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1 | 5bb7910a | aliguori | /*
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2 | 5bb7910a | aliguori | * QEMU live migration
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3 | 5bb7910a | aliguori | *
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4 | 5bb7910a | aliguori | * Copyright IBM, Corp. 2008
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5 | 5bb7910a | aliguori | *
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6 | 5bb7910a | aliguori | * Authors:
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7 | 5bb7910a | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
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8 | 5bb7910a | aliguori | *
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9 | 5bb7910a | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | 5bb7910a | aliguori | * the COPYING file in the top-level directory.
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11 | 5bb7910a | aliguori | *
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12 | 6b620ca3 | Paolo Bonzini | * Contributions after 2012-01-13 are licensed under the terms of the
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13 | 6b620ca3 | Paolo Bonzini | * GNU GPL, version 2 or (at your option) any later version.
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14 | 5bb7910a | aliguori | */
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15 | 5bb7910a | aliguori | |
16 | 5bb7910a | aliguori | #include "qemu-common.h" |
17 | caf71f86 | Paolo Bonzini | #include "migration/migration.h" |
18 | 83c9089e | Paolo Bonzini | #include "monitor/monitor.h" |
19 | 0d82d0e8 | Juan Quintela | #include "migration/qemu-file.h" |
20 | 9c17d615 | Paolo Bonzini | #include "sysemu/sysemu.h" |
21 | 737e150e | Paolo Bonzini | #include "block/block.h" |
22 | 1de7afc9 | Paolo Bonzini | #include "qemu/sockets.h" |
23 | caf71f86 | Paolo Bonzini | #include "migration/block.h" |
24 | 766bd176 | Juan Quintela | #include "qemu/thread.h" |
25 | 791e7c82 | Luiz Capitulino | #include "qmp-commands.h" |
26 | 065e2813 | aliguori | |
27 | 065e2813 | aliguori | //#define DEBUG_MIGRATION
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28 | 065e2813 | aliguori | |
29 | 065e2813 | aliguori | #ifdef DEBUG_MIGRATION
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30 | d0f2c4c6 | malc | #define DPRINTF(fmt, ...) \
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31 | 065e2813 | aliguori | do { printf("migration: " fmt, ## __VA_ARGS__); } while (0) |
32 | 065e2813 | aliguori | #else
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33 | d0f2c4c6 | malc | #define DPRINTF(fmt, ...) \
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34 | 065e2813 | aliguori | do { } while (0) |
35 | 065e2813 | aliguori | #endif
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36 | 5bb7910a | aliguori | |
37 | 7dc688ed | Juan Quintela | enum {
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38 | 7dc688ed | Juan Quintela | MIG_STATE_ERROR, |
39 | 7dc688ed | Juan Quintela | MIG_STATE_SETUP, |
40 | 7dc688ed | Juan Quintela | MIG_STATE_CANCELLED, |
41 | 7dc688ed | Juan Quintela | MIG_STATE_ACTIVE, |
42 | 7dc688ed | Juan Quintela | MIG_STATE_COMPLETED, |
43 | 7dc688ed | Juan Quintela | }; |
44 | 5bb7910a | aliguori | |
45 | d0ae46c1 | Juan Quintela | #define MAX_THROTTLE (32 << 20) /* Migration speed throttling */ |
46 | 5bb7910a | aliguori | |
47 | 5b4e1eb7 | Juan Quintela | /* Amount of time to allocate to each "chunk" of bandwidth-throttled
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48 | 5b4e1eb7 | Juan Quintela | * data. */
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49 | 5b4e1eb7 | Juan Quintela | #define BUFFER_DELAY 100 |
50 | 5b4e1eb7 | Juan Quintela | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) |
51 | 5b4e1eb7 | Juan Quintela | |
52 | 17ad9b35 | Orit Wasserman | /* Migration XBZRLE default cache size */
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53 | 17ad9b35 | Orit Wasserman | #define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024) |
54 | 17ad9b35 | Orit Wasserman | |
55 | 99a0db9b | Gerd Hoffmann | static NotifierList migration_state_notifiers =
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56 | 99a0db9b | Gerd Hoffmann | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); |
57 | 99a0db9b | Gerd Hoffmann | |
58 | 17549e84 | Juan Quintela | /* When we add fault tolerance, we could have several
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59 | 17549e84 | Juan Quintela | migrations at once. For now we don't need to add
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60 | 17549e84 | Juan Quintela | dynamic creation of migration */
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61 | 17549e84 | Juan Quintela | |
62 | 859bc756 | Juan Quintela | MigrationState *migrate_get_current(void)
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63 | 17549e84 | Juan Quintela | { |
64 | 17549e84 | Juan Quintela | static MigrationState current_migration = {
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65 | 17549e84 | Juan Quintela | .state = MIG_STATE_SETUP, |
66 | d0ae46c1 | Juan Quintela | .bandwidth_limit = MAX_THROTTLE, |
67 | 17ad9b35 | Orit Wasserman | .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, |
68 | 17549e84 | Juan Quintela | }; |
69 | 17549e84 | Juan Quintela | |
70 | 17549e84 | Juan Quintela | return ¤t_migration;
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71 | 17549e84 | Juan Quintela | } |
72 | 17549e84 | Juan Quintela | |
73 | 43eaae28 | Paolo Bonzini | void qemu_start_incoming_migration(const char *uri, Error **errp) |
74 | 5bb7910a | aliguori | { |
75 | 34c9dd8e | aliguori | const char *p; |
76 | 34c9dd8e | aliguori | |
77 | 34c9dd8e | aliguori | if (strstart(uri, "tcp:", &p)) |
78 | 43eaae28 | Paolo Bonzini | tcp_start_incoming_migration(p, errp); |
79 | 065e2813 | aliguori | #if !defined(WIN32)
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80 | 065e2813 | aliguori | else if (strstart(uri, "exec:", &p)) |
81 | 43eaae28 | Paolo Bonzini | exec_start_incoming_migration(p, errp); |
82 | 4951f65b | Chris Lalancette | else if (strstart(uri, "unix:", &p)) |
83 | 43eaae28 | Paolo Bonzini | unix_start_incoming_migration(p, errp); |
84 | 5ac1fad3 | Paolo Bonzini | else if (strstart(uri, "fd:", &p)) |
85 | 43eaae28 | Paolo Bonzini | fd_start_incoming_migration(p, errp); |
86 | 065e2813 | aliguori | #endif
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87 | 8ca5e801 | Juan Quintela | else {
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88 | 43eaae28 | Paolo Bonzini | error_setg(errp, "unknown migration protocol: %s\n", uri);
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89 | 8ca5e801 | Juan Quintela | } |
90 | 5bb7910a | aliguori | } |
91 | 5bb7910a | aliguori | |
92 | 82a4da79 | Paolo Bonzini | static void process_incoming_migration_co(void *opaque) |
93 | 511c0231 | Juan Quintela | { |
94 | 82a4da79 | Paolo Bonzini | QEMUFile *f = opaque; |
95 | 1c12e1f5 | Paolo Bonzini | int ret;
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96 | 1c12e1f5 | Paolo Bonzini | |
97 | 1c12e1f5 | Paolo Bonzini | ret = qemu_loadvm_state(f); |
98 | 82a4da79 | Paolo Bonzini | qemu_set_fd_handler(qemu_get_fd(f), NULL, NULL, NULL); |
99 | 1c12e1f5 | Paolo Bonzini | qemu_fclose(f); |
100 | 1c12e1f5 | Paolo Bonzini | if (ret < 0) { |
101 | 511c0231 | Juan Quintela | fprintf(stderr, "load of migration failed\n");
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102 | 511c0231 | Juan Quintela | exit(0);
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103 | 511c0231 | Juan Quintela | } |
104 | 511c0231 | Juan Quintela | qemu_announce_self(); |
105 | 511c0231 | Juan Quintela | DPRINTF("successfully loaded vm state\n");
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106 | 511c0231 | Juan Quintela | |
107 | 901862cb | Benoît Canet | bdrv_clear_incoming_migration_all(); |
108 | 0f15423c | Anthony Liguori | /* Make sure all file formats flush their mutable metadata */
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109 | 0f15423c | Anthony Liguori | bdrv_invalidate_cache_all(); |
110 | 0f15423c | Anthony Liguori | |
111 | f5bbfba1 | Luiz Capitulino | if (autostart) {
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112 | 511c0231 | Juan Quintela | vm_start(); |
113 | f5bbfba1 | Luiz Capitulino | } else {
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114 | 29ed72f1 | Paolo Bonzini | runstate_set(RUN_STATE_PAUSED); |
115 | f5bbfba1 | Luiz Capitulino | } |
116 | 511c0231 | Juan Quintela | } |
117 | 511c0231 | Juan Quintela | |
118 | 82a4da79 | Paolo Bonzini | static void enter_migration_coroutine(void *opaque) |
119 | 82a4da79 | Paolo Bonzini | { |
120 | 82a4da79 | Paolo Bonzini | Coroutine *co = opaque; |
121 | 82a4da79 | Paolo Bonzini | qemu_coroutine_enter(co, NULL);
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122 | 82a4da79 | Paolo Bonzini | } |
123 | 82a4da79 | Paolo Bonzini | |
124 | 82a4da79 | Paolo Bonzini | void process_incoming_migration(QEMUFile *f)
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125 | 82a4da79 | Paolo Bonzini | { |
126 | 82a4da79 | Paolo Bonzini | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co); |
127 | 82a4da79 | Paolo Bonzini | int fd = qemu_get_fd(f);
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128 | 82a4da79 | Paolo Bonzini | |
129 | 82a4da79 | Paolo Bonzini | assert(fd != -1);
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130 | 82a4da79 | Paolo Bonzini | socket_set_nonblock(fd); |
131 | 82a4da79 | Paolo Bonzini | qemu_set_fd_handler(fd, enter_migration_coroutine, NULL, co);
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132 | 82a4da79 | Paolo Bonzini | qemu_coroutine_enter(co, f); |
133 | 82a4da79 | Paolo Bonzini | } |
134 | 82a4da79 | Paolo Bonzini | |
135 | a0a3fd60 | Glauber Costa | /* amount of nanoseconds we are willing to wait for migration to be down.
