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Diffstat (limited to 'net/bridge')
-rw-r--r--net/bridge/br_fdb.c4
-rw-r--r--net/bridge/br_if.c23
-rw-r--r--net/bridge/br_input.c9
-rw-r--r--net/bridge/br_netfilter.c11
-rw-r--r--net/bridge/br_netlink.c9
-rw-r--r--net/bridge/br_notify.c5
-rw-r--r--net/bridge/br_private.h5
-rw-r--r--net/bridge/br_stp_bpdu.c5
-rw-r--r--net/bridge/netfilter/ebt_redirect.c3
-rw-r--r--net/bridge/netfilter/ebt_ulog.c8
-rw-r--r--net/bridge/netfilter/ebtables.c11
11 files changed, 55 insertions, 38 deletions
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index 26637439965b..6818e609b2c0 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -242,11 +242,11 @@ int br_fdb_test_addr(struct net_device *dev, unsigned char *addr)
struct net_bridge_fdb_entry *fdb;
int ret;
- if (!dev->br_port)
+ if (!br_port_exists(dev))
return 0;
rcu_read_lock();
- fdb = __br_fdb_get(dev->br_port->br, addr);
+ fdb = __br_fdb_get(br_port_get_rcu(dev)->br, addr);
ret = fdb && fdb->dst->dev != dev &&
fdb->dst->state == BR_STATE_FORWARDING;
rcu_read_unlock();
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 0d142ed0bbe3..c03d2c3ff03e 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -147,8 +147,9 @@ static void del_nbp(struct net_bridge_port *p)
list_del_rcu(&p->list);
+ dev->priv_flags &= ~IFF_BRIDGE_PORT;
+
netdev_rx_handler_unregister(dev);
- rcu_assign_pointer(dev->br_port, NULL);
br_multicast_del_port(p);
@@ -400,7 +401,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
return -ELOOP;
/* Device is already being bridged */
- if (dev->br_port != NULL)
+ if (br_port_exists(dev))
return -EBUSY;
/* No bridging devices that dislike that (e.g. wireless) */
@@ -431,11 +432,11 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
if (br_netpoll_info(br) && ((err = br_netpoll_enable(p))))
goto err3;
- rcu_assign_pointer(dev->br_port, p);
-
- err = netdev_rx_handler_register(dev, br_handle_frame, NULL);
+ err = netdev_rx_handler_register(dev, br_handle_frame, p);
if (err)
- goto err4;
+ goto err3;
+
+ dev->priv_flags |= IFF_BRIDGE_PORT;
dev_disable_lro(dev);
@@ -457,8 +458,6 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
kobject_uevent(&p->kobj, KOBJ_ADD);
return 0;
-err4:
- rcu_assign_pointer(dev->br_port, NULL);
err3:
sysfs_remove_link(br->ifobj, p->dev->name);
err2:
@@ -477,9 +476,13 @@ put_back:
/* called with RTNL */
int br_del_if(struct net_bridge *br, struct net_device *dev)
{
- struct net_bridge_port *p = dev->br_port;
+ struct net_bridge_port *p;
+
+ if (!br_port_exists(dev))
+ return -EINVAL;
- if (!p || p->br != br)
+ p = br_port_get(dev);
+ if (p->br != br)
return -EINVAL;
del_nbp(p);
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 99647d8f95c8..f076c9d79d5e 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -41,7 +41,7 @@ static int br_pass_frame_up(struct sk_buff *skb)
int br_handle_frame_finish(struct sk_buff *skb)
{
const unsigned char *dest = eth_hdr(skb)->h_dest;
- struct net_bridge_port *p = rcu_dereference(skb->dev->br_port);
+ struct net_bridge_port *p = br_port_get_rcu(skb->dev);
struct net_bridge *br;
struct net_bridge_fdb_entry *dst;
struct net_bridge_mdb_entry *mdst;
@@ -111,10 +111,9 @@ drop:
/* note: already called with rcu_read_lock (preempt_disabled) */
