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Diffstat (limited to 'block-migration.c')
-rw-r--r--block-migration.c149
1 files changed, 50 insertions, 99 deletions
diff --git a/block-migration.c b/block-migration.c
index 2f89a4ee9a..99fe3331c5 100644
--- a/block-migration.c
+++ b/block-migration.c
@@ -85,31 +85,25 @@ static void blk_mig_read_cb(void *opaque, int ret)
assert(block_mig_state.submitted >= 0);
}
-static int mig_read_device_bulk(QEMUFile *f, BlkMigDevState *bms)
+static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds, int is_async)
{
- int nr_sectors;
- int64_t total_sectors, cur_sector = 0;
- BlockDriverState *bs = bms->bs;
+ int64_t total_sectors = bmds->total_sectors;
+ int64_t cur_sector = bmds->cur_sector;
+ BlockDriverState *bs = bmds->bs;
+ int len, nr_sectors;
BlkMigBlock *blk;
+ uint8_t *tmp_buf;
- blk = qemu_malloc(sizeof(BlkMigBlock));
- blk->buf = qemu_malloc(BLOCK_SIZE);
-
- cur_sector = bms->cur_sector;
- total_sectors = bms->total_sectors;
-
- if (bms->shared_base) {
+ if (bmds->shared_base) {
while (cur_sector < total_sectors &&
- !bdrv_is_allocated(bms->bs, cur_sector,
- MAX_IS_ALLOCATED_SEARCH, &nr_sectors)) {
+ !bdrv_is_allocated(bs, cur_sector, MAX_IS_ALLOCATED_SEARCH,
+ &nr_sectors)) {
cur_sector += nr_sectors;
}
}
if (cur_sector >= total_sectors) {
- bms->cur_sector = total_sectors;
- qemu_free(blk->buf);
- qemu_free(blk);
+ bmds->cur_sector = total_sectors;
return 1;
}
@@ -120,101 +114,65 @@ static int mig_read_device_bulk(QEMUFile *f, BlkMigDevState *bms)
(BDRV_SECTORS_PER_DIRTY_CHUNK * 10000);
}
+ cur_sector &= ~((int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK - 1);
+
/* we are going to transfer a full block even if it is not allocated */
nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK;
- cur_sector &= ~((int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK - 1);
-
if (total_sectors - cur_sector < BDRV_SECTORS_PER_DIRTY_CHUNK) {
- nr_sectors = (total_sectors - cur_sector);
+ nr_sectors = total_sectors - cur_sector;
}
- bms->cur_sector = cur_sector + nr_sectors;
- blk->sector = cur_sector;
- blk->bmds = bms;
+ if (is_async) {
+ blk = qemu_malloc(sizeof(BlkMigBlock));
+ blk->buf = qemu_malloc(BLOCK_SIZE);
- blk->iov.iov_base = blk->buf;
- blk->iov.iov_len = nr_sectors * BDRV_SECTOR_SIZE;
- qemu_iovec_init_external(&blk->qiov, &blk->iov, 1);
+ bmds->cur_sector = cur_sector + nr_sectors;
+ blk->sector = cur_sector;
+ blk->bmds = bmds;
- blk->aiocb = bdrv_aio_readv(bs, cur_sector, &blk->qiov,
- nr_sectors, blk_mig_read_cb, blk);
+ blk->iov.iov_base = blk->buf;
+ blk->iov.iov_len = nr_sectors * BDRV_SECTOR_SIZE;
+ qemu_iovec_init_external(&blk->qiov, &blk->iov, 1);
- if (!blk->aiocb) {
- printf("Error reading sector %" PRId64 "\n", cur_sector);
- qemu_free(blk->buf);
- qemu_free(blk);
- return 0;
- }
-
- bdrv_reset_dirty(bms->bs, cur_sector, nr_sectors);
- block_mig_state.submitted++;
-
- return (bms->cur_sector >= total_sectors);
-}
+ blk->aiocb = bdrv_aio_readv(bs, cur_sector, &blk->qiov,
+ nr_sectors, blk_mig_read_cb, blk);
-static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds)
-{
- int len, nr_sectors;
