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e72f66a0 SH |
1 | /* |
2 | * Dedicated thread for virtio-blk I/O processing | |
3 | * | |
4 | * Copyright 2012 IBM, Corp. | |
5 | * Copyright 2012 Red Hat, Inc. and/or its affiliates | |
6 | * | |
7 | * Authors: | |
8 | * Stefan Hajnoczi <stefanha@redhat.com> | |
9 | * | |
10 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
11 | * See the COPYING file in the top-level directory. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include "trace.h" | |
16 | #include "qemu/iov.h" | |
e72f66a0 | 17 | #include "qemu/thread.h" |
b4a42f81 | 18 | #include "qemu/error-report.h" |
0d09e41a | 19 | #include "hw/virtio/dataplane/vring.h" |
e72f66a0 SH |
20 | #include "ioq.h" |
21 | #include "migration/migration.h" | |
b4a42f81 | 22 | #include "block/block.h" |
0d09e41a PB |
23 | #include "hw/virtio/virtio-blk.h" |
24 | #include "virtio-blk.h" | |
2c20e711 | 25 | #include "block/aio.h" |
e72f66a0 SH |
26 | |
27 | enum { | |
28 | SEG_MAX = 126, /* maximum number of I/O segments */ | |
29 | VRING_MAX = SEG_MAX + 2, /* maximum number of vring descriptors */ | |
30 | REQ_MAX = VRING_MAX, /* maximum number of requests in the vring, | |
31 | * is VRING_MAX / 2 with traditional and | |
32 | * VRING_MAX with indirect descriptors */ | |
33 | }; | |
34 | ||
35 | typedef struct { | |
36 | struct iocb iocb; /* Linux AIO control block */ | |
37 | QEMUIOVector *inhdr; /* iovecs for virtio_blk_inhdr */ | |
38 | unsigned int head; /* vring descriptor index */ | |
de0161c0 SH |
39 | struct iovec *bounce_iov; /* used if guest buffers are unaligned */ |
40 | QEMUIOVector *read_qiov; /* for read completion /w bounce buffer */ | |
e72f66a0 SH |
41 | } VirtIOBlockRequest; |
42 | ||
43 | struct VirtIOBlockDataPlane { | |
44 | bool started; | |
cd7fdfe5 | 45 | bool stopping; |
e72f66a0 SH |
46 | QEMUBH *start_bh; |
47 | QemuThread thread; | |
48 | ||
49 | VirtIOBlkConf *blk; | |
50 | int fd; /* image file descriptor */ | |
51 | ||
52 | VirtIODevice *vdev; | |
53 | Vring vring; /* virtqueue vring */ | |
54 | EventNotifier *guest_notifier; /* irq */ | |
55 | ||
2c20e711 PB |
56 | /* Note that these EventNotifiers are assigned by value. This is |
57 | * fine as long as you do not call event_notifier_cleanup on them | |
58 | * (because you don't own the file descriptor or handle; you just | |
59 | * use it). | |
60 | */ | |
61 | AioContext *ctx; | |
62 | EventNotifier io_notifier; /* Linux AIO completion */ | |
63 | EventNotifier host_notifier; /* doorbell */ | |
e72f66a0 SH |
64 | |
65 | IOQueue ioqueue; /* Linux AIO queue (should really be per | |
66 | dataplane thread) */ | |
67 | VirtIOBlockRequest requests[REQ_MAX]; /* pool of requests, managed by the | |
68 | queue */ | |
69 | ||
70 | unsigned int num_reqs; | |
71 | ||
72 | Error *migration_blocker; | |
73 | }; | |
74 | ||
75 | /* Raise an interrupt to signal guest, if necessary */ | |
76 | static void notify_guest(VirtIOBlockDataPlane *s) | |
77 | { | |
78 | if (!vring_should_notify(s->vdev, &s->vring)) { | |
79 | return; | |
80 | } | |
81 | ||
82 | event_notifier_set(s->guest_notifier); | |
83 | } | |
84 | ||
85 | static void complete_request(struct iocb *iocb, ssize_t ret, void *opaque) | |
86 | { | |
87 | VirtIOBlockDataPlane *s = opaque; | |
88 | VirtIOBlockRequest *req = container_of(iocb, VirtIOBlockRequest, iocb); | |
