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Diffstat (limited to 'net/tipc/bearer.c')
-rw-r--r--net/tipc/bearer.c147
1 files changed, 103 insertions, 44 deletions
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 27a5406213c6..65b1bbf133bd 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -1,7 +1,7 @@
/*
* net/tipc/bearer.c: TIPC bearer code
*
- * Copyright (c) 1996-2006, 2013-2014, Ericsson AB
+ * Copyright (c) 1996-2006, 2013-2016, Ericsson AB
* Copyright (c) 2004-2006, 2010-2013, Wind River Systems
* All rights reserved.
*
@@ -39,6 +39,7 @@
#include "bearer.h"
#include "link.h"
#include "discover.h"
+#include "monitor.h"
#include "bcast.h"
#include "netlink.h"
@@ -170,6 +171,27 @@ struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
return NULL;
}
+/* tipc_bearer_get_name - get the bearer name from its id.
+ * @net: network namespace
+ * @name: a pointer to the buffer where the name will be stored.
+ * @bearer_id: the id to get the name from.
+ */
+int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
+{
+ struct tipc_net *tn = tipc_net(net);
+ struct tipc_bearer *b;
+
+ if (bearer_id >= MAX_BEARERS)
+ return -EINVAL;
+
+ b = rtnl_dereference(tn->bearer_list[bearer_id]);
+ if (!b)
+ return -EINVAL;
+
+ strcpy(name, b->name);
+ return 0;
+}
+
void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
@@ -205,6 +227,7 @@ static int tipc_enable_bearer(struct net *net, const char *name,
struct tipc_bearer *b;
struct tipc_media *m;
struct tipc_bearer_names b_names;
+ struct sk_buff *skb;
char addr_string[16];
u32 bearer_id;
u32 with_this_prio;
@@ -223,7 +246,7 @@ static int tipc_enable_bearer(struct net *net, const char *name,
if (tipc_addr_domain_valid(disc_domain) &&
(disc_domain != tn->own_addr)) {
if (tipc_in_scope(disc_domain, tn->own_addr)) {
- disc_domain = tn->own_addr & TIPC_CLUSTER_MASK;
+ disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
res = 0; /* accept any node in own cluster */
} else if (in_own_cluster_exact(net, disc_domain))
res = 0; /* accept specified node in own cluster */
@@ -301,7 +324,7 @@ restart:
b->net_plane = bearer_id + 'A';
b->priority = priority;
- res = tipc_disc_create(net, b, &b->bcast_addr);
+ res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
if (res) {
bearer_disable(net, b);
pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
@@ -310,6 +333,11 @@ restart:
}
rcu_assign_pointer(tn->bearer_list[bearer_id], b);
+ if (skb)
+ tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
+
+ if (tipc_mon_create(net, bearer_id))
+ return -ENOMEM;
pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
name,
@@ -328,6 +356,21 @@ static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
return 0;
}
+/* tipc_bearer_reset_all - reset all links on all bearers
+ */
+void tipc_bearer_reset_all(struct net *net)
+{
+ struct tipc_net *tn = tipc_net(net);
+ struct tipc_bearer *b;
+ int i;
+
+ for (i = 0; i < MAX_BEARERS; i++) {
+ b = rcu_dereference_rtnl(tn->bearer_list[i]);
+ if (b)
+ tipc_reset_bearer(net, b);
+ }
+}
+
/**
* bearer_disable
*
@@ -335,24 +378,18 @@ static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
*/
static void bearer_disable(struct net *net, struct tipc_bearer *b)
{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
- u32 i;
+ struct tipc_net *tn = tipc_net(net);
+ int bearer_id = b->identity;
pr_info("Disabling bearer <%s>\n", b->name);
b->media->disable_media(b);
-
- tipc_node_delete_links(net, b->identity);
+ tipc_node_delete_links(net, bearer_id);
RCU_INIT_POINTER(b->media_ptr, NULL);
if (b->link_req)
tipc_disc_delete(b->link_req);
-
- for (i = 0; i < MAX_BEARERS; i++) {
- if (b == rtnl_dereference(tn->bearer_list[i])) {
- RCU_INIT_POINTER(tn->bearer_list[i], NULL);
- break;
- }
- }
+ RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
kfree_rcu(b, rcu);
+ tipc_mon_delete(net, bearer_id);
}
int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
@@ -394,7 +431,7 @@ void tipc_disable_l2_media(struct tipc_bearer *b)
/**
* tipc_l2_send_msg - send a TIPC packet out over an L2 interface
- * @buf: the packet to be sent
+ * @skb: the packet to be sent
* @b: the bearer through which the packet is to be sent
* @dest: peer destination address
*/
@@ -403,17 +440,21 @@ int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