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136 | a0a3fd60 | Glauber Costa | * the choice of nanoseconds is because it is the maximum resolution that
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137 | a0a3fd60 | Glauber Costa | * get_clock() can achieve. It is an internal measure. All user-visible
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138 | a0a3fd60 | Glauber Costa | * units must be in seconds */
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139 | a0a3fd60 | Glauber Costa | static uint64_t max_downtime = 30000000; |
140 | a0a3fd60 | Glauber Costa | |
141 | a0a3fd60 | Glauber Costa | uint64_t migrate_max_downtime(void)
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142 | a0a3fd60 | Glauber Costa | { |
143 | a0a3fd60 | Glauber Costa | return max_downtime;
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144 | a0a3fd60 | Glauber Costa | } |
145 | a0a3fd60 | Glauber Costa | |
146 | bbf6da32 | Orit Wasserman | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
147 | bbf6da32 | Orit Wasserman | { |
148 | bbf6da32 | Orit Wasserman | MigrationCapabilityStatusList *head = NULL;
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149 | bbf6da32 | Orit Wasserman | MigrationCapabilityStatusList *caps; |
150 | bbf6da32 | Orit Wasserman | MigrationState *s = migrate_get_current(); |
151 | bbf6da32 | Orit Wasserman | int i;
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152 | bbf6da32 | Orit Wasserman | |
153 | bbf6da32 | Orit Wasserman | for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) { |
154 | bbf6da32 | Orit Wasserman | if (head == NULL) { |
155 | bbf6da32 | Orit Wasserman | head = g_malloc0(sizeof(*caps));
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156 | bbf6da32 | Orit Wasserman | caps = head; |
157 | bbf6da32 | Orit Wasserman | } else {
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158 | bbf6da32 | Orit Wasserman | caps->next = g_malloc0(sizeof(*caps));
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159 | bbf6da32 | Orit Wasserman | caps = caps->next; |
160 | bbf6da32 | Orit Wasserman | } |
161 | bbf6da32 | Orit Wasserman | caps->value = |
162 | bbf6da32 | Orit Wasserman | g_malloc(sizeof(*caps->value));
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163 | bbf6da32 | Orit Wasserman | caps->value->capability = i; |
164 | bbf6da32 | Orit Wasserman | caps->value->state = s->enabled_capabilities[i]; |
165 | bbf6da32 | Orit Wasserman | } |
166 | bbf6da32 | Orit Wasserman | |
167 | bbf6da32 | Orit Wasserman | return head;
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168 | bbf6da32 | Orit Wasserman | } |
169 | bbf6da32 | Orit Wasserman | |
170 | f36d55af | Orit Wasserman | static void get_xbzrle_cache_stats(MigrationInfo *info) |
171 | f36d55af | Orit Wasserman | { |
172 | f36d55af | Orit Wasserman | if (migrate_use_xbzrle()) {
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173 | f36d55af | Orit Wasserman | info->has_xbzrle_cache = true;
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174 | f36d55af | Orit Wasserman | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache));
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175 | f36d55af | Orit Wasserman | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); |
176 | f36d55af | Orit Wasserman | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); |
177 | f36d55af | Orit Wasserman | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); |
178 | f36d55af | Orit Wasserman | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); |
179 | f36d55af | Orit Wasserman | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); |
180 | f36d55af | Orit Wasserman | } |
181 | f36d55af | Orit Wasserman | } |
182 | f36d55af | Orit Wasserman | |
183 | 791e7c82 | Luiz Capitulino | MigrationInfo *qmp_query_migrate(Error **errp) |
184 | 5bb7910a | aliguori | { |
185 | 791e7c82 | Luiz Capitulino | MigrationInfo *info = g_malloc0(sizeof(*info));
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186 | 17549e84 | Juan Quintela | MigrationState *s = migrate_get_current(); |
187 | 17549e84 | Juan Quintela | |
188 | 17549e84 | Juan Quintela | switch (s->state) {
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189 | 17549e84 | Juan Quintela | case MIG_STATE_SETUP:
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190 | 17549e84 | Juan Quintela | /* no migration has happened ever */
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191 | 17549e84 | Juan Quintela | break;
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192 | 17549e84 | Juan Quintela | case MIG_STATE_ACTIVE:
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193 | 791e7c82 | Luiz Capitulino | info->has_status = true;
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194 | 791e7c82 | Luiz Capitulino | info->status = g_strdup("active");
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195 | 7aa939af | Juan Quintela | info->has_total_time = true;
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196 | 7aa939af | Juan Quintela | info->total_time = qemu_get_clock_ms(rt_clock) |
197 | 7aa939af | Juan Quintela | - s->total_time; |
198 | 2c52ddf1 | Juan Quintela | info->has_expected_downtime = true;
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199 | 2c52ddf1 | Juan Quintela | info->expected_downtime = s->expected_downtime; |
200 | 17549e84 | Juan Quintela | |
201 | 791e7c82 | Luiz Capitulino | info->has_ram = true;
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202 | 791e7c82 | Luiz Capitulino | info->ram = g_malloc0(sizeof(*info->ram));
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203 | 791e7c82 | Luiz Capitulino | info->ram->transferred = ram_bytes_transferred(); |
204 | 791e7c82 | Luiz Capitulino | info->ram->remaining = ram_bytes_remaining(); |
205 | 791e7c82 | Luiz Capitulino | info->ram->total = ram_bytes_total(); |
206 | 004d4c10 | Orit Wasserman | info->ram->duplicate = dup_mig_pages_transferred(); |
207 | 004d4c10 | Orit Wasserman | info->ram->normal = norm_mig_pages_transferred(); |
208 | 004d4c10 | Orit Wasserman | info->ram->normal_bytes = norm_mig_bytes_transferred(); |
209 | 8d017193 | Juan Quintela | info->ram->dirty_pages_rate = s->dirty_pages_rate; |
210 | 8d017193 | Juan Quintela | |
211 | 17549e84 | Juan Quintela | |
212 | 17549e84 | Juan Quintela | if (blk_mig_active()) {
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213 | 791e7c82 | Luiz Capitulino | info->has_disk = true;
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214 | 791e7c82 | Luiz Capitulino | info->disk = g_malloc0(sizeof(*info->disk));
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215 | 791e7c82 | Luiz Capitulino | info->disk->transferred = blk_mig_bytes_transferred(); |
216 | 791e7c82 | Luiz Capitulino | info->disk->remaining = blk_mig_bytes_remaining(); |
217 | 791e7c82 | Luiz Capitulino | info->disk->total = blk_mig_bytes_total(); |
218 | ff8d81d8 | aliguori | } |
219 | f36d55af | Orit Wasserman | |
220 | f36d55af | Orit Wasserman | get_xbzrle_cache_stats(info); |
221 | 17549e84 | Juan Quintela | break;
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222 | 17549e84 | Juan Quintela | case MIG_STATE_COMPLETED:
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223 | f36d55af | Orit Wasserman | get_xbzrle_cache_stats(info); |
224 | f36d55af | Orit Wasserman | |
225 | 791e7c82 | Luiz Capitulino | info->has_status = true;
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226 | 791e7c82 | Luiz Capitulino | info->status = g_strdup("completed");
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227 | 7aa939af | Juan Quintela | info->total_time = s->total_time; |
228 | 9c5a9fcf | Juan Quintela | info->has_downtime = true;
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229 | 9c5a9fcf | Juan Quintela | info->downtime = s->downtime; |
230 | d5f8a570 | Juan Quintela | |
231 | d5f8a570 | Juan Quintela | info->has_ram = true;
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232 | d5f8a570 | Juan Quintela | info->ram = g_malloc0(sizeof(*info->ram));
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233 | d5f8a570 | Juan Quintela | info->ram->transferred = ram_bytes_transferred(); |
234 | d5f8a570 | Juan Quintela | info->ram->remaining = 0;
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235 | d5f8a570 | Juan Quintela | info->ram->total = ram_bytes_total(); |
236 | 004d4c10 | Orit Wasserman | info->ram->duplicate = dup_mig_pages_transferred(); |
237 | 004d4c10 | Orit Wasserman | info->ram->normal = norm_mig_pages_transferred(); |
238 | 004d4c10 | Orit Wasserman | info->ram->normal_bytes = norm_mig_bytes_transferred(); |
239 | 17549e84 | Juan Quintela | break;
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240 | 17549e84 | Juan Quintela | case MIG_STATE_ERROR:
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241 | 791e7c82 | Luiz Capitulino | info->has_status = true;
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242 | 791e7c82 | Luiz Capitulino | info->status = g_strdup("failed");
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243 | 17549e84 | Juan Quintela | break;
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244 | 17549e84 | Juan Quintela | case MIG_STATE_CANCELLED:
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245 | 791e7c82 | Luiz Capitulino | info->has_status = true;
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246 | 791e7c82 | Luiz Capitulino | info->status = g_strdup("cancelled");
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247 | 17549e84 | Juan Quintela | break;
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248 | 5bb7910a | aliguori | } |
249 | 791e7c82 | Luiz Capitulino | |
250 | 791e7c82 | Luiz Capitulino | return info;
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251 | 5bb7910a | aliguori | } |
252 | 5bb7910a | aliguori | |
253 | 00458433 | Orit Wasserman | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
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254 | 00458433 | Orit Wasserman | Error **errp) |
255 | 00458433 | Orit Wasserman | { |
256 | 00458433 | Orit Wasserman | MigrationState *s = migrate_get_current(); |
257 | 00458433 | Orit Wasserman | MigrationCapabilityStatusList *cap; |
258 | 00458433 | Orit Wasserman | |
259 | 00458433 | Orit Wasserman | if (s->state == MIG_STATE_ACTIVE) {
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260 | 00458433 | Orit Wasserman | error_set(errp, QERR_MIGRATION_ACTIVE); |
261 | 00458433 | Orit Wasserman | return;
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262 | 00458433 | Orit Wasserman | } |
263 | 00458433 | Orit Wasserman | |
264 | 00458433 | Orit Wasserman | for (cap = params; cap; cap = cap->next) {
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265 | 00458433 | Orit Wasserman | s->enabled_capabilities[cap->value->capability] = cap->value->state; |
266 | 00458433 | Orit Wasserman | } |
267 | 00458433 | Orit Wasserman | } |
268 | 00458433 | Orit Wasserman | |
269 | 065e2813 | aliguori | /* shared migration helpers */
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270 | 065e2813 | aliguori | |
271 | 8b6b99b3 | Juan Quintela | static int migrate_fd_cleanup(MigrationState *s) |
272 | 065e2813 | aliguori | { |
273 | 41ef56e6 | Anthony Liguori | int ret = 0; |
274 | 41ef56e6 | Anthony Liguori | |
275 | 065e2813 | aliguori | if (s->file) {
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276 | d0f2c4c6 | malc | DPRINTF("closing file\n");
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277 | a6d34a94 | Eduardo Habkost | ret = qemu_fclose(s->file); |
278 | 5d39c799 | Jan Kiszka | s->file = NULL;
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279 | 065e2813 | aliguori | } |
280 | 065e2813 | aliguori | |
281 | 24ea1e4b | Paolo Bonzini | assert(s->fd == -1);
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282 | 41ef56e6 | Anthony Liguori | return ret;
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283 | 065e2813 | aliguori | } |
284 | 065e2813 | aliguori | |