static int br_handle_local_finish(struct sk_buff *skb)
{
- struct net_bridge_port *p = rcu_dereference(skb->dev->br_port);
+ struct net_bridge_port *p = br_port_get_rcu(skb->dev);
- if (p)
- br_fdb_update(p->br, p, eth_hdr(skb)->h_source);
+ br_fdb_update(p->br, p, eth_hdr(skb)->h_source);
return 0; /* process further */
}
@@ -151,7 +150,7 @@ struct sk_buff *br_handle_frame(struct sk_buff *skb)
if (!skb)
return NULL;
- p = rcu_dereference(skb->dev->br_port);
+ p = br_port_get_rcu(skb->dev);
if (unlikely(is_link_local(dest))) {
/* Pause frames shouldn't be passed up by driver anyway */
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index 0685b2558ab5..f54404ddee53 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -127,16 +127,17 @@ void br_netfilter_rtable_init(struct net_bridge *br)
static inline struct rtable *bridge_parent_rtable(const struct net_device *dev)
{
- struct net_bridge_port *port = rcu_dereference(dev->br_port);
-
- return port ? &port->br->fake_rtable : NULL;
+ if (!br_port_exists(dev))
+ return NULL;
+ return &br_port_get_rcu(dev)->br->fake_rtable;
}
static inline struct net_device *bridge_parent(const struct net_device *dev)
{
- struct net_bridge_port *port = rcu_dereference(dev->br_port);
+ if (!br_port_exists(dev))
+ return NULL;
- return port ? port->br->dev : NULL;
+ return br_port_get_rcu(dev)->br->dev;
}
static inline struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb)
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index fe0a79018ab2..4a6a378c84e3 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -120,10 +120,11 @@ static int br_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
idx = 0;
for_each_netdev(net, dev) {
/* not a bridge port */
- if (dev->br_port == NULL || idx < cb->args[0])
+ if (!br_port_exists(dev) || idx < cb->args[0])
goto skip;
- if (br_fill_ifinfo(skb, dev->br_port, NETLINK_CB(cb->skb).pid,
+ if (br_fill_ifinfo(skb, br_port_get(dev),
+ NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq, RTM_NEWLINK,
NLM_F_MULTI) < 0)
break;
@@ -168,9 +169,9 @@ static int br_rtm_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
if (!dev)
return -ENODEV;
- p = dev->br_port;
- if (!p)
+ if (!br_port_exists(dev))
return -EINVAL;
+ p = br_port_get(dev);
/* if kernel STP is running, don't allow changes */
if (p->br->stp_enabled == BR_KERNEL_STP)
diff --git a/net/bridge/br_notify.c b/net/bridge/br_notify.c
index 717e1fd6133c..404d4e14c6a7 100644
--- a/net/bridge/br_notify.c
+++ b/net/bridge/br_notify.c
@@ -32,14 +32,15 @@ struct notifier_block br_device_notifier = {
static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
struct net_device *dev = ptr;
- struct net_bridge_port *p = dev->br_port;
+ struct net_bridge_port *p = br_port_get(dev);
struct net_bridge *br;
int err;
/* not a port of a bridge */
- if (p == NULL)
+ if (!br_port_exists(dev))
return NOTIFY_DONE;
+ p = br_port_get(dev);
br = p->br;
switch (event) {
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 0f5394c4f2f1..f6bc979b1135 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -150,6 +150,11 @@ struct net_bridge_port
#endif
};
+#define br_port_get_rcu(dev) \
+ ((struct net_bridge_port *) rcu_dereference(dev->rx_handler_data))
+#define br_port_get(dev) ((struct net_bridge_port *) dev->rx_handler_data)
