below is my script in brief, when it runs for several minutes , the
computer will reboot quickly without any information , so I can not
get knowledge form oops and something else .
I use timer and hook respectively, first , using hook to receive
packets from ICP/IP stack on wired interface, the store it in a queue
, then , when the timer arrive , the timer will invoke the
dev_queue_xmit() to send the whole packets from wireless interface.
void timer_ack(unsigned long no_used){
int i ;
struct sk_buff * skb;
struct net_device * wireless;
wireless = dev_get_by_name("eth1");//eth1 is wireless interface
while((skb=skb_dequeue(packet_queue))!=NULL){// get out a packet
from the queue
dev_queue_xmit(skb);
}
mod_timer(&timer,100);// change time for polling one time per second
}
unsigned int hook_func(unsigned int hooknum,struct sk_buff **skb,
const struct net_device *in,const struct net_device *out,int
(*okfn)(struct sk_buff *)){
// there , I omit some the code handling the packet for the purpose of
forwording like NAT , that means I will handle the packet firstly then
I will insert it to the packet_queue
struct sk_buff *sb = *skb;
skb_queue_tail(packet_queue,sb);
}
I test it , normally it can run for about five minutes , then died
without anyting info.
I analyze whether my improper handling on queue leads to it. maybe
there are some race conditions I can not find out.
the most important is whether the case below have the posibility to occur?
when the kernel run in timer then an interrupt comes , after
the interrupt return results in scheule or the hook_func()'s running ,
then the race condition will occur , I am not clear in this .
any help will be appreciated , thx~
:)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |