[PATCH 3/3] staging wlan-ng: refactor p80211wext.c to reduce text size.

From: Richard Kennedy
Date: Wed Mar 17 2010 - 10:41:21 EST

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Refactor the wext interface to reduce lines of code & module text size.

- add a helper function p80211wext_getmib
- rename p80211wext_dorequest to p80211wext_setmib
- refactor wext to call the get/set mib helpers and so reduce repeated code.

size reported text reduction :-
text data bss dec hex filename
8343 720 0 9063 2367 p80211wext.o.patch
9907 720 0 10631 2987 p80211wext.o.orig

Tested on x86_32 laptop, everything works correctly using NetworkManager,
and iwconfig & iwlist return sensible results when reading from the card.

Signed-off-by: Richard Kennedy <richard@xxxxxxxxxxxxxxx>
---
drivers/staging/wlan-ng/p80211wext.c | 298 +++++++++++++---------------------
1 files changed, 116 insertions(+), 182 deletions(-)

diff --git a/drivers/staging/wlan-ng/p80211wext.c b/drivers/staging/wlan-ng/p80211wext.c
index 6b4d3e4..6a6e612 100644
--- a/drivers/staging/wlan-ng/p80211wext.c
+++ b/drivers/staging/wlan-ng/p80211wext.c
@@ -127,18 +127,38 @@ static int qual_as_percent(int snr)
return 100;
}

-static int p80211wext_dorequest(wlandevice_t *wlandev, u32 did, u32 data)
+static int p80211wext_setmib(wlandevice_t *wlandev, u32 did, u32 data)
{
p80211msg_dot11req_mibset_t msg;
- p80211item_uint32_t mibitem;
+ p80211item_uint32_t *mibitem =
+ (p80211item_uint32_t *)&msg.mibattribute.data;
int result;

msg.msgcode = DIDmsg_dot11req_mibset;
- memset(&mibitem, 0, sizeof(mibitem));
- mibitem.did = did;
- mibitem.data = data;
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
+ memset(mibitem, 0, sizeof(*mibitem));
+ mibitem->did = did;
+ mibitem->data = data;
+ result = p80211req_dorequest(wlandev, (u8 *) &msg);
+
+ return result;
+}
+
+/*
+ * get a 32 bit mib value
+ */
+static int p80211wext_getmib(wlandevice_t *wlandev, u32 did, u32 *data)
+{
+ p80211msg_dot11req_mibset_t msg;
+ p80211item_uint32_t *mibitem =
+ (p80211item_uint32_t *)&msg.mibattribute.data;
+ int result;
+
+ msg.msgcode = DIDmsg_dot11req_mibget;
+ memset(mibitem, 0, sizeof(*mibitem));
+ mibitem->did = did;
result = p80211req_dorequest(wlandev, (u8 *) &msg);
+ if (!result)
+ *data = mibitem->data;

return result;
}
@@ -264,32 +284,26 @@ static int p80211wext_giwfreq(netdevice_t *dev,
struct iw_freq *freq, char *extra)
{
wlandevice_t *wlandev = dev->ml_priv;
- p80211item_uint32_t mibitem;
- p80211msg_dot11req_mibset_t msg;
int result;
int err = 0;
+ unsigned int value;

- msg.msgcode = DIDmsg_dot11req_mibget;
- memset(&mibitem, 0, sizeof(mibitem));
- mibitem.did = DIDmib_dot11phy_dot11PhyDSSSTable_dot11CurrentChannel;
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
-
+ result = p80211wext_getmib(wlandev,
+ DIDmib_dot11phy_dot11PhyDSSSTable_dot11CurrentChannel,
+ &value);
if (result) {
err = -EFAULT;
goto exit;
}

- memcpy(&mibitem, &msg.mibattribute.data, sizeof(mibitem));
-
- if (mibitem.data > NUM_CHANNELS) {
+ if (value > NUM_CHANNELS) {
err = -EFAULT;
goto exit;
}