285 | 8b6b99b3 | Juan Quintela | void migrate_fd_error(MigrationState *s)
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286 | 065e2813 | aliguori | { |
287 | 8b6b99b3 | Juan Quintela | DPRINTF("setting error state\n");
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288 | 8b6b99b3 | Juan Quintela | s->state = MIG_STATE_ERROR; |
289 | e0eb7390 | Juan Quintela | notifier_list_notify(&migration_state_notifiers, s); |
290 | 8b6b99b3 | Juan Quintela | migrate_fd_cleanup(s); |
291 | 8b6b99b3 | Juan Quintela | } |
292 | 8b6b99b3 | Juan Quintela | |
293 | 458cf28e | Juan Quintela | static void migrate_fd_completed(MigrationState *s) |
294 | 458cf28e | Juan Quintela | { |
295 | 458cf28e | Juan Quintela | DPRINTF("setting completed state\n");
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296 | 458cf28e | Juan Quintela | if (migrate_fd_cleanup(s) < 0) { |
297 | 458cf28e | Juan Quintela | s->state = MIG_STATE_ERROR; |
298 | 458cf28e | Juan Quintela | } else {
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299 | 458cf28e | Juan Quintela | s->state = MIG_STATE_COMPLETED; |
300 | 458cf28e | Juan Quintela | runstate_set(RUN_STATE_POSTMIGRATE); |
301 | 458cf28e | Juan Quintela | } |
302 | e0eb7390 | Juan Quintela | notifier_list_notify(&migration_state_notifiers, s); |
303 | 458cf28e | Juan Quintela | } |
304 | 458cf28e | Juan Quintela | |
305 | c87b015b | Juan Quintela | ssize_t migrate_fd_put_buffer(MigrationState *s, const void *data, |
306 | c87b015b | Juan Quintela | size_t size) |
307 | 065e2813 | aliguori | { |
308 | 065e2813 | aliguori | ssize_t ret; |
309 | 065e2813 | aliguori | |
310 | fdbecb5d | Juan Quintela | if (s->state != MIG_STATE_ACTIVE) {
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311 | fdbecb5d | Juan Quintela | return -EIO;
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312 | fdbecb5d | Juan Quintela | } |
313 | fdbecb5d | Juan Quintela | |
314 | 065e2813 | aliguori | do {
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315 | 065e2813 | aliguori | ret = s->write(s, data, size); |
316 | 95b134ea | Uri Lublin | } while (ret == -1 && ((s->get_error(s)) == EINTR)); |
317 | 065e2813 | aliguori | |
318 | 065e2813 | aliguori | if (ret == -1) |
319 | 065e2813 | aliguori | ret = -(s->get_error(s)); |
320 | 065e2813 | aliguori | |
321 | 065e2813 | aliguori | return ret;
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322 | 065e2813 | aliguori | } |
323 | 065e2813 | aliguori | |
324 | 0edda1c4 | Juan Quintela | static void migrate_fd_cancel(MigrationState *s) |
325 | 065e2813 | aliguori | { |
326 | 065e2813 | aliguori | if (s->state != MIG_STATE_ACTIVE)
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327 | 065e2813 | aliguori | return;
|
328 | 065e2813 | aliguori | |
329 | d0f2c4c6 | malc | DPRINTF("cancelling migration\n");
|
330 | 065e2813 | aliguori | |
331 | 065e2813 | aliguori | s->state = MIG_STATE_CANCELLED; |
332 | e0eb7390 | Juan Quintela | notifier_list_notify(&migration_state_notifiers, s); |
333 | 539de124 | Luiz Capitulino | qemu_savevm_state_cancel(s->file); |
334 | 065e2813 | aliguori | |
335 | 065e2813 | aliguori | migrate_fd_cleanup(s); |
336 | 065e2813 | aliguori | } |
337 | 065e2813 | aliguori | |
338 | 11c76741 | Juan Quintela | int migrate_fd_close(MigrationState *s)
|
339 | 065e2813 | aliguori | { |
340 | 8dc592e6 | Paolo Bonzini | int rc = 0; |
341 | 8dc592e6 | Paolo Bonzini | if (s->fd != -1) { |
342 | 8dc592e6 | Paolo Bonzini | rc = s->close(s); |
343 | 8dc592e6 | Paolo Bonzini | s->fd = -1;
|
344 | 8dc592e6 | Paolo Bonzini | } |
345 | 8dc592e6 | Paolo Bonzini | return rc;
|
346 | 065e2813 | aliguori | } |
347 | 99a0db9b | Gerd Hoffmann | |
348 | 99a0db9b | Gerd Hoffmann | void add_migration_state_change_notifier(Notifier *notify)
|
349 | 99a0db9b | Gerd Hoffmann | { |
350 | 99a0db9b | Gerd Hoffmann | notifier_list_add(&migration_state_notifiers, notify); |
351 | 99a0db9b | Gerd Hoffmann | } |
352 | 99a0db9b | Gerd Hoffmann | |
353 | 99a0db9b | Gerd Hoffmann | void remove_migration_state_change_notifier(Notifier *notify)
|
354 | 99a0db9b | Gerd Hoffmann | { |
355 | 31552529 | Paolo Bonzini | notifier_remove(notify); |
356 | 99a0db9b | Gerd Hoffmann | } |
357 | 99a0db9b | Gerd Hoffmann | |
358 | afe2df69 | Gerd Hoffmann | bool migration_is_active(MigrationState *s)
|
359 | afe2df69 | Gerd Hoffmann | { |
360 | afe2df69 | Gerd Hoffmann | return s->state == MIG_STATE_ACTIVE;
|
361 | afe2df69 | Gerd Hoffmann | } |
362 | afe2df69 | Gerd Hoffmann | |
363 | 7073693b | Juan Quintela | bool migration_has_finished(MigrationState *s)
|
364 | 99a0db9b | Gerd Hoffmann | { |
365 | 7073693b | Juan Quintela | return s->state == MIG_STATE_COMPLETED;
|
366 | 99a0db9b | Gerd Hoffmann | } |
367 | 0edda1c4 | Juan Quintela | |
368 | afe2df69 | Gerd Hoffmann | bool migration_has_failed(MigrationState *s)
|
369 | afe2df69 | Gerd Hoffmann | { |
370 | afe2df69 | Gerd Hoffmann | return (s->state == MIG_STATE_CANCELLED ||
|
371 | afe2df69 | Gerd Hoffmann | s->state == MIG_STATE_ERROR); |
372 | afe2df69 | Gerd Hoffmann | } |
373 | afe2df69 | Gerd Hoffmann | |
374 | 6607ae23 | Isaku Yamahata | static MigrationState *migrate_init(const MigrationParams *params) |
375 | 0edda1c4 | Juan Quintela | { |
376 | 17549e84 | Juan Quintela | MigrationState *s = migrate_get_current(); |
377 | d0ae46c1 | Juan Quintela | int64_t bandwidth_limit = s->bandwidth_limit; |
378 | bbf6da32 | Orit Wasserman | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
|
379 | 17ad9b35 | Orit Wasserman | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
380 | bbf6da32 | Orit Wasserman | |
381 | bbf6da32 | Orit Wasserman | memcpy(enabled_capabilities, s->enabled_capabilities, |
382 | bbf6da32 | Orit Wasserman | sizeof(enabled_capabilities));
|
383 | 0edda1c4 | Juan Quintela | |
384 | 17549e84 | Juan Quintela | memset(s, 0, sizeof(*s)); |
385 | d0ae46c1 | Juan Quintela | s->bandwidth_limit = bandwidth_limit; |
386 | 6607ae23 | Isaku Yamahata | s->params = *params; |
387 | bbf6da32 | Orit Wasserman | memcpy(s->enabled_capabilities, enabled_capabilities, |
