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[209.132.180.67]) by mx.google.com with ESMTP id a2si4845216pgv.33.2019.01.18.08.27.56; Fri, 18 Jan 2019 08:28:14 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729106AbfARQ0C (ORCPT + 99 others); Fri, 18 Jan 2019 11:26:02 -0500 Received: from mout.kundenserver.de ([212.227.17.10]:43577 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729055AbfARQZ7 (ORCPT ); Fri, 18 Jan 2019 11:25:59 -0500 Received: from wuerfel.lan ([109.192.41.194]) by mrelayeu.kundenserver.de (mreue109 [212.227.15.145]) with ESMTPA (Nemesis) id 1MC2sF-1gwJ6T0HvR-00CT2U; Fri, 18 Jan 2019 17:19:44 +0100 From: Arnd Bergmann To: y2038@lists.linaro.org, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Cc: Arnd Bergmann , mattst88@gmail.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, tony.luck@intel.com, fenghua.yu@intel.com, geert@linux-m68k.org, monstr@monstr.eu, paul.burton@mips.com, deller@gmx.de, benh@kernel.crashing.org, mpe@ellerman.id.au, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, dalias@libc.org, davem@davemloft.net, luto@kernel.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, jcmvbkbc@gmail.com, akpm@linux-foundation.org, deepa.kernel@gmail.com, ebiederm@xmission.com, firoz.khan@linaro.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v2 21/29] sparc64: add custom adjtimex/clock_adjtime functions Date: Fri, 18 Jan 2019 17:18:27 +0100 Message-Id: <20190118161835.2259170-22-arnd@arndb.de> X-Mailer: git-send-email 2.20.0 In-Reply-To: <20190118161835.2259170-1-arnd@arndb.de> References: <20190118161835.2259170-1-arnd@arndb.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:SDXMCuyJzLqpJAifGRt40gvyBoqJCXKqswb2YTNLUtxnFDoMx/W +5ExJy+FfAJFZvijBjxP7IkCAiIawdbKOvGJdHKe9DVR4sJVPUHEfAz3zX8H8AA1DPfXKDv n3bInnzQVYWnqUfK3yPxDADtBoRxSd/sjf+LzwFX142gsdtJUUWkWGc2DO57CpmFKCkYQ/X gZwaHIWb6cg/fck75AVYA== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:3WR5HBahhWs=:bKh8uIghlKmK8pLF4Ftx9+ DcEYuHBgw1y20pCYM1R9uibMZCDH8TTxbO5ojtBSDVfyA6iDzIC7n3Ay5Q8da2dvkccrVzmAN 48gDTtfC11BhgOU+oM6Kgr9bZIFo1K4s/F5veehIwjAddV0CrryT6kgaah3F+wfBBM6znvOe6 JkmN824Q/VpVw3A65JduapO9wwrBjcAvYc8tzHLLSS+nuzzM37SfLYBnH3++9GS+KFY632edm rYwRvyzM+JfDlRWtxgq4ikXutn/SmoCu4DI8iLhYXvqDEYDEtomzC7DWuqVbcMwZI2nCL2Wug /XkDSvZbg86FmctSfQvtF0GrWHXBmeHWr139blXoda6ubCqqkAb6tMQo/b5lkAYeTbKHaISG6 lHlqLesFFyQmc8yaEm3ltALhNnVxQrrYEKdhN4/QA1/64gLmx0oXwKRSevIdP38UuwOM8W4B/ 6PrH04Ctl043oyH1Gl9ltz+7x2UQtvGxKlmN+2RY3uzx66ewR7JbiOKoGdo0Enwek7WiwmdkF Ux/d6ddsxLDrKSR/1JpXc9ncRxs+LKR38WfQCODGxR1z42Ce7qbCM/VZkZJ3XajGjCNQM3sb5 VVtA5NXI5DxLZQh+SL7Mc5dvEGBSNP6KZ0neCCGw0GyN6IKsdtXsI/b5lIF92iyxzkdSdmLeg U026wlbAwiqsrG+HDz7PMorMxP28fkAq6RmFjJITUyOyojzYQAgddBIfr+INY+48G80uKhmvB UbgAbg8BN12CN32y4egygqvzhTsFmHEBaAotfA== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org sparc64 is the only architecture on Linux that has a 'timeval' definition with a 32-bit tv_usec but a 64-bit tv_sec. This causes problems for sparc32 compat mode when we convert it to use the new __kernel_timex type that has the same layout as all other 64-bit architectures. To avoid adding sparc64 specific code into the generic adjtimex implementation, this adds a wrapper in the sparc64 system call handling that converts the sparc64 'timex' into the new '__kernel_timex'. At this point, the two structures are defined to be identical, but that will change in the next step once we convert sparc32. Signed-off-by: Arnd Bergmann --- arch/sparc/kernel/sys_sparc_64.c | 59 +++++++++++++++++++++++++- arch/sparc/kernel/syscalls/syscall.tbl | 6 ++- include/linux/timex.h | 2 + kernel/time/posix-timers.c | 24 +++++------ 4 files changed, 76 insertions(+), 15 deletions(-) diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c index 1c079e7bab09..37de18a11207 100644 --- a/arch/sparc/kernel/sys_sparc_64.c +++ b/arch/sparc/kernel/sys_sparc_64.c @@ -28,8 +28,9 @@ #include #include #include - +#include #include + #include #include @@ -544,6 +545,62 @@ SYSCALL_DEFINE2(getdomainname, char __user *, name, int, len) return err; } +SYSCALL_DEFINE1(sparc_adjtimex, struct timex __user *, txc_p) +{ + struct timex txc; /* Local copy of parameter */ + struct timex *kt = (void *)&txc; + int ret; + + /* Copy the user data space into the kernel copy + * structure. But bear in mind that the structures + * may change + */ + if (copy_from_user(&txc, txc_p, sizeof(struct timex))) + return -EFAULT; + + /* + * override