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|
/*
* 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 <vlib/vlib.h>
#include <vnet/mfib/mfib_entry.h>
#include <vnet/mfib/mfib_entry_src.h>
#include <vnet/mfib/mfib_entry_cover.h>
#include <vnet/fib/fib_path_list.h>
#include <vnet/fib/fib_walk.h>
#include <vnet/dpo/drop_dpo.h>
#include <vnet/dpo/replicate_dpo.h>
/**
* the logger
*/
vlib_log_class_t mfib_entry_logger;
/**
* Pool of path extensions
*/
static mfib_path_ext_t *mfib_path_ext_pool;
/**
* String names for each source
*/
static const char *mfib_source_names[] = MFIB_SOURCE_NAMES;
/*
* Pool for all fib_entries
*/
mfib_entry_t *mfib_entry_pool;
static fib_node_t *
mfib_entry_get_node (fib_node_index_t index)
{
return ((fib_node_t*)mfib_entry_get(index));
}
static fib_protocol_t
mfib_entry_get_proto (const mfib_entry_t * mfib_entry)
{
return (mfib_entry->mfe_prefix.fp_proto);
}
fib_forward_chain_type_t
mfib_entry_get_default_chain_type (const mfib_entry_t *mfib_entry)
{
switch (mfib_entry->mfe_prefix.fp_proto)
{
case FIB_PROTOCOL_IP4:
return (FIB_FORW_CHAIN_TYPE_MCAST_IP4);
case FIB_PROTOCOL_IP6:
return (FIB_FORW_CHAIN_TYPE_MCAST_IP6);
case FIB_PROTOCOL_MPLS:
ASSERT(0);
break;
}
return (FIB_FORW_CHAIN_TYPE_MCAST_IP4);
}
static u8 *
format_mfib_entry_dpo (u8 * s, va_list * args)
{
index_t fei = va_arg(*args, index_t);
CLIB_UNUSED(u32 indent) = va_arg(*args, u32);
return (format(s, "%U",
format_mfib_entry, fei,
MFIB_ENTRY_FORMAT_BRIEF));
}
static inline mfib_path_ext_t *
mfib_entry_path_ext_get (index_t mi)
{
return (pool_elt_at_index(mfib_path_ext_pool, mi));
}
static u8 *
format_mfib_entry_path_ext (u8 * s, va_list * args)
{
mfib_path_ext_t *path_ext;
index_t mpi = va_arg(*args, index_t);
path_ext = mfib_entry_path_ext_get(mpi);
return (format(s, "path:%d flags:%U",
path_ext->mfpe_path,
format_mfib_itf_flags, path_ext->mfpe_flags));
}
u8 *
format_mfib_entry (u8 * s, va_list * args)
{
fib_node_index_t fei, mfi;
mfib_entry_t *mfib_entry;
mfib_entry_src_t *msrc;
u32 sw_if_index;
int level;
fei = va_arg (*args, fib_node_index_t);
level = va_arg (*args, int);
mfib_entry = mfib_entry_get(fei);
s = format (s, "%U", format_mfib_prefix, &mfib_entry->mfe_prefix);
s = format (s, ": %U", format_mfib_entry_flags, mfib_entry->mfe_flags);
if (level >= MFIB_ENTRY_FORMAT_DETAIL)
{
fib_node_index_t path_index, mpi;
s = format (s, "\n");
s = format (s, " fib:%d", mfib_entry->mfe_fib_index);
s = format (s, " index:%d", mfib_entry_get_index(mfib_entry));
s = format (s, " locks:%d\n", mfib_entry->mfe_node.fn_locks);
vec_foreach(msrc, mfib_entry->mfe_srcs)
{
s = format (s, " src:%s locks:%d:",
mfib_source_names[msrc->mfes_src],
msrc->mfes_ref_count);
if (msrc->mfes_cover != FIB_NODE_INDEX_INVALID)
{
s = format (s, " cover:%d", msrc->mfes_cover);
}
s = format (s, " %U\n", format_mfib_entry_flags, msrc->mfes_flags);
if (FIB_NODE_INDEX_INVALID != msrc->mfes_pl)
{
s = fib_path_list_format(msrc->mfes_pl, s);
}
s = format (s, " Extensions:\n");
hash_foreach(path_index, mpi, msrc->mfes_exts,
({
s = format(s, " %U\n", format_mfib_entry_path_ext, mpi);
}));
s = format (s, " Interface-Forwarding:\n");
hash_foreach(sw_if_index, mfi, msrc->mfes_itfs,
({
s = format(s, " %U\n", format_mfib_itf, mfi);
}));
}
}
s = format(s, "\n Interfaces:");
hash_foreach(sw_if_index, mfi, mfib_entry->mfe_itfs,
({
s = format(s, "\n %U", format_mfib_itf, mfi);
}));
if (MFIB_RPF_ID_NONE != mfib_entry->mfe_rpf_id)
{
s = format(s, "\n RPF-ID:%d", mfib_entry->mfe_rpf_id);
}
s = format(s, "\n %U-chain\n %U",
format_fib_forw_chain_type,
mfib_entry_get_default_chain_type(mfib_entry),
format_dpo_id,
&mfib_entry->mfe_rep,
2);
s = format(s, "\n");
if (level >= MFIB_ENTRY_FORMAT_DETAIL2)
{
s = format(s, "\nchildren:");
s = fib_node_children_format(mfib_entry->mfe_node.fn_children, s);
}
return (s);
}
static mfib_entry_t*
mfib_entry_from_fib_node (fib_node_t *node)
{
ASSERT(FIB_NODE_TYPE_MFIB_ENTRY == node->fn_type);
return ((mfib_entry_t*)node);
}
static int
mfib_entry_src_cmp_for_sort (void * v1,
void * v2)
{
mfib_entry_src_t *esrc1 = v1, *esrc2 = v2;
return (esrc1->mfes_src - esrc2->mfes_src);
