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bgpd: add comment on bgp_attr_intern

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This is confusing enough to warrant a comment.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
This commit is contained in:
David Lamparter 2017-09-07 15:27:12 +02:00
parent 821127e041
commit dbbac180c1
1 changed files with 6 additions and 0 deletions
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6
bgpd/bgp_attr.c
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@ -690,6 +690,12 @@ struct attr *bgp_attr_intern(struct attr *attr)
}
#endif
/* At this point, attr only contains intern'd pointers. that means
* if we find it in attrhash, it has all the same pointers and we
* correctly updated the refcounts on these.
* If we don't find it, we need to allocate a one because in all
* cases this returns a new reference to a hashed attr, but the input
* wasn't on hash. */
find = (struct attr *)hash_get(attrhash, attr, bgp_attr_hash_alloc);
find->refcnt++;