X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=net%2Ftipc%2Fbcast.c;h=b1ff16aa4bdb1a3acb0c39f0be6fe30cad2064bb;hb=e27772b48df91a954a74b1411b57d83b945a58c7;hp=730c5c47ed8d4b67b465caba2dc9768d514e3f87;hpb=4c1ac1b49122b805adfa4efc620592f68dccf5db;p=linux-2.6 diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index 730c5c47ed..b1ff16aa4b 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -1,6 +1,6 @@ /* * net/tipc/bcast.c: TIPC broadcast code - * + * * Copyright (c) 2004-2006, Ericsson AB * Copyright (c) 2004, Intel Corporation. * Copyright (c) 2005, Wind River Systems @@ -59,15 +59,15 @@ * Loss rate for incoming broadcast frames; used to test retransmission code. * Set to N to cause every N'th frame to be discarded; 0 => don't discard any. */ - + #define TIPC_BCAST_LOSS_RATE 0 /** * struct bcbearer_pair - a pair of bearers used by broadcast link * @primary: pointer to primary bearer * @secondary: pointer to secondary bearer - * - * Bearers must have same priority and same set of reachable destinations + * + * Bearers must have same priority and same set of reachable destinations * to be paired. */ @@ -84,7 +84,7 @@ struct bcbearer_pair { * @bpairs_temp: temporary array of bearer pairs used by tipc_bcbearer_sort() * @remains: temporary node map used by tipc_bcbearer_send() * @remains_new: temporary node map used tipc_bcbearer_send() - * + * * Note: The fields labelled "temporary" are incorporated into the bearer * to avoid consuming potentially limited stack space through the use of * large local variables within multicast routines. Concurrent access is @@ -104,7 +104,7 @@ struct bcbearer { * struct bclink - link used for broadcast messages * @link: (non-standard) broadcast link structure * @node: (non-standard) node structure representing b'cast link's peer node - * + * * Handles sequence numbering, fragmentation, bundling, etc. */ @@ -125,7 +125,7 @@ char tipc_bclink_name[] = "multicast-link"; static u32 buf_seqno(struct sk_buff *buf) { return msg_seqno(buf_msg(buf)); -} +} static u32 bcbuf_acks(struct sk_buff *buf) { @@ -143,9 +143,9 @@ static void bcbuf_decr_acks(struct sk_buff *buf) } -/** +/** * bclink_set_gap - set gap according to contents of current deferred pkt queue - * + * * Called with 'node' locked, bc_lock unlocked */ @@ -159,14 +159,14 @@ static void bclink_set_gap(struct node *n_ptr) n_ptr->bclink.gap_to = mod(buf_seqno(buf) - 1); } -/** +/** * bclink_ack_allowed - test if ACK or NACK message can be sent at this moment - * + * * This mechanism endeavours to prevent all nodes in network from trying * to ACK or NACK at the same time. - * + * * Note: TIPC uses a different trigger to distribute ACKs than it does to - * distribute NACKs, but tries to use the same spacing (divide by 16). + * distribute NACKs, but tries to use the same spacing (divide by 16). */ static int bclink_ack_allowed(u32 n) @@ -175,11 +175,11 @@ static int bclink_ack_allowed(u32 n) } -/** +/** * bclink_retransmit_pkt - retransmit broadcast packets * @after: sequence number of last packet to *not* retransmit * @to: sequence number of last packet to retransmit - * + * * Called with bc_lock locked */ @@ -189,16 +189,16 @@ static void bclink_retransmit_pkt(u32 after, u32 to) buf = bcl->first_out; while (buf && less_eq(buf_seqno(buf), after)) { - buf = buf->next; + buf = buf->next; } tipc_link_retransmit(bcl, buf, mod(to - after)); } -/** +/** * tipc_bclink_acknowledge - handle acknowledgement of broadcast packets * @n_ptr: node