From: Florian Weimer <fweimer@redhat.com>
To: Adhemerval Zanella via Libc-alpha <libc-alpha@sourceware.org>
Subject: Re: [PATCH v2 06/25] linux: Add fallback for 64-bit time_t SO_TIMESTAMP{NS}
Date: Thu, 20 May 2021 08:50:20 +0200 [thread overview]
Message-ID: <87v97dsxub.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <20210518205613.1487824-7-adhemerval.zanella@linaro.org> (Adhemerval Zanella via Libc-alpha's message of "Tue, 18 May 2021 17:55:54 -0300")
* Adhemerval Zanella via Libc-alpha:
> Calls with __TIMESIZE=32 will see the converted 64-bit time control
> messages as spurious control message of unknown type. Calls with
> __TIMESIZE=64 running on pre-time64 kernels will see the original
> message as a spurious control ones of unknown typ while running on
> kernel with native 64-bit time support will only see the time64 version
> of the control message.
Does the mirror what the kernel does? I have some concerns about
backwards compatibility here, but if the kernel does it as well, that is
likely a non-issue.
I think this kind of emulation goes against our general guidance of not
emulating system calls in userspace. It would probably be necessary if
we switch an existing 32-bit target to 64-bit time_t by default, though.
Thanks,
Florian
next prev parent reply other threads:[~2021-05-20 6:50 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-18 20:55 [PATCH v2 00/25] Add 64 bit time support on legacy ABIs Adhemerval Zanella
2021-05-18 20:55 ` [PATCH v2 01/25] linux: mips: Split libpthread.abilist in n32 and n64 Adhemerval Zanella
2021-05-19 8:24 ` Lukasz Majewski
2021-05-20 6:38 ` Florian Weimer
2021-05-20 10:43 ` Adhemerval Zanella
2021-06-04 19:29 ` Carlos O'Donell
2021-05-18 20:55 ` [PATCH v2 02/25] linux: mips: Split librt.abilist " Adhemerval Zanella
2021-05-19 8:25 ` Lukasz Majewski
2021-06-04 19:29 ` Carlos O'Donell
2021-05-18 20:55 ` [PATCH v2 03/25] linux: mips: Split libanl.abilist " Adhemerval Zanella
2021-05-19 8:25 ` Lukasz Majewski
2021-06-04 19:30 ` Carlos O'Donell
2021-05-18 20:55 ` [PATCH v2 04/25] linux: s390: Add libanl.abilist in s390 and s390x Adhemerval Zanella
2021-05-19 8:26 ` Lukasz Majewski
2021-06-04 19:30 ` Carlos O'Donell
2021-05-18 20:55 ` [PATCH v2 05/25] linux: Add fallback for 64-bit time_t SO_{RCV, SND}TIMEO Adhemerval Zanella
2021-05-19 8:36 ` [PATCH v2 05/25] linux: Add fallback for 64-bit time_t SO_{RCV,SND}TIMEO Lukasz Majewski
2021-05-20 6:44 ` [PATCH v2 05/25] linux: Add fallback for 64-bit time_t SO_{RCV, SND}TIMEO Florian Weimer
2021-05-20 18:01 ` Adhemerval Zanella
2021-05-21 18:37 ` Florian Weimer
2021-05-21 19:17 ` Adhemerval Zanella
2021-06-04 19:30 ` [PATCH v2 05/25] linux: Add fallback for 64-bit time_t SO_{RCV,SND}TIMEO Carlos O'Donell
2021-06-07 17:52 ` Adhemerval Zanella
2021-05-18 20:55 ` [PATCH v2 06/25] linux: Add fallback for 64-bit time_t SO_TIMESTAMP{NS} Adhemerval Zanella
2021-05-19 8:50 ` Lukasz Majewski
2021-05-20 6:50 ` Florian Weimer [this message]
2021-05-20 18:46 ` Adhemerval Zanella
2021-05-21 18:38 ` Florian Weimer
2021-05-21 19:02 ` Adhemerval Zanella
2021-06-04 19:30 ` Carlos O'Donell
2021-05-18 20:55 ` [PATCH v2 07/25] linux: Add recvvmsg " Adhemerval Zanella
2021-05-19 9:02 ` Lukasz Majewski
2021-06-04 19:30 ` Carlos O'Donell
