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Commit | Line | Data |
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5f6f6664 NN |
1 | /* |
2 | * vhost-user | |
3 | * | |
4 | * Copyright (c) 2013 Virtual Open Systems Sarl. | |
5 | * | |
6 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
7 | * See the COPYING file in the top-level directory. | |
8 | * | |
9 | */ | |
10 | ||
11 | #include "hw/virtio/vhost.h" | |
12 | #include "hw/virtio/vhost-backend.h" | |
3e866365 | 13 | #include "hw/virtio/virtio-net.h" |
5f6f6664 NN |
14 | #include "sysemu/char.h" |
15 | #include "sysemu/kvm.h" | |
16 | #include "qemu/error-report.h" | |
17 | #include "qemu/sockets.h" | |
3fd74b84 | 18 | #include "exec/ram_addr.h" |
d2fc4402 | 19 | #include "migration/migration.h" |
5f6f6664 NN |
20 | |
21 | #include <fcntl.h> | |
22 | #include <unistd.h> | |
23 | #include <sys/ioctl.h> | |
24 | #include <sys/socket.h> | |
25 | #include <sys/un.h> | |
26 | #include <linux/vhost.h> | |
27 | ||
28 | #define VHOST_MEMORY_MAX_NREGIONS 8 | |
dcb10c00 | 29 | #define VHOST_USER_F_PROTOCOL_FEATURES 30 |
e2051e9e | 30 | |
3e866365 | 31 | #define VHOST_USER_PROTOCOL_FEATURE_MASK 0x7ULL |
1be0ac21 MAL |
32 | #define VHOST_USER_PROTOCOL_F_MQ 0 |
33 | #define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1 | |
3e866365 | 34 | #define VHOST_USER_PROTOCOL_F_RARP 2 |
5f6f6664 NN |
35 | |
36 | typedef enum VhostUserRequest { | |
37 | VHOST_USER_NONE = 0, | |
38 | VHOST_USER_GET_FEATURES = 1, | |
39 | VHOST_USER_SET_FEATURES = 2, | |
40 | VHOST_USER_SET_OWNER = 3, | |
d1f8b30e | 41 | VHOST_USER_RESET_DEVICE = 4, |
5f6f6664 NN |
42 | VHOST_USER_SET_MEM_TABLE = 5, |
43 | VHOST_USER_SET_LOG_BASE = 6, | |
44 | VHOST_USER_SET_LOG_FD = 7, | |
45 | VHOST_USER_SET_VRING_NUM = 8, | |
46 | VHOST_USER_SET_VRING_ADDR = 9, | |
47 | VHOST_USER_SET_VRING_BASE = 10, | |
48 | VHOST_USER_GET_VRING_BASE = 11, | |
49 | VHOST_USER_SET_VRING_KICK = 12, | |
50 | VHOST_USER_SET_VRING_CALL = 13, | |
51 | VHOST_USER_SET_VRING_ERR = 14, | |
dcb10c00 MT |
52 | VHOST_USER_GET_PROTOCOL_FEATURES = 15, |
53 | VHOST_USER_SET_PROTOCOL_FEATURES = 16, | |
e2051e9e | 54 | VHOST_USER_GET_QUEUE_NUM = 17, |
7263a0ad | 55 | VHOST_USER_SET_VRING_ENABLE = 18, |
3e866365 | 56 | VHOST_USER_SEND_RARP = 19, |
5f6f6664 NN |
57 | VHOST_USER_MAX |
58 | } VhostUserRequest; | |
59 | ||
60 | typedef struct VhostUserMemoryRegion { | |
61 | uint64_t guest_phys_addr; | |
62 | uint64_t memory_size; | |
63 | uint64_t userspace_addr; | |
3fd74b84 | 64 | uint64_t mmap_offset; |
5f6f6664 NN |
65 | } VhostUserMemoryRegion; |
66 | ||
67 | typedef struct VhostUserMemory { | |
68 | uint32_t nregions; | |
69 | uint32_t padding; | |
70 | VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS]; | |
71 | } VhostUserMemory; | |
72 | ||
73 | typedef struct VhostUserMsg { | |
74 | VhostUserRequest request; | |
75 | ||
76 | #define VHOST_USER_VERSION_MASK (0x3) | |
77 | #define VHOST_USER_REPLY_MASK (0x1<<2) | |
78 | uint32_t flags; | |
79 | uint32_t size; /* the following payload size */ | |
80 | union { | |
81 | #define VHOST_USER_VRING_IDX_MASK (0xff) | |
