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authorAlexander Chernavin <achernavin@netgate.com>2022-03-02 16:12:49 +0000
committerMatthew Smith <mgsmith@netgate.com>2022-03-25 13:15:21 +0000
commitd373ebef012b1fe94c3df0b92e8c27f90cf782f9 (patch)
treeb288f3948ce2a65cf7794854f00429561556cfb7 /src/plugins/linux-cp/lcp.h
parentd545f04d3c29d53983b442be7cbfc14eed9280c3 (diff)
linux-cp: handle ipv4 routes when link goes down
Type: improvement Currently, when the link goes down on an interface, routes that resolve through that interface and created with Nexthop API are removed by the kernel. However, IPv4 routes remain in the FIB because the kernel doesn't send any notifications about that. And for the plugin working with user-space applications that create routes in the kernel using Nexthop API there should be a mechanism to synchronize the FIB and the kernel in this case. With this change, add two new startup configuration options to the plugin to be able to control what should happen with static and dynamic routes managed by the plugin on link down: - del-static-on-link-down (disabled by default, delete routes created with the linux-cp static FIB source on link down), - del-dynamic-on-link-down (disabled by default, delete routes created with the linux-cp dynamic FIB source on link down). Then, monitor link state changes on interfaces for which a linux-cp pair exists. If the link goes down on one of the interfaces, process routes that resolve through that interface according to the new configurations. Signed-off-by: Alexander Chernavin <achernavin@netgate.com> Change-Id: I0fbaeeca3f3d1fcd22e8eebb08a0a4a3d0dfe5b8
Diffstat (limited to 'src/plugins/linux-cp/lcp.h')
-rw-r--r--src/plugins/linux-cp/lcp.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/src/plugins/linux-cp/lcp.h b/src/plugins/linux-cp/lcp.h
index 14c1a6e2a75..4ddaa3898d6 100644
--- a/src/plugins/linux-cp/lcp.h
+++ b/src/plugins/linux-cp/lcp.h
@@ -26,6 +26,8 @@ typedef struct lcp_main_s
int default_ns_fd;
u8 lcp_auto_subint; /* Automatically create/delete LCP sub-interfaces */
u8 lcp_sync; /* Automatically sync VPP changes to LCP */
+ u8 del_static_on_link_down; /* Delete static routes when link goes down */
+ u8 del_dynamic_on_link_down; /* Delete dynamic routes when link goes down */
u8 test_mode; /* Set when Unit testing */
} lcp_main_t;
@@ -38,6 +40,18 @@ int lcp_set_default_ns (u8 *ns);
u8 *lcp_get_default_ns (void); /* Returns NULL or shared string */
int lcp_get_default_ns_fd (void);
+/**
+ * Get/Set whether to delete static routes when the link goes down.
+ */
+void lcp_set_del_static_on_link_down (u8 is_del);
+u8 lcp_get_del_static_on_link_down (void);
+
+/**
+ * Get/Set whether to delete dynamic routes when the link goes down.
+ */
+void lcp_set_del_dynamic_on_link_down (u8 is_del);
+u8 lcp_get_del_dynamic_on_link_down (void);
+
#endif
/*