that sent acknowledgement info * @acked: broadcast sequence # that has been acknowledged - * + * * Node is locked, bc_lock unlocked. */ @@ -244,9 +244,9 @@ void tipc_bclink_acknowledge(struct node *n_ptr, u32 acked) spin_unlock_bh(&bc_lock); } -/** +/** * bclink_send_ack - unicast an ACK msg - * + * * tipc_net_lock and node lock set */ @@ -258,9 +258,9 @@ static void bclink_send_ack(struct node *n_ptr) tipc_link_send_proto_msg(l_ptr, STATE_MSG, 0, 0, 0, 0, 0); } -/** +/** * bclink_send_nack- broadcast a NACK msg - * + * * tipc_net_lock and node lock set */ @@ -276,9 +276,9 @@ static void bclink_send_nack(struct node *n_ptr) if (buf) { msg = buf_msg(buf); msg_init(msg, BCAST_PROTOCOL, STATE_MSG, - TIPC_OK, INT_H_SIZE, n_ptr->addr); + INT_H_SIZE, n_ptr->addr); msg_set_mc_netid(msg, tipc_net_id); - msg_set_bcast_ack(msg, mod(n_ptr->bclink.last_in)); + msg_set_bcast_ack(msg, mod(n_ptr->bclink.last_in)); msg_set_bcgap_after(msg, n_ptr->bclink.gap_after); msg_set_bcgap_to(msg, n_ptr->bclink.gap_to); msg_set_bcast_tag(msg, tipc_own_tag); @@ -292,17 +292,17 @@ static void bclink_send_nack(struct node *n_ptr) bcl->stats.bearer_congs++; } - /* + /* * Ensure we doesn't send another NACK msg to the node * until 16 more deferred messages arrive from it * (i.e. helps prevent all nodes from NACK'ing at same time) */ - + n_ptr->bclink.nack_sync = tipc_own_tag; } } -/** +/** * tipc_bclink_check_gap - send a NACK if a sequence gap exists * * tipc_net_lock and node lock set @@ -320,9 +320,9 @@ void tipc_bclink_check_gap(struct node *n_ptr, u32 last_sent) bclink_send_nack(n_ptr); } -/** +/** * tipc_bclink_peek_nack - process a NACK msg meant for another node - * + * * Only tipc_net_lock set. */ @@ -349,7 +349,7 @@ static void tipc_bclink_peek_nack(u32 dest, u32 sender_tag, u32 gap_after, u32 g if (less_eq(my_to, gap_to)) n_ptr->bclink.gap_to = gap_after; } else { - /* + /* * Expand gap if missing bufs not in deferred queue: */ struct sk_buff *buf = n_ptr->bclink.deferred_head; @@ -371,7 +371,7 @@ static void tipc_bclink_peek_nack(u32 dest, u32 sender_tag, u32 gap_after, u32 g } /* * Some nodes may send a complementary NACK now: - */ + */ if (bclink_ack_allowed(sender_tag + 1)) { if (n_ptr->bclink.gap_to != n_ptr->bclink.gap_after) { bclink_send_nack(n_ptr); @@ -408,7 +408,7 @@ int tipc_bclink_send_msg(struct sk_buff *buf) /** * tipc_bclink_recv_pkt - receive a broadcast packet, and deliver upwards - * + * * tipc_net_lock is read_locked, no other locks set */ @@ -425,7 +425,7 @@ void tipc_bclink_recv_pkt(struct sk_buff *buf) msg_dbg(msg, "bclink.supported || + if (unlikely(!node || !tipc_node_is_up(node) || !node->bclink.supported || (msg_mc_netid(msg) != tipc_net_id))) { buf_discard(buf); return; @@ -443,7 +443,7 @@ void tipc_bclink_recv_pkt(struct sk_buff *buf) bclink_retransmit_pkt(msg_bcgap_after(msg), msg_bcgap_to(msg)); bcl->owner->next = NULL; - spin_unlock_bh(&bc_lock); + spin_unlock_bh(&bc_lock); } else { tipc_bclink_peek_nack(msg_destnode(msg), msg_bcast_tag(msg), @@ -547,10 +547,10 @@ u32 tipc_bclink_acks_missing(struct node *n_ptr) /** * tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer - * + * * Send through as many bearers as necessary to reach all nodes * that support TIPC multicasting. - * + * * Returns 0 if packet sent successfully, non-zero if not */ @@ -571,7 +571,7 @@ static int tipc_bcbearer_send(struct sk_buff *buf, assert(tipc_cltr_bcast_nodes.count != 0); bcbuf_set_acks(buf, tipc_cltr_bcast_nodes.count); msg = buf_msg(buf); - msg_set_non_seq(msg); + msg_set_non_seq(msg, 1); msg_set_mc_netid(msg, tipc_net_id); } @@ -581,7 +581,7 @@ static int tipc_bcbearer_send(struct sk_buff *buf, send_count = 0; /* Send buffer over bearers until all targets reached */ - + bcbearer->remains = tipc_cltr_bcast_nodes; for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) { @@ -611,16 +611,16 @@ swap: bcbearer->bpairs[bp_index].secondary = p; update: if (bcbearer->remains_new.count == 0) - return TIPC_OK; + return 0; bcbearer->remains = bcbearer->remains_new; } - + /* Unable to reach all targets */ bcbearer->bearer.publ.blocked = 1; bcl->stats.bearer_congs++; - return ~TIPC_OK; + return 1; } /** @@ -682,7 +682,7 @@ void tipc_bcbearer_sort(void) /** * tipc_bcbearer_push - resolve bearer congestion - * + * * Forces bclink to push out any unsent packets, until all packets are gone * or congestion reoccurs. * No locks set when function called @@ -714,27 +714,27 @@ int tipc_bclink_stats(char *buf, const u32 buf_size) spin_lock_bh(&bc_lock); tipc_printf(&pb, "Link <%s>\n" - " Window:%u packets\n", + " Window:%u packets\n", bcl->name, bcl->queue_limit[0]); - tipc_printf(&pb, " RX packets:%u fragments:%u/%u bundles:%u/%u\n", + tipc_printf(&pb, " RX packets:%u fragments:%u/%u bundles:%u/%u\n", bcl->stats.recv_info, bcl->stats.recv_fragments, bcl->stats.recv_fragmented, bcl->stats.recv_bundles, bcl->stats.recv_bundled); - tipc_printf(&pb, " TX packets:%u fragments:%u/%u bundles:%u/%u\n", + tipc_printf(&pb, " TX packets:%u fragments:%u/%u bundles:%u/%u\n", bcl->stats.sent_info, bcl->stats.sent_fragments, - bcl->stats.sent_fragmented, + bcl->stats.sent_fragmented, bcl->stats.sent_bundles, bcl->stats.sent_bundled); - tipc_printf(&pb, " RX naks:%u defs:%u dups:%u\n", + tipc_printf(&pb, " RX naks:%u defs:%u dups:%u\n", bcl->stats.recv_nacks, - bcl->stats.deferred_recv, + bcl->stats.deferred_recv, bcl->stats.duplicates); - tipc_printf(&pb, " TX naks:%u acks:%u dups:%u\n", - bcl->stats.sent_nacks, - bcl->stats.sent_acks, + tipc_printf(&pb, " TX naks:%u acks:%u dups:%u\n", + bcl->stats.sent_nacks, + bcl->stats.sent_acks, bcl->stats.retransmitted); tipc_printf(&pb, " Congestion bearer:%u link:%u Send queue max:%u avg:%u\n", bcl->stats.bearer_congs, @@ -756,7 +756,7 @@ int tipc_bclink_reset_stats(void) spin_lock_bh(&bc_lock); memset(&bcl->stats, 0, sizeof(bcl->stats)); spin_unlock_bh(&bc_lock); - return TIPC_OK; + return 0; } int tipc_bclink_set_queue_limits(u32 limit) @@ -769,7 +769,7 @@ int tipc_bclink_set_queue_limits(u32 limit) spin_lock_bh(&bc_lock); tipc_link_set_queue_limits(bcl, limit); spin_unlock_bh(&bc_lock); - return TIPC_OK; + return 0; } int tipc_bclink_init(void) @@ -778,7 +778,7 @@ int tipc_bclink_init(void) bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC); if (!bcbearer || !bclink) { nomem: - warn("Multicast link creation failed, no memory\n"); + warn("Multicast link creation failed, no memory\n"); kfree(bcbearer); bcbearer = NULL; kfree(bclink); @@ -796,7 +796,7 @@ int tipc_bclink_init(void) bcl->next_out_no = 1; spin_lock_init(&bclink->node.lock); bcl->owner = &bclink->node; - bcl->max_pkt = MAX_PKT_DEFAULT_MCAST; + bcl->max_pkt = MAX_PKT_DEFAULT_MCAST; tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT); bcl->b_ptr = &bcbearer->bearer; bcl->state = WORKING_WORKING; @@ -810,7 +810,7 @@ int tipc_bclink_init(void) tipc_printbuf_init(&bcl->print_buf, pb, BCLINK_LOG_BUF_SIZE); } - return TIPC_OK; + return 0; } void tipc_bclink_stop(void)