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-rw-r--r--net/tipc/msg.h31
1 files changed, 29 insertions, 2 deletions
diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index b23619fab968..7ee6ae238147 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -75,6 +75,14 @@ static inline void msg_set_bits(struct tipc_msg *m, u32 w,
m->hdr[w] |= htonl(val);
}
+static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
+{
+ u32 temp = msg->hdr[a];
+
+ msg->hdr[a] = msg->hdr[b];
+ msg->hdr[b] = temp;
+}
+
/*
* Word 0
*/
@@ -119,9 +127,9 @@ static inline int msg_non_seq(struct tipc_msg *m)
return msg_bits(m, 0, 20, 1);
}
-static inline void msg_set_non_seq(struct tipc_msg *m)
+static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
{
- msg_set_bits(m, 0, 20, 1, 1);
+ msg_set_bits(m, 0, 20, 1, n);
}
static inline int msg_dest_droppable(struct tipc_msg *m)
@@ -224,6 +232,25 @@ static inline void msg_set_seqno(struct tipc_msg *m, u32 n)
msg_set_bits(m, 2, 0, 0xffff, n);
}
+/*
+ * TIPC may utilize the "link ack #" and "link seq #" fields of a short
+ * message header to hold the destination node for the message, since the
+ * normal "dest node" field isn't present. This cache is only referenced
+ * when required, so populating the cache of a longer message header is
+ * harmless (as long as the header has the two link sequence fields present).
+ *
+ * Note: Host byte order is OK here, since the info never goes off-card.
+ */
+
+static inline u32 msg_destnode_cache(struct tipc_msg *m)
+{
+ return m->hdr[2];
+}
+
+static inline void msg_set_destnode_cache(struct tipc_msg *m, u32 dnode)
+{
+ m->hdr[2] = dnode;
+}
/*
* Words 3-10