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/*
* Copyright (c) 2018 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.
*/
#ifndef __MFIB_ENTRY_SRC_H__
#define __MFIB_ENTRY_SRC_H__
#include <vnet/mfib/mfib_entry.h>
/**
* MFIB extensions to each path
*/
typedef struct mfib_path_ext_t_
{
mfib_itf_flags_t mfpe_flags;
fib_node_index_t mfpe_path;
} mfib_path_ext_t;
/**
* Flags for the source data
*/
typedef enum mfib_entry_src_attribute_t_ {
/**
* Marker. Add new values after this one.
*/
MFIB_ENTRY_SRC_ATTRIBUTE_FIRST,
/**
* the source has been added to the entry
*/
MFIB_ENTRY_SRC_ATTRIBUTE_STALE = MFIB_ENTRY_SRC_ATTRIBUTE_FIRST,
/**
* Marker. add new entries before this one.
*/
MFIB_ENTRY_SRC_ATTRIBUTE_LAST = MFIB_ENTRY_SRC_ATTRIBUTE_STALE,
} mfib_entry_src_attribute_t;
#define MFIB_ENTRY_SRC_ATTRIBUTES { \
[MFIB_ENTRY_SRC_ATTRIBUTE_STALE] = "stale", \
}
#define FOR_EACH_MFIB_SRC_ATTRIBUTE(_item) \
for (_item = MFIB_ENTRY_SRC_ATTRIBUTE_FIRST; \
_item <= MFIB_ENTRY_SRC_ATTRIBUTE_LAST; \
_item++)
typedef enum mfib_entry_src_flag_t_ {
MFIB_ENTRY_SRC_FLAG_NONE = 0,
MFIB_ENTRY_SRC_FLAG_STALE = (1 << MFIB_ENTRY_SRC_ATTRIBUTE_STALE),
} __attribute__ ((packed)) mfib_entry_src_flags_t;
extern u8 * format_mfib_entry_src_flags(u8 *s, va_list *args);
/*
* Keep the size of the flags field to 2 bytes, so it
* can be placed next to the 2 bytes reference count
*/
STATIC_ASSERT (sizeof(mfib_entry_src_flags_t) <= 2,
"FIB entry flags field size too big");
/**
* The source of an MFIB entry
*/
typedef struct mfib_entry_src_t_
{
/**
* Which source this is
*/
mfib_source_t mfes_src;
/**
* Route flags
*/
mfib_entry_flags_t mfes_route_flags;
/**
* Source flags
*/
mfib_entry_src_flags_t mfes_flags;
/**
* The reference count on the entry. this is a u32
* since there is no path-list sharing in mfib, so the number
* os children could be high.
*/
u32 mfes_ref_count;
/**
* The path-list of forwarding interfaces
*/
fib_node_index_t mfes_pl;
/**
* RPF-ID
*/
fib_rpf_id_t mfes_rpf_id;
/**
* Hash table of path extensions
*/
uword *mfes_exts;
/**
* Covering entry (if needed)
*/
struct {
fib_node_index_t mfes_cover;
u32 mfes_sibling;
};
/**
* The hash table of all interfaces.
* This is forwarding time information derived from the paths
* and their extensions.
*/
mfib_itf_t *mfes_itfs;
} mfib_entry_src_t;
/**
* signals from the sources to the caller
*/
typedef enum mfib_src_res_t_
{
MFIB_SRC_OK,
MFIB_SRC_REEVALUATE,
} mfib_src_res_t;
/**
* A function provided by each source to be invoked when it is activated
*/
typedef void (*mfib_entry_src_activiate_t) (mfib_entry_t*, mfib_entry_src_t*);
/**
* A function provided by each source to be invoked when it is deactivated
*/
typedef void (*mfib_entry_src_deactiviate_t) (mfib_entry_t*, mfib_entry_src_t*);
/**
* A function provided by each source to be invoked when the cover changes
*/
typedef mfib_src_res_t (*mfib_entry_src_cover_change_t) (mfib_entry_t*, mfib_entry_src_t*);
/**
* A function provided by each source to be invoked when the cover is updated
*/
typedef mfib_src_res_t (*mfib_entry_src_cover_update_t) (mfib_entry_t*, mfib_entry_src_t*);
/**
* Virtual function table provided by each_source
*/
typedef struct mfib_entry_src_vft_t_
{
mfib_entry_src_activiate_t mev_activate;
mfib_entry_src_deactiviate_t mev_deactivate;
mfib_entry_src_cover_change_t mev_cover_change;
mfib_entry_src_cover_update_t mev_cover_update;
} mfib_entry_src_vft;
extern void mfib_entry_src_register(mfib_source_t, const mfib_entry_src_vft*);
extern void mfib_entry_src_deactivate(mfib_entry_t *mfib_entry,
mfib_entry_src_t *bsrc);
extern void mfib_entry_src_activate(mfib_entry_t *mfib_entry,
mfib_entry_src_t *bsrc);
extern mfib_src_res_t mfib_entry_src_cover_change(mfib_entry_t *mfib_entry,
mfib_entry_src_t *bsrc);
extern mfib_src_res_t mfib_entry_src_cover_update(mfib_entry_t *mfib_entry,
mfib_entry_src_t *bsrc);
extern mfib_entry_src_t* mfib_entry_get_best_src(const mfib_entry_t *mfib_entry);
extern void mfib_entry_src_module_init(void);
extern void mfib_entry_src_rr_module_init(void);
#endif
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