125 static void get_cpu_map_entry(struct bpf_cpu_map_entry *rcpu)  in get_cpu_map_entry()  argument
127 	atomic_inc(&rcpu->refcnt);  in get_cpu_map_entry()
133 	struct bpf_cpu_map_entry *rcpu;  in cpu_map_kthread_stop()  local
135 	rcpu = container_of(work, struct bpf_cpu_map_entry, kthread_stop_wq);  in cpu_map_kthread_stop()
143 	kthread_stop(rcpu->kthread);  in cpu_map_kthread_stop()
160 static void put_cpu_map_entry(struct bpf_cpu_map_entry *rcpu)  in put_cpu_map_entry()  argument
162 	if (atomic_dec_and_test(&rcpu->refcnt)) {  in put_cpu_map_entry()
163 		if (rcpu->prog)  in put_cpu_map_entry()
164 			bpf_prog_put(rcpu->prog);  in put_cpu_map_entry()
166 		__cpu_map_ring_cleanup(rcpu->queue);  in put_cpu_map_entry()
167 		ptr_ring_cleanup(rcpu->queue, NULL);  in put_cpu_map_entry()
168 		kfree(rcpu->queue);  in put_cpu_map_entry()
169 		kfree(rcpu);  in put_cpu_map_entry()
173 static void cpu_map_bpf_prog_run_skb(struct bpf_cpu_map_entry *rcpu,  in cpu_map_bpf_prog_run_skb()  argument
183 		act = bpf_prog_run_generic_xdp(skb, &xdp, rcpu->prog);  in cpu_map_bpf_prog_run_skb()
190 						      rcpu->prog);  in cpu_map_bpf_prog_run_skb()
199 			bpf_warn_invalid_xdp_action(NULL, rcpu->prog, act);  in cpu_map_bpf_prog_run_skb()
202 			trace_xdp_exception(skb->dev, rcpu->prog, act);  in cpu_map_bpf_prog_run_skb()
213 static int cpu_map_bpf_prog_run_xdp(struct bpf_cpu_map_entry *rcpu,  in cpu_map_bpf_prog_run_xdp()  argument
235 		act = bpf_prog_run_xdp(rcpu->prog, &xdp);  in cpu_map_bpf_prog_run_xdp()
249 					      rcpu->prog);  in cpu_map_bpf_prog_run_xdp()
258 			bpf_warn_invalid_xdp_action(NULL, rcpu->prog, act);  in cpu_map_bpf_prog_run_xdp()
274 static int cpu_map_bpf_prog_run(struct bpf_cpu_map_entry *rcpu, void **frames,  in cpu_map_bpf_prog_run()  argument
280 	if (!rcpu->prog)  in cpu_map_bpf_prog_run()
285 	nframes = cpu_map_bpf_prog_run_xdp(rcpu, frames, xdp_n, stats);  in cpu_map_bpf_prog_run()
291 		cpu_map_bpf_prog_run_skb(rcpu, list, stats);  in cpu_map_bpf_prog_run()
301 	struct bpf_cpu_map_entry *rcpu = data;  in cpu_map_kthread_run()  local
310 	while (!kthread_should_stop() || !__ptr_ring_empty(rcpu->queue)) {  in cpu_map_kthread_run()
320 		if (__ptr_ring_empty(rcpu->queue)) {  in cpu_map_kthread_run()
323 			if (__ptr_ring_empty(rcpu->queue)) {  in cpu_map_kthread_run()
338 		n = __ptr_ring_consume_batched(rcpu->queue, frames,  in cpu_map_kthread_run()
363 		nframes = cpu_map_bpf_prog_run(rcpu, frames, xdp_n, &stats, &list);  in cpu_map_kthread_run()
390 		trace_xdp_cpumap_kthread(rcpu->map_id, n, kmem_alloc_drops,  in cpu_map_kthread_run()
397 	put_cpu_map_entry(rcpu);  in cpu_map_kthread_run()
401 static int __cpu_map_load_bpf_program(struct bpf_cpu_map_entry *rcpu,  in __cpu_map_load_bpf_program()  argument
416 	rcpu->value.bpf_prog.id = prog->aux->id;  in __cpu_map_load_bpf_program()
417 	rcpu->prog = prog;  in __cpu_map_load_bpf_program()
428 	struct bpf_cpu_map_entry *rcpu;  in __cpu_map_entry_alloc()  local
434 	rcpu = bpf_map_kmalloc_node(map, sizeof(*rcpu), gfp | __GFP_ZERO, numa);  in __cpu_map_entry_alloc()
435 	if (!rcpu)  in __cpu_map_entry_alloc()
439 	rcpu->bulkq = bpf_map_alloc_percpu(map, sizeof(*rcpu->bulkq),  in __cpu_map_entry_alloc()
441 	if (!rcpu->bulkq)  in __cpu_map_entry_alloc()
445 		bq = per_cpu_ptr(rcpu->bulkq, i);  in __cpu_map_entry_alloc()
446 		bq->obj = rcpu;  in __cpu_map_entry_alloc()
450 	rcpu->queue = bpf_map_kmalloc_node(map, sizeof(*rcpu->queue), gfp,  in __cpu_map_entry_alloc()
452 	if (!rcpu->queue)  in __cpu_map_entry_alloc()
