root / block / qcow2-snapshot.c @ 2a2af967
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1 | c142442b | Kevin Wolf | /*
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2 | c142442b | Kevin Wolf | * Block driver for the QCOW version 2 format
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3 | c142442b | Kevin Wolf | *
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4 | c142442b | Kevin Wolf | * Copyright (c) 2004-2006 Fabrice Bellard
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5 | c142442b | Kevin Wolf | *
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6 | c142442b | Kevin Wolf | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | c142442b | Kevin Wolf | * of this software and associated documentation files (the "Software"), to deal
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8 | c142442b | Kevin Wolf | * in the Software without restriction, including without limitation the rights
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9 | c142442b | Kevin Wolf | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | c142442b | Kevin Wolf | * copies of the Software, and to permit persons to whom the Software is
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11 | c142442b | Kevin Wolf | * furnished to do so, subject to the following conditions:
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12 | c142442b | Kevin Wolf | *
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13 | c142442b | Kevin Wolf | * The above copyright notice and this permission notice shall be included in
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14 | c142442b | Kevin Wolf | * all copies or substantial portions of the Software.
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15 | c142442b | Kevin Wolf | *
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16 | c142442b | Kevin Wolf | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | c142442b | Kevin Wolf | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | c142442b | Kevin Wolf | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | c142442b | Kevin Wolf | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | c142442b | Kevin Wolf | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | c142442b | Kevin Wolf | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | c142442b | Kevin Wolf | * THE SOFTWARE.
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23 | c142442b | Kevin Wolf | */
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24 | c142442b | Kevin Wolf | |
25 | c142442b | Kevin Wolf | #include "qemu-common.h" |
26 | c142442b | Kevin Wolf | #include "block_int.h" |
27 | c142442b | Kevin Wolf | #include "block/qcow2.h" |
28 | c142442b | Kevin Wolf | |
29 | 541dc0d4 | Stefan Weil | typedef struct QEMU_PACKED QCowSnapshotHeader { |
30 | c142442b | Kevin Wolf | /* header is 8 byte aligned */
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31 | c142442b | Kevin Wolf | uint64_t l1_table_offset; |
32 | c142442b | Kevin Wolf | |
33 | c142442b | Kevin Wolf | uint32_t l1_size; |
34 | c142442b | Kevin Wolf | uint16_t id_str_size; |
35 | c142442b | Kevin Wolf | uint16_t name_size; |
36 | c142442b | Kevin Wolf | |
37 | c142442b | Kevin Wolf | uint32_t date_sec; |
38 | c142442b | Kevin Wolf | uint32_t date_nsec; |
39 | c142442b | Kevin Wolf | |
40 | c142442b | Kevin Wolf | uint64_t vm_clock_nsec; |
41 | c142442b | Kevin Wolf | |
42 | c142442b | Kevin Wolf | uint32_t vm_state_size; |
43 | c142442b | Kevin Wolf | uint32_t extra_data_size; /* for extension */
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44 | c142442b | Kevin Wolf | /* extra data follows */
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45 | c142442b | Kevin Wolf | /* id_str follows */
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46 | c142442b | Kevin Wolf | /* name follows */
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47 | c142442b | Kevin Wolf | } QCowSnapshotHeader; |
48 | c142442b | Kevin Wolf | |
49 | c2c9a466 | Kevin Wolf | typedef struct QEMU_PACKED QCowSnapshotExtraData { |
50 | c2c9a466 | Kevin Wolf | uint64_t vm_state_size_large; |
51 | c2c9a466 | Kevin Wolf | } QCowSnapshotExtraData; |
52 | c2c9a466 | Kevin Wolf | |
53 | ed6ccf0f | Kevin Wolf | void qcow2_free_snapshots(BlockDriverState *bs)
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54 | c142442b | Kevin Wolf | { |
55 | c142442b | Kevin Wolf | BDRVQcowState *s = bs->opaque; |
56 | c142442b | Kevin Wolf | int i;
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57 | c142442b | Kevin Wolf | |
58 | c142442b | Kevin Wolf | for(i = 0; i < s->nb_snapshots; i++) { |
59 | 7267c094 | Anthony Liguori | g_free(s->snapshots[i].name); |
60 | 7267c094 | Anthony Liguori | g_free(s->snapshots[i].id_str); |
61 | c142442b | Kevin Wolf | } |
62 | 7267c094 | Anthony Liguori | g_free(s->snapshots); |
63 | c142442b | Kevin Wolf | s->snapshots = NULL;
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64 | c142442b | Kevin Wolf | s->nb_snapshots = 0;
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65 | c142442b | Kevin Wolf | } |
66 | c142442b | Kevin Wolf | |
67 | ed6ccf0f | Kevin Wolf | int qcow2_read_snapshots(BlockDriverState *bs)
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68 | c142442b | Kevin Wolf | { |
69 | c142442b | Kevin Wolf | BDRVQcowState *s = bs->opaque; |
70 | c142442b | Kevin Wolf | QCowSnapshotHeader h; |
71 | c2c9a466 | Kevin Wolf | QCowSnapshotExtraData extra; |
72 | c142442b | Kevin Wolf | QCowSnapshot *sn; |
73 | c142442b | Kevin Wolf | int i, id_str_size, name_size;
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74 | c142442b | Kevin Wolf | int64_t offset; |
75 | c142442b | Kevin Wolf | uint32_t extra_data_size; |
76 | 42deb29f | Kevin Wolf | int ret;
