aliguori | 5bb7910 | 2008-10-13 03:12:02 +0000 | [diff] [blame] | 1 | /* |
| 2 | * QEMU live migration |
| 3 | * |
| 4 | * Copyright IBM, Corp. 2008 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Anthony Liguori <aliguori@us.ibm.com> |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 10 | * the COPYING file in the top-level directory. |
| 11 | * |
Paolo Bonzini | 6b620ca | 2012-01-13 17:44:23 +0100 | [diff] [blame] | 12 | * Contributions after 2012-01-13 are licensed under the terms of the |
| 13 | * GNU GPL, version 2 or (at your option) any later version. |
aliguori | 5bb7910 | 2008-10-13 03:12:02 +0000 | [diff] [blame] | 14 | */ |
| 15 | |
Peter Maydell | 1393a48 | 2016-01-26 18:16:54 +0000 | [diff] [blame] | 16 | #include "qemu/osdep.h" |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 17 | #include "qemu/cutils.h" |
Markus Armbruster | d49b683 | 2015-03-17 18:29:20 +0100 | [diff] [blame] | 18 | #include "qemu/error-report.h" |
Markus Armbruster | db72581 | 2019-08-12 07:23:50 +0200 | [diff] [blame] | 19 | #include "qemu/main-loop.h" |
Juan Quintela | 795c40b | 2017-04-06 12:00:28 +0200 | [diff] [blame] | 20 | #include "migration/blocker.h" |
Juan Quintela | f4dbe1b | 2017-04-05 15:54:10 +0200 | [diff] [blame] | 21 | #include "exec.h" |
Juan Quintela | 7fcac4a | 2017-04-05 15:58:29 +0200 | [diff] [blame] | 22 | #include "fd.h" |
Juan Quintela | 61e8b14 | 2017-04-05 17:40:11 +0200 | [diff] [blame] | 23 | #include "socket.h" |
Markus Armbruster | 54d3123 | 2019-08-12 07:23:59 +0200 | [diff] [blame] | 24 | #include "sysemu/runstate.h" |
Markus Armbruster | 46517dd | 2019-08-12 07:23:57 +0200 | [diff] [blame] | 25 | #include "sysemu/sysemu.h" |
Claudio Fontana | b0c3cf9 | 2020-06-29 11:35:03 +0200 | [diff] [blame] | 26 | #include "sysemu/cpu-throttle.h" |
Juan Quintela | e1a3ece | 2017-04-17 20:32:36 +0200 | [diff] [blame] | 27 | #include "rdma.h" |
Juan Quintela | 7b1e1a2 | 2017-04-17 20:26:27 +0200 | [diff] [blame] | 28 | #include "ram.h" |
Juan Quintela | 84a899d | 2017-04-24 18:53:30 +0200 | [diff] [blame] | 29 | #include "migration/global_state.h" |
Juan Quintela | c4b63b7 | 2017-04-24 19:02:44 +0200 | [diff] [blame] | 30 | #include "migration/misc.h" |
Juan Quintela | 6666c96 | 2017-04-24 20:07:27 +0200 | [diff] [blame] | 31 | #include "migration.h" |
Juan Quintela | 20a519a | 2017-04-20 14:48:46 +0200 | [diff] [blame] | 32 | #include "savevm.h" |
Juan Quintela | 40014d8 | 2017-04-17 19:34:36 +0200 | [diff] [blame] | 33 | #include "qemu-file-channel.h" |
Juan Quintela | 08a0aee | 2017-04-20 18:52:18 +0200 | [diff] [blame] | 34 | #include "qemu-file.h" |
Juan Quintela | 987772d | 2017-04-17 19:02:59 +0200 | [diff] [blame] | 35 | #include "migration/vmstate.h" |
Paolo Bonzini | 737e150 | 2012-12-17 18:19:44 +0100 | [diff] [blame] | 36 | #include "block/block.h" |
Markus Armbruster | e688df6 | 2018-02-01 12:18:31 +0100 | [diff] [blame] | 37 | #include "qapi/error.h" |
Juan Quintela | 9aca82b | 2019-02-27 11:51:27 +0100 | [diff] [blame] | 38 | #include "qapi/clone-visitor.h" |
Max Reitz | 31e4c35 | 2020-08-20 17:07:23 +0200 | [diff] [blame] | 39 | #include "qapi/qapi-visit-migration.h" |
Juan Quintela | 9aca82b | 2019-02-27 11:51:27 +0100 | [diff] [blame] | 40 | #include "qapi/qapi-visit-sockets.h" |
Markus Armbruster | 9af2398 | 2018-02-11 10:36:01 +0100 | [diff] [blame] | 41 | #include "qapi/qapi-commands-migration.h" |
| 42 | #include "qapi/qapi-events-migration.h" |
Markus Armbruster | cc7a8ea | 2015-03-17 17:22:46 +0100 | [diff] [blame] | 43 | #include "qapi/qmp/qerror.h" |
Markus Armbruster | 15280c3 | 2018-02-01 12:18:36 +0100 | [diff] [blame] | 44 | #include "qapi/qmp/qnull.h" |
Paolo Bonzini | ab28bd2 | 2015-07-09 08:55:38 +0200 | [diff] [blame] | 45 | #include "qemu/rcu.h" |
Juan Quintela | 2c9e6fe | 2017-04-21 14:31:22 +0200 | [diff] [blame] | 46 | #include "block.h" |
Juan Quintela | be07b0a | 2017-04-20 13:12:24 +0200 | [diff] [blame] | 47 | #include "postcopy-ram.h" |
Juan Quintela | 766bd17 | 2012-07-23 05:45:29 +0200 | [diff] [blame] | 48 | #include "qemu/thread.h" |
Kazuya Saito | c09e5bb | 2013-02-22 17:36:19 +0100 | [diff] [blame] | 49 | #include "trace.h" |
Juan Quintela | 5118042 | 2017-04-24 20:50:19 +0200 | [diff] [blame] | 50 | #include "exec/target_page.h" |
Daniel P. Berrange | 61b67d4 | 2016-04-27 11:05:01 +0100 | [diff] [blame] | 51 | #include "io/channel-buffer.h" |
zhanghailiang | 35a6ed4 | 2016-10-27 14:42:52 +0800 | [diff] [blame] | 52 | #include "migration/colo.h" |
Peter Xu | 4ffdb33 | 2017-06-27 12:10:18 +0800 | [diff] [blame] | 53 | #include "hw/boards.h" |
Markus Armbruster | a27bd6c | 2019-08-12 07:23:51 +0200 | [diff] [blame] | 54 | #include "hw/qdev-properties.h" |
Eduardo Habkost | ce35e22 | 2020-12-11 17:05:12 -0500 | [diff] [blame] | 55 | #include "hw/qdev-properties-system.h" |
Peter Xu | 9d18af9 | 2017-06-27 12:10:19 +0800 | [diff] [blame] | 56 | #include "monitor/monitor.h" |
Dr. David Alan Gilbert | 50510ea | 2019-02-27 13:24:05 +0000 | [diff] [blame] | 57 | #include "net/announce.h" |
Jens Freimann | c7e0acd | 2019-10-29 12:49:02 +0100 | [diff] [blame] | 58 | #include "qemu/queue.h" |
Juan Quintela | d32ca5a | 2020-01-22 16:16:07 +0100 | [diff] [blame] | 59 | #include "multifd.h" |
Lukas Straub | b5eea99 | 2020-12-28 16:08:52 +0100 | [diff] [blame] | 60 | #include "qemu/yank.h" |
Andrey Gruzdev | 6e8c25b | 2021-01-29 13:14:03 +0300 | [diff] [blame] | 61 | #include "sysemu/cpus.h" |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 62 | |
Laurent Vivier | 7590a2a | 2020-09-21 16:49:57 +0200 | [diff] [blame] | 63 | #define MAX_THROTTLE (128 << 20) /* Migration transfer speed throttling */ |
aliguori | 5bb7910 | 2008-10-13 03:12:02 +0000 | [diff] [blame] | 64 | |
Juan Quintela | 5b4e1eb | 2012-12-19 10:40:48 +0100 | [diff] [blame] | 65 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
| 66 | * data. */ |
| 67 | #define BUFFER_DELAY 100 |
| 68 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) |
| 69 | |
Ashijeet Acharya | 2ff3025 | 2016-09-15 21:50:28 +0530 | [diff] [blame] | 70 | /* Time in milliseconds we are allowed to stop the source, |
| 71 | * for sending the last part */ |
| 72 | #define DEFAULT_MIGRATE_SET_DOWNTIME 300 |
| 73 | |
Daniel Henrique Barboza | 87c9cc1 | 2017-02-22 12:17:29 -0300 | [diff] [blame] | 74 | /* Maximum migrate downtime set to 2000 seconds */ |
| 75 | #define MAX_MIGRATE_DOWNTIME_SECONDS 2000 |
| 76 | #define MAX_MIGRATE_DOWNTIME (MAX_MIGRATE_DOWNTIME_SECONDS * 1000) |
| 77 | |
Liang Li | 8706d2d | 2015-03-23 16:32:17 +0800 | [diff] [blame] | 78 | /* Default compression thread count */ |
| 79 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 |
Liang Li | 3fcb38c | 2015-03-23 16:32:18 +0800 | [diff] [blame] | 80 | /* Default decompression thread count, usually decompression is at |
| 81 | * least 4 times as fast as compression.*/ |
| 82 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 |
Liang Li | 8706d2d | 2015-03-23 16:32:17 +0800 | [diff] [blame] | 83 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
| 84 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 |
Jason J. Herne | 1626fee | 2015-09-08 13:12:34 -0400 | [diff] [blame] | 85 | /* Define default autoconverge cpu throttle migration parameters */ |
Keqian Zhu | dc14a47 | 2020-02-24 10:31:42 +0800 | [diff] [blame] | 86 | #define DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD 50 |
Jason J. Herne | d85a31d | 2016-04-21 14:07:18 -0400 | [diff] [blame] | 87 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL 20 |
| 88 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT 10 |
Li Qiang | 4cbc9c7 | 2018-08-01 06:00:20 -0700 | [diff] [blame] | 89 | #define DEFAULT_MIGRATE_MAX_CPU_THROTTLE 99 |
Liang Li | 8706d2d | 2015-03-23 16:32:17 +0800 | [diff] [blame] | 90 | |
Orit Wasserman | 17ad9b3 | 2012-08-06 21:42:53 +0300 | [diff] [blame] | 91 | /* Migration XBZRLE default cache size */ |
Juan Quintela | 73af8dd | 2017-10-05 21:30:10 +0200 | [diff] [blame] | 92 | #define DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE (64 * 1024 * 1024) |
Orit Wasserman | 17ad9b3 | 2012-08-06 21:42:53 +0300 | [diff] [blame] | 93 | |
Zhang Chen | 131b215 | 2018-09-03 12:38:45 +0800 | [diff] [blame] | 94 | /* The delay time (in ms) between two COLO checkpoints */ |
| 95 | #define DEFAULT_MIGRATE_X_CHECKPOINT_DELAY (200 * 100) |
Juan Quintela | 4075fb1 | 2016-01-15 08:56:17 +0100 | [diff] [blame] | 96 | #define DEFAULT_MIGRATE_MULTIFD_CHANNELS 2 |
Juan Quintela | 96eef04 | 2019-01-16 10:35:55 +0100 | [diff] [blame] | 97 | #define DEFAULT_MIGRATE_MULTIFD_COMPRESSION MULTIFD_COMPRESSION_NONE |
Juan Quintela | 9004db4 | 2020-01-23 17:08:52 +0100 | [diff] [blame] | 98 | /* 0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
| 99 | #define DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL 1 |
Juan Quintela | 6a9ad15 | 2020-01-23 17:41:36 +0100 | [diff] [blame] | 100 | /* 0: means nocompress, 1: best speed, ... 20: best compress ratio */ |
| 101 | #define DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL 1 |
zhanghailiang | 68b5359 | 2016-10-27 14:43:01 +0800 | [diff] [blame] | 102 | |
Dr. David Alan Gilbert | 7e555c6 | 2018-06-13 11:26:40 +0100 | [diff] [blame] | 103 | /* Background transfer rate for postcopy, 0 means unlimited, note |
| 104 | * that page requests can still exceed this limit. |
| 105 | */ |
| 106 | #define DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH 0 |
| 107 | |
Dr. David Alan Gilbert | ee3d96b | 2019-02-27 13:24:06 +0000 | [diff] [blame] | 108 | /* |
| 109 | * Parameters for self_announce_delay giving a stream of RARP/ARP |
| 110 | * packets after migration. |
| 111 | */ |
| 112 | #define DEFAULT_MIGRATE_ANNOUNCE_INITIAL 50 |
| 113 | #define DEFAULT_MIGRATE_ANNOUNCE_MAX 550 |
| 114 | #define DEFAULT_MIGRATE_ANNOUNCE_ROUNDS 5 |
| 115 | #define DEFAULT_MIGRATE_ANNOUNCE_STEP 100 |
| 116 | |
Gerd Hoffmann | 99a0db9 | 2010-12-13 17:30:12 +0100 | [diff] [blame] | 117 | static NotifierList migration_state_notifiers = |
| 118 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); |
| 119 | |
Juan Quintela | da6f179 | 2017-04-24 17:37:14 +0200 | [diff] [blame] | 120 | /* Messages sent on the return path from destination to source */ |
| 121 | enum mig_rp_message_type { |
| 122 | MIG_RP_MSG_INVALID = 0, /* Must be 0 */ |
| 123 | MIG_RP_MSG_SHUT, /* sibling will not send any more RP messages */ |
| 124 | MIG_RP_MSG_PONG, /* Response to a PING; data (seq: be32 ) */ |
| 125 | |
| 126 | MIG_RP_MSG_REQ_PAGES_ID, /* data (start: be64, len: be32, id: string) */ |
| 127 | MIG_RP_MSG_REQ_PAGES, /* data (start: be64, len: be32) */ |
Peter Xu | a335deb | 2018-05-02 18:47:28 +0800 | [diff] [blame] | 128 | MIG_RP_MSG_RECV_BITMAP, /* send recved_bitmap back to source */ |
Peter Xu | 13955b8 | 2018-05-02 18:47:30 +0800 | [diff] [blame] | 129 | MIG_RP_MSG_RESUME_ACK, /* tell source that we are ready to resume */ |
Juan Quintela | da6f179 | 2017-04-24 17:37:14 +0200 | [diff] [blame] | 130 | |
| 131 | MIG_RP_MSG_MAX |
| 132 | }; |
| 133 | |
Andrey Gruzdev | 6e8c25b | 2021-01-29 13:14:03 +0300 | [diff] [blame] | 134 | /* Migration capabilities set */ |
| 135 | struct MigrateCapsSet { |
| 136 | int size; /* Capability set size */ |
| 137 | MigrationCapability caps[]; /* Variadic array of capabilities */ |
| 138 | }; |
| 139 | typedef struct MigrateCapsSet MigrateCapsSet; |
| 140 | |
| 141 | /* Define and initialize MigrateCapsSet */ |
| 142 | #define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \ |
| 143 | MigrateCapsSet _name = { \ |
| 144 | .size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \ |
| 145 | .caps = { __VA_ARGS__ } \ |
| 146 | } |
| 147 | |
| 148 | /* Background-snapshot compatibility check list */ |
| 149 | static const |
| 150 | INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot, |
| 151 | MIGRATION_CAPABILITY_POSTCOPY_RAM, |
| 152 | MIGRATION_CAPABILITY_DIRTY_BITMAPS, |
| 153 | MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME, |
| 154 | MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE, |
| 155 | MIGRATION_CAPABILITY_RETURN_PATH, |
| 156 | MIGRATION_CAPABILITY_MULTIFD, |
| 157 | MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER, |
| 158 | MIGRATION_CAPABILITY_AUTO_CONVERGE, |
| 159 | MIGRATION_CAPABILITY_RELEASE_RAM, |
| 160 | MIGRATION_CAPABILITY_RDMA_PIN_ALL, |
| 161 | MIGRATION_CAPABILITY_COMPRESS, |
| 162 | MIGRATION_CAPABILITY_XBZRLE, |
| 163 | MIGRATION_CAPABILITY_X_COLO, |
| 164 | MIGRATION_CAPABILITY_VALIDATE_UUID); |
| 165 | |
Juan Quintela | 17549e8 | 2011-10-05 13:50:43 +0200 | [diff] [blame] | 166 | /* When we add fault tolerance, we could have several |
| 167 | migrations at once. For now we don't need to add |
| 168 | dynamic creation of migration */ |
| 169 | |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 170 | static MigrationState *current_migration; |
Peter Xu | e1b1b1b | 2018-05-02 18:47:35 +0800 | [diff] [blame] | 171 | static MigrationIncomingState *current_incoming; |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 172 | |
Dr. David Alan Gilbert | 3af8554 | 2021-02-02 13:55:21 +0000 | [diff] [blame] | 173 | static GSList *migration_blockers; |
| 174 | |
Peter Xu | 8b0b29d | 2017-07-18 11:39:06 +0800 | [diff] [blame] | 175 | static bool migration_object_check(MigrationState *ms, Error **errp); |
Dr. David Alan Gilbert | 0331c8c | 2017-10-20 10:05:56 +0100 | [diff] [blame] | 176 | static int migration_maybe_pause(MigrationState *s, |
| 177 | int *current_active_state, |
| 178 | int new_state); |
Dr. David Alan Gilbert | 892ae71 | 2019-02-27 16:49:00 +0000 | [diff] [blame] | 179 | static void migrate_fd_cancel(MigrationState *s); |
Peter Xu | 8b0b29d | 2017-07-18 11:39:06 +0800 | [diff] [blame] | 180 | |
Peter Xu | 8f8bfff | 2020-10-21 17:27:18 -0400 | [diff] [blame] | 181 | static gint page_request_addr_cmp(gconstpointer ap, gconstpointer bp) |
| 182 | { |
| 183 | uintptr_t a = (uintptr_t) ap, b = (uintptr_t) bp; |
| 184 | |
| 185 | return (a > b) - (a < b); |
| 186 | } |
| 187 | |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 188 | void migration_object_init(void) |
| 189 | { |
Peter Xu | 8b0b29d | 2017-07-18 11:39:06 +0800 | [diff] [blame] | 190 | Error *err = NULL; |
Peter Xu | 4ffdb33 | 2017-06-27 12:10:18 +0800 | [diff] [blame] | 191 | |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 192 | /* This can only be called once. */ |
| 193 | assert(!current_migration); |
| 194 | current_migration = MIGRATION_OBJ(object_new(TYPE_MIGRATION)); |
Peter Xu | 4ffdb33 | 2017-06-27 12:10:18 +0800 | [diff] [blame] | 195 | |
Peter Xu | e1b1b1b | 2018-05-02 18:47:35 +0800 | [diff] [blame] | 196 | /* |
| 197 | * Init the migrate incoming object as well no matter whether |
| 198 | * we'll use it or not. |
| 199 | */ |
| 200 | assert(!current_incoming); |
| 201 | current_incoming = g_new0(MigrationIncomingState, 1); |
| 202 | current_incoming->state = MIGRATION_STATUS_NONE; |
| 203 | current_incoming->postcopy_remote_fds = |
| 204 | g_array_new(FALSE, TRUE, sizeof(struct PostCopyFD)); |
| 205 | qemu_mutex_init(¤t_incoming->rp_mutex); |
| 206 | qemu_event_init(¤t_incoming->main_thread_load_event, false); |
| 207 | qemu_sem_init(¤t_incoming->postcopy_pause_sem_dst, 0); |
| 208 | qemu_sem_init(¤t_incoming->postcopy_pause_sem_fault, 0); |
Peter Xu | 8f8bfff | 2020-10-21 17:27:18 -0400 | [diff] [blame] | 209 | qemu_mutex_init(¤t_incoming->page_request_mutex); |
| 210 | current_incoming->page_requested = g_tree_new(page_request_addr_cmp); |
Peter Xu | e1b1b1b | 2018-05-02 18:47:35 +0800 | [diff] [blame] | 211 | |
Peter Xu | 8b0b29d | 2017-07-18 11:39:06 +0800 | [diff] [blame] | 212 | if (!migration_object_check(current_migration, &err)) { |
| 213 | error_report_err(err); |
| 214 | exit(1); |
| 215 | } |
Paolo Bonzini | e0d17df | 2020-10-21 05:25:58 -0400 | [diff] [blame] | 216 | |
| 217 | blk_mig_init(); |
| 218 | ram_mig_init(); |
| 219 | dirty_bitmap_mig_init(); |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 220 | } |
| 221 | |
David Hildenbrand | c7c0e72 | 2021-04-29 13:27:02 +0200 | [diff] [blame] | 222 | void migration_cancel(void) |
| 223 | { |
| 224 | migrate_fd_cancel(current_migration); |
| 225 | } |
| 226 | |
Dr. David Alan Gilbert | 892ae71 | 2019-02-27 16:49:00 +0000 | [diff] [blame] | 227 | void migration_shutdown(void) |
Vladimir Sementsov-Ogievskiy | 1f89560 | 2017-12-28 12:16:16 +0300 | [diff] [blame] | 228 | { |
Dr. David Alan Gilbert | 892ae71 | 2019-02-27 16:49:00 +0000 | [diff] [blame] | 229 | /* |
| 230 | * Cancel the current migration - that will (eventually) |
| 231 | * stop the migration using this structure |
| 232 | */ |
David Hildenbrand | c7c0e72 | 2021-04-29 13:27:02 +0200 | [diff] [blame] | 233 | migration_cancel(); |
Vladimir Sementsov-Ogievskiy | 1f89560 | 2017-12-28 12:16:16 +0300 | [diff] [blame] | 234 | object_unref(OBJECT(current_migration)); |
Vladimir Sementsov-Ogievskiy | 1499ab0 | 2020-07-27 22:42:31 +0300 | [diff] [blame] | 235 | |
| 236 | /* |
| 237 | * Cancel outgoing migration of dirty bitmaps. It should |
| 238 | * at least unref used block nodes. |
| 239 | */ |
| 240 | dirty_bitmap_mig_cancel_outgoing(); |
| 241 | |
| 242 | /* |
| 243 | * Cancel incoming migration of dirty bitmaps. Dirty bitmaps |
| 244 | * are non-critical data, and their loss never considered as |
| 245 | * something serious. |
| 246 | */ |
| 247 | dirty_bitmap_mig_cancel_incoming(); |
Vladimir Sementsov-Ogievskiy | 1f89560 | 2017-12-28 12:16:16 +0300 | [diff] [blame] | 248 | } |
| 249 | |
Dr. David Alan Gilbert | bca7856 | 2015-05-21 13:24:14 +0100 | [diff] [blame] | 250 | /* For outgoing */ |
Juan Quintela | 859bc75 | 2012-08-13 09:42:49 +0200 | [diff] [blame] | 251 | MigrationState *migrate_get_current(void) |
Juan Quintela | 17549e8 | 2011-10-05 13:50:43 +0200 | [diff] [blame] | 252 | { |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 253 | /* This can only be called after the object created. */ |
| 254 | assert(current_migration); |
| 255 | return current_migration; |
Juan Quintela | 17549e8 | 2011-10-05 13:50:43 +0200 | [diff] [blame] | 256 | } |
| 257 | |
Dr. David Alan Gilbert | bca7856 | 2015-05-21 13:24:14 +0100 | [diff] [blame] | 258 | MigrationIncomingState *migration_incoming_get_current(void) |
| 259 | { |
Peter Xu | e1b1b1b | 2018-05-02 18:47:35 +0800 | [diff] [blame] | 260 | assert(current_incoming); |
| 261 | return current_incoming; |
Dr. David Alan Gilbert | bca7856 | 2015-05-21 13:24:14 +0100 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | void migration_incoming_state_destroy(void) |
| 265 | { |
Juan Quintela | b4b076d | 2017-01-23 22:32:06 +0100 | [diff] [blame] | 266 | struct MigrationIncomingState *mis = migration_incoming_get_current(); |
| 267 | |
Peter Xu | 3482655 | 2017-05-19 14:43:29 +0800 | [diff] [blame] | 268 | if (mis->to_src_file) { |
Peter Xu | 660819b | 2017-05-19 14:43:30 +0800 | [diff] [blame] | 269 | /* Tell source that we are done */ |
| 270 | migrate_send_rp_shut(mis, qemu_file_get_error(mis->from_src_file) != 0); |
Peter Xu | 3482655 | 2017-05-19 14:43:29 +0800 | [diff] [blame] | 271 | qemu_fclose(mis->to_src_file); |
| 272 | mis->to_src_file = NULL; |
| 273 | } |
| 274 | |
Peter Xu | 660819b | 2017-05-19 14:43:30 +0800 | [diff] [blame] | 275 | if (mis->from_src_file) { |
| 276 | qemu_fclose(mis->from_src_file); |
| 277 | mis->from_src_file = NULL; |
| 278 | } |
Dr. David Alan Gilbert | 00fa4fc | 2018-03-12 17:21:04 +0000 | [diff] [blame] | 279 | if (mis->postcopy_remote_fds) { |
| 280 | g_array_free(mis->postcopy_remote_fds, TRUE); |
| 281 | mis->postcopy_remote_fds = NULL; |
| 282 | } |
Dr. David Alan Gilbert | 1df6ddb | 2021-04-21 12:28:32 +0100 | [diff] [blame] | 283 | if (mis->transport_cleanup) { |
| 284 | mis->transport_cleanup(mis->transport_data); |
| 285 | } |
Peter Xu | 660819b | 2017-05-19 14:43:30 +0800 | [diff] [blame] | 286 | |
Dr. David Alan Gilbert | 1783c00 | 2020-09-28 15:48:30 +0100 | [diff] [blame] | 287 | qemu_event_reset(&mis->main_thread_load_event); |
| 288 | |
Peter Xu | 8f8bfff | 2020-10-21 17:27:18 -0400 | [diff] [blame] | 289 | if (mis->page_requested) { |
| 290 | g_tree_destroy(mis->page_requested); |
| 291 | mis->page_requested = NULL; |
| 292 | } |
| 293 | |
Juan Quintela | 9aca82b | 2019-02-27 11:51:27 +0100 | [diff] [blame] | 294 | if (mis->socket_address_list) { |
| 295 | qapi_free_SocketAddressList(mis->socket_address_list); |
| 296 | mis->socket_address_list = NULL; |
| 297 | } |
Lukas Straub | b5eea99 | 2020-12-28 16:08:52 +0100 | [diff] [blame] | 298 | |
| 299 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); |
Dr. David Alan Gilbert | bca7856 | 2015-05-21 13:24:14 +0100 | [diff] [blame] | 300 | } |
| 301 | |
Juan Quintela | b05dc72 | 2015-07-07 14:44:05 +0200 | [diff] [blame] | 302 | static void migrate_generate_event(int new_state) |
| 303 | { |
| 304 | if (migrate_use_events()) { |
Peter Xu | 3ab7238 | 2018-08-15 21:37:37 +0800 | [diff] [blame] | 305 | qapi_event_send_migration(new_state); |
Juan Quintela | b05dc72 | 2015-07-07 14:44:05 +0200 | [diff] [blame] | 306 | } |
| 307 | } |
| 308 | |
Dr. David Alan Gilbert | 0f073f4 | 2018-04-16 18:09:30 +0100 | [diff] [blame] | 309 | static bool migrate_late_block_activate(void) |
| 310 | { |
| 311 | MigrationState *s; |
| 312 | |
| 313 | s = migrate_get_current(); |
| 314 | |
| 315 | return s->enabled_capabilities[ |
| 316 | MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE]; |
| 317 | } |
| 318 | |
Dr. David Alan Gilbert | adde220 | 2015-02-19 11:40:27 +0000 | [diff] [blame] | 319 | /* |
Juan Quintela | da6f179 | 2017-04-24 17:37:14 +0200 | [diff] [blame] | 320 | * Send a message on the return channel back to the source |
| 321 | * of the migration. |
| 322 | */ |
Peter Xu | d6208e3 | 2018-02-08 18:31:12 +0800 | [diff] [blame] | 323 | static int migrate_send_rp_message(MigrationIncomingState *mis, |
| 324 | enum mig_rp_message_type message_type, |
| 325 | uint16_t len, void *data) |
Juan Quintela | da6f179 | 2017-04-24 17:37:14 +0200 | [diff] [blame] | 326 | { |
Peter Xu | d6208e3 | 2018-02-08 18:31:12 +0800 | [diff] [blame] | 327 | int ret = 0; |
| 328 | |
Juan Quintela | da6f179 | 2017-04-24 17:37:14 +0200 | [diff] [blame] | 329 | trace_migrate_send_rp_message((int)message_type, len); |
Mahmoud Mandour | 3739695 | 2021-03-11 05:15:35 +0200 | [diff] [blame] | 330 | QEMU_LOCK_GUARD(&mis->rp_mutex); |
Peter Xu | d6208e3 | 2018-02-08 18:31:12 +0800 | [diff] [blame] | 331 | |
| 332 | /* |
| 333 | * It's possible that the file handle got lost due to network |
| 334 | * failures. |
| 335 | */ |
| 336 | if (!mis->to_src_file) { |
| 337 | ret = -EIO; |
Mahmoud Mandour | 3739695 | 2021-03-11 05:15:35 +0200 | [diff] [blame] | 338 | return ret; |
Peter Xu | d6208e3 | 2018-02-08 18:31:12 +0800 | [diff] [blame] | 339 | } |
| 340 | |
Juan Quintela | da6f179 | 2017-04-24 17:37:14 +0200 | [diff] [blame] | 341 | qemu_put_be16(mis->to_src_file, (unsigned int)message_type); |
| 342 | qemu_put_be16(mis->to_src_file, len); |
| 343 | qemu_put_buffer(mis->to_src_file, data, len); |
| 344 | qemu_fflush(mis->to_src_file); |
Peter Xu | d6208e3 | 2018-02-08 18:31:12 +0800 | [diff] [blame] | 345 | |
| 346 | /* It's possible that qemu file got error during sending */ |
| 347 | ret = qemu_file_get_error(mis->to_src_file); |
| 348 | |
Peter Xu | d6208e3 | 2018-02-08 18:31:12 +0800 | [diff] [blame] | 349 | return ret; |
Juan Quintela | da6f179 | 2017-04-24 17:37:14 +0200 | [diff] [blame] | 350 | } |
| 351 | |
Peter Xu | 2e2bce1 | 2020-09-08 16:30:18 -0400 | [diff] [blame] | 352 | /* Request one page from the source VM at the given start address. |
| 353 | * rb: the RAMBlock to request the page in |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 354 | * Start: Address offset within the RB |
| 355 | * Len: Length in bytes required - must be a multiple of pagesize |
| 356 | */ |
Peter Xu | 7a267fc | 2020-10-21 17:27:17 -0400 | [diff] [blame] | 357 | int migrate_send_rp_message_req_pages(MigrationIncomingState *mis, |
| 358 | RAMBlock *rb, ram_addr_t start) |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 359 | { |
Stefan Weil | cb8d4c8 | 2016-03-23 15:59:57 +0100 | [diff] [blame] | 360 | uint8_t bufc[12 + 1 + 255]; /* start (8), len (4), rbname up to 256 */ |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 361 | size_t msglen = 12; /* start + len */ |
Peter Xu | 2e2bce1 | 2020-09-08 16:30:18 -0400 | [diff] [blame] | 362 | size_t len = qemu_ram_pagesize(rb); |
Peter Xu | d6208e3 | 2018-02-08 18:31:12 +0800 | [diff] [blame] | 363 | enum mig_rp_message_type msg_type; |
Peter Xu | 2e2bce1 | 2020-09-08 16:30:18 -0400 | [diff] [blame] | 364 | const char *rbname; |
| 365 | int rbname_len; |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 366 | |
| 367 | *(uint64_t *)bufc = cpu_to_be64((uint64_t)start); |
| 368 | *(uint32_t *)(bufc + 8) = cpu_to_be32((uint32_t)len); |
| 369 | |
Peter Xu | 2e2bce1 | 2020-09-08 16:30:18 -0400 | [diff] [blame] | 370 | /* |
| 371 | * We maintain the last ramblock that we requested for page. Note that we |
| 372 | * don't need locking because this function will only be called within the |
| 373 | * postcopy ram fault thread. |
| 374 | */ |
| 375 | if (rb != mis->last_rb) { |
| 376 | mis->last_rb = rb; |
| 377 | |
| 378 | rbname = qemu_ram_get_idstr(rb); |
| 379 | rbname_len = strlen(rbname); |
| 380 | |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 381 | assert(rbname_len < 256); |
| 382 | |
| 383 | bufc[msglen++] = rbname_len; |
| 384 | memcpy(bufc + msglen, rbname, rbname_len); |
| 385 | msglen += rbname_len; |
Peter Xu | d6208e3 | 2018-02-08 18:31:12 +0800 | [diff] [blame] | 386 | msg_type = MIG_RP_MSG_REQ_PAGES_ID; |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 387 | } else { |
Peter Xu | d6208e3 | 2018-02-08 18:31:12 +0800 | [diff] [blame] | 388 | msg_type = MIG_RP_MSG_REQ_PAGES; |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 389 | } |
Peter Xu | d6208e3 | 2018-02-08 18:31:12 +0800 | [diff] [blame] | 390 | |
| 391 | return migrate_send_rp_message(mis, msg_type, msglen, bufc); |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 392 | } |
| 393 | |
Peter Xu | 7a267fc | 2020-10-21 17:27:17 -0400 | [diff] [blame] | 394 | int migrate_send_rp_req_pages(MigrationIncomingState *mis, |
Peter Xu | 8f8bfff | 2020-10-21 17:27:18 -0400 | [diff] [blame] | 395 | RAMBlock *rb, ram_addr_t start, uint64_t haddr) |
Peter Xu | 7a267fc | 2020-10-21 17:27:17 -0400 | [diff] [blame] | 396 | { |
Peter Xu | 8f8bfff | 2020-10-21 17:27:18 -0400 | [diff] [blame] | 397 | void *aligned = (void *)(uintptr_t)(haddr & (-qemu_ram_pagesize(rb))); |
Chen Qun | a242928 | 2020-11-11 22:22:03 +0800 | [diff] [blame] | 398 | bool received = false; |
Peter Xu | 8f8bfff | 2020-10-21 17:27:18 -0400 | [diff] [blame] | 399 | |
| 400 | WITH_QEMU_LOCK_GUARD(&mis->page_request_mutex) { |
| 401 | received = ramblock_recv_bitmap_test_byte_offset(rb, start); |
| 402 | if (!received && !g_tree_lookup(mis->page_requested, aligned)) { |
| 403 | /* |
| 404 | * The page has not been received, and it's not yet in the page |
| 405 | * request list. Queue it. Set the value of element to 1, so that |
| 406 | * things like g_tree_lookup() will return TRUE (1) when found. |
| 407 | */ |
| 408 | g_tree_insert(mis->page_requested, aligned, (gpointer)1); |
| 409 | mis->page_requested_count++; |
| 410 | trace_postcopy_page_req_add(aligned, mis->page_requested_count); |
| 411 | } |
| 412 | } |
| 413 | |
| 414 | /* |
| 415 | * If the page is there, skip sending the message. We don't even need the |
| 416 | * lock because as long as the page arrived, it'll be there forever. |
| 417 | */ |
| 418 | if (received) { |
| 419 | return 0; |
| 420 | } |
| 421 | |
Peter Xu | 7a267fc | 2020-10-21 17:27:17 -0400 | [diff] [blame] | 422 | return migrate_send_rp_message_req_pages(mis, rb, start); |
| 423 | } |
| 424 | |
Zhang Chen | aad555c | 2018-09-03 12:38:47 +0800 | [diff] [blame] | 425 | static bool migration_colo_enabled; |
| 426 | bool migration_incoming_colo_enabled(void) |
| 427 | { |
| 428 | return migration_colo_enabled; |
| 429 | } |
| 430 | |
| 431 | void migration_incoming_disable_colo(void) |
| 432 | { |
David Hildenbrand | 18b1d3c | 2020-06-26 09:22:36 +0200 | [diff] [blame] | 433 | ram_block_discard_disable(false); |
Zhang Chen | aad555c | 2018-09-03 12:38:47 +0800 | [diff] [blame] | 434 | migration_colo_enabled = false; |
| 435 | } |
| 436 | |
David Hildenbrand | 18b1d3c | 2020-06-26 09:22:36 +0200 | [diff] [blame] | 437 | int migration_incoming_enable_colo(void) |
Zhang Chen | aad555c | 2018-09-03 12:38:47 +0800 | [diff] [blame] | 438 | { |
David Hildenbrand | 18b1d3c | 2020-06-26 09:22:36 +0200 | [diff] [blame] | 439 | if (ram_block_discard_disable(true)) { |
| 440 | error_report("COLO: cannot disable RAM discard"); |
| 441 | return -EBUSY; |
| 442 | } |
Zhang Chen | aad555c | 2018-09-03 12:38:47 +0800 | [diff] [blame] | 443 | migration_colo_enabled = true; |
David Hildenbrand | 18b1d3c | 2020-06-26 09:22:36 +0200 | [diff] [blame] | 444 | return 0; |
Zhang Chen | aad555c | 2018-09-03 12:38:47 +0800 | [diff] [blame] | 445 | } |
| 446 | |
Juan Quintela | 9aca82b | 2019-02-27 11:51:27 +0100 | [diff] [blame] | 447 | void migrate_add_address(SocketAddress *address) |
| 448 | { |
| 449 | MigrationIncomingState *mis = migration_incoming_get_current(); |
Juan Quintela | 9aca82b | 2019-02-27 11:51:27 +0100 | [diff] [blame] | 450 | |
Eric Blake | 54aa3de | 2020-11-12 19:13:37 -0600 | [diff] [blame] | 451 | QAPI_LIST_PREPEND(mis->socket_address_list, |
| 452 | QAPI_CLONE(SocketAddress, address)); |
Juan Quintela | 9aca82b | 2019-02-27 11:51:27 +0100 | [diff] [blame] | 453 | } |
| 454 | |
Paolo Bonzini | e69d50d | 2020-10-27 04:22:57 -0400 | [diff] [blame] | 455 | static void qemu_start_incoming_migration(const char *uri, Error **errp) |
aliguori | 5bb7910 | 2008-10-13 03:12:02 +0000 | [diff] [blame] | 456 | { |
Longpeng(Mike) | d658f65 | 2020-08-06 15:40:29 +0800 | [diff] [blame] | 457 | const char *p = NULL; |
aliguori | 34c9dd8 | 2008-10-13 03:14:31 +0000 | [diff] [blame] | 458 | |
Lukas Straub | b5eea99 | 2020-12-28 16:08:52 +0100 | [diff] [blame] | 459 | if (!yank_register_instance(MIGRATION_YANK_INSTANCE, errp)) { |
| 460 | return; |
| 461 | } |
| 462 | |
Peter Xu | 3ab7238 | 2018-08-15 21:37:37 +0800 | [diff] [blame] | 463 | qapi_event_send_migration(MIGRATION_STATUS_SETUP); |
Paolo Bonzini | e69d50d | 2020-10-27 04:22:57 -0400 | [diff] [blame] | 464 | if (strstart(uri, "tcp:", &p) || |
| 465 | strstart(uri, "unix:", NULL) || |
| 466 | strstart(uri, "vsock:", NULL)) { |
Longpeng(Mike) | d658f65 | 2020-08-06 15:40:29 +0800 | [diff] [blame] | 467 | socket_start_incoming_migration(p ? p : uri, errp); |
Michael R. Hines | 2da776d | 2013-07-22 10:01:54 -0400 | [diff] [blame] | 468 | #ifdef CONFIG_RDMA |
Dr. David Alan Gilbert | adde220 | 2015-02-19 11:40:27 +0000 | [diff] [blame] | 469 | } else if (strstart(uri, "rdma:", &p)) { |
Michael R. Hines | 2da776d | 2013-07-22 10:01:54 -0400 | [diff] [blame] | 470 | rdma_start_incoming_migration(p, errp); |
| 471 | #endif |
Dr. David Alan Gilbert | adde220 | 2015-02-19 11:40:27 +0000 | [diff] [blame] | 472 | } else if (strstart(uri, "exec:", &p)) { |
