From patchwork Mon Dec 9 18:58:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elizabeth Figura X-Patchwork-Id: 848516 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 2EC7D19CCEC; Mon, 9 Dec 2024 19:03:04 +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=1733770986; cv=none; b=PMZKaDyUlEZ6y20ZPDQyR8mpXog4DEdkvhKn0+WoNHK/NTuP/ys36OByiA13Vjw4jwTGU+Wjh2hguQ1FtTTE4l5G4B865Y6VbXQ8OK+hHA672uMJQcnrMefhiJa2FnT+eTbrajkUhVK+ZnstjSVfZbklj8QVuN/zqaJQRg0h9qI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733770986; c=relaxed/simple; bh=dt45LmJEiSiP1XR8v8MoEfPn0UTXtfiHExBuAta6jms=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ru8dIk1uoVWxjwTjo05KXu9FSe7cWmvrm+PAWEfej0+3Atyt1cJJcV8kp+3fKvu76OopbjkdTYX4k79ZUgB/nwwvmdMQFRnTcjlpD5bSmQbFTiT8vS3Gc+2EPcrq3zC3hfOfL/+pYQeGCMwR4BW1El6eQZ/cvJVs12WUN7FvDHs= 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=mBKG3zDR; 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="mBKG3zDR" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=codeweavers.com; s=s1; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=SKJGtwUzzUoLxIjVaNdwAGBQ/Tls5kq3VYxfQTvAUCE=; b=mBKG3zDRx3Cte99YBlfx06TugW yO7hWSOCG/3CS8SW6B2I5lBxMd5vC3Byeo/F4smbdaGwe16UWF/lIzMT8qTZ3G+ZbGLYWtArnFyd7 C0uKAtheMfj+t8/61BkEwQZTX+fvE9IVmykAwGTbtg29R6eebbH+hTrqpFj7t/t5Pw7a0diVjIpFR N/sLwZjpr42ReaAEYT/c3lDmsevM0DuLXp2BmsUzyeG+7CGwza93N4+EdOrSP4I3LJUOnxcASjPjO ChrzDi+AxYYG6Kk3ZtMx4CsnDUzQCLypfQUcWzgBfWRZnoNpN891RJC6QlHbKJB+IgA1MjfzilEVH +mAEKy2g==; 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 1tKiya-001Gd5-2q; Mon, 09 Dec 2024 12:59:24 -0600 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 v6 10/28] ntsync: Introduce NTSYNC_IOC_SEM_READ. Date: Mon, 9 Dec 2024 12:58:46 -0600 Message-ID: <20241209185904.507350-11-zfigura@codeweavers.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241209185904.507350-1-zfigura@codeweavers.com> References: <20241209185904.507350-1-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 NtQuerySemaphore(). This returns the current count and maximum count of the semaphore. Signed-off-by: Elizabeth Figura --- drivers/misc/ntsync.c | 26 ++++++++++++++++++++++++++ include/uapi/linux/ntsync.h | 1 + 2 files changed, 27 insertions(+) diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c index 6b8352270874..d6e8a4bde1d0 100644 --- a/drivers/misc/ntsync.c +++ b/drivers/misc/ntsync.c @@ -583,6 +583,30 @@ static int ntsync_event_reset(struct ntsync_obj *event, void __user *argp) return 0; } +static int ntsync_sem_read(struct ntsync_obj *sem, void __user *argp) +{ + struct ntsync_sem_args __user *user_args = argp; + struct ntsync_device *dev = sem->dev; + struct ntsync_sem_args args; + bool all; + + if (sem->type != NTSYNC_TYPE_SEM) + return -EINVAL; + + args.sem = 0; + + all = ntsync_lock_obj(dev, sem); + + args.count = sem->u.sem.count; + args.max = sem->u.sem.max; + + ntsync_unlock_obj(dev, sem, all); + + if (copy_to_user(user_args, &args, sizeof(args))) + return -EFAULT; + return 0; +} + static int ntsync_obj_release(struct inode *inode, struct file *file) { struct ntsync_obj *obj = file->private_data; @@ -602,6 +626,8 @@ static long ntsync_obj_ioctl(struct file *file, unsigned int cmd, switch (cmd) { case NTSYNC_IOC_SEM_POST: return ntsync_sem_post(obj, argp); + case NTSYNC_IOC_SEM_READ: + return ntsync_sem_read(obj, argp); case NTSYNC_IOC_MUTEX_UNLOCK: return ntsync_mutex_unlock(obj, argp); case NTSYNC_IOC_MUTEX_KILL: diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h index 5586fadd9bdd..5e922703686f 100644 --- a/include/uapi/linux/ntsync.h +++ b/include/uapi/linux/ntsync.h @@ -54,5 +54,6 @@ struct ntsync_wait_args { #define NTSYNC_IOC_EVENT_SET _IOR ('N', 0x88, __u32) #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) #endif