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authorYuval Mintz <yuvalm@mellanox.com>2018-02-28 23:29:36 +0200
committerDavid S. Miller <davem@davemloft.net>2018-03-01 13:13:23 -0500
commitc8d6196803265484f7e1cdd1b00a188dc59a5988 (patch)
tree268700786a50db78ae60ba4bdbe34bb9d6c4069f /include/linux/mroute_base.h
parent845c9a7ae7f5342ba42280c3a2f2aa92bce641d7 (diff)
ipmr, ip6mr: Unite mfc seq logic
With the exception of the final dump, ipmr and ip6mr have the exact same seq logic for traversing a given mr_table. Refactor that code and make it common. Signed-off-by: Yuval Mintz <yuvalm@mellanox.com> Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/mroute_base.h')
-rw-r--r--include/linux/mroute_base.h69
1 files changed, 69 insertions, 0 deletions
diff --git a/include/linux/mroute_base.h b/include/linux/mroute_base.h
index 46a082e25dab..a007c5ad0fde 100644
--- a/include/linux/mroute_base.h
+++ b/include/linux/mroute_base.h
@@ -3,6 +3,7 @@
#include <linux/netdevice.h>
#include <linux/rhashtable.h>
+#include <linux/spinlock.h>
#include <net/net_namespace.h>
#include <net/sock.h>
@@ -203,4 +204,72 @@ static inline void *mr_mfc_find(struct mr_table *mrt, void *hasharg)
{
return mr_mfc_find_parent(mrt, hasharg, -1);
}
+
+#ifdef CONFIG_PROC_FS
+struct mr_mfc_iter {
+ struct seq_net_private p;
+ struct mr_table *mrt;
+ struct list_head *cache;
+
+ /* Lock protecting the mr_table's unresolved queue */
+ spinlock_t *lock;
+};
+
+#ifdef CONFIG_IP_MROUTE_COMMON
+/* These actually return 'struct mr_mfc *', but to avoid need for explicit
+ * castings they simply return void.
+ */
+void *mr_mfc_seq_idx(struct net *net,
+ struct mr_mfc_iter *it, loff_t pos);
+void *mr_mfc_seq_next(struct seq_file *seq, void *v,
+ loff_t *pos);
+
+static inline void *mr_mfc_seq_start(struct seq_file *seq, loff_t *pos,
+ struct mr_table *mrt, spinlock_t *lock)
+{
+ struct mr_mfc_iter *it = seq->private;
+
+ it->mrt = mrt;
+ it->cache = NULL;
+ it->lock = lock;
+
+ return *pos ? mr_mfc_seq_idx(seq_file_net(seq),
+ seq->private, *pos - 1)
+ : SEQ_START_TOKEN;
+}
+
+static inline void mr_mfc_seq_stop(struct seq_file *seq, void *v)
+{
+ struct mr_mfc_iter *it = seq->private;
+ struct mr_table *mrt = it->mrt;
+
+ if (it->cache == &mrt->mfc_unres_queue)
+ spin_unlock_bh(it->lock);
+ else if (it->cache == &mrt->mfc_cache_list)
+ rcu_read_unlock();
+}
+#else
+static inline void *mr_mfc_seq_idx(struct net *net,
+ struct mr_mfc_iter *it, loff_t pos)
+{
+ return NULL;
+}
+
+static inline void *mr_mfc_seq_next(struct seq_file *seq, void *v,
+ loff_t *pos)
+{
+ return NULL;
+}
+
+static inline void *mr_mfc_seq_start(struct seq_file *seq, loff_t *pos,
+ struct mr_table *mrt, spinlock_t *lock)
+{
+ return NULL;
+}
+
+static inline void mr_mfc_seq_stop(struct seq_file *seq, void *v)
+{
+}
+#endif
+#endif
#endif