Paolo Bonzini | 43eaae2 | 2012-10-02 18:21:18 +0200 | [diff] [blame] | 473 | exec_start_incoming_migration(p, errp); |
Dr. David Alan Gilbert | adde220 | 2015-02-19 11:40:27 +0000 | [diff] [blame] | 474 | } else if (strstart(uri, "fd:", &p)) { |
Paolo Bonzini | 43eaae2 | 2012-10-02 18:21:18 +0200 | [diff] [blame] | 475 | fd_start_incoming_migration(p, errp); |
Dr. David Alan Gilbert | adde220 | 2015-02-19 11:40:27 +0000 | [diff] [blame] | 476 | } else { |
Lukas Straub | b5eea99 | 2020-12-28 16:08:52 +0100 | [diff] [blame] | 477 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); |
Markus Armbruster | 312fd5f | 2013-02-08 21:22:16 +0100 | [diff] [blame] | 478 | error_setg(errp, "unknown migration protocol: %s", uri); |
Juan Quintela | 8ca5e80 | 2010-06-09 14:10:54 +0200 | [diff] [blame] | 479 | } |
aliguori | 5bb7910 | 2008-10-13 03:12:02 +0000 | [diff] [blame] | 480 | } |
| 481 | |
Denis V. Lunev | 0aa6aef | 2016-02-24 11:53:38 +0300 | [diff] [blame] | 482 | static void process_incoming_migration_bh(void *opaque) |
| 483 | { |
| 484 | Error *local_err = NULL; |
| 485 | MigrationIncomingState *mis = opaque; |
| 486 | |
Dr. David Alan Gilbert | 0f073f4 | 2018-04-16 18:09:30 +0100 | [diff] [blame] | 487 | /* If capability late_block_activate is set: |
| 488 | * Only fire up the block code now if we're going to restart the |
| 489 | * VM, else 'cont' will do it. |
| 490 | * This causes file locking to happen; so we don't want it to happen |
| 491 | * unless we really are starting the VM. |
| 492 | */ |
| 493 | if (!migrate_late_block_activate() || |
| 494 | (autostart && (!global_state_received() || |
| 495 | global_state_get_runstate() == RUN_STATE_RUNNING))) { |
| 496 | /* Make sure all file formats flush their mutable metadata. |
| 497 | * If we get an error here, just don't restart the VM yet. */ |
| 498 | bdrv_invalidate_cache_all(&local_err); |
| 499 | if (local_err) { |
| 500 | error_report_err(local_err); |
| 501 | local_err = NULL; |
| 502 | autostart = false; |
| 503 | } |
Kevin Wolf | d35ff5e | 2017-04-04 17:29:03 +0200 | [diff] [blame] | 504 | } |
| 505 | |
Denis V. Lunev | 0aa6aef | 2016-02-24 11:53:38 +0300 | [diff] [blame] | 506 | /* |
| 507 | * This must happen after all error conditions are dealt with and |
| 508 | * we're sure the VM is going to be running on this host. |
| 509 | */ |
Dr. David Alan Gilbert | 7659505 | 2019-02-27 13:24:08 +0000 | [diff] [blame] | 510 | qemu_announce_self(&mis->announce_timer, migrate_announce_params()); |
Denis V. Lunev | 0aa6aef | 2016-02-24 11:53:38 +0300 | [diff] [blame] | 511 | |
Juan Quintela | f986c3d | 2016-01-14 16:52:55 +0100 | [diff] [blame] | 512 | if (multifd_load_cleanup(&local_err) != 0) { |
| 513 | error_report_err(local_err); |
| 514 | autostart = false; |
| 515 | } |
Denis V. Lunev | 0aa6aef | 2016-02-24 11:53:38 +0300 | [diff] [blame] | 516 | /* If global state section was not received or we are in running |
| 517 | state, we need to obey autostart. Any other state is set with |
| 518 | runstate_set. */ |
| 519 | |
Vladimir Sementsov-Ogievskiy | b35ebdf | 2018-03-13 15:34:01 -0400 | [diff] [blame] | 520 | dirty_bitmap_mig_before_vm_start(); |
| 521 | |
Denis V. Lunev | 0aa6aef | 2016-02-24 11:53:38 +0300 | [diff] [blame] | 522 | if (!global_state_received() || |
| 523 | global_state_get_runstate() == RUN_STATE_RUNNING) { |
| 524 | if (autostart) { |
| 525 | vm_start(); |
| 526 | } else { |
| 527 | runstate_set(RUN_STATE_PAUSED); |
| 528 | } |
Zhang Chen | db00972 | 2019-03-03 22:50:17 +0800 | [diff] [blame] | 529 | } else if (migration_incoming_colo_enabled()) { |
| 530 | migration_incoming_disable_colo(); |
| 531 | vm_start(); |
Denis V. Lunev | 0aa6aef | 2016-02-24 11:53:38 +0300 | [diff] [blame] | 532 | } else { |
| 533 | runstate_set(global_state_get_runstate()); |
| 534 | } |
Denis V. Lunev | 0aa6aef | 2016-02-24 11:53:38 +0300 | [diff] [blame] | 535 | /* |
| 536 | * This must happen after any state changes since as soon as an external |
| 537 | * observer sees this event they might start to prod at the VM assuming |
| 538 | * it's ready to use. |
| 539 | */ |
| 540 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, |
| 541 | MIGRATION_STATUS_COMPLETED); |
| 542 | qemu_bh_delete(mis->bh); |
| 543 | migration_incoming_state_destroy(); |
| 544 | } |
| 545 | |
Paolo Bonzini | 82a4da7 | 2012-08-07 10:57:43 +0200 | [diff] [blame] | 546 | static void process_incoming_migration_co(void *opaque) |
Juan Quintela | 511c023 | 2010-06-09 14:10:55 +0200 | [diff] [blame] | 547 | { |
Juan Quintela | b4b076d | 2017-01-23 22:32:06 +0100 | [diff] [blame] | 548 | MigrationIncomingState *mis = migration_incoming_get_current(); |
Dr. David Alan Gilbert | e9bef23 | 2015-11-05 18:11:21 +0000 | [diff] [blame] | 549 | PostcopyState ps; |
Paolo Bonzini | 1c12e1f | 2012-08-07 10:51:51 +0200 | [diff] [blame] | 550 | int ret; |
Zhang Chen | 8e48ac9 | 2018-09-03 12:38:46 +0800 | [diff] [blame] | 551 | Error *local_err = NULL; |
Paolo Bonzini | 1c12e1f | 2012-08-07 10:51:51 +0200 | [diff] [blame] | 552 | |
Juan Quintela | 4f0fae7 | 2017-07-24 12:42:02 +0200 | [diff] [blame] | 553 | assert(mis->from_src_file); |
Lidong Chen | 9237098 | 2018-08-06 21:29:35 +0800 | [diff] [blame] | 554 | mis->migration_incoming_co = qemu_coroutine_self(); |
Dr. David Alan Gilbert | 67f11b5 | 2017-02-24 18:28:34 +0000 | [diff] [blame] | 555 | mis->largest_page_size = qemu_ram_pagesize_largest(); |
Dr. David Alan Gilbert | 093e3c4 | 2015-11-05 18:10:52 +0000 | [diff] [blame] | 556 | postcopy_state_set(POSTCOPY_INCOMING_NONE); |
zhanghailiang | 93d7af6 | 2015-12-16 11:47:34 +0000 | [diff] [blame] | 557 | migrate_set_state(&mis->state, MIGRATION_STATUS_NONE, |
| 558 | MIGRATION_STATUS_ACTIVE); |
Juan Quintela | 4f0fae7 | 2017-07-24 12:42:02 +0200 | [diff] [blame] | 559 | ret = qemu_loadvm_state(mis->from_src_file); |
Dr. David Alan Gilbert | bca7856 | 2015-05-21 13:24:14 +0100 | [diff] [blame] | 560 | |
Dr. David Alan Gilbert | e9bef23 | 2015-11-05 18:11:21 +0000 | [diff] [blame] | 561 | ps = postcopy_state_get(); |
| 562 | trace_process_incoming_migration_co_end(ret, ps); |
| 563 | if (ps != POSTCOPY_INCOMING_NONE) { |
| 564 | if (ps == POSTCOPY_INCOMING_ADVISE) { |
| 565 | /* |
| 566 | * Where a migration had postcopy enabled (and thus went to advise) |
| 567 | * but managed to complete within the precopy period, we can use |
| 568 | * the normal exit. |
| 569 | */ |
| 570 | postcopy_ram_incoming_cleanup(mis); |
| 571 | } else if (ret >= 0) { |
| 572 | /* |
| 573 | * Postcopy was started, cleanup should happen at the end of the |
| 574 | * postcopy thread. |
| 575 | */ |
| 576 | trace_process_incoming_migration_co_postcopy_end_main(); |
| 577 | return; |
| 578 | } |
| 579 | /* Else if something went wrong then just fall out of the normal exit */ |
| 580 | } |
| 581 | |
zhanghailiang | 25d0c16 | 2016-10-27 14:42:55 +0800 | [diff] [blame] | 582 | /* we get COLO info, and know if we are in COLO mode */ |
Zhang Chen | aad555c | 2018-09-03 12:38:47 +0800 | [diff] [blame] | 583 | if (!ret && migration_incoming_colo_enabled()) { |
Zhang Chen | 8e48ac9 | 2018-09-03 12:38:46 +0800 | [diff] [blame] | 584 | /* Make sure all file formats flush their mutable metadata */ |
| 585 | bdrv_invalidate_cache_all(&local_err); |
| 586 | if (local_err) { |
Zhang Chen | 8e48ac9 | 2018-09-03 12:38:46 +0800 | [diff] [blame] | 587 | error_report_err(local_err); |
Fei Li | 6d99c2d | 2019-01-13 22:08:49 +0800 | [diff] [blame] | 588 | goto fail; |
Zhang Chen | 8e48ac9 | 2018-09-03 12:38:46 +0800 | [diff] [blame] | 589 | } |
| 590 | |
zhanghailiang | 25d0c16 | 2016-10-27 14:42:55 +0800 | [diff] [blame] | 591 | qemu_thread_create(&mis->colo_incoming_thread, "COLO incoming", |
| 592 | colo_process_incoming_thread, mis, QEMU_THREAD_JOINABLE); |
| 593 | mis->have_colo_incoming_thread = true; |
| 594 | qemu_coroutine_yield(); |
| 595 | |
| 596 | /* Wait checkpoint incoming thread exit before free resource */ |
| 597 | qemu_thread_join(&mis->colo_incoming_thread); |
Zhang Chen | 13af18f | 2018-09-03 12:38:48 +0800 | [diff] [blame] | 598 | /* We hold the global iothread lock, so it is safe here */ |
| 599 | colo_release_ram_cache(); |
zhanghailiang | 25d0c16 | 2016-10-27 14:42:55 +0800 | [diff] [blame] | 600 | } |
| 601 | |
Paolo Bonzini | 1c12e1f | 2012-08-07 10:51:51 +0200 | [diff] [blame] | 602 | if (ret < 0) { |
Peter Lieven | db80fac | 2014-06-10 11:29:16 +0200 | [diff] [blame] | 603 | error_report("load of migration failed: %s", strerror(-ret)); |
Fei Li | 6d99c2d | 2019-01-13 22:08:49 +0800 | [diff] [blame] | 604 | goto fail; |
Juan Quintela | 511c023 | 2010-06-09 14:10:55 +0200 | [diff] [blame] | 605 | } |
Denis V. Lunev | 0aa6aef | 2016-02-24 11:53:38 +0300 | [diff] [blame] | 606 | mis->bh = qemu_bh_new(process_incoming_migration_bh, mis); |
| 607 | qemu_bh_schedule(mis->bh); |
Lidong Chen | 9237098 | 2018-08-06 21:29:35 +0800 | [diff] [blame] | 608 | mis->migration_incoming_co = NULL; |
Fei Li | 6d99c2d | 2019-01-13 22:08:49 +0800 | [diff] [blame] | 609 | return; |
| 610 | fail: |
| 611 | local_err = NULL; |
| 612 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, |
| 613 | MIGRATION_STATUS_FAILED); |
| 614 | qemu_fclose(mis->from_src_file); |
| 615 | if (multifd_load_cleanup(&local_err) != 0) { |
| 616 | error_report_err(local_err); |
| 617 | } |
| 618 | exit(EXIT_FAILURE); |
Juan Quintela | 511c023 | 2010-06-09 14:10:55 +0200 | [diff] [blame] | 619 | } |
| 620 | |
Juan Quintela | b673eab | 2019-06-12 11:44:19 +0200 | [diff] [blame] | 621 | /** |
| 622 | * @migration_incoming_setup: Setup incoming migration |
| 623 | * |
| 624 | * Returns 0 for no error or 1 for error |
| 625 | * |
| 626 | * @f: file for main migration channel |
| 627 | * @errp: where to put errors |
| 628 | */ |
| 629 | static int migration_incoming_setup(QEMUFile *f, Error **errp) |
Paolo Bonzini | 82a4da7 | 2012-08-07 10:57:43 +0200 | [diff] [blame] | 630 | { |
Juan Quintela | 4f0fae7 | 2017-07-24 12:42:02 +0200 | [diff] [blame] | 631 | MigrationIncomingState *mis = migration_incoming_get_current(); |
Juan Quintela | b673eab | 2019-06-12 11:44:19 +0200 | [diff] [blame] | 632 | Error *local_err = NULL; |
Paolo Bonzini | 82a4da7 | 2012-08-07 10:57:43 +0200 | [diff] [blame] | 633 | |
Juan Quintela | b673eab | 2019-06-12 11:44:19 +0200 | [diff] [blame] | 634 | if (multifd_load_setup(&local_err) != 0) { |
Juan Quintela | f986c3d | 2016-01-14 16:52:55 +0100 | [diff] [blame] | 635 | /* We haven't been able to create multifd threads |
| 636 | nothing better to do */ |
Juan Quintela | b673eab | 2019-06-12 11:44:19 +0200 | [diff] [blame] | 637 | error_report_err(local_err); |
Juan Quintela | f986c3d | 2016-01-14 16:52:55 +0100 | [diff] [blame] | 638 | exit(EXIT_FAILURE); |
| 639 | } |
| 640 | |
Juan Quintela | 4f0fae7 | 2017-07-24 12:42:02 +0200 | [diff] [blame] | 641 | if (!mis->from_src_file) { |
| 642 | mis->from_src_file = f; |
| 643 | } |
Daniel P. Berrange | 06ad513 | 2016-04-27 11:04:56 +0100 | [diff] [blame] | 644 | qemu_file_set_blocking(f, false); |
Juan Quintela | b673eab | 2019-06-12 11:44:19 +0200 | [diff] [blame] | 645 | return 0; |
Juan Quintela | e595a01 | 2017-07-17 12:30:25 +0200 | [diff] [blame] | 646 | } |
| 647 | |
Juan Quintela | 36c2f8b | 2018-03-07 08:40:52 +0100 | [diff] [blame] | 648 | void migration_incoming_process(void) |
Juan Quintela | e595a01 | 2017-07-17 12:30:25 +0200 | [diff] [blame] | 649 | { |
| 650 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co, NULL); |
Paolo Bonzini | 0b8b875 | 2016-07-04 19:10:01 +0200 | [diff] [blame] | 651 | qemu_coroutine_enter(co); |
Paolo Bonzini | 82a4da7 | 2012-08-07 10:57:43 +0200 | [diff] [blame] | 652 | } |
| 653 | |
Peter Xu | 884835f | 2018-06-27 21:22:45 +0800 | [diff] [blame] | 654 | /* Returns true if recovered from a paused migration, otherwise false */ |
| 655 | static bool postcopy_try_recover(QEMUFile *f) |
Juan Quintela | e595a01 | 2017-07-17 12:30:25 +0200 | [diff] [blame] | 656 | { |
Peter Xu | d96c9e8 | 2018-05-02 18:47:26 +0800 | [diff] [blame] | 657 | MigrationIncomingState *mis = migration_incoming_get_current(); |
| 658 | |
| 659 | if (mis->state == MIGRATION_STATUS_POSTCOPY_PAUSED) { |
| 660 | /* Resumed from a paused postcopy migration */ |
| 661 | |
| 662 | mis->from_src_file = f; |
| 663 | /* Postcopy has standalone thread to do vm load */ |
| 664 | qemu_file_set_blocking(f, true); |
| 665 | |
| 666 | /* Re-configure the return path */ |
| 667 | mis->to_src_file = qemu_file_get_return_path(f); |
| 668 | |
| 669 | migrate_set_state(&mis->state, MIGRATION_STATUS_POSTCOPY_PAUSED, |
| 670 | MIGRATION_STATUS_POSTCOPY_RECOVER); |
| 671 | |
| 672 | /* |
| 673 | * Here, we only wake up the main loading thread (while the |
| 674 | * fault thread will still be waiting), so that we can receive |
| 675 | * commands from source now, and answer it if needed. The |
| 676 | * fault thread will be woken up afterwards until we are sure |
| 677 | * that source is ready to reply to page requests. |
| 678 | */ |
| 679 | qemu_sem_post(&mis->postcopy_pause_sem_dst); |
Peter Xu | 884835f | 2018-06-27 21:22:45 +0800 | [diff] [blame] | 680 | return true; |
Peter Xu | d96c9e8 | 2018-05-02 18:47:26 +0800 | [diff] [blame] | 681 | } |
Peter Xu | 884835f | 2018-06-27 21:22:45 +0800 | [diff] [blame] | 682 | |
| 683 | return false; |
| 684 | } |
| 685 | |
Juan Quintela | b673eab | 2019-06-12 11:44:19 +0200 | [diff] [blame] | 686 | void migration_fd_process_incoming(QEMUFile *f, Error **errp) |
Peter Xu | 884835f | 2018-06-27 21:22:45 +0800 | [diff] [blame] | 687 | { |
Juan Quintela | b673eab | 2019-06-12 11:44:19 +0200 | [diff] [blame] | 688 | Error *local_err = NULL; |
| 689 | |
Peter Xu | 884835f | 2018-06-27 21:22:45 +0800 | [diff] [blame] | 690 | if (postcopy_try_recover(f)) { |
| 691 | return; |
| 692 | } |
| 693 | |
Juan Quintela | b673eab | 2019-06-12 11:44:19 +0200 | [diff] [blame] | 694 | if (migration_incoming_setup(f, &local_err)) { |
Markus Armbruster | 2155cea | 2020-07-22 10:40:47 +0200 | [diff] [blame] | 695 | error_propagate(errp, local_err); |
Juan Quintela | b673eab | 2019-06-12 11:44:19 +0200 | [diff] [blame] | 696 | return; |
| 697 | } |
Peter Xu | 884835f | 2018-06-27 21:22:45 +0800 | [diff] [blame] | 698 | migration_incoming_process(); |
Juan Quintela | e595a01 | 2017-07-17 12:30:25 +0200 | [diff] [blame] | 699 | } |
| 700 | |
Fei Li | 49ed0d2 | 2019-01-13 22:08:46 +0800 | [diff] [blame] | 701 | void migration_ioc_process_incoming(QIOChannel *ioc, Error **errp) |
Juan Quintela | 4f0fae7 | 2017-07-24 12:42:02 +0200 | [diff] [blame] | 702 | { |
| 703 | MigrationIncomingState *mis = migration_incoming_get_current(); |
Juan Quintela | b673eab | 2019-06-12 11:44:19 +0200 | [diff] [blame] | 704 | Error *local_err = NULL; |
Peter Xu | a429e7f | 2018-06-27 21:22:46 +0800 | [diff] [blame] | 705 | bool start_migration; |
Juan Quintela | 4f0fae7 | 2017-07-24 12:42:02 +0200 | [diff] [blame] | 706 | |
| 707 | if (!mis->from_src_file) { |
Peter Xu | a429e7f | 2018-06-27 21:22:46 +0800 | [diff] [blame] | 708 | /* The first connection (multifd may have multiple) */ |
Juan Quintela | 4f0fae7 | 2017-07-24 12:42:02 +0200 | [diff] [blame] | 709 | QEMUFile *f = qemu_fopen_channel_input(ioc); |
Peter Xu | a429e7f | 2018-06-27 21:22:46 +0800 | [diff] [blame] | 710 | |
| 711 | /* If it's a recovery, we're done */ |
Peter Xu | 884835f | 2018-06-27 21:22:45 +0800 | [diff] [blame] | 712 | if (postcopy_try_recover(f)) { |
| 713 | return; |
| 714 | } |
Peter Xu | a429e7f | 2018-06-27 21:22:46 +0800 | [diff] [blame] | 715 | |
Juan Quintela | b673eab | 2019-06-12 11:44:19 +0200 | [diff] [blame] | 716 | if (migration_incoming_setup(f, &local_err)) { |
Markus Armbruster | 2155cea | 2020-07-22 10:40:47 +0200 | [diff] [blame] | 717 | error_propagate(errp, local_err); |
Juan Quintela | b673eab | 2019-06-12 11:44:19 +0200 | [diff] [blame] | 718 | return; |
| 719 | } |
Peter Xu | a429e7f | 2018-06-27 21:22:46 +0800 | [diff] [blame] | 720 | |
| 721 | /* |
| 722 | * Common migration only needs one channel, so we can start |
| 723 | * right now. Multifd needs more than one channel, we wait. |
| 724 | */ |
| 725 | start_migration = !migrate_use_multifd(); |
| 726 | } else { |
| 727 | /* Multiple connections */ |
| 728 | assert(migrate_use_multifd()); |
Fei Li | 49ed0d2 | 2019-01-13 22:08:46 +0800 | [diff] [blame] | 729 | start_migration = multifd_recv_new_channel(ioc, &local_err); |
| 730 | if (local_err) { |
| 731 | error_propagate(errp, local_err); |
| 732 | return; |
| 733 | } |
Juan Quintela | 4f0fae7 | 2017-07-24 12:42:02 +0200 | [diff] [blame] | 734 | } |
Peter Xu | 81e6205 | 2018-06-27 21:22:44 +0800 | [diff] [blame] | 735 | |
Peter Xu | a429e7f | 2018-06-27 21:22:46 +0800 | [diff] [blame] | 736 | if (start_migration) { |
Peter Xu | 81e6205 | 2018-06-27 21:22:44 +0800 | [diff] [blame] | 737 | migration_incoming_process(); |
| 738 | } |
Juan Quintela | 4f0fae7 | 2017-07-24 12:42:02 +0200 | [diff] [blame] | 739 | } |
| 740 | |
Juan Quintela | 428d890 | 2017-07-24 13:06:25 +0200 | [diff] [blame] | 741 | /** |
| 742 | * @migration_has_all_channels: We have received all channels that we need |
| 743 | * |
| 744 | * Returns true when we have got connections to all the channels that |
| 745 | * we need for migration. |
| 746 | */ |
| 747 | bool migration_has_all_channels(void) |
| 748 | { |
Daniel P. Berrangé | ca273df | 2018-06-19 17:35:52 +0100 | [diff] [blame] | 749 | MigrationIncomingState *mis = migration_incoming_get_current(); |
Juan Quintela | 62c1e0c | 2018-02-19 18:59:02 +0100 | [diff] [blame] | 750 | bool all_channels; |
| 751 | |
| 752 | all_channels = multifd_recv_all_channels_created(); |
| 753 | |
Daniel P. Berrangé | ca273df | 2018-06-19 17:35:52 +0100 | [diff] [blame] | 754 | return all_channels && mis->from_src_file != NULL; |
Juan Quintela | 428d890 | 2017-07-24 13:06:25 +0200 | [diff] [blame] | 755 | } |
| 756 | |
Dr. David Alan Gilbert | 6decec9 | 2015-11-05 18:10:47 +0000 | [diff] [blame] | 757 | /* |
Dr. David Alan Gilbert | 6decec9 | 2015-11-05 18:10:47 +0000 | [diff] [blame] | 758 | * Send a 'SHUT' message on the return channel with the given value |
| 759 | * to indicate that we've finished with the RP. Non-0 value indicates |
| 760 | * error. |
| 761 | */ |
| 762 | void migrate_send_rp_shut(MigrationIncomingState *mis, |
| 763 | uint32_t value) |
| 764 | { |
| 765 | uint32_t buf; |
| 766 | |
| 767 | buf = cpu_to_be32(value); |
| 768 | migrate_send_rp_message(mis, MIG_RP_MSG_SHUT, sizeof(buf), &buf); |
| 769 | } |
| 770 | |
| 771 | /* |
| 772 | * Send a 'PONG' message on the return channel with the given value |
| 773 | * (normally in response to a 'PING') |
| 774 | */ |
| 775 | void migrate_send_rp_pong(MigrationIncomingState *mis, |
| 776 | uint32_t value) |
| 777 | { |
| 778 | uint32_t buf; |
| 779 | |
| 780 | buf = cpu_to_be32(value); |
| 781 | migrate_send_rp_message(mis, MIG_RP_MSG_PONG, sizeof(buf), &buf); |
| 782 | } |
| 783 | |
Peter Xu | a335deb | 2018-05-02 18:47:28 +0800 | [diff] [blame] | 784 | void migrate_send_rp_recv_bitmap(MigrationIncomingState *mis, |
| 785 | char *block_name) |
| 786 | { |
| 787 | char buf[512]; |
| 788 | int len; |
| 789 | int64_t res; |
| 790 | |
| 791 | /* |
| 792 | * First, we send the header part. It contains only the len of |
| 793 | * idstr, and the idstr itself. |
| 794 | */ |
| 795 | len = strlen(block_name); |
| 796 | buf[0] = len; |
| 797 | memcpy(buf + 1, block_name, len); |
| 798 | |
| 799 | if (mis->state != MIGRATION_STATUS_POSTCOPY_RECOVER) { |
| 800 | error_report("%s: MSG_RP_RECV_BITMAP only used for recovery", |
| 801 | __func__); |
| 802 | return; |
| 803 | } |
| 804 | |
| 805 | migrate_send_rp_message(mis, MIG_RP_MSG_RECV_BITMAP, len + 1, buf); |
| 806 | |
| 807 | /* |
| 808 | * Next, we dump the received bitmap to the stream. |
| 809 | * |
| 810 | * TODO: currently we are safe since we are the only one that is |
| 811 | * using the to_src_file handle (fault thread is still paused), |
| 812 | * and it's ok even not taking the mutex. However the best way is |
| 813 | * to take the lock before sending the message header, and release |
| 814 | * the lock after sending the bitmap. |
| 815 | */ |
| 816 | qemu_mutex_lock(&mis->rp_mutex); |
| 817 | res = ramblock_recv_bitmap_send(mis->to_src_file, block_name); |
| 818 | qemu_mutex_unlock(&mis->rp_mutex); |
| 819 | |
| 820 | trace_migrate_send_rp_recv_bitmap(block_name, res); |
| 821 | } |
| 822 | |
Peter Xu | 13955b8 | 2018-05-02 18:47:30 +0800 | [diff] [blame] | 823 | void migrate_send_rp_resume_ack(MigrationIncomingState *mis, uint32_t value) |
| 824 | { |
| 825 | uint32_t buf; |
| 826 | |
| 827 | buf = cpu_to_be32(value); |
| 828 | migrate_send_rp_message(mis, MIG_RP_MSG_RESUME_ACK, sizeof(buf), &buf); |
| 829 | } |
| 830 | |
Orit Wasserman | bbf6da3 | 2012-08-06 21:42:47 +0300 | [diff] [blame] | 831 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
| 832 | { |
Eric Blake | 95b3a8c | 2021-01-13 16:10:13 -0600 | [diff] [blame] | 833 | MigrationCapabilityStatusList *head = NULL, **tail = &head; |
| 834 | MigrationCapabilityStatus *caps; |
Orit Wasserman | bbf6da3 | 2012-08-06 21:42:47 +0300 | [diff] [blame] | 835 | MigrationState *s = migrate_get_current(); |
| 836 | int i; |
| 837 | |
Eric Blake | 7fb1cf1 | 2015-11-18 01:52:57 -0700 | [diff] [blame] | 838 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
Dr. David Alan Gilbert | ed1701c | 2017-05-15 15:05:29 +0100 | [diff] [blame] | 839 | #ifndef CONFIG_LIVE_BLOCK_MIGRATION |
| 840 | if (i == MIGRATION_CAPABILITY_BLOCK) { |
| 841 | continue; |
| 842 | } |
| 843 | #endif |
Eric Blake | 95b3a8c | 2021-01-13 16:10:13 -0600 | [diff] [blame] | 844 | caps = g_malloc0(sizeof(*caps)); |
| 845 | caps->capability = i; |
| 846 | caps->state = s->enabled_capabilities[i]; |
| 847 | QAPI_LIST_APPEND(tail, caps); |
Orit Wasserman | bbf6da3 | 2012-08-06 21:42:47 +0300 | [diff] [blame] | 848 | } |
| 849 | |
| 850 | return head; |
| 851 | } |
| 852 | |
Liang Li | 85de832 | 2015-03-23 16:32:28 +0800 | [diff] [blame] | 853 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
| 854 | { |
| 855 | MigrationParameters *params; |
| 856 | MigrationState *s = migrate_get_current(); |
| 857 | |
Markus Armbruster | e87fae4 | 2017-07-18 12:57:38 +0200 | [diff] [blame] | 858 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
Liang Li | 85de832 | 2015-03-23 16:32:28 +0800 | [diff] [blame] | 859 | params = g_malloc0(sizeof(*params)); |
Eric Blake | de63ab6 | 2016-09-08 22:14:15 -0500 | [diff] [blame] | 860 | params->has_compress_level = true; |
Daniel P. Berrange | 2594f56 | 2016-04-27 11:05:14 +0100 | [diff] [blame] | 861 | params->compress_level = s->parameters.compress_level; |
Eric Blake | de63ab6 | 2016-09-08 22:14:15 -0500 | [diff] [blame] | 862 | params->has_compress_threads = true; |
Daniel P. Berrange | 2594f56 | 2016-04-27 11:05:14 +0100 | [diff] [blame] | 863 | params->compress_threads = s->parameters.compress_threads; |
Xiao Guangrong | 1d58872 | 2018-08-21 16:10:20 +0800 | [diff] [blame] | 864 | params->has_compress_wait_thread = true; |
| 865 | params->compress_wait_thread = s->parameters.compress_wait_thread; |
Eric Blake | de63ab6 | 2016-09-08 22:14:15 -0500 | [diff] [blame] | 866 | params->has_decompress_threads = true; |
Daniel P. Berrange | 2594f56 | 2016-04-27 11:05:14 +0100 | [diff] [blame] | 867 | params->decompress_threads = s->parameters.decompress_threads; |
Keqian Zhu | dc14a47 | 2020-02-24 10:31:42 +0800 | [diff] [blame] | 868 | params->has_throttle_trigger_threshold = true; |
| 869 | params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold; |
Eric Blake | de63ab6 | 2016-09-08 22:14:15 -0500 | [diff] [blame] | 870 | params->has_cpu_throttle_initial = true; |
Daniel P. Berrange | 2594f56 | 2016-04-27 11:05:14 +0100 | [diff] [blame] | 871 | params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; |
Eric Blake | de63ab6 | 2016-09-08 22:14:15 -0500 | [diff] [blame] | 872 | params->has_cpu_throttle_increment = true; |
Daniel P. Berrange | 2594f56 | 2016-04-27 11:05:14 +0100 | [diff] [blame] | 873 | params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; |
Keqian Zhu | cbbf818 | 2020-04-13 18:15:08 +0800 | [diff] [blame] | 874 | params->has_cpu_throttle_tailslow = true; |
| 875 | params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow; |
Markus Armbruster | 8cc99dc | 2017-07-18 12:04:54 +0200 | [diff] [blame] | 876 | params->has_tls_creds = true; |
Daniel P. Berrange | 69ef1f3 | 2016-04-27 11:05:15 +0100 | [diff] [blame] | 877 | params->tls_creds = g_strdup(s->parameters.tls_creds); |
Markus Armbruster | 8cc99dc | 2017-07-18 12:04:54 +0200 | [diff] [blame] | 878 | params->has_tls_hostname = true; |
Daniel P. Berrange | 69ef1f3 | 2016-04-27 11:05:15 +0100 | [diff] [blame] | 879 | params->tls_hostname = g_strdup(s->parameters.tls_hostname); |
Daniel P. Berrange | d2f1d29 | 2019-02-27 14:53:24 +0000 | [diff] [blame] | 880 | params->has_tls_authz = true; |
Mao Zhongyi | 7cd75cb | 2020-03-25 09:49:30 +0800 | [diff] [blame] | 881 | params->tls_authz = g_strdup(s->parameters.tls_authz ? |
| 882 | s->parameters.tls_authz : ""); |
Ashijeet Acharya | 2ff3025 | 2016-09-15 21:50:28 +0530 | [diff] [blame] | 883 | params->has_max_bandwidth = true; |
| 884 | params->max_bandwidth = s->parameters.max_bandwidth; |
| 885 | params->has_downtime_limit = true; |
| 886 | params->downtime_limit = s->parameters.downtime_limit; |
zhanghailiang | fe39a4d | 2016-11-02 15:42:09 +0800 | [diff] [blame] | 887 | params->has_x_checkpoint_delay = true; |
zhanghailiang | 68b5359 | 2016-10-27 14:43:01 +0800 | [diff] [blame] | 888 | params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; |
Juan Quintela | 2833c59 | 2017-04-05 18:32:37 +0200 | [diff] [blame] | 889 | params->has_block_incremental = true; |
| 890 | params->block_incremental = s->parameters.block_incremental; |
Juan Quintela | cbfd6c9 | 2019-02-06 13:54:06 +0100 | [diff] [blame] | 891 | params->has_multifd_channels = true; |
| 892 | params->multifd_channels = s->parameters.multifd_channels; |
Juan Quintela | 96eef04 | 2019-01-16 10:35:55 +0100 | [diff] [blame] | 893 | params->has_multifd_compression = true; |
| 894 | params->multifd_compression = s->parameters.multifd_compression; |
Juan Quintela | 9004db4 | 2020-01-23 17:08:52 +0100 | [diff] [blame] | 895 | params->has_multifd_zlib_level = true; |
| 896 | params->multifd_zlib_level = s->parameters.multifd_zlib_level; |
Juan Quintela | 6a9ad15 | 2020-01-23 17:41:36 +0100 | [diff] [blame] | 897 | params->has_multifd_zstd_level = true; |
| 898 | params->multifd_zstd_level = s->parameters.multifd_zstd_level; |
Juan Quintela | 73af8dd | 2017-10-05 21:30:10 +0200 | [diff] [blame] | 899 | params->has_xbzrle_cache_size = true; |
| 900 | params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; |
Dr. David Alan Gilbert | 7e555c6 | 2018-06-13 11:26:40 +0100 | [diff] [blame] | 901 | params->has_max_postcopy_bandwidth = true; |
| 902 | params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; |
Li Qiang | 4cbc9c7 | 2018-08-01 06:00:20 -0700 | [diff] [blame] | 903 | params->has_max_cpu_throttle = true; |
| 904 | params->max_cpu_throttle = s->parameters.max_cpu_throttle; |
Dr. David Alan Gilbert | ee3d96b | 2019-02-27 13:24:06 +0000 | [diff] [blame] | 905 | params->has_announce_initial = true; |
| 906 | params->announce_initial = s->parameters.announce_initial; |
| 907 | params->has_announce_max = true; |
| 908 | params->announce_max = s->parameters.announce_max; |
| 909 | params->has_announce_rounds = true; |
| 910 | params->announce_rounds = s->parameters.announce_rounds; |
| 911 | params->has_announce_step = true; |
| 912 | params->announce_step = s->parameters.announce_step; |
Liang Li | 85de832 | 2015-03-23 16:32:28 +0800 | [diff] [blame] | 913 | |
Max Reitz | 31e4c35 | 2020-08-20 17:07:23 +0200 | [diff] [blame] | 914 | if (s->parameters.has_block_bitmap_mapping) { |
| 915 | params->has_block_bitmap_mapping = true; |
| 916 | params->block_bitmap_mapping = |
| 917 | QAPI_CLONE(BitmapMigrationNodeAliasList, |
| 918 | s->parameters.block_bitmap_mapping); |
| 919 | } |
| 920 | |
Liang Li | 85de832 | 2015-03-23 16:32:28 +0800 | [diff] [blame] | 921 | return params; |
| 922 | } |
| 923 | |
Dr. David Alan Gilbert | ee3d96b | 2019-02-27 13:24:06 +0000 | [diff] [blame] | 924 | AnnounceParameters *migrate_announce_params(void) |
| 925 | { |
| 926 | static AnnounceParameters ap; |
| 927 | |
| 928 | MigrationState *s = migrate_get_current(); |
| 929 | |
| 930 | ap.initial = s->parameters.announce_initial; |
| 931 | ap.max = s->parameters.announce_max; |
| 932 | ap.rounds = s->parameters.announce_rounds; |
| 933 | ap.step = s->parameters.announce_step; |
| 934 | |
| 935 | return ≈ |
| 936 | } |
| 937 | |
Dr. David Alan Gilbert | f6844b9 | 2015-11-05 18:10:48 +0000 | [diff] [blame] | 938 | /* |
| 939 | * Return true if we're already in the middle of a migration |
| 940 | * (i.e. any of the active or setup states) |
| 941 | */ |
Jia Lina | 3d63da1 | 2018-10-26 16:36:20 +0800 | [diff] [blame] | 942 | bool migration_is_setup_or_active(int state) |
Dr. David Alan Gilbert | f6844b9 | 2015-11-05 18:10:48 +0000 | [diff] [blame] | 943 | { |
| 944 | switch (state) { |
| 945 | case MIGRATION_STATUS_ACTIVE: |
Dr. David Alan Gilbert | 9ec055a | 2015-11-05 18:10:58 +0000 | [diff] [blame] | 946 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
Peter Xu | a688d2c | 2018-05-02 18:47:18 +0800 | [diff] [blame] | 947 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
Peter Xu | 135b87b | 2018-05-02 18:47:25 +0800 | [diff] [blame] | 948 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
Dr. David Alan Gilbert | f6844b9 | 2015-11-05 18:10:48 +0000 | [diff] [blame] | 949 | case MIGRATION_STATUS_SETUP: |
Dr. David Alan Gilbert | 31e0607 | 2017-10-20 10:05:51 +0100 | [diff] [blame] | 950 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
| 951 | case MIGRATION_STATUS_DEVICE: |
Jens Freimann | c7e0acd | 2019-10-29 12:49:02 +0100 | [diff] [blame] | 952 | case MIGRATION_STATUS_WAIT_UNPLUG: |
zhanghailiang | 19dd408 | 2020-02-24 14:54:12 +0800 | [diff] [blame] | 953 | case MIGRATION_STATUS_COLO: |
Dr. David Alan Gilbert | f6844b9 | 2015-11-05 18:10:48 +0000 | [diff] [blame] | 954 | return true; |
| 955 | |
| 956 | default: |
| 957 | return false; |
| 958 | |
| 959 | } |
| 960 | } |
| 961 | |
Juan Quintela | 392d87e | 2020-01-21 15:39:23 +0100 | [diff] [blame] | 962 | bool migration_is_running(int state) |
| 963 | { |
| 964 | switch (state) { |
| 965 | case MIGRATION_STATUS_ACTIVE: |
| 966 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
| 967 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
| 968 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
| 969 | case MIGRATION_STATUS_SETUP: |
| 970 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
| 971 | case MIGRATION_STATUS_DEVICE: |
| 972 | case MIGRATION_STATUS_WAIT_UNPLUG: |
| 973 | case MIGRATION_STATUS_CANCELLING: |
Juan Quintela | 392d87e | 2020-01-21 15:39:23 +0100 | [diff] [blame] | 974 | return true; |
| 975 | |
| 976 | default: |
| 977 | return false; |
| 978 | |
| 979 | } |
| 980 | } |
| 981 | |
