bgpd: store number of labels with 8 bits

8 bits are sufficient to store the number of labels because the current
maximum is 2.

Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>

bgpd/bgp_attr.c

@@ -4128,7 +4128,7 @@ size_t bgp_packet_mpattr_start(struct stream *s, struct peer *peer, afi_t afi,
 void bgp_packet_mpattr_prefix(struct stream *s, afi_t afi, safi_t safi,
 			      const struct prefix *p,
 			      const struct prefix_rd *prd, mpls_label_t *label,
-			      uint32_t num_labels, bool addpath_capable,
+			      uint8_t num_labels, bool addpath_capable,
 			      uint32_t addpath_tx_id, struct attr *attr)
 {
 	switch (safi) {
@@ -4341,7 +4341,7 @@ bgp_size_t bgp_packet_attribute(struct bgp *bgp, struct peer *peer,
 				struct bpacket_attr_vec_arr *vecarr,
 				struct prefix *p, afi_t afi, safi_t safi,
 				struct peer *from, struct prefix_rd *prd,
-				mpls_label_t *label, uint32_t num_labels,
+				mpls_label_t *label, uint8_t num_labels,
 				bool addpath_capable, uint32_t addpath_tx_id,
 				struct bgp_path_info *bpi)
 {
@@ -4921,7 +4921,7 @@ size_t bgp_packet_mpunreach_start(struct stream *s, afi_t afi, safi_t safi)
 void bgp_packet_mpunreach_prefix(struct stream *s, const struct prefix *p,
 				 afi_t afi, safi_t safi,
 				 const struct prefix_rd *prd,
-				 mpls_label_t *label, uint32_t num_labels,
+				 mpls_label_t *label, uint8_t num_labels,
 				 bool addpath_capable, uint32_t addpath_tx_id,
 				 struct attr *attr)
 {

bgpd/bgp_attr.h

@@ -393,7 +393,7 @@ extern bgp_size_t bgp_packet_attribute(
 	struct bgp *bgp, struct peer *peer, struct stream *s, struct attr *attr,
 	struct bpacket_attr_vec_arr *vecarr, struct prefix *p, afi_t afi,
 	safi_t safi, struct peer *from, struct prefix_rd *prd,
-	mpls_label_t *label, uint32_t num_labels, bool addpath_capable,
+	mpls_label_t *label, uint8_t num_labels, bool addpath_capable,
 	uint32_t addpath_tx_id, struct bgp_path_info *bpi);
 extern void bgp_dump_routes_attr(struct stream *s, struct bgp_path_info *bpi,
 				 const struct prefix *p);
@@ -451,7 +451,7 @@ extern size_t bgp_packet_mpattr_start(struct stream *s, struct peer *peer,
 extern void bgp_packet_mpattr_prefix(struct stream *s, afi_t afi, safi_t safi,
 				     const struct prefix *p,
 				     const struct prefix_rd *prd,
-				     mpls_label_t *label, uint32_t num_labels,
+				     mpls_label_t *label, uint8_t num_labels,
 				     bool addpath_capable,
 				     uint32_t addpath_tx_id, struct attr *);
 extern size_t bgp_packet_mpattr_prefix_size(afi_t afi, safi_t safi,
@@ -462,7 +462,7 @@ extern size_t bgp_packet_mpunreach_start(struct stream *s, afi_t afi,
 					 safi_t safi);
 extern void bgp_packet_mpunreach_prefix(
 	struct stream *s, const struct prefix *p, afi_t afi, safi_t safi,
-	const struct prefix_rd *prd, mpls_label_t *label, uint32_t num_labels,
+	const struct prefix_rd *prd, mpls_label_t *label, uint8_t num_labels,
 	bool addpath_capable, uint32_t addpath_tx_id, struct attr *attr);
 extern void bgp_packet_mpunreach_end(struct stream *s, size_t attrlen_pnt);
 

bgpd/bgp_debug.c

@@ -2722,7 +2722,7 @@ bool bgp_debug_zebra(const struct prefix *p)
 const char *bgp_debug_rdpfxpath2str(afi_t afi, safi_t safi,
 				    const struct prefix_rd *prd,
 				    union prefixconstptr pu,
-				    mpls_label_t *label, uint32_t num_labels,
+				    mpls_label_t *label, uint8_t num_labels,
 				    int addpath_valid, uint32_t addpath_id,
 				    struct bgp_route_evpn *overlay_index,
 				    char *str, int size)

