mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Steven Rostedt (Google)](/assets/img/avatar_default.png)
Due to several bugs caused by timers being re-armed after they are shutdown and just before they are freed, a new state of timers was added called "shutdown". After a timer is set to this state, then it can no longer be re-armed. The following script was run to find all the trivial locations where del_timer() or del_timer_sync() is called in the same function that the object holding the timer is freed. It also ignores any locations where the timer->function is modified between the del_timer*() and the free(), as that is not considered a "trivial" case. This was created by using a coccinelle script and the following commands: $ cat timer.cocci @@ expression ptr, slab; identifier timer, rfield; @@ ( - del_timer(&ptr->timer); + timer_shutdown(&ptr->timer); | - del_timer_sync(&ptr->timer); + timer_shutdown_sync(&ptr->timer); ) ... when strict when != ptr->timer ( kfree_rcu(ptr, rfield); | kmem_cache_free(slab, ptr); | kfree(ptr); ) $ spatch timer.cocci . > /tmp/t.patch $ patch -p1 < /tmp/t.patch Link: https://lore.kernel.org/lkml/20221123201306.823305113@linutronix.de/ Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Acked-by: Pavel Machek <pavel@ucw.cz> [ LED ] Acked-by: Kalle Valo <kvalo@kernel.org> [ wireless ] Acked-by: Paolo Abeni <pabeni@redhat.com> [ networking ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
819 lines
22 KiB
C
819 lines
22 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright (c) 2020, Nikolay Aleksandrov <nikolay@nvidia.com>
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#include <linux/err.h>
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#include <linux/export.h>
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#include <linux/if_ether.h>
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#include <linux/igmp.h>
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#include <linux/in.h>
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#include <linux/jhash.h>
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#include <linux/kernel.h>
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#include <linux/log2.h>
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#include <linux/netdevice.h>
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#include <linux/netfilter_bridge.h>
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#include <linux/random.h>
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#include <linux/rculist.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/timer.h>
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#include <linux/inetdevice.h>
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#include <linux/mroute.h>
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#include <net/ip.h>
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#include <net/switchdev.h>
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#if IS_ENABLED(CONFIG_IPV6)
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#include <linux/icmpv6.h>
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#include <net/ipv6.h>
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#include <net/mld.h>
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#include <net/ip6_checksum.h>
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#include <net/addrconf.h>
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#endif
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#include "br_private.h"
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#include "br_private_mcast_eht.h"
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static bool br_multicast_del_eht_set_entry(struct net_bridge_port_group *pg,
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union net_bridge_eht_addr *src_addr,
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union net_bridge_eht_addr *h_addr);
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static void br_multicast_create_eht_set_entry(const struct net_bridge_mcast *brmctx,
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struct net_bridge_port_group *pg,
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union net_bridge_eht_addr *src_addr,
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union net_bridge_eht_addr *h_addr,
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int filter_mode,
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bool allow_zero_src);
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static struct net_bridge_group_eht_host *
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br_multicast_eht_host_lookup(struct net_bridge_port_group *pg,
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union net_bridge_eht_addr *h_addr)
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{
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struct rb_node *node = pg->eht_host_tree.rb_node;
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while (node) {
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struct net_bridge_group_eht_host *this;
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int result;
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this = rb_entry(node, struct net_bridge_group_eht_host,
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rb_node);
