Conflicts:
block.h
Signed-off-by: Devin Nakamura <devin...@gmail.com>
---
block.c | 29 +++++++++++++++++++++++++++++
block.h | 2 ++
2 files changed, 31 insertions(+), 0 deletions(-)
diff --git a/block.c b/block.c
index 9530577..d0019c4 100644
--- a/block.c
+++ b/block.c
@@ -3082,3 +3082,32 @@ int bdrv_get_conversion_options(BlockDriverState *bs,
}
return bs->drv->bdrv_get_conversion_options(bs, options);
}
+
+/**
+ * Gets a mapping from an offset in the image to an offset within a file
+ *
+ * All offsets are in bytes. Functions starts its search at offset host_offset
+ * + count (offset within the image, not the file offset)
+ *
+ * @param guest_offset used to calculate starting search location on
+ * function call. On return it is the starting
+ * offset of the mapping in the image.
+ * @param host_offset[out] The starting file offset of the mapping.
+ * @param contiguous_bytes[out] The number of bytes for which this mapping is
+ * contiguous. If 0, there are no more mapppings
in
+ * the image
+ */
+
+int bdrv_get_mapping(BlockDriverState *bs, uint64_t *guest_offset,
+ uint64_t *host_offset, uint64_t *contiguous_bytes)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv) {
+ return -ENOMEDIUM;
+ }
+ if (!drv->bdrv_get_mapping) {
+ return -ENOTSUP;
+ }
+ return drv->bdrv_get_mapping(bs, guest_offset, host_offset,
+ contiguous_bytes);
+}
diff --git a/block.h b/block.h
index 662bae7..3459900 100644
--- a/block.h
+++ b/block.h
@@ -259,6 +259,8 @@ int bdrv_open_conversion_target(BlockDriverState **bs,
BlockDriverState *file,
BlockConversionOptions *drv_options,
QEMUOptionParameter *usr_options,
const char *target_fmt);
+int bdrv_get_mapping(BlockDriverState *bs, uint64_t *guest_offset,
+ uint64_t *host_offset, uint64_t *contiguous_bytes);
typedef enum {
BLKDBG_L1_UPDATE,
--
1.7.6.rc1
