Revision a55eb92c block-migration.c
| b/block-migration.c | ||
|---|---|---|
| 21 | 21 |
#define SECTOR_SIZE (1 << SECTOR_BITS) |
| 22 | 22 |
#define SECTOR_MASK ~(SECTOR_SIZE - 1); |
| 23 | 23 |
|
| 24 |
#define BLOCK_SIZE (block_mig_state->sectors_per_block << SECTOR_BITS)
|
|
| 24 |
#define BLOCK_SIZE (block_mig_state->sectors_per_block << SECTOR_BITS) |
|
| 25 | 25 |
|
| 26 | 26 |
#define BLK_MIG_FLAG_DEVICE_BLOCK 0x01 |
| 27 | 27 |
#define BLK_MIG_FLAG_EOS 0x02 |
| ... | ... | |
| 34 | 34 |
//#define DEBUG_BLK_MIGRATION |
| 35 | 35 |
|
| 36 | 36 |
#ifdef DEBUG_BLK_MIGRATION |
| 37 |
#define dprintf(fmt, ...) \
|
|
| 37 |
#define dprintf(fmt, ...) \
|
|
| 38 | 38 |
do { printf("blk_migration: " fmt, ## __VA_ARGS__); } while (0)
|
| 39 | 39 |
#else |
| 40 |
#define dprintf(fmt, ...) \
|
|
| 40 |
#define dprintf(fmt, ...) \
|
|
| 41 | 41 |
do { } while (0)
|
| 42 | 42 |
#endif |
| 43 | 43 |
|
| 44 |
typedef struct BlkMigDevState {
|
|
| 45 |
BlockDriverState *bs; |
|
| 46 |
int bulk_completed; |
|
| 47 |
int shared_base; |
|
| 48 |
struct BlkMigDevState *next; |
|
| 49 |
int64_t cur_sector; |
|
| 50 |
int64_t total_sectors; |
|
| 51 |
int64_t dirty; |
|
| 52 |
} BlkMigDevState; |
|
| 53 |
|
|
| 44 | 54 |
typedef struct BlkMigBlock {
|
| 45 | 55 |
uint8_t *buf; |
| 46 | 56 |
BlkMigDevState *bmds; |
| ... | ... | |
| 68 | 78 |
int64_t print_completion; |
| 69 | 79 |
} BlkMigState; |
| 70 | 80 |
|
| 71 |
static BlkMigState *block_mig_state = NULL;
|
|
| 81 |
static BlkMigState *block_mig_state = NULL; |
|
| 72 | 82 |
|
| 73 | 83 |
static void blk_mig_read_cb(void *opaque, int ret) |
| 74 | 84 |
{
|
| 75 | 85 |
BlkMigBlock *blk = opaque; |
| 76 |
|
|
| 86 |
|
|
| 77 | 87 |
blk->ret = ret; |
| 78 |
|
|
| 88 |
|
|
| 79 | 89 |
/* insert at the end */ |
| 80 |
if(block_mig_state->last_blk == NULL) {
|
|
| 90 |
if (block_mig_state->last_blk == NULL) {
|
|
| 81 | 91 |
block_mig_state->first_blk = blk; |
| 82 | 92 |
block_mig_state->last_blk = blk; |
| 83 | 93 |
} else {
|
| 84 | 94 |
block_mig_state->last_blk->next = blk; |
| 85 | 95 |
block_mig_state->last_blk = blk; |
| 86 | 96 |
} |
| 87 |
|
|
| 97 |
|
|
| 88 | 98 |
block_mig_state->submitted--; |
| 89 | 99 |
block_mig_state->read_done++; |
| 90 | 100 |
assert(block_mig_state->submitted >= 0); |
| 91 |
|
|
| 92 |
return; |
|
| 93 | 101 |
} |
| 94 | 102 |
|
| 95 | 103 |
static int mig_read_device_bulk(QEMUFile *f, BlkMigDevState *bms) |
| 96 |
{
|
|
| 104 |
{
|
|
| 97 | 105 |
int nr_sectors; |
| 98 | 106 |
int64_t total_sectors, cur_sector = 0; |
| 99 | 107 |
BlockDriverState *bs = bms->bs; |
| 100 | 108 |
BlkMigBlock *blk; |
| 101 |
|
|
| 109 |
|
|
| 102 | 110 |
blk = qemu_malloc(sizeof(BlkMigBlock)); |
| 103 | 111 |
blk->buf = qemu_malloc(BLOCK_SIZE); |
| 104 |
|
|
| 112 |
|
|
| 105 | 113 |
cur_sector = bms->cur_sector; |
| 106 | 114 |
total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
| 107 |
|
|
| 108 |
if(bms->shared_base) {
|
|
| 109 |