388 | bbf6da32 | Orit Wasserman | sizeof(enabled_capabilities));
|
389 | 17ad9b35 | Orit Wasserman | s->xbzrle_cache_size = xbzrle_cache_size; |
390 | 1299c631 | Juan Quintela | |
391 | 0edda1c4 | Juan Quintela | s->bandwidth_limit = bandwidth_limit; |
392 | d5934dde | Juan Quintela | s->state = MIG_STATE_SETUP; |
393 | d5f8a570 | Juan Quintela | s->total_time = qemu_get_clock_ms(rt_clock); |
394 | 0edda1c4 | Juan Quintela | |
395 | 0edda1c4 | Juan Quintela | return s;
|
396 | 0edda1c4 | Juan Quintela | } |
397 | cab30143 | Juan Quintela | |
398 | fa2756b7 | Anthony Liguori | static GSList *migration_blockers;
|
399 | fa2756b7 | Anthony Liguori | |
400 | fa2756b7 | Anthony Liguori | void migrate_add_blocker(Error *reason)
|
401 | fa2756b7 | Anthony Liguori | { |
402 | fa2756b7 | Anthony Liguori | migration_blockers = g_slist_prepend(migration_blockers, reason); |
403 | fa2756b7 | Anthony Liguori | } |
404 | fa2756b7 | Anthony Liguori | |
405 | fa2756b7 | Anthony Liguori | void migrate_del_blocker(Error *reason)
|
406 | fa2756b7 | Anthony Liguori | { |
407 | fa2756b7 | Anthony Liguori | migration_blockers = g_slist_remove(migration_blockers, reason); |
408 | fa2756b7 | Anthony Liguori | } |
409 | fa2756b7 | Anthony Liguori | |
410 | e1c37d0e | Luiz Capitulino | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
411 | e1c37d0e | Luiz Capitulino | bool has_inc, bool inc, bool has_detach, bool detach, |
412 | e1c37d0e | Luiz Capitulino | Error **errp) |
413 | cab30143 | Juan Quintela | { |
414 | be7059cd | Paolo Bonzini | Error *local_err = NULL;
|
415 | 17549e84 | Juan Quintela | MigrationState *s = migrate_get_current(); |
416 | 6607ae23 | Isaku Yamahata | MigrationParams params; |
417 | cab30143 | Juan Quintela | const char *p; |
418 | cab30143 | Juan Quintela | |
419 | 6607ae23 | Isaku Yamahata | params.blk = blk; |
420 | 6607ae23 | Isaku Yamahata | params.shared = inc; |
421 | 6607ae23 | Isaku Yamahata | |
422 | 17549e84 | Juan Quintela | if (s->state == MIG_STATE_ACTIVE) {
|
423 | e1c37d0e | Luiz Capitulino | error_set(errp, QERR_MIGRATION_ACTIVE); |
424 | e1c37d0e | Luiz Capitulino | return;
|
425 | cab30143 | Juan Quintela | } |
426 | cab30143 | Juan Quintela | |
427 | e1c37d0e | Luiz Capitulino | if (qemu_savevm_state_blocked(errp)) {
|
428 | e1c37d0e | Luiz Capitulino | return;
|
429 | cab30143 | Juan Quintela | } |
430 | cab30143 | Juan Quintela | |
431 | fa2756b7 | Anthony Liguori | if (migration_blockers) {
|
432 | e1c37d0e | Luiz Capitulino | *errp = error_copy(migration_blockers->data); |
433 | e1c37d0e | Luiz Capitulino | return;
|
434 | fa2756b7 | Anthony Liguori | } |
435 | fa2756b7 | Anthony Liguori | |
436 | 6607ae23 | Isaku Yamahata | s = migrate_init(¶ms); |
437 | cab30143 | Juan Quintela | |
438 | cab30143 | Juan Quintela | if (strstart(uri, "tcp:", &p)) { |
439 | f37afb5a | Paolo Bonzini | tcp_start_outgoing_migration(s, p, &local_err); |
440 | cab30143 | Juan Quintela | #if !defined(WIN32)
|
441 | cab30143 | Juan Quintela | } else if (strstart(uri, "exec:", &p)) { |
442 | f37afb5a | Paolo Bonzini | exec_start_outgoing_migration(s, p, &local_err); |
443 | cab30143 | Juan Quintela | } else if (strstart(uri, "unix:", &p)) { |
444 | f37afb5a | Paolo Bonzini | unix_start_outgoing_migration(s, p, &local_err); |
445 | cab30143 | Juan Quintela | } else if (strstart(uri, "fd:", &p)) { |
446 | f37afb5a | Paolo Bonzini | fd_start_outgoing_migration(s, p, &local_err); |
447 | cab30143 | Juan Quintela | #endif
|
448 | 99a0db9b | Gerd Hoffmann | } else {
|
449 | e1c37d0e | Luiz Capitulino | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol"); |
450 | e1c37d0e | Luiz Capitulino | return;
|
451 | cab30143 | Juan Quintela | } |
452 | cab30143 | Juan Quintela | |
453 | f37afb5a | Paolo Bonzini | if (local_err) {
|
454 | 342ab8d1 | Paolo Bonzini | migrate_fd_error(s); |
455 | f37afb5a | Paolo Bonzini | error_propagate(errp, local_err); |
456 | e1c37d0e | Luiz Capitulino | return;
|
457 | 1299c631 | Juan Quintela | } |
458 | cab30143 | Juan Quintela | } |
459 | cab30143 | Juan Quintela | |
460 | 6cdedb07 | Luiz Capitulino | void qmp_migrate_cancel(Error **errp)
|
461 | cab30143 | Juan Quintela | { |
462 | 17549e84 | Juan Quintela | migrate_fd_cancel(migrate_get_current()); |
463 | cab30143 | Juan Quintela | } |
464 | cab30143 | Juan Quintela | |
465 | 9e1ba4cc | Orit Wasserman | void qmp_migrate_set_cache_size(int64_t value, Error **errp)
|
466 | 9e1ba4cc | Orit Wasserman | { |
467 | 9e1ba4cc | Orit Wasserman | MigrationState *s = migrate_get_current(); |
468 | 9e1ba4cc | Orit Wasserman | |
469 | 9e1ba4cc | Orit Wasserman | /* Check for truncation */
|
470 | 9e1ba4cc | Orit Wasserman | if (value != (size_t)value) {
|
471 | 9e1ba4cc | Orit Wasserman | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size",
|
472 | 9e1ba4cc | Orit Wasserman | "exceeding address space");
|
473 | 9e1ba4cc | Orit Wasserman | return;
|
474 | 9e1ba4cc | Orit Wasserman | } |
475 | 9e1ba4cc | Orit Wasserman | |
476 | 9e1ba4cc | Orit Wasserman | s->xbzrle_cache_size = xbzrle_cache_resize(value); |
477 | 9e1ba4cc | Orit Wasserman | } |
478 | 9e1ba4cc | Orit Wasserman | |
479 | 9e1ba4cc | Orit Wasserman | int64_t qmp_query_migrate_cache_size(Error **errp) |
480 | 9e1ba4cc | Orit Wasserman | { |
481 | 9e1ba4cc | Orit Wasserman | return migrate_xbzrle_cache_size();
|
482 | 9e1ba4cc | Orit Wasserman | } |
483 | 9e1ba4cc | Orit Wasserman | |
484 | 3dc85383 | Luiz Capitulino | void qmp_migrate_set_speed(int64_t value, Error **errp)
|
485 | cab30143 | Juan Quintela | { |
486 | cab30143 | Juan Quintela | MigrationState *s; |
487 | cab30143 | Juan Quintela | |
488 | 3dc85383 | Luiz Capitulino | if (value < 0) { |
489 | 3dc85383 | Luiz Capitulino | value = 0;
|
490 | 99a0db9b | Gerd Hoffmann | } |
491 | cab30143 | Juan Quintela | |
492 | 17549e84 | Juan Quintela | s = migrate_get_current(); |
493 | 3dc85383 | Luiz Capitulino | s->bandwidth_limit = value; |
494 | d0ae46c1 | Juan Quintela | qemu_file_set_rate_limit(s->file, s->bandwidth_limit); |
