Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 1 | /* eBPF example program: |
| 2 | * |
| 3 | * - Creates arraymap in kernel with 4 bytes keys and 8 byte values |
| 4 | * |
| 5 | * - Loads eBPF program |
| 6 | * |
| 7 | * The eBPF program accesses the map passed in to store two pieces of |
| 8 | * information. The number of invocations of the program, which maps |
| 9 | * to the number of packets received, is stored to key 0. Key 1 is |
| 10 | * incremented on each iteration by the number of bytes stored in |
| 11 | * the skb. |
| 12 | * |
| 13 | * - Attaches the new program to a cgroup using BPF_PROG_ATTACH |
| 14 | * |
| 15 | * - Every second, reads map[0] and map[1] to see how many bytes and |
| 16 | * packets were seen on any socket of tasks in the given cgroup. |
| 17 | */ |
| 18 | |
| 19 | #define _GNU_SOURCE |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <assert.h> |
| 24 | #include <unistd.h> |
| 25 | |
| 26 | #include <linux/bpf.h> |
| 27 | |
| 28 | #include "libbpf.h" |
| 29 | #include "cgroup_helpers.h" |
| 30 | |
| 31 | #define FOO "/foo" |
| 32 | #define BAR "/foo/bar/" |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 33 | #define PING_CMD "ping -c1 -w1 127.0.0.1 > /dev/null" |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 34 | |
Joe Stringer | d40fc18 | 2016-12-14 14:43:38 -0800 | [diff] [blame] | 35 | char bpf_log_buf[BPF_LOG_BUF_SIZE]; |
| 36 | |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 37 | static int prog_load(int verdict) |
| 38 | { |
| 39 | int ret; |
| 40 | struct bpf_insn prog[] = { |
| 41 | BPF_MOV64_IMM(BPF_REG_0, verdict), /* r0 = verdict */ |
| 42 | BPF_EXIT_INSN(), |
| 43 | }; |
Joe Stringer | 43371c8 | 2016-12-14 14:43:39 -0800 | [diff] [blame] | 44 | size_t insns_cnt = sizeof(prog) / sizeof(struct bpf_insn); |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 45 | |
Joe Stringer | d40fc18 | 2016-12-14 14:43:38 -0800 | [diff] [blame] | 46 | ret = bpf_load_program(BPF_PROG_TYPE_CGROUP_SKB, |
Joe Stringer | 43371c8 | 2016-12-14 14:43:39 -0800 | [diff] [blame] | 47 | prog, insns_cnt, "GPL", 0, |
Joe Stringer | d40fc18 | 2016-12-14 14:43:38 -0800 | [diff] [blame] | 48 | bpf_log_buf, BPF_LOG_BUF_SIZE); |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 49 | |
| 50 | if (ret < 0) { |
| 51 | log_err("Loading program"); |
| 52 | printf("Output from verifier:\n%s\n-------\n", bpf_log_buf); |
| 53 | return 0; |
| 54 | } |
| 55 | return ret; |
| 56 | } |
| 57 | |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 58 | static int test_foo_bar(void) |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 59 | { |
| 60 | int drop_prog, allow_prog, foo = 0, bar = 0, rc = 0; |
| 61 | |
| 62 | allow_prog = prog_load(1); |
| 63 | if (!allow_prog) |
| 64 | goto err; |
| 65 | |
| 66 | drop_prog = prog_load(0); |
| 67 | if (!drop_prog) |
| 68 | goto err; |
| 69 | |
| 70 | if (setup_cgroup_environment()) |
| 71 | goto err; |
| 72 | |
| 73 | /* Create cgroup /foo, get fd, and join it */ |
| 74 | foo = create_and_get_cgroup(FOO); |
