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1 | 6e02c38d | aliguori | /*
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2 | 6e02c38d | aliguori | * Virtio Block Device
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3 | 6e02c38d | aliguori | *
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4 | 6e02c38d | aliguori | * Copyright IBM, Corp. 2007
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5 | 6e02c38d | aliguori | *
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6 | 6e02c38d | aliguori | * Authors:
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7 | 6e02c38d | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
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8 | 6e02c38d | aliguori | *
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9 | 6e02c38d | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | 6e02c38d | aliguori | * the COPYING file in the top-level directory.
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11 | 6e02c38d | aliguori | *
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12 | 6e02c38d | aliguori | */
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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 | 2446333c | Blue Swirl | #include "blockdev.h" |
18 | 6e02c38d | aliguori | #include "virtio-blk.h" |
19 | 5bb23927 | Paolo Bonzini | #include "scsi-defs.h" |
20 | 1063b8b1 | Christoph Hellwig | #ifdef __linux__
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21 | 1063b8b1 | Christoph Hellwig | # include <scsi/sg.h> |
22 | 1063b8b1 | Christoph Hellwig | #endif
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23 | 6e02c38d | aliguori | |
24 | 6e02c38d | aliguori | typedef struct VirtIOBlock |
25 | 6e02c38d | aliguori | { |
26 | 6e02c38d | aliguori | VirtIODevice vdev; |
27 | 6e02c38d | aliguori | BlockDriverState *bs; |
28 | 6e02c38d | aliguori | VirtQueue *vq; |
29 | 869a5c6d | aliguori | void *rq;
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30 | 213189ab | Markus Armbruster | QEMUBH *bh; |
31 | 9752c371 | Christoph Hellwig | BlockConf *conf; |
32 | a8686a9b | Markus Armbruster | char *serial;
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33 | 8cfacf07 | Christoph Hellwig | unsigned short sector_mask; |
34 | 9d0d3138 | Alex Williamson | DeviceState *qdev; |
35 | 6e02c38d | aliguori | } VirtIOBlock; |
36 | 6e02c38d | aliguori | |
37 | 6e02c38d | aliguori | static VirtIOBlock *to_virtio_blk(VirtIODevice *vdev)
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38 | 6e02c38d | aliguori | { |
39 | 6e02c38d | aliguori | return (VirtIOBlock *)vdev;
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40 | 6e02c38d | aliguori | } |
41 | 6e02c38d | aliguori | |
42 | 6e02c38d | aliguori | typedef struct VirtIOBlockReq |
43 | 6e02c38d | aliguori | { |
44 | 6e02c38d | aliguori | VirtIOBlock *dev; |
45 | 6e02c38d | aliguori | VirtQueueElement elem; |
46 | 6e02c38d | aliguori | struct virtio_blk_inhdr *in;
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47 | 6e02c38d | aliguori | struct virtio_blk_outhdr *out;
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48 | 1063b8b1 | Christoph Hellwig | struct virtio_scsi_inhdr *scsi;
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49 | d28a1b6e | aliguori | QEMUIOVector qiov; |
50 | 869a5c6d | aliguori | struct VirtIOBlockReq *next;
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51 | a597e79c | Christoph Hellwig | BlockAcctCookie acct; |
52 | 6e02c38d | aliguori | } VirtIOBlockReq; |
53 | 6e02c38d | aliguori | |
54 | 869a5c6d | aliguori | static void virtio_blk_req_complete(VirtIOBlockReq *req, int status) |
55 | 869a5c6d | aliguori | { |
56 | 869a5c6d | aliguori | VirtIOBlock *s = req->dev; |
57 | 869a5c6d | aliguori | |
58 | 6d519a5f | Stefan Hajnoczi | trace_virtio_blk_req_complete(req, status); |
59 | 6d519a5f | Stefan Hajnoczi | |
60 | 92e3c2a3 | Aurelien Jarno | stb_p(&req->in->status, status); |
61 | d28a1b6e | aliguori | virtqueue_push(s->vq, &req->elem, req->qiov.size + sizeof(*req->in));
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62 | 869a5c6d | aliguori | virtio_notify(&s->vdev, s->vq); |
63 | 869a5c6d | aliguori | } |
64 | 869a5c6d | aliguori | |
65 | f35d68f0 | Kevin Wolf | static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error, |
66 | f35d68f0 | Kevin Wolf | int is_read)
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67 | 869a5c6d | aliguori | { |
68 | abd7f68d | Markus Armbruster | BlockErrorAction action = bdrv_get_on_error(req->dev->bs, is_read); |
69 | 869a5c6d | aliguori | VirtIOBlock *s = req->dev; |
70 | 869a5c6d | aliguori | |
71 | eaa6c85f | Luiz Capitulino | if (action == BLOCK_ERR_IGNORE) {
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72 | 908bb949 | Kevin Wolf | bdrv_mon_event(s->bs, BDRV_ACTION_IGNORE, is_read); |
73 | 869a5c6d | aliguori | return 0; |
74 | eaa6c85f | Luiz Capitulino | } |
75 | 869a5c6d | aliguori | |
76 | 869a5c6d | aliguori | if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC)
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77 | 869a5c6d | aliguori | || action == BLOCK_ERR_STOP_ANY) { |
78 | 869a5c6d | aliguori | req->next = s->rq; |
79 | 869a5c6d | aliguori | s->rq = req; |
80 | 908bb949 | Kevin Wolf | bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read); |
81 | 0461d5a6 | Luiz Capitulino | vm_stop(RUN_STATE_IO_ERROR); |
82 | af239a62 | Luiz Capitulino | bdrv_iostatus_set_err(s->bs, error); |
83 | 869a5c6d | aliguori | } else {
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84 | 869a5c6d | aliguori | virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); |
85 | a597e79c | Christoph Hellwig | bdrv_acct_done(s->bs, &req->acct); |
86 | a597e79c | Christoph Hellwig | g_free(req); |
87 | 908bb949 | Kevin Wolf | bdrv_mon_event(s->bs, BDRV_ACTION_REPORT, is_read); |
88 | 869a5c6d | aliguori | } |
89 | 869a5c6d | aliguori | |
90 | 869a5c6d | aliguori | return 1; |
91 | 869a5c6d | aliguori | } |
92 | 869a5c6d | aliguori | |
93 | 6e02c38d | aliguori | static void virtio_blk_rw_complete(void *opaque, int ret) |
