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Subject[PATCH 16/31] tools lib api fs: Add FSTYPE__configured() method
Date
From: Jiri Olsa <jolsa@kernel.org>

Add FSTYPE__configured() (where FSTYPE is one of sysfs, procfs, debugfs,
tracefs) interface that returns bool state of the filesystem mount:

true - mounted, false - not mounted

It will not try to mount the filesystem.

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/1441180605-24737-13-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/lib/api/fs/fs.c | 23 ++++++++++++++---------
tools/lib/api/fs/fs.h | 5 ++++-
2 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index bc93baf33fff..8afe08a99bc6 100644
--- a/tools/lib/api/fs/fs.c
+++ b/tools/lib/api/fs/fs.c
@@ -244,15 +244,20 @@ static const char *fs__mount(int idx)
return fs__check_mounts(fs) ? fs->path : NULL;
}

-#define FS(name, idx) \
-const char *name##__mountpoint(void) \
-{ \
- return fs__mountpoint(idx); \
-} \
- \
-const char *name##__mount(void) \
-{ \
- return fs__mount(idx); \
+#define FS(name, idx) \
+const char *name##__mountpoint(void) \
+{ \
+ return fs__mountpoint(idx); \
+} \
+ \
+const char *name##__mount(void) \
+{ \
+ return fs__mount(idx); \
+} \
+ \
+bool name##__configured(void) \
+{ \
+ return name##__mountpoint() != NULL; \
}

FS(sysfs, FS__SYSFS);
diff --git a/tools/lib/api/fs/fs.h b/tools/lib/api/fs/fs.h
index a9627ea5e6ae..f654bcb99d1e 100644
--- a/tools/lib/api/fs/fs.h
+++ b/tools/lib/api/fs/fs.h
@@ -1,6 +1,8 @@
#ifndef __API_FS__
#define __API_FS__

+#include <stdbool.h>
+
/*
* On most systems <limits.h> would have given us this, but not on some systems
* (e.g. GNU/Hurd).
@@ -11,7 +13,8 @@

#define FS(name) \
const char *name##__mountpoint(void); \
- const char *name##__mount(void);
+ const char *name##__mount(void); \
+ bool name##__configured(void); \

FS(sysfs)
FS(procfs)
--
2.1.0


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