^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * net/tipc/bcast.c: TIPC broadcast code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2004-2006, 2014-2017, Ericsson AB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2004, Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 2005, 2010-2011, Wind River Systems
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Redistribution and use in source and binary forms, with or without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * modification, are permitted provided that the following conditions are met:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * 1. Redistributions of source code must retain the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * notice, this list of conditions and the following disclaimer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * 2. Redistributions in binary form must reproduce the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * notice, this list of conditions and the following disclaimer in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * documentation and/or other materials provided with the distribution.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * 3. Neither the names of the copyright holders nor the names of its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * contributors may be used to endorse or promote products derived from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * this software without specific prior written permission.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Alternatively, this software may be distributed under the terms of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * GNU General Public License ("GPL") version 2 as published by the Free
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * POSSIBILITY OF SUCH DAMAGE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/tipc_config.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include "socket.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include "msg.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include "bcast.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include "link.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include "name_table.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define BCLINK_WIN_DEFAULT 50 /* bcast link window size (default) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define BCLINK_WIN_MIN 32 /* bcast minimum link window size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) const char tipc_bclink_name[] = "broadcast-link";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) unsigned long sysctl_tipc_bc_retruni __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * struct tipc_bc_base - base structure for keeping broadcast send state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * @link: broadcast send link structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * @inputq: data input queue; will only carry SOCK_WAKEUP messages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * @dests: array keeping number of reachable destinations per bearer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * @primary_bearer: a bearer having links to all broadcast destinations, if any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * @bcast_support: indicates if primary bearer, if any, supports broadcast
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * @force_bcast: forces broadcast for multicast traffic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * @rcast_support: indicates if all peer nodes support replicast
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * @force_rcast: forces replicast for multicast traffic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * @rc_ratio: dest count as percentage of cluster size where send method changes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * @bc_threshold: calculated from rc_ratio; if dests > threshold use broadcast
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct tipc_bc_base {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct tipc_link *link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct sk_buff_head inputq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) int dests[MAX_BEARERS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int primary_bearer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) bool bcast_support;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) bool force_bcast;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) bool rcast_support;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) bool force_rcast;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) int rc_ratio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) int bc_threshold;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static struct tipc_bc_base *tipc_bc_base(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return tipc_net(net)->bcbase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /* tipc_bcast_get_mtu(): -get the MTU currently used by broadcast link
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * Note: the MTU is decremented to give room for a tunnel header, in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * case the message needs to be sent as replicast
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) int tipc_bcast_get_mtu(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return tipc_link_mss(tipc_bc_sndlink(net));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) void tipc_bcast_toggle_rcast(struct net *net, bool supp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) tipc_bc_base(net)->rcast_support = supp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) static void tipc_bcbase_calc_bc_threshold(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct tipc_bc_base *bb = tipc_bc_base(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) int cluster_size = tipc_link_bc_peers(tipc_bc_sndlink(net));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) bb->bc_threshold = 1 + (cluster_size * bb->rc_ratio / 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /* tipc_bcbase_select_primary(): find a bearer with links to all destinations,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * if any, and make it primary bearer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static void tipc_bcbase_select_primary(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct tipc_bc_base *bb = tipc_bc_base(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) int all_dests = tipc_link_bc_peers(bb->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) int max_win = tipc_link_max_win(bb->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) int min_win = tipc_link_min_win(bb->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) int i, mtu, prim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) bb->primary_bearer = INVALID_BEARER_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) bb->bcast_support = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (!all_dests)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) for (i = 0; i < MAX_BEARERS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (!bb->dests[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) mtu = tipc_bearer_mtu(net, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (mtu < tipc_link_mtu(bb->link)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) tipc_link_set_mtu(bb->link, mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) tipc_link_set_queue_limits(bb->link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) min_win,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) max_win);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) bb->bcast_support &= tipc_bearer_bcast_support(net, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (bb->dests[i] < all_dests)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) bb->primary_bearer = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /* Reduce risk that all nodes select same primary */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if ((i ^ tipc_own_addr(net)) & 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) prim = bb->primary_bearer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (prim != INVALID_BEARER_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) bb->bcast_support = tipc_bearer_bcast_support(net, prim);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct tipc_bc_base *bb = tipc_bc_base(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) tipc_bcast_lock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) bb->dests[bearer_id]++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) tipc_bcbase_select_primary(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) tipc_bcast_unlock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct tipc_bc_base *bb = tipc_bc_base(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) tipc_bcast_lock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) bb->dests[bearer_id]--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) tipc_bcbase_select_primary(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) tipc_bcast_unlock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) /* tipc_bcbase_xmit - broadcast a packet queue across one or more bearers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) * Note that number of reachable destinations, as indicated in the dests[]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) * array, may transitionally differ from the number of destinations indicated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) * in each sent buffer. We can sustain this. Excess destination nodes will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) * drop and never acknowledge the unexpected packets, and missing destinations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) * will either require retransmission (if they are just about to be added to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) * the bearer), or be removed from the buffer's 'ackers' counter (if they
