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Commit | Line | Data |
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6e02c38d AL |
1 | /* |
2 | * Virtio Block Device | |
3 | * | |
4 | * Copyright IBM, Corp. 2007 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
80c71a24 | 14 | #include "qemu/osdep.h" |
433fcea4 | 15 | #include "qemu/defer-call.h" |
da34e65c | 16 | #include "qapi/error.h" |
827805a2 | 17 | #include "qemu/iov.h" |
0b8fa32f | 18 | #include "qemu/module.h" |
1de7afc9 | 19 | #include "qemu/error-report.h" |
9b92fbcf | 20 | #include "qemu/main-loop.h" |
4f736650 | 21 | #include "block/block_int.h" |
6d519a5f | 22 | #include "trace.h" |
0d09e41a | 23 | #include "hw/block/block.h" |
a27bd6c7 | 24 | #include "hw/qdev-properties.h" |
9c17d615 | 25 | #include "sysemu/blockdev.h" |
baf42268 | 26 | #include "sysemu/block-ram-registrar.h" |
2f780b6a | 27 | #include "sysemu/sysemu.h" |
54d31236 | 28 | #include "sysemu/runstate.h" |
0d09e41a | 29 | #include "hw/virtio/virtio-blk.h" |
52b53c04 | 30 | #include "dataplane/virtio-blk.h" |
08e2c9f1 | 31 | #include "scsi/constants.h" |
1063b8b1 CH |
32 | #ifdef __linux__ |
33 | # include <scsi/sg.h> | |
34 | #endif | |
0d09e41a | 35 | #include "hw/virtio/virtio-bus.h" |
ca77ee28 | 36 | #include "migration/qemu-file-types.h" |
783d1897 | 37 | #include "hw/virtio/virtio-access.h" |
d9cf55a8 | 38 | #include "hw/virtio/virtio-blk-common.h" |
4c41c69e | 39 | #include "qemu/coroutine.h" |
6e02c38d | 40 | |
d14dde5e GK |
41 | static void virtio_blk_init_request(VirtIOBlock *s, VirtQueue *vq, |
42 | VirtIOBlockReq *req) | |
671ec3f0 | 43 | { |
671ec3f0 | 44 | req->dev = s; |
edaffd9f | 45 | req->vq = vq; |
869d66af | 46 | req->qiov.size = 0; |
2a6cdd6d | 47 | req->in_len = 0; |
869d66af | 48 | req->next = NULL; |
95f7142a | 49 | req->mr_next = NULL; |
671ec3f0 FZ |
50 | } |
51 | ||
d14dde5e | 52 | static void virtio_blk_free_request(VirtIOBlockReq *req) |
671ec3f0 | 53 | { |
1d29b5b0 | 54 | g_free(req); |
671ec3f0 FZ |
55 | } |
56 | ||
03de2f52 | 57 | static void virtio_blk_req_complete(VirtIOBlockReq *req, unsigned char status) |
869a5c6d AL |
58 | { |
59 | VirtIOBlock *s = req->dev; | |
1cc91b7d | 60 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
869a5c6d | 61 | |
a576ceac | 62 | trace_virtio_blk_req_complete(vdev, req, status); |
6d519a5f | 63 | |
92e3c2a3 | 64 | stb_p(&req->in->status, status); |
7bd04a04 SH |
65 | iov_discard_undo(&req->inhdr_undo); |
66 | iov_discard_undo(&req->outhdr_undo); | |
edaffd9f | 67 | virtqueue_push(req->vq, &req->elem, req->in_len); |
eb41cf78 | 68 | if (s->dataplane_started && !s->dataplane_disabled) { |
edaffd9f | 69 | virtio_blk_data_plane_notify(s->dataplane, req->vq); |
03de2f52 | 70 | } else { |
edaffd9f | 71 | virtio_notify(vdev, req->vq); |
03de2f52 | 72 | } |
bf4bd461 FZ |
73 | } |
74 | ||
f35d68f0 | 75 | static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error, |
00f639fb | 76 | bool is_read, bool acct_failed) |
869a5c6d | 77 | { |
869a5c6d | 78 | VirtIOBlock *s = req->dev; |
9a6719d5 | 79 | BlockErrorAction action = blk_get_error_action(s->blk, is_read, error); |
869a5c6d | 80 | |
a589569f | 81 | if (action == BLOCK_ERROR_ACTION_STOP) { |
466138dc FZ |
82 | /* Break the link as the next request is going to be parsed from the |
83 | * ring again. Otherwise we may end up doing a double completion! */ | |
84 | req->mr_next = NULL; | |
869a5c6d AL |
85 | req->next = s->rq; |
86 | s->rq = req; | |
a589569f | 87 | } else if (action == BLOCK_ERROR_ACTION_REPORT) { |
869a5c6d | 88 | virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); |
00f639fb SG |
89 | if (acct_failed) { |
90 | block_acct_failed(blk_get_stats(s->blk), &req->acct); | |
91 | } | |
671ec3f0 | 92 | virtio_blk_free_request(req); |
869a5c6d AL |
93 | } |
94 | ||
4be74634 | 95 | blk_error_action(s->blk, action, is_read, error); |
a589569f | 96 | return action != BLOCK_ERROR_ACTION_IGNORE; |
869a5c6d AL |
97 | } |
98 | ||
6e02c38d AL |
99 | static void virtio_blk_rw_complete(void *opaque, int ret) |
100 | { | |
95f7142a | 101 | VirtIOBlockReq *next = opaque; |
b9e413dd | 102 | VirtIOBlock *s = next->dev; |
a576ceac | 103 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
95f7142a | 104 | |
b9e413dd | 105 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
95f7142a PL |
106 | while (next) { |
107 | VirtIOBlockReq *req = next; | |
108 | next = req->mr_next; | |
a576ceac | 109 | trace_virtio_blk_rw_complete(vdev, req, ret); |
95f7142a PL |
110 | |
111 | if (req->qiov.nalloc != -1) { | |
e61809ed | 112 | /* If nalloc is != -1 req->qiov is a local copy of the original |
9bb192a4 YB |
113 | * external iovec. It was allocated in submit_requests to be |
114 | * able to merge requests. */ | |
95f7142a PL |
115 | qemu_iovec_destroy(&req->qiov); |
116 | } | |
6e02c38d | 117 | |
95f7142a | 118 | if (ret) { |
bf4069fb | 119 | int p = virtio_ldl_p(VIRTIO_DEVICE(s), &req->out.type); |
95f7142a | 120 | bool is_read = !(p & VIRTIO_BLK_T_OUT); |
2a6cdd6d PB |
121 | /* Note that memory may be dirtied on read failure. If the |
122 | * virtio request is not completed here, as is the case for | |
123 | * BLOCK_ERROR_ACTION_STOP, the memory may not be copied | |
124 | * correctly during live migration. While this is ugly, | |
125 | * it is acceptable because the device is free to write to | |
126 | * the memory until the request is completed (which will | |
127 | * happen on the other side of the migration). | |
128 | */ | |
00f639fb | 129 | if (virtio_blk_handle_rw_error(req, -ret, is_read, true)) { |
95f7142a PL |
130 | continue; |
131 | } | |
132 | } | |
6d519a5f | 133 | |
95f7142a | 134 | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); |
bf4069fb | 135 | block_acct_done(blk_get_stats(s->blk), &req->acct); |
95f7142a | 136 | virtio_blk_free_request(req); |
6e02c38d | 137 | } |
b9e413dd | 138 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); |
869a5c6d | 139 | } |
6e02c38d | 140 | |
aa659be3 CH |
141 | static void virtio_blk_flush_complete(void *opaque, int ret) |
142 | { | |
143 | VirtIOBlockReq *req = opaque; | |
b9e413dd | 144 | VirtIOBlock *s = req->dev; |
aa659be3 | 145 | |
b9e413dd | 146 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
8c269b54 | 147 | if (ret) { |
00f639fb | 148 | if (virtio_blk_handle_rw_error(req, -ret, 0, true)) { |
b9e413dd | 149 | goto out; |
8c269b54 KW |
150 | } |
151 | } | |
152 | ||
153 | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); | |
9a6719d5 | 154 | block_acct_done(blk_get_stats(s->blk), &req->acct); |
671ec3f0 | 155 | virtio_blk_free_request(req); |
b9e413dd PB |
156 | |
157 | out: | |
158 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); | |
6e02c38d AL |
159 | } |
160 | ||
37b06f8d SG |
161 | static void virtio_blk_discard_write_zeroes_complete(void *opaque, int ret) |
162 | { | |
163 | VirtIOBlockReq *req = opaque; | |
164 | VirtIOBlock *s = req->dev; | |
165 | bool is_write_zeroes = (virtio_ldl_p(VIRTIO_DEVICE(s), &req->out.type) & | |
166 | ~VIRTIO_BLK_T_BARRIER) == VIRTIO_BLK_T_WRITE_ZEROES; | |
167 | ||
168 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); | |
169 | if (ret) { | |
170 | if (virtio_blk_handle_rw_error(req, -ret, false, is_write_zeroes)) { | |
171 | goto out; | |
172 | } | |
173 | } | |
174 | ||
175 | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); | |
176 | if (is_write_zeroes) { | |
177 | block_acct_done(blk_get_stats(s->blk), &req->acct); | |
178 | } | |
179 | virtio_blk_free_request(req); | |
180 | ||
181 | out: | |
182 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); | |
183 | } | |
184 | ||
1dc936aa FZ |
185 | #ifdef __linux__ |
186 | ||
187 | typedef struct { | |
188 | VirtIOBlockReq *req; | |
189 | struct sg_io_hdr hdr; | |
190 | } VirtIOBlockIoctlReq; | |
191 | ||
192 | static void virtio_blk_ioctl_complete(void *opaque, int status) | |
193 | { | |
194 | VirtIOBlockIoctlReq *ioctl_req = opaque; | |
195 | VirtIOBlockReq *req = ioctl_req->req; | |
9d456654 PB |
196 | VirtIOBlock *s = req->dev; |
197 | VirtIODevice *vdev = VIRTIO_DEVICE(s); | |
1dc936aa FZ |
198 | struct virtio_scsi_inhdr *scsi; |
199 | struct sg_io_hdr *hdr; | |
200 | ||
201 | scsi = (void *)req->elem.in_sg[req->elem.in_num - 2].iov_base; | |
202 | ||
203 | if (status) { | |
204 | status = VIRTIO_BLK_S_UNSUPP; | |
205 | virtio_stl_p(vdev, &scsi->errors, 255); | |
206 | goto out; | |
207 | } | |
208 | ||
209 | hdr = &ioctl_req->hdr; | |
210 | /* | |
211 | * From SCSI-Generic-HOWTO: "Some lower level drivers (e.g. ide-scsi) | |
212 | * clear the masked_status field [hence status gets cleared too, see | |
213 | * block/scsi_ioctl.c] even when a CHECK_CONDITION or COMMAND_TERMINATED | |
214 | * status has occurred. However they do set DRIVER_SENSE in driver_status | |
215 | * field. Also a (sb_len_wr > 0) indicates there is a sense buffer. | |
216 | */ | |
217 | if (hdr->status == 0 && hdr->sb_len_wr > 0) { | |
218 | hdr->status = CHECK_CONDITION; | |
219 | } | |
220 | ||
221 | virtio_stl_p(vdev, &scsi->errors, | |
222 | hdr->status | (hdr->msg_status << 8) | | |
223 | (hdr->host_status << 16) | (hdr->driver_status << 24)); | |
