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