From: Elizabeth Figura <zfigura@codeweavers.com>
To: Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jonathan Corbet <corbet@lwn.net>, Shuah Khan <shuah@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
wine-devel@winehq.org, "André Almeida" <andrealmeid@igalia.com>,
"Wolfram Sang" <wsa@kernel.org>,
"Arkadiusz Hiler" <ahiler@codeweavers.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Andy Lutomirski" <luto@kernel.org>,
linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org,
"Elizabeth Figura" <zfigura@codeweavers.com>
Subject: [RFC PATCH v2 15/29] ntsync: Introduce NTSYNC_IOC_EVENT_READ.
Date: Tue, 30 Jan 2024 20:13:42 -0600 [thread overview]
Message-ID: <20240131021356.10322-16-zfigura@codeweavers.com> (raw)
In-Reply-To: <20240131021356.10322-1-zfigura@codeweavers.com>
This corresponds to the NT syscall NtQueryEvent().
This returns the signaled state of the event and whether it is manual-reset.
Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
---
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 7f5f96ec7c69..5439c1c9e90f 100644
--- a/drivers/misc/ntsync.c
+++ b/drivers/misc/ntsync.c
@@ -546,6 +546,25 @@ static int ntsync_mutex_read(struct ntsync_obj *mutex, void __user *argp)
return ret;
}
+static int ntsync_event_read(struct ntsync_obj *event, void __user *argp)
+{
+ struct ntsync_event_args __user *user_args = argp;
+ struct ntsync_event_args args;
+
+ if (event->type != NTSYNC_TYPE_EVENT)
+ return -EINVAL;
+
+ args.event = 0;
+ spin_lock(&event->lock);
+ args.manual = event->u.event.manual;
+ args.signaled = event->u.event.signaled;
+ spin_unlock(&event->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 = file->private_data;
@@ -579,6 +598,8 @@ static long ntsync_obj_ioctl(struct file *file, unsigned int cmd,
return ntsync_event_reset(obj, argp);
case NTSYNC_IOC_EVENT_PULSE:
return ntsync_event_set(obj, argp, true);
+ case NTSYNC_IOC_EVENT_READ:
+ return ntsync_event_read(obj, argp);
default:
return -ENOIOCTLCMD;
}
diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h
index a1d0ef581212..582d33b0dcac 100644
--- a/include/uapi/linux/ntsync.h
+++ b/include/uapi/linux/ntsync.h
@@ -53,5 +53,6 @@ struct ntsync_wait_args {
#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)
+#define NTSYNC_IOC_EVENT_READ _IOR ('N', 0x8d, struct ntsync_event_args)
#endif
--
2.43.0
next prev parent reply other threads:[~2024-01-31 2:16 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-31 2:13 [RFC PATCH v2 00/29] NT synchronization primitive driver Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 01/29] ntsync: Introduce the ntsync driver and character device Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 02/29] ntsync: Introduce NTSYNC_IOC_CREATE_SEM Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 03/29] ntsync: Introduce NTSYNC_IOC_SEM_POST Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 04/29] ntsync: Introduce NTSYNC_IOC_WAIT_ANY Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 05/29] ntsync: Introduce NTSYNC_IOC_WAIT_ALL Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 06/29] ntsync: Introduce NTSYNC_IOC_CREATE_MUTEX Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 07/29] ntsync: Introduce NTSYNC_IOC_MUTEX_UNLOCK Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 08/29] ntsync: Introduce NTSYNC_IOC_MUTEX_KILL Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 09/29] ntsync: Introduce NTSYNC_IOC_CREATE_EVENT Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 10/29] ntsync: Introduce NTSYNC_IOC_EVENT_SET Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 11/29] ntsync: Introduce NTSYNC_IOC_EVENT_RESET Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 12/29] ntsync: Introduce NTSYNC_IOC_EVENT_PULSE Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 13/29] ntsync: Introduce NTSYNC_IOC_SEM_READ Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 14/29] ntsync: Introduce NTSYNC_IOC_MUTEX_READ Elizabeth Figura
2024-01-31 2:13 ` Elizabeth Figura [this message]
2024-01-31 2:13 ` [RFC PATCH v2 16/29] ntsync: Introduce alertable waits Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 17/29] selftests: ntsync: Add some tests for semaphore state Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 18/29] selftests: ntsync: Add some tests for mutex state Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 19/29] selftests: ntsync: Add some tests for NTSYNC_IOC_WAIT_ANY Elizabeth Figura
2024-01-31 8:52 ` Andi Kleen
2024-02-03 2:08 ` Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 20/29] selftests: ntsync: Add some tests for NTSYNC_IOC_WAIT_ALL Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 21/29] selftests: ntsync: Add some tests for wakeup signaling with WINESYNC_IOC_WAIT_ANY Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 22/29] selftests: ntsync: Add some tests for wakeup signaling with WINESYNC_IOC_WAIT_ALL Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 23/29] selftests: ntsync: Add some tests for manual-reset event state Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 24/29] selftests: ntsync: Add some tests for auto-reset " Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 25/29] selftests: ntsync: Add some tests for wakeup signaling with events Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 26/29] selftests: ntsync: Add tests for alertable waits Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 27/29] selftests: ntsync: Add some tests for wakeup signaling via alerts Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 28/29] maintainers: Add an entry for ntsync Elizabeth Figura
2024-01-31 2:13 ` [RFC PATCH v2 29/29] docs: ntsync: Add documentation for the ntsync uAPI Elizabeth Figura
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