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Commit | Line | Data |
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c163b5ca | 1 | /* |
2 | * QEMU live block migration | |
3 | * | |
4 | * Copyright IBM, Corp. 2009 | |
5 | * | |
6 | * Authors: | |
7 | * Liran Schour <lirans@il.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 | * | |
12 | */ | |
13 | ||
14 | #include "qemu-common.h" | |
15 | #include "block_int.h" | |
16 | #include "hw/hw.h" | |
5e5328be | 17 | #include "qemu-queue.h" |
7184049e | 18 | #include "monitor.h" |
c163b5ca | 19 | #include "block-migration.h" |
20 | #include <assert.h> | |
c163b5ca | 21 | |
6ea44308 | 22 | #define BLOCK_SIZE (BDRV_SECTORS_PER_DIRTY_CHUNK << BDRV_SECTOR_BITS) |
c163b5ca | 23 | |
24 | #define BLK_MIG_FLAG_DEVICE_BLOCK 0x01 | |
25 | #define BLK_MIG_FLAG_EOS 0x02 | |
26 | ||
27 | #define MAX_IS_ALLOCATED_SEARCH 65536 | |
28 | #define MAX_BLOCKS_READ 10000 | |
29 | #define BLOCKS_READ_CHANGE 100 | |
30 | #define INITIAL_BLOCKS_READ 100 | |
31 | ||
32 | //#define DEBUG_BLK_MIGRATION | |
33 | ||
34 | #ifdef DEBUG_BLK_MIGRATION | |
a55eb92c | 35 | #define dprintf(fmt, ...) \ |
c163b5ca | 36 | do { printf("blk_migration: " fmt, ## __VA_ARGS__); } while (0) |
37 | #else | |
a55eb92c | 38 | #define dprintf(fmt, ...) \ |
c163b5ca | 39 | do { } while (0) |
40 | #endif | |
41 | ||
a55eb92c JK |
42 | typedef struct BlkMigDevState { |
43 | BlockDriverState *bs; | |
44 | int bulk_completed; | |
45 | int shared_base; | |
a55eb92c | 46 | int64_t cur_sector; |
82801d8f | 47 | int64_t completed_sectors; |
a55eb92c JK |
48 | int64_t total_sectors; |
49 | int64_t dirty; | |
5e5328be | 50 | QSIMPLEQ_ENTRY(BlkMigDevState) entry; |
a55eb92c JK |
51 | } BlkMigDevState; |
52 | ||
c163b5ca | 53 | typedef struct BlkMigBlock { |
54 | uint8_t *buf; | |
55 | BlkMigDevState *bmds; | |
56 | int64_t sector; | |
57 | struct iovec iov; | |
58 | QEMUIOVector qiov; | |
59 | BlockDriverAIOCB *aiocb; | |
60 | int ret; | |
5e5328be | 61 | QSIMPLEQ_ENTRY(BlkMigBlock) entry; |
c163b5ca | 62 | } BlkMigBlock; |
63 | ||
64 | typedef struct BlkMigState { | |
c163b5ca | 65 | int blk_enable; |
66 | int shared_base; | |
5e5328be JK |
67 | QSIMPLEQ_HEAD(bmds_list, BlkMigDevState) bmds_list; |
68 | QSIMPLEQ_HEAD(blk_list, BlkMigBlock) blk_list; | |
c163b5ca | 69 | int submitted; |
70 | int read_done; | |
71 | int transferred; | |
82801d8f | 72 | int64_t total_sector_sum; |
c163b5ca | 73 | int64_t print_completion; |
74 | } BlkMigState; | |
75 | ||
d11ecd3d | 76 | static BlkMigState block_mig_state; |
c163b5ca | 77 | |
13f0b67f JK |
78 | static void blk_send(QEMUFile *f, BlkMigBlock * blk) |
79 | { | |
80 | int len; | |
81 | ||
82 | /* sector number and flags */ | |
83 | qemu_put_be64(f, (blk->sector << BDRV_SECTOR_BITS) | |
84 | | BLK_MIG_FLAG_DEVICE_BLOCK); | |
85 | ||
86 | /* device name */ | |
87 | len = strlen(blk->bmds->bs->device_name); | |
88 | qemu_put_byte(f, len); | |
89 | qemu_put_buffer(f, (uint8_t *)blk->bmds->bs->device_name, len); | |
