[Qemu-devel] [PATCH V4 5/7] block: add bdrv_get_mapping()

[Devin Nakamura <devin122@gmail.com>]

Signed-off-by: Devin Nakamura <devin122@gmail.com>
---
 block.c |   15 +++++++++++++++
 block.h |    2 ++
 2 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/block.c b/block.c
index 5ca396b..ed62c4a 100644
--- a/block.c
+++ b/block.c
@@ -3320,3 +3320,18 @@ int bdrv_get_conversion_options(BlockDriverState *bs,
     }
     return bs->drv->bdrv_get_conversion_options(bs, options);
 }
+
+
+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 77e3135..c983d50 100644
--- a/block.h
+++ b/block.h
@@ -264,6 +264,8 @@ int bdrv_open_conversion_target(BlockDriverState **bs, BlockDriverState *file,
                                 QEMUOptionParameter *usr_options,
                                 const char *target_fmt,
                                 bool force);
+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