uint gc_period; /* Approximate time between two consecutive GC runs */
u32 debug; /* Debugging flags (D_*) */
byte sorted; /* Routes of network are sorted according to rte_better() */
- byte internal; /* Internal table of a protocol */
byte trie_used; /* Rtable has attached trie */
+ struct rt_cork_threshold cork_threshold; /* Cork threshold values */
+ struct settle_config export_settle; /* Export announcement settler */
+ struct settle_config export_rr_settle;/* Export announcement settler config valid when any
+ route refresh is running */
+ btime min_settle_time; /* Minimum settle time for notifications */
+ btime max_settle_time; /* Maximum settle time for notifications */
+ struct tbf_config log_tbf_cf; /* Config logging rate for rtable */
};
-typedef struct rtable {
- resource r;
- node n; /* Node in list of all tables */
+struct rt_export_hook;
+struct rt_export_request;
+struct rt_exporter;
+
+struct rt_exporter_class {
+ void (*start)(struct rt_exporter *, struct rt_export_request *);
+ void (*stop)(struct rt_export_hook *);
+ void (*done)(void *_rt_export_hook);
+};
+
+struct rt_exporter {
+ const struct rt_exporter_class *class;
+ pool *rp;
+ list hooks; /* Registered route export hooks */
+ uint addr_type; /* Type of address data exported (NET_*) */
+};
+
+struct rt_table_exporter {
+ struct rt_exporter e;
+ list pending; /* List of packed struct rt_pending_export */
+
+ struct rt_pending_export *first; /* First export to announce */
+ u64 next_seq; /* The next export will have this ID */
+};
+
+extern uint rtable_max_id;
+
+/* The public part of rtable structure */
+#define RTABLE_PUBLIC \
+ resource r; \
+ node n; /* Node in list of all tables */ \
+ char *name; /* Name of this table */ \
+ uint addr_type; /* Type of address data stored in table (NET_*) */ \
+ uint id; /* Integer table ID for fast lookup */ \
+ DOMAIN(rtable) lock; /* Lock to take to access the private parts */ \
+ struct rtable_config *config; /* Configuration of this table */ \
+ struct birdloop *loop; /* Service thread */ \
+ netindex_hash *netindex; /* Prefix index for this table */ \
+
+/* The complete rtable structure */
+struct rtable_private {
+ /* Once more the public part */
+ struct { RTABLE_PUBLIC; };
+ struct rtable_private **locked_at;
+
+ /* Here the private items not to be accessed without locking */
pool *rp; /* Resource pool to allocate everything from, including itself */
- struct fib fib;
+ struct slab *rte_slab; /* Slab to allocate route objects */
+ struct network *routes; /* Actual route objects in the table */
+ u32 routes_block_size; /* Size of the route object pointer block */
struct f_trie *trie; /* Trie of prefixes defined in fib */
- char *name; /* Name of this table */
- list channels; /* List of attached channels (struct channel) */
- uint addr_type; /* Type of address data stored in table (NET_*) */
- u32 debug; /* Debugging flags (D_*) */
- int pipe_busy; /* Pipe loop detection */
int use_count; /* Number of protocols using this table */
u32 rt_count; /* Number of routes in the table */
+ u32 net_count; /* Number of nets in the table */
+ u32 debug; /* Debugging flags (D_*) */
- byte internal; /* Internal table of a protocol */
+ list imports; /* Registered route importers */
+ struct rt_table_exporter exporter; /* Exporter API structure */
struct hmap id_map;
struct hostcache *hostcache;
struct f_trie *trie_old; /* Old prefix trie waiting to be freed */
u32 trie_lock_count; /* Prefix trie locked by walks */
u32 trie_old_lock_count; /* Old prefix trie locked by walks */
+ struct tbf rl_pipe; /* Rate limiting token buffer for pipe collisions */
- list subscribers; /* Subscribers for notifications */
