From dc45a00eac35a2e66c3ddba6e52e2b2280bd2be0 Mon Sep 17 00:00:00 2001
From: Gordon Tetlow <gordon@tetlows.org>
Date: Tue, 7 Nov 2023 13:21:56 -0800
Subject: [PATCH] Add kern.features.zfs

Add a ZFS feature flag to indicate OpenZFS availability.

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Gordon Tetlow <gordon@freebsd.org>
Closes #15484
---
 module/os/freebsd/zfs/kmod_core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/module/os/freebsd/zfs/kmod_core.c b/module/os/freebsd/zfs/kmod_core.c
index 9a26857352..00c1acf577 100644
--- a/module/os/freebsd/zfs/kmod_core.c
+++ b/module/os/freebsd/zfs/kmod_core.c
@@ -65,6 +65,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/spa_impl.h>
 #include <sys/stat.h>
 #include <sys/sunddi.h>
+#include <sys/sysctl.h>
 #include <sys/systm.h>
 #include <sys/taskqueue.h>
 #include <sys/uio.h>
@@ -336,6 +337,8 @@ static moduledata_t zfs_mod = {
 EVENTHANDLER_DEFINE(mountroot, spa_boot_init, NULL, 0);
 #endif
 
+FEATURE(zfs, "OpenZFS support");
+
 DECLARE_MODULE(zfsctrl, zfs_mod, SI_SUB_CLOCKS, SI_ORDER_ANY);
 MODULE_VERSION(zfsctrl, 1);
 #if __FreeBSD_version > 1300092