^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * net/tipc/subscr.c: TIPC network topology service
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2000-2017, Ericsson AB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2005-2007, 2010-2013, Wind River Systems
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Redistribution and use in source and binary forms, with or without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * modification, are permitted provided that the following conditions are met:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * 1. Redistributions of source code must retain the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * notice, this list of conditions and the following disclaimer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * 2. Redistributions in binary form must reproduce the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * notice, this list of conditions and the following disclaimer in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * documentation and/or other materials provided with the distribution.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * 3. Neither the names of the copyright holders nor the names of its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * contributors may be used to endorse or promote products derived from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * this software without specific prior written permission.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Alternatively, this software may be distributed under the terms of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * GNU General Public License ("GPL") version 2 as published by the Free
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * 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 34) * POSSIBILITY OF SUCH DAMAGE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include "core.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include "name_table.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include "subscr.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static void tipc_sub_send_event(struct tipc_subscription *sub,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u32 found_lower, u32 found_upper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) u32 event, u32 port, u32 node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct tipc_event *evt = &sub->evt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if (sub->inactive)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) tipc_evt_write(evt, event, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) tipc_evt_write(evt, found_lower, found_lower);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) tipc_evt_write(evt, found_upper, found_upper);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) tipc_evt_write(evt, port.ref, port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) tipc_evt_write(evt, port.node, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) tipc_topsrv_queue_evt(sub->net, sub->conid, event, evt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * tipc_sub_check_overlap - test for subscription overlap with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * given values
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * Returns 1 if there is overlap, otherwise 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) int tipc_sub_check_overlap(struct tipc_name_seq *seq, u32 found_lower,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) u32 found_upper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (found_lower < seq->lower)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) found_lower = seq->lower;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (found_upper > seq->upper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) found_upper = seq->upper;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (found_lower > found_upper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) void tipc_sub_report_overlap(struct tipc_subscription *sub,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) u32 found_lower, u32 found_upper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) u32 event, u32 port, u32 node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) u32 scope, int must)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct tipc_subscr *s = &sub->evt.s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) u32 filter = tipc_sub_read(s, filter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct tipc_name_seq seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) seq.type = tipc_sub_read(s, seq.type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) seq.lower = tipc_sub_read(s, seq.lower);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) seq.upper = tipc_sub_read(s, seq.upper);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (!tipc_sub_check_overlap(&seq, found_lower, found_upper))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (!must && !(filter & TIPC_SUB_PORTS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (filter & TIPC_SUB_CLUSTER_SCOPE && scope == TIPC_NODE_SCOPE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (filter & TIPC_SUB_NODE_SCOPE && scope != TIPC_NODE_SCOPE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) spin_lock(&sub->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) tipc_sub_send_event(sub, found_lower, found_upper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) event, port, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) spin_unlock(&sub->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static void tipc_sub_timeout(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct tipc_subscription *sub = from_timer(sub, t, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct tipc_subscr *s = &sub->evt.s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) spin_lock(&sub->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) tipc_sub_send_event(sub, s->seq.lower, s->seq.upper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) TIPC_SUBSCR_TIMEOUT, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) sub->inactive = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) spin_unlock(&sub->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static void tipc_sub_kref_release(struct kref *kref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) kfree(container_of(kref, struct tipc_subscription, kref));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) void tipc_sub_put(struct tipc_subscription *subscription)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) kref_put(&subscription->kref, tipc_sub_kref_release);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) void tipc_sub_get(struct tipc_subscription *subscription)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) kref_get(&subscription->kref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct tipc_subscription *tipc_sub_subscribe(struct net *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct tipc_subscr *s,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) int conid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) u32 filter = tipc_sub_read(s, filter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct tipc_subscription *sub;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) u32 timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if ((filter & TIPC_SUB_PORTS && filter & TIPC_SUB_SERVICE) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) (tipc_sub_read(s, seq.lower) > tipc_sub_read(s, seq.upper))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) pr_warn("Subscription rejected, illegal request\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) sub = kmalloc(sizeof(*sub), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (!sub) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) pr_warn("Subscription rejected, no memory\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) INIT_LIST_HEAD(&sub->service_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) INIT_LIST_HEAD(&sub->sub_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) sub->net = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) sub->conid = conid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) sub->inactive = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) memcpy(&sub->evt.s, s, sizeof(*s));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) spin_lock_init(&sub->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) kref_init(&sub->kref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (!tipc_nametbl_subscribe(sub)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) kfree(sub);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) timer_setup(&sub->timer, tipc_sub_timeout, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) timeout = tipc_sub_read(&sub->evt.s, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) if (timeout != TIPC_WAIT_FOREVER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) mod_timer(&sub->timer, jiffies + msecs_to_jiffies(timeout));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return sub;
^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) void tipc_sub_unsubscribe(struct tipc_subscription *sub)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) tipc_nametbl_unsubscribe(sub);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (sub->evt.s.timeout != TIPC_WAIT_FOREVER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) del_timer_sync(&sub->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) list_del(&sub->sub_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) tipc_sub_put(sub);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags