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![Jon Paul Maloy](/assets/img/avatar_default.png)
Until now, we have only been supporting a fix MTU size of 1500 bytes for all broadcast media, irrespective of their actual capability. We now make the broadcast MTU adaptable to the carrying media, i.e., we use the smallest MTU supported by any of the interfaces attached to TIPC. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1326 lines
35 KiB
C
1326 lines
35 KiB
C
/*
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* net/tipc/bcast.c: TIPC broadcast code
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*
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* Copyright (c) 2004-2006, 2014-2015, Ericsson AB
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* Copyright (c) 2004, Intel Corporation.
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* Copyright (c) 2005, 2010-2011, Wind River Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/tipc_config.h>
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#include "socket.h"
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#include "msg.h"
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#include "bcast.h"
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#include "name_distr.h"
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#include "link.h"
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#include "node.h"
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#define MAX_PKT_DEFAULT_MCAST 1500 /* bcast link max packet size (fixed) */
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#define BCLINK_WIN_DEFAULT 50 /* bcast link window size (default) */
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#define BCLINK_WIN_MIN 32 /* bcast minimum link window size */
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const char tipc_bclink_name[] = "broadcast-link";
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/**
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* struct tipc_bcbearer_pair - a pair of bearers used by broadcast link
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* @primary: pointer to primary bearer
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* @secondary: pointer to secondary bearer
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*
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* Bearers must have same priority and same set of reachable destinations
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* to be paired.
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*/
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struct tipc_bcbearer_pair {
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struct tipc_bearer *primary;
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struct tipc_bearer *secondary;
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};
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#define BCBEARER MAX_BEARERS
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/**
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* struct tipc_bcbearer - bearer used by broadcast link
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* @bearer: (non-standard) broadcast bearer structure
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* @media: (non-standard) broadcast media structure
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* @bpairs: array of bearer pairs
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* @bpairs_temp: temporary array of bearer pairs used by tipc_bcbearer_sort()
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* @remains: temporary node map used by tipc_bcbearer_send()
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* @remains_new: temporary node map used tipc_bcbearer_send()
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*
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* Note: The fields labelled "temporary" are incorporated into the bearer
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* to avoid consuming potentially limited stack space through the use of
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* large local variables within multicast routines. Concurrent access is
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* prevented through use of the spinlock "bcast_lock".
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*/
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struct tipc_bcbearer {
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struct tipc_bearer bearer;
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struct tipc_media media;
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struct tipc_bcbearer_pair bpairs[MAX_BEARERS];
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struct tipc_bcbearer_pair bpairs_temp[TIPC_MAX_LINK_PRI + 1];
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struct tipc_node_map remains;
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struct tipc_node_map remains_new;
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};
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/**
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* struct tipc_bc_base - link used for broadcast messages
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* @link: broadcast send link structure
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* @node: (non-standard) node structure representing b'cast link's peer node
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* @bcast_nodes: map of broadcast-capable nodes
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* @retransmit_to: node that most recently requested a retransmit
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* @dest_nnt: array indicating number of reachable destinations per bearer
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* @bearers: array of bearers, sorted by number of reachable destinations
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*
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* Handles sequence numbering, fragmentation, bundling, etc.
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*/
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struct tipc_bc_base {
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struct tipc_link *link;
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struct tipc_node node;
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struct sk_buff_head arrvq;
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struct sk_buff_head inputq;
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struct sk_buff_head namedq;
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int dests[MAX_BEARERS];
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int primary_bearer;
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struct tipc_node_map bcast_nodes;
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struct tipc_node *retransmit_to;
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};
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static struct tipc_bc_base *tipc_bc_base(struct net *net)
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{
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return tipc_net(net)->bcbase;
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}
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/**
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* tipc_nmap_equal - test for equality of node maps
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*/
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static int tipc_nmap_equal(struct tipc_node_map *nm_a,
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struct tipc_node_map *nm_b)
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{
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return !memcmp(nm_a, nm_b, sizeof(*nm_a));
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}
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static void tipc_bcbearer_xmit(struct net *net, struct sk_buff_head *xmitq);
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static void tipc_nmap_diff(struct tipc_node_map *nm_a,
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struct tipc_node_map *nm_b,
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struct tipc_node_map *nm_diff);
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static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node);
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static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node);
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static void tipc_bclink_lock(struct net *net)
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{
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tipc_bcast_lock(net);
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}
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static void tipc_bclink_unlock(struct net *net)
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{
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tipc_bcast_unlock(net);
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}
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void tipc_bclink_input(struct net *net)
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{
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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tipc_sk_mcast_rcv(net, &tn->bcbase->arrvq, &tn->bcbase->inputq);
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}
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int tipc_bcast_get_mtu(struct net *net)
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{
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return tipc_link_mtu(tipc_bc_sndlink(net));
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}
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static u16 bcbuf_acks(struct sk_buff *skb)
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{
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return TIPC_SKB_CB(skb)->ackers;
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}
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static void bcbuf_set_acks(struct sk_buff *buf, u16 ackers)
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{
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TIPC_SKB_CB(buf)->ackers = ackers;
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}
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static void bcbuf_decr_acks(struct sk_buff *buf)
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{
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bcbuf_set_acks(buf, bcbuf_acks(buf) - 1);
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}
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/* tipc_bcbase_select_primary(): find a bearer with links to all destinations,
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* if any, and make it primary bearer
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*/
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static void tipc_bcbase_select_primary(struct net *net)
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{
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struct tipc_bc_base *bb = tipc_bc_base(net);
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int all_dests = tipc_link_bc_peers(bb->link);
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int i, mtu;
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bb->primary_bearer = INVALID_BEARER_ID;
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if (!all_dests)
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return;
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for (i = 0; i < MAX_BEARERS; i++) {
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if (!bb->dests[i])
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continue;
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mtu = tipc_bearer_mtu(net, i);
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if (mtu < tipc_link_mtu(bb->link))
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tipc_link_set_mtu(bb->link, mtu);
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if (bb->dests[i] < all_dests)
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continue;
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bb->primary_bearer = i;
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/* Reduce risk that all nodes select same primary */
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if ((i ^ tipc_own_addr(net)) & 1)
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break;
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}
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}
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void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id)
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{
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struct tipc_bc_base *bb = tipc_bc_base(net);
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tipc_bcast_lock(net);
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bb->dests[bearer_id]++;
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tipc_bcbase_select_primary(net);
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tipc_bcast_unlock(net);
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}
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void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id)
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{
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struct tipc_bc_base *bb = tipc_bc_base(net);
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tipc_bcast_lock(net);
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bb->dests[bearer_id]--;
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tipc_bcbase_select_primary(net);
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tipc_bcast_unlock(net);
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}
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static void bclink_set_last_sent(struct net *net)
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{
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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struct tipc_link *bcl = tn->bcl;
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bcl->silent_intv_cnt = mod(bcl->snd_nxt - 1);
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}
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u32 tipc_bclink_get_last_sent(struct net *net)
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{
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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return tn->bcl->silent_intv_cnt;
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}
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static void bclink_update_last_sent(struct tipc_node *node, u32 seqno)
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{
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node->bclink.last_sent = less_eq(node->bclink.last_sent, seqno) ?
