[IPV6] MLDv2: fix change records when transitioning to/from inactive

[mv-sheeva.git] / net / ipv6 / mcast.c

diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 6c05c7978bef2cf469111dfd891c5052a587dfac..4420948a1bfe9f23ec29de602551dd6bca9cbcf3 100644 (file)
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1252,8 +1252,7 @@ int igmp6_event_query(struct sk_buff *skb)
                }
        } else {
                for (ma = idev->mc_list; ma; ma=ma->next) {
-                       if (group_type != IPV6_ADDR_ANY &&
-                           !ipv6_addr_equal(group, &ma->mca_addr))
+                       if (!ipv6_addr_equal(group, &ma->mca_addr))
                                continue;
                        spin_lock_bh(&ma->mca_lock);
                        if (ma->mca_flags & MAF_TIMER_RUNNING) {
@@ -1268,11 +1267,10 @@ int igmp6_event_query(struct sk_buff *skb)
                                        ma->mca_flags &= ~MAF_GSQUERY;
                        }
                        if (!(ma->mca_flags & MAF_GSQUERY) ||
-                          mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs))
+                           mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs))
                                igmp6_group_queried(ma, max_delay);
                        spin_unlock_bh(&ma->mca_lock);
-                       if (group_type != IPV6_ADDR_ANY)
-                               break;
+                       break;
                }
        }
        read_unlock_bh(&idev->lock);
@@ -1351,7 +1349,7 @@ static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
                         * in all filters
                         */
                        if (psf->sf_count[MCAST_INCLUDE])
-                               return 0;
+                               return type == MLD2_MODE_IS_INCLUDE;
                        return pmc->mca_sfcount[MCAST_EXCLUDE] ==
                                psf->sf_count[MCAST_EXCLUDE];
                }
@@ -1966,7 +1964,7 @@ static void sf_markstate(struct ifmcaddr6 *pmc)
 
 static int sf_setstate(struct ifmcaddr6 *pmc)
 {
-       struct ip6_sf_list *psf;
+       struct ip6_sf_list *psf, *dpsf;
        int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
        int qrv = pmc->idev->mc_qrv;
        int new_in, rv;
@@ -1978,8 +1976,48 @@ static int sf_setstate(struct ifmcaddr6 *pmc)
                                !psf->sf_count[MCAST_INCLUDE];
                } else
                        new_in = psf->sf_count[MCAST_INCLUDE] != 0;
-               if (new_in != psf->sf_oldin) {
-                       psf->sf_crcount = qrv;
+               if (new_in) {
+                       if (!psf->sf_oldin) {
+                               struct ip6_sf_list *prev = 0;
+
+                               for (dpsf=pmc->mca_tomb; dpsf;
+                                    dpsf=dpsf->sf_next) {
+                                       if (ipv6_addr_equal(&dpsf->sf_addr,
+                                           &psf->sf_addr))
+                                               break;
+                                       prev = dpsf;
+                               }
+                               if (dpsf) {
+                                       if (prev)
+                                               prev->sf_next = dpsf->sf_next;
+                                       else
+                                               pmc->mca_tomb = dpsf->sf_next;
+                                       kfree(dpsf);
+                               }
+                               psf->sf_crcount = qrv;
+                               rv++;
+                       }
+               } else if (psf->sf_oldin) {
+                       psf->sf_crcount = 0;
+                       /*
+                        * add or update "delete" records if an active filter
+                        * is now inactive
+                        */
+                       for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
+                               if (ipv6_addr_equal(&dpsf->sf_addr,
+                                   &psf->sf_addr))
+                                       break;
+                       if (!dpsf) {
+                               dpsf = (struct ip6_sf_list *)
+                                       kmalloc(sizeof(*dpsf), GFP_ATOMIC);
+                               if (!dpsf)
+                                       continue;
+                               *dpsf = *psf;
+                               /* pmc->mca_lock held by callers */
+                               dpsf->sf_next = pmc->mca_tomb;
+                               pmc->mca_tomb = dpsf;
+                       }
+                       dpsf->sf_crcount = qrv;
                        rv++;
                }
        }