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tipc: let broadcast transmission use new link transmit function

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This commit simplifies the broadcast link transmission function, by
leveraging previous changes to the link transmission function and the
broadcast transmission link life cycle.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Paul Maloy 2015-10-22 08:51:39 -04:00 committed by David S. Miller
parent c1ab3f1dea
commit 2f56612457
5 changed files with 85 additions and 57 deletions
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98
net/tipc/bcast.c
View File

@ -112,6 +112,11 @@ static struct tipc_bc_base *tipc_bc_base(struct net *net)
return tipc_net(net)->bcbase;
}
static struct tipc_link *tipc_bc_sndlink(struct net *net)
{
return tipc_net(net)->bcl;
}
/**
* tipc_nmap_equal - test for equality of node maps
*/
@ -121,6 +126,7 @@ static int tipc_nmap_equal(struct tipc_node_map *nm_a,
return !memcmp(nm_a, nm_b, sizeof(*nm_a));
}
static void tipc_bcbearer_xmit(struct net *net, struct sk_buff_head *xmitq);
static void tipc_nmap_diff(struct tipc_node_map *nm_a,
struct tipc_node_map *nm_b,
struct tipc_node_map *nm_diff);
@ -148,14 +154,14 @@ uint tipc_bcast_get_mtu(void)
return MAX_PKT_DEFAULT_MCAST;
}
static u32 bcbuf_acks(struct sk_buff *buf)
static u16 bcbuf_acks(struct sk_buff *skb)
{
return (u32)(unsigned long)TIPC_SKB_CB(buf)->handle;
return TIPC_SKB_CB(skb)->ackers;
}
static void bcbuf_set_acks(struct sk_buff *buf, u32 acks)
static void bcbuf_set_acks(struct sk_buff *buf, u16 ackers)
{
TIPC_SKB_CB(buf)->handle = (void *)(unsigned long)acks;
TIPC_SKB_CB(buf)->ackers = ackers;
}
static void bcbuf_decr_acks(struct sk_buff *buf)
@ -166,9 +172,10 @@ static void bcbuf_decr_acks(struct sk_buff *buf)
void tipc_bclink_add_node(struct net *net, u32 addr)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_link *l = tipc_bc_sndlink(net);
tipc_bclink_lock(net);
tipc_nmap_add(&tn->bcbase->bcast_nodes, addr);
tipc_link_add_bc_peer(l);
tipc_bclink_unlock(net);
}
@ -178,6 +185,7 @@ void tipc_bclink_remove_node(struct net *net, u32 addr)
tipc_bclink_lock(net);
tipc_nmap_remove(&tn->bcbase->bcast_nodes, addr);
tn->bcl->ackers--;
/* Last node? => reset backlog queue */
if (!tn->bcbase->bcast_nodes.count)
@ -295,7 +303,6 @@ void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
if (unlikely(!n_ptr->bclink.recv_permitted))
return;
tipc_bclink_lock(net);
/* Bail out if tx queue is empty (no clean up is required) */
@ -324,13 +331,11 @@ void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
less_eq(acked, n_ptr->bclink.acked))
goto exit;
}
/* Skip over packets that node has previously acknowledged */
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->transmq, skb, tmp) {
if (more(buf_seqno(skb), acked))
@ -367,6 +372,7 @@ void tipc_bclink_update_link_state(struct tipc_node *n_ptr,
struct sk_buff *buf;
struct net *net = n_ptr->net;
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_link *bcl = tn->bcl;
/* Ignore "stale" link state info */
if (less_eq(last_sent, n_ptr->bclink.last_in))
@ -375,6 +381,10 @@ void tipc_bclink_update_link_state(struct tipc_node *n_ptr,
/* Update link synchronization state; quit if in sync */
bclink_update_last_sent(n_ptr, last_sent);
/* This is a good location for statistical profiling */
bcl->stats.queue_sz_counts++;
bcl->stats.accu_queue_sz += skb_queue_len(&bcl->transmq);
if (n_ptr->bclink.last_sent == n_ptr->bclink.last_in)
return;
@ -468,52 +478,35 @@ static void bclink_peek_nack(struct net *net, struct tipc_msg *msg)
*/
int tipc_bcast_xmit(struct net *net, struct sk_buff_head *list)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_link *bcl = tn->bcl;
struct tipc_bc_base *bclink = tn->bcbase;
struct tipc_link *l = tipc_bc_sndlink(net);
struct sk_buff_head xmitq, inputq, rcvq;
int rc = 0;
int bc = 0;
struct sk_buff *skb;
struct sk_buff_head arrvq;
struct sk_buff_head inputq;
/* Prepare clone of message for local node */
skb = tipc_msg_reassemble(list);
if (unlikely(!skb))
__skb_queue_head_init(&rcvq);
__skb_queue_head_init(&xmitq);
skb_queue_head_init(&inputq);
/* Prepare message clone for local node */
if (unlikely(!tipc_msg_reassemble(list, &rcvq)))
return -EHOSTUNREACH;
/* Broadcast to all nodes */
if (likely(bclink)) {
tipc_bclink_lock(net);
if (likely(bclink->bcast_nodes.count)) {
rc = __tipc_link_xmit(net, bcl, list);
if (likely(!rc)) {
u32 len = skb_queue_len(&bcl->transmq);
bclink_set_last_sent(net);
bcl->stats.queue_sz_counts++;
bcl->stats.accu_queue_sz += len;
}
bc = 1;
}
tipc_bclink_unlock(net);
}
if (unlikely(!bc))
__skb_queue_purge(list);
tipc_bcast_lock(net);
if (tipc_link_bc_peers(l))
rc = tipc_link_xmit(l, list, &xmitq);
bclink_set_last_sent(net);
tipc_bcast_unlock(net);
/* Don't send to local node if adding to link failed */
if (unlikely(rc)) {
kfree_skb(skb);
__skb_queue_purge(&rcvq);
return rc;
}
/* Deliver message clone */
__skb_queue_head_init(&arrvq);
skb_queue_head_init(&inputq);
__skb_queue_tail(&arrvq, skb);
tipc_sk_mcast_rcv(net, &arrvq, &inputq);
return rc;
/* Broadcast to all nodes, inluding local node */
tipc_bcbearer_xmit(net, &xmitq);
tipc_sk_mcast_rcv(net, &rcvq, &inputq);
__skb_queue_purge(list);
return 0;
}
/**
* bclink_accept_pkt - accept an incoming, in-sequence broadcast packet
*
@ -564,7 +557,6 @@ void tipc_bclink_rcv(struct net *net, struct sk_buff *buf)
node = tipc_node_find(net, msg_prevnode(msg));
if (unlikely(!node))
goto exit;
tipc_node_lock(node);
if (unlikely(!node->bclink.recv_permitted))
goto unlock;
@ -589,7 +581,6 @@ void tipc_bclink_rcv(struct net *net, struct sk_buff *buf)
tipc_node_put(node);
goto exit;
}
/* Handle in-sequence broadcast message */
seqno = msg_seqno(msg);
next_in = mod(node->bclink.last_in + 1);
@ -778,6 +769,19 @@ static int tipc_bcbearer_send(struct net *net, struct sk_buff *buf,
return 0;
}
static void tipc_bcbearer_xmit(struct net *net, struct sk_buff_head *xmitq)
{
struct sk_buff *skb, *tmp;
skb_queue_walk_safe(xmitq, skb, tmp) {
__skb_dequeue(xmitq);
tipc_bcbearer_send(net, skb, NULL, NULL);
/* Until we remove cloning in tipc_l2_send_msg(): */
kfree_skb(skb);
}
}
/**
* tipc_bcbearer_sort - create sets of bearer pairs used by broadcast bearer
*/

