[LTP] [PATCH v1] cpuset_memory_test.c: Use $TMPDIR as prefix for HUGEPAGE file path

[Wei Gao]

Test case will fail with following error if running operation system
which force root path read ONLY.

mkdir: cannot create directory ‘/hugetlb’: Read-only file system

Signed-off-by: Wei Gao <wegao@suse.com>
---
 .../cpuset_memory_test/cpuset_memory_test.c      | 11 ++++++++---
 .../cpuset_memory_test/cpuset_memory_testset.sh  | 16 ++++++++--------
 2 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/testcases/kernel/controllers/cpuset/cpuset_memory_test/cpuset_memory_test.c b/testcases/kernel/controllers/cpuset/cpuset_memory_test/cpuset_memory_test.c
index 9912d8d6a..73770fd3c 100644
--- a/testcases/kernel/controllers/cpuset/cpuset_memory_test/cpuset_memory_test.c
+++ b/testcases/kernel/controllers/cpuset/cpuset_memory_test/cpuset_memory_test.c
@@ -177,9 +177,14 @@ void mmap_file(int flag_allocated)
 	static int fd_hugepage;
 	int fd_tmp;
 
+	char path[100];
+	char *tmpdir = getenv("TMPDIR");
+
+	sprintf(path, "%s%s", tmpdir, FILE_HUGEPAGE);
+
 	if (!flag_allocated) {
 		if (opt_hugepage) {
-			fd_hugepage = open(FILE_HUGEPAGE,
+			fd_hugepage = open(path,
 					   O_CREAT | O_RDWR, 0755);
 			if (fd_hugepage < 0)
 				err(1, "open hugepage file failed");
@@ -191,7 +196,7 @@ void mmap_file(int flag_allocated)
 			 MAP_SHARED, fd_tmp, 0);
 		if (p == MAP_FAILED) {
 			if (opt_hugepage)
-				unlink(FILE_HUGEPAGE);
+				unlink(path);
 			err(1, "mmap(file) failed");
 		}
 		touch_memory_and_echo_node(p, memsize);
@@ -201,7 +206,7 @@ void mmap_file(int flag_allocated)
 
 		if (opt_hugepage) {
 			close(fd_hugepage);
-			unlink(FILE_HUGEPAGE);
+			unlink(path);
 		}
 	}
 }
diff --git a/testcases/kernel/controllers/cpuset/cpuset_memory_test/cpuset_memory_testset.sh b/testcases/kernel/controllers/cpuset/cpuset_memory_test/cpuset_memory_testset.sh
index c1e7cea8f..b63425088 100755
--- a/testcases/kernel/controllers/cpuset/cpuset_memory_test/cpuset_memory_testset.sh
+++ b/testcases/kernel/controllers/cpuset/cpuset_memory_test/cpuset_memory_testset.sh
@@ -175,8 +175,8 @@ test6()
 		return 0
 	fi
 
-	mkdir /hugetlb
-	mount -t hugetlbfs none /hugetlb
+	mkdir ${TMPDIR}/hugetlb
+	mount -t hugetlbfs none ${TMPDIR}/hugetlb
 
 	save_nr_hugepages=$(cat /proc/sys/vm/nr_hugepages)
 	echo $((2*$nr_mems)) > /proc/sys/vm/nr_hugepages
@@ -184,8 +184,8 @@ test6()
 	cpuset_memory_test --mmap-file --hugepage -s $HUGEPAGESIZE >"$MEMORY_RESULT" &
 	simple_getresult $! "$CPUSET/0"
 
-	umount /hugetlb
-	rmdir /hugetlb
+	umount ${TMPDIR}/hugetlb
+	rmdir ${TMPDIR}/hugetlb
 
 	echo $save_nr_hugepages > /proc/sys/vm/nr_hugepages
 	if [ $(cat /proc/sys/vm/nr_hugepages) -ne $save_nr_hugepages ]; then
@@ -214,8 +214,8 @@ test7()
 		return 0
 	fi
 
-	mkdir /hugetlb
-	mount -t hugetlbfs none /hugetlb
+	mkdir ${TMPDIR}/hugetlb
+	mount -t hugetlbfs none ${TMPDIR}/hugetlb
 
 	save_nr_hugepages=$(cat /proc/sys/vm/nr_hugepages)
 	echo $((2*$nr_mems)) > /proc/sys/vm/nr_hugepages
@@ -223,8 +223,8 @@ test7()
 	cpuset_memory_test --shm --hugepage -s $HUGEPAGESIZE --key=7 >"$MEMORY_RESULT" &
 	simple_getresult $! "$CPUSET/0"
 
-	umount /hugetlb
-	rmdir /hugetlb
+	umount ${TMPDIR}/hugetlb
+	rmdir ${TMPDIR}/hugetlb
 
 	echo $save_nr_hugepages > /proc/sys/vm/nr_hugepages
 	if [ $(cat /proc/sys/vm/nr_hugepages) -ne $save_nr_hugepages ]; then
-- 
2.35.3