diff options
Diffstat (limited to 'zebra/zebra_nhg.h')
| -rw-r--r-- | zebra/zebra_nhg.h | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/zebra/zebra_nhg.h b/zebra/zebra_nhg.h index dc3a47c020..0a9e97ab48 100644 --- a/zebra/zebra_nhg.h +++ b/zebra/zebra_nhg.h @@ -50,6 +50,9 @@ struct nhg_hash_entry { struct nexthop_group nhg; + /* If supported, a mapping of backup nexthops. */ + struct nhg_backup_info *backup_info; + /* If this is not a group, it * will be a single nexthop * and must have an interface @@ -72,6 +75,7 @@ struct nhg_hash_entry { * faster with ID's. */ struct nhg_connected_tree_head nhg_depends, nhg_dependents; + /* * Is this nexthop group valid, ie all nexthops are fully resolved. * What is fully resolved? It's a nexthop that is either self contained @@ -102,11 +106,25 @@ struct nhg_hash_entry { * from the kernel. Therefore, it is unhashable. */ #define NEXTHOP_GROUP_UNHASHABLE (1 << 4) + +/* + * Backup nexthop support - identify groups that are backups for + * another group. + */ +#define NEXTHOP_GROUP_BACKUP (1 << 5) + }; /* Was this one we created, either this session or previously? */ #define ZEBRA_NHG_CREATED(NHE) ((NHE->type) == ZEBRA_ROUTE_NHG) +/* + * Backup nexthops: this is a group object itself, so + * that the backup nexthops can use the same code as a normal object. + */ +struct nhg_backup_info { + struct nhg_hash_entry *nhe; +}; enum nhg_ctx_op_e { NHG_CTX_OP_NONE = 0, @@ -162,13 +180,26 @@ bool zebra_nhg_kernel_nexthops_enabled(void); /** * NHE abstracted tree functions. - * Use these where possible instead of the direct ones access ones. + * Use these where possible instead of direct access. */ struct nhg_hash_entry *zebra_nhg_alloc(void); void zebra_nhg_free(struct nhg_hash_entry *nhe); /* In order to clear a generic hash, we need a generic api, sigh. */ void zebra_nhg_hash_free(void *p); +/* Init an nhe, for use in a hash lookup for example. There's some fuzziness + * if the nhe represents only a single nexthop, so we try to capture that + * variant also. + */ +void zebra_nhe_init(struct nhg_hash_entry *nhe, afi_t afi, + const struct nexthop *nh); + +/* Allocate, free backup nexthop info objects */ +struct nhg_backup_info *zebra_nhg_backup_alloc(void); +void zebra_nhg_backup_free(struct nhg_backup_info **p); + +struct nexthop_group *zebra_nhg_get_backup_nhg(struct nhg_hash_entry *nhe); + extern struct nhg_hash_entry *zebra_nhg_resolve(struct nhg_hash_entry *nhe); extern unsigned int zebra_nhg_depends_count(const struct nhg_hash_entry *nhe); @@ -203,10 +234,14 @@ extern int zebra_nhg_kernel_find(uint32_t id, struct nexthop *nh, /* Del via kernel */ extern int zebra_nhg_kernel_del(uint32_t id, vrf_id_t vrf_id); -/* Find via route creation */ +/* Find an nhe based on a nexthop_group */ extern struct nhg_hash_entry * zebra_nhg_rib_find(uint32_t id, struct nexthop_group *nhg, afi_t rt_afi); +/* Find an nhe based on a route's nhe, used during route creation */ +struct nhg_hash_entry * +zebra_nhg_rib_find_nhe(struct nhg_hash_entry *rt_nhe, afi_t rt_afi); + /* Reference counter functions */ extern void zebra_nhg_decrement_ref(struct nhg_hash_entry *nhe); extern void zebra_nhg_increment_ref(struct nhg_hash_entry *nhe); |