1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2017 Facebook
6 #include <linux/btf_ids.h>
7 #include <linux/slab.h>
8 #include <linux/init.h>
9 #include <linux/vmalloc.h>
10 #include <linux/etherdevice.h>
11 #include <linux/filter.h>
12 #include <linux/rcupdate_trace.h>
13 #include <linux/sched/signal.h>
14 #include <net/bpf_sk_storage.h>
17 #include <net/net_namespace.h>
18 #include <net/page_pool.h>
19 #include <linux/error-injection.h>
20 #include <linux/smp.h>
21 #include <linux/sock_diag.h>
24 #define CREATE_TRACE_POINTS
25 #include <trace/events/bpf_test_run.h>
27 struct bpf_test_timer {
28 enum { NO_PREEMPT, NO_MIGRATE } mode;
30 u64 time_start, time_spent;
33 static void bpf_test_timer_enter(struct bpf_test_timer *t)
37 if (t->mode == NO_PREEMPT)
42 t->time_start = ktime_get_ns();
45 static void bpf_test_timer_leave(struct bpf_test_timer *t)
50 if (t->mode == NO_PREEMPT)
57 static bool bpf_test_timer_continue(struct bpf_test_timer *t, int iterations,
58 u32 repeat, int *err, u32 *duration)
64 t->time_spent += ktime_get_ns() - t->time_start;
65 do_div(t->time_spent, t->i);
66 *duration = t->time_spent > U32_MAX ? U32_MAX : (u32)t->time_spent;
71 if (signal_pending(current)) {
72 /* During iteration: we've been cancelled, abort. */
78 /* During iteration: we need to reschedule between runs. */
79 t->time_spent += ktime_get_ns() - t->time_start;
80 bpf_test_timer_leave(t);
82 bpf_test_timer_enter(t);
85 /* Do another round. */
93 /* We put this struct at the head of each page with a context and frame
94 * initialised when the page is allocated, so we don't have to do this on each
95 * repetition of the test run.
97 struct xdp_page_head {
98 struct xdp_buff orig_ctx;
100 struct xdp_frame frm;
104 struct xdp_test_data {
105 struct xdp_buff *orig_ctx;
106 struct xdp_rxq_info rxq;
107 struct net_device *dev;
108 struct page_pool *pp;
109 struct xdp_frame **frames;
110 struct sk_buff **skbs;
111 struct xdp_mem_info mem;
116 #define TEST_XDP_FRAME_SIZE (PAGE_SIZE - sizeof(struct xdp_page_head))
117 #define TEST_XDP_MAX_BATCH 256
119 static void xdp_test_run_init_page(struct page *page, void *arg)
121 struct xdp_page_head *head = phys_to_virt(page_to_phys(page));
122 struct xdp_buff *new_ctx, *orig_ctx;
123 u32 headroom = XDP_PACKET_HEADROOM;
124 struct xdp_test_data *xdp = arg;
125 size_t frm_len, meta_len;
126 struct xdp_frame *frm;
129 orig_ctx = xdp->orig_ctx;
130 frm_len = orig_ctx->data_end - orig_ctx->data_meta;
131 meta_len = orig_ctx->data - orig_ctx->data_meta;
132 headroom -= meta_len;
134 new_ctx = &head->ctx;
137 memcpy(data + headroom, orig_ctx->data_meta, frm_len);
139 xdp_init_buff(new_ctx, TEST_XDP_FRAME_SIZE, &xdp->rxq);
140 xdp_prepare_buff(new_ctx, data, headroom, frm_len, true);
141 new_ctx->data = new_ctx->data_meta + meta_len;
143 xdp_update_frame_from_buff(new_ctx, frm);
144 frm->mem = new_ctx->rxq->mem;
146 memcpy(&head->orig_ctx, new_ctx, sizeof(head->orig_ctx));
149 static int xdp_test_run_setup(struct xdp_test_data *xdp, struct xdp_buff *orig_ctx)
151 struct page_pool *pp;
153 struct page_pool_params pp_params = {
156 .pool_size = xdp->batch_size,
158 .init_callback = xdp_test_run_init_page,
162 xdp->frames = kvmalloc_array(xdp->batch_size, sizeof(void *), GFP_KERNEL);
166 xdp->skbs = kvmalloc_array(xdp->batch_size, sizeof(void *), GFP_KERNEL);
170 pp = page_pool_create(&pp_params);
176 /* will copy 'mem.id' into pp->xdp_mem_id */
177 err = xdp_reg_mem_model(&xdp->mem, MEM_TYPE_PAGE_POOL, pp);
183 /* We create a 'fake' RXQ referencing the original dev, but with an
184 * xdp_mem_info pointing to our page_pool
186 xdp_rxq_info_reg(&xdp->rxq, orig_ctx->rxq->dev, 0, 0);
187 xdp->rxq.mem.type = MEM_TYPE_PAGE_POOL;
188 xdp->rxq.mem.id = pp->xdp_mem_id;
189 xdp->dev = orig_ctx->rxq->dev;
190 xdp->orig_ctx = orig_ctx;
195 page_pool_destroy(pp);
203 static void xdp_test_run_teardown(struct xdp_test_data *xdp)
205 xdp_unreg_mem_model(&xdp->mem);
206 page_pool_destroy(xdp->pp);
211 static bool ctx_was_changed(struct xdp_page_head *head)
213 return head->orig_ctx.data != head->ctx.data ||
214 head->orig_ctx.data_meta != head->ctx.data_meta ||
215 head->orig_ctx.data_end != head->ctx.data_end;