90 | ||
91 | qemu_put_buffer(f, blk->buf, BLOCK_SIZE); | |
92 | } | |
93 | ||
c163b5ca | 94 | static void blk_mig_read_cb(void *opaque, int ret) |
95 | { | |
96 | BlkMigBlock *blk = opaque; | |
a55eb92c | 97 | |
c163b5ca | 98 | blk->ret = ret; |
a55eb92c | 99 | |
5e5328be | 100 | QSIMPLEQ_INSERT_TAIL(&block_mig_state.blk_list, blk, entry); |
a55eb92c | 101 | |
d11ecd3d JK |
102 | block_mig_state.submitted--; |
103 | block_mig_state.read_done++; | |
104 | assert(block_mig_state.submitted >= 0); | |
c163b5ca | 105 | } |
106 | ||
7184049e JK |
107 | static int mig_save_device_bulk(Monitor *mon, QEMUFile *f, |
108 | BlkMigDevState *bmds, int is_async) | |
a55eb92c | 109 | { |
57cce12d JK |
110 | int64_t total_sectors = bmds->total_sectors; |
111 | int64_t cur_sector = bmds->cur_sector; | |
112 | BlockDriverState *bs = bmds->bs; | |
c163b5ca | 113 | BlkMigBlock *blk; |
13f0b67f | 114 | int nr_sectors; |
a55eb92c | 115 | |
57cce12d | 116 | if (bmds->shared_base) { |
b1d10856 | 117 | while (cur_sector < total_sectors && |
57cce12d JK |
118 | !bdrv_is_allocated(bs, cur_sector, MAX_IS_ALLOCATED_SEARCH, |
119 | &nr_sectors)) { | |
c163b5ca | 120 | cur_sector += nr_sectors; |
121 | } | |
122 | } | |
a55eb92c JK |
123 | |
124 | if (cur_sector >= total_sectors) { | |
82801d8f | 125 | bmds->cur_sector = bmds->completed_sectors = total_sectors; |
c163b5ca | 126 | return 1; |
127 | } | |
a55eb92c | 128 | |
82801d8f | 129 | bmds->completed_sectors = cur_sector; |
a55eb92c | 130 | |
57cce12d JK |
131 | cur_sector &= ~((int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK - 1); |
132 | ||
6ea44308 JK |
133 | /* we are going to transfer a full block even if it is not allocated */ |
134 | nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK; | |
c163b5ca | 135 | |
6ea44308 | 136 | if (total_sectors - cur_sector < BDRV_SECTORS_PER_DIRTY_CHUNK) { |
57cce12d | 137 | nr_sectors = total_sectors - cur_sector; |
c163b5ca | 138 | } |
a55eb92c | 139 | |
13f0b67f JK |
140 | blk = qemu_malloc(sizeof(BlkMigBlock)); |
141 | blk->buf = qemu_malloc(BLOCK_SIZE); | |
142 | blk->bmds = bmds; | |
143 | blk->sector = cur_sector; | |
a55eb92c | 144 | |
13f0b67f | 145 | if (is_async) { |
57cce12d JK |
146 | blk->iov.iov_base = blk->buf; |
147 | blk->iov.iov_len = nr_sectors * BDRV_SECTOR_SIZE; | |
148 | qemu_iovec_init_external(&blk->qiov, &blk->iov, 1); | |
a55eb92c | 149 | |
57cce12d JK |
150 | blk->aiocb = bdrv_aio_readv(bs, cur_sector, &blk->qiov, |
151 | nr_sectors, blk_mig_read_cb, blk); | |
57cce12d | 152 | if (!blk->aiocb) { |
4b640365 | 153 | goto error; |
57cce12d | 154 | } |
57cce12d | 155 | block_mig_state.submitted++; |
57cce12d | 156 | } else { |
13f0b67f | 157 | if (bdrv_read(bs, cur_sector, blk->buf, nr_sectors) < 0) { |
4b640365 | 158 | goto error; |
c163b5ca | 159 | } |
13f0b67f | 160 | blk_send(f, blk); |
a55eb92c | 161 | |
13f0b67f JK |
162 | qemu_free(blk->buf); |
163 | qemu_free(blk); | |
c163b5ca | 164 | } |