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77 | c142442b | Kevin Wolf | |
78 | c142442b | Kevin Wolf | if (!s->nb_snapshots) {
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79 | c142442b | Kevin Wolf | s->snapshots = NULL;
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80 | c142442b | Kevin Wolf | s->snapshots_size = 0;
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81 | c142442b | Kevin Wolf | return 0; |
82 | c142442b | Kevin Wolf | } |
83 | c142442b | Kevin Wolf | |
84 | c142442b | Kevin Wolf | offset = s->snapshots_offset; |
85 | 7267c094 | Anthony Liguori | s->snapshots = g_malloc0(s->nb_snapshots * sizeof(QCowSnapshot));
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86 | 42deb29f | Kevin Wolf | |
87 | c142442b | Kevin Wolf | for(i = 0; i < s->nb_snapshots; i++) { |
88 | 42deb29f | Kevin Wolf | /* Read statically sized part of the snapshot header */
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89 | c142442b | Kevin Wolf | offset = align_offset(offset, 8);
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90 | 42deb29f | Kevin Wolf | ret = bdrv_pread(bs->file, offset, &h, sizeof(h));
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91 | 42deb29f | Kevin Wolf | if (ret < 0) { |
92 | c142442b | Kevin Wolf | goto fail;
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93 | 42deb29f | Kevin Wolf | } |
94 | 42deb29f | Kevin Wolf | |
95 | c142442b | Kevin Wolf | offset += sizeof(h);
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96 | c142442b | Kevin Wolf | sn = s->snapshots + i; |
97 | c142442b | Kevin Wolf | sn->l1_table_offset = be64_to_cpu(h.l1_table_offset); |
98 | c142442b | Kevin Wolf | sn->l1_size = be32_to_cpu(h.l1_size); |
99 | c142442b | Kevin Wolf | sn->vm_state_size = be32_to_cpu(h.vm_state_size); |
100 | c142442b | Kevin Wolf | sn->date_sec = be32_to_cpu(h.date_sec); |
101 | c142442b | Kevin Wolf | sn->date_nsec = be32_to_cpu(h.date_nsec); |
102 | c142442b | Kevin Wolf | sn->vm_clock_nsec = be64_to_cpu(h.vm_clock_nsec); |
103 | c142442b | Kevin Wolf | extra_data_size = be32_to_cpu(h.extra_data_size); |
104 | c142442b | Kevin Wolf | |
105 | c142442b | Kevin Wolf | id_str_size = be16_to_cpu(h.id_str_size); |
106 | c142442b | Kevin Wolf | name_size = be16_to_cpu(h.name_size); |
107 | c142442b | Kevin Wolf | |
108 | c2c9a466 | Kevin Wolf | /* Read extra data */
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109 | c2c9a466 | Kevin Wolf | ret = bdrv_pread(bs->file, offset, &extra, |
110 | c2c9a466 | Kevin Wolf | MIN(sizeof(extra), extra_data_size));
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111 | c2c9a466 | Kevin Wolf | if (ret < 0) { |
112 | c2c9a466 | Kevin Wolf | goto fail;
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113 | c2c9a466 | Kevin Wolf | } |
114 | c142442b | Kevin Wolf | offset += extra_data_size; |
115 | c142442b | Kevin Wolf | |
116 | c2c9a466 | Kevin Wolf | if (extra_data_size >= 8) { |
117 | c2c9a466 | Kevin Wolf | sn->vm_state_size = be64_to_cpu(extra.vm_state_size_large); |
118 | c2c9a466 | Kevin Wolf | } |
119 | c2c9a466 | Kevin Wolf | |
120 | 42deb29f | Kevin Wolf | /* Read snapshot ID */
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121 | 7267c094 | Anthony Liguori | sn->id_str = g_malloc(id_str_size + 1);
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122 | 42deb29f | Kevin Wolf | ret = bdrv_pread(bs->file, offset, sn->id_str, id_str_size); |
123 | 42deb29f | Kevin Wolf | if (ret < 0) { |
124 | c142442b | Kevin Wolf | goto fail;
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125 | 42deb29f | Kevin Wolf | } |
126 | c142442b | Kevin Wolf | offset += id_str_size; |
127 | c142442b | Kevin Wolf | sn->id_str[id_str_size] = '\0';
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128 | c142442b | Kevin Wolf | |
129 | 42deb29f | Kevin Wolf | /* Read snapshot name */
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130 | 7267c094 | Anthony Liguori | sn->name = g_malloc(name_size + 1);
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131 | 42deb29f | Kevin Wolf | ret = bdrv_pread(bs->file, offset, sn->name, name_size); |
132 | 42deb29f | Kevin Wolf | if (ret < 0) { |
133 | c142442b | Kevin Wolf | goto fail;
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134 | 42deb29f | Kevin Wolf | } |
135 | c142442b | Kevin Wolf | offset += name_size; |
136 | c142442b | Kevin Wolf | sn->name[name_size] = '\0';
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137 | c142442b | Kevin Wolf | } |
138 | 42deb29f | Kevin Wolf | |
139 | c142442b | Kevin Wolf | s->snapshots_size = offset - s->snapshots_offset; |
140 | c142442b | Kevin Wolf | return 0; |
141 | 42deb29f | Kevin Wolf | |
142 | 42deb29f | Kevin Wolf | fail:
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143 | ed6ccf0f | Kevin Wolf | qcow2_free_snapshots(bs); |
144 | 42deb29f | Kevin Wolf | return ret;
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145 | c142442b | Kevin Wolf | } |
146 | c142442b | Kevin Wolf | |
147 | c142442b | Kevin Wolf | /* add at the end of the file a new list of snapshots */
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148 | 7c80ab3f | Jes Sorensen | static int qcow2_write_snapshots(BlockDriverState *bs) |
149 | c142442b | Kevin Wolf | { |
150 | c142442b | Kevin Wolf | BDRVQcowState *s = bs->opaque; |
151 | c142442b | Kevin Wolf | QCowSnapshot *sn; |
152 | c142442b | Kevin Wolf | QCowSnapshotHeader h; |
153 | c2c9a466 | Kevin Wolf | QCowSnapshotExtraData extra; |
154 | c142442b | Kevin Wolf | int i, name_size, id_str_size, snapshots_size;
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155 | d69969c4 | Kevin Wolf | struct {
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156 | d69969c4 | Kevin Wolf | uint32_t nb_snapshots; |