}
static void
mfib_entry_src_init (mfib_entry_t *mfib_entry,
mfib_source_t source)
{
mfib_entry_src_t esrc = {
.mfes_pl = FIB_NODE_INDEX_INVALID,
.mfes_flags = MFIB_ENTRY_FLAG_NONE,
.mfes_src = source,
.mfes_cover = FIB_NODE_INDEX_INVALID,
.mfes_sibling = FIB_NODE_INDEX_INVALID,
.mfes_ref_count = 1,
};
vec_add1(mfib_entry->mfe_srcs, esrc);
vec_sort_with_function(mfib_entry->mfe_srcs,
mfib_entry_src_cmp_for_sort);
}
static mfib_entry_src_t *
mfib_entry_src_find (const mfib_entry_t *mfib_entry,
mfib_source_t source,
u32 *index)
{
mfib_entry_src_t *esrc;
int ii;
ii = 0;
vec_foreach(esrc, mfib_entry->mfe_srcs)
{
if (esrc->mfes_src == source)
{
if (NULL != index)
{
*index = ii;
}
return (esrc);
}
else
{
ii++;
}
}
return (NULL);
}
static mfib_entry_src_t *
mfib_entry_src_find_or_create (mfib_entry_t *mfib_entry,
mfib_source_t source)
{
mfib_entry_src_t *msrc;
msrc = mfib_entry_src_find(mfib_entry, source, NULL);
if (NULL == msrc)
{
mfib_entry_src_init(mfib_entry, source);
msrc = mfib_entry_src_find(mfib_entry, source, NULL);
}
return (msrc);
}
static mfib_entry_src_t *
mfib_entry_src_update (mfib_entry_t *mfib_entry,
mfib_source_t source,
fib_rpf_id_t rpf_id,
mfib_entry_flags_t entry_flags)
{
mfib_entry_src_t *msrc;
msrc = mfib_entry_src_find_or_create(mfib_entry, source);
msrc->mfes_flags = entry_flags;
msrc->mfes_rpf_id = rpf_id;
return (msrc);
}
static mfib_entry_src_t *
mfib_entry_src_update_and_lock (mfib_entry_t *mfib_entry,
mfib_source_t source,
fib_rpf_id_t rpf_id,
mfib_entry_flags_t entry_flags)
{
mfib_entry_src_t *msrc;
msrc = mfib_entry_src_update(mfib_entry, source, rpf_id, entry_flags);
msrc->mfes_ref_count++;
return (msrc);
}
mfib_entry_src_t*
mfib_entry_get_best_src (const mfib_entry_t *mfib_entry)
{
mfib_entry_src_t *bsrc;
/*
* the enum of sources is deliberately arranged in priority order
*/
if (0 == vec_len(mfib_entry->mfe_srcs))
{
bsrc = NULL;
}
else
{
bsrc = vec_elt_at_index(mfib_entry->mfe_srcs, 0);
}
return (bsrc);
}
static mfib_source_t
mfib_entry_get_best_source (const mfib_entry_t *mfib_entry)
{
mfib_entry_src_t *bsrc;
bsrc = mfib_entry_get_best_src(mfib_entry);
return (bsrc->mfes_src);
}
int
mfib_entry_is_sourced (fib_node_index_t mfib_entry_index,
mfib_source_t source)
{
mfib_entry_t *mfib_entry;
mfib_entry = mfib_entry_get(mfib_entry_index);
return (NULL != mfib_entry_src_find(mfib_entry, source, NULL));
}
int
mfib_entry_is_host (fib_node_index_t mfib_entry_index)
{
return (mfib_prefix_is_host(mfib_entry_get_prefix(mfib_entry_index)));
}
static void
mfib_entry_src_flush (mfib_entry_src_t *msrc)
{
u32 sw_if_index;
index_t mfii;
hash_foreach(sw_if_index, mfii, msrc->mfes_itfs,
({
mfib_itf_delete(mfib_itf_get(mfii));
}));
hash_free(msrc->mfes_itfs);
msrc->mfes_itfs = NULL;
fib_path_list_unlock(msrc->mfes_pl);
}
static void
mfib_entry_src_remove (mfib_entry_t *mfib_entry,
mfib_source_t source)
{
mfib_entry_src_t *msrc;
u32 index = ~0;
msrc = mfib_entry_src_find(mfib_entry, source, &index);
if (NULL != msrc)
{
ASSERT(0 != msrc->mfes_ref_count);
msrc->mfes_ref_count--;
if (0 == msrc->mfes_ref_count)
{
mfib_entry_src_deactivate(mfib_entry, msrc);
mfib_entry_src_flush(msrc);
vec_del1(mfib_entry->mfe_srcs, index);
if (vec_len (mfib_entry->mfe_srcs) > 1)
vec_sort_with_function(mfib_entry->mfe_srcs,
mfib_entry_src_cmp_for_sort);
}
}
}
u32
mfib_entry_child_add (fib_node_index_t mfib_entry_index,
fib_node_type_t child_type,
fib_node_index_t child_index)
{
return (fib_node_child_add(FIB_NODE_TYPE_MFIB_ENTRY,
mfib_entry_index,
child_type,
child_index));
};
void
mfib_entry_child_remove (fib_node_index_t mfib_entry_index,
u32 sibling_index)
{
fib_node_child_remove(FIB_NODE_TYPE_MFIB_ENTRY,
mfib_entry_index,
sibling_index);
}
static mfib_entry_t *
mfib_entry_alloc (u32 fib_index,
const mfib_prefix_t *prefix,
fib_node_index_t *mfib_entry_index)
{
mfib_entry_t *mfib_entry;
pool_get_aligned(mfib_entry_pool, mfib_entry, CLIB_CACHE_LINE_BYTES);
fib_node_init(&mfib_entry->mfe_node,
FIB_NODE_TYPE_MFIB_ENTRY);
/*
* Some of the members require non-default initialisation
* so we also init those that don't and thus save on the call to clib_memset.
