From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: Joseph Myers <joseph@codesourcery.com>
Cc: Florian Weimer <fw@deneb.enyo.de>,
linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org,
linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
v9fs-developer@lists.sourceforge.net, libc-alpha@sourceware.org,
qemu-devel@nongnu.org, ericvh@gmail.com, rminnich@sandia.gov,
lucho@ionkov.net, hpa@zytor.com, arnd@arndb.de
Subject: Re: d_off field in struct dirent and 32-on-64 emulation
Date: Wed, 2 Jan 2019 11:16:37 -0200 [thread overview]
Message-ID: <a5092631-2ddf-1790-5f27-777646ef3d34@linaro.org> (raw)
In-Reply-To: <alpine.DEB.2.21.1812311657050.27287@digraph.polyomino.org.uk>
On 31/12/2018 15:03, Joseph Myers wrote:
> On Fri, 28 Dec 2018, Adhemerval Zanella wrote:
>
>>>> Currently we only have nios2 and csky (unfortunately). But since generic
>>>> definition for off_t and off64_t still assumes non-LFS support, all new
>>>> 32-bits ports potentially might carry the issue.
>>>
>>> For csky, we could still change the type of the non-standard d_off
>>> field to long long int. This way, only telldir would have to fail
>>> when truncation is necessary, as mentioned below:
>>
>> I think it makes no sense to continue making non-LFS as default for
>> newer 32 bits ports, the support will be emulated with LFS syscalls.
>
> Any new 32-bit port that uses 64-bit time_t will also use 64-bit offsets
> (because we don't have any glibc configurations that support the
> combination of 64-bit time with 32-bit offsets, and don't want to add
> them). That should apply for RISC-V 32-bit at least.
>
> I've filed <https://sourceware.org/bugzilla/show_bug.cgi?id=24050> for
> missing overflow checks in telldir when the default off_t is wider than
> long int (currently just applies to x32; not sure why we don't see glibc
> test failures on x32 resulting from the quiet truncation, as the issue is
> certainly there in the source code).
>
What about csky? Should we still make it use 32-bit offsets as default
configuration even when kernel does not support it natively?
next prev parent reply other threads:[~2019-01-02 13:16 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-27 17:18 d_off field in struct dirent and 32-on-64 emulation Florian Weimer
2018-12-27 17:41 ` [Qemu-devel] " Peter Maydell
2018-12-28 0:23 ` Andreas Dilger
2018-12-28 11:18 ` Peter Maydell
2018-12-28 23:16 ` Andreas Dilger
2018-12-29 0:12 ` Peter Maydell
2018-12-29 1:54 ` Matthew Wilcox
2018-12-29 16:49 ` Andy Lutomirski
2018-12-30 13:59 ` Peter Maydell
2018-12-29 2:11 ` Theodore Y. Ts'o
2018-12-29 2:37 ` Dominique Martinet
2018-12-29 3:14 ` Theodore Y. Ts'o
2018-12-29 4:04 ` [V9fs-developer] " Dominique Martinet
[not found] ` <C65D3222-723F-4C0B-AF02-38488C302E84@amacapital.net>
2018-12-27 17:56 ` Florian Weimer
2018-12-27 17:58 ` Adhemerval Zanella
2018-12-27 18:09 ` Florian Weimer
2018-12-28 11:53 ` Adhemerval Zanella
2018-12-28 11:56 ` Florian Weimer
2018-12-28 12:01 ` Florian Weimer
2018-12-28 12:21 ` Adhemerval Zanella
2018-12-31 17:03 ` Joseph Myers
2019-01-02 13:16 ` Adhemerval Zanella [this message]
2018-12-28 2:23 ` Dmitry V. Levin
2018-12-28 7:38 ` Florian Weimer
2018-12-28 15:26 ` Andy Lutomirski
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=a5092631-2ddf-1790-5f27-777646ef3d34@linaro.org \
--to=adhemerval.zanella@linaro.org \
--cc=arnd@arndb.de \
--cc=ericvh@gmail.com \
--cc=fw@deneb.enyo.de \
--cc=hpa@zytor.com \
--cc=joseph@codesourcery.com \
--cc=libc-alpha@sourceware.org \
--cc=linux-api@vger.kernel.org \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lucho@ionkov.net \
--cc=qemu-devel@nongnu.org \
--cc=rminnich@sandia.gov \
--cc=v9fs-developer@lists.sourceforge.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).