Merge tag 'pull-riscv-to-apply-20220703-1' of github.com:alistair23/qemu into staging
[qemu.git] / net / vde.c
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu/osdep.h"
25
26 #include <libvdeplug.h>
27
28 #include "net/net.h"
29 #include "clients.h"
30 #include "qemu/option.h"
31 #include "qemu/main-loop.h"
32 #include "qapi/error.h"
33
34 typedef struct VDEState {
35 NetClientState nc;
36 VDECONN *vde;
37 } VDEState;
38
39 static void vde_to_qemu(void *opaque)
40 {
41 VDEState *s = opaque;
42 uint8_t buf[NET_BUFSIZE];
43 int size;
44
45 size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
46 if (size > 0) {
47 qemu_send_packet(&s->nc, buf, size);
48 }
49 }
50
51 static ssize_t vde_receive(NetClientState *nc, const uint8_t *buf, size_t size)
52 {
53 VDEState *s = DO_UPCAST(VDEState, nc, nc);
54 ssize_t ret;
55
56 do {
57 ret = vde_send(s->vde, (const char *)buf, size, 0);
58 } while (ret < 0 && errno == EINTR);
59
60 return ret;
61 }
62
63 static void vde_cleanup(NetClientState *nc)
64 {
65 VDEState *s = DO_UPCAST(VDEState, nc, nc);
66 qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
67 vde_close(s->vde);
68 }
69
70 static NetClientInfo net_vde_info = {
71 .type = NET_CLIENT_DRIVER_VDE,
72 .size = sizeof(VDEState),
73 .receive = vde_receive,
74 .cleanup = vde_cleanup,
75 };
76
77 static int net_vde_init(NetClientState *peer, const char *model,
78 const char *name, const char *sock,
79 int port, const char *group, int mode, Error **errp)
80 {
81 NetClientState *nc;
82 VDEState *s;
83 VDECONN *vde;
84 char *init_group = (char *)group;
85 char *init_sock = (char *)sock;
86
87 struct vde_open_args args = {
88 .port = port,
89 .group = init_group,
90 .mode = mode,
91 };
92
93 vde = vde_open(init_sock, (char *)"QEMU", &args);
94 if (!vde){
95 error_setg_errno(errp, errno, "Could not open vde");
96 return -1;
97 }
98
99 nc = qemu_new_net_client(&net_vde_info, peer, model, name);
100
101 snprintf(nc->info_str, sizeof(nc->info_str), "sock=%s,fd=%d",
102 sock, vde_datafd(vde));
103
104 s = DO_UPCAST(VDEState, nc, nc);
105
106 s->vde = vde;
107
108 qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
109
110 return 0;
111 }
112
113 int net_init_vde(const Netdev *netdev, const char *name,
114 NetClientState *peer, Error **errp)
115 {
116 const NetdevVdeOptions *vde;
117
118 assert(netdev->type == NET_CLIENT_DRIVER_VDE);
119 vde = &netdev->u.vde;
120
121 /* missing optional values have been initialized to "all bits zero" */
122 if (net_vde_init(peer, "vde", name, vde->sock, vde->port, vde->group,
123 vde->has_mode ? vde->mode : 0700, errp) == -1) {
124 return -1;
125 }
126
127 return 0;
128 }