| File: | src/usr.sbin/vmd/virtio.c |
| Warning: | line 308, column 4 Value stored to 'cmd' is never read |
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| 1 | /* $OpenBSD: virtio.c,v 1.110 2023/11/03 11:16:43 dv Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2015 Mike Larkin <mlarkin@openbsd.org> |
| 5 | * |
| 6 | * Permission to use, copy, modify, and distribute this software for any |
| 7 | * purpose with or without fee is hereby granted, provided that the above |
| 8 | * copyright notice and this permission notice appear in all copies. |
| 9 | * |
| 10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 17 | */ |
| 18 | |
| 19 | #include <sys/param.h> /* PAGE_SIZE */ |
| 20 | #include <sys/socket.h> |
| 21 | #include <sys/wait.h> |
| 22 | |
| 23 | #include <machine/vmmvar.h> |
| 24 | #include <dev/pci/pcireg.h> |
| 25 | #include <dev/pci/pcidevs.h> |
| 26 | #include <dev/pv/virtioreg.h> |
| 27 | #include <dev/pci/virtio_pcireg.h> |
| 28 | #include <dev/pv/vioblkreg.h> |
| 29 | #include <dev/pv/vioscsireg.h> |
| 30 | |
| 31 | #include <net/if.h> |
| 32 | #include <netinet/in.h> |
| 33 | #include <netinet/if_ether.h> |
| 34 | #include <netinet/ip.h> |
| 35 | |
| 36 | #include <errno(*__errno()).h> |
| 37 | #include <event.h> |
| 38 | #include <fcntl.h> |
| 39 | #include <poll.h> |
| 40 | #include <stddef.h> |
| 41 | #include <stdlib.h> |
| 42 | #include <string.h> |
| 43 | #include <unistd.h> |
| 44 | |
| 45 | #include "atomicio.h" |
| 46 | #include "pci.h" |
| 47 | #include "vioscsi.h" |
| 48 | #include "virtio.h" |
| 49 | #include "vmd.h" |
| 50 | #include "vmm.h" |
| 51 | |
| 52 | extern struct vmd *env; |
| 53 | extern char *__progname; |
| 54 | |
| 55 | struct viornd_dev viornd; |
| 56 | struct vioscsi_dev *vioscsi; |
| 57 | struct vmmci_dev vmmci; |
| 58 | |
| 59 | /* Devices emulated in subprocesses are inserted into this list. */ |
| 60 | SLIST_HEAD(virtio_dev_head, virtio_dev)struct virtio_dev_head { struct virtio_dev *slh_first; } virtio_devs; |
| 61 | |
| 62 | #define MAXPHYS(64 * 1024) (64 * 1024) /* max raw I/O transfer size */ |
| 63 | |
| 64 | #define VIRTIO_NET_F_MAC(1<<5) (1<<5) |
| 65 | |
| 66 | #define VMMCI_F_TIMESYNC(1<<0) (1<<0) |
| 67 | #define VMMCI_F_ACK(1<<1) (1<<1) |
| 68 | #define VMMCI_F_SYNCRTC(1<<2) (1<<2) |
| 69 | |
| 70 | #define RXQ0 0 |
| 71 | #define TXQ1 1 |
| 72 | |
| 73 | static int virtio_dev_launch(struct vmd_vm *, struct virtio_dev *); |
| 74 | static void virtio_dispatch_dev(int, short, void *); |
| 75 | static int handle_dev_msg(struct viodev_msg *, struct virtio_dev *); |
| 76 | |
| 77 | const char * |
| 78 | virtio_reg_name(uint8_t reg) |
| 79 | { |
| 80 | switch (reg) { |
| 81 | case VIRTIO_CONFIG_DEVICE_FEATURES0: return "device feature"; |
| 82 | case VIRTIO_CONFIG_GUEST_FEATURES4: return "guest feature"; |
| 83 | case VIRTIO_CONFIG_QUEUE_PFN8: return "queue address"; |
| 84 | case VIRTIO_CONFIG_QUEUE_SIZE12: return "queue size"; |
| 85 | case VIRTIO_CONFIG_QUEUE_SELECT14: return "queue select"; |
| 86 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: return "queue notify"; |
| 87 | case VIRTIO_CONFIG_DEVICE_STATUS18: return "device status"; |
| 88 | case VIRTIO_CONFIG_ISR_STATUS19: return "isr status"; |
| 89 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20...VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 3: |
| 90 | return "device config 0"; |
| 91 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 4: |
| 92 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 5: |
| 93 | return "device config 1"; |
| 94 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 8: return "device config 2"; |
| 95 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 12: return "device config 3"; |
| 96 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 16: return "device config 4"; |
| 97 | default: return "unknown"; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | uint32_t |
| 102 | vring_size(uint32_t vq_size) |
| 103 | { |
| 104 | uint32_t allocsize1, allocsize2; |
| 105 | |
| 106 | /* allocsize1: descriptor table + avail ring + pad */ |
| 107 | allocsize1 = VIRTQUEUE_ALIGN(sizeof(struct vring_desc) * vq_size(((sizeof(struct vring_desc) * vq_size + sizeof(uint16_t) * ( 2 + vq_size))+((4096)-1))& ~((4096)-1)) |
| 108 | + sizeof(uint16_t) * (2 + vq_size))(((sizeof(struct vring_desc) * vq_size + sizeof(uint16_t) * ( 2 + vq_size))+((4096)-1))& ~((4096)-1)); |
| 109 | /* allocsize2: used ring + pad */ |
| 110 | allocsize2 = VIRTQUEUE_ALIGN(sizeof(uint16_t) * 2(((sizeof(uint16_t) * 2 + sizeof(struct vring_used_elem) * vq_size )+((4096)-1))& ~((4096)-1)) |
| 111 | + sizeof(struct vring_used_elem) * vq_size)(((sizeof(uint16_t) * 2 + sizeof(struct vring_used_elem) * vq_size )+((4096)-1))& ~((4096)-1)); |
| 112 | |
| 113 | return allocsize1 + allocsize2; |
| 114 | } |
| 115 | |
| 116 | /* Update queue select */ |
| 117 | void |
| 118 | viornd_update_qs(void) |
| 119 | { |
| 120 | struct virtio_vq_info *vq_info; |
| 121 | |
| 122 | /* Invalid queue? */ |
| 123 | if (viornd.cfg.queue_select > 0) { |
| 124 | viornd.cfg.queue_size = 0; |
| 125 | return; |
| 126 | } |
| 127 | |
| 128 | vq_info = &viornd.vq[viornd.cfg.queue_select]; |
| 129 | |
| 130 | /* Update queue pfn/size based on queue select */ |
| 131 | viornd.cfg.queue_pfn = vq_info->q_gpa >> 12; |
| 132 | viornd.cfg.queue_size = vq_info->qs; |
| 133 | } |
| 134 | |
| 135 | /* Update queue address */ |
| 136 | void |
| 137 | viornd_update_qa(void) |
| 138 | { |
| 139 | struct virtio_vq_info *vq_info; |
| 140 | void *hva = NULL((void *)0); |
| 141 | |
| 142 | /* Invalid queue? */ |
| 143 | if (viornd.cfg.queue_select > 0) |
| 144 | return; |
| 145 | |
| 146 | vq_info = &viornd.vq[viornd.cfg.queue_select]; |
| 147 | vq_info->q_gpa = (uint64_t)viornd.cfg.queue_pfn * VIRTIO_PAGE_SIZE(4096); |
| 148 | |
| 149 | hva = hvaddr_mem(vq_info->q_gpa, vring_size(VIORND_QUEUE_SIZE64)); |
| 150 | if (hva == NULL((void *)0)) |
| 151 | fatalx("viornd_update_qa"); |
| 152 | vq_info->q_hva = hva; |
| 153 | } |
| 154 | |
| 155 | int |
| 156 | viornd_notifyq(void) |
| 157 | { |
| 158 | size_t sz; |
| 159 | int dxx, ret; |
| 160 | uint16_t aidx, uidx; |
| 161 | char *vr, *rnd_data; |
| 162 | struct vring_desc *desc; |
| 163 | struct vring_avail *avail; |
| 164 | struct vring_used *used; |
| 165 | struct virtio_vq_info *vq_info; |
| 166 | |
| 167 | ret = 0; |
| 168 | |
| 169 | /* Invalid queue? */ |
| 170 | if (viornd.cfg.queue_notify > 0) |
| 171 | return (0); |
| 172 | |
| 173 | vq_info = &viornd.vq[viornd.cfg.queue_notify]; |
| 174 | vr = vq_info->q_hva; |
| 175 | if (vr == NULL((void *)0)) |
| 176 | fatalx("%s: null vring", __func__); |
| 177 | |
| 178 | desc = (struct vring_desc *)(vr); |
| 179 | avail = (struct vring_avail *)(vr + vq_info->vq_availoffset); |
| 180 | used = (struct vring_used *)(vr + vq_info->vq_usedoffset); |
| 181 | |
| 182 | aidx = avail->idx & VIORND_QUEUE_MASK(64 - 1); |
| 183 | uidx = used->idx & VIORND_QUEUE_MASK(64 - 1); |
| 184 | |
| 185 | dxx = avail->ring[aidx] & VIORND_QUEUE_MASK(64 - 1); |
| 186 | |
| 187 | sz = desc[dxx].len; |
| 188 | if (sz > MAXPHYS(64 * 1024)) |
| 189 | fatalx("viornd descriptor size too large (%zu)", sz); |
| 190 | |
| 191 | rnd_data = malloc(sz); |
| 192 | |
| 193 | if (rnd_data != NULL((void *)0)) { |
| 194 | arc4random_buf(rnd_data, sz); |
| 195 | if (write_mem(desc[dxx].addr, rnd_data, sz)) { |
| 196 | log_warnx("viornd: can't write random data @ " |
| 197 | "0x%llx", |
| 198 | desc[dxx].addr); |
| 199 | } else { |
| 200 | /* ret == 1 -> interrupt needed */ |
| 201 | /* XXX check VIRTIO_F_NO_INTR */ |
| 202 | ret = 1; |
| 203 | viornd.cfg.isr_status = 1; |
| 204 | used->ring[uidx].id = dxx; |
| 205 | used->ring[uidx].len = sz; |
| 206 | __sync_synchronize(); |
| 207 | used->idx++; |
| 208 | } |
| 209 | free(rnd_data); |
| 210 | } else |
| 211 | fatal("memory allocation error for viornd data"); |
| 212 | |
| 213 | return (ret); |
| 214 | } |
| 215 | |
| 216 | int |
| 217 | virtio_rnd_io(int dir, uint16_t reg, uint32_t *data, uint8_t *intr, |
| 218 | void *unused, uint8_t sz) |
| 219 | { |
| 220 | *intr = 0xFF; |
| 221 | |
