diff options
| -rw-r--r-- | net/tipc/node.c | 106 | ||||
| -rw-r--r-- | net/tipc/node.h | 26 |
2 files changed, 59 insertions, 73 deletions
diff --git a/net/tipc/node.c b/net/tipc/node.c index 20ec61c..1972964 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -142,6 +142,8 @@ struct tipc_node *tipc_node_create(struct net *net, u32 addr) list_add_tail_rcu(&n_ptr->list, &temp_node->list); n_ptr->action_flags = TIPC_WAIT_PEER_LINKS_DOWN; n_ptr->signature = INVALID_NODE_SIG; + n_ptr->active_links[0] = INVALID_BEARER_ID; + n_ptr->active_links[1] = INVALID_BEARER_ID; tipc_node_get(n_ptr); exit: spin_unlock_bh(&tn->node_list_lock); @@ -227,12 +229,13 @@ void tipc_node_remove_conn(struct net *net, u32 dnode, u32 port) */ void tipc_node_link_up(struct tipc_node *n, int bearer_id) { - struct tipc_link_entry **actv = &n->active_links[0]; - struct tipc_link_entry *le = &n->links[bearer_id]; - struct tipc_link *l = le->link; + int *slot0 = &n->active_links[0]; + int *slot1 = &n->active_links[1]; + struct tipc_link_entry *links = n->links; + struct tipc_link *l = n->links[bearer_id].link; /* Leave room for tunnel header when returning 'mtu' to users: */ - n->links[bearer_id].mtu = l->mtu - INT_H_SIZE; + links[bearer_id].mtu = l->mtu - INT_H_SIZE; n->working_links++; n->action_flags |= TIPC_NOTIFY_LINK_UP; @@ -242,55 +245,30 @@ void tipc_node_link_up(struct tipc_node *n, int bearer_id) l->name, l->net_plane); /* No active links ? => take both active slots */ - if (!actv[0]) { - actv[0] = le; - actv[1] = le; + if (*slot0 < 0) { + *slot0 = bearer_id; + *slot1 = bearer_id; node_established_contact(n); return; } - if (l->priority < actv[0]->link->priority) { + + /* Lower prio than current active ? => no slot */ + if (l->priority < links[*slot0].link->priority) { pr_debug("New link <%s> becomes standby\n", l->name); return; } - tipc_link_dup_queue_xmit(actv[0]->link, l); + tipc_link_dup_queue_xmit(links[*slot0].link, l); - /* Take one active slot if applicable */ - if (l->priority == actv[0]->link->priority) { - actv[0] = le; + /* Same prio as current active ? => take one slot */ + if (l->priority == links[*slot0].link->priority) { + *slot0 = bearer_id; return; } - /* Higher prio than current active? => take both active slots */ - pr_debug("Old l <%s> becomes standby\n", actv[0]->link->name); - if (actv[1] != actv[0]) - pr_debug("Old link <%s> now standby\n", actv[1]->link->name); - actv[0] = le; - actv[1] = le; -} - -/** - * node_select_active_links - select which working links should be active - */ -static void node_select_active_links(struct tipc_node *n) -{ - struct tipc_link_entry **actv = &n->active_links[0]; - struct tipc_link *l; - u32 b, highest = 0; - actv[0] = NULL; - actv[1] = NULL; - - for (b = 0; b < MAX_BEARERS; b++) { - l = n->links[b].link; - if (!l || !tipc_link_is_up(l) || (l->priority < highest)) - continue; - if (l->priority > highest) { - highest = l->priority; - actv[0] = &n->links[b]; - actv[1] = &n->links[b]; - continue; - } - actv[1] = &n->links[b]; - } + /* Higher prio than current active => take both active slots */ + pr_debug("Old link <%s> now standby\n", links[*slot0].link->name); + *slot0 = bearer_id; + *slot1 = bearer_id; } /** @@ -298,32 +276,36 @@ static void node_select_active_links(struct tipc_node *n) */ void tipc_node_link_down(struct tipc_node *n, int bearer_id) { - struct tipc_link_entry **actv = &n->active_links[0]; - struct tipc_link_entry *le = &n->links[bearer_id]; - struct tipc_link *l = le->link; + int *slot0 = &n->active_links[0]; + int *slot1 = &n->active_links[1]; + int i, highest = 0; + struct