diff options
Diffstat (limited to 'vnet/vnet/fib/fib_node.c')
| -rw-r--r-- | vnet/vnet/fib/fib_node.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/vnet/vnet/fib/fib_node.c b/vnet/vnet/fib/fib_node.c new file mode 100644 index 00000000..8ac67d2e --- /dev/null +++ b/vnet/vnet/fib/fib_node.c @@ -0,0 +1,207 @@ +/* + * Copyright (c) 2016 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 <vnet/fib/fib_node.h> +#include <vnet/fib/fib_node_list.h> + +/* + * The per-type vector of virtual function tables + */ +static fib_node_vft_t *fn_vfts; + +/** + * The last registered new type + */ +static fib_node_type_t last_new_type = FIB_NODE_TYPE_LAST; + +/* + * the node type names + */ +static const char *fn_type_names[] = FIB_NODE_TYPES; + +const char* +fib_node_type_get_name (fib_node_type_t type) +{ + if (type < FIB_NODE_TYPE_LAST) + return (fn_type_names[type]); + else + { + if (NULL != fn_vfts[type].fnv_format) + { + return ("fixme"); + } + else + { + return ("unknown"); + } + } +} + +/** + * fib_node_register_type + * + * Register the function table for a given type + */ +void +fib_node_register_type (fib_node_type_t type, + const fib_node_vft_t *vft) +{ + /* + * assert that one only registration is made per-node type + */ + if (vec_len(fn_vfts) > type) + ASSERT(NULL == fn_vfts[type].fnv_get); + + /* + * Assert that we are getting each of the required functions + */ + ASSERT(NULL != vft->fnv_get); + ASSERT(NULL != vft->fnv_last_lock); + + vec_validate(fn_vfts, type); + fn_vfts[type] = *vft; +} + +fib_node_type_t +fib_node_register_new_type (const fib_node_vft_t *vft) +{ + fib_node_type_t new_type; + + new_type = ++last_new_type; + + fib_node_register_type(new_type, vft); + + return (new_type); +} + +static u8* +fib_node_format (fib_node_ptr_t *fnp, u8*s) +{ + return (format(s, "{%s:%d}", fn_type_names[fnp->fnp_type], fnp->fnp_index)); +} + +u32 +fib_node_child_add (fib_node_type_t parent_type, + fib_node_index_t parent_index, + fib_node_type_t type, + fib_node_index_t index) +{ + fib_node_t *parent; + + parent = fn_vfts[parent_type].fnv_get(parent_index); + + /* + * return the index of the sibling in the child list + */ + fib_node_lock(parent); + + if (FIB_NODE_INDEX_INVALID == parent->fn_children) + { + parent->fn_children = fib_node_list_create(); + } + + return (fib_node_list_push_front(parent->fn_children, + 0, type, + index)); +} + +void +fib_node_child_remove (fib_node_type_t parent_type, + fib_node_index_t parent_index, + fib_node_index_t sibling_index) +{ + fib_node_t *parent; + + parent = fn_vfts[parent_type].fnv_get(parent_index); + + fib_node_list_remove(parent->fn_children, sibling_index); + + if (0 == fib_node_list_get_size(parent->fn_children)) + { + fib_node_list_destroy(&parent->fn_children); + } + + fib_node_unlock(parent); +} + + +fib_node_back_walk_rc_t +fib_node_back_walk_one (fib_node_ptr_t *ptr, + fib_node_back_walk_ctx_t *ctx) +{ + fib_node_t *node; + + node = fn_vfts[ptr->fnp_type].fnv_get(ptr->fnp_index); + + return (fn_vfts[ptr->fnp_type].fnv_back_walk(node, ctx)); +} + +static int +fib_node_ptr_format_one_child (fib_node_ptr_t *ptr, + void *arg) +{ + u8 **s = (u8**) arg; + + *s = fib_node_format(ptr, *s); + + return (1); +} + +u8* +fib_node_children_format (fib_node_list_t list, + u8 *s) +{ + fib_node_list_walk(list, fib_node_ptr_format_one_child, (void*)&s); + + return (s); +} + +void +fib_node_init (fib_node_t *node, + fib_node_type_t type) +{ +#if CLIB_DEBUG > 0 + /** + * The node's type. make sure we are dynamic/down casting correctly + */ + node->fn_type = type; +#endif + node->fn_locks = 0; + node->fn_vft = &fn_vfts[type]; + node->fn_children = FIB_NODE_INDEX_INVALID; +} + +void +fib_node_deinit (fib_node_t *node) +{ + fib_node_list_destroy(&node->fn_children); +} + +void +fib_node_lock (fib_node_t *node) +{ + node->fn_locks++; +} + +void +fib_node_unlock (fib_node_t *node) +{ + node->fn_locks--; + + if (0 == node->fn_locks) + { + node->fn_vft->fnv_last_lock(node); + } +} |