sctp: add sock_reuseport for the sock in __sctp_hash_endpoint

[linux.git] / net / sctp / bind_addr.c

diff --git a/net/sctp/bind_addr.c b/net/sctp/bind_addr.c
index 7df3704982f547eda452cac2131afae81a5c7e9e..ebf28adba78903dde891008818f5e44cd64ac90e 100644 (file)
--- a/net/sctp/bind_addr.c
+++ b/net/sctp/bind_addr.c
@@ -337,6 +337,34 @@ int sctp_bind_addr_match(struct sctp_bind_addr *bp,
        return match;
 }
 
+int sctp_bind_addrs_check(struct sctp_sock *sp,
+                         struct sctp_sock *sp2, int cnt2)
+{
+       struct sctp_bind_addr *bp2 = &sp2->ep->base.bind_addr;
+       struct sctp_bind_addr *bp = &sp->ep->base.bind_addr;
+       struct sctp_sockaddr_entry *laddr, *laddr2;
+       bool exist = false;
+       int cnt = 0;
+
+       rcu_read_lock();
+       list_for_each_entry_rcu(laddr, &bp->address_list, list) {
+               list_for_each_entry_rcu(laddr2, &bp2->address_list, list) {
+                       if (sp->pf->af->cmp_addr(&laddr->a, &laddr2->a) &&
+                           laddr->valid && laddr2->valid) {
+                               exist = true;
+                               goto next;
+                       }
+               }
+               cnt = 0;
+               break;
+next:
+               cnt++;
+       }
+       rcu_read_unlock();
+
+       return (cnt == cnt2) ? 0 : (exist ? -EEXIST : 1);
+}
+
 /* Does the address 'addr' conflict with any addresses in
  * the bp.
  */