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zebra: NHG ID bounds macros

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Determine the NHG ID spacing and lower bound with ZEBRA_ROUTE_MAX
in macros.

Directly set the upperbound to be the lower 28bits of the uint32_t ID
space (the top 4 are reserved for l2-NHGs). Round that number down
a bit to make it more even.

Convert all former lower_bound calls to just use the macro.

Signed-off-by: Stephen Worley <sworley@cumulusnetworks.com>
This commit is contained in:
Stephen Worley 2020-05-13 14:32:13 -04:00
parent 16b20ad062
commit 54c89c9377
4 changed files with 18 additions and 19 deletions
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10
lib/zclient.c
View file

@ -4081,13 +4081,5 @@ uint32_t zclient_get_nhg_start(uint32_t proto)
{
assert(proto < ZEBRA_ROUTE_MAX);
return ZEBRA_NHG_SPACING * proto;
}
/*
* Where do routing protocols IDs start overall (first ID after zebra)
*/
uint32_t zclient_get_nhg_lower_bound()
{
return ZEBRA_NHG_SPACING * (ZEBRA_ROUTE_CONNECT + 1);
return ZEBRA_NHG_PROTO_SPACING * proto;
}

15
lib/zclient.h
View file

@ -686,13 +686,20 @@ struct zclient_options {
extern struct zclient_options zclient_options_default;
/*
* We reserve the top 4 bits for l2-NHG, everything else
* is for zebra/proto l3-NHG.
*
* Each client is going to get it's own nexthop group space
* and we'll separate them by 50 million, we'll figure out where
* to start based upon the route_types.h
* and we'll separate them, we'll figure out where to start based upon
* the route_types.h
*/
#define ZEBRA_NHG_SPACING 50000000
#define ZEBRA_NHG_PROTO_UPPER \
((uint32_t)250000000) /* Bottom 28 bits then rounded down */
#define ZEBRA_NHG_PROTO_SPACING (ZEBRA_NHG_PROTO_UPPER / ZEBRA_ROUTE_MAX)
#define ZEBRA_NHG_PROTO_LOWER \
(ZEBRA_NHG_PROTO_SPACING * (ZEBRA_ROUTE_CONNECT + 1))
extern uint32_t zclient_get_nhg_start(uint32_t proto);
extern uint32_t zclient_get_nhg_lower_bound(void);
extern struct zclient *zclient_new(struct thread_master *m,
struct zclient_options *opt);

2
zebra/rt_netlink.c
View file

@ -144,7 +144,7 @@ static bool is_proto_nhg(uint32_t id, int type)
return false;
}
if (id >= zclient_get_nhg_lower_bound())
if (id >= ZEBRA_NHG_PROTO_LOWER)
return true;
return false;

10
zebra/zebra_nhg.c
View file

@ -676,7 +676,7 @@ static bool zebra_nhe_find(struct nhg_hash_entry **nhe, /* return value */
if (lookup->id == 0)
lookup->id = ++id_counter;
if (lookup->id < zclient_get_nhg_lower_bound()) {
if (lookup->id < ZEBRA_NHG_PROTO_LOWER) {
/*
* This is a zebra hashed/owned NHG.
*
@ -730,7 +730,7 @@ static bool zebra_nhe_find(struct nhg_hash_entry **nhe, /* return value */
if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_ACTIVE))
SET_FLAG(newnhe->flags, NEXTHOP_GROUP_VALID);
if (nh->next == NULL && newnhe->id < zclient_get_nhg_lower_bound()) {
if (nh->next == NULL && newnhe->id < ZEBRA_NHG_PROTO_LOWER) {
if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_RECURSIVE)) {
/* Single recursive nexthop */
handle_recursive_depend(&newnhe->nhg_depends,
@ -1246,7 +1246,7 @@ int zebra_nhg_kernel_find(uint32_t id, struct nexthop *nh, struct nh_grp *grp,
zlog_debug("%s: nh %pNHv, id %u, count %d",
__func__, nh, id, (int)count);
if (id > id_counter && id < zclient_get_nhg_lower_bound())
if (id > id_counter && id < ZEBRA_NHG_PROTO_LOWER)
/* Increase our counter so we don't try to create
* an ID that already exists
*/
@ -2319,7 +2319,7 @@ int nexthop_active_update(struct route_node *rn, struct route_entry *re)
struct nhg_hash_entry *curr_nhe;
uint32_t curr_active = 0, backup_active = 0;
if (re->nhe->id >= zclient_get_nhg_lower_bound())
if (re->nhe->id >= ZEBRA_NHG_PROTO_LOWER)
return proto_nhg_nexthop_active_update(&re->nhe->nhg);
afi_t rt_afi = family2afi(rn->p.family);
@ -2525,7 +2525,7 @@ void zebra_nhg_install_kernel(struct nhg_hash_entry *nhe)
if (CHECK_FLAG(nhe->flags, NEXTHOP_GROUP_VALID)
&& (!CHECK_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED)
|| nhe->id >= zclient_get_nhg_lower_bound())
|| nhe->id >= ZEBRA_NHG_PROTO_LOWER)
&& !CHECK_FLAG(nhe->flags, NEXTHOP_GROUP_QUEUED)) {
/* Change its type to us since we are installing it */
if (!ZEBRA_NHG_CREATED(nhe))