GNU bug report logs - #79139
cp --reflink truncates sparse files on ZFS

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Message #37 received at 79139-done <at> debbugs.gnu.org (full text, mbox):

From: Collin Funk <collin.funk1 <at> gmail.com>
To: Bruno Haible <bruno <at> clisp.org>
Cc: Pádraig Brady <P <at> draigbrady.com>,
 79139-done <at> debbugs.gnu.org, Paul Eggert <eggert <at> cs.ucla.edu>,
 bug-gnulib <at> gnu.org, Leah Neukirchen <leah <at> vuxu.org>
Subject: Re: bug#79139: cp --reflink truncates sparse files on ZFS
Date: Fri, 01 Aug 2025 21:39:44 -0700

[Message part 1 (text/plain, inline)]

Bruno Haible <bruno <at> clisp.org> writes:

>> +      /* Work around glibc bug 33245
>
> It would be good to document the workaround in
> doc/glibc-functions/copy_file_range.texi.

Yep, I noticed as well. Just wanted to make sure I wasn't
misunderstanding the versions before doing it myself. Done with the
attached patch now.

> Collin Funk wrote:
>> Can't we make this condition only occur for glibc 2.41 and glibc 2.42?
>> The issue shouldn't occur before commit
>> 89b53077d2a58f00e7debdfe58afabe953dac60d in glibc (2024-06-25).
>
> Users are supposed to be able to create binaries with an older version of
> glibc, then upgrade their glibc. The binaries should continue to work.

Right. I seemed to have forgot that every program isn't statically
linked to glibc... Thanks.

Collin

[0001-doc-Mention-the-copy_file_range-bug.patch (text/x-patch, attachment)]

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