+++ /dev/null
-/*
- * replication.h : packet replication
- *
- * Copyright (c) 2013 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 included_replication_h
-#define included_replication_h
-
-
-#include <vlib/vlib.h>
-#include <vnet/vnet.h>
-#include <vnet/replication.h>
-
-
-typedef struct
-{
- /* The entire vnet buffer header restored for each replica */
- u8 vnet_buffer[40]; /* 16B aligned to allow vector unit copy */
- u8 reserved[24]; /* space for future expansion of vnet buffer header */
-
- /* feature state used during this replication */
- u64 feature_replicas; /* feature's id for its set of replicas */
- u32 feature_counter; /* feature's current index into set of replicas */
- u32 recycle_node_index; /* feature's recycle node index */
-
- /*
- * data saved from the start of replication and restored
- * at the end of replication
- */
- vlib_buffer_free_list_index_t saved_free_list_index; /* from vlib buffer */
-
- /* data saved from the original packet and restored for each replica */
- u64 l2_header[3]; /* 24B (must be at least 22B for l2 packets) */
- u32 flags; /* vnet buffer flags */
- u16 ip_tos; /* v4 and v6 */
- u16 ip4_checksum; /* needed for v4 only */
-
- /* data saved from the vlib buffer header and restored for each replica */
- i16 current_data; /* offset of first byte of packet in packet data */
- u8 pad[2]; /* to 64B */
- u8 l2_packet; /* flag for l2 vs l3 packet data */
-
-} replication_context_t; /* 128B */
-
-
-typedef struct
-{
-
- u32 recycle_list_index;
-
- /* per-thread pools of replication contexts */
- replication_context_t **contexts;
-
- vlib_main_t *vlib_main;
- vnet_main_t *vnet_main;
-
-} replication_main_t;
-
-
-extern replication_main_t replication_main;
-
-
-/* Return 1 if this buffer just came from the replication recycle handler. */
-always_inline u32
-replication_is_recycled (vlib_buffer_t * b0)
-{
- return b0->flags & VLIB_BUFFER_IS_RECYCLED;
-}
-
-/*
- * Clear the recycle flag. If buffer came from the replication recycle
- * handler, this flag must be cleared before the packet is transmitted again.
- */
-always_inline void
-replication_clear_recycled (vlib_buffer_t * b0)
-{
- b0->flags &= ~VLIB_BUFFER_IS_RECYCLED;
-}
-
-/*
- * Return the active replication context if this buffer has
- * been recycled, otherwise return 0. (Note that this essentially
- * restricts access to the replication context to the replication
- * feature's prep and recycle nodes.)
- */
-always_inline replication_context_t *
-replication_get_ctx (vlib_buffer_t * b0)
-{
- replication_main_t *rm = &replication_main;
-
- return replication_is_recycled (b0) ?
- pool_elt_at_index (rm->contexts[vlib_get_thread_index ()],
- b0->recycle_count) : 0;
-}
-
-/* Prefetch the replication context for this buffer, if it exists */
-always_inline void
-replication_prefetch_ctx (vlib_buffer_t * b0)
-{
- replication_context_t *ctx = replication_get_ctx (b0);
-
- if (ctx)
- {
- CLIB_PREFETCH (ctx, (2 * CLIB_CACHE_LINE_BYTES), STORE);
- }
-}
-
-replication_context_t *replication_prep (vlib_main_t * vm,
- vlib_buffer_t * b0,
- u32 recycle_node_index,
- u32 l2_packet);
-
-replication_context_t *replication_recycle (vlib_main_t * vm,
- vlib_buffer_t * b0, u32 is_last);
-
-
-#endif
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff