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authorDamjan Marion <damarion@cisco.com>2018-09-03 15:41:45 +0200
committerDamjan Marion <dmarion@me.com>2018-09-03 18:41:13 +0000
commit8e71529ea86018ab05c8cb77081512cbd2e413a7 (patch)
tree8f7124d85db7a8eed7847b96e3228b6575bf548b /src/vnet/replication.c
parentd5c70d556283794b3d63808879c7230b5eebaf95 (diff)
Deprecate old buffer replication scheme
Change-Id: I1f54b994425c58776e1445c8d9fe142e7a644d3d Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vnet/replication.c')
-rw-r--r--src/vnet/replication.c283
1 files changed, 0 insertions, 283 deletions
diff --git a/src/vnet/replication.c b/src/vnet/replication.c
deleted file mode 100644
index 21f5485e6c7..00000000000
--- a/src/vnet/replication.c
+++ /dev/null
@@ -1,283 +0,0 @@
-/*
- * replication.c : 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.
- */
-
-#include <vlib/vlib.h>
-#include <vnet/vnet.h>
-#include <vppinfra/error.h>
-#include <vnet/ip/ip4_packet.h>
-#include <vnet/replication.h>
-
-
-replication_main_t replication_main;
-
-
-replication_context_t *
-replication_prep (vlib_main_t * vm,
- vlib_buffer_t * b0, u32 recycle_node_index, u32 l2_packet)
-{
- replication_main_t *rm = &replication_main;
- replication_context_t *ctx;
- uword thread_index = vm->thread_index;
- ip4_header_t *ip;
- u32 ctx_id;
-
- /* Allocate a context, reserve context 0 */
- if (PREDICT_FALSE (rm->contexts[thread_index] == 0))
- pool_get_aligned (rm->contexts[thread_index], ctx, CLIB_CACHE_LINE_BYTES);
-
- pool_get_aligned (rm->contexts[thread_index], ctx, CLIB_CACHE_LINE_BYTES);
- ctx_id = ctx - rm->contexts[thread_index];
-
- /* Save state from vlib buffer */
- ctx->saved_free_list_index = vlib_buffer_get_free_list_index (b0);
- ctx->current_data = b0->current_data;
- ctx->flags = b0->flags & VNET_BUFFER_FLAGS_VLAN_BITS;
-
- /* Set up vlib buffer hooks */
- b0->recycle_count = ctx_id;
- vlib_buffer_set_free_list_index (b0, rm->recycle_list_index);
- b0->flags |= VLIB_BUFFER_RECYCLE;
-
- /* Save feature state */
- ctx->recycle_node_index = recycle_node_index;
-
- /* Save vnet state */
- clib_memcpy (ctx->vnet_buffer, vnet_buffer (b0),
- sizeof (vnet_buffer_opaque_t));
-
- /* Save packet contents */
- ctx->l2_packet = l2_packet;
- ip = (ip4_header_t *) vlib_buffer_get_current (b0);
- if (l2_packet)
- {
- /* Save ethernet header */
- ctx->l2_header[0] = ((u64 *) ip)[0];
- ctx->l2_header[1] = ((u64 *) ip)[1];
- ctx->l2_header[2] = ((u64 *) ip)[2];
- /* set ip to the true ip header */
- ip = (ip4_header_t *) (((u8 *) ip) + vnet_buffer (b0)->l2.l2_len);
- }
-
- /*
- * Copy L3 fields.
- * We need to save TOS for ip4 and ip6 packets.
- * Fortunately the TOS field is
- * in the first two bytes of both the ip4 and ip6 headers.
- */
- ctx->ip_tos = *((u16 *) (ip));
-
- /*
- * Save the ip4 checksum as well. We just blindly save the corresponding two
- * bytes even for ip6 packets.
- */
- ctx->ip4_checksum = ip->checksum;
-
- return ctx;
-}
-
-
-replication_context_t *
-replication_recycle (vlib_main_t * vm, vlib_buffer_t * b0, u32 is_last)
-{
- replication_main_t *rm = &replication_main;
- replication_context_t *ctx;
- uword thread_index = vm->thread_index;
- ip4_header_t *ip;
-
- /* Get access to the replication context */
- ctx = pool_elt_at_index (rm->contexts[thread_index], b0->recycle_count);
-
- /* Restore vnet buffer state */
- clib_memcpy (vnet_buffer (b0), ctx->vnet_buffer,
- sizeof (vnet_buffer_opaque_t));
-
- /* Restore the vlan flags */
- b0->flags &= ~VNET_BUFFER_FLAGS_VLAN_BITS;
- b0->flags |= ctx->flags;
-
- /* Restore the packet start (current_data) and length */
- vlib_buffer_advance (b0, ctx->current_data - b0->current_data);
-
- /* Restore packet contents */
- ip = (ip4_header_t *) vlib_buffer_get_current (b0);
- if (ctx->l2_packet)
- {
- /* Restore ethernet header */
- ((u64 *) ip)[0] = ctx->l2_header[0];
- ((u64 *) ip)[1] = ctx->l2_header[1];
- ((u64 *) ip)[2] = ctx->l2_header[2];
- /* set ip to the true ip header */
- ip = (ip4_header_t *) (((u8 *) ip) + vnet_buffer (b0)->l2.l2_len);
- }
-
- // Restore L3 fields
- *((u16 *) (ip)) = ctx->ip_tos;
- ip->checksum = ctx->ip4_checksum;
-
- if (is_last)
- {
- /*
- * This is the last replication in the list.