94 | 6e02c38d | aliguori | { |
95 | 6e02c38d | aliguori | VirtIOBlockReq *req = opaque; |
96 | 6e02c38d | aliguori | |
97 | 6d519a5f | Stefan Hajnoczi | trace_virtio_blk_rw_complete(req, ret); |
98 | 6d519a5f | Stefan Hajnoczi | |
99 | f35d68f0 | Kevin Wolf | if (ret) {
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100 | 92e3c2a3 | Aurelien Jarno | int is_read = !(ldl_p(&req->out->type) & VIRTIO_BLK_T_OUT);
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101 | f35d68f0 | Kevin Wolf | if (virtio_blk_handle_rw_error(req, -ret, is_read))
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102 | 869a5c6d | aliguori | return;
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103 | 6e02c38d | aliguori | } |
104 | 6e02c38d | aliguori | |
105 | f35d68f0 | Kevin Wolf | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); |
106 | a597e79c | Christoph Hellwig | bdrv_acct_done(req->dev->bs, &req->acct); |
107 | a597e79c | Christoph Hellwig | g_free(req); |
108 | 869a5c6d | aliguori | } |
109 | 6e02c38d | aliguori | |
110 | aa659be3 | Christoph Hellwig | static void virtio_blk_flush_complete(void *opaque, int ret) |
111 | aa659be3 | Christoph Hellwig | { |
112 | aa659be3 | Christoph Hellwig | VirtIOBlockReq *req = opaque; |
113 | aa659be3 | Christoph Hellwig | |
114 | 8c269b54 | Kevin Wolf | if (ret) {
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115 | 8c269b54 | Kevin Wolf | if (virtio_blk_handle_rw_error(req, -ret, 0)) { |
116 | 8c269b54 | Kevin Wolf | return;
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117 | 8c269b54 | Kevin Wolf | } |
118 | 8c269b54 | Kevin Wolf | } |
119 | 8c269b54 | Kevin Wolf | |
120 | 8c269b54 | Kevin Wolf | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); |
121 | a597e79c | Christoph Hellwig | bdrv_acct_done(req->dev->bs, &req->acct); |
122 | a597e79c | Christoph Hellwig | g_free(req); |
123 | aa659be3 | Christoph Hellwig | } |
124 | aa659be3 | Christoph Hellwig | |
125 | 869a5c6d | aliguori | static VirtIOBlockReq *virtio_blk_alloc_request(VirtIOBlock *s)
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126 | 869a5c6d | aliguori | { |
127 | 7267c094 | Anthony Liguori | VirtIOBlockReq *req = g_malloc(sizeof(*req));
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128 | 487414f1 | aliguori | req->dev = s; |
129 | de6c8042 | Stefan Hajnoczi | req->qiov.size = 0;
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130 | de6c8042 | Stefan Hajnoczi | req->next = NULL;
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131 | 869a5c6d | aliguori | return req;
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132 | 6e02c38d | aliguori | } |
133 | 6e02c38d | aliguori | |
134 | 6e02c38d | aliguori | static VirtIOBlockReq *virtio_blk_get_request(VirtIOBlock *s)
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135 | 6e02c38d | aliguori | { |
136 | 869a5c6d | aliguori | VirtIOBlockReq *req = virtio_blk_alloc_request(s); |
137 | 6e02c38d | aliguori | |
138 | 869a5c6d | aliguori | if (req != NULL) { |
139 | 869a5c6d | aliguori | if (!virtqueue_pop(s->vq, &req->elem)) {
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140 | 7267c094 | Anthony Liguori | g_free(req); |
141 | 869a5c6d | aliguori | return NULL; |
142 | 869a5c6d | aliguori | } |
143 | 6e02c38d | aliguori | } |
144 | 6e02c38d | aliguori | |
145 | 6e02c38d | aliguori | return req;
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146 | 6e02c38d | aliguori | } |
147 | 6e02c38d | aliguori | |
148 | 1063b8b1 | Christoph Hellwig | #ifdef __linux__
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149 | 1063b8b1 | Christoph Hellwig | static void virtio_blk_handle_scsi(VirtIOBlockReq *req) |
150 | 1063b8b1 | Christoph Hellwig | { |
151 | 1063b8b1 | Christoph Hellwig | struct sg_io_hdr hdr;
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152 | 4277906d | Christoph Hellwig | int ret;
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153 | 1063b8b1 | Christoph Hellwig | int status;
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154 | 1063b8b1 | Christoph Hellwig | int i;
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155 | 1063b8b1 | Christoph Hellwig | |
156 | 1ba1f2e3 | Paolo Bonzini | if ((req->dev->vdev.guest_features & (1 << VIRTIO_BLK_F_SCSI)) == 0) { |
157 | 1ba1f2e3 | Paolo Bonzini | virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); |
158 | 1ba1f2e3 | Paolo Bonzini | g_free(req); |
159 | 1ba1f2e3 | Paolo Bonzini | return;
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160 | 1ba1f2e3 | Paolo Bonzini | } |
161 | 1ba1f2e3 | Paolo Bonzini | |
162 | 1063b8b1 | Christoph Hellwig | /*
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163 | 1063b8b1 | Christoph Hellwig | * We require at least one output segment each for the virtio_blk_outhdr
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164 | 1063b8b1 | Christoph Hellwig | * and the SCSI command block.
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165 | 1063b8b1 | Christoph Hellwig | *
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166 | 1063b8b1 | Christoph Hellwig | * We also at least require the virtio_blk_inhdr, the virtio_scsi_inhdr
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167 | 1063b8b1 | Christoph Hellwig | * and the sense buffer pointer in the input segments.
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168 | 1063b8b1 | Christoph Hellwig | */
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169 | 1063b8b1 | Christoph Hellwig | if (req->elem.out_num < 2 || req->elem.in_num < 3) { |
170 | 1063b8b1 | Christoph Hellwig | virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); |
171 | a597e79c | Christoph Hellwig | g_free(req); |
172 | 1063b8b1 | Christoph Hellwig | return;
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173 | 1063b8b1 | Christoph Hellwig | } |
174 | 1063b8b1 | Christoph Hellwig | |
175 | 1063b8b1 | Christoph Hellwig | /*
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176 | 1063b8b1 | Christoph Hellwig | * No support for bidirection commands yet.
