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Commit | Line | Data |
---|---|---|
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" |
5f6f6664 | 13 | #include "hw/virtio/vhost.h" |
4d0cf552 | 14 | #include "hw/virtio/vhost-user.h" |
5f6f6664 | 15 | #include "hw/virtio/vhost-backend.h" |
44866521 | 16 | #include "hw/virtio/virtio.h" |
3e866365 | 17 | #include "hw/virtio/virtio-net.h" |
4d43a603 | 18 | #include "chardev/char-fe.h" |
57dc0217 | 19 | #include "io/channel-socket.h" |
5f6f6664 NN |
20 | #include "sysemu/kvm.h" |
21 | #include "qemu/error-report.h" | |
db725815 | 22 | #include "qemu/main-loop.h" |
5f6f6664 | 23 | #include "qemu/sockets.h" |
efbfeb81 | 24 | #include "sysemu/cryptodev.h" |
9ccbfe14 DDAG |
25 | #include "migration/migration.h" |
26 | #include "migration/postcopy-ram.h" | |
6864a7b5 | 27 | #include "trace.h" |
0b0af4d6 | 28 | #include "exec/ramblock.h" |
5f6f6664 | 29 | |
5f6f6664 NN |
30 | #include <sys/ioctl.h> |
31 | #include <sys/socket.h> | |
32 | #include <sys/un.h> | |
18658a3c PB |
33 | |
34 | #include "standard-headers/linux/vhost_types.h" | |
35 | ||
36 | #ifdef CONFIG_LINUX | |
375318d0 | 37 | #include <linux/userfaultfd.h> |
18658a3c | 38 | #endif |
5f6f6664 | 39 | |
27598393 | 40 | #define VHOST_MEMORY_BASELINE_NREGIONS 8 |
dcb10c00 | 41 | #define VHOST_USER_F_PROTOCOL_FEATURES 30 |
5f57fbea | 42 | #define VHOST_USER_SLAVE_MAX_FDS 8 |
e2051e9e | 43 | |
27598393 RN |
44 | /* |
45 | * Set maximum number of RAM slots supported to | |
46 | * the maximum number supported by the target | |
47 | * hardware plaform. | |
48 | */ | |
49 | #if defined(TARGET_X86) || defined(TARGET_X86_64) || \ | |
50 | defined(TARGET_ARM) || defined(TARGET_ARM_64) | |
51 | #include "hw/acpi/acpi.h" | |
52 | #define VHOST_USER_MAX_RAM_SLOTS ACPI_MAX_RAM_SLOTS | |
53 | ||
97252353 | 54 | #elif defined(TARGET_PPC) || defined(TARGET_PPC64) |
27598393 RN |
55 | #include "hw/ppc/spapr.h" |
56 | #define VHOST_USER_MAX_RAM_SLOTS SPAPR_MAX_RAM_SLOTS | |
57 | ||
58 | #else | |
59 | #define VHOST_USER_MAX_RAM_SLOTS 512 | |
60 | #endif | |
61 | ||
4c3e257b CL |
62 | /* |
63 | * Maximum size of virtio device config space | |
64 | */ | |
65 | #define VHOST_USER_MAX_CONFIG_SIZE 256 | |
66 | ||
de1372d4 TC |
67 | enum VhostUserProtocolFeature { |
68 | VHOST_USER_PROTOCOL_F_MQ = 0, | |
69 | VHOST_USER_PROTOCOL_F_LOG_SHMFD = 1, | |
70 | VHOST_USER_PROTOCOL_F_RARP = 2, | |
ca525ce5 | 71 | VHOST_USER_PROTOCOL_F_REPLY_ACK = 3, |
c5f048d8 | 72 | VHOST_USER_PROTOCOL_F_NET_MTU = 4, |
4bbeeba0 | 73 | VHOST_USER_PROTOCOL_F_SLAVE_REQ = 5, |
5df04f17 | 74 | VHOST_USER_PROTOCOL_F_CROSS_ENDIAN = 6, |
efbfeb81 | 75 | VHOST_USER_PROTOCOL_F_CRYPTO_SESSION = 7, |
9ccbfe14 | 76 | VHOST_USER_PROTOCOL_F_PAGEFAULT = 8, |
1c3e5a26 | 77 | VHOST_USER_PROTOCOL_F_CONFIG = 9, |
5f57fbea | 78 | VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD = 10, |
44866521 | 79 | VHOST_USER_PROTOCOL_F_HOST_NOTIFIER = 11, |
5ad204bf | 80 | VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD = 12, |
d91d57e6 | 81 | VHOST_USER_PROTOCOL_F_RESET_DEVICE = 13, |
6b0eff1a RN |
82 | /* Feature 14 reserved for VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS. */ |
83 | VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS = 15, | |
de1372d4 TC |
84 | VHOST_USER_PROTOCOL_F_MAX |
85 | }; | |
86 | ||
87 | #define VHOST_USER_PROTOCOL_FEATURE_MASK ((1 << VHOST_USER_PROTOCOL_F_MAX) - 1) | |
5f6f6664 NN |
88 | |
89 | typedef enum VhostUserRequest { | |
90 | VHOST_USER_NONE = 0, | |
91 | VHOST_USER_GET_FEATURES = 1, | |
92 | VHOST_USER_SET_FEATURES = 2, | |
93 | VHOST_USER_SET_OWNER = 3, | |
60915dc4 | 94 | VHOST_USER_RESET_OWNER = 4, |
5f6f6664 NN |
95 | VHOST_USER_SET_MEM_TABLE = 5, |
96 | VHOST_USER_SET_LOG_BASE = 6, | |
97 | VHOST_USER_SET_LOG_FD = 7, | |
98 | VHOST_USER_SET_VRING_NUM = 8, | |
99 | VHOST_USER_SET_VRING_ADDR = 9, | |
100 | VHOST_USER_SET_VRING_BASE = 10, | |
101 | VHOST_USER_GET_VRING_BASE = 11, | |
102 | VHOST_USER_SET_VRING_KICK = 12, | |
103 | VHOST_USER_SET_VRING_CALL = 13, | |
104 | VHOST_USER_SET_VRING_ERR = 14, | |
dcb10c00 MT |
105 | VHOST_USER_GET_PROTOCOL_FEATURES = 15, |
106 | VHOST_USER_SET_PROTOCOL_FEATURES = 16, | |
e2051e9e | 107 | VHOST_USER_GET_QUEUE_NUM = 17, |
7263a0ad | 108 | VHOST_USER_SET_VRING_ENABLE = 18, |
3e866365 | 109 | VHOST_USER_SEND_RARP = 19, |
c5f048d8 | 110 | VHOST_USER_NET_SET_MTU = 20, |
4bbeeba0 | 111 | VHOST_USER_SET_SLAVE_REQ_FD = 21, |
6dcdd06e | 112 | VHOST_USER_IOTLB_MSG = 22, |
5df04f17 | 113 | VHOST_USER_SET_VRING_ENDIAN = 23, |
4c3e257b CL |
114 | VHOST_USER_GET_CONFIG = 24, |
115 | VHOST_USER_SET_CONFIG = 25, | |
efbfeb81 GA |
116 | VHOST_USER_CREATE_CRYPTO_SESSION = 26, |
117 | VHOST_USER_CLOSE_CRYPTO_SESSION = 27, | |
d3dff7a5 | 118 | VHOST_USER_POSTCOPY_ADVISE = 28, |
6864a7b5 | 119 | VHOST_USER_POSTCOPY_LISTEN = 29, |
c639187e | 120 | VHOST_USER_POSTCOPY_END = 30, |
5ad204bf XY |
121 | VHOST_USER_GET_INFLIGHT_FD = 31, |
122 | VHOST_USER_SET_INFLIGHT_FD = 32, | |
bd2e44fe | 123 | VHOST_USER_GPU_SET_SOCKET = 33, |
d91d57e6 | 124 | VHOST_USER_RESET_DEVICE = 34, |
6b0eff1a RN |
125 | /* Message number 35 reserved for VHOST_USER_VRING_KICK. */ |
126 | VHOST_USER_GET_MAX_MEM_SLOTS = 36, | |
f1aeb14b RN |
127 | VHOST_USER_ADD_MEM_REG = 37, |
128 | VHOST_USER_REM_MEM_REG = 38, | |
5f6f6664 NN |
129 | VHOST_USER_MAX |
130 | } VhostUserRequest; | |
131 | ||
4bbeeba0 MAL |
132 | typedef enum VhostUserSlaveRequest { |
133 | VHOST_USER_SLAVE_NONE = 0, | |
6dcdd06e | 134 | VHOST_USER_SLAVE_IOTLB_MSG = 1, |
4c3e257b | 135 | VHOST_USER_SLAVE_CONFIG_CHANGE_MSG = 2, |
44866521 | 136 | VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG = 3, |
4bbeeba0 MAL |
137 | VHOST_USER_SLAVE_MAX |
138 | } VhostUserSlaveRequest; | |
139 | ||
5f6f6664 NN |
140 | typedef struct VhostUserMemoryRegion { |
141 | uint64_t guest_phys_addr; | |
142 | uint64_t memory_size; | |
143 | uint64_t userspace_addr; | |
3fd74b84 | 144 | uint64_t mmap_offset; |
5f6f6664 NN |
145 | } VhostUserMemoryRegion; |
146 | ||
147 | typedef struct VhostUserMemory { | |
148 | uint32_t nregions; | |
149 | uint32_t padding; | |
27598393 | 150 | VhostUserMemoryRegion regions[VHOST_MEMORY_BASELINE_NREGIONS]; |
5f6f6664 NN |
151 | } VhostUserMemory; |
152 | ||
f1aeb14b | 153 | typedef struct VhostUserMemRegMsg { |
3009edff | 154 | uint64_t padding; |
f1aeb14b RN |
155 | VhostUserMemoryRegion region; |
156 | } VhostUserMemRegMsg; | |
157 | ||
2b8819c6 VK |
158 | typedef struct VhostUserLog { |
159 | uint64_t mmap_size; | |
160 | uint64_t mmap_offset; | |
161 | } VhostUserLog; | |
162 | ||
4c3e257b CL |
163 | typedef struct VhostUserConfig { |
164 | uint32_t offset; | |
165 | uint32_t size; | |
166 | uint32_t flags; | |
167 | uint8_t region[VHOST_USER_MAX_CONFIG_SIZE]; | |
168 | } VhostUserConfig; | |
169 | ||
efbfeb81 GA |
170 | #define VHOST_CRYPTO_SYM_HMAC_MAX_KEY_LEN 512 |
171 | #define VHOST_CRYPTO_SYM_CIPHER_MAX_KEY_LEN 64 | |
172 | ||
173 | typedef struct VhostUserCryptoSession { | |
174 | /* session id for success, -1 on errors */ | |
175 | int64_t session_id; | |
176 | CryptoDevBackendSymSessionInfo session_setup_data; | |
177 | uint8_t key[VHOST_CRYPTO_SYM_CIPHER_MAX_KEY_LEN]; | |
178 | uint8_t auth_key[VHOST_CRYPTO_SYM_HMAC_MAX_KEY_LEN]; | |
179 | } VhostUserCryptoSession; | |
180 | ||
4c3e257b CL |
181 | static VhostUserConfig c __attribute__ ((unused)); |
182 | #define VHOST_USER_CONFIG_HDR_SIZE (sizeof(c.offset) \ | |
183 | + sizeof(c.size) \ | |
184 | + sizeof(c.flags)) | |
185 | ||
44866521 TB |
186 | typedef struct VhostUserVringArea { |
187 | uint64_t u64; | |
188 | uint64_t size; | |
189 | uint64_t offset; | |
190 | } VhostUserVringArea; | |
191 | ||
5ad204bf XY |
192 | typedef struct VhostUserInflight { |
193 | uint64_t mmap_size; | |
194 | uint64_t mmap_offset; | |
195 | uint16_t num_queues; | |
196 | uint16_t queue_size; | |
197 | } VhostUserInflight; | |
198 | ||
24e34754 | 199 | typedef struct { |
5f6f6664 NN |
200 | VhostUserRequest request; |
201 | ||
202 | #define VHOST_USER_VERSION_MASK (0x3) | |
203 | #define VHOST_USER_REPLY_MASK (0x1<<2) | |
ca525ce5 | 204 | #define VHOST_USER_NEED_REPLY_MASK (0x1 << 3) |
5f6f6664 NN |
205 | uint32_t flags; |
206 | uint32_t size; /* the following payload size */ | |
24e34754 MT |
207 | } QEMU_PACKED VhostUserHeader; |
208 | ||
209 | typedef union { | |
5f6f6664 NN |
210 | #define VHOST_USER_VRING_IDX_MASK (0xff) |
211 | #define VHOST_USER_VRING_NOFD_MASK (0x1<<8) | |
212 | uint64_t u64; | |
213 | struct vhost_vring_state state; | |
214 | struct vhost_vring_addr addr; | |
215 | VhostUserMemory memory; | |
f1aeb14b | 216 | VhostUserMemRegMsg mem_reg; |
2b8819c6 | 217 | VhostUserLog log; |
6dcdd06e | 218 | struct vhost_iotlb_msg iotlb; |
4c3e257b | 219 | VhostUserConfig config; |
efbfeb81 | 220 | VhostUserCryptoSession session; |
44866521 | 221 | VhostUserVringArea area; |
5ad204bf | 222 | VhostUserInflight inflight; |
24e34754 MT |
223 | } VhostUserPayload; |
224 | ||
225 | typedef struct VhostUserMsg { | |
226 | VhostUserHeader hdr; | |
227 | VhostUserPayload payload; | |
5f6f6664 NN |
228 | } QEMU_PACKED VhostUserMsg; |
229 | ||
230 | static VhostUserMsg m __attribute__ ((unused)); | |
24e34754 | 231 | #define VHOST_USER_HDR_SIZE (sizeof(VhostUserHeader)) |
5f6f6664 | 232 | |
24e34754 | 233 | #define VHOST_USER_PAYLOAD_SIZE (sizeof(VhostUserPayload)) |
5f6f6664 NN |
234 | |
235 | /* The version of the protocol we support */ | |
236 | #define VHOST_USER_VERSION (0x1) | |
237 | ||
2152f3fe | 238 | struct vhost_user { |
9ccbfe14 | 239 | struct vhost_dev *dev; |
4d0cf552 TB |
240 | /* Shared between vhost devs of the same virtio device */ |
241 | VhostUserState *user; | |
57dc0217 GK |
242 | QIOChannel *slave_ioc; |
243 | GSource *slave_src; | |
9ccbfe14 | 244 | NotifierWithReturn postcopy_notifier; |
f82c1116 | 245 | struct PostCopyFD postcopy_fd; |
27598393 | 246 | uint64_t postcopy_client_bases[VHOST_USER_MAX_RAM_SLOTS]; |
905125d0 DDAG |
247 | /* Length of the region_rb and region_rb_offset arrays */ |
248 | size_t region_rb_len; | |
249 | /* RAMBlock associated with a given region */ | |
250 | RAMBlock **region_rb; | |
251 | /* The offset from the start of the RAMBlock to the start of the | |
252 | * vhost region. | |
253 | */ | |
254 | ram_addr_t *region_rb_offset; | |
255 | ||
6864a7b5 DDAG |
256 | /* True once we've entered postcopy_listen */ |
257 | bool postcopy_listen; | |
f1aeb14b RN |
258 | |
259 | /* Our current regions */ | |
260 | int num_shadow_regions; | |
27598393 | 261 | struct vhost_memory_region shadow_regions[VHOST_USER_MAX_RAM_SLOTS]; |
f1aeb14b RN |
262 | }; |
263 | ||
264 | struct scrub_regions { | |
265 | struct vhost_memory_region *region; | |
266 | int reg_idx; | |
267 | int fd_idx; | |
2152f3fe MAL |
268 | }; |
269 | ||
5f6f6664 NN |
270 | static bool ioeventfd_enabled(void) |
271 | { | |
b0aa77d3 | 272 | return !kvm_enabled() || kvm_eventfds_enabled(); |
5f6f6664 NN |
273 | } |
274 | ||
9af84c02 | 275 | static int vhost_user_read_header(struct vhost_dev *dev, VhostUserMsg *msg) |
5f6f6664 | 276 | { |
2152f3fe | 277 | struct vhost_user *u = dev->opaque; |
4d0cf552 | 278 | CharBackend *chr = u->user->chr; |
5f6f6664 NN |
279 | uint8_t *p = (uint8_t *) msg; |
280 | int r, size = VHOST_USER_HDR_SIZE; | |
281 | ||
282 | r = qemu_chr_fe_read_all(chr, p, size); | |
283 | if (r != size) { | |
025faa87 | 284 | int saved_errno = errno; |
5421f318 | 285 | error_report("Failed to read msg header. Read %d instead of %d." |
24e34754 | 286 | " Original request %d.", r, size, msg->hdr.request); |
025faa87 | 287 | return r < 0 ? -saved_errno : -EIO; |
5f6f6664 NN |
288 | } |
289 | ||
290 | /* validate received flags */ | |
24e34754 | 291 | if (msg->hdr.flags != (VHOST_USER_REPLY_MASK | VHOST_USER_VERSION)) { |
5f6f6664 | 292 | error_report("Failed to read msg header." |
24e34754 | 293 | " Flags 0x%x instead of 0x%x.", msg->hdr.flags, |
5f6f6664 | 294 | VHOST_USER_REPLY_MASK | VHOST_USER_VERSION); |
025faa87 | 295 | return -EPROTO; |
9af84c02 MAL |
296 | } |
297 | ||
643a9435 AB |
298 | trace_vhost_user_read(msg->hdr.request, msg->hdr.flags); |
299 | ||
9af84c02 MAL |
300 | return 0; |
301 | } | |
302 | ||
a7f523c7 GK |
303 | struct vhost_user_read_cb_data { |
304 | struct vhost_dev *dev; | |
305 | VhostUserMsg *msg; | |
306 | GMainLoop *loop; | |
307 | int ret; | |
308 | }; | |
309 | ||
bf7b1eab | 310 | static gboolean vhost_user_read_cb(void *do_not_use, GIOCondition condition, |
a7f523c7 | 311 | gpointer opaque) |
9af84c02 | 312 | { |
a7f523c7 GK |
313 | struct vhost_user_read_cb_data *data = opaque; |
314 | struct vhost_dev *dev = data->dev; | |
315 | VhostUserMsg *msg = data->msg; | |
