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[Qemu-devel] [PATCH 4/5] qcow2: lock on prealloc
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH 4/5] qcow2: lock on prealloc |
Date: |
Mon, 7 May 2012 19:55:53 +0200 |
From: Zhi Yong Wu <address@hidden>
preallocate() will be locked. This is required because
qcow2_alloc_cluster_link_l2() assumes that it runs under a lock that it
can drop while COW is being performed.
Signed-off-by: Zhi Yong Wu <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
block/qcow2.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/block/qcow2.c b/block/qcow2.c
index 8c60a6f..ee4678f 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1192,7 +1192,10 @@ static int qcow2_create2(const char *filename, int64_t
total_size,
/* And if we're supposed to preallocate metadata, do that now */
if (prealloc) {
+ BDRVQcowState *s = bs->opaque;
+ qemu_co_mutex_lock(&s->lock);
ret = preallocate(bs);
+ qemu_co_mutex_unlock(&s->lock);
if (ret < 0) {
goto out;
}
--
1.7.6.5
- [Qemu-devel] [PULL 0/5] Block patches for 1.1, Kevin Wolf, 2012/05/07
- [Qemu-devel] [PATCH 1/5] sheepdog: switch to writethrough mode if cluster doesn't support flush, Kevin Wolf, 2012/05/07
- [Qemu-devel] [PATCH 2/5] qcow2: Limit COW to where it's needed, Kevin Wolf, 2012/05/07
- [Qemu-devel] [PATCH 3/5] block: make bdrv_create adopt coroutine, Kevin Wolf, 2012/05/07
- [Qemu-devel] [PATCH 4/5] qcow2: lock on prealloc,
Kevin Wolf <=
- [Qemu-devel] [PATCH 5/5] fdc: simplify media change handling, Kevin Wolf, 2012/05/07
- Re: [Qemu-devel] [PULL 0/5] Block patches for 1.1, Anthony Liguori, 2012/05/08
- [Qemu-devel] [PULL 0/5] Block patches for 1.1, Kevin Wolf, 2012/05/30
- [Qemu-devel] [PATCH 2/5] sheepdog: fix return value of do_load_save_vm_state, Kevin Wolf, 2012/05/30
- [Qemu-devel] [PATCH 3/5] block: prevent snapshot mode $TMPDIR symlink attack, Kevin Wolf, 2012/05/30
- [Qemu-devel] [PATCH 5/5] ahci: SATA FIS is 20 bytes, not 0x20, Kevin Wolf, 2012/05/30
- [Qemu-devel] [PATCH 1/5] virtio: Fix compiler warning for non Linux hosts, Kevin Wolf, 2012/05/30
- [Qemu-devel] [PATCH 4/5] virtio-blk: Fix geometry sector calculation, Kevin Wolf, 2012/05/30
- Re: [Qemu-devel] [PULL 0/5] Block patches for 1.1, Anthony Liguori, 2012/05/30