455 	err = ptr_ring_init(rcpu->queue, value->qsize, gfp);  in __cpu_map_entry_alloc()
459 	rcpu->cpu    = cpu;  in __cpu_map_entry_alloc()
460 	rcpu->map_id = map->id;  in __cpu_map_entry_alloc()
461 	rcpu->value.qsize  = value->qsize;  in __cpu_map_entry_alloc()
463 	if (fd > 0 && __cpu_map_load_bpf_program(rcpu, map, fd))  in __cpu_map_entry_alloc()
467 	rcpu->kthread = kthread_create_on_node(cpu_map_kthread_run, rcpu, numa,  in __cpu_map_entry_alloc()
470 	if (IS_ERR(rcpu->kthread))  in __cpu_map_entry_alloc()
473 	get_cpu_map_entry(rcpu); /* 1-refcnt for being in cmap->cpu_map[] */  in __cpu_map_entry_alloc()
474 	get_cpu_map_entry(rcpu); /* 1-refcnt for kthread */  in __cpu_map_entry_alloc()
477 	kthread_bind(rcpu->kthread, cpu);  in __cpu_map_entry_alloc()
478 	wake_up_process(rcpu->kthread);  in __cpu_map_entry_alloc()
480 	return rcpu;  in __cpu_map_entry_alloc()
483 	if (rcpu->prog)  in __cpu_map_entry_alloc()
484 		bpf_prog_put(rcpu->prog);  in __cpu_map_entry_alloc()
486 	ptr_ring_cleanup(rcpu->queue, NULL);  in __cpu_map_entry_alloc()
488 	kfree(rcpu->queue);  in __cpu_map_entry_alloc()
490 	free_percpu(rcpu->bulkq);  in __cpu_map_entry_alloc()
492 	kfree(rcpu);  in __cpu_map_entry_alloc()
498 	struct bpf_cpu_map_entry *rcpu;  in __cpu_map_entry_free()  local
505 	rcpu = container_of(rcu, struct bpf_cpu_map_entry, rcu);  in __cpu_map_entry_free()
507 	free_percpu(rcpu->bulkq);  in __cpu_map_entry_free()
509 	put_cpu_map_entry(rcpu);  in __cpu_map_entry_free()
532 				    u32 key_cpu, struct bpf_cpu_map_entry *rcpu)  in __cpu_map_entry_replace()  argument
536 	old_rcpu = unrcu_pointer(xchg(&cmap->cpu_map[key_cpu], RCU_INITIALIZER(rcpu)));  in __cpu_map_entry_replace()
562 	struct bpf_cpu_map_entry *rcpu;  in cpu_map_update_elem()  local
582 		rcpu = NULL; /* Same as deleting */  in cpu_map_update_elem()
585 		rcpu = __cpu_map_entry_alloc(map, &cpumap_value, key_cpu);  in cpu_map_update_elem()
586 		if (!rcpu)  in cpu_map_update_elem()
588 		rcpu->cmap = cmap;  in cpu_map_update_elem()
591 	__cpu_map_entry_replace(cmap, key_cpu, rcpu);  in cpu_map_update_elem()
616 		struct bpf_cpu_map_entry *rcpu;  in cpu_map_free()  local
618 		rcpu = rcu_dereference_raw(cmap->cpu_map[i]);  in cpu_map_free()
619 		if (!rcpu)  in cpu_map_free()
636 	struct bpf_cpu_map_entry *rcpu;  in __cpu_map_lookup_elem()  local
641 	rcpu = rcu_dereference_check(cmap->cpu_map[key],  in __cpu_map_lookup_elem()
643 	return rcpu;  in __cpu_map_lookup_elem()
648 	struct bpf_cpu_map_entry *rcpu =  in cpu_map_lookup_elem()  local
651 	return rcpu ? &rcpu->value : NULL;  in cpu_map_lookup_elem()
693 	struct bpf_cpu_map_entry *rcpu = bq->obj;  in bq_flush_to_queue()  local
695 	const int to_cpu = rcpu->cpu;  in bq_flush_to_queue()
702 	q = rcpu->queue;  in bq_flush_to_queue()
722 	trace_xdp_cpumap_enqueue(rcpu->map_id, processed, drops, to_cpu);  in bq_flush_to_queue()
728 static void bq_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf)  in bq_enqueue()  argument
731 	struct xdp_bulk_queue *bq = this_cpu_ptr(rcpu->bulkq);  in bq_enqueue()
751 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf,  in cpu_map_enqueue()  argument
757 	bq_enqueue(rcpu, xdpf);  in cpu_map_enqueue()
761 int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,  in cpu_map_generic_redirect()  argument
770 	ret = ptr_ring_produce(rcpu->queue, skb);  in cpu_map_generic_redirect()
774 	wake_up_process(rcpu->kthread);  in cpu_map_generic_redirect()
776 	trace_xdp_cpumap_enqueue(rcpu->map_id, !ret, !!ret, rcpu->cpu);  in cpu_map_generic_redirect()