Hello Jan.
Can you please give me a description of wath is done in the rtskb_acquire
function in the rtskb.c file line 463.
The rtnet is crashing with an SIG=11 in this function when i pass the cloned
rtskb to the ETH_P_ALL socket.
My clone function is the following:
/** Clone a rtskb to another, allocating a rtskb for the copy */
int rtskb_clone(struct rtskb *rtskb_1,struct rtskb *rtskb_2,struct rtskb_queue
*pool)
{
rtskb_1 = alloc_rtskb(rtskb_2->len,pool);
if(rtskb_1 == NULL)
return -ENOMEM;
memcpy(rtskb_1->data, rtskb_2->data, rtskb_2->len );
rtskb_1->len = rtskb_2->len;
rtskb_1->time_stamp = rtskb_2->time_stamp;
rtskb_1->rtdev = rtskb_2->rtdev;
rtskb_1->protocol = rtskb_2->protocol;
return 0;
}
I check the path between the driver and the stack manager and only find that
these fields are necessary.
the task manager does the following for the clone rtskb:
list_for_each_entry(pt_entry, &rt_packets[hash], list_entry)
{
rt_printk("List entry protocol= %d %d name = %d\n",
ntohs(pt_entry->type),hash,strncmp(pt_entry->name,"PACKET_SOCKET",13));
//the "PACKET_SOCKET" string is defined in line 188 of file
af_packet.c
//this string should be replaced by a #define declaration
if ( likely(ntohs(pt_entry->type) == hash &&
(strncmp(pt_entry->name,"PACKET_SOCKET",13) == 0 )))
{
rtdm_lock_put_irqrestore(&rt_packets_lock, context);
// rt_printk("List entry 1 \n");
sock = container_of(pt_entry, struct rtsocket,
prot.packet.packet_type);
rtdm_lock_get_irqsave(&rt_packets_lock, context);
err = rtskb_clone(clone_skb, skb, &sock->skb_pool);
rtdm_lock_put_irqrestore(&rt_packets_lock, context);
if(err != 0)
{
break;
}
rtskb_queue_head(&sock->skb_pool,clone_skb);
//queue the message to fifo head here
rtdm_lock_get_irqsave(&rt_packets_lock, context);
pt_entry->refcount++;
rtdm_lock_put_irqrestore(&rt_packets_lock, context);
// rt_printk("List entry 2 \n");
err = pt_entry->handler(clone_skb, pt_entry);
// rt_printk("List entry 3 \n");
rtdm_lock_get_irqsave(&rt_packets_lock, context);
pt_entry->refcount--;
rtdm_lock_put_irqrestore(&rt_packets_lock, context);
}
}
I'm not sure if the cloned rtskb shoul be inserted in the queue head or not.
thanks
--
Jorge Almeida
[EMAIL PROTECTED]
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