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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 | ||
9b8bfe21 | 11 | #include "qemu/osdep.h" |
da34e65c | 12 | #include "qapi/error.h" |
16094766 | 13 | #include "hw/virtio/virtio-dmabuf.h" |
5f6f6664 | 14 | #include "hw/virtio/vhost.h" |
5c33f978 | 15 | #include "hw/virtio/virtio-crypto.h" |
4d0cf552 | 16 | #include "hw/virtio/vhost-user.h" |
5f6f6664 | 17 | #include "hw/virtio/vhost-backend.h" |
44866521 | 18 | #include "hw/virtio/virtio.h" |
3e866365 | 19 | #include "hw/virtio/virtio-net.h" |
4d43a603 | 20 | #include "chardev/char-fe.h" |
57dc0217 | 21 | #include "io/channel-socket.h" |
5f6f6664 NN |
22 | #include "sysemu/kvm.h" |
23 | #include "qemu/error-report.h" | |
db725815 | 24 | #include "qemu/main-loop.h" |
16094766 | 25 | #include "qemu/uuid.h" |
5f6f6664 | 26 | #include "qemu/sockets.h" |
71e076a0 | 27 | #include "sysemu/runstate.h" |
efbfeb81 | 28 | #include "sysemu/cryptodev.h" |
9ccbfe14 DDAG |
29 | #include "migration/migration.h" |
30 | #include "migration/postcopy-ram.h" | |
6864a7b5 | 31 | #include "trace.h" |
0b0af4d6 | 32 | #include "exec/ramblock.h" |
5f6f6664 | 33 | |
5f6f6664 NN |
34 | #include <sys/ioctl.h> |
35 | #include <sys/socket.h> | |
36 | #include <sys/un.h> | |
18658a3c PB |
37 | |
38 | #include "standard-headers/linux/vhost_types.h" | |
39 | ||
40 | #ifdef CONFIG_LINUX | |
375318d0 | 41 | #include <linux/userfaultfd.h> |
18658a3c | 42 | #endif |
5f6f6664 | 43 | |
27598393 | 44 | #define VHOST_MEMORY_BASELINE_NREGIONS 8 |
dcb10c00 | 45 | #define VHOST_USER_F_PROTOCOL_FEATURES 30 |
a84ec993 | 46 | #define VHOST_USER_BACKEND_MAX_FDS 8 |
e2051e9e | 47 | |
bab10530 | 48 | #if defined(TARGET_PPC) || defined(TARGET_PPC64) |
27598393 RN |
49 | #include "hw/ppc/spapr.h" |
50 | #define VHOST_USER_MAX_RAM_SLOTS SPAPR_MAX_RAM_SLOTS | |
51 | ||
52 | #else | |
53 | #define VHOST_USER_MAX_RAM_SLOTS 512 | |
54 | #endif | |
55 | ||
4c3e257b CL |
56 | /* |
57 | * Maximum size of virtio device config space | |
58 | */ | |
59 | #define VHOST_USER_MAX_CONFIG_SIZE 256 | |
60 | ||
de1372d4 | 61 | #define VHOST_USER_PROTOCOL_FEATURE_MASK ((1 << VHOST_USER_PROTOCOL_F_MAX) - 1) |
5f6f6664 NN |
62 | |
63 | typedef enum VhostUserRequest { | |
64 | VHOST_USER_NONE = 0, | |
65 | VHOST_USER_GET_FEATURES = 1, | |
66 | VHOST_USER_SET_FEATURES = 2, | |
67 | VHOST_USER_SET_OWNER = 3, | |
60915dc4 | 68 | VHOST_USER_RESET_OWNER = 4, |
5f6f6664 NN |
69 | VHOST_USER_SET_MEM_TABLE = 5, |
70 | VHOST_USER_SET_LOG_BASE = 6, | |
71 | VHOST_USER_SET_LOG_FD = 7, | |
72 | VHOST_USER_SET_VRING_NUM = 8, | |
73 | VHOST_USER_SET_VRING_ADDR = 9, | |
74 | VHOST_USER_SET_VRING_BASE = 10, | |
75 | VHOST_USER_GET_VRING_BASE = 11, | |
76 | VHOST_USER_SET_VRING_KICK = 12, | |
77 | VHOST_USER_SET_VRING_CALL = 13, | |
78 | VHOST_USER_SET_VRING_ERR = 14, | |
dcb10c00 MT |
79 | VHOST_USER_GET_PROTOCOL_FEATURES = 15, |
80 | VHOST_USER_SET_PROTOCOL_FEATURES = 16, | |
e2051e9e | 81 | VHOST_USER_GET_QUEUE_NUM = 17, |
7263a0ad | 82 | VHOST_USER_SET_VRING_ENABLE = 18, |
3e866365 | 83 | VHOST_USER_SEND_RARP = 19, |
c5f048d8 | 84 | VHOST_USER_NET_SET_MTU = 20, |
a84ec993 | 85 | VHOST_USER_SET_BACKEND_REQ_FD = 21, |
6dcdd06e | 86 | VHOST_USER_IOTLB_MSG = 22, |
5df04f17 | 87 | VHOST_USER_SET_VRING_ENDIAN = 23, |
4c3e257b CL |
88 | VHOST_USER_GET_CONFIG = 24, |
89 | VHOST_USER_SET_CONFIG = 25, | |
efbfeb81 GA |
90 | VHOST_USER_CREATE_CRYPTO_SESSION = 26, |
91 | VHOST_USER_CLOSE_CRYPTO_SESSION = 27, | |
d3dff7a5 | 92 | VHOST_USER_POSTCOPY_ADVISE = 28, |
6864a7b5 | 93 | VHOST_USER_POSTCOPY_LISTEN = 29, |
c639187e | 94 | VHOST_USER_POSTCOPY_END = 30, |
5ad204bf XY |
95 | VHOST_USER_GET_INFLIGHT_FD = 31, |
96 | VHOST_USER_SET_INFLIGHT_FD = 32, | |
bd2e44fe | 97 | VHOST_USER_GPU_SET_SOCKET = 33, |
d91d57e6 | 98 | VHOST_USER_RESET_DEVICE = 34, |
6b0eff1a RN |
99 | /* Message number 35 reserved for VHOST_USER_VRING_KICK. */ |
100 | VHOST_USER_GET_MAX_MEM_SLOTS = 36, | |
f1aeb14b RN |
101 | VHOST_USER_ADD_MEM_REG = 37, |
102 | VHOST_USER_REM_MEM_REG = 38, | |
923b8921 YW |
103 | VHOST_USER_SET_STATUS = 39, |
104 | VHOST_USER_GET_STATUS = 40, | |
16094766 | 105 | VHOST_USER_GET_SHARED_OBJECT = 41, |
5f6f6664 NN |
106 | VHOST_USER_MAX |
107 | } VhostUserRequest; | |
108 | ||
f8ed3648 | 109 | typedef enum VhostUserBackendRequest { |
a84ec993 MC |
110 | VHOST_USER_BACKEND_NONE = 0, |
111 | VHOST_USER_BACKEND_IOTLB_MSG = 1, | |
112 | VHOST_USER_BACKEND_CONFIG_CHANGE_MSG = 2, | |
113 | VHOST_USER_BACKEND_VRING_HOST_NOTIFIER_MSG = 3, | |
16094766 AE |
114 | VHOST_USER_BACKEND_SHARED_OBJECT_ADD = 6, |
115 | VHOST_USER_BACKEND_SHARED_OBJECT_REMOVE = 7, | |
116 | VHOST_USER_BACKEND_SHARED_OBJECT_LOOKUP = 8, | |
a84ec993 | 117 | VHOST_USER_BACKEND_MAX |
f8ed3648 | 118 | } VhostUserBackendRequest; |
4bbeeba0 | 119 | |
5f6f6664 NN |
120 | typedef struct VhostUserMemoryRegion { |
121 | uint64_t guest_phys_addr; | |
122 | uint64_t memory_size; | |
123 | uint64_t userspace_addr; | |
3fd74b84 | 124 | uint64_t mmap_offset; |
5f6f6664 NN |
125 | } VhostUserMemoryRegion; |
126 | ||
127 | typedef struct VhostUserMemory { | |
128 | uint32_t nregions; | |
129 | uint32_t padding; | |
27598393 | 130 | VhostUserMemoryRegion regions[VHOST_MEMORY_BASELINE_NREGIONS]; |
5f6f6664 NN |
131 | } VhostUserMemory; |
132 | ||
f1aeb14b | 133 | typedef struct VhostUserMemRegMsg { |
3009edff | 134 | uint64_t padding; |
f1aeb14b RN |
135 | VhostUserMemoryRegion region; |
136 | } VhostUserMemRegMsg; | |
137 | ||
2b8819c6 VK |
138 | typedef struct VhostUserLog { |
139 | uint64_t mmap_size; | |
140 | uint64_t mmap_offset; | |
141 | } VhostUserLog; | |
142 | ||
4c3e257b CL |
143 | typedef struct VhostUserConfig { |
144 | uint32_t offset; | |
145 | uint32_t size; | |
146 | uint32_t flags; | |
147 | uint8_t region[VHOST_USER_MAX_CONFIG_SIZE]; | |
148 | } VhostUserConfig; | |
149 | ||
efbfeb81 GA |
150 | #define VHOST_CRYPTO_SYM_HMAC_MAX_KEY_LEN 512 |
151 | #define VHOST_CRYPTO_SYM_CIPHER_MAX_KEY_LEN 64 | |
5c33f978 | 152 | #define VHOST_CRYPTO_ASYM_MAX_KEY_LEN 1024 |
efbfeb81 GA |
153 | |
154 | typedef struct VhostUserCryptoSession { | |
5c33f978 GM |
155 | uint64_t op_code; |
156 | union { | |
157 | struct { | |
158 | CryptoDevBackendSymSessionInfo session_setup_data; | |
159 | uint8_t key[VHOST_CRYPTO_SYM_CIPHER_MAX_KEY_LEN]; | |
160 | uint8_t auth_key[VHOST_CRYPTO_SYM_HMAC_MAX_KEY_LEN]; | |
161 | } sym; | |
162 | struct { | |
163 | CryptoDevBackendAsymSessionInfo session_setup_data; | |
164 | uint8_t key[VHOST_CRYPTO_ASYM_MAX_KEY_LEN]; | |
165 | } asym; | |
166 | } u; | |
167 | ||
efbfeb81 GA |
168 | /* session id for success, -1 on errors */ |
169 | int64_t session_id; | |
efbfeb81 GA |
170 | } VhostUserCryptoSession; |
171 | ||
4c3e257b CL |
172 | static VhostUserConfig c __attribute__ ((unused)); |
173 | #define VHOST_USER_CONFIG_HDR_SIZE (sizeof(c.offset) \ | |
174 | + sizeof(c.size) \ | |
175 | + sizeof(c.flags)) | |
176 | ||
44866521 TB |
177 | typedef struct VhostUserVringArea { |
178 | uint64_t u64; | |
179 | uint64_t size; | |
180 | uint64_t offset; | |
181 | } VhostUserVringArea; | |
182 | ||
5ad204bf XY |
183 | typedef struct VhostUserInflight { |
184 | uint64_t mmap_size; | |
185 | uint64_t mmap_offset; | |
186 | uint16_t num_queues; | |
187 | uint16_t queue_size; | |
188 | } VhostUserInflight; | |
189 | ||
16094766 AE |
190 | typedef struct VhostUserShared { |
191 | unsigned char uuid[16]; | |
192 | } VhostUserShared; | |
193 | ||
24e34754 | 194 | typedef struct { |
5f6f6664 NN |
195 | VhostUserRequest request; |
196 | ||
197 | #define VHOST_USER_VERSION_MASK (0x3) | |
c97c76b3 | 198 | #define VHOST_USER_REPLY_MASK (0x1 << 2) |
ca525ce5 | 199 | #define VHOST_USER_NEED_REPLY_MASK (0x1 << 3) |
5f6f6664 NN |
200 | uint32_t flags; |
201 | uint32_t size; /* the following payload size */ | |
24e34754 MT |
202 | } QEMU_PACKED VhostUserHeader; |
203 | ||
204 | typedef union { | |
5f6f6664 | 205 | #define VHOST_USER_VRING_IDX_MASK (0xff) |
c97c76b3 | 206 | #define VHOST_USER_VRING_NOFD_MASK (0x1 << 8) |
5f6f6664 NN |
207 | uint64_t u64; |
208 | struct vhost_vring_state state; | |
209 | struct vhost_vring_addr addr; | |
210 | VhostUserMemory memory; | |
f1aeb14b | 211 | VhostUserMemRegMsg mem_reg; |
2b8819c6 | 212 | VhostUserLog log; |
6dcdd06e | 213 | struct vhost_iotlb_msg iotlb; |
4c3e257b | 214 | VhostUserConfig config; |
efbfeb81 | 215 | VhostUserCryptoSession session; |
44866521 | 216 | VhostUserVringArea area; |
5ad204bf | 217 | VhostUserInflight inflight; |
16094766 | 218 | VhostUserShared object; |
24e34754 MT |
219 | } VhostUserPayload; |
220 | ||
221 | typedef struct VhostUserMsg { | |
222 | VhostUserHeader hdr; | |
223 | VhostUserPayload payload; | |
5f6f6664 NN |
224 | } QEMU_PACKED VhostUserMsg; |
225 | ||
226 | static VhostUserMsg m __attribute__ ((unused)); | |
24e34754 | 227 | #define VHOST_USER_HDR_SIZE (sizeof(VhostUserHeader)) |
5f6f6664 | 228 | |
24e34754 | 229 | #define VHOST_USER_PAYLOAD_SIZE (sizeof(VhostUserPayload)) |
5f6f6664 NN |
230 | |
231 | /* The version of the protocol we support */ | |
232 | #define VHOST_USER_VERSION (0x1) | |
233 | ||
2152f3fe | 234 | struct vhost_user { |
9ccbfe14 | 235 | struct vhost_dev *dev; |
4d0cf552 TB |
236 | /* Shared between vhost devs of the same virtio device */ |
237 | VhostUserState *user; | |
f8ed3648 MP |
238 | QIOChannel *backend_ioc; |
239 | GSource *backend_src; | |
9ccbfe14 | 240 | NotifierWithReturn postcopy_notifier; |
f82c1116 | 241 | struct PostCopyFD postcopy_fd; |
27598393 | 242 | uint64_t postcopy_client_bases[VHOST_USER_MAX_RAM_SLOTS]; |
905125d0 DDAG |
243 | /* Length of the region_rb and region_rb_offset arrays */ |
244 | size_t region_rb_len; | |
245 | /* RAMBlock associated with a given region */ | |
246 | RAMBlock **region_rb; | |
c97c76b3 AB |
247 | /* |
248 | * The offset from the start of the RAMBlock to the start of the | |
905125d0 DDAG |
249 | * vhost region. |
250 | */ | |
251 | ram_addr_t *region_rb_offset; | |
252 | ||
6864a7b5 DDAG |
253 | /* True once we've entered postcopy_listen */ |
254 | bool postcopy_listen; | |
f1aeb14b RN |
255 | |
256 | /* Our current regions */ | |
257 | int num_shadow_regions; | |
27598393 | 258 | struct vhost_memory_region shadow_regions[VHOST_USER_MAX_RAM_SLOTS]; |
f1aeb14b RN |
259 | }; |
260 | ||
261 | struct scrub_regions { | |
262 | struct vhost_memory_region *region; | |
263 | int reg_idx; | |
264 | int fd_idx; | |
2152f3fe MAL |
265 | }; |
266 | ||
5f6f6664 NN |
267 | static bool ioeventfd_enabled(void) |
268 | { | |
b0aa77d3 | 269 | return !kvm_enabled() || kvm_eventfds_enabled(); |
5f6f6664 NN |
270 | } |
271 | ||
9af84c02 | 272 | static int vhost_user_read_header(struct vhost_dev *dev, VhostUserMsg *msg) |
5f6f6664 | 273 | { |
2152f3fe | 274 | struct vhost_user *u = dev->opaque; |
4d0cf552 | 275 | CharBackend *chr = u->user->chr; |
5f6f6664 NN |
276 | uint8_t *p = (uint8_t *) msg; |
277 | int r, size = VHOST_USER_HDR_SIZE; | |
278 | ||
279 | r = qemu_chr_fe_read_all(chr, p, size); | |
280 | if (r != size) { | |
025faa87 | 281 | int saved_errno = errno; |
5421f318 | 282 | error_report("Failed to read msg header. Read %d instead of %d." |
24e34754 | 283 | " Original request %d.", r, size, msg->hdr.request); |
025faa87 | 284 | return r < 0 ? -saved_errno : -EIO; |
5f6f6664 NN |
285 | } |
286 | ||
287 | /* validate received flags */ | |
24e34754 | 288 | if (msg->hdr.flags != (VHOST_USER_REPLY_MASK | VHOST_USER_VERSION)) { |
5f6f6664 | 289 | error_report("Failed to read msg header." |
24e34754 | 290 | " Flags 0x%x instead of 0x%x.", msg->hdr.flags, |
5f6f6664 | 291 | VHOST_USER_REPLY_MASK | VHOST_USER_VERSION); |
025faa87 | 292 | return -EPROTO; |
9af84c02 MAL |
293 | } |
294 | ||
643a9435 AB |
295 | trace_vhost_user_read(msg->hdr.request, msg->hdr.flags); |
296 | ||
9af84c02 MAL |
297 | return 0; |
298 | } | |
299 | ||
4382138f | 300 | static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg) |
9af84c02 MAL |
301 | { |
302 | struct vhost_user *u = dev->opaque; | |
303 | CharBackend *chr = u->user->chr; | |
304 | uint8_t *p = (uint8_t *) msg; | |
305 | int r, size; | |
306 | ||
025faa87 RK |
307 | r = vhost_user_read_header(dev, msg); |
308 | if (r < 0) { | |
4382138f | 309 | return r; |
5f6f6664 NN |
310 | } |
311 | ||
312 | /* validate message size is sane */ | |
24e34754 | 313 | if (msg->hdr.size > VHOST_USER_PAYLOAD_SIZE) { |
5f6f6664 | 314 | error_report("Failed to read msg header." |
24e34754 | 315 | " Size %d exceeds the maximum %zu.", msg->hdr.size, |
5f6f6664 | 316 | VHOST_USER_PAYLOAD_SIZE); |
4382138f | 317 | return -EPROTO; |
5f6f6664 NN |
318 | } |
319 | ||
24e34754 | 320 | if (msg->hdr.size) { |
5f6f6664 | 321 | p += VHOST_USER_HDR_SIZE; |
24e34754 | 322 | size = msg->hdr.size; |
5f6f6664 NN |
323 | r = qemu_chr_fe_read_all(chr, p, size); |
324 | if (r != size) { | |
025faa87 | 325 | int saved_errno = errno; |
5f6f6664 | 326 | error_report("Failed to read msg payload." |
24e34754 | 327 | " Read %d instead of %d.", r, msg->hdr.size); |
4382138f | 328 | return r < 0 ? -saved_errno : -EIO; |
5f6f6664 NN |
329 | } |
330 | } | |
331 | ||
4382138f | 332 | return 0; |
5f6f6664 NN |
333 | } |
334 | ||
ca525ce5 | 335 | static int process_message_reply(struct vhost_dev *dev, |
3cf7daf8 | 336 | const VhostUserMsg *msg) |
ca525ce5 | 337 | { |
025faa87 | 338 | int ret; |
60cd1102 | 339 | VhostUserMsg msg_reply; |
ca525ce5 | 340 | |
24e34754 | 341 | if ((msg->hdr.flags & VHOST_USER_NEED_REPLY_MASK) == 0) { |
60cd1102 ZY |
342 | return 0; |
343 | } | |
344 | ||
025faa87 RK |
345 | ret = vhost_user_read(dev, &msg_reply); |
346 | if (ret < 0) { | |
347 | return ret; | |
ca525ce5 PS |
348 | } |
349 | ||
24e34754 | 350 | if (msg_reply.hdr.request != msg->hdr.request) { |
