[LTP] [PATCH v2] syscalls: add syscall syncfs test

Sumit Garg
2019-02-15T07:17:33Z

syncfs01 tests to sync filesystem having large dirty file pages to block
device. Also, it tests all supported filesystems on a test block device.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
---

Changes in v2:
1. Remove unused header file include.
2. Remove redundant tst_device check.
3. Remove redundant flags from tst_test struct.

Fixes: https://github.com/linux-test-project/ltp/issues/294

runtest/syscalls | 2 +
testcases/kernel/syscalls/syncfs/.gitignore | 1 +
testcases/kernel/syscalls/syncfs/Makefile | 8 +++
testcases/kernel/syscalls/syncfs/syncfs01.c | 101 ++++++++++++++++++++++++++++
4 files changed, 112 insertions(+)
create mode 100644 testcases/kernel/syscalls/syncfs/.gitignore
create mode 100644 testcases/kernel/syscalls/syncfs/Makefile
create mode 100644 testcases/kernel/syscalls/syncfs/syncfs01.c

diff --git a/runtest/syscalls b/runtest/syscalls
index 668c87c..9442740 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -1346,6 +1346,8 @@ symlinkat01 symlinkat01
sync01 sync01
sync02 sync02

+syncfs01 syncfs01
+
#testcases for sync_file_range
sync_file_range01 sync_file_range01

diff --git a/testcases/kernel/syscalls/syncfs/.gitignore b/testcases/kernel/syscalls/syncfs/.gitignore
new file mode 100644
index 0000000..6066295
--- /dev/null
+++ b/testcases/kernel/syscalls/syncfs/.gitignore
@@ -0,0 +1 @@
+syncfs01
diff --git a/testcases/kernel/syscalls/syncfs/Makefile b/testcases/kernel/syscalls/syncfs/Makefile
new file mode 100644
index 0000000..3e6c2f4
--- /dev/null
+++ b/testcases/kernel/syscalls/syncfs/Makefile
@@ -0,0 +1,8 @@
+# Copyright (c) 2019 - Linaro Limited. All rights reserved.
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+top_srcdir ?= ../../../..
+
+include $(top_srcdir)/include/mk/testcases.mk
+
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/syscalls/syncfs/syncfs01.c b/testcases/kernel/syscalls/syncfs/syncfs01.c
new file mode 100644
index 0000000..e2d3e80
--- /dev/null
+++ b/testcases/kernel/syscalls/syncfs/syncfs01.c
@@ -0,0 +1,101 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2019 Linaro Limited. All rights reserved.
+ * Author: Sumit Garg <sumit.garg@linaro.org>
+ */
+
+/*
+ * Test syncfs
+ *
+ * It basically tests syncfs() to sync filesystem having large dirty file
+ * pages to block device. Also, it tests all supported filesystems on a test
+ * block device.
+ */
+
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include "tst_test.h"
+#include "lapi/fs.h"
+#include "lapi/stat.h"
+
+#define MNTPOINT "mnt_point"
+#define TST_FILE MNTPOINT"/test"
+#define TST_FILE_SIZE_MB 32
+#define SIZE_MB (1024*1024)
+#define MODE 0644
+
+static char dev_stat_path[1024];
+static char *buffer;
+static int fd;
+
+static void verify_syncfs(void)
+{
+ char nwrite_sec_val[BUFSIZ];
+ int counter;
+ unsigned long prev_write_sec = 0, write_sec = 0;
+
+ SAFE_FILE_SCANF(dev_stat_path, "%*s %*s %*s %*s %*s %*s %s",
+ nwrite_sec_val);
+
+ prev_write_sec = SAFE_STRTOUL(nwrite_sec_val, 0, ULONG_MAX);
+
+ fd = SAFE_OPEN(TST_FILE, O_RDWR|O_CREAT, MODE);
+
+ /* Filling the test file */
+ for (counter = 0; counter < TST_FILE_SIZE_MB; counter++)
+ SAFE_WRITE(1, fd, buffer, SIZE_MB);
+
+ TEST(syncfs(fd));
+ if (TST_RET != 0)
+ tst_brk(TFAIL | TTERRNO, "syncfs(fd) failed");
+
+ SAFE_FILE_SCANF(dev_stat_path, "%*s %*s %*s %*s %*s %*s %s",
+ nwrite_sec_val);
+
+ write_sec = SAFE_STRTOUL(nwrite_sec_val, 0, ULONG_MAX);
+
+ if ((write_sec - prev_write_sec) * 512 >=
+ (TST_FILE_SIZE_MB * SIZE_MB))
+ tst_res(TPASS, "Test filesystem synced to device");
+ else
+ tst_res(TFAIL, "Failed to sync test filesystem to device");
+
+ SAFE_CLOSE(fd);
+}
+
+static void setup(void)
+{
+ struct stat st;
+
+ snprintf(dev_stat_path, sizeof(dev_stat_path), "/sys/block/%s/stat",
+ strrchr(tst_device->dev, '/') + 1);
+
+ if (stat(dev_stat_path, &st) != 0)
+ tst_brk(TCONF, "Test device stat file: %s not found",
+ dev_stat_path);
+
+ buffer = SAFE_MALLOC(SIZE_MB);
+
+ memset(buffer, 0, SIZE_MB);
+}
+
+static void cleanup(void)
+{
+ if (buffer)
+ free(buffer);
+
+ if (fd > 0)
+ SAFE_CLOSE(fd);
+}
+
+static struct tst_test test = {
+ .needs_root = 1,
+ .mount_device = 1,
+ .all_filesystems = 1,
+ .mntpoint = MNTPOINT,
+ .setup = setup,
+ .cleanup = cleanup,
+ .test_all = verify_syncfs,
+};
--
2.7.4