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Re: [Qemu-devel] [PATCH v2 3/4] raw-posix: Fix try_seek_hole()'s handlin


From: Eric Blake
Subject: Re: [Qemu-devel] [PATCH v2 3/4] raw-posix: Fix try_seek_hole()'s handling of SEEK_DATA failure
Date: Thu, 13 Nov 2014 08:49:18 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0

On 11/13/2014 08:44 AM, Max Reitz wrote:

>> (By the way, I really wish Solaris had implemented a variant that
>> queried, but did NOT change the file offset - maybe Linux can add that
>> as an extension, and give it sane semantics of not special casing
>> trailing holes...)
> 
> Are you asking for fiemap? :-P

Not that bulky; maybe just two more constants SEEK_PEEK_HOLE and
SEEK_PEEK_DATA, which return the same values as their non-peek
counterparts but without modifying the fd offset.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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