root / migration.c @ 86f3dba6
History | View | Annotate | Download (12.5 kB)
1 | 5bb7910a | aliguori | /*
|
---|---|---|---|
2 | 5bb7910a | aliguori | * QEMU live migration
|
3 | 5bb7910a | aliguori | *
|
4 | 5bb7910a | aliguori | * Copyright IBM, Corp. 2008
|
5 | 5bb7910a | aliguori | *
|
6 | 5bb7910a | aliguori | * Authors:
|
7 | 5bb7910a | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
|
8 | 5bb7910a | aliguori | *
|
9 | 5bb7910a | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
|
10 | 5bb7910a | aliguori | * the COPYING file in the top-level directory.
|
11 | 5bb7910a | aliguori | *
|
12 | 5bb7910a | aliguori | */
|
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
|
25 | 065e2813 | aliguori | |
26 | 065e2813 | aliguori | #ifdef DEBUG_MIGRATION
|
27 | 065e2813 | aliguori | #define dprintf(fmt, ...) \
|
28 | 065e2813 | aliguori | do { printf("migration: " fmt, ## __VA_ARGS__); } while (0) |
29 | 065e2813 | aliguori | #else
|
30 | 065e2813 | aliguori | #define dprintf(fmt, ...) \
|
31 | 065e2813 | aliguori | do { } while (0) |
32 | 065e2813 | aliguori | #endif
|
33 | 5bb7910a | aliguori | |
34 | 5bb7910a | aliguori | /* Migration speed throttling */
|
35 | 5bb7910a | aliguori | static uint32_t max_throttle = (32 << 20); |
36 | 5bb7910a | aliguori | |
37 | 5bb7910a | aliguori | static MigrationState *current_migration;
|
38 | 5bb7910a | aliguori | |
39 | 5bb7910a | aliguori | void qemu_start_incoming_migration(const char *uri) |
40 | 5bb7910a | aliguori | { |
41 | 34c9dd8e | aliguori | const char *p; |
42 | 34c9dd8e | aliguori | |
43 | 34c9dd8e | aliguori | if (strstart(uri, "tcp:", &p)) |
44 | 34c9dd8e | aliguori | tcp_start_incoming_migration(p); |
45 | 065e2813 | aliguori | #if !defined(WIN32)
|
46 | 065e2813 | aliguori | else if (strstart(uri, "exec:", &p)) |
47 | 065e2813 | aliguori | exec_start_incoming_migration(p); |
48 | 4951f65b | Chris Lalancette | else if (strstart(uri, "unix:", &p)) |
49 | 4951f65b | Chris Lalancette | unix_start_incoming_migration(p); |
50 | 5ac1fad3 | Paolo Bonzini | else if (strstart(uri, "fd:", &p)) |
51 | 5ac1fad3 | Paolo Bonzini | fd_start_incoming_migration(p); |
52 | 065e2813 | aliguori | #endif
|
53 | 34c9dd8e | aliguori | else
|
54 | 34c9dd8e | aliguori | fprintf(stderr, "unknown migration protocol: %s\n", uri);
|
55 | 5bb7910a | aliguori | } |
56 | 5bb7910a | aliguori | |
57 | 5f79da00 | Luiz Capitulino | void do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data) |
58 | 5bb7910a | aliguori | { |
59 | 34c9dd8e | aliguori | MigrationState *s = NULL;
|
60 | 34c9dd8e | aliguori | const char *p; |
61 | f18c16de | Luiz Capitulino | int detach = qdict_get_int(qdict, "detach"); |
62 | f18c16de | Luiz Capitulino | const char *uri = qdict_get_str(qdict, "uri"); |
63 | 1302425d | Jan Kiszka | |
64 | 1302425d | Jan Kiszka | if (current_migration &&
|
65 | 1302425d | Jan Kiszka | current_migration->get_status(current_migration) == MIG_STATE_ACTIVE) { |
66 | 1302425d | Jan Kiszka | monitor_printf(mon, "migration already in progress\n");
|
67 | 1302425d | Jan Kiszka | return;
|
68 | 1302425d | Jan Kiszka | } |
69 | 1302425d | Jan Kiszka | |
70 | 34c9dd8e | aliguori | if (strstart(uri, "tcp:", &p)) |
71 | f327aa0c | Jan Kiszka | s = tcp_start_outgoing_migration(mon, p, max_throttle, detach, |
72 | c163b5ca | lirans@il.ibm.com | (int)qdict_get_int(qdict, "blk"), |
73 | c163b5ca | lirans@il.ibm.com | (int)qdict_get_int(qdict, "inc")); |
