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

Adding debugfs support into fs.c framework. It'll replace the debugfs
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/1441180605-24737-10-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 26 insertions, 6 deletions

diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index 0700eb953495..798052cbc7c0 100644
--- a/tools/lib/api/fs/fs.c
+++ b/tools/lib/api/fs/fs.c
@@ -1,5 +1,3 @@
-/* TODO merge/factor in debugfs.c here */
-
 #include <ctype.h>
 #include <errno.h>
 #include <stdbool.h>
@@ -26,6 +24,10 @@
 #define PROC_SUPER_MAGIC       0x9fa0
 #endif
 
+#ifndef DEBUGFS_MAGIC
+#define DEBUGFS_MAGIC          0x64626720
+#endif
+
 static const char * const sysfs__fs_known_mountpoints[] = {
         "/sys",
         0,
@@ -36,6 +38,16 @@ static const char * const procfs__known_mountpoints[] = {
         0,
 };
 
+#ifndef DEBUGFS_DEFAULT_PATH
+#define DEBUGFS_DEFAULT_PATH "/sys/kernel/debug"
+#endif
+
+static const char * const debugfs__known_mountpoints[] = {
+        DEBUGFS_DEFAULT_PATH,
+        "/debug",
+        0,
+};
+
 struct fs {
         const char              *name;
         const char * const      *mounts;
@@ -45,8 +57,9 @@ struct fs {
 };
 
 enum {
-        FS__SYSFS  = 0,
-        FS__PROCFS = 1,
+        FS__SYSFS   = 0,
+        FS__PROCFS  = 1,
+        FS__DEBUGFS = 2,
 };
 
 static struct fs fs__entries[] = {
@@ -60,6 +73,11 @@ static struct fs fs__entries[] = {
                 .mounts = procfs__known_mountpoints,
                 .magic  = PROC_SUPER_MAGIC,
         },
+        [FS__DEBUGFS] = {
+                .name   = "debugfs",
+                .mounts = debugfs__known_mountpoints,
+                .magic  = DEBUGFS_MAGIC,
+        },
 };
 
 static bool fs__read_mounts(struct fs *fs)
@@ -176,8 +194,9 @@ const char *name##__mountpoint(void)	\
         return fs__mountpoint(idx);     \
 }
 
-FS__MOUNTPOINT(sysfs,  FS__SYSFS);
-FS__MOUNTPOINT(procfs, FS__PROCFS);
+FS__MOUNTPOINT(sysfs,   FS__SYSFS);
+FS__MOUNTPOINT(procfs,  FS__PROCFS);
+FS__MOUNTPOINT(debugfs, FS__DEBUGFS);
 
 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 674efc8dfd9b..a4e6b1d93d2f 100644
--- a/tools/lib/api/fs/fs.h
+++ b/tools/lib/api/fs/fs.h
@@ -11,6 +11,7 @@
 
 const char *sysfs__mountpoint(void);
 const char *procfs__mountpoint(void);
+const char *debugfs__mountpoint(void);
 
 int filename__read_int(const char *filename, int *value);
 int sysctl__read_int(const char *sysctl, int *value);