Commit-ID: c766f3df635de14295e410c6dd5410bc416c24a0 Gitweb: https://git.kernel.org/tip/c766f3df635de14295e410c6dd5410bc416c24a0 Author: Igor Lubashev <iluba...@akamai.com> AuthorDate: Wed, 7 Aug 2019 10:44:17 -0400 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Wed, 14 Aug 2019 10:59:59 -0300
perf ftrace: Use CAP_SYS_ADMIN instead of euid==0 The kernel requires CAP_SYS_ADMIN instead of euid==0 to mount debugfs for ftrace. Make perf do the same. Signed-off-by: Igor Lubashev <iluba...@akamai.com> Acked-by: Jiri Olsa <jo...@kernel.org> Cc: Alexander Shishkin <alexander.shish...@linux.intel.com> Cc: Alexey Budankov <alexey.budan...@linux.intel.com> Cc: James Morris <jmor...@namei.org> Cc: Mathieu Poirier <mathieu.poir...@linaro.org> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Suzuki Poulouse <suzuki.poul...@arm.com> Cc: linux-arm-ker...@lists.infradead.org Link: http://lkml.kernel.org/r/bd8763b72ed4d58d0b42d44fbc7eb474d32e53a3.1565188228.git.iluba...@akamai.com Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/builtin-ftrace.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c index 20d4c0ce8b53..01a5bb58eb04 100644 --- a/tools/perf/builtin-ftrace.c +++ b/tools/perf/builtin-ftrace.c @@ -13,6 +13,7 @@ #include <signal.h> #include <fcntl.h> #include <poll.h> +#include <linux/capability.h> #include "debug.h" #include <subcmd/parse-options.h> @@ -21,6 +22,7 @@ #include "target.h" #include "cpumap.h" #include "thread_map.h" +#include "util/cap.h" #include "util/config.h" @@ -281,7 +283,7 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv) .events = POLLIN, }; - if (geteuid() != 0) { + if (!perf_cap__capable(CAP_SYS_ADMIN)) { pr_err("ftrace only works for root!\n"); return -1; }
