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authorAllan Stephens <allan.stephens@windriver.com>2008-06-04 20:54:48 -0400
committerDavid S. Miller <davem@davemloft.net>2008-06-04 20:54:48 -0400
commit40aecb1b13f50d96616abb612c17e59457f54263 (patch)
tree1c73be75d3bdcda30d2f90d5189bd57920188802
parent99c145939bc1f65f9b946f2b9dd7bfc1f44783d6 (diff)
tipc: Message rejection rework preparatory changes
This patch defines a few new message header manipulation routines, and generalizes the usefulness of another, in preparation for upcoming rework of TIPC's message rejection code. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/tipc/bcast.c2
-rw-r--r--net/tipc/discover.c2
-rw-r--r--net/tipc/msg.h31
3 files changed, 31 insertions, 4 deletions
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 0052c0747d05..a5883b1452ff 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -571,7 +571,7 @@ static int tipc_bcbearer_send(struct sk_buff *buf,
571 assert(tipc_cltr_bcast_nodes.count != 0); 571 assert(tipc_cltr_bcast_nodes.count != 0);
572 bcbuf_set_acks(buf, tipc_cltr_bcast_nodes.count); 572 bcbuf_set_acks(buf, tipc_cltr_bcast_nodes.count);
573 msg = buf_msg(buf); 573 msg = buf_msg(buf);
574 msg_set_non_seq(msg); 574 msg_set_non_seq(msg, 1);
575 msg_set_mc_netid(msg, tipc_net_id); 575 msg_set_mc_netid(msg, tipc_net_id);
576 } 576 }
577 577
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index 64c20284e0f7..1657f0e795ff 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -121,7 +121,7 @@ static struct sk_buff *tipc_disc_init_msg(u32 type,
121 if (buf) { 121 if (buf) {
122 msg = buf_msg(buf); 122 msg = buf_msg(buf);
123 msg_init(msg, LINK_CONFIG, type, DSC_H_SIZE, dest_domain); 123 msg_init(msg, LINK_CONFIG, type, DSC_H_SIZE, dest_domain);
124 msg_set_non_seq(msg); 124 msg_set_non_seq(msg, 1);
125 msg_set_req_links(msg, req_links); 125 msg_set_req_links(msg, req_links);
126 msg_set_dest_domain(msg, dest_domain); 126 msg_set_dest_domain(msg, dest_domain);
127 msg_set_bc_netid(msg, tipc_net_id); 127 msg_set_bc_netid(msg, tipc_net_id);
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,
75 m->hdr[w] |= htonl(val); 75 m->hdr[w] |= htonl(val);
76} 76}
77 77
78static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
79{
80 u32 temp = msg->hdr[a];
81
82 msg->hdr[a] = msg->hdr[b];
83 msg->hdr[b] = temp;
84}
85
78/* 86/*
79 * Word 0 87 * Word 0
80 */ 88 */
@@ -119,9 +127,9 @@ static inline int msg_non_seq(struct tipc_msg *m)
119 return msg_bits(m, 0, 20, 1); 127 return msg_bits(m, 0, 20, 1);
120} 128}
121 129
122static inline void msg_set_non_seq(struct tipc_msg *m) 130static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
123{ 131{
124 msg_set_bits(m, 0, 20, 1, 1); 132 msg_set_bits(m, 0, 20, 1, n);
125} 133}
126 134
127static inline int msg_dest_droppable(struct tipc_msg *m) 135static 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)
224 msg_set_bits(m, 2, 0, 0xffff, n); 232 msg_set_bits(m, 2, 0, 0xffff, n);
225} 233}
226 234
235/*
236 * TIPC may utilize the "link ack #" and "link seq #" fields of a short
237 * message header to hold the destination node for the message, since the
238 * normal "dest node" field isn't present. This cache is only referenced
239 * when required, so populating the cache of a longer message header is
240 * harmless (as long as the header has the two link sequence fields present).
241 *
242 * Note: Host byte order is OK here, since the info never goes off-card.
243 */
244
245static inline u32 msg_destnode_cache(struct tipc_msg *m)
246{
247 return m->hdr[2];
248}
249
250static inline void msg_set_destnode_cache(struct tipc_msg *m, u32 dnode)
251{
252 m->hdr[2] = dnode;
253}
227 254
228/* 255/*
229 * Words 3-10 256 * Words 3-10