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result = memcmp(h_addr, &this->h_addr, sizeof(*h_addr));
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if (result < 0)
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node = node->rb_left;
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else if (result > 0)
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node = node->rb_right;
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else
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return this;
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}
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return NULL;
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}
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static int br_multicast_eht_host_filter_mode(struct net_bridge_port_group *pg,
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union net_bridge_eht_addr *h_addr)
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{
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struct net_bridge_group_eht_host *eht_host;
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eht_host = br_multicast_eht_host_lookup(pg, h_addr);
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if (!eht_host)
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return MCAST_INCLUDE;
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return eht_host->filter_mode;
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}
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static struct net_bridge_group_eht_set_entry *
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br_multicast_eht_set_entry_lookup(struct net_bridge_group_eht_set *eht_set,
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union net_bridge_eht_addr *h_addr)
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{
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struct rb_node *node = eht_set->entry_tree.rb_node;
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while (node) {
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struct net_bridge_group_eht_set_entry *this;
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int result;
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this = rb_entry(node, struct net_bridge_group_eht_set_entry,
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rb_node);
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result = memcmp(h_addr, &this->h_addr, sizeof(*h_addr));
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if (result < 0)
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node = node->rb_left;
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else if (result > 0)
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node = node->rb_right;
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else
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return this;
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}
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return NULL;
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}
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static struct net_bridge_group_eht_set *
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br_multicast_eht_set_lookup(struct net_bridge_port_group *pg,
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union net_bridge_eht_addr *src_addr)
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{
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struct rb_node *node = pg->eht_set_tree.rb_node;
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while (node) {
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struct net_bridge_group_eht_set *this;
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int result;
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this = rb_entry(node, struct net_bridge_group_eht_set,
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rb_node);
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result = memcmp(src_addr, &this->src_addr, sizeof(*src_addr));
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if (result < 0)
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node = node->rb_left;
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else if (result > 0)
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node = node->rb_right;
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else
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return this;
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}
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return NULL;
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}
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static void __eht_destroy_host(struct net_bridge_group_eht_host *eht_host)
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{
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WARN_ON(!hlist_empty(&eht_host->set_entries));
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br_multicast_eht_hosts_dec(eht_host->pg);
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rb_erase(&eht_host->rb_node, &eht_host->pg->eht_host_tree);
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RB_CLEAR_NODE(&eht_host->rb_node);
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kfree(eht_host);
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}