19
net/tipc/link.c
View File

@ -158,6 +158,21 @@ int tipc_link_is_active(struct tipc_link *l)
return (node_active_link(n, 0) == l) || (node_active_link(n, 1) == l);
}
void tipc_link_add_bc_peer(struct tipc_link *l)
{
l->ackers++;
}
void tipc_link_remove_bc_peer(struct tipc_link *l)
{
l->ackers--;
}
int tipc_link_bc_peers(struct tipc_link *l)
{
return l->ackers;
}
static u32 link_own_addr(struct tipc_link *l)
{
return msg_prevnode(l->pmsg);
@ -258,6 +273,7 @@ bool tipc_link_bc_create(struct tipc_node *n, int mtu, int window,
l = *link;
strcpy(l->name, tipc_bclink_name);
tipc_link_reset(l);
l->ackers = 0;
return true;
}
@ -898,8 +914,7 @@ static void link_retransmit_failure(struct tipc_link *l_ptr,
char addr_string[16];
pr_info("Msg seq number: %u, ", msg_seqno(msg));
pr_cont("Outstanding acks: %lu\n",
(unsigned long) TIPC_SKB_CB(buf)->handle);
pr_cont("Outstanding acks: %u\n", TIPC_SKB_CB(buf)->ackers);
n_ptr = tipc_bclink_retransmit_to(net);

4
net/tipc/link.h
View File

@ -262,5 +262,9 @@ int tipc_nl_parse_link_prop(struct nlattr *prop, struct nlattr *props[]);
int tipc_link_timeout(struct tipc_link *l, struct sk_buff_head *xmitq);
int tipc_link_rcv(struct tipc_link *l, struct sk_buff *skb,
struct sk_buff_head *xmitq);
void tipc_link_build_ack_msg(struct tipc_link *l, struct sk_buff_head *xmitq);
void tipc_link_add_bc_peer(struct tipc_link *l);
void tipc_link_remove_bc_peer(struct tipc_link *l);
int tipc_link_bc_peers(struct tipc_link *l);
#endif

19
net/tipc/msg.c
View File

@ -565,18 +565,22 @@ bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err)
/* tipc_msg_reassemble() - clone a buffer chain of fragments and
* reassemble the clones into one message
*/
struct sk_buff *tipc_msg_reassemble(struct sk_buff_head *list)
bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq)
{
struct sk_buff *skb;
struct sk_buff *skb, *_skb;
struct sk_buff *frag = NULL;
struct sk_buff *head = NULL;
int hdr_sz;
int hdr_len;
/* Copy header if single buffer */
if (skb_queue_len(list) == 1) {
skb = skb_peek(list);
hdr_sz = skb_headroom(skb) + msg_hdr_sz(buf_msg(skb));
return __pskb_copy(skb, hdr_sz, GFP_ATOMIC);
hdr_len = skb_headroom(skb) + msg_hdr_sz(buf_msg(skb));
_skb = __pskb_copy(skb, hdr_len, GFP_ATOMIC);
if (!_skb)
return false;
__skb_queue_tail(rcvq, _skb);
return true;
}
/* Clone all fragments and reassemble */
@ -590,11 +594,12 @@ struct sk_buff *tipc_msg_reassemble(struct sk_buff_head *list)
if (!head)
goto error;
}
return frag;
__skb_queue_tail(rcvq, frag);
return true;
error:
pr_warn("Failed do clone local mcast rcv buffer\n");
kfree_skb(head);
return NULL;
return false;
}
/* tipc_skb_queue_sorted(); sort pkt into list according to sequence number

2
net/tipc/msg.h
View File

@ -790,7 +790,7 @@ 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);
bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
struct sk_buff *tipc_msg_reassemble(struct sk_buff_head *list);
bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
struct sk_buff *skb);