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1 | 5281d757 | Mark McLoughlin | /*
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2 | 5281d757 | Mark McLoughlin | * QEMU System Emulator
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3 | 5281d757 | Mark McLoughlin | *
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4 | 5281d757 | Mark McLoughlin | * Copyright (c) 2003-2008 Fabrice Bellard
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5 | 5281d757 | Mark McLoughlin | * Copyright (c) 2009 Red Hat, Inc.
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6 | 5281d757 | Mark McLoughlin | *
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7 | 5281d757 | Mark McLoughlin | * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 | 5281d757 | Mark McLoughlin | * of this software and associated documentation files (the "Software"), to deal
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9 | 5281d757 | Mark McLoughlin | * in the Software without restriction, including without limitation the rights
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10 | 5281d757 | Mark McLoughlin | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 | 5281d757 | Mark McLoughlin | * copies of the Software, and to permit persons to whom the Software is
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12 | 5281d757 | Mark McLoughlin | * furnished to do so, subject to the following conditions:
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13 | 5281d757 | Mark McLoughlin | *
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14 | 5281d757 | Mark McLoughlin | * The above copyright notice and this permission notice shall be included in
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15 | 5281d757 | Mark McLoughlin | * all copies or substantial portions of the Software.
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16 | 5281d757 | Mark McLoughlin | *
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17 | 5281d757 | Mark McLoughlin | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 | 5281d757 | Mark McLoughlin | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 | 5281d757 | Mark McLoughlin | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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20 | 5281d757 | Mark McLoughlin | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 | 5281d757 | Mark McLoughlin | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 | 5281d757 | Mark McLoughlin | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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23 | 5281d757 | Mark McLoughlin | * THE SOFTWARE.
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24 | 5281d757 | Mark McLoughlin | */
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25 | 5281d757 | Mark McLoughlin | |
26 | 5281d757 | Mark McLoughlin | #include "net/tap.h" |
27 | 5281d757 | Mark McLoughlin | |
28 | 5281d757 | Mark McLoughlin | #include "config-host.h" |
29 | 5281d757 | Mark McLoughlin | |
30 | 5281d757 | Mark McLoughlin | #include <sys/ioctl.h> |
31 | 5281d757 | Mark McLoughlin | #include <sys/stat.h> |
32 | 5281d757 | Mark McLoughlin | #include <sys/wait.h> |
33 | 71f4effc | Alexander Graf | #include <sys/socket.h> |
34 | 5281d757 | Mark McLoughlin | #include <net/if.h> |
35 | 5281d757 | Mark McLoughlin | |
36 | 5281d757 | Mark McLoughlin | #include "net.h" |
37 | 5281d757 | Mark McLoughlin | #include "sysemu.h" |
38 | 5281d757 | Mark McLoughlin | #include "qemu-char.h" |
39 | 5281d757 | Mark McLoughlin | #include "qemu-common.h" |
40 | 2f792016 | Markus Armbruster | #include "qemu-error.h" |
41 | 5281d757 | Mark McLoughlin | |
42 | 5281d757 | Mark McLoughlin | #include "net/tap-linux.h" |
43 | 5281d757 | Mark McLoughlin | |
44 | 82b0d80e | Michael S. Tsirkin | #include "hw/vhost_net.h" |
45 | 82b0d80e | Michael S. Tsirkin | |
46 | 5281d757 | Mark McLoughlin | /* Maximum GSO packet size (64k) plus plenty of room for
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47 | 5281d757 | Mark McLoughlin | * the ethernet and virtio_net headers
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48 | 5281d757 | Mark McLoughlin | */
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49 | 5281d757 | Mark McLoughlin | #define TAP_BUFSIZE (4096 + 65536) |
50 | 5281d757 | Mark McLoughlin | |
51 | 5281d757 | Mark McLoughlin | typedef struct TAPState { |
52 | 3e35ba93 | Mark McLoughlin | VLANClientState nc; |
53 | 5281d757 | Mark McLoughlin | int fd;
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54 | 5281d757 | Mark McLoughlin | char down_script[1024]; |
55 | 5281d757 | Mark McLoughlin | char down_script_arg[128]; |
56 | 5281d757 | Mark McLoughlin | uint8_t buf[TAP_BUFSIZE]; |
57 | 5281d757 | Mark McLoughlin | unsigned int read_poll : 1; |
58 | 5281d757 | Mark McLoughlin | unsigned int write_poll : 1; |
59 | 5281d757 | Mark McLoughlin | unsigned int using_vnet_hdr : 1; |
60 | 5281d757 | Mark McLoughlin | unsigned int has_ufo: 1; |
61 | 82b0d80e | Michael S. Tsirkin | VHostNetState *vhost_net; |
62 | ef4252b1 | Michael S. Tsirkin | unsigned host_vnet_hdr_len;
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63 | 5281d757 | Mark McLoughlin | } TAPState; |
64 | 5281d757 | Mark McLoughlin | |
65 | 5281d757 | Mark McLoughlin | static int launch_script(const char *setup_script, const char *ifname, int fd); |
66 | 5281d757 | Mark McLoughlin | |
67 | 5281d757 | Mark McLoughlin | static int tap_can_send(void *opaque); |
68 | 5281d757 | Mark McLoughlin | static void tap_send(void *opaque); |
69 | 5281d757 | Mark McLoughlin | static void tap_writable(void *opaque); |
70 | 5281d757 | Mark McLoughlin | |