224 | virtio_stl_p(vdev, &scsi->residual, hdr->resid); | |
225 | virtio_stl_p(vdev, &scsi->sense_len, hdr->sb_len_wr); | |
226 | virtio_stl_p(vdev, &scsi->data_len, hdr->dxfer_len); | |
227 | ||
228 | out: | |
b9e413dd | 229 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
1dc936aa FZ |
230 | virtio_blk_req_complete(req, status); |
231 | virtio_blk_free_request(req); | |
b9e413dd | 232 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); |
1dc936aa FZ |
233 | g_free(ioctl_req); |
234 | } | |
235 | ||
236 | #endif | |
237 | ||
edaffd9f | 238 | static VirtIOBlockReq *virtio_blk_get_request(VirtIOBlock *s, VirtQueue *vq) |
6e02c38d | 239 | { |
edaffd9f | 240 | VirtIOBlockReq *req = virtqueue_pop(vq, sizeof(VirtIOBlockReq)); |
6e02c38d | 241 | |
51b19ebe | 242 | if (req) { |
edaffd9f | 243 | virtio_blk_init_request(s, vq, req); |
6e02c38d | 244 | } |
6e02c38d AL |
245 | return req; |
246 | } | |
247 | ||
75344fa4 | 248 | static int virtio_blk_handle_scsi_req(VirtIOBlockReq *req) |
1063b8b1 | 249 | { |
5a05cbee FZ |
250 | int status = VIRTIO_BLK_S_OK; |
251 | struct virtio_scsi_inhdr *scsi = NULL; | |
75344fa4 | 252 | VirtIOBlock *blk = req->dev; |
bf4069fb AR |
253 | VirtIODevice *vdev = VIRTIO_DEVICE(blk); |
254 | VirtQueueElement *elem = &req->elem; | |
783d1897 | 255 | |
47ce9ef7 | 256 | #ifdef __linux__ |
1063b8b1 | 257 | int i; |
1dc936aa | 258 | VirtIOBlockIoctlReq *ioctl_req; |
a209f461 | 259 | BlockAIOCB *acb; |
47ce9ef7 | 260 | #endif |
1063b8b1 CH |
261 | |
262 | /* | |
263 | * We require at least one output segment each for the virtio_blk_outhdr | |
264 | * and the SCSI command block. | |
265 | * | |
266 | * We also at least require the virtio_blk_inhdr, the virtio_scsi_inhdr | |
267 | * and the sense buffer pointer in the input segments. | |
268 | */ | |
5a05cbee FZ |
269 | if (elem->out_num < 2 || elem->in_num < 3) { |
270 | status = VIRTIO_BLK_S_IOERR; | |
271 | goto fail; | |
1063b8b1 CH |
272 | } |
273 | ||
274 | /* | |
f34e73cd PB |
275 | * The scsi inhdr is placed in the second-to-last input segment, just |
276 | * before the regular inhdr. | |
1063b8b1 | 277 | */ |
5a05cbee | 278 | scsi = (void *)elem->in_sg[elem->in_num - 2].iov_base; |
f34e73cd | 279 | |
bbe8bd4d | 280 | if (!virtio_has_feature(blk->host_features, VIRTIO_BLK_F_SCSI)) { |
f34e73cd PB |
281 | status = VIRTIO_BLK_S_UNSUPP; |
282 | goto fail; | |
1063b8b1 CH |
283 | } |
284 | ||
285 | /* | |
f34e73cd | 286 | * No support for bidirection commands yet. |
1063b8b1 | 287 | */ |
5a05cbee | 288 | if (elem->out_num > 2 && elem->in_num > 3) { |
f34e73cd PB |
289 | status = VIRTIO_BLK_S_UNSUPP; |
290 | goto fail; | |
291 | } | |
1063b8b1 | 292 | |
f34e73cd | 293 | #ifdef __linux__ |
1dc936aa FZ |
294 | ioctl_req = g_new0(VirtIOBlockIoctlReq, 1); |
295 | ioctl_req->req = req; | |
296 | ioctl_req->hdr.interface_id = 'S'; | |
297 | ioctl_req->hdr.cmd_len = elem->out_sg[1].iov_len; | |
298 | ioctl_req->hdr.cmdp = elem->out_sg[1].iov_base; | |
299 | ioctl_req->hdr.dxfer_len = 0; | |
1063b8b1 | 300 | |
5a05cbee | 301 | if (elem->out_num > 2) { |
1063b8b1 CH |
302 | /* |
303 | * If there are more than the minimally required 2 output segments | |
304 | * there is write payload starting from the third iovec. | |
305 | */ | |
1dc936aa FZ |
306 | ioctl_req->hdr.dxfer_direction = SG_DXFER_TO_DEV; |
307 | ioctl_req->hdr.iovec_count = elem->out_num - 2; | |
1063b8b1 | 308 | |
1dc936aa FZ |
309 | for (i = 0; i < ioctl_req->hdr.iovec_count; i++) { |
310 | ioctl_req->hdr.dxfer_len += elem->out_sg[i + 2].iov_len; | |
311 | } | |
1063b8b1 | 312 | |
1dc936aa | 313 | ioctl_req->hdr.dxferp = elem->out_sg + 2; |
1063b8b1 | 314 | |
5a05cbee | 315 | } else if (elem->in_num > 3) { |
1063b8b1 CH |
316 | /* |
317 | * If we have more than 3 input segments the guest wants to actually | |
318 | * read data. | |
319 | */ | |
1dc936aa FZ |
320 | ioctl_req->hdr.dxfer_direction = SG_DXFER_FROM_DEV; |
321 | ioctl_req->hdr.iovec_count = elem->in_num - 3; | |
322 | for (i = 0; i < ioctl_req->hdr.iovec_count; i++) { | |
323 | ioctl_req->hdr.dxfer_len += elem->in_sg[i].iov_len; | |
324 | } | |
1063b8b1 | 325 | |
1dc936aa | 326 | ioctl_req->hdr.dxferp = elem->in_sg; |
1063b8b1 CH |
327 | } else { |
328 | /* | |
329 | * Some SCSI commands don't actually transfer any data. | |
330 | */ | |
1dc936aa | 331 | ioctl_req->hdr.dxfer_direction = SG_DXFER_NONE; |
1063b8b1 CH |
332 | } |
333 | ||
1dc936aa FZ |
334 | ioctl_req->hdr.sbp = elem->in_sg[elem->in_num - 3].iov_base; |
335 | ioctl_req->hdr.mx_sb_len = elem->in_sg[elem->in_num - 3].iov_len; | |
1063b8b1 | 336 | |
a209f461 FZ |
337 | acb = blk_aio_ioctl(blk->blk, SG_IO, &ioctl_req->hdr, |
338 | virtio_blk_ioctl_complete, ioctl_req); | |
339 | if (!acb) { | |
340 | g_free(ioctl_req); | |
341 | status = VIRTIO_BLK_S_UNSUPP; | |
342 | goto fail; | |
343 | } | |
1dc936aa | 344 | return -EINPROGRESS; |
1063b8b1 | 345 | #else |
f34e73cd PB |
346 | abort(); |
347 | #endif | |
348 | ||
349 | fail: | |
350 | /* Just put anything nonzero so that the ioctl fails in the guest. */ | |
5a05cbee | 351 | if (scsi) { |
783d1897 | 352 | virtio_stl_p(vdev, &scsi->errors, 255); |
5a05cbee FZ |
353 | } |
354 | return status; | |
355 | } | |
356 | ||
357 | static void virtio_blk_handle_scsi(VirtIOBlockReq *req) | |
358 | { | |
359 | int status; | |
360 | ||
75344fa4 | 361 | status = virtio_blk_handle_scsi_req(req); |
1dc936aa FZ |
362 | if (status != -EINPROGRESS) { |
363 | virtio_blk_req_complete(req, status); | |
364 | virtio_blk_free_request(req); | |
365 | } | |
1063b8b1 | 366 | } |
1063b8b1 | 367 | |
baf42268 | 368 | static inline void submit_requests(VirtIOBlock *s, MultiReqBuffer *mrb, |
95f7142a | 369 | int start, int num_reqs, int niov) |
869a5c6d | 370 | { |
baf42268 | 371 | BlockBackend *blk = s->blk; |
95f7142a PL |
372 | QEMUIOVector *qiov = &mrb->reqs[start]->qiov; |
373 | int64_t sector_num = mrb->reqs[start]->sector_num; | |
95f7142a | 374 | bool is_write = mrb->is_write; |
baf42268 | 375 | BdrvRequestFlags flags = 0; |
95f7142a PL |
376 | |
377 | if (num_reqs > 1) { | |
378 | int i; | |
379 | struct iovec *tmp_iov = qiov->iov; | |
380 | int tmp_niov = qiov->niov; | |
381 | ||
382 | /* mrb->reqs[start]->qiov was initialized from external so we can't | |
b5772fdd | 383 | * modify it here. We need to initialize it locally and then add the |
95f7142a PL |
384 | * external iovecs. */ |
385 | qemu_iovec_init(qiov, niov); | |
386 | ||
387 | for (i = 0; i < tmp_niov; i++) { | |
388 | qemu_iovec_add(qiov, tmp_iov[i].iov_base, tmp_iov[i].iov_len); | |
389 | } | |
390 | ||
391 | for (i = start + 1; i < start + num_reqs; i++) { | |
392 | qemu_iovec_concat(qiov, &mrb->reqs[i]->qiov, 0, | |
393 | mrb->reqs[i]->qiov.size); | |
394 | mrb->reqs[i - 1]->mr_next = mrb->reqs[i]; | |
95f7142a | 395 | } |
95f7142a | 396 | |
a576ceac SH |
397 | trace_virtio_blk_submit_multireq(VIRTIO_DEVICE(mrb->reqs[start]->dev), |
398 | mrb, start, num_reqs, | |
b5772fdd EB |
399 | sector_num << BDRV_SECTOR_BITS, |
400 | qiov->size, is_write); | |
95f7142a PL |
401 | block_acct_merge_done(blk_get_stats(blk), |
402 | is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ, | |
403 | num_reqs - 1); | |
404 | } | |
91553dcc | 405 | |
baf42268 SH |
406 | if (blk_ram_registrar_ok(&s->blk_ram_registrar)) { |
407 | flags |= BDRV_REQ_REGISTERED_BUF; | |
408 | } | |
409 | ||
95f7142a | 410 | if (is_write) { |
baf42268 SH |
411 | blk_aio_pwritev(blk, sector_num << BDRV_SECTOR_BITS, qiov, |
412 | flags, virtio_blk_rw_complete, | |
413 | mrb->reqs[start]); | |
95f7142a | 414 | } else { |
baf42268 SH |
415 | blk_aio_preadv(blk, sector_num << BDRV_SECTOR_BITS, qiov, |
416 | flags, virtio_blk_rw_complete, | |
417 | mrb->reqs[start]); | |
95f7142a PL |
418 | } |
419 | } | |
420 | ||
421 | static int multireq_compare(const void *a, const void *b) | |
422 | { | |
423 | const VirtIOBlockReq *req1 = *(VirtIOBlockReq **)a, | |
424 | *req2 = *(VirtIOBlockReq **)b; | |
425 | ||
426 | /* | |
427 | * Note that we can't simply subtract sector_num1 from sector_num2 | |
428 | * here as that could overflow the return value. | |
429 | */ | |
430 | if (req1->sector_num > req2->sector_num) { | |
431 | return 1; | |
432 | } else if (req1->sector_num < req2->sector_num) { | |
433 | return -1; | |
434 | } else { | |
435 | return 0; | |
436 | } | |
437 | } | |
438 | ||
baf42268 | 439 | static void virtio_blk_submit_multireq(VirtIOBlock *s, MultiReqBuffer *mrb) |
95f7142a PL |
440 | { |
441 | int i = 0, start = 0, num_reqs = 0, niov = 0, nb_sectors = 0; | |
5def6b80 | 442 | uint32_t max_transfer; |
95f7142a PL |
443 | int64_t sector_num = 0; |
444 | ||
445 | if (mrb->num_reqs == 1) { | |
baf42268 | 446 | submit_requests(s, mrb, 0, 1, -1); |
95f7142a | 447 | mrb->num_reqs = 0; |
c20fd872 CH |
448 | return; |
449 | } | |
450 | ||
5def6b80 | 451 | max_transfer = blk_get_max_transfer(mrb->reqs[0]->dev->blk); |
95f7142a PL |
452 | |
453 | qsort(mrb->reqs, mrb->num_reqs, sizeof(*mrb->reqs), | |
454 | &multireq_compare); | |
455 | ||
456 | for (i = 0; i < mrb->num_reqs; i++) { | |
457 | VirtIOBlockReq *req = mrb->reqs[i]; | |
458 | if (num_reqs > 0) { | |
49cffbc6 GA |
459 | /* |
460 | * NOTE: We cannot merge the requests in below situations: | |
461 | * 1. requests are not sequential | |
462 | * 2. merge would exceed maximum number of IOVs | |
463 | * 3. merge would exceed maximum transfer length of backend device | |
464 | */ | |
465 | if (sector_num + nb_sectors != req->sector_num || | |
baf42268 | 466 | niov > blk_get_max_iov(s->blk) - req->qiov.niov || |
5def6b80 EB |
467 | req->qiov.size > max_transfer || |
468 | nb_sectors > (max_transfer - | |
469 | req->qiov.size) / BDRV_SECTOR_SIZE) { | |
baf42268 | 470 | submit_requests(s, mrb, start, num_reqs, niov); |
95f7142a | 471 | num_reqs = 0; |
91553dcc KW |
472 | } |
473 | } | |
95f7142a PL |
474 | |
475 | if (num_reqs == 0) { | |
476 | sector_num = req->sector_num; | |
477 | nb_sectors = niov = 0; | |
478 | start = i; | |
479 | } | |
480 | ||
481 | nb_sectors += req->qiov.size / BDRV_SECTOR_SIZE; | |
482 | niov += req->qiov.niov; | |
483 | num_reqs++; | |
91553dcc | 484 | } |
c20fd872 | 485 | |
baf42268 | 486 | submit_requests(s, mrb, start, num_reqs, niov); |
95f7142a | 487 | mrb->num_reqs = 0; |
91553dcc | 488 | } |
87b245db | 489 | |
c20fd872 | 490 | static void virtio_blk_handle_flush(VirtIOBlockReq *req, MultiReqBuffer *mrb) |
aa659be3 | 491 | { |
bf4069fb AR |
492 | VirtIOBlock *s = req->dev; |
493 | ||
494 | block_acct_start(blk_get_stats(s->blk), &req->acct, 0, | |
5366d0c8 | 495 | BLOCK_ACCT_FLUSH); |
a597e79c | 496 | |
618fbb84 CH |
497 | /* |
498 | * Make sure all outstanding writes are posted to the backing device. | |
499 | */ | |
95f7142a | 500 | if (mrb->is_write && mrb->num_reqs > 0) { |
baf42268 | 501 | virtio_blk_submit_multireq(s, mrb); |
95f7142a | 502 | } |
bf4069fb | 503 | blk_aio_flush(s->blk, virtio_blk_flush_complete, req); |
aa659be3 CH |
504 | } |
505 | ||
d0e14376 MA |
506 | static bool virtio_blk_sect_range_ok(VirtIOBlock *dev, |
507 | uint64_t sector, size_t size) | |
508 | { | |
3c2daac0 MA |
509 | uint64_t nb_sectors = size >> BDRV_SECTOR_BITS; |
510 | uint64_t total_sectors; | |
511 | ||
75af1f34 | 512 | if (nb_sectors > BDRV_REQUEST_MAX_SECTORS) { |
95f7142a PL |
513 | return false; |
514 | } | |
d0e14376 MA |
515 | if (sector & dev->sector_mask) { |
516 | return false; | |
517 | } | |
2a30307f | 518 | if (size % dev->conf.conf.logical_block_size) { |
d0e14376 MA |
519 | return false; |
520 | } | |
4be74634 | 521 | blk_get_geometry(dev->blk, &total_sectors); |
3c2daac0 MA |
522 | if (sector > total_sectors || nb_sectors > total_sectors - sector) { |
523 | return false; | |
524 | } | |
d0e14376 MA |
525 | return true; |
526 | } | |
527 | ||
37b06f8d SG |
528 | static uint8_t virtio_blk_handle_discard_write_zeroes(VirtIOBlockReq *req, |
529 | struct virtio_blk_discard_write_zeroes *dwz_hdr, bool is_write_zeroes) | |
530 | { | |
531 | VirtIOBlock *s = req->dev; | |
532 | VirtIODevice *vdev = VIRTIO_DEVICE(s); | |
533 | uint64_t sector; | |
534 | uint32_t num_sectors, flags, max_sectors; | |
535 | uint8_t err_status; | |
536 | int bytes; | |
537 | ||
538 | sector = virtio_ldq_p(vdev, &dwz_hdr->sector); | |
539 | num_sectors = virtio_ldl_p(vdev, &dwz_hdr->num_sectors); | |
540 | flags = virtio_ldl_p(vdev, &dwz_hdr->flags); | |
541 | max_sectors = is_write_zeroes ? s->conf.max_write_zeroes_sectors : | |
542 | s->conf.max_discard_sectors; | |
543 | ||
544 | /* | |
545 | * max_sectors is at most BDRV_REQUEST_MAX_SECTORS, this check | |
546 | * make us sure that "num_sectors << BDRV_SECTOR_BITS" can fit in | |
547 | * the integer variable. | |
548 | */ | |
549 | if (unlikely(num_sectors > max_sectors)) { | |
550 | err_status = VIRTIO_BLK_S_IOERR; | |
551 | goto err; | |
552 | } | |
553 | ||
554 | bytes = num_sectors << BDRV_SECTOR_BITS; | |
555 | ||
556 | if (unlikely(!virtio_blk_sect_range_ok(s, sector, bytes))) { | |
557 | err_status = VIRTIO_BLK_S_IOERR; | |
558 | goto err; | |
559 | } | |
560 | ||
561 | /* | |
562 | * The device MUST set the status byte to VIRTIO_BLK_S_UNSUPP for discard | |
563 | * and write zeroes commands if any unknown flag is set. | |
564 | */ | |
565 | if (unlikely(flags & ~VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP)) { | |
566 | err_status = VIRTIO_BLK_S_UNSUPP; | |
567 | goto err; | |
568 | } | |
569 | ||
570 | if (is_write_zeroes) { /* VIRTIO_BLK_T_WRITE_ZEROES */ | |
571 | int blk_aio_flags = 0; | |
572 | ||
573 | if (flags & VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP) { | |
574 | blk_aio_flags |= BDRV_REQ_MAY_UNMAP; | |
575 | } | |
576 | ||
577 | block_acct_start(blk_get_stats(s->blk), &req->acct, bytes, | |
578 | BLOCK_ACCT_WRITE); | |
579 | ||
580 | blk_aio_pwrite_zeroes(s->blk, sector << BDRV_SECTOR_BITS, | |
581 | bytes, blk_aio_flags, | |
582 | virtio_blk_discard_write_zeroes_complete, req); | |
583 | } else { /* VIRTIO_BLK_T_DISCARD */ | |
584 | /* | |
585 | * The device MUST set the status byte to VIRTIO_BLK_S_UNSUPP for | |
586 | * discard commands if the unmap flag is set. | |
587 | */ | |
588 | if (unlikely(flags & VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP)) { | |
589 | err_status = VIRTIO_BLK_S_UNSUPP; | |
590 | goto err; | |
591 | } | |
592 | ||
593 | blk_aio_pdiscard(s->blk, sector << BDRV_SECTOR_BITS, bytes, | |
594 | virtio_blk_discard_write_zeroes_complete, req); | |
595 | } | |
596 | ||
597 | return VIRTIO_BLK_S_OK; | |
598 | ||
599 | err: | |
600 | if (is_write_zeroes) { | |
601 | block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_WRITE); | |
602 | } | |
603 | return err_status; | |
604 | } | |
605 | ||
4f736650 SL |
606 | typedef struct ZoneCmdData { |
607 | VirtIOBlockReq *req; | |
608 | struct iovec *in_iov; | |
609 | unsigned in_num; | |
610 | union { | |
611 | struct { | |
612 | unsigned int nr_zones; | |
613 | BlockZoneDescriptor *zones; | |
614 | } zone_report_data; | |
615 | struct { | |
616 | int64_t offset; | |
617 | } zone_append_data; | |
618 | }; | |
619 | } ZoneCmdData; | |
620 | ||
621 | /* | |
622 | * check zoned_request: error checking before issuing requests. If all checks | |
623 | * passed, return true. | |
624 | * append: true if only zone append requests issued. | |
625 | */ | |
626 | static bool check_zoned_request(VirtIOBlock *s, int64_t offset, int64_t len, | |
627 | bool append, uint8_t *status) { | |
628 | BlockDriverState *bs = blk_bs(s->blk); | |
629 | int index; | |
630 | ||
631 | if (!virtio_has_feature(s->host_features, VIRTIO_BLK_F_ZONED)) { | |
632 | *status = VIRTIO_BLK_S_UNSUPP; | |
633 | return false; | |
634 | } | |
635 | ||
636 | if (offset < 0 || len < 0 || len > (bs->total_sectors << BDRV_SECTOR_BITS) | |
637 | || offset > (bs->total_sectors << BDRV_SECTOR_BITS) - len) { | |
638 | *status = VIRTIO_BLK_S_ZONE_INVALID_CMD; | |
639 | return false; | |
640 | } | |
641 | ||
642 | if (append) { | |
643 | if (bs->bl.write_granularity) { | |
644 | if ((offset % bs->bl.write_granularity) != 0) { | |
645 | *status = VIRTIO_BLK_S_ZONE_UNALIGNED_WP; | |
646 | return false; | |
647 | } | |
648 | } | |
649 | ||
650 | index = offset / bs->bl.zone_size; | |
651 | if (BDRV_ZT_IS_CONV(bs->wps->wp[index])) { | |
652 | *status = VIRTIO_BLK_S_ZONE_INVALID_CMD; | |
653 | return false; | |
654 | } | |
655 | ||
656 | if (len / 512 > bs->bl.max_append_sectors) { | |
657 | if (bs->bl.max_append_sectors == 0) { | |
658 | *status = VIRTIO_BLK_S_UNSUPP; | |
659 | } else { | |
660 | *status = VIRTIO_BLK_S_ZONE_INVALID_CMD; | |
661 | } | |
662 | return false; | |
663 | } | |
664 | } | |
665 | return true; | |
666 | } | |
667 | ||
668 | static void virtio_blk_zone_report_complete(void *opaque, int ret) | |
669 | { | |
670 | ZoneCmdData *data = opaque; | |
671 | VirtIOBlockReq *req = data->req; | |
672 | VirtIOBlock *s = req->dev; | |
673 | VirtIODevice *vdev = VIRTIO_DEVICE(req->dev); | |
674 | struct iovec *in_iov = data->in_iov; | |
675 | unsigned in_num = data->in_num; | |
676 | int64_t zrp_size, n, j = 0; | |
677 | int64_t nz = data->zone_report_data.nr_zones; | |
678 | int8_t err_status = VIRTIO_BLK_S_OK; | |
679 | ||
4e92acf7 | 680 | trace_virtio_blk_zone_report_complete(vdev, req, nz, ret); |
4f736650 SL |
681 | if (ret) { |
682 | err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; | |
683 | goto out; | |
684 | } | |
685 | ||
686 | struct virtio_blk_zone_report zrp_hdr = (struct virtio_blk_zone_report) { | |
687 | .nr_zones = cpu_to_le64(nz), | |
688 | }; | |
689 | zrp_size = sizeof(struct virtio_blk_zone_report) | |
690 | + sizeof(struct virtio_blk_zone_descriptor) * nz; | |
691 | n = iov_from_buf(in_iov, in_num, 0, &zrp_hdr, sizeof(zrp_hdr)); | |
692 | if (n != sizeof(zrp_hdr)) { | |
693 | virtio_error(vdev, "Driver provided input buffer that is too small!"); | |
694 | err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; | |
695 | goto out; | |
696 | } | |
697 | ||
698 | for (size_t i = sizeof(zrp_hdr); i < zrp_size; | |
699 | i += sizeof(struct virtio_blk_zone_descriptor), ++j) { | |
700 | struct virtio_blk_zone_descriptor desc = | |
701 | (struct virtio_blk_zone_descriptor) { | |
702 | .z_start = cpu_to_le64(data->zone_report_data.zones[j].start | |
703 | >> BDRV_SECTOR_BITS), | |
704 | .z_cap = cpu_to_le64(data->zone_report_data.zones[j].cap | |
