linux-kernel - [tip:perf/core] perf data: Make check

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Message-ID: <tip-5021fc4e8c7c3be6f8735eff76fb2520485fcec4@git.kernel.org>
Date:   Thu, 28 Feb 2019 00:02:06 -0800
From:   tip-bot for Jiri Olsa <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     adrian.hunter@...el.com, hpa@...or.com, jolsa@...nel.org,
        tglx@...utronix.de, alexey.budankov@...ux.intel.com,
        peterz@...radead.org, mingo@...nel.org, eranian@...gle.com,
        namhyung@...nel.org, ak@...ux.intel.com, acme@...hat.com,
        alexander.shishkin@...ux.intel.com, linux-kernel@...r.kernel.org
Subject: [tip:perf/core] perf data: Make check_backup work over directories

Commit-ID:  5021fc4e8c7c3be6f8735eff76fb2520485fcec4
Gitweb:     https://git.kernel.org/tip/5021fc4e8c7c3be6f8735eff76fb2520485fcec4
Author:     Jiri Olsa <jolsa@...nel.org>
AuthorDate: Sun, 24 Feb 2019 20:06:42 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 25 Feb 2019 10:35:19 -0300

perf data: Make check_backup work over directories

Change check_backup() to call rm_rf_perf_data() instead of unlink() to
work over directory paths.

Also move the call earlier in the code, before we fork for file/dir, so
it can backup also directory data.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Alexey Budankov <alexey.budankov@...ux.intel.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/r/20190224190656.30163-7-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/data.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
index e16d06ed1100..bbf9a299615e 100644
--- a/tools/perf/util/data.c
+++ b/tools/perf/util/data.c
@@ -37,12 +37,15 @@ static int check_backup(struct perf_data *data)
 {
 	struct stat st;
 
+	if (perf_data__is_read(data))
+		return 0;
+
 	if (!stat(data->path, &st) && st.st_size) {
 		/* TODO check errors properly */
 		char oldname[PATH_MAX];
 		snprintf(oldname, sizeof(oldname), "%s.old",
 			 data->path);
-		unlink(oldname);
+		rm_rf_perf_data(oldname);
 		rename(data->path, oldname);
 	}
 
@@ -95,9 +98,6 @@ static int open_file_write(struct perf_data *data)
 	int fd;
 	char sbuf[STRERR_BUFSIZE];
 
-	if (check_backup(data))
-		return -1;
-
 	fd = open(data->file.path, O_CREAT|O_RDWR|O_TRUNC|O_CLOEXEC,
 		  S_IRUSR|S_IWUSR);
 
@@ -141,6 +141,9 @@ int perf_data__open(struct perf_data *data)
 	if (!data->path)
 		data->path = "perf.data";
 
+	if (check_backup(data))
+		return -1;
+
 	return open_file_dup(data);
 }