root / block / qed-table.c @ 0e326109
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1 | 298800ca | Stefan Hajnoczi | /*
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2 | 298800ca | Stefan Hajnoczi | * QEMU Enhanced Disk Format Table I/O
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3 | 298800ca | Stefan Hajnoczi | *
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4 | 298800ca | Stefan Hajnoczi | * Copyright IBM, Corp. 2010
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5 | 298800ca | Stefan Hajnoczi | *
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6 | 298800ca | Stefan Hajnoczi | * Authors:
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7 | 298800ca | Stefan Hajnoczi | * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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8 | 298800ca | Stefan Hajnoczi | * Anthony Liguori <aliguori@us.ibm.com>
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9 | 298800ca | Stefan Hajnoczi | *
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10 | 298800ca | Stefan Hajnoczi | * This work is licensed under the terms of the GNU LGPL, version 2 or later.
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11 | 298800ca | Stefan Hajnoczi | * See the COPYING.LIB file in the top-level directory.
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12 | 298800ca | Stefan Hajnoczi | *
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13 | 298800ca | Stefan Hajnoczi | */
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14 | 298800ca | Stefan Hajnoczi | |
15 | 298800ca | Stefan Hajnoczi | #include "trace.h" |
16 | 298800ca | Stefan Hajnoczi | #include "qemu_socket.h" /* for EINPROGRESS on Windows */ |
17 | 298800ca | Stefan Hajnoczi | #include "qed.h" |
18 | 298800ca | Stefan Hajnoczi | |
19 | 298800ca | Stefan Hajnoczi | typedef struct { |
20 | 298800ca | Stefan Hajnoczi | GenericCB gencb; |
21 | 298800ca | Stefan Hajnoczi | BDRVQEDState *s; |
22 | 298800ca | Stefan Hajnoczi | QEDTable *table; |
23 | 298800ca | Stefan Hajnoczi | |
24 | 298800ca | Stefan Hajnoczi | struct iovec iov;
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25 | 298800ca | Stefan Hajnoczi | QEMUIOVector qiov; |
26 | 298800ca | Stefan Hajnoczi | } QEDReadTableCB; |
27 | 298800ca | Stefan Hajnoczi | |
28 | 298800ca | Stefan Hajnoczi | static void qed_read_table_cb(void *opaque, int ret) |
29 | 298800ca | Stefan Hajnoczi | { |
30 | 298800ca | Stefan Hajnoczi | QEDReadTableCB *read_table_cb = opaque; |
31 | 298800ca | Stefan Hajnoczi | QEDTable *table = read_table_cb->table; |
32 | 298800ca | Stefan Hajnoczi | int noffsets = read_table_cb->iov.iov_len / sizeof(uint64_t); |
33 | 298800ca | Stefan Hajnoczi | int i;
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34 | 298800ca | Stefan Hajnoczi | |
35 | 298800ca | Stefan Hajnoczi | /* Handle I/O error */
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36 | 298800ca | Stefan Hajnoczi | if (ret) {
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37 | 298800ca | Stefan Hajnoczi | goto out;
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38 | 298800ca | Stefan Hajnoczi | } |
39 | 298800ca | Stefan Hajnoczi | |
40 | 298800ca | Stefan Hajnoczi | /* Byteswap offsets */
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41 | 298800ca | Stefan Hajnoczi | for (i = 0; i < noffsets; i++) { |
42 | 298800ca | Stefan Hajnoczi | table->offsets[i] = le64_to_cpu(table->offsets[i]); |
43 | 298800ca | Stefan Hajnoczi | } |
44 | 298800ca | Stefan Hajnoczi | |
45 | 298800ca | Stefan Hajnoczi | out:
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46 | 298800ca | Stefan Hajnoczi | /* Completion */
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47 | 298800ca | Stefan Hajnoczi | trace_qed_read_table_cb(read_table_cb->s, read_table_cb->table, ret); |
48 | 298800ca | Stefan Hajnoczi | gencb_complete(&read_table_cb->gencb, ret); |
49 | 298800ca | Stefan Hajnoczi | } |
50 | 298800ca | Stefan Hajnoczi | |
51 | 298800ca | Stefan Hajnoczi | static void qed_read_table(BDRVQEDState *s, uint64_t offset, QEDTable *table, |
52 | 298800ca | Stefan Hajnoczi | BlockDriverCompletionFunc *cb, void *opaque)
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53 | 298800ca | Stefan Hajnoczi | { |
54 | 298800ca | Stefan Hajnoczi | QEDReadTableCB *read_table_cb = gencb_alloc(sizeof(*read_table_cb),
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55 | 298800ca | Stefan Hajnoczi | cb, opaque); |
56 | 298800ca | Stefan Hajnoczi | QEMUIOVector *qiov = &read_table_cb->qiov; |
57 | 298800ca | Stefan Hajnoczi | BlockDriverAIOCB *aiocb; |
58 | 298800ca | Stefan Hajnoczi | |
59 | 298800ca | Stefan Hajnoczi | trace_qed_read_table(s, offset, table); |
60 | 298800ca | Stefan Hajnoczi | |
61 | 298800ca | Stefan Hajnoczi | read_table_cb->s = s; |
62 | 298800ca | Stefan Hajnoczi | read_table_cb->table = table; |
63 | 298800ca | Stefan Hajnoczi | read_table_cb->iov.iov_base = table->offsets, |
64 | 298800ca | Stefan Hajnoczi | read_table_cb->iov.iov_len = s->header.cluster_size * s->header.table_size, |
65 | 298800ca | Stefan Hajnoczi | |
66 | 298800ca | Stefan Hajnoczi | qemu_iovec_init_external(qiov, &read_table_cb->iov, 1);
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67 | 298800ca | Stefan Hajnoczi | aiocb = bdrv_aio_readv(s->bs->file, offset / BDRV_SECTOR_SIZE, qiov, |
68 | 298800ca | Stefan Hajnoczi | read_table_cb->iov.iov_len / BDRV_SECTOR_SIZE, |
69 | 298800ca | Stefan Hajnoczi | qed_read_table_cb, read_table_cb); |
70 | 298800ca | Stefan Hajnoczi | if (!aiocb) {
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71 | 298800ca | Stefan Hajnoczi | qed_read_table_cb(read_table_cb, -EIO); |
72 | 298800ca | Stefan Hajnoczi | } |
73 | 298800ca | Stefan Hajnoczi | } |
74 | 298800ca | Stefan Hajnoczi | |
75 | 298800ca | Stefan Hajnoczi | typedef struct { |
76 | 298800ca | Stefan Hajnoczi | GenericCB gencb; |
77 | 298800ca | Stefan Hajnoczi | BDRVQEDState *s; |
78 | 298800ca | Stefan Hajnoczi | QEDTable *orig_table; |
79 | 298800ca | Stefan Hajnoczi | QEDTable *table; |
80 | 298800ca | Stefan Hajnoczi | bool flush; /* flush after write? */ |
81 | 298800ca | Stefan Hajnoczi | |
82 | 298800ca | Stefan Hajnoczi | struct iovec iov;
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83 | 298800ca | Stefan Hajnoczi | QEMUIOVector qiov; |
84 | 298800ca | Stefan Hajnoczi | } QEDWriteTableCB; |
85 | 298800ca | Stefan Hajnoczi | |
86 | 298800ca | Stefan Hajnoczi | static void qed_write_table_cb(void *opaque, int ret) |
87 | 298800ca | Stefan Hajnoczi | { |
88 | 298800ca | Stefan Hajnoczi | QEDWriteTableCB *write_table_cb = opaque; |
89 | 298800ca | Stefan Hajnoczi | |
90 | 298800ca | Stefan Hajnoczi | trace_qed_write_table_cb(write_table_cb->s, |
91 | 298800ca | Stefan Hajnoczi | write_table_cb->orig_table, |
92 | 298800ca | Stefan Hajnoczi | write_table_cb->flush, |
93 | 298800ca | Stefan Hajnoczi | ret); |
