diff options
| -rw-r--r-- | net/tipc/node.c | 25 | ||||
| -rw-r--r-- | net/tipc/node.h | 17 |
2 files changed, 38 insertions, 4 deletions
diff --git a/net/tipc/node.c b/net/tipc/node.c index 5b44c3041be4..d959343043fd 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -1,7 +1,7 @@ /* * net/tipc/node.c: TIPC node management routines * - * Copyright (c) 2000-2006, 2012 Ericsson AB + * Copyright (c) 2000-2006, 2012-2014, Ericsson AB * Copyright (c) 2005-2006, 2010-2014, Wind River Systems * All rights reserved. * @@ -155,21 +155,25 @@ void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr) if (!active[0]) { active[0] = active[1] = l_ptr; node_established_contact(n_ptr); - return; + goto exit; } if (l_ptr->priority < active[0]->priority) { pr_info("New link <%s> becomes standby\n", l_ptr->name); - return; + goto exit; } tipc_link_dup_queue_xmit(active[0], l_ptr); if (l_ptr->priority == active[0]->priority) { active[0] = l_ptr; - return; + goto exit; } pr_info("Old link <%s> becomes standby\n", active[0]->name); if (active[1] != active[0]) pr_info("Old link <%s> becomes standby\n", active[1]->name); active[0] = active[1] = l_ptr; +exit: + /* Leave room for changeover header when returning 'mtu' to users: */ + n_ptr->act_mtus[0] = active[0]->max_pkt - INT_H_SIZE; + n_ptr->act_mtus[1] = active[1]->max_pkt - INT_H_SIZE; } /** @@ -229,6 +233,19 @@ void tipc_node_link_down(struct tipc_node *n_ptr, struct tipc_link *l_ptr) tipc_link_failover_send_queue(l_ptr); else node_lost_contact(n_ptr); + + /* Leave room for changeover header when returning 'mtu' to users: */ + if (active[0]) { + n_ptr->act_mtus[0] = active[0]->max_pkt - INT_H_SIZE; + n_ptr->act_mtus[1] = active[1]->max_pkt - INT_H_SIZE; + return; + } + + /* Loopback link went down? No fragmentation needed from now on. */ + if (n_ptr->addr == tipc_own_addr) { + n_ptr->act_mtus[0] = MAX_MSG_SIZE; + n_ptr->act_mtus[1] = MAX_MSG_SIZE; + } } int tipc_node_active_links(struct tipc_node *n_ptr) diff --git a/net/tipc/node.h b/net/tipc/node.h index 9087063793f2..b61716a8218e 100644 --- a/net/tipc/node.h +++ b/net/tipc/node.h @@ -41,6 +41,7 @@ #include "addr.h" #include "net.h" #include "bearer.h" +#include "msg.h" /* * Out-of-range value for node signature @@ -105,6 +106,7 @@ struct tipc_node { spinlock_t lock; struct hlist_node hash; struct tipc_link *active_links[2]; + u32 act_mtus[2]; struct tipc_link *links[MAX_BEARERS]; unsigned int action_flags; struct tipc_node_bclink bclink; @@ -143,4 +145,19 @@ static inline bool tipc_node_blocked(struct tipc_node *node) TIPC_NOTIFY_NODE_DOWN | TIPC_WAIT_OWN_LINKS_DOWN)); } +static inline uint tipc_node_get_mtu(u32 addr, u32 selector) +{ + struct tipc_node *node; + u32 mtu; + + node = tipc_node_find(addr); + + if (likely(node)) + mtu = node->act_mtus[selector & 1]; + else + mtu = MAX_MSG_SIZE; + + return mtu; +} + #endif |