139 static u32 cpu_map_bpf_prog_run_skb(struct bpf_cpu_map_entry *rcpu,  in cpu_map_bpf_prog_run_skb()  argument
150 		act = bpf_prog_run_generic_xdp(skb, &xdp, rcpu->prog);  in cpu_map_bpf_prog_run_skb()
157 						      rcpu->prog);  in cpu_map_bpf_prog_run_skb()
166 			bpf_warn_invalid_xdp_action(NULL, rcpu->prog, act);  in cpu_map_bpf_prog_run_skb()
169 			trace_xdp_exception(skb->dev, rcpu->prog, act);  in cpu_map_bpf_prog_run_skb()
183 static int cpu_map_bpf_prog_run_xdp(struct bpf_cpu_map_entry *rcpu,  in cpu_map_bpf_prog_run_xdp()  argument
204 		act = bpf_prog_run_xdp(rcpu->prog, &xdp);  in cpu_map_bpf_prog_run_xdp()
217 					      rcpu->prog);  in cpu_map_bpf_prog_run_xdp()
226 			bpf_warn_invalid_xdp_action(NULL, rcpu->prog, act);  in cpu_map_bpf_prog_run_xdp()
247 static void cpu_map_bpf_prog_run(struct bpf_cpu_map_entry *rcpu, void **frames,  in cpu_map_bpf_prog_run()  argument
253 	if (!rcpu->prog)  in cpu_map_bpf_prog_run()
260 	ret->xdp_n = cpu_map_bpf_prog_run_xdp(rcpu, frames, ret->xdp_n, stats);  in cpu_map_bpf_prog_run()
262 		ret->skb_n = cpu_map_bpf_prog_run_skb(rcpu, skbs, ret->skb_n,  in cpu_map_bpf_prog_run()
277 static void cpu_map_gro_flush(struct bpf_cpu_map_entry *rcpu, bool empty)  in cpu_map_gro_flush()  argument
287 	gro_flush_normal(&rcpu->gro, !empty && HZ >= 1000);  in cpu_map_gro_flush()
292 	struct bpf_cpu_map_entry *rcpu = data;  in cpu_map_kthread_run()  local
296 	complete(&rcpu->kthread_running);  in cpu_map_kthread_run()
304 	while (!kthread_should_stop() || !__ptr_ring_empty(rcpu->queue)) {  in cpu_map_kthread_run()
314 		if (__ptr_ring_empty(rcpu->queue)) {  in cpu_map_kthread_run()
317 			if (__ptr_ring_empty(rcpu->queue)) {  in cpu_map_kthread_run()
334 		n = __ptr_ring_consume_batched(rcpu->queue, frames,  in cpu_map_kthread_run()
361 		cpu_map_bpf_prog_run(rcpu, frames, skbs, &ret, &stats);  in cpu_map_kthread_run()
389 		trace_xdp_cpumap_kthread(rcpu->map_id, n, kmem_alloc_drops,  in cpu_map_kthread_run()
393 			gro_receive_skb(&rcpu->gro, skbs[i]);  in cpu_map_kthread_run()
397 		empty = __ptr_ring_empty(rcpu->queue);  in cpu_map_kthread_run()
399 			cpu_map_gro_flush(rcpu, empty);  in cpu_map_kthread_run()
410 static int __cpu_map_load_bpf_program(struct bpf_cpu_map_entry *rcpu,  in __cpu_map_load_bpf_program()  argument
425 	rcpu->value.bpf_prog.id = prog->aux->id;  in __cpu_map_load_bpf_program()
426 	rcpu->prog = prog;  in __cpu_map_load_bpf_program()
437 	struct bpf_cpu_map_entry *rcpu;  in __cpu_map_entry_alloc()  local
443 	rcpu = bpf_map_kmalloc_node(map, sizeof(*rcpu), gfp | __GFP_ZERO, numa);  in __cpu_map_entry_alloc()
444 	if (!rcpu)  in __cpu_map_entry_alloc()
448 	rcpu->bulkq = bpf_map_alloc_percpu(map, sizeof(*rcpu->bulkq),  in __cpu_map_entry_alloc()
450 	if (!rcpu->bulkq)  in __cpu_map_entry_alloc()
454 		bq = per_cpu_ptr(rcpu->bulkq, i);  in __cpu_map_entry_alloc()
455 		bq->obj = rcpu;  in __cpu_map_entry_alloc()
460 	rcpu->queue = bpf_map_kmalloc_node(map, sizeof(*rcpu->queue), gfp,  in __cpu_map_entry_alloc()
462 	if (!rcpu->queue)  in __cpu_map_entry_alloc()
465 	err = ptr_ring_init(rcpu->queue, value->qsize, gfp);  in __cpu_map_entry_alloc()
469 	rcpu->cpu    = cpu;  in __cpu_map_entry_alloc()
470 	rcpu->map_id = map->id;  in __cpu_map_entry_alloc()
471 	rcpu->value.qsize  = value->qsize;  in __cpu_map_entry_alloc()
472 	gro_init(&rcpu->gro);  in __cpu_map_entry_alloc()
475 		err = __cpu_map_load_bpf_program(rcpu, map, fd);  in __cpu_map_entry_alloc()
481 	init_completion(&rcpu->kthread_running);  in __cpu_map_entry_alloc()
482 	rcpu->kthread = kthread_create_on_node(cpu_map_kthread_run, rcpu, numa,  in __cpu_map_entry_alloc()
485 	if (IS_ERR(rcpu->kthread)) {  in __cpu_map_entry_alloc()