| 222 | if (dir == 0) { |
| 223 | switch (reg) { |
| 224 | case VIRTIO_CONFIG_DEVICE_FEATURES0: |
| 225 | case VIRTIO_CONFIG_QUEUE_SIZE12: |
| 226 | case VIRTIO_CONFIG_ISR_STATUS19: |
| 227 | log_warnx("%s: illegal write %x to %s", |
| 228 | __progname, *data, virtio_reg_name(reg)); |
| 229 | break; |
| 230 | case VIRTIO_CONFIG_GUEST_FEATURES4: |
| 231 | viornd.cfg.guest_feature = *data; |
| 232 | break; |
| 233 | case VIRTIO_CONFIG_QUEUE_PFN8: |
| 234 | viornd.cfg.queue_pfn = *data; |
| 235 | viornd_update_qa(); |
| 236 | break; |
| 237 | case VIRTIO_CONFIG_QUEUE_SELECT14: |
| 238 | viornd.cfg.queue_select = *data; |
| 239 | viornd_update_qs(); |
| 240 | break; |
| 241 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: |
| 242 | viornd.cfg.queue_notify = *data; |
| 243 | if (viornd_notifyq()) |
| 244 | *intr = 1; |
| 245 | break; |
| 246 | case VIRTIO_CONFIG_DEVICE_STATUS18: |
| 247 | viornd.cfg.device_status = *data; |
| 248 | break; |
| 249 | } |
| 250 | } else { |
| 251 | switch (reg) { |
| 252 | case VIRTIO_CONFIG_DEVICE_FEATURES0: |
| 253 | *data = viornd.cfg.device_feature; |
| 254 | break; |
| 255 | case VIRTIO_CONFIG_GUEST_FEATURES4: |
| 256 | *data = viornd.cfg.guest_feature; |
| 257 | break; |
| 258 | case VIRTIO_CONFIG_QUEUE_PFN8: |
| 259 | *data = viornd.cfg.queue_pfn; |
| 260 | break; |
| 261 | case VIRTIO_CONFIG_QUEUE_SIZE12: |
| 262 | *data = viornd.cfg.queue_size; |
| 263 | break; |
| 264 | case VIRTIO_CONFIG_QUEUE_SELECT14: |
| 265 | *data = viornd.cfg.queue_select; |
| 266 | break; |
| 267 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: |
| 268 | *data = viornd.cfg.queue_notify; |
| 269 | break; |
| 270 | case VIRTIO_CONFIG_DEVICE_STATUS18: |
| 271 | *data = viornd.cfg.device_status; |
| 272 | break; |
| 273 | case VIRTIO_CONFIG_ISR_STATUS19: |
| 274 | *data = viornd.cfg.isr_status; |
| 275 | viornd.cfg.isr_status = 0; |
| 276 | vcpu_deassert_pic_irq(viornd.vm_id, 0, viornd.irq); |
| 277 | break; |
| 278 | } |
| 279 | } |
| 280 | return (0); |
| 281 | } |
| 282 | |
| 283 | int |
| 284 | vmmci_ctl(unsigned int cmd) |
| 285 | { |
| 286 | struct timeval tv = { 0, 0 }; |
| 287 | |
| 288 | if ((vmmci.cfg.device_status & |
| 289 | VIRTIO_CONFIG_DEVICE_STATUS_DRIVER_OK4) == 0) |
| 290 | return (-1); |
| 291 | |
| 292 | if (cmd == vmmci.cmd) |
| 293 | return (0); |
| 294 | |
| 295 | switch (cmd) { |
| 296 | case VMMCI_NONE: |
| 297 | break; |
| 298 | case VMMCI_SHUTDOWN: |
| 299 | case VMMCI_REBOOT: |
| 300 | /* Update command */ |
| 301 | vmmci.cmd = cmd; |
| 302 | |
| 303 | /* |
| 304 | * vmm VMs do not support powerdown, send a reboot request |
| 305 | * instead and turn it off after the triple fault. |
| 306 | */ |
| 307 | if (cmd == VMMCI_SHUTDOWN) |
| 308 | cmd = VMMCI_REBOOT; |
Value stored to 'cmd' is never read | |
| 309 | |
| 310 | /* Trigger interrupt */ |
| 311 | vmmci.cfg.isr_status = VIRTIO_CONFIG_ISR_CONFIG_CHANGE2; |
| 312 | vcpu_assert_pic_irq(vmmci.vm_id, 0, vmmci.irq); |
| 313 | |
| 314 | /* Add ACK timeout */ |
| 315 | tv.tv_sec = VMMCI_TIMEOUT3; |
| 316 | evtimer_add(&vmmci.timeout, &tv)event_add(&vmmci.timeout, &tv); |
| 317 | break; |
| 318 | case VMMCI_SYNCRTC: |
| 319 | if (vmmci.cfg.guest_feature & VMMCI_F_SYNCRTC(1<<2)) { |
| 320 | /* RTC updated, request guest VM resync of its RTC */ |
| 321 | vmmci.cmd = cmd; |
| 322 | |
| 323 | vmmci.cfg.isr_status = VIRTIO_CONFIG_ISR_CONFIG_CHANGE2; |
| 324 | vcpu_assert_pic_irq(vmmci.vm_id, 0, vmmci.irq); |
| 325 | } else { |
| 326 | log_debug("%s: RTC sync skipped (guest does not " |
| 327 | "support RTC sync)\n", __func__); |
| 328 | } |
| 329 | break; |
| 330 | default: |
| 331 | fatalx("invalid vmmci command: %d", cmd); |
| 332 | } |
| 333 | |
| 334 | return (0); |
| 335 | } |
| 336 | |
| 337 | void |
| 338 | vmmci_ack(unsigned int cmd) |
| 339 | { |
| 340 | struct timeval tv = { 0, 0 }; |
| 341 | |
| 342 | switch (cmd) { |
| 343 | case VMMCI_NONE: |
| 344 | break; |
| 345 | case VMMCI_SHUTDOWN: |
| 346 | /* |
| 347 | * The shutdown was requested by the VM if we don't have |
| 348 | * a pending shutdown request. In this case add a short |
| 349 | * timeout to give the VM a chance to reboot before the |
| 350 | * timer is expired. |
| 351 | */ |
| 352 | if (vmmci.cmd == 0) { |
| 353 | log_debug("%s: vm %u requested shutdown", __func__, |
| 354 | vmmci.vm_id); |
| 355 | tv.tv_sec = VMMCI_TIMEOUT3; |
| 356 | evtimer_add(&vmmci.timeout, &tv)event_add(&vmmci.timeout, &tv); |
| 357 | return; |
| 358 | } |
| 359 | /* FALLTHROUGH */ |
| 360 | case VMMCI_REBOOT: |
| 361 | /* |
| 362 | * If the VM acknowledged our shutdown request, give it |
| 363 | * enough time to shutdown or reboot gracefully. This |
| 364 | * might take a considerable amount of time (running |
| 365 | * rc.shutdown on the VM), so increase the timeout before |
| 366 | * killing it forcefully. |
| 367 | */ |
| 368 | if (cmd == vmmci.cmd && |
| 369 | evtimer_pending(&vmmci.timeout, NULL)event_pending(&vmmci.timeout, 0x01, ((void *)0))) { |
| 370 | log_debug("%s: vm %u acknowledged shutdown request", |
| 371 | __func__, vmmci.vm_id); |
| 372 | tv.tv_sec = VMMCI_SHUTDOWN_TIMEOUT120; |
| 373 | evtimer_add(&vmmci.timeout, &tv)event_add(&vmmci.timeout, &tv); |
| 374 | } |
| 375 | break; |
| 376 | case VMMCI_SYNCRTC: |
| 377 | log_debug("%s: vm %u acknowledged RTC sync request", |
| 378 | __func__, vmmci.vm_id); |
| 379 | vmmci.cmd = VMMCI_NONE; |
| 380 | break; |
| 381 | default: |
| 382 | log_warnx("%s: illegal request %u", __func__, cmd); |
| 383 | break; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | void |
| 388 | vmmci_timeout(int fd, short type, void *arg) |
| 389 | { |
| 390 | log_debug("%s: vm %u shutdown", __progname, vmmci.vm_id); |
| 391 | vm_shutdown(vmmci.cmd == VMMCI_REBOOT ? VMMCI_REBOOT : VMMCI_SHUTDOWN); |
| 392 | } |
| 393 | |
| 394 | int |
| 395 | vmmci_io(int dir, uint16_t reg, uint32_t *data, uint8_t *intr, |
| 396 | void *unused, uint8_t sz) |
| 397 | { |
| 398 | *intr = 0xFF; |
| 399 | |
| 400 | if (dir == 0) { |
| 401 | switch (reg) { |
| 402 | case VIRTIO_CONFIG_DEVICE_FEATURES0: |
| 403 | case VIRTIO_CONFIG_QUEUE_SIZE12: |
| 404 | case VIRTIO_CONFIG_ISR_STATUS19: |
| 405 | log_warnx("%s: illegal write %x to %s", |
| 406 | __progname, *data, virtio_reg_name(reg)); |
| 407 | break; |
| 408 | case VIRTIO_CONFIG_GUEST_FEATURES4: |
| 409 | vmmci.cfg.guest_feature = *data; |
| 410 | break; |
| 411 | case VIRTIO_CONFIG_QUEUE_PFN8: |
| 412 | vmmci.cfg.queue_pfn = *data; |
| 413 | break; |
| 414 | case VIRTIO_CONFIG_QUEUE_SELECT14: |
| 415 | vmmci.cfg.queue_select = *data; |
| 416 | break; |
| 417 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: |
| 418 | vmmci.cfg.queue_notify = *data; |
| 419 | break; |
| 420 | case VIRTIO_CONFIG_DEVICE_STATUS18: |
| 421 | vmmci.cfg.device_status = *data; |
| 422 | break; |
| 423 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20: |
| 424 | vmmci_ack(*data); |
| 425 | break; |
| 426 | } |
| 427 | } else { |
| 428 | switch (reg) { |
| 429 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20: |
| 430 | *data = vmmci.cmd; |
| 431 | break; |
| 432 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 4: |
| 433 | /* Update time once when reading the first register */ |
| 434 | gettimeofday(&vmmci.time, NULL((void *)0)); |
| 435 | *data = (uint64_t)vmmci.time.tv_sec; |
| 436 | break; |
| 437 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 8: |
| 438 | *data = (uint64_t)vmmci.time.tv_sec << 32; |
| 439 | break; |
| 440 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 12: |
| 441 | *data = (uint64_t)vmmci.time.tv_usec; |
| 442 | break; |
| 443 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 16: |
| 444 | *data = (uint64_t)vmmci.time.tv_usec << 32; |
| 445 | break; |
| 446 | case VIRTIO_CONFIG_DEVICE_FEATURES0: |
| 447 | *data = vmmci.cfg.device_feature; |
| 448 | break; |
| 449 | case VIRTIO_CONFIG_GUEST_FEATURES4: |
| 450 | *data = vmmci.cfg.guest_feature; |
| 451 | break; |
| 452 | case VIRTIO_CONFIG_QUEUE_PFN8: |
| 453 | *data = vmmci.cfg.queue_pfn; |
| 454 | break; |
| 455 | case VIRTIO_CONFIG_QUEUE_SIZE12: |
| 456 | *data = vmmci.cfg.queue_size; |
| 457 | break; |
