root / hw / virtio-blk.c @ a1bc20df
History | View | Annotate | Download (17.9 kB)
1 | 6e02c38d | aliguori | /*
|
---|---|---|---|
2 | 6e02c38d | aliguori | * Virtio Block Device
|
3 | 6e02c38d | aliguori | *
|
4 | 6e02c38d | aliguori | * Copyright IBM, Corp. 2007
|
5 | 6e02c38d | aliguori | *
|
6 | 6e02c38d | aliguori | * Authors:
|
7 | 6e02c38d | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
|
8 | 6e02c38d | aliguori | *
|
9 | 6e02c38d | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
|
10 | 6e02c38d | aliguori | * the COPYING file in the top-level directory.
|
11 | 6e02c38d | aliguori | *
|
12 | 6e02c38d | aliguori | */
|
13 | 6e02c38d | aliguori | |
14 | 5a61cb60 | Stefan Weil | #include "qemu-common.h" |
15 | d75d25e3 | Markus Armbruster | #include "qemu-error.h" |
16 | 6d519a5f | Stefan Hajnoczi | #include "trace.h" |
17 | 9db1c0f7 | Markus Armbruster | #include "hw/block-common.h" |
18 | 2446333c | Blue Swirl | #include "blockdev.h" |
19 | 6e02c38d | aliguori | #include "virtio-blk.h" |
20 | 5bb23927 | Paolo Bonzini | #include "scsi-defs.h" |
21 | 1063b8b1 | Christoph Hellwig | #ifdef __linux__
|
22 | 1063b8b1 | Christoph Hellwig | # include <scsi/sg.h> |
23 | 1063b8b1 | Christoph Hellwig | #endif
|
24 | 6e02c38d | aliguori | |
25 | 6e02c38d | aliguori | typedef struct VirtIOBlock |
26 | 6e02c38d | aliguori | { |
27 | 6e02c38d | aliguori | VirtIODevice vdev; |
28 | 6e02c38d | aliguori | BlockDriverState *bs; |
29 | 6e02c38d | aliguori | VirtQueue *vq; |
30 | 869a5c6d | aliguori | void *rq;
|
31 | 213189ab | Markus Armbruster | QEMUBH *bh; |
32 | 9752c371 | Christoph Hellwig | BlockConf *conf; |
33 | 12c5674b | Paolo Bonzini | VirtIOBlkConf *blk; |
34 | 8cfacf07 | Christoph Hellwig | unsigned short sector_mask; |
35 | 9d0d3138 | Alex Williamson | DeviceState *qdev; |
36 | 6e02c38d | aliguori | } VirtIOBlock; |
37 | 6e02c38d | aliguori | |
38 | 6e02c38d | aliguori | static VirtIOBlock *to_virtio_blk(VirtIODevice *vdev)
|
39 | 6e02c38d | aliguori | { |
40 | 6e02c38d | aliguori | return (VirtIOBlock *)vdev;
|
41 | 6e02c38d | aliguori | } |
42 | 6e02c38d | aliguori | |
43 | 6e02c38d | aliguori | typedef struct VirtIOBlockReq |
44 | 6e02c38d | aliguori | { |
45 | 6e02c38d | aliguori | VirtIOBlock *dev; |
46 | 6e02c38d | aliguori | VirtQueueElement elem; |
47 | 6e02c38d | aliguori | struct virtio_blk_inhdr *in;
|
48 | 6e02c38d | aliguori | struct virtio_blk_outhdr *out;
|
49 | 1063b8b1 | Christoph Hellwig | struct virtio_scsi_inhdr *scsi;
|
50 | d28a1b6e | aliguori | QEMUIOVector qiov; |
51 | 869a5c6d | aliguori | struct VirtIOBlockReq *next;
|
52 | a597e79c | Christoph Hellwig | BlockAcctCookie acct; |
53 | 6e02c38d | aliguori | } VirtIOBlockReq; |
54 | 6e02c38d | aliguori | |
55 | 869a5c6d | aliguori | static void virtio_blk_req_complete(VirtIOBlockReq *req, int status) |
56 | 869a5c6d | aliguori | { |
57 | 869a5c6d | aliguori | VirtIOBlock *s = req->dev; |
58 | 869a5c6d | aliguori | |
59 | 6d519a5f | Stefan Hajnoczi | trace_virtio_blk_req_complete(req, status); |
60 | 6d519a5f | Stefan Hajnoczi | |
61 | 92e3c2a3 | Aurelien Jarno | stb_p(&req->in->status, status); |
62 | d28a1b6e | aliguori | virtqueue_push(s->vq, &req->elem, req->qiov.size + sizeof(*req->in));
|
63 | 869a5c6d | aliguori | virtio_notify(&s->vdev, s->vq); |
64 | 869a5c6d | aliguori | } |
65 | 869a5c6d | aliguori | |
66 | f35d68f0 | Kevin Wolf | static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error, |
67 | 1ceee0d5 | Paolo Bonzini | bool is_read)
|
68 | 869a5c6d | aliguori | { |
69 | 3e1caa5f | Paolo Bonzini | BlockErrorAction action = bdrv_get_error_action(req->dev->bs, is_read, error); |
70 | 869a5c6d | aliguori | VirtIOBlock *s = req->dev; |
71 | 869a5c6d | aliguori | |
72 | 3e1caa5f | Paolo Bonzini | if (action == BDRV_ACTION_STOP) {
|
73 | 869a5c6d | aliguori | req->next = s->rq; |
74 | 869a5c6d | aliguori | s->rq = req; |
75 | 3e1caa5f | Paolo Bonzini | } else if (action == BDRV_ACTION_REPORT) { |
76 | 869a5c6d | aliguori | virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); |
77 | a597e79c | Christoph Hellwig | bdrv_acct_done(s->bs, &req->acct); |
78 | a597e79c | Christoph Hellwig | g_free(req); |
79 | 869a5c6d | aliguori | } |
80 | 869a5c6d | aliguori | |
81 | 3e1caa5f | Paolo Bonzini | bdrv_error_action(s->bs, action, is_read, error); |
82 | 3e1caa5f | Paolo Bonzini | return action != BDRV_ACTION_IGNORE;
|
83 | 869a5c6d | aliguori | } |
84 | 869a5c6d | aliguori | |
85 | 6e02c38d | aliguori | static void virtio_blk_rw_complete(void *opaque, int ret) |
86 | 6e02c38d | aliguori | { |
87 | 6e02c38d | aliguori | VirtIOBlockReq *req = opaque; |
88 | 6e02c38d | aliguori | |