- int64_t total_sectors = bmds->total_sectors, cur_sector = 0;
- uint8_t *tmp_buf = NULL;
- BlockDriverState *bs = bmds->bs;
+ if (!blk->aiocb) {
+ printf("Error reading sector %" PRId64 "\n", cur_sector);
+ qemu_free(blk->buf);
+ qemu_free(blk);
+ return 0;
+ }
- tmp_buf = qemu_malloc(BLOCK_SIZE);
+ bdrv_reset_dirty(bs, cur_sector, nr_sectors);
+ block_mig_state.submitted++;
- cur_sector = bmds->cur_sector;
+ } else {
+ tmp_buf = qemu_malloc(BLOCK_SIZE);
- if (bmds->shared_base) {
- while (cur_sector < total_sectors &&
- !bdrv_is_allocated(bmds->bs, cur_sector,
- MAX_IS_ALLOCATED_SEARCH, &nr_sectors)) {
- cur_sector += nr_sectors;
+ if (bdrv_read(bs, cur_sector, tmp_buf, nr_sectors) < 0) {
+ printf("Error reading sector %" PRId64 "\n", cur_sector);
}
- }
- if (cur_sector >= total_sectors) {
- bmds->cur_sector = total_sectors;
- qemu_free(tmp_buf);
- return 1;
- }
+ bdrv_reset_dirty(bs, cur_sector, nr_sectors);
- if (cur_sector >= block_mig_state.print_completion) {
- printf("Completed %" PRId64 " %%\r", cur_sector * 100 / total_sectors);
- fflush(stdout);
- block_mig_state.print_completion +=
- (BDRV_SECTORS_PER_DIRTY_CHUNK * 10000);
- }
+ /* sector number and flags */
+ qemu_put_be64(f, (cur_sector << BDRV_SECTOR_BITS)
+ | BLK_MIG_FLAG_DEVICE_BLOCK);
- cur_sector &= ~((int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK - 1);
+ /* device name */
+ len = strlen(bs->device_name);
+ qemu_put_byte(f, len);
+ qemu_put_buffer(f, (uint8_t *)bs->device_name, len);
- /* we are going to transfer a full block even if it is not allocated */
- nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK;
+ qemu_put_buffer(f, tmp_buf, BLOCK_SIZE);
- if (total_sectors - cur_sector < BDRV_SECTORS_PER_DIRTY_CHUNK) {
- nr_sectors = (total_sectors - cur_sector);
- }
+ bmds->cur_sector = cur_sector + BDRV_SECTORS_PER_DIRTY_CHUNK;
- if (bdrv_read(bs, cur_sector, tmp_buf, nr_sectors) < 0) {
- printf("Error reading sector %" PRId64 "\n", cur_sector);
+ qemu_free(tmp_buf);
}
- bdrv_reset_dirty(bs, cur_sector, nr_sectors);
-
- /* sector number and flags */
- qemu_put_be64(f, (cur_sector << BDRV_SECTOR_BITS)
- | BLK_MIG_FLAG_DEVICE_BLOCK);
-
- /* device name */
- len = strlen(bs->device_name);
- qemu_put_byte(f, len);
- qemu_put_buffer(f, (uint8_t *)bs->device_name, len);
-
- qemu_put_buffer(f, tmp_buf, BLOCK_SIZE);
-
- bmds->cur_sector = cur_sector + BDRV_SECTORS_PER_DIRTY_CHUNK;
-
- qemu_free(tmp_buf);
-
return (bmds->cur_sector >= total_sectors);
}
@@ -279,16 +237,9 @@ static int blk_mig_save_bulked_block(QEMUFile *f, int is_async)
QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) {
if (bmds->bulk_completed == 0) {
- if (is_async) {
- if (mig_read_device_bulk(f, bmds) == 1) {
- /* completed bulk section for this device */
- bmds->bulk_completed = 1;
- }
- } else {
- if (mig_save_device_bulk(f, bmds) == 1) {
- /* completed bulk section for this device */
- bmds->bulk_completed = 1;
- }
+ if (mig_save_device_bulk(f, bmds, is_async) == 1) {
+ /* completed bulk section for this device */
+ bmds->bulk_completed = 1;
}
return 1;
}
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-24 08:47:55 +0000