edb40732 | 351 | error_report("Received unexpected msg type. " |
ca525ce5 | 352 | "Expected %d received %d", |
24e34754 | 353 | msg->hdr.request, msg_reply.hdr.request); |
025faa87 | 354 | return -EPROTO; |
ca525ce5 PS |
355 | } |
356 | ||
025faa87 | 357 | return msg_reply.payload.u64 ? -EIO : 0; |
ca525ce5 PS |
358 | } |
359 | ||
0dcb4172 | 360 | static bool vhost_user_per_device_request(VhostUserRequest request) |
21e70425 MAL |
361 | { |
362 | switch (request) { | |
363 | case VHOST_USER_SET_OWNER: | |
60915dc4 | 364 | case VHOST_USER_RESET_OWNER: |
21e70425 MAL |
365 | case VHOST_USER_SET_MEM_TABLE: |
366 | case VHOST_USER_GET_QUEUE_NUM: | |
c5f048d8 | 367 | case VHOST_USER_NET_SET_MTU: |
667e58ae | 368 | case VHOST_USER_RESET_DEVICE: |
920c184f MY |
369 | case VHOST_USER_ADD_MEM_REG: |
370 | case VHOST_USER_REM_MEM_REG: | |
21e70425 MAL |
371 | return true; |
372 | default: | |
373 | return false; | |
374 | } | |
375 | } | |
376 | ||
377 | /* most non-init callers ignore the error */ | |
5f6f6664 NN |
378 | static int vhost_user_write(struct vhost_dev *dev, VhostUserMsg *msg, |
379 | int *fds, int fd_num) | |
380 | { | |
2152f3fe | 381 | struct vhost_user *u = dev->opaque; |
4d0cf552 | 382 | CharBackend *chr = u->user->chr; |
24e34754 | 383 | int ret, size = VHOST_USER_HDR_SIZE + msg->hdr.size; |
5f6f6664 | 384 | |
21e70425 | 385 | /* |
0dcb4172 TL |
386 | * Some devices, like virtio-scsi, are implemented as a single vhost_dev, |
387 | * while others, like virtio-net, contain multiple vhost_devs. For | |
388 | * operations such as configuring device memory mappings or issuing device | |
389 | * resets, which affect the whole device instead of individual VQs, | |
390 | * vhost-user messages should only be sent once. | |
391 | * | |
392 | * Devices with multiple vhost_devs are given an associated dev->vq_index | |
393 | * so per_device requests are only sent if vq_index is 0. | |
21e70425 | 394 | */ |
0dcb4172 TL |
395 | if (vhost_user_per_device_request(msg->hdr.request) |
396 | && dev->vq_index != 0) { | |
24e34754 | 397 | msg->hdr.flags &= ~VHOST_USER_NEED_REPLY_MASK; |
21e70425 MAL |
398 | return 0; |
399 | } | |
400 | ||
6fab2f3f | 401 | if (qemu_chr_fe_set_msgfds(chr, fds, fd_num) < 0) { |
f6b85710 | 402 | error_report("Failed to set msg fds."); |
025faa87 | 403 | return -EINVAL; |
6fab2f3f | 404 | } |
5f6f6664 | 405 | |
f6b85710 MAL |
406 | ret = qemu_chr_fe_write_all(chr, (const uint8_t *) msg, size); |
407 | if (ret != size) { | |
025faa87 | 408 | int saved_errno = errno; |
f6b85710 MAL |
409 | error_report("Failed to write msg." |
410 | " Wrote %d instead of %d.", ret, size); | |
025faa87 | 411 | return ret < 0 ? -saved_errno : -EIO; |
f6b85710 MAL |
412 | } |
413 | ||
6ca6d8ee AB |
414 | trace_vhost_user_write(msg->hdr.request, msg->hdr.flags); |
415 | ||
f6b85710 | 416 | return 0; |
5f6f6664 NN |
417 | } |
418 | ||
bd2e44fe MAL |
419 | int vhost_user_gpu_set_socket(struct vhost_dev *dev, int fd) |
420 | { | |
421 | VhostUserMsg msg = { | |
422 | .hdr.request = VHOST_USER_GPU_SET_SOCKET, | |
423 | .hdr.flags = VHOST_USER_VERSION, | |
424 | }; | |
425 | ||
426 | return vhost_user_write(dev, &msg, &fd, 1); | |
427 | } | |
428 | ||
21e70425 MAL |
429 | static int vhost_user_set_log_base(struct vhost_dev *dev, uint64_t base, |
430 | struct vhost_log *log) | |
b931bfbf | 431 | { |
27598393 | 432 | int fds[VHOST_USER_MAX_RAM_SLOTS]; |
21e70425 MAL |
433 | size_t fd_num = 0; |
434 | bool shmfd = virtio_has_feature(dev->protocol_features, | |
435 | VHOST_USER_PROTOCOL_F_LOG_SHMFD); | |
025faa87 | 436 | int ret; |
21e70425 | 437 | VhostUserMsg msg = { |
24e34754 MT |
438 | .hdr.request = VHOST_USER_SET_LOG_BASE, |
439 | .hdr.flags = VHOST_USER_VERSION, | |
48854f57 | 440 | .payload.log.mmap_size = log->size * sizeof(*(log->log)), |
2b8819c6 | 441 | .payload.log.mmap_offset = 0, |
24e34754 | 442 | .hdr.size = sizeof(msg.payload.log), |
21e70425 MAL |
443 | }; |
444 | ||
c98ac64c YW |
445 | /* Send only once with first queue pair */ |
446 | if (dev->vq_index != 0) { | |
447 | return 0; | |
448 | } | |
449 | ||
21e70425 MAL |
450 | if (shmfd && log->fd != -1) { |
451 | fds[fd_num++] = log->fd; | |
452 | } | |
453 | ||
025faa87 RK |
454 | ret = vhost_user_write(dev, &msg, fds, fd_num); |
455 | if (ret < 0) { | |
456 | return ret; | |
c4843a45 | 457 | } |
21e70425 MAL |
458 | |
459 | if (shmfd) { | |
24e34754 | 460 | msg.hdr.size = 0; |
025faa87 RK |
461 | ret = vhost_user_read(dev, &msg); |
462 | if (ret < 0) { | |
463 | return ret; | |
21e70425 MAL |
464 | } |
465 | ||
24e34754 | 466 | if (msg.hdr.request != VHOST_USER_SET_LOG_BASE) { |
21e70425 MAL |
467 | error_report("Received unexpected msg type. " |
468 | "Expected %d received %d", | |
24e34754 | 469 | VHOST_USER_SET_LOG_BASE, msg.hdr.request); |
025faa87 | 470 | return -EPROTO; |
21e70425 | 471 | } |
b931bfbf | 472 | } |
21e70425 MAL |
473 | |
474 | return 0; | |
b931bfbf CO |
475 | } |
476 | ||
23374a84 RN |
477 | static MemoryRegion *vhost_user_get_mr_data(uint64_t addr, ram_addr_t *offset, |
478 | int *fd) | |
479 | { | |
480 | MemoryRegion *mr; | |
481 | ||
482 | assert((uintptr_t)addr == addr); | |
483 | mr = memory_region_from_host((void *)(uintptr_t)addr, offset); | |
484 | *fd = memory_region_get_fd(mr); | |
4b870dc4 | 485 | *offset += mr->ram_block->fd_offset; |
23374a84 RN |
486 | |
487 | return mr; | |
488 | } | |
489 | ||
ece99091 | 490 | static void vhost_user_fill_msg_region(VhostUserMemoryRegion *dst, |
8d193715 RN |
491 | struct vhost_memory_region *src, |
492 | uint64_t mmap_offset) | |
ece99091 RN |
493 | { |
494 | assert(src != NULL && dst != NULL); | |
495 | dst->userspace_addr = src->userspace_addr; | |
496 | dst->memory_size = src->memory_size; | |
497 | dst->guest_phys_addr = src->guest_phys_addr; | |
8d193715 | 498 | dst->mmap_offset = mmap_offset; |
ece99091 RN |
499 | } |
500 | ||
2d9da9df RN |
501 | static int vhost_user_fill_set_mem_table_msg(struct vhost_user *u, |
502 | struct vhost_dev *dev, | |
503 | VhostUserMsg *msg, | |
504 | int *fds, size_t *fd_num, | |
505 | bool track_ramblocks) | |
506 | { | |
507 | int i, fd; | |
508 | ram_addr_t offset; | |
509 | MemoryRegion *mr; | |
510 | struct vhost_memory_region *reg; | |
ece99091 | 511 | VhostUserMemoryRegion region_buffer; |
2d9da9df RN |
512 | |
513 | msg->hdr.request = VHOST_USER_SET_MEM_TABLE; | |
514 | ||
515 | for (i = 0; i < dev->mem->nregions; ++i) { | |
516 | reg = dev->mem->regions + i; | |
517 | ||
23374a84 | 518 | mr = vhost_user_get_mr_data(reg->userspace_addr, &offset, &fd); |
2d9da9df RN |
519 | if (fd > 0) { |
520 | if (track_ramblocks) { | |
27598393 | 521 | assert(*fd_num < VHOST_MEMORY_BASELINE_NREGIONS); |
2d9da9df RN |
522 | trace_vhost_user_set_mem_table_withfd(*fd_num, mr->name, |
523 | reg->memory_size, | |
524 | reg->guest_phys_addr, | |
525 | reg->userspace_addr, | |
526 | offset); | |
527 | u->region_rb_offset[i] = offset; | |
528 | u->region_rb[i] = mr->ram_block; | |
27598393 | 529 | } else if (*fd_num == VHOST_MEMORY_BASELINE_NREGIONS) { |
2d9da9df | 530 | error_report("Failed preparing vhost-user memory table msg"); |
025faa87 | 531 | return -ENOBUFS; |
2d9da9df | 532 | } |
8d193715 | 533 | vhost_user_fill_msg_region(®ion_buffer, reg, offset); |
ece99091 | 534 | msg->payload.memory.regions[*fd_num] = region_buffer; |
2d9da9df RN |
535 | fds[(*fd_num)++] = fd; |
536 | } else if (track_ramblocks) { | |
537 | u->region_rb_offset[i] = 0; | |
538 | u->region_rb[i] = NULL; | |
539 | } | |
540 | } | |
541 | ||
542 | msg->payload.memory.nregions = *fd_num; | |
543 | ||
544 | if (!*fd_num) { | |
545 | error_report("Failed initializing vhost-user memory map, " | |
546 | "consider using -object memory-backend-file share=on"); | |
025faa87 | 547 | return -EINVAL; |
2d9da9df RN |
548 | } |
549 | ||
550 | msg->hdr.size = sizeof(msg->payload.memory.nregions); | |
551 | msg->hdr.size += sizeof(msg->payload.memory.padding); | |
552 | msg->hdr.size += *fd_num * sizeof(VhostUserMemoryRegion); | |
553 | ||
025faa87 | 554 | return 0; |
2d9da9df RN |
555 | } |
556 | ||
f1aeb14b RN |
557 | static inline bool reg_equal(struct vhost_memory_region *shadow_reg, |
558 | struct vhost_memory_region *vdev_reg) | |
559 | { | |
560 | return shadow_reg->guest_phys_addr == vdev_reg->guest_phys_addr && | |
561 | shadow_reg->userspace_addr == vdev_reg->userspace_addr && | |
562 | shadow_reg->memory_size == vdev_reg->memory_size; | |
563 | } | |
564 | ||
565 | static void scrub_shadow_regions(struct vhost_dev *dev, | |
566 | struct scrub_regions *add_reg, | |
567 | int *nr_add_reg, | |
568 | struct scrub_regions *rem_reg, | |
569 | int *nr_rem_reg, uint64_t *shadow_pcb, | |
570 | bool track_ramblocks) | |
571 | { | |
572 | struct vhost_user *u = dev->opaque; | |
27598393 | 573 | bool found[VHOST_USER_MAX_RAM_SLOTS] = {}; |
f1aeb14b RN |
574 | struct vhost_memory_region *reg, *shadow_reg; |
575 | int i, j, fd, add_idx = 0, rm_idx = 0, fd_num = 0; | |
576 | ram_addr_t offset; | |
577 | MemoryRegion *mr; | |
578 | bool matching; | |
579 | ||
580 | /* | |
581 | * Find memory regions present in our shadow state which are not in | |
582 | * the device's current memory state. | |
583 | * | |
584 | * Mark regions in both the shadow and device state as "found". | |
585 | */ | |
586 | for (i = 0; i < u->num_shadow_regions; i++) { | |
587 | shadow_reg = &u->shadow_regions[i]; | |
588 | matching = false; | |
589 | ||
590 | for (j = 0; j < dev->mem->nregions; j++) { | |
591 | reg = &dev->mem->regions[j]; | |
592 | ||
593 | mr = vhost_user_get_mr_data(reg->userspace_addr, &offset, &fd); | |
594 | ||
595 | if (reg_equal(shadow_reg, reg)) { | |
596 | matching = true; | |
597 | found[j] = true; | |
598 | if (track_ramblocks) { | |
599 | /* | |
600 | * Reset postcopy client bases, region_rb, and | |
601 | * region_rb_offset in case regions are removed. | |
602 | */ | |
603 | if (fd > 0) { | |
604 | u->region_rb_offset[j] = offset; | |
605 | u->region_rb[j] = mr->ram_block; | |
606 | shadow_pcb[j] = u->postcopy_client_bases[i]; | |
607 | } else { | |
608 | u->region_rb_offset[j] = 0; | |
609 | u->region_rb[j] = NULL; | |
610 | } | |
611 | } | |
612 | break; | |
613 | } | |
614 | } | |
615 | ||
616 | /* | |
617 | * If the region was not found in the current device memory state | |
618 | * create an entry for it in the removed list. | |
619 | */ | |
620 | if (!matching) { | |
621 | rem_reg[rm_idx].region = shadow_reg; | |
622 | rem_reg[rm_idx++].reg_idx = i; | |
623 | } | |
624 | } | |
625 | ||
626 | /* | |
627 | * For regions not marked "found", create entries in the added list. | |
628 | * | |
629 | * Note their indexes in the device memory state and the indexes of their | |
630 | * file descriptors. | |
631 | */ | |
632 | for (i = 0; i < dev->mem->nregions; i++) { | |
633 | reg = &dev->mem->regions[i]; | |
8b616bee | 634 | vhost_user_get_mr_data(reg->userspace_addr, &offset, &fd); |
f1aeb14b RN |
635 | if (fd > 0) { |
636 | ++fd_num; | |
637 | } | |
638 | ||
639 | /* | |
640 | * If the region was in both the shadow and device state we don't | |
641 | * need to send a VHOST_USER_ADD_MEM_REG message for it. | |
642 | */ | |
643 | if (found[i]) { | |
644 | continue; | |
645 | } | |
646 | ||
647 | add_reg[add_idx].region = reg; | |
648 | add_reg[add_idx].reg_idx = i; | |
649 | add_reg[add_idx++].fd_idx = fd_num; | |
650 | } | |
651 | *nr_rem_reg = rm_idx; | |
652 | *nr_add_reg = add_idx; | |
653 | ||
654 | return; | |
655 | } | |
656 | ||
657 | static int send_remove_regions(struct vhost_dev *dev, | |
658 | struct scrub_regions *remove_reg, | |
659 | int nr_rem_reg, VhostUserMsg *msg, | |
660 | bool reply_supported) | |
661 | { | |
662 | struct vhost_user *u = dev->opaque; | |
663 | struct vhost_memory_region *shadow_reg; | |
664 | int i, fd, shadow_reg_idx, ret; | |
665 | ram_addr_t offset; | |
666 | VhostUserMemoryRegion region_buffer; | |
667 | ||
668 | /* | |
669 | * The regions in remove_reg appear in the same order they do in the | |
670 | * shadow table. Therefore we can minimize memory copies by iterating | |
671 | * through remove_reg backwards. | |
672 | */ | |
673 | for (i = nr_rem_reg - 1; i >= 0; i--) { | |
674 | shadow_reg = remove_reg[i].region; | |
675 | shadow_reg_idx = remove_reg[i].reg_idx; | |
676 | ||
677 | vhost_user_get_mr_data(shadow_reg->userspace_addr, &offset, &fd); | |
678 | ||
679 | if (fd > 0) { | |
680 | msg->hdr.request = VHOST_USER_REM_MEM_REG; | |
8d193715 | 681 | vhost_user_fill_msg_region(®ion_buffer, shadow_reg, 0); |
f1aeb14b RN |
682 | msg->payload.mem_reg.region = region_buffer; |
683 | ||
a81d8d4a | 684 | ret = vhost_user_write(dev, msg, NULL, 0); |
025faa87 RK |
685 | if (ret < 0) { |
686 | return ret; | |
f1aeb14b RN |
687 | } |
688 | ||
689 | if (reply_supported) { | |
690 | ret = process_message_reply(dev, msg); | |
691 | if (ret) { | |
692 | return ret; | |
693 | } | |
694 | } | |
695 | } | |
696 | ||
697 | /* | |
698 | * At this point we know the backend has unmapped the region. It is now | |
699 | * safe to remove it from the shadow table. | |
700 | */ | |
701 | memmove(&u->shadow_regions[shadow_reg_idx], | |
702 | &u->shadow_regions[shadow_reg_idx + 1], | |
703 | sizeof(struct vhost_memory_region) * | |
4fdecf05 | 704 | (u->num_shadow_regions - shadow_reg_idx - 1)); |
f1aeb14b RN |
705 | u->num_shadow_regions--; |
706 | } | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | static int send_add_regions(struct vhost_dev *dev, | |
712 | struct scrub_regions *add_reg, int nr_add_reg, | |
713 | VhostUserMsg *msg, uint64_t *shadow_pcb, | |
714 | bool reply_supported, bool track_ramblocks) | |
715 | { | |
716 | struct vhost_user *u = dev->opaque; | |
717 | int i, fd, ret, reg_idx, reg_fd_idx; | |
718 | struct vhost_memory_region *reg; | |
719 | MemoryRegion *mr; | |
720 | ram_addr_t offset; | |
721 | VhostUserMsg msg_reply; | |
722 | VhostUserMemoryRegion region_buffer; | |
723 | ||
724 | for (i = 0; i < nr_add_reg; i++) { | |
725 | reg = add_reg[i].region; | |
726 | reg_idx = add_reg[i].reg_idx; | |
727 | reg_fd_idx = add_reg[i].fd_idx; | |
728 | ||
729 | mr = vhost_user_get_mr_data(reg->userspace_addr, &offset, &fd); | |
730 | ||
731 | if (fd > 0) { | |
732 | if (track_ramblocks) { | |
733 | trace_vhost_user_set_mem_table_withfd(reg_fd_idx, mr->name, | |
734 | reg->memory_size, | |
735 | reg->guest_phys_addr, | |
736 | reg->userspace_addr, | |
737 | offset); | |
738 | u->region_rb_offset[reg_idx] = offset; | |
739 | u->region_rb[reg_idx] = mr->ram_block; | |
740 | } | |
741 | msg->hdr.request = VHOST_USER_ADD_MEM_REG; | |
8d193715 | 742 | vhost_user_fill_msg_region(®ion_buffer, reg, offset); |
f1aeb14b | 743 | msg->payload.mem_reg.region = region_buffer; |
f1aeb14b | 744 | |
025faa87 RK |
745 | ret = vhost_user_write(dev, msg, &fd, 1); |
746 | if (ret < 0) { | |
747 | return ret; | |
f1aeb14b RN |
748 | } |
749 | ||
750 | if (track_ramblocks) { | |
751 | uint64_t reply_gpa; | |
752 | ||
025faa87 RK |
753 | ret = vhost_user_read(dev, &msg_reply); |
754 | if (ret < 0) { | |
755 | return ret; | |
f1aeb14b RN |
756 | } |
757 | ||
758 | reply_gpa = msg_reply.payload.mem_reg.region.guest_phys_addr; | |
759 | ||
760 | if (msg_reply.hdr.request != VHOST_USER_ADD_MEM_REG) { | |
761 | error_report("%s: Received unexpected msg type." | |
762 | "Expected %d received %d", __func__, | |
763 | VHOST_USER_ADD_MEM_REG, | |
764 | msg_reply.hdr.request); | |
025faa87 | 765 | return -EPROTO; |
f1aeb14b RN |
766 | } |
767 | ||
768 | /* | |
769 | * We're using the same structure, just reusing one of the | |
770 | * fields, so it should be the same size. | |
771 | */ | |
772 | if (msg_reply.hdr.size != msg->hdr.size) { | |
773 | error_report("%s: Unexpected size for postcopy reply " | |
774 | "%d vs %d", __func__, msg_reply.hdr.size, | |
775 | msg->hdr.size); | |
025faa87 | 776 | return -EPROTO; |
f1aeb14b RN |
777 | } |
778 | ||
779 | /* Get the postcopy client base from the backend's reply. */ | |
780 | if (reply_gpa == dev->mem->regions[reg_idx].guest_phys_addr) { | |
781 | shadow_pcb[reg_idx] = | |
782 | msg_reply.payload.mem_reg.region.userspace_addr; | |
783 | trace_vhost_user_set_mem_table_postcopy( | |
784 | msg_reply.payload.mem_reg.region.userspace_addr, | |
785 | msg->payload.mem_reg.region.userspace_addr, | |
786 | reg_fd_idx, reg_idx); | |
787 | } else { | |
788 | error_report("%s: invalid postcopy reply for region. " | |
789 | "Got guest physical address %" PRIX64 ", expected " | |
790 | "%" PRIX64, __func__, reply_gpa, | |
791 | dev->mem->regions[reg_idx].guest_phys_addr); | |
025faa87 | 792 | return -EPROTO; |
f1aeb14b RN |
793 | } |
794 | } else if (reply_supported) { | |
795 | ret = process_message_reply(dev, msg); | |
796 | if (ret) { | |
797 | return ret; | |
798 | } | |
799 | } | |
800 | } else if (track_ramblocks) { | |
801 | u->region_rb_offset[reg_idx] = 0; | |
802 | u->region_rb[reg_idx] = NULL; | |
803 | } | |
804 | ||
805 | /* | |
806 | * At this point, we know the backend has mapped in the new | |
807 | * region, if the region has a valid file descriptor. | |
808 | * | |
809 | * The region should now be added to the shadow table. | |
810 | */ | |
811 | u->shadow_regions[u->num_shadow_regions].guest_phys_addr = | |
812 | reg->guest_phys_addr; | |
813 | u->shadow_regions[u->num_shadow_regions].userspace_addr = | |
814 | reg->userspace_addr; | |
815 | u->shadow_regions[u->num_shadow_regions].memory_size = | |
816 | reg->memory_size; | |
817 | u->num_shadow_regions++; | |
818 | } | |
819 | ||
820 | return 0; | |
821 | } | |
822 | ||
823 | static int vhost_user_add_remove_regions(struct vhost_dev *dev, | |
824 | VhostUserMsg *msg, | |
825 | bool reply_supported, | |
826 | bool track_ramblocks) | |
827 | { | |
828 | struct vhost_user *u = dev->opaque; | |
27598393 RN |
829 | struct scrub_regions add_reg[VHOST_USER_MAX_RAM_SLOTS]; |
830 | struct scrub_regions rem_reg[VHOST_USER_MAX_RAM_SLOTS]; | |
831 | uint64_t shadow_pcb[VHOST_USER_MAX_RAM_SLOTS] = {}; | |
f1aeb14b | 832 | int nr_add_reg, nr_rem_reg; |
025faa87 | 833 | int ret; |
f1aeb14b | 834 | |
3009edff | 835 | msg->hdr.size = sizeof(msg->payload.mem_reg); |
f1aeb14b RN |
836 | |
837 | /* Find the regions which need to be removed or added. */ | |
838 | scrub_shadow_regions(dev, add_reg, &nr_add_reg, rem_reg, &nr_rem_reg, | |
839 | shadow_pcb, track_ramblocks); | |
840 | ||
025faa87 RK |
841 | if (nr_rem_reg) { |
842 | ret = send_remove_regions(dev, rem_reg, nr_rem_reg, msg, | |
843 | reply_supported); | |
844 | if (ret < 0) { | |
845 | goto err; | |
846 | } | |
f1aeb14b RN |
847 | } |
848 | ||
025faa87 RK |
849 | if (nr_add_reg) { |
850 | ret = send_add_regions(dev, add_reg, nr_add_reg, msg, shadow_pcb, | |
851 | reply_supported, track_ramblocks); | |
852 | if (ret < 0) { | |
853 | goto err; | |
854 | } | |
f1aeb14b RN |
855 | } |
856 | ||
857 | if (track_ramblocks) { | |
858 | memcpy(u->postcopy_client_bases, shadow_pcb, | |
27598393 | 859 | sizeof(uint64_t) * VHOST_USER_MAX_RAM_SLOTS); |
f1aeb14b RN |
860 | /* |
861 | * Now we've registered this with the postcopy code, we ack to the | |
862 | * client, because now we're in the position to be able to deal with | |
863 | * any faults it generates. | |
864 | */ | |
865 | /* TODO: Use this for failure cases as well with a bad value. */ | |
866 | msg->hdr.size = sizeof(msg->payload.u64); | |
867 | msg->payload.u64 = 0; /* OK */ | |
868 | ||
025faa87 RK |
869 | ret = vhost_user_write(dev, msg, NULL, 0); |
870 | if (ret < 0) { | |
871 | return ret; | |
f1aeb14b RN |
872 | } |
873 | } | |
874 | ||
875 | return 0; | |
876 | ||
877 | err: | |
878 | if (track_ramblocks) { | |
879 | memcpy(u->postcopy_client_bases, shadow_pcb, | |
27598393 | 880 | sizeof(uint64_t) * VHOST_USER_MAX_RAM_SLOTS); |
f1aeb14b RN |
881 | } |
882 | ||
025faa87 | 883 | return ret; |
f1aeb14b RN |
884 | } |
885 | ||
55d754b3 | 886 | static int vhost_user_set_mem_table_postcopy(struct vhost_dev *dev, |
f1aeb14b RN |
887 | struct vhost_memory *mem, |
888 | bool reply_supported, | |
889 | bool config_mem_slots) | |
55d754b3 | 890 | { |
9bb38019 | 891 | struct vhost_user *u = dev->opaque; |
27598393 | 892 | int fds[VHOST_MEMORY_BASELINE_NREGIONS]; |
55d754b3 | 893 | size_t fd_num = 0; |
9bb38019 DDAG |
894 | VhostUserMsg msg_reply; |
895 | int region_i, msg_i; | |
025faa87 | 896 | int ret; |
9bb38019 | 897 | |
55d754b3 | 898 | VhostUserMsg msg = { |
55d754b3 DDAG |
899 | .hdr.flags = VHOST_USER_VERSION, |
900 | }; | |
901 | ||
905125d0 DDAG |
902 | if (u->region_rb_len < dev->mem->nregions) { |
903 | u->region_rb = g_renew(RAMBlock*, u->region_rb, dev->mem->nregions); | |
904 | u->region_rb_offset = g_renew(ram_addr_t, u->region_rb_offset, | |
905 | dev->mem->nregions); | |
906 | memset(&(u->region_rb[u->region_rb_len]), '\0', | |
907 | sizeof(RAMBlock *) * (dev->mem->nregions - u->region_rb_len)); | |
908 | memset(&(u->region_rb_offset[u->region_rb_len]), '\0', | |
909 | sizeof(ram_addr_t) * (dev->mem->nregions - u->region_rb_len)); | |
910 | u->region_rb_len = dev->mem->nregions; | |
911 | } | |
912 | ||
f1aeb14b | 913 | if (config_mem_slots) { |
025faa87 RK |
914 | ret = vhost_user_add_remove_regions(dev, &msg, reply_supported, true); |
915 | if (ret < 0) { | |
916 | return ret; | |
f1aeb14b RN |
917 | } |
918 | } else { | |
025faa87 RK |
919 | ret = vhost_user_fill_set_mem_table_msg(u, dev, &msg, fds, &fd_num, |
920 | true); | |
921 | if (ret < 0) { | |
922 | return ret; | |
f1aeb14b | 923 | } |
55d754b3 | 924 | |
025faa87 RK |
925 | ret = vhost_user_write(dev, &msg, fds, fd_num); |
926 | if (ret < 0) { | |
927 | return ret; | |
f1aeb14b | 928 | } |
55d754b3 | 929 | |
025faa87 RK |
930 | ret = vhost_user_read(dev, &msg_reply); |
931 | if (ret < 0) { | |
932 | return ret; | |
f1aeb14b | 933 | } |
9bb38019 | 934 | |
f1aeb14b RN |
935 | if (msg_reply.hdr.request != VHOST_USER_SET_MEM_TABLE) { |
936 | error_report("%s: Received unexpected msg type." | |
937 | "Expected %d received %d", __func__, | |
938 | VHOST_USER_SET_MEM_TABLE, msg_reply.hdr.request); | |
025faa87 | 939 | return -EPROTO; |
f1aeb14b | 940 | } |
9bb38019 | 941 | |
f1aeb14b RN |
942 | /* |
943 | * We're using the same structure, just reusing one of the | |
944 | * fields, so it should be the same size. | |
945 | */ | |
946 | if (msg_reply.hdr.size != msg.hdr.size) { | |
947 | error_report("%s: Unexpected size for postcopy reply " | |
948 | "%d vs %d", __func__, msg_reply.hdr.size, | |
949 | msg.hdr.size); | |
025faa87 | 950 | return -EPROTO; |
f1aeb14b RN |
951 | } |
952 | ||
953 | memset(u->postcopy_client_bases, 0, | |
27598393 | 954 | sizeof(uint64_t) * VHOST_USER_MAX_RAM_SLOTS); |
f1aeb14b RN |
955 | |
956 | /* | |
957 | * They're in the same order as the regions that were sent | |
958 | * but some of the regions were skipped (above) if they | |
959 | * didn't have fd's | |
960 | */ | |
961 | for (msg_i = 0, region_i = 0; | |
962 | region_i < dev->mem->nregions; | |
963 | region_i++) { | |
964 | if (msg_i < fd_num && | |
965 | msg_reply.payload.memory.regions[msg_i].guest_phys_addr == | |
966 | dev->mem->regions[region_i].guest_phys_addr) { | |
967 | u->postcopy_client_bases[region_i] = | |
968 | msg_reply.payload.memory.regions[msg_i].userspace_addr; | |
969 | trace_vhost_user_set_mem_table_postcopy( | |
970 | msg_reply.payload.memory.regions[msg_i].userspace_addr, | |
971 | msg.payload.memory.regions[msg_i].userspace_addr, | |
972 | msg_i, region_i); | |
973 | msg_i++; | |
974 | } | |
975 | } | |
976 | if (msg_i != fd_num) { | |
977 | error_report("%s: postcopy reply not fully consumed " | |
978 | "%d vs %zd", | |
979 | __func__, msg_i, fd_num); | |
025faa87 | 980 | return -EIO; |
f1aeb14b RN |
981 | } |
982 | ||
983 | /* | |
984 | * Now we've registered this with the postcopy code, we ack to the | |
985 | * client, because now we're in the position to be able to deal | |
986 | * with any faults it generates. | |
987 | */ | |
988 | /* TODO: Use this for failure cases as well with a bad value. */ | |
989 | msg.hdr.size = sizeof(msg.payload.u64); | |
990 | msg.payload.u64 = 0; /* OK */ | |
025faa87 RK |
991 | ret = vhost_user_write(dev, &msg, NULL, 0); |
992 | if (ret < 0) { | |
993 | return ret; | |
9bb38019 | 994 | } |
9bb38019 DDAG |
995 | } |
996 | ||
55d754b3 DDAG |
997 | return 0; |
998 | } | |
999 | ||
94c9cb31 MT |
1000 | static int vhost_user_set_mem_table(struct vhost_dev *dev, |
1001 | struct vhost_memory *mem) | |
1002 | { | |
55d754b3 | 1003 | struct vhost_user *u = dev->opaque; |
27598393 | 1004 | int fds[VHOST_MEMORY_BASELINE_NREGIONS]; |
94c9cb31 | 1005 | size_t fd_num = 0; |
55d754b3 | 1006 | bool do_postcopy = u->postcopy_listen && u->postcopy_fd.handler; |
94c9cb31 | 1007 | bool reply_supported = virtio_has_feature(dev->protocol_features, |
5ce43896 | 1008 | VHOST_USER_PROTOCOL_F_REPLY_ACK); |
f1aeb14b RN |
1009 | bool config_mem_slots = |
1010 | virtio_has_feature(dev->protocol_features, | |
1011 | VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS); | |
025faa87 | 1012 | int ret; |
94c9cb31 | 1013 | |
55d754b3 | 1014 | if (do_postcopy) { |
f1aeb14b RN |
1015 | /* |
1016 | * Postcopy has enough differences that it's best done in it's own | |
55d754b3 DDAG |
1017 | * version |
1018 | */ | |
f1aeb14b RN |
1019 | return vhost_user_set_mem_table_postcopy(dev, mem, reply_supported, |
1020 | config_mem_slots); | |
55d754b3 DDAG |
1021 | } |
1022 | ||
94c9cb31 | 1023 | VhostUserMsg msg = { |
24e34754 | 1024 | .hdr.flags = VHOST_USER_VERSION, |
94c9cb31 MT |
1025 | }; |
1026 | ||
1027 | if (reply_supported) { | |
24e34754 | 1028 | msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; |
94c9cb31 MT |
1029 | } |
1030 | ||
f1aeb14b | 1031 | if (config_mem_slots) { |
025faa87 RK |
1032 | ret = vhost_user_add_remove_regions(dev, &msg, reply_supported, false); |
1033 | if (ret < 0) { | |
1034 | return ret; | |
f1aeb14b RN |
1035 | } |
1036 | } else { | |
025faa87 RK |
1037 | ret = vhost_user_fill_set_mem_table_msg(u, dev, &msg, fds, &fd_num, |
1038 | false); | |
1039 | if (ret < 0) { | |
1040 | return ret; | |
f1aeb14b | 1041 | } |
025faa87 RK |
1042 | |
1043 | ret = vhost_user_write(dev, &msg, fds, fd_num); | |
1044 | if (ret < 0) { | |
1045 | return ret; | |
f1aeb14b | 1046 | } |
94c9cb31 | 1047 | |
f1aeb14b RN |
1048 | if (reply_supported) { |
1049 | return process_message_reply(dev, &msg); | |
1050 | } | |
94c9cb31 MT |
1051 | } |
1052 | ||
1053 | return 0; | |
1054 | } | |
1055 | ||
21e70425 MAL |
1056 | static int vhost_user_set_vring_endian(struct vhost_dev *dev, |
1057 | struct vhost_vring_state *ring) | |
1058 | { | |
5df04f17 FF |
1059 | bool cross_endian = virtio_has_feature(dev->protocol_features, |
1060 | VHOST_USER_PROTOCOL_F_CROSS_ENDIAN); | |
1061 | VhostUserMsg msg = { | |
24e34754 MT |
1062 | .hdr.request = VHOST_USER_SET_VRING_ENDIAN, |
1063 | .hdr.flags = VHOST_USER_VERSION, | |
5df04f17 | 1064 | .payload.state = *ring, |
24e34754 | 1065 | .hdr.size = sizeof(msg.payload.state), |
5df04f17 FF |
1066 | }; |
1067 | ||
1068 | if (!cross_endian) { | |
1069 | error_report("vhost-user trying to send unhandled ioctl"); | |
025faa87 | 1070 | return -ENOTSUP; |
5df04f17 FF |
1071 | } |
1072 | ||
025faa87 | 1073 | return vhost_user_write(dev, &msg, NULL, 0); |
21e70425 | 1074 | } |
5f6f6664 | 1075 | |
21e70425 MAL |
1076 | static int vhost_set_vring(struct vhost_dev *dev, |
1077 | unsigned long int request, | |
1078 | struct vhost_vring_state *ring) | |
1079 | { | |
1080 | VhostUserMsg msg = { | |
