Arnaldo Carvalho de Melo 5620196951 perf: Make perf_event_output() propagate the output() return ... For the original mode of operation it isn't needed, since we report back errors via PERF_RECORD_LOST records in the ring buffer, but for use in bpf_perf_event_output() it is convenient to return the errors, basically -ENOSPC. Currently bpf_perf_event_output() returns an error indication, the last thing it does, which is to push it to the ring buffer is that can fail and if so, this failure won't be reported back to its users, fix it. Reported-by: Jamal Hadi Salim <jhs@mojatatu.com> Tested-by: Jamal Hadi Salim <jhs@mojatatu.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/r/20190118150938.GN5823@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2019-01-21 17:00:57 -03:00
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5sec.c	perf bpf: Add probe() helper to reduce kprobes boilerplate	2018-05-15 14:31:24 -03:00
augmented_raw_syscalls.c	perf: Make perf_event_output() propagate the output() return	2019-01-21 17:00:57 -03:00
augmented_syscalls.c	perf: Make perf_event_output() propagate the output() return	2019-01-21 17:00:57 -03:00
empty.c	perf bpf: Add license(NAME) helper	2018-05-15 14:31:24 -03:00
etcsnoop.c	perf: Make perf_event_output() propagate the output() return	2019-01-21 17:00:57 -03:00
hello.c	perf bpf: Add bpf/stdio.h wrapper to bpf_perf_event_output function	2018-08-08 15:55:55 -03:00
sys_enter_openat.c	perf bpf: Add 'syscall_enter' probe helper for syscall enter tracepoints	2018-08-08 15:55:44 -03:00