From 323019069e8d96d87e9dba51f897060f94999821 Mon Sep 17 00:00:00 2001 From: Jon Paul Maloy Date: Thu, 22 Oct 2015 08:51:37 -0400 Subject: tipc: use explicit allocation of broadcast send link The broadcast link instance (struct tipc_link) used for sending is currently aggregated into struct tipc_bclink. This means that we cannot use the regular tipc_link_create() function for initiating the link, but do instead have to initiate numerous fields directly from the bcast_init() function. We want to reduce dependencies between the broadcast functionality and the inner workings of tipc_link. In this commit, we introduce a new function tipc_bclink_create() to link.c, and allocate the instance of the link separately using this function. Signed-off-by: Jon Maloy Reviewed-by: Ying Xue Signed-off-by: David S. Miller --- net/tipc/bcast.c | 89 +++++++++++++++++++++++++++++--------------------------- 1 file changed, 46 insertions(+), 43 deletions(-) (limited to 'net/tipc/bcast.c') diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index c6f0d1dbfc3c..3b7bd2174330 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -98,10 +98,11 @@ struct tipc_bcbearer { * Handles sequence numbering, fragmentation, bundling, etc. */ struct tipc_bc_base { - struct tipc_link link; + struct tipc_link *link; struct tipc_node node; struct sk_buff_head arrvq; struct sk_buff_head inputq; + struct sk_buff_head namedq; struct tipc_node_map bcast_nodes; struct tipc_node *retransmit_to; }; @@ -180,7 +181,7 @@ void tipc_bclink_remove_node(struct net *net, u32 addr) /* Last node? => reset backlog queue */ if (!tn->bcbase->bcast_nodes.count) - tipc_link_purge_backlog(&tn->bcbase->link); + tipc_link_purge_backlog(tn->bcbase->link); tipc_bclink_unlock(net); } @@ -1010,55 +1011,56 @@ int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]) int tipc_bcast_init(struct net *net) { - struct tipc_net *tn = net_generic(net, tipc_net_id); - struct tipc_bcbearer *bcbearer; - struct tipc_bc_base *bclink; - struct tipc_link *bcl; - - bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC); - if (!bcbearer) - return -ENOMEM; - - bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC); - if (!bclink) { - kfree(bcbearer); - return -ENOMEM; - } - - bcl = &bclink->link; - bcbearer->bearer.media = &bcbearer->media; - bcbearer->media.send_msg = tipc_bcbearer_send; - sprintf(bcbearer->media.name, "tipc-broadcast"); - + struct tipc_net *tn = tipc_net(net); + struct tipc_bcbearer *bcb = NULL; + struct tipc_bc_base *bb = NULL; + struct tipc_link *l = NULL; + + bcb = kzalloc(sizeof(*bcb), GFP_ATOMIC); + if (!bcb) + goto enomem; + tn->bcbearer = bcb; + + bcb->bearer.window = BCLINK_WIN_DEFAULT; + bcb->bearer.mtu = MAX_PKT_DEFAULT_MCAST; + bcb->bearer.identity = MAX_BEARERS; + + bcb->bearer.media = &bcb->media; + bcb->media.send_msg = tipc_bcbearer_send; + sprintf(bcb->media.name, "tipc-broadcast"); + strcpy(bcb->bearer.name, bcb->media.name); + + bb = kzalloc(sizeof(*bb), GFP_ATOMIC); + if (!bb) + goto enomem; + tn->bcbase = bb; + __skb_queue_head_init(&bb->arrvq); spin_lock_init(&tipc_net(net)->bclock); - __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->snd_nxt = 1; - spin_lock_init(&bclink->node.lock); - __skb_queue_head_init(&bclink->arrvq); - skb_queue_head_init(&bclink->inputq); - bcl->owner = &bclink->node; - bcl->owner->net = net; - bcl->mtu = MAX_PKT_DEFAULT_MCAST; - tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT); - bcl->bearer_id = MAX_BEARERS; - rcu_assign_pointer(tn->bearer_list[MAX_BEARERS], &bcbearer->bearer); - bcl->pmsg = (struct tipc_msg *)&bcl->proto_msg; - - strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME); - tn->bcbearer = bcbearer; - tn->bcbase = bclink; - tn->bcl = bcl; + bb->node.net = net; + + if (!tipc_link_bc_create(&bb->node, + MAX_PKT_DEFAULT_MCAST, + BCLINK_WIN_DEFAULT, + &bb->inputq, + &bb->namedq, + &l)) + goto enomem; + bb->link = l; + tn->bcl = l; + rcu_assign_pointer(tn->bearer_list[MAX_BEARERS], &bcb->bearer); return 0; +enomem: + kfree(bcb); + kfree(bb); + kfree(l); + return -ENOMEM; } void tipc_bcast_reinit(struct net *net) { struct tipc_bc_base *b = tipc_bc_base(net); - msg_set_prevnode(b->link.pmsg, tipc_own_addr(net)); + msg_set_prevnode(b->link->pmsg, tipc_own_addr(net)); } void tipc_bcast_stop(struct net *net) @@ -1072,6 +1074,7 @@ void tipc_bcast_stop(struct net *net) synchronize_net(); kfree(tn->bcbearer); kfree(tn->bcbase); + kfree(tn->bcl); } /** -- cgit