linux-kernel - [tip:perf/core] tools lib fs: Pass filename to debugfs__strerror

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Date:	Wed, 28 Jan 2015 07:09:05 -0800
From:	tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	namhyung@...nel.org, eranian@...gle.com, jolsa@...hat.com,
	mingo@...nel.org, linux-kernel@...r.kernel.org, dzickus@...hat.com,
	tglx@...utronix.de, dsahern@...il.com, fweisbec@...il.com,
	adrian.hunter@...el.com, acme@...hat.com, hpa@...or.com, bp@...e.de
Subject: [tip:perf/core] tools lib fs:
  Pass filename to debugfs__strerror_open

Commit-ID:  801c67b05f55d0cdafcda9fdcbb3da375b03c192
Gitweb:     http://git.kernel.org/tip/801c67b05f55d0cdafcda9fdcbb3da375b03c192
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Thu, 22 Jan 2015 10:52:55 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 22 Jan 2015 11:16:31 -0300

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@...el.com>
Cc: Borislav Petkov <bp@...e.de>
Cc: David Ahern <dsahern@...il.com>
Cc: Don Zickus <dzickus@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-j1jicvwljy5qx1nah4mkmyke@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/lib/api/fs/debugfs.c | 6 +++---
 tools/lib/api/fs/debugfs.h | 2 +-
 tools/perf/builtin-trace.c | 5 +++--
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/tools/lib/api/fs/debugfs.c b/tools/lib/api/fs/debugfs.c
index fb700ee..5e8f391 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 afa5043..a1799ae 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 2f82dd7..684609d 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:
--
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