89 | struct virtio_blk_inhdr hdr; | |
90 | int len; | |
91 | ||
92 | if (likely(ret >= 0)) { | |
93 | hdr.status = VIRTIO_BLK_S_OK; | |
94 | len = ret; | |
95 | } else { | |
96 | hdr.status = VIRTIO_BLK_S_IOERR; | |
97 | len = 0; | |
98 | } | |
99 | ||
100 | trace_virtio_blk_data_plane_complete_request(s, req->head, ret); | |
101 | ||
de0161c0 SH |
102 | if (req->read_qiov) { |
103 | assert(req->bounce_iov); | |
104 | qemu_iovec_from_buf(req->read_qiov, 0, req->bounce_iov->iov_base, len); | |
105 | qemu_iovec_destroy(req->read_qiov); | |
106 | g_slice_free(QEMUIOVector, req->read_qiov); | |
107 | } | |
108 | ||
109 | if (req->bounce_iov) { | |
110 | qemu_vfree(req->bounce_iov->iov_base); | |
111 | g_slice_free(struct iovec, req->bounce_iov); | |
112 | } | |
113 | ||
e72f66a0 SH |
114 | qemu_iovec_from_buf(req->inhdr, 0, &hdr, sizeof(hdr)); |
115 | qemu_iovec_destroy(req->inhdr); | |
116 | g_slice_free(QEMUIOVector, req->inhdr); | |
117 | ||
118 | /* According to the virtio specification len should be the number of bytes | |
119 | * written to, but for virtio-blk it seems to be the number of bytes | |
120 | * transferred plus the status bytes. | |
121 | */ | |
122 | vring_push(&s->vring, req->head, len + sizeof(hdr)); | |
123 | ||
124 | s->num_reqs--; | |
125 | } | |
126 | ||
127 | static void complete_request_early(VirtIOBlockDataPlane *s, unsigned int head, | |
128 | QEMUIOVector *inhdr, unsigned char status) | |
129 | { | |
130 | struct virtio_blk_inhdr hdr = { | |
131 | .status = status, | |
132 | }; | |
133 | ||
134 | qemu_iovec_from_buf(inhdr, 0, &hdr, sizeof(hdr)); | |
135 | qemu_iovec_destroy(inhdr); | |
136 | g_slice_free(QEMUIOVector, inhdr); | |
137 | ||
138 | vring_push(&s->vring, head, sizeof(hdr)); | |
139 | notify_guest(s); | |
140 | } | |
141 | ||
142 | /* Get disk serial number */ | |
143 | static void do_get_id_cmd(VirtIOBlockDataPlane *s, | |
144 | struct iovec *iov, unsigned int iov_cnt, | |
145 | unsigned int head, QEMUIOVector *inhdr) | |
146 | { | |
147 | char id[VIRTIO_BLK_ID_BYTES]; | |
148 | ||
149 | /* Serial number not NUL-terminated when shorter than buffer */ | |
150 | strncpy(id, s->blk->serial ? s->blk->serial : "", sizeof(id)); | |
151 | iov_from_buf(iov, iov_cnt, 0, id, sizeof(id)); | |
152 | complete_request_early(s, head, inhdr, VIRTIO_BLK_S_OK); | |
153 | } | |
154 | ||
b5ef1aab SH |
155 | static int do_rdwr_cmd(VirtIOBlockDataPlane *s, bool read, |
156 | struct iovec *iov, unsigned int iov_cnt, | |
157 | long long offset, unsigned int head, | |
158 | QEMUIOVector *inhdr) | |
159 | { | |
160 | struct iocb *iocb; | |
de0161c0 SH |
161 | QEMUIOVector qiov; |
162 | struct iovec *bounce_iov = NULL; | |
163 | QEMUIOVector *read_qiov = NULL; | |
164 | ||
165 | qemu_iovec_init_external(&qiov, iov, iov_cnt); | |
166 | if (!bdrv_qiov_is_aligned(s->blk->conf.bs, &qiov)) { | |
167 | void *bounce_buffer = qemu_blockalign(s->blk->conf.bs, qiov.size); | |
168 | ||
169 | if (read) { | |
170 | /* Need to copy back from bounce buffer on completion */ | |
171 | read_qiov = g_slice_new(QEMUIOVector); | |
172 | qemu_iovec_init(read_qiov, iov_cnt); | |
173 | qemu_iovec_concat_iov(read_qiov, iov, iov_cnt, 0, qiov.size); | |
174 | } else { | |
175 | qemu_iovec_to_buf(&qiov, 0, bounce_buffer, qiov.size); | |
176 | } | |
177 | ||
