linux-cp: Linux Interface Mirroring for Control Plane Integration

Type: feature

please see FEATURE.yaml for details.

Signed-off-by: Neale Ranns <nranns@cisco.com>
Signed-off-by: Matthew Smith <mgsmith@netgate.com>
Signed-off-by: Jon Loeliger <jdl@netgate.com>
Signed-off-by: Pim van Pelt <pim@ipng.nl>
Change-Id: I04a45c15c0838906aa787e06660fa29f39f755fa

1 files changed, 160 insertions, 0 deletions

diff --git a/src/plugins/linux-cp/lcp_interface.h b/src/plugins/linux-cp/lcp_interface.h
new file mode 100644
index 00000000000..d2f19e8481b
--- /dev/null
+++ b/src/plugins/linux-cp/lcp_interface.h
@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef __LCP_ITF_PAIR_H__
+#define __LCP_ITF_PAIR_H__
+
+#include <vnet/dpo/dpo.h>
+#include <vnet/adj/adj.h>
+#include <vnet/ip/ip_types.h>
+
+#include <plugins/linux-cp/lcp.h>
+
+#define foreach_lcp_itf_pair_flag _ (STALE, 0, "stale")
+
+typedef enum lip_flag_t_
+{
+#define _(a, b, c) LIP_FLAG_##a = (1 << b),
+  foreach_lcp_itf_pair_flag
+#undef _
+} lip_flag_t;
+
+typedef enum
+{
+  LCP_ITF_HOST_TAP = 0,
+  LCP_ITF_HOST_TUN = 1,
+} lip_host_type_t;
+
+#define N_LCP_ITF_HOST (LCP_ITF_HOST_TUN + 1)
+
+typedef struct lcp_itf_phy_adj
+{
+  adj_index_t adj_index[N_AF];
+} lcp_itf_phy_adj_t;
+
+/**
+ * A pair of interfaces
+ */
+typedef struct lcp_itf_pair_t_
+{
+  u32 lip_host_sw_if_index;	  /* VPP's sw_if_index for the host tap */
+  u32 lip_phy_sw_if_index;	  /* VPP's sw_if_index for the phy */
+  u8 *lip_host_name;		  /* linux's name for the tap */
+  u32 lip_vif_index;		  /* linux's index for the tap */
+  u8 *lip_namespace;		  /* namespace in which the tap lives */
+  lip_host_type_t lip_host_type;  /* type of host interface */
+  lcp_itf_phy_adj_t lip_phy_adjs; /* adjacencies for phy l3 interface */
+  lip_flag_t lip_flags;		  /* Flags */
+  u8 lip_rewrite_len;		  /* The length of an L2 MAC rewrite */
+  f64 lip_create_ts;		  /* Timestamp of creation */
+} lcp_itf_pair_t;
+extern lcp_itf_pair_t *lcp_itf_pair_pool;
+
+extern vlib_node_registration_t lcp_ethernet_node;
+
+u8 *format_lcp_itf_pair (u8 *s, va_list *args);
+void lcp_itf_pair_show (u32 phy_sw_if_index);
+u32 lcp_itf_num_pairs (void);
+
+/**
+ * Get an interface-pair object from its VPP index
+ */
+extern lcp_itf_pair_t *lcp_itf_pair_get (index_t index);
+
+/**
+ * Find a interface-pair object from the host interface
+ *
+ * @param host_sw_if_index host interface
+ * @return VPP's object index
+ */
+extern index_t lcp_itf_pair_find_by_vif (u32 vif_index);
+
+/**
+ * Create an interface-pair
+ *
+ * @return error code
+ */
+extern int lcp_itf_pair_add (u32 host_sw_if_index, u32 phy_sw_if_index,
+			     u8 *host_name, u32 host_index,
+			     lip_host_type_t host_type, u8 *ns);
+extern int lcp_itf_pair_add_sub (u32 vif, u8 *host_name, u32 sub_sw_if_index,
+				 u32 phy_sw_if_index, u8 *ns);
+extern int lcp_itf_pair_del (u32 phy_sw_if_index);
+
+/**
+ * Create an interface-pair from PHY sw_if_index and tap name.
+ *
+ * @return error code
+ */
+extern int lcp_itf_pair_create (u32 phy_sw_if_index, u8 *host_if_name,
+				lip_host_type_t host_if_type, u8 *ns);
+
+/**
+ * Delete a LCP_ITF_PAIR
+ */
+extern int lcp_itf_pair_delete (u32 phy_sw_if_index);
+
+/**
+ * Callback function invoked during a walk of all interface-pairs
+ */
+typedef walk_rc_t (*lcp_itf_pair_walk_cb_t) (index_t index, void *ctx);
+
+/**
+ * Walk/visit each of the interface pairs
+ */
+extern void lcp_itf_pair_walk (lcp_itf_pair_walk_cb_t cb, void *ctx);
+
+/**
+ * Begin and End the replace process
+ */
+extern int lcp_itf_pair_replace_begin (void);
+extern int lcp_itf_pair_replace_end (void);
+
+/**
+ * Retreive the pair in the DP
+ */
+extern index_t *lip_db_by_phy;
+extern u32 *lip_db_by_host;
+
+always_inline index_t
+lcp_itf_pair_find_by_phy (u32 phy_sw_if_index)
+{
+  if (phy_sw_if_index >= vec_len (lip_db_by_phy))
+    return INDEX_INVALID;
+  return (lip_db_by_phy[phy_sw_if_index]);
+}
+
+always_inline index_t
+lcp_itf_pair_find_by_host (u32 host_sw_if_index)
+{
+  if (host_sw_if_index >= vec_len (lip_db_by_host))
+    return INDEX_INVALID;
+  return (lip_db_by_host[host_sw_if_index]);
+}
+
+/**
+ * manage interface auto creation
+ */
+void lcp_set_auto_intf (u8 is_auto);
+int lcp_auto_intf (void);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
+
+#endif