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>,
"Elizabeth Figura" <zfigura@codeweavers.com>
Subject: [PATCH v3 10/30] ntsync: Introduce NTSYNC_IOC_EVENT_SET.
Date: Thu, 28 Mar 2024 19:06:01 -0500 [thread overview]
Message-ID: <20240329000621.148791-11-zfigura@codeweavers.com> (raw)
In-Reply-To: <20240329000621.148791-1-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:[~2024-03-29 0:23 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-29 0:05 [PATCH v3 00/30] NT synchronization primitive driver Elizabeth Figura
2024-03-29 0:05 ` [PATCH v3 01/30] ntsync: Introduce the ntsync driver and character device Elizabeth Figura
2024-03-29 0:05 ` [PATCH v3 02/30] ntsync: Introduce NTSYNC_IOC_CREATE_SEM Elizabeth Figura
2024-03-29 0:05 ` [PATCH v3 03/30] ntsync: Introduce NTSYNC_IOC_SEM_POST Elizabeth Figura
2024-04-11 13:35 ` Greg Kroah-Hartman
2024-03-29 0:05 ` [PATCH v3 04/30] ntsync: Introduce NTSYNC_IOC_WAIT_ANY Elizabeth Figura
2024-04-11 13:34 ` Greg Kroah-Hartman
2024-04-12 0:33 ` Elizabeth Figura
2024-04-12 6:16 ` Greg Kroah-Hartman
2024-03-29 0:05 ` [PATCH v3 05/30] ntsync: Introduce NTSYNC_IOC_WAIT_ALL Elizabeth Figura
2024-03-29 0:05 ` [PATCH v3 06/30] ntsync: Introduce NTSYNC_IOC_CREATE_MUTEX Elizabeth Figura
2024-03-29 0:05 ` [PATCH v3 07/30] ntsync: Introduce NTSYNC_IOC_MUTEX_UNLOCK Elizabeth Figura
2024-03-29 0:05 ` [PATCH v3 08/30] ntsync: Introduce NTSYNC_IOC_MUTEX_KILL Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 09/30] ntsync: Introduce NTSYNC_IOC_CREATE_EVENT Elizabeth Figura
2024-03-29 0:06 ` Elizabeth Figura [this message]
2024-03-29 0:06 ` [PATCH v3 11/30] ntsync: Introduce NTSYNC_IOC_EVENT_RESET Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 12/30] ntsync: Introduce NTSYNC_IOC_EVENT_PULSE Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 13/30] ntsync: Introduce NTSYNC_IOC_SEM_READ Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 14/30] ntsync: Introduce NTSYNC_IOC_MUTEX_READ Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 15/30] ntsync: Introduce NTSYNC_IOC_EVENT_READ Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 16/30] ntsync: Introduce alertable waits Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 17/30] selftests: ntsync: Add some tests for semaphore state Elizabeth Figura
2024-03-29 20:07 ` Muhammad Usama Anjum
2024-03-29 0:06 ` [PATCH v3 18/30] selftests: ntsync: Add some tests for mutex state Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 19/30] selftests: ntsync: Add some tests for NTSYNC_IOC_WAIT_ANY Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 20/30] selftests: ntsync: Add some tests for NTSYNC_IOC_WAIT_ALL Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 21/30] selftests: ntsync: Add some tests for wakeup signaling with WINESYNC_IOC_WAIT_ANY Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 22/30] selftests: ntsync: Add some tests for wakeup signaling with WINESYNC_IOC_WAIT_ALL Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 23/30] selftests: ntsync: Add some tests for manual-reset event state Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 24/30] selftests: ntsync: Add some tests for auto-reset " Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 25/30] selftests: ntsync: Add some tests for wakeup signaling with events Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 26/30] selftests: ntsync: Add tests for alertable waits Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 27/30] selftests: ntsync: Add some tests for wakeup signaling via alerts Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 28/30] selftests: ntsync: Add a stress test for contended waits Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 29/30] maintainers: Add an entry for ntsync Elizabeth Figura
2024-03-29 0:06 ` [PATCH v3 30/30] docs: ntsync: Add documentation for the ntsync uAPI Elizabeth Figura
2024-04-12 5:52 ` Bagas Sanjaya
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240329000621.148791-11-zfigura@codeweavers.com \
--to=zfigura@codeweavers.com \
--cc=ahiler@codeweavers.com \
--cc=andrealmeid@igalia.com \
--cc=arnd@arndb.de \
--cc=corbet@lwn.net \
--cc=gregkh@linuxfoundation.org \
--cc=linux-api@vger.kernel.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=luto@kernel.org \
--cc=peterz@infradead.org \
--cc=rdunlap@infradead.org \
--cc=shuah@kernel.org \
--cc=wine-devel@winehq.org \
--cc=wsa@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).