/* * 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/mfib/ip4_mfib.h> #include <vnet/mfib/mfib_table.h> #include <vnet/mfib/mfib_entry.h> static const mfib_prefix_t all_zeros = { .fp_proto = FIB_PROTOCOL_IP4, }; static const mfib_prefix_t ip4_specials[] = { /* ALL prefixes are in network order */ { /* (*,224.0.0.1)/32 - all hosts */ .fp_grp_addr = { .ip4.data_u32 = 0x010000e0, }, .fp_len = 32, .fp_proto = FIB_PROTOCOL_IP4, }, { /* (*,224.0.0.2)/32 - all routers */ .fp_grp_addr = { .ip4.data_u32 = 0x020000e0, }, .fp_len = 32, .fp_proto = FIB_PROTOCOL_IP4, }, }; static u32 ip4_create_mfib_with_table_id (u32 table_id, mfib_source_t src) { mfib_table_t *mfib_table; pool_get_aligned(ip4_main.mfibs, mfib_table, CLIB_CACHE_LINE_BYTES); clib_memset(mfib_table, 0, sizeof(*mfib_table)); mfib_table->mft_proto = FIB_PROTOCOL_IP4; mfib_table->mft_index = mfib_table->v4.index = (mfib_table - ip4_main.mfibs); hash_set (ip4_main.mfib_index_by_table_id, table_id, mfib_table->mft_index); mfib_table->mft_table_id = mfib_table->v4.table_id = table_id; mfib_table_lock(mfib_table->mft_index, FIB_PROTOCOL_IP4, src); /* * add the default route into the new FIB */ mfib_table_entry_update(mfib_table->mft_index, &all_zeros, MFIB_SOURCE_DEFAULT_ROUTE, MFIB_RPF_ID_NONE, MFIB_ENTRY_FLAG_DROP); const fib_route_path_t path = { .frp_proto = DPO_PROTO_IP4, .frp_addr = zero_addr, .frp_sw_if_index = ~0, .frp_fib_index = ~0, .frp_weight = 1, .frp_flags = FIB_ROUTE_PATH_LOCAL, .frp_mitf_flags = MFIB_ITF_FLAG_FORWARD, }; int ii; for (ii = 0; ii < ARRAY_LEN(ip4_specials); ii++) { mfib_table_entry_path_update(mfib_table->mft_index, &ip4_specials[ii], MFIB_SOURCE_SPECIAL, &path); } return (mfib_table->mft_index); } void ip4_mfib_table_destroy (ip4_mfib_t *mfib) { mfib_table_t *mfib_table = (mfib_table_t*)mfib; int ii; /* * remove all the specials we added when the table was created. */ mfib_table_entry_delete(mfib_table->mft_index, &all_zeros, MFIB_SOURCE_DEFAULT_ROUTE); for (ii = 0; ii < ARRAY_LEN(ip4_specials); ii++) { mfib_table_entry_delete(mfib_table->mft_index, &ip4_specials[ii], MFIB_SOURCE_SPECIAL); } /* * validate no more routes. */ ASSERT(0 == mfib_table->mft_total_route_counts); ASSERT(~0 != mfib_table->mft_table_id); hash_unset (ip4_main.mfib_index_by_table_id, mfib_table->mft_table_id); pool_put(ip4_main.mfibs, mfib_table); } void ip4_mfib_interface_enable_disable (u32 sw_if_index, int is_enable) { const fib_route_path_t path = { .frp_proto = DPO_PROTO_IP4, .frp_addr = zero_addr, .frp_sw_if_index = sw_if_index, .frp_fib_index = ~0, .frp_weight = 1, .frp_mitf_flags = MFIB_ITF_FLAG_ACCEPT, }; u32 mfib_index; int ii; vec_validate (ip4_main.mfib_index_by_sw_if_index, sw_if_index); mfib_index = ip4_mfib_table_get_index_for_sw_if_index(sw_if_index); for (ii = 0; ii < ARRAY_LEN(ip4_specials); ii++) { if (is_enable) { mfib_table_entry_path_update(mfib_index, &ip4_specials[ii], MFIB_SOURCE_SPECIAL, &path); } else { mfib_table_entry_path_remove(mfib_index, &ip4_specials[ii], MFIB_SOURCE_SPECIAL, &path); } } } u32 ip4_mfib_table_find_or_create_and_lock (u32 table_id, mfib_source_t src) { u32 index; index = ip4_mfib_index_from_table_id(table_id); if (~0 == index) return ip4_create_mfib_with_table_id(table_id, src); mfib_table_lock(index, FIB_PROTOCOL_IP4, src); return (index); } u32 ip4_mfib_table_get_index_for_sw_if_index (u32 sw_if_index) { if (sw_if_index >= vec_len(ip4_main.mfib_index_by_sw_if_index)) { /* * This is the case for interfaces that are not yet mapped to * a IP table */ return (~0); } return (ip4_main.mfib_index_by_sw_if_index[sw_if_index]); } #define IPV4_MFIB_GRP_LEN(_len)\ (_len > 32 ? 32 : _len) #define IP4_MFIB_MK_KEY(_grp, _src, _len, _key) \ { \ _key = ((u64)(_grp->data_u32 & \ ip4_main.fib_masks[IPV4_MFIB_GRP_LEN(_len)])) << 32; \ _key |= _src->data_u32; \ } #define IP4_MFIB_MK_GRP_KEY(_grp, _len, _key) \ { \ _key = ((u64)(_grp->data_u32 & \ ip4_main.fib_masks[IPV4_MFIB_GRP_LEN(_len)])) << 32; \ } /* * ip4_fib_table_lookup_exact_match * * Exact match prefix lookup */ fib_node_index_t ip4_mfib_table_lookup_exact_match (const ip4_mfib_t *mfib, const ip4_address_t *grp, const ip4_address_t *src, u32 len) { uword * hash, * result; u64 key; hash = mfib->fib_entry_by_dst_address[len]; IP4_MFIB_MK_KEY(grp, src, len, key); result = hash_get(hash, key); if (NULL != result) { return (result[0]); } return (FIB_NODE_INDEX_INVALID); } /* * ip4_fib_table_lookup * * Longest prefix match */ fib_node_index_t ip4_mfib_table_lookup (const ip4_mfib_t *mfib, const ip4_address_t *src, const ip4_address_t *grp, u32 len) { uword * hash, * result; i32 mask_len; u64 key; mask_len = len; if (PREDICT_TRUE(64 == mask_len)) { hash = mfib->fib_entry_by_dst_address[mask_len]; IP4_MFIB_MK_KEY(grp, src, mask_len, key); result = hash_get (hash, key); if (NULL != result) { return (result[0]); } } for (mask_len = (len == 64 ? 32 : len); mask_len >= 0; mask_len--) { hash = mfib->fib_entry_by_dst_address[mask_len]; IP4_MFIB_MK_GRP_KEY(grp, mask_len, key); result = hash_get (hash, key); if (NULL != result) { return (result[0]); } } return (FIB_NODE_INDEX_INVALID); } fib_node_index_t ip4_mfib_table_get_less_specific (const ip4_mfib_t *mfib, const ip4_address_t *src, const ip4_address_t *grp, u32 len) { u32 mask_len; /* * in the absence of a tree structure for the table that allows for an O(1) * parent get, a cheeky way to find the cover is to LPM for the prefix with * mask-1. * there should always be a cover, though it may be the default route. the * default route's cover is the default route. */ if (len == 64) { /* go from (S,G) to (*,G*) */ mask_len = 32; } else if (len != 0) { mask_len = len - 1; } else { mask_len = len; } return (ip4_mfib_table_lookup(mfib, src, grp, mask_len)); } void ip4_mfib_table_entry_insert (ip4_mfib_t *mfib, const ip4_address_t *grp, const ip4_address_t *src, u32 len, fib_node_index_t fib_entry_index) { uword * hash, * result; u64 key; IP4_MFIB_MK_KEY(grp, src, len, key); hash = mfib->fib_entry_by_dst_address[len]; result = hash_get (hash, key); if (NULL == result) { /* * adding a new entry */ if (NULL == hash) { hash = hash_create (32 /* elts */, sizeof (uword)); hash_set_flags (hash, HASH_FLAG_NO_AUTO_SHRINK); } hash = hash_set(hash, key, fib_entry_index); mfib->fib_entry_by_dst_address[len] = hash; } else { ASSERT(0); } } void ip4_mfib_table_entry_remove (ip4_mfib_t *mfib, const ip4_address_t *grp, const ip4_address_t *src, u32 len) { uword * hash, * result; u64 key; IP4_MFIB_MK_KEY(grp, src, len, key); hash = mfib->fib_entry_by_dst_address[len]; result = hash_get (hash, key); if (NULL == result) { /* * removing a non-existent entry. i'll allow it. */ } else { hash_unset(hash, key); } mfib->fib_entry_by_dst_address[len] = hash; } void ip4_mfib_table_walk (ip4_mfib_t *mfib, mfib_table_walk_fn_t fn, void *ctx) { int i; for (i = 0; i < ARRAY_LEN (mfib->fib_entry_by_dst_address); i++) { uword * hash = mfib->fib_entry_by_dst_address[i]; if (NULL != hash) { hash_pair_t * p; hash_foreach_pair (p, hash, ({ fn(p->value[0], ctx); })); } } } u8 * format_ip4_mfib_table_memory (u8 * s, va_list * args) { mfib_table_t *mfib_table; u64 total_memory; total_memory = 0; pool_foreach (mfib_table, ip4_main.mfibs, ({ ip4_mfib_t *mfib = &mfib_table->v4; uword mfib_size; int i; mfib_size = 0; for (i = 0; i < ARRAY_LEN (mfib->fib_entry_by_dst_address); i++) { uword * hash = mfib->fib_entry_by_dst_address[i]; if (NULL != hash) { mfib_size += hash_bytes(hash); } } total_memory += mfib_size; })); s = format(s, "%=30s %=6d %=12ld\n", "IPv4 multicast", pool_elts(ip4_main.mfibs), total_memory); return (s); } static void ip4_mfib_table_show_all (ip4_mfib_t *mfib, vlib_main_t * vm) { fib_node_index_t *mfib_entry_indicies; fib_node_index_t *mfib_entry_index; int i; mfib_entry_indicies = NULL; for (i = 0; i < ARRAY_LEN (mfib->fib_entry_by_dst_address); i++) { uword * hash = mfib->fib_entry_by_dst_address[i]; if (NULL != hash) { hash_pair_t * p; hash_foreach_pair (p, hash, ({ vec_add1(mfib_entry_indicies, p->value[0]); })); } } vec_sort_with_function(mfib_entry_indicies, mfib_entry_cmp_for_sort); vec_foreach(mfib_entry_index, mfib_entry_indicies) { vlib_cli_output(vm, "%U", format_mfib_entry, *mfib_entry_index, MFIB_ENTRY_FORMAT_BRIEF); } vec_free(mfib_entry_indicies); } static void ip4_mfib_table_show_one (ip4_mfib_t *mfib, vlib_main_t * vm, ip4_address_t *src, ip4_address_t *grp, u32 mask_len) { vlib_cli_output(vm, "%U", format_mfib_entry, ip4_mfib_table_lookup(mfib, src, grp, mask_len), MFIB_ENTRY_FORMAT_DETAIL); } static clib_error_t * ip4_show_mfib (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { ip4_main_t * im4 = &ip4_main; mfib_table_t *mfib_table; int verbose, matching, memory; ip4_address_t grp, src = {{0}}; u32 mask = 32; u64 total_hash_memory; int i, table_id = -1, fib_index = ~0; verbose = 1; memory = matching = 0; total_hash_memory = 0; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "brief") || unformat (input, "summary") || unformat (input, "sum")) verbose = 0; else if (unformat (input, "mem") || unformat (input, "memory")) memory = 1; else if (unformat (input, "%U %U", unformat_ip4_address, &src, unformat_ip4_address, &grp)) { matching = 1; mask = 64; } else if (unformat (input, "%U/%d", unformat_ip4_address, &grp, &mask)) { clib_memset(&src, 0, sizeof(src)); matching = 1; } else if (unformat (input, "%U", unformat_ip4_address, &grp)) { clib_memset(&src, 0, sizeof(src)); matching = 1; mask = 32; } else if (unformat (input, "table %d", &table_id)) ; else if (unformat (input, "index %d", &fib_index)) ; else break; } pool_foreach (mfib_table, im4->mfibs, ({ ip4_mfib_t *mfib = &mfib_table->v4; if (table_id >= 0 && table_id != (int)mfib->table_id) continue; if (fib_index != ~0 && fib_index != (int)mfib->index) continue; if (memory) { uword hash_size; hash_size = 0; for (i = 0; i < ARRAY_LEN (mfib->fib_entry_by_dst_address); i++) { uword * hash = mfib->fib_entry_by_dst_address[i]; if (NULL != hash) { hash_size += hash_bytes(hash); } } if (verbose) vlib_cli_output (vm, "%U hash:%d", format_mfib_table_name, mfib->index, FIB_PROTOCOL_IP4, hash_size); total_hash_memory += hash_size; continue; } vlib_cli_output (vm, "%U, fib_index:%d flags:%U", format_mfib_table_name, mfib->index, FIB_PROTOCOL_IP4, mfib->index, format_mfib_table_flags, mfib_table->mft_flags); /* Show summary? */ if (! verbose) { vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count"); for (i = 0; i < ARRAY_LEN (mfib->fib_entry_by_dst_address); i++) { uword * hash = mfib->fib_entry_by_dst_address[i]; uword n_elts = hash_elts (hash); if (n_elts > 0) vlib_cli_output (vm, "%20d%16d", i, n_elts); } continue; } if (!matching) { ip4_mfib_table_show_all(mfib, vm); } else { ip4_mfib_table_show_one(mfib, vm, &src, &grp, mask); } })); if (memory) vlib_cli_output (vm, "totals: hash:%ld", total_hash_memory); return 0; } /*? * This command displays the IPv4 MulticasrFIB Tables (VRF Tables) and * the route entries for each table. * * @note This command will run for a long time when the FIB tables are * comprised of millions of entries. For those senarios, consider displaying * a single table or summary mode. * * @cliexpar * Example of how to display all the IPv4 Multicast FIB tables: * @cliexstart{show ip fib} * ipv4-VRF:0, fib_index 0 * (*, 0.0.0.0/0): flags:D, * Interfaces: * multicast-ip4-chain * [@1]: dpo-drop ip4 * (*, 232.1.1.1/32): * Interfaces: * test-eth1: Forward, * test-eth2: Forward, * test-eth0: Accept, * multicast-ip4-chain * [@2]: dpo-replicate: [index:1 buckets:2 to:[0:0]] * [0] [@1]: ipv4-mcast: test-eth1: IP4: d0:d1:d2:d3:d4:01 -> 01:00:05:00:00:00 * [1] [@1]: ipv4-mcast: test-eth2: IP4: d0:d1:d2:d3:d4:02 -> 01:00:05:00:00:00 * * @cliexend * Example of how to display a summary of all IPv4 FIB tables: * @cliexstart{show ip fib summary} * ipv4-VRF:0, fib_index 0, flow hash: src dst sport dport proto * Prefix length Count * 0 1 * 8 2 * 32 4 * ipv4-VRF:7, fib_index 1, flow hash: src dst sport dport proto * Prefix length Count * 0 1 * 8 2 * 24 2 * 32 4 * @cliexend ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (ip4_show_mfib_command, static) = { .path = "show ip mfib", .short_help = "show ip mfib [summary] [table <table-id>] [index <fib-id>] [<grp-addr>[/<mask>]] [<grp-addr>] [<src-addr> <grp-addr>]", .function = ip4_show_mfib, }; /* *INDENT-ON* */