- struct timer *settle_timer; /* Settle time for notifications */
- list flowspec_links; /* List of flowspec links, src for NET_IPx and dst for NET_FLOWx */
struct f_trie *flowspec_trie; /* Trie for evaluation of flowspec notifications */
// struct mpls_domain *mpls_domain; /* Label allocator for MPLS */
+ struct tbf log_tbf; /* Actual logging rate for rtable (might be changed in cmd) */
+};
+
+/* The final union private-public rtable structure */
+typedef union rtable {
+ struct {
+ RTABLE_PUBLIC;
+ };
+ struct rtable_private priv;
} rtable;
-struct rt_subscription {
- node n;
- rtable *tab;
- void (*hook)(struct rt_subscription *b);
- void *data;
+/* Define the lock cleanup function */
+LOBJ_UNLOCK_CLEANUP(rtable, rtable);
+
+#define RT_IS_LOCKED(tab) LOBJ_IS_LOCKED((tab), rtable)
+#define RT_LOCKED(tab, tp) LOBJ_LOCKED((tab), tp, rtable, rtable)
+
+#define RT_LOCK_SIMPLE(tab) LOBJ_LOCK_SIMPLE((tab), rtable)
+#define RT_UNLOCK_SIMPLE(tab) LOBJ_UNLOCK_SIMPLE((tab), rtable)
+
+#define RT_UNLOCKED_TEMPORARILY(tab, tp) LOBJ_UNLOCKED_TEMPORARILY((tab), tp, rtable, rtable)
+
+#define RT_PUB(tab) SKIP_BACK(rtable, priv, tab)
+
+/* Flags for birdloop_flag() */
+#define RTF_CLEANUP 1
+#define RTF_NHU 2
+#define RTF_EXPORT 4
+#define RTF_DELETE 8
+
+extern struct rt_cork {
+ _Atomic uint active;
+ event_list queue;
+ event run;
+} rt_cork;
+
+static inline void rt_cork_acquire(void)
+{
+ atomic_fetch_add_explicit(&rt_cork.active, 1, memory_order_acq_rel);
+}
+
+static inline void rt_cork_release(void)
+{
+ if (atomic_fetch_sub_explicit(&rt_cork.active, 1, memory_order_acq_rel) == 1)
+ {
+ synchronize_rcu();
+ ev_send(&global_work_list, &rt_cork.run);
+ }
+}
+
+static inline int rt_cork_check(event *e)
+{
+ rcu_read_lock();
+
+ int corked = (atomic_load_explicit(&rt_cork.active, memory_order_acquire) > 0);
+ if (corked)
+ ev_send(&rt_cork.queue, e);
+
+ rcu_read_unlock();
+
+ return corked;
+}
+
+
+typedef struct network {
+ struct rte_storage *routes; /* Available routes for this network */
+ struct rt_pending_export *first, *last;
+} net;
+
+struct rte_storage {
+ struct rte_storage *next; /* Next in chain */
+ union {
+ struct {
+ RTE_IN_TABLE_WRITABLE;
+ };
+ const struct rte rte; /* Route data */
+ };
};
-struct rt_flowspec_link {
+#define RTE_COPY(r) ((r) ? (r)->rte : (rte) {})
+#define RTE_COPY_VALID(r) (((r) && (rte_is_valid(&(r)->rte))) ? (r)->rte : (rte) {})
+#define RTE_OR_NULL(r) ((r) ? &((r)->rte) : NULL)
+#define RTE_VALID_OR_NULL(r) (((r) && (rte_is_valid(&(r)->rte))) ? &((r)->rte) : NULL)
+
+#define RTES_WRITE(r) (((r) != ((struct rte_storage *) 0)) ? ((struct rte *) &(r)->rte) : NULL)
+
+#define RTE_GET_NETINDEX(e) NET_TO_INDEX((e)->net)
+
+/* Table-channel connections */
+
+struct rt_prefilter {
+ union {
+ const struct f_trie *trie;
+ const net_addr *addr; /* Network prefilter address */
+ int (*hook)(const struct rt_prefilter *, const net_addr *);
+ };
+ /* Network prefilter mode (TE_ADDR_*) */
+ enum {
+ TE_ADDR_NONE = 0, /* No address matching */
+ TE_ADDR_EQUAL, /* Exact query - show route <addr> */
+ TE_ADDR_FOR, /* Longest prefix match - show route for <addr> */
+ TE_ADDR_IN, /* Interval query - show route in <addr> */
+ TE_ADDR_TRIE, /* Query defined by trie */
+ TE_ADDR_HOOK, /* Query processed by supplied custom hook */
+ } mode;
+} PACKED;
+
+struct rt_import_request {
+ struct rt_import_hook *hook; /* The table part of importer */
+ char *name;
+ u8 trace_routes;
+
+ event_list *list; /* Where to schedule announce events */
+
+ void (*dump_req)(struct rt_import_request *req);
+ void (*log_state_change)(struct rt_import_request *req, u8 state);
+ /* Preimport is called when the @new route is just-to-be inserted, replacing @old.
