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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 | 5bb7910a | aliguori | */
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13 | 5bb7910a | aliguori | |
14 | 5bb7910a | aliguori | #include "qemu-common.h" |
15 | 5bb7910a | aliguori | #include "migration.h" |
16 | 376253ec | aliguori | #include "monitor.h" |
17 | 065e2813 | aliguori | #include "buffered_file.h" |
18 | 065e2813 | aliguori | #include "sysemu.h" |
19 | 065e2813 | aliguori | #include "block.h" |
20 | 065e2813 | aliguori | #include "qemu_socket.h" |
21 | 25f23643 | Jan Kiszka | #include "block-migration.h" |
22 | c86a6683 | Luiz Capitulino | #include "qemu-objects.h" |
23 | 065e2813 | aliguori | |
24 | 065e2813 | aliguori | //#define DEBUG_MIGRATION
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25 | 065e2813 | aliguori | |
26 | 065e2813 | aliguori | #ifdef DEBUG_MIGRATION
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27 | d0f2c4c6 | malc | #define DPRINTF(fmt, ...) \
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28 | 065e2813 | aliguori | do { printf("migration: " fmt, ## __VA_ARGS__); } while (0) |
29 | 065e2813 | aliguori | #else
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30 | d0f2c4c6 | malc | #define DPRINTF(fmt, ...) \
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31 | 065e2813 | aliguori | do { } while (0) |
32 | 065e2813 | aliguori | #endif
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33 | 5bb7910a | aliguori | |
34 | 5bb7910a | aliguori | /* Migration speed throttling */
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35 | 3d002df3 | Michael S. Tsirkin | static int64_t max_throttle = (32 << 20); |
36 | 5bb7910a | aliguori | |
37 | 5bb7910a | aliguori | static MigrationState *current_migration;
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38 | 5bb7910a | aliguori | |
39 | 99a0db9b | Gerd Hoffmann | static NotifierList migration_state_notifiers =
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40 | 99a0db9b | Gerd Hoffmann | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); |
41 | 99a0db9b | Gerd Hoffmann | |
42 | 8ca5e801 | Juan Quintela | int qemu_start_incoming_migration(const char *uri) |
43 | 5bb7910a | aliguori | { |
44 | 34c9dd8e | aliguori | const char *p; |
45 | 8ca5e801 | Juan Quintela | int ret;
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46 | 34c9dd8e | aliguori | |
47 | 34c9dd8e | aliguori | if (strstart(uri, "tcp:", &p)) |
48 | 8ca5e801 | Juan Quintela | ret = tcp_start_incoming_migration(p); |
49 | 065e2813 | aliguori | #if !defined(WIN32)
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50 | 065e2813 | aliguori | else if (strstart(uri, "exec:", &p)) |
51 | 8ca5e801 | Juan Quintela | ret = exec_start_incoming_migration(p); |
52 | 4951f65b | Chris Lalancette | else if (strstart(uri, "unix:", &p)) |
53 | 8ca5e801 | Juan Quintela | ret = unix_start_incoming_migration(p); |
54 | 5ac1fad3 | Paolo Bonzini | else if (strstart(uri, "fd:", &p)) |
55 | 8ca5e801 | Juan Quintela | ret = fd_start_incoming_migration(p); |
56 | 065e2813 | aliguori | #endif
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57 | 8ca5e801 | Juan Quintela | else {
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58 | 34c9dd8e | aliguori | fprintf(stderr, "unknown migration protocol: %s\n", uri);
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59 | 8ca5e801 | Juan Quintela | ret = -EPROTONOSUPPORT; |
60 | 8ca5e801 | Juan Quintela | } |
61 | 8ca5e801 | Juan Quintela | return ret;
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62 | 5bb7910a | aliguori | } |
63 | 5bb7910a | aliguori | |
64 | 511c0231 | Juan Quintela | void process_incoming_migration(QEMUFile *f)
