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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@redhat.com Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.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
Linus Torvalds
parent
47b9012ecd
commit
724978457f
@ -513,6 +513,10 @@ static void mfd_assert_grow_write(int fd)
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static char *buf;
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ssize_t l;
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/* hugetlbfs does not support write */
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if (hugetlbfs_test)
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return;
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buf = malloc(mfd_def_size * 8);
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if (!buf) {
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printf("malloc(%zu) failed: %m\n", mfd_def_size * 8);
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@ -533,6 +537,10 @@ static void mfd_fail_grow_write(int fd)
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static char *buf;
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ssize_t l;
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/* hugetlbfs does not support write */
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if (hugetlbfs_test)
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return;
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buf = malloc(mfd_def_size * 8);
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if (!buf) {
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printf("malloc(%zu) failed: %m\n", mfd_def_size * 8);
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@ -627,18 +635,13 @@ static void test_create(void)
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fd = mfd_assert_new("", 0, MFD_CLOEXEC);
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close(fd);
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if (!hugetlbfs_test) {
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/* verify MFD_ALLOW_SEALING is allowed */
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fd = mfd_assert_new("", 0, MFD_ALLOW_SEALING);
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close(fd);
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/* verify MFD_ALLOW_SEALING is allowed */
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fd = mfd_assert_new("", 0, MFD_ALLOW_SEALING);
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close(fd);
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/* verify MFD_ALLOW_SEALING | MFD_CLOEXEC is allowed */
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fd = mfd_assert_new("", 0, MFD_ALLOW_SEALING | MFD_CLOEXEC);
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close(fd);
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} else {
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/* sealing is not supported on hugetlbfs */
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mfd_fail_new("", MFD_ALLOW_SEALING);
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}
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/* verify MFD_ALLOW_SEALING | MFD_CLOEXEC is allowed */
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fd = mfd_assert_new("", 0, MFD_ALLOW_SEALING | MFD_CLOEXEC);
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close(fd);
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}
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/*
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@ -649,10 +652,6 @@ static void test_basic(void)
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{
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int fd;
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/* hugetlbfs does not contain sealing support */
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if (hugetlbfs_test)
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return;
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printf("%s BASIC\n", MEMFD_STR);
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fd = mfd_assert_new("kern_memfd_basic",
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@ -697,28 +696,6 @@ static void test_basic(void)
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close(fd);
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}
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/*
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* hugetlbfs doesn't support seals or write, so just verify grow and shrink
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* on a hugetlbfs file created via memfd_create.
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*/
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static void test_hugetlbfs_grow_shrink(void)
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{
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int fd;
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printf("%s HUGETLBFS-GROW-SHRINK\n", MEMFD_STR);
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fd = mfd_assert_new("kern_memfd_seal_write",
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mfd_def_size,
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MFD_CLOEXEC);
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mfd_assert_read(fd);
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mfd_assert_write(fd);
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mfd_assert_shrink(fd);
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mfd_assert_grow(fd);
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close(fd);
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}
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/*
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* Test SEAL_WRITE
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* Test whether SEAL_WRITE actually prevents modifications.
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@ -727,13 +704,6 @@ static void test_seal_write(void)
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{
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int fd;
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/*
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* hugetlbfs does not contain sealing or write support. Just test
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* basic grow and shrink via test_hugetlbfs_grow_shrink.
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*/
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if (hugetlbfs_test)
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return test_hugetlbfs_grow_shrink();
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printf("%s SEAL-WRITE\n", MEMFD_STR);
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fd = mfd_assert_new("kern_memfd_seal_write",
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@ -760,10 +730,6 @@ static void test_seal_shrink(void)
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{
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int fd;
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/* hugetlbfs does not contain sealing support */
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if (hugetlbfs_test)
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return;
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printf("%s SEAL-SHRINK\n", MEMFD_STR);
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fd = mfd_assert_new("kern_memfd_seal_shrink",
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@ -790,10 +756,6 @@ static void test_seal_grow(void)
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{
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int fd;
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/* hugetlbfs does not contain sealing support */
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if (hugetlbfs_test)
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return;
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printf("%s SEAL-GROW\n", MEMFD_STR);
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fd = mfd_assert_new("kern_memfd_seal_grow",
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@ -820,10 +782,6 @@ static void test_seal_resize(void)
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{
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int fd;
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/* hugetlbfs does not contain sealing support */
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if (hugetlbfs_test)
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return;
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printf("%s SEAL-RESIZE\n", MEMFD_STR);
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fd = mfd_assert_new("kern_memfd_seal_resize",
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@ -842,32 +800,6 @@ static void test_seal_resize(void)
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close(fd);
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}
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/*
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* hugetlbfs does not support seals. Basic test to dup the memfd created
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* fd and perform some basic operations on it.