{
struct net_device *dev;
int delta;
+ void *tipc_ptr;
dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
if (!dev)
return 0;
+ /* Send RESET message even if bearer is detached from device */
+ tipc_ptr = rcu_dereference_rtnl(dev->tipc_ptr);
+ if (unlikely(!tipc_ptr && !msg_is_reset(buf_msg(skb))))
+ goto drop;
+
delta = dev->hard_header_len - skb_headroom(skb);
if ((delta > 0) &&
- pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
- kfree_skb(skb);
- return 0;
- }
+ pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC))
+ goto drop;
skb_reset_network_header(skb);
skb->dev = dev;
@@ -422,6 +463,9 @@ int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
dev->dev_addr, skb->len);
dev_queue_xmit(skb);
return 0;
+drop:
+ kfree_skb(skb);
+ return 0;
}
int tipc_bearer_mtu(struct net *net, u32 bearer_id)
@@ -450,6 +494,8 @@ void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
if (likely(b))
b->media->send_msg(net, skb, b, dest);
+ else
+ kfree_skb(skb);
rcu_read_unlock();
}
@@ -468,11 +514,11 @@ void tipc_bearer_xmit(struct net *net, u32 bearer_id,
rcu_read_lock();
b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
- if (likely(b)) {
- skb_queue_walk_safe(xmitq, skb, tmp) {
- __skb_dequeue(xmitq);
- b->media->send_msg(net, skb, b, dst);
- }
+ if (unlikely(!b))
+ __skb_queue_purge(xmitq);
+ skb_queue_walk_safe(xmitq, skb, tmp) {
+ __skb_dequeue(xmitq);
+ b->media->send_msg(net, skb, b, dst);
}
rcu_read_unlock();
}
@@ -490,14 +536,14 @@ void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
rcu_read_lock();
b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
- if (likely(b)) {
- skb_queue_walk_safe(xmitq, skb, tmp) {
- hdr = buf_msg(skb);
- msg_set_non_seq(hdr, 1);
- msg_set_mc_netid(hdr, net_id);
- __skb_dequeue(xmitq);
- b->media->send_msg(net, skb, b, &b->bcast_addr);
- }
+ if (unlikely(!b))
+ __skb_queue_purge(xmitq);
+ skb_queue_walk_safe(xmitq, skb, tmp) {
+ hdr = buf_msg(skb);
+ msg_set_non_seq(hdr, 1);
+ msg_set_mc_netid(hdr, net_id);
+ __skb_dequeue(xmitq);
+ b->media->send_msg(net, skb, b, &b->bcast_addr);
}
rcu_read_unlock();
}
@@ -513,24 +559,21 @@ void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
* ignores packets sent using interface multicast, and traffic sent to other
* nodes (which can happen if interface is running in promiscuous mode).
*/
-static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
+static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt, struct net_device *orig_dev)
{
struct tipc_bearer *b;
rcu_read_lock();
b = rcu_dereference_rtnl(dev->tipc_ptr);
- if (likely(b)) {
- if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
- buf->next = NULL;
- tipc_rcv(dev_net(dev), buf, b);
- rcu_read_unlock();
- return NET_RX_SUCCESS;
- }
+ if (likely(b && (skb->pkt_type <= PACKET_BROADCAST))) {
+ skb->next = NULL;
+ tipc_rcv(dev_net(dev), skb, b);
+ rcu_read_unlock();
+ return NET_RX_SUCCESS;
}
rcu_read_unlock();
-
- kfree_skb(buf);
+ kfree_skb(skb);
return NET_RX_DROP;
}
@@ -548,9 +591,18 @@ static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct net *net = dev_net(dev);
+ struct tipc_net *tn = tipc_net(net);
struct tipc_bearer *b;
+ int i;
b = rtnl_dereference(dev->tipc_ptr);
+ if (!b) {
+ for (i = 0; i < MAX_BEARERS; b = NULL, i++) {
+ b = rtnl_dereference(tn->bearer_list[i]);
+ if (b && (b->media_ptr == dev))
+ break;
+ }
+ }
if (!b)
return NOTIFY_DONE;
@@ -560,13 +612,20 @@ static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
case NETDEV_CHANGE:
if (netif_carrier_ok(dev))
break;
+ case NETDEV_UP:
+ rcu_assign_pointer(dev->tipc_ptr, b);
+ break;
case NETDEV_GOING_DOWN:
+ RCU_INIT_POINTER(dev->tipc_ptr, NULL);
+ synchronize_net();
+ tipc_reset_bearer(net, b);
+ break;
case NETDEV_CHANGEMTU:
tipc_reset_bearer(net, b);
break;
case NETDEV_CHANGEADDR:
b->media->raw2addr(b, &b->addr,
- (char *)dev->dev_addr);
+ (char *)dev->dev_addr);
tipc_reset_bearer(net, b);
break;
case NETDEV_UNREGISTER:
@@ -794,7 +853,7 @@ int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
u32 prio;
prio = TIPC_MEDIA_LINK_PRI;
- domain = tn->own_addr & TIPC_CLUSTER_MASK;
+ domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
if (!info->attrs[TIPC_NLA_BEARER])
return -EINVAL;
generated by cgit v1.2.3 (git 2.46.0) at 2025-08-14 06:50:27 +0000