| 75 | if (!foo) |
| 76 | goto err; |
| 77 | |
| 78 | if (join_cgroup(FOO)) |
| 79 | goto err; |
| 80 | |
David Ahern | 51de082 | 2017-11-30 09:02:29 -0800 | [diff] [blame] | 81 | if (bpf_prog_attach(drop_prog, foo, BPF_CGROUP_INET_EGRESS, |
| 82 | BPF_F_ALLOW_OVERRIDE)) { |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 83 | log_err("Attaching prog to /foo"); |
| 84 | goto err; |
| 85 | } |
| 86 | |
Alexei Starovoitov | 7f67763 | 2017-02-10 20:28:24 -0800 | [diff] [blame] | 87 | printf("Attached DROP prog. This ping in cgroup /foo should fail...\n"); |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 88 | assert(system(PING_CMD) != 0); |
| 89 | |
| 90 | /* Create cgroup /foo/bar, get fd, and join it */ |
| 91 | bar = create_and_get_cgroup(BAR); |
| 92 | if (!bar) |
| 93 | goto err; |
| 94 | |
| 95 | if (join_cgroup(BAR)) |
| 96 | goto err; |
| 97 | |
Alexei Starovoitov | 7f67763 | 2017-02-10 20:28:24 -0800 | [diff] [blame] | 98 | printf("Attached DROP prog. This ping in cgroup /foo/bar should fail...\n"); |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 99 | assert(system(PING_CMD) != 0); |
| 100 | |
David Ahern | 51de082 | 2017-11-30 09:02:29 -0800 | [diff] [blame] | 101 | if (bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS, |
| 102 | BPF_F_ALLOW_OVERRIDE)) { |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 103 | log_err("Attaching prog to /foo/bar"); |
| 104 | goto err; |
| 105 | } |
| 106 | |
Alexei Starovoitov | 7f67763 | 2017-02-10 20:28:24 -0800 | [diff] [blame] | 107 | printf("Attached PASS prog. This ping in cgroup /foo/bar should pass...\n"); |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 108 | assert(system(PING_CMD) == 0); |
| 109 | |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 110 | if (bpf_prog_detach(bar, BPF_CGROUP_INET_EGRESS)) { |
| 111 | log_err("Detaching program from /foo/bar"); |
| 112 | goto err; |
| 113 | } |
| 114 | |
Alexei Starovoitov | 7f67763 | 2017-02-10 20:28:24 -0800 | [diff] [blame] | 115 | printf("Detached PASS from /foo/bar while DROP is attached to /foo.\n" |
| 116 | "This ping in cgroup /foo/bar should fail...\n"); |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 117 | assert(system(PING_CMD) != 0); |
| 118 | |
David Ahern | 51de082 | 2017-11-30 09:02:29 -0800 | [diff] [blame] | 119 | if (bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS, |
| 120 | BPF_F_ALLOW_OVERRIDE)) { |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 121 | log_err("Attaching prog to /foo/bar"); |
| 122 | goto err; |
| 123 | } |
| 124 | |
| 125 | if (bpf_prog_detach(foo, BPF_CGROUP_INET_EGRESS)) { |
| 126 | log_err("Detaching program from /foo"); |
| 127 | goto err; |
| 128 | } |
| 129 | |
Alexei Starovoitov | 7f67763 | 2017-02-10 20:28:24 -0800 | [diff] [blame] | 130 | printf("Attached PASS from /foo/bar and detached DROP from /foo.\n" |
| 131 | "This ping in cgroup /foo/bar should pass...\n"); |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 132 | assert(system(PING_CMD) == 0); |
| 133 | |