| 458 | case VIRTIO_CONFIG_QUEUE_SELECT14: |
| 459 | *data = vmmci.cfg.queue_select; |
| 460 | break; |
| 461 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: |
| 462 | *data = vmmci.cfg.queue_notify; |
| 463 | break; |
| 464 | case VIRTIO_CONFIG_DEVICE_STATUS18: |
| 465 | *data = vmmci.cfg.device_status; |
| 466 | break; |
| 467 | case VIRTIO_CONFIG_ISR_STATUS19: |
| 468 | *data = vmmci.cfg.isr_status; |
| 469 | vmmci.cfg.isr_status = 0; |
| 470 | vcpu_deassert_pic_irq(vmmci.vm_id, 0, vmmci.irq); |
| 471 | break; |
| 472 | } |
| 473 | } |
| 474 | return (0); |
| 475 | } |
| 476 | |
| 477 | int |
| 478 | virtio_get_base(int fd, char *path, size_t npath, int type, const char *dpath) |
| 479 | { |
| 480 | switch (type) { |
| 481 | case VMDF_RAW0x01: |
| 482 | return 0; |
| 483 | case VMDF_QCOW20x02: |
| 484 | return virtio_qcow2_get_base(fd, path, npath, dpath); |
| 485 | } |
| 486 | log_warnx("%s: invalid disk format", __func__); |
| 487 | return -1; |
| 488 | } |
| 489 | |
| 490 | void |
| 491 | virtio_init(struct vmd_vm *vm, int child_cdrom, |
| 492 | int child_disks[][VM_MAX_BASE_PER_DISK4], int *child_taps) |
| 493 | { |
| 494 | struct vmop_create_params *vmc = &vm->vm_params; |
| 495 | struct vm_create_params *vcp = &vmc->vmc_params; |
| 496 | struct virtio_dev *dev; |
| 497 | uint8_t id; |
| 498 | uint8_t i, j; |
| 499 | |
| 500 | /* Virtio entropy device */ |
| 501 | if (pci_add_device(&id, PCI_VENDOR_QUMRANET0x1af4, |
| 502 | PCI_PRODUCT_QUMRANET_VIO_RNG0x1005, PCI_CLASS_SYSTEM0x08, |
| 503 | PCI_SUBCLASS_SYSTEM_MISC0x80, |
| 504 | PCI_VENDOR_OPENBSD0x0b5d, |
| 505 | PCI_PRODUCT_VIRTIO_ENTROPY4, 1, NULL((void *)0))) { |
| 506 | log_warnx("%s: can't add PCI virtio rng device", |
| 507 | __progname); |
| 508 | return; |
| 509 | } |
| 510 | |
| 511 | if (pci_add_bar(id, PCI_MAPREG_TYPE_IO0x00000001, virtio_rnd_io, NULL((void *)0))) { |
| 512 | log_warnx("%s: can't add bar for virtio rng device", |
| 513 | __progname); |
| 514 | return; |
| 515 | } |
| 516 | |
| 517 | memset(&viornd, 0, sizeof(viornd)); |
| 518 | viornd.vq[0].qs = VIORND_QUEUE_SIZE64; |
| 519 | viornd.vq[0].vq_availoffset = sizeof(struct vring_desc) * |
| 520 | VIORND_QUEUE_SIZE64; |
| 521 | viornd.vq[0].vq_usedoffset = VIRTQUEUE_ALIGN((((sizeof(struct vring_desc) * 64 + sizeof(uint16_t) * (2 + 64 ))+((4096)-1))& ~((4096)-1)) |
| 522 | sizeof(struct vring_desc) * VIORND_QUEUE_SIZE(((sizeof(struct vring_desc) * 64 + sizeof(uint16_t) * (2 + 64 ))+((4096)-1))& ~((4096)-1)) |
| 523 | + sizeof(uint16_t) * (2 + VIORND_QUEUE_SIZE))(((sizeof(struct vring_desc) * 64 + sizeof(uint16_t) * (2 + 64 ))+((4096)-1))& ~((4096)-1)); |
| 524 | viornd.pci_id = id; |
| 525 | viornd.irq = pci_get_dev_irq(id); |
| 526 | viornd.vm_id = vcp->vcp_id; |
| 527 | |
| 528 | SLIST_INIT(&virtio_devs){ ((&virtio_devs)->slh_first) = ((void *)0); }; |
| 529 | |
| 530 | if (vmc->vmc_nnics > 0) { |
| 531 | for (i = 0; i < vmc->vmc_nnics; i++) { |
| 532 | dev = calloc(1, sizeof(struct virtio_dev)); |
| 533 | if (dev == NULL((void *)0)) { |
| 534 | log_warn("%s: calloc failure allocating vionet", |
| 535 | __progname); |
| 536 | return; |
| 537 | } |
| 538 | /* Virtio network */ |
| 539 | dev->dev_type = VMD_DEVTYPE_NET'n'; |
| 540 | |
| 541 | if (pci_add_device(&id, PCI_VENDOR_QUMRANET0x1af4, |
| 542 | PCI_PRODUCT_QUMRANET_VIO_NET0x1000, PCI_CLASS_SYSTEM0x08, |
| 543 | PCI_SUBCLASS_SYSTEM_MISC0x80, PCI_VENDOR_OPENBSD0x0b5d, |
| 544 | PCI_PRODUCT_VIRTIO_NETWORK1, 1, NULL((void *)0))) { |
| 545 | log_warnx("%s: can't add PCI virtio net device", |
| 546 | __progname); |
| 547 | return; |
| 548 | } |
| 549 | dev->pci_id = id; |
| 550 | dev->sync_fd = -1; |
| 551 | dev->async_fd = -1; |
| 552 | dev->vm_id = vcp->vcp_id; |
| 553 | dev->vm_vmid = vm->vm_vmid; |
| 554 | dev->irq = pci_get_dev_irq(id); |
| 555 | |
| 556 | /* The vionet pci bar function is called by the vcpu. */ |
| 557 | if (pci_add_bar(id, PCI_MAPREG_TYPE_IO0x00000001, virtio_pci_io, |
| 558 | dev)) { |
| 559 | log_warnx("%s: can't add bar for virtio net " |
| 560 | "device", __progname); |
| 561 | return; |
| 562 | } |
| 563 | |
| 564 | dev->vionet.vq[RXQ0].qs = VIONET_QUEUE_SIZE256; |
| 565 | dev->vionet.vq[RXQ0].vq_availoffset = |
| 566 | sizeof(struct vring_desc) * VIONET_QUEUE_SIZE256; |
| 567 | dev->vionet.vq[RXQ0].vq_usedoffset = VIRTQUEUE_ALIGN((((sizeof(struct vring_desc) * 256 + sizeof(uint16_t) * (2 + 256 ))+((4096)-1))& ~((4096)-1)) |
| 568 | sizeof(struct vring_desc) * VIONET_QUEUE_SIZE(((sizeof(struct vring_desc) * 256 + sizeof(uint16_t) * (2 + 256 ))+((4096)-1))& ~((4096)-1)) |
| 569 | + sizeof(uint16_t) * (2 + VIONET_QUEUE_SIZE))(((sizeof(struct vring_desc) * 256 + sizeof(uint16_t) * (2 + 256 ))+((4096)-1))& ~((4096)-1)); |
| 570 | dev->vionet.vq[RXQ0].last_avail = 0; |
| 571 | dev->vionet.vq[RXQ0].notified_avail = 0; |
| 572 | |
| 573 | dev->vionet.vq[TXQ1].qs = VIONET_QUEUE_SIZE256; |
| 574 | dev->vionet.vq[TXQ1].vq_availoffset = |
| 575 | sizeof(struct vring_desc) * VIONET_QUEUE_SIZE256; |
| 576 | dev->vionet.vq[TXQ1].vq_usedoffset = VIRTQUEUE_ALIGN((((sizeof(struct vring_desc) * 256 + sizeof(uint16_t) * (2 + 256 ))+((4096)-1))& ~((4096)-1)) |
| 577 | sizeof(struct vring_desc) * VIONET_QUEUE_SIZE(((sizeof(struct vring_desc) * 256 + sizeof(uint16_t) * (2 + 256 ))+((4096)-1))& ~((4096)-1)) |
| 578 | + sizeof(uint16_t) * (2 + VIONET_QUEUE_SIZE))(((sizeof(struct vring_desc) * 256 + sizeof(uint16_t) * (2 + 256 ))+((4096)-1))& ~((4096)-1)); |
| 579 | dev->vionet.vq[TXQ1].last_avail = 0; |
| 580 | dev->vionet.vq[TXQ1].notified_avail = 0; |
| 581 | |
| 582 | dev->vionet.data_fd = child_taps[i]; |
| 583 | |
| 584 | /* MAC address has been assigned by the parent */ |
| 585 | memcpy(&dev->vionet.mac, &vmc->vmc_macs[i], 6); |
| 586 | dev->vionet.cfg.device_feature = VIRTIO_NET_F_MAC(1<<5); |
| 587 | |
| 588 | dev->vionet.lockedmac = |
| 589 | vmc->vmc_ifflags[i] & VMIFF_LOCKED0x02 ? 1 : 0; |
| 590 | dev->vionet.local = |
| 591 | vmc->vmc_ifflags[i] & VMIFF_LOCAL0x04 ? 1 : 0; |
| 592 | if (i == 0 && vmc->vmc_bootdevice & VMBOOTDEV_NET3) |
| 593 | dev->vionet.pxeboot = 1; |
| 594 | memcpy(&dev->vionet.local_prefix, |
| 595 | &env->vmd_cfg.cfg_localprefix, |
| 596 | sizeof(dev->vionet.local_prefix)); |
| 597 | log_debug("%s: vm \"%s\" vio%u lladdr %s%s%s%s", |
| 598 | __func__, vcp->vcp_name, i, |
| 599 | ether_ntoa((void *)dev->vionet.mac), |
| 600 | dev->vionet.lockedmac ? ", locked" : "", |
| 601 | dev->vionet.local ? ", local" : "", |
| 602 | dev->vionet.pxeboot ? ", pxeboot" : ""); |
| 603 | |
| 604 | /* Add the vionet to our device list. */ |
| 605 | dev->vionet.idx = i; |
| 606 | SLIST_INSERT_HEAD(&virtio_devs, dev, dev_next)do { (dev)->dev_next.sle_next = (&virtio_devs)->slh_first ; (&virtio_devs)->slh_first = (dev); } while (0); |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | if (vmc->vmc_ndisks > 0) { |
| 611 | for (i = 0; i < vmc->vmc_ndisks; i++) { |
| 612 | dev = calloc(1, sizeof(struct virtio_dev)); |
| 613 | if (dev == NULL((void *)0)) { |
| 614 | log_warn("%s: calloc failure allocating vioblk", |
| 615 | __progname); |
| 616 | return; |
| 617 | } |
| 618 | |
| 619 | /* One vioblk device for each disk defined in vcp */ |
| 620 | dev->dev_type = VMD_DEVTYPE_DISK'd'; |
| 621 | |
| 622 | if (pci_add_device(&id, PCI_VENDOR_QUMRANET0x1af4, |
| 623 | PCI_PRODUCT_QUMRANET_VIO_BLOCK0x1001, |
| 624 | PCI_CLASS_MASS_STORAGE0x01, |
| 625 | PCI_SUBCLASS_MASS_STORAGE_SCSI0x00, |
| 626 | PCI_VENDOR_OPENBSD0x0b5d, |
| 627 | PCI_PRODUCT_VIRTIO_BLOCK2, 1, NULL((void *)0))) { |
| 628 | log_warnx("%s: can't add PCI virtio block " |
| 629 | "device", __progname); |
| 630 | return; |
| 631 | } |
| 632 | dev->pci_id = id; |
| 633 | dev->sync_fd = -1; |
| 634 | dev->async_fd = -1; |
| 635 | dev->vm_id = vcp->vcp_id; |
| 636 | dev->vm_vmid = vm->vm_vmid; |
| 637 | dev->irq = pci_get_dev_irq(id); |
| 638 | |
| 639 | if (pci_add_bar(id, PCI_MAPREG_TYPE_IO0x00000001, virtio_pci_io, |
| 640 | &dev->vioblk)) { |
| 641 | log_warnx("%s: can't add bar for virtio block " |
| 642 | "device", __progname); |
| 643 | return; |
| 644 | } |
| 645 | dev->vioblk.vq[0].qs = VIOBLK_QUEUE_SIZE128; |
