/*
* libhugetlbfs - Easy use of Linux hugepages
* Copyright (C) 2005-2006 David Gibson & Adam Litke, IBM Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <sys/types.h>
#include <sys/shm.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <hugetlbfs.h>
#include "hugetests.h"
extern int errno;
/* Global Configuration */
#define P "shm-getraw"
#define DESC \
"* This test exercizes the code path which performs raw device IO *\n"\
"* into a large page backed shared memory segment. The specified *\n"\
"* device will be read into a shared memory segment. *"
static int nr_hugepages;
static int shmid = -1;
void cleanup(void)
{
remove_shmid(shmid);
}
int main(int argc, char ** argv)
{
size_t size;
size_t i;
long hpage_size = check_hugepagesize();
volatile char *shmaddr;
char *buffer;
int raw_fd;
test_init(argc, argv);
check_hugetlb_shm_group();
if (argc < 3)
CONFIG("Usage: %s <# pages> <device>", argv[0]);
nr_hugepages = atoi(argv[1]);
verbose_printf("hpage_size is: %ld\n", hpage_size);
buffer = malloc(hpage_size*sizeof(char));
if (!buffer)
FAIL("malloc(%li)", hpage_size*sizeof(char));
raw_fd = open(argv[2], O_RDONLY);
if (!raw_fd)
CONFIG("Cannot open raw device: %s", strerror(errno));
size = hpage_size * nr_hugepages;
verbose_printf("Requesting %zu bytes\n", size);
if ((shmid = shmget(2, size, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W )) < 0)
FAIL("shmget(): %s", strerror(errno));
verbose_printf("shmid: 0x%x\n", shmid);
shmaddr = shmat(shmid, 0, SHM_RND) ;
if (shmaddr == MAP_FAILED)
FAIL("shmat() failed: %s", strerror(errno));
verbose_printf("shmaddr: %p\n", shmaddr);
/* Read a page from device and write to shm segment */
for (i = 0; i < size; i+=hpage_size) {
if (!read(raw_fd, buffer, hpage_size))
FAIL("Can't read from raw device: %s",
strerror(errno));
memcpy((char*)(shmaddr + i), buffer, hpage_size);
}
verbose_printf("Done.\n");
if (shmdt((const void *)shmaddr) != 0)
FAIL("shmdt() failed: %s", strerror(errno));
free(buffer);
PASS();
}