9af84c02 MAL |
316 | struct vhost_user *u = dev->opaque; |
317 | CharBackend *chr = u->user->chr; | |
318 | uint8_t *p = (uint8_t *) msg; | |
319 | int r, size; | |
320 | ||
025faa87 RK |
321 | r = vhost_user_read_header(dev, msg); |
322 | if (r < 0) { | |
323 | data->ret = r; | |
a7f523c7 | 324 | goto end; |
5f6f6664 NN |
325 | } |
326 | ||
327 | /* validate message size is sane */ | |
24e34754 | 328 | if (msg->hdr.size > VHOST_USER_PAYLOAD_SIZE) { |
5f6f6664 | 329 | error_report("Failed to read msg header." |
24e34754 | 330 | " Size %d exceeds the maximum %zu.", msg->hdr.size, |
5f6f6664 | 331 | VHOST_USER_PAYLOAD_SIZE); |
025faa87 | 332 | data->ret = -EPROTO; |
a7f523c7 | 333 | goto end; |
5f6f6664 NN |
334 | } |
335 | ||
24e34754 | 336 | if (msg->hdr.size) { |
5f6f6664 | 337 | p += VHOST_USER_HDR_SIZE; |
24e34754 | 338 | size = msg->hdr.size; |
5f6f6664 NN |
339 | r = qemu_chr_fe_read_all(chr, p, size); |
340 | if (r != size) { | |
025faa87 | 341 | int saved_errno = errno; |
5f6f6664 | 342 | error_report("Failed to read msg payload." |
24e34754 | 343 | " Read %d instead of %d.", r, msg->hdr.size); |
025faa87 | 344 | data->ret = r < 0 ? -saved_errno : -EIO; |
a7f523c7 | 345 | goto end; |
5f6f6664 NN |
346 | } |
347 | } | |
348 | ||
a7f523c7 GK |
349 | end: |
350 | g_main_loop_quit(data->loop); | |
351 | return G_SOURCE_REMOVE; | |
352 | } | |
353 | ||
db8a3772 GK |
354 | static gboolean slave_read(QIOChannel *ioc, GIOCondition condition, |
355 | gpointer opaque); | |
356 | ||
357 | /* | |
358 | * This updates the read handler to use a new event loop context. | |
359 | * Event sources are removed from the previous context : this ensures | |
360 | * that events detected in the previous context are purged. They will | |
361 | * be re-detected and processed in the new context. | |
362 | */ | |
363 | static void slave_update_read_handler(struct vhost_dev *dev, | |
364 | GMainContext *ctxt) | |
365 | { | |
366 | struct vhost_user *u = dev->opaque; | |
367 | ||
368 | if (!u->slave_ioc) { | |
369 | return; | |
370 | } | |
371 | ||
372 | if (u->slave_src) { | |
373 | g_source_destroy(u->slave_src); | |
374 | g_source_unref(u->slave_src); | |
375 | } | |
376 | ||
377 | u->slave_src = qio_channel_add_watch_source(u->slave_ioc, | |
378 | G_IO_IN | G_IO_HUP, | |
379 | slave_read, dev, NULL, | |
380 | ctxt); | |
381 | } | |
382 | ||
a7f523c7 GK |
383 | static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg) |
384 | { | |
385 | struct vhost_user *u = dev->opaque; | |
386 | CharBackend *chr = u->user->chr; | |
387 | GMainContext *prev_ctxt = chr->chr->gcontext; | |
388 | GMainContext *ctxt = g_main_context_new(); | |
389 | GMainLoop *loop = g_main_loop_new(ctxt, FALSE); | |
390 | struct vhost_user_read_cb_data data = { | |
391 | .dev = dev, | |
392 | .loop = loop, | |
393 | .msg = msg, | |
394 | .ret = 0 | |
395 | }; | |
396 | ||
397 | /* | |
398 | * We want to be able to monitor the slave channel fd while waiting | |
399 | * for chr I/O. This requires an event loop, but we can't nest the | |
400 | * one to which chr is currently attached : its fd handlers might not | |
401 | * be prepared for re-entrancy. So we create a new one and switch chr | |
402 | * to use it. | |
403 | */ | |
db8a3772 | 404 | slave_update_read_handler(dev, ctxt); |
a7f523c7 GK |
405 | qemu_chr_be_update_read_handlers(chr->chr, ctxt); |
406 | qemu_chr_fe_add_watch(chr, G_IO_IN | G_IO_HUP, vhost_user_read_cb, &data); | |
407 | ||
408 | g_main_loop_run(loop); | |
409 | ||
410 | /* | |
411 | * Restore the previous event loop context. This also destroys/recreates | |
412 | * event sources : this guarantees that all pending events in the original | |
413 | * context that have been processed by the nested loop are purged. | |
414 | */ | |
415 | qemu_chr_be_update_read_handlers(chr->chr, prev_ctxt); | |
db8a3772 | 416 | slave_update_read_handler(dev, NULL); |
a7f523c7 GK |
417 | |
418 | g_main_loop_unref(loop); | |
419 | g_main_context_unref(ctxt); | |
420 | ||
421 | return data.ret; | |
5f6f6664 NN |
422 | } |
423 | ||
ca525ce5 | 424 | static int process_message_reply(struct vhost_dev *dev, |
3cf7daf8 | 425 | const VhostUserMsg *msg) |
ca525ce5 | 426 | { |
025faa87 | 427 | int ret; |
60cd1102 | 428 | VhostUserMsg msg_reply; |
ca525ce5 | 429 | |
24e34754 | 430 | if ((msg->hdr.flags & VHOST_USER_NEED_REPLY_MASK) == 0) { |
60cd1102 ZY |
431 | return 0; |
432 | } | |
433 | ||
025faa87 RK |
434 | ret = vhost_user_read(dev, &msg_reply); |
435 | if (ret < 0) { | |
436 | return ret; | |
ca525ce5 PS |
437 | } |
438 | ||
24e34754 | 439 | if (msg_reply.hdr.request != msg->hdr.request) { |
edb40732 | 440 | error_report("Received unexpected msg type. " |
ca525ce5 | 441 | "Expected %d received %d", |
24e34754 | 442 | msg->hdr.request, msg_reply.hdr.request); |
025faa87 | 443 | return -EPROTO; |
ca525ce5 PS |
444 | } |
445 | ||
025faa87 | 446 | return msg_reply.payload.u64 ? -EIO : 0; |
ca525ce5 PS |
447 | } |
448 | ||
21e70425 MAL |
449 | static bool vhost_user_one_time_request(VhostUserRequest request) |
450 | { | |
451 | switch (request) { | |
452 | case VHOST_USER_SET_OWNER: | |
60915dc4 | 453 | case VHOST_USER_RESET_OWNER: |
21e70425 MAL |
454 | case VHOST_USER_SET_MEM_TABLE: |
455 | case VHOST_USER_GET_QUEUE_NUM: | |
c5f048d8 | 456 | case VHOST_USER_NET_SET_MTU: |
21e70425 MAL |
457 | return true; |
458 | default: | |
459 | return false; | |
460 | } | |
461 | } | |
462 | ||
463 | /* most non-init callers ignore the error */ | |
5f6f6664 NN |
464 | static int vhost_user_write(struct vhost_dev *dev, VhostUserMsg *msg, |
465 | int *fds, int fd_num) | |
466 | { | |
2152f3fe | 467 | struct vhost_user *u = dev->opaque; |
4d0cf552 | 468 | CharBackend *chr = u->user->chr; |
24e34754 | 469 | int ret, size = VHOST_USER_HDR_SIZE + msg->hdr.size; |
5f6f6664 | 470 | |
21e70425 MAL |
471 | /* |
472 | * For non-vring specific requests, like VHOST_USER_SET_MEM_TABLE, | |
473 | * we just need send it once in the first time. For later such | |
474 | * request, we just ignore it. | |
475 | */ | |
24e34754 MT |
476 | if (vhost_user_one_time_request(msg->hdr.request) && dev->vq_index != 0) { |
477 | msg->hdr.flags &= ~VHOST_USER_NEED_REPLY_MASK; | |
21e70425 MAL |
478 | return 0; |
479 | } | |
480 | ||
6fab2f3f | 481 | if (qemu_chr_fe_set_msgfds(chr, fds, fd_num) < 0) { |
f6b85710 | 482 | error_report("Failed to set msg fds."); |
025faa87 | 483 | return -EINVAL; |
6fab2f3f | 484 | } |
5f6f6664 | 485 | |
f6b85710 MAL |
486 | ret = qemu_chr_fe_write_all(chr, (const uint8_t *) msg, size); |
487 | if (ret != size) { | |
025faa87 | 488 | int saved_errno = errno; |
f6b85710 MAL |
489 | error_report("Failed to write msg." |
490 | " Wrote %d instead of %d.", ret, size); | |
025faa87 | 491 | return ret < 0 ? -saved_errno : -EIO; |
f6b85710 MAL |
492 | } |
493 | ||
6ca6d8ee AB |
494 | trace_vhost_user_write(msg->hdr.request, msg->hdr.flags); |
495 | ||
f6b85710 | 496 | return 0; |
5f6f6664 NN |
497 | } |
498 | ||
bd2e44fe MAL |
499 | int vhost_user_gpu_set_socket(struct vhost_dev *dev, int fd) |
500 | { | |
501 | VhostUserMsg msg = { | |
502 | .hdr.request = VHOST_USER_GPU_SET_SOCKET, | |
503 | .hdr.flags = VHOST_USER_VERSION, | |
504 | }; | |
505 | ||
506 | return vhost_user_write(dev, &msg, &fd, 1); | |
507 | } | |
508 | ||
21e70425 MAL |
509 | static int vhost_user_set_log_base(struct vhost_dev *dev, uint64_t base, |
510 | struct vhost_log *log) | |
b931bfbf | 511 | { |
27598393 | 512 | int fds[VHOST_USER_MAX_RAM_SLOTS]; |
21e70425 MAL |
513 | size_t fd_num = 0; |
514 | bool shmfd = virtio_has_feature(dev->protocol_features, | |
515 | VHOST_USER_PROTOCOL_F_LOG_SHMFD); | |
025faa87 | 516 | int ret; |
21e70425 | 517 | VhostUserMsg msg = { |
24e34754 MT |
518 | .hdr.request = VHOST_USER_SET_LOG_BASE, |
519 | .hdr.flags = VHOST_USER_VERSION, | |
48854f57 | 520 | .payload.log.mmap_size = log->size * sizeof(*(log->log)), |
2b8819c6 | 521 | .payload.log.mmap_offset = 0, |
24e34754 | 522 | .hdr.size = sizeof(msg.payload.log), |
21e70425 MAL |
523 | }; |
524 | ||
525 | if (shmfd && log->fd != -1) { | |
526 | fds[fd_num++] = log->fd; | |
527 | } | |
528 | ||
025faa87 RK |
529 | ret = vhost_user_write(dev, &msg, fds, fd_num); |
530 | if (ret < 0) { | |
531 | return ret; | |
c4843a45 | 532 | } |
21e70425 MAL |
533 | |
534 | if (shmfd) { | |
24e34754 | 535 | msg.hdr.size = 0; |
025faa87 RK |
536 | ret = vhost_user_read(dev, &msg); |
537 | if (ret < 0) { | |
538 | return ret; | |
21e70425 MAL |
539 | } |
540 | ||
24e34754 | 541 | if (msg.hdr.request != VHOST_USER_SET_LOG_BASE) { |
21e70425 MAL |
542 | error_report("Received unexpected msg type. " |
543 | "Expected %d received %d", | |
24e34754 | 544 | VHOST_USER_SET_LOG_BASE, msg.hdr.request); |
025faa87 | 545 | return -EPROTO; |
21e70425 | 546 | } |
b931bfbf | 547 | } |
21e70425 MAL |
548 | |
549 | return 0; | |
b931bfbf CO |
550 | } |
551 | ||
23374a84 RN |
552 | static MemoryRegion *vhost_user_get_mr_data(uint64_t addr, ram_addr_t *offset, |
553 | int *fd) | |
554 | { | |
555 | MemoryRegion *mr; | |
556 | ||
557 | assert((uintptr_t)addr == addr); | |
558 | mr = memory_region_from_host((void *)(uintptr_t)addr, offset); | |
559 | *fd = memory_region_get_fd(mr); | |
560 | ||
561 | return mr; | |
562 | } | |
563 | ||
ece99091 | 564 | static void vhost_user_fill_msg_region(VhostUserMemoryRegion *dst, |
8d193715 RN |
565 | struct vhost_memory_region *src, |
566 | uint64_t mmap_offset) | |
ece99091 RN |
567 | { |
568 | assert(src != NULL && dst != NULL); | |
569 | dst->userspace_addr = src->userspace_addr; | |
570 | dst->memory_size = src->memory_size; | |
571 | dst->guest_phys_addr = src->guest_phys_addr; | |
8d193715 | 572 | dst->mmap_offset = mmap_offset; |
ece99091 RN |
573 | } |
574 | ||
2d9da9df RN |
575 | static int vhost_user_fill_set_mem_table_msg(struct vhost_user *u, |
576 | struct vhost_dev *dev, | |
577 | VhostUserMsg *msg, | |
578 | int *fds, size_t *fd_num, | |
579 | bool track_ramblocks) | |
580 | { | |
581 | int i, fd; | |
582 | ram_addr_t offset; | |
583 | MemoryRegion *mr; | |
584 | struct vhost_memory_region *reg; | |
ece99091 | 585 | VhostUserMemoryRegion region_buffer; |
2d9da9df RN |
586 | |
587 | msg->hdr.request = VHOST_USER_SET_MEM_TABLE; | |
588 | ||
589 | for (i = 0; i < dev->mem->nregions; ++i) { | |
590 | reg = dev->mem->regions + i; | |
591 | ||
23374a84 | 592 | mr = vhost_user_get_mr_data(reg->userspace_addr, &offset, &fd); |
2d9da9df RN |
593 | if (fd > 0) { |
594 | if (track_ramblocks) { | |
27598393 | 595 | assert(*fd_num < VHOST_MEMORY_BASELINE_NREGIONS); |
2d9da9df RN |
596 | trace_vhost_user_set_mem_table_withfd(*fd_num, mr->name, |
597 | reg->memory_size, | |
598 | reg->guest_phys_addr, | |
599 | reg->userspace_addr, | |
600 | offset); | |
601 | u->region_rb_offset[i] = offset; | |
602 | u->region_rb[i] = mr->ram_block; | |
27598393 | 603 | } else if (*fd_num == VHOST_MEMORY_BASELINE_NREGIONS) { |
2d9da9df | 604 | error_report("Failed preparing vhost-user memory table msg"); |
025faa87 | 605 | return -ENOBUFS; |
2d9da9df | 606 | } |
8d193715 | 607 | vhost_user_fill_msg_region(®ion_buffer, reg, offset); |
ece99091 | 608 | msg->payload.memory.regions[*fd_num] = region_buffer; |
2d9da9df RN |
609 | fds[(*fd_num)++] = fd; |
610 | } else if (track_ramblocks) { | |
611 | u->region_rb_offset[i] = 0; | |
612 | u->region_rb[i] = NULL; | |
613 | } | |
614 | } | |
615 | ||
616 | msg->payload.memory.nregions = *fd_num; | |
617 | ||
618 | if (!*fd_num) { | |
619 | error_report("Failed initializing vhost-user memory map, " | |
620 | "consider using -object memory-backend-file share=on"); | |
025faa87 | 621 | return -EINVAL; |
2d9da9df RN |
622 | } |
623 | ||
624 | msg->hdr.size = sizeof(msg->payload.memory.nregions); | |
625 | msg->hdr.size += sizeof(msg->payload.memory.padding); | |
626 | msg->hdr.size += *fd_num * sizeof(VhostUserMemoryRegion); | |
627 | ||
025faa87 | 628 | return 0; |
2d9da9df RN |
629 | } |
630 | ||
f1aeb14b RN |
631 | static inline bool reg_equal(struct vhost_memory_region *shadow_reg, |
632 | struct vhost_memory_region *vdev_reg) | |
633 | { | |
634 | return shadow_reg->guest_phys_addr == vdev_reg->guest_phys_addr && | |
635 | shadow_reg->userspace_addr == vdev_reg->userspace_addr && | |
636 | shadow_reg->memory_size == vdev_reg->memory_size; | |
637 | } | |
638 | ||
639 | static void scrub_shadow_regions(struct vhost_dev *dev, | |
640 | struct scrub_regions *add_reg, | |
641 | int *nr_add_reg, | |
642 | struct scrub_regions *rem_reg, | |
643 | int *nr_rem_reg, uint64_t *shadow_pcb, | |
644 | bool track_ramblocks) | |
645 | { | |
646 | struct vhost_user *u = dev->opaque; | |
27598393 | 647 | bool found[VHOST_USER_MAX_RAM_SLOTS] = {}; |
f1aeb14b RN |
648 | struct vhost_memory_region *reg, *shadow_reg; |
649 | int i, j, fd, add_idx = 0, rm_idx = 0, fd_num = 0; | |
650 | ram_addr_t offset; | |
651 | MemoryRegion *mr; | |
652 | bool matching; | |
653 | ||
654 | /* | |
655 | * Find memory regions present in our shadow state which are not in | |
656 | * the device's current memory state. | |
657 | * | |
658 | * Mark regions in both the shadow and device state as "found". | |
659 | */ | |
660 | for (i = 0; i < u->num_shadow_regions; i++) { | |
661 | shadow_reg = &u->shadow_regions[i]; | |
662 | matching = false; | |
663 | ||
664 | for (j = 0; j < dev->mem->nregions; j++) { | |
665 | reg = &dev->mem->regions[j]; | |
666 | ||
667 | mr = vhost_user_get_mr_data(reg->userspace_addr, &offset, &fd); | |
668 | ||
669 | if (reg_equal(shadow_reg, reg)) { | |
670 | matching = true; | |
671 | found[j] = true; | |
672 | if (track_ramblocks) { | |
673 | /* | |
674 | * Reset postcopy client bases, region_rb, and | |
675 | * region_rb_offset in case regions are removed. | |
676 | */ | |
677 | if (fd > 0) { | |
678 | u->region_rb_offset[j] = offset; | |
679 | u->region_rb[j] = mr->ram_block; | |
680 | shadow_pcb[j] = u->postcopy_client_bases[i]; | |
681 | } else { | |
682 | u->region_rb_offset[j] = 0; | |
683 | u->region_rb[j] = NULL; | |
684 | } | |
685 | } | |
686 | break; | |
687 | } | |
688 | } | |
689 | ||
690 | /* | |
691 | * If the region was not found in the current device memory state | |
692 | * create an entry for it in the removed list. | |
693 | */ | |
694 | if (!matching) { | |
695 | rem_reg[rm_idx].region = shadow_reg; | |
696 | rem_reg[rm_idx++].reg_idx = i; | |
697 | } | |
698 | } | |
699 | ||
700 | /* | |
701 | * For regions not marked "found", create entries in the added list. | |
702 | * | |
703 | * Note their indexes in the device memory state and the indexes of their | |
704 | * file descriptors. | |
705 | */ | |
706 | for (i = 0; i < dev->mem->nregions; i++) { | |
707 | reg = &dev->mem->regions[i]; | |
8b616bee | 708 | vhost_user_get_mr_data(reg->userspace_addr, &offset, &fd); |
f1aeb14b RN |
709 | if (fd > 0) { |
710 | ++fd_num; | |
711 | } | |
712 | ||
713 | /* | |
714 | * If the region was in both the shadow and device state we don't | |
715 | * need to send a VHOST_USER_ADD_MEM_REG message for it. | |
716 | */ | |
717 | if (found[i]) { | |
718 | continue; | |
719 | } | |
720 | ||
721 | add_reg[add_idx].region = reg; | |
722 | add_reg[add_idx].reg_idx = i; | |
723 | add_reg[add_idx++].fd_idx = fd_num; | |
724 | } | |
725 | *nr_rem_reg = rm_idx; | |
726 | *nr_add_reg = add_idx; | |
727 | ||
728 | return; | |
729 | } | |
730 | ||
731 | static int send_remove_regions(struct vhost_dev *dev, | |
732 | struct scrub_regions *remove_reg, | |
733 | int nr_rem_reg, VhostUserMsg *msg, | |
734 | bool reply_supported) | |
735 | { | |
736 | struct vhost_user *u = dev->opaque; | |
737 | struct vhost_memory_region *shadow_reg; | |
738 | int i, fd, shadow_reg_idx, ret; | |
739 | ram_addr_t offset; | |
740 | VhostUserMemoryRegion region_buffer; | |
741 | ||
742 | /* | |
743 | * The regions in remove_reg appear in the same order they do in the | |
744 | * shadow table. Therefore we can minimize memory copies by iterating | |
745 | * through remove_reg backwards. | |
746 | */ | |
747 | for (i = nr_rem_reg - 1; i >= 0; i--) { | |
748 | shadow_reg = remove_reg[i].region; | |
749 | shadow_reg_idx = remove_reg[i].reg_idx; | |
750 | ||
751 | vhost_user_get_mr_data(shadow_reg->userspace_addr, &offset, &fd); | |
752 | ||
753 | if (fd > 0) { | |
754 | msg->hdr.request = VHOST_USER_REM_MEM_REG; | |
8d193715 | 755 | vhost_user_fill_msg_region(®ion_buffer, shadow_reg, 0); |
f1aeb14b RN |
756 | msg->payload.mem_reg.region = region_buffer; |
757 | ||
a81d8d4a | 758 | ret = vhost_user_write(dev, msg, NULL, 0); |
025faa87 RK |
759 | if (ret < 0) { |
760 | return ret; | |
f1aeb14b RN |
761 | } |
762 | ||
763 | if (reply_supported) { | |
764 | ret = process_message_reply(dev, msg); | |
765 | if (ret) { | |
766 | return ret; | |
767 | } | |
768 | } | |
769 | } | |
770 | ||
771 | /* | |
772 | * At this point we know the backend has unmapped the region. It is now | |
773 | * safe to remove it from the shadow table. | |
774 | */ | |
775 | memmove(&u->shadow_regions[shadow_reg_idx], | |
776 | &u->shadow_regions[shadow_reg_idx + 1], | |
777 | sizeof(struct vhost_memory_region) * | |
4fdecf05 | 778 | (u->num_shadow_regions - shadow_reg_idx - 1)); |
f1aeb14b RN |
779 | u->num_shadow_regions--; |
780 | } | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
785 | static int send_add_regions(struct vhost_dev *dev, | |
786 | struct scrub_regions *add_reg, int nr_add_reg, | |
787 | VhostUserMsg *msg, uint64_t *shadow_pcb, | |
788 | bool reply_supported, bool track_ramblocks) | |
789 | { | |
790 | struct vhost_user *u = dev->opaque; | |
791 | int i, fd, ret, reg_idx, reg_fd_idx; | |
792 | struct vhost_memory_region *reg; | |
793 | MemoryRegion *mr; | |
794 | ram_addr_t offset; | |
795 | VhostUserMsg msg_reply; | |
796 | VhostUserMemoryRegion region_buffer; | |
797 | ||
798 | for (i = 0; i < nr_add_reg; i++) { | |
799 | reg = add_reg[i].region; | |
800 | reg_idx = add_reg[i].reg_idx; | |
801 | reg_fd_idx = add_reg[i].fd_idx; | |
802 | ||
803 | mr = vhost_user_get_mr_data(reg->userspace_addr, &offset, &fd); | |
804 | ||
805 | if (fd > 0) { | |
806 | if (track_ramblocks) { | |
807 | trace_vhost_user_set_mem_table_withfd(reg_fd_idx, mr->name, | |
808 | reg->memory_size, | |
809 | reg->guest_phys_addr, | |
810 | reg->userspace_addr, | |
811 | offset); | |
812 | u->region_rb_offset[reg_idx] = offset; | |
813 | u->region_rb[reg_idx] = mr->ram_block; | |
814 | } | |
815 | msg->hdr.request = VHOST_USER_ADD_MEM_REG; | |
8d193715 | 816 | vhost_user_fill_msg_region(®ion_buffer, reg, offset); |
f1aeb14b | 817 | msg->payload.mem_reg.region = region_buffer; |
f1aeb14b | 818 | |
025faa87 RK |
819 | ret = vhost_user_write(dev, msg, &fd, 1); |
820 | if (ret < 0) { | |
821 | return ret; | |
f1aeb14b RN |
822 | } |
823 | ||
824 | if (track_ramblocks) { | |
825 | uint64_t reply_gpa; | |
826 | ||
025faa87 RK |
827 | ret = vhost_user_read(dev, &msg_reply); |
828 | if (ret < 0) { | |
829 | return ret; | |
f1aeb14b RN |
830 | } |
831 | ||
832 | reply_gpa = msg_reply.payload.mem_reg.region.guest_phys_addr; | |
833 | ||
834 | if (msg_reply.hdr.request != VHOST_USER_ADD_MEM_REG) { | |
835 | error_report("%s: Received unexpected msg type." | |
836 | "Expected %d received %d", __func__, | |
837 | VHOST_USER_ADD_MEM_REG, | |
838 | msg_reply.hdr.request); | |
025faa87 | 839 | return -EPROTO; |
f1aeb14b RN |
840 | } |
841 | ||
842 | /* | |
843 | * We're using the same structure, just reusing one of the | |
844 | * fields, so it should be the same size. | |
845 | */ | |
846 | if (msg_reply.hdr.size != msg->hdr.size) { | |
847 | error_report("%s: Unexpected size for postcopy reply " | |
848 | "%d vs %d", __func__, msg_reply.hdr.size, | |
849 | msg->hdr.size); | |
025faa87 | 850 | return -EPROTO; |
f1aeb14b RN |
851 | } |
852 | ||
853 | /* Get the postcopy client base from the backend's reply. */ | |
854 | if (reply_gpa == dev->mem->regions[reg_idx].guest_phys_addr) { | |
855 | shadow_pcb[reg_idx] = | |
856 | msg_reply.payload.mem_reg.region.userspace_addr; | |
857 | trace_vhost_user_set_mem_table_postcopy( | |
858 | msg_reply.payload.mem_reg.region.userspace_addr, | |
859 | msg->payload.mem_reg.region.userspace_addr, | |
860 | reg_fd_idx, reg_idx); | |
861 | } else { | |
862 | error_report("%s: invalid postcopy reply for region. " | |
863 | "Got guest physical address %" PRIX64 ", expected " | |
864 | "%" PRIX64, __func__, reply_gpa, | |
865 | dev->mem->regions[reg_idx].guest_phys_addr); | |
025faa87 | 866 | return -EPROTO; |
f1aeb14b RN |
867 | } |
868 | } else if (reply_supported) { | |
869 | ret = process_message_reply(dev, msg); | |
870 | if (ret) { | |
871 | return ret; | |
872 | } | |
873 | } | |
874 | } else if (track_ramblocks) { | |
875 | u->region_rb_offset[reg_idx] = 0; | |
876 | u->region_rb[reg_idx] = NULL; | |
877 | } | |
878 | ||
879 | /* | |
880 | * At this point, we know the backend has mapped in the new | |
881 | * region, if the region has a valid file descriptor. | |
882 | * | |
883 | * The region should now be added to the shadow table. | |
884 | */ | |
885 | u->shadow_regions[u->num_shadow_regions].guest_phys_addr = | |
886 | reg->guest_phys_addr; | |
887 | u->shadow_regions[u->num_shadow_regions].userspace_addr = | |
888 | reg->userspace_addr; | |
889 | u->shadow_regions[u->num_shadow_regions].memory_size = | |
890 | reg->memory_size; | |
891 | u->num_shadow_regions++; | |
892 | } | |
893 | ||
894 | return 0; | |
895 | } | |
896 | ||
897 | static int vhost_user_add_remove_regions(struct vhost_dev *dev, | |
898 | VhostUserMsg *msg, | |
899 | bool reply_supported, | |
900 | bool track_ramblocks) | |
901 | { | |
902 | struct vhost_user *u = dev->opaque; | |
27598393 RN |
903 | struct scrub_regions add_reg[VHOST_USER_MAX_RAM_SLOTS]; |
904 | struct scrub_regions rem_reg[VHOST_USER_MAX_RAM_SLOTS]; | |
905 | uint64_t shadow_pcb[VHOST_USER_MAX_RAM_SLOTS] = {}; | |
f1aeb14b | 906 | int nr_add_reg, nr_rem_reg; |
025faa87 | 907 | int ret; |
f1aeb14b | 908 | |
3009edff | 909 | msg->hdr.size = sizeof(msg->payload.mem_reg); |
f1aeb14b RN |
910 | |
911 | /* Find the regions which need to be removed or added. */ | |
912 | scrub_shadow_regions(dev, add_reg, &nr_add_reg, rem_reg, &nr_rem_reg, | |
913 | shadow_pcb, track_ramblocks); | |
914 | ||
025faa87 RK |
915 | if (nr_rem_reg) { |
916 | ret = send_remove_regions(dev, rem_reg, nr_rem_reg, msg, | |
917 | reply_supported); | |
918 | if (ret < 0) { | |
919 | goto err; | |
920 | } | |
f1aeb14b RN |
921 | } |
922 | ||
025faa87 RK |
923 | if (nr_add_reg) { |
924 | ret = send_add_regions(dev, add_reg, nr_add_reg, msg, shadow_pcb, | |
925 | reply_supported, track_ramblocks); | |
926 | if (ret < 0) { | |
927 | goto err; | |
928 | } | |
f1aeb14b RN |
929 | } |
930 | ||
931 | if (track_ramblocks) { | |
932 | memcpy(u->postcopy_client_bases, shadow_pcb, | |
27598393 | 933 | sizeof(uint64_t) * VHOST_USER_MAX_RAM_SLOTS); |
f1aeb14b RN |
934 | /* |
935 | * Now we've registered this with the postcopy code, we ack to the | |
936 | * client, because now we're in the position to be able to deal with | |
937 | * any faults it generates. | |
938 | */ | |
939 | /* TODO: Use this for failure cases as well with a bad value. */ | |
940 | msg->hdr.size = sizeof(msg->payload.u64); | |
941 | msg->payload.u64 = 0; /* OK */ | |
942 | ||
025faa87 RK |
943 | ret = vhost_user_write(dev, msg, NULL, 0); |
944 | if (ret < 0) { | |
945 | return ret; | |
f1aeb14b RN |
946 | } |
947 | } | |
948 | ||
949 | return 0; | |
950 | ||
951 | err: | |
952 | if (track_ramblocks) { | |
953 | memcpy(u->postcopy_client_bases, shadow_pcb, | |
27598393 | 954 | sizeof(uint64_t) * VHOST_USER_MAX_RAM_SLOTS); |
f1aeb14b RN |
955 | } |
956 | ||
025faa87 | 957 | return ret; |
f1aeb14b RN |
958 | } |
959 | ||
55d754b3 | 960 | static int vhost_user_set_mem_table_postcopy(struct vhost_dev *dev, |
f1aeb14b RN |
961 | struct vhost_memory *mem, |
962 | bool reply_supported, | |
963 | bool config_mem_slots) | |
55d754b3 | 964 | { |
9bb38019 | 965 | struct vhost_user *u = dev->opaque; |
27598393 | 966 | int fds[VHOST_MEMORY_BASELINE_NREGIONS]; |
55d754b3 | 967 | size_t fd_num = 0; |
9bb38019 DDAG |
968 | VhostUserMsg msg_reply; |
969 | int region_i, msg_i; | |
025faa87 | 970 | int ret; |
9bb38019 | 971 | |
55d754b3 | 972 | VhostUserMsg msg = { |
55d754b3 DDAG |
973 | .hdr.flags = VHOST_USER_VERSION, |
974 | }; | |
975 | ||
905125d0 DDAG |
976 | if (u->region_rb_len < dev->mem->nregions) { |
977 | u->region_rb = g_renew(RAMBlock*, u->region_rb, dev->mem->nregions); | |
978 | u->region_rb_offset = g_renew(ram_addr_t, u->region_rb_offset, | |
979 | dev->mem->nregions); | |
980 | memset(&(u->region_rb[u->region_rb_len]), '\0', | |
981 | sizeof(RAMBlock *) * (dev->mem->nregions - u->region_rb_len)); | |
982 | memset(&(u->region_rb_offset[u->region_rb_len]), '\0', | |
983 | sizeof(ram_addr_t) * (dev->mem->nregions - u->region_rb_len)); | |
984 | u->region_rb_len = dev->mem->nregions; | |
985 | } | |
986 | ||
f1aeb14b | 987 | if (config_mem_slots) { |
025faa87 RK |
988 | ret = vhost_user_add_remove_regions(dev, &msg, reply_supported, true); |
989 | if (ret < 0) { | |
990 | return ret; | |
f1aeb14b RN |
991 | } |
992 | } else { | |
025faa87 RK |
993 | ret = vhost_user_fill_set_mem_table_msg(u, dev, &msg, fds, &fd_num, |
994 | true); | |
995 | if (ret < 0) { | |
996 | return ret; | |
f1aeb14b | 997 | } |
55d754b3 | 998 | |
025faa87 RK |