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seqno : node->bclink.last_sent;
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}
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/**
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* tipc_bclink_retransmit_to - get most recent node to request retransmission
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*
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* Called with bclink_lock locked
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*/
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struct tipc_node *tipc_bclink_retransmit_to(struct net *net)
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{
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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return tn->bcbase->retransmit_to;
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}
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/**
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* bclink_retransmit_pkt - retransmit broadcast packets
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* @after: sequence number of last packet to *not* retransmit
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* @to: sequence number of last packet to retransmit
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*
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* Called with bclink_lock locked
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*/
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static void bclink_retransmit_pkt(struct tipc_net *tn, u32 after, u32 to)
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{
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struct sk_buff *skb;
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struct tipc_link *bcl = tn->bcl;
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skb_queue_walk(&bcl->transmq, skb) {
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if (more(buf_seqno(skb), after)) {
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tipc_link_retransmit(bcl, skb, mod(to - after));
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break;
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}
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}
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}
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/**
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* bclink_prepare_wakeup - prepare users for wakeup after congestion
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* @bcl: broadcast link
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* @resultq: queue for users which can be woken up
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* Move a number of waiting users, as permitted by available space in
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* the send queue, from link wait queue to specified queue for wakeup
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*/
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static void bclink_prepare_wakeup(struct tipc_link *bcl, struct sk_buff_head *resultq)
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{
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int pnd[TIPC_SYSTEM_IMPORTANCE + 1] = {0,};
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int imp, lim;
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struct sk_buff *skb, *tmp;
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skb_queue_walk_safe(&bcl->wakeupq, skb, tmp) {
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imp = TIPC_SKB_CB(skb)->chain_imp;
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lim = bcl->window + bcl->backlog[imp].limit;
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pnd[imp] += TIPC_SKB_CB(skb)->chain_sz;
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if ((pnd[imp] + bcl->backlog[imp].len) >= lim)
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continue;
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skb_unlink(skb, &bcl->wakeupq);
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skb_queue_tail(resultq, skb);
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}
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}
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/**
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* tipc_bclink_wakeup_users - wake up pending users
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*
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* Called with no locks taken
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*/
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void tipc_bclink_wakeup_users(struct net *net)
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{
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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struct tipc_link *bcl = tn->bcl;
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struct sk_buff_head resultq;
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skb_queue_head_init(&resultq);
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bclink_prepare_wakeup(bcl, &resultq);
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tipc_sk_rcv(net, &resultq);
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}
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/**
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* tipc_bclink_acknowledge - handle acknowledgement of broadcast packets
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* @n_ptr: node that sent acknowledgement info
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* @acked: broadcast sequence # that has been acknowledged
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*
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* Node is locked, bclink_lock unlocked.
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*/
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void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
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{
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struct sk_buff *skb, *tmp;
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unsigned int released = 0;
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struct net *net = n_ptr->net;
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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if (unlikely(!n_ptr->bclink.recv_permitted))
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return;
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tipc_bclink_lock(net);
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/* Bail out if tx queue is empty (no clean up is required) */
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skb = skb_peek(&tn->bcl->transmq);
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if (!skb)
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goto exit;
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/* Determine which messages need to be acknowledged */
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if (acked == INVALID_LINK_SEQ) {
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/*
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* Contact with specified node has been lost, so need to
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* acknowledge sent messages only (if other nodes still exist)
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* or both sent and unsent messages (otherwise)
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*/
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if (tn->bcbase->bcast_nodes.count)
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acked = tn->bcl->silent_intv_cnt;
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else
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acked = tn->bcl->snd_nxt;
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} else {
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/*
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* Bail out if specified sequence number does not correspond
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* to a message that has been sent and not yet acknowledged
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*/
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if (less(acked, buf_seqno(skb)) ||
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less(tn->bcl->silent_intv_cnt, acked) ||
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less_eq(acked, n_ptr->bclink.acked))
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goto exit;
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}
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/* Skip over packets that node has previously acknowledged */
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skb_queue_walk(&tn->bcl->transmq, skb) {
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if (more(buf_seqno(skb), n_ptr->bclink.acked))
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break;
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}
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/* Update packets that node is now acknowledging */
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skb_queue_walk_from_safe(&tn->bcl->transmq, skb, tmp) {
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if (more(buf_seqno(skb), acked))
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break;
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bcbuf_decr_acks(skb);
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bclink_set_last_sent(net);
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if (bcbuf_acks(skb) == 0) {
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__skb_unlink(skb, &tn->bcl->transmq);
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kfree_skb(skb);
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released = 1;
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}
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}
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n_ptr->bclink.acked = acked;
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/* Try resolving broadcast link congestion, if necessary */
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if (unlikely(skb_peek(&tn->bcl->backlogq))) {
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tipc_link_push_packets(tn->bcl);
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bclink_set_last_sent(net);
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}
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if (unlikely(released && !skb_queue_empty(&tn->bcl->wakeupq)))
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n_ptr->action_flags |= TIPC_WAKEUP_BCAST_USERS;
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exit:
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tipc_bclink_unlock(net);
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}
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/**
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* tipc_bclink_update_link_state - update broadcast link state
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*
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* RCU and node lock set
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*/
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void tipc_bclink_update_link_state(struct tipc_node *n_ptr,
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u32 last_sent)
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{
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struct sk_buff *buf;
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struct net *net = n_ptr->net;
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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struct tipc_link *bcl = tn->bcl;
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/* Ignore "stale" link state info */
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if (less_eq(last_sent, n_ptr->bclink.last_in))
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return;
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|
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/* Update link synchronization state; quit if in sync */
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bclink_update_last_sent(n_ptr, last_sent);
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|
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/* This is a good location for statistical profiling */
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bcl->stats.queue_sz_counts++;
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bcl->stats.accu_queue_sz += skb_queue_len(&bcl->transmq);
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|
|
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if (n_ptr->bclink.last_sent == n_ptr->bclink.last_in)
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return;
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|
|
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/* Update out-of-sync state; quit if loss is still unconfirmed */
|
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if ((++n_ptr->bclink.oos_state) == 1) {
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if (n_ptr->bclink.deferred_size < (TIPC_MIN_LINK_WIN / 2))
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return;
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n_ptr->bclink.oos_state++;
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}
|
|
|
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/* Don't NACK if one has been recently sent (or seen) */
|
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if (n_ptr->bclink.oos_state & 0x1)
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return;
|
|
|
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/* Send NACK */
|
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buf = tipc_buf_acquire(INT_H_SIZE);
|
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if (buf) {
|
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struct tipc_msg *msg = buf_msg(buf);
|
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struct sk_buff *skb = skb_peek(&n_ptr->bclink.deferdq);
|
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u32 to = skb ? buf_seqno(skb) - 1 : n_ptr->bclink.last_sent;
|
|
|
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tipc_msg_init(tn->own_addr, msg, BCAST_PROTOCOL, STATE_MSG,
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INT_H_SIZE, n_ptr->addr);
|
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msg_set_non_seq(msg, 1);
|
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msg_set_mc_netid(msg, tn->net_id);
|
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msg_set_bcast_ack(msg, n_ptr->bclink.last_in);
|
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msg_set_bcgap_after(msg, n_ptr->bclink.last_in);
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msg_set_bcgap_to(msg, to);
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|
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tipc_bclink_lock(net);
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tipc_bearer_send(net, MAX_BEARERS, buf, NULL);
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tn->bcl->stats.sent_nacks++;
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tipc_bclink_unlock(net);
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kfree_skb(buf);
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|
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n_ptr->bclink.oos_state++;
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}
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}
|
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|
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void tipc_bclink_sync_state(struct tipc_node *n, struct tipc_msg *hdr)
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{
