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| author | Alberto Garcia | 2015-11-02 15:51:54 +0100 |
|---|---|---|
| committer | Max Reitz | 2015-11-11 16:55:28 +0100 |
| commit | f636ae85f3db8ffb987c79715869dba1b8217e8a (patch) | |
| tree | daeb2608974bf96485f3ec7b0aeda178d701a648 | |
| parent | mirror: block all operations on the target image during the job (diff) | |
| download | qemu-f636ae85f3db8ffb987c79715869dba1b8217e8a.tar.gz qemu-f636ae85f3db8ffb987c79715869dba1b8217e8a.tar.xz qemu-f636ae85f3db8ffb987c79715869dba1b8217e8a.zip | |
block: Add blk_get_refcnt()
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 <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: dfdd8a17dbe3288842840636d2cfe5bb895abcb0.1446475331.git.berto@igalia.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
| -rw-r--r-- | block/block-backend.c | 5 | ||||
| -rw-r--r-- | include/sysemu/block-backend.h | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/block/block-backend.c b/block/block-backend.c index 1ac69824ca..6f9309fef4 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 40e315b5bb..f4a68e291b 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); |