* [Qemu-devel] [PATCH 4/6] qed: add qed_bdrv_get_mapping()
@ 2011-09-12 15:00 Devin Nakamura
0 siblings, 0 replies; 2+ messages in thread
From: Devin Nakamura @ 2011-09-12 15:00 UTC (permalink / raw)
To: qemu-devel; +Cc: kwolf, Devin Nakamura
Signed-off-by: Devin Nakamura <devin122@gmail.com>
---
block/qed.c | 29 +++++++++++++++++++++++++++++
1 files changed, 29 insertions(+), 0 deletions(-)
diff --git a/block/qed.c b/block/qed.c
index 93827db..4cde2fd 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -1512,6 +1512,34 @@ static int bdrv_qed_open_conversion_target(BlockDriverState *bs,
return 0;
}
+static int bdrv_qed_get_mapping(BlockDriverState *bs, uint64_t guest_offset,
+ uint64_t *host_offset,
+ uint64_t *contiguous_bytes)
+{
+ BDRVQEDState *s = bs->opaque;
+ size_t l2_size = s->header.cluster_size * s->table_nelems;
+ uint64_t pos = guest_offset;
+ uint64_t offset;
+ size_t len = 0;
+ QEDRequest req = {.l2_table = NULL};
+ int ret;
+
+ if (pos >= s->header.image_size) {
+ *contiguous_bytes = 0;
+ return 0;
+ }
+
+ ret = qed_find_cluster_sync(s, &req, guest_offset, l2_size, &offset, &len);
+ qed_unref_l2_cache_entry(req.l2_table);
+
+ *host_offset = offset;
+ *contiguous_bytes = len;
+ if (ret != QED_CLUSTER_FOUND) {
+ return 1;
+ }
+ return 0;
+}
+
static QEMUOptionParameter qed_create_options[] = {
{
.name = BLOCK_OPT_SIZE,
@@ -1560,6 +1588,7 @@ static BlockDriver bdrv_qed = {
.bdrv_check = bdrv_qed_check,
.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,
};
static void bdrv_qed_init(void)
--
1.7.6.rc1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [Qemu-devel] [PATCH 4/6] qed: add qed_bdrv_get_mapping()
@ 2011-09-12 15:01 Devin Nakamura
0 siblings, 0 replies; 2+ messages in thread
From: Devin Nakamura @ 2011-09-12 15:01 UTC (permalink / raw)
To: qemu-devel; +Cc: kwolf, Devin Nakamura
Signed-off-by: Devin Nakamura <devin122@gmail.com>
---
block/qed.c | 29 +++++++++++++++++++++++++++++
1 files changed, 29 insertions(+), 0 deletions(-)
diff --git a/block/qed.c b/block/qed.c
index 93827db..4cde2fd 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -1512,6 +1512,34 @@ static int bdrv_qed_open_conversion_target(BlockDriverState *bs,
return 0;
}
+static int bdrv_qed_get_mapping(BlockDriverState *bs, uint64_t guest_offset,
+ uint64_t *host_offset,
+ uint64_t *contiguous_bytes)
+{
+ BDRVQEDState *s = bs->opaque;
+ size_t l2_size = s->header.cluster_size * s->table_nelems;
+ uint64_t pos = guest_offset;
+ uint64_t offset;
+ size_t len = 0;
+ QEDRequest req = {.l2_table = NULL};
+ int ret;
+
+ if (pos >= s->header.image_size) {
+ *contiguous_bytes = 0;
+ return 0;
+ }
+
+ ret = qed_find_cluster_sync(s, &req, guest_offset, l2_size, &offset, &len);
+ qed_unref_l2_cache_entry(req.l2_table);
+
+ *host_offset = offset;
+ *contiguous_bytes = len;
+ if (ret != QED_CLUSTER_FOUND) {
+ return 1;
+ }
+ return 0;
+}
+
static QEMUOptionParameter qed_create_options[] = {
{
.name = BLOCK_OPT_SIZE,
@@ -1560,6 +1588,7 @@ static BlockDriver bdrv_qed = {
.bdrv_check = bdrv_qed_check,
.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,
};
static void bdrv_qed_init(void)
--
1.7.6.rc1
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