67 lines
2.0 KiB
Diff
67 lines
2.0 KiB
Diff
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From 35ff252f99aa4002e0c2ecef37314a422969791b 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 15:24:38 -0500
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Subject: ntsync: Introduce NTSYNC_IOC_EVENT_READ.
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This corresponds to the NT syscall NtQueryEvent().
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This returns the signaled state of the event and whether it is manual-reset.
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Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
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---
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drivers/misc/ntsync.c | 26 ++++++++++++++++++++++++++
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include/uapi/linux/ntsync.h | 1 +
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2 files changed, 27 insertions(+)
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--- a/drivers/misc/ntsync.c
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+++ b/drivers/misc/ntsync.c
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@@ -633,6 +633,30 @@ static int ntsync_mutex_read(struct ntsy
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return ret;
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}
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+static int ntsync_event_read(struct ntsync_obj *event, void __user *argp)
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+{
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+ struct ntsync_event_args __user *user_args = argp;
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+ struct ntsync_device *dev = event->dev;
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+ struct ntsync_event_args args;
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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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+ args.event = 0;
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+
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+ all = ntsync_lock_obj(dev, event);
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+
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+ args.manual = event->u.event.manual;
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+ args.signaled = event->u.event.signaled;
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+
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+ ntsync_unlock_obj(dev, event, all);
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+
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+ if (copy_to_user(user_args, &args, sizeof(args)))
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+ return -EFAULT;
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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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@@ -666,6 +690,8 @@ static long ntsync_obj_ioctl(struct file
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return ntsync_event_reset(obj, argp);
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case NTSYNC_IOC_EVENT_PULSE:
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return ntsync_event_set(obj, argp, true);
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+ case NTSYNC_IOC_EVENT_READ:
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+ return ntsync_event_read(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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@@ -56,5 +56,6 @@ struct ntsync_wait_args {
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#define NTSYNC_IOC_EVENT_PULSE _IOR ('N', 0x8a, __u32)
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#define NTSYNC_IOC_SEM_READ _IOR ('N', 0x8b, struct ntsync_sem_args)
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#define NTSYNC_IOC_MUTEX_READ _IOR ('N', 0x8c, struct ntsync_mutex_args)
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+#define NTSYNC_IOC_EVENT_READ _IOR ('N', 0x8d, struct ntsync_event_args)
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#endif
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