for sparc64 specific timeval type: tv_usec + * is 32 bit wide instead of 64-bit in __kernel_timex + */ + kt->time.tv_usec = txc.time.tv_usec; + ret = do_adjtimex(kt); + txc.time.tv_usec = kt->time.tv_usec; + + return copy_to_user(txc_p, &txc, sizeof(struct timex)) ? -EFAULT : ret; +} + +SYSCALL_DEFINE2(sparc_clock_adjtime, const clockid_t, which_clock,struct timex __user *, txc_p) +{ + struct timex txc; /* Local copy of parameter */ + struct timex *kt = (void *)&txc; + int ret; + + if (!IS_ENABLED(CONFIG_POSIX_TIMERS)) { + pr_err_once("process %d (%s) attempted a POSIX timer syscall " + "while CONFIG_POSIX_TIMERS is not set\n", + current->pid, current->comm); + + return -ENOSYS; + } + + /* Copy the user data space into the kernel copy + * structure. But bear in mind that the structures + * may change + */ + if (copy_from_user(&txc, txc_p, sizeof(struct timex))) + return -EFAULT; + + /* + * override for sparc64 specific timeval type: tv_usec + * is 32 bit wide instead of 64-bit in __kernel_timex + */ + kt->time.tv_usec = txc.time.tv_usec; + ret = do_clock_adjtime(which_clock, kt); + txc.time.tv_usec = kt->time.tv_usec; + + return copy_to_user(txc_p, &txc, sizeof(struct timex)) ? -EFAULT : ret; +} + SYSCALL_DEFINE5(utrap_install, utrap_entry_t, type, utrap_handler_t, new_p, utrap_handler_t, new_d, utrap_handler_t __user *, old_p, diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl index 24ebef675184..e70110375399 100644 --- a/arch/sparc/kernel/syscalls/syscall.tbl +++ b/arch/sparc/kernel/syscalls/syscall.tbl @@ -258,7 +258,8 @@ 216 64 sigreturn sys_nis_syscall 217 common clone sys_clone 218 common ioprio_get sys_ioprio_get -219 common adjtimex sys_adjtimex compat_sys_adjtimex +219 32 adjtimex sys_adjtimex compat_sys_adjtimex +219 64 adjtimex sys_sparc_adjtimex 220 32 sigprocmask sys_sigprocmask compat_sys_sigprocmask 220 64 sigprocmask sys_nis_syscall 221 common create_module sys_ni_syscall @@ -377,7 +378,8 @@ 331 common prlimit64 sys_prlimit64 332 common name_to_handle_at sys_name_to_handle_at 333 common open_by_handle_at sys_open_by_handle_at compat_sys_open_by_handle_at -334 common clock_adjtime sys_clock_adjtime compat_sys_clock_adjtime +334 32 clock_adjtime sys_clock_adjtime compat_sys_clock_adjtime +334 64 clock_adjtime sys_sparc_clock_adjtime 335 common syncfs sys_syncfs 336 common sendmmsg sys_sendmmsg compat_sys_sendmmsg 337 common setns sys_setns diff --git a/include/linux/timex.h b/include/linux/timex.h index 7f40e9e42ecc..a15e6aeb8d49 100644 --- a/include/linux/timex.h +++ b/include/linux/timex.h @@ -159,6 +159,8 @@ extern unsigned long tick_nsec; /* SHIFTED_HZ period (nsec) */ #define NTP_INTERVAL_LENGTH (NSEC_PER_SEC/NTP_INTERVAL_FREQ) extern int do_adjtimex(struct timex *); +extern int do_clock_adjtime(const clockid_t which_clock, struct timex * ktx); + extern void hardpps(const struct timespec64 *, const struct timespec64 *); int read_current_timer(unsigned long *timer_val); diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 8955f32f2a36..8f7f1dd95940 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1047,22 +1047,28 @@ SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, return error; } -SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock, - struct timex __user *, utx) +int do_clock_adjtime(const clockid_t which_clock, struct timex * ktx) { const struct k_clock *kc = clockid_to_kclock(which_clock); - struct timex ktx; - int err; if (!kc) return -EINVAL; if (!kc->clock_adj) return -EOPNOTSUPP; + return kc->clock_adj(which_clock, ktx); +} + +SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock, + struct timex __user *, utx) +{ + struct timex ktx; + int err; + if (copy_from_user(&ktx, utx, sizeof(ktx))) return -EFAULT; - err = kc->clock_adj(which_clock, &ktx); + err = do_clock_adjtime(which_clock, &ktx); if (err >= 0 && copy_to_user(utx, &ktx, sizeof(ktx))) return -EFAULT; @@ -1126,20 +1132,14 @@ COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock, COMPAT_SYSCALL_DEFINE2(clock_adjtime, clockid_t, which_clock, struct old_timex32 __user *, utp) { - const struct k_clock *kc = clockid_to_kclock(which_clock); struct timex ktx; int err; - if (!kc) - return -EINVAL; - if (!kc->clock_adj) - return -EOPNOTSUPP; - err = get_old_timex32(&ktx, utp); if (err) return err; - err = kc->clock_adj(which_clock, &ktx); + err = do_clock_adjtime(which_clock, &ktx); if (err >= 0) err = put_old_timex32(utp, &ktx); -- 2.20.0