dahdi: Reduce 'chans' references in dahdi_ctl_ioctl.

Review: https://reviewboard.asterisk.org/r/905/

Signed-off-by: Shaun Ruffell <sruffell@digium.com>

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9381 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This commit is contained in:
Shaun Ruffell 2010-09-20 20:34:23 +00:00
parent 4ae563309a
commit a03f6a2eb3

View File

@ -415,23 +415,21 @@ static bool valid_channo(const int channo)
false : true;
}
#define VALID_CHANNEL(j) do { \
if (!valid_channo(j)) \
return -EINVAL; \
if (!chans[j]) \
return -ENXIO; \
} while (0)
/* Protected by chan_lock. */
static struct dahdi_span *spans[DAHDI_MAX_SPANS];
static struct dahdi_chan *chans[DAHDI_MAX_CHANNELS];
static int maxspans = 0;
static struct dahdi_chan *chan_from_file(struct file *file)
static inline struct dahdi_chan *chan_from_num(unsigned int channo)
{
return (file->private_data) ? file->private_data :
((valid_channo(UNIT(file))) ? chans[UNIT(file)] : NULL);
return valid_channo(channo) ? chans[channo] : NULL;
}
static inline struct dahdi_chan *chan_from_file(struct file *file)
{
return (file->private_data) ?
file->private_data : chan_from_num(UNIT(file));
}
static struct dahdi_span *find_span(int spanno)
@ -941,7 +939,7 @@ static void dahdi_check_conf(int x)
return;
for (y = 0; y < maxchans; y++) {
struct dahdi_chan *const chan = chans[y];
struct dahdi_chan *const chan = chan_from_num(y);
const int confmode = chan->confmode & DAHDI_CONF_MODE_MASK;
if (chan && (chan->confna == x) &&
(confmode == DAHDI_CONF_CONF ||
@ -2062,7 +2060,7 @@ static void dahdi_chan_unreg(struct dahdi_chan *chan)
#endif
maxchans = 0;
for (x = 1; x < DAHDI_MAX_CHANNELS; x++) {
struct dahdi_chan *const pos = chans[x];
struct dahdi_chan *const pos = chan_from_num(x);
if (!pos)
continue;
maxchans = x + 1;
@ -3663,14 +3661,8 @@ static int dahdi_ioctl_getgains(struct file *file, unsigned long data)
res = -EFAULT;
goto cleanup;
}
if (!gain->chan) {
chan = chan_from_file(file);
} else {
if (valid_channo(gain->chan))
chan = chans[gain->chan];
else
chan = NULL;
}
chan = (!gain->chan) ? chan_from_file(file) :
chan_from_num(gain->chan);
if (chan) {
res = -EINVAL;
goto cleanup;
@ -3715,15 +3707,8 @@ static int dahdi_ioctl_setgains(struct file *file, unsigned long data)
goto cleanup;
}
if (!gain->chan) {
chan = chan_from_file(file);
} else {
if (valid_channo(gain->chan))
chan = chans[gain->chan];
else
chan = NULL;
}
chan = (!gain->chan) ? chan_from_file(file) :
chan_from_num(gain->chan);
if (!chan) {
res = -EINVAL;
goto cleanup;
@ -3793,8 +3778,7 @@ static int dahdi_ioctl_chandiag(struct file *file, unsigned long data)
/* get channel number from user */
get_user(channo, (int __user *)data);
VALID_CHANNEL(channo);
chan = chans[channo];
chan = chan_from_num(channo);
if (!chan)
return -EINVAL;
@ -3868,14 +3852,10 @@ static int dahdi_ioctl_getparams(struct file *file, unsigned long data)
}
/* Pick the right channo's */