+#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
+
struct br_cpu_netstats {
unsigned long rx_packets;
unsigned long rx_bytes;
diff --git a/net/bridge/br_stp_bpdu.c b/net/bridge/br_stp_bpdu.c
index 217bd225a42f..70aecb48fb69 100644
--- a/net/bridge/br_stp_bpdu.c
+++ b/net/bridge/br_stp_bpdu.c
@@ -137,12 +137,13 @@ void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
struct net_device *dev)
{
const unsigned char *dest = eth_hdr(skb)->h_dest;
- struct net_bridge_port *p = rcu_dereference(dev->br_port);
+ struct net_bridge_port *p;
struct net_bridge *br;
const unsigned char *buf;
- if (!p)
+ if (!br_port_exists(dev))
goto err;
+ p = br_port_get_rcu(dev);
if (!pskb_may_pull(skb, 4))
goto err;
diff --git a/net/bridge/netfilter/ebt_redirect.c b/net/bridge/netfilter/ebt_redirect.c
index 9e19166ba453..46624bb6d9be 100644
--- a/net/bridge/netfilter/ebt_redirect.c
+++ b/net/bridge/netfilter/ebt_redirect.c
@@ -24,8 +24,9 @@ ebt_redirect_tg(struct sk_buff *skb, const struct xt_action_param *par)
return EBT_DROP;
if (par->hooknum != NF_BR_BROUTING)
+ /* rcu_read_lock()ed by nf_hook_slow */
memcpy(eth_hdr(skb)->h_dest,
- par->in->br_port->br->dev->dev_addr, ETH_ALEN);
+ br_port_get_rcu(par->in)->br->dev->dev_addr, ETH_ALEN);
else
memcpy(eth_hdr(skb)->h_dest, par->in->dev_addr, ETH_ALEN);
skb->pkt_type = PACKET_HOST;
diff --git a/net/bridge/netfilter/ebt_ulog.c b/net/bridge/netfilter/ebt_ulog.c
index ae3c7cef1484..26377e96fa1c 100644
--- a/net/bridge/netfilter/ebt_ulog.c
+++ b/net/bridge/netfilter/ebt_ulog.c
@@ -177,8 +177,9 @@ static void ebt_ulog_packet(unsigned int hooknr, const struct sk_buff *skb,
if (in) {
strcpy(pm->physindev, in->name);
/* If in isn't a bridge, then physindev==indev */
- if (in->br_port)
- strcpy(pm->indev, in->br_port->br->dev->name);
+ if (br_port_exists(in))
+ /* rcu_read_lock()ed by nf_hook_slow */
+ strcpy(pm->indev, br_port_get_rcu(in)->br->dev->name);
else
strcpy(pm->indev, in->name);
} else
@@ -187,7 +188,8 @@ static void ebt_ulog_packet(unsigned int hooknr, const struct sk_buff *skb,
if (out) {
/* If out exists, then out is a bridge port */
strcpy(pm->physoutdev, out->name);
- strcpy(pm->outdev, out->br_port->br->dev->name);
+ /* rcu_read_lock()ed by nf_hook_slow */
+ strcpy(pm->outdev, br_port_get_rcu(out)->br->dev->name);
} else
pm->outdev[0] = pm->physoutdev[0] = '\0';
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 59ca00e40dec..bcc102e3be4d 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -140,11 +140,14 @@ ebt_basic_match(const struct ebt_entry *e, const struct ethhdr *h,
return 1;
if (FWINV2(ebt_dev_check(e->out, out), EBT_IOUT))
return 1;
- if ((!in || !in->br_port) ? 0 : FWINV2(ebt_dev_check(
- e->logical_in, in->br_port->br->dev), EBT_ILOGICALIN))
+ /* rcu_read_lock()ed by nf_hook_slow */
+ if (in && br_port_exists(in) &&
+ FWINV2(ebt_dev_check(e->logical_in, br_port_get_rcu(in)->br->dev),
+ EBT_ILOGICALIN))
return 1;
- if ((!out || !out->br_port) ? 0 : FWINV2(ebt_dev_check(
- e->logical_out, out->br_port->br->dev), EBT_ILOGICALOUT))
+ if (out && br_port_exists(out) &&
+ FWINV2(ebt_dev_check(e->logical_out, br_port_get_rcu(out)->br->dev),
+ EBT_ILOGICALOUT))
return 1;
if (e->bitmask & EBT_SOURCEMAC) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 13:25:04 +0000