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Commit | Line | Data |
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c163b5ca LS |
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" |
c163b5ca LS |
18 | #include "block-migration.h" |
19 | #include <assert.h> | |
c163b5ca | 20 | |
6ea44308 | 21 | #define BLOCK_SIZE (BDRV_SECTORS_PER_DIRTY_CHUNK << BDRV_SECTOR_BITS) |
c163b5ca LS |
22 | |
23 | #define BLK_MIG_FLAG_DEVICE_BLOCK 0x01 | |
24 | #define BLK_MIG_FLAG_EOS 0x02 | |
25 | ||
26 | #define MAX_IS_ALLOCATED_SEARCH 65536 | |
27 | #define MAX_BLOCKS_READ 10000 | |
28 | #define BLOCKS_READ_CHANGE 100 | |
29 | #define INITIAL_BLOCKS_READ 100 | |
30 | ||
31 | //#define DEBUG_BLK_MIGRATION | |
32 | ||
33 | #ifdef DEBUG_BLK_MIGRATION | |
a55eb92c | 34 | #define dprintf(fmt, ...) \ |
c163b5ca LS |
35 | do { printf("blk_migration: " fmt, ## __VA_ARGS__); } while (0) |
36 | #else | |
a55eb92c | 37 | #define dprintf(fmt, ...) \ |
c163b5ca LS |
38 | do { } while (0) |
39 | #endif | |
40 | ||
a55eb92c JK |
41 | typedef struct BlkMigDevState { |
42 | BlockDriverState *bs; | |
43 | int bulk_completed; | |
44 | int shared_base; | |
a55eb92c JK |
45 | int64_t cur_sector; |
46 | int64_t total_sectors; | |
47 | int64_t dirty; | |
5e5328be | 48 | QSIMPLEQ_ENTRY(BlkMigDevState) entry; |
a55eb92c JK |
49 | } BlkMigDevState; |
50 | ||
c163b5ca LS |
51 | typedef struct BlkMigBlock { |
52 | uint8_t *buf; | |
53 | BlkMigDevState *bmds; | |
54 | int64_t sector; | |
55 | struct iovec iov; | |
56 | QEMUIOVector qiov; | |
57 | BlockDriverAIOCB *aiocb; | |
58 | int ret; | |
5e5328be | 59 | QSIMPLEQ_ENTRY(BlkMigBlock) entry; |
c163b5ca LS |
60 | } BlkMigBlock; |
61 | ||
62 | typedef struct BlkMigState { | |
c163b5ca LS |
63 | int blk_enable; |
64 | int shared_base; | |
5e5328be JK |
65 | QSIMPLEQ_HEAD(bmds_list, BlkMigDevState) bmds_list; |
66 | QSIMPLEQ_HEAD(blk_list, BlkMigBlock) blk_list; | |
c163b5ca LS |
67 | int submitted; |
68 | int read_done; | |
69 | int transferred; | |
70 | int64_t print_completion; | |
71 | } BlkMigState; | |
72 | ||
d11ecd3d | 73 | static BlkMigState block_mig_state; |
c163b5ca LS |
74 | |
75 | static void blk_mig_read_cb(void *opaque, int ret) | |
76 | { | |
77 | BlkMigBlock *blk = opaque; | |
a55eb92c | 78 | |
c163b5ca | 79 | blk->ret = ret; |
a55eb92c | 80 | |
5e5328be | 81 | QSIMPLEQ_INSERT_TAIL(&block_mig_state.blk_list, blk, entry); |
a55eb92c | 82 | |
d11ecd3d JK |
83 | block_mig_state.submitted--; |
84 | block_mig_state.read_done++; | |
85 | assert(block_mig_state.submitted >= 0); | |
c163b5ca LS |
86 | } |
87 | ||
88 | static int mig_read_device_bulk(QEMUFile *f, BlkMigDevState *bms) | |
a55eb92c | 89 | { |
c163b5ca LS |
90 | int nr_sectors; |
91 | int64_t total_sectors, cur_sector = 0; | |
92 | BlockDriverState *bs = bms->bs; | |
93 | BlkMigBlock *blk; | |
a55eb92c | 94 | |
c163b5ca LS |
95 | blk = qemu_malloc(sizeof(BlkMigBlock)); |
96 | blk->buf = qemu_malloc(BLOCK_SIZE); | |
a55eb92c | 97 | |
c163b5ca | 98 | cur_sector = bms->cur_sector; |
