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    Subject[tip:perf/core] tools lib api fs: Add FSTYPE__configured() method
    Commit-ID:  709adcb33928b5bf965587b23ed6544e964584a3
    Gitweb: http://git.kernel.org/tip/709adcb33928b5bf965587b23ed6544e964584a3
    Author: Jiri Olsa <jolsa@kernel.org>
    AuthorDate: Wed, 2 Sep 2015 09:56:42 +0200
    Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
    CommitDate: Fri, 4 Sep 2015 12:01:01 -0300

    tools lib api fs: Add FSTYPE__configured() method

    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 bc93baf..8afe08a 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 a9627ea..f654bcb 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)

    \
     
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