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Commit 7da34c58 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo Committed by David S. Miller
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o X25: Simplify ioctl code, CodingStyle cleanups

parent 5716f023
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Showing with 123 additions and 120 deletions
net/x25/x25_link.c
View file @ 7da34c58
/*
* X.25 Packet Layer release 002
*
* This is ALPHA test software. This code may break your machine, randomly fail to work with new
* releases, misbehave and/or generally screw up. It might even work.
* This is ALPHA test software. This code may break your machine,
* randomly fail to work with new releases, misbehave and/or generally
* screw up. It might even work.
*
* This code REQUIRES 2.1.15 or higher
*
......@@ -42,7 +43,7 @@
#include <linux/init.h>
#include <net/x25.h>
static struct x25_neigh *x25_neigh_list /* = NULL initially */;
static struct x25_neigh *x25_neigh_list; /* = NULL initially */
static void x25_t20timer_expiry(unsigned long);
......@@ -82,7 +83,8 @@ static int x25_t20timer_pending(struct x25_neigh *neigh)
/*
* This handles all restart and diagnostic frames.
*/
void x25_link_control(struct sk_buff *skb, struct x25_neigh *neigh, unsigned short frametype)
void x25_link_control(struct sk_buff *skb, struct x25_neigh *neigh,
unsigned short frametype)
{
struct sk_buff *skbn;
int confirm;
......@@ -92,7 +94,8 @@ void x25_link_control(struct sk_buff *skb, struct x25_neigh *neigh, unsigned sho
confirm = !x25_t20timer_pending(neigh);
x25_stop_t20timer(neigh);
neigh->state = X25_LINK_STATE_3;
if (confirm) x25_transmit_restart_confirmation(neigh);
if (confirm)
x25_transmit_restart_confirmation(neigh);
break;
case X25_RESTART_CONFIRMATION:
......@@ -101,18 +104,21 @@ void x25_link_control(struct sk_buff *skb, struct x25_neigh *neigh, unsigned sho
break;
case X25_DIAGNOSTIC:
printk(KERN_WARNING "x25: diagnostic #%d - %02X %02X %02X\n", skb->data[3], skb->data[4], skb->data[5], skb->data[6]);
printk(KERN_WARNING "x25: diagnostic #%d - "
"%02X %02X %02X\n",
skb->data[3], skb->data[4],
skb->data[5], skb->data[6]);
break;
default:
printk(KERN_WARNING "x25: received unknown %02X with LCI 000\n", frametype);
printk(KERN_WARNING "x25: received unknown %02X "
"with LCI 000\n", frametype);
break;
}
if (neigh->state == X25_LINK_STATE_3) {
if (neigh->state == X25_LINK_STATE_3)
while ((skbn = skb_dequeue(&neigh->queue)) != NULL)
x25_send_frame(skbn, neigh);
}
}
/*
......@@ -120,20 +126,18 @@ void x25_link_control(struct sk_buff *skb, struct x25_neigh *neigh, unsigned sho
*/
void x25_transmit_restart_request(struct x25_neigh *neigh)
{
struct sk_buff *skb;
unsigned char *dptr;
int len;
len = X25_MAX_L2_LEN + X25_STD_MIN_LEN + 2;
int len = X25_MAX_L2_LEN + X25_STD_MIN_LEN + 2;
struct sk_buff *skb = alloc_skb(len, GFP_ATOMIC);
if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
if (!skb)
return;
skb_reserve(skb, X25_MAX_L2_LEN);
dptr = skb_put(skb, X25_STD_MIN_LEN + 2);