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65 | 511c0231 | Juan Quintela | { |
66 | 511c0231 | Juan Quintela | if (qemu_loadvm_state(f) < 0) { |
67 | 511c0231 | Juan Quintela | fprintf(stderr, "load of migration failed\n");
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68 | 511c0231 | Juan Quintela | exit(0);
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69 | 511c0231 | Juan Quintela | } |
70 | 511c0231 | Juan Quintela | qemu_announce_self(); |
71 | 511c0231 | Juan Quintela | DPRINTF("successfully loaded vm state\n");
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72 | 511c0231 | Juan Quintela | |
73 | 8e84865e | Amit Shah | incoming_expected = false;
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74 | 8e84865e | Amit Shah | |
75 | 511c0231 | Juan Quintela | if (autostart)
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76 | 511c0231 | Juan Quintela | vm_start(); |
77 | 511c0231 | Juan Quintela | } |
78 | 511c0231 | Juan Quintela | |
79 | b5d17adb | Luiz Capitulino | int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data) |
80 | 5bb7910a | aliguori | { |
81 | 34c9dd8e | aliguori | MigrationState *s = NULL;
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82 | 34c9dd8e | aliguori | const char *p; |
83 | eb159d13 | Luiz Capitulino | int detach = qdict_get_try_bool(qdict, "detach", 0); |
84 | eb159d13 | Luiz Capitulino | int blk = qdict_get_try_bool(qdict, "blk", 0); |
85 | eb159d13 | Luiz Capitulino | int inc = qdict_get_try_bool(qdict, "inc", 0); |
86 | f18c16de | Luiz Capitulino | const char *uri = qdict_get_str(qdict, "uri"); |
87 | 1302425d | Jan Kiszka | |
88 | 1302425d | Jan Kiszka | if (current_migration &&
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89 | 1302425d | Jan Kiszka | current_migration->get_status(current_migration) == MIG_STATE_ACTIVE) { |
90 | 1302425d | Jan Kiszka | monitor_printf(mon, "migration already in progress\n");
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91 | b5d17adb | Luiz Capitulino | return -1; |
92 | 1302425d | Jan Kiszka | } |
93 | 1302425d | Jan Kiszka | |
94 | dc912121 | Alex Williamson | if (qemu_savevm_state_blocked(mon)) {
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95 | dc912121 | Alex Williamson | return -1; |
96 | dc912121 | Alex Williamson | } |
97 | dc912121 | Alex Williamson | |
98 | b5d17adb | Luiz Capitulino | if (strstart(uri, "tcp:", &p)) { |
99 | f327aa0c | Jan Kiszka | s = tcp_start_outgoing_migration(mon, p, max_throttle, detach, |
100 | eb159d13 | Luiz Capitulino | blk, inc); |
101 | 065e2813 | aliguori | #if !defined(WIN32)
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102 | b5d17adb | Luiz Capitulino | } else if (strstart(uri, "exec:", &p)) { |
103 | f327aa0c | Jan Kiszka | s = exec_start_outgoing_migration(mon, p, max_throttle, detach, |
104 | eb159d13 | Luiz Capitulino | blk, inc); |
105 | b5d17adb | Luiz Capitulino | } else if (strstart(uri, "unix:", &p)) { |
106 | f327aa0c | Jan Kiszka | s = unix_start_outgoing_migration(mon, p, max_throttle, detach, |
107 | eb159d13 | Luiz Capitulino | blk, inc); |
108 | b5d17adb | Luiz Capitulino | } else if (strstart(uri, "fd:", &p)) { |
109 | c163b5ca | lirans@il.ibm.com | s = fd_start_outgoing_migration(mon, p, max_throttle, detach, |
110 | eb159d13 | Luiz Capitulino | blk, inc); |
111 | 065e2813 | aliguori | #endif
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112 | b5d17adb | Luiz Capitulino | } else {
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113 | 376253ec | aliguori | monitor_printf(mon, "unknown migration protocol: %s\n", uri);
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114 | b5d17adb | Luiz Capitulino | return -1; |