74 | 065e2813 | aliguori | #if !defined(WIN32)
|
75 | 065e2813 | aliguori | else if (strstart(uri, "exec:", &p)) |
76 | f327aa0c | Jan Kiszka | s = exec_start_outgoing_migration(mon, p, max_throttle, detach, |
77 | c163b5ca | lirans@il.ibm.com | (int)qdict_get_int(qdict, "blk"), |
78 | c163b5ca | lirans@il.ibm.com | (int)qdict_get_int(qdict, "inc")); |
79 | 4951f65b | Chris Lalancette | else if (strstart(uri, "unix:", &p)) |
80 | f327aa0c | Jan Kiszka | s = unix_start_outgoing_migration(mon, p, max_throttle, detach, |
81 | c163b5ca | lirans@il.ibm.com | (int)qdict_get_int(qdict, "blk"), |
82 | c163b5ca | lirans@il.ibm.com | (int)qdict_get_int(qdict, "inc")); |
83 | 5ac1fad3 | Paolo Bonzini | else if (strstart(uri, "fd:", &p)) |
84 | c163b5ca | lirans@il.ibm.com | s = fd_start_outgoing_migration(mon, p, max_throttle, detach, |
85 | c163b5ca | lirans@il.ibm.com | (int)qdict_get_int(qdict, "blk"), |
86 | c163b5ca | lirans@il.ibm.com | (int)qdict_get_int(qdict, "inc")); |
87 | 065e2813 | aliguori | #endif
|
88 | 34c9dd8e | aliguori | else
|
89 | 376253ec | aliguori | monitor_printf(mon, "unknown migration protocol: %s\n", uri);
|
90 | 34c9dd8e | aliguori | |
91 | 34c9dd8e | aliguori | if (s == NULL) |
92 | 376253ec | aliguori | monitor_printf(mon, "migration failed\n");
|
93 | 34c9dd8e | aliguori | else {
|
94 | ff8d81d8 | aliguori | if (current_migration)
|
95 | ff8d81d8 | aliguori | current_migration->release(current_migration); |
96 | 34c9dd8e | aliguori | |
97 | ff8d81d8 | aliguori | current_migration = s; |
98 | 34c9dd8e | aliguori | } |
99 | 5bb7910a | aliguori | } |
100 | 5bb7910a | aliguori | |
101 | 911d2963 | Luiz Capitulino | void do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data) |
102 | 5bb7910a | aliguori | { |
103 | 5bb7910a | aliguori | MigrationState *s = current_migration; |
104 | 5bb7910a | aliguori | |
105 | 5bb7910a | aliguori | if (s)
|
106 | ff8d81d8 | aliguori | s->cancel(s); |
107 | 5bb7910a | aliguori | } |
108 | 5bb7910a | aliguori | |
109 | 3a492104 | Luiz Capitulino | void do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data) |
110 | 5bb7910a | aliguori | { |
111 | 5bb7910a | aliguori | double d;
|
112 | 5bb7910a | aliguori | char *ptr;
|
113 | daa91de2 | Glauber Costa | FdMigrationState *s; |
114 | d54908a5 | Luiz Capitulino | const char *value = qdict_get_str(qdict, "value"); |
115 | 5bb7910a | aliguori | |
116 | 5bb7910a | aliguori | d = strtod(value, &ptr); |
117 | 5bb7910a | aliguori | switch (*ptr) {
|
118 | 5bb7910a | aliguori | case 'G': case 'g': |
119 | ff8d81d8 | aliguori | d *= 1024;
|
120 | 5bb7910a | aliguori | case 'M': case 'm': |
121 | ff8d81d8 | aliguori | d *= 1024;
|
122 | 5bb7910a | aliguori | case 'K': case 'k': |
123 | ff8d81d8 | aliguori | d *= 1024;
|
124 | 5bb7910a | aliguori | default:
|
125 | ff8d81d8 | aliguori | break;
|
126 | 5bb7910a | aliguori | } |
127 | 5bb7910a | aliguori | |
128 | 5bb7910a | aliguori | max_throttle = (uint32_t)d; |
129 | daa91de2 | Glauber Costa | |
130 | 5d39c799 | Jan Kiszka | s = migrate_to_fms(current_migration); |
131 | 5d39c799 | Jan Kiszka | if (s && s->file) {
|
132 | daa91de2 | Glauber Costa | qemu_file_set_rate_limit(s->file, max_throttle); |
133 | daa91de2 | Glauber Costa | } |
134 | 5bb7910a | aliguori | } |
135 | 5bb7910a | aliguori | |
136 | a0a3fd60 | Glauber Costa | /* amount of nanoseconds we are willing to wait for migration to be down.
