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Re: [Qemu-devel] [Qemu-block] [PATCH v2 0/3] block: Warn about usage of

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [Qemu-block] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols
Date: Thu, 07 May 2015 14:47:15 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0

On 07/05/2015 14:29, Kevin Wolf wrote:
> > No, it shouldn't indeed.
> > 
> > Could alloc_clusters_noref do bdrv_truncate and return ENOSPC if it
> > fails?  That's how for example qcow and vhdx work.  vdi has the same
> > problem.
> If you want NBD to return -ENOSPC for writes after EOF, change the
> nbd block driver to do just that. There's no reason to add additional
> overhead to qcow2 (even over raw-posix) for that.

Does ENOSPC over LVM (dm-linear) work at all, and who generates the
ENOSPC there?


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