115 | b5d17adb | Luiz Capitulino | } |
116 | 34c9dd8e | aliguori | |
117 | b5d17adb | Luiz Capitulino | if (s == NULL) { |
118 | 376253ec | aliguori | monitor_printf(mon, "migration failed\n");
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119 | b5d17adb | Luiz Capitulino | return -1; |
120 | b5d17adb | Luiz Capitulino | } |
121 | 34c9dd8e | aliguori | |
122 | b5d17adb | Luiz Capitulino | if (current_migration) {
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123 | b5d17adb | Luiz Capitulino | current_migration->release(current_migration); |
124 | 34c9dd8e | aliguori | } |
125 | b5d17adb | Luiz Capitulino | |
126 | b5d17adb | Luiz Capitulino | current_migration = s; |
127 | 99a0db9b | Gerd Hoffmann | notifier_list_notify(&migration_state_notifiers); |
128 | b5d17adb | Luiz Capitulino | return 0; |
129 | 5bb7910a | aliguori | } |
130 | 5bb7910a | aliguori | |
131 | ef4b7eee | Luiz Capitulino | int do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data) |
132 | 5bb7910a | aliguori | { |
133 | 5bb7910a | aliguori | MigrationState *s = current_migration; |
134 | 5bb7910a | aliguori | |
135 | 5bb7910a | aliguori | if (s)
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136 | ff8d81d8 | aliguori | s->cancel(s); |
137 | ef4b7eee | Luiz Capitulino | |
138 | ef4b7eee | Luiz Capitulino | return 0; |
139 | 5bb7910a | aliguori | } |
140 | 5bb7910a | aliguori | |
141 | ef4b7eee | Luiz Capitulino | int do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data) |
142 | 5bb7910a | aliguori | { |
143 | ed3d4a80 | Jes Sorensen | int64_t d; |
144 | daa91de2 | Glauber Costa | FdMigrationState *s; |
145 | 5bb7910a | aliguori | |
146 | ed3d4a80 | Jes Sorensen | d = qdict_get_int(qdict, "value");
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147 | 3d002df3 | Michael S. Tsirkin | if (d < 0) { |
148 | 3d002df3 | Michael S. Tsirkin | d = 0;
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149 | 3d002df3 | Michael S. Tsirkin | } |
150 | 5667c493 | Markus Armbruster | max_throttle = d; |
151 | daa91de2 | Glauber Costa | |
152 | 5d39c799 | Jan Kiszka | s = migrate_to_fms(current_migration); |
153 | 5d39c799 | Jan Kiszka | if (s && s->file) {
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154 | daa91de2 | Glauber Costa | qemu_file_set_rate_limit(s->file, max_throttle); |
155 | daa91de2 | Glauber Costa | } |
156 | ef4b7eee | Luiz Capitulino | |
157 | ef4b7eee | Luiz Capitulino | return 0; |
158 | 5bb7910a | aliguori | } |
159 | 5bb7910a | aliguori | |
160 | a0a3fd60 | Glauber Costa | /* amount of nanoseconds we are willing to wait for migration to be down.
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161 | a0a3fd60 | Glauber Costa | * the choice of nanoseconds is because it is the maximum resolution that
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162 | a0a3fd60 | Glauber Costa | * get_clock() can achieve. It is an internal measure. All user-visible
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163 | a0a3fd60 | Glauber Costa | * units must be in seconds */
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164 | a0a3fd60 | Glauber Costa | static uint64_t max_downtime = 30000000; |
165 | a0a3fd60 | Glauber Costa | |
166 | a0a3fd60 | Glauber Costa | uint64_t migrate_max_downtime(void)
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167 | a0a3fd60 | Glauber Costa | { |
168 | a0a3fd60 | Glauber Costa | return max_downtime;
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169 | a0a3fd60 | Glauber Costa | } |
170 | a0a3fd60 | Glauber Costa | |
171 | ef4b7eee | Luiz Capitulino | int do_migrate_set_downtime(Monitor *mon, const QDict *qdict, |
172 | ef4b7eee | Luiz Capitulino | QObject **ret_data) |