+ * Return a route (may be different or modified in-place) to continue or NULL to withdraw. */
+ int (*preimport)(struct rt_import_request *req, struct rte *new, const struct rte *old);
+};
+
+struct rt_import_hook {
node n;
- rtable *src;
- rtable *dst;
- u32 uc;
+ rtable *table; /* The connected table */
+ struct rt_import_request *req; /* The requestor */
+
+ struct rt_import_stats {
+ /* Import - from protocol to core */
+ u32 pref; /* Number of routes selected as best in the (adjacent) routing table */
+ u32 updates_ignored; /* Number of route updates rejected as already in route table */
+ u32 updates_accepted; /* Number of route updates accepted and imported */
+ u32 withdraws_ignored; /* Number of route withdraws rejected as already not in route table */
+ u32 withdraws_accepted; /* Number of route withdraws accepted and processed */
+ } stats;
+
+ u64 flush_seq; /* Table export seq when the channel announced flushing */
+ btime last_state_change; /* Time of last state transition */
+
+ u8 import_state; /* IS_* */
+ u8 stale_set; /* Set this stale_cycle to imported routes */
+ u8 stale_valid; /* Routes with this stale_cycle and bigger are considered valid */
+ u8 stale_pruned; /* Last prune finished when this value was set at stale_valid */
+ u8 stale_pruning; /* Last prune started when this value was set at stale_valid */
+
+ void (*stopped)(struct rt_import_request *); /* Stored callback when import is stopped */
+ event announce_event; /* This event announces table updates */
};
-#define NHU_CLEAN 0
-#define NHU_SCHEDULED 1
-#define NHU_RUNNING 2
-#define NHU_DIRTY 3
+struct rt_pending_export {
+ struct rt_pending_export * _Atomic next; /* Next export for the same destination */
+ struct rte_storage *new, *new_best, *old, *old_best;
+ u64 seq; /* Sequential ID (table-local) of the pending export */
+};
-typedef struct network {
- struct rte *routes; /* Available routes for this network */
- struct fib_node n; /* FIB flags reserved for kernel syncer */
-} net;
+struct rt_export_request {
+ struct rt_export_hook *hook; /* Table part of the export */
+ char *name;
+ u8 trace_routes;
+ uint feed_block_size; /* How many routes to feed at once */
+ struct rt_prefilter prefilter;
+
+ event_list *list; /* Where to schedule export events */
+ pool *pool; /* Pool to use for allocations */
+
+ /* There are two methods of export. You can either request feeding every single change
+ * or feeding the whole route feed. In case of regular export, &export_one is preferred.
+ * Anyway, when feeding, &export_bulk is preferred, falling back to &export_one.
+ * Thus, for RA_OPTIMAL, &export_one is only set,
+ * for RA_MERGED and RA_ACCEPTED, &export_bulk is only set
+ * and for RA_ANY, both are set to accomodate for feeding all routes but receiving single changes
+ */
+ void (*export_one)(struct rt_export_request *req, const net_addr *net, struct rt_pending_export *rpe);
+ void (*export_bulk)(struct rt_export_request *req, const net_addr *net,
+ struct rt_pending_export *rpe, struct rt_pending_export *last,
+ const rte **feed, uint count);
+
+ void (*mark_seen)(struct rt_export_request *req, struct rt_pending_export *rpe);
+
+ void (*dump_req)(struct rt_export_request *req);
+ void (*log_state_change)(struct rt_export_request *req, u8);
+};
-struct hostcache {
- slab *slab; /* Slab holding all hostentries */
- struct hostentry **hash_table; /* Hash table for hostentries */
- unsigned hash_order, hash_shift;
- unsigned hash_max, hash_min;
- unsigned hash_items;
- linpool *lp; /* Linpool for trie */
- struct f_trie *trie; /* Trie of prefixes that might affect hostentries */
- list hostentries; /* List of all hostentries */
- byte update_hostcache;
+static inline int rt_prefilter_net(const struct rt_prefilter *p, const net_addr *n)
+{
+ switch (p->mode)
+ {
+ case TE_ADDR_NONE: return 1;
+ case TE_ADDR_IN: return net_in_netX(n, p->addr);
+ case TE_ADDR_EQUAL: return net_equal(n, p->addr);
+ case TE_ADDR_FOR: return net_in_netX(p->addr, n);
+ case TE_ADDR_TRIE: return trie_match_net(p->trie, n);
+ case TE_ADDR_HOOK: return p->hook(p, n);
+ }
+
+ bug("Crazy prefilter application attempt failed wildly.");
+}
+
+struct rt_export_hook {
+ node n;
+ struct rt_exporter *table; /* The connected table */
+
+ pool *pool;
+
+ struct rt_export_request *req; /* The requestor */
+
+ struct rt_export_stats {
+ /* Export - from core to protocol */
+ u32 updates_received; /* Number of route updates received */
+ u32 withdraws_received; /* Number of route withdraws received */
+ } stats;
+
+ btime last_state_change; /* Time of last state transition */
+
+ _Atomic u8 export_state; /* Route export state (TES_*, see below) */
+ struct event event; /* Event running all the export operations */
+
+ struct bmap seq_map; /* Keep track which exports were already procesed */
+
+ void (*stopped)(struct rt_export_request *); /* Stored callback when export is stopped */
};
-struct hostentry {
- node ln;
- ip_addr addr; /* IP address of host, part of key */
- ip_addr link; /* (link-local) IP address of host, used as gw
- if host is directly attached */
- rtable *tab; /* Dependent table, part of key */
- rtable *owner; /* Nexthop owner table */
- struct hostentry *next; /* Next in hash chain */
- unsigned hash_key; /* Hash key */
- unsigned uc; /* Use count */
- struct rta *src; /* Source rta entry */
- byte dest; /* Chosen route destination type (RTD_...) */
- byte nexthop_linkable; /* Nexthop list is completely non-device */
- u32 igp_metric; /* Chosen route IGP metric */
+struct rt_table_export_hook {
+ union {
+ struct rt_export_hook h;
+ struct { /* Overriding the parent structure beginning */
+ node _n;
+ struct rt_table_exporter *table;
+ };
+ };
+
+ union {
+ u32 feed_index; /* Routing table iterator used during feeding */
+ struct {
+ struct f_trie_walk_state *walk_state; /* Iterator over networks in trie */
+ struct f_trie *walk_lock; /* Locked trie for walking */
+ union { /* Last net visited but not processed */
+ net_addr walk_last;
+ net_addr_ip4 walk_last_ip4;
+ net_addr_ip6 walk_last_ip6;
+ };
+ };
+ };
+
+ struct rt_pending_export *_Atomic last_export;/* Last export processed */
+ struct rt_pending_export *rpe_next; /* Next pending export to process */
+
+ u8 refeed_pending; /* Refeeding and another refeed is scheduled */
+ u8 feed_type; /* Which feeding method is used (TFT_*, see below) */
+
};
-typedef struct rte {
- struct rte *next;
- net *net; /* Network this RTE belongs to */
- struct rte_src *src; /* Route source that created the route */
- struct channel *sender; /* Channel used to send the route to the routing table */
- struct rta *attrs; /* Attributes of this route */
- u32 id; /* Table specific route id */
- byte flags; /* Flags (REF_...) */
- byte pflags; /* Protocol-specific flags */
- btime lastmod; /* Last modified */
-} rte;
+#define TIS_DOWN 0
+#define TIS_UP 1
+#define TIS_STOP 2
+#define TIS_FLUSHING 3
+#define TIS_WAITING 4
+#define TIS_CLEARED 5
+#define TIS_MAX 6
+
+#define TES_DOWN 0
+#define TES_HUNGRY 1
+#define TES_FEEDING 2
+#define TES_READY 3
+#define TES_STOP 4
+#define TES_MAX 5
+
+
+#define TFT_FIB 1
+#define TFT_TRIE 2
+#define TFT_HASH 3
+
+void rt_request_import(rtable *tab, struct rt_import_request *req);
+void rt_request_export(rtable *tab, struct rt_export_request *req);
+void rt_request_export_other(struct rt_exporter *tab, struct rt_export_request *req);
-#define REF_COW 1 /* Copy this rte on write */
-#define REF_FILTERED 2 /* Route is rejected by import filter */
-#define REF_STALE 4 /* Route is stale in a refresh cycle */
-#define REF_DISCARD 8 /* Route is scheduled for discard */
-#define REF_MODIFY 16 /* Route is scheduled for modify */
+void rt_stop_import(struct rt_import_request *, void (*stopped)(struct rt_import_request *));
+void rt_stop_export(struct rt_export_request *, void (*stopped)(struct rt_export_request *));
-/* Route is valid for propagation (may depend on other flags in the future), accepts NULL */
-static inline int rte_is_valid(rte *r) { return r && !(r->flags & REF_FILTERED); }
+const char *rt_import_state_name(u8 state);
+const char *rt_export_state_name(u8 state);
-/* Route just has REF_FILTERED flag */
-static inline int rte_is_filtered(rte *r) { return !!(r->flags & REF_FILTERED); }
+static inline u8 rt_import_get_state(struct rt_import_hook *ih) { return ih ? ih->import_state : TIS_DOWN; }
+static inline u8 rt_export_get_state(struct rt_export_hook *eh) { return eh ? eh->export_state : TES_DOWN; }
+u8 rt_set_export_state(struct rt_export_hook *hook, u32 expected_mask, u8 state);
+
+void rte_import(struct rt_import_request *req, const net_addr *net, rte *new, struct rte_src *src);
+
+/*
+ * For table export processing
+ */
+
+/* Get next rpe. If src is given, it must match. */
+struct rt_pending_export *rpe_next(struct rt_pending_export *rpe, struct rte_src *src);
+
+/* Walk all rpe's */
+#define RPE_WALK(first, it, src) \
+ for (struct rt_pending_export *it = (first); it; it = rpe_next(it, (src)))
+
+/* Mark the pending export processed */
+void rpe_mark_seen(struct rt_export_hook *hook, struct rt_pending_export *rpe);
+
+#define rpe_mark_seen_all(hook, first, last, src) do { \
+ RPE_WALK((first), _rpe, (src)) { \
+ rpe_mark_seen((hook), _rpe); \
+ if (_rpe == last) break; \
+ }} while (0)
+
+/* Get pending export seen status */
+int rpe_get_seen(struct rt_export_hook *hook, struct rt_pending_export *rpe);
+
+/*
+ * For rt_export_hook and rt_exporter inheritance
+ */
+
+void rt_init_export(struct rt_exporter *re, struct rt_export_hook *hook);
+struct rt_export_hook *rt_alloc_export(struct rt_exporter *re, pool *pool, uint size);
+void rt_stop_export_common(struct rt_export_hook *hook);
+void rt_export_stopped(struct rt_export_hook *hook);
+void rt_exporter_init(struct rt_exporter *re);
+
+/*
+ * Channel export hooks. To be refactored out.
