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mac80211: use compare_ether_addr on MAC addresses instead of memcmp 

Because of the constant size and guaranteed 16 bit alignment, the inline
compare_ether_addr function is much cheaper than calling memcmp.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2012-03-01 15:22:09 +01:00 committed by John W. Linville
parent 4d196e4b2f
commit 888d04dfbe
10 changed files with 53 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
net/mac80211/ibss.c
View File

@ -66,7 +66,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
skb_reset_tail_pointer(skb);
skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
if (memcmp(ifibss->bssid, bssid, ETH_ALEN))
if (compare_ether_addr(ifibss->bssid, bssid))
sta_info_flush(sdata->local, sdata);
/* if merging, indicate to driver that we leave the old IBSS */
@ -403,7 +403,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
return;
if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
memcmp(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN) == 0) {
compare_ether_addr(mgmt->bssid, sdata->u.ibss.bssid) == 0) {
rcu_read_lock();
sta = sta_info_get(sdata, mgmt->sa);
@ -508,7 +508,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
goto put_bss;
/* same BSSID */
if (memcmp(cbss->bssid, sdata->u.ibss.bssid, ETH_ALEN) == 0)
if (compare_ether_addr(cbss->bssid, sdata->u.ibss.bssid) == 0)
goto put_bss;
if (rx_status->flag & RX_FLAG_MACTIME_MPDU) {
@ -831,8 +831,8 @@ static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da))
return;
if (memcmp(mgmt->bssid, ifibss->bssid, ETH_ALEN) != 0 &&
memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
if (compare_ether_addr(mgmt->bssid, ifibss->bssid) != 0 &&
!is_broadcast_ether_addr(mgmt->bssid))
return;
end = ((u8 *) mgmt) + len;

2
net/mac80211/mesh.c
View File

@ -204,7 +204,7 @@ int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr,
kmem_cache_free(rm_cache, p);
--entries;
} else if ((seqnum == p->seqnum) &&
(memcmp(sa, p->sa, ETH_ALEN) == 0))
(compare_ether_addr(sa, p->sa) == 0))
return -1;
}

19
net/mac80211/mesh_hwmp.c
View File

@ -8,6 +8,7 @@
*/
#include <linux/slab.h>
#include <linux/etherdevice.h>
#include <asm/unaligned.h>
#include "wme.h"
#include "mesh.h"
@ -419,7 +420,7 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
new_metric = MAX_METRIC;
exp_time = TU_TO_EXP_TIME(orig_lifetime);
if (memcmp(orig_addr, sdata->vif.addr, ETH_ALEN) == 0) {
if (compare_ether_addr(orig_addr, sdata->vif.addr) == 0) {
/* This MP is the originator, we are not interested in this
* frame, except for updating transmitter's path info.
*/
@ -469,7 +470,7 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
/* Update and check transmitter routing info */
ta = mgmt->sa;
if (memcmp(orig_addr, ta, ETH_ALEN) == 0)
if (compare_ether_addr(orig_addr, ta) == 0)
fresh_info = false;
else {
fresh_info = true;
@ -530,7 +531,7 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
mhwmp_dbg("received PREQ from %pM", orig_addr);
if (memcmp(target_addr, sdata->vif.addr, ETH_ALEN) == 0) {
if (compare_ether_addr(target_addr, sdata->vif.addr) == 0) {
mhwmp_dbg("PREQ is for us");
forward = false;
reply = true;
@ -627,7 +628,7 @@ static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
mhwmp_dbg("received PREP from %pM", PREP_IE_ORIG_ADDR(prep_elem));
orig_addr = PREP_IE_ORIG_ADDR(prep_elem);
if (memcmp(orig_addr, sdata->vif.addr, ETH_ALEN) == 0)
if (compare_ether_addr(orig_addr, sdata->vif.addr) == 0)
/* destination, no forwarding required */
return;
@ -697,10 +698,12 @@ static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata,
rcu_read_lock();
mpath = mesh_path_lookup(target_addr, sdata);
if (mpath) {
struct sta_info *sta;
spin_lock_bh(&mpath->state_lock);
sta = next_hop_deref_protected(mpath);
if (mpath->flags & MESH_PATH_ACTIVE &&
memcmp(ta, next_hop_deref_protected(mpath)->sta.addr,
ETH_ALEN) == 0 &&
compare_ether_addr(ta, sta->sta.addr) == 0 &&
(!(mpath->flags & MESH_PATH_SN_VALID) ||
SN_GT(target_sn, mpath->sn))) {
mpath->flags &= ~MESH_PATH_ACTIVE;
@ -742,7 +745,7 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata,
metric = rann->rann_metric;
/* Ignore our own RANNs */
if (memcmp(orig_addr, sdata->vif.addr, ETH_ALEN) == 0)
if (compare_ether_addr(orig_addr, sdata->vif.addr) == 0)
return;
mhwmp_dbg("received RANN from %pM via neighbour %pM (is_gate=%d)",
@ -1074,7 +1077,7 @@ int mesh_nexthop_lookup(struct sk_buff *skb,
if (time_after(jiffies,
mpath->exp_time -
msecs_to_jiffies(sdata->u.mesh.mshcfg.path_refresh_time)) &&
!memcmp(sdata->vif.addr, hdr->addr4, ETH_ALEN) &&
!compare_ether_addr(sdata->vif.addr, hdr->addr4) &&
!(mpath->flags & MESH_PATH_RESOLVING) &&
!(mpath->flags & MESH_PATH_FIXED))
mesh_queue_preq(mpath, PREQ_Q_F_START | PREQ_Q_F_REFRESH);