- * Restore original buffer free functionality.
- */
- vlib_buffer_set_free_list_index (b0, ctx->saved_free_list_index);
- b0->flags &= ~VLIB_BUFFER_RECYCLE;
-
- /* Free context back to its pool */
- pool_put (rm->contexts[thread_index], ctx);
- }
-
- return ctx;
-}
-
-
-
-/*
- * fish pkts back from the recycle queue/freelist
- * un-flatten the context chains
- */
-static void
-replication_recycle_callback (vlib_main_t * vm, vlib_buffer_free_list_t * fl)
-{
- vlib_frame_t *f = 0;
- u32 n_left_from;
- u32 n_left_to_next = 0;
- u32 n_this_frame = 0;
- u32 *from;
- u32 *to_next = 0;
- u32 bi0, pi0;
- vlib_buffer_t *b0;
- int i;
- replication_main_t *rm = &replication_main;
- replication_context_t *ctx;
- u32 feature_node_index = 0;
- uword thread_index = vm->thread_index;
-
- /*
- * All buffers in the list are destined to the same recycle node.
- * Pull the recycle node index from the first buffer.
- * Note: this could be sped up if the node index were stuffed into
- * the freelist itself.
- */
- if (vec_len (fl->buffers) > 0)
- {
- bi0 = fl->buffers[0];
- b0 = vlib_get_buffer (vm, bi0);
- ctx = pool_elt_at_index (rm->contexts[thread_index], b0->recycle_count);
- feature_node_index = ctx->recycle_node_index;
- }
-
- /* buffers */
- for (i = 0; i < 2; i++)
- {
- if (i == 0)
- {
- from = fl->buffers;
- n_left_from = vec_len (from);
- }
-
- while (n_left_from > 0)
- {
- if (PREDICT_FALSE (n_left_to_next == 0))
- {
- if (f)
- {
- f->n_vectors = n_this_frame;
- vlib_put_frame_to_node (vm, feature_node_index, f);
- }
-
- f = vlib_get_frame_to_node (vm, feature_node_index);
- to_next = vlib_frame_vector_args (f);
- n_left_to_next = VLIB_FRAME_SIZE;
- n_this_frame = 0;
- }
-
- bi0 = from[0];
- if (PREDICT_TRUE (n_left_from > 1))
- {
- pi0 = from[1];
- vlib_prefetch_buffer_with_index (vm, pi0, LOAD);
- }
-
- b0 = vlib_get_buffer (vm, bi0);
-
- /* Mark that this buffer was just recycled */
- b0->flags |= VLIB_BUFFER_IS_RECYCLED;
-
-#if (CLIB_DEBUG > 0)
- if (buffer_main.callbacks_registered == 0)
- vlib_buffer_set_known_state (bi0, VLIB_BUFFER_KNOWN_ALLOCATED);
-#endif
-
- /* If buffer is traced, mark frame as traced */
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- f->flags |= VLIB_FRAME_TRACE;
-
- to_next[0] = bi0;
-
- from++;
- to_next++;
- n_this_frame++;
- n_left_to_next--;
- n_left_from--;
- }
- }
-
- vec_reset_length (fl->buffers);
-
- if (f)
- {
- ASSERT (n_this_frame);
- f->n_vectors = n_this_frame;
- vlib_put_frame_to_node (vm, feature_node_index, f);
- }
-}
-
-clib_error_t *
-replication_init (vlib_main_t * vm)
-{
- replication_main_t *rm = &replication_main;
- vlib_buffer_free_list_t *fl;
- __attribute__ ((unused)) replication_context_t *ctx;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
-
- rm->vlib_main = vm;
- rm->vnet_main = vnet_get_main ();
- rm->recycle_list_index =
- vlib_buffer_create_free_list (vm, 1024 /* fictional */ ,
- "replication-recycle");
-
- fl = pool_elt_at_index (vm->buffer_free_list_pool, rm->recycle_list_index);
-
- fl->buffers_added_to_freelist_function = replication_recycle_callback;
-
- /* Verify the replication context is the expected size */
- ASSERT (sizeof (replication_context_t) == 128); /* 2 cache lines */
-
- vec_validate (rm->contexts, tm->n_vlib_mains - 1);
- return 0;
-}
-
-VLIB_INIT_FUNCTION (replication_init);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */