[Qemu-devel] [PATCH 5/5] include/block/block_int: Document protocol related functions

[Fabiano Rosas <farosas@linux.vnet.ibm.com>]

Clarify that for protocols the brdv_file_open function is used instead
of bdrv_open and that protocol_name is expected to be set.

Signed-off-by: Fabiano Rosas <farosas@linux.vnet.ibm.com>
---
 include/block/block_int.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/block/block_int.h b/include/block/block_int.h
index 64a5700f2b..d5e864c2dc 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -126,6 +126,8 @@ struct BlockDriver {
 
     int (*bdrv_open)(BlockDriverState *bs, QDict *options, int flags,
                      Error **errp);
+
+    /* Protocol drivers should implement this instead of bdrv_open */
     int (*bdrv_file_open)(BlockDriverState *bs, QDict *options, int flags,
                           Error **errp);
     void (*bdrv_close)(BlockDriverState *bs);
@@ -247,6 +249,10 @@ struct BlockDriver {
      */
     int coroutine_fn (*bdrv_co_flush_to_os)(BlockDriverState *bs);
 
+    /*
+     * Drivers that set this field should also provide a
+     * bdrv_file_open implementation
+     */
     const char *protocol_name;
     int (*bdrv_truncate)(BlockDriverState *bs, int64_t offset,
                          PreallocMode prealloc, Error **errp);
-- 
2.13.6