178 | /* Redirect I/O to aligned bounce buffer */ | |
179 | bounce_iov = g_slice_new(struct iovec); | |
180 | bounce_iov->iov_base = bounce_buffer; | |
181 | bounce_iov->iov_len = qiov.size; | |
182 | iov = bounce_iov; | |
183 | iov_cnt = 1; | |
184 | } | |
b5ef1aab SH |
185 | |
186 | iocb = ioq_rdwr(&s->ioqueue, read, iov, iov_cnt, offset); | |
187 | ||
188 | /* Fill in virtio block metadata needed for completion */ | |
189 | VirtIOBlockRequest *req = container_of(iocb, VirtIOBlockRequest, iocb); | |
190 | req->head = head; | |
191 | req->inhdr = inhdr; | |
de0161c0 SH |
192 | req->bounce_iov = bounce_iov; |
193 | req->read_qiov = read_qiov; | |
b5ef1aab SH |
194 | return 0; |
195 | } | |
196 | ||
e72f66a0 SH |
197 | static int process_request(IOQueue *ioq, struct iovec iov[], |
198 | unsigned int out_num, unsigned int in_num, | |
199 | unsigned int head) | |
200 | { | |
201 | VirtIOBlockDataPlane *s = container_of(ioq, VirtIOBlockDataPlane, ioqueue); | |
202 | struct iovec *in_iov = &iov[out_num]; | |
203 | struct virtio_blk_outhdr outhdr; | |
204 | QEMUIOVector *inhdr; | |
205 | size_t in_size; | |
e72f66a0 SH |
206 | |
207 | /* Copy in outhdr */ | |
208 | if (unlikely(iov_to_buf(iov, out_num, 0, &outhdr, | |
209 | sizeof(outhdr)) != sizeof(outhdr))) { | |
210 | error_report("virtio-blk request outhdr too short"); | |
211 | return -EFAULT; | |
212 | } | |
213 | iov_discard_front(&iov, &out_num, sizeof(outhdr)); | |
214 | ||
215 | /* Grab inhdr for later */ | |
216 | in_size = iov_size(in_iov, in_num); | |
217 | if (in_size < sizeof(struct virtio_blk_inhdr)) { | |
218 | error_report("virtio_blk request inhdr too short"); | |
219 | return -EFAULT; | |
220 | } | |
221 | inhdr = g_slice_new(QEMUIOVector); | |
222 | qemu_iovec_init(inhdr, 1); | |
223 | qemu_iovec_concat_iov(inhdr, in_iov, in_num, | |
224 | in_size - sizeof(struct virtio_blk_inhdr), | |
225 | sizeof(struct virtio_blk_inhdr)); | |
226 | iov_discard_back(in_iov, &in_num, sizeof(struct virtio_blk_inhdr)); | |
227 | ||
228 | /* TODO Linux sets the barrier bit even when not advertised! */ | |
229 | outhdr.type &= ~VIRTIO_BLK_T_BARRIER; | |
230 | ||
231 | switch (outhdr.type) { | |
232 | case VIRTIO_BLK_T_IN: | |
b5ef1aab SH |
233 | do_rdwr_cmd(s, true, in_iov, in_num, outhdr.sector * 512, head, inhdr); |
234 | return 0; | |
e72f66a0 SH |
235 | |
236 | case VIRTIO_BLK_T_OUT: | |
b5ef1aab SH |
237 | do_rdwr_cmd(s, false, iov, out_num, outhdr.sector * 512, head, inhdr); |
238 | return 0; | |
e72f66a0 SH |
239 | |
240 | case VIRTIO_BLK_T_SCSI_CMD: | |
241 | /* TODO support SCSI commands */ | |
242 | complete_request_early(s, head, inhdr, VIRTIO_BLK_S_UNSUPP); | |
243 | return 0; | |
244 | ||
245 | case VIRTIO_BLK_T_FLUSH: | |
246 | /* TODO fdsync not supported by Linux AIO, do it synchronously here! */ | |
247 | if (qemu_fdatasync(s->fd) < 0) { | |
248 | complete_request_early(s, head, inhdr, VIRTIO_BLK_S_IOERR); | |
249 | } else { | |
250 | complete_request_early(s, head, inhdr, VIRTIO_BLK_S_OK); | |
251 | } | |
252 | return 0; | |
253 | ||
254 | case VIRTIO_BLK_T_GET_ID: | |
255 | do_get_id_cmd(s, in_iov, in_num, head, inhdr); | |
256 | return 0; | |
257 | ||
258 | default: | |
259 | error_report("virtio-blk unsupported request type %#x", outhdr.type); | |
260 | qemu_iovec_destroy(inhdr); | |
261 | g_slice_free(QEMUIOVector, inhdr); | |
