From: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com> Several BlockDriverState fields are not being reinitialized across bdrv_close()/bdrv_open(). Make sure they are reset to their default values.
Signed-off-by: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kw...@redhat.com> --- block.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/block.c b/block.c index cb37086..96f3c3f 100644 --- a/block.c +++ b/block.c @@ -472,10 +472,13 @@ static int bdrv_open_common(BlockDriverState *bs, const char *filename, bs->total_sectors = 0; bs->encrypted = 0; bs->valid_key = 0; + bs->sg = 0; bs->open_flags = flags; + bs->growable = 0; bs->buffer_alignment = 512; pstrcpy(bs->filename, sizeof(bs->filename), filename); + bs->backing_file[0] = '\0'; if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv)) { return -ENOTSUP; @@ -484,8 +487,7 @@ static int bdrv_open_common(BlockDriverState *bs, const char *filename, bs->drv = drv; bs->opaque = g_malloc0(drv->instance_size); - if (flags & BDRV_O_CACHE_WB) - bs->enable_write_cache = 1; + bs->enable_write_cache = !!(flags & BDRV_O_CACHE_WB); /* * Clear flags that are internal to the block layer before opening the -- 1.7.6.4