bgpd/bgp_debug.h

@@ -178,7 +178,7 @@ extern bool bgp_debug_zebra(const struct prefix *p);
 
 extern const char *bgp_debug_rdpfxpath2str(
 	afi_t afi, safi_t safi, const struct prefix_rd *prd,
-	union prefixconstptr pu, mpls_label_t *label, uint32_t num_labels,
+	union prefixconstptr pu, mpls_label_t *label, uint8_t num_labels,
 	int addpath_valid, uint32_t addpath_id,
 	struct bgp_route_evpn *overlay_index, char *str, int size);
 const char *bgp_notify_admin_message(char *buf, size_t bufsz, uint8_t *data,

bgpd/bgp_evpn.c

@@ -1882,7 +1882,7 @@ static int update_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn,
 	struct attr *attr_new;
 	struct attr local_attr;
 	mpls_label_t label[BGP_MAX_LABELS];
-	uint32_t num_labels = 1;
+	uint8_t num_labels = 1;
 	int route_change = 1;
 	uint8_t sticky = 0;
 	const struct prefix_evpn *evp;
@@ -4612,7 +4612,7 @@ static int process_type2_route(struct peer *peer, afi_t afi, safi_t safi,
 	uint8_t macaddr_len;
 	/* holds the VNI(s) as in packet */
 	mpls_label_t label[BGP_MAX_LABELS] = {};
-	uint32_t num_labels = 0;
+	uint8_t num_labels = 0;
 	uint32_t eth_tag;
 	int ret = 0;
 
@@ -4955,7 +4955,7 @@ static int process_type5_route(struct peer *peer, afi_t afi, safi_t safi,
 
 static void evpn_mpattr_encode_type5(struct stream *s, const struct prefix *p,
 				     const struct prefix_rd *prd,
-				     mpls_label_t *label, uint32_t num_labels,
+				     mpls_label_t *label, uint8_t num_labels,
 				     struct attr *attr)
 {
 	int len;
@@ -5745,7 +5745,7 @@ int bgp_evpn_uninstall_routes(struct bgp *bgp, struct bgpevpn *vpn)
 /*
  * TODO: Hardcoded for a maximum of 2 VNIs right now
  */
-char *bgp_evpn_label2str(mpls_label_t *label, uint32_t num_labels, char *buf,
+char *bgp_evpn_label2str(mpls_label_t *label, uint8_t num_labels, char *buf,
 			 int len)
 {
 	vni_t vni1, vni2;
@@ -5829,7 +5829,7 @@ void bgp_evpn_route2json(const struct prefix_evpn *p, json_object *json)
  */
 void bgp_evpn_encode_prefix(struct stream *s, const struct prefix *p,
 			    const struct prefix_rd *prd, mpls_label_t *label,
-			    uint32_t num_labels, struct attr *attr,
+			    uint8_t num_labels, struct attr *attr,
 			    bool addpath_capable, uint32_t addpath_tx_id)
 {
 	struct prefix_evpn *evp = (struct prefix_evpn *)p;
@@ -7659,7 +7659,7 @@ void bgp_evpn_handle_resolve_overlay_index_unset(struct hash_bucket *bucket,
  *
  */
 mpls_label_t *bgp_evpn_path_info_labels_get_l3vni(mpls_label_t *labels,
-						  uint32_t num_labels)
+						  uint8_t num_labels)
 {
 	if (!labels)
 		return NULL;

bgpd/bgp_evpn.h

@@ -115,12 +115,12 @@ extern void bgp_evpn_advertise_type5_routes(struct bgp *bgp_vrf, afi_t afi,
 					    safi_t safi);
 extern void bgp_evpn_vrf_delete(struct bgp *bgp_vrf);
 extern void bgp_evpn_handle_router_id_update(struct bgp *bgp, int withdraw);
-extern char *bgp_evpn_label2str(mpls_label_t *label, uint32_t num_labels,
+extern char *bgp_evpn_label2str(mpls_label_t *label, uint8_t num_labels,
 				char *buf, int len);
 extern void bgp_evpn_route2json(const struct prefix_evpn *p, json_object *json);
 extern void bgp_evpn_encode_prefix(struct stream *s, const struct prefix *p,
 				   const struct prefix_rd *prd,
-				   mpls_label_t *label, uint32_t num_labels,
+				   mpls_label_t *label, uint8_t num_labels,
 				   struct attr *attr, bool addpath_capable,
 				   uint32_t addpath_tx_id);
 extern int bgp_nlri_parse_evpn(struct peer *peer, struct attr *attr,
@@ -177,7 +177,7 @@ extern void
 bgp_evpn_handle_resolve_overlay_index_unset(struct hash_bucket *bucket,
 					    void *arg);
 extern mpls_label_t *bgp_evpn_path_info_labels_get_l3vni(mpls_label_t *labels,
-							 uint32_t num_labels);
+							 uint8_t num_labels);
 extern vni_t bgp_evpn_path_info_get_l3vni(const struct bgp_path_info *pi);
 extern bool bgp_evpn_mpath_has_dvni(const struct bgp *bgp_vrf,
 				    struct bgp_path_info *mpinfo);

