selftests/bpf: Test global bpf_rb_root arrays and fields in nested struct types.

Make sure global arrays of bpf_rb_root and fields of bpf_rb_root in nested
struct types work correctly.

Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
Link: https://lore.kernel.org/r/20240523174202.461236-9-thinker.li@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/tools/testing/selftests/bpf/prog_tests/rbtree.c b/tools/testing/selftests/bpf/prog_tests/rbtree.c
index e9300c9..9818f06 100644 (file)
--- a/tools/testing/selftests/bpf/prog_tests/rbtree.c
+++ b/tools/testing/selftests/bpf/prog_tests/rbtree.c
@@ -31,6 +31,28 @@ static void test_rbtree_add_nodes(void)
        rbtree__destroy(skel);
 }
 
+static void test_rbtree_add_nodes_nested(void)
+{
+       LIBBPF_OPTS(bpf_test_run_opts, opts,
+                   .data_in = &pkt_v4,
+                   .data_size_in = sizeof(pkt_v4),
+                   .repeat = 1,
+       );
+       struct rbtree *skel;
+       int ret;
+
+       skel = rbtree__open_and_load();
+       if (!ASSERT_OK_PTR(skel, "rbtree__open_and_load"))
+               return;
+
+       ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.rbtree_add_nodes_nested), &opts);
+       ASSERT_OK(ret, "rbtree_add_nodes_nested run");
+       ASSERT_OK(opts.retval, "rbtree_add_nodes_nested retval");
+       ASSERT_EQ(skel->data->less_callback_ran, 1, "rbtree_add_nodes_nested less_callback_ran");
+
+       rbtree__destroy(skel);
+}
+
 static void test_rbtree_add_and_remove(void)
 {
        LIBBPF_OPTS(bpf_test_run_opts, opts,
@@ -53,6 +75,27 @@ static void test_rbtree_add_and_remove(void)
        rbtree__destroy(skel);
 }
 
+static void test_rbtree_add_and_remove_array(void)
+{
+       LIBBPF_OPTS(bpf_test_run_opts, opts,
+                   .data_in = &pkt_v4,
+                   .data_size_in = sizeof(pkt_v4),
+                   .repeat = 1,
+       );
+       struct rbtree *skel;
+       int ret;
+
+       skel = rbtree__open_and_load();
+       if (!ASSERT_OK_PTR(skel, "rbtree__open_and_load"))
+               return;
+
+       ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.rbtree_add_and_remove_array), &opts);
+       ASSERT_OK(ret, "rbtree_add_and_remove_array");
+       ASSERT_OK(opts.retval, "rbtree_add_and_remove_array retval");
+
+       rbtree__destroy(skel);
+}
+
 static void test_rbtree_first_and_remove(void)
 {
        LIBBPF_OPTS(bpf_test_run_opts, opts,
@@ -104,8 +147,12 @@ void test_rbtree_success(void)
 {
        if (test__start_subtest("rbtree_add_nodes"))
                test_rbtree_add_nodes();
+       if (test__start_subtest("rbtree_add_nodes_nested"))
+               test_rbtree_add_nodes_nested();
        if (test__start_subtest("rbtree_add_and_remove"))
                test_rbtree_add_and_remove();
+       if (test__start_subtest("rbtree_add_and_remove_array"))
+               test_rbtree_add_and_remove_array();
        if (test__start_subtest("rbtree_first_and_remove"))
                test_rbtree_first_and_remove();
        if (test__start_subtest("rbtree_api_release_aliasing"))

diff --git a/tools/testing/selftests/bpf/progs/rbtree.c b/tools/testing/selftests/bpf/progs/rbtree.c
index b09f4ff..a3620c1 100644 (file)
--- a/tools/testing/selftests/bpf/progs/rbtree.c
+++ b/tools/testing/selftests/bpf/progs/rbtree.c
@@ -13,6 +13,15 @@ struct node_data {
        struct bpf_rb_node node;
 };
 
+struct root_nested_inner {
+       struct bpf_spin_lock glock;
+       struct bpf_rb_root root __contains(node_data, node);
+};
+
+struct root_nested {
+       struct root_nested_inner inner;
+};
+
 long less_callback_ran = -1;
 long removed_key = -1;
 long first_data[2] = {-1, -1};
@@ -20,6 +29,9 @@ long first_data[2] = {-1, -1};
 #define private(name) SEC(".data." #name) __hidden __attribute__((aligned(8)))
 private(A) struct bpf_spin_lock glock;
 private(A) struct bpf_rb_root groot __contains(node_data, node);
+private(A) struct bpf_rb_root groot_array[2] __contains(node_data, node);
+private(A) struct bpf_rb_root groot_array_one[1] __contains(node_data, node);
+private(B) struct root_nested groot_nested;
 
 static bool less(struct bpf_rb_node *a, const struct bpf_rb_node *b)
 {
@@ -71,6 +83,12 @@ long rbtree_add_nodes(void *ctx)
        return __add_three(&groot, &glock);
 }
 
+SEC("tc")
+long rbtree_add_nodes_nested(void *ctx)
+{
+       return __add_three(&groot_nested.inner.root, &groot_nested.inner.glock);
+}
+
 SEC("tc")
 long rbtree_add_and_remove(void *ctx)
 {
@@ -109,6 +127,65 @@ err_out:
        return 1;
 }
 
+SEC("tc")
+long rbtree_add_and_remove_array(void *ctx)
+{
+       struct bpf_rb_node *res1 = NULL, *res2 = NULL, *res3 = NULL;
+       struct node_data *nodes[3][2] = {{NULL, NULL}, {NULL, NULL}, {NULL, NULL}};
+       struct node_data *n;
+       long k1 = -1, k2 = -1, k3 = -1;
+       int i, j;
+
+       for (i = 0; i < 3; i++) {
+               for (j = 0; j < 2; j++) {
+                       nodes[i][j] = bpf_obj_new(typeof(*nodes[i][j]));
+                       if (!nodes[i][j])
+                               goto err_out;
+                       nodes[i][j]->key = i * 2 + j;
+               }
+       }
+
+       bpf_spin_lock(&glock);
+       for (i = 0; i < 2; i++)
+               for (j = 0; j < 2; j++)
+                       bpf_rbtree_add(&groot_array[i], &nodes[i][j]->node, less);
+       for (j = 0; j < 2; j++)
+               bpf_rbtree_add(&groot_array_one[0], &nodes[2][j]->node, less);
+       res1 = bpf_rbtree_remove(&groot_array[0], &nodes[0][0]->node);
+       res2 = bpf_rbtree_remove(&groot_array[1], &nodes[1][0]->node);
+       res3 = bpf_rbtree_remove(&groot_array_one[0], &nodes[2][0]->node);
+       bpf_spin_unlock(&glock);
+
+       if (res1) {
+               n = container_of(res1, struct node_data, node);
+               k1 = n->key;
+               bpf_obj_drop(n);
+       }
+       if (res2) {
+               n = container_of(res2, struct node_data, node);
+               k2 = n->key;
+               bpf_obj_drop(n);
+       }
+       if (res3) {
+               n = container_of(res3, struct node_data, node);
+               k3 = n->key;
+               bpf_obj_drop(n);
+       }
+       if (k1 != 0 || k2 != 2 || k3 != 4)
+               return 2;
+
+       return 0;
+
+err_out:
+       for (i = 0; i < 3; i++) {
+               for (j = 0; j < 2; j++) {
+                       if (nodes[i][j])
+                               bpf_obj_drop(nodes[i][j]);
+               }
+       }
+       return 1;
+}
+
 SEC("tc")
 long rbtree_first_and_remove(void *ctx)
 {