The patch titled
Subject: memfd-test: test hugetlbfs sealing
has been added to the -mm tree. Its filename is
memfd-test-test-hugetlbfs-sealing.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/memfd-test-test-hugetlbfs-sealing.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/memfd-test-test-hugetlbfs-sealing.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
Subject: memfd-test: test hugetlbfs sealing
Remove most of the special-casing of hugetlbfs now that sealing
is supported.
Link: http://lkml.kernel.org/r/20171107122800.25517-7-marcandre.lureau@xxxxxxxxxx
Signed-off-by: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: David Herrmann <dh.herrmann@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/memfd/memfd_test.c | 150 +------------------
1 file changed, 15 insertions(+), 135 deletions(-)
diff -puN tools/testing/selftests/memfd/memfd_test.c~memfd-test-test-hugetlbfs-sealing tools/testing/selftests/memfd/memfd_test.c
--- a/tools/testing/selftests/memfd/memfd_test.c~memfd-test-test-hugetlbfs-sealing
+++ a/tools/testing/selftests/memfd/memfd_test.c
@@ -513,6 +513,10 @@ static void mfd_assert_grow_write(int fd
static char *buf;
ssize_t l;
+ /* hugetlbfs does not support write */
+ if (hugetlbfs_test)
+ return;
+
buf = malloc(mfd_def_size * 8);
if (!buf) {
printf("malloc(%zu) failed: %m\n", mfd_def_size * 8);
@@ -533,6 +537,10 @@ static void mfd_fail_grow_write(int fd)
static char *buf;
ssize_t l;
+ /* hugetlbfs does not support write */
+ if (hugetlbfs_test)
+ return;
+
buf = malloc(mfd_def_size * 8);
if (!buf) {
printf("malloc(%zu) failed: %m\n", mfd_def_size * 8);
@@ -627,18 +635,13 @@ static void test_create(void)
fd = mfd_assert_new("", 0, MFD_CLOEXEC);
close(fd);
- if (!hugetlbfs_test) {
- /* verify MFD_ALLOW_SEALING is allowed */
- fd = mfd_assert_new("", 0, MFD_ALLOW_SEALING);
- close(fd);
-
- /* verify MFD_ALLOW_SEALING | MFD_CLOEXEC is allowed */
- fd = mfd_assert_new("", 0, MFD_ALLOW_SEALING | MFD_CLOEXEC);
- close(fd);
- } else {
- /* sealing is not supported on hugetlbfs */
- mfd_fail_new("", MFD_ALLOW_SEALING);
- }
+ /* verify MFD_ALLOW_SEALING is allowed */
+ fd = mfd_assert_new("", 0, MFD_ALLOW_SEALING);
+ close(fd);
+
+ /* verify MFD_ALLOW_SEALING | MFD_CLOEXEC is allowed */
+ fd = mfd_assert_new("", 0, MFD_ALLOW_SEALING | MFD_CLOEXEC);
+ close(fd);
}
/*
@@ -649,10 +652,6 @@ static void test_basic(void)
{
int fd;
- /* hugetlbfs does not contain sealing support */
- if (hugetlbfs_test)
- return;
-
printf("%s BASIC\n", MEMFD_STR);
fd = mfd_assert_new("kern_memfd_basic",
@@ -698,28 +697,6 @@ static void test_basic(void)
}
/*
- * hugetlbfs doesn't support seals or write, so just verify grow and shrink
- * on a hugetlbfs file created via memfd_create.
- */
-static void test_hugetlbfs_grow_shrink(void)
-{
- int fd;
-
- printf("%s HUGETLBFS-GROW-SHRINK\n", MEMFD_STR);
-
- fd = mfd_assert_new("kern_memfd_seal_write",
- mfd_def_size,
- MFD_CLOEXEC);
-
- mfd_assert_read(fd);
- mfd_assert_write(fd);
- mfd_assert_shrink(fd);
- mfd_assert_grow(fd);
-
- close(fd);
-}
-
-/*
* Test SEAL_WRITE
* Test whether SEAL_WRITE actually prevents modifications.
*/
@@ -727,13 +704,6 @@ static void test_seal_write(void)
{
int fd;
- /*
- * hugetlbfs does not contain sealing or write support. Just test
- * basic grow and shrink via test_hugetlbfs_grow_shrink.
