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/******************************************************************************
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* 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;
* version 2.1 of the License.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "xc_private.h"
#include <xen/memory.h>
#include <unistd.h>
#include <fcntl.h>
#include <malloc.h>
int osdep_xenforeignmemory_open(xenforeignmemory_handle *fmem)
{
int flags, saved_errno;
int fd = open("/dev/xen/privcmd", O_RDWR);
if ( fd == -1 )
{
PERROR("Could not obtain handle on privileged command interface");
return -1;
}
/* Although we return the file handle as the 'xc handle' the API
does not specify / guarentee that this integer is in fact
a file handle. Thus we must take responsiblity to ensure
it doesn't propagate (ie leak) outside the process */
if ( (flags = fcntl(fd, F_GETFD)) < 0 )
{
PERROR("Could not get file handle flags");
goto error;
}
flags |= FD_CLOEXEC;
if ( fcntl(fd, F_SETFD, flags) < 0 )
{
PERROR("Could not set file handle flags");
goto error;
}
fmem->fd = fd;
return 0;
error:
saved_errno = errno;
close(fd);
errno = saved_errno;
return -1;
}
int osdep_xenforeignmemory_close(xenforeignmemory_handle *fmem)
{
int fd = fmem->fd;
return close(fd);
}
void *osdep_map_foreign_batch(xenforeignmem_handle *fmem, uint32_t dom,
void *addr, int prot, int flags, xen_pfn_t *arr, int num)
{
int fd = fmem->fd;
privcmd_mmapbatch_t ioctlx;
addr = mmap(addr, num*XC_PAGE_SIZE, prot, flags | MAP_SHARED, fd, 0);
if ( addr == MAP_FAILED )
return NULL;
ioctlx.num=num;
ioctlx.dom=dom;
ioctlx.addr=(unsigned long)addr;
ioctlx.arr=arr;
if ( ioctl(fd, IOCTL_PRIVCMD_MMAPBATCH, &ioctlx) < 0 )
{
int saved_errno = errno;
(void)munmap(addr, num*XC_PAGE_SIZE);
errno = saved_errno;
return NULL;
}
return addr;
}
int osdep_xenforeignmemory_unmap(xenforeignmemory_handle *fmem,
void *addr, size_t num)
{
return munmap(addr, num*XC_PAGE_SIZE);
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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