262 | return -EFAULT; | |
263 | } | |
e72f66a0 SH |
264 | } |
265 | ||
485e3ce8 PB |
266 | static int flush_true(EventNotifier *e) |
267 | { | |
268 | return true; | |
269 | } | |
270 | ||
2c20e711 | 271 | static void handle_notify(EventNotifier *e) |
e72f66a0 | 272 | { |
2c20e711 PB |
273 | VirtIOBlockDataPlane *s = container_of(e, VirtIOBlockDataPlane, |
274 | host_notifier); | |
e72f66a0 SH |
275 | |
276 | /* There is one array of iovecs into which all new requests are extracted | |
277 | * from the vring. Requests are read from the vring and the translated | |
278 | * descriptors are written to the iovecs array. The iovecs do not have to | |
279 | * persist across handle_notify() calls because the kernel copies the | |
280 | * iovecs on io_submit(). | |
281 | * | |
282 | * Handling io_submit() EAGAIN may require storing the requests across | |
283 | * handle_notify() calls until the kernel has sufficient resources to | |
284 | * accept more I/O. This is not implemented yet. | |
285 | */ | |
286 | struct iovec iovec[VRING_MAX]; | |
287 | struct iovec *end = &iovec[VRING_MAX]; | |
288 | struct iovec *iov = iovec; | |
289 | ||
290 | /* When a request is read from the vring, the index of the first descriptor | |
291 | * (aka head) is returned so that the completed request can be pushed onto | |
292 | * the vring later. | |
293 | * | |
294 | * The number of hypervisor read-only iovecs is out_num. The number of | |
295 | * hypervisor write-only iovecs is in_num. | |
296 | */ | |
297 | int head; | |
298 | unsigned int out_num = 0, in_num = 0; | |
299 | unsigned int num_queued; | |
300 | ||
2c20e711 | 301 | event_notifier_test_and_clear(&s->host_notifier); |
e72f66a0 SH |
302 | for (;;) { |
303 | /* Disable guest->host notifies to avoid unnecessary vmexits */ | |
304 | vring_disable_notification(s->vdev, &s->vring); | |
305 | ||
306 | for (;;) { | |
307 | head = vring_pop(s->vdev, &s->vring, iov, end, &out_num, &in_num); | |
308 | if (head < 0) { | |
309 | break; /* no more requests */ | |
310 | } | |
311 | ||
312 | trace_virtio_blk_data_plane_process_request(s, out_num, in_num, | |
313 | head); | |
314 | ||
315 | if (process_request(&s->ioqueue, iov, out_num, in_num, head) < 0) { | |
316 | vring_set_broken(&s->vring); | |
317 | break; | |
318 | } | |
319 | iov += out_num + in_num; | |
320 | } | |
321 | ||
322 | if (likely(head == -EAGAIN)) { /* vring emptied */ | |
323 | /* Re-enable guest->host notifies and stop processing the vring. | |
324 | * But if the guest has snuck in more descriptors, keep processing. | |
325 | */ | |
326 | if (vring_enable_notification(s->vdev, &s->vring)) { | |
327 | break; | |
328 | } | |
329 | } else { /* head == -ENOBUFS or fatal error, iovecs[] is depleted */ | |
330 | /* Since there are no iovecs[] left, stop processing for now. Do | |
331 | * not re-enable guest->host notifies since the I/O completion | |
332 | * handler knows to check for more vring descriptors anyway. | |
333 | */ | |
334 | break; | |
335 | } | |
336 | } | |
337 | ||
338 | num_queued = ioq_num_queued(&s->ioqueue); | |
339 | if (num_queued > 0) { | |
340 | s->num_reqs += num_queued; | |
341 | ||
342 | int rc = ioq_submit(&s->ioqueue); | |
343 | if (unlikely(rc < 0)) { | |
344 | fprintf(stderr, "ioq_submit failed %d\n", rc); | |
345 | exit(1); | |
346 | } | |