94 | 298800ca | Stefan Hajnoczi | |
95 | 298800ca | Stefan Hajnoczi | if (ret) {
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96 | 298800ca | Stefan Hajnoczi | goto out;
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97 | 298800ca | Stefan Hajnoczi | } |
98 | 298800ca | Stefan Hajnoczi | |
99 | 298800ca | Stefan Hajnoczi | if (write_table_cb->flush) {
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100 | 298800ca | Stefan Hajnoczi | /* We still need to flush first */
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101 | 298800ca | Stefan Hajnoczi | write_table_cb->flush = false;
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102 | 298800ca | Stefan Hajnoczi | bdrv_aio_flush(write_table_cb->s->bs, qed_write_table_cb, |
103 | 298800ca | Stefan Hajnoczi | write_table_cb); |
104 | 298800ca | Stefan Hajnoczi | return;
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105 | 298800ca | Stefan Hajnoczi | } |
106 | 298800ca | Stefan Hajnoczi | |
107 | 298800ca | Stefan Hajnoczi | out:
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108 | 298800ca | Stefan Hajnoczi | qemu_vfree(write_table_cb->table); |
109 | 298800ca | Stefan Hajnoczi | gencb_complete(&write_table_cb->gencb, ret); |
110 | 298800ca | Stefan Hajnoczi | return;
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111 | 298800ca | Stefan Hajnoczi | } |
112 | 298800ca | Stefan Hajnoczi | |
113 | 298800ca | Stefan Hajnoczi | /**
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114 | 298800ca | Stefan Hajnoczi | * Write out an updated part or all of a table
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115 | 298800ca | Stefan Hajnoczi | *
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116 | 298800ca | Stefan Hajnoczi | * @s: QED state
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117 | 298800ca | Stefan Hajnoczi | * @offset: Offset of table in image file, in bytes
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118 | 298800ca | Stefan Hajnoczi | * @table: Table
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119 | 298800ca | Stefan Hajnoczi | * @index: Index of first element
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120 | 298800ca | Stefan Hajnoczi | * @n: Number of elements
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121 | 298800ca | Stefan Hajnoczi | * @flush: Whether or not to sync to disk
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122 | 298800ca | Stefan Hajnoczi | * @cb: Completion function
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123 | 298800ca | Stefan Hajnoczi | * @opaque: Argument for completion function
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124 | 298800ca | Stefan Hajnoczi | */
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125 | 298800ca | Stefan Hajnoczi | static void qed_write_table(BDRVQEDState *s, uint64_t offset, QEDTable *table, |
126 | 298800ca | Stefan Hajnoczi | unsigned int index, unsigned int n, bool flush, |
127 | 298800ca | Stefan Hajnoczi | BlockDriverCompletionFunc *cb, void *opaque)
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128 | 298800ca | Stefan Hajnoczi | { |
129 | 298800ca | Stefan Hajnoczi | QEDWriteTableCB *write_table_cb; |
130 | 298800ca | Stefan Hajnoczi | BlockDriverAIOCB *aiocb; |
131 | 298800ca | Stefan Hajnoczi | unsigned int sector_mask = BDRV_SECTOR_SIZE / sizeof(uint64_t) - 1; |
132 | 298800ca | Stefan Hajnoczi | unsigned int start, end, i; |
