diff options
| -rw-r--r-- | block/qcow2-cluster.c | 37 | ||||
| -rw-r--r-- | block/qcow2-refcount.c | 10 | ||||
| -rw-r--r-- | block/qcow2.h | 3 |
3 files changed, 26 insertions, 24 deletions
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index 179aa2c..9cc8f0f 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -380,8 +380,8 @@ fail: * as contiguous. (This allows it, for example, to stop at the first compressed * cluster which may require a different handling) */ -static int count_contiguous_clusters(int nb_clusters, int cluster_size, - uint64_t *l2_slice, uint64_t stop_flags) +static int count_contiguous_clusters(BlockDriverState *bs, int nb_clusters, + int cluster_size, uint64_t *l2_slice, uint64_t stop_flags) { int i; QCow2ClusterType first_cluster_type; @@ -394,7 +394,7 @@ static int count_contiguous_clusters(int nb_clusters, int cluster_size, } /* must be allocated */ - first_cluster_type = qcow2_get_cluster_type(first_entry); + first_cluster_type = qcow2_get_cluster_type(bs, first_entry); assert(first_cluster_type == QCOW2_CLUSTER_NORMAL || first_cluster_type == QCOW2_CLUSTER_ZERO_ALLOC); @@ -412,7 +412,8 @@ static int count_contiguous_clusters(int nb_clusters, int cluster_size, * Checks how many consecutive unallocated clusters in a given L2 * slice have the same cluster type. */ -static int count_contiguous_clusters_unallocated(int nb_clusters, +static int count_contiguous_clusters_unallocated(BlockDriverState *bs, + int nb_clusters, uint64_t *l2_slice, QCow2ClusterType wanted_type) { @@ -422,7 +423,7 @@ static int count_contiguous_clusters_unallocated(int nb_clusters, wanted_type == QCOW2_CLUSTER_UNALLOCATED); for (i = 0; i < nb_clusters; i++) { uint64_t entry = be64_to_cpu(l2_slice[i]); - QCow2ClusterType type = qcow2_get_cluster_type(entry); + QCow2ClusterType type = qcow2_get_cluster_type(bs, entry); if (type != wanted_type) { break; @@ -595,7 +596,7 @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset, * true */ assert(nb_clusters <= INT_MAX); - type = qcow2_get_cluster_type(*cluster_offset); + type = qcow2_get_cluster_type(bs, *cluster_offset); if (s->qcow_version < 3 && (type == QCOW2_CLUSTER_ZERO_PLAIN || type == QCOW2_CLUSTER_ZERO_ALLOC)) { qcow2_signal_corruption(bs, true, -1, -1, "Zero cluster entry found" @@ -613,14 +614,14 @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset, case QCOW2_CLUSTER_ZERO_PLAIN: case QCOW2_CLUSTER_UNALLOCATED: /* how many empty clusters ? */ - c = count_contiguous_clusters_unallocated(nb_clusters, + c = count_contiguous_clusters_unallocated(bs, nb_clusters, &l2_slice[l2_index], type); *cluster_offset = 0; break; case QCOW2_CLUSTER_ZERO_ALLOC: case QCOW2_CLUSTER_NORMAL: /* how many allocated clusters ? */ - c = count_contiguous_clusters(nb_clusters, s->cluster_size, + c = count_contiguous_clusters(bs, nb_clusters, s->cluster_size, &l2_slice[l2_index], QCOW_OFLAG_ZERO); *cluster_offset &= L2E_OFFSET_MASK; if (offset_into_cluster(s, *cluster_offset)) { @@ -1013,14 +1014,14 @@ void qcow2_alloc_cluster_abort(BlockDriverState *bs, QCowL2Meta *m) * write, but require COW to be performed (this includes yet unallocated space, * which must copy from the backing file) */ -static int count_cow_clusters(BDRVQcow2State *s, int nb_clusters, +static int count_cow_clusters(BlockDriverState *bs, int nb_clusters, uint64_t *l2_slice, int l2_index) { int i; for (i = 0; i < nb_clusters; i++) { uint64_t l2_entry = be64_to_cpu(l2_slice[l2_index + i]); - QCow2ClusterType cluster_type = qcow2_get_cluster_type(l2_entry); + QCow2ClusterType cluster_type = qcow2_get_cluster_type(bs, l2_entry); switch(cluster_type) { case QCOW2_CLUSTER_NORMAL: @@ -1165,7 +1166,7 @@ static int handle_copied(BlockDriverState *bs, uint64_t guest_offset, cluster_offset = be64_to_cpu(l2_slice[l2_index]); /* Check how many clusters are already allocated and don't need COW */ - if (qcow2_get_cluster_type(cluster_offset) == QCOW2_CLUSTER_NORMAL + if (qcow2_get_cluster_type(bs, cluster_offset) == QCOW2_CLUSTER_NORMAL && (cluster_offset & QCOW_OFLAG_COPIED)) { /* If a specific host_offset is required, check it */ @@ -1189,7 +1190,7 @@ static int handle_copied(BlockDriverState *bs, uint64_t guest_offset, /* We keep all QCOW_OFLAG_COPIED clusters */ keep_clusters = - count_contiguous_clusters(nb_clusters, s->cluster_size, + count_contiguous_clusters(bs, nb_clusters, s->cluster_size, &l2_slice[l2_index], QCOW_OFLAG_COPIED | QCOW_OFLAG_ZERO); assert(keep_clusters <= nb_clusters); @@ -1324,7 +1325,7 @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset, if (entry & QCOW_OFLAG_COMPRESSED) { nb_clusters = 1; } else { - nb_clusters = count_cow_clusters(s, nb_clusters, l2_slice, l2_index); + nb_clusters = count_cow_clusters(bs, nb_clusters, l2_slice, l2_index); } /* This function is only called when there were no non-COW clusters, so if @@ -1332,7 +1333,7 @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset, * wrong with our code. */ assert(nb_clusters > 0); - if (qcow2_get_cluster_type(entry) == QCOW2_CLUSTER_ZERO_ALLOC && + if (qcow2_get_cluster_type(bs, entry) == QCOW2_CLUSTER_ZERO_ALLOC && (entry & QCOW_OFLAG_COPIED) && (!*host_offset || start_of_cluster(s, *host_offset) == (entry & L2E_OFFSET_MASK))) @@ -1352,7 +1353,7 @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset, * would be fine, too, but count_cow_clusters() above has limited * nb_clusters already to a range of COW clusters */ preallocated_nb_clusters = - count_contiguous_clusters(nb_clusters, s->cluster_size, + count_contiguous_clusters(bs, nb_clusters, s->cluster_size, &l2_slice[l2_index], QCOW_OFLAG_COPIED); assert(preallocated_nb_clusters > 0); @@ -1616,7 +1617,7 @@ static int discard_in_l2_slice(BlockDriverState *bs, uint64_t offset, * If full_discard is true, the sector should not read back as zeroes, * but rather fall through to the backing file. */ - switch (qcow2_get_cluster_type(old_l2_entry)) { + switch (qcow2_get_cluster_type(bs, old_l2_entry)) { case QCOW2_CLUSTER_UNALLOCATED: if (full_discard || !bs->backing) { continue; @@ -1729,7 +1730,7 @@ static int zero_in_l2_slice(BlockDriverState *bs, uint64_t offset, * Minimize L2 changes if the cluster already reads back as * zeroes with correct allocation. */ - cluster_type = qcow2_get_cluster_type(old_offset); + cluster_type = qcow2_get_cluster_type(bs, old_offset); if (cluster_type == QCOW2_CLUSTER_ZERO_PLAIN || (cluster_type == QCOW2_CLUSTER_ZERO_ALLOC && !unmap)) { continue; @@ -1871,7 +1872,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table, uint64_t l2_entry = be64_to_cpu(l2_slice[j]); int64_t offset = l2_entry & L2E_OFFSET_MASK; QCow2ClusterType cluster_type = - qcow2_get_cluster_type(l2_entry); + qcow2_get_cluster_type(bs, l2_entry); if (cluster_type != QCOW2_CLUSTER_ZERO_PLAIN && cluster_type != QCOW2_CLUSTER_ZERO_ALLOC) { diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 6f13d47..05e7974 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -1157,7 +1157,7 @@ void qcow2_free_any_clusters(BlockDriverState *bs, uint64_t l2_entry, { BDRVQcow2State *s = bs->opaque; - switch (qcow2_get_cluster_type(l2_entry)) { + switch (qcow2_get_cluster_type(bs, l2_entry)) { case QCOW2_CLUSTER_COMPRESSED: { int nb_csectors; @@ -1300,7 +1300,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, entry &= ~QCOW_OFLAG_COPIED; offset = entry & L2E_OFFSET_MASK; - switch (qcow2_get_cluster_type(entry)) { + switch (qcow2_get_cluster_type(bs, entry)) { case QCOW2_CLUSTER_COMPRESSED: nb_csectors = ((entry >> s->csize_shift) & s->csize_mask) + 1; @@ -1582,7 +1582,7 @@ static int check_refcounts_l2(BlockDriverState *bs, BdrvCheckResult *res, for(i = 0; i < s->l2_size; i++) { l2_entry = be64_to_cpu(l2_table[i]); - switch (qcow2_get_cluster_type(l2_entry)) { + switch (qcow2_get_cluster_type(bs, l2_entry)) { case QCOW2_CLUSTER_COMPRESSED: /* Compressed clusters don't have QCOW_OFLAG_COPIED */ if (l2_entry & QCOW_OFLAG_COPIED) { @@ -1633,7 +1633,7 @@ static int check_refcounts_l2(BlockDriverState *bs, BdrvCheckResult *res, /* Correct offsets are cluster aligned */ if (offset_into_cluster(s, offset)) { - if (qcow2_get_cluster_type(l2_entry) == + if (qcow2_get_cluster_type(bs, l2_entry) == QCOW2_CLUSTER_ZERO_ALLOC) { fprintf(stderr, "%s offset=%" PRIx64 ": Preallocated zero " @@ -1868,7 +1868,7 @@ static int check_oflag_copied(BlockDriverState *bs, BdrvCheckResult *res, for (j = 0; j < s->l2_size; j++) { uint64_t l2_entry = be64_to_cpu(l2_table[j]); uint64_t data_offset = l2_entry & L2E_OFFSET_MASK; - QCow2ClusterType cluster_type = qcow2_get_cluster_type(l2_entry); + QCow2ClusterType cluster_type = qcow2_get_cluster_type(bs, l2_entry); if (cluster_type == QCOW2_CLUSTER_NORMAL || cluster_type == QCOW2_CLUSTER_ZERO_ALLOC) { diff --git a/block/qcow2.h b/block/qcow2.h index c63c395..7a34bd0 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -510,7 +510,8 @@ static inline int64_t qcow2_vm_state_offset(BDRVQcow2State *s) return (int64_t)s->l1_vm_state_index << (s->cluster_bits + s->l2_bits); } -static inline QCow2ClusterType qcow2_get_cluster_type(uint64_t l2_entry) +static inline QCow2ClusterType qcow2_get_cluster_type(BlockDriverState *bs, + uint64_t l2_entry) { if (l2_entry & QCOW_OFLAG_COMPRESSED) { return QCOW2_CLUSTER_COMPRESSED; |