|
137 | a0a3fd60 | Glauber Costa | * the choice of nanoseconds is because it is the maximum resolution that
|
138 | a0a3fd60 | Glauber Costa | * get_clock() can achieve. It is an internal measure. All user-visible
|
139 | a0a3fd60 | Glauber Costa | * units must be in seconds */
|
140 | a0a3fd60 | Glauber Costa | static uint64_t max_downtime = 30000000; |
141 | a0a3fd60 | Glauber Costa | |
142 | a0a3fd60 | Glauber Costa | uint64_t migrate_max_downtime(void)
|
143 | a0a3fd60 | Glauber Costa | { |
144 | a0a3fd60 | Glauber Costa | return max_downtime;
|
145 | a0a3fd60 | Glauber Costa | } |
146 | a0a3fd60 | Glauber Costa | |
147 | d54908a5 | Luiz Capitulino | void do_migrate_set_downtime(Monitor *mon, const QDict *qdict) |
148 | 2ea42952 | Glauber Costa | { |
149 | 2ea42952 | Glauber Costa | char *ptr;
|
150 | 2ea42952 | Glauber Costa | double d;
|
151 | d54908a5 | Luiz Capitulino | const char *value = qdict_get_str(qdict, "value"); |
152 | 2ea42952 | Glauber Costa | |
153 | 2ea42952 | Glauber Costa | d = strtod(value, &ptr); |
154 | 2ea42952 | Glauber Costa | if (!strcmp(ptr,"ms")) { |
155 | 2ea42952 | Glauber Costa | d *= 1000000;
|
156 | 2ea42952 | Glauber Costa | } else if (!strcmp(ptr,"us")) { |
157 | 2ea42952 | Glauber Costa | d *= 1000;
|
158 | 2ea42952 | Glauber Costa | } else if (!strcmp(ptr,"ns")) { |
159 | 2ea42952 | Glauber Costa | } else {
|
160 | 2ea42952 | Glauber Costa | /* all else considered to be seconds */
|
161 | 2ea42952 | Glauber Costa | d *= 1000000000;
|
162 | 2ea42952 | Glauber Costa | } |
163 | 2ea42952 | Glauber Costa | |
164 | 2ea42952 | Glauber Costa | max_downtime = (uint64_t)d; |
165 | 2ea42952 | Glauber Costa | } |
166 | 2ea42952 | Glauber Costa | |
167 | c86a6683 | Luiz Capitulino | static void migrate_print_status(Monitor *mon, const char *name, |
168 | c86a6683 | Luiz Capitulino | const QDict *status_dict)
|
169 | 5bb7910a | aliguori | { |
170 | c86a6683 | Luiz Capitulino | QDict *qdict; |
171 | c86a6683 | Luiz Capitulino | |
172 | c86a6683 | Luiz Capitulino | qdict = qobject_to_qdict(qdict_get(status_dict, name)); |
173 | c86a6683 | Luiz Capitulino | |
174 | c86a6683 | Luiz Capitulino | monitor_printf(mon, "transferred %s: %" PRIu64 " kbytes\n", name, |
175 | c86a6683 | Luiz Capitulino | qdict_get_int(qdict, "transferred") >> 10); |
176 | c86a6683 | Luiz Capitulino | monitor_printf(mon, "remaining %s: %" PRIu64 " kbytes\n", name, |
177 | c86a6683 | Luiz Capitulino | qdict_get_int(qdict, "remaining") >> 10); |