| 646 | dev->vioblk.vq[0].vq_availoffset = |
| 647 | sizeof(struct vring_desc) * VIOBLK_QUEUE_SIZE128; |
| 648 | dev->vioblk.vq[0].vq_usedoffset = VIRTQUEUE_ALIGN((((sizeof(struct vring_desc) * 128 + sizeof(uint16_t) * (2 + 128 ))+((4096)-1))& ~((4096)-1)) |
| 649 | sizeof(struct vring_desc) * VIOBLK_QUEUE_SIZE(((sizeof(struct vring_desc) * 128 + sizeof(uint16_t) * (2 + 128 ))+((4096)-1))& ~((4096)-1)) |
| 650 | + sizeof(uint16_t) * (2 + VIOBLK_QUEUE_SIZE))(((sizeof(struct vring_desc) * 128 + sizeof(uint16_t) * (2 + 128 ))+((4096)-1))& ~((4096)-1)); |
| 651 | dev->vioblk.vq[0].last_avail = 0; |
| 652 | dev->vioblk.cfg.device_feature = |
| 653 | VIRTIO_BLK_F_SEG_MAX(1ULL<<2); |
| 654 | dev->vioblk.seg_max = VIOBLK_SEG_MAX(128 - 2); |
| 655 | |
| 656 | /* |
| 657 | * Initialize disk fds to an invalid fd (-1), then |
| 658 | * set any child disk fds. |
| 659 | */ |
| 660 | memset(&dev->vioblk.disk_fd, -1, |
| 661 | sizeof(dev->vioblk.disk_fd)); |
| 662 | dev->vioblk.ndisk_fd = vmc->vmc_diskbases[i]; |
| 663 | for (j = 0; j < dev->vioblk.ndisk_fd; j++) |
| 664 | dev->vioblk.disk_fd[j] = child_disks[i][j]; |
| 665 | |
| 666 | dev->vioblk.idx = i; |
| 667 | SLIST_INSERT_HEAD(&virtio_devs, dev, dev_next)do { (dev)->dev_next.sle_next = (&virtio_devs)->slh_first ; (&virtio_devs)->slh_first = (dev); } while (0); |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | /* |
| 672 | * Launch virtio devices that support subprocess execution. |
| 673 | */ |
| 674 | SLIST_FOREACH(dev, &virtio_devs, dev_next)for((dev) = ((&virtio_devs)->slh_first); (dev) != ((void *)0); (dev) = ((dev)->dev_next.sle_next)) { |
| 675 | if (virtio_dev_launch(vm, dev) != 0) |
| 676 | fatalx("failed to launch virtio device"); |
| 677 | } |
| 678 | |
| 679 | /* vioscsi cdrom */ |
| 680 | if (strlen(vmc->vmc_cdrom)) { |
| 681 | vioscsi = calloc(1, sizeof(struct vioscsi_dev)); |
| 682 | if (vioscsi == NULL((void *)0)) { |
| 683 | log_warn("%s: calloc failure allocating vioscsi", |
| 684 | __progname); |
| 685 | return; |
| 686 | } |
| 687 | |
| 688 | if (pci_add_device(&id, PCI_VENDOR_QUMRANET0x1af4, |
| 689 | PCI_PRODUCT_QUMRANET_VIO_SCSI0x1004, |
| 690 | PCI_CLASS_MASS_STORAGE0x01, |
| 691 | PCI_SUBCLASS_MASS_STORAGE_SCSI0x00, |
| 692 | PCI_VENDOR_OPENBSD0x0b5d, |
| 693 | PCI_PRODUCT_VIRTIO_SCSI8, 1, NULL((void *)0))) { |
| 694 | log_warnx("%s: can't add PCI vioscsi device", |
| 695 | __progname); |
| 696 | return; |
| 697 | } |
| 698 | |
| 699 | if (pci_add_bar(id, PCI_MAPREG_TYPE_IO0x00000001, vioscsi_io, vioscsi)) { |
| 700 | log_warnx("%s: can't add bar for vioscsi device", |
| 701 | __progname); |
| 702 | return; |
| 703 | } |
| 704 | |
| 705 | for (i = 0; i < VIRTIO_MAX_QUEUES3; i++) { |
| 706 | vioscsi->vq[i].qs = VIOSCSI_QUEUE_SIZE128; |
| 707 | vioscsi->vq[i].vq_availoffset = |
| 708 | sizeof(struct vring_desc) * VIOSCSI_QUEUE_SIZE128; |
| 709 | vioscsi->vq[i].vq_usedoffset = VIRTQUEUE_ALIGN((((sizeof(struct vring_desc) * 128 + sizeof(uint16_t) * (2 + 128 ))+((4096)-1))& ~((4096)-1)) |
| 710 | sizeof(struct vring_desc) * VIOSCSI_QUEUE_SIZE(((sizeof(struct vring_desc) * 128 + sizeof(uint16_t) * (2 + 128 ))+((4096)-1))& ~((4096)-1)) |
| 711 | + sizeof(uint16_t) * (2 + VIOSCSI_QUEUE_SIZE))(((sizeof(struct vring_desc) * 128 + sizeof(uint16_t) * (2 + 128 ))+((4096)-1))& ~((4096)-1)); |
| 712 | vioscsi->vq[i].last_avail = 0; |
| 713 | } |
| 714 | if (virtio_raw_init(&vioscsi->file, &vioscsi->sz, &child_cdrom, |
| 715 | 1) == -1) { |
| 716 | log_warnx("%s: unable to determine iso format", |
| 717 | __func__); |
| 718 | return; |
| 719 | } |
| 720 | vioscsi->locked = 0; |
| 721 | vioscsi->lba = 0; |
| 722 | vioscsi->n_blocks = vioscsi->sz / VIOSCSI_BLOCK_SIZE_CDROM2048; |
| 723 | vioscsi->max_xfer = VIOSCSI_BLOCK_SIZE_CDROM2048; |
| 724 | vioscsi->pci_id = id; |
| 725 | vioscsi->vm_id = vcp->vcp_id; |
| 726 | vioscsi->irq = pci_get_dev_irq(id); |
| 727 | } |
| 728 | |
| 729 | /* virtio control device */ |
| 730 | if (pci_add_device(&id, PCI_VENDOR_OPENBSD0x0b5d, |
| 731 | PCI_PRODUCT_OPENBSD_CONTROL0x0777, |
| 732 | PCI_CLASS_COMMUNICATIONS0x07, |
| 733 | PCI_SUBCLASS_COMMUNICATIONS_MISC0x80, |
| 734 | PCI_VENDOR_OPENBSD0x0b5d, |
| 735 | PCI_PRODUCT_VIRTIO_VMMCI65535, 1, NULL((void *)0))) { |
| 736 | log_warnx("%s: can't add PCI vmm control device", |
| 737 | __progname); |
| 738 | return; |
| 739 | } |
| 740 | |
| 741 | if (pci_add_bar(id, PCI_MAPREG_TYPE_IO0x00000001, vmmci_io, NULL((void *)0))) { |
| 742 | log_warnx("%s: can't add bar for vmm control device", |
| 743 | __progname); |
| 744 | return; |
| 745 | } |
| 746 | |
| 747 | memset(&vmmci, 0, sizeof(vmmci)); |
| 748 | vmmci.cfg.device_feature = VMMCI_F_TIMESYNC(1<<0) | VMMCI_F_ACK(1<<1) | |
| 749 | VMMCI_F_SYNCRTC(1<<2); |
| 750 | vmmci.vm_id = vcp->vcp_id; |
| 751 | vmmci.irq = pci_get_dev_irq(id); |
| 752 | vmmci.pci_id = id; |
| 753 | |
| 754 | evtimer_set(&vmmci.timeout, vmmci_timeout, NULL)event_set(&vmmci.timeout, -1, 0, vmmci_timeout, ((void *) 0)); |
| 755 | } |
| 756 | |
| 757 | /* |
| 758 | * vionet_set_hostmac |
| 759 | * |
| 760 | * Sets the hardware address for the host-side tap(4) on a vionet_dev. |
| 761 | * |
| 762 | * This should only be called from the event-loop thread |
| 763 | * |
| 764 | * vm: pointer to the current vmd_vm instance |
| 765 | * idx: index into the array of vionet_dev's for the target vionet_dev |
| 766 | * addr: ethernet address to set |
| 767 | */ |
| 768 | void |
| 769 | vionet_set_hostmac(struct vmd_vm *vm, unsigned int idx, uint8_t *addr) |
| 770 | { |
| 771 | struct vmop_create_params *vmc = &vm->vm_params; |
| 772 | struct virtio_dev *dev; |
| 773 | struct vionet_dev *vionet = NULL((void *)0); |
| 774 | int ret; |
| 775 | |
| 776 | if (idx > vmc->vmc_nnics) |
| 777 | fatalx("%s: invalid vionet index: %u", __func__, idx); |
| 778 | |
| 779 | SLIST_FOREACH(dev, &virtio_devs, dev_next)for((dev) = ((&virtio_devs)->slh_first); (dev) != ((void *)0); (dev) = ((dev)->dev_next.sle_next)) { |
| 780 | if (dev->dev_type == VMD_DEVTYPE_NET'n' |
| 781 | && dev->vionet.idx == idx) { |
| 782 | vionet = &dev->vionet; |
| 783 | break; |
| 784 | } |
| 785 | } |
| 786 | if (vionet == NULL((void *)0)) |
| 787 | fatalx("%s: dev == NULL, idx = %u", __func__, idx); |
| 788 | |
| 789 | /* Set the local vm process copy. */ |
| 790 | memcpy(vionet->hostmac, addr, sizeof(vionet->hostmac)); |
| 791 | |
| 792 | /* Send the information to the device process. */ |
| 793 | ret = imsg_compose_event(&dev->async_iev, IMSG_DEVOP_HOSTMAC, 0, 0, -1, |
| 794 | vionet->hostmac, sizeof(vionet->hostmac)); |
| 795 | if (ret == -1) { |
| 796 | log_warnx("%s: failed to queue hostmac to vionet dev %u", |
| 797 | __func__, idx); |
| 798 | return; |
| 799 | } |
| 800 | } |
| 801 | |
| 802 | void |
| 803 | virtio_shutdown(struct vmd_vm *vm) |
| 804 | { |
| 805 | int ret, status; |
| 806 | pid_t pid = 0; |
| 807 | struct virtio_dev *dev, *tmp; |
| 808 | struct viodev_msg msg; |
| 809 | struct imsgbuf *ibuf; |
| 810 | |
| 811 | /* Ensure that our disks are synced. */ |
| 812 | if (vioscsi != NULL((void *)0)) |
| 813 | vioscsi->file.close(vioscsi->file.p, 0); |
| 814 | |
| 815 | /* |
| 816 | * Broadcast shutdown to child devices. We need to do this |
| 817 | * synchronously as we have already stopped the async event thread. |
| 818 | */ |
| 819 | SLIST_FOREACH(dev, &virtio_devs, dev_next)for((dev) = ((&virtio_devs)->slh_first); (dev) != ((void *)0); (dev) = ((dev)->dev_next.sle_next)) { |
| 820 | memset(&msg, 0, sizeof(msg)); |
| 821 | msg.type = VIODEV_MSG_SHUTDOWN7; |
| 822 | ibuf = &dev->sync_iev.ibuf; |
| 823 | ret = imsg_compose(ibuf, VIODEV_MSG_SHUTDOWN7, 0, 0, -1, |
| 824 | &msg, sizeof(msg)); |
| 825 | if (ret == -1) |
| 826 | fatalx("%s: failed to send shutdown to device", |
| 827 | __func__); |
| 828 | if (imsg_flush(ibuf) == -1) |
| 829 | fatalx("%s: imsg_flush", __func__); |
| 830 | } |
| 831 | |
| 832 | /* |
| 833 | * Wait for all children to shutdown using a simple approach of |
| 834 | * iterating over known child devices and waiting for them to die. |
| 835 | */ |
| 836 | SLIST_FOREACH_SAFE(dev, &virtio_devs, dev_next, tmp)for ((dev) = ((&virtio_devs)->slh_first); (dev) && ((tmp) = ((dev)->dev_next.sle_next), 1); (dev) = (tmp)) { |
