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[Qemu-devel] [RFC 09/24] qed: add qed_bdrv_get_mapping()
From: |
Devin Nakamura |
Subject: |
[Qemu-devel] [RFC 09/24] qed: add qed_bdrv_get_mapping() |
Date: |
Fri, 29 Jul 2011 00:49:39 -0400 |
Fuction to get drive mapping from qed images
Signed-off-by: Devin Nakamura <address@hidden>
---
block/qed.c | 32 ++++++++++++++++++++++++++++++++
1 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/block/qed.c b/block/qed.c
index 00cf895..dadb7f8 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -1451,6 +1451,37 @@ static int bdrv_qed_check(BlockDriverState *bs,
BdrvCheckResult *result)
return qed_check(s, result, false);
}
+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 + *contiguous_bytes;
+ uint64_t offset = pos;
+ size_t len = 0;
+ QEDRequest req = {.l2_table = NULL};
+ int ret;
+
+ if (pos >= s->header.image_size) {
+ *contiguous_bytes = 0;
+ return 0;
+ }
+
+ do {
+ pos += len;
+ ret = qed_find_cluster_sync(s, &req, pos, l2_size, &offset, &len);
+ } while (ret != QED_CLUSTER_FOUND && pos < s->header.image_size);
+ *guest_offset = pos;
+ *host_offset = offset;
+ if (pos >= s->header.image_size) {
+ *contiguous_bytes = 0;
+ } else {
+ *contiguous_bytes = len;
+ }
+ return 0;
+}
+
static QEMUOptionParameter qed_create_options[] = {
{
.name = BLOCK_OPT_SIZE,
@@ -1497,6 +1528,7 @@ static BlockDriver bdrv_qed = {
.bdrv_get_info = bdrv_qed_get_info,
.bdrv_change_backing_file = bdrv_qed_change_backing_file,
.bdrv_check = bdrv_qed_check,
+ .bdrv_get_mapping = bdrv_qed_get_mapping,
};
static void bdrv_qed_init(void)
--
1.7.6.rc1
- [Qemu-devel] [RFC 02/24] block: add bdrv_get_conversion_options(), (continued)
- [Qemu-devel] [RFC 02/24] block: add bdrv_get_conversion_options(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 01/24] block: add block conversion api, Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 03/24] block: add bdrv_open_conversion_target(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 04/24] block: add bdrv_get_mapping(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 05/24] block: add bdrv_map(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 06/24] block: add bdrv_copy_header(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 07/24] qed: make qed_alloc_clusters round up offset to nearest cluster, Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 08/24] qed: add qed_find_cluster_sync(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 10/24] qed: add qed_bdrv_map(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 11/24] qed: add open_conversion_target(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 09/24] qed: add qed_bdrv_get_mapping(),
Devin Nakamura <=
- [Qemu-devel] [RFC 13/24] qed: add bdrv_qed_get_conversion_options(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 12/24] qed: add bdrv_qed_copy_header(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 15/24] qcow2: split up the creation of new refcount table from the act of checking it, Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 14/24] qcow2: fix typo in documentation for qcow2_get_cluster_offset(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 16/24] qcow2: add qcow2_drop_leaked_clusters(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 17/24] qcow2: add qcow2_get_mapping, Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 18/24] qcow2: add qcow2_map, Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 19/24] qcow2: add qcow2_copy_header(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 21/24] qcow2: add qcow2_open_conversion_target(), Devin Nakamura, 2011/07/29
- [Qemu-devel] [RFC 23/24] qemu-io: add setmap command, Devin Nakamura, 2011/07/29