71 | 5281d757 | Mark McLoughlin | static void tap_update_fd_handler(TAPState *s) |
72 | 5281d757 | Mark McLoughlin | { |
73 | 5281d757 | Mark McLoughlin | qemu_set_fd_handler2(s->fd, |
74 | 5281d757 | Mark McLoughlin | s->read_poll ? tap_can_send : NULL,
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75 | 5281d757 | Mark McLoughlin | s->read_poll ? tap_send : NULL,
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76 | 5281d757 | Mark McLoughlin | s->write_poll ? tap_writable : NULL,
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77 | 5281d757 | Mark McLoughlin | s); |
78 | 5281d757 | Mark McLoughlin | } |
79 | 5281d757 | Mark McLoughlin | |
80 | 5281d757 | Mark McLoughlin | static void tap_read_poll(TAPState *s, int enable) |
81 | 5281d757 | Mark McLoughlin | { |
82 | 5281d757 | Mark McLoughlin | s->read_poll = !!enable; |
83 | 5281d757 | Mark McLoughlin | tap_update_fd_handler(s); |
84 | 5281d757 | Mark McLoughlin | } |
85 | 5281d757 | Mark McLoughlin | |
86 | 5281d757 | Mark McLoughlin | static void tap_write_poll(TAPState *s, int enable) |
87 | 5281d757 | Mark McLoughlin | { |
88 | 5281d757 | Mark McLoughlin | s->write_poll = !!enable; |
89 | 5281d757 | Mark McLoughlin | tap_update_fd_handler(s); |
90 | 5281d757 | Mark McLoughlin | } |
91 | 5281d757 | Mark McLoughlin | |
92 | 5281d757 | Mark McLoughlin | static void tap_writable(void *opaque) |
93 | 5281d757 | Mark McLoughlin | { |
94 | 5281d757 | Mark McLoughlin | TAPState *s = opaque; |
95 | 5281d757 | Mark McLoughlin | |
96 | 5281d757 | Mark McLoughlin | tap_write_poll(s, 0);
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97 | 5281d757 | Mark McLoughlin | |
98 | 3e35ba93 | Mark McLoughlin | qemu_flush_queued_packets(&s->nc); |
99 | 5281d757 | Mark McLoughlin | } |
100 | 5281d757 | Mark McLoughlin | |
101 | 5281d757 | Mark McLoughlin | static ssize_t tap_write_packet(TAPState *s, const struct iovec *iov, int iovcnt) |
102 | 5281d757 | Mark McLoughlin | { |
103 | 5281d757 | Mark McLoughlin | ssize_t len; |
104 | 5281d757 | Mark McLoughlin | |
105 | 5281d757 | Mark McLoughlin | do {
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106 | 5281d757 | Mark McLoughlin | len = writev(s->fd, iov, iovcnt); |
107 | 5281d757 | Mark McLoughlin | } while (len == -1 && errno == EINTR); |
108 | 5281d757 | Mark McLoughlin | |
109 | 5281d757 | Mark McLoughlin | if (len == -1 && errno == EAGAIN) { |
110 | 5281d757 | Mark McLoughlin | tap_write_poll(s, 1);
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111 | 5281d757 | Mark McLoughlin | return 0; |
112 | 5281d757 | Mark McLoughlin | } |
113 | 5281d757 | Mark McLoughlin | |
114 | 5281d757 | Mark McLoughlin | return len;
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115 | 5281d757 | Mark McLoughlin | } |
116 | 5281d757 | Mark McLoughlin | |
117 | 3e35ba93 | Mark McLoughlin | static ssize_t tap_receive_iov(VLANClientState *nc, const struct iovec *iov, |
118 | 5281d757 | Mark McLoughlin | int iovcnt)
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119 | 5281d757 | Mark McLoughlin | { |
120 | 3e35ba93 | Mark McLoughlin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
121 | 5281d757 | Mark McLoughlin | const struct iovec *iovp = iov; |
122 | 5281d757 | Mark McLoughlin | struct iovec iov_copy[iovcnt + 1]; |
123 | ef4252b1 | Michael S. Tsirkin | struct virtio_net_hdr_mrg_rxbuf hdr = { };
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124 | 5281d757 | Mark McLoughlin | |
125 | ef4252b1 | Michael S. Tsirkin | if (s->host_vnet_hdr_len && !s->using_vnet_hdr) {
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126 | 5281d757 | Mark McLoughlin | iov_copy[0].iov_base = &hdr;
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127 | ef4252b1 | Michael S. Tsirkin | iov_copy[0].iov_len = s->host_vnet_hdr_len;
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128 | 5281d757 | Mark McLoughlin | memcpy(&iov_copy[1], iov, iovcnt * sizeof(*iov)); |
129 | 5281d757 | Mark McLoughlin | iovp = iov_copy; |
130 | 5281d757 | Mark McLoughlin | iovcnt++; |
131 | 5281d757 | Mark McLoughlin | } |
132 | 5281d757 | Mark McLoughlin | |
133 | 5281d757 | Mark McLoughlin | return tap_write_packet(s, iovp, iovcnt);
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134 | 5281d757 | Mark McLoughlin | } |
135 | 5281d757 | Mark McLoughlin | |
136 | 3e35ba93 | Mark McLoughlin | static ssize_t tap_receive_raw(VLANClientState *nc, const uint8_t *buf, size_t size) |
137 | 5281d757 | Mark McLoughlin | { |
138 | 3e35ba93 | Mark McLoughlin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
139 | 5281d757 | Mark McLoughlin | struct iovec iov[2]; |
140 | 5281d757 | Mark McLoughlin | int iovcnt = 0; |
141 | ef4252b1 | Michael S. Tsirkin | struct virtio_net_hdr_mrg_rxbuf hdr = { };
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142 | 5281d757 | Mark McLoughlin | |
143 | ef4252b1 | Michael S. Tsirkin | if (s->host_vnet_hdr_len) {
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144 | 5281d757 | Mark McLoughlin | iov[iovcnt].iov_base = &hdr; |
145 | ef4252b1 | Michael S. Tsirkin | iov[iovcnt].iov_len = s->host_vnet_hdr_len; |
146 | 5281d757 | Mark McLoughlin | iovcnt++; |
147 | 5281d757 | Mark McLoughlin | } |
148 | 5281d757 | Mark McLoughlin | |
149 | 5281d757 | Mark McLoughlin | iov[iovcnt].iov_base = (char *)buf;
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150 | 5281d757 | Mark McLoughlin | iov[iovcnt].iov_len = size; |
151 | 5281d757 | Mark McLoughlin | iovcnt++; |
152 | 5281d757 | Mark McLoughlin | |
153 | 5281d757 | Mark McLoughlin | return tap_write_packet(s, iov, iovcnt);
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154 | 5281d757 | Mark McLoughlin | } |
155 | 5281d757 | Mark McLoughlin | |