89 | 6d519a5f | Stefan Hajnoczi | trace_virtio_blk_rw_complete(req, ret); |
90 | 6d519a5f | Stefan Hajnoczi | |
91 | f35d68f0 | Kevin Wolf | if (ret) {
|
92 | 1ceee0d5 | Paolo Bonzini | bool is_read = !(ldl_p(&req->out->type) & VIRTIO_BLK_T_OUT);
|
93 | f35d68f0 | Kevin Wolf | if (virtio_blk_handle_rw_error(req, -ret, is_read))
|
94 | 869a5c6d | aliguori | return;
|
95 | 6e02c38d | aliguori | } |
96 | 6e02c38d | aliguori | |
97 | f35d68f0 | Kevin Wolf | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); |
98 | a597e79c | Christoph Hellwig | bdrv_acct_done(req->dev->bs, &req->acct); |
99 | a597e79c | Christoph Hellwig | g_free(req); |
100 | 869a5c6d | aliguori | } |
101 | 6e02c38d | aliguori | |
102 | aa659be3 | Christoph Hellwig | static void virtio_blk_flush_complete(void *opaque, int ret) |
103 | aa659be3 | Christoph Hellwig | { |
104 | aa659be3 | Christoph Hellwig | VirtIOBlockReq *req = opaque; |
105 | aa659be3 | Christoph Hellwig | |
106 | 8c269b54 | Kevin Wolf | if (ret) {
|
107 | 8c269b54 | Kevin Wolf | if (virtio_blk_handle_rw_error(req, -ret, 0)) { |
108 | 8c269b54 | Kevin Wolf | return;
|
109 | 8c269b54 | Kevin Wolf | } |
110 | 8c269b54 | Kevin Wolf | } |
111 | 8c269b54 | Kevin Wolf | |
112 | 8c269b54 | Kevin Wolf | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); |
113 | a597e79c | Christoph Hellwig | bdrv_acct_done(req->dev->bs, &req->acct); |
114 | a597e79c | Christoph Hellwig | g_free(req); |
115 | aa659be3 | Christoph Hellwig | } |
116 | aa659be3 | Christoph Hellwig | |
117 | 869a5c6d | aliguori | static VirtIOBlockReq *virtio_blk_alloc_request(VirtIOBlock *s)
|
118 | 869a5c6d | aliguori | { |
119 | 7267c094 | Anthony Liguori | VirtIOBlockReq *req = g_malloc(sizeof(*req));
|
120 | 487414f1 | aliguori | req->dev = s; |
121 | de6c8042 | Stefan Hajnoczi | req->qiov.size = 0;
|
122 | de6c8042 | Stefan Hajnoczi | req->next = NULL;
|
123 | 869a5c6d | aliguori | return req;
|
124 | 6e02c38d | aliguori | } |
125 | 6e02c38d | aliguori | |
126 | 6e02c38d | aliguori | static VirtIOBlockReq *virtio_blk_get_request(VirtIOBlock *s)
|
127 | 6e02c38d | aliguori | { |
128 | 869a5c6d | aliguori | VirtIOBlockReq *req = virtio_blk_alloc_request(s); |
129 | 6e02c38d | aliguori | |
130 | 869a5c6d | aliguori | if (req != NULL) { |
131 | 869a5c6d | aliguori | if (!virtqueue_pop(s->vq, &req->elem)) {
|
132 | 7267c094 | Anthony Liguori | g_free(req); |
133 | 869a5c6d | aliguori | return NULL; |
134 | 869a5c6d | aliguori | } |
135 | 6e02c38d | aliguori | } |
136 | 6e02c38d | aliguori | |
137 | 6e02c38d | aliguori | return req;
|
138 | 6e02c38d | aliguori | } |
139 | 6e02c38d | aliguori | |
140 | 1063b8b1 | Christoph Hellwig | static void virtio_blk_handle_scsi(VirtIOBlockReq *req) |
141 | 1063b8b1 | Christoph Hellwig | { |
142 | 47ce9ef7 | Stefan Weil | #ifdef __linux__
|
143 | 4277906d | Christoph Hellwig | int ret;
|
144 | 1063b8b1 | Christoph Hellwig | int i;
|
145 | 47ce9ef7 | Stefan Weil | #endif
|
146 | 47ce9ef7 | Stefan Weil | int status = VIRTIO_BLK_S_OK;
|
147 | 1063b8b1 | Christoph Hellwig | |
148 | 1063b8b1 | Christoph Hellwig | /*
|
149 | 1063b8b1 | Christoph Hellwig | * We require at least one output segment each for the virtio_blk_outhdr
|
150 | 1063b8b1 | Christoph Hellwig | * and the SCSI command block.
|
151 | 1063b8b1 | Christoph Hellwig | *
|
152 | 1063b8b1 | Christoph Hellwig | * We also at least require the virtio_blk_inhdr, the virtio_scsi_inhdr
|
153 | 1063b8b1 | Christoph Hellwig | * and the sense buffer pointer in the input segments.
|
154 | 1063b8b1 | Christoph Hellwig | */
|
155 | 1063b8b1 | Christoph Hellwig | if (req->elem.out_num < 2 || req->elem.in_num < 3) { |
156 | 1063b8b1 | Christoph Hellwig | virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); |
157 | a597e79c | Christoph Hellwig | g_free(req); |
158 | 1063b8b1 | Christoph Hellwig | return;
|
159 | 1063b8b1 | Christoph Hellwig | } |
160 | 1063b8b1 | Christoph Hellwig | |
161 | 1063b8b1 | Christoph Hellwig | /*
|
162 | f34e73cd | Paolo Bonzini | * The scsi inhdr is placed in the second-to-last input segment, just
|
163 | f34e73cd | Paolo Bonzini | * before the regular inhdr.
|
164 | 1063b8b1 | Christoph Hellwig | */
|
165 | f34e73cd | Paolo Bonzini | req->scsi = (void *)req->elem.in_sg[req->elem.in_num - 2].iov_base; |
166 | f34e73cd | Paolo Bonzini | |
167 | a6c5c84a | Paolo Bonzini | if (!req->dev->blk->scsi) {
|
168 | f34e73cd | Paolo Bonzini | status = VIRTIO_BLK_S_UNSUPP; |
169 | f34e73cd | Paolo Bonzini | goto fail;
|
170 | 1063b8b1 | Christoph Hellwig | } |
171 | 1063b8b1 | Christoph Hellwig | |
172 | 1063b8b1 | Christoph Hellwig | /*
|
173 | f34e73cd | Paolo Bonzini | * No support for bidirection commands yet.
