kernel/bpf/trampoline.c

615 	struct bpf_shim_tramp_link *shim_link =
618 	/* paired with 'shim_link->trampoline = tr' in bpf_trampoline_link_cgroup_shim */
619 	if (!shim_link->trampoline)
622 	WARN_ON_ONCE(bpf_trampoline_unlink_prog(&shim_link->link, shim_link->trampoline));
623 	bpf_trampoline_put(shim_link->trampoline);
628 	struct bpf_shim_tramp_link *shim_link =
631 	kfree(shim_link);
643 	struct bpf_shim_tramp_link *shim_link = NULL;
646 	shim_link = kzalloc(sizeof(*shim_link), GFP_USER);
647 	if (!shim_link)
652 		kfree(shim_link);
667 	bpf_link_init(&shim_link->link.link, BPF_LINK_TYPE_UNSPEC,
671 	return shim_link;
695 	struct bpf_shim_tramp_link *shim_link = NULL;
718 	shim_link = cgroup_shim_find(tr, bpf_func);
719 	if (shim_link) {
721 		bpf_link_inc(&shim_link->link.link);
730 	shim_link = cgroup_shim_alloc(prog, bpf_func, cgroup_atype);
731 	if (!shim_link) {
736 	err = __bpf_trampoline_link_prog(&shim_link->link, tr);
740 	shim_link->trampoline = tr;
749 	if (shim_link)
750 		bpf_link_put(&shim_link->link.link);
760 	struct bpf_shim_tramp_link *shim_link = NULL;
774 	shim_link = cgroup_shim_find(tr, bpf_func);
777 	if (shim_link)
778 		bpf_link_put(&shim_link->link.link);