1 /******************************************************************************
2 *
3 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
4 * Use is subject to license terms.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation;
9 * version 2.1 of the License.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; If not, see <http://www.gnu.org/licenses/>.
18 *
19 * Split from xc_solaris.c
20 */
21
22 #include "xc_private.h"
23
24 #include <xen/memory.h>
25 #include <unistd.h>
26 #include <fcntl.h>
27 #include <malloc.h>
28
osdep_xencall_open(xencall_handle * xcall)29 int osdep_xencall_open(xencall_handle *xcall)
30 {
31 int flags, saved_errno;
32 int fd = open("/dev/xen/privcmd", O_RDWR);
33
34 if ( fd == -1 )
35 {
36 PERROR("Could not obtain handle on privileged command interface");
37 return -1;
38 }
39
40 /* Although we return the file handle as the 'xc handle' the API
41 does not specify / guarentee that this integer is in fact
42 a file handle. Thus we must take responsiblity to ensure
43 it doesn't propagate (ie leak) outside the process */
44 if ( (flags = fcntl(fd, F_GETFD)) < 0 )
45 {
46 PERROR("Could not get file handle flags");
47 goto error;
48 }
49 flags |= FD_CLOEXEC;
50 if ( fcntl(fd, F_SETFD, flags) < 0 )
51 {
52 PERROR("Could not set file handle flags");
53 goto error;
54 }
55
56 xcall->fd = fd;
57 return 0;
58
59 error:
60 saved_errno = errno;
61 close(fd);
62 errno = saved_errno;
63 return -1;
64 }
65
osdep_xencall_close(xencall_handle * xcall)66 int osdep_xencall_close(xencall_handle *xcall)
67 {
68 int fd = xcall->fd;
69 return close(fd);
70 }
71
osdep_alloc_hypercall_buffer(xencall_handle * xcall,size_t npages)72 void *osdep_alloc_hypercall_buffer(xencall_handle *xcall, size_t npages)
73 {
74 return memalign(XC_PAGE_SIZE, npages * XC_PAGE_SIZE);
75 }
76
osdep_free_hypercall_buffer(xencall_handle * xcall,void * ptr,size_t npages)77 void osdep_free_hypercall_buffer(xencall_handle *xcall, void *ptr,
78 size_t npages)
79 {
80 free(ptr);
81 }
82
do_xen_hypercall(xencall_handle * xcall,privcmd_hypercall_t * hypercall)83 int do_xen_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall)
84 {
85 int fd = xcall->fd;
86 return ioctl(fd, IOCTL_PRIVCMD_HYPERCALL, hypercall);
87 }
88
xencall_buffers_never_fault(xencall_handle * xcall)89 int xencall_buffers_never_fault(xencall_handle *xcall)
90 {
91 return 1;
92 }
93
94 /*
95 * Local variables:
96 * mode: C
97 * c-file-style: "BSD"
98 * c-basic-offset: 4
99 * tab-width: 4
100 * indent-tabs-mode: nil
101 * End:
102 */
103