218 static void reset_ctx(struct xdp_page_head *head)
220 if (likely(!ctx_was_changed(head)))
223 head->ctx.data = head->orig_ctx.data;
224 head->ctx.data_meta = head->orig_ctx.data_meta;
225 head->ctx.data_end = head->orig_ctx.data_end;
226 xdp_update_frame_from_buff(&head->ctx, &head->frm);
229 static int xdp_recv_frames(struct xdp_frame **frames, int nframes,
230 struct sk_buff **skbs,
231 struct net_device *dev)
233 gfp_t gfp = __GFP_ZERO | GFP_ATOMIC;
237 n = kmem_cache_alloc_bulk(skbuff_head_cache, gfp, nframes, (void **)skbs);
238 if (unlikely(n == 0)) {
239 for (i = 0; i < nframes; i++)
240 xdp_return_frame(frames[i]);
244 for (i = 0; i < nframes; i++) {
245 struct xdp_frame *xdpf = frames[i];
246 struct sk_buff *skb = skbs[i];
248 skb = __xdp_build_skb_from_frame(xdpf, skb, dev);
250 xdp_return_frame(xdpf);
254 list_add_tail(&skb->list, &list);
256 netif_receive_skb_list(&list);
261 static int xdp_test_run_batch(struct xdp_test_data *xdp, struct bpf_prog *prog,
264 struct bpf_redirect_info *ri = this_cpu_ptr(&bpf_redirect_info);
265 int err = 0, act, ret, i, nframes = 0, batch_sz;
266 struct xdp_frame **frames = xdp->frames;
267 struct xdp_page_head *head;
268 struct xdp_frame *frm;
269 bool redirect = false;
270 struct xdp_buff *ctx;
273 batch_sz = min_t(u32, repeat, xdp->batch_size);
276 xdp_set_return_frame_no_direct();
278 for (i = 0; i < batch_sz; i++) {
279 page = page_pool_dev_alloc_pages(xdp->pp);
285 head = phys_to_virt(page_to_phys(page));
291 act = bpf_prog_run_xdp(prog, ctx);
293 /* if program changed pkt bounds we need to update the xdp_frame */
294 if (unlikely(ctx_was_changed(head))) {
295 ret = xdp_update_frame_from_buff(ctx, frm);
297 xdp_return_buff(ctx);
304 /* we can't do a real XDP_TX since we're not in the
305 * driver, so turn it into a REDIRECT back to the same
308 ri->tgt_index = xdp->dev->ifindex;
309 ri->map_id = INT_MAX;
310 ri->map_type = BPF_MAP_TYPE_UNSPEC;
314 ret = xdp_do_redirect_frame(xdp->dev, ctx, frm, prog);
316 xdp_return_buff(ctx);
319 frames[nframes++] = frm;
322 bpf_warn_invalid_xdp_action(NULL, prog, act);
325 xdp_return_buff(ctx);
334 ret = xdp_recv_frames(frames, nframes, xdp->skbs, xdp->dev);
339 xdp_clear_return_frame_no_direct();
344 static int bpf_test_run_xdp_live(struct bpf_prog *prog, struct xdp_buff *ctx,
345 u32 repeat, u32 batch_size, u32 *time)
348 struct xdp_test_data xdp = { .batch_size = batch_size };
349 struct bpf_test_timer t = { .mode = NO_MIGRATE };
355 ret = xdp_test_run_setup(&xdp, ctx);
359 bpf_test_timer_enter(&t);
362 ret = xdp_test_run_batch(&xdp, prog, repeat - t.i);
363 if (unlikely(ret < 0))
365 } while (bpf_test_timer_continue(&t, xdp.frame_cnt, repeat, &ret, time));
366 bpf_test_timer_leave(&t);
368 xdp_test_run_teardown(&xdp);
372 static int bpf_test_run(struct bpf_prog *prog, void *ctx, u32 repeat,
373 u32 *retval, u32 *time, bool xdp)
375 struct bpf_prog_array_item item = {.prog = prog};
376 struct bpf_run_ctx *old_ctx;
377 struct bpf_cg_run_ctx run_ctx;
378 struct bpf_test_timer t = { NO_MIGRATE };
379 enum bpf_cgroup_storage_type stype;
382 for_each_cgroup_storage_type(stype) {
383 item.cgroup_storage[stype] = bpf_cgroup_storage_alloc(prog, stype);
384 if (IS_ERR(item.cgroup_storage[stype])) {
385 item.cgroup_storage[stype] = NULL;
386 for_each_cgroup_storage_type(stype)
387 bpf_cgroup_storage_free(item.cgroup_storage[stype]);
395 bpf_test_timer_enter(&t);
396 old_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
398 run_ctx.prog_item = &item;
400 *retval = bpf_prog_run_xdp(prog, ctx);
402 *retval = bpf_prog_run(prog, ctx);
403 } while (bpf_test_timer_continue(&t, 1, repeat, &ret, time));
404 bpf_reset_run_ctx(old_ctx);
405 bpf_test_timer_leave(&t);
407 for_each_cgroup_storage_type(stype)
408 bpf_cgroup_storage_free(item.cgroup_storage[stype]);
413 static int bpf_test_finish(const union bpf_attr *kattr,
414 union bpf_attr __user *uattr, const void *data,
415 struct skb_shared_info *sinfo, u32 size,
416 u32 retval, u32 duration)
418 void __user *data_out = u64_to_user_ptr(kattr->test.data_out);
420 u32 copy_size = size;
422 /* Clamp copy if the user has provided a size hint, but copy the full
423 * buffer if not to retain old behaviour.
