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Diffstat (limited to 'tools/testing/selftests/memfd/memfd_test.c')
-rw-r--r--tools/testing/selftests/memfd/memfd_test.c212
1 files changed, 33 insertions, 179 deletions
diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
index 132a54f74e88..10baa1652fc2 100644
--- a/tools/testing/selftests/memfd/memfd_test.c
+++ b/tools/testing/selftests/memfd/memfd_test.c
@@ -19,7 +19,10 @@
#include <sys/wait.h>
#include <unistd.h>
+#include "common.h"
+
#define MEMFD_STR "memfd:"
+#define MEMFD_HUGE_STR "memfd-hugetlb:"
#define SHARED_FT_STR "(shared file-table)"
#define MFD_DEF_SIZE 8192
@@ -28,41 +31,8 @@
/*
* Default is not to test hugetlbfs
*/
-static int hugetlbfs_test;
static size_t mfd_def_size = MFD_DEF_SIZE;
-
-/*
- * Copied from mlock2-tests.c
- */
-static unsigned long default_huge_page_size(void)
-{
- unsigned long hps = 0;
- char *line = NULL;
- size_t linelen = 0;
- FILE *f = fopen("/proc/meminfo", "r");
-
- if (!f)
- return 0;
- while (getline(&line, &linelen, f) > 0) {
- if (sscanf(line, "Hugepagesize: %lu kB", &hps) == 1) {
- hps <<= 10;
- break;
- }
- }
-
- free(line);
- fclose(f);
- return hps;
-}
-
-static int sys_memfd_create(const char *name,
- unsigned int flags)
-{
- if (hugetlbfs_test)
- flags |= MFD_HUGETLB;
-
- return syscall(__NR_memfd_create, name, flags);
-}
+static const char *memfd_str = MEMFD_STR;
static int mfd_assert_new(const char *name, loff_t sz, unsigned int flags)
{
@@ -513,6 +483,10 @@ 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 +507,10 @@ 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);
@@ -598,7 +576,7 @@ static void test_create(void)
char buf[2048];
int fd;
- printf("%s CREATE\n", MEMFD_STR);
+ printf("%s CREATE\n", memfd_str);
/* test NULL name */
mfd_fail_new(NULL, 0);
@@ -627,18 +605,13 @@ 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);
}
/*
@@ -649,11 +622,7 @@ static void test_basic(void)
{
int fd;
- /* hugetlbfs does not contain sealing support */
- if (hugetlbfs_test)
- return;
-
- printf("%s BASIC\n", MEMFD_STR);
+ printf("%s BASIC\n", memfd_str);
fd = mfd_assert_new("kern_memfd_basic",
mfd_def_size,
@@ -698,28 +667,6 @@ 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.
*/
@@ -727,14 +674,7 @@ 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);
+ printf("%s SEAL-WRITE\n", memfd_str);
fd = mfd_assert_new("kern_memfd_seal_write",
mfd_def_size,
@@ -760,11 +700,7 @@ 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);
+ printf("%s SEAL-SHRINK\n", memfd_str);
fd = mfd_assert_new("kern_memfd_seal_shrink",
mfd_def_size,
@@ -790,11 +726,7 @@ 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);
+ printf("%s SEAL-GROW\n", memfd_str);
fd = mfd_assert_new("kern_memfd_seal_grow",
mfd_def_size,
@@ -820,11 +752,7 @@ 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);
+ printf("%s SEAL-RESIZE\n", memfd_str);
fd = mfd_assert_new("kern_memfd_seal_resize",
mfd_def_size,
@@ -843,32 +771,6 @@ 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.
*/
@@ -876,16 +778,7 @@ static void test_share_dup(char *banner, char *b_suffix)
{
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);
+ printf("%s %s %s\n", memfd_str, banner, b_suffix);
fd = mfd_assert_new("kern_memfd_share_dup",
mfd_def_size,
@@ -927,11 +820,7 @@ static void test_share_mmap(char *banner, char *b_suffix)
int fd;
void *p;
- /* hugetlbfs does not contain sealing support */
- if (hugetlbfs_test)
- return;
-
- printf("%s %s %s\n", MEMFD_STR, banner, b_suffix);
+ printf("%s %s %s\n", memfd_str, banner, b_suffix);
fd = mfd_assert_new("kern_memfd_share_mmap",
mfd_def_size,
@@ -956,32 +845,6 @@ static void test_share_mmap(char *banner, char *b_suffix)
}
/*
- * 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
@@ -991,16 +854,7 @@ static void test_share_open(char *banner, char *b_suffix)
{
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);
+ printf("%s %s %s\n", memfd_str, banner, b_suffix);
fd = mfd_assert_new("kern_memfd_share_open",
mfd_def_size,
@@ -1043,11 +897,7 @@ static void test_share_fork(char *banner, char *b_suffix)
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);
+ printf("%s %s %s\n", memfd_str, banner, b_suffix);
fd = mfd_assert_new("kern_memfd_share_fork",
mfd_def_size,
@@ -1083,7 +933,11 @@ int main(int argc, char **argv)
}
hugetlbfs_test = 1;
+ memfd_str = MEMFD_HUGE_STR;
mfd_def_size = hpage_size * 2;
+ } else {
+ printf("Unknown option: %s\n", argv[1]);
+ abort();
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 23:18:05 +0000