bgpd/bgp_label.c

@@ -472,8 +472,8 @@ int bgp_nlri_parse_label(struct peer *peer, struct attr *attr,
 	return BGP_NLRI_PARSE_OK;
 }
 
-bool bgp_labels_same(const mpls_label_t *tbl_a, const uint32_t num_labels_a,
-		     const mpls_label_t *tbl_b, const uint32_t num_labels_b)
+bool bgp_labels_same(const mpls_label_t *tbl_a, const uint8_t num_labels_a,
+		     const mpls_label_t *tbl_b, const uint8_t num_labels_b)
 {
 	uint32_t i;
 

bgpd/bgp_label.h

@@ -27,9 +27,9 @@ extern mpls_label_t bgp_adv_label(struct bgp_dest *dest,
 extern int bgp_nlri_parse_label(struct peer *peer, struct attr *attr,
 				struct bgp_nlri *packet);
 extern bool bgp_labels_same(const mpls_label_t *tbl_a,
-			    const uint32_t num_labels_a,
+			    const uint8_t num_labels_a,
 			    const mpls_label_t *tbl_b,
-			    const uint32_t num_labels_b);
+			    const uint8_t num_labels_b);
 
 static inline int bgp_labeled_safi(safi_t safi)
 {

bgpd/bgp_mac.c

@@ -125,7 +125,7 @@ static void bgp_process_mac_rescan_table(struct bgp *bgp, struct peer *peer,
 {
 	struct bgp_dest *pdest, *dest;
 	struct bgp_path_info *pi;
-	uint32_t num_labels;
+	uint8_t num_labels;
 	mpls_label_t *label_pnt;
 
 	for (pdest = bgp_table_top(table); pdest;

bgpd/bgp_mplsvpn.c

@@ -962,7 +962,7 @@ void transpose_sid(struct in6_addr *sid, uint32_t label, uint8_t offset,
  */
 static void setlabels(struct bgp_path_info *bpi,
 		      mpls_label_t *label, /* array of labels */
-		      uint32_t num_labels)
+		      uint8_t num_labels)
 {
 	if (num_labels)
 		assert(label);
@@ -975,7 +975,7 @@ static void setlabels(struct bgp_path_info *bpi,
 	}
 
 	struct bgp_path_info_extra *extra = bgp_path_info_extra_get(bpi);
-	uint32_t i;
+	uint8_t i;
 
 	for (i = 0; i < num_labels; ++i) {
 		extra->label[i] = label[i];
@@ -1064,7 +1064,7 @@ static struct bgp_path_info *
 leak_update(struct bgp *to_bgp, struct bgp_dest *bn,
 	    struct attr *new_attr, /* already interned */
 	    afi_t afi, safi_t safi, struct bgp_path_info *source_bpi,
-	    mpls_label_t *label, uint32_t num_labels, struct bgp *bgp_orig,
+	    mpls_label_t *label, uint8_t num_labels, struct bgp *bgp_orig,
 	    struct prefix *nexthop_orig, int nexthop_self_flag, int debug)
 {
 	const struct prefix *p = bgp_dest_get_prefix(bn);
@@ -2073,7 +2073,7 @@ static void vpn_leak_to_vrf_update_onevrf(struct bgp *to_bgp,   /* to */
 	const char *debugmsg;
 	struct prefix nexthop_orig;
 	mpls_label_t *label_pnt = NULL;
-	uint32_t num_labels = 0;
+	uint8_t num_labels = 0;
 	int nexthop_self_flag = 1;
 	struct bgp_path_info *bpi_ultimate = NULL;
 	struct bgp_path_info *bpi;
@@ -3957,7 +3957,7 @@ static void bgp_mplsvpn_nh_label_bind_send_nexthop_label(
 	struct bgp_mplsvpn_nh_label_bind_cache *bmnc, int cmd)
 {
 	struct prefix pfx_nh, *p = NULL;
-	uint32_t num_labels = 0, lsp_num_labels;
+	uint8_t num_labels = 0, lsp_num_labels;
 	mpls_label_t label[MPLS_MAX_LABELS];
 	struct nexthop *nh;
 	ifindex_t ifindex = IFINDEX_INTERNAL;