|
174 | 1063b8b1 | Christoph Hellwig | */
|
175 | f34e73cd | Paolo Bonzini | if (req->elem.out_num > 2 && req->elem.in_num > 3) { |
176 | f34e73cd | Paolo Bonzini | status = VIRTIO_BLK_S_UNSUPP; |
177 | f34e73cd | Paolo Bonzini | goto fail;
|
178 | f34e73cd | Paolo Bonzini | } |
179 | 1063b8b1 | Christoph Hellwig | |
180 | f34e73cd | Paolo Bonzini | #ifdef __linux__
|
181 | f34e73cd | Paolo Bonzini | struct sg_io_hdr hdr;
|
182 | 1063b8b1 | Christoph Hellwig | memset(&hdr, 0, sizeof(struct sg_io_hdr)); |
183 | 1063b8b1 | Christoph Hellwig | hdr.interface_id = 'S';
|
184 | 1063b8b1 | Christoph Hellwig | hdr.cmd_len = req->elem.out_sg[1].iov_len;
|
185 | 1063b8b1 | Christoph Hellwig | hdr.cmdp = req->elem.out_sg[1].iov_base;
|
186 | 1063b8b1 | Christoph Hellwig | hdr.dxfer_len = 0;
|
187 | 1063b8b1 | Christoph Hellwig | |
188 | 1063b8b1 | Christoph Hellwig | if (req->elem.out_num > 2) { |
189 | 1063b8b1 | Christoph Hellwig | /*
|
190 | 1063b8b1 | Christoph Hellwig | * If there are more than the minimally required 2 output segments
|
191 | 1063b8b1 | Christoph Hellwig | * there is write payload starting from the third iovec.
|
192 | 1063b8b1 | Christoph Hellwig | */
|
193 | 1063b8b1 | Christoph Hellwig | hdr.dxfer_direction = SG_DXFER_TO_DEV; |
194 | 1063b8b1 | Christoph Hellwig | hdr.iovec_count = req->elem.out_num - 2;
|
195 | 1063b8b1 | Christoph Hellwig | |
196 | 1063b8b1 | Christoph Hellwig | for (i = 0; i < hdr.iovec_count; i++) |
197 | 1063b8b1 | Christoph Hellwig | hdr.dxfer_len += req->elem.out_sg[i + 2].iov_len;
|
198 | 1063b8b1 | Christoph Hellwig | |
199 | 1063b8b1 | Christoph Hellwig | hdr.dxferp = req->elem.out_sg + 2;
|
200 | 1063b8b1 | Christoph Hellwig | |
201 | 1063b8b1 | Christoph Hellwig | } else if (req->elem.in_num > 3) { |
202 | 1063b8b1 | Christoph Hellwig | /*
|
203 | 1063b8b1 | Christoph Hellwig | * If we have more than 3 input segments the guest wants to actually
|
204 | 1063b8b1 | Christoph Hellwig | * read data.
|
205 | 1063b8b1 | Christoph Hellwig | */
|
206 | 1063b8b1 | Christoph Hellwig | hdr.dxfer_direction = SG_DXFER_FROM_DEV; |
207 | 1063b8b1 | Christoph Hellwig | hdr.iovec_count = req->elem.in_num - 3;
|
208 | 1063b8b1 | Christoph Hellwig | for (i = 0; i < hdr.iovec_count; i++) |
209 | 1063b8b1 | Christoph Hellwig | hdr.dxfer_len += req->elem.in_sg[i].iov_len; |
210 | 1063b8b1 | Christoph Hellwig | |
211 | 1063b8b1 | Christoph Hellwig | hdr.dxferp = req->elem.in_sg; |
212 | 1063b8b1 | Christoph Hellwig | } else {
|
213 | 1063b8b1 | Christoph Hellwig | /*
|
214 | 1063b8b1 | Christoph Hellwig | * Some SCSI commands don't actually transfer any data.
|
215 | 1063b8b1 | Christoph Hellwig | */
|
216 | 1063b8b1 | Christoph Hellwig | hdr.dxfer_direction = SG_DXFER_NONE; |
217 | 1063b8b1 | Christoph Hellwig | } |
218 | 1063b8b1 | Christoph Hellwig | |
219 | 1063b8b1 | Christoph Hellwig | hdr.sbp = req->elem.in_sg[req->elem.in_num - 3].iov_base;
|
220 | 1063b8b1 | Christoph Hellwig | hdr.mx_sb_len = req->elem.in_sg[req->elem.in_num - 3].iov_len;
|
221 | 1063b8b1 | Christoph Hellwig | |
222 | 1063b8b1 | Christoph Hellwig | ret = bdrv_ioctl(req->dev->bs, SG_IO, &hdr); |
223 | 1063b8b1 | Christoph Hellwig | if (ret) {
|
224 | 1063b8b1 | Christoph Hellwig | status = VIRTIO_BLK_S_UNSUPP; |
225 | f34e73cd | Paolo Bonzini | goto fail;
|
226 | 1063b8b1 | Christoph Hellwig | } |
227 | 1063b8b1 | Christoph Hellwig | |
228 | 5bb23927 | Paolo Bonzini | /*
|
229 | 5bb23927 | Paolo Bonzini | * From SCSI-Generic-HOWTO: "Some lower level drivers (e.g. ide-scsi)
|
230 | 5bb23927 | Paolo Bonzini | * clear the masked_status field [hence status gets cleared too, see
|
231 | 5bb23927 | Paolo Bonzini | * block/scsi_ioctl.c] even when a CHECK_CONDITION or COMMAND_TERMINATED
|
232 | 5bb23927 | Paolo Bonzini | * status has occurred. However they do set DRIVER_SENSE in driver_status
|
233 | 5bb23927 | Paolo Bonzini | * field. Also a (sb_len_wr > 0) indicates there is a sense buffer.
|
234 | 5bb23927 | Paolo Bonzini | */
|
235 | 5bb23927 | Paolo Bonzini | if (hdr.status == 0 && hdr.sb_len_wr > 0) { |
236 | 5bb23927 | Paolo Bonzini | hdr.status = CHECK_CONDITION; |
237 | 5bb23927 | Paolo Bonzini | } |
238 | 5bb23927 | Paolo Bonzini | |
239 | 5bb23927 | Paolo Bonzini | stl_p(&req->scsi->errors, |
240 | 5bb23927 | Paolo Bonzini | hdr.status | (hdr.msg_status << 8) |
|
241 | 5bb23927 | Paolo Bonzini | (hdr.host_status << 16) | (hdr.driver_status << 24)); |
242 | 92e3c2a3 | Aurelien Jarno | stl_p(&req->scsi->residual, hdr.resid); |
243 | 92e3c2a3 | Aurelien Jarno | stl_p(&req->scsi->sense_len, hdr.sb_len_wr); |
244 | 92e3c2a3 | Aurelien Jarno | stl_p(&req->scsi->data_len, hdr.dxfer_len); |
245 | 1063b8b1 | Christoph Hellwig | |
246 | 1063b8b1 | Christoph Hellwig | virtio_blk_req_complete(req, status); |
247 | a597e79c | Christoph Hellwig | g_free(req); |
248 | 730a9c53 | Avi Kivity | return;
|
249 | 1063b8b1 | Christoph Hellwig | #else
|
250 | f34e73cd | Paolo Bonzini | abort(); |
251 | f34e73cd | Paolo Bonzini | #endif
|
252 | f34e73cd | Paolo Bonzini | |
253 | f34e73cd | Paolo Bonzini | fail:
|
254 | f34e73cd | Paolo Bonzini | /* Just put anything nonzero so that the ioctl fails in the guest. */
|
255 | f34e73cd | Paolo Bonzini | stl_p(&req->scsi->errors, 255);
|
256 | f34e73cd | Paolo Bonzini | virtio_blk_req_complete(req, status); |
257 | a597e79c | Christoph Hellwig | g_free(req); |
258 | 1063b8b1 | Christoph Hellwig | } |
259 | 1063b8b1 | Christoph Hellwig | |
260 | c20fd872 | Christoph Hellwig | typedef struct MultiReqBuffer { |
261 | c20fd872 | Christoph Hellwig | BlockRequest blkreq[32];
|
262 | c20fd872 | Christoph Hellwig | unsigned int num_writes; |
263 | c20fd872 | Christoph Hellwig | } MultiReqBuffer; |
264 | c20fd872 | Christoph Hellwig | |
265 | c20fd872 | Christoph Hellwig | static void virtio_submit_multiwrite(BlockDriverState *bs, MultiReqBuffer *mrb) |
266 | 869a5c6d | aliguori | { |
267 | 91553dcc | Kevin Wolf | int i, ret;
|
268 | 91553dcc | Kevin Wolf | |
269 | c20fd872 | Christoph Hellwig | if (!mrb->num_writes) {
|
270 | c20fd872 | Christoph Hellwig | return;
|
271 | c20fd872 | Christoph Hellwig | } |
272 | c20fd872 | Christoph Hellwig | |
273 | c20fd872 | Christoph Hellwig | ret = bdrv_aio_multiwrite(bs, mrb->blkreq, mrb->num_writes); |
274 | 91553dcc | Kevin Wolf | if (ret != 0) { |
275 | c20fd872 | Christoph Hellwig | for (i = 0; i < mrb->num_writes; i++) { |
276 | c20fd872 | Christoph Hellwig | if (mrb->blkreq[i].error) {
|
277 | c20fd872 | Christoph Hellwig | virtio_blk_rw_complete(mrb->blkreq[i].opaque, -EIO); |
278 | 91553dcc | Kevin Wolf | } |
279 | 91553dcc | Kevin Wolf | } |
280 | 91553dcc | Kevin Wolf | } |
281 | c20fd872 | Christoph Hellwig | |
282 | c20fd872 | Christoph Hellwig | mrb->num_writes = 0;
|
283 | 91553dcc | Kevin Wolf | } |
284 | 87b245db | Christoph Hellwig | |
285 | c20fd872 | Christoph Hellwig | static void virtio_blk_handle_flush(VirtIOBlockReq *req, MultiReqBuffer *mrb) |
286 | aa659be3 | Christoph Hellwig | { |
287 | a597e79c | Christoph Hellwig | bdrv_acct_start(req->dev->bs, &req->acct, 0, BDRV_ACCT_FLUSH);
|
288 | a597e79c | Christoph Hellwig | |
289 | 618fbb84 | Christoph Hellwig | /*
|
290 | 618fbb84 | Christoph Hellwig | * Make sure all outstanding writes are posted to the backing device.
|
291 | 618fbb84 | Christoph Hellwig | */
|
292 | c20fd872 | Christoph Hellwig | virtio_submit_multiwrite(req->dev->bs, mrb); |
293 | ad54ae80 | Paolo Bonzini | bdrv_aio_flush(req->dev->bs, virtio_blk_flush_complete, req); |
294 | aa659be3 | Christoph Hellwig | } |
295 | aa659be3 | Christoph Hellwig | |
296 | c20fd872 | Christoph Hellwig | static void virtio_blk_handle_write(VirtIOBlockReq *req, MultiReqBuffer *mrb) |
297 | 91553dcc | Kevin Wolf | { |
298 | c20fd872 | Christoph Hellwig | BlockRequest *blkreq; |
299 | 92e3c2a3 | Aurelien Jarno | uint64_t sector; |
300 | c20fd872 | Christoph Hellwig | |
301 | 92e3c2a3 | Aurelien Jarno | sector = ldq_p(&req->out->sector); |
302 | 6d519a5f | Stefan Hajnoczi | |
303 | a597e79c | Christoph Hellwig | bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_WRITE); |
304 | a597e79c | Christoph Hellwig | |
305 | 92e3c2a3 | Aurelien Jarno | trace_virtio_blk_handle_write(req, sector, req->qiov.size / 512);
|
306 | 92e3c2a3 | Aurelien Jarno | |
307 | 92e3c2a3 | Aurelien Jarno | if (sector & req->dev->sector_mask) {
|
308 | 8cfacf07 | Christoph Hellwig | virtio_blk_rw_complete(req, -EIO); |
309 | 8cfacf07 | Christoph Hellwig | return;
|
310 | 8cfacf07 | Christoph Hellwig | } |
311 | 52c05023 | Christoph Hellwig | if (req->qiov.size % req->dev->conf->logical_block_size) {
|
312 | 52c05023 | Christoph Hellwig | virtio_blk_rw_complete(req, -EIO); |
313 | 52c05023 | Christoph Hellwig | return;
|
314 | 52c05023 | Christoph Hellwig | } |
315 | 8cfacf07 | Christoph Hellwig | |
316 | c20fd872 | Christoph Hellwig | if (mrb->num_writes == 32) { |
317 | c20fd872 | Christoph Hellwig | virtio_submit_multiwrite(req->dev->bs, mrb); |
318 | 87b245db | Christoph Hellwig | } |
319 | 91553dcc | Kevin Wolf | |
320 | c20fd872 | Christoph Hellwig | blkreq = &mrb->blkreq[mrb->num_writes]; |
321 | 92e3c2a3 | Aurelien Jarno | blkreq->sector = sector; |
322 | c20fd872 | Christoph Hellwig | blkreq->nb_sectors = req->qiov.size / BDRV_SECTOR_SIZE; |
323 | c20fd872 | Christoph Hellwig | blkreq->qiov = &req->qiov; |
324 | c20fd872 | Christoph Hellwig | blkreq->cb = virtio_blk_rw_complete; |
325 | c20fd872 | Christoph Hellwig | blkreq->opaque = req; |
326 | c20fd872 | Christoph Hellwig | blkreq->error = 0;