| 837 | log_debug("%s: waiting on device pid %d", __func__, |
| 838 | dev->dev_pid); |
| 839 | do { |
| 840 | pid = waitpid(dev->dev_pid, &status, WNOHANG0x01); |
| 841 | } while (pid == 0 || (pid == -1 && errno(*__errno()) == EINTR4)); |
| 842 | if (pid == dev->dev_pid) |
| 843 | log_debug("%s: device for pid %d is stopped", |
| 844 | __func__, pid); |
| 845 | else |
| 846 | log_warnx("%s: unexpected pid %d", __func__, pid); |
| 847 | free(dev); |
| 848 | } |
| 849 | } |
| 850 | |
| 851 | int |
| 852 | vmmci_restore(int fd, uint32_t vm_id) |
| 853 | { |
| 854 | log_debug("%s: receiving vmmci", __func__); |
| 855 | if (atomicio(read, fd, &vmmci, sizeof(vmmci)) != sizeof(vmmci)) { |
| 856 | log_warnx("%s: error reading vmmci from fd", __func__); |
| 857 | return (-1); |
| 858 | } |
| 859 | |
| 860 | if (pci_set_bar_fn(vmmci.pci_id, 0, vmmci_io, NULL((void *)0))) { |
| 861 | log_warnx("%s: can't set bar fn for vmm control device", |
| 862 | __progname); |
| 863 | return (-1); |
| 864 | } |
| 865 | vmmci.vm_id = vm_id; |
| 866 | vmmci.irq = pci_get_dev_irq(vmmci.pci_id); |
| 867 | memset(&vmmci.timeout, 0, sizeof(struct event)); |
| 868 | evtimer_set(&vmmci.timeout, vmmci_timeout, NULL)event_set(&vmmci.timeout, -1, 0, vmmci_timeout, ((void *) 0)); |
| 869 | return (0); |
| 870 | } |
| 871 | |
| 872 | int |
| 873 | viornd_restore(int fd, struct vmd_vm *vm) |
| 874 | { |
| 875 | void *hva = NULL((void *)0); |
| 876 | |
| 877 | log_debug("%s: receiving viornd", __func__); |
| 878 | if (atomicio(read, fd, &viornd, sizeof(viornd)) != sizeof(viornd)) { |
| 879 | log_warnx("%s: error reading viornd from fd", __func__); |
| 880 | return (-1); |
| 881 | } |
| 882 | if (pci_set_bar_fn(viornd.pci_id, 0, virtio_rnd_io, NULL((void *)0))) { |
| 883 | log_warnx("%s: can't set bar fn for virtio rng device", |
| 884 | __progname); |
| 885 | return (-1); |
| 886 | } |
| 887 | viornd.vm_id = vm->vm_params.vmc_params.vcp_id; |
| 888 | viornd.irq = pci_get_dev_irq(viornd.pci_id); |
| 889 | |
| 890 | hva = hvaddr_mem(viornd.vq[0].q_gpa, vring_size(VIORND_QUEUE_SIZE64)); |
| 891 | if (hva == NULL((void *)0)) |
| 892 | fatal("failed to restore viornd virtqueue"); |
| 893 | viornd.vq[0].q_hva = hva; |
| 894 | |
| 895 | return (0); |
| 896 | } |
| 897 | |
| 898 | int |
| 899 | vionet_restore(int fd, struct vmd_vm *vm, int *child_taps) |
| 900 | { |
| 901 | struct vmop_create_params *vmc = &vm->vm_params; |
| 902 | struct vm_create_params *vcp = &vmc->vmc_params; |
| 903 | struct virtio_dev *dev; |
| 904 | uint8_t i; |
| 905 | |
| 906 | if (vmc->vmc_nnics == 0) |
| 907 | return (0); |
| 908 | |
| 909 | for (i = 0; i < vmc->vmc_nnics; i++) { |
| 910 | dev = calloc(1, sizeof(struct virtio_dev)); |
| 911 | if (dev == NULL((void *)0)) { |
| 912 | log_warn("%s: calloc failure allocating vionet", |
| 913 | __progname); |
| 914 | return (-1); |
| 915 | } |
| 916 | |
| 917 | log_debug("%s: receiving virtio network device", __func__); |
| 918 | if (atomicio(read, fd, dev, sizeof(struct virtio_dev)) |
| 919 | != sizeof(struct virtio_dev)) { |
| 920 | log_warnx("%s: error reading vionet from fd", |
| 921 | __func__); |
| 922 | return (-1); |
| 923 | } |
| 924 | |
| 925 | /* Virtio network */ |
| 926 | if (dev->dev_type != VMD_DEVTYPE_NET'n') { |
| 927 | log_warnx("%s: invalid device type", __func__); |
| 928 | return (-1); |
| 929 | } |
| 930 | |
| 931 | dev->sync_fd = -1; |
| 932 | dev->async_fd = -1; |
| 933 | dev->vm_id = vcp->vcp_id; |
| 934 | dev->vm_vmid = vm->vm_vmid; |
| 935 | dev->irq = pci_get_dev_irq(dev->pci_id); |
| 936 | |
| 937 | if (pci_set_bar_fn(dev->pci_id, 0, virtio_pci_io, dev)) { |
| 938 | log_warnx("%s: can't set bar fn for virtio net " |
| 939 | "device", __progname); |
| 940 | return (-1); |
| 941 | } |
| 942 | |
| 943 | dev->vionet.data_fd = child_taps[i]; |
| 944 | dev->vionet.idx = i; |
| 945 | |
| 946 | SLIST_INSERT_HEAD(&virtio_devs, dev, dev_next)do { (dev)->dev_next.sle_next = (&virtio_devs)->slh_first ; (&virtio_devs)->slh_first = (dev); } while (0); |
| 947 | } |
| 948 | |
| 949 | return (0); |
| 950 | } |
| 951 | |
| 952 | int |
| 953 | vioblk_restore(int fd, struct vmd_vm *vm, |
| 954 | int child_disks[][VM_MAX_BASE_PER_DISK4]) |
| 955 | { |
| 956 | struct vmop_create_params *vmc = &vm->vm_params; |
| 957 | struct virtio_dev *dev; |
| 958 | uint8_t i, j; |
| 959 | |
| 960 | if (vmc->vmc_ndisks == 0) |
| 961 | return (0); |
| 962 | |
| 963 | for (i = 0; i < vmc->vmc_ndisks; i++) { |
| 964 | dev = calloc(1, sizeof(struct virtio_dev)); |
| 965 | if (dev == NULL((void *)0)) { |
| 966 | log_warn("%s: calloc failure allocating vioblks", |
| 967 | __progname); |
| 968 | return (-1); |
| 969 | } |
| 970 | |
| 971 | log_debug("%s: receiving vioblk", __func__); |
| 972 | if (atomicio(read, fd, dev, sizeof(struct virtio_dev)) |
| 973 | != sizeof(struct virtio_dev)) { |
| 974 | log_warnx("%s: error reading vioblk from fd", __func__); |
| 975 | return (-1); |
| 976 | } |
| 977 | if (dev->dev_type != VMD_DEVTYPE_DISK'd') { |
| 978 | log_warnx("%s: invalid device type", __func__); |
| 979 | return (-1); |
| 980 | } |
| 981 | |
| 982 | dev->sync_fd = -1; |
| 983 | dev->async_fd = -1; |
| 984 | |
| 985 | if (pci_set_bar_fn(dev->pci_id, 0, virtio_pci_io, dev)) { |
| 986 | log_warnx("%s: can't set bar fn for virtio block " |
| 987 | "device", __progname); |
| 988 | return (-1); |
| 989 | } |
| 990 | dev->vm_id = vmc->vmc_params.vcp_id; |
| 991 | dev->irq = pci_get_dev_irq(dev->pci_id); |
| 992 | |
| 993 | memset(&dev->vioblk.disk_fd, -1, sizeof(dev->vioblk.disk_fd)); |
| 994 | dev->vioblk.ndisk_fd = vmc->vmc_diskbases[i]; |
| 995 | for (j = 0; j < dev->vioblk.ndisk_fd; j++) |
| 996 | dev->vioblk.disk_fd[j] = child_disks[i][j]; |
| 997 | |
| 998 | dev->vioblk.idx = i; |
| 999 | SLIST_INSERT_HEAD(&virtio_devs, dev, dev_next)do { (dev)->dev_next.sle_next = (&virtio_devs)->slh_first ; (&virtio_devs)->slh_first = (dev); } while (0); |
| 1000 | } |
| 1001 | return (0); |
| 1002 | } |
| 1003 | |
| 1004 | int |
| 1005 | vioscsi_restore(int fd, struct vmd_vm *vm, int child_cdrom) |
| 1006 | { |
| 1007 | void *hva = NULL((void *)0); |
| 1008 | unsigned int i; |
| 1009 | |
| 1010 | if (!strlen(vm->vm_params.vmc_cdrom)) |
| 1011 | return (0); |
| 1012 | |
| 1013 | vioscsi = calloc(1, sizeof(struct vioscsi_dev)); |
| 1014 | if (vioscsi == NULL((void *)0)) { |
| 1015 | log_warn("%s: calloc failure allocating vioscsi", __progname); |
| 1016 | return (-1); |
| 1017 | } |
| 1018 | |
| 1019 | log_debug("%s: receiving vioscsi", __func__); |
| 1020 | |
| 1021 | if (atomicio(read, fd, vioscsi, sizeof(struct vioscsi_dev)) != |
| 1022 | sizeof(struct vioscsi_dev)) { |
| 1023 | log_warnx("%s: error reading vioscsi from fd", __func__); |
| 1024 | return (-1); |
| 1025 | } |
| 1026 | |
| 1027 | if (pci_set_bar_fn(vioscsi->pci_id, 0, vioscsi_io, vioscsi)) { |
| 1028 | log_warnx("%s: can't set bar fn for vmm control device", |
| 1029 | __progname); |
| 1030 | return (-1); |
| 1031 | } |
| 1032 | |
| 1033 | vioscsi->vm_id = vm->vm_params.vmc_params.vcp_id; |
| 1034 | vioscsi->irq = pci_get_dev_irq(vioscsi->pci_id); |
| 1035 | |
| 1036 | /* vioscsi uses 3 virtqueues. */ |
| 1037 | for (i = 0; i < 3; i++) { |
| 1038 | hva = hvaddr_mem(vioscsi->vq[i].q_gpa, |
| 1039 | vring_size(VIOSCSI_QUEUE_SIZE128)); |
| 1040 | if (hva == NULL((void *)0)) |
| 1041 | fatal("failed to restore vioscsi virtqueue"); |
| 1042 | vioscsi->vq[i].q_hva = hva; |
| 1043 | } |
| 1044 | |
| 1045 | return (0); |
| 1046 | } |
| 1047 | |
| 1048 | int |
| 1049 | virtio_restore(int fd, struct vmd_vm *vm, int child_cdrom, |
| 1050 | int child_disks[][VM_MAX_BASE_PER_DISK4], int *child_taps) |
| 1051 | { |
| 1052 | struct virtio_dev *dev; |
| 1053 | int ret; |
| 1054 | |
| 1055 | SLIST_INIT(&virtio_devs){ ((&virtio_devs)->slh_first) = ((void *)0); }; |
| 1056 | |
| 1057 | if ((ret = viornd_restore(fd, vm)) == -1) |
| 1058 | return (ret); |
| 1059 | |
| 1060 | if ((ret = vioblk_restore(fd, vm, child_disks)) == -1) |
| 1061 | return (ret); |
| 1062 | |
| 1063 | if ((ret = vioscsi_restore(fd, vm, child_cdrom)) == -1) |