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u16 last = msg_last_bcast(hdr);
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int mtyp = msg_type(hdr);
|
|
|
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if (unlikely(msg_user(hdr) != LINK_PROTOCOL))
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return;
|
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if (mtyp == STATE_MSG) {
|
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tipc_bclink_update_link_state(n, last);
|
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return;
|
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}
|
|
/* Compatibility: older nodes don't know BCAST_PROTOCOL synchronization,
|
|
* and transfer synch info in LINK_PROTOCOL messages.
|
|
*/
|
|
if (tipc_node_is_up(n))
|
|
return;
|
|
if ((mtyp != RESET_MSG) && (mtyp != ACTIVATE_MSG))
|
|
return;
|
|
n->bclink.last_sent = last;
|
|
n->bclink.last_in = last;
|
|
n->bclink.oos_state = 0;
|
|
}
|
|
|
|
/**
|
|
* bclink_peek_nack - monitor retransmission requests sent by other nodes
|
|
*
|
|
* Delay any upcoming NACK by this node if another node has already
|
|
* requested the first message this node is going to ask for.
|
|
*/
|
|
static void bclink_peek_nack(struct net *net, struct tipc_msg *msg)
|
|
{
|
|
struct tipc_node *n_ptr = tipc_node_find(net, msg_destnode(msg));
|
|
|
|
if (unlikely(!n_ptr))
|
|
return;
|
|
|
|
tipc_node_lock(n_ptr);
|
|
if (n_ptr->bclink.recv_permitted &&
|
|
(n_ptr->bclink.last_in != n_ptr->bclink.last_sent) &&
|
|
(n_ptr->bclink.last_in == msg_bcgap_after(msg)))
|
|
n_ptr->bclink.oos_state = 2;
|
|
tipc_node_unlock(n_ptr);
|
|
tipc_node_put(n_ptr);
|
|
}
|
|
|
|
/* tipc_bcbase_xmit - broadcast a packet queue across one or more bearers
|
|
*
|
|
* Note that number of reachable destinations, as indicated in the dests[]
|
|
* array, may transitionally differ from the number of destinations indicated
|
|
* in each sent buffer. We can sustain this. Excess destination nodes will
|
|
* drop and never acknowledge the unexpected packets, and missing destinations
|
|
* will either require retransmission (if they are just about to be added to
|
|
* the bearer), or be removed from the buffer's 'ackers' counter (if they
|
|
* just went down)
|
|
*/
|
|
static void tipc_bcbase_xmit(struct net *net, struct sk_buff_head *xmitq)
|
|
{
|
|
int bearer_id;
|
|
struct tipc_bc_base *bb = tipc_bc_base(net);
|
|
struct sk_buff *skb, *_skb;
|
|
struct sk_buff_head _xmitq;
|
|
|
|
if (skb_queue_empty(xmitq))
|
|
return;
|
|
|
|
/* The typical case: at least one bearer has links to all nodes */
|
|
bearer_id = bb->primary_bearer;
|
|
if (bearer_id >= 0) {
|
|
tipc_bearer_bc_xmit(net, bearer_id, xmitq);
|
|
return;
|
|
}
|
|
|
|
/* We have to transmit across all bearers */
|
|
skb_queue_head_init(&_xmitq);
|
|
for (bearer_id = 0; bearer_id < MAX_BEARERS; bearer_id++) {
|
|
if (!bb->dests[bearer_id])
|
|
continue;
|
|
|
|
skb_queue_walk(xmitq, skb) {
|
|
_skb = pskb_copy_for_clone(skb, GFP_ATOMIC);
|
|
if (!_skb)
|
|
break;
|
|
__skb_queue_tail(&_xmitq, _skb);
|
|
}
|
|
tipc_bearer_bc_xmit(net, bearer_id, &_xmitq);
|
|
}
|
|
__skb_queue_purge(xmitq);
|
|
__skb_queue_purge(&_xmitq);
|
|
}
|
|
|
|
/* tipc_bcast_xmit - deliver buffer chain to all nodes in cluster
|
|
* and to identified node local sockets
|
|
* @net: the applicable net namespace
|
|
* @list: chain of buffers containing message
|
|
* Consumes the buffer chain, except when returning -ELINKCONG
|
|
* Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE
|
|
*/
|
|
int tipc_bcast_xmit(struct net *net, struct sk_buff_head *list)
|
|
{
|
|
struct tipc_link *l = tipc_bc_sndlink(net);
|
|
struct sk_buff_head xmitq, inputq, rcvq;
|
|
int rc = 0;
|
|
|
|
__skb_queue_head_init(&rcvq);
|
|
__skb_queue_head_init(&xmitq);
|
|
skb_queue_head_init(&inputq);
|
|
|
|
/* Prepare message clone for local node */
|
|
if (unlikely(!tipc_msg_reassemble(list, &rcvq)))
|
|
return -EHOSTUNREACH;
|
|
|
|
tipc_bcast_lock(net);
|
|
if (tipc_link_bc_peers(l))
|
|
rc = tipc_link_xmit(l, list, &xmitq);
|
|
tipc_bcast_unlock(net);
|
|
|
|
/* Don't send to local node if adding to link failed */
|
|
if (unlikely(rc)) {
|
|
__skb_queue_purge(&rcvq);
|
|
return rc;
|
|
}
|
|
|
|
/* Broadcast to all nodes, inluding local node */
|
|
tipc_bcbase_xmit(net, &xmitq);
|
|
tipc_sk_mcast_rcv(net, &rcvq, &inputq);
|
|
__skb_queue_purge(list);
|
|
return 0;
|
|
}
|
|
|
|
/* tipc_bcast_rcv - receive a broadcast packet, and deliver to rcv link
|
|
*
|
|
* RCU is locked, no other locks set
|
|
*/
|
|
int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb)
|
|
{
|
|
struct tipc_msg *hdr = buf_msg(skb);
|
|
struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq;
|
|
struct sk_buff_head xmitq;
|
|
int rc;
|
|
|
|
__skb_queue_head_init(&xmitq);
|
|
|
|
if (msg_mc_netid(hdr) != tipc_netid(net) || !tipc_link_is_up(l)) {
|
|
kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
tipc_bcast_lock(net);
|
|
if (msg_user(hdr) == BCAST_PROTOCOL)
|
|
rc = tipc_link_bc_nack_rcv(l, skb, &xmitq);
|
|
else
|
|
rc = tipc_link_rcv(l, skb, NULL);
|
|
tipc_bcast_unlock(net);
|
|
|
|
tipc_bcbase_xmit(net, &xmitq);
|
|
|
|
/* Any socket wakeup messages ? */
|
|
if (!skb_queue_empty(inputq))
|
|
tipc_sk_rcv(net, inputq);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/* tipc_bcast_ack_rcv - receive and handle a broadcast acknowledge
|
|
*
|
|
* RCU is locked, no other locks set
|
|
*/
|
|
void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l, u32 acked)
|
|
{
|
|
struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq;
|
|
struct sk_buff_head xmitq;
|
|
|
|
__skb_queue_head_init(&xmitq);
|
|
|
|
tipc_bcast_lock(net);
|
|
tipc_link_bc_ack_rcv(l, acked, &xmitq);
|
|
tipc_bcast_unlock(net);
|
|
|
|
tipc_bcbase_xmit(net, &xmitq);
|
|
|
|
/* Any socket wakeup messages ? */
|
|
if (!skb_queue_empty(inputq))
|
|
tipc_sk_rcv(net, inputq);
|
|
}
|
|
|
|
/* tipc_bcast_synch_rcv - check and update rcv link with peer's send state
|
|
*
|
|
* RCU is locked, no other locks set
|
|
*/
|
|
void tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l,
|
|
struct tipc_msg *hdr)
|
|
{
|
|
struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq;
|
|
struct sk_buff_head xmitq;
|
|
|
|
__skb_queue_head_init(&xmitq);
|
|
|
|
tipc_bcast_lock(net);
|
|
if (msg_type(hdr) == STATE_MSG) {
|
|
tipc_link_bc_ack_rcv(l, msg_bcast_ack(hdr), &xmitq);
|
|
tipc_link_bc_sync_rcv(l, hdr, &xmitq);
|
|
} else {
|
|
tipc_link_bc_init_rcv(l, hdr);
|
|
}
|
|
tipc_bcast_unlock(net);
|
|
|
|
tipc_bcbase_xmit(net, &xmitq);
|
|
|
|
/* Any socket wakeup messages ? */
|
|
if (!skb_queue_empty(inputq))
|
|
tipc_sk_rcv(net, inputq);
|
|
}
|
|
|
|
/* tipc_bcast_add_peer - add a peer node to broadcast link and bearer
|
|
*
|
|
* RCU is locked, node lock is set
|
|
*/
|
|
void tipc_bcast_add_peer(struct net *net, struct tipc_link *uc_l,
|
|
struct sk_buff_head *xmitq)
|
|
{
|
|
struct tipc_link *snd_l = tipc_bc_sndlink(net);
|
|
|
|
tipc_bcast_lock(net);
|
|
tipc_link_add_bc_peer(snd_l, uc_l, xmitq);
|
|
tipc_bcbase_select_primary(net);
|
|
tipc_bcast_unlock(net);
|
|
}
|
|
|
|
/* tipc_bcast_remove_peer - remove a peer node from broadcast link and bearer
|
|
*
|
|
* RCU is locked, node lock is set
|
|
*/
|
|
void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_l)
|
|
{
|
|
struct tipc_link *snd_l = tipc_bc_sndlink(net);
|
|
struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq;
|
|
struct sk_buff_head xmitq;
|
|
|
|
__skb_queue_head_init(&xmitq);
|
|
|
|
tipc_bcast_lock(net);
|
|
tipc_link_remove_bc_peer(snd_l, rcv_l, &xmitq);
|
|
tipc_bcbase_select_primary(net);
|
|
tipc_bcast_unlock(net);
|
|
|
|
tipc_bcbase_xmit(net, &xmitq);
|
|
|
|
/* Any socket wakeup messages ? */
|
|
if (!skb_queue_empty(inputq))
|
|
tipc_sk_rcv(net, inputq);
|
|
}
|
|
|
|
/**
|
|
* bclink_accept_pkt - accept an incoming, in-sequence broadcast packet
|
|
*
|
|
* Called with both sending node's lock and bclink_lock taken.