while(cur_sector < bms->total_sectors &&
|
|
| 110 |
!bdrv_is_allocated(bms->bs, cur_sector,
|
|
| 111 |
MAX_IS_ALLOCATED_SEARCH, &nr_sectors)) {
|
|
| 115 |
|
|
| 116 |
if (bms->shared_base) {
|
|
| 117 |
while (cur_sector < bms->total_sectors &&
|
|
| 118 |
!bdrv_is_allocated(bms->bs, cur_sector,
|
|
| 119 |
MAX_IS_ALLOCATED_SEARCH, &nr_sectors)) {
|
|
| 112 | 120 |
cur_sector += nr_sectors; |
| 113 | 121 |
} |
| 114 | 122 |
} |
| 115 |
|
|
| 116 |
if(cur_sector >= total_sectors) {
|
|
| 123 |
|
|
| 124 |
if (cur_sector >= total_sectors) {
|
|
| 117 | 125 |
bms->cur_sector = total_sectors; |
| 118 | 126 |
qemu_free(blk->buf); |
| 119 | 127 |
qemu_free(blk); |
| 120 | 128 |
return 1; |
| 121 | 129 |
} |
| 122 |
|
|
| 123 |
if(cur_sector >= block_mig_state->print_completion) {
|
|
| 130 |
|
|
| 131 |
if (cur_sector >= block_mig_state->print_completion) {
|
|
| 124 | 132 |
printf("Completed %" PRId64 " %%\r", cur_sector * 100 / total_sectors);
|
| 125 | 133 |
fflush(stdout); |
| 126 |
block_mig_state->print_completion +=
|
|
| 134 |
block_mig_state->print_completion += |
|
| 127 | 135 |
(block_mig_state->sectors_per_block * 10000); |
| 128 | 136 |
} |
| 129 |
|
|
| 137 |
|
|
| 130 | 138 |
/* we going to transfder BLOCK_SIZE any way even if it is not allocated */ |
| 131 | 139 |
nr_sectors = block_mig_state->sectors_per_block; |
| 132 | 140 |
|
| 133 | 141 |
cur_sector &= ~((int64_t)block_mig_state->sectors_per_block -1); |
| 134 |
|
|
| 135 |
if(total_sectors - cur_sector < block_mig_state->sectors_per_block) {
|
|
| 142 |
|
|
| 143 |
if (total_sectors - cur_sector < block_mig_state->sectors_per_block) {
|
|
| 136 | 144 |
nr_sectors = (total_sectors - cur_sector); |
| 137 | 145 |
} |
| 138 |
|
|
| 146 |
|
|
| 139 | 147 |
bms->cur_sector = cur_sector + nr_sectors; |
| 140 | 148 |
blk->sector = cur_sector; |
| 141 | 149 |
blk->bmds = bms; |
| 142 | 150 |
blk->next = NULL; |
| 143 |
|
|
| 151 |
|
|
| 144 | 152 |
blk->iov.iov_base = blk->buf; |
| 145 | 153 |
blk->iov.iov_len = nr_sectors * SECTOR_SIZE; |
| 146 | 154 |
qemu_iovec_init_external(&blk->qiov, &blk->iov, 1); |
| 147 |
|
|
| 155 |
|
|
| 148 | 156 |
blk->aiocb = bdrv_aio_readv(bs, cur_sector, &blk->qiov, |
| 149 | 157 |
nr_sectors, blk_mig_read_cb, blk); |
| 150 |
|
|
| 151 |
if(!blk->aiocb) {
|
|
| 158 |
|
|
| 159 |
if (!blk->aiocb) {
|
|
| 152 | 160 |
printf("Error reading sector %" PRId64 "\n", cur_sector);
|
| 153 | 161 |
qemu_free(blk->buf); |
| 154 | 162 |
qemu_free(blk); |
| ... | ... | |
| 157 | 165 |
|
| 158 | 166 |
bdrv_reset_dirty(bms->bs, cur_sector, nr_sectors); |
| 159 | 167 |
block_mig_state->submitted++; |
| 160 |
|
|
| 168 |
|
|
| 161 | 169 |
return (bms->cur_sector >= total_sectors); |
| 162 | 170 |
} |
| 163 | 171 |
|
| 164 | 172 |
static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds) |
| 165 |
{
|
|
| 173 |
{
|
|
| 166 | 174 |
int len, nr_sectors; |
| 167 | 175 |
int64_t total_sectors = bmds->total_sectors, cur_sector = 0; |
| 168 | 176 |
