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bgpd: move l3nhg functions in separate bgp_nhg.[ch] file
This rework separates l3nhg functionality from the nexthop tracking code, by introducing two bgp_nhg.[ch] files. The calling functions are renamed from bgp_l3nhg* to bgp_nhg*. Signed-off-by: Philippe Guibert <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| // SPDX-License-Identifier: GPL-2.0-or-later | ||
| /* BGP Nexthop Group Support | ||
| * Copyright (C) 2023 NVIDIA Corporation | ||
| * Copyright (C) 2023 6WIND | ||
| */ | ||
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| #include <zebra.h> | ||
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| #include <bgpd/bgpd.h> | ||
| #include <bgpd/bgp_debug.h> | ||
| #include <bgpd/bgp_nhg.h> | ||
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| /**************************************************************************** | ||
| * L3 NHGs are used for fast failover of nexthops in the dplane. These are | ||
| * the APIs for allocating L3 NHG ids. Management of the L3 NHG itself is | ||
| * left to the application using it. | ||
| * PS: Currently EVPN host routes is the only app using L3 NHG for fast | ||
| * failover of remote ES links. | ||
| ***************************************************************************/ | ||
| static bitfield_t bgp_nh_id_bitmap; | ||
| static uint32_t bgp_nhg_start; | ||
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| /* XXX - currently we do nothing on the callbacks */ | ||
| static void bgp_nhg_add_cb(const char *name) | ||
| { | ||
| } | ||
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| static void bgp_nhg_modify_cb(const struct nexthop_group_cmd *nhgc) | ||
| { | ||
| } | ||
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| static void bgp_nhg_add_nexthop_cb(const struct nexthop_group_cmd *nhgc, | ||
| const struct nexthop *nhop) | ||
| { | ||
| } | ||
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| static void bgp_nhg_del_nexthop_cb(const struct nexthop_group_cmd *nhgc, | ||
| const struct nexthop *nhop) | ||
| { | ||
| } | ||
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| static void bgp_nhg_del_cb(const char *name) | ||
| { | ||
| } | ||
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| static void bgp_nhg_zebra_init(void) | ||
| { | ||
| static bool bgp_nhg_zebra_inited; | ||
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| if (bgp_nhg_zebra_inited) | ||
| return; | ||
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| bgp_nhg_zebra_inited = true; | ||
| bgp_nhg_start = zclient_get_nhg_start(ZEBRA_ROUTE_BGP); | ||
| nexthop_group_init(bgp_nhg_add_cb, bgp_nhg_modify_cb, | ||
| bgp_nhg_add_nexthop_cb, bgp_nhg_del_nexthop_cb, | ||
| bgp_nhg_del_cb); | ||
| } | ||
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| void bgp_nhg_init(void) | ||
| { | ||
| uint32_t id_max; | ||
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| id_max = MIN(ZEBRA_NHG_PROTO_SPACING - 1, 16 * 1024); | ||
| bf_init(bgp_nh_id_bitmap, id_max); | ||
| bf_assign_zero_index(bgp_nh_id_bitmap); | ||
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| if (BGP_DEBUG(nht, NHT) || BGP_DEBUG(evpn_mh, EVPN_MH_ES)) | ||
| zlog_debug("bgp nhg range %u - %u", bgp_nhg_start + 1, | ||
| bgp_nhg_start + id_max); | ||
| } | ||
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| void bgp_nhg_finish(void) | ||
| { | ||
| bf_free(bgp_nh_id_bitmap); | ||
| } | ||
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| uint32_t bgp_nhg_id_alloc(void) | ||
| { | ||
| uint32_t nhg_id = 0; | ||
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| bgp_nhg_zebra_init(); | ||
| bf_assign_index(bgp_nh_id_bitmap, nhg_id); | ||
| if (nhg_id) | ||
| nhg_id += bgp_nhg_start; | ||
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| return nhg_id; | ||
| } | ||
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| void bgp_nhg_id_free(uint32_t nhg_id) | ||
| { | ||
| if (!nhg_id || (nhg_id <= bgp_nhg_start)) | ||
| return; | ||
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| nhg_id -= bgp_nhg_start; | ||
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| bf_release_index(bgp_nh_id_bitmap, nhg_id); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| // SPDX-License-Identifier: GPL-2.0-or-later | ||
| /* BGP Nexthop Group Support | ||
| * Copyright (C) 2023 NVIDIA Corporation | ||
| * Copyright (C) 2023 6WIND | ||
| */ | ||
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| #ifndef _BGP_NHG_H | ||
| #define _BGP_NHG_H | ||
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| #include "nexthop_group.h" | ||
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| /* APIs for setting up and allocating L3 nexthop group ids */ | ||
| extern uint32_t bgp_nhg_id_alloc(void); | ||
| extern void bgp_nhg_id_free(uint32_t nhg_id); | ||
| extern void bgp_nhg_init(void); | ||
| void bgp_nhg_finish(void); | ||
|
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| #endif /* _BGP_NHG_H */ |
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