blob: d95b7360242acde8622bc00acaee7ee6b378e9a1 [file] [log] [blame]
/*
* Check decoding of move_pages syscall.
*
* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "tests.h"
#include <sys/syscall.h>
#ifdef __NR_move_pages
# include <errno.h>
# include <stdio.h>
# include <unistd.h>
# define MAX_STRLEN 3
static void
print_page_array(const void **const pages,
const unsigned long count,
const unsigned int offset)
{
if (!count) {
printf("%s", pages ? "[]" : "NULL");
return;
}
if (count <= offset) {
printf("%p", pages);
return;
}
printf("[");
unsigned long i;
for (i = 0; i < count; ++i) {
if (i)
printf(", ");
if (i + offset < count) {
if (i >= MAX_STRLEN) {
printf("...");
break;
}
} else {
printf("%p", pages + i);
break;
}
const void *const addr = pages[i];
if (addr)
printf("%p", addr);
else
printf("NULL");
}
printf("]");
}
static void
print_node_array(const int *const nodes,
const unsigned long count,
const unsigned int offset)
{
if (!count) {
printf("%s", nodes ? "[]" : "NULL");
return;
}
if (count <= offset) {
printf("%p", nodes);
return;
}
printf("[");
unsigned long i;
for (i = 0; i < count; ++i) {
if (i)
printf(", ");
if (i + offset < count) {
if (i >= MAX_STRLEN) {
printf("...");
break;
}
} else {
printf("%p", nodes + i);
break;
}
printf("%d", nodes[i]);
}
printf("]");
}
static void
print_status_array(const int *const status, const unsigned long count)
{
if (!count) {
printf("%s", status ? "[]" : "NULL");
return;
}
printf("[");
unsigned long i;
for (i = 0; i < count; ++i) {
if (i)
printf(", ");
if (i >= MAX_STRLEN) {
printf("...");
break;
}
if (status[i] >= 0) {
printf("%d", status[i]);
} else {
errno = -status[i];
printf("%s", errno2name());
}
}
printf("]");
}
static void
print_stat_pages(const unsigned long pid, const unsigned long count,
const void **const pages, int *const status)
{
const unsigned long flags = (unsigned long) 0xfacefeed00000002;
long rc = syscall(__NR_move_pages,
pid, count, pages, NULL, status, flags);
if (rc) {
int saved_errno = errno;
printf("move_pages(%d, %lu, ", (int) pid, count);
print_page_array(pages, count, 0);
printf(", NULL, ");
if (count)
printf("%p", status);
else
printf("[]");
errno = saved_errno;
printf(", MPOL_MF_MOVE) = %ld %s (%m)\n",
rc, errno2name());
} else {
printf("move_pages(%d, %lu, ", (int) pid, count);
print_page_array(pages, count, 0);
printf(", NULL, ");
print_status_array(status, count);
printf(", MPOL_MF_MOVE) = 0\n");
}
}
static void
print_move_pages(const unsigned long pid,
unsigned long count,
const unsigned int offset,
const void **const pages,
int *const nodes,
int *const status)
{
const unsigned long flags = (unsigned long) 0xfacefeed00000004;
count += offset;
long rc = syscall(__NR_move_pages,
pid, count, pages, nodes, status, flags);
int saved_errno = errno;
printf("move_pages(%d, %lu, ", (int) pid, count);
print_page_array(pages, count, offset);
printf(", ");
print_node_array(nodes, count, offset);
printf(", ");
if (count)
printf("%p", status);
else
printf("[]");
printf(", MPOL_MF_MOVE_ALL) = ");
if (rc) {
errno = saved_errno;
printf("%ld %s (%m)\n", rc, errno2name());
} else {
puts("0");
}
}
int
main(void)
{
const unsigned long pid =
(unsigned long) 0xfacefeed00000000 | getpid();
unsigned long count = 1;
(void) tail_alloc(1);
const unsigned page_size = get_page_size();
const void *const page = tail_alloc(page_size);
const void *const efault = page + page_size;
const void **pages = tail_alloc(sizeof(*pages));
int *nodes = tail_alloc(sizeof(*nodes));
int *status = tail_alloc(sizeof(*status));
(void) tail_alloc(1);
print_stat_pages(pid, 0, pages, status);
print_move_pages(pid, 0, 0, pages, nodes, status);
print_move_pages(pid, 0, 1, pages + 1, nodes + 1, status + 1);
*pages = page;
print_stat_pages(pid, count, pages, status);
*nodes = 0xdeadbee1;
print_move_pages(pid, count, 0, pages, nodes, status);
print_move_pages(pid, count, 1, pages, nodes, status);
++count;
--status;
*(--pages) = efault;
print_stat_pages(pid, count, pages, status);
*(--nodes) = 0xdeadbee2;
print_move_pages(pid, count, 0, pages, nodes, status);
print_move_pages(pid, count, 1, pages, nodes, status);
++count;
--status;
*(--pages) = nodes;
print_stat_pages(pid, count, pages, status);
*(--nodes) = 0xdeadbee3;
print_move_pages(pid, count, 0, pages, nodes, status);
print_move_pages(pid, count, 1, pages, nodes, status);
++count;
--status;
*(--pages) = status;
print_stat_pages(pid, count, pages, status);
*(--nodes) = 0xdeadbee4;
print_move_pages(pid, count, 0, pages, nodes, status);
print_move_pages(pid, count, 1, pages, nodes, status);
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_move_pages")
#endif