Signed-off-by: Devin Nakamura <devin...@gmail.com>
---
block/qed.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/block/qed.c b/block/qed.c
index 4cde2fd..341cf9d 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -1540,6 +1540,52 @@ static int bdrv_qed_get_mapping(BlockDriverState *bs,
uint64_t guest_offset,
return 0;
}
+static int bdrv_qed_map(BlockDriverState *bs, uint64_t guest_offset,
+ uint64_t host_offset, uint64_t contiguous_bytes)
+{
+ BDRVQEDState* s = bs->opaque;
+ if(guest_offset != qed_start_of_cluster(s, guest_offset)){
+ return -EINVAL;
+ }
+
+ if(contiguous_bytes % s->header.cluster_size != 0){
+ return -EINVAL;
+ }
+
+ while(contiguous_bytes > 0){
+ uint64_t l1_index, l2_index, first_l2;
+ int ret;
+ QEDRequest req = {.l2_table = NULL};
+
+
+ l1_index = qed_l1_index(s, guest_offset);
+ l2_index = qed_l2_index(s, guest_offset);
+ first_l2 = l2_index;
+ if(!s->l1_table->offsets[l1_index]){
+ CachedL2Table * table = qed_new_l2_table(s);
+ s->l1_table->offsets[l1_index] = table->offset;
+ qed_write_l1_table_sync(s, l1_index, 1);
+ qed_commit_l2_cache_entry(&s->l2_cache, table);
+ }
+
+ ret = qed_read_l2_table_sync(s, &req, s->l1_table->offsets[l1_index]);
+ if(ret){
+ return ret;
+ }
+
+ for(;l2_index < s->table_nelems && contiguous_bytes > 0; l2_index++){
+ req.l2_table->table->offsets[l2_index] = host_offset;
+ host_offset += s->header.cluster_size;
+ contiguous_bytes -= s->header.cluster_size;
+ }
+
+ ret = qed_write_l2_table_sync(s, &req, 0, s->table_nelems, true);
+ qed_unref_l2_cache_entry(req.l2_table);
+
+ }
+ return 0;
+}
+
static QEMUOptionParameter qed_create_options[] = {
{
.name = BLOCK_OPT_SIZE,
@@ -1589,6 +1635,7 @@ static BlockDriver bdrv_qed = {
.bdrv_get_conversion_options = bdrv_qed_get_conversion_options,
.bdrv_open_conversion_target = bdrv_qed_open_conversion_target,
.bdrv_get_mapping = bdrv_qed_get_mapping,
+ .bdrv_map = bdrv_qed_map,
};
static void bdrv_qed_init(void)
--
1.7.6.rc1