|
327 | 91553dcc | Kevin Wolf | |
328 | c20fd872 | Christoph Hellwig | mrb->num_writes++; |
329 | d28a1b6e | aliguori | } |
330 | 869a5c6d | aliguori | |
331 | d28a1b6e | aliguori | static void virtio_blk_handle_read(VirtIOBlockReq *req) |
332 | d28a1b6e | aliguori | { |
333 | 92e3c2a3 | Aurelien Jarno | uint64_t sector; |
334 | 92e3c2a3 | Aurelien Jarno | |
335 | 92e3c2a3 | Aurelien Jarno | sector = ldq_p(&req->out->sector); |
336 | 87b245db | Christoph Hellwig | |
337 | a597e79c | Christoph Hellwig | bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_READ); |
338 | a597e79c | Christoph Hellwig | |
339 | 81b6b9fa | Stefan Hajnoczi | trace_virtio_blk_handle_read(req, sector, req->qiov.size / 512);
|
340 | 81b6b9fa | Stefan Hajnoczi | |
341 | 92e3c2a3 | Aurelien Jarno | if (sector & req->dev->sector_mask) {
|
342 | 8cfacf07 | Christoph Hellwig | virtio_blk_rw_complete(req, -EIO); |
343 | 8cfacf07 | Christoph Hellwig | return;
|
344 | 8cfacf07 | Christoph Hellwig | } |
345 | 52c05023 | Christoph Hellwig | if (req->qiov.size % req->dev->conf->logical_block_size) {
|
346 | 52c05023 | Christoph Hellwig | virtio_blk_rw_complete(req, -EIO); |
347 | 52c05023 | Christoph Hellwig | return;
|
348 | 52c05023 | Christoph Hellwig | } |
349 | ad54ae80 | Paolo Bonzini | bdrv_aio_readv(req->dev->bs, sector, &req->qiov, |
350 | ad54ae80 | Paolo Bonzini | req->qiov.size / BDRV_SECTOR_SIZE, |
351 | ad54ae80 | Paolo Bonzini | virtio_blk_rw_complete, req); |
352 | 869a5c6d | aliguori | } |
353 | 869a5c6d | aliguori | |
354 | bc6694d4 | Kevin Wolf | static void virtio_blk_handle_request(VirtIOBlockReq *req, |
355 | bc6694d4 | Kevin Wolf | MultiReqBuffer *mrb) |
356 | bc6694d4 | Kevin Wolf | { |
357 | 92e3c2a3 | Aurelien Jarno | uint32_t type; |
358 | 92e3c2a3 | Aurelien Jarno | |
359 | bc6694d4 | Kevin Wolf | if (req->elem.out_num < 1 || req->elem.in_num < 1) { |
360 | 870cef1d | Stefan Hajnoczi | error_report("virtio-blk missing headers");
|
361 | bc6694d4 | Kevin Wolf | exit(1);
|
362 | bc6694d4 | Kevin Wolf | } |
363 | bc6694d4 | Kevin Wolf | |
364 | bc6694d4 | Kevin Wolf | if (req->elem.out_sg[0].iov_len < sizeof(*req->out) || |
365 | bc6694d4 | Kevin Wolf | req->elem.in_sg[req->elem.in_num - 1].iov_len < sizeof(*req->in)) { |
366 | 870cef1d | Stefan Hajnoczi | error_report("virtio-blk header not in correct element");
|
367 | bc6694d4 | Kevin Wolf | exit(1);
|
368 | bc6694d4 | Kevin Wolf | } |
369 | bc6694d4 | Kevin Wolf | |
370 | bc6694d4 | Kevin Wolf | req->out = (void *)req->elem.out_sg[0].iov_base; |
371 | bc6694d4 | Kevin Wolf | req->in = (void *)req->elem.in_sg[req->elem.in_num - 1].iov_base; |
372 | bc6694d4 | Kevin Wolf | |
373 | 92e3c2a3 | Aurelien Jarno | type = ldl_p(&req->out->type); |
374 | 92e3c2a3 | Aurelien Jarno | |
375 | 92e3c2a3 | Aurelien Jarno | if (type & VIRTIO_BLK_T_FLUSH) {
|
376 | c20fd872 | Christoph Hellwig | virtio_blk_handle_flush(req, mrb); |
377 | 92e3c2a3 | Aurelien Jarno | } else if (type & VIRTIO_BLK_T_SCSI_CMD) { |
378 | bc6694d4 | Kevin Wolf | virtio_blk_handle_scsi(req); |
379 | 92e3c2a3 | Aurelien Jarno | } else if (type & VIRTIO_BLK_T_GET_ID) { |
380 | 2930b313 | john cooper | VirtIOBlock *s = req->dev; |
381 | 2930b313 | john cooper | |
382 | a8686a9b | Markus Armbruster | /*
|
383 | a8686a9b | Markus Armbruster | * NB: per existing s/n string convention the string is
|
384 | a8686a9b | Markus Armbruster | * terminated by '\0' only when shorter than buffer.
|
385 | a8686a9b | Markus Armbruster | */
|
386 | a8686a9b | Markus Armbruster | strncpy(req->elem.in_sg[0].iov_base,
|
387 | 12c5674b | Paolo Bonzini | s->blk->serial ? s->blk->serial : "",
|
388 | a8686a9b | Markus Armbruster | MIN(req->elem.in_sg[0].iov_len, VIRTIO_BLK_ID_BYTES));
|
389 | 2930b313 | john cooper | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); |
390 | a597e79c | Christoph Hellwig | g_free(req); |
391 | 92e3c2a3 | Aurelien Jarno | } else if (type & VIRTIO_BLK_T_OUT) { |
392 | bc6694d4 | Kevin Wolf | qemu_iovec_init_external(&req->qiov, &req->elem.out_sg[1],
|
393 | bc6694d4 | Kevin Wolf | req->elem.out_num - 1);
|
394 | c20fd872 | Christoph Hellwig | virtio_blk_handle_write(req, mrb); |
395 | bc6694d4 | Kevin Wolf | } else {
|
396 | bc6694d4 | Kevin Wolf | qemu_iovec_init_external(&req->qiov, &req->elem.in_sg[0],
|
397 | bc6694d4 | Kevin Wolf | req->elem.in_num - 1);
|
398 | bc6694d4 | Kevin Wolf | virtio_blk_handle_read(req); |
399 | bc6694d4 | Kevin Wolf | } |
400 | bc6694d4 | Kevin Wolf | } |
401 | bc6694d4 | Kevin Wolf | |
402 | 6e02c38d | aliguori | static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq) |
403 | 6e02c38d | aliguori | { |
404 | 6e02c38d | aliguori | VirtIOBlock *s = to_virtio_blk(vdev); |
405 | 6e02c38d | aliguori | VirtIOBlockReq *req; |
406 | bc6694d4 | Kevin Wolf | MultiReqBuffer mrb = { |
407 | bc6694d4 | Kevin Wolf | .num_writes = 0,
|
408 | bc6694d4 | Kevin Wolf | }; |
409 | 6e02c38d | aliguori | |
410 | 6e02c38d | aliguori | while ((req = virtio_blk_get_request(s))) {
|
411 | bc6694d4 | Kevin Wolf | virtio_blk_handle_request(req, &mrb); |
412 | 6e02c38d | aliguori | } |
413 | 91553dcc | Kevin Wolf | |
414 | c20fd872 | Christoph Hellwig | virtio_submit_multiwrite(s->bs, &mrb); |
415 | 91553dcc | Kevin Wolf | |
416 | 6e02c38d | aliguori | /*
|
417 | 6e02c38d | aliguori | * FIXME: Want to check for completions before returning to guest mode,
|
418 | 6e02c38d | aliguori | * so cached reads and writes are reported as quickly as possible. But
|
419 | 6e02c38d | aliguori | * that should be done in the generic block layer.
