OSCL-LXR linux-6.0.1/​net/​bpf/​test_run.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-only
 /* Copyright (c) 2017 Facebook
  */
 #include <linux/bpf.h>
 #include <linux/btf.h>
 #include <linux/btf_ids.h>
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/vmalloc.h>
 #include <linux/etherdevice.h>
 #include <linux/filter.h>
 #include <linux/rcupdate_trace.h>
 #include <linux/sched/signal.h>
 #include <net/bpf_sk_storage.h>
 #include <net/sock.h>
 #include <net/tcp.h>
 #include <net/net_namespace.h>
 #include <net/page_pool.h>
 #include <linux/error-injection.h>
 #include <linux/smp.h>
 #include <linux/sock_diag.h>
 #include <net/xdp.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/bpf_test_run.h>
 
 struct bpf_test_timer {
     enum { NO_PREEMPT, NO_MIGRATE } mode;
     u32 i;
     u64 time_start, time_spent;
 };
 
 static void bpf_test_timer_enter(struct bpf_test_timer *t)
     __acquires(rcu)
 {
     rcu_read_lock();
     if (t->mode == NO_PREEMPT)
         preempt_disable();
     else
         migrate_disable();
 
     t->time_start = ktime_get_ns();
 }
 
 static void bpf_test_timer_leave(struct bpf_test_timer *t)
     __releases(rcu)
 {
     t->time_start = 0;
 
     if (t->mode == NO_PREEMPT)
         preempt_enable();
     else
         migrate_enable();
     rcu_read_unlock();
 }
 
 static bool bpf_test_timer_continue(struct bpf_test_timer *t, int iterations,
                     u32 repeat, int *err, u32 *duration)
     __must_hold(rcu)
 {
     t->i += iterations;
     if (t->i >= repeat) {
         /* We're done. */
         t->time_spent += ktime_get_ns() - t->time_start;
         do_div(t->time_spent, t->i);
         *duration = t->time_spent > U32_MAX ? U32_MAX : (u32)t->time_spent;
         *err = 0;
         goto reset;
     }
 
     if (signal_pending(current)) {
         /* During iteration: we've been cancelled, abort. */
         *err = -EINTR;
         goto reset;
     }
 
     if (need_resched()) {
         /* During iteration: we need to reschedule between runs. */
         t->time_spent += ktime_get_ns() - t->time_start;
         bpf_test_timer_leave(t);
         cond_resched();
         bpf_test_timer_enter(t);
     }
 
     /* Do another round. */
     return true;
 
 reset:
     t->i = 0;
     return false;
 }
 
 /* We put this struct at the head of each page with a context and frame
  * initialised when the page is allocated, so we don't have to do this on each
  * repetition of the test run.
  */
 struct xdp_page_head {
     struct xdp_buff orig_ctx;
     struct xdp_buff ctx;
     struct xdp_frame frm;
     u8 data[];
 };
 
 struct xdp_test_data {
     struct xdp_buff *orig_ctx;
     struct xdp_rxq_info rxq;
     struct net_device *dev;
     struct page_pool *pp;
     struct xdp_frame **frames;
     struct sk_buff **skbs;
     struct xdp_mem_info mem;
     u32 batch_size;
     u32 frame_cnt;
 };
 
 #define TEST_XDP_FRAME_SIZE (PAGE_SIZE - sizeof(struct xdp_page_head))
 #define TEST_XDP_MAX_BATCH 256
 
 static void xdp_test_run_init_page(struct page *page, void *arg)
 {
     struct xdp_page_head *head = phys_to_virt(page_to_phys(page));
     struct xdp_buff *new_ctx, *orig_ctx;
     u32 headroom = XDP_PACKET_HEADROOM;
     struct xdp_test_data *xdp = arg;
     size_t frm_len, meta_len;
     struct xdp_frame *frm;
     void *data;
 
     orig_ctx = xdp->orig_ctx;
     frm_len = orig_ctx->data_end - orig_ctx->data_meta;
     meta_len = orig_ctx->data - orig_ctx->data_meta;
     headroom -= meta_len;
 
     new_ctx = &head->ctx;
     frm = &head->frm;
     data = &head->data;
     memcpy(data + headroom, orig_ctx->data_meta, frm_len);
 
     xdp_init_buff(new_ctx, TEST_XDP_FRAME_SIZE, &xdp->rxq);
     xdp_prepare_buff(new_ctx, data, headroom, frm_len, true);
     new_ctx->data = new_ctx->data_meta + meta_len;
 
     xdp_update_frame_from_buff(new_ctx, frm);
     frm->mem = new_ctx->rxq->mem;
 
     memcpy(&head->orig_ctx, new_ctx, sizeof(head->orig_ctx));
 }
 
 static int xdp_test_run_setup(struct xdp_test_data *xdp, struct xdp_buff *orig_ctx)
 {
     struct page_pool *pp;
     int err = -ENOMEM;
     struct page_pool_params pp_params = {
         .order = 0,
         .flags = 0,
         .pool_size = xdp->batch_size,
         .nid = NUMA_NO_NODE,
         .init_callback = xdp_test_run_init_page,
         .init_arg = xdp,
     };
 
     xdp->frames = kvmalloc_array(xdp->batch_size, sizeof(void *), GFP_KERNEL);
     if (!xdp->frames)
         return -ENOMEM;
 
     xdp->skbs = kvmalloc_array(xdp->batch_size, sizeof(void *), GFP_KERNEL);
     if (!xdp->skbs)
         goto err_skbs;
 
     pp = page_pool_create(&pp_params);
     if (IS_ERR(pp)) {
         err = PTR_ERR(pp);
         goto err_pp;
     }
 
     /* will copy 'mem.id' into pp->xdp_mem_id */
     err = xdp_reg_mem_model(&xdp->mem, MEM_TYPE_PAGE_POOL, pp);
     if (err)
         goto err_mmodel;
 
     xdp->pp = pp;
 