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177 | 1063b8b1 | Christoph Hellwig | */
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178 | 1063b8b1 | Christoph Hellwig | if (req->elem.out_num > 2 && req->elem.in_num > 3) { |
179 | 1063b8b1 | Christoph Hellwig | virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); |
180 | a597e79c | Christoph Hellwig | g_free(req); |
181 | 1063b8b1 | Christoph Hellwig | return;
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182 | 1063b8b1 | Christoph Hellwig | } |
183 | 1063b8b1 | Christoph Hellwig | |
184 | 1063b8b1 | Christoph Hellwig | /*
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185 | 1063b8b1 | Christoph Hellwig | * The scsi inhdr is placed in the second-to-last input segment, just
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186 | 1063b8b1 | Christoph Hellwig | * before the regular inhdr.
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187 | 1063b8b1 | Christoph Hellwig | */
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188 | 1063b8b1 | Christoph Hellwig | req->scsi = (void *)req->elem.in_sg[req->elem.in_num - 2].iov_base; |
189 | 1063b8b1 | Christoph Hellwig | |
190 | 1063b8b1 | Christoph Hellwig | memset(&hdr, 0, sizeof(struct sg_io_hdr)); |
191 | 1063b8b1 | Christoph Hellwig | hdr.interface_id = 'S';
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192 | 1063b8b1 | Christoph Hellwig | hdr.cmd_len = req->elem.out_sg[1].iov_len;
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193 | 1063b8b1 | Christoph Hellwig | hdr.cmdp = req->elem.out_sg[1].iov_base;
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194 | 1063b8b1 | Christoph Hellwig | hdr.dxfer_len = 0;
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195 | 1063b8b1 | Christoph Hellwig | |
196 | 1063b8b1 | Christoph Hellwig | if (req->elem.out_num > 2) { |
197 | 1063b8b1 | Christoph Hellwig | /*
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198 | 1063b8b1 | Christoph Hellwig | * If there are more than the minimally required 2 output segments
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199 | 1063b8b1 | Christoph Hellwig | * there is write payload starting from the third iovec.
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200 | 1063b8b1 | Christoph Hellwig | */
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201 | 1063b8b1 | Christoph Hellwig | hdr.dxfer_direction = SG_DXFER_TO_DEV; |
202 | 1063b8b1 | Christoph Hellwig | hdr.iovec_count = req->elem.out_num - 2;
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203 | 1063b8b1 | Christoph Hellwig | |
204 | 1063b8b1 | Christoph Hellwig | for (i = 0; i < hdr.iovec_count; i++) |
205 | 1063b8b1 | Christoph Hellwig | hdr.dxfer_len += req->elem.out_sg[i + 2].iov_len;
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206 | 1063b8b1 | Christoph Hellwig | |
207 | 1063b8b1 | Christoph Hellwig | hdr.dxferp = req->elem.out_sg + 2;
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208 | 1063b8b1 | Christoph Hellwig | |
209 | 1063b8b1 | Christoph Hellwig | } else if (req->elem.in_num > 3) { |
210 | 1063b8b1 | Christoph Hellwig | /*
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211 | 1063b8b1 | Christoph Hellwig | * If we have more than 3 input segments the guest wants to actually
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212 | 1063b8b1 | Christoph Hellwig | * read data.
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213 | 1063b8b1 | Christoph Hellwig | */
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214 | 1063b8b1 | Christoph Hellwig | hdr.dxfer_direction = SG_DXFER_FROM_DEV; |
215 | 1063b8b1 | Christoph Hellwig | hdr.iovec_count = req->elem.in_num - 3;
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216 | 1063b8b1 | Christoph Hellwig | for (i = 0; i < hdr.iovec_count; i++) |
217 | 1063b8b1 | Christoph Hellwig | hdr.dxfer_len += req->elem.in_sg[i].iov_len; |
218 | 1063b8b1 | Christoph Hellwig | |
219 | 1063b8b1 | Christoph Hellwig | hdr.dxferp = req->elem.in_sg; |
220 | 1063b8b1 | Christoph Hellwig | } else {
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221 | 1063b8b1 | Christoph Hellwig | /*
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222 | 1063b8b1 | Christoph Hellwig | * Some SCSI commands don't actually transfer any data.
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223 | 1063b8b1 | Christoph Hellwig | */
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224 | 1063b8b1 | Christoph Hellwig | hdr.dxfer_direction = SG_DXFER_NONE; |
225 | 1063b8b1 | Christoph Hellwig | } |
226 | 1063b8b1 | Christoph Hellwig | |
227 | 1063b8b1 | Christoph Hellwig | hdr.sbp = req->elem.in_sg[req->elem.in_num - 3].iov_base;
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228 | 1063b8b1 | Christoph Hellwig | hdr.mx_sb_len = req->elem.in_sg[req->elem.in_num - 3].iov_len;
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229 | 1063b8b1 | Christoph Hellwig | |
230 | 1063b8b1 | Christoph Hellwig | ret = bdrv_ioctl(req->dev->bs, SG_IO, &hdr); |
231 | 1063b8b1 | Christoph Hellwig | if (ret) {
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232 | 1063b8b1 | Christoph Hellwig | status = VIRTIO_BLK_S_UNSUPP; |
233 | 1063b8b1 | Christoph Hellwig | hdr.status = ret; |
234 | 1063b8b1 | Christoph Hellwig | hdr.resid = hdr.dxfer_len; |
235 | 1063b8b1 | Christoph Hellwig | } else if (hdr.status) { |
236 | 1063b8b1 | Christoph Hellwig | status = VIRTIO_BLK_S_IOERR; |
237 | 1063b8b1 | Christoph Hellwig | } else {
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238 | 1063b8b1 | Christoph Hellwig | status = VIRTIO_BLK_S_OK; |
239 | 1063b8b1 | Christoph Hellwig | } |
240 | 1063b8b1 | Christoph Hellwig | |
241 | 5bb23927 | Paolo Bonzini | /*
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242 | 5bb23927 | Paolo Bonzini | * From SCSI-Generic-HOWTO: "Some lower level drivers (e.g. ide-scsi)
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243 | 5bb23927 | Paolo Bonzini | * clear the masked_status field [hence status gets cleared too, see
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244 | 5bb23927 | Paolo Bonzini | * block/scsi_ioctl.c] even when a CHECK_CONDITION or COMMAND_TERMINATED
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245 | 5bb23927 | Paolo Bonzini | * status has occurred. However they do set DRIVER_SENSE in driver_status
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246 | 5bb23927 | Paolo Bonzini | * field. Also a (sb_len_wr > 0) indicates there is a sense buffer.