24e34754 MT |
1081 | .hdr.request = request, |
1082 | .hdr.flags = VHOST_USER_VERSION, | |
7f4a930e | 1083 | .payload.state = *ring, |
24e34754 | 1084 | .hdr.size = sizeof(msg.payload.state), |
21e70425 MAL |
1085 | }; |
1086 | ||
025faa87 | 1087 | return vhost_user_write(dev, &msg, NULL, 0); |
21e70425 MAL |
1088 | } |
1089 | ||
1090 | static int vhost_user_set_vring_num(struct vhost_dev *dev, | |
1091 | struct vhost_vring_state *ring) | |
1092 | { | |
1093 | return vhost_set_vring(dev, VHOST_USER_SET_VRING_NUM, ring); | |
1094 | } | |
1095 | ||
0b0af4d6 | 1096 | static void vhost_user_host_notifier_free(VhostUserHostNotifier *n) |
44866521 | 1097 | { |
0b0af4d6 | 1098 | assert(n && n->unmap_addr); |
8e3b0cbb | 1099 | munmap(n->unmap_addr, qemu_real_host_page_size()); |
0b0af4d6 XL |
1100 | n->unmap_addr = NULL; |
1101 | } | |
1102 | ||
503e3554 AB |
1103 | /* |
1104 | * clean-up function for notifier, will finally free the structure | |
1105 | * under rcu. | |
1106 | */ | |
1107 | static void vhost_user_host_notifier_remove(VhostUserHostNotifier *n, | |
1108 | VirtIODevice *vdev) | |
0b0af4d6 | 1109 | { |
e867144b | 1110 | if (n->addr) { |
0b0af4d6 | 1111 | if (vdev) { |
503e3554 | 1112 | virtio_queue_set_host_notifier_mr(vdev, n->idx, &n->mr, false); |
0b0af4d6 XL |
1113 | } |
1114 | assert(!n->unmap_addr); | |
1115 | n->unmap_addr = n->addr; | |
1116 | n->addr = NULL; | |
1117 | call_rcu(n, vhost_user_host_notifier_free, rcu); | |
44866521 TB |
1118 | } |
1119 | } | |
1120 | ||
21e70425 MAL |
1121 | static int vhost_user_set_vring_base(struct vhost_dev *dev, |
1122 | struct vhost_vring_state *ring) | |
1123 | { | |
1124 | return vhost_set_vring(dev, VHOST_USER_SET_VRING_BASE, ring); | |
1125 | } | |
1126 | ||
1127 | static int vhost_user_set_vring_enable(struct vhost_dev *dev, int enable) | |
1128 | { | |
dc3db6ad | 1129 | int i; |
21e70425 | 1130 | |
923e2d98 | 1131 | if (!virtio_has_feature(dev->features, VHOST_USER_F_PROTOCOL_FEATURES)) { |
025faa87 | 1132 | return -EINVAL; |
5f6f6664 NN |
1133 | } |
1134 | ||
dc3db6ad | 1135 | for (i = 0; i < dev->nvqs; ++i) { |
025faa87 | 1136 | int ret; |
dc3db6ad MT |
1137 | struct vhost_vring_state state = { |
1138 | .index = dev->vq_index + i, | |
1139 | .num = enable, | |
1140 | }; | |
1141 | ||
025faa87 RK |
1142 | ret = vhost_set_vring(dev, VHOST_USER_SET_VRING_ENABLE, &state); |
1143 | if (ret < 0) { | |
1144 | /* | |
1145 | * Restoring the previous state is likely infeasible, as well as | |
1146 | * proceeding regardless the error, so just bail out and hope for | |
1147 | * the device-level recovery. | |
1148 | */ | |
1149 | return ret; | |
1150 | } | |
dc3db6ad | 1151 | } |
21e70425 | 1152 | |
dc3db6ad MT |
1153 | return 0; |
1154 | } | |
21e70425 | 1155 | |
503e3554 AB |
1156 | static VhostUserHostNotifier *fetch_notifier(VhostUserState *u, |
1157 | int idx) | |
1158 | { | |
1159 | if (idx >= u->notifiers->len) { | |
1160 | return NULL; | |
1161 | } | |
1162 | return g_ptr_array_index(u->notifiers, idx); | |
1163 | } | |
1164 | ||
21e70425 MAL |
1165 | static int vhost_user_get_vring_base(struct vhost_dev *dev, |
1166 | struct vhost_vring_state *ring) | |
1167 | { | |
025faa87 | 1168 | int ret; |
21e70425 | 1169 | VhostUserMsg msg = { |
24e34754 MT |
1170 | .hdr.request = VHOST_USER_GET_VRING_BASE, |
1171 | .hdr.flags = VHOST_USER_VERSION, | |
7f4a930e | 1172 | .payload.state = *ring, |
24e34754 | 1173 | .hdr.size = sizeof(msg.payload.state), |
21e70425 | 1174 | }; |
0b0af4d6 | 1175 | struct vhost_user *u = dev->opaque; |
21e70425 | 1176 | |
503e3554 AB |
1177 | VhostUserHostNotifier *n = fetch_notifier(u->user, ring->index); |
1178 | if (n) { | |
1179 | vhost_user_host_notifier_remove(n, dev->vdev); | |
1180 | } | |
44866521 | 1181 | |
025faa87 RK |
1182 | ret = vhost_user_write(dev, &msg, NULL, 0); |
1183 | if (ret < 0) { | |
1184 | return ret; | |
c4843a45 | 1185 | } |
21e70425 | 1186 | |
025faa87 RK |
1187 | ret = vhost_user_read(dev, &msg); |
1188 | if (ret < 0) { | |
1189 | return ret; | |
5f6f6664 NN |
1190 | } |
1191 | ||
24e34754 | 1192 | if (msg.hdr.request != VHOST_USER_GET_VRING_BASE) { |
21e70425 | 1193 | error_report("Received unexpected msg type. Expected %d received %d", |
24e34754 | 1194 | VHOST_USER_GET_VRING_BASE, msg.hdr.request); |
025faa87 | 1195 | return -EPROTO; |
21e70425 | 1196 | } |
5f6f6664 | 1197 | |
24e34754 | 1198 | if (msg.hdr.size != sizeof(msg.payload.state)) { |
21e70425 | 1199 | error_report("Received bad msg size."); |
025faa87 | 1200 | return -EPROTO; |
5f6f6664 NN |
1201 | } |
1202 | ||
7f4a930e | 1203 | *ring = msg.payload.state; |
21e70425 | 1204 | |
5f6f6664 NN |
1205 | return 0; |
1206 | } | |
1207 | ||
21e70425 MAL |
1208 | static int vhost_set_vring_file(struct vhost_dev *dev, |
1209 | VhostUserRequest request, | |
1210 | struct vhost_vring_file *file) | |
c2bea314 | 1211 | { |
27598393 | 1212 | int fds[VHOST_USER_MAX_RAM_SLOTS]; |
9a78a5dd | 1213 | size_t fd_num = 0; |
c2bea314 | 1214 | VhostUserMsg msg = { |
24e34754 MT |
1215 | .hdr.request = request, |
1216 | .hdr.flags = VHOST_USER_VERSION, | |
7f4a930e | 1217 | .payload.u64 = file->index & VHOST_USER_VRING_IDX_MASK, |
24e34754 | 1218 | .hdr.size = sizeof(msg.payload.u64), |
c2bea314 MAL |
1219 | }; |
1220 | ||
21e70425 MAL |
1221 | if (ioeventfd_enabled() && file->fd > 0) { |
1222 | fds[fd_num++] = file->fd; | |
1223 | } else { | |
7f4a930e | 1224 | msg.payload.u64 |= VHOST_USER_VRING_NOFD_MASK; |
9a78a5dd MAL |
1225 | } |
1226 | ||
025faa87 | 1227 | return vhost_user_write(dev, &msg, fds, fd_num); |
21e70425 | 1228 | } |
9a78a5dd | 1229 | |
21e70425 MAL |
1230 | static int vhost_user_set_vring_kick(struct vhost_dev *dev, |
1231 | struct vhost_vring_file *file) | |
1232 | { | |
1233 | return vhost_set_vring_file(dev, VHOST_USER_SET_VRING_KICK, file); | |
1234 | } | |
1235 | ||
1236 | static int vhost_user_set_vring_call(struct vhost_dev *dev, | |
1237 | struct vhost_vring_file *file) | |
1238 | { | |
1239 | return vhost_set_vring_file(dev, VHOST_USER_SET_VRING_CALL, file); | |
1240 | } | |
1241 | ||
60dc3c5b KK |
1242 | static int vhost_user_set_vring_err(struct vhost_dev *dev, |
1243 | struct vhost_vring_file *file) | |
1244 | { | |
1245 | return vhost_set_vring_file(dev, VHOST_USER_SET_VRING_ERR, file); | |
1246 | } | |
21e70425 MAL |
1247 | |
1248 | static int vhost_user_get_u64(struct vhost_dev *dev, int request, uint64_t *u64) | |
1249 | { | |
025faa87 | 1250 | int ret; |
21e70425 | 1251 | VhostUserMsg msg = { |
24e34754 MT |
1252 | .hdr.request = request, |
1253 | .hdr.flags = VHOST_USER_VERSION, | |
21e70425 MAL |
1254 | }; |
1255 | ||
0dcb4172 | 1256 | if (vhost_user_per_device_request(request) && dev->vq_index != 0) { |
21e70425 | 1257 | return 0; |
9a78a5dd | 1258 | } |
c2bea314 | 1259 | |
025faa87 RK |
1260 | ret = vhost_user_write(dev, &msg, NULL, 0); |
1261 | if (ret < 0) { | |
1262 | return ret; | |
c4843a45 | 1263 | } |
21e70425 | 1264 | |
025faa87 RK |
1265 | ret = vhost_user_read(dev, &msg); |
1266 | if (ret < 0) { | |
1267 | return ret; | |
21e70425 MAL |
1268 | } |
1269 | ||
24e34754 | 1270 | if (msg.hdr.request != request) { |
21e70425 | 1271 | error_report("Received unexpected msg type. Expected %d received %d", |
24e34754 | 1272 | request, msg.hdr.request); |
025faa87 | 1273 | return -EPROTO; |
21e70425 MAL |
1274 | } |
1275 | ||
24e34754 | 1276 | if (msg.hdr.size != sizeof(msg.payload.u64)) { |
21e70425 | 1277 | error_report("Received bad msg size."); |
025faa87 | 1278 | return -EPROTO; |
21e70425 MAL |
1279 | } |
1280 | ||
7f4a930e | 1281 | *u64 = msg.payload.u64; |
21e70425 MAL |
1282 | |
1283 | return 0; | |
1284 | } | |
1285 | ||
1286 | static int vhost_user_get_features(struct vhost_dev *dev, uint64_t *features) | |
1287 | { | |
f2a6e6c4 KW |
1288 | if (vhost_user_get_u64(dev, VHOST_USER_GET_FEATURES, features) < 0) { |
1289 | return -EPROTO; | |
1290 | } | |
1291 | ||
1292 | return 0; | |
21e70425 MAL |
1293 | } |
1294 | ||
699f2e53 DP |
1295 | static int enforce_reply(struct vhost_dev *dev, |
1296 | const VhostUserMsg *msg) | |
1297 | { | |
1298 | uint64_t dummy; | |
1299 | ||
1300 | if (msg->hdr.flags & VHOST_USER_NEED_REPLY_MASK) { | |
1301 | return process_message_reply(dev, msg); | |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * We need to wait for a reply but the backend does not | |
1306 | * support replies for the command we just sent. | |
1307 | * Send VHOST_USER_GET_FEATURES which makes all backends | |
1308 | * send a reply. | |
1309 | */ | |
1310 | return vhost_user_get_features(dev, &dummy); | |
1311 | } | |
1312 | ||
1313 | static int vhost_user_set_vring_addr(struct vhost_dev *dev, | |
1314 | struct vhost_vring_addr *addr) | |
1315 | { | |
025faa87 | 1316 | int ret; |
699f2e53 DP |
1317 | VhostUserMsg msg = { |
1318 | .hdr.request = VHOST_USER_SET_VRING_ADDR, | |
1319 | .hdr.flags = VHOST_USER_VERSION, | |
1320 | .payload.addr = *addr, | |
1321 | .hdr.size = sizeof(msg.payload.addr), | |
1322 | }; | |
1323 | ||
1324 | bool reply_supported = virtio_has_feature(dev->protocol_features, | |
1325 | VHOST_USER_PROTOCOL_F_REPLY_ACK); | |
1326 | ||
1327 | /* | |
1328 | * wait for a reply if logging is enabled to make sure | |
1329 | * backend is actually logging changes | |
1330 | */ | |
1331 | bool wait_for_reply = addr->flags & (1 << VHOST_VRING_F_LOG); | |
1332 | ||
1333 | if (reply_supported && wait_for_reply) { | |
1334 | msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; | |
1335 | } | |
1336 | ||
025faa87 RK |
1337 | ret = vhost_user_write(dev, &msg, NULL, 0); |
1338 | if (ret < 0) { | |
1339 | return ret; | |
699f2e53 DP |
1340 | } |
1341 | ||
1342 | if (wait_for_reply) { | |
1343 | return enforce_reply(dev, &msg); | |
1344 | } | |
1345 | ||
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | static int vhost_user_set_u64(struct vhost_dev *dev, int request, uint64_t u64, | |
1350 | bool wait_for_reply) | |
1351 | { | |
1352 | VhostUserMsg msg = { | |
1353 | .hdr.request = request, | |
1354 | .hdr.flags = VHOST_USER_VERSION, | |
1355 | .payload.u64 = u64, | |
1356 | .hdr.size = sizeof(msg.payload.u64), | |
1357 | }; | |
025faa87 | 1358 | int ret; |
699f2e53 DP |
1359 | |
1360 | if (wait_for_reply) { | |
1361 | bool reply_supported = virtio_has_feature(dev->protocol_features, | |
1362 | VHOST_USER_PROTOCOL_F_REPLY_ACK); | |
1363 | if (reply_supported) { | |
1364 | msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; | |
1365 | } | |
1366 | } | |
1367 | ||
025faa87 RK |
1368 | ret = vhost_user_write(dev, &msg, NULL, 0); |
1369 | if (ret < 0) { | |
1370 | return ret; | |
699f2e53 DP |
1371 | } |
1372 | ||
1373 | if (wait_for_reply) { | |
1374 | return enforce_reply(dev, &msg); | |
1375 | } | |
1376 | ||
1377 | return 0; | |
1378 | } | |
1379 | ||
923b8921 YW |
1380 | static int vhost_user_set_status(struct vhost_dev *dev, uint8_t status) |
1381 | { | |
1382 | return vhost_user_set_u64(dev, VHOST_USER_SET_STATUS, status, false); | |
1383 | } | |
1384 | ||
1385 | static int vhost_user_get_status(struct vhost_dev *dev, uint8_t *status) | |
1386 | { | |
1387 | uint64_t value; | |
1388 | int ret; | |
1389 | ||
1390 | ret = vhost_user_get_u64(dev, VHOST_USER_GET_STATUS, &value); | |
1391 | if (ret < 0) { | |
1392 | return ret; | |
1393 | } | |
1394 | *status = value; | |
1395 | ||
1396 | return 0; | |
1397 | } | |
1398 | ||
1399 | static int vhost_user_add_status(struct vhost_dev *dev, uint8_t status) | |
1400 | { | |
1401 | uint8_t s; | |
1402 | int ret; | |
1403 | ||
1404 | ret = vhost_user_get_status(dev, &s); | |
1405 | if (ret < 0) { | |
1406 | return ret; | |
1407 | } | |
1408 | ||
1409 | if ((s & status) == status) { | |
1410 | return 0; | |
1411 | } | |
1412 | s |= status; | |
1413 | ||
1414 | return vhost_user_set_status(dev, s); | |
1415 | } | |
1416 | ||
699f2e53 DP |
1417 | static int vhost_user_set_features(struct vhost_dev *dev, |
1418 | uint64_t features) | |
1419 | { | |
1420 | /* | |
1421 | * wait for a reply if logging is enabled to make sure | |
1422 | * backend is actually logging changes | |
1423 | */ | |
1424 | bool log_enabled = features & (0x1ULL << VHOST_F_LOG_ALL); | |
923b8921 | 1425 | int ret; |
699f2e53 | 1426 | |
02b61f38 AB |
1427 | /* |
1428 | * We need to include any extra backend only feature bits that | |
1429 | * might be needed by our device. Currently this includes the | |
1430 | * VHOST_USER_F_PROTOCOL_FEATURES bit for enabling protocol | |
1431 | * features. | |
1432 | */ | |
923b8921 | 1433 | ret = vhost_user_set_u64(dev, VHOST_USER_SET_FEATURES, |
02b61f38 | 1434 | features | dev->backend_features, |
699f2e53 | 1435 | log_enabled); |
923b8921 YW |
1436 | |
1437 | if (virtio_has_feature(dev->protocol_features, | |
1438 | VHOST_USER_PROTOCOL_F_STATUS)) { | |
1439 | if (!ret) { | |
1440 | return vhost_user_add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK); | |
1441 | } | |
1442 | } | |
1443 | ||
1444 | return ret; | |
699f2e53 DP |
1445 | } |
1446 | ||
1447 | static int vhost_user_set_protocol_features(struct vhost_dev *dev, | |
1448 | uint64_t features) | |
1449 | { | |
1450 | return vhost_user_set_u64(dev, VHOST_USER_SET_PROTOCOL_FEATURES, features, | |
1451 | false); | |
1452 | } | |
1453 | ||
21e70425 MAL |
1454 | static int vhost_user_set_owner(struct vhost_dev *dev) |
1455 | { | |
1456 | VhostUserMsg msg = { | |
24e34754 MT |
1457 | .hdr.request = VHOST_USER_SET_OWNER, |
1458 | .hdr.flags = VHOST_USER_VERSION, | |
21e70425 MAL |
1459 | }; |
1460 | ||
025faa87 | 1461 | return vhost_user_write(dev, &msg, NULL, 0); |
21e70425 MAL |
1462 | } |
1463 | ||
6b0eff1a RN |
1464 | static int vhost_user_get_max_memslots(struct vhost_dev *dev, |
1465 | uint64_t *max_memslots) | |
1466 | { | |