     /* We create a 'fake' RXQ referencing the original dev, but with an
      * xdp_mem_info pointing to our page_pool
      */
     xdp_rxq_info_reg(&xdp->rxq, orig_ctx->rxq->dev, 0, 0);
     xdp->rxq.mem.type = MEM_TYPE_PAGE_POOL;
     xdp->rxq.mem.id = pp->xdp_mem_id;
     xdp->dev = orig_ctx->rxq->dev;
     xdp->orig_ctx = orig_ctx;
 
     return 0;
 
 err_mmodel:
     page_pool_destroy(pp);
 err_pp:
     kvfree(xdp->skbs);
 err_skbs:
     kvfree(xdp->frames);
     return err;
 }
 
 static void xdp_test_run_teardown(struct xdp_test_data *xdp)
 {
     xdp_unreg_mem_model(&xdp->mem);
     page_pool_destroy(xdp->pp);
     kfree(xdp->frames);
     kfree(xdp->skbs);
 }
 
 static bool ctx_was_changed(struct xdp_page_head *head)
 {
     return head->orig_ctx.data != head->ctx.data ||
         head->orig_ctx.data_meta != head->ctx.data_meta ||
         head->orig_ctx.data_end != head->ctx.data_end;
 }
 
 static void reset_ctx(struct xdp_page_head *head)
 {
     if (likely(!ctx_was_changed(head)))
         return;
 
     head->ctx.data = head->orig_ctx.data;
     head->ctx.data_meta = head->orig_ctx.data_meta;
     head->ctx.data_end = head->orig_ctx.data_end;
     xdp_update_frame_from_buff(&head->ctx, &head->frm);
 }
 
 static int xdp_recv_frames(struct xdp_frame **frames, int nframes,
                struct sk_buff **skbs,
                struct net_device *dev)
 {
     gfp_t gfp = __GFP_ZERO | GFP_ATOMIC;
     int i, n;
     LIST_HEAD(list);
 
     n = kmem_cache_alloc_bulk(skbuff_head_cache, gfp, nframes, (void **)skbs);
     if (unlikely(n == 0)) {
         for (i = 0; i < nframes; i++)
             xdp_return_frame(frames[i]);
         return -ENOMEM;
     }
 
     for (i = 0; i < nframes; i++) {
         struct xdp_frame *xdpf = frames[i];
         struct sk_buff *skb = skbs[i];
 
         skb = __xdp_build_skb_from_frame(xdpf, skb, dev);
         if (!skb) {
             xdp_return_frame(xdpf);
             continue;
         }
 
         list_add_tail(&skb->list, &list);
     }
     netif_receive_skb_list(&list);
 
     return 0;
 }
 
 static int xdp_test_run_batch(struct xdp_test_data *xdp, struct bpf_prog *prog,
                   u32 repeat)
 {
     struct bpf_redirect_info *ri = this_cpu_ptr(&bpf_redirect_info);
     int err = 0, act, ret, i, nframes = 0, batch_sz;
     struct xdp_frame **frames = xdp->frames;
     struct xdp_page_head *head;
     struct xdp_frame *frm;
     bool redirect = false;
     struct xdp_buff *ctx;
     struct page *page;
 
     batch_sz = min_t(u32, repeat, xdp->batch_size);
 
     local_bh_disable();
     xdp_set_return_frame_no_direct();
 
     for (i = 0; i < batch_sz; i++) {
         page = page_pool_dev_alloc_pages(xdp->pp);
         if (!page) {
             err = -ENOMEM;
             goto out;
         }
 
         head = phys_to_virt(page_to_phys(page));
         reset_ctx(head);
         ctx = &head->ctx;
         frm = &head->frm;
         xdp->frame_cnt++;
 
         act = bpf_prog_run_xdp(prog, ctx);
 
         /* if program changed pkt bounds we need to update the xdp_frame */
         if (unlikely(ctx_was_changed(head))) {
             ret = xdp_update_frame_from_buff(ctx, frm);
             if (ret) {
                 xdp_return_buff(ctx);
                 continue;
             }
         }
 
         switch (act) {
         case XDP_TX:
             /* we can't do a real XDP_TX since we're not in the
              * driver, so turn it into a REDIRECT back to the same
              * index
              */
             ri->tgt_index = xdp->dev->ifindex;
             ri->map_id = INT_MAX;
             ri->map_type = BPF_MAP_TYPE_UNSPEC;
             fallthrough;
         case XDP_REDIRECT:
             redirect = true;
             ret = xdp_do_redirect_frame(xdp->dev, ctx, frm, prog);
             if (ret)
                 xdp_return_buff(ctx);
             break;
         case XDP_PASS:
             frames[nframes++] = frm;
             break;
         default:
             bpf_warn_invalid_xdp_action(NULL, prog, act);
             fallthrough;
         case XDP_DROP:
             xdp_return_buff(ctx);
             break;
         }
     }
 
 out:
     if (redirect)
         xdp_do_flush();
     if (nframes) {
         ret = xdp_recv_frames(frames, nframes, xdp->skbs, xdp->dev);
         if (ret)
             err = ret;
     }
 
     xdp_clear_return_frame_no_direct();
     local_bh_enable();
     return err;
 }
 
 static int bpf_test_run_xdp_live(struct bpf_prog *prog, struct xdp_buff *ctx,
                  u32 repeat, u32 batch_size, u32 *time)
 
 {
     struct xdp_test_data xdp = { .batch_size = batch_size };
     struct bpf_test_timer t = { .mode = NO_MIGRATE };
     int ret;
 
     if (!repeat)
         repeat = 1;
 
     ret = xdp_test_run_setup(&xdp, ctx);
     if (ret)
         return ret;
 
     bpf_test_timer_enter(&t);
     do {
         xdp.frame_cnt = 0;
         ret = xdp_test_run_batch(&xdp, prog, repeat - t.i);
         if (unlikely(ret < 0))
             break;
     } while (bpf_test_timer_continue(&t, xdp.frame_cnt, repeat, &ret, time));
     bpf_test_timer_leave(&t);
 
     xdp_test_run_teardown(&xdp);
     return ret;
 }
 
 static int bpf_test_run(struct bpf_prog *prog, void *ctx, u32 repeat,
             u32 *retval, u32 *time, bool xdp)
 {
     struct bpf_prog_array_item item = {.prog = prog};
     struct bpf_run_ctx *old_ctx;
     struct bpf_cg_run_ctx run_ctx;
     struct bpf_test_timer t = { NO_MIGRATE };
     enum bpf_cgroup_storage_type stype;
     int ret;
 
     for_each_cgroup_storage_type(stype) {
         item.cgroup_storage[stype] = bpf_cgroup_storage_alloc(prog, stype);
         if (IS_ERR(item.cgroup_storage[stype])) {
             item.cgroup_storage[stype] = NULL;
             for_each_cgroup_storage_type(stype)
                 bpf_cgroup_storage_free(item.cgroup_storage[stype]);
             return -ENOMEM;
         }
     }
 
     if (!repeat)
         repeat = 1;
 
     bpf_test_timer_enter(&t);
     old_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
     do {
         run_ctx.prog_item = &item;
         if (xdp)
             *retval = bpf_prog_run_xdp(prog, ctx);
         else
             *retval = bpf_prog_run(prog, ctx);
     } while (bpf_test_timer_continue(&t, 1, repeat, &ret, time));
     bpf_reset_run_ctx(old_ctx);
     bpf_test_timer_leave(&t);
 
     for_each_cgroup_storage_type(stype)
         bpf_cgroup_storage_free(item.cgroup_storage[stype]);
 
     return ret;
 }
 
 static int bpf_test_finish(const union bpf_attr *kattr,
                union bpf_attr __user *uattr, const void *data,
                struct skb_shared_info *sinfo, u32 size,
                u32 retval, u32 duration)
 {
     void __user *data_out = u64_to_user_ptr(kattr->test.data_out);
     int err = -EFAULT;
     u32 copy_size = size;
 