173 | 2ea42952 | Glauber Costa | { |
174 | 2ea42952 | Glauber Costa | double d;
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175 | 2ea42952 | Glauber Costa | |
176 | b0fbf7d3 | Markus Armbruster | d = qdict_get_double(qdict, "value") * 1e9; |
177 | b0fbf7d3 | Markus Armbruster | d = MAX(0, MIN(UINT64_MAX, d));
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178 | 2ea42952 | Glauber Costa | max_downtime = (uint64_t)d; |
179 | ef4b7eee | Luiz Capitulino | |
180 | ef4b7eee | Luiz Capitulino | return 0; |
181 | 2ea42952 | Glauber Costa | } |
182 | 2ea42952 | Glauber Costa | |
183 | c86a6683 | Luiz Capitulino | static void migrate_print_status(Monitor *mon, const char *name, |
184 | c86a6683 | Luiz Capitulino | const QDict *status_dict)
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185 | 5bb7910a | aliguori | { |
186 | c86a6683 | Luiz Capitulino | QDict *qdict; |
187 | c86a6683 | Luiz Capitulino | |
188 | c86a6683 | Luiz Capitulino | qdict = qobject_to_qdict(qdict_get(status_dict, name)); |
189 | c86a6683 | Luiz Capitulino | |
190 | c86a6683 | Luiz Capitulino | monitor_printf(mon, "transferred %s: %" PRIu64 " kbytes\n", name, |
191 | c86a6683 | Luiz Capitulino | qdict_get_int(qdict, "transferred") >> 10); |
192 | c86a6683 | Luiz Capitulino | monitor_printf(mon, "remaining %s: %" PRIu64 " kbytes\n", name, |
193 | c86a6683 | Luiz Capitulino | qdict_get_int(qdict, "remaining") >> 10); |
194 | c86a6683 | Luiz Capitulino | monitor_printf(mon, "total %s: %" PRIu64 " kbytes\n", name, |
195 | c86a6683 | Luiz Capitulino | qdict_get_int(qdict, "total") >> 10); |
196 | c86a6683 | Luiz Capitulino | } |
197 | c86a6683 | Luiz Capitulino | |
198 | c86a6683 | Luiz Capitulino | void do_info_migrate_print(Monitor *mon, const QObject *data) |
199 | c86a6683 | Luiz Capitulino | { |
200 | c86a6683 | Luiz Capitulino | QDict *qdict; |
201 | c86a6683 | Luiz Capitulino | |
202 | c86a6683 | Luiz Capitulino | qdict = qobject_to_qdict(data); |
203 | c86a6683 | Luiz Capitulino | |
204 | c86a6683 | Luiz Capitulino | monitor_printf(mon, "Migration status: %s\n",
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205 | c86a6683 | Luiz Capitulino | qdict_get_str(qdict, "status"));
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206 | c86a6683 | Luiz Capitulino | |
207 | c86a6683 | Luiz Capitulino | if (qdict_haskey(qdict, "ram")) { |
208 | c86a6683 | Luiz Capitulino | migrate_print_status(mon, "ram", qdict);
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209 | c86a6683 | Luiz Capitulino | } |
210 | c86a6683 | Luiz Capitulino | |
211 | c86a6683 | Luiz Capitulino | if (qdict_haskey(qdict, "disk")) { |
212 | c86a6683 | Luiz Capitulino | migrate_print_status(mon, "disk", qdict);
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213 | c86a6683 | Luiz Capitulino | } |
214 | c86a6683 | Luiz Capitulino | } |
215 | c86a6683 | Luiz Capitulino | |
216 | c86a6683 | Luiz Capitulino | static void migrate_put_status(QDict *qdict, const char *name, |
217 | c86a6683 | Luiz Capitulino | uint64_t trans, uint64_t rem, uint64_t total) |
218 | c86a6683 | Luiz Capitulino | { |
219 | c86a6683 | Luiz Capitulino | QObject *obj; |
220 | c86a6683 | Luiz Capitulino | |
221 | c86a6683 | Luiz Capitulino | obj = qobject_from_jsonf("{ 'transferred': %" PRId64 ", " |
222 | c86a6683 | Luiz Capitulino | "'remaining': %" PRId64 ", " |
223 | c86a6683 | Luiz Capitulino | "'total': %" PRId64 " }", trans, rem, total); |
224 | c86a6683 | Luiz Capitulino | qdict_put_obj(qdict, name, obj); |
225 | c86a6683 | Luiz Capitulino | } |
226 | c86a6683 | Luiz Capitulino | |
227 | c86a6683 | Luiz Capitulino | void do_info_migrate(Monitor *mon, QObject **ret_data)