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static void br_multicast_destroy_eht_set_entry(struct net_bridge_mcast_gc *gc)
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{
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struct net_bridge_group_eht_set_entry *set_h;
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set_h = container_of(gc, struct net_bridge_group_eht_set_entry, mcast_gc);
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WARN_ON(!RB_EMPTY_NODE(&set_h->rb_node));
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timer_shutdown_sync(&set_h->timer);
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kfree(set_h);
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}
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static void br_multicast_destroy_eht_set(struct net_bridge_mcast_gc *gc)
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{
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struct net_bridge_group_eht_set *eht_set;
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eht_set = container_of(gc, struct net_bridge_group_eht_set, mcast_gc);
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WARN_ON(!RB_EMPTY_NODE(&eht_set->rb_node));
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WARN_ON(!RB_EMPTY_ROOT(&eht_set->entry_tree));
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timer_shutdown_sync(&eht_set->timer);
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kfree(eht_set);
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}
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static void __eht_del_set_entry(struct net_bridge_group_eht_set_entry *set_h)
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{
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struct net_bridge_group_eht_host *eht_host = set_h->h_parent;
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union net_bridge_eht_addr zero_addr;
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rb_erase(&set_h->rb_node, &set_h->eht_set->entry_tree);
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RB_CLEAR_NODE(&set_h->rb_node);
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hlist_del_init(&set_h->host_list);
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memset(&zero_addr, 0, sizeof(zero_addr));
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if (memcmp(&set_h->h_addr, &zero_addr, sizeof(zero_addr)))
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eht_host->num_entries--;
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hlist_add_head(&set_h->mcast_gc.gc_node, &set_h->br->mcast_gc_list);
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queue_work(system_long_wq, &set_h->br->mcast_gc_work);
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if (hlist_empty(&eht_host->set_entries))
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__eht_destroy_host(eht_host);
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}
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static void br_multicast_del_eht_set(struct net_bridge_group_eht_set *eht_set)
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{
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struct net_bridge_group_eht_set_entry *set_h;
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struct rb_node *node;
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while ((node = rb_first(&eht_set->entry_tree))) {
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set_h = rb_entry(node, struct net_bridge_group_eht_set_entry,
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rb_node);
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__eht_del_set_entry(set_h);
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}
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rb_erase(&eht_set->rb_node, &eht_set->pg->eht_set_tree);
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RB_CLEAR_NODE(&eht_set->rb_node);
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hlist_add_head(&eht_set->mcast_gc.gc_node, &eht_set->br->mcast_gc_list);
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queue_work(system_long_wq, &eht_set->br->mcast_gc_work);
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}
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void br_multicast_eht_clean_sets(struct net_bridge_port_group *pg)
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{
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struct net_bridge_group_eht_set *eht_set;
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struct rb_node *node;
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while ((node = rb_first(&pg->eht_set_tree))) {
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eht_set = rb_entry(node, struct net_bridge_group_eht_set,
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rb_node);
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br_multicast_del_eht_set(eht_set);
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}
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}
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static void br_multicast_eht_set_entry_expired(struct timer_list *t)
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{
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struct net_bridge_group_eht_set_entry *set_h = from_timer(set_h, t, timer);
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struct net_bridge *br = set_h->br;