*/
mfib_entry->mfe_flags = 0;
mfib_entry->mfe_fib_index = fib_index;
mfib_entry->mfe_prefix = *prefix;
mfib_entry->mfe_srcs = NULL;
mfib_entry->mfe_itfs = NULL;
mfib_entry->mfe_rpf_id = MFIB_RPF_ID_NONE;
mfib_entry->mfe_pl = FIB_NODE_INDEX_INVALID;
dpo_reset(&mfib_entry->mfe_rep);
*mfib_entry_index = mfib_entry_get_index(mfib_entry);
MFIB_ENTRY_DBG(mfib_entry, "alloc");
return (mfib_entry);
}
static inline mfib_path_ext_t *
mfib_entry_path_ext_find (mfib_path_ext_t *exts,
fib_node_index_t path_index)
{
uword *p;
p = hash_get(exts, path_index);
if (NULL != p)
{
return (mfib_entry_path_ext_get(p[0]));
}
return (NULL);
}
static mfib_path_ext_t*
mfib_path_ext_add (mfib_entry_src_t *msrc,
fib_node_index_t path_index,
mfib_itf_flags_t mfi_flags)
{
mfib_path_ext_t *path_ext;
pool_get(mfib_path_ext_pool, path_ext);
path_ext->mfpe_flags = mfi_flags;
path_ext->mfpe_path = path_index;
hash_set(msrc->mfes_exts, path_index,
path_ext - mfib_path_ext_pool);
return (path_ext);
}
static void
mfib_path_ext_remove (mfib_entry_src_t *msrc,
fib_node_index_t path_index)
{
mfib_path_ext_t *path_ext;
path_ext = mfib_entry_path_ext_find(msrc->mfes_exts, path_index);
hash_unset(msrc->mfes_exts, path_index);
pool_put(mfib_path_ext_pool, path_ext);
}
typedef struct mfib_entry_collect_forwarding_ctx_t_
{
load_balance_path_t * next_hops;
fib_forward_chain_type_t fct;
mfib_entry_src_t *msrc;
} mfib_entry_collect_forwarding_ctx_t;
static fib_path_list_walk_rc_t
mfib_entry_src_collect_forwarding (fib_node_index_t pl_index,
fib_node_index_t path_index,
void *arg)
{
mfib_entry_collect_forwarding_ctx_t *ctx;
load_balance_path_t *nh;
ctx = arg;
/*
* if the path is not resolved, don't include it.
*/
if (!fib_path_is_resolved(path_index))
{
return (FIB_PATH_LIST_WALK_CONTINUE);
}
/*
* If the path is not forwarding to use it
*/
mfib_path_ext_t *path_ext;
path_ext = mfib_entry_path_ext_find(ctx->msrc->mfes_exts,
path_index);
if (NULL != path_ext &&
!(path_ext->mfpe_flags & MFIB_ITF_FLAG_FORWARD))
{
return (FIB_PATH_LIST_WALK_CONTINUE);
}
switch (ctx->fct)
{
case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
/*
* EOS traffic with no label to stack, we need the IP Adj
*/
vec_add2(ctx->next_hops, nh, 1);
nh->path_index = path_index;
nh->path_weight = fib_path_get_weight(path_index);
fib_path_contribute_forwarding(path_index, ctx->fct, &nh->path_dpo);
break;
case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
case FIB_FORW_CHAIN_TYPE_ETHERNET:
case FIB_FORW_CHAIN_TYPE_NSH:
case FIB_FORW_CHAIN_TYPE_BIER:
ASSERT(0);
break;
}
return (FIB_PATH_LIST_WALK_CONTINUE);
}
static void
mfib_entry_stack (mfib_entry_t *mfib_entry,
mfib_entry_src_t *msrc)
{
dpo_proto_t dp;
dp = fib_proto_to_dpo(mfib_entry_get_proto(mfib_entry));
/*
* unlink the enty from the previous path list.
*/
if (FIB_NODE_INDEX_INVALID != mfib_entry->mfe_pl)
{
fib_path_list_child_remove(mfib_entry->mfe_pl,
mfib_entry->mfe_sibling);
}
if (NULL != msrc)
{
mfib_entry_collect_forwarding_ctx_t ctx = {
.next_hops = NULL,
.fct = mfib_entry_get_default_chain_type(mfib_entry),
.msrc = msrc,
};
/*
* link the entry to the path-list.
* The entry needs to be a child so that we receive the back-walk
* updates to recalculate forwarding.