uint8_t *tmp_buf = NULL; |
| 169 | 177 |
BlockDriverState *bs = bmds->bs; |
| 170 | 178 |
|
| 171 | 179 |
tmp_buf = qemu_malloc(BLOCK_SIZE); |
| 172 |
|
|
| 180 |
|
|
| 173 | 181 |
cur_sector = bmds->cur_sector; |
| 174 |
|
|
| 175 |
if(bmds->shared_base) {
|
|
| 176 |
while(cur_sector < bmds->total_sectors &&
|
|
| 177 |
!bdrv_is_allocated(bmds->bs, cur_sector,
|
|
| 178 |
MAX_IS_ALLOCATED_SEARCH, &nr_sectors)) {
|
|
| 182 |
|
|
| 183 |
if (bmds->shared_base) {
|
|
| 184 |
while (cur_sector < bmds->total_sectors &&
|
|
| 185 |
!bdrv_is_allocated(bmds->bs, cur_sector,
|
|
| 186 |
MAX_IS_ALLOCATED_SEARCH, &nr_sectors)) {
|
|
| 179 | 187 |
cur_sector += nr_sectors; |
| 180 | 188 |
} |
| 181 | 189 |
} |
| 182 |
|
|
| 183 |
if(cur_sector >= total_sectors) {
|
|
| 190 |
|
|
| 191 |
if (cur_sector >= total_sectors) {
|
|
| 184 | 192 |
bmds->cur_sector = total_sectors; |
| 185 | 193 |
qemu_free(tmp_buf); |
| 186 | 194 |
return 1; |
| 187 | 195 |
} |
| 188 |
|
|
| 189 |
if(cur_sector >= block_mig_state->print_completion) {
|
|
| 196 |
|
|
| 197 |
if (cur_sector >= block_mig_state->print_completion) {
|
|
| 190 | 198 |
printf("Completed %" PRId64 " %%\r", cur_sector * 100 / total_sectors);
|
| 191 | 199 |
fflush(stdout); |
| 192 |
block_mig_state->print_completion +=
|
|
| 200 |
block_mig_state->print_completion += |
|
| 193 | 201 |
(block_mig_state->sectors_per_block * 10000); |
| 194 | 202 |
} |
| 195 |
|
|
| 203 |
|
|
| 196 | 204 |
cur_sector &= ~((int64_t)block_mig_state->sectors_per_block -1); |
| 197 |
|
|
| 198 |
/* we going to transfer |
|
| 199 |
BLOCK_SIZE |
|
| 200 |
any way even if it is not allocated */ |
|
| 205 |
|
|
| 206 |
/* we going to transfer BLOCK_SIZE any way even if it is not allocated */ |
|
| 201 | 207 |
nr_sectors = block_mig_state->sectors_per_block; |
| 202 |
|
|
| 203 |
if(total_sectors - cur_sector < block_mig_state->sectors_per_block) {
|
|
| 208 |
|
|
| 209 |
if (total_sectors - cur_sector < block_mig_state->sectors_per_block) {
|
|
| 204 | 210 |
nr_sectors = (total_sectors - cur_sector); |
| 205 | 211 |
} |
| 206 |
|
|
| 207 |
if(bdrv_read(bs, cur_sector, tmp_buf, nr_sectors) < 0) {
|
|
| 212 |
|
|
| 213 |
if (bdrv_read(bs, cur_sector, tmp_buf, nr_sectors) < 0) {
|
|
| 208 | 214 |
printf("Error reading sector %" PRId64 "\n", cur_sector);
|
| 209 | 215 |
} |
| 210 | 216 |
|
| 211 | 217 |
bdrv_reset_dirty(bs, cur_sector, nr_sectors); |
| 212 |
|
|
| 213 |
/* Device name */ |
|
| 214 |
qemu_put_be64(f,(cur_sector << SECTOR_BITS) | BLK_MIG_FLAG_DEVICE_BLOCK); |
|
| 215 |
|
|
| 218 |
|
|
| 219 |
/* sector number and flags */ |
|
| 220 |
qemu_put_be64(f, (cur_sector << SECTOR_BITS) | BLK_MIG_FLAG_DEVICE_BLOCK); |
|
| 221 |
|
|
| 222 |
/* device name */ |
|
| 216 | 223 |
len = strlen(bs->device_name); |
| 217 | 224 |
qemu_put_byte(f, len); |
| 218 | 225 |
qemu_put_buffer(f, (uint8_t *)bs->device_name, len); |
| 219 |
|
|
| 220 |
qemu_put_buffer(f, tmp_buf, |
|
| 221 |
BLOCK_SIZE); |
|
| 222 |
|
|