|
|
*/
|
|
static void bclink_accept_pkt(struct tipc_node *node, u32 seqno)
|
|
{
|
|
struct tipc_net *tn = net_generic(node->net, tipc_net_id);
|
|
|
|
bclink_update_last_sent(node, seqno);
|
|
node->bclink.last_in = seqno;
|
|
node->bclink.oos_state = 0;
|
|
tn->bcl->stats.recv_info++;
|
|
|
|
/*
|
|
* Unicast an ACK periodically, ensuring that
|
|
* all nodes in the cluster don't ACK at the same time
|
|
*/
|
|
if (((seqno - tn->own_addr) % TIPC_MIN_LINK_WIN) == 0) {
|
|
tipc_link_proto_xmit(node_active_link(node, node->addr),
|
|
STATE_MSG, 0, 0, 0, 0);
|
|
tn->bcl->stats.sent_acks++;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* tipc_bclink_rcv - receive a broadcast packet, and deliver upwards
|
|
*
|
|
* RCU is locked, no other locks set
|
|
*/
|
|
void tipc_bclink_rcv(struct net *net, struct sk_buff *buf)
|
|
{
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
struct tipc_link *bcl = tn->bcl;
|
|
struct tipc_msg *msg = buf_msg(buf);
|
|
struct tipc_node *node;
|
|
u32 next_in;
|
|
u32 seqno;
|
|
int deferred = 0;
|
|
int pos = 0;
|
|
struct sk_buff *iskb;
|
|
struct sk_buff_head *arrvq, *inputq;
|
|
|
|
/* Screen out unwanted broadcast messages */
|
|
if (msg_mc_netid(msg) != tn->net_id)
|
|
goto exit;
|
|
|
|
node = tipc_node_find(net, msg_prevnode(msg));
|
|
if (unlikely(!node))
|
|
goto exit;
|
|
tipc_node_lock(node);
|
|
if (unlikely(!node->bclink.recv_permitted))
|
|
goto unlock;
|
|
|
|
/* Handle broadcast protocol message */
|
|
if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) {
|
|
if (msg_type(msg) != STATE_MSG)
|
|
goto unlock;
|
|
if (msg_destnode(msg) == tn->own_addr) {
|
|
tipc_bclink_acknowledge(node, msg_bcast_ack(msg));
|
|
tipc_bclink_lock(net);
|
|
bcl->stats.recv_nacks++;
|
|
tn->bcbase->retransmit_to = node;
|
|
bclink_retransmit_pkt(tn, msg_bcgap_after(msg),
|
|
msg_bcgap_to(msg));
|
|
tipc_bclink_unlock(net);
|
|
tipc_node_unlock(node);
|
|
} else {
|
|
tipc_node_unlock(node);
|
|
bclink_peek_nack(net, msg);
|
|
}
|
|
tipc_node_put(node);
|
|
goto exit;
|
|
}
|
|
/* Handle in-sequence broadcast message */
|
|
seqno = msg_seqno(msg);
|
|
next_in = mod(node->bclink.last_in + 1);
|
|
arrvq = &tn->bcbase->arrvq;
|
|
inputq = &tn->bcbase->inputq;
|
|
|
|
if (likely(seqno == next_in)) {
|
|
receive:
|
|
/* Deliver message to destination */
|
|
if (likely(msg_isdata(msg))) {
|
|
tipc_bclink_lock(net);
|
|
bclink_accept_pkt(node, seqno);
|
|
spin_lock_bh(&inputq->lock);
|
|
__skb_queue_tail(arrvq, buf);
|
|
spin_unlock_bh(&inputq->lock);
|
|
node->action_flags |= TIPC_BCAST_MSG_EVT;
|
|
tipc_bclink_unlock(net);
|
|
tipc_node_unlock(node);
|
|
} else if (msg_user(msg) == MSG_BUNDLER) {
|
|
tipc_bclink_lock(net);
|
|
bclink_accept_pkt(node, seqno);
|
|
bcl->stats.recv_bundles++;
|
|
bcl->stats.recv_bundled += msg_msgcnt(msg);
|
|
pos = 0;
|
|
while (tipc_msg_extract(buf, &iskb, &pos)) {
|
|
spin_lock_bh(&inputq->lock);
|
|
__skb_queue_tail(arrvq, iskb);
|
|
spin_unlock_bh(&inputq->lock);
|
|
}
|
|
node->action_flags |= TIPC_BCAST_MSG_EVT;
|
|
tipc_bclink_unlock(net);
|
|
tipc_node_unlock(node);
|
|
} else if (msg_user(msg) == MSG_FRAGMENTER) {
|
|
tipc_bclink_lock(net);
|
|
bclink_accept_pkt(node, seqno);
|
|
tipc_buf_append(&node->bclink.reasm_buf, &buf);
|
|
if (unlikely(!buf && !node->bclink.reasm_buf)) {
|
|
tipc_bclink_unlock(net);
|
|
goto unlock;
|
|
}
|
|
bcl->stats.recv_fragments++;
|
|
if (buf) {
|
|
bcl->stats.recv_fragmented++;
|
|
msg = buf_msg(buf);
|
|
tipc_bclink_unlock(net);
|
|
goto receive;
|
|
}
|
|
tipc_bclink_unlock(net);
|
|
tipc_node_unlock(node);
|
|
} else {
|
|
tipc_bclink_lock(net);
|
|
bclink_accept_pkt(node, seqno);
|
|
tipc_bclink_unlock(net);
|
|
tipc_node_unlock(node);
|
|
kfree_skb(buf);
|
|
}
|
|
buf = NULL;
|
|
|
|
/* Determine new synchronization state */
|
|
tipc_node_lock(node);
|
|
if (unlikely(!tipc_node_is_up(node)))
|
|
goto unlock;
|
|
|
|
if (node->bclink.last_in == node->bclink.last_sent)
|
|
goto unlock;
|
|
|
|
if (skb_queue_empty(&node->bclink.deferdq)) {
|
|
node->bclink.oos_state = 1;
|
|
goto unlock;
|
|
}
|
|
|
|
msg = buf_msg(skb_peek(&node->bclink.deferdq));
|
|
seqno = msg_seqno(msg);
|
|
next_in = mod(next_in + 1);
|
|
if (seqno != next_in)
|
|
goto unlock;
|
|
|
|
/* Take in-sequence message from deferred queue & deliver it */
|
|
buf = __skb_dequeue(&node->bclink.deferdq);
|
|
goto receive;
|
|
}
|
|
|
|
/* Handle out-of-sequence broadcast message */
|
|
if (less(next_in, seqno)) {
|
|
deferred = tipc_link_defer_pkt(&node->bclink.deferdq,
|
|
buf);
|
|
bclink_update_last_sent(node, seqno);
|
|
buf = NULL;
|
|
}
|
|
|
|
tipc_bclink_lock(net);
|
|
|
|
if (deferred)
|
|
bcl->stats.deferred_recv++;
|
|
else
|
|
bcl->stats.duplicates++;
|
|
|
|
tipc_bclink_unlock(net);
|
|
|
|
unlock:
|
|
tipc_node_unlock(node);
|
|
tipc_node_put(node);
|
|
exit:
|
|
kfree_skb(buf);
|
|
}
|
|
|
|
u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr)
|
|
{
|
|
return (n_ptr->bclink.recv_permitted &&
|
|
(tipc_bclink_get_last_sent(n_ptr->net) != n_ptr->bclink.acked));
|
|
}
|
|
|
|
|
|
/**
|
|
* tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer
|
|
*
|
|
* Send packet over as many bearers as necessary to reach all nodes
|
|
* that have joined the broadcast link.