6ea44308 | 99 | total_sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS; |
a55eb92c JK |
100 | |
101 | if (bms->shared_base) { | |
102 | while (cur_sector < bms->total_sectors && | |
103 | !bdrv_is_allocated(bms->bs, cur_sector, | |
104 | MAX_IS_ALLOCATED_SEARCH, &nr_sectors)) { | |
c163b5ca LS |
105 | cur_sector += nr_sectors; |
106 | } | |
107 | } | |
a55eb92c JK |
108 | |
109 | if (cur_sector >= total_sectors) { | |
c163b5ca LS |
110 | bms->cur_sector = total_sectors; |
111 | qemu_free(blk->buf); | |
112 | qemu_free(blk); | |
113 | return 1; | |
114 | } | |
a55eb92c | 115 | |
d11ecd3d | 116 | if (cur_sector >= block_mig_state.print_completion) { |
c163b5ca LS |
117 | printf("Completed %" PRId64 " %%\r", cur_sector * 100 / total_sectors); |
118 | fflush(stdout); | |
d11ecd3d | 119 | block_mig_state.print_completion += |
6ea44308 | 120 | (BDRV_SECTORS_PER_DIRTY_CHUNK * 10000); |
c163b5ca | 121 | } |
a55eb92c | 122 | |
6ea44308 JK |
123 | /* we are going to transfer a full block even if it is not allocated */ |
124 | nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK; | |
c163b5ca | 125 | |
6ea44308 | 126 | cur_sector &= ~((int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK - 1); |
a55eb92c | 127 | |
6ea44308 | 128 | if (total_sectors - cur_sector < BDRV_SECTORS_PER_DIRTY_CHUNK) { |
c163b5ca LS |
129 | nr_sectors = (total_sectors - cur_sector); |
130 | } | |
a55eb92c | 131 | |
c163b5ca LS |
132 | bms->cur_sector = cur_sector + nr_sectors; |
133 | blk->sector = cur_sector; | |
134 | blk->bmds = bms; | |
a55eb92c | 135 | |
c163b5ca | 136 | blk->iov.iov_base = blk->buf; |
6ea44308 | 137 | blk->iov.iov_len = nr_sectors * BDRV_SECTOR_SIZE; |
c163b5ca | 138 | qemu_iovec_init_external(&blk->qiov, &blk->iov, 1); |
a55eb92c | 139 | |
c163b5ca LS |
140 | blk->aiocb = bdrv_aio_readv(bs, cur_sector, &blk->qiov, |
141 | nr_sectors, blk_mig_read_cb, blk); | |
a55eb92c JK |
142 | |
143 | if (!blk->aiocb) { | |
c163b5ca LS |
144 | printf("Error reading sector %" PRId64 "\n", cur_sector); |
145 | qemu_free(blk->buf); | |
146 | qemu_free(blk); | |
147 | return 0; | |
148 | } | |
149 | ||
150 | bdrv_reset_dirty(bms->bs, cur_sector, nr_sectors); | |
d11ecd3d | 151 | block_mig_state.submitted++; |
a55eb92c | 152 | |
c163b5ca LS |
153 | return (bms->cur_sector >= total_sectors); |
154 | } | |
155 | ||
156 | static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds) | |
a55eb92c | 157 | { |
c163b5ca LS |
158 | int len, nr_sectors; |
159 | int64_t total_sectors = bmds->total_sectors, cur_sector = 0; | |
160 | uint8_t *tmp_buf = NULL; | |
161 | BlockDriverState *bs = bmds->bs; | |
162 | ||
163 | tmp_buf = qemu_malloc(BLOCK_SIZE); | |
a55eb92c | 164 | |
c163b5ca | 165 | cur_sector = bmds->cur_sector; |
a55eb92c JK |
166 | |
167 | if (bmds->shared_base) { | |
168 | while (cur_sector < bmds->total_sectors && | |
169 | !bdrv_is_allocated(bmds->bs, cur_sector, | |
170 | MAX_IS_ALLOCATED_SEARCH, &nr_sectors)) { | |
c163b5ca LS |
171 | cur_sector += nr_sectors; |
172 | } | |
173 | } | |
a55eb92c JK |
174 | |
175 | if (cur_sector >= total_sectors) { | |
c163b5ca LS |
176 | bmds->cur_sector = total_sectors; |
177 | qemu_free(tmp_buf); | |
178 | return 1; | |
179 | } | |
a55eb92c | 180 | |
d11ecd3d | 181 | if (cur_sector >= block_mig_state.print_completion) { |
c163b5ca LS |
182 | printf("Completed %" PRId64 " %%\r", cur_sector * 100 / total_sectors); |
183 | fflush(stdout); | |
d11ecd3d | 184 | block_mig_state.print_completion += |
6ea44308 | 185 | (BDRV_SECTORS_PER_DIRTY_CHUNK * 10000); |
c163b5ca | 186 | } |
a55eb92c | 187 | |
6ea44308 | 188 | cur_sector &= ~((int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK - 1); |
a55eb92c | 189 | |
6ea44308 JK |
190 | /* we are going to transfer a full block even if it is not allocated */ |
191 | nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK; | |
a55eb92c | 192 | |
6ea44308 | 193 | if (total_sectors - cur_sector < BDRV_SECTORS_PER_DIRTY_CHUNK) { |
c163b5ca LS |
194 | nr_sectors = (total_sectors - cur_sector); |
195 | } | |
a55eb92c JK |
196 | |
197 | if (bdrv_read(bs, cur_sector, tmp_buf, nr_sectors) < 0) { | |
c163b5ca LS |
198 | printf("Error reading sector %" PRId64 "\n", cur_sector); |
199 | } | |
200 | ||
201 | bdrv_reset_dirty(bs, cur_sector, nr_sectors); | |
a55eb92c JK |
202 | |
203 | /* sector number and flags */ | |
6ea44308 JK |
204 | qemu_put_be64(f, (cur_sector << BDRV_SECTOR_BITS) |
205 | | BLK_MIG_FLAG_DEVICE_BLOCK); | |
a55eb92c JK |
206 | |
207 | /* device name */ | |
c163b5ca LS |
208 | len = strlen(bs->device_name); |
209 | qemu_put_byte(f, len); | |
210 | qemu_put_buffer(f, (uint8_t *)bs->device_name, len); | |
a55eb92c JK |
211 | |
212 | qemu_put_buffer(f, tmp_buf, BLOCK_SIZE); | |
213 | ||
6ea44308 | 214 | bmds->cur_sector = cur_sector + BDRV_SECTORS_PER_DIRTY_CHUNK; |
a55eb92c | 215 | |
c163b5ca | 216 | qemu_free(tmp_buf); |
a55eb92c | 217 | |
c163b5ca LS |
218 | return (bmds->cur_sector >= total_sectors); |
219 | } | |
220 | ||
221 | static void send_blk(QEMUFile *f, BlkMigBlock * blk) | |
222 | { | |
223 | int len; | |
a55eb92c JK |
224 | |
225 | /* sector number and flags */ | |
6ea44308 JK |
226 | qemu_put_be64(f, (blk->sector << BDRV_SECTOR_BITS) |
227 | | BLK_MIG_FLAG_DEVICE_BLOCK); | |
a55eb92c JK |
228 | |
229 | /* device name */ | |
c163b5ca LS |
230 | len = strlen(blk->bmds->bs->device_name); |
231 | qemu_put_byte(f, len); | |
232 | qemu_put_buffer(f, (uint8_t *)blk->bmds->bs->device_name, len); | |
a55eb92c JK |
233 | |
234 | qemu_put_buffer(f, blk->buf, BLOCK_SIZE); | |
c163b5ca LS |
235 | } |
236 | ||
c163b5ca LS |
237 | static void set_dirty_tracking(int enable) |
238 | { | |
239 | BlkMigDevState *bmds; | |
5e5328be JK |
240 | |
241 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { | |
a55eb92c | 242 | bdrv_set_dirty_tracking(bmds->bs, enable); |
c163b5ca | 243 | } |
c163b5ca LS |
244 | } |
245 | ||
246 | static void init_blk_migration(QEMUFile *f) | |
247 | { | |
5e5328be | 248 | BlkMigDevState *bmds; |
