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Message-Id: <1422294449-12735-20-git-send-email-acme@kernel.org>
Date: Mon, 26 Jan 2015 14:47:22 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Borislav Petkov <bp@...e.de>, David Ahern <dsahern@...il.com>,
Don Zickus <dzickus@...hat.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Jiri Olsa <jolsa@...hat.com>,
Namhyung Kim <namhyung@...nel.org>,
Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 19/26] tools lib fs: Adopt debugfs open strerrno method
From: Arnaldo Carvalho de Melo <acme@...hat.com>
As this is not specific to an evlist and may be used with other tools.
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-a9up9mivx1pzdf5tqrqsx62d@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
tools/perf/util/include/asm/hash.h
---
tools/lib/api/fs/debugfs.c | 27 +++++++++++++++++++++++++++
tools/lib/api/fs/debugfs.h | 2 ++
tools/perf/builtin-trace.c | 11 +++++++++--
tools/perf/util/evlist.c | 27 ---------------------------
tools/perf/util/evlist.h | 1 -
5 files changed, 38 insertions(+), 30 deletions(-)
diff --git a/tools/lib/api/fs/debugfs.c b/tools/lib/api/fs/debugfs.c
index 86ea2d7b8845..fb700eed61c2 100644
--- a/tools/lib/api/fs/debugfs.c
+++ b/tools/lib/api/fs/debugfs.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
@@ -98,3 +99,29 @@ char *debugfs_mount(const char *mountpoint)
out:
return debugfs_mountpoint;
}
+
+int debugfs__strerror_open(int err, char *buf, size_t size)
+{
+ char sbuf[128];
+
+ switch (err) {
+ case ENOENT:
+ snprintf(buf, size, "%s",
+ "Error:\tUnable to find debugfs\n"
+ "Hint:\tWas your kernel compiled with debugfs support?\n"
+ "Hint:\tIs the debugfs filesystem mounted?\n"
+ "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'");
+ break;
+ case EACCES:
+ snprintf(buf, size,
+ "Error:\tNo permissions to read %s/tracing/events/raw_syscalls\n"
+ "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n",
+ debugfs_mountpoint, debugfs_mountpoint);
+ break;
+ default:
+ snprintf(buf, size, "%s", strerror_r(err, sbuf, sizeof(sbuf)));
+ break;
+ }
+
+ return 0;
+}
diff --git a/tools/lib/api/fs/debugfs.h b/tools/lib/api/fs/debugfs.h
index f19d3df9609d..afa5043fec61 100644
--- a/tools/lib/api/fs/debugfs.h
+++ b/tools/lib/api/fs/debugfs.h
@@ -26,4 +26,6 @@ char *debugfs_mount(const char *mountpoint);
extern char debugfs_mountpoint[];
+int debugfs__strerror_open(int err, char *buf, size_t size);
+
#endif /* __API_DEBUGFS_H__ */
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 258f6550c736..2f82dd78b086 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2062,8 +2062,15 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
perf_evlist__add_vfs_getname(evlist);
if ((trace->trace_pgfaults & TRACE_PFMAJ) &&
- perf_evlist__add_pgfault(evlist, PERF_COUNT_SW_PAGE_FAULTS_MAJ))
+ perf_evlist__add_pgfault(evlist, PERF_COUNT_SW_PAGE_FAULTS_MAJ)) {
+ /*
+ * FIXME: This one needs better error handling, as by now we
+ * already checked that debugfs is mounted and that we have access to it,
+ * so probably the case is that something is busted wrt this specific
+ * software event, ditto for the next gotos to out_error_tp...
+ */
goto out_error_tp;
+ }
if ((trace->trace_pgfaults & TRACE_PFMIN) &&
perf_evlist__add_pgfault(evlist, PERF_COUNT_SW_PAGE_FAULTS_MIN))
@@ -2203,7 +2210,7 @@ out:
char errbuf[BUFSIZ];
out_error_tp:
- perf_evlist__strerror_tp(evlist, errno, errbuf, sizeof(errbuf));
+ debugfs__strerror_open(errno, errbuf, sizeof(errbuf));
goto out_error;
out_error_mmap:
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 2e507b5025a3..28b8ce86bf12 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1436,33 +1436,6 @@ size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp)
return printed + fprintf(fp, "\n");
}
-int perf_evlist__strerror_tp(struct perf_evlist *evlist __maybe_unused,
- int err, char *buf, size_t size)
-{
- char sbuf[128];
-
- switch (err) {
- case ENOENT:
- scnprintf(buf, size, "%s",
- "Error:\tUnable to find debugfs\n"
- "Hint:\tWas your kernel compiled with debugfs support?\n"
- "Hint:\tIs the debugfs filesystem mounted?\n"
- "Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'");
- break;
- case EACCES:
- scnprintf(buf, size,
- "Error:\tNo permissions to read %s/tracing/events/raw_syscalls\n"
- "Hint:\tTry 'sudo mount -o remount,mode=755 %s'\n",
- debugfs_mountpoint, debugfs_mountpoint);
- break;
- default:
- scnprintf(buf, size, "%s", strerror_r(err, sbuf, sizeof(sbuf)));
- break;
- }
-
- return 0;
-}
-
int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused,
int err, char *buf, size_t size)
{
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 0ba93f67ab94..c94a9e03ecf1 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -183,7 +183,6 @@ static inline struct perf_evsel *perf_evlist__last(struct perf_evlist *evlist)
size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp);
-int perf_evlist__strerror_tp(struct perf_evlist *evlist, int err, char *buf, size_t size);
int perf_evlist__strerror_open(struct perf_evlist *evlist, int err, char *buf, size_t size);
int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size);
--
1.9.3
--
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