495 | cab30143 | Juan Quintela | } |
496 | cab30143 | Juan Quintela | |
497 | 4f0a993b | Luiz Capitulino | void qmp_migrate_set_downtime(double value, Error **errp) |
498 | cab30143 | Juan Quintela | { |
499 | 4f0a993b | Luiz Capitulino | value *= 1e9;
|
500 | 4f0a993b | Luiz Capitulino | value = MAX(0, MIN(UINT64_MAX, value));
|
501 | 4f0a993b | Luiz Capitulino | max_downtime = (uint64_t)value; |
502 | 99a0db9b | Gerd Hoffmann | } |
503 | 17ad9b35 | Orit Wasserman | |
504 | 17ad9b35 | Orit Wasserman | int migrate_use_xbzrle(void) |
505 | 17ad9b35 | Orit Wasserman | { |
506 | 17ad9b35 | Orit Wasserman | MigrationState *s; |
507 | 17ad9b35 | Orit Wasserman | |
508 | 17ad9b35 | Orit Wasserman | s = migrate_get_current(); |
509 | 17ad9b35 | Orit Wasserman | |
510 | 17ad9b35 | Orit Wasserman | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE];
|
511 | 17ad9b35 | Orit Wasserman | } |
512 | 17ad9b35 | Orit Wasserman | |
513 | 17ad9b35 | Orit Wasserman | int64_t migrate_xbzrle_cache_size(void)
|
514 | 17ad9b35 | Orit Wasserman | { |
515 | 17ad9b35 | Orit Wasserman | MigrationState *s; |
516 | 17ad9b35 | Orit Wasserman | |
517 | 17ad9b35 | Orit Wasserman | s = migrate_get_current(); |
518 | 17ad9b35 | Orit Wasserman | |
519 | 17ad9b35 | Orit Wasserman | return s->xbzrle_cache_size;
|
520 | 17ad9b35 | Orit Wasserman | } |
521 | 0d82d0e8 | Juan Quintela | |
522 | 0d82d0e8 | Juan Quintela | /* migration thread support */
|
523 | 0d82d0e8 | Juan Quintela | |
524 | 0d82d0e8 | Juan Quintela | typedef struct QEMUFileBuffered { |
525 | 0d82d0e8 | Juan Quintela | MigrationState *migration_state; |
526 | 0d82d0e8 | Juan Quintela | QEMUFile *file; |
527 | 0d82d0e8 | Juan Quintela | size_t bytes_xfer; |
528 | 0d82d0e8 | Juan Quintela | size_t xfer_limit; |
529 | 0d82d0e8 | Juan Quintela | uint8_t *buffer; |
530 | 0d82d0e8 | Juan Quintela | size_t buffer_size; |
531 | 0d82d0e8 | Juan Quintela | size_t buffer_capacity; |
532 | 0d82d0e8 | Juan Quintela | QemuThread thread; |
533 | 0d82d0e8 | Juan Quintela | } QEMUFileBuffered; |
534 | 0d82d0e8 | Juan Quintela | |
535 | 0d82d0e8 | Juan Quintela | static ssize_t buffered_flush(QEMUFileBuffered *s)
|
536 | 0d82d0e8 | Juan Quintela | { |
537 | 0d82d0e8 | Juan Quintela | size_t offset = 0;
|
538 | 0d82d0e8 | Juan Quintela | ssize_t ret = 0;
|
539 | 0d82d0e8 | Juan Quintela | |
540 | 0d82d0e8 | Juan Quintela | DPRINTF("flushing %zu byte(s) of data\n", s->buffer_size);
|
541 | 0d82d0e8 | Juan Quintela | |
542 | 0d82d0e8 | Juan Quintela | while (s->bytes_xfer < s->xfer_limit && offset < s->buffer_size) {
|
543 | 0d82d0e8 | Juan Quintela | size_t to_send = MIN(s->buffer_size - offset, s->xfer_limit - s->bytes_xfer); |
544 | 0d82d0e8 | Juan Quintela | ret = migrate_fd_put_buffer(s->migration_state, s->buffer + offset, |
545 | 0d82d0e8 | Juan Quintela | to_send); |
546 | 0d82d0e8 | Juan Quintela | if (ret <= 0) { |
547 | 0d82d0e8 | Juan Quintela | DPRINTF("error flushing data, %zd\n", ret);
|
548 | 0d82d0e8 | Juan Quintela | break;
|
549 | 0d82d0e8 | Juan Quintela | } else {
|
550 | 0d82d0e8 | Juan Quintela | DPRINTF("flushed %zd byte(s)\n", ret);
|
551 | 0d82d0e8 | Juan Quintela | offset += ret; |
552 | 0d82d0e8 | Juan Quintela | s->bytes_xfer += ret; |
553 | 0d82d0e8 | Juan Quintela | } |
554 | 0d82d0e8 | Juan Quintela | } |
555 | 0d82d0e8 | Juan Quintela | |
556 | 0d82d0e8 | Juan Quintela | DPRINTF("flushed %zu of %zu byte(s)\n", offset, s->buffer_size);
|
557 | 0d82d0e8 | Juan Quintela | memmove(s->buffer, s->buffer + offset, s->buffer_size - offset); |
558 | 0d82d0e8 | Juan Quintela | s->buffer_size -= offset; |
559 | 0d82d0e8 | Juan Quintela | |
560 | 0d82d0e8 | Juan Quintela | if (ret < 0) { |
561 | 0d82d0e8 | Juan Quintela | return ret;
|
562 | 0d82d0e8 | Juan Quintela | } |
563 | 0d82d0e8 | Juan Quintela | return offset;
|
564 | 0d82d0e8 | Juan Quintela | } |
565 | 0d82d0e8 | Juan Quintela | |
566 | 0d82d0e8 | Juan Quintela | static int buffered_put_buffer(void *opaque, const uint8_t *buf, |
567 | 0d82d0e8 | Juan Quintela | int64_t pos, int size)
|
568 | 0d82d0e8 | Juan Quintela | { |
569 | 0d82d0e8 | Juan Quintela | QEMUFileBuffered *s = opaque; |
570 | 0d82d0e8 | Juan Quintela | ssize_t error; |
571 | 0d82d0e8 | Juan Quintela | |
572 | 0d82d0e8 | Juan Quintela | DPRINTF("putting %d bytes at %" PRId64 "\n", size, pos); |
573 | 0d82d0e8 | Juan Quintela | |
574 | 0d82d0e8 | Juan Quintela | error = qemu_file_get_error(s->file); |
575 | 0d82d0e8 | Juan Quintela | if (error) {
|
576 | 0d82d0e8 | Juan Quintela | DPRINTF("flush when error, bailing: %s\n", strerror(-error));
|
577 | 0d82d0e8 | Juan Quintela | return error;
|
578 | 0d82d0e8 | Juan Quintela | } |
579 | 0d82d0e8 | Juan Quintela | |
580 | 0d82d0e8 | Juan Quintela | if (size <= 0) { |
581 | 0d82d0e8 | Juan Quintela | return size;
|
582 | 0d82d0e8 | Juan Quintela | } |
583 | 0d82d0e8 | Juan Quintela | |
584 | 0d82d0e8 | Juan Quintela | if (size > (s->buffer_capacity - s->buffer_size)) {
|
585 | 0d82d0e8 | Juan Quintela | DPRINTF("increasing buffer capacity from %zu by %zu\n",
|
586 | 0d82d0e8 | Juan Quintela | s->buffer_capacity, size + 1024);
|
587 | 0d82d0e8 | Juan Quintela | |
588 | 0d82d0e8 | Juan Quintela | s->buffer_capacity += size + 1024;
|
589 | 0d82d0e8 | Juan Quintela | |
590 | 0d82d0e8 | Juan Quintela | s->buffer = g_realloc(s->buffer, s->buffer_capacity); |
591 | 0d82d0e8 | Juan Quintela | } |
592 | 0d82d0e8 | Juan Quintela | |
593 | 0d82d0e8 | Juan Quintela | memcpy(s->buffer + s->buffer_size, buf, size); |
594 | 0d82d0e8 | Juan Quintela | s->buffer_size += size; |
595 | 0d82d0e8 | Juan Quintela | |
596 | 0d82d0e8 | Juan Quintela | return size;
|
597 | 0d82d0e8 | Juan Quintela | } |
598 | 0d82d0e8 | Juan Quintela | |
599 | 0d82d0e8 | Juan Quintela | static int buffered_close(void *opaque) |
600 | 0d82d0e8 | Juan Quintela | { |
601 | 0d82d0e8 | Juan Quintela | QEMUFileBuffered *s = opaque; |
602 | 0d82d0e8 | Juan Quintela | ssize_t ret = 0;
|
603 | 0d82d0e8 | Juan Quintela | int ret2;
|