Wei Yang | 640dfb1 | 2019-07-16 08:54:11 +0800 | [diff] [blame] | 982 | static void populate_time_info(MigrationInfo *info, MigrationState *s) |
| 983 | { |
| 984 | info->has_status = true; |
| 985 | info->has_setup_time = true; |
| 986 | info->setup_time = s->setup_time; |
| 987 | if (s->state == MIGRATION_STATUS_COMPLETED) { |
| 988 | info->has_total_time = true; |
| 989 | info->total_time = s->total_time; |
| 990 | info->has_downtime = true; |
| 991 | info->downtime = s->downtime; |
| 992 | } else { |
| 993 | info->has_total_time = true; |
| 994 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - |
| 995 | s->start_time; |
| 996 | info->has_expected_downtime = true; |
| 997 | info->expected_downtime = s->expected_downtime; |
| 998 | } |
| 999 | } |
| 1000 | |
Dr. David Alan Gilbert | a22463a | 2016-06-13 12:16:41 +0100 | [diff] [blame] | 1001 | static void populate_ram_info(MigrationInfo *info, MigrationState *s) |
| 1002 | { |
| 1003 | info->has_ram = true; |
| 1004 | info->ram = g_malloc0(sizeof(*info->ram)); |
Juan Quintela | 9360447 | 2017-06-06 19:49:03 +0200 | [diff] [blame] | 1005 | info->ram->transferred = ram_counters.transferred; |
Dr. David Alan Gilbert | a22463a | 2016-06-13 12:16:41 +0100 | [diff] [blame] | 1006 | info->ram->total = ram_bytes_total(); |
Juan Quintela | 9360447 | 2017-06-06 19:49:03 +0200 | [diff] [blame] | 1007 | info->ram->duplicate = ram_counters.duplicate; |
Juan Quintela | bedf53c | 2017-03-13 20:35:54 +0100 | [diff] [blame] | 1008 | /* legacy value. It is not used anymore */ |
| 1009 | info->ram->skipped = 0; |
Juan Quintela | 9360447 | 2017-06-06 19:49:03 +0200 | [diff] [blame] | 1010 | info->ram->normal = ram_counters.normal; |
| 1011 | info->ram->normal_bytes = ram_counters.normal * |
Juan Quintela | 20afaed | 2017-03-21 09:09:14 +0100 | [diff] [blame] | 1012 | qemu_target_page_size(); |
Dr. David Alan Gilbert | a22463a | 2016-06-13 12:16:41 +0100 | [diff] [blame] | 1013 | info->ram->mbps = s->mbps; |
Juan Quintela | 9360447 | 2017-06-06 19:49:03 +0200 | [diff] [blame] | 1014 | info->ram->dirty_sync_count = ram_counters.dirty_sync_count; |
| 1015 | info->ram->postcopy_requests = ram_counters.postcopy_requests; |
Chao Fan | 030ce1f | 2017-03-21 10:22:43 +0800 | [diff] [blame] | 1016 | info->ram->page_size = qemu_target_page_size(); |
Juan Quintela | a61c45b | 2018-06-26 15:20:11 +0200 | [diff] [blame] | 1017 | info->ram->multifd_bytes = ram_counters.multifd_bytes; |
Xiao Guangrong | aecbfe9 | 2019-01-11 14:37:30 +0800 | [diff] [blame] | 1018 | info->ram->pages_per_second = s->pages_per_second; |
Dr. David Alan Gilbert | a22463a | 2016-06-13 12:16:41 +0100 | [diff] [blame] | 1019 | |
Juan Quintela | 114f5ae | 2017-05-04 10:09:21 +0200 | [diff] [blame] | 1020 | if (migrate_use_xbzrle()) { |
| 1021 | info->has_xbzrle_cache = true; |
| 1022 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); |
| 1023 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); |
Juan Quintela | 9360447 | 2017-06-06 19:49:03 +0200 | [diff] [blame] | 1024 | info->xbzrle_cache->bytes = xbzrle_counters.bytes; |
| 1025 | info->xbzrle_cache->pages = xbzrle_counters.pages; |
| 1026 | info->xbzrle_cache->cache_miss = xbzrle_counters.cache_miss; |
| 1027 | info->xbzrle_cache->cache_miss_rate = xbzrle_counters.cache_miss_rate; |
Wei Wang | e460a4b | 2020-04-30 08:59:35 +0800 | [diff] [blame] | 1028 | info->xbzrle_cache->encoding_rate = xbzrle_counters.encoding_rate; |
Juan Quintela | 9360447 | 2017-06-06 19:49:03 +0200 | [diff] [blame] | 1029 | info->xbzrle_cache->overflow = xbzrle_counters.overflow; |
Juan Quintela | 114f5ae | 2017-05-04 10:09:21 +0200 | [diff] [blame] | 1030 | } |
| 1031 | |
Xiao Guangrong | 76e0300 | 2018-09-06 15:01:00 +0800 | [diff] [blame] | 1032 | if (migrate_use_compression()) { |
| 1033 | info->has_compression = true; |
| 1034 | info->compression = g_malloc0(sizeof(*info->compression)); |
| 1035 | info->compression->pages = compression_counters.pages; |
| 1036 | info->compression->busy = compression_counters.busy; |
| 1037 | info->compression->busy_rate = compression_counters.busy_rate; |
| 1038 | info->compression->compressed_size = |
| 1039 | compression_counters.compressed_size; |
| 1040 | info->compression->compression_rate = |
| 1041 | compression_counters.compression_rate; |
| 1042 | } |
| 1043 | |
Juan Quintela | 338182c | 2017-05-03 13:16:38 +0200 | [diff] [blame] | 1044 | if (cpu_throttle_active()) { |
| 1045 | info->has_cpu_throttle_percentage = true; |
| 1046 | info->cpu_throttle_percentage = cpu_throttle_get_percentage(); |
| 1047 | } |
| 1048 | |
Dr. David Alan Gilbert | a22463a | 2016-06-13 12:16:41 +0100 | [diff] [blame] | 1049 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
| 1050 | info->ram->remaining = ram_bytes_remaining(); |
Juan Quintela | 9360447 | 2017-06-06 19:49:03 +0200 | [diff] [blame] | 1051 | info->ram->dirty_pages_rate = ram_counters.dirty_pages_rate; |
Dr. David Alan Gilbert | a22463a | 2016-06-13 12:16:41 +0100 | [diff] [blame] | 1052 | } |
| 1053 | } |
| 1054 | |
Juan Quintela | 930ac04 | 2017-05-04 10:21:46 +0200 | [diff] [blame] | 1055 | static void populate_disk_info(MigrationInfo *info) |
| 1056 | { |
| 1057 | if (blk_mig_active()) { |
| 1058 | info->has_disk = true; |
| 1059 | info->disk = g_malloc0(sizeof(*info->disk)); |
| 1060 | info->disk->transferred = blk_mig_bytes_transferred(); |
| 1061 | info->disk->remaining = blk_mig_bytes_remaining(); |
| 1062 | info->disk->total = blk_mig_bytes_total(); |
| 1063 | } |
| 1064 | } |
| 1065 | |
Alexey Perevalov | 65ace06 | 2018-03-22 21:17:27 +0300 | [diff] [blame] | 1066 | static void fill_source_migration_info(MigrationInfo *info) |
aliguori | 5bb7910 | 2008-10-13 03:12:02 +0000 | [diff] [blame] | 1067 | { |
Juan Quintela | 17549e8 | 2011-10-05 13:50:43 +0200 | [diff] [blame] | 1068 | MigrationState *s = migrate_get_current(); |
Markus Armbruster | 372043f | 2021-04-29 16:04:24 +0200 | [diff] [blame] | 1069 | GSList *cur_blocker = migration_blockers; |
aliguori | 376253e | 2009-03-05 23:01:23 +0000 | [diff] [blame] | 1070 | |
Dr. David Alan Gilbert | 3af8554 | 2021-02-02 13:55:21 +0000 | [diff] [blame] | 1071 | info->blocked_reasons = NULL; |
Dr. David Alan Gilbert | 3af8554 | 2021-02-02 13:55:21 +0000 | [diff] [blame] | 1072 | |
Markus Armbruster | 372043f | 2021-04-29 16:04:24 +0200 | [diff] [blame] | 1073 | /* |
| 1074 | * There are two types of reasons a migration might be blocked; |
| 1075 | * a) devices marked in VMState as non-migratable, and |
| 1076 | * b) Explicit migration blockers |
| 1077 | * We need to add both of them here. |
| 1078 | */ |
| 1079 | qemu_savevm_non_migratable_list(&info->blocked_reasons); |
Dr. David Alan Gilbert | 3af8554 | 2021-02-02 13:55:21 +0000 | [diff] [blame] | 1080 | |
Markus Armbruster | 372043f | 2021-04-29 16:04:24 +0200 | [diff] [blame] | 1081 | while (cur_blocker) { |
| 1082 | QAPI_LIST_PREPEND(info->blocked_reasons, |
| 1083 | g_strdup(error_get_pretty(cur_blocker->data))); |
| 1084 | cur_blocker = g_slist_next(cur_blocker); |
Dr. David Alan Gilbert | 3af8554 | 2021-02-02 13:55:21 +0000 | [diff] [blame] | 1085 | } |
Markus Armbruster | 372043f | 2021-04-29 16:04:24 +0200 | [diff] [blame] | 1086 | info->has_blocked_reasons = info->blocked_reasons != NULL; |
Dr. David Alan Gilbert | 3af8554 | 2021-02-02 13:55:21 +0000 | [diff] [blame] | 1087 | |
Juan Quintela | 17549e8 | 2011-10-05 13:50:43 +0200 | [diff] [blame] | 1088 | switch (s->state) { |
zhanghailiang | 3119473 | 2015-03-13 16:08:38 +0800 | [diff] [blame] | 1089 | case MIGRATION_STATUS_NONE: |
Juan Quintela | 17549e8 | 2011-10-05 13:50:43 +0200 | [diff] [blame] | 1090 | /* no migration has happened ever */ |
Alexey Perevalov | 65ace06 | 2018-03-22 21:17:27 +0300 | [diff] [blame] | 1091 | /* do not overwrite destination migration status */ |
| 1092 | return; |
zhanghailiang | 3119473 | 2015-03-13 16:08:38 +0800 | [diff] [blame] | 1093 | case MIGRATION_STATUS_SETUP: |
Michael R. Hines | 29ae8a4 | 2013-07-22 10:01:57 -0400 | [diff] [blame] | 1094 | info->has_status = true; |
Michael R. Hines | ed4fbd1 | 2013-07-22 10:01:58 -0400 | [diff] [blame] | 1095 | info->has_total_time = false; |
Michael R. Hines | 29ae8a4 | 2013-07-22 10:01:57 -0400 | [diff] [blame] | 1096 | break; |
zhanghailiang | 3119473 | 2015-03-13 16:08:38 +0800 | [diff] [blame] | 1097 | case MIGRATION_STATUS_ACTIVE: |
| 1098 | case MIGRATION_STATUS_CANCELLING: |
Dr. David Alan Gilbert | 9ec055a | 2015-11-05 18:10:58 +0000 | [diff] [blame] | 1099 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
Dr. David Alan Gilbert | 31e0607 | 2017-10-20 10:05:51 +0100 | [diff] [blame] | 1100 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
| 1101 | case MIGRATION_STATUS_DEVICE: |
Peter Xu | a688d2c | 2018-05-02 18:47:18 +0800 | [diff] [blame] | 1102 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
Peter Xu | 135b87b | 2018-05-02 18:47:25 +0800 | [diff] [blame] | 1103 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
Wei Yang | 640dfb1 | 2019-07-16 08:54:11 +0800 | [diff] [blame] | 1104 | /* TODO add some postcopy stats */ |
| 1105 | populate_time_info(info, s); |
Dr. David Alan Gilbert | a22463a | 2016-06-13 12:16:41 +0100 | [diff] [blame] | 1106 | populate_ram_info(info, s); |
Juan Quintela | 930ac04 | 2017-05-04 10:21:46 +0200 | [diff] [blame] | 1107 | populate_disk_info(info); |
Kirti Wankhede | 3710586 | 2020-10-26 15:06:27 +0530 | [diff] [blame] | 1108 | populate_vfio_info(info); |
Dr. David Alan Gilbert | 9ec055a | 2015-11-05 18:10:58 +0000 | [diff] [blame] | 1109 | break; |
zhanghailiang | 0b827d5 | 2016-10-27 14:42:54 +0800 | [diff] [blame] | 1110 | case MIGRATION_STATUS_COLO: |
| 1111 | info->has_status = true; |
| 1112 | /* TODO: display COLO specific information (checkpoint info etc.) */ |
| 1113 | break; |
zhanghailiang | 3119473 | 2015-03-13 16:08:38 +0800 | [diff] [blame] | 1114 | case MIGRATION_STATUS_COMPLETED: |
Wei Yang | 640dfb1 | 2019-07-16 08:54:11 +0800 | [diff] [blame] | 1115 | populate_time_info(info, s); |
Dr. David Alan Gilbert | a22463a | 2016-06-13 12:16:41 +0100 | [diff] [blame] | 1116 | populate_ram_info(info, s); |
Kirti Wankhede | 3710586 | 2020-10-26 15:06:27 +0530 | [diff] [blame] | 1117 | populate_vfio_info(info); |
Juan Quintela | 17549e8 | 2011-10-05 13:50:43 +0200 | [diff] [blame] | 1118 | break; |
zhanghailiang | 3119473 | 2015-03-13 16:08:38 +0800 | [diff] [blame] | 1119 | case MIGRATION_STATUS_FAILED: |
Luiz Capitulino | 791e7c8 | 2011-09-13 17:37:16 -0300 | [diff] [blame] | 1120 | info->has_status = true; |
Daniel P. Berrange | d59ce6f | 2016-04-27 11:05:00 +0100 | [diff] [blame] | 1121 | if (s->error) { |
| 1122 | info->has_error_desc = true; |
| 1123 | info->error_desc = g_strdup(error_get_pretty(s->error)); |
| 1124 | } |
Juan Quintela | 17549e8 | 2011-10-05 13:50:43 +0200 | [diff] [blame] | 1125 | break; |
zhanghailiang | 3119473 | 2015-03-13 16:08:38 +0800 | [diff] [blame] | 1126 | case MIGRATION_STATUS_CANCELLED: |
Luiz Capitulino | 791e7c8 | 2011-09-13 17:37:16 -0300 | [diff] [blame] | 1127 | info->has_status = true; |
Juan Quintela | 17549e8 | 2011-10-05 13:50:43 +0200 | [diff] [blame] | 1128 | break; |
Jens Freimann | c7e0acd | 2019-10-29 12:49:02 +0100 | [diff] [blame] | 1129 | case MIGRATION_STATUS_WAIT_UNPLUG: |
| 1130 | info->has_status = true; |
| 1131 | break; |
aliguori | 5bb7910 | 2008-10-13 03:12:02 +0000 | [diff] [blame] | 1132 | } |
zhanghailiang | cde63fb | 2015-03-13 16:08:41 +0800 | [diff] [blame] | 1133 | info->status = s->state; |
aliguori | 5bb7910 | 2008-10-13 03:12:02 +0000 | [diff] [blame] | 1134 | } |
| 1135 | |
Andrey Gruzdev | 6e8c25b | 2021-01-29 13:14:03 +0300 | [diff] [blame] | 1136 | typedef enum WriteTrackingSupport { |
| 1137 | WT_SUPPORT_UNKNOWN = 0, |
| 1138 | WT_SUPPORT_ABSENT, |
| 1139 | WT_SUPPORT_AVAILABLE, |
| 1140 | WT_SUPPORT_COMPATIBLE |
| 1141 | } WriteTrackingSupport; |
| 1142 | |
| 1143 | static |
| 1144 | WriteTrackingSupport migrate_query_write_tracking(void) |
| 1145 | { |
| 1146 | /* Check if kernel supports required UFFD features */ |
| 1147 | if (!ram_write_tracking_available()) { |
| 1148 | return WT_SUPPORT_ABSENT; |
| 1149 | } |
| 1150 | /* |
| 1151 | * Check if current memory configuration is |
| 1152 | * compatible with required UFFD features. |
| 1153 | */ |
| 1154 | if (!ram_write_tracking_compatible()) { |
| 1155 | return WT_SUPPORT_AVAILABLE; |
| 1156 | } |
| 1157 | |
| 1158 | return WT_SUPPORT_COMPATIBLE; |
| 1159 | } |
| 1160 | |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1161 | /** |
| 1162 | * @migration_caps_check - check capability validity |
| 1163 | * |
| 1164 | * @cap_list: old capability list, array of bool |
| 1165 | * @params: new capabilities to be applied soon |
| 1166 | * @errp: set *errp if the check failed, with reason |
| 1167 | * |
| 1168 | * Returns true if check passed, otherwise false. |
| 1169 | */ |
| 1170 | static bool migrate_caps_check(bool *cap_list, |
| 1171 | MigrationCapabilityStatusList *params, |
| 1172 | Error **errp) |
Orit Wasserman | 0045843 | 2012-08-06 21:42:48 +0300 | [diff] [blame] | 1173 | { |
Orit Wasserman | 0045843 | 2012-08-06 21:42:48 +0300 | [diff] [blame] | 1174 | MigrationCapabilityStatusList *cap; |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1175 | bool old_postcopy_cap; |
Alexey Perevalov | d7651f1 | 2017-09-19 19:47:56 +0300 | [diff] [blame] | 1176 | MigrationIncomingState *mis = migration_incoming_get_current(); |
Orit Wasserman | 0045843 | 2012-08-06 21:42:48 +0300 | [diff] [blame] | 1177 | |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1178 | old_postcopy_cap = cap_list[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
Orit Wasserman | 0045843 | 2012-08-06 21:42:48 +0300 | [diff] [blame] | 1179 | |
| 1180 | for (cap = params; cap; cap = cap->next) { |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1181 | cap_list[cap->value->capability] = cap->value->state; |
Orit Wasserman | 0045843 | 2012-08-06 21:42:48 +0300 | [diff] [blame] | 1182 | } |
Dr. David Alan Gilbert | 53dd370 | 2015-11-05 18:10:51 +0000 | [diff] [blame] | 1183 | |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1184 | #ifndef CONFIG_LIVE_BLOCK_MIGRATION |
| 1185 | if (cap_list[MIGRATION_CAPABILITY_BLOCK]) { |
| 1186 | error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) " |
| 1187 | "block migration"); |
| 1188 | error_append_hint(errp, "Use drive_mirror+NBD instead.\n"); |
| 1189 | return false; |
| 1190 | } |
| 1191 | #endif |
| 1192 | |
Zhang Chen | 7e934f5 | 2018-11-15 03:09:12 +0800 | [diff] [blame] | 1193 | #ifndef CONFIG_REPLICATION |
| 1194 | if (cap_list[MIGRATION_CAPABILITY_X_COLO]) { |
| 1195 | error_setg(errp, "QEMU compiled without replication module" |
| 1196 | " can't enable COLO"); |
| 1197 | error_append_hint(errp, "Please enable replication before COLO.\n"); |
| 1198 | return false; |
| 1199 | } |
| 1200 | #endif |
| 1201 | |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1202 | if (cap_list[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { |
Dr. David Alan Gilbert | 096631b | 2016-06-13 12:16:45 +0100 | [diff] [blame] | 1203 | /* This check is reasonably expensive, so only when it's being |
| 1204 | * set the first time, also it's only the destination that needs |
| 1205 | * special support. |
| 1206 | */ |
| 1207 | if (!old_postcopy_cap && runstate_check(RUN_STATE_INMIGRATE) && |
Alexey Perevalov | d7651f1 | 2017-09-19 19:47:56 +0300 | [diff] [blame] | 1208 | !postcopy_ram_supported_by_host(mis)) { |
Dr. David Alan Gilbert | 096631b | 2016-06-13 12:16:45 +0100 | [diff] [blame] | 1209 | /* postcopy_ram_supported_by_host will have emitted a more |
| 1210 | * detailed message |
| 1211 | */ |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1212 | error_setg(errp, "Postcopy is not supported"); |
| 1213 | return false; |
Dr. David Alan Gilbert | 096631b | 2016-06-13 12:16:45 +0100 | [diff] [blame] | 1214 | } |
Yury Kotov | 1826906 | 2019-02-15 20:45:45 +0300 | [diff] [blame] | 1215 | |
| 1216 | if (cap_list[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { |
| 1217 | error_setg(errp, "Postcopy is not compatible with ignore-shared"); |
| 1218 | return false; |
| 1219 | } |
Dr. David Alan Gilbert | 53dd370 | 2015-11-05 18:10:51 +0000 | [diff] [blame] | 1220 | } |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1221 | |
Andrey Gruzdev | 6e8c25b | 2021-01-29 13:14:03 +0300 | [diff] [blame] | 1222 | if (cap_list[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) { |
| 1223 | WriteTrackingSupport wt_support; |
| 1224 | int idx; |
| 1225 | /* |
| 1226 | * Check if 'background-snapshot' capability is supported by |
| 1227 | * host kernel and compatible with guest memory configuration. |
| 1228 | */ |
| 1229 | wt_support = migrate_query_write_tracking(); |
| 1230 | if (wt_support < WT_SUPPORT_AVAILABLE) { |
| 1231 | error_setg(errp, "Background-snapshot is not supported by host kernel"); |
| 1232 | return false; |
| 1233 | } |
| 1234 | if (wt_support < WT_SUPPORT_COMPATIBLE) { |
| 1235 | error_setg(errp, "Background-snapshot is not compatible " |
| 1236 | "with guest memory configuration"); |
| 1237 | return false; |
| 1238 | } |
| 1239 | |
| 1240 | /* |
| 1241 | * Check if there are any migration capabilities |
| 1242 | * incompatible with 'background-snapshot'. |
| 1243 | */ |
| 1244 | for (idx = 0; idx < check_caps_background_snapshot.size; idx++) { |
| 1245 | int incomp_cap = check_caps_background_snapshot.caps[idx]; |
| 1246 | if (cap_list[incomp_cap]) { |
| 1247 | error_setg(errp, |
| 1248 | "Background-snapshot is not compatible with %s", |
| 1249 | MigrationCapability_str(incomp_cap)); |
| 1250 | return false; |
| 1251 | } |
| 1252 | } |
| 1253 | } |
| 1254 | |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1255 | return true; |
| 1256 | } |
| 1257 | |
Alexey Perevalov | 65ace06 | 2018-03-22 21:17:27 +0300 | [diff] [blame] | 1258 | static void fill_destination_migration_info(MigrationInfo *info) |
| 1259 | { |
| 1260 | MigrationIncomingState *mis = migration_incoming_get_current(); |
| 1261 | |
Juan Quintela | 9aca82b | 2019-02-27 11:51:27 +0100 | [diff] [blame] | 1262 | if (mis->socket_address_list) { |
| 1263 | info->has_socket_address = true; |
| 1264 | info->socket_address = |
| 1265 | QAPI_CLONE(SocketAddressList, mis->socket_address_list); |
| 1266 | } |
| 1267 | |
Alexey Perevalov | 65ace06 | 2018-03-22 21:17:27 +0300 | [diff] [blame] | 1268 | switch (mis->state) { |
| 1269 | case MIGRATION_STATUS_NONE: |
| 1270 | return; |
Alexey Perevalov | 65ace06 | 2018-03-22 21:17:27 +0300 | [diff] [blame] | 1271 | case MIGRATION_STATUS_SETUP: |
| 1272 | case MIGRATION_STATUS_CANCELLING: |
| 1273 | case MIGRATION_STATUS_CANCELLED: |
| 1274 | case MIGRATION_STATUS_ACTIVE: |
| 1275 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
Peter Xu | 3c9928d | 2018-07-10 17:18:56 +0800 | [diff] [blame] | 1276 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
| 1277 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
Alexey Perevalov | 65ace06 | 2018-03-22 21:17:27 +0300 | [diff] [blame] | 1278 | case MIGRATION_STATUS_FAILED: |
| 1279 | case MIGRATION_STATUS_COLO: |
| 1280 | info->has_status = true; |
| 1281 | break; |
| 1282 | case MIGRATION_STATUS_COMPLETED: |
| 1283 | info->has_status = true; |
| 1284 | fill_destination_postcopy_migration_info(info); |
| 1285 | break; |
| 1286 | } |
| 1287 | info->status = mis->state; |
| 1288 | } |
| 1289 | |
| 1290 | MigrationInfo *qmp_query_migrate(Error **errp) |
| 1291 | { |
| 1292 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
| 1293 | |
| 1294 | fill_destination_migration_info(info); |
| 1295 | fill_source_migration_info(info); |
| 1296 | |
| 1297 | return info; |
| 1298 | } |
| 1299 | |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1300 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
| 1301 | Error **errp) |
| 1302 | { |
| 1303 | MigrationState *s = migrate_get_current(); |
| 1304 | MigrationCapabilityStatusList *cap; |
Peter Xu | dd0ee30 | 2018-03-05 17:49:38 +0800 | [diff] [blame] | 1305 | bool cap_list[MIGRATION_CAPABILITY__MAX]; |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1306 | |
Juan Quintela | 392d87e | 2020-01-21 15:39:23 +0100 | [diff] [blame] | 1307 | if (migration_is_running(s->state)) { |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1308 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
| 1309 | return; |
| 1310 | } |
| 1311 | |
Peter Xu | dd0ee30 | 2018-03-05 17:49:38 +0800 | [diff] [blame] | 1312 | memcpy(cap_list, s->enabled_capabilities, sizeof(cap_list)); |
| 1313 | if (!migrate_caps_check(cap_list, params, errp)) { |
Peter Xu | 4a84214 | 2017-07-18 11:39:08 +0800 | [diff] [blame] | 1314 | return; |
| 1315 | } |
| 1316 | |
| 1317 | for (cap = params; cap; cap = cap->next) { |
| 1318 | s->enabled_capabilities[cap->value->capability] = cap->value->state; |
| 1319 | } |
Orit Wasserman | 0045843 | 2012-08-06 21:42:48 +0300 | [diff] [blame] | 1320 | } |
| 1321 | |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1322 | /* |
| 1323 | * Check whether the parameters are valid. Error will be put into errp |
| 1324 | * (if provided). Return true if valid, otherwise false. |
| 1325 | */ |
| 1326 | static bool migrate_params_check(MigrationParameters *params, Error **errp) |
Liang Li | 85de832 | 2015-03-23 16:32:28 +0800 | [diff] [blame] | 1327 | { |
Eric Blake | 7f375e0 | 2016-09-08 22:14:16 -0500 | [diff] [blame] | 1328 | if (params->has_compress_level && |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 1329 | (params->compress_level > 9)) { |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 1330 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
Markus Armbruster | 54270c4 | 2021-02-02 15:17:34 +0100 | [diff] [blame] | 1331 | "a value between 0 and 9"); |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1332 | return false; |
Liang Li | 85de832 | 2015-03-23 16:32:28 +0800 | [diff] [blame] | 1333 | } |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1334 | |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 1335 | if (params->has_compress_threads && (params->compress_threads < 1)) { |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 1336 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| 1337 | "compress_threads", |
Markus Armbruster | 54270c4 | 2021-02-02 15:17:34 +0100 | [diff] [blame] | 1338 | "a value between 1 and 255"); |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1339 | return false; |
Liang Li | 85de832 | 2015-03-23 16:32:28 +0800 | [diff] [blame] | 1340 | } |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1341 | |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 1342 | if (params->has_decompress_threads && (params->decompress_threads < 1)) { |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 1343 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| 1344 | "decompress_threads", |
Markus Armbruster | 54270c4 | 2021-02-02 15:17:34 +0100 | [diff] [blame] | 1345 | "a value between 1 and 255"); |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1346 | return false; |
Liang Li | 85de832 | 2015-03-23 16:32:28 +0800 | [diff] [blame] | 1347 | } |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1348 | |
Keqian Zhu | dc14a47 | 2020-02-24 10:31:42 +0800 | [diff] [blame] | 1349 | if (params->has_throttle_trigger_threshold && |
| 1350 | (params->throttle_trigger_threshold < 1 || |
| 1351 | params->throttle_trigger_threshold > 100)) { |
| 1352 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| 1353 | "throttle_trigger_threshold", |
| 1354 | "an integer in the range of 1 to 100"); |
| 1355 | return false; |
| 1356 | } |
| 1357 | |
Eric Blake | 7f375e0 | 2016-09-08 22:14:16 -0500 | [diff] [blame] | 1358 | if (params->has_cpu_throttle_initial && |
| 1359 | (params->cpu_throttle_initial < 1 || |
| 1360 | params->cpu_throttle_initial > 99)) { |
Jason J. Herne | 1626fee | 2015-09-08 13:12:34 -0400 | [diff] [blame] | 1361 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
Jason J. Herne | d85a31d | 2016-04-21 14:07:18 -0400 | [diff] [blame] | 1362 | "cpu_throttle_initial", |
Jason J. Herne | 1626fee | 2015-09-08 13:12:34 -0400 | [diff] [blame] | 1363 | "an integer in the range of 1 to 99"); |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1364 | return false; |
Jason J. Herne | 1626fee | 2015-09-08 13:12:34 -0400 | [diff] [blame] | 1365 | } |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1366 | |
Eric Blake | 7f375e0 | 2016-09-08 22:14:16 -0500 | [diff] [blame] | 1367 | if (params->has_cpu_throttle_increment && |
| 1368 | (params->cpu_throttle_increment < 1 || |
| 1369 | params->cpu_throttle_increment > 99)) { |
Jason J. Herne | 1626fee | 2015-09-08 13:12:34 -0400 | [diff] [blame] | 1370 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
Jason J. Herne | d85a31d | 2016-04-21 14:07:18 -0400 | [diff] [blame] | 1371 | "cpu_throttle_increment", |
Jason J. Herne | 1626fee | 2015-09-08 13:12:34 -0400 | [diff] [blame] | 1372 | "an integer in the range of 1 to 99"); |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1373 | return false; |
Jason J. Herne | 1626fee | 2015-09-08 13:12:34 -0400 | [diff] [blame] | 1374 | } |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1375 | |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 1376 | if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { |
Mao Zhongyi | 2ee30cf | 2020-03-31 16:22:05 +0800 | [diff] [blame] | 1377 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| 1378 | "max_bandwidth", |
| 1379 | "an integer in the range of 0 to "stringify(SIZE_MAX) |
| 1380 | " bytes/second"); |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1381 | return false; |
Ashijeet Acharya | 2ff3025 | 2016-09-15 21:50:28 +0530 | [diff] [blame] | 1382 | } |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1383 | |
Ashijeet Acharya | 2ff3025 | 2016-09-15 21:50:28 +0530 | [diff] [blame] | 1384 | if (params->has_downtime_limit && |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 1385 | (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { |
Mao Zhongyi | 2ee30cf | 2020-03-31 16:22:05 +0800 | [diff] [blame] | 1386 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| 1387 | "downtime_limit", |
| 1388 | "an integer in the range of 0 to " |
Mao Zhongyi | 7ac5529 | 2020-03-31 16:22:07 +0800 | [diff] [blame] | 1389 | stringify(MAX_MIGRATE_DOWNTIME)" ms"); |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1390 | return false; |
Ashijeet Acharya | 2ff3025 | 2016-09-15 21:50:28 +0530 | [diff] [blame] | 1391 | } |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1392 | |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 1393 | /* x_checkpoint_delay is now always positive */ |
| 1394 | |
Juan Quintela | cbfd6c9 | 2019-02-06 13:54:06 +0100 | [diff] [blame] | 1395 | if (params->has_multifd_channels && (params->multifd_channels < 1)) { |
Juan Quintela | 4075fb1 | 2016-01-15 08:56:17 +0100 | [diff] [blame] | 1396 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| 1397 | "multifd_channels", |
Markus Armbruster | 54270c4 | 2021-02-02 15:17:34 +0100 | [diff] [blame] | 1398 | "a value between 1 and 255"); |
Juan Quintela | 4075fb1 | 2016-01-15 08:56:17 +0100 | [diff] [blame] | 1399 | return false; |
| 1400 | } |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1401 | |
Juan Quintela | 9004db4 | 2020-01-23 17:08:52 +0100 | [diff] [blame] | 1402 | if (params->has_multifd_zlib_level && |
| 1403 | (params->multifd_zlib_level > 9)) { |
| 1404 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", |
Markus Armbruster | 54270c4 | 2021-02-02 15:17:34 +0100 | [diff] [blame] | 1405 | "a value between 0 and 9"); |
Juan Quintela | 9004db4 | 2020-01-23 17:08:52 +0100 | [diff] [blame] | 1406 | return false; |
| 1407 | } |
| 1408 | |
Juan Quintela | 6a9ad15 | 2020-01-23 17:41:36 +0100 | [diff] [blame] | 1409 | if (params->has_multifd_zstd_level && |
| 1410 | (params->multifd_zstd_level > 20)) { |
| 1411 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", |
Markus Armbruster | 54270c4 | 2021-02-02 15:17:34 +0100 | [diff] [blame] | 1412 | "a value between 0 and 20"); |
Juan Quintela | 6a9ad15 | 2020-01-23 17:41:36 +0100 | [diff] [blame] | 1413 | return false; |
| 1414 | } |
| 1415 | |
Juan Quintela | 73af8dd | 2017-10-05 21:30:10 +0200 | [diff] [blame] | 1416 | if (params->has_xbzrle_cache_size && |
| 1417 | (params->xbzrle_cache_size < qemu_target_page_size() || |
| 1418 | !is_power_of_2(params->xbzrle_cache_size))) { |
| 1419 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| 1420 | "xbzrle_cache_size", |
Markus Armbruster | 54270c4 | 2021-02-02 15:17:34 +0100 | [diff] [blame] | 1421 | "a power of two no less than the target page size"); |
Juan Quintela | 73af8dd | 2017-10-05 21:30:10 +0200 | [diff] [blame] | 1422 | return false; |
| 1423 | } |
| 1424 | |
Li Qiang | 4cbc9c7 | 2018-08-01 06:00:20 -0700 | [diff] [blame] | 1425 | if (params->has_max_cpu_throttle && |
| 1426 | (params->max_cpu_throttle < params->cpu_throttle_initial || |
| 1427 | params->max_cpu_throttle > 99)) { |
| 1428 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| 1429 | "max_cpu_throttle", |
| 1430 | "an integer in the range of cpu_throttle_initial to 99"); |
| 1431 | return false; |
| 1432 | } |
| 1433 | |
Dr. David Alan Gilbert | ee3d96b | 2019-02-27 13:24:06 +0000 | [diff] [blame] | 1434 | if (params->has_announce_initial && |
| 1435 | params->announce_initial > 100000) { |
| 1436 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| 1437 | "announce_initial", |
Markus Armbruster | 54270c4 | 2021-02-02 15:17:34 +0100 | [diff] [blame] | 1438 | "a value between 0 and 100000"); |
Dr. David Alan Gilbert | ee3d96b | 2019-02-27 13:24:06 +0000 | [diff] [blame] | 1439 | return false; |
| 1440 | } |
| 1441 | if (params->has_announce_max && |
| 1442 | params->announce_max > 100000) { |
| 1443 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| 1444 | "announce_max", |
Markus Armbruster | 54270c4 | 2021-02-02 15:17:34 +0100 | [diff] [blame] | 1445 | "a value between 0 and 100000"); |
Dr. David Alan Gilbert | ee3d96b | 2019-02-27 13:24:06 +0000 | [diff] [blame] | 1446 | return false; |
| 1447 | } |
| 1448 | if (params->has_announce_rounds && |
| 1449 | params->announce_rounds > 1000) { |
| 1450 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| 1451 | "announce_rounds", |
Markus Armbruster | 54270c4 | 2021-02-02 15:17:34 +0100 | [diff] [blame] | 1452 | "a value between 0 and 1000"); |
Dr. David Alan Gilbert | ee3d96b | 2019-02-27 13:24:06 +0000 | [diff] [blame] | 1453 | return false; |
| 1454 | } |
| 1455 | if (params->has_announce_step && |
| 1456 | (params->announce_step < 1 || |
| 1457 | params->announce_step > 10000)) { |
| 1458 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| 1459 | "announce_step", |
Markus Armbruster | 54270c4 | 2021-02-02 15:17:34 +0100 | [diff] [blame] | 1460 | "a value between 0 and 10000"); |
Dr. David Alan Gilbert | ee3d96b | 2019-02-27 13:24:06 +0000 | [diff] [blame] | 1461 | return false; |
| 1462 | } |
Max Reitz | 31e4c35 | 2020-08-20 17:07:23 +0200 | [diff] [blame] | 1463 | |
| 1464 | if (params->has_block_bitmap_mapping && |