|
420 | 6e02c38d | aliguori | */
|
421 | 6e02c38d | aliguori | } |
422 | 6e02c38d | aliguori | |
423 | 213189ab | Markus Armbruster | static void virtio_blk_dma_restart_bh(void *opaque) |
424 | 869a5c6d | aliguori | { |
425 | 869a5c6d | aliguori | VirtIOBlock *s = opaque; |
426 | 869a5c6d | aliguori | VirtIOBlockReq *req = s->rq; |
427 | f1b52868 | Kevin Wolf | MultiReqBuffer mrb = { |
428 | f1b52868 | Kevin Wolf | .num_writes = 0,
|
429 | f1b52868 | Kevin Wolf | }; |
430 | 869a5c6d | aliguori | |
431 | 213189ab | Markus Armbruster | qemu_bh_delete(s->bh); |
432 | 213189ab | Markus Armbruster | s->bh = NULL;
|
433 | 869a5c6d | aliguori | |
434 | 869a5c6d | aliguori | s->rq = NULL;
|
435 | 869a5c6d | aliguori | |
436 | 869a5c6d | aliguori | while (req) {
|
437 | f1b52868 | Kevin Wolf | virtio_blk_handle_request(req, &mrb); |
438 | 869a5c6d | aliguori | req = req->next; |
439 | 869a5c6d | aliguori | } |
440 | f1b52868 | Kevin Wolf | |
441 | c20fd872 | Christoph Hellwig | virtio_submit_multiwrite(s->bs, &mrb); |
442 | 869a5c6d | aliguori | } |
443 | 869a5c6d | aliguori | |
444 | 1dfb4dd9 | Luiz Capitulino | static void virtio_blk_dma_restart_cb(void *opaque, int running, |
445 | 1dfb4dd9 | Luiz Capitulino | RunState state) |
446 | 213189ab | Markus Armbruster | { |
447 | 213189ab | Markus Armbruster | VirtIOBlock *s = opaque; |
448 | 213189ab | Markus Armbruster | |
449 | 213189ab | Markus Armbruster | if (!running)
|
450 | 213189ab | Markus Armbruster | return;
|
451 | 213189ab | Markus Armbruster | |
452 | 213189ab | Markus Armbruster | if (!s->bh) {
|
453 | 213189ab | Markus Armbruster | s->bh = qemu_bh_new(virtio_blk_dma_restart_bh, s); |
454 | 213189ab | Markus Armbruster | qemu_bh_schedule(s->bh); |
455 | 213189ab | Markus Armbruster | } |
456 | 213189ab | Markus Armbruster | } |
457 | 213189ab | Markus Armbruster | |
458 | 6e02c38d | aliguori | static void virtio_blk_reset(VirtIODevice *vdev) |
459 | 6e02c38d | aliguori | { |
460 | 6e02c38d | aliguori | /*
|
461 | 6e02c38d | aliguori | * This should cancel pending requests, but can't do nicely until there
|
462 | 6e02c38d | aliguori | * are per-device request lists.
|
463 | 6e02c38d | aliguori | */
|
464 | 922453bc | Stefan Hajnoczi | bdrv_drain_all(); |
465 | 6e02c38d | aliguori | } |
466 | 6e02c38d | aliguori | |
467 | bf011293 | john cooper | /* coalesce internal state, copy to pci i/o region 0
|
468 | bf011293 | john cooper | */
|
469 | 6e02c38d | aliguori | static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config) |
470 | 6e02c38d | aliguori | { |
471 | 6e02c38d | aliguori | VirtIOBlock *s = to_virtio_blk(vdev); |
472 | 6e02c38d | aliguori | struct virtio_blk_config blkcfg;
|
473 | 6e02c38d | aliguori | uint64_t capacity; |
474 | 3a395142 | Paolo Bonzini | int blk_size = s->conf->logical_block_size;
|
475 | 6e02c38d | aliguori | |
476 | 6e02c38d | aliguori | bdrv_get_geometry(s->bs, &capacity); |
477 | 5c5dafdc | Gerd Hoffmann | memset(&blkcfg, 0, sizeof(blkcfg)); |
478 | 6e02c38d | aliguori | stq_raw(&blkcfg.capacity, capacity); |
479 | 6e02c38d | aliguori | stl_raw(&blkcfg.seg_max, 128 - 2); |
480 | e63e7fde | Markus Armbruster | stw_raw(&blkcfg.cylinders, s->conf->cyls); |
481 | 3a395142 | Paolo Bonzini | stl_raw(&blkcfg.blk_size, blk_size); |
482 | 3a395142 | Paolo Bonzini | stw_raw(&blkcfg.min_io_size, s->conf->min_io_size / blk_size); |
483 | 3a395142 | Paolo Bonzini | stw_raw(&blkcfg.opt_io_size, s->conf->opt_io_size / blk_size); |
484 | e63e7fde | Markus Armbruster | blkcfg.heads = s->conf->heads; |
485 | 136be99e | Christian Borntraeger | /*
|
486 | 136be99e | Christian Borntraeger | * We must ensure that the block device capacity is a multiple of
|
487 | 136be99e | Christian Borntraeger | * the logical block size. If that is not the case, lets use
|
488 | 136be99e | Christian Borntraeger | * sector_mask to adopt the geometry to have a correct picture.
|
489 | 136be99e | Christian Borntraeger | * For those devices where the capacity is ok for the given geometry
|
490 | 136be99e | Christian Borntraeger | * we dont touch the sector value of the geometry, since some devices
|
491 | 136be99e | Christian Borntraeger | * (like s390 dasd) need a specific value. Here the capacity is already
|
492 | 136be99e | Christian Borntraeger | * cyls*heads*secs*blk_size and the sector value is not block size
|
493 | 136be99e | Christian Borntraeger | * divided by 512 - instead it is the amount of blk_size blocks
|
494 | 136be99e | Christian Borntraeger | * per track (cylinder).
