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authorNeale Ranns <nranns@cisco.com>2017-04-05 08:11:14 -0700
committerDamjan Marion <dmarion.lists@gmail.com>2017-04-06 15:18:44 +0000
commit88fc83eb716bf07f4634de6de5b569f795a56418 (patch)
tree4c8037b62cb6a57209aef4e28ae273d0ba4e40e7 /src/vnet/fib/fib_entry_delegate.c
parent5ee51f8ed616f14f3b32ae8857d383fefa02d861 (diff)
BFD-FIB interactions
- single-hop BFD: attach a delegate to the appropriate adjacency - multi-hop BFD [not supported yet]: attach a delegate to the FIB entry. adjacency/fib_entry state tracks the BFD session state. when the state is down the object does not contribute forwarding hence and hence dependent objects will not use it. For example, if a route is ECMP via two adjacencies and one of them is BFD down, then only the other is used to forward (i.e. we don't drop half the traffic). Change-Id: I0ef53e20e73b067001a132cd0a3045408811a822 Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/fib/fib_entry_delegate.c')
-rw-r--r--src/vnet/fib/fib_entry_delegate.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/src/vnet/fib/fib_entry_delegate.c b/src/vnet/fib/fib_entry_delegate.c
index 70840b160a1..41af14f2245 100644
--- a/src/vnet/fib/fib_entry_delegate.c
+++ b/src/vnet/fib/fib_entry_delegate.c
@@ -15,6 +15,7 @@
#include <vnet/fib/fib_entry_delegate.h>
#include <vnet/fib/fib_entry.h>
+#include <vnet/fib/fib_attached_export.h>
static fib_entry_delegate_t *
fib_entry_delegate_find_i (const fib_entry_t *fib_entry,
@@ -149,8 +150,107 @@ fib_entry_delegate_type_to_chain_type (fib_entry_delegate_type_t fdt)
case FIB_ENTRY_DELEGATE_COVERED:
case FIB_ENTRY_DELEGATE_ATTACHED_IMPORT:
case FIB_ENTRY_DELEGATE_ATTACHED_EXPORT:
+ case FIB_ENTRY_DELEGATE_BFD:
break;
}
ASSERT(0);
return (FIB_FORW_CHAIN_TYPE_UNICAST_IP4);
}
+
+/**
+ * typedef for printing a delegate
+ */
+typedef u8 * (*fib_entry_delegate_format_t)(const fib_entry_delegate_t *fed,
+ u8 *s);
+
+/**
+ * Print a delegate that represents a forwarding chain
+ */
+static u8 *
+fib_entry_delegate_fmt_fwd_chain (const fib_entry_delegate_t *fed,
+ u8 *s)
+{
+ s = format(s, "%U-chain\n %U",
+ format_fib_forw_chain_type,
+ fib_entry_delegate_type_to_chain_type(fed->fd_type),
+ format_dpo_id, &fed->fd_dpo, 2);
+
+ return (s);
+}
+
+/**
+ * Print a delegate that represents cover tracking
+ */
+static u8 *
+fib_entry_delegate_fmt_covered (const fib_entry_delegate_t *fed,
+ u8 *s)
+{
+ s = format(s, "covered:[");
+ s = fib_node_children_format(fed->fd_list, s);
+ s = format(s, "]");
+
+ return (s);
+}
+
+/**
+ * Print a delegate that represents attached-import tracking
+ */
+static u8 *
+fib_entry_delegate_fmt_import (const fib_entry_delegate_t *fed,
+ u8 *s)
+{
+ s = format(s, "import:%U", fib_ae_import_format, fed->fd_index);
+
+ return (s);
+}
+
+/**
+ * Print a delegate that represents attached-export tracking
+ */
+static u8 *
+fib_entry_delegate_fmt_export (const fib_entry_delegate_t *fed,
+ u8 *s)
+{
+ s = format(s, "export:%U", fib_ae_export_format, fed->fd_index);
+
+ return (s);
+}
+
+/**
+ * Print a delegate that represents BFD tracking
+ */
+static u8 *
+fib_entry_delegate_fmt_bfd (const fib_entry_delegate_t *fed,
+ u8 *s)
+{
+ s = format(s, "BFD:%d", fed->fd_bfd_state);
+
+ return (s);
+}
+
+/**
+ * A delegate type to formatter map
+ */
+static fib_entry_delegate_format_t fed_formatters[] =
+{
+ [FIB_ENTRY_DELEGATE_CHAIN_UNICAST_IP4] = fib_entry_delegate_fmt_fwd_chain,
+ [FIB_ENTRY_DELEGATE_CHAIN_UNICAST_IP6] = fib_entry_delegate_fmt_fwd_chain,
+ [FIB_ENTRY_DELEGATE_CHAIN_MPLS_EOS] = fib_entry_delegate_fmt_fwd_chain,
+ [FIB_ENTRY_DELEGATE_CHAIN_MPLS_NON_EOS] = fib_entry_delegate_fmt_fwd_chain,
+ [FIB_ENTRY_DELEGATE_CHAIN_ETHERNET] = fib_entry_delegate_fmt_fwd_chain,
+ [FIB_ENTRY_DELEGATE_CHAIN_NSH] = fib_entry_delegate_fmt_fwd_chain,
+ [FIB_ENTRY_DELEGATE_COVERED] = fib_entry_delegate_fmt_covered,
+ [FIB_ENTRY_DELEGATE_ATTACHED_IMPORT] = fib_entry_delegate_fmt_import,
+ [FIB_ENTRY_DELEGATE_ATTACHED_EXPORT] = fib_entry_delegate_fmt_export,
+ [FIB_ENTRY_DELEGATE_BFD] = fib_entry_delegate_fmt_bfd,
+};
+
+u8 *
+format_fib_entry_deletegate (u8 * s, va_list * args)
+{
+ fib_entry_delegate_t *fed;
+
+ fed = va_arg (*args, fib_entry_delegate_t *);
+
+ return (fed_formatters[fed->fd_type](fed, s));
+}