82 | #define VHOST_USER_VRING_NOFD_MASK (0x1<<8) | |
83 | uint64_t u64; | |
84 | struct vhost_vring_state state; | |
85 | struct vhost_vring_addr addr; | |
86 | VhostUserMemory memory; | |
87 | }; | |
88 | } QEMU_PACKED VhostUserMsg; | |
89 | ||
90 | static VhostUserMsg m __attribute__ ((unused)); | |
91 | #define VHOST_USER_HDR_SIZE (sizeof(m.request) \ | |
92 | + sizeof(m.flags) \ | |
93 | + sizeof(m.size)) | |
94 | ||
95 | #define VHOST_USER_PAYLOAD_SIZE (sizeof(m) - VHOST_USER_HDR_SIZE) | |
96 | ||
97 | /* The version of the protocol we support */ | |
98 | #define VHOST_USER_VERSION (0x1) | |
99 | ||
100 | static bool ioeventfd_enabled(void) | |
101 | { | |
102 | return kvm_enabled() && kvm_eventfds_enabled(); | |
103 | } | |
104 | ||
5f6f6664 NN |
105 | static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg) |
106 | { | |
107 | CharDriverState *chr = dev->opaque; | |
108 | uint8_t *p = (uint8_t *) msg; | |
109 | int r, size = VHOST_USER_HDR_SIZE; | |
110 | ||
111 | r = qemu_chr_fe_read_all(chr, p, size); | |
112 | if (r != size) { | |
ab7c5aaf | 113 | error_report("Failed to read msg header. Read %d instead of %d.", r, |
5f6f6664 NN |
114 | size); |
115 | goto fail; | |
116 | } | |
117 | ||
118 | /* validate received flags */ | |
119 | if (msg->flags != (VHOST_USER_REPLY_MASK | VHOST_USER_VERSION)) { | |
120 | error_report("Failed to read msg header." | |
ab7c5aaf | 121 | " Flags 0x%x instead of 0x%x.", msg->flags, |
5f6f6664 NN |
122 | VHOST_USER_REPLY_MASK | VHOST_USER_VERSION); |
123 | goto fail; | |
124 | } | |
125 | ||
126 | /* validate message size is sane */ | |
127 | if (msg->size > VHOST_USER_PAYLOAD_SIZE) { | |
128 | error_report("Failed to read msg header." | |
ab7c5aaf | 129 | " Size %d exceeds the maximum %zu.", msg->size, |
5f6f6664 NN |
130 | VHOST_USER_PAYLOAD_SIZE); |
131 | goto fail; | |
132 | } | |
133 | ||
134 | if (msg->size) { | |
135 | p += VHOST_USER_HDR_SIZE; | |
136 | size = msg->size; | |
137 | r = qemu_chr_fe_read_all(chr, p, size); | |
138 | if (r != size) { | |
139 | error_report("Failed to read msg payload." | |
ab7c5aaf | 140 | " Read %d instead of %d.", r, msg->size); |
5f6f6664 NN |
141 | goto fail; |
142 | } | |
143 | } | |
144 | ||
145 | return 0; | |
146 | ||
147 | fail: | |
148 | return -1; | |
149 | } | |
150 | ||
21e70425 MAL |
151 | static bool vhost_user_one_time_request(VhostUserRequest request) |
152 | { | |
153 | switch (request) { | |
154 | case VHOST_USER_SET_OWNER: | |
155 | case VHOST_USER_RESET_DEVICE: | |
156 | case VHOST_USER_SET_MEM_TABLE: | |
157 | case VHOST_USER_GET_QUEUE_NUM: | |
158 | return true; | |
159 | default: | |
160 | return false; | |
161 | } | |
162 | } | |
163 | ||
164 | /* most non-init callers ignore the error */ | |
5f6f6664 NN |
165 | static int vhost_user_write(struct vhost_dev *dev, VhostUserMsg *msg, |
166 | int *fds, int fd_num) | |
167 | { | |
168 | CharDriverState *chr = dev->opaque; | |
169 | int size = VHOST_USER_HDR_SIZE + msg->size; | |
170 | ||
21e70425 MAL |
171 | /* |
172 | * For non-vring specific requests, like VHOST_USER_SET_MEM_TABLE, | |
