127 static void get_cpu_map_entry(struct bpf_cpu_map_entry *rcpu)  in get_cpu_map_entry()  argument
129 	atomic_inc(&rcpu->refcnt);  in get_cpu_map_entry()
152 static void put_cpu_map_entry(struct bpf_cpu_map_entry *rcpu)  in put_cpu_map_entry()  argument
154 	if (atomic_dec_and_test(&rcpu->refcnt)) {  in put_cpu_map_entry()
155 		if (rcpu->prog)  in put_cpu_map_entry()
156 			bpf_prog_put(rcpu->prog);  in put_cpu_map_entry()
158 		__cpu_map_ring_cleanup(rcpu->queue);  in put_cpu_map_entry()
159 		ptr_ring_cleanup(rcpu->queue, NULL);  in put_cpu_map_entry()
160 		kfree(rcpu->queue);  in put_cpu_map_entry()
161 		kfree(rcpu);  in put_cpu_map_entry()
168 	struct bpf_cpu_map_entry *rcpu;  in cpu_map_kthread_stop()  local
170 	rcpu = container_of(work, struct bpf_cpu_map_entry, kthread_stop_wq);  in cpu_map_kthread_stop()
178 	kthread_stop(rcpu->kthread);  in cpu_map_kthread_stop()
181 static void cpu_map_bpf_prog_run_skb(struct bpf_cpu_map_entry *rcpu,  in cpu_map_bpf_prog_run_skb()  argument
191 		act = bpf_prog_run_generic_xdp(skb, &xdp, rcpu->prog);  in cpu_map_bpf_prog_run_skb()
198 						      rcpu->prog);  in cpu_map_bpf_prog_run_skb()
207 			bpf_warn_invalid_xdp_action(NULL, rcpu->prog, act);  in cpu_map_bpf_prog_run_skb()
210 			trace_xdp_exception(skb->dev, rcpu->prog, act);  in cpu_map_bpf_prog_run_skb()
221 static int cpu_map_bpf_prog_run_xdp(struct bpf_cpu_map_entry *rcpu,  in cpu_map_bpf_prog_run_xdp()  argument
243 		act = bpf_prog_run_xdp(rcpu->prog, &xdp);  in cpu_map_bpf_prog_run_xdp()
257 					      rcpu->prog);  in cpu_map_bpf_prog_run_xdp()
266 			bpf_warn_invalid_xdp_action(NULL, rcpu->prog, act);  in cpu_map_bpf_prog_run_xdp()
282 static int cpu_map_bpf_prog_run(struct bpf_cpu_map_entry *rcpu, void **frames,  in cpu_map_bpf_prog_run()  argument
288 	if (!rcpu->prog)  in cpu_map_bpf_prog_run()
293 	nframes = cpu_map_bpf_prog_run_xdp(rcpu, frames, xdp_n, stats);  in cpu_map_bpf_prog_run()
299 		cpu_map_bpf_prog_run_skb(rcpu, list, stats);  in cpu_map_bpf_prog_run()
308 	struct bpf_cpu_map_entry *rcpu = data;  in cpu_map_kthread_run()  local
310 	complete(&rcpu->kthread_running);  in cpu_map_kthread_run()
318 	while (!kthread_should_stop() || !__ptr_ring_empty(rcpu->queue)) {  in cpu_map_kthread_run()
328 		if (__ptr_ring_empty(rcpu->queue)) {  in cpu_map_kthread_run()
331 			if (__ptr_ring_empty(rcpu->queue)) {  in cpu_map_kthread_run()
346 		n = __ptr_ring_consume_batched(rcpu->queue, frames,  in cpu_map_kthread_run()
371 		nframes = cpu_map_bpf_prog_run(rcpu, frames, xdp_n, &stats, &list);  in cpu_map_kthread_run()
398 		trace_xdp_cpumap_kthread(rcpu->map_id, n, kmem_alloc_drops,  in cpu_map_kthread_run()
405 	put_cpu_map_entry(rcpu);  in cpu_map_kthread_run()
409 static int __cpu_map_load_bpf_program(struct bpf_cpu_map_entry *rcpu,  in __cpu_map_load_bpf_program()  argument
424 	rcpu->value.bpf_prog.id = prog->aux->id;  in __cpu_map_load_bpf_program()
425 	rcpu->prog = prog;  in __cpu_map_load_bpf_program()
436 	struct bpf_cpu_map_entry *rcpu;  in __cpu_map_entry_alloc()  local
442 	rcpu = bpf_map_kmalloc_node(map, sizeof(*rcpu), gfp | __GFP_ZERO, numa);  in __cpu_map_entry_alloc()
443 	if (!rcpu)  in __cpu_map_entry_alloc()
447 	rcpu->bulkq = bpf_map_alloc_percpu(map, sizeof(*rcpu->bulkq),  in __cpu_map_entry_alloc()
449 	if (!rcpu->bulkq)  in __cpu_map_entry_alloc()
453 		bq = per_cpu_ptr(rcpu->bulkq, i);  in __cpu_map_entry_alloc()
454 		bq->obj = rcpu;  in __cpu_map_entry_alloc()
458 	rcpu->queue = bpf_map_kmalloc_node(map, sizeof(*rcpu->queue), gfp,  in __cpu_map_entry_alloc()
460 	if (!rcpu->queue)  in __cpu_map_entry_alloc()
463 	err = ptr_ring_init(rcpu->queue, value->qsize, gfp);  in __cpu_map_entry_alloc()