*dptr++ = (neigh->extended) ? X25_GFI_EXTSEQ : X25_GFI_STDSEQ;
*dptr++ = neigh->extended ? X25_GFI_EXTSEQ : X25_GFI_STDSEQ;
*dptr++ = 0x00;
*dptr++ = X25_RESTART_REQUEST;
*dptr++ = 0x00;
......@@ -149,20 +153,18 @@ void x25_transmit_restart_request(struct x25_neigh *neigh)
*/
void x25_transmit_restart_confirmation(struct x25_neigh *neigh)
{
struct sk_buff *skb;
unsigned char *dptr;
int len;
len = X25_MAX_L2_LEN + X25_STD_MIN_LEN;
int len = X25_MAX_L2_LEN + X25_STD_MIN_LEN;
struct sk_buff *skb = alloc_skb(len, GFP_ATOMIC);
if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
if (!skb)
return;
skb_reserve(skb, X25_MAX_L2_LEN);
dptr = skb_put(skb, X25_STD_MIN_LEN);
*dptr++ = (neigh->extended) ? X25_GFI_EXTSEQ : X25_GFI_STDSEQ;
*dptr++ = neigh->extended ? X25_GFI_EXTSEQ : X25_GFI_STDSEQ;
*dptr++ = 0x00;
*dptr++ = X25_RESTART_CONFIRMATION;
......@@ -176,20 +178,18 @@ void x25_transmit_restart_confirmation(struct x25_neigh *neigh)
*/
void x25_transmit_diagnostic(struct x25_neigh *neigh, unsigned char diag)
{
struct sk_buff *skb;
unsigned char *dptr;
int len;
int len = X25_MAX_L2_LEN + X25_STD_MIN_LEN + 1;
struct sk_buff *skb = alloc_skb(len, GFP_ATOMIC);
len = X25_MAX_L2_LEN + X25_STD_MIN_LEN + 1;
if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
if (!skb)
return;
skb_reserve(skb, X25_MAX_L2_LEN);
dptr = skb_put(skb, X25_STD_MIN_LEN + 1);
*dptr++ = (neigh->extended) ? X25_GFI_EXTSEQ : X25_GFI_STDSEQ;
*dptr++ = neigh->extended ? X25_GFI_EXTSEQ : X25_GFI_STDSEQ;
*dptr++ = 0x00;
*dptr++ = X25_DIAGNOSTIC;
*dptr++ = diag;
......@@ -205,21 +205,20 @@ void x25_transmit_diagnostic(struct x25_neigh *neigh, unsigned char diag)
*/
void x25_transmit_clear_request(struct x25_neigh *neigh, unsigned int lci, unsigned char cause)
{
struct sk_buff *skb;
unsigned char *dptr;
int len;
len = X25_MAX_L2_LEN + X25_STD_MIN_LEN + 2;
int len = X25_MAX_L2_LEN + X25_STD_MIN_LEN + 2;
struct sk_buff *skb = alloc_skb(len, GFP_ATOMIC);
if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
if (!skb)
return;
skb_reserve(skb, X25_MAX_L2_LEN);
dptr = skb_put(skb, X25_STD_MIN_LEN + 2);
*dptr++ = ((lci >> 8) & 0x0F) | (neigh->extended) ? X25_GFI_EXTSEQ : X25_GFI_STDSEQ;
*dptr++ = ((lci >> 0) & 0xFF);
*dptr++ = ((lci >> 8) & 0x0F) | neigh->extended ? X25_GFI_EXTSEQ :
X25_GFI_STDSEQ;
*dptr++ = (lci >> 0) & 0xFF;
*dptr++ = X25_CLEAR_REQUEST;
*dptr++ = cause;
*dptr++ = 0x00;
......@@ -281,10 +280,10 @@ void x25_link_terminated(struct x25_neigh *neigh)
*/
void x25_link_device_up(struct net_device *dev)
{
struct x25_neigh *x25_neigh;
unsigned long flags;
struct x25_neigh *x25_neigh = kmalloc(sizeof(*x25_neigh), GFP_ATOMIC);
if ((x25_neigh = kmalloc(sizeof(*x25_neigh), GFP_ATOMIC)) == NULL)
if (!x25_neigh)
return;
skb_queue_head_init(&x25_neigh->queue);
......@@ -295,7 +294,13 @@ void x25_link_device_up(struct net_device *dev)
x25_neigh->dev = dev;
x25_neigh->state = X25_LINK_STATE_0;
x25_neigh->extended = 0;
