From 9e3b6ec17374299516d83c2e36135b958a895aa3 Mon Sep 17 00:00:00 2001 From: Yunlong Song Date: Thu, 2 Apr 2015 21:47:10 +0800 Subject: [PATCH] perf evlist: Support using -f to override perf.data file ownership Enable perf evlist to use perf.data when it is not owned by current user or root. Example: # perf record ls # chown Yunlong.Song:Yunlong.Song perf.data # ls -al perf.data -rw------- 1 Yunlong.Song Yunlong.Song 28260 Apr 2 10:18 perf.data # id uid=0(root) gid=0(root) groups=0(root),64(pkcs11) Before this patch: # perf evlist File perf.data not owned by current user or root (use -f to override) # perf evlist -f Error: unknown switch `f' usage: perf evlist [] -i, --input Input file name -F, --freq Show the sample frequency -v, --verbose Show all event attr details -g, --group Show event group information As shown above, the -f option does not work at all. After this patch: # perf evlist File perf.data not owned by current user or root (use -f to override) # perf evlist -f cycles As shown above, the -f option really works now. Signed-off-by: Yunlong Song Tested-by: Arnaldo Carvalho de Melo Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Wang Nan Link: http://lkml.kernel.org/r/1427982439-27388-2-git-send-email-yunlong.song@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-evlist.c | 2 ++ tools/perf/util/evsel.h | 1 + 2 files changed, 3 insertions(+) diff --git a/tools/perf/builtin-evlist.c b/tools/perf/builtin-evlist.c index 0f93f859b782..695ec5a50cf2 100644 --- a/tools/perf/builtin-evlist.c +++ b/tools/perf/builtin-evlist.c @@ -24,6 +24,7 @@ static int __cmd_evlist(const char *file_name, struct perf_attr_details *details struct perf_data_file file = { .path = file_name, .mode = PERF_DATA_MODE_READ, + .force = details->force, }; session = perf_session__new(&file, 0, NULL); @@ -47,6 +48,7 @@ int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused) "Show all event attr details"), OPT_BOOLEAN('g', "group", &details.event_group, "Show event group information"), + OPT_BOOLEAN('f', "force", &details.force, "don't complain, do it"), OPT_END() }; const char * const evlist_usage[] = { diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index dcf202aebe9f..c5a43d6b13dc 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -335,6 +335,7 @@ struct perf_attr_details { bool freq; bool verbose; bool event_group; + bool force; }; int perf_evsel__fprintf(struct perf_evsel *evsel, -- 2.39.5