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block migration: Add support for restore progress reporting 

Inject progress report in percentage into the block live stream. This
can be read out and displayed easily on restore.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jan Kiszka 2009-12-01 15:20:17 +01:00 committed by Anthony Liguori
parent 25f236433f
commit 01e61e2d16
1 changed files with 22 additions and 8 deletions
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30
block-migration.c
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@ -23,6 +23,7 @@
#define BLK_MIG_FLAG_DEVICE_BLOCK 0x01
#define BLK_MIG_FLAG_EOS 0x02
#define BLK_MIG_FLAG_PROGRESS 0x04
#define MAX_IS_ALLOCATED_SEARCH 65536
#define MAX_BLOCKS_READ 10000
@ -70,7 +71,7 @@ typedef struct BlkMigState {
int read_done;
int transferred;
int64_t total_sector_sum;
int64_t print_completion;
int prev_progress;
} BlkMigState;
static BlkMigState block_mig_state;
@ -226,7 +227,7 @@ static void init_blk_migration(Monitor *mon, QEMUFile *f)
block_mig_state.read_done = 0;
block_mig_state.transferred = 0;
block_mig_state.total_sector_sum = 0;
block_mig_state.print_completion = 0;
block_mig_state.prev_progress = -1;
for (bs = bdrv_first; bs != NULL; bs = bs->next) {
if (bs->type == BDRV_TYPE_HD) {
@ -257,6 +258,7 @@ static int blk_mig_save_bulked_block(Monitor *mon, QEMUFile *f, int is_async)
{
int64_t completed_sector_sum = 0;
BlkMigDevState *bmds;
int progress;
int ret = 0;
QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) {
@ -273,13 +275,13 @@ static int blk_mig_save_bulked_block(Monitor *mon, QEMUFile *f, int is_async)
}
}
if (completed_sector_sum >= block_mig_state.print_completion) {
monitor_printf(mon, "Completed %" PRId64 " %%\r",
completed_sector_sum * 100 /
block_mig_state.total_sector_sum);
progress = completed_sector_sum * 100 / block_mig_state.total_sector_sum;
if (progress != block_mig_state.prev_progress) {
block_mig_state.prev_progress = progress;
qemu_put_be64(f, (progress << BDRV_SECTOR_BITS)
| BLK_MIG_FLAG_PROGRESS);
monitor_printf(mon, "Completed %d %%\r", progress);
monitor_flush(mon);
block_mig_state.print_completion +=
(BDRV_SECTORS_PER_DIRTY_CHUNK * 10000);
}
return ret;
@ -445,6 +447,9 @@ static int block_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque)
blk_mig_save_dirty_blocks(mon, f);
blk_mig_cleanup(mon);
/* report completion */
qemu_put_be64(f, (100 << BDRV_SECTOR_BITS) | BLK_MIG_FLAG_PROGRESS);
if (qemu_file_has_error(f)) {
return 0;
}
@ -459,6 +464,7 @@ static int block_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque)
static int block_load(QEMUFile *f, void *opaque, int version_id)
{
static int banner_printed;
int len, flags;
char device_name[256];
int64_t addr;
@ -490,6 +496,14 @@ static int block_load(QEMUFile *f, void *opaque, int version_id)
bdrv_write(bs, addr, buf, BDRV_SECTORS_PER_DIRTY_CHUNK);
qemu_free(buf);
} else if (flags & BLK_MIG_FLAG_PROGRESS) {
if (!banner_printed) {
printf("Receiving block device images\n");
banner_printed = 1;
}
printf("Completed %d %%%c", (int)addr,
(addr == 100) ? '\n' : '\r');
fflush(stdout);
} else if (!(flags & BLK_MIG_FLAG_EOS)) {
fprintf(stderr, "Unknown flags\n");
return -EINVAL;