133 | 298800ca | Stefan Hajnoczi | size_t len_bytes; |
134 | 298800ca | Stefan Hajnoczi | |
135 | 298800ca | Stefan Hajnoczi | trace_qed_write_table(s, offset, table, index, n); |
136 | 298800ca | Stefan Hajnoczi | |
137 | 298800ca | Stefan Hajnoczi | /* Calculate indices of the first and one after last elements */
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138 | 298800ca | Stefan Hajnoczi | start = index & ~sector_mask; |
139 | 298800ca | Stefan Hajnoczi | end = (index + n + sector_mask) & ~sector_mask; |
140 | 298800ca | Stefan Hajnoczi | |
141 | 298800ca | Stefan Hajnoczi | len_bytes = (end - start) * sizeof(uint64_t);
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142 | 298800ca | Stefan Hajnoczi | |
143 | 298800ca | Stefan Hajnoczi | write_table_cb = gencb_alloc(sizeof(*write_table_cb), cb, opaque);
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144 | 298800ca | Stefan Hajnoczi | write_table_cb->s = s; |
145 | 298800ca | Stefan Hajnoczi | write_table_cb->orig_table = table; |
146 | 298800ca | Stefan Hajnoczi | write_table_cb->flush = flush; |
147 | 298800ca | Stefan Hajnoczi | write_table_cb->table = qemu_blockalign(s->bs, len_bytes); |
148 | 298800ca | Stefan Hajnoczi | write_table_cb->iov.iov_base = write_table_cb->table->offsets; |
149 | 298800ca | Stefan Hajnoczi | write_table_cb->iov.iov_len = len_bytes; |
150 | 298800ca | Stefan Hajnoczi | qemu_iovec_init_external(&write_table_cb->qiov, &write_table_cb->iov, 1);
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151 | 298800ca | Stefan Hajnoczi | |
152 | 298800ca | Stefan Hajnoczi | /* Byteswap table */
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153 | 298800ca | Stefan Hajnoczi | for (i = start; i < end; i++) {
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154 | 298800ca | Stefan Hajnoczi | uint64_t le_offset = cpu_to_le64(table->offsets[i]); |
155 | 298800ca | Stefan Hajnoczi | write_table_cb->table->offsets[i - start] = le_offset; |
156 | 298800ca | Stefan Hajnoczi | } |
157 | 298800ca | Stefan Hajnoczi | |
158 | 298800ca | Stefan Hajnoczi | /* Adjust for offset into table */
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159 | 298800ca | Stefan Hajnoczi | offset += start * sizeof(uint64_t);
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160 | 298800ca | Stefan Hajnoczi | |
161 | 298800ca | Stefan Hajnoczi | aiocb = bdrv_aio_writev(s->bs->file, offset / BDRV_SECTOR_SIZE, |
162 | 298800ca | Stefan Hajnoczi | &write_table_cb->qiov, |
163 | 298800ca | Stefan Hajnoczi | write_table_cb->iov.iov_len / BDRV_SECTOR_SIZE, |
164 | 298800ca | Stefan Hajnoczi | qed_write_table_cb, write_table_cb); |
165 | 298800ca | Stefan Hajnoczi | if (!aiocb) {
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166 | 298800ca | Stefan Hajnoczi | qed_write_table_cb(write_table_cb, -EIO); |
167 | 298800ca | Stefan Hajnoczi | } |
168 | 298800ca | Stefan Hajnoczi | } |
169 | 298800ca | Stefan Hajnoczi | |
170 | 298800ca | Stefan Hajnoczi | /**
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171 | 298800ca | Stefan Hajnoczi | * Propagate return value from async callback
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172 | 298800ca | Stefan Hajnoczi | */
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173 | 298800ca | Stefan Hajnoczi | static void qed_sync_cb(void *opaque, int ret) |
174 | 298800ca | Stefan Hajnoczi | { |
175 | 298800ca | Stefan Hajnoczi | *(int *)opaque = ret;
