[LTP] [PATCH v3 3/7] Hugetlb: Migrating libhugetlbfs directio

[Tarun Sahu]

Migrating the libhugetlbfs/testcases/direct.c test

Test Description: This Test perform Direct Write/Read from/To hugetlbfs
file which is mapped to process address space. The test is checking if it
succeeds and data written or read is not corrupted.

Signed-off-by: Tarun Sahu <tsahu@linux.ibm.com>
---
 runtest/hugetlb                               |  1 +
 testcases/kernel/mem/.gitignore               |  1 +
 .../kernel/mem/hugetlb/hugemmap/hugemmap11.c  | 87 +++++++++++++++++++
 3 files changed, 89 insertions(+)
 create mode 100644 testcases/kernel/mem/hugetlb/hugemmap/hugemmap11.c

diff --git a/runtest/hugetlb b/runtest/hugetlb
index 8a56d52a3..b9ee7227d 100644
--- a/runtest/hugetlb
+++ b/runtest/hugetlb
@@ -7,6 +7,7 @@ hugemmap07 hugemmap07
 hugemmap08 hugemmap08
 hugemmap09 hugemmap09
 hugemmap10 hugemmap10
+hugemmap11 hugemmap11
 hugemmap05_1 hugemmap05 -m
 hugemmap05_2 hugemmap05 -s
 hugemmap05_3 hugemmap05 -s -m
diff --git a/testcases/kernel/mem/.gitignore b/testcases/kernel/mem/.gitignore
index e7def68cb..3e64b67be 100644
--- a/testcases/kernel/mem/.gitignore
+++ b/testcases/kernel/mem/.gitignore
@@ -8,6 +8,7 @@
 /hugetlb/hugemmap/hugemmap08
 /hugetlb/hugemmap/hugemmap09
 /hugetlb/hugemmap/hugemmap10
+/hugetlb/hugemmap/hugemmap11
 /hugetlb/hugeshmat/hugeshmat01
 /hugetlb/hugeshmat/hugeshmat02
 /hugetlb/hugeshmat/hugeshmat03
diff --git a/testcases/kernel/mem/hugetlb/hugemmap/hugemmap11.c b/testcases/kernel/mem/hugetlb/hugemmap/hugemmap11.c
new file mode 100644
index 000000000..48ecfe9d8
--- /dev/null
+++ b/testcases/kernel/mem/hugetlb/hugemmap/hugemmap11.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/*
+ * Copyright (C) 2005-2006 IBM Corporation.
+ * Author: David Gibson & Adam Litke
+ */
+
+/*\
+ * [Description]
+ *
+ * This Test perform Direct Write/Read from/To hugetlbfs file
+ * which is mapped to process address space. The test is checking if it
+ * succeeds and data written or read is not corrupted.
+ *
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <sys/mount.h>
+#include <limits.h>
+#include <sys/param.h>
+#include <sys/types.h>
+
+#include "hugetlb.h"
+
+#define P0 "ffffffff"
+#define IOSZ 4096
+#define NORMAL_PATH ""
+#define MNTPOINT "hugetlbfs/"
+
+static long hpage_size;
+static int fd = -1, nfd = -1;
+
+static void run_test(void)
+{
+	void *p;
+	char buf[IOSZ] __attribute__((aligned(IOSZ)));
+
+	fd = tst_creat_unlinked(MNTPOINT, 0);
+	nfd = tst_creat_unlinked(NORMAL_PATH, O_DIRECT);
+	p = SAFE_MMAP(NULL, hpage_size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
+	memcpy(p, P0, 8);
+
+	SAFE_WRITE(1, nfd, p, IOSZ);
+	SAFE_LSEEK(nfd, 0, SEEK_SET);
+
+	SAFE_READ(1, nfd, buf, IOSZ);
+	if (memcmp(P0, buf, 8)) {
+		tst_res(TFAIL, "Memory mismatch after Direct-IO write");
+		goto cleanup;
+	}
+	SAFE_LSEEK(nfd, 0, SEEK_SET);
+
+	memset(p, 0, IOSZ);
+	SAFE_READ(1, nfd, p, IOSZ);
+
+	if (memcmp(p, P0, 8))
+		tst_res(TFAIL, "Memory mismatch after Direct-IO read");
+	else
+		tst_res(TPASS, "Direct-IO write and read from/to hugepages is successful");
+cleanup:
+	SAFE_MUNMAP(p, hpage_size);
+	SAFE_CLOSE(fd);
+	SAFE_CLOSE(nfd);
+}
+
+static void setup(void)
+{
+	hpage_size = SAFE_READ_MEMINFO(MEMINFO_HPAGE_SIZE)*1024;
+}
+
+static void cleanup(void)
+{
+	if (fd > 0)
+		SAFE_CLOSE(fd);
+	if (nfd > 0)
+		SAFE_CLOSE(nfd);
+}
+
+static struct tst_test test = {
+	.needs_root = 1,
+	.mntpoint = MNTPOINT,
+	.needs_hugetlbfs = 1,
+	.setup = setup,
+	.cleanup = cleanup,
+	.test_all = run_test,
+	.hugepages = {1, TST_NEEDS},
+};
-- 
2.31.1