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Thu, 12 Apr 2018 10:21:26 -0400 Received: from mout.kundenserver.de ([212.227.17.24]:54153 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752752AbeDLOVY (ORCPT ); Thu, 12 Apr 2018 10:21:24 -0400 From: Arnd Bergmann To: y2038@lists.linaro.org, linux-kernel@vger.kernel.org Cc: Arnd Bergmann , linux-api@vger.kernel.org, linux-arch@vger.kernel.org, libc-alpha@sourceware.org, tglx@linutronix.de, deepa.kernel@gmail.com, viro@zeniv.linux.org.uk, ebiederm@xmission.com, albert.aribaud@3adev.fr, linux-s390@vger.kernel.org, schwidefsky@de.ibm.com, x86@kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, linux-mips@linux-mips.org, jhogan@kernel.org, ralf@linux-mips.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org Subject: [PATCH v2 00/13] y2038: convert IPC syscalls Date: Thu, 12 Apr 2018 16:20:11 +0200 Message-Id: <20180412142024.853892-1-arnd@arndb.de> X-Mailer: git-send-email 2.9.0 X-Provags-ID: V03:K1:Mg/M8x+JVvInDa8EBUNO2LQX+70ry2NtvrnDqT9eNu9FMYKHKv1 cN8vco/g2edu4PhU0AvRhzolc+7GvZxWG6b3Ut+LT70Q5Tk37eNmIOW3h+ORRdn4VA4A+4v 5PZOvSVzeWxk1bRdnelvrxsBNeErv/uu5YBNYXECu3hM3sLtTR2SPJplCDFrsiHf519jHcU sTHA1OECYXHE9zJuEzP+Q== X-UI-Out-Filterresults: notjunk:1;V01:K0:sJ1A2o/Hw7E=:IILjFGvmhIGKlhLUB4Olv3 YP2gIrxqaYeGE3Pa5Ag/6XVBkjUz0OCLiAaWRHnV2uPcktOrRfwUCfGL1woDCqV5G/GKXffPg q/0IHpihr2W4gbT0Vb0NyM5yUtqH/ae09qWKokAkHPiAPgXe4FTqX67QTxpoRVrKOFffuZpHA 4auxmExrmRwP/ReSIezURgWaCcw8A/qEhkGCgI7hw1TLI6333Nyx0d102SkrEn0q77if9J7+V I5WAlCqZ2mTSR/XrsFX2Bzcz8SXLi/bZIcHC7yJXrZ1x/x/M1a0IzyVuMGMSABjaFvwEoiBgD gvo++P6L0TEyFrZRFG65T3+iBfCHeGwXIYCKxIAFLrxUj503Nr4dza5pllpOktMSWTJDeMUfS bY8DtOU/pRbmW5dolo9eO50LWJJwWsqXQbcNQxrIda4r5QxWiGmB6EjXoM1KTxepJoRvuw2Sf BHwGMXVnBcl0yUkHlt/s+pRooPpCamyKY3Y5NRgTR6xZl4o1THLZO81ENWUP+qrJlW8HQUO/y ohdsB0QM8kXIssM7YdUEII4iLQG7duFUXDt7sBm1hEcWARxw+PuNXfT0nn5azPLE1IQkVM344 uzBfcUqv7y2yw7ZwSahR1szzeMC8x0N2sBNOCVNjCfkBjwghnqwt1d6iM5ZSynmNT0iuHMv37 hrEhARPlYPtlZR5bA5Wxj2vQgj2JKDF9frDNp2tAz2GNxqx4pa0m7/dKWAPRZDZAo4ub99Go+ J2dTxOsAksA23FdNltQ9N3mUvpZ/XlZHo8jq0Q== Sender: linux-api-owner@vger.kernel.org X-Mailing-List: linux-api@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: This is an update of a series I posted a long time ago [1], updating the IPC subsystem to pass down 64-bit time stamps to user space. In particular, for sys_msgctl, sys_semctl and sys_shmctl, I do not introduce a completely new set of replacement system calls, but instead extend the existing ones to return data in the reserved fields of the normal data structure. This should be completely transparent to any existing user space, and only after the 32-bit time_t wraps, it will make a difference in the returned data. libc implementations will consequently have to provide their own data structures when they move to 64-bit time_t, and convert the structures in user space from the ones returned by the kernel. There are three cases here: - little-endian architectures (except powerpc and mips) can use the normal layout and just cast the data structure to the user space type that contains 64-bit numbers. - parisc and sparc can