178 | c86a6683 | Luiz Capitulino | monitor_printf(mon, "total %s: %" PRIu64 " kbytes\n", name, |
179 | c86a6683 | Luiz Capitulino | qdict_get_int(qdict, "total") >> 10); |
180 | c86a6683 | Luiz Capitulino | } |
181 | c86a6683 | Luiz Capitulino | |
182 | c86a6683 | Luiz Capitulino | void do_info_migrate_print(Monitor *mon, const QObject *data) |
183 | c86a6683 | Luiz Capitulino | { |
184 | c86a6683 | Luiz Capitulino | QDict *qdict; |
185 | c86a6683 | Luiz Capitulino | |
186 | c86a6683 | Luiz Capitulino | qdict = qobject_to_qdict(data); |
187 | c86a6683 | Luiz Capitulino | |
188 | c86a6683 | Luiz Capitulino | monitor_printf(mon, "Migration status: %s\n",
|
189 | c86a6683 | Luiz Capitulino | qdict_get_str(qdict, "status"));
|
190 | c86a6683 | Luiz Capitulino | |
191 | c86a6683 | Luiz Capitulino | if (qdict_haskey(qdict, "ram")) { |
192 | c86a6683 | Luiz Capitulino | migrate_print_status(mon, "ram", qdict);
|
193 | c86a6683 | Luiz Capitulino | } |
194 | c86a6683 | Luiz Capitulino | |
195 | c86a6683 | Luiz Capitulino | if (qdict_haskey(qdict, "disk")) { |
196 | c86a6683 | Luiz Capitulino | migrate_print_status(mon, "disk", qdict);
|
197 | c86a6683 | Luiz Capitulino | } |
198 | c86a6683 | Luiz Capitulino | } |
199 | c86a6683 | Luiz Capitulino | |
200 | c86a6683 | Luiz Capitulino | static void migrate_put_status(QDict *qdict, const char *name, |
201 | c86a6683 | Luiz Capitulino | uint64_t trans, uint64_t rem, uint64_t total) |
202 | c86a6683 | Luiz Capitulino | { |
203 | c86a6683 | Luiz Capitulino | QObject *obj; |
204 | c86a6683 | Luiz Capitulino | |
205 | c86a6683 | Luiz Capitulino | obj = qobject_from_jsonf("{ 'transferred': %" PRId64 ", " |
206 | c86a6683 | Luiz Capitulino | "'remaining': %" PRId64 ", " |
207 | c86a6683 | Luiz Capitulino | "'total': %" PRId64 " }", trans, rem, total); |
208 | c86a6683 | Luiz Capitulino | assert(obj != NULL);
|
209 | c86a6683 | Luiz Capitulino | |
210 | c86a6683 | Luiz Capitulino | qdict_put_obj(qdict, name, obj); |
211 | c86a6683 | Luiz Capitulino | } |
212 | c86a6683 | Luiz Capitulino | |
213 | c86a6683 | Luiz Capitulino | /**
|
214 | c86a6683 | Luiz Capitulino | * do_info_migrate(): Migration status
|
215 | c86a6683 | Luiz Capitulino | *
|
216 | c86a6683 | Luiz Capitulino | * Return a QDict. If migration is active there will be another
|
217 | c86a6683 | Luiz Capitulino | * QDict with RAM migration status and if block migration is active
|
218 | c86a6683 | Luiz Capitulino | * another one with block migration status.