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spin_lock(&br->multicast_lock);
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if (RB_EMPTY_NODE(&set_h->rb_node) || timer_pending(&set_h->timer))
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goto out;
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br_multicast_del_eht_set_entry(set_h->eht_set->pg,
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&set_h->eht_set->src_addr,
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&set_h->h_addr);
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out:
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spin_unlock(&br->multicast_lock);
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}
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static void br_multicast_eht_set_expired(struct timer_list *t)
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{
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struct net_bridge_group_eht_set *eht_set = from_timer(eht_set, t,
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timer);
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struct net_bridge *br = eht_set->br;
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spin_lock(&br->multicast_lock);
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if (RB_EMPTY_NODE(&eht_set->rb_node) || timer_pending(&eht_set->timer))
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goto out;
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br_multicast_del_eht_set(eht_set);
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out:
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spin_unlock(&br->multicast_lock);
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}
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static struct net_bridge_group_eht_host *
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__eht_lookup_create_host(struct net_bridge_port_group *pg,
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union net_bridge_eht_addr *h_addr,
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unsigned char filter_mode)
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{
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struct rb_node **link = &pg->eht_host_tree.rb_node, *parent = NULL;
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struct net_bridge_group_eht_host *eht_host;
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while (*link) {
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struct net_bridge_group_eht_host *this;
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int result;
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this = rb_entry(*link, struct net_bridge_group_eht_host,
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rb_node);
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result = memcmp(h_addr, &this->h_addr, sizeof(*h_addr));
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parent = *link;
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if (result < 0)
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link = &((*link)->rb_left);
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else if (result > 0)
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link = &((*link)->rb_right);
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else
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return this;
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}
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if (br_multicast_eht_hosts_over_limit(pg))
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return NULL;
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eht_host = kzalloc(sizeof(*eht_host), GFP_ATOMIC);
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if (!eht_host)
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return NULL;
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memcpy(&eht_host->h_addr, h_addr, sizeof(*h_addr));
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INIT_HLIST_HEAD(&eht_host->set_entries);
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eht_host->pg = pg;
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eht_host->filter_mode = filter_mode;
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rb_link_node(&eht_host->rb_node, parent, link);
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rb_insert_color(&eht_host->rb_node, &pg->eht_host_tree);
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br_multicast_eht_hosts_inc(pg);
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return eht_host;
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}
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static struct net_bridge_group_eht_set_entry *
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__eht_lookup_create_set_entry(struct net_bridge *br,
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struct net_bridge_group_eht_set *eht_set,
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struct net_bridge_group_eht_host *eht_host,
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bool allow_zero_src)
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{
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struct rb_node **link = &eht_set->entry_tree.rb_node, *parent = NULL;
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struct net_bridge_group_eht_set_entry *set_h;