14
net/mac80211/mesh_pathtbl.c
View File

@ -348,7 +348,7 @@ static struct mesh_path *mpath_lookup(struct mesh_table *tbl, u8 *dst,
hlist_for_each_entry_rcu(node, n, bucket, list) {
mpath = node->mpath;
if (mpath->sdata == sdata &&
memcmp(dst, mpath->dst, ETH_ALEN) == 0) {
compare_ether_addr(dst, mpath->dst) == 0) {
if (MPATH_EXPIRED(mpath)) {
spin_lock_bh(&mpath->state_lock);
mpath->flags &= ~MESH_PATH_ACTIVE;
@ -523,7 +523,7 @@ int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata)
int err = 0;
u32 hash_idx;
if (memcmp(dst, sdata->vif.addr, ETH_ALEN) == 0)
if (compare_ether_addr(dst, sdata->vif.addr) == 0)
/* never add ourselves as neighbours */
return -ENOTSUPP;
@ -564,7 +564,8 @@ int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata)
err = -EEXIST;
hlist_for_each_entry(node, n, bucket, list) {
mpath = node->mpath;
if (mpath->sdata == sdata && memcmp(dst, mpath->dst, ETH_ALEN) == 0)
if (mpath->sdata == sdata &&
compare_ether_addr(dst, mpath->dst) == 0)
goto err_exists;
}
@ -655,7 +656,7 @@ int mpp_path_add(u8 *dst, u8 *mpp, struct ieee80211_sub_if_data *sdata)
int err = 0;
u32 hash_idx;
if (memcmp(dst, sdata->vif.addr, ETH_ALEN) == 0)
if (compare_ether_addr(dst, sdata->vif.addr) == 0)
/* never add ourselves as neighbours */
return -ENOTSUPP;
@ -692,7 +693,8 @@ int mpp_path_add(u8 *dst, u8 *mpp, struct ieee80211_sub_if_data *sdata)
err = -EEXIST;
hlist_for_each_entry(node, n, bucket, list) {
mpath = node->mpath;
if (mpath->sdata == sdata && memcmp(dst, mpath->dst, ETH_ALEN) == 0)
if (mpath->sdata == sdata &&
compare_ether_addr(dst, mpath->dst) == 0)
goto err_exists;
}
@ -886,7 +888,7 @@ int mesh_path_del(u8 *addr, struct ieee80211_sub_if_data *sdata)
hlist_for_each_entry(node, n, bucket, list) {
mpath = node->mpath;
if (mpath->sdata == sdata &&
memcmp(addr, mpath->dst, ETH_ALEN) == 0) {
compare_ether_addr(addr, mpath->dst) == 0) {
__mesh_path_del(tbl, node);
goto enddel;
}

30
net/mac80211/mlme.c
View File

@ -1822,7 +1822,7 @@ ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
if (memcmp(bssid, mgmt->bssid, ETH_ALEN))
if (compare_ether_addr(bssid, mgmt->bssid))
return RX_MGMT_NONE;
auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
@ -1903,7 +1903,7 @@ ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
return RX_MGMT_NONE;
if (!ifmgd->associated ||
memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
return RX_MGMT_NONE;
bssid = ifmgd->associated->bssid;
@ -1936,7 +1936,7 @@ ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
return RX_MGMT_NONE;
if (!ifmgd->associated ||
memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
return RX_MGMT_NONE;
reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
@ -2203,7 +2203,7 @@ ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
if (!assoc_data)
return RX_MGMT_NONE;
if (memcmp(assoc_data->bss->bssid, mgmt->bssid, ETH_ALEN))
if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
return RX_MGMT_NONE;
/*
@ -2291,8 +2291,8 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
bool need_ps = false;
if (sdata->u.mgd.associated &&
memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
ETH_ALEN) == 0) {
compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
== 0) {
bss = (void *)sdata->u.mgd.associated->priv;
/* not previously set so we may need to recalc */
need_ps = !bss->dtim_period;
@ -2347,7 +2347,7 @@ static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
ASSERT_MGD_MTX(ifmgd);
if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
if (compare_ether_addr(mgmt->da, sdata->vif.addr))
return; /* ignore ProbeResp to foreign address */
baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
@ -2360,11 +2360,12 @@ static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
if (ifmgd->associated &&
memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
ieee80211_reset_ap_probe(sdata);
if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
memcmp(mgmt->bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN) == 0) {
compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
== 0) {
/* got probe response, continue with auth */
printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
ifmgd->auth_data->tries = 0;
@ -2421,7 +2422,8 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
return;
if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
memcmp(mgmt->bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN) == 0) {
compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
== 0) {
ieee802_11_parse_elems(mgmt->u.beacon.variable,
len - baselen, &elems);
@ -2436,7 +2438,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
}
if (!ifmgd->associated ||
memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
return;
bssid = ifmgd->associated->bssid;
@ -3299,7 +3301,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
bool match;
/* keep sta info, bssid if matching */
match = memcmp(ifmgd->bssid, req->bss->bssid, ETH_ALEN) == 0;
match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
ieee80211_destroy_auth_data(sdata, match);
}
@ -3421,7 +3423,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
goto err_clear;
}
} else
WARN_ON_ONCE(memcmp(ifmgd->bssid, req->bss->bssid, ETH_ALEN));
WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, req->bss->bssid));
if (!bss->dtim_period &&
sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
@ -3471,7 +3473,7 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
sdata->name, req->bssid, req->reason_code);
if (ifmgd->associated &&
memcmp(ifmgd->associated->bssid, req->bssid, ETH_ALEN) == 0)
compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
req->reason_code, true, frame_buf);
else

