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block: acquire in bdrv_query_image_info 

NFS calls aio_poll inside bdrv_get_allocated_size.  This requires
acquiring the AioContext.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1450867706-19860-1-git-send-email-pbonzini@redhat.com
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-12-23 11:48:23 +01:00 committed by Max Reitz
parent c78dc18295
commit 1963f8d52e
1 changed files with 7 additions and 2 deletions
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9
block/qapi.c
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@ -211,11 +211,13 @@ void bdrv_query_image_info(BlockDriverState *bs,
Error *err = NULL;
ImageInfo *info;
aio_context_acquire(bdrv_get_aio_context(bs));
size = bdrv_getlength(bs);
if (size < 0) {
error_setg_errno(errp, -size, "Can't get size of device '%s'",
bdrv_get_device_name(bs));
return;
goto out;
}
info = g_new0(ImageInfo, 1);
@ -283,10 +285,13 @@ void bdrv_query_image_info(BlockDriverState *bs,
default:
error_propagate(errp, err);
qapi_free_ImageInfo(info);
return;
goto out;
}
*p_info = info;
out:
aio_context_release(bdrv_get_aio_context(bs));
}
/* @p_info will be set only on success. */