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while (*link) {
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struct net_bridge_group_eht_set_entry *this;
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int result;
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this = rb_entry(*link, struct net_bridge_group_eht_set_entry,
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rb_node);
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result = memcmp(&eht_host->h_addr, &this->h_addr,
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sizeof(union net_bridge_eht_addr));
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parent = *link;
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if (result < 0)
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link = &((*link)->rb_left);
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else if (result > 0)
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link = &((*link)->rb_right);
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else
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return this;
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}
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/* always allow auto-created zero entry */
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if (!allow_zero_src && eht_host->num_entries >= PG_SRC_ENT_LIMIT)
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return NULL;
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set_h = kzalloc(sizeof(*set_h), GFP_ATOMIC);
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if (!set_h)
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return NULL;
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memcpy(&set_h->h_addr, &eht_host->h_addr,
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sizeof(union net_bridge_eht_addr));
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set_h->mcast_gc.destroy = br_multicast_destroy_eht_set_entry;
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set_h->eht_set = eht_set;
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set_h->h_parent = eht_host;
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set_h->br = br;
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timer_setup(&set_h->timer, br_multicast_eht_set_entry_expired, 0);
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hlist_add_head(&set_h->host_list, &eht_host->set_entries);
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rb_link_node(&set_h->rb_node, parent, link);
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rb_insert_color(&set_h->rb_node, &eht_set->entry_tree);
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/* we must not count the auto-created zero entry otherwise we won't be
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* able to track the full list of PG_SRC_ENT_LIMIT entries
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*/
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if (!allow_zero_src)
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eht_host->num_entries++;
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return set_h;
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}
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static struct net_bridge_group_eht_set *
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__eht_lookup_create_set(struct net_bridge_port_group *pg,
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union net_bridge_eht_addr *src_addr)
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{
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struct rb_node **link = &pg->eht_set_tree.rb_node, *parent = NULL;
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struct net_bridge_group_eht_set *eht_set;
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while (*link) {
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struct net_bridge_group_eht_set *this;
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int result;
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this = rb_entry(*link, struct net_bridge_group_eht_set,
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rb_node);
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result = memcmp(src_addr, &this->src_addr, sizeof(*src_addr));
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parent = *link;
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if (result < 0)
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link = &((*link)->rb_left);
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else if (result > 0)
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link = &((*link)->rb_right);
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else
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return this;
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}
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eht_set = kzalloc(sizeof(*eht_set), GFP_ATOMIC);
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if (!eht_set)
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return NULL;
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memcpy(&eht_set->src_addr, src_addr, sizeof(*src_addr));
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eht_set->mcast_gc.destroy = br_multicast_destroy_eht_set;
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eht_set->pg = pg;