c163b5ca | 249 | BlockDriverState *bs; |
a55eb92c | 250 | |
69d63a97 JK |
251 | block_mig_state.submitted = 0; |
252 | block_mig_state.read_done = 0; | |
253 | block_mig_state.transferred = 0; | |
254 | block_mig_state.print_completion = 0; | |
255 | ||
c163b5ca | 256 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
a55eb92c | 257 | if (bs->type == BDRV_TYPE_HD) { |
c163b5ca LS |
258 | bmds = qemu_mallocz(sizeof(BlkMigDevState)); |
259 | bmds->bs = bs; | |
260 | bmds->bulk_completed = 0; | |
6ea44308 | 261 | bmds->total_sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS; |
d11ecd3d | 262 | bmds->shared_base = block_mig_state.shared_base; |
a55eb92c JK |
263 | |
264 | if (bmds->shared_base) { | |
265 | printf("Start migration for %s with shared base image\n", | |
c163b5ca LS |
266 | bs->device_name); |
267 | } else { | |
268 | printf("Start full migration for %s\n", bs->device_name); | |
269 | } | |
a55eb92c | 270 | |
5e5328be | 271 | QSIMPLEQ_INSERT_TAIL(&block_mig_state.bmds_list, bmds, entry); |
c163b5ca | 272 | } |
a55eb92c | 273 | } |
c163b5ca LS |
274 | } |
275 | ||
276 | static int blk_mig_save_bulked_block(QEMUFile *f, int is_async) | |
277 | { | |
278 | BlkMigDevState *bmds; | |
279 | ||
5e5328be | 280 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
a55eb92c JK |
281 | if (bmds->bulk_completed == 0) { |
282 | if (is_async) { | |
283 | if (mig_read_device_bulk(f, bmds) == 1) { | |
c163b5ca LS |
284 | /* completed bulk section for this device */ |
285 | bmds->bulk_completed = 1; | |
286 | } | |
287 | } else { | |
a55eb92c | 288 | if (mig_save_device_bulk(f, bmds) == 1) { |
c163b5ca LS |
289 | /* completed bulk section for this device */ |
290 | bmds->bulk_completed = 1; | |
291 | } | |
292 | } | |
293 | return 1; | |
294 | } | |
295 | } | |
a55eb92c | 296 | |
c163b5ca | 297 | /* we reached here means bulk is completed */ |
c163b5ca | 298 | return 0; |
c163b5ca LS |
299 | } |
300 | ||
301 | #define MAX_NUM_BLOCKS 4 | |
302 | ||
303 | static void blk_mig_save_dirty_blocks(QEMUFile *f) | |
304 | { | |
305 | BlkMigDevState *bmds; | |
575a58d7 | 306 | uint8_t *buf; |
c163b5ca LS |
307 | int64_t sector; |
308 | int len; | |
a55eb92c | 309 | |
575a58d7 JK |
310 | buf = qemu_malloc(BLOCK_SIZE); |
311 | ||
5e5328be | 312 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
a55eb92c JK |
313 | for (sector = 0; sector < bmds->cur_sector;) { |
314 | if (bdrv_get_dirty(bmds->bs, sector)) { | |
315 | if (bdrv_read(bmds->bs, sector, buf, | |
6ea44308 | 316 | BDRV_SECTORS_PER_DIRTY_CHUNK) < 0) { |
a55eb92c | 317 | /* FIXME: add error handling */ |
c163b5ca | 318 | } |
a55eb92c JK |
319 | |
320 | /* sector number and flags */ | |
6ea44308 | 321 | qemu_put_be64(f, (sector << BDRV_SECTOR_BITS) |
a55eb92c JK |
322 | | BLK_MIG_FLAG_DEVICE_BLOCK); |
323 | ||
c163b5ca | 324 | /* device name */ |
c163b5ca | 325 | len = strlen(bmds->bs->device_name); |
c163b5ca LS |
326 | qemu_put_byte(f, len); |
327 | qemu_put_buffer(f, (uint8_t *)bmds->bs->device_name, len); | |
a55eb92c | 328 | |