David Ahern | 51de082 | 2017-11-30 09:02:29 -0800 | [diff] [blame] | 134 | if (bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS, |
| 135 | BPF_F_ALLOW_OVERRIDE)) { |
Alexei Starovoitov | 7f67763 | 2017-02-10 20:28:24 -0800 | [diff] [blame] | 136 | log_err("Attaching prog to /foo/bar"); |
| 137 | goto err; |
| 138 | } |
| 139 | |
| 140 | if (!bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS, 0)) { |
| 141 | errno = 0; |
| 142 | log_err("Unexpected success attaching prog to /foo/bar"); |
| 143 | goto err; |
| 144 | } |
| 145 | |
| 146 | if (bpf_prog_detach(bar, BPF_CGROUP_INET_EGRESS)) { |
| 147 | log_err("Detaching program from /foo/bar"); |
| 148 | goto err; |
| 149 | } |
| 150 | |
| 151 | if (!bpf_prog_detach(foo, BPF_CGROUP_INET_EGRESS)) { |
| 152 | errno = 0; |
| 153 | log_err("Unexpected success in double detach from /foo"); |
| 154 | goto err; |
| 155 | } |
| 156 | |
| 157 | if (bpf_prog_attach(allow_prog, foo, BPF_CGROUP_INET_EGRESS, 0)) { |
| 158 | log_err("Attaching non-overridable prog to /foo"); |
| 159 | goto err; |
| 160 | } |
| 161 | |
| 162 | if (!bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS, 0)) { |
| 163 | errno = 0; |
| 164 | log_err("Unexpected success attaching non-overridable prog to /foo/bar"); |
| 165 | goto err; |
| 166 | } |
| 167 | |
David Ahern | 51de082 | 2017-11-30 09:02:29 -0800 | [diff] [blame] | 168 | if (!bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS, |
| 169 | BPF_F_ALLOW_OVERRIDE)) { |
Alexei Starovoitov | 7f67763 | 2017-02-10 20:28:24 -0800 | [diff] [blame] | 170 | errno = 0; |
| 171 | log_err("Unexpected success attaching overridable prog to /foo/bar"); |
| 172 | goto err; |
| 173 | } |
| 174 | |
David Ahern | 51de082 | 2017-11-30 09:02:29 -0800 | [diff] [blame] | 175 | if (!bpf_prog_attach(allow_prog, foo, BPF_CGROUP_INET_EGRESS, |
| 176 | BPF_F_ALLOW_OVERRIDE)) { |
Alexei Starovoitov | 7f67763 | 2017-02-10 20:28:24 -0800 | [diff] [blame] | 177 | errno = 0; |
| 178 | log_err("Unexpected success attaching overridable prog to /foo"); |
| 179 | goto err; |
| 180 | } |
| 181 | |
| 182 | if (bpf_prog_attach(drop_prog, foo, BPF_CGROUP_INET_EGRESS, 0)) { |
| 183 | log_err("Attaching different non-overridable prog to /foo"); |
| 184 | goto err; |
| 185 | } |
| 186 | |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 187 | goto out; |
| 188 | |
| 189 | err: |
| 190 | rc = 1; |
| 191 | |
| 192 | out: |
| 193 | close(foo); |
| 194 | close(bar); |
| 195 | cleanup_cgroup_environment(); |
Alexei Starovoitov | 7f67763 | 2017-02-10 20:28:24 -0800 | [diff] [blame] | 196 | if (!rc) |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 197 | printf("### override:PASS\n"); |
Alexei Starovoitov | 7f67763 | 2017-02-10 20:28:24 -0800 | [diff] [blame] | 198 | else |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 199 | printf("### override:FAIL\n"); |
Sargun Dhillon | 9b474ec | 2016-12-02 02:42:32 -0800 | [diff] [blame] | 200 | return rc; |
| 201 | } |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 202 | |
| 203 | static int map_fd = -1; |
