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WSL2-Linux-Kernel
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tipc: split link outqueue 

struct tipc_link contains one single queue for outgoing packets,
where both transmitted and waiting packets are queued.

This infrastructure is hard to maintain, because we need
to keep a number of fields to keep track of which packets are
sent or unsent, and the number of packets in each category.

A lot of code becomes simpler if we split this queue into a transmission
queue, where sent/unacknowledged packets are kept, and a backlog queue,
where we keep the not yet sent packets.

In this commit we do this separation.

Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Paul Maloy 2015-03-13 16:08:10 -04:00 коммит произвёл David S. Miller
Родитель 2cdf3918e4
Коммит 05dcc5aa4d
7 изменённых файлов: 149 добавлений и 166 удалений
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48
net/tipc/bcast.c
Просмотреть файл

@ -135,9 +135,10 @@ static void bclink_set_last_sent(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_link *bcl = tn->bcl;
struct sk_buff *skb = skb_peek(&bcl->backlogq);
if (bcl->next_out)
bcl->fsm_msg_cnt = mod(buf_seqno(bcl->next_out) - 1);
if (skb)
bcl->fsm_msg_cnt = mod(buf_seqno(skb) - 1);
else
bcl->fsm_msg_cnt = mod(bcl->next_out_no - 1);
}
@ -180,7 +181,7 @@ static void bclink_retransmit_pkt(struct tipc_net *tn, u32 after, u32 to)
struct sk_buff *skb;
struct tipc_link *bcl = tn->bcl;
skb_queue_walk(&bcl->outqueue, skb) {
skb_queue_walk(&bcl->transmq, skb) {
if (more(buf_seqno(skb), after)) {
tipc_link_retransmit(bcl, skb, mod(to - after));
break;
@ -210,7 +211,6 @@ void tipc_bclink_wakeup_users(struct net *net)
void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
{
struct sk_buff *skb, *tmp;
struct sk_buff *next;
unsigned int released = 0;
struct net *net = n_ptr->net;
struct tipc_net *tn = net_generic(net, tipc_net_id);
@ -221,7 +221,7 @@ void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
tipc_bclink_lock(net);
/* Bail out if tx queue is empty (no clean up is required) */
skb = skb_peek(&tn->bcl->outqueue);
skb = skb_peek(&tn->bcl->transmq);
if (!skb)
goto exit;
@ -248,27 +248,19 @@ void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
}
/* Skip over packets that node has previously acknowledged */
skb_queue_walk(&tn->bcl->outqueue, skb) {
skb_queue_walk(&tn->bcl->transmq, skb) {
if (more(buf_seqno(skb), n_ptr->bclink.acked))
break;
}
/* Update packets that node is now acknowledging */
skb_queue_walk_from_safe(&tn->bcl->outqueue, skb, tmp) {
skb_queue_walk_from_safe(&tn->bcl->transmq, skb, tmp) {
if (more(buf_seqno(skb), acked))
break;
next = tipc_skb_queue_next(&tn->bcl->outqueue, skb);
if (skb != tn->bcl->next_out) {
bcbuf_decr_acks(skb);
} else {
bcbuf_set_acks(skb, 0);