|
219 | c86a6683 | Luiz Capitulino | *
|
220 | c86a6683 | Luiz Capitulino | * The main QDict contains the following:
|
221 | c86a6683 | Luiz Capitulino | *
|
222 | c86a6683 | Luiz Capitulino | * - "status": migration status
|
223 | c86a6683 | Luiz Capitulino | * - "ram": only present if "status" is "active", it is a QDict with the
|
224 | c86a6683 | Luiz Capitulino | * following RAM information (in bytes):
|
225 | c86a6683 | Luiz Capitulino | * - "transferred": amount transferred
|
226 | c86a6683 | Luiz Capitulino | * - "remaining": amount remaining
|
227 | c86a6683 | Luiz Capitulino | * - "total": total
|
228 | c86a6683 | Luiz Capitulino | * - "disk": only present if "status" is "active" and it is a block migration,
|
229 | c86a6683 | Luiz Capitulino | * it is a QDict with the following disk information (in bytes):
|
230 | c86a6683 | Luiz Capitulino | * - "transferred": amount transferred
|
231 | c86a6683 | Luiz Capitulino | * - "remaining": amount remaining
|
232 | c86a6683 | Luiz Capitulino | * - "total": total
|
233 | c86a6683 | Luiz Capitulino | *
|
234 | c86a6683 | Luiz Capitulino | * Examples:
|
235 | c86a6683 | Luiz Capitulino | *
|
236 | c86a6683 | Luiz Capitulino | * 1. Migration is "completed":
|
237 | c86a6683 | Luiz Capitulino | *
|
238 | c86a6683 | Luiz Capitulino | * { "status": "completed" }
|
239 | c86a6683 | Luiz Capitulino | *
|
240 | c86a6683 | Luiz Capitulino | * 2. Migration is "active" and it is not a block migration:
|
241 | c86a6683 | Luiz Capitulino | *
|
242 | c86a6683 | Luiz Capitulino | * { "status": "active",
|
243 | c86a6683 | Luiz Capitulino | * "ram": { "transferred": 123, "remaining": 123, "total": 246 } }
|
244 | c86a6683 | Luiz Capitulino | *
|
245 | c86a6683 | Luiz Capitulino | * 3. Migration is "active" and it is a block migration:
|
246 | c86a6683 | Luiz Capitulino | *
|
247 | c86a6683 | Luiz Capitulino | * { "status": "active",
|
248 | c86a6683 | Luiz Capitulino | * "ram": { "total": 1057024, "remaining": 1053304, "transferred": 3720 },
|
249 | c86a6683 | Luiz Capitulino | * "disk": { "total": 20971520, "remaining": 20880384, "transferred": 91136 }}
|
250 | c86a6683 | Luiz Capitulino | */
|
251 | c86a6683 | Luiz Capitulino | void do_info_migrate(Monitor *mon, QObject **ret_data)
|
252 | c86a6683 | Luiz Capitulino | { |
253 | c86a6683 | Luiz Capitulino | QDict *qdict; |
254 | 5bb7910a | aliguori | MigrationState *s = current_migration; |
255 | 376253ec | aliguori | |
256 | 5bb7910a | aliguori | if (s) {
|
257 | ff8d81d8 | aliguori | switch (s->get_status(s)) {
|
258 | ff8d81d8 | aliguori | case MIG_STATE_ACTIVE:
|
259 | c86a6683 | Luiz Capitulino | qdict = qdict_new(); |
260 | c86a6683 | Luiz Capitulino | qdict_put(qdict, "status", qstring_from_str("active")); |
261 | c86a6683 | Luiz Capitulino | |
262 | c86a6683 | Luiz Capitulino | migrate_put_status(qdict, "ram", ram_bytes_transferred(),
|
263 | c86a6683 | Luiz Capitulino | ram_bytes_remaining(), ram_bytes_total()); |
264 | c86a6683 | Luiz Capitulino | |
265 | 25f23643 | Jan Kiszka | if (blk_mig_active()) {
|
266 | c86a6683 | Luiz Capitulino | migrate_put_status(qdict, "disk", blk_mig_bytes_transferred(),
|
267 | c86a6683 | Luiz Capitulino | blk_mig_bytes_remaining(), |
268 | c86a6683 | Luiz Capitulino | blk_mig_bytes_total()); |
