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authorLinus Torvalds <torvalds@linux-foundation.org>2015-06-24 16:49:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-06-24 16:49:49 -0700
commite0456717e483bb8a9431b80a5bdc99a928b9b003 (patch)
tree5eb5add2bafd1f20326d70f5cb3b711d00a40b10 /net/bridge
parent98ec21a01896751b673b6c731ca8881daa8b2c6d (diff)
parent1ea2d020ba477cb7011a7174e8501a9e04a325d4 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller: 1) Add TX fast path in mac80211, from Johannes Berg. 2) Add TSO/GRO support to ibmveth, from Thomas Falcon 3) Move away from cached routes in ipv6, just like ipv4, from Martin KaFai Lau. 4) Lots of new rhashtable tests, from Thomas Graf. 5) Run ingress qdisc lockless, from Alexei Starovoitov. 6) Allow servers to fetch TCP packet headers for SYN packets of new connections, for fingerprinting. From Eric Dumazet. 7) Add mode parameter to pktgen, for testing receive. From Alexei Starovoitov. 8) Cache access optimizations via simplifications of build_skb(), from Alexander Duyck. 9) Move page frag allocator under mm/, also from Alexander. 10) Add xmit_more support to hv_netvsc, from KY Srinivasan. 11) Add a counter guard in case we try to perform endless reclassify loops in the packet scheduler. 12) Extern flow dissector to be programmable and use it in new "Flower" classifier. From Jiri Pirko. 13) AF_PACKET fanout rollover fixes, performance improvements, and new statistics. From Willem de Bruijn. 14) Add netdev driver for GENEVE tunnels, from John W Linville. 15) Add ingress netfilter hooks and filtering, from Pablo Neira Ayuso. 16) Fix handling of epoll edge triggers in TCP, from Eric Dumazet. 17) Add an ECN retry fallback for the initial TCP handshake, from Daniel Borkmann. 18) Add tail call support to BPF, from Alexei Starovoitov. 19) Add several pktgen helper scripts, from Jesper Dangaard Brouer. 20) Add zerocopy support to AF_UNIX, from Hannes Frederic Sowa. 21) Favor even port numbers for allocation to connect() requests, and odd port numbers for bind(0), in an effort to help avoid ip_local_port_range exhaustion. From Eric Dumazet. 22) Add Cavium ThunderX driver, from Sunil Goutham. 23) Allow bpf programs to access skb_iif and dev->ifindex SKB metadata, from Alexei Starovoitov. 24) Add support for T6 chips in cxgb4vf driver, from Hariprasad Shenai. 25) Double TCP Small Queues default to 256K to accomodate situations like the XEN driver and wireless aggregation. From Wei Liu. 26) Add more entropy inputs to flow dissector, from Tom Herbert. 27) Add CDG congestion control algorithm to TCP, from Kenneth Klette Jonassen. 28) Convert ipset over to RCU locking, from Jozsef Kadlecsik. 29) Track and act upon link status of ipv4 route nexthops, from Andy Gospodarek. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1670 commits) bridge: vlan: flush the dynamically learned entries on port vlan delete bridge: multicast: add a comment to br_port_state_selection about blocking state net: inet_diag: export IPV6_V6ONLY sockopt stmmac: troubleshoot unexpected bits in des0 & des1 net: ipv4 sysctl option to ignore routes when nexthop link is down net: track link-status of ipv4 nexthops net: switchdev: ignore unsupported bridge flags net: Cavium: Fix MAC address setting in shutdown state drivers: net: xgene: fix for ACPI support without ACPI ip: report the original address of ICMP messages net/mlx5e: Prefetch skb data on RX net/mlx5e: Pop cq outside mlx5e_get_cqe net/mlx5e: Remove mlx5e_cq.sqrq back-pointer net/mlx5e: Remove extra spaces net/mlx5e: Avoid TX CQE generation if more xmit packets expected net/mlx5e: Avoid redundant dev_kfree_skb() upon NOP completion net/mlx5e: Remove re-assignment of wq type in mlx5e_enable_rq() net/mlx5e: Use skb_shinfo(skb)->gso_segs rather than counting them net/mlx5e: Static mapping of netdev priv resources to/from netdev TX queues net/mlx4_en: Use HW counters for rx/tx bytes/packets in PF device ...
Diffstat (limited to 'net/bridge')
-rw-r--r--net/bridge/Makefile2
-rw-r--r--net/bridge/br.c22
-rw-r--r--net/bridge/br_fdb.c38
-rw-r--r--net/bridge/br_if.c4
-rw-r--r--net/bridge/br_ioctl.c2
-rw-r--r--net/bridge/br_multicast.c266
-rw-r--r--net/bridge/br_netfilter_hooks.c (renamed from net/bridge/br_netfilter.c)312
-rw-r--r--net/bridge/br_netfilter_ipv6.c245
-rw-r--r--net/bridge/br_netlink.c24
-rw-r--r--net/bridge/br_private.h13
-rw-r--r--net/bridge/br_stp.c13
-rw-r--r--net/bridge/br_stp_if.c6
-rw-r--r--net/bridge/br_sysfs_if.c2
-rw-r--r--net/bridge/br_vlan.c60
-rw-r--r--net/bridge/netfilter/ebt_stp.c6
-rw-r--r--net/bridge/netfilter/ebtables.c2
16 files changed, 531 insertions, 486 deletions
diff --git a/net/bridge/Makefile b/net/bridge/Makefile
index fd7ee03c59b3..a1cda5d4718d 100644
--- a/net/bridge/Makefile
+++ b/net/bridge/Makefile
@@ -12,6 +12,8 @@ bridge-$(CONFIG_SYSFS) += br_sysfs_if.o br_sysfs_br.o
bridge-$(subst m,y,$(CONFIG_BRIDGE_NETFILTER)) += br_nf_core.o
+br_netfilter-y := br_netfilter_hooks.o
+br_netfilter-$(subst m,y,$(CONFIG_IPV6)) += br_netfilter_ipv6.o
obj-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o
bridge-$(CONFIG_BRIDGE_IGMP_SNOOPING) += br_multicast.o br_mdb.o
diff --git a/net/bridge/br.c b/net/bridge/br.c
index 02c24cf63c34..a1abe4936fe1 100644
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -121,13 +121,13 @@ static struct notifier_block br_device_notifier = {
.notifier_call = br_device_event
};
-static int br_netdev_switch_event(struct notifier_block *unused,
- unsigned long event, void *ptr)
+static int br_switchdev_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
{
- struct net_device *dev = netdev_switch_notifier_info_to_dev(ptr);
+ struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
struct net_bridge_port *p;
struct net_bridge *br;
- struct netdev_switch_notifier_fdb_info *fdb_info;
+ struct switchdev_notifier_fdb_info *fdb_info;
int err = NOTIFY_DONE;
rtnl_lock();
@@ -138,14 +138,14 @@ static int br_netdev_switch_event(struct notifier_block *unused,
br = p->br;
switch (event) {
- case NETDEV_SWITCH_FDB_ADD:
+ case SWITCHDEV_FDB_ADD:
fdb_info = ptr;
err = br_fdb_external_learn_add(br, p, fdb_info->addr,
fdb_info->vid);
if (err)
err = notifier_from_errno(err);
break;
- case NETDEV_SWITCH_FDB_DEL:
+ case SWITCHDEV_FDB_DEL:
fdb_info = ptr;
err = br_fdb_external_learn_del(br, p, fdb_info->addr,
fdb_info->vid);
@@ -159,8 +159,8 @@ out:
return err;
}
-static struct notifier_block br_netdev_switch_notifier = {
- .notifier_call = br_netdev_switch_event,
+static struct notifier_block br_switchdev_notifier = {
+ .notifier_call = br_switchdev_event,
};
static void __net_exit br_net_exit(struct net *net)
@@ -214,7 +214,7 @@ static int __init br_init(void)
if (err)
goto err_out3;
- err = register_netdev_switch_notifier(&br_netdev_switch_notifier);
+ err = register_switchdev_notifier(&br_switchdev_notifier);
if (err)
goto err_out4;
@@ -235,7 +235,7 @@ static int __init br_init(void)
return 0;
err_out5:
- unregister_netdev_switch_notifier(&br_netdev_switch_notifier);
+ unregister_switchdev_notifier(&br_switchdev_notifier);
err_out4:
unregister_netdevice_notifier(&br_device_notifier);
err_out3:
@@ -253,7 +253,7 @@ static void __exit br_deinit(void)
{
stp_proto_unregister(&br_stp_proto);
br_netlink_fini();
- unregister_netdev_switch_notifier(&br_netdev_switch_notifier);
+ unregister_switchdev_notifier(&br_switchdev_notifier);
unregister_netdevice_notifier(&br_device_notifier);
brioctl_set(NULL);
unregister_pernet_subsys(&br_net_ops);
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index 659fb96672e4..9e9875da0a4f 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -24,6 +24,7 @@
#include <linux/atomic.h>
#include <asm/unaligned.h>
#include <linux/if_vlan.h>
+#include <net/switchdev.h>
#include "br_private.h"
static struct kmem_cache *br_fdb_cache __read_mostly;
@@ -130,11 +131,27 @@ static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr)
}
}
+static void fdb_del_external_learn(struct net_bridge_fdb_entry *f)
+{
+ struct switchdev_obj obj = {
+ .id = SWITCHDEV_OBJ_PORT_FDB,
+ .u.fdb = {
+ .addr = f->addr.addr,
+ .vid = f->vlan_id,
+ },
+ };
+
+ switchdev_port_obj_del(f->dst->dev, &obj);
+}
+
static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f)
{
if (f->is_static)
fdb_del_hw_addr(br, f->addr.addr);
+ if (f->added_by_external_learn)
+ fdb_del_external_learn(f);
+
hlist_del_rcu(&f->hlist);
fdb_notify(br, f, RTM_DELNEIGH);
call_rcu(&f->rcu, fdb_rcu_free);
@@ -313,9 +330,11 @@ void br_fdb_flush(struct net_bridge *br)
/* Flush all entries referring to a specific port.