| 226 |
|
|
| 227 |
qemu_put_buffer(f, tmp_buf, BLOCK_SIZE); |
|
| 228 |
|
|
| 223 | 229 |
bmds->cur_sector = cur_sector + block_mig_state->sectors_per_block; |
| 224 |
|
|
| 230 |
|
|
| 225 | 231 |
qemu_free(tmp_buf); |
| 226 |
|
|
| 232 |
|
|
| 227 | 233 |
return (bmds->cur_sector >= total_sectors); |
| 228 | 234 |
} |
| 229 | 235 |
|
| 230 | 236 |
static void send_blk(QEMUFile *f, BlkMigBlock * blk) |
| 231 | 237 |
{
|
| 232 | 238 |
int len; |
| 233 |
|
|
| 234 |
/* Device name */ |
|
| 235 |
qemu_put_be64(f,(blk->sector << SECTOR_BITS) | BLK_MIG_FLAG_DEVICE_BLOCK); |
|
| 236 |
|
|
| 239 |
|
|
| 240 |
/* sector number and flags */ |
|
| 241 |
qemu_put_be64(f, (blk->sector << SECTOR_BITS) | BLK_MIG_FLAG_DEVICE_BLOCK); |
|
| 242 |
|
|
| 243 |
/* device name */ |
|
| 237 | 244 |
len = strlen(blk->bmds->bs->device_name); |
| 238 | 245 |
qemu_put_byte(f, len); |
| 239 | 246 |
qemu_put_buffer(f, (uint8_t *)blk->bmds->bs->device_name, len); |
| 240 |
|
|
| 241 |
qemu_put_buffer(f, blk->buf, |
|
| 242 |
BLOCK_SIZE); |
|
| 243 |
|
|
| 244 |
return; |
|
| 247 |
|
|
| 248 |
qemu_put_buffer(f, blk->buf, BLOCK_SIZE); |
|
| 245 | 249 |
} |
| 246 | 250 |
|
| 247 | 251 |
static void blk_mig_save_dev_info(QEMUFile *f, BlkMigDevState *bmds) |
| ... | ... | |
| 251 | 255 |
static void set_dirty_tracking(int enable) |
| 252 | 256 |
{
|
| 253 | 257 |
BlkMigDevState *bmds; |
| 254 |
for(bmds = block_mig_state->bmds_first; bmds != NULL; bmds = bmds->next) {
|
|
| 255 |
bdrv_set_dirty_tracking(bmds->bs,enable); |
|
| 258 |
for (bmds = block_mig_state->bmds_first; bmds != NULL; bmds = bmds->next) {
|
|
| 259 |
bdrv_set_dirty_tracking(bmds->bs, enable);
|
|
| 256 | 260 |
} |
| 257 |
|
|
| 258 |
return; |
|
| 259 | 261 |
} |
| 260 | 262 |
|
| 261 | 263 |
static void init_blk_migration(QEMUFile *f) |
| 262 | 264 |
{
|
| 263 | 265 |
BlkMigDevState **pbmds, *bmds; |
| 264 | 266 |
BlockDriverState *bs; |
| 265 |
|
|
| 267 |
|
|
| 266 | 268 |
for (bs = bdrv_first; bs != NULL; bs = bs->next) {
|
| 267 |
if(bs->type == BDRV_TYPE_HD) {
|
|
| 269 |
if (bs->type == BDRV_TYPE_HD) {
|
|
| 268 | 270 |
bmds = qemu_mallocz(sizeof(BlkMigDevState)); |
| 269 | 271 |
bmds->bs = bs; |
| 270 | 272 |
bmds->bulk_completed = 0; |
| 271 | 273 |
bmds->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
| 272 | 274 |
bmds->shared_base = block_mig_state->shared_base; |
| 273 |
|
|
| 274 |
if(bmds->shared_base) {
|
|
| 275 |
printf("Start migration for %s with shared base image\n",
|
|
| 275 |
|
|
| 276 |
if (bmds->shared_base) {
|
|
| 277 |
printf("Start migration for %s with shared base image\n",
|
|
| 276 | 278 |
bs->device_name); |
| 277 | 279 |
} else {
|
| 278 | 280 |
printf("Start full migration for %s\n", bs->device_name);
|
| 279 | 281 |
} |
| 280 |
|
|
| 282 |
|
|
| 281 | 283 |
/* insert at the end */ |
| 282 | 284 |
pbmds = &block_mig_state->bmds_first; |
| 283 |
while (*pbmds != NULL) |
|
| 285 |
while (*pbmds != NULL) {
|
|
| 284 | 286 |
