android13/external/ltp/testcases/kernel/syscalls/mbind/mbind04.c

143 lines
2.8 KiB
C

/*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Copyright (c) 2019 Cyril Hrubis <chrubis@suse.cz>
*/
/*
* We are testing mbind() with MPOL_BIND, MPOL_PREFERRED and MPOL_INTERLEAVE
*
* For each node with memory we set its bit in nodemask with set_mempolicy()
* and verify that memory has been faulted accordingly.
*/
#include <errno.h>
#include "config.h"
#ifdef HAVE_NUMA_H
# include <numa.h>
# include <numaif.h>
# include "mbind.h"
#endif
#include "tst_test.h"
#include "tst_numa.h"
#ifdef HAVE_NUMA_V2
static size_t page_size;
static struct tst_nodemap *nodes;
#define PAGES_ALLOCATED 16u
static void setup(void)
{
page_size = getpagesize();
nodes = tst_get_nodemap(TST_NUMA_MEM, 2 * PAGES_ALLOCATED * page_size / 1024);
if (nodes->cnt <= 1)
tst_brk(TCONF, "Test requires at least two NUMA memory nodes");
}
static void cleanup(void)
{
tst_nodemap_free(nodes);
}
static void verify_policy(unsigned int node, int mode, unsigned flag)
{
struct bitmask *bm = numa_allocate_nodemask();
unsigned int i;
void *ptr;
pid_t pid;
unsigned long size = PAGES_ALLOCATED * page_size;
numa_bitmask_setbit(bm, node);
ptr = tst_numa_map(NULL, size);
TEST(mbind(ptr, size, mode, bm->maskp, bm->size + 1, flag));
numa_free_nodemask(bm);
if (TST_RET) {
tst_res(TFAIL | TTERRNO,
"mbind(%s, %s) node %u",
tst_numa_mode_name(mode), mbind_flag_name(flag), node);
return;
}
tst_res(TPASS, "mbind(%s, %s) node %u",
tst_numa_mode_name(mode), mbind_flag_name(flag), node);
const char *prefix = "child: ";
pid = SAFE_FORK();
if (pid) {
prefix = "parent: ";
tst_reap_children();
}
tst_nodemap_reset_counters(nodes);
tst_numa_fault(ptr, size);
tst_nodemap_count_pages(nodes, ptr, size);
tst_numa_unmap(ptr, size);
int fail = 0;
for (i = 0; i < nodes->cnt; i++) {
if (nodes->map[i] == node) {
if (nodes->counters[i] == PAGES_ALLOCATED) {
tst_res(TPASS, "%sNode %u allocated %u",
prefix, node, PAGES_ALLOCATED);
} else {
tst_res(TFAIL, "%sNode %u allocated %u, expected %u",
prefix, node, nodes->counters[i],
PAGES_ALLOCATED);
fail = 1;
}
continue;
}
if (nodes->counters[i]) {
tst_res(TFAIL, "%sNode %u allocated %u, expected 0",
prefix, i, nodes->counters[i]);
fail = 1;
}
}
if (fail)
tst_nodemap_print_counters(nodes);
if (!pid)
exit(0);
}
static const int modes[] = {
MPOL_PREFERRED,
MPOL_BIND,
MPOL_INTERLEAVE,
};
static void verify_mbind(unsigned int n)
{
unsigned int i;
for (i = 0; i < nodes->cnt; i++) {
verify_policy(nodes->map[i], modes[n], 0);
verify_policy(nodes->map[i], modes[n], MPOL_MF_STRICT);
}
}
static struct tst_test test = {
.setup = setup,
.cleanup = cleanup,
.test = verify_mbind,
.tcnt = ARRAY_SIZE(modes),
.forks_child = 1,
};
#else
TST_TEST_TCONF(NUMA_ERROR_MSG);
#endif /* HAVE_NUMA_H */