1467 | uint64_t backend_max_memslots; | |
1468 | int err; | |
1469 | ||
1470 | err = vhost_user_get_u64(dev, VHOST_USER_GET_MAX_MEM_SLOTS, | |
1471 | &backend_max_memslots); | |
1472 | if (err < 0) { | |
1473 | return err; | |
1474 | } | |
1475 | ||
1476 | *max_memslots = backend_max_memslots; | |
1477 | ||
1478 | return 0; | |
1479 | } | |
1480 | ||
21e70425 MAL |
1481 | static int vhost_user_reset_device(struct vhost_dev *dev) |
1482 | { | |
1483 | VhostUserMsg msg = { | |
24e34754 | 1484 | .hdr.flags = VHOST_USER_VERSION, |
21e70425 MAL |
1485 | }; |
1486 | ||
d91d57e6 RN |
1487 | msg.hdr.request = virtio_has_feature(dev->protocol_features, |
1488 | VHOST_USER_PROTOCOL_F_RESET_DEVICE) | |
1489 | ? VHOST_USER_RESET_DEVICE | |
1490 | : VHOST_USER_RESET_OWNER; | |
1491 | ||
025faa87 | 1492 | return vhost_user_write(dev, &msg, NULL, 0); |
c2bea314 MAL |
1493 | } |
1494 | ||
f8ed3648 | 1495 | static int vhost_user_backend_handle_config_change(struct vhost_dev *dev) |
4c3e257b | 1496 | { |
025faa87 RK |
1497 | if (!dev->config_ops || !dev->config_ops->vhost_dev_config_notifier) { |
1498 | return -ENOSYS; | |
4c3e257b CL |
1499 | } |
1500 | ||
025faa87 | 1501 | return dev->config_ops->vhost_dev_config_notifier(dev); |
4c3e257b CL |
1502 | } |
1503 | ||
503e3554 AB |
1504 | /* |
1505 | * Fetch or create the notifier for a given idx. Newly created | |
1506 | * notifiers are added to the pointer array that tracks them. | |
1507 | */ | |
1508 | static VhostUserHostNotifier *fetch_or_create_notifier(VhostUserState *u, | |
1509 | int idx) | |
1510 | { | |
1511 | VhostUserHostNotifier *n = NULL; | |
1512 | if (idx >= u->notifiers->len) { | |
b595d627 | 1513 | g_ptr_array_set_size(u->notifiers, idx + 1); |
503e3554 AB |
1514 | } |
1515 | ||
1516 | n = g_ptr_array_index(u->notifiers, idx); | |
1517 | if (!n) { | |
bd437c96 YW |
1518 | /* |
1519 | * In case notification arrive out-of-order, | |
1520 | * make room for current index. | |
1521 | */ | |
1522 | g_ptr_array_remove_index(u->notifiers, idx); | |
503e3554 AB |
1523 | n = g_new0(VhostUserHostNotifier, 1); |
1524 | n->idx = idx; | |
1525 | g_ptr_array_insert(u->notifiers, idx, n); | |
1526 | trace_vhost_user_create_notifier(idx, n); | |
1527 | } | |
1528 | ||
1529 | return n; | |
1530 | } | |
1531 | ||
f8ed3648 | 1532 | static int vhost_user_backend_handle_vring_host_notifier(struct vhost_dev *dev, |
44866521 TB |
1533 | VhostUserVringArea *area, |
1534 | int fd) | |
1535 | { | |
1536 | int queue_idx = area->u64 & VHOST_USER_VRING_IDX_MASK; | |
8e3b0cbb | 1537 | size_t page_size = qemu_real_host_page_size(); |
44866521 TB |
1538 | struct vhost_user *u = dev->opaque; |
1539 | VhostUserState *user = u->user; | |
1540 | VirtIODevice *vdev = dev->vdev; | |
1541 | VhostUserHostNotifier *n; | |
1542 | void *addr; | |
1543 | char *name; | |
1544 | ||
1545 | if (!virtio_has_feature(dev->protocol_features, | |
1546 | VHOST_USER_PROTOCOL_F_HOST_NOTIFIER) || | |
1547 | vdev == NULL || queue_idx >= virtio_get_num_queues(vdev)) { | |
025faa87 | 1548 | return -EINVAL; |
44866521 TB |
1549 | } |
1550 | ||
503e3554 AB |
1551 | /* |
1552 | * Fetch notifier and invalidate any old data before setting up | |
1553 | * new mapped address. | |
1554 | */ | |
1555 | n = fetch_or_create_notifier(user, queue_idx); | |
1556 | vhost_user_host_notifier_remove(n, vdev); | |
44866521 TB |
1557 | |
1558 | if (area->u64 & VHOST_USER_VRING_NOFD_MASK) { | |
1559 | return 0; | |
1560 | } | |
1561 | ||
1562 | /* Sanity check. */ | |
1563 | if (area->size != page_size) { | |
025faa87 | 1564 | return -EINVAL; |
44866521 TB |
1565 | } |
1566 | ||
1567 | addr = mmap(NULL, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
1568 | fd, area->offset); | |
1569 | if (addr == MAP_FAILED) { | |
025faa87 | 1570 | return -EFAULT; |
44866521 TB |
1571 | } |
1572 | ||
1573 | name = g_strdup_printf("vhost-user/host-notifier@%p mmaps[%d]", | |
1574 | user, queue_idx); | |
0b0af4d6 | 1575 | if (!n->mr.ram) { /* Don't init again after suspend. */ |
a1ed9ef1 XL |
1576 | memory_region_init_ram_device_ptr(&n->mr, OBJECT(vdev), name, |
1577 | page_size, addr); | |
0b0af4d6 XL |
1578 | } else { |
1579 | n->mr.ram_block->host = addr; | |
1580 | } | |
44866521 TB |
1581 | g_free(name); |
1582 | ||
1583 | if (virtio_queue_set_host_notifier_mr(vdev, queue_idx, &n->mr, true)) { | |
1f89d3b9 | 1584 | object_unparent(OBJECT(&n->mr)); |
44866521 | 1585 | munmap(addr, page_size); |
025faa87 | 1586 | return -ENXIO; |
44866521 TB |
1587 | } |
1588 | ||
1589 | n->addr = addr; | |
44866521 TB |
1590 | |
1591 | return 0; | |
1592 | } | |
1593 | ||
16094766 AE |
1594 | static int |
1595 | vhost_user_backend_handle_shared_object_add(struct vhost_dev *dev, | |
1596 | VhostUserShared *object) | |
1597 | { | |
1598 | QemuUUID uuid; | |
1599 | ||
1600 | memcpy(uuid.data, object->uuid, sizeof(object->uuid)); | |
1601 | return virtio_add_vhost_device(&uuid, dev); | |
1602 | } | |
1603 | ||
1604 | static int | |
1605 | vhost_user_backend_handle_shared_object_remove(VhostUserShared *object) | |
1606 | { | |
1607 | QemuUUID uuid; | |
1608 | ||
1609 | memcpy(uuid.data, object->uuid, sizeof(object->uuid)); | |
1610 | return virtio_remove_resource(&uuid); | |
1611 | } | |
1612 | ||
1613 | static bool vhost_user_send_resp(QIOChannel *ioc, VhostUserHeader *hdr, | |
1614 | VhostUserPayload *payload, Error **errp) | |
1615 | { | |
1616 | struct iovec iov[] = { | |
1617 | { .iov_base = hdr, .iov_len = VHOST_USER_HDR_SIZE }, | |
1618 | { .iov_base = payload, .iov_len = hdr->size }, | |
1619 | }; | |
1620 | ||
1621 | hdr->flags &= ~VHOST_USER_NEED_REPLY_MASK; | |
1622 | hdr->flags |= VHOST_USER_REPLY_MASK; | |
1623 | ||
1624 | return !qio_channel_writev_all(ioc, iov, ARRAY_SIZE(iov), errp); | |
1625 | } | |
1626 | ||
1627 | static bool | |
1628 | vhost_user_backend_send_dmabuf_fd(QIOChannel *ioc, VhostUserHeader *hdr, | |
1629 | VhostUserPayload *payload, Error **errp) | |
1630 | { | |
1631 | hdr->size = sizeof(payload->u64); | |
1632 | return vhost_user_send_resp(ioc, hdr, payload, errp); | |
1633 | } | |
1634 | ||
1635 | int vhost_user_get_shared_object(struct vhost_dev *dev, unsigned char *uuid, | |
1636 | int *dmabuf_fd) | |
1637 | { | |
1638 | struct vhost_user *u = dev->opaque; | |
1639 | CharBackend *chr = u->user->chr; | |
1640 | int ret; | |
1641 | VhostUserMsg msg = { | |
1642 | .hdr.request = VHOST_USER_GET_SHARED_OBJECT, | |
1643 | .hdr.flags = VHOST_USER_VERSION, | |
1644 | }; | |
1645 | memcpy(msg.payload.object.uuid, uuid, sizeof(msg.payload.object.uuid)); | |
1646 | ||
1647 | ret = vhost_user_write(dev, &msg, NULL, 0); | |
1648 | if (ret < 0) { | |
1649 | return ret; | |
1650 | } | |
1651 | ||
1652 | ret = vhost_user_read(dev, &msg); | |
1653 | if (ret < 0) { | |
1654 | return ret; | |
1655 | } | |
1656 | ||
1657 | if (msg.hdr.request != VHOST_USER_GET_SHARED_OBJECT) { | |
1658 | error_report("Received unexpected msg type. " | |
1659 | "Expected %d received %d", | |
1660 | VHOST_USER_GET_SHARED_OBJECT, msg.hdr.request); | |
1661 | return -EPROTO; | |
1662 | } | |
1663 | ||
1664 | *dmabuf_fd = qemu_chr_fe_get_msgfd(chr); | |
1665 | if (*dmabuf_fd < 0) { | |
1666 | error_report("Failed to get dmabuf fd"); | |
1667 | return -EIO; | |
1668 | } | |
1669 | ||
1670 | return 0; | |
1671 | } | |
1672 | ||
1673 | static int | |
1674 | vhost_user_backend_handle_shared_object_lookup(struct vhost_user *u, | |
1675 | QIOChannel *ioc, | |
1676 | VhostUserHeader *hdr, | |
1677 | VhostUserPayload *payload) | |
1678 | { | |
1679 | QemuUUID uuid; | |
1680 | CharBackend *chr = u->user->chr; | |
1681 | Error *local_err = NULL; | |
1682 | int dmabuf_fd = -1; | |
1683 | int fd_num = 0; | |
1684 | ||
1685 | memcpy(uuid.data, payload->object.uuid, sizeof(payload->object.uuid)); | |
1686 | ||
1687 | payload->u64 = 0; | |
1688 | switch (virtio_object_type(&uuid)) { | |
1689 | case TYPE_DMABUF: | |
1690 | dmabuf_fd = virtio_lookup_dmabuf(&uuid); | |
1691 | break; | |
1692 | case TYPE_VHOST_DEV: | |
1693 | { | |
1694 | struct vhost_dev *dev = virtio_lookup_vhost_device(&uuid); | |
1695 | if (dev == NULL) { | |
1696 | payload->u64 = -EINVAL; | |
1697 | break; | |
1698 | } | |
1699 | int ret = vhost_user_get_shared_object(dev, uuid.data, &dmabuf_fd); | |
1700 | if (ret < 0) { | |
1701 | payload->u64 = ret; | |
1702 | } | |
1703 | break; | |
1704 | } | |
1705 | case TYPE_INVALID: | |
1706 | payload->u64 = -EINVAL; | |
1707 | break; | |
1708 | } | |
1709 | ||
1710 | if (dmabuf_fd != -1) { | |
1711 | fd_num++; | |
1712 | } | |
1713 | ||
1714 | if (qemu_chr_fe_set_msgfds(chr, &dmabuf_fd, fd_num) < 0) { | |
1715 | error_report("Failed to set msg fds."); | |
1716 | payload->u64 = -EINVAL; | |
1717 | } | |
1718 | ||
1719 | if (!vhost_user_backend_send_dmabuf_fd(ioc, hdr, payload, &local_err)) { | |
1720 | error_report_err(local_err); | |
1721 | return -EINVAL; | |
1722 | } | |
1723 | ||
1724 | return 0; | |
1725 | } | |
1726 | ||
f8ed3648 | 1727 | static void close_backend_channel(struct vhost_user *u) |
de62e494 | 1728 | { |
f8ed3648 MP |
1729 | g_source_destroy(u->backend_src); |
1730 | g_source_unref(u->backend_src); | |
1731 | u->backend_src = NULL; | |
1732 | object_unref(OBJECT(u->backend_ioc)); | |
1733 | u->backend_ioc = NULL; | |
de62e494 GK |
1734 | } |
1735 | ||
f8ed3648 | 1736 | static gboolean backend_read(QIOChannel *ioc, GIOCondition condition, |
57dc0217 | 1737 | gpointer opaque) |
4bbeeba0 MAL |
1738 | { |
1739 | struct vhost_dev *dev = opaque; | |
1740 | struct vhost_user *u = dev->opaque; | |
69aff030 MT |
1741 | VhostUserHeader hdr = { 0, }; |
1742 | VhostUserPayload payload = { 0, }; | |
57dc0217 GK |
1743 | Error *local_err = NULL; |
1744 | gboolean rc = G_SOURCE_CONTINUE; | |
1745 | int ret = 0; | |
1f3a4519 | 1746 | struct iovec iov; |
57dc0217 GK |
1747 | g_autofree int *fd = NULL; |
1748 | size_t fdsize = 0; | |
1749 | int i; | |
5f57fbea | 1750 | |
4bbeeba0 | 1751 | /* Read header */ |
1f3a4519 TB |
1752 | iov.iov_base = &hdr; |
1753 | iov.iov_len = VHOST_USER_HDR_SIZE; | |
1754 | ||
57dc0217 GK |
1755 | if (qio_channel_readv_full_all(ioc, &iov, 1, &fd, &fdsize, &local_err)) { |
1756 | error_report_err(local_err); | |
4bbeeba0 MAL |
1757 | goto err; |
1758 | } | |
1759 | ||
69aff030 | 1760 | if (hdr.size > VHOST_USER_PAYLOAD_SIZE) { |
4bbeeba0 | 1761 | error_report("Failed to read msg header." |
69aff030 | 1762 | " Size %d exceeds the maximum %zu.", hdr.size, |
4bbeeba0 MAL |
1763 | VHOST_USER_PAYLOAD_SIZE); |
1764 | goto err; | |
1765 | } | |
1766 | ||
1767 | /* Read payload */ | |
57dc0217 GK |
1768 | if (qio_channel_read_all(ioc, (char *) &payload, hdr.size, &local_err)) { |
1769 | error_report_err(local_err); | |
4bbeeba0 MAL |
1770 | goto err; |
1771 | } | |
1772 | ||
69aff030 | 1773 | switch (hdr.request) { |
a84ec993 | 1774 | case VHOST_USER_BACKEND_IOTLB_MSG: |
69aff030 | 1775 | ret = vhost_backend_handle_iotlb_msg(dev, &payload.iotlb); |
6dcdd06e | 1776 | break; |
a84ec993 | 1777 | case VHOST_USER_BACKEND_CONFIG_CHANGE_MSG: |
f8ed3648 | 1778 | ret = vhost_user_backend_handle_config_change(dev); |
4c3e257b | 1779 | break; |
a84ec993 | 1780 | case VHOST_USER_BACKEND_VRING_HOST_NOTIFIER_MSG: |
f8ed3648 | 1781 | ret = vhost_user_backend_handle_vring_host_notifier(dev, &payload.area, |
57dc0217 | 1782 | fd ? fd[0] : -1); |
44866521 | 1783 | break; |
16094766 AE |
1784 | case VHOST_USER_BACKEND_SHARED_OBJECT_ADD: |
1785 | ret = vhost_user_backend_handle_shared_object_add(dev, &payload.object); | |
1786 | break; | |
1787 | case VHOST_USER_BACKEND_SHARED_OBJECT_REMOVE: | |
1788 | ret = vhost_user_backend_handle_shared_object_remove(&payload.object); | |
1789 | break; | |
1790 | case VHOST_USER_BACKEND_SHARED_OBJECT_LOOKUP: | |
1791 | ret = vhost_user_backend_handle_shared_object_lookup(dev->opaque, ioc, | |
1792 | &hdr, &payload); | |
1793 | break; | |
4bbeeba0 | 1794 | default: |
0fdc465d | 1795 | error_report("Received unexpected msg type: %d.", hdr.request); |
4bbeeba0 MAL |
1796 | ret = -EINVAL; |
1797 | } | |
1798 | ||
1799 | /* | |
1800 | * REPLY_ACK feature handling. Other reply types has to be managed | |
1801 | * directly in their request handlers. | |
1802 | */ | |
69aff030 | 1803 | if (hdr.flags & VHOST_USER_NEED_REPLY_MASK) { |
69aff030 MT |
1804 | payload.u64 = !!ret; |
1805 | hdr.size = sizeof(payload.u64); | |
1806 | ||
16094766 | 1807 | if (!vhost_user_send_resp(ioc, &hdr, &payload, &local_err)) { |
57dc0217 | 1808 | error_report_err(local_err); |
4bbeeba0 MAL |
1809 | goto err; |
1810 | } | |
1811 | } | |
1812 | ||
9e06080b | 1813 | goto fdcleanup; |
4bbeeba0 MAL |
1814 | |
1815 | err: | |
f8ed3648 | 1816 | close_backend_channel(u); |
57dc0217 | 1817 | rc = G_SOURCE_REMOVE; |
9e06080b GK |
1818 | |
1819 | fdcleanup: | |
57dc0217 GK |
1820 | if (fd) { |
1821 | for (i = 0; i < fdsize; i++) { | |
5f57fbea TB |
1822 | close(fd[i]); |
1823 | } | |
1f3a4519 | 1824 | } |
57dc0217 | 1825 | return rc; |
4bbeeba0 MAL |
1826 | } |
1827 | ||
f8ed3648 | 1828 | static int vhost_setup_backend_channel(struct vhost_dev *dev) |
4bbeeba0 MAL |
1829 | { |
1830 | VhostUserMsg msg = { | |
a84ec993 | 1831 | .hdr.request = VHOST_USER_SET_BACKEND_REQ_FD, |
24e34754 | 1832 | .hdr.flags = VHOST_USER_VERSION, |
4bbeeba0 MAL |
1833 | }; |
1834 | struct vhost_user *u = dev->opaque; | |
1835 | int sv[2], ret = 0; | |
1836 | bool reply_supported = virtio_has_feature(dev->protocol_features, | |
1837 | VHOST_USER_PROTOCOL_F_REPLY_ACK); | |
57dc0217 GK |
1838 | Error *local_err = NULL; |
1839 | QIOChannel *ioc; | |
4bbeeba0 MAL |
1840 | |
1841 | if (!virtio_has_feature(dev->protocol_features, | |
a84ec993 | 1842 | VHOST_USER_PROTOCOL_F_BACKEND_REQ)) { |
4bbeeba0 MAL |
1843 | return 0; |
1844 | } | |
1845 | ||