2021-05-18 20:55 ` [PATCH v2 08/25] y2038: Add __USE_TIME_BITS64 support for time_t Adhemerval Zanella
2021-05-19 9:02 ` Lukasz Majewski
2021-06-04 19:30 ` Carlos O'Donell
2021-05-18 20:55 ` [PATCH v2 09/25] y2038: Add __USE_TIME_BITS64 support for struct timeval Adhemerval Zanella
2021-05-19 9:03 ` Lukasz Majewski
2021-06-04 19:31 ` Carlos O'Donell
2021-05-18 20:55 ` [PATCH v2 10/25] y2038: Add __USE_TIME_BITS64 support for struct timespec Adhemerval Zanella
2021-05-19 9:03 ` Lukasz Majewski
2021-06-04 19:31 ` Carlos O'Donell
2021-05-18 20:55 ` [PATCH v2 11/25] y2038: Add __USE_TIME_BITS64 support for struct utimbuf Adhemerval Zanella
2021-05-19 9:04 ` Lukasz Majewski
2021-06-04 19:31 ` Carlos O'Donell
2021-05-18 20:56 ` [PATCH v2 12/25] y2038: linux: Add __USE_TIME_BITS64 support for struct timex Adhemerval Zanella
2021-05-19 9:04 ` Lukasz Majewski
2021-06-04 19:31 ` Carlos O'Donell
2021-05-18 20:56 ` [PATCH v2 13/25] y2038: Use a common definition for stat Adhemerval Zanella
2021-06-04 19:37 ` Carlos O'Donell
2021-06-07 18:07 ` Adhemerval Zanella
2021-05-18 20:56 ` [PATCH v2 14/25] y2038: Use a common definition for msqid_ds Adhemerval Zanella
2021-06-04 19:38 ` Carlos O'Donell
2021-06-07 18:29 ` Adhemerval Zanella
2021-05-18 20:56 ` [PATCH v2 15/25] y2038: Use a common definition for semid_ds Adhemerval Zanella
2021-05-19 9:09 ` Lukasz Majewski
2021-06-04 19:38 ` Carlos O'Donell
2021-06-07 18:46 ` Adhemerval Zanella
2021-05-18 20:56 ` [PATCH v2 16/25] y2038: Use a common definition for shmid_ds Adhemerval Zanella
2021-05-19 9:09 ` Lukasz Majewski
2021-06-04 19:38 ` Carlos O'Donell
2021-05-18 20:56 ` [PATCH v2 17/25] y2038: Add __USE_TIME_BITS64 support for socket-constants.h Adhemerval Zanella
2021-05-19 9:13 ` Lukasz Majewski
2021-06-04 19:38 ` Carlos O'Donell
2021-05-18 20:56 ` [PATCH v2 18/25] time: Add 64 bit time support for getdate Adhemerval Zanella
2021-05-19 9:15 ` Lukasz Majewski
2021-06-04 19:38 ` Carlos O'Donell
2021-05-18 20:56 ` [PATCH v2 19/25] y2038: Add support for 64 bit time on legacy ABIs Adhemerval Zanella
2021-05-19 9:18 ` Lukasz Majewski
2021-05-20 6:58 ` Florian Weimer
2021-05-20 10:37 ` Adhemerval Zanella
2021-06-04 19:38 ` Carlos O'Donell
2021-05-18 20:56 ` [PATCH v2 20/25] posix: Add glob64 with 64 bit time_t support Adhemerval Zanella
2021-05-19 10:44 ` Lukasz Majewski
2021-06-04 19:39 ` Carlos O'Donell
2021-06-07 18:52 ` Adhemerval Zanella
2021-05-18 20:56 ` [PATCH v2 21/25] io: Add fts64 " Adhemerval Zanella
2021-05-19 10:50 ` Lukasz Majewski
2021-06-04 19:39 ` Carlos O'Donell
2021-05-18 20:56 ` [PATCH v2 22/25] io: Add ftw64 " Adhemerval Zanella
2021-05-19 10:57 ` Lukasz Majewski
2021-06-04 19:39 ` Carlos O'Donell
2021-05-18 20:56 ` [PATCH v2 23/25] libsupport: Add 64 bit time_t support for time functions Adhemerval Zanella
2021-05-19 11:00 ` Lukasz Majewski
2021-06-04 19:39 ` Carlos O'Donell
2021-05-18 20:56 ` [PATCH v2 24/25] libsupport: Add 64 bit time_t support for stat functions Adhemerval Zanella
2021-05-19 11:04 ` Lukasz Majewski
2021-06-04 19:39 ` Carlos O'Donell
2021-05-18 20:56 ` [PATCH v2 25/25] y2038: Add test coverage Adhemerval Zanella
2021-05-19 11:08 ` Lukasz Majewski
2021-06-04 19:39 ` Carlos O'Donell
2021-06-04 19:29 ` [PATCH v2 00/25] Add 64 bit time support on legacy ABIs Carlos O'Donell
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