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176 | 298800ca | Stefan Hajnoczi | } |
177 | 298800ca | Stefan Hajnoczi | |
178 | 298800ca | Stefan Hajnoczi | int qed_read_l1_table_sync(BDRVQEDState *s)
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179 | 298800ca | Stefan Hajnoczi | { |
180 | 298800ca | Stefan Hajnoczi | int ret = -EINPROGRESS;
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181 | 298800ca | Stefan Hajnoczi | |
182 | 298800ca | Stefan Hajnoczi | async_context_push(); |
183 | 298800ca | Stefan Hajnoczi | |
184 | 298800ca | Stefan Hajnoczi | qed_read_table(s, s->header.l1_table_offset, |
185 | 298800ca | Stefan Hajnoczi | s->l1_table, qed_sync_cb, &ret); |
186 | 298800ca | Stefan Hajnoczi | while (ret == -EINPROGRESS) {
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187 | 298800ca | Stefan Hajnoczi | qemu_aio_wait(); |
188 | 298800ca | Stefan Hajnoczi | } |
189 | 298800ca | Stefan Hajnoczi | |
190 | 298800ca | Stefan Hajnoczi | async_context_pop(); |
191 | 298800ca | Stefan Hajnoczi | |
192 | 298800ca | Stefan Hajnoczi | return ret;
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193 | 298800ca | Stefan Hajnoczi | } |
194 | 298800ca | Stefan Hajnoczi | |
195 | 298800ca | Stefan Hajnoczi | void qed_write_l1_table(BDRVQEDState *s, unsigned int index, unsigned int n, |
196 | 298800ca | Stefan Hajnoczi | BlockDriverCompletionFunc *cb, void *opaque)
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197 | 298800ca | Stefan Hajnoczi | { |
198 | 298800ca | Stefan Hajnoczi | BLKDBG_EVENT(s->bs->file, BLKDBG_L1_UPDATE); |
199 | 298800ca | Stefan Hajnoczi | qed_write_table(s, s->header.l1_table_offset, |
200 | 298800ca | Stefan Hajnoczi | s->l1_table, index, n, false, cb, opaque);
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201 | 298800ca | Stefan Hajnoczi | } |
202 | 298800ca | Stefan Hajnoczi | |
203 | 298800ca | Stefan Hajnoczi | int qed_write_l1_table_sync(BDRVQEDState *s, unsigned int index, |
204 | 298800ca | Stefan Hajnoczi | unsigned int n) |
205 | 298800ca | Stefan Hajnoczi | { |
206 | 298800ca | Stefan Hajnoczi | int ret = -EINPROGRESS;
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207 | 298800ca | Stefan Hajnoczi | |
208 | 298800ca | Stefan Hajnoczi | async_context_push(); |
209 | 298800ca | Stefan Hajnoczi | |
210 | 298800ca | Stefan Hajnoczi | qed_write_l1_table(s, index, n, qed_sync_cb, &ret); |
211 | 298800ca | Stefan Hajnoczi | while (ret == -EINPROGRESS) {
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212 | 298800ca | Stefan Hajnoczi | qemu_aio_wait(); |
213 | 298800ca | Stefan Hajnoczi | } |
214 | 298800ca | Stefan Hajnoczi | |
215 | 298800ca | Stefan Hajnoczi | async_context_pop(); |
216 | 298800ca | Stefan Hajnoczi | |
217 | 298800ca | Stefan Hajnoczi | return ret;
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218 | 298800ca | Stefan Hajnoczi | } |
219 | 298800ca | Stefan Hajnoczi | |
220 | 298800ca | Stefan Hajnoczi | typedef struct { |
221 | 298800ca | Stefan Hajnoczi | GenericCB gencb; |
222 | 298800ca | Stefan Hajnoczi | BDRVQEDState *s; |
223 | 298800ca | Stefan Hajnoczi | uint64_t l2_offset; |
224 | 298800ca | Stefan Hajnoczi | QEDRequest *request; |
225 | 298800ca | Stefan Hajnoczi | } QEDReadL2TableCB; |
226 | 298800ca | Stefan Hajnoczi | |
227 | 298800ca | Stefan Hajnoczi | static void qed_read_l2_table_cb(void *opaque, int ret) |
228 | 298800ca | Stefan Hajnoczi | { |
229 | 298800ca | Stefan Hajnoczi | QEDReadL2TableCB *read_l2_table_cb = opaque; |