705 | >> BDRV_SECTOR_BITS), | |
706 | .z_wp = cpu_to_le64(data->zone_report_data.zones[j].wp | |
707 | >> BDRV_SECTOR_BITS), | |
708 | }; | |
709 | ||
710 | switch (data->zone_report_data.zones[j].type) { | |
711 | case BLK_ZT_CONV: | |
712 | desc.z_type = VIRTIO_BLK_ZT_CONV; | |
713 | break; | |
714 | case BLK_ZT_SWR: | |
715 | desc.z_type = VIRTIO_BLK_ZT_SWR; | |
716 | break; | |
717 | case BLK_ZT_SWP: | |
718 | desc.z_type = VIRTIO_BLK_ZT_SWP; | |
719 | break; | |
720 | default: | |
721 | g_assert_not_reached(); | |
722 | } | |
723 | ||
724 | switch (data->zone_report_data.zones[j].state) { | |
725 | case BLK_ZS_RDONLY: | |
726 | desc.z_state = VIRTIO_BLK_ZS_RDONLY; | |
727 | break; | |
728 | case BLK_ZS_OFFLINE: | |
729 | desc.z_state = VIRTIO_BLK_ZS_OFFLINE; | |
730 | break; | |
731 | case BLK_ZS_EMPTY: | |
732 | desc.z_state = VIRTIO_BLK_ZS_EMPTY; | |
733 | break; | |
734 | case BLK_ZS_CLOSED: | |
735 | desc.z_state = VIRTIO_BLK_ZS_CLOSED; | |
736 | break; | |
737 | case BLK_ZS_FULL: | |
738 | desc.z_state = VIRTIO_BLK_ZS_FULL; | |
739 | break; | |
740 | case BLK_ZS_EOPEN: | |
741 | desc.z_state = VIRTIO_BLK_ZS_EOPEN; | |
742 | break; | |
743 | case BLK_ZS_IOPEN: | |
744 | desc.z_state = VIRTIO_BLK_ZS_IOPEN; | |
745 | break; | |
746 | case BLK_ZS_NOT_WP: | |
747 | desc.z_state = VIRTIO_BLK_ZS_NOT_WP; | |
748 | break; | |
749 | default: | |
750 | g_assert_not_reached(); | |
751 | } | |
752 | ||
753 | /* TODO: it takes O(n^2) time complexity. Optimizations required. */ | |
754 | n = iov_from_buf(in_iov, in_num, i, &desc, sizeof(desc)); | |
755 | if (n != sizeof(desc)) { | |
756 | virtio_error(vdev, "Driver provided input buffer " | |
757 | "for descriptors that is too small!"); | |
758 | err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; | |
759 | } | |
760 | } | |
761 | ||
762 | out: | |
763 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); | |
764 | virtio_blk_req_complete(req, err_status); | |
765 | virtio_blk_free_request(req); | |
766 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); | |
767 | g_free(data->zone_report_data.zones); | |
768 | g_free(data); | |
769 | } | |
770 | ||
771 | static void virtio_blk_handle_zone_report(VirtIOBlockReq *req, | |
772 | struct iovec *in_iov, | |
773 | unsigned in_num) | |
774 | { | |
775 | VirtIOBlock *s = req->dev; | |
776 | VirtIODevice *vdev = VIRTIO_DEVICE(s); | |
777 | unsigned int nr_zones; | |
778 | ZoneCmdData *data; | |
779 | int64_t zone_size, offset; | |
780 | uint8_t err_status; | |
781 | ||
782 | if (req->in_len < sizeof(struct virtio_blk_inhdr) + | |
783 | sizeof(struct virtio_blk_zone_report) + | |
784 | sizeof(struct virtio_blk_zone_descriptor)) { | |
785 | virtio_error(vdev, "in buffer too small for zone report"); | |
786 | return; | |
787 | } | |
788 | ||
789 | /* start byte offset of the zone report */ | |
790 | offset = virtio_ldq_p(vdev, &req->out.sector) << BDRV_SECTOR_BITS; | |
791 | if (!check_zoned_request(s, offset, 0, false, &err_status)) { | |
792 | goto out; | |
793 | } | |
794 | nr_zones = (req->in_len - sizeof(struct virtio_blk_inhdr) - | |
795 | sizeof(struct virtio_blk_zone_report)) / | |
796 | sizeof(struct virtio_blk_zone_descriptor); | |
4e92acf7 SL |
797 | trace_virtio_blk_handle_zone_report(vdev, req, |
798 | offset >> BDRV_SECTOR_BITS, nr_zones); | |
4f736650 SL |
799 | |
800 | zone_size = sizeof(BlockZoneDescriptor) * nr_zones; | |
801 | data = g_malloc(sizeof(ZoneCmdData)); | |
802 | data->req = req; | |
803 | data->in_iov = in_iov; | |
804 | data->in_num = in_num; | |
805 | data->zone_report_data.nr_zones = nr_zones; | |
806 | data->zone_report_data.zones = g_malloc(zone_size), | |
807 | ||
808 | blk_aio_zone_report(s->blk, offset, &data->zone_report_data.nr_zones, | |
809 | data->zone_report_data.zones, | |
810 | virtio_blk_zone_report_complete, data); | |
811 | return; | |
812 | out: | |
813 | virtio_blk_req_complete(req, err_status); | |
814 | virtio_blk_free_request(req); | |
815 | } | |
816 | ||
817 | static void virtio_blk_zone_mgmt_complete(void *opaque, int ret) | |
818 | { | |
819 | VirtIOBlockReq *req = opaque; | |
820 | VirtIOBlock *s = req->dev; | |
4e92acf7 | 821 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
4f736650 | 822 | int8_t err_status = VIRTIO_BLK_S_OK; |
4e92acf7 | 823 | trace_virtio_blk_zone_mgmt_complete(vdev, req,ret); |
4f736650 SL |
824 | |
825 | if (ret) { | |
826 | err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; | |
827 | } | |
828 | ||
829 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); | |
830 | virtio_blk_req_complete(req, err_status); | |
831 | virtio_blk_free_request(req); | |
832 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); | |
833 | } | |
834 | ||
835 | static int virtio_blk_handle_zone_mgmt(VirtIOBlockReq *req, BlockZoneOp op) | |
836 | { | |
837 | VirtIOBlock *s = req->dev; | |
838 | VirtIODevice *vdev = VIRTIO_DEVICE(s); | |
839 | BlockDriverState *bs = blk_bs(s->blk); | |
840 | int64_t offset = virtio_ldq_p(vdev, &req->out.sector) << BDRV_SECTOR_BITS; | |
841 | uint64_t len; | |
842 | uint64_t capacity = bs->total_sectors << BDRV_SECTOR_BITS; | |
843 | uint8_t err_status = VIRTIO_BLK_S_OK; | |
844 | ||
845 | uint32_t type = virtio_ldl_p(vdev, &req->out.type); | |
846 | if (type == VIRTIO_BLK_T_ZONE_RESET_ALL) { | |
847 | /* Entire drive capacity */ | |
848 | offset = 0; | |
849 | len = capacity; | |
4e92acf7 SL |
850 | trace_virtio_blk_handle_zone_reset_all(vdev, req, 0, |
851 | bs->total_sectors); | |
4f736650 SL |
852 | } else { |
853 | if (bs->bl.zone_size > capacity - offset) { | |
854 | /* The zoned device allows the last smaller zone. */ | |
855 | len = capacity - bs->bl.zone_size * (bs->bl.nr_zones - 1); | |
856 | } else { | |
857 | len = bs->bl.zone_size; | |
858 | } | |
4e92acf7 SL |
859 | trace_virtio_blk_handle_zone_mgmt(vdev, req, op, |
860 | offset >> BDRV_SECTOR_BITS, | |
861 | len >> BDRV_SECTOR_BITS); | |
4f736650 SL |
862 | } |
863 | ||
864 | if (!check_zoned_request(s, offset, len, false, &err_status)) { | |
865 | goto out; | |
866 | } | |
867 | ||
868 | blk_aio_zone_mgmt(s->blk, op, offset, len, | |
869 | virtio_blk_zone_mgmt_complete, req); | |
870 | ||
871 | return 0; | |
872 | out: | |
873 | virtio_blk_req_complete(req, err_status); | |
874 | virtio_blk_free_request(req); | |
875 | return err_status; | |
876 | } | |
877 | ||
878 | static void virtio_blk_zone_append_complete(void *opaque, int ret) | |
879 | { | |
880 | ZoneCmdData *data = opaque; | |
881 | VirtIOBlockReq *req = data->req; | |
882 | VirtIOBlock *s = req->dev; | |
883 | VirtIODevice *vdev = VIRTIO_DEVICE(req->dev); | |
884 | int64_t append_sector, n; | |
885 | uint8_t err_status = VIRTIO_BLK_S_OK; | |
886 | ||
887 | if (ret) { | |
888 | err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; | |
889 | goto out; | |
890 | } | |
891 | ||
892 | virtio_stq_p(vdev, &append_sector, | |
893 | data->zone_append_data.offset >> BDRV_SECTOR_BITS); | |
894 | n = iov_from_buf(data->in_iov, data->in_num, 0, &append_sector, | |
895 | sizeof(append_sector)); | |
896 | if (n != sizeof(append_sector)) { | |
897 | virtio_error(vdev, "Driver provided input buffer less than size of " | |
898 | "append_sector"); | |
899 | err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; | |
900 | goto out; | |
901 | } | |
4e92acf7 | 902 | trace_virtio_blk_zone_append_complete(vdev, req, append_sector, ret); |
4f736650 SL |
903 | |
904 | out: | |
905 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); | |
906 | virtio_blk_req_complete(req, err_status); | |
907 | virtio_blk_free_request(req); | |
908 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); | |
909 | g_free(data); | |
910 | } | |
911 | ||
912 | static int virtio_blk_handle_zone_append(VirtIOBlockReq *req, | |
913 | struct iovec *out_iov, | |
914 | struct iovec *in_iov, | |
915 | uint64_t out_num, | |
916 | unsigned in_num) { | |
917 | VirtIOBlock *s = req->dev; | |
918 | VirtIODevice *vdev = VIRTIO_DEVICE(s); | |
919 | uint8_t err_status = VIRTIO_BLK_S_OK; | |
920 | ||
921 | int64_t offset = virtio_ldq_p(vdev, &req->out.sector) << BDRV_SECTOR_BITS; | |
922 | int64_t len = iov_size(out_iov, out_num); | |
923 | ||
4e92acf7 | 924 | trace_virtio_blk_handle_zone_append(vdev, req, offset >> BDRV_SECTOR_BITS); |
4f736650 SL |
925 | if (!check_zoned_request(s, offset, len, true, &err_status)) { |
926 | goto out; | |
927 | } | |
928 | ||
929 | ZoneCmdData *data = g_malloc(sizeof(ZoneCmdData)); | |
930 | data->req = req; | |
931 | data->in_iov = in_iov; | |
932 | data->in_num = in_num; | |
933 | data->zone_append_data.offset = offset; | |
934 | qemu_iovec_init_external(&req->qiov, out_iov, out_num); | |
52eb76f4 SL |
935 | |
936 | block_acct_start(blk_get_stats(s->blk), &req->acct, len, | |
937 | BLOCK_ACCT_ZONE_APPEND); | |
938 | ||
4f736650 SL |
939 | blk_aio_zone_append(s->blk, &data->zone_append_data.offset, &req->qiov, 0, |
940 | virtio_blk_zone_append_complete, data); | |
941 | return 0; | |
942 | ||
943 | out: | |
944 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); | |
945 | virtio_blk_req_complete(req, err_status); | |
946 | virtio_blk_free_request(req); | |