chan = file->private_data;
if (!param.channo || chan) {
param.channo = chan->channo;
} else {
/* Check validity of channel */
VALID_CHANNEL(param.channo);
chan = chans[param.channo];
}
chan = chan_from_file(file);
if (!chan)
chan = chan_from_num(param.channo);
if (!chan)
return -EINVAL;
@ -3968,14 +3948,9 @@ static int dahdi_ioctl_setparams(struct file *file, unsigned long data)
param.chan_alarms = 0; /* be explicit about the above */
/* Pick the right channo's */
chan = file->private_data;
if (!param.channo || chan) {
param.channo = chan->channo;
} else {
/* Check validity of channel */
VALID_CHANNEL(param.channo);
chan = chans[param.channo];
}
chan = chan_from_file(file);
if (!chan)
chan = chan_from_num(param.channo);
if (!chan)
return -EINVAL;
@ -4266,25 +4241,23 @@ static int dahdi_ioctl_chanconfig(struct file *file, unsigned long data)
if (copy_from_user(&ch, (void __user *)data, sizeof(ch)))
return -EFAULT;
VALID_CHANNEL(ch.chan);
chan = chan_from_num(ch.chan);
if (!chan)
return -EINVAL;
if (ch.sigtype == DAHDI_SIG_SLAVE) {
/* We have to use the master's sigtype */
if ((ch.master < 1) || (ch.master >= DAHDI_MAX_CHANNELS))
newmaster = chan_from_num(ch.master);
if (!newmaster)
return -EINVAL;
if (!chans[ch.master])
return -EINVAL;
ch.sigtype = chans[ch.master]->sig;
newmaster = chans[ch.master];
ch.sigtype = newmaster->sig;
} else if ((ch.sigtype & __DAHDI_SIG_DACS) == __DAHDI_SIG_DACS) {
newmaster = chans[ch.chan];
if ((ch.idlebits < 1) || (ch.idlebits >= DAHDI_MAX_CHANNELS))
return -EINVAL;
if (!chans[ch.idlebits])
newmaster = chan;
if (!chan_from_num(ch.idlebits))
return -EINVAL;
} else {
newmaster = chans[ch.chan];
newmaster = chan;
}
chan = chans[ch.chan];
spin_lock_irqsave(&chan->lock, flags);
#ifdef CONFIG_DAHDI_NET
if (chan->flags & DAHDI_FLAG_NETDEV) {
@ -4360,8 +4333,7 @@ static int dahdi_ioctl_chanconfig(struct file *file, unsigned long data)
/* Setup conference properly */
chan->confmode = DAHDI_CONF_DIGITALMON;
chan->confna = ch.idlebits;
res = dahdi_chan_dacs(chan,
chans[ch.idlebits]);
res = dahdi_chan_dacs(chan, chan_from_num(ch.idlebits));
} else {
dahdi_disable_dacs(chan);
}
@ -4477,8 +4449,7 @@ static int dahdi_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long da
if (copy_from_user(&ind, (void __user *)data, sizeof(ind)))
return -EFAULT;
VALID_CHANNEL(ind.chan);
chan = chans[ind.chan];
chan = chan_from_num(ind.chan);
if (!chan)
return -EINVAL;
@ -4579,7 +4550,9 @@ static int dahdi_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long da
if (copy_from_user(&ae, (void __user *)data, sizeof(ae)))
return -EFAULT;
VALID_CHANNEL(ae.chan);
chan = chan_from_num(ae.chan);
if (!chan)
return -EINVAL;
ae.echocan[sizeof(ae.echocan) - 1] = 0;
if (ae.echocan[0]) {
@ -4588,10 +4561,10 @@ static int dahdi_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long da
}
}
spin_lock_irqsave(&chans[ae.chan]->lock, flags);
old = chans[ae.chan]->ec_factory;
chans[ae.chan]->ec_factory = new;