     /* Clamp copy if the user has provided a size hint, but copy the full
      * buffer if not to retain old behaviour.
      */
     if (kattr->test.data_size_out &&
         copy_size > kattr->test.data_size_out) {
         copy_size = kattr->test.data_size_out;
         err = -ENOSPC;
     }
 
     if (data_out) {
         int len = sinfo ? copy_size - sinfo->xdp_frags_size : copy_size;
 
         if (len < 0) {
             err = -ENOSPC;
             goto out;
         }
 
         if (copy_to_user(data_out, data, len))
             goto out;
 
         if (sinfo) {
             int i, offset = len;
             u32 data_len;
 
             for (i = 0; i < sinfo->nr_frags; i++) {
                 skb_frag_t *frag = &sinfo->frags[i];
 
                 if (offset >= copy_size) {
                     err = -ENOSPC;
                     break;
                 }
 
                 data_len = min_t(u32, copy_size - offset,
                          skb_frag_size(frag));
 
                 if (copy_to_user(data_out + offset,
                          skb_frag_address(frag),
                          data_len))
                     goto out;
 
                 offset += data_len;
             }
         }
     }
 
     if (copy_to_user(&uattr->test.data_size_out, &size, sizeof(size)))
         goto out;
     if (copy_to_user(&uattr->test.retval, &retval, sizeof(retval)))
         goto out;
     if (copy_to_user(&uattr->test.duration, &duration, sizeof(duration)))
         goto out;
     if (err != -ENOSPC)
         err = 0;
 out:
     trace_bpf_test_finish(&err);
     return err;
 }
 
 /* Integer types of various sizes and pointer combinations cover variety of
  * architecture dependent calling conventions. 7+ can be supported in the
  * future.
  */
 __diag_push();
 __diag_ignore_all("-Wmissing-prototypes",
           "Global functions as their definitions will be in vmlinux BTF");
 int noinline bpf_fentry_test1(int a)
 {
     return a + 1;
 }
 EXPORT_SYMBOL_GPL(bpf_fentry_test1);
 ALLOW_ERROR_INJECTION(bpf_fentry_test1, ERRNO);
 
 int noinline bpf_fentry_test2(int a, u64 b)
 {
     return a + b;
 }
 
 int noinline bpf_fentry_test3(char a, int b, u64 c)
 {
     return a + b + c;
 }
 
 int noinline bpf_fentry_test4(void *a, char b, int c, u64 d)
 {
     return (long)a + b + c + d;
 }
 
 int noinline bpf_fentry_test5(u64 a, void *b, short c, int d, u64 e)
 {
     return a + (long)b + c + d + e;
 }
 
 int noinline bpf_fentry_test6(u64 a, void *b, short c, int d, void *e, u64 f)
 {
     return a + (long)b + c + d + (long)e + f;
 }
 
 struct bpf_fentry_test_t {
     struct bpf_fentry_test_t *a;
 };
 
 int noinline bpf_fentry_test7(struct bpf_fentry_test_t *arg)
 {
     return (long)arg;
 }
 
 int noinline bpf_fentry_test8(struct bpf_fentry_test_t *arg)
 {
     return (long)arg->a;
 }
 
 int noinline bpf_modify_return_test(int a, int *b)
 {
     *b += 1;
     return a + *b;
 }
 
 u64 noinline bpf_kfunc_call_test1(struct sock *sk, u32 a, u64 b, u32 c, u64 d)
 {
     return a + b + c + d;
 }
 
 int noinline bpf_kfunc_call_test2(struct sock *sk, u32 a, u32 b)
 {
     return a + b;
 }
 
 struct sock * noinline bpf_kfunc_call_test3(struct sock *sk)
 {
     return sk;
 }
 
 struct prog_test_member1 {
     int a;
 };
 
 struct prog_test_member {
     struct prog_test_member1 m;
     int c;
 };
 
 struct prog_test_ref_kfunc {
     int a;
     int b;
     struct prog_test_member memb;
     struct prog_test_ref_kfunc *next;
     refcount_t cnt;
 };
 
 static struct prog_test_ref_kfunc prog_test_struct = {
     .a = 42,
     .b = 108,
     .next = &prog_test_struct,
     .cnt = REFCOUNT_INIT(1),
 };
 
 noinline struct prog_test_ref_kfunc *
 bpf_kfunc_call_test_acquire(unsigned long *scalar_ptr)
 {
     refcount_inc(&prog_test_struct.cnt);
     return &prog_test_struct;
 }
 
 noinline struct prog_test_member *
 bpf_kfunc_call_memb_acquire(void)
 {
     WARN_ON_ONCE(1);
     return NULL;
 }
 
 noinline void bpf_kfunc_call_test_release(struct prog_test_ref_kfunc *p)
 {
     if (!p)
         return;
 
     refcount_dec(&p->cnt);
 }
 
 noinline void bpf_kfunc_call_memb_release(struct prog_test_member *p)
 {
 }
 
 noinline void bpf_kfunc_call_memb1_release(struct prog_test_member1 *p)
 {
     WARN_ON_ONCE(1);
 }
 
 noinline struct prog_test_ref_kfunc *
 bpf_kfunc_call_test_kptr_get(struct prog_test_ref_kfunc **pp, int a, int b)
 {
     struct prog_test_ref_kfunc *p = READ_ONCE(*pp);
 
     if (!p)
         return NULL;
     refcount_inc(&p->cnt);
     return p;
 }
 
 struct prog_test_pass1 {
     int x0;
     struct {
         int x1;
         struct {
             int x2;
             struct {
                 int x3;
             };
         };
     };
 };
 
 struct prog_test_pass2 {
     int len;
     short arr1[4];
     struct {
         char arr2[4];
         unsigned long arr3[8];
     } x;
 };
 
 struct prog_test_fail1 {
     void *p;
     int x;
 };
 
 struct prog_test_fail2 {
     int x8;
     struct prog_test_pass1 x;
 };
 
 struct prog_test_fail3 {
     int len;
     char arr1[2];
     char arr2[];
 };
 
