mirror of
https://github.com/xen-project/xen.git
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Igor Druzhinin
143e0c2c2d
The new function repeats the behavior of the first version except it has an extended list of arguments which are subsequently passed to mmap() call. This is needed for QEMU depriviledging. Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com>
114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
/******************************************************************************
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*
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* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/ioctl.h>
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#include "private.h"
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#define PRIVCMD_DEV "/dev/xen/privcmd"
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int osdep_xenforeignmemory_open(xenforeignmemory_handle *fmem)
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{
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int fd = open(PRIVCMD_DEV, O_RDWR|O_CLOEXEC);
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if ( fd == -1 )
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{
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PERROR("Could not obtain handle on privileged command interface "
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PRIVCMD_DEV);
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return -1;
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}
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fmem->fd = fd;
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return 0;
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}
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int osdep_xenforeignmemory_close(xenforeignmemory_handle *fmem)
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{
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int fd = fmem->fd;
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if ( fd == -1 )
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return 0;
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return close(fd);
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}
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void *osdep_xenforeignmemory_map(xenforeignmemory_handle *fmem,
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uint32_t dom, void *addr,
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int prot, int flags, size_t num,
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const xen_pfn_t arr[/*num*/], int err[/*num*/])
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{
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int fd = fmem->fd;
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privcmd_mmapbatch_t ioctlx;
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int rc;
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addr = mmap(addr, num << PAGE_SHIFT, prot, flags | MAP_SHARED, fd, 0);
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if ( addr == MAP_FAILED )
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{
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PERROR("xc_map_foreign_bulk: mmap failed");
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return NULL;
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}
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ioctlx.num = num;
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ioctlx.dom = dom;
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ioctlx.addr = (unsigned long)addr;
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ioctlx.arr = arr;
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ioctlx.err = err;
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rc = ioctl(fd, IOCTL_PRIVCMD_MMAPBATCH, &ioctlx);
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if ( rc < 0 )
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{
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int saved_errno = errno;
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PERROR("xc_map_foreign_bulk: ioctl failed");
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(void)munmap(addr, num << PAGE_SHIFT);
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errno = saved_errno;
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return NULL;
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}
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return addr;
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}
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int osdep_xenforeignmemory_unmap(xenforeignmemory_handle *fmem,
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void *addr, size_t num)
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{
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return munmap(addr, num << PAGE_SHIFT);
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}
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int osdep_xenforeignmemory_restrict(xenforeignmemory_handle *fmem,
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domid_t domid)
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{
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errno = -EOPNOTSUPP;
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return -1;
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}
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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