- */
- if (hugetlbfs_test)
- return test_hugetlbfs_grow_shrink();
-
printf("%s SEAL-WRITE\n", MEMFD_STR);
fd = mfd_assert_new("kern_memfd_seal_write",
@@ -760,10 +730,6 @@ static void test_seal_shrink(void)
{
int fd;
- /* hugetlbfs does not contain sealing support */
- if (hugetlbfs_test)
- return;
-
printf("%s SEAL-SHRINK\n", MEMFD_STR);
fd = mfd_assert_new("kern_memfd_seal_shrink",
@@ -790,10 +756,6 @@ static void test_seal_grow(void)
{
int fd;
- /* hugetlbfs does not contain sealing support */
- if (hugetlbfs_test)
- return;
-
printf("%s SEAL-GROW\n", MEMFD_STR);
fd = mfd_assert_new("kern_memfd_seal_grow",
@@ -820,10 +782,6 @@ static void test_seal_resize(void)
{
int fd;
- /* hugetlbfs does not contain sealing support */
- if (hugetlbfs_test)
- return;
-
printf("%s SEAL-RESIZE\n", MEMFD_STR);
fd = mfd_assert_new("kern_memfd_seal_resize",
@@ -843,32 +801,6 @@ static void test_seal_resize(void)
}
/*
- * hugetlbfs does not support seals. Basic test to dup the memfd created
- * fd and perform some basic operations on it.
- */
-static void hugetlbfs_dup(char *b_suffix)
-{
- int fd, fd2;
-
- printf("%s HUGETLBFS-DUP %s\n", MEMFD_STR, b_suffix);
-
- fd = mfd_assert_new("kern_memfd_share_dup",
- mfd_def_size,
- MFD_CLOEXEC);
-
- fd2 = mfd_assert_dup(fd);
-
- mfd_assert_read(fd);
- mfd_assert_write(fd);
-
- mfd_assert_shrink(fd2);
- mfd_assert_grow(fd2);
-
- close(fd2);
- close(fd);
-}
-
-/*
* Test sharing via dup()
* Test that seals are shared between dupped FDs and they're all equal.
*/
@@ -876,15 +808,6 @@ static void test_share_dup(char *banner,
{
int fd, fd2;
- /*
- * hugetlbfs does not contain sealing support. Perform some
- * basic testing on dup'ed fd instead via hugetlbfs_dup.
- */
- if (hugetlbfs_test) {
- hugetlbfs_dup(b_suffix);
- return;
- }
-
printf("%s %s %s\n", MEMFD_STR, banner, b_suffix);
fd = mfd_assert_new("kern_memfd_share_dup",
@@ -927,10 +850,6 @@ static void test_share_mmap(char *banner
int fd;
void *p;
- /* hugetlbfs does not contain sealing support */
- if (hugetlbfs_test)
- return;
-
printf("%s %s %s\n", MEMFD_STR, banner, b_suffix);
fd = mfd_assert_new("kern_memfd_share_mmap",
@@ -956,32 +875,6 @@ static void test_share_mmap(char *banner
}
/*
- * Basic test to make sure we can open the hugetlbfs fd via /proc and
- * perform some simple operations on it.
- */
-static void hugetlbfs_proc_open(char *b_suffix)
-{
- int fd, fd2;
-
- printf("%s HUGETLBFS-PROC-OPEN %s\n", MEMFD_STR, b_suffix);
-
- fd = mfd_assert_new("kern_memfd_share_open",
- mfd_def_size,
- MFD_CLOEXEC);
-
- fd2 = mfd_assert_open(fd, O_RDWR, 0);
-
- mfd_assert_read(fd);
- mfd_assert_write(fd);
-
- mfd_assert_shrink(fd2);
- mfd_assert_grow(fd2);
-
- close(fd2);
- close(fd);
-}
-
-/*
* Test sealing with open(/proc/self/fd/%d)
* Via /proc we can get access to a separate file-context for the same memfd.
* This is *not* like dup(), but like a real separate open(). Make sure the
@@ -991,15 +884,6 @@ static void test_share_open(char *banner
{
int fd, fd2;
- /*
- * hugetlbfs does not contain sealing support. So test basic
- * functionality of using /proc fd via hugetlbfs_proc_open
- */
- if (hugetlbfs_test) {
- hugetlbfs_proc_open(b_suffix);
- return;
- }
-
printf("%s %s %s\n", MEMFD_STR, banner, b_suffix);
fd = mfd_assert_new("kern_memfd_share_open",
@@ -1043,10 +927,6 @@ static void test_share_fork(char *banner
int fd;
pid_t pid;
- /* hugetlbfs does not contain sealing support */
- if (hugetlbfs_test)
- return;
-
printf("%s %s %s\n", MEMFD_STR, banner, b_suffix);
fd = mfd_assert_new("kern_memfd_share_fork",
_
Patches currently in -mm which might be from marcandre.lureau@xxxxxxxxxx are
shmem-unexport-shmem_add_seals-shmem_get_seals.patch
shmem-rename-functions-that-are-memfd-related.patch
hugetlb-expose-hugetlbfs_inode_info-in-header.patch
hugetlb-implement-memfd-sealing.patch
shmem-add-sealing-support-to-hugetlb-backed-memfd.patch
memfd-test-test-hugetlbfs-sealing.patch
memfd-test-add-memfd-hugetlb-prefix-when-testing-hugetlbfs.patch
memfd-test-move-common-code-to-a-shared-unit.patch
memfd-test-run-fuse-test-on-hugetlb-backend-memory.patch
mm-page_owner-align-with-pageblock_nr_pages.patch
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