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eht_set->br = pg->key.port->br;
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eht_set->entry_tree = RB_ROOT;
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timer_setup(&eht_set->timer, br_multicast_eht_set_expired, 0);
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rb_link_node(&eht_set->rb_node, parent, link);
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rb_insert_color(&eht_set->rb_node, &pg->eht_set_tree);
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return eht_set;
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}
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static void br_multicast_ip_src_to_eht_addr(const struct br_ip *src,
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union net_bridge_eht_addr *dest)
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{
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switch (src->proto) {
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case htons(ETH_P_IP):
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dest->ip4 = src->src.ip4;
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break;
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#if IS_ENABLED(CONFIG_IPV6)
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case htons(ETH_P_IPV6):
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memcpy(&dest->ip6, &src->src.ip6, sizeof(struct in6_addr));
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break;
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#endif
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}
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}
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static void br_eht_convert_host_filter_mode(const struct net_bridge_mcast *brmctx,
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struct net_bridge_port_group *pg,
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union net_bridge_eht_addr *h_addr,
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int filter_mode)
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{
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struct net_bridge_group_eht_host *eht_host;
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union net_bridge_eht_addr zero_addr;
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eht_host = br_multicast_eht_host_lookup(pg, h_addr);
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if (eht_host)
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eht_host->filter_mode = filter_mode;
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memset(&zero_addr, 0, sizeof(zero_addr));
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switch (filter_mode) {
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case MCAST_INCLUDE:
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br_multicast_del_eht_set_entry(pg, &zero_addr, h_addr);
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break;
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case MCAST_EXCLUDE:
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br_multicast_create_eht_set_entry(brmctx, pg, &zero_addr,
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h_addr, MCAST_EXCLUDE,
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true);
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break;
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}
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}
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|
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static void br_multicast_create_eht_set_entry(const struct net_bridge_mcast *brmctx,
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struct net_bridge_port_group *pg,
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union net_bridge_eht_addr *src_addr,
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union net_bridge_eht_addr *h_addr,
|
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int filter_mode,
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bool allow_zero_src)
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{
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struct net_bridge_group_eht_set_entry *set_h;
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struct net_bridge_group_eht_host *eht_host;
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struct net_bridge *br = pg->key.port->br;
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struct net_bridge_group_eht_set *eht_set;
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union net_bridge_eht_addr zero_addr;
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memset(&zero_addr, 0, sizeof(zero_addr));
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if (!allow_zero_src && !memcmp(src_addr, &zero_addr, sizeof(zero_addr)))
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return;
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|
|
eht_set = __eht_lookup_create_set(pg, src_addr);
|
|
if (!eht_set)
|
|
return;
|
|
|
|
eht_host = __eht_lookup_create_host(pg, h_addr, filter_mode);
|
|
if (!eht_host)
|
|
goto fail_host;
|
|
|
|
set_h = __eht_lookup_create_set_entry(br, eht_set, eht_host,
|
|
allow_zero_src);
|
|
if (!set_h)
|
|
goto fail_set_entry;
|
|
|
|
mod_timer(&set_h->timer, jiffies + br_multicast_gmi(brmctx));
|
|