425 if (kattr->test.data_size_out &&
426 copy_size > kattr->test.data_size_out) {
427 copy_size = kattr->test.data_size_out;
432 int len = sinfo ? copy_size - sinfo->xdp_frags_size : copy_size;
439 if (copy_to_user(data_out, data, len))
446 for (i = 0; i < sinfo->nr_frags; i++) {
447 skb_frag_t *frag = &sinfo->frags[i];
449 if (offset >= copy_size) {
454 data_len = min_t(u32, copy_size - offset,
455 skb_frag_size(frag));
457 if (copy_to_user(data_out + offset,
458 skb_frag_address(frag),
467 if (copy_to_user(&uattr->test.data_size_out, &size, sizeof(size)))
469 if (copy_to_user(&uattr->test.retval, &retval, sizeof(retval)))
471 if (copy_to_user(&uattr->test.duration, &duration, sizeof(duration)))
476 trace_bpf_test_finish(&err);
480 /* Integer types of various sizes and pointer combinations cover variety of
481 * architecture dependent calling conventions. 7+ can be supported in the
485 __diag_ignore_all("-Wmissing-prototypes",
486 "Global functions as their definitions will be in vmlinux BTF");
487 int noinline bpf_fentry_test1(int a)
491 EXPORT_SYMBOL_GPL(bpf_fentry_test1);
492 ALLOW_ERROR_INJECTION(bpf_fentry_test1, ERRNO);
494 int noinline bpf_fentry_test2(int a, u64 b)
499 int noinline bpf_fentry_test3(char a, int b, u64 c)
504 int noinline bpf_fentry_test4(void *a, char b, int c, u64 d)
506 return (long)a + b + c + d;
509 int noinline bpf_fentry_test5(u64 a, void *b, short c, int d, u64 e)
511 return a + (long)b + c + d + e;
514 int noinline bpf_fentry_test6(u64 a, void *b, short c, int d, void *e, u64 f)
516 return a + (long)b + c + d + (long)e + f;
519 struct bpf_fentry_test_t {
520 struct bpf_fentry_test_t *a;
523 int noinline bpf_fentry_test7(struct bpf_fentry_test_t *arg)
528 int noinline bpf_fentry_test8(struct bpf_fentry_test_t *arg)
533 int noinline bpf_modify_return_test(int a, int *b)
539 u64 noinline bpf_kfunc_call_test1(struct sock *sk, u32 a, u64 b, u32 c, u64 d)
541 return a + b + c + d;
544 int noinline bpf_kfunc_call_test2(struct sock *sk, u32 a, u32 b)
549 struct sock * noinline bpf_kfunc_call_test3(struct sock *sk)
554 struct prog_test_member1 {
558 struct prog_test_member {
559 struct prog_test_member1 m;
563 struct prog_test_ref_kfunc {
566 struct prog_test_member memb;
567 struct prog_test_ref_kfunc *next;
571 static struct prog_test_ref_kfunc prog_test_struct = {
574 .next = &prog_test_struct,
575 .cnt = REFCOUNT_INIT(1),
578 noinline struct prog_test_ref_kfunc *
579 bpf_kfunc_call_test_acquire(unsigned long *scalar_ptr)
581 refcount_inc(&prog_test_struct.cnt);
582 return &prog_test_struct;
585 noinline struct prog_test_member *
586 bpf_kfunc_call_memb_acquire(void)
592 noinline void bpf_kfunc_call_test_release(struct prog_test_ref_kfunc *p)
597 refcount_dec(&p->cnt);
600 noinline void bpf_kfunc_call_memb_release(struct prog_test_member *p)
604 noinline void bpf_kfunc_call_memb1_release(struct prog_test_member1 *p)
609 static int *__bpf_kfunc_call_test_get_mem(struct prog_test_ref_kfunc *p, const int size)
611 if (size > 2 * sizeof(int))
617 noinline int *bpf_kfunc_call_test_get_rdwr_mem(struct prog_test_ref_kfunc *p, const int rdwr_buf_size)
619 return __bpf_kfunc_call_test_get_mem(p, rdwr_buf_size);
622 noinline int *bpf_kfunc_call_test_get_rdonly_mem(struct prog_test_ref_kfunc *p, const int rdonly_buf_size)
624 return __bpf_kfunc_call_test_get_mem(p, rdonly_buf_size);
627 /* the next 2 ones can't be really used for testing expect to ensure
628 * that the verifier rejects the call.
629 * Acquire functions must return struct pointers, so these ones are
632 noinline int *bpf_kfunc_call_test_acq_rdonly_mem(struct prog_test_ref_kfunc *p, const int rdonly_buf_size)
634 return __bpf_kfunc_call_test_get_mem(p, rdonly_buf_size);
637 noinline void bpf_kfunc_call_int_mem_release(int *p)
641 noinline struct prog_test_ref_kfunc *
642 bpf_kfunc_call_test_kptr_get(struct prog_test_ref_kfunc **pp, int a, int b)
644 struct prog_test_ref_kfunc *p = READ_ONCE(*pp);
648 refcount_inc(&p->cnt);
652 struct prog_test_pass1 {
665 struct prog_test_pass2 {
670 unsigned long arr3[8];
674 struct prog_test_fail1 {
679 struct prog_test_fail2 {
681 struct prog_test_pass1 x;
684 struct prog_test_fail3 {
690 noinline void bpf_kfunc_call_test_pass_ctx(struct __sk_buff *skb)
694 noinline void bpf_kfunc_call_test_pass1(struct prog_test_pass1 *p)
698 noinline void bpf_kfunc_call_test_pass2(struct prog_test_pass2 *p)
702 noinline void bpf_kfunc_call_test_fail1(struct prog_test_fail1 *p)
706 noinline void bpf_kfunc_call_test_fail2(struct prog_test_fail2 *p)
710 noinline void bpf_kfunc_call_test_fail3(struct prog_test_fail3 *p)
714 noinline void bpf_kfunc_call_test_mem_len_pass1(void *mem, int mem__sz)
718 noinline void bpf_kfunc_call_test_mem_len_fail1(void *mem, int len)
722 noinline void bpf_kfunc_call_test_mem_len_fail2(u64 *mem, int len)
726 noinline void bpf_kfunc_call_test_ref(struct prog_test_ref_kfunc *p)
730 noinline void bpf_kfunc_call_test_destructive(void)
736 ALLOW_ERROR_INJECTION(bpf_modify_return_test, ERRNO);
738 BTF_SET8_START(test_sk_check_kfunc_ids)
739 BTF_ID_FLAGS(func, bpf_kfunc_call_test1)
740 BTF_ID_FLAGS(func, bpf_kfunc_call_test2)
741 BTF_ID_FLAGS(func, bpf_kfunc_call_test3)
742 BTF_ID_FLAGS(func, bpf_kfunc_call_test_acquire, KF_ACQUIRE | KF_RET_NULL)
743 BTF_ID_FLAGS(func, bpf_kfunc_call_memb_acquire, KF_ACQUIRE | KF_RET_NULL)
744 BTF_ID_FLAGS(func, bpf_kfunc_call_test_release, KF_RELEASE)
745 BTF_ID_FLAGS(func, bpf_kfunc_call_memb_release, KF_RELEASE)
746 BTF_ID_FLAGS(func, bpf_kfunc_call_memb1_release, KF_RELEASE)
747 BTF_ID_FLAGS(func, bpf_kfunc_call_test_get_rdwr_mem, KF_RET_NULL)
748 BTF_ID_FLAGS(func, bpf_kfunc_call_test_get_rdonly_mem, KF_RET_NULL)
749 BTF_ID_FLAGS(func, bpf_kfunc_call_test_acq_rdonly_mem, KF_ACQUIRE | KF_RET_NULL)
750 BTF_ID_FLAGS(func, bpf_kfunc_call_int_mem_release, KF_RELEASE)
751 BTF_ID_FLAGS(func, bpf_kfunc_call_test_kptr_get, KF_ACQUIRE | KF_RET_NULL | KF_KPTR_GET)
752 BTF_ID_FLAGS(func, bpf_kfunc_call_test_pass_ctx)
753 BTF_ID_FLAGS(func, bpf_kfunc_call_test_pass1)
754 BTF_ID_FLAGS(func, bpf_kfunc_call_test_pass2)
755 BTF_ID_FLAGS(func, bpf_kfunc_call_test_fail1)
756 BTF_ID_FLAGS(func, bpf_kfunc_call_test_fail2)
757 BTF_ID_FLAGS(func, bpf_kfunc_call_test_fail3)
758 BTF_ID_FLAGS(func, bpf_kfunc_call_test_mem_len_pass1)
759 BTF_ID_FLAGS(func, bpf_kfunc_call_test_mem_len_fail1)
760 BTF_ID_FLAGS(func, bpf_kfunc_call_test_mem_len_fail2)
761 BTF_ID_FLAGS(func, bpf_kfunc_call_test_ref, KF_TRUSTED_ARGS)
762 BTF_ID_FLAGS(func, bpf_kfunc_call_test_destructive, KF_DESTRUCTIVE)
763 BTF_SET8_END(test_sk_check_kfunc_ids)
765 static void *bpf_test_init(const union bpf_attr *kattr, u32 user_size,
766 u32 size, u32 headroom, u32 tailroom)
768 void __user *data_in = u64_to_user_ptr(kattr->test.data_in);
771 if (size < ETH_HLEN || size > PAGE_SIZE - headroom - tailroom)
772 return ERR_PTR(-EINVAL);
774 if (user_size > size)
775 return ERR_PTR(-EMSGSIZE);
777 size = SKB_DATA_ALIGN(size);
778 data = kzalloc(size + headroom + tailroom, GFP_USER);
780 return ERR_PTR(-ENOMEM);
782 if (copy_from_user(data + headroom, data_in, user_size)) {
784 return ERR_PTR(-EFAULT);
790 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
791 const union bpf_attr *kattr,
792 union bpf_attr __user *uattr)
794 struct bpf_fentry_test_t arg = {};
795 u16 side_effect = 0, ret = 0;
796 int b = 2, err = -EFAULT;
799 if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size)
802 switch (prog->expected_attach_type) {
803 case BPF_TRACE_FENTRY:
804 case BPF_TRACE_FEXIT:
805 if (bpf_fentry_test1(1) != 2 ||
806 bpf_fentry_test2(2, 3) != 5 ||
807 bpf_fentry_test3(4, 5, 6) != 15 ||
808 bpf_fentry_test4((void *)7, 8, 9, 10) != 34 ||
809 bpf_fentry_test5(11, (void *)12, 13, 14, 15) != 65 ||
810 bpf_fentry_test6(16, (void *)17, 18, 19, (void *)20, 21) != 111 ||
811 bpf_fentry_test7((struct bpf_fentry_test_t *)0) != 0 ||
812 bpf_fentry_test8(&arg) != 0)
815 case BPF_MODIFY_RETURN:
816 ret = bpf_modify_return_test(1, &b);
824 retval = ((u32)side_effect << 16) | ret;
825 if (copy_to_user(&uattr->test.retval, &retval, sizeof(retval)))
830 trace_bpf_test_finish(&err);
834 struct bpf_raw_tp_test_run_info {
835 struct bpf_prog *prog;
841 __bpf_prog_test_run_raw_tp(void *data)
843 struct bpf_raw_tp_test_run_info *info = data;
846 info->retval = bpf_prog_run(info->prog, info->ctx);
850 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
851 const union bpf_attr *kattr,
852 union bpf_attr __user *uattr)
854 void __user *ctx_in = u64_to_user_ptr(kattr->test.ctx_in);
855 __u32 ctx_size_in = kattr->test.ctx_size_in;
856 struct bpf_raw_tp_test_run_info info;
857 int cpu = kattr->test.cpu, err = 0;
860 /* doesn't support data_in/out, ctx_out, duration, or repeat */
861 if (kattr->test.data_in || kattr->test.data_out ||
862 kattr->test.ctx_out || kattr->test.duration ||
863 kattr->test.repeat || kattr->test.batch_size)
866 if (ctx_size_in < prog->aux->max_ctx_offset ||
867 ctx_size_in > MAX_BPF_FUNC_ARGS * sizeof(u64))
870 if ((kattr->test.flags & BPF_F_TEST_RUN_ON_CPU) == 0 && cpu != 0)
874 info.ctx = memdup_user(ctx_in, ctx_size_in);
875 if (IS_ERR(info.ctx))
876 return PTR_ERR(info.ctx);
883 current_cpu = get_cpu();
884 if ((kattr->test.flags & BPF_F_TEST_RUN_ON_CPU) == 0 ||
885 cpu == current_cpu) {
886 __bpf_prog_test_run_raw_tp(&info);
887 } else if (cpu >= nr_cpu_ids || !cpu_online(cpu)) {
888 /* smp_call_function_single() also checks cpu_online()
889 * after csd_lock(). However, since cpu is from user
890 * space, let's do an extra quick check to filter out
891 * invalid value before smp_call_function_single().
