diff options
| author | Daniel T. Lee <danieltimlee@gmail.com> | 2020-05-16 13:06:04 +0900 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-05-19 17:12:49 +0200 |
| commit | 0efdcefb00d768442efef21560ea4c44d481fa5c (patch) | |
| tree | 8be1ed7d70e6a61c43d53f984061e5d2acd1e4a3 /samples/bpf/trace_event_user.c | |
| parent | 96586dd9268d26b278a1dd9110080001a6acbb0f (diff) | |
samples, bpf: Refactor pointer error check with libbpf
Current method of checking pointer error is not user friendly.
Especially the __must_check define makes this less intuitive.
Since, libbpf has an API libbpf_get_error() which checks pointer error,
this commit refactors existing pointer error check logic with libbpf.
Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200516040608.1377876-2-danieltimlee@gmail.com
Diffstat (limited to 'samples/bpf/trace_event_user.c')
| -rw-r--r-- | samples/bpf/trace_event_user.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/samples/bpf/trace_event_user.c b/samples/bpf/trace_event_user.c index b6cd358d0418..ac1ba368195c 100644 --- a/samples/bpf/trace_event_user.c +++ b/samples/bpf/trace_event_user.c @@ -16,9 +16,6 @@ #include "perf-sys.h" #include "trace_helpers.h" -#define __must_check -#include <linux/err.h> - #define SAMPLE_FREQ 50 static int pid; @@ -159,7 +156,7 @@ static void test_perf_event_all_cpu(struct perf_event_attr *attr) goto all_cpu_err; } links[i] = bpf_program__attach_perf_event(prog, pmu_fd); - if (IS_ERR(links[i])) { + if (libbpf_get_error(links[i])) { printf("bpf_program__attach_perf_event failed\n"); links[i] = NULL; close(pmu_fd); @@ -198,7 +195,7 @@ static void test_perf_event_task(struct perf_event_attr *attr) goto err; } link = bpf_program__attach_perf_event(prog, pmu_fd); - if (IS_ERR(link)) { + if (libbpf_get_error(link)) { printf("bpf_program__attach_perf_event failed\n"); link = NULL; close(pmu_fd); @@ -314,7 +311,7 @@ int main(int argc, char **argv) } obj = bpf_object__open_file(filename, NULL); - if (IS_ERR(obj)) { + if (libbpf_get_error(obj)) { printf("opening BPF object file failed\n"); obj = NULL; goto cleanup; |