* if do_all is set also flush static entries
+ * if vid is set delete all entries that match the vlan_id
*/
void br_fdb_delete_by_port(struct net_bridge *br,
const struct net_bridge_port *p,
+ u16 vid,
int do_all)
{
int i;
@@ -330,8 +349,9 @@ void br_fdb_delete_by_port(struct net_bridge *br,
if (f->dst != p)
continue;
- if (f->is_static && !do_all)
- continue;
+ if (!do_all)
+ if (f->is_static || (vid && f->vlan_id != vid))
+ continue;
if (f->is_local)
fdb_delete_local(br, p, f);
@@ -736,6 +756,12 @@ static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr,
struct net_bridge_fdb_entry *fdb;
bool modified = false;
+ /* If the port cannot learn allow only local and static entries */
+ if (!(state & NUD_PERMANENT) && !(state & NUD_NOARP) &&
+ !(source->state == BR_STATE_LEARNING ||
+ source->state == BR_STATE_FORWARDING))
+ return -EPERM;
+
fdb = fdb_find(head, addr, vid);
if (fdb == NULL) {
if (!(flags & NLM_F_CREATE))
@@ -867,13 +893,15 @@ out:
return err;
}
-static int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vlan)
+static int fdb_delete_by_addr_and_port(struct net_bridge_port *p,
+ const u8 *addr, u16 vlan)
{
+ struct net_bridge *br = p->br;
struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)];
struct net_bridge_fdb_entry *fdb;
fdb = fdb_find(head, addr, vlan);
- if (!fdb)
+ if (!fdb || fdb->dst != p)
return -ENOENT;
fdb_delete(br, fdb);
@@ -886,7 +914,7 @@ static int __br_fdb_delete(struct net_bridge_port *p,
int err;
spin_lock_bh(&p->br->hash_lock);
- err = fdb_delete_by_addr(p->br, addr, vid);
+ err = fdb_delete_by_addr_and_port(p, addr, vid);
spin_unlock_bh(&p->br->hash_lock);
return err;
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 1849d96b3c91..a538cb1199a3 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -249,7 +249,7 @@ static void del_nbp(struct net_bridge_port *p)
list_del_rcu(&p->list);
nbp_vlan_flush(p);
- br_fdb_delete_by_port(br, p, 1);
+ br_fdb_delete_by_port(br, p, 0, 1);
nbp_update_port_count(br);
netdev_upper_dev_unlink(dev, br->dev);
@@ -278,7 +278,7 @@ void br_dev_delete(struct net_device *dev, struct list_head *head)
del_nbp(p);
}
- br_fdb_delete_by_port(br, NULL, 1);
+ br_fdb_delete_by_port(br, NULL, 0, 1);
br_vlan_flush(br);
del_timer_sync(&br->gc_timer);
diff --git a/net/bridge/br_ioctl.c b/net/bridge/br_ioctl.c
index a9a4a1b7863d..8d423bc649b9 100644
--- a/net/bridge/br_ioctl.c
+++ b/net/bridge/br_ioctl.c
@@ -247,9 +247,7 @@ static int old_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
return -EPERM;
- spin_lock_bh(&br->lock);
br_stp_set_bridge_priority(br, args[1]);
- spin_unlock_bh(&br->lock);
return 0;
case BRCTL_SET_PORT_PRIORITY:
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index ff667e18b2d6..742a6c27d7a2 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -37,6 +37,8 @@
static void br_multicast_start_querier(struct net_bridge *br,
struct bridge_mcast_own_query *query);
+static void br_multicast_add_router(struct net_bridge *br,
+ struct net_bridge_port *port);
unsigned int br_mdb_rehash_seq;
static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b)
@@ -936,6 +938,8 @@ void br_multicast_enable_port(struct net_bridge_port *port)
#if IS_ENABLED(CONFIG_IPV6)
br_multicast_enable(&port->ip6_own_query);
#endif
+ if (port->multicast_router == 2 && hlist_unhashed(&port->rlist))
+ br_multicast_add_router(br, port);
out:
spin_unlock(&br->multicast_lock);
@@ -975,9 +979,6 @@ static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
int err = 0;
__be32 group;
- if (!pskb_may_pull(skb, sizeof(*ih)))
- return -EINVAL;
-
ih = igmpv3_report_hdr(skb);
num = ntohs(ih->ngrec);
len = sizeof(*ih);
@@ -1247,25 +1248,14 @@ static int br_ip4_multicast_query(struct net_bridge *br,
max_delay = 10 * HZ;
group = 0;
}
- } else {
- if (!pskb_may_pull(skb, sizeof(struct igmpv3_query))) {
- err = -EINVAL;
- goto out;
- }
-
+ } else if (skb->len >= sizeof(*ih3)) {
ih3 = igmpv3_query_hdr(skb);
if (ih3->nsrcs)
goto out;
max_delay = ih3->code ?
IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
- }
-
- /* RFC2236+RFC3376 (IGMPv2+IGMPv3) require the multicast link layer
- * all-systems destination addresses (224.0.0.1) for general queries
- */
- if (!group && iph->daddr != htonl(INADDR_ALLHOSTS_GROUP)) {
- err = -EINVAL;
+ } else {
goto out;
}
@@ -1328,12 +1318,6 @@ static int br_ip6_multicast_query(struct net_bridge *br,
(port && port->state == BR_STATE_DISABLED))
goto out;
- /* RFC2710+RFC3810 (MLDv1+MLDv2) require link-local source addresses */
- if (!(ipv6_addr_type(&ip6h->saddr) & IPV6_ADDR_LINKLOCAL)) {
- err = -EINVAL;
- goto out;
- }
-
if (skb->len == sizeof(*mld)) {
if (!pskb_may_pull(skb, sizeof(*mld))) {
err = -EINVAL;
@@ -1357,14 +1341,6 @@ static int br_ip6_multicast_query(struct net_bridge *br,
is_general_query = group && ipv6_addr_any(group);
- /* RFC2710+RFC3810 (MLDv1+MLDv2) require the multicast link layer
- * all-nodes destination address (ff02::1) for general queries
- */
- if (is_general_query && !ipv6_addr_is_ll_all_nodes(&ip6h->daddr)) {
- err = -EINVAL;
- goto out;
- }
-
if (is_general_query) {
saddr.proto = htons(ETH_P_IPV6);
saddr.u.ip6 = ip6h->saddr;
@@ -1556,74 +1532,22 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br,
struct sk_buff *skb,
u16 vid)
{
- struct sk_buff *skb2 = skb;
- const struct iphdr *iph;
+ struct sk_buff *skb_trimmed = NULL;
struct igmphdr *ih;
- unsigned int len;
- unsigned int offset;
int err;
- /* We treat OOM as packet loss for now. */
- if (!pskb_may_pull(skb, sizeof(*iph)))
- return -EINVAL;
-
- iph = ip_hdr(skb);
-
- if (iph->ihl < 5 || iph->version != 4)
- return -EINVAL;
-
- if (!pskb_may_pull(skb, ip_hdrlen(skb)))
- return -EINVAL;
-
- iph = ip_hdr(skb);
+ err = ip_mc_check_igmp(skb, &skb_trimmed);
- if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
- return -EINVAL;
-
- if (iph->protocol != IPPROTO_IGMP) {
- if (!ipv4_is_local_multicast(iph->daddr))
+ if (err == -ENOMSG) {
+ if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr))
BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
return 0;
+ } else if (err < 0) {
+ return err;
}
- len = ntohs(iph->tot_len);
- if (skb->len < len || len < ip_hdrlen(skb))
- return -EINVAL;
-
- if (skb->len > len) {
- skb2 = skb_clone(skb, GFP_ATOMIC);
- if (!skb2)
- return -ENOMEM;
-
- err = pskb_trim_rcsum(skb2, len);
- if (err)
- goto err_out;
- }
-
- len -= ip_hdrlen(skb2);
- offset = skb_network_offset(skb2) + ip_hdrlen(skb2);
- __skb_pull(skb2, offset);
- skb_reset_transport_header(skb2);
-
- err = -EINVAL;
- if (!pskb_may_pull(skb2, sizeof(*ih)))
- goto out;
-
- switch (skb2->ip_summed) {
- case CHECKSUM_COMPLETE:
- if (!csum_fold(skb2->csum))
- break;
- /* fall through */
- case CHECKSUM_NONE:
- skb2->csum = 0;
- if (skb_checksum_complete(skb2))
- goto out;
- }
-
- err = 0;
-
BR_INPUT_SKB_CB(skb)->igmp = 1;
- ih = igmp_hdr(skb2);
+ ih = igmp_hdr(skb);
switch (ih->type) {
case IGMP_HOST_MEMBERSHIP_REPORT:
@@ -1632,21 +1556,19 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br,
err = br_ip4_multicast_add_group(br, port, ih->group, vid);
break;
case IGMPV3_HOST_MEMBERSHIP_REPORT:
- err = br_ip4_multicast_igmp3_report(br, port, skb2, vid);
+ err = br_ip4_multicast_igmp3_report(br, port, skb_trimmed, vid);
break;
case IGMP_HOST_MEMBERSHIP_QUERY:
- err = br_ip4_multicast_query(br, port, skb2, vid);
+ err = br_ip4_multicast_query(br, port, skb_trimmed, vid);
break;
case IGMP_HOST_LEAVE_MESSAGE:
br_ip4_multicast_leave_group(br, port, ih->group, vid);
break;
}
-out:
- __skb_push(skb2, offset);
-err_out:
- if (skb2 != skb)
- kfree_skb(skb2);
+ if (skb_trimmed)
+ kfree_skb(skb_trimmed);
+
return err;
}
@@ -1656,138 +1578,42 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br,
struct sk_buff *skb,
u16 vid)
{
- struct sk_buff *skb2;
- const struct ipv6hdr *ip6h;
- u8 icmp6_type;
- u8 nexthdr;
- __be16 frag_off;
- unsigned int len;
- int offset;
+ struct sk_buff *skb_trimmed = NULL;
+ struct mld_msg *mld;
int err;
- if (!pskb_may_pull(skb, sizeof(*ip6h)))
- return -EINVAL;
-
- ip6h = ipv6_hdr(skb);
-
- /*
- * We're interested in MLD messages only.
- * - Version is 6
- * - MLD has always Router Alert hop-by-hop option
- * - But we do not support jumbrograms.
- */
- if (ip6h->version != 6)
- return 0;
+ err = ipv6_mc_check_mld(skb, &skb_trimmed);
- /* Prevent flooding this packet if there is no listener present */
- if (!ipv6_addr_is_ll_all_nodes(&ip6h->daddr))
- BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
-
- if (ip6h->nexthdr != IPPROTO_HOPOPTS ||
- ip6h->payload_len == 0)
- return 0;
-
- len = ntohs(ip6h->payload_len) + sizeof(*ip6h);
- if (skb->len < len)
- return -EINVAL;
-
- nexthdr = ip6h->nexthdr;
- offset = ipv6_skip_exthdr(skb, sizeof(*ip6h), &nexthdr, &frag_off);
-
- if (offset < 0 || nexthdr != IPPROTO_ICMPV6)
+ if (err == -ENOMSG) {
+ if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
+ BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
return 0;
-
- /* Okay, we found ICMPv6 header */
- skb2 = skb_clone(skb, GFP_ATOMIC);
- if (!skb2)
- return -ENOMEM;
-
- err = -EINVAL;
- if (!pskb_may_pull(skb2, offset + sizeof(struct icmp6hdr)))
- goto out;
-
- len -= offset - skb_network_offset(skb2);
-
- __skb_pull(skb2, offset);
- skb_reset_transport_header(skb2);
- skb_postpull_rcsum(skb2, skb_network_header(skb2),
- skb_network_header_len(skb2));
-
- icmp6_type = icmp6_hdr(skb2)->icmp6_type;
-
- switch (icmp6_type) {
- case ICMPV6_MGM_QUERY:
- case ICMPV6_MGM_REPORT:
- case ICMPV6_MGM_REDUCTION:
- case ICMPV6_MLD2_REPORT:
- break;
- default:
- err = 0;
- goto out;
- }
-
- /* Okay, we found MLD message. Check further. */
- if (skb2->len > len) {
- err = pskb_trim_rcsum(skb2, len);
- if (err)
- goto out;
- err = -EINVAL;
- }
-
- ip6h = ipv6_hdr(skb2);
-
- switch (skb2->ip_summed) {
- case CHECKSUM_COMPLETE:
- if (!csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, skb2->len,
- IPPROTO_ICMPV6, skb2->csum))
- break;
- /*FALLTHROUGH*/
- case CHECKSUM_NONE:
- skb2->csum = ~csum_unfold(csum_ipv6_magic(&ip6h->saddr,
- &ip6h->daddr,
- skb2->len,
- IPPROTO_ICMPV6, 0));
- if (__skb_checksum_complete(skb2))
- goto out;
+ } else if (err < 0) {
+ return err;
}
- err = 0;
-
BR_INPUT_SKB_CB(skb)->igmp = 1;
+ mld = (struct mld_msg *)skb_transport_header(skb);
- switch (icmp6_type) {