173 | * we just need send it once in the first time. For later such | |
174 | * request, we just ignore it. | |
175 | */ | |
176 | if (vhost_user_one_time_request(msg->request) && dev->vq_index != 0) { | |
177 | return 0; | |
178 | } | |
179 | ||
5f6f6664 NN |
180 | if (fd_num) { |
181 | qemu_chr_fe_set_msgfds(chr, fds, fd_num); | |
182 | } | |
183 | ||
184 | return qemu_chr_fe_write_all(chr, (const uint8_t *) msg, size) == size ? | |
185 | 0 : -1; | |
186 | } | |
187 | ||
21e70425 MAL |
188 | static int vhost_user_set_log_base(struct vhost_dev *dev, uint64_t base, |
189 | struct vhost_log *log) | |
b931bfbf | 190 | { |
21e70425 MAL |
191 | int fds[VHOST_MEMORY_MAX_NREGIONS]; |
192 | size_t fd_num = 0; | |
193 | bool shmfd = virtio_has_feature(dev->protocol_features, | |
194 | VHOST_USER_PROTOCOL_F_LOG_SHMFD); | |
195 | VhostUserMsg msg = { | |
196 | .request = VHOST_USER_SET_LOG_BASE, | |
197 | .flags = VHOST_USER_VERSION, | |
198 | .u64 = base, | |
199 | .size = sizeof(m.u64), | |
200 | }; | |
201 | ||
202 | if (shmfd && log->fd != -1) { | |
203 | fds[fd_num++] = log->fd; | |
204 | } | |
205 | ||
206 | vhost_user_write(dev, &msg, fds, fd_num); | |
207 | ||
208 | if (shmfd) { | |
209 | msg.size = 0; | |
210 | if (vhost_user_read(dev, &msg) < 0) { | |
211 | return 0; | |
212 | } | |
213 | ||
214 | if (msg.request != VHOST_USER_SET_LOG_BASE) { | |
215 | error_report("Received unexpected msg type. " | |
216 | "Expected %d received %d", | |
217 | VHOST_USER_SET_LOG_BASE, msg.request); | |
218 | return -1; | |
219 | } | |
b931bfbf | 220 | } |
21e70425 MAL |
221 | |
222 | return 0; | |
b931bfbf CO |
223 | } |
224 | ||
21e70425 MAL |
225 | static int vhost_user_set_mem_table(struct vhost_dev *dev, |
226 | struct vhost_memory *mem) | |
5f6f6664 | 227 | { |
5f6f6664 | 228 | int fds[VHOST_MEMORY_MAX_NREGIONS]; |
3fd74b84 | 229 | int i, fd; |
5f6f6664 | 230 | size_t fd_num = 0; |
21e70425 MAL |
231 | VhostUserMsg msg = { |
232 | .request = VHOST_USER_SET_MEM_TABLE, | |
233 | .flags = VHOST_USER_VERSION, | |
234 | }; | |
5f6f6664 | 235 | |
21e70425 MAL |
236 | for (i = 0; i < dev->mem->nregions; ++i) { |
237 | struct vhost_memory_region *reg = dev->mem->regions + i; | |
238 | ram_addr_t ram_addr; | |
239 | ||
240 | assert((uintptr_t)reg->userspace_addr == reg->userspace_addr); | |
241 | qemu_ram_addr_from_host((void *)(uintptr_t)reg->userspace_addr, | |
242 | &ram_addr); | |
243 | fd = qemu_get_ram_fd(ram_addr); | |
244 | if (fd > 0) { | |
245 | msg.memory.regions[fd_num].userspace_addr = reg->userspace_addr; | |
246 | msg.memory.regions[fd_num].memory_size = reg->memory_size; | |
247 | msg.memory.regions[fd_num].guest_phys_addr = reg->guest_phys_addr; | |
248 | msg.memory.regions[fd_num].mmap_offset = reg->userspace_addr - | |
249 | (uintptr_t) qemu_get_ram_block_host_ptr(ram_addr); | |
250 | assert(fd_num < VHOST_MEMORY_MAX_NREGIONS); | |
251 | fds[fd_num++] = fd; | |
252 | } | |
7305483a YL |
253 | } |
254 | ||
21e70425 MAL |
255 | msg.memory.nregions = fd_num; |
256 | ||
257 | if (!fd_num) { | |
258 | error_report("Failed initializing vhost-user memory map, " | |
