tools lib fs: Pass filename to debugfs__strerror_open

It was hardcoded for one specific tracepoint, leftover from its initial
user: 'perf trace'.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-j1jicvwljy5qx1nah4mkmyke@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

3 files changed, 7 insertions, 6 deletions

diff --git a/tools/lib/api/fs/debugfs.c b/tools/lib/api/fs/debugfs.c
index fb700eed61c2..5e8f3913de43 100644
--- a/tools/lib/api/fs/debugfs.c
+++ b/tools/lib/api/fs/debugfs.c
@@ -100,7 +100,7 @@ out:
         return debugfs_mountpoint;
 }
 
-int debugfs__strerror_open(int err, char *buf, size_t size)
+int debugfs__strerror_open(int err, char *buf, size_t size, const char *filename)
 {
         char sbuf[128];
 
@@ -114,9 +114,9 @@ int debugfs__strerror_open(int err, char *buf, size_t size)
                 break;
         case EACCES:
                 snprintf(buf, size,
-                         "Error:\tNo permissions to read %s/tracing/events/raw_syscalls\n"
+                         "Error:\tNo permissions to read %s/%s\n"
                          "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n",
-                         debugfs_mountpoint, debugfs_mountpoint);
+                         debugfs_mountpoint, filename, debugfs_mountpoint);
                 break;
         default:
                 snprintf(buf, size, "%s", strerror_r(err, sbuf, sizeof(sbuf)));
diff --git a/tools/lib/api/fs/debugfs.h b/tools/lib/api/fs/debugfs.h
index afa5043fec61..a1799aecd4d5 100644
--- a/tools/lib/api/fs/debugfs.h
+++ b/tools/lib/api/fs/debugfs.h
@@ -26,6 +26,6 @@ char *debugfs_mount(const char *mountpoint);
 
 extern char debugfs_mountpoint[];
 
-int debugfs__strerror_open(int err, char *buf, size_t size);
+int debugfs__strerror_open(int err, char *buf, size_t size, const char *filename);
 
 #endif /* __API_DEBUGFS_H__ */
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 2f82dd78b086..684609d7a83d 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2056,7 +2056,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
         if (trace->trace_syscalls &&
             perf_evlist__add_syscall_newtp(evlist, trace__sys_enter,
                                            trace__sys_exit))
-                goto out_error_tp;
+                goto out_error_raw_syscalls;
 
         if (trace->trace_syscalls)
                 perf_evlist__add_vfs_getname(evlist);
@@ -2210,7 +2210,8 @@ out:
         char errbuf[BUFSIZ];
 
 out_error_tp:
-        debugfs__strerror_open(errno, errbuf, sizeof(errbuf));
+out_error_raw_syscalls:
+        debugfs__strerror_open(errno, errbuf, sizeof(errbuf), "tracing/events/raw_syscalls");
         goto out_error;
 
 out_error_mmap: