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tipc: Add monitoring of number of nodes discovered by bearer

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Augments TIPC's discovery object to track the number of neighboring nodes
having an active link to the associated bearer.

This means tipc_disc_update_link_req() becomes either one of:

       tipc_disc_add_dest()
or:
       tipc_disc_remove_dest()

depending on the code flow direction of things.

Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
This commit is contained in:
Allan Stephens 2011-04-21 19:05:25 -05:00 committed by Paul Gortmaker
parent 691a620759
commit 1209966cd5
3 changed files with 31 additions and 8 deletions
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4
net/tipc/bearer.c
View file

@ -344,15 +344,15 @@ struct sk_buff *tipc_bearer_get_names(void)
void tipc_bearer_add_dest(struct tipc_bearer *b_ptr, u32 dest)
{
tipc_nmap_add(&b_ptr->nodes, dest);
tipc_disc_update_link_req(b_ptr->link_req);
tipc_bcbearer_sort();
tipc_disc_add_dest(b_ptr->link_req);
}
void tipc_bearer_remove_dest(struct tipc_bearer *b_ptr, u32 dest)
{
tipc_nmap_remove(&b_ptr->nodes, dest);
tipc_disc_update_link_req(b_ptr->link_req);
tipc_bcbearer_sort();
tipc_disc_remove_dest(b_ptr->link_req);
}
/*

32
net/tipc/discover.c
View file

@ -53,6 +53,7 @@
* @bearer: bearer issuing requests
* @dest: destination address for request messages
* @domain: network domain to which links can be established
* @num_nodes: number of nodes currently discovered (i.e. with an active link)
* @buf: request message to be (repeatedly) sent
* @timer: timer governing period between requests
* @timer_intv: current interval between requests (in ms)
@ -61,6 +62,7 @@ struct link_req {
struct tipc_bearer *bearer;
struct tipc_media_addr dest;
u32 domain;
int num_nodes;
struct sk_buff *buf;
struct timer_list timer;
unsigned int timer_intv;
@ -216,15 +218,12 @@ void tipc_disc_recv_msg(struct sk_buff *buf, struct tipc_bearer *b_ptr)
}
/**
* tipc_disc_update_link_req - update frequency of periodic link setup requests
* disc_update - update frequency of periodic link setup requests
* @req: ptr to link request structure
*/
void tipc_disc_update_link_req(struct link_req *req)
static void disc_update(struct link_req *req)
{
if (!req)
return;
if (req->timer_intv == TIPC_LINK_REQ_SLOW) {
if (!req->bearer->nodes.count) {
req->timer_intv = TIPC_LINK_REQ_FAST;
@ -240,6 +239,28 @@ void tipc_disc_update_link_req(struct link_req *req)
}
}
/**
* tipc_disc_add_dest - increment set of discovered nodes
* @req: ptr to link request structure
*/
void tipc_disc_add_dest(struct link_req *req)
{
req->num_nodes++;
disc_update(req);
}
/**
* tipc_disc_remove_dest - decrement set of discovered nodes
* @req: ptr to link request structure
*/
void tipc_disc_remove_dest(struct link_req *req)
{
req->num_nodes--;
disc_update(req);
}
/**
* disc_send_msg - send link setup request message
* @req: ptr to link request structure
@ -307,6 +328,7 @@ int tipc_disc_create(struct tipc_bearer *b_ptr,
memcpy(&req->dest, dest, sizeof(*dest));
req->bearer = b_ptr;
req->domain = dest_domain;
req->num_nodes = 0;
req->timer_intv = TIPC_LINK_REQ_INIT;
k_init_timer(&req->timer, (Handler)disc_timeout, (unsigned long)req);
k_start_timer(&req->timer, req->timer_intv);

3
net/tipc/discover.h
View file

@ -42,7 +42,8 @@ struct link_req;
int tipc_disc_create(struct tipc_bearer *b_ptr, struct tipc_media_addr *dest,
u32 dest_domain);
void tipc_disc_delete(struct link_req *req);
void tipc_disc_update_link_req(struct link_req *req);
void tipc_disc_add_dest(struct link_req *req);
void tipc_disc_remove_dest(struct link_req *req);
void tipc_disc_recv_msg(struct sk_buff *buf, struct tipc_bearer *b_ptr);
#endif