do the same thing with big-endian user space - little-endian powerpc and most big-endian architectures have to flip the upper and lower 32-bit halves of the time_t value in memory, but can otherwise keep using the normal layout - mips and big-endian xtensa need to be more careful because they are not consistent in their definitions, and they have to provide custom libc implementations for the system calls to use 64-bit time_t. Changes to the previous version include - Rebased to the latest kernel (4.17-rc) - Dropped changes for removed architectures - Simplified the IPC code changes, based on prior work from both Deepa and Eric - Fixed a few bugs that I found during rebasing, in parcular the sparc version was incorrect. If everyone agrees with the series, I'd like to have it merged through the tip tree once Deepa's earlier syscall series in there (I have both in my y2038 tree [2]). Arnd [1] https://lkml.org/lkml/2015/5/20/605 [2] git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git y2038-next Arnd Bergmann (13): y2038: asm-generic: extend sysvipc data structures y2038: alpha: remove unneeded ipc uapi header files y2038: ia64: remove unneeded ipc uapi header files y2038: s390: remove unneeded ipc uapi header files y2038: arm64: extend sysvipc compat data structures y2038: mips: extend sysvipc data structures y2038: x86: extend sysvipc data structures y2038: parisc: extend sysvipc data structures y2038: sparc: extend sysvipc data structures y2038: powerpc: extend sysvipc data structures y2038: xtensa: extend sysvipc data structures y2038: ipc: use ktime_get_real_seconds consistently y2038: ipc: report long times to user space Cc: linux-api@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: libc-alpha@sourceware.org Cc: tglx@linutronix.de Cc: deepa.kernel@gmail.com Cc: viro@zeniv.linux.org.uk Cc: ebiederm@xmission.com Cc: albert.aribaud@3adev.fr Cc: linux-s390@vger.kernel.org Cc: schwidefsky@de.ibm.com Cc: x86@kernel.org Cc: catalin.marinas@arm.com Cc: will.deacon@arm.com Cc: linux-mips@linux-mips.org Cc: jhogan@kernel.org Cc: ralf@linux-mips.org Cc: linuxppc-dev@lists.ozlabs.org Cc: sparclinux@vger.kernel.org arch/alpha/include/asm/Kbuild | 4 +++ arch/alpha/include/uapi/asm/ipcbuf.h | 2 -- arch/alpha/include/uapi/asm/msgbuf.h | 28 ----------------- arch/alpha/include/uapi/asm/sembuf.h | 23 -------------- arch/alpha/include/uapi/asm/shmbuf.h | 39 ----------------------- arch/arm64/include/asm/compat.h | 32 +++++++++---------- arch/ia64/include/asm/Kbuild | 4 +++ arch/ia64/include/uapi/asm/ipcbuf.h | 2 -- arch/ia64/include/uapi/asm/msgbuf.h | 28 ----------------- arch/ia64/include/uapi/asm/sembuf.h | 23 -------------- arch/ia64/include/uapi/asm/shmbuf.h | 39 ----------------------- arch/mips/include/asm/compat.h | 38 ++++++++++++----------- arch/mips/include/uapi/asm/msgbuf.h | 57 ++++++++++++++++++++++------------ arch/mips/include/uapi/asm/sembuf.h | 15 +++++++-- arch/mips/include/uapi/asm/shmbuf.h | 23 ++++++++++++-- arch/parisc/include/asm/compat.h | 32 +++++++++---------- arch/parisc/include/uapi/asm/msgbuf.h | 33 ++++++++++---------- arch/parisc/include/uapi/asm/sembuf.h | 16 +++++----- arch/parisc/include/uapi/asm/shmbuf.h | 19 +++++------- arch/powerpc/include/asm/compat.h | 32 +++++++++---------- arch/powerpc/include/uapi/asm/msgbuf.h | 18 +++++------ arch/powerpc/include/uapi/asm/sembuf.h | 14 ++++----- arch/powerpc/include/uapi/asm/shmbuf.h | 19 +++++------- arch/s390/include/asm/Kbuild | 3 ++ arch/s390/include/asm/compat.h | 32 +++++++++---------- arch/s390/include/uapi/asm/msgbuf.h | 38 ----------------------- arch/s390/include/uapi/asm/sembuf.h | 30 ------------------ arch/s390/include/uapi/asm/shmbuf.h | 49 ----------------------------- arch/sparc/include/asm/compat.h | 32 +++++++++---------- arch/sparc/include/uapi/asm/msgbuf.h | 22 ++++++------- arch/sparc/include/uapi/asm/sembuf.h | 16 +++++----- arch/sparc/include/uapi/asm/shmbuf.h | 21 ++++++------- arch/x86/include/asm/compat.h | 32 +++++++++---------- arch/x86/include/uapi/asm/Kbuild | 5 ++- arch/x86/include/uapi/asm/msgbuf.h | 1 - arch/x86/include/uapi/asm/sembuf.h | 11 ++++++- arch/x86/include/uapi/asm/shmbuf.h | 1 - arch/xtensa/include/uapi/asm/msgbuf.h | 25 +++++++-------- arch/xtensa/include/uapi/asm/sembuf.h | 17 +++++----- arch/xtensa/include/uapi/asm/shmbuf.h | 37 +++++----------------- include/uapi/asm-generic/msgbuf.h | 17 +++++----- include/uapi/asm-generic/sembuf.h | 26 ++++++++++------ include/uapi/asm-generic/shmbuf.h | 17 +++++----- ipc/msg.c | 20 ++++++++---- ipc/sem.c | 20 ++++++++---- ipc/shm.c | 14 +++++++-- 46 files changed, 393 insertions(+), 633 deletions(-) delete mode 100644 arch/alpha/include/uapi/asm/ipcbuf.h delete mode 100644 arch/alpha/include/uapi/asm/msgbuf.h delete mode 100644 arch/alpha/include/uapi/asm/sembuf.h delete mode 100644 arch/alpha/include/uapi/asm/shmbuf.h delete mode 100644 arch/ia64/include/uapi/asm/ipcbuf.h delete mode 100644 arch/ia64/include/uapi/asm/msgbuf.h delete mode 100644 arch/ia64/include/uapi/asm/sembuf.h delete mode 100644 arch/ia64/include/uapi/asm/shmbuf.h delete mode 100644 arch/s390/include/uapi/asm/msgbuf.h delete mode 100644 arch/s390/include/uapi/asm/sembuf.h delete mode 100644 arch/s390/include/uapi/asm/shmbuf.h delete mode 100644 arch/x86/include/uapi/asm/msgbuf.h delete mode 100644 arch/x86/include/uapi/asm/shmbuf.h -- 2.9.0 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Date: Thu, 12 Apr 2018 14:20:11 +0000 Subject: [PATCH v2 00/13] y2038: convert IPC syscalls Message-Id: <20180412142024.853892-1-arnd@arndb.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: y2038@lists.linaro.org, linux-kernel@vger.kernel.org Cc: Arnd Bergmann , linux-api@vger.kernel.org, linux-arch@vger.kernel.org, libc-alpha@sourceware.org, tglx@linutronix.de, deepa.kernel@gmail.com, viro@zeniv.linux.org.uk, ebiederm@xmission.com, albert.aribaud@3adev.fr, linux-s390@vger.kernel.org, schwidefsky@de.ibm.com, x86@kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, linux-mips@linux-mips.org, jhogan@kernel.org, ralf@linux-mips.