diff options
author | Sachin Saxena <sachin.saxena@freescale.com> | 2018-02-28 20:28:52 +0530 |
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committer | Sachin Saxena <sachin.saxena@nxp.com> | 2018-02-28 20:34:56 +0530 |
commit | 0689fce93ba269c48f83a2f70f971b3976d04c90 (patch) | |
tree | 4cc2908df3598507cc1828ac19d8c43b22450ffa /src/vnet/l2/l2_fib.c | |
parent | 746b57564deede624261ab8a96c94f562f24d22c (diff) | |
parent | d594711a5d79859a7d0bde83a516f7ab52051d9b (diff) |
Merge branch 'stable/1710' of https://gerrit.fd.io/r/vpp into 17101710
Diffstat (limited to 'src/vnet/l2/l2_fib.c')
-rw-r--r-- | src/vnet/l2/l2_fib.c | 1250 |
1 files changed, 1250 insertions, 0 deletions
diff --git a/src/vnet/l2/l2_fib.c b/src/vnet/l2/l2_fib.c new file mode 100644 index 00000000..64b3275b --- /dev/null +++ b/src/vnet/l2/l2_fib.c @@ -0,0 +1,1250 @@ +/* + * l2_fib.c : layer 2 forwarding table (aka mac table) + * + * 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 <vnet/pg/pg.h> +#include <vnet/ethernet/ethernet.h> +#include <vlib/cli.h> + +#include <vppinfra/error.h> +#include <vppinfra/hash.h> +#include <vnet/l2/l2_input.h> +#include <vnet/l2/l2_fib.h> +#include <vnet/l2/l2_learn.h> +#include <vnet/l2/l2_bd.h> + +#include <vppinfra/bihash_template.c> + +#include <vlibmemory/api.h> +#include <vnet/vnet_msg_enum.h> + +#define vl_typedefs /* define message structures */ +#include <vnet/vnet_all_api_h.h> +#undef vl_typedefs + +#define vl_endianfun /* define message structures */ +#include <vnet/vnet_all_api_h.h> +#undef vl_endianfun + +/** + * @file + * @brief Ethernet MAC Address FIB Table Management. + * + * The MAC Address forwarding table for bridge-domains is called the l2fib. + * Entries are added automatically as part of mac learning, but MAC Addresses + * entries can also be added manually. + * + */ + +l2fib_main_t l2fib_main; + +/** Format sw_if_index. If the value is ~0, use the text "N/A" */ +u8 * +format_vnet_sw_if_index_name_with_NA (u8 * s, va_list * args) +{ + vnet_main_t *vnm = va_arg (*args, vnet_main_t *); + u32 sw_if_index = va_arg (*args, u32); + if (sw_if_index == ~0) + return format (s, "N/A"); + + vnet_sw_interface_t *swif = vnet_get_sw_interface_safe (vnm, sw_if_index); + if (!swif) + return format (s, "Stale"); + + return format (s, "%U", format_vnet_sw_interface_name, vnm, + vnet_get_sw_interface_safe (vnm, sw_if_index)); +} + +void +l2fib_table_dump (u32 bd_index, l2fib_entry_key_t ** l2fe_key, + l2fib_entry_result_t ** l2fe_res) +{ + l2fib_main_t *msm = &l2fib_main; + BVT (clib_bihash) * h = &msm->mac_table; + BVT (clib_bihash_bucket) * b; + BVT (clib_bihash_value) * v; + l2fib_entry_key_t key; + l2fib_entry_result_t result; + int i, j, k; + + for (i = 0; i < h->nbuckets; i++) + { + b = &h->buckets[i]; + if (b->offset == 0) + continue; + v = BV (clib_bihash_get_value) (h, b->offset); + for (j = 0; j < (1 << b->log2_pages); j++) + { + for (k = 0; k < BIHASH_KVP_PER_PAGE; k++) + { + if (v->kvp[k].key == ~0ULL && v->kvp[k].value == ~0ULL) + continue; + + key.raw = v->kvp[k].key; + result.raw = v->kvp[k].value; + + if ((bd_index == ~0) || (bd_index == key.fields.bd_index)) + { + vec_add1 (*l2fe_key, key); + vec_add1 (*l2fe_res, result); + } + } + v++; + } + } +} + +/** Display the contents of the l2fib. */ +static clib_error_t * +show_l2fib (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + bd_main_t *bdm = &bd_main; + l2fib_main_t *msm = &l2fib_main; + l2_bridge_domain_t *bd_config; + BVT (clib_bihash) * h = &msm->mac_table; + BVT (clib_bihash_bucket) * b; + BVT (clib_bihash_value) * v; + l2fib_entry_key_t key; + l2fib_entry_result_t result; + u32 first_entry = 1; + u64 total_entries = 0; + int i, j, k; + u8 verbose = 0; + u8 raw = 0; + u8 learn = 0; + u32 bd_id, bd_index = ~0; + u8 now = (u8) (vlib_time_now (vm) / 60); + u8 *s = 0; + + if (unformat (input, "raw")) + raw = 1; + else if (unformat (input, "verbose")) + verbose = 1; + else if (unformat (input, "bd_index %d", &bd_index)) + verbose = 1; + else if (unformat (input, "learn")) + { + learn = 1; + verbose = 0; + } + else if (unformat (input, "bd_id %d", &bd_id)) + { + uword *p = hash_get (bdm->bd_index_by_bd_id, bd_id); + if (p) + { + if (learn == 0) + verbose = 1; + bd_index = p[0]; + } + else + { + vlib_cli_output (vm, "no such bridge domain id"); + return 0; + } + } + + for (i = 0; i < h->nbuckets; i++) + { + b = &h->buckets[i]; + if (b->offset == 0) + continue; + v = BV (clib_bihash_get_value) (h, b->offset); + for (j = 0; j < (1 << b->log2_pages); j++) + { + for (k = 0; k < BIHASH_KVP_PER_PAGE; k++) + { + if (v->kvp[k].key == ~0ULL && v->kvp[k].value == ~0ULL) + continue; + + if ((verbose || learn) && first_entry) + { + first_entry = 0; + vlib_cli_output (vm, + "%=19s%=7s%=7s%=8s%=9s%=7s%=7s%=5s%=30s", + "Mac-Address", "BD-Idx", "If-Idx", + "BSN-ISN", "Age(min)", "static", "filter", + "bvi", "Interface-Name"); + } + + key.raw = v->kvp[k].key; + result.raw = v->kvp[k].value; + + if ((verbose || learn) + & ((bd_index >> 31) || (bd_index == key.fields.bd_index))) + { + if (learn && result.fields.age_not) + { + total_entries++; + continue; /* skip provisioned macs */ + } + + bd_config = vec_elt_at_index (l2input_main.bd_configs, + key.fields.bd_index); + + if (bd_config->mac_age && !result.fields.age_not) + { + i16 delta = now - result.fields.timestamp; + delta += delta < 0 ? 256 : 0; + s = format (s, "%d", delta); + } + else + s = format (s, "-"); + + vlib_cli_output (vm, + "%=19U%=7d%=7d %3d/%-3d%=9v%=7s%=7s%=5s%=30U", + format_ethernet_address, key.fields.mac, + key.fields.bd_index, + result.fields.sw_if_index == ~0 + ? -1 : result.fields.sw_if_index, + result.fields.sn.bd, result.fields.sn.swif, + s, result.fields.static_mac ? "*" : "-", + result.fields.filter ? "*" : "-", + result.fields.bvi ? "*" : "-", + format_vnet_sw_if_index_name_with_NA, + msm->vnet_main, result.fields.sw_if_index); + vec_reset_length (s); + } + total_entries++; + } + v++; + } + } + + if (total_entries == 0) + vlib_cli_output (vm, "no l2fib entries"); + else + { + l2learn_main_t *lm = &l2learn_main; + vlib_cli_output (vm, "L2FIB total/learned entries: %d/%d " + "Last scan time: %.4esec Learn limit: %d ", + total_entries, lm->global_learn_count, + msm->age_scan_duration, lm->global_learn_limit); + if (lm->client_pid) + vlib_cli_output (vm, "L2MAC events client PID: %d " + "Last e-scan time: %.4esec Delay: %.2esec " + "Max macs in event: %d", + lm->client_pid, msm->evt_scan_duration, + msm->event_scan_delay, msm->max_macs_in_event); + } + + if (raw) + vlib_cli_output (vm, "Raw Hash Table:\n%U\n", + BV (format_bihash), h, 1 /* verbose */ ); + + vec_free (s); + return 0; +} + +/*? + * This command dispays the MAC Address entries of the L2 FIB table. + * Output can be filtered to just get the number of MAC Addresses or display + * each MAC Address for all bridge domains or just a single bridge domain. + * + * @cliexpar + * Example of how to display the number of MAC Address entries in the L2 + * FIB table: + * @cliexstart{show l2fib} + * 3 l2fib entries + * @cliexend + * Example of how to display all the MAC Address entries in the L2 + * FIB table: + * @cliexstart{show l2fib verbose} + * Mac Address BD Idx Interface Index static filter bvi refresh timestamp + * 52:54:00:53:18:33 1 GigabitEthernet0/8/0.200 3 0 0 0 0 0 + * 52:54:00:53:18:55 1 GigabitEthernet0/8/0.200 3 1 0 0 0 0 + * 52:54:00:53:18:77 1 N/A -1 1 1 0 0 0 + * 3 l2fib entries + * @cliexend +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (show_l2fib_cli, static) = { + .path = "show l2fib", + .short_help = "show l2fib [verbose | learn | bd_id <nn> | bd_index <nn> | raw", + .function = show_l2fib, +}; +/* *INDENT-ON* */ + + +/* Remove all entries from the l2fib */ +void +l2fib_clear_table (void) +{ + l2fib_main_t *mp = &l2fib_main; + + /* Remove all entries */ + BV (clib_bihash_free) (&mp->mac_table); + BV (clib_bihash_init) (&mp->mac_table, "l2fib mac table", + L2FIB_NUM_BUCKETS, L2FIB_MEMORY_SIZE); + l2learn_main.global_learn_count = 0; +} + +/** Clear all entries in L2FIB. + * @TODO: Later we may want a way to remove only the non-static entries + */ +static clib_error_t * +clear_l2fib (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + l2fib_clear_table (); + return 0; +} + +/*? + * This command clears all the MAC Address entries from the L2 FIB table. + * + * @cliexpar + * Example of how to clear the L2 FIB Table: + * @cliexcmd{clear l2fib} + * Example to show the L2 FIB Table has been cleared: + * @cliexstart{show l2fib verbose} + * no l2fib entries + * @cliexend +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (clear_l2fib_cli, static) = { + .path = "clear l2fib", + .short_help = "clear l2fib", + .function = clear_l2fib, +}; +/* *INDENT-ON* */ + +static inline l2fib_seq_num_t +l2fib_cur_seq_num (u32 bd_index, u32 sw_if_index) +{ + l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index); + /* *INDENT-OFF* */ + return (l2fib_seq_num_t) { + .swif = *l2fib_swif_seq_num (sw_if_index), + .bd = bd_config->seq_num, + }; + /* *INDENT-ON* */ +} + +/** + * Add an entry to the l2fib. + * If the entry already exists then overwrite it + */ +void +l2fib_add_entry (u64 mac, u32 bd_index, + u32 sw_if_index, u8 static_mac, u8 filter_mac, u8 bvi_mac) +{ + l2fib_entry_key_t key; + l2fib_entry_result_t result; + __attribute__ ((unused)) u32 bucket_contents; + l2fib_main_t *fm = &l2fib_main; + l2learn_main_t *lm = &l2learn_main; + BVT (clib_bihash_kv) kv; + + /* set up key */ + key.raw = l2fib_make_key ((u8 *) & mac, bd_index); + + /* check if entry alread exist */ + if (BV (clib_bihash_search) (&fm->mac_table, &kv, &kv)) + { + /* decrement counter if overwriting a learned mac */ + result.raw = kv.value; + if ((result.fields.age_not == 0) && (lm->global_learn_count)) + lm->global_learn_count--; + } + + /* set up result */ + result.raw = 0; /* clear all fields */ + result.fields.sw_if_index = sw_if_index; + result.fields.static_mac = static_mac; + result.fields.filter = filter_mac; + result.fields.bvi = bvi_mac; + result.fields.age_not = 1; /* no aging for provisioned entry */ + + kv.key = key.raw; + kv.value = result.raw; + + BV (clib_bihash_add_del) (&fm->mac_table, &kv, 1 /* is_add */ ); +} + +/** + * Add an entry to the L2FIB. + * The CLI format is: + * l2fib add <mac> <bd> <intf> [static] [bvi] + * l2fib add <mac> <bd> filter + * Note that filter and bvi entries are always static + */ +static clib_error_t * +l2fib_add (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + bd_main_t *bdm = &bd_main; + vnet_main_t *vnm = vnet_get_main (); + clib_error_t *error = 0; + u64 mac; + u32 bd_id; + u32 bd_index; + u32 sw_if_index = ~0; + u32 filter_mac = 0; + u32 static_mac = 0; + u32 bvi_mac = 0; + uword *p; + + if (!unformat_user (input, unformat_ethernet_address, &mac)) + { + error = clib_error_return (0, "expected mac address `%U'", + format_unformat_error, input); + goto done; + } + + if (!unformat (input, "%d", &bd_id)) + { + error = clib_error_return (0, "expected bridge domain ID `%U'", + format_unformat_error, input); + goto done; + } + + p = hash_get (bdm->bd_index_by_bd_id, bd_id); + if (!p) + { + error = clib_error_return (0, "bridge domain ID %d invalid", bd_id); + goto done; + } + bd_index = p[0]; + + if (unformat (input, "filter")) + { + filter_mac = 1; + static_mac = 1; + + } + else + { + + if (!unformat_user + (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) + { + error = clib_error_return (0, "unknown interface `%U'", + format_unformat_error, input); + goto done; + } + if (unformat (input, "static")) + { + static_mac = 1; + } + else if (unformat (input, "bvi")) + { + bvi_mac = 1; + static_mac = 1; + } + } + + if (vec_len (l2input_main.configs) <= sw_if_index) + { + error = clib_error_return (0, "Interface sw_if_index %d not in L2 mode", + sw_if_index); + goto done; + } + + if (filter_mac) + l2fib_add_filter_entry (mac, bd_index); + else + l2fib_add_fwd_entry (mac, bd_index, sw_if_index, static_mac, bvi_mac); + +done: + return error; +} + +/*? + * This command adds a MAC Address entry to the L2 FIB table + * of an existing bridge-domain. The MAC Address can be static + * or dynamic. This command also allows a filter to be added, + * such that packets with given MAC Addresses (source mac or + * destination mac match) are dropped. + * + * @cliexpar + * Example of how to add a dynamic MAC Address entry to the L2 FIB table + * of a bridge-domain (where 200 is the bridge-domain-id): + * @cliexcmd{l2fib add 52:54:00:53:18:33 200 GigabitEthernet0/8/0.200} + * Example of how to add a static MAC Address entry to the L2 FIB table + * of a bridge-domain (where 200 is the bridge-domain-id): + * @cliexcmd{l2fib add 52:54:00:53:18:55 200 GigabitEthernet0/8/0.200 static} + * Example of how to add a filter such that a packet with the given MAC + * Address will be dropped in a given bridge-domain (where 200 is the + * bridge-domain-id): + * @cliexcmd{l2fib add 52:54:00:53:18:77 200 filter} + * Example of show command of the provisioned MAC Addresses and filters: + * @cliexstart{show l2fib verbose} + * Mac Address BD Idx Interface Index static filter bvi refresh timestamp + * 52:54:00:53:18:33 1 GigabitEthernet0/8/0.200 3 0 0 0 0 0 + * 52:54:00:53:18:55 1 GigabitEthernet0/8/0.200 3 1 0 0 0 0 + * 52:54:00:53:18:77 1 N/A -1 1 1 0 0 0 + * 3 l2fib entries + * @cliexend +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (l2fib_add_cli, static) = { + .path = "l2fib add", + .short_help = "l2fib add <mac> <bridge-domain-id> filter | <intf> [static | bvi]", + .function = l2fib_add, +}; +/* *INDENT-ON* */ + + +static clib_error_t * +l2fib_test_command_fn (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + clib_error_t *error = 0; + u64 mac, save_mac; + u32 bd_index = 0; + u32 sw_if_index = 8; + u32 bvi_mac = 0; + u32 is_add = 0; + u32 is_del = 0; + u32 is_check = 0; + u32 count = 1; + int mac_set = 0; + int i; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "mac %U", unformat_ethernet_address, &mac)) + mac_set = 1; + else if (unformat (input, "add")) + is_add = 1; + else if (unformat (input, "del")) + is_del = 1; + else if (unformat (input, "check")) + is_check = 1; + else if (unformat (input, "count %d", &count)) + ; + else + break; + } + + if (mac_set == 0) + return clib_error_return (0, "mac not set"); + + if (is_add == 0 && is_del == 0 && is_check == 0) + return clib_error_return (0, + "noop: pick at least one of (add,del,check)"); + + save_mac = mac; + + if (is_add) + { + for (i = 0; i < count; i++) + { + u64 tmp; + l2fib_add_fwd_entry (mac, bd_index, sw_if_index, mac, bvi_mac); + tmp = clib_net_to_host_u64 (mac); + tmp >>= 16; + tmp++; + tmp <<= 16; + mac = clib_host_to_net_u64 (tmp); + } + } + + if (is_check) + { + BVT (clib_bihash_kv) kv; + l2fib_main_t *mp = &l2fib_main; + + mac = save_mac; + + for (i = 0; i < count; i++) + { + u64 tmp; + kv.key = l2fib_make_key ((u8 *) & mac, bd_index); + if (BV (clib_bihash_search) (&mp->mac_table, &kv, &kv)) + { + clib_warning ("key %U AWOL", format_ethernet_address, &mac); + break; + } + tmp = clib_net_to_host_u64 (mac); + tmp >>= 16; + tmp++; + tmp <<= 16; + mac = clib_host_to_net_u64 (tmp); + } + } + + if (is_del) + { + for (i = 0; i < count; i++) + { + u64 tmp; + + l2fib_del_entry (mac, bd_index); + + tmp = clib_net_to_host_u64 (mac); + tmp >>= 16; + tmp++; + tmp <<= 16; + mac = clib_host_to_net_u64 (tmp); + } + } + + return error; +} + +/*? + * The set of '<em>test l2fib</em>' commands allow the L2 FIB table of the default + * bridge domain (bridge-domain-id of 0) to be modified. + * + * @cliexpar + * @parblock + * Example of how to add a set of 4 sequential MAC Address entries to L2 + * FIB table of the default bridge-domain: + * @cliexcmd{test l2fib add mac 52:54:00:53:00:00 count 4} + * + * Show the set of 4 sequential MAC Address entries that were added: + * @cliexstart{show l2fib verbose} + * Mac Address BD Idx Interface Index static filter bvi refresh timestamp + * 52:54:00:53:00:00 