Messages in this thread Patch in this message | | | From | Igor Lubashev <> | Subject | [PATCH v3 4/4] perf: Use CAP_SYS_ADMIN instead of euid==0 with ftrace | Date | Wed, 7 Aug 2019 10:44:17 -0400 |
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Kernel requires CAP_SYS_ADMIN instead of euid==0 to mount debugfs for ftrace. Make perf do the same.
Signed-off-by: Igor Lubashev <ilubashe@akamai.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 ae1466aa3b26..d09eac8a6d57 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; } -- 2.7.4
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