947 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); | |
948 | return err_status; | |
949 | } | |
950 | ||
20ea686a | 951 | static int virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb) |
bc6694d4 | 952 | { |
92e3c2a3 | 953 | uint32_t type; |
f897bf75 | 954 | struct iovec *in_iov = req->elem.in_sg; |
5636da76 | 955 | struct iovec *out_iov = req->elem.out_sg; |
f897bf75 SH |
956 | unsigned in_num = req->elem.in_num; |
957 | unsigned out_num = req->elem.out_num; | |
20ea686a GK |
958 | VirtIOBlock *s = req->dev; |
959 | VirtIODevice *vdev = VIRTIO_DEVICE(s); | |
92e3c2a3 | 960 | |
f897bf75 | 961 | if (req->elem.out_num < 1 || req->elem.in_num < 1) { |
20ea686a GK |
962 | virtio_error(vdev, "virtio-blk missing headers"); |
963 | return -1; | |
bc6694d4 KW |
964 | } |
965 | ||
5636da76 | 966 | if (unlikely(iov_to_buf(out_iov, out_num, 0, &req->out, |
827805a2 | 967 | sizeof(req->out)) != sizeof(req->out))) { |
20ea686a GK |
968 | virtio_error(vdev, "virtio-blk request outhdr too short"); |
969 | return -1; | |
827805a2 | 970 | } |
ee17e848 | 971 | |
7bd04a04 SH |
972 | iov_discard_front_undoable(&out_iov, &out_num, sizeof(req->out), |
973 | &req->outhdr_undo); | |
ee17e848 | 974 | |
12048545 | 975 | if (in_iov[in_num - 1].iov_len < sizeof(struct virtio_blk_inhdr)) { |
20ea686a | 976 | virtio_error(vdev, "virtio-blk request inhdr too short"); |
7bd04a04 | 977 | iov_discard_undo(&req->outhdr_undo); |
20ea686a | 978 | return -1; |
ee17e848 FZ |
979 | } |
980 | ||
2a6cdd6d PB |
981 | /* We always touch the last byte, so just see how big in_iov is. */ |
982 | req->in_len = iov_size(in_iov, in_num); | |
ee17e848 FZ |
983 | req->in = (void *)in_iov[in_num - 1].iov_base |
984 | + in_iov[in_num - 1].iov_len | |
985 | - sizeof(struct virtio_blk_inhdr); | |
7bd04a04 SH |
986 | iov_discard_back_undoable(in_iov, &in_num, sizeof(struct virtio_blk_inhdr), |
987 | &req->inhdr_undo); | |
bc6694d4 | 988 | |
9a6719d5 | 989 | type = virtio_ldl_p(vdev, &req->out.type); |
92e3c2a3 | 990 | |
95f7142a | 991 | /* VIRTIO_BLK_T_OUT defines the command direction. VIRTIO_BLK_T_BARRIER |
631b22ea | 992 | * is an optional flag. Although a guest should not send this flag if |
95f7142a PL |
993 | * not negotiated we ignored it in the past. So keep ignoring it. */ |
994 | switch (type & ~(VIRTIO_BLK_T_OUT | VIRTIO_BLK_T_BARRIER)) { | |
995 | case VIRTIO_BLK_T_IN: | |
996 | { | |
997 | bool is_write = type & VIRTIO_BLK_T_OUT; | |
9a6719d5 | 998 | req->sector_num = virtio_ldq_p(vdev, &req->out.sector); |
95f7142a PL |
999 | |
1000 | if (is_write) { | |
5636da76 | 1001 | qemu_iovec_init_external(&req->qiov, out_iov, out_num); |
a576ceac | 1002 | trace_virtio_blk_handle_write(vdev, req, req->sector_num, |
95f7142a PL |
1003 | req->qiov.size / BDRV_SECTOR_SIZE); |
1004 | } else { | |
1005 | qemu_iovec_init_external(&req->qiov, in_iov, in_num); | |
a576ceac | 1006 | trace_virtio_blk_handle_read(vdev, req, req->sector_num, |
95f7142a PL |
1007 | req->qiov.size / BDRV_SECTOR_SIZE); |
1008 | } | |
1009 | ||
9a6719d5 | 1010 | if (!virtio_blk_sect_range_ok(s, req->sector_num, req->qiov.size)) { |
95f7142a | 1011 | virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); |
9a6719d5 | 1012 | block_acct_invalid(blk_get_stats(s->blk), |
01762e03 | 1013 | is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ); |
95f7142a | 1014 | virtio_blk_free_request(req); |
20ea686a | 1015 | return 0; |
95f7142a PL |
1016 | } |
1017 | ||
9a6719d5 | 1018 | block_acct_start(blk_get_stats(s->blk), &req->acct, req->qiov.size, |
95f7142a PL |
1019 | is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ); |
1020 | ||
1021 | /* merge would exceed maximum number of requests or IO direction | |
1022 | * changes */ | |
1023 | if (mrb->num_reqs > 0 && (mrb->num_reqs == VIRTIO_BLK_MAX_MERGE_REQS || | |
c99495ac | 1024 | is_write != mrb->is_write || |
9a6719d5 | 1025 | !s->conf.request_merging)) { |
baf42268 | 1026 | virtio_blk_submit_multireq(s, mrb); |
95f7142a PL |
1027 | } |
1028 | ||
1029 | assert(mrb->num_reqs < VIRTIO_BLK_MAX_MERGE_REQS); | |
1030 | mrb->reqs[mrb->num_reqs++] = req; | |
1031 | mrb->is_write = is_write; | |
1032 | break; | |
1033 | } | |
1034 | case VIRTIO_BLK_T_FLUSH: | |
c20fd872 | 1035 | virtio_blk_handle_flush(req, mrb); |
95f7142a | 1036 | break; |
4f736650 SL |
1037 | case VIRTIO_BLK_T_ZONE_REPORT: |
1038 | virtio_blk_handle_zone_report(req, in_iov, in_num); | |
1039 | break; | |
1040 | case VIRTIO_BLK_T_ZONE_OPEN: | |
1041 | virtio_blk_handle_zone_mgmt(req, BLK_ZO_OPEN); | |
1042 | break; | |
1043 | case VIRTIO_BLK_T_ZONE_CLOSE: | |
1044 | virtio_blk_handle_zone_mgmt(req, BLK_ZO_CLOSE); | |
1045 | break; | |
1046 | case VIRTIO_BLK_T_ZONE_FINISH: | |
1047 | virtio_blk_handle_zone_mgmt(req, BLK_ZO_FINISH); | |
1048 | break; | |
1049 | case VIRTIO_BLK_T_ZONE_RESET: | |
1050 | virtio_blk_handle_zone_mgmt(req, BLK_ZO_RESET); | |
1051 | break; | |
1052 | case VIRTIO_BLK_T_ZONE_RESET_ALL: | |
1053 | virtio_blk_handle_zone_mgmt(req, BLK_ZO_RESET); | |
1054 | break; | |
95f7142a | 1055 | case VIRTIO_BLK_T_SCSI_CMD: |
bc6694d4 | 1056 | virtio_blk_handle_scsi(req); |
95f7142a PL |
1057 | break; |
1058 | case VIRTIO_BLK_T_GET_ID: | |
1059 | { | |
a8686a9b MA |
1060 | /* |
1061 | * NB: per existing s/n string convention the string is | |
1062 | * terminated by '\0' only when shorter than buffer. | |
1063 | */ | |
2a30307f | 1064 | const char *serial = s->conf.serial ? s->conf.serial : ""; |
a83ceea8 MM |
1065 | size_t size = MIN(strlen(serial) + 1, |
1066 | MIN(iov_size(in_iov, in_num), | |
1067 | VIRTIO_BLK_ID_BYTES)); | |
1068 | iov_from_buf(in_iov, in_num, 0, serial, size); | |
2930b313 | 1069 | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); |
671ec3f0 | 1070 | virtio_blk_free_request(req); |
95f7142a PL |
1071 | break; |
1072 | } | |
4f736650 SL |
1073 | case VIRTIO_BLK_T_ZONE_APPEND & ~VIRTIO_BLK_T_OUT: |
1074 | /* | |
1075 | * Passing out_iov/out_num and in_iov/in_num is not safe | |
1076 | * to access req->elem.out_sg directly because it may be | |
1077 | * modified by virtio_blk_handle_request(). | |
1078 | */ | |
1079 | virtio_blk_handle_zone_append(req, out_iov, in_iov, out_num, in_num); | |
1080 | break; | |
37b06f8d SG |
1081 | /* |
1082 | * VIRTIO_BLK_T_DISCARD and VIRTIO_BLK_T_WRITE_ZEROES are defined with | |
1083 | * VIRTIO_BLK_T_OUT flag set. We masked this flag in the switch statement, | |
1084 | * so we must mask it for these requests, then we will check if it is set. | |
1085 | */ | |
1086 | case VIRTIO_BLK_T_DISCARD & ~VIRTIO_BLK_T_OUT: | |
1087 | case VIRTIO_BLK_T_WRITE_ZEROES & ~VIRTIO_BLK_T_OUT: | |
1088 | { | |
1089 | struct virtio_blk_discard_write_zeroes dwz_hdr; | |
1090 | size_t out_len = iov_size(out_iov, out_num); | |
1091 | bool is_write_zeroes = (type & ~VIRTIO_BLK_T_BARRIER) == | |
1092 | VIRTIO_BLK_T_WRITE_ZEROES; | |
1093 | uint8_t err_status; | |
1094 | ||
1095 | /* | |
1096 | * Unsupported if VIRTIO_BLK_T_OUT is not set or the request contains | |
1097 | * more than one segment. | |
1098 | */ | |
1099 | if (unlikely(!(type & VIRTIO_BLK_T_OUT) || | |
1100 | out_len > sizeof(dwz_hdr))) { | |
1101 | virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); | |
1102 | virtio_blk_free_request(req); | |
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | if (unlikely(iov_to_buf(out_iov, out_num, 0, &dwz_hdr, | |
1107 | sizeof(dwz_hdr)) != sizeof(dwz_hdr))) { | |
7bd04a04 SH |
1108 | iov_discard_undo(&req->inhdr_undo); |
1109 | iov_discard_undo(&req->outhdr_undo); | |
37b06f8d SG |
1110 | virtio_error(vdev, "virtio-blk discard/write_zeroes header" |
1111 | " too short"); | |
1112 | return -1; | |
1113 | } | |
1114 | ||
1115 | err_status = virtio_blk_handle_discard_write_zeroes(req, &dwz_hdr, | |
1116 | is_write_zeroes); | |
1117 | if (err_status != VIRTIO_BLK_S_OK) { | |
1118 | virtio_blk_req_complete(req, err_status); | |
1119 | virtio_blk_free_request(req); | |
1120 | } | |
1121 | ||
1122 | break; | |
1123 | } | |
95f7142a | 1124 | default: |
9e72c450 | 1125 | virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); |
671ec3f0 | 1126 | virtio_blk_free_request(req); |
bc6694d4 | 1127 | } |
20ea686a | 1128 | return 0; |
bc6694d4 KW |
1129 | } |
1130 | ||
186b9691 | 1131 | void virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq) |
6e02c38d | 1132 | { |
6e02c38d | 1133 | VirtIOBlockReq *req; |
95f7142a | 1134 | MultiReqBuffer mrb = {}; |
d0435bc5 | 1135 | bool suppress_notifications = virtio_queue_get_notification(vq); |
6e02c38d | 1136 | |
9d456654 | 1137 | aio_context_acquire(blk_get_aio_context(s->blk)); |
ccee48aa | 1138 | defer_call_begin(); |
fc73548e | 1139 | |
9ef9d402 | 1140 | do { |
d0435bc5 SH |
1141 | if (suppress_notifications) { |
1142 | virtio_queue_set_notification(vq, 0); | |
1143 | } | |
9ef9d402 SH |
1144 | |
1145 | while ((req = virtio_blk_get_request(s, vq))) { | |
1146 | if (virtio_blk_handle_request(req, &mrb)) { | |
1147 | virtqueue_detach_element(req->vq, &req->elem, 0); | |
1148 | virtio_blk_free_request(req); | |
1149 | break; | |
1150 | } | |
20ea686a | 1151 | } |
9ef9d402 | 1152 | |
d0435bc5 SH |
1153 | if (suppress_notifications) { |