pbmds = &(*pbmds)->next; |
| 287 |
} |
|
| 285 | 288 |
*pbmds = bmds; |
| 286 |
|
|
| 289 |
|
|
| 287 | 290 |
blk_mig_save_dev_info(f, bmds); |
| 288 |
|
|
| 289 | 291 |
} |
| 290 |
}
|
|
| 291 |
|
|
| 292 |
} |
|
| 293 |
|
|
| 292 | 294 |
block_mig_state->sectors_per_block = bdrv_get_sectors_per_chunk(); |
| 293 |
|
|
| 294 |
return; |
|
| 295 | 295 |
} |
| 296 | 296 |
|
| 297 | 297 |
static int blk_mig_save_bulked_block(QEMUFile *f, int is_async) |
| ... | ... | |
| 299 | 299 |
BlkMigDevState *bmds; |
| 300 | 300 |
|
| 301 | 301 |
for (bmds = block_mig_state->bmds_first; bmds != NULL; bmds = bmds->next) {
|
| 302 |
if(bmds->bulk_completed == 0) {
|
|
| 303 |
if(is_async) {
|
|
| 304 |
if(mig_read_device_bulk(f, bmds) == 1) {
|
|
| 302 |
if (bmds->bulk_completed == 0) {
|
|
| 303 |
if (is_async) {
|
|
| 304 |
if (mig_read_device_bulk(f, bmds) == 1) {
|
|
| 305 | 305 |
/* completed bulk section for this device */ |
| 306 | 306 |
bmds->bulk_completed = 1; |
| 307 | 307 |
} |
| 308 | 308 |
} else {
|
| 309 |
if(mig_save_device_bulk(f,bmds) == 1) {
|
|
| 309 |
if (mig_save_device_bulk(f, bmds) == 1) {
|
|
| 310 | 310 |
/* completed bulk section for this device */ |
| 311 | 311 |
bmds->bulk_completed = 1; |
| 312 | 312 |
} |
| ... | ... | |
| 314 | 314 |
return 1; |
| 315 | 315 |
} |
| 316 | 316 |
} |
| 317 |
|
|
| 317 |
|
|
| 318 | 318 |
/* we reached here means bulk is completed */ |
| 319 | 319 |
block_mig_state->bulk_completed = 1; |
| 320 |
|
|
| 320 |
|
|
| 321 | 321 |
return 0; |
| 322 |
|
|
| 323 | 322 |
} |
| 324 | 323 |
|
| 325 | 324 |
#define MAX_NUM_BLOCKS 4 |
| ... | ... | |
| 330 | 329 |
uint8_t buf[BLOCK_SIZE]; |
| 331 | 330 |
int64_t sector; |
| 332 | 331 |
int len; |
| 333 |
|
|
| 334 |
for(bmds = block_mig_state->bmds_first; bmds != NULL; bmds = bmds->next) {
|
|
| 335 |
for(sector = 0; sector < bmds->cur_sector;) {
|
|
| 336 |
|
|
| 337 |
if(bdrv_get_dirty(bmds->bs,sector)) {
|
|
| 338 |
|
|
| 339 |
if(bdrv_read(bmds->bs, sector, buf, |
|
| 340 |
block_mig_state->sectors_per_block) < 0) {
|
|
| 332 |
|
|
| 333 |
for (bmds = block_mig_state->bmds_first; bmds != NULL; bmds = bmds->next) {
|
|
| 334 |
for (sector = 0; sector < bmds->cur_sector;) {
|
|
| 335 |
if (bdrv_get_dirty(bmds->bs, sector)) {
|
|
| 336 |
if (bdrv_read(bmds->bs, sector, buf, |
|
| 337 |
block_mig_state->sectors_per_block) < 0) {
|
|
| 338 |
/* FIXME: add error handling */ |
|
| 341 | 339 |
} |
| 342 |
|
|
| 340 |
|
|
| 341 |
/* sector number and flags */ |
|
| 342 |
qemu_put_be64(f, (sector << SECTOR_BITS) |
|
| 343 |
| BLK_MIG_FLAG_DEVICE_BLOCK); |
|
| 344 |
|
|
| 343 | 345 |
/* device name */ |
| 344 |
qemu_put_be64(f,(sector << SECTOR_BITS) |
|
| 345 |
| BLK_MIG_FLAG_DEVICE_BLOCK); |
|
| 346 |
|
|
| 347 | 346 |
len = strlen(bmds->bs->device_name); |
| 348 |
|
|
| 349 | 347 |
qemu_put_byte(f, len); |
| 350 | 348 |
qemu_put_buffer(f, (uint8_t *)bmds->bs->device_name, len); |
| 351 |
|
|
| 352 |
qemu_put_buffer(f, buf,
|
|
| 353 |