999 | ret = vhost_user_write(dev, &msg, fds, fd_num); |
1000 | if (ret < 0) { | |
1001 | return ret; | |
f1aeb14b | 1002 | } |
55d754b3 | 1003 | |
025faa87 RK |
1004 | ret = vhost_user_read(dev, &msg_reply); |
1005 | if (ret < 0) { | |
1006 | return ret; | |
f1aeb14b | 1007 | } |
9bb38019 | 1008 | |
f1aeb14b RN |
1009 | if (msg_reply.hdr.request != VHOST_USER_SET_MEM_TABLE) { |
1010 | error_report("%s: Received unexpected msg type." | |
1011 | "Expected %d received %d", __func__, | |
1012 | VHOST_USER_SET_MEM_TABLE, msg_reply.hdr.request); | |
025faa87 | 1013 | return -EPROTO; |
f1aeb14b | 1014 | } |
9bb38019 | 1015 | |
f1aeb14b RN |
1016 | /* |
1017 | * We're using the same structure, just reusing one of the | |
1018 | * fields, so it should be the same size. | |
1019 | */ | |
1020 | if (msg_reply.hdr.size != msg.hdr.size) { | |
1021 | error_report("%s: Unexpected size for postcopy reply " | |
1022 | "%d vs %d", __func__, msg_reply.hdr.size, | |
1023 | msg.hdr.size); | |
025faa87 | 1024 | return -EPROTO; |
f1aeb14b RN |
1025 | } |
1026 | ||
1027 | memset(u->postcopy_client_bases, 0, | |
27598393 | 1028 | sizeof(uint64_t) * VHOST_USER_MAX_RAM_SLOTS); |
f1aeb14b RN |
1029 | |
1030 | /* | |
1031 | * They're in the same order as the regions that were sent | |
1032 | * but some of the regions were skipped (above) if they | |
1033 | * didn't have fd's | |
1034 | */ | |
1035 | for (msg_i = 0, region_i = 0; | |
1036 | region_i < dev->mem->nregions; | |
1037 | region_i++) { | |
1038 | if (msg_i < fd_num && | |
1039 | msg_reply.payload.memory.regions[msg_i].guest_phys_addr == | |
1040 | dev->mem->regions[region_i].guest_phys_addr) { | |
1041 | u->postcopy_client_bases[region_i] = | |
1042 | msg_reply.payload.memory.regions[msg_i].userspace_addr; | |
1043 | trace_vhost_user_set_mem_table_postcopy( | |
1044 | msg_reply.payload.memory.regions[msg_i].userspace_addr, | |
1045 | msg.payload.memory.regions[msg_i].userspace_addr, | |
1046 | msg_i, region_i); | |
1047 | msg_i++; | |
1048 | } | |
1049 | } | |
1050 | if (msg_i != fd_num) { | |
1051 | error_report("%s: postcopy reply not fully consumed " | |
1052 | "%d vs %zd", | |
1053 | __func__, msg_i, fd_num); | |
025faa87 | 1054 | return -EIO; |
f1aeb14b RN |
1055 | } |
1056 | ||
1057 | /* | |
1058 | * Now we've registered this with the postcopy code, we ack to the | |
1059 | * client, because now we're in the position to be able to deal | |
1060 | * with any faults it generates. | |
1061 | */ | |
1062 | /* TODO: Use this for failure cases as well with a bad value. */ | |
1063 | msg.hdr.size = sizeof(msg.payload.u64); | |
1064 | msg.payload.u64 = 0; /* OK */ | |
025faa87 RK |
1065 | ret = vhost_user_write(dev, &msg, NULL, 0); |
1066 | if (ret < 0) { | |
1067 | return ret; | |
9bb38019 | 1068 | } |
9bb38019 DDAG |
1069 | } |
1070 | ||
55d754b3 DDAG |
1071 | return 0; |
1072 | } | |
1073 | ||
94c9cb31 MT |
1074 | static int vhost_user_set_mem_table(struct vhost_dev *dev, |
1075 | struct vhost_memory *mem) | |
1076 | { | |
55d754b3 | 1077 | struct vhost_user *u = dev->opaque; |
27598393 | 1078 | int fds[VHOST_MEMORY_BASELINE_NREGIONS]; |
94c9cb31 | 1079 | size_t fd_num = 0; |
55d754b3 | 1080 | bool do_postcopy = u->postcopy_listen && u->postcopy_fd.handler; |
94c9cb31 | 1081 | bool reply_supported = virtio_has_feature(dev->protocol_features, |
5ce43896 | 1082 | VHOST_USER_PROTOCOL_F_REPLY_ACK); |
f1aeb14b RN |
1083 | bool config_mem_slots = |
1084 | virtio_has_feature(dev->protocol_features, | |
1085 | VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS); | |
025faa87 | 1086 | int ret; |
94c9cb31 | 1087 | |
55d754b3 | 1088 | if (do_postcopy) { |
f1aeb14b RN |
1089 | /* |
1090 | * Postcopy has enough differences that it's best done in it's own | |
55d754b3 DDAG |
1091 | * version |
1092 | */ | |
f1aeb14b RN |
1093 | return vhost_user_set_mem_table_postcopy(dev, mem, reply_supported, |
1094 | config_mem_slots); | |
55d754b3 DDAG |
1095 | } |
1096 | ||
94c9cb31 | 1097 | VhostUserMsg msg = { |
24e34754 | 1098 | .hdr.flags = VHOST_USER_VERSION, |
94c9cb31 MT |
1099 | }; |
1100 | ||
1101 | if (reply_supported) { | |
24e34754 | 1102 | msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; |
94c9cb31 MT |
1103 | } |
1104 | ||
f1aeb14b | 1105 | if (config_mem_slots) { |
025faa87 RK |
1106 | ret = vhost_user_add_remove_regions(dev, &msg, reply_supported, false); |
1107 | if (ret < 0) { | |
1108 | return ret; | |
f1aeb14b RN |
1109 | } |
1110 | } else { | |
025faa87 RK |
1111 | ret = vhost_user_fill_set_mem_table_msg(u, dev, &msg, fds, &fd_num, |
1112 | false); | |
1113 | if (ret < 0) { | |
1114 | return ret; | |
f1aeb14b | 1115 | } |
025faa87 RK |
1116 | |
1117 | ret = vhost_user_write(dev, &msg, fds, fd_num); | |
1118 | if (ret < 0) { | |
1119 | return ret; | |
f1aeb14b | 1120 | } |
94c9cb31 | 1121 | |
f1aeb14b RN |
1122 | if (reply_supported) { |
1123 | return process_message_reply(dev, &msg); | |
1124 | } | |
94c9cb31 MT |
1125 | } |
1126 | ||
1127 | return 0; | |
1128 | } | |
1129 | ||
21e70425 MAL |
1130 | static int vhost_user_set_vring_endian(struct vhost_dev *dev, |
1131 | struct vhost_vring_state *ring) | |
1132 | { | |
5df04f17 FF |
1133 | bool cross_endian = virtio_has_feature(dev->protocol_features, |
1134 | VHOST_USER_PROTOCOL_F_CROSS_ENDIAN); | |
1135 | VhostUserMsg msg = { | |
24e34754 MT |
1136 | .hdr.request = VHOST_USER_SET_VRING_ENDIAN, |
1137 | .hdr.flags = VHOST_USER_VERSION, | |
5df04f17 | 1138 | .payload.state = *ring, |
24e34754 | 1139 | .hdr.size = sizeof(msg.payload.state), |
5df04f17 FF |
1140 | }; |
1141 | ||
1142 | if (!cross_endian) { | |
1143 | error_report("vhost-user trying to send unhandled ioctl"); | |
025faa87 | 1144 | return -ENOTSUP; |
5df04f17 FF |
1145 | } |
1146 | ||
025faa87 | 1147 | return vhost_user_write(dev, &msg, NULL, 0); |
21e70425 | 1148 | } |
5f6f6664 | 1149 | |
21e70425 MAL |
1150 | static int vhost_set_vring(struct vhost_dev *dev, |
1151 | unsigned long int request, | |
1152 | struct vhost_vring_state *ring) | |
1153 | { | |
1154 | VhostUserMsg msg = { | |
24e34754 MT |
1155 | .hdr.request = request, |
1156 | .hdr.flags = VHOST_USER_VERSION, | |
7f4a930e | 1157 | .payload.state = *ring, |
24e34754 | 1158 | .hdr.size = sizeof(msg.payload.state), |
21e70425 MAL |
1159 | }; |
1160 | ||
025faa87 | 1161 | return vhost_user_write(dev, &msg, NULL, 0); |
21e70425 MAL |
1162 | } |
1163 | ||
1164 | static int vhost_user_set_vring_num(struct vhost_dev *dev, | |
1165 | struct vhost_vring_state *ring) | |
1166 | { | |
1167 | return vhost_set_vring(dev, VHOST_USER_SET_VRING_NUM, ring); | |
1168 | } | |
1169 | ||
0b0af4d6 | 1170 | static void vhost_user_host_notifier_free(VhostUserHostNotifier *n) |
44866521 | 1171 | { |
0b0af4d6 | 1172 | assert(n && n->unmap_addr); |
8e3b0cbb | 1173 | munmap(n->unmap_addr, qemu_real_host_page_size()); |
0b0af4d6 XL |
1174 | n->unmap_addr = NULL; |
1175 | } | |
1176 | ||
503e3554 AB |
1177 | /* |
1178 | * clean-up function for notifier, will finally free the structure | |
1179 | * under rcu. | |
1180 | */ | |
1181 | static void vhost_user_host_notifier_remove(VhostUserHostNotifier *n, | |
1182 | VirtIODevice *vdev) | |
0b0af4d6 | 1183 | { |
e867144b | 1184 | if (n->addr) { |
0b0af4d6 | 1185 | if (vdev) { |
503e3554 | 1186 | virtio_queue_set_host_notifier_mr(vdev, n->idx, &n->mr, false); |
0b0af4d6 XL |
1187 | } |
1188 | assert(!n->unmap_addr); | |
1189 | n->unmap_addr = n->addr; | |
1190 | n->addr = NULL; | |
1191 | call_rcu(n, vhost_user_host_notifier_free, rcu); | |
44866521 TB |
1192 | } |
1193 | } | |
1194 | ||
21e70425 MAL |
1195 | static int vhost_user_set_vring_base(struct vhost_dev *dev, |
1196 | struct vhost_vring_state *ring) | |
1197 | { | |
1198 | return vhost_set_vring(dev, VHOST_USER_SET_VRING_BASE, ring); | |
1199 | } | |
1200 | ||
1201 | static int vhost_user_set_vring_enable(struct vhost_dev *dev, int enable) | |
1202 | { | |
dc3db6ad | 1203 | int i; |
21e70425 | 1204 | |
923e2d98 | 1205 | if (!virtio_has_feature(dev->features, VHOST_USER_F_PROTOCOL_FEATURES)) { |
025faa87 | 1206 | return -EINVAL; |
5f6f6664 NN |
1207 | } |
1208 | ||
dc3db6ad | 1209 | for (i = 0; i < dev->nvqs; ++i) { |
025faa87 | 1210 | int ret; |
dc3db6ad MT |
1211 | struct vhost_vring_state state = { |
1212 | .index = dev->vq_index + i, | |
1213 | .num = enable, | |
1214 | }; | |
1215 | ||
025faa87 RK |
1216 | ret = vhost_set_vring(dev, VHOST_USER_SET_VRING_ENABLE, &state); |
1217 | if (ret < 0) { | |
1218 | /* | |
1219 | * Restoring the previous state is likely infeasible, as well as | |
1220 | * proceeding regardless the error, so just bail out and hope for | |
1221 | * the device-level recovery. | |
1222 | */ | |
1223 | return ret; | |
1224 | } | |
dc3db6ad | 1225 | } |
21e70425 | 1226 | |
dc3db6ad MT |
1227 | return 0; |
1228 | } | |
21e70425 | 1229 | |
503e3554 AB |
1230 | static VhostUserHostNotifier *fetch_notifier(VhostUserState *u, |
1231 | int idx) | |
1232 | { | |
1233 | if (idx >= u->notifiers->len) { | |
1234 | return NULL; | |
1235 | } | |
1236 | return g_ptr_array_index(u->notifiers, idx); | |
1237 | } | |
1238 | ||
21e70425 MAL |
1239 | static int vhost_user_get_vring_base(struct vhost_dev *dev, |
1240 | struct vhost_vring_state *ring) | |
1241 | { | |
025faa87 | 1242 | int ret; |
21e70425 | 1243 | VhostUserMsg msg = { |
24e34754 MT |
1244 | .hdr.request = VHOST_USER_GET_VRING_BASE, |
1245 | .hdr.flags = VHOST_USER_VERSION, | |
7f4a930e | 1246 | .payload.state = *ring, |
24e34754 | 1247 | .hdr.size = sizeof(msg.payload.state), |
21e70425 | 1248 | }; |
0b0af4d6 | 1249 | struct vhost_user *u = dev->opaque; |
21e70425 | 1250 | |
503e3554 AB |
1251 | VhostUserHostNotifier *n = fetch_notifier(u->user, ring->index); |
1252 | if (n) { | |
1253 | vhost_user_host_notifier_remove(n, dev->vdev); | |
1254 | } | |
44866521 | 1255 | |
025faa87 RK |
1256 | ret = vhost_user_write(dev, &msg, NULL, 0); |
1257 | if (ret < 0) { | |
1258 | return ret; | |
c4843a45 | 1259 | } |
21e70425 | 1260 | |
025faa87 RK |
1261 | ret = vhost_user_read(dev, &msg); |
1262 | if (ret < 0) { | |
1263 | return ret; | |
5f6f6664 NN |
1264 | } |
1265 | ||
24e34754 | 1266 | if (msg.hdr.request != VHOST_USER_GET_VRING_BASE) { |
21e70425 | 1267 | error_report("Received unexpected msg type. Expected %d received %d", |
24e34754 | 1268 | VHOST_USER_GET_VRING_BASE, msg.hdr.request); |
025faa87 | 1269 | return -EPROTO; |
21e70425 | 1270 | } |
5f6f6664 | 1271 | |
24e34754 | 1272 | if (msg.hdr.size != sizeof(msg.payload.state)) { |
21e70425 | 1273 | error_report("Received bad msg size."); |
025faa87 | 1274 | return -EPROTO; |
5f6f6664 NN |
1275 | } |
1276 | ||
7f4a930e | 1277 | *ring = msg.payload.state; |
21e70425 | 1278 | |
5f6f6664 NN |
1279 | return 0; |
1280 | } | |
1281 | ||
21e70425 MAL |
1282 | static int vhost_set_vring_file(struct vhost_dev *dev, |
1283 | VhostUserRequest request, | |
1284 | struct vhost_vring_file *file) | |
c2bea314 | 1285 | { |
27598393 | 1286 | int fds[VHOST_USER_MAX_RAM_SLOTS]; |
9a78a5dd | 1287 | size_t fd_num = 0; |
c2bea314 | 1288 | VhostUserMsg msg = { |
24e34754 MT |
1289 | .hdr.request = request, |
1290 | .hdr.flags = VHOST_USER_VERSION, | |
7f4a930e | 1291 | .payload.u64 = file->index & VHOST_USER_VRING_IDX_MASK, |
24e34754 | 1292 | .hdr.size = sizeof(msg.payload.u64), |
c2bea314 MAL |
1293 | }; |
1294 | ||
21e70425 MAL |
1295 | if (ioeventfd_enabled() && file->fd > 0) { |
1296 | fds[fd_num++] = file->fd; | |
1297 | } else { | |
7f4a930e | 1298 | msg.payload.u64 |= VHOST_USER_VRING_NOFD_MASK; |
9a78a5dd MAL |
1299 | } |
1300 | ||
025faa87 | 1301 | return vhost_user_write(dev, &msg, fds, fd_num); |
21e70425 | 1302 | } |
9a78a5dd | 1303 | |
21e70425 MAL |
1304 | static int vhost_user_set_vring_kick(struct vhost_dev *dev, |
1305 | struct vhost_vring_file *file) | |
1306 | { | |
1307 | return vhost_set_vring_file(dev, VHOST_USER_SET_VRING_KICK, file); | |
1308 | } | |
1309 | ||
1310 | static int vhost_user_set_vring_call(struct vhost_dev *dev, | |
1311 | struct vhost_vring_file *file) | |
1312 | { | |
1313 | return vhost_set_vring_file(dev, VHOST_USER_SET_VRING_CALL, file); | |
1314 | } | |
1315 | ||
60dc3c5b KK |
1316 | static int vhost_user_set_vring_err(struct vhost_dev *dev, |
1317 | struct vhost_vring_file *file) | |
1318 | { | |
1319 | return vhost_set_vring_file(dev, VHOST_USER_SET_VRING_ERR, file); | |
1320 | } | |
21e70425 MAL |
1321 | |
1322 | static int vhost_user_get_u64(struct vhost_dev *dev, int request, uint64_t *u64) | |
1323 | { | |
025faa87 | 1324 | int ret; |
21e70425 | 1325 | VhostUserMsg msg = { |
24e34754 MT |
1326 | .hdr.request = request, |
1327 | .hdr.flags = VHOST_USER_VERSION, | |
21e70425 MAL |
1328 | }; |
1329 | ||
