65 lines
1.9 KiB
Diff
65 lines
1.9 KiB
Diff
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From aa3ebb5870eb9ed259aba2ed4e07e9993e6cd978 Mon Sep 17 00:00:00 2001
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From: Elizabeth Figura <zfigura@codeweavers.com>
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Date: Sun, 19 May 2024 15:24:34 -0500
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Subject: ntsync: Introduce NTSYNC_IOC_EVENT_RESET.
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This corresponds to the NT syscall NtResetEvent().
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This sets the event to the unsignaled state, and returns its previous state.
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Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
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---
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drivers/misc/ntsync.c | 24 ++++++++++++++++++++++++
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include/uapi/linux/ntsync.h | 1 +
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2 files changed, 25 insertions(+)
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--- a/drivers/misc/ntsync.c
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+++ b/drivers/misc/ntsync.c
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@@ -559,6 +559,28 @@ static int ntsync_event_set(struct ntsyn
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return 0;
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}
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+static int ntsync_event_reset(struct ntsync_obj *event, void __user *argp)
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+{
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+ struct ntsync_device *dev = event->dev;
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+ __u32 prev_state;
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+ bool all;
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+
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+ if (event->type != NTSYNC_TYPE_EVENT)
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+ return -EINVAL;
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+
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+ all = ntsync_lock_obj(dev, event);
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+
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+ prev_state = event->u.event.signaled;
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+ event->u.event.signaled = false;
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+
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+ ntsync_unlock_obj(dev, event, all);
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+
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+ if (put_user(prev_state, (__u32 __user *)argp))
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+ return -EFAULT;
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+
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+ return 0;
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+}
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+
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static int ntsync_obj_release(struct inode *inode, struct file *file)
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{
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struct ntsync_obj *obj = file->private_data;
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@@ -584,6 +606,8 @@ static long ntsync_obj_ioctl(struct file
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return ntsync_mutex_kill(obj, argp);
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case NTSYNC_IOC_EVENT_SET:
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return ntsync_event_set(obj, argp);
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+ case NTSYNC_IOC_EVENT_RESET:
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+ return ntsync_event_reset(obj, argp);
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default:
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return -ENOIOCTLCMD;
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}
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--- a/include/uapi/linux/ntsync.h
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+++ b/include/uapi/linux/ntsync.h
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@@ -52,5 +52,6 @@ struct ntsync_wait_args {
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#define NTSYNC_IOC_MUTEX_UNLOCK _IOWR('N', 0x85, struct ntsync_mutex_args)
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#define NTSYNC_IOC_MUTEX_KILL _IOW ('N', 0x86, __u32)
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#define NTSYNC_IOC_EVENT_SET _IOR ('N', 0x88, __u32)
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+#define NTSYNC_IOC_EVENT_RESET _IOR ('N', 0x89, __u32)
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#endif
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