(block_mig_state->sectors_per_block *
|
|
| 349 |
|
|
| 350 |
qemu_put_buffer(f, buf, |
|
| 351 |
(block_mig_state->sectors_per_block * |
|
| 354 | 352 |
SECTOR_SIZE)); |
| 355 |
|
|
| 356 |
bdrv_reset_dirty(bmds->bs, sector,
|
|
| 353 |
|
|
| 354 |
bdrv_reset_dirty(bmds->bs, sector, |
|
| 357 | 355 |
block_mig_state->sectors_per_block); |
| 358 |
|
|
| 359 |
sector += block_mig_state->sectors_per_block; |
|
| 360 |
} else {
|
|
| 361 |
/* sector is clean */ |
|
| 362 |
sector += block_mig_state->sectors_per_block; |
|
| 363 |
} |
|
| 356 |
} |
|
| 357 |
sector += block_mig_state->sectors_per_block; |
|
| 364 | 358 |
} |
| 365 | 359 |
} |
| 366 |
|
|
| 367 |
return; |
|
| 368 | 360 |
} |
| 369 | 361 |
|
| 370 | 362 |
static void flush_blks(QEMUFile* f) |
| 371 | 363 |
{
|
| 372 |
BlkMigBlock *blk, *tmp;
|
|
| 373 |
|
|
| 374 |
dprintf("%s Enter submitted %d read_done %d transfered\n", __FUNCTION__,
|
|
| 364 |
BlkMigBlock *blk, *next;
|
|
| 365 |
|
|
| 366 |
dprintf("%s Enter submitted %d read_done %d transfered\n", __FUNCTION__,
|
|
| 375 | 367 |
submitted, read_done, transfered); |
| 376 |
|
|
| 377 |
for(blk = block_mig_state->first_blk; |
|
| 378 |
blk != NULL && !qemu_file_rate_limit(f); blk = tmp) {
|
|
| 368 |
|
|
| 369 |
for (blk = block_mig_state->first_blk; |
|
| 370 |
blk != NULL && !qemu_file_rate_limit(f); |
|
| 371 |
blk = next) {
|
|
| 379 | 372 |
send_blk(f, blk); |
| 380 |
|
|
| 381 |
tmp = blk->next;
|
|
| 373 |
|
|
| 374 |
next = blk->next;
|
|
| 382 | 375 |
qemu_free(blk->buf); |
| 383 | 376 |
qemu_free(blk); |
| 384 |
|
|
| 377 |
|
|
| 385 | 378 |
block_mig_state->read_done--; |
| 386 | 379 |
block_mig_state->transferred++; |
| 387 | 380 |
assert(block_mig_state->read_done >= 0); |
| 388 | 381 |
} |
| 389 | 382 |
block_mig_state->first_blk = blk; |
| 390 |
|
|
| 391 |
if(block_mig_state->first_blk == NULL) {
|
|
| 383 |
|
|
| 384 |
if (block_mig_state->first_blk == NULL) {
|
|
| 392 | 385 |
block_mig_state->last_blk = NULL; |
| 393 | 386 |
} |
| 394 | 387 |
|
| 395 |
dprintf("%s Exit submitted %d read_done %d transferred%d\n", __FUNCTION__,
|
|
| 396 |
block_mig_state->submitted, block_mig_state->read_done,
|
|
| 388 |
dprintf("%s Exit submitted %d read_done %d transferred%d\n", __FUNCTION__,
|
|
| 389 |
block_mig_state->submitted, block_mig_state->read_done, |
|
| 397 | 390 |
block_mig_state->transferred); |
| 398 |
|
|
| 399 |
return; |
|
| 400 | 391 |
} |
| 401 | 392 |
|
| 402 | 393 |
static int is_stage2_completed(void) |
| 403 | 394 |
{
|
| 404 | 395 |
BlkMigDevState *bmds; |
| 405 |
|
|
| 406 |
if(block_mig_state->submitted > 0) {
|
|
| 396 |
|
|
| 397 |
if (block_mig_state->submitted > 0) {
|
|
| 407 | 398 |
return 0; |
| 408 | 399 |
} |
| 409 |
|
|
| 400 |
|
|
| 410 | 401 |
for (bmds = block_mig_state->bmds_first; bmds != NULL; bmds = bmds->next) {
|
| 411 |
if(bmds->bulk_completed == 0) {
|
|
| 402 |
if (bmds->bulk_completed == 0) {
|
|
| 412 | 403 |
return 0; |
| 413 | 404 |
} |