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228 | c86a6683 | Luiz Capitulino | { |
229 | c86a6683 | Luiz Capitulino | QDict *qdict; |
230 | 5bb7910a | aliguori | MigrationState *s = current_migration; |
231 | 376253ec | aliguori | |
232 | 5bb7910a | aliguori | if (s) {
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233 | ff8d81d8 | aliguori | switch (s->get_status(s)) {
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234 | ff8d81d8 | aliguori | case MIG_STATE_ACTIVE:
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235 | c86a6683 | Luiz Capitulino | qdict = qdict_new(); |
236 | c86a6683 | Luiz Capitulino | qdict_put(qdict, "status", qstring_from_str("active")); |
237 | c86a6683 | Luiz Capitulino | |
238 | c86a6683 | Luiz Capitulino | migrate_put_status(qdict, "ram", ram_bytes_transferred(),
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239 | c86a6683 | Luiz Capitulino | ram_bytes_remaining(), ram_bytes_total()); |
240 | c86a6683 | Luiz Capitulino | |
241 | 25f23643 | Jan Kiszka | if (blk_mig_active()) {
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242 | c86a6683 | Luiz Capitulino | migrate_put_status(qdict, "disk", blk_mig_bytes_transferred(),
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243 | c86a6683 | Luiz Capitulino | blk_mig_bytes_remaining(), |
244 | c86a6683 | Luiz Capitulino | blk_mig_bytes_total()); |
245 | 25f23643 | Jan Kiszka | } |
246 | c86a6683 | Luiz Capitulino | |
247 | c86a6683 | Luiz Capitulino | *ret_data = QOBJECT(qdict); |
248 | ff8d81d8 | aliguori | break;
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249 | ff8d81d8 | aliguori | case MIG_STATE_COMPLETED:
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250 | c86a6683 | Luiz Capitulino | *ret_data = qobject_from_jsonf("{ 'status': 'completed' }");
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251 | ff8d81d8 | aliguori | break;
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252 | ff8d81d8 | aliguori | case MIG_STATE_ERROR:
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253 | c86a6683 | Luiz Capitulino | *ret_data = qobject_from_jsonf("{ 'status': 'failed' }");
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254 | ff8d81d8 | aliguori | break;
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255 | ff8d81d8 | aliguori | case MIG_STATE_CANCELLED:
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256 | c86a6683 | Luiz Capitulino | *ret_data = qobject_from_jsonf("{ 'status': 'cancelled' }");
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257 | ff8d81d8 | aliguori | break;
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258 | ff8d81d8 | aliguori | } |
259 | 5bb7910a | aliguori | } |
260 | 5bb7910a | aliguori | } |
261 | 5bb7910a | aliguori | |
262 | 065e2813 | aliguori | /* shared migration helpers */
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263 | 065e2813 | aliguori | |
264 | f327aa0c | Jan Kiszka | void migrate_fd_monitor_suspend(FdMigrationState *s, Monitor *mon)
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265 | 731b0364 | aliguori | { |
266 | f327aa0c | Jan Kiszka | s->mon = mon; |
267 | f327aa0c | Jan Kiszka | if (monitor_suspend(mon) == 0) { |
268 | d0f2c4c6 | malc | DPRINTF("suspending monitor\n");
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269 | f327aa0c | Jan Kiszka | } else {
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270 | f327aa0c | Jan Kiszka | monitor_printf(mon, "terminal does not allow synchronous "
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271 | cde76ee1 | aliguori | "migration, continuing detached\n");
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272 | f327aa0c | Jan Kiszka | } |
273 | 731b0364 | aliguori | } |
274 | 731b0364 | aliguori | |