| 1465 | !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { |
| 1466 | error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); |
| 1467 | return false; |
| 1468 | } |
| 1469 | |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1470 | return true; |
| 1471 | } |
| 1472 | |
Markus Armbruster | 1bda8b3 | 2017-07-18 13:42:11 +0200 | [diff] [blame] | 1473 | static void migrate_params_test_apply(MigrateSetParameters *params, |
| 1474 | MigrationParameters *dest) |
| 1475 | { |
| 1476 | *dest = migrate_get_current()->parameters; |
| 1477 | |
| 1478 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
| 1479 | |
| 1480 | if (params->has_compress_level) { |
| 1481 | dest->compress_level = params->compress_level; |
| 1482 | } |
| 1483 | |
| 1484 | if (params->has_compress_threads) { |
| 1485 | dest->compress_threads = params->compress_threads; |
| 1486 | } |
| 1487 | |
Xiao Guangrong | 1d58872 | 2018-08-21 16:10:20 +0800 | [diff] [blame] | 1488 | if (params->has_compress_wait_thread) { |
| 1489 | dest->compress_wait_thread = params->compress_wait_thread; |
| 1490 | } |
| 1491 | |
Markus Armbruster | 1bda8b3 | 2017-07-18 13:42:11 +0200 | [diff] [blame] | 1492 | if (params->has_decompress_threads) { |
| 1493 | dest->decompress_threads = params->decompress_threads; |
| 1494 | } |
| 1495 | |
Keqian Zhu | dc14a47 | 2020-02-24 10:31:42 +0800 | [diff] [blame] | 1496 | if (params->has_throttle_trigger_threshold) { |
| 1497 | dest->throttle_trigger_threshold = params->throttle_trigger_threshold; |
| 1498 | } |
| 1499 | |
Markus Armbruster | 1bda8b3 | 2017-07-18 13:42:11 +0200 | [diff] [blame] | 1500 | if (params->has_cpu_throttle_initial) { |
| 1501 | dest->cpu_throttle_initial = params->cpu_throttle_initial; |
| 1502 | } |
| 1503 | |
| 1504 | if (params->has_cpu_throttle_increment) { |
| 1505 | dest->cpu_throttle_increment = params->cpu_throttle_increment; |
| 1506 | } |
| 1507 | |
Keqian Zhu | cbbf818 | 2020-04-13 18:15:08 +0800 | [diff] [blame] | 1508 | if (params->has_cpu_throttle_tailslow) { |
| 1509 | dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; |
| 1510 | } |
| 1511 | |
Markus Armbruster | 1bda8b3 | 2017-07-18 13:42:11 +0200 | [diff] [blame] | 1512 | if (params->has_tls_creds) { |
Markus Armbruster | 01fa559 | 2017-07-18 14:42:04 +0200 | [diff] [blame] | 1513 | assert(params->tls_creds->type == QTYPE_QSTRING); |
Zheng Chuan | 9728ebf | 2020-07-09 16:28:25 +0800 | [diff] [blame] | 1514 | dest->tls_creds = params->tls_creds->u.s; |
Markus Armbruster | 1bda8b3 | 2017-07-18 13:42:11 +0200 | [diff] [blame] | 1515 | } |
| 1516 | |
| 1517 | if (params->has_tls_hostname) { |
Markus Armbruster | 01fa559 | 2017-07-18 14:42:04 +0200 | [diff] [blame] | 1518 | assert(params->tls_hostname->type == QTYPE_QSTRING); |
Zheng Chuan | 9728ebf | 2020-07-09 16:28:25 +0800 | [diff] [blame] | 1519 | dest->tls_hostname = params->tls_hostname->u.s; |
Markus Armbruster | 1bda8b3 | 2017-07-18 13:42:11 +0200 | [diff] [blame] | 1520 | } |
| 1521 | |
| 1522 | if (params->has_max_bandwidth) { |
| 1523 | dest->max_bandwidth = params->max_bandwidth; |
| 1524 | } |
| 1525 | |
| 1526 | if (params->has_downtime_limit) { |
| 1527 | dest->downtime_limit = params->downtime_limit; |
| 1528 | } |
| 1529 | |
| 1530 | if (params->has_x_checkpoint_delay) { |
| 1531 | dest->x_checkpoint_delay = params->x_checkpoint_delay; |
| 1532 | } |
| 1533 | |
| 1534 | if (params->has_block_incremental) { |
| 1535 | dest->block_incremental = params->block_incremental; |
| 1536 | } |
Juan Quintela | cbfd6c9 | 2019-02-06 13:54:06 +0100 | [diff] [blame] | 1537 | if (params->has_multifd_channels) { |
| 1538 | dest->multifd_channels = params->multifd_channels; |
Juan Quintela | 5e7577a | 2017-10-09 18:07:56 +0200 | [diff] [blame] | 1539 | } |
Juan Quintela | 96eef04 | 2019-01-16 10:35:55 +0100 | [diff] [blame] | 1540 | if (params->has_multifd_compression) { |
| 1541 | dest->multifd_compression = params->multifd_compression; |
| 1542 | } |
Juan Quintela | 73af8dd | 2017-10-05 21:30:10 +0200 | [diff] [blame] | 1543 | if (params->has_xbzrle_cache_size) { |
| 1544 | dest->xbzrle_cache_size = params->xbzrle_cache_size; |
| 1545 | } |
Dr. David Alan Gilbert | 7e555c6 | 2018-06-13 11:26:40 +0100 | [diff] [blame] | 1546 | if (params->has_max_postcopy_bandwidth) { |
| 1547 | dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; |
| 1548 | } |
Li Qiang | 4cbc9c7 | 2018-08-01 06:00:20 -0700 | [diff] [blame] | 1549 | if (params->has_max_cpu_throttle) { |
| 1550 | dest->max_cpu_throttle = params->max_cpu_throttle; |
| 1551 | } |
Dr. David Alan Gilbert | ee3d96b | 2019-02-27 13:24:06 +0000 | [diff] [blame] | 1552 | if (params->has_announce_initial) { |
| 1553 | dest->announce_initial = params->announce_initial; |
| 1554 | } |
| 1555 | if (params->has_announce_max) { |
| 1556 | dest->announce_max = params->announce_max; |
| 1557 | } |
| 1558 | if (params->has_announce_rounds) { |
| 1559 | dest->announce_rounds = params->announce_rounds; |
| 1560 | } |
| 1561 | if (params->has_announce_step) { |
| 1562 | dest->announce_step = params->announce_step; |
| 1563 | } |
Max Reitz | 31e4c35 | 2020-08-20 17:07:23 +0200 | [diff] [blame] | 1564 | |
| 1565 | if (params->has_block_bitmap_mapping) { |
| 1566 | dest->has_block_bitmap_mapping = true; |
| 1567 | dest->block_bitmap_mapping = params->block_bitmap_mapping; |
| 1568 | } |
Markus Armbruster | 1bda8b3 | 2017-07-18 13:42:11 +0200 | [diff] [blame] | 1569 | } |
| 1570 | |
Juan Quintela | 73af8dd | 2017-10-05 21:30:10 +0200 | [diff] [blame] | 1571 | static void migrate_params_apply(MigrateSetParameters *params, Error **errp) |
Peter Xu | 16d063b | 2017-07-18 11:39:04 +0800 | [diff] [blame] | 1572 | { |
| 1573 | MigrationState *s = migrate_get_current(); |
| 1574 | |
Markus Armbruster | e87fae4 | 2017-07-18 12:57:38 +0200 | [diff] [blame] | 1575 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
| 1576 | |
Eric Blake | 7f375e0 | 2016-09-08 22:14:16 -0500 | [diff] [blame] | 1577 | if (params->has_compress_level) { |
| 1578 | s->parameters.compress_level = params->compress_level; |
Liang Li | 85de832 | 2015-03-23 16:32:28 +0800 | [diff] [blame] | 1579 | } |
Peter Xu | 476c72a | 2017-07-18 11:39:05 +0800 | [diff] [blame] | 1580 | |
Eric Blake | 7f375e0 | 2016-09-08 22:14:16 -0500 | [diff] [blame] | 1581 | if (params->has_compress_threads) { |
| 1582 | s->parameters.compress_threads = params->compress_threads; |
Liang Li | 85de832 | 2015-03-23 16:32:28 +0800 | [diff] [blame] | 1583 | } |
Peter Xu | 476c72a | 2017-07-18 11:39:05 +0800 | [diff] [blame] | 1584 | |
Xiao Guangrong | 1d58872 | 2018-08-21 16:10:20 +0800 | [diff] [blame] | 1585 | if (params->has_compress_wait_thread) { |
| 1586 | s->parameters.compress_wait_thread = params->compress_wait_thread; |
| 1587 | } |
| 1588 | |
Eric Blake | 7f375e0 | 2016-09-08 22:14:16 -0500 | [diff] [blame] | 1589 | if (params->has_decompress_threads) { |
| 1590 | s->parameters.decompress_threads = params->decompress_threads; |
Liang Li | 85de832 | 2015-03-23 16:32:28 +0800 | [diff] [blame] | 1591 | } |
Peter Xu | 476c72a | 2017-07-18 11:39:05 +0800 | [diff] [blame] | 1592 | |
Keqian Zhu | dc14a47 | 2020-02-24 10:31:42 +0800 | [diff] [blame] | 1593 | if (params->has_throttle_trigger_threshold) { |
| 1594 | s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; |
| 1595 | } |
| 1596 | |
Eric Blake | 7f375e0 | 2016-09-08 22:14:16 -0500 | [diff] [blame] | 1597 | if (params->has_cpu_throttle_initial) { |
| 1598 | s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; |
Jason J. Herne | 1626fee | 2015-09-08 13:12:34 -0400 | [diff] [blame] | 1599 | } |
Peter Xu | 476c72a | 2017-07-18 11:39:05 +0800 | [diff] [blame] | 1600 | |
Eric Blake | 7f375e0 | 2016-09-08 22:14:16 -0500 | [diff] [blame] | 1601 | if (params->has_cpu_throttle_increment) { |
| 1602 | s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; |
Jason J. Herne | 1626fee | 2015-09-08 13:12:34 -0400 | [diff] [blame] | 1603 | } |
Peter Xu | 476c72a | 2017-07-18 11:39:05 +0800 | [diff] [blame] | 1604 | |
Keqian Zhu | cbbf818 | 2020-04-13 18:15:08 +0800 | [diff] [blame] | 1605 | if (params->has_cpu_throttle_tailslow) { |
| 1606 | s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; |
| 1607 | } |
| 1608 | |
Eric Blake | 7f375e0 | 2016-09-08 22:14:16 -0500 | [diff] [blame] | 1609 | if (params->has_tls_creds) { |
Daniel P. Berrange | 69ef1f3 | 2016-04-27 11:05:15 +0100 | [diff] [blame] | 1610 | g_free(s->parameters.tls_creds); |
Markus Armbruster | 01fa559 | 2017-07-18 14:42:04 +0200 | [diff] [blame] | 1611 | assert(params->tls_creds->type == QTYPE_QSTRING); |
| 1612 | s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); |
Daniel P. Berrange | 69ef1f3 | 2016-04-27 11:05:15 +0100 | [diff] [blame] | 1613 | } |
Peter Xu | 476c72a | 2017-07-18 11:39:05 +0800 | [diff] [blame] | 1614 | |
Eric Blake | 7f375e0 | 2016-09-08 22:14:16 -0500 | [diff] [blame] | 1615 | if (params->has_tls_hostname) { |
Daniel P. Berrange | 69ef1f3 | 2016-04-27 11:05:15 +0100 | [diff] [blame] | 1616 | g_free(s->parameters.tls_hostname); |
Markus Armbruster | 01fa559 | 2017-07-18 14:42:04 +0200 | [diff] [blame] | 1617 | assert(params->tls_hostname->type == QTYPE_QSTRING); |
| 1618 | s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); |
Daniel P. Berrange | 69ef1f3 | 2016-04-27 11:05:15 +0100 | [diff] [blame] | 1619 | } |
Peter Xu | 476c72a | 2017-07-18 11:39:05 +0800 | [diff] [blame] | 1620 | |
Daniel P. Berrange | d2f1d29 | 2019-02-27 14:53:24 +0000 | [diff] [blame] | 1621 | if (params->has_tls_authz) { |
| 1622 | g_free(s->parameters.tls_authz); |
| 1623 | assert(params->tls_authz->type == QTYPE_QSTRING); |
| 1624 | s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); |
| 1625 | } |
| 1626 | |
Ashijeet Acharya | 2ff3025 | 2016-09-15 21:50:28 +0530 | [diff] [blame] | 1627 | if (params->has_max_bandwidth) { |
| 1628 | s->parameters.max_bandwidth = params->max_bandwidth; |
Dr. David Alan Gilbert | c38c1c1 | 2019-03-08 10:12:10 +0000 | [diff] [blame] | 1629 | if (s->to_dst_file && !migration_in_postcopy()) { |
Ashijeet Acharya | 2ff3025 | 2016-09-15 21:50:28 +0530 | [diff] [blame] | 1630 | qemu_file_set_rate_limit(s->to_dst_file, |
| 1631 | s->parameters.max_bandwidth / XFER_LIMIT_RATIO); |
| 1632 | } |
| 1633 | } |
Peter Xu | 476c72a | 2017-07-18 11:39:05 +0800 | [diff] [blame] | 1634 | |
Ashijeet Acharya | 2ff3025 | 2016-09-15 21:50:28 +0530 | [diff] [blame] | 1635 | if (params->has_downtime_limit) { |
| 1636 | s->parameters.downtime_limit = params->downtime_limit; |
| 1637 | } |
zhanghailiang | 68b5359 | 2016-10-27 14:43:01 +0800 | [diff] [blame] | 1638 | |
| 1639 | if (params->has_x_checkpoint_delay) { |
| 1640 | s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; |
zhanghailiang | 479125d | 2017-01-17 20:57:42 +0800 | [diff] [blame] | 1641 | if (migration_in_colo_state()) { |
| 1642 | colo_checkpoint_notify(s); |
| 1643 | } |
zhanghailiang | 68b5359 | 2016-10-27 14:43:01 +0800 | [diff] [blame] | 1644 | } |
Peter Xu | 476c72a | 2017-07-18 11:39:05 +0800 | [diff] [blame] | 1645 | |
Juan Quintela | 2833c59 | 2017-04-05 18:32:37 +0200 | [diff] [blame] | 1646 | if (params->has_block_incremental) { |
| 1647 | s->parameters.block_incremental = params->block_incremental; |
| 1648 | } |
Juan Quintela | cbfd6c9 | 2019-02-06 13:54:06 +0100 | [diff] [blame] | 1649 | if (params->has_multifd_channels) { |
| 1650 | s->parameters.multifd_channels = params->multifd_channels; |
Juan Quintela | 4075fb1 | 2016-01-15 08:56:17 +0100 | [diff] [blame] | 1651 | } |
Juan Quintela | 96eef04 | 2019-01-16 10:35:55 +0100 | [diff] [blame] | 1652 | if (params->has_multifd_compression) { |
| 1653 | s->parameters.multifd_compression = params->multifd_compression; |
| 1654 | } |
Juan Quintela | 73af8dd | 2017-10-05 21:30:10 +0200 | [diff] [blame] | 1655 | if (params->has_xbzrle_cache_size) { |
| 1656 | s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; |
| 1657 | xbzrle_cache_resize(params->xbzrle_cache_size, errp); |
| 1658 | } |
Dr. David Alan Gilbert | 7e555c6 | 2018-06-13 11:26:40 +0100 | [diff] [blame] | 1659 | if (params->has_max_postcopy_bandwidth) { |
| 1660 | s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; |
Dr. David Alan Gilbert | c38c1c1 | 2019-03-08 10:12:10 +0000 | [diff] [blame] | 1661 | if (s->to_dst_file && migration_in_postcopy()) { |
| 1662 | qemu_file_set_rate_limit(s->to_dst_file, |
| 1663 | s->parameters.max_postcopy_bandwidth / XFER_LIMIT_RATIO); |
| 1664 | } |
Dr. David Alan Gilbert | 7e555c6 | 2018-06-13 11:26:40 +0100 | [diff] [blame] | 1665 | } |
Li Qiang | 4cbc9c7 | 2018-08-01 06:00:20 -0700 | [diff] [blame] | 1666 | if (params->has_max_cpu_throttle) { |
| 1667 | s->parameters.max_cpu_throttle = params->max_cpu_throttle; |
| 1668 | } |
Dr. David Alan Gilbert | ee3d96b | 2019-02-27 13:24:06 +0000 | [diff] [blame] | 1669 | if (params->has_announce_initial) { |
| 1670 | s->parameters.announce_initial = params->announce_initial; |
| 1671 | } |
| 1672 | if (params->has_announce_max) { |
| 1673 | s->parameters.announce_max = params->announce_max; |
| 1674 | } |
| 1675 | if (params->has_announce_rounds) { |
| 1676 | s->parameters.announce_rounds = params->announce_rounds; |
| 1677 | } |
| 1678 | if (params->has_announce_step) { |
| 1679 | s->parameters.announce_step = params->announce_step; |
| 1680 | } |
Max Reitz | 31e4c35 | 2020-08-20 17:07:23 +0200 | [diff] [blame] | 1681 | |
| 1682 | if (params->has_block_bitmap_mapping) { |
| 1683 | qapi_free_BitmapMigrationNodeAliasList( |
| 1684 | s->parameters.block_bitmap_mapping); |
| 1685 | |
| 1686 | s->parameters.has_block_bitmap_mapping = true; |
| 1687 | s->parameters.block_bitmap_mapping = |
| 1688 | QAPI_CLONE(BitmapMigrationNodeAliasList, |
| 1689 | params->block_bitmap_mapping); |
| 1690 | } |
Liang Li | 85de832 | 2015-03-23 16:32:28 +0800 | [diff] [blame] | 1691 | } |
| 1692 | |
Markus Armbruster | 1bda8b3 | 2017-07-18 13:42:11 +0200 | [diff] [blame] | 1693 | void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) |
Peter Xu | 476c72a | 2017-07-18 11:39:05 +0800 | [diff] [blame] | 1694 | { |
Markus Armbruster | 1bda8b3 | 2017-07-18 13:42:11 +0200 | [diff] [blame] | 1695 | MigrationParameters tmp; |
| 1696 | |
Markus Armbruster | 01fa559 | 2017-07-18 14:42:04 +0200 | [diff] [blame] | 1697 | /* TODO Rewrite "" to null instead */ |
| 1698 | if (params->has_tls_creds |
| 1699 | && params->tls_creds->type == QTYPE_QNULL) { |
Marc-André Lureau | cb3e7f0 | 2018-04-19 17:01:43 +0200 | [diff] [blame] | 1700 | qobject_unref(params->tls_creds->u.n); |
Markus Armbruster | 01fa559 | 2017-07-18 14:42:04 +0200 | [diff] [blame] | 1701 | params->tls_creds->type = QTYPE_QSTRING; |
| 1702 | params->tls_creds->u.s = strdup(""); |
| 1703 | } |
| 1704 | /* TODO Rewrite "" to null instead */ |
| 1705 | if (params->has_tls_hostname |
| 1706 | && params->tls_hostname->type == QTYPE_QNULL) { |
Marc-André Lureau | cb3e7f0 | 2018-04-19 17:01:43 +0200 | [diff] [blame] | 1707 | qobject_unref(params->tls_hostname->u.n); |
Markus Armbruster | 01fa559 | 2017-07-18 14:42:04 +0200 | [diff] [blame] | 1708 | params->tls_hostname->type = QTYPE_QSTRING; |
| 1709 | params->tls_hostname->u.s = strdup(""); |
| 1710 | } |
| 1711 | |
Markus Armbruster | 1bda8b3 | 2017-07-18 13:42:11 +0200 | [diff] [blame] | 1712 | migrate_params_test_apply(params, &tmp); |
| 1713 | |
| 1714 | if (!migrate_params_check(&tmp, errp)) { |
Peter Xu | 476c72a | 2017-07-18 11:39:05 +0800 | [diff] [blame] | 1715 | /* Invalid parameter */ |
| 1716 | return; |
| 1717 | } |
| 1718 | |
Juan Quintela | 73af8dd | 2017-10-05 21:30:10 +0200 | [diff] [blame] | 1719 | migrate_params_apply(params, errp); |
Peter Xu | 476c72a | 2017-07-18 11:39:05 +0800 | [diff] [blame] | 1720 | } |
| 1721 | |
Daniel P. Berrange | 2594f56 | 2016-04-27 11:05:14 +0100 | [diff] [blame] | 1722 | |
Dr. David Alan Gilbert | 4886a1b | 2015-11-05 18:10:56 +0000 | [diff] [blame] | 1723 | void qmp_migrate_start_postcopy(Error **errp) |
| 1724 | { |
| 1725 | MigrationState *s = migrate_get_current(); |
| 1726 | |
Vladimir Sementsov-Ogievskiy | 16b0fd3 | 2018-03-13 15:34:01 -0400 | [diff] [blame] | 1727 | if (!migrate_postcopy()) { |
Dr. David Alan Gilbert | a54d340 | 2015-11-12 11:34:44 +0000 | [diff] [blame] | 1728 | error_setg(errp, "Enable postcopy with migrate_set_capability before" |
Dr. David Alan Gilbert | 4886a1b | 2015-11-05 18:10:56 +0000 | [diff] [blame] | 1729 | " the start of migration"); |
| 1730 | return; |
| 1731 | } |
| 1732 | |
| 1733 | if (s->state == MIGRATION_STATUS_NONE) { |
| 1734 | error_setg(errp, "Postcopy must be started after migration has been" |
| 1735 | " started"); |
| 1736 | return; |
| 1737 | } |
| 1738 | /* |
| 1739 | * we don't error if migration has finished since that would be racy |
| 1740 | * with issuing this command. |
| 1741 | */ |
Stefan Hajnoczi | d73415a | 2020-09-23 11:56:46 +0100 | [diff] [blame] | 1742 | qatomic_set(&s->start_postcopy, true); |
Dr. David Alan Gilbert | 4886a1b | 2015-11-05 18:10:56 +0000 | [diff] [blame] | 1743 | } |
| 1744 | |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 1745 | /* shared migration helpers */ |
| 1746 | |
zhanghailiang | 48781e5 | 2015-12-16 11:47:33 +0000 | [diff] [blame] | 1747 | void migrate_set_state(int *state, int old_state, int new_state) |
Zhanghaoyu (A) | 51cf4c1 | 2013-11-07 11:01:15 +0000 | [diff] [blame] | 1748 | { |
Peter Xu | a31fede | 2017-08-30 16:32:01 +0800 | [diff] [blame] | 1749 | assert(new_state < MIGRATION_STATUS__MAX); |
Stefan Hajnoczi | d73415a | 2020-09-23 11:56:46 +0100 | [diff] [blame] | 1750 | if (qatomic_cmpxchg(state, old_state, new_state) == old_state) { |
Peter Xu | a31fede | 2017-08-30 16:32:01 +0800 | [diff] [blame] | 1751 | trace_migrate_set_state(MigrationStatus_str(new_state)); |
Juan Quintela | b05dc72 | 2015-07-07 14:44:05 +0200 | [diff] [blame] | 1752 | migrate_generate_event(new_state); |
Zhanghaoyu (A) | 51cf4c1 | 2013-11-07 11:01:15 +0000 | [diff] [blame] | 1753 | } |
| 1754 | } |
| 1755 | |
Eric Blake | eaedde5 | 2020-11-12 19:13:36 -0600 | [diff] [blame] | 1756 | static MigrationCapabilityStatus *migrate_cap_add(MigrationCapability index, |
| 1757 | bool state) |
Juan Quintela | 2833c59 | 2017-04-05 18:32:37 +0200 | [diff] [blame] | 1758 | { |
Eric Blake | eaedde5 | 2020-11-12 19:13:36 -0600 | [diff] [blame] | 1759 | MigrationCapabilityStatus *cap; |
Juan Quintela | 2833c59 | 2017-04-05 18:32:37 +0200 | [diff] [blame] | 1760 | |
Eric Blake | eaedde5 | 2020-11-12 19:13:36 -0600 | [diff] [blame] | 1761 | cap = g_new0(MigrationCapabilityStatus, 1); |
| 1762 | cap->capability = index; |
| 1763 | cap->state = state; |
Peter Xu | 4e4a3d3 | 2017-07-18 11:39:09 +0800 | [diff] [blame] | 1764 | |
| 1765 | return cap; |
| 1766 | } |
| 1767 | |
| 1768 | void migrate_set_block_enabled(bool value, Error **errp) |
| 1769 | { |
Eric Blake | eaedde5 | 2020-11-12 19:13:36 -0600 | [diff] [blame] | 1770 | MigrationCapabilityStatusList *cap = NULL; |
Peter Xu | 4e4a3d3 | 2017-07-18 11:39:09 +0800 | [diff] [blame] | 1771 | |
Eric Blake | eaedde5 | 2020-11-12 19:13:36 -0600 | [diff] [blame] | 1772 | QAPI_LIST_PREPEND(cap, migrate_cap_add(MIGRATION_CAPABILITY_BLOCK, value)); |
Juan Quintela | 2833c59 | 2017-04-05 18:32:37 +0200 | [diff] [blame] | 1773 | qmp_migrate_set_capabilities(cap, errp); |
| 1774 | qapi_free_MigrationCapabilityStatusList(cap); |
| 1775 | } |
| 1776 | |
| 1777 | static void migrate_set_block_incremental(MigrationState *s, bool value) |
| 1778 | { |
| 1779 | s->parameters.block_incremental = value; |
| 1780 | } |
| 1781 | |
| 1782 | static void block_cleanup_parameters(MigrationState *s) |
| 1783 | { |
| 1784 | if (s->must_remove_block_options) { |
| 1785 | /* setting to false can never fail */ |
| 1786 | migrate_set_block_enabled(false, &error_abort); |
| 1787 | migrate_set_block_incremental(s, false); |
| 1788 | s->must_remove_block_options = false; |
| 1789 | } |
| 1790 | } |
| 1791 | |
Yury Kotov | fd392cf | 2019-04-08 14:33:43 +0300 | [diff] [blame] | 1792 | static void migrate_fd_cleanup(MigrationState *s) |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 1793 | { |
Paolo Bonzini | bb1fadc | 2013-02-22 17:36:21 +0100 | [diff] [blame] | 1794 | qemu_bh_delete(s->cleanup_bh); |
| 1795 | s->cleanup_bh = NULL; |
| 1796 | |
Peter Xu | 0ceccd8 | 2018-01-03 20:20:06 +0800 | [diff] [blame] | 1797 | qemu_savevm_state_cleanup(); |
| 1798 | |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 1799 | if (s->to_dst_file) { |
Peter Xu | 62df066 | 2018-05-02 18:47:38 +0800 | [diff] [blame] | 1800 | QEMUFile *tmp; |
Juan Quintela | f986c3d | 2016-01-14 16:52:55 +0100 | [diff] [blame] | 1801 | |
Alexey Kardashevskiy | 9013dca | 2014-03-11 10:42:29 +1100 | [diff] [blame] | 1802 | trace_migrate_fd_cleanup(); |
Paolo Bonzini | 404a7c0 | 2013-02-22 17:36:46 +0100 | [diff] [blame] | 1803 | qemu_mutex_unlock_iothread(); |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 1804 | if (s->migration_thread_running) { |
| 1805 | qemu_thread_join(&s->thread); |
| 1806 | s->migration_thread_running = false; |
| 1807 | } |
Paolo Bonzini | 404a7c0 | 2013-02-22 17:36:46 +0100 | [diff] [blame] | 1808 | qemu_mutex_lock_iothread(); |
| 1809 | |
Fei Li | 1398b2e | 2019-01-13 22:08:47 +0800 | [diff] [blame] | 1810 | multifd_save_cleanup(); |
Peter Xu | 62df066 | 2018-05-02 18:47:38 +0800 | [diff] [blame] | 1811 | qemu_mutex_lock(&s->qemu_file_lock); |
| 1812 | tmp = s->to_dst_file; |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 1813 | s->to_dst_file = NULL; |
Peter Xu | 62df066 | 2018-05-02 18:47:38 +0800 | [diff] [blame] | 1814 | qemu_mutex_unlock(&s->qemu_file_lock); |
| 1815 | /* |
| 1816 | * Close the file handle without the lock to make sure the |
| 1817 | * critical section won't block for long. |
| 1818 | */ |
| 1819 | qemu_fclose(tmp); |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 1820 | } |
| 1821 | |
Wei Yang | 8f8d528 | 2019-07-17 08:53:41 +0800 | [diff] [blame] | 1822 | assert(!migration_is_active(s)); |
Paolo Bonzini | 7a2c172 | 2013-02-22 17:36:09 +0100 | [diff] [blame] | 1823 | |
Liang Li | 94f5a43 | 2015-11-02 15:37:00 +0800 | [diff] [blame] | 1824 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
zhanghailiang | 48781e5 | 2015-12-16 11:47:33 +0000 | [diff] [blame] | 1825 | migrate_set_state(&s->state, MIGRATION_STATUS_CANCELLING, |
Liang Li | 94f5a43 | 2015-11-02 15:37:00 +0800 | [diff] [blame] | 1826 | MIGRATION_STATUS_CANCELLED); |
Paolo Bonzini | 7a2c172 | 2013-02-22 17:36:09 +0100 | [diff] [blame] | 1827 | } |
Paolo Bonzini | a3fa1d7 | 2013-02-22 17:36:18 +0100 | [diff] [blame] | 1828 | |
Juan Quintela | 87db1a7 | 2017-09-05 12:50:22 +0200 | [diff] [blame] | 1829 | if (s->error) { |
| 1830 | /* It is used on info migrate. We can't free it */ |
| 1831 | error_report_err(error_copy(s->error)); |
| 1832 | } |
Paolo Bonzini | a3fa1d7 | 2013-02-22 17:36:18 +0100 | [diff] [blame] | 1833 | notifier_list_notify(&migration_state_notifiers, s); |
Juan Quintela | 2833c59 | 2017-04-05 18:32:37 +0200 | [diff] [blame] | 1834 | block_cleanup_parameters(s); |
Lukas Straub | b5eea99 | 2020-12-28 16:08:52 +0100 | [diff] [blame] | 1835 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 1836 | } |
| 1837 | |
Yury Kotov | fd392cf | 2019-04-08 14:33:43 +0300 | [diff] [blame] | 1838 | static void migrate_fd_cleanup_schedule(MigrationState *s) |
| 1839 | { |
| 1840 | /* |
| 1841 | * Ref the state for bh, because it may be called when |
| 1842 | * there're already no other refs |
| 1843 | */ |
| 1844 | object_ref(OBJECT(s)); |
| 1845 | qemu_bh_schedule(s->cleanup_bh); |
| 1846 | } |
| 1847 | |
| 1848 | static void migrate_fd_cleanup_bh(void *opaque) |
| 1849 | { |
| 1850 | MigrationState *s = opaque; |
| 1851 | migrate_fd_cleanup(s); |
| 1852 | object_unref(OBJECT(s)); |
| 1853 | } |
| 1854 | |
Juan Quintela | 87db1a7 | 2017-09-05 12:50:22 +0200 | [diff] [blame] | 1855 | void migrate_set_error(MigrationState *s, const Error *error) |
| 1856 | { |
Daniel Brodsky | 6e8a355 | 2020-04-03 21:21:08 -0700 | [diff] [blame] | 1857 | QEMU_LOCK_GUARD(&s->error_mutex); |
Juan Quintela | 87db1a7 | 2017-09-05 12:50:22 +0200 | [diff] [blame] | 1858 | if (!s->error) { |
| 1859 | s->error = error_copy(error); |
| 1860 | } |
Juan Quintela | 87db1a7 | 2017-09-05 12:50:22 +0200 | [diff] [blame] | 1861 | } |
| 1862 | |
Daniel P. Berrange | d59ce6f | 2016-04-27 11:05:00 +0100 | [diff] [blame] | 1863 | void migrate_fd_error(MigrationState *s, const Error *error) |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 1864 | { |
Peter Maydell | 2517405 | 2016-10-21 18:41:45 +0100 | [diff] [blame] | 1865 | trace_migrate_fd_error(error_get_pretty(error)); |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 1866 | assert(s->to_dst_file == NULL); |
zhanghailiang | 48781e5 | 2015-12-16 11:47:33 +0000 | [diff] [blame] | 1867 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
| 1868 | MIGRATION_STATUS_FAILED); |
Juan Quintela | 87db1a7 | 2017-09-05 12:50:22 +0200 | [diff] [blame] | 1869 | migrate_set_error(s, error); |
Juan Quintela | 458cf28 | 2011-02-22 23:32:54 +0100 | [diff] [blame] | 1870 | } |
| 1871 | |
Juan Quintela | 0edda1c | 2010-05-11 16:28:39 +0200 | [diff] [blame] | 1872 | static void migrate_fd_cancel(MigrationState *s) |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 1873 | { |
Zhanghaoyu (A) | 6f2b811 | 2013-11-07 08:21:23 +0000 | [diff] [blame] | 1874 | int old_state ; |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 1875 | QEMUFile *f = migrate_get_current()->to_dst_file; |
Alexey Kardashevskiy | 9013dca | 2014-03-11 10:42:29 +1100 | [diff] [blame] | 1876 | trace_migrate_fd_cancel(); |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 1877 | |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 1878 | if (s->rp_state.from_dst_file) { |
| 1879 | /* shutdown the rp socket, so causing the rp thread to shutdown */ |
| 1880 | qemu_file_shutdown(s->rp_state.from_dst_file); |
| 1881 | } |
| 1882 | |
Zhanghaoyu (A) | 6f2b811 | 2013-11-07 08:21:23 +0000 | [diff] [blame] | 1883 | do { |
| 1884 | old_state = s->state; |
Juan Quintela | 392d87e | 2020-01-21 15:39:23 +0100 | [diff] [blame] | 1885 | if (!migration_is_running(old_state)) { |
Zhanghaoyu (A) | 6f2b811 | 2013-11-07 08:21:23 +0000 | [diff] [blame] | 1886 | break; |
| 1887 | } |
Dr. David Alan Gilbert | a7b36b4 | 2017-10-20 10:05:55 +0100 | [diff] [blame] | 1888 | /* If the migration is paused, kick it out of the pause */ |
| 1889 | if (old_state == MIGRATION_STATUS_PRE_SWITCHOVER) { |
| 1890 | qemu_sem_post(&s->pause_sem); |
| 1891 | } |
zhanghailiang | 48781e5 | 2015-12-16 11:47:33 +0000 | [diff] [blame] | 1892 | migrate_set_state(&s->state, old_state, MIGRATION_STATUS_CANCELLING); |
zhanghailiang | 3119473 | 2015-03-13 16:08:38 +0800 | [diff] [blame] | 1893 | } while (s->state != MIGRATION_STATUS_CANCELLING); |
Dr. David Alan Gilbert | a26ba26 | 2015-01-08 11:11:32 +0000 | [diff] [blame] | 1894 | |
| 1895 | /* |
| 1896 | * If we're unlucky the migration code might be stuck somewhere in a |
| 1897 | * send/write while the network has failed and is waiting to timeout; |
| 1898 | * if we've got shutdown(2) available then we can force it to quit. |
| 1899 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is |
| 1900 | * called in a bh, so there is no race against this cancel. |
| 1901 | */ |
zhanghailiang | 3119473 | 2015-03-13 16:08:38 +0800 | [diff] [blame] | 1902 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
Dr. David Alan Gilbert | a26ba26 | 2015-01-08 11:11:32 +0000 | [diff] [blame] | 1903 | qemu_file_shutdown(f); |
| 1904 | } |
zhanghailiang | 1d2acc3 | 2017-01-24 15:59:52 +0800 | [diff] [blame] | 1905 | if (s->state == MIGRATION_STATUS_CANCELLING && s->block_inactive) { |
| 1906 | Error *local_err = NULL; |
| 1907 | |
| 1908 | bdrv_invalidate_cache_all(&local_err); |
| 1909 | if (local_err) { |
| 1910 | error_report_err(local_err); |
| 1911 | } else { |
| 1912 | s->block_inactive = false; |
| 1913 | } |
| 1914 | } |
aliguori | 065e281 | 2008-11-11 16:46:33 +0000 | [diff] [blame] | 1915 | } |
| 1916 | |
Gerd Hoffmann | 99a0db9 | 2010-12-13 17:30:12 +0100 | [diff] [blame] | 1917 | void add_migration_state_change_notifier(Notifier *notify) |
| 1918 | { |
| 1919 | notifier_list_add(&migration_state_notifiers, notify); |
| 1920 | } |
| 1921 | |
| 1922 | void remove_migration_state_change_notifier(Notifier *notify) |
| 1923 | { |
Paolo Bonzini | 3155252 | 2012-01-13 17:34:01 +0100 | [diff] [blame] | 1924 | notifier_remove(notify); |
Gerd Hoffmann | 99a0db9 | 2010-12-13 17:30:12 +0100 | [diff] [blame] | 1925 | } |
| 1926 | |
Stefan Hajnoczi | 02edd2e | 2013-07-29 15:01:58 +0200 | [diff] [blame] | 1927 | bool migration_in_setup(MigrationState *s) |
Gerd Hoffmann | afe2df6 | 2011-10-25 13:50:11 +0200 | [diff] [blame] | 1928 | { |
zhanghailiang | 3119473 | 2015-03-13 16:08:38 +0800 | [diff] [blame] | 1929 | return s->state == MIGRATION_STATUS_SETUP; |
Gerd Hoffmann | afe2df6 | 2011-10-25 13:50:11 +0200 | [diff] [blame] | 1930 | } |
| 1931 | |
Juan Quintela | 7073693 | 2011-02-23 00:43:59 +0100 | [diff] [blame] | 1932 | bool migration_has_finished(MigrationState *s) |
Gerd Hoffmann | 99a0db9 | 2010-12-13 17:30:12 +0100 | [diff] [blame] | 1933 | { |
zhanghailiang | 3119473 | 2015-03-13 16:08:38 +0800 | [diff] [blame] | 1934 | return s->state == MIGRATION_STATUS_COMPLETED; |
Gerd Hoffmann | 99a0db9 | 2010-12-13 17:30:12 +0100 | [diff] [blame] | 1935 | } |
Juan Quintela | 0edda1c | 2010-05-11 16:28:39 +0200 | [diff] [blame] | 1936 | |
Gerd Hoffmann | afe2df6 | 2011-10-25 13:50:11 +0200 | [diff] [blame] | 1937 | bool migration_has_failed(MigrationState *s) |
| 1938 | { |
zhanghailiang | 3119473 | 2015-03-13 16:08:38 +0800 | [diff] [blame] | 1939 | return (s->state == MIGRATION_STATUS_CANCELLED || |
| 1940 | s->state == MIGRATION_STATUS_FAILED); |
Gerd Hoffmann | afe2df6 | 2011-10-25 13:50:11 +0200 | [diff] [blame] | 1941 | } |
| 1942 | |
Juan Quintela | 5727309 | 2017-03-20 22:25:28 +0100 | [diff] [blame] | 1943 | bool migration_in_postcopy(void) |
Dr. David Alan Gilbert | 9ec055a | 2015-11-05 18:10:58 +0000 | [diff] [blame] | 1944 | { |
Juan Quintela | 5727309 | 2017-03-20 22:25:28 +0100 | [diff] [blame] | 1945 | MigrationState *s = migrate_get_current(); |
| 1946 | |
Dr. David Alan Gilbert | 3748fef | 2019-09-23 18:49:42 +0100 | [diff] [blame] | 1947 | switch (s->state) { |
| 1948 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
| 1949 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
| 1950 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
| 1951 | return true; |
| 1952 | default: |
| 1953 | return false; |
| 1954 | } |
Dr. David Alan Gilbert | 9ec055a | 2015-11-05 18:10:58 +0000 | [diff] [blame] | 1955 | } |
| 1956 | |
Dr. David Alan Gilbert | b82fc32 | 2016-02-22 17:17:32 +0000 | [diff] [blame] | 1957 | bool migration_in_postcopy_after_devices(MigrationState *s) |
| 1958 | { |
Juan Quintela | 5727309 | 2017-03-20 22:25:28 +0100 | [diff] [blame] | 1959 | return migration_in_postcopy() && s->postcopy_after_devices; |
Dr. David Alan Gilbert | b82fc32 | 2016-02-22 17:17:32 +0000 | [diff] [blame] | 1960 | } |
| 1961 | |