 noinline void bpf_kfunc_call_test_pass_ctx(struct __sk_buff *skb)
 {
 }
 
 noinline void bpf_kfunc_call_test_pass1(struct prog_test_pass1 *p)
 {
 }
 
 noinline void bpf_kfunc_call_test_pass2(struct prog_test_pass2 *p)
 {
 }
 
 noinline void bpf_kfunc_call_test_fail1(struct prog_test_fail1 *p)
 {
 }
 
 noinline void bpf_kfunc_call_test_fail2(struct prog_test_fail2 *p)
 {
 }
 
 noinline void bpf_kfunc_call_test_fail3(struct prog_test_fail3 *p)
 {
 }
 
 noinline void bpf_kfunc_call_test_mem_len_pass1(void *mem, int mem__sz)
 {
 }
 
 noinline void bpf_kfunc_call_test_mem_len_fail1(void *mem, int len)
 {
 }
 
 noinline void bpf_kfunc_call_test_mem_len_fail2(u64 *mem, int len)
 {
 }
 
 noinline void bpf_kfunc_call_test_ref(struct prog_test_ref_kfunc *p)
 {
 }
 
 __diag_pop();
 
 ALLOW_ERROR_INJECTION(bpf_modify_return_test, ERRNO);
 
 BTF_SET8_START(test_sk_check_kfunc_ids)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test1)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test2)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test3)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_acquire, KF_ACQUIRE | KF_RET_NULL)
 BTF_ID_FLAGS(func, bpf_kfunc_call_memb_acquire, KF_ACQUIRE | KF_RET_NULL)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_release, KF_RELEASE)
 BTF_ID_FLAGS(func, bpf_kfunc_call_memb_release, KF_RELEASE)
 BTF_ID_FLAGS(func, bpf_kfunc_call_memb1_release, KF_RELEASE)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_kptr_get, KF_ACQUIRE | KF_RET_NULL | KF_KPTR_GET)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_pass_ctx)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_pass1)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_pass2)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_fail1)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_fail2)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_fail3)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_mem_len_pass1)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_mem_len_fail1)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_mem_len_fail2)
 BTF_ID_FLAGS(func, bpf_kfunc_call_test_ref, KF_TRUSTED_ARGS)
 BTF_SET8_END(test_sk_check_kfunc_ids)
 
 static void *bpf_test_init(const union bpf_attr *kattr, u32 user_size,
                u32 size, u32 headroom, u32 tailroom)
 {
     void __user *data_in = u64_to_user_ptr(kattr->test.data_in);
     void *data;
 
     if (size < ETH_HLEN || size > PAGE_SIZE - headroom - tailroom)
         return ERR_PTR(-EINVAL);
 
     if (user_size > size)
         return ERR_PTR(-EMSGSIZE);
 
     data = kzalloc(size + headroom + tailroom, GFP_USER);
     if (!data)
         return ERR_PTR(-ENOMEM);
 
     if (copy_from_user(data + headroom, data_in, user_size)) {
         kfree(data);
         return ERR_PTR(-EFAULT);
     }
 
     return data;
 }
 
 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
                   const union bpf_attr *kattr,
                   union bpf_attr __user *uattr)
 {
     struct bpf_fentry_test_t arg = {};
     u16 side_effect = 0, ret = 0;
     int b = 2, err = -EFAULT;
     u32 retval = 0;
 
     if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size)
         return -EINVAL;
 
     switch (prog->expected_attach_type) {
     case BPF_TRACE_FENTRY:
     case BPF_TRACE_FEXIT:
         if (bpf_fentry_test1(1) != 2 ||
             bpf_fentry_test2(2, 3) != 5 ||
             bpf_fentry_test3(4, 5, 6) != 15 ||
             bpf_fentry_test4((void *)7, 8, 9, 10) != 34 ||
             bpf_fentry_test5(11, (void *)12, 13, 14, 15) != 65 ||
             bpf_fentry_test6(16, (void *)17, 18, 19, (void *)20, 21) != 111 ||
             bpf_fentry_test7((struct bpf_fentry_test_t *)0) != 0 ||
             bpf_fentry_test8(&arg) != 0)
             goto out;
         break;
     case BPF_MODIFY_RETURN:
         ret = bpf_modify_return_test(1, &b);
         if (b != 2)
             side_effect = 1;
         break;
     default:
         goto out;
     }
 
     retval = ((u32)side_effect << 16) | ret;
     if (copy_to_user(&uattr->test.retval, &retval, sizeof(retval)))
         goto out;
 
     err = 0;
 out:
     trace_bpf_test_finish(&err);
     return err;
 }
 
 struct bpf_raw_tp_test_run_info {
     struct bpf_prog *prog;
     void *ctx;
     u32 retval;
 };
 
 static void
 __bpf_prog_test_run_raw_tp(void *data)
 {
     struct bpf_raw_tp_test_run_info *info = data;
 
     rcu_read_lock();
     info->retval = bpf_prog_run(info->prog, info->ctx);
     rcu_read_unlock();
 }
 
 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
                  const union bpf_attr *kattr,
                  union bpf_attr __user *uattr)
 {
     void __user *ctx_in = u64_to_user_ptr(kattr->test.ctx_in);
     __u32 ctx_size_in = kattr->test.ctx_size_in;
     struct bpf_raw_tp_test_run_info info;
     int cpu = kattr->test.cpu, err = 0;
     int current_cpu;
 
     /* doesn't support data_in/out, ctx_out, duration, or repeat */
     if (kattr->test.data_in || kattr->test.data_out ||
         kattr->test.ctx_out || kattr->test.duration ||
         kattr->test.repeat || kattr->test.batch_size)
         return -EINVAL;
 
     if (ctx_size_in < prog->aux->max_ctx_offset ||
         ctx_size_in > MAX_BPF_FUNC_ARGS * sizeof(u64))
         return -EINVAL;
 
     if ((kattr->test.flags & BPF_F_TEST_RUN_ON_CPU) == 0 && cpu != 0)
         return -EINVAL;
 
     if (ctx_size_in) {
         info.ctx = memdup_user(ctx_in, ctx_size_in);
         if (IS_ERR(info.ctx))
             return PTR_ERR(info.ctx);
     } else {
         info.ctx = NULL;
     }
 
     info.prog = prog;
 
     current_cpu = get_cpu();
     if ((kattr->test.flags & BPF_F_TEST_RUN_ON_CPU) == 0 ||
         cpu == current_cpu) {
         __bpf_prog_test_run_raw_tp(&info);
     } else if (cpu >= nr_cpu_ids || !cpu_online(cpu)) {
         /* smp_call_function_single() also checks cpu_online()
          * after csd_lock(). However, since cpu is from user
          * space, let's do an extra quick check to filter out
          * invalid value before smp_call_function_single().
          */
         err = -ENXIO;
     } else {
         err = smp_call_function_single(cpu, __bpf_prog_test_run_raw_tp,
                            &info, 1);
     }
     put_cpu();
 