| 204 | |
| 205 | static int prog_load_cnt(int verdict, int val) |
| 206 | { |
| 207 | if (map_fd < 0) |
| 208 | map_fd = bpf_create_map(BPF_MAP_TYPE_ARRAY, 4, 8, 1, 0); |
| 209 | if (map_fd < 0) { |
| 210 | printf("failed to create map '%s'\n", strerror(errno)); |
| 211 | return -1; |
| 212 | } |
| 213 | |
| 214 | struct bpf_insn prog[] = { |
| 215 | BPF_MOV32_IMM(BPF_REG_0, 0), |
| 216 | BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_0, -4), /* *(u32 *)(fp - 4) = r0 */ |
| 217 | BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), |
| 218 | BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4), /* r2 = fp - 4 */ |
| 219 | BPF_LD_MAP_FD(BPF_REG_1, map_fd), |
| 220 | BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem), |
| 221 | BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2), |
| 222 | BPF_MOV64_IMM(BPF_REG_1, val), /* r1 = 1 */ |
| 223 | BPF_RAW_INSN(BPF_STX | BPF_XADD | BPF_DW, BPF_REG_0, BPF_REG_1, 0, 0), /* xadd r0 += r1 */ |
| 224 | BPF_MOV64_IMM(BPF_REG_0, verdict), /* r0 = verdict */ |
| 225 | BPF_EXIT_INSN(), |
| 226 | }; |
| 227 | size_t insns_cnt = sizeof(prog) / sizeof(struct bpf_insn); |
| 228 | int ret; |
| 229 | |
| 230 | ret = bpf_load_program(BPF_PROG_TYPE_CGROUP_SKB, |
| 231 | prog, insns_cnt, "GPL", 0, |
| 232 | bpf_log_buf, BPF_LOG_BUF_SIZE); |
| 233 | |
| 234 | if (ret < 0) { |
| 235 | log_err("Loading program"); |
| 236 | printf("Output from verifier:\n%s\n-------\n", bpf_log_buf); |
| 237 | return 0; |
| 238 | } |
| 239 | return ret; |
| 240 | } |
| 241 | |
| 242 | |
| 243 | static int test_multiprog(void) |
| 244 | { |
Alexei Starovoitov | dfc0699 | 2017-10-02 22:50:28 -0700 | [diff] [blame] | 245 | __u32 prog_ids[4], prog_cnt = 0, attach_flags, saved_prog_id; |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 246 | int cg1 = 0, cg2 = 0, cg3 = 0, cg4 = 0, cg5 = 0, key = 0; |
| 247 | int drop_prog, allow_prog[6] = {}, rc = 0; |
| 248 | unsigned long long value; |
| 249 | int i = 0; |
| 250 | |
| 251 | for (i = 0; i < 6; i++) { |
| 252 | allow_prog[i] = prog_load_cnt(1, 1 << i); |
| 253 | if (!allow_prog[i]) |
| 254 | goto err; |
| 255 | } |
| 256 | drop_prog = prog_load_cnt(0, 1); |
| 257 | if (!drop_prog) |
| 258 | goto err; |
| 259 | |
| 260 | if (setup_cgroup_environment()) |
| 261 | goto err; |
| 262 | |
| 263 | cg1 = create_and_get_cgroup("/cg1"); |
| 264 | if (!cg1) |
| 265 | goto err; |
| 266 | cg2 = create_and_get_cgroup("/cg1/cg2"); |
| 267 | if (!cg2) |
| 268 | goto err; |
| 269 | cg3 = create_and_get_cgroup("/cg1/cg2/cg3"); |
| 270 | if (!cg3) |
| 271 | goto err; |
| 272 | cg4 = create_and_get_cgroup("/cg1/cg2/cg3/cg4"); |
| 273 | if (!cg4) |
| 274 | goto err; |
| 275 | cg5 = create_and_get_cgroup("/cg1/cg2/cg3/cg4/cg5"); |
| 276 | if (!cg5) |
| 277 | goto err; |
| 278 | |
| 279 | if (join_cgroup("/cg1/cg2/cg3/cg4/cg5")) |
| 280 | goto err; |
| 281 | |
David Ahern | 51de082 | 2017-11-30 09:02:29 -0800 | [diff] [blame] | 282 | if (bpf_prog_attach(allow_prog[0], cg1, BPF_CGROUP_INET_EGRESS, |