6ea44308 | 329 | qemu_put_buffer(f, buf, BLOCK_SIZE); |
a55eb92c JK |
330 | |
331 | bdrv_reset_dirty(bmds->bs, sector, | |
6ea44308 | 332 | BDRV_SECTORS_PER_DIRTY_CHUNK); |
a55eb92c | 333 | } |
6ea44308 | 334 | sector += BDRV_SECTORS_PER_DIRTY_CHUNK; |
c163b5ca LS |
335 | } |
336 | } | |
575a58d7 JK |
337 | |
338 | qemu_free(buf); | |
c163b5ca LS |
339 | } |
340 | ||
341 | static void flush_blks(QEMUFile* f) | |
342 | { | |
5e5328be | 343 | BlkMigBlock *blk; |
a55eb92c | 344 | |
d11ecd3d JK |
345 | dprintf("%s Enter submitted %d read_done %d transferred %d\n", |
346 | __FUNCTION__, block_mig_state.submitted, block_mig_state.read_done, | |
347 | block_mig_state.transferred); | |
a55eb92c | 348 | |
5e5328be JK |
349 | while ((blk = QSIMPLEQ_FIRST(&block_mig_state.blk_list)) != NULL) { |
350 | if (qemu_file_rate_limit(f)) { | |
351 | break; | |
352 | } | |
c163b5ca | 353 | send_blk(f, blk); |
a55eb92c | 354 | |
5e5328be | 355 | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.blk_list, entry); |
c163b5ca LS |
356 | qemu_free(blk->buf); |
357 | qemu_free(blk); | |
a55eb92c | 358 | |
d11ecd3d JK |
359 | block_mig_state.read_done--; |
360 | block_mig_state.transferred++; | |
361 | assert(block_mig_state.read_done >= 0); | |
c163b5ca | 362 | } |
c163b5ca | 363 | |
d11ecd3d JK |
364 | dprintf("%s Exit submitted %d read_done %d transferred %d\n", __FUNCTION__, |
365 | block_mig_state.submitted, block_mig_state.read_done, | |
366 | block_mig_state.transferred); | |
c163b5ca LS |
367 | } |
368 | ||
369 | static int is_stage2_completed(void) | |
370 | { | |
371 | BlkMigDevState *bmds; | |
a55eb92c | 372 | |
d11ecd3d | 373 | if (block_mig_state.submitted > 0) { |
c163b5ca LS |
374 | return 0; |
375 | } | |
a55eb92c | 376 | |
5e5328be | 377 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
a55eb92c | 378 | if (bmds->bulk_completed == 0) { |
c163b5ca LS |
379 | return 0; |
380 | } | |
381 | } | |
a55eb92c | 382 | |
c163b5ca LS |
383 | return 1; |
384 | } | |
385 | ||
386 | static int block_save_live(QEMUFile *f, int stage, void *opaque) | |
387 | { | |
d11ecd3d JK |
388 | dprintf("Enter save live stage %d submitted %d transferred %d\n", |
389 | stage, block_mig_state.submitted, block_mig_state.transferred); | |
a55eb92c | 390 | |
d11ecd3d | 391 | if (block_mig_state.blk_enable != 1) { |
c163b5ca | 392 | /* no need to migrate storage */ |
a55eb92c | 393 | qemu_put_be64(f, BLK_MIG_FLAG_EOS); |
c163b5ca LS |
394 | return 1; |
395 | } | |
a55eb92c JK |
396 | |
397 | if (stage == 1) { | |
c163b5ca | 398 | init_blk_migration(f); |
a55eb92c | 399 | |
c163b5ca LS |
400 | /* start track dirty blocks */ |
401 | set_dirty_tracking(1); | |
c163b5ca LS |
402 | } |
403 | ||
404 | flush_blks(f); | |
a55eb92c | 405 | |
c163b5ca | 406 | /* control the rate of transfer */ |
d11ecd3d JK |
407 | while ((block_mig_state.submitted + |
408 | block_mig_state.read_done) * BLOCK_SIZE < | |
a55eb92c JK |
409 | qemu_file_get_rate_limit(f)) { |
410 | if (blk_mig_save_bulked_block(f, 1) == 0) { | |