1154 | virtio_queue_set_notification(vq, 1); | |
1155 | } | |
9ef9d402 | 1156 | } while (!virtio_queue_empty(vq)); |
91553dcc | 1157 | |
95f7142a | 1158 | if (mrb.num_reqs) { |
baf42268 | 1159 | virtio_blk_submit_multireq(s, &mrb); |
95f7142a | 1160 | } |
fc73548e | 1161 | |
ccee48aa | 1162 | defer_call_end(); |
9d456654 | 1163 | aio_context_release(blk_get_aio_context(s->blk)); |
6e02c38d AL |
1164 | } |
1165 | ||
8a2fad57 MT |
1166 | static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq) |
1167 | { | |
1168 | VirtIOBlock *s = (VirtIOBlock *)vdev; | |
1169 | ||
186b9691 | 1170 | if (s->dataplane && !s->dataplane_started) { |
8a2fad57 MT |
1171 | /* Some guests kick before setting VIRTIO_CONFIG_S_DRIVER_OK so start |
1172 | * dataplane here instead of waiting for .set_status(). | |
1173 | */ | |
9ffe337c | 1174 | virtio_device_start_ioeventfd(vdev); |
8a2fad57 MT |
1175 | if (!s->dataplane_disabled) { |
1176 | return; | |
1177 | } | |
1178 | } | |
186b9691 | 1179 | virtio_blk_handle_vq(s, vq); |
8a2fad57 MT |
1180 | } |
1181 | ||
a937f8e8 | 1182 | static void virtio_blk_dma_restart_bh(void *opaque) |
869a5c6d | 1183 | { |
a937f8e8 SH |
1184 | VirtIOBlock *s = opaque; |
1185 | ||
869a5c6d | 1186 | VirtIOBlockReq *req = s->rq; |
95f7142a | 1187 | MultiReqBuffer mrb = {}; |
869a5c6d | 1188 | |
869a5c6d AL |
1189 | s->rq = NULL; |
1190 | ||
1919631e | 1191 | aio_context_acquire(blk_get_aio_context(s->conf.conf.blk)); |
869a5c6d | 1192 | while (req) { |
1bdb176a | 1193 | VirtIOBlockReq *next = req->next; |
20ea686a GK |
1194 | if (virtio_blk_handle_request(req, &mrb)) { |
1195 | /* Device is now broken and won't do any processing until it gets | |
1196 | * reset. Already queued requests will be lost: let's purge them. | |
1197 | */ | |
1198 | while (req) { | |
1199 | next = req->next; | |
1200 | virtqueue_detach_element(req->vq, &req->elem, 0); | |
1201 | virtio_blk_free_request(req); | |
1202 | req = next; | |
1203 | } | |
1204 | break; | |
1205 | } | |
1bdb176a | 1206 | req = next; |
869a5c6d | 1207 | } |
f1b52868 | 1208 | |
95f7142a | 1209 | if (mrb.num_reqs) { |
baf42268 | 1210 | virtio_blk_submit_multireq(s, &mrb); |
95f7142a | 1211 | } |
7aa1c247 | 1212 | |
a937f8e8 SH |
1213 | /* Paired with inc in virtio_blk_dma_restart_cb() */ |
1214 | blk_dec_in_flight(s->conf.conf.blk); | |
7aa1c247 | 1215 | |
a937f8e8 | 1216 | aio_context_release(blk_get_aio_context(s->conf.conf.blk)); |
7aa1c247 SL |
1217 | } |
1218 | ||
538f0497 | 1219 | static void virtio_blk_dma_restart_cb(void *opaque, bool running, |
1dfb4dd9 | 1220 | RunState state) |
213189ab MA |
1221 | { |
1222 | VirtIOBlock *s = opaque; | |
1223 | ||
392808b4 | 1224 | if (!running) { |
213189ab | 1225 | return; |
392808b4 | 1226 | } |
213189ab | 1227 | |
a937f8e8 SH |
1228 | /* Paired with dec in virtio_blk_dma_restart_bh() */ |
1229 | blk_inc_in_flight(s->conf.conf.blk); | |
1230 | ||
1231 | aio_bh_schedule_oneshot(blk_get_aio_context(s->conf.conf.blk), | |
1232 | virtio_blk_dma_restart_bh, s); | |
213189ab MA |
1233 | } |
1234 | ||
6e02c38d AL |
1235 | static void virtio_blk_reset(VirtIODevice *vdev) |
1236 | { | |
1cc91b7d | 1237 | VirtIOBlock *s = VIRTIO_BLK(vdev); |
6e40b3bf | 1238 | AioContext *ctx; |
26307f6a | 1239 | VirtIOBlockReq *req; |
392808b4 | 1240 | |
6e40b3bf AY |
1241 | ctx = blk_get_aio_context(s->blk); |
1242 | aio_context_acquire(ctx); | |
1243 | blk_drain(s->blk); | |
1244 | ||
26307f6a FZ |
1245 | /* We drop queued requests after blk_drain() because blk_drain() itself can |
1246 | * produce them. */ | |
1247 | while (s->rq) { | |
1248 | req = s->rq; | |
1249 | s->rq = req->next; | |
97b93c8a | 1250 | virtqueue_detach_element(req->vq, &req->elem, 0); |
26307f6a FZ |
1251 | virtio_blk_free_request(req); |
1252 | } | |
1253 | ||
6e40b3bf AY |
1254 | aio_context_release(ctx); |
1255 | ||
9ffe337c | 1256 | assert(!s->dataplane_started); |
4be74634 | 1257 | blk_set_enable_write_cache(s->blk, s->original_wce); |
6e02c38d AL |
1258 | } |
1259 | ||
bf011293 | 1260 | /* coalesce internal state, copy to pci i/o region 0 |
1261 | */ | |
6e02c38d AL |
1262 | static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config) |
1263 | { | |
1cc91b7d | 1264 | VirtIOBlock *s = VIRTIO_BLK(vdev); |
2a30307f | 1265 | BlockConf *conf = &s->conf.conf; |
4f736650 | 1266 | BlockDriverState *bs = blk_bs(s->blk); |
6e02c38d AL |
1267 | struct virtio_blk_config blkcfg; |
1268 | uint64_t capacity; | |
17d0bc01 | 1269 | int64_t length; |
f7516731 | 1270 | int blk_size = conf->logical_block_size; |
1f433e84 EGE |
1271 | AioContext *ctx; |
1272 | ||
1273 | ctx = blk_get_aio_context(s->blk); | |
1274 | aio_context_acquire(ctx); | |
6e02c38d | 1275 | |
4be74634 | 1276 | blk_get_geometry(s->blk, &capacity); |
5c5dafdc | 1277 | memset(&blkcfg, 0, sizeof(blkcfg)); |
783d1897 | 1278 | virtio_stq_p(vdev, &blkcfg.capacity, capacity); |
1bf8a989 DP |
1279 | virtio_stl_p(vdev, &blkcfg.seg_max, |
1280 | s->conf.seg_max_adjust ? s->conf.queue_size - 2 : 128 - 2); | |
907eb3e5 | 1281 | virtio_stw_p(vdev, &blkcfg.geometry.cylinders, conf->cyls); |
783d1897 | 1282 | virtio_stl_p(vdev, &blkcfg.blk_size, blk_size); |
f7516731 | 1283 | virtio_stw_p(vdev, &blkcfg.min_io_size, conf->min_io_size / blk_size); |
6abee260 | 1284 | virtio_stl_p(vdev, &blkcfg.opt_io_size, conf->opt_io_size / blk_size); |
907eb3e5 | 1285 | blkcfg.geometry.heads = conf->heads; |
136be99e CB |
1286 | /* |
1287 | * We must ensure that the block device capacity is a multiple of | |
e03ba136 | 1288 | * the logical block size. If that is not the case, let's use |
136be99e CB |
1289 | * sector_mask to adopt the geometry to have a correct picture. |
1290 | * For those devices where the capacity is ok for the given geometry | |
e03ba136 | 1291 | * we don't touch the sector value of the geometry, since some devices |
136be99e CB |
1292 | * (like s390 dasd) need a specific value. Here the capacity is already |
1293 | * cyls*heads*secs*blk_size and the sector value is not block size | |
1294 | * divided by 512 - instead it is the amount of blk_size blocks | |
1295 | * per track (cylinder). | |
1296 | */ | |
17d0bc01 | 1297 | length = blk_getlength(s->blk); |
1f433e84 | 1298 | aio_context_release(ctx); |
17d0bc01 | 1299 | if (length > 0 && length / conf->heads / conf->secs % blk_size) { |
907eb3e5 | 1300 | blkcfg.geometry.sectors = conf->secs & ~s->sector_mask; |
136be99e | 1301 | } else { |
907eb3e5 | 1302 | blkcfg.geometry.sectors = conf->secs; |
136be99e | 1303 | } |
c7085da7 | 1304 | blkcfg.size_max = 0; |
f7516731 | 1305 | blkcfg.physical_block_exp = get_physical_block_exp(conf); |
9752c371 | 1306 | blkcfg.alignment_offset = 0; |
4be74634 | 1307 | blkcfg.wce = blk_enable_write_cache(s->blk); |
2f270590 | 1308 | virtio_stw_p(vdev, &blkcfg.num_queues, s->conf.num_queues); |
37b06f8d | 1309 | if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_DISCARD)) { |
fb0b154c AO |
1310 | uint32_t discard_granularity = conf->discard_granularity; |
1311 | if (discard_granularity == -1 || !s->conf.report_discard_granularity) { | |
1312 | discard_granularity = blk_size; | |
1313 | } | |
37b06f8d SG |
1314 | virtio_stl_p(vdev, &blkcfg.max_discard_sectors, |
1315 | s->conf.max_discard_sectors); | |
1316 | virtio_stl_p(vdev, &blkcfg.discard_sector_alignment, | |
fb0b154c | 1317 | discard_granularity >> BDRV_SECTOR_BITS); |
37b06f8d SG |
1318 | /* |
1319 | * We support only one segment per request since multiple segments | |
1320 | * are not widely used and there are no userspace APIs that allow | |
1321 | * applications to submit multiple segments in a single call. | |
1322 | */ | |
1323 | virtio_stl_p(vdev, &blkcfg.max_discard_seg, 1); | |
1324 | } | |
1325 | if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_WRITE_ZEROES)) { | |
1326 | virtio_stl_p(vdev, &blkcfg.max_write_zeroes_sectors, | |
1327 | s->conf.max_write_zeroes_sectors); | |
1328 | blkcfg.write_zeroes_may_unmap = 1; | |
1329 | virtio_stl_p(vdev, &blkcfg.max_write_zeroes_seg, 1); | |
1330 | } | |
4f736650 SL |
1331 | if (bs->bl.zoned != BLK_Z_NONE) { |
1332 | switch (bs->bl.zoned) { | |
1333 | case BLK_Z_HM: | |
1334 | blkcfg.zoned.model = VIRTIO_BLK_Z_HM; | |
1335 | break; | |
1336 | case BLK_Z_HA: | |
1337 | blkcfg.zoned.model = VIRTIO_BLK_Z_HA; | |
1338 | break; | |
1339 | default: | |
1340 | g_assert_not_reached(); | |
1341 | } | |
1342 | ||
1343 | virtio_stl_p(vdev, &blkcfg.zoned.zone_sectors, | |
1344 | bs->bl.zone_size / 512); | |
1345 | virtio_stl_p(vdev, &blkcfg.zoned.max_active_zones, | |
1346 | bs->bl.max_active_zones); | |
1347 | virtio_stl_p(vdev, &blkcfg.zoned.max_open_zones, | |
1348 | bs->bl.max_open_zones); | |
1349 | virtio_stl_p(vdev, &blkcfg.zoned.write_granularity, blk_size); | |
1350 | virtio_stl_p(vdev, &blkcfg.zoned.max_append_sectors, | |
1351 | bs->bl.max_append_sectors); | |
1352 | } else { | |
1353 | blkcfg.zoned.model = VIRTIO_BLK_Z_NONE; | |
1354 | } | |
20764be0 | 1355 | memcpy(config, &blkcfg, s->config_size); |
6e02c38d AL |
1356 | } |
1357 | ||
13e3dce0 PB |
1358 | static void virtio_blk_set_config(VirtIODevice *vdev, const uint8_t *config) |
1359 | { | |
1cc91b7d | 1360 | VirtIOBlock *s = VIRTIO_BLK(vdev); |
