Revert "qcow2: Bring synchronous read/write back to life"
It was merely a workaround and the real fix is done now.
This reverts commit ef845c3bf4
.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
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db0ffc2402
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@ -306,8 +306,8 @@ void qcow2_encrypt_sectors(BDRVQcowState *s, int64_t sector_num,
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}
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int qcow2_read(BlockDriverState *bs, int64_t sector_num, uint8_t *buf,
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int nb_sectors)
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static int qcow_read(BlockDriverState *bs, int64_t sector_num,
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uint8_t *buf, int nb_sectors)
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{
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BDRVQcowState *s = bs->opaque;
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int ret, index_in_cluster, n, n1;
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@ -358,7 +358,7 @@ static int copy_sectors(BlockDriverState *bs, uint64_t start_sect,
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n = n_end - n_start;
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if (n <= 0)
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return 0;
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ret = qcow2_read(bs, start_sect + n_start, s->cluster_data, n);
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ret = qcow_read(bs, start_sect + n_start, s->cluster_data, n);
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if (ret < 0)
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return ret;
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if (s->crypt_method) {
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@ -934,51 +934,6 @@ static int qcow_make_empty(BlockDriverState *bs)
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return 0;
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}
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static int qcow2_write(BlockDriverState *bs, int64_t sector_num,
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const uint8_t *buf, int nb_sectors)
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{
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BDRVQcowState *s = bs->opaque;
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int ret, index_in_cluster, n;
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uint64_t cluster_offset;
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int n_end;
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QCowL2Meta l2meta;
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while (nb_sectors > 0) {
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memset(&l2meta, 0, sizeof(l2meta));
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index_in_cluster = sector_num & (s->cluster_sectors - 1);
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n_end = index_in_cluster + nb_sectors;
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if (s->crypt_method &&
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n_end > QCOW_MAX_CRYPT_CLUSTERS * s->cluster_sectors)
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n_end = QCOW_MAX_CRYPT_CLUSTERS * s->cluster_sectors;
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cluster_offset = qcow2_alloc_cluster_offset(bs, sector_num << 9,
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index_in_cluster,
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n_end, &n, &l2meta);
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if (!cluster_offset)
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return -1;
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if (s->crypt_method) {
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qcow2_encrypt_sectors(s, sector_num, s->cluster_data, buf, n, 1,
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&s->aes_encrypt_key);
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ret = bdrv_pwrite(s->hd, cluster_offset + index_in_cluster * 512,
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s->cluster_data, n * 512);
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} else {
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ret = bdrv_pwrite(s->hd, cluster_offset + index_in_cluster * 512, buf, n * 512);
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}
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if (ret != n * 512 || qcow2_alloc_cluster_link_l2(bs, cluster_offset, &l2meta) < 0) {
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qcow2_free_any_clusters(bs, cluster_offset, l2meta.nb_clusters);
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return -1;
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}
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nb_sectors -= n;
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sector_num += n;
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buf += n * 512;
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if (l2meta.nb_clusters != 0) {
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QLIST_REMOVE(&l2meta, next_in_flight);
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}
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}
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s->cluster_cache_offset = -1; /* disable compressed cache */
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return 0;
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}
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/* XXX: put compressed sectors first, then all the cluster aligned
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tables to avoid losing bytes in alignment */
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static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
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@ -1166,10 +1121,8 @@ static BlockDriver bdrv_qcow2 = {
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.bdrv_set_key = qcow_set_key,
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.bdrv_make_empty = qcow_make_empty,
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.bdrv_read = qcow2_read,
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.bdrv_write = qcow2_write,
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.bdrv_aio_readv = qcow_aio_readv,
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.bdrv_aio_writev = qcow_aio_writev,
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.bdrv_aio_readv = qcow_aio_readv,
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.bdrv_aio_writev = qcow_aio_writev,
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.bdrv_write_compressed = qcow_write_compressed,
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.bdrv_snapshot_create = qcow2_snapshot_create,
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@ -202,9 +202,6 @@ uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,
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int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, uint64_t cluster_offset,
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QCowL2Meta *m);
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int qcow2_read(BlockDriverState *bs, int64_t sector_num, uint8_t *buf,
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int nb_sectors);
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/* qcow2-snapshot.c functions */
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int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info);
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int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id);
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