tn->bcl->next_out = next;
bclink_set_last_sent(net);
}
bcbuf_decr_acks(skb);
bclink_set_last_sent(net);
if (bcbuf_acks(skb) == 0) {
__skb_unlink(skb, &tn->bcl->outqueue);
__skb_unlink(skb, &tn->bcl->transmq);
kfree_skb(skb);
released = 1;
}
@ -276,7 +268,7 @@ void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
n_ptr->bclink.acked = acked;
/* Try resolving broadcast link congestion, if necessary */
if (unlikely(tn->bcl->next_out)) {
if (unlikely(skb_peek(&tn->bcl->backlogq))) {
tipc_link_push_packets(tn->bcl);
bclink_set_last_sent(net);
}
@ -323,7 +315,7 @@ void tipc_bclink_update_link_state(struct tipc_node *n_ptr,
buf = tipc_buf_acquire(INT_H_SIZE);
if (buf) {
struct tipc_msg *msg = buf_msg(buf);
struct sk_buff *skb = skb_peek(&n_ptr->bclink.deferred_queue);
struct sk_buff *skb = skb_peek(&n_ptr->bclink.deferdq);
u32 to = skb ? buf_seqno(skb) - 1 : n_ptr->bclink.last_sent;
tipc_msg_init(tn->own_addr, msg, BCAST_PROTOCOL, STATE_MSG,
@ -398,7 +390,7 @@ int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list)
if (likely(bclink->bcast_nodes.count)) {
rc = __tipc_link_xmit(net, bcl, list);
if (likely(!rc)) {
u32 len = skb_queue_len(&bcl->outqueue);
u32 len = skb_queue_len(&bcl->transmq);
bclink_set_last_sent(net);
bcl->stats.queue_sz_counts++;
@ -563,25 +555,25 @@ receive:
if (node->bclink.last_in == node->bclink.last_sent)
goto unlock;
if (skb_queue_empty(&node->bclink.deferred_queue)) {
if (skb_queue_empty(&node->bclink.deferdq)) {
node->bclink.oos_state = 1;
goto unlock;
}
msg = buf_msg(skb_peek(&node->bclink.deferred_queue));
msg = buf_msg(skb_peek(&node->bclink.deferdq));
seqno = msg_seqno(msg);
next_in = mod(next_in + 1);
if (seqno != next_in)
goto unlock;
/* Take in-sequence message from deferred queue & deliver it */
buf = __skb_dequeue(&node->bclink.deferred_queue);
buf = __skb_dequeue(&node->bclink.deferdq);
goto receive;
}
/* Handle out-of-sequence broadcast message */
if (less(next_in, seqno)) {
deferred = tipc_link_defer_pkt(&node->bclink.deferred_queue,
deferred = tipc_link_defer_pkt(&node->bclink.deferdq,
buf);
bclink_update_last_sent(node, seqno);
buf = NULL;
@ -638,7 +630,6 @@ static int tipc_bcbearer_send(struct net *net, struct sk_buff *buf,
msg_set_non_seq(msg, 1);
msg_set_mc_netid(msg, tn->net_id);
tn->bcl->stats.sent_info++;
if (WARN_ON(!bclink->bcast_nodes.count)) {
dump_stack();
return 0;
@ -917,8 +908,9 @@ int tipc_bclink_init(struct net *net)
sprintf(bcbearer->media.name, "tipc-broadcast");
spin_lock_init(&bclink->lock);
__skb_queue_head_init(&bcl->outqueue);
__skb_queue_head_init(&bcl->deferred_queue);
__skb_queue_head_init(&bcl->transmq);
__skb_queue_head_init(&bcl->backlogq);
__skb_queue_head_init(&bcl->deferdq);
skb_queue_head_init(&bcl->wakeupq);
bcl->next_out_no = 1;
spin_lock_init(&bclink->node.lock);