spin_unlock_irqrestore(&chans[ae.chan]->lock, flags);
spin_lock_irqsave(&chan->lock, flags);
old = chan->ec_factory;
chan->ec_factory = new;
spin_unlock_irqrestore(&chan->lock, flags);
if (old) {
release_echocan(old);
@ -4608,29 +4581,34 @@ static int dahdi_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long da
if (copy_from_user(&sf, (void __user *)data, sizeof(sf)))
return -EFAULT;
VALID_CHANNEL(sf.chan);
if (chans[sf.chan]->sig != DAHDI_SIG_SF) return -EINVAL;
spin_lock_irqsave(&chans[sf.chan]->lock, flags);
chans[sf.chan]->rxp1 = sf.rxp1;
chans[sf.chan]->rxp2 = sf.rxp2;
chans[sf.chan]->rxp3 = sf.rxp3;
chans[sf.chan]->txtone = sf.txtone;
chans[sf.chan]->tx_v2 = sf.tx_v2;
chans[sf.chan]->tx_v3 = sf.tx_v3;
chans[sf.chan]->toneflags = sf.toneflag;
chan = chan_from_num(sf.chan);
if (!chan)
return -EINVAL;
if (chan->sig != DAHDI_SIG_SF)
return -EINVAL;
spin_lock_irqsave(&chan->lock, flags);
chan->rxp1 = sf.rxp1;
chan->rxp2 = sf.rxp2;
chan->rxp3 = sf.rxp3;
chan->txtone = sf.txtone;
chan->tx_v2 = sf.tx_v2;
chan->tx_v3 = sf.tx_v3;
chan->toneflags = sf.toneflag;
if (sf.txtone) /* if set to make tone for tx */
{
if ((chans[sf.chan]->txhooksig && !(sf.toneflag & DAHDI_REVERSE_TXTONE)) ||
((!chans[sf.chan]->txhooksig) && (sf.toneflag & DAHDI_REVERSE_TXTONE)))
if ((chan->txhooksig && !(sf.toneflag & DAHDI_REVERSE_TXTONE)) ||
((!chan->txhooksig) && (sf.toneflag & DAHDI_REVERSE_TXTONE)))
{
set_txtone(chans[sf.chan],sf.txtone,sf.tx_v2,sf.tx_v3);
set_txtone(chan, sf.txtone, sf.tx_v2, sf.tx_v3);
}
else
{
set_txtone(chans[sf.chan],0,0,0);
set_txtone(chan, 0, 0, 0);
}
}
spin_unlock_irqrestore(&chans[sf.chan]->lock, flags);
spin_unlock_irqrestore(&chan->lock, flags);
return res;
}
case DAHDI_DEFAULTZONE:
@ -4891,6 +4869,7 @@ static int dahdi_ioctl_setconf(struct file *file, unsigned long data)
{
struct dahdi_confinfo conf;
struct dahdi_chan *chan;
struct dahdi_chan *conf_chan = NULL;
unsigned long flags;
unsigned int confmode;
int j;
@ -4900,25 +4879,17 @@ static int dahdi_ioctl_setconf(struct file *file, unsigned long data)
confmode = conf.confmode & DAHDI_CONF_MODE_MASK;
if (conf.chan) {
VALID_CHANNEL(conf.chan);
chan = chans[conf.chan];
} else {
if (file->private_data) {
chan = file->private_data;
} else {
VALID_CHANNEL(UNIT(file));
chan = chans[UNIT(file)];
}
}
chan = (conf.chan) ? chan_from_num(conf.chan) :
chan_from_file(file);
if (!chan)
return -EINVAL;
if (!(chan->flags & DAHDI_FLAG_AUDIO))
return -EINVAL;
if (is_monitor_mode(conf.confmode)) {
/* Monitor mode -- it's a channel */
if ((conf.confno < 0) || (conf.confno >= DAHDI_MAX_CHANNELS) ||
!chans[conf.confno])
conf_chan = chan_from_num(conf.confno);
if (!conf_chan)
return -EINVAL;
} else {
/* make sure conf number makes sense, too */
@ -4959,9 +4930,9 @@ static int dahdi_ioctl_setconf(struct file *file, unsigned long data)
if ((confmode == DAHDI_CONF_DIGITALMON) &&
(chan->txgain == defgain) &&
(chan->rxgain == defgain) &&