157 | d69969c4 | Kevin Wolf | uint64_t snapshots_offset; |
158 | d69969c4 | Kevin Wolf | } QEMU_PACKED header_data; |
159 | c142442b | Kevin Wolf | int64_t offset, snapshots_offset; |
160 | 07fd8779 | Kevin Wolf | int ret;
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161 | c142442b | Kevin Wolf | |
162 | c142442b | Kevin Wolf | /* compute the size of the snapshots */
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163 | c142442b | Kevin Wolf | offset = 0;
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164 | c142442b | Kevin Wolf | for(i = 0; i < s->nb_snapshots; i++) { |
165 | c142442b | Kevin Wolf | sn = s->snapshots + i; |
166 | c142442b | Kevin Wolf | offset = align_offset(offset, 8);
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167 | c142442b | Kevin Wolf | offset += sizeof(h);
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168 | c2c9a466 | Kevin Wolf | offset += sizeof(extra);
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169 | c142442b | Kevin Wolf | offset += strlen(sn->id_str); |
170 | c142442b | Kevin Wolf | offset += strlen(sn->name); |
171 | c142442b | Kevin Wolf | } |
172 | c142442b | Kevin Wolf | snapshots_size = offset; |
173 | c142442b | Kevin Wolf | |
174 | 07fd8779 | Kevin Wolf | /* Allocate space for the new snapshot list */
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175 | ed6ccf0f | Kevin Wolf | snapshots_offset = qcow2_alloc_clusters(bs, snapshots_size); |
176 | 29216ed1 | Kevin Wolf | bdrv_flush(bs->file); |
177 | c142442b | Kevin Wolf | offset = snapshots_offset; |
178 | 5d757b56 | Kevin Wolf | if (offset < 0) { |
179 | 5d757b56 | Kevin Wolf | return offset;
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180 | 5d757b56 | Kevin Wolf | } |
181 | c142442b | Kevin Wolf | |
182 | 07fd8779 | Kevin Wolf | /* Write all snapshots to the new list */
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183 | c142442b | Kevin Wolf | for(i = 0; i < s->nb_snapshots; i++) { |
184 | c142442b | Kevin Wolf | sn = s->snapshots + i; |
185 | c142442b | Kevin Wolf | memset(&h, 0, sizeof(h)); |
186 | c142442b | Kevin Wolf | h.l1_table_offset = cpu_to_be64(sn->l1_table_offset); |
187 | c142442b | Kevin Wolf | h.l1_size = cpu_to_be32(sn->l1_size); |
188 | c2c9a466 | Kevin Wolf | /* If it doesn't fit in 32 bit, older implementations should treat it
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189 | c2c9a466 | Kevin Wolf | * as a disk-only snapshot rather than truncate the VM state */
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190 | c2c9a466 | Kevin Wolf | if (sn->vm_state_size <= 0xffffffff) { |
191 | c2c9a466 | Kevin Wolf | h.vm_state_size = cpu_to_be32(sn->vm_state_size); |
192 | c2c9a466 | Kevin Wolf | } |
193 | c142442b | Kevin Wolf | h.date_sec = cpu_to_be32(sn->date_sec); |
194 | c142442b | Kevin Wolf | h.date_nsec = cpu_to_be32(sn->date_nsec); |
195 | c142442b | Kevin Wolf | h.vm_clock_nsec = cpu_to_be64(sn->vm_clock_nsec); |
196 | c2c9a466 | Kevin Wolf | h.extra_data_size = cpu_to_be32(sizeof(extra));
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197 | c2c9a466 | Kevin Wolf | |
198 | c2c9a466 | Kevin Wolf | memset(&extra, 0, sizeof(extra)); |
199 | c2c9a466 | Kevin Wolf | extra.vm_state_size_large = cpu_to_be64(sn->vm_state_size); |
200 | c142442b | Kevin Wolf | |
201 | c142442b | Kevin Wolf | id_str_size = strlen(sn->id_str); |
202 | c142442b | Kevin Wolf | name_size = strlen(sn->name); |
203 | c142442b | Kevin Wolf | h.id_str_size = cpu_to_be16(id_str_size); |
204 | c142442b | Kevin Wolf | h.name_size = cpu_to_be16(name_size); |
205 | c142442b | Kevin Wolf | offset = align_offset(offset, 8);
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206 | 07fd8779 | Kevin Wolf | |
207 | 07fd8779 | Kevin Wolf | ret = bdrv_pwrite(bs->file, offset, &h, sizeof(h));
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208 | 07fd8779 | Kevin Wolf | if (ret < 0) { |
209 | c142442b | Kevin Wolf | goto fail;
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210 | 07fd8779 | Kevin Wolf | } |
211 | c142442b | Kevin Wolf | offset += sizeof(h);
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212 | 07fd8779 | Kevin Wolf | |
213 | c2c9a466 | Kevin Wolf | ret = bdrv_pwrite(bs->file, offset, &extra, sizeof(extra));
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214 | c2c9a466 | Kevin Wolf | if (ret < 0) { |
215 | c2c9a466 | Kevin Wolf | goto fail;
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216 | c2c9a466 | Kevin Wolf | } |
217 | c2c9a466 | Kevin Wolf | offset += sizeof(extra);
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218 | c2c9a466 | Kevin Wolf | |
219 | 07fd8779 | Kevin Wolf | ret = bdrv_pwrite(bs->file, offset, sn->id_str, id_str_size); |
220 | 07fd8779 | Kevin Wolf | if (ret < 0) { |
221 | c142442b | Kevin Wolf | goto fail;
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222 | 07fd8779 | Kevin Wolf | } |
223 | c142442b | Kevin Wolf | offset += id_str_size; |
224 | 07fd8779 | Kevin Wolf | |
225 | 07fd8779 | Kevin Wolf | ret = bdrv_pwrite(bs->file, offset, sn->name, name_size); |
226 | 07fd8779 | Kevin Wolf | if (ret < 0) { |
227 | c142442b | Kevin Wolf | goto fail;
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228 | 07fd8779 | Kevin Wolf | } |
229 | c142442b | Kevin Wolf | offset += name_size; |
230 | c142442b | Kevin Wolf | } |
231 | c142442b | Kevin Wolf | |
232 | 07fd8779 | Kevin Wolf | /*
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233 | 07fd8779 | Kevin Wolf | * Update the header to point to the new snapshot table. This requires the
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234 | 07fd8779 | Kevin Wolf | * new table and its refcounts to be stable on disk.
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235 | 07fd8779 | Kevin Wolf | */
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236 | 07fd8779 | Kevin Wolf | ret = bdrv_flush(bs); |
237 | 07fd8779 | Kevin Wolf | if (ret < 0) { |
238 | 07fd8779 | Kevin Wolf | goto fail;
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239 | 07fd8779 | Kevin Wolf | } |
240 | 07fd8779 | Kevin Wolf | |
241 | d69969c4 | Kevin Wolf | QEMU_BUILD_BUG_ON(offsetof(QCowHeader, snapshots_offset) != |
242 | d69969c4 | Kevin Wolf | offsetof(QCowHeader, nb_snapshots) + sizeof(header_data.nb_snapshots));
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243 | d69969c4 | Kevin Wolf | |
244 | d69969c4 | Kevin Wolf | header_data.nb_snapshots = cpu_to_be32(s->nb_snapshots); |
245 | d69969c4 | Kevin Wolf | header_data.snapshots_offset = cpu_to_be64(snapshots_offset); |
246 | 07fd8779 | Kevin Wolf | |
247 | 07fd8779 | Kevin Wolf | ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, nb_snapshots), |
248 | d69969c4 | Kevin Wolf | &header_data, sizeof(header_data));
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249 | 07fd8779 | Kevin Wolf | if (ret < 0) { |
250 | c142442b | Kevin Wolf | goto fail;
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251 | 07fd8779 | Kevin Wolf | } |
252 | c142442b | Kevin Wolf | |
253 | c142442b | Kevin Wolf | /* free the old snapshot table */
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254 | ed6ccf0f | Kevin Wolf | qcow2_free_clusters(bs, s->snapshots_offset, s->snapshots_size); |
255 | c142442b | Kevin Wolf | s->snapshots_offset = snapshots_offset; |
256 | c142442b | Kevin Wolf | s->snapshots_size = snapshots_size; |
257 | c142442b | Kevin Wolf | return 0; |
258 | 07fd8779 | Kevin Wolf | |
259 | 07fd8779 | Kevin Wolf | fail:
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260 | 07fd8779 | Kevin Wolf | return ret;
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261 | c142442b | Kevin Wolf | } |
262 | c142442b | Kevin Wolf | |
263 | c142442b | Kevin Wolf | static void find_new_snapshot_id(BlockDriverState *bs, |
264 | c142442b | Kevin Wolf | char *id_str, int id_str_size) |
265 | c142442b | Kevin Wolf | { |
266 | c142442b | Kevin Wolf | BDRVQcowState *s = bs->opaque; |
267 | c142442b | Kevin Wolf | QCowSnapshot *sn; |
268 | c142442b | Kevin Wolf | int i, id, id_max = 0; |
269 | c142442b | Kevin Wolf | |
270 | c142442b | Kevin Wolf | for(i = 0; i < s->nb_snapshots; i++) { |
271 | c142442b | Kevin Wolf | sn = s->snapshots + i; |
272 | c142442b | Kevin Wolf | id = strtoul(sn->id_str, NULL, 10); |
273 | c142442b | Kevin Wolf | if (id > id_max)
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274 | c142442b | Kevin Wolf | id_max = id; |
275 | c142442b | Kevin Wolf | } |
276 | c142442b | Kevin Wolf | snprintf(id_str, id_str_size, "%d", id_max + 1); |
277 | c142442b | Kevin Wolf | } |
278 | c142442b | Kevin Wolf | |
279 | c142442b | Kevin Wolf | static int find_snapshot_by_id(BlockDriverState *bs, const char *id_str) |
280 | c142442b | Kevin Wolf | { |
281 | c142442b | Kevin Wolf | BDRVQcowState *s = bs->opaque; |
282 | c142442b | Kevin Wolf | int i;
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283 | c142442b | Kevin Wolf | |
284 | c142442b | Kevin Wolf | for(i = 0; i < s->nb_snapshots; i++) { |
285 | c142442b | Kevin Wolf | if (!strcmp(s->snapshots[i].id_str, id_str))
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286 | c142442b | Kevin Wolf | return i;
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287 | c142442b | Kevin Wolf | } |
288 | c142442b | Kevin Wolf | return -1; |
289 | c142442b | Kevin Wolf | } |
290 | c142442b | Kevin Wolf | |
291 | c142442b | Kevin Wolf | static int find_snapshot_by_id_or_name(BlockDriverState *bs, const char *name) |
292 | c142442b | Kevin Wolf | { |
293 | c142442b | Kevin Wolf | BDRVQcowState *s = bs->opaque; |
294 | c142442b | Kevin Wolf | int i, ret;
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295 | c142442b | Kevin Wolf | |
296 | c142442b | Kevin Wolf | ret = find_snapshot_by_id(bs, name); |
297 | c142442b | Kevin Wolf | if (ret >= 0) |
298 | c142442b | Kevin Wolf | return ret;
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299 | c142442b | Kevin Wolf | for(i = 0; i < s->nb_snapshots; i++) { |
300 | c142442b | Kevin Wolf | if (!strcmp(s->snapshots[i].name, name))
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301 | c142442b | Kevin Wolf | return i;
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302 | c142442b | Kevin Wolf | } |
303 | c142442b | Kevin Wolf | return -1; |
304 | c142442b | Kevin Wolf | } |
305 | c142442b | Kevin Wolf | |
306 | c142442b | Kevin Wolf | /* if no id is provided, a new one is constructed */
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307 | ed6ccf0f | Kevin Wolf | int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info)
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308 | c142442b | Kevin Wolf | { |
309 | c142442b | Kevin Wolf | BDRVQcowState *s = bs->opaque; |
310 | d1ea98d5 | Kevin Wolf | QCowSnapshot *new_snapshot_list = NULL;
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311 | d1ea98d5 | Kevin Wolf | QCowSnapshot *old_snapshot_list = NULL;