230 | 298800ca | Stefan Hajnoczi | QEDRequest *request = read_l2_table_cb->request; |
231 | 298800ca | Stefan Hajnoczi | BDRVQEDState *s = read_l2_table_cb->s; |
232 | 298800ca | Stefan Hajnoczi | CachedL2Table *l2_table = request->l2_table; |
233 | 298800ca | Stefan Hajnoczi | |
234 | 298800ca | Stefan Hajnoczi | if (ret) {
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235 | 298800ca | Stefan Hajnoczi | /* can't trust loaded L2 table anymore */
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236 | 298800ca | Stefan Hajnoczi | qed_unref_l2_cache_entry(l2_table); |
237 | 298800ca | Stefan Hajnoczi | request->l2_table = NULL;
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238 | 298800ca | Stefan Hajnoczi | } else {
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239 | 298800ca | Stefan Hajnoczi | l2_table->offset = read_l2_table_cb->l2_offset; |
240 | 298800ca | Stefan Hajnoczi | |
241 | 298800ca | Stefan Hajnoczi | qed_commit_l2_cache_entry(&s->l2_cache, l2_table); |
242 | 298800ca | Stefan Hajnoczi | |
243 | 298800ca | Stefan Hajnoczi | /* This is guaranteed to succeed because we just committed the entry
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244 | 298800ca | Stefan Hajnoczi | * to the cache.
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245 | 298800ca | Stefan Hajnoczi | */
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246 | 298800ca | Stefan Hajnoczi | request->l2_table = qed_find_l2_cache_entry(&s->l2_cache, |
247 | 298800ca | Stefan Hajnoczi | l2_table->offset); |
248 | 298800ca | Stefan Hajnoczi | assert(request->l2_table != NULL);
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249 | 298800ca | Stefan Hajnoczi | } |
250 | 298800ca | Stefan Hajnoczi | |
251 | 298800ca | Stefan Hajnoczi | gencb_complete(&read_l2_table_cb->gencb, ret); |
252 | 298800ca | Stefan Hajnoczi | } |
253 | 298800ca | Stefan Hajnoczi | |
254 | 298800ca | Stefan Hajnoczi | void qed_read_l2_table(BDRVQEDState *s, QEDRequest *request, uint64_t offset,
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255 | 298800ca | Stefan Hajnoczi | BlockDriverCompletionFunc *cb, void *opaque)
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256 | 298800ca | Stefan Hajnoczi | { |
257 | 298800ca | Stefan Hajnoczi | QEDReadL2TableCB *read_l2_table_cb; |
258 | 298800ca | Stefan Hajnoczi | |
259 | 298800ca | Stefan Hajnoczi | qed_unref_l2_cache_entry(request->l2_table); |
260 | 298800ca | Stefan Hajnoczi | |
261 | 298800ca | Stefan Hajnoczi | /* Check for cached L2 entry */
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262 | 298800ca | Stefan Hajnoczi | request->l2_table = qed_find_l2_cache_entry(&s->l2_cache, offset); |
263 | 298800ca | Stefan Hajnoczi | if (request->l2_table) {
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264 | 298800ca | Stefan Hajnoczi | cb(opaque, 0);
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265 | 298800ca | Stefan Hajnoczi | return;
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266 | 298800ca | Stefan Hajnoczi | } |
267 | 298800ca | Stefan Hajnoczi | |
268 | 298800ca | Stefan Hajnoczi | request->l2_table = qed_alloc_l2_cache_entry(&s->l2_cache); |
269 | 298800ca | Stefan Hajnoczi | request->l2_table->table = qed_alloc_table(s); |
270 | 298800ca | Stefan Hajnoczi | |
271 | 298800ca | Stefan Hajnoczi | read_l2_table_cb = gencb_alloc(sizeof(*read_l2_table_cb), cb, opaque);
