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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-08-23 15:54:02 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-08-26 11:58:29 -0300 |
| commit | e051c2f69850e571cb408b555aaffb00c07dbb05 (patch) | |
| tree | cceb3e7253791d39ed61264a298f1f072d5181ed /tools/perf/examples | |
| parent | c265784de7adff9e07934b712204556fb0b3ba43 (diff) | |
| download | linux-e051c2f69850e571cb408b555aaffb00c07dbb05.tar.gz linux-e051c2f69850e571cb408b555aaffb00c07dbb05.tar.bz2 linux-e051c2f69850e571cb408b555aaffb00c07dbb05.zip | |
perf augmented_raw_syscalls: Reduce perf_event_output() boilerplate
Add a augmented__output() helper to reduce the boilerplate of sending
the augmented tracepoint to the PERF_EVENT_ARRAY BPF map associated with
the bpf-output event used to communicate with the userspace perf trace
tool.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-ln99gt0j4fv0kw0778h6vphm@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/examples')
| -rw-r--r-- | tools/perf/examples/bpf/augmented_raw_syscalls.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/tools/perf/examples/bpf/augmented_raw_syscalls.c b/tools/perf/examples/bpf/augmented_raw_syscalls.c index 8fd5ea059903..b80437971d80 100644 --- a/tools/perf/examples/bpf/augmented_raw_syscalls.c +++ b/tools/perf/examples/bpf/augmented_raw_syscalls.c @@ -87,6 +87,12 @@ static inline struct augmented_args_payload *augmented_args_payload(void) return bpf_map_lookup_elem(&augmented_args_tmp, &key); } +static inline int augmented__output(void *ctx, struct augmented_args_payload *args, int len) +{ + /* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */ + return perf_event_output(ctx, &__augmented_syscalls__, BPF_F_CURRENT_CPU, args, len); +} + static inline unsigned int augmented_arg__read_str(struct augmented_arg *augmented_arg, const void *arg, unsigned int arg_len) { @@ -142,8 +148,7 @@ int sys_enter_connect(struct syscall_enter_args *args) probe_read(&augmented_args->saddr, socklen, sockaddr_arg); - /* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */ - return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len + socklen); + return augmented__output(args, augmented_args, len + socklen); } SEC("!syscalls:sys_enter_sendto") @@ -162,8 +167,7 @@ int sys_enter_sendto(struct syscall_enter_args *args) probe_read(&augmented_args->saddr, socklen, sockaddr_arg); - /* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */ - return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len + socklen); + return augmented__output(args, augmented_args, len + socklen); } SEC("!syscalls:sys_enter_open") @@ -178,8 +182,7 @@ int sys_enter_open(struct syscall_enter_args *args) len += augmented_arg__read_str(&augmented_args->arg, filename_arg, sizeof(augmented_args->arg.value)); - /* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */ - return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len); + return augmented__output(args, augmented_args, len); } SEC("!syscalls:sys_enter_openat") @@ -194,8 +197,7 @@ int sys_enter_openat(struct syscall_enter_args *args) len += augmented_arg__read_str(&augmented_args->arg, filename_arg, sizeof(augmented_args->arg.value)); - /* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */ - return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len); + return augmented__output(args, augmented_args, len); } SEC("!syscalls:sys_enter_rename") @@ -212,8 +214,7 @@ int sys_enter_rename(struct syscall_enter_args *args) oldpath_len = augmented_arg__read_str(&augmented_args->arg, oldpath_arg, sizeof(augmented_args->arg.value)); len += oldpath_len + augmented_arg__read_str((void *)(&augmented_args->arg) + oldpath_len, newpath_arg, sizeof(augmented_args->arg.value)); - /* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */ - return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len); + return augmented__output(args, augmented_args, len); } SEC("!syscalls:sys_enter_renameat") @@ -230,8 +231,7 @@ int sys_enter_renameat(struct syscall_enter_args *args) oldpath_len = augmented_arg__read_str(&augmented_args->arg, oldpath_arg, sizeof(augmented_args->arg.value)); len += oldpath_len + augmented_arg__read_str((void *)(&augmented_args->arg) + oldpath_len, newpath_arg, sizeof(augmented_args->arg.value)); - /* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */ - return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len); + return augmented__output(args, augmented_args, len); } SEC("raw_syscalls:sys_enter") |