165 | ||
13f0b67f JK |
166 | bdrv_reset_dirty(bs, cur_sector, nr_sectors); |
167 | bmds->cur_sector = cur_sector + nr_sectors; | |
a55eb92c | 168 | |
13f0b67f | 169 | return (bmds->cur_sector >= total_sectors); |
4b640365 JK |
170 | |
171 | error: | |
7184049e | 172 | monitor_printf(mon, "Error reading sector %" PRId64 "\n", cur_sector); |
4b640365 JK |
173 | qemu_file_set_error(f); |
174 | qemu_free(blk->buf); | |
175 | qemu_free(blk); | |
176 | return 0; | |
c163b5ca | 177 | } |
178 | ||
c163b5ca | 179 | static void set_dirty_tracking(int enable) |
180 | { | |
181 | BlkMigDevState *bmds; | |
5e5328be JK |
182 | |
183 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { | |
a55eb92c | 184 | bdrv_set_dirty_tracking(bmds->bs, enable); |
c163b5ca | 185 | } |
c163b5ca | 186 | } |
187 | ||
7184049e | 188 | static void init_blk_migration(Monitor *mon, QEMUFile *f) |
c163b5ca | 189 | { |
5e5328be | 190 | BlkMigDevState *bmds; |
c163b5ca | 191 | BlockDriverState *bs; |
a55eb92c | 192 | |
69d63a97 JK |
193 | block_mig_state.submitted = 0; |
194 | block_mig_state.read_done = 0; | |
195 | block_mig_state.transferred = 0; | |
82801d8f | 196 | block_mig_state.total_sector_sum = 0; |
69d63a97 JK |
197 | block_mig_state.print_completion = 0; |
198 | ||
c163b5ca | 199 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
a55eb92c | 200 | if (bs->type == BDRV_TYPE_HD) { |
c163b5ca | 201 | bmds = qemu_mallocz(sizeof(BlkMigDevState)); |
202 | bmds->bs = bs; | |
203 | bmds->bulk_completed = 0; | |
6ea44308 | 204 | bmds->total_sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS; |
82801d8f | 205 | bmds->completed_sectors = 0; |
d11ecd3d | 206 | bmds->shared_base = block_mig_state.shared_base; |
a55eb92c | 207 | |
82801d8f JK |
208 | block_mig_state.total_sector_sum += bmds->total_sectors; |
209 | ||
a55eb92c | 210 | if (bmds->shared_base) { |
7184049e JK |
211 | monitor_printf(mon, "Start migration for %s with shared base " |
212 | "image\n", | |
213 | bs->device_name); | |
c163b5ca | 214 | } else { |
7184049e JK |
215 | monitor_printf(mon, "Start full migration for %s\n", |
216 | bs->device_name); | |
c163b5ca | 217 | } |
a55eb92c | 218 | |
5e5328be | 219 | QSIMPLEQ_INSERT_TAIL(&block_mig_state.bmds_list, bmds, entry); |
c163b5ca | 220 | } |
a55eb92c | 221 | } |
c163b5ca | 222 | } |
223 | ||
7184049e | 224 | static int blk_mig_save_bulked_block(Monitor *mon, QEMUFile *f, int is_async) |
c163b5ca | 225 | { |
82801d8f | 226 | int64_t completed_sector_sum = 0; |
c163b5ca | 227 | BlkMigDevState *bmds; |
82801d8f | 228 | int ret = 0; |
c163b5ca | 229 | |
5e5328be | 230 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
a55eb92c | 231 | if (bmds->bulk_completed == 0) { |
7184049e | 232 | if (mig_save_device_bulk(mon, f, bmds, is_async) == 1) { |
57cce12d JK |
233 | /* completed bulk section for this device */ |
234 | bmds->bulk_completed = 1; | |
c163b5ca | 235 | } |
82801d8f JK |
236 | completed_sector_sum += bmds->completed_sectors; |