486 		err = PTR_ERR(rcpu->kthread);  in __cpu_map_entry_alloc()
491 	kthread_bind(rcpu->kthread, cpu);  in __cpu_map_entry_alloc()
492 	wake_up_process(rcpu->kthread);  in __cpu_map_entry_alloc()
498 	wait_for_completion(&rcpu->kthread_running);  in __cpu_map_entry_alloc()
500 	return rcpu;  in __cpu_map_entry_alloc()
503 	if (rcpu->prog)  in __cpu_map_entry_alloc()
504 		bpf_prog_put(rcpu->prog);  in __cpu_map_entry_alloc()
506 	gro_cleanup(&rcpu->gro);  in __cpu_map_entry_alloc()
507 	ptr_ring_cleanup(rcpu->queue, NULL);  in __cpu_map_entry_alloc()
509 	kfree(rcpu->queue);  in __cpu_map_entry_alloc()
511 	free_percpu(rcpu->bulkq);  in __cpu_map_entry_alloc()
513 	kfree(rcpu);  in __cpu_map_entry_alloc()
519 	struct bpf_cpu_map_entry *rcpu;  in __cpu_map_entry_free()  local
526 	rcpu = container_of(to_rcu_work(work), struct bpf_cpu_map_entry, free_work);  in __cpu_map_entry_free()
532 	kthread_stop(rcpu->kthread);  in __cpu_map_entry_free()
534 	if (rcpu->prog)  in __cpu_map_entry_free()
535 		bpf_prog_put(rcpu->prog);  in __cpu_map_entry_free()
536 	gro_cleanup(&rcpu->gro);  in __cpu_map_entry_free()
538 	__cpu_map_ring_cleanup(rcpu->queue);  in __cpu_map_entry_free()
539 	ptr_ring_cleanup(rcpu->queue, NULL);  in __cpu_map_entry_free()
540 	kfree(rcpu->queue);  in __cpu_map_entry_free()
541 	free_percpu(rcpu->bulkq);  in __cpu_map_entry_free()
542 	kfree(rcpu);  in __cpu_map_entry_free()
554 				    u32 key_cpu, struct bpf_cpu_map_entry *rcpu)  in __cpu_map_entry_replace()  argument
558 	old_rcpu = unrcu_pointer(xchg(&cmap->cpu_map[key_cpu], RCU_INITIALIZER(rcpu)));  in __cpu_map_entry_replace()
583 	struct bpf_cpu_map_entry *rcpu;  in cpu_map_update_elem()  local
603 		rcpu = NULL; /* Same as deleting */  in cpu_map_update_elem()
606 		rcpu = __cpu_map_entry_alloc(map, &cpumap_value, key_cpu);  in cpu_map_update_elem()
607 		if (IS_ERR(rcpu))  in cpu_map_update_elem()
608 			return PTR_ERR(rcpu);  in cpu_map_update_elem()
611 	__cpu_map_entry_replace(cmap, key_cpu, rcpu);  in cpu_map_update_elem()
635 		struct bpf_cpu_map_entry *rcpu;  in cpu_map_free()  local
637 		rcpu = rcu_dereference_raw(cmap->cpu_map[i]);  in cpu_map_free()
638 		if (!rcpu)  in cpu_map_free()
642 		__cpu_map_entry_free(&rcpu->free_work.work);  in cpu_map_free()
655 	struct bpf_cpu_map_entry *rcpu;  in __cpu_map_lookup_elem()  local
660 	rcpu = rcu_dereference_check(cmap->cpu_map[key],  in __cpu_map_lookup_elem()
662 	return rcpu;  in __cpu_map_lookup_elem()
667 	struct bpf_cpu_map_entry *rcpu =  in cpu_map_lookup_elem()  local
670 	return rcpu ? &rcpu->value : NULL;  in cpu_map_lookup_elem()
722 	struct bpf_cpu_map_entry *rcpu = bq->obj;  in bq_flush_to_queue()  local
724 	const int to_cpu = rcpu->cpu;  in bq_flush_to_queue()
733 	q = rcpu->queue;  in bq_flush_to_queue()
753 	trace_xdp_cpumap_enqueue(rcpu->map_id, processed, drops, to_cpu);  in bq_flush_to_queue()
760 static void bq_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf)  in bq_enqueue()  argument
764 	local_lock_nested_bh(&rcpu->bulkq->bq_lock);  in bq_enqueue()
765 	bq = this_cpu_ptr(rcpu->bulkq);  in bq_enqueue()
787 	local_unlock_nested_bh(&rcpu->bulkq->bq_lock);  in bq_enqueue()
790 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf,  in cpu_map_enqueue()  argument
796 	bq_enqueue(rcpu, xdpf);  in cpu_map_enqueue()
800 int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,  in cpu_map_generic_redirect()  argument
809 	ret = ptr_ring_produce(rcpu->queue, skb);  in cpu_map_generic_redirect()
813 	wake_up_process(rcpu->kthread);  in cpu_map_generic_redirect()
815 	trace_xdp_cpumap_enqueue(rcpu->map_id, !ret, !!ret, rcpu->cpu);  in cpu_map_generic_redirect()