1 /*
2 * This library is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU Lesser General Public
4 * License as published by the Free Software Foundation;
5 * version 2.1 of the License.
6 *
7 * This library is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
10 * Lesser General Public License for more details.
11 *
12 * You should have received a copy of the GNU Lesser General Public
13 * License along with this library; If not, see <http://www.gnu.org/licenses/>.
14 */
15
16 #include <stdlib.h>
17 #include <assert.h>
18 #include <errno.h>
19
20 #include "private.h"
21
all_restrict_cb(Xentoolcore__Active_Handle * ah,domid_t domid)22 static int all_restrict_cb(Xentoolcore__Active_Handle *ah, domid_t domid) {
23 xenforeignmemory_handle *fmem = CONTAINER_OF(ah, *fmem, tc_ah);
24
25 if (fmem->fd < 0)
26 /* just in case */
27 return 0;
28
29 return xenforeignmemory_restrict(fmem, domid);
30 }
31
xenforeignmemory_open(xentoollog_logger * logger,unsigned open_flags)32 xenforeignmemory_handle *xenforeignmemory_open(xentoollog_logger *logger,
33 unsigned open_flags)
34 {
35 xenforeignmemory_handle *fmem = malloc(sizeof(*fmem));
36 int rc;
37
38 if (!fmem) return NULL;
39
40 fmem->fd = -1;
41 fmem->logger = logger;
42 fmem->logger_tofree = NULL;
43
44 fmem->tc_ah.restrict_callback = all_restrict_cb;
45 xentoolcore__register_active_handle(&fmem->tc_ah);
46
47 if (!fmem->logger) {
48 fmem->logger = fmem->logger_tofree =
49 (xentoollog_logger*)
50 xtl_createlogger_stdiostream(stderr, XTL_PROGRESS, 0);
51 if (!fmem->logger) goto err;
52 }
53
54 rc = osdep_xenforeignmemory_open(fmem);
55 if ( rc < 0 ) goto err;
56
57 return fmem;
58
59 err:
60 xentoolcore__deregister_active_handle(&fmem->tc_ah);
61 osdep_xenforeignmemory_close(fmem);
62 xtl_logger_destroy(fmem->logger_tofree);
63 free(fmem);
64 return NULL;
65 }
66
xenforeignmemory_close(xenforeignmemory_handle * fmem)67 int xenforeignmemory_close(xenforeignmemory_handle *fmem)
68 {
69 int rc;
70
71 if ( !fmem )
72 return 0;
73
74 xentoolcore__deregister_active_handle(&fmem->tc_ah);
75 rc = osdep_xenforeignmemory_close(fmem);
76 xtl_logger_destroy(fmem->logger_tofree);
77 free(fmem);
78 return rc;
79 }
80
xenforeignmemory_map2(xenforeignmemory_handle * fmem,uint32_t dom,void * addr,int prot,int flags,size_t num,const xen_pfn_t arr[],int err[])81 void *xenforeignmemory_map2(xenforeignmemory_handle *fmem,
82 uint32_t dom, void *addr,
83 int prot, int flags, size_t num,
84 const xen_pfn_t arr[/*num*/], int err[/*num*/])
85 {
86 void *ret;
87 int *err_to_free = NULL;
88
89 if ( err == NULL )
90 err = err_to_free = malloc(num * sizeof(int));
91
92 if ( err == NULL )
93 return NULL;
94
95 ret = osdep_xenforeignmemory_map(fmem, dom, addr, prot, flags, num, arr, err);
96
97 if ( ret && err_to_free )
98 {
99 int i;
100
101 for ( i = 0 ; i < num ; i++ )
102 {
103 if ( err[i] )
104 {
105 errno = -err[i];
106 (void)osdep_xenforeignmemory_unmap(fmem, ret, num);
107 ret = NULL;
108 break;
109 }
110 }
111 }
112
113 free(err_to_free);
114
115 return ret;
116 }
117
xenforeignmemory_map(xenforeignmemory_handle * fmem,uint32_t dom,int prot,size_t num,const xen_pfn_t arr[],int err[])118 void *xenforeignmemory_map(xenforeignmemory_handle *fmem,
119 uint32_t dom, int prot,
120 size_t num,
121 const xen_pfn_t arr[/*num*/], int err[/*num*/])
122 {
123 return xenforeignmemory_map2(fmem, dom, NULL, prot, 0, num, arr, err);
124 }
125
xenforeignmemory_unmap(xenforeignmemory_handle * fmem,void * addr,size_t num)126 int xenforeignmemory_unmap(xenforeignmemory_handle *fmem,
127 void *addr, size_t num)
128 {
129 return osdep_xenforeignmemory_unmap(fmem, addr, num);
130 }
131
xenforeignmemory_restrict(xenforeignmemory_handle * fmem,domid_t domid)132 int xenforeignmemory_restrict(xenforeignmemory_handle *fmem,
133 domid_t domid)
134 {
135 return osdep_xenforeignmemory_restrict(fmem, domid);
136 }
137
138 /*
139 * Local variables:
140 * mode: C
141 * c-file-style: "BSD"
142 * c-basic-offset: 4
143 * tab-width: 4
144 * indent-tabs-mode: nil
145 * End:
146 */
147