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*/
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static void hugetlbfs_dup(char *b_suffix)
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{
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int fd, fd2;
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printf("%s HUGETLBFS-DUP %s\n", MEMFD_STR, b_suffix);
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fd = mfd_assert_new("kern_memfd_share_dup",
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mfd_def_size,
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MFD_CLOEXEC);
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fd2 = mfd_assert_dup(fd);
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mfd_assert_read(fd);
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mfd_assert_write(fd);
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mfd_assert_shrink(fd2);
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mfd_assert_grow(fd2);
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close(fd2);
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close(fd);
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}
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/*
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* Test sharing via dup()
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* Test that seals are shared between dupped FDs and they're all equal.
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@ -876,15 +808,6 @@ static void test_share_dup(char *banner, char *b_suffix)
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{
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int fd, fd2;
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/*
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* hugetlbfs does not contain sealing support. Perform some
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* basic testing on dup'ed fd instead via hugetlbfs_dup.
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*/
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if (hugetlbfs_test) {
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hugetlbfs_dup(b_suffix);
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return;
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}
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printf("%s %s %s\n", MEMFD_STR, banner, b_suffix);
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fd = mfd_assert_new("kern_memfd_share_dup",
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@ -927,10 +850,6 @@ static void test_share_mmap(char *banner, char *b_suffix)
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int fd;
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void *p;
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/* hugetlbfs does not contain sealing support */
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if (hugetlbfs_test)
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return;
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printf("%s %s %s\n", MEMFD_STR, banner, b_suffix);
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fd = mfd_assert_new("kern_memfd_share_mmap",
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@ -955,32 +874,6 @@ static void test_share_mmap(char *banner, char *b_suffix)
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close(fd);
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}
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/*
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* Basic test to make sure we can open the hugetlbfs fd via /proc and
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* perform some simple operations on it.
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*/
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static void hugetlbfs_proc_open(char *b_suffix)
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{
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int fd, fd2;
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printf("%s HUGETLBFS-PROC-OPEN %s\n", MEMFD_STR, b_suffix);
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fd = mfd_assert_new("kern_memfd_share_open",
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mfd_def_size,
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MFD_CLOEXEC);
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fd2 = mfd_assert_open(fd, O_RDWR, 0);
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mfd_assert_read(fd);
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mfd_assert_write(fd);
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mfd_assert_shrink(fd2);
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mfd_assert_grow(fd2);
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close(fd2);
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close(fd);
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}
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/*
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* Test sealing with open(/proc/self/fd/%d)
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* Via /proc we can get access to a separate file-context for the same memfd.
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@ -991,15 +884,6 @@ static void test_share_open(char *banner, char *b_suffix)
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{
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int fd, fd2;
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/*
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* hugetlbfs does not contain sealing support. So test basic
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* functionality of using /proc fd via hugetlbfs_proc_open
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*/
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if (hugetlbfs_test) {
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hugetlbfs_proc_open(b_suffix);
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return;
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}
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printf("%s %s %s\n", MEMFD_STR, banner, b_suffix);
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fd = mfd_assert_new("kern_memfd_share_open",
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@ -1043,10 +927,6 @@ static void test_share_fork(char *banner, char *b_suffix)
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int fd;
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pid_t pid;
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/* hugetlbfs does not contain sealing support */
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if (hugetlbfs_test)
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return;
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printf("%s %s %s\n", MEMFD_STR, banner, b_suffix);
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fd = mfd_assert_new("kern_memfd_share_fork",
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