/* convert into frequency instead of a channel */
freq->e = 1;
- freq->m = p80211_channel_to_mhz(mibitem.data, 0) * 100000;
+ freq->m = p80211_channel_to_mhz(value, 0) * 100000;

exit:
return err;
@@ -300,28 +314,23 @@ static int p80211wext_siwfreq(netdevice_t *dev,
struct iw_freq *freq, char *extra)
{
wlandevice_t *wlandev = dev->ml_priv;
- p80211item_uint32_t mibitem;
- p80211msg_dot11req_mibset_t msg;
int result;
int err = 0;
+ unsigned int value;

if (!wlan_wext_write) {
- err = (-EOPNOTSUPP);
+ err = -EOPNOTSUPP;
goto exit;
}

- msg.msgcode = DIDmsg_dot11req_mibset;
- memset(&mibitem, 0, sizeof(mibitem));
- mibitem.did = DIDmib_dot11phy_dot11PhyDSSSTable_dot11CurrentChannel;
- mibitem.status = P80211ENUM_msgitem_status_data_ok;
-
if ((freq->e == 0) && (freq->m <= 1000))
- mibitem.data = freq->m;
+ value = freq->m;
else
- mibitem.data = p80211_mhz_to_channel(freq->m);
+ value = p80211_mhz_to_channel(freq->m);

- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
+ result = p80211wext_setmib(wlandev,
+ DIDmib_dot11phy_dot11PhyDSSSTable_dot11CurrentChannel,
+ value);

if (result) {
err = -EFAULT;
@@ -361,13 +370,11 @@ static int p80211wext_siwmode(netdevice_t *dev,
__u32 *mode, char *extra)
{
wlandevice_t *wlandev = dev->ml_priv;
- p80211item_uint32_t mibitem;
- p80211msg_dot11req_mibset_t msg;
int result;
int err = 0;

if (!wlan_wext_write) {
- err = (-EOPNOTSUPP);
+ err = -EOPNOTSUPP;
goto exit;
}

@@ -398,16 +405,11 @@ static int p80211wext_siwmode(netdevice_t *dev,
}

/* Set Operation mode to the PORT TYPE RID */
- msg.msgcode = DIDmsg_dot11req_mibset;
- memset(&mibitem, 0, sizeof(mibitem));
- mibitem.did = DIDmib_p2_p2Static_p2CnfPortType;
- mibitem.data = (*mode == IW_MODE_ADHOC) ? 0 : 1;
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
-
+ result = p80211wext_setmib(wlandev,
+ DIDmib_p2_p2Static_p2CnfPortType,
+ (*mode == IW_MODE_ADHOC) ? 0 : 1);
if (result)
err = -EFAULT;
-
exit:
return err;
}
@@ -564,9 +566,9 @@ static int p80211wext_siwencode(netdevice_t *dev,
/* Set current key number only if no keys are given */
if (erq->flags & IW_ENCODE_NOKEY) {
result =
- p80211wext_dorequest(wlandev,
- DIDmib_dot11smt_dot11PrivacyTable_dot11WEPDefaultKeyID,
- i);
+ p80211wext_setmib(wlandev,
+ DIDmib_dot11smt_dot11PrivacyTable_dot11WEPDefaultKeyID,
+ i);

if (result) {
err = -EFAULT;
@@ -588,7 +590,6 @@ static int p80211wext_siwencode(netdevice_t *dev,
-------------------------------------------------------------*/

if (erq->length > 0) {
-
/* copy the key from the driver cache as the keys are read-only MIBs */
wlandev->wep_keylens[i] = erq->length;
memcpy(wlandev->wep_keys[i], key, erq->length);
@@ -638,12 +639,12 @@ static int p80211wext_siwencode(netdevice_t *dev,
/* Check the PrivacyInvoked flag */
if (erq->flags & IW_ENCODE_DISABLED) {
result =
- p80211wext_dorequest(wlandev,
+ p80211wext_setmib(wlandev,
DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked,
P80211ENUM_truth_false);
} else {
result =
- p80211wext_dorequest(wlandev,
+ p80211wext_setmib(wlandev,
DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked,
P80211ENUM_truth_true);
}
@@ -662,12 +663,12 @@ static int p80211wext_siwencode(netdevice_t *dev,
*/
if (erq->flags & IW_ENCODE_RESTRICTED) {
result =
- p80211wext_dorequest(wlandev,
+ p80211wext_setmib(wlandev,
DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted,
P80211ENUM_truth_true);
} else if (erq->flags & IW_ENCODE_OPEN) {
result =
- p80211wext_dorequest(wlandev,
+ p80211wext_setmib(wlandev,
DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted,
P80211ENUM_truth_false);
}
@@ -769,24 +770,16 @@ static int p80211wext_giwrate(netdevice_t *dev,
struct iw_param *rrq, char *extra)
{
wlandevice_t *wlandev = dev->ml_priv;
- p80211item_uint32_t mibitem;
- p80211msg_dot11req_mibset_t msg;
int result;
int err = 0;
+ unsigned int value;

