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Paul Durrant
8a2e4970ab
By using a static inline stub in private.h for OS where this functionality is not implemented, the various duplicate stubs in the OS-specific source modules can be avoided. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Reviewed-by: Roger Pau Monné <roger.pau@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com>
112 lines
3.0 KiB
C
112 lines
3.0 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 <unistd.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include "private.h"
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int osdep_xenforeignmemory_open(xenforeignmemory_handle *fmem)
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{
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int flags, saved_errno;
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int fd = open("/kern/xen/privcmd", O_RDWR);
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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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return -1;
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}
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/* Although we return the file handle as the 'xc handle' the API
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does not specify / guarentee that this integer is in fact
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a file handle. Thus we must take responsiblity to ensure
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it doesn't propagate (ie leak) outside the process */
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if ( (flags = fcntl(fd, F_GETFD)) < 0 )
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{
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PERROR("Could not get file handle flags");
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goto error;
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}
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flags |= FD_CLOEXEC;
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if ( fcntl(fd, F_SETFD, flags) < 0 )
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{
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PERROR("Could not set file handle flags");
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goto error;
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}
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fmem->fd = fd;
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return 0;
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error:
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saved_errno = errno;
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close(fd);
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errno = saved_errno;
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return -1;
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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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return close(fd);
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}
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void *osdep_map_foreign_batch(xenforeignmem_handle *fmem, uint32_t dom,
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void *addr, int prot, int flags,
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xen_pfn_t *arr, int 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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addr = mmap(addr, num*XC_PAGE_SIZE, prot, flags | MAP_ANON | MAP_SHARED, -1, 0);
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if ( addr == MAP_FAILED ) {
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PERROR("osdep_map_foreign_batch: 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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if ( ioctl(fd, IOCTL_PRIVCMD_MMAPBATCH, &ioctlx) < 0 )
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{
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int saved_errno = errno;
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PERROR("osdep_map_foreign_batch: ioctl failed");
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(void)munmap(addr, num*XC_PAGE_SIZE);
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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*XC_PAGE_SIZE);
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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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