+ */
+
+int channel_preimport(struct rt_import_request *req, rte *new, const rte *old);
+
+void channel_reload_export_bulk(struct rt_export_request *req, const net_addr *net, struct rt_pending_export *first, struct rt_pending_export *last, const rte **feed, uint count);
+
+void rt_notify_optimal(struct rt_export_request *req, const net_addr *net, struct rt_pending_export *rpe);
+void rt_notify_any(struct rt_export_request *req, const net_addr *net, struct rt_pending_export *rpe);
+void rt_feed_any(struct rt_export_request *req, const net_addr *net, struct rt_pending_export *first, struct rt_pending_export *last, const rte **feed, uint count);
+void rt_notify_accepted(struct rt_export_request *req, const net_addr *net, struct rt_pending_export *first, struct rt_pending_export *last, const rte **feed, uint count);
+void rt_notify_merged(struct rt_export_request *req, const net_addr *net, struct rt_pending_export *first, struct rt_pending_export *last, const rte **feed, uint count);
+
+void channel_rpe_mark_seen(struct channel *c, struct rt_pending_export *rpe);
/* Types of route announcement, also used as flags */
#define RA_UNDEF 0 /* Undefined RA type */
#define RSEM_NOEXPORT 3 /* Routes rejected by export filter */
#define RSEM_EXPORTED 4 /* Routes marked in export map */
-/*
- * Route Attributes
- *
- * Beware: All standard BGP attributes must be represented here instead
- * of making them local to the route. This is needed to ensure proper
- * construction of BGP route attribute lists.
- */
-
-/* Nexthop structure */
-struct nexthop {
- ip_addr gw; /* Next hop */
- struct iface *iface; /* Outgoing interface */
- struct nexthop *next;
- byte flags;
- byte weight;
- byte labels_orig; /* Number of labels before hostentry was applied */
- byte labels; /* Number of all labels */
- u32 label[0];
-};
-
-#define RNF_ONLINK 0x1 /* Gateway is onlink regardless of IP ranges */
-
-
-struct rte_src {
- struct rte_src *next; /* Hash chain */
- struct proto *proto; /* Protocol the source is based on */
- u64 private_id; /* Private ID, assigned by the protocol */
- u32 global_id; /* Globally unique ID of the source */
- unsigned uc; /* Use count */
-};
-
-
-typedef struct rta {
- struct rta *next, **pprev; /* Hash chain */
- u32 uc; /* Use count */
- u32 hash_key; /* Hash over important fields */
- struct ea_list *eattrs; /* Extended Attribute chain */
- struct hostentry *hostentry; /* Hostentry for recursive next-hops */
- ip_addr from; /* Advertising router */
- u32 igp_metric; /* IGP metric to next hop (for iBGP routes) */
- u16 cached:1; /* Are attributes cached? */
- u16 source:7; /* Route source (RTS_...) */
- u16 scope:4; /* Route scope (SCOPE_... -- see ip.h) */
- u16 dest:4; /* Route destination type (RTD_...) */
- word pref;
- struct nexthop nh; /* Next hop */
-} rta;
-
-#define RTS_STATIC 1 /* Normal static route */
-#define RTS_INHERIT 2 /* Route inherited from kernel */
-#define RTS_DEVICE 3 /* Device route */
-#define RTS_STATIC_DEVICE 4 /* Static device route */
-#define RTS_REDIRECT 5 /* Learned via redirect */
-#define RTS_RIP 6 /* RIP route */
-#define RTS_OSPF 7 /* OSPF route */
-#define RTS_OSPF_IA 8 /* OSPF inter-area route */
-#define RTS_OSPF_EXT1 9 /* OSPF external route type 1 */
-#define RTS_OSPF_EXT2 10 /* OSPF external route type 2 */
-#define RTS_BGP 11 /* BGP route */
-#define RTS_PIPE 12 /* Inter-table wormhole */
-#define RTS_BABEL 13 /* Babel route */
-#define RTS_RPKI 14 /* Route Origin Authorization */
-#define RTS_PERF 15 /* Perf checker */
-#define RTS_L3VPN 16 /* MPLS L3VPN */
-#define RTS_AGGREGATED 17 /* Aggregated route */
-#define RTS_MAX 18
-
-#define RTD_NONE 0 /* Undefined next hop */
-#define RTD_UNICAST 1 /* Next hop is neighbor router */