*/
mfib_entry->mfe_pl = msrc->mfes_pl;
mfib_entry->mfe_flags = msrc->mfes_flags;
mfib_entry->mfe_itfs = msrc->mfes_itfs;
mfib_entry->mfe_rpf_id = msrc->mfes_rpf_id;
if (FIB_NODE_INDEX_INVALID != mfib_entry->mfe_pl)
{
mfib_entry->mfe_sibling =
fib_path_list_child_add(mfib_entry->mfe_pl,
FIB_NODE_TYPE_MFIB_ENTRY,
mfib_entry_get_index(mfib_entry));
fib_path_list_walk(mfib_entry->mfe_pl,
mfib_entry_src_collect_forwarding,
&ctx);
}
if (!(MFIB_ENTRY_FLAG_EXCLUSIVE & mfib_entry->mfe_flags))
{
if (NULL == ctx.next_hops)
{
/*
* no next-hops, stack directly on the drop
*/
dpo_stack(DPO_MFIB_ENTRY, dp,
&mfib_entry->mfe_rep,
drop_dpo_get(dp));
}
else
{
/*
* each path contirbutes a next-hop. form a replicate
* from those choices.
*/
if (!dpo_id_is_valid(&mfib_entry->mfe_rep) ||
dpo_is_drop(&mfib_entry->mfe_rep))
{
dpo_id_t tmp_dpo = DPO_INVALID;
dpo_set(&tmp_dpo,
DPO_REPLICATE, dp,
replicate_create(0, dp));
dpo_stack(DPO_MFIB_ENTRY, dp,
&mfib_entry->mfe_rep,
&tmp_dpo);
dpo_reset(&tmp_dpo);
}
replicate_multipath_update(&mfib_entry->mfe_rep,
ctx.next_hops);
}
}
else
{
/*
* for exclusive routes the source provided a replicate DPO
* which we stashed in the special path list with one path,
* so we can stack directly on that.
*/
ASSERT(1 == vec_len(ctx.next_hops));
if (NULL != ctx.next_hops)
{
dpo_stack(DPO_MFIB_ENTRY, dp,
&mfib_entry->mfe_rep,
&ctx.next_hops[0].path_dpo);
dpo_reset(&ctx.next_hops[0].path_dpo);
vec_free(ctx.next_hops);
}
else
{
dpo_stack(DPO_MFIB_ENTRY, dp,
&mfib_entry->mfe_rep,
drop_dpo_get(dp));
}
}
}
else
{
dpo_stack(DPO_MFIB_ENTRY, dp,
&mfib_entry->mfe_rep,
drop_dpo_get(dp));
}
/*
* time for walkies fido.
*/
fib_node_back_walk_ctx_t bw_ctx = {
.fnbw_reason = FIB_NODE_BW_REASON_FLAG_EVALUATE,
};
fib_walk_sync(FIB_NODE_TYPE_MFIB_ENTRY,
mfib_entry_get_index(mfib_entry),
&bw_ctx);
}
static fib_node_index_t
mfib_entry_src_path_add (mfib_entry_src_t *msrc,
const fib_route_path_t *rpath)
{
fib_node_index_t path_index;
fib_route_path_t *rpaths;
ASSERT(!(MFIB_ENTRY_FLAG_EXCLUSIVE & msrc->mfes_flags));
/*
* path-lists require a vector of paths
*/
rpaths = NULL;
vec_add1(rpaths, rpath[0]);
if (FIB_NODE_INDEX_INVALID == msrc->mfes_pl)
{
/* A non-shared path-list */
msrc->mfes_pl = fib_path_list_create(FIB_PATH_LIST_FLAG_NO_URPF,
NULL);
fib_path_list_lock(msrc->mfes_pl);
}
path_index = fib_path_list_path_add(msrc->mfes_pl, rpaths);
vec_free(rpaths);
return (path_index);
}
static fib_node_index_t
mfib_entry_src_path_remove (mfib_entry_src_t *msrc,
const fib_route_path_t *rpath)
{
fib_node_index_t path_index;
fib_route_path_t *rpaths;
ASSERT(!(MFIB_ENTRY_FLAG_EXCLUSIVE & msrc->mfes_flags));
/*
* path-lists require a vector of paths
*/
rpaths = NULL;
vec_add1(rpaths, rpath[0]);
path_index = fib_path_list_path_remove(msrc->mfes_pl, rpaths);
vec_free(rpaths);
return (path_index);
}
static void
mfib_entry_recalculate_forwarding (mfib_entry_t *mfib_entry,
mfib_source_t old_best)
{
mfib_entry_src_t *bsrc, *osrc;
/*
* copy the forwarding data from the bast source
*/
bsrc = mfib_entry_get_best_src(mfib_entry);
osrc = mfib_entry_src_find(mfib_entry, old_best, NULL);
if (NULL != bsrc)
{
if (bsrc->mfes_src != old_best)
{
/*
* we are changing from one source to another
* deactivate the old, and activate the new
*/
mfib_entry_src_deactivate(mfib_entry, osrc);
mfib_entry_src_activate(mfib_entry, bsrc);
}
}
else
{
mfib_entry_src_deactivate(mfib_entry, osrc);
}
mfib_entry_stack(mfib_entry, bsrc);
mfib_entry_cover_update_notify(mfib_entry);
}
fib_node_index_t
mfib_entry_create (u32 fib_index,
mfib_source_t source,
const mfib_prefix_t *prefix,
fib_rpf_id_t rpf_id,
mfib_entry_flags_t entry_flags,
index_t repi)
{
fib_node_index_t mfib_entry_index;
mfib_entry_t *mfib_entry;
mfib_entry_src_t *msrc;
mfib_entry = mfib_entry_alloc(fib_index, prefix,
&mfib_entry_index);
msrc = mfib_entry_src_update(mfib_entry, source,
rpf_id, entry_flags);
if (INDEX_INVALID != repi)
{
/*
* The source is providing its own replicate DPO.