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312 | d1ea98d5 | Kevin Wolf | QCowSnapshot sn1, *sn = &sn1; |
313 | c142442b | Kevin Wolf | int i, ret;
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314 | c142442b | Kevin Wolf | uint64_t *l1_table = NULL;
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315 | 5d757b56 | Kevin Wolf | int64_t l1_table_offset; |
316 | c142442b | Kevin Wolf | |
317 | c142442b | Kevin Wolf | memset(sn, 0, sizeof(*sn)); |
318 | c142442b | Kevin Wolf | |
319 | 03343166 | Kevin Wolf | /* Generate an ID if it wasn't passed */
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320 | c142442b | Kevin Wolf | if (sn_info->id_str[0] == '\0') { |
321 | c142442b | Kevin Wolf | find_new_snapshot_id(bs, sn_info->id_str, sizeof(sn_info->id_str));
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322 | c142442b | Kevin Wolf | } |
323 | c142442b | Kevin Wolf | |
324 | 03343166 | Kevin Wolf | /* Check that the ID is unique */
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325 | 03343166 | Kevin Wolf | if (find_snapshot_by_id(bs, sn_info->id_str) >= 0) { |
326 | c142442b | Kevin Wolf | return -ENOENT;
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327 | 03343166 | Kevin Wolf | } |
328 | c142442b | Kevin Wolf | |
329 | 03343166 | Kevin Wolf | /* Populate sn with passed data */
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330 | 7267c094 | Anthony Liguori | sn->id_str = g_strdup(sn_info->id_str); |
331 | 7267c094 | Anthony Liguori | sn->name = g_strdup(sn_info->name); |
332 | 03343166 | Kevin Wolf | |
333 | c142442b | Kevin Wolf | sn->vm_state_size = sn_info->vm_state_size; |
334 | c142442b | Kevin Wolf | sn->date_sec = sn_info->date_sec; |
335 | c142442b | Kevin Wolf | sn->date_nsec = sn_info->date_nsec; |
336 | c142442b | Kevin Wolf | sn->vm_clock_nsec = sn_info->vm_clock_nsec; |
337 | c142442b | Kevin Wolf | |
338 | 03343166 | Kevin Wolf | /* Allocate the L1 table of the snapshot and copy the current one there. */
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339 | 5d757b56 | Kevin Wolf | l1_table_offset = qcow2_alloc_clusters(bs, s->l1_size * sizeof(uint64_t));
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340 | 5d757b56 | Kevin Wolf | if (l1_table_offset < 0) { |
341 | d1ea98d5 | Kevin Wolf | ret = l1_table_offset; |
342 | 5d757b56 | Kevin Wolf | goto fail;
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343 | 5d757b56 | Kevin Wolf | } |
344 | 5d757b56 | Kevin Wolf | |
345 | 5d757b56 | Kevin Wolf | sn->l1_table_offset = l1_table_offset; |
346 | c142442b | Kevin Wolf | sn->l1_size = s->l1_size; |
347 | c142442b | Kevin Wolf | |
348 | 03343166 | Kevin Wolf | l1_table = g_malloc(s->l1_size * sizeof(uint64_t));
|
349 | c142442b | Kevin Wolf | for(i = 0; i < s->l1_size; i++) { |
350 | c142442b | Kevin Wolf | l1_table[i] = cpu_to_be64(s->l1_table[i]); |
351 | c142442b | Kevin Wolf | } |
352 | d1ea98d5 | Kevin Wolf | |
353 | d1ea98d5 | Kevin Wolf | ret = bdrv_pwrite(bs->file, sn->l1_table_offset, l1_table, |
354 | d1ea98d5 | Kevin Wolf | s->l1_size * sizeof(uint64_t));
|
355 | d1ea98d5 | Kevin Wolf | if (ret < 0) { |
356 | c142442b | Kevin Wolf | goto fail;
|
357 | d1ea98d5 | Kevin Wolf | } |
358 | d1ea98d5 | Kevin Wolf | |
359 | 7267c094 | Anthony Liguori | g_free(l1_table); |
360 | c142442b | Kevin Wolf | l1_table = NULL;
|
361 | c142442b | Kevin Wolf | |
362 | d1ea98d5 | Kevin Wolf | /*
|
363 | d1ea98d5 | Kevin Wolf | * Increase the refcounts of all clusters and make sure everything is
|
364 | d1ea98d5 | Kevin Wolf | * stable on disk before updating the snapshot table to contain a pointer
|
365 | d1ea98d5 | Kevin Wolf | * to the new L1 table.
|
366 | d1ea98d5 | Kevin Wolf | */
|
367 | d1ea98d5 | Kevin Wolf | ret = qcow2_update_snapshot_refcount(bs, s->l1_table_offset, s->l1_size, 1);
|
368 | d1ea98d5 | Kevin Wolf | if (ret < 0) { |
369 | d1ea98d5 | Kevin Wolf | goto fail;
|
370 | d1ea98d5 | Kevin Wolf | } |
371 | d1ea98d5 | Kevin Wolf | |
372 | d1ea98d5 | Kevin Wolf | ret = bdrv_flush(bs); |
373 | d1ea98d5 | Kevin Wolf | if (ret < 0) { |
374 | d1ea98d5 | Kevin Wolf | goto fail;
|
375 | d1ea98d5 | Kevin Wolf | } |
376 | d1ea98d5 | Kevin Wolf | |
377 | d1ea98d5 | Kevin Wolf | /* Append the new snapshot to the snapshot list */
|
378 | d1ea98d5 | Kevin Wolf | new_snapshot_list = g_malloc((s->nb_snapshots + 1) * sizeof(QCowSnapshot)); |
379 | c142442b | Kevin Wolf | if (s->snapshots) {
|
380 | d1ea98d5 | Kevin Wolf | memcpy(new_snapshot_list, s->snapshots, |
381 | d1ea98d5 | Kevin Wolf | s->nb_snapshots * sizeof(QCowSnapshot));
|
382 | d1ea98d5 | Kevin Wolf | old_snapshot_list = s->snapshots; |
383 | c142442b | Kevin Wolf | } |
384 | d1ea98d5 | Kevin Wolf | s->snapshots = new_snapshot_list; |
385 | c142442b | Kevin Wolf | s->snapshots[s->nb_snapshots++] = *sn; |
386 | c142442b | Kevin Wolf | |
387 | d1ea98d5 | Kevin Wolf | ret = qcow2_write_snapshots(bs); |
388 | d1ea98d5 | Kevin Wolf | if (ret < 0) { |
389 | d1ea98d5 | Kevin Wolf | g_free(s->snapshots); |
390 | d1ea98d5 | Kevin Wolf | s->snapshots = old_snapshot_list; |
391 | c142442b | Kevin Wolf | goto fail;
|
392 | d1ea98d5 | Kevin Wolf | } |