- msg.msgcode = DIDmsg_dot11req_mibget;
- memset(&mibitem, 0, sizeof(mibitem));
- mibitem.did = DIDmib_p2_p2MAC_p2CurrentTxRate;
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
-
+ result = p80211wext_getmib(wlandev, DIDmib_p2_p2MAC_p2CurrentTxRate, &value);
if (result) {
err = -EFAULT;
goto exit;
}

- memcpy(&mibitem, &msg.mibattribute.data, sizeof(mibitem));
-
rrq->fixed = 0; /* can it change? */
rrq->disabled = 0;
rrq->value = 0;
@@ -796,7 +789,7 @@ static int p80211wext_giwrate(netdevice_t *dev,
#define HFA384x_RATEBIT_5dot5 ((u16)4)
#define HFA384x_RATEBIT_11 ((u16)8)

- switch (mibitem.data) {
+ switch (value) {
case HFA384x_RATEBIT_1:
rrq->value = 1000000;
break;
@@ -821,25 +814,19 @@ static int p80211wext_giwrts(netdevice_t *dev,
struct iw_param *rts, char *extra)
{
wlandevice_t *wlandev = dev->ml_priv;
- p80211item_uint32_t mibitem;
- p80211msg_dot11req_mibset_t msg;
int result;
int err = 0;
+ unsigned int value;

- msg.msgcode = DIDmsg_dot11req_mibget;
- memset(&mibitem, 0, sizeof(mibitem));
- mibitem.did = DIDmib_dot11mac_dot11OperationTable_dot11RTSThreshold;
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
-
+ result = p80211wext_getmib(wlandev,
+ DIDmib_dot11mac_dot11OperationTable_dot11RTSThreshold,
+ &value);
if (result) {
err = -EFAULT;
goto exit;
}

- memcpy(&mibitem, &msg.mibattribute.data, sizeof(mibitem));
-
- rts->value = mibitem.data;
+ rts->value = value;
rts->disabled = (rts->value == 2347);
rts->fixed = 1;

@@ -852,27 +839,23 @@ static int p80211wext_siwrts(netdevice_t *dev,
struct iw_param *rts, char *extra)
{
wlandevice_t *wlandev = dev->ml_priv;
- p80211item_uint32_t mibitem;
- p80211msg_dot11req_mibset_t msg;
int result;
int err = 0;
+ unsigned int value;

if (!wlan_wext_write) {
- err = (-EOPNOTSUPP);
+ err = -EOPNOTSUPP;
goto exit;
}

- msg.msgcode = DIDmsg_dot11req_mibget;
- memset(&mibitem, 0, sizeof(mibitem));
- mibitem.did = DIDmib_dot11mac_dot11OperationTable_dot11RTSThreshold;
if (rts->disabled)
- mibitem.data = 2347;
+ value = 2347;
else
- mibitem.data = rts->value;
-
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
+ value = rts->value;

+ result = p80211wext_setmib(wlandev,
+ DIDmib_dot11mac_dot11OperationTable_dot11RTSThreshold,
+ value);
if (result) {
err = -EFAULT;
goto exit;
@@ -887,26 +870,19 @@ static int p80211wext_giwfrag(netdevice_t *dev,
struct iw_param *frag, char *extra)
{
wlandevice_t *wlandev = dev->ml_priv;
- p80211item_uint32_t mibitem;
- p80211msg_dot11req_mibset_t msg;
int result;
int err = 0;
+ unsigned int value;

- msg.msgcode = DIDmsg_dot11req_mibget;
- memset(&mibitem, 0, sizeof(mibitem));
- mibitem.did =
- DIDmib_dot11mac_dot11OperationTable_dot11FragmentationThreshold;
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
-
+ result = p80211wext_getmib(wlandev,
+ DIDmib_dot11mac_dot11OperationTable_dot11FragmentationThreshold,
+ &value);
if (result) {
err = -EFAULT;
goto exit;
}

- memcpy(&mibitem, &msg.mibattribute.data, sizeof(mibitem));
-
- frag->value = mibitem.data;
+ frag->value = value;
frag->disabled = (frag->value == 2346);
frag->fixed = 1;