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * just went down)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static void tipc_bcbase_xmit(struct net *net, struct sk_buff_head *xmitq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) int bearer_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct tipc_bc_base *bb = tipc_bc_base(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) struct sk_buff *skb, *_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct sk_buff_head _xmitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (skb_queue_empty(xmitq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) /* The typical case: at least one bearer has links to all nodes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) bearer_id = bb->primary_bearer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (bearer_id >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) tipc_bearer_bc_xmit(net, bearer_id, xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /* We have to transmit across all bearers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) __skb_queue_head_init(&_xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) for (bearer_id = 0; bearer_id < MAX_BEARERS; bearer_id++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (!bb->dests[bearer_id])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) skb_queue_walk(xmitq, skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) _skb = pskb_copy_for_clone(skb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (!_skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) __skb_queue_tail(&_xmitq, _skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) tipc_bearer_bc_xmit(net, bearer_id, &_xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) __skb_queue_purge(xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) __skb_queue_purge(&_xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static void tipc_bcast_select_xmit_method(struct net *net, int dests,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct tipc_mc_method *method)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct tipc_bc_base *bb = tipc_bc_base(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) unsigned long exp = method->expires;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /* Broadcast supported by used bearer/bearers? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (!bb->bcast_support) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) method->rcast = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /* Any destinations which don't support replicast ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (!bb->rcast_support) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) method->rcast = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) /* Can current method be changed ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) method->expires = jiffies + TIPC_METHOD_EXPIRE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (method->mandatory)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (!(tipc_net(net)->capabilities & TIPC_MCAST_RBCTL) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) time_before(jiffies, exp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) /* Configuration as force 'broadcast' method */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (bb->force_bcast) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) method->rcast = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /* Configuration as force 'replicast' method */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) if (bb->force_rcast) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) method->rcast = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) /* Configuration as 'autoselect' or default method */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) /* Determine method to use now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) method->rcast = dests <= bb->bc_threshold;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) /* tipc_bcast_xmit - broadcast the buffer chain to all external nodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) * @net: the applicable net namespace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) * @pkts: chain of buffers containing message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * @cong_link_cnt: set to 1 if broadcast link is congested, otherwise 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * Consumes the buffer chain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) * Returns 0 if success, otherwise errno: -EHOSTUNREACH,-EMSGSIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) int tipc_bcast_xmit(struct net *net, struct sk_buff_head *pkts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) u16 *cong_link_cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) struct tipc_link *l = tipc_bc_sndlink(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) struct sk_buff_head xmitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) __skb_queue_head_init(&xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) tipc_bcast_lock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (tipc_link_bc_peers(l))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) rc = tipc_link_xmit(l, pkts, &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) tipc_bcast_unlock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) tipc_bcbase_xmit(net, &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) __skb_queue_purge(pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) if (rc == -ELINKCONG) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) *cong_link_cnt = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) /* tipc_rcast_xmit - replicate and send a message to given destination nodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * @net: the applicable net namespace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * @pkts: chain of buffers containing message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) * @dests: list of destination nodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) * @cong_link_cnt: returns number of congested links
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) * @cong_links: returns identities of congested links
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) * Returns 0 if success, otherwise errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static int tipc_rcast_xmit(struct net *net, struct sk_buff_head *pkts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) struct tipc_nlist *dests, u16 *cong_link_cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) struct tipc_dest *dst, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) struct sk_buff_head _pkts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) u32 dnode, selector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) selector = msg_link_selector(buf_msg(skb_peek(pkts)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) __skb_queue_head_init(&_pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) list_for_each_entry_safe(dst, tmp, &dests->list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) dnode = dst->node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) if (!tipc_msg_pskb_copy(dnode, pkts, &_pkts))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) /* Any other return value than -ELINKCONG is ignored */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if (tipc_node_xmit(net, &_pkts, dnode, selector) == -ELINKCONG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) (*cong_link_cnt)++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) /* tipc_mcast_send_sync - deliver a dummy message with SYN bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * @net: the applicable net namespace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) * @skb: socket buffer to copy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) * @method: send method to be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) * @dests: destination nodes for message.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) * Returns 0 if success, otherwise errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) static int tipc_mcast_send_sync(struct net *net, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) struct tipc_mc_method *method,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) struct tipc_nlist *dests)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) struct tipc_msg *hdr, *_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) struct sk_buff_head tmpq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) struct sk_buff *_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) u16 cong_link_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) /* Is a cluster supporting with new capabilities ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (!(tipc_net(net)->capabilities & TIPC_MCAST_RBCTL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (msg_user(hdr) == MSG_FRAGMENTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) hdr = msg_inner_hdr(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (msg_type(hdr) != TIPC_MCAST_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) /* Allocate dummy message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) _skb = tipc_buf_acquire(MCAST_H_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (!_skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) /* Preparing for 'synching' header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) msg_set_syn(hdr, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) /* Copy skb's header into a dummy header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) skb_copy_to_linear_data(_skb, hdr, MCAST_H_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) skb_orphan(_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) /* Reverse method for dummy message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) _hdr = buf_msg(_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) msg_set_size(_hdr, MCAST_H_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) msg_set_is_rcast(_hdr, !msg_is_rcast(hdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) msg_set_errcode(_hdr, TIPC_ERR_NO_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) __skb_queue_head_init(&tmpq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) __skb_queue_tail(&tmpq, _skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (method->rcast)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) rc = tipc_bcast_xmit(net, &tmpq, &cong_link_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) rc = tipc_rcast_xmit(net, &tmpq, dests, &cong_link_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) /* This queue should normally be empty by now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) __skb_queue_purge(&tmpq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) /* tipc_mcast_xmit - deliver message to indicated destination nodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) * and to identified node local sockets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) * @net: the applicable net namespace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) * @pkts: chain of buffers containing message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) * @method: send method to be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) * @dests: destination nodes for message.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * @cong_link_cnt: returns number of encountered congested destination links
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) * Consumes buffer chain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) * Returns 0 if success, otherwise errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) int tipc_mcast_xmit(struct net *net, struct sk_buff_head *pkts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) struct tipc_mc_method *method, struct tipc_nlist *dests,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) u16 *cong_link_cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) struct sk_buff_head inputq, localq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) bool rcast = method->rcast;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) struct tipc_msg *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) skb_queue_head_init(&inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) __skb_queue_head_init(&localq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) /* Clone packets before they are consumed by next call */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) if (dests->local && !tipc_msg_reassemble(pkts, &localq)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) /* Send according to determined transmit method */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) if (dests->remote) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) tipc_bcast_select_xmit_method(net, dests->remote, method);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) skb = skb_peek(pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (msg_user(hdr) == MSG_FRAGMENTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) hdr = msg_inner_hdr(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) msg_set_is_rcast(hdr, method->rcast);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) /* Switch method ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) if (rcast != method->rcast) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) rc = tipc_mcast_send_sync(net, skb, method, dests);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) if (unlikely(rc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) pr_err("Unable to send SYN: method %d, rc %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) rcast, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (method->rcast)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) rc = tipc_rcast_xmit(net, pkts, dests, cong_link_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) rc = tipc_bcast_xmit(net, pkts, cong_link_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) if (dests->local) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) tipc_loopback_trace(net, &localq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) tipc_sk_mcast_rcv(net, &localq, &inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) /* This queue should normally be empty by now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) __skb_queue_purge(pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) /* tipc_bcast_rcv - receive a broadcast packet, and deliver to rcv link
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) * RCU is locked, no other locks set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) struct tipc_msg *hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) struct sk_buff_head xmitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) __skb_queue_head_init(&xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) if (msg_mc_netid(hdr) != tipc_netid(net) || !tipc_link_is_up(l)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) tipc_bcast_lock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) if (msg_user(hdr) == BCAST_PROTOCOL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) rc = tipc_link_bc_nack_rcv(l, skb, &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) rc = tipc_link_rcv(l, skb, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) tipc_bcast_unlock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) tipc_bcbase_xmit(net, &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) /* Any socket wakeup messages ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) if (!skb_queue_empty(inputq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) tipc_sk_rcv(net, inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) /* tipc_bcast_ack_rcv - receive and handle a broadcast acknowledge
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) * RCU is locked, no other locks set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) struct tipc_msg *hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) u16 acked = msg_bcast_ack(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) struct sk_buff_head xmitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) /* Ignore bc acks sent by peer before bcast synch point was received */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) if (msg_bc_ack_invalid(hdr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) __skb_queue_head_init(&xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) tipc_bcast_lock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) tipc_link_bc_ack_rcv(l, acked, 0, NULL, &xmitq, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) tipc_bcast_unlock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) tipc_bcbase_xmit(net, &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) /* Any socket wakeup messages ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) if (!skb_queue_empty(inputq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) tipc_sk_rcv(net, inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) /* tipc_bcast_synch_rcv - check and update rcv link with peer's send state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) * RCU is locked, no other locks set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) int tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) struct tipc_msg *hdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) struct sk_buff_head *retrq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) struct tipc_gap_ack_blks *ga;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) struct sk_buff_head xmitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) __skb_queue_head_init(&xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) tipc_bcast_lock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (msg_type(hdr) != STATE_MSG) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) tipc_link_bc_init_rcv(l, hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) } else if (!msg_bc_ack_invalid(hdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) tipc_get_gap_ack_blks(&ga, l, hdr, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) if (!sysctl_tipc_bc_retruni)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) retrq = &xmitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) rc = tipc_link_bc_ack_rcv(l, msg_bcast_ack(hdr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) msg_bc_gap(hdr), ga, &xmitq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) retrq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) rc |= tipc_link_bc_sync_rcv(l, hdr, &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) tipc_bcast_unlock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) tipc_bcbase_xmit(net, &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) /* Any socket wakeup messages ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) if (!skb_queue_empty(inputq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) tipc_sk_rcv(net, inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) /* tipc_bcast_add_peer - add a peer node to broadcast link and bearer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) * RCU is locked, node lock is set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) void tipc_bcast_add_peer(struct net *net, struct tipc_link *uc_l,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) struct sk_buff_head *xmitq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) struct tipc_link *snd_l = tipc_bc_sndlink(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) tipc_bcast_lock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) tipc_link_add_bc_peer(snd_l, uc_l, xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) tipc_bcbase_select_primary(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) tipc_bcbase_calc_bc_threshold(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) tipc_bcast_unlock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) /* tipc_bcast_remove_peer - remove a peer node from broadcast link and bearer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) * RCU is locked, node lock is set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_l)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) struct tipc_link *snd_l = tipc_bc_sndlink(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) struct sk_buff_head xmitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) __skb_queue_head_init(&xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) tipc_bcast_lock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) tipc_link_remove_bc_peer(snd_l, rcv_l, &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) tipc_bcbase_select_primary(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) tipc_bcbase_calc_bc_threshold(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) tipc_bcast_unlock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) tipc_bcbase_xmit(net, &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) /* Any socket wakeup messages ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) if (!skb_queue_empty(inputq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) tipc_sk_rcv(net, inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) int tipc_bclink_reset_stats(struct net *net, struct tipc_link *l)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (!l)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) return -ENOPROTOOPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) tipc_bcast_lock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) tipc_link_reset_stats(l);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) tipc_bcast_unlock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) static int tipc_bc_link_set_queue_limits(struct net *net, u32 max_win)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) struct tipc_link *l = tipc_bc_sndlink(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) if (!l)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) return -ENOPROTOOPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) if (max_win < BCLINK_WIN_MIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) max_win = BCLINK_WIN_MIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) if (max_win > TIPC_MAX_LINK_WIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) tipc_bcast_lock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) tipc_link_set_queue_limits(l, tipc_link_min_win(l), max_win);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) tipc_bcast_unlock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) static int tipc_bc_link_set_broadcast_mode(struct net *net, u32 bc_mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) struct tipc_bc_base *bb = tipc_bc_base(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) switch (bc_mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) case BCLINK_MODE_BCAST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) if (!bb->bcast_support)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) return -ENOPROTOOPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) bb->force_bcast = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) bb->force_rcast = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) case BCLINK_MODE_RCAST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) if (!bb->rcast_support)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) return -ENOPROTOOPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) bb->force_bcast = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) bb->force_rcast = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) case BCLINK_MODE_SEL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) if (!bb->bcast_support || !bb->rcast_support)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) return -ENOPROTOOPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) bb->force_bcast = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) bb->force_rcast = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) static int tipc_bc_link_set_broadcast_ratio(struct net *net, u32 bc_ratio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) struct tipc_bc_base *bb = tipc_bc_base(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) if (!bb->bcast_support || !bb->rcast_support)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) return -ENOPROTOOPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) if (bc_ratio > 100 || bc_ratio <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) bb->rc_ratio = bc_ratio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) tipc_bcast_lock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) tipc_bcbase_calc_bc_threshold(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) tipc_bcast_unlock(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) u32 win;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) u32 bc_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) u32 bc_ratio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) if (!attrs[TIPC_NLA_LINK_PROP])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) if (!props[TIPC_NLA_PROP_WIN] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) !props[TIPC_NLA_PROP_BROADCAST] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) !props[TIPC_NLA_PROP_BROADCAST_RATIO]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) if (props[TIPC_NLA_PROP_BROADCAST]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) bc_mode = nla_get_u32(props[TIPC_NLA_PROP_BROADCAST]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) err = tipc_bc_link_set_broadcast_mode(net, bc_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) if (!err && props[TIPC_NLA_PROP_BROADCAST_RATIO]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) bc_ratio = nla_get_u32(props[TIPC_NLA_PROP_BROADCAST_RATIO]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) err = tipc_bc_link_set_broadcast_ratio(net, bc_ratio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) if (!err && props[TIPC_NLA_PROP_WIN]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) win = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) err = tipc_bc_link_set_queue_limits(net, win);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) int tipc_bcast_init(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) struct tipc_net *tn = tipc_net(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) struct tipc_bc_base *bb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) struct tipc_link *l = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) bb = kzalloc(sizeof(*bb), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) if (!bb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) goto enomem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) tn->bcbase = bb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) spin_lock_init(&tipc_net(net)->bclock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) if (!tipc_link_bc_create(net, 0, 0, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) one_page_mtu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) BCLINK_WIN_DEFAULT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) BCLINK_WIN_DEFAULT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) &bb->inputq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) &l))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) goto enomem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) bb->link = l;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) tn->bcl = l;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) bb->rc_ratio = 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) bb->rcast_support = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) enomem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) kfree(bb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) kfree(l);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) void tipc_bcast_stop(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) struct tipc_net *tn = net_generic(net, tipc_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) synchronize_net();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) kfree(tn->bcbase);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) kfree(tn->bcl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) void tipc_nlist_init(struct tipc_nlist *nl, u32 self)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) memset(nl, 0, sizeof(*nl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) INIT_LIST_HEAD(&nl->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) nl->self = self;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) void tipc_nlist_add(struct tipc_nlist *nl, u32 node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) if (node == nl->self)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) nl->local = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) else if (tipc_dest_push(&nl->list, node, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) nl->remote++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) void tipc_nlist_del(struct tipc_nlist *nl, u32 node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) if (node == nl->self)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) nl->local = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) else if (tipc_dest_del(&nl->list, node, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) nl->remote--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) void tipc_nlist_purge(struct tipc_nlist *nl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) tipc_dest_list_purge(&nl->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) nl->remote = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) nl->local = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) u32 tipc_bcast_get_mode(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) struct tipc_bc_base *bb = tipc_bc_base(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) if (bb->force_bcast)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) return BCLINK_MODE_BCAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) if (bb->force_rcast)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) return BCLINK_MODE_RCAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) if (bb->bcast_support && bb->rcast_support)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) return BCLINK_MODE_SEL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) u32 tipc_bcast_get_broadcast_ratio(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) struct tipc_bc_base *bb = tipc_bc_base(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) return bb->rc_ratio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) void tipc_mcast_filter_msg(struct net *net, struct sk_buff_head *defq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) struct sk_buff_head *inputq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) struct sk_buff *skb, *_skb, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) struct tipc_msg *hdr, *_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) bool match = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) u32 node, port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) skb = skb_peek(inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) if (likely(!msg_is_syn(hdr) && skb_queue_empty(defq)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) node = msg_orignode(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) if (node == tipc_own_addr(net))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) port = msg_origport(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) /* Has the twin SYN message already arrived ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) skb_queue_walk(defq, _skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) _hdr = buf_msg(_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) if (msg_orignode(_hdr) != node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) if (msg_origport(_hdr) != port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) match = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) if (!match) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) if (!msg_is_syn(hdr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) __skb_dequeue(inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) __skb_queue_tail(defq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) /* Deliver non-SYN message from other link, otherwise queue it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) if (!msg_is_syn(hdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) if (msg_is_rcast(hdr) != msg_is_rcast(_hdr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) __skb_dequeue(inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) __skb_queue_tail(defq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) /* Queue non-SYN/SYN message from same link */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) if (msg_is_rcast(hdr) == msg_is_rcast(_hdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) __skb_dequeue(inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) __skb_queue_tail(defq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) /* Matching SYN messages => return the one with data, if any */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) __skb_unlink(_skb, defq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) if (msg_data_sz(hdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) kfree_skb(_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) __skb_dequeue(inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) __skb_queue_tail(inputq, _skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) /* Deliver subsequent non-SYN messages from same peer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) skb_queue_walk_safe(defq, _skb, tmp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) _hdr = buf_msg(_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) if (msg_orignode(_hdr) != node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) if (msg_origport(_hdr) != port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) if (msg_is_syn(_hdr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) __skb_unlink(_skb, defq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) __skb_queue_tail(inputq, _skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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