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perf data: Support using -f to override perf.data file ownership for 'convert'

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Enable perf data convert 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 17:35 perf.data
 # id
 uid=0(root) gid=0(root) groups=0(root),64(pkcs11)

Before this patch:

 # perf data convert --to-ctf=./ctf-data/
 File perf.data not owned by current user or root (use -f to override)
 # perf data convert --to-ctf=./ctf-data/ -f
   Error: unknown switch `f'

  usage: perf data convert [<options>]

     -v, --verbose         be more verbose
     -i, --input <file>    input file name
         --to-ctf ...      Convert to CTF format

After this patch:

 # perf data convert --to-ctf=./ctf-data/
 File perf.data not owned by current user or root (use -f to override)
 # perf data convert --to-ctf=./ctf-data/ -f
 # ls ctf-data/
 metadata  perf_stream_0

As shown above, the -f option really works now.

Signed-off-by: Yunlong Song <yunlong.song@huawei.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1427982439-27388-11-git-send-email-yunlong.song@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Yunlong Song 2015-04-02 21:47:19 +08:00 committed by Arnaldo Carvalho de Melo
parent e366a6d894
commit bd05954bfa
3 changed files with 6 additions and 3 deletions
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4
tools/perf/builtin-data.c
View File

@ -53,12 +53,14 @@ static int cmd_data_convert(int argc, const char **argv,
const char *prefix __maybe_unused)
{
const char *to_ctf = NULL;
bool force = false;
const struct option options[] = {
OPT_INCR('v', "verbose", &verbose, "be more verbose"),
OPT_STRING('i', "input", &input_name, "file", "input file name"),
#ifdef HAVE_LIBBABELTRACE_SUPPORT
OPT_STRING(0, "to-ctf", &to_ctf, NULL, "Convert to CTF format"),
#endif
OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
OPT_END()
};
@ -76,7 +78,7 @@ static int cmd_data_convert(int argc, const char **argv,
if (to_ctf) {
#ifdef HAVE_LIBBABELTRACE_SUPPORT
return bt_convert__perf2ctf(input_name, to_ctf);
return bt_convert__perf2ctf(input_name, to_ctf, force);
#else
pr_err("The libbabeltrace support is not compiled in.\n");
return -1;

3
tools/perf/util/data-convert-bt.c
View File

@ -791,12 +791,13 @@ static int ctf_writer__init(struct ctf_writer *cw, const char *path)
return -1;
}
int bt_convert__perf2ctf(const char *input, const char *path)
int bt_convert__perf2ctf(const char *input, const char *path, bool force)
{
struct perf_session *session;
struct perf_data_file file = {
.path = input,
.mode = PERF_DATA_MODE_READ,
.force = force,
};
struct convert c = {
.tool = {

2
tools/perf/util/data-convert-bt.h
View File

@ -2,7 +2,7 @@
#define __DATA_CONVERT_BT_H
#ifdef HAVE_LIBBABELTRACE_SUPPORT
int bt_convert__perf2ctf(const char *input_name, const char *to_ctf);
int bt_convert__perf2ctf(const char *input_name, const char *to_ctf, bool force);
#endif /* HAVE_LIBBABELTRACE_SUPPORT */
#endif /* __DATA_CONVERT_BT_H */