1 #include "bpf_experimental.h"
2 #include "bpf_misc.h"
3
4 struct val_t {
5 long b, c, d;
6 };
7
8 struct val2_t {
9 long b;
10 };
11
12 struct val_with_ptr_t {
13 char *p;
14 };
15
16 struct val_with_rb_root_t {
17 struct bpf_spin_lock lock;
18 };
19
20 struct val_600b_t {
21 char b[600];
22 };
23
24 struct elem {
25 long sum;
26 struct val_t __percpu_kptr *pc;
27 };
28
29 struct {
30 __uint(type, BPF_MAP_TYPE_ARRAY);
31 __uint(max_entries, 1);
32 __type(key, int);
33 __type(value, struct elem);
34 } array SEC(".maps");
35
36 long ret;
37
38 SEC("?fentry/bpf_fentry_test1")
39 __failure __msg("store to referenced kptr disallowed")
40 int BPF_PROG(test_array_map_1)
41 {
42 struct val_t __percpu_kptr *p;
43 struct elem *e;
44 int index = 0;
45
46 e = bpf_map_lookup_elem(&array, &index);
47 if (!e)
48 return 0;
49
50 p = bpf_percpu_obj_new(struct val_t);
51 if (!p)
52 return 0;
53
54 p = bpf_kptr_xchg(&e->pc, p);
55 if (p)
56 bpf_percpu_obj_drop(p);
57
58 e->pc = (struct val_t __percpu_kptr *)ret;
59 return 0;
60 }
61
62 SEC("?fentry/bpf_fentry_test1")
63 __failure __msg("invalid kptr access, R2 type=percpu_ptr_val2_t expected=ptr_val_t")
64 int BPF_PROG(test_array_map_2)
65 {
66 struct val2_t __percpu_kptr *p2;
67 struct val_t __percpu_kptr *p;
68 struct elem *e;
69 int index = 0;
70
71 e = bpf_map_lookup_elem(&array, &index);
72 if (!e)
73 return 0;
74
75 p2 = bpf_percpu_obj_new(struct val2_t);
76 if (!p2)
77 return 0;
78
79 p = bpf_kptr_xchg(&e->pc, p2);
80 if (p)
81 bpf_percpu_obj_drop(p);
82
83 return 0;
84 }
85
86 SEC("?fentry.s/bpf_fentry_test1")
87 __failure __msg("R1 type=scalar expected=percpu_ptr_, percpu_rcu_ptr_, percpu_trusted_ptr_")
88 int BPF_PROG(test_array_map_3)
89 {
90 struct val_t __percpu_kptr *p, *p1;
91 struct val_t *v;
92 struct elem *e;
93 int index = 0;
94
95 e = bpf_map_lookup_elem(&array, &index);
96 if (!e)
97 return 0;
98
99 p = bpf_percpu_obj_new(struct val_t);
100 if (!p)
101 return 0;
102
103 p1 = bpf_kptr_xchg(&e->pc, p);
104 if (p1)
105 bpf_percpu_obj_drop(p1);
106
107 v = bpf_this_cpu_ptr(p);
108 ret = v->b;
109 return 0;
110 }
111
112 SEC("?fentry.s/bpf_fentry_test1")
113 __failure __msg("arg#0 expected for bpf_percpu_obj_drop_impl()")
114 int BPF_PROG(test_array_map_4)
115 {
116 struct val_t __percpu_kptr *p;
117
118 p = bpf_percpu_obj_new(struct val_t);
119 if (!p)
120 return 0;
121
122 bpf_obj_drop(p);
123 return 0;
124 }
125
126 SEC("?fentry.s/bpf_fentry_test1")
127 __failure __msg("arg#0 expected for bpf_obj_drop_impl()")
128 int BPF_PROG(test_array_map_5)
129 {
130 struct val_t *p;
131
132 p = bpf_obj_new(struct val_t);
133 if (!p)
134 return 0;
135
136 bpf_percpu_obj_drop(p);
137 return 0;
138 }
139
140 SEC("?fentry.s/bpf_fentry_test1")
141 __failure __msg("bpf_percpu_obj_new type ID argument must be of a struct of scalars")
142 int BPF_PROG(test_array_map_6)
143 {
144 struct val_with_ptr_t __percpu_kptr *p;
145
146 p = bpf_percpu_obj_new(struct val_with_ptr_t);
147 if (!p)
148 return 0;
149
150 bpf_percpu_obj_drop(p);
151 return 0;
152 }
153
154 SEC("?fentry.s/bpf_fentry_test1")
155 __failure __msg("bpf_percpu_obj_new type ID argument must not contain special fields")
156 int BPF_PROG(test_array_map_7)
157 {
158 struct val_with_rb_root_t __percpu_kptr *p;
159
160 p = bpf_percpu_obj_new(struct val_with_rb_root_t);
161 if (!p)
162 return 0;
163
164 bpf_percpu_obj_drop(p);
165 return 0;
166 }
167
168 SEC("?fentry.s/bpf_fentry_test1")
169 __failure __msg("bpf_percpu_obj_new type size (600) is greater than 512")
170 int BPF_PROG(test_array_map_8)
171 {
172 struct val_600b_t __percpu_kptr *p;
173
174 p = bpf_percpu_obj_new(struct val_600b_t);
175 if (!p)
176 return 0;
177
178 bpf_percpu_obj_drop(p);
179 return 0;
180 }
181
182 char _license[] SEC("license") = "GPL";
183
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