9cbda7b3 | 1846 | if (qemu_socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) { |
025faa87 | 1847 | int saved_errno = errno; |
4bbeeba0 | 1848 | error_report("socketpair() failed"); |
025faa87 | 1849 | return -saved_errno; |
4bbeeba0 MAL |
1850 | } |
1851 | ||
57dc0217 GK |
1852 | ioc = QIO_CHANNEL(qio_channel_socket_new_fd(sv[0], &local_err)); |
1853 | if (!ioc) { | |
1854 | error_report_err(local_err); | |
025faa87 | 1855 | return -ECONNREFUSED; |
57dc0217 | 1856 | } |
f8ed3648 MP |
1857 | u->backend_ioc = ioc; |
1858 | u->backend_src = qio_channel_add_watch_source(u->backend_ioc, | |
f340a59d | 1859 | G_IO_IN | G_IO_HUP, |
f8ed3648 | 1860 | backend_read, dev, NULL, NULL); |
4bbeeba0 MAL |
1861 | |
1862 | if (reply_supported) { | |
24e34754 | 1863 | msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; |
4bbeeba0 MAL |
1864 | } |
1865 | ||
1866 | ret = vhost_user_write(dev, &msg, &sv[1], 1); | |
1867 | if (ret) { | |
1868 | goto out; | |
1869 | } | |
1870 | ||
1871 | if (reply_supported) { | |
1872 | ret = process_message_reply(dev, &msg); | |
1873 | } | |
1874 | ||
1875 | out: | |
1876 | close(sv[1]); | |
1877 | if (ret) { | |
f8ed3648 | 1878 | close_backend_channel(u); |
4bbeeba0 MAL |
1879 | } |
1880 | ||
1881 | return ret; | |
1882 | } | |
1883 | ||
18658a3c | 1884 | #ifdef CONFIG_LINUX |
f82c1116 DDAG |
1885 | /* |
1886 | * Called back from the postcopy fault thread when a fault is received on our | |
1887 | * ufd. | |
1888 | * TODO: This is Linux specific | |
1889 | */ | |
1890 | static int vhost_user_postcopy_fault_handler(struct PostCopyFD *pcfd, | |
1891 | void *ufd) | |
1892 | { | |
375318d0 DDAG |
1893 | struct vhost_dev *dev = pcfd->data; |
1894 | struct vhost_user *u = dev->opaque; | |
1895 | struct uffd_msg *msg = ufd; | |
1896 | uint64_t faultaddr = msg->arg.pagefault.address; | |
1897 | RAMBlock *rb = NULL; | |
1898 | uint64_t rb_offset; | |
1899 | int i; | |
1900 | ||
1901 | trace_vhost_user_postcopy_fault_handler(pcfd->idstr, faultaddr, | |
1902 | dev->mem->nregions); | |
1903 | for (i = 0; i < MIN(dev->mem->nregions, u->region_rb_len); i++) { | |
1904 | trace_vhost_user_postcopy_fault_handler_loop(i, | |
1905 | u->postcopy_client_bases[i], dev->mem->regions[i].memory_size); | |
1906 | if (faultaddr >= u->postcopy_client_bases[i]) { | |
1907 | /* Ofset of the fault address in the vhost region */ | |
1908 | uint64_t region_offset = faultaddr - u->postcopy_client_bases[i]; | |
1909 | if (region_offset < dev->mem->regions[i].memory_size) { | |
1910 | rb_offset = region_offset + u->region_rb_offset[i]; | |
1911 | trace_vhost_user_postcopy_fault_handler_found(i, | |
1912 | region_offset, rb_offset); | |
1913 | rb = u->region_rb[i]; | |
1914 | return postcopy_request_shared_page(pcfd, rb, faultaddr, | |
1915 | rb_offset); | |
1916 | } | |
1917 | } | |
1918 | } | |
1919 | error_report("%s: Failed to find region for fault %" PRIx64, | |
1920 | __func__, faultaddr); | |
1921 | return -1; | |
f82c1116 DDAG |
1922 | } |
1923 | ||
c07e3615 DDAG |
1924 | static int vhost_user_postcopy_waker(struct PostCopyFD *pcfd, RAMBlock *rb, |
1925 | uint64_t offset) | |
1926 | { | |
1927 | struct vhost_dev *dev = pcfd->data; | |
1928 | struct vhost_user *u = dev->opaque; | |
1929 | int i; | |
1930 | ||
1931 | trace_vhost_user_postcopy_waker(qemu_ram_get_idstr(rb), offset); | |
1932 | ||
1933 | if (!u) { | |
1934 | return 0; | |
1935 | } | |
1936 | /* Translate the offset into an address in the clients address space */ | |
1937 | for (i = 0; i < MIN(dev->mem->nregions, u->region_rb_len); i++) { | |
1938 | if (u->region_rb[i] == rb && | |
1939 | offset >= u->region_rb_offset[i] && | |
1940 | offset < (u->region_rb_offset[i] + | |
1941 | dev->mem->regions[i].memory_size)) { | |
1942 | uint64_t client_addr = (offset - u->region_rb_offset[i]) + | |
1943 | u->postcopy_client_bases[i]; | |
1944 | trace_vhost_user_postcopy_waker_found(client_addr); | |
1945 | return postcopy_wake_shared(pcfd, client_addr, rb); | |
1946 | } | |
1947 | } | |
1948 | ||
1949 | trace_vhost_user_postcopy_waker_nomatch(qemu_ram_get_idstr(rb), offset); | |
1950 | return 0; | |
1951 | } | |
18658a3c | 1952 | #endif |
c07e3615 | 1953 | |
d3dff7a5 DDAG |
1954 | /* |
1955 | * Called at the start of an inbound postcopy on reception of the | |
1956 | * 'advise' command. | |
1957 | */ | |
1958 | static int vhost_user_postcopy_advise(struct vhost_dev *dev, Error **errp) | |
1959 | { | |
18658a3c | 1960 | #ifdef CONFIG_LINUX |
d3dff7a5 | 1961 | struct vhost_user *u = dev->opaque; |
4d0cf552 | 1962 | CharBackend *chr = u->user->chr; |
d3dff7a5 | 1963 | int ufd; |
025faa87 | 1964 | int ret; |
d3dff7a5 DDAG |
1965 | VhostUserMsg msg = { |
1966 | .hdr.request = VHOST_USER_POSTCOPY_ADVISE, | |
1967 | .hdr.flags = VHOST_USER_VERSION, | |
1968 | }; | |
1969 | ||
025faa87 RK |
1970 | ret = vhost_user_write(dev, &msg, NULL, 0); |
1971 | if (ret < 0) { | |
d3dff7a5 | 1972 | error_setg(errp, "Failed to send postcopy_advise to vhost"); |
025faa87 | 1973 | return ret; |
d3dff7a5 DDAG |
1974 | } |
1975 | ||
025faa87 RK |
1976 | ret = vhost_user_read(dev, &msg); |
1977 | if (ret < 0) { | |
d3dff7a5 | 1978 | error_setg(errp, "Failed to get postcopy_advise reply from vhost"); |
025faa87 | 1979 | return ret; |
d3dff7a5 DDAG |
1980 | } |
1981 | ||
1982 | if (msg.hdr.request != VHOST_USER_POSTCOPY_ADVISE) { | |
1983 | error_setg(errp, "Unexpected msg type. Expected %d received %d", | |
1984 | VHOST_USER_POSTCOPY_ADVISE, msg.hdr.request); | |
025faa87 | 1985 | return -EPROTO; |
d3dff7a5 DDAG |
1986 | } |
1987 | ||
1988 | if (msg.hdr.size) { | |
1989 | error_setg(errp, "Received bad msg size."); | |
025faa87 | 1990 | return -EPROTO; |
d3dff7a5 DDAG |
1991 | } |
1992 | ufd = qemu_chr_fe_get_msgfd(chr); | |
1993 | if (ufd < 0) { | |
1994 | error_setg(errp, "%s: Failed to get ufd", __func__); | |
025faa87 | 1995 | return -EIO; |
d3dff7a5 | 1996 | } |
ff5927ba | 1997 | qemu_socket_set_nonblock(ufd); |
d3dff7a5 | 1998 | |
f82c1116 DDAG |
1999 | /* register ufd with userfault thread */ |
2000 | u->postcopy_fd.fd = ufd; | |
2001 | u->postcopy_fd.data = dev; | |
2002 | u->postcopy_fd.handler = vhost_user_postcopy_fault_handler; | |
c07e3615 | 2003 | u->postcopy_fd.waker = vhost_user_postcopy_waker; |
f82c1116 DDAG |
2004 | u->postcopy_fd.idstr = "vhost-user"; /* Need to find unique name */ |
2005 | postcopy_register_shared_ufd(&u->postcopy_fd); | |
d3dff7a5 | 2006 | return 0; |
18658a3c PB |
2007 | #else |
2008 | error_setg(errp, "Postcopy not supported on non-Linux systems"); | |
025faa87 | 2009 | return -ENOSYS; |
18658a3c | 2010 | #endif |
d3dff7a5 DDAG |
2011 | } |
2012 | ||
6864a7b5 DDAG |
2013 | /* |
2014 | * Called at the switch to postcopy on reception of the 'listen' command. | |
2015 | */ | |
2016 | static int vhost_user_postcopy_listen(struct vhost_dev *dev, Error **errp) | |
2017 | { | |
2018 | struct vhost_user *u = dev->opaque; | |
2019 | int ret; | |
2020 | VhostUserMsg msg = { | |
2021 | .hdr.request = VHOST_USER_POSTCOPY_LISTEN, | |
2022 | .hdr.flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY_MASK, | |
2023 | }; | |
2024 | u->postcopy_listen = true; | |
025faa87 | 2025 | |
6864a7b5 | 2026 | trace_vhost_user_postcopy_listen(); |
025faa87 RK |
2027 | |
2028 | ret = vhost_user_write(dev, &msg, NULL, 0); | |
2029 | if (ret < 0) { | |
6864a7b5 | 2030 | error_setg(errp, "Failed to send postcopy_listen to vhost"); |
025faa87 | 2031 | return ret; |
6864a7b5 DDAG |
2032 | } |
2033 | ||
2034 | ret = process_message_reply(dev, &msg); | |
2035 | if (ret) { | |
2036 | error_setg(errp, "Failed to receive reply to postcopy_listen"); | |
2037 | return ret; | |
2038 | } | |
2039 | ||
2040 | return 0; | |
2041 | } | |
2042 | ||
46343570 DDAG |
2043 | /* |
2044 | * Called at the end of postcopy | |
2045 | */ | |
2046 | static int vhost_user_postcopy_end(struct vhost_dev *dev, Error **errp) | |
2047 | { | |
2048 | VhostUserMsg msg = { | |
2049 | .hdr.request = VHOST_USER_POSTCOPY_END, | |
2050 | .hdr.flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY_MASK, | |
2051 | }; | |
2052 | int ret; | |
2053 | struct vhost_user *u = dev->opaque; | |
2054 | ||
2055 | trace_vhost_user_postcopy_end_entry(); | |
025faa87 RK |
2056 | |
2057 | ret = vhost_user_write(dev, &msg, NULL, 0); | |
2058 | if (ret < 0) { | |
46343570 | 2059 | error_setg(errp, "Failed to send postcopy_end to vhost"); |
025faa87 | 2060 | return ret; |
46343570 DDAG |
2061 | } |
2062 | ||
2063 | ret = process_message_reply(dev, &msg); | |
2064 | if (ret) { | |
2065 | error_setg(errp, "Failed to receive reply to postcopy_end"); | |
2066 | return ret; | |
2067 | } | |
2068 | postcopy_unregister_shared_ufd(&u->postcopy_fd); | |
c4f75385 | 2069 | close(u->postcopy_fd.fd); |
46343570 DDAG |
2070 | u->postcopy_fd.handler = NULL; |
2071 | ||
2072 | trace_vhost_user_postcopy_end_exit(); | |
2073 | ||
2074 | return 0; | |
2075 | } | |
2076 | ||
9ccbfe14 DDAG |
2077 | static int vhost_user_postcopy_notifier(NotifierWithReturn *notifier, |
2078 | void *opaque) | |
2079 | { | |
2080 | struct PostcopyNotifyData *pnd = opaque; | |
2081 | struct vhost_user *u = container_of(notifier, struct vhost_user, | |
2082 | postcopy_notifier); | |
2083 | struct vhost_dev *dev = u->dev; | |
2084 | ||
2085 | switch (pnd->reason) { | |
2086 | case POSTCOPY_NOTIFY_PROBE: | |
2087 | if (!virtio_has_feature(dev->protocol_features, | |
2088 | VHOST_USER_PROTOCOL_F_PAGEFAULT)) { | |
2089 | /* TODO: Get the device name into this error somehow */ | |
2090 | error_setg(pnd->errp, | |
2091 | "vhost-user backend not capable of postcopy"); | |
2092 | return -ENOENT; | |
2093 | } | |
2094 | break; | |
2095 | ||
d3dff7a5 DDAG |
2096 | case POSTCOPY_NOTIFY_INBOUND_ADVISE: |
2097 | return vhost_user_postcopy_advise(dev, pnd->errp); | |
2098 | ||
6864a7b5 DDAG |
2099 | case POSTCOPY_NOTIFY_INBOUND_LISTEN: |
2100 | return vhost_user_postcopy_listen(dev, pnd->errp); | |
2101 | ||
46343570 DDAG |
2102 | case POSTCOPY_NOTIFY_INBOUND_END: |
2103 | return vhost_user_postcopy_end(dev, pnd->errp); | |
2104 | ||
9ccbfe14 DDAG |
2105 | default: |
2106 | /* We ignore notifications we don't know */ | |
2107 | break; | |
2108 | } | |
2109 | ||
2110 | return 0; | |
2111 | } | |
2112 | ||
28770ff9 KW |
2113 | static int vhost_user_backend_init(struct vhost_dev *dev, void *opaque, |
2114 | Error **errp) | |
5f6f6664 | 2115 | { |
56534930 | 2116 | uint64_t features, ram_slots; |
2152f3fe | 2117 | struct vhost_user *u; |
56534930 | 2118 | VhostUserState *vus = (VhostUserState *) opaque; |
dcb10c00 MT |
2119 | int err; |
2120 | ||
5f6f6664 NN |
2121 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); |
2122 | ||
2152f3fe | 2123 | u = g_new0(struct vhost_user, 1); |
56534930 | 2124 | u->user = vus; |
9ccbfe14 | 2125 | u->dev = dev; |
2152f3fe | 2126 | dev->opaque = u; |
5f6f6664 | 2127 | |
21e70425 | 2128 | err = vhost_user_get_features(dev, &features); |
dcb10c00 | 2129 | if (err < 0) { |
998647dc | 2130 | error_setg_errno(errp, -err, "vhost_backend_init failed"); |
f2a6e6c4 | 2131 | return err; |
dcb10c00 MT |
2132 | } |
2133 | ||
2134 | if (virtio_has_feature(features, VHOST_USER_F_PROTOCOL_FEATURES)) { | |
56534930 AB |
2135 | bool supports_f_config = vus->supports_config || |
2136 | (dev->config_ops && dev->config_ops->vhost_dev_config_notifier); | |
2137 | uint64_t protocol_features; | |
2138 | ||
dcb10c00 MT |
2139 | dev->backend_features |= 1ULL << VHOST_USER_F_PROTOCOL_FEATURES; |
2140 | ||
21e70425 | 2141 | err = vhost_user_get_u64(dev, VHOST_USER_GET_PROTOCOL_FEATURES, |
6dcdd06e | 2142 | &protocol_features); |
dcb10c00 | 2143 | if (err < 0) { |
998647dc | 2144 | error_setg_errno(errp, EPROTO, "vhost_backend_init failed"); |
28770ff9 | 2145 | return -EPROTO; |
dcb10c00 MT |
2146 | } |
2147 | ||
56534930 AB |
2148 | /* |
2149 | * We will use all the protocol features we support - although | |
2150 | * we suppress F_CONFIG if we know QEMUs internal code can not support | |
2151 | * it. | |
2152 | */ | |
2153 | protocol_features &= VHOST_USER_PROTOCOL_FEATURE_MASK; | |
2154 | ||
2155 | if (supports_f_config) { | |
2156 | if (!virtio_has_feature(protocol_features, | |
2157 | VHOST_USER_PROTOCOL_F_CONFIG)) { | |
fb38d0c9 | 2158 | error_setg(errp, "vhost-user device expecting " |
56534930 | 2159 | "VHOST_USER_PROTOCOL_F_CONFIG but the vhost-user backend does " |
fb38d0c9 | 2160 | "not support it."); |
56534930 AB |
2161 | return -EPROTO; |
2162 | } | |
2163 | } else { | |
2164 | if (virtio_has_feature(protocol_features, | |
2165 | VHOST_USER_PROTOCOL_F_CONFIG)) { | |
90e31232 AE |
2166 | warn_report("vhost-user backend supports " |
2167 | "VHOST_USER_PROTOCOL_F_CONFIG but QEMU does not."); | |
56534930 AB |
2168 | protocol_features &= ~(1ULL << VHOST_USER_PROTOCOL_F_CONFIG); |
2169 | } | |
1c3e5a26 MC |
2170 | } |
2171 | ||
56534930 AB |
2172 | /* final set of protocol features */ |
2173 | dev->protocol_features = protocol_features; | |
21e70425 | 2174 | err = vhost_user_set_protocol_features(dev, dev->protocol_features); |
dcb10c00 | 2175 | if (err < 0) { |
998647dc | 2176 | error_setg_errno(errp, EPROTO, "vhost_backend_init failed"); |
28770ff9 | 2177 | return -EPROTO; |
dcb10c00 | 2178 | } |
e2051e9e YL |
2179 | |
2180 | /* query the max queues we support if backend supports Multiple Queue */ | |
2181 | if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_MQ)) { | |
21e70425 MAL |
2182 | err = vhost_user_get_u64(dev, VHOST_USER_GET_QUEUE_NUM, |
2183 | &dev->max_queues); | |
e2051e9e | 2184 | if (err < 0) { |
998647dc | 2185 | error_setg_errno(errp, EPROTO, "vhost_backend_init failed"); |
28770ff9 | 2186 | return -EPROTO; |
e2051e9e | 2187 | } |
84affad1 KW |
2188 | } else { |
2189 | dev->max_queues = 1; | |
e2051e9e | 2190 | } |