347 | } | |
348 | } | |
349 | ||
485e3ce8 PB |
350 | static int flush_io(EventNotifier *e) |
351 | { | |
352 | VirtIOBlockDataPlane *s = container_of(e, VirtIOBlockDataPlane, | |
353 | io_notifier); | |
354 | ||
355 | return s->num_reqs > 0; | |
356 | } | |
357 | ||
2c20e711 | 358 | static void handle_io(EventNotifier *e) |
e72f66a0 | 359 | { |
2c20e711 PB |
360 | VirtIOBlockDataPlane *s = container_of(e, VirtIOBlockDataPlane, |
361 | io_notifier); | |
e72f66a0 | 362 | |
2c20e711 | 363 | event_notifier_test_and_clear(&s->io_notifier); |
e72f66a0 SH |
364 | if (ioq_run_completion(&s->ioqueue, complete_request, s) > 0) { |
365 | notify_guest(s); | |
366 | } | |
367 | ||
368 | /* If there were more requests than iovecs, the vring will not be empty yet | |
369 | * so check again. There should now be enough resources to process more | |
370 | * requests. | |
371 | */ | |
372 | if (unlikely(vring_more_avail(&s->vring))) { | |
2c20e711 | 373 | handle_notify(&s->host_notifier); |
e72f66a0 SH |
374 | } |
375 | } | |
376 | ||
377 | static void *data_plane_thread(void *opaque) | |
378 | { | |
379 | VirtIOBlockDataPlane *s = opaque; | |
380 | ||
381 | do { | |
2c20e711 | 382 | aio_poll(s->ctx, true); |
cd7fdfe5 | 383 | } while (!s->stopping || s->num_reqs > 0); |
e72f66a0 SH |
384 | return NULL; |
385 | } | |
386 | ||
387 | static void start_data_plane_bh(void *opaque) | |
388 | { | |
389 | VirtIOBlockDataPlane *s = opaque; | |
390 | ||
391 | qemu_bh_delete(s->start_bh); | |
392 | s->start_bh = NULL; | |
393 | qemu_thread_create(&s->thread, data_plane_thread, | |
394 | s, QEMU_THREAD_JOINABLE); | |
395 | } | |
396 | ||
397 | bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk, | |
398 | VirtIOBlockDataPlane **dataplane) | |
399 | { | |
400 | VirtIOBlockDataPlane *s; | |
401 | int fd; | |
402 | ||
403 | *dataplane = NULL; | |
404 | ||
405 | if (!blk->data_plane) { | |
406 | return true; | |
407 | } | |
408 | ||
409 | if (blk->scsi) { | |
410 | error_report("device is incompatible with x-data-plane, use scsi=off"); | |
411 | return false; | |
412 | } | |
413 | ||
414 | if (blk->config_wce) { | |
415 | error_report("device is incompatible with x-data-plane, " | |
416 | "use config-wce=off"); | |
417 | return false; | |
418 | } | |
419 | ||
420 | fd = raw_get_aio_fd(blk->conf.bs); | |
421 | if (fd < 0) { | |
422 | error_report("drive is incompatible with x-data-plane, " | |
423 | "use format=raw,cache=none,aio=native"); | |
424 | return false; | |
425 | } | |
426 | ||
427 | s = g_new0(VirtIOBlockDataPlane, 1); | |
428 | s->vdev = vdev; | |
429 | s->fd = fd; | |
430 | s->blk = blk; | |
431 | ||
432 | /* Prevent block operations that conflict with data plane thread */ | |
433 | bdrv_set_in_use(blk->conf.bs, 1); | |
434 | ||
435 | error_setg(&s->migration_blocker, | |
436 | "x-data-plane does not support migration"); | |
437 | migrate_add_blocker(s->migration_blocker); | |
438 | ||
439 | *dataplane = s; | |
440 | return true; | |
441 | } | |
442 | ||
443 | void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s) | |
444 | { | |
445 | if (!s) { | |
446 | return; | |
447 | } | |
448 | ||
449 | virtio_blk_data_plane_stop(s); | |
450 | migrate_del_blocker(s->migration_blocker); | |
451 | error_free(s->migration_blocker); | |
452 | bdrv_set_in_use(s->blk->conf.bs, 0); | |
453 | g_free(s); | |