156 | 3e35ba93 | Mark McLoughlin | static ssize_t tap_receive(VLANClientState *nc, const uint8_t *buf, size_t size) |
157 | 5281d757 | Mark McLoughlin | { |
158 | 3e35ba93 | Mark McLoughlin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
159 | 5281d757 | Mark McLoughlin | struct iovec iov[1]; |
160 | 5281d757 | Mark McLoughlin | |
161 | ef4252b1 | Michael S. Tsirkin | if (s->host_vnet_hdr_len && !s->using_vnet_hdr) {
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162 | 3e35ba93 | Mark McLoughlin | return tap_receive_raw(nc, buf, size);
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163 | 5281d757 | Mark McLoughlin | } |
164 | 5281d757 | Mark McLoughlin | |
165 | 5281d757 | Mark McLoughlin | iov[0].iov_base = (char *)buf; |
166 | 5281d757 | Mark McLoughlin | iov[0].iov_len = size;
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167 | 5281d757 | Mark McLoughlin | |
168 | 5281d757 | Mark McLoughlin | return tap_write_packet(s, iov, 1); |
169 | 5281d757 | Mark McLoughlin | } |
170 | 5281d757 | Mark McLoughlin | |
171 | 5281d757 | Mark McLoughlin | static int tap_can_send(void *opaque) |
172 | 5281d757 | Mark McLoughlin | { |
173 | 5281d757 | Mark McLoughlin | TAPState *s = opaque; |
174 | 5281d757 | Mark McLoughlin | |
175 | 3e35ba93 | Mark McLoughlin | return qemu_can_send_packet(&s->nc);
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176 | 5281d757 | Mark McLoughlin | } |
177 | 5281d757 | Mark McLoughlin | |
178 | 966ea5ec | Mark McLoughlin | #ifndef __sun__
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179 | 966ea5ec | Mark McLoughlin | ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen) |
180 | 5281d757 | Mark McLoughlin | { |
181 | 5281d757 | Mark McLoughlin | return read(tapfd, buf, maxlen);
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182 | 5281d757 | Mark McLoughlin | } |
183 | 5281d757 | Mark McLoughlin | #endif
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184 | 5281d757 | Mark McLoughlin | |
185 | 3e35ba93 | Mark McLoughlin | static void tap_send_completed(VLANClientState *nc, ssize_t len) |
186 | 5281d757 | Mark McLoughlin | { |
187 | 3e35ba93 | Mark McLoughlin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
188 | 5281d757 | Mark McLoughlin | tap_read_poll(s, 1);
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189 | 5281d757 | Mark McLoughlin | } |
190 | 5281d757 | Mark McLoughlin | |
191 | 5281d757 | Mark McLoughlin | static void tap_send(void *opaque) |
192 | 5281d757 | Mark McLoughlin | { |
193 | 5281d757 | Mark McLoughlin | TAPState *s = opaque; |
194 | 5281d757 | Mark McLoughlin | int size;
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195 | 5281d757 | Mark McLoughlin | |
196 | 5819c918 | Mark McLoughlin | do {
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197 | 5819c918 | Mark McLoughlin | uint8_t *buf = s->buf; |
198 | 5819c918 | Mark McLoughlin | |
199 | 5819c918 | Mark McLoughlin | size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
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200 | 5819c918 | Mark McLoughlin | if (size <= 0) { |
201 | 5819c918 | Mark McLoughlin | break;
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202 | 5819c918 | Mark McLoughlin | } |
203 | 5819c918 | Mark McLoughlin | |
204 | ef4252b1 | Michael S. Tsirkin | if (s->host_vnet_hdr_len && !s->using_vnet_hdr) {
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205 | ef4252b1 | Michael S. Tsirkin | buf += s->host_vnet_hdr_len; |
206 | ef4252b1 | Michael S. Tsirkin | size -= s->host_vnet_hdr_len; |
207 | 5819c918 | Mark McLoughlin | } |
208 | 5819c918 | Mark McLoughlin | |
209 | 3e35ba93 | Mark McLoughlin | size = qemu_send_packet_async(&s->nc, buf, size, tap_send_completed); |
210 | 5819c918 | Mark McLoughlin | if (size == 0) { |
211 | 5819c918 | Mark McLoughlin | tap_read_poll(s, 0);
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212 | 5819c918 | Mark McLoughlin | } |
213 | 3e35ba93 | Mark McLoughlin | } while (size > 0 && qemu_can_send_packet(&s->nc)); |
214 | 5281d757 | Mark McLoughlin | } |
215 | 5281d757 | Mark McLoughlin | |
216 | 3e35ba93 | Mark McLoughlin | int tap_has_ufo(VLANClientState *nc)
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217 | 5281d757 | Mark McLoughlin | { |
218 | 3e35ba93 | Mark McLoughlin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
219 | 5281d757 | Mark McLoughlin | |
220 | 665a3b07 | Mark McLoughlin | assert(nc->info->type == NET_CLIENT_TYPE_TAP); |
221 | 5281d757 | Mark McLoughlin | |
222 | 5281d757 | Mark McLoughlin | return s->has_ufo;
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223 | 5281d757 | Mark McLoughlin | } |
224 | 5281d757 | Mark McLoughlin | |
225 | 3e35ba93 | Mark McLoughlin | int tap_has_vnet_hdr(VLANClientState *nc)
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226 | 5281d757 | Mark McLoughlin | { |
227 | 3e35ba93 | Mark McLoughlin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
228 | 5281d757 | Mark McLoughlin | |
229 | 665a3b07 | Mark McLoughlin | assert(nc->info->type == NET_CLIENT_TYPE_TAP); |
230 | 5281d757 | Mark McLoughlin | |
231 | ef4252b1 | Michael S. Tsirkin | return !!s->host_vnet_hdr_len;
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232 | 5281d757 | Mark McLoughlin | } |
233 | 5281d757 | Mark McLoughlin | |
234 | 445d892f | Michael S. Tsirkin | int tap_has_vnet_hdr_len(VLANClientState *nc, int len) |
235 | 445d892f | Michael S. Tsirkin | { |
236 | 445d892f | Michael S. Tsirkin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
237 | 445d892f | Michael S. Tsirkin | |
238 | 445d892f | Michael S. Tsirkin | assert(nc->info->type == NET_CLIENT_TYPE_TAP); |
239 | 445d892f | Michael S. Tsirkin | |