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0 + * 52:54:00:53:00:01 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0 + * 52:54:00:53:00:03 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0 + * 52:54:00:53:00:02 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0 + * 4 l2fib entries + * @cliexend + * + * Example of how to check that the set of 4 sequential MAC Address + * entries were added to L2 FIB table of the default + * bridge-domain. Used a count of 5 to produce an error: + * + * @cliexcmd{test l2fib check mac 52:54:00:53:00:00 count 5} + * The output of the check command is in the log files. Log file + * location may vary based on your OS and Version: + * + * <b><em># tail -f /var/log/messages | grep l2fib_test_command_fn</em></b> + * + * Sep 7 17:15:24 localhost vnet[4952]: l2fib_test_command_fn:446: key 52:54:00:53:00:04 AWOL + * + * Example of how to delete a set of 4 sequential MAC Address entries + * from L2 FIB table of the default bridge-domain: + * @cliexcmd{test l2fib del mac 52:54:00:53:00:00 count 4} + * @endparblock +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (l2fib_test_command, static) = { + .path = "test l2fib", + .short_help = "test l2fib [add|del|check] mac <base-addr> count <nn>", + .function = l2fib_test_command_fn, +}; +/* *INDENT-ON* */ + + +/** + * Delete an entry from the l2fib. + * Return 0 if the entry was deleted, or 1 if it was not found + */ +static u32 +l2fib_del_entry_by_key (u64 raw_key) +{ + + l2fib_entry_result_t result; + l2fib_main_t *mp = &l2fib_main; + BVT (clib_bihash_kv) kv; + + /* set up key */ + kv.key = raw_key; + + if (BV (clib_bihash_search) (&mp->mac_table, &kv, &kv)) + return 1; + + result.raw = kv.value; + + /* decrement counter if dynamically learned mac */ + if ((result.fields.age_not == 0) && (l2learn_main.global_learn_count)) + l2learn_main.global_learn_count--; + + /* Remove entry from hash table */ + BV (clib_bihash_add_del) (&mp->mac_table, &kv, 0 /* is_add */ ); + return 0; +} + +/** + * Delete an entry from the l2fib. + * Return 0 if the entry was deleted, or 1 if it was not found + */ +u32 +l2fib_del_entry (u64 mac, u32 bd_index) +{ + return l2fib_del_entry_by_key (l2fib_make_key ((u8 *) & mac, bd_index)); +} + +/** + * Delete an entry from the L2FIB. + * The CLI format is: + * l2fib del <mac> <bd-id> + */ +static clib_error_t * +l2fib_del (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + bd_main_t *bdm = &bd_main; + clib_error_t *error = 0; + u64 mac; + u32 bd_id; + u32 bd_index; + uword *p; + + if (!unformat_user (input, unformat_ethernet_address, &mac)) + { + error = clib_error_return (0, "expected mac address `%U'", + format_unformat_error, input); + goto done; + } + + if (!unformat (input, "%d", &bd_id)) + { + error = clib_error_return (0, "expected bridge domain ID `%U'", + format_unformat_error, input); + goto done; + } + + p = hash_get (bdm->bd_index_by_bd_id, bd_id); + if (!p) + { + error = clib_error_return (0, "bridge domain ID %d invalid", bd_id); + goto done; + } + bd_index = p[0]; + + /* Delete the entry */ + if (l2fib_del_entry (mac, bd_index)) + { + error = clib_error_return (0, "mac entry not found"); + goto done; + } + +done: + return error; +} + +/*? + * This command deletes an existing MAC Address entry from the L2 FIB + * table of an existing bridge-domain. + * + * @cliexpar + * Example of how to delete a MAC Address entry from the L2 FIB table of a bridge-domain (where 200 is the bridge-domain-id): + * @cliexcmd{l2fib del 52:54:00:53:18:33 200} +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (l2fib_del_cli, static) = { + .path = "l2fib del", + .short_help = "l2fib del <mac> <bridge-domain-id>", + .function = l2fib_del, +}; +/* *INDENT-ON* */ + +/** + Kick off ager to scan MACs to age/delete MAC entries +*/ +void +l2fib_start_ager_scan (vlib_main_t * vm) +{ + uword evt = L2_MAC_AGE_PROCESS_EVENT_ONE_PASS; + + /* check if there is at least one bd with mac aging enabled */ + l2_bridge_domain_t *bd_config; + vec_foreach (bd_config, l2input_main.bd_configs) + { + if (bd_config->bd_id != ~0 && bd_config->mac_age != 0) + { + evt = L2_MAC_AGE_PROCESS_EVENT_START; + break; + } + } + + vlib_process_signal_event (vm, l2fib_mac_age_scanner_process_node.index, + evt, 0); +} + +/** + Flush all non static MACs from an interface +*/ +void +l2fib_flush_int_mac (vlib_main_t * vm, u32 sw_if_index) +{ + *l2fib_swif_seq_num (sw_if_index) += 1; + l2fib_start_ager_scan (vm); +} + +/** + Flush all non static MACs in a bridge domain +*/ +void +l2fib_flush_bd_mac (vlib_main_t * vm, u32 bd_index) +{ + l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index); + bd_config->seq_num += 1; + l2fib_start_ager_scan (vm); +} + +/** + Flush all non static MACs - flushes all valid BDs +*/ +void +l2fib_flush_all_mac (vlib_main_t * vm) +{ + l2_bridge_domain_t *bd_config; + vec_foreach (bd_config, l2input_main.bd_configs) + if (bd_is_valid (bd_config)) + bd_config->seq_num += 1; + + l2fib_start_ager_scan (vm); +} + + +/** + Flush MACs, except static ones, associated with an interface + The CLI format is: + l2fib flush-mac interface <if-name> +*/ +static clib_error_t * +l2fib_flush_mac_int (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + vnet_main_t *vnm = vnet_get_main (); + clib_error_t *error = 0; + u32 sw_if_index; + + if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) + { + error = clib_error_return (0, "unknown interface `%U'", + format_unformat_error, input); + goto done; + } + + l2fib_flush_int_mac (vm, sw_if_index); + +done: + return error; +} + +/** + Flush all MACs, except static ones + The CLI format is: + l2fib flush-mac all +*/ +static clib_error_t * +l2fib_flush_mac_all (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + l2fib_flush_all_mac (vm); + return 0; +} + +/*? + * This command kick off ager to delete all existing MAC Address entries, + * except static ones, associated with an interface from the L2 FIB table. + * + * @cliexpar + * Example of how to flush MAC Address entries learned on an interface from the L2 FIB table: + * @cliexcmd{l2fib flush-mac interface GigabitEthernet2/1/0} +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (l2fib_flush_mac_all_cli, static) = { + .path = "l2fib flush-mac all", + .short_help = "l2fib flush-mac all", + .function = l2fib_flush_mac_all, +}; +/* *INDENT-ON* */ + +/*? + * This command kick off ager to delete all existing MAC Address entries, + * except static ones, associated with an interface from the L2 FIB table. + * + * @cliexpar + * Example of how to flush MAC Address entries learned on an interface from the L2 FIB table: + * @cliexcmd{l2fib flush-mac interface GigabitEthernet2/1/0} +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (l2fib_flush_mac_int_cli, static) = { + .path = "l2fib flush-mac interface", + .short_help = "l2fib flush-mac interface <if-name>", + .function = l2fib_flush_mac_int, +}; +/* *INDENT-ON* */ + +/** + Flush bridge-domain MACs except static ones. + The CLI format is: + l2fib flush-mac bridge-domain <bd-id> +*/ +static clib_error_t * +l2fib_flush_mac_bd (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + bd_main_t *bdm = &bd_main; + clib_error_t *error = 0; + u32 bd_index, bd_id; + uword *p; + + if (!unformat (input, "%d", &bd_id)) + { + error = clib_error_return (0, "expecting bridge-domain id but got `%U'", + format_unformat_error, input); + goto done; + } + + p = hash_get (bdm->bd_index_by_bd_id, bd_id); + if (p) + bd_index = *p; + else + return clib_error_return (0, "No such bridge domain %d", bd_id); + + l2fib_flush_bd_mac (vm, bd_index); + +done: + return error; +} + +/*? + * This command kick off ager to delete all existing MAC Address entries, + * except static ones, in a bridge domain from the L2 FIB table. + * + * @cliexpar + * Example of how to flush MAC Address entries learned in a bridge domain from the L2 FIB table: + * @cliexcmd{l2fib flush-mac bridge-domain 1000} +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (l2fib_flush_mac_bd_cli, static) = { + .path = "l2fib flush-mac bridge-domain", + .short_help = "l2fib flush-mac bridge-domain <bd-id>", + .function = l2fib_flush_mac_bd, +}; +/* *INDENT-ON* */ + +clib_error_t * +l2fib_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags) +{ + l2_input_config_t *config = l2input_intf_config (sw_if_index); + if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) == 0 && config->bridge) + l2fib_flush_int_mac (vnm->vlib_main, sw_if_index); + return 0; +} + +VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (l2fib_sw_interface_up_down); + +BVT (clib_bihash) * get_mac_table (void) +{ + l2fib_main_t *mp = &l2fib_main; + return &mp->mac_table; +} + +static_always_inline void * +allocate_mac_evt_buf (u32 client, u32 client_index) +{ + l2fib_main_t *fm = &l2fib_main; + vl_api_l2_macs_event_t *mp = vl_msg_api_alloc + (sizeof (*mp) + (fm->max_macs_in_event * sizeof (vl_api_mac_entry_t))); + mp->_vl_msg_id = htons (VL_API_L2_MACS_EVENT); + mp->pid = htonl (client); + mp->client_index = client_index; + return mp; +} + +static_always_inline f64 +l2fib_scan (vlib_main_t * vm, f64 start_time, u8 event_only) +{ + l2fib_main_t *fm = &l2fib_main; + l2learn_main_t *lm = &l2learn_main; + + BVT (clib_bihash) * h = &fm->mac_table; + int i, j, k; + f64 last_start = start_time; + f64 accum_t = 0; + f64 delta_t = 0; + u32 evt_idx = 0; + u32 learn_count = 0; + u32 client = lm->client_pid; + u32 cl_idx = lm->client_index; + vl_api_l2_macs_event_t *mp = 0; + unix_shared_memory_queue_t *q = 0; + + if (client) + { + mp = allocate_mac_evt_buf (client, cl_idx); + q = vl_api_client_index_to_input_queue (lm->client_index); + } + + for (i = 0; i < h->nbuckets; i++) + { + /* allow no more than 20us without a pause */ + delta_t = vlib_time_now (vm) - last_start; + if (delta_t > 20e-6) + { + vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */ + last_start = vlib_time_now (vm); + accum_t += delta_t; + } + + if (i < (h->nbuckets - 3)) + { + BVT (clib_bihash_bucket) * b = &h->buckets[i + 3]; + CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD); + b = &h->buckets[i + 1]; + if (b->offset) + { + BVT (clib_bihash_value) * v = + BV (clib_bihash_get_value) (h, b->offset); + CLIB_PREFETCH (v, CLIB_CACHE_LINE_BYTES, LOAD); + } + } + + BVT (clib_bihash_bucket) * b = &h->buckets[i]; + if (b->offset == 0) + continue; + BVT (clib_bihash_value) * v = BV (clib_bihash_get_value) (h, b->offset); + for (j = 0; j < (1 << b->log2_pages); j++) + { + for (k = 0; k < BIHASH_KVP_PER_PAGE; k++) + { + if (v->kvp[k].key == ~0ULL && v->kvp[k].value == ~0ULL) + continue; + + l2fib_entry_key_t key = {.raw = v->kvp[k].key }; + l2fib_entry_result_t result = {.raw = v->kvp[k].value }; + + if (result.fields.age_not == 0) + learn_count++; + + if (client) + { + if (PREDICT_FALSE (evt_idx >= fm->max_macs_in_event)) + { + /* event message full, send it and start a new one */ + if (q && (q->cursize < q->maxsize)) + { + mp->n_macs = htonl (evt_idx); + vl_msg_api_send_shmem (q, (u8 *) & mp); + mp = allocate_mac_evt_buf (client, cl_idx); + } + else + { + clib_warning ("MAC event to pid %d queue stuffed!" + " %d MAC entries lost", client, + evt_idx); + } + evt_idx = 0; + } + + if (result.fields.lrn_evt) + { + /* copy mac entry to event msg */ + clib_memcpy (mp->mac[evt_idx].mac_addr, key.fields.mac, + 6); + mp->mac[evt_idx].is_del = 0; + mp->mac[evt_idx].sw_if_index = + htonl (result.fields.sw_if_index); + /* clear event bit and update mac entry */ + result.fields.lrn_evt = 0; + BVT (clib_bihash_kv) kv; + kv.key = key.raw; + kv.value = result.raw; + BV (clib_bihash_add_del) (&fm->mac_table, &kv, 1); + evt_idx++; + continue; /* skip aging */ + } + } + + if (event_only || result.fields.age_not) + continue; /* skip aging - static_mac alsways age_not */ + + /* start aging processing */ + u32 bd_index = key.fields.bd_index; + u32 sw_if_index = result.fields.sw_if_index; + u16 sn = l2fib_cur_seq_num (bd_index, sw_if_index).as_u16; + if (result.fields.sn.as_u16 != sn) + goto age_out; /* stale mac */ + + l2_bridge_domain_t *bd_config = + vec_elt_at_index (l2input_main.bd_configs, bd_index); + + if (bd_config->mac_age == 0) + continue; /* skip aging */ + + i16 delta = (u8) (start_time / 60) - result.fields.timestamp; + delta += delta < 0 ? 256 : 0; + + if (delta < bd_config->mac_age) + continue; /* still valid */ + + age_out: + if (client) + { + /* copy mac entry to event msg */ + clib_memcpy (mp->mac[evt_idx].mac_addr, key.fields.mac, 6); + mp->mac[evt_idx].is_del = 1; + mp->mac[evt_idx].sw_if_index = + htonl (result.fields.sw_if_index); + evt_idx++; + } + /* delete mac entry */ + BVT (clib_bihash_kv) kv; + kv.key = key.raw; + BV (clib_bihash_add_del) (&fm->mac_table, &kv, 0); + learn_count--; + } + v++; + } + } + + /* keep learn count consistent */ + l2learn_main.global_learn_count = learn_count; + + if (mp) + { + /* send any outstanding mac event message else free message buffer */ + if (evt_idx) + { + if (q && (q->cursize < q->maxsize)) + { + mp->n_macs = htonl (evt_idx); + vl_msg_api_send_shmem (q, (u8 *) & mp); + } + else + { + clib_warning ("MAC event to pid %d queue stuffed!" + " %d MAC entries lost", client, evt_idx); + vl_msg_api_free (mp); + } + } + else + vl_msg_api_free (mp); + } + return delta_t + accum_t; +} + +/* Maximum f64 value */ +#define TIME_MAX (1.7976931348623157e+308) + +static uword +l2fib_mac_age_scanner_process (vlib_main_t * vm, vlib_node_runtime_t * rt, + vlib_frame_t * f) +{ + uword event_type, *event_data = 0; + l2fib_main_t *fm = &l2fib_main; + l2learn_main_t *lm = &l2learn_main; + bool enabled = 0; + f64 start_time, next_age_scan_time = TIME_MAX; + + while (1) + { + if (lm->client_pid) + vlib_process_wait_for_event_or_clock (vm, fm->event_scan_delay); + else if (enabled) + { + f64 t = next_age_scan_time - vlib_time_now (vm); + vlib_process_wait_for_event_or_clock (vm, t); + } + else + vlib_process_wait_for_event (vm); + + event_type = vlib_process_get_events (vm, &event_data); + vec_reset_length (event_data); + + start_time = vlib_time_now (vm); + enum + { SCAN_MAC_AGE, SCAN_MAC_EVENT, SCAN_DISABLE } scan = SCAN_MAC_AGE; + + switch (event_type) + { + case ~0: /* timer expired */ + if (lm->client_pid != 0 && start_time < next_age_scan_time) + scan = SCAN_MAC_EVENT; + break; + + case L2_MAC_AGE_PROCESS_EVENT_START: + enabled = 1; + break; + + case L2_MAC_AGE_PROCESS_EVENT_STOP: + enabled = 0; + scan = SCAN_DISABLE; + break; + + case L2_MAC_AGE_PROCESS_EVENT_ONE_PASS: + break; + + default: + ASSERT (0); + } + + if (scan == SCAN_MAC_EVENT) + l2fib_main.evt_scan_duration = l2fib_scan (vm, start_time, 1); + else + { + if (scan == SCAN_MAC_AGE) + l2fib_main.age_scan_duration = l2fib_scan (vm, start_time, 0); + if (scan == SCAN_DISABLE) + { + l2fib_main.age_scan_duration = 0; + l2fib_main.evt_scan_duration = 0; + } + /* schedule next scan */ + if (enabled) + next_age_scan_time = start_time + L2FIB_AGE_SCAN_INTERVAL; + else + next_age_scan_time = TIME_MAX; + } + } + return 0; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (l2fib_mac_age_scanner_process_node) = { + .function = l2fib_mac_age_scanner_process, + .type = VLIB_NODE_TYPE_PROCESS, + .name = "l2fib-mac-age-scanner-process", +}; +/* *INDENT-ON* */ + +clib_error_t * +l2fib_init (vlib_main_t * vm) +{ + l2fib_main_t *mp = &l2fib_main; + l2fib_entry_key_t test_key; + u8 test_mac[6]; + + mp->vlib_main = vm; + mp->vnet_main = vnet_get_main (); + + /* Create the hash table */ + BV (clib_bihash_init) (&mp->mac_table, "l2fib mac table", + L2FIB_NUM_BUCKETS, L2FIB_MEMORY_SIZE); + + /* verify the key constructor is good, since it is endian-sensitive */ + memset (test_mac, 0, sizeof (test_mac)); + test_mac[0] = 0x11; + test_key.raw = 0; + test_key.raw = l2fib_make_key ((u8 *) & test_mac, 0x1234); + ASSERT (test_key.fields.mac[0] == 0x11); + ASSERT (test_key.fields.bd_index == 0x1234); + + return 0; +} + +VLIB_INIT_FUNCTION (l2fib_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |