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

Tarun Sahu
2022-11-15T07:10:00Z

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},