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bgpd: Convert attr->transit to use accessor functions

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Convert the `struct attr`->transit variable to use
accessor functions.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>
This commit is contained in:
Donald Sharp 2020-11-02 12:09:25 -05:00
parent d04ac434f0
commit 04fb21e22e
3 changed files with 56 additions and 28 deletions
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66
bgpd/bgp_attr.c
View file

@ -667,8 +667,8 @@ unsigned int attrhash_key_make(const void *p)
MIX(ecommunity_hash_make(bgp_attr_get_ipv6_ecommunity(attr)));
if (attr->cluster)
MIX(cluster_hash_key_make(attr->cluster));
if (attr->transit)
MIX(transit_hash_key_make(attr->transit));
if (bgp_attr_get_transit(attr))
MIX(transit_hash_key_make(bgp_attr_get_transit(attr)));
if (attr->encap_subtlvs)
MIX(encap_hash_key_make(attr->encap_subtlvs));
#ifdef ENABLE_BGP_VNC
@ -707,7 +707,8 @@ bool attrhash_cmp(const void *p1, const void *p2)
== bgp_attr_get_ipv6_ecommunity(attr2)
&& attr1->lcommunity == attr2->lcommunity
&& attr1->cluster == attr2->cluster
&& attr1->transit == attr2->transit
&& bgp_attr_get_transit(attr1)
== bgp_attr_get_transit(attr2)
&& attr1->rmap_table_id == attr2->rmap_table_id
&& (attr1->encap_tunneltype == attr2->encap_tunneltype)
&& encap_same(attr1->encap_subtlvs, attr2->encap_subtlvs)
@ -859,11 +860,14 @@ struct attr *bgp_attr_intern(struct attr *attr)
else
attr->cluster->refcnt++;
}
if (attr->transit) {
if (!attr->transit->refcnt)
attr->transit = transit_intern(attr->transit);
struct transit *transit = bgp_attr_get_transit(attr);
if (transit) {
if (!transit->refcnt)
bgp_attr_set_transit(attr, transit_intern(transit));
else
attr->transit->refcnt++;
transit->refcnt++;
}
if (attr->encap_subtlvs) {
if (!attr->encap_subtlvs->refcnt)
@ -1066,8 +1070,12 @@ void bgp_attr_unintern_sub(struct attr *attr)
cluster_unintern(&attr->cluster);
UNSET_FLAG(attr->flag, ATTR_FLAG_BIT(BGP_ATTR_CLUSTER_LIST));
if (attr->transit)
transit_unintern(&attr->transit);
struct transit *transit = bgp_attr_get_transit(attr);
if (transit) {
transit_unintern(&transit);
bgp_attr_set_transit(attr, transit);
}
if (attr->encap_subtlvs)
encap_unintern(&attr->encap_subtlvs, ENCAP_SUBTLV_TYPE);
@ -1154,9 +1162,12 @@ void bgp_attr_flush(struct attr *attr)
cluster_free(attr->cluster);
attr->cluster = NULL;
}
if (attr->transit && !attr->transit->refcnt) {
transit_free(attr->transit);
attr->transit = NULL;
struct transit *transit = bgp_attr_get_transit(attr);
if (transit && !transit->refcnt) {
transit_free(transit);
bgp_attr_set_transit(attr, NULL);
}
if (attr->encap_subtlvs && !attr->encap_subtlvs->refcnt) {
encap_free(attr->encap_subtlvs);
@ -2848,10 +2859,9 @@ static bgp_attr_parse_ret_t bgp_attr_unknown(struct bgp_attr_parser_args *args)
SET_FLAG(*startp, BGP_ATTR_FLAG_PARTIAL);
/* Store transitive attribute to the end of attr->transit. */
if (!attr->transit)
attr->transit = XCALLOC(MTYPE_TRANSIT, sizeof(struct transit));
transit = attr->transit;
transit = bgp_attr_get_transit(attr);
if (!transit)
transit = XCALLOC(MTYPE_TRANSIT, sizeof(struct transit));
if (transit->val)
transit->val = XREALLOC(MTYPE_TRANSIT_VAL, transit->val,
@ -2861,6 +2871,7 @@ static bgp_attr_parse_ret_t bgp_attr_unknown(struct bgp_attr_parser_args *args)
memcpy(transit->val + transit->length, startp, total);
transit->length += total;
bgp_attr_set_transit(attr, transit);
return BGP_ATTR_PARSE_PROCEED;
}
@ -2933,6 +2944,7 @@ bgp_attr_parse_ret_t bgp_attr_parse(struct peer *peer, struct attr *attr,
struct aspath *as4_path = NULL;
as_t as4_aggregator = 0;
struct in_addr as4_aggregator_addr = {.s_addr = 0};
struct transit *transit;
/* Initialize bitmap. */
memset(seen, 0, BGP_ATTR_BITMAP_SIZE);
@ -3298,10 +3310,11 @@ done:
aspath_unintern(&as4_path);
}
transit = bgp_attr_get_transit(attr);
if (ret != BGP_ATTR_PARSE_ERROR) {
/* Finally intern unknown attribute. */
if (attr->transit)
attr->transit = transit_intern(attr->transit);
if (transit)
bgp_attr_set_transit(attr, transit_intern(transit));
if (attr->encap_subtlvs)
attr->encap_subtlvs = encap_intern(attr->encap_subtlvs,
ENCAP_SUBTLV_TYPE);
@ -3311,17 +3324,18 @@ done:
VNC_SUBTLV_TYPE);
#endif
} else {
if (attr->transit) {
transit_free(attr->transit);
attr->transit = NULL;
if (transit) {
transit_free(transit);
bgp_attr_set_transit(attr, NULL);
}
bgp_attr_flush_encap(attr);
};
/* Sanity checks */
if (attr->transit)
assert(attr->transit->refcnt > 0);
transit = bgp_attr_get_transit(attr);
if (transit)
assert(transit->refcnt > 0);
if (attr->encap_subtlvs)
assert(attr->encap_subtlvs->refcnt > 0);
#ifdef ENABLE_BGP_VNC
@ -4131,8 +4145,10 @@ bgp_size_t bgp_packet_attribute(struct bgp *bgp, struct peer *peer,
}
/* Unknown transit attribute. */
if (attr->transit)
stream_put(s, attr->transit->val, attr->transit->length);
struct transit *transit = bgp_attr_get_transit(attr);
if (transit)
stream_put(s, transit->val, transit->length);
/* Return total size of attribute. */
return stream_get_endp(s) - cp;