237 | ret = 1; | |
238 | break; | |
239 | } else { | |
240 | completed_sector_sum += bmds->completed_sectors; | |
c163b5ca | 241 | } |
242 | } | |
a55eb92c | 243 | |
82801d8f | 244 | if (completed_sector_sum >= block_mig_state.print_completion) { |
7184049e JK |
245 | monitor_printf(mon, "Completed %" PRId64 " %%\r", |
246 | completed_sector_sum * 100 / | |
247 | block_mig_state.total_sector_sum); | |
248 | monitor_flush(mon); | |
82801d8f JK |
249 | block_mig_state.print_completion += |
250 | (BDRV_SECTORS_PER_DIRTY_CHUNK * 10000); | |
251 | } | |
252 | ||
253 | return ret; | |
c163b5ca | 254 | } |
255 | ||
256 | #define MAX_NUM_BLOCKS 4 | |
257 | ||
7184049e | 258 | static void blk_mig_save_dirty_blocks(Monitor *mon, QEMUFile *f) |
c163b5ca | 259 | { |
260 | BlkMigDevState *bmds; | |
13f0b67f | 261 | BlkMigBlock blk; |
c163b5ca | 262 | int64_t sector; |
a55eb92c | 263 | |
13f0b67f | 264 | blk.buf = qemu_malloc(BLOCK_SIZE); |
575a58d7 | 265 | |
5e5328be | 266 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
a55eb92c JK |
267 | for (sector = 0; sector < bmds->cur_sector;) { |
268 | if (bdrv_get_dirty(bmds->bs, sector)) { | |
13f0b67f | 269 | if (bdrv_read(bmds->bs, sector, blk.buf, |
6ea44308 | 270 | BDRV_SECTORS_PER_DIRTY_CHUNK) < 0) { |
7184049e JK |
271 | monitor_printf(mon, "Error reading sector %" PRId64 "\n", |
272 | sector); | |
4b640365 JK |
273 | qemu_file_set_error(f); |
274 | qemu_free(blk.buf); | |
275 | return; | |
c163b5ca | 276 | } |
13f0b67f JK |
277 | blk.bmds = bmds; |
278 | blk.sector = sector; | |
279 | blk_send(f, &blk); | |
a55eb92c JK |
280 | |
281 | bdrv_reset_dirty(bmds->bs, sector, | |
6ea44308 | 282 | BDRV_SECTORS_PER_DIRTY_CHUNK); |
a55eb92c | 283 | } |
6ea44308 | 284 | sector += BDRV_SECTORS_PER_DIRTY_CHUNK; |
c163b5ca | 285 | } |
286 | } | |
575a58d7 | 287 | |
13f0b67f | 288 | qemu_free(blk.buf); |
c163b5ca | 289 | } |
290 | ||
291 | static void flush_blks(QEMUFile* f) | |
292 | { | |
5e5328be | 293 | BlkMigBlock *blk; |
a55eb92c | 294 | |
d11ecd3d JK |
295 | dprintf("%s Enter submitted %d read_done %d transferred %d\n", |
296 | __FUNCTION__, block_mig_state.submitted, block_mig_state.read_done, | |
297 | block_mig_state.transferred); | |
a55eb92c | 298 | |
5e5328be JK |
299 | while ((blk = QSIMPLEQ_FIRST(&block_mig_state.blk_list)) != NULL) { |
300 | if (qemu_file_rate_limit(f)) { | |
301 | break; | |
302 | } | |
4b640365 JK |
303 | if (blk->ret < 0) { |
304 | qemu_file_set_error(f); | |
305 | break; | |
306 | } | |
13f0b67f | 307 | blk_send(f, blk); |
a55eb92c | 308 | |
5e5328be | 309 | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.blk_list, entry); |
c163b5ca | 310 | qemu_free(blk->buf); |
311 | qemu_free(blk); | |
a55eb92c | 312 | |
d11ecd3d JK |
313 | block_mig_state.read_done--; |
314 | block_mig_state.transferred++; | |
315 | assert(block_mig_state.read_done >= 0); | |
c163b5ca | 316 | } |
c163b5ca | 317 | |
d11ecd3d JK |
318 | dprintf("%s Exit submitted %d read_done %d transferred %d\n", __FUNCTION__, |