|
495 | 136be99e | Christian Borntraeger | */
|
496 | e63e7fde | Markus Armbruster | if (bdrv_getlength(s->bs) / s->conf->heads / s->conf->secs % blk_size) {
|
497 | e63e7fde | Markus Armbruster | blkcfg.sectors = s->conf->secs & ~s->sector_mask; |
498 | 136be99e | Christian Borntraeger | } else {
|
499 | e63e7fde | Markus Armbruster | blkcfg.sectors = s->conf->secs; |
500 | 136be99e | Christian Borntraeger | } |
501 | c7085da7 | Blue Swirl | blkcfg.size_max = 0;
|
502 | 9752c371 | Christoph Hellwig | blkcfg.physical_block_exp = get_physical_block_exp(s->conf); |
503 | 9752c371 | Christoph Hellwig | blkcfg.alignment_offset = 0;
|
504 | 13e3dce0 | Paolo Bonzini | blkcfg.wce = bdrv_enable_write_cache(s->bs); |
505 | 37d5ddd6 | hch@lst.de | memcpy(config, &blkcfg, sizeof(struct virtio_blk_config)); |
506 | 6e02c38d | aliguori | } |
507 | 6e02c38d | aliguori | |
508 | 13e3dce0 | Paolo Bonzini | static void virtio_blk_set_config(VirtIODevice *vdev, const uint8_t *config) |
509 | 13e3dce0 | Paolo Bonzini | { |
510 | 13e3dce0 | Paolo Bonzini | VirtIOBlock *s = to_virtio_blk(vdev); |
511 | 13e3dce0 | Paolo Bonzini | struct virtio_blk_config blkcfg;
|
512 | 13e3dce0 | Paolo Bonzini | |
513 | 13e3dce0 | Paolo Bonzini | memcpy(&blkcfg, config, sizeof(blkcfg));
|
514 | 13e3dce0 | Paolo Bonzini | bdrv_set_enable_write_cache(s->bs, blkcfg.wce != 0);
|
515 | 13e3dce0 | Paolo Bonzini | } |
516 | 13e3dce0 | Paolo Bonzini | |
517 | 8172539d | Michael S. Tsirkin | static uint32_t virtio_blk_get_features(VirtIODevice *vdev, uint32_t features)
|
518 | 6e02c38d | aliguori | { |
519 | bf011293 | john cooper | VirtIOBlock *s = to_virtio_blk(vdev); |
520 | 1063b8b1 | Christoph Hellwig | |
521 | 1063b8b1 | Christoph Hellwig | features |= (1 << VIRTIO_BLK_F_SEG_MAX);
|
522 | 1063b8b1 | Christoph Hellwig | features |= (1 << VIRTIO_BLK_F_GEOMETRY);
|
523 | 9752c371 | Christoph Hellwig | features |= (1 << VIRTIO_BLK_F_TOPOLOGY);
|
524 | 8cfacf07 | Christoph Hellwig | features |= (1 << VIRTIO_BLK_F_BLK_SIZE);
|
525 | a6c5c84a | Paolo Bonzini | features |= (1 << VIRTIO_BLK_F_SCSI);
|
526 | aa659be3 | Christoph Hellwig | |
527 | aa659be3 | Christoph Hellwig | if (bdrv_enable_write_cache(s->bs))
|
528 | 13e3dce0 | Paolo Bonzini | features |= (1 << VIRTIO_BLK_F_WCE);
|
529 | 13e3dce0 | Paolo Bonzini | |
530 | c79662f7 | Naphtali Sprei | if (bdrv_is_read_only(s->bs))
|
531 | c79662f7 | Naphtali Sprei | features |= 1 << VIRTIO_BLK_F_RO;
|
532 | 1063b8b1 | Christoph Hellwig | |
533 | 1063b8b1 | Christoph Hellwig | return features;
|
534 | 6e02c38d | aliguori | } |
535 | 6e02c38d | aliguori | |
536 | 9315cbfd | Paolo Bonzini | static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status) |
537 | 9315cbfd | Paolo Bonzini | { |
538 | 9315cbfd | Paolo Bonzini | VirtIOBlock *s = to_virtio_blk(vdev); |
539 | 9315cbfd | Paolo Bonzini | uint32_t features; |
540 | 9315cbfd | Paolo Bonzini | |
541 | 9315cbfd | Paolo Bonzini | if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
542 | 9315cbfd | Paolo Bonzini | return;
|
543 | 9315cbfd | Paolo Bonzini | } |
544 | 9315cbfd | Paolo Bonzini | |
545 | 9315cbfd | Paolo Bonzini | features = vdev->guest_features; |
546 | 9315cbfd | Paolo Bonzini | bdrv_set_enable_write_cache(s->bs, !!(features & (1 << VIRTIO_BLK_F_WCE)));
|
547 | 9315cbfd | Paolo Bonzini | } |
548 | 9315cbfd | Paolo Bonzini | |
549 | 6e02c38d | aliguori | static void virtio_blk_save(QEMUFile *f, void *opaque) |
550 | 6e02c38d | aliguori | { |
551 | 6e02c38d | aliguori | VirtIOBlock *s = opaque; |
552 | 869a5c6d | aliguori | VirtIOBlockReq *req = s->rq; |
553 | 869a5c6d | aliguori | |
554 | 6e02c38d | aliguori | virtio_save(&s->vdev, f); |
555 | 869a5c6d | aliguori | |
556 | 869a5c6d | aliguori | while (req) {
|
557 | 869a5c6d | aliguori | qemu_put_sbyte(f, 1);
|
558 | 869a5c6d | aliguori | qemu_put_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem)); |
559 | 869a5c6d | aliguori | req = req->next; |
560 | 869a5c6d | aliguori | } |
561 | 869a5c6d | aliguori | qemu_put_sbyte(f, 0);
|
562 | 6e02c38d | aliguori | } |
563 | 6e02c38d | aliguori | |
564 | 6e02c38d | aliguori | static int virtio_blk_load(QEMUFile *f, void *opaque, int version_id) |
565 | 6e02c38d | aliguori | { |
566 | 6e02c38d | aliguori | VirtIOBlock *s = opaque; |
567 | 2a633c46 | Orit Wassermann | int ret;
|
568 | 6e02c38d | aliguori | |
569 | 869a5c6d | aliguori | if (version_id != 2) |
570 | 6e02c38d | aliguori | return -EINVAL;
|
571 | 6e02c38d | aliguori | |
572 | 2a633c46 | Orit Wassermann | ret = virtio_load(&s->vdev, f); |
573 | 2a633c46 | Orit Wassermann | if (ret) {
|
574 | 2a633c46 | Orit Wassermann | return ret;
|
575 | 2a633c46 | Orit Wassermann | } |
576 | 2a633c46 | Orit Wassermann | |
577 | 869a5c6d | aliguori | while (qemu_get_sbyte(f)) {
|
