doc: add information on ospf debug settings

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

doc/ChangeLog.md

@@ -3,6 +3,13 @@ Change Log
 
 All notable changes to the project are documented in this file.
 
+[v25.11.0][UNRELEASED] - 
+-------------------------
+
+### Fixes
+
+- #1281: Remove debug from OSPF log and make it configured instead
+
 [v25.11.0][] - 2025-12-02
 -------------------------
 

doc/networking.md

@@ -1502,6 +1502,48 @@ routes`.
 
     admin@example:/>
 
+For more detailed troubleshooting, OSPF debug logging can be enabled to
+capture specific protocol events. Debug messages are written to the
+routing log file (`/var/log/routing`).
+
+> [!CAUTION]
+> Debug logging significantly increases log output and may impact
+> performance. Only enable debug categories needed for troubleshooting,
+> and disable them when done.
+
+To enable specific OSPF debug categories:
+
+    admin@example:/> configure
+    admin@example:/config/> edit routing control-plane-protocol ospfv2 name default ospf debug
+    admin@example:/config/routing/…/ospf/debug/> set bfd true
+    admin@example:/config/routing/…/ospf/debug/> set nsm true
+    admin@example:/config/routing/…/ospf/debug/> leave
+    admin@example:/>
+
+Available debug categories include:
+
+- `bfd`: BFD (Bidirectional Forwarding Detection) events
+- `packet`: Detailed packet debugging (all OSPF packets)
+- `ism`: Interface State Machine events
+- `nsm`: Neighbor State Machine events
+- `default-information`: Default route origination
+- `nssa`: Not-So-Stubby Area events
+
+All debug options are disabled by default. Refer to the `infix-routing`
+YANG model for the complete list of available debug options.
+
+To view current debug settings:
+
+    admin@example:/> show running-config routing control-plane-protocol
+
+To disable all debug logging, simply delete the debug settings or set
+all options back to `false`:
+
+    admin@example:/> configure
+    admin@example:/config/> delete routing control-plane-protocol ospfv2 name default ospf debug
+    admin@example:/config/> leave
+    admin@example:/>
+
 
 ### View routing table
 

src/confd/src/routing.c

@@ -133,15 +133,7 @@ int parse_ospf_areas(sr_session_ctx_t *session, struct lyd_node *areas, FILE *fp
 
 int parse_ospf(sr_session_ctx_t *session, struct lyd_node *ospf)
 {
-	const char *static_debug = "! OSPF default debug\
-debug ospf bfd\n\
-debug ospf packet all detail\n\
-debug ospf ism\n\
-debug ospf nsm\n\
-debug ospf default-information\n\
-debug ospf nssa\n\
-! OSPF configuration\n";
-	struct lyd_node *areas, *default_route;
+	struct lyd_node *areas, *default_route, *debug;
 	const char *router_id;
 	int bfd_enabled = 0;
 	int num_areas = 0;
@@ -154,7 +146,40 @@ debug ospf nssa\n\
 	}
 
 	fputs(FRR_STATIC_CONFIG, fp);
-	fputs(static_debug, fp);
+
+	/* Handle OSPF debug configuration */
+	debug = lydx_get_child(ospf, "debug");
+	if (debug) {
+		int any_debug = 0;
+
+		if (lydx_get_bool(debug, "bfd")) {
+			fputs("debug ospf bfd\n", fp);
+			any_debug = 1;
+		}
+		if (lydx_get_bool(debug, "packet")) {
+			fputs("debug ospf packet all detail\n", fp);
+			any_debug = 1;
+		}
+		if (lydx_get_bool(debug, "ism")) {
+			fputs("debug ospf ism\n", fp);
+			any_debug = 1;
+		}
+		if (lydx_get_bool(debug, "nsm")) {
+			fputs("debug ospf nsm\n", fp);
+			any_debug = 1;
+		}
+		if (lydx_get_bool(debug, "default-information")) {
+			fputs("debug ospf default-information\n", fp);
+			any_debug = 1;
+		}
+		if (lydx_get_bool(debug, "nssa")) {
+			fputs("debug ospf nssa\n", fp);
+			any_debug = 1;
+		}
+
+		if (any_debug)
+			fputs("!\n", fp);
+	}
 
 	areas = lydx_get_child(ospf, "areas");
 	router_id = lydx_get_cattr(ospf, "explicit-router-id");

src/confd/yang/confd.inc

@@ -26,7 +26,7 @@ MODULES=(
 	"ieee802-dot1q-types@2022-10-29.yang"
 	"infix-ip@2025-11-02.yang"
 	"infix-if-type@2025-02-12.yang"
-	"infix-routing@2025-11-12.yang"
+	"infix-routing@2025-12-02.yang"
 	"ieee802-dot1ab-lldp@2022-03-15.yang"
 	"infix-lldp@2025-05-05.yang"
 	"infix-dhcp-common@2025-11-09.yang"

src/confd/yang/confd/infix-routing.yang

@@ -23,6 +23,14 @@ module infix-routing {
   contact      "kernelkit@googlegroups.com";
   description  "Deviations and augments for ietf-routing and ietf-ospf.";
 
+  revision 2025-12-02 {
+    description "Add configurable OSPF debug logging container.
+                 Allows users to enable specific OSPF debug categories
+                 (bfd, packet, ism, nsm, default-information, nssa) for troubleshooting.
+                 All debug options default to disabled to prevent log flooding.";
+    reference "Issue #1281";
+  }
+
   revision 2025-11-12 {
     description "Add area-id augmentation to OSPF local-rib routes.
                  Add uptime, role, and interface-name augmentations to OSPF neighbor state.
@@ -306,6 +314,45 @@ module infix-routing {
       }
     }
   }
+  augment "/rt:routing/rt:control-plane-protocols/rt:control-plane-protocol/ospf:ospf" {
+    description "Add support for configurable OSPF debug logging.
+                 Allows users to enable specific OSPF debug categories for troubleshooting.
+                 All debug options default to disabled to prevent log flooding in
+                 production environments.";
+    container debug {
+      description "OSPF debug logging configuration";
+      leaf bfd {
+        type boolean;
+        default false;
+        description "Enable OSPF BFD (Bidirectional Forwarding Detection) debug messages";
+      }
+      leaf packet {
+        type boolean;
+        default false;
+        description "Enable detailed OSPF packet debug messages (all packet types)";
+      }
+      leaf ism {
+        type boolean;
+        default false;
+        description "Enable OSPF Interface State Machine debug messages";
+      }
+      leaf nsm {
+        type boolean;
+        default false;
+        description "Enable OSPF Neighbor State Machine debug messages";
+      }
+      leaf default-information {
+        type boolean;
+        default false;
+        description "Enable OSPF default route origination debug messages";
+      }
+      leaf nssa {
+        type boolean;
+        default false;
+        description "Enable OSPF NSSA (Not-So-Stubby Area) debug messages";
+      }
+    }
+  }
   deviation "/rt:routing/rt:control-plane-protocols/rt:control-plane-protocol/ospf:ospf/ospf:areas/ospf:area/ospf:interfaces/ospf:interface" {
     deviate add {
       must "count(../../../../ospf:areas/ospf:area/ospf:interfaces/ospf:interface[ospf:name=current()/name]) <= 1" {