10
bgpd/bgp_attr.h
View file

@ -481,4 +481,14 @@ static inline void bgp_attr_set_ipv6_ecommunity(struct attr *attr,
attr->ipv6_ecommunity = ipv6_ecomm;
}
static inline struct transit *bgp_attr_get_transit(const struct attr *attr)
{
return attr->transit;
}
static inline void bgp_attr_set_transit(struct attr *attr,
struct transit *transit)
{
attr->transit = transit;
}
#endif /* _QUAGGA_BGP_ATTR_H */

8
bgpd/rfapi/rfapi_vty.c
View file

@ -456,7 +456,7 @@ void rfapiPrintAttrPtrs(void *stream, struct attr *attr)
struct vty *vty;
void *out;
const char *vty_newline;
struct transit *transit;
char buf[BUFSIZ];
if (rfapiStream2Vty(stream, &fp, &vty, &out, &vty_newline) == 0)
@ -479,8 +479,10 @@ void rfapiPrintAttrPtrs(void *stream, struct attr *attr)
(attr->ecommunity ? attr->ecommunity->refcnt : 0), HVTYNL);
fp(out, " cluster=%p, refcnt=%d%s", attr->cluster,
(attr->cluster ? attr->cluster->refcnt : 0), HVTYNL);
fp(out, " transit=%p, refcnt=%d%s", attr->transit,
(attr->transit ? attr->transit->refcnt : 0), HVTYNL);
transit = bgp_attr_get_transit(attr);
fp(out, " transit=%p, refcnt=%d%s", transit,
(transit ? transit->refcnt : 0), HVTYNL);
}
/*