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Date: Wed, 2 Sep 2015 09:56:35 +0200
From: Jiri Olsa <jolsa@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: lkml <linux-kernel@...r.kernel.org>,
David Ahern <dsahern@...il.com>,
Ingo Molnar <mingo@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Matt Fleming <matt@...eblueprint.co.uk>,
Raphaël Beamonte <raphael.beamonte@...il.com>,
Steven Rostedt <rostedt@...dmis.org>
Subject: [PATCH 05/15] tools lib api: Move debugfs__strerror_open into tracing_path.c object
Moving debugfs__strerror_open out of api/fs/debugfs.c,
because it's not debugfs specific. It'll be changed to
consider tracefs mount as well in following patches.
Renaming it into tracing_path__strerror_open_tp to fit
into the namespace. No functional change is intended.
Link: http://lkml.kernel.org/n/tip-bq0f0l4r0bjvy0pjp4m759kv@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
tools/lib/api/fs/debugfs.c | 52 ---------------------------------------
tools/lib/api/fs/tracing_path.c | 54 +++++++++++++++++++++++++++++++++++++++++
tools/lib/api/fs/tracing_path.h | 3 +++
tools/perf/builtin-trace.c | 5 ++--
4 files changed, 60 insertions(+), 54 deletions(-)
diff --git a/tools/lib/api/fs/debugfs.c b/tools/lib/api/fs/debugfs.c
index eb7cf4d18f8a..c707cfb32782 100644
--- a/tools/lib/api/fs/debugfs.c
+++ b/tools/lib/api/fs/debugfs.c
@@ -75,55 +75,3 @@ char *debugfs_mount(const char *mountpoint)
out:
return debugfs_mountpoint;
}
-
-int debugfs__strerror_open(int err, char *buf, size_t size, const char *filename)
-{
- char sbuf[128];
-
- switch (err) {
- case ENOENT:
- if (debugfs_found) {
- snprintf(buf, size,
- "Error:\tFile %s/%s not found.\n"
- "Hint:\tPerhaps this kernel misses some CONFIG_ setting to enable this feature?.\n",
- debugfs_mountpoint, filename);
- break;
- }
- snprintf(buf, size, "%s",
- "Error:\tUnable to find debugfs\n"
- "Hint:\tWas your kernel compiled with debugfs support?\n"
- "Hint:\tIs the debugfs filesystem mounted?\n"
- "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'");
- break;
- case EACCES: {
- const char *mountpoint = debugfs_mountpoint;
-
- if (!access(debugfs_mountpoint, R_OK) && strncmp(filename, "tracing/", 8) == 0) {
- const char *tracefs_mntpoint = tracefs_find_mountpoint();
-
- if (tracefs_mntpoint)
- mountpoint = tracefs_mntpoint;
- }
-
- snprintf(buf, size,
- "Error:\tNo permissions to read %s/%s\n"
- "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n",
- debugfs_mountpoint, filename, mountpoint);
- }
- break;
- default:
- snprintf(buf, size, "%s", strerror_r(err, sbuf, sizeof(sbuf)));
- break;
- }
-
- return 0;
-}
-
-int debugfs__strerror_open_tp(int err, char *buf, size_t size, const char *sys, const char *name)
-{
- char path[PATH_MAX];
-
- snprintf(path, PATH_MAX, "tracing/events/%s/%s", sys, name ?: "*");
-
- return debugfs__strerror_open(err, buf, size, path);
-}
diff --git a/tools/lib/api/fs/tracing_path.c b/tools/lib/api/fs/tracing_path.c
index 1fd6e1f99234..3b3e4f5fc50b 100644
--- a/tools/lib/api/fs/tracing_path.c
+++ b/tools/lib/api/fs/tracing_path.c
@@ -5,6 +5,8 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <errno.h>
+#include <unistd.h>
#include "debugfs.h"
#include "tracefs.h"
@@ -81,3 +83,55 @@ void put_tracing_file(char *file)
{
free(file);
}
+
+static int strerror_open(int err, char *buf, size_t size, const char *filename)
+{
+ char sbuf[128];
+
+ switch (err) {
+ case ENOENT:
+ if (debugfs_configured()) {
+ snprintf(buf, size,
+ "Error:\tFile %s/%s not found.\n"
+ "Hint:\tPerhaps this kernel misses some CONFIG_ setting to enable this feature?.\n",
+ debugfs_mountpoint, filename);
+ break;
+ }
+ snprintf(buf, size, "%s",
+ "Error:\tUnable to find debugfs\n"
+ "Hint:\tWas your kernel compiled with debugfs support?\n"
+ "Hint:\tIs the debugfs filesystem mounted?\n"
+ "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'");
+ break;
+ case EACCES: {
+ const char *mountpoint = debugfs_mountpoint;
+
+ if (!access(debugfs_mountpoint, R_OK) && strncmp(filename, "tracing/", 8) == 0) {
+ const char *tracefs_mntpoint = tracefs_find_mountpoint();
+
+ if (tracefs_mntpoint)
+ mountpoint = tracefs_mntpoint;
+ }
+
+ snprintf(buf, size,
+ "Error:\tNo permissions to read %s/%s\n"
+ "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n",
+ debugfs_mountpoint, filename, mountpoint);
+ }
+ break;
+ default:
+ snprintf(buf, size, "%s", strerror_r(err, sbuf, sizeof(sbuf)));
+ break;
+ }
+
+ return 0;
+}
+
+int tracing_path__strerror_open_tp(int err, char *buf, size_t size, const char *sys, const char *name)
+{
+ char path[PATH_MAX];
+
+ snprintf(path, PATH_MAX, "tracing/events/%s/%s", sys, name ?: "*");
+
+ return strerror_open(err, buf, size, path);
+}
diff --git a/tools/lib/api/fs/tracing_path.h b/tools/lib/api/fs/tracing_path.h
index b132dc599fe5..3f233ac70b6f 100644
--- a/tools/lib/api/fs/tracing_path.h
+++ b/tools/lib/api/fs/tracing_path.h
@@ -1,6 +1,8 @@
#ifndef __API_FS_TRACING_PATH_H
#define __API_FS_TRACING_PATH_H
+#include <linux/types.h>
+
extern char tracing_path[];
extern char tracing_events_path[];
@@ -10,4 +12,5 @@ const char *tracing_path_mount(void);
char *get_tracing_file(const char *name);
void put_tracing_file(char *file);
+int tracing_path__strerror_open_tp(int err, char *buf, size_t size, const char *sys, const char *name);
#endif /* __API_FS_TRACING_PATH_H */
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 4e3abba03062..215653274102 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -17,6 +17,7 @@
*/
#include <traceevent/event-parse.h>
+#include <api/fs/tracing_path.h>
#include "builtin.h"
#include "util/color.h"
#include "util/debug.h"
@@ -2686,11 +2687,11 @@ out_delete_evlist:
char errbuf[BUFSIZ];
out_error_sched_stat_runtime:
- debugfs__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
+ tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
goto out_error;
out_error_raw_syscalls:
- debugfs__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
+ tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
goto out_error;
out_error_mmap:
--
2.4.3
--
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