13e3dce0 PB |
1361 | struct virtio_blk_config blkcfg; |
1362 | ||
20764be0 | 1363 | memcpy(&blkcfg, config, s->config_size); |
6d7e73d6 | 1364 | |
4be74634 MA |
1365 | aio_context_acquire(blk_get_aio_context(s->blk)); |
1366 | blk_set_enable_write_cache(s->blk, blkcfg.wce != 0); | |
1367 | aio_context_release(blk_get_aio_context(s->blk)); | |
13e3dce0 PB |
1368 | } |
1369 | ||
9d5b731d JW |
1370 | static uint64_t virtio_blk_get_features(VirtIODevice *vdev, uint64_t features, |
1371 | Error **errp) | |
6e02c38d | 1372 | { |
1cc91b7d | 1373 | VirtIOBlock *s = VIRTIO_BLK(vdev); |
1063b8b1 | 1374 | |
bbe8bd4d SG |
1375 | /* Firstly sync all virtio-blk possible supported features */ |
1376 | features |= s->host_features; | |
1377 | ||
0cd09c3a CH |
1378 | virtio_add_feature(&features, VIRTIO_BLK_F_SEG_MAX); |
1379 | virtio_add_feature(&features, VIRTIO_BLK_F_GEOMETRY); | |
1380 | virtio_add_feature(&features, VIRTIO_BLK_F_TOPOLOGY); | |
1381 | virtio_add_feature(&features, VIRTIO_BLK_F_BLK_SIZE); | |
95129d6f | 1382 | if (virtio_has_feature(features, VIRTIO_F_VERSION_1)) { |
bbe8bd4d | 1383 | if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_SCSI)) { |
efb8206c JW |
1384 | error_setg(errp, "Please set scsi=off for virtio-blk devices in order to use virtio 1.0"); |
1385 | return 0; | |
1386 | } | |
efb8206c | 1387 | } else { |
c9b11f97 | 1388 | virtio_clear_feature(&features, VIRTIO_F_ANY_LAYOUT); |
efb8206c JW |
1389 | virtio_add_feature(&features, VIRTIO_BLK_F_SCSI); |
1390 | } | |
aa659be3 | 1391 | |
5f258577 EY |
1392 | if (blk_enable_write_cache(s->blk) || |
1393 | (s->conf.x_enable_wce_if_config_wce && | |
1394 | virtio_has_feature(features, VIRTIO_BLK_F_CONFIG_WCE))) { | |
0cd09c3a | 1395 | virtio_add_feature(&features, VIRTIO_BLK_F_WCE); |
4be74634 | 1396 | } |
86b1cf32 | 1397 | if (!blk_is_writable(s->blk)) { |
0cd09c3a | 1398 | virtio_add_feature(&features, VIRTIO_BLK_F_RO); |
4be74634 | 1399 | } |
2f270590 SH |
1400 | if (s->conf.num_queues > 1) { |
1401 | virtio_add_feature(&features, VIRTIO_BLK_F_MQ); | |
1402 | } | |
1063b8b1 CH |
1403 | |
1404 | return features; | |
6e02c38d AL |
1405 | } |
1406 | ||
9315cbfd PB |
1407 | static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status) |
1408 | { | |
1cc91b7d | 1409 | VirtIOBlock *s = VIRTIO_BLK(vdev); |
9315cbfd | 1410 | |
9ffe337c PB |
1411 | if (!(status & (VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_DRIVER_OK))) { |
1412 | assert(!s->dataplane_started); | |
392808b4 | 1413 | } |
392808b4 | 1414 | |
9315cbfd PB |
1415 | if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
1416 | return; | |
1417 | } | |
1418 | ||
ef5bc962 PB |
1419 | /* A guest that supports VIRTIO_BLK_F_CONFIG_WCE must be able to send |
1420 | * cache flushes. Thus, the "auto writethrough" behavior is never | |
1421 | * necessary for guests that support the VIRTIO_BLK_F_CONFIG_WCE feature. | |
1422 | * Leaving it enabled would break the following sequence: | |
1423 | * | |
1424 | * Guest started with "-drive cache=writethrough" | |
1425 | * Guest sets status to 0 | |
1426 | * Guest sets DRIVER bit in status field | |
1427 | * Guest reads host features (WCE=0, CONFIG_WCE=1) | |
1428 | * Guest writes guest features (WCE=0, CONFIG_WCE=1) | |
1429 | * Guest writes 1 to the WCE configuration field (writeback mode) | |
1430 | * Guest sets DRIVER_OK bit in status field | |
1431 | * | |
4be74634 | 1432 | * s->blk would erroneously be placed in writethrough mode. |
ef5bc962 | 1433 | */ |
95129d6f | 1434 | if (!virtio_vdev_has_feature(vdev, VIRTIO_BLK_F_CONFIG_WCE)) { |
4be74634 MA |
1435 | aio_context_acquire(blk_get_aio_context(s->blk)); |
1436 | blk_set_enable_write_cache(s->blk, | |
95129d6f CH |
1437 | virtio_vdev_has_feature(vdev, |
1438 | VIRTIO_BLK_F_WCE)); | |
4be74634 | 1439 | aio_context_release(blk_get_aio_context(s->blk)); |
ef5bc962 | 1440 | } |
9315cbfd PB |
1441 | } |
1442 | ||
b2b295a7 GK |
1443 | static void virtio_blk_save_device(VirtIODevice *vdev, QEMUFile *f) |
1444 | { | |
1445 | VirtIOBlock *s = VIRTIO_BLK(vdev); | |
1446 | VirtIOBlockReq *req = s->rq; | |
1447 | ||
869a5c6d AL |
1448 | while (req) { |
1449 | qemu_put_sbyte(f, 1); | |
30d8bf6d SH |
1450 | |
1451 | if (s->conf.num_queues > 1) { | |
1452 | qemu_put_be32(f, virtio_get_queue_index(req->vq)); | |
1453 | } | |
1454 | ||
86044b24 | 1455 | qemu_put_virtqueue_element(vdev, f, &req->elem); |
869a5c6d AL |
1456 | req = req->next; |
1457 | } | |
1458 | qemu_put_sbyte(f, 0); | |
6e02c38d AL |
1459 | } |
1460 | ||
b2b295a7 GK |
1461 | static int virtio_blk_load_device(VirtIODevice *vdev, QEMUFile *f, |
1462 | int version_id) | |
1463 | { | |
1464 | VirtIOBlock *s = VIRTIO_BLK(vdev); | |
2a633c46 | 1465 | |
869a5c6d | 1466 | while (qemu_get_sbyte(f)) { |
30d8bf6d SH |
1467 | unsigned nvqs = s->conf.num_queues; |
1468 | unsigned vq_idx = 0; | |
ab281c17 | 1469 | VirtIOBlockReq *req; |
30d8bf6d SH |
1470 | |
1471 | if (nvqs > 1) { | |
1472 | vq_idx = qemu_get_be32(f); | |
1473 | ||
1474 | if (vq_idx >= nvqs) { | |
1475 | error_report("Invalid virtqueue index in request list: %#x", | |
1476 | vq_idx); | |
1477 | return -EINVAL; | |
1478 | } | |
1479 | } | |
1480 | ||
8607f5c3 | 1481 | req = qemu_get_virtqueue_element(vdev, f, sizeof(VirtIOBlockReq)); |
30d8bf6d | 1482 | virtio_blk_init_request(s, virtio_get_queue(vdev, vq_idx), req); |
869a5c6d | 1483 | req->next = s->rq; |
20a81e4d | 1484 | s->rq = req; |
869a5c6d | 1485 | } |
6e02c38d AL |
1486 | |
1487 | return 0; | |
1488 | } | |
1489 | ||
9b92fbcf SL |
1490 | static void virtio_resize_cb(void *opaque) |
1491 | { | |
1492 | VirtIODevice *vdev = opaque; | |
1493 | ||
1494 | assert(qemu_get_current_aio_context() == qemu_get_aio_context()); | |
1495 | virtio_notify_config(vdev); | |
1496 | } | |
1497 | ||
145feb17 | 1498 | static void virtio_blk_resize(void *opaque) |
e5051fc7 | 1499 | { |
1cc91b7d | 1500 | VirtIODevice *vdev = VIRTIO_DEVICE(opaque); |
e5051fc7 | 1501 | |
9b92fbcf SL |
1502 | /* |
1503 | * virtio_notify_config() needs to acquire the global mutex, | |
1504 | * so it can't be called from an iothread. Instead, schedule | |
1505 | * it to be run in the main context BH. | |
1506 | */ | |
1507 | aio_bh_schedule_oneshot(qemu_get_aio_context(), virtio_resize_cb, vdev); | |
e5051fc7 CH |
1508 | } |
1509 | ||
1665d932 SH |
1510 | /* Suspend virtqueue ioeventfd processing during drain */ |
1511 | static void virtio_blk_drained_begin(void *opaque) | |
1512 | { | |
1513 | VirtIOBlock *s = opaque; | |
1514 | VirtIODevice *vdev = VIRTIO_DEVICE(opaque); | |
1515 | AioContext *ctx = blk_get_aio_context(s->conf.conf.blk); | |
1516 | ||
1517 | if (!s->dataplane || !s->dataplane_started) { | |
1518 | return; | |
1519 | } | |
1520 | ||
1521 | for (uint16_t i = 0; i < s->conf.num_queues; i++) { | |
1522 | VirtQueue *vq = virtio_get_queue(vdev, i); | |
1523 | virtio_queue_aio_detach_host_notifier(vq, ctx); | |
1524 | } | |
1525 | } | |
1526 | ||
1527 | /* Resume virtqueue ioeventfd processing after drain */ | |
1528 | static void virtio_blk_drained_end(void *opaque) | |
1529 | { | |
1530 | VirtIOBlock *s = opaque; | |
1531 | VirtIODevice *vdev = VIRTIO_DEVICE(opaque); | |
1532 | AioContext *ctx = blk_get_aio_context(s->conf.conf.blk); | |
1533 | ||
1534 | if (!s->dataplane || !s->dataplane_started) { | |
1535 | return; | |
1536 | } | |
1537 | ||
1538 | for (uint16_t i = 0; i < s->conf.num_queues; i++) { | |
1539 | VirtQueue *vq = virtio_get_queue(vdev, i); | |
1540 | virtio_queue_aio_attach_host_notifier(vq, ctx); | |
1541 | } | |
1542 | } | |
1543 | ||
0e49de52 | 1544 | static const BlockDevOps virtio_block_ops = { |
1665d932 SH |
1545 | .resize_cb = virtio_blk_resize, |
1546 | .drained_begin = virtio_blk_drained_begin, | |
1547 | .drained_end = virtio_blk_drained_end, | |
0e49de52 MA |
1548 | }; |
1549 | ||
75884afd | 1550 | static void virtio_blk_device_realize(DeviceState *dev, Error **errp) |
1c028ddf | 1551 | { |
75884afd | 1552 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
179b417e | 1553 | VirtIOBlock *s = VIRTIO_BLK(dev); |
2a30307f | 1554 | VirtIOBlkConf *conf = &s->conf; |
3ffeeef7 | 1555 | Error *err = NULL; |
2f270590 | 1556 | unsigned i; |
cf21e106 | 1557 | |
4be74634 | 1558 | if (!conf->conf.blk) { |
75884afd AF |
1559 | error_setg(errp, "drive property not set"); |
1560 | return; | |
d75d25e3 | 1561 | } |
4be74634 | 1562 | if (!blk_is_inserted(conf->conf.blk)) { |
75884afd AF |
1563 | error_setg(errp, "Device needs media, but drive is empty"); |
1564 | return; | |
98f28ad7 | 1565 | } |
9445e1e1 SH |
1566 | if (conf->num_queues == VIRTIO_BLK_AUTO_NUM_QUEUES) { |
1567 | conf->num_queues = 1; | |
1568 | } | |
2f270590 SH |
1569 | if (!conf->num_queues) { |
1570 | error_setg(errp, "num-queues property must be larger than 0"); | |
1571 | return; | |
1572 | } | |
1bf8a989 DP |
1573 | if (conf->queue_size <= 2) { |
1574 | error_setg(errp, "invalid queue-size property (%" PRIu16 "), " | |
1575 | "must be > 2", conf->queue_size); | |
1576 | return; | |
1577 | } | |
6040aedd MK |
1578 | if (!is_power_of_2(conf->queue_size) || |
1579 | conf->queue_size > VIRTQUEUE_MAX_SIZE) { | |
