From patchwork Tue Sep 13 14:10:04 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Deepa Dinamani X-Patchwork-Id: 9329211 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C7C3560231 for ; Tue, 13 Sep 2016 14:11:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B8421294F3 for ; Tue, 13 Sep 2016 14:11:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id ACE18294F6; Tue, 13 Sep 2016 14:11:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,FREEMAIL_FROM,RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 45EBB294F4 for ; Tue, 13 Sep 2016 14:11:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758517AbcIMOKq (ORCPT ); Tue, 13 Sep 2016 10:10:46 -0400 Received: from mail-pa0-f66.google.com ([209.85.220.66]:36863 "EHLO mail-pa0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751135AbcIMOKj (ORCPT ); Tue, 13 Sep 2016 10:10:39 -0400 Received: by mail-pa0-f66.google.com with SMTP id p2so3042860pap.3; Tue, 13 Sep 2016 07:10:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=2giXCCbVSNhLreW2xa3i/yn6quIT/LY8UJpqI4sp3tU=; b=xqI4ClhaHaVO2FdLaEOVO6n/rh4dYMnr4AMeSYKpmWAqy2Sss9jUDlYK4n2oIZHO3n Xk2FxnPPUuKsUy1/F1cLNpDEzZioqMxSC2JQP1ax7nXylaCe1p2Fuc7JBi36e3O61Lfq 030SoW7ZRdL7r02U3HWdtyPU+aKjfYOiKWTNRDGomKa+6vs6Oku3WlVL2wrXhgvn5Bap 6GqBx3XOif0B9AvXzasDIwpHLMkMnIlVPAIyPjsJOSYBfhQ5fmLAqNpmjrUZwtPsTfFY aS6gqgWGddF7LQ2haXs6XIuPX4mbzK6iv7plKcdmnjJ0bk4bee+zOBRXjDlDWv8CSUKR 56cw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=2giXCCbVSNhLreW2xa3i/yn6quIT/LY8UJpqI4sp3tU=; b=bIAoO5XoWKt0xH1hj8S2JkFc89H6lOoLx09odKKtfRaXbpIfE6ecy8KHPiLOaemo6h KygLGBk1j1V4NM45Zo0a6uCv7sSwWOE0Y8K1/VwrtF0XMVu/wuByZEsWJXS/vDZOAK2R IYQnhW7QSTcPykemdPlIJIoMB/XRILBZ7vTpJABUyT8XME/hUxuc2k1i0O3O8dOGpkHR 1A2FAGytu+ZrHR/DegD+L/oaK4EYOTHWjnbLuWQEMWAAsvwrPxdIeLy/DW+oR4Ul0kt2 Gh4cFXUwGV3+sDx4cpVZi9vfrLP+q0ORnoFOgW7MUeQt6qoxTNvbIrzp/Wx6DvolMmzT efQA== X-Gm-Message-State: AE9vXwN+9Kb0sGzwRwL7q12Fmk666OTzViysPC9eCsQJE4cp4kMfePjAU11d1jiqGGCJcQ== X-Received: by 10.66.120.143 with SMTP id lc15mr1622048pab.139.1473775838816; Tue, 13 Sep 2016 07:10:38 -0700 (PDT) Received: from deepa-ubuntu.hsd1.ca.comcast.net ([2601:647:5000:6620:d498:fb30:692a:b2f2]) by smtp.gmail.com with ESMTPSA id dh16sm11968193pac.4.2016.09.13.07.10.37 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 13 Sep 2016 07:10:38 -0700 (PDT) From: Deepa Dinamani To: Dmitry Torokhov , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Cc: arnd@arndb.de, y2038@lists.linaro.org Subject: [PATCH 3/4] input: Deprecate real timestamps beyond year 2106 Date: Tue, 13 Sep 2016 07:10:04 -0700 Message-Id: <1473775805-2242-4-git-send-email-deepa.kernel@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1473775805-2242-1-git-send-email-deepa.kernel@gmail.com> References: <1473775805-2242-1-git-send-email-deepa.kernel@gmail.com> Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP struct timeval is not y2038 safe. All usage of timeval in the kernel will be replaced by y2038 safe structures. struct input_event maintains time for each input event. Real time timestamps are not ideal for input as this time can go backwards as noted in the patch a80b83b7b8 by John Stultz. Hence, having the input_event.time fields only big enough for monotonic and boot times are sufficient. Leave the original input_event as is. This is to maintain backward compatibility with existing userspace interfaces that use input_event. Introduce a new replacement struct raw_input_event. This replaces timeval with struct input_timeval. This structure maintains time in __kernel_ulong_t or compat_ulong_t to allow for architectures to override types as in the case of x32. The change requires any userspace utilities reading or writing from event nodes to update their reading format to match raw_input_event.The changes to the popular libraries will be posted along with the kernel changes. The driver version is also updated to reflect the change in event format. Suggested-by: Arnd Bergmann Signed-off-by: Deepa Dinamani --- drivers/input/evdev.c | 20 ++++++++++---------- drivers/input/input-compat.c | 25 +++++++++++++------------ drivers/input/input-compat.h | 19 ++++++++++++------- drivers/input/misc/uinput.c | 6 +++--- include/linux/uinput.h | 2 +- include/uapi/linux/input.h | 37 +++++++++++++++++++++++++++++++++++++ 6 files changed, 76 insertions(+), 33 deletions(-) diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index bda2b61..f56188d 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -60,7 +60,7 @@ struct