     if (!err &&
         copy_to_user(&uattr->test.retval, &info.retval, sizeof(u32)))
         err = -EFAULT;
 
     kfree(info.ctx);
     return err;
 }
 
 static void *bpf_ctx_init(const union bpf_attr *kattr, u32 max_size)
 {
     void __user *data_in = u64_to_user_ptr(kattr->test.ctx_in);
     void __user *data_out = u64_to_user_ptr(kattr->test.ctx_out);
     u32 size = kattr->test.ctx_size_in;
     void *data;
     int err;
 
     if (!data_in && !data_out)
         return NULL;
 
     data = kzalloc(max_size, GFP_USER);
     if (!data)
         return ERR_PTR(-ENOMEM);
 
     if (data_in) {
         err = bpf_check_uarg_tail_zero(USER_BPFPTR(data_in), max_size, size);
         if (err) {
             kfree(data);
             return ERR_PTR(err);
         }
 
         size = min_t(u32, max_size, size);
         if (copy_from_user(data, data_in, size)) {
             kfree(data);
             return ERR_PTR(-EFAULT);
         }
     }
     return data;
 }
 
 static int bpf_ctx_finish(const union bpf_attr *kattr,
               union bpf_attr __user *uattr, const void *data,
               u32 size)
 {
     void __user *data_out = u64_to_user_ptr(kattr->test.ctx_out);
     int err = -EFAULT;
     u32 copy_size = size;
 
     if (!data || !data_out)
         return 0;
 
     if (copy_size > kattr->test.ctx_size_out) {
         copy_size = kattr->test.ctx_size_out;
         err = -ENOSPC;
     }
 
     if (copy_to_user(data_out, data, copy_size))
         goto out;
     if (copy_to_user(&uattr->test.ctx_size_out, &size, sizeof(size)))
         goto out;
     if (err != -ENOSPC)
         err = 0;
 out:
     return err;
 }
 
 /**
  * range_is_zero - test whether buffer is initialized
  * @buf: buffer to check
  * @from: check from this position
  * @to: check up until (excluding) this position
  *
  * This function returns true if the there is a non-zero byte
  * in the buf in the range [from,to).
  */
 static inline bool range_is_zero(void *buf, size_t from, size_t to)
 {
     return !memchr_inv((u8 *)buf + from, 0, to - from);
 }
 
 static int convert___skb_to_skb(struct sk_buff *skb, struct __sk_buff *__skb)
 {
     struct qdisc_skb_cb *cb = (struct qdisc_skb_cb *)skb->cb;
 
     if (!skb->len)
         return -EINVAL;
 
     if (!__skb)
         return 0;
 
     /* make sure the fields we don't use are zeroed */
     if (!range_is_zero(__skb, 0, offsetof(struct __sk_buff, mark)))
         return -EINVAL;
 
     /* mark is allowed */
 
     if (!range_is_zero(__skb, offsetofend(struct __sk_buff, mark),
                offsetof(struct __sk_buff, priority)))
         return -EINVAL;
 
     /* priority is allowed */
     /* ingress_ifindex is allowed */
     /* ifindex is allowed */
 
     if (!range_is_zero(__skb, offsetofend(struct __sk_buff, ifindex),
                offsetof(struct __sk_buff, cb)))
         return -EINVAL;
 
     /* cb is allowed */
 
     if (!range_is_zero(__skb, offsetofend(struct __sk_buff, cb),
                offsetof(struct __sk_buff, tstamp)))
         return -EINVAL;
 
     /* tstamp is allowed */
     /* wire_len is allowed */
     /* gso_segs is allowed */
 
     if (!range_is_zero(__skb, offsetofend(struct __sk_buff, gso_segs),
                offsetof(struct __sk_buff, gso_size)))
         return -EINVAL;
 
     /* gso_size is allowed */
 
     if (!range_is_zero(__skb, offsetofend(struct __sk_buff, gso_size),
                offsetof(struct __sk_buff, hwtstamp)))
         return -EINVAL;
 
     /* hwtstamp is allowed */
 
     if (!range_is_zero(__skb, offsetofend(struct __sk_buff, hwtstamp),
                sizeof(struct __sk_buff)))
         return -EINVAL;
 
     skb->mark = __skb->mark;
     skb->priority = __skb->priority;
     skb->skb_iif = __skb->ingress_ifindex;
     skb->tstamp = __skb->tstamp;
     memcpy(&cb->data, __skb->cb, QDISC_CB_PRIV_LEN);
 
     if (__skb->wire_len == 0) {
         cb->pkt_len = skb->len;
     } else {
         if (__skb->wire_len < skb->len ||
             __skb->wire_len > GSO_LEGACY_MAX_SIZE)
             return -EINVAL;
         cb->pkt_len = __skb->wire_len;
     }
 
     if (__skb->gso_segs > GSO_MAX_SEGS)
         return -EINVAL;
     skb_shinfo(skb)->gso_segs = __skb->gso_segs;
     skb_shinfo(skb)->gso_size = __skb->gso_size;
     skb_shinfo(skb)->hwtstamps.hwtstamp = __skb->hwtstamp;
 
     return 0;
 }
 
 static void convert_skb_to___skb(struct sk_buff *skb, struct __sk_buff *__skb)
 {
     struct qdisc_skb_cb *cb = (struct qdisc_skb_cb *)skb->cb;
 
     if (!__skb)
         return;
 
     __skb->mark = skb->mark;
     __skb->priority = skb->priority;
     __skb->ingress_ifindex = skb->skb_iif;
     __skb->ifindex = skb->dev->ifindex;
     __skb->tstamp = skb->tstamp;
     memcpy(__skb->cb, &cb->data, QDISC_CB_PRIV_LEN);
     __skb->wire_len = cb->pkt_len;
     __skb->gso_segs = skb_shinfo(skb)->gso_segs;
     __skb->hwtstamp = skb_shinfo(skb)->hwtstamps.hwtstamp;
 }
 
 static struct proto bpf_dummy_proto = {
     .name   = "bpf_dummy",
     .owner  = THIS_MODULE,
     .obj_size = sizeof(struct sock),
 };
 
