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memfd-test: run fuse test on hugetlb backend memory

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Link: http://lkml.kernel.org/r/20171107122800.25517-10-marcandre.lureau@redhat.com
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Suggested-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Marc-André Lureau 2018-01-31 16:19:44 -08:00 committed by Linus Torvalds
parent 29f34d1dd6
commit c5c63835e5
3 changed files with 32 additions and 9 deletions
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38
tools/testing/selftests/memfd/fuse_test.c
View File

@ -38,6 +38,8 @@
#define MFD_DEF_SIZE 8192
#define STACK_SIZE 65536
static size_t mfd_def_size = MFD_DEF_SIZE;
static int mfd_assert_new(const char *name, loff_t sz, unsigned int flags)
{
int r, fd;
@ -123,7 +125,7 @@ static void *mfd_assert_mmap_shared(int fd)
void *p;
p = mmap(NULL,
MFD_DEF_SIZE,
mfd_def_size,
PROT_READ | PROT_WRITE,
MAP_SHARED,
fd,
@ -141,7 +143,7 @@ static void *mfd_assert_mmap_private(int fd)
void *p;
p = mmap(NULL,
MFD_DEF_SIZE,
mfd_def_size,
PROT_READ | PROT_WRITE,
MAP_PRIVATE,
fd,
@ -174,7 +176,7 @@ static int sealing_thread_fn(void *arg)
usleep(200000);
/* unmount mapping before sealing to avoid i_mmap_writable failures */
munmap(global_p, MFD_DEF_SIZE);
munmap(global_p, mfd_def_size);
/* Try sealing the global file; expect EBUSY or success. Current
* kernels will never succeed, but in the future, kernels might
@ -224,7 +226,7 @@ static void join_sealing_thread(pid_t pid)
int main(int argc, char **argv)
{
static const char zero[MFD_DEF_SIZE];
char *zero;
int fd, mfd, r;
void *p;
int was_sealed;
@ -235,6 +237,25 @@ int main(int argc, char **argv)
abort();
}
if (argc >= 3) {
if (!strcmp(argv[2], "hugetlbfs")) {
unsigned long hpage_size = default_huge_page_size();
if (!hpage_size) {
printf("Unable to determine huge page size\n");
abort();
}
hugetlbfs_test = 1;
mfd_def_size = hpage_size * 2;
} else {
printf("Unknown option: %s\n", argv[2]);
abort();
}
}
zero = calloc(sizeof(*zero), mfd_def_size);
/* open FUSE memfd file for GUP testing */
printf("opening: %s\n", argv[1]);
fd = open(argv[1], O_RDONLY | O_CLOEXEC);
@ -245,7 +266,7 @@ int main(int argc, char **argv)
/* create new memfd-object */
mfd = mfd_assert_new("kern_memfd_fuse",
MFD_DEF_SIZE,
mfd_def_size,
MFD_CLOEXEC | MFD_ALLOW_SEALING);
/* mmap memfd-object for writing */
@ -264,7 +285,7 @@ int main(int argc, char **argv)
* This guarantees that the receive-buffer is pinned for 1s until the
* data is written into it. The racing ADD_SEALS should thus fail as
* the pages are still pinned. */
r = read(fd, p, MFD_DEF_SIZE);
r = read(fd, p, mfd_def_size);
if (r < 0) {
printf("read() failed: %m\n");
abort();
@ -291,10 +312,10 @@ int main(int argc, char **argv)
* enough to avoid any in-flight writes. */
p = mfd_assert_mmap_private(mfd);
if (was_sealed && memcmp(p, zero, MFD_DEF_SIZE)) {
if (was_sealed && memcmp(p, zero, mfd_def_size)) {
printf("memfd sealed during read() but data not discarded\n");
abort();
} else if (!was_sealed && !memcmp(p, zero, MFD_DEF_SIZE)) {
} else if (!was_sealed && !memcmp(p, zero, mfd_def_size)) {
printf("memfd sealed after read() but data discarded\n");
abort();
}
@ -303,6 +324,7 @@ int main(int argc, char **argv)
close(fd);
printf("fuse: DONE\n");
free(zero);
return 0;
}

2
tools/testing/selftests/memfd/run_fuse_test.sh
View File

@ -10,6 +10,6 @@ set -e
mkdir mnt
./fuse_mnt ./mnt
./fuse_test ./mnt/memfd
./fuse_test ./mnt/memfd $@
fusermount -u ./mnt
rmdir ./mnt

1
tools/testing/selftests/memfd/run_tests.sh
View File

@ -60,6 +60,7 @@ fi
# Run the hugetlbfs test
#
./memfd_test hugetlbfs
./run_fuse_test.sh hugetlbfs
#
# Give back any huge pages allocated for the test