int toi_netlink_setup(struct user_helper_data *uhd)
{
/* In case userui didn't cleanup properly on us */
toi_netlink_close_complete(uhd);
if (netlink_prepare(uhd) < 0) {
printk(KERN_INFO "Netlink prepare failed.\n");
return 1;
}
if (toi_launch_userspace_program(uhd->program, uhd->netlink_id,
UMH_WAIT_EXEC, uhd->debug) < 0) {
printk(KERN_INFO "Launch userspace program failed.\n");
toi_netlink_close_complete(uhd);
return 1;
}
/* Wait 2 seconds for the userspace process to make contact */
wait_for_completion_timeout(&uhd->wait_for_process, 2*HZ);
if (uhd->pid == -1) {
printk(KERN_INFO "%s: Failed to contact userspace process.\n",
uhd->name);
toi_netlink_close_complete(uhd);
return 1;
}
return 0;
}
static int netlink_prepare(struct user_helper_data *uhd)
{
struct netlink_kernel_cfg cfg = {
.groups = 0,
.input = toi_user_rcv_skb,
};
uhd->next = uhd_list;
uhd_list = uhd;
uhd->sock_seq = 0x42c0ffee;
uhd->nl = netlink_kernel_create(&init_net, uhd->netlink_id, &cfg);
if (!uhd->nl) {
printk(KERN_INFO "Failed to allocate netlink socket for %s.\n",
uhd->name);
return -ENOMEM;
}
toi_fill_skb_pool(uhd);
return 0;
}
void toi_netlink_close(struct user_helper_data *uhd)
{
struct task_struct *t;
toi_read_lock_tasklist();
t = find_task_by_pid_ns(uhd->pid, &init_pid_ns);
if (t)
t->flags &= ~PF_NOFREEZE;
toi_read_unlock_tasklist();
toi_send_netlink_message(uhd, NETLINK_MSG_CLEANUP, NULL, 0);
}
EXPORT_SYMBOL_GPL(toi_netlink_close);
int toi_netlink_setup(struct user_helper_data *uhd)
{
/* In case userui didn't cleanup properly on us */
toi_netlink_close_complete(uhd);
if (netlink_prepare(uhd) < 0) {
printk(KERN_INFO "Netlink prepare failed.\n");
return 1;
}
if (toi_launch_userspace_program(uhd->program, uhd->netlink_id,
UMH_WAIT_EXEC, uhd->debug) < 0) {
printk(KERN_INFO "Launch userspace program failed.\n");
toi_netlink_close_complete(uhd);
return 1;
}
/* Wait 2 seconds for the userspace process to make contact */
wait_for_completion_timeout(&uhd->wait_for_process, 2*HZ);
if (uhd->pid == -1) {
printk(KERN_INFO "%s: Failed to contact userspace process.\n",
uhd->name);
toi_netlink_close_complete(uhd);
return 1;
}
return 0;
}