git: 58ca52f752a8 - stable/12 - Add FEATURE sysctls for ALTQ disciplines

[Kristof Provost]

The branch stable/12 has been updated by kp:

URL: https://cgit.FreeBSD.org/src/commit/?id=58ca52f752a81cd670e3f7fc6f300c5667ffe4b3

commit 58ca52f752a81cd670e3f7fc6f300c5667ffe4b3
Author:     Kristof Provost <kp at FreeBSD.org>
AuthorDate: 2021-01-23 09:36:33 +0000
Commit:     Kristof Provost <kp at FreeBSD.org>
CommitDate: 2021-07-31 09:12:51 +0000

    Add FEATURE sysctls for ALTQ disciplines
    
    This will allow userspace to more easily figure out if ALTQ is built
    into the kernel and what disciplines are supported.
    
    Reviewed by:            donner@
    Differential Revision:  https://reviews.freebsd.org/D28302
    
    (cherry picked from commit e111d79806fe3652bc85593ca77ee1b4ff85498d)
---
 sys/net/altq/altq_subr.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/sys/net/altq/altq_subr.c b/sys/net/altq/altq_subr.c
index 01aa1efef53d..f28a4383364a 100644
--- a/sys/net/altq/altq_subr.c
+++ b/sys/net/altq/altq_subr.c
@@ -117,6 +117,38 @@ static struct ip4_frag	*ip4f_alloc(void);
 static void 	ip4f_free(struct ip4_frag *);
 #endif /* ALTQ3_CLFIER_COMPAT */
 
+#ifdef ALTQ
+SYSCTL_NODE(_kern_features, OID_AUTO, altq, CTLFLAG_RD | CTLFLAG_CAPRD, 0,
+    "ALTQ packet queuing");
+
+#define	ALTQ_FEATURE(name, desc)					\
+	SYSCTL_INT_WITH_LABEL(_kern_features_altq, OID_AUTO, name,	\
+	    CTLFLAG_RD | CTLFLAG_CAPRD, SYSCTL_NULL_INT_PTR, 1,		\
+	    desc, "feature")
+
+#ifdef ALTQ_CBQ
+ALTQ_FEATURE(cbq, "ATLQ Class Based Queuing discipline");
+#endif
+#ifdef ALTQ_CODEL
+ALTQ_FEATURE(codel, "ALTQ Controlled Delay discipline");
+#endif
+#ifdef ALTQ_RED
+ALTQ_FEATURE(red, "ALTQ Random Early Detection discipline");
+#endif
+#ifdef ALTQ_RIO
+ALTQ_FEATURE(rio, "ALTQ Random Early Drop discipline");
+#endif
+#ifdef ALTQ_HFSC
+ALTQ_FEATURE(hfsc, "ALTQ Hierarchical Packet Scheduler discipline");
+#endif
+#ifdef ALTQ_PRIQ
+ALTQ_FEATURE(priq, "ATLQ Priority Queuing discipline");
+#endif
+#ifdef ALTQ_FAIRQ
+ALTQ_FEATURE(fairq, "ALTQ Fair Queuing discipline");
+#endif
+#endif
+
 /*
  * alternate queueing support routines
  */