319 | block_mig_state.submitted, block_mig_state.read_done, | |
320 | block_mig_state.transferred); | |
c163b5ca | 321 | } |
322 | ||
323 | static int is_stage2_completed(void) | |
324 | { | |
325 | BlkMigDevState *bmds; | |
a55eb92c | 326 | |
d11ecd3d | 327 | if (block_mig_state.submitted > 0) { |
c163b5ca | 328 | return 0; |
329 | } | |
a55eb92c | 330 | |
5e5328be | 331 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
a55eb92c | 332 | if (bmds->bulk_completed == 0) { |
c163b5ca | 333 | return 0; |
334 | } | |
335 | } | |
a55eb92c | 336 | |
c163b5ca | 337 | return 1; |
338 | } | |
339 | ||
7184049e | 340 | static void blk_mig_cleanup(Monitor *mon) |
4ec7fcc7 | 341 | { |
82801d8f JK |
342 | BlkMigDevState *bmds; |
343 | BlkMigBlock *blk; | |
4ec7fcc7 | 344 | |
82801d8f JK |
345 | while ((bmds = QSIMPLEQ_FIRST(&block_mig_state.bmds_list)) != NULL) { |
346 | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.bmds_list, entry); | |
4ec7fcc7 JK |
347 | qemu_free(bmds); |
348 | } | |
349 | ||
82801d8f JK |
350 | while ((blk = QSIMPLEQ_FIRST(&block_mig_state.blk_list)) != NULL) { |
351 | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.blk_list, entry); | |
4ec7fcc7 JK |
352 | qemu_free(blk->buf); |
353 | qemu_free(blk); | |
354 | } | |
355 | ||
356 | set_dirty_tracking(0); | |
357 | ||
7184049e | 358 | monitor_printf(mon, "\n"); |
4ec7fcc7 JK |
359 | } |
360 | ||
f327aa0c | 361 | static int block_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque) |
c163b5ca | 362 | { |
d11ecd3d JK |
363 | dprintf("Enter save live stage %d submitted %d transferred %d\n", |
364 | stage, block_mig_state.submitted, block_mig_state.transferred); | |
a55eb92c | 365 | |
4ec7fcc7 | 366 | if (stage < 0) { |
7184049e | 367 | blk_mig_cleanup(mon); |
4ec7fcc7 JK |
368 | return 0; |
369 | } | |
370 | ||
d11ecd3d | 371 | if (block_mig_state.blk_enable != 1) { |
c163b5ca | 372 | /* no need to migrate storage */ |
a55eb92c | 373 | qemu_put_be64(f, BLK_MIG_FLAG_EOS); |
c163b5ca | 374 | return 1; |
375 | } | |
a55eb92c JK |
376 | |
377 | if (stage == 1) { | |
7184049e | 378 | init_blk_migration(mon, f); |
a55eb92c | 379 | |
c163b5ca | 380 | /* start track dirty blocks */ |
381 | set_dirty_tracking(1); | |
c163b5ca | 382 | } |
383 | ||
384 | flush_blks(f); | |
a55eb92c | 385 | |
4b640365 | 386 | if (qemu_file_has_error(f)) { |
7184049e | 387 | blk_mig_cleanup(mon); |
4b640365 JK |
388 | return 0; |
389 | } | |
390 | ||
c163b5ca | 391 | /* control the rate of transfer */ |
d11ecd3d JK |
392 | while ((block_mig_state.submitted + |
393 | block_mig_state.read_done) * BLOCK_SIZE < | |
a55eb92c | 394 | qemu_file_get_rate_limit(f)) { |
7184049e | 395 | if (blk_mig_save_bulked_block(mon, f, 1) == 0) { |
a55eb92c | 396 | /* no more bulk blocks for now */ |
c163b5ca | 397 | break; |
a55eb92c | 398 | } |
c163b5ca | 399 | } |
a55eb92c | 400 | |
c163b5ca | 401 | flush_blks(f); |
a55eb92c | 402 | |
4b640365 | 403 | if (qemu_file_has_error(f)) { |
