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,
"Randy Dunlap" <rdunlap@infradead.org>,
"Ingo Molnar" <mingo@redhat.com>, "Will Deacon" <will@kernel.org>,
"Waiman Long" <longman@redhat.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Elizabeth Figura" <zfigura@codeweavers.com>
Subject: [PATCH v4 07/27] ntsync: Introduce NTSYNC_IOC_EVENT_SET.
Date: Mon, 15 Apr 2024 20:08:17 -0500 [thread overview]
Message-ID: <20240416010837.333694-8-zfigura@codeweavers.com> (raw)
In-Reply-To: <20240416010837.333694-1-zfigura@codeweavers.com>
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 <zfigura@codeweavers.com>
---
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
--
2.43.0
next prev parent reply other threads:[~2024-04-16 1:10 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-16 1:08 [PATCH v4 00/30] NT synchronization primitive driver Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 01/27] ntsync: Introduce NTSYNC_IOC_WAIT_ANY Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 02/27] ntsync: Introduce NTSYNC_IOC_WAIT_ALL Elizabeth Figura
2024-04-17 11:37 ` Peter Zijlstra
2024-04-17 20:03 ` Elizabeth Figura
2024-04-18 9:35 ` Peter Zijlstra
2024-04-19 16:28 ` Peter Zijlstra
2024-05-14 4:15 ` Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 03/27] ntsync: Introduce NTSYNC_IOC_CREATE_MUTEX Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 04/27] ntsync: Introduce NTSYNC_IOC_MUTEX_UNLOCK Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 05/27] ntsync: Introduce NTSYNC_IOC_MUTEX_KILL Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 06/27] ntsync: Introduce NTSYNC_IOC_CREATE_EVENT Elizabeth Figura
2024-04-16 1:08 ` Elizabeth Figura [this message]
2024-04-16 1:08 ` [PATCH v4 08/27] ntsync: Introduce NTSYNC_IOC_EVENT_RESET Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 09/27] ntsync: Introduce NTSYNC_IOC_EVENT_PULSE Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 10/27] ntsync: Introduce NTSYNC_IOC_SEM_READ Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 11/27] ntsync: Introduce NTSYNC_IOC_MUTEX_READ Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 12/27] ntsync: Introduce NTSYNC_IOC_EVENT_READ Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 13/27] ntsync: Introduce alertable waits Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 14/27] selftests: ntsync: Add some tests for semaphore state Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 15/27] selftests: ntsync: Add some tests for mutex state Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 16/27] selftests: ntsync: Add some tests for NTSYNC_IOC_WAIT_ANY Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 17/27] selftests: ntsync: Add some tests for NTSYNC_IOC_WAIT_ALL Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 18/27] selftests: ntsync: Add some tests for wakeup signaling with WINESYNC_IOC_WAIT_ANY Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 19/27] selftests: ntsync: Add some tests for wakeup signaling with WINESYNC_IOC_WAIT_ALL Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 20/27] selftests: ntsync: Add some tests for manual-reset event state Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 21/27] selftests: ntsync: Add some tests for auto-reset " Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 22/27] selftests: ntsync: Add some tests for wakeup signaling with events Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 23/27] selftests: ntsync: Add tests for alertable waits Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 24/27] selftests: ntsync: Add some tests for wakeup signaling via alerts Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 25/27] selftests: ntsync: Add a stress test for contended waits Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 26/27] maintainers: Add an entry for ntsync Elizabeth Figura
2024-04-16 1:08 ` [PATCH v4 27/27] docs: ntsync: Add documentation for the ntsync uAPI Elizabeth Figura
2024-04-16 2:13 ` Randy Dunlap
2024-04-16 8:14 ` [PATCH v4 00/30] NT synchronization primitive driver Peter Zijlstra
2024-04-16 8:49 ` Greg Kroah-Hartman
2024-04-16 15:50 ` Peter Zijlstra
2024-04-16 15:53 ` Peter Zijlstra
2024-04-16 16:19 ` Peter Zijlstra
2024-04-16 21:18 ` Elizabeth Figura
2024-04-17 5:21 ` Peter Zijlstra
2024-04-16 21:18 ` Elizabeth Figura
2024-04-16 22:18 ` Elizabeth Figura
2024-04-19 16:16 ` Peter Zijlstra
2024-04-19 20:46 ` Elizabeth Figura
2024-05-07 0:40 ` Elizabeth Figura
2024-05-07 0:50 ` Elizabeth Figura
2024-04-17 5:24 ` Peter Zijlstra
2024-04-16 16:05 ` Peter Zijlstra
2024-04-16 21:18 ` Elizabeth Figura
2024-04-17 5:22 ` Peter Zijlstra
2024-04-17 6:05 ` Elizabeth Figura
2024-04-17 10:01 ` Peter Zijlstra
2024-04-17 20:02 ` Elizabeth Figura
2024-05-15 23:32 ` Elizabeth Figura
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