206
net/tipc/link.c
Просмотреть файл

@ -194,10 +194,10 @@ static void link_timeout(unsigned long data)
tipc_node_lock(l_ptr->owner);
/* update counters used in statistical profiling of send traffic */
l_ptr->stats.accu_queue_sz += skb_queue_len(&l_ptr->outqueue);
l_ptr->stats.accu_queue_sz += skb_queue_len(&l_ptr->transmq);
l_ptr->stats.queue_sz_counts++;
skb = skb_peek(&l_ptr->outqueue);
skb = skb_peek(&l_ptr->transmq);
if (skb) {
struct tipc_msg *msg = buf_msg(skb);
u32 length = msg_size(msg);
@ -229,7 +229,7 @@ static void link_timeout(unsigned long data)
/* do all other link processing performed on a periodic basis */
link_state_event(l_ptr, TIMEOUT_EVT);
if (l_ptr->next_out)
if (skb_queue_len(&l_ptr->backlogq))
tipc_link_push_packets(l_ptr);
tipc_node_unlock(l_ptr->owner);
@ -313,8 +313,9 @@ struct tipc_link *tipc_link_create(struct tipc_node *n_ptr,
link_init_max_pkt(l_ptr);
l_ptr->next_out_no = 1;
__skb_queue_head_init(&l_ptr->outqueue);
__skb_queue_head_init(&l_ptr->deferred_queue);
__skb_queue_head_init(&l_ptr->transmq);
__skb_queue_head_init(&l_ptr->backlogq);
__skb_queue_head_init(&l_ptr->deferdq);
skb_queue_head_init(&l_ptr->wakeupq);
skb_queue_head_init(&l_ptr->inputq);
skb_queue_head_init(&l_ptr->namedq);
@ -400,7 +401,7 @@ static bool link_schedule_user(struct tipc_link *link, u32 oport,
*/
void link_prepare_wakeup(struct tipc_link *link)
{
uint pend_qsz = skb_queue_len(&link->outqueue);
uint pend_qsz = skb_queue_len(&link->backlogq);
struct sk_buff *skb, *tmp;
skb_queue_walk_safe(&link->wakeupq, skb, tmp) {
@ -430,8 +431,9 @@ void tipc_link_reset_fragments(struct tipc_link *l_ptr)
*/
void tipc_link_purge_queues(struct tipc_link *l_ptr)
{
__skb_queue_purge(&l_ptr->deferred_queue);
__skb_queue_purge(&l_ptr->outqueue);
__skb_queue_purge(&l_ptr->deferdq);
__skb_queue_purge(&l_ptr->transmq);
__skb_queue_purge(&l_ptr->backlogq);
tipc_link_reset_fragments(l_ptr);
}
@ -464,15 +466,15 @@ void tipc_link_reset(struct tipc_link *l_ptr)
}
/* Clean up all queues, except inputq: */
__skb_queue_purge(&l_ptr->outqueue);
__skb_queue_purge(&l_ptr->deferred_queue);
__skb_queue_purge(&l_ptr->transmq);
__skb_queue_purge(&l_ptr->backlogq);
__skb_queue_purge(&l_ptr->deferdq);
if (!owner->inputq)
owner->inputq = &l_ptr->inputq;
skb_queue_splice_init(&l_ptr->wakeupq, owner->inputq);
if (!skb_queue_empty(owner->inputq))
owner->action_flags |= TIPC_MSG_EVT;
l_ptr->next_out = NULL;
l_ptr->unacked_window = 0;
l_ptr->rcv_unacked = 0;
l_ptr->checkpoint = 1;
l_ptr->next_out_no = 1;
l_ptr->fsm_msg_cnt = 0;
@ -742,54 +744,51 @@ int __tipc_link_xmit(struct net *net, struct tipc_link *link,
struct sk_buff_head *list)
{
struct tipc_msg *msg = buf_msg(skb_peek(list));
uint psz = msg_size(msg);
uint sndlim = link->queue_limit[0];
unsigned int maxwin = link->window;
uint imp = tipc_msg_tot_importance(msg);
uint mtu = link->max_pkt;
uint ack = mod(link->next_in_no - 1);
uint seqno = link->next_out_no;
uint bc_last_in = link->owner->bclink.last_in;
struct tipc_media_addr *addr = &link->media_addr;
struct sk_buff_head *outqueue = &link->outqueue;
struct sk_buff_head *transmq = &link->transmq;
struct sk_buff_head *backlogq = &link->backlogq;
struct sk_buff *skb, *tmp;
/* Match queue limits against msg importance: */
if (unlikely(skb_queue_len(outqueue) >= link->queue_limit[imp]))
if (unlikely(skb_queue_len(backlogq) >= link->queue_limit[imp]))
return tipc_link_cong(link, list);