240 | 445d892f | Michael S. Tsirkin | return tap_probe_vnet_hdr_len(s->fd, len);
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241 | 445d892f | Michael S. Tsirkin | } |
242 | 445d892f | Michael S. Tsirkin | |
243 | 445d892f | Michael S. Tsirkin | void tap_set_vnet_hdr_len(VLANClientState *nc, int len) |
244 | 445d892f | Michael S. Tsirkin | { |
245 | 445d892f | Michael S. Tsirkin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
246 | 445d892f | Michael S. Tsirkin | |
247 | 445d892f | Michael S. Tsirkin | assert(nc->info->type == NET_CLIENT_TYPE_TAP); |
248 | 445d892f | Michael S. Tsirkin | assert(len == sizeof(struct virtio_net_hdr_mrg_rxbuf) || |
249 | 445d892f | Michael S. Tsirkin | len == sizeof(struct virtio_net_hdr)); |
250 | 445d892f | Michael S. Tsirkin | |
251 | 445d892f | Michael S. Tsirkin | tap_fd_set_vnet_hdr_len(s->fd, len); |
252 | 445d892f | Michael S. Tsirkin | s->host_vnet_hdr_len = len; |
253 | 445d892f | Michael S. Tsirkin | } |
254 | 445d892f | Michael S. Tsirkin | |
255 | 3e35ba93 | Mark McLoughlin | void tap_using_vnet_hdr(VLANClientState *nc, int using_vnet_hdr) |
256 | 5281d757 | Mark McLoughlin | { |
257 | 3e35ba93 | Mark McLoughlin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
258 | 5281d757 | Mark McLoughlin | |
259 | 5281d757 | Mark McLoughlin | using_vnet_hdr = using_vnet_hdr != 0;
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260 | 5281d757 | Mark McLoughlin | |
261 | 665a3b07 | Mark McLoughlin | assert(nc->info->type == NET_CLIENT_TYPE_TAP); |
262 | ef4252b1 | Michael S. Tsirkin | assert(!!s->host_vnet_hdr_len == using_vnet_hdr); |
263 | 5281d757 | Mark McLoughlin | |
264 | 5281d757 | Mark McLoughlin | s->using_vnet_hdr = using_vnet_hdr; |
265 | 5281d757 | Mark McLoughlin | } |
266 | 5281d757 | Mark McLoughlin | |
267 | 3e35ba93 | Mark McLoughlin | void tap_set_offload(VLANClientState *nc, int csum, int tso4, |
268 | 5281d757 | Mark McLoughlin | int tso6, int ecn, int ufo) |
269 | 5281d757 | Mark McLoughlin | { |
270 | 3e35ba93 | Mark McLoughlin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
271 | 27a6375d | Michael S. Tsirkin | if (s->fd < 0) { |
272 | 27a6375d | Michael S. Tsirkin | return;
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273 | 27a6375d | Michael S. Tsirkin | } |
274 | 5281d757 | Mark McLoughlin | |
275 | 27a6375d | Michael S. Tsirkin | tap_fd_set_offload(s->fd, csum, tso4, tso6, ecn, ufo); |
276 | 5281d757 | Mark McLoughlin | } |
277 | 5281d757 | Mark McLoughlin | |
278 | 3e35ba93 | Mark McLoughlin | static void tap_cleanup(VLANClientState *nc) |
279 | 5281d757 | Mark McLoughlin | { |
280 | 3e35ba93 | Mark McLoughlin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
281 | 5281d757 | Mark McLoughlin | |
282 | 82b0d80e | Michael S. Tsirkin | if (s->vhost_net) {
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283 | 82b0d80e | Michael S. Tsirkin | vhost_net_cleanup(s->vhost_net); |
284 | 43849424 | Michael S. Tsirkin | s->vhost_net = NULL;
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285 | 82b0d80e | Michael S. Tsirkin | } |
286 | 82b0d80e | Michael S. Tsirkin | |
287 | 3e35ba93 | Mark McLoughlin | qemu_purge_queued_packets(nc); |
288 | 5281d757 | Mark McLoughlin | |
289 | 5281d757 | Mark McLoughlin | if (s->down_script[0]) |
290 | 5281d757 | Mark McLoughlin | launch_script(s->down_script, s->down_script_arg, s->fd); |
291 | 5281d757 | Mark McLoughlin | |
292 | 5281d757 | Mark McLoughlin | tap_read_poll(s, 0);
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293 | 5281d757 | Mark McLoughlin | tap_write_poll(s, 0);
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294 | 5281d757 | Mark McLoughlin | close(s->fd); |
295 | 27a6375d | Michael S. Tsirkin | s->fd = -1;
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296 | 5281d757 | Mark McLoughlin | } |
297 | 5281d757 | Mark McLoughlin | |
298 | ceb69615 | Michael S. Tsirkin | static void tap_poll(VLANClientState *nc, bool enable) |
299 | ceb69615 | Michael S. Tsirkin | { |
300 | ceb69615 | Michael S. Tsirkin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
301 | ceb69615 | Michael S. Tsirkin | tap_read_poll(s, enable); |
302 | ceb69615 | Michael S. Tsirkin | tap_write_poll(s, enable); |
303 | ceb69615 | Michael S. Tsirkin | } |
304 | ceb69615 | Michael S. Tsirkin | |
305 | 95d528a2 | Michael S. Tsirkin | int tap_get_fd(VLANClientState *nc)
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306 | 95d528a2 | Michael S. Tsirkin | { |
307 | 95d528a2 | Michael S. Tsirkin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
308 | 95d528a2 | Michael S. Tsirkin | assert(nc->info->type == NET_CLIENT_TYPE_TAP); |
309 | 95d528a2 | Michael S. Tsirkin | return s->fd;
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310 | 95d528a2 | Michael S. Tsirkin | } |
311 | 95d528a2 | Michael S. Tsirkin | |
312 | 5281d757 | Mark McLoughlin | /* fd support */
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313 | 5281d757 | Mark McLoughlin | |
314 | 3e35ba93 | Mark McLoughlin | static NetClientInfo net_tap_info = {
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315 | 3e35ba93 | Mark McLoughlin | .type = NET_CLIENT_TYPE_TAP, |
316 | 3e35ba93 | Mark McLoughlin | .size = sizeof(TAPState),
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317 | 3e35ba93 | Mark McLoughlin | .receive = tap_receive, |
318 | 3e35ba93 | Mark McLoughlin | .receive_raw = tap_receive_raw, |
319 | 3e35ba93 | Mark McLoughlin | .receive_iov = tap_receive_iov, |
320 | ceb69615 | Michael S. Tsirkin | .poll = tap_poll, |
321 | 3e35ba93 | Mark McLoughlin | .cleanup = tap_cleanup, |
322 | 3e35ba93 | Mark McLoughlin | }; |
323 | 3e35ba93 | Mark McLoughlin | |
