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mac80211: remove probe response temporary buffer allocation 

Instead of allocating a temporary buffer to build IEs
build them right into the SKB.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2012-11-29 13:00:10 +01:00
parent c604b9f219
commit b9a9ada14a
6 changed files with 25 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/net/wireless/mac80211_hwsim.c
View File

@ -1347,9 +1347,14 @@ static void hw_scan_work(struct work_struct *work)
hwsim->hw_scan_vif,
req->ssids[i].ssid,
req->ssids[i].ssid_len,
req->ie, req->ie_len);
req->ie_len);
if (!probe)
continue;
if (req->ie_len)
memcpy(skb_put(probe, req->ie_len), req->ie,
req->ie_len);
local_bh_disable();
mac80211_hwsim_tx_frame(hwsim->hw, probe,
hwsim->tmp_chan);

4
drivers/net/wireless/ti/wl1251/main.c
View File

@ -896,11 +896,13 @@ static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
goto out;
skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
req->ie, req->ie_len);
req->ie_len);
if (!skb) {
ret = -ENOMEM;
goto out;
}
if (req->ie_len)
memcpy(skb_put(skb, req->ie_len), req->ie, req->ie_len);
ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
skb->len);

4
drivers/net/wireless/ti/wlcore/cmd.c
View File

@ -1038,11 +1038,13 @@ int wl12xx_cmd_build_probe_req(struct wl1271 *wl, struct wl12xx_vif *wlvif,
u16 template_id_5 = CMD_TEMPL_CFG_PROBE_REQ_5;
skb = ieee80211_probereq_get(wl->hw, vif, ssid, ssid_len,
ie, ie_len);
ie_len);
if (!skb) {
ret = -ENOMEM;
goto out;
}
if (ie_len)
memcpy(skb_put(skb, ie_len), ie, ie_len);
wl1271_dump(DEBUG_SCAN, "PROBE REQ: ", skb->data, skb->len);

5
include/net/mac80211.h
View File

@ -3144,8 +3144,7 @@ struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
* @vif: &struct ieee80211_vif pointer from the add_interface callback.
* @ssid: SSID buffer
* @ssid_len: length of SSID
* @ie: buffer containing all IEs except SSID for the template
* @ie_len: length of the IE buffer
* @tailroom: tailroom to reserve at end of SKB for IEs
*
* Creates a Probe Request template which can, for example, be uploaded to
* hardware.
@ -3153,7 +3152,7 @@ struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
const u8 *ssid, size_t ssid_len,
const u8 *ie, size_t ie_len);
size_t tailroom);
/**
* ieee80211_rts_get - RTS frame generation function

9
net/mac80211/tx.c
View File

@ -2620,7 +2620,7 @@ EXPORT_SYMBOL(ieee80211_nullfunc_get);
struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
const u8 *ssid, size_t ssid_len,
const u8 *ie, size_t ie_len)
size_t tailroom)
{
struct ieee80211_sub_if_data *sdata;
struct ieee80211_local *local;
@ -2634,7 +2634,7 @@ struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
ie_ssid_len = 2 + ssid_len;
skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
ie_ssid_len + ie_len);
ie_ssid_len + tailroom);
if (!skb)
return NULL;
@ -2655,11 +2655,6 @@ struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
memcpy(pos, ssid, ssid_len);
pos += ssid_len;
if (ie) {
pos = skb_put(skb, ie_len);
memcpy(pos, ie, ie_len);
}
return skb;
}
EXPORT_SYMBOL(ieee80211_probereq_get);

26
net/mac80211/util.c
View File

@ -1239,14 +1239,8 @@ struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb;
struct ieee80211_mgmt *mgmt;
size_t buf_len;
u8 *buf;
u8 chan_no;
/* FIXME: come up with a proper value */
buf = kmalloc(200 + ie_len, GFP_KERNEL);
if (!buf)
return NULL;
int ies_len;
/*
* Do not send DS Channel parameter for directed probe requests
@ -1258,15 +1252,16 @@ struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
else
chan_no = ieee80211_frequency_to_channel(chan->center_freq);
buf_len = ieee80211_build_preq_ies(local, buf, 200 + ie_len,
skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
ssid, ssid_len, 100 + ie_len);
if (!skb)
return NULL;
ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
skb_tailroom(skb),
ie, ie_len, chan->band,
ratemask, chan_no);
skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
ssid, ssid_len,
buf, buf_len);
if (!skb)
goto out;
skb_put(skb, ies_len);
if (dst) {
mgmt = (struct ieee80211_mgmt *) skb->data;
@ -1276,9 +1271,6 @@ struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
out:
kfree(buf);
return skb;
}