From nobody Tue Feb 10 00:22:16 2026 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 BEC447464; Tue, 16 Apr 2024 01:10:28 +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=1713229831; cv=none; b=ahKwtDCF9xjoB7art8m9zeDts8werqAJWbC1YQf35ssO3KYtyH8xNSv70cz+SweQmkDHUOvyiK1c1OdPQJl+BaiSEpPqumtw+utdudcFzaYUUQYNtQOFwgsyWjPrjs6lnPj0M1OfIV2NT+sWl0ZLYvkJG0C3KGa/MY61X+MA0D0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713229831; c=relaxed/simple; bh=UN9Nfe2JCeuY40Ye1bxTcEPn0D03/ofONdhjgUU8g/w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MdKdEbnu1Jyt1PjauGF9g8bktujEWFgkHtPpWU7WWV2kMTKm+TnTMrwpFjdK78vmlltQk5m9yAlsw3ajxATUfvFVvrYIAl1OvVxZvq6Hs4HfHf9NdHzvn6nDUzo1vn7rxIQRrPBDzzqLAgMtJiT5TVEXX6nrE1jComU0CuKmC4U= 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=fMgloozO; 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="fMgloozO" 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=xoCW3VfT0NsdMSW0YV9u0WiyZ8B+glBSEOsX8z5MC4I=; b=fMgloozO4wX0dCOU4Xst8BwqlD YrIk1l6lRTB91LdX/oJhDLBSJY+i41IU9xxLi8SopOQl/CmvloMOwAPebHY5rzi8CoAy7cb3b7UVs 55pGbmmAm4bIym5s9FlXxAnMX8MU8Bpz4ygpWkoXTWAWogl6Y2KXrxNqHzV5TPfSpy9jSyvSptJ1j qA7vJpapk+SVvEyD/Jm2KEVUAGQstJUErOeWrmfVwWm63hGN+jVVk57KpWBVHNzzgzXf11lfg8nVh VG9iWIBmvSKnNdSw44RVgDE0mQr/5hkRozz/CFfnDcLTKtXQbpojuYNY2Fo7YetCQRTH5jauTEXC0 PyaMcnJw==; 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 1rwXL0-00FbQv-1o; Mon, 15 Apr 2024 20:10:18 -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=20Almeida?= , 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 v4 10/27] ntsync: Introduce NTSYNC_IOC_SEM_READ. Date: Mon, 15 Apr 2024 20:08:20 -0500 Message-ID: <20240416010837.333694-11-zfigura@codeweavers.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240416010837.333694-1-zfigura@codeweavers.com> References: <20240416010837.333694-1-zfigura@codeweavers.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 | 21 +++++++++++++++++++++ include/uapi/linux/ntsync.h | 1 + 2 files changed, 22 insertions(+) diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c index adba4657bf26..961e8d241602 100644 --- a/drivers/misc/ntsync.c +++ b/drivers/misc/ntsync.c @@ -532,6 +532,25 @@ static int ntsync_event_reset(struct ntsync_obj *event= , void __user *argp) return 0; } =20 +static int ntsync_sem_read(struct ntsync_obj *sem, void __user *argp) +{ + struct ntsync_sem_args __user *user_args =3D argp; + struct ntsync_sem_args args; + + if (sem->type !=3D NTSYNC_TYPE_SEM) + return -EINVAL; + + args.sem =3D 0; + spin_lock(&sem->lock); + args.count =3D sem->u.sem.count; + args.max =3D sem->u.sem.max; + spin_unlock(&sem->lock); + + 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 =3D file->private_data; @@ -551,6 +570,8 @@ static long ntsync_obj_ioctl(struct file *file, unsigne= d 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 57721f5d31ba..e298400bf25a 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_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) =20 #endif --=20 2.43.0