324 | 5281d757 | Mark McLoughlin | static TAPState *net_tap_fd_init(VLANState *vlan,
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325 | 5281d757 | Mark McLoughlin | const char *model, |
326 | 5281d757 | Mark McLoughlin | const char *name, |
327 | 5281d757 | Mark McLoughlin | int fd,
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328 | 5281d757 | Mark McLoughlin | int vnet_hdr)
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329 | 5281d757 | Mark McLoughlin | { |
330 | 3e35ba93 | Mark McLoughlin | VLANClientState *nc; |
331 | 5281d757 | Mark McLoughlin | TAPState *s; |
332 | 5281d757 | Mark McLoughlin | |
333 | 3e35ba93 | Mark McLoughlin | nc = qemu_new_net_client(&net_tap_info, vlan, NULL, model, name);
|
334 | 3e35ba93 | Mark McLoughlin | |
335 | 3e35ba93 | Mark McLoughlin | s = DO_UPCAST(TAPState, nc, nc); |
336 | 3e35ba93 | Mark McLoughlin | |
337 | 5281d757 | Mark McLoughlin | s->fd = fd; |
338 | ef4252b1 | Michael S. Tsirkin | s->host_vnet_hdr_len = vnet_hdr ? sizeof(struct virtio_net_hdr) : 0; |
339 | 5281d757 | Mark McLoughlin | s->using_vnet_hdr = 0;
|
340 | 9c282718 | Mark McLoughlin | s->has_ufo = tap_probe_has_ufo(s->fd); |
341 | 3e35ba93 | Mark McLoughlin | tap_set_offload(&s->nc, 0, 0, 0, 0, 0); |
342 | 5281d757 | Mark McLoughlin | tap_read_poll(s, 1);
|
343 | 82b0d80e | Michael S. Tsirkin | s->vhost_net = NULL;
|
344 | 5281d757 | Mark McLoughlin | return s;
|
345 | 5281d757 | Mark McLoughlin | } |
346 | 5281d757 | Mark McLoughlin | |
347 | 5281d757 | Mark McLoughlin | static int launch_script(const char *setup_script, const char *ifname, int fd) |
348 | 5281d757 | Mark McLoughlin | { |
349 | 5281d757 | Mark McLoughlin | int pid, status;
|
350 | 5281d757 | Mark McLoughlin | char *args[3]; |
351 | 5281d757 | Mark McLoughlin | char **parg;
|
352 | 5281d757 | Mark McLoughlin | |
353 | 5281d757 | Mark McLoughlin | /* try to launch network script */
|
354 | 5281d757 | Mark McLoughlin | pid = fork(); |
355 | 5281d757 | Mark McLoughlin | if (pid == 0) { |
356 | 5281d757 | Mark McLoughlin | int open_max = sysconf(_SC_OPEN_MAX), i;
|
357 | 5281d757 | Mark McLoughlin | |
358 | 5281d757 | Mark McLoughlin | for (i = 0; i < open_max; i++) { |
359 | 5281d757 | Mark McLoughlin | if (i != STDIN_FILENO &&
|
360 | 5281d757 | Mark McLoughlin | i != STDOUT_FILENO && |
361 | 5281d757 | Mark McLoughlin | i != STDERR_FILENO && |
362 | 5281d757 | Mark McLoughlin | i != fd) { |
363 | 5281d757 | Mark McLoughlin | close(i); |
364 | 5281d757 | Mark McLoughlin | } |
365 | 5281d757 | Mark McLoughlin | } |
366 | 5281d757 | Mark McLoughlin | parg = args; |
367 | 5281d757 | Mark McLoughlin | *parg++ = (char *)setup_script;
|
368 | 5281d757 | Mark McLoughlin | *parg++ = (char *)ifname;
|
369 | 9678d950 | Blue Swirl | *parg = NULL;
|
370 | 5281d757 | Mark McLoughlin | execv(setup_script, args); |
371 | 5281d757 | Mark McLoughlin | _exit(1);
|
372 | 5281d757 | Mark McLoughlin | } else if (pid > 0) { |
373 | 5281d757 | Mark McLoughlin | while (waitpid(pid, &status, 0) != pid) { |
374 | 5281d757 | Mark McLoughlin | /* loop */
|
375 | 5281d757 | Mark McLoughlin | } |
376 | 5281d757 | Mark McLoughlin | |
377 | 5281d757 | Mark McLoughlin | if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { |
378 | 5281d757 | Mark McLoughlin | return 0; |
379 | 5281d757 | Mark McLoughlin | } |
380 | 5281d757 | Mark McLoughlin | } |
381 | 5281d757 | Mark McLoughlin | fprintf(stderr, "%s: could not launch network script\n", setup_script);
|
382 | 5281d757 | Mark McLoughlin | return -1; |
383 | 5281d757 | Mark McLoughlin | } |
384 | 5281d757 | Mark McLoughlin | |
385 | a7c36ee4 | Corey Bryant | static int recv_fd(int c) |
386 | a7c36ee4 | Corey Bryant | { |
387 | a7c36ee4 | Corey Bryant | int fd;
|
388 | a7c36ee4 | Corey Bryant | uint8_t msgbuf[CMSG_SPACE(sizeof(fd))];
|
389 | a7c36ee4 | Corey Bryant | struct msghdr msg = {
|
390 | a7c36ee4 | Corey Bryant | .msg_control = msgbuf, |
391 | a7c36ee4 | Corey Bryant | .msg_controllen = sizeof(msgbuf),
|
392 | a7c36ee4 | Corey Bryant | }; |
393 | a7c36ee4 | Corey Bryant | struct cmsghdr *cmsg;
|
394 | a7c36ee4 | Corey Bryant | struct iovec iov;
|
395 | a7c36ee4 | Corey Bryant | uint8_t req[1];
|
396 | a7c36ee4 | Corey Bryant | ssize_t len; |
397 | a7c36ee4 | Corey Bryant | |
398 | a7c36ee4 | Corey Bryant | cmsg = CMSG_FIRSTHDR(&msg); |
399 | a7c36ee4 | Corey Bryant | cmsg->cmsg_level = SOL_SOCKET; |
400 | a7c36ee4 | Corey Bryant | cmsg->cmsg_type = SCM_RIGHTS; |
401 | a7c36ee4 | Corey Bryant | cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
|
402 | a7c36ee4 | Corey Bryant | msg.msg_controllen = cmsg->cmsg_len; |
403 | a7c36ee4 | Corey Bryant | |
404 | a7c36ee4 | Corey Bryant | iov.iov_base = req; |
405 | a7c36ee4 | Corey Bryant | iov.iov_len = sizeof(req);
|
406 | a7c36ee4 | Corey Bryant | |
407 | a7c36ee4 | Corey Bryant | msg.msg_iov = &iov; |
408 | a7c36ee4 | Corey Bryant | msg.msg_iovlen = 1;
|
409 | a7c36ee4 | Corey Bryant | |
410 | a7c36ee4 | Corey Bryant | len = recvmsg(c, &msg, 0);
|
411 | a7c36ee4 | Corey Bryant | if (len > 0) { |
412 | a7c36ee4 | Corey Bryant | memcpy(&fd, CMSG_DATA(cmsg), sizeof(fd));
|
413 | a7c36ee4 | Corey Bryant | return fd;
|
414 | a7c36ee4 | Corey Bryant | } |
415 | a7c36ee4 | Corey Bryant | |
416 | a7c36ee4 | Corey Bryant | return len;
|
417 | a7c36ee4 | Corey Bryant | } |
418 | a7c36ee4 | Corey Bryant | |
419 | a7c36ee4 | Corey Bryant | static int net_bridge_run_helper(const char *helper, const char *bridge) |
420 | a7c36ee4 | Corey Bryant | { |
421 | a7c36ee4 | Corey Bryant | sigset_t oldmask, mask; |
422 | a7c36ee4 | Corey Bryant | int pid, status;
|
423 | a7c36ee4 | Corey Bryant | char *args[5]; |
424 | a7c36ee4 | Corey Bryant | char **parg;
|
425 | a7c36ee4 | Corey Bryant | int sv[2]; |
426 | a7c36ee4 | Corey Bryant | |
427 | a7c36ee4 | Corey Bryant | sigemptyset(&mask); |
428 | a7c36ee4 | Corey Bryant | sigaddset(&mask, SIGCHLD); |
429 | a7c36ee4 | Corey Bryant | sigprocmask(SIG_BLOCK, &mask, &oldmask); |
430 | a7c36ee4 | Corey Bryant | |
431 | a7c36ee4 | Corey Bryant | if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) { |
432 | a7c36ee4 | Corey Bryant | return -1; |
433 | a7c36ee4 | Corey Bryant | } |
434 | a7c36ee4 | Corey Bryant | |
435 | a7c36ee4 | Corey Bryant | /* try to launch bridge helper */
|
436 | a7c36ee4 | Corey Bryant | pid = fork(); |
437 | a7c36ee4 | Corey Bryant | if (pid == 0) { |
438 | a7c36ee4 | Corey Bryant | int open_max = sysconf(_SC_OPEN_MAX), i;
|
439 | a7c36ee4 | Corey Bryant | char fd_buf[6+10]; |
440 | a7c36ee4 | Corey Bryant | char br_buf[6+IFNAMSIZ] = {0}; |
441 | a7c36ee4 | Corey Bryant | char helper_cmd[PATH_MAX + sizeof(fd_buf) + sizeof(br_buf) + 15]; |
442 | a7c36ee4 | Corey Bryant | |
443 | a7c36ee4 | Corey Bryant | for (i = 0; i < open_max; i++) { |
444 | a7c36ee4 | Corey Bryant | if (i != STDIN_FILENO &&
|
445 | a7c36ee4 | Corey Bryant | i != STDOUT_FILENO && |
446 | a7c36ee4 | Corey Bryant | i != STDERR_FILENO && |
447 | a7c36ee4 | Corey Bryant | i != sv[1]) {
|
448 | a7c36ee4 | Corey Bryant | close(i); |
449 | a7c36ee4 | Corey Bryant | } |
450 | a7c36ee4 | Corey Bryant | } |
451 | a7c36ee4 | Corey Bryant | |
452 | a7c36ee4 | Corey Bryant | snprintf(fd_buf, sizeof(fd_buf), "%s%d", "--fd=", sv[1]); |
453 | a7c36ee4 | Corey Bryant | |
454 | a7c36ee4 | Corey Bryant | if (strrchr(helper, ' ') || strrchr(helper, '\t')) { |
455 | a7c36ee4 | Corey Bryant | /* assume helper is a command */
|
456 | a7c36ee4 | Corey Bryant | |
457 | a7c36ee4 | Corey Bryant | if (strstr(helper, "--br=") == NULL) { |
458 | a7c36ee4 | Corey Bryant | snprintf(br_buf, sizeof(br_buf), "%s%s", "--br=", bridge); |
459 | a7c36ee4 | Corey Bryant | } |
460 | a7c36ee4 | Corey Bryant | |
461 | a7c36ee4 | Corey Bryant | snprintf(helper_cmd, sizeof(helper_cmd), "%s %s %s %s", |
462 | a7c36ee4 | Corey Bryant | helper, "--use-vnet", fd_buf, br_buf);
|
463 | a7c36ee4 | Corey Bryant | |
464 | a7c36ee4 | Corey Bryant | parg = args; |
465 | a7c36ee4 | Corey Bryant | *parg++ = (char *)"sh"; |
466 | a7c36ee4 | Corey Bryant | *parg++ = (char *)"-c"; |
467 | a7c36ee4 | Corey Bryant | *parg++ = helper_cmd; |
468 | a7c36ee4 | Corey Bryant | *parg++ = NULL;
|
469 | a7c36ee4 | Corey Bryant | |
470 | a7c36ee4 | Corey Bryant | execv("/bin/sh", args);
|
471 | a7c36ee4 | Corey Bryant | } else {
|
472 | a7c36ee4 | Corey Bryant | /* assume helper is just the executable path name */
|
473 | a7c36ee4 | Corey Bryant | |
474 | a7c36ee4 | Corey Bryant | snprintf(br_buf, sizeof(br_buf), "%s%s", "--br=", bridge); |
475 | a7c36ee4 | Corey Bryant | |
476 | a7c36ee4 | Corey Bryant | parg = args; |
477 | a7c36ee4 | Corey Bryant | *parg++ = (char *)helper;
|
478 | a7c36ee4 | Corey Bryant | *parg++ = (char *)"--use-vnet"; |
479 | a7c36ee4 | Corey Bryant | *parg++ = fd_buf; |
480 | a7c36ee4 | Corey Bryant | *parg++ = br_buf; |
481 | a7c36ee4 | Corey Bryant | *parg++ = NULL;
|
482 | a7c36ee4 | Corey Bryant | |
483 | a7c36ee4 | Corey Bryant | execv(helper, args); |
484 | a7c36ee4 | Corey Bryant | } |
485 | a7c36ee4 | Corey Bryant | _exit(1);
|
486 | a7c36ee4 | Corey Bryant | |
487 | a7c36ee4 | Corey Bryant | } else if (pid > 0) { |
488 | a7c36ee4 | Corey Bryant | int fd;
|
489 | a7c36ee4 | Corey Bryant | |
490 | a7c36ee4 | Corey Bryant | close(sv[1]);
|
491 | a7c36ee4 | Corey Bryant | |
492 | a7c36ee4 | Corey Bryant | do {
|
493 | a7c36ee4 | Corey Bryant | fd = recv_fd(sv[0]);
|
494 | a7c36ee4 | Corey Bryant | } while (fd == -1 && errno == EINTR); |
495 | a7c36ee4 | Corey Bryant | |
496 | a7c36ee4 | Corey Bryant | close(sv[0]);
|
497 | a7c36ee4 | Corey Bryant | |
498 | a7c36ee4 | Corey Bryant | while (waitpid(pid, &status, 0) != pid) { |
499 | a7c36ee4 | Corey Bryant | /* loop */
|
500 | a7c36ee4 | Corey Bryant | } |
501 | a7c36ee4 | Corey Bryant | sigprocmask(SIG_SETMASK, &oldmask, NULL);
|
502 | a7c36ee4 | Corey Bryant | if (fd < 0) { |
503 | a7c36ee4 | Corey Bryant | fprintf(stderr, "failed to recv file descriptor\n");
|
504 | a7c36ee4 | Corey Bryant | return -1; |
505 | a7c36ee4 | Corey Bryant | } |
506 | a7c36ee4 | Corey Bryant | |
507 | a7c36ee4 | Corey Bryant | if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { |
508 | a7c36ee4 | Corey Bryant | return fd;
|
509 | a7c36ee4 | Corey Bryant | } |
510 | a7c36ee4 | Corey Bryant | } |
511 | a7c36ee4 | Corey Bryant | fprintf(stderr, "failed to launch bridge helper\n");
|
512 | a7c36ee4 | Corey Bryant | return -1; |
513 | a7c36ee4 | Corey Bryant | } |
514 | a7c36ee4 | Corey Bryant | |
515 | a7c36ee4 | Corey Bryant | int net_init_bridge(QemuOpts *opts, Monitor *mon, const char *name, |
516 | a7c36ee4 | Corey Bryant | VLANState *vlan) |
517 | a7c36ee4 | Corey Bryant | { |
518 | a7c36ee4 | Corey Bryant | TAPState *s; |
519 | a7c36ee4 | Corey Bryant | int fd, vnet_hdr;
|
520 | a7c36ee4 | Corey Bryant | |
521 | a7c36ee4 | Corey Bryant | if (!qemu_opt_get(opts, "br")) { |
522 | a7c36ee4 | Corey Bryant | qemu_opt_set(opts, "br", DEFAULT_BRIDGE_INTERFACE);
|
523 | a7c36ee4 | Corey Bryant | } |
524 | a7c36ee4 | Corey Bryant | if (!qemu_opt_get(opts, "helper")) { |
525 | a7c36ee4 | Corey Bryant | qemu_opt_set(opts, "helper", DEFAULT_BRIDGE_HELPER);
|
526 | a7c36ee4 | Corey Bryant | } |
527 | a7c36ee4 | Corey Bryant | |
528 | a7c36ee4 | Corey Bryant | fd = net_bridge_run_helper(qemu_opt_get(opts, "helper"),
|
529 | a7c36ee4 | Corey Bryant | qemu_opt_get(opts, "br"));
|
530 | a7c36ee4 | Corey Bryant | if (fd == -1) { |