-#define RTD_BLACKHOLE 2 /* Silently drop packets */
-#define RTD_UNREACHABLE 3 /* Reject as unreachable */
-#define RTD_PROHIBIT 4 /* Administratively prohibited */
-#define RTD_MAX 5
-
-#define IGP_METRIC_UNKNOWN 0x80000000 /* Default igp_metric used when no other
- protocol-specific metric is availabe */
-
-
-extern const char * rta_dest_names[RTD_MAX];
-
-static inline const char *rta_dest_name(uint n)
-{ return (n < RTD_MAX) ? rta_dest_names[n] : "???"; }
-
-/* Route has regular, reachable nexthop (i.e. not RTD_UNREACHABLE and like) */
-static inline int rte_is_reachable(rte *r)
-{ return r->attrs->dest == RTD_UNICAST; }
-
-
-/*
- * Extended Route Attributes
- */
-
-typedef struct eattr {
- word id; /* EA_CODE(PROTOCOL_..., protocol-dependent ID) */
- byte flags; /* Protocol-dependent flags */
- byte type:5; /* Attribute type */
- byte originated:1; /* The attribute has originated locally */
- byte fresh:1; /* An uncached attribute (e.g. modified in export filter) */
- byte undef:1; /* Explicitly undefined */
- union {
- uintptr_t data;
- const struct adata *ptr; /* Attribute data elsewhere */
- } u;
-} eattr;
-
-
-#define EA_CODE(proto,id) (((proto) << 8) | (id))
-#define EA_ID(ea) ((ea) & 0xff)
-#define EA_PROTO(ea) ((ea) >> 8)
-#define EA_CUSTOM(id) ((id) | EA_CUSTOM_BIT)
-#define EA_IS_CUSTOM(ea) ((ea) & EA_CUSTOM_BIT)
-#define EA_CUSTOM_ID(ea) ((ea) & ~EA_CUSTOM_BIT)
-
-const char *ea_custom_name(uint ea);
-
-#define EA_GEN_IGP_METRIC EA_CODE(PROTOCOL_NONE, 0)
-#define EA_MPLS_LABEL EA_CODE(PROTOCOL_NONE, 1)
-#define EA_MPLS_POLICY EA_CODE(PROTOCOL_NONE, 2)
-#define EA_MPLS_CLASS EA_CODE(PROTOCOL_NONE, 3)
-
-#define EA_CODE_MASK 0xffff
-#define EA_CUSTOM_BIT 0x8000
-#define EA_ALLOW_UNDEF 0x10000 /* ea_find: allow EAF_TYPE_UNDEF */
-#define EA_BIT(n) ((n) << 24) /* Used in bitfield accessors */
-#define EA_BIT_GET(ea) ((ea) >> 24)
-#define EA_DATA_ALIGN 4 /* Alignment of adata in attribute cache */
-
-#define EAF_TYPE_MASK 0x1f /* Mask with this to get type */
-#define EAF_TYPE_INT 0x01 /* 32-bit unsigned integer number */
-#define EAF_TYPE_OPAQUE 0x02 /* Opaque byte string (not filterable) */
-#define EAF_TYPE_IP_ADDRESS 0x04 /* IP address */
-#define EAF_TYPE_ROUTER_ID 0x05 /* Router ID (IPv4 address) */
-#define EAF_TYPE_AS_PATH 0x06 /* BGP AS path (encoding per RFC 1771:4.3) */
-#define EAF_TYPE_BITFIELD 0x09 /* 32-bit embedded bitfield */
-#define EAF_TYPE_INT_SET 0x0a /* Set of u32's (e.g., a community list) */
-#define EAF_TYPE_EC_SET 0x0e /* Set of pairs of u32's - ext. community list */
-#define EAF_TYPE_LC_SET 0x12 /* Set of triplets of u32's - large community list */
-#define EAF_TYPE_IFACE 0x14 /* Interface pointer stored in adata */
-#define EAF_TYPE_STRING 0x16 /* Text string */
-#define EAF_EMBEDDED 0x01 /* Data stored in eattr.u.data (part of type spec) */
-#define EAF_VAR_LENGTH 0x02 /* Attribute length is variable (part of type spec) */
-
-typedef struct adata {
- uint length; /* Length of data */
- byte data[0];
-} adata;
-
-extern const adata null_adata; /* adata of length 0 */
-
-static inline struct adata *
-lp_alloc_adata(struct linpool *pool, uint len)
-{
- struct adata *ad = lp_alloc(pool, sizeof(struct adata) + len);
- ad->length = len;
- return ad;
-}
-
-static inline int adata_same(const struct adata *a, const struct adata *b)
-{ return (a->length == b->length && !memcmp(a->data, b->data, a->length)); }
-
-
-typedef struct ea_list {
- struct ea_list *next; /* In case we have an override list */
- byte flags; /* Flags: EALF_... */
- byte rfu;
- word count; /* Number of attributes */
- eattr attrs[0]; /* Attribute definitions themselves */
-} ea_list;
-
-#define EALF_SORTED 1 /* Attributes are sorted by code */