* Create a sepcial path-list to manage it, that way
* this entry and the source are equivalent to a normal
* entry
*/
fib_node_index_t old_pl_index;
dpo_proto_t dp;
dpo_id_t dpo = DPO_INVALID;
dp = fib_proto_to_dpo(mfib_entry_get_proto(mfib_entry));
old_pl_index = msrc->mfes_pl;
dpo_set(&dpo, DPO_REPLICATE, dp, repi);
msrc->mfes_pl =
fib_path_list_create_special(dp,
FIB_PATH_LIST_FLAG_EXCLUSIVE,
&dpo);
dpo_reset(&dpo);
fib_path_list_lock(msrc->mfes_pl);
fib_path_list_unlock(old_pl_index);
}
mfib_entry_recalculate_forwarding(mfib_entry, MFIB_SOURCE_NONE);
return (mfib_entry_index);
}
static int
mfib_entry_ok_for_delete (mfib_entry_t *mfib_entry)
{
return (0 == vec_len(mfib_entry->mfe_srcs));
}
static int
mfib_entry_src_ok_for_delete (const mfib_entry_src_t *msrc)
{
return ((INDEX_INVALID == msrc->mfes_cover &&
MFIB_ENTRY_FLAG_NONE == msrc->mfes_flags &&
0 == fib_path_list_get_n_paths(msrc->mfes_pl)));
}
static void
mfib_entry_update_i (mfib_entry_t *mfib_entry,
mfib_entry_src_t *msrc,
mfib_source_t current_best,
index_t repi)
{
if (INDEX_INVALID != repi)
{
/*
* The source is providing its own replicate DPO.
* Create a sepcial path-list to manage it, that way
* this entry and the source are equivalent to a normal
* entry
*/
fib_node_index_t old_pl_index;
dpo_proto_t dp;
dpo_id_t dpo = DPO_INVALID;
dp = fib_proto_to_dpo(mfib_entry_get_proto(mfib_entry));
old_pl_index = msrc->mfes_pl;
dpo_set(&dpo, DPO_REPLICATE, dp, repi);
msrc->mfes_pl =
fib_path_list_create_special(dp,
FIB_PATH_LIST_FLAG_EXCLUSIVE,
&dpo);
dpo_reset(&dpo);
fib_path_list_lock(msrc->mfes_pl);
fib_path_list_unlock(old_pl_index);
}
if (mfib_entry_src_ok_for_delete(msrc))
{
/*
* this source has no interfaces and no flags.
* it has nothing left to give - remove it
*/
mfib_entry_src_remove(mfib_entry, msrc->mfes_src);
}
mfib_entry_recalculate_forwarding(mfib_entry, current_best);
}
int
mfib_entry_special_add (fib_node_index_t mfib_entry_index,
mfib_source_t source,
mfib_entry_flags_t entry_flags,
fib_rpf_id_t rpf_id,
index_t repi)
{
mfib_source_t current_best;
mfib_entry_t *mfib_entry;
mfib_entry_src_t *msrc;
mfib_entry = mfib_entry_get(mfib_entry_index);
current_best = mfib_entry_get_best_source(mfib_entry);
msrc = mfib_entry_src_update_and_lock(mfib_entry, source, rpf_id,
entry_flags);
mfib_entry_update_i(mfib_entry, msrc, current_best, repi);
return (mfib_entry_ok_for_delete(mfib_entry));
}
int
mfib_entry_update (fib_node_index_t mfib_entry_index,
mfib_source_t source,
mfib_entry_flags_t entry_flags,
fib_rpf_id_t rpf_id,
index_t repi)
{
mfib_source_t current_best;
mfib_entry_t *mfib_entry;
mfib_entry_src_t *msrc;
mfib_entry = mfib_entry_get(mfib_entry_index);
current_best = mfib_entry_get_best_source(mfib_entry);
msrc = mfib_entry_src_update(mfib_entry, source, rpf_id, entry_flags);
mfib_entry_update_i(mfib_entry, msrc, current_best, repi);
return (mfib_entry_ok_for_delete(mfib_entry));
}
static void
mfib_entry_itf_add (mfib_entry_src_t *msrc,
u32 sw_if_index,
index_t mi)
{
hash_set(msrc->mfes_itfs, sw_if_index, mi);
}
static void
mfib_entry_itf_remove (mfib_entry_src_t *msrc,
u32 sw_if_index)
{
mfib_itf_t *mfi;
mfi = mfib_entry_itf_find(msrc->mfes_itfs, sw_if_index);
mfib_itf_delete(mfi);
hash_unset(msrc->mfes_itfs, sw_if_index);
}
void
mfib_entry_path_update (fib_node_index_t mfib_entry_index,
mfib_source_t source,
const fib_route_path_t *rpath,
mfib_itf_flags_t itf_flags)
{
fib_node_index_t path_index;
mfib_source_t current_best;
mfib_path_ext_t *path_ext;
mfib_entry_t *mfib_entry;
mfib_entry_src_t *msrc;
mfib_itf_flags_t old;
mfib_entry = mfib_entry_get(mfib_entry_index);
ASSERT(NULL != mfib_entry);
current_best = mfib_entry_get_best_source(mfib_entry);
msrc = mfib_entry_src_find_or_create(mfib_entry, source);
/*
* add the path to the path-list. If it's a duplicate we'll get
* back the original path.