| 283 | BPF_F_ALLOW_MULTI)) { |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 284 | log_err("Attaching prog to cg1"); |
| 285 | goto err; |
| 286 | } |
David Ahern | 51de082 | 2017-11-30 09:02:29 -0800 | [diff] [blame] | 287 | if (!bpf_prog_attach(allow_prog[0], cg1, BPF_CGROUP_INET_EGRESS, |
| 288 | BPF_F_ALLOW_MULTI)) { |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 289 | log_err("Unexpected success attaching the same prog to cg1"); |
| 290 | goto err; |
| 291 | } |
David Ahern | 51de082 | 2017-11-30 09:02:29 -0800 | [diff] [blame] | 292 | if (bpf_prog_attach(allow_prog[1], cg1, BPF_CGROUP_INET_EGRESS, |
| 293 | BPF_F_ALLOW_MULTI)) { |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 294 | log_err("Attaching prog2 to cg1"); |
| 295 | goto err; |
| 296 | } |
David Ahern | 51de082 | 2017-11-30 09:02:29 -0800 | [diff] [blame] | 297 | if (bpf_prog_attach(allow_prog[2], cg2, BPF_CGROUP_INET_EGRESS, |
| 298 | BPF_F_ALLOW_OVERRIDE)) { |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 299 | log_err("Attaching prog to cg2"); |
| 300 | goto err; |
| 301 | } |
David Ahern | 51de082 | 2017-11-30 09:02:29 -0800 | [diff] [blame] | 302 | if (bpf_prog_attach(allow_prog[3], cg3, BPF_CGROUP_INET_EGRESS, |
| 303 | BPF_F_ALLOW_MULTI)) { |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 304 | log_err("Attaching prog to cg3"); |
| 305 | goto err; |
| 306 | } |
David Ahern | 51de082 | 2017-11-30 09:02:29 -0800 | [diff] [blame] | 307 | if (bpf_prog_attach(allow_prog[4], cg4, BPF_CGROUP_INET_EGRESS, |
| 308 | BPF_F_ALLOW_OVERRIDE)) { |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 309 | log_err("Attaching prog to cg4"); |
| 310 | goto err; |
| 311 | } |
| 312 | if (bpf_prog_attach(allow_prog[5], cg5, BPF_CGROUP_INET_EGRESS, 0)) { |
| 313 | log_err("Attaching prog to cg5"); |
| 314 | goto err; |
| 315 | } |
| 316 | assert(system(PING_CMD) == 0); |
| 317 | assert(bpf_map_lookup_elem(map_fd, &key, &value) == 0); |
| 318 | assert(value == 1 + 2 + 8 + 32); |
| 319 | |
Alexei Starovoitov | dfc0699 | 2017-10-02 22:50:28 -0700 | [diff] [blame] | 320 | /* query the number of effective progs in cg5 */ |
| 321 | assert(bpf_prog_query(cg5, BPF_CGROUP_INET_EGRESS, BPF_F_QUERY_EFFECTIVE, |
| 322 | NULL, NULL, &prog_cnt) == 0); |
| 323 | assert(prog_cnt == 4); |
| 324 | /* retrieve prog_ids of effective progs in cg5 */ |
| 325 | assert(bpf_prog_query(cg5, BPF_CGROUP_INET_EGRESS, BPF_F_QUERY_EFFECTIVE, |
| 326 | &attach_flags, prog_ids, &prog_cnt) == 0); |
| 327 | assert(prog_cnt == 4); |
| 328 | assert(attach_flags == 0); |
| 329 | saved_prog_id = prog_ids[0]; |
| 330 | /* check enospc handling */ |
| 331 | prog_ids[0] = 0; |
| 332 | prog_cnt = 2; |
| 333 | assert(bpf_prog_query(cg5, BPF_CGROUP_INET_EGRESS, BPF_F_QUERY_EFFECTIVE, |
| 334 | &attach_flags, prog_ids, &prog_cnt) == -1 && |
| 335 | errno == ENOSPC); |
| 336 | assert(prog_cnt == 4); |
| 337 | /* check that prog_ids are returned even when buffer is too small */ |
| 338 | assert(prog_ids[0] == saved_prog_id); |
| 339 | /* retrieve prog_id of single attached prog in cg5 */ |