578 | 869a5c6d | aliguori | VirtIOBlockReq *req = virtio_blk_alloc_request(s); |
579 | 869a5c6d | aliguori | qemu_get_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem)); |
580 | 869a5c6d | aliguori | req->next = s->rq; |
581 | 20a81e4d | Yoshiaki Tamura | s->rq = req; |
582 | b6a4805b | Kevin Wolf | |
583 | b6a4805b | Kevin Wolf | virtqueue_map_sg(req->elem.in_sg, req->elem.in_addr, |
584 | b6a4805b | Kevin Wolf | req->elem.in_num, 1);
|
585 | b6a4805b | Kevin Wolf | virtqueue_map_sg(req->elem.out_sg, req->elem.out_addr, |
586 | b6a4805b | Kevin Wolf | req->elem.out_num, 0);
|
587 | 869a5c6d | aliguori | } |
588 | 6e02c38d | aliguori | |
589 | 6e02c38d | aliguori | return 0; |
590 | 6e02c38d | aliguori | } |
591 | 6e02c38d | aliguori | |
592 | 145feb17 | Markus Armbruster | static void virtio_blk_resize(void *opaque) |
593 | e5051fc7 | Christoph Hellwig | { |
594 | e5051fc7 | Christoph Hellwig | VirtIOBlock *s = opaque; |
595 | e5051fc7 | Christoph Hellwig | |
596 | 145feb17 | Markus Armbruster | virtio_notify_config(&s->vdev); |
597 | e5051fc7 | Christoph Hellwig | } |
598 | e5051fc7 | Christoph Hellwig | |
599 | 0e49de52 | Markus Armbruster | static const BlockDevOps virtio_block_ops = { |
600 | 145feb17 | Markus Armbruster | .resize_cb = virtio_blk_resize, |
601 | 0e49de52 | Markus Armbruster | }; |
602 | 0e49de52 | Markus Armbruster | |
603 | 12c5674b | Paolo Bonzini | VirtIODevice *virtio_blk_init(DeviceState *dev, VirtIOBlkConf *blk) |
604 | 6e02c38d | aliguori | { |
605 | 6e02c38d | aliguori | VirtIOBlock *s; |
606 | 6e02c38d | aliguori | static int virtio_blk_id; |
607 | cf21e106 | Paul Brook | |
608 | 12c5674b | Paolo Bonzini | if (!blk->conf.bs) {
|
609 | 6a84cb1f | Markus Armbruster | error_report("drive property not set");
|
610 | d75d25e3 | Markus Armbruster | return NULL; |
611 | d75d25e3 | Markus Armbruster | } |
612 | 12c5674b | Paolo Bonzini | if (!bdrv_is_inserted(blk->conf.bs)) {
|
613 | 98f28ad7 | Markus Armbruster | error_report("Device needs media, but drive is empty");
|
614 | 98f28ad7 | Markus Armbruster | return NULL; |
615 | 98f28ad7 | Markus Armbruster | } |
616 | d75d25e3 | Markus Armbruster | |
617 | 911525db | Markus Armbruster | blkconf_serial(&blk->conf, &blk->serial); |
618 | b7eb0c9f | Markus Armbruster | if (blkconf_geometry(&blk->conf, NULL, 65535, 255, 255) < 0) { |
619 | b7eb0c9f | Markus Armbruster | return NULL; |
620 | b7eb0c9f | Markus Armbruster | } |
621 | a8686a9b | Markus Armbruster | |
622 | 53c25cea | Paul Brook | s = (VirtIOBlock *)virtio_common_init("virtio-blk", VIRTIO_ID_BLOCK,
|
623 | 37d5ddd6 | hch@lst.de | sizeof(struct virtio_blk_config), |
624 | 53c25cea | Paul Brook | sizeof(VirtIOBlock));
|
625 | 6e02c38d | aliguori | |
626 | 6e02c38d | aliguori | s->vdev.get_config = virtio_blk_update_config; |
627 | 13e3dce0 | Paolo Bonzini | s->vdev.set_config = virtio_blk_set_config; |
628 | 6e02c38d | aliguori | s->vdev.get_features = virtio_blk_get_features; |
629 | 9315cbfd | Paolo Bonzini | s->vdev.set_status = virtio_blk_set_status; |
630 | 6e02c38d | aliguori | s->vdev.reset = virtio_blk_reset; |
631 | 12c5674b | Paolo Bonzini | s->bs = blk->conf.bs; |
632 | 12c5674b | Paolo Bonzini | s->conf = &blk->conf; |
633 | 12c5674b | Paolo Bonzini | s->blk = blk; |
634 | 869a5c6d | aliguori | s->rq = NULL;
|
635 | 1573a35d | Jes Sorensen | s->sector_mask = (s->conf->logical_block_size / BDRV_SECTOR_SIZE) - 1;
|
636 | e63e7fde | Markus Armbruster | |
637 | 6e02c38d | aliguori | s->vq = virtio_add_queue(&s->vdev, 128, virtio_blk_handle_output);
|
638 | 6e02c38d | aliguori | |
639 | 869a5c6d | aliguori | qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s); |
640 | 9d0d3138 | Alex Williamson | s->qdev = dev; |
641 | 0be71e32 | Alex Williamson | register_savevm(dev, "virtio-blk", virtio_blk_id++, 2, |
642 | 6e02c38d | aliguori | virtio_blk_save, virtio_blk_load, s); |
643 | 0e49de52 | Markus Armbruster | bdrv_set_dev_ops(s->bs, &virtio_block_ops, s); |
644 | 12c5674b | Paolo Bonzini | bdrv_set_buffer_alignment(s->bs, s->conf->logical_block_size); |
645 | 6e02c38d | aliguori | |
646 | af239a62 | Luiz Capitulino | bdrv_iostatus_enable(s->bs); |
647 | 12c5674b | Paolo Bonzini | add_boot_device_path(s->conf->bootindex, dev, "/disk@0,0");
|
648 | 1ca4d09a | Gleb Natapov | |
649 | 53c25cea | Paul Brook | return &s->vdev;
|
650 | 6e02c38d | aliguori | } |
651 | 9d0d3138 | Alex Williamson | |
652 | 9d0d3138 | Alex Williamson | void virtio_blk_exit(VirtIODevice *vdev)
|
653 | 9d0d3138 | Alex Williamson | { |
654 | 9d0d3138 | Alex Williamson | VirtIOBlock *s = to_virtio_blk(vdev); |
655 | 9d0d3138 | Alex Williamson | unregister_savevm(s->qdev, "virtio-blk", s);
|
656 | 0e47931b | Paolo Bonzini | blockdev_mark_auto_del(s->bs); |
657 | d92551f2 | Amit Shah | virtio_cleanup(vdev); |
658 | 9d0d3138 | Alex Williamson | } |