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block/backup: simplify backup_incremental_init_copy_bitmap
Simplify backup_incremental_init_copy_bitmap using the function bdrv_dirty_bitmap_next_dirty_area. Note: move to job->len instead of bitmap size: it should not matter but less code. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20190429090842.57910-2-vsementsov@virtuozzo.com Signed-off-by: Max Reitz <mreitz@redhat.com>
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@ -394,43 +394,27 @@ static int coroutine_fn backup_run_incremental(BackupBlockJob *job)
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/* init copy_bitmap from sync_bitmap */
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static void backup_incremental_init_copy_bitmap(BackupBlockJob *job)
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{
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BdrvDirtyBitmapIter *dbi;
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int64_t offset;
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int64_t end = DIV_ROUND_UP(bdrv_dirty_bitmap_size(job->sync_bitmap),
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job->cluster_size);
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uint64_t offset = 0;
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uint64_t bytes = job->len;
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dbi = bdrv_dirty_iter_new(job->sync_bitmap);
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while ((offset = bdrv_dirty_iter_next(dbi)) != -1) {
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int64_t cluster = offset / job->cluster_size;
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int64_t next_cluster;
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while (bdrv_dirty_bitmap_next_dirty_area(job->sync_bitmap,
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&offset, &bytes))
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{
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uint64_t cluster = offset / job->cluster_size;
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uint64_t end_cluster = DIV_ROUND_UP(offset + bytes, job->cluster_size);
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offset += bdrv_dirty_bitmap_granularity(job->sync_bitmap);
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if (offset >= bdrv_dirty_bitmap_size(job->sync_bitmap)) {
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hbitmap_set(job->copy_bitmap, cluster, end - cluster);
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hbitmap_set(job->copy_bitmap, cluster, end_cluster - cluster);
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offset = end_cluster * job->cluster_size;
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if (offset >= job->len) {
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break;
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}
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offset = bdrv_dirty_bitmap_next_zero(job->sync_bitmap, offset,
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UINT64_MAX);
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if (offset == -1) {
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hbitmap_set(job->copy_bitmap, cluster, end - cluster);
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break;
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}
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next_cluster = DIV_ROUND_UP(offset, job->cluster_size);
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hbitmap_set(job->copy_bitmap, cluster, next_cluster - cluster);
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if (next_cluster >= end) {
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break;
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}
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bdrv_set_dirty_iter(dbi, next_cluster * job->cluster_size);
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bytes = job->len - offset;
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}
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/* TODO job_progress_set_remaining() would make more sense */
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job_progress_update(&job->common.job,
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job->len - hbitmap_count(job->copy_bitmap) * job->cluster_size);
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bdrv_dirty_iter_free(dbi);
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}
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static int coroutine_fn backup_run(Job *job, Error **errp)
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