|
|
*
|
|
* Returns 0 (packet sent successfully) under all circumstances,
|
|
* since the broadcast link's pseudo-bearer never blocks
|
|
*/
|
|
static int tipc_bcbearer_send(struct net *net, struct sk_buff *buf,
|
|
struct tipc_bearer *unused1,
|
|
struct tipc_media_addr *unused2)
|
|
{
|
|
int bp_index;
|
|
struct tipc_msg *msg = buf_msg(buf);
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
struct tipc_bcbearer *bcbearer = tn->bcbearer;
|
|
struct tipc_bc_base *bclink = tn->bcbase;
|
|
|
|
/* Prepare broadcast link message for reliable transmission,
|
|
* if first time trying to send it;
|
|
* preparation is skipped for broadcast link protocol messages
|
|
* since they are sent in an unreliable manner and don't need it
|
|
*/
|
|
if (likely(!msg_non_seq(buf_msg(buf)))) {
|
|
bcbuf_set_acks(buf, bclink->bcast_nodes.count);
|
|
msg_set_non_seq(msg, 1);
|
|
msg_set_mc_netid(msg, tn->net_id);
|
|
tn->bcl->stats.sent_info++;
|
|
if (WARN_ON(!bclink->bcast_nodes.count)) {
|
|
dump_stack();
|
|
return 0;
|
|
}
|
|
}
|
|
msg_set_mc_netid(msg, tn->net_id);
|
|
|
|
/* Send buffer over bearers until all targets reached */
|
|
bcbearer->remains = bclink->bcast_nodes;
|
|
|
|
for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) {
|
|
struct tipc_bearer *p = bcbearer->bpairs[bp_index].primary;
|
|
struct tipc_bearer *s = bcbearer->bpairs[bp_index].secondary;
|
|
struct tipc_bearer *bp[2] = {p, s};
|
|
struct tipc_bearer *b = bp[msg_link_selector(msg)];
|
|
struct sk_buff *tbuf;
|
|
|
|
if (!p)
|
|
break; /* No more bearers to try */
|
|
if (!b)
|
|
b = p;
|
|
tipc_nmap_diff(&bcbearer->remains, &b->nodes,
|
|
&bcbearer->remains_new);
|
|
if (bcbearer->remains_new.count == bcbearer->remains.count)
|
|
continue; /* Nothing added by bearer pair */
|
|
|
|
if (bp_index == 0) {
|
|
/* Use original buffer for first bearer */
|
|
tipc_bearer_send(net, b->identity, buf, &b->bcast_addr);
|
|
} else {
|
|
/* Avoid concurrent buffer access */
|
|
tbuf = pskb_copy_for_clone(buf, GFP_ATOMIC);
|
|
if (!tbuf)
|
|
break;
|
|
tipc_bearer_send(net, b->identity, tbuf,
|
|
&b->bcast_addr);
|
|
kfree_skb(tbuf); /* Bearer keeps a clone */
|
|
}
|
|
if (bcbearer->remains_new.count == 0)
|
|
break; /* All targets reached */
|
|
|
|
bcbearer->remains = bcbearer->remains_new;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* tipc_bcbearer_sort - create sets of bearer pairs used by broadcast bearer
|
|
*/
|
|
void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr,
|
|
u32 node, bool action)
|
|
{
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
struct tipc_bcbearer *bcbearer = tn->bcbearer;
|
|
struct tipc_bcbearer_pair *bp_temp = bcbearer->bpairs_temp;
|
|
struct tipc_bcbearer_pair *bp_curr;
|
|
struct tipc_bearer *b;
|
|
int b_index;
|
|
int pri;
|
|
|
|
tipc_bclink_lock(net);
|
|
|
|
if (action)
|
|
tipc_nmap_add(nm_ptr, node);
|
|
else
|
|
tipc_nmap_remove(nm_ptr, node);
|
|
|
|
/* Group bearers by priority (can assume max of two per priority) */
|
|
memset(bp_temp, 0, sizeof(bcbearer->bpairs_temp));
|
|
|
|
rcu_read_lock();
|
|
for (b_index = 0; b_index < MAX_BEARERS; b_index++) {
|
|
b = rcu_dereference_rtnl(tn->bearer_list[b_index]);
|
|
if (!b || !b->nodes.count)
|
|
continue;
|
|
|
|
if (!bp_temp[b->priority].primary)
|
|
bp_temp[b->priority].primary = b;
|
|
else
|
|
bp_temp[b->priority].secondary = b;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
/* Create array of bearer pairs for broadcasting */
|
|
bp_curr = bcbearer->bpairs;
|
|
memset(bcbearer->bpairs, 0, sizeof(bcbearer->bpairs));
|
|
|
|
for (pri = TIPC_MAX_LINK_PRI; pri >= 0; pri--) {
|
|
|
|
if (!bp_temp[pri].primary)
|
|
continue;
|
|
|
|
bp_curr->primary = bp_temp[pri].primary;
|
|
|
|
if (bp_temp[pri].secondary) {
|
|
if (tipc_nmap_equal(&bp_temp[pri].primary->nodes,
|
|
&bp_temp[pri].secondary->nodes)) {
|
|
bp_curr->secondary = bp_temp[pri].secondary;
|
|
} else {
|
|
bp_curr++;
|
|
