From patchwork Sun May 19 20:24:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elizabeth Figura X-Patchwork-Id: 13667913 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 0B8A66EB5F; Sun, 19 May 2024 20:25:15 +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=1716150318; cv=none; b=dDAXY0IDxjluJGRYf/Kyc00mEdhUnhEOC4tnuJmriiEcBCfn13sHYIGB/1nr7oe3nk3hlMs2Kv2uOD7w2Q/Xp/xx6D0UvQd6ztrfhpFgC9463I0LC76wLDgH7Qoh9pXYCXwM7CvcDrOpxc5H16RbxOAf+wnLtNh4QFEUEsLoiwQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716150318; c=relaxed/simple; bh=lBBJGgDiheSxZzqAmULQlnQ736+/Gq90V1LdkV/q+30=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=b6dE6lg4ab7x37urIiRJpihIvceO+LBuWg+CwMIonP8OXsA7bldALrt+pZRF3dOiN/elWuu701W1UNqG63E0RRAWnHkxW/fCw9dEaaY2Ahfu4hzbbDe3SOI+gciGIJgUZFjK7/GVWRHWq38dUk5DtXm7mVXJzvagTbBOao4h63g= 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=ozbAO8d6; 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="ozbAO8d6" 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=Xiql2IKLoebqgT1FdXxUiO6lyiCYg36adwMvkFTJSLM=; b=ozbAO8d68F2po+Bf8a4zjpSSoN oZWrx76KAKK1W/IFi9SMwmGg2s9gC7eOOXXXoSQ2I2od497ZOwJabuZpyWfajjgRMhc43jjjnBrON N9Upg9/xl9ZZ6rpVWF5dTGfX0ZtCACb52aGPze6+kRiGIyVetapBUqvSSvGrgStqoXBTuh2EdM0PQ DQf03emMr1Yt7VD52D8aqnTq/OSlpmRBwWoaqzYMeVAMkTITtQlv371OPFrdOu09MIUzN5pqXEuEM 7eUwnPcMtsuXDWICCk84GKlSPaEm2IsjGalx/dVzYlGZrYV7uTSgOzzD1ljhyv+pT400BThCysjgh zK8glb8g==; 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 1s8n5d-008wIn-0Z; Sun, 19 May 2024 15:25:05 -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 , Ingo Molnar , Will Deacon , Waiman Long , Boqun Feng , Elizabeth Figura Subject: [PATCH v5 11/28] ntsync: Introduce NTSYNC_IOC_MUTEX_READ. Date: Sun, 19 May 2024 15:24:37 -0500 Message-ID: <20240519202454.1192826-12-zfigura@codeweavers.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240519202454.1192826-1-zfigura@codeweavers.com> References: <20240519202454.1192826-1-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 NtQueryMutant(). This returns the recursion count, owner, and abandoned state of the mutex. Signed-off-by: Elizabeth Figura --- drivers/misc/ntsync.c | 28 ++++++++++++++++++++++++++++ include/uapi/linux/ntsync.h | 1 + 2 files changed, 29 insertions(+) diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c index 4c680a2b8353..622be0075ba4 100644 --- a/drivers/misc/ntsync.c +++ b/drivers/misc/ntsync.c @@ -607,6 +607,32 @@ static int ntsync_sem_read(struct ntsync_obj *sem, void __user *argp) return 0; } +static int ntsync_mutex_read(struct ntsync_obj *mutex, void __user *argp) +{ + struct ntsync_mutex_args __user *user_args = argp; + struct ntsync_device *dev = mutex->dev; + struct ntsync_mutex_args args; + bool all; + int ret; + + if (mutex->type != NTSYNC_TYPE_MUTEX) + return -EINVAL; + + args.mutex = 0; + + all = ntsync_lock_obj(dev, mutex); + + args.count = mutex->u.mutex.count; + args.owner = mutex->u.mutex.owner; + ret = mutex->u.mutex.ownerdead ? -EOWNERDEAD : 0; + + ntsync_unlock_obj(dev, mutex, all); + + if (copy_to_user(user_args, &args, sizeof(args))) + return -EFAULT; + return ret; +} + static int ntsync_obj_release(struct inode *inode, struct file *file) { struct ntsync_obj *obj = file->private_data; @@ -632,6 +658,8 @@ 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_MUTEX_READ: + return ntsync_mutex_read(obj, argp); case NTSYNC_IOC_EVENT_SET: return ntsync_event_set(obj, argp, false); case NTSYNC_IOC_EVENT_RESET: diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h index 5e922703686f..eced73d08783 100644 --- a/include/uapi/linux/ntsync.h +++ b/include/uapi/linux/ntsync.h @@ -55,5 +55,6 @@ struct ntsync_wait_args { #define NTSYNC_IOC_EVENT_RESET _IOR ('N', 0x89, __u32) #define NTSYNC_IOC_EVENT_PULSE _IOR ('N', 0x8a, __u32) #define NTSYNC_IOC_SEM_READ _IOR ('N', 0x8b, struct ntsync_sem_args) +#define NTSYNC_IOC_MUTEX_READ _IOR ('N', 0x8c, struct ntsync_mutex_args) #endif