mod_timer(&eht_set->timer, jiffies + br_multicast_gmi(brmctx));
|
|
|
|
return;
|
|
|
|
fail_set_entry:
|
|
if (hlist_empty(&eht_host->set_entries))
|
|
__eht_destroy_host(eht_host);
|
|
fail_host:
|
|
if (RB_EMPTY_ROOT(&eht_set->entry_tree))
|
|
br_multicast_del_eht_set(eht_set);
|
|
}
|
|
|
|
static bool br_multicast_del_eht_set_entry(struct net_bridge_port_group *pg,
|
|
union net_bridge_eht_addr *src_addr,
|
|
union net_bridge_eht_addr *h_addr)
|
|
{
|
|
struct net_bridge_group_eht_set_entry *set_h;
|
|
struct net_bridge_group_eht_set *eht_set;
|
|
bool set_deleted = false;
|
|
|
|
eht_set = br_multicast_eht_set_lookup(pg, src_addr);
|
|
if (!eht_set)
|
|
goto out;
|
|
|
|
set_h = br_multicast_eht_set_entry_lookup(eht_set, h_addr);
|
|
if (!set_h)
|
|
goto out;
|
|
|
|
__eht_del_set_entry(set_h);
|
|
|
|
if (RB_EMPTY_ROOT(&eht_set->entry_tree)) {
|
|
br_multicast_del_eht_set(eht_set);
|
|
set_deleted = true;
|
|
}
|
|
|
|
out:
|
|
return set_deleted;
|
|
}
|
|
|
|
static void br_multicast_del_eht_host(struct net_bridge_port_group *pg,
|
|
union net_bridge_eht_addr *h_addr)
|
|
{
|
|
struct net_bridge_group_eht_set_entry *set_h;
|
|
struct net_bridge_group_eht_host *eht_host;
|
|
struct hlist_node *tmp;
|
|
|
|
eht_host = br_multicast_eht_host_lookup(pg, h_addr);
|
|
if (!eht_host)
|
|
return;
|
|
|
|
hlist_for_each_entry_safe(set_h, tmp, &eht_host->set_entries, host_list)
|
|
br_multicast_del_eht_set_entry(set_h->eht_set->pg,
|
|
&set_h->eht_set->src_addr,
|
|
&set_h->h_addr);
|
|
}
|
|
|
|
/* create new set entries from reports */
|
|
static void __eht_create_set_entries(const struct net_bridge_mcast *brmctx,
|
|
struct net_bridge_port_group *pg,
|
|
union net_bridge_eht_addr *h_addr,
|
|
void *srcs,
|
|
u32 nsrcs,
|
|
size_t addr_size,
|
|
int filter_mode)
|
|
{
|
|
union net_bridge_eht_addr eht_src_addr;
|
|
u32 src_idx;
|
|
|
|
memset(&eht_src_addr, 0, sizeof(eht_src_addr));
|
|
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
|
|
memcpy(&eht_src_addr, srcs + (src_idx * addr_size), addr_size);
|
|
br_multicast_create_eht_set_entry(brmctx, pg, &eht_src_addr,
|
|
h_addr, filter_mode,
|
|
false);
|
|
}
|
|
}
|
|
|
|
/* delete existing set entries and their (S,G) entries if they were the last */
|
|
static bool __eht_del_set_entries(struct net_bridge_port_group *pg,
|
|
union net_bridge_eht_addr *h_addr,
|
|
void *srcs,
|
|
u32 nsrcs,
|
|
size_t addr_size)
|
|
{
|
|
union net_bridge_eht_addr eht_src_addr;
|
|
struct net_bridge_group_src *src_ent;
|
|
bool changed = false;
|
|
struct br_ip src_ip;
|
|
u32 src_idx;
|
|
|
|
memset(&eht_src_addr, 0, sizeof(eht_src_addr));
|
|
memset(&src_ip, 0, sizeof(src_ip));
|
|
src_ip.proto = pg->key.addr.proto;
|
|
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
|
|
memcpy(&eht_src_addr, srcs + (src_idx * addr_size), addr_size);
|
|
if (!br_multicast_del_eht_set_entry(pg, &eht_src_addr, h_addr))
|
|
continue;
|
|
memcpy(&src_ip, srcs + (src_idx * addr_size), addr_size);
|
|
src_ent = br_multicast_find_group_src(pg, &src_ip);
|
|
if (!src_ent)
|
|
continue;
|
|
br_multicast_del_group_src(src_ent, true);
|
|
changed = true;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
static bool br_multicast_eht_allow(const struct net_bridge_mcast *brmctx,
|
|
struct net_bridge_port_group *pg,
|
|
union net_bridge_eht_addr *h_addr,
|
|
void *srcs,
|
|
u32 nsrcs,
|
|
size_t addr_size)
|
|
{
|
|
bool changed = false;
|
|
|
|
switch (br_multicast_eht_host_filter_mode(pg, h_addr)) {
|
|
case MCAST_INCLUDE:
|
|
__eht_create_set_entries(brmctx, pg, h_addr, srcs, nsrcs,
|
|
addr_size, MCAST_INCLUDE);
|
|
break;
|
|
case MCAST_EXCLUDE:
|
|
changed = __eht_del_set_entries(pg, h_addr, srcs, nsrcs,
|
|
addr_size);
|
|
break;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
static bool br_multicast_eht_block(const struct net_bridge_mcast *brmctx,
|
|
struct net_bridge_port_group *pg,
|
|
union net_bridge_eht_addr *h_addr,
|
|
void *srcs,
|
|
u32 nsrcs,
|
|
size_t addr_size)
|
|
{
|
|
bool changed = false;
|
|
|
|
switch (br_multicast_eht_host_filter_mode(pg, h_addr)) {
|
|
case MCAST_INCLUDE:
|
|
changed = __eht_del_set_entries(pg, h_addr, srcs, nsrcs,
|
|
addr_size);
|
|
break;
|
|
case MCAST_EXCLUDE:
|
|
__eht_create_set_entries(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
|
|
MCAST_EXCLUDE);
|
|
break;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
/* flush_entries is true when changing mode */
|
|
static bool __eht_inc_exc(const struct net_bridge_mcast *brmctx,
|
|
struct net_bridge_port_group *pg,
|
|
union net_bridge_eht_addr *h_addr,
|
|
void *srcs,
|
|
u32 nsrcs,
|
|
size_t addr_size,
|
|
unsigned char filter_mode,
|
|
bool to_report)
|
|
{
|
|
bool changed = false, flush_entries = to_report;
|
|
union net_bridge_eht_addr eht_src_addr;
|
|
|
|
if (br_multicast_eht_host_filter_mode(pg, h_addr) != filter_mode)
|
|
flush_entries = true;
|
|
|
|
memset(&eht_src_addr, 0, sizeof(eht_src_addr));
|
|
/* if we're changing mode del host and its entries */
|
|
if (flush_entries)
|
|
br_multicast_del_eht_host(pg, h_addr);
|
|
__eht_create_set_entries(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
|
|
filter_mode);
|
|
/* we can be missing sets only if we've deleted some entries */
|
|
if (flush_entries) {
|
|
struct net_bridge_group_eht_set *eht_set;
|
|
struct net_bridge_group_src *src_ent;
|
|