@@ -919,28 +895,23 @@ static int p80211wext_siwfrag(netdevice_t *dev,
struct iw_param *frag, char *extra)
{
wlandevice_t *wlandev = dev->ml_priv;
- p80211item_uint32_t mibitem;
- p80211msg_dot11req_mibset_t msg;
int result;
int err = 0;
+ int value;

if (!wlan_wext_write) {
err = (-EOPNOTSUPP);
goto exit;
}

- msg.msgcode = DIDmsg_dot11req_mibset;
- memset(&mibitem, 0, sizeof(mibitem));
- mibitem.did =
- DIDmib_dot11mac_dot11OperationTable_dot11FragmentationThreshold;
-
if (frag->disabled)
- mibitem.data = 2346;
+ value = 2346;
else
- mibitem.data = frag->value;
+ value = frag->value;

- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
+ result = p80211wext_setmib(wlandev,
+ DIDmib_dot11mac_dot11OperationTable_dot11FragmentationThreshold,
+ value);

if (result) {
err = -EFAULT;
@@ -964,56 +935,40 @@ static int p80211wext_giwretry(netdevice_t *dev,
struct iw_param *rrq, char *extra)
{
wlandevice_t *wlandev = dev->ml_priv;
- p80211item_uint32_t mibitem;
- p80211msg_dot11req_mibset_t msg;
int result;
int err = 0;
u16 shortretry, longretry, lifetime;
+ unsigned int value;

- msg.msgcode = DIDmsg_dot11req_mibget;
- memset(&mibitem, 0, sizeof(mibitem));
- mibitem.did = DIDmib_dot11mac_dot11OperationTable_dot11ShortRetryLimit;
-
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
-
+ result = p80211wext_getmib(wlandev,
+ DIDmib_dot11mac_dot11OperationTable_dot11ShortRetryLimit,
+ &value);
if (result) {
err = -EFAULT;
goto exit;
}

- memcpy(&mibitem, &msg.mibattribute.data, sizeof(mibitem));
-
- shortretry = mibitem.data;
-
- mibitem.did = DIDmib_dot11mac_dot11OperationTable_dot11LongRetryLimit;
-
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
+ shortretry = value;

+ result = p80211wext_getmib(wlandev,
+ DIDmib_dot11mac_dot11OperationTable_dot11LongRetryLimit,
+ &value);
if (result) {
err = -EFAULT;
goto exit;
}

- memcpy(&mibitem, &msg.mibattribute.data, sizeof(mibitem));
-
- longretry = mibitem.data;
-
- mibitem.did =
- DIDmib_dot11mac_dot11OperationTable_dot11MaxTransmitMSDULifetime;
-
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
+ longretry = value;

+ result = p80211wext_getmib(wlandev,
+ DIDmib_dot11mac_dot11OperationTable_dot11MaxTransmitMSDULifetime,
+ &value);
if (result) {
err = -EFAULT;
goto exit;
}

- memcpy(&mibitem, &msg.mibattribute.data, sizeof(mibitem));
-
- lifetime = mibitem.data;
+ lifetime = value;

rrq->disabled = 0;

@@ -1046,8 +1001,7 @@ static int p80211wext_siwretry(netdevice_t *dev,
p80211msg_dot11req_mibset_t msg;
int result;
int err = 0;
-
- memset(&mibitem, 0, sizeof(mibitem));
+ unsigned int value;

if (!wlan_wext_write) {
err = (-EOPNOTSUPP);
@@ -1062,26 +1016,20 @@ static int p80211wext_siwretry(netdevice_t *dev,
msg.msgcode = DIDmsg_dot11req_mibset;

if ((rrq->flags & IW_RETRY_TYPE) == IW_RETRY_LIFETIME) {
- mibitem.did =
- DIDmib_dot11mac_dot11OperationTable_dot11MaxTransmitMSDULifetime;
- mibitem.data = rrq->value /= 1024;
-
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);

+ value = rrq->value /= 1024;
+ result = p80211wext_setmib(wlandev,
+ DIDmib_dot11mac_dot11OperationTable_dot11MaxTransmitMSDULifetime,
+ value);
if (result) {
err = -EFAULT;
goto exit;
}
} else {
if (rrq->flags & IW_RETRY_LONG) {
- mibitem.did =
- DIDmib_dot11mac_dot11OperationTable_dot11LongRetryLimit;
- mibitem.data = rrq->value;
-
- memcpy(&msg.mibattribute.data, &mibitem,
- sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
+ result = p80211wext_setmib(wlandev,
+ DIDmib_dot11mac_dot11OperationTable_dot11LongRetryLimit,
+ rrq->value);

