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
18 #include "private.h"
19
all_restrict_cb(Xentoolcore__Active_Handle * ah,domid_t domid)20 static int all_restrict_cb(Xentoolcore__Active_Handle *ah, domid_t domid) {
21 xencall_handle *xcall = CONTAINER_OF(ah, *xcall, tc_ah);
22 int rc;
23
24 rc = xentoolcore__restrict_by_dup2_null(xcall->buf_fd);
25 if ( rc )
26 goto out;
27
28 rc = xentoolcore__restrict_by_dup2_null(xcall->fd);
29
30 out:
31 return rc;
32 }
33
xencall_open(xentoollog_logger * logger,unsigned open_flags)34 xencall_handle *xencall_open(xentoollog_logger *logger, unsigned open_flags)
35 {
36 xencall_handle *xcall = malloc(sizeof(*xcall));
37 int rc;
38
39 if (!xcall) return NULL;
40
41 xcall->fd = -1;
42 xcall->buf_fd = -1;
43 xcall->tc_ah.restrict_callback = all_restrict_cb;
44 xentoolcore__register_active_handle(&xcall->tc_ah);
45
46 xcall->flags = open_flags;
47 xcall->buffer_cache_nr = 0;
48
49 xcall->buffer_total_allocations = 0;
50 xcall->buffer_total_releases = 0;
51 xcall->buffer_current_allocations = 0;
52 xcall->buffer_maximum_allocations = 0;
53 xcall->buffer_cache_hits = 0;
54 xcall->buffer_cache_misses = 0;
55 xcall->buffer_cache_toobig = 0;
56 xcall->logger = logger;
57 xcall->logger_tofree = NULL;
58
59 if (!xcall->logger) {
60 xcall->logger = xcall->logger_tofree =
61 (xentoollog_logger*)
62 xtl_createlogger_stdiostream(stderr, XTL_PROGRESS, 0);
63 if (!xcall->logger) goto err;
64 }
65
66 rc = osdep_xencall_open(xcall);
67 if ( rc < 0 ) goto err;
68
69 return xcall;
70
71 err:
72 xentoolcore__deregister_active_handle(&xcall->tc_ah);
73 osdep_xencall_close(xcall);
74 xtl_logger_destroy(xcall->logger_tofree);
75 free(xcall);
76 return NULL;
77 }
78
xencall_close(xencall_handle * xcall)79 int xencall_close(xencall_handle *xcall)
80 {
81 int rc;
82
83 if ( !xcall )
84 return 0;
85
86 xentoolcore__deregister_active_handle(&xcall->tc_ah);
87 rc = osdep_xencall_close(xcall);
88 buffer_release_cache(xcall);
89 xtl_logger_destroy(xcall->logger_tofree);
90 free(xcall);
91 return rc;
92 }
93
xencall_fd(xencall_handle * xcall)94 int xencall_fd(xencall_handle *xcall)
95 {
96 return xcall->fd;
97 }
98
xencall0(xencall_handle * xcall,unsigned int op)99 int xencall0(xencall_handle *xcall, unsigned int op)
100 {
101 privcmd_hypercall_t call = {
102 .op = op,
103 };
104
105 return osdep_hypercall(xcall, &call);
106 }
107
xencall1(xencall_handle * xcall,unsigned int op,uint64_t arg1)108 int xencall1(xencall_handle *xcall, unsigned int op,
109 uint64_t arg1)
110 {
111 privcmd_hypercall_t call = {
112 .op = op,
113 .arg = { arg1 },
114 };
115
116 return osdep_hypercall(xcall, &call);
117 }
118
xencall2(xencall_handle * xcall,unsigned int op,uint64_t arg1,uint64_t arg2)119 int xencall2(xencall_handle *xcall, unsigned int op,
120 uint64_t arg1, uint64_t arg2)
121 {
122 privcmd_hypercall_t call = {
123 .op = op,
124 .arg = { arg1, arg2 },
125 };
126
127 return osdep_hypercall(xcall, &call);
128 }
129
xencall3(xencall_handle * xcall,unsigned int op,uint64_t arg1,uint64_t arg2,uint64_t arg3)130 int xencall3(xencall_handle *xcall, unsigned int op,
131 uint64_t arg1, uint64_t arg2, uint64_t arg3)
132 {
133 privcmd_hypercall_t call = {
134 .op = op,
135 .arg = { arg1, arg2, arg3},
136 };
137
138 return osdep_hypercall(xcall, &call);
139 }
140
xencall4(xencall_handle * xcall,unsigned int op,uint64_t arg1,uint64_t arg2,uint64_t arg3,uint64_t arg4)141 int xencall4(xencall_handle *xcall, unsigned int op,
142 uint64_t arg1, uint64_t arg2, uint64_t arg3,
143 uint64_t arg4)
144 {
145 privcmd_hypercall_t call = {
146 .op = op,
147 .arg = { arg1, arg2, arg3, arg4 },
148 };
149
150 return osdep_hypercall(xcall, &call);
151 }
152
xencall5(xencall_handle * xcall,unsigned int op,uint64_t arg1,uint64_t arg2,uint64_t arg3,uint64_t arg4,uint64_t arg5)153 int xencall5(xencall_handle *xcall, unsigned int op,
154 uint64_t arg1, uint64_t arg2, uint64_t arg3,
155 uint64_t arg4, uint64_t arg5)
156 {
157 privcmd_hypercall_t call = {
158 .op = op,
159 .arg = { arg1, arg2, arg3, arg4, arg5 },
160 };
161
162 return osdep_hypercall(xcall, &call);
163 }
164
165 /*
166 * Local variables:
167 * mode: C
168 * c-file-style: "BSD"
169 * c-basic-offset: 4
170 * tab-width: 4
171 * indent-tabs-mode: nil
172 * End:
173 */
174