411 | /* no more bulk blocks for now */ | |
c163b5ca | 412 | break; |
a55eb92c | 413 | } |
c163b5ca | 414 | } |
a55eb92c | 415 | |
c163b5ca | 416 | flush_blks(f); |
a55eb92c JK |
417 | |
418 | if (stage == 3) { | |
419 | while (blk_mig_save_bulked_block(f, 0) != 0) { | |
420 | /* empty */ | |
421 | } | |
422 | ||
c163b5ca | 423 | blk_mig_save_dirty_blocks(f); |
a55eb92c | 424 | |
c163b5ca | 425 | /* stop track dirty blocks */ |
a55eb92c JK |
426 | set_dirty_tracking(0); |
427 | ||
428 | printf("\nBlock migration completed\n"); | |
c163b5ca | 429 | } |
a55eb92c JK |
430 | |
431 | qemu_put_be64(f, BLK_MIG_FLAG_EOS); | |
432 | ||
c163b5ca LS |
433 | return ((stage == 2) && is_stage2_completed()); |
434 | } | |
435 | ||
436 | static int block_load(QEMUFile *f, void *opaque, int version_id) | |
437 | { | |
438 | int len, flags; | |
439 | char device_name[256]; | |
440 | int64_t addr; | |
441 | BlockDriverState *bs; | |
442 | uint8_t *buf; | |
a55eb92c | 443 | |
c163b5ca | 444 | do { |
c163b5ca | 445 | addr = qemu_get_be64(f); |
a55eb92c | 446 | |
6ea44308 JK |
447 | flags = addr & ~BDRV_SECTOR_MASK; |
448 | addr >>= BDRV_SECTOR_BITS; | |
a55eb92c JK |
449 | |
450 | if (flags & BLK_MIG_FLAG_DEVICE_BLOCK) { | |
c163b5ca LS |
451 | /* get device name */ |
452 | len = qemu_get_byte(f); | |
a55eb92c | 453 | |
c163b5ca LS |
454 | qemu_get_buffer(f, (uint8_t *)device_name, len); |
455 | device_name[len] = '\0'; | |
a55eb92c | 456 | |
c163b5ca | 457 | bs = bdrv_find(device_name); |
a55eb92c | 458 | |
575a58d7 JK |
459 | buf = qemu_malloc(BLOCK_SIZE); |
460 | ||
a55eb92c JK |
461 | qemu_get_buffer(f, buf, BLOCK_SIZE); |
462 | if (bs != NULL) { | |
6ea44308 | 463 | bdrv_write(bs, addr, buf, BDRV_SECTORS_PER_DIRTY_CHUNK); |
c163b5ca LS |
464 | } else { |
465 | printf("Error unknown block device %s\n", device_name); | |
a55eb92c | 466 | /* FIXME: add error handling */ |
c163b5ca | 467 | } |
575a58d7 JK |
468 | |
469 | qemu_free(buf); | |
a55eb92c | 470 | } else if (!(flags & BLK_MIG_FLAG_EOS)) { |
c163b5ca | 471 | printf("Unknown flags\n"); |
a55eb92c | 472 | /* FIXME: add error handling */ |
c163b5ca | 473 | } |
a55eb92c JK |
474 | } while (!(flags & BLK_MIG_FLAG_EOS)); |
475 | ||
c163b5ca LS |
476 | return 0; |
477 | } | |
478 | ||
479 | static void block_set_params(int blk_enable, int shared_base, void *opaque) | |
480 | { | |
d11ecd3d JK |
481 | block_mig_state.blk_enable = blk_enable; |
482 | block_mig_state.shared_base = shared_base; | |
a55eb92c | 483 | |
c163b5ca | 484 | /* shared base means that blk_enable = 1 */ |
d11ecd3d | 485 | block_mig_state.blk_enable |= shared_base; |
c163b5ca LS |
486 | } |
487 | ||
c163b5ca | 488 | void blk_mig_init(void) |
a55eb92c | 489 | { |
5e5328be JK |
490 | QSIMPLEQ_INIT(&block_mig_state.bmds_list); |
491 | QSIMPLEQ_INIT(&block_mig_state.blk_list); | |
492 | ||
a55eb92c | 493 | register_savevm_live("block", 0, 1, block_set_params, block_save_live, |
d11ecd3d | 494 | NULL, block_load, &block_mig_state); |
c163b5ca | 495 | } |