*/
path_index = mfib_entry_src_path_add(msrc, rpath);
/*
* find the path extension for that path
*/
path_ext = mfib_entry_path_ext_find(msrc->mfes_exts, path_index);
if (NULL == path_ext)
{
old = MFIB_ITF_FLAG_NONE;
path_ext = mfib_path_ext_add(msrc, path_index, itf_flags);
}
else
{
old = path_ext->mfpe_flags;
path_ext->mfpe_flags = itf_flags;
}
/*
* Has the path changed its contribution to the input interface set.
* Which only paths with interfaces can do...
*/
if (~0 != rpath[0].frp_sw_if_index)
{
mfib_itf_t *mfib_itf;
if (old != itf_flags)
{
/*
* change of flag contributions
*/
mfib_itf = mfib_entry_itf_find(msrc->mfes_itfs,
rpath[0].frp_sw_if_index);
if (NULL == mfib_itf)
{
mfib_entry_itf_add(msrc,
rpath[0].frp_sw_if_index,
mfib_itf_create(path_index, itf_flags));
}
else
{
if (mfib_itf_update(mfib_itf,
path_index,
itf_flags))
{
/*
* no more interface flags on this path, remove
* from the data-plane set
*/
mfib_entry_itf_remove(msrc, rpath[0].frp_sw_if_index);
}
}
}
}
mfib_entry_recalculate_forwarding(mfib_entry, current_best);
}
/*
* mfib_entry_path_remove
*
* remove a path from the entry.
* return the mfib_entry's index if it is still present, INVALID otherwise.
*/
int
mfib_entry_path_remove (fib_node_index_t mfib_entry_index,
mfib_source_t source,
const fib_route_path_t *rpath)
{
fib_node_index_t path_index;
mfib_source_t current_best;
mfib_entry_t *mfib_entry;
mfib_entry_src_t *msrc;
mfib_entry = mfib_entry_get(mfib_entry_index);
ASSERT(NULL != mfib_entry);
current_best = mfib_entry_get_best_source(mfib_entry);
msrc = mfib_entry_src_find(mfib_entry, source, NULL);
if (NULL == msrc)
{
/*
* there are no paths left for this source
*/
return (mfib_entry_ok_for_delete(mfib_entry));
}
/*
* remove the path from the path-list. If it's not there we'll get
* back invalid
*/
path_index = mfib_entry_src_path_remove(msrc, rpath);
if (FIB_NODE_INDEX_INVALID != path_index)
{
/*
* don't need the extension, nor the interface anymore
*/
mfib_path_ext_remove(msrc, path_index);
if (~0 != rpath[0].frp_sw_if_index)
{
mfib_itf_t *mfib_itf;
mfib_itf = mfib_entry_itf_find(msrc->mfes_itfs,
rpath[0].frp_sw_if_index);
if (mfib_itf_update(mfib_itf,
path_index,
MFIB_ITF_FLAG_NONE))
{
/*
* no more interface flags on this path, remove
* from the data-plane set
*/
mfib_entry_itf_remove(msrc, rpath[0].frp_sw_if_index);
}
}
}
if (mfib_entry_src_ok_for_delete(msrc))
{
/*
* this source has no interfaces and no flags.
* it has nothing left to give - remove it
*/
mfib_entry_src_remove(mfib_entry, source);
}
mfib_entry_recalculate_forwarding(mfib_entry, current_best);
return (mfib_entry_ok_for_delete(mfib_entry));
}
/**
* mfib_entry_delete
*
* The source is withdrawing all the paths it provided
*/
int
mfib_entry_delete (fib_node_index_t mfib_entry_index,
mfib_source_t source)
{
mfib_source_t current_best;
mfib_entry_t *mfib_entry;
mfib_entry = mfib_entry_get(mfib_entry_index);
current_best = mfib_entry_get_best_source(mfib_entry);
mfib_entry_src_remove(mfib_entry, source);
mfib_entry_recalculate_forwarding(mfib_entry, current_best);
return (mfib_entry_ok_for_delete(mfib_entry));
}
static int
fib_ip4_address_compare (ip4_address_t * a1,
ip4_address_t * a2)
{
/*
* IP addresses are unsiged ints. the return value here needs to be signed
* a simple subtraction won't cut it.
* If the addresses are the same, the sort order is undefiend, so phoey.
*/
return ((clib_net_to_host_u32(a1->data_u32) >
clib_net_to_host_u32(a2->data_u32) ) ?
