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Diffstat (limited to 'net/ipv4/ipmr_base.c')
-rw-r--r--net/ipv4/ipmr_base.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/net/ipv4/ipmr_base.c b/net/ipv4/ipmr_base.c
index 172f92acffef..37ad0a793035 100644
--- a/net/ipv4/ipmr_base.c
+++ b/net/ipv4/ipmr_base.c
@@ -103,3 +103,65 @@ void *mr_mfc_find_any(struct mr_table *mrt, int vifi, void *hasharg)
return mr_mfc_find_any_parent(mrt, vifi);
}
EXPORT_SYMBOL(mr_mfc_find_any);
+
+#ifdef CONFIG_PROC_FS
+void *mr_mfc_seq_idx(struct net *net,
+ struct mr_mfc_iter *it, loff_t pos)
+{
+ struct mr_table *mrt = it->mrt;
+ struct mr_mfc *mfc;
+
+ rcu_read_lock();
+ it->cache = &mrt->mfc_cache_list;
+ list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list)
+ if (pos-- == 0)
+ return mfc;
+ rcu_read_unlock();
+
+ spin_lock_bh(it->lock);
+ it->cache = &mrt->mfc_unres_queue;
+ list_for_each_entry(mfc, it->cache, list)
+ if (pos-- == 0)
+ return mfc;
+ spin_unlock_bh(it->lock);
+
+ it->cache = NULL;
+ return NULL;
+}
+EXPORT_SYMBOL(mr_mfc_seq_idx);
+
+void *mr_mfc_seq_next(struct seq_file *seq, void *v,
+ loff_t *pos)
+{
+ struct mr_mfc_iter *it = seq->private;
+ struct net *net = seq_file_net(seq);
+ struct mr_table *mrt = it->mrt;
+ struct mr_mfc *c = v;
+
+ ++*pos;
+
+ if (v == SEQ_START_TOKEN)
+ return mr_mfc_seq_idx(net, seq->private, 0);
+
+ if (c->list.next != it->cache)
+ return list_entry(c->list.next, struct mr_mfc, list);
+
+ if (it->cache == &mrt->mfc_unres_queue)
+ goto end_of_list;
+
+ /* exhausted cache_array, show unresolved */
+ rcu_read_unlock();
+ it->cache = &mrt->mfc_unres_queue;
+
+ spin_lock_bh(it->lock);
+ if (!list_empty(it->cache))
+ return list_first_entry(it->cache, struct mr_mfc, list);
+
+end_of_list:
+ spin_unlock_bh(it->lock);
+ it->cache = NULL;
+
+ return NULL;
+}
+EXPORT_SYMBOL(mr_mfc_seq_next);
+#endif