David Hildenbrand | 06df2e6 | 2020-06-26 09:22:33 +0200 | [diff] [blame] | 1962 | bool migration_in_incoming_postcopy(void) |
| 1963 | { |
| 1964 | PostcopyState ps = postcopy_state_get(); |
| 1965 | |
| 1966 | return ps >= POSTCOPY_INCOMING_DISCARD && ps < POSTCOPY_INCOMING_END; |
| 1967 | } |
| 1968 | |
Andrey Gruzdev | 1a8e44a | 2021-04-01 12:22:24 +0300 | [diff] [blame] | 1969 | bool migration_in_bg_snapshot(void) |
| 1970 | { |
| 1971 | MigrationState *s = migrate_get_current(); |
| 1972 | |
| 1973 | return migrate_background_snapshot() && |
| 1974 | migration_is_setup_or_active(s->state); |
| 1975 | } |
| 1976 | |
Juan Quintela | fab3500 | 2017-03-22 17:36:57 +0100 | [diff] [blame] | 1977 | bool migration_is_idle(void) |
Ashijeet Acharya | fe44dc9 | 2017-01-16 17:01:53 +0530 | [diff] [blame] | 1978 | { |
Markus Armbruster | daff7f0 | 2019-04-01 11:08:25 +0200 | [diff] [blame] | 1979 | MigrationState *s = current_migration; |
| 1980 | |
| 1981 | if (!s) { |
| 1982 | return true; |
| 1983 | } |
Ashijeet Acharya | fe44dc9 | 2017-01-16 17:01:53 +0530 | [diff] [blame] | 1984 | |
| 1985 | switch (s->state) { |
| 1986 | case MIGRATION_STATUS_NONE: |
| 1987 | case MIGRATION_STATUS_CANCELLED: |
| 1988 | case MIGRATION_STATUS_COMPLETED: |
| 1989 | case MIGRATION_STATUS_FAILED: |
| 1990 | return true; |
| 1991 | case MIGRATION_STATUS_SETUP: |
| 1992 | case MIGRATION_STATUS_CANCELLING: |
| 1993 | case MIGRATION_STATUS_ACTIVE: |
| 1994 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
| 1995 | case MIGRATION_STATUS_COLO: |
Dr. David Alan Gilbert | 31e0607 | 2017-10-20 10:05:51 +0100 | [diff] [blame] | 1996 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
| 1997 | case MIGRATION_STATUS_DEVICE: |
Jens Freimann | c7e0acd | 2019-10-29 12:49:02 +0100 | [diff] [blame] | 1998 | case MIGRATION_STATUS_WAIT_UNPLUG: |
Ashijeet Acharya | fe44dc9 | 2017-01-16 17:01:53 +0530 | [diff] [blame] | 1999 | return false; |
| 2000 | case MIGRATION_STATUS__MAX: |
| 2001 | g_assert_not_reached(); |
| 2002 | } |
| 2003 | |
| 2004 | return false; |
| 2005 | } |
| 2006 | |
Wei Yang | 8f8d528 | 2019-07-17 08:53:41 +0800 | [diff] [blame] | 2007 | bool migration_is_active(MigrationState *s) |
| 2008 | { |
| 2009 | return (s->state == MIGRATION_STATUS_ACTIVE || |
| 2010 | s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); |
| 2011 | } |
| 2012 | |
Peter Xu | 3e0c805 | 2018-02-08 18:31:15 +0800 | [diff] [blame] | 2013 | void migrate_init(MigrationState *s) |
Juan Quintela | 0edda1c | 2010-05-11 16:28:39 +0200 | [diff] [blame] | 2014 | { |
Dr. David Alan Gilbert | 389775d | 2015-11-12 15:38:27 +0000 | [diff] [blame] | 2015 | /* |
| 2016 | * Reinitialise all migration state, except |
| 2017 | * parameters/capabilities that the user set, and |
| 2018 | * locks. |
| 2019 | */ |
Dr. David Alan Gilbert | 389775d | 2015-11-12 15:38:27 +0000 | [diff] [blame] | 2020 | s->cleanup_bh = 0; |
Andrey Gruzdev | 8518278 | 2021-01-29 13:14:06 +0300 | [diff] [blame] | 2021 | s->vm_start_bh = 0; |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 2022 | s->to_dst_file = NULL; |
Dr. David Alan Gilbert | 389775d | 2015-11-12 15:38:27 +0000 | [diff] [blame] | 2023 | s->state = MIGRATION_STATUS_NONE; |
Dr. David Alan Gilbert | 389775d | 2015-11-12 15:38:27 +0000 | [diff] [blame] | 2024 | s->rp_state.from_dst_file = NULL; |
| 2025 | s->rp_state.error = false; |
| 2026 | s->mbps = 0.0; |
Xiao Guangrong | aecbfe9 | 2019-01-11 14:37:30 +0800 | [diff] [blame] | 2027 | s->pages_per_second = 0.0; |
Dr. David Alan Gilbert | 389775d | 2015-11-12 15:38:27 +0000 | [diff] [blame] | 2028 | s->downtime = 0; |
| 2029 | s->expected_downtime = 0; |
Dr. David Alan Gilbert | 389775d | 2015-11-12 15:38:27 +0000 | [diff] [blame] | 2030 | s->setup_time = 0; |
Dr. David Alan Gilbert | 389775d | 2015-11-12 15:38:27 +0000 | [diff] [blame] | 2031 | s->start_postcopy = false; |
Dr. David Alan Gilbert | b82fc32 | 2016-02-22 17:17:32 +0000 | [diff] [blame] | 2032 | s->postcopy_after_devices = false; |
Dr. David Alan Gilbert | 389775d | 2015-11-12 15:38:27 +0000 | [diff] [blame] | 2033 | s->migration_thread_running = false; |
Daniel P. Berrange | d59ce6f | 2016-04-27 11:05:00 +0100 | [diff] [blame] | 2034 | error_free(s->error); |
| 2035 | s->error = NULL; |
Chuan Zheng | d8053e7 | 2020-09-15 11:03:57 +0800 | [diff] [blame] | 2036 | s->hostname = NULL; |
Juan Quintela | 1299c63 | 2011-11-09 21:29:01 +0100 | [diff] [blame] | 2037 | |
zhanghailiang | 48781e5 | 2015-12-16 11:47:33 +0000 | [diff] [blame] | 2038 | migrate_set_state(&s->state, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP); |
Juan Quintela | 0edda1c | 2010-05-11 16:28:39 +0200 | [diff] [blame] | 2039 | |
Peter Xu | 4af246a | 2018-01-03 20:20:08 +0800 | [diff] [blame] | 2040 | s->start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
| 2041 | s->total_time = 0; |
Peter Xu | 7287cbd | 2018-01-03 20:20:09 +0800 | [diff] [blame] | 2042 | s->vm_was_running = false; |
Peter Xu | b15df1a | 2018-01-03 20:20:13 +0800 | [diff] [blame] | 2043 | s->iteration_initial_bytes = 0; |
| 2044 | s->threshold_size = 0; |
Juan Quintela | 0edda1c | 2010-05-11 16:28:39 +0200 | [diff] [blame] | 2045 | } |
Juan Quintela | cab3014 | 2011-02-22 23:54:21 +0100 | [diff] [blame] | 2046 | |
Ashijeet Acharya | fe44dc9 | 2017-01-16 17:01:53 +0530 | [diff] [blame] | 2047 | int migrate_add_blocker(Error *reason, Error **errp) |
Anthony Liguori | fa2756b | 2011-11-14 15:09:43 -0600 | [diff] [blame] | 2048 | { |
Markus Armbruster | 811f865 | 2019-04-01 11:08:24 +0200 | [diff] [blame] | 2049 | if (only_migratable) { |
Markus Armbruster | 4b57664 | 2018-10-17 10:26:25 +0200 | [diff] [blame] | 2050 | error_propagate_prepend(errp, error_copy(reason), |
| 2051 | "disallowing migration blocker " |
Greg Kurz | b6eca81 | 2019-05-16 12:58:05 +0200 | [diff] [blame] | 2052 | "(--only-migratable) for: "); |
Ashijeet Acharya | b67b8c3 | 2017-01-16 17:01:54 +0530 | [diff] [blame] | 2053 | return -EACCES; |
| 2054 | } |
| 2055 | |
Juan Quintela | fab3500 | 2017-03-22 17:36:57 +0100 | [diff] [blame] | 2056 | if (migration_is_idle()) { |
Ashijeet Acharya | fe44dc9 | 2017-01-16 17:01:53 +0530 | [diff] [blame] | 2057 | migration_blockers = g_slist_prepend(migration_blockers, reason); |
| 2058 | return 0; |
| 2059 | } |
| 2060 | |
Markus Armbruster | 4b57664 | 2018-10-17 10:26:25 +0200 | [diff] [blame] | 2061 | error_propagate_prepend(errp, error_copy(reason), |
| 2062 | "disallowing migration blocker " |
| 2063 | "(migration in progress) for: "); |
Ashijeet Acharya | fe44dc9 | 2017-01-16 17:01:53 +0530 | [diff] [blame] | 2064 | return -EBUSY; |
Anthony Liguori | fa2756b | 2011-11-14 15:09:43 -0600 | [diff] [blame] | 2065 | } |
| 2066 | |
| 2067 | void migrate_del_blocker(Error *reason) |
| 2068 | { |
| 2069 | migration_blockers = g_slist_remove(migration_blockers, reason); |
| 2070 | } |
| 2071 | |
Dr. David Alan Gilbert | bf1ae1f | 2015-02-19 11:40:28 +0000 | [diff] [blame] | 2072 | void qmp_migrate_incoming(const char *uri, Error **errp) |
| 2073 | { |
| 2074 | Error *local_err = NULL; |
Dr. David Alan Gilbert | 4debb5f | 2015-02-26 14:54:41 +0000 | [diff] [blame] | 2075 | static bool once = true; |
Dr. David Alan Gilbert | bf1ae1f | 2015-02-19 11:40:28 +0000 | [diff] [blame] | 2076 | |
Dr. David Alan Gilbert | 4debb5f | 2015-02-26 14:54:41 +0000 | [diff] [blame] | 2077 | if (!once) { |
| 2078 | error_setg(errp, "The incoming migration has already been started"); |
Yury Kotov | 603d5a4 | 2019-11-13 20:53:25 +0300 | [diff] [blame] | 2079 | return; |
Dr. David Alan Gilbert | 4debb5f | 2015-02-26 14:54:41 +0000 | [diff] [blame] | 2080 | } |
Paolo Bonzini | e69d50d | 2020-10-27 04:22:57 -0400 | [diff] [blame] | 2081 | if (!runstate_check(RUN_STATE_INMIGRATE)) { |
| 2082 | error_setg(errp, "'-incoming' was not specified on the command line"); |
| 2083 | return; |
| 2084 | } |
Dr. David Alan Gilbert | bf1ae1f | 2015-02-19 11:40:28 +0000 | [diff] [blame] | 2085 | |
| 2086 | qemu_start_incoming_migration(uri, &local_err); |
| 2087 | |
| 2088 | if (local_err) { |
| 2089 | error_propagate(errp, local_err); |
| 2090 | return; |
| 2091 | } |
| 2092 | |
Dr. David Alan Gilbert | 4debb5f | 2015-02-26 14:54:41 +0000 | [diff] [blame] | 2093 | once = false; |
Dr. David Alan Gilbert | bf1ae1f | 2015-02-19 11:40:28 +0000 | [diff] [blame] | 2094 | } |
| 2095 | |
Peter Xu | 02affd4 | 2018-05-02 18:47:36 +0800 | [diff] [blame] | 2096 | void qmp_migrate_recover(const char *uri, Error **errp) |
| 2097 | { |
| 2098 | MigrationIncomingState *mis = migration_incoming_get_current(); |
| 2099 | |
| 2100 | if (mis->state != MIGRATION_STATUS_POSTCOPY_PAUSED) { |
| 2101 | error_setg(errp, "Migrate recover can only be run " |
| 2102 | "when postcopy is paused."); |
| 2103 | return; |
| 2104 | } |
| 2105 | |
Stefan Hajnoczi | d73415a | 2020-09-23 11:56:46 +0100 | [diff] [blame] | 2106 | if (qatomic_cmpxchg(&mis->postcopy_recover_triggered, |
Peter Xu | 02affd4 | 2018-05-02 18:47:36 +0800 | [diff] [blame] | 2107 | false, true) == true) { |
| 2108 | error_setg(errp, "Migrate recovery is triggered already"); |
| 2109 | return; |
| 2110 | } |
| 2111 | |
| 2112 | /* |
| 2113 | * Note that this call will never start a real migration; it will |
| 2114 | * only re-setup the migration stream and poke existing migration |
| 2115 | * to continue using that newly established channel. |
| 2116 | */ |
Lukas Straub | b5eea99 | 2020-12-28 16:08:52 +0100 | [diff] [blame] | 2117 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); |
Peter Xu | 02affd4 | 2018-05-02 18:47:36 +0800 | [diff] [blame] | 2118 | qemu_start_incoming_migration(uri, errp); |
| 2119 | } |
| 2120 | |
Peter Xu | bfbf89c | 2018-05-02 18:47:39 +0800 | [diff] [blame] | 2121 | void qmp_migrate_pause(Error **errp) |
| 2122 | { |
| 2123 | MigrationState *ms = migrate_get_current(); |
| 2124 | MigrationIncomingState *mis = migration_incoming_get_current(); |
| 2125 | int ret; |
| 2126 | |
| 2127 | if (ms->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { |
| 2128 | /* Source side, during postcopy */ |
| 2129 | qemu_mutex_lock(&ms->qemu_file_lock); |
| 2130 | ret = qemu_file_shutdown(ms->to_dst_file); |
| 2131 | qemu_mutex_unlock(&ms->qemu_file_lock); |
| 2132 | if (ret) { |
| 2133 | error_setg(errp, "Failed to pause source migration"); |
| 2134 | } |
| 2135 | return; |
| 2136 | } |
| 2137 | |
| 2138 | if (mis->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { |
| 2139 | ret = qemu_file_shutdown(mis->from_src_file); |
| 2140 | if (ret) { |
| 2141 | error_setg(errp, "Failed to pause destination migration"); |
| 2142 | } |
| 2143 | return; |
| 2144 | } |
| 2145 | |
| 2146 | error_setg(errp, "migrate-pause is currently only supported " |
| 2147 | "during postcopy-active state"); |
| 2148 | } |
| 2149 | |
Greg Kurz | 24f3902 | 2016-05-04 21:44:19 +0200 | [diff] [blame] | 2150 | bool migration_is_blocked(Error **errp) |
| 2151 | { |
| 2152 | if (qemu_savevm_state_blocked(errp)) { |
| 2153 | return true; |
| 2154 | } |
| 2155 | |
| 2156 | if (migration_blockers) { |
Eduardo Habkost | 250561e | 2017-06-08 10:39:05 -0300 | [diff] [blame] | 2157 | error_propagate(errp, error_copy(migration_blockers->data)); |
Greg Kurz | 24f3902 | 2016-05-04 21:44:19 +0200 | [diff] [blame] | 2158 | return true; |
| 2159 | } |
| 2160 | |
| 2161 | return false; |
| 2162 | } |
| 2163 | |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 2164 | /* Returns true if continue to migrate, or false if error detected */ |
| 2165 | static bool migrate_prepare(MigrationState *s, bool blk, bool blk_inc, |
| 2166 | bool resume, Error **errp) |
| 2167 | { |
| 2168 | Error *local_err = NULL; |
| 2169 | |
| 2170 | if (resume) { |
| 2171 | if (s->state != MIGRATION_STATUS_POSTCOPY_PAUSED) { |
| 2172 | error_setg(errp, "Cannot resume if there is no " |
| 2173 | "paused migration"); |
| 2174 | return false; |
| 2175 | } |
Peter Xu | 97ca211 | 2018-07-23 20:33:03 +0800 | [diff] [blame] | 2176 | |
| 2177 | /* |
| 2178 | * Postcopy recovery won't work well with release-ram |
| 2179 | * capability since release-ram will drop the page buffer as |
| 2180 | * long as the page is put into the send buffer. So if there |
| 2181 | * is a network failure happened, any page buffers that have |
| 2182 | * not yet reached the destination VM but have already been |
| 2183 | * sent from the source VM will be lost forever. Let's refuse |
| 2184 | * the client from resuming such a postcopy migration. |
| 2185 | * Luckily release-ram was designed to only be used when src |
| 2186 | * and destination VMs are on the same host, so it should be |
| 2187 | * fine. |
| 2188 | */ |
| 2189 | if (migrate_release_ram()) { |
| 2190 | error_setg(errp, "Postcopy recovery cannot work " |
| 2191 | "when release-ram capability is set"); |
| 2192 | return false; |
| 2193 | } |
| 2194 | |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 2195 | /* This is a resume, skip init status */ |
| 2196 | return true; |
| 2197 | } |
| 2198 | |
Juan Quintela | 392d87e | 2020-01-21 15:39:23 +0100 | [diff] [blame] | 2199 | if (migration_is_running(s->state)) { |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 2200 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
| 2201 | return false; |
| 2202 | } |
| 2203 | |
| 2204 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
| 2205 | error_setg(errp, "Guest is waiting for an incoming migration"); |
| 2206 | return false; |
| 2207 | } |
| 2208 | |
Tuguoyi | 36d0fe6 | 2020-12-08 01:46:25 +0000 | [diff] [blame] | 2209 | if (runstate_check(RUN_STATE_POSTMIGRATE)) { |
| 2210 | error_setg(errp, "Can't migrate the vm that was paused due to " |
| 2211 | "previous migration"); |
| 2212 | return false; |
| 2213 | } |
| 2214 | |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 2215 | if (migration_is_blocked(errp)) { |
| 2216 | return false; |
| 2217 | } |
| 2218 | |
| 2219 | if (blk || blk_inc) { |
Rao, Lei | 3ba0244 | 2021-06-08 16:23:28 +0800 | [diff] [blame] | 2220 | if (migrate_colo_enabled()) { |
| 2221 | error_setg(errp, "No disk migration is required in COLO mode"); |
| 2222 | return false; |
| 2223 | } |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 2224 | if (migrate_use_block() || migrate_use_block_incremental()) { |
| 2225 | error_setg(errp, "Command options are incompatible with " |
| 2226 | "current migration capabilities"); |
| 2227 | return false; |
| 2228 | } |
| 2229 | migrate_set_block_enabled(true, &local_err); |
| 2230 | if (local_err) { |
| 2231 | error_propagate(errp, local_err); |
| 2232 | return false; |
| 2233 | } |
| 2234 | s->must_remove_block_options = true; |
| 2235 | } |
| 2236 | |
| 2237 | if (blk_inc) { |
| 2238 | migrate_set_block_incremental(s, true); |
| 2239 | } |
| 2240 | |
| 2241 | migrate_init(s); |
Ivan Ren | 87f3bd8 | 2019-08-02 18:18:41 +0800 | [diff] [blame] | 2242 | /* |
| 2243 | * set ram_counters memory to zero for a |
| 2244 | * new migration |
| 2245 | */ |
| 2246 | memset(&ram_counters, 0, sizeof(ram_counters)); |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 2247 | |
| 2248 | return true; |
| 2249 | } |
| 2250 | |
Luiz Capitulino | e1c37d0 | 2011-12-05 14:48:01 -0200 | [diff] [blame] | 2251 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
| 2252 | bool has_inc, bool inc, bool has_detach, bool detach, |
Peter Xu | 7a4da28 | 2018-05-02 18:47:23 +0800 | [diff] [blame] | 2253 | bool has_resume, bool resume, Error **errp) |
Juan Quintela | cab3014 | 2011-02-22 23:54:21 +0100 | [diff] [blame] | 2254 | { |
Paolo Bonzini | be7059c | 2012-10-03 14:34:33 +0200 | [diff] [blame] | 2255 | Error *local_err = NULL; |
Juan Quintela | 17549e8 | 2011-10-05 13:50:43 +0200 | [diff] [blame] | 2256 | MigrationState *s = migrate_get_current(); |
Longpeng(Mike) | d658f65 | 2020-08-06 15:40:29 +0800 | [diff] [blame] | 2257 | const char *p = NULL; |
Juan Quintela | cab3014 | 2011-02-22 23:54:21 +0100 | [diff] [blame] | 2258 | |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 2259 | if (!migrate_prepare(s, has_blk && blk, has_inc && inc, |
| 2260 | has_resume && resume, errp)) { |
| 2261 | /* Error detected, put into errp */ |
Luiz Capitulino | e1c37d0 | 2011-12-05 14:48:01 -0200 | [diff] [blame] | 2262 | return; |
Juan Quintela | cab3014 | 2011-02-22 23:54:21 +0100 | [diff] [blame] | 2263 | } |
Juan Quintela | cab3014 | 2011-02-22 23:54:21 +0100 | [diff] [blame] | 2264 | |
Lukas Straub | b5eea99 | 2020-12-28 16:08:52 +0100 | [diff] [blame] | 2265 | if (!(has_resume && resume)) { |
| 2266 | if (!yank_register_instance(MIGRATION_YANK_INSTANCE, errp)) { |
| 2267 | return; |
| 2268 | } |
| 2269 | } |
| 2270 | |
Longpeng(Mike) | d658f65 | 2020-08-06 15:40:29 +0800 | [diff] [blame] | 2271 | if (strstart(uri, "tcp:", &p) || |
Longpeng(Mike) | 9ba3b2b | 2020-08-06 15:40:30 +0800 | [diff] [blame] | 2272 | strstart(uri, "unix:", NULL) || |
| 2273 | strstart(uri, "vsock:", NULL)) { |
Longpeng(Mike) | d658f65 | 2020-08-06 15:40:29 +0800 | [diff] [blame] | 2274 | socket_start_outgoing_migration(s, p ? p : uri, &local_err); |
Michael R. Hines | 2da776d | 2013-07-22 10:01:54 -0400 | [diff] [blame] | 2275 | #ifdef CONFIG_RDMA |
Michael R. Hines | 41310c6 | 2013-12-19 04:52:01 +0800 | [diff] [blame] | 2276 | } else if (strstart(uri, "rdma:", &p)) { |
Michael R. Hines | 2da776d | 2013-07-22 10:01:54 -0400 | [diff] [blame] | 2277 | rdma_start_outgoing_migration(s, p, &local_err); |
| 2278 | #endif |
Juan Quintela | cab3014 | 2011-02-22 23:54:21 +0100 | [diff] [blame] | 2279 | } else if (strstart(uri, "exec:", &p)) { |
Paolo Bonzini | f37afb5 | 2012-10-02 10:02:46 +0200 | [diff] [blame] | 2280 | exec_start_outgoing_migration(s, p, &local_err); |
Juan Quintela | cab3014 | 2011-02-22 23:54:21 +0100 | [diff] [blame] | 2281 | } else if (strstart(uri, "fd:", &p)) { |
Paolo Bonzini | f37afb5 | 2012-10-02 10:02:46 +0200 | [diff] [blame] | 2282 | fd_start_outgoing_migration(s, p, &local_err); |
Juan Quintela | cab3014 | 2011-02-22 23:54:21 +0100 | [diff] [blame] | 2283 | } else { |
Lukas Straub | b5eea99 | 2020-12-28 16:08:52 +0100 | [diff] [blame] | 2284 | if (!(has_resume && resume)) { |
| 2285 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); |
| 2286 | } |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 2287 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
| 2288 | "a valid migration protocol"); |
zhanghailiang | 48781e5 | 2015-12-16 11:47:33 +0000 | [diff] [blame] | 2289 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
| 2290 | MIGRATION_STATUS_FAILED); |
Dr. David Alan Gilbert | 09576e7 | 2018-03-16 20:21:14 +0000 | [diff] [blame] | 2291 | block_cleanup_parameters(s); |
Luiz Capitulino | e1c37d0 | 2011-12-05 14:48:01 -0200 | [diff] [blame] | 2292 | return; |
Juan Quintela | cab3014 | 2011-02-22 23:54:21 +0100 | [diff] [blame] | 2293 | } |
| 2294 | |
Paolo Bonzini | f37afb5 | 2012-10-02 10:02:46 +0200 | [diff] [blame] | 2295 | if (local_err) { |
Lukas Straub | b5eea99 | 2020-12-28 16:08:52 +0100 | [diff] [blame] | 2296 | if (!(has_resume && resume)) { |
| 2297 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); |
| 2298 | } |
Daniel P. Berrange | d59ce6f | 2016-04-27 11:05:00 +0100 | [diff] [blame] | 2299 | migrate_fd_error(s, local_err); |
Paolo Bonzini | f37afb5 | 2012-10-02 10:02:46 +0200 | [diff] [blame] | 2300 | error_propagate(errp, local_err); |
Luiz Capitulino | e1c37d0 | 2011-12-05 14:48:01 -0200 | [diff] [blame] | 2301 | return; |
Juan Quintela | 1299c63 | 2011-11-09 21:29:01 +0100 | [diff] [blame] | 2302 | } |
Juan Quintela | cab3014 | 2011-02-22 23:54:21 +0100 | [diff] [blame] | 2303 | } |
| 2304 | |
Luiz Capitulino | 6cdedb0 | 2011-11-27 22:54:09 -0200 | [diff] [blame] | 2305 | void qmp_migrate_cancel(Error **errp) |
Juan Quintela | cab3014 | 2011-02-22 23:54:21 +0100 | [diff] [blame] | 2306 | { |
David Hildenbrand | c7c0e72 | 2021-04-29 13:27:02 +0200 | [diff] [blame] | 2307 | migration_cancel(); |
Juan Quintela | cab3014 | 2011-02-22 23:54:21 +0100 | [diff] [blame] | 2308 | } |
| 2309 | |
Dr. David Alan Gilbert | 89cfc02 | 2017-10-20 10:05:53 +0100 | [diff] [blame] | 2310 | void qmp_migrate_continue(MigrationStatus state, Error **errp) |
| 2311 | { |
| 2312 | MigrationState *s = migrate_get_current(); |
| 2313 | if (s->state != state) { |
| 2314 | error_setg(errp, "Migration not in expected state: %s", |
| 2315 | MigrationStatus_str(s->state)); |
| 2316 | return; |
| 2317 | } |
| 2318 | qemu_sem_post(&s->pause_sem); |
| 2319 | } |
| 2320 | |
Pavel Butsykin | 53f09a1 | 2017-02-03 18:23:20 +0300 | [diff] [blame] | 2321 | bool migrate_release_ram(void) |
| 2322 | { |
| 2323 | MigrationState *s; |
| 2324 | |
| 2325 | s = migrate_get_current(); |
| 2326 | |
| 2327 | return s->enabled_capabilities[MIGRATION_CAPABILITY_RELEASE_RAM]; |
| 2328 | } |
| 2329 | |
Dr. David Alan Gilbert | 53dd370 | 2015-11-05 18:10:51 +0000 | [diff] [blame] | 2330 | bool migrate_postcopy_ram(void) |
| 2331 | { |
| 2332 | MigrationState *s; |
| 2333 | |
| 2334 | s = migrate_get_current(); |
| 2335 | |
Dr. David Alan Gilbert | 32c3db5 | 2016-03-11 09:53:36 +0000 | [diff] [blame] | 2336 | return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
Dr. David Alan Gilbert | 53dd370 | 2015-11-05 18:10:51 +0000 | [diff] [blame] | 2337 | } |
| 2338 | |
Vladimir Sementsov-Ogievskiy | 58110f0 | 2017-07-10 19:30:16 +0300 | [diff] [blame] | 2339 | bool migrate_postcopy(void) |
| 2340 | { |
Vladimir Sementsov-Ogievskiy | dd6bb91 | 2018-03-13 15:34:00 -0400 | [diff] [blame] | 2341 | return migrate_postcopy_ram() || migrate_dirty_bitmaps(); |
Vladimir Sementsov-Ogievskiy | 58110f0 | 2017-07-10 19:30:16 +0300 | [diff] [blame] | 2342 | } |
| 2343 | |
Chegu Vinod | bde1e2e | 2013-06-24 03:49:42 -0600 | [diff] [blame] | 2344 | bool migrate_auto_converge(void) |
| 2345 | { |
| 2346 | MigrationState *s; |
| 2347 | |
| 2348 | s = migrate_get_current(); |
| 2349 | |
| 2350 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; |
| 2351 | } |
| 2352 | |
Peter Lieven | 323004a | 2013-07-18 09:48:50 +0200 | [diff] [blame] | 2353 | bool migrate_zero_blocks(void) |
| 2354 | { |
| 2355 | MigrationState *s; |
| 2356 | |
| 2357 | s = migrate_get_current(); |
| 2358 | |
| 2359 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; |
| 2360 | } |
| 2361 | |
Alexey Perevalov | f22f928 | 2018-03-22 21:17:22 +0300 | [diff] [blame] | 2362 | bool migrate_postcopy_blocktime(void) |
| 2363 | { |
| 2364 | MigrationState *s; |
| 2365 | |
| 2366 | s = migrate_get_current(); |
| 2367 | |
| 2368 | return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME]; |
| 2369 | } |
| 2370 | |
Liang Li | 8706d2d | 2015-03-23 16:32:17 +0800 | [diff] [blame] | 2371 | bool migrate_use_compression(void) |
| 2372 | { |
Liang Li | dde4e69 | 2015-03-23 16:32:26 +0800 | [diff] [blame] | 2373 | MigrationState *s; |
| 2374 | |
| 2375 | s = migrate_get_current(); |
| 2376 | |
| 2377 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; |
Liang Li | 8706d2d | 2015-03-23 16:32:17 +0800 | [diff] [blame] | 2378 | } |
| 2379 | |
| 2380 | int migrate_compress_level(void) |
| 2381 | { |
| 2382 | MigrationState *s; |
| 2383 | |
| 2384 | s = migrate_get_current(); |
| 2385 | |
Daniel P. Berrange | 2594f56 | 2016-04-27 11:05:14 +0100 | [diff] [blame] | 2386 | return s->parameters.compress_level; |
Liang Li | 8706d2d | 2015-03-23 16:32:17 +0800 | [diff] [blame] | 2387 | } |
| 2388 | |
| 2389 | int migrate_compress_threads(void) |
| 2390 | { |
| 2391 | MigrationState *s; |
| 2392 | |
| 2393 | s = migrate_get_current(); |
| 2394 | |
Daniel P. Berrange | 2594f56 | 2016-04-27 11:05:14 +0100 | [diff] [blame] | 2395 | return s->parameters.compress_threads; |
Liang Li | 8706d2d | 2015-03-23 16:32:17 +0800 | [diff] [blame] | 2396 | } |
| 2397 | |
Xiao Guangrong | 1d58872 | 2018-08-21 16:10:20 +0800 | [diff] [blame] | 2398 | int migrate_compress_wait_thread(void) |
| 2399 | { |
| 2400 | MigrationState *s; |
| 2401 | |
| 2402 | s = migrate_get_current(); |
| 2403 | |
| 2404 | return s->parameters.compress_wait_thread; |
| 2405 | } |
| 2406 | |
Liang Li | 3fcb38c | 2015-03-23 16:32:18 +0800 | [diff] [blame] | 2407 | int migrate_decompress_threads(void) |
| 2408 | { |
| 2409 | MigrationState *s; |
| 2410 | |
| 2411 | s = migrate_get_current(); |
| 2412 | |
Daniel P. Berrange | 2594f56 | 2016-04-27 11:05:14 +0100 | [diff] [blame] | 2413 | return s->parameters.decompress_threads; |
Liang Li | 3fcb38c | 2015-03-23 16:32:18 +0800 | [diff] [blame] | 2414 | } |
| 2415 | |
Vladimir Sementsov-Ogievskiy | 55efc8c | 2018-03-13 15:34:00 -0400 | [diff] [blame] | 2416 | bool migrate_dirty_bitmaps(void) |
| 2417 | { |
| 2418 | MigrationState *s; |
| 2419 | |
| 2420 | s = migrate_get_current(); |
| 2421 | |
| 2422 | return s->enabled_capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS]; |
| 2423 | } |
| 2424 | |
Yury Kotov | 1826906 | 2019-02-15 20:45:45 +0300 | [diff] [blame] | 2425 | bool migrate_ignore_shared(void) |
| 2426 | { |
| 2427 | MigrationState *s; |
| 2428 | |
| 2429 | s = migrate_get_current(); |
| 2430 | |
| 2431 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED]; |
| 2432 | } |
| 2433 | |
Yury Kotov | b9d68df | 2019-09-03 19:22:44 +0300 | [diff] [blame] | 2434 | bool migrate_validate_uuid(void) |
| 2435 | { |
| 2436 | MigrationState *s; |
| 2437 | |
| 2438 | s = migrate_get_current(); |
| 2439 | |
| 2440 | return s->enabled_capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID]; |
| 2441 | } |
| 2442 | |
Juan Quintela | b05dc72 | 2015-07-07 14:44:05 +0200 | [diff] [blame] | 2443 | bool migrate_use_events(void) |
| 2444 | { |
| 2445 | MigrationState *s; |
| 2446 | |
| 2447 | s = migrate_get_current(); |
| 2448 | |
| 2449 | return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS]; |
| 2450 | } |
| 2451 | |
Juan Quintela | 30126bb | 2016-01-14 12:23:00 +0100 | [diff] [blame] | 2452 | bool migrate_use_multifd(void) |
| 2453 | { |
| 2454 | MigrationState *s; |
| 2455 | |
| 2456 | s = migrate_get_current(); |
| 2457 | |
Juan Quintela | cbfd6c9 | 2019-02-06 13:54:06 +0100 | [diff] [blame] | 2458 | return s->enabled_capabilities[MIGRATION_CAPABILITY_MULTIFD]; |
Juan Quintela | 30126bb | 2016-01-14 12:23:00 +0100 | [diff] [blame] | 2459 | } |
| 2460 | |
Dr. David Alan Gilbert | 93fbd03 | 2017-10-20 10:05:50 +0100 | [diff] [blame] | 2461 | bool migrate_pause_before_switchover(void) |
| 2462 | { |
| 2463 | MigrationState *s; |
| 2464 | |
| 2465 | s = migrate_get_current(); |
| 2466 | |
| 2467 | return s->enabled_capabilities[ |
| 2468 | MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER]; |
| 2469 | } |
| 2470 | |
Juan Quintela | 4075fb1 | 2016-01-15 08:56:17 +0100 | [diff] [blame] | 2471 | int migrate_multifd_channels(void) |
| 2472 | { |
| 2473 | MigrationState *s; |
| 2474 | |
| 2475 | s = migrate_get_current(); |
| 2476 | |
Juan Quintela | cbfd6c9 | 2019-02-06 13:54:06 +0100 | [diff] [blame] | 2477 | return s->parameters.multifd_channels; |
Juan Quintela | 4075fb1 | 2016-01-15 08:56:17 +0100 | [diff] [blame] | 2478 | } |
| 2479 | |
Juan Quintela | ab7cbb0 | 2019-05-15 13:37:46 +0200 | [diff] [blame] | 2480 | MultiFDCompression migrate_multifd_compression(void) |
| 2481 | { |
| 2482 | MigrationState *s; |
| 2483 | |
| 2484 | s = migrate_get_current(); |
| 2485 | |
| 2486 | return s->parameters.multifd_compression; |
| 2487 | } |
| 2488 | |
Juan Quintela | 9004db4 | 2020-01-23 17:08:52 +0100 | [diff] [blame] | 2489 | int migrate_multifd_zlib_level(void) |
| 2490 | { |
| 2491 | MigrationState *s; |
| 2492 | |
| 2493 | s = migrate_get_current(); |
| 2494 | |
| 2495 | return s->parameters.multifd_zlib_level; |
| 2496 | } |
| 2497 | |
Juan Quintela | 6a9ad15 | 2020-01-23 17:41:36 +0100 | [diff] [blame] | 2498 | int migrate_multifd_zstd_level(void) |
| 2499 | { |
| 2500 | MigrationState *s; |
| 2501 | |
| 2502 | s = migrate_get_current(); |
| 2503 | |
| 2504 | return s->parameters.multifd_zstd_level; |
| 2505 | } |
| 2506 | |
Orit Wasserman | 17ad9b3 | 2012-08-06 21:42:53 +0300 | [diff] [blame] | 2507 | int migrate_use_xbzrle(void) |
| 2508 | { |
| 2509 | MigrationState *s; |
| 2510 | |
| 2511 | s = migrate_get_current(); |
| 2512 | |
| 2513 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; |
| 2514 | } |
| 2515 | |
Markus Armbruster | 8b9407a | 2021-02-02 15:17:32 +0100 | [diff] [blame] | 2516 | uint64_t migrate_xbzrle_cache_size(void) |
Orit Wasserman | 17ad9b3 | 2012-08-06 21:42:53 +0300 | [diff] [blame] | 2517 | { |
| 2518 | MigrationState *s; |
| 2519 | |
| 2520 | s = migrate_get_current(); |
| 2521 | |
Juan Quintela | 73af8dd | 2017-10-05 21:30:10 +0200 | [diff] [blame] | 2522 | return s->parameters.xbzrle_cache_size; |
Orit Wasserman | 17ad9b3 | 2012-08-06 21:42:53 +0300 | [diff] [blame] | 2523 | } |
Juan Quintela | 0d82d0e | 2012-10-03 14:18:33 +0200 | [diff] [blame] | 2524 | |
Dr. David Alan Gilbert | 7e555c6 | 2018-06-13 11:26:40 +0100 | [diff] [blame] | 2525 | static int64_t migrate_max_postcopy_bandwidth(void) |
| 2526 | { |
| 2527 | MigrationState *s; |
| 2528 | |
| 2529 | s = migrate_get_current(); |
| 2530 | |
| 2531 | return s->parameters.max_postcopy_bandwidth; |
| 2532 | } |
| 2533 | |
Juan Quintela | 2833c59 | 2017-04-05 18:32:37 +0200 | [diff] [blame] | 2534 | bool migrate_use_block(void) |
| 2535 | { |
| 2536 | MigrationState *s; |
| 2537 | |
| 2538 | s = migrate_get_current(); |
| 2539 | |
| 2540 | return s->enabled_capabilities[MIGRATION_CAPABILITY_BLOCK]; |
| 2541 | } |
| 2542 | |
Peter Xu | c788ada | 2017-06-26 18:28:55 +0800 | [diff] [blame] | 2543 | bool migrate_use_return_path(void) |
| 2544 | { |
| 2545 | MigrationState *s; |
| 2546 | |
| 2547 | s = migrate_get_current(); |
| 2548 | |
| 2549 | return s->enabled_capabilities[MIGRATION_CAPABILITY_RETURN_PATH]; |
| 2550 | } |
| 2551 | |
Juan Quintela | 2833c59 | 2017-04-05 18:32:37 +0200 | [diff] [blame] | 2552 | bool migrate_use_block_incremental(void) |
| 2553 | { |
| 2554 | MigrationState *s; |
| 2555 | |
| 2556 | s = migrate_get_current(); |
| 2557 | |
| 2558 | return s->parameters.block_incremental; |
| 2559 | } |
| 2560 | |
Andrey Gruzdev | 6e8c25b | 2021-01-29 13:14:03 +0300 | [diff] [blame] | 2561 | bool migrate_background_snapshot(void) |
| 2562 | { |
| 2563 | MigrationState *s; |
| 2564 | |
| 2565 | s = migrate_get_current(); |
| 2566 | |
| 2567 | return s->enabled_capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]; |
| 2568 | } |
| 2569 | |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2570 | /* migration thread support */ |
| 2571 | /* |
| 2572 | * Something bad happened to the RP stream, mark an error |
| 2573 | * The caller shall print or trace something to indicate why |
| 2574 | */ |
| 2575 | static void mark_source_rp_bad(MigrationState *s) |
| 2576 | { |
| 2577 | s->rp_state.error = true; |
| 2578 | } |
| 2579 | |
| 2580 | static struct rp_cmd_args { |
| 2581 | ssize_t len; /* -1 = variable */ |
| 2582 | const char *name; |
| 2583 | } rp_cmd_args[] = { |
| 2584 | [MIG_RP_MSG_INVALID] = { .len = -1, .name = "INVALID" }, |
| 2585 | [MIG_RP_MSG_SHUT] = { .len = 4, .name = "SHUT" }, |
| 2586 | [MIG_RP_MSG_PONG] = { .len = 4, .name = "PONG" }, |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 2587 | [MIG_RP_MSG_REQ_PAGES] = { .len = 12, .name = "REQ_PAGES" }, |
| 2588 | [MIG_RP_MSG_REQ_PAGES_ID] = { .len = -1, .name = "REQ_PAGES_ID" }, |