x25_neigh->global_facil_mask = (X25_MASK_REVERSE | X25_MASK_THROUGHPUT | X25_MASK_PACKET_SIZE | X25_MASK_WINDOW_SIZE); /* enables negotiation */
/*
* Enables negotiation
*/
x25_neigh->global_facil_mask = X25_MASK_REVERSE |
X25_MASK_THROUGHPUT |
X25_MASK_PACKET_SIZE |
X25_MASK_WINDOW_SIZE;
x25_neigh->t20 = sysctl_x25_restart_request_timeout;
save_flags(flags); cli();
......@@ -317,23 +322,23 @@ static void x25_remove_neigh(struct x25_neigh *x25_neigh)
if ((s = x25_neigh_list) == x25_neigh) {
x25_neigh_list = x25_neigh->next;
restore_flags(flags);
kfree(x25_neigh);
return;
goto out_kfree_neigh;
}
while (s != NULL && s->next != NULL) {
while (s && s->next) {
if (s->next == x25_neigh) {
s->next = x25_neigh->next;
restore_flags(flags);
kfree(x25_neigh);
return;
goto out_kfree_neigh;
}
s = s->next;
}
out:
restore_flags(flags);
return;
out_kfree_neigh:
kfree(x25_neigh);
goto out;
}
/*
......@@ -343,11 +348,11 @@ void x25_link_device_down(struct net_device *dev)
{
struct x25_neigh *neigh, *x25_neigh = x25_neigh_list;
while (x25_neigh != NULL) {
while (x25_neigh) {
neigh = x25_neigh;
x25_neigh = x25_neigh->next;
if (neigh->dev == dev){
if (neigh->dev == dev) {
x25_remove_neigh(neigh);
dev_put(dev);
}
......@@ -359,13 +364,13 @@ void x25_link_device_down(struct net_device *dev)
*/
struct x25_neigh *x25_get_neigh(struct net_device *dev)
{
struct x25_neigh *x25_neigh;
struct x25_neigh *x25_neigh = x25_neigh_list;
for (x25_neigh = x25_neigh_list; x25_neigh != NULL; x25_neigh = x25_neigh->next)
for (; x25_neigh; x25_neigh = x25_neigh->next)
if (x25_neigh->dev == dev)
return x25_neigh;
break;
return NULL;
return x25_neigh;
}
/*
......@@ -376,46 +381,42 @@ int x25_subscr_ioctl(unsigned int cmd, void *arg)
struct x25_subscrip_struct x25_subscr;
struct x25_neigh *x25_neigh;
struct net_device *dev;
switch (cmd) {
case SIOCX25GSUBSCRIP:
if (copy_from_user(&x25_subscr, arg, sizeof(struct x25_subscrip_struct)))
return -EFAULT;
if ((dev = x25_dev_get(x25_subscr.device)) == NULL)
return -EINVAL;
if ((x25_neigh = x25_get_neigh(dev)) == NULL) {
dev_put(dev);
return -EINVAL;
}
dev_put(dev);
x25_subscr.extended = x25_neigh->extended;
x25_subscr.global_facil_mask = x25_neigh->global_facil_mask;
if (copy_to_user(arg, &x25_subscr, sizeof(struct x25_subscrip_struct)))
return -EFAULT;
break;
case SIOCX25SSUBSCRIP:
if (copy_from_user(&x25_subscr, arg, sizeof(struct x25_subscrip_struct)))
return -EFAULT;
if ((dev = x25_dev_get(x25_subscr.device)) == NULL)
return -EINVAL;
if ((x25_neigh = x25_get_neigh(dev)) == NULL) {
dev_put(dev);
return -EINVAL;
}
dev_put(dev);
if (x25_subscr.extended != 0 && x25_subscr.extended != 1)
return -EINVAL;
x25_neigh->extended = x25_subscr.extended;
x25_neigh->global_facil_mask = x25_subscr.global_facil_mask;
break;
default:
return -EINVAL;
int rc = -EINVAL;
if (cmd != SIOCX25GSUBSCRIP && cmd != SIOCX25SSUBSCRIP)
goto out;
rc = -EFAULT;
if (copy_from_user(&x25_subscr, arg, sizeof(x25_subscr)))
goto out;
rc = -EINVAL;
if ((dev = x25_dev_get(x25_subscr.device)) == NULL)
goto out;
if ((x25_neigh = x25_get_neigh(dev)) == NULL)