 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
               union bpf_attr __user *uattr)
 {
     bool is_l2 = false, is_direct_pkt_access = false;
     struct net *net = current->nsproxy->net_ns;
     struct net_device *dev = net->loopback_dev;
     u32 size = kattr->test.data_size_in;
     u32 repeat = kattr->test.repeat;
     struct __sk_buff *ctx = NULL;
     u32 retval, duration;
     int hh_len = ETH_HLEN;
     struct sk_buff *skb;
     struct sock *sk;
     void *data;
     int ret;
 
     if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size)
         return -EINVAL;
 
     data = bpf_test_init(kattr, kattr->test.data_size_in,
                  size, NET_SKB_PAD + NET_IP_ALIGN,
                  SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
     if (IS_ERR(data))
         return PTR_ERR(data);
 
     ctx = bpf_ctx_init(kattr, sizeof(struct __sk_buff));
     if (IS_ERR(ctx)) {
         kfree(data);
         return PTR_ERR(ctx);
     }
 
     switch (prog->type) {
     case BPF_PROG_TYPE_SCHED_CLS:
     case BPF_PROG_TYPE_SCHED_ACT:
         is_l2 = true;
         fallthrough;
     case BPF_PROG_TYPE_LWT_IN:
     case BPF_PROG_TYPE_LWT_OUT:
     case BPF_PROG_TYPE_LWT_XMIT:
         is_direct_pkt_access = true;
         break;
     default:
         break;
     }
 
     sk = sk_alloc(net, AF_UNSPEC, GFP_USER, &bpf_dummy_proto, 1);
     if (!sk) {
         kfree(data);
         kfree(ctx);
         return -ENOMEM;
     }
     sock_init_data(NULL, sk);
 
     skb = build_skb(data, 0);
     if (!skb) {
         kfree(data);
         kfree(ctx);
         sk_free(sk);
         return -ENOMEM;
     }
     skb->sk = sk;
 
     skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
     __skb_put(skb, size);
     if (ctx && ctx->ifindex > 1) {
         dev = dev_get_by_index(net, ctx->ifindex);
         if (!dev) {
             ret = -ENODEV;
             goto out;
         }
     }
     skb->protocol = eth_type_trans(skb, dev);
     skb_reset_network_header(skb);
 
     switch (skb->protocol) {
     case htons(ETH_P_IP):
         sk->sk_family = AF_INET;
         if (sizeof(struct iphdr) <= skb_headlen(skb)) {
             sk->sk_rcv_saddr = ip_hdr(skb)->saddr;
             sk->sk_daddr = ip_hdr(skb)->daddr;
         }
         break;
 #if IS_ENABLED(CONFIG_IPV6)
     case htons(ETH_P_IPV6):
         sk->sk_family = AF_INET6;
         if (sizeof(struct ipv6hdr) <= skb_headlen(skb)) {
             sk->sk_v6_rcv_saddr = ipv6_hdr(skb)->saddr;
             sk->sk_v6_daddr = ipv6_hdr(skb)->daddr;
         }
         break;
 #endif
     default:
         break;
     }
 
     if (is_l2)
         __skb_push(skb, hh_len);
     if (is_direct_pkt_access)
         bpf_compute_data_pointers(skb);
     ret = convert___skb_to_skb(skb, ctx);
     if (ret)
         goto out;
     ret = bpf_test_run(prog, skb, repeat, &retval, &duration, false);
     if (ret)
         goto out;
     if (!is_l2) {
         if (skb_headroom(skb) < hh_len) {
             int nhead = HH_DATA_ALIGN(hh_len - skb_headroom(skb));
 
             if (pskb_expand_head(skb, nhead, 0, GFP_USER)) {
                 ret = -ENOMEM;
                 goto out;
             }
         }
         memset(__skb_push(skb, hh_len), 0, hh_len);
     }
     convert_skb_to___skb(skb, ctx);
 
     size = skb->len;
     /* bpf program can never convert linear skb to non-linear */
     if (WARN_ON_ONCE(skb_is_nonlinear(skb)))
         size = skb_headlen(skb);
     ret = bpf_test_finish(kattr, uattr, skb->data, NULL, size, retval,
                   duration);
     if (!ret)
         ret = bpf_ctx_finish(kattr, uattr, ctx,
                      sizeof(struct __sk_buff));
 out:
     if (dev && dev != net->loopback_dev)
         dev_put(dev);
     kfree_skb(skb);
     sk_free(sk);
     kfree(ctx);
     return ret;
 }
 
 static int xdp_convert_md_to_buff(struct xdp_md *xdp_md, struct xdp_buff *xdp)
 {
     unsigned int ingress_ifindex, rx_queue_index;
     struct netdev_rx_queue *rxqueue;
     struct net_device *device;
 
     if (!xdp_md)
         return 0;
 
     if (xdp_md->egress_ifindex != 0)
         return -EINVAL;
 
     ingress_ifindex = xdp_md->ingress_ifindex;
     rx_queue_index = xdp_md->rx_queue_index;
 
     if (!ingress_ifindex && rx_queue_index)
         return -EINVAL;
 
     if (ingress_ifindex) {
         device = dev_get_by_index(current->nsproxy->net_ns,
                       ingress_ifindex);
         if (!device)
             return -ENODEV;
 
         if (rx_queue_index >= device->real_num_rx_queues)
             goto free_dev;
 
         rxqueue = __netif_get_rx_queue(device, rx_queue_index);
 
         if (!xdp_rxq_info_is_reg(&rxqueue->xdp_rxq))
             goto free_dev;
 
         xdp->rxq = &rxqueue->xdp_rxq;
         /* The device is now tracked in the xdp->rxq for later
          * dev_put()
          */
     }
 
     xdp->data = xdp->data_meta + xdp_md->data;
     return 0;
 
 free_dev:
     dev_put(device);
     return -EINVAL;
 }
 
 static void xdp_convert_buff_to_md(struct xdp_buff *xdp, struct xdp_md *xdp_md)
 {
     if (!xdp_md)
         return;
 
     xdp_md->data = xdp->data - xdp->data_meta;
     xdp_md->data_end = xdp->data_end - xdp->data_meta;
 
     if (xdp_md->ingress_ifindex)
         dev_put(xdp->rxq->dev);
 }
 
 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
               union bpf_attr __user *uattr)
 {
     bool do_live = (kattr->test.flags & BPF_F_TEST_XDP_LIVE_FRAMES);
     u32 tailroom = SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
     u32 batch_size = kattr->test.batch_size;
     u32 retval = 0, duration, max_data_sz;
     u32 size = kattr->test.data_size_in;
     u32 headroom = XDP_PACKET_HEADROOM;
     u32 repeat = kattr->test.repeat;
     struct netdev_rx_queue *rxqueue;
     struct skb_shared_info *sinfo;
     struct xdp_buff xdp = {};
     int i, ret = -EINVAL;
     struct xdp_md *ctx;
     void *data;
 
     if (prog->expected_attach_type == BPF_XDP_DEVMAP ||
         prog->expected_attach_type == BPF_XDP_CPUMAP)
         return -EINVAL;
 