| 1064 | return (ret); |
| 1065 | |
| 1066 | if ((ret = vionet_restore(fd, vm, child_taps)) == -1) |
| 1067 | return (ret); |
| 1068 | |
| 1069 | if ((ret = vmmci_restore(fd, vm->vm_params.vmc_params.vcp_id)) == -1) |
| 1070 | return (ret); |
| 1071 | |
| 1072 | SLIST_FOREACH(dev, &virtio_devs, dev_next)for((dev) = ((&virtio_devs)->slh_first); (dev) != ((void *)0); (dev) = ((dev)->dev_next.sle_next)) { |
| 1073 | if (virtio_dev_launch(vm, dev) != 0) |
| 1074 | fatalx("%s: failed to restore virtio dev", __func__); |
| 1075 | } |
| 1076 | |
| 1077 | return (0); |
| 1078 | } |
| 1079 | |
| 1080 | int |
| 1081 | viornd_dump(int fd) |
| 1082 | { |
| 1083 | log_debug("%s: sending viornd", __func__); |
| 1084 | |
| 1085 | viornd.vq[0].q_hva = NULL((void *)0); |
| 1086 | |
| 1087 | if (atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, fd, &viornd, sizeof(viornd)) != sizeof(viornd)) { |
| 1088 | log_warnx("%s: error writing viornd to fd", __func__); |
| 1089 | return (-1); |
| 1090 | } |
| 1091 | return (0); |
| 1092 | } |
| 1093 | |
| 1094 | int |
| 1095 | vmmci_dump(int fd) |
| 1096 | { |
| 1097 | log_debug("%s: sending vmmci", __func__); |
| 1098 | |
| 1099 | if (atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, fd, &vmmci, sizeof(vmmci)) != sizeof(vmmci)) { |
| 1100 | log_warnx("%s: error writing vmmci to fd", __func__); |
| 1101 | return (-1); |
| 1102 | } |
| 1103 | return (0); |
| 1104 | } |
| 1105 | |
| 1106 | int |
| 1107 | vionet_dump(int fd) |
| 1108 | { |
| 1109 | struct virtio_dev *dev, temp; |
| 1110 | struct viodev_msg msg; |
| 1111 | struct imsg imsg; |
| 1112 | struct imsgbuf *ibuf = NULL((void *)0); |
| 1113 | size_t sz; |
| 1114 | int ret; |
| 1115 | |
| 1116 | log_debug("%s: dumping vionet", __func__); |
| 1117 | |
| 1118 | SLIST_FOREACH(dev, &virtio_devs, dev_next)for((dev) = ((&virtio_devs)->slh_first); (dev) != ((void *)0); (dev) = ((dev)->dev_next.sle_next)) { |
| 1119 | if (dev->dev_type != VMD_DEVTYPE_NET'n') |
| 1120 | continue; |
| 1121 | |
| 1122 | memset(&msg, 0, sizeof(msg)); |
| 1123 | memset(&imsg, 0, sizeof(imsg)); |
| 1124 | |
| 1125 | ibuf = &dev->sync_iev.ibuf; |
| 1126 | msg.type = VIODEV_MSG_DUMP6; |
| 1127 | |
| 1128 | ret = imsg_compose(ibuf, IMSG_DEVOP_MSG, 0, 0, -1, &msg, |
| 1129 | sizeof(msg)); |
| 1130 | if (ret == -1) { |
| 1131 | log_warnx("%s: failed requesting dump of vionet[%d]", |
| 1132 | __func__, dev->vionet.idx); |
| 1133 | return (-1); |
| 1134 | } |
| 1135 | if (imsg_flush(ibuf) == -1) { |
| 1136 | log_warnx("%s: imsg_flush", __func__); |
| 1137 | return (-1); |
| 1138 | } |
| 1139 | |
| 1140 | sz = atomicio(read, dev->sync_fd, &temp, sizeof(temp)); |
| 1141 | if (sz != sizeof(temp)) { |
| 1142 | log_warnx("%s: failed to dump vionet[%d]", __func__, |
| 1143 | dev->vionet.idx); |
| 1144 | return (-1); |
| 1145 | } |
| 1146 | |
| 1147 | /* Clear volatile state. Will reinitialize on restore. */ |
| 1148 | temp.vionet.vq[RXQ0].q_hva = NULL((void *)0); |
| 1149 | temp.vionet.vq[TXQ1].q_hva = NULL((void *)0); |
| 1150 | temp.async_fd = -1; |
| 1151 | temp.sync_fd = -1; |
| 1152 | memset(&temp.async_iev, 0, sizeof(temp.async_iev)); |
| 1153 | memset(&temp.sync_iev, 0, sizeof(temp.sync_iev)); |
| 1154 | |
| 1155 | if (atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, fd, &temp, sizeof(temp)) != sizeof(temp)) { |
| 1156 | log_warnx("%s: error writing vionet to fd", __func__); |
| 1157 | return (-1); |
| 1158 | } |
| 1159 | } |
| 1160 | |
| 1161 | return (0); |
| 1162 | } |
| 1163 | |
| 1164 | int |
| 1165 | vioblk_dump(int fd) |
| 1166 | { |
| 1167 | struct virtio_dev *dev, temp; |
| 1168 | struct viodev_msg msg; |
| 1169 | struct imsg imsg; |
| 1170 | struct imsgbuf *ibuf = NULL((void *)0); |
| 1171 | size_t sz; |
| 1172 | int ret; |
| 1173 | |
| 1174 | log_debug("%s: dumping vioblk", __func__); |
| 1175 | |
| 1176 | SLIST_FOREACH(dev, &virtio_devs, dev_next)for((dev) = ((&virtio_devs)->slh_first); (dev) != ((void *)0); (dev) = ((dev)->dev_next.sle_next)) { |
| 1177 | if (dev->dev_type != VMD_DEVTYPE_DISK'd') |
| 1178 | continue; |
| 1179 | |
| 1180 | memset(&msg, 0, sizeof(msg)); |
| 1181 | memset(&imsg, 0, sizeof(imsg)); |
| 1182 | |
| 1183 | ibuf = &dev->sync_iev.ibuf; |
| 1184 | msg.type = VIODEV_MSG_DUMP6; |
| 1185 | |
| 1186 | ret = imsg_compose(ibuf, IMSG_DEVOP_MSG, 0, 0, -1, &msg, |
| 1187 | sizeof(msg)); |
| 1188 | if (ret == -1) { |
| 1189 | log_warnx("%s: failed requesting dump of vioblk[%d]", |
| 1190 | __func__, dev->vioblk.idx); |
| 1191 | return (-1); |
| 1192 | } |
| 1193 | if (imsg_flush(ibuf) == -1) { |
| 1194 | log_warnx("%s: imsg_flush", __func__); |
| 1195 | return (-1); |
| 1196 | } |
| 1197 | |
| 1198 | |
| 1199 | sz = atomicio(read, dev->sync_fd, &temp, sizeof(temp)); |
| 1200 | if (sz != sizeof(temp)) { |
| 1201 | log_warnx("%s: failed to dump vioblk[%d]", __func__, |
| 1202 | dev->vioblk.idx); |
| 1203 | return (-1); |
| 1204 | } |
| 1205 | |
| 1206 | /* Clear volatile state. Will reinitialize on restore. */ |
| 1207 | temp.vioblk.vq[0].q_hva = NULL((void *)0); |
| 1208 | temp.async_fd = -1; |
| 1209 | temp.sync_fd = -1; |
| 1210 | memset(&temp.async_iev, 0, sizeof(temp.async_iev)); |
| 1211 | memset(&temp.sync_iev, 0, sizeof(temp.sync_iev)); |
| 1212 | |
| 1213 | if (atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, fd, &temp, sizeof(temp)) != sizeof(temp)) { |
| 1214 | log_warnx("%s: error writing vioblk to fd", __func__); |
| 1215 | return (-1); |
| 1216 | } |
| 1217 | } |
| 1218 | |
| 1219 | return (0); |
| 1220 | } |
| 1221 | |
| 1222 | int |
| 1223 | vioscsi_dump(int fd) |
| 1224 | { |
| 1225 | unsigned int i; |
| 1226 | |
| 1227 | if (vioscsi == NULL((void *)0)) |
| 1228 | return (0); |
| 1229 | |
| 1230 | log_debug("%s: sending vioscsi", __func__); |
| 1231 | |
| 1232 | for (i = 0; i < 3; i++) |
| 1233 | vioscsi->vq[i].q_hva = NULL((void *)0); |
| 1234 | |
| 1235 | if (atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, fd, vioscsi, sizeof(struct vioscsi_dev)) != |
| 1236 | sizeof(struct vioscsi_dev)) { |
| 1237 | log_warnx("%s: error writing vioscsi to fd", __func__); |
| 1238 | return (-1); |
| 1239 | } |
| 1240 | return (0); |
| 1241 | } |
| 1242 | |
| 1243 | int |
| 1244 | virtio_dump(int fd) |
| 1245 | { |
| 1246 | int ret; |
| 1247 | |
| 1248 | if ((ret = viornd_dump(fd)) == -1) |
| 1249 | return ret; |
| 1250 | |
| 1251 | if ((ret = vioblk_dump(fd)) == -1) |
| 1252 | return ret; |
| 1253 | |
| 1254 | if ((ret = vioscsi_dump(fd)) == -1) |
| 1255 | return ret; |
| 1256 | |
| 1257 | if ((ret = vionet_dump(fd)) == -1) |
| 1258 | return ret; |
| 1259 | |
| 1260 | if ((ret = vmmci_dump(fd)) == -1) |
| 1261 | return ret; |
| 1262 | |
| 1263 | return (0); |
| 1264 | } |
| 1265 | |
| 1266 | void virtio_broadcast_imsg(struct vmd_vm *vm, uint16_t type, void *data, |
| 1267 | uint16_t datalen) |
| 1268 | { |
| 1269 | struct virtio_dev *dev; |
| 1270 | int ret; |
| 1271 | |
| 1272 | SLIST_FOREACH(dev, &virtio_devs, dev_next)for((dev) = ((&virtio_devs)->slh_first); (dev) != ((void *)0); (dev) = ((dev)->dev_next.sle_next)) { |
| 1273 | ret = imsg_compose_event(&dev->async_iev, type, 0, 0, -1, data, |
| 1274 | datalen); |
| 1275 | if (ret == -1) { |
| 1276 | log_warnx("%s: failed to broadcast imsg type %u", |
| 1277 | __func__, type); |
| 1278 | } |
| 1279 | } |
| 1280 | |
| 1281 | } |
| 1282 | |
| 1283 | void |
| 1284 | virtio_stop(struct vmd_vm *vm) |
| 1285 | { |
| 1286 | return virtio_broadcast_imsg(vm, IMSG_VMDOP_PAUSE_VM, NULL((void *)0), 0); |
| 1287 | } |
| 1288 | |
| 1289 | void |
| 1290 | virtio_start(struct vmd_vm *vm) |
| 1291 | { |
| 1292 | return virtio_broadcast_imsg(vm, IMSG_VMDOP_UNPAUSE_VM, NULL((void *)0), 0); |
| 1293 | } |
| 1294 | |
| 1295 | /* |
| 1296 | * Fork+exec a child virtio device. Returns 0 on success. |
| 1297 | */ |
| 1298 | static int |
| 1299 | virtio_dev_launch(struct vmd_vm *vm, struct virtio_dev *dev) |
| 1300 | { |
| 1301 | char *nargv[12], num[32], vmm_fd[32], vm_name[VM_NAME_MAX64], t[2]; |
| 1302 | pid_t dev_pid; |
| 1303 | int data_fds[VM_MAX_BASE_PER_DISK4], sync_fds[2], async_fds[2], ret = 0; |
| 1304 | size_t i, data_fds_sz, sz = 0; |