895 err = smp_call_function_single(cpu, __bpf_prog_test_run_raw_tp,
901 copy_to_user(&uattr->test.retval, &info.retval, sizeof(u32)))
908 static void *bpf_ctx_init(const union bpf_attr *kattr, u32 max_size)
910 void __user *data_in = u64_to_user_ptr(kattr->test.ctx_in);
911 void __user *data_out = u64_to_user_ptr(kattr->test.ctx_out);
912 u32 size = kattr->test.ctx_size_in;
916 if (!data_in && !data_out)
919 data = kzalloc(max_size, GFP_USER);
921 return ERR_PTR(-ENOMEM);
924 err = bpf_check_uarg_tail_zero(USER_BPFPTR(data_in), max_size, size);
930 size = min_t(u32, max_size, size);
931 if (copy_from_user(data, data_in, size)) {
933 return ERR_PTR(-EFAULT);
939 static int bpf_ctx_finish(const union bpf_attr *kattr,
940 union bpf_attr __user *uattr, const void *data,
943 void __user *data_out = u64_to_user_ptr(kattr->test.ctx_out);
945 u32 copy_size = size;
947 if (!data || !data_out)
950 if (copy_size > kattr->test.ctx_size_out) {
951 copy_size = kattr->test.ctx_size_out;
955 if (copy_to_user(data_out, data, copy_size))
957 if (copy_to_user(&uattr->test.ctx_size_out, &size, sizeof(size)))
966 * range_is_zero - test whether buffer is initialized
967 * @buf: buffer to check
968 * @from: check from this position
969 * @to: check up until (excluding) this position
971 * This function returns true if the there is a non-zero byte
972 * in the buf in the range [from,to).
974 static inline bool range_is_zero(void *buf, size_t from, size_t to)
976 return !memchr_inv((u8 *)buf + from, 0, to - from);
979 static int convert___skb_to_skb(struct sk_buff *skb, struct __sk_buff *__skb)
981 struct qdisc_skb_cb *cb = (struct qdisc_skb_cb *)skb->cb;
989 /* make sure the fields we don't use are zeroed */
990 if (!range_is_zero(__skb, 0, offsetof(struct __sk_buff, mark)))
993 /* mark is allowed */
995 if (!range_is_zero(__skb, offsetofend(struct __sk_buff, mark),
996 offsetof(struct __sk_buff, priority)))
999 /* priority is allowed */
1000 /* ingress_ifindex is allowed */
1001 /* ifindex is allowed */
1003 if (!range_is_zero(__skb, offsetofend(struct __sk_buff, ifindex),
1004 offsetof(struct __sk_buff, cb)))
1009 if (!range_is_zero(__skb, offsetofend(struct __sk_buff, cb),
1010 offsetof(struct __sk_buff, tstamp)))
1013 /* tstamp is allowed */
1014 /* wire_len is allowed */
1015 /* gso_segs is allowed */
1017 if (!range_is_zero(__skb, offsetofend(struct __sk_buff, gso_segs),
1018 offsetof(struct __sk_buff, gso_size)))
1021 /* gso_size is allowed */
1023 if (!range_is_zero(__skb, offsetofend(struct __sk_buff, gso_size),
1024 offsetof(struct __sk_buff, hwtstamp)))
1027 /* hwtstamp is allowed */
1029 if (!range_is_zero(__skb, offsetofend(struct __sk_buff, hwtstamp),
1030 sizeof(struct __sk_buff)))
1033 skb->mark = __skb->mark;
1034 skb->priority = __skb->priority;
1035 skb->skb_iif = __skb->ingress_ifindex;
1036 skb->tstamp = __skb->tstamp;
1037 memcpy(&cb->data, __skb->cb, QDISC_CB_PRIV_LEN);
1039 if (__skb->wire_len == 0) {
1040 cb->pkt_len = skb->len;
1042 if (__skb->wire_len < skb->len ||
1043 __skb->wire_len > GSO_LEGACY_MAX_SIZE)
1045 cb->pkt_len = __skb->wire_len;
1048 if (__skb->gso_segs > GSO_MAX_SEGS)
1050 skb_shinfo(skb)->gso_segs = __skb->gso_segs;
1051 skb_shinfo(skb)->gso_size = __skb->gso_size;
1052 skb_shinfo(skb)->hwtstamps.hwtstamp = __skb->hwtstamp;
1057 static void convert_skb_to___skb(struct sk_buff *skb, struct __sk_buff *__skb)
1059 struct qdisc_skb_cb *cb = (struct qdisc_skb_cb *)skb->cb;
1064 __skb->mark = skb->mark;
1065 __skb->priority = skb->priority;
1066 __skb->ingress_ifindex = skb->skb_iif;
1067 __skb->ifindex = skb->dev->ifindex;
1068 __skb->tstamp = skb->tstamp;
1069 memcpy(__skb->cb, &cb->data, QDISC_CB_PRIV_LEN);
1070 __skb->wire_len = cb->pkt_len;
1071 __skb->gso_segs = skb_shinfo(skb)->gso_segs;
1072 __skb->hwtstamp = skb_shinfo(skb)->hwtstamps.hwtstamp;
1075 static struct proto bpf_dummy_proto = {
1076 .name = "bpf_dummy",
1077 .owner = THIS_MODULE,
1078 .obj_size = sizeof(struct sock),
1081 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1082 union bpf_attr __user *uattr)
1084 bool is_l2 = false, is_direct_pkt_access = false;
