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Date: Thu, 20 Oct 2016 15:55:22 +0200
From: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20161020135522.GC5211@noname.redhat.com>
References: <20161020061301.31372-1-haozhong.zhang@intel.com>
	<20161020143412.5ea6b564@nial.brq.redhat.com>
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In-Reply-To: <20161020143412.5ea6b564@nial.brq.redhat.com>
Subject: Re: [Qemu-devel] [PATCH] hostmem-file: add a property 'notrunc' to
 avoid data corruption
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To: Igor Mammedov <imammedo@redhat.com>
Cc: Haozhong Zhang <haozhong.zhang@intel.com>, qemu-devel@nongnu.org, Eduardo Habkost <ehabkost@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Peter Crosthwaite <crosthwaite.peter@gmail.com>, Richard Henderson <rth@twiddle.net>, Xiao Guangrong <guangrong.xiao@linux.intel.com>, mreitz@redhat.com

Am 20.10.2016 um 14:34 hat Igor Mammedov geschrieben:
> >  #ifdef __linux__
> > +static uint64_t get_file_size(const char *path, Error **errp)
> Maybe QEMU laredy has an utility to do it that could be shared,
> CCing block maintainers.

We have quite a bit of code for determining the right size of a file
(including block devices) on different platforms and devices. See the
.bdrv_getlength implementations in raw-posix.c and raw-win32.c.

However, none of them are made for consumption outside the block layer.

Kevin