1330 | if (vhost_user_one_time_request(request) && dev->vq_index != 0) { | |
1331 | return 0; | |
9a78a5dd | 1332 | } |
c2bea314 | 1333 | |
025faa87 RK |
1334 | ret = vhost_user_write(dev, &msg, NULL, 0); |
1335 | if (ret < 0) { | |
1336 | return ret; | |
c4843a45 | 1337 | } |
21e70425 | 1338 | |
025faa87 RK |
1339 | ret = vhost_user_read(dev, &msg); |
1340 | if (ret < 0) { | |
1341 | return ret; | |
21e70425 MAL |
1342 | } |
1343 | ||
24e34754 | 1344 | if (msg.hdr.request != request) { |
21e70425 | 1345 | error_report("Received unexpected msg type. Expected %d received %d", |
24e34754 | 1346 | request, msg.hdr.request); |
025faa87 | 1347 | return -EPROTO; |
21e70425 MAL |
1348 | } |
1349 | ||
24e34754 | 1350 | if (msg.hdr.size != sizeof(msg.payload.u64)) { |
21e70425 | 1351 | error_report("Received bad msg size."); |
025faa87 | 1352 | return -EPROTO; |
21e70425 MAL |
1353 | } |
1354 | ||
7f4a930e | 1355 | *u64 = msg.payload.u64; |
21e70425 MAL |
1356 | |
1357 | return 0; | |
1358 | } | |
1359 | ||
1360 | static int vhost_user_get_features(struct vhost_dev *dev, uint64_t *features) | |
1361 | { | |
f2a6e6c4 KW |
1362 | if (vhost_user_get_u64(dev, VHOST_USER_GET_FEATURES, features) < 0) { |
1363 | return -EPROTO; | |
1364 | } | |
1365 | ||
1366 | return 0; | |
21e70425 MAL |
1367 | } |
1368 | ||
699f2e53 DP |
1369 | static int enforce_reply(struct vhost_dev *dev, |
1370 | const VhostUserMsg *msg) | |
1371 | { | |
1372 | uint64_t dummy; | |
1373 | ||
1374 | if (msg->hdr.flags & VHOST_USER_NEED_REPLY_MASK) { | |
1375 | return process_message_reply(dev, msg); | |
1376 | } | |
1377 | ||
1378 | /* | |
1379 | * We need to wait for a reply but the backend does not | |
1380 | * support replies for the command we just sent. | |
1381 | * Send VHOST_USER_GET_FEATURES which makes all backends | |
1382 | * send a reply. | |
1383 | */ | |
1384 | return vhost_user_get_features(dev, &dummy); | |
1385 | } | |
1386 | ||
1387 | static int vhost_user_set_vring_addr(struct vhost_dev *dev, | |
1388 | struct vhost_vring_addr *addr) | |
1389 | { | |
025faa87 | 1390 | int ret; |
699f2e53 DP |
1391 | VhostUserMsg msg = { |
1392 | .hdr.request = VHOST_USER_SET_VRING_ADDR, | |
1393 | .hdr.flags = VHOST_USER_VERSION, | |
1394 | .payload.addr = *addr, | |
1395 | .hdr.size = sizeof(msg.payload.addr), | |
1396 | }; | |
1397 | ||
1398 | bool reply_supported = virtio_has_feature(dev->protocol_features, | |
1399 | VHOST_USER_PROTOCOL_F_REPLY_ACK); | |
1400 | ||
1401 | /* | |
1402 | * wait for a reply if logging is enabled to make sure | |
1403 | * backend is actually logging changes | |
1404 | */ | |
1405 | bool wait_for_reply = addr->flags & (1 << VHOST_VRING_F_LOG); | |
1406 | ||
1407 | if (reply_supported && wait_for_reply) { | |
1408 | msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; | |
1409 | } | |
1410 | ||
025faa87 RK |
1411 | ret = vhost_user_write(dev, &msg, NULL, 0); |
1412 | if (ret < 0) { | |
1413 | return ret; | |
699f2e53 DP |
1414 | } |
1415 | ||
1416 | if (wait_for_reply) { | |
1417 | return enforce_reply(dev, &msg); | |
1418 | } | |
1419 | ||
1420 | return 0; | |
1421 | } | |
1422 | ||
1423 | static int vhost_user_set_u64(struct vhost_dev *dev, int request, uint64_t u64, | |
1424 | bool wait_for_reply) | |
1425 | { | |
1426 | VhostUserMsg msg = { | |
1427 | .hdr.request = request, | |
1428 | .hdr.flags = VHOST_USER_VERSION, | |
1429 | .payload.u64 = u64, | |
1430 | .hdr.size = sizeof(msg.payload.u64), | |
1431 | }; | |
025faa87 | 1432 | int ret; |
699f2e53 DP |
1433 | |
1434 | if (wait_for_reply) { | |
1435 | bool reply_supported = virtio_has_feature(dev->protocol_features, | |
1436 | VHOST_USER_PROTOCOL_F_REPLY_ACK); | |
1437 | if (reply_supported) { | |
1438 | msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; | |
1439 | } | |
1440 | } | |
1441 | ||
025faa87 RK |
1442 | ret = vhost_user_write(dev, &msg, NULL, 0); |
1443 | if (ret < 0) { | |
1444 | return ret; | |
699f2e53 DP |
1445 | } |
1446 | ||
1447 | if (wait_for_reply) { | |
1448 | return enforce_reply(dev, &msg); | |
1449 | } | |
1450 | ||
1451 | return 0; | |
1452 | } | |
1453 | ||
1454 | static int vhost_user_set_features(struct vhost_dev *dev, | |
1455 | uint64_t features) | |
1456 | { | |
1457 | /* | |
1458 | * wait for a reply if logging is enabled to make sure | |
1459 | * backend is actually logging changes | |
1460 | */ | |
1461 | bool log_enabled = features & (0x1ULL << VHOST_F_LOG_ALL); | |
1462 | ||
1463 | return vhost_user_set_u64(dev, VHOST_USER_SET_FEATURES, features, | |
1464 | log_enabled); | |
1465 | } | |
1466 | ||
1467 | static int vhost_user_set_protocol_features(struct vhost_dev *dev, | |
1468 | uint64_t features) | |
1469 | { | |
1470 | return vhost_user_set_u64(dev, VHOST_USER_SET_PROTOCOL_FEATURES, features, | |
1471 | false); | |
1472 | } | |
1473 | ||
21e70425 MAL |
1474 | static int vhost_user_set_owner(struct vhost_dev *dev) |
1475 | { | |
1476 | VhostUserMsg msg = { | |
24e34754 MT |
1477 | .hdr.request = VHOST_USER_SET_OWNER, |
1478 | .hdr.flags = VHOST_USER_VERSION, | |
21e70425 MAL |
1479 | }; |
1480 | ||
025faa87 | 1481 | return vhost_user_write(dev, &msg, NULL, 0); |
21e70425 MAL |
1482 | } |
1483 | ||
6b0eff1a RN |
1484 | static int vhost_user_get_max_memslots(struct vhost_dev *dev, |
1485 | uint64_t *max_memslots) | |
1486 | { | |
1487 | uint64_t backend_max_memslots; | |
1488 | int err; | |
1489 | ||
1490 | err = vhost_user_get_u64(dev, VHOST_USER_GET_MAX_MEM_SLOTS, | |
1491 | &backend_max_memslots); | |
1492 | if (err < 0) { | |
1493 | return err; | |
1494 | } | |
1495 | ||
1496 | *max_memslots = backend_max_memslots; | |
1497 | ||
1498 | return 0; | |
1499 | } | |
1500 | ||
21e70425 MAL |
1501 | static int vhost_user_reset_device(struct vhost_dev *dev) |
1502 | { | |
1503 | VhostUserMsg msg = { | |
24e34754 | 1504 | .hdr.flags = VHOST_USER_VERSION, |
21e70425 MAL |
1505 | }; |
1506 | ||
d91d57e6 RN |
1507 | msg.hdr.request = virtio_has_feature(dev->protocol_features, |
1508 | VHOST_USER_PROTOCOL_F_RESET_DEVICE) | |
1509 | ? VHOST_USER_RESET_DEVICE | |
1510 | : VHOST_USER_RESET_OWNER; | |
1511 | ||
025faa87 | 1512 | return vhost_user_write(dev, &msg, NULL, 0); |
c2bea314 MAL |
1513 | } |
1514 | ||
4c3e257b CL |
1515 | static int vhost_user_slave_handle_config_change(struct vhost_dev *dev) |
1516 | { | |
025faa87 RK |
1517 | if (!dev->config_ops || !dev->config_ops->vhost_dev_config_notifier) { |
1518 | return -ENOSYS; | |
4c3e257b CL |
1519 | } |
1520 | ||
025faa87 | 1521 | return dev->config_ops->vhost_dev_config_notifier(dev); |
4c3e257b CL |
1522 | } |
1523 | ||
503e3554 AB |
1524 | /* |
1525 | * Fetch or create the notifier for a given idx. Newly created | |
1526 | * notifiers are added to the pointer array that tracks them. | |
1527 | */ | |
1528 | static VhostUserHostNotifier *fetch_or_create_notifier(VhostUserState *u, | |
1529 | int idx) | |
1530 | { | |
1531 | VhostUserHostNotifier *n = NULL; | |
1532 | if (idx >= u->notifiers->len) { | |
b595d627 | 1533 | g_ptr_array_set_size(u->notifiers, idx + 1); |
503e3554 AB |
1534 | } |
1535 | ||
1536 | n = g_ptr_array_index(u->notifiers, idx); | |
1537 | if (!n) { | |
1538 | n = g_new0(VhostUserHostNotifier, 1); | |
1539 | n->idx = idx; | |
1540 | g_ptr_array_insert(u->notifiers, idx, n); | |
1541 | trace_vhost_user_create_notifier(idx, n); | |
1542 | } | |
1543 | ||
1544 | return n; | |
1545 | } | |
1546 | ||
44866521 TB |
1547 | static int vhost_user_slave_handle_vring_host_notifier(struct vhost_dev *dev, |
1548 | VhostUserVringArea *area, | |
1549 | int fd) | |
1550 | { | |
1551 | int queue_idx = area->u64 & VHOST_USER_VRING_IDX_MASK; | |
8e3b0cbb | 1552 | size_t page_size = qemu_real_host_page_size(); |
44866521 TB |
1553 | struct vhost_user *u = dev->opaque; |
1554 | VhostUserState *user = u->user; | |
1555 | VirtIODevice *vdev = dev->vdev; | |
1556 | VhostUserHostNotifier *n; | |
1557 | void *addr; | |
1558 | char *name; | |
1559 | ||
1560 | if (!virtio_has_feature(dev->protocol_features, | |
1561 | VHOST_USER_PROTOCOL_F_HOST_NOTIFIER) || | |
1562 | vdev == NULL || queue_idx >= virtio_get_num_queues(vdev)) { | |
025faa87 | 1563 | return -EINVAL; |
44866521 TB |
1564 | } |
1565 | ||
503e3554 AB |
1566 | /* |
1567 | * Fetch notifier and invalidate any old data before setting up | |
1568 | * new mapped address. | |
1569 | */ | |
1570 | n = fetch_or_create_notifier(user, queue_idx); | |
1571 | vhost_user_host_notifier_remove(n, vdev); | |
44866521 TB |
1572 | |
1573 | if (area->u64 & VHOST_USER_VRING_NOFD_MASK) { | |
1574 | return 0; | |
1575 | } | |
1576 | ||
1577 | /* Sanity check. */ | |
1578 | if (area->size != page_size) { | |
025faa87 | 1579 | return -EINVAL; |
44866521 TB |
1580 | } |
1581 | ||
1582 | addr = mmap(NULL, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
1583 | fd, area->offset); | |
1584 | if (addr == MAP_FAILED) { | |
025faa87 | 1585 | return -EFAULT; |
44866521 TB |
1586 | } |
1587 | ||
1588 | name = g_strdup_printf("vhost-user/host-notifier@%p mmaps[%d]", | |
1589 | user, queue_idx); | |
0b0af4d6 | 1590 | if (!n->mr.ram) { /* Don't init again after suspend. */ |
a1ed9ef1 XL |
1591 | memory_region_init_ram_device_ptr(&n->mr, OBJECT(vdev), name, |
1592 | page_size, addr); | |
0b0af4d6 XL |
1593 | } else { |
1594 | n->mr.ram_block->host = addr; | |
1595 | } | |
44866521 TB |
1596 | g_free(name); |
1597 | ||
1598 | if (virtio_queue_set_host_notifier_mr(vdev, queue_idx, &n->mr, true)) { | |
1f89d3b9 | 1599 | object_unparent(OBJECT(&n->mr)); |
44866521 | 1600 | munmap(addr, page_size); |
025faa87 | 1601 | return -ENXIO; |
44866521 TB |
1602 | } |
1603 | ||
1604 | n->addr = addr; | |
44866521 TB |
1605 | |
1606 | return 0; | |
1607 | } | |
1608 | ||
de62e494 GK |
1609 | static void close_slave_channel(struct vhost_user *u) |
1610 | { | |
57dc0217 GK |
1611 | g_source_destroy(u->slave_src); |
1612 | g_source_unref(u->slave_src); | |
1613 | u->slave_src = NULL; | |
1614 | object_unref(OBJECT(u->slave_ioc)); | |
1615 | u->slave_ioc = NULL; | |
de62e494 GK |
1616 | } |
1617 | ||
57dc0217 GK |
1618 | static gboolean slave_read(QIOChannel *ioc, GIOCondition condition, |
1619 | gpointer opaque) | |
4bbeeba0 MAL |
1620 | { |
1621 | struct vhost_dev *dev = opaque; | |
1622 | struct vhost_user *u = dev->opaque; | |
69aff030 MT |
1623 | VhostUserHeader hdr = { 0, }; |
1624 | VhostUserPayload payload = { 0, }; | |
57dc0217 GK |
1625 | Error *local_err = NULL; |
1626 | gboolean rc = G_SOURCE_CONTINUE; | |
1627 | int ret = 0; | |
1f3a4519 | 1628 | struct iovec iov; |
57dc0217 GK |
1629 | g_autofree int *fd = NULL; |
1630 | size_t fdsize = 0; | |
1631 | int i; | |
5f57fbea | 1632 | |
4bbeeba0 | 1633 | /* Read header */ |
1f3a4519 TB |
1634 | iov.iov_base = &hdr; |
1635 | iov.iov_len = VHOST_USER_HDR_SIZE; | |
1636 | ||
57dc0217 GK |
1637 | if (qio_channel_readv_full_all(ioc, &iov, 1, &fd, &fdsize, &local_err)) { |
1638 | error_report_err(local_err); | |
4bbeeba0 MAL |
1639 | goto err; |
1640 | } | |
1641 | ||
69aff030 | 1642 | if (hdr.size > VHOST_USER_PAYLOAD_SIZE) { |
4bbeeba0 | 1643 | error_report("Failed to read msg header." |
69aff030 | 1644 | " Size %d exceeds the maximum %zu.", hdr.size, |
4bbeeba0 MAL |
1645 | VHOST_USER_PAYLOAD_SIZE); |
1646 | goto err; | |
1647 | } | |
1648 | ||
1649 | /* Read payload */ | |
57dc0217 GK |
1650 | if (qio_channel_read_all(ioc, (char *) &payload, hdr.size, &local_err)) { |
1651 | error_report_err(local_err); | |
4bbeeba0 MAL |
1652 | goto err; |
1653 | } | |
1654 | ||
69aff030 | 1655 | switch (hdr.request) { |
6dcdd06e | 1656 | case VHOST_USER_SLAVE_IOTLB_MSG: |
69aff030 | 1657 | ret = vhost_backend_handle_iotlb_msg(dev, &payload.iotlb); |
6dcdd06e | 1658 | break; |
4c3e257b CL |
1659 | case VHOST_USER_SLAVE_CONFIG_CHANGE_MSG : |
1660 | ret = vhost_user_slave_handle_config_change(dev); | |
1661 | break; | |
44866521 TB |
1662 | case VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG: |
1663 | ret = vhost_user_slave_handle_vring_host_notifier(dev, &payload.area, | |
57dc0217 | 1664 | fd ? fd[0] : -1); |
44866521 | 1665 | break; |
4bbeeba0 | 1666 | default: |
0fdc465d | 1667 | error_report("Received unexpected msg type: %d.", hdr.request); |
4bbeeba0 MAL |
1668 | ret = -EINVAL; |
1669 | } | |
1670 | ||
1671 | /* | |
1672 | * REPLY_ACK feature handling. Other reply types has to be managed | |
1673 | * directly in their request handlers. | |
1674 | */ | |
69aff030 MT |
1675 | if (hdr.flags & VHOST_USER_NEED_REPLY_MASK) { |
1676 | struct iovec iovec[2]; | |
4bbeeba0 | 1677 | |
4bbeeba0 | 1678 | |
69aff030 MT |
1679 | hdr.flags &= ~VHOST_USER_NEED_REPLY_MASK; |
1680 | hdr.flags |= VHOST_USER_REPLY_MASK; | |
1681 | ||
1682 | payload.u64 = !!ret; | |