     if (kattr->test.flags & ~BPF_F_TEST_XDP_LIVE_FRAMES)
         return -EINVAL;
 
     if (do_live) {
         if (!batch_size)
             batch_size = NAPI_POLL_WEIGHT;
         else if (batch_size > TEST_XDP_MAX_BATCH)
             return -E2BIG;
 
         headroom += sizeof(struct xdp_page_head);
     } else if (batch_size) {
         return -EINVAL;
     }
 
     ctx = bpf_ctx_init(kattr, sizeof(struct xdp_md));
     if (IS_ERR(ctx))
         return PTR_ERR(ctx);
 
     if (ctx) {
         /* There can't be user provided data before the meta data */
         if (ctx->data_meta || ctx->data_end != size ||
             ctx->data > ctx->data_end ||
             unlikely(xdp_metalen_invalid(ctx->data)) ||
             (do_live && (kattr->test.data_out || kattr->test.ctx_out)))
             goto free_ctx;
         /* Meta data is allocated from the headroom */
         headroom -= ctx->data;
     }
 
     max_data_sz = 4096 - headroom - tailroom;
     if (size > max_data_sz) {
         /* disallow live data mode for jumbo frames */
         if (do_live)
             goto free_ctx;
         size = max_data_sz;
     }
 
     data = bpf_test_init(kattr, size, max_data_sz, headroom, tailroom);
     if (IS_ERR(data)) {
         ret = PTR_ERR(data);
         goto free_ctx;
     }
 
     rxqueue = __netif_get_rx_queue(current->nsproxy->net_ns->loopback_dev, 0);
     rxqueue->xdp_rxq.frag_size = headroom + max_data_sz + tailroom;
     xdp_init_buff(&xdp, rxqueue->xdp_rxq.frag_size, &rxqueue->xdp_rxq);
     xdp_prepare_buff(&xdp, data, headroom, size, true);
     sinfo = xdp_get_shared_info_from_buff(&xdp);
 
     ret = xdp_convert_md_to_buff(ctx, &xdp);
     if (ret)
         goto free_data;
 
     if (unlikely(kattr->test.data_size_in > size)) {
         void __user *data_in = u64_to_user_ptr(kattr->test.data_in);
 
         while (size < kattr->test.data_size_in) {
             struct page *page;
             skb_frag_t *frag;
             u32 data_len;
 
             if (sinfo->nr_frags == MAX_SKB_FRAGS) {
                 ret = -ENOMEM;
                 goto out;
             }
 
             page = alloc_page(GFP_KERNEL);
             if (!page) {
                 ret = -ENOMEM;
                 goto out;
             }
 
             frag = &sinfo->frags[sinfo->nr_frags++];
             __skb_frag_set_page(frag, page);
 
             data_len = min_t(u32, kattr->test.data_size_in - size,
                      PAGE_SIZE);
             skb_frag_size_set(frag, data_len);
 
             if (copy_from_user(page_address(page), data_in + size,
                        data_len)) {
                 ret = -EFAULT;
                 goto out;
             }
             sinfo->xdp_frags_size += data_len;
             size += data_len;
         }
         xdp_buff_set_frags_flag(&xdp);
     }
 
     if (repeat > 1)
         bpf_prog_change_xdp(NULL, prog);
 
     if (do_live)
         ret = bpf_test_run_xdp_live(prog, &xdp, repeat, batch_size, &duration);
     else
         ret = bpf_test_run(prog, &xdp, repeat, &retval, &duration, true);
     /* We convert the xdp_buff back to an xdp_md before checking the return
      * code so the reference count of any held netdevice will be decremented
      * even if the test run failed.
      */
     xdp_convert_buff_to_md(&xdp, ctx);
     if (ret)
         goto out;
 
     size = xdp.data_end - xdp.data_meta + sinfo->xdp_frags_size;
     ret = bpf_test_finish(kattr, uattr, xdp.data_meta, sinfo, size,
                   retval, duration);
     if (!ret)
         ret = bpf_ctx_finish(kattr, uattr, ctx,
                      sizeof(struct xdp_md));
 
 out:
     if (repeat > 1)
         bpf_prog_change_xdp(prog, NULL);
 free_data:
     for (i = 0; i < sinfo->nr_frags; i++)
         __free_page(skb_frag_page(&sinfo->frags[i]));
     kfree(data);
 free_ctx:
     kfree(ctx);
     return ret;
 }
 
 static int verify_user_bpf_flow_keys(struct bpf_flow_keys *ctx)
 {
     /* make sure the fields we don't use are zeroed */
     if (!range_is_zero(ctx, 0, offsetof(struct bpf_flow_keys, flags)))
         return -EINVAL;
 
     /* flags is allowed */
 
     if (!range_is_zero(ctx, offsetofend(struct bpf_flow_keys, flags),
                sizeof(struct bpf_flow_keys)))
         return -EINVAL;
 
     return 0;
 }
 
 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
                      const union bpf_attr *kattr,
                      union bpf_attr __user *uattr)
 {
     struct bpf_test_timer t = { NO_PREEMPT };
     u32 size = kattr->test.data_size_in;
     struct bpf_flow_dissector ctx = {};
     u32 repeat = kattr->test.repeat;
     struct bpf_flow_keys *user_ctx;
     struct bpf_flow_keys flow_keys;
     const struct ethhdr *eth;
     unsigned int flags = 0;
     u32 retval, duration;
     void *data;
     int ret;
 
     if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size)
         return -EINVAL;
 
     if (size < ETH_HLEN)
         return -EINVAL;
 
     data = bpf_test_init(kattr, kattr->test.data_size_in, size, 0, 0);
     if (IS_ERR(data))
         return PTR_ERR(data);
 
     eth = (struct ethhdr *)data;
 
     if (!repeat)
         repeat = 1;
 
     user_ctx = bpf_ctx_init(kattr, sizeof(struct bpf_flow_keys));
     if (IS_ERR(user_ctx)) {
         kfree(data);
         return PTR_ERR(user_ctx);
     }
     if (user_ctx) {
         ret = verify_user_bpf_flow_keys(user_ctx);
         if (ret)
             goto out;
         flags = user_ctx->flags;
     }
 
     ctx.flow_keys = &flow_keys;
     ctx.data = data;
     ctx.data_end = (__u8 *)data + size;
 
     bpf_test_timer_enter(&t);
     do {
         retval = bpf_flow_dissect(prog, &ctx, eth->h_proto, ETH_HLEN,
                       size, flags);
     } while (bpf_test_timer_continue(&t, 1, repeat, &ret, &duration));
     bpf_test_timer_leave(&t);
 