393 | d1ea98d5 | Kevin Wolf | |
394 | d1ea98d5 | Kevin Wolf | g_free(old_snapshot_list); |
395 | d1ea98d5 | Kevin Wolf | |
396 | c142442b | Kevin Wolf | #ifdef DEBUG_ALLOC
|
397 | 6cbc3031 | Philipp Hahn | { |
398 | 6cbc3031 | Philipp Hahn | BdrvCheckResult result = {0};
|
399 | 6cbc3031 | Philipp Hahn | qcow2_check_refcounts(bs, &result); |
400 | 6cbc3031 | Philipp Hahn | } |
401 | c142442b | Kevin Wolf | #endif
|
402 | c142442b | Kevin Wolf | return 0; |
403 | 03343166 | Kevin Wolf | |
404 | 03343166 | Kevin Wolf | fail:
|
405 | 03343166 | Kevin Wolf | g_free(sn->id_str); |
406 | 7267c094 | Anthony Liguori | g_free(sn->name); |
407 | 7267c094 | Anthony Liguori | g_free(l1_table); |
408 | d1ea98d5 | Kevin Wolf | |
409 | d1ea98d5 | Kevin Wolf | return ret;
|
410 | c142442b | Kevin Wolf | } |
411 | c142442b | Kevin Wolf | |
412 | c142442b | Kevin Wolf | /* copy the snapshot 'snapshot_name' into the current disk image */
|
413 | ed6ccf0f | Kevin Wolf | int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id) |
414 | c142442b | Kevin Wolf | { |
415 | c142442b | Kevin Wolf | BDRVQcowState *s = bs->opaque; |
416 | c142442b | Kevin Wolf | QCowSnapshot *sn; |
417 | 35d7ace7 | Kevin Wolf | int i, snapshot_index;
|
418 | 35d7ace7 | Kevin Wolf | int cur_l1_bytes, sn_l1_bytes;
|
419 | 589f284b | Kevin Wolf | int ret;
|
420 | 43a0cac4 | Kevin Wolf | uint64_t *sn_l1_table = NULL;
|
421 | c142442b | Kevin Wolf | |
422 | 589f284b | Kevin Wolf | /* Search the snapshot */
|
423 | c142442b | Kevin Wolf | snapshot_index = find_snapshot_by_id_or_name(bs, snapshot_id); |
424 | 589f284b | Kevin Wolf | if (snapshot_index < 0) { |
425 | c142442b | Kevin Wolf | return -ENOENT;
|
426 | 589f284b | Kevin Wolf | } |
427 | c142442b | Kevin Wolf | sn = &s->snapshots[snapshot_index]; |
428 | c142442b | Kevin Wolf | |
429 | 589f284b | Kevin Wolf | /*
|
430 | 589f284b | Kevin Wolf | * Make sure that the current L1 table is big enough to contain the whole
|
431 | 589f284b | Kevin Wolf | * L1 table of the snapshot. If the snapshot L1 table is smaller, the
|
432 | 589f284b | Kevin Wolf | * current one must be padded with zeros.
|
433 | 589f284b | Kevin Wolf | */
|
434 | 589f284b | Kevin Wolf | ret = qcow2_grow_l1_table(bs, sn->l1_size, true);
|
435 | 589f284b | Kevin Wolf | if (ret < 0) { |
436 | c142442b | Kevin Wolf | goto fail;
|
437 | 589f284b | Kevin Wolf | } |
438 | c142442b | Kevin Wolf | |
439 | 35d7ace7 | Kevin Wolf | cur_l1_bytes = s->l1_size * sizeof(uint64_t);
|
440 | 35d7ace7 | Kevin Wolf | sn_l1_bytes = sn->l1_size * sizeof(uint64_t);
|
441 | 35d7ace7 | Kevin Wolf | |
442 | 589f284b | Kevin Wolf | /*
|
443 | 589f284b | Kevin Wolf | * Copy the snapshot L1 table to the current L1 table.
|
444 | 589f284b | Kevin Wolf | *
|
445 | 589f284b | Kevin Wolf | * Before overwriting the old current L1 table on disk, make sure to
|
446 | 589f284b | Kevin Wolf | * increase all refcounts for the clusters referenced by the new one.
|
447 | 43a0cac4 | Kevin Wolf | * Decrease the refcount referenced by the old one only when the L1
|
448 | 43a0cac4 | Kevin Wolf | * table is overwritten.
|
449 | 589f284b | Kevin Wolf | */
|
450 | 43a0cac4 | Kevin Wolf | sn_l1_table = g_malloc0(cur_l1_bytes); |
451 | 43a0cac4 | Kevin Wolf | |
452 | 43a0cac4 | Kevin Wolf | ret = bdrv_pread(bs->file, sn->l1_table_offset, sn_l1_table, sn_l1_bytes); |
453 | 43a0cac4 | Kevin Wolf | if (ret < 0) { |
454 | 43a0cac4 | Kevin Wolf | goto fail;
|
455 | 43a0cac4 | Kevin Wolf | } |
456 | 43a0cac4 | Kevin Wolf | |
457 | 43a0cac4 | Kevin Wolf | ret = qcow2_update_snapshot_refcount(bs, sn->l1_table_offset, |
458 | 43a0cac4 | Kevin Wolf | sn->l1_size, 1);
|
459 | 589f284b | Kevin Wolf | if (ret < 0) { |
460 | c142442b | Kevin Wolf | goto fail;
|
461 | 589f284b | Kevin Wolf | } |
462 | 589f284b | Kevin Wolf | |
463 | 43a0cac4 | Kevin Wolf | ret = bdrv_pwrite_sync(bs->file, s->l1_table_offset, sn_l1_table, |
464 | 589f284b | Kevin Wolf | cur_l1_bytes); |
465 | 589f284b | Kevin Wolf | if (ret < 0) { |
466 | c142442b | Kevin Wolf | goto fail;
|
467 | 589f284b | Kevin Wolf | } |
468 | 589f284b | Kevin Wolf | |
469 | 43a0cac4 | Kevin Wolf | /*
|
470 | 43a0cac4 | Kevin Wolf | * Decrease refcount of clusters of current L1 table.
|
471 | 43a0cac4 | Kevin Wolf | *
|
472 | 43a0cac4 | Kevin Wolf | * At this point, the in-memory s->l1_table points to the old L1 table,
|
473 | 43a0cac4 | Kevin Wolf | * whereas on disk we already have the new one.
|
474 | 43a0cac4 | Kevin Wolf | *
|
475 | 43a0cac4 | Kevin Wolf | * qcow2_update_snapshot_refcount special cases the current L1 table to use
|
476 | 43a0cac4 | Kevin Wolf | * the in-memory data instead of really using the offset to load a new one,
|
477 | 43a0cac4 | Kevin Wolf | * which is why this works.
|
478 | 43a0cac4 | Kevin Wolf | */
|
479 | 43a0cac4 | Kevin Wolf | ret = qcow2_update_snapshot_refcount(bs, s->l1_table_offset, |
480 | 43a0cac4 | Kevin Wolf | s->l1_size, -1);
|
481 | 43a0cac4 | Kevin Wolf | |
482 | 43a0cac4 | Kevin Wolf | /*
|
483 | 43a0cac4 | Kevin Wolf | * Now update the in-memory L1 table to be in sync with the on-disk one. We
|
484 | 43a0cac4 | Kevin Wolf | * need to do this even if updating refcounts failed.
|
485 | 43a0cac4 | Kevin Wolf | */
|
486 | c142442b | Kevin Wolf | for(i = 0;i < s->l1_size; i++) { |
487 | 43a0cac4 | Kevin Wolf | s->l1_table[i] = be64_to_cpu(sn_l1_table[i]); |
488 | c142442b | Kevin Wolf | } |
489 | c142442b | Kevin Wolf | |
490 | 43a0cac4 | Kevin Wolf | if (ret < 0) { |
491 | 43a0cac4 | Kevin Wolf | goto fail;
|
492 | 43a0cac4 | Kevin Wolf | } |
493 | 43a0cac4 | Kevin Wolf | |
494 | 43a0cac4 | Kevin Wolf | g_free(sn_l1_table); |
495 | 43a0cac4 | Kevin Wolf | sn_l1_table = NULL;
|
496 | 43a0cac4 | Kevin Wolf | |
497 | 43a0cac4 | Kevin Wolf | /*
|
498 | 43a0cac4 | Kevin Wolf | * Update QCOW_OFLAG_COPIED in the active L1 table (it may have changed
|
499 | 43a0cac4 | Kevin Wolf | * when we decreased the refcount of the old snapshot.
|
500 | 43a0cac4 | Kevin Wolf | */
|
501 | 43a0cac4 | Kevin Wolf | ret = qcow2_update_snapshot_refcount(bs, s->l1_table_offset, s->l1_size, 0);
|
502 | 589f284b | Kevin Wolf | if (ret < 0) { |
503 | c142442b | Kevin Wolf | goto fail;
|
504 | 589f284b | Kevin Wolf | } |
505 | c142442b | Kevin Wolf | |
506 | c142442b | Kevin Wolf | #ifdef DEBUG_ALLOC
|
507 | 6cbc3031 | Philipp Hahn | { |
508 | 6cbc3031 | Philipp Hahn | BdrvCheckResult result = {0};
|
509 | 6cbc3031 | Philipp Hahn | qcow2_check_refcounts(bs, &result); |
510 | 6cbc3031 | Philipp Hahn | } |
511 | c142442b | Kevin Wolf | #endif
|
512 | c142442b | Kevin Wolf | return 0; |
513 | 589f284b | Kevin Wolf | |
514 | 589f284b | Kevin Wolf | fail:
|
515 | 43a0cac4 | Kevin Wolf | g_free(sn_l1_table); |
516 | 589f284b | Kevin Wolf | return ret;
|
517 | c142442b | Kevin Wolf | } |
518 | c142442b | Kevin Wolf | |
519 | ed6ccf0f | Kevin Wolf | int qcow2_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) |
520 | c142442b | Kevin Wolf | { |
521 | c142442b | Kevin Wolf | BDRVQcowState *s = bs->opaque; |
522 | 9a476780 | Kevin Wolf | QCowSnapshot sn; |
523 | c142442b | Kevin Wolf | int snapshot_index, ret;
|
524 | c142442b | Kevin Wolf | |
525 | 9a476780 | Kevin Wolf | /* Search the snapshot */
|
526 | c142442b | Kevin Wolf | snapshot_index = find_snapshot_by_id_or_name(bs, snapshot_id); |
527 | 9a476780 | Kevin Wolf | if (snapshot_index < 0) { |
528 | c142442b | Kevin Wolf | return -ENOENT;
|
529 | 9a476780 | Kevin Wolf | } |
530 | 9a476780 | Kevin Wolf | sn = s->snapshots[snapshot_index]; |
531 | c142442b | Kevin Wolf | |
532 | 9a476780 | Kevin Wolf | /* Remove it from the snapshot list */
|
533 | 9a476780 | Kevin Wolf | memmove(s->snapshots + snapshot_index, |
534 | 9a476780 | Kevin Wolf | s->snapshots + snapshot_index + 1,
|
535 | 9a476780 | Kevin Wolf | (s->nb_snapshots - snapshot_index - 1) * sizeof(sn)); |
536 | 9a476780 | Kevin Wolf | s->nb_snapshots--; |
537 | 9a476780 | Kevin Wolf | ret = qcow2_write_snapshots(bs); |
538 | 9a476780 | Kevin Wolf | if (ret < 0) { |
539 | c142442b | Kevin Wolf | return ret;
|
540 | 9a476780 | Kevin Wolf | } |
541 | 9a476780 | Kevin Wolf | |
542 | 9a476780 | Kevin Wolf | /*
|
543 | 9a476780 | Kevin Wolf | * The snapshot is now unused, clean up. If we fail after this point, we
|
544 | 9a476780 | Kevin Wolf | * won't recover but just leak clusters.
|
545 | 9a476780 | Kevin Wolf | */
|
546 | 9a476780 | Kevin Wolf | g_free(sn.id_str); |
547 | 9a476780 | Kevin Wolf | g_free(sn.name); |
548 | 9a476780 | Kevin Wolf | |
549 | 9a476780 | Kevin Wolf | /*
|
550 | 9a476780 | Kevin Wolf | * Now decrease the refcounts of clusters referenced by the snapshot and
|
551 | 9a476780 | Kevin Wolf | * free the L1 table.