1085 struct net *net = current->nsproxy->net_ns;
1086 struct net_device *dev = net->loopback_dev;
1087 u32 size = kattr->test.data_size_in;
1088 u32 repeat = kattr->test.repeat;
1089 struct __sk_buff *ctx = NULL;
1090 u32 retval, duration;
1091 int hh_len = ETH_HLEN;
1092 struct sk_buff *skb;
1097 if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size)
1100 data = bpf_test_init(kattr, kattr->test.data_size_in,
1101 size, NET_SKB_PAD + NET_IP_ALIGN,
1102 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
1104 return PTR_ERR(data);
1106 ctx = bpf_ctx_init(kattr, sizeof(struct __sk_buff));
1109 return PTR_ERR(ctx);
1112 switch (prog->type) {
1113 case BPF_PROG_TYPE_SCHED_CLS:
1114 case BPF_PROG_TYPE_SCHED_ACT:
1117 case BPF_PROG_TYPE_LWT_IN:
1118 case BPF_PROG_TYPE_LWT_OUT:
1119 case BPF_PROG_TYPE_LWT_XMIT:
1120 is_direct_pkt_access = true;
1126 sk = sk_alloc(net, AF_UNSPEC, GFP_USER, &bpf_dummy_proto, 1);
1132 sock_init_data(NULL, sk);
1134 skb = build_skb(data, 0);
1143 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
1144 __skb_put(skb, size);
1145 if (ctx && ctx->ifindex > 1) {
1146 dev = dev_get_by_index(net, ctx->ifindex);
1152 skb->protocol = eth_type_trans(skb, dev);
1153 skb_reset_network_header(skb);
1155 switch (skb->protocol) {
1156 case htons(ETH_P_IP):
1157 sk->sk_family = AF_INET;
1158 if (sizeof(struct iphdr) <= skb_headlen(skb)) {
1159 sk->sk_rcv_saddr = ip_hdr(skb)->saddr;
1160 sk->sk_daddr = ip_hdr(skb)->daddr;
1163 #if IS_ENABLED(CONFIG_IPV6)
1164 case htons(ETH_P_IPV6):
1165 sk->sk_family = AF_INET6;
1166 if (sizeof(struct ipv6hdr) <= skb_headlen(skb)) {
1167 sk->sk_v6_rcv_saddr = ipv6_hdr(skb)->saddr;
1168 sk->sk_v6_daddr = ipv6_hdr(skb)->daddr;
1177 __skb_push(skb, hh_len);
1178 if (is_direct_pkt_access)
1179 bpf_compute_data_pointers(skb);
1180 ret = convert___skb_to_skb(skb, ctx);
1183 ret = bpf_test_run(prog, skb, repeat, &retval, &duration, false);
1187 if (skb_headroom(skb) < hh_len) {
1188 int nhead = HH_DATA_ALIGN(hh_len - skb_headroom(skb));
1190 if (pskb_expand_head(skb, nhead, 0, GFP_USER)) {
1195 memset(__skb_push(skb, hh_len), 0, hh_len);
1197 convert_skb_to___skb(skb, ctx);
1200 /* bpf program can never convert linear skb to non-linear */
1201 if (WARN_ON_ONCE(skb_is_nonlinear(skb)))
1202 size = skb_headlen(skb);
1203 ret = bpf_test_finish(kattr, uattr, skb->data, NULL, size, retval,
1206 ret = bpf_ctx_finish(kattr, uattr, ctx,
1207 sizeof(struct __sk_buff));
1209 if (dev && dev != net->loopback_dev)
1217 static int xdp_convert_md_to_buff(struct xdp_md *xdp_md, struct xdp_buff *xdp)
1219 unsigned int ingress_ifindex, rx_queue_index;
1220 struct netdev_rx_queue *rxqueue;
1221 struct net_device *device;
1226 if (xdp_md->egress_ifindex != 0)
1229 ingress_ifindex = xdp_md->ingress_ifindex;
1230 rx_queue_index = xdp_md->rx_queue_index;
1232 if (!ingress_ifindex && rx_queue_index)
1235 if (ingress_ifindex) {
1236 device = dev_get_by_index(current->nsproxy->net_ns,
1241 if (rx_queue_index >= device->real_num_rx_queues)
1244 rxqueue = __netif_get_rx_queue(device, rx_queue_index);
1246 if (!xdp_rxq_info_is_reg(&rxqueue->xdp_rxq))
1249 xdp->rxq = &rxqueue->xdp_rxq;
1250 /* The device is now tracked in the xdp->rxq for later
1255 xdp->data = xdp->data_meta + xdp_md->data;
1263 static void xdp_convert_buff_to_md(struct xdp_buff *xdp, struct xdp_md *xdp_md)
1268 xdp_md->data = xdp->data - xdp->data_meta;
1269 xdp_md->data_end = xdp->data_end - xdp->data_meta;
1271 if (xdp_md->ingress_ifindex)
1272 dev_put(xdp->rxq->dev);
1275 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1276 union bpf_attr __user *uattr)
1278 bool do_live = (kattr->test.flags & BPF_F_TEST_XDP_LIVE_FRAMES);
1279 u32 tailroom = SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
1280 u32 batch_size = kattr->test.batch_size;
1281 u32 retval = 0, duration, max_data_sz;
1282 u32 size = kattr->test.data_size_in;
1283 u32 headroom = XDP_PACKET_HEADROOM;
1284 u32 repeat = kattr->test.repeat;
1285 struct netdev_rx_queue *rxqueue;
1286 struct skb_shared_info *sinfo;
1287 struct xdp_buff xdp = {};
1288 int i, ret = -EINVAL;
1292 if (prog->expected_attach_type == BPF_XDP_DEVMAP ||