269 | 25f23643 | Jan Kiszka | } |
270 | c86a6683 | Luiz Capitulino | |
271 | c86a6683 | Luiz Capitulino | *ret_data = QOBJECT(qdict); |
272 | ff8d81d8 | aliguori | break;
|
273 | ff8d81d8 | aliguori | case MIG_STATE_COMPLETED:
|
274 | c86a6683 | Luiz Capitulino | *ret_data = qobject_from_jsonf("{ 'status': 'completed' }");
|
275 | ff8d81d8 | aliguori | break;
|
276 | ff8d81d8 | aliguori | case MIG_STATE_ERROR:
|
277 | c86a6683 | Luiz Capitulino | *ret_data = qobject_from_jsonf("{ 'status': 'failed' }");
|
278 | ff8d81d8 | aliguori | break;
|
279 | ff8d81d8 | aliguori | case MIG_STATE_CANCELLED:
|
280 | c86a6683 | Luiz Capitulino | *ret_data = qobject_from_jsonf("{ 'status': 'cancelled' }");
|
281 | ff8d81d8 | aliguori | break;
|
282 | ff8d81d8 | aliguori | } |
283 | c86a6683 | Luiz Capitulino | assert(*ret_data != NULL);
|
284 | 5bb7910a | aliguori | } |
285 | 5bb7910a | aliguori | } |
286 | 5bb7910a | aliguori | |
287 | 065e2813 | aliguori | /* shared migration helpers */
|
288 | 065e2813 | aliguori | |
289 | f327aa0c | Jan Kiszka | void migrate_fd_monitor_suspend(FdMigrationState *s, Monitor *mon)
|
290 | 731b0364 | aliguori | { |
291 | f327aa0c | Jan Kiszka | s->mon = mon; |
292 | f327aa0c | Jan Kiszka | if (monitor_suspend(mon) == 0) { |
293 | cde76ee1 | aliguori | dprintf("suspending monitor\n");
|
294 | f327aa0c | Jan Kiszka | } else {
|
295 | f327aa0c | Jan Kiszka | monitor_printf(mon, "terminal does not allow synchronous "
|
296 | cde76ee1 | aliguori | "migration, continuing detached\n");
|
297 | f327aa0c | Jan Kiszka | } |
298 | 731b0364 | aliguori | } |
299 | 731b0364 | aliguori | |
300 | 065e2813 | aliguori | void migrate_fd_error(FdMigrationState *s)
|
301 | 065e2813 | aliguori | { |
302 | 065e2813 | aliguori | dprintf("setting error state\n");
|
303 | 065e2813 | aliguori | s->state = MIG_STATE_ERROR; |
304 | 065e2813 | aliguori | migrate_fd_cleanup(s); |
305 | 065e2813 | aliguori | } |
306 | 065e2813 | aliguori | |
307 | 065e2813 | aliguori | void migrate_fd_cleanup(FdMigrationState *s)
|
308 | 065e2813 | aliguori | { |
309 | 065e2813 | aliguori | qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); |
310 | 065e2813 | aliguori | |
311 | 065e2813 | aliguori | if (s->file) {
|
312 | 065e2813 | aliguori | dprintf("closing file\n");
|
313 | 065e2813 | aliguori | qemu_fclose(s->file); |
314 | 5d39c799 | Jan Kiszka | s->file = NULL;
|
315 | 065e2813 | aliguori | } |
316 | 065e2813 | aliguori | |
317 | 065e2813 | aliguori | if (s->fd != -1) |
318 | 065e2813 | aliguori | close(s->fd); |
319 | 065e2813 | aliguori | |
320 | 065e2813 | aliguori | /* Don't resume monitor until we've flushed all of the buffers */
|
321 | f327aa0c | Jan Kiszka | if (s->mon) {
|
322 | f327aa0c | Jan Kiszka | monitor_resume(s->mon); |
323 | f327aa0c | Jan Kiszka | } |
324 | 065e2813 | aliguori | |
325 | 065e2813 | aliguori | s->fd = -1;
|
326 | 065e2813 | aliguori | } |
327 | 065e2813 | aliguori | |
328 | 065e2813 | aliguori | void migrate_fd_put_notify(void *opaque) |
329 | 065e2813 | aliguori | { |
330 | 065e2813 | aliguori | FdMigrationState *s = opaque; |
331 | 065e2813 | aliguori | |
332 | 065e2813 | aliguori | qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); |
333 | 065e2813 | aliguori | qemu_file_put_notify(s->file); |