+ switch (mld->mld_type) {
case ICMPV6_MGM_REPORT:
- {
- struct mld_msg *mld;
- if (!pskb_may_pull(skb2, sizeof(*mld))) {
- err = -EINVAL;
- goto out;
- }
- mld = (struct mld_msg *)skb_transport_header(skb2);
BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid);
break;
- }
case ICMPV6_MLD2_REPORT:
- err = br_ip6_multicast_mld2_report(br, port, skb2, vid);
+ err = br_ip6_multicast_mld2_report(br, port, skb_trimmed, vid);
break;
case ICMPV6_MGM_QUERY:
- err = br_ip6_multicast_query(br, port, skb2, vid);
+ err = br_ip6_multicast_query(br, port, skb_trimmed, vid);
break;
case ICMPV6_MGM_REDUCTION:
- {
- struct mld_msg *mld;
- if (!pskb_may_pull(skb2, sizeof(*mld))) {
- err = -EINVAL;
- goto out;
- }
- mld = (struct mld_msg *)skb_transport_header(skb2);
br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid);
- }
+ break;
}
-out:
- kfree_skb(skb2);
+ if (skb_trimmed)
+ kfree_skb(skb_trimmed);
+
return err;
}
#endif
@@ -1949,11 +1775,9 @@ out:
int br_multicast_set_router(struct net_bridge *br, unsigned long val)
{
- int err = -ENOENT;
+ int err = -EINVAL;
spin_lock_bh(&br->multicast_lock);
- if (!netif_running(br->dev))
- goto unlock;
switch (val) {
case 0:
@@ -1964,13 +1788,8 @@ int br_multicast_set_router(struct net_bridge *br, unsigned long val)
br->multicast_router = val;
err = 0;
break;
-
- default:
- err = -EINVAL;
- break;
}
-unlock:
spin_unlock_bh(&br->multicast_lock);
return err;
@@ -1979,11 +1798,9 @@ unlock:
int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
{
struct net_bridge *br = p->br;
- int err = -ENOENT;
+ int err = -EINVAL;
spin_lock(&br->multicast_lock);
- if (!netif_running(br->dev) || p->state == BR_STATE_DISABLED)
- goto unlock;
switch (val) {
case 0:
@@ -2005,13 +1822,8 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
br_multicast_add_router(br, p);
break;
-
- default:
- err = -EINVAL;
- break;
}
-unlock:
spin_unlock(&br->multicast_lock);
return err;
@@ -2116,15 +1928,11 @@ unlock:
int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val)
{
- int err = -ENOENT;
+ int err = -EINVAL;
u32 old;
struct net_bridge_mdb_htable *mdb;
spin_lock_bh(&br->multicast_lock);
- if (!netif_running(br->dev))
- goto unlock;
-
- err = -EINVAL;
if (!is_power_of_2(val))
goto unlock;
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter_hooks.c
index 60ddfbeb47f5..d89f4fac0bc5 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter_hooks.c
@@ -34,6 +34,7 @@
#include <net/ip.h>
#include <net/ipv6.h>
+#include <net/addrconf.h>
#include <net/route.h>
#include <net/netfilter/br_netfilter.h>
@@ -115,22 +116,19 @@ struct brnf_frag_data {
char mac[NF_BRIDGE_MAX_MAC_HEADER_LENGTH];
u8 encap_size;
u8 size;
+ u16 vlan_tci;
+ __be16 vlan_proto;
};
static DEFINE_PER_CPU(struct brnf_frag_data, brnf_frag_data_storage);
#endif
-static struct nf_bridge_info *nf_bridge_info_get(const struct sk_buff *skb)
+static void nf_bridge_info_free(struct sk_buff *skb)
{
- return skb->nf_bridge;
-}
-
-static inline struct rtable *bridge_parent_rtable(const struct net_device *dev)
-{
- struct net_bridge_port *port;
-
- port = br_port_get_rcu(dev);
- return port ? &port->br->fake_rtable : NULL;
+ if (skb->nf_bridge) {
+ nf_bridge_put(skb->nf_bridge);
+ skb->nf_bridge = NULL;
+ }
}
static inline struct net_device *bridge_parent(const struct net_device *dev)
@@ -141,15 +139,6 @@ static inline struct net_device *bridge_parent(const struct net_device *dev)
return port ? port->br->dev : NULL;
}
-static inline struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb)
-{
- skb->nf_bridge = kzalloc(sizeof(struct nf_bridge_info), GFP_ATOMIC);
- if (likely(skb->nf_bridge))
- atomic_set(&(skb->nf_bridge->use), 1);
-
- return skb->nf_bridge;
-}
-
static inline struct nf_bridge_info *nf_bridge_unshare(struct sk_buff *skb)
{
struct nf_bridge_info *nf_bridge = skb->nf_bridge;
@@ -167,7 +156,7 @@ static inline struct nf_bridge_info *nf_bridge_unshare(struct sk_buff *skb)
return nf_bridge;
}
-static unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb)
+unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb)
{
switch (skb->protocol) {
case __cpu_to_be16(ETH_P_8021Q):
@@ -179,14 +168,6 @@ static unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb)
}
}
-static inline void nf_bridge_push_encap_header(struct sk_buff *skb)
-{
- unsigned int len = nf_bridge_encap_header_len(skb);
-
- skb_push(skb, len);
- skb->network_header -= len;
-}
-
static inline void nf_bridge_pull_encap_header(struct sk_buff *skb)
{
unsigned int len = nf_bridge_encap_header_len(skb);
@@ -208,7 +189,7 @@ static inline void nf_bridge_pull_encap_header_rcsum(struct sk_buff *skb)
* expected format
*/
-static int br_parse_ip_options(struct sk_buff *skb)
+static int br_validate_ipv4(struct sk_buff *skb)
{
const struct iphdr *iph;
struct net_device *dev = skb->dev;
@@ -256,7 +237,7 @@ drop:
return -1;
}
-static void nf_bridge_update_protocol(struct sk_buff *skb)
+void nf_bridge_update_protocol(struct sk_buff *skb)
{
switch (skb->nf_bridge->orig_proto) {
case BRNF_PROTO_8021Q:
@@ -270,43 +251,12 @@ static void nf_bridge_update_protocol(struct sk_buff *skb)
}
}
-/* PF_BRIDGE/PRE_ROUTING *********************************************/
-/* Undo the changes made for ip6tables PREROUTING and continue the
- * bridge PRE_ROUTING hook. */
-static int br_nf_pre_routing_finish_ipv6(struct sock *sk, struct sk_buff *skb)
-{
- struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
- struct rtable *rt;
-
- if (nf_bridge->pkt_otherhost) {
- skb->pkt_type = PACKET_OTHERHOST;
- nf_bridge->pkt_otherhost = false;
- }
- nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
-
- rt = bridge_parent_rtable(nf_bridge->physindev);
- if (!rt) {
- kfree_skb(skb);
- return 0;
- }
- skb_dst_set_noref(skb, &rt->dst);
-
- skb->dev = nf_bridge->physindev;
- nf_bridge_update_protocol(skb);
- nf_bridge_push_encap_header(skb);
- NF_HOOK_THRESH(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, sk, skb,
- skb->dev, NULL,
- br_handle_frame_finish, 1);
-
- return 0;
-}
-
/* Obtain the correct destination MAC address, while preserving the original
* source MAC address. If we already know this address, we just copy it. If we
* don't, we use the neighbour framework to find out. In both cases, we make
* sure that br_handle_frame_finish() is called afterwards.
*/
-static int br_nf_pre_routing_finish_bridge(struct sock *sk, struct sk_buff *skb)
+int br_nf_pre_routing_finish_bridge(struct sock *sk, struct sk_buff *skb)
{
struct neighbour *neigh;
struct dst_entry *dst;
@@ -346,8 +296,9 @@ free_skb:
return 0;
}
-static bool daddr_was_changed(const struct sk_buff *skb,
- const struct nf_bridge_info *nf_bridge)
+static inline bool
+br_nf_ipv4_daddr_was_changed(const struct sk_buff *skb,
+ const struct nf_bridge_info *nf_bridge)
{
return ip_hdr(skb)->daddr != nf_bridge->ipv4_daddr;
}
@@ -398,17 +349,15 @@ static int br_nf_pre_routing_finish(struct sock *sk, struct sk_buff *skb)
struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct rtable *rt;
int err;
- int frag_max_size;
- frag_max_size = IPCB(skb)->frag_max_size;
- BR_INPUT_SKB_CB(skb)->frag_max_size = frag_max_size;
+ nf_bridge->frag_max_size = IPCB(skb)->frag_max_size;
if (nf_bridge->pkt_otherhost) {
skb->pkt_type = PACKET_OTHERHOST;
nf_bridge->pkt_otherhost = false;
}
- nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
- if (daddr_was_changed(skb, nf_bridge)) {
+ nf_bridge->mask &= ~BRNF_NF_BRIDGE_PREROUTING;
+ if (br_nf_ipv4_daddr_was_changed(skb, nf_bridge)) {
if ((err = ip_route_input(skb, iph->daddr, iph->saddr, iph->tos, dev))) {
struct in_device *in_dev = __in_dev_get_rcu(dev);
@@ -486,7 +435,7 @@ static struct net_device *brnf_get_logical_dev(struct sk_buff *skb, const struct
}
/* Some common code for IPv4/IPv6 */
-static struct net_device *setup_pre_routing(struct sk_buff *skb)
+struct net_device *setup_pre_routing(struct sk_buff *skb)
{
struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
@@ -509,106 +458,6 @@ static struct net_device *setup_pre_routing(struct sk_buff *skb)
return skb->dev;
}
-/* We only check the length. A bridge shouldn't do any hop-by-hop stuff anyway */
-static int check_hbh_len(struct sk_buff *skb)
-{
- unsigned char *raw = (u8 *)(ipv6_hdr(skb) + 1);
- u32 pkt_len;
- const unsigned char *nh = skb_network_header(skb);
- int off = raw - nh;
- int len = (raw[1] + 1) << 3;
-
- if ((raw + len) - skb->data > skb_headlen(skb))
- goto bad;
-
- off += 2;
- len -= 2;
-
- while (len > 0) {
- int optlen = nh[off + 1] + 2;
-
- switch (nh[off]) {
- case IPV6_TLV_PAD1:
- optlen = 1;
- break;
-
- case IPV6_TLV_PADN:
- break;
-
- case IPV6_TLV_JUMBO:
- if (nh[off + 1] != 4 || (off & 3) != 2)
- goto bad;
- pkt_len = ntohl(*(__be32 *) (nh + off + 2));
- if (pkt_len <= IPV6_MAXPLEN ||
- ipv6_hdr(skb)->payload_len)
- goto bad;
- if (pkt_len > skb->len - sizeof(struct ipv6hdr))
- goto bad;
- if (pskb_trim_rcsum(skb,
- pkt_len + sizeof(struct ipv6hdr)))
- goto bad;
- nh = skb_network_header(skb);
- break;
- default:
- if (optlen > len)
- goto bad;
- break;
- }
- off += optlen;
- len -= optlen;
- }
- if (len == 0)
- return 0;
-bad:
- return -1;
-
-}
-
-/* Replicate the checks that IPv6 does on packet reception and pass the packet
- * to ip6tables, which doesn't support NAT, so things are fairly simple. */
-static unsigned int br_nf_pre_routing_ipv6(const struct nf_hook_ops *ops,
- struct sk_buff *skb,
- const struct nf_hook_state *state)
-{
- const struct ipv6hdr *hdr;
- u32 pkt_len;
-
- if (skb->len < sizeof(struct ipv6hdr))
- return NF_DROP;
-
- if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
- return NF_DROP;
-
- hdr = ipv6_hdr(skb);
-
- if (hdr->version != 6)
- return NF_DROP;
-
- pkt_len = ntohs(hdr->payload_len);
-
- if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
- if (pkt_len + sizeof(struct ipv6hdr) > skb->len)
- return NF_DROP;
- if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr)))
- return NF_DROP;
- }
- if (hdr->nexthdr == NEXTHDR_HOP && check_hbh_len(skb))
- return NF_DROP;
-
- nf_bridge_put(skb->nf_bridge);
- if (!nf_bridge_alloc(skb))
- return NF_DROP;
- if (!setup_pre_routing(skb))
- return NF_DROP;
-
- skb->protocol = htons(ETH_P_IPV6);
- NF_HOOK(NFPROTO_IPV6, NF_INET_PRE_ROUTING, state->sk, skb,
- skb->dev, NULL,
- br_nf_pre_routing_finish_ipv6);
-
- return NF_STOLEN;
-}
-
/* Direct IPv6 traffic to br_nf_pre_routing_ipv6.
* Replicate the checks that IPv4 does on packet reception.
* Set skb->dev to the bridge device (i.e. parent of the
@@ -648,7 +497,7 @@ static unsigned int br_nf_pre_routing(const struct nf_hook_ops *ops,
nf_bridge_pull_encap_header_rcsum(skb);
- if (br_parse_ip_options(skb))
+ if (br_validate_ipv4(skb))
return NF_DROP;
nf_bridge_put(skb->nf_bridge);
@@ -692,12 +541,12 @@ static int br_nf_forward_finish(struct sock *sk, struct sk_buff *skb)
struct net_device *in;
if (!IS_ARP(skb) && !IS_VLAN_ARP(skb)) {
- int frag_max_size;
- if (skb->protocol == htons(ETH_P_IP)) {
- frag_max_size = IPCB(skb)->frag_max_size;
- BR_INPUT_SKB_CB(skb)->frag_max_size = frag_max_size;
- }
+ if (skb->protocol == htons(ETH_P_IP))
+ nf_bridge->frag_max_size = IPCB(skb)->frag_max_size;
+
+ if (skb->protocol == htons(ETH_P_IPV6))
+ nf_bridge->frag_max_size = IP6CB(skb)->frag_max_size;
in = nf_bridge->physindev;
if (nf_bridge->pkt_otherhost) {
@@ -760,12 +609,15 @@ static unsigned int br_nf_forward_ip(const struct nf_hook_ops *ops,
}
if (pf == NFPROTO_IPV4) {
- int frag_max = BR_INPUT_SKB_CB(skb)->frag_max_size;
-
- if (br_parse_ip_options(skb))
+ if (br_validate_ipv4(skb))
return NF_DROP;
+ IPCB(skb)->frag_max_size = nf_bridge->frag_max_size;
+ }
- IPCB(skb)->frag_max_size = frag_max;
+ if (pf == NFPROTO_IPV6) {
+ if (br_validate_ipv6(skb))
+ return NF_DROP;
+ IP6CB(skb)->frag_max_size = nf_bridge->frag_max_size;
}
nf_bridge->physoutdev = skb->dev;
@@ -815,7 +667,7 @@ static unsigned int br_nf_forward_arp(const struct nf_hook_ops *ops,
return NF_STOLEN;
}
-#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV4)
+#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV4) || IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
static int br_nf_push_frag_xmit(struct sock *sk, struct sk_buff *skb)
{
struct brnf_frag_data *data;
@@ -829,56 +681,114 @@ static int br_nf_push_frag_xmit(struct sock *sk, struct sk_buff *skb)
return 0;
}
+ if (data->vlan_tci) {
+ skb->vlan_tci = data->vlan_tci;
+ skb->vlan_proto = data->vlan_proto;
+ }
+
skb_copy_to_linear_data_offset(skb, -data->size, data->mac, data->size);
__skb_push(skb, data->encap_size);
+ nf_bridge_info_free(skb);
return br_dev_queue_push_xmit(sk, skb);
}
+#endif
+
+static int br_nf_ip_fragment(struct sock *sk, struct sk_buff *skb,
+ int (*output)(struct sock *, struct sk_buff *))
+{
+ unsigned int mtu = ip_skb_dst_mtu(skb);
+ struct iphdr *iph = ip_hdr(skb);
+ struct rtable *rt = skb_rtable(skb);
+ struct net_device *dev = rt->dst.dev;
+
+ if (unlikely(((iph->frag_off & htons(IP_DF)) && !skb->ignore_df) ||
+ (IPCB(skb)->frag_max_size &&
+ IPCB(skb)->frag_max_size > mtu))) {
+ IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGFAILS);
+ kfree_skb(skb);
+ return -EMSGSIZE;
+ }
+
+ return ip_do_fragment(sk, skb, output);
+}
+
+static unsigned int nf_bridge_mtu_reduction(const struct sk_buff *skb)
+{
+ if (skb->nf_bridge->orig_proto == BRNF_PROTO_PPPOE)
+ return PPPOE_SES_HLEN;
+ return 0;
+}
static int br_nf_dev_queue_xmit(struct sock *sk, struct sk_buff *skb)
{
- int ret;
- int frag_max_size;
+ struct nf_bridge_info *nf_bridge;
unsigned int mtu_reserved;
- if (skb_is_gso(skb) || skb->protocol != htons(ETH_P_IP))
+ mtu_reserved = nf_bridge_mtu_reduction(skb);
+
+ if (skb_is_gso(skb) || skb->len + mtu_reserved <= skb->dev->mtu) {
+ nf_bridge_info_free(skb);
return br_dev_queue_push_xmit(sk, skb);
+ }
- mtu_reserved = nf_bridge_mtu_reduction(skb);
+ nf_bridge = nf_bridge_info_get(skb);
+
+#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV4)
/* This is wrong! We should preserve the original fragment
* boundaries by preserving frag_list rather than refragmenting.