1683 | hdr.size = sizeof(payload.u64); | |
1684 | ||
1685 | iovec[0].iov_base = &hdr; | |
1686 | iovec[0].iov_len = VHOST_USER_HDR_SIZE; | |
1687 | iovec[1].iov_base = &payload; | |
1688 | iovec[1].iov_len = hdr.size; | |
1689 | ||
57dc0217 GK |
1690 | if (qio_channel_writev_all(ioc, iovec, ARRAY_SIZE(iovec), &local_err)) { |
1691 | error_report_err(local_err); | |
4bbeeba0 MAL |
1692 | goto err; |
1693 | } | |
1694 | } | |
1695 | ||
9e06080b | 1696 | goto fdcleanup; |
4bbeeba0 MAL |
1697 | |
1698 | err: | |
de62e494 | 1699 | close_slave_channel(u); |
57dc0217 | 1700 | rc = G_SOURCE_REMOVE; |
9e06080b GK |
1701 | |
1702 | fdcleanup: | |
57dc0217 GK |
1703 | if (fd) { |
1704 | for (i = 0; i < fdsize; i++) { | |
5f57fbea TB |
1705 | close(fd[i]); |
1706 | } | |
1f3a4519 | 1707 | } |
57dc0217 | 1708 | return rc; |
4bbeeba0 MAL |
1709 | } |
1710 | ||
1711 | static int vhost_setup_slave_channel(struct vhost_dev *dev) | |
1712 | { | |
1713 | VhostUserMsg msg = { | |
24e34754 MT |
1714 | .hdr.request = VHOST_USER_SET_SLAVE_REQ_FD, |
1715 | .hdr.flags = VHOST_USER_VERSION, | |
4bbeeba0 MAL |
1716 | }; |
1717 | struct vhost_user *u = dev->opaque; | |
1718 | int sv[2], ret = 0; | |
1719 | bool reply_supported = virtio_has_feature(dev->protocol_features, | |
1720 | VHOST_USER_PROTOCOL_F_REPLY_ACK); | |
57dc0217 GK |
1721 | Error *local_err = NULL; |
1722 | QIOChannel *ioc; | |
4bbeeba0 MAL |
1723 | |
1724 | if (!virtio_has_feature(dev->protocol_features, | |
1725 | VHOST_USER_PROTOCOL_F_SLAVE_REQ)) { | |
1726 | return 0; | |
1727 | } | |
1728 | ||
1729 | if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) { | |
025faa87 | 1730 | int saved_errno = errno; |
4bbeeba0 | 1731 | error_report("socketpair() failed"); |
025faa87 | 1732 | return -saved_errno; |
4bbeeba0 MAL |
1733 | } |
1734 | ||
57dc0217 GK |
1735 | ioc = QIO_CHANNEL(qio_channel_socket_new_fd(sv[0], &local_err)); |
1736 | if (!ioc) { | |
1737 | error_report_err(local_err); | |
025faa87 | 1738 | return -ECONNREFUSED; |
57dc0217 GK |
1739 | } |
1740 | u->slave_ioc = ioc; | |
db8a3772 | 1741 | slave_update_read_handler(dev, NULL); |
4bbeeba0 MAL |
1742 | |
1743 | if (reply_supported) { | |
24e34754 | 1744 | msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; |
4bbeeba0 MAL |
1745 | } |
1746 | ||
1747 | ret = vhost_user_write(dev, &msg, &sv[1], 1); | |
1748 | if (ret) { | |
1749 | goto out; | |
1750 | } | |
1751 | ||
1752 | if (reply_supported) { | |
1753 | ret = process_message_reply(dev, &msg); | |
1754 | } | |
1755 | ||
1756 | out: | |
1757 | close(sv[1]); | |
1758 | if (ret) { | |
de62e494 | 1759 | close_slave_channel(u); |
4bbeeba0 MAL |
1760 | } |
1761 | ||
1762 | return ret; | |
1763 | } | |
1764 | ||
18658a3c | 1765 | #ifdef CONFIG_LINUX |
f82c1116 DDAG |
1766 | /* |
1767 | * Called back from the postcopy fault thread when a fault is received on our | |
1768 | * ufd. | |
1769 | * TODO: This is Linux specific | |
1770 | */ | |
1771 | static int vhost_user_postcopy_fault_handler(struct PostCopyFD *pcfd, | |
1772 | void *ufd) | |
1773 | { | |
375318d0 DDAG |
1774 | struct vhost_dev *dev = pcfd->data; |
1775 | struct vhost_user *u = dev->opaque; | |
1776 | struct uffd_msg *msg = ufd; | |
1777 | uint64_t faultaddr = msg->arg.pagefault.address; | |
1778 | RAMBlock *rb = NULL; | |
1779 | uint64_t rb_offset; | |
1780 | int i; | |
1781 | ||
1782 | trace_vhost_user_postcopy_fault_handler(pcfd->idstr, faultaddr, | |
1783 | dev->mem->nregions); | |
1784 | for (i = 0; i < MIN(dev->mem->nregions, u->region_rb_len); i++) { | |
1785 | trace_vhost_user_postcopy_fault_handler_loop(i, | |
1786 | u->postcopy_client_bases[i], dev->mem->regions[i].memory_size); | |
1787 | if (faultaddr >= u->postcopy_client_bases[i]) { | |
1788 | /* Ofset of the fault address in the vhost region */ | |
1789 | uint64_t region_offset = faultaddr - u->postcopy_client_bases[i]; | |
1790 | if (region_offset < dev->mem->regions[i].memory_size) { | |
1791 | rb_offset = region_offset + u->region_rb_offset[i]; | |
1792 | trace_vhost_user_postcopy_fault_handler_found(i, | |
1793 | region_offset, rb_offset); | |
1794 | rb = u->region_rb[i]; | |
1795 | return postcopy_request_shared_page(pcfd, rb, faultaddr, | |
1796 | rb_offset); | |
1797 | } | |
1798 | } | |
1799 | } | |
1800 | error_report("%s: Failed to find region for fault %" PRIx64, | |
1801 | __func__, faultaddr); | |
1802 | return -1; | |
f82c1116 DDAG |
1803 | } |
1804 | ||
c07e3615 DDAG |
1805 | static int vhost_user_postcopy_waker(struct PostCopyFD *pcfd, RAMBlock *rb, |
1806 | uint64_t offset) | |
1807 | { | |
1808 | struct vhost_dev *dev = pcfd->data; | |
1809 | struct vhost_user *u = dev->opaque; | |
1810 | int i; | |
1811 | ||
1812 | trace_vhost_user_postcopy_waker(qemu_ram_get_idstr(rb), offset); | |
1813 | ||
1814 | if (!u) { | |
1815 | return 0; | |
1816 | } | |
1817 | /* Translate the offset into an address in the clients address space */ | |
1818 | for (i = 0; i < MIN(dev->mem->nregions, u->region_rb_len); i++) { | |
1819 | if (u->region_rb[i] == rb && | |
1820 | offset >= u->region_rb_offset[i] && | |
1821 | offset < (u->region_rb_offset[i] + | |
1822 | dev->mem->regions[i].memory_size)) { | |
1823 | uint64_t client_addr = (offset - u->region_rb_offset[i]) + | |
1824 | u->postcopy_client_bases[i]; | |
1825 | trace_vhost_user_postcopy_waker_found(client_addr); | |
1826 | return postcopy_wake_shared(pcfd, client_addr, rb); | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | trace_vhost_user_postcopy_waker_nomatch(qemu_ram_get_idstr(rb), offset); | |
1831 | return 0; | |
1832 | } | |
18658a3c | 1833 | #endif |
c07e3615 | 1834 | |
d3dff7a5 DDAG |
1835 | /* |
1836 | * Called at the start of an inbound postcopy on reception of the | |
1837 | * 'advise' command. | |
1838 | */ | |
1839 | static int vhost_user_postcopy_advise(struct vhost_dev *dev, Error **errp) | |
1840 | { | |
18658a3c | 1841 | #ifdef CONFIG_LINUX |
d3dff7a5 | 1842 | struct vhost_user *u = dev->opaque; |
4d0cf552 | 1843 | CharBackend *chr = u->user->chr; |
d3dff7a5 | 1844 | int ufd; |
025faa87 | 1845 | int ret; |
d3dff7a5 DDAG |
1846 | VhostUserMsg msg = { |
1847 | .hdr.request = VHOST_USER_POSTCOPY_ADVISE, | |
1848 | .hdr.flags = VHOST_USER_VERSION, | |
1849 | }; | |
1850 | ||
025faa87 RK |
1851 | ret = vhost_user_write(dev, &msg, NULL, 0); |
1852 | if (ret < 0) { | |
d3dff7a5 | 1853 | error_setg(errp, "Failed to send postcopy_advise to vhost"); |
025faa87 | 1854 | return ret; |
d3dff7a5 DDAG |
1855 | } |
1856 | ||
025faa87 RK |
1857 | ret = vhost_user_read(dev, &msg); |
1858 | if (ret < 0) { | |
d3dff7a5 | 1859 | error_setg(errp, "Failed to get postcopy_advise reply from vhost"); |
025faa87 | 1860 | return ret; |
d3dff7a5 DDAG |
1861 | } |
1862 | ||
1863 | if (msg.hdr.request != VHOST_USER_POSTCOPY_ADVISE) { | |
1864 | error_setg(errp, "Unexpected msg type. Expected %d received %d", | |
1865 | VHOST_USER_POSTCOPY_ADVISE, msg.hdr.request); | |
025faa87 | 1866 | return -EPROTO; |
d3dff7a5 DDAG |
1867 | } |
1868 | ||
1869 | if (msg.hdr.size) { | |
1870 | error_setg(errp, "Received bad msg size."); | |
025faa87 | 1871 | return -EPROTO; |
d3dff7a5 DDAG |
1872 | } |
1873 | ufd = qemu_chr_fe_get_msgfd(chr); | |
1874 | if (ufd < 0) { | |
1875 | error_setg(errp, "%s: Failed to get ufd", __func__); | |
025faa87 | 1876 | return -EIO; |
d3dff7a5 | 1877 | } |
ff5927ba | 1878 | qemu_socket_set_nonblock(ufd); |
d3dff7a5 | 1879 | |
f82c1116 DDAG |
1880 | /* register ufd with userfault thread */ |
1881 | u->postcopy_fd.fd = ufd; | |
1882 | u->postcopy_fd.data = dev; | |
1883 | u->postcopy_fd.handler = vhost_user_postcopy_fault_handler; | |
c07e3615 | 1884 | u->postcopy_fd.waker = vhost_user_postcopy_waker; |
f82c1116 DDAG |
1885 | u->postcopy_fd.idstr = "vhost-user"; /* Need to find unique name */ |
1886 | postcopy_register_shared_ufd(&u->postcopy_fd); | |
d3dff7a5 | 1887 | return 0; |
18658a3c PB |
1888 | #else |
1889 | error_setg(errp, "Postcopy not supported on non-Linux systems"); | |
025faa87 | 1890 | return -ENOSYS; |
18658a3c | 1891 | #endif |
d3dff7a5 DDAG |
1892 | } |
1893 | ||
6864a7b5 DDAG |
1894 | /* |
1895 | * Called at the switch to postcopy on reception of the 'listen' command. | |
1896 | */ | |
1897 | static int vhost_user_postcopy_listen(struct vhost_dev *dev, Error **errp) | |
1898 | { | |
1899 | struct vhost_user *u = dev->opaque; | |
1900 | int ret; | |
1901 | VhostUserMsg msg = { | |
1902 | .hdr.request = VHOST_USER_POSTCOPY_LISTEN, | |
1903 | .hdr.flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY_MASK, | |
1904 | }; | |
1905 | u->postcopy_listen = true; | |
025faa87 | 1906 | |
6864a7b5 | 1907 | trace_vhost_user_postcopy_listen(); |
025faa87 RK |
1908 | |
1909 | ret = vhost_user_write(dev, &msg, NULL, 0); | |
1910 | if (ret < 0) { | |
6864a7b5 | 1911 | error_setg(errp, "Failed to send postcopy_listen to vhost"); |
025faa87 | 1912 | return ret; |
6864a7b5 DDAG |
1913 | } |
1914 | ||
1915 | ret = process_message_reply(dev, &msg); | |
1916 | if (ret) { | |
1917 | error_setg(errp, "Failed to receive reply to postcopy_listen"); | |
1918 | return ret; | |
1919 | } | |
1920 | ||
1921 | return 0; | |
1922 | } | |
1923 | ||
46343570 DDAG |
1924 | /* |
1925 | * Called at the end of postcopy | |
1926 | */ | |
1927 | static int vhost_user_postcopy_end(struct vhost_dev *dev, Error **errp) | |
1928 | { | |
1929 | VhostUserMsg msg = { | |
1930 | .hdr.request = VHOST_USER_POSTCOPY_END, | |
1931 | .hdr.flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY_MASK, | |
1932 | }; | |
1933 | int ret; | |
1934 | struct vhost_user *u = dev->opaque; | |
1935 | ||
1936 | trace_vhost_user_postcopy_end_entry(); | |
025faa87 RK |
1937 | |
1938 | ret = vhost_user_write(dev, &msg, NULL, 0); | |
1939 | if (ret < 0) { | |
46343570 | 1940 | error_setg(errp, "Failed to send postcopy_end to vhost"); |
025faa87 | 1941 | return ret; |
46343570 DDAG |
1942 | } |
1943 | ||
1944 | ret = process_message_reply(dev, &msg); | |
1945 | if (ret) { | |
1946 | error_setg(errp, "Failed to receive reply to postcopy_end"); | |
1947 | return ret; | |
1948 | } | |
1949 | postcopy_unregister_shared_ufd(&u->postcopy_fd); | |
c4f75385 | 1950 | close(u->postcopy_fd.fd); |
46343570 DDAG |
1951 | u->postcopy_fd.handler = NULL; |
1952 | ||
1953 | trace_vhost_user_postcopy_end_exit(); | |
1954 | ||
1955 | return 0; | |
1956 | } | |
1957 | ||
9ccbfe14 DDAG |
1958 | static int vhost_user_postcopy_notifier(NotifierWithReturn *notifier, |
1959 | void *opaque) | |
1960 | { | |
1961 | struct PostcopyNotifyData *pnd = opaque; | |
1962 | struct vhost_user *u = container_of(notifier, struct vhost_user, | |
1963 | postcopy_notifier); | |
1964 | struct vhost_dev *dev = u->dev; | |
1965 | ||
1966 | switch (pnd->reason) { | |
1967 | case POSTCOPY_NOTIFY_PROBE: | |
1968 | if (!virtio_has_feature(dev->protocol_features, | |
1969 | VHOST_USER_PROTOCOL_F_PAGEFAULT)) { | |
1970 | /* TODO: Get the device name into this error somehow */ | |
1971 | error_setg(pnd->errp, | |
1972 | "vhost-user backend not capable of postcopy"); | |
1973 | return -ENOENT; | |
1974 | } | |
1975 | break; | |
1976 | ||
d3dff7a5 DDAG |
1977 | case POSTCOPY_NOTIFY_INBOUND_ADVISE: |
1978 | return vhost_user_postcopy_advise(dev, pnd->errp); | |
1979 | ||
6864a7b5 DDAG |
1980 | case POSTCOPY_NOTIFY_INBOUND_LISTEN: |
1981 | return vhost_user_postcopy_listen(dev, pnd->errp); | |
1982 | ||
46343570 DDAG |
1983 | case POSTCOPY_NOTIFY_INBOUND_END: |
1984 | return vhost_user_postcopy_end(dev, pnd->errp); | |
1985 | ||
9ccbfe14 DDAG |
1986 | default: |
1987 | /* We ignore notifications we don't know */ | |
1988 | break; | |
1989 | } | |
1990 | ||
1991 | return 0; | |
1992 | } | |
1993 | ||
28770ff9 KW |
1994 | static int vhost_user_backend_init(struct vhost_dev *dev, void *opaque, |
1995 | Error **errp) | |
5f6f6664 | 1996 | { |
56534930 | 1997 | uint64_t features, ram_slots; |
2152f3fe | 1998 | struct vhost_user *u; |
56534930 | 1999 | VhostUserState *vus = (VhostUserState *) opaque; |
dcb10c00 MT |
2000 | int err; |
2001 | ||
5f6f6664 NN |
2002 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); |
2003 | ||
2152f3fe | 2004 | u = g_new0(struct vhost_user, 1); |
56534930 | 2005 | u->user = vus; |
9ccbfe14 | 2006 | u->dev = dev; |
2152f3fe | 2007 | dev->opaque = u; |
5f6f6664 | 2008 | |
21e70425 | 2009 | err = vhost_user_get_features(dev, &features); |
dcb10c00 | 2010 | if (err < 0) { |
998647dc | 2011 | error_setg_errno(errp, -err, "vhost_backend_init failed"); |
f2a6e6c4 | 2012 | return err; |
dcb10c00 MT |
2013 | } |
2014 | ||
2015 | if (virtio_has_feature(features, VHOST_USER_F_PROTOCOL_FEATURES)) { | |
56534930 AB |
2016 | bool supports_f_config = vus->supports_config || |