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org This is an update of a series I posted a long time ago [1], updating the IPC subsystem to pass down 64-bit time stamps to user space. In particular, for sys_msgctl, sys_semctl and sys_shmctl, I do not introduce a completely new set of replacement system calls, but instead extend the existing ones to return data in the reserved fields of the normal data structure. This should be completely transparent to any existing user space, and only after the 32-bit time_t wraps, it will make a difference in the returned data. libc implementations will consequently have to provide their own data structures when they move to 64-bit time_t, and convert the structures in user space from the ones returned by the kernel. There are three cases here: - little-endian architectures (except powerpc and mips) can use the normal layout and just cast the data structure to the user space type that contains 64-bit numbers. - parisc and sparc can do the same thing with big-endian user space - little-endian powerpc and most big-endian architectures have to flip the upper and lower 32-bit halves of the time_t value in memory, but can otherwise keep using the normal layout - mips and big-endian xtensa need to be more careful because they are not consistent in their definitions, and they have to provide custom libc implementations for the system calls to use 64-bit time_t. Changes to the previous version include - Rebased to the latest kernel (4.17-rc) - Dropped changes for removed architectures - Simplified the IPC code changes, based on prior work from both Deepa and Eric - Fixed a few bugs that I found during rebasing, in parcular the sparc version was incorrect. If everyone agrees with the series, I'd like to have it merged through the tip tree once Deepa's earlier syscall series in there (I have both in my y2038 tree [2]). Arnd [1] https://lkml.org/lkml/2015/5/20/605 [2] git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git y2038-next Arnd Bergmann (13): y2038: asm-generic: extend sysvipc data structures y2038: alpha: remove unneeded ipc uapi header files y2038: ia64: remove unneeded ipc uapi header files y2038: s390: remove unneeded ipc uapi header files y2038: arm64: extend sysvipc compat data structures y2038: mips: extend sysvipc data structures y2038: x86: extend sysvipc data structures y2038: parisc: extend sysvipc data structures y2038: sparc: extend sysvipc data structures y2038: powerpc: extend sysvipc data structures y2038: xtensa: extend sysvipc data structures y2038: ipc: use ktime_get_real_seconds consistently y2038: ipc: report long times to user space Cc: linux-api@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: libc-alpha@sourceware.org Cc: tglx@linutronix.de Cc: deepa.kernel@gmail.com Cc: viro@zeniv.linux.org.uk Cc: ebiederm@xmission.com Cc: albert.aribaud@3adev.fr Cc: linux-s390@vger.kernel.org Cc: schwidefsky@de.ibm.com Cc: x86@kernel.org Cc: catalin.marinas@arm.com Cc: will.deacon@arm.com Cc: linux-mips@linux-mips.org Cc: jhogan@kernel.org Cc: ralf@linux-mips.org Cc: linuxppc-dev@lists.ozlabs.org Cc: sparclinux@vger.kernel.org arch/alpha/include/asm/Kbuild | 4 +++ arch/alpha/include/uapi/asm/ipcbuf.h | 2 -- arch/alpha/include/uapi/asm/msgbuf.h | 28 ----------------- arch/alpha/include/uapi/asm/sembuf.h | 23 -------------- arch/alpha/include/uapi/asm/shmbuf.h | 39 ----------------------- arch/arm64/include/asm/compat.h | 32 +++++++++---------- arch/ia64/include/asm/Kbuild | 4 +++ arch/ia64/include/uapi/asm/ipcbuf.h | 2 -- arch/ia64/include/uapi/asm/msgbuf.h | 28 ----------------- arch/ia64/include/uapi/asm/sembuf.h | 23 -------------- arch/ia64/include/uapi/asm/shmbuf.h | 39 ----------------------- arch/mips/include/asm/compat.h | 38 ++++++++++++----------- arch/mips/include/uapi/asm/msgbuf.h | 57 ++++++++++++++++++++++------------ arch/mips/include/uapi/asm/sembuf.h | 15 +++++++-- arch/mips/include/uapi/asm/shmbuf.h | 23 ++++++++++++-- arch/parisc/include/asm/compat.h | 32 +++++++++---------- arch/parisc/include/uapi/asm/msgbuf.h | 33 ++++++++++---------- arch/parisc/include/uapi/asm/sembuf.h | 16 +++++----- arch/parisc/include/uapi/asm/shmbuf.h | 19 +++++------- arch/powerpc/include/asm/compat.h | 32 +++++++++---------- arch/powerpc/include/uapi/asm/msgbuf.h | 18 +++++------ arch/powerpc/include/uapi/asm/sembuf.h | 14 ++++----- arch/powerpc/include/uapi/asm/shmbuf.h | 19 +++++------- arch/s390/include/asm/Kbuild | 3 ++ arch/s390/include/asm/compat.h | 32 +++++++++---------- arch/s390/include/uapi/asm/msgbuf.h | 38 ----------------------- arch/s390/include/uapi/asm/sembuf.h | 30 ------------------ arch/s390/include/uapi/asm/shmbuf.h | 49 ----------------------------- arch/sparc/include/asm/compat.h | 32 +++++++++---------- arch/sparc/include/uapi/asm/msgbuf.h | 22 ++++++------- arch/sparc/include/uapi/asm/sembuf.h | 16 +++++----- arch/sparc/include/uapi/asm/shmbuf.h | 21 ++++++------- arch/x86/include/asm/compat.h | 32 +++++++++---------- arch/x86/include/uapi/asm/Kbuild | 5 ++- arch/x86/include/uapi/asm/msgbuf.h | 1 - arch/x86/include/uapi/asm/sembuf.h | 11 ++++++- arch/x86/include/uapi/asm/shmbuf.h | 1 - arch/xtensa/include/uapi/asm/msgbuf.h | 25 +++++++-------- arch/xtensa/include/uapi/asm/sembuf.h | 17 +++++----- arch/xtensa/include/uapi/asm/shmbuf.h | 37 +++++----------------- include/uapi/asm-generic/msgbuf.h | 17 +++++----- include/uapi/asm-generic/sembuf.h | 26 ++++++++++------ include/uapi/asm-generic/shmbuf.h | 17 +++++----- ipc/msg.c | 20 ++++++++---- ipc/sem.c | 20 ++++++++---- ipc/shm.c | 14 +++++++-- 46 files changed, 393 insertions(+), 633 deletions(-) delete mode 100644 arch/alpha/include/uapi/asm/ipcbuf.h delete mode 100644 arch/alpha/include/uapi/asm/msgbuf.h delete mode 100644 arch/alpha/include/uapi/asm/sembuf.h delete mode 100644 arch/alpha/include/uapi/asm/shmbuf.h delete mode 100644 arch/ia64/include/uapi/asm/ipcbuf.h delete mode 100644 arch/ia64/include/uapi/asm/msgbuf.h delete mode 100644 arch/ia64/include/uapi/asm/sembuf.h delete mode 100644 arch/ia64/include/uapi/asm/shmbuf.h delete mode 100644 arch/s390/include/uapi/asm/msgbuf.h delete mode 100644 arch/s390/include/uapi/asm/sembuf.h delete mode 100644 arch/s390/include/uapi/asm/shmbuf.h delete mode 100644 arch/x86/include/uapi/asm/msgbuf.h delete mode 100644 arch/x86/include/uapi/asm/shmbuf.h -- 2.9.0