/* Has valid packet limit been used ? */
if (unlikely(psz > mtu)) {
if (unlikely(msg_size(msg) > mtu)) {
__skb_queue_purge(list);
return -EMSGSIZE;
}
/* Prepare each packet for sending, and add to outqueue: */
/* Prepare each packet for sending, and add to relevant queue: */
skb_queue_walk_safe(list, skb, tmp) {
__skb_unlink(skb, list);
msg = buf_msg(skb);
msg_set_word(msg, 2, ((ack << 16) | mod(seqno)));
msg_set_seqno(msg, seqno);
msg_set_ack(msg, ack);
msg_set_bcast_ack(msg, bc_last_in);
if (skb_queue_len(outqueue) < sndlim) {
__skb_queue_tail(outqueue, skb);
tipc_bearer_send(net, link->bearer_id,
skb, addr);
link->next_out = NULL;
link->unacked_window = 0;
} else if (tipc_msg_bundle(outqueue, skb, mtu)) {
if (likely(skb_queue_len(transmq) < maxwin)) {
__skb_queue_tail(transmq, skb);
tipc_bearer_send(net, link->bearer_id, skb, addr);
link->rcv_unacked = 0;
seqno++;
continue;
}
if (tipc_msg_bundle(skb_peek_tail(backlogq), skb, mtu)) {
link->stats.sent_bundled++;
continue;
} else if (tipc_msg_make_bundle(outqueue, skb, mtu,
link->addr)) {
}
if (tipc_msg_make_bundle(&skb, mtu, link->addr)) {
link->stats.sent_bundled++;
link->stats.sent_bundles++;
if (!link->next_out)
link->next_out = skb_peek_tail(outqueue);
} else {
__skb_queue_tail(outqueue, skb);
if (!link->next_out)
link->next_out = skb;
}
__skb_queue_tail(backlogq, skb);
seqno++;
}
link->next_out_no = seqno;
@ -895,14 +894,6 @@ static void tipc_link_sync_rcv(struct tipc_node *n, struct sk_buff *buf)
kfree_skb(buf);
}
struct sk_buff *tipc_skb_queue_next(const struct sk_buff_head *list,
const struct sk_buff *skb)
{
if (skb_queue_is_last(list, skb))
return NULL;
return skb->next;
}
/*
* tipc_link_push_packets - push unsent packets to bearer
*
@ -911,30 +902,23 @@ struct sk_buff *tipc_skb_queue_next(const struct sk_buff_head *list,
*
* Called with node locked
*/
void tipc_link_push_packets(struct tipc_link *l_ptr)
void tipc_link_push_packets(struct tipc_link *link)
{
struct sk_buff_head *outqueue = &l_ptr->outqueue;
struct sk_buff *skb = l_ptr->next_out;
struct sk_buff *skb;
struct tipc_msg *msg;
u32 next, first;
unsigned int ack = mod(link->next_in_no - 1);
skb_queue_walk_from(outqueue, skb) {
msg = buf_msg(skb);
next = msg_seqno(msg);
first = buf_seqno(skb_peek(outqueue));
if (mod(next - first) < l_ptr->queue_limit[0]) {
msg_set_ack(msg, mod(l_ptr->next_in_no - 1));
msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in);
if (msg_user(msg) == MSG_BUNDLER)
TIPC_SKB_CB(skb)->bundling = false;
tipc_bearer_send(l_ptr->owner->net,
l_ptr->bearer_id, skb,
&l_ptr->media_addr);
l_ptr->next_out = tipc_skb_queue_next(outqueue, skb);
} else {
while (skb_queue_len(&link->transmq) < link->window) {
skb = __skb_dequeue(&link->backlogq);
if (!skb)
break;
}
msg = buf_msg(skb);
msg_set_ack(msg, ack);
msg_set_bcast_ack(msg, link->owner->bclink.last_in);
link->rcv_unacked = 0;
__skb_queue_tail(&link->transmq, skb);
tipc_bearer_send(link->owner->net, link->bearer_id,
skb, &link->media_addr);
}
}
@ -1021,8 +1005,8 @@ void tipc_link_retransmit(struct tipc_link *l_ptr, struct sk_buff *skb,
l_ptr->stale_count = 1;
}
skb_queue_walk_from(&l_ptr->outqueue, skb) {
if (!retransmits || skb == l_ptr->next_out)
skb_queue_walk_from(&l_ptr->transmq, skb) {
if (!retransmits)
break;
msg = buf_msg(skb);
msg_set_ack(msg, mod(l_ptr->next_in_no - 1));
@ -1039,12 +1023,12 @@ static void link_retrieve_defq(struct tipc_link *link,
{
u32 seq_no;
if (skb_queue_empty(&link->deferred_queue))
if (skb_queue_empty(&link->deferdq))
return;
seq_no = buf_seqno(skb_peek(&link->deferred_queue));
seq_no = buf_seqno(skb_peek(&link->deferdq));
if (seq_no == mod(link->next_in_no))
skb_queue_splice_tail_init(&link->deferred_queue, list);
skb_queue_splice_tail_init(&link->deferdq, list);
}
/**
@ -1121,17 +1105,16 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr)
tipc_bclink_acknowledge(n_ptr, msg_bcast_ack(msg));
released = 0;
skb_queue_walk_safe(&l_ptr->outqueue, skb1, tmp) {
if (skb1 == l_ptr->next_out ||
more(buf_seqno(skb1), ackd))
skb_queue_walk_safe(&l_ptr->transmq, skb1, tmp) {
if (more(buf_seqno(skb1), ackd))
break;
__skb_unlink(skb1, &l_ptr->outqueue);
__skb_unlink(skb1, &l_ptr->transmq);
kfree_skb(skb1);
released = 1;
}
/* Try sending any messages link endpoint has pending */
if (unlikely(l_ptr->next_out))
if (unlikely(skb_queue_len(&l_ptr->backlogq)))
tipc_link_push_packets(l_ptr);
if (released && !skb_queue_empty(&l_ptr->wakeupq))
@ -1166,10 +1149,9 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr)
goto unlock;
}
l_ptr->next_in_no++;
if (unlikely(!skb_queue_empty(&l_ptr->deferred_queue)))
if (unlikely(!skb_queue_empty(&l_ptr->deferdq)))
link_retrieve_defq(l_ptr, &head);
if (unlikely(++l_ptr->unacked_window >= TIPC_MIN_LINK_WIN)) {
if (unlikely(++l_ptr->rcv_unacked >= TIPC_MIN_LINK_WIN)) {
l_ptr->stats.sent_acks++;
tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, 0, 0, 0);
}
@ -1336,9 +1318,9 @@ static void link_handle_out_of_seq_msg(struct tipc_link *l_ptr,
return;
}
if (tipc_link_defer_pkt(&l_ptr->deferred_queue, buf)) {
if (tipc_link_defer_pkt(&l_ptr->deferdq, buf)) {
l_ptr->stats.deferred_recv++;
if ((skb_queue_len(&l_ptr->deferred_queue) % 16) == 1)
if ((skb_queue_len(&l_ptr->deferdq) % TIPC_MIN_LINK_WIN) == 1)
tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, 0, 0, 0);
} else {
l_ptr->stats.duplicates++;
@ -1375,11 +1357,11 @@ void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int probe_msg,
if (!tipc_link_is_up(l_ptr))
return;
if (l_ptr->next_out)
next_sent = buf_seqno(l_ptr->next_out);
if (skb_queue_len(&l_ptr->backlogq))
next_sent = buf_seqno(skb_peek(&l_ptr->backlogq));
msg_set_next_sent(msg, next_sent);
if (!skb_queue_empty(&l_ptr->deferred_queue)) {
u32 rec = buf_seqno(skb_peek(&l_ptr->deferred_queue));
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));
}
msg_set_seq_gap(msg, gap);
@ -1431,10 +1413,9 @@ void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int probe_msg,
skb_copy_to_linear_data(buf, msg, sizeof(l_ptr->proto_msg));
buf->priority = TC_PRIO_CONTROL;
tipc_bearer_send(l_ptr->owner->net, l_ptr->bearer_id, buf,
&l_ptr->media_addr);
l_ptr->unacked_window = 0;
l_ptr->rcv_unacked = 0;
kfree_skb(buf);
}
@ -1569,7 +1550,7 @@ static void tipc_link_proto_rcv(struct tipc_link *l_ptr,
}
if (msg_seq_gap(msg)) {
l_ptr->stats.recv_nacks++;
tipc_link_retransmit(l_ptr, skb_peek(&l_ptr->outqueue),
tipc_link_retransmit(l_ptr, skb_peek(&l_ptr->transmq),
msg_seq_gap(msg));
}
break;
@ -1616,7 +1597,7 @@ static void tipc_link_tunnel_xmit(struct tipc_link *l_ptr,
*/
void tipc_link_failover_send_queue(struct tipc_link *l_ptr)
{
u32 msgcount = skb_queue_len(&l_ptr->outqueue);
int msgcount;
struct tipc_link *tunnel = l_ptr->owner->active_links[0];
struct tipc_msg tunnel_hdr;
struct sk_buff *skb;
@ -1627,10 +1608,12 @@ void tipc_link_failover_send_queue(struct tipc_link *l_ptr)
tipc_msg_init(link_own_addr(l_ptr), &tunnel_hdr, CHANGEOVER_PROTOCOL,
ORIGINAL_MSG, INT_H_SIZE, l_ptr->addr);
skb_queue_splice_tail_init(&l_ptr->backlogq, &l_ptr->transmq);
msgcount = skb_queue_len(&l_ptr->transmq);
msg_set_bearer_id(&tunnel_hdr, l_ptr->peer_bearer_id);
msg_set_msgcnt(&tunnel_hdr, msgcount);
if (skb_queue_empty(&l_ptr->outqueue)) {
if (skb_queue_empty(&l_ptr->transmq)) {
skb = tipc_buf_acquire(INT_H_SIZE);
if (skb) {
skb_copy_to_linear_data(skb, &tunnel_hdr, INT_H_SIZE);
@ -1646,7 +1629,7 @@ void tipc_link_failover_send_queue(struct tipc_link *l_ptr)
split_bundles = (l_ptr->owner->active_links[0] !=
l_ptr->owner->active_links[1]);
skb_queue_walk(&l_ptr->outqueue, skb) {
skb_queue_walk(&l_ptr->transmq, skb) {
struct tipc_msg *msg = buf_msg(skb);
if ((msg_user(msg) == MSG_BUNDLER) && split_bundles) {
@ -1677,39 +1660,46 @@ void tipc_link_failover_send_queue(struct tipc_link *l_ptr)
* and sequence order is preserved per sender/receiver socket pair.
* Owner node is locked.
*/
void tipc_link_dup_queue_xmit(struct tipc_link *l_ptr,
struct tipc_link *tunnel)
void tipc_link_dup_queue_xmit(struct tipc_link *link,
struct tipc_link *tnl)
{
struct sk_buff *skb;
struct tipc_msg tunnel_hdr;
struct tipc_msg tnl_hdr;
struct sk_buff_head *queue = &link->transmq;
int mcnt;
tipc_msg_init(link_own_addr(l_ptr), &tunnel_hdr, CHANGEOVER_PROTOCOL,
DUPLICATE_MSG, INT_H_SIZE, l_ptr->addr);
msg_set_msgcnt(&tunnel_hdr, skb_queue_len(&l_ptr->outqueue));
msg_set_bearer_id(&tunnel_hdr, l_ptr->peer_bearer_id);
skb_queue_walk(&l_ptr->outqueue, skb) {
tipc_msg_init(link_own_addr(link), &tnl_hdr, CHANGEOVER_PROTOCOL,
DUPLICATE_MSG, INT_H_SIZE, link->addr);
mcnt = skb_queue_len(&link->transmq) + skb_queue_len(&link->backlogq);
msg_set_msgcnt(&tnl_hdr, mcnt);
msg_set_bearer_id(&tnl_hdr, link->peer_bearer_id);
tunnel_queue:
skb_queue_walk(queue, skb) {
struct sk_buff *outskb;
struct tipc_msg *msg = buf_msg(skb);
u32 length = msg_size(msg);
u32 len = msg_size(msg);
if (msg_user(msg) == MSG_BUNDLER)
msg_set_type(msg, CLOSED_MSG);
msg_set_ack(msg, mod(l_ptr->next_in_no - 1)); /* Update */
msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in);
msg_set_size(&tunnel_hdr, length + INT_H_SIZE);
outskb = tipc_buf_acquire(length + INT_H_SIZE);
msg_set_ack(msg, mod(link->next_in_no - 1));
msg_set_bcast_ack(msg, link->owner->bclink.last_in);
msg_set_size(&tnl_hdr, len + INT_H_SIZE);
outskb = tipc_buf_acquire(len + INT_H_SIZE);
if (outskb == NULL) {
pr_warn("%sunable to send duplicate msg\n",
link_co_err);
return;
}
skb_copy_to_linear_data(outskb, &tunnel_hdr, INT_H_SIZE);
skb_copy_to_linear_data_offset(outskb, INT_H_SIZE, skb->data,
length);
__tipc_link_xmit_skb(tunnel, outskb);
if (!tipc_link_is_up(l_ptr))
skb_copy_to_linear_data(outskb, &tnl_hdr, INT_H_SIZE);
skb_copy_to_linear_data_offset(outskb, INT_H_SIZE,
skb->data, len);
__tipc_link_xmit_skb(tnl, outskb);
if (!tipc_link_is_up(link))
return;
}
if (queue == &link->backlogq)
return;
queue = &link->backlogq;
goto tunnel_queue;
}
/* tipc_link_dup_rcv(): Receive a tunnelled DUPLICATE_MSG packet.
@ -1823,6 +1813,8 @@ static void link_set_supervision_props(struct tipc_link *l_ptr, u32 tol)
void tipc_link_set_queue_limits(struct tipc_link *l_ptr, u32 window)
{
l_ptr->window = window;
/* Data messages from this node, inclusive FIRST_FRAGM */
l_ptr->queue_limit[TIPC_LOW_IMPORTANCE] = window;
l_ptr->queue_limit[TIPC_MEDIUM_IMPORTANCE] = (window / 3) * 4;

17
net/tipc/link.h
Просмотреть файл

@ -124,7 +124,8 @@ struct tipc_stats {
* @max_pkt: current maximum packet size for this link
* @max_pkt_target: desired maximum packet size for this link
* @max_pkt_probes: # of probes based on current (max_pkt, max_pkt_target)
* @outqueue: outbound message queue
* @transmitq: queue for sent, non-acked messages
* @backlogq: queue for messages waiting to be sent
* @next_out_no: next sequence number to use for outbound messages
* @last_retransmitted: sequence number of most recently retransmitted message
* @stale_count: # of identical retransmit requests made by peer
@ -177,20 +178,21 @@ struct tipc_link {
u32 max_pkt_probes;
/* Sending */
struct sk_buff_head outqueue;
struct sk_buff_head transmq;
struct sk_buff_head backlogq;
u32 next_out_no;
u32 window;
u32 last_retransmitted;
u32 stale_count;
/* Reception */
u32 next_in_no;
struct sk_buff_head deferred_queue;
u32 unacked_window;
u32 rcv_unacked;
struct sk_buff_head deferdq;
struct sk_buff_head inputq;
struct sk_buff_head namedq;
/* Congestion handling */
struct sk_buff *next_out;
struct sk_buff_head wakeupq;
/* Fragmentation/reassembly */
@ -302,9 +304,4 @@ static inline int link_reset_reset(struct tipc_link *l_ptr)
return l_ptr->state == RESET_RESET;
}
static inline int link_congested(struct tipc_link *l_ptr)
{
return skb_queue_len(&l_ptr->outqueue) >= l_ptr->queue_limit[0];
}
#endif