goto out_put;
dev_put(dev);
if (cmd == SIOCX25GSUBSCRIP) {
x25_subscr.extended = x25_neigh->extended;
x25_subscr.global_facil_mask = x25_neigh->global_facil_mask;
rc = copy_to_user(arg, &x25_subscr,
sizeof(x25_subscr)) ? -EFAULT : 0;
} else {
rc = -EINVAL;
if (x25_subscr.extended && x25_subscr.extended != 1)
goto out;
rc = 0;
x25_neigh->extended = x25_subscr.extended;
x25_neigh->global_facil_mask = x25_subscr.global_facil_mask;
}
return 0;
out:
return rc;
out_put:
dev_put(dev);
goto out;
}
......@@ -426,7 +427,7 @@ void __exit x25_link_free(void)
{
struct x25_neigh *neigh, *x25_neigh = x25_neigh_list;
while (x25_neigh != NULL) {
while (x25_neigh) {
neigh = x25_neigh;
x25_neigh = x25_neigh->next;
......
net/x25/x25_out.c
View file @ 7da34c58
/*
* X.25 Packet Layer release 002
*
* This is ALPHA test software. This code may break your machine, randomly fail to work with new
* releases, misbehave and/or generally screw up. It might even work.
* This is ALPHA test software. This code may break your machine,
* randomly fail to work with new releases, misbehave and/or generally
* screw up. It might even work.
*
* This code REQUIRES 2.1.15 or higher
*
......@@ -45,7 +46,7 @@ static int x25_pacsize_to_bytes(unsigned int pacsize)
{
int bytes = 1;
if (pacsize == 0)
if (!pacsize)
return 128;
while (pacsize-- > 0)
......@@ -79,18 +80,21 @@ int x25_output(struct sock *sk, struct sk_buff *skb)
frontlen = skb_headroom(skb);
while (skb->len > 0) {
if ((skbn = sock_alloc_send_skb(sk, frontlen + max_len, noblock, &err)) == NULL){
if(err == -EWOULDBLOCK && noblock){
if ((skbn = sock_alloc_send_skb(sk, frontlen + max_len,
noblock, &err)) == NULL){
if (err == -EWOULDBLOCK && noblock){
kfree_skb(skb);
return sent;
}
SOCK_DEBUG(sk, "x25_output: fragment allocation failed, err=%d, %d bytes sent\n", err, sent);
SOCK_DEBUG(sk, "x25_output: fragment alloc"
" failed, err=%d, %d bytes "
"sent\n", err, sent);
return err;
}
skb_reserve(skbn, frontlen);
len = (max_len > skb->len) ? skb->len : max_len;
len = max_len > skb->len ? skb->len : max_len;
/* Copy the user data */
memcpy(skb_put(skbn, len), skb->data, len);
......@@ -127,7 +131,7 @@ static void x25_send_iframe(struct sock *sk, struct sk_buff *skb)
{
x25_cb *x25 = x25_sk(sk);
if (skb == NULL)
if (!skb)
return;
if (x25->neighbour->extended) {
......@@ -168,9 +172,9 @@ void x25_kick(struct sock *sk)
if (skb_peek(&sk->write_queue) == NULL)
return;
modulus = (x25->neighbour->extended) ? X25_EMODULUS : X25_SMODULUS;
modulus = x25->neighbour->extended ? X25_EMODULUS : X25_SMODULUS;
start = (skb_peek(&x25->ack_queue) == NULL) ? x25->va : x25->vs;
start = skb_peek(&x25->ack_queue) ? x25->vs : x25->va;
end = (x25->va + x25->facilities.winsize_out) % modulus;
if (start == end)
......
net/x25/x25_subr.c
View file @ 7da34c58
/*
* X.25 Packet Layer release 002
*
* This is ALPHA test software. This code may break your machine, randomly fail to work with new
* releases, misbehave and/or generally screw up. It might even work.