| 340 | prog_ids[0] = 0; |
| 341 | assert(bpf_prog_query(cg5, BPF_CGROUP_INET_EGRESS, 0, |
| 342 | NULL, prog_ids, &prog_cnt) == 0); |
| 343 | assert(prog_cnt == 1); |
| 344 | assert(prog_ids[0] == saved_prog_id); |
| 345 | |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 346 | /* detach bottom program and ping again */ |
| 347 | if (bpf_prog_detach2(-1, cg5, BPF_CGROUP_INET_EGRESS)) { |
| 348 | log_err("Detaching prog from cg5"); |
| 349 | goto err; |
| 350 | } |
| 351 | value = 0; |
| 352 | assert(bpf_map_update_elem(map_fd, &key, &value, 0) == 0); |
| 353 | assert(system(PING_CMD) == 0); |
| 354 | assert(bpf_map_lookup_elem(map_fd, &key, &value) == 0); |
| 355 | assert(value == 1 + 2 + 8 + 16); |
| 356 | |
| 357 | /* detach 3rd from bottom program and ping again */ |
| 358 | errno = 0; |
| 359 | if (!bpf_prog_detach2(0, cg3, BPF_CGROUP_INET_EGRESS)) { |
| 360 | log_err("Unexpected success on detach from cg3"); |
| 361 | goto err; |
| 362 | } |
| 363 | if (bpf_prog_detach2(allow_prog[3], cg3, BPF_CGROUP_INET_EGRESS)) { |
| 364 | log_err("Detaching from cg3"); |
| 365 | goto err; |
| 366 | } |
| 367 | value = 0; |
| 368 | assert(bpf_map_update_elem(map_fd, &key, &value, 0) == 0); |
| 369 | assert(system(PING_CMD) == 0); |
| 370 | assert(bpf_map_lookup_elem(map_fd, &key, &value) == 0); |
| 371 | assert(value == 1 + 2 + 16); |
| 372 | |
| 373 | /* detach 2nd from bottom program and ping again */ |
| 374 | if (bpf_prog_detach2(-1, cg4, BPF_CGROUP_INET_EGRESS)) { |
| 375 | log_err("Detaching prog from cg4"); |
| 376 | goto err; |
| 377 | } |
| 378 | value = 0; |
| 379 | assert(bpf_map_update_elem(map_fd, &key, &value, 0) == 0); |
| 380 | assert(system(PING_CMD) == 0); |
| 381 | assert(bpf_map_lookup_elem(map_fd, &key, &value) == 0); |
| 382 | assert(value == 1 + 2 + 4); |
Alexei Starovoitov | dfc0699 | 2017-10-02 22:50:28 -0700 | [diff] [blame] | 383 | |
| 384 | prog_cnt = 4; |
| 385 | assert(bpf_prog_query(cg5, BPF_CGROUP_INET_EGRESS, BPF_F_QUERY_EFFECTIVE, |
| 386 | &attach_flags, prog_ids, &prog_cnt) == 0); |
| 387 | assert(prog_cnt == 3); |
| 388 | assert(attach_flags == 0); |
| 389 | assert(bpf_prog_query(cg5, BPF_CGROUP_INET_EGRESS, 0, |
| 390 | NULL, prog_ids, &prog_cnt) == 0); |
| 391 | assert(prog_cnt == 0); |
Alexei Starovoitov | 39323e7 | 2017-10-02 22:50:25 -0700 | [diff] [blame] | 392 | goto out; |
| 393 | err: |
| 394 | rc = 1; |
| 395 | |
| 396 | out: |
| 397 | for (i = 0; i < 6; i++) |
| 398 | if (allow_prog[i] > 0) |
| 399 | close(allow_prog[i]); |
| 400 | close(cg1); |
| 401 | close(cg2); |
| 402 | close(cg3); |
| 403 | close(cg4); |
| 404 | close(cg5); |
| 405 | cleanup_cgroup_environment(); |
| 406 | if (!rc) |
| 407 | printf("### multi:PASS\n"); |
| 408 | else |
| 409 | printf("### multi:FAIL\n"); |
| 410 | return rc; |
| 411 | } |
| 412 | |
| 413 | int main(int argc, char **argv) |
| 414 | { |
| 415 | int rc = 0; |
| 416 | |
| 417 | rc = test_foo_bar(); |
| 418 | if (rc) |
| 419 | return rc; |
| 420 | |
| 421 | return test_multiprog(); |
| 422 | } |