Hi Jan, Thanks for your quick reply. Could you please give me some advices to accomplish the task? I need to pass the packet from kernel to a user space process to decide if the packet is accepted or denied. Best, Tung. On Wed, Jul 9, 2008 at 6:27 PM, Jan Engelhardt <jengelh@xxxxxxxxxx> wrote: > > On Thursday 2008-07-10 00:58, tung tran wrote: > >>Hi all, >>I am writing a kernel module that hooks into netfilter. >>netfilter_ops.hook = main_hook; >>netfilter_ops.pf = PF_INET; >>netfilter_ops.hooknum = NF_IP_PRE_ROUTING; >>netfilter_ops.priority = NF_IP_PRI_FIRST; >>nf_register_hook(&netfilter_ops); >> >>In the main_hook function, I needs to put the process to sleep and >>will be woken up by another process because the decision to Accept or >>Deny a packet depends on a process running in the user space. However, >>all sleeping mechanism I tried cause the kernel hang. > > You cannot sleep in an interrupt handler. > -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
