From patchwork Fri Mar 29 00:06:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elizabeth Figura X-Patchwork-Id: 784314 Received: from mail.codeweavers.com (mail.codeweavers.com [4.36.192.163]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 63C342D607; Fri, 29 Mar 2024 00:23:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=4.36.192.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711671828; cv=none; b=Eqxf25Ugb4tokBQ6ZB7nF0CiBfC7m7LSJbPfI2KFoc9MNVQbWcoKBhGyK5FFNBFbuCjH3qfTsXL1qivaAjLmnR1FGsTSdF6pJBiUlvbANT6lAwyOHHKYOdxMxqSrscnVF5nRWYa6Qk+UVsgIEW7I+/9HuPuocXw/FE0UKihdjfc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711671828; c=relaxed/simple; bh=c+LLrvBoCuPfC4CclqS/TQ4HIIJMP43vsE7lYq1LxX4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lMHSTc1mAi+DGwJ9gHZRY3BekC3YR9cqfowOgFTTA0tcGgH+irrTUDLc/i0dmr1gBK/f64Jopo4FtU8OtYin4V3QRe2SpcsOOzYuuLkAscSPh8yoEV+8QTYRxeZchhB0W4jfCJ87wpxLFCqgK9pN61fylbZs7Jtt3t8dREWbKMg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=codeweavers.com; spf=pass smtp.mailfrom=codeweavers.com; dkim=pass (2048-bit key) header.d=codeweavers.com header.i=@codeweavers.com header.b=VNGddvTb; arc=none smtp.client-ip=4.36.192.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=codeweavers.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=codeweavers.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=codeweavers.com header.i=@codeweavers.com header.b="VNGddvTb" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=codeweavers.com; s=s1; h=Message-ID:Date:Subject:Cc:To:From:Sender; bh=JMqQ+0LCTlI6uyQYIwA0XTuobJBuM0j6P3qXqvgCk9c=; b=VNGddvTbuRKa8ippqtioxqA1Q7 qTov5UjGUx7jEE7mg8111Fwme3cIcIidH5TaRLrPiPJBeOOkyUX83H10Gu595W639yzegPhqIL11H hONnZhEDSSA+TueBNmGgkJcQ1t/lGJ3PKC1DTWXfNkLTHytzKiubun4nI3+kD/jGpY5xARwG9syAw vMrtYoK3isYymUAZcWZLAYdt2dWIFlVqdztXdaRqrz21AVVbwjChvSN9Z9VblaRrLqycrjaR6Rmxx 10V13ddC+cEL2IauQY8WDbZ8q810uMZ8VdHXi8fO6oVM8wbjHRs/SUeWNVLXPttZKLL8OnGFZ2dsN 7y5xN2Dg==; Received: from cw137ip160.mn.codeweavers.com ([10.69.137.160] helo=camazotz.mn.codeweavers.com) by mail.codeweavers.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1rpzlN-000iik-1r; Thu, 28 Mar 2024 19:06:29 -0500 From: Elizabeth Figura To: Arnd Bergmann , Greg Kroah-Hartman , Jonathan Corbet , Shuah Khan Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, wine-devel@winehq.org, =?utf-8?q?Andr=C3=A9_Almeida?= , Wolfram Sang , Arkadiusz Hiler , Peter Zijlstra , Andy Lutomirski , linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Randy Dunlap , Elizabeth Figura Subject: [PATCH v3 10/30] ntsync: Introduce NTSYNC_IOC_EVENT_SET. Date: Thu, 28 Mar 2024 19:06:01 -0500 Message-ID: <20240329000621.148791-11-zfigura@codeweavers.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240329000621.148791-1-zfigura@codeweavers.com> References: <20240329000621.148791-1-zfigura@codeweavers.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This corresponds to the NT syscall NtSetEvent(). This sets the event to the signaled state, and returns its previous state. Signed-off-by: Elizabeth Figura --- drivers/misc/ntsync.c | 37 +++++++++++++++++++++++++++++++++++++ include/uapi/linux/ntsync.h | 1 + 2 files changed, 38 insertions(+) diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c index 3e125c805c00..69f359241cf6 100644 --- a/drivers/misc/ntsync.c +++ b/drivers/misc/ntsync.c @@ -473,6 +473,41 @@ static int ntsync_mutex_kill(struct ntsync_obj *mutex, void __user *argp) return ret; } +static int ntsync_event_set(struct ntsync_obj *event, void __user *argp) +{ + struct ntsync_device *dev = event->dev; + __u32 prev_state; + + if (event->type != NTSYNC_TYPE_EVENT) + return -EINVAL; + + if (atomic_read(&event->all_hint) > 0) { + spin_lock(&dev->wait_all_lock); + spin_lock_nest_lock(&event->lock, &dev->wait_all_lock); + + prev_state = event->u.event.signaled; + event->u.event.signaled = true; + try_wake_all_obj(dev, event); + try_wake_any_event(event); + + spin_unlock(&event->lock); + spin_unlock(&dev->wait_all_lock); + } else { + spin_lock(&event->lock); + + prev_state = event->u.event.signaled; + event->u.event.signaled = true; + try_wake_any_event(event); + + spin_unlock(&event->lock); + } + + if (put_user(prev_state, (__u32 __user *)argp)) + return -EFAULT; + + return 0; +} + static int ntsync_obj_release(struct inode *inode, struct file *file) { struct ntsync_obj *obj = file->private_data; @@ -496,6 +531,8 @@ static long ntsync_obj_ioctl(struct file *file, unsigned int cmd, return ntsync_mutex_unlock(obj, argp); case NTSYNC_IOC_MUTEX_KILL: return ntsync_mutex_kill(obj, argp); + case NTSYNC_IOC_EVENT_SET: + return ntsync_event_set(obj, argp); default: return -ENOIOCTLCMD; } diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h index 0d133f2eaf0b..65329d15a472 100644 --- a/include/uapi/linux/ntsync.h +++ b/include/uapi/linux/ntsync.h @@ -52,5 +52,6 @@ struct ntsync_wait_args { #define NTSYNC_IOC_SEM_POST _IOWR('N', 0x81, __u32) #define NTSYNC_IOC_MUTEX_UNLOCK _IOWR('N', 0x85, struct ntsync_mutex_args) #define NTSYNC_IOC_MUTEX_KILL _IOW ('N', 0x86, __u32) +#define NTSYNC_IOC_EVENT_SET _IOR ('N', 0x88, __u32) #endif