bp_curr->primary = bp_temp[pri].secondary;
|
|
}
|
|
}
|
|
|
|
bp_curr++;
|
|
}
|
|
|
|
tipc_bclink_unlock(net);
|
|
}
|
|
|
|
static int __tipc_nl_add_bc_link_stat(struct sk_buff *skb,
|
|
struct tipc_stats *stats)
|
|
{
|
|
int i;
|
|
struct nlattr *nest;
|
|
|
|
struct nla_map {
|
|
__u32 key;
|
|
__u32 val;
|
|
};
|
|
|
|
struct nla_map map[] = {
|
|
{TIPC_NLA_STATS_RX_INFO, stats->recv_info},
|
|
{TIPC_NLA_STATS_RX_FRAGMENTS, stats->recv_fragments},
|
|
{TIPC_NLA_STATS_RX_FRAGMENTED, stats->recv_fragmented},
|
|
{TIPC_NLA_STATS_RX_BUNDLES, stats->recv_bundles},
|
|
{TIPC_NLA_STATS_RX_BUNDLED, stats->recv_bundled},
|
|
{TIPC_NLA_STATS_TX_INFO, stats->sent_info},
|
|
{TIPC_NLA_STATS_TX_FRAGMENTS, stats->sent_fragments},
|
|
{TIPC_NLA_STATS_TX_FRAGMENTED, stats->sent_fragmented},
|
|
{TIPC_NLA_STATS_TX_BUNDLES, stats->sent_bundles},
|
|
{TIPC_NLA_STATS_TX_BUNDLED, stats->sent_bundled},
|
|
{TIPC_NLA_STATS_RX_NACKS, stats->recv_nacks},
|
|
{TIPC_NLA_STATS_RX_DEFERRED, stats->deferred_recv},
|
|
{TIPC_NLA_STATS_TX_NACKS, stats->sent_nacks},
|
|
{TIPC_NLA_STATS_TX_ACKS, stats->sent_acks},
|
|
{TIPC_NLA_STATS_RETRANSMITTED, stats->retransmitted},
|
|
{TIPC_NLA_STATS_DUPLICATES, stats->duplicates},
|
|
{TIPC_NLA_STATS_LINK_CONGS, stats->link_congs},
|
|
{TIPC_NLA_STATS_MAX_QUEUE, stats->max_queue_sz},
|
|
{TIPC_NLA_STATS_AVG_QUEUE, stats->queue_sz_counts ?
|
|
(stats->accu_queue_sz / stats->queue_sz_counts) : 0}
|
|
};
|
|
|
|
nest = nla_nest_start(skb, TIPC_NLA_LINK_STATS);
|
|
if (!nest)
|
|
return -EMSGSIZE;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(map); i++)
|
|
if (nla_put_u32(skb, map[i].key, map[i].val))
|
|
goto msg_full;
|
|
|
|
nla_nest_end(skb, nest);
|
|
|
|
return 0;
|
|
msg_full:
|
|
nla_nest_cancel(skb, nest);
|
|
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg)
|
|
{
|
|
int err;
|
|
void *hdr;
|
|
struct nlattr *attrs;
|
|
struct nlattr *prop;
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
struct tipc_link *bcl = tn->bcl;
|
|
|
|
if (!bcl)
|
|
return 0;
|
|
|
|
tipc_bclink_lock(net);
|
|
|
|
hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
|
|
NLM_F_MULTI, TIPC_NL_LINK_GET);
|
|
if (!hdr)
|
|
return -EMSGSIZE;
|
|
|
|
attrs = nla_nest_start(msg->skb, TIPC_NLA_LINK);
|
|
if (!attrs)
|
|
goto msg_full;
|
|
|
|
/* The broadcast link is always up */
|
|
if (nla_put_flag(msg->skb, TIPC_NLA_LINK_UP))
|
|
goto attr_msg_full;
|
|
|
|
if (nla_put_flag(msg->skb, TIPC_NLA_LINK_BROADCAST))
|
|
goto attr_msg_full;
|
|
if (nla_put_string(msg->skb, TIPC_NLA_LINK_NAME, bcl->name))
|
|
goto attr_msg_full;
|
|
if (nla_put_u32(msg->skb, TIPC_NLA_LINK_RX, bcl->rcv_nxt))
|
|
goto attr_msg_full;
|
|
if (nla_put_u32(msg->skb, TIPC_NLA_LINK_TX, bcl->snd_nxt))
|
|
goto attr_msg_full;
|
|
|
|
prop = nla_nest_start(msg->skb, TIPC_NLA_LINK_PROP);
|
|
if (!prop)
|
|
goto attr_msg_full;
|
|
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bcl->window))
|
|
goto prop_msg_full;
|
|
nla_nest_end(msg->skb, prop);
|
|
|
|
err = __tipc_nl_add_bc_link_stat(msg->skb, &bcl->stats);
|
|
if (err)
|
|
goto attr_msg_full;
|
|
|
|
tipc_bclink_unlock(net);
|
|
nla_nest_end(msg->skb, attrs);
|
|
genlmsg_end(msg->skb, hdr);
|
|
|
|
return 0;
|
|
|
|
prop_msg_full:
|
|
nla_nest_cancel(msg->skb, prop);
|
|
attr_msg_full:
|
|
nla_nest_cancel(msg->skb, attrs);
|
|
msg_full:
|
|
tipc_bclink_unlock(net);
|
|
genlmsg_cancel(msg->skb, hdr);
|
|
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
int tipc_bclink_reset_stats(struct net *net)
|
|
{
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
struct tipc_link *bcl = tn->bcl;
|
|
|
|
if (!bcl)
|
|
return -ENOPROTOOPT;
|
|
|
|
tipc_bclink_lock(net);
|
|
memset(&bcl->stats, 0, sizeof(bcl->stats));
|
|
tipc_bclink_unlock(net);
|
|
return 0;
|
|
}
|
|
|
|
int tipc_bclink_set_queue_limits(struct net *net, u32 limit)
|
|
{
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
struct tipc_link *bcl = tn->bcl;
|
|
|
|
if (!bcl)
|
|