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247 | 5bb23927 | Paolo Bonzini | */
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248 | 5bb23927 | Paolo Bonzini | if (hdr.status == 0 && hdr.sb_len_wr > 0) { |
249 | 5bb23927 | Paolo Bonzini | hdr.status = CHECK_CONDITION; |
250 | 5bb23927 | Paolo Bonzini | } |
251 | 5bb23927 | Paolo Bonzini | |
252 | 5bb23927 | Paolo Bonzini | stl_p(&req->scsi->errors, |
253 | 5bb23927 | Paolo Bonzini | hdr.status | (hdr.msg_status << 8) |
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254 | 5bb23927 | Paolo Bonzini | (hdr.host_status << 16) | (hdr.driver_status << 24)); |
255 | 92e3c2a3 | Aurelien Jarno | stl_p(&req->scsi->residual, hdr.resid); |
256 | 92e3c2a3 | Aurelien Jarno | stl_p(&req->scsi->sense_len, hdr.sb_len_wr); |
257 | 92e3c2a3 | Aurelien Jarno | stl_p(&req->scsi->data_len, hdr.dxfer_len); |
258 | 1063b8b1 | Christoph Hellwig | |
259 | 1063b8b1 | Christoph Hellwig | virtio_blk_req_complete(req, status); |
260 | a597e79c | Christoph Hellwig | g_free(req); |
261 | 1063b8b1 | Christoph Hellwig | } |
262 | 1063b8b1 | Christoph Hellwig | #else
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263 | 1063b8b1 | Christoph Hellwig | static void virtio_blk_handle_scsi(VirtIOBlockReq *req) |
264 | 1063b8b1 | Christoph Hellwig | { |
265 | 1063b8b1 | Christoph Hellwig | virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); |
266 | a597e79c | Christoph Hellwig | g_free(req); |
267 | 1063b8b1 | Christoph Hellwig | } |
268 | 1063b8b1 | Christoph Hellwig | #endif /* __linux__ */ |
269 | 1063b8b1 | Christoph Hellwig | |
270 | c20fd872 | Christoph Hellwig | typedef struct MultiReqBuffer { |
271 | c20fd872 | Christoph Hellwig | BlockRequest blkreq[32];
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272 | c20fd872 | Christoph Hellwig | unsigned int num_writes; |
273 | c20fd872 | Christoph Hellwig | } MultiReqBuffer; |
274 | c20fd872 | Christoph Hellwig | |
275 | c20fd872 | Christoph Hellwig | static void virtio_submit_multiwrite(BlockDriverState *bs, MultiReqBuffer *mrb) |
276 | 869a5c6d | aliguori | { |
277 | 91553dcc | Kevin Wolf | int i, ret;
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278 | 91553dcc | Kevin Wolf | |
279 | c20fd872 | Christoph Hellwig | if (!mrb->num_writes) {
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280 | c20fd872 | Christoph Hellwig | return;
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281 | c20fd872 | Christoph Hellwig | } |
282 | c20fd872 | Christoph Hellwig | |
283 | c20fd872 | Christoph Hellwig | ret = bdrv_aio_multiwrite(bs, mrb->blkreq, mrb->num_writes); |
284 | 91553dcc | Kevin Wolf | if (ret != 0) { |
285 | c20fd872 | Christoph Hellwig | for (i = 0; i < mrb->num_writes; i++) { |
286 | c20fd872 | Christoph Hellwig | if (mrb->blkreq[i].error) {
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287 | c20fd872 | Christoph Hellwig | virtio_blk_rw_complete(mrb->blkreq[i].opaque, -EIO); |
288 | 91553dcc | Kevin Wolf | } |
289 | 91553dcc | Kevin Wolf | } |
290 | 91553dcc | Kevin Wolf | } |
291 | c20fd872 | Christoph Hellwig | |
292 | c20fd872 | Christoph Hellwig | mrb->num_writes = 0;
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293 | 91553dcc | Kevin Wolf | } |
294 | 87b245db | Christoph Hellwig | |
295 | c20fd872 | Christoph Hellwig | static void virtio_blk_handle_flush(VirtIOBlockReq *req, MultiReqBuffer *mrb) |
296 | aa659be3 | Christoph Hellwig | { |
297 | a597e79c | Christoph Hellwig | bdrv_acct_start(req->dev->bs, &req->acct, 0, BDRV_ACCT_FLUSH);
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298 | a597e79c | Christoph Hellwig | |
299 | 618fbb84 | Christoph Hellwig | /*
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300 | 618fbb84 | Christoph Hellwig | * Make sure all outstanding writes are posted to the backing device.
