On Thu, Jun 01, 2017 at 02:25:26PM -0400, Joe Lawrence wrote:
> #include <linux/seq_file.h>
> +#include <linux/slab.h>
> static int livepatch_cmdline_proc_show(struct seq_file *m, void *v)
> {
> + struct task_ctr *nd;
> +
> + nd = klp_shadow_get(current, "task_ctr");
> + if (!nd) {
> + nd = kzalloc(sizeof(*nd), GFP_KERNEL);
> + if (nd) {
> + list_add(&nd->list, &shadow_list);
> + klp_shadow_attach(current, "task_ctr", GFP_KERNEL, nd);
> + }
> + }
> +
> seq_printf(m, "%s\n", "this has been live patched");
> +
> + if (nd) {
> + nd->count++;
> + seq_printf(m, "current=%p count=%d\n", current, nd->count);
> + }
> +
> return 0;
> }
>
> @@ -99,6 +130,12 @@ static int livepatch_init(void)
>
> static void livepatch_exit(void)
> {
> + struct task_ctr *nd, *tmp;
> +
> + list_for_each_entry_safe(nd, tmp, &shadow_list, list) {
> + list_del(&nd->list);
> + kfree(nd);
> + }
> WARN_ON(klp_unregister_patch(&patch));
> }
What does 'nd' stand for? I think a name like 'ctr' would be clearer.
--
Josh