2017 | (dev->config_ops && dev->config_ops->vhost_dev_config_notifier); | |
2018 | uint64_t protocol_features; | |
2019 | ||
dcb10c00 MT |
2020 | dev->backend_features |= 1ULL << VHOST_USER_F_PROTOCOL_FEATURES; |
2021 | ||
21e70425 | 2022 | err = vhost_user_get_u64(dev, VHOST_USER_GET_PROTOCOL_FEATURES, |
6dcdd06e | 2023 | &protocol_features); |
dcb10c00 | 2024 | if (err < 0) { |
998647dc | 2025 | error_setg_errno(errp, EPROTO, "vhost_backend_init failed"); |
28770ff9 | 2026 | return -EPROTO; |
dcb10c00 MT |
2027 | } |
2028 | ||
56534930 AB |
2029 | /* |
2030 | * We will use all the protocol features we support - although | |
2031 | * we suppress F_CONFIG if we know QEMUs internal code can not support | |
2032 | * it. | |
2033 | */ | |
2034 | protocol_features &= VHOST_USER_PROTOCOL_FEATURE_MASK; | |
2035 | ||
2036 | if (supports_f_config) { | |
2037 | if (!virtio_has_feature(protocol_features, | |
2038 | VHOST_USER_PROTOCOL_F_CONFIG)) { | |
fb38d0c9 | 2039 | error_setg(errp, "vhost-user device expecting " |
56534930 | 2040 | "VHOST_USER_PROTOCOL_F_CONFIG but the vhost-user backend does " |
fb38d0c9 | 2041 | "not support it."); |
56534930 AB |
2042 | return -EPROTO; |
2043 | } | |
2044 | } else { | |
2045 | if (virtio_has_feature(protocol_features, | |
2046 | VHOST_USER_PROTOCOL_F_CONFIG)) { | |
2047 | warn_reportf_err(*errp, "vhost-user backend supports " | |
fb38d0c9 | 2048 | "VHOST_USER_PROTOCOL_F_CONFIG but QEMU does not."); |
56534930 AB |
2049 | protocol_features &= ~(1ULL << VHOST_USER_PROTOCOL_F_CONFIG); |
2050 | } | |
1c3e5a26 MC |
2051 | } |
2052 | ||
56534930 AB |
2053 | /* final set of protocol features */ |
2054 | dev->protocol_features = protocol_features; | |
21e70425 | 2055 | err = vhost_user_set_protocol_features(dev, dev->protocol_features); |
dcb10c00 | 2056 | if (err < 0) { |
998647dc | 2057 | error_setg_errno(errp, EPROTO, "vhost_backend_init failed"); |
28770ff9 | 2058 | return -EPROTO; |
dcb10c00 | 2059 | } |
e2051e9e YL |
2060 | |
2061 | /* query the max queues we support if backend supports Multiple Queue */ | |
2062 | if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_MQ)) { | |
21e70425 MAL |
2063 | err = vhost_user_get_u64(dev, VHOST_USER_GET_QUEUE_NUM, |
2064 | &dev->max_queues); | |
e2051e9e | 2065 | if (err < 0) { |
998647dc | 2066 | error_setg_errno(errp, EPROTO, "vhost_backend_init failed"); |
28770ff9 | 2067 | return -EPROTO; |
e2051e9e | 2068 | } |
84affad1 KW |
2069 | } else { |
2070 | dev->max_queues = 1; | |
e2051e9e | 2071 | } |
84affad1 | 2072 | |
c90bd505 | 2073 | if (dev->num_queues && dev->max_queues < dev->num_queues) { |
28770ff9 KW |
2074 | error_setg(errp, "The maximum number of queues supported by the " |
2075 | "backend is %" PRIu64, dev->max_queues); | |
c90bd505 KW |
2076 | return -EINVAL; |
2077 | } | |
6dcdd06e MC |
2078 | |
2079 | if (virtio_has_feature(features, VIRTIO_F_IOMMU_PLATFORM) && | |
2080 | !(virtio_has_feature(dev->protocol_features, | |
2081 | VHOST_USER_PROTOCOL_F_SLAVE_REQ) && | |
2082 | virtio_has_feature(dev->protocol_features, | |
2083 | VHOST_USER_PROTOCOL_F_REPLY_ACK))) { | |
28770ff9 KW |
2084 | error_setg(errp, "IOMMU support requires reply-ack and " |
2085 | "slave-req protocol features."); | |
2086 | return -EINVAL; | |
6dcdd06e | 2087 | } |
6b0eff1a RN |
2088 | |
2089 | /* get max memory regions if backend supports configurable RAM slots */ | |
2090 | if (!virtio_has_feature(dev->protocol_features, | |
2091 | VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS)) { | |
27598393 | 2092 | u->user->memory_slots = VHOST_MEMORY_BASELINE_NREGIONS; |
6b0eff1a RN |
2093 | } else { |
2094 | err = vhost_user_get_max_memslots(dev, &ram_slots); | |
2095 | if (err < 0) { | |
998647dc | 2096 | error_setg_errno(errp, EPROTO, "vhost_backend_init failed"); |
28770ff9 | 2097 | return -EPROTO; |
6b0eff1a RN |
2098 | } |
2099 | ||
2100 | if (ram_slots < u->user->memory_slots) { | |
28770ff9 KW |
2101 | error_setg(errp, "The backend specified a max ram slots limit " |
2102 | "of %" PRIu64", when the prior validated limit was " | |
2103 | "%d. This limit should never decrease.", ram_slots, | |
2104 | u->user->memory_slots); | |
2105 | return -EINVAL; | |
6b0eff1a RN |
2106 | } |
2107 | ||
27598393 | 2108 | u->user->memory_slots = MIN(ram_slots, VHOST_USER_MAX_RAM_SLOTS); |
6b0eff1a | 2109 | } |
dcb10c00 MT |
2110 | } |
2111 | ||
d2fc4402 MAL |
2112 | if (dev->migration_blocker == NULL && |
2113 | !virtio_has_feature(dev->protocol_features, | |
2114 | VHOST_USER_PROTOCOL_F_LOG_SHMFD)) { | |
2115 | error_setg(&dev->migration_blocker, | |
2116 | "Migration disabled: vhost-user backend lacks " | |
2117 | "VHOST_USER_PROTOCOL_F_LOG_SHMFD feature."); | |
2118 | } | |
2119 | ||
67b3965e AM |
2120 | if (dev->vq_index == 0) { |
2121 | err = vhost_setup_slave_channel(dev); | |
2122 | if (err < 0) { | |
998647dc | 2123 | error_setg_errno(errp, EPROTO, "vhost_backend_init failed"); |
28770ff9 | 2124 | return -EPROTO; |
67b3965e | 2125 | } |
4bbeeba0 MAL |
2126 | } |
2127 | ||
9ccbfe14 DDAG |
2128 | u->postcopy_notifier.notify = vhost_user_postcopy_notifier; |
2129 | postcopy_add_notifier(&u->postcopy_notifier); | |
2130 | ||
5f6f6664 NN |
2131 | return 0; |
2132 | } | |
2133 | ||
4d0cf552 | 2134 | static int vhost_user_backend_cleanup(struct vhost_dev *dev) |
5f6f6664 | 2135 | { |
2152f3fe MAL |
2136 | struct vhost_user *u; |
2137 | ||
5f6f6664 NN |
2138 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); |
2139 | ||
2152f3fe | 2140 | u = dev->opaque; |
9ccbfe14 DDAG |
2141 | if (u->postcopy_notifier.notify) { |
2142 | postcopy_remove_notifier(&u->postcopy_notifier); | |
2143 | u->postcopy_notifier.notify = NULL; | |
2144 | } | |
c4f75385 IM |
2145 | u->postcopy_listen = false; |
2146 | if (u->postcopy_fd.handler) { | |
2147 | postcopy_unregister_shared_ufd(&u->postcopy_fd); | |
2148 | close(u->postcopy_fd.fd); | |
2149 | u->postcopy_fd.handler = NULL; | |
2150 | } | |
57dc0217 | 2151 | if (u->slave_ioc) { |
de62e494 | 2152 | close_slave_channel(u); |
4bbeeba0 | 2153 | } |
905125d0 DDAG |
2154 | g_free(u->region_rb); |
2155 | u->region_rb = NULL; | |
2156 | g_free(u->region_rb_offset); | |
2157 | u->region_rb_offset = NULL; | |
2158 | u->region_rb_len = 0; | |
2152f3fe | 2159 | g_free(u); |
5f6f6664 NN |
2160 | dev->opaque = 0; |
2161 | ||
2162 | return 0; | |
2163 | } | |
2164 | ||
fc57fd99 YL |
2165 | static int vhost_user_get_vq_index(struct vhost_dev *dev, int idx) |
2166 | { | |
2167 | assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); | |
2168 | ||
2169 | return idx; | |
2170 | } | |
2171 | ||
2ce68e4c IM |
2172 | static int vhost_user_memslots_limit(struct vhost_dev *dev) |
2173 | { | |
6b0eff1a RN |
2174 | struct vhost_user *u = dev->opaque; |
2175 | ||
2176 | return u->user->memory_slots; | |
2ce68e4c IM |
2177 | } |
2178 | ||
1be0ac21 MAL |
2179 | static bool vhost_user_requires_shm_log(struct vhost_dev *dev) |
2180 | { | |
2181 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); | |
2182 | ||
2183 | return virtio_has_feature(dev->protocol_features, | |
2184 | VHOST_USER_PROTOCOL_F_LOG_SHMFD); | |
2185 | } | |
2186 | ||
3e866365 TC |
2187 | static int vhost_user_migration_done(struct vhost_dev *dev, char* mac_addr) |
2188 | { | |
ebf2a499 | 2189 | VhostUserMsg msg = { }; |
3e866365 TC |
2190 | |
2191 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); | |
2192 | ||
2193 | /* If guest supports GUEST_ANNOUNCE do nothing */ | |
2194 | if (virtio_has_feature(dev->acked_features, VIRTIO_NET_F_GUEST_ANNOUNCE)) { | |
2195 | return 0; | |
2196 | } | |
2197 | ||
2198 | /* if backend supports VHOST_USER_PROTOCOL_F_RARP ask it to send the RARP */ | |
2199 | if (virtio_has_feature(dev->protocol_features, | |
2200 | VHOST_USER_PROTOCOL_F_RARP)) { | |
24e34754 MT |
2201 | msg.hdr.request = VHOST_USER_SEND_RARP; |
2202 | msg.hdr.flags = VHOST_USER_VERSION; | |
7f4a930e | 2203 | memcpy((char *)&msg.payload.u64, mac_addr, 6); |
24e34754 | 2204 | msg.hdr.size = sizeof(msg.payload.u64); |
3e866365 | 2205 | |
c4843a45 | 2206 | return vhost_user_write(dev, &msg, NULL, 0); |
3e866365 | 2207 | } |
025faa87 | 2208 | return -ENOTSUP; |
3e866365 TC |
2209 | } |
2210 | ||
ffe42cc1 MT |
2211 | static bool vhost_user_can_merge(struct vhost_dev *dev, |
2212 | uint64_t start1, uint64_t size1, | |
2213 | uint64_t start2, uint64_t size2) | |
2214 | { | |
07bdaa41 | 2215 | ram_addr_t offset; |
ffe42cc1 | 2216 | int mfd, rfd; |
ffe42cc1 | 2217 | |
23374a84 RN |
2218 | (void)vhost_user_get_mr_data(start1, &offset, &mfd); |
2219 | (void)vhost_user_get_mr_data(start2, &offset, &rfd); | |
ffe42cc1 MT |
2220 | |
2221 | return mfd == rfd; | |
2222 | } | |
2223 | ||
c5f048d8 MC |
2224 | static int vhost_user_net_set_mtu(struct vhost_dev *dev, uint16_t mtu) |
2225 | { | |
2226 | VhostUserMsg msg; | |
2227 | bool reply_supported = virtio_has_feature(dev->protocol_features, | |
2228 | VHOST_USER_PROTOCOL_F_REPLY_ACK); | |
025faa87 | 2229 | int ret; |
c5f048d8 MC |
2230 | |
2231 | if (!(dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_NET_MTU))) { | |
2232 | return 0; | |
2233 | } | |
2234 | ||
24e34754 | 2235 | msg.hdr.request = VHOST_USER_NET_SET_MTU; |
c5f048d8 | 2236 | msg.payload.u64 = mtu; |
24e34754 MT |
2237 | msg.hdr.size = sizeof(msg.payload.u64); |
2238 | msg.hdr.flags = VHOST_USER_VERSION; | |
c5f048d8 | 2239 | if (reply_supported) { |
24e34754 | 2240 | msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; |
c5f048d8 MC |
2241 | } |
2242 | ||
025faa87 RK |
2243 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2244 | if (ret < 0) { | |
2245 | return ret; | |
c5f048d8 MC |
2246 | } |
2247 | ||
2248 | /* If reply_ack supported, slave has to ack specified MTU is valid */ | |
2249 | if (reply_supported) { | |
3cf7daf8 | 2250 | return process_message_reply(dev, &msg); |
c5f048d8 MC |
2251 | } |
2252 | ||
2253 | return 0; | |
2254 | } | |
2255 | ||
6dcdd06e MC |
2256 | static int vhost_user_send_device_iotlb_msg(struct vhost_dev *dev, |
2257 | struct vhost_iotlb_msg *imsg) | |
2258 | { | |
025faa87 | 2259 | int ret; |
6dcdd06e | 2260 | VhostUserMsg msg = { |
24e34754 MT |
2261 | .hdr.request = VHOST_USER_IOTLB_MSG, |
2262 | .hdr.size = sizeof(msg.payload.iotlb), | |
2263 | .hdr.flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY_MASK, | |
6dcdd06e MC |
2264 | .payload.iotlb = *imsg, |
2265 | }; | |
2266 | ||
025faa87 RK |
2267 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2268 | if (ret < 0) { | |
2269 | return ret; | |
6dcdd06e MC |
2270 | } |
2271 | ||
2272 | return process_message_reply(dev, &msg); | |
2273 | } | |
2274 | ||
2275 | ||
2276 | static void vhost_user_set_iotlb_callback(struct vhost_dev *dev, int enabled) | |
2277 | { | |
2278 | /* No-op as the receive channel is not dedicated to IOTLB messages. */ | |
2279 | } | |
2280 | ||
4c3e257b | 2281 | static int vhost_user_get_config(struct vhost_dev *dev, uint8_t *config, |
50de5138 | 2282 | uint32_t config_len, Error **errp) |
4c3e257b | 2283 | { |
025faa87 | 2284 | int ret; |
4c3e257b | 2285 | VhostUserMsg msg = { |
24e34754 MT |
2286 | .hdr.request = VHOST_USER_GET_CONFIG, |
2287 | .hdr.flags = VHOST_USER_VERSION, | |
2288 | .hdr.size = VHOST_USER_CONFIG_HDR_SIZE + config_len, | |
4c3e257b CL |
2289 | }; |
2290 | ||
1c3e5a26 MC |
2291 | if (!virtio_has_feature(dev->protocol_features, |
2292 | VHOST_USER_PROTOCOL_F_CONFIG)) { | |
50de5138 KW |
2293 | error_setg(errp, "VHOST_USER_PROTOCOL_F_CONFIG not supported"); |
2294 | return -EINVAL; | |
1c3e5a26 MC |
2295 | } |
2296 | ||
50de5138 | 2297 | assert(config_len <= VHOST_USER_MAX_CONFIG_SIZE); |
4c3e257b CL |
2298 | |
2299 | msg.payload.config.offset = 0; | |
2300 | msg.payload.config.size = config_len; | |
025faa87 RK |
2301 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2302 | if (ret < 0) { | |
2303 | error_setg_errno(errp, -ret, "vhost_get_config failed"); | |
2304 | return ret; | |
4c3e257b CL |
2305 | } |
2306 | ||
025faa87 RK |
2307 | ret = vhost_user_read(dev, &msg); |
2308 | if (ret < 0) { | |
2309 | error_setg_errno(errp, -ret, "vhost_get_config failed"); | |
2310 | return ret; | |
4c3e257b CL |
2311 | } |
2312 | ||
24e34754 | 2313 | if (msg.hdr.request != VHOST_USER_GET_CONFIG) { |
50de5138 KW |
2314 | error_setg(errp, |
2315 | "Received unexpected msg type. Expected %d received %d", | |
2316 | VHOST_USER_GET_CONFIG, msg.hdr.request); | |
025faa87 | 2317 | return -EPROTO; |
4c3e257b CL |
2318 | } |
2319 | ||
24e34754 | 2320 | if (msg.hdr.size != VHOST_USER_CONFIG_HDR_SIZE + config_len) { |
50de5138 | 2321 | error_setg(errp, "Received bad msg size."); |
025faa87 | 2322 | return -EPROTO; |
4c3e257b CL |
2323 | } |
2324 | ||