84affad1 | 2191 | |
c90bd505 | 2192 | if (dev->num_queues && dev->max_queues < dev->num_queues) { |
28770ff9 KW |
2193 | error_setg(errp, "The maximum number of queues supported by the " |
2194 | "backend is %" PRIu64, dev->max_queues); | |
c90bd505 KW |
2195 | return -EINVAL; |
2196 | } | |
6dcdd06e MC |
2197 | |
2198 | if (virtio_has_feature(features, VIRTIO_F_IOMMU_PLATFORM) && | |
2199 | !(virtio_has_feature(dev->protocol_features, | |
a84ec993 | 2200 | VHOST_USER_PROTOCOL_F_BACKEND_REQ) && |
6dcdd06e MC |
2201 | virtio_has_feature(dev->protocol_features, |
2202 | VHOST_USER_PROTOCOL_F_REPLY_ACK))) { | |
28770ff9 | 2203 | error_setg(errp, "IOMMU support requires reply-ack and " |
f8ed3648 | 2204 | "backend-req protocol features."); |
28770ff9 | 2205 | return -EINVAL; |
6dcdd06e | 2206 | } |
6b0eff1a RN |
2207 | |
2208 | /* get max memory regions if backend supports configurable RAM slots */ | |
2209 | if (!virtio_has_feature(dev->protocol_features, | |
2210 | VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS)) { | |
27598393 | 2211 | u->user->memory_slots = VHOST_MEMORY_BASELINE_NREGIONS; |
6b0eff1a RN |
2212 | } else { |
2213 | err = vhost_user_get_max_memslots(dev, &ram_slots); | |
2214 | if (err < 0) { | |
998647dc | 2215 | error_setg_errno(errp, EPROTO, "vhost_backend_init failed"); |
28770ff9 | 2216 | return -EPROTO; |
6b0eff1a RN |
2217 | } |
2218 | ||
2219 | if (ram_slots < u->user->memory_slots) { | |
28770ff9 KW |
2220 | error_setg(errp, "The backend specified a max ram slots limit " |
2221 | "of %" PRIu64", when the prior validated limit was " | |
2222 | "%d. This limit should never decrease.", ram_slots, | |
2223 | u->user->memory_slots); | |
2224 | return -EINVAL; | |
6b0eff1a RN |
2225 | } |
2226 | ||
27598393 | 2227 | u->user->memory_slots = MIN(ram_slots, VHOST_USER_MAX_RAM_SLOTS); |
6b0eff1a | 2228 | } |
dcb10c00 MT |
2229 | } |
2230 | ||
d2fc4402 MAL |
2231 | if (dev->migration_blocker == NULL && |
2232 | !virtio_has_feature(dev->protocol_features, | |
2233 | VHOST_USER_PROTOCOL_F_LOG_SHMFD)) { | |
2234 | error_setg(&dev->migration_blocker, | |
2235 | "Migration disabled: vhost-user backend lacks " | |
2236 | "VHOST_USER_PROTOCOL_F_LOG_SHMFD feature."); | |
2237 | } | |
2238 | ||
67b3965e | 2239 | if (dev->vq_index == 0) { |
f8ed3648 | 2240 | err = vhost_setup_backend_channel(dev); |
67b3965e | 2241 | if (err < 0) { |
998647dc | 2242 | error_setg_errno(errp, EPROTO, "vhost_backend_init failed"); |
28770ff9 | 2243 | return -EPROTO; |
67b3965e | 2244 | } |
4bbeeba0 MAL |
2245 | } |
2246 | ||
9ccbfe14 DDAG |
2247 | u->postcopy_notifier.notify = vhost_user_postcopy_notifier; |
2248 | postcopy_add_notifier(&u->postcopy_notifier); | |
2249 | ||
5f6f6664 NN |
2250 | return 0; |
2251 | } | |
2252 | ||
4d0cf552 | 2253 | static int vhost_user_backend_cleanup(struct vhost_dev *dev) |
5f6f6664 | 2254 | { |
2152f3fe MAL |
2255 | struct vhost_user *u; |
2256 | ||
5f6f6664 NN |
2257 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); |
2258 | ||
2152f3fe | 2259 | u = dev->opaque; |
9ccbfe14 DDAG |
2260 | if (u->postcopy_notifier.notify) { |
2261 | postcopy_remove_notifier(&u->postcopy_notifier); | |
2262 | u->postcopy_notifier.notify = NULL; | |
2263 | } | |
c4f75385 IM |
2264 | u->postcopy_listen = false; |
2265 | if (u->postcopy_fd.handler) { | |
2266 | postcopy_unregister_shared_ufd(&u->postcopy_fd); | |
2267 | close(u->postcopy_fd.fd); | |
2268 | u->postcopy_fd.handler = NULL; | |
2269 | } | |
f8ed3648 MP |
2270 | if (u->backend_ioc) { |
2271 | close_backend_channel(u); | |
4bbeeba0 | 2272 | } |
905125d0 DDAG |
2273 | g_free(u->region_rb); |
2274 | u->region_rb = NULL; | |
2275 | g_free(u->region_rb_offset); | |
2276 | u->region_rb_offset = NULL; | |
2277 | u->region_rb_len = 0; | |
2152f3fe | 2278 | g_free(u); |
5f6f6664 NN |
2279 | dev->opaque = 0; |
2280 | ||
2281 | return 0; | |
2282 | } | |
2283 | ||
fc57fd99 YL |
2284 | static int vhost_user_get_vq_index(struct vhost_dev *dev, int idx) |
2285 | { | |
2286 | assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); | |
2287 | ||
2288 | return idx; | |
2289 | } | |
2290 | ||
2ce68e4c IM |
2291 | static int vhost_user_memslots_limit(struct vhost_dev *dev) |
2292 | { | |
6b0eff1a RN |
2293 | struct vhost_user *u = dev->opaque; |
2294 | ||
2295 | return u->user->memory_slots; | |
2ce68e4c IM |
2296 | } |
2297 | ||
1be0ac21 MAL |
2298 | static bool vhost_user_requires_shm_log(struct vhost_dev *dev) |
2299 | { | |
2300 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); | |
2301 | ||
2302 | return virtio_has_feature(dev->protocol_features, | |
2303 | VHOST_USER_PROTOCOL_F_LOG_SHMFD); | |
2304 | } | |
2305 | ||
3e866365 TC |
2306 | static int vhost_user_migration_done(struct vhost_dev *dev, char* mac_addr) |
2307 | { | |
ebf2a499 | 2308 | VhostUserMsg msg = { }; |
3e866365 TC |
2309 | |
2310 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); | |
2311 | ||
2312 | /* If guest supports GUEST_ANNOUNCE do nothing */ | |
2313 | if (virtio_has_feature(dev->acked_features, VIRTIO_NET_F_GUEST_ANNOUNCE)) { | |
2314 | return 0; | |
2315 | } | |
2316 | ||
2317 | /* if backend supports VHOST_USER_PROTOCOL_F_RARP ask it to send the RARP */ | |
2318 | if (virtio_has_feature(dev->protocol_features, | |
2319 | VHOST_USER_PROTOCOL_F_RARP)) { | |
24e34754 MT |
2320 | msg.hdr.request = VHOST_USER_SEND_RARP; |
2321 | msg.hdr.flags = VHOST_USER_VERSION; | |
7f4a930e | 2322 | memcpy((char *)&msg.payload.u64, mac_addr, 6); |
24e34754 | 2323 | msg.hdr.size = sizeof(msg.payload.u64); |
3e866365 | 2324 | |
c4843a45 | 2325 | return vhost_user_write(dev, &msg, NULL, 0); |
3e866365 | 2326 | } |
025faa87 | 2327 | return -ENOTSUP; |
3e866365 TC |
2328 | } |
2329 | ||
c5f048d8 MC |
2330 | static int vhost_user_net_set_mtu(struct vhost_dev *dev, uint16_t mtu) |
2331 | { | |
2332 | VhostUserMsg msg; | |
2333 | bool reply_supported = virtio_has_feature(dev->protocol_features, | |
2334 | VHOST_USER_PROTOCOL_F_REPLY_ACK); | |
025faa87 | 2335 | int ret; |
c5f048d8 MC |
2336 | |
2337 | if (!(dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_NET_MTU))) { | |
2338 | return 0; | |
2339 | } | |
2340 | ||
24e34754 | 2341 | msg.hdr.request = VHOST_USER_NET_SET_MTU; |
c5f048d8 | 2342 | msg.payload.u64 = mtu; |
24e34754 MT |
2343 | msg.hdr.size = sizeof(msg.payload.u64); |
2344 | msg.hdr.flags = VHOST_USER_VERSION; | |
c5f048d8 | 2345 | if (reply_supported) { |
24e34754 | 2346 | msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; |
c5f048d8 MC |
2347 | } |
2348 | ||
025faa87 RK |
2349 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2350 | if (ret < 0) { | |
2351 | return ret; | |
c5f048d8 MC |
2352 | } |
2353 | ||
f8ed3648 | 2354 | /* If reply_ack supported, backend has to ack specified MTU is valid */ |
c5f048d8 | 2355 | if (reply_supported) { |
3cf7daf8 | 2356 | return process_message_reply(dev, &msg); |
c5f048d8 MC |
2357 | } |
2358 | ||
2359 | return 0; | |
2360 | } | |
2361 | ||
6dcdd06e MC |
2362 | static int vhost_user_send_device_iotlb_msg(struct vhost_dev *dev, |
2363 | struct vhost_iotlb_msg *imsg) | |
2364 | { | |
025faa87 | 2365 | int ret; |
6dcdd06e | 2366 | VhostUserMsg msg = { |
24e34754 MT |
2367 | .hdr.request = VHOST_USER_IOTLB_MSG, |
2368 | .hdr.size = sizeof(msg.payload.iotlb), | |
2369 | .hdr.flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY_MASK, | |
6dcdd06e MC |
2370 | .payload.iotlb = *imsg, |
2371 | }; | |
2372 | ||
025faa87 RK |
2373 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2374 | if (ret < 0) { | |
2375 | return ret; | |
6dcdd06e MC |
2376 | } |
2377 | ||
2378 | return process_message_reply(dev, &msg); | |
2379 | } | |
2380 | ||
2381 | ||
2382 | static void vhost_user_set_iotlb_callback(struct vhost_dev *dev, int enabled) | |
2383 | { | |
2384 | /* No-op as the receive channel is not dedicated to IOTLB messages. */ | |
2385 | } | |
2386 | ||
4c3e257b | 2387 | static int vhost_user_get_config(struct vhost_dev *dev, uint8_t *config, |
50de5138 | 2388 | uint32_t config_len, Error **errp) |
4c3e257b | 2389 | { |
025faa87 | 2390 | int ret; |
4c3e257b | 2391 | VhostUserMsg msg = { |
24e34754 MT |
2392 | .hdr.request = VHOST_USER_GET_CONFIG, |
2393 | .hdr.flags = VHOST_USER_VERSION, | |
2394 | .hdr.size = VHOST_USER_CONFIG_HDR_SIZE + config_len, | |
4c3e257b CL |
2395 | }; |
2396 | ||
1c3e5a26 MC |
2397 | if (!virtio_has_feature(dev->protocol_features, |
2398 | VHOST_USER_PROTOCOL_F_CONFIG)) { | |
50de5138 KW |
2399 | error_setg(errp, "VHOST_USER_PROTOCOL_F_CONFIG not supported"); |
2400 | return -EINVAL; | |
1c3e5a26 MC |
2401 | } |
2402 | ||
50de5138 | 2403 | assert(config_len <= VHOST_USER_MAX_CONFIG_SIZE); |
4c3e257b CL |
2404 | |
2405 | msg.payload.config.offset = 0; | |
2406 | msg.payload.config.size = config_len; | |
025faa87 RK |
2407 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2408 | if (ret < 0) { | |
2409 | error_setg_errno(errp, -ret, "vhost_get_config failed"); | |
2410 | return ret; | |
4c3e257b CL |
2411 | } |
2412 | ||
025faa87 RK |
2413 | ret = vhost_user_read(dev, &msg); |
2414 | if (ret < 0) { | |
2415 | error_setg_errno(errp, -ret, "vhost_get_config failed"); | |
2416 | return ret; | |
4c3e257b CL |
2417 | } |
2418 | ||
24e34754 | 2419 | if (msg.hdr.request != VHOST_USER_GET_CONFIG) { |
50de5138 KW |
2420 | error_setg(errp, |
2421 | "Received unexpected msg type. Expected %d received %d", | |
2422 | VHOST_USER_GET_CONFIG, msg.hdr.request); | |
025faa87 | 2423 | return -EPROTO; |
4c3e257b CL |
2424 | } |
2425 | ||
24e34754 | 2426 | if (msg.hdr.size != VHOST_USER_CONFIG_HDR_SIZE + config_len) { |
50de5138 | 2427 | error_setg(errp, "Received bad msg size."); |
025faa87 | 2428 | return -EPROTO; |
4c3e257b CL |
2429 | } |
2430 | ||
2431 | memcpy(config, msg.payload.config.region, config_len); | |
2432 | ||
2433 | return 0; | |
2434 | } | |
2435 | ||
2436 | static int vhost_user_set_config(struct vhost_dev *dev, const uint8_t *data, | |
2437 | uint32_t offset, uint32_t size, uint32_t flags) | |
2438 | { | |
025faa87 | 2439 | int ret; |
4c3e257b CL |
2440 | uint8_t *p; |
2441 | bool reply_supported = virtio_has_feature(dev->protocol_features, | |
2442 | VHOST_USER_PROTOCOL_F_REPLY_ACK); | |
2443 | ||
2444 | VhostUserMsg msg = { | |
24e34754 MT |
2445 | .hdr.request = VHOST_USER_SET_CONFIG, |
2446 | .hdr.flags = VHOST_USER_VERSION, | |
2447 | .hdr.size = VHOST_USER_CONFIG_HDR_SIZE + size, | |
4c3e257b CL |
2448 | }; |
2449 | ||
1c3e5a26 MC |
2450 | if (!virtio_has_feature(dev->protocol_features, |
2451 | VHOST_USER_PROTOCOL_F_CONFIG)) { | |
025faa87 | 2452 | return -ENOTSUP; |
1c3e5a26 MC |
2453 | } |
2454 | ||
4c3e257b | 2455 | if (reply_supported) { |
24e34754 | 2456 | msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; |
4c3e257b CL |
2457 | } |
2458 | ||
2459 | if (size > VHOST_USER_MAX_CONFIG_SIZE) { | |
025faa87 | 2460 | return -EINVAL; |
4c3e257b CL |
2461 | } |
2462 | ||
2463 | msg.payload.config.offset = offset, | |
2464 | msg.payload.config.size = size, | |
2465 | msg.payload.config.flags = flags, | |
2466 | p = msg.payload.config.region; | |
2467 | memcpy(p, data, size); | |
2468 | ||
025faa87 RK |
2469 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2470 | if (ret < 0) { | |
2471 | return ret; | |
4c3e257b CL |
2472 | } |
2473 | ||
2474 | if (reply_supported) { | |
2475 | return process_message_reply(dev, &msg); | |
2476 | } | |
2477 | ||
2478 | return 0; | |
2479 | } | |
2480 | ||
efbfeb81 GA |
2481 | static int vhost_user_crypto_create_session(struct vhost_dev *dev, |
2482 | void *session_info, | |
2483 | uint64_t *session_id) | |
2484 | { | |
025faa87 | 2485 | int ret; |
efbfeb81 GA |
2486 | bool crypto_session = virtio_has_feature(dev->protocol_features, |
2487 | VHOST_USER_PROTOCOL_F_CRYPTO_SESSION); | |
5c33f978 | 2488 | CryptoDevBackendSessionInfo *backend_info = session_info; |
efbfeb81 GA |
2489 | VhostUserMsg msg = { |
2490 | .hdr.request = VHOST_USER_CREATE_CRYPTO_SESSION, | |
2491 | .hdr.flags = VHOST_USER_VERSION, | |
2492 | .hdr.size = sizeof(msg.payload.session), | |
2493 | }; | |
2494 | ||
2495 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); | |
2496 | ||
2497 | if (!crypto_session) { | |
2498 | error_report("vhost-user trying to send unhandled ioctl"); | |
025faa87 | 2499 | return -ENOTSUP; |
efbfeb81 GA |
2500 | } |
2501 | ||
5c33f978 GM |
2502 | if (backend_info->op_code == VIRTIO_CRYPTO_AKCIPHER_CREATE_SESSION) { |
2503 | CryptoDevBackendAsymSessionInfo *sess = &backend_info->u.asym_sess_info; | |
2504 | size_t keylen; | |
2505 | ||
2506 | memcpy(&msg.payload.session.u.asym.session_setup_data, sess, | |
2507 | sizeof(CryptoDevBackendAsymSessionInfo)); | |
2508 | if (sess->keylen) { | |
2509 | keylen = sizeof(msg.payload.session.u.asym.key); | |
2510 | if (sess->keylen > keylen) { | |
2511 | error_report("Unsupported asymmetric key size"); | |
2512 | return -ENOTSUP; | |
2513 | } | |
2514 | ||
2515 | memcpy(&msg.payload.session.u.asym.key, sess->key, | |
2516 | sess->keylen); | |
2517 | } | |
2518 | } else { | |
2519 | CryptoDevBackendSymSessionInfo *sess = &backend_info->u.sym_sess_info; | |
2520 | size_t keylen; | |
2521 | ||
2522 | memcpy(&msg.payload.session.u.sym.session_setup_data, sess, | |
2523 | sizeof(CryptoDevBackendSymSessionInfo)); | |
2524 | if (sess->key_len) { | |
2525 | keylen = sizeof(msg.payload.session.u.sym.key); | |
2526 | if (sess->key_len > keylen) { | |
2527 | error_report("Unsupported cipher key size"); | |
2528 | return -ENOTSUP; | |
2529 | } | |
2530 | ||
2531 | memcpy(&msg.payload.session.u.sym.key, sess->cipher_key, | |
2532 | sess->key_len); | |
2533 | } | |
2534 | ||
2535 | if (sess->auth_key_len > 0) { | |
2536 | keylen = sizeof(msg.payload.session.u.sym.auth_key); | |
