diff options
| -rw-r--r-- | block/qcow2-cluster.c | 10 | ||||
| -rw-r--r-- | block/qcow2.c | 14 | ||||
| -rw-r--r-- | block/qcow2.h | 5 |
3 files changed, 14 insertions, 15 deletions
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index 94b7f13..c4752ee 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -856,7 +856,7 @@ static int do_alloc_cluster_offset(BlockDriverState *bs, uint64_t guest_offset, * Return 0 on success and -errno in error cases */ int qcow2_alloc_cluster_offset(BlockDriverState *bs, uint64_t offset, - int n_start, int n_end, int *num, QCowL2Meta *m) + int n_start, int n_end, int *num, uint64_t *host_offset, QCowL2Meta *m) { BDRVQcowState *s = bs->opaque; int l2_index, ret, sectors; @@ -929,7 +929,6 @@ again: /* If there is something left to allocate, do that now */ *m = (QCowL2Meta) { - .cluster_offset = cluster_offset, .nb_clusters = 0, }; qemu_co_queue_init(&m->dependent_requests); @@ -977,9 +976,11 @@ again: int alloc_n_start = keep_clusters == 0 ? n_start : 0; int nb_sectors = MIN(requested_sectors, avail_sectors); + if (keep_clusters == 0) { + cluster_offset = alloc_cluster_offset; + } + *m = (QCowL2Meta) { - .cluster_offset = keep_clusters == 0 ? - alloc_cluster_offset : cluster_offset, .alloc_offset = alloc_cluster_offset, .offset = alloc_offset & ~(s->cluster_size - 1), .nb_clusters = nb_clusters, @@ -1007,6 +1008,7 @@ again: assert(sectors > n_start); *num = sectors - n_start; + *host_offset = cluster_offset; return 0; diff --git a/block/qcow2.c b/block/qcow2.c index 71f870d..66ca12f 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -799,7 +799,7 @@ static coroutine_fn int qcow2_co_writev(BlockDriverState *bs, } ret = qcow2_alloc_cluster_offset(bs, sector_num << 9, - index_in_cluster, n_end, &cur_nr_sectors, l2meta); + index_in_cluster, n_end, &cur_nr_sectors, &cluster_offset, l2meta); if (ret < 0) { goto fail; } @@ -809,7 +809,6 @@ static coroutine_fn int qcow2_co_writev(BlockDriverState *bs, qcow2_mark_dirty(bs); } - cluster_offset = l2meta->cluster_offset; assert((cluster_offset & 511) == 0); qemu_iovec_reset(&hd_qiov); @@ -1132,6 +1131,7 @@ static int preallocate(BlockDriverState *bs) { uint64_t nb_sectors; uint64_t offset; + uint64_t host_offset = 0; int num; int ret; QCowL2Meta meta; @@ -1139,18 +1139,18 @@ static int preallocate(BlockDriverState *bs) nb_sectors = bdrv_getlength(bs) >> 9; offset = 0; qemu_co_queue_init(&meta.dependent_requests); - meta.cluster_offset = 0; while (nb_sectors) { num = MIN(nb_sectors, INT_MAX >> 9); - ret = qcow2_alloc_cluster_offset(bs, offset, 0, num, &num, &meta); + ret = qcow2_alloc_cluster_offset(bs, offset, 0, num, &num, + &host_offset, &meta); if (ret < 0) { return ret; } ret = qcow2_alloc_cluster_link_l2(bs, &meta); if (ret < 0) { - qcow2_free_any_clusters(bs, meta.cluster_offset, meta.nb_clusters); + qcow2_free_any_clusters(bs, meta.alloc_offset, meta.nb_clusters); return ret; } @@ -1169,10 +1169,10 @@ static int preallocate(BlockDriverState *bs) * all of the allocated clusters (otherwise we get failing reads after * EOF). Extend the image to the last allocated sector. */ - if (meta.cluster_offset != 0) { + if (host_offset != 0) { uint8_t buf[512]; memset(buf, 0, 512); - ret = bdrv_write(bs->file, (meta.cluster_offset >> 9) + num - 1, buf, 1); + ret = bdrv_write(bs->file, (host_offset >> 9) + num - 1, buf, 1); if (ret < 0) { return ret; } diff --git a/block/qcow2.h b/block/qcow2.h index 1106b33..24f10012 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -213,9 +213,6 @@ typedef struct QCowL2Meta /** Guest offset of the first newly allocated cluster */ uint64_t offset; - /** Host offset of the first cluster of the request */ - uint64_t cluster_offset; - /** Host offset of the first newly allocated cluster */ uint64_t alloc_offset; @@ -336,7 +333,7 @@ void qcow2_encrypt_sectors(BDRVQcowState *s, int64_t sector_num, int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset, int *num, uint64_t *cluster_offset); int qcow2_alloc_cluster_offset(BlockDriverState *bs, uint64_t offset, - int n_start, int n_end, int *num, QCowL2Meta *m); + int n_start, int n_end, int *num, uint64_t *host_offset, QCowL2Meta *m); uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs, uint64_t offset, int compressed_size); |