259 | "consider using -object memory-backend-file share=on"); | |
260 | return -1; | |
b931bfbf CO |
261 | } |
262 | ||
21e70425 MAL |
263 | msg.size = sizeof(m.memory.nregions); |
264 | msg.size += sizeof(m.memory.padding); | |
265 | msg.size += fd_num * sizeof(VhostUserMemoryRegion); | |
5f6f6664 | 266 | |
21e70425 | 267 | vhost_user_write(dev, &msg, fds, fd_num); |
5f6f6664 | 268 | |
21e70425 MAL |
269 | return 0; |
270 | } | |
5f6f6664 | 271 | |
21e70425 MAL |
272 | static int vhost_user_set_vring_addr(struct vhost_dev *dev, |
273 | struct vhost_vring_addr *addr) | |
274 | { | |
275 | VhostUserMsg msg = { | |
276 | .request = VHOST_USER_SET_VRING_ADDR, | |
277 | .flags = VHOST_USER_VERSION, | |
278 | .addr = *addr, | |
279 | .size = sizeof(*addr), | |
280 | }; | |
5f6f6664 | 281 | |
21e70425 | 282 | vhost_user_write(dev, &msg, NULL, 0); |
5f6f6664 | 283 | |
21e70425 MAL |
284 | return 0; |
285 | } | |
5f6f6664 | 286 | |
21e70425 MAL |
287 | static int vhost_user_set_vring_endian(struct vhost_dev *dev, |
288 | struct vhost_vring_state *ring) | |
289 | { | |
290 | error_report("vhost-user trying to send unhandled ioctl"); | |
291 | return -1; | |
292 | } | |
5f6f6664 | 293 | |
21e70425 MAL |
294 | static int vhost_set_vring(struct vhost_dev *dev, |
295 | unsigned long int request, | |
296 | struct vhost_vring_state *ring) | |
297 | { | |
298 | VhostUserMsg msg = { | |
299 | .request = request, | |
300 | .flags = VHOST_USER_VERSION, | |
301 | .state = *ring, | |
302 | .size = sizeof(*ring), | |
303 | }; | |
304 | ||
305 | vhost_user_write(dev, &msg, NULL, 0); | |
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
310 | static int vhost_user_set_vring_num(struct vhost_dev *dev, | |
311 | struct vhost_vring_state *ring) | |
312 | { | |
313 | return vhost_set_vring(dev, VHOST_USER_SET_VRING_NUM, ring); | |
314 | } | |
315 | ||
316 | static int vhost_user_set_vring_base(struct vhost_dev *dev, | |
317 | struct vhost_vring_state *ring) | |
318 | { | |
319 | return vhost_set_vring(dev, VHOST_USER_SET_VRING_BASE, ring); | |
320 | } | |
321 | ||
322 | static int vhost_user_set_vring_enable(struct vhost_dev *dev, int enable) | |
323 | { | |
324 | struct vhost_vring_state state = { | |
325 | .index = dev->vq_index, | |
326 | .num = enable, | |
327 | }; | |
328 | ||
329 | if (!(dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_MQ))) { | |
5f6f6664 | 330 | return -1; |
5f6f6664 NN |
331 | } |
332 | ||
21e70425 MAL |
333 | return vhost_set_vring(dev, VHOST_USER_SET_VRING_ENABLE, &state); |
334 | } | |
335 | ||
336 | ||
337 | static int vhost_user_get_vring_base(struct vhost_dev *dev, | |
338 | struct vhost_vring_state *ring) | |
339 | { | |
340 | VhostUserMsg msg = { | |
341 | .request = VHOST_USER_GET_VRING_BASE, | |
342 | .flags = VHOST_USER_VERSION, | |
343 | .state = *ring, | |
344 | .size = sizeof(*ring), | |
345 | }; | |
346 | ||
347 | vhost_user_write(dev, &msg, NULL, 0); | |
348 | ||
349 | if (vhost_user_read(dev, &msg) < 0) { | |
5f6f6664 NN |
350 | return 0; |
351 | } | |
352 | ||
21e70425 MAL |
353 | if (msg.request != VHOST_USER_GET_VRING_BASE) { |
