summaryrefslogtreecommitdiffstats
path: root/tools/perf/util/debugfs.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/perf/util/debugfs.c')
-rw-r--r--tools/perf/util/debugfs.c111
1 files changed, 0 insertions, 111 deletions
diff --git a/tools/perf/util/debugfs.c b/tools/perf/util/debugfs.c
deleted file mode 100644
index e55495c7823a..000000000000
--- a/tools/perf/util/debugfs.c
+++ /dev/null
@@ -1,111 +0,0 @@
-#include "util.h"
-#include "debugfs.h"
-#include "cache.h"
-
-#include <linux/kernel.h>
-#include <sys/mount.h>
-
-char debugfs_mountpoint[PATH_MAX + 1] = "/sys/kernel/debug";
-char tracing_events_path[PATH_MAX + 1] = "/sys/kernel/debug/tracing/events";
-
-static const char *debugfs_known_mountpoints[] = {
- "/sys/kernel/debug/",
- "/debug/",
- 0,
-};
-
-static bool debugfs_found;
-
-/* find the path to the mounted debugfs */
-const char *debugfs_find_mountpoint(void)
-{
- const char **ptr;
- char type[100];
- FILE *fp;
-
- if (debugfs_found)
- return (const char *) debugfs_mountpoint;
-
- ptr = debugfs_known_mountpoints;
- while (*ptr) {
- if (debugfs_valid_mountpoint(*ptr) == 0) {
- debugfs_found = true;
- strcpy(debugfs_mountpoint, *ptr);
- return debugfs_mountpoint;
- }
- ptr++;
- }
-
- /* give up and parse /proc/mounts */
- fp = fopen("/proc/mounts", "r");
- if (fp == NULL)
- return NULL;
-
- while (fscanf(fp, "%*s %" STR(PATH_MAX) "s %99s %*s %*d %*d\n",
- debugfs_mountpoint, type) == 2) {
- if (strcmp(type, "debugfs") == 0)
- break;
- }
- fclose(fp);
-
- if (strcmp(type, "debugfs") != 0)
- return NULL;
-
- debugfs_found = true;
-
- return debugfs_mountpoint;
-}
-
-/* verify that a mountpoint is actually a debugfs instance */
-
-int debugfs_valid_mountpoint(const char *debugfs)
-{
- struct statfs st_fs;
-
- if (statfs(debugfs, &st_fs) < 0)
- return -ENOENT;
- else if (st_fs.f_type != (long) DEBUGFS_MAGIC)
- return -ENOENT;
-
- return 0;
-}
-
-static void debugfs_set_tracing_events_path(const char *mountpoint)
-{
- snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s",
- mountpoint, "tracing/events");
-}
-
-/* mount the debugfs somewhere if it's not mounted */
-
-char *debugfs_mount(const char *mountpoint)
-{
- /* see if it's already mounted */
- if (debugfs_find_mountpoint())
- goto out;
-
- /* if not mounted and no argument */
- if (mountpoint == NULL) {
- /* see if environment variable set */
- mountpoint = getenv(PERF_DEBUGFS_ENVIRONMENT);
- /* if no environment variable, use default */
- if (mountpoint == NULL)
- mountpoint = "/sys/kernel/debug";
- }
-
- if (mount(NULL, mountpoint, "debugfs", 0, NULL) < 0)
- return NULL;
-
- /* save the mountpoint */
- debugfs_found = true;
- strncpy(debugfs_mountpoint, mountpoint, sizeof(debugfs_mountpoint));
-out:
- debugfs_set_tracing_events_path(debugfs_mountpoint);
- return debugfs_mountpoint;
-}
-
-void debugfs_set_path(const char *mountpoint)
-{
- snprintf(debugfs_mountpoint, sizeof(debugfs_mountpoint), "%s", mountpoint);
- debugfs_set_tracing_events_path(mountpoint);
-}