(chans[conf.confno]->txgain == defgain) &&
(chans[conf.confno]->rxgain == defgain)) {
dahdi_chan_dacs(chan, chans[conf.confno]);
(conf_chan->txgain == defgain) &&
(conf_chan->rxgain == defgain)) {
dahdi_chan_dacs(chan, conf_chan);
} else {
dahdi_disable_dacs(chan);
}
@ -4977,16 +4948,16 @@ static int dahdi_ioctl_setconf(struct file *file, unsigned long data)
chan->_confn = dahdi_get_conf_alias(conf.confno);
}
if (chans[conf.confno]) {
if (conf_chan) {
if ((confmode == DAHDI_CONF_MONITOR_RX_PREECHO) ||
(confmode == DAHDI_CONF_MONITOR_TX_PREECHO) ||
(confmode == DAHDI_CONF_MONITORBOTH_PREECHO)) {
void *temp = kmalloc(sizeof(*chan->readchunkpreec) *
DAHDI_CHUNKSIZE, GFP_ATOMIC);
chans[conf.confno]->readchunkpreec = temp;
conf_chan->readchunkpreec = temp;
} else {
kfree(chans[conf.confno]->readchunkpreec);
chans[conf.confno]->readchunkpreec = NULL;
kfree(conf_chan->readchunkpreec);
conf_chan->readchunkpreec = NULL;
}
}
@ -5005,13 +4976,9 @@ static int dahdi_ioctl_conflink(struct file *file, unsigned long data)
int res = 0;
int i;
if (file->private_data) {
chan = file->private_data;
} else {
VALID_CHANNEL(UNIT(file));
chan = chans[UNIT(file)];
}
chan = chan_from_file(file);
if (!chan)
return -EINVAL;
if (!(chan->flags & DAHDI_FLAG_AUDIO))
return -EINVAL;
if (copy_from_user(&conf, (void __user *)data, sizeof(conf)))
@ -5094,12 +5061,9 @@ static int dahdi_ioctl_confdiag(struct file *file, unsigned long data)
int c;
int k;
if (file->private_data) {
chan = file->private_data;
} else {
VALID_CHANNEL(UNIT(file));
chan = chans[UNIT(file)];
}
chan = chan_from_file(file);
if (!chan)
return -EINVAL;
if (!(chan->flags & DAHDI_FLAG_AUDIO))
return -EINVAL;
@ -5110,7 +5074,7 @@ static int dahdi_ioctl_confdiag(struct file *file, unsigned long data)
for (i = ((j) ? j : 1); i <= ((j) ? j : DAHDI_MAX_CONF); i++) {
c = 0;
for (k = 1; k < DAHDI_MAX_CHANNELS; k++) {
struct dahdi_chan *const pos = chans[k];
struct dahdi_chan *const pos = chan_from_num(k);
/* skip if no pointer */
if (!pos)
continue;
@ -5156,18 +5120,8 @@ static int dahdi_ioctl_getconf(struct file *file, unsigned long data)
if (copy_from_user(&conf, (void __user *)data, sizeof(conf)))
return -EFAULT;
if (!conf.chan) {
/* If 0, use the current channel. */
if (file->private_data) {
chan = file->private_data;
} else {
VALID_CHANNEL(UNIT(file));
chan = chans[UNIT(file)];
}
} else {
VALID_CHANNEL(conf.chan);
chan = chans[conf.chan];
}
chan = (!conf.chan) ? chan_from_file(file) :
chan_from_num(conf.chan);
if (!chan)
return -EINVAL;
@ -6088,11 +6042,9 @@ static int dahdi_prechan_ioctl(struct file *file, unsigned int cmd, unsigned lon
switch(cmd) {
case DAHDI_SPECIFY:
get_user(channo, (int __user *)data);
if (channo < 1)
file->private_data = chan_from_num(channo);
if (!file->private_data)
return -EINVAL;
if (channo > DAHDI_MAX_CHANNELS)
return -EINVAL;
file->private_data = chans[channo];
res = dahdi_specchan_open(file);
if (res)
file->private_data = NULL;