*/
- if (skb->len + mtu_reserved > skb->dev->mtu) {
+ if (skb->protocol == htons(ETH_P_IP)) {
struct brnf_frag_data *data;
- frag_max_size = BR_INPUT_SKB_CB(skb)->frag_max_size;
- if (br_parse_ip_options(skb))
- /* Drop invalid packet */
+ if (br_validate_ipv4(skb))
return NF_DROP;
- IPCB(skb)->frag_max_size = frag_max_size;
+
+ IPCB(skb)->frag_max_size = nf_bridge->frag_max_size;
nf_bridge_update_protocol(skb);
data = this_cpu_ptr(&brnf_frag_data_storage);
+
+ data->vlan_tci = skb->vlan_tci;
+ data->vlan_proto = skb->vlan_proto;
data->encap_size = nf_bridge_encap_header_len(skb);
data->size = ETH_HLEN + data->encap_size;
skb_copy_from_linear_data_offset(skb, -data->size, data->mac,
data->size);
- ret = ip_fragment(sk, skb, br_nf_push_frag_xmit);
- } else {
- ret = br_dev_queue_push_xmit(sk, skb);
+ return br_nf_ip_fragment(sk, skb, br_nf_push_frag_xmit);
}
+#endif
+#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
+ if (skb->protocol == htons(ETH_P_IPV6)) {
+ const struct nf_ipv6_ops *v6ops = nf_get_ipv6_ops();
+ struct brnf_frag_data *data;
- return ret;
-}
-#else
-static int br_nf_dev_queue_xmit(struct sock *sk, struct sk_buff *skb)
-{
- return br_dev_queue_push_xmit(sk, skb);
-}
+ if (br_validate_ipv6(skb))
+ return NF_DROP;
+
+ IP6CB(skb)->frag_max_size = nf_bridge->frag_max_size;
+
+ nf_bridge_update_protocol(skb);
+
+ data = this_cpu_ptr(&brnf_frag_data_storage);
+ data->encap_size = nf_bridge_encap_header_len(skb);
+ data->size = ETH_HLEN + data->encap_size;
+
+ skb_copy_from_linear_data_offset(skb, -data->size, data->mac,
+ data->size);
+
+ if (v6ops)
+ return v6ops->fragment(sk, skb, br_nf_push_frag_xmit);
+ else
+ return -EMSGSIZE;
+ }
#endif
+ nf_bridge_info_free(skb);
+ return br_dev_queue_push_xmit(sk, skb);
+}
/* PF_BRIDGE/POST_ROUTING ********************************************/
static unsigned int br_nf_post_routing(const struct nf_hook_ops *ops,
@@ -964,6 +874,8 @@ static void br_nf_pre_routing_finish_bridge_slow(struct sk_buff *skb)
nf_bridge->neigh_header,
ETH_HLEN - ETH_ALEN);
skb->dev = nf_bridge->physindev;
+
+ nf_bridge->physoutdev = NULL;
br_handle_frame_finish(NULL, skb);
}
diff --git a/net/bridge/br_netfilter_ipv6.c b/net/bridge/br_netfilter_ipv6.c
new file mode 100644
index 000000000000..6d12d2675c80
--- /dev/null
+++ b/net/bridge/br_netfilter_ipv6.c
@@ -0,0 +1,245 @@
+/*
+ * Handle firewalling
+ * Linux ethernet bridge
+ *
+ * Authors:
+ * Lennert Buytenhek <buytenh@gnu.org>
+ * Bart De Schuymer <bdschuym@pandora.be>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Lennert dedicates this file to Kerstin Wurdinger.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/ip.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/if_pppox.h>
+#include <linux/ppp_defs.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter_arp.h>
+#include <linux/in_route.h>
+#include <linux/inetdevice.h>
+
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/addrconf.h>
+#include <net/route.h>
+#include <net/netfilter/br_netfilter.h>
+
+#include <asm/uaccess.h>
+#include "br_private.h"
+#ifdef CONFIG_SYSCTL
+#include <linux/sysctl.h>
+#endif
+
+/* We only check the length. A bridge shouldn't do any hop-by-hop stuff
+ * anyway
+ */
+static int br_nf_check_hbh_len(struct sk_buff *skb)
+{
+ unsigned char *raw = (u8 *)(ipv6_hdr(skb) + 1);
+ u32 pkt_len;
+ const unsigned char *nh = skb_network_header(skb);
+ int off = raw - nh;
+ int len = (raw[1] + 1) << 3;
+
+ if ((raw + len) - skb->data > skb_headlen(skb))
+ goto bad;
+
+ off += 2;
+ len -= 2;
+
+ while (len > 0) {
+ int optlen = nh[off + 1] + 2;
+
+ switch (nh[off]) {
+ case IPV6_TLV_PAD1:
+ optlen = 1;
+ break;
+
+ case IPV6_TLV_PADN:
+ break;
+
+ case IPV6_TLV_JUMBO:
+ if (nh[off + 1] != 4 || (off & 3) != 2)
+ goto bad;
+ pkt_len = ntohl(*(__be32 *)(nh + off + 2));
+ if (pkt_len <= IPV6_MAXPLEN ||
+ ipv6_hdr(skb)->payload_len)
+ goto bad;
+ if (pkt_len > skb->len - sizeof(struct ipv6hdr))
+ goto bad;
+ if (pskb_trim_rcsum(skb,
+ pkt_len + sizeof(struct ipv6hdr)))
+ goto bad;
+ nh = skb_network_header(skb);
+ break;
+ default:
+ if (optlen > len)
+ goto bad;
+ break;
+ }
+ off += optlen;
+ len -= optlen;
+ }
+ if (len == 0)
+ return 0;
+bad:
+ return -1;
+}
+
+int br_validate_ipv6(struct sk_buff *skb)
+{
+ const struct ipv6hdr *hdr;
+ struct net_device *dev = skb->dev;
+ struct inet6_dev *idev = in6_dev_get(skb->dev);
+ u32 pkt_len;
+ u8 ip6h_len = sizeof(struct ipv6hdr);
+
+ if (!pskb_may_pull(skb, ip6h_len))
+ goto inhdr_error;
+
+ if (skb->len < ip6h_len)
+ goto drop;
+
+ hdr = ipv6_hdr(skb);
+
+ if (hdr->version != 6)
+ goto inhdr_error;
+
+ pkt_len = ntohs(hdr->payload_len);
+
+ if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
+ if (pkt_len + ip6h_len > skb->len) {
+ IP6_INC_STATS_BH(dev_net(dev), idev,
+ IPSTATS_MIB_INTRUNCATEDPKTS);
+ goto drop;
+ }
+ if (pskb_trim_rcsum(skb, pkt_len + ip6h_len)) {
+ IP6_INC_STATS_BH(dev_net(dev), idev,
+ IPSTATS_MIB_INDISCARDS);
+ goto drop;
+ }
+ }
+ if (hdr->nexthdr == NEXTHDR_HOP && br_nf_check_hbh_len(skb))
+ goto drop;
+
+ memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm));
+ /* No IP options in IPv6 header; however it should be
+ * checked if some next headers need special treatment
+ */
+ return 0;
+
+inhdr_error:
+ IP6_INC_STATS_BH(dev_net(dev), idev, IPSTATS_MIB_INHDRERRORS);
+drop:
+ return -1;
+}
+
+static inline bool
+br_nf_ipv6_daddr_was_changed(const struct sk_buff *skb,
+ const struct nf_bridge_info *nf_bridge)
+{
+ return memcmp(&nf_bridge->ipv6_daddr, &ipv6_hdr(skb)->daddr,
+ sizeof(ipv6_hdr(skb)->daddr)) != 0;
+}
+
+/* PF_BRIDGE/PRE_ROUTING: Undo the changes made for ip6tables
+ * PREROUTING and continue the bridge PRE_ROUTING hook. See comment
+ * for br_nf_pre_routing_finish(), same logic is used here but
+ * equivalent IPv6 function ip6_route_input() called indirectly.