6
net/mac80211/rx.c
View File

@ -489,12 +489,12 @@ ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
if (ieee80211_has_tods(hdr->frame_control) ||
!ieee80211_has_fromds(hdr->frame_control))
return RX_DROP_MONITOR;
if (memcmp(hdr->addr3, dev_addr, ETH_ALEN) == 0)
if (compare_ether_addr(hdr->addr3, dev_addr) == 0)
return RX_DROP_MONITOR;
} else {
if (!ieee80211_has_a4(hdr->frame_control))
return RX_DROP_MONITOR;
if (memcmp(hdr->addr4, dev_addr, ETH_ALEN) == 0)
if (compare_ether_addr(hdr->addr4, dev_addr) == 0)
return RX_DROP_MONITOR;
}
}
@ -2336,7 +2336,7 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
if (sdata->vif.type != NL80211_IFTYPE_STATION)
break;
if (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN))
if (compare_ether_addr(mgmt->bssid, sdata->u.mgd.bssid))
break;
goto queue;

3
net/mac80211/scan.c
View File

@ -13,6 +13,7 @@
*/
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <linux/pm_qos.h>
#include <net/sch_generic.h>
@ -176,7 +177,7 @@ ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
presp = ieee80211_is_probe_resp(fc);
if (presp) {
/* ignore ProbeResp to foreign address */
if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
if (compare_ether_addr(mgmt->da, sdata->vif.addr))
return RX_DROP_MONITOR;
presp = true;

5
net/mac80211/sta_info.c
View File

@ -9,6 +9,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/slab.h>
@ -101,7 +102,7 @@ struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
lockdep_is_held(&local->sta_mtx));
while (sta) {
if (sta->sdata == sdata &&
memcmp(sta->sta.addr, addr, ETH_ALEN) == 0)
compare_ether_addr(sta->sta.addr, addr) == 0)
break;
sta = rcu_dereference_check(sta->hnext,
lockdep_is_held(&local->sta_mtx));
@ -124,7 +125,7 @@ struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
while (sta) {
if ((sta->sdata == sdata ||
(sta->sdata->bss && sta->sdata->bss == sdata->bss)) &&
memcmp(sta->sta.addr, addr, ETH_ALEN) == 0)
compare_ether_addr(sta->sta.addr, addr) == 0)
break;
sta = rcu_dereference_check(sta->hnext,
lockdep_is_held(&local->sta_mtx));

3
net/mac80211/sta_info.h
View File

@ -14,6 +14,7 @@
#include <linux/if_ether.h>
#include <linux/workqueue.h>
#include <linux/average.h>
#include <linux/etherdevice.h>
#include "key.h"
/**
@ -489,7 +490,7 @@ void for_each_sta_info_type_check(struct ieee80211_local *local,
nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \
) \
/* compare address and run code only if it matches */ \
if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0)
if (compare_ether_addr(_sta->sta.addr, (_addr)) == 0)
/*
* Get STA info by index, BROKEN!

3
net/mac80211/status.c
View File

@ -10,6 +10,7 @@
*/
#include <linux/export.h>
#include <linux/etherdevice.h>
#include <net/mac80211.h>
#include <asm/unaligned.h>
#include "ieee80211_i.h"
@ -377,7 +378,7 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
for_each_sta_info(local, hdr->addr1, sta, tmp) {
/* skip wrong virtual interface */
if (memcmp(hdr->addr2, sta->sdata->vif.addr, ETH_ALEN))
if (compare_ether_addr(hdr->addr2, sta->sdata->vif.addr))
continue;
if (info->flags & IEEE80211_TX_STATUS_EOSP)