| 414 | 405 |
} |
| 415 |
|
|
| 406 |
|
|
| 416 | 407 |
return 1; |
| 417 | 408 |
} |
| 418 | 409 |
|
| 419 | 410 |
static int block_save_live(QEMUFile *f, int stage, void *opaque) |
| 420 | 411 |
{
|
| 421 |
int ret = 1; |
|
| 422 |
|
|
| 423 |
dprintf("Enter save live stage %d submitted %d transferred %d\n", stage,
|
|
| 412 |
dprintf("Enter save live stage %d submitted %d transferred %d\n", stage,
|
|
| 424 | 413 |
submitted, transferred); |
| 425 |
|
|
| 426 |
if(block_mig_state->blk_enable != 1) {
|
|
| 414 |
|
|
| 415 |
if (block_mig_state->blk_enable != 1) {
|
|
| 427 | 416 |
/* no need to migrate storage */ |
| 428 |
|
|
| 429 |
qemu_put_be64(f,BLK_MIG_FLAG_EOS); |
|
| 417 |
qemu_put_be64(f, BLK_MIG_FLAG_EOS); |
|
| 430 | 418 |
return 1; |
| 431 | 419 |
} |
| 432 |
|
|
| 433 |
if(stage == 1) {
|
|
| 420 |
|
|
| 421 |
if (stage == 1) {
|
|
| 434 | 422 |
init_blk_migration(f); |
| 435 |
|
|
| 423 |
|
|
| 436 | 424 |
/* start track dirty blocks */ |
| 437 | 425 |
set_dirty_tracking(1); |
| 438 |
|
|
| 439 | 426 |
} |
| 440 | 427 |
|
| 441 | 428 |
flush_blks(f); |
| 442 |
|
|
| 429 |
|
|
| 443 | 430 |
/* control the rate of transfer */ |
| 444 |
while ((block_mig_state->submitted + block_mig_state->read_done) * |
|
| 445 |
(BLOCK_SIZE) < |
|
| 446 |
(qemu_file_get_rate_limit(f))) {
|
|
| 447 |
|
|
| 448 |
ret = blk_mig_save_bulked_block(f, 1); |
|
| 449 |
|
|
| 450 |
if (ret == 0) /* no more bulk blocks for now*/ |
|
| 431 |
while ((block_mig_state->submitted + |
|
| 432 |
block_mig_state->read_done) * BLOCK_SIZE < |
|
| 433 |
qemu_file_get_rate_limit(f)) {
|
|
| 434 |
if (blk_mig_save_bulked_block(f, 1) == 0) {
|
|
| 435 |
/* no more bulk blocks for now */ |
|
| 451 | 436 |
break; |
| 437 |
} |
|
| 452 | 438 |
} |
| 453 |
|
|
| 439 |
|
|
| 454 | 440 |
flush_blks(f); |
| 455 |
|
|
| 456 |
if(stage == 3) {
|
|
| 457 |
|
|
| 458 |
while(blk_mig_save_bulked_block(f, 0) != 0); |
|
| 459 |
|
|
| 441 |
|
|
| 442 |
if (stage == 3) {
|
|
| 443 |
while (blk_mig_save_bulked_block(f, 0) != 0) {
|
|
| 444 |
/* empty */ |
|
| 445 |
} |
|
| 446 |
|
|
| 460 | 447 |
blk_mig_save_dirty_blocks(f); |
| 461 |
|
|
| 448 |
|
|
| 462 | 449 |
/* stop track dirty blocks */ |
| 463 |
set_dirty_tracking(0);;
|
|
| 464 |
|
|
| 465 |
printf("\nBlock migration completed\n");
|
|
| 450 |
set_dirty_tracking(0); |
|
| 451 |
|
|
| 452 |
printf("\nBlock migration completed\n");
|
|
| 466 | 453 |
} |
| 467 |
|
|
| 468 |
qemu_put_be64(f,BLK_MIG_FLAG_EOS); |
|
| 469 |
|
|
| 454 |
|
|
| 455 |
qemu_put_be64(f, BLK_MIG_FLAG_EOS);
|
|
| 456 |
|
|
| 470 | 457 |
return ((stage == 2) && is_stage2_completed()); |
| 471 | 458 |
} |
| 472 | 459 |
|
| ... | ... | |
| 477 | 464 |
int64_t addr; |
| 478 | 465 |
BlockDriverState *bs; |
| 479 | 466 |
uint8_t *buf; |
| 480 |
|
|
| 467 |
|
|
| 481 | 468 |
block_mig_state->sectors_per_block = bdrv_get_sectors_per_chunk(); |
| 482 | 469 |
buf = qemu_malloc(BLOCK_SIZE); |
| 483 |
|
|
| 470 |
|
|
| 484 | 471 |
do {
|