354 | error_report("Received unexpected msg type. Expected %d received %d", | |
355 | VHOST_USER_GET_VRING_BASE, msg.request); | |
356 | return -1; | |
357 | } | |
5f6f6664 | 358 | |
21e70425 MAL |
359 | if (msg.size != sizeof(m.state)) { |
360 | error_report("Received bad msg size."); | |
361 | return -1; | |
5f6f6664 NN |
362 | } |
363 | ||
21e70425 MAL |
364 | *ring = msg.state; |
365 | ||
5f6f6664 NN |
366 | return 0; |
367 | } | |
368 | ||
21e70425 MAL |
369 | static int vhost_set_vring_file(struct vhost_dev *dev, |
370 | VhostUserRequest request, | |
371 | struct vhost_vring_file *file) | |
c2bea314 | 372 | { |
9a78a5dd MAL |
373 | int fds[VHOST_MEMORY_MAX_NREGIONS]; |
374 | size_t fd_num = 0; | |
c2bea314 | 375 | VhostUserMsg msg = { |
21e70425 | 376 | .request = request, |
c2bea314 | 377 | .flags = VHOST_USER_VERSION, |
21e70425 | 378 | .u64 = file->index & VHOST_USER_VRING_IDX_MASK, |
c2bea314 MAL |
379 | .size = sizeof(m.u64), |
380 | }; | |
381 | ||
21e70425 MAL |
382 | if (ioeventfd_enabled() && file->fd > 0) { |
383 | fds[fd_num++] = file->fd; | |
384 | } else { | |
385 | msg.u64 |= VHOST_USER_VRING_NOFD_MASK; | |
9a78a5dd MAL |
386 | } |
387 | ||
388 | vhost_user_write(dev, &msg, fds, fd_num); | |
389 | ||
21e70425 MAL |
390 | return 0; |
391 | } | |
9a78a5dd | 392 | |
21e70425 MAL |
393 | static int vhost_user_set_vring_kick(struct vhost_dev *dev, |
394 | struct vhost_vring_file *file) | |
395 | { | |
396 | return vhost_set_vring_file(dev, VHOST_USER_SET_VRING_KICK, file); | |
397 | } | |
398 | ||
399 | static int vhost_user_set_vring_call(struct vhost_dev *dev, | |
400 | struct vhost_vring_file *file) | |
401 | { | |
402 | return vhost_set_vring_file(dev, VHOST_USER_SET_VRING_CALL, file); | |
403 | } | |
404 | ||
405 | static int vhost_user_set_u64(struct vhost_dev *dev, int request, uint64_t u64) | |
406 | { | |
407 | VhostUserMsg msg = { | |
408 | .request = request, | |
409 | .flags = VHOST_USER_VERSION, | |
410 | .u64 = u64, | |
411 | .size = sizeof(m.u64), | |
412 | }; | |
413 | ||
414 | vhost_user_write(dev, &msg, NULL, 0); | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
419 | static int vhost_user_set_features(struct vhost_dev *dev, | |
420 | uint64_t features) | |
421 | { | |
422 | return vhost_user_set_u64(dev, VHOST_USER_SET_FEATURES, features); | |
423 | } | |
424 | ||
425 | static int vhost_user_set_protocol_features(struct vhost_dev *dev, | |
426 | uint64_t features) | |
427 | { | |
428 | return vhost_user_set_u64(dev, VHOST_USER_SET_PROTOCOL_FEATURES, features); | |
429 | } | |
430 | ||
431 | static int vhost_user_get_u64(struct vhost_dev *dev, int request, uint64_t *u64) | |
432 | { | |
433 | VhostUserMsg msg = { | |
434 | .request = request, | |
435 | .flags = VHOST_USER_VERSION, | |
436 | }; | |
437 | ||
438 | if (vhost_user_one_time_request(request) && dev->vq_index != 0) { | |
439 | return 0; | |
9a78a5dd | 440 | } |
c2bea314 | 441 | |
21e70425 MAL |
442 | vhost_user_write(dev, &msg, NULL, 0); |
443 | ||
444 | if (vhost_user_read(dev, &msg) < 0) { | |
445 | return 0; | |
446 | } | |
447 | ||
448 | if (msg.request != request) { | |