531 | a7c36ee4 | Corey Bryant | return -1; |
532 | a7c36ee4 | Corey Bryant | } |
533 | a7c36ee4 | Corey Bryant | |
534 | a7c36ee4 | Corey Bryant | fcntl(fd, F_SETFL, O_NONBLOCK); |
535 | a7c36ee4 | Corey Bryant | |
536 | a7c36ee4 | Corey Bryant | vnet_hdr = tap_probe_vnet_hdr(fd); |
537 | a7c36ee4 | Corey Bryant | |
538 | a7c36ee4 | Corey Bryant | s = net_tap_fd_init(vlan, "bridge", name, fd, vnet_hdr);
|
539 | a7c36ee4 | Corey Bryant | if (!s) {
|
540 | a7c36ee4 | Corey Bryant | close(fd); |
541 | a7c36ee4 | Corey Bryant | return -1; |
542 | a7c36ee4 | Corey Bryant | } |
543 | a7c36ee4 | Corey Bryant | |
544 | a7c36ee4 | Corey Bryant | snprintf(s->nc.info_str, sizeof(s->nc.info_str), "helper=%s,br=%s", |
545 | a7c36ee4 | Corey Bryant | qemu_opt_get(opts, "helper"), qemu_opt_get(opts, "br")); |
546 | a7c36ee4 | Corey Bryant | |
547 | a7c36ee4 | Corey Bryant | return 0; |
548 | a7c36ee4 | Corey Bryant | } |
549 | a7c36ee4 | Corey Bryant | |
550 | 5281d757 | Mark McLoughlin | static int net_tap_init(QemuOpts *opts, int *vnet_hdr) |
551 | 5281d757 | Mark McLoughlin | { |
552 | 5281d757 | Mark McLoughlin | int fd, vnet_hdr_required;
|
553 | 5281d757 | Mark McLoughlin | char ifname[128] = {0,}; |
554 | 5281d757 | Mark McLoughlin | const char *setup_script; |
555 | 5281d757 | Mark McLoughlin | |
556 | 5281d757 | Mark McLoughlin | if (qemu_opt_get(opts, "ifname")) { |
557 | 5281d757 | Mark McLoughlin | pstrcpy(ifname, sizeof(ifname), qemu_opt_get(opts, "ifname")); |
558 | 5281d757 | Mark McLoughlin | } |
559 | 5281d757 | Mark McLoughlin | |
560 | 5281d757 | Mark McLoughlin | *vnet_hdr = qemu_opt_get_bool(opts, "vnet_hdr", 1); |
561 | 5281d757 | Mark McLoughlin | if (qemu_opt_get(opts, "vnet_hdr")) { |
562 | 5281d757 | Mark McLoughlin | vnet_hdr_required = *vnet_hdr; |
563 | 5281d757 | Mark McLoughlin | } else {
|
564 | 5281d757 | Mark McLoughlin | vnet_hdr_required = 0;
|
565 | 5281d757 | Mark McLoughlin | } |
566 | 5281d757 | Mark McLoughlin | |
567 | 5281d757 | Mark McLoughlin | TFR(fd = tap_open(ifname, sizeof(ifname), vnet_hdr, vnet_hdr_required));
|
568 | 5281d757 | Mark McLoughlin | if (fd < 0) { |
569 | 5281d757 | Mark McLoughlin | return -1; |
570 | 5281d757 | Mark McLoughlin | } |
571 | 5281d757 | Mark McLoughlin | |
572 | 5281d757 | Mark McLoughlin | setup_script = qemu_opt_get(opts, "script");
|
573 | 5281d757 | Mark McLoughlin | if (setup_script &&
|
574 | 5281d757 | Mark McLoughlin | setup_script[0] != '\0' && |
575 | 5281d757 | Mark McLoughlin | strcmp(setup_script, "no") != 0 && |
576 | 5281d757 | Mark McLoughlin | launch_script(setup_script, ifname, fd)) { |
577 | 5281d757 | Mark McLoughlin | close(fd); |
578 | 5281d757 | Mark McLoughlin | return -1; |
579 | 5281d757 | Mark McLoughlin | } |
580 | 5281d757 | Mark McLoughlin | |
581 | 5281d757 | Mark McLoughlin | qemu_opt_set(opts, "ifname", ifname);
|
582 | 5281d757 | Mark McLoughlin | |
583 | 5281d757 | Mark McLoughlin | return fd;
|
584 | 5281d757 | Mark McLoughlin | } |
585 | 5281d757 | Mark McLoughlin | |
586 | 5281d757 | Mark McLoughlin | int net_init_tap(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan) |
587 | 5281d757 | Mark McLoughlin | { |
588 | 5281d757 | Mark McLoughlin | TAPState *s; |
589 | df6c2a0f | Mark McLoughlin | int fd, vnet_hdr = 0; |
590 | a7c36ee4 | Corey Bryant | const char *model; |
591 | 5281d757 | Mark McLoughlin | |
592 | 5281d757 | Mark McLoughlin | if (qemu_opt_get(opts, "fd")) { |
593 | 5281d757 | Mark McLoughlin | if (qemu_opt_get(opts, "ifname") || |
594 | 5281d757 | Mark McLoughlin | qemu_opt_get(opts, "script") ||
|
595 | 5281d757 | Mark McLoughlin | qemu_opt_get(opts, "downscript") ||
|
596 | a7c36ee4 | Corey Bryant | qemu_opt_get(opts, "vnet_hdr") ||
|
597 | a7c36ee4 | Corey Bryant | qemu_opt_get(opts, "helper")) {
|
598 | a7c36ee4 | Corey Bryant | error_report("ifname=, script=, downscript=, vnet_hdr=, "
|
599 | a7c36ee4 | Corey Bryant | "and helper= are invalid with fd=");
|
600 | 5281d757 | Mark McLoughlin | return -1; |
601 | 5281d757 | Mark McLoughlin | } |
602 | 5281d757 | Mark McLoughlin | |
603 | 5281d757 | Mark McLoughlin | fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
|
604 | 5281d757 | Mark McLoughlin | if (fd == -1) { |
605 | 5281d757 | Mark McLoughlin | return -1; |
606 | 5281d757 | Mark McLoughlin | } |
607 | 5281d757 | Mark McLoughlin | |
608 | 5281d757 | Mark McLoughlin | fcntl(fd, F_SETFL, O_NONBLOCK); |
609 | 5281d757 | Mark McLoughlin | |
610 | 5281d757 | Mark McLoughlin | vnet_hdr = tap_probe_vnet_hdr(fd); |
611 | a7c36ee4 | Corey Bryant | |
612 | a7c36ee4 | Corey Bryant | model = "tap";
|
613 | a7c36ee4 | Corey Bryant | |
614 | a7c36ee4 | Corey Bryant | } else if (qemu_opt_get(opts, "helper")) { |
615 | a7c36ee4 | Corey Bryant | if (qemu_opt_get(opts, "ifname") || |
616 | a7c36ee4 | Corey Bryant | qemu_opt_get(opts, "script") ||
|
617 | a7c36ee4 | Corey Bryant | qemu_opt_get(opts, "downscript") ||
|
618 | a7c36ee4 | Corey Bryant | qemu_opt_get(opts, "vnet_hdr")) {
|
619 | a7c36ee4 | Corey Bryant | error_report("ifname=, script=, downscript=, and vnet_hdr= "
|
620 | a7c36ee4 | Corey Bryant | "are invalid with helper=");
|
621 | a7c36ee4 | Corey Bryant | return -1; |
622 | a7c36ee4 | Corey Bryant | } |
623 | a7c36ee4 | Corey Bryant | |
624 | a7c36ee4 | Corey Bryant | fd = net_bridge_run_helper(qemu_opt_get(opts, "helper"),
|
625 | a7c36ee4 | Corey Bryant | DEFAULT_BRIDGE_INTERFACE); |
626 | a7c36ee4 | Corey Bryant | if (fd == -1) { |
627 | a7c36ee4 | Corey Bryant | return -1; |
628 | a7c36ee4 | Corey Bryant | } |
629 | a7c36ee4 | Corey Bryant | |
630 | a7c36ee4 | Corey Bryant | fcntl(fd, F_SETFL, O_NONBLOCK); |
631 | a7c36ee4 | Corey Bryant | |
