Hi On Sat, Aug 2, 2008 at 10:03 AM, c.j <c.james.cj@xxxxxxxxx> wrote: > Hi list, > > I'm having trouble about NF_HOOK() call. > I intent to add a netfilter hook with nf_register_hook. > THe hook point is NF_ARP_IN. But I'm not sure the caller's context. > > In kernel code, dev.c I found the caller: > netif_receive_skb -> arp_rcv -> NF_HOOK -> my_hook_cb > > When my_hook_cb is invoked, what's the context? And how can I detect it? Most likely interrupt context. Although it's not 100% accurate, try to use functions/macros like in_atomic(), in_interrupt(), in_softirq() to get an idea in which you're currently in. See http://lxr.linux.no/linux/include/linux/hardirq.h for more... regards, Mulyadi. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
