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perf probe: Fix to use correct debugfs path finder 

Instead of using debugfs_path, use debugfs_find_mountpoint()
to find actual debugfs path.

LKML-Reference: <20100414223928.14630.38326.stgit@localhost6.localdomain6>
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Reported-by: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
hifive-unleashed-5.1
Masami Hiramatsu 2010-04-14 18:39:28 -04:00 committed by Arnaldo Carvalho de Melo
parent 02b95dadc8
commit 7ca5989dd0
2 changed files with 10 additions and 6 deletions
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4
tools/perf/builtin-probe.c
View File

@ -40,7 +40,6 @@
#include "util/debug.h"
#include "util/debugfs.h"
#include "util/parse-options.h"
#include "util/parse-events.h" /* For debugfs_path */
#include "util/probe-finder.h"
#include "util/probe-event.h"
@ -205,9 +204,6 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
!params.show_lines))
usage_with_options(probe_usage, options);
if (debugfs_valid_mountpoint(debugfs_path) < 0)
die("Failed to find debugfs path.");
if (params.list_events) {
if (params.nevents != 0 || params.dellist) {
pr_err(" Error: Don't use --list with --add/--del.\n");

12
tools/perf/util/probe-event.c
View File

@ -42,8 +42,8 @@
#include "color.h"
#include "symbol.h"
#include "thread.h"
#include "debugfs.h"
#include "trace-event.h" /* For __unused */
#include "parse-events.h" /* For debugfs_path */
#include "probe-event.h"
#include "probe-finder.h"
@ -1075,10 +1075,18 @@ void clear_kprobe_trace_event(struct kprobe_trace_event *tev)
static int open_kprobe_events(bool readwrite)
{
char buf[PATH_MAX];
const char *__debugfs;
int ret;
ret = e_snprintf(buf, PATH_MAX, "%s/../kprobe_events", debugfs_path);
__debugfs = debugfs_find_mountpoint();
if (__debugfs == NULL) {
pr_warning("Debugfs is not mounted.\n");
return -ENOENT;
}
ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs);
if (ret >= 0) {
pr_debug("Opening %s write=%d\n", buf, readwrite);
if (readwrite && !probe_event_dry_run)
ret = open(buf, O_RDWR, O_APPEND);
else