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301 | 618fbb84 | Christoph Hellwig | */
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302 | c20fd872 | Christoph Hellwig | virtio_submit_multiwrite(req->dev->bs, mrb); |
303 | ad54ae80 | Paolo Bonzini | bdrv_aio_flush(req->dev->bs, virtio_blk_flush_complete, req); |
304 | aa659be3 | Christoph Hellwig | } |
305 | aa659be3 | Christoph Hellwig | |
306 | c20fd872 | Christoph Hellwig | static void virtio_blk_handle_write(VirtIOBlockReq *req, MultiReqBuffer *mrb) |
307 | 91553dcc | Kevin Wolf | { |
308 | c20fd872 | Christoph Hellwig | BlockRequest *blkreq; |
309 | 92e3c2a3 | Aurelien Jarno | uint64_t sector; |
310 | c20fd872 | Christoph Hellwig | |
311 | 92e3c2a3 | Aurelien Jarno | sector = ldq_p(&req->out->sector); |
312 | 6d519a5f | Stefan Hajnoczi | |
313 | a597e79c | Christoph Hellwig | bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_WRITE); |
314 | a597e79c | Christoph Hellwig | |
315 | 92e3c2a3 | Aurelien Jarno | trace_virtio_blk_handle_write(req, sector, req->qiov.size / 512);
|
316 | 92e3c2a3 | Aurelien Jarno | |
317 | 92e3c2a3 | Aurelien Jarno | if (sector & req->dev->sector_mask) {
|
318 | 8cfacf07 | Christoph Hellwig | virtio_blk_rw_complete(req, -EIO); |
319 | 8cfacf07 | Christoph Hellwig | return;
|
320 | 8cfacf07 | Christoph Hellwig | } |
321 | 52c05023 | Christoph Hellwig | if (req->qiov.size % req->dev->conf->logical_block_size) {
|
322 | 52c05023 | Christoph Hellwig | virtio_blk_rw_complete(req, -EIO); |
323 | 52c05023 | Christoph Hellwig | return;
|
324 | 52c05023 | Christoph Hellwig | } |
325 | 8cfacf07 | Christoph Hellwig | |
326 | c20fd872 | Christoph Hellwig | if (mrb->num_writes == 32) { |
327 | c20fd872 | Christoph Hellwig | virtio_submit_multiwrite(req->dev->bs, mrb); |
328 | 87b245db | Christoph Hellwig | } |
329 | 91553dcc | Kevin Wolf | |
330 | c20fd872 | Christoph Hellwig | blkreq = &mrb->blkreq[mrb->num_writes]; |
331 | 92e3c2a3 | Aurelien Jarno | blkreq->sector = sector; |
332 | c20fd872 | Christoph Hellwig | blkreq->nb_sectors = req->qiov.size / BDRV_SECTOR_SIZE; |
333 | c20fd872 | Christoph Hellwig | blkreq->qiov = &req->qiov; |
334 | c20fd872 | Christoph Hellwig | blkreq->cb = virtio_blk_rw_complete; |
335 | c20fd872 | Christoph Hellwig | blkreq->opaque = req; |
336 | c20fd872 | Christoph Hellwig | blkreq->error = 0;
|
337 | 91553dcc | Kevin Wolf | |
338 | c20fd872 | Christoph Hellwig | mrb->num_writes++; |
339 | d28a1b6e | aliguori | } |
340 | 869a5c6d | aliguori | |
341 | d28a1b6e | aliguori | static void virtio_blk_handle_read(VirtIOBlockReq *req) |
342 | d28a1b6e | aliguori | { |
343 | 92e3c2a3 | Aurelien Jarno | uint64_t sector; |
344 | 92e3c2a3 | Aurelien Jarno | |
345 | 92e3c2a3 | Aurelien Jarno | sector = ldq_p(&req->out->sector); |
346 | 87b245db | Christoph Hellwig | |
347 | a597e79c | Christoph Hellwig | bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_READ); |
348 | a597e79c | Christoph Hellwig | |
349 | 81b6b9fa | Stefan Hajnoczi | trace_virtio_blk_handle_read(req, sector, req->qiov.size / 512);
|
350 | 81b6b9fa | Stefan Hajnoczi | |
351 | 92e3c2a3 | Aurelien Jarno | if (sector & req->dev->sector_mask) {
|
352 | 8cfacf07 | Christoph Hellwig | virtio_blk_rw_complete(req, -EIO); |
353 | 8cfacf07 | Christoph Hellwig | return;
|
354 | 8cfacf07 | Christoph Hellwig | } |
355 | 52c05023 | Christoph Hellwig | if (req->qiov.size % req->dev->conf->logical_block_size) {
|
356 | 52c05023 | Christoph Hellwig | virtio_blk_rw_complete(req, -EIO); |
357 | 52c05023 | Christoph Hellwig | return;
|
358 | 52c05023 | Christoph Hellwig | } |
359 | ad54ae80 | Paolo Bonzini | bdrv_aio_readv(req->dev->bs, sector, &req->qiov, |
360 | ad54ae80 | Paolo Bonzini | req->qiov.size / BDRV_SECTOR_SIZE, |
361 | ad54ae80 | Paolo Bonzini | virtio_blk_rw_complete, req); |
362 | 869a5c6d | aliguori | } |
363 | 869a5c6d | aliguori | |
364 | bc6694d4 | Kevin Wolf | static void virtio_blk_handle_request(VirtIOBlockReq *req, |
365 | bc6694d4 | Kevin Wolf | MultiReqBuffer *mrb) |
366 | bc6694d4 | Kevin Wolf | { |
367 | 92e3c2a3 | Aurelien Jarno | uint32_t type; |
368 | 92e3c2a3 | Aurelien Jarno | |
369 | bc6694d4 | Kevin Wolf | if (req->elem.out_num < 1 || req->elem.in_num < 1) { |
370 | 870cef1d | Stefan Hajnoczi | error_report("virtio-blk missing headers");
|
371 | bc6694d4 | Kevin Wolf | exit(1);
|
372 | bc6694d4 | Kevin Wolf | } |
373 | bc6694d4 | Kevin Wolf | |
374 | bc6694d4 | Kevin Wolf | if (req->elem.out_sg[0].iov_len < sizeof(*req->out) || |
375 | bc6694d4 | Kevin Wolf | req->elem.in_sg[req->elem.in_num - 1].iov_len < sizeof(*req->in)) { |
376 | 870cef1d | Stefan Hajnoczi | error_report("virtio-blk header not in correct element");
|
377 | bc6694d4 | Kevin Wolf | exit(1);
|
378 | bc6694d4 | Kevin Wolf | } |
379 | bc6694d4 | Kevin Wolf | |
380 | bc6694d4 | Kevin Wolf | req->out = (void *)req->elem.out_sg[0].iov_base; |
381 | bc6694d4 | Kevin Wolf | req->in = (void *)req->elem.in_sg[req->elem.in_num - 1].iov_base; |
382 | bc6694d4 | Kevin Wolf | |
383 | 92e3c2a3 | Aurelien Jarno | type = ldl_p(&req->out->type); |
384 | 92e3c2a3 | Aurelien Jarno | |
385 | 92e3c2a3 | Aurelien Jarno | if (type & VIRTIO_BLK_T_FLUSH) {
|
386 | c20fd872 | Christoph Hellwig | virtio_blk_handle_flush(req, mrb); |
387 | 92e3c2a3 | Aurelien Jarno | } else if (type & VIRTIO_BLK_T_SCSI_CMD) { |
388 | bc6694d4 | Kevin Wolf | virtio_blk_handle_scsi(req); |
389 | 92e3c2a3 | Aurelien Jarno | } else if (type & VIRTIO_BLK_T_GET_ID) { |
390 | 2930b313 | john cooper | VirtIOBlock *s = req->dev; |
391 | 2930b313 | john cooper | |
392 | a8686a9b | Markus Armbruster | /*
|
393 | a8686a9b | Markus Armbruster | * NB: per existing s/n string convention the string is
|
394 | a8686a9b | Markus Armbruster | * terminated by '\0' only when shorter than buffer.