Peter Xu | a335deb | 2018-05-02 18:47:28 +0800 | [diff] [blame] | 2589 | [MIG_RP_MSG_RECV_BITMAP] = { .len = -1, .name = "RECV_BITMAP" }, |
Peter Xu | 13955b8 | 2018-05-02 18:47:30 +0800 | [diff] [blame] | 2590 | [MIG_RP_MSG_RESUME_ACK] = { .len = 4, .name = "RESUME_ACK" }, |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2591 | [MIG_RP_MSG_MAX] = { .len = -1, .name = "MAX" }, |
| 2592 | }; |
| 2593 | |
| 2594 | /* |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 2595 | * Process a request for pages received on the return path, |
| 2596 | * We're allowed to send more than requested (e.g. to round to our page size) |
| 2597 | * and we don't need to send pages that have already been sent. |
| 2598 | */ |
| 2599 | static void migrate_handle_rp_req_pages(MigrationState *ms, const char* rbname, |
| 2600 | ram_addr_t start, size_t len) |
| 2601 | { |
Wei Yang | 038adc2 | 2019-10-13 10:11:45 +0800 | [diff] [blame] | 2602 | long our_host_ps = qemu_real_host_page_size; |
Dr. David Alan Gilbert | 6c595cd | 2015-11-05 18:11:08 +0000 | [diff] [blame] | 2603 | |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 2604 | trace_migrate_handle_rp_req_pages(rbname, start, len); |
Dr. David Alan Gilbert | 6c595cd | 2015-11-05 18:11:08 +0000 | [diff] [blame] | 2605 | |
| 2606 | /* |
| 2607 | * Since we currently insist on matching page sizes, just sanity check |
| 2608 | * we're being asked for whole host pages. |
| 2609 | */ |
Bihong Yu | 395cb45 | 2020-10-20 11:10:43 +0800 | [diff] [blame] | 2610 | if (start & (our_host_ps - 1) || |
| 2611 | (len & (our_host_ps - 1))) { |
Dr. David Alan Gilbert | 6c595cd | 2015-11-05 18:11:08 +0000 | [diff] [blame] | 2612 | error_report("%s: Misaligned page request, start: " RAM_ADDR_FMT |
| 2613 | " len: %zd", __func__, start, len); |
| 2614 | mark_source_rp_bad(ms); |
| 2615 | return; |
| 2616 | } |
| 2617 | |
Juan Quintela | 9650689 | 2017-03-14 18:41:03 +0100 | [diff] [blame] | 2618 | if (ram_save_queue_pages(rbname, start, len)) { |
Dr. David Alan Gilbert | 6c595cd | 2015-11-05 18:11:08 +0000 | [diff] [blame] | 2619 | mark_source_rp_bad(ms); |
| 2620 | } |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 2621 | } |
| 2622 | |
Peter Xu | 14b1742 | 2018-05-02 18:47:21 +0800 | [diff] [blame] | 2623 | /* Return true to retry, false to quit */ |
| 2624 | static bool postcopy_pause_return_path_thread(MigrationState *s) |
| 2625 | { |
| 2626 | trace_postcopy_pause_return_path(); |
| 2627 | |
| 2628 | qemu_sem_wait(&s->postcopy_pause_rp_sem); |
| 2629 | |
| 2630 | trace_postcopy_pause_return_path_continued(); |
| 2631 | |
| 2632 | return true; |
| 2633 | } |
| 2634 | |
Peter Xu | a335deb | 2018-05-02 18:47:28 +0800 | [diff] [blame] | 2635 | static int migrate_handle_rp_recv_bitmap(MigrationState *s, char *block_name) |
| 2636 | { |
| 2637 | RAMBlock *block = qemu_ram_block_by_name(block_name); |
| 2638 | |
| 2639 | if (!block) { |
| 2640 | error_report("%s: invalid block name '%s'", __func__, block_name); |
| 2641 | return -EINVAL; |
| 2642 | } |
| 2643 | |
| 2644 | /* Fetch the received bitmap and refresh the dirty bitmap */ |
| 2645 | return ram_dirty_bitmap_reload(s, block); |
| 2646 | } |
| 2647 | |
Peter Xu | 13955b8 | 2018-05-02 18:47:30 +0800 | [diff] [blame] | 2648 | static int migrate_handle_rp_resume_ack(MigrationState *s, uint32_t value) |
| 2649 | { |
| 2650 | trace_source_return_path_thread_resume_ack(value); |
| 2651 | |
| 2652 | if (value != MIGRATION_RESUME_ACK_VALUE) { |
| 2653 | error_report("%s: illegal resume_ack value %"PRIu32, |
| 2654 | __func__, value); |
| 2655 | return -1; |
| 2656 | } |
| 2657 | |
| 2658 | /* Now both sides are active. */ |
| 2659 | migrate_set_state(&s->state, MIGRATION_STATUS_POSTCOPY_RECOVER, |
| 2660 | MIGRATION_STATUS_POSTCOPY_ACTIVE); |
| 2661 | |
Peter Xu | 9419069 | 2018-05-02 18:47:34 +0800 | [diff] [blame] | 2662 | /* Notify send thread that time to continue send pages */ |
| 2663 | qemu_sem_post(&s->rp_state.rp_sem); |
Peter Xu | 13955b8 | 2018-05-02 18:47:30 +0800 | [diff] [blame] | 2664 | |
| 2665 | return 0; |
| 2666 | } |
| 2667 | |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 2668 | /* |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2669 | * Handles messages sent on the return path towards the source VM |
| 2670 | * |
| 2671 | */ |
| 2672 | static void *source_return_path_thread(void *opaque) |
| 2673 | { |
| 2674 | MigrationState *ms = opaque; |
| 2675 | QEMUFile *rp = ms->rp_state.from_dst_file; |
| 2676 | uint16_t header_len, header_type; |
Peter Xu | 568b01c | 2016-03-09 14:12:12 +0800 | [diff] [blame] | 2677 | uint8_t buf[512]; |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2678 | uint32_t tmp32, sibling_error; |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 2679 | ram_addr_t start = 0; /* =0 to silence warning */ |
| 2680 | size_t len = 0, expected_len; |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2681 | int res; |
| 2682 | |
| 2683 | trace_source_return_path_thread_entry(); |
Lidong Chen | 74637e6 | 2018-08-06 21:29:29 +0800 | [diff] [blame] | 2684 | rcu_register_thread(); |
Peter Xu | 14b1742 | 2018-05-02 18:47:21 +0800 | [diff] [blame] | 2685 | |
| 2686 | retry: |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2687 | while (!ms->rp_state.error && !qemu_file_get_error(rp) && |
| 2688 | migration_is_setup_or_active(ms->state)) { |
| 2689 | trace_source_return_path_thread_loop_top(); |
| 2690 | header_type = qemu_get_be16(rp); |
| 2691 | header_len = qemu_get_be16(rp); |
| 2692 | |
Peter Xu | 7a9ddfb | 2018-02-08 18:31:05 +0800 | [diff] [blame] | 2693 | if (qemu_file_get_error(rp)) { |
| 2694 | mark_source_rp_bad(ms); |
| 2695 | goto out; |
| 2696 | } |
| 2697 | |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2698 | if (header_type >= MIG_RP_MSG_MAX || |
| 2699 | header_type == MIG_RP_MSG_INVALID) { |
| 2700 | error_report("RP: Received invalid message 0x%04x length 0x%04x", |
Mao Zhongyi | ed8b282 | 2020-03-28 01:19:08 +0800 | [diff] [blame] | 2701 | header_type, header_len); |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2702 | mark_source_rp_bad(ms); |
| 2703 | goto out; |
| 2704 | } |
| 2705 | |
| 2706 | if ((rp_cmd_args[header_type].len != -1 && |
| 2707 | header_len != rp_cmd_args[header_type].len) || |
Peter Xu | 568b01c | 2016-03-09 14:12:12 +0800 | [diff] [blame] | 2708 | header_len > sizeof(buf)) { |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2709 | error_report("RP: Received '%s' message (0x%04x) with" |
Mao Zhongyi | ed8b282 | 2020-03-28 01:19:08 +0800 | [diff] [blame] | 2710 | "incorrect length %d expecting %zu", |
| 2711 | rp_cmd_args[header_type].name, header_type, header_len, |
| 2712 | (size_t)rp_cmd_args[header_type].len); |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2713 | mark_source_rp_bad(ms); |
| 2714 | goto out; |
| 2715 | } |
| 2716 | |
| 2717 | /* We know we've got a valid header by this point */ |
| 2718 | res = qemu_get_buffer(rp, buf, header_len); |
| 2719 | if (res != header_len) { |
| 2720 | error_report("RP: Failed reading data for message 0x%04x" |
| 2721 | " read %d expected %d", |
| 2722 | header_type, res, header_len); |
| 2723 | mark_source_rp_bad(ms); |
| 2724 | goto out; |
| 2725 | } |
| 2726 | |
| 2727 | /* OK, we have the message and the data */ |
| 2728 | switch (header_type) { |
| 2729 | case MIG_RP_MSG_SHUT: |
Peter Maydell | 4d88513 | 2016-06-10 17:09:22 +0100 | [diff] [blame] | 2730 | sibling_error = ldl_be_p(buf); |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2731 | trace_source_return_path_thread_shut(sibling_error); |
| 2732 | if (sibling_error) { |
| 2733 | error_report("RP: Sibling indicated error %d", sibling_error); |
| 2734 | mark_source_rp_bad(ms); |
| 2735 | } |
| 2736 | /* |
| 2737 | * We'll let the main thread deal with closing the RP |
| 2738 | * we could do a shutdown(2) on it, but we're the only user |
| 2739 | * anyway, so there's nothing gained. |
| 2740 | */ |
| 2741 | goto out; |
| 2742 | |
| 2743 | case MIG_RP_MSG_PONG: |
Peter Maydell | 4d88513 | 2016-06-10 17:09:22 +0100 | [diff] [blame] | 2744 | tmp32 = ldl_be_p(buf); |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2745 | trace_source_return_path_thread_pong(tmp32); |
| 2746 | break; |
| 2747 | |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 2748 | case MIG_RP_MSG_REQ_PAGES: |
Peter Maydell | 4d88513 | 2016-06-10 17:09:22 +0100 | [diff] [blame] | 2749 | start = ldq_be_p(buf); |
| 2750 | len = ldl_be_p(buf + 8); |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 2751 | migrate_handle_rp_req_pages(ms, NULL, start, len); |
| 2752 | break; |
| 2753 | |
| 2754 | case MIG_RP_MSG_REQ_PAGES_ID: |
| 2755 | expected_len = 12 + 1; /* header + termination */ |
| 2756 | |
| 2757 | if (header_len >= expected_len) { |
Peter Maydell | 4d88513 | 2016-06-10 17:09:22 +0100 | [diff] [blame] | 2758 | start = ldq_be_p(buf); |
| 2759 | len = ldl_be_p(buf + 8); |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 2760 | /* Now we expect an idstr */ |
| 2761 | tmp32 = buf[12]; /* Length of the following idstr */ |
| 2762 | buf[13 + tmp32] = '\0'; |
| 2763 | expected_len += tmp32; |
| 2764 | } |
| 2765 | if (header_len != expected_len) { |
| 2766 | error_report("RP: Req_Page_id with length %d expecting %zd", |
Mao Zhongyi | ed8b282 | 2020-03-28 01:19:08 +0800 | [diff] [blame] | 2767 | header_len, expected_len); |
Dr. David Alan Gilbert | 1e2d90e | 2015-11-05 18:11:07 +0000 | [diff] [blame] | 2768 | mark_source_rp_bad(ms); |
| 2769 | goto out; |
| 2770 | } |
| 2771 | migrate_handle_rp_req_pages(ms, (char *)&buf[13], start, len); |
| 2772 | break; |
| 2773 | |
Peter Xu | a335deb | 2018-05-02 18:47:28 +0800 | [diff] [blame] | 2774 | case MIG_RP_MSG_RECV_BITMAP: |
| 2775 | if (header_len < 1) { |
| 2776 | error_report("%s: missing block name", __func__); |
| 2777 | mark_source_rp_bad(ms); |
| 2778 | goto out; |
| 2779 | } |
| 2780 | /* Format: len (1B) + idstr (<255B). This ends the idstr. */ |
| 2781 | buf[buf[0] + 1] = '\0'; |
| 2782 | if (migrate_handle_rp_recv_bitmap(ms, (char *)(buf + 1))) { |
| 2783 | mark_source_rp_bad(ms); |
| 2784 | goto out; |
| 2785 | } |
| 2786 | break; |
| 2787 | |
Peter Xu | 13955b8 | 2018-05-02 18:47:30 +0800 | [diff] [blame] | 2788 | case MIG_RP_MSG_RESUME_ACK: |
| 2789 | tmp32 = ldl_be_p(buf); |
| 2790 | if (migrate_handle_rp_resume_ack(ms, tmp32)) { |
| 2791 | mark_source_rp_bad(ms); |
| 2792 | goto out; |
| 2793 | } |
| 2794 | break; |
| 2795 | |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2796 | default: |
| 2797 | break; |
| 2798 | } |
| 2799 | } |
Peter Xu | 14b1742 | 2018-05-02 18:47:21 +0800 | [diff] [blame] | 2800 | |
| 2801 | out: |
| 2802 | res = qemu_file_get_error(rp); |
| 2803 | if (res) { |
Dr. David Alan Gilbert | fb14a42 | 2019-10-07 11:35:07 +0100 | [diff] [blame] | 2804 | if (res == -EIO && migration_in_postcopy()) { |
Peter Xu | 14b1742 | 2018-05-02 18:47:21 +0800 | [diff] [blame] | 2805 | /* |
| 2806 | * Maybe there is something we can do: it looks like a |
| 2807 | * network down issue, and we pause for a recovery. |
| 2808 | */ |
| 2809 | if (postcopy_pause_return_path_thread(ms)) { |
| 2810 | /* Reload rp, reset the rest */ |
Marc-André Lureau | 0284a2a | 2018-09-25 13:22:45 +0400 | [diff] [blame] | 2811 | if (rp != ms->rp_state.from_dst_file) { |
| 2812 | qemu_fclose(rp); |
| 2813 | rp = ms->rp_state.from_dst_file; |
| 2814 | } |
Peter Xu | 14b1742 | 2018-05-02 18:47:21 +0800 | [diff] [blame] | 2815 | ms->rp_state.error = false; |
| 2816 | goto retry; |
| 2817 | } |
| 2818 | } |
| 2819 | |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2820 | trace_source_return_path_thread_bad_end(); |
| 2821 | mark_source_rp_bad(ms); |
| 2822 | } |
| 2823 | |
| 2824 | trace_source_return_path_thread_end(); |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2825 | ms->rp_state.from_dst_file = NULL; |
| 2826 | qemu_fclose(rp); |
Lidong Chen | 74637e6 | 2018-08-06 21:29:29 +0800 | [diff] [blame] | 2827 | rcu_unregister_thread(); |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2828 | return NULL; |
| 2829 | } |
| 2830 | |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 2831 | static int open_return_path_on_source(MigrationState *ms, |
| 2832 | bool create_thread) |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2833 | { |
| 2834 | |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 2835 | ms->rp_state.from_dst_file = qemu_file_get_return_path(ms->to_dst_file); |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2836 | if (!ms->rp_state.from_dst_file) { |
| 2837 | return -1; |
| 2838 | } |
| 2839 | |
| 2840 | trace_open_return_path_on_source(); |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 2841 | |
| 2842 | if (!create_thread) { |
| 2843 | /* We're done */ |
| 2844 | return 0; |
| 2845 | } |
| 2846 | |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2847 | qemu_thread_create(&ms->rp_state.rp_thread, "return path", |
| 2848 | source_return_path_thread, ms, QEMU_THREAD_JOINABLE); |
| 2849 | |
| 2850 | trace_open_return_path_on_source_continue(); |
| 2851 | |
| 2852 | return 0; |
| 2853 | } |
| 2854 | |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2855 | /* Returns 0 if the RP was ok, otherwise there was an error on the RP */ |
| 2856 | static int await_return_path_close_on_source(MigrationState *ms) |
| 2857 | { |
| 2858 | /* |
| 2859 | * If this is a normal exit then the destination will send a SHUT and the |
| 2860 | * rp_thread will exit, however if there's an error we need to cause |
| 2861 | * it to exit. |
| 2862 | */ |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 2863 | if (qemu_file_get_error(ms->to_dst_file) && ms->rp_state.from_dst_file) { |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 2864 | /* |
| 2865 | * shutdown(2), if we have it, will cause it to unblock if it's stuck |
| 2866 | * waiting for the destination. |
| 2867 | */ |
| 2868 | qemu_file_shutdown(ms->rp_state.from_dst_file); |
| 2869 | mark_source_rp_bad(ms); |
| 2870 | } |
| 2871 | trace_await_return_path_close_on_source_joining(); |
| 2872 | qemu_thread_join(&ms->rp_state.rp_thread); |
| 2873 | trace_await_return_path_close_on_source_close(); |
| 2874 | return ms->rp_state.error; |
| 2875 | } |
| 2876 | |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2877 | /* |
| 2878 | * Switch from normal iteration to postcopy |
| 2879 | * Returns non-0 on error |
| 2880 | */ |
Peter Xu | 7287cbd | 2018-01-03 20:20:09 +0800 | [diff] [blame] | 2881 | static int postcopy_start(MigrationState *ms) |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2882 | { |
| 2883 | int ret; |
Daniel P. Berrange | 61b67d4 | 2016-04-27 11:05:01 +0100 | [diff] [blame] | 2884 | QIOChannelBuffer *bioc; |
| 2885 | QEMUFile *fb; |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2886 | int64_t time_at_stop = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
Dr. David Alan Gilbert | 7e555c6 | 2018-06-13 11:26:40 +0100 | [diff] [blame] | 2887 | int64_t bandwidth = migrate_max_postcopy_bandwidth(); |
Dr. David Alan Gilbert | ef8d648 | 2017-02-02 15:59:09 +0000 | [diff] [blame] | 2888 | bool restart_block = false; |
Dr. David Alan Gilbert | 0331c8c | 2017-10-20 10:05:56 +0100 | [diff] [blame] | 2889 | int cur_state = MIGRATION_STATUS_ACTIVE; |
| 2890 | if (!migrate_pause_before_switchover()) { |
| 2891 | migrate_set_state(&ms->state, MIGRATION_STATUS_ACTIVE, |
| 2892 | MIGRATION_STATUS_POSTCOPY_ACTIVE); |
| 2893 | } |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2894 | |
| 2895 | trace_postcopy_start(); |
| 2896 | qemu_mutex_lock_iothread(); |
| 2897 | trace_postcopy_start_set_run(); |
| 2898 | |
Daniel Henrique Barboza | fb06411 | 2018-12-05 17:47:01 -0200 | [diff] [blame] | 2899 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2900 | global_state_store(); |
| 2901 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); |
Kevin Wolf | 76b1c7f | 2015-12-22 14:07:08 +0100 | [diff] [blame] | 2902 | if (ret < 0) { |
| 2903 | goto fail; |
| 2904 | } |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2905 | |
Dr. David Alan Gilbert | 0331c8c | 2017-10-20 10:05:56 +0100 | [diff] [blame] | 2906 | ret = migration_maybe_pause(ms, &cur_state, |
| 2907 | MIGRATION_STATUS_POSTCOPY_ACTIVE); |
| 2908 | if (ret < 0) { |
| 2909 | goto fail; |
| 2910 | } |
| 2911 | |
Kevin Wolf | 76b1c7f | 2015-12-22 14:07:08 +0100 | [diff] [blame] | 2912 | ret = bdrv_inactivate_all(); |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2913 | if (ret < 0) { |
| 2914 | goto fail; |
| 2915 | } |
Dr. David Alan Gilbert | ef8d648 | 2017-02-02 15:59:09 +0000 | [diff] [blame] | 2916 | restart_block = true; |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2917 | |
| 2918 | /* |
Dr. David Alan Gilbert | 1c0d249 | 2015-11-11 14:02:27 +0000 | [diff] [blame] | 2919 | * Cause any non-postcopiable, but iterative devices to |
| 2920 | * send out their final data. |
| 2921 | */ |
Fam Zheng | a1fbe75 | 2017-06-17 00:06:58 +0800 | [diff] [blame] | 2922 | qemu_savevm_state_complete_precopy(ms->to_dst_file, true, false); |
Dr. David Alan Gilbert | 1c0d249 | 2015-11-11 14:02:27 +0000 | [diff] [blame] | 2923 | |
| 2924 | /* |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2925 | * in Finish migrate and with the io-lock held everything should |
| 2926 | * be quiet, but we've potentially still got dirty pages and we |
| 2927 | * need to tell the destination to throw any pages it's already received |
| 2928 | * that are dirty |
| 2929 | */ |
Vladimir Sementsov-Ogievskiy | 58110f0 | 2017-07-10 19:30:16 +0300 | [diff] [blame] | 2930 | if (migrate_postcopy_ram()) { |
| 2931 | if (ram_postcopy_send_discard_bitmap(ms)) { |
| 2932 | error_report("postcopy send discard bitmap failed"); |
| 2933 | goto fail; |
| 2934 | } |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2935 | } |
| 2936 | |
| 2937 | /* |
| 2938 | * send rest of state - note things that are doing postcopy |
| 2939 | * will notice we're in POSTCOPY_ACTIVE and not actually |
| 2940 | * wrap their state up here |
| 2941 | */ |
Dr. David Alan Gilbert | 7e555c6 | 2018-06-13 11:26:40 +0100 | [diff] [blame] | 2942 | /* 0 max-postcopy-bandwidth means unlimited */ |
| 2943 | if (!bandwidth) { |
| 2944 | qemu_file_set_rate_limit(ms->to_dst_file, INT64_MAX); |
| 2945 | } else { |
| 2946 | qemu_file_set_rate_limit(ms->to_dst_file, bandwidth / XFER_LIMIT_RATIO); |
| 2947 | } |
Vladimir Sementsov-Ogievskiy | 58110f0 | 2017-07-10 19:30:16 +0300 | [diff] [blame] | 2948 | if (migrate_postcopy_ram()) { |
| 2949 | /* Ping just for debugging, helps line traces up */ |
| 2950 | qemu_savevm_send_ping(ms->to_dst_file, 2); |
| 2951 | } |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2952 | |
| 2953 | /* |
| 2954 | * While loading the device state we may trigger page transfer |
| 2955 | * requests and the fd must be free to process those, and thus |
| 2956 | * the destination must read the whole device state off the fd before |
| 2957 | * it starts processing it. Unfortunately the ad-hoc migration format |
| 2958 | * doesn't allow the destination to know the size to read without fully |
| 2959 | * parsing it through each devices load-state code (especially the open |
| 2960 | * coded devices that use get/put). |
| 2961 | * So we wrap the device state up in a package with a length at the start; |
| 2962 | * to do this we use a qemu_buf to hold the whole of the device state. |
| 2963 | */ |
Daniel P. Berrange | 61b67d4 | 2016-04-27 11:05:01 +0100 | [diff] [blame] | 2964 | bioc = qio_channel_buffer_new(4096); |
Daniel P. Berrange | 6f01f13 | 2016-09-30 11:57:14 +0100 | [diff] [blame] | 2965 | qio_channel_set_name(QIO_CHANNEL(bioc), "migration-postcopy-buffer"); |
Daniel P. Berrange | 61b67d4 | 2016-04-27 11:05:01 +0100 | [diff] [blame] | 2966 | fb = qemu_fopen_channel_output(QIO_CHANNEL(bioc)); |
| 2967 | object_unref(OBJECT(bioc)); |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2968 | |
Dr. David Alan Gilbert | c76201a | 2015-11-05 18:11:18 +0000 | [diff] [blame] | 2969 | /* |
| 2970 | * Make sure the receiver can get incoming pages before we send the rest |
| 2971 | * of the state |
| 2972 | */ |
| 2973 | qemu_savevm_send_postcopy_listen(fb); |
| 2974 | |
Fam Zheng | a1fbe75 | 2017-06-17 00:06:58 +0800 | [diff] [blame] | 2975 | qemu_savevm_state_complete_precopy(fb, false, false); |
Vladimir Sementsov-Ogievskiy | 58110f0 | 2017-07-10 19:30:16 +0300 | [diff] [blame] | 2976 | if (migrate_postcopy_ram()) { |
| 2977 | qemu_savevm_send_ping(fb, 3); |
| 2978 | } |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2979 | |
| 2980 | qemu_savevm_send_postcopy_run(fb); |
| 2981 | |
| 2982 | /* <><> end of stuff going into the package */ |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2983 | |
Dr. David Alan Gilbert | ef8d648 | 2017-02-02 15:59:09 +0000 | [diff] [blame] | 2984 | /* Last point of recovery; as soon as we send the package the destination |
| 2985 | * can open devices and potentially start running. |
| 2986 | * Lets just check again we've not got any errors. |
| 2987 | */ |
| 2988 | ret = qemu_file_get_error(ms->to_dst_file); |
| 2989 | if (ret) { |
| 2990 | error_report("postcopy_start: Migration stream errored (pre package)"); |
| 2991 | goto fail_closefb; |
| 2992 | } |
| 2993 | |
| 2994 | restart_block = false; |
| 2995 | |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2996 | /* Now send that blob */ |
Daniel P. Berrange | 61b67d4 | 2016-04-27 11:05:01 +0100 | [diff] [blame] | 2997 | if (qemu_savevm_send_packaged(ms->to_dst_file, bioc->data, bioc->usage)) { |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 2998 | goto fail_closefb; |
| 2999 | } |
| 3000 | qemu_fclose(fb); |
Dr. David Alan Gilbert | b82fc32 | 2016-02-22 17:17:32 +0000 | [diff] [blame] | 3001 | |
| 3002 | /* Send a notify to give a chance for anything that needs to happen |
| 3003 | * at the transition to postcopy and after the device state; in particular |
| 3004 | * spice needs to trigger a transition now |
| 3005 | */ |
| 3006 | ms->postcopy_after_devices = true; |
| 3007 | notifier_list_notify(&migration_state_notifiers, ms); |
| 3008 | |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3009 | ms->downtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - time_at_stop; |
| 3010 | |
| 3011 | qemu_mutex_unlock_iothread(); |
| 3012 | |
Vladimir Sementsov-Ogievskiy | 58110f0 | 2017-07-10 19:30:16 +0300 | [diff] [blame] | 3013 | if (migrate_postcopy_ram()) { |
| 3014 | /* |
| 3015 | * Although this ping is just for debug, it could potentially be |
| 3016 | * used for getting a better measurement of downtime at the source. |
| 3017 | */ |
| 3018 | qemu_savevm_send_ping(ms->to_dst_file, 4); |
| 3019 | } |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3020 | |
Pavel Butsykin | ced1c61 | 2017-02-03 18:23:21 +0300 | [diff] [blame] | 3021 | if (migrate_release_ram()) { |
| 3022 | ram_postcopy_migrated_memory_release(ms); |
| 3023 | } |
| 3024 | |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 3025 | ret = qemu_file_get_error(ms->to_dst_file); |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3026 | if (ret) { |
| 3027 | error_report("postcopy_start: Migration stream errored"); |
zhanghailiang | 48781e5 | 2015-12-16 11:47:33 +0000 | [diff] [blame] | 3028 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3029 | MIGRATION_STATUS_FAILED); |
| 3030 | } |
| 3031 | |
| 3032 | return ret; |
| 3033 | |
| 3034 | fail_closefb: |
| 3035 | qemu_fclose(fb); |
| 3036 | fail: |
zhanghailiang | 48781e5 | 2015-12-16 11:47:33 +0000 | [diff] [blame] | 3037 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3038 | MIGRATION_STATUS_FAILED); |
Dr. David Alan Gilbert | ef8d648 | 2017-02-02 15:59:09 +0000 | [diff] [blame] | 3039 | if (restart_block) { |
| 3040 | /* A failure happened early enough that we know the destination hasn't |
| 3041 | * accessed block devices, so we're safe to recover. |
| 3042 | */ |
| 3043 | Error *local_err = NULL; |
| 3044 | |
| 3045 | bdrv_invalidate_cache_all(&local_err); |
| 3046 | if (local_err) { |
| 3047 | error_report_err(local_err); |
| 3048 | } |
| 3049 | } |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3050 | qemu_mutex_unlock_iothread(); |
| 3051 | return -1; |
| 3052 | } |
| 3053 | |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3054 | /** |
Dr. David Alan Gilbert | e91d895 | 2017-10-20 10:05:52 +0100 | [diff] [blame] | 3055 | * migration_maybe_pause: Pause if required to by |
| 3056 | * migrate_pause_before_switchover called with the iothread locked |
| 3057 | * Returns: 0 on success |
| 3058 | */ |
Dr. David Alan Gilbert | 0331c8c | 2017-10-20 10:05:56 +0100 | [diff] [blame] | 3059 | static int migration_maybe_pause(MigrationState *s, |
| 3060 | int *current_active_state, |
| 3061 | int new_state) |
Dr. David Alan Gilbert | e91d895 | 2017-10-20 10:05:52 +0100 | [diff] [blame] | 3062 | { |
| 3063 | if (!migrate_pause_before_switchover()) { |
| 3064 | return 0; |
| 3065 | } |
| 3066 | |
| 3067 | /* Since leaving this state is not atomic with posting the semaphore |
| 3068 | * it's possible that someone could have issued multiple migrate_continue |
| 3069 | * and the semaphore is incorrectly positive at this point; |
| 3070 | * the docs say it's undefined to reinit a semaphore that's already |
| 3071 | * init'd, so use timedwait to eat up any existing posts. |
| 3072 | */ |
| 3073 | while (qemu_sem_timedwait(&s->pause_sem, 1) == 0) { |
| 3074 | /* This block intentionally left blank */ |
| 3075 | } |
| 3076 | |
Zhimin Feng | 8958338 | 2020-01-14 17:43:09 +0800 | [diff] [blame] | 3077 | /* |
| 3078 | * If the migration is cancelled when it is in the completion phase, |
| 3079 | * the migration state is set to MIGRATION_STATUS_CANCELLING. |
| 3080 | * So we don't need to wait a semaphore, otherwise we would always |
| 3081 | * wait for the 'pause_sem' semaphore. |
| 3082 | */ |
| 3083 | if (s->state != MIGRATION_STATUS_CANCELLING) { |
| 3084 | qemu_mutex_unlock_iothread(); |
| 3085 | migrate_set_state(&s->state, *current_active_state, |
| 3086 | MIGRATION_STATUS_PRE_SWITCHOVER); |
| 3087 | qemu_sem_wait(&s->pause_sem); |
| 3088 | migrate_set_state(&s->state, MIGRATION_STATUS_PRE_SWITCHOVER, |
| 3089 | new_state); |
| 3090 | *current_active_state = new_state; |
| 3091 | qemu_mutex_lock_iothread(); |
| 3092 | } |
Dr. David Alan Gilbert | e91d895 | 2017-10-20 10:05:52 +0100 | [diff] [blame] | 3093 | |
Dr. David Alan Gilbert | 0331c8c | 2017-10-20 10:05:56 +0100 | [diff] [blame] | 3094 | return s->state == new_state ? 0 : -EINVAL; |
Dr. David Alan Gilbert | e91d895 | 2017-10-20 10:05:52 +0100 | [diff] [blame] | 3095 | } |
| 3096 | |
| 3097 | /** |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3098 | * migration_completion: Used by migration_thread when there's not much left. |
| 3099 | * The caller 'breaks' the loop when this returns. |
| 3100 | * |
| 3101 | * @s: Current migration state |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3102 | */ |
Peter Xu | 2ad8730 | 2018-01-03 20:20:14 +0800 | [diff] [blame] | 3103 | static void migration_completion(MigrationState *s) |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3104 | { |
| 3105 | int ret; |
Peter Xu | 2ad8730 | 2018-01-03 20:20:14 +0800 | [diff] [blame] | 3106 | int current_active_state = s->state; |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3107 | |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3108 | if (s->state == MIGRATION_STATUS_ACTIVE) { |
| 3109 | qemu_mutex_lock_iothread(); |
Peter Xu | 64909f9 | 2018-01-03 20:20:10 +0800 | [diff] [blame] | 3110 | s->downtime_start = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
Daniel Henrique Barboza | fb06411 | 2018-12-05 17:47:01 -0200 | [diff] [blame] | 3111 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); |
Peter Xu | 7287cbd | 2018-01-03 20:20:09 +0800 | [diff] [blame] | 3112 | s->vm_was_running = runstate_is_running(); |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3113 | ret = global_state_store(); |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3114 | |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3115 | if (!ret) { |
Fam Zheng | a1fbe75 | 2017-06-17 00:06:58 +0800 | [diff] [blame] | 3116 | bool inactivate = !migrate_colo_enabled(); |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3117 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); |
Daniel P. Berrangé | 626ff65 | 2021-04-15 14:33:51 +0100 | [diff] [blame^] | 3118 | trace_migration_completion_vm_stop(ret); |
Kevin Wolf | f07fa4c | 2017-05-22 17:10:38 +0200 | [diff] [blame] | 3119 | if (ret >= 0) { |
Dr. David Alan Gilbert | 0331c8c | 2017-10-20 10:05:56 +0100 | [diff] [blame] | 3120 | ret = migration_maybe_pause(s, ¤t_active_state, |
| 3121 | MIGRATION_STATUS_DEVICE); |
Dr. David Alan Gilbert | e91d895 | 2017-10-20 10:05:52 +0100 | [diff] [blame] | 3122 | } |
| 3123 | if (ret >= 0) { |
Kevin Wolf | f07fa4c | 2017-05-22 17:10:38 +0200 | [diff] [blame] | 3124 | qemu_file_set_rate_limit(s->to_dst_file, INT64_MAX); |
Fam Zheng | a1fbe75 | 2017-06-17 00:06:58 +0800 | [diff] [blame] | 3125 | ret = qemu_savevm_state_complete_precopy(s->to_dst_file, false, |
| 3126 | inactivate); |
Kevin Wolf | f07fa4c | 2017-05-22 17:10:38 +0200 | [diff] [blame] | 3127 | } |
Fam Zheng | a1fbe75 | 2017-06-17 00:06:58 +0800 | [diff] [blame] | 3128 | if (inactivate && ret >= 0) { |
| 3129 | s->block_inactive = true; |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3130 | } |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3131 | } |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3132 | qemu_mutex_unlock_iothread(); |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3133 | |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3134 | if (ret < 0) { |
| 3135 | goto fail; |
| 3136 | } |
| 3137 | } else if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { |
| 3138 | trace_migration_completion_postcopy_end(); |
| 3139 | |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 3140 | qemu_savevm_state_complete_postcopy(s->to_dst_file); |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3141 | trace_migration_completion_postcopy_end_after_complete(); |
Longpeng(Mike) | 6ba1121 | 2020-11-05 17:17:26 +0800 | [diff] [blame] | 3142 | } else if (s->state == MIGRATION_STATUS_CANCELLING) { |
| 3143 | goto fail; |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3144 | } |
| 3145 | |
| 3146 | /* |
| 3147 | * If rp was opened we must clean up the thread before |
| 3148 | * cleaning everything else up (since if there are no failures |
| 3149 | * it will wait for the destination to send it's status in |
| 3150 | * a SHUT command). |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3151 | */ |
Peter Xu | 0425dc9 | 2017-05-31 18:35:34 +0800 | [diff] [blame] | 3152 | if (s->rp_state.from_dst_file) { |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3153 | int rp_error; |
Peter Xu | 0425dc9 | 2017-05-31 18:35:34 +0800 | [diff] [blame] | 3154 | trace_migration_return_path_end_before(); |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3155 | rp_error = await_return_path_close_on_source(s); |
