diff options
Diffstat (limited to 'vnet/vnet/config.c')
-rw-r--r-- | vnet/vnet/config.c | 361 |
1 files changed, 0 insertions, 361 deletions
diff --git a/vnet/vnet/config.c b/vnet/vnet/config.c deleted file mode 100644 index 03189d77cd5..00000000000 --- a/vnet/vnet/config.c +++ /dev/null @@ -1,361 +0,0 @@ -/* - * 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: - */ |