git: 746c374aa94b - main - evdev: add devnum sysctl

The branch main has been updated by kevans:

URL: https://cgit.FreeBSD.org/src/commit/?id=746c374aa94b46712e6defb3ab56dd2d6ad8db64

commit 746c374aa94b46712e6defb3ab56dd2d6ad8db64
Author:     Quentin Thébault <quentin.thebault@defenso.fr>
AuthorDate: 2026-06-14 16:34:51 +0000
Commit:     Kyle Evans <kevans@FreeBSD.org>
CommitDate: 2026-06-14 16:34:51 +0000

    evdev: add devnum sysctl
    
    Add a sysctl entry for the evdev device number (devnum) to allow
    libudev-devd to populate the corresponding device information
    fields (MAJOR and MINOR) when running in a jail with no input devices
    exposed through devfs.
    
    Signed-off-by: Quentin Thébault <quentin.thebault@defenso.fr>
    
    Reviewed by:    wulf
    Sponsored by:   Defenso
    MFC after:      3 days
    Differential Revision:  https://reviews.freebsd.org/D56968
---
 sys/dev/evdev/evdev.c         | 6 ++++++
 sys/dev/evdev/evdev_private.h | 1 +
 2 files changed, 7 insertions(+)

diff --git a/sys/dev/evdev/evdev.c b/sys/dev/evdev/evdev.c
index 4dcd6f23d338..b8628d570a3c 100644
--- a/sys/dev/evdev/evdev.c
+++ b/sys/dev/evdev/evdev.c
@@ -283,6 +283,11 @@ evdev_sysctl_create(struct evdev_dev *evdev)
 	    SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "sw_bits", CTLFLAG_RD,
 	    evdev->ev_sw_flags, sizeof(evdev->ev_sw_flags), "",
 	    "Input device supported switch events");
+
+	SYSCTL_ADD_U64(&evdev->ev_sysctl_ctx,
+	    SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "devnum", CTLFLAG_RD,
+	    &evdev->ev_devnum, 0,
+	    "Input device number");
 }
 
 static int
@@ -328,6 +333,7 @@ evdev_register_common(struct evdev_dev *evdev)
 	ret = evdev_cdev_create(evdev);
 	if (ret != 0)
 		goto bail_out;
+	evdev->ev_devnum = dev2udev(evdev->ev_cdev);
 
 	/* Create sysctls (for device enumeration without /dev/input access rights) */
 	evdev_sysctl_create(evdev);
diff --git a/sys/dev/evdev/evdev_private.h b/sys/dev/evdev/evdev_private.h
index 4c371e538598..65da48745dc9 100644
--- a/sys/dev/evdev/evdev_private.h
+++ b/sys/dev/evdev/evdev_private.h
@@ -114,6 +114,7 @@ struct evdev_dev
 	uid_t			ev_cdev_uid;
 	gid_t			ev_cdev_gid;
 	int			ev_cdev_mode;
+	dev_t			ev_devnum;
 	int			ev_unit;
 	enum evdev_lock_type	ev_lock_type;
 	struct mtx *		ev_state_lock;	/* State lock */