int skb_check(struct sk_buff *skb, int head, int line, char *file)
{
if (head) {
if (skb->magic_debug_cookie != SK_HEAD_SKB) {
printk("File: %s Line %d, found a bad skb-head\n",
file,line);
return -1;
}
if (!skb->next || !skb->prev) {
printk("skb_check: head without next or prev\n");
return -1;
}
if (skb->next->magic_debug_cookie != SK_HEAD_SKB
&& skb->next->magic_debug_cookie != SK_GOOD_SKB) {
printk("File: %s Line %d, bad next head-skb member\n",
file,line);
return -1;
}
if (skb->prev->magic_debug_cookie != SK_HEAD_SKB
&& skb->prev->magic_debug_cookie != SK_GOOD_SKB) {
printk("File: %s Line %d, bad prev head-skb member\n",
file,line);
return -1;
}
#if 0
{
struct sk_buff *skb2 = skb->next;
int i = 0;
while (skb2 != skb && i < 5) {
if (skb_check(skb2, 0, line, file) < 0) {
printk("bad queue element in whole queue\n");
return -1;
}
i++;
skb2 = skb2->next;
}
}
#endif
return 0;
}
if (skb->next != NULL && skb->next->magic_debug_cookie != SK_HEAD_SKB
&& skb->next->magic_debug_cookie != SK_GOOD_SKB) {
printk("File: %s Line %d, bad next skb member\n",
file,line);
return -1;
}
if (skb->prev != NULL && skb->prev->magic_debug_cookie != SK_HEAD_SKB
&& skb->prev->magic_debug_cookie != SK_GOOD_SKB) {
printk("File: %s Line %d, bad prev skb member\n",
file,line);
return -1;
}
if(skb->magic_debug_cookie==SK_FREED_SKB)
{
printk("File: %s Line %d, found a freed skb lurking in the undergrowth!\n",
file,line);
printk("skb=%p, real size=%d, free=%d\n",
skb,skb->truesize,skb->free);
return -1;
}
if(skb->magic_debug_cookie!=SK_GOOD_SKB)
{
printk("File: %s Line %d, passed a non skb!\n", file,line);
printk("skb=%p, real size=%d, free=%d\n",
skb,skb->truesize,skb->free);
return -1;
}
if(skb->head>skb->data)
{
printk("File: %s Line %d, head > data !\n", file,line);
printk("skb=%p, head=%p, data=%p\n",
skb,skb->head,skb->data);
return -1;
}
if(skb->tail>skb->end)
{
printk("File: %s Line %d, tail > end!\n", file,line);
printk("skb=%p, tail=%p, end=%p\n",
skb,skb->tail,skb->end);
return -1;
}
if(skb->data>skb->tail)
{
printk("File: %s Line %d, data > tail!\n", file,line);
printk("skb=%p, data=%p, tail=%p\n",
skb,skb->data,skb->tail);
return -1;
}
if(skb->tail-skb->data!=skb->len)
{
printk("File: %s Line %d, wrong length\n", file,line);
printk("skb=%p, data=%p, end=%p len=%ld\n",
skb,skb->data,skb->end,skb->len);
return -1;
}
if((unsigned long) skb->end > (unsigned long) skb)
{
printk("File: %s Line %d, control overrun\n", file,line);
printk("skb=%p, end=%p\n",
skb,skb->end);
return -1;
}
/* Guess it might be acceptable then */
return 0;
}
int skb_check(struct sk_buff *skb, int head, int line, char *file)
{
if (head) {
if (skb->magic_debug_cookie != SK_HEAD_SKB) {
printk("File: %s Line %d, found a bad skb-head\n",
file,line);
return -1;
}
if (!skb->next || !skb->prev) {
printk("skb_check: head without next or prev\n");
return -1;
}
if (skb->next->magic_debug_cookie != SK_HEAD_SKB
&& skb->next->magic_debug_cookie != SK_GOOD_SKB) {
printk("File: %s Line %d, bad next head-skb member\n",
file,line);
return -1;
}
if (skb->prev->magic_debug_cookie != SK_HEAD_SKB
&& skb->prev->magic_debug_cookie != SK_GOOD_SKB) {
printk("File: %s Line %d, bad prev head-skb member\n",
file,line);
return -1;
}
#if 0
{
struct sk_buff *skb2 = skb->next;
int i = 0;
while (skb2 != skb && i < 5) {
if (skb_check(skb2, 0, line, file) < 0) {
printk("bad queue element in whole queue\n");
return -1;
}
i++;
skb2 = skb2->next;
}
}
#endif
return 0;
}
if (skb->next != NULL && skb->next->magic_debug_cookie != SK_HEAD_SKB
&& skb->next->magic_debug_cookie != SK_GOOD_SKB) {
printk("File: %s Line %d, bad next skb member\n",
file,line);
return -1;
}
if (skb->prev != NULL && skb->prev->magic_debug_cookie != SK_HEAD_SKB
&& skb->prev->magic_debug_cookie != SK_GOOD_SKB) {
printk("File: %s Line %d, bad prev skb member\n",
file,line);
return -1;
}
if(skb->magic_debug_cookie==SK_FREED_SKB)
{
printk("File: %s Line %d, found a freed skb lurking in the undergrowth!\n",
file,line);
printk("skb=%p, real size=%ld, claimed size=%ld, free=%d\n",
skb,skb->truesize,skb->mem_len,skb->free);
return -1;
}
if(skb->magic_debug_cookie!=SK_GOOD_SKB)
{
printk("File: %s Line %d, passed a non skb!\n", file,line);
printk("skb=%p, real size=%ld, claimed size=%ld, free=%d\n",
skb,skb->truesize,skb->mem_len,skb->free);
return -1;
}
if(skb->mem_len!=skb->truesize)
{
printk("File: %s Line %d, Dubious size setting!\n",file,line);
printk("skb=%p, real size=%ld, claimed size=%ld\n",
skb,skb->truesize,skb->mem_len);
return -1;
}
/* Guess it might be acceptable then */
return 0;
}
