tcp: remove internal buffer cache - vpp - Vector Packet Processing

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author	Florin Coras <fcoras@cisco.com>	2019-01-31 17:31:01 -0800
committer	Damjan Marion <dmarion@me.com>	2019-02-02 00:25:55 +0000
commit	bdf7fd62a0c6f33e5af5db326fa726f475960a85 (patch)
tree	768e4a68e31c799883096fa0d0fb0a5e36fb91db /test/vpp_ipsec_tun_interface.py
parent	2068fd4df9adadc2ea387ed1cdd3231bce1b3e6f (diff)

tcp: remove internal buffer cache

Change-Id: I3051d49aa9b9c38dcd8069ea1748f74ab20ac0f6 Signed-off-by: Florin Coras <fcoras@cisco.com>

Diffstat (limited to 'test/vpp_ipsec_tun_interface.py')

0 files changed, 0 insertions, 0 deletions

/* * Copyright (c) 2015 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. */ /* * config.c: feature configuration * * Copyright (c) 2008 Eliot Dresselhaus * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include <vnet/vnet.h> static vnet_config_feature_t * duplicate_feature_vector (vnet_config_feature_t * feature_vector) { vnet_config_feature_t *result, *f; result = vec_dup (feature_vector); vec_foreach (f, result) f->feature_config = vec_dup (f->feature_config); return result; } static void free_feature_vector (vnet_config_feature_t * feature_vector) { vnet_config_feature_t *f; vec_foreach (f, feature_vector) vnet_config_feature_free (f); vec_free (feature_vector); } static u32 add_next (vlib_main_t * vm, vnet_config_main_t * cm, u32 last_node_index, u32 this_node_index) { u32 i, ni = ~0; if (last_node_index != ~0) return vlib_node_add_next (vm, last_node_index, this_node_index); for (i = 0; i < vec_len (cm->start_node_indices); i++) { u32 tmp; tmp = vlib_node_add_next (vm, cm->start_node_indices[i], this_node_index); if (ni == ~0) ni = tmp; /* Start nodes to first must agree on next indices. */ ASSERT (ni == tmp); } return ni; } static vnet_config_t * find_config_with_features (vlib_main_t * vm, vnet_config_main_t * cm, vnet_config_feature_t * feature_vector) { u32 last_node_index = ~0; vnet_config_feature_t *f; u32 *config_string; uword *p; vnet_config_t *c; config_string = cm->config_string_temp; cm->config_string_temp = 0; if (config_string) _vec_len (config_string) = 0; vec_foreach (f, feature_vector) { /* Connect node graph. */ f->next_index = add_next (vm, cm, last_node_index, f->node_index); last_node_index = f->node_index; /* Store next index in config string. */ vec_add1 (config_string, f->next_index); /* Store feature config. */ vec_add (config_string, f->feature_config, vec_len (f->feature_config)); } /* Terminate config string with next for end node. */ if (last_node_index == ~0 || last_node_index != cm->end_node_index) { u32 next_index = add_next (vm, cm, last_node_index, cm->end_node_index); vec_add1 (config_string, next_index); } /* See if config string is unique. */ p = hash_get_mem (cm->config_string_hash, config_string); if (p) { /* Not unique. Share existing config. */ cm->config_string_temp = config_string; /* we'll use it again later. */ free_feature_vector (feature_vector); c = pool_elt_at_index (cm->config_pool, p[0]); } else { u32 *d; pool_get (cm->config_pool, c); c->index = c - cm->config_pool; c->features = feature_vector; c->config_string_vector = config_string; /* Allocate copy of config string in heap. VLIB buffers will maintain pointers to heap as they read out configuration data. */ c->config_string_heap_index = heap_alloc (cm->config_string_heap, vec_len (config_string) + 1, c->config_string_heap_handle); /* First element in heap points back to pool index. */ d = vec_elt_at_index (cm->config_string_heap, c->config_string_heap_index); d[0] = c->index; clib_memcpy (d + 1, config_string, vec_bytes (config_string)); hash_set_mem (cm->config_string_hash, config_string, c->index); c->reference_count = 0; /* will be incremented by caller. */ } return c; } void vnet_config_init (vlib_main_t * vm, vnet_config_main_t * cm, char *start_node_names[], int n_start_node_names, char *feature_node_names[], int n_feature_node_names) { vlib_node_t *n; u32 i; memset (cm, 0, sizeof (cm[0])); cm->config_string_hash = hash_create_vec (0, STRUCT_SIZE_OF (vnet_config_t, config_string_vector[0]), sizeof (uword)); ASSERT (n_feature_node_names >= 1); vec_resize (cm->start_node_indices, n_start_node_names); for (i = 0; i < n_start_node_names; i++) { n = vlib_get_node_by_name (vm, (u8 *) start_node_names[i]); /* Given node name must exist. */ ASSERT (n != 0); cm->start_node_indices[i] = n->index; } vec_resize (cm->node_index_by_feature_index, n_feature_node_names); for (i = 0; i < n_feature_node_names; i++) { if (!feature_node_names[i]) cm->node_index_by_feature_index[i] = ~0; else { n = vlib_get_node_by_name (vm, (u8 *) feature_node_names[i]); /* Given node may exist in plug-in library which is not present */ if (n) { if (i + 1 == n_feature_node_names) cm->end_node_index = n->index; cm->node_index_by_feature_index[i] = n->index; } else cm->node_index_by_feature_index[i] = ~0; } } } static void remove_reference (vnet_config_main_t * cm, vnet_config_t * c) { ASSERT (c->reference_count > 0); c->reference_count -= 1; if (c->reference_count == 0) { hash_unset (cm->config_string_hash, c->config_string_vector); vnet_config_free (cm, c); pool_put (cm->config_pool, c); } } static int feature_cmp (void *a1, void *a2) { vnet_config_feature_t *f1 = a1; vnet_config_feature_t *f2 = a2; return (int) f1->feature_index - f2->feature_index; } always_inline u32 * vnet_get_config_heap (vnet_config_main_t * cm, u32 ci) { return heap_elt_at_index (cm->config_string_heap, ci); } u32 vnet_config_add_feature (vlib_main_t * vm, vnet_config_main_t * cm, u32 config_string_heap_index, u32 feature_index, void *feature_config, u32 n_feature_config_bytes) { vnet_config_t *old, *new; vnet_config_feature_t *new_features, *f; u32 n_feature_config_u32s; u32 node_index = vec_elt (cm->node_index_by_feature_index, feature_index); if (node_index == ~0) // feature node does not exist return config_string_heap_index; // return original config index if (config_string_heap_index == ~0) { old = 0; new_features = 0; } else { u32 *p = vnet_get_config_heap (cm, config_string_heap_index); old = pool_elt_at_index (cm->config_pool, p[-1]); new_features = old->features; if (new_features) new_features = duplicate_feature_vector (new_features); } vec_add2 (new_features, f, 1); f->feature_index = feature_index; f->node_index = node_index; n_feature_config_u32s = round_pow2 (n_feature_config_bytes, sizeof (f->feature_config[0])) / sizeof (f->feature_config[0]); vec_add (f->feature_config, feature_config, n_feature_config_u32s); /* Sort (prioritize) features. */ if (vec_len (new_features) > 1) vec_sort_with_function (new_features, feature_cmp); if (old) remove_reference (cm, old); new = find_config_with_features (vm, cm, new_features); new->reference_count += 1; /* * User gets pointer to config string first element * (which defines the pool index * this config string comes from). */ vec_validate (cm->config_pool_index_by_user_index, new->config_string_heap_index + 1); cm->config_pool_index_by_user_index[new->config_string_heap_index + 1] = new - cm->config_pool; return new->config_string_heap_index + 1; } u32 vnet_config_del_feature (vlib_main_t * vm, vnet_config_main_t * cm, u32 config_string_heap_index, u32 feature_index, void *feature_config, u32 n_feature_config_bytes) { vnet_config_t *old, *new; vnet_config_feature_t *new_features, *f; u32 n_feature_config_u32s; { u32 *p = vnet_get_config_heap (cm, config_string_heap_index); old = pool_elt_at_index (cm->config_pool, p[-1]); } n_feature_config_u32s = round_pow2 (n_feature_config_bytes, sizeof (f->feature_config[0])) / sizeof (f->feature_config[0]); /* Find feature with same index and opaque data. */ vec_foreach (f, old->features) { if (f->feature_index == feature_index && vec_len (f->feature_config) == n_feature_config_u32s && (n_feature_config_u32s == 0 || !memcmp (f->feature_config, feature_config, n_feature_config_bytes))) break; } /* Feature not found. */ if (f >= vec_end (old->features)) return config_string_heap_index; // return original config index new_features = duplicate_feature_vector (old->features); f = new_features + (f - old->features); vnet_config_feature_free (f); vec_delete (new_features, 1, f - new_features); /* must remove old from config_pool now as it may be expanded and change memory location if the following function find_config_with_features() adds a new config because none of existing config's has matching features and so can be reused */ remove_reference (cm, old); new = find_config_with_features (vm, cm, new_features); new->reference_count += 1; vec_validate (cm->config_pool_index_by_user_index, new->config_string_heap_index + 1); cm->config_pool_index_by_user_index[new->config_string_heap_index + 1] = new - cm->config_pool; return new->config_string_heap_index + 1; } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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