diff options
Diffstat (limited to 'net/tipc/discover.c')
| -rw-r--r-- | net/tipc/discover.c | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/net/tipc/discover.c b/net/tipc/discover.c index ecc758c6eacf..412ff41b8611 100644 --- a/net/tipc/discover.c +++ b/net/tipc/discover.c @@ -50,6 +50,7 @@ * @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) + * @lock: spinlock for controlling access to requests * @buf: request message to be (repeatedly) sent * @timer: timer governing period between requests * @timer_intv: current interval between requests (in ms) @@ -59,6 +60,7 @@ struct tipc_link_req { struct tipc_media_addr dest; u32 domain; int num_nodes; + spinlock_t lock; struct sk_buff *buf; struct timer_list timer; unsigned int timer_intv; @@ -239,7 +241,7 @@ void tipc_disc_recv_msg(struct sk_buff *buf, struct tipc_bearer *b_ptr) /* Accept discovery message & send response, if necessary */ link_fully_up = link_working_working(link); - if ((type == DSC_REQ_MSG) && !link_fully_up && !b_ptr->blocked) { + if ((type == DSC_REQ_MSG) && !link_fully_up) { rbuf = tipc_disc_init_msg(DSC_RESP_MSG, orig, b_ptr); if (rbuf) { tipc_bearer_send(b_ptr, rbuf, &media_addr); @@ -274,7 +276,9 @@ static void disc_update(struct tipc_link_req *req) */ void tipc_disc_add_dest(struct tipc_link_req *req) { + spin_lock_bh(&req->lock); req->num_nodes++; + spin_unlock_bh(&req->lock); } /** @@ -283,18 +287,10 @@ void tipc_disc_add_dest(struct tipc_link_req *req) */ void tipc_disc_remove_dest(struct tipc_link_req *req) { + spin_lock_bh(&req->lock); req->num_nodes--; disc_update(req); -} - -/** - * disc_send_msg - send link setup request message - * @req: ptr to link request structure - */ -static void disc_send_msg(struct tipc_link_req *req) -{ - if (!req->bearer->blocked) - tipc_bearer_send(req->bearer, req->buf, &req->dest); + spin_unlock_bh(&req->lock); } /** @@ -307,7 +303,7 @@ static void disc_timeout(struct tipc_link_req *req) { int max_delay; - spin_lock_bh(&req->bearer->lock); + spin_lock_bh(&req->lock); /* Stop searching if only desired node has been found */ if (tipc_node(req->domain) && req->num_nodes) { @@ -322,7 +318,8 @@ static void disc_timeout(struct tipc_link_req *req) * hold at fast polling rate if don't have any associated nodes, * otherwise hold at slow polling rate */ - disc_send_msg(req); + tipc_bearer_send(req->bearer, req->buf, &req->dest); + req->timer_intv *= 2; if (req->num_nodes) @@ -334,7 +331,7 @@ static void disc_timeout(struct tipc_link_req *req) k_start_timer(&req->timer, req->timer_intv); exit: - spin_unlock_bh(&req->bearer->lock); + spin_unlock_bh(&req->lock); } /** @@ -365,10 +362,11 @@ int tipc_disc_create(struct tipc_bearer *b_ptr, struct tipc_media_addr *dest, req->domain = dest_domain; req->num_nodes = 0; req->timer_intv = TIPC_LINK_REQ_INIT; + spin_lock_init(&req->lock); k_init_timer(&req->timer, (Handler)disc_timeout, (unsigned long)req); k_start_timer(&req->timer, req->timer_intv); b_ptr->link_req = req; - disc_send_msg(req); + tipc_bearer_send(req->bearer, req->buf, &req->dest); return 0; } |