275 | 065e2813 | aliguori | void migrate_fd_error(FdMigrationState *s)
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276 | 065e2813 | aliguori | { |
277 | d0f2c4c6 | malc | DPRINTF("setting error state\n");
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278 | 065e2813 | aliguori | s->state = MIG_STATE_ERROR; |
279 | 99a0db9b | Gerd Hoffmann | notifier_list_notify(&migration_state_notifiers); |
280 | 065e2813 | aliguori | migrate_fd_cleanup(s); |
281 | 065e2813 | aliguori | } |
282 | 065e2813 | aliguori | |
283 | 41ef56e6 | Anthony Liguori | int migrate_fd_cleanup(FdMigrationState *s)
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284 | 065e2813 | aliguori | { |
285 | 41ef56e6 | Anthony Liguori | int ret = 0; |
286 | 41ef56e6 | Anthony Liguori | |
287 | 065e2813 | aliguori | qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); |
288 | 065e2813 | aliguori | |
289 | 065e2813 | aliguori | if (s->file) {
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290 | d0f2c4c6 | malc | DPRINTF("closing file\n");
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291 | 41ef56e6 | Anthony Liguori | if (qemu_fclose(s->file) != 0) { |
292 | 41ef56e6 | Anthony Liguori | ret = -1;
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293 | 41ef56e6 | Anthony Liguori | } |
294 | 5d39c799 | Jan Kiszka | s->file = NULL;
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295 | 065e2813 | aliguori | } |
296 | 065e2813 | aliguori | |
297 | 065e2813 | aliguori | if (s->fd != -1) |
298 | 065e2813 | aliguori | close(s->fd); |
299 | 065e2813 | aliguori | |
300 | 065e2813 | aliguori | /* Don't resume monitor until we've flushed all of the buffers */
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301 | f327aa0c | Jan Kiszka | if (s->mon) {
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302 | f327aa0c | Jan Kiszka | monitor_resume(s->mon); |
303 | f327aa0c | Jan Kiszka | } |
304 | 065e2813 | aliguori | |
305 | 065e2813 | aliguori | s->fd = -1;
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306 | 41ef56e6 | Anthony Liguori | |
307 | 41ef56e6 | Anthony Liguori | return ret;
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308 | 065e2813 | aliguori | } |
309 | 065e2813 | aliguori | |
310 | 065e2813 | aliguori | void migrate_fd_put_notify(void *opaque) |
311 | 065e2813 | aliguori | { |
312 | 065e2813 | aliguori | FdMigrationState *s = opaque; |
313 | 065e2813 | aliguori | |
314 | 065e2813 | aliguori | qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); |
315 | 065e2813 | aliguori | qemu_file_put_notify(s->file); |
316 | 065e2813 | aliguori | } |
317 | 065e2813 | aliguori | |
318 | 065e2813 | aliguori | ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size) |
319 | 065e2813 | aliguori | { |
320 | 065e2813 | aliguori | FdMigrationState *s = opaque; |
321 | 065e2813 | aliguori | ssize_t ret; |
322 | 065e2813 | aliguori | |
323 | 065e2813 | aliguori | do {
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324 | 065e2813 | aliguori | ret = s->write(s, data, size); |
325 | 95b134ea | Uri Lublin | } while (ret == -1 && ((s->get_error(s)) == EINTR)); |
326 | 065e2813 | aliguori | |
327 | 065e2813 | aliguori | if (ret == -1) |
328 | 065e2813 | aliguori | ret = -(s->get_error(s)); |
329 | 065e2813 | aliguori | |
330 | e447b1a6 | Marcelo Tosatti | if (ret == -EAGAIN) {
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331 | 065e2813 | aliguori | qemu_set_fd_handler2(s->fd, NULL, NULL, migrate_fd_put_notify, s); |
332 | e447b1a6 | Marcelo Tosatti | } else if (ret < 0) { |
333 | e447b1a6 | Marcelo Tosatti | if (s->mon) {
|
334 | e447b1a6 | Marcelo Tosatti | monitor_resume(s->mon); |
335 | e447b1a6 | Marcelo Tosatti | } |
