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-rw-r--r--tools/lib/api/fs/tracing_path.c13
1 files changed, 3 insertions, 10 deletions
diff --git a/tools/lib/api/fs/tracing_path.c b/tools/lib/api/fs/tracing_path.c
index 38aca2dd1946..0406a7d5c891 100644
--- a/tools/lib/api/fs/tracing_path.c
+++ b/tools/lib/api/fs/tracing_path.c
@@ -12,12 +12,14 @@
12#include "tracing_path.h" 12#include "tracing_path.h"
13 13
14 14
15char tracing_mnt[PATH_MAX + 1] = "/sys/kernel/debug";
15char tracing_path[PATH_MAX + 1] = "/sys/kernel/debug/tracing"; 16char tracing_path[PATH_MAX + 1] = "/sys/kernel/debug/tracing";
16char tracing_events_path[PATH_MAX + 1] = "/sys/kernel/debug/tracing/events"; 17char tracing_events_path[PATH_MAX + 1] = "/sys/kernel/debug/tracing/events";
17 18
18 19
19static void __tracing_path_set(const char *tracing, const char *mountpoint) 20static void __tracing_path_set(const char *tracing, const char *mountpoint)
20{ 21{
22 snprintf(tracing_mnt, sizeof(tracing_mnt), "%s", mountpoint);
21 snprintf(tracing_path, sizeof(tracing_path), "%s/%s", 23 snprintf(tracing_path, sizeof(tracing_path), "%s/%s",
22 mountpoint, tracing); 24 mountpoint, tracing);
23 snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s%s", 25 snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s%s",
@@ -109,19 +111,10 @@ static int strerror_open(int err, char *buf, size_t size, const char *filename)
109 "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'"); 111 "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'");
110 break; 112 break;
111 case EACCES: { 113 case EACCES: {
112 const char *mountpoint = debugfs__mountpoint();
113
114 if (!access(mountpoint, R_OK) && strncmp(filename, "tracing/", 8) == 0) {
115 const char *tracefs_mntpoint = tracefs__mountpoint();
116
117 if (tracefs_mntpoint)
118 mountpoint = tracefs__mountpoint();
119 }
120
121 snprintf(buf, size, 114 snprintf(buf, size,
122 "Error:\tNo permissions to read %s/%s\n" 115 "Error:\tNo permissions to read %s/%s\n"
123 "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n", 116 "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n",
124 tracing_events_path, filename, mountpoint); 117 tracing_events_path, filename, tracing_mnt);
125 } 118 }
126 break; 119 break;
127 default: 120 default: