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-rw-r--r--net/tipc/core.h20
-rw-r--r--net/tipc/link.c37
-rw-r--r--net/tipc/link.h41
-rw-r--r--net/tipc/msg.h17
4 files changed, 53 insertions, 62 deletions
diff --git a/net/tipc/core.h b/net/tipc/core.h
index 53e8146..0fcf133 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -109,6 +109,26 @@ struct tipc_net {
atomic_t subscription_count;
};
+static inline u16 mod(u16 x)
+{
+ return x & 0xffffu;
+}
+
+static inline int less_eq(u16 left, u16 right)
+{
+ return mod(right - left) < 32768u;
+}
+
+static inline int more(u16 left, u16 right)
+{
+ return !less_eq(left, right);
+}
+
+static inline int less(u16 left, u16 right)
+{
+ return less_eq(left, right) && (mod(right) != mod(left));
+}
+
#ifdef CONFIG_SYSCTL
int tipc_register_sysctl(void);
void tipc_unregister_sysctl(void);
diff --git a/net/tipc/link.c b/net/tipc/link.c
index d71e83d0..391a96f 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -685,9 +685,9 @@ int __tipc_link_xmit(struct net *net, struct tipc_link *link,
unsigned int maxwin = link->window;
unsigned int imp = msg_importance(msg);
uint mtu = link->mtu;
- uint ack = mod(link->next_in_no - 1);
- uint seqno = link->next_out_no;
- uint bc_last_in = link->owner->bclink.last_in;
+ u16 ack = mod(link->next_in_no - 1);
+ u16 seqno = link->next_out_no;
+ u16 bc_last_in = link->owner->bclink.last_in;
struct tipc_media_addr *addr = &link->media_addr;
struct sk_buff_head *transmq = &link->transmq;
struct sk_buff_head *backlogq = &link->backlogq;
@@ -859,7 +859,7 @@ void tipc_link_push_packets(struct tipc_link *link)
{
struct sk_buff *skb;
struct tipc_msg *msg;
- unsigned int ack = mod(link->next_in_no - 1);
+ u16 ack = mod(link->next_in_no - 1);
while (skb_queue_len(&link->transmq) < link->window) {
skb = __skb_dequeue(&link->backlogq);
@@ -998,13 +998,13 @@ synched:
static void link_retrieve_defq(struct tipc_link *link,
struct sk_buff_head *list)
{
- u32 seq_no;
+ u16 seq_no;
if (skb_queue_empty(&link->deferdq))
return;
seq_no = buf_seqno(skb_peek(&link->deferdq));
- if (seq_no == mod(link->next_in_no))
+ if (seq_no == link->next_in_no)
skb_queue_splice_tail_init(&link->deferdq, list);
}
@@ -1025,8 +1025,8 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr)
struct tipc_link *l_ptr;
struct sk_buff *skb1, *tmp;
struct tipc_msg *msg;
- u32 seq_no;
- u32 ackd;
+ u16 seq_no;
+ u16 ackd;
u32 released;
skb2list(skb, &head);
@@ -1119,7 +1119,7 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr)
}
/* Link is now in state WORKING_WORKING */
- if (unlikely(seq_no != mod(l_ptr->next_in_no))) {
+ if (unlikely(seq_no != l_ptr->next_in_no)) {
link_handle_out_of_seq_msg(l_ptr, skb);
link_retrieve_defq(l_ptr, &head);
skb = NULL;
@@ -1250,7 +1250,7 @@ static void tipc_link_input(struct tipc_link *link, struct sk_buff *skb)
u32 tipc_link_defer_pkt(struct sk_buff_head *list, struct sk_buff *skb)
{
struct sk_buff *skb1;
- u32 seq_no = buf_seqno(skb);
+ u16 seq_no = buf_seqno(skb);
/* Empty queue ? */
if (skb_queue_empty(list)) {
@@ -1266,7 +1266,7 @@ u32 tipc_link_defer_pkt(struct sk_buff_head *list, struct sk_buff *skb)
/* Locate insertion point in queue, then insert; discard if duplicate */
skb_queue_walk(list, skb1) {
- u32 curr_seqno = buf_seqno(skb1);
+ u16 curr_seqno = buf_seqno(skb1);
if (seq_no == curr_seqno) {
kfree_skb(skb);
@@ -1301,7 +1301,7 @@ static void link_handle_out_of_seq_msg(struct tipc_link *l_ptr,
* Discard packet if a duplicate; otherwise add it to deferred queue
* and notify peer of gap as per protocol specification
*/
- if (less(seq_no, mod(l_ptr->next_in_no))) {
+ if (less(seq_no, l_ptr->next_in_no)) {
l_ptr->stats.duplicates++;
kfree_skb(buf);
return;
@@ -1326,6 +1326,7 @@ void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int probe_msg,
struct tipc_msg *msg = l_ptr->pmsg;
u32 msg_size = sizeof(l_ptr->proto_msg);
int r_flag;
+ u16 last_rcv;
/* Don't send protocol message during link failover */
if (l_ptr->flags & LINK_FAILINGOVER)
@@ -1342,7 +1343,7 @@ void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int probe_msg,
