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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>
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@ -3,8 +3,11 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdbool.h>
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#include <sys/vfs.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <linux/kernel.h>
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@ -24,6 +27,11 @@ static const char * const debugfs_known_mountpoints[] = {
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static bool debugfs_found;
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bool debugfs_configured(void)
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{
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return debugfs_find_mountpoint() != NULL;
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}
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/* find the path to the mounted debugfs */
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const char *debugfs_find_mountpoint(void)
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{
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@ -11,6 +11,7 @@
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#define PERF_DEBUGFS_ENVIRONMENT "PERF_DEBUGFS_DIR"
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#endif
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bool debugfs_configured(void);
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const char *debugfs_find_mountpoint(void);
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char *debugfs_mount(const char *mountpoint);
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@ -1,6 +1,8 @@
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#ifndef __API_FINDFS_H__
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#define __API_FINDFS_H__
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#include <stdbool.h>
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#define _STR(x) #x
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#define STR(x) _STR(x)
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@ -2,8 +2,11 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdbool.h>
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#include <sys/vfs.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <linux/kernel.h>
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@ -25,6 +28,11 @@ static const char * const tracefs_known_mountpoints[] = {
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static bool tracefs_found;
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bool tracefs_configured(void)
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{
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return tracefs_find_mountpoint() != NULL;
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}
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/* find the path to the mounted tracefs */
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const char *tracefs_find_mountpoint(void)
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{
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@ -11,6 +11,7 @@
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#define PERF_TRACEFS_ENVIRONMENT "PERF_TRACEFS_DIR"
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#endif
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bool tracefs_configured(void);
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const char *tracefs_find_mountpoint(void);
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int tracefs_valid_mountpoint(const char *debugfs);
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char *tracefs_mount(const char *mountpoint);
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