-#define EALF_BISECT 2 /* Use interval bisection for searching */
-#define EALF_CACHED 4 /* Attributes belonging to cached rta */
-
-struct rte_src *rt_find_source(struct proto *p, u32 id);
-struct rte_src *rt_get_source(struct proto *p, u32 id);
-static inline void rt_lock_source(struct rte_src *src) { src->uc++; }
-static inline void rt_unlock_source(struct rte_src *src) { src->uc--; }
-void rt_prune_sources(void);
-
-struct ea_walk_state {
- ea_list *eattrs; /* Ccurrent ea_list, initially set by caller */
- eattr *ea; /* Current eattr, initially NULL */
- u32 visited[4]; /* Bitfield, limiting max to 128 */
-};
-
-eattr *ea_find(ea_list *, unsigned ea);
-eattr *ea_walk(struct ea_walk_state *s, uint id, uint max);
-uintptr_t ea_get_int(ea_list *, unsigned ea, uintptr_t def);
-void ea_dump(ea_list *);
-void ea_sort(ea_list *); /* Sort entries in all sub-lists */
-unsigned ea_scan(ea_list *); /* How many bytes do we need for merged ea_list */
-void ea_merge(ea_list *from, ea_list *to); /* Merge sub-lists to allocated buffer */
-int ea_same(ea_list *x, ea_list *y); /* Test whether two ea_lists are identical */
-uint ea_hash(ea_list *e); /* Calculate 16-bit hash value */
-ea_list *ea_append(ea_list *to, ea_list *what);
-void ea_format_bitfield(const struct eattr *a, byte *buf, int bufsize, const char **names, int min, int max);
-
-#define ea_normalize(ea) do { \
- if (ea->next) { \
- ea_list *t = alloca(ea_scan(ea)); \
- ea_merge(ea, t); \
- ea = t; \
- } \
- ea_sort(ea); \
- if (ea->count == 0) \
- ea = NULL; \
-} while(0) \
-
-struct ea_one_attr_list {
- ea_list l;
- eattr a;
+/* Host entry: Resolve hook for recursive nexthops */
+extern struct ea_class ea_gen_hostentry;
+struct hostentry_adata {
+ adata ad;
+ struct hostentry *he;
+ u32 labels[0];
};
-static inline eattr *
-ea_set_attr(ea_list **to, struct linpool *pool, uint id, uint flags, uint type, uintptr_t val)
-{
- struct ea_one_attr_list *ea = lp_alloc(pool, sizeof(*ea));
- *ea = (struct ea_one_attr_list) {
- .l.flags = EALF_SORTED,
- .l.count = 1,
- .l.next = *to,
-
- .a.id = id,
- .a.type = type,
- .a.flags = flags,
- };
+#define HOSTENTRY_LABEL_COUNT(head) (head->ad.length + sizeof(struct adata) - sizeof(struct hostentry_adata)) / sizeof(u32)
- if (type & EAF_EMBEDDED)
- ea->a.u.data = val;
- else
- ea->a.u.ptr = (struct adata *) val;
+void
+ea_set_hostentry(ea_list **to, rtable *dep, rtable *tab, ip_addr gw, ip_addr ll, u32 lnum, u32 labels[lnum]);
- *to = &ea->l;
-
- return &ea->a;
-}
-
-static inline void
-ea_unset_attr(ea_list **to, struct linpool *pool, _Bool local, uint code)
-{
- struct ea_one_attr_list *ea = lp_alloc(pool, sizeof(*ea));
- *ea = (struct ea_one_attr_list) {
- .l.flags = EALF_SORTED,
- .l.count = 1,
- .l.next = *to,
- .a.id = code,
- .a.fresh = local,
- .a.originated = local,
- .a.undef = 1,
- };
-
- *to = &ea->l;
-}
-
-static inline void
-ea_set_attr_u32(ea_list **to, struct linpool *pool, uint id, uint flags, uint type, u32 val)
-{ ea_set_attr(to, pool, id, flags, type, (uintptr_t) val); }
-
-static inline void
-ea_set_attr_ptr(ea_list **to, struct linpool *pool, uint id, uint flags, uint type, struct adata *val)
-{ ea_set_attr(to, pool, id, flags, type, (uintptr_t) val); }
-
-static inline void
-ea_set_attr_data(ea_list **to, struct linpool *pool, uint id, uint flags, uint type, void *data, uint len)
-{
- struct adata *a = lp_alloc_adata(pool, len);
- memcpy(a->data, data, len);
- ea_set_attr(to, pool, id, flags, type, (uintptr_t) a);
-}
-
-
-#define NEXTHOP_MAX_SIZE (sizeof(struct nexthop) + sizeof(u32)*MPLS_MAX_LABEL_STACK)
-
-static inline size_t nexthop_size(const struct nexthop *nh)
-{ return sizeof(struct nexthop) + sizeof(u32)*nh->labels; }
-int nexthop__same(struct nexthop *x, struct nexthop *y); /* Compare multipath nexthops */