604 | 0d82d0e8 | Juan Quintela | |
605 | 0d82d0e8 | Juan Quintela | DPRINTF("closing\n");
|
606 | 0d82d0e8 | Juan Quintela | |
607 | 0d82d0e8 | Juan Quintela | s->xfer_limit = INT_MAX; |
608 | 0d82d0e8 | Juan Quintela | while (!qemu_file_get_error(s->file) && s->buffer_size) {
|
609 | 0d82d0e8 | Juan Quintela | ret = buffered_flush(s); |
610 | 0d82d0e8 | Juan Quintela | if (ret < 0) { |
611 | 0d82d0e8 | Juan Quintela | break;
|
612 | 0d82d0e8 | Juan Quintela | } |
613 | 0d82d0e8 | Juan Quintela | } |
614 | 0d82d0e8 | Juan Quintela | |
615 | 0d82d0e8 | Juan Quintela | ret2 = migrate_fd_close(s->migration_state); |
616 | 0d82d0e8 | Juan Quintela | if (ret >= 0) { |
617 | 0d82d0e8 | Juan Quintela | ret = ret2; |
618 | 0d82d0e8 | Juan Quintela | } |
619 | 0d82d0e8 | Juan Quintela | ret = migrate_fd_close(s->migration_state); |
620 | 0d82d0e8 | Juan Quintela | s->migration_state->complete = true;
|
621 | 0d82d0e8 | Juan Quintela | return ret;
|
622 | 0d82d0e8 | Juan Quintela | } |
623 | 0d82d0e8 | Juan Quintela | |
624 | 0d82d0e8 | Juan Quintela | static int buffered_get_fd(void *opaque) |
625 | 0d82d0e8 | Juan Quintela | { |
626 | 0d82d0e8 | Juan Quintela | QEMUFileBuffered *s = opaque; |
627 | 0d82d0e8 | Juan Quintela | |
628 | e659586e | Paolo Bonzini | return s->migration_state->fd;
|
629 | 0d82d0e8 | Juan Quintela | } |
630 | 0d82d0e8 | Juan Quintela | |
631 | 0d82d0e8 | Juan Quintela | /*
|
632 | 0d82d0e8 | Juan Quintela | * The meaning of the return values is:
|
633 | 0d82d0e8 | Juan Quintela | * 0: We can continue sending
|
634 | 0d82d0e8 | Juan Quintela | * 1: Time to stop
|
635 | 0d82d0e8 | Juan Quintela | * negative: There has been an error
|
636 | 0d82d0e8 | Juan Quintela | */
|
637 | 0d82d0e8 | Juan Quintela | static int buffered_rate_limit(void *opaque) |
638 | 0d82d0e8 | Juan Quintela | { |
639 | 0d82d0e8 | Juan Quintela | QEMUFileBuffered *s = opaque; |
640 | 0d82d0e8 | Juan Quintela | int ret;
|
641 | 0d82d0e8 | Juan Quintela | |
642 | 0d82d0e8 | Juan Quintela | ret = qemu_file_get_error(s->file); |
643 | 0d82d0e8 | Juan Quintela | if (ret) {
|
644 | 0d82d0e8 | Juan Quintela | return ret;
|
645 | 0d82d0e8 | Juan Quintela | } |
646 | 0d82d0e8 | Juan Quintela | |
647 | 0d82d0e8 | Juan Quintela | if (s->bytes_xfer > s->xfer_limit) {
|
648 | 0d82d0e8 | Juan Quintela | return 1; |
649 | 0d82d0e8 | Juan Quintela | } |
650 | 0d82d0e8 | Juan Quintela | |
651 | 0d82d0e8 | Juan Quintela | return 0; |
652 | 0d82d0e8 | Juan Quintela | } |
653 | 0d82d0e8 | Juan Quintela | |
654 | 0d82d0e8 | Juan Quintela | static int64_t buffered_set_rate_limit(void *opaque, int64_t new_rate) |
655 | 0d82d0e8 | Juan Quintela | { |
656 | 0d82d0e8 | Juan Quintela | QEMUFileBuffered *s = opaque; |
657 | 0d82d0e8 | Juan Quintela | if (qemu_file_get_error(s->file)) {
|
658 | 0d82d0e8 | Juan Quintela | goto out;
|
659 | 0d82d0e8 | Juan Quintela | } |
660 | 0d82d0e8 | Juan Quintela | if (new_rate > SIZE_MAX) {
|
661 | 0d82d0e8 | Juan Quintela | new_rate = SIZE_MAX; |
662 | 0d82d0e8 | Juan Quintela | } |
663 | 0d82d0e8 | Juan Quintela | |
664 | 0d82d0e8 | Juan Quintela | s->xfer_limit = new_rate / 10;
|
665 | 0d82d0e8 | Juan Quintela | |
666 | 0d82d0e8 | Juan Quintela | out:
|
667 | 0d82d0e8 | Juan Quintela | return s->xfer_limit;
|
668 | 0d82d0e8 | Juan Quintela | } |
669 | 0d82d0e8 | Juan Quintela | |
670 | 0d82d0e8 | Juan Quintela | static int64_t buffered_get_rate_limit(void *opaque) |
671 | 0d82d0e8 | Juan Quintela | { |
672 | 0d82d0e8 | Juan Quintela | QEMUFileBuffered *s = opaque; |
673 | 0d82d0e8 | Juan Quintela | |
674 | 0d82d0e8 | Juan Quintela | return s->xfer_limit;
|
675 | 0d82d0e8 | Juan Quintela | } |
676 | 0d82d0e8 | Juan Quintela | |
677 | 0e288fa3 | Juan Quintela | static bool migrate_fd_put_ready(MigrationState *s, uint64_t max_size) |
678 | 0e288fa3 | Juan Quintela | { |
679 | 0e288fa3 | Juan Quintela | int ret;
|
680 | 0e288fa3 | Juan Quintela | uint64_t pending_size; |
681 | 0e288fa3 | Juan Quintela | bool last_round = false; |
682 | 0e288fa3 | Juan Quintela | |
683 | 0e288fa3 | Juan Quintela | qemu_mutex_lock_iothread(); |
684 | 0e288fa3 | Juan Quintela | if (s->state != MIG_STATE_ACTIVE) {
|
685 | 0e288fa3 | Juan Quintela | DPRINTF("put_ready returning because of non-active state\n");
|
686 | 0e288fa3 | Juan Quintela | qemu_mutex_unlock_iothread(); |
687 | 0e288fa3 | Juan Quintela | return false; |
688 | 0e288fa3 | Juan Quintela | } |
689 | 0e288fa3 | Juan Quintela | if (s->first_time) {
|
690 | 0e288fa3 | Juan Quintela | s->first_time = false;
|
691 | 0e288fa3 | Juan Quintela | DPRINTF("beginning savevm\n");
|
692 | 0e288fa3 | Juan Quintela | ret = qemu_savevm_state_begin(s->file, &s->params); |
693 | 0e288fa3 | Juan Quintela | if (ret < 0) { |
694 | 0e288fa3 | Juan Quintela | DPRINTF("failed, %d\n", ret);
|
695 | 0e288fa3 | Juan Quintela | migrate_fd_error(s); |
696 | 0e288fa3 | Juan Quintela | qemu_mutex_unlock_iothread(); |
697 | 0e288fa3 | Juan Quintela | return false; |
698 | 0e288fa3 | Juan Quintela | } |
699 | 0e288fa3 | Juan Quintela | } |
700 | 0e288fa3 | Juan Quintela | |
701 | 0e288fa3 | Juan Quintela | DPRINTF("iterate\n");
|
702 | 0e288fa3 | Juan Quintela | pending_size = qemu_savevm_state_pending(s->file, max_size); |
703 | 0e288fa3 | Juan Quintela | DPRINTF("pending size %lu max %lu\n", pending_size, max_size);
|
704 | 0e288fa3 | Juan Quintela | if (pending_size >= max_size) {
|
705 | 0e288fa3 | Juan Quintela | ret = qemu_savevm_state_iterate(s->file); |
706 | 0e288fa3 | Juan Quintela | if (ret < 0) { |
707 | 0e288fa3 | Juan Quintela | migrate_fd_error(s); |
708 | 0e288fa3 | Juan Quintela | } |
709 | 0e288fa3 | Juan Quintela | } else {
|
710 | 0e288fa3 | Juan Quintela | int old_vm_running = runstate_is_running();
|
711 | 0e288fa3 | Juan Quintela | int64_t start_time, end_time; |
712 | 0e288fa3 | Juan Quintela | |
713 | 0e288fa3 | Juan Quintela | DPRINTF("done iterating\n");
|
714 | 0e288fa3 | Juan Quintela | start_time = qemu_get_clock_ms(rt_clock); |
715 | 0e288fa3 | Juan Quintela | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); |