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272 | 298800ca | Stefan Hajnoczi | read_l2_table_cb->s = s; |
273 | 298800ca | Stefan Hajnoczi | read_l2_table_cb->l2_offset = offset; |
274 | 298800ca | Stefan Hajnoczi | read_l2_table_cb->request = request; |
275 | 298800ca | Stefan Hajnoczi | |
276 | 298800ca | Stefan Hajnoczi | BLKDBG_EVENT(s->bs->file, BLKDBG_L2_LOAD); |
277 | 298800ca | Stefan Hajnoczi | qed_read_table(s, offset, request->l2_table->table, |
278 | 298800ca | Stefan Hajnoczi | qed_read_l2_table_cb, read_l2_table_cb); |
279 | 298800ca | Stefan Hajnoczi | } |
280 | 298800ca | Stefan Hajnoczi | |
281 | 298800ca | Stefan Hajnoczi | int qed_read_l2_table_sync(BDRVQEDState *s, QEDRequest *request, uint64_t offset)
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282 | 298800ca | Stefan Hajnoczi | { |
283 | 298800ca | Stefan Hajnoczi | int ret = -EINPROGRESS;
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284 | 298800ca | Stefan Hajnoczi | |
285 | 298800ca | Stefan Hajnoczi | async_context_push(); |
286 | 298800ca | Stefan Hajnoczi | |
287 | 298800ca | Stefan Hajnoczi | qed_read_l2_table(s, request, offset, qed_sync_cb, &ret); |
288 | 298800ca | Stefan Hajnoczi | while (ret == -EINPROGRESS) {
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289 | 298800ca | Stefan Hajnoczi | qemu_aio_wait(); |
290 | 298800ca | Stefan Hajnoczi | } |
291 | 298800ca | Stefan Hajnoczi | |
292 | 298800ca | Stefan Hajnoczi | async_context_pop(); |
293 | 298800ca | Stefan Hajnoczi | return ret;
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294 | 298800ca | Stefan Hajnoczi | } |
295 | 298800ca | Stefan Hajnoczi | |
296 | 298800ca | Stefan Hajnoczi | void qed_write_l2_table(BDRVQEDState *s, QEDRequest *request,
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297 | 298800ca | Stefan Hajnoczi | unsigned int index, unsigned int n, bool flush, |
298 | 298800ca | Stefan Hajnoczi | BlockDriverCompletionFunc *cb, void *opaque)
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299 | 298800ca | Stefan Hajnoczi | { |
300 | 298800ca | Stefan Hajnoczi | BLKDBG_EVENT(s->bs->file, BLKDBG_L2_UPDATE); |
301 | 298800ca | Stefan Hajnoczi | qed_write_table(s, request->l2_table->offset, |
302 | 298800ca | Stefan Hajnoczi | request->l2_table->table, index, n, flush, cb, opaque); |
303 | 298800ca | Stefan Hajnoczi | } |
304 | 298800ca | Stefan Hajnoczi | |
305 | 298800ca | Stefan Hajnoczi | int qed_write_l2_table_sync(BDRVQEDState *s, QEDRequest *request,
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306 | 298800ca | Stefan Hajnoczi | unsigned int index, unsigned int n, bool flush) |
307 | 298800ca | Stefan Hajnoczi | { |
308 | 298800ca | Stefan Hajnoczi | int ret = -EINPROGRESS;
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309 | 298800ca | Stefan Hajnoczi | |
310 | 298800ca | Stefan Hajnoczi | async_context_push(); |
311 | 298800ca | Stefan Hajnoczi | |
312 | 298800ca | Stefan Hajnoczi | qed_write_l2_table(s, request, index, n, flush, qed_sync_cb, &ret); |
313 | 298800ca | Stefan Hajnoczi | while (ret == -EINPROGRESS) {
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314 | 298800ca | Stefan Hajnoczi | qemu_aio_wait(); |
315 | 298800ca | Stefan Hajnoczi | } |
316 | 298800ca | Stefan Hajnoczi | |
317 | 298800ca | Stefan Hajnoczi | async_context_pop(); |
318 | 298800ca | Stefan Hajnoczi | return ret;
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319 | 298800ca | Stefan Hajnoczi | } |