| 1305 | struct viodev_msg msg; |
| 1306 | struct imsg imsg; |
| 1307 | struct imsgev *iev = &dev->sync_iev; |
| 1308 | |
| 1309 | switch (dev->dev_type) { |
| 1310 | case VMD_DEVTYPE_NET'n': |
| 1311 | data_fds[0] = dev->vionet.data_fd; |
| 1312 | data_fds_sz = 1; |
| 1313 | log_debug("%s: launching vionet%d", |
| 1314 | vm->vm_params.vmc_params.vcp_name, dev->vionet.idx); |
| 1315 | break; |
| 1316 | case VMD_DEVTYPE_DISK'd': |
| 1317 | memcpy(&data_fds, dev->vioblk.disk_fd, sizeof(data_fds)); |
| 1318 | data_fds_sz = dev->vioblk.ndisk_fd; |
| 1319 | log_debug("%s: launching vioblk%d", |
| 1320 | vm->vm_params.vmc_params.vcp_name, dev->vioblk.idx); |
| 1321 | break; |
| 1322 | /* NOTREACHED */ |
| 1323 | default: |
| 1324 | log_warn("%s: invalid device type", __func__); |
| 1325 | return (EINVAL22); |
| 1326 | } |
| 1327 | |
| 1328 | /* We need two channels: one synchronous (IO reads) and one async. */ |
| 1329 | if (socketpair(AF_UNIX1, SOCK_STREAM1, PF_UNSPEC0, sync_fds) == -1) { |
| 1330 | log_warn("failed to create socketpair"); |
| 1331 | return (errno(*__errno())); |
| 1332 | } |
| 1333 | if (socketpair(AF_UNIX1, SOCK_STREAM1, PF_UNSPEC0, async_fds) == -1) { |
| 1334 | log_warn("failed to create async socketpair"); |
| 1335 | return (errno(*__errno())); |
| 1336 | } |
| 1337 | |
| 1338 | /* Keep communication channels open after exec. */ |
| 1339 | if (fcntl(sync_fds[1], F_SETFD2, 0)) { |
| 1340 | ret = errno(*__errno()); |
| 1341 | log_warn("%s: fcntl", __func__); |
| 1342 | goto err; |
| 1343 | } |
| 1344 | if (fcntl(async_fds[1], F_SETFD2, 0)) { |
| 1345 | ret = errno(*__errno()); |
| 1346 | log_warn("%s: fcnt", __func__); |
| 1347 | goto err; |
| 1348 | } |
| 1349 | |
| 1350 | /* Fork... */ |
| 1351 | dev_pid = fork(); |
| 1352 | if (dev_pid == -1) { |
| 1353 | ret = errno(*__errno()); |
| 1354 | log_warn("%s: fork failed", __func__); |
| 1355 | goto err; |
| 1356 | } |
| 1357 | |
| 1358 | if (dev_pid > 0) { |
| 1359 | /* Parent */ |
| 1360 | close_fd(sync_fds[1]); |
| 1361 | close_fd(async_fds[1]); |
| 1362 | |
| 1363 | /* Save the child's pid to help with cleanup. */ |
| 1364 | dev->dev_pid = dev_pid; |
| 1365 | |
| 1366 | /* Set the channel fds to the child's before sending. */ |
| 1367 | dev->sync_fd = sync_fds[1]; |
| 1368 | dev->async_fd = async_fds[1]; |
| 1369 | |
| 1370 | /* Close data fds. Only the child device needs them now. */ |
| 1371 | for (i = 0; i < data_fds_sz; i++) |
| 1372 | close_fd(data_fds[i]); |
| 1373 | |
| 1374 | /* Set our synchronous channel to non-blocking. */ |
| 1375 | if (fcntl(sync_fds[0], F_SETFL4, O_NONBLOCK0x0004) == -1) { |
| 1376 | ret = errno(*__errno()); |
| 1377 | log_warn("%s: fcntl", __func__); |
| 1378 | goto err; |
| 1379 | } |
| 1380 | |
| 1381 | /* 1. Send over our configured device. */ |
| 1382 | log_debug("%s: sending '%c' type device struct", __func__, |
| 1383 | dev->dev_type); |
| 1384 | sz = atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, sync_fds[0], dev, sizeof(*dev)); |
| 1385 | if (sz != sizeof(*dev)) { |
| 1386 | log_warnx("%s: failed to send device", __func__); |
| 1387 | ret = EIO5; |
| 1388 | goto err; |
| 1389 | } |
| 1390 | |
| 1391 | /* 2. Send over details on the VM (including memory fds). */ |
| 1392 | log_debug("%s: sending vm message for '%s'", __func__, |
| 1393 | vm->vm_params.vmc_params.vcp_name); |
| 1394 | sz = atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, sync_fds[0], vm, sizeof(*vm)); |
| 1395 | if (sz != sizeof(*vm)) { |
| 1396 | log_warnx("%s: failed to send vm details", __func__); |
| 1397 | ret = EIO5; |
| 1398 | goto err; |
| 1399 | } |
| 1400 | |
| 1401 | /* |
| 1402 | * Initialize our imsg channel to the child device. The initial |
| 1403 | * communication will be synchronous. We expect the child to |
| 1404 | * report itself "ready" to confirm the launch was a success. |
| 1405 | */ |
| 1406 | imsg_init(&iev->ibuf, sync_fds[0]); |
| 1407 | do |
| 1408 | ret = imsg_read(&iev->ibuf); |
| 1409 | while (ret == -1 && errno(*__errno()) == EAGAIN35); |
| 1410 | if (ret == 0 || ret == -1) { |
| 1411 | log_warnx("%s: failed to receive ready message from " |
| 1412 | "'%c' type device", __func__, dev->dev_type); |
| 1413 | ret = EIO5; |
| 1414 | goto err; |
| 1415 | } |
| 1416 | ret = 0; |
| 1417 | |
| 1418 | log_debug("%s: receiving reply", __func__); |
| 1419 | if (imsg_get(&iev->ibuf, &imsg) < 1) { |
| 1420 | log_warnx("%s: imsg_get", __func__); |
| 1421 | ret = EIO5; |
| 1422 | goto err; |
| 1423 | } |
| 1424 | IMSG_SIZE_CHECK(&imsg, &msg)do { if (((&imsg)->hdr.len - sizeof(struct imsg_hdr)) < sizeof(*&msg)) fatalx("bad length imsg received (%s)", "&msg" ); } while (0); |
| 1425 | memcpy(&msg, imsg.data, sizeof(msg)); |
| 1426 | imsg_free(&imsg); |
| 1427 | |
| 1428 | if (msg.type != VIODEV_MSG_READY1) { |
| 1429 | log_warnx("%s: expected ready message, got type %d", |
| 1430 | __func__, msg.type); |
| 1431 | ret = EINVAL22; |
| 1432 | goto err; |
| 1433 | } |
| 1434 | log_debug("%s: device reports ready via sync channel", |
| 1435 | __func__); |
| 1436 | |
| 1437 | /* |
| 1438 | * Wire in the async event handling, but after reverting back |
| 1439 | * to the parent's fd's. |
| 1440 | */ |
| 1441 | dev->sync_fd = sync_fds[0]; |
| 1442 | dev->async_fd = async_fds[0]; |
| 1443 | vm_device_pipe(dev, virtio_dispatch_dev); |
| 1444 | } else { |
| 1445 | /* Child */ |
| 1446 | close_fd(async_fds[0]); |
| 1447 | close_fd(sync_fds[0]); |
| 1448 | |
| 1449 | /* Keep data file descriptors open after exec. */ |
| 1450 | for (i = 0; i < data_fds_sz; i++) { |
| 1451 | log_debug("%s: marking fd %d !close-on-exec", __func__, |
| 1452 | data_fds[i]); |
| 1453 | if (fcntl(data_fds[i], F_SETFD2, 0)) { |
| 1454 | ret = errno(*__errno()); |
| 1455 | log_warn("%s: fcntl", __func__); |
| 1456 | goto err; |
| 1457 | } |
| 1458 | } |
| 1459 | |
| 1460 | memset(&nargv, 0, sizeof(nargv)); |
| 1461 | memset(num, 0, sizeof(num)); |
| 1462 | snprintf(num, sizeof(num), "%d", sync_fds[1]); |
| 1463 | memset(vmm_fd, 0, sizeof(vmm_fd)); |
| 1464 | snprintf(vmm_fd, sizeof(vmm_fd), "%d", env->vmd_fd); |
| 1465 | memset(vm_name, 0, sizeof(vm_name)); |
| 1466 | snprintf(vm_name, sizeof(vm_name), "%s", |
| 1467 | vm->vm_params.vmc_params.vcp_name); |
| 1468 | |
| 1469 | t[0] = dev->dev_type; |
| 1470 | t[1] = '\0'; |
| 1471 | |
| 1472 | nargv[0] = env->argv0; |
| 1473 | nargv[1] = "-X"; |
| 1474 | nargv[2] = num; |
| 1475 | nargv[3] = "-t"; |
| 1476 | nargv[4] = t; |
| 1477 | nargv[5] = "-i"; |
| 1478 | nargv[6] = vmm_fd; |
| 1479 | nargv[7] = "-p"; |
| 1480 | nargv[8] = vm_name; |
| 1481 | nargv[9] = "-n"; |
| 1482 | nargv[10] = NULL((void *)0); |
| 1483 | |
| 1484 | if (env->vmd_verbose == 1) { |
| 1485 | nargv[10] = VMD_VERBOSE_1"-v";; |
| 1486 | nargv[11] = NULL((void *)0); |
| 1487 | } else if (env->vmd_verbose > 1) { |
| 1488 | nargv[10] = VMD_VERBOSE_2"-vv";; |
| 1489 | nargv[11] = NULL((void *)0); |
| 1490 | } |
| 1491 | |
| 1492 | /* Control resumes in vmd.c:main(). */ |
| 1493 | execvp(nargv[0], nargv); |
| 1494 | |
| 1495 | ret = errno(*__errno()); |
| 1496 | log_warn("%s: failed to exec device", __func__); |
| 1497 | _exit(ret); |
| 1498 | /* NOTREACHED */ |
| 1499 | } |
| 1500 | |
| 1501 | return (ret); |
| 1502 | |
| 1503 | err: |
| 1504 | close_fd(sync_fds[0]); |
| 1505 | close_fd(sync_fds[1]); |
| 1506 | close_fd(async_fds[0]); |
| 1507 | close_fd(async_fds[1]); |
| 1508 | return (ret); |
| 1509 | } |
| 1510 | |
| 1511 | /* |
| 1512 | * Initialize an async imsg channel for a virtio device. |
| 1513 | */ |
| 1514 | int |
| 1515 | vm_device_pipe(struct virtio_dev *dev, void (*cb)(int, short, void *)) |
| 1516 | { |
| 1517 | struct imsgev *iev = &dev->async_iev; |
| 1518 | int fd = dev->async_fd; |
| 1519 | |
| 1520 | log_debug("%s: initializing '%c' device pipe (fd=%d)", __func__, |
| 1521 | dev->dev_type, fd); |
| 1522 | |
| 1523 | if (fcntl(fd, F_SETFL4, O_NONBLOCK0x0004) == -1) { |
| 1524 | log_warn("failed to set nonblocking mode on vm device pipe"); |
| 1525 | return (-1); |
| 1526 | } |
| 1527 | |
| 1528 | imsg_init(&iev->ibuf, fd); |
| 1529 | iev->handler = cb; |
| 1530 | iev->data = dev; |
| 1531 | iev->events = EV_READ0x02; |