449 | error_report("Received unexpected msg type. Expected %d received %d", | |
450 | request, msg.request); | |
451 | return -1; | |
452 | } | |
453 | ||
454 | if (msg.size != sizeof(m.u64)) { | |
455 | error_report("Received bad msg size."); | |
456 | return -1; | |
457 | } | |
458 | ||
459 | *u64 = msg.u64; | |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
464 | static int vhost_user_get_features(struct vhost_dev *dev, uint64_t *features) | |
465 | { | |
466 | return vhost_user_get_u64(dev, VHOST_USER_GET_FEATURES, features); | |
467 | } | |
468 | ||
469 | static int vhost_user_set_owner(struct vhost_dev *dev) | |
470 | { | |
471 | VhostUserMsg msg = { | |
472 | .request = VHOST_USER_SET_OWNER, | |
473 | .flags = VHOST_USER_VERSION, | |
474 | }; | |
475 | ||
476 | vhost_user_write(dev, &msg, NULL, 0); | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
481 | static int vhost_user_reset_device(struct vhost_dev *dev) | |
482 | { | |
483 | VhostUserMsg msg = { | |
484 | .request = VHOST_USER_RESET_DEVICE, | |
485 | .flags = VHOST_USER_VERSION, | |
486 | }; | |
487 | ||
488 | vhost_user_write(dev, &msg, NULL, 0); | |
489 | ||
c2bea314 MAL |
490 | return 0; |
491 | } | |
492 | ||
5f6f6664 NN |
493 | static int vhost_user_init(struct vhost_dev *dev, void *opaque) |
494 | { | |
21e70425 | 495 | uint64_t features; |
dcb10c00 MT |
496 | int err; |
497 | ||
5f6f6664 NN |
498 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); |
499 | ||
500 | dev->opaque = opaque; | |
501 | ||
21e70425 | 502 | err = vhost_user_get_features(dev, &features); |
dcb10c00 MT |
503 | if (err < 0) { |
504 | return err; | |
505 | } | |
506 | ||
507 | if (virtio_has_feature(features, VHOST_USER_F_PROTOCOL_FEATURES)) { | |
508 | dev->backend_features |= 1ULL << VHOST_USER_F_PROTOCOL_FEATURES; | |
509 | ||
21e70425 MAL |
510 | err = vhost_user_get_u64(dev, VHOST_USER_GET_PROTOCOL_FEATURES, |
511 | &features); | |
dcb10c00 MT |
512 | if (err < 0) { |
513 | return err; | |
514 | } | |
515 | ||
516 | dev->protocol_features = features & VHOST_USER_PROTOCOL_FEATURE_MASK; | |
21e70425 | 517 | err = vhost_user_set_protocol_features(dev, dev->protocol_features); |
dcb10c00 MT |
518 | if (err < 0) { |
519 | return err; | |
520 | } | |
e2051e9e YL |
521 | |
522 | /* query the max queues we support if backend supports Multiple Queue */ | |
523 | if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_MQ)) { | |
21e70425 MAL |
524 | err = vhost_user_get_u64(dev, VHOST_USER_GET_QUEUE_NUM, |
525 | &dev->max_queues); | |
e2051e9e YL |
526 | if (err < 0) { |
527 | return err; | |
528 | } | |
529 | } | |
dcb10c00 MT |
530 | } |
531 | ||
d2fc4402 MAL |
532 | if (dev->migration_blocker == NULL && |
533 | !virtio_has_feature(dev->protocol_features, | |
534 | VHOST_USER_PROTOCOL_F_LOG_SHMFD)) { | |
535 | error_setg(&dev->migration_blocker, | |
536 | "Migration disabled: vhost-user backend lacks " | |
537 | "VHOST_USER_PROTOCOL_F_LOG_SHMFD feature."); | |
538 | } | |
539 | ||
5f6f6664 NN |
540 | return 0; |
541 | } | |
542 | ||
543 | static int vhost_user_cleanup(struct vhost_dev *dev) | |
544 | { | |