msg_set_last_bcast(msg, tipc_bclink_get_last_sent(l_ptr->owner->net));
if (msg_typ == STATE_MSG) {
- u32 next_sent = mod(l_ptr->next_out_no);
+ u16 next_sent = l_ptr->next_out_no;
if (!tipc_link_is_up(l_ptr))
return;
@@ -1350,8 +1351,8 @@ void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int probe_msg,
next_sent = buf_seqno(skb_peek(&l_ptr->backlogq));
msg_set_next_sent(msg, next_sent);
if (!skb_queue_empty(&l_ptr->deferdq)) {
- u32 rec = buf_seqno(skb_peek(&l_ptr->deferdq));
- gap = mod(rec - mod(l_ptr->next_in_no));
+ last_rcv = buf_seqno(skb_peek(&l_ptr->deferdq));
+ gap = mod(last_rcv - l_ptr->next_in_no);
}
msg_set_seq_gap(msg, gap);
if (gap)
@@ -1485,10 +1486,8 @@ static void tipc_link_proto_rcv(struct tipc_link *l_ptr,
if (link_reset_unknown(l_ptr))
break;
- if (less_eq(mod(l_ptr->next_in_no), msg_next_sent(msg))) {
- rec_gap = mod(msg_next_sent(msg) -
- mod(l_ptr->next_in_no));
- }
+ if (less_eq(l_ptr->next_in_no, msg_next_sent(msg)))
+ rec_gap = mod(msg_next_sent(msg) - l_ptr->next_in_no);
if (msg_probe(msg))
l_ptr->stats.recv_probes++;
diff --git a/net/tipc/link.h b/net/tipc/link.h
index dc27bb6..a65770b 100644
--- a/net/tipc/link.h
+++ b/net/tipc/link.h
@@ -151,7 +151,7 @@ struct tipc_link {
/* Management and link supervision data */
unsigned int flags;
- u32 checkpoint;
+ u16 checkpoint;
u32 peer_session;
u32 peer_bearer_id;
u32 bearer_id;
@@ -185,13 +185,13 @@ struct tipc_link {
u16 len;
u16 limit;
} backlog[5];
- u32 next_out_no;
+ u16 next_out_no;
+ u16 last_retransmitted;
u32 window;
- u32 last_retransmitted;
u32 stale_count;
/* Reception */
- u32 next_in_no;
+ u16 next_in_no;
u32 rcv_unacked;
struct sk_buff_head deferdq;
struct sk_buff_head inputq;
@@ -245,39 +245,6 @@ int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_parse_link_prop(struct nlattr *prop, struct nlattr *props[]);
void link_prepare_wakeup(struct tipc_link *l);
-/*
- * 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;
-}
-
-static inline int less_eq(u32 left, u32 right)
-{
- return mod(right - left) < 32768u;
-}
-
-static inline int more(u32 left, u32 right)
-{
- return !less_eq(left, right);
-}
-
-static inline int less(u32 left, u32 right)
-{
- return less_eq(left, right) && (mod(right) != mod(left));
-}
-
-static inline u32 lesser(u32 left, u32 right)
-{
- return less_eq(left, right) ? left : right;
-}
-
static inline u32 link_own_addr(struct tipc_link *l)
{
return msg_prevnode(l->pmsg);
diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index e1d3595e..6ca2366 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -313,12 +313,12 @@ static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
msg_set_bits(m, 1, 19, 0x3, n);
}
-static inline u32 msg_bcast_ack(struct tipc_msg *m)
+static inline u16 msg_bcast_ack(struct tipc_msg *m)
{
return msg_bits(m, 1, 0, 0xffff);
}
-static inline void msg_set_bcast_ack(struct tipc_msg *m, u32 n)
+static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
{
msg_set_bits(m, 1, 0, 0xffff, n);
}
@@ -327,22 +327,22 @@ static inline void msg_set_bcast_ack(struct tipc_msg *m, u32 n)
/*
* Word 2
*/
-static inline u32 msg_ack(struct tipc_msg *m)
+static inline u16 msg_ack(struct tipc_msg *m)
{
return msg_bits(m, 2, 16, 0xffff);
}
-static inline void msg_set_ack(struct tipc_msg *m, u32 n)
+static inline void msg_set_ack(struct tipc_msg *m, u16 n)
{
msg_set_bits(m, 2, 16, 0xffff, n);
}
-static inline u32 msg_seqno(struct tipc_msg *m)
+static inline u16 msg_seqno(struct tipc_msg *m)
{
return msg_bits(m, 2, 0, 0xffff);
}
-static inline void msg_set_seqno(struct tipc_msg *m, u32 n)
+static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
{
msg_set_bits(m, 2, 0, 0xffff, n);
}
@@ -782,6 +782,11 @@ bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, u32 *dnode,
int *err);
struct sk_buff *tipc_msg_reassemble(struct sk_buff_head *list);
+static inline u16 buf_seqno(struct sk_buff *skb)
+{
+ return msg_seqno(buf_msg(skb));
+}
+
/* tipc_skb_peek(): peek and reserve first buffer in list
* @list: list to be peeked in
* Returns pointer to first buffer in list, if any
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