     if (ret < 0)
         goto out;
 
     ret = bpf_test_finish(kattr, uattr, &flow_keys, NULL,
                   sizeof(flow_keys), retval, duration);
     if (!ret)
         ret = bpf_ctx_finish(kattr, uattr, user_ctx,
                      sizeof(struct bpf_flow_keys));
 
 out:
     kfree(user_ctx);
     kfree(data);
     return ret;
 }
 
 int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, const union bpf_attr *kattr,
                 union bpf_attr __user *uattr)
 {
     struct bpf_test_timer t = { NO_PREEMPT };
     struct bpf_prog_array *progs = NULL;
     struct bpf_sk_lookup_kern ctx = {};
     u32 repeat = kattr->test.repeat;
     struct bpf_sk_lookup *user_ctx;
     u32 retval, duration;
     int ret = -EINVAL;
 
     if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size)
         return -EINVAL;
 
     if (kattr->test.data_in || kattr->test.data_size_in || kattr->test.data_out ||
         kattr->test.data_size_out)
         return -EINVAL;
 
     if (!repeat)
         repeat = 1;
 
     user_ctx = bpf_ctx_init(kattr, sizeof(*user_ctx));
     if (IS_ERR(user_ctx))
         return PTR_ERR(user_ctx);
 
     if (!user_ctx)
         return -EINVAL;
 
     if (user_ctx->sk)
         goto out;
 
     if (!range_is_zero(user_ctx, offsetofend(typeof(*user_ctx), local_port), sizeof(*user_ctx)))
         goto out;
 
     if (user_ctx->local_port > U16_MAX) {
         ret = -ERANGE;
         goto out;
     }
 
     ctx.family = (u16)user_ctx->family;
     ctx.protocol = (u16)user_ctx->protocol;
     ctx.dport = (u16)user_ctx->local_port;
     ctx.sport = user_ctx->remote_port;
 
     switch (ctx.family) {
     case AF_INET:
         ctx.v4.daddr = (__force __be32)user_ctx->local_ip4;
         ctx.v4.saddr = (__force __be32)user_ctx->remote_ip4;
         break;
 
 #if IS_ENABLED(CONFIG_IPV6)
     case AF_INET6:
         ctx.v6.daddr = (struct in6_addr *)user_ctx->local_ip6;
         ctx.v6.saddr = (struct in6_addr *)user_ctx->remote_ip6;
         break;
 #endif
 
     default:
         ret = -EAFNOSUPPORT;
         goto out;
     }
 
     progs = bpf_prog_array_alloc(1, GFP_KERNEL);
     if (!progs) {
         ret = -ENOMEM;
         goto out;
     }
 
     progs->items[0].prog = prog;
 
     bpf_test_timer_enter(&t);
     do {
         ctx.selected_sk = NULL;
         retval = BPF_PROG_SK_LOOKUP_RUN_ARRAY(progs, ctx, bpf_prog_run);
     } while (bpf_test_timer_continue(&t, 1, repeat, &ret, &duration));
     bpf_test_timer_leave(&t);
 
     if (ret < 0)
         goto out;
 
     user_ctx->cookie = 0;
     if (ctx.selected_sk) {
         if (ctx.selected_sk->sk_reuseport && !ctx.no_reuseport) {
             ret = -EOPNOTSUPP;
             goto out;
         }
 
         user_ctx->cookie = sock_gen_cookie(ctx.selected_sk);
     }
 
     ret = bpf_test_finish(kattr, uattr, NULL, NULL, 0, retval, duration);
     if (!ret)
         ret = bpf_ctx_finish(kattr, uattr, user_ctx, sizeof(*user_ctx));
 
 out:
     bpf_prog_array_free(progs);
     kfree(user_ctx);
     return ret;
 }
 
 int bpf_prog_test_run_syscall(struct bpf_prog *prog,
                   const union bpf_attr *kattr,
                   union bpf_attr __user *uattr)
 {
     void __user *ctx_in = u64_to_user_ptr(kattr->test.ctx_in);
     __u32 ctx_size_in = kattr->test.ctx_size_in;
     void *ctx = NULL;
     u32 retval;
     int err = 0;
 
     /* doesn't support data_in/out, ctx_out, duration, or repeat or flags */
     if (kattr->test.data_in || kattr->test.data_out ||
         kattr->test.ctx_out || kattr->test.duration ||
         kattr->test.repeat || kattr->test.flags ||
         kattr->test.batch_size)
         return -EINVAL;
 
     if (ctx_size_in < prog->aux->max_ctx_offset ||
         ctx_size_in > U16_MAX)
         return -EINVAL;
 
     if (ctx_size_in) {
         ctx = memdup_user(ctx_in, ctx_size_in);
         if (IS_ERR(ctx))
             return PTR_ERR(ctx);
     }
 
     rcu_read_lock_trace();
     retval = bpf_prog_run_pin_on_cpu(prog, ctx);
     rcu_read_unlock_trace();
 
     if (copy_to_user(&uattr->test.retval, &retval, sizeof(u32))) {
         err = -EFAULT;
         goto out;
     }
     if (ctx_size_in)
         if (copy_to_user(ctx_in, ctx, ctx_size_in))
             err = -EFAULT;
 out:
     kfree(ctx);
     return err;
 }
 
 static const struct btf_kfunc_id_set bpf_prog_test_kfunc_set = {
     .owner = THIS_MODULE,
     .set   = &test_sk_check_kfunc_ids,
 };
 
 BTF_ID_LIST(bpf_prog_test_dtor_kfunc_ids)
 BTF_ID(struct, prog_test_ref_kfunc)
 BTF_ID(func, bpf_kfunc_call_test_release)
 BTF_ID(struct, prog_test_member)
 BTF_ID(func, bpf_kfunc_call_memb_release)
 
 static int __init bpf_prog_test_run_init(void)
 {
     const struct btf_id_dtor_kfunc bpf_prog_test_dtor_kfunc[] = {
         {
           .btf_id       = bpf_prog_test_dtor_kfunc_ids[0],
           .kfunc_btf_id = bpf_prog_test_dtor_kfunc_ids[1]
         },
         {
           .btf_id   = bpf_prog_test_dtor_kfunc_ids[2],
           .kfunc_btf_id = bpf_prog_test_dtor_kfunc_ids[3],
         },
     };
     int ret;
 
     ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &bpf_prog_test_kfunc_set);
     ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &bpf_prog_test_kfunc_set);
     return ret ?: register_btf_id_dtor_kfuncs(bpf_prog_test_dtor_kfunc,
                           ARRAY_SIZE(bpf_prog_test_dtor_kfunc),
                           THIS_MODULE);
 }
 late_initcall(bpf_prog_test_run_init);

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