bgpd/bgp_route.c

@@ -294,7 +294,7 @@ bool bgp_path_info_has_valid_label(const struct bgp_path_info *path)
 bool bgp_path_info_labels_same(const struct bgp_path_info *bpi,
 			       const mpls_label_t *label, uint32_t n)
 {
-	uint32_t bpi_num_labels;
+	uint8_t bpi_num_labels;
 	const mpls_label_t *bpi_label;
 
 	bpi_num_labels = bgp_path_info_num_labels(bpi);
@@ -304,7 +304,7 @@ bool bgp_path_info_labels_same(const struct bgp_path_info *bpi,
 			       (const mpls_label_t *)label, n);
 }
 
-uint32_t bgp_path_info_num_labels(const struct bgp_path_info *pi)
+uint8_t bgp_path_info_num_labels(const struct bgp_path_info *pi)
 {
 	if (!pi)
 		return 0;
@@ -1782,7 +1782,7 @@ static bool bgp_check_role_applicability(afi_t afi, safi_t safi)
 static int bgp_input_modifier(struct peer *peer, const struct prefix *p,
 			      struct attr *attr, afi_t afi, safi_t safi,
 			      const char *rmap_name, mpls_label_t *label,
-			      uint32_t num_labels, struct bgp_dest *dest)
+			      uint8_t num_labels, struct bgp_dest *dest)
 {
 	struct bgp_filter *filter;
 	struct bgp_path_info rmap_path = { 0 };
@@ -4206,7 +4206,7 @@ static bool bgp_accept_own(struct peer *peer, afi_t afi, safi_t safi,
 void bgp_update(struct peer *peer, const struct prefix *p, uint32_t addpath_id,
 		struct attr *attr, afi_t afi, safi_t safi, int type,
 		int sub_type, struct prefix_rd *prd, mpls_label_t *label,
-		uint32_t num_labels, int soft_reconfig,
+		uint8_t num_labels, int soft_reconfig,
 		struct bgp_route_evpn *evpn)
 {
 	int ret;
@@ -5119,7 +5119,7 @@ void bgp_update(struct peer *peer, const struct prefix *p, uint32_t addpath_id,
 void bgp_withdraw(struct peer *peer, const struct prefix *p,
 		  uint32_t addpath_id, afi_t afi, safi_t safi, int type,
 		  int sub_type, struct prefix_rd *prd, mpls_label_t *label,
-		  uint32_t num_labels, struct bgp_route_evpn *evpn)
+		  uint8_t num_labels, struct bgp_route_evpn *evpn)
 {
 	struct bgp *bgp;
 	char pfx_buf[BGP_PRD_PATH_STRLEN];
@@ -5346,7 +5346,7 @@ static void bgp_soft_reconfig_table_update(struct peer *peer,
 					   safi_t safi, struct prefix_rd *prd)
 {
 	struct bgp_path_info *pi;
-	uint32_t num_labels;
+	uint8_t num_labels;
 	mpls_label_t *label_pnt;
 	struct bgp_route_evpn evpn;
 
@@ -6367,7 +6367,7 @@ void bgp_static_update(struct bgp *bgp, const struct prefix *p,
 	int vnc_implicit_withdraw = 0;
 	mpls_label_t label = MPLS_INVALID_LABEL;
 #endif
-	uint32_t num_labels = 0;
+	uint8_t num_labels = 0;
 
 	assert(bgp_static);
 

bgpd/bgp_route.h

@@ -238,7 +238,7 @@ struct bgp_path_info_extra {
 
 	/* MPLS label(s) - VNI(s) for EVPN-VxLAN  */
 	mpls_label_t label[BGP_MAX_LABELS];
-	uint32_t num_labels;
+	uint8_t num_labels;
 
 	/* timestamp of the rib installation */
 	time_t bgp_rib_uptime;
@@ -751,7 +751,7 @@ extern void bgp_path_info_delete(struct bgp_dest *dest,
 extern struct bgp_path_info_extra *
 bgp_path_info_extra_get(struct bgp_path_info *path);
 extern bool bgp_path_info_has_valid_label(const struct bgp_path_info *path);
-extern uint32_t bgp_path_info_num_labels(const struct bgp_path_info *pi);
+extern uint8_t bgp_path_info_num_labels(const struct bgp_path_info *pi);
 extern void bgp_path_info_set_flag(struct bgp_dest *dest,
 				   struct bgp_path_info *path, uint32_t flag);
 extern void bgp_path_info_unset_flag(struct bgp_dest *dest,
@@ -796,12 +796,12 @@ extern void bgp_update(struct peer *peer, const struct prefix *p,
 		       uint32_t addpath_id, struct attr *attr, afi_t afi,
 		       safi_t safi, int type, int sub_type,
 		       struct prefix_rd *prd, mpls_label_t *label,
-		       uint32_t num_labels, int soft_reconfig,
+		       uint8_t num_labels, int soft_reconfig,
 		       struct bgp_route_evpn *evpn);
 extern void bgp_withdraw(struct peer *peer, const struct prefix *p,
 			 uint32_t addpath_id, afi_t afi, safi_t safi, int type,
 			 int sub_type, struct prefix_rd *prd,
-			 mpls_label_t *label, uint32_t num_labels,
+			 mpls_label_t *label, uint8_t num_labels,
 			 struct bgp_route_evpn *evpn);
 
 /* for bgp_nexthop and bgp_damp */

bgpd/bgp_rpki.c

@@ -657,7 +657,7 @@ static void revalidate_bgp_node(struct bgp_dest *bgp_dest, afi_t afi,
 {
 	struct bgp_adj_in *ain;
 	mpls_label_t *label;
-	uint32_t num_labels;
+	uint8_t num_labels;
 
 	for (ain = bgp_dest->adj_in; ain; ain = ain->next) {
 		struct bgp_path_info *path =

bgpd/bgp_updgrp_packet.c

@@ -665,7 +665,7 @@ struct bpacket *subgroup_update_packet(struct update_subgroup *subgrp)
 	uint32_t addpath_tx_id = 0;
 	struct prefix_rd *prd = NULL;
 	mpls_label_t label = MPLS_INVALID_LABEL, *label_pnt = NULL;
-	uint32_t num_labels = 0;
+	uint8_t num_labels = 0;
 
 	if (!subgrp)
 		return NULL;
@@ -1082,7 +1082,7 @@ void subgroup_default_update_packet(struct update_subgroup *subgrp,
 	struct bpacket_attr_vec_arr vecarr;
 	bool addpath_capable = false;
 	mpls_label_t label = MPLS_LABEL_IMPLICIT_NULL;
-	uint32_t num_labels = 0;
+	uint8_t num_labels = 0;
 
 	if (DISABLE_BGP_ANNOUNCE)
 		return;

bgpd/bgp_zebra.c

@@ -1243,7 +1243,7 @@ static void bgp_zebra_announce_parse_nexthop(
 	struct bgp_path_info local_info;
 	struct bgp_path_info *mpinfo_cp = &local_info;
 	mpls_label_t *labels;
-	uint32_t num_labels = 0;
+	uint8_t num_labels = 0;
 	mpls_label_t nh_label;
 	int nh_othervrf = 0;
 	bool nh_updated = false;
@@ -3904,8 +3904,7 @@ int bgp_zebra_srv6_manager_release_locator_chunk(const char *name)
 void bgp_zebra_send_nexthop_label(int cmd, mpls_label_t label,
 				  ifindex_t ifindex, vrf_id_t vrf_id,
 				  enum lsp_types_t ltype, struct prefix *p,
-				  uint32_t num_labels,
-				  mpls_label_t out_labels[])
+				  uint8_t num_labels, mpls_label_t out_labels[])
 {
 	struct zapi_labels zl = {};
 	struct zapi_nexthop *znh;

bgpd/bgp_zebra.h

@@ -122,7 +122,7 @@ extern int bgp_zebra_srv6_manager_release_locator_chunk(const char *name);
 extern void bgp_zebra_send_nexthop_label(int cmd, mpls_label_t label,
 					 ifindex_t index, vrf_id_t vrfid,
 					 enum lsp_types_t ltype,
-					 struct prefix *p, uint32_t num_labels,
+					 struct prefix *p, uint8_t num_labels,
 					 mpls_label_t out_labels[]);
 extern bool bgp_zebra_request_label_range(uint32_t base, uint32_t chunk_size,
 					  bool label_auto);