qcow2: Avoid making the L1 table too big
We refuse to open images whose L1 table we deem "too big". Consequently, we should not produce such images ourselves. Cc: qemu-stable@nongnu.org Signed-off-by: NMax Reitz <mreitz@redhat.com> Message-id: 20160615153630.2116-3-mreitz@redhat.com Reviewed-by: NEric Blake <eblake@redhat.com> [mreitz: Added QEMU_BUILD_BUG_ON()] Signed-off-by: NMax Reitz <mreitz@redhat.com>
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