32
net/tipc/msg.c
Просмотреть файл

@ -330,33 +330,36 @@ error:
/**
* tipc_msg_bundle(): Append contents of a buffer to tail of an existing one
* @list: the buffer chain of the existing buffer ("bundle")
* @bskb: the buffer to append to ("bundle")
* @skb: buffer to be appended
* @mtu: max allowable size for the bundle buffer
* Consumes buffer if successful
* Returns true if bundling could be performed, otherwise false
*/
bool tipc_msg_bundle(struct sk_buff_head *list, struct sk_buff *skb, u32 mtu)
bool tipc_msg_bundle(struct sk_buff *bskb, struct sk_buff *skb, u32 mtu)
{
struct sk_buff *bskb = skb_peek_tail(list);
struct tipc_msg *bmsg = buf_msg(bskb);
struct tipc_msg *bmsg;
struct tipc_msg *msg = buf_msg(skb);
unsigned int bsz = msg_size(bmsg);
unsigned int bsz;
unsigned int msz = msg_size(msg);
u32 start = align(bsz);
u32 start, pad;
u32 max = mtu - INT_H_SIZE;
u32 pad = start - bsz;
if (likely(msg_user(msg) == MSG_FRAGMENTER))
return false;
if (!bskb)
return false;
bmsg = buf_msg(bskb);
bsz = msg_size(bmsg);
start = align(bsz);
pad = start - bsz;
if (unlikely(msg_user(msg) == CHANGEOVER_PROTOCOL))
return false;
if (unlikely(msg_user(msg) == BCAST_PROTOCOL))
return false;
if (likely(msg_user(bmsg) != MSG_BUNDLER))
return false;
if (likely(!TIPC_SKB_CB(bskb)->bundling))
return false;
if (unlikely(skb_tailroom(bskb) < (pad + msz)))
return false;
if (unlikely(max < (start + msz)))
@ -419,12 +422,11 @@ none:
* Replaces buffer if successful
* Returns true if success, otherwise false
*/
bool tipc_msg_make_bundle(struct sk_buff_head *list,
struct sk_buff *skb, u32 mtu, u32 dnode)
bool tipc_msg_make_bundle(struct sk_buff **skb, u32 mtu, u32 dnode)
{
struct sk_buff *bskb;
struct tipc_msg *bmsg;
struct tipc_msg *msg = buf_msg(skb);
struct tipc_msg *msg = buf_msg(*skb);
u32 msz = msg_size(msg);
u32 max = mtu - INT_H_SIZE;
@ -448,9 +450,9 @@ bool tipc_msg_make_bundle(struct sk_buff_head *list,
msg_set_seqno(bmsg, msg_seqno(msg));
msg_set_ack(bmsg, msg_ack(msg));
msg_set_bcast_ack(bmsg, msg_bcast_ack(msg));
TIPC_SKB_CB(bskb)->bundling = true;
__skb_queue_tail(list, bskb);
return tipc_msg_bundle(list, skb, mtu);
tipc_msg_bundle(bskb, *skb, mtu);
*skb = bskb;
return true;
}
/**

6
net/tipc/msg.h
Просмотреть файл

@ -767,9 +767,9 @@ struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz,
uint data_sz, u32 dnode, u32 onode,
u32 dport, u32 oport, int errcode);
int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
bool tipc_msg_bundle(struct sk_buff_head *list, struct sk_buff *skb, u32 mtu);
bool tipc_msg_make_bundle(struct sk_buff_head *list,
struct sk_buff *skb, u32 mtu, u32 dnode);
bool tipc_msg_bundle(struct sk_buff *bskb, struct sk_buff *skb, u32 mtu);
bool tipc_msg_make_bundle(struct sk_buff **skb, u32 mtu, u32 dnode);
bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
int offset, int dsz, int mtu, struct sk_buff_head *list);

4
net/tipc/node.c
Просмотреть файл

@ -111,7 +111,7 @@ struct tipc_node *tipc_node_create(struct net *net, u32 addr)
INIT_LIST_HEAD(&n_ptr->list);
INIT_LIST_HEAD(&n_ptr->publ_list);
INIT_LIST_HEAD(&n_ptr->conn_sks);
__skb_queue_head_init(&n_ptr->bclink.deferred_queue);
__skb_queue_head_init(&n_ptr->bclink.deferdq);
hlist_add_head_rcu(&n_ptr->hash, &tn->node_htable[tipc_hashfn(addr)]);
list_for_each_entry_rcu(temp_node, &tn->node_list, list) {
if (n_ptr->addr < temp_node->addr)
@ -354,7 +354,7 @@ static void node_lost_contact(struct tipc_node *n_ptr)
/* Flush broadcast link info associated with lost node */
if (n_ptr->bclink.recv_permitted) {
__skb_queue_purge(&n_ptr->bclink.deferred_queue);
__skb_queue_purge(&n_ptr->bclink.deferdq);
if (n_ptr->bclink.reasm_buf) {
kfree_skb(n_ptr->bclink.reasm_buf);

2
net/tipc/node.h
Просмотреть файл

@ -84,7 +84,7 @@ struct tipc_node_bclink {
u32 last_sent;
u32 oos_state;
u32 deferred_size;
struct sk_buff_head deferred_queue;
struct sk_buff_head deferdq;
struct sk_buff *reasm_buf;
int inputq_map;
bool recv_permitted;