|
552 | 9a476780 | Kevin Wolf | */
|
553 | 9a476780 | Kevin Wolf | ret = qcow2_update_snapshot_refcount(bs, sn.l1_table_offset, |
554 | 9a476780 | Kevin Wolf | sn.l1_size, -1);
|
555 | 9a476780 | Kevin Wolf | if (ret < 0) { |
556 | c142442b | Kevin Wolf | return ret;
|
557 | 9a476780 | Kevin Wolf | } |
558 | 9a476780 | Kevin Wolf | qcow2_free_clusters(bs, sn.l1_table_offset, sn.l1_size * sizeof(uint64_t));
|
559 | c142442b | Kevin Wolf | |
560 | 9a476780 | Kevin Wolf | /* must update the copied flag on the current cluster offsets */
|
561 | 9a476780 | Kevin Wolf | ret = qcow2_update_snapshot_refcount(bs, s->l1_table_offset, s->l1_size, 0);
|
562 | c142442b | Kevin Wolf | if (ret < 0) { |
563 | c142442b | Kevin Wolf | return ret;
|
564 | c142442b | Kevin Wolf | } |
565 | 9a476780 | Kevin Wolf | |
566 | c142442b | Kevin Wolf | #ifdef DEBUG_ALLOC
|
567 | 6cbc3031 | Philipp Hahn | { |
568 | 6cbc3031 | Philipp Hahn | BdrvCheckResult result = {0};
|
569 | 6cbc3031 | Philipp Hahn | qcow2_check_refcounts(bs, &result); |
570 | 6cbc3031 | Philipp Hahn | } |
571 | c142442b | Kevin Wolf | #endif
|
572 | c142442b | Kevin Wolf | return 0; |
573 | c142442b | Kevin Wolf | } |
574 | c142442b | Kevin Wolf | |
575 | ed6ccf0f | Kevin Wolf | int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
|
576 | c142442b | Kevin Wolf | { |
577 | c142442b | Kevin Wolf | BDRVQcowState *s = bs->opaque; |
578 | c142442b | Kevin Wolf | QEMUSnapshotInfo *sn_tab, *sn_info; |
579 | c142442b | Kevin Wolf | QCowSnapshot *sn; |
580 | c142442b | Kevin Wolf | int i;
|
581 | c142442b | Kevin Wolf | |
582 | c142442b | Kevin Wolf | if (!s->nb_snapshots) {
|
583 | c142442b | Kevin Wolf | *psn_tab = NULL;
|
584 | c142442b | Kevin Wolf | return s->nb_snapshots;
|
585 | c142442b | Kevin Wolf | } |
586 | c142442b | Kevin Wolf | |
587 | 7267c094 | Anthony Liguori | sn_tab = g_malloc0(s->nb_snapshots * sizeof(QEMUSnapshotInfo));
|
588 | c142442b | Kevin Wolf | for(i = 0; i < s->nb_snapshots; i++) { |
589 | c142442b | Kevin Wolf | sn_info = sn_tab + i; |
590 | c142442b | Kevin Wolf | sn = s->snapshots + i; |
591 | c142442b | Kevin Wolf | pstrcpy(sn_info->id_str, sizeof(sn_info->id_str),
|
592 | c142442b | Kevin Wolf | sn->id_str); |
593 | c142442b | Kevin Wolf | pstrcpy(sn_info->name, sizeof(sn_info->name),
|
594 | c142442b | Kevin Wolf | sn->name); |
595 | c142442b | Kevin Wolf | sn_info->vm_state_size = sn->vm_state_size; |
596 | c142442b | Kevin Wolf | sn_info->date_sec = sn->date_sec; |
597 | c142442b | Kevin Wolf | sn_info->date_nsec = sn->date_nsec; |
598 | c142442b | Kevin Wolf | sn_info->vm_clock_nsec = sn->vm_clock_nsec; |
599 | c142442b | Kevin Wolf | } |
600 | c142442b | Kevin Wolf | *psn_tab = sn_tab; |
601 | c142442b | Kevin Wolf | return s->nb_snapshots;
|
602 | c142442b | Kevin Wolf | } |
603 | c142442b | Kevin Wolf | |
604 | 51ef6727 | edison | int qcow2_snapshot_load_tmp(BlockDriverState *bs, const char *snapshot_name) |
605 | 51ef6727 | edison | { |
606 | e3f652b3 | Kevin Wolf | int i, snapshot_index;
|
607 | 51ef6727 | edison | BDRVQcowState *s = bs->opaque; |
608 | 51ef6727 | edison | QCowSnapshot *sn; |
609 | e3f652b3 | Kevin Wolf | uint64_t *new_l1_table; |
610 | e3f652b3 | Kevin Wolf | int new_l1_bytes;
|
611 | e3f652b3 | Kevin Wolf | int ret;
|
612 | 51ef6727 | edison | |
613 | e3f652b3 | Kevin Wolf | assert(bs->read_only); |
614 | e3f652b3 | Kevin Wolf | |
615 | e3f652b3 | Kevin Wolf | /* Search the snapshot */
|
616 | 51ef6727 | edison | snapshot_index = find_snapshot_by_id_or_name(bs, snapshot_name); |
617 | 51ef6727 | edison | if (snapshot_index < 0) { |
618 | 51ef6727 | edison | return -ENOENT;
|
619 | 51ef6727 | edison | } |
620 | 51ef6727 | edison | sn = &s->snapshots[snapshot_index]; |
621 | 51ef6727 | edison | |
622 | e3f652b3 | Kevin Wolf | /* Allocate and read in the snapshot's L1 table */
|
623 | e3f652b3 | Kevin Wolf | new_l1_bytes = s->l1_size * sizeof(uint64_t);
|
624 | e3f652b3 | Kevin Wolf | new_l1_table = g_malloc0(align_offset(new_l1_bytes, 512));
|
625 | 51ef6727 | edison | |
626 | e3f652b3 | Kevin Wolf | ret = bdrv_pread(bs->file, sn->l1_table_offset, new_l1_table, new_l1_bytes); |
627 | e3f652b3 | Kevin Wolf | if (ret < 0) { |
628 | e3f652b3 | Kevin Wolf | g_free(new_l1_table); |
629 | e3f652b3 | Kevin Wolf | return ret;
|
630 | 51ef6727 | edison | } |
631 | 51ef6727 | edison | |
632 | e3f652b3 | Kevin Wolf | /* Switch the L1 table */
|
633 | e3f652b3 | Kevin Wolf | g_free(s->l1_table); |
634 | e3f652b3 | Kevin Wolf | |
635 | e3f652b3 | Kevin Wolf | s->l1_size = sn->l1_size; |
636 | e3f652b3 | Kevin Wolf | s->l1_table_offset = sn->l1_table_offset; |
637 | e3f652b3 | Kevin Wolf | s->l1_table = new_l1_table; |
638 | e3f652b3 | Kevin Wolf | |
639 | 51ef6727 | edison | for(i = 0;i < s->l1_size; i++) { |
640 | 51ef6727 | edison | be64_to_cpus(&s->l1_table[i]); |
641 | 51ef6727 | edison | } |
642 | e3f652b3 | Kevin Wolf | |
643 | 51ef6727 | edison | return 0; |
644 | 51ef6727 | edison | } |