632 | a7c36ee4 | Corey Bryant | vnet_hdr = tap_probe_vnet_hdr(fd); |
633 | a7c36ee4 | Corey Bryant | |
634 | a7c36ee4 | Corey Bryant | model = "bridge";
|
635 | a7c36ee4 | Corey Bryant | |
636 | 5281d757 | Mark McLoughlin | } else {
|
637 | 5281d757 | Mark McLoughlin | if (!qemu_opt_get(opts, "script")) { |
638 | 5281d757 | Mark McLoughlin | qemu_opt_set(opts, "script", DEFAULT_NETWORK_SCRIPT);
|
639 | 5281d757 | Mark McLoughlin | } |
640 | 5281d757 | Mark McLoughlin | |
641 | 5281d757 | Mark McLoughlin | if (!qemu_opt_get(opts, "downscript")) { |
642 | 5281d757 | Mark McLoughlin | qemu_opt_set(opts, "downscript", DEFAULT_NETWORK_DOWN_SCRIPT);
|
643 | 5281d757 | Mark McLoughlin | } |
644 | 5281d757 | Mark McLoughlin | |
645 | 5281d757 | Mark McLoughlin | fd = net_tap_init(opts, &vnet_hdr); |
646 | 929fe497 | Juergen Lock | if (fd == -1) { |
647 | 929fe497 | Juergen Lock | return -1; |
648 | 929fe497 | Juergen Lock | } |
649 | a7c36ee4 | Corey Bryant | |
650 | a7c36ee4 | Corey Bryant | model = "tap";
|
651 | 5281d757 | Mark McLoughlin | } |
652 | 5281d757 | Mark McLoughlin | |
653 | a7c36ee4 | Corey Bryant | s = net_tap_fd_init(vlan, model, name, fd, vnet_hdr); |
654 | 5281d757 | Mark McLoughlin | if (!s) {
|
655 | 5281d757 | Mark McLoughlin | close(fd); |
656 | 5281d757 | Mark McLoughlin | return -1; |
657 | 5281d757 | Mark McLoughlin | } |
658 | 5281d757 | Mark McLoughlin | |
659 | 15ac913b | Mark McLoughlin | if (tap_set_sndbuf(s->fd, opts) < 0) { |
660 | 5281d757 | Mark McLoughlin | return -1; |
661 | 5281d757 | Mark McLoughlin | } |
662 | 5281d757 | Mark McLoughlin | |
663 | 5281d757 | Mark McLoughlin | if (qemu_opt_get(opts, "fd")) { |
664 | 3e35ba93 | Mark McLoughlin | snprintf(s->nc.info_str, sizeof(s->nc.info_str), "fd=%d", fd); |
665 | a7c36ee4 | Corey Bryant | } else if (qemu_opt_get(opts, "helper")) { |
666 | a7c36ee4 | Corey Bryant | snprintf(s->nc.info_str, sizeof(s->nc.info_str),
|
667 | a7c36ee4 | Corey Bryant | "helper=%s", qemu_opt_get(opts, "helper")); |
668 | 5281d757 | Mark McLoughlin | } else {
|
669 | 5281d757 | Mark McLoughlin | const char *ifname, *script, *downscript; |
670 | 5281d757 | Mark McLoughlin | |
671 | 5281d757 | Mark McLoughlin | ifname = qemu_opt_get(opts, "ifname");
|
672 | 5281d757 | Mark McLoughlin | script = qemu_opt_get(opts, "script");
|
673 | 5281d757 | Mark McLoughlin | downscript = qemu_opt_get(opts, "downscript");
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674 | 5281d757 | Mark McLoughlin | |
675 | 3e35ba93 | Mark McLoughlin | snprintf(s->nc.info_str, sizeof(s->nc.info_str),
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676 | 5281d757 | Mark McLoughlin | "ifname=%s,script=%s,downscript=%s",
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677 | 5281d757 | Mark McLoughlin | ifname, script, downscript); |
678 | 5281d757 | Mark McLoughlin | |
679 | 5281d757 | Mark McLoughlin | if (strcmp(downscript, "no") != 0) { |
680 | 5281d757 | Mark McLoughlin | snprintf(s->down_script, sizeof(s->down_script), "%s", downscript); |
681 | 5281d757 | Mark McLoughlin | snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname); |
682 | 5281d757 | Mark McLoughlin | } |
683 | 5281d757 | Mark McLoughlin | } |
684 | 5281d757 | Mark McLoughlin | |
685 | 5430a28f | mst@redhat.com | if (qemu_opt_get_bool(opts, "vhost", !!qemu_opt_get(opts, "vhostfd") || |
686 | 5430a28f | mst@redhat.com | qemu_opt_get_bool(opts, "vhostforce", false))) { |
687 | 82b0d80e | Michael S. Tsirkin | int vhostfd, r;
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688 | 5430a28f | mst@redhat.com | bool force = qemu_opt_get_bool(opts, "vhostforce", false); |
689 | 82b0d80e | Michael S. Tsirkin | if (qemu_opt_get(opts, "vhostfd")) { |
690 | 82b0d80e | Michael S. Tsirkin | r = net_handle_fd_param(mon, qemu_opt_get(opts, "vhostfd"));
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691 | 82b0d80e | Michael S. Tsirkin | if (r == -1) { |
692 | 82b0d80e | Michael S. Tsirkin | return -1; |
693 | 82b0d80e | Michael S. Tsirkin | } |
694 | 82b0d80e | Michael S. Tsirkin | vhostfd = r; |
695 | 82b0d80e | Michael S. Tsirkin | } else {
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696 | 82b0d80e | Michael S. Tsirkin | vhostfd = -1;
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697 | 82b0d80e | Michael S. Tsirkin | } |
698 | 5430a28f | mst@redhat.com | s->vhost_net = vhost_net_init(&s->nc, vhostfd, force); |
699 | 82b0d80e | Michael S. Tsirkin | if (!s->vhost_net) {
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700 | 82b0d80e | Michael S. Tsirkin | error_report("vhost-net requested but could not be initialized");
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701 | 82b0d80e | Michael S. Tsirkin | return -1; |
702 | 82b0d80e | Michael S. Tsirkin | } |
703 | 82b0d80e | Michael S. Tsirkin | } else if (qemu_opt_get(opts, "vhostfd")) { |
704 | 82b0d80e | Michael S. Tsirkin | error_report("vhostfd= is not valid without vhost");
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705 | 82b0d80e | Michael S. Tsirkin | return -1; |
706 | 82b0d80e | Michael S. Tsirkin | } |
707 | 82b0d80e | Michael S. Tsirkin | |
708 | 5281d757 | Mark McLoughlin | return 0; |
709 | 5281d757 | Mark McLoughlin | } |
710 | b202554c | Michael S. Tsirkin | |
711 | b202554c | Michael S. Tsirkin | VHostNetState *tap_get_vhost_net(VLANClientState *nc) |
712 | b202554c | Michael S. Tsirkin | { |
713 | b202554c | Michael S. Tsirkin | TAPState *s = DO_UPCAST(TAPState, nc, nc); |
714 | b202554c | Michael S. Tsirkin | assert(nc->info->type == NET_CLIENT_TYPE_TAP); |
715 | b202554c | Michael S. Tsirkin | return s->vhost_net;
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716 | b202554c | Michael S. Tsirkin | } |