lockd: Use sockaddr_storage + length for h_addr field

To store larger addresses in the nlm_host structure, make h_addr a
sockaddr_storage, and add an address length field.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

1 files changed, 15 insertions, 1 deletions

diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index 0691efbd0b3..41d7a8e61ce 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -38,7 +38,8 @@
  */
 struct nlm_host {
         struct hlist_node       h_hash;         /* doubly linked list */
-        struct sockaddr_in      h_addr;         /* peer address */
+        struct sockaddr_storage h_addr;         /* peer address */
+        size_t                  h_addrlen;
         struct sockaddr_in      h_saddr;        /* our address (optional) */
         struct rpc_clnt *       h_rpcclnt;      /* RPC client to talk to peer */
         char *                  h_name;         /* remote hostname */
@@ -77,6 +78,19 @@ struct nsm_handle {
 };
 
 /*
+ * Rigorous type checking on sockaddr type conversions
+ */
+static inline struct sockaddr_in *nlm_addr_in(const struct nlm_host *host)
+{
+        return (struct sockaddr_in *)&host->h_addr;
+}
+
+static inline struct sockaddr *nlm_addr(const struct nlm_host *host)
+{
+        return (struct sockaddr *)&host->h_addr;
+}
+
+/*
  * Map an fl_owner_t into a unique 32-bit "pid"
  */
 struct nlm_lockowner {