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    Subject[tip:perf/core] tools lib api fs: Add {tracefs, debugfs}_configured() functions
    Commit-ID:  dd6dda27a8be563eaebb3f38b1d1d50920bb7991
    Gitweb: http://git.kernel.org/tip/dd6dda27a8be563eaebb3f38b1d1d50920bb7991
    Author: Steven Rostedt (Red Hat) <rostedt@goodmis.org>
    AuthorDate: Mon, 2 Feb 2015 14:35:06 -0500
    Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
    CommitDate: Sat, 7 Feb 2015 14:00:10 +0100

    tools lib api fs: Add {tracefs,debugfs}_configured() functions

    Add tracefs_configured() to return true if tracefs is configured in the
    kernel (succeeds to find tracefs), and debugfs_configured() if debugfs
    is configured in the kernel (succeeds to find debugfs).

    Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
    Acked-by: Jiri Olsa <jolsa@kernel.org>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Link: http://lkml.kernel.org/r/20150202193553.190606690@goodmis.org
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
    ---
    tools/lib/api/fs/debugfs.c | 8 ++++++++
    tools/lib/api/fs/debugfs.h | 1 +
    tools/lib/api/fs/findfs.h | 2 ++
    tools/lib/api/fs/tracefs.c | 8 ++++++++
    tools/lib/api/fs/tracefs.h | 1 +
    5 files changed, 20 insertions(+)

    diff --git a/tools/lib/api/fs/debugfs.c b/tools/lib/api/fs/debugfs.c
    index 07d74b0..8305b3e 100644
    --- a/tools/lib/api/fs/debugfs.c
    +++ b/tools/lib/api/fs/debugfs.c
    @@ -3,8 +3,11 @@
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    +#include <unistd.h>
    #include <stdbool.h>
    #include <sys/vfs.h>
    +#include <sys/types.h>
    +#include <sys/stat.h>
    #include <sys/mount.h>
    #include <linux/kernel.h>

    @@ -24,6 +27,11 @@ static const char * const debugfs_known_mountpoints[] = {

    static bool debugfs_found;

    +bool debugfs_configured(void)
    +{
    + return debugfs_find_mountpoint() != NULL;
    +}
    +
    /* find the path to the mounted debugfs */
    const char *debugfs_find_mountpoint(void)
    {
    diff --git a/tools/lib/api/fs/debugfs.h b/tools/lib/api/fs/debugfs.h
    index 1074ac8..4550236 100644
    --- a/tools/lib/api/fs/debugfs.h
    +++ b/tools/lib/api/fs/debugfs.h
    @@ -11,6 +11,7 @@
    #define PERF_DEBUGFS_ENVIRONMENT "PERF_DEBUGFS_DIR"
    #endif

    +bool debugfs_configured(void);
    const char *debugfs_find_mountpoint(void);
    char *debugfs_mount(const char *mountpoint);

    diff --git a/tools/lib/api/fs/findfs.h b/tools/lib/api/fs/findfs.h
    index 9e7d876..b6f5d05 100644
    --- a/tools/lib/api/fs/findfs.h
    +++ b/tools/lib/api/fs/findfs.h
    @@ -1,6 +1,8 @@
    #ifndef __API_FINDFS_H__
    #define __API_FINDFS_H__

    +#include <stdbool.h>
    +
    #define _STR(x) #x
    #define STR(x) _STR(x)

    diff --git a/tools/lib/api/fs/tracefs.c b/tools/lib/api/fs/tracefs.c
    index ef40d15..e4aa968 100644
    --- a/tools/lib/api/fs/tracefs.c
    +++ b/tools/lib/api/fs/tracefs.c
    @@ -2,8 +2,11 @@
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    +#include <unistd.h>
    #include <stdbool.h>
    #include <sys/vfs.h>
    +#include <sys/types.h>
    +#include <sys/stat.h>
    #include <sys/mount.h>
    #include <linux/kernel.h>

    @@ -25,6 +28,11 @@ static const char * const tracefs_known_mountpoints[] = {

    static bool tracefs_found;

    +bool tracefs_configured(void)
    +{
    + return tracefs_find_mountpoint() != NULL;
    +}
    +
    /* find the path to the mounted tracefs */
    const char *tracefs_find_mountpoint(void)
    {
    diff --git a/tools/lib/api/fs/tracefs.h b/tools/lib/api/fs/tracefs.h
    index e6f7f51..da780ac 100644
    --- a/tools/lib/api/fs/tracefs.h
    +++ b/tools/lib/api/fs/tracefs.h
    @@ -11,6 +11,7 @@
    #define PERF_TRACEFS_ENVIRONMENT "PERF_TRACEFS_DIR"
    #endif

    +bool tracefs_configured(void);
    const char *tracefs_find_mountpoint(void);
    int tracefs_valid_mountpoint(const char *debugfs);
    char *tracefs_mount(const char *mountpoint);

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