1580 | error_setg(errp, "invalid queue-size property (%" PRIu16 "), " | |
1581 | "must be a power of 2 (max %d)", | |
1582 | conf->queue_size, VIRTQUEUE_MAX_SIZE); | |
1583 | return; | |
1584 | } | |
d75d25e3 | 1585 | |
ceff3e1f | 1586 | if (!blkconf_apply_backend_options(&conf->conf, |
86b1cf32 KW |
1587 | !blk_supports_write_perm(conf->conf.blk), |
1588 | true, errp)) { | |
a17c17a2 KW |
1589 | return; |
1590 | } | |
4be74634 | 1591 | s->original_wce = blk_enable_write_cache(conf->conf.blk); |
ceff3e1f | 1592 | if (!blkconf_geometry(&conf->conf, NULL, 65535, 255, 255, errp)) { |
75884afd | 1593 | return; |
b7eb0c9f | 1594 | } |
ceff3e1f | 1595 | |
c56ee92f | 1596 | if (!blkconf_blocksizes(&conf->conf, errp)) { |
0a75b60c MK |
1597 | return; |
1598 | } | |
1599 | ||
4f736650 SL |
1600 | BlockDriverState *bs = blk_bs(conf->conf.blk); |
1601 | if (bs->bl.zoned != BLK_Z_NONE) { | |
1602 | virtio_add_feature(&s->host_features, VIRTIO_BLK_F_ZONED); | |
1603 | if (bs->bl.zoned == BLK_Z_HM) { | |
1604 | virtio_clear_feature(&s->host_features, VIRTIO_BLK_F_DISCARD); | |
1605 | } | |
1606 | } | |
1607 | ||
37b06f8d SG |
1608 | if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_DISCARD) && |
1609 | (!conf->max_discard_sectors || | |
1610 | conf->max_discard_sectors > BDRV_REQUEST_MAX_SECTORS)) { | |
1611 | error_setg(errp, "invalid max-discard-sectors property (%" PRIu32 ")" | |
1612 | ", must be between 1 and %d", | |
1613 | conf->max_discard_sectors, (int)BDRV_REQUEST_MAX_SECTORS); | |
1614 | return; | |
1615 | } | |
1616 | ||
1617 | if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_WRITE_ZEROES) && | |
1618 | (!conf->max_write_zeroes_sectors || | |
1619 | conf->max_write_zeroes_sectors > BDRV_REQUEST_MAX_SECTORS)) { | |
1620 | error_setg(errp, "invalid max-write-zeroes-sectors property (%" PRIu32 | |
1621 | "), must be between 1 and %d", | |
1622 | conf->max_write_zeroes_sectors, | |
1623 | (int)BDRV_REQUEST_MAX_SECTORS); | |
1624 | return; | |
1625 | } | |
1626 | ||
d9cf55a8 | 1627 | s->config_size = virtio_get_config_size(&virtio_blk_cfg_size_params, |
d74c30c8 | 1628 | s->host_features); |
3857cd5c | 1629 | virtio_init(vdev, VIRTIO_ID_BLOCK, s->config_size); |
6e02c38d | 1630 | |
4be74634 | 1631 | s->blk = conf->conf.blk; |
869a5c6d | 1632 | s->rq = NULL; |
2a30307f | 1633 | s->sector_mask = (s->conf.conf.logical_block_size / BDRV_SECTOR_SIZE) - 1; |
e63e7fde | 1634 | |
2f270590 | 1635 | for (i = 0; i < conf->num_queues; i++) { |
6040aedd | 1636 | virtio_add_queue(vdev, conf->queue_size, virtio_blk_handle_output); |
2f270590 | 1637 | } |
98e3ab35 | 1638 | qemu_coroutine_inc_pool_size(conf->num_queues * conf->queue_size / 2); |
2a30307f | 1639 | virtio_blk_data_plane_create(vdev, conf, &s->dataplane, &err); |
3ffeeef7 | 1640 | if (err != NULL) { |
75884afd | 1641 | error_propagate(errp, err); |
cfaf757e PN |
1642 | for (i = 0; i < conf->num_queues; i++) { |
1643 | virtio_del_queue(vdev, i); | |
1644 | } | |
6a1a8cc7 | 1645 | virtio_cleanup(vdev); |
75884afd | 1646 | return; |
392808b4 | 1647 | } |
6e02c38d | 1648 | |
a937f8e8 SH |
1649 | /* |
1650 | * This must be after virtio_init() so virtio_blk_dma_restart_cb() gets | |
1651 | * called after ->start_ioeventfd() has already set blk's AioContext. | |
1652 | */ | |
1653 | s->change = | |
1654 | qdev_add_vm_change_state_handler(dev, virtio_blk_dma_restart_cb, s); | |
1655 | ||
baf42268 | 1656 | blk_ram_registrar_init(&s->blk_ram_registrar, s->blk); |
4be74634 | 1657 | blk_set_dev_ops(s->blk, &virtio_block_ops, s); |
6e02c38d | 1658 | |
4be74634 | 1659 | blk_iostatus_enable(s->blk); |
71f571a2 SE |
1660 | |
1661 | add_boot_device_lchs(dev, "/disk@0,0", | |
1662 | conf->conf.lcyls, | |
1663 | conf->conf.lheads, | |
1664 | conf->conf.lsecs); | |
1c028ddf FK |
1665 | } |
1666 | ||
b69c3c21 | 1667 | static void virtio_blk_device_unrealize(DeviceState *dev) |
1c028ddf | 1668 | { |
306ec6c3 AF |
1669 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
1670 | VirtIOBlock *s = VIRTIO_BLK(dev); | |
4a0117cf EP |
1671 | VirtIOBlkConf *conf = &s->conf; |
1672 | unsigned i; | |
306ec6c3 | 1673 | |
7bfde688 | 1674 | blk_drain(s->blk); |
71f571a2 | 1675 | del_boot_device_lchs(dev, "/disk@0,0"); |
1c028ddf FK |
1676 | virtio_blk_data_plane_destroy(s->dataplane); |
1677 | s->dataplane = NULL; | |
4a0117cf EP |
1678 | for (i = 0; i < conf->num_queues; i++) { |
1679 | virtio_del_queue(vdev, i); | |
1680 | } | |
98e3ab35 | 1681 | qemu_coroutine_dec_pool_size(conf->num_queues * conf->queue_size / 2); |
baf42268 | 1682 | blk_ram_registrar_destroy(&s->blk_ram_registrar); |
1c028ddf | 1683 | qemu_del_vm_change_state_handler(s->change); |
4be74634 | 1684 | blockdev_mark_auto_del(s->blk); |
6a1a8cc7 | 1685 | virtio_cleanup(vdev); |
1c028ddf FK |
1686 | } |
1687 | ||
467b3f33 SH |
1688 | static void virtio_blk_instance_init(Object *obj) |
1689 | { | |
1690 | VirtIOBlock *s = VIRTIO_BLK(obj); | |
1691 | ||
2a30307f | 1692 | device_add_bootindex_property(obj, &s->conf.conf.bootindex, |
3342ec32 | 1693 | "bootindex", "/disk@0,0", |
40c2281c | 1694 | DEVICE(obj)); |
467b3f33 SH |
1695 | } |
1696 | ||
977a117f HP |
1697 | static const VMStateDescription vmstate_virtio_blk = { |
1698 | .name = "virtio-blk", | |
1699 | .minimum_version_id = 2, | |
1700 | .version_id = 2, | |
1701 | .fields = (VMStateField[]) { | |
1702 | VMSTATE_VIRTIO_DEVICE, | |
1703 | VMSTATE_END_OF_LIST() | |
1704 | }, | |
1705 | }; | |
bbded32c | 1706 | |
1c028ddf | 1707 | static Property virtio_blk_properties[] = { |
2a30307f | 1708 | DEFINE_BLOCK_PROPERTIES(VirtIOBlock, conf.conf), |
8c398252 | 1709 | DEFINE_BLOCK_ERROR_PROPERTIES(VirtIOBlock, conf.conf), |
2a30307f MA |
1710 | DEFINE_BLOCK_CHS_PROPERTIES(VirtIOBlock, conf.conf), |
1711 | DEFINE_PROP_STRING("serial", VirtIOBlock, conf.serial), | |
bbe8bd4d SG |
1712 | DEFINE_PROP_BIT64("config-wce", VirtIOBlock, host_features, |
1713 | VIRTIO_BLK_F_CONFIG_WCE, true), | |
32a877e4 | 1714 | #ifdef __linux__ |
bbe8bd4d SG |
1715 | DEFINE_PROP_BIT64("scsi", VirtIOBlock, host_features, |
1716 | VIRTIO_BLK_F_SCSI, false), | |
32a877e4 | 1717 | #endif |
c99495ac PL |
1718 | DEFINE_PROP_BIT("request-merging", VirtIOBlock, conf.request_merging, 0, |
1719 | true), | |
9445e1e1 SH |
1720 | DEFINE_PROP_UINT16("num-queues", VirtIOBlock, conf.num_queues, |
1721 | VIRTIO_BLK_AUTO_NUM_QUEUES), | |
c9b7d9ec | 1722 | DEFINE_PROP_UINT16("queue-size", VirtIOBlock, conf.queue_size, 256), |
1bf8a989 | 1723 | DEFINE_PROP_BOOL("seg-max-adjust", VirtIOBlock, conf.seg_max_adjust, true), |
d679ac09 FZ |
1724 | DEFINE_PROP_LINK("iothread", VirtIOBlock, conf.iothread, TYPE_IOTHREAD, |
1725 | IOThread *), | |
5c81161f SG |
1726 | DEFINE_PROP_BIT64("discard", VirtIOBlock, host_features, |
1727 | VIRTIO_BLK_F_DISCARD, true), | |
fb0b154c AO |
1728 | DEFINE_PROP_BOOL("report-discard-granularity", VirtIOBlock, |
1729 | conf.report_discard_granularity, true), | |
5c81161f SG |
1730 | DEFINE_PROP_BIT64("write-zeroes", VirtIOBlock, host_features, |
1731 | VIRTIO_BLK_F_WRITE_ZEROES, true), | |
37b06f8d SG |
1732 | DEFINE_PROP_UINT32("max-discard-sectors", VirtIOBlock, |
1733 | conf.max_discard_sectors, BDRV_REQUEST_MAX_SECTORS), | |
1734 | DEFINE_PROP_UINT32("max-write-zeroes-sectors", VirtIOBlock, | |
1735 | conf.max_write_zeroes_sectors, BDRV_REQUEST_MAX_SECTORS), | |
5f258577 EY |
1736 | DEFINE_PROP_BOOL("x-enable-wce-if-config-wce", VirtIOBlock, |
1737 | conf.x_enable_wce_if_config_wce, true), | |
1c028ddf FK |
1738 | DEFINE_PROP_END_OF_LIST(), |
1739 | }; | |
1740 | ||
1741 | static void virtio_blk_class_init(ObjectClass *klass, void *data) | |
1742 | { | |
1743 | DeviceClass *dc = DEVICE_CLASS(klass); | |
1744 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); | |
75884afd | 1745 | |
4f67d30b | 1746 | device_class_set_props(dc, virtio_blk_properties); |
bbded32c | 1747 | dc->vmsd = &vmstate_virtio_blk; |
125ee0ed | 1748 | set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); |
75884afd | 1749 | vdc->realize = virtio_blk_device_realize; |
306ec6c3 | 1750 | vdc->unrealize = virtio_blk_device_unrealize; |
1c028ddf FK |
1751 | vdc->get_config = virtio_blk_update_config; |
1752 | vdc->set_config = virtio_blk_set_config; | |
1753 | vdc->get_features = virtio_blk_get_features; | |
1754 | vdc->set_status = virtio_blk_set_status; | |
1755 | vdc->reset = virtio_blk_reset; | |
b2b295a7 GK |
1756 | vdc->save = virtio_blk_save_device; |
1757 | vdc->load = virtio_blk_load_device; | |
9ffe337c PB |
1758 | vdc->start_ioeventfd = virtio_blk_data_plane_start; |
1759 | vdc->stop_ioeventfd = virtio_blk_data_plane_stop; | |
1c028ddf FK |
1760 | } |
1761 | ||
b5c7ceaf | 1762 | static const TypeInfo virtio_blk_info = { |
1c028ddf FK |
1763 | .name = TYPE_VIRTIO_BLK, |
1764 | .parent = TYPE_VIRTIO_DEVICE, | |
1765 | .instance_size = sizeof(VirtIOBlock), | |
467b3f33 | 1766 | .instance_init = virtio_blk_instance_init, |
1c028ddf FK |
1767 | .class_init = virtio_blk_class_init, |
1768 | }; | |
1769 | ||
1770 | static void virtio_register_types(void) | |
1771 | { | |
b5c7ceaf | 1772 | type_register_static(&virtio_blk_info); |
1c028ddf FK |
1773 | } |
1774 | ||
1775 | type_init(virtio_register_types) |