336 | e447b1a6 | Marcelo Tosatti | s->state = MIG_STATE_ERROR; |
337 | 99a0db9b | Gerd Hoffmann | notifier_list_notify(&migration_state_notifiers); |
338 | e447b1a6 | Marcelo Tosatti | } |
339 | 065e2813 | aliguori | |
340 | 065e2813 | aliguori | return ret;
|
341 | 065e2813 | aliguori | } |
342 | 065e2813 | aliguori | |
343 | 065e2813 | aliguori | void migrate_fd_connect(FdMigrationState *s)
|
344 | 065e2813 | aliguori | { |
345 | 065e2813 | aliguori | int ret;
|
346 | 065e2813 | aliguori | |
347 | 065e2813 | aliguori | s->file = qemu_fopen_ops_buffered(s, |
348 | 065e2813 | aliguori | s->bandwidth_limit, |
349 | 065e2813 | aliguori | migrate_fd_put_buffer, |
350 | 065e2813 | aliguori | migrate_fd_put_ready, |
351 | 065e2813 | aliguori | migrate_fd_wait_for_unfreeze, |
352 | 065e2813 | aliguori | migrate_fd_close); |
353 | 065e2813 | aliguori | |
354 | d0f2c4c6 | malc | DPRINTF("beginning savevm\n");
|
355 | f327aa0c | Jan Kiszka | ret = qemu_savevm_state_begin(s->mon, s->file, s->mig_state.blk, |
356 | c163b5ca | lirans@il.ibm.com | s->mig_state.shared); |
357 | 065e2813 | aliguori | if (ret < 0) { |
358 | d0f2c4c6 | malc | DPRINTF("failed, %d\n", ret);
|
359 | 065e2813 | aliguori | migrate_fd_error(s); |
360 | 065e2813 | aliguori | return;
|
361 | 065e2813 | aliguori | } |
362 | c163b5ca | lirans@il.ibm.com | |
363 | 065e2813 | aliguori | migrate_fd_put_ready(s); |
364 | 065e2813 | aliguori | } |
365 | 065e2813 | aliguori | |
366 | 065e2813 | aliguori | void migrate_fd_put_ready(void *opaque) |
367 | 065e2813 | aliguori | { |
368 | 065e2813 | aliguori | FdMigrationState *s = opaque; |
369 | 065e2813 | aliguori | |
370 | 065e2813 | aliguori | if (s->state != MIG_STATE_ACTIVE) {
|
371 | d0f2c4c6 | malc | DPRINTF("put_ready returning because of non-active state\n");
|
372 | 065e2813 | aliguori | return;
|
373 | 065e2813 | aliguori | } |
374 | 065e2813 | aliguori | |
375 | d0f2c4c6 | malc | DPRINTF("iterate\n");
|
376 | f327aa0c | Jan Kiszka | if (qemu_savevm_state_iterate(s->mon, s->file) == 1) { |
377 | b161d123 | aliguori | int state;
|
378 | eeb34af9 | Anthony Liguori | int old_vm_running = vm_running;
|
379 | eeb34af9 | Anthony Liguori | |
380 | d0f2c4c6 | malc | DPRINTF("done iterating\n");
|
381 | e07bbac5 | Jan Kiszka | vm_stop(VMSTOP_MIGRATE); |
382 | 065e2813 | aliguori | |
383 | f327aa0c | Jan Kiszka | if ((qemu_savevm_state_complete(s->mon, s->file)) < 0) { |
384 | eeb34af9 | Anthony Liguori | if (old_vm_running) {
|
385 | eeb34af9 | Anthony Liguori | vm_start(); |
386 | eeb34af9 | Anthony Liguori | } |
387 | b161d123 | aliguori | state = MIG_STATE_ERROR; |
388 | b161d123 | aliguori | } else {
|
389 | b161d123 | aliguori | state = MIG_STATE_COMPLETED; |
390 | b161d123 | aliguori | } |
391 | 41ef56e6 | Anthony Liguori | if (migrate_fd_cleanup(s) < 0) { |
392 | 41ef56e6 | Anthony Liguori | if (old_vm_running) {
|
393 | 41ef56e6 | Anthony Liguori | vm_start(); |
394 | 41ef56e6 | Anthony Liguori | } |
395 | 41ef56e6 | Anthony Liguori | state = MIG_STATE_ERROR; |
396 | 41ef56e6 | Anthony Liguori | } |
397 | b161d123 | aliguori | s->state = state; |
398 | 99a0db9b | Gerd Hoffmann | notifier_list_notify(&migration_state_notifiers); |
399 | 065e2813 | aliguori | } |
400 | 065e2813 | aliguori | } |
401 | 065e2813 | aliguori | |
402 | 065e2813 | aliguori | int migrate_fd_get_status(MigrationState *mig_state)
|
403 | 065e2813 | aliguori | { |
404 | 065e2813 | aliguori | FdMigrationState *s = migrate_to_fms(mig_state); |
405 | 065e2813 | aliguori | return s->state;
|
406 | 065e2813 | aliguori | } |
407 | 065e2813 | aliguori | |
408 | 065e2813 | aliguori | void migrate_fd_cancel(MigrationState *mig_state)
|
409 | 065e2813 | aliguori | { |