tipc_link *l, *_l; + l = n->links[bearer_id].link; n->working_links--; n->action_flags |= TIPC_NOTIFY_LINK_DOWN; n->link_id = l->peer_bearer_id << 16 | l->bearer_id; - if (!tipc_link_is_active(l)) { - pr_debug("Lost standby link <%s> on network plane %c\n", - l->name, l->net_plane); - return; - } pr_debug("Lost link <%s> on network plane %c\n", l->name, l->net_plane); - /* Resdistribute active slots if applicable */ - if (actv[0] == le) - actv[0] = actv[1]; - if (actv[1] == le) - actv[1] = actv[0]; - - /* Last link of this priority? => select other ones if available */ - if (actv[0] == le) - node_select_active_links(n); - + /* Select new active link if any available */ + *slot0 = INVALID_BEARER_ID; + *slot1 = INVALID_BEARER_ID; + for (i = 0; i < MAX_BEARERS; i++) { + _l = n->links[i].link; + if (!_l || !tipc_link_is_up(_l)) + continue; + if (_l->priority < highest) + continue; + if (_l->priority > highest) { + highest = _l->priority; + *slot0 = i; + *slot1 = i; + continue; + } + *slot1 = i; + } if (tipc_node_is_up(n)) tipc_link_failover_send_queue(l); else @@ -332,7 +314,7 @@ void tipc_node_link_down(struct tipc_node *n, int bearer_id) bool tipc_node_is_up(struct tipc_node *n) { - return n->active_links[0]; + return n->active_links[0] != INVALID_BEARER_ID; } void tipc_node_check_dest(struct tipc_node *n, struct tipc_bearer *b, diff --git a/net/tipc/node.h b/net/tipc/node.h index 0657cbf..74f278a 100644 --- a/net/tipc/node.h +++ b/net/tipc/node.h @@ -45,6 +45,8 @@ /* Out-of-range value for node signature */ #define INVALID_NODE_SIG 0x10000 +#define INVALID_BEARER_ID -1 + /* Flags used to take different actions according to flag type * TIPC_WAIT_PEER_LINKS_DOWN: wait to see that peer's links are down * TIPC_WAIT_OWN_LINKS_DOWN: wait until peer node is declared down @@ -105,7 +107,7 @@ struct tipc_link_entry { * @hash: links to adjacent nodes in unsorted hash chain * @inputq: pointer to input queue containing messages for msg event * @namedq: pointer to name table input queue with name table messages - * @active_links: pointer into links[] array, identifying which links are active + * @active_links: bearer ids of active links, used as index into links[] array * @links: array containing references to all links to node * @action_flags: bit mask of different types of node actions * @bclink: broadcast-related info @@ -126,7 +128,7 @@ struct tipc_node { struct hlist_node hash; struct sk_buff_head *inputq; struct sk_buff_head *namedq; - struct tipc_link_entry *active_links[2]; + int active_links[2]; struct tipc_link_entry links[MAX_BEARERS]; int action_flags; struct tipc_node_bclink bclink; @@ -176,25 +178,27 @@ static inline bool tipc_node_blocked(struct tipc_node *node) static inline struct tipc_link *node_active_link(struct tipc_node *n, int sel) { - struct tipc_link_entry *le = n->active_links[sel & 1]; + int bearer_id = n->active_links[sel & 1]; + + if (unlikely(bearer_id == INVALID_BEARER_ID)) + return NULL; - if (likely(le)) - return le->link; - return NULL; + return n->links[bearer_id].link; } -static inline uint tipc_node_get_mtu(struct net *net, u32 addr, u32 selector) +static inline unsigned int tipc_node_get_mtu(struct net *net, u32 addr, u32 sel) { struct tipc_node *n; - struct tipc_link_entry *le; + int bearer_id; unsigned int mtu = MAX_MSG_SIZE; n = tipc_node_find(net, addr); if (unlikely(!n)) return mtu; - le = n->active_links[selector & 1]; - if (likely(le)) - mtu = le->mtu; + + bearer_id = n->active_links[sel & 1]; + if (likely(bearer_id != INVALID_BEARER_ID)) + mtu = n->links[bearer_id].mtu; tipc_node_put(n); return mtu; } |
