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[Qemu-block] [PULL 34/37] block: Add blk_get_refcnt()
From: |
Kevin Wolf |
Subject: |
[Qemu-block] [PULL 34/37] block: Add blk_get_refcnt() |
Date: |
Thu, 5 Nov 2015 19:18:02 +0100 |
From: Alberto Garcia <address@hidden>
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>
Message-id: address@hidden
Signed-off-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);
--
1.8.3.1
- [Qemu-block] [PULL 22/37] commit: reopen overlay_bs before base, (continued)
- [Qemu-block] [PULL 22/37] commit: reopen overlay_bs before base, Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 23/37] qemu-iotests: Test the reopening of overlay_bs in 'block-commit', Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 25/37] qemu-img: add check for zero-length job len, Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 24/37] qcow2: avoid misaligned 64bit bswap, Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 30/37] block: test 'blockdev-snapshot' using a file BDS as the overlay, Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 26/37] throttle: Check for pending requests in throttle_group_unregister_bs(), Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 27/37] throttle: Use bs->throttle_state instead of bs->io_limits_enabled, Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 28/37] block: Disallow snapshots if the overlay doesn't support backing files, Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 29/37] block: Remove inner quotation marks in iotest 085, Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 32/37] qemu-iotests: fix -valgrind option for check, Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 34/37] block: Add blk_get_refcnt(),
Kevin Wolf <=
- [Qemu-block] [PULL 31/37] qemu-iotests: fix cleanup of background processes, Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 33/37] mirror: block all operations on the target image during the job, Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 36/37] iotests: Add tests for the x-blockdev-del command, Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 35/37] block: Add 'x-blockdev-del' QMP command, Kevin Wolf, 2015/11/05
- [Qemu-block] [PULL 37/37] qcow2: Fix qcow2_get_cluster_offset() for zero clusters, Kevin Wolf, 2015/11/05
- Re: [Qemu-block] [Qemu-devel] [PULL 00/37] Block layer patches, Peter Maydell, 2015/11/05