+ */
+static int br_nf_pre_routing_finish_ipv6(struct sock *sk, struct sk_buff *skb)
+{
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+ struct rtable *rt;
+ struct net_device *dev = skb->dev;
+ const struct nf_ipv6_ops *v6ops = nf_get_ipv6_ops();
+
+ nf_bridge->frag_max_size = IP6CB(skb)->frag_max_size;
+
+ if (nf_bridge->pkt_otherhost) {
+ skb->pkt_type = PACKET_OTHERHOST;
+ nf_bridge->pkt_otherhost = false;
+ }
+ nf_bridge->mask &= ~BRNF_NF_BRIDGE_PREROUTING;
+ if (br_nf_ipv6_daddr_was_changed(skb, nf_bridge)) {
+ skb_dst_drop(skb);
+ v6ops->route_input(skb);
+
+ if (skb_dst(skb)->error) {
+ kfree_skb(skb);
+ return 0;
+ }
+
+ if (skb_dst(skb)->dev == dev) {
+ skb->dev = nf_bridge->physindev;
+ nf_bridge_update_protocol(skb);
+ nf_bridge_push_encap_header(skb);
+ NF_HOOK_THRESH(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING,
+ sk, skb, skb->dev, NULL,
+ br_nf_pre_routing_finish_bridge,
+ 1);
+ return 0;
+ }
+ ether_addr_copy(eth_hdr(skb)->h_dest, dev->dev_addr);
+ skb->pkt_type = PACKET_HOST;
+ } else {
+ rt = bridge_parent_rtable(nf_bridge->physindev);
+ if (!rt) {
+ kfree_skb(skb);
+ return 0;
+ }
+ skb_dst_set_noref(skb, &rt->dst);
+ }
+
+ skb->dev = nf_bridge->physindev;
+ nf_bridge_update_protocol(skb);
+ nf_bridge_push_encap_header(skb);
+ NF_HOOK_THRESH(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, sk, skb,
+ skb->dev, NULL,
+ br_handle_frame_finish, 1);
+
+ return 0;
+}
+
+/* Replicate the checks that IPv6 does on packet reception and pass the packet
+ * to ip6tables.
+ */
+unsigned int br_nf_pre_routing_ipv6(const struct nf_hook_ops *ops,
+ struct sk_buff *skb,
+ const struct nf_hook_state *state)
+{
+ struct nf_bridge_info *nf_bridge;
+
+ if (br_validate_ipv6(skb))
+ return NF_DROP;
+
+ nf_bridge_put(skb->nf_bridge);
+ if (!nf_bridge_alloc(skb))
+ return NF_DROP;
+ if (!setup_pre_routing(skb))
+ return NF_DROP;
+
+ nf_bridge = nf_bridge_info_get(skb);
+ nf_bridge->ipv6_daddr = ipv6_hdr(skb)->daddr;
+
+ skb->protocol = htons(ETH_P_IPV6);
+ NF_HOOK(NFPROTO_IPV6, NF_INET_PRE_ROUTING, state->sk, skb,
+ skb->dev, NULL,
+ br_nf_pre_routing_finish_ipv6);
+
+ return NF_STOLEN;
+}
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 4b5c236998ff..6b67ed3831de 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -586,7 +586,7 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
struct nlattr *afspec;
struct net_bridge_port *p;
struct nlattr *tb[IFLA_BRPORT_MAX + 1];
- int err = 0, ret_offload = 0;
+ int err = 0;
protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
@@ -628,16 +628,6 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
afspec, RTM_SETLINK);
}
- if (p && !(flags & BRIDGE_FLAGS_SELF)) {
- /* set bridge attributes in hardware if supported
- */
- ret_offload = netdev_switch_port_bridge_setlink(dev, nlh,
- flags);
- if (ret_offload && ret_offload != -EOPNOTSUPP)
- br_warn(p->br, "error setting attrs on port %u(%s)\n",
- (unsigned int)p->port_no, p->dev->name);
- }
-
if (err == 0)
br_ifinfo_notify(RTM_NEWLINK, p);
out:
@@ -649,7 +639,7 @@ int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
{
struct nlattr *afspec;
struct net_bridge_port *p;
- int err = 0, ret_offload = 0;
+ int err = 0;
afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
if (!afspec)
@@ -668,16 +658,6 @@ int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
*/
br_ifinfo_notify(RTM_NEWLINK, p);
- if (p && !(flags & BRIDGE_FLAGS_SELF)) {
- /* del bridge attributes in hardware
- */
- ret_offload = netdev_switch_port_bridge_dellink(dev, nlh,
- flags);
- if (ret_offload && ret_offload != -EOPNOTSUPP)
- br_warn(p->br, "error deleting attrs on port %u (%s)\n",
- (unsigned int)p->port_no, p->dev->name);
- }
-
return err;
}
static int br_validate(struct nlattr *tb[], struct nlattr *data[])
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 3362c29400f1..8b21146b24a0 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -18,6 +18,7 @@
#include <linux/netpoll.h>
#include <linux/u64_stats_sync.h>
#include <net/route.h>
+#include <net/ip6_fib.h>
#include <linux/if_vlan.h>
#define BR_HASH_BITS 8
@@ -33,8 +34,8 @@
/* Control of forwarding link local multicast */
#define BR_GROUPFWD_DEFAULT 0
-/* Don't allow forwarding control protocols like STP and LLDP */
-#define BR_GROUPFWD_RESTRICTED 0x4007u
+/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
+#define BR_GROUPFWD_RESTRICTED 0x0007u
/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
#define BR_GROUPFWD_8021AD 0xB801u
@@ -214,7 +215,10 @@ struct net_bridge
spinlock_t hash_lock;
struct hlist_head hash[BR_HASH_SIZE];
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
- struct rtable fake_rtable;
+ union {
+ struct rtable fake_rtable;
+ struct rt6_info fake_rt6_info;
+ };
bool nf_call_iptables;
bool nf_call_ip6tables;
bool nf_call_arptables;
@@ -304,7 +308,6 @@ struct br_input_skb_cb {
int mrouters_only;
#endif
- u16 frag_max_size;
bool proxyarp_replied;
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
@@ -384,7 +387,7 @@ void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
void br_fdb_cleanup(unsigned long arg);
void br_fdb_delete_by_port(struct net_bridge *br,
- const struct net_bridge_port *p, int do_all);
+ const struct net_bridge_port *p, u16 vid, int do_all);
struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
const unsigned char *addr, __u16 vid);
int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
diff --git a/net/bridge/br_stp.c b/net/bridge/br_stp.c
index fb3ebe615513..b4b6dab9c285 100644
--- a/net/bridge/br_stp.c
+++ b/net/bridge/br_stp.c
@@ -39,10 +39,14 @@ void br_log_state(const struct net_bridge_port *p)
void br_set_state(struct net_bridge_port *p, unsigned int state)
{
+ struct switchdev_attr attr = {
+ .id = SWITCHDEV_ATTR_PORT_STP_STATE,
+ .u.stp_state = state,
+ };
int err;
p->state = state;
- err = netdev_switch_port_stp_update(p->dev, state);
+ err = switchdev_port_attr_set(p->dev, &attr);
if (err && err != -EOPNOTSUPP)
br_warn(p->br, "error setting offload STP state on port %u(%s)\n",
(unsigned int) p->port_no, p->dev->name);
@@ -424,7 +428,6 @@ static void br_make_forwarding(struct net_bridge_port *p)
else
br_set_state(p, BR_STATE_LEARNING);
- br_multicast_enable_port(p);
br_log_state(p);
br_ifinfo_notify(RTM_NEWLINK, p);
@@ -458,6 +461,12 @@ void br_port_state_selection(struct net_bridge *br)
}
}
+ if (p->state != BR_STATE_BLOCKING)
+ br_multicast_enable_port(p);
+ /* Multicast is not disabled for the port when it goes in
+ * blocking state because the timers will expire and stop by
+ * themselves without sending more queries.
