tipc: Allow use of buf_seqno() helper routine by unicast links

Migrates the buf_seqno() helper routine from broadcast link level to
unicast link level so that it can be used both types of TIPC links.
This is a cosmetic change only, and does not affect the operation of TIPC.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

3 files changed, 24 insertions, 25 deletions

diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 15eb74458748..048b7a3e848e 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -115,11 +115,6 @@ static void tipc_nmap_diff(struct tipc_node_map *nm_a,
                            struct tipc_node_map *nm_b,
                            struct tipc_node_map *nm_diff);
 
-static u32 buf_seqno(struct sk_buff *buf)
-{
-        return msg_seqno(buf_msg(buf));
-}
-
 static u32 bcbuf_acks(struct sk_buff *buf)
 {
         return (u32)(unsigned long)TIPC_SKB_CB(buf)->handle;
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 4eff342326e2..853b286dd08c 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -130,7 +130,7 @@ static void link_init_max_pkt(struct link *l_ptr)
 static u32 link_next_sent(struct link *l_ptr)
 {
         if (l_ptr->next_out)
-                return msg_seqno(buf_msg(l_ptr->next_out));
+                return buf_seqno(l_ptr->next_out);
         return mod(l_ptr->next_out_no);
 }
 
@@ -1354,7 +1354,7 @@ u32 tipc_link_push_packet(struct link *l_ptr)
         if (r_q_size && buf) {
                 u32 last = lesser(mod(r_q_head + r_q_size),
                                   link_last_sent(l_ptr));
-                u32 first = msg_seqno(buf_msg(buf));
+                u32 first = buf_seqno(buf);
 
                 while (buf && less(first, r_q_head)) {
                         first = mod(first + 1);
@@ -1403,7 +1403,7 @@ u32 tipc_link_push_packet(struct link *l_ptr)
         if (buf) {
                 struct tipc_msg *msg = buf_msg(buf);
                 u32 next = msg_seqno(msg);
-                u32 first = msg_seqno(buf_msg(l_ptr->first_out));
+                u32 first = buf_seqno(l_ptr->first_out);
 
                 if (mod(next - first) < l_ptr->queue_limit[0]) {
                         msg_set_ack(msg, mod(l_ptr->next_in_no - 1));
@@ -1558,7 +1558,7 @@ void tipc_link_retransmit(struct link *l_ptr, struct sk_buff *buf,
                 } else {
                         tipc_bearer_schedule(l_ptr->b_ptr, l_ptr);
                         l_ptr->stats.bearer_congs++;
-                        l_ptr->retransm_queue_head = msg_seqno(buf_msg(buf));
+                        l_ptr->retransm_queue_head = buf_seqno(buf);
                         l_ptr->retransm_queue_size = retransmits;
                         return;
                 }
@@ -1579,7 +1579,7 @@ static struct sk_buff *link_insert_deferred_queue(struct link *l_ptr,
         if (l_ptr->oldest_deferred_in == NULL)
                 return buf;
 
-        seq_no = msg_seqno(buf_msg(l_ptr->oldest_deferred_in));
+        seq_no = buf_seqno(l_ptr->oldest_deferred_in);
         if (seq_no == mod(l_ptr->next_in_no)) {
                 l_ptr->newest_deferred_in->next = buf;
                 buf = l_ptr->oldest_deferred_in;
@@ -1738,7 +1738,7 @@ void tipc_recv_msg(struct sk_buff *head, struct tipc_bearer *b_ptr)
 
                 crs = l_ptr->first_out;
                 while ((crs != l_ptr->next_out) &&
-                       less_eq(msg_seqno(buf_msg(crs)), ackd)) {
+                       less_eq(buf_seqno(crs), ackd)) {
                         struct sk_buff *next = crs->next;
 
                         buf_discard(crs);
@@ -1861,7 +1861,7 @@ u32 tipc_link_defer_pkt(struct sk_buff **head,
 {
         struct sk_buff *prev = NULL;
         struct sk_buff *crs = *head;
-        u32 seq_no = msg_seqno(buf_msg(buf));
+        u32 seq_no = buf_seqno(buf);
 
         buf->next = NULL;
 
