[tip:perf/core] perf evlist: Support using -f to override perf.data file ownership
From: tip-bot for Yunlong Song
Date: Fri Apr 03 2015 - 01:08:37 EST
Commit-ID: 9e3b6ec17374299516d83c2e36135b958a895aa3
Gitweb: http://git.kernel.org/tip/9e3b6ec17374299516d83c2e36135b958a895aa3
Author: Yunlong Song <yunlong.song@xxxxxxxxxx>
AuthorDate: Thu, 2 Apr 2015 21:47:10 +0800
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 2 Apr 2015 13:18:45 -0300
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 [<options>]
-i, --input <file> 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 <yunlong.song@xxxxxxxxxx>
Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1427982439-27388-2-git-send-email-yunlong.song@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
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 0f93f85..695ec5a 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 dcf202a..c5a43d6 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,
--
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