struct hlist_node *tmp;
|
|
|
|
hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) {
|
|
br_multicast_ip_src_to_eht_addr(&src_ent->addr,
|
|
&eht_src_addr);
|
|
if (!br_multicast_eht_set_lookup(pg, &eht_src_addr)) {
|
|
br_multicast_del_group_src(src_ent, true);
|
|
changed = true;
|
|
continue;
|
|
}
|
|
/* this is an optimization for TO_INCLUDE where we lower
|
|
* the set's timeout to LMQT to catch timeout hosts:
|
|
* - host A (timing out): set entries X, Y
|
|
* - host B: set entry Z (new from current TO_INCLUDE)
|
|
* sends BLOCK Z after LMQT but host A's EHT
|
|
* entries still exist (unless lowered to LMQT
|
|
* so they can timeout with the S,Gs)
|
|
* => we wait another LMQT, when we can just delete the
|
|
* group immediately
|
|
*/
|
|
if (!(src_ent->flags & BR_SGRP_F_SEND) ||
|
|
filter_mode != MCAST_INCLUDE ||
|
|
!to_report)
|
|
continue;
|
|
eht_set = br_multicast_eht_set_lookup(pg,
|
|
&eht_src_addr);
|
|
if (!eht_set)
|
|
continue;
|
|
mod_timer(&eht_set->timer, jiffies + br_multicast_lmqt(brmctx));
|
|
}
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
static bool br_multicast_eht_inc(const struct net_bridge_mcast *brmctx,
|
|
struct net_bridge_port_group *pg,
|
|
union net_bridge_eht_addr *h_addr,
|
|
void *srcs,
|
|
u32 nsrcs,
|
|
size_t addr_size,
|
|
bool to_report)
|
|
{
|
|
bool changed;
|
|
|
|
changed = __eht_inc_exc(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
|
|
MCAST_INCLUDE, to_report);
|
|
br_eht_convert_host_filter_mode(brmctx, pg, h_addr, MCAST_INCLUDE);
|
|
|
|
return changed;
|
|
}
|
|
|
|
static bool br_multicast_eht_exc(const struct net_bridge_mcast *brmctx,
|
|
struct net_bridge_port_group *pg,
|
|
union net_bridge_eht_addr *h_addr,
|
|
void *srcs,
|
|
u32 nsrcs,
|
|
size_t addr_size,
|
|
bool to_report)
|
|
{
|
|
bool changed;
|
|
|
|
changed = __eht_inc_exc(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
|
|
MCAST_EXCLUDE, to_report);
|
|
br_eht_convert_host_filter_mode(brmctx, pg, h_addr, MCAST_EXCLUDE);
|
|
|
|
return changed;
|
|
}
|
|
|
|
static bool __eht_ip4_handle(const struct net_bridge_mcast *brmctx,
|
|
struct net_bridge_port_group *pg,
|
|
union net_bridge_eht_addr *h_addr,
|
|
void *srcs,
|
|
u32 nsrcs,
|
|
int grec_type)
|
|
{
|
|
bool changed = false, to_report = false;
|
|
|
|
switch (grec_type) {
|
|
case IGMPV3_ALLOW_NEW_SOURCES:
|
|
br_multicast_eht_allow(brmctx, pg, h_addr, srcs, nsrcs,
|
|
sizeof(__be32));
|
|
break;
|
|
case IGMPV3_BLOCK_OLD_SOURCES:
|
|
changed = br_multicast_eht_block(brmctx, pg, h_addr, srcs, nsrcs,
|
|
sizeof(__be32));
|
|
break;
|
|
case IGMPV3_CHANGE_TO_INCLUDE:
|
|
to_report = true;
|
|
fallthrough;
|
|
case IGMPV3_MODE_IS_INCLUDE:
|
|
changed = br_multicast_eht_inc(brmctx, pg, h_addr, srcs, nsrcs,
|
|
sizeof(__be32), to_report);
|
|
break;
|
|
case IGMPV3_CHANGE_TO_EXCLUDE:
|
|
to_report = true;
|
|
fallthrough;
|
|
case IGMPV3_MODE_IS_EXCLUDE:
|
|
changed = br_multicast_eht_exc(brmctx, pg, h_addr, srcs, nsrcs,
|
|
sizeof(__be32), to_report);
|
|
break;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static bool __eht_ip6_handle(const struct net_bridge_mcast *brmctx,
|
|
struct net_bridge_port_group *pg,
|
|
union net_bridge_eht_addr *h_addr,
|
|
void *srcs,
|
|
u32 nsrcs,
|
|
int grec_type)
|
|
{
|
|
bool changed = false, to_report = false;
|
|
|
|
switch (grec_type) {
|
|
case MLD2_ALLOW_NEW_SOURCES:
|
|
br_multicast_eht_allow(brmctx, pg, h_addr, srcs, nsrcs,
|
|
sizeof(struct in6_addr));
|
|
break;
|
|
case MLD2_BLOCK_OLD_SOURCES:
|
|
changed = br_multicast_eht_block(brmctx, pg, h_addr, srcs, nsrcs,
|
|
sizeof(struct in6_addr));
|
|
break;
|
|
case MLD2_CHANGE_TO_INCLUDE:
|
|
to_report = true;
|
|
fallthrough;
|
|
case MLD2_MODE_IS_INCLUDE:
|
|
changed = br_multicast_eht_inc(brmctx, pg, h_addr, srcs, nsrcs,
|
|
sizeof(struct in6_addr),
|
|
to_report);
|
|
break;
|
|
case MLD2_CHANGE_TO_EXCLUDE:
|
|
to_report = true;
|
|
fallthrough;
|
|
case MLD2_MODE_IS_EXCLUDE:
|
|
changed = br_multicast_eht_exc(brmctx, pg, h_addr, srcs, nsrcs,
|
|
sizeof(struct in6_addr),
|
|
to_report);
|
|
break;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
#endif
|
|
|
|
/* true means an entry was deleted */
|
|
bool br_multicast_eht_handle(const struct net_bridge_mcast *brmctx,
|
|
struct net_bridge_port_group *pg,
|
|
void *h_addr,
|
|
void *srcs,
|
|
u32 nsrcs,
|
|
size_t addr_size,
|
|
int grec_type)
|
|
{
|
|
bool eht_enabled = !!(pg->key.port->flags & BR_MULTICAST_FAST_LEAVE);
|
|
union net_bridge_eht_addr eht_host_addr;
|
|
bool changed = false;
|
|
|
|
if (!eht_enabled)
|
|
goto out;
|
|
|
|
memset(&eht_host_addr, 0, sizeof(eht_host_addr));
|
|
memcpy(&eht_host_addr, h_addr, addr_size);
|
|
if (addr_size == sizeof(__be32))
|
|
changed = __eht_ip4_handle(brmctx, pg, &eht_host_addr, srcs,
|
|
nsrcs, grec_type);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
else
|
|
changed = __eht_ip6_handle(brmctx, pg, &eht_host_addr, srcs,
|
|
nsrcs, grec_type);
|
|
#endif
|
|
|
|
out:
|
|
return changed;
|
|
}
|
|
|
|
int br_multicast_eht_set_hosts_limit(struct net_bridge_port *p,
|
|
u32 eht_hosts_limit)
|
|
{
|
|
struct net_bridge *br = p->br;
|
|
|
|
if (!eht_hosts_limit)
|
|
return -EINVAL;
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
p->multicast_eht_hosts_limit = eht_hosts_limit;
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
|
|
return 0;
|
|
}
|