@@ -1872,7 +1872,7 @@ u32 tipc_link_defer_pkt(struct sk_buff **head,
         }
 
         /* Last ? */
-        if (less(msg_seqno(buf_msg(*tail)), seq_no)) {
+        if (less(buf_seqno(*tail), seq_no)) {
                 (*tail)->next = buf;
                 *tail = buf;
                 return 1;
@@ -1909,7 +1909,7 @@ u32 tipc_link_defer_pkt(struct sk_buff **head,
 static void link_handle_out_of_seq_msg(struct link *l_ptr,
                                        struct sk_buff *buf)
 {
-        u32 seq_no = msg_seqno(buf_msg(buf));
+        u32 seq_no = buf_seqno(buf);
 
         if (likely(msg_user(buf_msg(buf)) == LINK_PROTOCOL)) {
                 link_recv_proto_msg(l_ptr, buf);
@@ -1971,10 +1971,10 @@ void tipc_link_send_proto_msg(struct link *l_ptr, u32 msg_typ, int probe_msg,
                 if (!tipc_link_is_up(l_ptr))
                         return;
                 if (l_ptr->next_out)
-                        next_sent = msg_seqno(buf_msg(l_ptr->next_out));
+                        next_sent = buf_seqno(l_ptr->next_out);
                 msg_set_next_sent(msg, next_sent);
                 if (l_ptr->oldest_deferred_in) {
-                        u32 rec = msg_seqno(buf_msg(l_ptr->oldest_deferred_in));
+                        u32 rec = buf_seqno(l_ptr->oldest_deferred_in);
                         gap = mod(rec - mod(l_ptr->next_in_no));
                 }
                 msg_set_seq_gap(msg, gap);
@@ -2589,7 +2589,7 @@ int tipc_link_recv_fragment(struct sk_buff **pending, struct sk_buff **fb,
 
         /* Is there an incomplete message waiting for this fragment? */
 
-        while (pbuf && ((msg_seqno(buf_msg(pbuf)) != long_msg_seq_no) ||
+        while (pbuf && ((buf_seqno(pbuf) != long_msg_seq_no) ||
                         (msg_orignode(fragm) != msg_orignode(buf_msg(pbuf))))) {
                 prev = pbuf;
                 pbuf = pbuf->next;
@@ -3112,13 +3112,12 @@ static void link_print(struct link *l_ptr, const char *str)
         tipc_printf(buf, "NXI(%u):", mod(l_ptr->next_in_no));
         tipc_printf(buf, "SQUE");
         if (l_ptr->first_out) {
-                tipc_printf(buf, "[%u..", msg_seqno(buf_msg(l_ptr->first_out)));
+                tipc_printf(buf, "[%u..", buf_seqno(l_ptr->first_out));
                 if (l_ptr->next_out)
-                        tipc_printf(buf, "%u..",
-                                    msg_seqno(buf_msg(l_ptr->next_out)));
-                tipc_printf(buf, "%u]", msg_seqno(buf_msg(l_ptr->last_out)));
-                if ((mod(msg_seqno(buf_msg(l_ptr->last_out)) -
-                         msg_seqno(buf_msg(l_ptr->first_out)))
+                        tipc_printf(buf, "%u..", buf_seqno(l_ptr->next_out));
+                tipc_printf(buf, "%u]", buf_seqno(l_ptr->last_out));
+                if ((mod(buf_seqno(l_ptr->last_out) -
+                         buf_seqno(l_ptr->first_out))
                      != (l_ptr->out_queue_size - 1)) ||
                     (l_ptr->last_out->next != NULL)) {
                         tipc_printf(buf, "\nSend queue inconsistency\n");
@@ -3130,8 +3129,8 @@ static void link_print(struct link *l_ptr, const char *str)
                 tipc_printf(buf, "[]");
         tipc_printf(buf, "SQSIZ(%u)", l_ptr->out_queue_size);
         if (l_ptr->oldest_deferred_in) {
-                u32 o = msg_seqno(buf_msg(l_ptr->oldest_deferred_in));
-                u32 n = msg_seqno(buf_msg(l_ptr->newest_deferred_in));
+                u32 o = buf_seqno(l_ptr->oldest_deferred_in);
+                u32 n = buf_seqno(l_ptr->newest_deferred_in);
                 tipc_printf(buf, ":RQUE[%u..%u]", o, n);
                 if (l_ptr->deferred_inqueue_sz != mod((n + 1) - o)) {
                         tipc_printf(buf, ":RQSIZ(%u)",
diff --git a/net/tipc/link.h b/net/tipc/link.h
index 78792399d667..d35b0f3045ea 100644
--- a/net/tipc/link.h
+++ b/net/tipc/link.h
@@ -254,6 +254,11 @@ void tipc_link_retransmit(struct link *l_ptr, struct sk_buff *start, u32 retrans
  * Link sequence number manipulation routines (uses modulo 2**16 arithmetic)
  */
 
+static inline u32 buf_seqno(struct sk_buff *buf)
+{
+        return msg_seqno(buf_msg(buf));
+}
+
 static inline u32 mod(u32 x)
 {
         return x & 0xffffu;