+ */
if (p->state == BR_STATE_FORWARDING)
++liveports;
}
diff --git a/net/bridge/br_stp_if.c b/net/bridge/br_stp_if.c
index 41146872c1b4..a2730e7196cd 100644
--- a/net/bridge/br_stp_if.c
+++ b/net/bridge/br_stp_if.c
@@ -111,7 +111,7 @@ void br_stp_disable_port(struct net_bridge_port *p)
del_timer(&p->forward_delay_timer);
del_timer(&p->hold_timer);
- br_fdb_delete_by_port(br, p, 0);
+ br_fdb_delete_by_port(br, p, 0, 0);
br_multicast_disable_port(p);
br_configuration_update(br);
@@ -243,12 +243,13 @@ bool br_stp_recalculate_bridge_id(struct net_bridge *br)
return true;
}
-/* called under bridge lock */
+/* Acquires and releases bridge lock */
void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio)
{
struct net_bridge_port *p;
int wasroot;
+ spin_lock_bh(&br->lock);
wasroot = br_is_root_bridge(br);
list_for_each_entry(p, &br->port_list, list) {
@@ -266,6 +267,7 @@ void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio)
br_port_state_selection(br);
if (br_is_root_bridge(br) && !wasroot)
br_become_root_bridge(br);
+ spin_unlock_bh(&br->lock);
}
/* called under bridge lock */
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
index 4905845a94e9..efe415ad842a 100644
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -160,7 +160,7 @@ static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);
static int store_flush(struct net_bridge_port *p, unsigned long v)
{
- br_fdb_delete_by_port(p->br, p, 0); // Don't delete local entry
+ br_fdb_delete_by_port(p->br, p, 0, 0); // Don't delete local entry
return 0;
}
static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush);
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 13013fe8db24..0d41f81838ff 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -2,6 +2,7 @@
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <linux/slab.h>
+#include <net/switchdev.h>
#include "br_private.h"
@@ -36,6 +37,36 @@ static void __vlan_add_flags(struct net_port_vlans *v, u16 vid, u16 flags)
clear_bit(vid, v->untagged_bitmap);
}
+static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
+ u16 vid, u16 flags)
+{
+ const struct net_device_ops *ops = dev->netdev_ops;
+ int err;
+
+ /* If driver uses VLAN ndo ops, use 8021q to install vid
+ * on device, otherwise try switchdev ops to install vid.
+ */
+
+ if (ops->ndo_vlan_rx_add_vid) {
+ err = vlan_vid_add(dev, br->vlan_proto, vid);
+ } else {
+ struct switchdev_obj vlan_obj = {
+ .id = SWITCHDEV_OBJ_PORT_VLAN,
+ .u.vlan = {
+ .flags = flags,
+ .vid_begin = vid,
+ .vid_end = vid,
+ },
+ };
+
+ err = switchdev_port_obj_add(dev, &vlan_obj);
+ if (err == -EOPNOTSUPP)
+ err = 0;
+ }
+
+ return err;
+}
+
static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags)
{
struct net_bridge_port *p = NULL;
@@ -62,7 +93,7 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags)
* This ensures tagged traffic enters the bridge when
* promiscuous mode is disabled by br_manage_promisc().
*/
- err = vlan_vid_add(dev, br->vlan_proto, vid);
+ err = __vlan_vid_add(dev, br, vid, flags);
if (err)
return err;
}
@@ -86,6 +117,30 @@ out_filt:
return err;
}
+static void __vlan_vid_del(struct net_device *dev, struct net_bridge *br,
+ u16 vid)
+{
+ const struct net_device_ops *ops = dev->netdev_ops;
+
+ /* If driver uses VLAN ndo ops, use 8021q to delete vid
+ * on device, otherwise try switchdev ops to delete vid.
+ */
+
+ if (ops->ndo_vlan_rx_kill_vid) {
+ vlan_vid_del(dev, br->vlan_proto, vid);
+ } else {
+ struct switchdev_obj vlan_obj = {
+ .id = SWITCHDEV_OBJ_PORT_VLAN,
+ .u.vlan = {
+ .vid_begin = vid,
+ .vid_end = vid,
+ },
+ };
+
+ switchdev_port_obj_del(dev, &vlan_obj);
+ }
+}
+
static int __vlan_del(struct net_port_vlans *v, u16 vid)
{
if (!test_bit(vid, v->vlan_bitmap))
@@ -96,7 +151,7 @@ static int __vlan_del(struct net_port_vlans *v, u16 vid)
if (v->port_idx) {
struct net_bridge_port *p = v->parent.port;
- vlan_vid_del(p->dev, p->br->vlan_proto, vid);
+ __vlan_vid_del(p->dev, p->br, vid);
}
clear_bit(vid, v->vlan_bitmap);
@@ -686,6 +741,7 @@ int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
return -EINVAL;
br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);
+ br_fdb_delete_by_port(port->br, port, vid, 0);
return __vlan_del(pv, vid);
}
diff --git a/net/bridge/netfilter/ebt_stp.c b/net/bridge/netfilter/ebt_stp.c
index 071d87214dde..0c40570069ba 100644
--- a/net/bridge/netfilter/ebt_stp.c
+++ b/net/bridge/netfilter/ebt_stp.c
@@ -164,8 +164,10 @@ static int ebt_stp_mt_check(const struct xt_mtchk_param *par)
!(info->bitmask & EBT_STP_MASK))
return -EINVAL;
/* Make sure the match only receives stp frames */
- if (!ether_addr_equal(e->destmac, bridge_ula) ||
- !ether_addr_equal(e->destmsk, msk) || !(e->bitmask & EBT_DESTMAC))
+ if (!par->nft_compat &&
+ (!ether_addr_equal(e->destmac, bridge_ula) ||
+ !ether_addr_equal(e->destmsk, msk) ||
+ !(e->bitmask & EBT_DESTMAC)))
return -EINVAL;
return 0;
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index c2cabbe6fa58..18ca4b24c418 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -139,7 +139,7 @@ ebt_basic_match(const struct ebt_entry *e, const struct sk_buff *skb,
ethproto = h->h_proto;
if (e->bitmask & EBT_802_3) {
- if (FWINV2(ntohs(ethproto) >= ETH_P_802_3_MIN, EBT_IPROTO))
+ if (FWINV2(eth_proto_is_802_3(ethproto), EBT_IPROTO))
return 1;
} else if (!(e->bitmask & EBT_NOPROTO) &&
FWINV2(e->ethproto != ethproto, EBT_IPROTO))

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