334 | 065e2813 | aliguori | } |
335 | 065e2813 | aliguori | |
336 | 065e2813 | aliguori | ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size) |
337 | 065e2813 | aliguori | { |
338 | 065e2813 | aliguori | FdMigrationState *s = opaque; |
339 | 065e2813 | aliguori | ssize_t ret; |
340 | 065e2813 | aliguori | |
341 | 065e2813 | aliguori | do {
|
342 | 065e2813 | aliguori | ret = s->write(s, data, size); |
343 | 95b134ea | Uri Lublin | } while (ret == -1 && ((s->get_error(s)) == EINTR)); |
344 | 065e2813 | aliguori | |
345 | 065e2813 | aliguori | if (ret == -1) |
346 | 065e2813 | aliguori | ret = -(s->get_error(s)); |
347 | 065e2813 | aliguori | |
348 | 065e2813 | aliguori | if (ret == -EAGAIN)
|
349 | 065e2813 | aliguori | qemu_set_fd_handler2(s->fd, NULL, NULL, migrate_fd_put_notify, s); |
350 | 065e2813 | aliguori | |
351 | 065e2813 | aliguori | return ret;
|
352 | 065e2813 | aliguori | } |
353 | 065e2813 | aliguori | |
354 | 065e2813 | aliguori | void migrate_fd_connect(FdMigrationState *s)
|
355 | 065e2813 | aliguori | { |
356 | 065e2813 | aliguori | int ret;
|
357 | 065e2813 | aliguori | |
358 | 065e2813 | aliguori | s->file = qemu_fopen_ops_buffered(s, |
359 | 065e2813 | aliguori | s->bandwidth_limit, |
360 | 065e2813 | aliguori | migrate_fd_put_buffer, |
361 | 065e2813 | aliguori | migrate_fd_put_ready, |
362 | 065e2813 | aliguori | migrate_fd_wait_for_unfreeze, |
363 | 065e2813 | aliguori | migrate_fd_close); |
364 | 065e2813 | aliguori | |
365 | 065e2813 | aliguori | dprintf("beginning savevm\n");
|
366 | f327aa0c | Jan Kiszka | ret = qemu_savevm_state_begin(s->mon, s->file, s->mig_state.blk, |
367 | c163b5ca | lirans@il.ibm.com | s->mig_state.shared); |
368 | 065e2813 | aliguori | if (ret < 0) { |
369 | 065e2813 | aliguori | dprintf("failed, %d\n", ret);
|
370 | 065e2813 | aliguori | migrate_fd_error(s); |
371 | 065e2813 | aliguori | return;
|
372 | 065e2813 | aliguori | } |
373 | c163b5ca | lirans@il.ibm.com | |
374 | 065e2813 | aliguori | migrate_fd_put_ready(s); |
375 | 065e2813 | aliguori | } |
376 | 065e2813 | aliguori | |
377 | 065e2813 | aliguori | void migrate_fd_put_ready(void *opaque) |
378 | 065e2813 | aliguori | { |
379 | 065e2813 | aliguori | FdMigrationState *s = opaque; |
380 | 065e2813 | aliguori | |
381 | 065e2813 | aliguori | if (s->state != MIG_STATE_ACTIVE) {
|
382 | 065e2813 | aliguori | dprintf("put_ready returning because of non-active state\n");
|
383 | 065e2813 | aliguori | return;
|
384 | 065e2813 | aliguori | } |
385 | 065e2813 | aliguori | |
386 | 065e2813 | aliguori | dprintf("iterate\n");
|
387 | f327aa0c | Jan Kiszka | if (qemu_savevm_state_iterate(s->mon, s->file) == 1) { |
388 | b161d123 | aliguori | int state;
|
389 | eeb34af9 | Anthony Liguori | int old_vm_running = vm_running;
|
390 | eeb34af9 | Anthony Liguori | |
391 | 065e2813 | aliguori | dprintf("done iterating\n");
|
392 | 065e2813 | aliguori | vm_stop(0);
|
393 | 065e2813 | aliguori | |
394 | 0884657b | Glauber Costa | qemu_aio_flush(); |
395 | 065e2813 | aliguori | bdrv_flush_all(); |
396 | f327aa0c | Jan Kiszka | if ((qemu_savevm_state_complete(s->mon, s->file)) < 0) { |
397 | eeb34af9 | Anthony Liguori | if (old_vm_running) {
|
398 | eeb34af9 | Anthony Liguori | vm_start(); |
399 | eeb34af9 | Anthony Liguori | } |