Peter Xu | 0425dc9 | 2017-05-31 18:35:34 +0800 | [diff] [blame] | 3156 | trace_migration_return_path_end_after(rp_error); |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3157 | if (rp_error) { |
Greg Kurz | fe904ea | 2016-05-18 15:44:36 +0200 | [diff] [blame] | 3158 | goto fail_invalidate; |
Dr. David Alan Gilbert | b10ac0c | 2015-11-05 18:11:06 +0000 | [diff] [blame] | 3159 | } |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3160 | } |
| 3161 | |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 3162 | if (qemu_file_get_error(s->to_dst_file)) { |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3163 | trace_migration_completion_file_err(); |
Greg Kurz | fe904ea | 2016-05-18 15:44:36 +0200 | [diff] [blame] | 3164 | goto fail_invalidate; |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3165 | } |
| 3166 | |
zhanghailiang | 0b827d5 | 2016-10-27 14:42:54 +0800 | [diff] [blame] | 3167 | if (!migrate_colo_enabled()) { |
| 3168 | migrate_set_state(&s->state, current_active_state, |
| 3169 | MIGRATION_STATUS_COMPLETED); |
| 3170 | } |
| 3171 | |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3172 | return; |
| 3173 | |
Greg Kurz | fe904ea | 2016-05-18 15:44:36 +0200 | [diff] [blame] | 3174 | fail_invalidate: |
| 3175 | /* If not doing postcopy, vm_start() will be called: let's regain |
| 3176 | * control on images. |
| 3177 | */ |
Dr. David Alan Gilbert | 6039dd5 | 2018-02-05 09:13:37 +0000 | [diff] [blame] | 3178 | if (s->state == MIGRATION_STATUS_ACTIVE || |
| 3179 | s->state == MIGRATION_STATUS_DEVICE) { |
Greg Kurz | fe904ea | 2016-05-18 15:44:36 +0200 | [diff] [blame] | 3180 | Error *local_err = NULL; |
| 3181 | |
zhanghailiang | 1d2acc3 | 2017-01-24 15:59:52 +0800 | [diff] [blame] | 3182 | qemu_mutex_lock_iothread(); |
Greg Kurz | fe904ea | 2016-05-18 15:44:36 +0200 | [diff] [blame] | 3183 | bdrv_invalidate_cache_all(&local_err); |
| 3184 | if (local_err) { |
| 3185 | error_report_err(local_err); |
zhanghailiang | 1d2acc3 | 2017-01-24 15:59:52 +0800 | [diff] [blame] | 3186 | } else { |
| 3187 | s->block_inactive = false; |
Greg Kurz | fe904ea | 2016-05-18 15:44:36 +0200 | [diff] [blame] | 3188 | } |
zhanghailiang | 1d2acc3 | 2017-01-24 15:59:52 +0800 | [diff] [blame] | 3189 | qemu_mutex_unlock_iothread(); |
Greg Kurz | fe904ea | 2016-05-18 15:44:36 +0200 | [diff] [blame] | 3190 | } |
| 3191 | |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3192 | fail: |
zhanghailiang | 48781e5 | 2015-12-16 11:47:33 +0000 | [diff] [blame] | 3193 | migrate_set_state(&s->state, current_active_state, |
| 3194 | MIGRATION_STATUS_FAILED); |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3195 | } |
| 3196 | |
Andrey Gruzdev | 8518278 | 2021-01-29 13:14:06 +0300 | [diff] [blame] | 3197 | /** |
| 3198 | * bg_migration_completion: Used by bg_migration_thread when after all the |
| 3199 | * RAM has been saved. The caller 'breaks' the loop when this returns. |
| 3200 | * |
| 3201 | * @s: Current migration state |
| 3202 | */ |
| 3203 | static void bg_migration_completion(MigrationState *s) |
| 3204 | { |
| 3205 | int current_active_state = s->state; |
| 3206 | |
| 3207 | /* |
| 3208 | * Stop tracking RAM writes - un-protect memory, un-register UFFD |
| 3209 | * memory ranges, flush kernel wait queues and wake up threads |
| 3210 | * waiting for write fault to be resolved. |
| 3211 | */ |
| 3212 | ram_write_tracking_stop(); |
| 3213 | |
| 3214 | if (s->state == MIGRATION_STATUS_ACTIVE) { |
| 3215 | /* |
| 3216 | * By this moment we have RAM content saved into the migration stream. |
| 3217 | * The next step is to flush the non-RAM content (device state) |
| 3218 | * right after the ram content. The device state has been stored into |
| 3219 | * the temporary buffer before RAM saving started. |
| 3220 | */ |
| 3221 | qemu_put_buffer(s->to_dst_file, s->bioc->data, s->bioc->usage); |
| 3222 | qemu_fflush(s->to_dst_file); |
| 3223 | } else if (s->state == MIGRATION_STATUS_CANCELLING) { |
| 3224 | goto fail; |
| 3225 | } |
| 3226 | |
| 3227 | if (qemu_file_get_error(s->to_dst_file)) { |
| 3228 | trace_migration_completion_file_err(); |
| 3229 | goto fail; |
| 3230 | } |
| 3231 | |
| 3232 | migrate_set_state(&s->state, current_active_state, |
| 3233 | MIGRATION_STATUS_COMPLETED); |
| 3234 | return; |
| 3235 | |
| 3236 | fail: |
| 3237 | migrate_set_state(&s->state, current_active_state, |
| 3238 | MIGRATION_STATUS_FAILED); |
| 3239 | } |
| 3240 | |
zhanghailiang | 35a6ed4 | 2016-10-27 14:42:52 +0800 | [diff] [blame] | 3241 | bool migrate_colo_enabled(void) |
| 3242 | { |
| 3243 | MigrationState *s = migrate_get_current(); |
| 3244 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_COLO]; |
| 3245 | } |
| 3246 | |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3247 | typedef enum MigThrError { |
| 3248 | /* No error detected */ |
| 3249 | MIG_THR_ERR_NONE = 0, |
| 3250 | /* Detected error, but resumed successfully */ |
| 3251 | MIG_THR_ERR_RECOVERED = 1, |
| 3252 | /* Detected fatal error, need to exit */ |
| 3253 | MIG_THR_ERR_FATAL = 2, |
| 3254 | } MigThrError; |
| 3255 | |
Peter Xu | 9419069 | 2018-05-02 18:47:34 +0800 | [diff] [blame] | 3256 | static int postcopy_resume_handshake(MigrationState *s) |
| 3257 | { |
| 3258 | qemu_savevm_send_postcopy_resume(s->to_dst_file); |
| 3259 | |
| 3260 | while (s->state == MIGRATION_STATUS_POSTCOPY_RECOVER) { |
| 3261 | qemu_sem_wait(&s->rp_state.rp_sem); |
| 3262 | } |
| 3263 | |
| 3264 | if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { |
| 3265 | return 0; |
| 3266 | } |
| 3267 | |
| 3268 | return -1; |
| 3269 | } |
| 3270 | |
Peter Xu | 135b87b | 2018-05-02 18:47:25 +0800 | [diff] [blame] | 3271 | /* Return zero if success, or <0 for error */ |
| 3272 | static int postcopy_do_resume(MigrationState *s) |
| 3273 | { |
Peter Xu | d1b8ead | 2018-05-02 18:47:31 +0800 | [diff] [blame] | 3274 | int ret; |
| 3275 | |
| 3276 | /* |
| 3277 | * Call all the resume_prepare() hooks, so that modules can be |
| 3278 | * ready for the migration resume. |
| 3279 | */ |
| 3280 | ret = qemu_savevm_state_resume_prepare(s); |
| 3281 | if (ret) { |
| 3282 | error_report("%s: resume_prepare() failure detected: %d", |
| 3283 | __func__, ret); |
| 3284 | return ret; |
| 3285 | } |
| 3286 | |
| 3287 | /* |
Peter Xu | 9419069 | 2018-05-02 18:47:34 +0800 | [diff] [blame] | 3288 | * Last handshake with destination on the resume (destination will |
| 3289 | * switch to postcopy-active afterwards) |
Peter Xu | d1b8ead | 2018-05-02 18:47:31 +0800 | [diff] [blame] | 3290 | */ |
Peter Xu | 9419069 | 2018-05-02 18:47:34 +0800 | [diff] [blame] | 3291 | ret = postcopy_resume_handshake(s); |
| 3292 | if (ret) { |
| 3293 | error_report("%s: handshake failed: %d", __func__, ret); |
| 3294 | return ret; |
| 3295 | } |
Peter Xu | d1b8ead | 2018-05-02 18:47:31 +0800 | [diff] [blame] | 3296 | |
Peter Xu | 135b87b | 2018-05-02 18:47:25 +0800 | [diff] [blame] | 3297 | return 0; |
| 3298 | } |
| 3299 | |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3300 | /* |
| 3301 | * We don't return until we are in a safe state to continue current |
| 3302 | * postcopy migration. Returns MIG_THR_ERR_RECOVERED if recovered, or |
| 3303 | * MIG_THR_ERR_FATAL if unrecovery failure happened. |
| 3304 | */ |
| 3305 | static MigThrError postcopy_pause(MigrationState *s) |
| 3306 | { |
| 3307 | assert(s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3308 | |
Peter Xu | 135b87b | 2018-05-02 18:47:25 +0800 | [diff] [blame] | 3309 | while (true) { |
Peter Xu | 62df066 | 2018-05-02 18:47:38 +0800 | [diff] [blame] | 3310 | QEMUFile *file; |
| 3311 | |
Peter Xu | 135b87b | 2018-05-02 18:47:25 +0800 | [diff] [blame] | 3312 | /* Current channel is possibly broken. Release it. */ |
| 3313 | assert(s->to_dst_file); |
Peter Xu | 62df066 | 2018-05-02 18:47:38 +0800 | [diff] [blame] | 3314 | qemu_mutex_lock(&s->qemu_file_lock); |
| 3315 | file = s->to_dst_file; |
Peter Xu | 135b87b | 2018-05-02 18:47:25 +0800 | [diff] [blame] | 3316 | s->to_dst_file = NULL; |
Peter Xu | 62df066 | 2018-05-02 18:47:38 +0800 | [diff] [blame] | 3317 | qemu_mutex_unlock(&s->qemu_file_lock); |
| 3318 | |
| 3319 | qemu_file_shutdown(file); |
| 3320 | qemu_fclose(file); |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3321 | |
Peter Xu | d246ea5 | 2020-10-21 17:27:20 -0400 | [diff] [blame] | 3322 | migrate_set_state(&s->state, s->state, |
| 3323 | MIGRATION_STATUS_POSTCOPY_PAUSED); |
| 3324 | |
Peter Xu | 135b87b | 2018-05-02 18:47:25 +0800 | [diff] [blame] | 3325 | error_report("Detected IO failure for postcopy. " |
| 3326 | "Migration paused."); |
| 3327 | |
| 3328 | /* |
| 3329 | * We wait until things fixed up. Then someone will setup the |
| 3330 | * status back for us. |
| 3331 | */ |
| 3332 | while (s->state == MIGRATION_STATUS_POSTCOPY_PAUSED) { |
| 3333 | qemu_sem_wait(&s->postcopy_pause_sem); |
| 3334 | } |
| 3335 | |
| 3336 | if (s->state == MIGRATION_STATUS_POSTCOPY_RECOVER) { |
| 3337 | /* Woken up by a recover procedure. Give it a shot */ |
| 3338 | |
| 3339 | /* |
| 3340 | * Firstly, let's wake up the return path now, with a new |
| 3341 | * return path channel. |
| 3342 | */ |
| 3343 | qemu_sem_post(&s->postcopy_pause_rp_sem); |
| 3344 | |
| 3345 | /* Do the resume logic */ |
| 3346 | if (postcopy_do_resume(s) == 0) { |
| 3347 | /* Let's continue! */ |
| 3348 | trace_postcopy_pause_continued(); |
| 3349 | return MIG_THR_ERR_RECOVERED; |
| 3350 | } else { |
| 3351 | /* |
| 3352 | * Something wrong happened during the recovery, let's |
| 3353 | * pause again. Pause is always better than throwing |
| 3354 | * data away. |
| 3355 | */ |
| 3356 | continue; |
| 3357 | } |
| 3358 | } else { |
| 3359 | /* This is not right... Time to quit. */ |
| 3360 | return MIG_THR_ERR_FATAL; |
| 3361 | } |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3362 | } |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3363 | } |
| 3364 | |
| 3365 | static MigThrError migration_detect_error(MigrationState *s) |
| 3366 | { |
| 3367 | int ret; |
Dr. David Alan Gilbert | c3c5eae | 2019-02-19 19:59:28 +0000 | [diff] [blame] | 3368 | int state = s->state; |
Yury Kotov | 3d661c8 | 2019-04-22 13:34:20 +0300 | [diff] [blame] | 3369 | Error *local_error = NULL; |
Dr. David Alan Gilbert | c3c5eae | 2019-02-19 19:59:28 +0000 | [diff] [blame] | 3370 | |
| 3371 | if (state == MIGRATION_STATUS_CANCELLING || |
| 3372 | state == MIGRATION_STATUS_CANCELLED) { |
| 3373 | /* End the migration, but don't set the state to failed */ |
| 3374 | return MIG_THR_ERR_FATAL; |
| 3375 | } |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3376 | |
| 3377 | /* Try to detect any file errors */ |
Yury Kotov | 3d661c8 | 2019-04-22 13:34:20 +0300 | [diff] [blame] | 3378 | ret = qemu_file_get_error_obj(s->to_dst_file, &local_error); |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3379 | if (!ret) { |
| 3380 | /* Everything is fine */ |
Yury Kotov | 3d661c8 | 2019-04-22 13:34:20 +0300 | [diff] [blame] | 3381 | assert(!local_error); |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3382 | return MIG_THR_ERR_NONE; |
| 3383 | } |
| 3384 | |
Yury Kotov | 3d661c8 | 2019-04-22 13:34:20 +0300 | [diff] [blame] | 3385 | if (local_error) { |
| 3386 | migrate_set_error(s, local_error); |
| 3387 | error_free(local_error); |
| 3388 | } |
| 3389 | |
Dr. David Alan Gilbert | c3c5eae | 2019-02-19 19:59:28 +0000 | [diff] [blame] | 3390 | if (state == MIGRATION_STATUS_POSTCOPY_ACTIVE && ret == -EIO) { |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3391 | /* |
| 3392 | * For postcopy, we allow the network to be down for a |
| 3393 | * while. After that, it can be continued by a |
| 3394 | * recovery phase. |
| 3395 | */ |
| 3396 | return postcopy_pause(s); |
| 3397 | } else { |
| 3398 | /* |
| 3399 | * For precopy (or postcopy with error outside IO), we fail |
| 3400 | * with no time. |
| 3401 | */ |
Dr. David Alan Gilbert | c3c5eae | 2019-02-19 19:59:28 +0000 | [diff] [blame] | 3402 | migrate_set_state(&s->state, state, MIGRATION_STATUS_FAILED); |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3403 | trace_migration_thread_file_err(); |
| 3404 | |
| 3405 | /* Time to stop the migration, now. */ |
| 3406 | return MIG_THR_ERR_FATAL; |
| 3407 | } |
| 3408 | } |
| 3409 | |
Wei Yang | 268dcd4 | 2019-09-12 10:49:57 +0800 | [diff] [blame] | 3410 | /* How many bytes have we transferred since the beginning of the migration */ |
Juan Quintela | 0c8f0ef | 2018-06-26 15:38:00 +0200 | [diff] [blame] | 3411 | static uint64_t migration_total_bytes(MigrationState *s) |
| 3412 | { |
Juan Quintela | b9ee2f7 | 2016-01-15 11:40:13 +0100 | [diff] [blame] | 3413 | return qemu_ftell(s->to_dst_file) + ram_counters.multifd_bytes; |
Juan Quintela | 0c8f0ef | 2018-06-26 15:38:00 +0200 | [diff] [blame] | 3414 | } |
| 3415 | |
Peter Xu | cf011f0 | 2018-01-03 20:20:11 +0800 | [diff] [blame] | 3416 | static void migration_calculate_complete(MigrationState *s) |
| 3417 | { |
Juan Quintela | 0c8f0ef | 2018-06-26 15:38:00 +0200 | [diff] [blame] | 3418 | uint64_t bytes = migration_total_bytes(s); |
Peter Xu | cf011f0 | 2018-01-03 20:20:11 +0800 | [diff] [blame] | 3419 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
Juan Quintela | 6cde6fb | 2018-06-26 15:26:35 +0200 | [diff] [blame] | 3420 | int64_t transfer_time; |
Peter Xu | cf011f0 | 2018-01-03 20:20:11 +0800 | [diff] [blame] | 3421 | |
| 3422 | s->total_time = end_time - s->start_time; |
| 3423 | if (!s->downtime) { |
| 3424 | /* |
| 3425 | * It's still not set, so we are precopy migration. For |
| 3426 | * postcopy, downtime is calculated during postcopy_start(). |
| 3427 | */ |
| 3428 | s->downtime = end_time - s->downtime_start; |
| 3429 | } |
| 3430 | |
Juan Quintela | 6cde6fb | 2018-06-26 15:26:35 +0200 | [diff] [blame] | 3431 | transfer_time = s->total_time - s->setup_time; |
| 3432 | if (transfer_time) { |
| 3433 | s->mbps = ((double) bytes * 8.0) / transfer_time / 1000; |
Peter Xu | cf011f0 | 2018-01-03 20:20:11 +0800 | [diff] [blame] | 3434 | } |
| 3435 | } |
| 3436 | |
Ivan Ren | 87f3bd8 | 2019-08-02 18:18:41 +0800 | [diff] [blame] | 3437 | static void update_iteration_initial_status(MigrationState *s) |
| 3438 | { |
| 3439 | /* |
| 3440 | * Update these three fields at the same time to avoid mismatch info lead |
| 3441 | * wrong speed calculation. |
| 3442 | */ |
| 3443 | s->iteration_start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
| 3444 | s->iteration_initial_bytes = migration_total_bytes(s); |
| 3445 | s->iteration_initial_pages = ram_get_total_transferred_pages(); |
| 3446 | } |
| 3447 | |
Peter Xu | b15df1a | 2018-01-03 20:20:13 +0800 | [diff] [blame] | 3448 | static void migration_update_counters(MigrationState *s, |
| 3449 | int64_t current_time) |
| 3450 | { |
Xiao Guangrong | aecbfe9 | 2019-01-11 14:37:30 +0800 | [diff] [blame] | 3451 | uint64_t transferred, transferred_pages, time_spent; |
Juan Quintela | 0c8f0ef | 2018-06-26 15:38:00 +0200 | [diff] [blame] | 3452 | uint64_t current_bytes; /* bytes transferred since the beginning */ |
Peter Xu | b15df1a | 2018-01-03 20:20:13 +0800 | [diff] [blame] | 3453 | double bandwidth; |
| 3454 | |
| 3455 | if (current_time < s->iteration_start_time + BUFFER_DELAY) { |
| 3456 | return; |
| 3457 | } |
| 3458 | |
Juan Quintela | 0c8f0ef | 2018-06-26 15:38:00 +0200 | [diff] [blame] | 3459 | current_bytes = migration_total_bytes(s); |
| 3460 | transferred = current_bytes - s->iteration_initial_bytes; |
Peter Xu | b15df1a | 2018-01-03 20:20:13 +0800 | [diff] [blame] | 3461 | time_spent = current_time - s->iteration_start_time; |
| 3462 | bandwidth = (double)transferred / time_spent; |
Wei Wang | 0781c1e | 2018-01-22 19:36:39 +0800 | [diff] [blame] | 3463 | s->threshold_size = bandwidth * s->parameters.downtime_limit; |
Peter Xu | b15df1a | 2018-01-03 20:20:13 +0800 | [diff] [blame] | 3464 | |
| 3465 | s->mbps = (((double) transferred * 8.0) / |
| 3466 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0; |
| 3467 | |
Xiao Guangrong | aecbfe9 | 2019-01-11 14:37:30 +0800 | [diff] [blame] | 3468 | transferred_pages = ram_get_total_transferred_pages() - |
| 3469 | s->iteration_initial_pages; |
| 3470 | s->pages_per_second = (double) transferred_pages / |
| 3471 | (((double) time_spent / 1000.0)); |
| 3472 | |
Peter Xu | b15df1a | 2018-01-03 20:20:13 +0800 | [diff] [blame] | 3473 | /* |
| 3474 | * if we haven't sent anything, we don't want to |
| 3475 | * recalculate. 10000 is a small enough number for our purposes |
| 3476 | */ |
| 3477 | if (ram_counters.dirty_pages_rate && transferred > 10000) { |
Balamuruhan S | 650af89 | 2018-06-12 14:20:09 +0530 | [diff] [blame] | 3478 | s->expected_downtime = ram_counters.remaining / bandwidth; |
Peter Xu | b15df1a | 2018-01-03 20:20:13 +0800 | [diff] [blame] | 3479 | } |
| 3480 | |
| 3481 | qemu_file_reset_rate_limit(s->to_dst_file); |
| 3482 | |
Ivan Ren | 87f3bd8 | 2019-08-02 18:18:41 +0800 | [diff] [blame] | 3483 | update_iteration_initial_status(s); |
Peter Xu | b15df1a | 2018-01-03 20:20:13 +0800 | [diff] [blame] | 3484 | |
| 3485 | trace_migrate_transferred(transferred, time_spent, |
Wei Wang | 0781c1e | 2018-01-22 19:36:39 +0800 | [diff] [blame] | 3486 | bandwidth, s->threshold_size); |
Peter Xu | b15df1a | 2018-01-03 20:20:13 +0800 | [diff] [blame] | 3487 | } |
| 3488 | |
Peter Xu | 2ad8730 | 2018-01-03 20:20:14 +0800 | [diff] [blame] | 3489 | /* Migration thread iteration status */ |
| 3490 | typedef enum { |
| 3491 | MIG_ITERATE_RESUME, /* Resume current iteration */ |
| 3492 | MIG_ITERATE_SKIP, /* Skip current iteration */ |
| 3493 | MIG_ITERATE_BREAK, /* Break the loop */ |
| 3494 | } MigIterateState; |
| 3495 | |
| 3496 | /* |
| 3497 | * Return true if continue to the next iteration directly, false |
| 3498 | * otherwise. |
| 3499 | */ |
| 3500 | static MigIterateState migration_iteration_run(MigrationState *s) |
| 3501 | { |
Vladimir Sementsov-Ogievskiy | 4799502 | 2018-03-13 15:34:00 -0400 | [diff] [blame] | 3502 | uint64_t pending_size, pend_pre, pend_compat, pend_post; |
Peter Xu | 2ad8730 | 2018-01-03 20:20:14 +0800 | [diff] [blame] | 3503 | bool in_postcopy = s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE; |
| 3504 | |
Vladimir Sementsov-Ogievskiy | 4799502 | 2018-03-13 15:34:00 -0400 | [diff] [blame] | 3505 | qemu_savevm_state_pending(s->to_dst_file, s->threshold_size, &pend_pre, |
| 3506 | &pend_compat, &pend_post); |
| 3507 | pending_size = pend_pre + pend_compat + pend_post; |
Peter Xu | 2ad8730 | 2018-01-03 20:20:14 +0800 | [diff] [blame] | 3508 | |
| 3509 | trace_migrate_pending(pending_size, s->threshold_size, |
Vladimir Sementsov-Ogievskiy | 4799502 | 2018-03-13 15:34:00 -0400 | [diff] [blame] | 3510 | pend_pre, pend_compat, pend_post); |
Peter Xu | 2ad8730 | 2018-01-03 20:20:14 +0800 | [diff] [blame] | 3511 | |
| 3512 | if (pending_size && pending_size >= s->threshold_size) { |
| 3513 | /* Still a significant amount to transfer */ |
Wei Yang | 52aec70 | 2019-07-18 16:37:47 +0800 | [diff] [blame] | 3514 | if (!in_postcopy && pend_pre <= s->threshold_size && |
Stefan Hajnoczi | d73415a | 2020-09-23 11:56:46 +0100 | [diff] [blame] | 3515 | qatomic_read(&s->start_postcopy)) { |
Peter Xu | 2ad8730 | 2018-01-03 20:20:14 +0800 | [diff] [blame] | 3516 | if (postcopy_start(s)) { |
| 3517 | error_report("%s: postcopy failed to start", __func__); |
| 3518 | } |
| 3519 | return MIG_ITERATE_SKIP; |
| 3520 | } |
| 3521 | /* Just another iteration step */ |
Wei Yang | 17d9351 | 2019-10-06 06:05:16 +0800 | [diff] [blame] | 3522 | qemu_savevm_state_iterate(s->to_dst_file, in_postcopy); |
Peter Xu | 2ad8730 | 2018-01-03 20:20:14 +0800 | [diff] [blame] | 3523 | } else { |
| 3524 | trace_migration_thread_low_pending(pending_size); |
| 3525 | migration_completion(s); |
| 3526 | return MIG_ITERATE_BREAK; |
| 3527 | } |
| 3528 | |
| 3529 | return MIG_ITERATE_RESUME; |
| 3530 | } |
| 3531 | |
Peter Xu | 199aa6d | 2018-01-03 20:20:15 +0800 | [diff] [blame] | 3532 | static void migration_iteration_finish(MigrationState *s) |
| 3533 | { |
| 3534 | /* If we enabled cpu throttling for auto-converge, turn it off. */ |
| 3535 | cpu_throttle_stop(); |
| 3536 | |
| 3537 | qemu_mutex_lock_iothread(); |
| 3538 | switch (s->state) { |
| 3539 | case MIGRATION_STATUS_COMPLETED: |
| 3540 | migration_calculate_complete(s); |
| 3541 | runstate_set(RUN_STATE_POSTMIGRATE); |
| 3542 | break; |
| 3543 | |
| 3544 | case MIGRATION_STATUS_ACTIVE: |
| 3545 | /* |
| 3546 | * We should really assert here, but since it's during |
| 3547 | * migration, let's try to reduce the usage of assertions. |
| 3548 | */ |
| 3549 | if (!migrate_colo_enabled()) { |
| 3550 | error_report("%s: critical error: calling COLO code without " |
| 3551 | "COLO enabled", __func__); |
| 3552 | } |
| 3553 | migrate_start_colo_process(s); |
| 3554 | /* |
| 3555 | * Fixme: we will run VM in COLO no matter its old running state. |
| 3556 | * After exited COLO, we will keep running. |
| 3557 | */ |
| 3558 | s->vm_was_running = true; |
| 3559 | /* Fallthrough */ |
| 3560 | case MIGRATION_STATUS_FAILED: |
| 3561 | case MIGRATION_STATUS_CANCELLED: |
Dr. David Alan Gilbert | 57225e5 | 2018-07-19 10:22:57 +0100 | [diff] [blame] | 3562 | case MIGRATION_STATUS_CANCELLING: |
Peter Xu | 199aa6d | 2018-01-03 20:20:15 +0800 | [diff] [blame] | 3563 | if (s->vm_was_running) { |
| 3564 | vm_start(); |
| 3565 | } else { |
| 3566 | if (runstate_check(RUN_STATE_FINISH_MIGRATE)) { |
| 3567 | runstate_set(RUN_STATE_POSTMIGRATE); |
| 3568 | } |
| 3569 | } |
| 3570 | break; |
| 3571 | |
| 3572 | default: |
| 3573 | /* Should not reach here, but if so, forgive the VM. */ |
| 3574 | error_report("%s: Unknown ending state %d", __func__, s->state); |
| 3575 | break; |
| 3576 | } |
Yury Kotov | fd392cf | 2019-04-08 14:33:43 +0300 | [diff] [blame] | 3577 | migrate_fd_cleanup_schedule(s); |
Peter Xu | 199aa6d | 2018-01-03 20:20:15 +0800 | [diff] [blame] | 3578 | qemu_mutex_unlock_iothread(); |
| 3579 | } |
| 3580 | |
Andrey Gruzdev | 8518278 | 2021-01-29 13:14:06 +0300 | [diff] [blame] | 3581 | static void bg_migration_iteration_finish(MigrationState *s) |
| 3582 | { |
| 3583 | qemu_mutex_lock_iothread(); |
| 3584 | switch (s->state) { |
| 3585 | case MIGRATION_STATUS_COMPLETED: |
| 3586 | migration_calculate_complete(s); |
| 3587 | break; |
| 3588 | |
| 3589 | case MIGRATION_STATUS_ACTIVE: |
| 3590 | case MIGRATION_STATUS_FAILED: |
| 3591 | case MIGRATION_STATUS_CANCELLED: |
| 3592 | case MIGRATION_STATUS_CANCELLING: |
| 3593 | break; |
| 3594 | |
| 3595 | default: |
| 3596 | /* Should not reach here, but if so, forgive the VM. */ |
| 3597 | error_report("%s: Unknown ending state %d", __func__, s->state); |
| 3598 | break; |
| 3599 | } |
| 3600 | |
| 3601 | migrate_fd_cleanup_schedule(s); |
| 3602 | qemu_mutex_unlock_iothread(); |
| 3603 | } |
| 3604 | |
| 3605 | /* |
| 3606 | * Return true if continue to the next iteration directly, false |
| 3607 | * otherwise. |
| 3608 | */ |
| 3609 | static MigIterateState bg_migration_iteration_run(MigrationState *s) |
| 3610 | { |
| 3611 | int res; |
| 3612 | |
| 3613 | res = qemu_savevm_state_iterate(s->to_dst_file, false); |
| 3614 | if (res > 0) { |
| 3615 | bg_migration_completion(s); |
| 3616 | return MIG_ITERATE_BREAK; |
| 3617 | } |
| 3618 | |
| 3619 | return MIG_ITERATE_RESUME; |
| 3620 | } |
| 3621 | |
Dr. David Alan Gilbert | ad767be | 2018-06-13 11:26:41 +0100 | [diff] [blame] | 3622 | void migration_make_urgent_request(void) |
| 3623 | { |
| 3624 | qemu_sem_post(&migrate_get_current()->rate_limit_sem); |
| 3625 | } |
| 3626 | |
| 3627 | void migration_consume_urgent_request(void) |
| 3628 | { |
| 3629 | qemu_sem_wait(&migrate_get_current()->rate_limit_sem); |
| 3630 | } |
| 3631 | |
Dr. David Alan Gilbert | 97e1e06 | 2019-12-05 10:29:18 +0000 | [diff] [blame] | 3632 | /* Returns true if the rate limiting was broken by an urgent request */ |
| 3633 | bool migration_rate_limit(void) |
| 3634 | { |
| 3635 | int64_t now = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
| 3636 | MigrationState *s = migrate_get_current(); |
| 3637 | |
| 3638 | bool urgent = false; |
| 3639 | migration_update_counters(s, now); |
| 3640 | if (qemu_file_rate_limit(s->to_dst_file)) { |
Lukas Straub | 7738612 | 2020-05-20 22:42:32 +0200 | [diff] [blame] | 3641 | |
| 3642 | if (qemu_file_get_error(s->to_dst_file)) { |
| 3643 | return false; |
| 3644 | } |
Dr. David Alan Gilbert | 97e1e06 | 2019-12-05 10:29:18 +0000 | [diff] [blame] | 3645 | /* |
| 3646 | * Wait for a delay to do rate limiting OR |
| 3647 | * something urgent to post the semaphore. |
| 3648 | */ |
| 3649 | int ms = s->iteration_start_time + BUFFER_DELAY - now; |
| 3650 | trace_migration_rate_limit_pre(ms); |
| 3651 | if (qemu_sem_timedwait(&s->rate_limit_sem, ms) == 0) { |
| 3652 | /* |
| 3653 | * We were woken by one or more urgent things but |
| 3654 | * the timedwait will have consumed one of them. |
| 3655 | * The service routine for the urgent wake will dec |
| 3656 | * the semaphore itself for each item it consumes, |
| 3657 | * so add this one we just eat back. |
| 3658 | */ |
| 3659 | qemu_sem_post(&s->rate_limit_sem); |
| 3660 | urgent = true; |
| 3661 | } |
| 3662 | trace_migration_rate_limit_post(urgent); |
| 3663 | } |
| 3664 | return urgent; |
| 3665 | } |
| 3666 | |
Dr. David Alan Gilbert | 70b2047 | 2015-11-05 18:10:49 +0000 | [diff] [blame] | 3667 | /* |
| 3668 | * Master migration thread on the source VM. |
| 3669 | * It drives the migration and pumps the data down the outgoing channel. |
| 3670 | */ |
Juan Quintela | 5f496a1 | 2013-02-22 17:36:30 +0100 | [diff] [blame] | 3671 | static void *migration_thread(void *opaque) |
Juan Quintela | 0d82d0e | 2012-10-03 14:18:33 +0200 | [diff] [blame] | 3672 | { |
Juan Quintela | 9848a40 | 2012-12-19 09:55:50 +0100 | [diff] [blame] | 3673 | MigrationState *s = opaque; |
Alex Bligh | bc72ad6 | 2013-08-21 16:03:08 +0100 | [diff] [blame] | 3674 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3675 | MigThrError thr_error; |
Dr. David Alan Gilbert | ad767be | 2018-06-13 11:26:41 +0100 | [diff] [blame] | 3676 | bool urgent = false; |
Juan Quintela | 76f5933 | 2012-10-03 20:16:24 +0200 | [diff] [blame] | 3677 | |
Paolo Bonzini | ab28bd2 | 2015-07-09 08:55:38 +0200 | [diff] [blame] | 3678 | rcu_register_thread(); |
| 3679 | |
Dr. David Alan Gilbert | 892ae71 | 2019-02-27 16:49:00 +0000 | [diff] [blame] | 3680 | object_ref(OBJECT(s)); |
Ivan Ren | 87f3bd8 | 2019-08-02 18:18:41 +0800 | [diff] [blame] | 3681 | update_iteration_initial_status(s); |
Peter Xu | b15df1a | 2018-01-03 20:20:13 +0800 | [diff] [blame] | 3682 | |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 3683 | qemu_savevm_state_header(s->to_dst_file); |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3684 | |
Peter Xu | 62a0265 | 2017-06-14 15:55:58 +0800 | [diff] [blame] | 3685 | /* |
| 3686 | * If we opened the return path, we need to make sure dst has it |
| 3687 | * opened as well. |
| 3688 | */ |
| 3689 | if (s->rp_state.from_dst_file) { |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3690 | /* Now tell the dest that it should open its end so it can reply */ |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 3691 | qemu_savevm_send_open_return_path(s->to_dst_file); |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3692 | |
| 3693 | /* And do a ping that will make stuff easier to debug */ |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 3694 | qemu_savevm_send_ping(s->to_dst_file, 1); |
Peter Xu | 0425dc9 | 2017-05-31 18:35:34 +0800 | [diff] [blame] | 3695 | } |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3696 | |
Vladimir Sementsov-Ogievskiy | 58110f0 | 2017-07-10 19:30:16 +0300 | [diff] [blame] | 3697 | if (migrate_postcopy()) { |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3698 | /* |
| 3699 | * Tell the destination that we *might* want to do postcopy later; |
| 3700 | * if the other end can't do postcopy it should fail now, nice and |
| 3701 | * early. |
| 3702 | */ |
zhanghailiang | 89a02a9 | 2016-01-15 11:37:42 +0800 | [diff] [blame] | 3703 | qemu_savevm_send_postcopy_advise(s->to_dst_file); |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3704 | } |
| 3705 | |
Zhang Chen | aad555c | 2018-09-03 12:38:47 +0800 | [diff] [blame] | 3706 | if (migrate_colo_enabled()) { |
| 3707 | /* Notify migration destination that we enable COLO */ |
| 3708 | qemu_savevm_send_colo_enable(s->to_dst_file); |
| 3709 | } |
| 3710 | |
Juan Quintela | 9907e84 | 2017-06-28 11:52:24 +0200 | [diff] [blame] | 3711 | qemu_savevm_state_setup(s->to_dst_file); |
Juan Quintela | 0d82d0e | 2012-10-03 14:18:33 +0200 | [diff] [blame] | 3712 | |
Keqian Zhu | d05de9e | 2020-02-04 13:08:41 +0800 | [diff] [blame] | 3713 | if (qemu_savevm_state_guest_unplug_pending()) { |
Jens Freimann | c7e0acd | 2019-10-29 12:49:02 +0100 | [diff] [blame] | 3714 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
| 3715 | MIGRATION_STATUS_WAIT_UNPLUG); |
| 3716 | |
| 3717 | while (s->state == MIGRATION_STATUS_WAIT_UNPLUG && |
| 3718 | qemu_savevm_state_guest_unplug_pending()) { |
| 3719 | qemu_sem_timedwait(&s->wait_unplug_sem, 250); |
| 3720 | } |
| 3721 | |
| 3722 | migrate_set_state(&s->state, MIGRATION_STATUS_WAIT_UNPLUG, |
| 3723 | MIGRATION_STATUS_ACTIVE); |
| 3724 | } |
| 3725 | |
Alex Bligh | bc72ad6 | 2013-08-21 16:03:08 +0100 | [diff] [blame] | 3726 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
zhanghailiang | 48781e5 | 2015-12-16 11:47:33 +0000 | [diff] [blame] | 3727 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
| 3728 | MIGRATION_STATUS_ACTIVE); |
Michael R. Hines | 29ae8a4 | 2013-07-22 10:01:57 -0400 | [diff] [blame] | 3729 | |
Dr. David Alan Gilbert | 9ec055a | 2015-11-05 18:10:58 +0000 | [diff] [blame] | 3730 | trace_migration_thread_setup_complete(); |
| 3731 | |
Wei Yang | 8f8d528 | 2019-07-17 08:53:41 +0800 | [diff] [blame] | 3732 | while (migration_is_active(s)) { |
Dr. David Alan Gilbert | ad767be | 2018-06-13 11:26:41 +0100 | [diff] [blame] | 3733 | if (urgent || !qemu_file_rate_limit(s->to_dst_file)) { |
Peter Xu | 2ad8730 | 2018-01-03 20:20:14 +0800 | [diff] [blame] | 3734 | MigIterateState iter_state = migration_iteration_run(s); |
| 3735 | if (iter_state == MIG_ITERATE_SKIP) { |
| 3736 | continue; |
| 3737 | } else if (iter_state == MIG_ITERATE_BREAK) { |
Dr. David Alan Gilbert | 09f6c85 | 2015-08-13 11:51:31 +0100 | [diff] [blame] | 3738 | break; |
Juan Quintela | c369f40 | 2012-10-03 20:33:34 +0200 | [diff] [blame] | 3739 | } |
| 3740 | } |
Paolo Bonzini | f4410a5 | 2013-02-22 17:36:20 +0100 | [diff] [blame] | 3741 | |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3742 | /* |
| 3743 | * Try to detect any kind of failures, and see whether we |
| 3744 | * should stop the migration now. |
| 3745 | */ |
| 3746 | thr_error = migration_detect_error(s); |
| 3747 | if (thr_error == MIG_THR_ERR_FATAL) { |
| 3748 | /* Stop migration */ |
Paolo Bonzini | fd45ee2 | 2013-02-22 17:36:33 +0100 | [diff] [blame] | 3749 | break; |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 3750 | } else if (thr_error == MIG_THR_ERR_RECOVERED) { |
| 3751 | /* |
| 3752 | * Just recovered from a e.g. network failure, reset all |
