[tip:perf/core] tools lib api fs: Add tracefs into fs.c object

[tip-bot for Jiri Olsa <tipbot@zytor.com>]

Commit-ID:  c495afb4988dcbb8bae11b8f1bbb7e11f172672b
Gitweb:     http://git.kernel.org/tip/c495afb4988dcbb8bae11b8f1bbb7e11f172672b
Author:     Jiri Olsa <jolsa@kernel.org>
AuthorDate: Wed, 2 Sep 2015 09:56:40 +0200
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 4 Sep 2015 12:01:00 -0300

tools lib api fs: Add tracefs into fs.c object

Adding tracefs support into fs.c framework. It'll replace the tracefs
object functionality in following patches.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Raphael Beamonte <raphael.beamonte@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1441180605-24737-11-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/lib/api/fs/fs.c | 28 ++++++++++++++++++++++++++++
 tools/lib/api/fs/fs.h |  1 +
 2 files changed, 29 insertions(+)

diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index 798052c..ef16d2a 100644
--- a/tools/lib/api/fs/fs.c
+++ b/tools/lib/api/fs/fs.c
@@ -28,6 +28,10 @@
 #define DEBUGFS_MAGIC          0x64626720
 #endif
 
+#ifndef TRACEFS_MAGIC
+#define TRACEFS_MAGIC          0x74726163
+#endif
+
 static const char * const sysfs__fs_known_mountpoints[] = {
 	"/sys",
 	0,
@@ -48,6 +52,19 @@ static const char * const debugfs__known_mountpoints[] = {
 	0,
 };
 
+
+#ifndef TRACEFS_DEFAULT_PATH
+#define TRACEFS_DEFAULT_PATH "/sys/kernel/tracing"
+#endif
+
+static const char * const tracefs__known_mountpoints[] = {
+	TRACEFS_DEFAULT_PATH,
+	"/sys/kernel/debug/tracing",
+	"/tracing",
+	"/trace",
+	0,
+};
+
 struct fs {
 	const char		*name;
 	const char * const	*mounts;
@@ -60,8 +77,13 @@ enum {
 	FS__SYSFS   = 0,
 	FS__PROCFS  = 1,
 	FS__DEBUGFS = 2,
+	FS__TRACEFS = 3,
 };
 
+#ifndef TRACEFS_MAGIC
+#define TRACEFS_MAGIC 0x74726163
+#endif
+
 static struct fs fs__entries[] = {
 	[FS__SYSFS] = {
 		.name	= "sysfs",
@@ -78,6 +100,11 @@ static struct fs fs__entries[] = {
 		.mounts	= debugfs__known_mountpoints,
 		.magic	= DEBUGFS_MAGIC,
 	},
+	[FS__TRACEFS] = {
+		.name	= "tracefs",
+		.mounts	= tracefs__known_mountpoints,
+		.magic	= TRACEFS_MAGIC,
+	},
 };
 
 static bool fs__read_mounts(struct fs *fs)
@@ -197,6 +224,7 @@ const char *name##__mountpoint(void)	\
 FS__MOUNTPOINT(sysfs,   FS__SYSFS);
 FS__MOUNTPOINT(procfs,  FS__PROCFS);
 FS__MOUNTPOINT(debugfs, FS__DEBUGFS);
+FS__MOUNTPOINT(tracefs, FS__TRACEFS);
 
 int filename__read_int(const char *filename, int *value)
 {
diff --git a/tools/lib/api/fs/fs.h b/tools/lib/api/fs/fs.h
index a4e6b1d..9013227 100644
--- a/tools/lib/api/fs/fs.h
+++ b/tools/lib/api/fs/fs.h
@@ -12,6 +12,7 @@
 const char *sysfs__mountpoint(void);
 const char *procfs__mountpoint(void);
 const char *debugfs__mountpoint(void);
+const char *tracefs__mountpoint(void);
 
 int filename__read_int(const char *filename, int *value);
 int sysctl__read_int(const char *sysctl, int *value);