1293 prog->expected_attach_type == BPF_XDP_CPUMAP)
1296 if (kattr->test.flags & ~BPF_F_TEST_XDP_LIVE_FRAMES)
1301 batch_size = NAPI_POLL_WEIGHT;
1302 else if (batch_size > TEST_XDP_MAX_BATCH)
1305 headroom += sizeof(struct xdp_page_head);
1306 } else if (batch_size) {
1310 ctx = bpf_ctx_init(kattr, sizeof(struct xdp_md));
1312 return PTR_ERR(ctx);
1315 /* There can't be user provided data before the meta data */
1316 if (ctx->data_meta || ctx->data_end != size ||
1317 ctx->data > ctx->data_end ||
1318 unlikely(xdp_metalen_invalid(ctx->data)) ||
1319 (do_live && (kattr->test.data_out || kattr->test.ctx_out)))
1321 /* Meta data is allocated from the headroom */
1322 headroom -= ctx->data;
1325 max_data_sz = 4096 - headroom - tailroom;
1326 if (size > max_data_sz) {
1327 /* disallow live data mode for jumbo frames */
1333 data = bpf_test_init(kattr, size, max_data_sz, headroom, tailroom);
1335 ret = PTR_ERR(data);
1339 rxqueue = __netif_get_rx_queue(current->nsproxy->net_ns->loopback_dev, 0);
1340 rxqueue->xdp_rxq.frag_size = headroom + max_data_sz + tailroom;
1341 xdp_init_buff(&xdp, rxqueue->xdp_rxq.frag_size, &rxqueue->xdp_rxq);
1342 xdp_prepare_buff(&xdp, data, headroom, size, true);
1343 sinfo = xdp_get_shared_info_from_buff(&xdp);
1345 ret = xdp_convert_md_to_buff(ctx, &xdp);
1349 if (unlikely(kattr->test.data_size_in > size)) {
1350 void __user *data_in = u64_to_user_ptr(kattr->test.data_in);
1352 while (size < kattr->test.data_size_in) {
1357 if (sinfo->nr_frags == MAX_SKB_FRAGS) {
1362 page = alloc_page(GFP_KERNEL);
1368 frag = &sinfo->frags[sinfo->nr_frags++];
1369 __skb_frag_set_page(frag, page);
1371 data_len = min_t(u32, kattr->test.data_size_in - size,
1373 skb_frag_size_set(frag, data_len);
1375 if (copy_from_user(page_address(page), data_in + size,
1380 sinfo->xdp_frags_size += data_len;
1383 xdp_buff_set_frags_flag(&xdp);
1387 bpf_prog_change_xdp(NULL, prog);
1390 ret = bpf_test_run_xdp_live(prog, &xdp, repeat, batch_size, &duration);
1392 ret = bpf_test_run(prog, &xdp, repeat, &retval, &duration, true);
1393 /* We convert the xdp_buff back to an xdp_md before checking the return
1394 * code so the reference count of any held netdevice will be decremented
1395 * even if the test run failed.
1397 xdp_convert_buff_to_md(&xdp, ctx);
1401 size = xdp.data_end - xdp.data_meta + sinfo->xdp_frags_size;
1402 ret = bpf_test_finish(kattr, uattr, xdp.data_meta, sinfo, size,
1405 ret = bpf_ctx_finish(kattr, uattr, ctx,
1406 sizeof(struct xdp_md));
1410 bpf_prog_change_xdp(prog, NULL);
1412 for (i = 0; i < sinfo->nr_frags; i++)
1413 __free_page(skb_frag_page(&sinfo->frags[i]));
1420 static int verify_user_bpf_flow_keys(struct bpf_flow_keys *ctx)
1422 /* make sure the fields we don't use are zeroed */
1423 if (!range_is_zero(ctx, 0, offsetof(struct bpf_flow_keys, flags)))
1426 /* flags is allowed */
1428 if (!range_is_zero(ctx, offsetofend(struct bpf_flow_keys, flags),
1429 sizeof(struct bpf_flow_keys)))
1435 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1436 const union bpf_attr *kattr,
1437 union bpf_attr __user *uattr)
1439 struct bpf_test_timer t = { NO_PREEMPT };
1440 u32 size = kattr->test.data_size_in;
1441 struct bpf_flow_dissector ctx = {};
1442 u32 repeat = kattr->test.repeat;
1443 struct bpf_flow_keys *user_ctx;
1444 struct bpf_flow_keys flow_keys;
1445 const struct ethhdr *eth;
1446 unsigned int flags = 0;
1447 u32 retval, duration;
1451 if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size)
1454 if (size < ETH_HLEN)
1457 data = bpf_test_init(kattr, kattr->test.data_size_in, size, 0, 0);
1459 return PTR_ERR(data);
1461 eth = (struct ethhdr *)data;
1466 user_ctx = bpf_ctx_init(kattr, sizeof(struct bpf_flow_keys));
1467 if (IS_ERR(user_ctx)) {
1469 return PTR_ERR(user_ctx);
1472 ret = verify_user_bpf_flow_keys(user_ctx);
1475 flags = user_ctx->flags;
1478 ctx.flow_keys = &flow_keys;
1480 ctx.data_end = (__u8 *)data + size;
1482 bpf_test_timer_enter(&t);
1484 retval = bpf_flow_dissect(prog, &ctx, eth->h_proto, ETH_HLEN,
1486 } while (bpf_test_timer_continue(&t, 1, repeat, &ret, &duration));
1487 bpf_test_timer_leave(&t);