410 | 065e2813 | aliguori | FdMigrationState *s = migrate_to_fms(mig_state); |
411 | 065e2813 | aliguori | |
412 | 065e2813 | aliguori | if (s->state != MIG_STATE_ACTIVE)
|
413 | 065e2813 | aliguori | return;
|
414 | 065e2813 | aliguori | |
415 | d0f2c4c6 | malc | DPRINTF("cancelling migration\n");
|
416 | 065e2813 | aliguori | |
417 | 065e2813 | aliguori | s->state = MIG_STATE_CANCELLED; |
418 | 99a0db9b | Gerd Hoffmann | notifier_list_notify(&migration_state_notifiers); |
419 | f327aa0c | Jan Kiszka | qemu_savevm_state_cancel(s->mon, s->file); |
420 | 065e2813 | aliguori | |
421 | 065e2813 | aliguori | migrate_fd_cleanup(s); |
422 | 065e2813 | aliguori | } |
423 | 065e2813 | aliguori | |
424 | 065e2813 | aliguori | void migrate_fd_release(MigrationState *mig_state)
|
425 | 065e2813 | aliguori | { |
426 | 065e2813 | aliguori | FdMigrationState *s = migrate_to_fms(mig_state); |
427 | 065e2813 | aliguori | |
428 | d0f2c4c6 | malc | DPRINTF("releasing state\n");
|
429 | 065e2813 | aliguori | |
430 | 065e2813 | aliguori | if (s->state == MIG_STATE_ACTIVE) {
|
431 | 065e2813 | aliguori | s->state = MIG_STATE_CANCELLED; |
432 | 99a0db9b | Gerd Hoffmann | notifier_list_notify(&migration_state_notifiers); |
433 | 065e2813 | aliguori | migrate_fd_cleanup(s); |
434 | 065e2813 | aliguori | } |
435 | faa1f8dd | Yoshiaki Tamura | qemu_free(s); |
436 | 065e2813 | aliguori | } |
437 | 065e2813 | aliguori | |
438 | 065e2813 | aliguori | void migrate_fd_wait_for_unfreeze(void *opaque) |
439 | 065e2813 | aliguori | { |
440 | 065e2813 | aliguori | FdMigrationState *s = opaque; |
441 | 065e2813 | aliguori | int ret;
|
442 | 065e2813 | aliguori | |
443 | d0f2c4c6 | malc | DPRINTF("wait for unfreeze\n");
|
444 | 065e2813 | aliguori | if (s->state != MIG_STATE_ACTIVE)
|
445 | 065e2813 | aliguori | return;
|
446 | 065e2813 | aliguori | |
447 | 065e2813 | aliguori | do {
|
448 | 065e2813 | aliguori | fd_set wfds; |
449 | 065e2813 | aliguori | |
450 | 065e2813 | aliguori | FD_ZERO(&wfds); |
451 | 065e2813 | aliguori | FD_SET(s->fd, &wfds); |
452 | 065e2813 | aliguori | |
453 | 065e2813 | aliguori | ret = select(s->fd + 1, NULL, &wfds, NULL, NULL); |
454 | 065e2813 | aliguori | } while (ret == -1 && (s->get_error(s)) == EINTR); |
455 | 065e2813 | aliguori | } |
456 | 065e2813 | aliguori | |
457 | 065e2813 | aliguori | int migrate_fd_close(void *opaque) |
458 | 065e2813 | aliguori | { |
459 | 065e2813 | aliguori | FdMigrationState *s = opaque; |
460 | e19252d3 | Uri Lublin | |
461 | e19252d3 | Uri Lublin | qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); |
462 | 065e2813 | aliguori | return s->close(s);
|
463 | 065e2813 | aliguori | } |
464 | 99a0db9b | Gerd Hoffmann | |
465 | 99a0db9b | Gerd Hoffmann | void add_migration_state_change_notifier(Notifier *notify)
|
466 | 99a0db9b | Gerd Hoffmann | { |
467 | 99a0db9b | Gerd Hoffmann | notifier_list_add(&migration_state_notifiers, notify); |
468 | 99a0db9b | Gerd Hoffmann | } |
469 | 99a0db9b | Gerd Hoffmann | |
470 | 99a0db9b | Gerd Hoffmann | void remove_migration_state_change_notifier(Notifier *notify)
|
471 | 99a0db9b | Gerd Hoffmann | { |
472 | 99a0db9b | Gerd Hoffmann | notifier_list_remove(&migration_state_notifiers, notify); |
473 | 99a0db9b | Gerd Hoffmann | } |
474 | 99a0db9b | Gerd Hoffmann | |
475 | 99a0db9b | Gerd Hoffmann | int get_migration_state(void) |
476 | 99a0db9b | Gerd Hoffmann | { |
477 | 99a0db9b | Gerd Hoffmann | if (current_migration) {
|
478 | 99a0db9b | Gerd Hoffmann | return migrate_fd_get_status(current_migration);
|
479 | 99a0db9b | Gerd Hoffmann | } else {
|
480 | 99a0db9b | Gerd Hoffmann | return MIG_STATE_ERROR;
|
481 | 99a0db9b | Gerd Hoffmann | } |
482 | 99a0db9b | Gerd Hoffmann | } |