2537 | if (sess->auth_key_len > keylen) { | |
2538 | error_report("Unsupported auth key size"); | |
2539 | return -ENOTSUP; | |
2540 | } | |
2541 | ||
2542 | memcpy(&msg.payload.session.u.sym.auth_key, sess->auth_key, | |
2543 | sess->auth_key_len); | |
2544 | } | |
efbfeb81 | 2545 | } |
5c33f978 GM |
2546 | |
2547 | msg.payload.session.op_code = backend_info->op_code; | |
2548 | msg.payload.session.session_id = backend_info->session_id; | |
025faa87 RK |
2549 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2550 | if (ret < 0) { | |
2551 | error_report("vhost_user_write() return %d, create session failed", | |
2552 | ret); | |
2553 | return ret; | |
efbfeb81 GA |
2554 | } |
2555 | ||
025faa87 RK |
2556 | ret = vhost_user_read(dev, &msg); |
2557 | if (ret < 0) { | |
2558 | error_report("vhost_user_read() return %d, create session failed", | |
2559 | ret); | |
2560 | return ret; | |
efbfeb81 GA |
2561 | } |
2562 | ||
2563 | if (msg.hdr.request != VHOST_USER_CREATE_CRYPTO_SESSION) { | |
2564 | error_report("Received unexpected msg type. Expected %d received %d", | |
2565 | VHOST_USER_CREATE_CRYPTO_SESSION, msg.hdr.request); | |
025faa87 | 2566 | return -EPROTO; |
efbfeb81 GA |
2567 | } |
2568 | ||
2569 | if (msg.hdr.size != sizeof(msg.payload.session)) { | |
2570 | error_report("Received bad msg size."); | |
025faa87 | 2571 | return -EPROTO; |
efbfeb81 GA |
2572 | } |
2573 | ||
2574 | if (msg.payload.session.session_id < 0) { | |
2575 | error_report("Bad session id: %" PRId64 "", | |
2576 | msg.payload.session.session_id); | |
025faa87 | 2577 | return -EINVAL; |
efbfeb81 GA |
2578 | } |
2579 | *session_id = msg.payload.session.session_id; | |
2580 | ||
2581 | return 0; | |
2582 | } | |
2583 | ||
2584 | static int | |
2585 | vhost_user_crypto_close_session(struct vhost_dev *dev, uint64_t session_id) | |
2586 | { | |
025faa87 | 2587 | int ret; |
efbfeb81 GA |
2588 | bool crypto_session = virtio_has_feature(dev->protocol_features, |
2589 | VHOST_USER_PROTOCOL_F_CRYPTO_SESSION); | |
2590 | VhostUserMsg msg = { | |
2591 | .hdr.request = VHOST_USER_CLOSE_CRYPTO_SESSION, | |
2592 | .hdr.flags = VHOST_USER_VERSION, | |
2593 | .hdr.size = sizeof(msg.payload.u64), | |
2594 | }; | |
2595 | msg.payload.u64 = session_id; | |
2596 | ||
2597 | if (!crypto_session) { | |
2598 | error_report("vhost-user trying to send unhandled ioctl"); | |
025faa87 | 2599 | return -ENOTSUP; |
efbfeb81 GA |
2600 | } |
2601 | ||
025faa87 RK |
2602 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2603 | if (ret < 0) { | |
2604 | error_report("vhost_user_write() return %d, close session failed", | |
2605 | ret); | |
2606 | return ret; | |
efbfeb81 GA |
2607 | } |
2608 | ||
2609 | return 0; | |
2610 | } | |
2611 | ||
552b2522 | 2612 | static bool vhost_user_no_private_memslots(struct vhost_dev *dev) |
988a2775 | 2613 | { |
552b2522 | 2614 | return true; |
988a2775 TB |
2615 | } |
2616 | ||
5ad204bf XY |
2617 | static int vhost_user_get_inflight_fd(struct vhost_dev *dev, |
2618 | uint16_t queue_size, | |
2619 | struct vhost_inflight *inflight) | |
2620 | { | |
2621 | void *addr; | |
2622 | int fd; | |
025faa87 | 2623 | int ret; |
5ad204bf XY |
2624 | struct vhost_user *u = dev->opaque; |
2625 | CharBackend *chr = u->user->chr; | |
2626 | VhostUserMsg msg = { | |
2627 | .hdr.request = VHOST_USER_GET_INFLIGHT_FD, | |
2628 | .hdr.flags = VHOST_USER_VERSION, | |
2629 | .payload.inflight.num_queues = dev->nvqs, | |
2630 | .payload.inflight.queue_size = queue_size, | |
2631 | .hdr.size = sizeof(msg.payload.inflight), | |
2632 | }; | |
2633 | ||
2634 | if (!virtio_has_feature(dev->protocol_features, | |
2635 | VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)) { | |
2636 | return 0; | |
2637 | } | |
2638 | ||
025faa87 RK |
2639 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2640 | if (ret < 0) { | |
2641 | return ret; | |
5ad204bf XY |
2642 | } |
2643 | ||
025faa87 RK |
2644 | ret = vhost_user_read(dev, &msg); |
2645 | if (ret < 0) { | |
2646 | return ret; | |
5ad204bf XY |
2647 | } |
2648 | ||
2649 | if (msg.hdr.request != VHOST_USER_GET_INFLIGHT_FD) { | |
2650 | error_report("Received unexpected msg type. " | |
2651 | "Expected %d received %d", | |
2652 | VHOST_USER_GET_INFLIGHT_FD, msg.hdr.request); | |
025faa87 | 2653 | return -EPROTO; |
5ad204bf XY |
2654 | } |
2655 | ||
2656 | if (msg.hdr.size != sizeof(msg.payload.inflight)) { | |
2657 | error_report("Received bad msg size."); | |
025faa87 | 2658 | return -EPROTO; |
5ad204bf XY |
2659 | } |
2660 | ||
2661 | if (!msg.payload.inflight.mmap_size) { | |
2662 | return 0; | |
2663 | } | |
2664 | ||
2665 | fd = qemu_chr_fe_get_msgfd(chr); | |
2666 | if (fd < 0) { | |
2667 | error_report("Failed to get mem fd"); | |
025faa87 | 2668 | return -EIO; |
5ad204bf XY |
2669 | } |
2670 | ||
2671 | addr = mmap(0, msg.payload.inflight.mmap_size, PROT_READ | PROT_WRITE, | |
2672 | MAP_SHARED, fd, msg.payload.inflight.mmap_offset); | |
2673 | ||
2674 | if (addr == MAP_FAILED) { | |
2675 | error_report("Failed to mmap mem fd"); | |
2676 | close(fd); | |
025faa87 | 2677 | return -EFAULT; |
5ad204bf XY |
2678 | } |
2679 | ||
2680 | inflight->addr = addr; | |
2681 | inflight->fd = fd; | |
2682 | inflight->size = msg.payload.inflight.mmap_size; | |
2683 | inflight->offset = msg.payload.inflight.mmap_offset; | |
2684 | inflight->queue_size = queue_size; | |
2685 | ||
2686 | return 0; | |
2687 | } | |
2688 | ||
2689 | static int vhost_user_set_inflight_fd(struct vhost_dev *dev, | |
2690 | struct vhost_inflight *inflight) | |
2691 | { | |
2692 | VhostUserMsg msg = { | |
2693 | .hdr.request = VHOST_USER_SET_INFLIGHT_FD, | |
2694 | .hdr.flags = VHOST_USER_VERSION, | |
2695 | .payload.inflight.mmap_size = inflight->size, | |
2696 | .payload.inflight.mmap_offset = inflight->offset, | |
2697 | .payload.inflight.num_queues = dev->nvqs, | |
2698 | .payload.inflight.queue_size = inflight->queue_size, | |
2699 | .hdr.size = sizeof(msg.payload.inflight), | |
2700 | }; | |
2701 | ||
2702 | if (!virtio_has_feature(dev->protocol_features, | |
2703 | VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)) { | |
2704 | return 0; | |
2705 | } | |
2706 | ||
025faa87 | 2707 | return vhost_user_write(dev, &msg, &inflight->fd, 1); |
5ad204bf XY |
2708 | } |
2709 | ||
503e3554 AB |
2710 | static void vhost_user_state_destroy(gpointer data) |
2711 | { | |
2712 | VhostUserHostNotifier *n = (VhostUserHostNotifier *) data; | |
2713 | if (n) { | |
2714 | vhost_user_host_notifier_remove(n, NULL); | |
2715 | object_unparent(OBJECT(&n->mr)); | |
2716 | /* | |
2717 | * We can't free until vhost_user_host_notifier_remove has | |
2718 | * done it's thing so schedule the free with RCU. | |
2719 | */ | |
2720 | g_free_rcu(n, rcu); | |
2721 | } | |
2722 | } | |
2723 | ||
0b99f224 | 2724 | bool vhost_user_init(VhostUserState *user, CharBackend *chr, Error **errp) |
4d0cf552 | 2725 | { |
0b99f224 MAL |
2726 | if (user->chr) { |
2727 | error_setg(errp, "Cannot initialize vhost-user state"); | |
2728 | return false; | |
2729 | } | |
2730 | user->chr = chr; | |
6b0eff1a | 2731 | user->memory_slots = 0; |
503e3554 AB |
2732 | user->notifiers = g_ptr_array_new_full(VIRTIO_QUEUE_MAX / 4, |
2733 | &vhost_user_state_destroy); | |
0b99f224 | 2734 | return true; |
4d0cf552 TB |
2735 | } |
2736 | ||
2737 | void vhost_user_cleanup(VhostUserState *user) | |
2738 | { | |
0b99f224 MAL |
2739 | if (!user->chr) { |
2740 | return; | |
2741 | } | |
c6effa9c | 2742 | memory_region_transaction_begin(); |
503e3554 | 2743 | user->notifiers = (GPtrArray *) g_ptr_array_free(user->notifiers, true); |
c6effa9c | 2744 | memory_region_transaction_commit(); |
0b99f224 | 2745 | user->chr = NULL; |
4d0cf552 TB |
2746 | } |
2747 | ||
71e076a0 AB |
2748 | |
2749 | typedef struct { | |
2750 | vu_async_close_fn cb; | |
2751 | DeviceState *dev; | |
2752 | CharBackend *cd; | |
2753 | struct vhost_dev *vhost; | |
2754 | } VhostAsyncCallback; | |
2755 | ||
2756 | static void vhost_user_async_close_bh(void *opaque) | |
2757 | { | |
2758 | VhostAsyncCallback *data = opaque; | |
2759 | struct vhost_dev *vhost = data->vhost; | |
2760 | ||
2761 | /* | |
2762 | * If the vhost_dev has been cleared in the meantime there is | |
2763 | * nothing left to do as some other path has completed the | |
2764 | * cleanup. | |
2765 | */ | |
2766 | if (vhost->vdev) { | |
2767 | data->cb(data->dev); | |
2768 | } | |
2769 | ||
2770 | g_free(data); | |
2771 | } | |
2772 | ||
2773 | /* | |
2774 | * We only schedule the work if the machine is running. If suspended | |
2775 | * we want to keep all the in-flight data as is for migration | |
2776 | * purposes. | |
2777 | */ | |
2778 | void vhost_user_async_close(DeviceState *d, | |
2779 | CharBackend *chardev, struct vhost_dev *vhost, | |
2780 | vu_async_close_fn cb) | |
2781 | { | |
2782 | if (!runstate_check(RUN_STATE_SHUTDOWN)) { | |
2783 | /* | |
2784 | * A close event may happen during a read/write, but vhost | |
2785 | * code assumes the vhost_dev remains setup, so delay the | |
2786 | * stop & clear. | |
2787 | */ | |
2788 | AioContext *ctx = qemu_get_current_aio_context(); | |
2789 | VhostAsyncCallback *data = g_new0(VhostAsyncCallback, 1); | |
2790 | ||
2791 | /* Save data for the callback */ | |
2792 | data->cb = cb; | |
2793 | data->dev = d; | |
2794 | data->cd = chardev; | |
2795 | data->vhost = vhost; | |
2796 | ||
2797 | /* Disable any further notifications on the chardev */ | |
2798 | qemu_chr_fe_set_handlers(chardev, | |
2799 | NULL, NULL, NULL, NULL, NULL, NULL, | |
2800 | false); | |
2801 | ||
2802 | aio_bh_schedule_oneshot(ctx, vhost_user_async_close_bh, data); | |
2803 | ||
2804 | /* | |
2805 | * Move vhost device to the stopped state. The vhost-user device | |
2806 | * will be clean up and disconnected in BH. This can be useful in | |
2807 | * the vhost migration code. If disconnect was caught there is an | |
2808 | * option for the general vhost code to get the dev state without | |
2809 | * knowing its type (in this case vhost-user). | |
2810 | * | |
2811 | * Note if the vhost device is fully cleared by the time we | |
2812 | * execute the bottom half we won't continue with the cleanup. | |
2813 | */ | |
2814 | vhost->started = false; | |
2815 | } | |
2816 | } | |
2817 | ||
923b8921 YW |
2818 | static int vhost_user_dev_start(struct vhost_dev *dev, bool started) |
2819 | { | |
2820 | if (!virtio_has_feature(dev->protocol_features, | |
2821 | VHOST_USER_PROTOCOL_F_STATUS)) { | |
2822 | return 0; | |
2823 | } | |
2824 | ||
2825 | /* Set device status only for last queue pair */ | |
2826 | if (dev->vq_index + dev->nvqs != dev->vq_index_end) { | |
2827 | return 0; | |
2828 | } | |
2829 | ||
2830 | if (started) { | |
2831 | return vhost_user_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE | | |
2832 | VIRTIO_CONFIG_S_DRIVER | | |
2833 | VIRTIO_CONFIG_S_DRIVER_OK); | |
2834 | } else { | |
6f8be29e SH |
2835 | return 0; |
2836 | } | |
2837 | } | |
2838 | ||
2839 | static void vhost_user_reset_status(struct vhost_dev *dev) | |
2840 | { | |
2841 | /* Set device status only for last queue pair */ | |
2842 | if (dev->vq_index + dev->nvqs != dev->vq_index_end) { | |
2843 | return; | |
2844 | } | |
2845 | ||
2846 | if (virtio_has_feature(dev->protocol_features, | |
2847 | VHOST_USER_PROTOCOL_F_STATUS)) { | |
2848 | vhost_user_set_status(dev, 0); | |
923b8921 YW |
2849 | } |
2850 | } | |
2851 | ||
5f6f6664 NN |
2852 | const VhostOps user_ops = { |
2853 | .backend_type = VHOST_BACKEND_TYPE_USER, | |
4d0cf552 TB |
2854 | .vhost_backend_init = vhost_user_backend_init, |
2855 | .vhost_backend_cleanup = vhost_user_backend_cleanup, | |
2ce68e4c | 2856 | .vhost_backend_memslots_limit = vhost_user_memslots_limit, |
552b2522 | 2857 | .vhost_backend_no_private_memslots = vhost_user_no_private_memslots, |
21e70425 MAL |
2858 | .vhost_set_log_base = vhost_user_set_log_base, |
2859 | .vhost_set_mem_table = vhost_user_set_mem_table, | |
2860 | .vhost_set_vring_addr = vhost_user_set_vring_addr, | |
2861 | .vhost_set_vring_endian = vhost_user_set_vring_endian, | |
2862 | .vhost_set_vring_num = vhost_user_set_vring_num, | |
2863 | .vhost_set_vring_base = vhost_user_set_vring_base, | |
2864 | .vhost_get_vring_base = vhost_user_get_vring_base, | |
2865 | .vhost_set_vring_kick = vhost_user_set_vring_kick, | |
2866 | .vhost_set_vring_call = vhost_user_set_vring_call, | |
60dc3c5b | 2867 | .vhost_set_vring_err = vhost_user_set_vring_err, |
21e70425 MAL |
2868 | .vhost_set_features = vhost_user_set_features, |
2869 | .vhost_get_features = vhost_user_get_features, | |
2870 | .vhost_set_owner = vhost_user_set_owner, | |
2871 | .vhost_reset_device = vhost_user_reset_device, | |
2872 | .vhost_get_vq_index = vhost_user_get_vq_index, | |
2873 | .vhost_set_vring_enable = vhost_user_set_vring_enable, | |
1be0ac21 | 2874 | .vhost_requires_shm_log = vhost_user_requires_shm_log, |
3e866365 | 2875 | .vhost_migration_done = vhost_user_migration_done, |
c5f048d8 | 2876 | .vhost_net_set_mtu = vhost_user_net_set_mtu, |
6dcdd06e MC |
2877 | .vhost_set_iotlb_callback = vhost_user_set_iotlb_callback, |
2878 | .vhost_send_device_iotlb_msg = vhost_user_send_device_iotlb_msg, | |
4c3e257b CL |
2879 | .vhost_get_config = vhost_user_get_config, |
2880 | .vhost_set_config = vhost_user_set_config, | |
efbfeb81 GA |
2881 | .vhost_crypto_create_session = vhost_user_crypto_create_session, |
2882 | .vhost_crypto_close_session = vhost_user_crypto_close_session, | |
5ad204bf XY |
2883 | .vhost_get_inflight_fd = vhost_user_get_inflight_fd, |
2884 | .vhost_set_inflight_fd = vhost_user_set_inflight_fd, | |
923b8921 | 2885 | .vhost_dev_start = vhost_user_dev_start, |
6f8be29e | 2886 | .vhost_reset_status = vhost_user_reset_status, |
fc57fd99 | 2887 | }; |