1 : -1);
}
static int
fib_ip6_address_compare (ip6_address_t * a1,
ip6_address_t * a2)
{
int i;
for (i = 0; i < ARRAY_LEN (a1->as_u16); i++)
{
int cmp = (clib_net_to_host_u16 (a1->as_u16[i]) -
clib_net_to_host_u16 (a2->as_u16[i]));
if (cmp != 0)
return cmp;
}
return 0;
}
static int
mfib_entry_cmp (fib_node_index_t mfib_entry_index1,
fib_node_index_t mfib_entry_index2)
{
mfib_entry_t *mfib_entry1, *mfib_entry2;
int cmp = 0;
mfib_entry1 = mfib_entry_get(mfib_entry_index1);
mfib_entry2 = mfib_entry_get(mfib_entry_index2);
switch (mfib_entry1->mfe_prefix.fp_proto)
{
case FIB_PROTOCOL_IP4:
cmp = fib_ip4_address_compare(&mfib_entry1->mfe_prefix.fp_grp_addr.ip4,
&mfib_entry2->mfe_prefix.fp_grp_addr.ip4);
if (0 == cmp)
{
cmp = fib_ip4_address_compare(&mfib_entry1->mfe_prefix.fp_src_addr.ip4,
&mfib_entry2->mfe_prefix.fp_src_addr.ip4);
}
break;
case FIB_PROTOCOL_IP6:
cmp = fib_ip6_address_compare(&mfib_entry1->mfe_prefix.fp_grp_addr.ip6,
&mfib_entry2->mfe_prefix.fp_grp_addr.ip6);
if (0 == cmp)
{
cmp = fib_ip6_address_compare(&mfib_entry1->mfe_prefix.fp_src_addr.ip6,
&mfib_entry2->mfe_prefix.fp_src_addr.ip6);
}
break;
case FIB_PROTOCOL_MPLS:
ASSERT(0);
cmp = 0;
break;
}
if (0 == cmp) {
cmp = (mfib_entry1->mfe_prefix.fp_len - mfib_entry2->mfe_prefix.fp_len);
}
return (cmp);
}
int
mfib_entry_cmp_for_sort (void *i1, void *i2)
{
fib_node_index_t *mfib_entry_index1 = i1, *mfib_entry_index2 = i2;
return (mfib_entry_cmp(*mfib_entry_index1,
*mfib_entry_index2));
}
static void
mfib_entry_last_lock_gone (fib_node_t *node)
{
mfib_entry_t *mfib_entry;
mfib_entry_src_t *msrc;
mfib_entry = mfib_entry_from_fib_node(node);
dpo_reset(&mfib_entry->mfe_rep);
MFIB_ENTRY_DBG(mfib_entry, "last-lock");
vec_foreach(msrc, mfib_entry->mfe_srcs)
{
mfib_entry_src_flush(msrc);
}
vec_free(mfib_entry->mfe_srcs);
fib_node_deinit(&mfib_entry->mfe_node);
pool_put(mfib_entry_pool, mfib_entry);
}
u32
mfib_entry_get_stats_index (fib_node_index_t fib_entry_index)
{
mfib_entry_t *mfib_entry;
mfib_entry = mfib_entry_get(fib_entry_index);
return (mfib_entry->mfe_rep.dpoi_index);
}
/*
* mfib_entry_back_walk_notify
*
* A back walk has reach this entry.
*/
static fib_node_back_walk_rc_t
mfib_entry_back_walk_notify (fib_node_t *node,
fib_node_back_walk_ctx_t *ctx)
{
mfib_entry_t *mfib_entry;
mfib_entry = mfib_entry_from_fib_node(node);
mfib_entry_recalculate_forwarding(mfib_entry,
mfib_entry_get_best_source(mfib_entry));
return (FIB_NODE_BACK_WALK_CONTINUE);
}
static void
mfib_entry_show_memory (void)
{
fib_show_memory_usage("multicast-Entry",
pool_elts(mfib_entry_pool),
pool_len(mfib_entry_pool),
sizeof(mfib_entry_t));
}
/*
* The MFIB entry's graph node virtual function table
*/
static const fib_node_vft_t mfib_entry_vft = {
.fnv_get = mfib_entry_get_node,
.fnv_last_lock = mfib_entry_last_lock_gone,
.fnv_back_walk = mfib_entry_back_walk_notify,
.fnv_mem_show = mfib_entry_show_memory,
};
void
mfib_entry_lock (fib_node_index_t mfib_entry_index)
{
mfib_entry_t *mfib_entry;
mfib_entry = mfib_entry_get(mfib_entry_index);
fib_node_lock(&mfib_entry->mfe_node);
}
void
mfib_entry_unlock (fib_node_index_t mfib_entry_index)
{
mfib_entry_t *mfib_entry;
mfib_entry = mfib_entry_get(mfib_entry_index);
fib_node_unlock(&mfib_entry->mfe_node);
}
static void
mfib_entry_dpo_lock (dpo_id_t *dpo)
{
}
static void
mfib_entry_dpo_unlock (dpo_id_t *dpo)
{
}
const static dpo_vft_t mfib_entry_dpo_vft = {
.dv_lock = mfib_entry_dpo_lock,
.dv_unlock = mfib_entry_dpo_unlock,
.dv_format = format_mfib_entry_dpo,
.dv_mem_show = mfib_entry_show_memory,
};
const static char* const mfib_entry_ip4_nodes[] =
{
"ip4-mfib-forward-rpf",
NULL,
};
const static char* const mfib_entry_ip6_nodes[] =
{
"ip6-mfib-forward-rpf",
NULL,
};
const static char* const * const mfib_entry_nodes[DPO_PROTO_NUM] =
{
[DPO_PROTO_IP4] = mfib_entry_ip4_nodes,
[DPO_PROTO_IP6] = mfib_entry_ip6_nodes,
};
void
mfib_entry_module_init (void)
{
fib_node_register_type (FIB_NODE_TYPE_MFIB_ENTRY, &mfib_entry_vft);
dpo_register(DPO_MFIB_ENTRY, &mfib_entry_dpo_vft, mfib_entry_nodes);
mfib_entry_logger = vlib_log_register_class("mfib", "entry");
}
void
mfib_entry_encode (fib_node_index_t mfib_entry_index,
fib_route_path_encode_t **api_rpaths)
{
fib_route_path_encode_t *api_rpath;
mfib_entry_t *mfib_entry;
mfib_entry_src_t *bsrc;
mfib_entry = mfib_entry_get(mfib_entry_index);
bsrc = mfib_entry_get_best_src(mfib_entry);
if (FIB_NODE_INDEX_INVALID != bsrc->mfes_pl)
{
fib_path_list_walk_w_ext(bsrc->mfes_pl,
NULL,
fib_path_encode,
api_rpaths);
}
vec_foreach(api_rpath, *api_rpaths)
{
mfib_itf_t *mfib_itf;
mfib_itf = mfib_entry_itf_find(bsrc->mfes_itfs,
api_rpath->rpath.frp_sw_if_index);
if (mfib_itf)
{
api_rpath->rpath.frp_mitf_flags = mfib_itf->mfi_flags;
}
}
}
const mfib_prefix_t *
mfib_entry_get_prefix (fib_node_index_t mfib_entry_index)
{
mfib_entry_t *mfib_entry;
mfib_entry = mfib_entry_get(mfib_entry_index);
return (&mfib_entry->mfe_prefix);
}
u32
mfib_entry_get_fib_index (fib_node_index_t mfib_entry_index)
{
mfib_entry_t *mfib_entry;
mfib_entry = mfib_entry_get(mfib_entry_index);
return (mfib_entry->mfe_fib_index);
}
const dpo_id_t*
mfib_entry_contribute_ip_forwarding (fib_node_index_t mfib_entry_index)
{
mfib_entry_t *mfib_entry;
mfib_entry = mfib_entry_get(mfib_entry_index);
return (&mfib_entry->mfe_rep);
}
void
mfib_entry_contribute_forwarding (fib_node_index_t mfib_entry_index,
fib_forward_chain_type_t type,
mfib_entry_fwd_flags_t flags,
dpo_id_t *dpo)
{
/*
* An IP mFIB entry can only provide a forwarding chain that
* is the same IP proto as the prefix.
* No use-cases (i know of) for other combinations.
*/
mfib_entry_t *mfib_entry;
dpo_proto_t dp;
mfib_entry = mfib_entry_get(mfib_entry_index);
dp = fib_proto_to_dpo(mfib_entry->mfe_prefix.fp_proto);
if (type == mfib_forw_chain_type_from_dpo_proto(dp))
{
replicate_t * rep;
rep = replicate_get(mfib_entry->mfe_rep.dpoi_index);
if ((rep->rep_flags & REPLICATE_FLAGS_HAS_LOCAL) &&
(flags & MFIB_ENTRY_FWD_FLAG_NO_LOCAL))
{
/*
* caller does not want the local paths that the entry has
*/
dpo_set(dpo, DPO_REPLICATE, rep->rep_proto,
replicate_dup(REPLICATE_FLAGS_NONE,
mfib_entry->mfe_rep.dpoi_index));
}
else
{
dpo_copy(dpo, &mfib_entry->mfe_rep);
}
}
else
{
dpo_copy(dpo, drop_dpo_get(dp));
}
}
/*
* fib_entry_cover_changed
*
* this entry is tracking its cover and that cover has changed.
*/
void
mfib_entry_cover_changed (fib_node_index_t mfib_entry_index)
{
mfib_entry_t *mfib_entry;
mfib_entry_src_t *msrc;
mfib_src_res_t res;
mfib_entry = mfib_entry_get(mfib_entry_index);
msrc = mfib_entry_get_best_src(mfib_entry);
res = mfib_entry_src_cover_change(mfib_entry, msrc);
if (MFIB_SRC_REEVALUATE == res)
{
mfib_entry_recalculate_forwarding(mfib_entry, msrc->mfes_src);
}
MFIB_ENTRY_DBG(mfib_entry, "cover-changed");
}
/*
* mfib_entry_cover_updated
*
* this entry is tracking its cover and that cover has been updated
* (i.e. its forwarding information has changed).
*/
void
mfib_entry_cover_updated (fib_node_index_t mfib_entry_index)
{
mfib_entry_t *mfib_entry;
mfib_entry_src_t *msrc;
mfib_src_res_t res;
mfib_entry = mfib_entry_get(mfib_entry_index);
msrc = mfib_entry_get_best_src(mfib_entry);
res = mfib_entry_src_cover_update(mfib_entry, msrc);
if (MFIB_SRC_REEVALUATE == res)
{
mfib_entry_recalculate_forwarding(mfib_entry, msrc->mfes_src);
}
MFIB_ENTRY_DBG(mfib_entry, "cover-updated");
}
u32
mfib_entry_pool_size (void)
{
return (pool_elts(mfib_entry_pool));
}
static clib_error_t *
show_mfib_entry_command (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
fib_node_index_t fei;
if (unformat (input, "%d", &fei))
{
/*
* show one in detail
*/
if (!pool_is_free_index(mfib_entry_pool, fei))
{
vlib_cli_output (vm, "%d@%U",
fei,
format_mfib_entry, fei,
MFIB_ENTRY_FORMAT_DETAIL2);
}
else
{
vlib_cli_output (vm, "entry %d invalid", fei);
}
}
else
{
/*
* show all
*/
vlib_cli_output (vm, "FIB Entries:");
pool_foreach_index(fei, mfib_entry_pool,
({
vlib_cli_output (vm, "%d@%U",
fei,
format_mfib_entry, fei,
MFIB_ENTRY_FORMAT_BRIEF);
}));
}
return (NULL);
}
/*?
* This commnad displays an entry, or all entries, in the mfib tables indexed by their unique
* numerical indentifier.
?*/
VLIB_CLI_COMMAND (show_mfib_entry, static) = {
.path = "show mfib entry",
.function = show_mfib_entry_command,
.short_help = "show mfib entry",
};
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