|
395 | a8686a9b | Markus Armbruster | */
|
396 | a8686a9b | Markus Armbruster | strncpy(req->elem.in_sg[0].iov_base,
|
397 | a8686a9b | Markus Armbruster | s->serial ? s->serial : "",
|
398 | a8686a9b | Markus Armbruster | MIN(req->elem.in_sg[0].iov_len, VIRTIO_BLK_ID_BYTES));
|
399 | 2930b313 | john cooper | virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); |
400 | a597e79c | Christoph Hellwig | g_free(req); |
401 | 92e3c2a3 | Aurelien Jarno | } else if (type & VIRTIO_BLK_T_OUT) { |
402 | bc6694d4 | Kevin Wolf | qemu_iovec_init_external(&req->qiov, &req->elem.out_sg[1],
|
403 | bc6694d4 | Kevin Wolf | req->elem.out_num - 1);
|
404 | c20fd872 | Christoph Hellwig | virtio_blk_handle_write(req, mrb); |
405 | bc6694d4 | Kevin Wolf | } else {
|
406 | bc6694d4 | Kevin Wolf | qemu_iovec_init_external(&req->qiov, &req->elem.in_sg[0],
|
407 | bc6694d4 | Kevin Wolf | req->elem.in_num - 1);
|
408 | bc6694d4 | Kevin Wolf | virtio_blk_handle_read(req); |
409 | bc6694d4 | Kevin Wolf | } |
410 | bc6694d4 | Kevin Wolf | } |
411 | bc6694d4 | Kevin Wolf | |
412 | 6e02c38d | aliguori | static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq) |
413 | 6e02c38d | aliguori | { |
414 | 6e02c38d | aliguori | VirtIOBlock *s = to_virtio_blk(vdev); |
415 | 6e02c38d | aliguori | VirtIOBlockReq *req; |
416 | bc6694d4 | Kevin Wolf | MultiReqBuffer mrb = { |
417 | bc6694d4 | Kevin Wolf | .num_writes = 0,
|
418 | bc6694d4 | Kevin Wolf | }; |
419 | 6e02c38d | aliguori | |
420 | 6e02c38d | aliguori | while ((req = virtio_blk_get_request(s))) {
|
421 | bc6694d4 | Kevin Wolf | virtio_blk_handle_request(req, &mrb); |
422 | 6e02c38d | aliguori | } |
423 | 91553dcc | Kevin Wolf | |
424 | c20fd872 | Christoph Hellwig | virtio_submit_multiwrite(s->bs, &mrb); |
425 | 91553dcc | Kevin Wolf | |
426 | 6e02c38d | aliguori | /*
|
427 | 6e02c38d | aliguori | * FIXME: Want to check for completions before returning to guest mode,
|
428 | 6e02c38d | aliguori | * so cached reads and writes are reported as quickly as possible. But
|
429 | 6e02c38d | aliguori | * that should be done in the generic block layer.
|
430 | 6e02c38d | aliguori | */
|
431 | 6e02c38d | aliguori | } |
432 | 6e02c38d | aliguori | |
433 | 213189ab | Markus Armbruster | static void virtio_blk_dma_restart_bh(void *opaque) |
434 | 869a5c6d | aliguori | { |
435 | 869a5c6d | aliguori | VirtIOBlock *s = opaque; |
436 | 869a5c6d | aliguori | VirtIOBlockReq *req = s->rq; |
437 | f1b52868 | Kevin Wolf | MultiReqBuffer mrb = { |
438 | f1b52868 | Kevin Wolf | .num_writes = 0,
|
439 | f1b52868 | Kevin Wolf | }; |
440 | 869a5c6d | aliguori | |
441 | 213189ab | Markus Armbruster | qemu_bh_delete(s->bh); |
442 | 213189ab | Markus Armbruster | s->bh = NULL;
|
443 | 869a5c6d | aliguori | |
444 | 869a5c6d | aliguori | s->rq = NULL;
|
445 | 869a5c6d | aliguori | |
446 | 869a5c6d | aliguori | while (req) {
|
447 | f1b52868 | Kevin Wolf | virtio_blk_handle_request(req, &mrb); |
448 | 869a5c6d | aliguori | req = req->next; |
449 | 869a5c6d | aliguori | } |
450 | f1b52868 | Kevin Wolf | |
451 | c20fd872 | Christoph Hellwig | virtio_submit_multiwrite(s->bs, &mrb); |
452 | 869a5c6d | aliguori | } |
453 | 869a5c6d | aliguori | |
454 | 1dfb4dd9 | Luiz Capitulino | static void virtio_blk_dma_restart_cb(void *opaque, int running, |
455 | 1dfb4dd9 | Luiz Capitulino | RunState state) |
456 | 213189ab | Markus Armbruster | { |
457 | 213189ab | Markus Armbruster | VirtIOBlock *s = opaque; |
458 | 213189ab | Markus Armbruster | |
459 | 213189ab | Markus Armbruster | if (!running)
|
460 | 213189ab | Markus Armbruster | return;
|
461 | 213189ab | Markus Armbruster | |
462 | 213189ab | Markus Armbruster | if (!s->bh) {
|
463 | 213189ab | Markus Armbruster | s->bh = qemu_bh_new(virtio_blk_dma_restart_bh, s); |
464 | 213189ab | Markus Armbruster | qemu_bh_schedule(s->bh); |
465 | 213189ab | Markus Armbruster | } |
466 | 213189ab | Markus Armbruster | } |
467 | 213189ab | Markus Armbruster | |
468 | 6e02c38d | aliguori | static void virtio_blk_reset(VirtIODevice *vdev) |
469 | 6e02c38d | aliguori | { |
470 | 6e02c38d | aliguori | /*
|
471 | 6e02c38d | aliguori | * This should cancel pending requests, but can't do nicely until there
|
472 | 6e02c38d | aliguori | * are per-device request lists.
|
473 | 6e02c38d | aliguori | */
|
474 | 922453bc | Stefan Hajnoczi | bdrv_drain_all(); |
475 | 6e02c38d | aliguori | } |
476 | 6e02c38d | aliguori | |
477 | bf011293 | john cooper | /* coalesce internal state, copy to pci i/o region 0
|
478 | bf011293 | john cooper | */
|
479 | 6e02c38d | aliguori | static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config) |
480 | 6e02c38d | aliguori | { |
481 | 6e02c38d | aliguori | VirtIOBlock *s = to_virtio_blk(vdev); |
482 | 6e02c38d | aliguori | struct virtio_blk_config blkcfg;
|
483 | 6e02c38d | aliguori | uint64_t capacity; |
484 | 6e02c38d | aliguori | int cylinders, heads, secs;
|
485 | 3a395142 | Paolo Bonzini | int blk_size = s->conf->logical_block_size;
|
486 | 6e02c38d | aliguori | |
487 | 6e02c38d | aliguori | bdrv_get_geometry(s->bs, &capacity); |
488 | 6e02c38d | aliguori | bdrv_get_geometry_hint(s->bs, &cylinders, &heads, &secs); |
489 | 5c5dafdc | Gerd Hoffmann | memset(&blkcfg, 0, sizeof(blkcfg)); |
490 | 6e02c38d | aliguori | stq_raw(&blkcfg.capacity, capacity); |
491 | 6e02c38d | aliguori | stl_raw(&blkcfg.seg_max, 128 - 2); |
492 | 6e02c38d | aliguori | stw_raw(&blkcfg.cylinders, cylinders); |
493 | 3a395142 | Paolo Bonzini | stl_raw(&blkcfg.blk_size, blk_size); |
494 | 3a395142 | Paolo Bonzini | stw_raw(&blkcfg.min_io_size, s->conf->min_io_size / blk_size); |
495 | 3a395142 | Paolo Bonzini | stw_raw(&blkcfg.opt_io_size, s->conf->opt_io_size / blk_size); |
496 | 6e02c38d | aliguori | blkcfg.heads = heads; |
497 | 8cfacf07 | Christoph Hellwig | blkcfg.sectors = secs & ~s->sector_mask; |
498 | c7085da7 | Blue Swirl | blkcfg.size_max = 0;
|
499 | 9752c371 | Christoph Hellwig | blkcfg.physical_block_exp = get_physical_block_exp(s->conf); |
500 | 9752c371 | Christoph Hellwig | blkcfg.alignment_offset = 0;
|
501 | 37d5ddd6 | hch@lst.de | memcpy(config, &blkcfg, sizeof(struct virtio_blk_config)); |
502 | 6e02c38d | aliguori | } |
503 | 6e02c38d | aliguori | |
504 | 8172539d | Michael S. Tsirkin | static uint32_t virtio_blk_get_features(VirtIODevice *vdev, uint32_t features)
|
505 | 6e02c38d | aliguori | { |
506 | bf011293 | john cooper | VirtIOBlock *s = to_virtio_blk(vdev); |
507 | 1063b8b1 | Christoph Hellwig | |
508 | 1063b8b1 | Christoph Hellwig | features |= (1 << VIRTIO_BLK_F_SEG_MAX);
|
509 | 1063b8b1 | Christoph Hellwig | features |= (1 << VIRTIO_BLK_F_GEOMETRY);
|
510 | 9752c371 | Christoph Hellwig | features |= (1 << VIRTIO_BLK_F_TOPOLOGY);
|
511 | 8cfacf07 | Christoph Hellwig | features |= (1 << VIRTIO_BLK_F_BLK_SIZE);
|
512 | aa659be3 | Christoph Hellwig | |
513 | aa659be3 | Christoph Hellwig | if (bdrv_enable_write_cache(s->bs))
|
514 | aa659be3 | Christoph Hellwig | features |= (1 << VIRTIO_BLK_F_WCACHE);
|
515 | c79662f7 | Naphtali Sprei | |
516 | c79662f7 | Naphtali Sprei | if (bdrv_is_read_only(s->bs))
|
517 | c79662f7 | Naphtali Sprei | features |= 1 << VIRTIO_BLK_F_RO;
|
518 | 1063b8b1 | Christoph Hellwig | |
519 | 1063b8b1 | Christoph Hellwig | return features;
|
520 | 6e02c38d | aliguori | } |
521 | 6e02c38d | aliguori | |
522 | 6e02c38d | aliguori | static void virtio_blk_save(QEMUFile *f, void *opaque) |
523 | 6e02c38d | aliguori | { |
524 | 6e02c38d | aliguori | VirtIOBlock *s = opaque; |
525 | 869a5c6d | aliguori | VirtIOBlockReq *req = s->rq; |
526 | 869a5c6d | aliguori | |
527 | 6e02c38d | aliguori | virtio_save(&s->vdev, f); |
528 | 869a5c6d | aliguori | |
529 | 869a5c6d | aliguori | while (req) {
|
530 | 869a5c6d | aliguori | qemu_put_sbyte(f, 1);
|
531 | 869a5c6d | aliguori | qemu_put_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem)); |
532 | 869a5c6d | aliguori | req = req->next; |
533 | 869a5c6d | aliguori | } |
534 | 869a5c6d | aliguori | qemu_put_sbyte(f, 0);
|
535 | 6e02c38d | aliguori | } |
536 | 6e02c38d | aliguori | |
537 | 6e02c38d | aliguori | static int virtio_blk_load(QEMUFile *f, void *opaque, int version_id) |
538 | 6e02c38d | aliguori | { |
539 | 6e02c38d | aliguori | VirtIOBlock *s = opaque; |
540 | 6e02c38d | aliguori | |
541 | 869a5c6d | aliguori | if (version_id != 2) |
542 | 6e02c38d | aliguori | return -EINVAL;
|
543 | 6e02c38d | aliguori | |
544 | 6e02c38d | aliguori | virtio_load(&s->vdev, f); |
545 | 869a5c6d | aliguori | while (qemu_get_sbyte(f)) {
|
546 | 869a5c6d | aliguori | VirtIOBlockReq *req = virtio_blk_alloc_request(s); |
547 | 869a5c6d | aliguori | qemu_get_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem)); |
548 | 869a5c6d | aliguori | req->next = s->rq; |
549 | 20a81e4d | Yoshiaki Tamura | s->rq = req; |
550 | b6a4805b | Kevin Wolf | |
551 | b6a4805b | Kevin Wolf | virtqueue_map_sg(req->elem.in_sg, req->elem.in_addr, |
552 | b6a4805b | Kevin Wolf | req->elem.in_num, 1);
|
553 | b6a4805b | Kevin Wolf | virtqueue_map_sg(req->elem.out_sg, req->elem.out_addr, |
554 | b6a4805b | Kevin Wolf | req->elem.out_num, 0);
|
555 | 869a5c6d | aliguori | } |
556 | 6e02c38d | aliguori | |
557 | 6e02c38d | aliguori | return 0; |
558 | 6e02c38d | aliguori | } |
559 | 6e02c38d | aliguori | |
560 | 145feb17 | Markus Armbruster | static void virtio_blk_resize(void *opaque) |
561 | e5051fc7 | Christoph Hellwig | { |
562 | e5051fc7 | Christoph Hellwig | VirtIOBlock *s = opaque; |
563 | e5051fc7 | Christoph Hellwig | |
564 | 145feb17 | Markus Armbruster | virtio_notify_config(&s->vdev); |
565 | e5051fc7 | Christoph Hellwig | } |
566 | e5051fc7 | Christoph Hellwig | |
567 | 0e49de52 | Markus Armbruster | static const BlockDevOps virtio_block_ops = { |
568 | 145feb17 | Markus Armbruster | .resize_cb = virtio_blk_resize, |
569 | 0e49de52 | Markus Armbruster | }; |
570 | 0e49de52 | Markus Armbruster | |
571 | a8686a9b | Markus Armbruster | VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf, |
572 | a8686a9b | Markus Armbruster | char **serial)
|
573 | 6e02c38d | aliguori | { |
574 | 6e02c38d | aliguori | VirtIOBlock *s; |
575 | 6e02c38d | aliguori | int cylinders, heads, secs;
|
576 | 6e02c38d | aliguori | static int virtio_blk_id; |
577 | 2930b313 | john cooper | DriveInfo *dinfo; |
578 | cf21e106 | Paul Brook | |
579 | d75d25e3 | Markus Armbruster | if (!conf->bs) {
|
580 | 6a84cb1f | Markus Armbruster | error_report("drive property not set");
|
581 | d75d25e3 | Markus Armbruster | return NULL; |
582 | d75d25e3 | Markus Armbruster | } |
583 | 98f28ad7 | Markus Armbruster | if (!bdrv_is_inserted(conf->bs)) {
|
584 | 98f28ad7 | Markus Armbruster | error_report("Device needs media, but drive is empty");
|
585 | 98f28ad7 | Markus Armbruster | return NULL; |
586 | 98f28ad7 | Markus Armbruster | } |
587 | d75d25e3 | Markus Armbruster | |
588 | a8686a9b | Markus Armbruster | if (!*serial) {
|
589 | a8686a9b | Markus Armbruster | /* try to fall back to value set with legacy -drive serial=... */
|
590 | a8686a9b | Markus Armbruster | dinfo = drive_get_by_blockdev(conf->bs); |
591 | a8686a9b | Markus Armbruster | if (*dinfo->serial) {
|
592 | a8686a9b | Markus Armbruster | *serial = strdup(dinfo->serial); |
593 | a8686a9b | Markus Armbruster | } |
594 | a8686a9b | Markus Armbruster | } |
595 | a8686a9b | Markus Armbruster | |
596 | 53c25cea | Paul Brook | s = (VirtIOBlock *)virtio_common_init("virtio-blk", VIRTIO_ID_BLOCK,
|
597 | 37d5ddd6 | hch@lst.de | sizeof(struct virtio_blk_config), |
598 | 53c25cea | Paul Brook | sizeof(VirtIOBlock));
|
599 | 6e02c38d | aliguori | |
600 | 6e02c38d | aliguori | s->vdev.get_config = virtio_blk_update_config; |
601 | 6e02c38d | aliguori | s->vdev.get_features = virtio_blk_get_features; |
602 | 6e02c38d | aliguori | s->vdev.reset = virtio_blk_reset; |
603 | f8b6cc00 | Markus Armbruster | s->bs = conf->bs; |
604 | 9752c371 | Christoph Hellwig | s->conf = conf; |
605 | a8686a9b | Markus Armbruster | s->serial = *serial; |
606 | 869a5c6d | aliguori | s->rq = NULL;
|
607 | 1573a35d | Jes Sorensen | s->sector_mask = (s->conf->logical_block_size / BDRV_SECTOR_SIZE) - 1;
|
608 | 6e02c38d | aliguori | bdrv_guess_geometry(s->bs, &cylinders, &heads, &secs); |
609 | 6e02c38d | aliguori | |
610 | 6e02c38d | aliguori | s->vq = virtio_add_queue(&s->vdev, 128, virtio_blk_handle_output);
|
611 | 6e02c38d | aliguori | |
612 | 869a5c6d | aliguori | qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s); |
613 | 9d0d3138 | Alex Williamson | s->qdev = dev; |
614 | 0be71e32 | Alex Williamson | register_savevm(dev, "virtio-blk", virtio_blk_id++, 2, |
615 | 6e02c38d | aliguori | virtio_blk_save, virtio_blk_load, s); |
616 | 0e49de52 | Markus Armbruster | bdrv_set_dev_ops(s->bs, &virtio_block_ops, s); |
617 | 7b6f9300 | Markus Armbruster | bdrv_set_buffer_alignment(s->bs, conf->logical_block_size); |
618 | 6e02c38d | aliguori | |
619 | af239a62 | Luiz Capitulino | bdrv_iostatus_enable(s->bs); |
620 | 1ca4d09a | Gleb Natapov | add_boot_device_path(conf->bootindex, dev, "/disk@0,0");
|
621 | 1ca4d09a | Gleb Natapov | |
622 | 53c25cea | Paul Brook | return &s->vdev;
|
623 | 6e02c38d | aliguori | } |
624 | 9d0d3138 | Alex Williamson | |
625 | 9d0d3138 | Alex Williamson | void virtio_blk_exit(VirtIODevice *vdev)
|
626 | 9d0d3138 | Alex Williamson | { |
627 | 9d0d3138 | Alex Williamson | VirtIOBlock *s = to_virtio_blk(vdev); |
628 | 9d0d3138 | Alex Williamson | unregister_savevm(s->qdev, "virtio-blk", s);
|
629 | d92551f2 | Amit Shah | virtio_cleanup(vdev); |
630 | 9d0d3138 | Alex Williamson | } |