1492 ret = bpf_test_finish(kattr, uattr, &flow_keys, NULL,
1493 sizeof(flow_keys), retval, duration);
1495 ret = bpf_ctx_finish(kattr, uattr, user_ctx,
1496 sizeof(struct bpf_flow_keys));
1504 int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, const union bpf_attr *kattr,
1505 union bpf_attr __user *uattr)
1507 struct bpf_test_timer t = { NO_PREEMPT };
1508 struct bpf_prog_array *progs = NULL;
1509 struct bpf_sk_lookup_kern ctx = {};
1510 u32 repeat = kattr->test.repeat;
1511 struct bpf_sk_lookup *user_ctx;
1512 u32 retval, duration;
1515 if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size)
1518 if (kattr->test.data_in || kattr->test.data_size_in || kattr->test.data_out ||
1519 kattr->test.data_size_out)
1525 user_ctx = bpf_ctx_init(kattr, sizeof(*user_ctx));
1526 if (IS_ERR(user_ctx))
1527 return PTR_ERR(user_ctx);
1535 if (!range_is_zero(user_ctx, offsetofend(typeof(*user_ctx), local_port), sizeof(*user_ctx)))
1538 if (user_ctx->local_port > U16_MAX) {
1543 ctx.family = (u16)user_ctx->family;
1544 ctx.protocol = (u16)user_ctx->protocol;
1545 ctx.dport = (u16)user_ctx->local_port;
1546 ctx.sport = user_ctx->remote_port;
1548 switch (ctx.family) {
1550 ctx.v4.daddr = (__force __be32)user_ctx->local_ip4;
1551 ctx.v4.saddr = (__force __be32)user_ctx->remote_ip4;
1554 #if IS_ENABLED(CONFIG_IPV6)
1556 ctx.v6.daddr = (struct in6_addr *)user_ctx->local_ip6;
1557 ctx.v6.saddr = (struct in6_addr *)user_ctx->remote_ip6;
1562 ret = -EAFNOSUPPORT;
1566 progs = bpf_prog_array_alloc(1, GFP_KERNEL);
1572 progs->items[0].prog = prog;
1574 bpf_test_timer_enter(&t);
1576 ctx.selected_sk = NULL;
1577 retval = BPF_PROG_SK_LOOKUP_RUN_ARRAY(progs, ctx, bpf_prog_run);
1578 } while (bpf_test_timer_continue(&t, 1, repeat, &ret, &duration));
1579 bpf_test_timer_leave(&t);
1584 user_ctx->cookie = 0;
1585 if (ctx.selected_sk) {
1586 if (ctx.selected_sk->sk_reuseport && !ctx.no_reuseport) {
1591 user_ctx->cookie = sock_gen_cookie(ctx.selected_sk);
1594 ret = bpf_test_finish(kattr, uattr, NULL, NULL, 0, retval, duration);
1596 ret = bpf_ctx_finish(kattr, uattr, user_ctx, sizeof(*user_ctx));
1599 bpf_prog_array_free(progs);
1604 int bpf_prog_test_run_syscall(struct bpf_prog *prog,
1605 const union bpf_attr *kattr,
1606 union bpf_attr __user *uattr)
1608 void __user *ctx_in = u64_to_user_ptr(kattr->test.ctx_in);
1609 __u32 ctx_size_in = kattr->test.ctx_size_in;
1614 /* doesn't support data_in/out, ctx_out, duration, or repeat or flags */
1615 if (kattr->test.data_in || kattr->test.data_out ||
1616 kattr->test.ctx_out || kattr->test.duration ||
1617 kattr->test.repeat || kattr->test.flags ||
1618 kattr->test.batch_size)
1621 if (ctx_size_in < prog->aux->max_ctx_offset ||
1622 ctx_size_in > U16_MAX)
1626 ctx = memdup_user(ctx_in, ctx_size_in);
1628 return PTR_ERR(ctx);
1631 rcu_read_lock_trace();
1632 retval = bpf_prog_run_pin_on_cpu(prog, ctx);
1633 rcu_read_unlock_trace();
1635 if (copy_to_user(&uattr->test.retval, &retval, sizeof(u32))) {
1640 if (copy_to_user(ctx_in, ctx, ctx_size_in))
1647 static const struct btf_kfunc_id_set bpf_prog_test_kfunc_set = {
1648 .owner = THIS_MODULE,
1649 .set = &test_sk_check_kfunc_ids,
1652 BTF_ID_LIST(bpf_prog_test_dtor_kfunc_ids)
1653 BTF_ID(struct, prog_test_ref_kfunc)
1654 BTF_ID(func, bpf_kfunc_call_test_release)
1655 BTF_ID(struct, prog_test_member)
1656 BTF_ID(func, bpf_kfunc_call_memb_release)
1658 static int __init bpf_prog_test_run_init(void)
1660 const struct btf_id_dtor_kfunc bpf_prog_test_dtor_kfunc[] = {
1662 .btf_id = bpf_prog_test_dtor_kfunc_ids[0],
1663 .kfunc_btf_id = bpf_prog_test_dtor_kfunc_ids[1]
1666 .btf_id = bpf_prog_test_dtor_kfunc_ids[2],
1667 .kfunc_btf_id = bpf_prog_test_dtor_kfunc_ids[3],
1672 ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &bpf_prog_test_kfunc_set);
1673 ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &bpf_prog_test_kfunc_set);
1674 ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SYSCALL, &bpf_prog_test_kfunc_set);
1675 return ret ?: register_btf_id_dtor_kfuncs(bpf_prog_test_dtor_kfunc,
1676 ARRAY_SIZE(bpf_prog_test_dtor_kfunc),
1679 late_initcall(bpf_prog_test_run_init);