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[Qemu-block] [PATCH v4 2/4] block: Add blk_get_refcnt()
From: |
Alberto Garcia |
Subject: |
[Qemu-block] [PATCH v4 2/4] block: Add blk_get_refcnt() |
Date: |
Mon, 2 Nov 2015 16:51:54 +0200 |
This function returns the reference count of a given BlockBackend.
For convenience, it returns 0 if the BlockBackend pointer is NULL.
Signed-off-by: Alberto Garcia <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
---
block/block-backend.c | 5 +++++
include/sysemu/block-backend.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/block/block-backend.c b/block/block-backend.c
index 1ac6982..6f9309f 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -189,6 +189,11 @@ static void drive_info_del(DriveInfo *dinfo)
g_free(dinfo);
}
+int blk_get_refcnt(BlockBackend *blk)
+{
+ return blk ? blk->refcnt : 0;
+}
+
/*
* Increment @blk's reference count.
* @blk must not be null.
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index 40e315b..f4a68e2 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -65,6 +65,7 @@ BlockBackend *blk_new_with_bs(const char *name, Error **errp);
BlockBackend *blk_new_open(const char *name, const char *filename,
const char *reference, QDict *options, int flags,
Error **errp);
+int blk_get_refcnt(BlockBackend *blk);
void blk_ref(BlockBackend *blk);
void blk_unref(BlockBackend *blk);
const char *blk_name(BlockBackend *blk);
--
2.6.1