* This is ALPHA test software. This code may break your machine,
* randomly fail to work with new releases, misbehave and/or generally
* screw up. It might even work.
*
* This code REQUIRES 2.1.15 or higher
*
......@@ -15,7 +16,7 @@
* History
* X.25 001 Jonathan Naylor Started coding.
* X.25 002 Jonathan Naylor Centralised disconnection processing.
* mar/20/00 Daniela Squassoni Disabling/enabling of facilities
* mar/20/00 Daniela Squassoni Disabling/enabling of facilities
* negotiation.
* jun/24/01 Arnaldo C. Melo use skb_queue_purge, cleanups
*/
......@@ -88,7 +89,7 @@ void x25_requeue_frames(struct sock *sk)
* output queue.
*/
while ((skb = skb_dequeue(&x25_sk(sk)->ack_queue)) != NULL) {
if (skb_prev == NULL)
if (!skb_prev)
skb_queue_head(&sk->write_queue, skb);
else
skb_append(skb_prev, skb);
......@@ -107,14 +108,15 @@ int x25_validate_nr(struct sock *sk, unsigned short nr)
int modulus = x25->neighbour->extended ? X25_EMODULUS : X25_SMODULUS;
while (vc != x25->vs) {
if (nr == vc) return 1;
if (nr == vc)
return 1;
vc = (vc + 1) % modulus;
}
return nr == x25->vs ? 1 : 0;
}
/*
/*
* This routine is called when the packet layer internally generates a
* control frame.
*/
......@@ -126,12 +128,10 @@ void x25_write_internal(struct sock *sk, int frametype)
unsigned char facilities[X25_MAX_FAC_LEN];
unsigned char addresses[1 + X25_ADDR_LEN];
unsigned char lci1, lci2;
int len;
/*
* Default safe frame size.
*/
len = X25_MAX_L2_LEN + X25_EXT_MIN_LEN;
int len = X25_MAX_L2_LEN + X25_EXT_MIN_LEN;
/*
* Adjust frame size.
......
net/x25/x25_timer.c
View file @ 7da34c58
/*
* X.25 Packet Layer release 002
*
* This is ALPHA test software. This code may break your machine, randomly fail to work with new
* releases, misbehave and/or generally screw up. It might even work.
* This is ALPHA test software. This code may break your machine,
* randomly fail to work with new releases, misbehave and/or generally
* screw up. It might even work.
*
* This code REQUIRES 2.1.15 or higher
*
......@@ -130,9 +131,8 @@ static void x25_heartbeat_expiry(unsigned long param)
struct sock *sk = (struct sock *)param;
bh_lock_sock(sk);
if (sk->lock.users) { /* can currently only occur in state 3 */
if (sk->lock.users) /* can currently only occur in state 3 */
goto restart_heartbeat;
}
switch (x25_sk(sk)->state) {
......@@ -152,9 +152,9 @@ static void x25_heartbeat_expiry(unsigned long param)
x25_check_rbuf(sk);
break;
}
restart_heartbeat:
restart_heartbeat:
x25_start_heartbeat(sk);
unlock:
unlock:
bh_unlock_sock(sk);
}
......@@ -194,11 +194,9 @@ static void x25_timer_expiry(unsigned long param)
bh_lock_sock(sk);
if (sk->lock.users) { /* can currently only occur in state 3 */
if (x25_sk(sk)->state == X25_STATE_3) {
if (x25_sk(sk)->state == X25_STATE_3)
x25_start_t2timer(sk);
}
} else {
} else
x25_do_timer_expiry(sk);
}
bh_unlock_sock(sk);
}
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