454 | } | |
455 | ||
456 | void virtio_blk_data_plane_start(VirtIOBlockDataPlane *s) | |
457 | { | |
458 | VirtQueue *vq; | |
459 | int i; | |
460 | ||
461 | if (s->started) { | |
462 | return; | |
463 | } | |
464 | ||
465 | vq = virtio_get_queue(s->vdev, 0); | |
466 | if (!vring_setup(&s->vring, s->vdev, 0)) { | |
467 | return; | |
468 | } | |
469 | ||
2c20e711 | 470 | s->ctx = aio_context_new(); |
e72f66a0 SH |
471 | |
472 | /* Set up guest notifier (irq) */ | |
b8bec49c | 473 | if (s->vdev->binding->set_guest_notifiers(s->vdev->binding_opaque, 1, |
e72f66a0 SH |
474 | true) != 0) { |
475 | fprintf(stderr, "virtio-blk failed to set guest notifier, " | |
476 | "ensure -enable-kvm is set\n"); | |
477 | exit(1); | |
478 | } | |
479 | s->guest_notifier = virtio_queue_get_guest_notifier(vq); | |
480 | ||
481 | /* Set up virtqueue notify */ | |
482 | if (s->vdev->binding->set_host_notifier(s->vdev->binding_opaque, | |
483 | 0, true) != 0) { | |
484 | fprintf(stderr, "virtio-blk failed to set host notifier\n"); | |
485 | exit(1); | |
486 | } | |
2c20e711 | 487 | s->host_notifier = *virtio_queue_get_host_notifier(vq); |
485e3ce8 | 488 | aio_set_event_notifier(s->ctx, &s->host_notifier, handle_notify, flush_true); |
e72f66a0 SH |
489 | |
490 | /* Set up ioqueue */ | |
491 | ioq_init(&s->ioqueue, s->fd, REQ_MAX); | |
492 | for (i = 0; i < ARRAY_SIZE(s->requests); i++) { | |
493 | ioq_put_iocb(&s->ioqueue, &s->requests[i].iocb); | |
494 | } | |
2c20e711 | 495 | s->io_notifier = *ioq_get_notifier(&s->ioqueue); |
485e3ce8 | 496 | aio_set_event_notifier(s->ctx, &s->io_notifier, handle_io, flush_io); |
e72f66a0 SH |
497 | |
498 | s->started = true; | |
499 | trace_virtio_blk_data_plane_start(s); | |
500 | ||
501 | /* Kick right away to begin processing requests already in vring */ | |
502 | event_notifier_set(virtio_queue_get_host_notifier(vq)); | |
503 | ||
504 | /* Spawn thread in BH so it inherits iothread cpusets */ | |
505 | s->start_bh = qemu_bh_new(start_data_plane_bh, s); | |
506 | qemu_bh_schedule(s->start_bh); | |
507 | } | |
508 | ||
509 | void virtio_blk_data_plane_stop(VirtIOBlockDataPlane *s) | |
510 | { | |
cd7fdfe5 | 511 | if (!s->started || s->stopping) { |
e72f66a0 SH |
512 | return; |
513 | } | |
cd7fdfe5 | 514 | s->stopping = true; |
e72f66a0 SH |
515 | trace_virtio_blk_data_plane_stop(s); |
516 | ||
517 | /* Stop thread or cancel pending thread creation BH */ | |
518 | if (s->start_bh) { | |
519 | qemu_bh_delete(s->start_bh); | |
520 | s->start_bh = NULL; | |
521 | } else { | |
2c20e711 | 522 | aio_notify(s->ctx); |
e72f66a0 SH |
523 | qemu_thread_join(&s->thread); |
524 | } | |
525 | ||
2c20e711 | 526 | aio_set_event_notifier(s->ctx, &s->io_notifier, NULL, NULL); |
e72f66a0 SH |
527 | ioq_cleanup(&s->ioqueue); |
528 | ||
2c20e711 | 529 | aio_set_event_notifier(s->ctx, &s->host_notifier, NULL, NULL); |
e72f66a0 SH |
530 | s->vdev->binding->set_host_notifier(s->vdev->binding_opaque, 0, false); |
531 | ||
2c20e711 | 532 | aio_context_unref(s->ctx); |
e72f66a0 SH |
533 | |
534 | /* Clean up guest notifier (irq) */ | |
b8bec49c | 535 | s->vdev->binding->set_guest_notifiers(s->vdev->binding_opaque, 1, false); |
e72f66a0 SH |
536 | |
537 | vring_teardown(&s->vring); | |
cd7fdfe5 SH |
538 | s->started = false; |
539 | s->stopping = false; | |
e72f66a0 | 540 | } |