7184049e | 404 | blk_mig_cleanup(mon); |
4b640365 JK |
405 | return 0; |
406 | } | |
407 | ||
a55eb92c | 408 | if (stage == 3) { |
7184049e | 409 | while (blk_mig_save_bulked_block(mon, f, 0) != 0) { |
a55eb92c JK |
410 | /* empty */ |
411 | } | |
412 | ||
7184049e JK |
413 | blk_mig_save_dirty_blocks(mon, f); |
414 | blk_mig_cleanup(mon); | |
a55eb92c | 415 | |
4b640365 JK |
416 | if (qemu_file_has_error(f)) { |
417 | return 0; | |
418 | } | |
419 | ||
7184049e | 420 | monitor_printf(mon, "Block migration completed\n"); |
c163b5ca | 421 | } |
a55eb92c JK |
422 | |
423 | qemu_put_be64(f, BLK_MIG_FLAG_EOS); | |
424 | ||
c163b5ca | 425 | return ((stage == 2) && is_stage2_completed()); |
426 | } | |
427 | ||
428 | static int block_load(QEMUFile *f, void *opaque, int version_id) | |
429 | { | |
430 | int len, flags; | |
431 | char device_name[256]; | |
432 | int64_t addr; | |
433 | BlockDriverState *bs; | |
434 | uint8_t *buf; | |
a55eb92c | 435 | |
c163b5ca | 436 | do { |
c163b5ca | 437 | addr = qemu_get_be64(f); |
a55eb92c | 438 | |
6ea44308 JK |
439 | flags = addr & ~BDRV_SECTOR_MASK; |
440 | addr >>= BDRV_SECTOR_BITS; | |
a55eb92c JK |
441 | |
442 | if (flags & BLK_MIG_FLAG_DEVICE_BLOCK) { | |
c163b5ca | 443 | /* get device name */ |
444 | len = qemu_get_byte(f); | |
c163b5ca | 445 | qemu_get_buffer(f, (uint8_t *)device_name, len); |
446 | device_name[len] = '\0'; | |
a55eb92c | 447 | |
c163b5ca | 448 | bs = bdrv_find(device_name); |
4b640365 JK |
449 | if (!bs) { |
450 | fprintf(stderr, "Error unknown block device %s\n", | |
451 | device_name); | |
452 | return -EINVAL; | |
453 | } | |
a55eb92c | 454 | |
575a58d7 JK |
455 | buf = qemu_malloc(BLOCK_SIZE); |
456 | ||
a55eb92c | 457 | qemu_get_buffer(f, buf, BLOCK_SIZE); |
4b640365 | 458 | bdrv_write(bs, addr, buf, BDRV_SECTORS_PER_DIRTY_CHUNK); |
575a58d7 JK |
459 | |
460 | qemu_free(buf); | |
a55eb92c | 461 | } else if (!(flags & BLK_MIG_FLAG_EOS)) { |
4b640365 JK |
462 | fprintf(stderr, "Unknown flags\n"); |
463 | return -EINVAL; | |
464 | } | |
465 | if (qemu_file_has_error(f)) { | |
466 | return -EIO; | |
c163b5ca | 467 | } |
a55eb92c JK |
468 | } while (!(flags & BLK_MIG_FLAG_EOS)); |
469 | ||
c163b5ca | 470 | return 0; |
471 | } | |
472 | ||
473 | static void block_set_params(int blk_enable, int shared_base, void *opaque) | |
474 | { | |
d11ecd3d JK |
475 | block_mig_state.blk_enable = blk_enable; |
476 | block_mig_state.shared_base = shared_base; | |
a55eb92c | 477 | |
c163b5ca | 478 | /* shared base means that blk_enable = 1 */ |
d11ecd3d | 479 | block_mig_state.blk_enable |= shared_base; |
c163b5ca | 480 | } |
481 | ||
c163b5ca | 482 | void blk_mig_init(void) |
a55eb92c | 483 | { |
5e5328be JK |
484 | QSIMPLEQ_INIT(&block_mig_state.bmds_list); |
485 | QSIMPLEQ_INIT(&block_mig_state.blk_list); | |
486 | ||
a55eb92c | 487 | register_savevm_live("block", 0, 1, block_set_params, block_save_live, |
d11ecd3d | 488 | NULL, block_load, &block_mig_state); |
c163b5ca | 489 | } |