2325 | memcpy(config, msg.payload.config.region, config_len); | |
2326 | ||
2327 | return 0; | |
2328 | } | |
2329 | ||
2330 | static int vhost_user_set_config(struct vhost_dev *dev, const uint8_t *data, | |
2331 | uint32_t offset, uint32_t size, uint32_t flags) | |
2332 | { | |
025faa87 | 2333 | int ret; |
4c3e257b CL |
2334 | uint8_t *p; |
2335 | bool reply_supported = virtio_has_feature(dev->protocol_features, | |
2336 | VHOST_USER_PROTOCOL_F_REPLY_ACK); | |
2337 | ||
2338 | VhostUserMsg msg = { | |
24e34754 MT |
2339 | .hdr.request = VHOST_USER_SET_CONFIG, |
2340 | .hdr.flags = VHOST_USER_VERSION, | |
2341 | .hdr.size = VHOST_USER_CONFIG_HDR_SIZE + size, | |
4c3e257b CL |
2342 | }; |
2343 | ||
1c3e5a26 MC |
2344 | if (!virtio_has_feature(dev->protocol_features, |
2345 | VHOST_USER_PROTOCOL_F_CONFIG)) { | |
025faa87 | 2346 | return -ENOTSUP; |
1c3e5a26 MC |
2347 | } |
2348 | ||
4c3e257b | 2349 | if (reply_supported) { |
24e34754 | 2350 | msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK; |
4c3e257b CL |
2351 | } |
2352 | ||
2353 | if (size > VHOST_USER_MAX_CONFIG_SIZE) { | |
025faa87 | 2354 | return -EINVAL; |
4c3e257b CL |
2355 | } |
2356 | ||
2357 | msg.payload.config.offset = offset, | |
2358 | msg.payload.config.size = size, | |
2359 | msg.payload.config.flags = flags, | |
2360 | p = msg.payload.config.region; | |
2361 | memcpy(p, data, size); | |
2362 | ||
025faa87 RK |
2363 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2364 | if (ret < 0) { | |
2365 | return ret; | |
4c3e257b CL |
2366 | } |
2367 | ||
2368 | if (reply_supported) { | |
2369 | return process_message_reply(dev, &msg); | |
2370 | } | |
2371 | ||
2372 | return 0; | |
2373 | } | |
2374 | ||
efbfeb81 GA |
2375 | static int vhost_user_crypto_create_session(struct vhost_dev *dev, |
2376 | void *session_info, | |
2377 | uint64_t *session_id) | |
2378 | { | |
025faa87 | 2379 | int ret; |
efbfeb81 GA |
2380 | bool crypto_session = virtio_has_feature(dev->protocol_features, |
2381 | VHOST_USER_PROTOCOL_F_CRYPTO_SESSION); | |
2382 | CryptoDevBackendSymSessionInfo *sess_info = session_info; | |
2383 | VhostUserMsg msg = { | |
2384 | .hdr.request = VHOST_USER_CREATE_CRYPTO_SESSION, | |
2385 | .hdr.flags = VHOST_USER_VERSION, | |
2386 | .hdr.size = sizeof(msg.payload.session), | |
2387 | }; | |
2388 | ||
2389 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER); | |
2390 | ||
2391 | if (!crypto_session) { | |
2392 | error_report("vhost-user trying to send unhandled ioctl"); | |
025faa87 | 2393 | return -ENOTSUP; |
efbfeb81 GA |
2394 | } |
2395 | ||
2396 | memcpy(&msg.payload.session.session_setup_data, sess_info, | |
2397 | sizeof(CryptoDevBackendSymSessionInfo)); | |
2398 | if (sess_info->key_len) { | |
2399 | memcpy(&msg.payload.session.key, sess_info->cipher_key, | |
2400 | sess_info->key_len); | |
2401 | } | |
2402 | if (sess_info->auth_key_len > 0) { | |
2403 | memcpy(&msg.payload.session.auth_key, sess_info->auth_key, | |
2404 | sess_info->auth_key_len); | |
2405 | } | |
025faa87 RK |
2406 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2407 | if (ret < 0) { | |
2408 | error_report("vhost_user_write() return %d, create session failed", | |
2409 | ret); | |
2410 | return ret; | |
efbfeb81 GA |
2411 | } |
2412 | ||
025faa87 RK |
2413 | ret = vhost_user_read(dev, &msg); |
2414 | if (ret < 0) { | |
2415 | error_report("vhost_user_read() return %d, create session failed", | |
2416 | ret); | |
2417 | return ret; | |
efbfeb81 GA |
2418 | } |
2419 | ||
2420 | if (msg.hdr.request != VHOST_USER_CREATE_CRYPTO_SESSION) { | |
2421 | error_report("Received unexpected msg type. Expected %d received %d", | |
2422 | VHOST_USER_CREATE_CRYPTO_SESSION, msg.hdr.request); | |
025faa87 | 2423 | return -EPROTO; |
efbfeb81 GA |
2424 | } |
2425 | ||
2426 | if (msg.hdr.size != sizeof(msg.payload.session)) { | |
2427 | error_report("Received bad msg size."); | |
025faa87 | 2428 | return -EPROTO; |
efbfeb81 GA |
2429 | } |
2430 | ||
2431 | if (msg.payload.session.session_id < 0) { | |
2432 | error_report("Bad session id: %" PRId64 "", | |
2433 | msg.payload.session.session_id); | |
025faa87 | 2434 | return -EINVAL; |
efbfeb81 GA |
2435 | } |
2436 | *session_id = msg.payload.session.session_id; | |
2437 | ||
2438 | return 0; | |
2439 | } | |
2440 | ||
2441 | static int | |
2442 | vhost_user_crypto_close_session(struct vhost_dev *dev, uint64_t session_id) | |
2443 | { | |
025faa87 | 2444 | int ret; |
efbfeb81 GA |
2445 | bool crypto_session = virtio_has_feature(dev->protocol_features, |
2446 | VHOST_USER_PROTOCOL_F_CRYPTO_SESSION); | |
2447 | VhostUserMsg msg = { | |
2448 | .hdr.request = VHOST_USER_CLOSE_CRYPTO_SESSION, | |
2449 | .hdr.flags = VHOST_USER_VERSION, | |
2450 | .hdr.size = sizeof(msg.payload.u64), | |
2451 | }; | |
2452 | msg.payload.u64 = session_id; | |
2453 | ||
2454 | if (!crypto_session) { | |
2455 | error_report("vhost-user trying to send unhandled ioctl"); | |
025faa87 | 2456 | return -ENOTSUP; |
efbfeb81 GA |
2457 | } |
2458 | ||
025faa87 RK |
2459 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2460 | if (ret < 0) { | |
2461 | error_report("vhost_user_write() return %d, close session failed", | |
2462 | ret); | |
2463 | return ret; | |
efbfeb81 GA |
2464 | } |
2465 | ||
2466 | return 0; | |
2467 | } | |
2468 | ||
988a2775 TB |
2469 | static bool vhost_user_mem_section_filter(struct vhost_dev *dev, |
2470 | MemoryRegionSection *section) | |
2471 | { | |
2472 | bool result; | |
2473 | ||
2474 | result = memory_region_get_fd(section->mr) >= 0; | |
2475 | ||
2476 | return result; | |
2477 | } | |
2478 | ||
5ad204bf XY |
2479 | static int vhost_user_get_inflight_fd(struct vhost_dev *dev, |
2480 | uint16_t queue_size, | |
2481 | struct vhost_inflight *inflight) | |
2482 | { | |
2483 | void *addr; | |
2484 | int fd; | |
025faa87 | 2485 | int ret; |
5ad204bf XY |
2486 | struct vhost_user *u = dev->opaque; |
2487 | CharBackend *chr = u->user->chr; | |
2488 | VhostUserMsg msg = { | |
2489 | .hdr.request = VHOST_USER_GET_INFLIGHT_FD, | |
2490 | .hdr.flags = VHOST_USER_VERSION, | |
2491 | .payload.inflight.num_queues = dev->nvqs, | |
2492 | .payload.inflight.queue_size = queue_size, | |
2493 | .hdr.size = sizeof(msg.payload.inflight), | |
2494 | }; | |
2495 | ||
2496 | if (!virtio_has_feature(dev->protocol_features, | |
2497 | VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)) { | |
2498 | return 0; | |
2499 | } | |
2500 | ||
025faa87 RK |
2501 | ret = vhost_user_write(dev, &msg, NULL, 0); |
2502 | if (ret < 0) { | |
2503 | return ret; | |
5ad204bf XY |
2504 | } |
2505 | ||
025faa87 RK |
2506 | ret = vhost_user_read(dev, &msg); |
2507 | if (ret < 0) { | |
2508 | return ret; | |
5ad204bf XY |
2509 | } |
2510 | ||
2511 | if (msg.hdr.request != VHOST_USER_GET_INFLIGHT_FD) { | |
2512 | error_report("Received unexpected msg type. " | |
2513 | "Expected %d received %d", | |
2514 | VHOST_USER_GET_INFLIGHT_FD, msg.hdr.request); | |
025faa87 | 2515 | return -EPROTO; |
5ad204bf XY |
2516 | } |
2517 | ||
2518 | if (msg.hdr.size != sizeof(msg.payload.inflight)) { | |
2519 | error_report("Received bad msg size."); | |
025faa87 | 2520 | return -EPROTO; |
5ad204bf XY |
2521 | } |
2522 | ||
2523 | if (!msg.payload.inflight.mmap_size) { | |
2524 | return 0; | |
2525 | } | |
2526 | ||
2527 | fd = qemu_chr_fe_get_msgfd(chr); | |
2528 | if (fd < 0) { | |
2529 | error_report("Failed to get mem fd"); | |
025faa87 | 2530 | return -EIO; |
5ad204bf XY |
2531 | } |
2532 | ||
2533 | addr = mmap(0, msg.payload.inflight.mmap_size, PROT_READ | PROT_WRITE, | |
2534 | MAP_SHARED, fd, msg.payload.inflight.mmap_offset); | |
2535 | ||
2536 | if (addr == MAP_FAILED) { | |
2537 | error_report("Failed to mmap mem fd"); | |
2538 | close(fd); | |
025faa87 | 2539 | return -EFAULT; |
5ad204bf XY |
2540 | } |
2541 | ||
2542 | inflight->addr = addr; | |
2543 | inflight->fd = fd; | |
2544 | inflight->size = msg.payload.inflight.mmap_size; | |
2545 | inflight->offset = msg.payload.inflight.mmap_offset; | |
2546 | inflight->queue_size = queue_size; | |
2547 | ||
2548 | return 0; | |
2549 | } | |
2550 | ||
2551 | static int vhost_user_set_inflight_fd(struct vhost_dev *dev, | |
2552 | struct vhost_inflight *inflight) | |
2553 | { | |
2554 | VhostUserMsg msg = { | |
2555 | .hdr.request = VHOST_USER_SET_INFLIGHT_FD, | |
2556 | .hdr.flags = VHOST_USER_VERSION, | |
2557 | .payload.inflight.mmap_size = inflight->size, | |
2558 | .payload.inflight.mmap_offset = inflight->offset, | |
2559 | .payload.inflight.num_queues = dev->nvqs, | |
2560 | .payload.inflight.queue_size = inflight->queue_size, | |
2561 | .hdr.size = sizeof(msg.payload.inflight), | |
2562 | }; | |
2563 | ||
2564 | if (!virtio_has_feature(dev->protocol_features, | |
2565 | VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)) { | |
2566 | return 0; | |
2567 | } | |
2568 | ||
025faa87 | 2569 | return vhost_user_write(dev, &msg, &inflight->fd, 1); |
5ad204bf XY |
2570 | } |
2571 | ||
503e3554 AB |
2572 | static void vhost_user_state_destroy(gpointer data) |
2573 | { | |
2574 | VhostUserHostNotifier *n = (VhostUserHostNotifier *) data; | |
2575 | if (n) { | |
2576 | vhost_user_host_notifier_remove(n, NULL); | |
2577 | object_unparent(OBJECT(&n->mr)); | |
2578 | /* | |
2579 | * We can't free until vhost_user_host_notifier_remove has | |
2580 | * done it's thing so schedule the free with RCU. | |
2581 | */ | |
2582 | g_free_rcu(n, rcu); | |
2583 | } | |
2584 | } | |
2585 | ||
0b99f224 | 2586 | bool vhost_user_init(VhostUserState *user, CharBackend *chr, Error **errp) |
4d0cf552 | 2587 | { |
0b99f224 MAL |
2588 | if (user->chr) { |
2589 | error_setg(errp, "Cannot initialize vhost-user state"); | |
2590 | return false; | |
2591 | } | |
2592 | user->chr = chr; | |
6b0eff1a | 2593 | user->memory_slots = 0; |
503e3554 AB |
2594 | user->notifiers = g_ptr_array_new_full(VIRTIO_QUEUE_MAX / 4, |
2595 | &vhost_user_state_destroy); | |
0b99f224 | 2596 | return true; |
4d0cf552 TB |
2597 | } |
2598 | ||
2599 | void vhost_user_cleanup(VhostUserState *user) | |
2600 | { | |
0b99f224 MAL |
2601 | if (!user->chr) { |
2602 | return; | |
2603 | } | |
c6effa9c | 2604 | memory_region_transaction_begin(); |
503e3554 | 2605 | user->notifiers = (GPtrArray *) g_ptr_array_free(user->notifiers, true); |
c6effa9c | 2606 | memory_region_transaction_commit(); |
0b99f224 | 2607 | user->chr = NULL; |
4d0cf552 TB |
2608 | } |
2609 | ||
5f6f6664 NN |
2610 | const VhostOps user_ops = { |
2611 | .backend_type = VHOST_BACKEND_TYPE_USER, | |
4d0cf552 TB |
2612 | .vhost_backend_init = vhost_user_backend_init, |
2613 | .vhost_backend_cleanup = vhost_user_backend_cleanup, | |
2ce68e4c | 2614 | .vhost_backend_memslots_limit = vhost_user_memslots_limit, |
21e70425 MAL |
2615 | .vhost_set_log_base = vhost_user_set_log_base, |
2616 | .vhost_set_mem_table = vhost_user_set_mem_table, | |
2617 | .vhost_set_vring_addr = vhost_user_set_vring_addr, | |
2618 | .vhost_set_vring_endian = vhost_user_set_vring_endian, | |
2619 | .vhost_set_vring_num = vhost_user_set_vring_num, | |
2620 | .vhost_set_vring_base = vhost_user_set_vring_base, | |
2621 | .vhost_get_vring_base = vhost_user_get_vring_base, | |
2622 | .vhost_set_vring_kick = vhost_user_set_vring_kick, | |
2623 | .vhost_set_vring_call = vhost_user_set_vring_call, | |
60dc3c5b | 2624 | .vhost_set_vring_err = vhost_user_set_vring_err, |
21e70425 MAL |
2625 | .vhost_set_features = vhost_user_set_features, |
2626 | .vhost_get_features = vhost_user_get_features, | |
2627 | .vhost_set_owner = vhost_user_set_owner, | |
2628 | .vhost_reset_device = vhost_user_reset_device, | |
2629 | .vhost_get_vq_index = vhost_user_get_vq_index, | |
2630 | .vhost_set_vring_enable = vhost_user_set_vring_enable, | |
1be0ac21 | 2631 | .vhost_requires_shm_log = vhost_user_requires_shm_log, |
3e866365 | 2632 | .vhost_migration_done = vhost_user_migration_done, |
ffe42cc1 | 2633 | .vhost_backend_can_merge = vhost_user_can_merge, |
c5f048d8 | 2634 | .vhost_net_set_mtu = vhost_user_net_set_mtu, |
6dcdd06e MC |
2635 | .vhost_set_iotlb_callback = vhost_user_set_iotlb_callback, |
2636 | .vhost_send_device_iotlb_msg = vhost_user_send_device_iotlb_msg, | |
4c3e257b CL |
2637 | .vhost_get_config = vhost_user_get_config, |
2638 | .vhost_set_config = vhost_user_set_config, | |
efbfeb81 GA |
2639 | .vhost_crypto_create_session = vhost_user_crypto_create_session, |
2640 | .vhost_crypto_close_session = vhost_user_crypto_close_session, | |
988a2775 | 2641 | .vhost_backend_mem_section_filter = vhost_user_mem_section_filter, |
5ad204bf XY |
2642 | .vhost_get_inflight_fd = vhost_user_get_inflight_fd, |
2643 | .vhost_set_inflight_fd = vhost_user_set_inflight_fd, | |
fc57fd99 | 2644 | }; |