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/sampleip_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/sampleip_user.c')
| -rw-r--r-- | samples/bpf/sampleip_user.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/samples/bpf/sampleip_user.c b/samples/bpf/sampleip_user.c index 4372d2da2f9e..921c505bb567 100644 --- a/samples/bpf/sampleip_user.c +++ b/samples/bpf/sampleip_user.c @@ -18,9 +18,6 @@ #include "perf-sys.h" #include "trace_helpers.h" -#define __must_check -#include <linux/err.h> - #define DEFAULT_FREQ 99 #define DEFAULT_SECS 5 #define MAX_IPS 8192 @@ -57,7 +54,7 @@ static int sampling_start(int freq, struct bpf_program *prog, return 1; } links[i] = bpf_program__attach_perf_event(prog, pmu_fd); - if (IS_ERR(links[i])) { + if (libbpf_get_error(links[i])) { fprintf(stderr, "ERROR: Attach perf event\n"); links[i] = NULL; close(pmu_fd); @@ -182,7 +179,7 @@ int main(int argc, char **argv) snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); obj = bpf_object__open_file(filename, NULL); - if (IS_ERR(obj)) { + if (libbpf_get_error(obj)) { fprintf(stderr, "ERROR: opening BPF object file failed\n"); obj = NULL; goto cleanup; |