evdev_client { bool revoked; unsigned long *evmasks[EV_CNT]; unsigned int bufsize; - struct input_event buffer[]; + struct raw_input_event buffer[]; }; static size_t evdev_get_mask_cnt(unsigned int type) @@ -113,7 +113,7 @@ static void __evdev_flush_queue(struct evdev_client *client, unsigned int type) unsigned int i, head, num; unsigned int mask = client->bufsize - 1; bool is_report; - struct input_event *ev; + struct raw_input_event *ev; BUG_ON(type == EV_SYN); @@ -155,7 +155,7 @@ static void __evdev_flush_queue(struct evdev_client *client, unsigned int type) static void __evdev_queue_syn_dropped(struct evdev_client *client) { - struct input_event ev; + struct raw_input_event ev; ktime_t time; struct timespec64 ts; @@ -232,7 +232,7 @@ static int evdev_set_clk_type(struct evdev_client *client, unsigned int clkid) } static void __pass_event(struct evdev_client *client, - const struct input_event *event) + const struct raw_input_event *event) { client->buffer[client->head++] = *event; client->head &= client->bufsize - 1; @@ -264,7 +264,7 @@ static void evdev_pass_values(struct evdev_client *client, { struct evdev *evdev = client->evdev; const struct input_value *v; - struct input_event event; + struct raw_input_event event; struct timespec64 ts; bool wakeup = false; @@ -504,7 +504,7 @@ static int evdev_open(struct inode *inode, struct file *file) struct evdev *evdev = container_of(inode->i_cdev, struct evdev, cdev); unsigned int bufsize = evdev_compute_buffer_size(evdev->handle.dev); unsigned int size = sizeof(struct evdev_client) + - bufsize * sizeof(struct input_event); + bufsize * sizeof(struct raw_input_event); struct evdev_client *client; int error; @@ -539,7 +539,7 @@ static ssize_t evdev_write(struct file *file, const char __user *buffer, { struct evdev_client *client = file->private_data; struct evdev *evdev = client->evdev; - struct input_event event; + struct raw_input_event event; int retval = 0; if (count != 0 && count < input_event_size()) @@ -572,7 +572,7 @@ static ssize_t evdev_write(struct file *file, const char __user *buffer, } static int evdev_fetch_next_event(struct evdev_client *client, - struct input_event *event) + struct raw_input_event *event) { int have_event; @@ -594,7 +594,7 @@ static ssize_t evdev_read(struct file *file, char __user *buffer, { struct evdev_client *client = file->private_data; struct evdev *evdev = client->evdev; - struct input_event event; + struct raw_input_event event; size_t read = 0; int error; @@ -1080,7 +1080,7 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, switch (cmd) { case EVIOCGVERSION: - return put_user(EV_VERSION, ip); + return put_user(EV_VERSION_1_2, ip); case EVIOCGID: if (copy_to_user(p, &dev->id, sizeof(struct input_id))) diff --git a/drivers/input/input-compat.c b/drivers/input/input-compat.c index d84d20b..c94746d 100644 --- a/drivers/input/input-compat.c +++ b/drivers/input/input-compat.c @@ -15,10 +15,10 @@ #ifdef CONFIG_COMPAT int input_event_from_user(const char __user *buffer, - struct input_event *event) + struct raw_input_event *event) { - if (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) { - struct input_event_compat compat_event; + if (in_compat_syscall()) { + struct raw_input_event_compat compat_event; if (copy_from_user(&compat_event, buffer, sizeof(struct input_event_compat))) @@ -31,7 +31,8 @@ int input_event_from_user(const char __user *buffer, event->value = compat_event.value; } else { - if (copy_from_user(event, buffer, sizeof(struct input_event))) + if (copy_from_user(event, buffer, + sizeof(struct raw_input_event))) return -EFAULT; } @@ -39,10 +40,10 @@ int input_event_from_user(const char __user *buffer, } int input_event_to_user(char __user *buffer, - const struct input_event *event) + const struct raw_input_event *event) { - if (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) { - struct input_event_compat compat_event; + if (in_compat_syscall()) { + struct raw_input_event_compat compat_event; compat_event.time.tv_sec = event->time.tv_sec; compat_event.time.tv_usec = event->time.tv_usec; @@ -55,7 +56,7 @@ int input_event_to_user(char __user *buffer, return -EFAULT; } else { - if (copy_to_user(buffer, event, sizeof(struct input_event))) + if (copy_to_user(buffer, event, sizeof(struct raw_input_event))) return -EFAULT; } @@ -100,18 +101,18 @@ int input_ff_effect_from_user(const char __user *buffer, size_t size, #else int input_event_from_user(const char __user *buffer, - struct input_event *event) + struct raw_input_event *event) { - if (copy_from_user(event, buffer, sizeof(struct input_event))) + if (copy_from_user(event, buffer, sizeof(struct raw_input_event))) return -EFAULT; return 0; } int input_event_to_user(char __user *buffer, - const struct input_event *event) + const struct raw_input_event *event) { - if (copy_to_user(buffer, event, sizeof(struct input_event))) + if (copy_to_user(buffer, event, sizeof(struct raw_input_event))) return -EFAULT; return 0; diff --git a/drivers/input/input-compat.h b/drivers/input/input-compat.h index 1563160..c18132d 100644 --- a/drivers/input/input-compat.h +++ b/drivers/input/input-compat.h @@ -17,8 +17,13 @@ #ifdef CONFIG_COMPAT -struct input_event_compat { - struct compat_timeval time; +struct input_timeval_compat { + compat_ulong_t tv_sec; + compat_ulong_t tv_usec; +}; + +struct raw_input_event_compat { + struct input_timeval_compat time; __u16 type; __u16 code; __s32 value; @@ -55,24 +60,24 @@ struct ff_effect_compat { static inline size_t input_event_size(void) { - return (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) ? - sizeof(struct input_event_compat) : sizeof(struct input_event); + return in_compat_syscall() ? sizeof(struct raw_input_event_compat) : + sizeof(struct raw_input_event); } #else static inline size_t input_event_size(void) { - return sizeof(struct input_event); + return sizeof(struct raw_input_event); } #endif /* CONFIG_COMPAT */ int input_event_from_user(const char __user *buffer, - struct input_event *event); + struct raw_input_event *event); int input_event_to_user(char __user *buffer, - const struct input_event *event); + const struct raw_input_event *event); int input_ff_effect_from_user(const char __user *buffer, size_t size, struct ff_effect *effect); diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c index ae22927..993bd24 100644 --- a/drivers/input/misc/uinput.c +++ b/drivers/input/misc/uinput.c @@ -564,7 +564,7 @@ static int uinput_setup_device_legacy(struct uinput_device *udev, static ssize_t uinput_inject_events(struct uinput_device *udev, const char __user *buffer, size_t count) { - struct input_event ev; + struct raw_input_event ev; size_t bytes = 0; if (count != 0 && count < input_event_size()) @@ -610,7 +610,7 @@ static ssize_t uinput_write(struct file *file, const char __user *buffer, } static bool uinput_fetch_next_event(struct uinput_device *udev, - struct input_event *event) + struct raw_input_event *event) { bool have_event; @@ -630,7 +630,7 @@ static bool uinput_fetch_next_event(struct uinput_device *udev, static ssize_t uinput_events_to_user(struct uinput_device *udev, char __user *buffer, size_t count) { - struct input_event event; + struct raw_input_event event; size_t read = 0; while (read + input_event_size() <= count && diff --git a/include/linux/uinput.h b/include/linux/uinput.h index 6527fb7..d1accb3 100644 --- a/include/linux/uinput.h +++ b/include/linux/uinput.h @@ -71,7 +71,7 @@ struct uinput_device { unsigned char ready; unsigned char head; unsigned char tail; - struct input_event buff[UINPUT_BUFFER_SIZE]; + struct raw_input_event buff[UINPUT_BUFFER_SIZE]; int clk_type; unsigned int ff_effects_max; diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h index e794f7b..1379899 100644 --- a/include/uapi/linux/input.h +++ b/include/uapi/linux/input.h @@ -21,7 +21,23 @@ /* * The event structure itself */ +struct input_timeval { + __kernel_ulong_t tv_sec; + __kernel_ulong_t tv_usec; +}; + +struct raw_input_event { + struct input_timeval time; + __u16 type; + __u16 code; + __s32 value; +}; +/* Userspace structure. + * Definition maintained here for userspace that is not yet updated to use + * struct raw_input_event. + * Not to be used anywhere within the kernel. + */ struct input_event { struct timeval time; __u16 type; @@ -29,11 +45,32 @@ struct input_event { __s32 value; }; +static inline void +raw_input_to_input_event(struct raw_input_event *raw, struct input_event *ev) +{ + ev->time.tv_sec = raw->time.tv_sec; + ev->time.tv_usec = raw->time.tv_usec; + ev->type = raw->type; + ev->code = raw->code; + ev->value = raw->value; +} + +static inline void +input_to_raw_event(struct input_event *ev, struct raw_input_event *raw) +{ + raw->time.tv_sec = ev->time.tv_sec; + raw->time.tv_usec = ev->time.tv_usec; + raw->type = ev->type; + raw->code = ev->code; + raw->value = ev->value; +} + /* * Protocol version. */ #define EV_VERSION 0x010001 +#define EV_VERSION_1_2 0x010002 /* * IOCTLs (0x00 - 0x7f)