if (result) {
err = -EFAULT;
@@ -1090,13 +1038,9 @@ static int p80211wext_siwretry(netdevice_t *dev,
}

if (rrq->flags & IW_RETRY_SHORT) {
- mibitem.did =
- DIDmib_dot11mac_dot11OperationTable_dot11ShortRetryLimit;
- mibitem.data = rrq->value;
-
- memcpy(&msg.mibattribute.data, &mibitem,
- sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
+ result = p80211wext_setmib(wlandev,
+ DIDmib_dot11mac_dot11OperationTable_dot11ShortRetryLimit,
+ rrq->value);

if (result) {
err = -EFAULT;
@@ -1119,22 +1063,20 @@ static int p80211wext_siwtxpow(netdevice_t *dev,
p80211msg_dot11req_mibset_t msg;
int result;
int err = 0;
+ unsigned int value;

if (!wlan_wext_write) {
err = (-EOPNOTSUPP);
goto exit;
}

- msg.msgcode = DIDmsg_dot11req_mibset;
- memset(&mibitem, 0, sizeof(mibitem));
- mibitem.did =
- DIDmib_dot11phy_dot11PhyTxPowerTable_dot11CurrentTxPowerLevel;
if (rrq->fixed == 0)
- mibitem.data = 30;
+ value = 30;
else
- mibitem.data = rrq->value;
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
+ value = rrq->value;
+ result = p80211wext_setmib(wlandev,
+ DIDmib_dot11phy_dot11PhyTxPowerTable_dot11CurrentTxPowerLevel,
+ value);

if (result) {
err = -EFAULT;
@@ -1150,33 +1092,25 @@ static int p80211wext_giwtxpow(netdevice_t *dev,
struct iw_param *rrq, char *extra)
{
wlandevice_t *wlandev = dev->ml_priv;
- p80211item_uint32_t mibitem;
- p80211msg_dot11req_mibset_t msg;
int result;
int err = 0;
+ unsigned int value;

- msg.msgcode = DIDmsg_dot11req_mibget;
-
- memset(&mibitem, 0, sizeof(mibitem));
- mibitem.did =
- DIDmib_dot11phy_dot11PhyTxPowerTable_dot11CurrentTxPowerLevel;
-
- memcpy(&msg.mibattribute.data, &mibitem, sizeof(mibitem));
- result = p80211req_dorequest(wlandev, (u8 *) &msg);
+ result = p80211wext_getmib(wlandev,
+ DIDmib_dot11phy_dot11PhyTxPowerTable_dot11CurrentTxPowerLevel,
+ &value);

if (result) {
err = -EFAULT;
goto exit;
}

- memcpy(&mibitem, &msg.mibattribute.data, sizeof(mibitem));
-
/* XXX handle OFF by setting disabled = 1; */

rrq->flags = 0; /* IW_TXPOW_DBM; */
rrq->disabled = 0;
rrq->fixed = 0;
- rrq->value = mibitem.data;
+ rrq->value = value;

exit:
return err;
@@ -1481,7 +1415,7 @@ static int p80211wext_set_encodeext(struct net_device *dev,
}
pr_debug("setting default key (%d)\n", idx);
result =
- p80211wext_dorequest(wlandev,
+ p80211wext_setmib(wlandev,
DIDmib_dot11smt_dot11PrivacyTable_dot11WEPDefaultKeyID,
idx);
if (result)
@@ -1601,12 +1535,12 @@ static int p80211_wext_set_iwauth(struct net_device *dev,
pr_debug("drop_unencrypted %d\n", param->value);
if (param->value)
result =
- p80211wext_dorequest(wlandev,
+ p80211wext_setmib(wlandev,
DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted,
P80211ENUM_truth_true);
else
result =
- p80211wext_dorequest(wlandev,
+ p80211wext_setmib(wlandev,
DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted,
P80211ENUM_truth_false);
break;
@@ -1615,12 +1549,12 @@ static int p80211_wext_set_iwauth(struct net_device *dev,
pr_debug("privacy invoked %d\n", param->value);
if (param->value)
result =
- p80211wext_dorequest(wlandev,
+ p80211wext_setmib(wlandev,
DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked,
P80211ENUM_truth_true);
else
result =
- p80211wext_dorequest(wlandev,
+ p80211wext_setmib(wlandev,
DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked,
P80211ENUM_truth_false);

--
1.6.6.1

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