Add a selftest that calls a global function with a context object parameter from an freplace function to check that the program context type is correctly converted to the freplace target when fetching the context type from the kernel BTF. v2: - Trim includes - Get rid of global function - Use __noinline
Unified · Split
| @@ -395,6 +395,18 @@ static void test_func_map_prog_compatibility(void) · 394 unmodified lines | ||
| 395 | 395 | "./test_attach_probe.o"); |
| 396 | 396 | } |
| 397 | 397 | |
| 398 | +static void test_func_replace_global_func(void) | |
| 399 | +{ | |
| 400 | + const char *prog_name[] = { | |
| 401 | + "freplace/test_pkt_access", | |
| 402 | + }; | |
| 403 | + | |
| 404 | + test_fexit_bpf2bpf_common("./freplace_global_func.o", | |
| 405 | + "./test_pkt_access.o", | |
| 406 | + ARRAY_SIZE(prog_name), | |
| 407 | + prog_name, false, NULL); | |
| 408 | +} | |
| 409 | + | |
| 398 | 410 | /* NOTE: affect other tests, must run in serial mode */ |
| 399 | 411 | void serial_test_fexit_bpf2bpf(void) |
| 400 | 412 | { |
| @@ -416,4 +428,6 @@ void serial_test_fexit_bpf2bpf(void) · 15 unmodified lines | ||
| 416 | 428 | test_func_replace_multi(); |
| 417 | 429 | if (test__start_subtest("fmod_ret_freplace")) |
| 418 | 430 | test_fmod_ret_freplace(); |
| 431 | + if (test__start_subtest("func_replace_global_func")) | |
| 432 | + test_func_replace_global_func(); | |
| 419 | 433 | } |
| @@ -0,0 +1,18 @@ | ||
| 1 | +// SPDX-License-Identifier: GPL-2.0 | |
| 2 | +#include <linux/bpf.h> | |
| 3 | +#include <bpf/bpf_helpers.h> | |
| 4 | + | |
| 5 | +__noinline | |
| 6 | +int test_ctx_global_func(struct __sk_buff *skb) | |
| 7 | +{ | |
| 8 | + volatile int retval = 1; | |
| 9 | + return retval; | |
| 10 | +} | |
| 11 | + | |
| 12 | +SEC("freplace/test_pkt_access") | |
| 13 | +int new_test_pkt_access(struct __sk_buff *skb) | |
| 14 | +{ | |
| 15 | + return test_ctx_global_func(skb); | |
| 16 | +} | |
| 17 | + | |
| 18 | +char _license[] SEC("license") = "GPL"; | |