545 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); | |
546 | ||
547 | dev->opaque = 0; | |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
fc57fd99 YL |
552 | static int vhost_user_get_vq_index(struct vhost_dev *dev, int idx) |
553 | { | |
554 | assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); | |
555 | ||
556 | return idx; | |
557 | } | |
558 | ||
2ce68e4c IM |
559 | static int vhost_user_memslots_limit(struct vhost_dev *dev) |
560 | { | |
561 | return VHOST_MEMORY_MAX_NREGIONS; | |
562 | } | |
563 | ||
1be0ac21 MAL |
564 | static bool vhost_user_requires_shm_log(struct vhost_dev *dev) |
565 | { | |
566 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); | |
567 | ||
568 | return virtio_has_feature(dev->protocol_features, | |
569 | VHOST_USER_PROTOCOL_F_LOG_SHMFD); | |
570 | } | |
571 | ||
3e866365 TC |
572 | static int vhost_user_migration_done(struct vhost_dev *dev, char* mac_addr) |
573 | { | |
574 | VhostUserMsg msg = { 0 }; | |
575 | int err; | |
576 | ||
577 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); | |
578 | ||
579 | /* If guest supports GUEST_ANNOUNCE do nothing */ | |
580 | if (virtio_has_feature(dev->acked_features, VIRTIO_NET_F_GUEST_ANNOUNCE)) { | |
581 | return 0; | |
582 | } | |
583 | ||
584 | /* if backend supports VHOST_USER_PROTOCOL_F_RARP ask it to send the RARP */ | |
585 | if (virtio_has_feature(dev->protocol_features, | |
586 | VHOST_USER_PROTOCOL_F_RARP)) { | |
587 | msg.request = VHOST_USER_SEND_RARP; | |
588 | msg.flags = VHOST_USER_VERSION; | |
589 | memcpy((char *)&msg.u64, mac_addr, 6); | |
590 | msg.size = sizeof(m.u64); | |
591 | ||
592 | err = vhost_user_write(dev, &msg, NULL, 0); | |
593 | return err; | |
594 | } | |
595 | return -1; | |
596 | } | |
597 | ||
5f6f6664 NN |
598 | const VhostOps user_ops = { |
599 | .backend_type = VHOST_BACKEND_TYPE_USER, | |
5f6f6664 | 600 | .vhost_backend_init = vhost_user_init, |
fc57fd99 | 601 | .vhost_backend_cleanup = vhost_user_cleanup, |
2ce68e4c | 602 | .vhost_backend_memslots_limit = vhost_user_memslots_limit, |
21e70425 MAL |
603 | .vhost_set_log_base = vhost_user_set_log_base, |
604 | .vhost_set_mem_table = vhost_user_set_mem_table, | |
605 | .vhost_set_vring_addr = vhost_user_set_vring_addr, | |
606 | .vhost_set_vring_endian = vhost_user_set_vring_endian, | |
607 | .vhost_set_vring_num = vhost_user_set_vring_num, | |
608 | .vhost_set_vring_base = vhost_user_set_vring_base, | |
609 | .vhost_get_vring_base = vhost_user_get_vring_base, | |
610 | .vhost_set_vring_kick = vhost_user_set_vring_kick, | |
611 | .vhost_set_vring_call = vhost_user_set_vring_call, | |
612 | .vhost_set_features = vhost_user_set_features, | |
613 | .vhost_get_features = vhost_user_get_features, | |
614 | .vhost_set_owner = vhost_user_set_owner, | |
615 | .vhost_reset_device = vhost_user_reset_device, | |
616 | .vhost_get_vq_index = vhost_user_get_vq_index, | |
617 | .vhost_set_vring_enable = vhost_user_set_vring_enable, | |
1be0ac21 | 618 | .vhost_requires_shm_log = vhost_user_requires_shm_log, |
3e866365 | 619 | .vhost_migration_done = vhost_user_migration_done, |
fc57fd99 | 620 | }; |