[Qemu-devel] [PATCH v3 3/6] block: add bdrv_open_conversion_target()

[Devin Nakamura <devin122@gmail.com>]

Conflicts:

	block.h

Signed-off-by: Devin Nakamura <devin122@gmail.com>
---
 block.c |   31 +++++++++++++++++++++++++++++++
 block.h |    3 +++
 2 files changed, 34 insertions(+), 0 deletions(-)

diff --git a/block.c b/block.c
index 5c0ba2d..7d3bc67 100644
--- a/block.c
+++ b/block.c
@@ -3019,6 +3019,37 @@ out:
     return ret;
 }
 
+int bdrv_open_conversion_target(BlockDriverState **bs, BlockDriverState *file,
+                                QEMUOptionParameter *options,
+                                const char *target_fmt)
+{
+    BlockDriver *drv;
+    BlockDriverState *bss;
+
+    drv = bdrv_find_format(target_fmt);
+    if (!drv) {
+        return -ENOENT;
+    }
+
+    if (!drv->bdrv_open_conversion_target) {
+        return -ENOTSUP;
+    }
+
+    *bs = bdrv_new("");
+    bss = *bs;
+    bss->file = file;
+    bss->total_sectors = 0;
+    bss->encrypted = 0;
+    bss->valid_key = 0;
+    bss->open_flags = 0;
+    /* buffer_alignment defaulted to 512, drivers can change this value */
+    bss->buffer_alignment = 512;
+    bss->opaque = qemu_mallocz(drv->instance_size);
+    bss->drv = drv;
+    return drv->bdrv_open_conversion_target(bss, options);
+
+}
+
 int bdrv_get_conversion_options(BlockDriverState *bs,
                                 QEMUOptionParameter **options)
 {
diff --git a/block.h b/block.h
index ca0af6d..145608e 100644
--- a/block.h
+++ b/block.h
@@ -252,6 +252,9 @@ int bdrv_in_use(BlockDriverState *bs);
 
 int bdrv_get_conversion_options(BlockDriverState *bs,
                                 QEMUOptionParameter **options);
+int bdrv_open_conversion_target(BlockDriverState **bs, BlockDriverState *file,
+                                QEMUOptionParameter *options,
+                                const char *target_fmt);
 typedef enum {
     BLKDBG_L1_UPDATE,
 
-- 
1.7.6.rc1