| 3753 | * the local variables. This is important to avoid |
| 3754 | * breaking transferred_bytes and bandwidth calculation |
| 3755 | */ |
Ivan Ren | 87f3bd8 | 2019-08-02 18:18:41 +0800 | [diff] [blame] | 3756 | update_iteration_initial_status(s); |
Paolo Bonzini | fd45ee2 | 2013-02-22 17:36:33 +0100 | [diff] [blame] | 3757 | } |
Peter Xu | b15df1a | 2018-01-03 20:20:13 +0800 | [diff] [blame] | 3758 | |
Dr. David Alan Gilbert | 97e1e06 | 2019-12-05 10:29:18 +0000 | [diff] [blame] | 3759 | urgent = migration_rate_limit(); |
Paolo Bonzini | a3fa1d7 | 2013-02-22 17:36:18 +0100 | [diff] [blame] | 3760 | } |
| 3761 | |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3762 | trace_migration_thread_after_loop(); |
Peter Xu | 199aa6d | 2018-01-03 20:20:15 +0800 | [diff] [blame] | 3763 | migration_iteration_finish(s); |
Dr. David Alan Gilbert | 892ae71 | 2019-02-27 16:49:00 +0000 | [diff] [blame] | 3764 | object_unref(OBJECT(s)); |
Paolo Bonzini | ab28bd2 | 2015-07-09 08:55:38 +0200 | [diff] [blame] | 3765 | rcu_unregister_thread(); |
Juan Quintela | 0d82d0e | 2012-10-03 14:18:33 +0200 | [diff] [blame] | 3766 | return NULL; |
| 3767 | } |
| 3768 | |
Andrey Gruzdev | 8518278 | 2021-01-29 13:14:06 +0300 | [diff] [blame] | 3769 | static void bg_migration_vm_start_bh(void *opaque) |
| 3770 | { |
| 3771 | MigrationState *s = opaque; |
| 3772 | |
| 3773 | qemu_bh_delete(s->vm_start_bh); |
| 3774 | s->vm_start_bh = NULL; |
| 3775 | |
| 3776 | vm_start(); |
| 3777 | s->downtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - s->downtime_start; |
| 3778 | } |
| 3779 | |
| 3780 | /** |
| 3781 | * Background snapshot thread, based on live migration code. |
| 3782 | * This is an alternative implementation of live migration mechanism |
| 3783 | * introduced specifically to support background snapshots. |
| 3784 | * |
| 3785 | * It takes advantage of userfault_fd write protection mechanism introduced |
| 3786 | * in v5.7 kernel. Compared to existing dirty page logging migration much |
| 3787 | * lesser stream traffic is produced resulting in smaller snapshot images, |
| 3788 | * simply cause of no page duplicates can get into the stream. |
| 3789 | * |
| 3790 | * Another key point is that generated vmstate stream reflects machine state |
| 3791 | * 'frozen' at the beginning of snapshot creation compared to dirty page logging |
| 3792 | * mechanism, which effectively results in that saved snapshot is the state of VM |
| 3793 | * at the end of the process. |
| 3794 | */ |
| 3795 | static void *bg_migration_thread(void *opaque) |
| 3796 | { |
| 3797 | MigrationState *s = opaque; |
| 3798 | int64_t setup_start; |
| 3799 | MigThrError thr_error; |
| 3800 | QEMUFile *fb; |
| 3801 | bool early_fail = true; |
| 3802 | |
| 3803 | rcu_register_thread(); |
| 3804 | object_ref(OBJECT(s)); |
| 3805 | |
| 3806 | qemu_file_set_rate_limit(s->to_dst_file, INT64_MAX); |
| 3807 | |
| 3808 | setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); |
| 3809 | /* |
| 3810 | * We want to save vmstate for the moment when migration has been |
| 3811 | * initiated but also we want to save RAM content while VM is running. |
| 3812 | * The RAM content should appear first in the vmstate. So, we first |
| 3813 | * stash the non-RAM part of the vmstate to the temporary buffer, |
| 3814 | * then write RAM part of the vmstate to the migration stream |
| 3815 | * with vCPUs running and, finally, write stashed non-RAM part of |
| 3816 | * the vmstate from the buffer to the migration stream. |
| 3817 | */ |
Andrey Gruzdev | ecb23ef | 2021-04-01 12:22:23 +0300 | [diff] [blame] | 3818 | s->bioc = qio_channel_buffer_new(512 * 1024); |
Andrey Gruzdev | 8518278 | 2021-01-29 13:14:06 +0300 | [diff] [blame] | 3819 | qio_channel_set_name(QIO_CHANNEL(s->bioc), "vmstate-buffer"); |
| 3820 | fb = qemu_fopen_channel_output(QIO_CHANNEL(s->bioc)); |
| 3821 | object_unref(OBJECT(s->bioc)); |
| 3822 | |
| 3823 | update_iteration_initial_status(s); |
| 3824 | |
Andrey Gruzdev | eeccb99 | 2021-04-01 12:22:25 +0300 | [diff] [blame] | 3825 | /* |
| 3826 | * Prepare for tracking memory writes with UFFD-WP - populate |
| 3827 | * RAM pages before protecting. |
| 3828 | */ |
| 3829 | #ifdef __linux__ |
| 3830 | ram_write_tracking_prepare(); |
| 3831 | #endif |
| 3832 | |
Andrey Gruzdev | 8518278 | 2021-01-29 13:14:06 +0300 | [diff] [blame] | 3833 | qemu_savevm_state_header(s->to_dst_file); |
| 3834 | qemu_savevm_state_setup(s->to_dst_file); |
| 3835 | |
| 3836 | if (qemu_savevm_state_guest_unplug_pending()) { |
| 3837 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
| 3838 | MIGRATION_STATUS_WAIT_UNPLUG); |
| 3839 | |
| 3840 | while (s->state == MIGRATION_STATUS_WAIT_UNPLUG && |
| 3841 | qemu_savevm_state_guest_unplug_pending()) { |
| 3842 | qemu_sem_timedwait(&s->wait_unplug_sem, 250); |
| 3843 | } |
| 3844 | |
| 3845 | migrate_set_state(&s->state, MIGRATION_STATUS_WAIT_UNPLUG, |
| 3846 | MIGRATION_STATUS_ACTIVE); |
| 3847 | } else { |
| 3848 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
| 3849 | MIGRATION_STATUS_ACTIVE); |
| 3850 | } |
| 3851 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
| 3852 | |
| 3853 | trace_migration_thread_setup_complete(); |
| 3854 | s->downtime_start = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
| 3855 | |
| 3856 | qemu_mutex_lock_iothread(); |
| 3857 | |
| 3858 | /* |
| 3859 | * If VM is currently in suspended state, then, to make a valid runstate |
| 3860 | * transition in vm_stop_force_state() we need to wakeup it up. |
| 3861 | */ |
| 3862 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); |
| 3863 | s->vm_was_running = runstate_is_running(); |
| 3864 | |
| 3865 | if (global_state_store()) { |
| 3866 | goto fail; |
| 3867 | } |
| 3868 | /* Forcibly stop VM before saving state of vCPUs and devices */ |
| 3869 | if (vm_stop_force_state(RUN_STATE_PAUSED)) { |
| 3870 | goto fail; |
| 3871 | } |
| 3872 | /* |
| 3873 | * Put vCPUs in sync with shadow context structures, then |
| 3874 | * save their state to channel-buffer along with devices. |
| 3875 | */ |
| 3876 | cpu_synchronize_all_states(); |
| 3877 | if (qemu_savevm_state_complete_precopy_non_iterable(fb, false, false)) { |
| 3878 | goto fail; |
| 3879 | } |
Andrey Gruzdev | ecb23ef | 2021-04-01 12:22:23 +0300 | [diff] [blame] | 3880 | /* |
| 3881 | * Since we are going to get non-iterable state data directly |
| 3882 | * from s->bioc->data, explicit flush is needed here. |
| 3883 | */ |
| 3884 | qemu_fflush(fb); |
| 3885 | |
Andrey Gruzdev | 8518278 | 2021-01-29 13:14:06 +0300 | [diff] [blame] | 3886 | /* Now initialize UFFD context and start tracking RAM writes */ |
| 3887 | if (ram_write_tracking_start()) { |
| 3888 | goto fail; |
| 3889 | } |
| 3890 | early_fail = false; |
| 3891 | |
| 3892 | /* |
| 3893 | * Start VM from BH handler to avoid write-fault lock here. |
| 3894 | * UFFD-WP protection for the whole RAM is already enabled so |
| 3895 | * calling VM state change notifiers from vm_start() would initiate |
| 3896 | * writes to virtio VQs memory which is in write-protected region. |
| 3897 | */ |
| 3898 | s->vm_start_bh = qemu_bh_new(bg_migration_vm_start_bh, s); |
| 3899 | qemu_bh_schedule(s->vm_start_bh); |
| 3900 | |
| 3901 | qemu_mutex_unlock_iothread(); |
| 3902 | |
| 3903 | while (migration_is_active(s)) { |
| 3904 | MigIterateState iter_state = bg_migration_iteration_run(s); |
| 3905 | if (iter_state == MIG_ITERATE_SKIP) { |
| 3906 | continue; |
| 3907 | } else if (iter_state == MIG_ITERATE_BREAK) { |
| 3908 | break; |
| 3909 | } |
| 3910 | |
| 3911 | /* |
| 3912 | * Try to detect any kind of failures, and see whether we |
| 3913 | * should stop the migration now. |
| 3914 | */ |
| 3915 | thr_error = migration_detect_error(s); |
| 3916 | if (thr_error == MIG_THR_ERR_FATAL) { |
| 3917 | /* Stop migration */ |
| 3918 | break; |
| 3919 | } |
| 3920 | |
| 3921 | migration_update_counters(s, qemu_clock_get_ms(QEMU_CLOCK_REALTIME)); |
| 3922 | } |
| 3923 | |
| 3924 | trace_migration_thread_after_loop(); |
| 3925 | |
| 3926 | fail: |
| 3927 | if (early_fail) { |
| 3928 | migrate_set_state(&s->state, MIGRATION_STATUS_ACTIVE, |
| 3929 | MIGRATION_STATUS_FAILED); |
| 3930 | qemu_mutex_unlock_iothread(); |
| 3931 | } |
| 3932 | |
| 3933 | bg_migration_iteration_finish(s); |
| 3934 | |
| 3935 | qemu_fclose(fb); |
| 3936 | object_unref(OBJECT(s)); |
| 3937 | rcu_unregister_thread(); |
| 3938 | |
| 3939 | return NULL; |
| 3940 | } |
| 3941 | |
Dr. David Alan Gilbert | cce8040 | 2017-12-15 17:16:54 +0000 | [diff] [blame] | 3942 | void migrate_fd_connect(MigrationState *s, Error *error_in) |
Juan Quintela | 0d82d0e | 2012-10-03 14:18:33 +0200 | [diff] [blame] | 3943 | { |
Juan Quintela | 00f4b57 | 2019-06-12 11:33:27 +0200 | [diff] [blame] | 3944 | Error *local_err = NULL; |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 3945 | int64_t rate_limit; |
| 3946 | bool resume = s->state == MIGRATION_STATUS_POSTCOPY_PAUSED; |
| 3947 | |
Ashijeet Acharya | 2ff3025 | 2016-09-15 21:50:28 +0530 | [diff] [blame] | 3948 | s->expected_downtime = s->parameters.downtime_limit; |
Marc-André Lureau | 9cbc364 | 2020-03-25 19:47:21 +0100 | [diff] [blame] | 3949 | if (resume) { |
| 3950 | assert(s->cleanup_bh); |
| 3951 | } else { |
| 3952 | assert(!s->cleanup_bh); |
| 3953 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup_bh, s); |
| 3954 | } |
Dr. David Alan Gilbert | cce8040 | 2017-12-15 17:16:54 +0000 | [diff] [blame] | 3955 | if (error_in) { |
| 3956 | migrate_fd_error(s, error_in); |
| 3957 | migrate_fd_cleanup(s); |
| 3958 | return; |
| 3959 | } |
Juan Quintela | 0d82d0e | 2012-10-03 14:18:33 +0200 | [diff] [blame] | 3960 | |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 3961 | if (resume) { |
| 3962 | /* This is a resumed migration */ |
Peter Xu | 8504dde | 2019-09-06 21:01:03 +0800 | [diff] [blame] | 3963 | rate_limit = s->parameters.max_postcopy_bandwidth / |
| 3964 | XFER_LIMIT_RATIO; |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 3965 | } else { |
| 3966 | /* This is a fresh new migration */ |
| 3967 | rate_limit = s->parameters.max_bandwidth / XFER_LIMIT_RATIO; |
Paolo Bonzini | 442773c | 2013-02-22 17:36:44 +0100 | [diff] [blame] | 3968 | |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 3969 | /* Notify before starting migration thread */ |
| 3970 | notifier_list_notify(&migration_state_notifiers, s); |
| 3971 | } |
| 3972 | |
| 3973 | qemu_file_set_rate_limit(s->to_dst_file, rate_limit); |
| 3974 | qemu_file_set_blocking(s->to_dst_file, true); |
Stefan Hajnoczi | 9287ac2 | 2013-07-29 15:01:57 +0200 | [diff] [blame] | 3975 | |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3976 | /* |
Peter Xu | c788ada | 2017-06-26 18:28:55 +0800 | [diff] [blame] | 3977 | * Open the return path. For postcopy, it is used exclusively. For |
| 3978 | * precopy, only if user specified "return-path" capability would |
| 3979 | * QEMU uses the return path. |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3980 | */ |
Peter Xu | c788ada | 2017-06-26 18:28:55 +0800 | [diff] [blame] | 3981 | if (migrate_postcopy_ram() || migrate_use_return_path()) { |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 3982 | if (open_return_path_on_source(s, !resume)) { |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3983 | error_report("Unable to open return-path for postcopy"); |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 3984 | migrate_set_state(&s->state, s->state, MIGRATION_STATUS_FAILED); |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 3985 | migrate_fd_cleanup(s); |
| 3986 | return; |
| 3987 | } |
| 3988 | } |
| 3989 | |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 3990 | if (resume) { |
Peter Xu | 135b87b | 2018-05-02 18:47:25 +0800 | [diff] [blame] | 3991 | /* Wakeup the main migration thread to do the recovery */ |
| 3992 | migrate_set_state(&s->state, MIGRATION_STATUS_POSTCOPY_PAUSED, |
| 3993 | MIGRATION_STATUS_POSTCOPY_RECOVER); |
| 3994 | qemu_sem_post(&s->postcopy_pause_sem); |
Peter Xu | d3e35b8 | 2018-05-02 18:47:24 +0800 | [diff] [blame] | 3995 | return; |
| 3996 | } |
| 3997 | |
Juan Quintela | 00f4b57 | 2019-06-12 11:33:27 +0200 | [diff] [blame] | 3998 | if (multifd_save_setup(&local_err) != 0) { |
| 3999 | error_report_err(local_err); |
Juan Quintela | f986c3d | 2016-01-14 16:52:55 +0100 | [diff] [blame] | 4000 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
| 4001 | MIGRATION_STATUS_FAILED); |
| 4002 | migrate_fd_cleanup(s); |
| 4003 | return; |
| 4004 | } |
Andrey Gruzdev | 8518278 | 2021-01-29 13:14:06 +0300 | [diff] [blame] | 4005 | |
| 4006 | if (migrate_background_snapshot()) { |
| 4007 | qemu_thread_create(&s->thread, "bg_snapshot", |
| 4008 | bg_migration_thread, s, QEMU_THREAD_JOINABLE); |
| 4009 | } else { |
| 4010 | qemu_thread_create(&s->thread, "live_migration", |
| 4011 | migration_thread, s, QEMU_THREAD_JOINABLE); |
| 4012 | } |
Dr. David Alan Gilbert | 1d34e4b | 2015-11-05 18:11:05 +0000 | [diff] [blame] | 4013 | s->migration_thread_running = true; |
Juan Quintela | 0d82d0e | 2012-10-03 14:18:33 +0200 | [diff] [blame] | 4014 | } |
Dr. David Alan Gilbert | 093e3c4 | 2015-11-05 18:10:52 +0000 | [diff] [blame] | 4015 | |
Peter Xu | 9d18af9 | 2017-06-27 12:10:19 +0800 | [diff] [blame] | 4016 | void migration_global_dump(Monitor *mon) |
| 4017 | { |
| 4018 | MigrationState *ms = migrate_get_current(); |
| 4019 | |
Juan Quintela | 6f0f642 | 2017-10-26 11:49:57 +0200 | [diff] [blame] | 4020 | monitor_printf(mon, "globals:\n"); |
| 4021 | monitor_printf(mon, "store-global-state: %s\n", |
| 4022 | ms->store_global_state ? "on" : "off"); |
| 4023 | monitor_printf(mon, "only-migratable: %s\n", |
Markus Armbruster | 811f865 | 2019-04-01 11:08:24 +0200 | [diff] [blame] | 4024 | only_migratable ? "on" : "off"); |
Juan Quintela | 6f0f642 | 2017-10-26 11:49:57 +0200 | [diff] [blame] | 4025 | monitor_printf(mon, "send-configuration: %s\n", |
| 4026 | ms->send_configuration ? "on" : "off"); |
| 4027 | monitor_printf(mon, "send-section-footer: %s\n", |
| 4028 | ms->send_section_footer ? "on" : "off"); |
Xiao Guangrong | f548222 | 2018-05-03 16:06:11 +0800 | [diff] [blame] | 4029 | monitor_printf(mon, "decompress-error-check: %s\n", |
| 4030 | ms->decompress_error_check ? "on" : "off"); |
Peter Xu | 002cad6 | 2019-06-03 14:50:56 +0800 | [diff] [blame] | 4031 | monitor_printf(mon, "clear-bitmap-shift: %u\n", |
| 4032 | ms->clear_bitmap_shift); |
Peter Xu | 9d18af9 | 2017-06-27 12:10:19 +0800 | [diff] [blame] | 4033 | } |
| 4034 | |
Peter Xu | 2081475 | 2017-07-18 11:39:03 +0800 | [diff] [blame] | 4035 | #define DEFINE_PROP_MIG_CAP(name, x) \ |
| 4036 | DEFINE_PROP_BOOL(name, MigrationState, enabled_capabilities[x], false) |
| 4037 | |
Peter Xu | 5272298 | 2017-06-27 12:10:14 +0800 | [diff] [blame] | 4038 | static Property migration_properties[] = { |
| 4039 | DEFINE_PROP_BOOL("store-global-state", MigrationState, |
| 4040 | store_global_state, true), |
Peter Xu | 71dd4c1 | 2017-06-27 12:10:16 +0800 | [diff] [blame] | 4041 | DEFINE_PROP_BOOL("send-configuration", MigrationState, |
| 4042 | send_configuration, true), |
Peter Xu | 15c3850 | 2017-06-27 12:10:17 +0800 | [diff] [blame] | 4043 | DEFINE_PROP_BOOL("send-section-footer", MigrationState, |
| 4044 | send_section_footer, true), |
Xiao Guangrong | f548222 | 2018-05-03 16:06:11 +0800 | [diff] [blame] | 4045 | DEFINE_PROP_BOOL("decompress-error-check", MigrationState, |
| 4046 | decompress_error_check, true), |
Peter Xu | 002cad6 | 2019-06-03 14:50:56 +0800 | [diff] [blame] | 4047 | DEFINE_PROP_UINT8("x-clear-bitmap-shift", MigrationState, |
| 4048 | clear_bitmap_shift, CLEAR_BITMAP_SHIFT_DEFAULT), |
Peter Xu | 89632fa | 2017-07-18 11:39:02 +0800 | [diff] [blame] | 4049 | |
| 4050 | /* Migration parameters */ |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 4051 | DEFINE_PROP_UINT8("x-compress-level", MigrationState, |
Peter Xu | 89632fa | 2017-07-18 11:39:02 +0800 | [diff] [blame] | 4052 | parameters.compress_level, |
| 4053 | DEFAULT_MIGRATE_COMPRESS_LEVEL), |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 4054 | DEFINE_PROP_UINT8("x-compress-threads", MigrationState, |
Peter Xu | 89632fa | 2017-07-18 11:39:02 +0800 | [diff] [blame] | 4055 | parameters.compress_threads, |
| 4056 | DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT), |
Xiao Guangrong | 1d58872 | 2018-08-21 16:10:20 +0800 | [diff] [blame] | 4057 | DEFINE_PROP_BOOL("x-compress-wait-thread", MigrationState, |
| 4058 | parameters.compress_wait_thread, true), |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 4059 | DEFINE_PROP_UINT8("x-decompress-threads", MigrationState, |
Peter Xu | 89632fa | 2017-07-18 11:39:02 +0800 | [diff] [blame] | 4060 | parameters.decompress_threads, |
| 4061 | DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT), |
Keqian Zhu | dc14a47 | 2020-02-24 10:31:42 +0800 | [diff] [blame] | 4062 | DEFINE_PROP_UINT8("x-throttle-trigger-threshold", MigrationState, |
| 4063 | parameters.throttle_trigger_threshold, |
| 4064 | DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD), |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 4065 | DEFINE_PROP_UINT8("x-cpu-throttle-initial", MigrationState, |
Peter Xu | 89632fa | 2017-07-18 11:39:02 +0800 | [diff] [blame] | 4066 | parameters.cpu_throttle_initial, |
| 4067 | DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL), |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 4068 | DEFINE_PROP_UINT8("x-cpu-throttle-increment", MigrationState, |
Peter Xu | 89632fa | 2017-07-18 11:39:02 +0800 | [diff] [blame] | 4069 | parameters.cpu_throttle_increment, |
| 4070 | DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT), |
Keqian Zhu | cbbf818 | 2020-04-13 18:15:08 +0800 | [diff] [blame] | 4071 | DEFINE_PROP_BOOL("x-cpu-throttle-tailslow", MigrationState, |
| 4072 | parameters.cpu_throttle_tailslow, false), |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 4073 | DEFINE_PROP_SIZE("x-max-bandwidth", MigrationState, |
Peter Xu | 89632fa | 2017-07-18 11:39:02 +0800 | [diff] [blame] | 4074 | parameters.max_bandwidth, MAX_THROTTLE), |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 4075 | DEFINE_PROP_UINT64("x-downtime-limit", MigrationState, |
Peter Xu | 89632fa | 2017-07-18 11:39:02 +0800 | [diff] [blame] | 4076 | parameters.downtime_limit, |
| 4077 | DEFAULT_MIGRATE_SET_DOWNTIME), |
Juan Quintela | 741d408 | 2017-12-01 13:08:38 +0100 | [diff] [blame] | 4078 | DEFINE_PROP_UINT32("x-checkpoint-delay", MigrationState, |
Peter Xu | 89632fa | 2017-07-18 11:39:02 +0800 | [diff] [blame] | 4079 | parameters.x_checkpoint_delay, |
| 4080 | DEFAULT_MIGRATE_X_CHECKPOINT_DELAY), |
Juan Quintela | cbfd6c9 | 2019-02-06 13:54:06 +0100 | [diff] [blame] | 4081 | DEFINE_PROP_UINT8("multifd-channels", MigrationState, |
| 4082 | parameters.multifd_channels, |
Juan Quintela | 4075fb1 | 2016-01-15 08:56:17 +0100 | [diff] [blame] | 4083 | DEFAULT_MIGRATE_MULTIFD_CHANNELS), |
Juan Quintela | 96eef04 | 2019-01-16 10:35:55 +0100 | [diff] [blame] | 4084 | DEFINE_PROP_MULTIFD_COMPRESSION("multifd-compression", MigrationState, |
| 4085 | parameters.multifd_compression, |
| 4086 | DEFAULT_MIGRATE_MULTIFD_COMPRESSION), |
Juan Quintela | 9004db4 | 2020-01-23 17:08:52 +0100 | [diff] [blame] | 4087 | DEFINE_PROP_UINT8("multifd-zlib-level", MigrationState, |
| 4088 | parameters.multifd_zlib_level, |
| 4089 | DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL), |
Juan Quintela | 6a9ad15 | 2020-01-23 17:41:36 +0100 | [diff] [blame] | 4090 | DEFINE_PROP_UINT8("multifd-zstd-level", MigrationState, |
| 4091 | parameters.multifd_zstd_level, |
| 4092 | DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL), |
Juan Quintela | 73af8dd | 2017-10-05 21:30:10 +0200 | [diff] [blame] | 4093 | DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState, |
| 4094 | parameters.xbzrle_cache_size, |
| 4095 | DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE), |
Dr. David Alan Gilbert | 7e555c6 | 2018-06-13 11:26:40 +0100 | [diff] [blame] | 4096 | DEFINE_PROP_SIZE("max-postcopy-bandwidth", MigrationState, |
| 4097 | parameters.max_postcopy_bandwidth, |
| 4098 | DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH), |
Li Qiang | 4cbc9c7 | 2018-08-01 06:00:20 -0700 | [diff] [blame] | 4099 | DEFINE_PROP_UINT8("max-cpu-throttle", MigrationState, |
| 4100 | parameters.max_cpu_throttle, |
| 4101 | DEFAULT_MIGRATE_MAX_CPU_THROTTLE), |
Dr. David Alan Gilbert | ee3d96b | 2019-02-27 13:24:06 +0000 | [diff] [blame] | 4102 | DEFINE_PROP_SIZE("announce-initial", MigrationState, |
| 4103 | parameters.announce_initial, |
| 4104 | DEFAULT_MIGRATE_ANNOUNCE_INITIAL), |
| 4105 | DEFINE_PROP_SIZE("announce-max", MigrationState, |
| 4106 | parameters.announce_max, |
| 4107 | DEFAULT_MIGRATE_ANNOUNCE_MAX), |
| 4108 | DEFINE_PROP_SIZE("announce-rounds", MigrationState, |
| 4109 | parameters.announce_rounds, |
| 4110 | DEFAULT_MIGRATE_ANNOUNCE_ROUNDS), |
| 4111 | DEFINE_PROP_SIZE("announce-step", MigrationState, |
| 4112 | parameters.announce_step, |
| 4113 | DEFAULT_MIGRATE_ANNOUNCE_STEP), |
Peter Xu | 2081475 | 2017-07-18 11:39:03 +0800 | [diff] [blame] | 4114 | |
| 4115 | /* Migration capabilities */ |
| 4116 | DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), |
| 4117 | DEFINE_PROP_MIG_CAP("x-rdma-pin-all", MIGRATION_CAPABILITY_RDMA_PIN_ALL), |
| 4118 | DEFINE_PROP_MIG_CAP("x-auto-converge", MIGRATION_CAPABILITY_AUTO_CONVERGE), |
| 4119 | DEFINE_PROP_MIG_CAP("x-zero-blocks", MIGRATION_CAPABILITY_ZERO_BLOCKS), |
| 4120 | DEFINE_PROP_MIG_CAP("x-compress", MIGRATION_CAPABILITY_COMPRESS), |
| 4121 | DEFINE_PROP_MIG_CAP("x-events", MIGRATION_CAPABILITY_EVENTS), |
| 4122 | DEFINE_PROP_MIG_CAP("x-postcopy-ram", MIGRATION_CAPABILITY_POSTCOPY_RAM), |
| 4123 | DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO), |
| 4124 | DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM), |
| 4125 | DEFINE_PROP_MIG_CAP("x-block", MIGRATION_CAPABILITY_BLOCK), |
| 4126 | DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH), |
Juan Quintela | cbfd6c9 | 2019-02-06 13:54:06 +0100 | [diff] [blame] | 4127 | DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_MULTIFD), |
Andrey Gruzdev | 6e8c25b | 2021-01-29 13:14:03 +0300 | [diff] [blame] | 4128 | DEFINE_PROP_MIG_CAP("x-background-snapshot", |
| 4129 | MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT), |
Peter Xu | 2081475 | 2017-07-18 11:39:03 +0800 | [diff] [blame] | 4130 | |
Peter Xu | 5272298 | 2017-06-27 12:10:14 +0800 | [diff] [blame] | 4131 | DEFINE_PROP_END_OF_LIST(), |
| 4132 | }; |
| 4133 | |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 4134 | static void migration_class_init(ObjectClass *klass, void *data) |
| 4135 | { |
| 4136 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 4137 | |
| 4138 | dc->user_creatable = false; |
Marc-André Lureau | 4f67d30 | 2020-01-10 19:30:32 +0400 | [diff] [blame] | 4139 | device_class_set_props(dc, migration_properties); |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 4140 | } |
| 4141 | |
Marc-André Lureau | b91bf5e | 2017-08-01 17:04:18 +0100 | [diff] [blame] | 4142 | static void migration_instance_finalize(Object *obj) |
| 4143 | { |
| 4144 | MigrationState *ms = MIGRATION_OBJ(obj); |
| 4145 | MigrationParameters *params = &ms->parameters; |
| 4146 | |
Juan Quintela | 87db1a7 | 2017-09-05 12:50:22 +0200 | [diff] [blame] | 4147 | qemu_mutex_destroy(&ms->error_mutex); |
Peter Xu | 62df066 | 2018-05-02 18:47:38 +0800 | [diff] [blame] | 4148 | qemu_mutex_destroy(&ms->qemu_file_lock); |
Marc-André Lureau | b91bf5e | 2017-08-01 17:04:18 +0100 | [diff] [blame] | 4149 | g_free(params->tls_hostname); |
| 4150 | g_free(params->tls_creds); |
Jens Freimann | c7e0acd | 2019-10-29 12:49:02 +0100 | [diff] [blame] | 4151 | qemu_sem_destroy(&ms->wait_unplug_sem); |
Dr. David Alan Gilbert | ad767be | 2018-06-13 11:26:41 +0100 | [diff] [blame] | 4152 | qemu_sem_destroy(&ms->rate_limit_sem); |
Dr. David Alan Gilbert | e91d895 | 2017-10-20 10:05:52 +0100 | [diff] [blame] | 4153 | qemu_sem_destroy(&ms->pause_sem); |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 4154 | qemu_sem_destroy(&ms->postcopy_pause_sem); |
Peter Xu | 14b1742 | 2018-05-02 18:47:21 +0800 | [diff] [blame] | 4155 | qemu_sem_destroy(&ms->postcopy_pause_rp_sem); |
Peter Xu | edd090c | 2018-05-02 18:47:32 +0800 | [diff] [blame] | 4156 | qemu_sem_destroy(&ms->rp_state.rp_sem); |
Marc-André Lureau | ab105cc | 2018-03-06 18:09:59 +0100 | [diff] [blame] | 4157 | error_free(ms->error); |
Marc-André Lureau | b91bf5e | 2017-08-01 17:04:18 +0100 | [diff] [blame] | 4158 | } |
| 4159 | |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 4160 | static void migration_instance_init(Object *obj) |
| 4161 | { |
| 4162 | MigrationState *ms = MIGRATION_OBJ(obj); |
Peter Xu | 8b0b29d | 2017-07-18 11:39:06 +0800 | [diff] [blame] | 4163 | MigrationParameters *params = &ms->parameters; |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 4164 | |
| 4165 | ms->state = MIGRATION_STATUS_NONE; |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 4166 | ms->mbps = -1; |
Xiao Guangrong | aecbfe9 | 2019-01-11 14:37:30 +0800 | [diff] [blame] | 4167 | ms->pages_per_second = -1; |
Dr. David Alan Gilbert | e91d895 | 2017-10-20 10:05:52 +0100 | [diff] [blame] | 4168 | qemu_sem_init(&ms->pause_sem, 0); |
Juan Quintela | 87db1a7 | 2017-09-05 12:50:22 +0200 | [diff] [blame] | 4169 | qemu_mutex_init(&ms->error_mutex); |
Peter Xu | 8b0b29d | 2017-07-18 11:39:06 +0800 | [diff] [blame] | 4170 | |
| 4171 | params->tls_hostname = g_strdup(""); |
| 4172 | params->tls_creds = g_strdup(""); |
| 4173 | |
| 4174 | /* Set has_* up only for parameter checks */ |
| 4175 | params->has_compress_level = true; |
| 4176 | params->has_compress_threads = true; |
| 4177 | params->has_decompress_threads = true; |
Keqian Zhu | dc14a47 | 2020-02-24 10:31:42 +0800 | [diff] [blame] | 4178 | params->has_throttle_trigger_threshold = true; |
Peter Xu | 8b0b29d | 2017-07-18 11:39:06 +0800 | [diff] [blame] | 4179 | params->has_cpu_throttle_initial = true; |
| 4180 | params->has_cpu_throttle_increment = true; |
Keqian Zhu | cbbf818 | 2020-04-13 18:15:08 +0800 | [diff] [blame] | 4181 | params->has_cpu_throttle_tailslow = true; |
Peter Xu | 8b0b29d | 2017-07-18 11:39:06 +0800 | [diff] [blame] | 4182 | params->has_max_bandwidth = true; |
| 4183 | params->has_downtime_limit = true; |
| 4184 | params->has_x_checkpoint_delay = true; |
| 4185 | params->has_block_incremental = true; |
Juan Quintela | cbfd6c9 | 2019-02-06 13:54:06 +0100 | [diff] [blame] | 4186 | params->has_multifd_channels = true; |
Juan Quintela | 96eef04 | 2019-01-16 10:35:55 +0100 | [diff] [blame] | 4187 | params->has_multifd_compression = true; |
Juan Quintela | 9004db4 | 2020-01-23 17:08:52 +0100 | [diff] [blame] | 4188 | params->has_multifd_zlib_level = true; |
Juan Quintela | 6a9ad15 | 2020-01-23 17:41:36 +0100 | [diff] [blame] | 4189 | params->has_multifd_zstd_level = true; |
Juan Quintela | 73af8dd | 2017-10-05 21:30:10 +0200 | [diff] [blame] | 4190 | params->has_xbzrle_cache_size = true; |
Dr. David Alan Gilbert | 7e555c6 | 2018-06-13 11:26:40 +0100 | [diff] [blame] | 4191 | params->has_max_postcopy_bandwidth = true; |
Li Qiang | 4cbc9c7 | 2018-08-01 06:00:20 -0700 | [diff] [blame] | 4192 | params->has_max_cpu_throttle = true; |
Dr. David Alan Gilbert | ee3d96b | 2019-02-27 13:24:06 +0000 | [diff] [blame] | 4193 | params->has_announce_initial = true; |
| 4194 | params->has_announce_max = true; |
| 4195 | params->has_announce_rounds = true; |
| 4196 | params->has_announce_step = true; |
Peter Xu | b23c2ad | 2018-05-02 18:47:19 +0800 | [diff] [blame] | 4197 | |
| 4198 | qemu_sem_init(&ms->postcopy_pause_sem, 0); |
Peter Xu | 14b1742 | 2018-05-02 18:47:21 +0800 | [diff] [blame] | 4199 | qemu_sem_init(&ms->postcopy_pause_rp_sem, 0); |
Peter Xu | edd090c | 2018-05-02 18:47:32 +0800 | [diff] [blame] | 4200 | qemu_sem_init(&ms->rp_state.rp_sem, 0); |
Dr. David Alan Gilbert | ad767be | 2018-06-13 11:26:41 +0100 | [diff] [blame] | 4201 | qemu_sem_init(&ms->rate_limit_sem, 0); |
Jens Freimann | c7e0acd | 2019-10-29 12:49:02 +0100 | [diff] [blame] | 4202 | qemu_sem_init(&ms->wait_unplug_sem, 0); |
Peter Xu | 62df066 | 2018-05-02 18:47:38 +0800 | [diff] [blame] | 4203 | qemu_mutex_init(&ms->qemu_file_lock); |
Peter Xu | 8b0b29d | 2017-07-18 11:39:06 +0800 | [diff] [blame] | 4204 | } |
| 4205 | |
| 4206 | /* |
| 4207 | * Return true if check pass, false otherwise. Error will be put |
| 4208 | * inside errp if provided. |
| 4209 | */ |
| 4210 | static bool migration_object_check(MigrationState *ms, Error **errp) |
| 4211 | { |
Peter Xu | 6b19a7d | 2017-07-18 11:39:10 +0800 | [diff] [blame] | 4212 | MigrationCapabilityStatusList *head = NULL; |
| 4213 | /* Assuming all off */ |
| 4214 | bool cap_list[MIGRATION_CAPABILITY__MAX] = { 0 }, ret; |
| 4215 | int i; |
| 4216 | |
Peter Xu | 8b0b29d | 2017-07-18 11:39:06 +0800 | [diff] [blame] | 4217 | if (!migrate_params_check(&ms->parameters, errp)) { |
| 4218 | return false; |
| 4219 | } |
| 4220 | |
Peter Xu | 6b19a7d | 2017-07-18 11:39:10 +0800 | [diff] [blame] | 4221 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
| 4222 | if (ms->enabled_capabilities[i]) { |
Eric Blake | eaedde5 | 2020-11-12 19:13:36 -0600 | [diff] [blame] | 4223 | QAPI_LIST_PREPEND(head, migrate_cap_add(i, true)); |
Peter Xu | 6b19a7d | 2017-07-18 11:39:10 +0800 | [diff] [blame] | 4224 | } |
| 4225 | } |
| 4226 | |
| 4227 | ret = migrate_caps_check(cap_list, head, errp); |
| 4228 | |
| 4229 | /* It works with head == NULL */ |
| 4230 | qapi_free_MigrationCapabilityStatusList(head); |
| 4231 | |
| 4232 | return ret; |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 4233 | } |
| 4234 | |
| 4235 | static const TypeInfo migration_type = { |
| 4236 | .name = TYPE_MIGRATION, |
Peter Xu | 01f6e14 | 2017-06-28 15:15:44 +0800 | [diff] [blame] | 4237 | /* |
Peter Xu | c8d3ff3 | 2017-07-05 16:21:23 +0800 | [diff] [blame] | 4238 | * NOTE: TYPE_MIGRATION is not really a device, as the object is |
Markus Armbruster | 2194abd | 2020-06-10 07:32:19 +0200 | [diff] [blame] | 4239 | * not created using qdev_new(), it is not attached to the qdev |
Peter Xu | c8d3ff3 | 2017-07-05 16:21:23 +0800 | [diff] [blame] | 4240 | * device tree, and it is never realized. |
| 4241 | * |
| 4242 | * TODO: Make this TYPE_OBJECT once QOM provides something like |
| 4243 | * TYPE_DEVICE's "-global" properties. |
Peter Xu | 01f6e14 | 2017-06-28 15:15:44 +0800 | [diff] [blame] | 4244 | */ |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 4245 | .parent = TYPE_DEVICE, |
| 4246 | .class_init = migration_class_init, |
| 4247 | .class_size = sizeof(MigrationClass), |
| 4248 | .instance_size = sizeof(MigrationState), |
| 4249 | .instance_init = migration_instance_init, |
Marc-André Lureau | b91bf5e | 2017-08-01 17:04:18 +0100 | [diff] [blame] | 4250 | .instance_finalize = migration_instance_finalize, |
Peter Xu | e5cb7e7 | 2017-06-27 12:10:13 +0800 | [diff] [blame] | 4251 | }; |
| 4252 | |
| 4253 | static void register_migration_types(void) |
| 4254 | { |
| 4255 | type_register_static(&migration_type); |
| 4256 | } |
| 4257 | |
| 4258 | type_init(register_migration_types); |