-static inline int nexthop_same(struct nexthop *x, struct nexthop *y)
-{ return (x == y) || nexthop__same(x, y); }
-int nexthop_equal_(struct nexthop *x, struct nexthop *y); /* Compare multipath nexthops, ignore labels_orig */
-static inline int nexthop_equal(struct nexthop *x, struct nexthop *y)
-{ return (x == y) || nexthop_equal_(x, y); }
-struct nexthop *nexthop_merge(struct nexthop *x, struct nexthop *y, int rx, int ry, int max, linpool *lp);
-struct nexthop *nexthop_sort(struct nexthop *x);
-static inline void nexthop_link(struct rta *a, const struct nexthop *from)
-{ memcpy(&a->nh, from, nexthop_size(from)); }
-void nexthop_insert(struct nexthop **n, struct nexthop *y);
-int nexthop_is_sorted(struct nexthop *x);
-
-void rta_init(void);
-static inline size_t rta_size(const rta *a) { return sizeof(rta) + sizeof(u32)*a->nh.labels; }
-#define RTA_MAX_SIZE (sizeof(rta) + sizeof(u32)*MPLS_MAX_LABEL_STACK)
-rta *rta_lookup(rta *); /* Get rta equivalent to this one, uc++ */
-static inline int rta_is_cached(rta *r) { return r->cached; }
-static inline rta *rta_clone(rta *r) { r->uc++; return r; }
-void rta__free(rta *r);
-static inline void rta_free(rta *r) { if (r && !--r->uc) rta__free(r); }
-rta *rta_do_cow(rta *o, linpool *lp);
-static inline rta * rta_cow(rta *r, linpool *lp) { return rta_is_cached(r) ? rta_do_cow(r, lp) : r; }
-void rta_dump(rta *);
-void rta_dump_all(void);
-void rta_show(struct cli *, rta *);
+void ea_show_hostentry(const struct adata *ad, byte *buf, uint size);
+void ea_show_nexthop_list(struct cli *c, struct nexthop_adata *nhad);
-u32 rt_get_igp_metric(rte *rt);
-struct hostentry * rt_get_hostentry(rtable *tab, ip_addr a, ip_addr ll, rtable *dep);
-void rta_apply_hostentry(rta *a, struct hostentry *he, mpls_label_stack *mls);
-
-static inline void
-rta_set_recursive_next_hop(rtable *dep, rta *a, rtable *tab, ip_addr gw, ip_addr ll, mpls_label_stack *mls)
-{
- rta_apply_hostentry(a, rt_get_hostentry(tab, gw, ll, dep), mls);
-}
-
-/*
- * rta_set_recursive_next_hop() acquires hostentry from hostcache and fills
- * rta->hostentry field. New hostentry has zero use count. Cached rta locks its
- * hostentry (increases its use count), uncached rta does not lock it. Hostentry
- * with zero use count is removed asynchronously during host cache update,
- * therefore it is safe to hold such hostentry temorarily. Hostentry holds a
- * lock for a 'source' rta, mainly to share multipath nexthops.
- *
- * There is no need to hold a lock for hostentry->dep table, because that table
- * contains routes responsible for that hostentry, and therefore is non-empty if
- * given hostentry has non-zero use count. If the hostentry has zero use count,
- * the entry is removed before dep is referenced.
- *
- * The protocol responsible for routes with recursive next hops should hold a
- * lock for a 'source' table governing that routes (argument tab to
- * rta_set_recursive_next_hop()), because its routes reference hostentries
- * (through rta) related to the governing table. When all such routes are
- * removed, rtas are immediately removed achieving zero uc. Then the 'source'
- * table lock could be immediately released, although hostentries may still
- * exist - they will be freed together with the 'source' table.
- */
-
-static inline void rt_lock_hostentry(struct hostentry *he) { if (he) he->uc++; }
-static inline void rt_unlock_hostentry(struct hostentry *he) { if (he) he->uc--; }
-
-int rt_flowspec_check(rtable *tab_ip, rtable *tab_flow, const net_addr *n, rta *a, int interior);
-
-
+ void table_logging_cmd(struct table_spec ts, struct tbf_config *rate);
+
/*
* Default protocol preferences
*/
projects / thirdparty / bird.git / commitdiff