return -ENOPROTOOPT;
|
|
if (limit < BCLINK_WIN_MIN)
|
|
limit = BCLINK_WIN_MIN;
|
|
if (limit > TIPC_MAX_LINK_WIN)
|
|
return -EINVAL;
|
|
tipc_bclink_lock(net);
|
|
tipc_link_set_queue_limits(bcl, limit);
|
|
tipc_bclink_unlock(net);
|
|
return 0;
|
|
}
|
|
|
|
int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[])
|
|
{
|
|
int err;
|
|
u32 win;
|
|
struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
|
|
|
|
if (!attrs[TIPC_NLA_LINK_PROP])
|
|
return -EINVAL;
|
|
|
|
err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], props);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!props[TIPC_NLA_PROP_WIN])
|
|
return -EOPNOTSUPP;
|
|
|
|
win = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
|
|
|
|
return tipc_bclink_set_queue_limits(net, win);
|
|
}
|
|
|
|
int tipc_bcast_init(struct net *net)
|
|
{
|
|
struct tipc_net *tn = tipc_net(net);
|
|
struct tipc_bcbearer *bcb = NULL;
|
|
struct tipc_bc_base *bb = NULL;
|
|
struct tipc_link *l = NULL;
|
|
|
|
bcb = kzalloc(sizeof(*bcb), GFP_ATOMIC);
|
|
if (!bcb)
|
|
goto enomem;
|
|
tn->bcbearer = bcb;
|
|
|
|
bcb->bearer.window = BCLINK_WIN_DEFAULT;
|
|
bcb->bearer.mtu = MAX_PKT_DEFAULT_MCAST;
|
|
bcb->bearer.identity = MAX_BEARERS;
|
|
|
|
bcb->bearer.media = &bcb->media;
|
|
bcb->media.send_msg = tipc_bcbearer_send;
|
|
sprintf(bcb->media.name, "tipc-broadcast");
|
|
strcpy(bcb->bearer.name, bcb->media.name);
|
|
|
|
bb = kzalloc(sizeof(*bb), GFP_ATOMIC);
|
|
if (!bb)
|
|
goto enomem;
|
|
tn->bcbase = bb;
|
|
__skb_queue_head_init(&bb->arrvq);
|
|
spin_lock_init(&tipc_net(net)->bclock);
|
|
bb->node.net = net;
|
|
|
|
if (!tipc_link_bc_create(&bb->node, 0, 0,
|
|
U16_MAX,
|
|
BCLINK_WIN_DEFAULT,
|
|
0,
|
|
&bb->inputq,
|
|
&bb->namedq,
|
|
NULL,
|
|
&l))
|
|
goto enomem;
|
|
bb->link = l;
|
|
tn->bcl = l;
|
|
rcu_assign_pointer(tn->bearer_list[MAX_BEARERS], &bcb->bearer);
|
|
return 0;
|
|
enomem:
|
|
kfree(bcb);
|
|
kfree(bb);
|
|
kfree(l);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
void tipc_bcast_reinit(struct net *net)
|
|
{
|
|
struct tipc_bc_base *b = tipc_bc_base(net);
|
|
|
|
msg_set_prevnode(b->link->pmsg, tipc_own_addr(net));
|
|
}
|
|
|
|
void tipc_bcast_stop(struct net *net)
|
|
{
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
|
|
tipc_bclink_lock(net);
|
|
tipc_link_purge_queues(tn->bcl);
|
|
tipc_bclink_unlock(net);
|
|
RCU_INIT_POINTER(tn->bearer_list[BCBEARER], NULL);
|
|
synchronize_net();
|
|
kfree(tn->bcbearer);
|
|
kfree(tn->bcbase);
|
|
kfree(tn->bcl);
|
|
}
|
|
|
|
/**
|
|
* tipc_nmap_add - add a node to a node map
|
|
*/
|
|
static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node)
|
|
{
|
|
int n = tipc_node(node);
|
|
int w = n / WSIZE;
|
|
u32 mask = (1 << (n % WSIZE));
|
|
|
|
if ((nm_ptr->map[w] & mask) == 0) {
|
|
nm_ptr->count++;
|
|
nm_ptr->map[w] |= mask;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* tipc_nmap_remove - remove a node from a node map
|
|
*/
|
|
static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node)
|
|
{
|
|
int n = tipc_node(node);
|
|
int w = n / WSIZE;
|
|
u32 mask = (1 << (n % WSIZE));
|
|
|
|
if ((nm_ptr->map[w] & mask) != 0) {
|
|
nm_ptr->map[w] &= ~mask;
|
|
nm_ptr->count--;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* tipc_nmap_diff - find differences between node maps
|
|
* @nm_a: input node map A
|
|
* @nm_b: input node map B
|
|
* @nm_diff: output node map A-B (i.e. nodes of A that are not in B)
|
|
*/
|
|
static void tipc_nmap_diff(struct tipc_node_map *nm_a,
|
|
struct tipc_node_map *nm_b,
|
|
struct tipc_node_map *nm_diff)
|
|
{
|
|
int stop = ARRAY_SIZE(nm_a->map);
|
|
int w;
|
|
int b;
|
|
u32 map;
|
|
|
|
memset(nm_diff, 0, sizeof(*nm_diff));
|
|
for (w = 0; w < stop; w++) {
|
|
map = nm_a->map[w] ^ (nm_a->map[w] & nm_b->map[w]);
|
|
nm_diff->map[w] = map;
|
|
if (map != 0) {
|
|
for (b = 0 ; b < WSIZE; b++) {
|
|
if (map & (1 << b))
|
|
nm_diff->count++;
|
|
}
|
|
}
|
|
}
|
|
}
|