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glibc/sysdeps/unix/sysv/linux/sparc/socket-constants-time64.h

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linux: Add fallback for 64-bit time_t SO_{RCV,SND}TIMEO The constant values will be changed for __TIMESIZE=64, so binaries built with 64-bit time support might fail to work properly on old kernels. Both {get,set}sockopt will retry the syscall with the old constant values and the timeout value adjusted when kernel returns ENOTPROTOPT. It also adds an internal only SO_{RCV,SND}TIMEO where COMPAT_SO_{RCV,SND}TIMEO_OLD indicates pre 32-bit time support and COMPAT_SO_{RCV,SND}TIMEO_NEW indicates time64 support. It allows to refer to constant independently of the time_t ABI and kernel version used. Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15 kernel). Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
2020-09-07 17:13:58 +00:00
/* Compat socket constants used in 64-bit compat code.
Copyright (C) 2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _SOCKET_CONSTANTS_TIME64_H
#define _SOCKET_CONSTANTS_TIME64_H
/* The compat code requires the SO_* constants used for both 32 and 64-bit
time_t, however they were only added on v5.1 kernel. */
#define COMPAT_SO_RCVTIMEO_OLD 8192
#define COMPAT_SO_SNDTIMEO_OLD 16384
#define COMPAT_SO_RCVTIMEO_NEW 68
#define COMPAT_SO_SNDTIMEO_NEW 69
linux: Add fallback for 64-bit time_t SO_TIMESTAMP{NS} The recvmsg handling is more complicated because it requires check the returned kernel control message and make some convertions. For !__ASSUME_TIME64_SYSCALLS it converts the first 32-bit time SO_TIMESTAMP or SO_TIMESTAMPNS and appends it to the control buffer if has extra space or returns MSG_CTRUNC otherwise. The 32-bit time field is kept as-is. 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. Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15 kernel). Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
2020-09-07 20:08:46 +00:00
#define COMPAT_SO_TIMESTAMP_OLD 0x001d
#define COMPAT_SO_TIMESTAMPNS_OLD 0x0021
#define COMPAT_SO_TIMESTAMP_NEW 0x0046
#define COMPAT_SO_TIMESTAMPNS_NEW 0x0042
linux: Add fallback for 64-bit time_t SO_{RCV,SND}TIMEO The constant values will be changed for __TIMESIZE=64, so binaries built with 64-bit time support might fail to work properly on old kernels. Both {get,set}sockopt will retry the syscall with the old constant values and the timeout value adjusted when kernel returns ENOTPROTOPT. It also adds an internal only SO_{RCV,SND}TIMEO where COMPAT_SO_{RCV,SND}TIMEO_OLD indicates pre 32-bit time support and COMPAT_SO_{RCV,SND}TIMEO_NEW indicates time64 support. It allows to refer to constant independently of the time_t ABI and kernel version used. Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15 kernel). Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
2020-09-07 17:13:58 +00:00
#endif
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