400 | b161d123 | aliguori | state = MIG_STATE_ERROR; |
401 | b161d123 | aliguori | } else {
|
402 | b161d123 | aliguori | state = MIG_STATE_COMPLETED; |
403 | b161d123 | aliguori | } |
404 | 065e2813 | aliguori | migrate_fd_cleanup(s); |
405 | b161d123 | aliguori | s->state = state; |
406 | 065e2813 | aliguori | } |
407 | 065e2813 | aliguori | } |
408 | 065e2813 | aliguori | |
409 | 065e2813 | aliguori | int migrate_fd_get_status(MigrationState *mig_state)
|
410 | 065e2813 | aliguori | { |
411 | 065e2813 | aliguori | FdMigrationState *s = migrate_to_fms(mig_state); |
412 | 065e2813 | aliguori | return s->state;
|
413 | 065e2813 | aliguori | } |
414 | 065e2813 | aliguori | |
415 | 065e2813 | aliguori | void migrate_fd_cancel(MigrationState *mig_state)
|
416 | 065e2813 | aliguori | { |
417 | 065e2813 | aliguori | FdMigrationState *s = migrate_to_fms(mig_state); |
418 | 065e2813 | aliguori | |
419 | 065e2813 | aliguori | if (s->state != MIG_STATE_ACTIVE)
|
420 | 065e2813 | aliguori | return;
|
421 | 065e2813 | aliguori | |
422 | 065e2813 | aliguori | dprintf("cancelling migration\n");
|
423 | 065e2813 | aliguori | |
424 | 065e2813 | aliguori | s->state = MIG_STATE_CANCELLED; |
425 | f327aa0c | Jan Kiszka | qemu_savevm_state_cancel(s->mon, s->file); |
426 | 065e2813 | aliguori | |
427 | 065e2813 | aliguori | migrate_fd_cleanup(s); |
428 | 065e2813 | aliguori | } |
429 | 065e2813 | aliguori | |
430 | 065e2813 | aliguori | void migrate_fd_release(MigrationState *mig_state)
|
431 | 065e2813 | aliguori | { |
432 | 065e2813 | aliguori | FdMigrationState *s = migrate_to_fms(mig_state); |
433 | 065e2813 | aliguori | |
434 | 065e2813 | aliguori | dprintf("releasing state\n");
|
435 | 065e2813 | aliguori | |
436 | 065e2813 | aliguori | if (s->state == MIG_STATE_ACTIVE) {
|
437 | 065e2813 | aliguori | s->state = MIG_STATE_CANCELLED; |
438 | 065e2813 | aliguori | migrate_fd_cleanup(s); |
439 | 065e2813 | aliguori | } |
440 | 065e2813 | aliguori | free(s); |
441 | 065e2813 | aliguori | } |
442 | 065e2813 | aliguori | |
443 | 065e2813 | aliguori | void migrate_fd_wait_for_unfreeze(void *opaque) |
444 | 065e2813 | aliguori | { |
445 | 065e2813 | aliguori | FdMigrationState *s = opaque; |
446 | 065e2813 | aliguori | int ret;
|
447 | 065e2813 | aliguori | |
448 | 065e2813 | aliguori | dprintf("wait for unfreeze\n");
|
449 | 065e2813 | aliguori | if (s->state != MIG_STATE_ACTIVE)
|
450 | 065e2813 | aliguori | return;
|
451 | 065e2813 | aliguori | |
452 | 065e2813 | aliguori | do {
|
453 | 065e2813 | aliguori | fd_set wfds; |
454 | 065e2813 | aliguori | |
455 | 065e2813 | aliguori | FD_ZERO(&wfds); |
456 | 065e2813 | aliguori | FD_SET(s->fd, &wfds); |
457 | 065e2813 | aliguori | |
458 | 065e2813 | aliguori | ret = select(s->fd + 1, NULL, &wfds, NULL, NULL); |
459 | 065e2813 | aliguori | } while (ret == -1 && (s->get_error(s)) == EINTR); |
460 | 065e2813 | aliguori | } |
461 | 065e2813 | aliguori | |
462 | 065e2813 | aliguori | int migrate_fd_close(void *opaque) |
463 | 065e2813 | aliguori | { |
464 | 065e2813 | aliguori | FdMigrationState *s = opaque; |
465 | e19252d3 | Uri Lublin | |
466 | e19252d3 | Uri Lublin | qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); |
467 | 065e2813 | aliguori | return s->close(s);
|
468 | 065e2813 | aliguori | } |