| 1532 | imsg_event_add(iev); |
| 1533 | |
| 1534 | return (0); |
| 1535 | } |
| 1536 | |
| 1537 | void |
| 1538 | virtio_dispatch_dev(int fd, short event, void *arg) |
| 1539 | { |
| 1540 | struct virtio_dev *dev = (struct virtio_dev*)arg; |
| 1541 | struct imsgev *iev = &dev->async_iev; |
| 1542 | struct imsgbuf *ibuf = &iev->ibuf; |
| 1543 | struct imsg imsg; |
| 1544 | struct viodev_msg msg; |
| 1545 | ssize_t n = 0; |
| 1546 | |
| 1547 | if (event & EV_READ0x02) { |
| 1548 | if ((n = imsg_read(ibuf)) == -1 && errno(*__errno()) != EAGAIN35) |
| 1549 | fatal("%s: imsg_read", __func__); |
| 1550 | if (n == 0) { |
| 1551 | /* this pipe is dead, so remove the event handler */ |
| 1552 | log_debug("%s: pipe dead (EV_READ)", __func__); |
| 1553 | event_del(&iev->ev); |
| 1554 | event_loopexit(NULL((void *)0)); |
| 1555 | return; |
| 1556 | } |
| 1557 | } |
| 1558 | |
| 1559 | if (event & EV_WRITE0x04) { |
| 1560 | if ((n = msgbuf_write(&ibuf->w)) == -1 && errno(*__errno()) != EAGAIN35) |
| 1561 | fatal("%s: msgbuf_write", __func__); |
| 1562 | if (n == 0) { |
| 1563 | /* this pipe is dead, so remove the event handler */ |
| 1564 | log_debug("%s: pipe dead (EV_WRITE)", __func__); |
| 1565 | event_del(&iev->ev); |
| 1566 | event_loopexit(NULL((void *)0)); |
| 1567 | return; |
| 1568 | } |
| 1569 | } |
| 1570 | |
| 1571 | for (;;) { |
| 1572 | if ((n = imsg_get(ibuf, &imsg)) == -1) |
| 1573 | fatal("%s: imsg_get", __func__); |
| 1574 | if (n == 0) |
| 1575 | break; |
| 1576 | |
| 1577 | switch (imsg.hdr.type) { |
| 1578 | case IMSG_DEVOP_MSG: |
| 1579 | IMSG_SIZE_CHECK(&imsg, &msg)do { if (((&imsg)->hdr.len - sizeof(struct imsg_hdr)) < sizeof(*&msg)) fatalx("bad length imsg received (%s)", "&msg" ); } while (0); |
| 1580 | memcpy(&msg, imsg.data, sizeof(msg)); |
| 1581 | handle_dev_msg(&msg, dev); |
| 1582 | break; |
| 1583 | default: |
| 1584 | log_warnx("%s: got non devop imsg %d", __func__, |
| 1585 | imsg.hdr.type); |
| 1586 | break; |
| 1587 | } |
| 1588 | imsg_free(&imsg); |
| 1589 | } |
| 1590 | imsg_event_add(iev); |
| 1591 | } |
| 1592 | |
| 1593 | |
| 1594 | static int |
| 1595 | handle_dev_msg(struct viodev_msg *msg, struct virtio_dev *gdev) |
| 1596 | { |
| 1597 | uint32_t vm_id = gdev->vm_id; |
| 1598 | int irq = gdev->irq; |
| 1599 | |
| 1600 | switch (msg->type) { |
| 1601 | case VIODEV_MSG_KICK3: |
| 1602 | if (msg->state == INTR_STATE_ASSERT1) |
| 1603 | vcpu_assert_pic_irq(vm_id, msg->vcpu, irq); |
| 1604 | else if (msg->state == INTR_STATE_DEASSERT-1) |
| 1605 | vcpu_deassert_pic_irq(vm_id, msg->vcpu, irq); |
| 1606 | break; |
| 1607 | case VIODEV_MSG_READY1: |
| 1608 | log_debug("%s: device reports ready", __func__); |
| 1609 | break; |
| 1610 | case VIODEV_MSG_ERROR2: |
| 1611 | log_warnx("%s: device reported error", __func__); |
| 1612 | break; |
| 1613 | case VIODEV_MSG_INVALID0: |
| 1614 | case VIODEV_MSG_IO_READ4: |
| 1615 | case VIODEV_MSG_IO_WRITE5: |
| 1616 | /* FALLTHROUGH */ |
| 1617 | default: |
| 1618 | log_warnx("%s: unsupported device message type %d", __func__, |
| 1619 | msg->type); |
| 1620 | return (1); |
| 1621 | } |
| 1622 | |
| 1623 | return (0); |
| 1624 | }; |
| 1625 | |
| 1626 | /* |
| 1627 | * Called by the VM process while processing IO from the VCPU thread. |
| 1628 | * |
| 1629 | * N.b. Since the VCPU thread calls this function, we cannot mutate the event |
| 1630 | * system. All ipc messages must be sent manually and cannot be queued for |
| 1631 | * the event loop to push them. (We need to perform a synchronous read, so |
| 1632 | * this isn't really a big deal.) |
| 1633 | */ |
| 1634 | int |
| 1635 | virtio_pci_io(int dir, uint16_t reg, uint32_t *data, uint8_t *intr, |
| 1636 | void *cookie, uint8_t sz) |
| 1637 | { |
| 1638 | struct virtio_dev *dev = (struct virtio_dev *)cookie; |
| 1639 | struct imsgbuf *ibuf = &dev->sync_iev.ibuf; |
| 1640 | struct imsg imsg; |
| 1641 | struct viodev_msg msg; |
| 1642 | ssize_t n; |
| 1643 | int ret = 0; |
| 1644 | |
| 1645 | memset(&msg, 0, sizeof(msg)); |
| 1646 | msg.reg = reg; |
| 1647 | msg.io_sz = sz; |
| 1648 | |
| 1649 | if (dir == 0) { |
| 1650 | msg.type = VIODEV_MSG_IO_WRITE5; |
| 1651 | msg.data = *data; |
| 1652 | msg.data_valid = 1; |
| 1653 | } else |
| 1654 | msg.type = VIODEV_MSG_IO_READ4; |
| 1655 | |
| 1656 | if (msg.type == VIODEV_MSG_IO_WRITE5) { |
| 1657 | /* |
| 1658 | * Write request. No reply expected. |
| 1659 | */ |
| 1660 | ret = imsg_compose(ibuf, IMSG_DEVOP_MSG, 0, 0, -1, &msg, |
| 1661 | sizeof(msg)); |
| 1662 | if (ret == -1) { |
| 1663 | log_warn("%s: failed to send async io event to virtio" |
| 1664 | " device", __func__); |
| 1665 | return (ret); |
| 1666 | } |
| 1667 | if (imsg_flush(ibuf) == -1) { |
| 1668 | log_warnx("%s: imsg_flush (write)", __func__); |
| 1669 | return (-1); |
| 1670 | } |
| 1671 | } else { |
| 1672 | /* |
| 1673 | * Read request. Requires waiting for a reply. |
| 1674 | */ |
| 1675 | ret = imsg_compose(ibuf, IMSG_DEVOP_MSG, 0, 0, -1, &msg, |
| 1676 | sizeof(msg)); |
| 1677 | if (ret == -1) { |
| 1678 | log_warnx("%s: failed to send sync io event to virtio" |
| 1679 | " device", __func__); |
| 1680 | return (ret); |
| 1681 | } |
| 1682 | if (imsg_flush(ibuf) == -1) { |
| 1683 | log_warnx("%s: imsg_flush (read)", __func__); |
| 1684 | return (-1); |
| 1685 | } |
| 1686 | |
| 1687 | /* Read our reply. */ |
| 1688 | do |
| 1689 | n = imsg_read(ibuf); |
| 1690 | while (n == -1 && errno(*__errno()) == EAGAIN35); |
| 1691 | if (n == 0 || n == -1) { |
| 1692 | log_warn("%s: imsg_read (n=%ld)", __func__, n); |
| 1693 | return (-1); |
| 1694 | } |
| 1695 | if ((n = imsg_get(ibuf, &imsg)) == -1) { |
| 1696 | log_warn("%s: imsg_get (n=%ld)", __func__, n); |
| 1697 | return (-1); |
| 1698 | } |
| 1699 | if (n == 0) { |
| 1700 | log_warnx("%s: invalid imsg", __func__); |
| 1701 | return (-1); |
| 1702 | } |
| 1703 | |
| 1704 | IMSG_SIZE_CHECK(&imsg, &msg)do { if (((&imsg)->hdr.len - sizeof(struct imsg_hdr)) < sizeof(*&msg)) fatalx("bad length imsg received (%s)", "&msg" ); } while (0); |
| 1705 | memcpy(&msg, imsg.data, sizeof(msg)); |
| 1706 | imsg_free(&imsg); |
| 1707 | |
| 1708 | if (msg.type == VIODEV_MSG_IO_READ4 && msg.data_valid) { |
| 1709 | #if DEBUG |
| 1710 | log_debug("%s: got sync read response (reg=%s)", |
| 1711 | __func__, virtio_reg_name(msg.reg)); |
| 1712 | #endif /* DEBUG */ |
| 1713 | *data = msg.data; |
| 1714 | /* |
| 1715 | * It's possible we're asked to {de,}assert after the |
| 1716 | * device performs a register read. |
| 1717 | */ |
| 1718 | if (msg.state == INTR_STATE_ASSERT1) |
| 1719 | vcpu_assert_pic_irq(dev->vm_id, msg.vcpu, msg.irq); |
| 1720 | else if (msg.state == INTR_STATE_DEASSERT-1) |
| 1721 | vcpu_deassert_pic_irq(dev->vm_id, msg.vcpu, msg.irq); |
| 1722 | } else { |
| 1723 | log_warnx("%s: expected IO_READ, got %d", __func__, |
| 1724 | msg.type); |
| 1725 | return (-1); |
| 1726 | } |
| 1727 | } |
| 1728 | |
| 1729 | return (0); |
| 1730 | } |
| 1731 | |
| 1732 | void |
| 1733 | virtio_assert_pic_irq(struct virtio_dev *dev, int vcpu) |
| 1734 | { |
| 1735 | struct viodev_msg msg; |
| 1736 | int ret; |
| 1737 | |
| 1738 | memset(&msg, 0, sizeof(msg)); |
| 1739 | msg.irq = dev->irq; |
| 1740 | msg.vcpu = vcpu; |
| 1741 | msg.type = VIODEV_MSG_KICK3; |
| 1742 | msg.state = INTR_STATE_ASSERT1; |
| 1743 | |
| 1744 | ret = imsg_compose_event(&dev->async_iev, IMSG_DEVOP_MSG, 0, 0, -1, |
| 1745 | &msg, sizeof(msg)); |
| 1746 | if (ret == -1) |
| 1747 | log_warnx("%s: failed to assert irq %d", __func__, dev->irq); |
| 1748 | } |
| 1749 | |
| 1750 | void |
| 1751 | virtio_deassert_pic_irq(struct virtio_dev *dev, int vcpu) |
| 1752 | { |
| 1753 | struct viodev_msg msg; |
| 1754 | int ret; |
| 1755 | |
| 1756 | memset(&msg, 0, sizeof(msg)); |
| 1757 | msg.irq = dev->irq; |
| 1758 | msg.vcpu = vcpu; |
| 1759 | msg.type = VIODEV_MSG_KICK3; |
| 1760 | msg.state = INTR_STATE_DEASSERT-1; |
| 1761 | |
| 1762 | ret = imsg_compose_event(&dev->async_iev, IMSG_DEVOP_MSG, 0, 0, -1, |
| 1763 | &msg, sizeof(msg)); |
| 1764 | if (ret == -1) |
| 1765 | log_warnx("%s: failed to deassert irq %d", __func__, dev->irq); |
| 1766 | } |