| 485 |
|
|
| 486 | 472 |
addr = qemu_get_be64(f); |
| 487 |
|
|
| 473 |
|
|
| 488 | 474 |
flags = addr & ~SECTOR_MASK; |
| 489 | 475 |
addr &= SECTOR_MASK; |
| 490 |
|
|
| 491 |
if(flags & BLK_MIG_FLAG_DEVICE_BLOCK) {
|
|
| 492 |
|
|
| 476 |
|
|
| 477 |
if (flags & BLK_MIG_FLAG_DEVICE_BLOCK) {
|
|
| 493 | 478 |
/* get device name */ |
| 494 | 479 |
len = qemu_get_byte(f); |
| 495 |
|
|
| 480 |
|
|
| 496 | 481 |
qemu_get_buffer(f, (uint8_t *)device_name, len); |
| 497 | 482 |
device_name[len] = '\0'; |
| 498 |
|
|
| 483 |
|
|
| 499 | 484 |
bs = bdrv_find(device_name); |
| 500 |
|
|
| 501 |
qemu_get_buffer(f, buf, |
|
| 502 |
BLOCK_SIZE); |
|
| 503 |
if(bs != NULL) {
|
|
| 504 |
|
|
| 505 |
bdrv_write(bs, (addr >> SECTOR_BITS), |
|
| 485 |
|
|
| 486 |
qemu_get_buffer(f, buf, BLOCK_SIZE); |
|
| 487 |
if (bs != NULL) {
|
|
| 488 |
bdrv_write(bs, (addr >> SECTOR_BITS), |
|
| 506 | 489 |
buf, block_mig_state->sectors_per_block); |
| 507 | 490 |
} else {
|
| 508 | 491 |
printf("Error unknown block device %s\n", device_name);
|
| 492 |
/* FIXME: add error handling */ |
|
| 509 | 493 |
} |
| 510 |
} else if(flags & BLK_MIG_FLAG_EOS) {
|
|
| 511 |
|
|
| 512 |
} else {
|
|
| 494 |
} else if (!(flags & BLK_MIG_FLAG_EOS)) {
|
|
| 513 | 495 |
printf("Unknown flags\n");
|
| 496 |
/* FIXME: add error handling */ |
|
| 514 | 497 |
} |
| 515 |
} while(!(flags & BLK_MIG_FLAG_EOS)); |
|
| 516 |
|
|
| 498 |
} while (!(flags & BLK_MIG_FLAG_EOS));
|
|
| 499 |
|
|
| 517 | 500 |
qemu_free(buf); |
| 518 | 501 |
|
| 519 | 502 |
return 0; |
| ... | ... | |
| 525 | 508 |
|
| 526 | 509 |
block_mig_state->blk_enable = blk_enable; |
| 527 | 510 |
block_mig_state->shared_base = shared_base; |
| 528 |
|
|
| 511 |
|
|
| 529 | 512 |
/* shared base means that blk_enable = 1 */ |
| 530 | 513 |
block_mig_state->blk_enable |= shared_base; |
| 531 |
|
|
| 532 |
return; |
|
| 533 | 514 |
} |
| 534 | 515 |
|
| 535 | 516 |
void blk_mig_info(void) |
| 536 | 517 |
{
|
| 537 | 518 |
BlockDriverState *bs; |
| 538 |
|
|
| 519 |
|
|
| 539 | 520 |
for (bs = bdrv_first; bs != NULL; bs = bs->next) {
|
| 540 | 521 |
printf("Device %s\n", bs->device_name);
|
| 541 |
if(bs->type == BDRV_TYPE_HD) {
|
|
| 542 |
printf("device %s format %s\n",
|
|
| 522 |
if (bs->type == BDRV_TYPE_HD) {
|
|
| 523 |
printf("device %s format %s\n",
|
|
| 543 | 524 |
bs->device_name, bs->drv->format_name); |
| 544 | 525 |
} |
| 545 | 526 |
} |
| 546 | 527 |
} |
| 547 | 528 |
|
| 548 | 529 |
void blk_mig_init(void) |
| 549 |
{
|
|
| 550 |
|
|
| 530 |
{
|
|
| 551 | 531 |
block_mig_state = qemu_mallocz(sizeof(BlkMigState)); |
| 552 |
|
|
| 553 |
register_savevm_live("block", 0, 1, block_set_params, block_save_live,
|
|
| 554 |
NULL, block_load, block_mig_state); |
|
| 555 | 532 |
|
| 556 |
|
|
| 533 |
register_savevm_live("block", 0, 1, block_set_params, block_save_live,
|
|
| 534 |
NULL, block_load, block_mig_state); |
|
| 557 | 535 |
} |
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