467 	rcpu->cpu    = cpu;  in __cpu_map_entry_alloc()
468 	rcpu->map_id = map->id;  in __cpu_map_entry_alloc()
469 	rcpu->value.qsize  = value->qsize;  in __cpu_map_entry_alloc()
471 	if (fd > 0 && __cpu_map_load_bpf_program(rcpu, map, fd))  in __cpu_map_entry_alloc()
475 	init_completion(&rcpu->kthread_running);  in __cpu_map_entry_alloc()
476 	rcpu->kthread = kthread_create_on_node(cpu_map_kthread_run, rcpu, numa,  in __cpu_map_entry_alloc()
479 	if (IS_ERR(rcpu->kthread))  in __cpu_map_entry_alloc()
482 	get_cpu_map_entry(rcpu); /* 1-refcnt for being in cmap->cpu_map[] */  in __cpu_map_entry_alloc()
483 	get_cpu_map_entry(rcpu); /* 1-refcnt for kthread */  in __cpu_map_entry_alloc()
486 	kthread_bind(rcpu->kthread, cpu);  in __cpu_map_entry_alloc()
487 	wake_up_process(rcpu->kthread);  in __cpu_map_entry_alloc()
493 	wait_for_completion(&rcpu->kthread_running);  in __cpu_map_entry_alloc()
495 	return rcpu;  in __cpu_map_entry_alloc()
498 	if (rcpu->prog)  in __cpu_map_entry_alloc()
499 		bpf_prog_put(rcpu->prog);  in __cpu_map_entry_alloc()
501 	ptr_ring_cleanup(rcpu->queue, NULL);  in __cpu_map_entry_alloc()
503 	kfree(rcpu->queue);  in __cpu_map_entry_alloc()
505 	free_percpu(rcpu->bulkq);  in __cpu_map_entry_alloc()
507 	kfree(rcpu);  in __cpu_map_entry_alloc()
513 	struct bpf_cpu_map_entry *rcpu;  in __cpu_map_entry_free()  local
520 	rcpu = container_of(rcu, struct bpf_cpu_map_entry, rcu);  in __cpu_map_entry_free()
522 	free_percpu(rcpu->bulkq);  in __cpu_map_entry_free()
524 	put_cpu_map_entry(rcpu);  in __cpu_map_entry_free()
547 				    u32 key_cpu, struct bpf_cpu_map_entry *rcpu)  in __cpu_map_entry_replace()  argument
551 	old_rcpu = unrcu_pointer(xchg(&cmap->cpu_map[key_cpu], RCU_INITIALIZER(rcpu)));  in __cpu_map_entry_replace()
577 	struct bpf_cpu_map_entry *rcpu;  in cpu_map_update_elem()  local
597 		rcpu = NULL; /* Same as deleting */  in cpu_map_update_elem()
600 		rcpu = __cpu_map_entry_alloc(map, &cpumap_value, key_cpu);  in cpu_map_update_elem()
601 		if (!rcpu)  in cpu_map_update_elem()
603 		rcpu->cmap = cmap;  in cpu_map_update_elem()
606 	__cpu_map_entry_replace(cmap, key_cpu, rcpu);  in cpu_map_update_elem()
631 		struct bpf_cpu_map_entry *rcpu;  in cpu_map_free()  local
633 		rcpu = rcu_dereference_raw(cmap->cpu_map[i]);  in cpu_map_free()
634 		if (!rcpu)  in cpu_map_free()
651 	struct bpf_cpu_map_entry *rcpu;  in __cpu_map_lookup_elem()  local
656 	rcpu = rcu_dereference_check(cmap->cpu_map[key],  in __cpu_map_lookup_elem()
658 	return rcpu;  in __cpu_map_lookup_elem()
663 	struct bpf_cpu_map_entry *rcpu =  in cpu_map_lookup_elem()  local
666 	return rcpu ? &rcpu->value : NULL;  in cpu_map_lookup_elem()
708 	struct bpf_cpu_map_entry *rcpu = bq->obj;  in bq_flush_to_queue()  local
710 	const int to_cpu = rcpu->cpu;  in bq_flush_to_queue()
717 	q = rcpu->queue;  in bq_flush_to_queue()
737 	trace_xdp_cpumap_enqueue(rcpu->map_id, processed, drops, to_cpu);  in bq_flush_to_queue()
743 static void bq_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf)  in bq_enqueue()  argument
746 	struct xdp_bulk_queue *bq = this_cpu_ptr(rcpu->bulkq);  in bq_enqueue()
766 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf,  in cpu_map_enqueue()  argument
772 	bq_enqueue(rcpu, xdpf);  in cpu_map_enqueue()
776 int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,  in cpu_map_generic_redirect()  argument
785 	ret = ptr_ring_produce(rcpu->queue, skb);  in cpu_map_generic_redirect()
789 	wake_up_process(rcpu->kthread);  in cpu_map_generic_redirect()
791 	trace_xdp_cpumap_enqueue(rcpu->map_id, !ret, !!ret, rcpu->cpu);  in cpu_map_generic_redirect()