716 | 0e288fa3 | Juan Quintela | if (old_vm_running) {
|
717 | 0e288fa3 | Juan Quintela | vm_stop(RUN_STATE_FINISH_MIGRATE); |
718 | 0e288fa3 | Juan Quintela | } else {
|
719 | 0e288fa3 | Juan Quintela | vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); |
720 | 0e288fa3 | Juan Quintela | } |
721 | 0e288fa3 | Juan Quintela | |
722 | 0e288fa3 | Juan Quintela | if (qemu_savevm_state_complete(s->file) < 0) { |
723 | 0e288fa3 | Juan Quintela | migrate_fd_error(s); |
724 | 0e288fa3 | Juan Quintela | } else {
|
725 | 0e288fa3 | Juan Quintela | migrate_fd_completed(s); |
726 | 0e288fa3 | Juan Quintela | } |
727 | 0e288fa3 | Juan Quintela | end_time = qemu_get_clock_ms(rt_clock); |
728 | 0e288fa3 | Juan Quintela | s->total_time = end_time - s->total_time; |
729 | 0e288fa3 | Juan Quintela | s->downtime = end_time - start_time; |
730 | 0e288fa3 | Juan Quintela | if (s->state != MIG_STATE_COMPLETED) {
|
731 | 0e288fa3 | Juan Quintela | if (old_vm_running) {
|
732 | 0e288fa3 | Juan Quintela | vm_start(); |
733 | 0e288fa3 | Juan Quintela | } |
734 | 0e288fa3 | Juan Quintela | } |
735 | 0e288fa3 | Juan Quintela | last_round = true;
|
736 | 0e288fa3 | Juan Quintela | } |
737 | 0e288fa3 | Juan Quintela | qemu_mutex_unlock_iothread(); |
738 | 0e288fa3 | Juan Quintela | |
739 | 0e288fa3 | Juan Quintela | return last_round;
|
740 | 0e288fa3 | Juan Quintela | } |
741 | 0e288fa3 | Juan Quintela | |
742 | 0d82d0e8 | Juan Quintela | static void *buffered_file_thread(void *opaque) |
743 | 0d82d0e8 | Juan Quintela | { |
744 | 0d82d0e8 | Juan Quintela | QEMUFileBuffered *s = opaque; |
745 | 0d82d0e8 | Juan Quintela | int64_t initial_time = qemu_get_clock_ms(rt_clock); |
746 | 0d82d0e8 | Juan Quintela | int64_t max_size = 0;
|
747 | 0d82d0e8 | Juan Quintela | bool last_round = false; |
748 | 0d82d0e8 | Juan Quintela | |
749 | 0d82d0e8 | Juan Quintela | while (true) { |
750 | 0d82d0e8 | Juan Quintela | int64_t current_time = qemu_get_clock_ms(rt_clock); |
751 | 0d82d0e8 | Juan Quintela | |
752 | 0d82d0e8 | Juan Quintela | if (s->migration_state->complete) {
|
753 | 0d82d0e8 | Juan Quintela | break;
|
754 | 0d82d0e8 | Juan Quintela | } |
755 | 0d82d0e8 | Juan Quintela | if (current_time >= initial_time + BUFFER_DELAY) {
|
756 | 0d82d0e8 | Juan Quintela | uint64_t transferred_bytes = s->bytes_xfer; |
757 | 0d82d0e8 | Juan Quintela | uint64_t time_spent = current_time - initial_time; |
758 | 0d82d0e8 | Juan Quintela | double bandwidth = transferred_bytes / time_spent;
|
759 | 0d82d0e8 | Juan Quintela | max_size = bandwidth * migrate_max_downtime() / 1000000;
|
760 | 0d82d0e8 | Juan Quintela | |
761 | 0d82d0e8 | Juan Quintela | DPRINTF("transferred %" PRIu64 " time_spent %" PRIu64 |
762 | 0d82d0e8 | Juan Quintela | " bandwidth %g max_size %" PRId64 "\n", |
763 | 0d82d0e8 | Juan Quintela | transferred_bytes, time_spent, bandwidth, max_size); |
764 | 0d82d0e8 | Juan Quintela | |
765 | 0d82d0e8 | Juan Quintela | s->bytes_xfer = 0;
|
766 | 0d82d0e8 | Juan Quintela | initial_time = current_time; |
767 | 0d82d0e8 | Juan Quintela | } |
768 | 0d82d0e8 | Juan Quintela | if (!last_round && (s->bytes_xfer >= s->xfer_limit)) {
|
769 | 0d82d0e8 | Juan Quintela | /* usleep expects microseconds */
|
770 | 0d82d0e8 | Juan Quintela | g_usleep((initial_time + BUFFER_DELAY - current_time)*1000);
|
771 | 0d82d0e8 | Juan Quintela | } |
772 | 0d82d0e8 | Juan Quintela | if (buffered_flush(s) < 0) { |
773 | 0d82d0e8 | Juan Quintela | break;
|
774 | 0d82d0e8 | Juan Quintela | } |
775 | 0d82d0e8 | Juan Quintela | |
776 | 0d82d0e8 | Juan Quintela | DPRINTF("file is ready\n");
|
777 | 0d82d0e8 | Juan Quintela | if (s->bytes_xfer < s->xfer_limit) {
|
778 | 0d82d0e8 | Juan Quintela | DPRINTF("notifying client\n");
|
779 | 0d82d0e8 | Juan Quintela | last_round = migrate_fd_put_ready(s->migration_state, max_size); |
780 | 0d82d0e8 | Juan Quintela | } |
781 | 0d82d0e8 | Juan Quintela | } |
782 | 0d82d0e8 | Juan Quintela | |
783 | 0d82d0e8 | Juan Quintela | g_free(s->buffer); |
784 | 0d82d0e8 | Juan Quintela | g_free(s); |
785 | 0d82d0e8 | Juan Quintela | return NULL; |
786 | 0d82d0e8 | Juan Quintela | } |
787 | 0d82d0e8 | Juan Quintela | |
788 | 0d82d0e8 | Juan Quintela | static const QEMUFileOps buffered_file_ops = { |
789 | 0d82d0e8 | Juan Quintela | .get_fd = buffered_get_fd, |
790 | 0d82d0e8 | Juan Quintela | .put_buffer = buffered_put_buffer, |
791 | 0d82d0e8 | Juan Quintela | .close = buffered_close, |
792 | 0d82d0e8 | Juan Quintela | .rate_limit = buffered_rate_limit, |
793 | 0d82d0e8 | Juan Quintela | .get_rate_limit = buffered_get_rate_limit, |
794 | 0d82d0e8 | Juan Quintela | .set_rate_limit = buffered_set_rate_limit, |
795 | 0d82d0e8 | Juan Quintela | }; |
796 | 0d82d0e8 | Juan Quintela | |
797 | 2e450865 | Juan Quintela | void migrate_fd_connect(MigrationState *migration_state)
|
798 | 0d82d0e8 | Juan Quintela | { |
799 | 0d82d0e8 | Juan Quintela | QEMUFileBuffered *s; |
800 | 0d82d0e8 | Juan Quintela | |
801 | 2e450865 | Juan Quintela | migration_state->state = MIG_STATE_ACTIVE; |
802 | 2e450865 | Juan Quintela | migration_state->first_time = true;
|
803 | 0d82d0e8 | Juan Quintela | s = g_malloc0(sizeof(*s));
|
804 | 0d82d0e8 | Juan Quintela | |
805 | 0d82d0e8 | Juan Quintela | s->migration_state = migration_state; |
806 | 5b4e1eb7 | Juan Quintela | s->xfer_limit = s->migration_state->bandwidth_limit / XFER_LIMIT_RATIO; |
807 | 0d82d0e8 | Juan Quintela | s->migration_state->complete = false;
|
808 | 0d82d0e8 | Juan Quintela | |
809 | 0d82d0e8 | Juan Quintela | s->file = qemu_fopen_ops(s, &buffered_file_ops); |
810 | 0d82d0e8 | Juan Quintela | |
811 | 0d82d0e8 | Juan Quintela | migration_state->file = s->file; |
812 | 0d82d0e8 | Juan Quintela | |
813 | 0d82d0e8 | Juan Quintela | qemu_thread_create(&s->thread, buffered_file_thread, s, |
814 | 0d82d0e8 | Juan Quintela | QEMU_THREAD_DETACHED); |
815 | 0d3b26f5 | Juan Quintela | notifier_list_notify(&migration_state_notifiers, s); |
816 | 0d82d0e8 | Juan Quintela | } |