capability)
 {
        struct ieee80211_local *local = sdata->local;
        int res = 0, rates, i, j;
@@ -1564,7 +1569,7 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
        }
 
        if ((ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) &&
-          memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) == 0)
+          memcmp(ifsta->bssid, bssid, ETH_ALEN) == 0)
                return res;
 
        skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 +
@@ -1575,28 +1580,28 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
                return -ENOMEM;
        }
 
-       sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
-
        if (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) {
                /* Remove possible STA entries from other IBSS networks. */
                sta_info_flush_delayed(sdata);
        }
 
-       memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
+       memcpy(ifsta->bssid, bssid, ETH_ALEN);
        res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
        if (res)
                return res;
 
-       local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
+       local->hw.conf.beacon_int = beacon_int >= 10 ? beacon_int : 10;
 
-       sdata->drop_unencrypted = bss->capability &
+       sdata->drop_unencrypted = capability &
                WLAN_CAPABILITY_PRIVACY ? 1 : 0;
 
-       res = ieee80211_set_freq(sdata, bss->freq);
+       res = ieee80211_set_freq(sdata, freq);
 
        if (res)
                return res;
 
+       sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
+
        /* Build IBSS probe response */
 
        skb_reserve(skb, local->hw.extra_tx_headroom);
@@ -1605,33 +1610,32 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
                skb_put(skb, 24 + sizeof(mgmt->u.beacon));
        memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
        mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
-                                               IEEE80211_STYPE_PROBE_RESP);
+                                         IEEE80211_STYPE_PROBE_RESP);
        memset(mgmt->da, 0xff, ETH_ALEN);
        memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
        memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
        mgmt->u.beacon.beacon_int =
                cpu_to_le16(local->hw.conf.beacon_int);
-       mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
-       mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
+       mgmt->u.beacon.capab_info = cpu_to_le16(capability);
 
        pos = skb_put(skb, 2 + ifsta->ssid_len);
        *pos++ = WLAN_EID_SSID;
        *pos++ = ifsta->ssid_len;
        memcpy(pos, ifsta->ssid, ifsta->ssid_len);
 
-       rates = bss->supp_rates_len;
+       rates = supp_rates_len;
        if (rates > 8)
                rates = 8;
        pos = skb_put(skb, 2 + rates);
        *pos++ = WLAN_EID_SUPP_RATES;
        *pos++ = rates;
-       memcpy(pos, bss->supp_rates, rates);
+       memcpy(pos, supp_rates, rates);
 
-       if (bss->band == IEEE80211_BAND_2GHZ) {
+       if (sband->band == IEEE80211_BAND_2GHZ) {
                pos = skb_put(skb, 2 + 1);
                *pos++ = WLAN_EID_DS_PARAMS;
                *pos++ = 1;
-               *pos++ = ieee80211_frequency_to_channel(bss->freq);
+               *pos++ = ieee80211_frequency_to_channel(freq);
        }
 
        pos = skb_put(skb, 2 + 2);
@@ -1641,12 +1645,12 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
        *pos++ = 0;
        *pos++ = 0;
 
-       if (bss->supp_rates_len > 8) {
-               rates = bss->supp_rates_len - 8;
+       if (supp_rates_len > 8) {
+               rates = supp_rates_len - 8;
                pos = skb_put(skb, 2 + rates);
                *pos++ = WLAN_EID_EXT_SUPP_RATES;
                *pos++ = rates;
-               memcpy(pos, &bss->supp_rates[8], rates);
+               memcpy(pos, &supp_rates[8], rates);
        }
 
        add_extra_ies(skb, sdata->u.sta.ie_proberesp,
@@ -1659,16 +1663,15 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 
 
        rates = 0;
-       sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
-       for (i = 0; i < bss->supp_rates_len; i++) {
-               int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
+       for (i = 0; i < supp_rates_len; i++) {
+               int bitrate = (supp_rates[i] & 0x7f) * 5;
                for (j = 0; j < sband->n_bitrates; j++)
                        if (sband->bitrates[j].bitrate == bitrate)
                                rates |= BIT(j);
        }
        ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
 
-       ieee80211_sta_def_wmm_params(sdata, bss);
+       ieee80211_sta_def_wmm_params(sdata, supp_rates_len, supp_rates);
 
        ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
        ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
@@ -1677,12 +1680,23 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
        ieee80211_led_assoc(local, true);
 
        memset(&wrqu, 0, sizeof(wrqu));
-       memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
+       memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
        wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
 
        return res;
 }
 
+static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
+                                  struct ieee80211_if_sta *ifsta,
+                                  struct ieee80211_bss *bss)
+{
+       return __ieee80211_sta_join_ibss(sdata, ifsta,
+                                        bss->bssid, bss->beacon_int,
+                                        bss->freq,
+                                        bss->supp_rates_len, bss->supp_rates,
+                                        bss->capability);
+}
+
 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
                                  struct ieee80211_mgmt *mgmt,
                                  size_t len,
@@ -2251,11 +2265,12 @@ static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
                                     struct ieee80211_if_sta *ifsta)
 {
        struct ieee80211_local *local = sdata->local;
-       struct ieee80211_bss *bss;
        struct ieee80211_supported_band *sband;
-       u8 bssid[ETH_ALEN], *pos;
+       u8 *pos;
+       u8 bssid[ETH_ALEN];
+       u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
+       u16 capability;
        int i;
-       int ret;
 
        if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) {
                memcpy(bssid, ifsta->bssid, ETH_ALEN);
@@ -2273,36 +2288,29 @@ static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
        printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
               sdata->dev->name, bssid);
 
-       bss = ieee80211_rx_bss_add(local, bssid,
-                                  local->hw.conf.channel->center_freq,
-                                  sdata->u.sta.ssid, sdata->u.sta.ssid_len);
-       if (!bss)
-               return -ENOMEM;
-
-       bss->band = local->hw.conf.channel->band;
-       sband = local->hw.wiphy->bands[bss->band];
+       sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 
        if (local->hw.conf.beacon_int == 0)
                local->hw.conf.beacon_int = 100;
-       bss->beacon_int = local->hw.conf.beacon_int;
-       bss->last_update = jiffies;
-       bss->capability = WLAN_CAPABILITY_IBSS;
+
+       capability = WLAN_CAPABILITY_IBSS;
 
        if (sdata->default_key)
-               bss->capability |= WLAN_CAPABILITY_PRIVACY;
+               capability |= WLAN_CAPABILITY_PRIVACY;
        else
                sdata->drop_unencrypted = 0;
 
-       bss->supp_rates_len = sband->n_bitrates;
-       pos = bss->supp_rates;
+       pos = supp_rates;
        for (i = 0; i < sband->n_bitrates; i++) {
                int rate = sband->bitrates[i].bitrate;
                *pos++ = (u8) (rate / 5);
        }
 
-       ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
-       ieee80211_rx_bss_put(local, bss);
-       return ret;
+       return __ieee80211_sta_join_ibss(sdata, ifsta,
+                                        bssid, local->hw.conf.beacon_int,
+                                        local->hw.conf.channel->center_freq,
+                                        sband->n_bitrates, supp_rates,
+                                        capability);
 }
 
 
@@ -2471,7 +2479,8 @@ static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
                        ieee80211_sta_set_ssid(sdata, selected->ssid,
                                               selected->ssid_len);
                ieee80211_sta_set_bssid(sdata, selected->bssid);
-               ieee80211_sta_def_wmm_params(sdata, selected);
+               ieee80211_sta_def_wmm_params(sdata, selected->supp_rates_len,
+                                                   selected->supp_rates);
                if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED)
                        sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED;
                else

diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index c6b275b..fc88e2e 100644 (file)
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -14,11 +14,7 @@
 
 /* TODO:
  * figure out how to avoid that the "current BSS" expires
- * clean up IBSS code (in MLME), see why it adds a BSS to the list
- * use cfg80211's BSS handling (depends on IBSS TODO above)
- * order BSS list by RSSI(?) ("quality of AP")
- * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
- *    SSID)
+ * use cfg80211's BSS handling
  */
 
 #include <linux/wireless.h>
@@ -107,7 +103,7 @@ static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
        }
 }
 
-struct ieee80211_bss *
+static struct ieee80211_bss *
 ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,
                     u8 *ssid, u8 ssid_len)
 {